X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/4a3eedf9ecc9bbe3f3a5c6ce5e53ad199d639d32..15129b1c8dbb3650c63b70adb1cad9af601c6c17:/bsd/nfs/nfs_socket.c diff --git a/bsd/nfs/nfs_socket.c b/bsd/nfs/nfs_socket.c index 48694c9ee..c163bfa04 100644 --- a/bsd/nfs/nfs_socket.c +++ b/bsd/nfs/nfs_socket.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2000-2007 Apple Inc. All rights reserved. + * Copyright (c) 2000-2011 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * @@ -72,6 +72,7 @@ #include #include #include +#include #include #include #include @@ -83,7 +84,6 @@ #include #include #include -#include #include #include @@ -92,11 +92,13 @@ #include #include #include +#include #include #include #include +#include #include #include #include @@ -105,6 +107,8 @@ #include #include +#define NFS_SOCK_DBG(...) NFS_DBG(NFS_FAC_SOCK, 7, ## __VA_ARGS__) + /* XXX */ boolean_t current_thread_aborted(void); kern_return_t thread_terminate(thread_t); @@ -113,25 +117,57 @@ kern_return_t thread_terminate(thread_t); #if NFSSERVER int nfsrv_sock_max_rec_queue_length = 128; /* max # RPC records queued on (UDP) socket */ -static int nfsrv_getstream(struct nfsrv_sock *,int); -static int nfsrv_getreq(struct nfsrv_descript *); +int nfsrv_getstream(struct nfsrv_sock *,int); +int nfsrv_getreq(struct nfsrv_descript *); extern int nfsv3_procid[NFS_NPROCS]; #endif /* NFSSERVER */ -#if NFSCLIENT +/* + * 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); +} -static int nfs_connect_setup(struct nfsmount *); -static void nfs_reqdequeue(struct nfsreq *); -static void nfs_udp_rcv(socket_t, void*, int); -static void nfs_tcp_rcv(socket_t, void*, int); -static void nfs_request_match_reply(struct nfsmount *, mbuf_t); -static void nfs_softterm(struct nfsreq *); +#if NFSCLIENT -#ifdef NFS_SOCKET_DEBUGGING -#define NFS_SOCK_DBG(X) printf X -#else -#define NFS_SOCK_DBG(X) -#endif +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. @@ -183,483 +219,2660 @@ static int proct[NFS_NPROCS] = { static int nfs_backoff[8] = { 2, 4, 8, 16, 32, 64, 128, 256, }; /* - * Initialize socket state and perform setup for a new NFS connection. + * Increment location index to next address/server/location. + */ +void +nfs_location_next(struct nfs_fs_locations *nlp, struct nfs_location_index *nlip) +{ + 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; + + nlip->nli_loc = loc; + nlip->nli_serv = serv; + nlip->nli_addr = addr; +} + +/* + * Compare two location indices. */ int -nfs_connect(struct nfsmount *nmp) +nfs_location_index_cmp(struct nfs_location_index *nlip1, struct nfs_location_index *nlip2) { - socket_t so; - int error, on = 1, proto; - sock_upcall upcall; - struct sockaddr *saddr; - struct sockaddr_in sin; - struct timeval timeo; - u_short tport; + 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); +} - lck_mtx_lock(&nmp->nm_lock); - nmp->nm_sockflags |= NMSOCK_CONNECTING; - saddr = mbuf_data(nmp->nm_nam); - upcall = (nmp->nm_sotype == SOCK_STREAM) ? nfs_tcp_rcv : nfs_udp_rcv; - lck_mtx_unlock(&nmp->nm_lock); - error = sock_socket(saddr->sa_family, nmp->nm_sotype, - nmp->nm_soproto, upcall, nmp, &nmp->nm_so); - if (error) - goto bad; - lck_mtx_lock(&nmp->nm_lock); - so = nmp->nm_so; +/* + * Get the mntfromname (or path portion only) for a given location. + */ +void +nfs_location_mntfromname(struct nfs_fs_locations *locs, struct nfs_location_index idx, char *s, int size, int pathonly) +{ + 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'; + } + 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; + } +} - /* - * Some servers require that the client port be a reserved port number. - */ - if (saddr->sa_family == AF_INET && (nmp->nm_flag & NFSMNT_RESVPORT)) { - lck_mtx_unlock(&nmp->nm_lock); - 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); - while (((error = sock_bind(so, (struct sockaddr *) &sin)) == EADDRINUSE) && - (--tport > IPPORT_RESERVED / 2)) - sin.sin_port = htons(tport); - if (error) - goto bad; - lck_mtx_lock(&nmp->nm_lock); +/* + * NFS client connect socket upcall. + * (Used only during socket connect/search.) + */ +void +nfs_connect_upcall(socket_t so, void *arg, __unused int waitflag) +{ + struct nfs_socket *nso = arg; + size_t rcvlen; + mbuf_t m; + int error = 0, recv = 1; + + if (nso->nso_flags & NSO_CONNECTING) { + NFS_SOCK_DBG("nfs connect - socket %p upcall - connecting\n", nso); + wakeup(nso->nso_wake); + return; } - /* - * Protocols that do not require connections may be optionally left - * unconnected for servers that reply from a different address/port. - */ - if (nmp->nm_flag & NFSMNT_NOCONN) { - if (nmp->nm_sotype == SOCK_STREAM) { - error = ENOTCONN; - lck_mtx_unlock(&nmp->nm_lock); - goto bad; - } - } else { - int tocnt = 0, optlen = sizeof(error); - struct timespec ts = { 2, 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_unlock(&nmp->nm_lock); - error = sock_connect(so, mbuf_data(nmp->nm_nam), MSG_DONTWAIT); - if (error && (error != EINPROGRESS)) - goto bad; - lck_mtx_lock(&nmp->nm_lock); - while (!sock_isconnected(so)) { - if (tocnt++ == 15) /* log a warning if connect is taking a while */ - log(LOG_INFO, "nfs_connect: socket connect taking a while for %s\n", - vfs_statfs(nmp->nm_mountp)->f_mntfromname); - /* check for error on socket */ - sock_getsockopt(so, SOL_SOCKET, SO_ERROR, &error, &optlen); - if (error) { - log(LOG_INFO, "nfs_connect: socket error %d for %s\n", - error, vfs_statfs(nmp->nm_mountp)->f_mntfromname); - break; + /* 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; } - if (tocnt > 60) { - /* abort if this is taking too long */ - error = ENOTCONN; - break; + 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) { + if ((minvers > NFS_VER4) || (maxvers < NFS_VER2)) + error = EPROGMISMATCH; + else if ((NFS_VER3 >= minvers) && (NFS_VER3 <= maxvers)) + nso->nso_version = NFS_VER3; + else if ((NFS_VER2 >= minvers) && (NFS_VER2 <= maxvers)) + nso->nso_version = NFS_VER2; + else if ((NFS_VER4 >= minvers) && (NFS_VER4 <= maxvers)) + nso->nso_version = NFS_VER4; + } + if (!error && nso->nso_version) + accepted_status = RPC_SUCCESS; } - if ((error = nfs_sigintr(nmp, NULL, current_thread(), 1))) - break; - msleep(&nmp->nm_so, &nmp->nm_lock, PSOCK, "nfs_socket_connect", &ts); + 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; } - if (tocnt > 15) - log(LOG_INFO, "nfs_connect: socket connect %s for %s\n", - error ? "aborted" : "completed", - vfs_statfs(nmp->nm_mountp)->f_mntfromname); - if (error) { - lck_mtx_unlock(&nmp->nm_lock); - goto bad; + } + + 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); +} + +/* + * Create/initialize an nfs_socket structure. + */ +int +nfs_socket_create( + __unused struct nfsmount *nmp, + struct sockaddr *sa, + int sotype, + in_port_t port, + uint32_t protocol, + uint32_t vers, + int resvport, + struct nfs_socket **nsop) +{ + struct nfs_socket *nso; + struct timeval now; + int error; +#ifdef NFS_SOCKET_DEBUGGING + char naddr[MAX_IPv6_STR_LEN]; + void *sinaddr; + + 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, "", sizeof(naddr)); +#else + char naddr[1] = { 0 }; +#endif + + *nsop = NULL; + + /* 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); + } + 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; + + 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); } } + if (error) { + 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; + } + return (error); +} + +/* + * Destroy an nfs_socket structure. + */ +void +nfs_socket_destroy(struct nfs_socket *nso) +{ + 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) +{ /* * Set socket send/receive timeouts - * - Receive timeout shouldn't matter because all receives are performed + * - 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. */ - timeo.tv_usec = 0; - timeo.tv_sec = (nmp->nm_flag & NFSMNT_SOFT) ? 