/*
- * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2015 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
+#include <sys/signalvar.h>
#include <sys/kauth.h>
#include <sys/mount_internal.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/syslog.h>
#include <sys/tprintf.h>
-#include <sys/uio_internal.h>
#include <libkern/OSAtomic.h>
#include <sys/time.h>
#include <kern/clock.h>
#include <kern/task.h>
#include <kern/thread.h>
+#include <kern/thread_call.h>
#include <sys/user.h>
+#include <sys/acct.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <nfs/rpcv2.h>
+#include <nfs/krpc.h>
#include <nfs/nfsproto.h>
#include <nfs/nfs.h>
#include <nfs/xdr_subs.h>
#include <nfs/nfsm_subs.h>
+#include <nfs/nfs_gss.h>
#include <nfs/nfsmount.h>
#include <nfs/nfsnode.h>
-#include <nfs/nfsrtt.h>
-#include <sys/kdebug.h>
+#define NFS_SOCK_DBG(...) NFS_DBG(NFS_FAC_SOCK, 7, ## __VA_ARGS__)
-#define FSDBG(A, B, C, D, E) \
- KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, (A))) | DBG_FUNC_NONE, \
- (int)(B), (int)(C), (int)(D), (int)(E), 0)
-#define FSDBG_TOP(A, B, C, D, E) \
- KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, (A))) | DBG_FUNC_START, \
- (int)(B), (int)(C), (int)(D), (int)(E), 0)
-#define FSDBG_BOT(A, B, C, D, E) \
- KERNEL_DEBUG((FSDBG_CODE(DBG_FSRW, (A))) | DBG_FUNC_END, \
- (int)(B), (int)(C), (int)(D), (int)(E), 0)
+/* XXX */
+boolean_t current_thread_aborted(void);
+kern_return_t thread_terminate(thread_t);
+
+
+#if NFSSERVER
+int nfsrv_sock_max_rec_queue_length = 128; /* max # RPC records queued on (UDP) socket */
+
+int nfsrv_getstream(struct nfsrv_sock *,int);
+int nfsrv_getreq(struct nfsrv_descript *);
+extern int nfsv3_procid[NFS_NPROCS];
+#endif /* NFSSERVER */
+
+/*
+ * compare two sockaddr structures
+ */
+int
+nfs_sockaddr_cmp(struct sockaddr *sa1, struct sockaddr *sa2)
+{
+ if (!sa1)
+ return (-1);
+ if (!sa2)
+ return (1);
+ if (sa1->sa_family != sa2->sa_family)
+ return ((sa1->sa_family < sa2->sa_family) ? -1 : 1);
+ if (sa1->sa_len != sa2->sa_len)
+ return ((sa1->sa_len < sa2->sa_len) ? -1 : 1);
+ if (sa1->sa_family == AF_INET)
+ return (bcmp(&((struct sockaddr_in*)sa1)->sin_addr,
+ &((struct sockaddr_in*)sa2)->sin_addr, sizeof(((struct sockaddr_in*)sa1)->sin_addr)));
+ if (sa1->sa_family == AF_INET6)
+ return (bcmp(&((struct sockaddr_in6*)sa1)->sin6_addr,
+ &((struct sockaddr_in6*)sa2)->sin6_addr, sizeof(((struct sockaddr_in6*)sa1)->sin6_addr)));
+ return (-1);
+}
+
+#if NFSCLIENT
+
+int nfs_connect_search_new_socket(struct nfsmount *, struct nfs_socket_search *, struct timeval *);
+int nfs_connect_search_socket_connect(struct nfsmount *, struct nfs_socket *, int);
+int nfs_connect_search_ping(struct nfsmount *, struct nfs_socket *, struct timeval *);
+void nfs_connect_search_socket_found(struct nfsmount *, struct nfs_socket_search *, struct nfs_socket *);
+void nfs_connect_search_socket_reap(struct nfsmount *, struct nfs_socket_search *, struct timeval *);
+int nfs_connect_search_check(struct nfsmount *, struct nfs_socket_search *, struct timeval *);
+int nfs_reconnect(struct nfsmount *);
+int nfs_connect_setup(struct nfsmount *);
+void nfs_mount_sock_thread(void *, wait_result_t);
+void nfs_udp_rcv(socket_t, void*, int);
+void nfs_tcp_rcv(socket_t, void*, int);
+void nfs_sock_poke(struct nfsmount *);
+void nfs_request_match_reply(struct nfsmount *, mbuf_t);
+void nfs_reqdequeue(struct nfsreq *);
+void nfs_reqbusy(struct nfsreq *);
+struct nfsreq *nfs_reqnext(struct nfsreq *);
+int nfs_wait_reply(struct nfsreq *);
+void nfs_softterm(struct nfsreq *);
+int nfs_can_squish(struct nfsmount *);
+int nfs_is_squishy(struct nfsmount *);
+int nfs_is_dead(int, struct nfsmount *);
/*
* Estimate rto for an nfs rpc sent via. an unreliable datagram.
((((n)->nm_srtt[t-1] + 7) >> 3) + (n)->nm_sdrtt[t-1] + 1)))
#define NFS_SRTT(r) (r)->r_nmp->nm_srtt[proct[(r)->r_procnum] - 1]
#define NFS_SDRTT(r) (r)->r_nmp->nm_sdrtt[proct[(r)->r_procnum] - 1]
-/*
- * External data, mostly RPC constants in XDR form
- */
-extern u_long rpc_reply, rpc_msgdenied, rpc_mismatch, rpc_vers, rpc_auth_unix,
- rpc_msgaccepted, rpc_call, rpc_autherr,
- rpc_auth_kerb;
-extern u_long nfs_prog;
-extern struct nfsstats nfsstats;
-extern int nfsv3_procid[NFS_NPROCS];
-extern int nfs_ticks;
-extern u_long nfs_xidwrap;
/*
* Defines which timer to use for the procnum.
#define NFS_CWNDSCALE 256
#define NFS_MAXCWND (NFS_CWNDSCALE * 32)
static int nfs_backoff[8] = { 2, 4, 8, 16, 32, 64, 128, 256, };
-int nfsrtton = 0;
-struct nfsrtt nfsrtt;
-
-static int nfs_rcvlock(struct nfsreq *);
-static void nfs_rcvunlock(struct nfsreq *);
-static int nfs_receive(struct nfsreq *rep, mbuf_t *mp);
-static int nfs_reconnect(struct nfsreq *rep);
-static void nfs_repdequeue(struct nfsreq *rep);
-
-/* XXX */
-boolean_t current_thread_aborted(void);
-kern_return_t thread_terminate(thread_t);
-
-#ifndef NFS_NOSERVER
-static int nfsrv_getstream(struct nfssvc_sock *,int);
-
-int (*nfsrv3_procs[NFS_NPROCS])(struct nfsrv_descript *nd,
- struct nfssvc_sock *slp,
- proc_t procp,
- mbuf_t *mreqp) = {
- nfsrv_null,
- nfsrv_getattr,
- nfsrv_setattr,
- nfsrv_lookup,
- nfsrv3_access,
- nfsrv_readlink,
- nfsrv_read,
- nfsrv_write,
- nfsrv_create,
- nfsrv_mkdir,
- nfsrv_symlink,
- nfsrv_mknod,
- nfsrv_remove,
- nfsrv_rmdir,
- nfsrv_rename,
- nfsrv_link,
- nfsrv_readdir,
- nfsrv_readdirplus,
- nfsrv_statfs,
- nfsrv_fsinfo,
- nfsrv_pathconf,
- nfsrv_commit,
- nfsrv_noop
-};
-#endif /* NFS_NOSERVER */
-
/*
- * attempt to bind a socket to a reserved port
+ * Increment location index to next address/server/location.
*/
-static int
-nfs_bind_resv(struct nfsmount *nmp)
+void
+nfs_location_next(struct nfs_fs_locations *nlp, struct nfs_location_index *nlip)
{
- socket_t so = nmp->nm_so;
- struct sockaddr_in sin;
- int error;
- u_short tport;
-
- if (!so)
- return (EINVAL);
-
- sin.sin_len = sizeof (struct sockaddr_in);
- sin.sin_family = AF_INET;
- sin.sin_addr.s_addr = INADDR_ANY;
- tport = IPPORT_RESERVED - 1;
- sin.sin_port = htons(tport);
+ uint8_t loc = nlip->nli_loc;
+ uint8_t serv = nlip->nli_serv;
+ uint8_t addr = nlip->nli_addr;
+
+ /* move to next address */
+ addr++;
+ if (addr >= nlp->nl_locations[loc]->nl_servers[serv]->ns_addrcount) {
+ /* no more addresses on current server, go to first address of next server */
+next_server:
+ addr = 0;
+ serv++;
+ if (serv >= nlp->nl_locations[loc]->nl_servcount) {
+ /* no more servers on current location, go to first server of next location */
+ serv = 0;
+ loc++;
+ if (loc >= nlp->nl_numlocs)
+ loc = 0; /* after last location, wrap back around to first location */
+ }
+ }
+ /*
+ * It's possible for this next server to not have any addresses.
+ * Check for that here and go to the next server.
+ * But bail out if we've managed to come back around to the original
+ * location that was passed in. (That would mean no servers had any
+ * addresses. And we don't want to spin here forever.)
+ */
+ if ((loc == nlip->nli_loc) && (serv == nlip->nli_serv) && (addr == nlip->nli_addr))
+ return;
+ if (addr >= nlp->nl_locations[loc]->nl_servers[serv]->ns_addrcount)
+ goto next_server;
- while (((error = sock_bind(so, (struct sockaddr *) &sin)) == EADDRINUSE) &&
- (--tport > IPPORT_RESERVED / 2))
- sin.sin_port = htons(tport);
- return (error);
+ nlip->nli_loc = loc;
+ nlip->nli_serv = serv;
+ nlip->nli_addr = addr;
}
/*
- * variables for managing the nfs_bind_resv_thread
+ * Compare two location indices.
*/
-int nfs_resv_mounts = 0;
-static int nfs_bind_resv_thread_state = 0;
-#define NFS_BIND_RESV_THREAD_STATE_INITTED 1
-#define NFS_BIND_RESV_THREAD_STATE_RUNNING 2
-lck_grp_t *nfs_bind_resv_lck_grp;
-lck_grp_attr_t *nfs_bind_resv_lck_grp_attr;
-lck_attr_t *nfs_bind_resv_lck_attr;
-lck_mtx_t *nfs_bind_resv_mutex;
-struct nfs_bind_resv_request {
- TAILQ_ENTRY(nfs_bind_resv_request) brr_chain;
- struct nfsmount *brr_nmp;
- int brr_error;
-};
-static TAILQ_HEAD(, nfs_bind_resv_request) nfs_bind_resv_request_queue;
+int
+nfs_location_index_cmp(struct nfs_location_index *nlip1, struct nfs_location_index *nlip2)
+{
+ if (nlip1->nli_loc != nlip2->nli_loc)
+ return (nlip1->nli_loc - nlip2->nli_loc);
+ if (nlip1->nli_serv != nlip2->nli_serv)
+ return (nlip1->nli_serv - nlip2->nli_serv);
+ return (nlip1->nli_addr - nlip2->nli_addr);
+}
/*
- * thread to handle any reserved port bind requests
+ * Get the mntfromname (or path portion only) for a given location.
*/
-static void
-nfs_bind_resv_thread(void)
+void
+nfs_location_mntfromname(struct nfs_fs_locations *locs, struct nfs_location_index idx, char *s, int size, int pathonly)
{
- struct nfs_bind_resv_request *brreq;
-
- nfs_bind_resv_thread_state = NFS_BIND_RESV_THREAD_STATE_RUNNING;
-
- while (nfs_resv_mounts > 0) {
- lck_mtx_lock(nfs_bind_resv_mutex);
- while ((brreq = TAILQ_FIRST(&nfs_bind_resv_request_queue))) {
- TAILQ_REMOVE(&nfs_bind_resv_request_queue, brreq, brr_chain);
- lck_mtx_unlock(nfs_bind_resv_mutex);
- brreq->brr_error = nfs_bind_resv(brreq->brr_nmp);
- wakeup(brreq);
- lck_mtx_lock(nfs_bind_resv_mutex);
+ struct nfs_fs_location *fsl = locs->nl_locations[idx.nli_loc];
+ char *p;
+ int cnt, i;
+
+ p = s;
+ if (!pathonly) {
+ cnt = snprintf(p, size, "%s:", fsl->nl_servers[idx.nli_serv]->ns_name);
+ p += cnt;
+ size -= cnt;
+ }
+ if (fsl->nl_path.np_compcount == 0) {
+ /* mounting root export on server */
+ if (size > 0) {
+ *p++ = '/';
+ *p++ = '\0';
}
- msleep((caddr_t)&nfs_bind_resv_request_queue,
- nfs_bind_resv_mutex, PSOCK | PDROP,
- "nfs_bind_resv_request_queue", 0);
+ return;
+ }
+ /* append each server path component */
+ for (i=0; (size > 0) && (i < (int)fsl->nl_path.np_compcount); i++) {
+ cnt = snprintf(p, size, "/%s", fsl->nl_path.np_components[i]);
+ p += cnt;
+ size -= cnt;
}
-
- nfs_bind_resv_thread_state = NFS_BIND_RESV_THREAD_STATE_INITTED;
- (void) thread_terminate(current_thread());
-}
-
-int
-nfs_bind_resv_thread_wake(void)
-{
- if (nfs_bind_resv_thread_state < NFS_BIND_RESV_THREAD_STATE_RUNNING)
- return (EIO);
- wakeup(&nfs_bind_resv_request_queue);
- return (0);
}
/*
- * underprivileged procs call this to request nfs_bind_resv_thread
- * to perform the reserved port binding for them.
+ * NFS client connect socket upcall.
+ * (Used only during socket connect/search.)
*/
-static int
-nfs_bind_resv_nopriv(struct nfsmount *nmp)
+void
+nfs_connect_upcall(socket_t so, void *arg, __unused int waitflag)
{
- struct nfs_bind_resv_request brreq;
- int error;
+ struct nfs_socket *nso = arg;
+ size_t rcvlen;
+ mbuf_t m;
+ int error = 0, recv = 1;
- if (nfs_bind_resv_thread_state < NFS_BIND_RESV_THREAD_STATE_RUNNING) {
- if (nfs_bind_resv_thread_state < NFS_BIND_RESV_THREAD_STATE_INITTED) {
- nfs_bind_resv_lck_grp_attr = lck_grp_attr_alloc_init();
- nfs_bind_resv_lck_grp = lck_grp_alloc_init("nfs_bind_resv", nfs_bind_resv_lck_grp_attr);
- nfs_bind_resv_lck_attr = lck_attr_alloc_init();
- nfs_bind_resv_mutex = lck_mtx_alloc_init(nfs_bind_resv_lck_grp, nfs_bind_resv_lck_attr);
- TAILQ_INIT(&nfs_bind_resv_request_queue);
- nfs_bind_resv_thread_state = NFS_BIND_RESV_THREAD_STATE_INITTED;
- }
- kernel_thread(kernel_task, nfs_bind_resv_thread);
- nfs_bind_resv_thread_state = NFS_BIND_RESV_THREAD_STATE_RUNNING;
+ if (nso->nso_flags & NSO_CONNECTING) {
+ NFS_SOCK_DBG("nfs connect - socket %p upcall - connecting\n", nso);
+ wakeup(nso->nso_wake);
+ return;
}
- brreq.brr_nmp = nmp;
- brreq.brr_error = 0;
+ lck_mtx_lock(&nso->nso_lock);
+ if ((nso->nso_flags & (NSO_UPCALL|NSO_DISCONNECTING|NSO_DEAD)) || !(nso->nso_flags & NSO_PINGING)) {
+ NFS_SOCK_DBG("nfs connect - socket %p upcall - nevermind\n", nso);
+ lck_mtx_unlock(&nso->nso_lock);
+ return;
+ }
+ NFS_SOCK_DBG("nfs connect - socket %p upcall\n", nso);
+ nso->nso_flags |= NSO_UPCALL;
- lck_mtx_lock(nfs_bind_resv_mutex);
- TAILQ_INSERT_TAIL(&nfs_bind_resv_request_queue, &brreq, brr_chain);
- lck_mtx_unlock(nfs_bind_resv_mutex);
+ /* loop while we make error-free progress */
+ while (!error && recv) {
+ /* make sure we're still interested in this socket */
+ if (nso->nso_flags & (NSO_DISCONNECTING|NSO_DEAD))
+ break;
+ lck_mtx_unlock(&nso->nso_lock);
+ m = NULL;
+ if (nso->nso_sotype == SOCK_STREAM) {
+ error = nfs_rpc_record_read(so, &nso->nso_rrs, MSG_DONTWAIT, &recv, &m);
+ } else {
+ rcvlen = 1000000;
+ error = sock_receivembuf(so, NULL, &m, MSG_DONTWAIT, &rcvlen);
+ recv = m ? 1 : 0;
+ }
+ lck_mtx_lock(&nso->nso_lock);
+ if (m) {
+ /* match response with request */
+ struct nfsm_chain nmrep;
+ uint32_t reply = 0, rxid = 0, verf_type, verf_len;
+ uint32_t reply_status, rejected_status, accepted_status;
+
+ nfsm_chain_dissect_init(error, &nmrep, m);
+ nfsm_chain_get_32(error, &nmrep, rxid);
+ nfsm_chain_get_32(error, &nmrep, reply);
+ if (!error && ((reply != RPC_REPLY) || (rxid != nso->nso_pingxid)))
+ error = EBADRPC;
+ nfsm_chain_get_32(error, &nmrep, reply_status);
+ if (!error && (reply_status == RPC_MSGDENIED)) {
+ nfsm_chain_get_32(error, &nmrep, rejected_status);
+ if (!error)
+ error = (rejected_status == RPC_MISMATCH) ? ERPCMISMATCH : EACCES;
+ }
+ nfsm_chain_get_32(error, &nmrep, verf_type); /* verifier flavor */
+ nfsm_chain_get_32(error, &nmrep, verf_len); /* verifier length */
+ nfsmout_if(error);
+ if (verf_len)
+ nfsm_chain_adv(error, &nmrep, nfsm_rndup(verf_len));
+ nfsm_chain_get_32(error, &nmrep, accepted_status);
+ nfsmout_if(error);
+ if ((accepted_status == RPC_PROGMISMATCH) && !nso->nso_version) {
+ uint32_t minvers, maxvers;
+ nfsm_chain_get_32(error, &nmrep, minvers);
+ nfsm_chain_get_32(error, &nmrep, maxvers);
+ nfsmout_if(error);
+ if (nso->nso_protocol == PMAPPROG) {
+ if ((minvers > RPCBVERS4) || (maxvers < PMAPVERS))
+ error = EPROGMISMATCH;
+ else if ((nso->nso_saddr->sa_family == AF_INET) &&
+ (PMAPVERS >= minvers) && (PMAPVERS <= maxvers))
+ nso->nso_version = PMAPVERS;
+ else if (nso->nso_saddr->sa_family == AF_INET6) {
+ if ((RPCBVERS4 >= minvers) && (RPCBVERS4 <= maxvers))
+ nso->nso_version = RPCBVERS4;
+ else if ((RPCBVERS3 >= minvers) && (RPCBVERS3 <= maxvers))
+ nso->nso_version = RPCBVERS3;
+ }
+ } else if (nso->nso_protocol == NFS_PROG) {
+ int vers;
- error = nfs_bind_resv_thread_wake();
- if (error) {
- TAILQ_REMOVE(&nfs_bind_resv_request_queue, &brreq, brr_chain);
- /* Note: we might be able to simply restart the thread */
- return (error);
+ /*
+ * N.B. Both portmapper and rpcbind V3 are happy to return
+ * addresses for other versions than the one you ask (getport or
+ * getaddr) and thus we may have fallen to this code path. So if
+ * we get a version that we support, use highest supported
+ * version. This assumes that the server supports all versions
+ * between minvers and maxvers. Note for IPv6 we will try and
+ * use rpcbind V4 which has getversaddr and we should not get
+ * here if that was successful.
+ */
+ for (vers = nso->nso_nfs_max_vers; vers >= (int)nso->nso_nfs_min_vers; vers--) {
+ if (vers >= (int)minvers && vers <= (int)maxvers)
+ break;
+ }
+ nso->nso_version = (vers < (int)nso->nso_nfs_min_vers) ? 0 : vers;
+ }
+ if (!error && nso->nso_version)
+ accepted_status = RPC_SUCCESS;
+ }
+ if (!error) {
+ switch (accepted_status) {
+ case RPC_SUCCESS:
+ error = 0;
+ break;
+ case RPC_PROGUNAVAIL:
+ error = EPROGUNAVAIL;
+ break;
+ case RPC_PROGMISMATCH:
+ error = EPROGMISMATCH;
+ break;
+ case RPC_PROCUNAVAIL:
+ error = EPROCUNAVAIL;
+ break;
+ case RPC_GARBAGE:
+ error = EBADRPC;
+ break;
+ case RPC_SYSTEM_ERR:
+ default:
+ error = EIO;
+ break;
+ }
+ }
+nfsmout:
+ nso->nso_flags &= ~NSO_PINGING;
+ if (error) {
+ nso->nso_error = error;
+ nso->nso_flags |= NSO_DEAD;
+ } else {
+ nso->nso_flags |= NSO_VERIFIED;
+ }
+ mbuf_freem(m);
+ /* wake up search thread */
+ wakeup(nso->nso_wake);
+ break;
+ }
}
- tsleep((caddr_t)&brreq, PSOCK, "nfsbindresv", 0);
-
- return (brreq.brr_error);
+ nso->nso_flags &= ~NSO_UPCALL;
+ if ((error != EWOULDBLOCK) && (error || !recv)) {
+ /* problems with the socket... */
+ nso->nso_error = error ? error : EPIPE;
+ nso->nso_flags |= NSO_DEAD;
+ wakeup(nso->nso_wake);
+ }
+ if (nso->nso_flags & NSO_DISCONNECTING)
+ wakeup(&nso->nso_flags);
+ lck_mtx_unlock(&nso->nso_lock);
}
/*
- * Initialize sockets and congestion for a new NFS connection.
- * We do not free the sockaddr if error.
+ * Create/initialize an nfs_socket structure.
*/
int
-nfs_connect(
+nfs_socket_create(
struct nfsmount *nmp,
- __unused struct nfsreq *rep)
+ struct sockaddr *sa,
+ int sotype,
+ in_port_t port,
+ uint32_t protocol,
+ uint32_t vers,
+ int resvport,
+ struct nfs_socket **nsop)
{
- socket_t so;
- int error, rcvreserve, sndreserve;
- struct sockaddr *saddr;
- struct timeval timeo;
+ struct nfs_socket *nso;
+ struct timeval now;
+ int error;
+#ifdef NFS_SOCKET_DEBUGGING
+ char naddr[MAX_IPv6_STR_LEN];
+ void *sinaddr;
- nmp->nm_so = 0;
- saddr = mbuf_data(nmp->nm_nam);
- error = sock_socket(saddr->sa_family, nmp->nm_sotype,
- nmp->nm_soproto, 0, 0, &nmp->nm_so);
- if (error) {
- goto bad;
- }
- so = nmp->nm_so;
+ if (sa->sa_family == AF_INET)
+ sinaddr = &((struct sockaddr_in*)sa)->sin_addr;
+ else
+ sinaddr = &((struct sockaddr_in6*)sa)->sin6_addr;
+ if (inet_ntop(sa->sa_family, sinaddr, naddr, sizeof(naddr)) != naddr)
+ strlcpy(naddr, "<unknown>", sizeof(naddr));
+#else
+ char naddr[1] = { 0 };
+#endif
- /*
- * Some servers require that the client port be a reserved port number.
- */
- if (saddr->sa_family == AF_INET && (nmp->nm_flag & NFSMNT_RESVPORT)) {
- proc_t p;
- /*
- * sobind() requires current_proc() to have superuser privs.
- * If this bind is part of a reconnect, and the current proc
- * doesn't have superuser privs, we hand the sobind() off to
- * a kernel thread to process.
- */
- if ((nmp->nm_state & NFSSTA_MOUNTED) &&
- (p = current_proc()) && suser(kauth_cred_get(), 0)) {
- /* request nfs_bind_resv_thread() to do bind */
- error = nfs_bind_resv_nopriv(nmp);
- } else {
- error = nfs_bind_resv(nmp);
- }
- if (error)
- goto bad;
- }
+ *nsop = NULL;
- /*
- * Protocols that do not require connections may be optionally left
- * unconnected for servers that reply from a port other than NFS_PORT.
- */
- if (nmp->nm_flag & NFSMNT_NOCONN) {
- if (nmp->nm_sotype == SOCK_STREAM) {
- error = ENOTCONN;
- goto bad;
- }
- } else {
- struct timeval tv;
- tv.tv_sec = 2;
- tv.tv_usec = 0;
- error = sock_connect(so, mbuf_data(nmp->nm_nam), MSG_DONTWAIT);
- if (error && error != EINPROGRESS) {
- goto bad;
- }
-
- while ((error = sock_connectwait(so, &tv)) == EINPROGRESS) {
- if (rep && (error = nfs_sigintr(nmp, rep, rep->r_procp))) {
- goto bad;
- }
- }
- }
-
- /*
- * Always time out on recieve, this allows us to reconnect the
- * socket to deal with network changes.
- */
- timeo.tv_usec = 0;
- timeo.tv_sec = 2;
- error = sock_setsockopt(so, SOL_SOCKET, SO_RCVTIMEO, &timeo, sizeof(timeo));
- if (nmp->nm_flag & (NFSMNT_SOFT | NFSMNT_INT)) {
- timeo.tv_sec = 5;
- } else {
- timeo.tv_sec = 0;
+ /* Create the socket. */
+ MALLOC(nso, struct nfs_socket *, sizeof(struct nfs_socket), M_TEMP, M_WAITOK|M_ZERO);
+ if (nso)
+ MALLOC(nso->nso_saddr, struct sockaddr *, sa->sa_len, M_SONAME, M_WAITOK|M_ZERO);
+ if (!nso || !nso->nso_saddr) {
+ if (nso)
+ FREE(nso, M_TEMP);
+ return (ENOMEM);
}
- error = sock_setsockopt(so, SOL_SOCKET, SO_SNDTIMEO, &timeo, sizeof(timeo));
-
- if (nmp->nm_sotype == SOCK_DGRAM) {
- sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR) * 3;
- rcvreserve = (nmp->nm_rsize + NFS_MAXPKTHDR) *
- (nmp->nm_readahead > 0 ? nmp->nm_readahead + 1 : 2);
- } else if (nmp->nm_sotype == SOCK_SEQPACKET) {
- sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR) * 3;
- rcvreserve = (nmp->nm_rsize + NFS_MAXPKTHDR) *
- (nmp->nm_readahead > 0 ? nmp->nm_readahead + 1 : 2);
- } else {
- int proto;
- int on = 1;
-
- sock_gettype(so, NULL, NULL, &proto);
- if (nmp->nm_sotype != SOCK_STREAM)
- panic("nfscon sotype");
-
- // Assume that SOCK_STREAM always requires a connection
- sock_setsockopt(so, SOL_SOCKET, SO_KEEPALIVE, &on, sizeof(on));
-
- if (proto == IPPROTO_TCP) {
- sock_setsockopt(so, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on));
+ lck_mtx_init(&nso->nso_lock, nfs_request_grp, LCK_ATTR_NULL);
+ nso->nso_sotype = sotype;
+ if (nso->nso_sotype == SOCK_STREAM)
+ nfs_rpc_record_state_init(&nso->nso_rrs);
+ microuptime(&now);
+ nso->nso_timestamp = now.tv_sec;
+ bcopy(sa, nso->nso_saddr, sa->sa_len);
+ if (sa->sa_family == AF_INET)
+ ((struct sockaddr_in*)nso->nso_saddr)->sin_port = htons(port);
+ else if (sa->sa_family == AF_INET6)
+ ((struct sockaddr_in6*)nso->nso_saddr)->sin6_port = htons(port);
+ nso->nso_protocol = protocol;
+ nso->nso_version = vers;
+ nso->nso_nfs_min_vers = PVER2MAJOR(nmp->nm_min_vers);
+ nso->nso_nfs_max_vers = PVER2MAJOR(nmp->nm_max_vers);
+
+ error = sock_socket(sa->sa_family, nso->nso_sotype, 0, NULL, NULL, &nso->nso_so);
+
+ /* Some servers require that the client port be a reserved port number. */
+ if (!error && resvport && ((sa->sa_family == AF_INET) || (sa->sa_family == AF_INET6))) {
+ struct sockaddr_storage ss;
+ int level = (sa->sa_family == AF_INET) ? IPPROTO_IP : IPPROTO_IPV6;
+ int optname = (sa->sa_family == AF_INET) ? IP_PORTRANGE : IPV6_PORTRANGE;
+ int portrange = IP_PORTRANGE_LOW;
+
+ error = sock_setsockopt(nso->nso_so, level, optname, &portrange, sizeof(portrange));
+ if (!error) { /* bind now to check for failure */
+ ss.ss_len = sa->sa_len;
+ ss.ss_family = sa->sa_family;
+ if (ss.ss_family == AF_INET) {
+ ((struct sockaddr_in*)&ss)->sin_addr.s_addr = INADDR_ANY;
+ ((struct sockaddr_in*)&ss)->sin_port = htons(0);
+ } else if (ss.ss_family == AF_INET6) {
+ ((struct sockaddr_in6*)&ss)->sin6_addr = in6addr_any;
+ ((struct sockaddr_in6*)&ss)->sin6_port = htons(0);
+ } else {
+ error = EINVAL;
+ }
+ if (!error)
+ error = sock_bind(nso->nso_so, (struct sockaddr*)&ss);
}
-
- sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR + sizeof (u_long)) * 3;
- rcvreserve = (nmp->nm_rsize + NFS_MAXPKTHDR + sizeof (u_long)) *
- (nmp->nm_readahead > 0 ? nmp->nm_readahead + 1 : 2);
}
- if (sndreserve > NFS_MAXSOCKBUF)
- sndreserve = NFS_MAXSOCKBUF;
- if (rcvreserve > NFS_MAXSOCKBUF)
- rcvreserve = NFS_MAXSOCKBUF;
- error = sock_setsockopt(so, SOL_SOCKET, SO_SNDBUF, &sndreserve, sizeof(sndreserve));
if (error) {
- goto bad;
- }
- error = sock_setsockopt(so, SOL_SOCKET, SO_RCVBUF, &rcvreserve, sizeof(rcvreserve));
- if (error) {
- goto bad;
+ NFS_SOCK_DBG("nfs connect %s error %d creating socket %p %s type %d%s port %d prot %d %d\n",
+ vfs_statfs(nmp->nm_mountp)->f_mntfromname, error, nso, naddr, sotype,
+ resvport ? "r" : "", port, protocol, vers);
+ nfs_socket_destroy(nso);
+ } else {
+ NFS_SOCK_DBG("nfs connect %s created socket %p %s type %d%s port %d prot %d %d\n",
+ vfs_statfs(nmp->nm_mountp)->f_mntfromname, nso, naddr,
+ sotype, resvport ? "r" : "", port, protocol, vers);
+ *nsop = nso;
}
-
- sock_nointerrupt(so, 1);
-
- /* Initialize other non-zero congestion variables */
- nmp->nm_srtt[0] = nmp->nm_srtt[1] = nmp->nm_srtt[2] =
- nmp->nm_srtt[3] = (NFS_TIMEO << 3);
- nmp->nm_sdrtt[0] = nmp->nm_sdrtt[1] = nmp->nm_sdrtt[2] =
- nmp->nm_sdrtt[3] = 0;
- nmp->nm_cwnd = NFS_MAXCWND / 2; /* Initial send window */
- nmp->nm_sent = 0;
- FSDBG(529, nmp, nmp->nm_state, nmp->nm_soflags, nmp->nm_cwnd);
- nmp->nm_timeouts = 0;
- return (0);
-
-bad:
- nfs_disconnect(nmp);
return (error);
}
/*
- * Reconnect routine:
- * Called when a connection is broken on a reliable protocol.
- * - clean up the old socket
- * - nfs_connect() again
- * - set R_MUSTRESEND for all outstanding requests on mount point
- * If this fails the mount point is DEAD!
- * nb: Must be called with the nfs_sndlock() set on the mount point.
+ * Destroy an nfs_socket structure.
*/
-static int
-nfs_reconnect(struct nfsreq *rep)
+void
+nfs_socket_destroy(struct nfs_socket *nso)
{
- struct nfsreq *rp;
- struct nfsmount *nmp = rep->r_nmp;
- int error;
-
- nfs_disconnect(nmp);
- while ((error = nfs_connect(nmp, rep))) {
- if (error == EINTR || error == ERESTART)
- return (EINTR);
- if (error == EIO)
- return (EIO);
- nfs_down(rep->r_nmp, rep->r_procp, error, NFSSTA_TIMEO,
- "can not connect");
- rep->r_flags |= R_TPRINTFMSG;
- if (!(nmp->nm_state & NFSSTA_MOUNTED)) {
- /* we're not yet completely mounted and */
- /* we can't reconnect, so we fail */
- return (error);
- }
- if ((error = nfs_sigintr(rep->r_nmp, rep, rep->r_procp)))
- return (error);
- tsleep((caddr_t)&lbolt, PSOCK, "nfscon", 0);
- }
+ struct timespec ts = { 4, 0 };
+
+ lck_mtx_lock(&nso->nso_lock);
+ nso->nso_flags |= NSO_DISCONNECTING;
+ if (nso->nso_flags & NSO_UPCALL) /* give upcall a chance to complete */
+ msleep(&nso->nso_flags, &nso->nso_lock, PZERO-1, "nfswaitupcall", &ts);
+ lck_mtx_unlock(&nso->nso_lock);
+ sock_shutdown(nso->nso_so, SHUT_RDWR);
+ sock_close(nso->nso_so);
+ if (nso->nso_sotype == SOCK_STREAM)
+ nfs_rpc_record_state_cleanup(&nso->nso_rrs);
+ lck_mtx_destroy(&nso->nso_lock, nfs_request_grp);
+ if (nso->nso_saddr)
+ FREE(nso->nso_saddr, M_SONAME);
+ if (nso->nso_saddr2)
+ FREE(nso->nso_saddr2, M_SONAME);
+ NFS_SOCK_DBG("nfs connect - socket %p destroyed\n", nso);
+ FREE(nso, M_TEMP);
+}
+/*
+ * Set common socket options on an nfs_socket.
+ */
+void
+nfs_socket_options(struct nfsmount *nmp, struct nfs_socket *nso)
+{
/*
- * Loop through outstanding request list and fix up all requests
- * on old socket.
+ * Set socket send/receive timeouts
+ * - Receive timeout shouldn't matter because most receives are performed
+ * in the socket upcall non-blocking.
+ * - Send timeout should allow us to react to a blocked socket.
+ * Soft mounts will want to abort sooner.
*/
- TAILQ_FOREACH(rp, &nfs_reqq, r_chain) {
- if (rp->r_nmp == nmp)
- rp->r_flags |= R_MUSTRESEND;
+ struct timeval timeo;
+ int on = 1, proto;
+
+ timeo.tv_usec = 0;
+ timeo.tv_sec = (NMFLAG(nmp, SOFT) || nfs_can_squish(nmp)) ? 5 : 60;
+ sock_setsockopt(nso->nso_so, SOL_SOCKET, SO_RCVTIMEO, &timeo, sizeof(timeo));
+ sock_setsockopt(nso->nso_so, SOL_SOCKET, SO_SNDTIMEO, &timeo, sizeof(timeo));
+ if (nso->nso_sotype == SOCK_STREAM) {
+ /* Assume that SOCK_STREAM always requires a connection */
+ sock_setsockopt(nso->nso_so, SOL_SOCKET, SO_KEEPALIVE, &on, sizeof(on));
+ /* set nodelay for TCP */
+ sock_gettype(nso->nso_so, NULL, NULL, &proto);
+ if (proto == IPPROTO_TCP)
+ sock_setsockopt(nso->nso_so, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on));
}
- return (0);
+ if (nso->nso_sotype == SOCK_DGRAM) { /* set socket buffer sizes for UDP */
+ int reserve = NFS_UDPSOCKBUF;
+ sock_setsockopt(nso->nso_so, SOL_SOCKET, SO_SNDBUF, &reserve, sizeof(reserve));
+ sock_setsockopt(nso->nso_so, SOL_SOCKET, SO_RCVBUF, &reserve, sizeof(reserve));
+ }
+ /* set SO_NOADDRERR to detect network changes ASAP */
+ sock_setsockopt(nso->nso_so, SOL_SOCKET, SO_NOADDRERR, &on, sizeof(on));
+ /* just playin' it safe with upcalls */
+ sock_setsockopt(nso->nso_so, SOL_SOCKET, SO_UPCALLCLOSEWAIT, &on, sizeof(on));
+ /* socket should be interruptible if the mount is */
+ if (!NMFLAG(nmp, INTR))
+ sock_nointerrupt(nso->nso_so, 1);
}
/*
- * NFS disconnect. Clean up and unlink.
+ * Release resources held in an nfs_socket_search.
*/
void
-nfs_disconnect(struct nfsmount *nmp)
+nfs_socket_search_cleanup(struct nfs_socket_search *nss)
{
- socket_t so;
+ struct nfs_socket *nso, *nsonext;
- if (nmp->nm_so) {
- so = nmp->nm_so;
- nmp->nm_so = 0;
- sock_shutdown(so, 2);
- sock_close(so);
+ TAILQ_FOREACH_SAFE(nso, &nss->nss_socklist, nso_link, nsonext) {
+ TAILQ_REMOVE(&nss->nss_socklist, nso, nso_link);
+ nss->nss_sockcnt--;
+ nfs_socket_destroy(nso);
+ }
+ if (nss->nss_sock) {
+ nfs_socket_destroy(nss->nss_sock);
+ nss->nss_sock = NULL;
}
}
/*
- * This is the nfs send routine. For connection based socket types, it
- * must be called with an nfs_sndlock() on the socket.
- * "rep == NULL" indicates that it has been called from a server.
- * For the client side:
- * - return EINTR if the RPC is terminated, 0 otherwise
- * - set R_MUSTRESEND if the send fails for any reason
- * - do any cleanup required by recoverable socket errors (???)
- * For the server side:
- * - return EINTR or ERESTART if interrupted by a signal
- * - return EPIPE if a connection is lost for connection based sockets (TCP...)
- * - do any cleanup required by recoverable socket errors (???)
+ * Prefer returning certain errors over others.
+ * This function returns a ranking of the given error.
*/
int
-nfs_send(so, nam, top, rep)
- socket_t so;
- mbuf_t nam;
- mbuf_t top;
- struct nfsreq *rep;
+nfs_connect_error_class(int error)
{
- struct sockaddr *sendnam;
- int error, error2, sotype, flags;
- u_long xidqueued = 0;
- struct nfsreq *rp;
- char savenametolog[MAXPATHLEN];
- struct msghdr msg;
+ switch (error) {
+ case 0:
+ return (0);
+ case ETIMEDOUT:
+ case EAGAIN:
+ return (1);
+ case EPIPE:
+ case EADDRNOTAVAIL:
+ case ENETDOWN:
+ case ENETUNREACH:
+ case ENETRESET:
+ case ECONNABORTED:
+ case ECONNRESET:
+ case EISCONN:
+ case ENOTCONN:
+ case ESHUTDOWN:
+ case ECONNREFUSED:
+ case EHOSTDOWN:
+ case EHOSTUNREACH:
+ return (2);
+ case ERPCMISMATCH:
+ case EPROCUNAVAIL:
+ case EPROGMISMATCH:
+ case EPROGUNAVAIL:
+ return (3);
+ case EBADRPC:
+ return (4);
+ default:
+ return (5);
+ }
+}
+
+/*
+ * Make sure a socket search returns the best error.
+ */
+void
+nfs_socket_search_update_error(struct nfs_socket_search *nss, int error)
+{
+ if (nfs_connect_error_class(error) >= nfs_connect_error_class(nss->nss_error))
+ nss->nss_error = error;
+}
+
+/* nfs_connect_search_new_socket:
+ * Given a socket search structure for an nfs mount try to find a new socket from the set of addresses specified
+ * by nss.
+ *
+ * nss_last is set to -1 at initialization to indicate the first time. Its set to -2 if address was found but
+ * could not be used or if a socket timed out.
+ */
+int
+nfs_connect_search_new_socket(struct nfsmount *nmp, struct nfs_socket_search *nss, struct timeval *now)
+{
+ struct nfs_fs_location *fsl;
+ struct nfs_fs_server *fss;
+ struct sockaddr_storage ss;
+ struct nfs_socket *nso;
+ char *addrstr;
+ int error = 0;
- if (rep) {
- error = nfs_sigintr(rep->r_nmp, rep, rep->r_procp);
- if (error) {
- mbuf_freem(top);
- return (error);
+
+ NFS_SOCK_DBG("nfs connect %s nss_addrcnt = %d\n",
+ vfs_statfs(nmp->nm_mountp)->f_mntfromname, nss->nss_addrcnt);
+
+ /*
+ * while there are addresses and:
+ * we have no sockets or
+ * the last address failed and did not produce a socket (nss_last < 0) or
+ * Its been a while (2 seconds) and we have less than the max number of concurrent sockets to search (4)
+ * then attempt to create a socket with the current address.
+ */
+ while (nss->nss_addrcnt > 0 && ((nss->nss_last < 0) || (nss->nss_sockcnt == 0) ||
+ ((nss->nss_sockcnt < 4) && (now->tv_sec >= (nss->nss_last + 2))))) {
+ if (nmp->nm_sockflags & NMSOCK_UNMOUNT)
+ return (EINTR);
+ /* Can we convert the address to a sockaddr? */
+ fsl = nmp->nm_locations.nl_locations[nss->nss_nextloc.nli_loc];
+ fss = fsl->nl_servers[nss->nss_nextloc.nli_serv];
+ addrstr = fss->ns_addresses[nss->nss_nextloc.nli_addr];
+ if (!nfs_uaddr2sockaddr(addrstr, (struct sockaddr*)&ss)) {
+ nfs_location_next(&nmp->nm_locations, &nss->nss_nextloc);
+ nss->nss_addrcnt -= 1;
+ nss->nss_last = -2;
+ continue;
}
- if ((so = rep->r_nmp->nm_so) == NULL) {
- rep->r_flags |= R_MUSTRESEND;
- mbuf_freem(top);
- return (0);
+ /* Check that socket family is acceptable. */
+ if (nmp->nm_sofamily && (ss.ss_family != nmp->nm_sofamily)) {
+ nfs_location_next(&nmp->nm_locations, &nss->nss_nextloc);
+ nss->nss_addrcnt -= 1;
+ nss->nss_last = -2;
+ continue;
}
- rep->r_flags &= ~R_MUSTRESEND;
- TAILQ_FOREACH(rp, &nfs_reqq, r_chain)
- if (rp == rep)
- break;
- if (rp)
- xidqueued = rp->r_xid;
- }
- sock_gettype(so, NULL, &sotype, NULL);
- if ((sotype == SOCK_STREAM) || (sock_isconnected(so)) ||
- (nam == 0))
- sendnam = (struct sockaddr *)0;
- else
- sendnam = mbuf_data(nam);
- if (sotype == SOCK_SEQPACKET)
- flags = MSG_EOR;
- else
- flags = 0;
+ /* Create the socket. */
+ error = nfs_socket_create(nmp, (struct sockaddr*)&ss, nss->nss_sotype,
+ nss->nss_port, nss->nss_protocol, nss->nss_version,
+ ((nss->nss_protocol == NFS_PROG) && NMFLAG(nmp, RESVPORT)), &nso);
+ if (error)
+ return (error);
- /*
- * Save the name here in case mount point goes away if we block.
