/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 1998-2015 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
-/* Copyright (c) 1998, 1999 Apple Computer, Inc. All Rights Reserved */
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*
* Copyright (c) 1982, 1986, 1988, 1990, 1993
* SUCH DAMAGE.
*
* @(#)uipc_socket2.c 8.1 (Berkeley) 6/10/93
- * $FreeBSD: src/sys/kern/uipc_socket2.c,v 1.55.2.9 2001/07/26 18:53:02 peter Exp $
+ */
+/*
+ * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
+ * support for mandatory and extensible security protections. This notice
+ * is included in support of clause 2.2 (b) of the Apple Public License,
+ * Version 2.0.
*/
#include <sys/param.h>
#include <sys/kauth.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
+#include <sys/mcache.h>
#include <sys/protosw.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/signalvar.h>
#include <sys/sysctl.h>
+#include <sys/syslog.h>
#include <sys/ev.h>
#include <kern/locks.h>
#include <net/route.h>
+#include <net/content_filter.h>
#include <netinet/in.h>
#include <netinet/in_pcb.h>
#include <sys/kdebug.h>
+#include <libkern/OSAtomic.h>
+
+#if CONFIG_MACF
+#include <security/mac_framework.h>
+#endif
-#define DBG_FNC_SBDROP NETDBG_CODE(DBG_NETSOCK, 4)
-#define DBG_FNC_SBAPPEND NETDBG_CODE(DBG_NETSOCK, 5)
+#include <mach/vm_param.h>
+#if MPTCP
+#include <netinet/mptcp_var.h>
+#endif
+
+#define DBG_FNC_SBDROP NETDBG_CODE(DBG_NETSOCK, 4)
+#define DBG_FNC_SBAPPEND NETDBG_CODE(DBG_NETSOCK, 5)
+
+SYSCTL_DECL(_kern_ipc);
+
+__private_extern__ u_int32_t net_io_policy_throttle_best_effort = 0;
+SYSCTL_INT(_kern_ipc, OID_AUTO, throttle_best_effort,
+ CTLFLAG_RW | CTLFLAG_LOCKED, &net_io_policy_throttle_best_effort, 0, "");
+
+static inline void sbcompress(struct sockbuf *, struct mbuf *, struct mbuf *);
+static struct socket *sonewconn_internal(struct socket *, int);
+static int sbappendaddr_internal(struct sockbuf *, struct sockaddr *,
+ struct mbuf *, struct mbuf *);
+static int sbappendcontrol_internal(struct sockbuf *, struct mbuf *,
+ struct mbuf *);
+static void soevent_ifdenied(struct socket *);
/*
* Primitive routines for operating on sockets and socket buffers
*/
+static int soqlimitcompat = 1;
+static int soqlencomp = 0;
+
+/*
+ * Based on the number of mbuf clusters configured, high_sb_max and sb_max can
+ * get scaled up or down to suit that memory configuration. high_sb_max is a
+ * higher limit on sb_max that is checked when sb_max gets set through sysctl.
+ */
-u_long sb_max = SB_MAX; /* XXX should be static */
+u_int32_t sb_max = SB_MAX; /* XXX should be static */
+u_int32_t high_sb_max = SB_MAX;
-static u_long sb_efficiency = 8; /* parameter for sbreserve() */
+static u_int32_t sb_efficiency = 8; /* parameter for sbreserve() */
+int32_t total_sbmb_cnt __attribute__((aligned(8))) = 0;
+int32_t total_sbmb_cnt_peak __attribute__((aligned(8))) = 0;
+int32_t total_snd_byte_count __attribute__((aligned(8))) = 0;
+int64_t sbmb_limreached __attribute__((aligned(8))) = 0;
+
+/* Control whether to throttle sockets eligible to be throttled */
+__private_extern__ u_int32_t net_io_policy_throttled = 0;
+static int sysctl_io_policy_throttled SYSCTL_HANDLER_ARGS;
+
+u_int32_t net_io_policy_log = 0; /* log socket policy changes */
+#if CONFIG_PROC_UUID_POLICY
+u_int32_t net_io_policy_uuid = 1; /* enable UUID socket policy */
+#endif /* CONFIG_PROC_UUID_POLICY */
/*
* Procedures to manipulate state flags of socket
* cause software-interrupt process scheduling.
*/
void
-soisconnecting(so)
- register struct socket *so;
+soisconnecting(struct socket *so)
{
so->so_state &= ~(SS_ISCONNECTED|SS_ISDISCONNECTING);
so->so_state |= SS_ISCONNECTING;
-
+
sflt_notify(so, sock_evt_connecting, NULL);
}
void
-soisconnected(so)
- struct socket *so;
+soisconnected(struct socket *so)
{
struct socket *head = so->so_head;
so->so_state &= ~(SS_ISCONNECTING|SS_ISDISCONNECTING|SS_ISCONFIRMING);
so->so_state |= SS_ISCONNECTED;
-
+
+ soreserve_preconnect(so, 0);
+
sflt_notify(so, sock_evt_connected, NULL);
-
+
if (head && (so->so_state & SS_INCOMP)) {
- if (head->so_proto->pr_getlock != NULL)
+ so->so_state &= ~SS_INCOMP;
+ so->so_state |= SS_COMP;
+ if (head->so_proto->pr_getlock != NULL) {
+ socket_unlock(so, 0);
socket_lock(head, 1);
+ }
postevent(head, 0, EV_RCONN);
TAILQ_REMOVE(&head->so_incomp, so, so_list);
head->so_incqlen--;
- so->so_state &= ~SS_INCOMP;
TAILQ_INSERT_TAIL(&head->so_comp, so, so_list);
- so->so_state |= SS_COMP;
sorwakeup(head);
wakeup_one((caddr_t)&head->so_timeo);
- if (head->so_proto->pr_getlock != NULL)
+ if (head->so_proto->pr_getlock != NULL) {
socket_unlock(head, 1);
+ socket_lock(so, 0);
+ }
} else {
postevent(so, 0, EV_WCONN);
wakeup((caddr_t)&so->so_timeo);
sorwakeup(so);
sowwakeup(so);
+ soevent(so, SO_FILT_HINT_LOCKED | SO_FILT_HINT_CONNECTED |
+ SO_FILT_HINT_CONNINFO_UPDATED);
}
}
+boolean_t
+socanwrite(struct socket *so)
+{
+ return ((so->so_state & SS_ISCONNECTED) ||
+ !(so->so_proto->pr_flags & PR_CONNREQUIRED) ||
+ (so->so_flags1 & SOF1_PRECONNECT_DATA));
+
+}
+
void
-soisdisconnecting(so)
- register struct socket *so;
+soisdisconnecting(struct socket *so)
{
so->so_state &= ~SS_ISCONNECTING;
so->so_state |= (SS_ISDISCONNECTING|SS_CANTRCVMORE|SS_CANTSENDMORE);
+ soevent(so, SO_FILT_HINT_LOCKED);
sflt_notify(so, sock_evt_disconnecting, NULL);
wakeup((caddr_t)&so->so_timeo);
sowwakeup(so);
}
void
-soisdisconnected(so)
- register struct socket *so;
+soisdisconnected(struct socket *so)
{
so->so_state &= ~(SS_ISCONNECTING|SS_ISCONNECTED|SS_ISDISCONNECTING);
so->so_state |= (SS_CANTRCVMORE|SS_CANTSENDMORE|SS_ISDISCONNECTED);
+ soevent(so, SO_FILT_HINT_LOCKED | SO_FILT_HINT_DISCONNECTED |
+ SO_FILT_HINT_CONNINFO_UPDATED);
sflt_notify(so, sock_evt_disconnected, NULL);
wakeup((caddr_t)&so->so_timeo);
sowwakeup(so);
sorwakeup(so);
+
+#if CONTENT_FILTER
+ /* Notify content filters as soon as we cannot send/receive data */
+ cfil_sock_notify_shutdown(so, SHUT_RDWR);
+#endif /* CONTENT_FILTER */
}
/*
- * Return a random connection that hasn't been serviced yet and
- * is eligible for discard. There is a one in qlen chance that
- * we will return a null, saying that there are no dropable
- * requests. In this case, the protocol specific code should drop
- * the new request. This insures fairness.
- *
- * This may be used in conjunction with protocol specific queue
- * congestion routines.
+ * This function will issue a wakeup like soisdisconnected but it will not
+ * notify the socket filters. This will avoid unlocking the socket
+ * in the midst of closing it.
*/
-struct socket *
-sodropablereq(head)
- register struct socket *head;
+void
+sodisconnectwakeup(struct socket *so)
{
- struct socket *so, *sonext = NULL;
- unsigned int i, j, qlen;
- static int rnd;
- static struct timeval old_runtime;
- static unsigned int cur_cnt, old_cnt;
- struct timeval tv;
-
- microtime(&tv);
- if ((i = (tv.tv_sec - old_runtime.tv_sec)) != 0) {
- old_runtime = tv;
- old_cnt = cur_cnt / i;
- cur_cnt = 0;
- }
-
- so = TAILQ_FIRST(&head->so_incomp);
- if (!so)
- return (NULL);
-
- qlen = head->so_incqlen;
- if (++cur_cnt > qlen || old_cnt > qlen) {
- rnd = (314159 * rnd + 66329) & 0xffff;
- j = ((qlen + 1) * rnd) >> 16;
-//###LD To clean up
- while (j-- && so) {
-// if (in_pcb_checkstate(so->so_pcb, WNT_ACQUIRE, 0) != WNT_STOPUSING) {
- socket_lock(so, 1);
- sonext = TAILQ_NEXT(so, so_list);
-// in_pcb_check_state(so->so_pcb, WNT_RELEASE, 0);
- socket_unlock(so, 1);
- so = sonext;
- }
- }
+ so->so_state &= ~(SS_ISCONNECTING|SS_ISCONNECTED|SS_ISDISCONNECTING);
+ so->so_state |= (SS_CANTRCVMORE|SS_CANTSENDMORE|SS_ISDISCONNECTED);
+ soevent(so, SO_FILT_HINT_LOCKED | SO_FILT_HINT_DISCONNECTED |
+ SO_FILT_HINT_CONNINFO_UPDATED);
+ wakeup((caddr_t)&so->so_timeo);
+ sowwakeup(so);
+ sorwakeup(so);
-// if (in_pcb_checkstate(so->so_pcb, WNT_ACQUIRE, 0) == WNT_STOPUSING)
-// return (NULL);
-// else
- return (so);
+#if CONTENT_FILTER
+ /* Notify content filters as soon as we cannot send/receive data */
+ cfil_sock_notify_shutdown(so, SHUT_RDWR);
+#endif /* CONTENT_FILTER */
}
/*
* Connstatus may be 0, or SO_ISCONFIRMING, or SO_ISCONNECTED.
*/
static struct socket *
-sonewconn_internal(head, connstatus)
- register struct socket *head;
- int connstatus;
+sonewconn_internal(struct socket *head, int connstatus)
{
- int error = 0;
- register struct socket *so;
+ int so_qlen, error = 0;
+ struct socket *so;
lck_mtx_t *mutex_held;
- if (head->so_proto->pr_getlock != NULL)
+ if (head->so_proto->pr_getlock != NULL)
mutex_held = (*head->so_proto->pr_getlock)(head, 0);
- else
+ else
mutex_held = head->so_proto->pr_domain->dom_mtx;
lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED);
- if (head->so_qlen > 3 * head->so_qlimit / 2)
+ if (!soqlencomp) {
+ /*
+ * This is the default case; so_qlen represents the
+ * sum of both incomplete and completed queues.
+ */
+ so_qlen = head->so_qlen;
+ } else {
+ /*
+ * When kern.ipc.soqlencomp is set to 1, so_qlen
+ * represents only the completed queue. Since we
+ * cannot let the incomplete queue goes unbounded
+ * (in case of SYN flood), we cap the incomplete
+ * queue length to at most somaxconn, and use that
+ * as so_qlen so that we fail immediately below.
+ */
+ so_qlen = head->so_qlen - head->so_incqlen;
+ if (head->so_incqlen > somaxconn)
+ so_qlen = somaxconn;
+ }
+
+ if (so_qlen >=
+ (soqlimitcompat ? head->so_qlimit : (3 * head->so_qlimit / 2)))
return ((struct socket *)0);
- so = soalloc(1, head->so_proto->pr_domain->dom_family, head->so_type);
+ so = soalloc(1, SOCK_DOM(head), head->so_type);
if (so == NULL)
return ((struct socket *)0);
/* check if head was closed during the soalloc */
if (head->so_proto == NULL) {
- sodealloc(so);
- return ((struct socket *)0);
+ sodealloc(so);
+ return ((struct socket *)0);
}
- so->so_head = head;
so->so_type = head->so_type;
so->so_options = head->so_options &~ SO_ACCEPTCONN;
so->so_linger = head->so_linger;
so->so_proto = head->so_proto;
so->so_timeo = head->so_timeo;
so->so_pgid = head->so_pgid;
- so->so_uid = head->so_uid;
+ kauth_cred_ref(head->so_cred);
+ so->so_cred = head->so_cred;
+ so->last_pid = head->last_pid;
+ so->last_upid = head->last_upid;
+ memcpy(so->last_uuid, head->last_uuid, sizeof (so->last_uuid));
+ if (head->so_flags & SOF_DELEGATED) {
+ so->e_pid = head->e_pid;
+ so->e_upid = head->e_upid;
+ memcpy(so->e_uuid, head->e_uuid, sizeof (so->e_uuid));
+ }
+ /* inherit socket options stored in so_flags */
+ so->so_flags = head->so_flags &
+ (SOF_NOSIGPIPE | SOF_NOADDRAVAIL | SOF_REUSESHAREUID |
+ SOF_NOTIFYCONFLICT | SOF_BINDRANDOMPORT | SOF_NPX_SETOPTSHUT |
+ SOF_NODEFUNCT | SOF_PRIVILEGED_TRAFFIC_CLASS| SOF_NOTSENT_LOWAT |
+ SOF_USELRO | SOF_DELEGATED);
so->so_usecount = 1;
+ so->next_lock_lr = 0;
+ so->next_unlock_lr = 0;
+
+ so->so_rcv.sb_flags |= SB_RECV; /* XXX */
+ so->so_rcv.sb_so = so->so_snd.sb_so = so;
+ TAILQ_INIT(&so->so_evlist);
+
+#if CONFIG_MACF_SOCKET
+ mac_socket_label_associate_accept(head, so);
+#endif
+
+ /* inherit traffic management properties of listener */
+ so->so_traffic_mgt_flags =
+ head->so_traffic_mgt_flags & (TRAFFIC_MGT_SO_BACKGROUND);
+ so->so_background_thread = head->so_background_thread;
+ so->so_traffic_class = head->so_traffic_class;
if (soreserve(so, head->so_snd.sb_hiwat, head->so_rcv.sb_hiwat)) {
- sflt_termsock(so);
sodealloc(so);
return ((struct socket *)0);
}
+ so->so_rcv.sb_flags |= (head->so_rcv.sb_flags & SB_USRSIZE);
+ so->so_snd.sb_flags |= (head->so_snd.sb_flags & SB_USRSIZE);
/*
- * Must be done with head unlocked to avoid deadlock with pcb list
+ * Must be done with head unlocked to avoid deadlock
+ * for protocol with per socket mutexes.
