X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/9bccf70c0258c7cac2dcb80011b2a964d884c552..935ed37a5c468c8a1c07408573c08b8b7ef80e8b:/bsd/kern/uipc_socket2.c diff --git a/bsd/kern/uipc_socket2.c b/bsd/kern/uipc_socket2.c index ae6a6cc9d..41a606ca3 100644 --- a/bsd/kern/uipc_socket2.c +++ b/bsd/kern/uipc_socket2.c @@ -1,25 +1,30 @@ /* - * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. + * Copyright (c) 1998-2007 Apple Inc. All rights reserved. * - * @APPLE_LICENSE_HEADER_START@ + * @APPLE_OSREFERENCE_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 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. * - * This Original Code and all software distributed under the License are - * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER + * 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. + * 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_LICENSE_HEADER_END@ + * @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 @@ -56,12 +61,19 @@ * @(#)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 #include #include #include -#include +#include +#include #include #include #include @@ -71,20 +83,42 @@ #include #include #include - +#include +#include +#include +#include #include +#include + +#if CONFIG_MACF +#include +#endif + +/* TODO: this should be in a header file somewhere */ +extern void postevent(struct socket *, struct sockbuf *, int); #define DBG_FNC_SBDROP NETDBG_CODE(DBG_NETSOCK, 4) #define DBG_FNC_SBAPPEND NETDBG_CODE(DBG_NETSOCK, 5) +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 *); /* * Primitive routines for operating on sockets and socket buffers */ +static int soqlimitcompat = 1; +static int soqlencomp = 0; u_long sb_max = SB_MAX; /* XXX should be static */ static u_long sb_efficiency = 8; /* parameter for sbreserve() */ +__private_extern__ unsigned int total_mb_cnt = 0; +__private_extern__ unsigned int total_cl_cnt = 0; +__private_extern__ int sbspace_factor = 8; /* * Procedures to manipulate state flags of socket @@ -115,45 +149,45 @@ static u_long sb_efficiency = 8; /* parameter for sbreserve() */ * the kernel, the wakeups done here will sometimes * 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; - struct kextcb *kp; - - kp = sotokextcb(so); - while (kp) { - if (kp->e_soif && kp->e_soif->sf_soisconnected) { - if ((*kp->e_soif->sf_soisconnected)(so, kp)) - return; - } - kp = kp->e_next; - } so->so_state &= ~(SS_ISCONNECTING|SS_ISDISCONNECTING|SS_ISCONFIRMING); so->so_state |= SS_ISCONNECTED; + + sflt_notify(so, sock_evt_connected, NULL); + if (head && (so->so_state & SS_INCOMP)) { - postevent(head,0,EV_RCONN); + 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(&head->so_timeo); + wakeup_one((caddr_t)&head->so_timeo); + if (head->so_proto->pr_getlock != NULL) { + socket_unlock(head, 1); + socket_lock(so, 0); + } } else { - postevent(so,0,EV_WCONN); + postevent(so, 0, EV_WCONN); wakeup((caddr_t)&so->so_timeo); sorwakeup(so); sowwakeup(so); @@ -161,93 +195,27 @@ soisconnected(so) } void -soisdisconnecting(so) - register struct socket *so; +soisdisconnecting(struct socket *so) { - register struct kextcb *kp; - - kp = sotokextcb(so); - while (kp) { - if (kp->e_soif && kp->e_soif->sf_soisdisconnecting) { - if ((*kp->e_soif->sf_soisdisconnecting)(so, kp)) - return; - } - kp = kp->e_next; - } - so->so_state &= ~SS_ISCONNECTING; so->so_state |= (SS_ISDISCONNECTING|SS_CANTRCVMORE|SS_CANTSENDMORE); + sflt_notify(so, sock_evt_disconnecting, NULL); wakeup((caddr_t)&so->so_timeo); sowwakeup(so); sorwakeup(so); } void -soisdisconnected(so) - register struct socket *so; +soisdisconnected(struct