- * The name is using local stack and is large, but don't
- * want to block if we malloc.
- */
- if (rep)
- strncpy(savenametolog,
- vfs_statfs(rep->r_nmp->nm_mountp)->f_mntfromname,
- MAXPATHLEN - 1);
- bzero(&msg, sizeof(msg));
- msg.msg_name = (caddr_t)sendnam;
- msg.msg_namelen = sendnam == 0 ? 0 : sendnam->sa_len;
- error = sock_sendmbuf(so, &msg, top, flags, NULL);
+ nso->nso_location = nss->nss_nextloc;
+ nso->nso_wake = nss;
+ error = sock_setupcall(nso->nso_so, nfs_connect_upcall, nso);
+ if (error) {
+ lck_mtx_lock(&nso->nso_lock);
+ nso->nso_error = error;
+ nso->nso_flags |= NSO_DEAD;
+ lck_mtx_unlock(&nso->nso_lock);
+ }
- if (error) {
- if (rep) {
- if (xidqueued) {
- TAILQ_FOREACH(rp, &nfs_reqq, r_chain)
- if (rp == rep && rp->r_xid == xidqueued)
- break;
- if (!rp)
- panic("nfs_send: error %d xid %x gone",
- error, xidqueued);
- }
- log(LOG_INFO, "nfs send error %d for server %s\n",
- error, savenametolog);
- /*
- * Deal with errors for the client side.
- */
- error2 = nfs_sigintr(rep->r_nmp, rep, rep->r_procp);
- if (error2) {
- error = error2;
- } else {
- rep->r_flags |= R_MUSTRESEND;
- }
- } else
- log(LOG_INFO, "nfsd send error %d\n", error);
+ TAILQ_INSERT_TAIL(&nss->nss_socklist, nso, nso_link);
+ nss->nss_sockcnt++;
+ nfs_location_next(&nmp->nm_locations, &nss->nss_nextloc);
+ nss->nss_addrcnt -= 1;
+
+ nss->nss_last = now->tv_sec;
+ }
- /*
- * Handle any recoverable (soft) socket errors here. (???)
- */
- if (error != EINTR && error != ERESTART && error != EIO &&
- error != EWOULDBLOCK && error != EPIPE) {
+ if (nss->nss_addrcnt == 0 && nss->nss_last < 0)
+ nss->nss_last = now->tv_sec;
+
+ return (error);
+}
+
+/*
+ * nfs_connect_search_socket_connect: Connect an nfs socket nso for nfsmount nmp.
+ * If successful set the socket options for the socket as require from the mount.
+ *
+ * Assumes: nso->nso_lock is held on entry and return.
+ */
+int
+nfs_connect_search_socket_connect(struct nfsmount *nmp, struct nfs_socket *nso, int verbose)
+{
+ int error;
+
+ if ((nso->nso_sotype != SOCK_STREAM) && NMFLAG(nmp, NOCONNECT)) {
+ /* no connection needed, just say it's already connected */
+ NFS_SOCK_DBG("nfs connect %s UDP socket %p noconnect\n",
+ vfs_statfs(nmp->nm_mountp)->f_mntfromname, nso);
+ nso->nso_flags |= NSO_CONNECTED;
+ nfs_socket_options(nmp, nso);
+ return (1); /* Socket is connected and setup */
+ } else if (!(nso->nso_flags & NSO_CONNECTING)) {
+ /* initiate the connection */
+ nso->nso_flags |= NSO_CONNECTING;
+ lck_mtx_unlock(&nso->nso_lock);
+ NFS_SOCK_DBG("nfs connect %s connecting socket %p\n",
+ vfs_statfs(nmp->nm_mountp)->f_mntfromname, nso);
+ error = sock_connect(nso->nso_so, nso->nso_saddr, MSG_DONTWAIT);
+ lck_mtx_lock(&nso->nso_lock);
+ if (error && (error != EINPROGRESS)) {
+ nso->nso_error = error;
+ nso->nso_flags |= NSO_DEAD;
+ return (0);
+ }
+ }
+ if (nso->nso_flags & NSO_CONNECTING) {
+ /* check the connection */
+ if (sock_isconnected(nso->nso_so)) {
+ NFS_SOCK_DBG("nfs connect %s socket %p is connected\n",
+ vfs_statfs(nmp->nm_mountp)->f_mntfromname, nso);
+ nso->nso_flags &= ~NSO_CONNECTING;
+ nso->nso_flags |= NSO_CONNECTED;
+ nfs_socket_options(nmp, nso);
+ return (1); /* Socket is connected and setup */
+ } else {
+ int optlen = sizeof(error);
error = 0;
+ sock_getsockopt(nso->nso_so, SOL_SOCKET, SO_ERROR, &error, &optlen);
+ if (error) { /* we got an error on the socket */
+ NFS_SOCK_DBG("nfs connect %s socket %p connection error %d\n",
+ vfs_statfs(nmp->nm_mountp)->f_mntfromname, nso, error);
+ if (verbose)
+ printf("nfs connect socket error %d for %s\n",
+ error, vfs_statfs(nmp->nm_mountp)->f_mntfromname);
+ nso->nso_error = error;
+ nso->nso_flags |= NSO_DEAD;
+ return (0);
+ }
}
}
- return (error);
+
+ return (0); /* Waiting to be connected */
}
/*
- * Receive a Sun RPC Request/Reply. For SOCK_DGRAM, the work is all
- * done by soreceive(), but for SOCK_STREAM we must deal with the Record
- * Mark and consolidate the data into a new mbuf list.
- * nb: Sometimes TCP passes the data up to soreceive() in long lists of
- * small mbufs.
- * For SOCK_STREAM we must be very careful to read an entire record once
- * we have read any of it, even if the system call has been interrupted.
+ * nfs_connect_search_ping: Send a null proc on the nso socket.
*/
-static int
-nfs_receive(struct nfsreq *rep, mbuf_t *mp)
+int
+nfs_connect_search_ping(struct nfsmount *nmp, struct nfs_socket *nso, struct timeval *now)
{
- socket_t so;
- struct iovec_32 aio;
- mbuf_t m, mlast;
- u_long len, fraglen;
- int error, error2, sotype;
- proc_t p = current_proc(); /* XXX */
+ /* initiate a NULL RPC request */
+ uint64_t xid = nso->nso_pingxid;
+ mbuf_t m, mreq = NULL;
struct msghdr msg;
- size_t rcvlen;
- int lastfragment;
+ size_t reqlen, sentlen;
+ uint32_t vers = nso->nso_version;
+ int error;
- /*
- * Set up arguments for soreceive()
- */
- *mp = NULL;
- sotype = rep->r_nmp->nm_sotype;
+ if (!vers) {
+ if (nso->nso_protocol == PMAPPROG)
+ vers = (nso->nso_saddr->sa_family == AF_INET) ? PMAPVERS : RPCBVERS4;
+ else if (nso->nso_protocol == NFS_PROG)
+ vers = PVER2MAJOR(nmp->nm_max_vers);
+ }
+ lck_mtx_unlock(&nso->nso_lock);
+ error = nfsm_rpchead2(nmp, nso->nso_sotype, nso->nso_protocol, vers, 0, RPCAUTH_SYS,
+ vfs_context_ucred(vfs_context_kernel()), NULL, NULL, &xid, &mreq);
+ lck_mtx_lock(&nso->nso_lock);
+ if (!error) {
+ nso->nso_flags |= NSO_PINGING;
+ nso->nso_pingxid = R_XID32(xid);
+ nso->nso_reqtimestamp = now->tv_sec;
+ bzero(&msg, sizeof(msg));
+ if ((nso->nso_sotype != SOCK_STREAM) && !sock_isconnected(nso->nso_so)) {
+ msg.msg_name = nso->nso_saddr;
+ msg.msg_namelen = nso->nso_saddr->sa_len;
+ }
+ for (reqlen=0, m=mreq; m; m = mbuf_next(m))
+ reqlen += mbuf_len(m);
+ lck_mtx_unlock(&nso->nso_lock);
+ error = sock_sendmbuf(nso->nso_so, &msg, mreq, 0, &sentlen);
+ NFS_SOCK_DBG("nfs connect %s verifying socket %p send rv %d\n",
+ vfs_statfs(nmp->nm_mountp)->f_mntfromname, nso, error);
+ lck_mtx_lock(&nso->nso_lock);
+ if (!error && (sentlen != reqlen))
+ error = ETIMEDOUT;
+ }
+ if (error) {
+ nso->nso_error = error;
+ nso->nso_flags |= NSO_DEAD;
+ return (0);
+ }
+
+ return (1);
+}
+
+/*
+ * nfs_connect_search_socket_found: Take the found socket of the socket search list and assign it to the searched socket.
+ * Set the nfs socket protocol and version if needed.
+ */
+void
+nfs_connect_search_socket_found(struct nfsmount *nmp, struct nfs_socket_search *nss, struct nfs_socket *nso)
+{
+ NFS_SOCK_DBG("nfs connect %s socket %p verified\n",
+ vfs_statfs(nmp->nm_mountp)->f_mntfromname, nso);
+ if (!nso->nso_version) {
+ /* If the version isn't set, the default must have worked. */
+ if (nso->nso_protocol == PMAPPROG)
+ nso->nso_version = (nso->nso_saddr->sa_family == AF_INET) ? PMAPVERS : RPCBVERS4;
+ if (nso->nso_protocol == NFS_PROG)
+ nso->nso_version = PVER2MAJOR(nmp->nm_max_vers);
+ }
+ TAILQ_REMOVE(&nss->nss_socklist, nso, nso_link);
+ nss->nss_sockcnt--;
+ nss->nss_sock = nso;
+}
+
+/*
+ * nfs_connect_search_socket_reap: For each socket in the search list mark any timed out socket as dead and remove from
+ * the list. Dead socket are then destroyed.
+ */
+void
+nfs_connect_search_socket_reap(struct nfsmount *nmp __unused, struct nfs_socket_search *nss, struct timeval *now)
+{
+ struct nfs_socket *nso, *nsonext;
+
+ TAILQ_FOREACH_SAFE(nso, &nss->nss_socklist, nso_link, nsonext) {
+ lck_mtx_lock(&nso->nso_lock);
+ if (now->tv_sec >= (nso->nso_timestamp + nss->nss_timeo)) {
+ /* took too long */
+ NFS_SOCK_DBG("nfs connect %s socket %p timed out\n",
+ vfs_statfs(nmp->nm_mountp)->f_mntfromname, nso);
+ nso->nso_error = ETIMEDOUT;
+ nso->nso_flags |= NSO_DEAD;
+ }
+ if (!(nso->nso_flags & NSO_DEAD)) {
+ lck_mtx_unlock(&nso->nso_lock);
+ continue;
+ }
+ lck_mtx_unlock(&nso->nso_lock);
+ NFS_SOCK_DBG("nfs connect %s reaping socket %p %d\n",
+ vfs_statfs(nmp->nm_mountp)->f_mntfromname, nso, nso->nso_error);
+ nfs_socket_search_update_error(nss, nso->nso_error);
+ TAILQ_REMOVE(&nss->nss_socklist, nso, nso_link);
+ nss->nss_sockcnt--;
+ nfs_socket_destroy(nso);
+ /* If there are more sockets to try, force the starting of another socket */
+ if (nss->nss_addrcnt > 0)
+ nss->nss_last = -2;
+ }
+}
+
+/*
+ * nfs_connect_search_check: Check on the status of search and wait for replies if needed.
+ */
+int
+nfs_connect_search_check(struct nfsmount *nmp, struct nfs_socket_search *nss, struct timeval *now)
+{
+ int error;
+
+ /* log a warning if connect is taking a while */
+ if (((now->tv_sec - nss->nss_timestamp) >= 8) && ((nss->nss_flags & (NSS_VERBOSE|NSS_WARNED)) == NSS_VERBOSE)) {
+ printf("nfs_connect: socket connect taking a while for %s\n", vfs_statfs(nmp->nm_mountp)->f_mntfromname);
+ nss->nss_flags |= NSS_WARNED;
+ }
+ if (nmp->nm_sockflags & NMSOCK_UNMOUNT)
+ return (EINTR);
+ if ((error = nfs_sigintr(nmp, NULL, current_thread(), 0)))
+ return (error);
+
+ /* If we were succesfull at sending a ping, wait up to a second for a reply */
+ if (nss->nss_last >= 0)
+ tsleep(nss, PSOCK, "nfs_connect_search_wait", hz);
+
+ return (0);
+}
+
+
+/*
+ * Continue the socket search until we have something to report.
+ */
+int
+nfs_connect_search_loop(struct nfsmount *nmp, struct nfs_socket_search *nss)
+{
+ struct nfs_socket *nso;
+ struct timeval now;
+ int error;
+ int verbose = (nss->nss_flags & NSS_VERBOSE);
+
+loop:
+ microuptime(&now);
+ NFS_SOCK_DBG("nfs connect %s search %ld\n", vfs_statfs(nmp->nm_mountp)->f_mntfromname, now.tv_sec);
+
+ /* add a new socket to the socket list if needed and available */
+ error = nfs_connect_search_new_socket(nmp, nss, &now);
+ if (error) {
+ NFS_SOCK_DBG("nfs connect returned %d\n", error);
+ return (error);
+ }
+
+ /* check each active socket on the list and try to push it along */
+ TAILQ_FOREACH(nso, &nss->nss_socklist, nso_link) {
+ lck_mtx_lock(&nso->nso_lock);
+
+ /* If not connected connect it */
+ if (!(nso->nso_flags & NSO_CONNECTED)) {
+ if (!nfs_connect_search_socket_connect(nmp, nso, verbose)) {
+ lck_mtx_unlock(&nso->nso_lock);
+ continue;
+ }
+ }
+
+ /* If the socket hasn't been verified or in a ping, ping it. We also handle UDP retransmits */
+ if (!(nso->nso_flags & (NSO_PINGING|NSO_VERIFIED)) ||
+ ((nso->nso_sotype == SOCK_DGRAM) && (now.tv_sec >= nso->nso_reqtimestamp+2))) {
+ if (!nfs_connect_search_ping(nmp, nso, &now)) {
+ lck_mtx_unlock(&nso->nso_lock);
+ continue;
+ }
+ }
+
+ /* Has the socket been verified by the up call routine? */
+ if (nso->nso_flags & NSO_VERIFIED) {
+ /* WOOHOO!! This socket looks good! */
+ nfs_connect_search_socket_found(nmp, nss, nso);
+ lck_mtx_unlock(&nso->nso_lock);
+ break;
+ }
+ lck_mtx_unlock(&nso->nso_lock);
+ }
+
+ /* Check for timed out sockets and mark as dead and then remove all dead sockets. */
+ nfs_connect_search_socket_reap(nmp, nss, &now);
+
+ /*
+ * Keep looping if we haven't found a socket yet and we have more
+ * sockets to (continue to) try.
+ */
+ error = 0;
+ if (!nss->nss_sock && (!TAILQ_EMPTY(&nss->nss_socklist) || nss->nss_addrcnt)) {
+ error = nfs_connect_search_check(nmp, nss, &now);
+ if (!error)
+ goto loop;
+ }
+
+ NFS_SOCK_DBG("nfs connect %s returning %d\n", vfs_statfs(nmp->nm_mountp)->f_mntfromname, error);
+ return (error);
+}
+
+/*
+ * Initialize a new NFS connection.
+ *
+ * Search for a location to connect a socket to and initialize the connection.
+ *
+ * An NFS mount may have multiple locations/servers/addresses available.
+ * We attempt to connect to each one asynchronously and will start
+ * several sockets in parallel if other locations are slow to answer.
+ * We'll use the first NFS socket we can successfully set up.
+ *
+ * The search may involve contacting the portmapper service first.
+ *
+ * A mount's initial connection may require negotiating some parameters such
+ * as socket type and NFS version.
+ */
+
+int
+nfs_connect(struct nfsmount *nmp, int verbose, int timeo)
+{
+ struct nfs_socket_search nss;
+ struct nfs_socket *nso, *nsonfs;
+ struct sockaddr_storage ss;
+ struct sockaddr *saddr, *oldsaddr;
+ sock_upcall upcall;
+ struct timeval now, start;
+ int error, savederror, nfsvers;
+ int tryv4 = 1;
+ uint8_t sotype = nmp->nm_sotype ? nmp->nm_sotype : SOCK_STREAM;
+ fhandle_t *fh = NULL;
+ char *path = NULL;
+ in_port_t port;
+ int addrtotal = 0;
+
+ /* paranoia... check that we have at least one address in the locations */
+ uint32_t loc, serv;
+ for (loc=0; loc < nmp->nm_locations.nl_numlocs; loc++) {
+ for (serv=0; serv < nmp->nm_locations.nl_locations[loc]->nl_servcount; serv++) {
+ addrtotal += nmp->nm_locations.nl_locations[loc]->nl_servers[serv]->ns_addrcount;
+ if (nmp->nm_locations.nl_locations[loc]->nl_servers[serv]->ns_addrcount == 0)
+ NFS_SOCK_DBG("nfs connect %s search, server %s has no addresses\n",
+ vfs_statfs(nmp->nm_mountp)->f_mntfromname,
+ nmp->nm_locations.nl_locations[loc]->nl_servers[serv]->ns_name);
+ }
+ }
+
+ if (addrtotal == 0) {
+ NFS_SOCK_DBG("nfs connect %s search failed, no addresses\n",
+ vfs_statfs(nmp->nm_mountp)->f_mntfromname);
+ return (EINVAL);
+ } else
+ NFS_SOCK_DBG("nfs connect %s has %d addresses\n",
+ vfs_statfs(nmp->nm_mountp)->f_mntfromname, addrtotal);
+
+ lck_mtx_lock(&nmp->nm_lock);
+ nmp->nm_sockflags |= NMSOCK_CONNECTING;
+ nmp->nm_nss = &nss;
+ lck_mtx_unlock(&nmp->nm_lock);
+ microuptime(&start);
+ savederror = error = 0;
+
+tryagain:
+ /* initialize socket search state */
+ bzero(&nss, sizeof(nss));
+ nss.nss_addrcnt = addrtotal;
+ nss.nss_error = savederror;
+ TAILQ_INIT(&nss.nss_socklist);
+ nss.nss_sotype = sotype;
+ nss.nss_startloc = nmp->nm_locations.nl_current;
+ nss.nss_timestamp = start.tv_sec;
+ nss.nss_timeo = timeo;
+ if (verbose)
+ nss.nss_flags |= NSS_VERBOSE;
+
+ /* First time connecting, we may need to negotiate some things */
+ if (!(nmp->nm_sockflags & NMSOCK_HASCONNECTED)) {
+ if (!nmp->nm_vers) {
+ /* No NFS version specified... */
+ if (!nmp->nm_nfsport || (!NM_OMATTR_GIVEN(nmp, FH) && !nmp->nm_mountport)) {
+ if (PVER2MAJOR(nmp->nm_max_vers) >= NFS_VER4 && tryv4) {
+ nss.nss_port = NFS_PORT;
+ nss.nss_protocol = NFS_PROG;
+ nss.nss_version = 4;
+ nss.nss_flags |= NSS_FALLBACK2PMAP;
+ } else {
+ /* ...connect to portmapper first if we (may) need any ports. */
+ nss.nss_port = PMAPPORT;
+ nss.nss_protocol = PMAPPROG;
+ nss.nss_version = 0;
+ }
+ } else {
+ /* ...connect to NFS port first. */
+ nss.nss_port = nmp->nm_nfsport;
+ nss.nss_protocol = NFS_PROG;
+ nss.nss_version = 0;
+ }
+ } else if (nmp->nm_vers >= NFS_VER4) {
+ if (tryv4) {
+ /* For NFSv4, we use the given (or default) port. */
+ nss.nss_port = nmp->nm_nfsport ? nmp->nm_nfsport : NFS_PORT;
+ nss.nss_protocol = NFS_PROG;
+ nss.nss_version = 4;
+ /*
+ * set NSS_FALLBACK2PMAP here to pick up any non standard port
+ * if no port is specified on the mount;
+ * Note nm_vers is set so we will only try NFS_VER4.
+ */
+ if (!nmp->nm_nfsport)
+ nss.nss_flags |= NSS_FALLBACK2PMAP;
+ } else {
+ nss.nss_port = PMAPPORT;
+ nss.nss_protocol = PMAPPROG;
+ nss.nss_version = 0;
+ }
+ } else {
+ /* For NFSv3/v2... */
+ if (!nmp->nm_nfsport || (!NM_OMATTR_GIVEN(nmp, FH) && !nmp->nm_mountport)) {
+ /* ...connect to portmapper first if we need any ports. */
+ nss.nss_port = PMAPPORT;
+ nss.nss_protocol = PMAPPROG;
+ nss.nss_version = 0;
+ } else {
+ /* ...connect to NFS port first. */
+ nss.nss_port = nmp->nm_nfsport;
+ nss.nss_protocol = NFS_PROG;
+ nss.nss_version = nmp->nm_vers;
+ }
+ }
+ NFS_SOCK_DBG("nfs connect first %s, so type %d port %d prot %d %d\n",
+ vfs_statfs(nmp->nm_mountp)->f_mntfromname, nss.nss_sotype, nss.nss_port,
+ nss.nss_protocol, nss.nss_version);
+ } else {
+ /* we've connected before, just connect to NFS port */
+ if (!nmp->nm_nfsport) {
+ /* need to ask portmapper which port that would be */
+ nss.nss_port = PMAPPORT;
+ nss.nss_protocol = PMAPPROG;
+ nss.nss_version = 0;
+ } else {
+ nss.nss_port = nmp->nm_nfsport;
+ nss.nss_protocol = NFS_PROG;
+ nss.nss_version = nmp->nm_vers;
+ }
+ NFS_SOCK_DBG("nfs connect %s, so type %d port %d prot %d %d\n",
+ vfs_statfs(nmp->nm_mountp)->f_mntfromname, nss.nss_sotype, nss.nss_port,
+ nss.nss_protocol, nss.nss_version);
+ }
+
+ /* Set next location to first valid location. */
+ /* If start location is invalid, find next location. */
+ nss.nss_nextloc = nss.nss_startloc;
+ if ((nss.nss_nextloc.nli_serv >= nmp->nm_locations.nl_locations[nss.nss_nextloc.nli_loc]->nl_servcount) ||
+ (nss.nss_nextloc.nli_addr >= nmp->nm_locations.nl_locations[nss.nss_nextloc.nli_loc]->nl_servers[nss.nss_nextloc.nli_serv]->ns_addrcount)) {
+ nfs_location_next(&nmp->nm_locations, &nss.nss_nextloc);
+ if (!nfs_location_index_cmp(&nss.nss_nextloc, &nss.nss_startloc)) {
+ NFS_SOCK_DBG("nfs connect %s search failed, couldn't find a valid location index\n",
+ vfs_statfs(nmp->nm_mountp)->f_mntfromname);
+ return (ENOENT);
+ }
+ }
+ nss.nss_last = -1;
+
+keepsearching:
+
+ error = nfs_connect_search_loop(nmp, &nss);
+ if (error || !nss.nss_sock) {
+ /* search failed */
+ nfs_socket_search_cleanup(&nss);
+ if (nss.nss_flags & NSS_FALLBACK2PMAP) {
+ tryv4 = 0;
+ NFS_SOCK_DBG("nfs connect %s TCP failed for V4 %d %d, trying PORTMAP\n",
+ vfs_statfs(nmp->nm_mountp)->f_mntfromname, error, nss.nss_error);
+ goto tryagain;
+ }
+
+ if (!error && (nss.nss_sotype == SOCK_STREAM) && !nmp->nm_sotype && (nmp->nm_vers < NFS_VER4)) {
+ /* Try using UDP */
+ sotype = SOCK_DGRAM;
+ savederror = nss.nss_error;
+ NFS_SOCK_DBG("nfs connect %s TCP failed %d %d, trying UDP\n",
+ vfs_statfs(nmp->nm_mountp)->f_mntfromname, error, nss.nss_error);
+ goto tryagain;
+ }
+ if (!error)
+ error = nss.nss_error ? nss.nss_error : ETIMEDOUT;
+ lck_mtx_lock(&nmp->nm_lock);
+ nmp->nm_sockflags &= ~NMSOCK_CONNECTING;
+ nmp->nm_nss = NULL;
+ lck_mtx_unlock(&nmp->nm_lock);
+ if (nss.nss_flags & NSS_WARNED)
+ log(LOG_INFO, "nfs_connect: socket connect aborted for %s\n",
+ vfs_statfs(nmp->nm_mountp)->f_mntfromname);
+ if (fh)
+ FREE(fh, M_TEMP);
+ if (path)
+ FREE_ZONE(path, MAXPATHLEN, M_NAMEI);
+ NFS_SOCK_DBG("nfs connect %s search failed, returning %d\n",
+ vfs_statfs(nmp->nm_mountp)->f_mntfromname, error);
+ return (error);
+ }
+
+ /* try to use nss_sock */
+ nso = nss.nss_sock;
+ nss.nss_sock = NULL;
+
+ /* We may be speaking to portmap first... to determine port(s). */
+ if (nso->nso_saddr->sa_family == AF_INET)
+ port = ntohs(((struct sockaddr_in*)nso->nso_saddr)->sin_port);
+ else
+ port = ntohs(((struct sockaddr_in6*)nso->nso_saddr)->sin6_port);
+ if (port == PMAPPORT) {
+ /* Use this portmapper port to get the port #s we need. */
+ NFS_SOCK_DBG("nfs connect %s got portmapper socket %p\n",
+ vfs_statfs(nmp->nm_mountp)->f_mntfromname, nso);
+
+ /* remove the connect upcall so nfs_portmap_lookup() can use this socket */
+ sock_setupcall(nso->nso_so, NULL, NULL);
+
+ /* Set up socket address and port for NFS socket. */
+ bcopy(nso->nso_saddr, &ss, nso->nso_saddr->sa_len);
+
+ /* If NFS version not set, try nm_max_vers down to nm_min_vers */
+ nfsvers = nmp->nm_vers ? nmp->nm_vers : PVER2MAJOR(nmp->nm_max_vers);
+ if (!(port = nmp->nm_nfsport)) {
+ if (ss.ss_family == AF_INET)
+ ((struct sockaddr_in*)&ss)->sin_port = htons(0);
+ else if (ss.ss_family == AF_INET6)
+ ((struct sockaddr_in6*)&ss)->sin6_port = htons(0);
+ for (; nfsvers >= (int)PVER2MAJOR(nmp->nm_min_vers); nfsvers--) {
+ if (nmp->nm_vers && nmp->nm_vers != nfsvers)
+ continue; /* Wrong version */
+ if (nfsvers == NFS_VER4 && nso->nso_sotype == SOCK_DGRAM)
+ continue; /* NFSv4 does not do UDP */
+ error = nfs_portmap_lookup(nmp, vfs_context_current(), (struct sockaddr*)&ss,
+ nso->nso_so, NFS_PROG, nfsvers,
+ (nso->nso_sotype == SOCK_DGRAM) ? IPPROTO_UDP : IPPROTO_TCP, timeo);
+ if (!error) {
+ if (ss.ss_family == AF_INET)
+ port = ntohs(((struct sockaddr_in*)&ss)->sin_port);
+ else if (ss.ss_family == AF_INET6)
+ port = ntohs(((struct sockaddr_in6*)&ss)->sin6_port);
+ if (!port)
+ error = EPROGUNAVAIL;
+ if (port == NFS_PORT && nfsvers == NFS_VER4 && tryv4 == 0)
+ continue; /* We already tried this */
+ }
+ if (!error)
+ break;
+ }
+ if (nfsvers < (int)PVER2MAJOR(nmp->nm_min_vers) && error == 0)
+ error = EPROGUNAVAIL;
+ if (error) {
+ nfs_socket_search_update_error(&nss, error);
+ nfs_socket_destroy(nso);
+ goto keepsearching;
+ }
+ }
+ /* Create NFS protocol socket and add it to the list of sockets. */
+ /* N.B. If nfsvers is NFS_VER4 at this point then we're on a non standard port */
+ error = nfs_socket_create(nmp, (struct sockaddr*)&ss, nso->nso_sotype, port,
+ NFS_PROG, nfsvers, NMFLAG(nmp, RESVPORT), &nsonfs);
+ if (error) {
+ nfs_socket_search_update_error(&nss, error);
+ nfs_socket_destroy(nso);
+ goto keepsearching;
+ }
+ nsonfs->nso_location = nso->nso_location;
+ nsonfs->nso_wake = &nss;
+ error = sock_setupcall(nsonfs->nso_so, nfs_connect_upcall, nsonfs);
+ if (error) {
+ nfs_socket_search_update_error(&nss, error);
+ nfs_socket_destroy(nsonfs);
+ nfs_socket_destroy(nso);
+ goto keepsearching;
+ }
+ TAILQ_INSERT_TAIL(&nss.nss_socklist, nsonfs, nso_link);
+ nss.nss_sockcnt++;
+ if ((nfsvers < NFS_VER4) && !(nmp->nm_sockflags & NMSOCK_HASCONNECTED) && !NM_OMATTR_GIVEN(nmp, FH)) {
+ /* Set up socket address and port for MOUNT socket. */
+ error = 0;
+ bcopy(nso->nso_saddr, &ss, nso->nso_saddr->sa_len);
+ port = nmp->nm_mountport;
+ if (ss.ss_family == AF_INET)
+ ((struct sockaddr_in*)&ss)->sin_port = htons(port);
+ else if (ss.ss_family == AF_INET6)
+ ((struct sockaddr_in6*)&ss)->sin6_port = htons(port);
+ if (!port) {
+ /* Get port/sockaddr for MOUNT version corresponding to NFS version. */
+ /* If NFS version is unknown, optimistically choose for NFSv3. */
+ int mntvers = (nfsvers == NFS_VER2) ? RPCMNT_VER1 : RPCMNT_VER3;
+ int mntproto = (NM_OMFLAG(nmp, MNTUDP) || (nso->nso_sotype == SOCK_DGRAM)) ? IPPROTO_UDP : IPPROTO_TCP;
+ error = nfs_portmap_lookup(nmp, vfs_context_current(), (struct sockaddr*)&ss,
+ nso->nso_so, RPCPROG_MNT, mntvers, mntproto, timeo);
+ }
+ if (!error) {
+ if (ss.ss_family == AF_INET)
+ port = ntohs(((struct sockaddr_in*)&ss)->sin_port);
+ else if (ss.ss_family == AF_INET6)
+ port = ntohs(((struct sockaddr_in6*)&ss)->sin6_port);
+ if (!port)
+ error = EPROGUNAVAIL;
+ }
+ /* create sockaddr for MOUNT */
+ if (!error)
+ MALLOC(nsonfs->nso_saddr2, struct sockaddr *, ss.ss_len, M_SONAME, M_WAITOK|M_ZERO);
+ if (!error && !nsonfs->nso_saddr2)
+ error = ENOMEM;
+ if (!error)
+ bcopy(&ss, nsonfs->nso_saddr2, ss.ss_len);
+ if (error) {
+ lck_mtx_lock(&nsonfs->nso_lock);
+ nsonfs->nso_error = error;
+ nsonfs->nso_flags |= NSO_DEAD;
+ lck_mtx_unlock(&nsonfs->nso_lock);
+ }
+ }
+ nfs_socket_destroy(nso);
+ goto keepsearching;
+ }
+
+ /* nso is an NFS socket */
+ NFS_SOCK_DBG("nfs connect %s got NFS socket %p\n", vfs_statfs(nmp->nm_mountp)->f_mntfromname, nso);
+
+ /* If NFS version wasn't specified, it was determined during the connect. */
+ nfsvers = nmp->nm_vers ? nmp->nm_vers : (int)nso->nso_version;
+
+ /* Perform MOUNT call for initial NFSv2/v3 connection/mount. */
+ if ((nfsvers < NFS_VER4) && !(nmp->nm_sockflags & NMSOCK_HASCONNECTED) && !NM_OMATTR_GIVEN(nmp, FH)) {
+ error = 0;
+ saddr = nso->nso_saddr2;
+ if (!saddr) {
+ /* Need sockaddr for MOUNT port */
+ bcopy(nso->nso_saddr, &ss, nso->nso_saddr->sa_len);
+ port = nmp->nm_mountport;
+ if (ss.ss_family == AF_INET)
+ ((struct sockaddr_in*)&ss)->sin_port = htons(port);
+ else if (ss.ss_family == AF_INET6)
+ ((struct sockaddr_in6*)&ss)->sin6_port = htons(port);
+ if (!port) {
+ /* Get port/sockaddr for MOUNT version corresponding to NFS version. */
+ int mntvers = (nfsvers == NFS_VER2) ? RPCMNT_VER1 : RPCMNT_VER3;
+ int mntproto = (NM_OMFLAG(nmp, MNTUDP) || (nso->nso_sotype == SOCK_DGRAM)) ? IPPROTO_UDP : IPPROTO_TCP;
+ error = nfs_portmap_lookup(nmp, vfs_context_current(), (struct sockaddr*)&ss,
+ NULL, RPCPROG_MNT, mntvers, mntproto, timeo);
+ if (ss.ss_family == AF_INET)
+ port = ntohs(((struct sockaddr_in*)&ss)->sin_port);
+ else if (ss.ss_family == AF_INET6)
+ port = ntohs(((struct sockaddr_in6*)&ss)->sin6_port);
+ }
+ if (!error) {
+ if (port)
+ saddr = (struct sockaddr*)&ss;
+ else
+ error = EPROGUNAVAIL;
+ }
+ }
+ if (saddr)
+ MALLOC(fh, fhandle_t *, sizeof(fhandle_t), M_TEMP, M_WAITOK|M_ZERO);
+ if (saddr && fh)
+ MALLOC_ZONE(path, char *, MAXPATHLEN, M_NAMEI, M_WAITOK);
+ if (!saddr || !fh || !path) {
+ if (!error)
+ error = ENOMEM;
+ if (fh)
+ FREE(fh, M_TEMP);
+ if (path)
+ FREE_ZONE(path, MAXPATHLEN, M_NAMEI);
+ fh = NULL;
+ path = NULL;
+ nfs_socket_search_update_error(&nss, error);
+ nfs_socket_destroy(nso);
+ goto keepsearching;
+ }
+ nfs_location_mntfromname(&nmp->nm_locations, nso->nso_location, path, MAXPATHLEN, 1);
+ error = nfs3_mount_rpc(nmp, saddr, nso->nso_sotype, nfsvers,
+ path, vfs_context_current(), timeo, fh, &nmp->nm_servsec);
+ NFS_SOCK_DBG("nfs connect %s socket %p mount %d\n",
+ vfs_statfs(nmp->nm_mountp)->f_mntfromname, nso, error);
+ if (!error) {
+ /* Make sure we can agree on a security flavor. */
+ int o, s; /* indices into mount option and server security flavor lists */
+ int found = 0;
+
+ if ((nfsvers == NFS_VER3) && !nmp->nm_servsec.count) {
+ /* Some servers return an empty list to indicate RPCAUTH_SYS? */
+ nmp->nm_servsec.count = 1;
+ nmp->nm_servsec.flavors[0] = RPCAUTH_SYS;
+ }
+ if (nmp->nm_sec.count) {
+ /* Choose the first flavor in our list that the server supports. */
+ if (!nmp->nm_servsec.count) {
+ /* we don't know what the server supports, just use our first choice */
+ nmp->nm_auth = nmp->nm_sec.flavors[0];
+ found = 1;
+ }
+ for (o=0; !found && (o < nmp->nm_sec.count); o++)
+ for (s=0; !found && (s < nmp->nm_servsec.count); s++)
+ if (nmp->nm_sec.flavors[o] == nmp->nm_servsec.flavors[s]) {
+ nmp->nm_auth = nmp->nm_sec.flavors[o];
+ found = 1;
+ }
+ } else {
+ /* Choose the first one we support from the server's list. */
+ if (!nmp->nm_servsec.count) {
+ nmp->nm_auth = RPCAUTH_SYS;
+ found = 1;
+ }
+ for (s=0; s < nmp->nm_servsec.count; s++)
+ switch (nmp->nm_servsec.flavors[s]) {
+ case RPCAUTH_SYS:
+ /* prefer RPCAUTH_SYS to RPCAUTH_NONE */
+ if (found && (nmp->nm_auth == RPCAUTH_NONE))
+ found = 0;
+ case RPCAUTH_NONE:
+ case RPCAUTH_KRB5:
+ case RPCAUTH_KRB5I:
+ case RPCAUTH_KRB5P:
+ if (!found) {
+ nmp->nm_auth = nmp->nm_servsec.flavors[s];
+ found = 1;
+ }
+ break;
+ }
+ }
+ error = !found ? EAUTH : 0;
+ }
+ FREE_ZONE(path, MAXPATHLEN, M_NAMEI);
+ path = NULL;
+ if (error) {
+ nfs_socket_search_update_error(&nss, error);
+ FREE(fh, M_TEMP);
+ fh = NULL;
+ nfs_socket_destroy(nso);
+ goto keepsearching;
+ }
+ if (nmp->nm_fh)
+ FREE(nmp->nm_fh, M_TEMP);
+ nmp->nm_fh = fh;
+ fh = NULL;
+ NFS_BITMAP_SET(nmp->nm_flags, NFS_MFLAG_CALLUMNT);
+ }
+
+ /* put the real upcall in place */
+ upcall = (nso->nso_sotype == SOCK_STREAM) ? nfs_tcp_rcv : nfs_udp_rcv;
+ error = sock_setupcall(nso->nso_so, upcall, nmp);
+ if (error) {
+ nfs_socket_search_update_error(&nss, error);
+ nfs_socket_destroy(nso);
+ goto keepsearching;
+ }
+
+ if (!(nmp->nm_sockflags & NMSOCK_HASCONNECTED)) {
+ /* set mntfromname to this location */
+ if (!NM_OMATTR_GIVEN(nmp, MNTFROM))
+ nfs_location_mntfromname(&nmp->nm_locations, nso->nso_location,
+ vfs_statfs(nmp->nm_mountp)->f_mntfromname,
+ sizeof(vfs_statfs(nmp->nm_mountp)->f_mntfromname), 0);
+ /* some negotiated values need to remain unchanged for the life of the mount */
+ if (!nmp->nm_sotype)
+ nmp->nm_sotype = nso->nso_sotype;
+ if (!nmp->nm_vers) {
+ nmp->nm_vers = nfsvers;
+ /* If we negotiated NFSv4, set nm_nfsport if we ended up on the standard NFS port */
+ if ((nfsvers >= NFS_VER4) && !NFS_BITMAP_ISSET(nmp->nm_mattrs, NFS_MATTR_NFS_PORT)) {
+ if (nso->nso_saddr->sa_family == AF_INET)
+ port = ((struct sockaddr_in*)nso->nso_saddr)->sin_port = htons(port);
+ else if (nso->nso_saddr->sa_family == AF_INET6)
+ port = ((struct sockaddr_in6*)nso->nso_saddr)->sin6_port = htons(port);
+ else
+ port = 0;
+ if (port == NFS_PORT)
+ nmp->nm_nfsport = NFS_PORT;
+ }
+ }
+ /* do some version-specific pre-mount set up */
+ if (nmp->nm_vers >= NFS_VER4) {
+ microtime(&now);
+ nmp->nm_mounttime = ((uint64_t)now.tv_sec << 32) | now.tv_usec;
+ if (!NMFLAG(nmp, NOCALLBACK))
+ nfs4_mount_callback_setup(nmp);
+ }
+ }
+
+ /* Initialize NFS socket state variables */
+ lck_mtx_lock(&nmp->nm_lock);
+ nmp->nm_srtt[0] = nmp->nm_srtt[1] = nmp->nm_srtt[2] =
+ nmp->nm_srtt[3] = (NFS_TIMEO << 3);
+ nmp->nm_sdrtt[0] = nmp->nm_sdrtt[1] = nmp->nm_sdrtt[2] =
+ nmp->nm_sdrtt[3] = 0;
+ if (nso->nso_sotype == SOCK_DGRAM) {
+ nmp->nm_cwnd = NFS_MAXCWND / 2; /* Initial send window */
+ nmp->nm_sent = 0;
+ } else if (nso->nso_sotype == SOCK_STREAM) {
+ nmp->nm_timeouts = 0;
+ }
+ nmp->nm_sockflags &= ~NMSOCK_CONNECTING;
+ nmp->nm_sockflags |= NMSOCK_SETUP;
+ /* move the socket to the mount structure */
+ nmp->nm_nso = nso;
+ oldsaddr = nmp->nm_saddr;
+ nmp->nm_saddr = nso->nso_saddr;
+ lck_mtx_unlock(&nmp->nm_lock);
+ error = nfs_connect_setup(nmp);
+ lck_mtx_lock(&nmp->nm_lock);
+ nmp->nm_sockflags &= ~NMSOCK_SETUP;
+ if (!error) {
+ nmp->nm_sockflags |= NMSOCK_READY;
+ wakeup(&nmp->nm_sockflags);
+ }
+ if (error) {
+ NFS_SOCK_DBG("nfs connect %s socket %p setup failed %d\n",
+ vfs_statfs(nmp->nm_mountp)->f_mntfromname, nso, error);
+ nfs_socket_search_update_error(&nss, error);
+ nmp->nm_saddr = oldsaddr;
+ if (!(nmp->nm_sockflags & NMSOCK_HASCONNECTED)) {
+ /* undo settings made prior to setup */
+ if (!NFS_BITMAP_ISSET(nmp->nm_mattrs, NFS_MATTR_SOCKET_TYPE))
+ nmp->nm_sotype = 0;
+ if (!NFS_BITMAP_ISSET(nmp->nm_mattrs, NFS_MATTR_NFS_VERSION)) {
+ if (nmp->nm_vers >= NFS_VER4) {
+ if (!NFS_BITMAP_ISSET(nmp->nm_mattrs, NFS_MATTR_NFS_PORT))
+ nmp->nm_nfsport = 0;
+ if (nmp->nm_cbid)
+ nfs4_mount_callback_shutdown(nmp);
+ if (IS_VALID_CRED(nmp->nm_mcred))
+ kauth_cred_unref(&nmp->nm_mcred);
+ bzero(&nmp->nm_un, sizeof(nmp->nm_un));
+ }
+ nmp->nm_vers = 0;
+ }
+ }
+ lck_mtx_unlock(&nmp->nm_lock);
+ nmp->nm_nso = NULL;
+ nfs_socket_destroy(nso);
+ goto keepsearching;
+ }
+
+ /* update current location */
+ if ((nmp->nm_locations.nl_current.nli_flags & NLI_VALID) &&
+ (nmp->nm_locations.nl_current.nli_serv != nso->nso_location.nli_serv)) {
+ /* server has changed, we should initiate failover/recovery */
+ // XXX
+ }
+ nmp->nm_locations.nl_current = nso->nso_location;
+ nmp->nm_locations.nl_current.nli_flags |= NLI_VALID;
+
+ if (!(nmp->nm_sockflags & NMSOCK_HASCONNECTED)) {
+ /* We have now successfully connected... make a note of it. */
+ nmp->nm_sockflags |= NMSOCK_HASCONNECTED;
+ }
+
+ lck_mtx_unlock(&nmp->nm_lock);
+ if (oldsaddr)
+ FREE(oldsaddr, M_SONAME);
+
+ if (nss.nss_flags & NSS_WARNED)
+ log(LOG_INFO, "nfs_connect: socket connect completed for %s\n",
+ vfs_statfs(nmp->nm_mountp)->f_mntfromname);
+
+ nmp->nm_nss = NULL;
+ nfs_socket_search_cleanup(&nss);
+ if (fh)
+ FREE(fh, M_TEMP);
+ if (path)
+ FREE_ZONE(path, MAXPATHLEN, M_NAMEI);
+ NFS_SOCK_DBG("nfs connect %s success\n", vfs_statfs(nmp->nm_mountp)->f_mntfromname);
+ return (0);
+}
+
+
+/* setup & confirm socket connection is functional */
+int
+nfs_connect_setup(struct nfsmount *nmp)
+{
+ int error = 0;
+
+ if (nmp->nm_vers >= NFS_VER4) {
+ if (nmp->nm_state & NFSSTA_CLIENTID) {
+ /* first, try to renew our current state */
+ error = nfs4_renew(nmp, R_SETUP);
+ if ((error == NFSERR_ADMIN_REVOKED) ||
+ (error == NFSERR_CB_PATH_DOWN) ||
+ (error == NFSERR_EXPIRED) ||
+ (error == NFSERR_LEASE_MOVED) ||
+ (error == NFSERR_STALE_CLIENTID)) {
+ lck_mtx_lock(&nmp->nm_lock);
+ nfs_need_recover(nmp, error);
+ lck_mtx_unlock(&nmp->nm_lock);
+ }
+ }
+ error = nfs4_setclientid(nmp);
+ }
+ return (error);
+}
+
+/*
+ * NFS socket reconnect routine:
+ * Called when a connection is broken.