*/
- socket_unlock(head, 0);
- if (((*so->so_proto->pr_usrreqs->pru_attach)(so, 0, NULL) != 0) || error) {
- sflt_termsock(so);
+ if (head->so_proto->pr_unlock)
+ socket_unlock(head, 0);
+ if (((*so->so_proto->pr_usrreqs->pru_attach)(so, 0, NULL) != 0) ||
+ error) {
sodealloc(so);
- socket_lock(head, 0);
+ if (head->so_proto->pr_unlock)
+ socket_lock(head, 0);
return ((struct socket *)0);
}
- socket_lock(head, 0);
-#ifdef __APPLE__
- so->so_proto->pr_domain->dom_refs++;
-#endif
+ if (head->so_proto->pr_unlock) {
+ socket_lock(head, 0);
+ /*
+ * Radar 7385998 Recheck that the head is still accepting
+ * to avoid race condition when head is getting closed.
+ */
+ if ((head->so_options & SO_ACCEPTCONN) == 0) {
+ so->so_state &= ~SS_NOFDREF;
+ soclose(so);
+ return ((struct socket *)0);
+ }
+ }
+
+ atomic_add_32(&so->so_proto->pr_domain->dom_refs, 1);
+
+ /* Insert in head appropriate lists */
+ so->so_head = head;
+
+ /*
+ * Since this socket is going to be inserted into the incomp
+ * queue, it can be picked up by another thread in
+ * tcp_dropdropablreq to get dropped before it is setup..
+ * To prevent this race, set in-progress flag which can be
+ * cleared later
+ */
+ so->so_flags |= SOF_INCOMP_INPROGRESS;
if (connstatus) {
TAILQ_INSERT_TAIL(&head->so_comp, so, so_list);
head->so_incqlen++;
}
head->so_qlen++;
-#ifdef __APPLE__
- so->so_rcv.sb_so = so->so_snd.sb_so = so;
- TAILQ_INIT(&so->so_evlist);
- /* Attach socket filters for this protocol */
- sflt_initsock(so);
-#endif
+ /* Attach socket filters for this protocol */
+ sflt_initsock(so);
+
if (connstatus) {
so->so_state |= connstatus;
sorwakeup(head);
struct socket *
-sonewconn(
- struct socket *head,
- int connstatus,
- const struct sockaddr *from)
+sonewconn(struct socket *head, int connstatus, const struct sockaddr *from)
{
- int error = 0;
- struct socket_filter_entry *filter;
- int filtered = 0;
-
- error = 0;
- for (filter = head->so_filt; filter && (error == 0);
- filter = filter->sfe_next_onsocket) {
- if (filter->sfe_filter->sf_filter.sf_connect_in) {
- if (filtered == 0) {
- filtered = 1;
- sflt_use(head);
- socket_unlock(head, 0);
- }
- error = filter->sfe_filter->sf_filter.sf_connect_in(
- filter->sfe_cookie, head, from);
- }
- }
- if (filtered != 0) {
- socket_lock(head, 0);
- sflt_unuse(head);
- }
-
+ int error = sflt_connectin(head, from);
if (error) {
- return NULL;
+ return (NULL);
}
-
- return sonewconn_internal(head, connstatus);
+
+ return (sonewconn_internal(head, connstatus));
}
/*
*/
void
-socantsendmore(so)
- struct socket *so;
+socantsendmore(struct socket *so)
{
so->so_state |= SS_CANTSENDMORE;
+ soevent(so, SO_FILT_HINT_LOCKED | SO_FILT_HINT_CANTSENDMORE);
sflt_notify(so, sock_evt_cantsendmore, NULL);
sowwakeup(so);
}
void
-socantrcvmore(so)
- struct socket *so;
+socantrcvmore(struct socket *so)
{
so->so_state |= SS_CANTRCVMORE;
+ soevent(so, SO_FILT_HINT_LOCKED | SO_FILT_HINT_CANTRCVMORE);
sflt_notify(so, sock_evt_cantrecvmore, NULL);
sorwakeup(so);
}
* Wait for data to arrive at/drain from a socket buffer.
*/
int
-sbwait(sb)
- struct sockbuf *sb;
+sbwait(struct sockbuf *sb)
{
- int error = 0, lr, lr_saved;
+ boolean_t nointr = (sb->sb_flags & SB_NOINTR);
+ void *lr_saved = __builtin_return_address(0);
struct socket *so = sb->sb_so;
lck_mtx_t *mutex_held;
struct timespec ts;
+ int error = 0;
-#ifdef __ppc__
- __asm__ volatile("mflr %0" : "=r" (lr));
- lr_saved = lr;
-#endif
-
+ if (so == NULL) {
+ panic("%s: null so, sb=%p sb_flags=0x%x lr=%p\n",
+ __func__, sb, sb->sb_flags, lr_saved);
+ /* NOTREACHED */
+ } else if (so->so_usecount < 1) {
+ panic("%s: sb=%p sb_flags=0x%x sb_so=%p usecount=%d lr=%p "
+ "lrh= %s\n", __func__, sb, sb->sb_flags, so,
+ so->so_usecount, lr_saved, solockhistory_nr(so));
+ /* NOTREACHED */
+ }
- if (so->so_proto->pr_getlock != NULL)
+ if (so->so_proto->pr_getlock != NULL)
mutex_held = (*so->so_proto->pr_getlock)(so, 0);
- else
+ else
mutex_held = so->so_proto->pr_domain->dom_mtx;
- sb->sb_flags |= SB_WAIT;
+ lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED);
- if (so->so_usecount < 1)
- panic("sbwait: so=%x refcount=%d\n", so, so->so_usecount);
ts.tv_sec = sb->sb_timeo.tv_sec;
ts.tv_nsec = sb->sb_timeo.tv_usec * 1000;
+
+ sb->sb_waiters++;
+ VERIFY(sb->sb_waiters != 0);
+
error = msleep((caddr_t)&sb->sb_cc, mutex_held,
- (sb->sb_flags & SB_NOINTR) ? PSOCK : PSOCK | PCATCH, "sbwait",
- &ts);
+ nointr ? PSOCK : PSOCK | PCATCH,
+ nointr ? "sbwait_nointr" : "sbwait", &ts);
- lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED);
+ VERIFY(sb->sb_waiters != 0);
+ sb->sb_waiters--;
- if (so->so_usecount < 1)
- panic("sbwait: so=%x refcount=%d\n", so, so->so_usecount);
+ if (so->so_usecount < 1) {
+ panic("%s: 2 sb=%p sb_flags=0x%x sb_so=%p usecount=%d lr=%p "
+ "lrh= %s\n", __func__, sb, sb->sb_flags, so,
+ so->so_usecount, lr_saved, solockhistory_nr(so));
+ /* NOTREACHED */
+ }
- if ((so->so_state & SS_DRAINING)) {
+ if ((so->so_state & SS_DRAINING) || (so->so_flags & SOF_DEFUNCT)) {
error = EBADF;
+ if (so->so_flags & SOF_DEFUNCT) {
+ SODEFUNCTLOG(("%s[%d]: defunct so 0x%llx [%d,%d] "
+ "(%d)\n", __func__, proc_selfpid(),
+ (uint64_t)VM_KERNEL_ADDRPERM(so),
+ SOCK_DOM(so), SOCK_TYPE(so), error));
+ }
}
return (error);
}
-/*
- * Lock a sockbuf already known to be locked;
- * return any error returned from sleep (EINTR).
- */
-int
-sb_lock(sb)
- register struct sockbuf *sb;
+void
+sbwakeup(struct sockbuf *sb)
{
- struct socket *so = sb->sb_so;
- lck_mtx_t * mutex_held;
- int error = 0, lr, lr_saved;
-
-#ifdef __ppc__
- __asm__ volatile("mflr %0" : "=r" (lr));
- lr_saved = lr;
-#endif
-
- if (so == NULL)
- panic("sb_lock: null so back pointer sb=%x\n", sb);
-
- while (sb->sb_flags & SB_LOCK) {
- sb->sb_flags |= SB_WANT;
- if (so->so_proto->pr_getlock != NULL)
- mutex_held = (*so->so_proto->pr_getlock)(so, 0);
- else
- mutex_held = so->so_proto->pr_domain->dom_mtx;
- if (so->so_usecount < 1)
- panic("sb_lock: so=%x refcount=%d\n", so, so->so_usecount);
- error = msleep((caddr_t)&sb->sb_flags, mutex_held,
- (sb->sb_flags & SB_NOINTR) ? PSOCK : PSOCK | PCATCH, "sblock", 0);
- if (so->so_usecount < 1)
- panic("sb_lock: 2 so=%x refcount=%d\n", so, so->so_usecount);
- if (error)
- return (error);
- }
- sb->sb_flags |= SB_LOCK;
- return (0);
+ if (sb->sb_waiters > 0)
+ wakeup((caddr_t)&sb->sb_cc);
}
/*
* if the socket has the SS_ASYNC flag set.
*/
void
-sowakeup(so, sb)
- register struct socket *so;
- register struct sockbuf *sb;
-{
- struct proc *p = current_proc();
+sowakeup(struct socket *so, struct sockbuf *sb)
+{
+ if (so->so_flags & SOF_DEFUNCT) {
+ SODEFUNCTLOG(("%s[%d]: defunct so 0x%llx [%d,%d] si 0x%x, "
+ "fl 0x%x [%s]\n", __func__, proc_selfpid(),
+ (uint64_t)VM_KERNEL_ADDRPERM(so), SOCK_DOM(so),
+ SOCK_TYPE(so), (uint32_t)sb->sb_sel.si_flags, sb->sb_flags,
+ (sb->sb_flags & SB_RECV) ? "rcv" : "snd"));
+ }
+
sb->sb_flags &= ~SB_SEL;
selwakeup(&sb->sb_sel);
- if (sb->sb_flags & SB_WAIT) {
- sb->sb_flags &= ~SB_WAIT;
- wakeup((caddr_t)&sb->sb_cc);
- }
+ sbwakeup(sb);
if (so->so_state & SS_ASYNC) {
if (so->so_pgid < 0)
gsignal(-so->so_pgid, SIGIO);
- else if (so->so_pgid > 0 && (p = pfind(so->so_pgid)) != 0)
- psignal(p, SIGIO);
+ else if (so->so_pgid > 0)
+ proc_signal(so->so_pgid, SIGIO);
}
if (sb->sb_flags & SB_KNOTE) {
KNOTE(&sb->sb_sel.si_note, SO_FILT_HINT_LOCKED);
}
if (sb->sb_flags & SB_UPCALL) {
+ void (*sb_upcall)(struct socket *, void *, int);
+ caddr_t sb_upcallarg;
+
+ sb_upcall = sb->sb_upcall;
+ sb_upcallarg = sb->sb_upcallarg;
+ /* Let close know that we're about to do an upcall */
+ so->so_upcallusecount++;
+
socket_unlock(so, 0);
- (*so->so_upcall)(so, so->so_upcallarg, M_DONTWAIT);
+ (*sb_upcall)(so, sb_upcallarg, M_DONTWAIT);
socket_lock(so, 0);
+
+ so->so_upcallusecount--;
+ /* Tell close that it's safe to proceed */
+ if ((so->so_flags & SOF_CLOSEWAIT) &&
+ so->so_upcallusecount == 0)
+ wakeup((caddr_t)&so->so_upcallusecount);
+ }
+#if CONTENT_FILTER
+ /*
+ * Trap disconnection events for content filters
+ */
+ if ((so->so_flags & SOF_CONTENT_FILTER) != 0) {
+ if ((sb->sb_flags & SB_RECV)) {
+ if (so->so_state & (SS_CANTRCVMORE))
+ cfil_sock_notify_shutdown(so, SHUT_RD);
+ } else {
+ if (so->so_state & (SS_CANTSENDMORE))
+ cfil_sock_notify_shutdown(so, SHUT_WR);
+ }
}
+#endif /* CONTENT_FILTER */
}
/*
* should be released by calling sbrelease() when the socket is destroyed.
*/
+/*
+ * Returns: 0 Success
+ * ENOBUFS
+ */
int
-soreserve(so, sndcc, rcvcc)
- register struct socket *so;
- u_long sndcc, rcvcc;
+soreserve(struct socket *so, u_int32_t sndcc, u_int32_t rcvcc)
{
if (sbreserve(&so->so_snd, sndcc) == 0)
goto bad;
+ else
+ so->so_snd.sb_idealsize = sndcc;
+
if (sbreserve(&so->so_rcv, rcvcc) == 0)
goto bad2;
+ else
+ so->so_rcv.sb_idealsize = rcvcc;
+
if (so->so_rcv.sb_lowat == 0)
so->so_rcv.sb_lowat = 1;
if (so->so_snd.sb_lowat == 0)
so->so_snd.sb_lowat = so->so_snd.sb_hiwat;
return (0);
bad2:
-#ifdef __APPLE__
+ so->so_snd.sb_flags &= ~SB_SEL;
selthreadclear(&so->so_snd.sb_sel);
-#endif
sbrelease(&so->so_snd);
bad:
return (ENOBUFS);
}
+void
+soreserve_preconnect(struct socket *so, unsigned int pre_cc)
+{
+ /* As of now, same bytes for both preconnect read and write */
+ so->so_snd.sb_preconn_hiwat = pre_cc;
+ so->so_rcv.sb_preconn_hiwat = pre_cc;
+}
+
/*
* Allot mbufs to a sockbuf.
* Attempt to scale mbmax so that mbcnt doesn't become limiting
* if buffering efficiency is near the normal case.
*/
int
-sbreserve(sb, cc)
- struct sockbuf *sb;
- u_long cc;
+sbreserve(struct sockbuf *sb, u_int32_t cc)
{
if ((u_quad_t)cc > (u_quad_t)sb_max * MCLBYTES / (MSIZE + MCLBYTES))
return (0);
/*
* Free mbufs held by a socket, and reserved mbuf space.
*/
- /* WARNING needs to do selthreadclear() before calling this */
+/* WARNING needs to do selthreadclear() before calling this */
void
-sbrelease(sb)
- struct sockbuf *sb;
+sbrelease(struct sockbuf *sb)
{
-
sbflush(sb);
sb->sb_hiwat = 0;
sb->sb_mbmax = 0;
-
}
/*
* discarded and mbufs are compacted where possible.