socket *so) { - register struct kextcb *kp; - - kp = sotokextcb(so); - while (kp) { - if (kp->e_soif && kp->e_soif->sf_soisdisconnected) { - if ((*kp->e_soif->sf_soisdisconnected)(so, kp)) - return; - } - kp = kp->e_next; - } - so->so_state &= ~(SS_ISCONNECTING|SS_ISCONNECTED|SS_ISDISCONNECTING); so->so_state |= (SS_CANTRCVMORE|SS_CANTSENDMORE|SS_ISDISCONNECTED); + sflt_notify(so, sock_evt_disconnected, NULL); wakeup((caddr_t)&so->so_timeo); sowwakeup(so); sorwakeup(so); } -/* - * 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. - */ -struct socket * -sodropablereq(head) - register struct socket *head; -{ - register struct socket *so; - 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 (so); - - qlen = head->so_incqlen; - if (++cur_cnt > qlen || old_cnt > qlen) { - rnd = (314159 * rnd + 66329) & 0xffff; - j = ((qlen + 1) * rnd) >> 16; - - while (j-- && so) - so = TAILQ_NEXT(so, so_list); - } - - return (so); -} - /* * When an attempt at a new connection is noted on a socket * which accepts connections, sonewconn is called. If the @@ -256,24 +224,50 @@ sodropablereq(head) * data structure of the original socket, and return this. * Connstatus may be 0, or SO_ISCONFIRMING, or SO_ISCONNECTED. */ -struct socket * -sonewconn(head, connstatus) - register struct socket *head; - int connstatus; +static struct socket * +sonewconn_internal(struct socket *head, int connstatus) { - int error = 0; - register struct socket *so; - register struct kextcb *kp; + int so_qlen, error = 0; + struct socket *so; + lck_mtx_t *mutex_held; - if (head->so_qlen > 3 * head->so_qlimit / 2) + if (head->so_proto->pr_getlock != NULL) + mutex_held = (*head->so_proto->pr_getlock)(head, 0); + else + mutex_held = head->so_proto->pr_domain->dom_mtx; + lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED); + + 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(M_NOWAIT, head->so_proto->pr_domain->dom_family, + 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; @@ -285,36 +279,43 @@ sonewconn(head, connstatus) so->so_timeo = head->so_timeo; so->so_pgid = head->so_pgid; so->so_uid = head->so_uid; + so->so_flags = head->so_flags & (SOF_REUSESHAREUID|SOF_NOTIFYCONFLICT); /* inherit SO_REUSESHAREUID and SO_NOTIFYCONFLICT ocket options */ + so->so_usecount = 1; + so->next_lock_lr = 0; + so->next_unlock_lr = 0; - /* Attach socket filters for this protocol */ - if (so->so_proto->pr_sfilter.tqh_first) - error = sfilter_init(so); - if (error != 0) { +#ifdef __APPLE__ + so->so_rcv.sb_flags |= SB_RECV; /* XXX */ + so->so_rcv.sb_so = so->so_snd.sb_so = so; + TAILQ_INIT(&so->so_evlist); +#endif + +#if CONFIG_MACF_SOCKET + mac_socket_label_associate_accept(head, so); +#endif + + if (soreserve(so, head->so_snd.sb_hiwat, head->so_rcv.sb_hiwat)) { + sflt_termsock(so); sodealloc(so); return ((struct socket *)0); } - /* Call socket filters' sonewconn1 function if set */ - kp = sotokextcb(so); - while (kp) { - if (kp->e_soif && kp->e_soif->sf_sonewconn) { - error = (int)(*kp->e_soif->sf_sonewconn)(so, connstatus, kp); - if (error == EJUSTRETURN) { - return so; - } else if (error != 0) { - sodealloc(so); - return NULL; - } - } - kp = kp->e_next; - } - - if (soreserve(so, head->so_snd.sb_hiwat, head->so_rcv.sb_hiwat) || - (*so->so_proto->pr_usrreqs->pru_attach)(so, 0, NULL)) { - sfilter_term(so); + /* + * Must be done with head unlocked to avoid deadlock + * for protocol with per socket mutexes. + */ + if (head->so_proto->pr_unlock) + socket_unlock(head, 0); + if (((*so->so_proto->pr_usrreqs->pru_attach)(so, 0, NULL) != 0) || + error) { + sflt_termsock(so); sodealloc(so); + if (head->so_proto->pr_unlock) + socket_lock(head, 0); return ((struct socket *)0); } + if (head->so_proto->pr_unlock) + socket_lock(head, 0); #ifdef __APPLE__ so->so_proto->pr_domain->dom_refs++; #endif @@ -328,18 +329,52 @@ sonewconn(head, connstatus) head->so_incqlen++; } head->so_qlen++; + +#ifdef __APPLE__ + /* Attach socket filters for this protocol */ + sflt_initsock(so); +#endif + if (connstatus) { + so->so_state |= connstatus; sorwakeup(head); wakeup((caddr_t)&head->so_timeo); - so->so_state |= connstatus; } -#ifdef __APPLE__ - so->so_rcv.sb_so = so->so_snd.sb_so = so; - TAILQ_INIT(&so->so_evlist); -#endif return (so); } + +struct socket * +sonewconn(struct socket *head, int connstatus, const struct sockaddr *from) +{ + int error = 0; + struct socket_filter_entry *filter; + int filtered = 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); + } + + if (error) { + return (NULL); + } + + return (sonewconn_internal(head, connstatus)); +} + /* * Socantsendmore indicates that no more data will be sent on the * socket; it would normally be applied to a socket when the user @@ -351,74 +386,97 @@ sonewconn(head, connstatus) */ void -socantsendmore(so) - struct socket *so; +socantsendmore(struct socket *so) { - register struct kextcb *kp; - - kp = sotokextcb(so); - while (kp) { - if (kp->e_soif && kp->e_soif->sf_socantsendmore) { - if ((*kp->e_soif->sf_socantsendmore)(so, kp)) - return; - } - kp = kp->e_next; - } - - so->so_state |= SS_CANTSENDMORE; + sflt_notify(so, sock_evt_cantsendmore, NULL); sowwakeup(so); } void -socantrcvmore(so) - struct socket *so; +socantrcvmore(struct socket *so) { - register struct kextcb *kp; - - kp = sotokextcb(so); - while (kp) { - if (kp->e_soif && kp->e_soif->sf_socantrcvmore) { - if ((*kp->e_soif->sf_socantrcvmore)(so, kp)) - return; - } - kp = kp->e_next; - } - - so->so_state |= SS_CANTRCVMORE; + sflt_notify(so, sock_evt_cantrecvmore, NULL); sorwakeup(so); } /* * Wait for data to arrive at/drain from a socket buffer. + * + * Returns: 0 Success + * EBADF + * msleep:EINTR */ int -sbwait(sb) - struct sockbuf *sb; +sbwait(struct sockbuf *sb) { + int error = 0, lr_saved; + struct socket *so = sb->sb_so; + lck_mtx_t *mutex_held; + struct timespec ts; + + lr_saved = (unsigned int) __builtin_return_address(0); + + 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; sb->sb_flags |= SB_WAIT; - return (tsleep((caddr_t)&sb->sb_cc, - (sb->sb_flags & SB_NOINTR) ? PSOCK : PSOCK | PCATCH, "sbwait", - sb->sb_timeo)); + + if (so->so_usecount < 1) + panic("sbwait: so=%p refcount=%d\n", so, so->so_usecount); + ts.tv_sec = sb->sb_timeo.tv_sec; + ts.tv_nsec = sb->sb_timeo.tv_usec * 1000; + error = msleep((caddr_t)&sb->sb_cc, mutex_held, + (sb->sb_flags & SB_NOINTR) ? PSOCK : PSOCK | PCATCH, "sbwait", &ts); + + lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED); + + if (so->so_usecount < 1) + panic("sbwait: so=%p refcount=%d\n", so, so->so_usecount); + + if ((so->so_state & SS_DRAINING)) { + error = EBADF; + } + + return (error); } /* * Lock a sockbuf already known to be locked; * return any error returned from sleep (EINTR). + * + * Returns: 0 Success + * EINTR */ int -sb_lock(sb) - register struct sockbuf *sb; +sb_lock(struct sockbuf *sb) { - int error; + struct socket *so = sb->sb_so; + lck_mtx_t *mutex_held; + int error = 0; + + if (so == NULL) + panic("sb_lock: null so back pointer sb=%p\n", sb); while (sb->sb_flags & SB_LOCK) { sb->sb_flags |= SB_WANT; - error = tsleep((caddr_t)&sb->sb_flags, - (sb->sb_flags & SB_NOINTR) ? PSOCK : PSOCK|PCATCH, - "sblock", 0); + 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=%p