+ * - disconnect the old socket
+ * - nfs_connect() again
+ * - set R_MUSTRESEND for all outstanding requests on mount point
+ * If this fails the mount point is DEAD!
+ */
+int
+nfs_reconnect(struct nfsmount *nmp)
+{
+ struct nfsreq *rq;
+ struct timeval now;
+ thread_t thd = current_thread();
+ int error, wentdown = 0, verbose = 1;
+ time_t lastmsg;
+ int timeo;
+
+ microuptime(&now);
+ lastmsg = now.tv_sec - (nmp->nm_tprintf_delay - nmp->nm_tprintf_initial_delay);
+
+ nfs_disconnect(nmp);
+
+
+ lck_mtx_lock(&nmp->nm_lock);
+ timeo = nfs_is_squishy(nmp) ? 8 : 30;
+ lck_mtx_unlock(&nmp->nm_lock);
+
+ while ((error = nfs_connect(nmp, verbose, timeo))) {
+ verbose = 0;
+ nfs_disconnect(nmp);
+ if ((error == EINTR) || (error == ERESTART))
+ return (EINTR);
+ if (error == EIO)
+ return (EIO);
+ microuptime(&now);
+ if ((lastmsg + nmp->nm_tprintf_delay) < now.tv_sec) {
+ lastmsg = now.tv_sec;
+ nfs_down(nmp, thd, error, NFSSTA_TIMEO, "can not connect", 0);
+ wentdown = 1;
+ }
+ lck_mtx_lock(&nmp->nm_lock);
+ if (!(nmp->nm_state & NFSSTA_MOUNTED)) {
+ /* we're not yet completely mounted and */
+ /* we can't reconnect, so we fail */
+ lck_mtx_unlock(&nmp->nm_lock);
+ NFS_SOCK_DBG("Not mounted returning %d\n", error);
+ return (error);
+ }
+
+ if (nfs_mount_check_dead_timeout(nmp)) {
+ nfs_mount_make_zombie(nmp);
+ lck_mtx_unlock(&nmp->nm_lock);
+ return (ENXIO);
+ }
+
+ if ((error = nfs_sigintr(nmp, NULL, thd, 1))) {
+ lck_mtx_unlock(&nmp->nm_lock);
+ return (error);
+ }
+ lck_mtx_unlock(&nmp->nm_lock);
+ tsleep(nfs_reconnect, PSOCK, "nfs_reconnect_delay", 2*hz);
+ if ((error = nfs_sigintr(nmp, NULL, thd, 0)))
+ return (error);
+ }
+
+ if (wentdown)
+ nfs_up(nmp, thd, NFSSTA_TIMEO, "connected");
+
+ /*
+ * Loop through outstanding request list and mark all requests
+ * as needing a resend. (Though nfs_need_reconnect() probably
+ * marked them all already.)
+ */
+ lck_mtx_lock(nfs_request_mutex);
+ TAILQ_FOREACH(rq, &nfs_reqq, r_chain) {
+ if (rq->r_nmp == nmp) {
+ lck_mtx_lock(&rq->r_mtx);
+ if (!rq->r_error && !rq->r_nmrep.nmc_mhead && !(rq->r_flags & R_MUSTRESEND)) {
+ rq->r_flags |= R_MUSTRESEND;
+ rq->r_rtt = -1;
+ wakeup(rq);
+ if ((rq->r_flags & (R_IOD|R_ASYNC|R_ASYNCWAIT|R_SENDING)) == R_ASYNC)
+ nfs_asyncio_resend(rq);
+ }
+ lck_mtx_unlock(&rq->r_mtx);
+ }
+ }
+ lck_mtx_unlock(nfs_request_mutex);
+ return (0);
+}
+
+/*
+ * NFS disconnect. Clean up and unlink.
+ */
+void
+nfs_disconnect(struct nfsmount *nmp)
+{
+ struct nfs_socket *nso;
+
+ lck_mtx_lock(&nmp->nm_lock);
+tryagain:
+ if (nmp->nm_nso) {
+ struct timespec ts = { 1, 0 };
+ if (nmp->nm_state & NFSSTA_SENDING) { /* wait for sending to complete */
+ nmp->nm_state |= NFSSTA_WANTSND;
+ msleep(&nmp->nm_state, &nmp->nm_lock, PZERO-1, "nfswaitsending", &ts);
+ goto tryagain;
+ }
+ if (nmp->nm_sockflags & NMSOCK_POKE) { /* wait for poking to complete */
+ msleep(&nmp->nm_sockflags, &nmp->nm_lock, PZERO-1, "nfswaitpoke", &ts);
+ goto tryagain;
+ }
+ nmp->nm_sockflags |= NMSOCK_DISCONNECTING;
+ nmp->nm_sockflags &= ~NMSOCK_READY;
+ nso = nmp->nm_nso;
+ nmp->nm_nso = NULL;
+ if (nso->nso_saddr == nmp->nm_saddr)
+ nso->nso_saddr = NULL;
+ lck_mtx_unlock(&nmp->nm_lock);
+ nfs_socket_destroy(nso);
+ lck_mtx_lock(&nmp->nm_lock);
+ nmp->nm_sockflags &= ~NMSOCK_DISCONNECTING;
+ lck_mtx_unlock(&nmp->nm_lock);
+ } else {
+ lck_mtx_unlock(&nmp->nm_lock);
+ }
+}
+
+/*
+ * mark an NFS mount as needing a reconnect/resends.
+ */
+void
+nfs_need_reconnect(struct nfsmount *nmp)
+{
+ struct nfsreq *rq;
+
+ lck_mtx_lock(&nmp->nm_lock);
+ nmp->nm_sockflags &= ~(NMSOCK_READY|NMSOCK_SETUP);
+ lck_mtx_unlock(&nmp->nm_lock);
+
+ /*
+ * Loop through outstanding request list and
+ * mark all requests as needing a resend.
+ */
+ lck_mtx_lock(nfs_request_mutex);
+ TAILQ_FOREACH(rq, &nfs_reqq, r_chain) {
+ if (rq->r_nmp == nmp) {
+ lck_mtx_lock(&rq->r_mtx);
+ if (!rq->r_error && !rq->r_nmrep.nmc_mhead && !(rq->r_flags & R_MUSTRESEND)) {
+ rq->r_flags |= R_MUSTRESEND;
+ rq->r_rtt = -1;
+ wakeup(rq);
+ if ((rq->r_flags & (R_IOD|R_ASYNC|R_ASYNCWAIT|R_SENDING)) == R_ASYNC)
+ nfs_asyncio_resend(rq);
+ }
+ lck_mtx_unlock(&rq->r_mtx);
+ }
+ }
+ lck_mtx_unlock(nfs_request_mutex);
+}
+
+
+/*
+ * thread to handle miscellaneous async NFS socket work (reconnects/resends)
+ */
+void
+nfs_mount_sock_thread(void *arg, __unused wait_result_t wr)
+{
+ struct nfsmount *nmp = arg;
+ struct timespec ts = { 30, 0 };
+ thread_t thd = current_thread();
+ struct nfsreq *req;
+ struct timeval now;
+ int error, dofinish;
+ nfsnode_t np;
+ int do_reconnect_sleep = 0;
+
+ lck_mtx_lock(&nmp->nm_lock);
+ while (!(nmp->nm_sockflags & NMSOCK_READY) ||
+ !TAILQ_EMPTY(&nmp->nm_resendq) ||
+ !LIST_EMPTY(&nmp->nm_monlist) ||
+ nmp->nm_deadto_start ||
+ (nmp->nm_state & NFSSTA_RECOVER) ||
+ ((nmp->nm_vers >= NFS_VER4) && !TAILQ_EMPTY(&nmp->nm_dreturnq)))
+ {
+ if (nmp->nm_sockflags & NMSOCK_UNMOUNT)
+ break;
+ /* do reconnect, if necessary */
+ if (!(nmp->nm_sockflags & NMSOCK_READY) && !(nmp->nm_state & (NFSSTA_FORCE|NFSSTA_DEAD))) {
+ if (nmp->nm_reconnect_start <= 0) {
+ microuptime(&now);
+ nmp->nm_reconnect_start = now.tv_sec;
+ }
+ lck_mtx_unlock(&nmp->nm_lock);
+ NFS_SOCK_DBG("nfs reconnect %s\n", vfs_statfs(nmp->nm_mountp)->f_mntfromname);
+ /*
+ * XXX We don't want to call reconnect again right away if returned errors
+ * before that may not have blocked. This has caused spamming null procs
+ * from machines in the pass.
+ */
+ if (do_reconnect_sleep)
+ tsleep(nfs_mount_sock_thread, PSOCK, "nfs_reconnect_sock_thread_delay", hz);
+ error = nfs_reconnect(nmp);
+ if (error) {
+ int lvl = 7;
+ if (error == EIO || error == EINTR) {
+ lvl = (do_reconnect_sleep++ % 600) ? 7 : 0;
+ }
+ nfs_printf(NFS_FAC_SOCK, lvl, "nfs reconnect %s: returned %d\n",
+ vfs_statfs(nmp->nm_mountp)->f_mntfromname, error);
+ } else {
+ nmp->nm_reconnect_start = 0;
+ do_reconnect_sleep = 0;
+ }
+ lck_mtx_lock(&nmp->nm_lock);
+ }
+ if ((nmp->nm_sockflags & NMSOCK_READY) &&
+ (nmp->nm_state & NFSSTA_RECOVER) &&
+ !(nmp->nm_sockflags & NMSOCK_UNMOUNT) &&
+ !(nmp->nm_state & (NFSSTA_FORCE|NFSSTA_DEAD))) {
+ /* perform state recovery */
+ lck_mtx_unlock(&nmp->nm_lock);
+ nfs_recover(nmp);
+ lck_mtx_lock(&nmp->nm_lock);
+ }
+ /* handle NFSv4 delegation returns */
+ while ((nmp->nm_vers >= NFS_VER4) && !(nmp->nm_state & (NFSSTA_FORCE|NFSSTA_DEAD)) &&
+ (nmp->nm_sockflags & NMSOCK_READY) && !(nmp->nm_state & NFSSTA_RECOVER) &&
+ ((np = TAILQ_FIRST(&nmp->nm_dreturnq)))) {
+ lck_mtx_unlock(&nmp->nm_lock);
+ nfs4_delegation_return(np, R_RECOVER, thd, nmp->nm_mcred);
+ lck_mtx_lock(&nmp->nm_lock);
+ }
+ /* do resends, if necessary/possible */
+ while ((((nmp->nm_sockflags & NMSOCK_READY) && !(nmp->nm_state & NFSSTA_RECOVER)) ||
+ (nmp->nm_state & (NFSSTA_FORCE|NFSSTA_DEAD))) &&
+ ((req = TAILQ_FIRST(&nmp->nm_resendq)))) {
+ if (req->r_resendtime)
+ microuptime(&now);
+ while (req && !(nmp->nm_state & (NFSSTA_FORCE|NFSSTA_DEAD)) && req->r_resendtime && (now.tv_sec < req->r_resendtime))
+ req = TAILQ_NEXT(req, r_rchain);
+ if (!req)
+ break;
+ TAILQ_REMOVE(&nmp->nm_resendq, req, r_rchain);
+ req->r_rchain.tqe_next = NFSREQNOLIST;
+ lck_mtx_unlock(&nmp->nm_lock);
+ lck_mtx_lock(&req->r_mtx);
+ /* Note that we have a reference on the request that was taken nfs_asyncio_resend */
+ if (req->r_error || req->r_nmrep.nmc_mhead) {
+ dofinish = req->r_callback.rcb_func && !(req->r_flags & R_WAITSENT);
+ req->r_flags &= ~R_RESENDQ;
+ wakeup(req);
+ lck_mtx_unlock(&req->r_mtx);
+ if (dofinish)
+ nfs_asyncio_finish(req);
+ nfs_request_rele(req);
+ lck_mtx_lock(&nmp->nm_lock);
+ continue;
+ }
+ if ((req->r_flags & R_RESTART) || nfs_request_using_gss(req)) {
+ req->r_flags &= ~R_RESTART;
+ req->r_resendtime = 0;
+ lck_mtx_unlock(&req->r_mtx);
+ /* async RPCs on GSS mounts need to be rebuilt and resent. */
+ nfs_reqdequeue(req);
+ if (nfs_request_using_gss(req)) {
+ nfs_gss_clnt_rpcdone(req);
+ error = nfs_gss_clnt_args_restore(req);
+ if (error == ENEEDAUTH)
+ req->r_xid = 0;
+ }
+ NFS_SOCK_DBG("nfs async%s restart: p %d x 0x%llx f 0x%x rtt %d\n",
+ nfs_request_using_gss(req) ? " gss" : "", req->r_procnum, req->r_xid,
+ req->r_flags, req->r_rtt);
+ error = nfs_sigintr(nmp, req, req->r_thread, 0);
+ if (!error)
+ error = nfs_request_add_header(req);
+ if (!error)
+ error = nfs_request_send(req, 0);
+ lck_mtx_lock(&req->r_mtx);
+ if (req->r_flags & R_RESENDQ)
+ req->r_flags &= ~R_RESENDQ;
+ if (error)
+ req->r_error = error;
+ wakeup(req);
+ dofinish = error && req->r_callback.rcb_func && !(req->r_flags & R_WAITSENT);
+ lck_mtx_unlock(&req->r_mtx);
+ if (dofinish)
+ nfs_asyncio_finish(req);
+ nfs_request_rele(req);
+ lck_mtx_lock(&nmp->nm_lock);
+ error = 0;
+ continue;
+ }
+ NFS_SOCK_DBG("nfs async resend: p %d x 0x%llx f 0x%x rtt %d\n",
+ req->r_procnum, req->r_xid, req->r_flags, req->r_rtt);
+ error = nfs_sigintr(nmp, req, req->r_thread, 0);
+ if (!error) {
+ req->r_flags |= R_SENDING;
+ lck_mtx_unlock(&req->r_mtx);
+ error = nfs_send(req, 0);
+ lck_mtx_lock(&req->r_mtx);
+ if (!error) {
+ if (req->r_flags & R_RESENDQ)
+ req->r_flags &= ~R_RESENDQ;
+ wakeup(req);
+ lck_mtx_unlock(&req->r_mtx);
+ nfs_request_rele(req);
+ lck_mtx_lock(&nmp->nm_lock);
+ continue;
+ }
+ }
+ req->r_error = error;
+ if (req->r_flags & R_RESENDQ)
+ req->r_flags &= ~R_RESENDQ;
+ wakeup(req);
+ dofinish = req->r_callback.rcb_func && !(req->r_flags & R_WAITSENT);
+ lck_mtx_unlock(&req->r_mtx);
+ if (dofinish)
+ nfs_asyncio_finish(req);
+ nfs_request_rele(req);
+ lck_mtx_lock(&nmp->nm_lock);
+ }
+ if (nfs_mount_check_dead_timeout(nmp)) {
+ nfs_mount_make_zombie(nmp);
+ break;
+ }
+
+ if (nmp->nm_state & (NFSSTA_FORCE|NFSSTA_DEAD))
+ break;
+ /* check monitored nodes, if necessary/possible */
+ if (!LIST_EMPTY(&nmp->nm_monlist)) {
+ nmp->nm_state |= NFSSTA_MONITOR_SCAN;
+ LIST_FOREACH(np, &nmp->nm_monlist, n_monlink) {
+ if (!(nmp->nm_sockflags & NMSOCK_READY) ||
+ (nmp->nm_state & (NFSSTA_RECOVER|NFSSTA_UNMOUNTING|NFSSTA_FORCE|NFSSTA_DEAD)))
+ break;
+ np->n_mflag |= NMMONSCANINPROG;
+ lck_mtx_unlock(&nmp->nm_lock);
+ error = nfs_getattr(np, NULL, vfs_context_kernel(), (NGA_UNCACHED|NGA_MONITOR));
+ if (!error && ISSET(np->n_flag, NUPDATESIZE)) /* update quickly to avoid multiple events */
+ nfs_data_update_size(np, 0);
+ lck_mtx_lock(&nmp->nm_lock);
+ np->n_mflag &= ~NMMONSCANINPROG;
+ if (np->n_mflag & NMMONSCANWANT) {
+ np->n_mflag &= ~NMMONSCANWANT;
+ wakeup(&np->n_mflag);
+ }
+ if (error || !(nmp->nm_sockflags & NMSOCK_READY) ||
+ (nmp->nm_state & (NFSSTA_RECOVER|NFSSTA_UNMOUNTING|NFSSTA_FORCE|NFSSTA_DEAD)))
+ break;
+ }
+ nmp->nm_state &= ~NFSSTA_MONITOR_SCAN;
+ if (nmp->nm_state & NFSSTA_UNMOUNTING)
+ wakeup(&nmp->nm_state); /* let unmounting thread know scan is done */
+ }
+ if ((nmp->nm_sockflags & NMSOCK_READY) || (nmp->nm_state & (NFSSTA_RECOVER|NFSSTA_UNMOUNTING))) {
+ if (nmp->nm_deadto_start || !TAILQ_EMPTY(&nmp->nm_resendq) ||
+ (nmp->nm_state & NFSSTA_RECOVER))
+ ts.tv_sec = 1;
+ else
+ ts.tv_sec = 5;
+ msleep(&nmp->nm_sockthd, &nmp->nm_lock, PSOCK, "nfssockthread", &ts);
+ }
+ }
+
+ /* If we're unmounting, send the unmount RPC, if requested/appropriate. */
+ if ((nmp->nm_sockflags & NMSOCK_UNMOUNT) &&
+ (nmp->nm_state & NFSSTA_MOUNTED) && NMFLAG(nmp, CALLUMNT) &&
+ (nmp->nm_vers < NFS_VER4) && !(nmp->nm_state & (NFSSTA_FORCE|NFSSTA_DEAD))) {
+ lck_mtx_unlock(&nmp->nm_lock);
+ nfs3_umount_rpc(nmp, vfs_context_kernel(),
+ (nmp->nm_sockflags & NMSOCK_READY) ? 6 : 2);
+ lck_mtx_lock(&nmp->nm_lock);
+ }
+
+ if (nmp->nm_sockthd == thd)
+ nmp->nm_sockthd = NULL;
+ lck_mtx_unlock(&nmp->nm_lock);
+ wakeup(&nmp->nm_sockthd);
+ thread_terminate(thd);
+}
+
+/* start or wake a mount's socket thread */
+void
+nfs_mount_sock_thread_wake(struct nfsmount *nmp)
+{
+ if (nmp->nm_sockthd)
+ wakeup(&nmp->nm_sockthd);
+ else if (kernel_thread_start(nfs_mount_sock_thread, nmp, &nmp->nm_sockthd) == KERN_SUCCESS)
+ thread_deallocate(nmp->nm_sockthd);
+}
+
+/*
+ * Check if we should mark the mount dead because the
+ * unresponsive mount has reached the dead timeout.
+ * (must be called with nmp locked)
+ */
+int
+nfs_mount_check_dead_timeout(struct nfsmount *nmp)
+{
+ struct timeval now;
+
+ if (nmp->nm_state & NFSSTA_DEAD)
+ return 1;
+ if (nmp->nm_deadto_start == 0)
+ return 0;
+ nfs_is_squishy(nmp);
+ if (nmp->nm_curdeadtimeout <= 0)
+ return 0;
+ microuptime(&now);
+ if ((now.tv_sec - nmp->nm_deadto_start) < nmp->nm_curdeadtimeout)
+ return 0;
+ return 1;
+}
+
+/*
+ * Call nfs_mount_zombie to remove most of the
+ * nfs state for the mount, and then ask to be forcibly unmounted.
+ *
+ * Assumes the nfs mount structure lock nm_lock is held.
+ */
+
+void
+nfs_mount_make_zombie(struct nfsmount *nmp)
+{
+ fsid_t fsid;
+
+ if (!nmp)
+ return;
+
+ if (nmp->nm_state & NFSSTA_DEAD)
+ return;
+
+ printf("nfs server %s: %sdead\n", vfs_statfs(nmp->nm_mountp)->f_mntfromname,
+ (nmp->nm_curdeadtimeout != nmp->nm_deadtimeout) ? "squished " : "");
+ fsid = vfs_statfs(nmp->nm_mountp)->f_fsid;
+ lck_mtx_unlock(&nmp->nm_lock);
+ nfs_mount_zombie(nmp, NFSSTA_DEAD);
+ vfs_event_signal(&fsid, VQ_DEAD, 0);
+ lck_mtx_lock(&nmp->nm_lock);
+}
+
+
+/*
+ * NFS callback channel socket state
+ */
+struct nfs_callback_socket
+{
+ TAILQ_ENTRY(nfs_callback_socket) ncbs_link;
+ socket_t ncbs_so; /* the socket */
+ struct sockaddr_storage ncbs_saddr; /* socket address */
+ struct nfs_rpc_record_state ncbs_rrs; /* RPC record parsing state */
+ time_t ncbs_stamp; /* last accessed at */
+ uint32_t ncbs_flags; /* see below */
+};
+#define NCBSOCK_UPCALL 0x0001
+#define NCBSOCK_UPCALLWANT 0x0002
+#define NCBSOCK_DEAD 0x0004
+
+/*
+ * NFS callback channel state
+ *
+ * One listening socket for accepting socket connections from servers and
+ * a list of connected sockets to handle callback requests on.
+ * Mounts registered with the callback channel are assigned IDs and
+ * put on a list so that the callback request handling code can match
+ * the requests up with mounts.
+ */
+socket_t nfs4_cb_so = NULL;
+socket_t nfs4_cb_so6 = NULL;
+in_port_t nfs4_cb_port = 0;
+in_port_t nfs4_cb_port6 = 0;
+uint32_t nfs4_cb_id = 0;
+uint32_t nfs4_cb_so_usecount = 0;
+TAILQ_HEAD(nfs4_cb_sock_list,nfs_callback_socket) nfs4_cb_socks;
+TAILQ_HEAD(nfs4_cb_mount_list,nfsmount) nfs4_cb_mounts;
+
+int nfs4_cb_handler(struct nfs_callback_socket *, mbuf_t);
+
+/*
+ * Set up the callback channel for the NFS mount.
+ *
+ * Initializes the callback channel socket state and
+ * assigns a callback ID to the mount.
+ */
+void
+nfs4_mount_callback_setup(struct nfsmount *nmp)
+{
+ struct sockaddr_in sin;
+ struct sockaddr_in6 sin6;
+ socket_t so = NULL;
+ socket_t so6 = NULL;
+ struct timeval timeo;
+ int error, on = 1;
+ in_port_t port;
+
+ lck_mtx_lock(nfs_global_mutex);
+ if (nfs4_cb_id == 0) {
+ TAILQ_INIT(&nfs4_cb_mounts);
+ TAILQ_INIT(&nfs4_cb_socks);
+ nfs4_cb_id++;
+ }
+ nmp->nm_cbid = nfs4_cb_id++;
+ if (nmp->nm_cbid == 0)
+ nmp->nm_cbid = nfs4_cb_id++;
+ nfs4_cb_so_usecount++;
+ TAILQ_INSERT_HEAD(&nfs4_cb_mounts, nmp, nm_cblink);
+
+ if (nfs4_cb_so) {
+ lck_mtx_unlock(nfs_global_mutex);
+ return;
+ }
+
+ /* IPv4 */
+ error = sock_socket(AF_INET, SOCK_STREAM, IPPROTO_TCP, nfs4_cb_accept, NULL, &nfs4_cb_so);
+ if (error) {
+ log(LOG_INFO, "nfs callback setup: error %d creating listening IPv4 socket\n", error);
+ goto fail;
+ }
+ so = nfs4_cb_so;
+
+ sock_setsockopt(so, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
+ sin.sin_len = sizeof(struct sockaddr_in);
+ sin.sin_family = AF_INET;
+ sin.sin_addr.s_addr = htonl(INADDR_ANY);
+ sin.sin_port = htons(nfs_callback_port); /* try to use specified port */
+ error = sock_bind(so, (struct sockaddr *)&sin);
+ if (error) {
+ log(LOG_INFO, "nfs callback setup: error %d binding listening IPv4 socket\n", error);
+ goto fail;
+ }
+ error = sock_getsockname(so, (struct sockaddr *)&sin, sin.sin_len);
+ if (error) {
+ log(LOG_INFO, "nfs callback setup: error %d getting listening IPv4 socket port\n", error);
+ goto fail;
+ }
+ nfs4_cb_port = ntohs(sin.sin_port);
+
+ error = sock_listen(so, 32);
+ if (error) {
+ log(LOG_INFO, "nfs callback setup: error %d on IPv4 listen\n", error);
+ goto fail;
+ }
+
+ /* receive timeout shouldn't matter. If timeout on send, we'll want to drop the socket */
+ timeo.tv_usec = 0;
+ timeo.tv_sec = 60;
+ error = sock_setsockopt(so, SOL_SOCKET, SO_RCVTIMEO, &timeo, sizeof(timeo));
+ if (error)
+ log(LOG_INFO, "nfs callback setup: error %d setting IPv4 socket rx timeout\n", error);
+ error = sock_setsockopt(so, SOL_SOCKET, SO_SNDTIMEO, &timeo, sizeof(timeo));
+ if (error)
+ log(LOG_INFO, "nfs callback setup: error %d setting IPv4 socket tx timeout\n", error);
+ sock_setsockopt(so, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on));
+ sock_setsockopt(so, SOL_SOCKET, SO_NOADDRERR, &on, sizeof(on));
+ sock_setsockopt(so, SOL_SOCKET, SO_UPCALLCLOSEWAIT, &on, sizeof(on));
+ error = 0;
+
+ /* IPv6 */
+ error = sock_socket(AF_INET6, SOCK_STREAM, IPPROTO_TCP, nfs4_cb_accept, NULL, &nfs4_cb_so6);
+ if (error) {
+ log(LOG_INFO, "nfs callback setup: error %d creating listening IPv6 socket\n", error);
+ goto fail;
+ }
+ so6 = nfs4_cb_so6;
+
+ sock_setsockopt(so6, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
+ sock_setsockopt(so6, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof(on));
+ /* try to use specified port or same port as IPv4 */
+ port = nfs_callback_port ? nfs_callback_port : nfs4_cb_port;
+ipv6_bind_again:
+ sin6.sin6_len = sizeof(struct sockaddr_in6);
+ sin6.sin6_family = AF_INET6;
+ sin6.sin6_addr = in6addr_any;
+ sin6.sin6_port = htons(port);
+ error = sock_bind(so6, (struct sockaddr *)&sin6);
+ if (error) {
+ if (port != nfs_callback_port) {
+ /* if we simply tried to match the IPv4 port, then try any port */
+ port = 0;
+ goto ipv6_bind_again;
+ }
+ log(LOG_INFO, "nfs callback setup: error %d binding listening IPv6 socket\n", error);
+ goto fail;
+ }
+ error = sock_getsockname(so6, (struct sockaddr *)&sin6, sin6.sin6_len);
+ if (error) {
+ log(LOG_INFO, "nfs callback setup: error %d getting listening IPv6 socket port\n", error);
+ goto fail;
+ }
+ nfs4_cb_port6 = ntohs(sin6.sin6_port);
+
+ error = sock_listen(so6, 32);
+ if (error) {
+ log(LOG_INFO, "nfs callback setup: error %d on IPv6 listen\n", error);
+ goto fail;
+ }
+
+ /* receive timeout shouldn't matter. If timeout on send, we'll want to drop the socket */
+ timeo.tv_usec = 0;
+ timeo.tv_sec = 60;
+ error = sock_setsockopt(so6, SOL_SOCKET, SO_RCVTIMEO, &timeo, sizeof(timeo));
+ if (error)
+ log(LOG_INFO, "nfs callback setup: error %d setting IPv6 socket rx timeout\n", error);
+ error = sock_setsockopt(so6, SOL_SOCKET, SO_SNDTIMEO, &timeo, sizeof(timeo));
+ if (error)
+ log(LOG_INFO, "nfs callback setup: error %d setting IPv6 socket tx timeout\n", error);
+ sock_setsockopt(so6, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on));
+ sock_setsockopt(so6, SOL_SOCKET, SO_NOADDRERR, &on, sizeof(on));
+ sock_setsockopt(so6, SOL_SOCKET, SO_UPCALLCLOSEWAIT, &on, sizeof(on));
+ error = 0;
+
+fail:
+ if (error) {
+ nfs4_cb_so = nfs4_cb_so6 = NULL;
+ lck_mtx_unlock(nfs_global_mutex);
+ if (so) {
+ sock_shutdown(so, SHUT_RDWR);
+ sock_close(so);
+ }
+ if (so6) {
+ sock_shutdown(so6, SHUT_RDWR);
+ sock_close(so6);
+ }
+ } else {
+ lck_mtx_unlock(nfs_global_mutex);
+ }
+}
+
+/*
+ * Shut down the callback channel for the NFS mount.
+ *
+ * Clears the mount's callback ID and releases the mounts
+ * reference on the callback socket. Last reference dropped
+ * will also shut down the callback socket(s).
+ */
+void
+nfs4_mount_callback_shutdown(struct nfsmount *nmp)
+{
+ struct nfs_callback_socket *ncbsp;
+ socket_t so, so6;
+ struct nfs4_cb_sock_list cb_socks;
+ struct timespec ts = {1,0};
+
+ lck_mtx_lock(nfs_global_mutex);
+ TAILQ_REMOVE(&nfs4_cb_mounts, nmp, nm_cblink);
+ /* wait for any callbacks in progress to complete */
+ while (nmp->nm_cbrefs)
+ msleep(&nmp->nm_cbrefs, nfs_global_mutex, PSOCK, "cbshutwait", &ts);
+ nmp->nm_cbid = 0;
+ if (--nfs4_cb_so_usecount) {
+ lck_mtx_unlock(nfs_global_mutex);
+ return;
+ }
+ so = nfs4_cb_so;
+ so6 = nfs4_cb_so6;
+ nfs4_cb_so = nfs4_cb_so6 = NULL;
+ TAILQ_INIT(&cb_socks);
+ TAILQ_CONCAT(&cb_socks, &nfs4_cb_socks, ncbs_link);
+ lck_mtx_unlock(nfs_global_mutex);
+ if (so) {
+ sock_shutdown(so, SHUT_RDWR);
+ sock_close(so);
+ }
+ if (so6) {
+ sock_shutdown(so6, SHUT_RDWR);
+ sock_close(so6);
+ }
+ while ((ncbsp = TAILQ_FIRST(&cb_socks))) {
+ TAILQ_REMOVE(&cb_socks, ncbsp, ncbs_link);
+ sock_shutdown(ncbsp->ncbs_so, SHUT_RDWR);
+ sock_close(ncbsp->ncbs_so);
+ nfs_rpc_record_state_cleanup(&ncbsp->ncbs_rrs);
+ FREE(ncbsp, M_TEMP);
+ }
+}
+
+/*
+ * Check periodically for stale/unused nfs callback sockets
+ */
+#define NFS4_CB_TIMER_PERIOD 30
+#define NFS4_CB_IDLE_MAX 300
+void
+nfs4_callback_timer(__unused void *param0, __unused void *param1)
+{
+ struct nfs_callback_socket *ncbsp, *nextncbsp;
+ struct timeval now;
+
+loop:
+ lck_mtx_lock(nfs_global_mutex);
+ if (TAILQ_EMPTY(&nfs4_cb_socks)) {
+ nfs4_callback_timer_on = 0;
+ lck_mtx_unlock(nfs_global_mutex);
+ return;
+ }
+ microuptime(&now);
+ TAILQ_FOREACH_SAFE(ncbsp, &nfs4_cb_socks, ncbs_link, nextncbsp) {
+ if (!(ncbsp->ncbs_flags & NCBSOCK_DEAD) &&
+ (now.tv_sec < (ncbsp->ncbs_stamp + NFS4_CB_IDLE_MAX)))
+ continue;
+ TAILQ_REMOVE(&nfs4_cb_socks, ncbsp, ncbs_link);
+ lck_mtx_unlock(nfs_global_mutex);
+ sock_shutdown(ncbsp->ncbs_so, SHUT_RDWR);
+ sock_close(ncbsp->ncbs_so);
+ nfs_rpc_record_state_cleanup(&ncbsp->ncbs_rrs);
+ FREE(ncbsp, M_TEMP);
+ goto loop;
+ }
+ nfs4_callback_timer_on = 1;
+ nfs_interval_timer_start(nfs4_callback_timer_call,
+ NFS4_CB_TIMER_PERIOD * 1000);
+ lck_mtx_unlock(nfs_global_mutex);
+}
+
+/*
+ * Accept a new callback socket.
+ */
+void
+nfs4_cb_accept(socket_t so, __unused void *arg, __unused int waitflag)
+{
+ socket_t newso = NULL;
+ struct nfs_callback_socket *ncbsp;
+ struct nfsmount *nmp;
+ struct timeval timeo, now;
+ int error, on = 1, ip;
+
+ if (so == nfs4_cb_so)
+ ip = 4;
+ else if (so == nfs4_cb_so6)
+ ip = 6;
+ else
+ return;
+
+ /* allocate/initialize a new nfs_callback_socket */
+ MALLOC(ncbsp, struct nfs_callback_socket *, sizeof(struct nfs_callback_socket), M_TEMP, M_WAITOK);
+ if (!ncbsp) {
+ log(LOG_ERR, "nfs callback accept: no memory for new socket\n");
+ return;
+ }
+ bzero(ncbsp, sizeof(*ncbsp));
+ ncbsp->ncbs_saddr.ss_len = (ip == 4) ? sizeof(struct sockaddr_in) : sizeof(struct sockaddr_in6);
+ nfs_rpc_record_state_init(&ncbsp->ncbs_rrs);
+
+ /* accept a new socket */
+ error = sock_accept(so, (struct sockaddr*)&ncbsp->ncbs_saddr,
+ ncbsp->ncbs_saddr.ss_len, MSG_DONTWAIT,
+ nfs4_cb_rcv, ncbsp, &newso);
+ if (error) {
+ log(LOG_INFO, "nfs callback accept: error %d accepting IPv%d socket\n", error, ip);
+ FREE(ncbsp, M_TEMP);
+ return;
+ }
+
+ /* set up the new socket */
+ /* receive timeout shouldn't matter. If timeout on send, we'll want to drop the socket */
+ timeo.tv_usec = 0;
+ timeo.tv_sec = 60;
+ error = sock_setsockopt(newso, SOL_SOCKET, SO_RCVTIMEO, &timeo, sizeof(timeo));
+ if (error)
+ log(LOG_INFO, "nfs callback socket: error %d setting IPv%d socket rx timeout\n", error, ip);
+ error = sock_setsockopt(newso, SOL_SOCKET, SO_SNDTIMEO, &timeo, sizeof(timeo));
+ if (error)
+ log(LOG_INFO, "nfs callback socket: error %d setting IPv%d socket tx timeout\n", error, ip);
+ sock_setsockopt(newso, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on));
+ sock_setsockopt(newso, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
+ sock_setsockopt(newso, SOL_SOCKET, SO_NOADDRERR, &on, sizeof(on));
+ sock_setsockopt(newso, SOL_SOCKET, SO_UPCALLCLOSEWAIT, &on, sizeof(on));
+
+ ncbsp->ncbs_so = newso;
+ microuptime(&now);
+ ncbsp->ncbs_stamp = now.tv_sec;
+
+ lck_mtx_lock(nfs_global_mutex);
+
+ /* add it to the list */
+ TAILQ_INSERT_HEAD(&nfs4_cb_socks, ncbsp, ncbs_link);
+
+ /* verify it's from a host we have mounted */
+ TAILQ_FOREACH(nmp, &nfs4_cb_mounts, nm_cblink) {
+ /* check if socket's source address matches this mount's server address */
+ if (!nmp->nm_saddr)
+ continue;
+ if (nfs_sockaddr_cmp((struct sockaddr*)&ncbsp->ncbs_saddr, nmp->nm_saddr) == 0)
+ break;
+ }
+ if (!nmp) /* we don't want this socket, mark it dead */
+ ncbsp->ncbs_flags |= NCBSOCK_DEAD;
+
+ /* make sure the callback socket cleanup timer is running */
+ /* (shorten the timer if we've got a socket we don't want) */
+ if (!nfs4_callback_timer_on) {
+ nfs4_callback_timer_on = 1;
+ nfs_interval_timer_start(nfs4_callback_timer_call,
+ !nmp ? 500 : (NFS4_CB_TIMER_PERIOD * 1000));
+ } else if (!nmp && (nfs4_callback_timer_on < 2)) {
+ nfs4_callback_timer_on = 2;
+ thread_call_cancel(nfs4_callback_timer_call);
+ nfs_interval_timer_start(nfs4_callback_timer_call, 500);
+ }
+
+ lck_mtx_unlock(nfs_global_mutex);
+}
+
+/*
+ * Receive mbufs from callback sockets into RPC records and process each record.
+ * Detect connection has been closed and shut down.
+ */
+void
+nfs4_cb_rcv(socket_t so, void *arg, __unused int waitflag)
+{
+ struct nfs_callback_socket *ncbsp = arg;
+ struct timespec ts = {1,0};
+ struct timeval now;
+ mbuf_t m;
+ int error = 0, recv = 1;
+
+ lck_mtx_lock(nfs_global_mutex);
+ while (ncbsp->ncbs_flags & NCBSOCK_UPCALL) {
+ /* wait if upcall is already in progress */
+ ncbsp->ncbs_flags |= NCBSOCK_UPCALLWANT;
+ msleep(ncbsp, nfs_global_mutex, PSOCK, "cbupcall", &ts);
+ }
+ ncbsp->ncbs_flags |= NCBSOCK_UPCALL;
+ lck_mtx_unlock(nfs_global_mutex);
+
+ /* loop while we make error-free progress */
+ while (!error && recv) {
+ error = nfs_rpc_record_read(so, &ncbsp->ncbs_rrs, MSG_DONTWAIT, &recv, &m);
+ if (m) /* handle the request */
+ error = nfs4_cb_handler(ncbsp, m);
+ }
+
+ /* note: no error and no data indicates server closed its end */
+ if ((error != EWOULDBLOCK) && (error || !recv)) {
+ /*
+ * Socket is either being closed or should be.
+ * We can't close the socket in the context of the upcall.
+ * So we mark it as dead and leave it for the cleanup timer to reap.
+ */
+ ncbsp->ncbs_stamp = 0;
+ ncbsp->ncbs_flags |= NCBSOCK_DEAD;
+ } else {
+ microuptime(&now);
+ ncbsp->ncbs_stamp = now.tv_sec;
+ }
+
+ lck_mtx_lock(nfs_global_mutex);
+ ncbsp->ncbs_flags &= ~NCBSOCK_UPCALL;
+ lck_mtx_unlock(nfs_global_mutex);
+ wakeup(ncbsp);
+}
+
+/*
+ * Handle an NFS callback channel request.