*/
int
-sbappend(sb, m)
- struct sockbuf *sb;
- struct mbuf *m;
+sbappend(struct sockbuf *sb, struct mbuf *m)
{
- register struct mbuf *n, *sb_first;
- int result = 0;
- int error = 0;
- int filtered = 0;
+ struct socket *so = sb->sb_so;
+
+ if (m == NULL || (sb->sb_flags & SB_DROP)) {
+ if (m != NULL)
+ m_freem(m);
+ return (0);
+ }
+ SBLASTRECORDCHK(sb, "sbappend 1");
- KERNEL_DEBUG((DBG_FNC_SBAPPEND | DBG_FUNC_START), sb, m->m_len, 0, 0, 0);
+ if (sb->sb_lastrecord != NULL && (sb->sb_mbtail->m_flags & M_EOR))
+ return (sbappendrecord(sb, m));
- if (m == 0)
- return 0;
-
-again:
- sb_first = n = sb->sb_mb;
- if (n) {
- while (n->m_nextpkt)
- n = n->m_nextpkt;
- do {
- if (n->m_flags & M_EOR) {
- result = sbappendrecord(sb, m); /* XXXXXX!!!! */
- KERNEL_DEBUG((DBG_FNC_SBAPPEND | DBG_FUNC_END), sb, sb->sb_cc, 0, 0, 0);
- return result;
- }
- } while (n->m_next && (n = n->m_next));
- }
-
- if (!filtered && (sb->sb_flags & SB_RECV) != 0) {
- error = sflt_data_in(sb->sb_so, NULL, &m, NULL, 0, &filtered);
- if (error) {
- /* no data was appended, caller should not call sowakeup */
- return 0;
+ if (sb->sb_flags & SB_RECV && !(m && m->m_flags & M_SKIPCFIL)) {
+ int error = sflt_data_in(so, NULL, &m, NULL, 0);
+ SBLASTRECORDCHK(sb, "sbappend 2");
+
+#if CONTENT_FILTER
+ if (error == 0)
+ error = cfil_sock_data_in(so, NULL, m, NULL, 0);
+#endif /* CONTENT_FILTER */
+
+ if (error != 0) {
+ if (error != EJUSTRETURN)
+ m_freem(m);
+ return (0);
}
-
- /*
- If we any filters, the socket lock was dropped. n and sb_first
- cached data from the socket buffer. This cache is not valid
- since we dropped the lock. We must start over. Since filtered
- is set we won't run through the filters a second time. We just
- set n and sb_start again.
- */
- if (filtered)
- goto again;
+ } else if (m) {
+ m->m_flags &= ~M_SKIPCFIL;
+ }
+
+ /* If this is the first record, it's also the last record */
+ if (sb->sb_lastrecord == NULL)
+ sb->sb_lastrecord = m;
+
+ sbcompress(sb, m, sb->sb_mbtail);
+ SBLASTRECORDCHK(sb, "sbappend 3");
+ return (1);
+}
+
+/*
+ * Similar to sbappend, except that this is optimized for stream sockets.
+ */
+int
+sbappendstream(struct sockbuf *sb, struct mbuf *m)
+{
+ struct socket *so = sb->sb_so;
+
+ if (m == NULL || (sb->sb_flags & SB_DROP)) {
+ if (m != NULL)
+ m_freem(m);
+ return (0);
+ }
+
+ if (m->m_nextpkt != NULL || (sb->sb_mb != sb->sb_lastrecord)) {
+ panic("sbappendstream: nexpkt %p || mb %p != lastrecord %p\n",
+ m->m_nextpkt, sb->sb_mb, sb->sb_lastrecord);
+ /* NOTREACHED */
}
- result = sbcompress(sb, m, n);
+ SBLASTMBUFCHK(sb, __func__);
+
+ if (sb->sb_flags & SB_RECV && !(m && m->m_flags & M_SKIPCFIL)) {
+ int error = sflt_data_in(so, NULL, &m, NULL, 0);
+ SBLASTRECORDCHK(sb, "sbappendstream 1");
+
+#if CONTENT_FILTER
+ if (error == 0)
+ error = cfil_sock_data_in(so, NULL, m, NULL, 0);
+#endif /* CONTENT_FILTER */
+
+ if (error != 0) {
+ if (error != EJUSTRETURN)
+ m_freem(m);
+ return (0);
+ }
+ } else if (m) {
+ m->m_flags &= ~M_SKIPCFIL;
+ }
- KERNEL_DEBUG((DBG_FNC_SBAPPEND | DBG_FUNC_END), sb, sb->sb_cc, 0, 0, 0);
-
- return result;
+ sbcompress(sb, m, sb->sb_mbtail);
+ sb->sb_lastrecord = sb->sb_mb;
+ SBLASTRECORDCHK(sb, "sbappendstream 2");
+ return (1);
}
#ifdef SOCKBUF_DEBUG
void
-sbcheck(sb)
- register struct sockbuf *sb;
+sbcheck(struct sockbuf *sb)
{
- register struct mbuf *m;
- register struct mbuf *n = 0;
- register u_long len = 0, mbcnt = 0;
+ struct mbuf *m;
+ struct mbuf *n = 0;
+ u_int32_t len = 0, mbcnt = 0;
lck_mtx_t *mutex_held;
- if (sb->sb_so->so_proto->pr_getlock != NULL)
+ if (sb->sb_so->so_proto->pr_getlock != NULL)
mutex_held = (*sb->sb_so->so_proto->pr_getlock)(sb->sb_so, 0);
- else
+ else
mutex_held = sb->sb_so->so_proto->pr_domain->dom_mtx;
lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED);
return;
for (m = sb->sb_mb; m; m = n) {
- n = m->m_nextpkt;
- for (; m; m = m->m_next) {
- len += m->m_len;
- mbcnt += MSIZE;
- if (m->m_flags & M_EXT) /*XXX*/ /* pretty sure this is bogus */
- mbcnt += m->m_ext.ext_size;
- }
- }
- if (len != sb->sb_cc || mbcnt != sb->sb_mbcnt) {
- panic("cc %ld != %ld || mbcnt %ld != %ld\n", len, sb->sb_cc,
- mbcnt, sb->sb_mbcnt);
- }
+ n = m->m_nextpkt;
+ for (; m; m = m->m_next) {
+ len += m->m_len;
+ mbcnt += MSIZE;
+ /* XXX pretty sure this is bogus */
+ if (m->m_flags & M_EXT)
+ mbcnt += m->m_ext.ext_size;
+ }
+ }
+ if (len != sb->sb_cc || mbcnt != sb->sb_mbcnt) {
+ panic("cc %ld != %ld || mbcnt %ld != %ld\n", len, sb->sb_cc,
+ mbcnt, sb->sb_mbcnt);
+ }
}
#endif
+void
+sblastrecordchk(struct sockbuf *sb, const char *where)
+{
+ struct mbuf *m = sb->sb_mb;
+
+ while (m && m->m_nextpkt)
+ m = m->m_nextpkt;
+
+ if (m != sb->sb_lastrecord) {
+ printf("sblastrecordchk: mb 0x%llx lastrecord 0x%llx "
+ "last 0x%llx\n",
+ (uint64_t)VM_KERNEL_ADDRPERM(sb->sb_mb),
+ (uint64_t)VM_KERNEL_ADDRPERM(sb->sb_lastrecord),
+ (uint64_t)VM_KERNEL_ADDRPERM(m));
+ printf("packet chain:\n");
+ for (m = sb->sb_mb; m != NULL; m = m->m_nextpkt)
+ printf("\t0x%llx\n", (uint64_t)VM_KERNEL_ADDRPERM(m));
+ panic("sblastrecordchk from %s", where);
+ }
+}
+
+void
+sblastmbufchk(struct sockbuf *sb, const char *where)
+{
+ struct mbuf *m = sb->sb_mb;
+ struct mbuf *n;
+
+ while (m && m->m_nextpkt)
+ m = m->m_nextpkt;
+
+ while (m && m->m_next)
+ m = m->m_next;
+
+ if (m != sb->sb_mbtail) {
+ printf("sblastmbufchk: mb 0x%llx mbtail 0x%llx last 0x%llx\n",
+ (uint64_t)VM_KERNEL_ADDRPERM(sb->sb_mb),
+ (uint64_t)VM_KERNEL_ADDRPERM(sb->sb_mbtail),
+ (uint64_t)VM_KERNEL_ADDRPERM(m));
+ printf("packet tree:\n");
+ for (m = sb->sb_mb; m != NULL; m = m->m_nextpkt) {
+ printf("\t");
+ for (n = m; n != NULL; n = n->m_next)
+ printf("0x%llx ",
+ (uint64_t)VM_KERNEL_ADDRPERM(n));
+ printf("\n");
+ }
+ panic("sblastmbufchk from %s", where);
+ }
+}
+
/*
- * As above, except the mbuf chain
- * begins a new record.
+ * Similar to sbappend, except the mbuf chain begins a new record.
*/
int
-sbappendrecord(sb, m0)
- register struct sockbuf *sb;
- register struct mbuf *m0;
+sbappendrecord(struct sockbuf *sb, struct mbuf *m0)
{
- register struct mbuf *m;
- int result = 0;
+ struct mbuf *m;
+ int space = 0;
+
+ if (m0 == NULL || (sb->sb_flags & SB_DROP)) {
+ if (m0 != NULL)
+ m_freem(m0);
+ return (0);
+ }
+
+ for (m = m0; m != NULL; m = m->m_next)
+ space += m->m_len;
+
+ if (space > sbspace(sb) && !(sb->sb_flags & SB_UNIX)) {
+ m_freem(m0);
+ return (0);
+ }
+
+ if (sb->sb_flags & SB_RECV && !(m0 && m0->m_flags & M_SKIPCFIL)) {
+ int error = sflt_data_in(sb->sb_so, NULL, &m0, NULL,
+ sock_data_filt_flag_record);
+
+#if CONTENT_FILTER
+ if (error == 0)
+ error = cfil_sock_data_in(sb->sb_so, NULL, m0, NULL, 0);
+#endif /* CONTENT_FILTER */
- if (m0 == 0)
- return 0;
-
- if ((sb->sb_flags & SB_RECV) != 0) {
- int error = sflt_data_in(sb->sb_so, NULL, &m0, NULL, sock_data_filt_flag_record, NULL);
if (error != 0) {
+ SBLASTRECORDCHK(sb, "sbappendrecord 1");
if (error != EJUSTRETURN)
m_freem(m0);
- return 0;
+ return (0);
}
+ } else if (m0) {
+ m0->m_flags &= ~M_SKIPCFIL;
}
-
- m = sb->sb_mb;
- if (m)
- while (m->m_nextpkt)
- m = m->m_nextpkt;
+
/*
- * Put the first mbuf on the queue.
* Note this permits zero length records.
*/
sballoc(sb, m0);
- if (m)
- m->m_nextpkt = m0;
- else
+ SBLASTRECORDCHK(sb, "sbappendrecord 2");
+ if (sb->sb_lastrecord != NULL) {
+ sb->sb_lastrecord->m_nextpkt = m0;
+ } else {
sb->sb_mb = m0;
+ }
+ sb->sb_lastrecord = m0;
+ sb->sb_mbtail = m0;
+
m = m0->m_next;
m0->m_next = 0;
if (m && (m0->m_flags & M_EOR)) {
m0->m_flags &= ~M_EOR;
m->m_flags |= M_EOR;
}
- return sbcompress(sb, m, m0);
+ sbcompress(sb, m, m0);
+ SBLASTRECORDCHK(sb, "sbappendrecord 3");
+ return (1);
}
/*
* but after any other OOB data.
*/
int
-sbinsertoob(sb, m0)
- struct sockbuf *sb;
- struct mbuf *m0;
+sbinsertoob(struct sockbuf *sb, struct mbuf *m0)
{
struct mbuf *m;
struct mbuf **mp;
if (m0 == 0)
- return 0;
-
- if ((sb->sb_flags & SB_RECV) != 0) {
+ return (0);
+
+ SBLASTRECORDCHK(sb, "sbinsertoob 1");
+
+ if ((sb->sb_flags & SB_RECV && !(m0->m_flags & M_SKIPCFIL)) != 0) {
int error = sflt_data_in(sb->sb_so, NULL, &m0, NULL,
- sock_data_filt_flag_oob, NULL);
-
+ sock_data_filt_flag_oob);
+
+ SBLASTRECORDCHK(sb, "sbinsertoob 2");
+
+#if CONTENT_FILTER
+ if (error == 0)
+ error = cfil_sock_data_in(sb->sb_so, NULL, m0, NULL, 0);
+#endif /* CONTENT_FILTER */
+
if (error) {
if (error != EJUSTRETURN) {
m_freem(m0);
}
- return 0;
+ return (0);
}
+ } else if (m0) {
+ m0->m_flags &= ~M_SKIPCFIL;
}
-
- for (mp = &sb->sb_mb; *mp ; mp = &((*mp)->m_nextpkt)) {
- m = *mp;
- again:
+
+ for (mp = &sb->sb_mb; *mp; mp = &((*mp)->m_nextpkt)) {
+ m = *mp;
+again:
switch (m->m_type) {
case MT_OOBDATA:
*/
sballoc(sb, m0);
m0->m_nextpkt = *mp;
+ if (*mp == NULL) {
+ /* m0 is actually the new tail */
+ sb->sb_lastrecord = m0;
+ }
*mp = m0;
m = m0->m_next;
m0->m_next = 0;
m0->m_flags &= ~M_EOR;
m->m_flags |= M_EOR;
}
- return sbcompress(sb, m, m0);
+ sbcompress(sb, m, m0);
+ SBLASTRECORDCHK(sb, "sbinsertoob 3");
+ return (1);
}
/*
* to the receive queue of a socket. If present,
* m0 must include a packet header with total length.
* Returns 0 if no space in sockbuf or insufficient mbufs.
+ *
+ * Returns: 0 No space/out of mbufs
+ * 1 Success
*/
static int
-sbappendaddr_internal(sb, asa, m0, control)
- register struct sockbuf *sb;
- struct sockaddr *asa;
- struct mbuf *m0, *control;
+sbappendaddr_internal(struct sockbuf *sb, struct sockaddr *asa,
+ struct mbuf *m0, struct mbuf *control)
{
- register struct mbuf *m, *n;
+ struct mbuf *m, *n, *nlast;
int space = asa->sa_len;
if (m0 && (m0->m_flags & M_PKTHDR) == 0)
else
control = m0;
m->m_next = control;
- for (n = m; n; n = n->m_next)
+
+ SBLASTRECORDCHK(sb, "sbappendadddr 1");
+
+ for (n = m; n->m_next != NULL; n = n->m_next)
sballoc(sb, n);
- n = sb->sb_mb;
- if (n) {
- while (n->m_nextpkt)
- n = n->m_nextpkt;
- n->m_nextpkt = m;
- } else
+ sballoc(sb, n);
+ nlast = n;
+
+ if (sb->sb_lastrecord != NULL) {
+ sb->sb_lastrecord->m_nextpkt = m;
+ } else {
sb->sb_mb = m;
- postevent(0,sb,EV_RWBYTES);
+ }
+ sb->sb_lastrecord = m;
+ sb->sb_mbtail = nlast;
+
+ SBLASTMBUFCHK(sb, __func__);
+ SBLASTRECORDCHK(sb, "sbappendadddr 2");
+
+ postevent(0, sb, EV_RWBYTES);
return (1);
}
+/*
+ * Returns: 0 Error: No space/out of mbufs/etc.