10 : 60; - error |= sock_setsockopt(so, SOL_SOCKET, SO_RCVTIMEO, &timeo, sizeof(timeo)); - error |= sock_setsockopt(so, SOL_SOCKET, SO_SNDTIMEO, &timeo, sizeof(timeo)); - if (error) { - log(LOG_INFO, "nfs_connect: socket timeout setting errors for %s\n", - vfs_statfs(nmp->nm_mountp)->f_mntfromname); - error = 0; - } + struct timeval timeo; + int on = 1, proto; - if (nmp->nm_sotype == SOCK_STREAM) { + 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(so, SOL_SOCKET, SO_KEEPALIVE, &on, sizeof(on)); + sock_setsockopt(nso->nso_so, SOL_SOCKET, SO_KEEPALIVE, &on, sizeof(on)); /* set nodelay for TCP */ - sock_gettype(so, NULL, NULL, &proto); + sock_gettype(nso->nso_so, NULL, NULL, &proto); if (proto == IPPROTO_TCP) - sock_setsockopt(so, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on)); + sock_setsockopt(nso->nso_so, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on)); } - - if (nmp->nm_sotype == SOCK_DGRAM) { /* set socket buffer sizes for UDP */ + if (nso->nso_sotype == SOCK_DGRAM) { /* set socket buffer sizes for UDP */ int reserve = NFS_UDPSOCKBUF; - error |= sock_setsockopt(so, SOL_SOCKET, SO_SNDBUF, &reserve, sizeof(reserve)); - error |= sock_setsockopt(so, SOL_SOCKET, SO_RCVBUF, &reserve, sizeof(reserve)); - if (error) { - log(LOG_INFO, "nfs_connect: socket buffer setting errors for %s\n", - vfs_statfs(nmp->nm_mountp)->f_mntfromname); - error = 0; - } + 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 */ - error = sock_setsockopt(so, SOL_SOCKET, SO_NOADDRERR, &on, sizeof(on)); - if (error) { - lck_mtx_unlock(&nmp->nm_lock); - goto bad; - } - /* just playin' it safe */ - sock_setsockopt(so, SOL_SOCKET, SO_UPCALLCLOSEWAIT, &on, sizeof(on)); + 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); +} - if (!(nmp->nm_flag & NFSMNT_INT)) - sock_nointerrupt(so, 1); +/* + * Release resources held in an nfs_socket_search. + */ +void +nfs_socket_search_cleanup(struct nfs_socket_search *nss) +{ + struct nfs_socket *nso, *nsonext; - /* Initialize socket state 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; - if (nmp->nm_sotype == SOCK_DGRAM) { - /* XXX do we really want to reset this on each reconnect? */ - nmp->nm_cwnd = NFS_MAXCWND / 2; /* Initial send window */ - nmp->nm_sent = 0; - } else if (nmp->nm_sotype == SOCK_STREAM) { - nmp->nm_markerleft = sizeof(nmp->nm_fragleft); - nmp->nm_fragleft = nmp->nm_reclen = 0; - nmp->nm_timeouts = 0; + 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); } - nmp->nm_sockflags &= ~NMSOCK_CONNECTING; - nmp->nm_sockflags |= NMSOCK_SETUP; - FSDBG(529, nmp, nmp->nm_state, nmp->nm_flag, nmp->nm_cwnd); - lck_mtx_unlock(&nmp->nm_lock); - error = nfs_connect_setup(nmp); -bad: - lck_mtx_lock(&nmp->nm_lock); - nmp->nm_sockflags &= ~(NMSOCK_CONNECTING|NMSOCK_SETUP); - if (!error) { - nmp->nm_sockflags |= NMSOCK_READY; - wakeup(&nmp->nm_sockflags); + if (nss->nss_sock) { + nfs_socket_destroy(nss->nss_sock); + nss->nss_sock = NULL; } - lck_mtx_unlock(&nmp->nm_lock); - if (error) - nfs_disconnect(nmp); - return (error); } -/* setup & confirm socket connection is functional */ -static int -nfs_connect_setup(struct nfsmount *nmp) +/* + * Prefer returning certain errors over others. + * This function returns a ranking of the given error. + */ +int +nfs_connect_error_class(int error) { - struct nfsm_chain nmreq, nmrep; - int error = 0, status; - u_int64_t xid; - - if (nmp->nm_vers >= NFS_VER4) { - error = nfs4_setclientid(nmp); - } else { - /* verify connection's OK by sending a NULL request */ - nfsm_chain_null(&nmreq); - nfsm_chain_null(&nmrep); - nfsm_chain_build_alloc_init(error, &nmreq, 0); - nfsm_chain_build_done(error, &nmreq); - nfsmout_if(error); - error = nfs_request2(NULL, nmp->nm_mountp, &nmreq, NFSPROC_NULL, - current_thread(), NULL, R_SETUP, &nmrep, &xid, &status); - if (!error) - error = status; -nfsmout: - nfsm_chain_cleanup(&nmreq); - nfsm_chain_cleanup(&nmrep); + 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); } - 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! + * Make sure a socket search returns the best error. */ -static int -nfs_reconnect(struct nfsmount *nmp) +void +nfs_socket_search_update_error(struct nfs_socket_search *nss, int error) { - struct nfsreq *rq; - struct timeval now; - thread_t thd = current_thread(); - int error, lastmsg, wentdown = 0; + if (nfs_connect_error_class(error) >= nfs_connect_error_class(nss->nss_error)) + nss->nss_error = error; +} - microuptime(&now); - lastmsg = now.tv_sec - (nmp->nm_tprintf_delay - nmp->nm_tprintf_initial_delay); +/* 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; + - nfs_disconnect(nmp); + NFS_SOCK_DBG("nfs connect %s nss_addrcnt = %d\n", + vfs_statfs(nmp->nm_mountp)->f_mntfromname, nss->nss_addrcnt); - while ((error = nfs_connect(nmp))) { - if (error == EINTR || error == ERESTART) + /* + * 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); - 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"); - wentdown = 1; + /* 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; } - 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); - return (error); + /* 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; } - if ((error = nfs_sigintr(nmp, NULL, thd, 1))) { - lck_mtx_unlock(&nmp->nm_lock); + + /* 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); + + 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); } - lck_mtx_unlock(&nmp->nm_lock); - tsleep(&lbolt, PSOCK, "nfs_reconnect_delay", 0); - if ((error = nfs_sigintr(nmp, NULL, thd, 0))) - return (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; } - if (wentdown) - nfs_up(nmp, thd, NFSSTA_TIMEO, "connected"); + if (nss->nss_addrcnt == 0 && nss->nss_last < 0) + nss->nss_last = now->tv_sec; + + return (error); +} - /* - * 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_ASYNC|R_ASYNCWAIT)) == R_ASYNC) - nfs_asyncio_resend(rq); +/* + * 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); } - lck_mtx_unlock(&rq->r_mtx); } } - lck_mtx_unlock(nfs_request_mutex); - return (0); + + return (0); /* Waiting to be connected */ } /* - * NFS disconnect. Clean up and unlink. + * nfs_connect_search_ping: Send a null proc on the nso socket. + */ +int +nfs_connect_search_ping(struct nfsmount *nmp, struct nfs_socket *nso, struct timeval *now) +{ + /* initiate a NULL RPC request */ + uint64_t xid = nso->nso_pingxid; + mbuf_t m, mreq = NULL; + struct msghdr msg; + size_t reqlen, sentlen; + uint32_t vers = nso->nso_version; + int error; + + 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 = NFS_VER3; + } + 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_disconnect(struct nfsmount *nmp) +nfs_connect_search_socket_found(struct nfsmount *nmp __unused, struct nfs_socket_search *nss, struct nfs_socket *nso) { - socket_t so; + 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 = NFS_VER3; + } + TAILQ_REMOVE(&nss->nss_socklist, nso, nso_link); + nss->nss_sockcnt--; + nss->nss_sock = nso; +} - lck_mtx_lock(&nmp->nm_lock); - if ((nmp->nm_sotype == SOCK_STREAM) && nmp->nm_m) { - mbuf_freem(nmp->nm_m); - nmp->nm_m = nmp->nm_mlast = NULL; +/* + * 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; } - if (nmp->nm_so) { - so = nmp->nm_so; - nmp->nm_so = NULL; - lck_mtx_unlock(&nmp->nm_lock); - sock_shutdown(so, SHUT_RDWR); - sock_close(so); - } else { - lck_mtx_unlock(&nmp->nm_lock); +} + +/* + * 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); } + /* - * mark an NFS mount as needing a reconnect/resends. + * Continue the socket search until we have something to report. */ -static void -nfs_need_reconnect(struct nfsmount *nmp) +int +nfs_connect_search_loop(struct nfsmount *nmp, struct nfs_socket_search *nss) { - struct nfsreq *rq; + 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); - lck_mtx_lock(&nmp->nm_lock); - nmp->nm_sockflags &= ~(NMSOCK_READY|NMSOCK_SETUP); - lck_mtx_unlock(&nmp->nm_lock); + /* 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; + } + } - /* - * 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_ASYNC|R_ASYNCWAIT)) == R_ASYNC) - nfs_asyncio_resend(rq); + /* 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; } - lck_mtx_unlock(&rq->r_mtx); } + + /* 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); } - lck_mtx_unlock(nfs_request_mutex); + + /* 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); } /* - * thread to handle miscellaneous async NFS socket work (reconnects/resends) + * 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. */ -static void -nfs_mount_sock_thread(void *arg, __unused wait_result_t wr) +int +nfs_connect(struct nfsmount *nmp, int verbose, int timeo) { - struct nfsmount *nmp = arg; - struct timespec ts = { 30, 0 }; - thread_t thd = current_thread(); - struct nfsreq *req; - struct timeval now; - int error, dofinish, force; + 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; + 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); + } + } - lck_mtx_lock(&nmp->nm_lock); + 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); - while (!