+ */
+int
+nfs4_cb_handler(struct nfs_callback_socket *ncbsp, mbuf_t mreq)
+{
+ socket_t so = ncbsp->ncbs_so;
+ struct nfsm_chain nmreq, nmrep;
+ mbuf_t mhead = NULL, mrest = NULL, m;
+ struct msghdr msg;
+ struct nfsmount *nmp;
+ fhandle_t fh;
+ nfsnode_t np;
+ nfs_stateid stateid;
+ uint32_t bitmap[NFS_ATTR_BITMAP_LEN], rbitmap[NFS_ATTR_BITMAP_LEN], bmlen, truncate, attrbytes;
+ uint32_t val, xid, procnum, taglen, cbid, numops, op, status;
+ uint32_t auth_type, auth_len;
+ uint32_t numres, *pnumres;
+ int error = 0, replen, len;
+ size_t sentlen = 0;
+
+ xid = numops = op = status = procnum = taglen = cbid = 0;
+
+ nfsm_chain_dissect_init(error, &nmreq, mreq);
+ nfsm_chain_get_32(error, &nmreq, xid); // RPC XID
+ nfsm_chain_get_32(error, &nmreq, val); // RPC Call
+ nfsm_assert(error, (val == RPC_CALL), EBADRPC);
+ nfsm_chain_get_32(error, &nmreq, val); // RPC Version
+ nfsm_assert(error, (val == RPC_VER2), ERPCMISMATCH);
+ nfsm_chain_get_32(error, &nmreq, val); // RPC Program Number
+ nfsm_assert(error, (val == NFS4_CALLBACK_PROG), EPROGUNAVAIL);
+ nfsm_chain_get_32(error, &nmreq, val); // NFS Callback Program Version Number
+ nfsm_assert(error, (val == NFS4_CALLBACK_PROG_VERSION), EPROGMISMATCH);
+ nfsm_chain_get_32(error, &nmreq, procnum); // NFS Callback Procedure Number
+ nfsm_assert(error, (procnum <= NFSPROC4_CB_COMPOUND), EPROCUNAVAIL);
+
+ /* Handle authentication */
+ /* XXX just ignore auth for now - handling kerberos may be tricky */
+ nfsm_chain_get_32(error, &nmreq, auth_type); // RPC Auth Flavor
+ nfsm_chain_get_32(error, &nmreq, auth_len); // RPC Auth Length
+ nfsm_assert(error, (auth_len <= RPCAUTH_MAXSIZ), EBADRPC);
+ if (!error && (auth_len > 0))
+ nfsm_chain_adv(error, &nmreq, nfsm_rndup(auth_len));
+ nfsm_chain_adv(error, &nmreq, NFSX_UNSIGNED); // verifier flavor (should be AUTH_NONE)
+ nfsm_chain_get_32(error, &nmreq, auth_len); // verifier length
+ nfsm_assert(error, (auth_len <= RPCAUTH_MAXSIZ), EBADRPC);
+ if (!error && (auth_len > 0))
+ nfsm_chain_adv(error, &nmreq, nfsm_rndup(auth_len));
+ if (error) {
+ status = error;
+ error = 0;
+ goto nfsmout;
+ }
+
+ switch (procnum) {
+ case NFSPROC4_CB_NULL:
+ status = NFSERR_RETVOID;
+ break;
+ case NFSPROC4_CB_COMPOUND:
+ /* tag, minorversion, cb ident, numops, op array */
+ nfsm_chain_get_32(error, &nmreq, taglen); /* tag length */
+ nfsm_assert(error, (val <= NFS4_OPAQUE_LIMIT), EBADRPC);
+
+ /* start building the body of the response */
+ nfsm_mbuf_get(error, &mrest, nfsm_rndup(taglen) + 5*NFSX_UNSIGNED);
+ nfsm_chain_init(&nmrep, mrest);
+
+ /* copy tag from request to response */
+ nfsm_chain_add_32(error, &nmrep, taglen); /* tag length */
+ for (len = (int)taglen; !error && (len > 0); len -= NFSX_UNSIGNED) {
+ nfsm_chain_get_32(error, &nmreq, val);
+ nfsm_chain_add_32(error, &nmrep, val);
+ }
+
+ /* insert number of results placeholder */
+ numres = 0;
+ nfsm_chain_add_32(error, &nmrep, numres);
+ pnumres = (uint32_t*)(nmrep.nmc_ptr - NFSX_UNSIGNED);
+
+ nfsm_chain_get_32(error, &nmreq, val); /* minorversion */
+ nfsm_assert(error, (val == 0), NFSERR_MINOR_VERS_MISMATCH);
+ nfsm_chain_get_32(error, &nmreq, cbid); /* callback ID */
+ nfsm_chain_get_32(error, &nmreq, numops); /* number of operations */
+ if (error) {
+ if ((error == EBADRPC) || (error == NFSERR_MINOR_VERS_MISMATCH))
+ status = error;
+ else if ((error == ENOBUFS) || (error == ENOMEM))
+ status = NFSERR_RESOURCE;
+ else
+ status = NFSERR_SERVERFAULT;
+ error = 0;
+ nfsm_chain_null(&nmrep);
+ goto nfsmout;
+ }
+ /* match the callback ID to a registered mount */
+ lck_mtx_lock(nfs_global_mutex);
+ TAILQ_FOREACH(nmp, &nfs4_cb_mounts, nm_cblink) {
+ if (nmp->nm_cbid != cbid)
+ continue;
+ /* verify socket's source address matches this mount's server address */
+ if (!nmp->nm_saddr)
+ continue;
+ if (nfs_sockaddr_cmp((struct sockaddr*)&ncbsp->ncbs_saddr, nmp->nm_saddr) == 0)
+ break;
+ }
+ /* mark the NFS mount as busy */
+ if (nmp)
+ nmp->nm_cbrefs++;
+ lck_mtx_unlock(nfs_global_mutex);
+ if (!nmp) {
+ /* if no mount match, just drop socket. */
+ error = EPERM;
+ nfsm_chain_null(&nmrep);
+ goto out;
+ }
+
+ /* process ops, adding results to mrest */
+ while (numops > 0) {
+ numops--;
+ nfsm_chain_get_32(error, &nmreq, op);
+ if (error)
+ break;
+ switch (op) {
+ case NFS_OP_CB_GETATTR:
+ // (FH, BITMAP) -> (STATUS, BITMAP, ATTRS)
+ np = NULL;
+ nfsm_chain_get_fh(error, &nmreq, NFS_VER4, &fh);
+ bmlen = NFS_ATTR_BITMAP_LEN;
+ nfsm_chain_get_bitmap(error, &nmreq, bitmap, bmlen);
+ if (error) {
+ status = error;
+ error = 0;
+ numops = 0; /* don't process any more ops */
+ } else {
+ /* find the node for the file handle */
+ error = nfs_nget(nmp->nm_mountp, NULL, NULL, fh.fh_data, fh.fh_len, NULL, NULL, RPCAUTH_UNKNOWN, NG_NOCREATE, &np);
+ if (error || !np) {
+ status = NFSERR_BADHANDLE;
+ error = 0;
+ np = NULL;
+ numops = 0; /* don't process any more ops */
+ }
+ }
+ nfsm_chain_add_32(error, &nmrep, op);
+ nfsm_chain_add_32(error, &nmrep, status);
+ if (!error && (status == EBADRPC))
+ error = status;
+ if (np) {
+ /* only allow returning size, change, and mtime attrs */
+ NFS_CLEAR_ATTRIBUTES(&rbitmap);
+ attrbytes = 0;
+ if (NFS_BITMAP_ISSET(&bitmap, NFS_FATTR_CHANGE)) {
+ NFS_BITMAP_SET(&rbitmap, NFS_FATTR_CHANGE);
+ attrbytes += 2 * NFSX_UNSIGNED;
+ }
+ if (NFS_BITMAP_ISSET(&bitmap, NFS_FATTR_SIZE)) {
+ NFS_BITMAP_SET(&rbitmap, NFS_FATTR_SIZE);
+ attrbytes += 2 * NFSX_UNSIGNED;
+ }
+ if (NFS_BITMAP_ISSET(&bitmap, NFS_FATTR_TIME_MODIFY)) {
+ NFS_BITMAP_SET(&rbitmap, NFS_FATTR_TIME_MODIFY);
+ attrbytes += 3 * NFSX_UNSIGNED;
+ }
+ nfsm_chain_add_bitmap(error, &nmrep, rbitmap, NFS_ATTR_BITMAP_LEN);
+ nfsm_chain_add_32(error, &nmrep, attrbytes);
+ if (NFS_BITMAP_ISSET(&bitmap, NFS_FATTR_CHANGE))
+ nfsm_chain_add_64(error, &nmrep,
+ np->n_vattr.nva_change + ((np->n_flag & NMODIFIED) ? 1 : 0));
+ if (NFS_BITMAP_ISSET(&bitmap, NFS_FATTR_SIZE))
+ nfsm_chain_add_64(error, &nmrep, np->n_size);
+ if (NFS_BITMAP_ISSET(&bitmap, NFS_FATTR_TIME_MODIFY)) {
+ nfsm_chain_add_64(error, &nmrep, np->n_vattr.nva_timesec[NFSTIME_MODIFY]);
+ nfsm_chain_add_32(error, &nmrep, np->n_vattr.nva_timensec[NFSTIME_MODIFY]);
+ }
+ nfs_node_unlock(np);
+ vnode_put(NFSTOV(np));
+ np = NULL;
+ }
+ /*
+ * If we hit an error building the reply, we can't easily back up.
+ * So we'll just update the status and hope the server ignores the
+ * extra garbage.
+ */
+ break;
+ case NFS_OP_CB_RECALL:
+ // (STATEID, TRUNCATE, FH) -> (STATUS)
+ np = NULL;
+ nfsm_chain_get_stateid(error, &nmreq, &stateid);
+ nfsm_chain_get_32(error, &nmreq, truncate);
+ nfsm_chain_get_fh(error, &nmreq, NFS_VER4, &fh);
+ if (error) {
+ status = error;
+ error = 0;
+ numops = 0; /* don't process any more ops */
+ } else {
+ /* find the node for the file handle */
+ error = nfs_nget(nmp->nm_mountp, NULL, NULL, fh.fh_data, fh.fh_len, NULL, NULL, RPCAUTH_UNKNOWN, NG_NOCREATE, &np);
+ if (error || !np) {
+ status = NFSERR_BADHANDLE;
+ error = 0;
+ np = NULL;
+ numops = 0; /* don't process any more ops */
+ } else if (!(np->n_openflags & N_DELEG_MASK) ||
+ bcmp(&np->n_dstateid, &stateid, sizeof(stateid))) {
+ /* delegation stateid state doesn't match */
+ status = NFSERR_BAD_STATEID;
+ numops = 0; /* don't process any more ops */
+ }
+ if (!status) /* add node to recall queue, and wake socket thread */
+ nfs4_delegation_return_enqueue(np);
+ if (np) {
+ nfs_node_unlock(np);
+ vnode_put(NFSTOV(np));
+ }
+ }
+ nfsm_chain_add_32(error, &nmrep, op);
+ nfsm_chain_add_32(error, &nmrep, status);
+ if (!error && (status == EBADRPC))
+ error = status;
+ break;
+ case NFS_OP_CB_ILLEGAL:
+ default:
+ nfsm_chain_add_32(error, &nmrep, NFS_OP_CB_ILLEGAL);
+ status = NFSERR_OP_ILLEGAL;
+ nfsm_chain_add_32(error, &nmrep, status);
+ numops = 0; /* don't process any more ops */
+ break;
+ }
+ numres++;
+ }
+
+ if (!status && error) {
+ if (error == EBADRPC)
+ status = error;
+ else if ((error == ENOBUFS) || (error == ENOMEM))
+ status = NFSERR_RESOURCE;
+ else
+ status = NFSERR_SERVERFAULT;
+ error = 0;
+ }
+
+ /* Now, set the numres field */
+ *pnumres = txdr_unsigned(numres);
+ nfsm_chain_build_done(error, &nmrep);
+ nfsm_chain_null(&nmrep);
+
+ /* drop the callback reference on the mount */
+ lck_mtx_lock(nfs_global_mutex);
+ nmp->nm_cbrefs--;
+ if (!nmp->nm_cbid)
+ wakeup(&nmp->nm_cbrefs);
+ lck_mtx_unlock(nfs_global_mutex);
+ break;
+ }
+
+nfsmout:
+ if (status == EBADRPC)
+ OSAddAtomic64(1, &nfsstats.rpcinvalid);
+
+ /* build reply header */
+ error = mbuf_gethdr(MBUF_WAITOK, MBUF_TYPE_DATA, &mhead);
+ nfsm_chain_init(&nmrep, mhead);
+ nfsm_chain_add_32(error, &nmrep, 0); /* insert space for an RPC record mark */
+ nfsm_chain_add_32(error, &nmrep, xid);
+ nfsm_chain_add_32(error, &nmrep, RPC_REPLY);
+ if ((status == ERPCMISMATCH) || (status & NFSERR_AUTHERR)) {
+ nfsm_chain_add_32(error, &nmrep, RPC_MSGDENIED);
+ if (status & NFSERR_AUTHERR) {
+ nfsm_chain_add_32(error, &nmrep, RPC_AUTHERR);
+ nfsm_chain_add_32(error, &nmrep, (status & ~NFSERR_AUTHERR));
+ } else {
+ nfsm_chain_add_32(error, &nmrep, RPC_MISMATCH);
+ nfsm_chain_add_32(error, &nmrep, RPC_VER2);
+ nfsm_chain_add_32(error, &nmrep, RPC_VER2);
+ }
+ } else {
+ /* reply status */
+ nfsm_chain_add_32(error, &nmrep, RPC_MSGACCEPTED);
+ /* XXX RPCAUTH_NULL verifier */
+ nfsm_chain_add_32(error, &nmrep, RPCAUTH_NULL);
+ nfsm_chain_add_32(error, &nmrep, 0);
+ /* accepted status */
+ switch (status) {
+ case EPROGUNAVAIL:
+ nfsm_chain_add_32(error, &nmrep, RPC_PROGUNAVAIL);
+ break;
+ case EPROGMISMATCH:
+ nfsm_chain_add_32(error, &nmrep, RPC_PROGMISMATCH);
+ nfsm_chain_add_32(error, &nmrep, NFS4_CALLBACK_PROG_VERSION);
+ nfsm_chain_add_32(error, &nmrep, NFS4_CALLBACK_PROG_VERSION);
+ break;
+ case EPROCUNAVAIL:
+ nfsm_chain_add_32(error, &nmrep, RPC_PROCUNAVAIL);
+ break;
+ case EBADRPC:
+ nfsm_chain_add_32(error, &nmrep, RPC_GARBAGE);
+ break;
+ default:
+ nfsm_chain_add_32(error, &nmrep, RPC_SUCCESS);
+ if (status != NFSERR_RETVOID)
+ nfsm_chain_add_32(error, &nmrep, status);
+ break;
+ }
+ }
+ nfsm_chain_build_done(error, &nmrep);
+ if (error) {
+ nfsm_chain_null(&nmrep);
+ goto out;
+ }
+ error = mbuf_setnext(nmrep.nmc_mcur, mrest);
+ if (error) {
+ printf("nfs cb: mbuf_setnext failed %d\n", error);
+ goto out;
+ }
+ mrest = NULL;
+ /* Calculate the size of the reply */
+ replen = 0;
+ for (m = nmrep.nmc_mhead; m; m = mbuf_next(m))
+ replen += mbuf_len(m);
+ mbuf_pkthdr_setlen(mhead, replen);
+ error = mbuf_pkthdr_setrcvif(mhead, NULL);
+ nfsm_chain_set_recmark(error, &nmrep, (replen - NFSX_UNSIGNED) | 0x80000000);
+ nfsm_chain_null(&nmrep);
+
+ /* send the reply */
+ bzero(&msg, sizeof(msg));
+ error = sock_sendmbuf(so, &msg, mhead, 0, &sentlen);
+ mhead = NULL;
+ if (!error && ((int)sentlen != replen))
+ error = EWOULDBLOCK;
+ if (error == EWOULDBLOCK) /* inability to send response is considered fatal */
+ error = ETIMEDOUT;
+out:
+ if (error)
+ nfsm_chain_cleanup(&nmrep);
+ if (mhead)
+ mbuf_freem(mhead);
+ if (mrest)
+ mbuf_freem(mrest);
+ if (mreq)
+ mbuf_freem(mreq);
+ return (error);
+}
+
+
+/*
+ * Initialize an nfs_rpc_record_state structure.
+ */
+void
+nfs_rpc_record_state_init(struct nfs_rpc_record_state *nrrsp)
+{
+ bzero(nrrsp, sizeof(*nrrsp));
+ nrrsp->nrrs_markerleft = sizeof(nrrsp->nrrs_fragleft);
+}
+
+/*
+ * Clean up an nfs_rpc_record_state structure.
+ */
+void
+nfs_rpc_record_state_cleanup(struct nfs_rpc_record_state *nrrsp)
+{
+ if (nrrsp->nrrs_m) {
+ mbuf_freem(nrrsp->nrrs_m);
+ nrrsp->nrrs_m = nrrsp->nrrs_mlast = NULL;
+ }
+}
+
+/*
+ * Read the next (marked) RPC record from the socket.
+ *
+ * *recvp returns if any data was received.
+ * *mp returns the next complete RPC record
+ */
+int
+nfs_rpc_record_read(socket_t so, struct nfs_rpc_record_state *nrrsp, int flags, int *recvp, mbuf_t *mp)
+{
+ struct iovec aio;
+ struct msghdr msg;
+ size_t rcvlen;
+ int error = 0;
+ mbuf_t m;
+
+ *recvp = 0;
+ *mp = NULL;
+
+ /* read the TCP RPC record marker */
+ while (!error && nrrsp->nrrs_markerleft) {
+ aio.iov_base = ((char*)&nrrsp->nrrs_fragleft +
+ sizeof(nrrsp->nrrs_fragleft) - nrrsp->nrrs_markerleft);
+ aio.iov_len = nrrsp->nrrs_markerleft;
+ bzero(&msg, sizeof(msg));
+ msg.msg_iov = &aio;
+ msg.msg_iovlen = 1;
+ error = sock_receive(so, &msg, flags, &rcvlen);
+ if (error || !rcvlen)
+ break;
+ *recvp = 1;
+ nrrsp->nrrs_markerleft -= rcvlen;
+ if (nrrsp->nrrs_markerleft)
+ continue;
+ /* record marker complete */
+ nrrsp->nrrs_fragleft = ntohl(nrrsp->nrrs_fragleft);
+ if (nrrsp->nrrs_fragleft & 0x80000000) {
+ nrrsp->nrrs_lastfrag = 1;
+ nrrsp->nrrs_fragleft &= ~0x80000000;
+ }
+ nrrsp->nrrs_reclen += nrrsp->nrrs_fragleft;
+ if (nrrsp->nrrs_reclen > NFS_MAXPACKET) {
+ /* This is SERIOUS! We are out of sync with the sender. */
+ log(LOG_ERR, "impossible RPC record length (%d) on callback", nrrsp->nrrs_reclen);
+ error = EFBIG;
+ }
+ }
+
+ /* read the TCP RPC record fragment */
+ while (!error && !nrrsp->nrrs_markerleft && nrrsp->nrrs_fragleft) {
+ m = NULL;
+ rcvlen = nrrsp->nrrs_fragleft;
+ error = sock_receivembuf(so, NULL, &m, flags, &rcvlen);
+ if (error || !rcvlen || !m)
+ break;
+ *recvp = 1;
+ /* append mbufs to list */
+ nrrsp->nrrs_fragleft -= rcvlen;
+ if (!nrrsp->nrrs_m) {
+ nrrsp->nrrs_m = m;
+ } else {
+ error = mbuf_setnext(nrrsp->nrrs_mlast, m);
+ if (error) {
+ printf("nfs tcp rcv: mbuf_setnext failed %d\n", error);
+ mbuf_freem(m);
+ break;
+ }
+ }
+ while (mbuf_next(m))
+ m = mbuf_next(m);
+ nrrsp->nrrs_mlast = m;
+ }
+
+ /* done reading fragment? */
+ if (!error && !nrrsp->nrrs_markerleft && !nrrsp->nrrs_fragleft) {
+ /* reset socket fragment parsing state */
+ nrrsp->nrrs_markerleft = sizeof(nrrsp->nrrs_fragleft);
+ if (nrrsp->nrrs_lastfrag) {
+ /* RPC record complete */
+ *mp = nrrsp->nrrs_m;
+ /* reset socket record parsing state */
+ nrrsp->nrrs_reclen = 0;
+ nrrsp->nrrs_m = nrrsp->nrrs_mlast = NULL;
+ nrrsp->nrrs_lastfrag = 0;
+ }
+ }
+
+ return (error);
+}
+
+
+
+/*
+ * The NFS client send routine.
+ *
+ * Send the given NFS request out the mount's socket.
+ * Holds nfs_sndlock() for the duration of this call.
+ *
+ * - check for request termination (sigintr)
+ * - wait for reconnect, if necessary
+ * - UDP: check the congestion window
+ * - make a copy of the request to send
+ * - UDP: update the congestion window
+ * - send the request
+ *
+ * If sent successfully, R_MUSTRESEND and R_RESENDERR are cleared.
+ * rexmit count is also updated if this isn't the first send.
+ *
+ * If the send is not successful, make sure R_MUSTRESEND is set.
+ * If this wasn't the first transmit, set R_RESENDERR.
+ * Also, undo any UDP congestion window changes made.
+ *
+ * If the error appears to indicate that the socket should
+ * be reconnected, mark the socket for reconnection.
+ *
+ * Only return errors when the request should be aborted.
+ */
+int
+nfs_send(struct nfsreq *req, int wait)
+{
+ struct nfsmount *nmp;
+ struct nfs_socket *nso;
+ int error, error2, sotype, rexmit, slpflag = 0, needrecon;
+ struct msghdr msg;
+ struct sockaddr *sendnam;
+ mbuf_t mreqcopy;
+ size_t sentlen = 0;
+ struct timespec ts = { 2, 0 };
+
+again:
+ error = nfs_sndlock(req);
+ if (error) {
+ lck_mtx_lock(&req->r_mtx);
+ req->r_error = error;
+ req->r_flags &= ~R_SENDING;
+ lck_mtx_unlock(&req->r_mtx);
+ return (error);
+ }
+
+ error = nfs_sigintr(req->r_nmp, req, NULL, 0);
+ if (error) {
+ nfs_sndunlock(req);
+ lck_mtx_lock(&req->r_mtx);
+ req->r_error = error;
+ req->r_flags &= ~R_SENDING;
+ lck_mtx_unlock(&req->r_mtx);
+ return (error);
+ }
+ nmp = req->r_nmp;
+ sotype = nmp->nm_sotype;
+
+ /*
+ * If it's a setup RPC but we're not in SETUP... must need reconnect.
+ * If it's a recovery RPC but the socket's not ready... must need reconnect.
+ */
+ if (((req->r_flags & R_SETUP) && !(nmp->nm_sockflags & NMSOCK_SETUP)) ||
+ ((req->r_flags & R_RECOVER) && !(nmp->nm_sockflags & NMSOCK_READY))) {
+ error = ETIMEDOUT;
+ nfs_sndunlock(req);
+ lck_mtx_lock(&req->r_mtx);
+ req->r_error = error;
+ req->r_flags &= ~R_SENDING;
+ lck_mtx_unlock(&req->r_mtx);
+ return (error);
+ }
+
+ /* If the socket needs reconnection, do that now. */
+ /* wait until socket is ready - unless this request is part of setup */
+ lck_mtx_lock(&nmp->nm_lock);
+ if (!(nmp->nm_sockflags & NMSOCK_READY) &&
+ !((nmp->nm_sockflags & NMSOCK_SETUP) && (req->r_flags & R_SETUP))) {
+ if (NMFLAG(nmp, INTR) && !(req->r_flags & R_NOINTR))
+ slpflag |= PCATCH;
+ lck_mtx_unlock(&nmp->nm_lock);
+ nfs_sndunlock(req);
+ if (!wait) {
+ lck_mtx_lock(&req->r_mtx);
+ req->r_flags &= ~R_SENDING;
+ req->r_flags |= R_MUSTRESEND;
+ req->r_rtt = 0;
+ lck_mtx_unlock(&req->r_mtx);
+ return (0);
+ }
+ NFS_SOCK_DBG("nfs_send: 0x%llx wait reconnect\n", req->r_xid);
+ lck_mtx_lock(&req->r_mtx);
+ req->r_flags &= ~R_MUSTRESEND;
+ req->r_rtt = 0;
+ lck_mtx_unlock(&req->r_mtx);
+ lck_mtx_lock(&nmp->nm_lock);
+ while (!(nmp->nm_sockflags & NMSOCK_READY)) {
+ /* don't bother waiting if the socket thread won't be reconnecting it */
+ if (nmp->nm_state & (NFSSTA_FORCE|NFSSTA_DEAD)) {
+ error = EIO;
+ break;
+ }
+ if ((NMFLAG(nmp, SOFT) || (req->r_flags & R_SOFT)) && (nmp->nm_reconnect_start > 0)) {
+ struct timeval now;
+ microuptime(&now);
+ if ((now.tv_sec - nmp->nm_reconnect_start) >= 8) {
+ /* soft mount in reconnect for a while... terminate ASAP */
+ OSAddAtomic64(1, &nfsstats.rpctimeouts);
+ req->r_flags |= R_SOFTTERM;
+ req->r_error = error = ETIMEDOUT;
+ break;
+ }
+ }
+ /* make sure socket thread is running, then wait */
+ nfs_mount_sock_thread_wake(nmp);
+ if ((error = nfs_sigintr(req->r_nmp, req, req->r_thread, 1)))
+ break;
+ msleep(req, &nmp->nm_lock, slpflag|PSOCK, "nfsconnectwait", &ts);
+ slpflag = 0;
+ }
+ lck_mtx_unlock(&nmp->nm_lock);
+ if (error) {
+ lck_mtx_lock(&req->r_mtx);
+ req->r_error = error;
+ req->r_flags &= ~R_SENDING;
+ lck_mtx_unlock(&req->r_mtx);
+ return (error);
+ }
+ goto again;
+ }
+ nso = nmp->nm_nso;
+ /* note that we're using the mount's socket to do the send */
+ nmp->nm_state |= NFSSTA_SENDING; /* will be cleared by nfs_sndunlock() */
+ lck_mtx_unlock(&nmp->nm_lock);
+ if (!nso) {
+ nfs_sndunlock(req);
+ lck_mtx_lock(&req->r_mtx);
+ req->r_flags &= ~R_SENDING;
+ req->r_flags |= R_MUSTRESEND;
+ req->r_rtt = 0;
+ lck_mtx_unlock(&req->r_mtx);
+ return (0);
+ }
+
+ lck_mtx_lock(&req->r_mtx);
+ rexmit = (req->r_flags & R_SENT);
+
+ if (sotype == SOCK_DGRAM) {
+ lck_mtx_lock(&nmp->nm_lock);
+ if (!(req->r_flags & R_CWND) && (nmp->nm_sent >= nmp->nm_cwnd)) {
+ /* if we can't send this out yet, wait on the cwnd queue */
+ slpflag = (NMFLAG(nmp, INTR) && req->r_thread) ? PCATCH : 0;
+ lck_mtx_unlock(&nmp->nm_lock);
+ nfs_sndunlock(req);
+ req->r_flags &= ~R_SENDING;
+ req->r_flags |= R_MUSTRESEND;
+ lck_mtx_unlock(&req->r_mtx);
+ if (!wait) {
+ req->r_rtt = 0;
+ return (0);
+ }
+ lck_mtx_lock(&nmp->nm_lock);
+ while (nmp->nm_sent >= nmp->nm_cwnd) {
+ if ((error = nfs_sigintr(req->r_nmp, req, req->r_thread, 1)))
+ break;
+ TAILQ_INSERT_TAIL(&nmp->nm_cwndq, req, r_cchain);
+ msleep(req, &nmp->nm_lock, slpflag | (PZERO - 1), "nfswaitcwnd", &ts);
+ slpflag = 0;
+ if ((req->r_cchain.tqe_next != NFSREQNOLIST)) {
+ TAILQ_REMOVE(&nmp->nm_cwndq, req, r_cchain);
+ req->r_cchain.tqe_next = NFSREQNOLIST;
+ }
+ }
+ lck_mtx_unlock(&nmp->nm_lock);
+ goto again;
+ }
+ /*
+ * We update these *before* the send to avoid racing
+ * against others who may be looking to send requests.
+ */
+ if (!rexmit) {
+ /* first transmit */
+ req->r_flags |= R_CWND;
+ nmp->nm_sent += NFS_CWNDSCALE;
+ } else {
+ /*
+ * When retransmitting, turn timing off
+ * and divide congestion window by 2.
+ */
+ req->r_flags &= ~R_TIMING;
+ nmp->nm_cwnd >>= 1;
+ if (nmp->nm_cwnd < NFS_CWNDSCALE)
+ nmp->nm_cwnd = NFS_CWNDSCALE;
+ }
+ lck_mtx_unlock(&nmp->nm_lock);
+ }
+
+ req->r_flags &= ~R_MUSTRESEND;
+ lck_mtx_unlock(&req->r_mtx);
+
+ error = mbuf_copym(req->r_mhead, 0, MBUF_COPYALL,
+ wait ? MBUF_WAITOK : MBUF_DONTWAIT, &mreqcopy);
+ if (error) {
+ if (wait)
+ log(LOG_INFO, "nfs_send: mbuf copy failed %d\n", error);
+ nfs_sndunlock(req);
+ lck_mtx_lock(&req->r_mtx);
+ req->r_flags &= ~R_SENDING;
+ req->r_flags |= R_MUSTRESEND;
+ req->r_rtt = 0;
+ lck_mtx_unlock(&req->r_mtx);
+ return (0);
+ }
+
+ bzero(&msg, sizeof(msg));
+ if ((sotype != SOCK_STREAM) && !sock_isconnected(nso->nso_so) && ((sendnam = nmp->nm_saddr))) {
+ msg.msg_name = (caddr_t)sendnam;
+ msg.msg_namelen = sendnam->sa_len;
+ }
+ error = sock_sendmbuf(nso->nso_so, &msg, mreqcopy, 0, &sentlen);
+ if (error || (sentlen != req->r_mreqlen)) {
+ NFS_SOCK_DBG("nfs_send: 0x%llx sent %d/%d error %d\n",
+ req->r_xid, (int)sentlen, (int)req->r_mreqlen, error);
+ }
+
+ if (!error && (sentlen != req->r_mreqlen))
+ error = EWOULDBLOCK;
+ needrecon = ((sotype == SOCK_STREAM) && sentlen && (sentlen != req->r_mreqlen));
+
+ lck_mtx_lock(&req->r_mtx);
+ req->r_flags &= ~R_SENDING;
+ req->r_rtt = 0;
+ if (rexmit && (++req->r_rexmit > NFS_MAXREXMIT))
+ req->r_rexmit = NFS_MAXREXMIT;
+
+ if (!error) {
+ /* SUCCESS */
+ req->r_flags &= ~R_RESENDERR;
+ if (rexmit)
+ OSAddAtomic64(1, &nfsstats.rpcretries);
+ req->r_flags |= R_SENT;
+ if (req->r_flags & R_WAITSENT) {
+ req->r_flags &= ~R_WAITSENT;
+ wakeup(req);
+ }
+ nfs_sndunlock(req);
+ lck_mtx_unlock(&req->r_mtx);
+ return (0);
+ }
+
+ /* send failed */
+ req->r_flags |= R_MUSTRESEND;
+ if (rexmit)
+ req->r_flags |= R_RESENDERR;
+ if ((error == EINTR) || (error == ERESTART))
+ req->r_error = error;
+ lck_mtx_unlock(&req->r_mtx);
+
+ if (sotype == SOCK_DGRAM) {
+ /*
+ * Note: even though a first send may fail, we consider
+ * the request sent for congestion window purposes.
+ * So we don't need to undo any of the changes made above.
+ */
+ /*
+ * Socket errors ignored for connectionless sockets??
+ * For now, ignore them all
+ */
+ if ((error != EINTR) && (error != ERESTART) &&
+ (error != EWOULDBLOCK) && (error != EIO) && (nso == nmp->nm_nso)) {
+ int clearerror = 0, optlen = sizeof(clearerror);
+ sock_getsockopt(nso->nso_so, SOL_SOCKET, SO_ERROR, &clearerror, &optlen);
+#ifdef NFS_SOCKET_DEBUGGING
+ if (clearerror)
+ NFS_SOCK_DBG("nfs_send: ignoring UDP socket error %d so %d\n",
+ error, clearerror);
+#endif
+ }
+ }
+
+ /* check if it appears we should reconnect the socket */
+ switch (error) {
+ case EWOULDBLOCK:
+ /* if send timed out, reconnect if on TCP */
+ if (sotype != SOCK_STREAM)
+ break;
+ case EPIPE:
+ case EADDRNOTAVAIL:
+ case ENETDOWN:
+ case ENETUNREACH:
+ case ENETRESET:
+ case ECONNABORTED:
+ case ECONNRESET:
+ case ENOTCONN:
+ case ESHUTDOWN:
+ case ECONNREFUSED:
+ case EHOSTDOWN:
+ case EHOSTUNREACH:
+ needrecon = 1;
+ break;
+ }
+ if (needrecon && (nso == nmp->nm_nso)) { /* mark socket as needing reconnect */
+ NFS_SOCK_DBG("nfs_send: 0x%llx need reconnect %d\n", req->r_xid, error);
+ nfs_need_reconnect(nmp);
+ }
+
+ nfs_sndunlock(req);
+
+ if (nfs_is_dead(error, nmp))
+ error = EIO;
+
+ /*
+ * Don't log some errors:
+ * EPIPE errors may be common with servers that drop idle connections.
+ * EADDRNOTAVAIL may occur on network transitions.
+ * ENOTCONN may occur under some network conditions.
+ */
+ if ((error == EPIPE) || (error == EADDRNOTAVAIL) || (error == ENOTCONN))
+ error = 0;
+ if (error && (error != EINTR) && (error != ERESTART))
+ log(LOG_INFO, "nfs send error %d for server %s\n", error,
+ !req->r_nmp ? "<unmounted>" :
+ vfs_statfs(req->r_nmp->nm_mountp)->f_mntfromname);
+
+ /* prefer request termination error over other errors */
+ error2 = nfs_sigintr(req->r_nmp, req, req->r_thread, 0);
+ if (error2)
+ error = error2;
+
+ /* only allow the following errors to be returned */
+ if ((error != EINTR) && (error != ERESTART) && (error != EIO) &&
+ (error != ENXIO) && (error != ETIMEDOUT))
+ error = 0;
+ return (error);
+}
+
+/*
+ * NFS client socket upcalls
+ *
+ * Pull RPC replies out of an NFS mount's socket and match them
+ * up with the pending request.
+ *
+ * The datagram code is simple because we always get whole
+ * messages out of the socket.
+ *
+ * The stream code is more involved because we have to parse
+ * the RPC records out of the stream.
+ */
+
+/* NFS client UDP socket upcall */
+void
+nfs_udp_rcv(socket_t so, void *arg, __unused int waitflag)
+{
+ struct nfsmount *nmp = arg;
+ struct nfs_socket *nso = nmp->nm_nso;
+ size_t rcvlen;
+ mbuf_t m;
+ int error = 0;
+
+ if (nmp->nm_sockflags & NMSOCK_CONNECTING)
+ return;
+
+ do {
+ /* make sure we're on the current socket */
+ if (!nso || (nso->nso_so != so))
+ return;
+
+ m = NULL;
+ rcvlen = 1000000;
+ error = sock_receivembuf(so, NULL, &m, MSG_DONTWAIT, &rcvlen);
+ if (m)
+ nfs_request_match_reply(nmp, m);
+ } while (m && !error);
+
+ if (error && (error != EWOULDBLOCK)) {
+ /* problems with the socket... mark for reconnection */
+ NFS_SOCK_DBG("nfs_udp_rcv: need reconnect %d\n", error);
+ nfs_need_reconnect(nmp);
+ }
+}
+
+/* NFS client TCP socket upcall */
+void
+nfs_tcp_rcv(socket_t so, void *arg, __unused int waitflag)
+{
+ struct nfsmount *nmp = arg;
+ struct nfs_socket *nso = nmp->nm_nso;
+ struct nfs_rpc_record_state nrrs;
+ mbuf_t m;
+ int error = 0;
+ int recv = 1;
+ int wup = 0;
+
+ if (nmp->nm_sockflags & NMSOCK_CONNECTING)
+ return;
+
+ /* make sure we're on the current socket */
+ lck_mtx_lock(&nmp->nm_lock);
+ nso = nmp->nm_nso;
+ if (!nso || (nso->nso_so != so) || (nmp->nm_sockflags & (NMSOCK_DISCONNECTING))) {
+ lck_mtx_unlock(&nmp->nm_lock);
+ return;
+ }
+ lck_mtx_unlock(&nmp->nm_lock);
+
+ /* make sure this upcall should be trying to do work */
+ lck_mtx_lock(&nso->nso_lock);
+ if (nso->nso_flags & (NSO_UPCALL|NSO_DISCONNECTING|NSO_DEAD)) {
+ lck_mtx_unlock(&nso->nso_lock);
+ return;
+ }
+ nso->nso_flags |= NSO_UPCALL;
+ nrrs = nso->nso_rrs;
+ lck_mtx_unlock(&nso->nso_lock);
+
+ /* loop while we make error-free progress */
+ while (!error && recv) {
+ error = nfs_rpc_record_read(so, &nrrs, MSG_DONTWAIT, &recv, &m);
+ if (m) /* match completed response with request */
+ nfs_request_match_reply(nmp, m);
+ }
+
+ /* Update the sockets's rpc parsing state */
+ lck_mtx_lock(&nso->nso_lock);
+ nso->nso_rrs = nrrs;
+ if (nso->nso_flags & NSO_DISCONNECTING)
+ wup = 1;
+ nso->nso_flags &= ~NSO_UPCALL;
+ lck_mtx_unlock(&nso->nso_lock);
+ if (wup)
+ wakeup(&nso->nso_flags);
+
+#ifdef NFS_SOCKET_DEBUGGING
+ if (!recv && (error != EWOULDBLOCK))
+ NFS_SOCK_DBG("nfs_tcp_rcv: got nothing, error %d, got FIN?\n", error);
+#endif
+ /* note: no error and no data indicates server closed its end */
+ if ((error != EWOULDBLOCK) && (error || !recv)) {
+ /* problems with the socket... mark for reconnection */
+ NFS_SOCK_DBG("nfs_tcp_rcv: need reconnect %d\n", error);
+ nfs_need_reconnect(nmp);
+ }
+}
+
+/*
+ * "poke" a socket to try to provoke any pending errors
+ */
+void
+nfs_sock_poke(struct nfsmount *nmp)
+{
+ struct iovec aio;
+ struct msghdr msg;
+ size_t len;
+ int error = 0;
+ int dummy;
+
+ lck_mtx_lock(&nmp->nm_lock);
+ if ((nmp->nm_sockflags & NMSOCK_UNMOUNT) ||
+ !(nmp->nm_sockflags & NMSOCK_READY) || !nmp->nm_nso || !nmp->nm_nso->nso_so) {
+ /* Nothing to poke */
+ nmp->nm_sockflags &= ~NMSOCK_POKE;
+ wakeup(&nmp->nm_sockflags);
+ lck_mtx_unlock(&nmp->nm_lock);
+ return;
+ }
+ lck_mtx_unlock(&nmp->nm_lock);
+ aio.iov_base = &dummy;
+ aio.iov_len = 0;
+ len = 0;
+ bzero(&msg, sizeof(msg));
+ msg.msg_iov = &aio;
+ msg.msg_iovlen = 1;
+ error = sock_send(nmp->nm_nso->nso_so, &msg, MSG_DONTWAIT, &len);
+ NFS_SOCK_DBG("nfs_sock_poke: error %d\n", error);
+ lck_mtx_lock(&nmp->nm_lock);
+ nmp->nm_sockflags &= ~NMSOCK_POKE;
+ wakeup(&nmp->nm_sockflags);
+ lck_mtx_unlock(&nmp->nm_lock);
+ nfs_is_dead(error, nmp);
+}
+
+/*
+ * Match an RPC reply with the corresponding request
+ */
+void
+nfs_request_match_reply(struct nfsmount *nmp, mbuf_t mrep)
+{
+ struct nfsreq *req;
+ struct nfsm_chain nmrep;
+ u_int32_t reply = 0, rxid = 0;
+ int error = 0, asyncioq, t1;
+
+ /* Get the xid and check that it is an rpc reply */
+ nfsm_chain_dissect_init(error, &nmrep, mrep);
+ nfsm_chain_get_32(error, &nmrep, rxid);
+ nfsm_chain_get_32(error, &nmrep, reply);
+ if (error || (reply != RPC_REPLY)) {
+ OSAddAtomic64(1, &nfsstats.rpcinvalid);
+ mbuf_freem(mrep);
+ return;
+ }
+
+ /*
+ * Loop through the request list to match up the reply
+ * Iff no match, just drop it.
+ */
+ lck_mtx_lock(nfs_request_mutex);
+ TAILQ_FOREACH(req, &nfs_reqq, r_chain) {
+ if (req->r_nmrep.nmc_mhead || (rxid != R_XID32(req->r_xid)))
+ continue;
+ /* looks like we have it, grab lock and double check */
+ lck_mtx_lock(&req->r_mtx);
+ if (req->r_nmrep.nmc_mhead || (rxid != R_XID32(req->r_xid))) {
+ lck_mtx_unlock(&req->r_mtx);
+ continue;
+ }
+ /* Found it.. */
+ req->r_nmrep = nmrep;
+ lck_mtx_lock(&nmp->nm_lock);
+ if (nmp->nm_sotype == SOCK_DGRAM) {
+ /*
+ * Update congestion window.
+ * Do the additive increase of one rpc/rtt.
+ */
+ FSDBG(530, R_XID32(req->r_xid), req, nmp->nm_sent, nmp->nm_cwnd);
+ if (nmp->nm_cwnd <= nmp->nm_sent) {
+ nmp->nm_cwnd +=
+ ((NFS_CWNDSCALE * NFS_CWNDSCALE) +
+ (nmp->nm_cwnd >> 1)) / nmp->nm_cwnd;
+ if (nmp->nm_cwnd > NFS_MAXCWND)
+ nmp->nm_cwnd = NFS_MAXCWND;
+ }
+ if (req->r_flags & R_CWND) {
+ nmp->nm_sent -= NFS_CWNDSCALE;
+ req->r_flags &= ~R_CWND;
+ }
+ if ((nmp->nm_sent < nmp->nm_cwnd) && !TAILQ_EMPTY(&nmp->nm_cwndq)) {
+ /* congestion window is open, poke the cwnd queue */
+ struct nfsreq *req2 = TAILQ_FIRST(&nmp->nm_cwndq);
+ TAILQ_REMOVE(&nmp->nm_cwndq, req2, r_cchain);
+ req2->r_cchain.tqe_next = NFSREQNOLIST;
+ wakeup(req2);
+ }
+ }
+ /*
+ * Update rtt using a gain of 0.125 on the mean
+ * and a gain of 0.25 on the deviation.
+ */
+ if (req->r_flags & R_TIMING) {
+ /*
+ * Since the timer resolution of
+ * NFS_HZ is so course, it can often
+ * result in r_rtt == 0. Since
+ * r_rtt == N means that the actual
+ * rtt is between N+dt and N+2-dt ticks,
+ * add 1.
+ */
+ if (proct[req->r_procnum] == 0)
+ panic("nfs_request_match_reply: proct[%d] is zero", req->r_procnum);
+ t1 = req->r_rtt + 1;
+ t1 -= (NFS_SRTT(req) >> 3);
+ NFS_SRTT(req) += t1;
+ if (t1 < 0)
+ t1 = -t1;
+ t1 -= (NFS_SDRTT(req) >> 2);
+ NFS_SDRTT(req) += t1;
+ }
+ nmp->nm_timeouts = 0;
+ lck_mtx_unlock(&nmp->nm_lock);
+ /* signal anyone waiting on this request */
+ wakeup(req);
+ asyncioq = (req->r_callback.rcb_func != NULL);
+ if (nfs_request_using_gss(req))
+ nfs_gss_clnt_rpcdone(req);
+ lck_mtx_unlock(&req->r_mtx);
+ lck_mtx_unlock(nfs_request_mutex);
+ /* if it's an async RPC with a callback, queue it up */
+ if (asyncioq)
+ nfs_asyncio_finish(req);
+ break;
+ }
+
+ if (!req) {
+ /* not matched to a request, so drop it. */
+ lck_mtx_unlock(nfs_request_mutex);
+ OSAddAtomic64(1, &nfsstats.rpcunexpected);
+ mbuf_freem(mrep);
+ }
+}
+
+/*
+ * Wait for the reply for a given request...