+ * 1 Success
+ *
+ * Imputed: (*error_out) errno for error
+ * ENOBUFS
+ * sflt_data_in:??? [whatever a filter author chooses]
+ */
int
-sbappendaddr(
- struct sockbuf* sb,
- struct sockaddr* asa,
- struct mbuf *m0,
- struct mbuf *control,
- int *error_out)
+sbappendaddr(struct sockbuf *sb, struct sockaddr *asa, struct mbuf *m0,
+ struct mbuf *control, int *error_out)
{
int result = 0;
-
- if (error_out) *error_out = 0;
-
+ boolean_t sb_unix = (sb->sb_flags & SB_UNIX);
+
+ if (error_out)
+ *error_out = 0;
+
if (m0 && (m0->m_flags & M_PKTHDR) == 0)
panic("sbappendaddrorfree");
-
- /* Call socket data in filters */
- if ((sb->sb_flags & SB_RECV) != 0) {
- int error;
- error = sflt_data_in(sb->sb_so, asa, &m0, &control, 0, NULL);
+
+ if (sb->sb_flags & SB_DROP) {
+ if (m0 != NULL)
+ m_freem(m0);
+ if (control != NULL && !sb_unix)
+ m_freem(control);
+ if (error_out != NULL)
+ *error_out = EINVAL;
+ return (0);
+ }
+
+ /* Call socket data in filters */
+ if (sb->sb_flags & SB_RECV && !(m0 && m0->m_flags & M_SKIPCFIL)) {
+ int error;
+ error = sflt_data_in(sb->sb_so, asa, &m0, &control, 0);
+ SBLASTRECORDCHK(sb, __func__);
+
+#if CONTENT_FILTER
+ if (error == 0)
+ error = cfil_sock_data_in(sb->sb_so, asa, m0, control,
+ 0);
+#endif /* CONTENT_FILTER */
+
if (error) {
if (error != EJUSTRETURN) {
- if (m0) m_freem(m0);
- if (control) m_freem(control);
- if (error_out) *error_out = error;
+ if (m0)
+ m_freem(m0);
+ if (control != NULL && !sb_unix)
+ m_freem(control);
+ if (error_out)
+ *error_out = error;
}
- return 0;
+ return (0);
}
+ } else if (m0) {
+ m0->m_flags &= ~M_SKIPCFIL;
}
-
+
result = sbappendaddr_internal(sb, asa, m0, control);
if (result == 0) {
- if (m0) m_freem(m0);
- if (control) m_freem(control);
- if (error_out) *error_out = ENOBUFS;
+ if (m0)
+ m_freem(m0);
+ if (control != NULL && !sb_unix)
+ m_freem(control);
+ if (error_out)
+ *error_out = ENOBUFS;
}
-
- return result;
+
+ return (result);
}
static int
-sbappendcontrol_internal(sb, m0, control)
- struct sockbuf *sb;
- struct mbuf *control, *m0;
+sbappendcontrol_internal(struct sockbuf *sb, struct mbuf *m0,
+ struct mbuf *control)
{
- register struct mbuf *m, *n;
+ struct mbuf *m, *mlast, *n;
int space = 0;
if (control == 0)
n = m; /* save pointer to last control buffer */
for (m = m0; m; m = m->m_next)
space += m->m_len;
- if (space > sbspace(sb))
+ if (space > sbspace(sb) && !(sb->sb_flags & SB_UNIX))
return (0);
n->m_next = m0; /* concatenate data to control */
- for (m = control; m; m = m->m_next)
+ SBLASTRECORDCHK(sb, "sbappendcontrol 1");
+
+ for (m = control; m->m_next != NULL; m = m->m_next)
sballoc(sb, m);
- n = sb->sb_mb;
- if (n) {
- while (n->m_nextpkt)
- n = n->m_nextpkt;
- n->m_nextpkt = control;
- } else
+ sballoc(sb, m);
+ mlast = m;
+
+ if (sb->sb_lastrecord != NULL) {
+ sb->sb_lastrecord->m_nextpkt = control;
+ } else {
sb->sb_mb = control;
- postevent(0,sb,EV_RWBYTES);
+ }
+ sb->sb_lastrecord = control;
+ sb->sb_mbtail = mlast;
+
+ SBLASTMBUFCHK(sb, __func__);
+ SBLASTRECORDCHK(sb, "sbappendcontrol 2");
+
+ postevent(0, sb, EV_RWBYTES);
return (1);
}
int
-sbappendcontrol(
- struct sockbuf *sb,
- struct mbuf *m0,
- struct mbuf *control,
- int *error_out)
+sbappendcontrol(struct sockbuf *sb, struct mbuf *m0, struct mbuf *control,
+ int *error_out)
{
int result = 0;
-
- if (error_out) *error_out = 0;
-
- if (sb->sb_flags & SB_RECV) {
+ boolean_t sb_unix = (sb->sb_flags & SB_UNIX);
+
+ if (error_out)
+ *error_out = 0;
+
+ if (sb->sb_flags & SB_DROP) {
+ if (m0 != NULL)
+ m_freem(m0);
+ if (control != NULL && !sb_unix)
+ m_freem(control);
+ if (error_out != NULL)
+ *error_out = EINVAL;
+ return (0);
+ }
+
+ if (sb->sb_flags & SB_RECV && !(m0 && m0->m_flags & M_SKIPCFIL)) {
int error;
- error = sflt_data_in(sb->sb_so, NULL, &m0, &control, 0, NULL);
+
+ error = sflt_data_in(sb->sb_so, NULL, &m0, &control, 0);
+ SBLASTRECORDCHK(sb, __func__);
+
+#if CONTENT_FILTER
+ if (error == 0)
+ error = cfil_sock_data_in(sb->sb_so, NULL, m0, control,
+ 0);
+#endif /* CONTENT_FILTER */
+
if (error) {
if (error != EJUSTRETURN) {
- if (m0) m_freem(m0);
- if (control) m_freem(control);
- if (error_out) *error_out = error;
+ if (m0)
+ m_freem(m0);
+ if (control != NULL && !sb_unix)
+ m_freem(control);
+ if (error_out)
+ *error_out = error;
}
- return 0;
+ return (0);
}
+ } else if (m0) {
+ m0->m_flags &= ~M_SKIPCFIL;
}
-
+
result = sbappendcontrol_internal(sb, m0, control);
if (result == 0) {
- if (m0) m_freem(m0);
- if (control) m_freem(control);
- if (error_out) *error_out = ENOBUFS;
+ if (m0)
+ m_freem(m0);
+ if (control != NULL && !sb_unix)
+ m_freem(control);
+ if (error_out)
+ *error_out = ENOBUFS;
+ }
+
+ return (result);
+}
+
+/*
+ * Append a contiguous TCP data blob with TCP sequence number as control data
+ * as a new msg to the receive socket buffer.
+ */
+int
+sbappendmsgstream_rcv(struct sockbuf *sb, struct mbuf *m, uint32_t seqnum,
+ int unordered)
+{
+ struct mbuf *m_eor = NULL;
+ u_int32_t data_len = 0;
+ int ret = 0;
+ struct socket *so = sb->sb_so;
+
+ VERIFY((m->m_flags & M_PKTHDR) && m_pktlen(m) > 0);
+ VERIFY(so->so_msg_state != NULL);
+ VERIFY(sb->sb_flags & SB_RECV);
+
+ /* Keep the TCP sequence number in the mbuf pkthdr */
+ m->m_pkthdr.msg_seq = seqnum;
+
+ /* find last mbuf and set M_EOR */
+ for (m_eor = m; ; m_eor = m_eor->m_next) {
+ /*
+ * If the msg is unordered, we need to account for
+ * these bytes in receive socket buffer size. Otherwise,
+ * the receive window advertised will shrink because
+ * of the additional unordered bytes added to the
+ * receive buffer.
+ */
+ if (unordered) {
+ m_eor->m_flags |= M_UNORDERED_DATA;
+ data_len += m_eor->m_len;
+ so->so_msg_state->msg_uno_bytes += m_eor->m_len;
+ } else {
+ m_eor->m_flags &= ~M_UNORDERED_DATA;
+ }
+ if (m_eor->m_next == NULL)
+ break;
+ }
+
+ /* set EOR flag at end of byte blob */
+ m_eor->m_flags |= M_EOR;
+
+ /* expand the receive socket buffer to allow unordered data */
+ if (unordered && !sbreserve(sb, sb->sb_hiwat + data_len)) {
+ /*
+ * Could not allocate memory for unordered data, it
+ * means this packet will have to be delivered in order
+ */
+ printf("%s: could not reserve space for unordered data\n",
+ __func__);
+ }
+
+ if (!unordered && (sb->sb_mbtail != NULL) &&
+ !(sb->sb_mbtail->m_flags & M_UNORDERED_DATA)) {
+ sb->sb_mbtail->m_flags &= ~M_EOR;
+ sbcompress(sb, m, sb->sb_mbtail);
+ ret = 1;
+ } else {
+ ret = sbappendrecord(sb, m);
+ }
+ VERIFY(sb->sb_mbtail->m_flags & M_EOR);
+ return (ret);
+}
+
+/*
+ * TCP streams have message based out of order delivery support, or have
+ * Multipath TCP support, or are regular TCP sockets
+ */
+int
+sbappendstream_rcvdemux(struct socket *so, struct mbuf *m, uint32_t seqnum,
+ int unordered)
+{
+ int ret = 0;
+
+ if ((m != NULL) && (m_pktlen(m) <= 0)) {
+ m_freem(m);
+ return (ret);
+ }
+
+ if (so->so_flags & SOF_ENABLE_MSGS) {
+ ret = sbappendmsgstream_rcv(&so->so_rcv, m, seqnum, unordered);
+ }
+#if MPTCP
+ else if (so->so_flags & SOF_MPTCP_TRUE) {
+ ret = sbappendmptcpstream_rcv(&so->so_rcv, m);
+ }
+#endif /* MPTCP */
+ else {
+ ret = sbappendstream(&so->so_rcv, m);
+ }
+ return (ret);
+}
+
+#if MPTCP
+int
+sbappendmptcpstream_rcv(struct sockbuf *sb, struct mbuf *m)
+{
+ struct socket *so = sb->sb_so;
+
+ VERIFY(m == NULL || (m->m_flags & M_PKTHDR));
+ /* SB_NOCOMPRESS must be set prevent loss of M_PKTHDR data */
+ VERIFY((sb->sb_flags & (SB_RECV|SB_NOCOMPRESS)) ==
+ (SB_RECV|SB_NOCOMPRESS));
+
+ if (m == NULL || m_pktlen(m) == 0 || (sb->sb_flags & SB_DROP) ||
+ (so->so_state & SS_CANTRCVMORE)) {
+ if (m != NULL)
+ m_freem(m);
+ return (0);
+ }
+ /* the socket is not closed, so SOF_MP_SUBFLOW must be set */
+ VERIFY(so->so_flags & SOF_MP_SUBFLOW);
+
+ if (m->m_nextpkt != NULL || (sb->sb_mb != sb->sb_lastrecord)) {
+ panic("%s: nexpkt %p || mb %p != lastrecord %p\n", __func__,
+ m->m_nextpkt, sb->sb_mb, sb->sb_lastrecord);
+ /* NOTREACHED */
+ }
+
+ SBLASTMBUFCHK(sb, __func__);
+
+ if (mptcp_adj_rmap(so, m) != 0)
+ return (0);
+
+ /* No filter support (SB_RECV) on mptcp subflow sockets */
+
+ sbcompress(sb, m, sb->sb_mbtail);
+ sb->sb_lastrecord = sb->sb_mb;
+ SBLASTRECORDCHK(sb, __func__);
+ return (1);
+}
+#endif /* MPTCP */
+
+/*
+ * Append message to send socket buffer based on priority.
+ */
+int
+sbappendmsg_snd(struct sockbuf *sb, struct mbuf *m)
+{
+ struct socket *so = sb->sb_so;
+ struct msg_priq *priq;
+ int set_eor = 0;
+
+ VERIFY(so->so_msg_state != NULL);
+
+ if (m->m_nextpkt != NULL || (sb->sb_mb != sb->sb_lastrecord))
+ panic("sbappendstream: nexpkt %p || mb %p != lastrecord %p\n",
+ m->m_nextpkt, sb->sb_mb, sb->sb_lastrecord);
+
+ SBLASTMBUFCHK(sb, __func__);
+
+ if (m == NULL || (sb->sb_flags & SB_DROP) || so->so_msg_state == NULL) {
+ if (m != NULL)
+ m_freem(m);
+ return (0);
+ }
+
+ priq = &so->so_msg_state->msg_priq[m->m_pkthdr.msg_pri];
+
+ /* note if we need to propogate M_EOR to the last mbuf */
+ if (m->m_flags & M_EOR) {
+ set_eor = 1;
+
+ /* Reset M_EOR from the first mbuf */
+ m->m_flags &= ~(M_EOR);
+ }
+
+ if (priq->msgq_head == NULL) {
+ VERIFY(priq->msgq_tail == NULL && priq->msgq_lastmsg == NULL);
+ priq->msgq_head = priq->msgq_lastmsg = m;
+ } else {
+ VERIFY(priq->msgq_tail->m_next == NULL);
+
+ /* Check if the last message has M_EOR flag set */
+ if (priq->msgq_tail->m_flags & M_EOR) {
+ /* Insert as a new message */
+ priq->msgq_lastmsg->m_nextpkt = m;
+
+ /* move the lastmsg pointer */
+ priq->msgq_lastmsg = m;
+ } else {
+ /* Append to the existing message */
+ priq->msgq_tail->m_next = m;
+ }
+ }
+
+ /* Update accounting and the queue tail pointer */
+
+ while (m->m_next != NULL) {
+ sballoc(sb, m);
+ priq->msgq_bytes += m->m_len;
+ m = m->m_next;
+ }
+ sballoc(sb, m);
+ priq->msgq_bytes += m->m_len;
+
+ if (set_eor) {
+ m->m_flags |= M_EOR;
+
+ /*
+ * Since the user space can not write a new msg
+ * without completing the previous one, we can
+ * reset this flag to start sending again.
+ */
+ priq->msgq_flags &= ~(MSGQ_MSG_NOTDONE);
}
-
- return result;
+
+ priq->msgq_tail = m;
+
+ SBLASTRECORDCHK(sb, "sbappendstream 2");
+ postevent(0, sb, EV_RWBYTES);
+ return (1);
+}
+
+/*
+ * Pull data from priority queues to the serial snd queue
+ * right before sending.