(nmp->nm_sockflags & NMSOCK_READY) || !TAILQ_EMPTY(&nmp->nm_resendq)) { - if (nmp->nm_sockflags & NMSOCK_UNMOUNT) - break; - force = (nmp->nm_state & NFSSTA_FORCE); - /* do reconnect, if necessary */ - if (!(nmp->nm_sockflags & NMSOCK_READY) && !force) { - if (nmp->nm_reconnect_start <= 0) { - microuptime(&now); - nmp->nm_reconnect_start = now.tv_sec; + 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)) { + /* ...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) { + /* 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; + } 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; } - lck_mtx_unlock(&nmp->nm_lock); - NFS_SOCK_DBG(("nfs reconnect %s\n", vfs_statfs(nmp->nm_mountp)->f_mntfromname)); - if ((error = nfs_reconnect(nmp))) - printf("nfs_reconnect failed %d for %s\n", error, - vfs_statfs(nmp->nm_mountp)->f_mntfromname); - else - nmp->nm_reconnect_start = 0; - lck_mtx_lock(&nmp->nm_lock); } - /* do resends, if necessary/possible */ - while (((nmp->nm_sockflags & NMSOCK_READY) || force) && ((req = TAILQ_FIRST(&nmp->nm_resendq)))) { - if (req->r_resendtime) - microuptime(&now); - while (req && !force && 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); - 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); - lck_mtx_lock(&nmp->nm_lock); - continue; + 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 (!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 NFSv3 then NFSv2. */ + nfsvers = nmp->nm_vers ? nmp->nm_vers : NFS_VER3; + + 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); + 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 ((req->r_flags & R_RESTART) || req->r_gss_ctx) { - 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 (req->r_gss_ctx) { - nfs_gss_clnt_rpcdone(req); - error = nfs_gss_clnt_args_restore(req); - if (error == ENEEDAUTH) - req->r_xid = 0; + if (error && !nmp->nm_vers) { + nfsvers = NFS_VER2; + 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; } - NFS_SOCK_DBG(("nfs async%s restart: p %d x 0x%llx f 0x%x rtt %d\n", - req->r_gss_ctx ? " gss" : "", req->r_procnum, req->r_xid, - req->r_flags, req->r_rtt)); - error = !req->r_nmp ? ENXIO : 0; /* unmounted? */ - if (!error) - 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_rchain.tqe_next == NFSREQNOLIST) - 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); - 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 = !req->r_nmp ? ENXIO : 0; /* unmounted? */ - if (!error) - error = nfs_sigintr(nmp, req, req->r_thread, 0); + 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. */ + 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) { - lck_mtx_unlock(&req->r_mtx); - error = nfs_send(req, 0); - lck_mtx_lock(&req->r_mtx); - if (!error) { - if (req->r_rchain.tqe_next == NFSREQNOLIST) - req->r_flags &= ~R_RESENDQ; - wakeup(req); - lck_mtx_unlock(&req->r_mtx); - lck_mtx_lock(&nmp->nm_lock); - continue; - } + 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; } - req->r_error = error; - if (req->r_rchain.tqe_next == NFSREQNOLIST) - 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); - lck_mtx_lock(&nmp->nm_lock); + /* 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"); + 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); + } + nfs_mount_check_dead_timeout(nmp); + 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_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_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)) { + 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)) { + /* 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) && + (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)) && + ((req = TAILQ_FIRST(&nmp->nm_resendq)))) { + if (req->r_resendtime) + microuptime(&now); + while (req && !(nmp->nm_state & NFSSTA_FORCE) && 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); + 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); + 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 = !req->r_nmp ? ENXIO : 0; /* unmounted? */ + if (!error) + 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); + 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 = !req->r_nmp ? ENXIO : 0; /* unmounted? */ + if (!error) + 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); + 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); + lck_mtx_lock(&nmp->nm_lock); + } + if (nmp->nm_deadto_start) + nfs_mount_check_dead_timeout(nmp); + 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))) + 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))) + 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) + */ +void +nfs_mount_check_dead_timeout(struct nfsmount *nmp) +{ + struct timeval now; + + if (nmp->nm_deadto_start == 0) + return; + if (nmp->nm_state & NFSSTA_DEAD) + return; + nfs_is_squishy(nmp); + if (nmp->nm_curdeadtimeout <= 0) + return; + microuptime(&now); + if ((now.tv_sec - nmp->nm_deadto_start) < nmp->nm_curdeadtimeout) + return; + printf("nfs server %s: %sdead\n", vfs_statfs(nmp->nm_mountp)->f_mntfromname, + (nmp->nm_curdeadtimeout != nmp->nm_deadtimeout) ? "squished " : ""); + nmp->nm_state |= NFSSTA_DEAD; + vfs_event_signal(&vfs_statfs(nmp->nm_mountp)->f_fsid, VQ_DEAD, 0); +} + +/* + * 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; } - if (nmp->nm_sockflags & NMSOCK_READY) { - ts.tv_sec = TAILQ_EMPTY(&nmp->nm_resendq) ? 30 : 1; - msleep(&nmp->nm_sockthd, &nmp->nm_lock, PSOCK, "nfssockthread", &ts); - } else if (force) + } + + /* 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; } - if (nmp->nm_sockthd == thd) - nmp->nm_sockthd = NULL; - lck_mtx_unlock(&nmp->nm_lock); - wakeup(&nmp->nm_sockthd); - thread_terminate(thd); -} + /* 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; + } + } -/* 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); + return (error); } + + /* * The NFS client send routine. * @@ -667,7 +2880,7 @@ nfs_mount_sock_thread_wake(struct nfsmount *nmp) * Holds nfs_sndlock() for the duration of this call. * * - check for request termination (sigintr) - * - perform reconnect, if necessary + * - wait for reconnect, if necessary * - UDP: check the congestion window * - make a copy of the request to send * - UDP: update the congestion window @@ -689,7 +2902,7 @@ int nfs_send(struct nfsreq *req, int wait) { struct nfsmount *nmp; - socket_t so; + struct nfs_socket *nso; int error, error2, sotype, rexmit, slpflag = 0, needrecon; struct msghdr msg; struct sockaddr *sendnam; @@ -699,21 +2912,39 @@ nfs_send(struct nfsreq *req, int wait) again: error = nfs_sndlock(req); - if (error) + 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, req->r_thread, 0); + 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 ((req->r_flags & R_SETUP) && !(nmp->nm_sockflags & NMSOCK_SETUP)) { - /* a setup RPC but we're not in SETUP... must need reconnect */ + /* + * 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); - return (EPIPE); + 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. */ @@ -721,18 +2952,19 @@ again: lck_mtx_lock(&nmp->nm_lock); if (!