+ * ...potentially resending the request if necessary.
+ */
+int
+nfs_wait_reply(struct nfsreq *req)
+{
+ struct timespec ts = { 2, 0 };
+ int error = 0, slpflag, first = 1;
+
+ if (req->r_nmp && NMFLAG(req->r_nmp, INTR) && req->r_thread && !(req->r_flags & R_NOINTR))
+ slpflag = PCATCH;
+ else
+ slpflag = 0;
+
+ lck_mtx_lock(&req->r_mtx);
+ while (!req->r_nmrep.nmc_mhead) {
+ if ((error = nfs_sigintr(req->r_nmp, req, first ? NULL : req->r_thread, 0)))
+ break;
+ if (((error = req->r_error)) || req->r_nmrep.nmc_mhead)
+ break;
+ /* check if we need to resend */
+ if (req->r_flags & R_MUSTRESEND) {
+ NFS_SOCK_DBG("nfs wait resend: p %d x 0x%llx f 0x%x rtt %d\n",
+ req->r_procnum, req->r_xid, req->r_flags, req->r_rtt);
+ req->r_flags |= R_SENDING;
+ lck_mtx_unlock(&req->r_mtx);
+ if (nfs_request_using_gss(req)) {
+ /*
+ * It's an RPCSEC_GSS request.
+ * Can't just resend the original request
+ * without bumping the cred sequence number.
+ * Go back and re-build the request.
+ */
+ lck_mtx_lock(&req->r_mtx);
+ req->r_flags &= ~R_SENDING;
+ lck_mtx_unlock(&req->r_mtx);
+ return (EAGAIN);
+ }
+ error = nfs_send(req, 1);
+ lck_mtx_lock(&req->r_mtx);
+ NFS_SOCK_DBG("nfs wait resend: p %d x 0x%llx f 0x%x rtt %d err %d\n",
+ req->r_procnum, req->r_xid, req->r_flags, req->r_rtt, error);
+ if (error)
+ break;
+ if (((error = req->r_error)) || req->r_nmrep.nmc_mhead)
+ break;
+ }
+ /* need to poll if we're P_NOREMOTEHANG */
+ if (nfs_noremotehang(req->r_thread))
+ ts.tv_sec = 1;
+ msleep(req, &req->r_mtx, slpflag | (PZERO - 1), "nfswaitreply", &ts);
+ first = slpflag = 0;
+ }
+ lck_mtx_unlock(&req->r_mtx);
+
+ return (error);
+}
+
+/*
+ * An NFS request goes something like this:
+ * (nb: always frees up mreq mbuf list)
+ * nfs_request_create()
+ * - allocates a request struct if one is not provided
+ * - initial fill-in of the request struct
+ * nfs_request_add_header()
+ * - add the RPC header
+ * nfs_request_send()
+ * - link it into list
+ * - call nfs_send() for first transmit
+ * nfs_request_wait()
+ * - call nfs_wait_reply() to wait for the reply
+ * nfs_request_finish()
+ * - break down rpc header and return with error or nfs reply
+ * pointed to by nmrep.
+ * nfs_request_rele()
+ * nfs_request_destroy()
+ * - clean up the request struct
+ * - free the request struct if it was allocated by nfs_request_create()
+ */
+
+/*
+ * Set up an NFS request struct (allocating if no request passed in).
+ */
+int
+nfs_request_create(
+ nfsnode_t np,
+ mount_t mp, /* used only if !np */
+ struct nfsm_chain *nmrest,
+ int procnum,
+ thread_t thd,
+ kauth_cred_t cred,
+ struct nfsreq **reqp)
+{
+ struct nfsreq *req, *newreq = NULL;
+ struct nfsmount *nmp;
+
+ req = *reqp;
+ if (!req) {
+ /* allocate a new NFS request structure */
+ MALLOC_ZONE(newreq, struct nfsreq*, sizeof(*newreq), M_NFSREQ, M_WAITOK);
+ if (!newreq) {
+ mbuf_freem(nmrest->nmc_mhead);
+ nmrest->nmc_mhead = NULL;
+ return (ENOMEM);
+ }
+ req = newreq;
+ }
+
+ bzero(req, sizeof(*req));
+ if (req == newreq)
+ req->r_flags = R_ALLOCATED;
+
+ nmp = VFSTONFS(np ? NFSTOMP(np) : mp);
+ if (nfs_mount_gone(nmp)) {
+ if (newreq)
+ FREE_ZONE(newreq, sizeof(*newreq), M_NFSREQ);
+ return (ENXIO);
+ }
+ lck_mtx_lock(&nmp->nm_lock);
+ if ((nmp->nm_state & (NFSSTA_FORCE|NFSSTA_DEAD)) &&
+ (nmp->nm_state & NFSSTA_TIMEO)) {
+ lck_mtx_unlock(&nmp->nm_lock);
+ mbuf_freem(nmrest->nmc_mhead);
+ nmrest->nmc_mhead = NULL;
+ if (newreq)
+ FREE_ZONE(newreq, sizeof(*newreq), M_NFSREQ);
+ return (ENXIO);
+ }
+
+ if ((nmp->nm_vers != NFS_VER4) && (procnum >= 0) && (procnum < NFS_NPROCS))
+ OSAddAtomic64(1, &nfsstats.rpccnt[procnum]);
+ if ((nmp->nm_vers == NFS_VER4) && (procnum != NFSPROC4_COMPOUND) && (procnum != NFSPROC4_NULL))
+ panic("nfs_request: invalid NFSv4 RPC request %d\n", procnum);
+
+ lck_mtx_init(&req->r_mtx, nfs_request_grp, LCK_ATTR_NULL);
+ req->r_nmp = nmp;
+ nmp->nm_ref++;
+ req->r_np = np;
+ req->r_thread = thd;
+ if (!thd)
+ req->r_flags |= R_NOINTR;
+ if (IS_VALID_CRED(cred)) {
+ kauth_cred_ref(cred);
+ req->r_cred = cred;
+ }
+ req->r_procnum = procnum;
+ if (proct[procnum] > 0)
+ req->r_flags |= R_TIMING;
+ req->r_nmrep.nmc_mhead = NULL;
+ SLIST_INIT(&req->r_gss_seqlist);
+ req->r_achain.tqe_next = NFSREQNOLIST;
+ req->r_rchain.tqe_next = NFSREQNOLIST;
+ req->r_cchain.tqe_next = NFSREQNOLIST;
+
+ /* set auth flavor to use for request */
+ if (!req->r_cred)
+ req->r_auth = RPCAUTH_NONE;
+ else if (req->r_np && (req->r_np->n_auth != RPCAUTH_INVALID))
+ req->r_auth = req->r_np->n_auth;
+ else
+ req->r_auth = nmp->nm_auth;
+
+ lck_mtx_unlock(&nmp->nm_lock);
+
+ /* move the request mbuf chain to the nfsreq */
+ req->r_mrest = nmrest->nmc_mhead;
+ nmrest->nmc_mhead = NULL;
+
+ req->r_flags |= R_INITTED;
+ req->r_refs = 1;
+ if (newreq)
+ *reqp = req;
+ return (0);
+}
+
+/*
+ * Clean up and free an NFS request structure.
+ */
+void
+nfs_request_destroy(struct nfsreq *req)
+{
+ struct nfsmount *nmp;
+ struct gss_seq *gsp, *ngsp;
+ int clearjbtimeo = 0;
+
+ if (!req || !(req->r_flags & R_INITTED))
+ return;
+ nmp = req->r_nmp;
+ req->r_flags &= ~R_INITTED;
+ if (req->r_lflags & RL_QUEUED)
+ nfs_reqdequeue(req);
+
+ if (req->r_achain.tqe_next != NFSREQNOLIST) {
+ /*
+ * Still on an async I/O queue?
+ * %%% But which one, we may be on a local iod.
+ */
+ lck_mtx_lock(nfsiod_mutex);
+ if (nmp && req->r_achain.tqe_next != NFSREQNOLIST) {
+ TAILQ_REMOVE(&nmp->nm_iodq, req, r_achain);
+ req->r_achain.tqe_next = NFSREQNOLIST;
+ }
+ lck_mtx_unlock(nfsiod_mutex);
+ }
+
+ lck_mtx_lock(&req->r_mtx);
+ if (nmp) {
+ lck_mtx_lock(&nmp->nm_lock);
+ if (req->r_flags & R_CWND) {
+ /* Decrement the outstanding request count. */
+ req->r_flags &= ~R_CWND;
+ nmp->nm_sent -= NFS_CWNDSCALE;
+ if ((nmp->nm_sent < nmp->nm_cwnd) && !TAILQ_EMPTY(&nmp->nm_cwndq)) {
+ /* congestion window is open, poke the cwnd queue */
+ struct nfsreq *req2 = TAILQ_FIRST(&nmp->nm_cwndq);
+ TAILQ_REMOVE(&nmp->nm_cwndq, req2, r_cchain);
+ req2->r_cchain.tqe_next = NFSREQNOLIST;
+ wakeup(req2);
+ }
+ }
+ assert((req->r_flags & R_RESENDQ) == 0);
+ /* XXX should we just remove this conditional, we should have a reference if we're resending */
+ if (req->r_rchain.tqe_next != NFSREQNOLIST) {
+ TAILQ_REMOVE(&nmp->nm_resendq, req, r_rchain);
+ req->r_rchain.tqe_next = NFSREQNOLIST;
+ if (req->r_flags & R_RESENDQ)
+ req->r_flags &= ~R_RESENDQ;
+ }
+ if (req->r_cchain.tqe_next != NFSREQNOLIST) {
+ TAILQ_REMOVE(&nmp->nm_cwndq, req, r_cchain);
+ req->r_cchain.tqe_next = NFSREQNOLIST;
+ }
+ if (req->r_flags & R_JBTPRINTFMSG) {
+ req->r_flags &= ~R_JBTPRINTFMSG;
+ nmp->nm_jbreqs--;
+ clearjbtimeo = (nmp->nm_jbreqs == 0) ? NFSSTA_JUKEBOXTIMEO : 0;
+ }
+ lck_mtx_unlock(&nmp->nm_lock);
+ }
+ lck_mtx_unlock(&req->r_mtx);
+
+ if (clearjbtimeo)
+ nfs_up(nmp, req->r_thread, clearjbtimeo, NULL);
+ if (req->r_mhead)
+ mbuf_freem(req->r_mhead);
+ else if (req->r_mrest)
+ mbuf_freem(req->r_mrest);
+ if (req->r_nmrep.nmc_mhead)
+ mbuf_freem(req->r_nmrep.nmc_mhead);
+ if (IS_VALID_CRED(req->r_cred))
+ kauth_cred_unref(&req->r_cred);
+ if (nfs_request_using_gss(req))
+ nfs_gss_clnt_rpcdone(req);
+ SLIST_FOREACH_SAFE(gsp, &req->r_gss_seqlist, gss_seqnext, ngsp)
+ FREE(gsp, M_TEMP);
+ if (req->r_gss_ctx)
+ nfs_gss_clnt_ctx_unref(req);
+ if (req->r_wrongsec)
+ FREE(req->r_wrongsec, M_TEMP);
+ if (nmp)
+ nfs_mount_rele(nmp);
+ lck_mtx_destroy(&req->r_mtx, nfs_request_grp);
+ if (req->r_flags & R_ALLOCATED)
+ FREE_ZONE(req, sizeof(*req), M_NFSREQ);
+}
+
+void
+nfs_request_ref(struct nfsreq *req, int locked)
+{
+ if (!locked)
+ lck_mtx_lock(&req->r_mtx);
+ if (req->r_refs <= 0)
+ panic("nfsreq reference error");
+ req->r_refs++;
+ if (!locked)
+ lck_mtx_unlock(&req->r_mtx);
+}
+
+void
+nfs_request_rele(struct nfsreq *req)
+{
+ int destroy;
+
+ lck_mtx_lock(&req->r_mtx);
+ if (req->r_refs <= 0)
+ panic("nfsreq reference underflow");
+ req->r_refs--;
+ destroy = (req->r_refs == 0);
+ lck_mtx_unlock(&req->r_mtx);
+ if (destroy)
+ nfs_request_destroy(req);
+}
+
+
+/*
+ * Add an (updated) RPC header with authorization to an NFS request.
+ */
+int
+nfs_request_add_header(struct nfsreq *req)
+{
+ struct nfsmount *nmp;
+ int error = 0;
+ mbuf_t m;
+
+ /* free up any previous header */
+ if ((m = req->r_mhead)) {
+ while (m && (m != req->r_mrest))
+ m = mbuf_free(m);
+ req->r_mhead = NULL;
+ }
+
+ nmp = req->r_nmp;
+ if (nfs_mount_gone(nmp))
+ return (ENXIO);
+
+ error = nfsm_rpchead(req, req->r_mrest, &req->r_xid, &req->r_mhead);
+ if (error)
+ return (error);
+
+ req->r_mreqlen = mbuf_pkthdr_len(req->r_mhead);
+ nmp = req->r_nmp;
+ if (nfs_mount_gone(nmp))
+ return (ENXIO);
+ lck_mtx_lock(&nmp->nm_lock);
+ if (NMFLAG(nmp, SOFT) || (req->r_flags & R_SOFT))
+ req->r_retry = nmp->nm_retry;
+ else
+ req->r_retry = NFS_MAXREXMIT + 1; /* past clip limit */
+ lck_mtx_unlock(&nmp->nm_lock);
+
+ return (error);
+}
+
+
+/*
+ * Queue an NFS request up and send it out.
+ */
+int
+nfs_request_send(struct nfsreq *req, int wait)
+{
+ struct nfsmount *nmp;
+ struct timeval now;
+
+ lck_mtx_lock(&req->r_mtx);
+ req->r_flags |= R_SENDING;
+ lck_mtx_unlock(&req->r_mtx);
+
+ lck_mtx_lock(nfs_request_mutex);
+
+ nmp = req->r_nmp;
+ if (nfs_mount_gone(nmp)) {
+ lck_mtx_unlock(nfs_request_mutex);
+ return (ENXIO);
+ }
+
+ microuptime(&now);
+ if (!req->r_start) {
+ req->r_start = now.tv_sec;
+ req->r_lastmsg = now.tv_sec -
+ ((nmp->nm_tprintf_delay) - (nmp->nm_tprintf_initial_delay));
+ }
+
+ OSAddAtomic64(1, &nfsstats.rpcrequests);
+
+ /*
+ * Chain request into list of outstanding requests. Be sure
+ * to put it LAST so timer finds oldest requests first.
+ * Make sure that the request queue timer is running
+ * to check for possible request timeout.
+ */
+ TAILQ_INSERT_TAIL(&nfs_reqq, req, r_chain);
+ req->r_lflags |= RL_QUEUED;
+ if (!nfs_request_timer_on) {
+ nfs_request_timer_on = 1;
+ nfs_interval_timer_start(nfs_request_timer_call,
+ NFS_REQUESTDELAY);
+ }
+ lck_mtx_unlock(nfs_request_mutex);
+
+ /* Send the request... */
+ return (nfs_send(req, wait));
+}
- /*
- * For reliable protocols, lock against other senders/receivers
- * in case a reconnect is necessary.
- * For SOCK_STREAM, first get the Record Mark to find out how much
- * more there is to get.
- * We must lock the socket against other receivers
- * until we have an entire rpc request/reply.
- */
- if (sotype != SOCK_DGRAM) {
- error = nfs_sndlock(rep);
- if (error)
- return (error);
-tryagain:
+/*
+ * Call nfs_wait_reply() to wait for the reply.
+ */
+void
+nfs_request_wait(struct nfsreq *req)
+{
+ req->r_error = nfs_wait_reply(req);
+}
+
+/*
+ * Finish up an NFS request by dequeueing it and
+ * doing the initial NFS request reply processing.
+ */
+int
+nfs_request_finish(
+ struct nfsreq *req,
+ struct nfsm_chain *nmrepp,
+ int *status)
+{
+ struct nfsmount *nmp;
+ mbuf_t mrep;
+ int verf_type = 0;
+ uint32_t verf_len = 0;
+ uint32_t reply_status = 0;
+ uint32_t rejected_status = 0;
+ uint32_t auth_status = 0;
+ uint32_t accepted_status = 0;
+ struct nfsm_chain nmrep;
+ int error, clearjbtimeo;
+
+ error = req->r_error;
+
+ if (nmrepp)
+ nmrepp->nmc_mhead = NULL;
+
+ /* RPC done, unlink the request. */
+ nfs_reqdequeue(req);
+
+ mrep = req->r_nmrep.nmc_mhead;
+
+ nmp = req->r_nmp;
+
+ if ((req->r_flags & R_CWND) && nmp) {
/*
- * Check for fatal errors and resending request.
+ * Decrement the outstanding request count.
*/
+ req->r_flags &= ~R_CWND;
+ lck_mtx_lock(&nmp->nm_lock);
+ FSDBG(273, R_XID32(req->r_xid), req, nmp->nm_sent, nmp->nm_cwnd);
+ nmp->nm_sent -= NFS_CWNDSCALE;
+ if ((nmp->nm_sent < nmp->nm_cwnd) && !TAILQ_EMPTY(&nmp->nm_cwndq)) {
+ /* congestion window is open, poke the cwnd queue */
+ struct nfsreq *req2 = TAILQ_FIRST(&nmp->nm_cwndq);
+ TAILQ_REMOVE(&nmp->nm_cwndq, req2, r_cchain);
+ req2->r_cchain.tqe_next = NFSREQNOLIST;
+ wakeup(req2);
+ }
+ lck_mtx_unlock(&nmp->nm_lock);
+ }
+
+ if (nfs_request_using_gss(req)) {
/*
- * Ugh: If a reconnect attempt just happened, nm_so
- * would have changed. NULL indicates a failed
- * attempt that has essentially shut down this
- * mount point.
+ * If the request used an RPCSEC_GSS credential
+ * then reset its sequence number bit in the
+ * request window.
*/
- if ((error = nfs_sigintr(rep->r_nmp, rep, p)) || rep->r_mrep) {
- nfs_sndunlock(rep);
- if (error)
- return (error);
- return (EINTR);
- }
- so = rep->r_nmp->nm_so;
- if (!so) {
- error = nfs_reconnect(rep);
- if (error) {
- nfs_sndunlock(rep);
- return (error);
+ nfs_gss_clnt_rpcdone(req);
+
+ /*
+ * If we need to re-send, go back and re-build the
+ * request based on a new sequence number.
+ * Note that we're using the original XID.
+ */
+ if (error == EAGAIN) {
+ req->r_error = 0;
+ if (mrep)
+ mbuf_freem(mrep);
+ error = nfs_gss_clnt_args_restore(req); // remove any trailer mbufs
+ req->r_nmrep.nmc_mhead = NULL;
+ req->r_flags |= R_RESTART;
+ if (error == ENEEDAUTH) {
+ req->r_xid = 0; // get a new XID
+ error = 0;
}
- goto tryagain;
+ goto nfsmout;
+ }
+ }
+
+ /*
+ * If there was a successful reply, make sure to mark the mount as up.
+ * If a tprintf message was given (or if this is a timed-out soft mount)
+ * then post a tprintf message indicating the server is alive again.
+ */
+ if (!error) {
+ if ((req->r_flags & R_TPRINTFMSG) ||
+ (nmp && (NMFLAG(nmp, SOFT) || (req->r_flags & R_SOFT)) &&
+ ((nmp->nm_state & (NFSSTA_TIMEO|NFSSTA_FORCE|NFSSTA_DEAD)) == NFSSTA_TIMEO)))
+ nfs_up(nmp, req->r_thread, NFSSTA_TIMEO, "is alive again");
+ else
+ nfs_up(nmp, req->r_thread, NFSSTA_TIMEO, NULL);
+ }
+ if (!error && !nmp)
+ error = ENXIO;
+ nfsmout_if(error);
+
+ /*
+ * break down the RPC header and check if ok
+ */
+ nmrep = req->r_nmrep;
+ nfsm_chain_get_32(error, &nmrep, reply_status);
+ nfsmout_if(error);
+ if (reply_status == RPC_MSGDENIED) {
+ nfsm_chain_get_32(error, &nmrep, rejected_status);
+ nfsmout_if(error);
+ if (rejected_status == RPC_MISMATCH) {
+ error = ENOTSUP;
+ goto nfsmout;
}
- while (rep->r_flags & R_MUSTRESEND) {
- error = mbuf_copym(rep->r_mreq, 0, MBUF_COPYALL, MBUF_WAITOK, &m);
+ nfsm_chain_get_32(error, &nmrep, auth_status);
+ nfsmout_if(error);
+ switch (auth_status) {
+ case RPCSEC_GSS_CREDPROBLEM:
+ case RPCSEC_GSS_CTXPROBLEM:
+ /*
+ * An RPCSEC_GSS cred or context problem.
+ * We can't use it anymore.
+ * Restore the args, renew the context
+ * and set up for a resend.
+ */
+ error = nfs_gss_clnt_args_restore(req);
+ if (error && error != ENEEDAUTH)
+ break;
+
if (!error) {
- OSAddAtomic(1, (SInt32*)&nfsstats.rpcretries);
- error = nfs_send(so, rep->r_nmp->nm_nam, m, rep);
+ error = nfs_gss_clnt_ctx_renew(req);
+ if (error)
+ break;
}
+ mbuf_freem(mrep);
+ req->r_nmrep.nmc_mhead = NULL;
+ req->r_xid = 0; // get a new XID
+ req->r_flags |= R_RESTART;
+ goto nfsmout;
+ default:
+ error = EACCES;
+ break;
+ }
+ goto nfsmout;
+ }
+
+ /* Now check the verifier */
+ nfsm_chain_get_32(error, &nmrep, verf_type); // verifier flavor
+ nfsm_chain_get_32(error, &nmrep, verf_len); // verifier length
+ nfsmout_if(error);
+
+ switch (req->r_auth) {
+ case RPCAUTH_NONE:
+ case RPCAUTH_SYS:
+ /* Any AUTH_SYS verifier is ignored */
+ if (verf_len > 0)
+ nfsm_chain_adv(error, &nmrep, nfsm_rndup(verf_len));
+ nfsm_chain_get_32(error, &nmrep, accepted_status);
+ break;
+ case RPCAUTH_KRB5:
+ case RPCAUTH_KRB5I:
+ case RPCAUTH_KRB5P:
+ error = nfs_gss_clnt_verf_get(req, &nmrep,
+ verf_type, verf_len, &accepted_status);
+ break;
+ }
+ nfsmout_if(error);
+
+ switch (accepted_status) {
+ case RPC_SUCCESS:
+ if (req->r_procnum == NFSPROC_NULL) {
/*
- * we also hold rcv lock so rep is still
- * legit this point
+ * The NFS null procedure is unique,
+ * in not returning an NFS status.
*/
- if (error) {
- if (error == EINTR || error == ERESTART ||
- (error = nfs_reconnect(rep))) {
- nfs_sndunlock(rep);
- return (error);
+ *status = NFS_OK;
+ } else {
+ nfsm_chain_get_32(error, &nmrep, *status);
+ nfsmout_if(error);
+ }
+
+ if ((nmp->nm_vers != NFS_VER2) && (*status == NFSERR_TRYLATER)) {
+ /*
+ * It's a JUKEBOX error - delay and try again
+ */
+ int delay, slpflag = (NMFLAG(nmp, INTR) && !(req->r_flags & R_NOINTR)) ? PCATCH : 0;
+
+ mbuf_freem(mrep);
+ req->r_nmrep.nmc_mhead = NULL;
+ if ((req->r_delay >= 30) && !(nmp->nm_state & NFSSTA_MOUNTED)) {
+ /* we're not yet completely mounted and */
+ /* we can't complete an RPC, so we fail */
+ OSAddAtomic64(1, &nfsstats.rpctimeouts);
+ nfs_softterm(req);
+ error = req->r_error;
+ goto nfsmout;
+ }
+ req->r_delay = !req->r_delay ? NFS_TRYLATERDEL : (req->r_delay * 2);
+ if (req->r_delay > 30)
+ req->r_delay = 30;
+ if (nmp->nm_tprintf_initial_delay && (req->r_delay >= nmp->nm_tprintf_initial_delay)) {
+ if (!(req->r_flags & R_JBTPRINTFMSG)) {
+ req->r_flags |= R_JBTPRINTFMSG;
+ lck_mtx_lock(&nmp->nm_lock);
+ nmp->nm_jbreqs++;
+ lck_mtx_unlock(&nmp->nm_lock);
}
- goto tryagain;
+ nfs_down(req->r_nmp, req->r_thread, 0, NFSSTA_JUKEBOXTIMEO,
+ "resource temporarily unavailable (jukebox)", 0);
}
- }
- nfs_sndunlock(rep);
- if (sotype == SOCK_STREAM) {
- error = 0;
- len = 0;
- lastfragment = 0;
- mlast = NULL;
- while (!error && !lastfragment) {
- aio.iov_base = (uintptr_t) &fraglen;
- aio.iov_len = sizeof(u_long);
- bzero(&msg, sizeof(msg));
- msg.msg_iov = (struct iovec *) &aio;
- msg.msg_iovlen = 1;
+ if ((NMFLAG(nmp, SOFT) || (req->r_flags & R_SOFT)) && (req->r_delay == 30) &&
+ !(req->r_flags & R_NOINTR)) {
+ /* for soft mounts, just give up after a short while */
+ OSAddAtomic64(1, &nfsstats.rpctimeouts);
+ nfs_softterm(req);
+ error = req->r_error;
+ goto nfsmout;
+ }
+ delay = req->r_delay;
+ if (req->r_callback.rcb_func) {
+ struct timeval now;
+ microuptime(&now);
+ req->r_resendtime = now.tv_sec + delay;
+ } else {
do {
- error = sock_receive(so, &msg, MSG_WAITALL, &rcvlen);
- if (!rep->r_nmp) /* if unmounted then bailout */
- goto shutout;
- if (error == EWOULDBLOCK && rep) {
- error2 = nfs_sigintr(rep->r_nmp, rep, p);
- if (error2)
- error = error2;
- }
- } while (error == EWOULDBLOCK);
- if (!error && rcvlen < aio.iov_len) {
- /* only log a message if we got a partial word */
- if (rcvlen != 0)
- log(LOG_INFO,
- "short receive (%d/%d) from nfs server %s\n",
- rcvlen, sizeof(u_long),
- vfs_statfs(rep->r_nmp->nm_mountp)->f_mntfromname);
- error = EPIPE;
- }
- if (error)
- goto errout;
- lastfragment = ntohl(fraglen) & 0x80000000;
- fraglen = ntohl(fraglen) & ~0x80000000;
- len += fraglen;
- /*
- * This is SERIOUS! We are out of sync with the sender
- * and forcing a disconnect/reconnect is all I can do.
- */
- if (len > NFS_MAXPACKET) {
- log(LOG_ERR, "%s (%d) from nfs server %s\n",
- "impossible RPC record length", len,
- vfs_statfs(rep->r_nmp->nm_mountp)->f_mntfromname);
- error = EFBIG;
- goto errout;
- }
+ if ((error = nfs_sigintr(req->r_nmp, req, req->r_thread, 0)))
+ goto nfsmout;
+ tsleep(nfs_request_finish, PSOCK|slpflag, "nfs_jukebox_trylater", hz);
+ slpflag = 0;
+ } while (--delay > 0);
+ }
+ req->r_xid = 0; // get a new XID
+ req->r_flags |= R_RESTART;
+ req->r_start = 0;
+ FSDBG(273, R_XID32(req->r_xid), nmp, req, NFSERR_TRYLATER);
+ return (0);
+ }
- m = NULL;
- do {
- rcvlen = fraglen;
- error = sock_receivembuf(so, NULL, &m, MSG_WAITALL, &rcvlen);
- if (!rep->r_nmp) /* if unmounted then bailout */ {
- goto shutout;
- }
- } while (error == EWOULDBLOCK || error == EINTR ||
- error == ERESTART);
-
- if (!error && fraglen > rcvlen) {
- log(LOG_INFO,
- "short receive (%d/%d) from nfs server %s\n",
- rcvlen, fraglen,
- vfs_statfs(rep->r_nmp->nm_mountp)->f_mntfromname);
- error = EPIPE;
- mbuf_freem(m);
+ if (req->r_flags & R_JBTPRINTFMSG) {
+ req->r_flags &= ~R_JBTPRINTFMSG;
+ lck_mtx_lock(&nmp->nm_lock);
+ nmp->nm_jbreqs--;
+ clearjbtimeo = (nmp->nm_jbreqs == 0) ? NFSSTA_JUKEBOXTIMEO : 0;
+ lck_mtx_unlock(&nmp->nm_lock);
+ nfs_up(nmp, req->r_thread, clearjbtimeo, "resource available again");
+ }
+
+ if ((nmp->nm_vers >= NFS_VER4) && (*status == NFSERR_WRONGSEC)) {
+ /*
+ * Hmmm... we need to try a different security flavor.
+ * The first time a request hits this, we will allocate an array
+ * to track flavors to try. We fill the array with the mount's
+ * preferred flavors or the server's preferred flavors or just the
+ * flavors we support.
+ */
+ uint32_t srvflavors[NX_MAX_SEC_FLAVORS];
+ int srvcount, i, j;
+
+ /* Call SECINFO to try to get list of flavors from server. */
+ srvcount = NX_MAX_SEC_FLAVORS;
+ nfs4_secinfo_rpc(nmp, &req->r_secinfo, req->r_cred, srvflavors, &srvcount);
+
+ if (!req->r_wrongsec) {
+ /* first time... set up flavor array */
+ MALLOC(req->r_wrongsec, uint32_t*, NX_MAX_SEC_FLAVORS*sizeof(uint32_t), M_TEMP, M_WAITOK);
+ if (!req->r_wrongsec) {
+ error = EACCES;
+ goto nfsmout;
}
- if (!error) {
- if (!*mp) {
- *mp = m;
- mlast = m;
- } else {
- error = mbuf_setnext(mlast, m);
- if (error) {
- printf("nfs_receive: mbuf_setnext failed %d\n", error);
- mbuf_freem(m);
- }
- }
- while (mbuf_next(mlast))
- mlast = mbuf_next(mlast);
+ i=0;
+ if (nmp->nm_sec.count) { /* use the mount's preferred list of flavors */
+ for(; i < nmp->nm_sec.count; i++)
+ req->r_wrongsec[i] = nmp->nm_sec.flavors[i];
+ } else if (srvcount) { /* otherwise use the server's list of flavors */
+ for(; i < srvcount; i++)
+ req->r_wrongsec[i] = srvflavors[i];
+ } else { /* otherwise, just try the flavors we support. */
+ req->r_wrongsec[i++] = RPCAUTH_KRB5P;
+ req->r_wrongsec[i++] = RPCAUTH_KRB5I;
+ req->r_wrongsec[i++] = RPCAUTH_KRB5;
+ req->r_wrongsec[i++] = RPCAUTH_SYS;
+ req->r_wrongsec[i++] = RPCAUTH_NONE;
}
+ for(; i < NX_MAX_SEC_FLAVORS; i++) /* invalidate any remaining slots */
+ req->r_wrongsec[i] = RPCAUTH_INVALID;
}
- } else {
- bzero(&msg, sizeof(msg));
- do {
- rcvlen = 100000000;
- error = sock_receivembuf(so, &msg, mp, 0, &rcvlen);
- if (!rep->r_nmp) /* if unmounted then bailout */ {
- goto shutout;
- }
- if (error == EWOULDBLOCK && rep) {
- error2 = nfs_sigintr(rep->r_nmp, rep, p);
- if (error2) {
- return (error2);
+
+ /* clear the current flavor from the list */
+ for(i=0; i < NX_MAX_SEC_FLAVORS; i++)
+ if (req->r_wrongsec[i] == req->r_auth)
+ req->r_wrongsec[i] = RPCAUTH_INVALID;
+
+ /* find the next flavor to try */
+ for(i=0; i < NX_MAX_SEC_FLAVORS; i++)
+ if (req->r_wrongsec[i] != RPCAUTH_INVALID) {
+ if (!srvcount) /* no server list, just try it */
+ break;
+ /* check that it's in the server's list */
+ for(j=0; j < srvcount; j++)
+ if (req->r_wrongsec[i] == srvflavors[j])
+ break;
+ if (j < srvcount) /* found */
+ break;
+ /* not found in server list */
+ req->r_wrongsec[i] = RPCAUTH_INVALID;
}
- }
- } while (error == EWOULDBLOCK);
-
- if ((msg.msg_flags & MSG_EOR) == 0)
- printf("Egad!!\n");
- if (!error && *mp == NULL)
- error = EPIPE;
- len = rcvlen;
- }
-errout:
- if (error && error != EINTR && error != ERESTART) {
- mbuf_freem(*mp);
- *mp = NULL;
- if (error != EPIPE)
- log(LOG_INFO,
- "receive error %d from nfs server %s\n", error,
- vfs_statfs(rep->r_nmp->nm_mountp)->f_mntfromname);
- error = nfs_sndlock(rep);
- if (!error) {
- error = nfs_reconnect(rep);
- if (!error)
- goto tryagain;
- nfs_sndunlock(rep);
+ if (i == NX_MAX_SEC_FLAVORS) {
+ /* nothing left to try! */
+ error = EACCES;
+ goto nfsmout;
}
+
+ /* retry with the next auth flavor */
+ req->r_auth = req->r_wrongsec[i];
+ req->r_xid = 0; // get a new XID
+ req->r_flags |= R_RESTART;
+ req->r_start = 0;
+ FSDBG(273, R_XID32(req->r_xid), nmp, req, NFSERR_WRONGSEC);
+ return (0);
}
- } else {
+ if ((nmp->nm_vers >= NFS_VER4) && req->r_wrongsec) {
+ /*
+ * We renegotiated security for this request; so update the
+ * default security flavor for the associated node.
+ */
+ if (req->r_np)
+ req->r_np->n_auth = req->r_auth;
+ }
+
+ if (*status == NFS_OK) {
+ /*
+ * Successful NFS request
+ */
+ *nmrepp = nmrep;
+ req->r_nmrep.nmc_mhead = NULL;
+ break;
+ }
+ /* Got an NFS error of some kind */
+
/*
- * We could have failed while rebinding the datagram socket
- * so we need to attempt to rebind here.
+ * If the File Handle was stale, invalidate the
+ * lookup cache, just in case.
*/
- if ((so = rep->r_nmp->nm_so) == NULL) {
- error = nfs_sndlock(rep);
- if (!error) {
- error = nfs_reconnect(rep);
- nfs_sndunlock(rep);
- }
- if (error)
- return (error);
- if (!rep->r_nmp) /* if unmounted then bailout */
- return (ENXIO);
- so = rep->r_nmp->nm_so;
+ if ((*status == ESTALE) && req->r_np) {
+ cache_purge(NFSTOV(req->r_np));
+ /* if monitored, also send delete event */
+ if (vnode_ismonitored(NFSTOV(req->r_np)))
+ nfs_vnode_notify(req->r_np, (VNODE_EVENT_ATTRIB|VNODE_EVENT_DELETE));
}
- bzero(&msg, sizeof(msg));
- len = 0;
- do {
- rcvlen = 1000000;
- error = sock_receivembuf(so, &msg, mp, 0, &rcvlen);
- if (!rep->r_nmp) /* if unmounted then bailout */
- goto shutout;
- if (error) {
- error2 = nfs_sigintr(rep->r_nmp, rep, p);
- if (error2) {
- error = error2;
- goto shutout;
+ if (nmp->nm_vers == NFS_VER2)
+ mbuf_freem(mrep);
+ else
+ *nmrepp = nmrep;
+ req->r_nmrep.nmc_mhead = NULL;
+ error = 0;
+ break;
+ case RPC_PROGUNAVAIL:
+ error = EPROGUNAVAIL;
+ break;
+ case RPC_PROGMISMATCH:
+ error = ERPCMISMATCH;
+ break;
+ case RPC_PROCUNAVAIL:
+ error = EPROCUNAVAIL;
+ break;
+ case RPC_GARBAGE:
+ error = EBADRPC;
+ break;
+ case RPC_SYSTEM_ERR:
+ default:
+ error = EIO;
+ break;
+ }
+nfsmout:
+ if (req->r_flags & R_JBTPRINTFMSG) {
+ req->r_flags &= ~R_JBTPRINTFMSG;
+ lck_mtx_lock(&nmp->nm_lock);
+ nmp->nm_jbreqs--;
+ clearjbtimeo = (nmp->nm_jbreqs == 0) ? NFSSTA_JUKEBOXTIMEO : 0;
+ lck_mtx_unlock(&nmp->nm_lock);
+ if (clearjbtimeo)
+ nfs_up(nmp, req->r_thread, clearjbtimeo, NULL);
+ }
+ FSDBG(273, R_XID32(req->r_xid), nmp, req,
+ (!error && (*status == NFS_OK)) ? 0xf0f0f0f0 : error);
+ return (error);
+}
+
+/*
+ * NFS request using a GSS/Kerberos security flavor?
+ */
+int
+nfs_request_using_gss(struct nfsreq *req)
+{
+ if (!req->r_gss_ctx)
+ return (0);
+ switch (req->r_auth) {
+ case RPCAUTH_KRB5:
+ case RPCAUTH_KRB5I:
+ case RPCAUTH_KRB5P:
+ return (1);
+ }
+ return (0);
+}
+
+/*
+ * Perform an NFS request synchronously.
+ */
+
+int
+nfs_request(
+ nfsnode_t np,
+ mount_t mp, /* used only if !np */
+ struct nfsm_chain *nmrest,
+ int procnum,
+ vfs_context_t ctx,
+ struct nfsreq_secinfo_args *si,
+ struct nfsm_chain *nmrepp,
+ u_int64_t *xidp,
+ int *status)
+{
+ return nfs_request2(np, mp, nmrest, procnum,
+ vfs_context_thread(ctx), vfs_context_ucred(ctx),
+ si, 0, nmrepp, xidp, status);
+}
+
+int
+nfs_request2(
+ nfsnode_t np,
+ mount_t mp, /* used only if !np */
+ struct nfsm_chain *nmrest,
+ int procnum,
+ thread_t thd,
+ kauth_cred_t cred,
+ struct nfsreq_secinfo_args *si,
+ int flags,
+ struct nfsm_chain *nmrepp,
+ u_int64_t *xidp,
+ int *status)
+{
+ struct nfsreq rq, *req = &rq;
+ int error;
+
+ if ((error = nfs_request_create(np, mp, nmrest, procnum, thd, cred, &req)))
+ return (error);
+ req->r_flags |= (flags & (R_OPTMASK | R_SOFT));
+ if (si)
+ req->r_secinfo = *si;
+
+ FSDBG_TOP(273, R_XID32(req->r_xid), np, procnum, 0);
+ do {
+ req->r_error = 0;
+ req->r_flags &= ~R_RESTART;
+ if ((error = nfs_request_add_header(req)))
+ break;
+ if (xidp)
+ *xidp = req->r_xid;
+ if ((error = nfs_request_send(req, 1)))
+ break;
+ nfs_request_wait(req);
+ if ((error = nfs_request_finish(req, nmrepp, status)))
+ break;
+ } while (req->r_flags & R_RESTART);
+
+ FSDBG_BOT(273, R_XID32(req->r_xid), np, procnum, error);
+ nfs_request_rele(req);
+ return (error);
+}
+
+
+/*
+ * Set up a new null proc request to exchange GSS context tokens with the
+ * server. Associate the context that we are setting up with the request that we
+ * are sending.
+ */
+
+int
+nfs_request_gss(
+ mount_t mp,
+ struct nfsm_chain *nmrest,
+ thread_t thd,
+ kauth_cred_t cred,
+ int flags,
+ struct nfs_gss_clnt_ctx *cp, /* Set to gss context to renew or setup */
+ struct nfsm_chain *nmrepp,
+ int *status)
+{
+ struct nfsreq rq, *req = &rq;
+ int error, wait = 1;
+
+ if ((error = nfs_request_create(NULL, mp, nmrest, NFSPROC_NULL, thd, cred, &req)))
+ return (error);
+ req->r_flags |= (flags & R_OPTMASK);
+
+ if (cp == NULL) {
+ printf("nfs_request_gss request has no context\n");
+ nfs_request_rele(req);
+ return (NFSERR_EAUTH);
+ }
+ nfs_gss_clnt_ctx_ref(req, cp);
+
+ /*
+ * Don't wait for a reply to a context destroy advisory
+ * to avoid hanging on a dead server.
+ */
+ if (cp->gss_clnt_proc == RPCSEC_GSS_DESTROY)
+ wait = 0;
+
+ FSDBG_TOP(273, R_XID32(req->r_xid), NULL, NFSPROC_NULL, 0);
+ do {
+ req->r_error = 0;
+ req->r_flags &= ~R_RESTART;
+ if ((error = nfs_request_add_header(req)))
+ break;
+
+ if ((error = nfs_request_send(req, wait)))
+ break;
+ if (!wait)
+ break;
+
+ nfs_request_wait(req);
+ if ((error = nfs_request_finish(req, nmrepp, status)))
+ break;
+ } while (req->r_flags & R_RESTART);
+
+ FSDBG_BOT(273, R_XID32(req->r_xid), NULL, NFSPROC_NULL, error);
+
+ nfs_gss_clnt_ctx_unref(req);
+ nfs_request_rele(req);
+
+ return (error);
+}
+
+/*
+ * Create and start an asynchronous NFS request.