+ */
+void
+sbpull_unordered_data(struct socket *so, int32_t off, int32_t len)
+{
+ int32_t topull, i;
+ struct msg_priq *priq = NULL;
+
+ VERIFY(so->so_msg_state != NULL);
+
+ topull = (off + len) - so->so_msg_state->msg_serial_bytes;
+
+ i = MSG_PRI_MAX;
+ while (i >= MSG_PRI_MIN && topull > 0) {
+ struct mbuf *m = NULL, *mqhead = NULL, *mend = NULL;
+ priq = &so->so_msg_state->msg_priq[i];
+ if ((priq->msgq_flags & MSGQ_MSG_NOTDONE) &&
+ priq->msgq_head == NULL) {
+ /*
+ * We were in the middle of sending
+ * a message and we have not seen the
+ * end of it.
+ */
+ VERIFY(priq->msgq_lastmsg == NULL &&
+ priq->msgq_tail == NULL);
+ return;
+ }
+ if (priq->msgq_head != NULL) {
+ int32_t bytes = 0, topull_tmp = topull;
+ /*
+ * We found a msg while scanning the priority
+ * queue from high to low priority.
+ */
+ m = priq->msgq_head;
+ mqhead = m;
+ mend = m;
+
+ /*
+ * Move bytes from the priority queue to the
+ * serial queue. Compute the number of bytes
+ * being added.
+ */
+ while (mqhead->m_next != NULL && topull_tmp > 0) {
+ bytes += mqhead->m_len;
+ topull_tmp -= mqhead->m_len;
+ mend = mqhead;
+ mqhead = mqhead->m_next;
+ }
+
+ if (mqhead->m_next == NULL) {
+ /*
+ * If we have only one more mbuf left,
+ * move the last mbuf of this message to
+ * serial queue and set the head of the
+ * queue to be the next message.
+ */
+ bytes += mqhead->m_len;
+ mend = mqhead;
+ mqhead = m->m_nextpkt;
+ if (!(mend->m_flags & M_EOR)) {
+ /*
+ * We have not seen the end of
+ * this message, so we can not
+ * pull anymore.
+ */
+ priq->msgq_flags |= MSGQ_MSG_NOTDONE;
+ } else {
+ /* Reset M_EOR */
+ mend->m_flags &= ~(M_EOR);
+ }
+ } else {
+ /* propogate the next msg pointer */
+ mqhead->m_nextpkt = m->m_nextpkt;
+ }
+ priq->msgq_head = mqhead;
+
+ /*
+ * if the lastmsg pointer points to
+ * the mbuf that is being dequeued, update
+ * it to point to the new head.
+ */
+ if (priq->msgq_lastmsg == m)
+ priq->msgq_lastmsg = priq->msgq_head;
+
+ m->m_nextpkt = NULL;
+ mend->m_next = NULL;
+
+ if (priq->msgq_head == NULL) {
+ /* Moved all messages, update tail */
+ priq->msgq_tail = NULL;
+ VERIFY(priq->msgq_lastmsg == NULL);
+ }
+
+ /* Move it to serial sb_mb queue */
+ if (so->so_snd.sb_mb == NULL) {
+ so->so_snd.sb_mb = m;
+ } else {
+ so->so_snd.sb_mbtail->m_next = m;
+ }
+
+ priq->msgq_bytes -= bytes;
+ VERIFY(priq->msgq_bytes >= 0);
+ sbwakeup(&so->so_snd);
+
+ so->so_msg_state->msg_serial_bytes += bytes;
+ so->so_snd.sb_mbtail = mend;
+ so->so_snd.sb_lastrecord = so->so_snd.sb_mb;
+
+ topull =
+ (off + len) - so->so_msg_state->msg_serial_bytes;
+
+ if (priq->msgq_flags & MSGQ_MSG_NOTDONE)
+ break;
+ } else {
+ --i;
+ }
+ }
+ sblastrecordchk(&so->so_snd, "sbpull_unordered_data");
+ sblastmbufchk(&so->so_snd, "sbpull_unordered_data");
}
/*
* buffer sb following mbuf n. If n
* is null, the buffer is presumed empty.
*/
-static int
-sbcompress(sb, m, n)
- register struct sockbuf *sb;
- register struct mbuf *m, *n;
-{
- register int eor = 0;
- register struct mbuf *o;
+static inline void
+sbcompress(struct sockbuf *sb, struct mbuf *m, struct mbuf *n)
+{
+ int eor = 0, compress = (!(sb->sb_flags & SB_NOCOMPRESS));
+ struct mbuf *o;
+
+ if (m == NULL) {
+ /* There is nothing to compress; just update the tail */
+ for (; n->m_next != NULL; n = n->m_next)
+ ;
+ sb->sb_mbtail = n;
+ goto done;
+ }
- while (m) {
+ while (m != NULL) {
eor |= m->m_flags & M_EOR;
- if (m->m_len == 0 &&
- (eor == 0 ||
- (((o = m->m_next) || (o = n)) &&
- o->m_type == m->m_type))) {
+ if (compress && m->m_len == 0 && (eor == 0 ||
+ (((o = m->m_next) || (o = n)) && o->m_type == m->m_type))) {
+ if (sb->sb_lastrecord == m)
+ sb->sb_lastrecord = m->m_next;
m = m_free(m);
continue;
}
- if (n && (n->m_flags & M_EOR) == 0 &&
+ if (compress && n != NULL && (n->m_flags & M_EOR) == 0 &&
#ifndef __APPLE__
M_WRITABLE(n) &&
#endif
(unsigned)m->m_len);
n->m_len += m->m_len;
sb->sb_cc += m->m_len;
+ if (m->m_type != MT_DATA && m->m_type != MT_HEADER &&
+ m->m_type != MT_OOBDATA) {
+ /* XXX: Probably don't need */
+ sb->sb_ctl += m->m_len;
+ }
m = m_free(m);
continue;
}
- if (n)
+ if (n != NULL)
n->m_next = m;
else
sb->sb_mb = m;
+ sb->sb_mbtail = m;
sballoc(sb, m);
n = m;
m->m_flags &= ~M_EOR;
m = m->m_next;
- n->m_next = 0;
+ n->m_next = NULL;
}
- if (eor) {
- if (n)
+ if (eor != 0) {
+ if (n != NULL)
n->m_flags |= eor;
else
printf("semi-panic: sbcompress\n");
}
- postevent(0,sb, EV_RWBYTES);
- return 1;
+done:
+ SBLASTMBUFCHK(sb, __func__);
+ postevent(0, sb, EV_RWBYTES);
+}
+
+void
+sb_empty_assert(struct sockbuf *sb, const char *where)
+{
+ if (!(sb->sb_cc == 0 && sb->sb_mb == NULL && sb->sb_mbcnt == 0 &&
+ sb->sb_mbtail == NULL && sb->sb_lastrecord == NULL)) {
+ panic("%s: sb %p so %p cc %d mbcnt %d mb %p mbtail %p "
+ "lastrecord %p\n", where, sb, sb->sb_so, sb->sb_cc,
+ sb->sb_mbcnt, sb->sb_mb, sb->sb_mbtail,
+ sb->sb_lastrecord);
+ /* NOTREACHED */
+ }
+}
+
+static void
+sbflush_priq(struct msg_priq *priq)
+{
+ struct mbuf *m;
+ m = priq->msgq_head;
+ if (m != NULL)
+ m_freem_list(m);
+ priq->msgq_head = priq->msgq_tail = priq->msgq_lastmsg = NULL;
+ priq->msgq_bytes = priq->msgq_flags = 0;
}
/*
* Check that all resources are reclaimed.
*/
void
-sbflush(sb)
- register struct sockbuf *sb;
+sbflush(struct sockbuf *sb)
{
- if (sb->sb_so == NULL)
- panic ("sbflush sb->sb_so already null sb=%x\n", sb);
- (void)sblock(sb, M_WAIT);
- while (sb->sb_mbcnt) {
+ void *lr_saved = __builtin_return_address(0);
+ struct socket *so = sb->sb_so;
+#ifdef notyet
+ lck_mtx_t *mutex_held;
+#endif
+ u_int32_t i;
+
+ /* so_usecount may be 0 if we get here from sofreelastref() */
+ if (so == NULL) {
+ panic("%s: null so, sb=%p sb_flags=0x%x lr=%p\n",
+ __func__, sb, sb->sb_flags, lr_saved);
+ /* NOTREACHED */
+ } else if (so->so_usecount < 0) {
+ panic("%s: sb=%p sb_flags=0x%x sb_so=%p usecount=%d lr=%p "
+ "lrh= %s\n", __func__, sb, sb->sb_flags, so,
+ so->so_usecount, lr_saved, solockhistory_nr(so));
+ /* NOTREACHED */
+ }
+#ifdef notyet
+ /*
+ * XXX: This code is currently commented out, because we may get here
+ * as part of sofreelastref(), and at that time, pr_getlock() may no
+ * longer be able to return us the lock; this will be fixed in future.
+ */
+ if (so->so_proto->pr_getlock != NULL)
+ mutex_held = (*so->so_proto->pr_getlock)(so, 0);
+ else
+ mutex_held = so->so_proto->pr_domain->dom_mtx;
+
+ lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED);
+#endif
+
+ /*
+ * Obtain lock on the socket buffer (SB_LOCK). This is required
+ * to prevent the socket buffer from being unexpectedly altered
+ * while it is used by another thread in socket send/receive.
+ *
+ * sblock() must not fail here, hence the assertion.
+ */
+ (void) sblock(sb, SBL_WAIT | SBL_NOINTR | SBL_IGNDEFUNCT);
+ VERIFY(sb->sb_flags & SB_LOCK);
+
+ while (sb->sb_mbcnt > 0) {
/*
* Don't call sbdrop(sb, 0) if the leading mbuf is non-empty:
* we would loop forever. Panic instead.
break;
sbdrop(sb, (int)sb->sb_cc);
}
- if (sb->sb_cc || sb->sb_mb || sb->sb_mbcnt || sb->sb_so == NULL)
- panic("sbflush: cc %ld || mb %p || mbcnt %ld sb_so=%x", sb->sb_cc, (void *)sb->sb_mb, sb->sb_mbcnt, sb->sb_so);
+ if (!(sb->sb_flags & SB_RECV) && (so->so_flags & SOF_ENABLE_MSGS)) {
+ VERIFY(so->so_msg_state != NULL);
+ for (i = MSG_PRI_MIN; i <= MSG_PRI_MAX; ++i) {
+ sbflush_priq(&so->so_msg_state->msg_priq[i]);
+ }
+ so->so_msg_state->msg_serial_bytes = 0;
+ so->so_msg_state->msg_uno_bytes = 0;
+ }
+
+ sb_empty_assert(sb, __func__);
postevent(0, sb, EV_RWBYTES);
- sbunlock(sb, 1); /* keep socket locked */
+ sbunlock(sb, TRUE); /* keep socket locked */
}
/*
* m_freem_list.
*/
void
-sbdrop(sb, len)
- register struct sockbuf *sb;
- register int len;
+sbdrop(struct sockbuf *sb, int len)
{
- register struct mbuf *m, *free_list, *ml;
+ struct mbuf *m, *free_list, *ml;
struct mbuf *next, *last;
+ next = (m = sb->sb_mb) ? m->m_nextpkt : 0;
+#if MPTCP
+ if ((m != NULL) && (len > 0) &&
+ (!(sb->sb_flags & SB_RECV)) &&
+ ((sb->sb_so->so_flags & SOF_MP_SUBFLOW) ||
+ ((SOCK_CHECK_DOM(sb->sb_so, PF_MULTIPATH)) &&
+ (SOCK_CHECK_PROTO(sb->sb_so, IPPROTO_TCP)))) &&
+ (!(sb->sb_so->so_flags1 & SOF1_POST_FALLBACK_SYNC))) {
+ mptcp_preproc_sbdrop(m, (unsigned int)len);
+ }
+#endif /* MPTCP */
KERNEL_DEBUG((DBG_FNC_SBDROP | DBG_FUNC_START), sb, len, 0, 0, 0);
- next = (m = sb->sb_mb) ? m->m_nextpkt : 0;
free_list = last = m;
ml = (struct mbuf *)0;
while (len > 0) {
if (m == 0) {
- if (next == 0) {
- /* temporarily replacing this panic with printf because
- * it occurs occasionally when closing a socket when there
- * is no harm in ignoring it. This problem will be investigated
- * further.
- */
- /* panic("sbdrop"); */
- printf("sbdrop - count not zero\n");
- len = 0;
- /* zero the counts. if we have no mbufs, we have no data (PR-2986815) */
- sb->sb_cc = 0;
- sb->sb_mbcnt = 0;
- break;
- }
- m = last = next;
- next = m->m_nextpkt;
- continue;
+ if (next == 0) {
+ /*
+ * temporarily replacing this panic with printf
+ * because it occurs occasionally when closing
+ * a socket when there is no harm in ignoring
+ * it. This problem will be investigated
+ * further.
+ */
+ /* panic("sbdrop"); */
+ printf("sbdrop - count not zero\n");
+ len = 0;
+ /*
+ * zero the counts. if we have no mbufs,
+ * we have no data (PR-2986815)
+ */
+ sb->sb_cc = 0;
+ sb->sb_mbcnt = 0;
+ if (!(sb->sb_flags & SB_RECV) &&
+ (sb->sb_so->so_flags & SOF_ENABLE_MSGS)) {
+ sb->sb_so->so_msg_state->
+ msg_serial_bytes = 0;
+ }
+ break;
+ }
+ m = last = next;
+ next = m->m_nextpkt;
+ continue;
}
if (m->m_len > len) {
m->m_len -= len;
m->m_data += len;
sb->sb_cc -= len;
+ if (m->m_type != MT_DATA && m->m_type != MT_HEADER &&
+ m->m_type != MT_OOBDATA)
+ sb->sb_ctl -= len;
break;
}
len -= m->m_len;
m = m->m_next;
}
if (ml) {
- ml->m_next = (struct mbuf *)0;
+ ml->m_next = (struct mbuf *)0;
last->m_nextpkt = (struct mbuf *)0;
- m_freem_list(free_list);
+ m_freem_list(free_list);
}
if (m) {
sb->sb_mb = m;
m->m_nextpkt = next;
- } else
+ } else {
sb->sb_mb = next;
+ }
+
+ /*
+ * First part is an inline SB_EMPTY_FIXUP(). Second part
+ * makes sure sb_lastrecord is up-to-date if we dropped
+ * part of the last record.