(nmp->nm_sockflags & NMSOCK_READY) && !((nmp->nm_sockflags & NMSOCK_SETUP) && (req->r_flags & R_SETUP))) { - if (nmp->nm_flag & NFSMNT_INT) + 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)); + 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; @@ -744,6 +2976,17 @@ again: error = EIO; break; } + if (NMFLAG(nmp, 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))) @@ -752,15 +2995,23 @@ again: slpflag = 0; } lck_mtx_unlock(&nmp->nm_lock); - if (error) + 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; } - so = nmp->nm_so; + 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 (!so) { + 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); @@ -774,9 +3025,10 @@ again: 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 = ((nmp->nm_flag & NFSMNT_INT) && req->r_thread) ? PCATCH : 0; + 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) { @@ -809,7 +3061,7 @@ again: } else { /* * When retransmitting, turn timing off - * and divide congestion window by 2. + * and divide congestion window by 2. */ req->r_flags &= ~R_TIMING; nmp->nm_cwnd >>= 1; @@ -829,6 +3081,7 @@ again: 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); @@ -836,23 +3089,22 @@ again: } bzero(&msg, sizeof(msg)); - if (nmp->nm_nam && (sotype != SOCK_STREAM) && !sock_isconnected(so)) { - if ((sendnam = mbuf_data(nmp->nm_nam))) { - msg.msg_name = (caddr_t)sendnam; - msg.msg_namelen = sendnam->sa_len; - } + 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(so, &msg, mreqcopy, 0, &sentlen); + error = sock_sendmbuf(nso->nso_so, &msg, mreqcopy, 0, &sentlen); #ifdef NFS_SOCKET_DEBUGGING 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)); + NFS_SOCK_DBG("nfs_send: 0x%llx sent %d/%d error %d\n", + req->r_xid, (int)sentlen, (int)req->r_mreqlen, error); #endif 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; @@ -861,7 +3113,7 @@ again: /* SUCCESS */ req->r_flags &= ~R_RESENDERR; if (rexmit) - OSAddAtomic(1, (SInt32*)&nfsstats.rpcretries); + OSAddAtomic64(1, &nfsstats.rpcretries); req->r_flags |= R_SENT; if (req->r_flags & R_WAITSENT) { req->r_flags &= ~R_WAITSENT; @@ -891,13 +3143,13 @@ again: * For now, ignore them all */ if ((error != EINTR) && (error != ERESTART) && - (error != EWOULDBLOCK) && (error != EIO)) { + (error != EWOULDBLOCK) && (error != EIO) && (nso == nmp->nm_nso)) { int clearerror = 0, optlen = sizeof(clearerror); - sock_getsockopt(so, SOL_SOCKET, SO_ERROR, &clearerror, &optlen); + 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)); + NFS_SOCK_DBG("nfs_send: ignoring UDP socket error %d so %d\n", + error, clearerror); #endif } } @@ -923,8 +3175,8 @@ again: needrecon = 1; break; } - if (needrecon) { /* mark socket as needing reconnect */ - NFS_SOCK_DBG(("nfs_send: 0x%llx need reconnect %d\n", req->r_xid, error)); + 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); } @@ -943,6 +3195,9 @@ again: !req->r_nmp ? "" : vfs_statfs(req->r_nmp->nm_mountp)->f_mntfromname); + if (nfs_is_dead(error, nmp)) + error = EIO; + /* prefer request termination error over other errors */ error2 = nfs_sigintr(req->r_nmp, req, req->r_thread, 0); if (error2) @@ -969,24 +3224,23 @@ again: */ /* NFS client UDP socket upcall */ -static void +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) { - wakeup(&nmp->nm_so); - return; - } - - /* make sure we're on the current socket */ - if (nmp->nm_so != so) + 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); @@ -996,141 +3250,72 @@ nfs_udp_rcv(socket_t so, void *arg, __unused int waitflag) if (error && (error != EWOULDBLOCK)) { /* problems with the socket... mark for reconnection */ - NFS_SOCK_DBG(("nfs_udp_rcv: need reconnect %d\n", error)); + NFS_SOCK_DBG("nfs_udp_rcv: need reconnect %d\n", error); nfs_need_reconnect(nmp); } } /* NFS client TCP socket upcall */ -static void +void nfs_tcp_rcv(socket_t so, void *arg, __unused int waitflag) { struct nfsmount *nmp = arg; - struct iovec_32 aio; - struct msghdr msg; - size_t rcvlen; + struct nfs_socket *nso = nmp->nm_nso; + struct nfs_rpc_record_state nrrs; mbuf_t m; int error = 0; - int recv; + int recv = 1; - if (nmp->nm_sockflags & NMSOCK_CONNECTING) { - wakeup(&nmp->nm_so); + if (nmp->nm_sockflags & NMSOCK_CONNECTING) return; - } /* make sure we're on the current socket */ - if (nmp->nm_so != so) - return; - lck_mtx_lock(&nmp->nm_lock); - if (nmp->nm_sockflags & NMSOCK_UPCALL) { - /* upcall is already receiving data - just return */ + nso = nmp->nm_nso; + if (!nso || (nso->nso_so != so) || (nmp->nm_sockflags & (NMSOCK_DISCONNECTING))) { lck_mtx_unlock(&nmp->nm_lock); return; } - nmp->nm_sockflags |= NMSOCK_UPCALL; - -nextfrag: - recv = 0; - - /* read the TCP RPC record marker */ - while (!error && nmp->nm_markerleft) { - aio.iov_base = (uintptr_t)((char*)&nmp->nm_fragleft + - sizeof(nmp->nm_fragleft) - nmp->nm_markerleft); - aio.iov_len = nmp->nm_markerleft; - bzero(&msg, sizeof(msg)); - msg.msg_iov = (struct iovec *) &aio; - msg.msg_iovlen = 1; - lck_mtx_unlock(&nmp->nm_lock); - error = sock_receive(so, &msg, MSG_DONTWAIT, &rcvlen); - lck_mtx_lock(&nmp->nm_lock); - if (error || !rcvlen) - break; - recv = 1; - nmp->nm_markerleft -= rcvlen; - if (nmp->nm_markerleft) - continue; - /* record marker complete */ - nmp->nm_fragleft = ntohl(nmp->nm_fragleft); - if (nmp->nm_fragleft & 0x80000000) { - nmp->nm_sockflags |= NMSOCK_LASTFRAG; - nmp->nm_fragleft &= ~0x80000000; - } - nmp->nm_reclen += nmp->nm_fragleft; - if (nmp->nm_reclen > NFS_MAXPACKET) { - /* - * This is SERIOUS! We are out of sync with the sender - * and forcing a disconnect/reconnect is all I can do. - */ - log(LOG_ERR, "%s (%d) from nfs server %s\n", - "impossible RPC record length", nmp->nm_reclen, - vfs_statfs(nmp->nm_mountp)->f_mntfromname); - error = EFBIG; - } - } + lck_mtx_unlock(&nmp->nm_lock); - /* read the TCP RPC record fragment */ - while (!error && !nmp->nm_markerleft && nmp->nm_fragleft) { - m = NULL; - rcvlen = nmp->nm_fragleft; - lck_mtx_unlock(&nmp->nm_lock); - error = sock_receivembuf(so, NULL, &m, MSG_DONTWAIT, &rcvlen); - lck_mtx_lock(&nmp->nm_lock); - if (error || !rcvlen || !m) - break; - recv = 1; - /* append mbufs to list */ - nmp->nm_fragleft -= rcvlen; - if (!nmp->nm_m) { - nmp->nm_m = m; - } else { - error = mbuf_setnext(nmp->nm_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); - nmp->nm_mlast = m; + /* 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; } - - /* done reading fragment? */ - m = NULL; - if (!error && !nmp->nm_markerleft && !nmp->nm_fragleft) { - /* reset socket fragment parsing state */ - nmp->nm_markerleft = sizeof(nmp->nm_fragleft); - if (nmp->nm_sockflags & NMSOCK_LASTFRAG) { - /* RPC record complete */ - m = nmp->nm_m; - /* reset socket record parsing state */ - nmp->nm_reclen = 0; - nmp->nm_m = nmp->nm_mlast = NULL; - nmp->nm_sockflags &= ~NMSOCK_LASTFRAG; - } + 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); } - if (m) { /* match completed response with request */ + lck_mtx_lock(&nmp->nm_lock); + if (nmp->nm_nso == nso) { + /* still the same socket, so update socket's RPC parsing state */ + lck_mtx_unlock(&nmp->nm_lock); + lck_mtx_lock(&nso->nso_lock); + nso->nso_rrs = nrrs; + nso->nso_flags &= ~NSO_UPCALL; + lck_mtx_unlock(&nso->nso_lock); + if (nmp->nm_sockflags & NMSOCK_DISCONNECTING) + wakeup(&nmp->nm_sockflags); + } else { lck_mtx_unlock(&nmp->nm_lock); - nfs_request_match_reply(nmp, m); - lck_mtx_lock(&nmp->nm_lock); } - - /* loop if we've been making error-free progress */ - if (!error && recv) - goto nextfrag; - - nmp->nm_sockflags &= ~NMSOCK_UPCALL; - lck_mtx_unlock(&nmp->nm_lock); #ifdef NFS_SOCKET_DEBUGGING if (!recv && (error != EWOULDBLOCK)) - NFS_SOCK_DBG(("nfs_tcp_rcv: got nothing, error %d, got FIN?