+ */
+int
+nfs_request_async(
+ nfsnode_t np,
+ mount_t mp, /* used only if !np */
+ struct nfsm_chain *nmrest,
+ int procnum,
+ thread_t thd,
+ kauth_cred_t cred,
+ struct nfsreq_secinfo_args *si,
+ int flags,
+ struct nfsreq_cbinfo *cb,
+ struct nfsreq **reqp)
+{
+ struct nfsreq *req;
+ struct nfsmount *nmp;
+ int error, sent;
+
+ error = nfs_request_create(np, mp, nmrest, procnum, thd, cred, reqp);
+ req = *reqp;
+ FSDBG(274, (req ? R_XID32(req->r_xid) : 0), np, procnum, error);
+ if (error)
+ return (error);
+ req->r_flags |= (flags & R_OPTMASK);
+ req->r_flags |= R_ASYNC;
+ if (si)
+ req->r_secinfo = *si;
+ if (cb)
+ req->r_callback = *cb;
+ error = nfs_request_add_header(req);
+ if (!error) {
+ req->r_flags |= R_WAITSENT;
+ if (req->r_callback.rcb_func)
+ nfs_request_ref(req, 0);
+ error = nfs_request_send(req, 1);
+ lck_mtx_lock(&req->r_mtx);
+ if (!error && !(req->r_flags & R_SENT) && req->r_callback.rcb_func) {
+ /* make sure to wait until this async I/O request gets sent */
+ int slpflag = (req->r_nmp && NMFLAG(req->r_nmp, INTR) && req->r_thread && !(req->r_flags & R_NOINTR)) ? PCATCH : 0;
+ struct timespec ts = { 2, 0 };
+ while (!(req->r_flags & R_SENT)) {
+ nmp = req->r_nmp;
+ if ((req->r_flags & R_RESENDQ) && !nfs_mount_gone(nmp)) {
+ lck_mtx_lock(&nmp->nm_lock);
+ if ((nmp->nm_state & NFSSTA_RECOVER) && (req->r_rchain.tqe_next != NFSREQNOLIST)) {
+ /*
+ * It's not going to get off the resend queue if we're in recovery.
+ * So, just take it off ourselves. We could be holding mount state
+ * busy and thus holding up the start of recovery.
+ */
+ TAILQ_REMOVE(&nmp->nm_resendq, req, r_rchain);
+ req->r_rchain.tqe_next = NFSREQNOLIST;
+ if (req->r_flags & R_RESENDQ)
+ req->r_flags &= ~R_RESENDQ;
+ lck_mtx_unlock(&nmp->nm_lock);
+ req->r_flags |= R_SENDING;
+ lck_mtx_unlock(&req->r_mtx);
+ error = nfs_send(req, 1);
+ /* Remove the R_RESENDQ reference */
+ nfs_request_rele(req);
+ lck_mtx_lock(&req->r_mtx);
+ if (error)
+ break;
+ continue;
+ }
+ lck_mtx_unlock(&nmp->nm_lock);
}
+ if ((error = nfs_sigintr(req->r_nmp, req, req->r_thread, 0)))
+ break;
+ msleep(req, &req->r_mtx, slpflag | (PZERO - 1), "nfswaitsent", &ts);
+ slpflag = 0;
}
- /* Reconnect for all errors. We may be receiving
- * soft/hard/blocking errors because of a network
- * change.
- * XXX: we should rate limit or delay this
- * to once every N attempts or something.
- * although TCP doesn't seem to.
- */
- if (error) {
- error2 = nfs_sndlock(rep);
- if (!error2) {
- error2 = nfs_reconnect(rep);
- if (error2)
- error = error2;
- else if (!rep->r_nmp) /* if unmounted then bailout */
- error = ENXIO;
- else
- so = rep->r_nmp->nm_so;
- nfs_sndunlock(rep);
- } else {
- error = error2;
- }
+ }
+ sent = req->r_flags & R_SENT;
+ lck_mtx_unlock(&req->r_mtx);
+ if (error && req->r_callback.rcb_func && !sent) {
+ nfs_request_rele(req);
+ }
+ }
+ FSDBG(274, R_XID32(req->r_xid), np, procnum, error);
+ if (error || req->r_callback.rcb_func)
+ nfs_request_rele(req);
+
+ return (error);
+}
+
+/*
+ * Wait for and finish an asynchronous NFS request.
+ */
+int
+nfs_request_async_finish(
+ struct nfsreq *req,
+ struct nfsm_chain *nmrepp,
+ u_int64_t *xidp,
+ int *status)
+{
+ int error = 0, asyncio = req->r_callback.rcb_func ? 1 : 0;
+ struct nfsmount *nmp;
+
+ lck_mtx_lock(&req->r_mtx);
+ if (!asyncio)
+ req->r_flags |= R_ASYNCWAIT;
+ while (req->r_flags & R_RESENDQ) { /* wait until the request is off the resend queue */
+ struct timespec ts = { 2, 0 };
+
+ if ((nmp = req->r_nmp)) {
+ lck_mtx_lock(&nmp->nm_lock);
+ if ((nmp->nm_state & NFSSTA_RECOVER) && (req->r_rchain.tqe_next != NFSREQNOLIST)) {
+ /*
+ * It's not going to get off the resend queue if we're in recovery.
+ * So, just take it off ourselves. We could be holding mount state
+ * busy and thus holding up the start of recovery.
+ */
+ TAILQ_REMOVE(&nmp->nm_resendq, req, r_rchain);
+ req->r_rchain.tqe_next = NFSREQNOLIST;
+ if (req->r_flags & R_RESENDQ)
+ req->r_flags &= ~R_RESENDQ;
+ /* Remove the R_RESENDQ reference */
+ assert(req->r_refs > 0);
+ req->r_refs--;
+ lck_mtx_unlock(&nmp->nm_lock);
+ break;
+ }
+ lck_mtx_unlock(&nmp->nm_lock);
+ }
+ if ((error = nfs_sigintr(req->r_nmp, req, req->r_thread, 0)))
+ break;
+ msleep(req, &req->r_mtx, PZERO-1, "nfsresendqwait", &ts);
+ }
+ lck_mtx_unlock(&req->r_mtx);
+
+ if (!error) {
+ nfs_request_wait(req);
+ error = nfs_request_finish(req, nmrepp, status);
+ }
+
+ while (!error && (req->r_flags & R_RESTART)) {
+ if (asyncio) {
+ assert(req->r_achain.tqe_next == NFSREQNOLIST);
+ lck_mtx_lock(&req->r_mtx);
+ req->r_flags &= ~R_IOD;
+ if (req->r_resendtime) { /* send later */
+ nfs_asyncio_resend(req);
+ lck_mtx_unlock(&req->r_mtx);
+ return (EINPROGRESS);
}
- } while (error == EWOULDBLOCK);
+ lck_mtx_unlock(&req->r_mtx);
+ }
+ req->r_error = 0;
+ req->r_flags &= ~R_RESTART;
+ if ((error = nfs_request_add_header(req)))
+ break;
+ if ((error = nfs_request_send(req, !asyncio)))
+ break;
+ if (asyncio)
+ return (EINPROGRESS);
+ nfs_request_wait(req);
+ if ((error = nfs_request_finish(req, nmrepp, status)))
+ break;
+ }
+ if (xidp)
+ *xidp = req->r_xid;
+
+ FSDBG(275, R_XID32(req->r_xid), req->r_np, req->r_procnum, error);
+ nfs_request_rele(req);
+ return (error);
+}
+
+/*
+ * Cancel a pending asynchronous NFS request.
+ */
+void
+nfs_request_async_cancel(struct nfsreq *req)
+{
+ FSDBG(275, R_XID32(req->r_xid), req->r_np, req->r_procnum, 0xD1ED1E);
+ nfs_request_rele(req);
+}
+
+/*
+ * Flag a request as being terminated.
+ */
+void
+nfs_softterm(struct nfsreq *req)
+{
+ struct nfsmount *nmp = req->r_nmp;
+ req->r_flags |= R_SOFTTERM;
+ req->r_error = ETIMEDOUT;
+ if (!(req->r_flags & R_CWND) || nfs_mount_gone(nmp))
+ return;
+ /* update congestion window */
+ req->r_flags &= ~R_CWND;
+ lck_mtx_lock(&nmp->nm_lock);
+ FSDBG(532, R_XID32(req->r_xid), req, nmp->nm_sent, nmp->nm_cwnd);
+ nmp->nm_sent -= NFS_CWNDSCALE;
+ if ((nmp->nm_sent < nmp->nm_cwnd) && !TAILQ_EMPTY(&nmp->nm_cwndq)) {
+ /* congestion window is open, poke the cwnd queue */
+ struct nfsreq *req2 = TAILQ_FIRST(&nmp->nm_cwndq);
+ TAILQ_REMOVE(&nmp->nm_cwndq, req2, r_cchain);
+ req2->r_cchain.tqe_next = NFSREQNOLIST;
+ wakeup(req2);
+ }
+ lck_mtx_unlock(&nmp->nm_lock);
+}
+
+/*
+ * Ensure req isn't in use by the timer, then dequeue it.
+ */
+void
+nfs_reqdequeue(struct nfsreq *req)
+{
+ lck_mtx_lock(nfs_request_mutex);
+ while (req->r_lflags & RL_BUSY) {
+ req->r_lflags |= RL_WAITING;
+ msleep(&req->r_lflags, nfs_request_mutex, PSOCK, "reqdeq", NULL);
}
-shutout:
- if (error) {
- mbuf_freem(*mp);
- *mp = NULL;
+ if (req->r_lflags & RL_QUEUED) {
+ TAILQ_REMOVE(&nfs_reqq, req, r_chain);
+ req->r_lflags &= ~RL_QUEUED;
}
- return (error);
+ lck_mtx_unlock(nfs_request_mutex);
}
/*
- * Implement receipt of reply on a socket.
- * We must search through the list of received datagrams matching them
- * with outstanding requests using the xid, until ours is found.
+ * Busy (lock) a nfsreq, used by the nfs timer to make sure it's not
+ * free()'d out from under it.
*/
-/* ARGSUSED */
-int
-nfs_reply(myrep)
- struct nfsreq *myrep;
-{
- struct nfsreq *rep;
- struct nfsmount *nmp = myrep->r_nmp;
- long t1;
- mbuf_t mrep, md;
- u_long rxid, *tl;
- caddr_t dpos, cp2;
- int error;
+void
+nfs_reqbusy(struct nfsreq *req)
+{
+ if (req->r_lflags & RL_BUSY)
+ panic("req locked");
+ req->r_lflags |= RL_BUSY;
+}
+
+/*
+ * Unbusy the nfsreq passed in, return the next nfsreq in the chain busied.
+ */
+struct nfsreq *
+nfs_reqnext(struct nfsreq *req)
+{
+ struct nfsreq * nextreq;
+ if (req == NULL)
+ return (NULL);
/*
- * Loop around until we get our own reply
+ * We need to get and busy the next req before signalling the
+ * current one, otherwise wakeup() may block us and we'll race to
+ * grab the next req.
*/
- for (;;) {
- /*
- * Lock against other receivers so that I don't get stuck in
- * sbwait() after someone else has received my reply for me.
- * Also necessary for connection based protocols to avoid
- * race conditions during a reconnect.
- * If nfs_rcvlock() returns EALREADY, that means that
- * the reply has already been recieved by another
- * process and we can return immediately. In this
- * case, the lock is not taken to avoid races with
- * other processes.
- */
- error = nfs_rcvlock(myrep);
- if (error == EALREADY)
- return (0);
- if (error)
- return (error);
-
- /*
- * If we slept after putting bits otw, then reply may have
- * arrived. In which case returning is required, or we
- * would hang trying to nfs_receive an already received reply.
- */
- if (myrep->r_mrep != NULL) {
- nfs_rcvunlock(myrep);
- FSDBG(530, myrep->r_xid, myrep, myrep->r_nmp, -1);
- return (0);
+ nextreq = TAILQ_NEXT(req, r_chain);
+ if (nextreq != NULL)
+ nfs_reqbusy(nextreq);
+ /* unbusy and signal. */
+ req->r_lflags &= ~RL_BUSY;
+ if (req->r_lflags & RL_WAITING) {
+ req->r_lflags &= ~RL_WAITING;
+ wakeup(&req->r_lflags);
+ }
+ return (nextreq);
+}
+
+/*
+ * NFS request queue timer routine
+ *
+ * Scan the NFS request queue for any requests that have timed out.
+ *
+ * Alert the system of unresponsive servers.
+ * Mark expired requests on soft mounts as terminated.
+ * For UDP, mark/signal requests for retransmission.
+ */
+void
+nfs_request_timer(__unused void *param0, __unused void *param1)
+{
+ struct nfsreq *req;
+ struct nfsmount *nmp;
+ int timeo, maxtime, finish_asyncio, error;
+ struct timeval now;
+ TAILQ_HEAD(nfs_mount_pokeq, nfsmount) nfs_mount_poke_queue;
+
+restart:
+ lck_mtx_lock(nfs_request_mutex);
+ req = TAILQ_FIRST(&nfs_reqq);
+ if (req == NULL) { /* no requests - turn timer off */
+ nfs_request_timer_on = 0;
+ lck_mtx_unlock(nfs_request_mutex);
+ return;
+ }
+
+ nfs_reqbusy(req);
+ TAILQ_INIT(&nfs_mount_poke_queue);
+
+ microuptime(&now);
+ for ( ; req != NULL ; req = nfs_reqnext(req)) {
+ nmp = req->r_nmp;
+ if (nmp == NULL) {
+ NFS_SOCK_DBG("Found a request with out a mount!\n");
+ continue;
}
- /*
- * Get the next Rpc reply off the socket. Assume myrep->r_nmp
- * is still intact by checks done in nfs_rcvlock.
- */
- error = nfs_receive(myrep, &mrep);
- /*
- * Bailout asap if nfsmount struct gone (unmounted).
- */
- if (!myrep->r_nmp) {
- FSDBG(530, myrep->r_xid, myrep, nmp, -2);
- if (mrep)
- mbuf_freem(mrep);
- return (ENXIO);
+ if (req->r_error || req->r_nmrep.nmc_mhead)
+ continue;
+ if ((error = nfs_sigintr(nmp, req, req->r_thread, 0))) {
+ if (req->r_callback.rcb_func != NULL) {
+ /* async I/O RPC needs to be finished */
+ lck_mtx_lock(&req->r_mtx);
+ req->r_error = error;
+ finish_asyncio = !(req->r_flags & R_WAITSENT);
+ wakeup(req);
+ lck_mtx_unlock(&req->r_mtx);
+ if (finish_asyncio)
+ nfs_asyncio_finish(req);
+ }
+ continue;
}
- if (error) {
- FSDBG(530, myrep->r_xid, myrep, nmp, error);
- nfs_rcvunlock(myrep);
- /* Bailout asap if nfsmount struct gone (unmounted). */
- if (!myrep->r_nmp) {
- if (mrep)
- mbuf_freem(mrep);
- return (ENXIO);
- }
+ lck_mtx_lock(&req->r_mtx);
- /*
- * Ignore routing errors on connectionless protocols??
- */
- if (NFSIGNORE_SOERROR(nmp->nm_sotype, error)) {
- if (nmp->nm_so) {
- int clearerror;
- int optlen = sizeof(clearerror);
- sock_getsockopt(nmp->nm_so, SOL_SOCKET, SO_ERROR, &clearerror, &optlen);
- }
+ if (nmp->nm_tprintf_initial_delay &&
+ ((req->r_rexmit > 2) || (req->r_flags & R_RESENDERR)) &&
+ ((req->r_lastmsg + nmp->nm_tprintf_delay) < now.tv_sec)) {
+ req->r_lastmsg = now.tv_sec;
+ nfs_down(req->r_nmp, req->r_thread, 0, NFSSTA_TIMEO,
+ "not responding", 1);
+ req->r_flags |= R_TPRINTFMSG;
+ lck_mtx_lock(&nmp->nm_lock);
+ if (!(nmp->nm_state & NFSSTA_MOUNTED)) {
+ lck_mtx_unlock(&nmp->nm_lock);
+ /* we're not yet completely mounted and */
+ /* we can't complete an RPC, so we fail */
+ OSAddAtomic64(1, &nfsstats.rpctimeouts);
+ nfs_softterm(req);
+ finish_asyncio = ((req->r_callback.rcb_func != NULL) && !(req->r_flags & R_WAITSENT));
+ wakeup(req);
+ lck_mtx_unlock(&req->r_mtx);
+ if (finish_asyncio)
+ nfs_asyncio_finish(req);
continue;
}
- if (mrep)
- mbuf_freem(mrep);
- return (error);
+ lck_mtx_unlock(&nmp->nm_lock);
}
/*
- * We assume all is fine, but if we did not have an error
- * and mrep is 0, better not dereference it. nfs_receive
- * calls soreceive which carefully sets error=0 when it got
- * errors on sbwait (tsleep). In most cases, I assume that's
- * so we could go back again. In tcp case, EPIPE is returned.
- * In udp, case nfs_receive gets back here with no error and no
- * mrep. Is the right fix to have soreceive check for process
- * aborted after sbwait and return something non-zero? Should
- * nfs_receive give an EPIPE? Too risky to play with those
- * two this late in game for a shutdown problem. Instead,
- * just check here and get out. (ekn)
- */
- if (!mrep) {
- nfs_rcvunlock(myrep);
- FSDBG(530, myrep->r_xid, myrep, nmp, -3);
- return (ENXIO); /* sounds good */
- }
-
- /*
- * Get the xid and check that it is an rpc reply
+ * Put a reasonable limit on the maximum timeout,
+ * and reduce that limit when soft mounts get timeouts or are in reconnect.
*/
- md = mrep;
- dpos = mbuf_data(md);
- nfsm_dissect(tl, u_long *, 2*NFSX_UNSIGNED);
- rxid = *tl++;
- if (*tl != rpc_reply) {
- OSAddAtomic(1, (SInt32*)&nfsstats.rpcinvalid);
- mbuf_freem(mrep);
-nfsmout:
- if (nmp->nm_state & NFSSTA_RCVLOCK)
- nfs_rcvunlock(myrep);
- continue;
- }
+ if (!(NMFLAG(nmp, SOFT) || (req->r_flags & R_SOFT)) && !nfs_can_squish(nmp))
+ maxtime = NFS_MAXTIMEO;
+ else if ((req->r_flags & (R_SETUP|R_RECOVER)) ||
+ ((nmp->nm_reconnect_start <= 0) || ((now.tv_sec - nmp->nm_reconnect_start) < 8)))
+ maxtime = (NFS_MAXTIMEO / (nmp->nm_timeouts+1))/2;
+ else
+ maxtime = NFS_MINTIMEO/4;
/*
- * Loop through the request list to match up the reply
- * Iff no match, just drop the datagram
+ * Check for request timeout.
*/
- TAILQ_FOREACH(rep, &nfs_reqq, r_chain) {
- if (rep->r_mrep == NULL && rxid == rep->r_xid) {
- /* Found it.. */
- rep->r_mrep = mrep;
- rep->r_md = md;
- rep->r_dpos = dpos;
+ if (req->r_rtt >= 0) {
+ req->r_rtt++;
+ lck_mtx_lock(&nmp->nm_lock);
+ if (req->r_flags & R_RESENDERR) {
+ /* with resend errors, retry every few seconds */
+ timeo = 4*hz;
+ } else {
+ if (req->r_procnum == NFSPROC_NULL && req->r_gss_ctx != NULL)
+ timeo = NFS_MINIDEMTIMEO; // gss context setup
+ else if (NMFLAG(nmp, DUMBTIMER))
+ timeo = nmp->nm_timeo;
+ else
+ timeo = NFS_RTO(nmp, proct[req->r_procnum]);
+
+ /* ensure 62.5 ms floor */
+ while (16 * timeo < hz)
+ timeo *= 2;
+ if (nmp->nm_timeouts > 0)
+ timeo *= nfs_backoff[nmp->nm_timeouts - 1];
+ }
+ /* limit timeout to max */
+ if (timeo > maxtime)
+ timeo = maxtime;
+ if (req->r_rtt <= timeo) {
+ NFS_SOCK_DBG("nfs timeout: req time %d and timeo is %d continue\n", req->r_rtt, timeo);
+ lck_mtx_unlock(&nmp->nm_lock);
+ lck_mtx_unlock(&req->r_mtx);
+ continue;
+ }
+ /* The request has timed out */
+ NFS_SOCK_DBG("nfs timeout: proc %d %d xid %llx rtt %d to %d # %d, t %ld/%d\n",
+ req->r_procnum, proct[req->r_procnum],
+ req->r_xid, req->r_rtt, timeo, nmp->nm_timeouts,
+ (now.tv_sec - req->r_start)*NFS_HZ, maxtime);
+ if (nmp->nm_timeouts < 8)
+ nmp->nm_timeouts++;
+ if (nfs_mount_check_dead_timeout(nmp)) {
+ /* Unbusy this request */
+ req->r_lflags &= ~RL_BUSY;
+ if (req->r_lflags & RL_WAITING) {
+ req->r_lflags &= ~RL_WAITING;
+ wakeup(&req->r_lflags);
+ }
+ lck_mtx_unlock(&req->r_mtx);
+
+ /* No need to poke this mount */
+ if (nmp->nm_sockflags & NMSOCK_POKE) {
+ nmp->nm_sockflags &= ~NMSOCK_POKE;
+ TAILQ_REMOVE(&nfs_mount_poke_queue, nmp, nm_pokeq);
+ }
+ /* Release our lock state, so we can become a zombie */
+ lck_mtx_unlock(nfs_request_mutex);
+
/*
- * If we're tracking the round trip time
- * then we update the circular log here
- * with the stats from our current request.
+ * Note nfs_mount_make zombie(nmp) must be
+ * called with nm_lock held. After doing some
+ * work we release nm_lock in
+ * nfs_make_mount_zombie with out acquiring any
+ * other locks. (Later, in nfs_mount_zombie we
+ * will acquire nfs_request_mutex, r_mtx,
+ * nm_lock in that order). So we should not be
+ * introducing deadlock here. We take a reference
+ * on the mount so that its still there when we
+ * release the lock.
*/
- if (nfsrtton) {
- struct rttl *rt;
-
- rt = &nfsrtt.rttl[nfsrtt.pos];
- rt->proc = rep->r_procnum;
- rt->rto = NFS_RTO(nmp, proct[rep->r_procnum]);
- rt->sent = nmp->nm_sent;
- rt->cwnd = nmp->nm_cwnd;
- if (proct[rep->r_procnum] == 0)
- panic("nfs_reply: proct[%d] is zero", rep->r_procnum);
- rt->srtt = nmp->nm_srtt[proct[rep->r_procnum] - 1];
- rt->sdrtt = nmp->nm_sdrtt[proct[rep->r_procnum] - 1];
- rt->fsid = vfs_statfs(nmp->nm_mountp)->f_fsid;
- microtime(&rt->tstamp); // XXX unused
- if (rep->r_flags & R_TIMING)
- rt->rtt = rep->r_rtt;
- else
- rt->rtt = 1000000;
- nfsrtt.pos = (nfsrtt.pos + 1) % NFSRTTLOGSIZ;
- }
+ nmp->nm_ref++;
+ nfs_mount_make_zombie(nmp);
+ lck_mtx_unlock(&nmp->nm_lock);
+ nfs_mount_rele(nmp);
+
/*
- * Update congestion window.
- * Do the additive increase of
- * one rpc/rtt.
+ * All the request for this mount have now been
+ * removed from the request queue. Restart to
+ * process the remaining mounts
*/
- FSDBG(530, rep->r_xid, rep, nmp->nm_sent,
- nmp->nm_cwnd);
- if (nmp->nm_cwnd <= nmp->nm_sent) {
- nmp->nm_cwnd +=
- (NFS_CWNDSCALE * NFS_CWNDSCALE +
- (nmp->nm_cwnd >> 1)) / nmp->nm_cwnd;
- if (nmp->nm_cwnd > NFS_MAXCWND)
- nmp->nm_cwnd = NFS_MAXCWND;
- }
- if (rep->r_flags & R_SENT) {
- rep->r_flags &= ~R_SENT;
- nmp->nm_sent -= NFS_CWNDSCALE;
- }
+ goto restart;
+ }
+
+ /* if it's been a few seconds, try poking the socket */
+ if ((nmp->nm_sotype == SOCK_STREAM) &&
+ ((now.tv_sec - req->r_start) >= 3) &&
+ !(nmp->nm_sockflags & (NMSOCK_POKE|NMSOCK_UNMOUNT)) &&
+ (nmp->nm_sockflags & NMSOCK_READY)) {
+ nmp->nm_sockflags |= NMSOCK_POKE;
/*
- * Update rtt using a gain of 0.125 on the mean
- * and a gain of 0.25 on the deviation.
+ * We take a ref on the mount so that we know the mount will still be there
+ * when we process the nfs_mount_poke_queue. An unmount request will block
+ * in nfs_mount_drain_and_cleanup until after the poke is finished. We release
+ * the reference after calling nfs_sock_poke below;
*/
- if (rep->r_flags & R_TIMING) {
- /*
- * Since the timer resolution of
- * NFS_HZ is so course, it can often
- * result in r_rtt == 0. Since
- * r_rtt == N means that the actual
- * rtt is between N+dt and N+2-dt ticks,
- * add 1.
- */
- if (proct[rep->r_procnum] == 0)
- panic("nfs_reply: proct[%d] is zero", rep->r_procnum);
- t1 = rep->r_rtt + 1;
- t1 -= (NFS_SRTT(rep) >> 3);
- NFS_SRTT(rep) += t1;
- if (t1 < 0)
- t1 = -t1;
- t1 -= (NFS_SDRTT(rep) >> 2);
- NFS_SDRTT(rep) += t1;
- }
- nmp->nm_timeouts = 0;
- break;
+ nmp->nm_ref++;
+ TAILQ_INSERT_TAIL(&nfs_mount_poke_queue, nmp, nm_pokeq);
+ }
+ lck_mtx_unlock(&nmp->nm_lock);
+ }
+
+ /* For soft mounts (& SETUPs/RECOVERs), check for too many retransmits/timeout. */
+ if ((NMFLAG(nmp, SOFT) || (req->r_flags & (R_SETUP|R_RECOVER|R_SOFT))) &&
+ ((req->r_rexmit >= req->r_retry) || /* too many */
+ ((now.tv_sec - req->r_start)*NFS_HZ > maxtime))) { /* too long */
+ OSAddAtomic64(1, &nfsstats.rpctimeouts);
+ lck_mtx_lock(&nmp->nm_lock);
+ if (!(nmp->nm_state & NFSSTA_TIMEO)) {
+ lck_mtx_unlock(&nmp->nm_lock);
+ /* make sure we note the unresponsive server */
+ /* (maxtime may be less than tprintf delay) */
+ nfs_down(req->r_nmp, req->r_thread, 0, NFSSTA_TIMEO,
+ "not responding", 1);
+ req->r_lastmsg = now.tv_sec;
+ req->r_flags |= R_TPRINTFMSG;
+ } else {
+ lck_mtx_unlock(&nmp->nm_lock);
+ }
+ if (req->r_flags & R_NOINTR) {
+ /* don't terminate nointr requests on timeout */
+ lck_mtx_unlock(&req->r_mtx);
+ continue;
}
+ NFS_SOCK_DBG("nfs timer TERMINATE: p %d x 0x%llx f 0x%x rtt %d t %ld\n",
+ req->r_procnum, req->r_xid, req->r_flags, req->r_rtt,
+ now.tv_sec - req->r_start);
+ nfs_softterm(req);
+ finish_asyncio = ((req->r_callback.rcb_func != NULL) && !(req->r_flags & R_WAITSENT));
+ wakeup(req);
+ lck_mtx_unlock(&req->r_mtx);
+ if (finish_asyncio)
+ nfs_asyncio_finish(req);
+ continue;
+ }
+
+ /* for TCP, only resend if explicitly requested */
+ if ((nmp->nm_sotype == SOCK_STREAM) && !(req->r_flags & R_MUSTRESEND)) {
+ if (++req->r_rexmit > NFS_MAXREXMIT)
+ req->r_rexmit = NFS_MAXREXMIT;
+ req->r_rtt = 0;
+ lck_mtx_unlock(&req->r_mtx);
+ continue;
}
- nfs_rcvunlock(myrep);
+
/*
- * If not matched to a request, drop it.
- * If it's mine, get out.
+ * The request needs to be (re)sent. Kick the requester to resend it.
+ * (unless it's already marked as needing a resend)
*/
- if (rep == 0) {
- OSAddAtomic(1, (SInt32*)&nfsstats.rpcunexpected);
- mbuf_freem(mrep);
- } else if (rep == myrep) {
- if (rep->r_mrep == NULL)
- panic("nfs_reply: nil r_mrep");
- return (0);
+ if ((req->r_flags & R_MUSTRESEND) && (req->r_rtt == -1)) {
+ lck_mtx_unlock(&req->r_mtx);
+ continue;
}
- FSDBG(530, myrep->r_xid, myrep, rep,
- rep ? rep->r_xid : myrep->r_flags);
+ NFS_SOCK_DBG("nfs timer mark resend: p %d x 0x%llx f 0x%x rtt %d\n",
+ req->r_procnum, req->r_xid, req->r_flags, req->r_rtt);
+ req->r_flags |= R_MUSTRESEND;
+ req->r_rtt = -1;
+ wakeup(req);
+ if ((req->r_flags & (R_IOD|R_ASYNC|R_ASYNCWAIT|R_SENDING)) == R_ASYNC)
+ nfs_asyncio_resend(req);
+ lck_mtx_unlock(&req->r_mtx);
}
+
+ lck_mtx_unlock(nfs_request_mutex);
+
+ /* poke any sockets */
+ while ((nmp = TAILQ_FIRST(&nfs_mount_poke_queue))) {
+ TAILQ_REMOVE(&nfs_mount_poke_queue, nmp, nm_pokeq);
+ nfs_sock_poke(nmp);
+ nfs_mount_rele(nmp);
+ }
+
+ nfs_interval_timer_start(nfs_request_timer_call, NFS_REQUESTDELAY);
}
/*
- * nfs_request - goes something like this
- * - fill in request struct
- * - links it into list
- * - calls nfs_send() for first transmit
- * - calls nfs_receive() to get reply
- * - break down rpc header and return with nfs reply pointed to
- * by mrep or error
- * nb: always frees up mreq mbuf list
+ * check a thread's proc for the "noremotehang" flag.
*/
int
-nfs_request(vp, mp, mrest, procnum, procp, cred, mrp, mdp, dposp, xidp)
- vnode_t vp;
- mount_t mp;
- mbuf_t mrest;
- int procnum;
- proc_t procp;
- kauth_cred_t cred;
- mbuf_t *mrp;
- mbuf_t *mdp;
- caddr_t *dposp;
- u_int64_t *xidp;
-{
- mbuf_t m, mrep, m2;
- struct nfsreq re, *rep;
- u_long *tl;
- int i;
- struct nfsmount *nmp;
- mbuf_t md, mheadend;
- char nickv[RPCX_NICKVERF];
- time_t waituntil;
- caddr_t dpos, cp2;
- int t1, error = 0, mrest_len, auth_len, auth_type;
- int trylater_delay = NFS_TRYLATERDEL, failed_auth = 0;
- int verf_len, verf_type;
- u_long xid;
- char *auth_str, *verf_str;
- NFSKERBKEY_T key; /* save session key */
- int nmsotype;
- struct timeval now;
-
- if (mrp)
- *mrp = NULL;
- if (xidp)
- *xidp = 0;
- nmp = VFSTONFS(mp);
+nfs_noremotehang(thread_t thd)
+{
+ proc_t p = thd ? get_bsdthreadtask_info(thd) : NULL;
+ return (p && proc_noremotehang(p));
+}
- rep = &re;
+/*
+ * Test for a termination condition pending on the process.
+ * This is used to determine if we need to bail on a mount.
+ * ETIMEDOUT is returned if there has been a soft timeout.
+ * EINTR is returned if there is a signal pending that is not being ignored
+ * and the mount is interruptable, or if we are a thread that is in the process
+ * of cancellation (also SIGKILL posted).
+ */
+extern int sigprop[NSIG+1];
+int
+nfs_sigintr(struct nfsmount *nmp, struct nfsreq *req, thread_t thd, int nmplocked)
+{
+ proc_t p;
+ int error = 0;
- if (vp)
- nmp = VFSTONFS(vnode_mount(vp));
- if (nmp == NULL ||
- (nmp->nm_state & (NFSSTA_FORCE|NFSSTA_TIMEO)) ==
- (NFSSTA_FORCE|NFSSTA_TIMEO)) {
- mbuf_freem(mrest);
+ if (!nmp)
return (ENXIO);
- }
- nmsotype = nmp->nm_sotype;
- FSDBG_TOP(531, vp, procnum, nmp, rep);
-
- rep->r_nmp = nmp;
- rep->r_vp = vp;
- rep->r_procp = procp;
- rep->r_procnum = procnum;
- microuptime(&now);
- rep->r_lastmsg = now.tv_sec -
- ((nmp->nm_tprintf_delay) - (nmp->nm_tprintf_initial_delay));
- i = 0;
- m = mrest;
- while (m) {
- i += mbuf_len(m);
- m = mbuf_next(m);
+ if (req && (req->r_flags & R_SOFTTERM))
+ return (ETIMEDOUT); /* request has been terminated. */
+ if (req && (req->r_flags & R_NOINTR))
+ thd = NULL; /* don't check for signal on R_NOINTR */
+
+ if (!nmplocked)
+ lck_mtx_lock(&nmp->nm_lock);
+ if (nmp->nm_state & NFSSTA_FORCE) {
+ /* If a force unmount is in progress then fail. */
+ error = EIO;
+ } else if (vfs_isforce(nmp->nm_mountp)) {
+ /* Someone is unmounting us, go soft and mark it. */
+ NFS_BITMAP_SET(nmp->nm_flags, NFS_MFLAG_SOFT);
+ nmp->nm_state |= NFSSTA_FORCE;
}
- mrest_len = i;
- /*
- * Get the RPC header with authorization.
- */
-kerbauth:
- nmp = vp ? VFSTONFS(vnode_mount(vp)) : rep->r_nmp;
- if (!nmp) {
- FSDBG_BOT(531, error, rep->r_xid, nmp, rep);
- mbuf_freem(mrest);
- return (ENXIO);
- }
- verf_str = auth_str = (char *)0;
- if (nmp->nm_flag & NFSMNT_KERB) {
- verf_str = nickv;
- verf_len = sizeof (nickv);
- auth_type = RPCAUTH_KERB4;
- bzero((caddr_t)key, sizeof (key));
- if (failed_auth || nfs_getnickauth(nmp, cred, &auth_str,
- &auth_len, verf_str, verf_len)) {
- nmp = vp ? VFSTONFS(vnode_mount(vp)) : rep->r_nmp;
- if (!nmp) {
- FSDBG_BOT(531, 2, vp, error, rep);
- mbuf_freem(mrest);
- return (ENXIO);
- }
- error = nfs_getauth(nmp, rep, cred, &auth_str,
- &auth_len, verf_str, &verf_len, key);
- nmp = vp ? VFSTONFS(vnode_mount(vp)) : rep->r_nmp;
- if (!error && !nmp)
- error = ENXIO;
- if (error) {
- FSDBG_BOT(531, 2, vp, error, rep);
- mbuf_freem(mrest);
- return (error);
- }
- }
- } else {
- auth_type = RPCAUTH_UNIX;
- if (cred->cr_ngroups < 1)
- panic("nfsreq nogrps");
- auth_len = ((((cred->cr_ngroups - 1) > nmp->nm_numgrps) ?
- nmp->nm_numgrps : (cred->cr_ngroups - 1)) << 2) +
- 5 * NFSX_UNSIGNED;
- }
- error = nfsm_rpchead(cred, nmp->nm_flag, procnum, auth_type, auth_len,
- auth_str, verf_len, verf_str, mrest, mrest_len, &mheadend, &xid, &m);
- if (auth_str)
- _FREE(auth_str, M_TEMP);
- if (error) {
- mbuf_freem(mrest);
- FSDBG_BOT(531, error, rep->r_xid, nmp, rep);
- return (error);
- }
- if (xidp)
- *xidp = ntohl(xid) + ((u_int64_t)nfs_xidwrap << 32);
+ /* Check if the mount is marked dead. */
+ if (!error && (nmp->nm_state & NFSSTA_DEAD))
+ error = ENXIO;
/*
- * For stream protocols, insert a Sun RPC Record Mark.
+ * If the mount is hung and we've requested not to hang
+ * on remote filesystems, then bail now.
*/
- if (nmsotype == SOCK_STREAM) {
- error = mbuf_prepend(&m, NFSX_UNSIGNED, MBUF_WAITOK);
- if (error) {
- mbuf_freem(m);
- FSDBG_BOT(531, error, rep->r_xid, nmp, rep);
- return (error);
- }
- *((u_long*)mbuf_data(m)) =
- htonl(0x80000000 | (mbuf_pkthdr_len(m) - NFSX_UNSIGNED));
- }
- rep->r_mreq = m;
- rep->r_xid = xid;
-tryagain:
- nmp = vp ? VFSTONFS(vnode_mount(vp)) : rep->r_nmp;
- if (nmp && (nmp->nm_flag & NFSMNT_SOFT))
- rep->r_retry = nmp->nm_retry;
- else
- rep->r_retry = NFS_MAXREXMIT + 1; /* past clip limit */
- rep->r_rtt = rep->r_rexmit = 0;
- if (proct[procnum] > 0)
- rep->r_flags = R_TIMING;
- else
- rep->r_flags = 0;
- rep->r_mrep = NULL;
+ if (current_proc() != kernproc &&
+ !error && (nmp->nm_state & NFSSTA_TIMEO) && nfs_noremotehang(thd))
+ error = EIO;
- /*
- * Do the client side RPC.
- */
- OSAddAtomic(1, (SInt32*)&nfsstats.rpcrequests);
- /*
- * Chain request into list of outstanding requests. Be sure
- * to put it LAST so timer finds oldest requests first.
- */
- TAILQ_INSERT_TAIL(&nfs_reqq, rep, r_chain);
+ if (!nmplocked)
+ lck_mtx_unlock(&nmp->nm_lock);
+ if (error)
+ return (error);
+
+ /* may not have a thread for async I/O */
+ if (thd == NULL || current_proc() == kernproc)
+ return (0);
/*
- * If backing off another request or avoiding congestion, don't
- * send this one now but let timer do it. If not timing a request,
- * do it now.
+ * Check if the process is aborted, but don't interrupt if we
+ * were killed by a signal and this is the exiting thread which
+ * is attempting to dump core.
*/
- if (nmp && nmp->nm_so && (nmp->nm_sotype != SOCK_DGRAM ||
- (nmp->nm_flag & NFSMNT_DUMBTIMR) ||
- nmp->nm_sent < nmp->nm_cwnd)) {
- int connrequired = (nmp->nm_sotype == SOCK_STREAM);
-
- if (connrequired)
- error = nfs_sndlock(rep);
-
- /*
- * Set the R_SENT before doing the send in case another thread
- * processes the reply before the nfs_send returns here
- */
- if (!error) {
- if ((rep->r_flags & R_MUSTRESEND) == 0) {
- FSDBG(531, rep->r_xid, rep, nmp->nm_sent,
- nmp->nm_cwnd);
- nmp->nm_sent += NFS_CWNDSCALE;
- rep->r_flags |= R_SENT;
- }
+ if (((p = current_proc()) != kernproc) && current_thread_aborted() &&
+ (!(p->p_acflag & AXSIG) || (p->exit_thread != current_thread()) ||
+ (p->p_sigacts == NULL) ||
+ (p->p_sigacts->ps_sig < 1) || (p->p_sigacts->ps_sig > NSIG) ||
+ !(sigprop[p->p_sigacts->ps_sig] & SA_CORE)))
+ return (EINTR);
- error = mbuf_copym(m, 0, MBUF_COPYALL, MBUF_WAITOK, &m2);
- if (!error)
- error = nfs_send(nmp->nm_so, nmp->nm_nam, m2, rep);
- if (connrequired)
- nfs_sndunlock(rep);
- }
- nmp = vp ? VFSTONFS(vnode_mount(vp)) : rep->r_nmp;
- if (error) {
- if (nmp)
- nmp->nm_sent -= NFS_CWNDSCALE;
- rep->r_flags &= ~R_SENT;
- }
- } else {
- rep->r_rtt = -1;
- }
+ /* mask off thread and process blocked signals. */
+ if (NMFLAG(nmp, INTR) && ((p = get_bsdthreadtask_info(thd))) &&
+ proc_pendingsignals(p, NFSINT_SIGMASK))
+ return (EINTR);
+ return (0);
+}
- /*
- * Wait for the reply from our send or the timer's.
- */
- if (!error || error == EPIPE)
- error = nfs_reply(rep);
+/*
+ * Lock a socket against others.
+ * Necessary for STREAM sockets to ensure you get an entire rpc request/reply
+ * and also to avoid race conditions between the processes with nfs requests
+ * in progress when a reconnect is necessary.
+ */
+int
+nfs_sndlock(struct nfsreq *req)
+{
+ struct nfsmount *nmp = req->r_nmp;
+ int *statep;
+ int error = 0, slpflag = 0;
+ struct timespec ts = { 0, 0 };
- /*
- * RPC done, unlink the request.
- */
- nfs_repdequeue(rep);
+ if (nfs_mount_gone(nmp))
+ return (ENXIO);
- nmp = vp ? VFSTONFS(vnode_mount(vp)) : rep->r_nmp;
+ lck_mtx_lock(&nmp->nm_lock);
+ statep = &nmp->nm_state;
- /*
- * Decrement the outstanding request count.
- */
- if (rep->r_flags & R_SENT) {
- rep->r_flags &= ~R_SENT; /* paranoia */
- if (nmp) {
- FSDBG(531, rep->r_xid, rep, nmp->nm_sent, nmp->nm_cwnd);
- nmp->nm_sent -= NFS_CWNDSCALE;
+ if (NMFLAG(nmp, INTR) && req->r_thread && !(req->r_flags & R_NOINTR))
+ slpflag = PCATCH;
+ while (*statep & NFSSTA_SNDLOCK) {
+ if ((error = nfs_sigintr(nmp, req, req->r_thread, 1)))
+ break;
+ *statep |= NFSSTA_WANTSND;
+ if (nfs_noremotehang(req->r_thread))
+ ts.tv_sec = 1;
+ msleep(statep, &nmp->nm_lock, slpflag | (PZERO - 1), "nfsndlck", &ts);
+ if (slpflag == PCATCH) {
+ slpflag = 0;
+ ts.tv_sec = 2;
}
}
-
- /*
- * If there was a successful reply and a tprintf msg.
- * tprintf a response.
- */
if (!error)
- nfs_up(nmp, procp, NFSSTA_TIMEO,
- (rep->r_flags & R_TPRINTFMSG) ? "is alive again" : NULL);
- mrep = rep->r_mrep;
- md = rep->r_md;
- dpos = rep->r_dpos;
- if (!error && !nmp)
- error = ENXIO;
- if (error) {
- mbuf_freem(rep->r_mreq);
- FSDBG_BOT(531, error, rep->r_xid, nmp, rep);
- return (error);
- }
-
- /*
- * break down the rpc header and check if ok
- */
- nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED);
- if (*tl++ == rpc_msgdenied) {
- if (*tl == rpc_mismatch)
- error = EOPNOTSUPP;
- else if ((nmp->nm_flag & NFSMNT_KERB) && *tl++ == rpc_autherr) {
- if (!failed_auth) {
- failed_auth++;
- error = mbuf_setnext(mheadend, NULL);
- mbuf_freem(mrep);
- mbuf_freem(rep->r_mreq);
- if (!error)
- goto kerbauth;
- printf("nfs_request: mbuf_setnext failed\n");
- } else
- error = EAUTH;
- } else
- error = EACCES;
- mbuf_freem(mrep);
- mbuf_freem(rep->r_mreq);
- FSDBG_BOT(531, error, rep->r_xid, nmp, rep);
- return (error);
- }
-
- /*
- * Grab any Kerberos verifier, otherwise just throw it away.