+ */
+ m = sb->sb_mb;
+ if (m == NULL) {
+ sb->sb_mbtail = NULL;
+ sb->sb_lastrecord = NULL;
+ } else if (m->m_nextpkt == NULL) {
+ sb->sb_lastrecord = m;
+ }
+
+#if CONTENT_FILTER
+ cfil_sock_buf_update(sb);
+#endif /* CONTENT_FILTER */
postevent(0, sb, EV_RWBYTES);
* and move the next record to the front.
*/
void
-sbdroprecord(sb)
- register struct sockbuf *sb;
+sbdroprecord(struct sockbuf *sb)
{
- register struct mbuf *m, *mn;
+ struct mbuf *m, *mn;
m = sb->sb_mb;
if (m) {
m = mn;
} while (m);
}
+ SB_EMPTY_FIXUP(sb);
postevent(0, sb, EV_RWBYTES);
}
* with the specified type for presentation on a socket buffer.
*/
struct mbuf *
-sbcreatecontrol(p, size, type, level)
- caddr_t p;
- register int size;
- int type, level;
+sbcreatecontrol(caddr_t p, int size, int type, int level)
{
- register struct cmsghdr *cp;
+ struct cmsghdr *cp;
struct mbuf *m;
if (CMSG_SPACE((u_int)size) > MLEN)
- return ((struct mbuf *) NULL);
+ return ((struct mbuf *)NULL);
if ((m = m_get(M_DONTWAIT, MT_CONTROL)) == NULL)
- return ((struct mbuf *) NULL);
+ return ((struct mbuf *)NULL);
cp = mtod(m, struct cmsghdr *);
+ VERIFY(IS_P2ALIGNED(cp, sizeof (u_int32_t)));
/* XXX check size? */
- (void)memcpy(CMSG_DATA(cp), p, size);
+ (void) memcpy(CMSG_DATA(cp), p, size);
m->m_len = CMSG_SPACE(size);
cp->cmsg_len = CMSG_LEN(size);
cp->cmsg_level = level;
return (m);
}
+struct mbuf **
+sbcreatecontrol_mbuf(caddr_t p, int size, int type, int level, struct mbuf **mp)
+{
+ struct mbuf *m;
+ struct cmsghdr *cp;
+
+ if (*mp == NULL) {
+ *mp = sbcreatecontrol(p, size, type, level);
+ return (mp);
+ }
+
+ if (CMSG_SPACE((u_int)size) + (*mp)->m_len > MLEN) {
+ mp = &(*mp)->m_next;
+ *mp = sbcreatecontrol(p, size, type, level);
+ return (mp);
+ }
+
+ m = *mp;
+
+ cp = (struct cmsghdr *)(void *)(mtod(m, char *) + m->m_len);
+ /* CMSG_SPACE ensures 32-bit alignment */
+ VERIFY(IS_P2ALIGNED(cp, sizeof (u_int32_t)));
+ m->m_len += CMSG_SPACE(size);
+
+ /* XXX check size? */
+ (void) memcpy(CMSG_DATA(cp), p, size);
+ cp->cmsg_len = CMSG_LEN(size);
+ cp->cmsg_level = level;
+ cp->cmsg_type = type;
+
+ return (mp);
+}
+
+
/*
* Some routines that return EOPNOTSUPP for entry points that are not
* supported by a protocol. Fill in as needed.
int
pru_abort_notsupp(struct socket *so)
{
- return EOPNOTSUPP;
+#pragma unused(so)
+ return (EOPNOTSUPP);
}
-
int
pru_accept_notsupp(struct socket *so, struct sockaddr **nam)
{
- return EOPNOTSUPP;
+#pragma unused(so, nam)
+ return (EOPNOTSUPP);
}
int
pru_attach_notsupp(struct socket *so, int proto, struct proc *p)
{
- return EOPNOTSUPP;
+#pragma unused(so, proto, p)
+ return (EOPNOTSUPP);
}
int
pru_bind_notsupp(struct socket *so, struct sockaddr *nam, struct proc *p)
{
- return EOPNOTSUPP;
+#pragma unused(so, nam, p)
+ return (EOPNOTSUPP);
}
int
pru_connect_notsupp(struct socket *so, struct sockaddr *nam, struct proc *p)
{
- return EOPNOTSUPP;
+#pragma unused(so, nam, p)
+ return (EOPNOTSUPP);
}
int
pru_connect2_notsupp(struct socket *so1, struct socket *so2)
{
- return EOPNOTSUPP;
+#pragma unused(so1, so2)
+ return (EOPNOTSUPP);
+}
+
+int
+pru_connectx_notsupp(struct socket *so, struct sockaddr_list **src_sl,
+ struct sockaddr_list **dst_sl, struct proc *p, uint32_t ifscope,
+ sae_associd_t aid, sae_connid_t *pcid, uint32_t flags, void *arg,
+ uint32_t arglen, struct uio *uio, user_ssize_t *bytes_written)
+{
+#pragma unused(so, src_sl, dst_sl, p, ifscope, aid, pcid, flags, arg, arglen, uio, bytes_written)
+ return (EOPNOTSUPP);
}
int
pru_control_notsupp(struct socket *so, u_long cmd, caddr_t data,
- struct ifnet *ifp, struct proc *p)
+ struct ifnet *ifp, struct proc *p)
{
- return EOPNOTSUPP;
+#pragma unused(so, cmd, data, ifp, p)
+ return (EOPNOTSUPP);
}
int
pru_detach_notsupp(struct socket *so)
{
- return EOPNOTSUPP;
+#pragma unused(so)
+ return (EOPNOTSUPP);
}
int
pru_disconnect_notsupp(struct socket *so)
{
- return EOPNOTSUPP;
+#pragma unused(so)
+ return (EOPNOTSUPP);
+}
+
+int
+pru_disconnectx_notsupp(struct socket *so, sae_associd_t aid, sae_connid_t cid)
+{
+#pragma unused(so, aid, cid)
+ return (EOPNOTSUPP);
}
int
pru_listen_notsupp(struct socket *so, struct proc *p)
{
- return EOPNOTSUPP;
+#pragma unused(so, p)
+ return (EOPNOTSUPP);
+}
+
+int
+pru_peeloff_notsupp(struct socket *so, sae_associd_t aid, struct socket **psop)
+{
+#pragma unused(so, aid, psop)
+ return (EOPNOTSUPP);
}
int
pru_peeraddr_notsupp(struct socket *so, struct sockaddr **nam)
{
- return EOPNOTSUPP;
+#pragma unused(so, nam)
+ return (EOPNOTSUPP);
}
int
pru_rcvd_notsupp(struct socket *so, int flags)
{
- return EOPNOTSUPP;
+#pragma unused(so, flags)
+ return (EOPNOTSUPP);
}
int
pru_rcvoob_notsupp(struct socket *so, struct mbuf *m, int flags)
{
- return EOPNOTSUPP;
+#pragma unused(so, m, flags)
+ return (EOPNOTSUPP);
}
int
pru_send_notsupp(struct socket *so, int flags, struct mbuf *m,
- struct sockaddr *addr, struct mbuf *control,
- struct proc *p)
-
+ struct sockaddr *addr, struct mbuf *control, struct proc *p)
{
- return EOPNOTSUPP;
+#pragma unused(so, flags, m, addr, control, p)
+ return (EOPNOTSUPP);
}
+int
+pru_send_list_notsupp(struct socket *so, int flags, struct mbuf *m,
+ struct sockaddr *addr, struct mbuf *control, struct proc *p)
+{
+#pragma unused(so, flags, m, addr, control, p)
+ return (EOPNOTSUPP);
+}
/*
* This isn't really a ``null'' operation, but it's the default one
* and doesn't do anything destructive.
*/
int
-pru_sense_null(struct socket *so, struct stat *sb)
+pru_sense_null(struct socket *so, void *ub, int isstat64)
{
- sb->st_blksize = so->so_snd.sb_hiwat;
- return 0;
+ if (isstat64 != 0) {
+ struct stat64 *sb64;
+
+ sb64 = (struct stat64 *)ub;
+ sb64->st_blksize = so->so_snd.sb_hiwat;
+ } else {
+ struct stat *sb;
+
+ sb = (struct stat *)ub;
+ sb->st_blksize = so->so_snd.sb_hiwat;
+ }
+
+ return (0);
}
-int pru_sosend_notsupp(struct socket *so, struct sockaddr *addr,
- struct uio *uio, struct mbuf *top,
- struct mbuf *control, int flags)
+int
+pru_sosend_notsupp(struct socket *so, struct sockaddr *addr, struct uio *uio,
+ struct mbuf *top, struct mbuf *control, int flags)
+{
+#pragma unused(so, addr, uio, top, control, flags)
+ return (EOPNOTSUPP);
+}
+int
+pru_sosend_list_notsupp(struct socket *so, struct uio **uio,
+ u_int uiocnt, int flags)
{
- return EOPNOTSUPP;
+#pragma unused(so, uio, uiocnt, flags)
+ return (EOPNOTSUPP);
}
-int pru_soreceive_notsupp(struct socket *so,
- struct sockaddr **paddr,
- struct uio *uio, struct mbuf **mp0,
- struct mbuf **controlp, int *flagsp)
+int
+pru_soreceive_notsupp(struct socket *so, struct sockaddr **paddr,
+ struct uio *uio, struct mbuf **mp0, struct mbuf **controlp, int *flagsp)
{
- return EOPNOTSUPP;
+#pragma unused(so, paddr, uio, mp0, controlp, flagsp)
+ return (EOPNOTSUPP);
}
int
+pru_soreceive_list_notsupp(struct socket *so,
+ struct recv_msg_elem *recv_msg_array, u_int uiocnt, int *flagsp)
+{
+#pragma unused(so, recv_msg_array, uiocnt, flagsp)
+ return (EOPNOTSUPP);
+}
+int
pru_shutdown_notsupp(struct socket *so)
{
- return EOPNOTSUPP;
+#pragma unused(so)
+ return (EOPNOTSUPP);
}
int
pru_sockaddr_notsupp(struct socket *so, struct sockaddr **nam)
{
- return EOPNOTSUPP;
+#pragma unused(so, nam)
+ return (EOPNOTSUPP);
}
-int pru_sosend(struct socket *so, struct sockaddr *addr,
- struct uio *uio, struct mbuf *top,
- struct mbuf *control, int flags)
+int
+pru_sopoll_notsupp(struct socket *so, int events, kauth_cred_t cred, void *wql)
{
- return EOPNOTSUPP;
+#pragma unused(so, events, cred, wql)
+ return (EOPNOTSUPP);
}
-int pru_soreceive(struct socket *so,
- struct sockaddr **paddr,
- struct uio *uio, struct mbuf **mp0,
- struct mbuf **controlp, int *flagsp)
+int
+pru_socheckopt_null(struct socket *so, struct sockopt *sopt)
{
- return EOPNOTSUPP;
+#pragma unused(so, sopt)
+ /*
+ * Allow all options for set/get by default.
+ */
+ return (0);
}
-
-int
-pru_sopoll_notsupp(__unused struct socket *so, __unused int events,
- __unused kauth_cred_t cred, __unused void *wql)
+static int
+pru_preconnect_null(struct socket *so)
{
- return EOPNOTSUPP;
+#pragma unused(so)
+ return (0);
}
+void
+pru_sanitize(struct pr_usrreqs *pru)
+{
+#define DEFAULT(foo, bar) if ((foo) == NULL) (foo) = (bar)
+ DEFAULT(pru->pru_abort, pru_abort_notsupp);
+ DEFAULT(pru->pru_accept, pru_accept_notsupp);
+ DEFAULT(pru->pru_attach, pru_attach_notsupp);
+ DEFAULT(pru->pru_bind, pru_bind_notsupp);
+ DEFAULT(pru->pru_connect, pru_connect_notsupp);
+ DEFAULT(pru->pru_connect2, pru_connect2_notsupp);
+ DEFAULT(pru->pru_connectx, pru_connectx_notsupp);
+ DEFAULT(pru->pru_control, pru_control_notsupp);
+ DEFAULT(pru->pru_detach, pru_detach_notsupp);
+ DEFAULT(pru->pru_disconnect, pru_disconnect_notsupp);
+ DEFAULT(pru->pru_disconnectx, pru_disconnectx_notsupp);
+ DEFAULT(pru->pru_listen, pru_listen_notsupp);
+ DEFAULT(pru->pru_peeloff, pru_peeloff_notsupp);
+ DEFAULT(pru->pru_peeraddr, pru_peeraddr_notsupp);
+ DEFAULT(pru->pru_rcvd, pru_rcvd_notsupp);
+ DEFAULT(pru->pru_rcvoob, pru_rcvoob_notsupp);
+ DEFAULT(pru->pru_send, pru_send_notsupp);
+ DEFAULT(pru->pru_send_list, pru_send_list_notsupp);
+ DEFAULT(pru->pru_sense, pru_sense_null);
+ DEFAULT(pru->pru_shutdown, pru_shutdown_notsupp);
+ DEFAULT(pru->pru_sockaddr, pru_sockaddr_notsupp);
+ DEFAULT(pru->pru_sopoll, pru_sopoll_notsupp);
+ DEFAULT(pru->pru_soreceive, pru_soreceive_notsupp);
+ DEFAULT(pru->pru_soreceive_list, pru_soreceive_list_notsupp);
+ DEFAULT(pru->pru_sosend, pru_sosend_notsupp);
+ DEFAULT(pru->pru_sosend_list, pru_sosend_list_notsupp);
+ DEFAULT(pru->pru_socheckopt, pru_socheckopt_null);
+ DEFAULT(pru->pru_preconnect, pru_preconnect_null);
+#undef DEFAULT
+}
-#ifdef __APPLE__
/*
* The following are macros on BSD and functions on Darwin
*/
* Do we need to notify the other side when I/O is possible?
*/
-int
+int
sb_notify(struct sockbuf *sb)
{
- return ((sb->sb_flags & (SB_WAIT|SB_SEL|SB_ASYNC|SB_UPCALL|SB_KNOTE)) != 0);
+ return (sb->sb_waiters > 0 ||
+ (sb->sb_flags & (SB_SEL|SB_ASYNC|SB_UPCALL|SB_KNOTE)));
}
/*
* How much space is there in a socket buffer (so->so_snd or so->so_rcv)?
* This is problematical if the fields are unsigned, as the space might
* still be negative (cc > hiwat or mbcnt > mbmax). Should detect
- * overflow and return 0. Should use "lmin" but it doesn't exist now.
+ * overflow and return 0.
*/
-long
+int
sbspace(struct sockbuf *sb)
{
- return ((long) imin((int)(sb->sb_hiwat - sb->sb_cc),
- (int)(sb->sb_mbmax - sb->sb_mbcnt)));
+ int pending = 0;
+ int space = imin((int)(sb->sb_hiwat - sb->sb_cc),
+ (int)(sb->sb_mbmax - sb->sb_mbcnt));
+
+ if (sb->sb_preconn_hiwat != 0)
+ space = imin((int)(sb->sb_preconn_hiwat - sb->sb_cc), space);
+
+ if (space < 0)
+ space = 0;
+
+ /* Compensate for data being processed by content filters */
+#if CONTENT_FILTER
+ pending = cfil_sock_data_space(sb);
+#endif /* CONTENT_FILTER */
+ if (pending > space)
+ space = 0;
+ else
+ space -= pending;
+
+ return (space);
+}
+
+/*
+ * If this socket has priority queues, check if there is enough
+ * space in the priority queue for this msg.