\n", error)); + 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_SOCK_DBG("nfs_tcp_rcv: need reconnect %d\n", error); nfs_need_reconnect(nmp); } } @@ -1138,49 +3323,50 @@ nextfrag: /* * "poke" a socket to try to provoke any pending errors */ -static void +void nfs_sock_poke(struct nfsmount *nmp) { - struct iovec_32 aio; + 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_so) { + if ((nmp->nm_sockflags & NMSOCK_UNMOUNT) || + !(nmp->nm_sockflags & NMSOCK_READY) || !nmp->nm_nso || !nmp->nm_nso->nso_so) { lck_mtx_unlock(&nmp->nm_lock); return; } lck_mtx_unlock(&nmp->nm_lock); - aio.iov_base = (uintptr_t)&dummy; + aio.iov_base = &dummy; aio.iov_len = 0; len = 0; bzero(&msg, sizeof(msg)); - msg.msg_iov = (struct iovec *) &aio; + msg.msg_iov = &aio; msg.msg_iovlen = 1; - error = sock_send(nmp->nm_so, &msg, MSG_DONTWAIT, &len); - NFS_SOCK_DBG(("nfs_sock_poke: error %d\n", error)); + error = sock_send(nmp->nm_nso->nso_so, &msg, MSG_DONTWAIT, &len); + NFS_SOCK_DBG("nfs_sock_poke: error %d\n", error); + nfs_is_dead(error, nmp); } /* * Match an RPC reply with the corresponding request */ -static void +void nfs_request_match_reply(struct nfsmount *nmp, mbuf_t mrep) { struct nfsreq *req; struct nfsm_chain nmrep; - u_long reply = 0, rxid = 0; - long t1; - int error = 0, asyncioq, asyncgss; + 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)) { - OSAddAtomic(1, (SInt32*)&nfsstats.rpcinvalid); + OSAddAtomic64(1, &nfsstats.rpcinvalid); mbuf_freem(mrep); return; } @@ -1255,14 +3441,10 @@ nfs_request_match_reply(struct nfsmount *nmp, mbuf_t mrep) /* signal anyone waiting on this request */ wakeup(req); asyncioq = (req->r_callback.rcb_func != NULL); - if ((asyncgss = ((req->r_gss_ctx != NULL) && ((req->r_flags & (R_ASYNC|R_ASYNCWAIT|R_ALLOCATED)) == (R_ASYNC|R_ALLOCATED))))) - nfs_request_ref(req, 1); + if (nfs_request_using_gss(req)) + nfs_gss_clnt_rpcdone(req); lck_mtx_unlock(&req->r_mtx); lck_mtx_unlock(nfs_request_mutex); - if (asyncgss) { - nfs_gss_clnt_rpcdone(req); - nfs_request_rele(req); - } /* if it's an async RPC with a callback, queue it up */ if (asyncioq) nfs_asyncio_finish(req); @@ -1272,7 +3454,7 @@ nfs_request_match_reply(struct nfsmount *nmp, mbuf_t mrep) if (!req) { /* not matched to a request, so drop it. */ lck_mtx_unlock(nfs_request_mutex); - OSAddAtomic(1, (SInt32*)&nfsstats.rpcunexpected); + OSAddAtomic64(1, &nfsstats.rpcunexpected); mbuf_freem(mrep); } } @@ -1281,42 +3463,45 @@ nfs_request_match_reply(struct nfsmount *nmp, mbuf_t mrep) * Wait for the reply for a given request... * ...potentially resending the request if necessary. */ -static int +int nfs_wait_reply(struct nfsreq *req) { - struct nfsmount *nmp = req->r_nmp; - struct timespec ts = { 30, 0 }; - int error = 0, slpflag; + struct timespec ts = { 2, 0 }; + int error = 0, slpflag, first = 1; - if ((nmp->nm_flag & NFSMNT_INT) && req->r_thread) + 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(nmp, req, req->r_thread, 0))) + 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)); + 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 (req->r_gss_ctx) { + if (nfs_request_using_gss(req)) { /* - * It's an RPCSEC_GSS mount. + * 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)); + 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) @@ -1326,7 +3511,7 @@ nfs_wait_reply(struct nfsreq *req) if (nfs_noremotehang(req->r_thread)) ts.tv_sec = 1; msleep(req, &req->r_mtx, slpflag | (PZERO - 1), "nfswaitreply", &ts); - slpflag = 0; + first = slpflag = 0; } lck_mtx_unlock(&req->r_mtx); @@ -1405,7 +3590,7 @@ nfs_request_create( } if ((nmp->nm_vers != NFS_VER4) && (procnum >= 0) && (procnum < NFS_NPROCS)) - OSAddAtomic(1, (SInt32*)&nfsstats.rpccnt[procnum]); + 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); @@ -1413,6 +3598,8 @@ nfs_request_create( req->r_nmp = nmp; 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; @@ -1426,6 +3613,14 @@ nfs_request_create( 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 */ @@ -1448,6 +3643,7 @@ nfs_request_destroy(struct nfsreq *req) struct nfsmount *nmp = req->r_np ? NFSTONMP(req->r_np) : req->r_nmp; struct gss_seq *gsp, *ngsp; struct timespec ts = { 1, 0 }; + int clearjbtimeo = 0; if (!req || !(req->r_flags & R_INITTED)) return; @@ -1463,23 +3659,43 @@ nfs_request_destroy(struct nfsreq *req) } 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); + } + } if (req->r_rchain.tqe_next != NFSREQNOLIST) { TAILQ_REMOVE(&nmp->nm_resendq, req, r_rchain); req->r_rchain.tqe_next = NFSREQNOLIST; - req->r_flags &= ~R_RESENDQ; + 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_lock(&req->r_mtx); while (req->r_flags & R_RESENDQ) msleep(req, &req->r_mtx, (PZERO - 1), "nfsresendqwait", &ts); 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) @@ -1488,12 +3704,14 @@ nfs_request_destroy(struct nfsreq *req) mbuf_freem(req->r_nmrep.nmc_mhead); if (IS_VALID_CRED(req->r_cred)) kauth_cred_unref(&req->r_cred); - if (req->r_gss_ctx) + 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); lck_mtx_destroy(&req->r_mtx, nfs_request_grp); if (req->r_flags & R_ALLOCATED) @@ -1535,7 +3753,7 @@ int nfs_request_add_header(struct nfsreq *req) { struct nfsmount *nmp; - int error = 0, auth_len = 0; + int error = 0; mbuf_t m; /* free up any previous header */ @@ -1549,24 +3767,7 @@ nfs_request_add_header(struct nfsreq *req) if (!nmp) return (ENXIO); - if (!req->r_cred) /* RPCAUTH_NULL */ - auth_len = 0; - else switch (nmp->nm_auth) { - case RPCAUTH_UNIX: - if (req->r_cred->cr_ngroups < 1) - return (EINVAL); - auth_len = ((((req->r_cred->cr_ngroups - 1) > nmp->nm_numgrps) ? - nmp->nm_numgrps : (req->r_cred->cr_ngroups - 1)) << 2) + - 5 * NFSX_UNSIGNED; - break; - case RPCAUTH_KRB5: - case RPCAUTH_KRB5I: - case RPCAUTH_KRB5P: - auth_len = 5 * NFSX_UNSIGNED + 0; // zero context handle for now - break; - } - - error = nfsm_rpchead(req, auth_len, req->r_mrest, &req->r_xid, &req->r_mhead); + error = nfsm_rpchead(req, req->r_mrest, &req->r_xid, &req->r_mhead); if (error) return (error); @@ -1575,7 +3776,7 @@ nfs_request_add_header(struct nfsreq *req) if (!nmp) return (ENXIO); lck_mtx_lock(&nmp->nm_lock); - if (nmp->nm_flag & NFSMNT_SOFT) + if (NMFLAG(nmp, SOFT)) req->r_retry = nmp->nm_retry; else req->r_retry = NFS_MAXREXMIT + 1; /* past clip limit */ @@ -1594,6 +3795,10 @@ 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_np ? NFSTONMP(req->r_np) : req->r_nmp; @@ -1609,7 +3814,7 @@ nfs_request_send(struct nfsreq *req, int wait) ((nmp->nm_tprintf_delay) - (nmp->nm_tprintf_initial_delay)); } - OSAddAtomic(1, (SInt32*)&nfsstats.rpcrequests); + OSAddAtomic64(1, &nfsstats.rpcrequests); /* * Chain request into list of outstanding requests. Be sure @@ -1658,7 +3863,7 @@ nfs_request_finish( uint32_t auth_status = 0; uint32_t accepted_status = 0; struct nfsm_chain nmrep; - int error, auth; + int error, clearjbtimeo; error = req->r_error; @@ -1672,10 +3877,10 @@ nfs_request_finish( nmp = req->r_np ? NFSTONMP(req->r_np) : req->r_nmp; - /* - * Decrement the outstanding request count. - */ - if (req->r_flags & R_CWND) { + if ((req->r_flags & R_CWND) && nmp) { + /* + * 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); @@ -1690,9 +3895,9 @@ nfs_request_finish( lck_mtx_unlock(&nmp->nm_lock); } - if (req->r_gss_ctx) { // Using gss cred ? + if (nfs_request_using_gss(req)) { /* - * If the request had an RPCSEC_GSS credential + * If the request used an RPCSEC_GSS credential * then reset its sequence number bit in the * request window. */ @@ -1725,7 +3930,7 @@ nfs_request_finish( */ if (!error) { if ((req->r_flags & R_TPRINTFMSG) || - (nmp && (nmp->nm_flag & NFSMNT_SOFT) && + (nmp && NMFLAG(nmp, SOFT) && ((nmp->nm_state & (NFSSTA_TIMEO|NFSSTA_FORCE)) == NFSSTA_TIMEO))) nfs_up(nmp, req->r_thread, NFSSTA_TIMEO, "is alive again"); else @@ -1762,7 +3967,7 @@ nfs_request_finish( error = nfs_gss_clnt_args_restore(req); if (error && error != ENEEDAUTH) break; - + if (!error) { error = nfs_gss_clnt_ctx_renew(req); if (error) @@ -1785,11 +3990,10 @@ nfs_request_finish( nfsm_chain_get_32(error, &nmrep, verf_len); // verifier length nfsmout_if(error); - auth = !req->r_cred ? RPCAUTH_NULL : nmp->nm_auth; - switch (auth) { - case RPCAUTH_NULL: - case RPCAUTH_UNIX: - /* Any AUTH_UNIX verifier is ignored */ + 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); @@ -1820,14 +4024,14 @@ nfs_request_finish( /* * It's a JUKEBOX error - delay and try again */ - int delay, slpflag = (nmp->nm_flag & NFSMNT_INT) ? PCATCH : 0; + 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 */ - OSAddAtomic(1, (SInt32*)&nfsstats.rpctimeouts); + OSAddAtomic64(1, &nfsstats.rpctimeouts); nfs_softterm(req); error = req->r_error; goto nfsmout; @@ -1835,10 +4039,22 @@ nfs_request_finish( 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 == 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); + } nfs_down(req->r_nmp, req->r_thread, 0, NFSSTA_JUKEBOXTIMEO, "resource temporarily unavailable (jukebox)"); - req->r_flags |= R_JBTPRINTFMSG; + } + if (NMFLAG(nmp, 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) { @@ -1848,8 +4064,9 @@ nfs_request_finish( } else { do { if ((error = nfs_sigintr(req->r_nmp, req, req->r_thread, 0))) - return (error); - tsleep(&lbolt, PSOCK|slpflag, "nfs_jukebox_trylater", 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 @@ -1859,8 +4076,104 @@ nfs_request_finish( return (0); } - if (req->r_flags & R_JBTPRINTFMSG) - nfs_up(nmp, req->r_thread, NFSSTA_JUKEBOXTIMEO, "resource available again"); + 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; + } + 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; + } + + /* 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 (((req->r_wrongsec[i] == RPCAUTH_KRB5P) || + (req->r_wrongsec[i] == RPCAUTH_KRB5I) || + (req->r_wrongsec[i] == RPCAUTH_KRB5)) && (req->r_gss_ctx && + (req->r_gss_ctx->gss_clnt_service == RPCSEC_GSS_SVC_SYS))) { + /* don't bother trying Kerberos if we've already got a fallback context */ + req->r_wrongsec[i] = RPCAUTH_INVALID; + continue; + } + 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; + } + 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); + } + 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) { /* @@ -1876,8 +4189,12 @@ nfs_request_finish( * If the File Handle was stale, invalidate the * lookup cache, just in case. */ - if ((*status == ESTALE) && req->r_np) + 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)); + } if (nmp->nm_vers == NFS_VER2) mbuf_freem(mrep); else @@ -1903,13 +4220,36 @@ nfs_request_finish( break; } nfsmout: - if (!error && (req->r_flags & R_JBTPRINTFMSG)) - nfs_up(nmp, req->r_thread, NFSSTA_JUKEBOXTIMEO, NULL); + 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. @@ -1922,13 +4262,14 @@ nfs_request( 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), - 0, nmrepp, xidp, status); + si, 0, nmrepp, xidp, status); } int @@ -1939,6 +4280,7 @@ nfs_request2( int procnum, thread_t thd, kauth_cred_t cred, + struct nfsreq_secinfo_args *si, int flags, struct nfsm_chain *nmrepp, u_int64_t *xidp, @@ -1950,6 +4292,8 @@ nfs_request2( if ((error = nfs_request_create(np, mp, nmrest, procnum, thd, cred, &req))) return (error); req->r_flags |= (flags & R_OPTMASK); + if (si) + req->r_secinfo = *si; FSDBG_TOP(273, R_XID32(req->r_xid), np, procnum, 0); do { @@ -1971,6 +4315,57 @@ nfs_request2( 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; + + 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); + + 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, 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), NULL, NFSPROC_NULL, error); + nfs_request_rele(req); + return (error); +} + /* * Create and start an asynchronous NFS request. */ @@ -1982,10 +4377,13 @@ nfs_request_async( 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); @@ -1993,7 +4391,10 @@ nfs_request_async( 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); @@ -2005,9 +4406,32 @@ nfs_request_async( 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 && (req->r_nmp->nm_flag & NFSMNT_INT) && req->r_thread) ? PCATCH : 0; + 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)) { + if ((req->r_flags & R_RESENDQ) && ((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; + lck_mtx_unlock(&nmp->nm_lock); + req->r_flags |= R_SENDING; + lck_mtx_unlock(&req->r_mtx); + error = nfs_send(req, 1); + 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); @@ -2035,17 +4459,41 @@ nfs_request_async_finish( u_int64_t *xidp, int *status) { - int error, asyncio = req->r_callback.rcb_func ? 1 : 0; + 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 */ - msleep(req, &req->r_mtx, PZERO-1, "nfsresendqwait", NULL); + 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; + 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); - nfs_request_wait(req); - error = nfs_request_finish(req, nmrepp, status); + if (!error) { + nfs_request_wait(req); + error = nfs_request_finish(req, nmrepp, status); + } while (!error && (req->r_flags & R_RESTART)) { if (asyncio && req->r_resendtime) { /* send later */ @@ -2088,7 +4536,7 @@ nfs_request_async_cancel(struct nfsreq *req) /* * Flag a request as being terminated. */ -static void +void nfs_softterm(struct nfsreq *req) { struct nfsmount *nmp = req->r_nmp; @@ -2114,7 +4562,7 @@ nfs_softterm(struct nfsreq *req) /* * Ensure req isn't in use by the timer, then dequeue it. */ -static void +void nfs_reqdequeue(struct nfsreq *req) { lck_mtx_lock(nfs_request_mutex); @@ -2133,7 +4581,7 @@ nfs_reqdequeue(struct nfsreq *req) * Busy (lock) a nfsreq, used by the nfs timer to make sure it's not * free()'d out from under it. */ -static void +void nfs_reqbusy(struct nfsreq *req) { if (req->r_lflags & RL_BUSY) @@ -2144,7 +4592,7 @@ nfs_reqbusy(struct nfsreq *req) /* * Unbusy the nfsreq passed in, return the next nfsreq in the chain busied. */ -static struct nfsreq * +struct nfsreq * nfs_reqnext(struct nfsreq *req) { struct nfsreq * nextreq; @@ -2232,7 +4680,7 @@ nfs_request_timer(__unused void *param0, __unused void *param1) lck_mtx_unlock(&nmp->nm_lock); /* we're not yet completely mounted and */ /* we can't complete an RPC, so we fail */ - OSAddAtomic(1, (SInt32*)&nfsstats.rpctimeouts); + OSAddAtomic64(1, &nfsstats.rpctimeouts); nfs_softterm(req); finish_asyncio = ((req->r_callback.rcb_func != NULL) && !(req->r_flags & R_WAITSENT)); wakeup(req); @@ -2248,9 +4696,10 @@ nfs_request_timer(__unused void *param0, __unused void *param1) * Put a reasonable limit on the maximum timeout, * and reduce that limit when soft mounts get timeouts or are in reconnect. */ - if (!(nmp->nm_flag & NFSMNT_SOFT)) + if (!NMFLAG(nmp, SOFT) && !nfs_can_squish(nmp)) maxtime = NFS_MAXTIMEO; - else if ((req->r_flags & R_SETUP) || ((nmp->nm_reconnect_start <= 0) || ((now.tv_sec - nmp->nm_reconnect_start) < 8))) + 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; @@ -2267,7 +4716,7 @@ nfs_request_timer(__unused void *param0, __unused void *param1) } else { if (req->r_procnum == NFSPROC_NULL && req->r_gss_ctx != NULL) timeo = NFS_MINIDEMTIMEO; // gss context setup - else if (nmp->nm_flag & NFSMNT_DUMBTIMR) + else if (NMFLAG(nmp, DUMBTIMER)) timeo = nmp->nm_timeo; else timeo = NFS_RTO(nmp, proct[req->r_procnum]); @@ -2287,27 +4736,29 @@ nfs_request_timer(__unused void *param0, __unused void *param1) 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", + 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)); + (now.tv_sec - req->r_start)*NFS_HZ, maxtime); if (nmp->nm_timeouts < 8) nmp->nm_timeouts++; + nfs_mount_check_dead_timeout(nmp); /* 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)) { + !