- */
- verf_type = fxdr_unsigned(int, *tl++);
- i = fxdr_unsigned(int, *tl);
- if ((nmp->nm_flag & NFSMNT_KERB) && verf_type == RPCAUTH_KERB4) {
- error = nfs_savenickauth(nmp, cred, i, key, &md, &dpos, mrep);
- if (error)
- goto nfsmout;
- } else if (i > 0)
- nfsm_adv(nfsm_rndup(i));
- nfsm_dissect(tl, u_long *, NFSX_UNSIGNED);
- /* 0 == ok */
- if (*tl == 0) {
- nfsm_dissect(tl, u_long *, NFSX_UNSIGNED);
- if (*tl != 0) {
- error = fxdr_unsigned(int, *tl);
- if ((nmp->nm_flag & NFSMNT_NFSV3) &&
- error == NFSERR_TRYLATER) {
- mbuf_freem(mrep);
- error = 0;
- microuptime(&now);
- waituntil = now.tv_sec + trylater_delay;
- while (now.tv_sec < waituntil) {
- tsleep((caddr_t)&lbolt, PSOCK, "nfstrylater", 0);
- microuptime(&now);
- }
- trylater_delay *= 2;
- if (trylater_delay > 60)
- trylater_delay = 60;
- goto tryagain;
- }
+ *statep |= NFSSTA_SNDLOCK;
+ lck_mtx_unlock(&nmp->nm_lock);
+ return (error);
+}
- /*
- * If the File Handle was stale, invalidate the
- * lookup cache, just in case.
- */
- if ((error == ESTALE) && vp)
- cache_purge(vp);
- if (nmp->nm_flag & NFSMNT_NFSV3) {
- *mrp = mrep;
- *mdp = md;
- *dposp = dpos;
- error |= NFSERR_RETERR;
- } else {
- mbuf_freem(mrep);
- error &= ~NFSERR_RETERR;
- }
- mbuf_freem(rep->r_mreq);
- FSDBG_BOT(531, error, rep->r_xid, nmp, rep);
- return (error);
- }
+/*
+ * Unlock the stream socket for others.
+ */
+void
+nfs_sndunlock(struct nfsreq *req)
+{
+ struct nfsmount *nmp = req->r_nmp;
+ int *statep, wake = 0;
- *mrp = mrep;
- *mdp = md;
- *dposp = dpos;
- mbuf_freem(rep->r_mreq);
- FSDBG_BOT(531, 0xf0f0f0f0, rep->r_xid, nmp, rep);
- return (0);
+ if (!nmp)
+ return;
+ lck_mtx_lock(&nmp->nm_lock);
+ statep = &nmp->nm_state;
+ if ((*statep & NFSSTA_SNDLOCK) == 0)
+ panic("nfs sndunlock");
+ *statep &= ~(NFSSTA_SNDLOCK|NFSSTA_SENDING);
+ if (*statep & NFSSTA_WANTSND) {
+ *statep &= ~NFSSTA_WANTSND;
+ wake = 1;
}
- mbuf_freem(mrep);
- error = EPROTONOSUPPORT;
-nfsmout:
- mbuf_freem(rep->r_mreq);
- FSDBG_BOT(531, error, rep->r_xid, nmp, rep);
- return (error);
+ lck_mtx_unlock(&nmp->nm_lock);
+ if (wake)
+ wakeup(statep);
}
-#ifndef NFS_NOSERVER
-/*
- * Generate the rpc reply header
- * siz arg. is used to decide if adding a cluster is worthwhile
- */
int
-nfs_rephead(siz, nd, slp, err, mrq, mbp, bposp)
- int siz;
- struct nfsrv_descript *nd;
- struct nfssvc_sock *slp;
- int err;
- mbuf_t *mrq;
- mbuf_t *mbp;
- caddr_t *bposp;
+nfs_aux_request(
+ struct nfsmount *nmp,
+ thread_t thd,
+ struct sockaddr *saddr,
+ socket_t so,
+ int sotype,
+ mbuf_t mreq,
+ uint32_t xid,
+ int bindresv,
+ int timeo,
+ struct nfsm_chain *nmrep)
{
- u_long *tl;
- mbuf_t mreq;
- caddr_t bpos;
- mbuf_t mb, mb2;
- int error, mlen;
+ int error = 0, on = 1, try, sendat = 2, soproto, recv, optlen, restoreto = 0;
+ socket_t newso = NULL;
+ struct sockaddr_storage ss;
+ struct timeval orig_rcvto, orig_sndto, tv = { 1, 0 };
+ mbuf_t m, mrep = NULL;
+ struct msghdr msg;
+ uint32_t rxid = 0, reply = 0, reply_status, rejected_status;
+ uint32_t verf_type, verf_len, accepted_status;
+ size_t readlen, sentlen;
+ struct nfs_rpc_record_state nrrs;
+
+ if (!so) {
+ /* create socket and set options */
+ soproto = (sotype == SOCK_DGRAM) ? IPPROTO_UDP : IPPROTO_TCP;
+ if ((error = sock_socket(saddr->sa_family, sotype, soproto, NULL, NULL, &newso)))
+ goto nfsmout;
- /*
- * If this is a big reply, use a cluster else
- * try and leave leading space for the lower level headers.
- */
- siz += RPC_REPLYSIZ;
- if (siz >= nfs_mbuf_minclsize) {
- error = mbuf_getpacket(MBUF_WAITOK, &mreq);
- } else {
- error = mbuf_gethdr(MBUF_WAITOK, MBUF_TYPE_DATA, &mreq);
- }
- if (error) {
- /* unable to allocate packet */
- /* XXX nfsstat? */
- return (error);
- }
- mb = mreq;
- tl = mbuf_data(mreq);
- mlen = 6 * NFSX_UNSIGNED;
- if (siz < nfs_mbuf_minclsize) {
- /* leave space for lower level headers */
- tl += 80/sizeof(*tl); /* XXX max_hdr? XXX */
- mbuf_setdata(mreq, tl, mlen);
- } else {
- mbuf_setlen(mreq, mlen);
- }
- bpos = ((caddr_t)tl) + mlen;
- *tl++ = txdr_unsigned(nd->nd_retxid);
- *tl++ = rpc_reply;
- if (err == ERPCMISMATCH || (err & NFSERR_AUTHERR)) {
- *tl++ = rpc_msgdenied;
- if (err & NFSERR_AUTHERR) {
- *tl++ = rpc_autherr;
- *tl = txdr_unsigned(err & ~NFSERR_AUTHERR);
- mlen -= NFSX_UNSIGNED;
- mbuf_setlen(mreq, mlen);
- bpos -= NFSX_UNSIGNED;
- } else {
- *tl++ = rpc_mismatch;
- *tl++ = txdr_unsigned(RPC_VER2);
- *tl = txdr_unsigned(RPC_VER2);
+ if (bindresv) {
+ int level = (saddr->sa_family == AF_INET) ? IPPROTO_IP : IPPROTO_IPV6;
+ int optname = (saddr->sa_family == AF_INET) ? IP_PORTRANGE : IPV6_PORTRANGE;
+ int portrange = IP_PORTRANGE_LOW;
+ error = sock_setsockopt(newso, level, optname, &portrange, sizeof(portrange));
+ nfsmout_if(error);
+ ss.ss_len = saddr->sa_len;
+ ss.ss_family = saddr->sa_family;
+ if (ss.ss_family == AF_INET) {
+ ((struct sockaddr_in*)&ss)->sin_addr.s_addr = INADDR_ANY;
+ ((struct sockaddr_in*)&ss)->sin_port = htons(0);
+ } else if (ss.ss_family == AF_INET6) {
+ ((struct sockaddr_in6*)&ss)->sin6_addr = in6addr_any;
+ ((struct sockaddr_in6*)&ss)->sin6_port = htons(0);
+ } else {
+ error = EINVAL;
+ }
+ if (!error)
+ error = sock_bind(newso, (struct sockaddr *)&ss);
+ nfsmout_if(error);
}
- } else {
- *tl++ = rpc_msgaccepted;
- /*
- * For Kerberos authentication, we must send the nickname
- * verifier back, otherwise just RPCAUTH_NULL.
- */
- if (nd->nd_flag & ND_KERBFULL) {
- struct nfsuid *nuidp;
- struct timeval ktvin, ktvout;
- uid_t uid = kauth_cred_getuid(nd->nd_cr);
-
- lck_rw_lock_shared(&slp->ns_rwlock);
- for (nuidp = NUIDHASH(slp, uid)->lh_first;
- nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
- if (kauth_cred_getuid(nuidp->nu_cr) == uid &&
- (!nd->nd_nam2 || netaddr_match(NU_NETFAM(nuidp),
- &nuidp->nu_haddr, nd->nd_nam2)))
- break;
- }
- if (nuidp) {
- ktvin.tv_sec =
- txdr_unsigned(nuidp->nu_timestamp.tv_sec - 1);
- ktvin.tv_usec =
- txdr_unsigned(nuidp->nu_timestamp.tv_usec);
+ if (sotype == SOCK_STREAM) {
+# define NFS_AUX_CONNECTION_TIMEOUT 4 /* 4 second timeout for connections */
+ int count = 0;
+
+ error = sock_connect(newso, saddr, MSG_DONTWAIT);
+ if (error == EINPROGRESS)
+ error = 0;
+ nfsmout_if(error);
- /*
- * Encrypt the timestamp in ecb mode using the
- * session key.
- */
-#if NFSKERB
- XXX
-#endif
+ while ((error = sock_connectwait(newso, &tv)) == EINPROGRESS) {
+ /* After NFS_AUX_CONNECTION_TIMEOUT bail */
+ if (++count >= NFS_AUX_CONNECTION_TIMEOUT) {
+ error = ETIMEDOUT;
+ break;
+ }
+ }
+ nfsmout_if(error);
+ }
+ if (((error = sock_setsockopt(newso, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)))) ||
+ ((error = sock_setsockopt(newso, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv)))) ||
+ ((error = sock_setsockopt(newso, SOL_SOCKET, SO_NOADDRERR, &on, sizeof(on)))))
+ goto nfsmout;
+ so = newso;
+ } else {
+ /* make sure socket is using a one second timeout in this function */
+ optlen = sizeof(orig_rcvto);
+ error = sock_getsockopt(so, SOL_SOCKET, SO_RCVTIMEO, &orig_rcvto, &optlen);
+ if (!error) {
+ optlen = sizeof(orig_sndto);
+ error = sock_getsockopt(so, SOL_SOCKET, SO_SNDTIMEO, &orig_sndto, &optlen);
+ }
+ if (!error) {
+ sock_setsockopt(so, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
+ sock_setsockopt(so, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv));
+ restoreto = 1;
+ }
+ }
+
+ if (sotype == SOCK_STREAM) {
+ sendat = 0; /* we only resend the request for UDP */
+ nfs_rpc_record_state_init(&nrrs);
+ }
- *tl++ = rpc_auth_kerb;
- *tl++ = txdr_unsigned(3 * NFSX_UNSIGNED);
- *tl = ktvout.tv_sec;
- nfsm_build(tl, u_long *, 3 * NFSX_UNSIGNED);
- *tl++ = ktvout.tv_usec;
- *tl++ = txdr_unsigned(kauth_cred_getuid(nuidp->nu_cr));
- } else {
- *tl++ = 0;
- *tl++ = 0;
- }
- lck_rw_done(&slp->ns_rwlock);
+ for (try=0; try < timeo; try++) {
+ if ((error = nfs_sigintr(nmp, NULL, !try ? NULL : thd, 0)))
+ break;
+ if (!try || (try == sendat)) {
+ /* send the request (resending periodically for UDP) */
+ if ((error = mbuf_copym(mreq, 0, MBUF_COPYALL, MBUF_WAITOK, &m)))
+ goto nfsmout;
+ bzero(&msg, sizeof(msg));
+ if ((sotype == SOCK_DGRAM) && !sock_isconnected(so)) {
+ msg.msg_name = saddr;
+ msg.msg_namelen = saddr->sa_len;
+ }
+ if ((error = sock_sendmbuf(so, &msg, m, 0, &sentlen)))
+ goto nfsmout;
+ sendat *= 2;
+ if (sendat > 30)
+ sendat = 30;
+ }
+ /* wait for the response */
+ if (sotype == SOCK_STREAM) {
+ /* try to read (more of) record */
+ error = nfs_rpc_record_read(so, &nrrs, 0, &recv, &mrep);
+ /* if we don't have the whole record yet, we'll keep trying */
} else {
- *tl++ = 0;
- *tl++ = 0;
+ readlen = 1<<18;
+ bzero(&msg, sizeof(msg));
+ error = sock_receivembuf(so, &msg, &mrep, 0, &readlen);
}
- switch (err) {
- case EPROGUNAVAIL:
- *tl = txdr_unsigned(RPC_PROGUNAVAIL);
+ if (error == EWOULDBLOCK)
+ continue;
+ nfsmout_if(error);
+ /* parse the response */
+ nfsm_chain_dissect_init(error, nmrep, mrep);
+ nfsm_chain_get_32(error, nmrep, rxid);
+ nfsm_chain_get_32(error, nmrep, reply);
+ nfsmout_if(error);
+ if ((rxid != xid) || (reply != RPC_REPLY))
+ error = EBADRPC;
+ nfsm_chain_get_32(error, nmrep, reply_status);
+ nfsmout_if(error);
+ if (reply_status == RPC_MSGDENIED) {
+ nfsm_chain_get_32(error, nmrep, rejected_status);
+ nfsmout_if(error);
+ error = (rejected_status == RPC_MISMATCH) ? ERPCMISMATCH : EACCES;
+ goto nfsmout;
+ }
+ nfsm_chain_get_32(error, nmrep, verf_type); /* verifier flavor */
+ nfsm_chain_get_32(error, nmrep, verf_len); /* verifier length */
+ nfsmout_if(error);
+ if (verf_len)
+ nfsm_chain_adv(error, nmrep, nfsm_rndup(verf_len));
+ nfsm_chain_get_32(error, nmrep, accepted_status);
+ nfsmout_if(error);
+ switch (accepted_status) {
+ case RPC_SUCCESS:
+ error = 0;
break;
- case EPROGMISMATCH:
- *tl = txdr_unsigned(RPC_PROGMISMATCH);
- nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED);
- // XXX hard coded versions
- *tl++ = txdr_unsigned(2);
- *tl = txdr_unsigned(3);
+ case RPC_PROGUNAVAIL:
+ error = EPROGUNAVAIL;
break;
- case EPROCUNAVAIL:
- *tl = txdr_unsigned(RPC_PROCUNAVAIL);
+ case RPC_PROGMISMATCH:
+ error = EPROGMISMATCH;
break;
- case EBADRPC:
- *tl = txdr_unsigned(RPC_GARBAGE);
+ case RPC_PROCUNAVAIL:
+ error = EPROCUNAVAIL;
break;
+ case RPC_GARBAGE:
+ error = EBADRPC;
+ break;
+ case RPC_SYSTEM_ERR:
default:
- *tl = 0;
- if (err != NFSERR_RETVOID) {
- nfsm_build(tl, u_long *, NFSX_UNSIGNED);
- if (err)
- *tl = txdr_unsigned(nfsrv_errmap(nd, err));
- else
- *tl = 0;
- }
+ error = EIO;
break;
}
+ break;
}
-
- if (mrq != NULL)
- *mrq = mreq;
- *mbp = mb;
- *bposp = bpos;
- if (err != 0 && err != NFSERR_RETVOID) {
- OSAddAtomic(1, (SInt32*)&nfsstats.srvrpc_errs);
+nfsmout:
+ if (restoreto) {
+ sock_setsockopt(so, SOL_SOCKET, SO_RCVTIMEO, &orig_rcvto, sizeof(tv));
+ sock_setsockopt(so, SOL_SOCKET, SO_SNDTIMEO, &orig_sndto, sizeof(tv));
}
- return (0);
+ if (newso) {
+ sock_shutdown(newso, SHUT_RDWR);
+ sock_close(newso);
+ }
+ mbuf_freem(mreq);
+ return (error);
}
-
-#endif /* NFS_NOSERVER */
-
-
-/*
- * From FreeBSD 1.58, a Matt Dillon fix...
- * Flag a request as being about to terminate.
- * The nm_sent count is decremented now to avoid deadlocks when the process
- * in soreceive() hasn't yet managed to send its own request.
- */
-static void
-nfs_softterm(struct nfsreq *rep)
+int
+nfs_portmap_lookup(
+ struct nfsmount *nmp,
+ vfs_context_t ctx,
+ struct sockaddr *sa,
+ socket_t so,
+ uint32_t protocol,
+ uint32_t vers,
+ uint32_t ipproto,
+ int timeo)
{
+ thread_t thd = vfs_context_thread(ctx);
+ kauth_cred_t cred = vfs_context_ucred(ctx);
+ struct sockaddr_storage ss;
+ struct sockaddr *saddr = (struct sockaddr*)&ss;
+ struct nfsm_chain nmreq, nmrep;
+ mbuf_t mreq;
+ int error = 0, ip, pmprog, pmvers, pmproc, ualen = 0;
+ uint32_t port;
+ uint64_t xid = 0;
+ char uaddr[MAX_IPv6_STR_LEN+16];
+
+ bcopy(sa, saddr, min(sizeof(ss), sa->sa_len));
+ if (saddr->sa_family == AF_INET) {
+ ip = 4;
+ pmprog = PMAPPROG;
+ pmvers = PMAPVERS;
+ pmproc = PMAPPROC_GETPORT;
+ } else if (saddr->sa_family == AF_INET6) {
+ ip = 6;
+ pmprog = RPCBPROG;
+ pmvers = RPCBVERS4;
+ pmproc = RPCBPROC_GETVERSADDR;
+ } else {
+ return (EINVAL);
+ }
+ nfsm_chain_null(&nmreq);
+ nfsm_chain_null(&nmrep);
- rep->r_flags |= R_SOFTTERM;
- if (rep->r_flags & R_SENT) {
- FSDBG(532, rep->r_xid, rep, rep->r_nmp->nm_sent,
- rep->r_nmp->nm_cwnd);
- rep->r_nmp->nm_sent -= NFS_CWNDSCALE;
- rep->r_flags &= ~R_SENT;
+tryagain:
+ /* send portmapper request to get port/uaddr */
+ if (ip == 4)
+ ((struct sockaddr_in*)saddr)->sin_port = htons(PMAPPORT);
+ else
+ ((struct sockaddr_in6*)saddr)->sin6_port = htons(PMAPPORT);
+ nfsm_chain_build_alloc_init(error, &nmreq, 8*NFSX_UNSIGNED);
+ nfsm_chain_add_32(error, &nmreq, protocol);
+ nfsm_chain_add_32(error, &nmreq, vers);
+ if (ip == 4) {
+ nfsm_chain_add_32(error, &nmreq, ipproto);
+ nfsm_chain_add_32(error, &nmreq, 0);
+ } else {
+ if (ipproto == IPPROTO_TCP)
+ nfsm_chain_add_string(error, &nmreq, "tcp6", 4);
+ else
+ nfsm_chain_add_string(error, &nmreq, "udp6", 4);
+ nfsm_chain_add_string(error, &nmreq, "", 0); /* uaddr */
+ nfsm_chain_add_string(error, &nmreq, "", 0); /* owner */
+ }
+ nfsm_chain_build_done(error, &nmreq);
+ nfsmout_if(error);
+ error = nfsm_rpchead2(nmp, (ipproto == IPPROTO_UDP) ? SOCK_DGRAM : SOCK_STREAM,
+ pmprog, pmvers, pmproc, RPCAUTH_SYS, cred, NULL, nmreq.nmc_mhead,
+ &xid, &mreq);
+ nfsmout_if(error);
+ nmreq.nmc_mhead = NULL;
+ error = nfs_aux_request(nmp, thd, saddr, so, (ipproto == IPPROTO_UDP) ? SOCK_DGRAM : SOCK_STREAM,
+ mreq, R_XID32(xid), 0, timeo, &nmrep);
+
+ /* grab port from portmap response */
+ if (ip == 4) {
+ nfsm_chain_get_32(error, &nmrep, port);
+ if (!error)
+ ((struct sockaddr_in*)sa)->sin_port = htons(port);
+ } else {
+ /* get uaddr string and convert to sockaddr */
+ nfsm_chain_get_32(error, &nmrep, ualen);
+ if (!error) {
+ if (ualen > ((int)sizeof(uaddr)-1))
+ error = EIO;
+ if (ualen < 1) {
+ /* program is not available, just return a zero port */
+ bcopy(sa, saddr, min(sizeof(ss), sa->sa_len));
+ ((struct sockaddr_in6*)saddr)->sin6_port = htons(0);
+ } else {
+ nfsm_chain_get_opaque(error, &nmrep, ualen, uaddr);
+ if (!error) {
+ uaddr[ualen] = '\0';
+ if (!nfs_uaddr2sockaddr(uaddr, saddr))
+ error = EIO;
+ }
+ }
+ }
+ if ((error == EPROGMISMATCH) || (error == EPROCUNAVAIL) || (error == EIO) || (error == EBADRPC)) {
+ /* remote doesn't support rpcbind version or proc (or we couldn't parse uaddr) */
+ if (pmvers == RPCBVERS4) {
+ /* fall back to v3 and GETADDR */
+ pmvers = RPCBVERS3;
+ pmproc = RPCBPROC_GETADDR;
+ nfsm_chain_cleanup(&nmreq);
+ nfsm_chain_cleanup(&nmrep);
+ bcopy(sa, saddr, min(sizeof(ss), sa->sa_len));
+ xid = 0;
+ error = 0;
+ goto tryagain;
+ }
+ }
+ if (!error)
+ bcopy(saddr, sa, min(saddr->sa_len, sa->sa_len));
}
+nfsmout:
+ nfsm_chain_cleanup(&nmreq);
+ nfsm_chain_cleanup(&nmrep);
+ return (error);
}
-void
-nfs_timer_funnel(void * arg)
+int
+nfs_msg(thread_t thd,
+ const char *server,
+ const char *msg,
+ int error)
{
- (void) thread_funnel_set(kernel_flock, TRUE);
- nfs_timer(arg);
- (void) thread_funnel_set(kernel_flock, FALSE);
+ proc_t p = thd ? get_bsdthreadtask_info(thd) : NULL;
+ tpr_t tpr;
+ if (p)
+ tpr = tprintf_open(p);
+ else
+ tpr = NULL;
+ if (error)
+ tprintf(tpr, "nfs server %s: %s, error %d\n", server, msg, error);
+ else
+ tprintf(tpr, "nfs server %s: %s\n", server, msg);
+ tprintf_close(tpr);
+ return (0);
}
-/*
- * Ensure rep isn't in use by the timer, then dequeue it.
- */
-static void
-nfs_repdequeue(struct nfsreq *rep)
-{
+#define NFS_SQUISH_MOBILE_ONLY 0x0001 /* Squish mounts only on mobile machines */
+#define NFS_SQUISH_AUTOMOUNTED_ONLY 0x0002 /* Squish mounts only if the are automounted */
+#define NFS_SQUISH_SOFT 0x0004 /* Treat all soft mounts as though they were on a mobile machine */
+#define NFS_SQUISH_QUICK 0x0008 /* Try to squish mounts more quickly. */
+#define NFS_SQUISH_SHUTDOWN 0x1000 /* Squish all mounts on shutdown. Currently not implemented */
- while ((rep->r_flags & R_BUSY)) {
- rep->r_flags |= R_WAITING;
- tsleep(rep, PSOCK, "repdeq", 0);
- }
- TAILQ_REMOVE(&nfs_reqq, rep, r_chain);
-}
+uint32_t nfs_squishy_flags = NFS_SQUISH_MOBILE_ONLY | NFS_SQUISH_AUTOMOUNTED_ONLY | NFS_SQUISH_QUICK;
+int32_t nfs_is_mobile;
+
+#define NFS_SQUISHY_DEADTIMEOUT 8 /* Dead time out for squishy mounts */
+#define NFS_SQUISHY_QUICKTIMEOUT 4 /* Quicker dead time out when nfs_squish_flags NFS_SQUISH_QUICK bit is set*/
/*
- * Busy (lock) a nfsreq, used by the nfs timer to make sure it's not
- * free()'d out from under it.
+ * Could this mount be squished?
*/
-static void
-nfs_repbusy(struct nfsreq *rep)
+int
+nfs_can_squish(struct nfsmount *nmp)
{
+ uint64_t flags = vfs_flags(nmp->nm_mountp);
+ int softsquish = ((nfs_squishy_flags & NFS_SQUISH_SOFT) & NMFLAG(nmp, SOFT));
- if ((rep->r_flags & R_BUSY))
- panic("rep locked");
- rep->r_flags |= R_BUSY;
-}
+ if (!softsquish && (nfs_squishy_flags & NFS_SQUISH_MOBILE_ONLY) && nfs_is_mobile == 0)
+ return (0);
-/*
- * Unbusy the nfsreq passed in, return the next nfsreq in the chain busied.
- */
-static struct nfsreq *
-nfs_repnext(struct nfsreq *rep)
-{
- struct nfsreq * nextrep;
+ if ((nfs_squishy_flags & NFS_SQUISH_AUTOMOUNTED_ONLY) && (flags & MNT_AUTOMOUNTED) == 0)
+ return (0);
- if (rep == NULL)
- return (NULL);
- /*
- * We need to get and busy the next req before signalling the
- * current one, otherwise wakeup() may block us and we'll race to
- * grab the next req.
- */
- nextrep = TAILQ_NEXT(rep, r_chain);
- if (nextrep != NULL)
- nfs_repbusy(nextrep);
- /* unbusy and signal. */
- rep->r_flags &= ~R_BUSY;
- if ((rep->r_flags & R_WAITING)) {
- rep->r_flags &= ~R_WAITING;
- wakeup(rep);
- }
- return (nextrep);
+ return (1);
}
/*
- * Nfs timer routine
- * Scan the nfsreq list and retranmit any requests that have timed out
- * To avoid retransmission attempts on STREAM sockets (in the future) make
- * sure to set the r_retry field to 0 (implies nm_retry == 0).
+ * NFS mounts default to "rw,hard" - but frequently on mobile clients
+ * the mount may become "not responding". It's desirable to be able
+ * to unmount these dead mounts, but only if there is no risk of
+ * losing data or crashing applications. A "squishy" NFS mount is one
+ * that can be force unmounted with little risk of harm.
+ *
+ * nfs_is_squishy checks if a mount is in a squishy state. A mount is
+ * in a squishy state iff it is allowed to be squishy and there are no
+ * dirty pages and there are no mmapped files and there are no files
+ * open for write. Mounts are allowed to be squishy is controlled by
+ * the settings of the nfs_squishy_flags and its mobility state. These
+ * flags can be set by sysctls.
+ *
+ * If nfs_is_squishy determines that we are in a squishy state we will
+ * update the current dead timeout to at least NFS_SQUISHY_DEADTIMEOUT
+ * (or NFS_SQUISHY_QUICKTIMEOUT if NFS_SQUISH_QUICK is set) (see
+ * above) or 1/8th of the mount's nm_deadtimeout value, otherwise we just
+ * update the current dead timeout with the mount's nm_deadtimeout
+ * value set at mount time.
+ *
+ * Assumes that nm_lock is held.
+ *
+ * Note this routine is racey, but its effects on setting the
+ * dead timeout only have effects when we're in trouble and are likely
+ * to stay that way. Since by default its only for automounted
+ * volumes on mobile machines; this is a reasonable trade off between
+ * data integrity and user experience. It can be disabled or set via
+ * nfs.conf file.
*/
-void
-nfs_timer(__unused void *arg)
-{
- struct nfsreq *rep;
- mbuf_t m;
- socket_t so;
- struct nfsmount *nmp;
- int timeo;
- int error;
-#ifndef NFS_NOSERVER
- struct nfssvc_sock *slp;
- u_quad_t cur_usec;
-#endif /* NFS_NOSERVER */
- int flags, rexmit, cwnd, sent;
- u_long xid;
- struct timeval now;
-
- rep = TAILQ_FIRST(&nfs_reqq);
- if (rep != NULL)
- nfs_repbusy(rep);
- microuptime(&now);
- for ( ; rep != NULL ; rep = nfs_repnext(rep)) {
- nmp = rep->r_nmp;
- if (!nmp) /* unmounted */
- continue;
- if (rep->r_mrep || (rep->r_flags & R_SOFTTERM))
- continue;
- if (nfs_sigintr(nmp, rep, rep->r_procp))
- continue;
- if (nmp->nm_tprintf_initial_delay != 0 &&
- (rep->r_rexmit > 2 || (rep->r_flags & R_RESENDERR)) &&
- rep->r_lastmsg + nmp->nm_tprintf_delay < now.tv_sec) {
- rep->r_lastmsg = now.tv_sec;
- nfs_down(rep->r_nmp, rep->r_procp, 0, NFSSTA_TIMEO,
- "not responding");
- rep->r_flags |= R_TPRINTFMSG;
- if (!(nmp->nm_state & NFSSTA_MOUNTED)) {
- /* we're not yet completely mounted and */
- /* we can't complete an RPC, so we fail */
- OSAddAtomic(1, (SInt32*)&nfsstats.rpctimeouts);
- nfs_softterm(rep);
- continue;
- }
- }
- if (rep->r_rtt >= 0) {
- rep->r_rtt++;
- if (nmp->nm_flag & NFSMNT_DUMBTIMR)
- timeo = nmp->nm_timeo;
- else
- timeo = NFS_RTO(nmp, proct[rep->r_procnum]);
- /* ensure 62.5 ms floor */
- while (16 * timeo < hz)
- timeo *= 2;
- if (nmp->nm_timeouts > 0)
- timeo *= nfs_backoff[nmp->nm_timeouts - 1];
- if (rep->r_rtt <= timeo)
- continue;
- if (nmp->nm_timeouts < 8)
- nmp->nm_timeouts++;
- }
- /*
- * Check for too many retransmits. This is never true for
- * 'hard' mounts because we set r_retry to NFS_MAXREXMIT + 1
- * and never allow r_rexmit to be more than NFS_MAXREXMIT.
- */
- if (rep->r_rexmit >= rep->r_retry) { /* too many */
- OSAddAtomic(1, (SInt32*)&nfsstats.rpctimeouts);
- nfs_softterm(rep);
- continue;
- }
- if (nmp->nm_sotype != SOCK_DGRAM) {
- if (++rep->r_rexmit > NFS_MAXREXMIT)
- rep->r_rexmit = NFS_MAXREXMIT;
- continue;
- }
- if ((so = nmp->nm_so) == NULL)
- continue;
- /*
- * If there is enough space and the window allows..
- * Resend it
- * Set r_rtt to -1 in case we fail to send it now.
- */
- rep->r_rtt = -1;
- if (((nmp->nm_flag & NFSMNT_DUMBTIMR) ||
- (rep->r_flags & R_SENT) ||
- nmp->nm_sent < nmp->nm_cwnd) &&
- (mbuf_copym(rep->r_mreq, 0, MBUF_COPYALL, MBUF_DONTWAIT, &m) == 0)){
- struct msghdr msg;
- /*
- * Iff first send, start timing
- * else turn timing off, backoff timer
- * and divide congestion window by 2.
- * We update these *before* the send to avoid
- * racing against receiving the reply.
- * We save them so we can restore them on send error.
- */
- flags = rep->r_flags;
- rexmit = rep->r_rexmit;
- cwnd = nmp->nm_cwnd;
- sent = nmp->nm_sent;
- xid = rep->r_xid;
- if (rep->r_flags & R_SENT) {
- rep->r_flags &= ~R_TIMING;
- if (++rep->r_rexmit > NFS_MAXREXMIT)
- rep->r_rexmit = NFS_MAXREXMIT;
- nmp->nm_cwnd >>= 1;
- if (nmp->nm_cwnd < NFS_CWNDSCALE)
- nmp->nm_cwnd = NFS_CWNDSCALE;
- OSAddAtomic(1, (SInt32*)&nfsstats.rpcretries);
- } else {
- rep->r_flags |= R_SENT;
- nmp->nm_sent += NFS_CWNDSCALE;
- }
- FSDBG(535, xid, rep, nmp->nm_sent, nmp->nm_cwnd);
+int
+nfs_is_squishy(struct nfsmount *nmp)
+{
+ mount_t mp = nmp->nm_mountp;
+ int squishy = 0;
+ int timeo = (nfs_squishy_flags & NFS_SQUISH_QUICK) ? NFS_SQUISHY_QUICKTIMEOUT : NFS_SQUISHY_DEADTIMEOUT;
- bzero(&msg, sizeof(msg));
- if ((nmp->nm_flag & NFSMNT_NOCONN) == NFSMNT_NOCONN) {
- msg.msg_name = mbuf_data(nmp->nm_nam);
- msg.msg_namelen = mbuf_len(nmp->nm_nam);
- }
- error = sock_sendmbuf(so, &msg, m, MSG_DONTWAIT, NULL);
+ NFS_SOCK_DBG("%s: nm_curdeadtimeout = %d, nfs_is_mobile = %d\n",
+ vfs_statfs(mp)->f_mntfromname, nmp->nm_curdeadtimeout, nfs_is_mobile);
- FSDBG(535, xid, error, sent, cwnd);
+ if (!nfs_can_squish(nmp))
+ goto out;
- if (error) {
- if (error == EWOULDBLOCK) {
- rep->r_flags = flags;
- rep->r_rexmit = rexmit;
- nmp->nm_cwnd = cwnd;
- nmp->nm_sent = sent;
- rep->r_xid = xid;
- }
- else {
- if (NFSIGNORE_SOERROR(nmp->nm_sotype, error)) {
- int clearerror;
- int optlen = sizeof(clearerror);
- sock_getsockopt(nmp->nm_so, SOL_SOCKET, SO_ERROR, &clearerror, &optlen);
- }
- rep->r_flags = flags | R_RESENDERR;
- rep->r_rexmit = rexmit;
- nmp->nm_cwnd = cwnd;
- nmp->nm_sent = sent;
- if (flags & R_SENT)
- OSAddAtomic(-1, (SInt32*)&nfsstats.rpcretries);
- }
- } else
- rep->r_rtt = 0;
- }
- }
- microuptime(&now);
-#ifndef NFS_NOSERVER
- /*
- * Scan the write gathering queues for writes that need to be
- * completed now.
- */
- cur_usec = (u_quad_t)now.tv_sec * 1000000 + (u_quad_t)now.tv_usec;
- lck_mtx_lock(nfsd_mutex);
- TAILQ_FOREACH(slp, &nfssvc_sockhead, ns_chain) {
- if (slp->ns_wgtime && (slp->ns_wgtime <= cur_usec))
- nfsrv_wakenfsd(slp);
- }
- while ((slp = TAILQ_FIRST(&nfssvc_deadsockhead))) {
- if ((slp->ns_timestamp + 5) > now.tv_sec)
- break;
- TAILQ_REMOVE(&nfssvc_deadsockhead, slp, ns_chain);
- nfsrv_slpfree(slp);
- }
- lck_mtx_unlock(nfsd_mutex);
-#endif /* NFS_NOSERVER */
+ timeo = (nmp->nm_deadtimeout > timeo) ? max(nmp->nm_deadtimeout/8, timeo) : timeo;
+ NFS_SOCK_DBG("nm_writers = %d nm_mappers = %d timeo = %d\n", nmp->nm_writers, nmp->nm_mappers, timeo);
- if (nfsbuffreeuptimestamp + 30 <= now.tv_sec) {
- /*
- * We haven't called nfs_buf_freeup() in a little while.
- * So, see if we can free up any stale/unused bufs now.
+ if (nmp->nm_writers == 0 && nmp->nm_mappers == 0) {
+ uint64_t flags = mp ? vfs_flags(mp) : 0;
+ squishy = 1;
+
+ /*
+ * Walk the nfs nodes and check for dirty buffers it we're not
+ * RDONLY and we've not already been declared as squishy since
+ * this can be a bit expensive.
*/
- nfs_buf_freeup(1);
+ if (!(flags & MNT_RDONLY) && !(nmp->nm_state & NFSSTA_SQUISHY))
+ squishy = !nfs_mount_is_dirty(mp);
}
- timeout(nfs_timer_funnel, (void *)0, nfs_ticks);
+out:
+ if (squishy)
+ nmp->nm_state |= NFSSTA_SQUISHY;
+ else
+ nmp->nm_state &= ~NFSSTA_SQUISHY;
+
+ nmp->nm_curdeadtimeout = squishy ? timeo : nmp->nm_deadtimeout;
+
+ NFS_SOCK_DBG("nm_curdeadtimeout = %d\n", nmp->nm_curdeadtimeout);
+ return (squishy);
}
-
/*
- * Test for a termination condition pending on the process.
- * This is used to determine if we need to bail on a mount.
- * EIO is returned if there has been a soft timeout.
- * EINTR is returned if there is a signal pending that is not being ignored
- * and the mount is interruptable, or if we are a thread that is in the process
- * of cancellation (also SIGKILL posted).
+ * On a send operation, if we can't reach the server and we've got only one server to talk to
+ * and NFS_SQUISH_QUICK flag is set and we are in a squishy state then mark the mount as dead
+ * and ask to be forcibly unmounted. Return 1 if we're dead and 0 otherwise.
*/
int
-nfs_sigintr(nmp, rep, p)
- struct nfsmount *nmp;
- struct nfsreq *rep;
- proc_t p;
+nfs_is_dead(int error, struct nfsmount *nmp)
{
- sigset_t pending_sigs;
- int context_good = 0;
- struct nfsmount *repnmp;
- extern proc_t kernproc;
+ fsid_t fsid;
- if (nmp == NULL)
- return (ENXIO);
- if (rep != NULL) {
- repnmp = rep->r_nmp;
- /* we've had a forced unmount. */
- if (repnmp == NULL)
- return (ENXIO);
- /* request has timed out on a 'soft' mount. */
- if (rep->r_flags & R_SOFTTERM)
- return (EIO);
- /*
- * We're in the progress of a force unmount and there's
- * been a timeout we're dead and fail IO.
- */
- if ((repnmp->nm_state & (NFSSTA_FORCE|NFSSTA_TIMEO)) ==
- (NFSSTA_FORCE|NFSSTA_TIMEO))
- return (EIO);
- /* Someone is unmounting us, go soft and mark it. */
- if (repnmp->nm_mountp->mnt_kern_flag & MNTK_FRCUNMOUNT) {
- repnmp->nm_flag |= NFSMNT_SOFT;
- nmp->nm_state |= NFSSTA_FORCE;
- }
- /*
- * If the mount is hung and we've requested not to hang
- * on remote filesystems, then bail now.
- */
- if (p != NULL && (proc_noremotehang(p)) != 0 &&
- (repnmp->nm_state & NFSSTA_TIMEO) != 0)
- return (EIO);
+ lck_mtx_lock(&nmp->nm_lock);
+ if (nmp->nm_state & NFSSTA_DEAD) {
+ lck_mtx_unlock(&nmp->nm_lock);
+ return (1);
}
- /* XXX: is this valid? this probably should be an assertion. */
- if (p == NULL)
- return (0);
- /* Is this thread belongs to kernel task; then abort check is not needed */
- if ((current_proc() != kernproc) && current_thread_aborted()) {
- return (EINTR);
+ if ((error != ENETUNREACH && error != EHOSTUNREACH && error != EADDRNOTAVAIL) ||
+ !(nmp->nm_locations.nl_numlocs == 1 && nmp->nm_locations.nl_locations[0]->nl_servcount == 1)) {
+ lck_mtx_unlock(&nmp->nm_lock);
+ return (0);
}
- /* mask off thread and process blocked signals. */
- pending_sigs = proc_pendingsignals(p, NFSINT_SIGMASK);
- if (pending_sigs && (nmp->nm_flag & NFSMNT_INT) != 0)
- return (EINTR);
+ if ((nfs_squishy_flags & NFS_SQUISH_QUICK) && nfs_is_squishy(nmp)) {
+ printf("nfs_is_dead: nfs server %s: unreachable. Squished dead\n", vfs_statfs(nmp->nm_mountp)->f_mntfromname);
+ fsid = vfs_statfs(nmp->nm_mountp)->f_fsid;
+ lck_mtx_unlock(&nmp->nm_lock);
+ nfs_mount_zombie(nmp, NFSSTA_DEAD);
+ vfs_event_signal(&fsid, VQ_DEAD, 0);
+ return (1);
+ }
+ lck_mtx_unlock(&nmp->nm_lock);
return (0);
}
/*
- * Lock a socket against others.
- * Necessary for STREAM sockets to ensure you get an entire rpc request/reply
- * and also to avoid race conditions between the processes with nfs requests
- * in progress when a reconnect is necessary.
- */
-int
-nfs_sndlock(rep)
- struct nfsreq *rep;
-{
- int *statep;
- proc_t p;
- int error, slpflag = 0, slptimeo = 0;
-
- if (rep->r_nmp == NULL)
- return (ENXIO);
- statep = &rep->r_nmp->nm_state;
-
- p = rep->r_procp;
- if (rep->r_nmp->nm_flag & NFSMNT_INT)
- slpflag = PCATCH;
- while (*statep & NFSSTA_SNDLOCK) {
- error = nfs_sigintr(rep->r_nmp, rep, p);
- if (error)
- return (error);
- *statep |= NFSSTA_WANTSND;
- if (p != NULL && (proc_noremotehang(p)) != 0)
- slptimeo = hz;
- tsleep((caddr_t)statep, slpflag | (PZERO - 1), "nfsndlck", slptimeo);
- if (slpflag == PCATCH) {
- slpflag = 0;
- slptimeo = 2 * hz;
- }
- /*
- * Make sure while we slept that the mountpoint didn't go away.
- * nfs_sigintr and callers expect it in tact.
- */
- if (!rep->r_nmp)
- return (ENXIO); /* don't have lock until out of loop */
- }
- *statep |= NFSSTA_SNDLOCK;
- return (0);
+ * If we've experienced timeouts and we're not really a
+ * classic hard mount, then just return cached data to
+ * the caller instead of likely hanging on an RPC.
+ */
+int
+nfs_use_cache(struct nfsmount *nmp)
+{
+ /*
+ *%%% We always let mobile users goto the cache,
+ * perhaps we should not even require them to have
+ * a timeout?
+ */
+ int cache_ok = (nfs_is_mobile || NMFLAG(nmp, SOFT) ||
+ nfs_can_squish(nmp) || nmp->nm_deadtimeout);
+
+ int timeoutmask = NFSSTA_TIMEO | NFSSTA_LOCKTIMEO | NFSSTA_JUKEBOXTIMEO;
+
+ /*
+ * So if we have a timeout and we're not really a hard hard-mount,
+ * return 1 to not get things out of the cache.
+ */
+
+ return ((nmp->nm_state & timeoutmask) && cache_ok);
}
/*
- * Unlock the stream socket for others.