+ */
+int
+msgq_sbspace(struct socket *so, struct mbuf *control)
+{
+ int space = 0, error;
+ u_int32_t msgpri;
+ VERIFY(so->so_type == SOCK_STREAM &&
+ SOCK_PROTO(so) == IPPROTO_TCP);
+ if (control != NULL) {
+ error = tcp_get_msg_priority(control, &msgpri);
+ if (error)
+ return (0);
+ } else {
+ msgpri = MSG_PRI_0;
+ }
+ space = (so->so_snd.sb_idealsize / MSG_PRI_COUNT) -
+ so->so_msg_state->msg_priq[msgpri].msgq_bytes;
+ if (space < 0)
+ space = 0;
+ return (space);
}
/* do we have to send all at once on a socket? */
int
sosendallatonce(struct socket *so)
{
- return (so->so_proto->pr_flags & PR_ATOMIC);
+ return (so->so_proto->pr_flags & PR_ATOMIC);
}
/* can we read something from so? */
int
soreadable(struct socket *so)
{
- return (so->so_rcv.sb_cc >= so->so_rcv.sb_lowat ||
- (so->so_state & SS_CANTRCVMORE) ||
- so->so_comp.tqh_first || so->so_error);
+ return (so->so_rcv.sb_cc >= so->so_rcv.sb_lowat ||
+ ((so->so_state & SS_CANTRCVMORE)
+#if CONTENT_FILTER
+ && cfil_sock_data_pending(&so->so_rcv) == 0
+#endif /* CONTENT_FILTER */
+ ) ||
+ so->so_comp.tqh_first || so->so_error);
}
/* can we write something to so? */
int
sowriteable(struct socket *so)
{
- return ((sbspace(&(so)->so_snd) >= (so)->so_snd.sb_lowat &&
- ((so->so_state&SS_ISCONNECTED) ||
- (so->so_proto->pr_flags&PR_CONNREQUIRED)==0)) ||
- (so->so_state & SS_CANTSENDMORE) ||
- so->so_error);
+ if ((so->so_state & SS_CANTSENDMORE) ||
+ so->so_error > 0)
+ return (1);
+ if (so_wait_for_if_feedback(so) || !socanwrite(so))
+ return (0);
+ if (so->so_flags1 & SOF1_PRECONNECT_DATA)
+ return(1);
+
+ if (sbspace(&(so)->so_snd) >= (so)->so_snd.sb_lowat) {
+ if (so->so_flags & SOF_NOTSENT_LOWAT) {
+ if ((SOCK_DOM(so) == PF_INET6 ||
+ SOCK_DOM(so) == PF_INET) &&
+ so->so_type == SOCK_STREAM) {
+ return (tcp_notsent_lowat_check(so));
+ }
+#if MPTCP
+ else if ((SOCK_DOM(so) == PF_MULTIPATH) &&
+ (SOCK_PROTO(so) == IPPROTO_TCP)) {
+ return (mptcp_notsent_lowat_check(so));
+ }
+#endif
+ else {
+ return (1);
+ }
+ } else {
+ return (1);
+ }
+ }
+ return (0);
}
/* adjust counters in sb reflecting allocation of m */
void
sballoc(struct sockbuf *sb, struct mbuf *m)
{
- sb->sb_cc += m->m_len;
- sb->sb_mbcnt += MSIZE;
- if (m->m_flags & M_EXT)
- sb->sb_mbcnt += m->m_ext.ext_size;
+ u_int32_t cnt = 1;
+ sb->sb_cc += m->m_len;
+ if (m->m_type != MT_DATA && m->m_type != MT_HEADER &&
+ m->m_type != MT_OOBDATA)
+ sb->sb_ctl += m->m_len;
+ sb->sb_mbcnt += MSIZE;
+
+ if (m->m_flags & M_EXT) {
+ sb->sb_mbcnt += m->m_ext.ext_size;
+ cnt += (m->m_ext.ext_size >> MSIZESHIFT);
+ }
+ OSAddAtomic(cnt, &total_sbmb_cnt);
+ VERIFY(total_sbmb_cnt > 0);
+ if (total_sbmb_cnt > total_sbmb_cnt_peak)
+ total_sbmb_cnt_peak = total_sbmb_cnt;
+
+ /*
+ * If data is being appended to the send socket buffer,
+ * update the send byte count
+ */
+ if (!(sb->sb_flags & SB_RECV))
+ OSAddAtomic(cnt, &total_snd_byte_count);
}
/* adjust counters in sb reflecting freeing of m */
void
sbfree(struct sockbuf *sb, struct mbuf *m)
{
- sb->sb_cc -= m->m_len;
- sb->sb_mbcnt -= MSIZE;
- if (m->m_flags & M_EXT)
- sb->sb_mbcnt -= m->m_ext.ext_size;
+ int cnt = -1;
+
+ sb->sb_cc -= m->m_len;
+ if (m->m_type != MT_DATA && m->m_type != MT_HEADER &&
+ m->m_type != MT_OOBDATA)
+ sb->sb_ctl -= m->m_len;
+ sb->sb_mbcnt -= MSIZE;
+ if (m->m_flags & M_EXT) {
+ sb->sb_mbcnt -= m->m_ext.ext_size;
+ cnt -= (m->m_ext.ext_size >> MSIZESHIFT);
+ }
+ OSAddAtomic(cnt, &total_sbmb_cnt);
+ VERIFY(total_sbmb_cnt >= 0);
+
+ /*
+ * If data is being removed from the send socket buffer,
+ * update the send byte count
+ */
+ if (!(sb->sb_flags & SB_RECV)) {
+ OSAddAtomic(cnt, &total_snd_byte_count);
+ }
}
/*
* Returns error without lock if sleep is interrupted.
*/
int
-sblock(struct sockbuf *sb, int wf)
+sblock(struct sockbuf *sb, uint32_t flags)
{
- return(sb->sb_flags & SB_LOCK ?
- ((wf == M_WAIT) ? sb_lock(sb) : EWOULDBLOCK) :
- (sb->sb_flags |= SB_LOCK), 0);
+ boolean_t nointr = ((sb->sb_flags & SB_NOINTR) || (flags & SBL_NOINTR));
+ void *lr_saved = __builtin_return_address(0);
+ struct socket *so = sb->sb_so;
+ void * wchan;
+ int error = 0;
+ thread_t tp = current_thread();
+
+ VERIFY((flags & SBL_VALID) == flags);
+
+ /* so_usecount may be 0 if we get here from sofreelastref() */
+ if (so == NULL) {
+ panic("%s: null so, sb=%p sb_flags=0x%x lr=%p\n",
+ __func__, sb, sb->sb_flags, lr_saved);
+ /* NOTREACHED */
+ } else if (so->so_usecount < 0) {
+ panic("%s: sb=%p sb_flags=0x%x sb_so=%p usecount=%d lr=%p "
+ "lrh= %s\n", __func__, sb, sb->sb_flags, so,
+ so->so_usecount, lr_saved, solockhistory_nr(so));
+ /* NOTREACHED */
+ }
+
+ /*
+ * The content filter thread must hold the sockbuf lock
+ */
+ if ((so->so_flags & SOF_CONTENT_FILTER) && sb->sb_cfil_thread == tp) {
+ /*
+ * Don't panic if we are defunct because SB_LOCK has
+ * been cleared by sodefunct()
+ */
+ if (!(so->so_flags & SOF_DEFUNCT) && !(sb->sb_flags & SB_LOCK))
+ panic("%s: SB_LOCK not held for %p\n",
+ __func__, sb);
+
+ /* Keep the sockbuf locked */
+ return (0);
+ }
+
+ if ((sb->sb_flags & SB_LOCK) && !(flags & SBL_WAIT))
+ return (EWOULDBLOCK);
+ /*
+ * We may get here from sorflush(), in which case "sb" may not
+ * point to the real socket buffer. Use the actual socket buffer
+ * address from the socket instead.
+ */
+ wchan = (sb->sb_flags & SB_RECV) ?
+ &so->so_rcv.sb_flags : &so->so_snd.sb_flags;
+
+ /*
+ * A content filter thread has exclusive access to the sockbuf
+ * until it clears the
+ */
+ while ((sb->sb_flags & SB_LOCK) ||
+ ((so->so_flags & SOF_CONTENT_FILTER) &&
+ sb->sb_cfil_thread != NULL)) {
+ lck_mtx_t *mutex_held;
+
+ /*
+ * XXX: This code should be moved up above outside of this loop;
+ * however, we may get here as part of sofreelastref(), and
+ * at that time pr_getlock() may no longer be able to return
+ * us the lock. This will be fixed in future.
+ */
+ if (so->so_proto->pr_getlock != NULL)
+ mutex_held = (*so->so_proto->pr_getlock)(so, 0);
+ else
+ mutex_held = so->so_proto->pr_domain->dom_mtx;
+
+ lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED);
+
+ sb->sb_wantlock++;
+ VERIFY(sb->sb_wantlock != 0);
+
+ error = msleep(wchan, mutex_held,
+ nointr ? PSOCK : PSOCK | PCATCH,
+ nointr ? "sb_lock_nointr" : "sb_lock", NULL);
+
+ VERIFY(sb->sb_wantlock != 0);
+ sb->sb_wantlock--;
+
+ if (error == 0 && (so->so_flags & SOF_DEFUNCT) &&
+ !(flags & SBL_IGNDEFUNCT)) {
+ error = EBADF;
+ SODEFUNCTLOG(("%s[%d]: defunct so 0x%llx [%d,%d] "
+ "(%d)\n", __func__, proc_selfpid(),
+ (uint64_t)VM_KERNEL_ADDRPERM(so),
+ SOCK_DOM(so), SOCK_TYPE(so), error));
+ }
+
+ if (error != 0)
+ return (error);
+ }
+ sb->sb_flags |= SB_LOCK;
+ return (0);
}
-/* release lock on sockbuf sb */
+/*
+ * Release lock on sockbuf sb
+ */
void
-sbunlock(struct sockbuf *sb, int keeplocked)
+sbunlock(struct sockbuf *sb, boolean_t keeplocked)
{
+ void *lr_saved = __builtin_return_address(0);
struct socket *so = sb->sb_so;
- int lr, lr_saved;
- lck_mtx_t *mutex_held;
+ thread_t tp = current_thread();
+
+ /* so_usecount may be 0 if we get here from sofreelastref() */
+ if (so == NULL) {
+ panic("%s: null so, sb=%p sb_flags=0x%x lr=%p\n",
+ __func__, sb, sb->sb_flags, lr_saved);
+ /* NOTREACHED */
+ } else if (so->so_usecount < 0) {
+ panic("%s: sb=%p sb_flags=0x%x sb_so=%p usecount=%d lr=%p "
+ "lrh= %s\n", __func__, sb, sb->sb_flags, so,
+ so->so_usecount, lr_saved, solockhistory_nr(so));
+ /* NOTREACHED */
+ }
-#ifdef __ppc__
- __asm__ volatile("mflr %0" : "=r" (lr));
- lr_saved = lr;
-#endif
- sb->sb_flags &= ~SB_LOCK;
+ /*
+ * The content filter thread must hold the sockbuf lock
+ */
+ if ((so->so_flags & SOF_CONTENT_FILTER) && sb->sb_cfil_thread == tp) {
+ /*
+ * Don't panic if we are defunct because SB_LOCK has
+ * been cleared by sodefunct()
+ */
+ if (!(so->so_flags & SOF_DEFUNCT) &&
+ !(sb->sb_flags & SB_LOCK) &&
+ !(so->so_state & SS_DEFUNCT) &&
+ !(so->so_flags1 & SOF1_DEFUNCTINPROG)) {
+ panic("%s: SB_LOCK not held for %p\n",
+ __func__, sb);
+ }
+ /* Keep the sockbuf locked and proceed */
+ } else {
+ VERIFY((sb->sb_flags & SB_LOCK) ||
+ (so->so_state & SS_DEFUNCT) ||
+ (so->so_flags1 & SOF1_DEFUNCTINPROG));
+
+ sb->sb_flags &= ~SB_LOCK;
+
+ if (sb->sb_wantlock > 0) {
+ /*
+ * We may get here from sorflush(), in which case "sb"
+ * may not point to the real socket buffer. Use the
+ * actual socket buffer address from the socket instead.
+ */
+ wakeup((sb->sb_flags & SB_RECV) ? &so->so_rcv.sb_flags :
+ &so->so_snd.sb_flags);
+ }
+ }
- if (so->so_proto->pr_getlock != NULL)
- mutex_held = (*so->so_proto->pr_getlock)(so, 0);
- else
- mutex_held = so->so_proto->pr_domain->dom_mtx;
+ if (!keeplocked) { /* unlock on exit */
+ lck_mtx_t *mutex_held;
- if (keeplocked == 0)
- lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED);
+ if (so->so_proto->pr_getlock != NULL)
+ mutex_held = (*so->so_proto->pr_getlock)(so, 0);
+ else
+ mutex_held = so->so_proto->pr_domain->dom_mtx;
- if (sb->sb_flags & SB_WANT) {
- sb->sb_flags &= ~SB_WANT;
- if (so->so_usecount < 0)
- panic("sbunlock: b4 wakeup so=%x ref=%d lr=%x sb_flags=%x\n", sb->sb_so, so->so_usecount, lr_saved, sb->sb_flags);
+ lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED);
- wakeup((caddr_t)&(sb)->sb_flags);
- }
- if (keeplocked == 0) { /* unlock on exit */
+ VERIFY(so->so_usecount != 0);
so->so_usecount--;
- if (so->so_usecount < 0)
- panic("sbunlock: unlock on exit so=%x lr=%x sb_flags=%x\n", so, so->so_usecount,lr_saved, sb->sb_flags);
- so->reserved4= lr_saved;
+ so->unlock_lr[so->next_unlock_lr] = lr_saved;
+ so->next_unlock_lr = (so->next_unlock_lr + 1) % SO_LCKDBG_MAX;
lck_mtx_unlock(mutex_held);
}
}
void
-sorwakeup(struct socket * so)
+sorwakeup(struct socket *so)
+{
+ if (sb_notify(&so->so_rcv))
+ sowakeup(so, &so->so_rcv);
+}
+
+void
+sowwakeup(struct socket *so)
{
- if (sb_notify(&so->so_rcv))
- sowakeup(so, &so->so_rcv);
+ if (sb_notify(&so->so_snd))
+ sowakeup(so, &so->so_snd);
}
void
-sowwakeup(struct socket * so)
+soevent(struct socket *so, long hint)
{
- if (sb_notify(&so->so_snd))
- sowakeup(so, &so->so_snd);
+ if (so->so_flags & SOF_KNOTE)
+ KNOTE(&so->so_klist, hint);
+
+ soevupcall(so, hint);
+
+ /*
+ * Don't post an event if this a subflow socket or
+ * the app has opted out of using cellular interface
+ */
+ if ((hint & SO_FILT_HINT_IFDENIED) &&
+ !(so->so_flags & SOF_MP_SUBFLOW) &&
+ !(so->so_restrictions & SO_RESTRICT_DENY_CELLULAR) &&
+ !(so->so_restrictions & SO_RESTRICT_DENY_EXPENSIVE))
+ soevent_ifdenied(so);
+}
+
+void
+soevupcall(struct socket *so, u_int32_t hint)
+{
+ if (so->so_event != NULL) {
+ caddr_t so_eventarg = so->so_eventarg;
+ int locked = hint & SO_FILT_HINT_LOCKED;
+
+ hint &= so->so_eventmask;
+ if (hint != 0) {
+ if (locked)
+ socket_unlock(so, 0);
+
+ so->so_event(so, so_eventarg, hint);
+
+ if (locked)
+ socket_lock(so, 0);
+ }
+ }
+}
+
+static void
+soevent_ifdenied(struct socket *so)
+{
+ struct kev_netpolicy_ifdenied ev_ifdenied;
+
+ bzero(&ev_ifdenied, sizeof (ev_ifdenied));
+ /*
+ * The event consumer is interested about the effective {upid,pid,uuid}
+ * info which can be different than the those related to the process
+ * that recently performed a system call on the socket, i.e. when the
+ * socket is delegated.