(nmp->nm_sockflags & (NMSOCK_POKE|NMSOCK_UNMOUNT)) && + (nmp->nm_sockflags & NMSOCK_READY)) { nmp->nm_sockflags |= NMSOCK_POKE; TAILQ_INSERT_TAIL(&nfs_mount_poke_queue, nmp, nm_pokeq); } lck_mtx_unlock(&nmp->nm_lock); } - /* For soft mounts (& SETUPs), check for too many retransmits/timeout. */ - if (((nmp->nm_flag & NFSMNT_SOFT) || (req->r_flags & R_SETUP)) && + /* For soft mounts (& SETUPs/RECOVERs), check for too many retransmits/timeout. */ + if ((NMFLAG(nmp, SOFT) || (req->r_flags & (R_SETUP|R_RECOVER))) && ((req->r_rexmit >= req->r_retry) || /* too many */ ((now.tv_sec - req->r_start)*NFS_HZ > maxtime))) { /* too long */ - OSAddAtomic(1, (SInt32*)&nfsstats.rpctimeouts); + OSAddAtomic64(1, &nfsstats.rpctimeouts); lck_mtx_lock(&nmp->nm_lock); if (!(nmp->nm_state & NFSSTA_TIMEO)) { lck_mtx_unlock(&nmp->nm_lock); @@ -2320,9 +4771,14 @@ nfs_request_timer(__unused void *param0, __unused void *param1) } else { lck_mtx_unlock(&nmp->nm_lock); } - NFS_SOCK_DBG(("nfs timer TERMINATE: p %d x 0x%llx f 0x%x rtt %d t %ld\n", + 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)); + now.tv_sec - req->r_start); nfs_softterm(req); finish_asyncio = ((req->r_callback.rcb_func != NULL) && !(req->r_flags & R_WAITSENT)); wakeup(req); @@ -2349,168 +4805,730 @@ nfs_request_timer(__unused void *param0, __unused void *param1) lck_mtx_unlock(&req->r_mtx); continue; } - 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_ASYNC|R_ASYNCWAIT)) == R_ASYNC) - nfs_asyncio_resend(req); - lck_mtx_unlock(&req->r_mtx); + 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_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); + lck_mtx_lock(&nmp->nm_lock); + nmp->nm_sockflags &= ~NMSOCK_POKE; + wakeup(&nmp->nm_sockflags); + lck_mtx_unlock(&nmp->nm_lock); + } + + nfs_interval_timer_start(nfs_request_timer_call, NFS_REQUESTDELAY); +} + +/* + * check a thread's proc for the "noremotehang" flag. + */ +int +nfs_noremotehang(thread_t thd) +{ + proc_t p = thd ? get_bsdthreadtask_info(thd) : NULL; + return (p && proc_noremotehang(p)); +} + +/* + * 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 (nmp == NULL) + return (ENXIO); + + 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 (nmp->nm_mountp->mnt_kern_flag & MNTK_FRCUNMOUNT) { + /* Someone is unmounting us, go soft and mark it. */ + NFS_BITMAP_SET(nmp->nm_flags, NFS_MFLAG_SOFT); + nmp->nm_state |= NFSSTA_FORCE; + } + + /* Check if the mount is marked dead. */ + if (!error && (nmp->nm_state & NFSSTA_DEAD)) + error = ENXIO; + + /* + * If the mount is hung and we've requested not to hang + * on remote filesystems, then bail now. + */ + if (current_proc() != kernproc && + !error && (nmp->nm_state & NFSSTA_TIMEO) && nfs_noremotehang(thd)) + error = EIO; + + 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); + + /* + * 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 (((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); + + /* 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); +} + +/* + * 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 }; + + if (nmp == NULL) + return (ENXIO); + + lck_mtx_lock(&nmp->nm_lock); + statep = &nmp->nm_state; + + 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 (!error) + *statep |= NFSSTA_SNDLOCK; + lck_mtx_unlock(&nmp->nm_lock); + return (error); +} + +/* + * Unlock the stream socket for others. + */ +void +nfs_sndunlock(struct nfsreq *req) +{ + struct nfsmount *nmp = req->r_nmp; + int *statep, wake = 0; + + if (nmp == NULL) + 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; + } + lck_mtx_unlock(&nmp->nm_lock); + if (wake) + wakeup(statep); +} + +int +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) +{ + 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 (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); + } + + if (sotype == SOCK_STREAM) { + on = 4; /* don't wait too long for the socket to connect */ + sock_setsockopt(newso, IPPROTO_TCP, TCP_CONNECTIONTIMEOUT, &on, sizeof(on)); + error = sock_connect(newso, saddr, 0); + 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); + } + + 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 { + readlen = 1<<18; + bzero(&msg, sizeof(msg)); + error = sock_receivembuf(so, &msg, &mrep, 0, &readlen); + } + 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 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; + } + break; + } +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)); + } + if (newso) { + sock_shutdown(newso, SHUT_RDWR); + sock_close(newso); + } + mbuf_freem(mreq); + return (error); +} + +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); + +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); +} - 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); - lck_mtx_lock(&nmp->nm_lock); - nmp->nm_sockflags &= ~NMSOCK_POKE; - if (!(nmp->nm_state & NFSSTA_MOUNTED)) - wakeup(&nmp->nm_sockflags); - lck_mtx_unlock(&nmp->nm_lock); - } +int +nfs_msg(thread_t thd, + const char *server, + const char *msg, + int error) +{ + proc_t p = thd ? get_bsdthreadtask_info(thd) : NULL; + tpr_t tpr; - nfs_interval_timer_start(nfs_request_timer_call, NFS_REQUESTDELAY); + 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); } +#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 */ + +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*/ + /* - * check a thread's proc for the "noremotehang" flag. + * Could this mount be squished? */ int -nfs_noremotehang(thread_t thd) +nfs_can_squish(struct nfsmount *nmp) { - proc_t p = thd ? get_bsdthreadtask_info(thd) : NULL; - return (p && proc_noremotehang(p)); + uint64_t flags = vfs_flags(nmp->nm_mountp); + int softsquish = ((nfs_squishy_flags & NFS_SQUISH_SOFT) & NMFLAG(nmp, SOFT)); + + if (!softsquish && (nfs_squishy_flags & NFS_SQUISH_MOBILE_ONLY) && nfs_is_mobile == 0) + return (0); + + if ((nfs_squishy_flags & NFS_SQUISH_AUTOMOUNTED_ONLY) && (flags & MNT_AUTOMOUNTED) == 0) + return (0); + + return (1); } /* - * 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). + * 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. */ + int -nfs_sigintr(struct nfsmount *nmp, struct nfsreq *req, thread_t thd, int nmplocked) +nfs_is_squishy(struct nfsmount *nmp) { - int error = 0; + mount_t mp = nmp->nm_mountp; + int squishy = 0; + int timeo = (nfs_squishy_flags & NFS_SQUISH_QUICK) ? NFS_SQUISHY_QUICKTIMEOUT : NFS_SQUISHY_DEADTIMEOUT; - if (nmp == NULL) - return (ENXIO); + NFS_SOCK_DBG("%s: nm_curdeadtiemout = %d, nfs_is_mobile = %d\n", + vfs_statfs(mp)->f_mntfromname, nmp->nm_curdeadtimeout, nfs_is_mobile); - if (req && (req->r_flags & R_SOFTTERM)) - return (ETIMEDOUT); /* request has been terminated. */ + if (!nfs_can_squish(nmp)) + goto out; - /* - * If we're in the progress of a force unmount and there's - * been a timeout, we're dead and fail IO. - */ - if (!nmplocked) - lck_mtx_lock(&nmp->nm_lock); - if ((nmp->nm_state & NFSSTA_FORCE) && - (nmp->nm_state & (NFSSTA_TIMEO|NFSSTA_JUKEBOXTIMEO|NFSSTA_LOCKTIMEO))) { - error = EIO; - } else if (nmp->nm_mountp->mnt_kern_flag & MNTK_FRCUNMOUNT) { - /* Someone is unmounting us, go soft and mark it. */ - nmp->nm_flag |= NFSMNT_SOFT; - nmp->nm_state |= NFSSTA_FORCE; + 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 (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. + */ + if (!(flags & MNT_RDONLY) && !(nmp->nm_state & NFSSTA_SQUISHY)) + squishy = !nfs_mount_is_dirty(mp); } - /* - * If the mount is hung and we've requested not to hang - * on remote filesystems, then bail now. - */ - if (!error && (nmp->nm_state & NFSSTA_TIMEO) && nfs_noremotehang(thd)) - error = EIO; +out: + if (squishy) + nmp->nm_state |= NFSSTA_SQUISHY; + else + nmp->nm_state &= ~NFSSTA_SQUISHY; - if (!nmplocked) - lck_mtx_unlock(&nmp->nm_lock); - if (error) - return (error); + nmp->nm_curdeadtimeout = squishy ? timeo : nmp->nm_deadtimeout; + + NFS_SOCK_DBG("nm_curdeadtimeout = %d\n", nmp->nm_curdeadtimeout); - /* may not have a thread for async I/O */ - if (thd == NULL) - return (0); + return (squishy); +} - /* If this thread belongs to kernel task; then abort check is not needed */ - if ((current_proc() != kernproc) && current_thread_aborted()) - return (EINTR); +/* + * 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. + */ +static int +nfs_is_dead_lock(int error, struct nfsmount *nmp) +{ + if (nmp->nm_state & NFSSTA_DEAD) + return (1); - /* mask off thread and process blocked signals. */ - if ((nmp->nm_flag & NFSMNT_INT) && - proc_pendingsignals(get_bsdthreadtask_info(thd), NFSINT_SIGMASK)) - return (EINTR); + if ((error != ENETUNREACH && error != EHOSTUNREACH && error != EADDRNOTAVAIL) || + !