+ * Log a message that nfs or lockd server is unresponsive. Check if we
+ * can be squished and if we can, or that our dead timeout has
+ * expired, and we're not holding state, set our mount as dead, remove
+ * our mount state and ask to be unmounted. If we are holding state
+ * we're being called from the nfs_request_timer and will soon detect
+ * that we need to unmount.
*/
void
-nfs_sndunlock(rep)
- struct nfsreq *rep;
+nfs_down(struct nfsmount *nmp, thread_t thd, int error, int flags, const char *msg, int holding_state)
{
- int *statep;
+ int timeoutmask, wasunresponsive, unresponsive, softnobrowse;
+ uint32_t do_vfs_signal = 0;
+ struct timeval now;
- if (rep->r_nmp == NULL)
+ if (nfs_mount_gone(nmp))
return;
- statep = &rep->r_nmp->nm_state;
- if ((*statep & NFSSTA_SNDLOCK) == 0)
- panic("nfs sndunlock");
- *statep &= ~NFSSTA_SNDLOCK;
- if (*statep & NFSSTA_WANTSND) {
- *statep &= ~NFSSTA_WANTSND;
- wakeup((caddr_t)statep);
+
+ lck_mtx_lock(&nmp->nm_lock);
+
+ timeoutmask = NFSSTA_TIMEO | NFSSTA_LOCKTIMEO | NFSSTA_JUKEBOXTIMEO;
+ if (NMFLAG(nmp, MUTEJUKEBOX)) /* jukebox timeouts don't count as unresponsive if muted */
+ timeoutmask &= ~NFSSTA_JUKEBOXTIMEO;
+ wasunresponsive = (nmp->nm_state & timeoutmask);
+
+ /* XXX don't allow users to know about/disconnect unresponsive, soft, nobrowse mounts */
+ softnobrowse = (NMFLAG(nmp, SOFT) && (vfs_flags(nmp->nm_mountp) & MNT_DONTBROWSE));
+
+ if ((flags & NFSSTA_TIMEO) && !(nmp->nm_state & NFSSTA_TIMEO))
+ nmp->nm_state |= NFSSTA_TIMEO;
+ if ((flags & NFSSTA_LOCKTIMEO) && !(nmp->nm_state & NFSSTA_LOCKTIMEO))
+ nmp->nm_state |= NFSSTA_LOCKTIMEO;
+ if ((flags & NFSSTA_JUKEBOXTIMEO) && !(nmp->nm_state & NFSSTA_JUKEBOXTIMEO))
+ nmp->nm_state |= NFSSTA_JUKEBOXTIMEO;
+
+ unresponsive = (nmp->nm_state & timeoutmask);
+
+ nfs_is_squishy(nmp);
+
+ if (unresponsive && (nmp->nm_curdeadtimeout > 0)) {
+ microuptime(&now);
+ if (!wasunresponsive) {
+ nmp->nm_deadto_start = now.tv_sec;
+ nfs_mount_sock_thread_wake(nmp);
+ } else if ((now.tv_sec - nmp->nm_deadto_start) > nmp->nm_curdeadtimeout && !holding_state) {
+ if (!(nmp->nm_state & NFSSTA_DEAD))
+ printf("nfs server %s: %sdead\n", vfs_statfs(nmp->nm_mountp)->f_mntfromname,
+ (nmp->nm_curdeadtimeout != nmp->nm_deadtimeout) ? "squished " : "");
+ do_vfs_signal = VQ_DEAD;
+ }
}
+ lck_mtx_unlock(&nmp->nm_lock);
+
+ if (do_vfs_signal == VQ_DEAD && !(nmp->nm_state & NFSSTA_DEAD))
+ nfs_mount_zombie(nmp, NFSSTA_DEAD);
+ else if (softnobrowse || wasunresponsive || !unresponsive)
+ do_vfs_signal = 0;
+ else
+ do_vfs_signal = VQ_NOTRESP;
+ if (do_vfs_signal)
+ vfs_event_signal(&vfs_statfs(nmp->nm_mountp)->f_fsid, do_vfs_signal, 0);
+
+ nfs_msg(thd, vfs_statfs(nmp->nm_mountp)->f_mntfromname, msg, error);
}
-static int
-nfs_rcvlock(struct nfsreq *rep)
+void
+nfs_up(struct nfsmount *nmp, thread_t thd, int flags, const char *msg)
{
- int *statep;
- int error, slpflag, slptimeo = 0;
+ int timeoutmask, wasunresponsive, unresponsive, softnobrowse;
+ int do_vfs_signal;
- /* make sure we still have our mountpoint */
- if (!rep->r_nmp) {
- if (rep->r_mrep != NULL)
- return (EALREADY);
- return (ENXIO);
- }
+ if (nfs_mount_gone(nmp))
+ return;
- statep = &rep->r_nmp->nm_state;
- FSDBG_TOP(534, rep->r_xid, rep, rep->r_nmp, *statep);
- if (rep->r_nmp->nm_flag & NFSMNT_INT)
- slpflag = PCATCH;
+ if (msg)
+ nfs_msg(thd, vfs_statfs(nmp->nm_mountp)->f_mntfromname, msg, 0);
+
+ lck_mtx_lock(&nmp->nm_lock);
+
+ timeoutmask = NFSSTA_TIMEO | NFSSTA_LOCKTIMEO | NFSSTA_JUKEBOXTIMEO;
+ if (NMFLAG(nmp, MUTEJUKEBOX)) /* jukebox timeouts don't count as unresponsive if muted */
+ timeoutmask &= ~NFSSTA_JUKEBOXTIMEO;
+ wasunresponsive = (nmp->nm_state & timeoutmask);
+
+ /* XXX don't allow users to know about/disconnect unresponsive, soft, nobrowse mounts */
+ softnobrowse = (NMFLAG(nmp, SOFT) && (vfs_flags(nmp->nm_mountp) & MNT_DONTBROWSE));
+
+ if ((flags & NFSSTA_TIMEO) && (nmp->nm_state & NFSSTA_TIMEO))
+ nmp->nm_state &= ~NFSSTA_TIMEO;
+ if ((flags & NFSSTA_LOCKTIMEO) && (nmp->nm_state & NFSSTA_LOCKTIMEO))
+ nmp->nm_state &= ~NFSSTA_LOCKTIMEO;
+ if ((flags & NFSSTA_JUKEBOXTIMEO) && (nmp->nm_state & NFSSTA_JUKEBOXTIMEO))
+ nmp->nm_state &= ~NFSSTA_JUKEBOXTIMEO;
+
+ unresponsive = (nmp->nm_state & timeoutmask);
+
+ nmp->nm_deadto_start = 0;
+ nmp->nm_curdeadtimeout = nmp->nm_deadtimeout;
+ nmp->nm_state &= ~NFSSTA_SQUISHY;
+ lck_mtx_unlock(&nmp->nm_lock);
+
+ if (softnobrowse)
+ do_vfs_signal = 0;
else
- slpflag = 0;
- while (*statep & NFSSTA_RCVLOCK) {
- if ((error = nfs_sigintr(rep->r_nmp, rep, rep->r_procp))) {
- FSDBG_BOT(534, rep->r_xid, rep, rep->r_nmp, 0x100);
- return (error);
- } else if (rep->r_mrep != NULL) {
- /*
- * Don't bother sleeping if reply already arrived
- */
- FSDBG_BOT(534, rep->r_xid, rep, rep->r_nmp, 0x101);
- return (EALREADY);
+ do_vfs_signal = (wasunresponsive && !unresponsive);
+ if (do_vfs_signal)
+ vfs_event_signal(&vfs_statfs(nmp->nm_mountp)->f_fsid, VQ_NOTRESP, 1);
+}
+
+
+#endif /* NFSCLIENT */
+
+#if NFSSERVER
+
+/*
+ * Generate the rpc reply header
+ * siz arg. is used to decide if adding a cluster is worthwhile
+ */
+int
+nfsrv_rephead(
+ struct nfsrv_descript *nd,
+ __unused struct nfsrv_sock *slp,
+ struct nfsm_chain *nmrepp,
+ size_t siz)
+{
+ mbuf_t mrep;
+ u_int32_t *tl;
+ struct nfsm_chain nmrep;
+ int err, error;
+
+ err = nd->nd_repstat;
+ if (err && (nd->nd_vers == NFS_VER2))
+ siz = 0;
+
+ /*
+ * If this is a big reply, use a cluster else
+ * try and leave leading space for the lower level headers.
+ */
+ siz += RPC_REPLYSIZ;
+ if (siz >= nfs_mbuf_minclsize) {
+ error = mbuf_getpacket(MBUF_WAITOK, &mrep);
+ } else {
+ error = mbuf_gethdr(MBUF_WAITOK, MBUF_TYPE_DATA, &mrep);
+ }
+ if (error) {
+ /* unable to allocate packet */
+ /* XXX should we keep statistics for these errors? */
+ return (error);
+ }
+ if (siz < nfs_mbuf_minclsize) {
+ /* leave space for lower level headers */
+ tl = mbuf_data(mrep);
+ tl += 80/sizeof(*tl); /* XXX max_hdr? XXX */
+ mbuf_setdata(mrep, tl, 6 * NFSX_UNSIGNED);
+ }
+ nfsm_chain_init(&nmrep, mrep);
+ nfsm_chain_add_32(error, &nmrep, nd->nd_retxid);
+ nfsm_chain_add_32(error, &nmrep, RPC_REPLY);
+ if (err == ERPCMISMATCH || (err & NFSERR_AUTHERR)) {
+ nfsm_chain_add_32(error, &nmrep, RPC_MSGDENIED);
+ if (err & NFSERR_AUTHERR) {
+ nfsm_chain_add_32(error, &nmrep, RPC_AUTHERR);
+ nfsm_chain_add_32(error, &nmrep, (err & ~NFSERR_AUTHERR));
+ } else {
+ nfsm_chain_add_32(error, &nmrep, RPC_MISMATCH);
+ nfsm_chain_add_32(error, &nmrep, RPC_VER2);
+ nfsm_chain_add_32(error, &nmrep, RPC_VER2);
}
- FSDBG(534, rep->r_xid, rep, rep->r_nmp, 0x102);
- *statep |= NFSSTA_WANTRCV;
- /*
- * We need to poll if we're P_NOREMOTEHANG so that we
- * call nfs_sigintr periodically above.
- */
- if (rep->r_procp != NULL &&
- (proc_noremotehang(rep->r_procp)) != 0)
- slptimeo = hz;
- tsleep((caddr_t)statep, slpflag | (PZERO - 1), "nfsrcvlk", slptimeo);
- if (slpflag == PCATCH) {
- slpflag = 0;
- slptimeo = 2 * hz;
+ } else {
+ /* reply status */
+ nfsm_chain_add_32(error, &nmrep, RPC_MSGACCEPTED);
+ if (nd->nd_gss_context != NULL) {
+ /* RPCSEC_GSS verifier */
+ error = nfs_gss_svc_verf_put(nd, &nmrep);
+ if (error) {
+ nfsm_chain_add_32(error, &nmrep, RPC_SYSTEM_ERR);
+ goto done;
+ }
+ } else {
+ /* RPCAUTH_NULL verifier */
+ nfsm_chain_add_32(error, &nmrep, RPCAUTH_NULL);
+ nfsm_chain_add_32(error, &nmrep, 0);
}
- /*
- * Make sure while we slept that the mountpoint didn't go away.
- * nfs_sigintr and caller nfs_reply expect it intact.
- */
- if (!rep->r_nmp) {
- FSDBG_BOT(534, rep->r_xid, rep, rep->r_nmp, 0x103);
- return (ENXIO); /* don't have lock until out of loop */
+ /* accepted status */
+ switch (err) {
+ case EPROGUNAVAIL:
+ nfsm_chain_add_32(error, &nmrep, RPC_PROGUNAVAIL);
+ break;
+ case EPROGMISMATCH:
+ nfsm_chain_add_32(error, &nmrep, RPC_PROGMISMATCH);
+ /* XXX hard coded versions? */
+ nfsm_chain_add_32(error, &nmrep, NFS_VER2);
+ nfsm_chain_add_32(error, &nmrep, NFS_VER3);
+ break;
+ case EPROCUNAVAIL:
+ nfsm_chain_add_32(error, &nmrep, RPC_PROCUNAVAIL);
+ break;
+ case EBADRPC:
+ nfsm_chain_add_32(error, &nmrep, RPC_GARBAGE);
+ break;
+ default:
+ nfsm_chain_add_32(error, &nmrep, RPC_SUCCESS);
+ if (nd->nd_gss_context != NULL)
+ error = nfs_gss_svc_prepare_reply(nd, &nmrep);
+ if (err != NFSERR_RETVOID)
+ nfsm_chain_add_32(error, &nmrep,
+ (err ? nfsrv_errmap(nd, err) : 0));
+ break;
}
}
- /*
- * nfs_reply will handle it if reply already arrived.
- * (We may have slept or been preempted).
- */
- FSDBG_BOT(534, rep->r_xid, rep, rep->r_nmp, *statep);
- *statep |= NFSSTA_RCVLOCK;
+
+done:
+ nfsm_chain_build_done(error, &nmrep);
+ if (error) {
+ /* error composing reply header */
+ /* XXX should we keep statistics for these errors? */
+ mbuf_freem(mrep);
+ return (error);
+ }
+
+ *nmrepp = nmrep;
+ if ((err != 0) && (err != NFSERR_RETVOID))
+ OSAddAtomic64(1, &nfsstats.srvrpc_errs);
return (0);
}
/*
- * Unlock the stream socket for others.
+ * The nfs server send routine.
+ *
+ * - return EINTR or ERESTART if interrupted by a signal
+ * - return EPIPE if a connection is lost for connection based sockets (TCP...)
+ * - do any cleanup required by recoverable socket errors (???)
*/
-static void
-nfs_rcvunlock(struct nfsreq *rep)
+int
+nfsrv_send(struct nfsrv_sock *slp, mbuf_t nam, mbuf_t top)
{
- int *statep;
-
- if (rep->r_nmp == NULL)
- return;
- statep = &rep->r_nmp->nm_state;
+ int error;
+ socket_t so = slp->ns_so;
+ struct sockaddr *sendnam;
+ struct msghdr msg;
- FSDBG(533, statep, *statep, 0, 0);
- if ((*statep & NFSSTA_RCVLOCK) == 0)
- panic("nfs rcvunlock");
- *statep &= ~NFSSTA_RCVLOCK;
- if (*statep & NFSSTA_WANTRCV) {
- *statep &= ~NFSSTA_WANTRCV;
- wakeup((caddr_t)statep);
+ bzero(&msg, sizeof(msg));
+ if (nam && !sock_isconnected(so) && (slp->ns_sotype != SOCK_STREAM)) {
+ if ((sendnam = mbuf_data(nam))) {
+ msg.msg_name = (caddr_t)sendnam;
+ msg.msg_namelen = sendnam->sa_len;
+ }
}
-}
+ error = sock_sendmbuf(so, &msg, top, 0, NULL);
+ if (!error)
+ return (0);
+ log(LOG_INFO, "nfsd send error %d\n", error);
+
+ if ((error == EWOULDBLOCK) && (slp->ns_sotype == SOCK_STREAM))
+ error = EPIPE; /* zap TCP sockets if they time out on send */
+
+ /* Handle any recoverable (soft) socket errors here. (???) */
+ if (error != EINTR && error != ERESTART && error != EIO &&
+ error != EWOULDBLOCK && error != EPIPE)
+ error = 0;
+ return (error);
+}
-#ifndef NFS_NOSERVER
/*
* Socket upcall routine for the nfsd sockets.
- * The caddr_t arg is a pointer to the "struct nfssvc_sock".
+ * The caddr_t arg is a pointer to the "struct nfsrv_sock".
* Essentially do as much as possible non-blocking, else punt and it will
* be called with MBUF_WAITOK from an nfsd.
*/
void
-nfsrv_rcv(socket_t so, caddr_t arg, int waitflag)
+nfsrv_rcv(socket_t so, void *arg, int waitflag)
{
- struct nfssvc_sock *slp = (struct nfssvc_sock *)arg;
+ struct nfsrv_sock *slp = arg;
- if (!nfs_numnfsd || !(slp->ns_flag & SLP_VALID))
+ if (!nfsd_thread_count || !(slp->ns_flag & SLP_VALID))
return;
lck_rw_lock_exclusive(&slp->ns_rwlock);
/* Note: ns_rwlock gets dropped when called with MBUF_DONTWAIT */
}
void
-nfsrv_rcv_locked(socket_t so, struct nfssvc_sock *slp, int waitflag)
+nfsrv_rcv_locked(socket_t so, struct nfsrv_sock *slp, int waitflag)
{
mbuf_t m, mp, mhck, m2;
int ns_flag=0, error;
if (slp->ns_sotype == SOCK_STREAM) {
/*
* If there are already records on the queue, defer soreceive()
- * to an nfsd so that there is feedback to the TCP layer that
+ * to an(other) nfsd so that there is feedback to the TCP layer that
* the nfs servers are heavily loaded.
*/
- if (slp->ns_rec && waitflag == MBUF_DONTWAIT) {
+ if (slp->ns_rec) {
ns_flag = SLP_NEEDQ;
goto dorecs;
}
error = sock_receivembuf(so, NULL, &mp, MSG_DONTWAIT, &bytes_read);
if (error || mp == NULL) {
if (error == EWOULDBLOCK)
- ns_flag = SLP_NEEDQ;
+ ns_flag = (waitflag == MBUF_DONTWAIT) ? SLP_NEEDQ : 0;
else
ns_flag = SLP_DISCONN;
goto dorecs;
}
} else {
struct sockaddr_storage nam;
-
+
+ if (slp->ns_reccnt >= nfsrv_sock_max_rec_queue_length) {
+ /* already have max # RPC records queued on this socket */
+ ns_flag = SLP_NEEDQ;
+ goto dorecs;
+ }
+
bzero(&msg, sizeof(msg));
msg.msg_name = (caddr_t)&nam;
msg.msg_namelen = sizeof(nam);
-
+
do {
bytes_read = 1000000000;
error = sock_receivembuf(so, &msg, &mp, MSG_DONTWAIT | MSG_NEEDSA, &bytes_read);
}
if (slp->ns_recend)
mbuf_setnextpkt(slp->ns_recend, m);
- else
+ else {
slp->ns_rec = m;
+ slp->ns_flag |= SLP_DOREC;
+ }
slp->ns_recend = m;
mbuf_setnextpkt(m, NULL);
+ slp->ns_reccnt++;
}
-#if 0
- if (error) {
- /*
- * This may be needed in the future to support
- * non-byte-stream connection-oriented protocols
- * such as SCTP.
- */
- /*
- * This (slp->ns_sotype == SOCK_STREAM) should really
- * be a check for PR_CONNREQUIRED.
- */
- if ((slp->ns_sotype == SOCK_STREAM)
- && error != EWOULDBLOCK) {
- ns_flag = SLP_DISCONN;
- goto dorecs;
- }
- }
-#endif
} while (mp);
}
if (ns_flag)
slp->ns_flag |= ns_flag;
if (waitflag == MBUF_DONTWAIT) {
- int wake = (slp->ns_rec || (slp->ns_flag & (SLP_NEEDQ | SLP_DISCONN)));
+ int wake = (slp->ns_flag & SLP_WORKTODO);
lck_rw_done(&slp->ns_rwlock);
- if (wake && nfs_numnfsd) {
+ if (wake && nfsd_thread_count) {
lck_mtx_lock(nfsd_mutex);
nfsrv_wakenfsd(slp);
lck_mtx_unlock(nfsd_mutex);
* stream socket. The "waitflag" argument indicates whether or not it
* can sleep.
*/
-static int
-nfsrv_getstream(slp, waitflag)
- struct nfssvc_sock *slp;
- int waitflag;
+int
+nfsrv_getstream(struct nfsrv_sock *slp, int waitflag)
{
mbuf_t m;
char *cp1, *cp2, *mdata;
int len, mlen, error;
mbuf_t om, m2, recm;
- u_long recmark;
+ u_int32_t recmark;
if (slp->ns_flag & SLP_GETSTREAM)
panic("nfs getstream");
slp->ns_flag |= SLP_LASTFRAG;
else
slp->ns_flag &= ~SLP_LASTFRAG;
- if (slp->ns_reclen < NFS_MINPACKET || slp->ns_reclen > NFS_MAXPACKET) {
+ if (slp->ns_reclen <= 0 || slp->ns_reclen > NFS_MAXPACKET) {
slp->ns_flag &= ~SLP_GETSTREAM;
return (EPERM);
}
if (slp->ns_frag == NULL) {
slp->ns_frag = recm;
} else {
- m = slp->ns_frag;
+ m = slp->ns_frag;
while ((m2 = mbuf_next(m)))
m = m2;
if ((error = mbuf_setnext(m, recm)))
if (slp->ns_flag & SLP_LASTFRAG) {
if (slp->ns_recend)
mbuf_setnextpkt(slp->ns_recend, slp->ns_frag);
- else
+ else {
slp->ns_rec = slp->ns_frag;
+ slp->ns_flag |= SLP_DOREC;
+ }
slp->ns_recend = slp->ns_frag;
slp->ns_frag = NULL;
}
* Parse an RPC header.
*/
int
-nfsrv_dorec(slp, nfsd, ndp)
- struct nfssvc_sock *slp;
- struct nfsd *nfsd;
- struct nfsrv_descript **ndp;
+nfsrv_dorec(
+ struct nfsrv_sock *slp,
+ struct nfsd *nfsd,
+ struct nfsrv_descript **ndp)
{
mbuf_t m;
mbuf_t nam;
struct nfsrv_descript *nd;
- int error;
+ int error = 0;
*ndp = NULL;
- if ((slp->ns_flag & SLP_VALID) == 0 || (slp->ns_rec == NULL))
+ if (!(slp->ns_flag & (SLP_VALID|SLP_DOREC)) || (slp->ns_rec == NULL))
return (ENOBUFS);
MALLOC_ZONE(nd, struct nfsrv_descript *,
sizeof (struct nfsrv_descript), M_NFSRVDESC, M_WAITOK);
slp->ns_rec = mbuf_nextpkt(m);
if (slp->ns_rec)
mbuf_setnextpkt(m, NULL);
- else
+ else {
+ slp->ns_flag &= ~SLP_DOREC;
slp->ns_recend = NULL;
+ }
+ slp->ns_reccnt--;
if (mbuf_type(m) == MBUF_TYPE_SONAME) {
nam = m;
m = mbuf_next(m);
panic("nfsrv_dorec: mbuf_setnext failed %d\n", error);
} else
nam = NULL;
- nd->nd_md = nd->nd_mrep = m;
nd->nd_nam2 = nam;
- nd->nd_dpos = mbuf_data(m);
- error = nfs_getreq(nd, nfsd, TRUE);
+ nfsm_chain_dissect_init(error, &nd->nd_nmreq, m);
+ if (!error)
+ error = nfsrv_getreq(nd);
if (error) {
if (nam)
mbuf_freem(nam);
- FREE_ZONE((caddr_t)nd, sizeof *nd, M_NFSRVDESC);
+ if (nd->nd_gss_context)
+ nfs_gss_svc_ctx_deref(nd->nd_gss_context);
+ FREE_ZONE(nd, sizeof(*nd), M_NFSRVDESC);
return (error);
}
+ nd->nd_mrep = NULL;
*ndp = nd;
nfsd->nfsd_nd = nd;
return (0);
* - fill in the cred struct.
*/
int
-nfs_getreq(nd, nfsd, has_header)
- struct nfsrv_descript *nd;
- struct nfsd *nfsd;
- int has_header;
+nfsrv_getreq(struct nfsrv_descript *nd)
{
+ struct nfsm_chain *nmreq;
int len, i;
- u_long *tl;
- long t1;
- uio_t uiop;
- caddr_t dpos, cp2, cp;
- u_long nfsvers, auth_type;
- uid_t nickuid;
- int error = 0, ticklen;
- mbuf_t mrep, md;
- struct nfsuid *nuidp;
+ u_int32_t nfsvers, auth_type;
+ int error = 0;
uid_t user_id;
gid_t group_id;
int ngroups;
- struct ucred temp_cred;
- struct timeval tvin, tvout, now;
- char uio_buf[ UIO_SIZEOF(1) ];
-#if 0 /* until encrypted keys are implemented */
- NFSKERBKEYSCHED_T keys; /* stores key schedule */
-#endif
+ uint32_t val;
nd->nd_cr = NULL;
-
- mrep = nd->nd_mrep;
- md = nd->nd_md;
- dpos = nd->nd_dpos;
- if (has_header) {
- nfsm_dissect(tl, u_long *, 10 * NFSX_UNSIGNED);
- nd->nd_retxid = fxdr_unsigned(u_long, *tl++);
- if (*tl++ != rpc_call) {
- mbuf_freem(mrep);
- return (EBADRPC);
- }
- } else
- nfsm_dissect(tl, u_long *, 8 * NFSX_UNSIGNED);
+ nd->nd_gss_context = NULL;
+ nd->nd_gss_seqnum = 0;
+ nd->nd_gss_mb = NULL;
+
+ user_id = group_id = -2;
+ val = auth_type = len = 0;
+
+ nmreq = &nd->nd_nmreq;
+ nfsm_chain_get_32(error, nmreq, nd->nd_retxid); // XID
+ nfsm_chain_get_32(error, nmreq, val); // RPC Call
+ if (!error && (val != RPC_CALL))
+ error = EBADRPC;
+ nfsmout_if(error);
nd->nd_repstat = 0;
- nd->nd_flag = 0;
- if (*tl++ != rpc_vers) {
+ nfsm_chain_get_32(error, nmreq, val); // RPC Version
+ nfsmout_if(error);
+ if (val != RPC_VER2) {
nd->nd_repstat = ERPCMISMATCH;
nd->nd_procnum = NFSPROC_NOOP;
return (0);
}
- if (*tl != nfs_prog) {
+ nfsm_chain_get_32(error, nmreq, val); // RPC Program Number
+ nfsmout_if(error);
+ if (val != NFS_PROG) {
nd->nd_repstat = EPROGUNAVAIL;
nd->nd_procnum = NFSPROC_NOOP;
return (0);
}
- tl++;
- nfsvers = fxdr_unsigned(u_long, *tl++);
+ nfsm_chain_get_32(error, nmreq, nfsvers);// NFS Version Number
+ nfsmout_if(error);
if ((nfsvers < NFS_VER2) || (nfsvers > NFS_VER3)) {
nd->nd_repstat = EPROGMISMATCH;
nd->nd_procnum = NFSPROC_NOOP;
return (0);
}
- else if (nfsvers == NFS_VER3)
- nd->nd_flag = ND_NFSV3;
- nd->nd_procnum = fxdr_unsigned(u_long, *tl++);
- if (nd->nd_procnum == NFSPROC_NULL)
- return (0);
+ nd->nd_vers = nfsvers;
+ nfsm_chain_get_32(error, nmreq, nd->nd_procnum);// NFS Procedure Number
+ nfsmout_if(error);
if ((nd->nd_procnum >= NFS_NPROCS) ||
- (!nd->nd_flag && nd->nd_procnum > NFSV2PROC_STATFS)) {
+ ((nd->nd_vers == NFS_VER2) && (nd->nd_procnum > NFSV2PROC_STATFS))) {
nd->nd_repstat = EPROCUNAVAIL;
nd->nd_procnum = NFSPROC_NOOP;
return (0);
}
- if ((nd->nd_flag & ND_NFSV3) == 0)
+ if (nfsvers != NFS_VER3)
nd->nd_procnum = nfsv3_procid[nd->nd_procnum];
- auth_type = *tl++;
- len = fxdr_unsigned(int, *tl++);
- if (len < 0 || len > RPCAUTH_MAXSIZ) {
- mbuf_freem(mrep);
- return (EBADRPC);
- }
-
- nd->nd_flag &= ~ND_KERBAUTH;
- /*
- * Handle auth_unix or auth_kerb.
- */
- if (auth_type == rpc_auth_unix) {
- len = fxdr_unsigned(int, *++tl);
- if (len < 0 || len > NFS_MAXNAMLEN) {
- mbuf_freem(mrep);
- return (EBADRPC);
- }
- bzero(&temp_cred, sizeof(temp_cred));
- nfsm_adv(nfsm_rndup(len));
- nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED);
- user_id = fxdr_unsigned(uid_t, *tl++);
- group_id = fxdr_unsigned(gid_t, *tl++);
- temp_cred.cr_groups[0] = group_id;
- len = fxdr_unsigned(int, *tl);
- if (len < 0 || len > RPCAUTH_UNIXGIDS) {
- mbuf_freem(mrep);
- return (EBADRPC);
- }
- nfsm_dissect(tl, u_long *, (len + 2) * NFSX_UNSIGNED);
+ nfsm_chain_get_32(error, nmreq, auth_type); // Auth Flavor
+ nfsm_chain_get_32(error, nmreq, len); // Auth Length
+ if (!error && (len < 0 || len > RPCAUTH_MAXSIZ))
+ error = EBADRPC;
+ nfsmout_if(error);
+
+ /* Handle authentication */
+ if (auth_type == RPCAUTH_SYS) {
+ struct posix_cred temp_pcred;
+ if (nd->nd_procnum == NFSPROC_NULL)
+ return (0);
+ nd->nd_sec = RPCAUTH_SYS;
+ nfsm_chain_adv(error, nmreq, NFSX_UNSIGNED); // skip stamp
+ nfsm_chain_get_32(error, nmreq, len); // hostname length
+ if (len < 0 || len > NFS_MAXNAMLEN)
+ error = EBADRPC;
+ nfsm_chain_adv(error, nmreq, nfsm_rndup(len)); // skip hostname
+ nfsmout_if(error);
+
+ /* create a temporary credential using the bits from the wire */
+ bzero(&temp_pcred, sizeof(temp_pcred));
+ nfsm_chain_get_32(error, nmreq, user_id);
+ nfsm_chain_get_32(error, nmreq, group_id);
+ temp_pcred.cr_groups[0] = group_id;
+ nfsm_chain_get_32(error, nmreq, len); // extra GID count
+ if ((len < 0) || (len > RPCAUTH_UNIXGIDS))
+ error = EBADRPC;
+ nfsmout_if(error);
for (i = 1; i <= len; i++)
- if (i < NGROUPS)
- temp_cred.cr_groups[i] = fxdr_unsigned(gid_t, *tl++);
- else
- tl++;
+ if (i < NGROUPS)
+ nfsm_chain_get_32(error, nmreq, temp_pcred.cr_groups[i]);
+ else
+ nfsm_chain_adv(error, nmreq, NFSX_UNSIGNED);
+ nfsmout_if(error);
ngroups = (len >= NGROUPS) ? NGROUPS : (len + 1);
if (ngroups > 1)
- nfsrvw_sort(&temp_cred.cr_groups[0], ngroups);
- len = fxdr_unsigned(int, *++tl);
- if (len < 0 || len > RPCAUTH_MAXSIZ) {
- mbuf_freem(mrep);
- return (EBADRPC);
- }
- temp_cred.cr_uid = user_id;
- temp_cred.cr_ngroups = ngroups;
- nd->nd_cr = kauth_cred_create(&temp_cred);
+ nfsrv_group_sort(&temp_pcred.cr_groups[0], ngroups);
+ nfsm_chain_adv(error, nmreq, NFSX_UNSIGNED); // verifier flavor (should be AUTH_NONE)
+ nfsm_chain_get_32(error, nmreq, len); // verifier length
+ if (len < 0 || len > RPCAUTH_MAXSIZ)
+ error = EBADRPC;
+ if (len > 0)
+ nfsm_chain_adv(error, nmreq, nfsm_rndup(len));
+
+ /* request creation of a real credential */
+ temp_pcred.cr_uid = user_id;
+ temp_pcred.cr_ngroups = ngroups;
+ nd->nd_cr = posix_cred_create(&temp_pcred);
if (nd->nd_cr == NULL) {
nd->nd_repstat = ENOMEM;
nd->nd_procnum = NFSPROC_NOOP;
return (0);
}
- if (len > 0)
- nfsm_adv(nfsm_rndup(len));
- } else if (auth_type == rpc_auth_kerb) {
- switch (fxdr_unsigned(int, *tl++)) {
- case RPCAKN_FULLNAME:
- ticklen = fxdr_unsigned(int, *tl);
- *((u_long *)nfsd->nfsd_authstr) = *tl;
- uiop = uio_createwithbuffer(1, 0, UIO_SYSSPACE, UIO_READ,
- &uio_buf[0], sizeof(uio_buf));
- if (!uiop) {
- nd->nd_repstat = ENOMEM;
- nd->nd_procnum = NFSPROC_NOOP;
- return (0);
- }
-
- // LP64todo - fix this
- nfsd->nfsd_authlen = (nfsm_rndup(ticklen) + (NFSX_UNSIGNED * 2));
- if ((nfsm_rndup(ticklen) + NFSX_UNSIGNED) > (len - 2 * NFSX_UNSIGNED)) {
- mbuf_freem(mrep);
- return (EBADRPC);
- }
- uio_addiov(uiop, CAST_USER_ADDR_T(&nfsd->nfsd_authstr[4]), RPCAUTH_MAXSIZ - 4);
- // LP64todo - fix this
- nfsm_mtouio(uiop, uio_resid(uiop));
- nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED);
- if (*tl++ != rpc_auth_kerb ||
- fxdr_unsigned(int, *tl) != 4 * NFSX_UNSIGNED) {
- printf("Bad kerb verifier\n");
- nd->nd_repstat = (NFSERR_AUTHERR|AUTH_BADVERF);
- nd->nd_procnum = NFSPROC_NOOP;
- return (0);
- }
- nfsm_dissect(cp, caddr_t, 4 * NFSX_UNSIGNED);
- tl = (u_long *)cp;
- if (fxdr_unsigned(int, *tl) != RPCAKN_FULLNAME) {
- printf("Not fullname kerb verifier\n");
- nd->nd_repstat = (NFSERR_AUTHERR|AUTH_BADVERF);
- nd->nd_procnum = NFSPROC_NOOP;
- return (0);
- }
- cp += NFSX_UNSIGNED;
- bcopy(cp, nfsd->nfsd_verfstr, 3 * NFSX_UNSIGNED);
- nfsd->nfsd_verflen = 3 * NFSX_UNSIGNED;
- nd->nd_flag |= ND_KERBFULL;
- nfsd->nfsd_flag |= NFSD_NEEDAUTH;
- break;
- case RPCAKN_NICKNAME:
- if (len != 2 * NFSX_UNSIGNED) {
- printf("Kerb nickname short\n");
- nd->nd_repstat = (NFSERR_AUTHERR|AUTH_BADCRED);
- nd->nd_procnum = NFSPROC_NOOP;
- return (0);
- }
- nickuid = fxdr_unsigned(uid_t, *tl);
- nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED);
- if (*tl++ != rpc_auth_kerb ||
- fxdr_unsigned(int, *tl) != 3 * NFSX_UNSIGNED) {
- printf("Kerb nick verifier bad\n");
- nd->nd_repstat = (NFSERR_AUTHERR|AUTH_BADVERF);
- nd->nd_procnum = NFSPROC_NOOP;
- return (0);
- }
- nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED);
- tvin.tv_sec = *tl++;
- tvin.tv_usec = *tl;
-
- for (nuidp = NUIDHASH(nfsd->nfsd_slp,nickuid)->lh_first;
- nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
- if (kauth_cred_getuid(nuidp->nu_cr) == nickuid &&
- (!nd->nd_nam2 ||
- netaddr_match(NU_NETFAM(nuidp),
- &nuidp->nu_haddr, nd->nd_nam2)))
- break;
- }
- if (!nuidp) {
- nd->nd_repstat =
- (NFSERR_AUTHERR|AUTH_REJECTCRED);
- nd->nd_procnum = NFSPROC_NOOP;
- return (0);
- }
-
- /*
- * Now, decrypt the timestamp using the session key
- * and validate it.
- */
-#if NFSKERB
- XXX
-#endif
-
- tvout.tv_sec = fxdr_unsigned(long, tvout.tv_sec);
- tvout.tv_usec = fxdr_unsigned(long, tvout.tv_usec);
- microtime(&now);
- if (nuidp->nu_expire < now.tv_sec ||
- nuidp->nu_timestamp.tv_sec > tvout.tv_sec ||
- (nuidp->nu_timestamp.tv_sec == tvout.tv_sec &&
- nuidp->nu_timestamp.tv_usec > tvout.tv_usec)) {
- nuidp->nu_expire = 0;
- nd->nd_repstat =
- (NFSERR_AUTHERR|AUTH_REJECTVERF);
- nd->nd_procnum = NFSPROC_NOOP;
- return (0);
- }
- bzero(&temp_cred, sizeof(temp_cred));
- ngroups = nuidp->nu_cr->cr_ngroups;
- for (i = 0; i < ngroups; i++)
- temp_cred.cr_groups[i] = nuidp->nu_cr->cr_groups[i];
- if (ngroups > 1)
- nfsrvw_sort(&temp_cred.cr_groups[0], ngroups);
-
- temp_cred.cr_uid = kauth_cred_getuid(nuidp->nu_cr);
- temp_cred.cr_ngroups = ngroups;
- nd->nd_cr = kauth_cred_create(&temp_cred);
- if (!nd->nd_cr) {
- nd->nd_repstat = ENOMEM;
- nd->nd_procnum = NFSPROC_NOOP;
- return (0);
- }
- nd->nd_flag |= ND_KERBNICK;
- };
+ } else if (auth_type == RPCSEC_GSS) {
+ error = nfs_gss_svc_cred_get(nd, nmreq);
+ if (error) {
+ if (error == EINVAL)
+ goto nfsmout; // drop the request
+ nd->nd_repstat = error;
+ nd->nd_procnum = NFSPROC_NOOP;
+ return (0);
+ }
} else {
+ if (nd->nd_procnum == NFSPROC_NULL) // assume it's AUTH_NONE
+ return (0);
nd->nd_repstat = (NFSERR_AUTHERR | AUTH_REJECTCRED);
nd->nd_procnum = NFSPROC_NOOP;
return (0);
}
-
- nd->nd_md = md;
- nd->nd_dpos = dpos;
return (0);
nfsmout:
if (IS_VALID_CRED(nd->nd_cr))
kauth_cred_unref(&nd->nd_cr);
+ nfsm_chain_cleanup(nmreq);
return (error);
}
/*
* Search for a sleeping nfsd and wake it up.
- * SIDE EFFECT: If none found, set NFSD_CHECKSLP flag, so that one of the
- * running nfsds will go look for the work in the nfssvc_sock list.
+ * SIDE EFFECT: If none found, make sure the socket is queued up so that one
+ * of the running nfsds will go look for the work in the nfsrv_sockwait list.
* Note: Must be called with nfsd_mutex held.
*/
void
-nfsrv_wakenfsd(struct nfssvc_sock *slp)
+nfsrv_wakenfsd(struct nfsrv_sock *slp)
{
struct nfsd *nd;
return;
lck_rw_lock_exclusive(&slp->ns_rwlock);
-
- if (nfsd_waiting) {
- TAILQ_FOREACH(nd, &nfsd_head, nfsd_chain) {
- if (nd->nfsd_flag & NFSD_WAITING) {
- nd->nfsd_flag &= ~NFSD_WAITING;
- if (nd->nfsd_slp)
- panic("nfsd wakeup");
- slp->ns_sref++;
- nd->nfsd_slp = slp;
- lck_rw_done(&slp->ns_rwlock);
- wakeup((caddr_t)nd);
- return;
- }
- }
+ /* if there's work to do on this socket, make sure it's queued up */
+ if ((slp->ns_flag & SLP_WORKTODO) && !(slp->ns_flag & SLP_QUEUED)) {
+ TAILQ_INSERT_TAIL(&nfsrv_sockwait, slp, ns_svcq);
+ slp->ns_flag |= SLP_WAITQ;
}
-
- slp->ns_flag |= SLP_DOREC;
-
lck_rw_done(&slp->ns_rwlock);
- nfsd_head_flag |= NFSD_CHECKSLP;
-}
-#endif /* NFS_NOSERVER */
-
-static int
-nfs_msg(proc_t p,
- const char *server,
- const char *msg,
- int error)
-{
- tpr_t tpr;
-
- if (p)
- tpr = tprintf_open(p);
- else
- tpr = NULL;
- if (error)
- tprintf(tpr, "nfs server %s: %s, error %d\n", server, msg,
- error);
- else
- tprintf(tpr, "nfs server %s: %s\n", server, msg);
- tprintf_close(tpr);
- return (0);
-}
-
-void
-nfs_down(nmp, proc, error, flags, msg)
- struct nfsmount *nmp;
- proc_t proc;
- int error, flags;
- const char *msg;
-{
- if (nmp == NULL)
+ /* wake up a waiting nfsd, if possible */
+ nd = TAILQ_FIRST(&nfsd_queue);
+ if (!nd)
return;
- if ((flags & NFSSTA_TIMEO) && !(nmp->nm_state & NFSSTA_TIMEO)) {
- vfs_event_signal(&vfs_statfs(nmp->nm_mountp)->f_fsid, VQ_NOTRESP, 0);
- nmp->nm_state |= NFSSTA_TIMEO;
- }
- if ((flags & NFSSTA_LOCKTIMEO) && !(nmp->nm_state & NFSSTA_LOCKTIMEO)) {
- vfs_event_signal(&vfs_statfs(nmp->nm_mountp)->f_fsid, VQ_NOTRESPLOCK, 0);
- nmp->nm_state |= NFSSTA_LOCKTIMEO;
- }
- nfs_msg(proc, vfs_statfs(nmp->nm_mountp)->f_mntfromname, msg, error);
-}
-void
-nfs_up(nmp, proc, flags, msg)
- struct nfsmount *nmp;
- proc_t proc;
- int flags;
- const char *msg;
-{
- if (nmp == NULL)
- return;
- if (msg)
- nfs_msg(proc, vfs_statfs(nmp->nm_mountp)->f_mntfromname, msg, 0);
- if ((flags & NFSSTA_TIMEO) && (nmp->nm_state & NFSSTA_TIMEO)) {
- nmp->nm_state &= ~NFSSTA_TIMEO;
- vfs_event_signal(&vfs_statfs(nmp->nm_mountp)->f_fsid, VQ_NOTRESP, 1);
- }
- if ((flags & NFSSTA_LOCKTIMEO) && (nmp->nm_state & NFSSTA_LOCKTIMEO)) {
- nmp->nm_state &= ~NFSSTA_LOCKTIMEO;
- vfs_event_signal(&vfs_statfs(nmp->nm_mountp)->f_fsid, VQ_NOTRESPLOCK, 1);
- }
+ TAILQ_REMOVE(&nfsd_queue, nd, nfsd_queue);
+ nd->nfsd_flag &= ~NFSD_WAITING;
+ wakeup(nd);
}
+#endif /* NFSSERVER */
projects / apple / xnu.git / blobdiff