+ */
+ if (so->so_flags & SOF_DELEGATED) {
+ ev_ifdenied.ev_data.eupid = so->e_upid;
+ ev_ifdenied.ev_data.epid = so->e_pid;
+ uuid_copy(ev_ifdenied.ev_data.euuid, so->e_uuid);
+ } else {
+ ev_ifdenied.ev_data.eupid = so->last_upid;
+ ev_ifdenied.ev_data.epid = so->last_pid;
+ uuid_copy(ev_ifdenied.ev_data.euuid, so->last_uuid);
+ }
+
+ if (++so->so_ifdenied_notifies > 1) {
+ /*
+ * Allow for at most one kernel event to be generated per
+ * socket; so_ifdenied_notifies is reset upon changes in
+ * the UUID policy. See comments in inp_update_policy.
+ */
+ if (net_io_policy_log) {
+ uuid_string_t buf;
+
+ uuid_unparse(ev_ifdenied.ev_data.euuid, buf);
+ log(LOG_DEBUG, "%s[%d]: so 0x%llx [%d,%d] epid %d "
+ "euuid %s%s has %d redundant events supressed\n",
+ __func__, so->last_pid,
+ (uint64_t)VM_KERNEL_ADDRPERM(so), SOCK_DOM(so),
+ SOCK_TYPE(so), ev_ifdenied.ev_data.epid, buf,
+ ((so->so_flags & SOF_DELEGATED) ?
+ " [delegated]" : ""), so->so_ifdenied_notifies);
+ }
+ } else {
+ if (net_io_policy_log) {
+ uuid_string_t buf;
+
+ uuid_unparse(ev_ifdenied.ev_data.euuid, buf);
+ log(LOG_DEBUG, "%s[%d]: so 0x%llx [%d,%d] epid %d "
+ "euuid %s%s event posted\n", __func__,
+ so->last_pid, (uint64_t)VM_KERNEL_ADDRPERM(so),
+ SOCK_DOM(so), SOCK_TYPE(so),
+ ev_ifdenied.ev_data.epid, buf,
+ ((so->so_flags & SOF_DELEGATED) ?
+ " [delegated]" : ""));
+ }
+ netpolicy_post_msg(KEV_NETPOLICY_IFDENIED, &ev_ifdenied.ev_data,
+ sizeof (ev_ifdenied));
+ }
}
-#endif __APPLE__
/*
* Make a copy of a sockaddr in a malloced buffer of type M_SONAME.
*/
struct sockaddr *
-dup_sockaddr(sa, canwait)
- struct sockaddr *sa;
- int canwait;
+dup_sockaddr(struct sockaddr *sa, int canwait)
{
struct sockaddr *sa2;
- MALLOC(sa2, struct sockaddr *, sa->sa_len, M_SONAME,
- canwait ? M_WAITOK : M_NOWAIT);
+ MALLOC(sa2, struct sockaddr *, sa->sa_len, M_SONAME,
+ canwait ? M_WAITOK : M_NOWAIT);
if (sa2)
bcopy(sa, sa2, sa->sa_len);
- return sa2;
+ return (sa2);
}
/*
void
sotoxsocket(struct socket *so, struct xsocket *xso)
{
- xso->xso_len = sizeof *xso;
- xso->xso_so = so;
+ xso->xso_len = sizeof (*xso);
+ xso->xso_so = (_XSOCKET_PTR(struct socket *))VM_KERNEL_ADDRPERM(so);
xso->so_type = so->so_type;
- xso->so_options = so->so_options;
+ xso->so_options = (short)(so->so_options & 0xffff);
xso->so_linger = so->so_linger;
xso->so_state = so->so_state;
- xso->so_pcb = so->so_pcb;
+ xso->so_pcb = (_XSOCKET_PTR(caddr_t))VM_KERNEL_ADDRPERM(so->so_pcb);
if (so->so_proto) {
- xso->xso_protocol = so->so_proto->pr_protocol;
- xso->xso_family = so->so_proto->pr_domain->dom_family;
+ xso->xso_protocol = SOCK_PROTO(so);
+ xso->xso_family = SOCK_DOM(so);
+ } else {
+ xso->xso_protocol = xso->xso_family = 0;
}
- else
+ xso->so_qlen = so->so_qlen;
+ xso->so_incqlen = so->so_incqlen;
+ xso->so_qlimit = so->so_qlimit;
+ xso->so_timeo = so->so_timeo;
+ xso->so_error = so->so_error;
+ xso->so_pgid = so->so_pgid;
+ xso->so_oobmark = so->so_oobmark;
+ sbtoxsockbuf(&so->so_snd, &xso->so_snd);
+ sbtoxsockbuf(&so->so_rcv, &xso->so_rcv);
+ xso->so_uid = kauth_cred_getuid(so->so_cred);
+}
+
+
+
+void
+sotoxsocket64(struct socket *so, struct xsocket64 *xso)
+{
+ xso->xso_len = sizeof (*xso);
+ xso->xso_so = (u_int64_t)VM_KERNEL_ADDRPERM(so);
+ xso->so_type = so->so_type;
+ xso->so_options = (short)(so->so_options & 0xffff);
+ xso->so_linger = so->so_linger;
+ xso->so_state = so->so_state;
+ xso->so_pcb = (u_int64_t)VM_KERNEL_ADDRPERM(so->so_pcb);
+ if (so->so_proto) {
+ xso->xso_protocol = SOCK_PROTO(so);
+ xso->xso_family = SOCK_DOM(so);
+ } else {
xso->xso_protocol = xso->xso_family = 0;
+ }
xso->so_qlen = so->so_qlen;
xso->so_incqlen = so->so_incqlen;
xso->so_qlimit = so->so_qlimit;
xso->so_oobmark = so->so_oobmark;
sbtoxsockbuf(&so->so_snd, &xso->so_snd);
sbtoxsockbuf(&so->so_rcv, &xso->so_rcv);
- xso->so_uid = so->so_uid;
+ xso->so_uid = kauth_cred_getuid(so->so_cred);
}
+
/*
* This does the same for sockbufs. Note that the xsockbuf structure,
* since it is always embedded in a socket, does not include a self
xsb->sb_mbmax = sb->sb_mbmax;
xsb->sb_lowat = sb->sb_lowat;
xsb->sb_flags = sb->sb_flags;
- xsb->sb_timeo = (u_long)(sb->sb_timeo.tv_sec * hz) + sb->sb_timeo.tv_usec / tick;
+ xsb->sb_timeo = (short)
+ (sb->sb_timeo.tv_sec * hz) + sb->sb_timeo.tv_usec / tick;
if (xsb->sb_timeo == 0 && sb->sb_timeo.tv_usec != 0)
xsb->sb_timeo = 1;
}
+/*
+ * Based on the policy set by an all knowing decison maker, throttle sockets
+ * that either have been marked as belonging to "background" process.
+ */
+inline int
+soisthrottled(struct socket *so)
+{
+ /*
+ * On non-embedded, we rely on implicit throttling by the
+ * application, as we're missing the system wide "decision maker"
+ */
+ return (
+ (so->so_traffic_mgt_flags & TRAFFIC_MGT_SO_BACKGROUND));
+}
+
+inline int
+soisprivilegedtraffic(struct socket *so)
+{
+ return ((so->so_flags & SOF_PRIVILEGED_TRAFFIC_CLASS) ? 1 : 0);
+}
+
+inline int
+soissrcbackground(struct socket *so)
+{
+ return ((so->so_traffic_mgt_flags & TRAFFIC_MGT_SO_BACKGROUND) ||
+ IS_SO_TC_BACKGROUND(so->so_traffic_class));
+}
+
+inline int
+soissrcrealtime(struct socket *so)
+{
+ return (so->so_traffic_class >= SO_TC_AV &&
+ so->so_traffic_class <= SO_TC_VO);
+}
+
+inline int
+soissrcbesteffort(struct socket *so)
+{
+ return (so->so_traffic_class == SO_TC_BE ||
+ so->so_traffic_class == SO_TC_RD ||
+ so->so_traffic_class == SO_TC_OAM);
+}
+
+void
+sonullevent(struct socket *so, void *arg, uint32_t hint)
+{
+#pragma unused(so, arg, hint)
+}
+
/*
* Here is the definition of some of the basic objects in the kern.ipc
* branch of the MIB.
*/
-SYSCTL_NODE(_kern, KERN_IPC, ipc, CTLFLAG_RW, 0, "IPC");
+SYSCTL_NODE(_kern, KERN_IPC, ipc,
+ CTLFLAG_RW|CTLFLAG_LOCKED|CTLFLAG_ANYBODY, 0, "IPC");
+
+/* Check that the maximum socket buffer size is within a range */
+
+static int
+sysctl_sb_max SYSCTL_HANDLER_ARGS
+{
+#pragma unused(oidp, arg1, arg2)
+ u_int32_t new_value;
+ int changed = 0;
+ int error = sysctl_io_number(req, sb_max, sizeof (u_int32_t),
+ &new_value, &changed);
+ if (!error && changed) {
+ if (new_value > LOW_SB_MAX && new_value <= high_sb_max) {
+ sb_max = new_value;
+ } else {
+ error = ERANGE;
+ }
+ }
+ return (error);
+}
+
+static int
+sysctl_io_policy_throttled SYSCTL_HANDLER_ARGS
+{
+#pragma unused(arg1, arg2)
+ int i, err;
+
+ i = net_io_policy_throttled;
+
+ err = sysctl_handle_int(oidp, &i, 0, req);
+ if (err != 0 || req->newptr == USER_ADDR_NULL)
+ return (err);
+
+ if (i != net_io_policy_throttled)
+ SOTHROTTLELOG(("throttle: network IO policy throttling is "
+ "now %s\n", i ? "ON" : "OFF"));
+
+ net_io_policy_throttled = i;
+
+ return (err);
+}
+
+SYSCTL_PROC(_kern_ipc, KIPC_MAXSOCKBUF, maxsockbuf,
+ CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
+ &sb_max, 0, &sysctl_sb_max, "IU", "Maximum socket buffer size");
+
+SYSCTL_INT(_kern_ipc, KIPC_SOCKBUF_WASTE, sockbuf_waste_factor,
+ CTLFLAG_RW | CTLFLAG_LOCKED, &sb_efficiency, 0, "");
+
+SYSCTL_INT(_kern_ipc, KIPC_NMBCLUSTERS, nmbclusters,
+ CTLFLAG_RD | CTLFLAG_LOCKED, &nmbclusters, 0, "");
+
+SYSCTL_INT(_kern_ipc, OID_AUTO, njcl,
+ CTLFLAG_RD | CTLFLAG_LOCKED, &njcl, 0, "");
+
+SYSCTL_INT(_kern_ipc, OID_AUTO, njclbytes,
+ CTLFLAG_RD | CTLFLAG_LOCKED, &njclbytes, 0, "");
+
+SYSCTL_INT(_kern_ipc, KIPC_SOQLIMITCOMPAT, soqlimitcompat,
+ CTLFLAG_RW | CTLFLAG_LOCKED, &soqlimitcompat, 1,
+ "Enable socket queue limit compatibility");
+
+SYSCTL_INT(_kern_ipc, OID_AUTO, soqlencomp, CTLFLAG_RW | CTLFLAG_LOCKED,
+ &soqlencomp, 0, "Listen backlog represents only complete queue");
+
+SYSCTL_NODE(_kern_ipc, OID_AUTO, io_policy, CTLFLAG_RW, 0, "network IO policy");
-/* This takes the place of kern.maxsockbuf, which moved to kern.ipc. */
-static int dummy;
-SYSCTL_INT(_kern, KERN_DUMMY, dummy, CTLFLAG_RW, &dummy, 0, "");
+SYSCTL_PROC(_kern_ipc_io_policy, OID_AUTO, throttled,
+ CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, &net_io_policy_throttled, 0,
+ sysctl_io_policy_throttled, "I", "");
-SYSCTL_INT(_kern_ipc, KIPC_MAXSOCKBUF, maxsockbuf, CTLFLAG_RW,
- &sb_max, 0, "Maximum socket buffer size");
-SYSCTL_INT(_kern_ipc, OID_AUTO, maxsockets, CTLFLAG_RD,
- &maxsockets, 0, "Maximum number of sockets avaliable");
-SYSCTL_INT(_kern_ipc, KIPC_SOCKBUF_WASTE, sockbuf_waste_factor, CTLFLAG_RW,
- &sb_efficiency, 0, "");
-SYSCTL_INT(_kern_ipc, KIPC_NMBCLUSTERS, nmbclusters, CTLFLAG_RD, &nmbclusters, 0, "");
+SYSCTL_INT(_kern_ipc_io_policy, OID_AUTO, log, CTLFLAG_RW | CTLFLAG_LOCKED,
+ &net_io_policy_log, 0, "");
+#if CONFIG_PROC_UUID_POLICY
+SYSCTL_INT(_kern_ipc_io_policy, OID_AUTO, uuid, CTLFLAG_RW | CTLFLAG_LOCKED,
+ &net_io_policy_uuid, 0, "");
+#endif /* CONFIG_PROC_UUID_POLICY */
projects / apple / xnu.git / blobdiff