(nmp->nm_locations.nl_numlocs == 1 && nmp->nm_locations.nl_locations[0]->nl_servcount == 1)) + return (0); + + 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); + nmp->nm_state |= NFSSTA_DEAD; + vfs_event_signal(&vfs_statfs(nmp->nm_mountp)->f_fsid, VQ_DEAD, 0); + return (1); + } 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(struct nfsreq *req) +nfs_is_dead(int error, struct nfsmount *nmp) { - struct nfsmount *nmp = req->r_nmp; - int *statep; - int error = 0, slpflag = 0; - struct timespec ts = { 0, 0 }; + int is_dead; + + lck_mtx_lock(&nmp->nm_lock); + is_dead = nfs_is_dead_lock(error, nmp); + lck_mtx_unlock(&nmp->nm_lock); + + return (is_dead); +} + +void +nfs_down(struct nfsmount *nmp, thread_t thd, int error, int flags, const char *msg) +{ + int timeoutmask, wasunresponsive, unresponsive, softnobrowse; + uint32_t do_vfs_signal; + struct timeval now; if (nmp == NULL) - return (ENXIO); + return; lck_mtx_lock(&nmp->nm_lock); - statep = &nmp->nm_state; - if ((nmp->nm_flag & NFSMNT_INT) && req->r_thread) - 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; + 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) { + 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 " : ""); + nmp->nm_state |= NFSSTA_DEAD; } } - if (!error) - *statep |= NFSSTA_SNDLOCK; lck_mtx_unlock(&nmp->nm_lock); - return (error); + + if (nmp->nm_state & NFSSTA_DEAD) + do_vfs_signal = VQ_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); } -/* - * Unlock the stream socket for others. - */ void -nfs_sndunlock(struct nfsreq *req) +nfs_up(struct nfsmount *nmp, thread_t thd, int flags, const char *msg) { - struct nfsmount *nmp = req->r_nmp; - int *statep, wake = 0; + int timeoutmask, wasunresponsive, unresponsive, softnobrowse; + int do_vfs_signal; if (nmp == NULL) return; + + if (msg) + nfs_msg(thd, vfs_statfs(nmp->nm_mountp)->f_mntfromname, msg, 0); + lck_mtx_lock(&nmp->nm_lock); - statep = &nmp->nm_state; - if ((*statep & NFSSTA_SNDLOCK) == 0) - panic("nfs sndunlock"); - *statep &= ~NFSSTA_SNDLOCK; - if (*statep & NFSSTA_WANTSND) { - *statep &= ~NFSSTA_WANTSND; - wake = 1; - } + + 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 (wake) - wakeup(statep); + + if (softnobrowse) + do_vfs_signal = 0; + else + 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 @@ -2527,7 +5545,7 @@ nfsrv_rephead( size_t siz) { mbuf_t mrep; - u_long *tl; + u_int32_t *tl; struct nfsm_chain nmrep; int err, error; @@ -2623,7 +5641,7 @@ done: *nmrepp = nmrep; if ((err != 0) && (err != NFSERR_RETVOID)) - OSAddAtomic(1, (SInt32*)&nfsstats.srvrpc_errs); + OSAddAtomic64(1, &nfsstats.srvrpc_errs); return (0); } @@ -2672,9 +5690,9 @@ nfsrv_send(struct nfsrv_sock *slp, mbuf_t nam, mbuf_t top) * 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 nfsrv_sock *slp = (struct nfsrv_sock *)arg; + struct nfsrv_sock *slp = arg; if (!nfsd_thread_count || !(slp->ns_flag & SLP_VALID)) return; @@ -2709,10 +5727,10 @@ nfsrv_rcv_locked(socket_t so, struct nfsrv_sock *slp, int waitflag) 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; } @@ -2760,11 +5778,11 @@ nfsrv_rcv_locked(socket_t so, struct nfsrv_sock *slp, int waitflag) 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); @@ -2817,14 +5835,14 @@ dorecs: * stream socket. The "waitflag" argument indicates whether or not it * can sleep. */ -static int +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"); @@ -2864,7 +5882,7 @@ nfsrv_getstream(struct nfsrv_sock *slp, int waitflag) 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); } @@ -2943,7 +5961,7 @@ nfsrv_getstream(struct nfsrv_sock *slp, int waitflag) 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))) @@ -3006,6 +6024,8 @@ nfsrv_dorec( if (error) { if (nam) mbuf_freem(nam); + if (nd->nd_gss_context) + nfs_gss_svc_ctx_deref(nd->nd_gss_context); FREE_ZONE(nd, sizeof(*nd), M_NFSRVDESC); return (error); } @@ -3020,17 +6040,16 @@ nfsrv_dorec( * - verify it * - fill in the cred struct. */ -static int +int nfsrv_getreq(struct nfsrv_descript *nd) { struct nfsm_chain *nmreq; int len, i; - u_long nfsvers, auth_type; + u_int32_t nfsvers, auth_type; int error = 0; uid_t user_id; gid_t group_id; int ngroups; - struct ucred temp_cred; uint32_t val; nd->nd_cr = NULL; @@ -3087,10 +6106,11 @@ nfsrv_getreq(struct nfsrv_descript *nd) nfsmout_if(error); /* Handle authentication */ - if (auth_type == RPCAUTH_UNIX) { + if (auth_type == RPCAUTH_SYS) { + struct posix_cred temp_pcred; if (nd->nd_procnum == NFSPROC_NULL) return (0); - nd->nd_sec = RPCAUTH_UNIX; + 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) @@ -3099,23 +6119,23 @@ nfsrv_getreq(struct nfsrv_descript *nd) nfsmout_if(error); /* create a temporary credential using the bits from the wire */ - bzero(&temp_cred, sizeof(temp_cred)); + bzero(&temp_pcred, sizeof(temp_pcred)); nfsm_chain_get_32(error, nmreq, user_id); nfsm_chain_get_32(error, nmreq, group_id); - temp_cred.cr_groups[0] = 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) - nfsm_chain_get_32(error, nmreq, temp_cred.cr_groups[i]); + 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) - nfsrv_group_sort(&temp_cred.cr_groups[0], ngroups); + 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) @@ -3124,9 +6144,9 @@ nfsrv_getreq(struct nfsrv_descript *nd) nfsm_chain_adv(error, nmreq, nfsm_rndup(len)); /* request creation of a real credential */ - temp_cred.cr_uid = user_id; - temp_cred.cr_ngroups = ngroups; - nd->nd_cr = kauth_cred_create(&temp_cred); + 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; @@ -3189,76 +6209,3 @@ nfsrv_wakenfsd(struct nfsrv_sock *slp) } #endif /* NFSSERVER */ - -static int -nfs_msg(thread_t thd, - const char *server, - const char *msg, - int error) -{ - 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); -} - -void -nfs_down(struct nfsmount *nmp, thread_t thd, int error, int flags, const char *msg) -{ - int ostate; - - if (nmp == NULL) - return; - - lck_mtx_lock(&nmp->nm_lock); - ostate = nmp->nm_state; - if ((flags & NFSSTA_TIMEO) && !(ostate & NFSSTA_TIMEO)) - nmp->nm_state |= NFSSTA_TIMEO; - if ((flags & NFSSTA_LOCKTIMEO) && !(ostate & NFSSTA_LOCKTIMEO)) - nmp->nm_state |= NFSSTA_LOCKTIMEO; - if ((flags & NFSSTA_JUKEBOXTIMEO) && !(ostate & NFSSTA_JUKEBOXTIMEO)) - nmp->nm_state |= NFSSTA_JUKEBOXTIMEO; - lck_mtx_unlock(&nmp->nm_lock); - - if (!(ostate & (NFSSTA_TIMEO|NFSSTA_LOCKTIMEO|NFSSTA_JUKEBOXTIMEO))) - vfs_event_signal(&vfs_statfs(nmp->nm_mountp)->f_fsid, VQ_NOTRESP, 0); - - nfs_msg(thd, vfs_statfs(nmp->nm_mountp)->f_mntfromname, msg, error); -} - -void -nfs_up(struct nfsmount *nmp, thread_t thd, int flags, const char *msg) -{ - int ostate, state; - - if (nmp == NULL) - return; - - if (msg) - nfs_msg(thd, vfs_statfs(nmp->nm_mountp)->f_mntfromname, msg, 0); - - lck_mtx_lock(&nmp->nm_lock); - ostate = nmp->nm_state; - if ((flags & NFSSTA_TIMEO) && (ostate & NFSSTA_TIMEO)) - nmp->nm_state &= ~NFSSTA_TIMEO; - if ((flags & NFSSTA_LOCKTIMEO) && (ostate & NFSSTA_LOCKTIMEO)) - nmp->nm_state &= ~NFSSTA_LOCKTIMEO; - if ((flags & NFSSTA_JUKEBOXTIMEO) && (ostate & NFSSTA_JUKEBOXTIMEO)) - nmp->nm_state &= ~NFSSTA_JUKEBOXTIMEO; - state = nmp->nm_state; - lck_mtx_unlock(&nmp->nm_lock); - - if ((ostate & (NFSSTA_TIMEO|NFSSTA_LOCKTIMEO|NFSSTA_JUKEBOXTIMEO)) && - !(state & (NFSSTA_TIMEO|NFSSTA_LOCKTIMEO|NFSSTA_JUKEBOXTIMEO))) - vfs_event_signal(&vfs_statfs(nmp->nm_mountp)->f_fsid, VQ_NOTRESP, 1); -} -