refcount=%d\n", so, + so->so_usecount); + + error = msleep((caddr_t)&sb->sb_flags, mutex_held, + (sb->sb_flags & SB_NOINTR) ? PSOCK : PSOCK | PCATCH, + "sb_lock", 0); + if (so->so_usecount < 1) + panic("sb_lock: 2 so=%p refcount=%d\n", so, + so->so_usecount); if (error) return (error); } @@ -432,13 +490,8 @@ sb_lock(sb) * if the socket has the SS_ASYNC flag set. */ void -sowakeup(so, sb) - register struct socket *so; - register struct sockbuf *sb; +sowakeup(struct socket *so, struct sockbuf *sb) { - struct proc *p = current_proc(); - /* We clear the flag before calling selwakeup. */ - /* BSD calls selwakeup then sets the flag */ sb->sb_flags &= ~SB_SEL; selwakeup(&sb->sb_sel); if (sb->sb_flags & SB_WAIT) { @@ -448,11 +501,30 @@ sowakeup(so, 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 (*so_upcall)(struct socket *, caddr_t, int); + caddr_t so_upcallarg; + + so_upcall = so->so_upcall; + so_upcallarg = so->so_upcallarg; + /* Let close know that we're about to do an upcall */ + so->so_flags |= SOF_UPCALLINUSE; + + socket_unlock(so, 0); + (*so_upcall)(so, so_upcallarg, M_DONTWAIT); + socket_lock(so, 0); + + so->so_flags &= ~SOF_UPCALLINUSE; + /* Tell close that it's safe to proceed */ + if (so->so_flags & SOF_CLOSEWAIT) + wakeup((caddr_t)&so->so_upcall); } - if (sb->sb_flags & SB_UPCALL) - (*so->so_upcall)(so, so->so_upcallarg, M_DONTWAIT); } /* @@ -487,21 +559,13 @@ sowakeup(so, sb) * 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_long sndcc, u_long rcvcc) { - register struct kextcb *kp; - - kp = sotokextcb(so); - while (kp) { - if (kp->e_soif && kp->e_soif->sf_soreserve) { - if ((*kp->e_soif->sf_soreserve)(so, sndcc, rcvcc, kp)) - return; - } - kp = kp->e_next; - } if (sbreserve(&so->so_snd, sndcc) == 0) goto bad; @@ -529,9 +593,7 @@ bad: * if buffering efficiency is near the normal case. */ int -sbreserve(sb, cc) - struct sockbuf *sb; - u_long cc; +sbreserve(struct sockbuf *sb, u_long cc) { if ((u_quad_t)cc > (u_quad_t)sb_max * MCLBYTES / (MSIZE + MCLBYTES)) return (0); @@ -545,16 +607,13 @@ sbreserve(sb, cc) /* * 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; - } /* @@ -588,113 +647,204 @@ sbrelease(sb) * the mbuf chain is recorded in sb. Empty mbufs are * discarded and mbufs are compacted where possible. */ -void -sbappend(sb, m) - struct sockbuf *sb; - struct mbuf *m; +int +sbappend(struct sockbuf *sb, struct mbuf *m) { - struct kextcb *kp; - register struct mbuf *n; + struct socket *so = sb->sb_so; + if (m == NULL || (sb->sb_flags & SB_DROP)) { + if (m != NULL) + m_freem(m); + return (0); + } - KERNEL_DEBUG((DBG_FNC_SBAPPEND | DBG_FUNC_START), sb, m->m_len, 0, 0, 0); + SBLASTRECORDCHK(sb, "sbappend 1"); - if (m == 0) - return; - kp = sotokextcb(sbtoso(sb)); - while (kp) { - if (kp->e_sout && kp->e_sout->su_sbappend) { - if ((*kp->e_sout->su_sbappend)(sb, m, kp)) - return; + if (sb->sb_lastrecord != NULL && (sb->sb_mbtail->m_flags & M_EOR)) + return (sbappendrecord(sb, m)); + + if (sb->sb_flags & SB_RECV) { + int error = sflt_data_in(so, NULL, &m, NULL, 0, NULL); + SBLASTRECORDCHK(sb, "sbappend 2"); + if (error != 0) { + if (error != EJUSTRETURN) + m_freem(m); + return (0); } - kp = kp->e_next; } - n = sb->sb_mb; - if (n) { - while (n->m_nextpkt) - n = n->m_nextpkt; - do { - if (n->m_flags & M_EOR) { - sbappendrecord(sb, m); /* XXXXXX!!!! */ - return; - } - } while (n->m_next && (n = n->m_next)); + + /* 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->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)) { + if (m != NULL) + m_freem(m); + return (0); + } + + if (sb->sb_flags & SB_RECV) { + int error = sflt_data_in(so, NULL, &m, NULL, 0, NULL); + SBLASTRECORDCHK(sb, "sbappendstream 1"); + if (error != 0) { + if (error != EJUSTRETURN) + m_freem(m); + return (0); + } } - sbcompress(sb, m, n); - KERNEL_DEBUG((DBG_FNC_SBAPPEND | DBG_FUNC_END), sb, sb->sb_cc, 0, 0, 0); + 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_long len = 0, mbcnt = 0; + lck_mtx_t *mutex_held; + + if (sb->sb_so->so_proto->pr_getlock != NULL) + mutex_held = (*sb->sb_so->so_proto->pr_getlock)(sb->sb_so, 0); + else + mutex_held = sb->sb_so->so_proto->pr_domain->dom_mtx; + + lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED); + + if (sbchecking == 0) + 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; - } + 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); } -#ifndef __APPLE__ - if (len != sb->sb_cc || mbcnt != sb->sb_mbcnt) { - printf("cc %ld != %ld || mbcnt %ld != %ld\n", len, sb->sb_cc, - mbcnt, sb->sb_mbcnt); - panic("sbcheck"); - } -#else - if (len != sb->sb_cc) - printf("sbcheck len %ld != sb_cc %ld\n", len, sb->sb_cc); - if (mbcnt != sb->sb_mbcnt) - printf("sbcheck mbcnt %ld != sb_mbcnt %ld\n", mbcnt, sb->sb_mbcnt); -#endif } #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 %p lastrecord %p last %p\n", + sb->sb_mb, sb->sb_lastrecord, m); + printf("packet chain:\n"); + for (m = sb->sb_mb; m != NULL; m = m->m_nextpkt) + printf("\t%p\n", 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 %p mbtail %p last %p\n", + sb->sb_mb, sb->sb_mbtail, 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("%p ", 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. */ -void -sbappendrecord(sb, m0) - register struct sockbuf *sb; - register struct mbuf *m0; +int +sbappendrecord(struct sockbuf *sb, struct mbuf *m0) { - register struct mbuf *m; - register struct kextcb *kp; + struct mbuf *m; + int space = 0; - if (m0 == 0) - return; - - kp = sotokextcb(sbtoso(sb)); - while (kp) - { if (kp->e_sout && kp->e_sout->su_sbappendrecord) - { if ((*kp->e_sout->su_sbappendrecord)(sb, m0, kp)) - return; + 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) { + 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); } - kp = kp->e_next; } - - 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)) { @@ -702,6 +852,8 @@ sbappendrecord(sb, m0) m->m_flags |= M_EOR; } sbcompress(sb, m, m0); + SBLASTRECORDCHK(sb, "sbappendrecord 3"); + return (1); } /* @@ -709,30 +861,33 @@ sbappendrecord(sb, m0) * is inserted at the beginning of the sockbuf, * but after any other OOB data. */ -void -sbinsertoob(sb, m0) - register struct sockbuf *sb; - register struct mbuf *m0; +int +sbinsertoob(struct sockbuf *sb, struct mbuf *m0) { - register struct mbuf *m; - register struct mbuf **mp; - register struct kextcb *kp; + struct mbuf *m; + struct mbuf **mp; if (m0 == 0) - return; - - kp = sotokextcb(sbtoso(sb)); - while (kp) - { if (kp->e_sout && kp->e_sout->su_sbinsertoob) - { if ((*kp->e_sout->su_sbinsertoob)(sb, m0, kp)) - return; + return (0); + + SBLASTRECORDCHK(sb, "sbinsertoob 1"); + + if ((sb->sb_flags & SB_RECV) != 0) { + int error = sflt_data_in(sb->sb_so, NULL, &m0, NULL, + sock_data_filt_flag_oob, NULL); + + SBLASTRECORDCHK(sb, "sbinsertoob 2"); + if (error) { + if (error != EJUSTRETURN) { + m_freem(m0); + } + return (0); } - kp = kp->e_next; } - - 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: @@ -751,6 +906,10 @@ sbinsertoob(sb, m0) */ 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; @@ -759,6 +918,8 @@ sbinsertoob(sb, m0) m->m_flags |= M_EOR; } sbcompress(sb, m, m0); + SBLASTRECORDCHK(sb, "sbinsertoob 3"); + return (1); } /* @@ -766,29 +927,20 @@ sbinsertoob(sb, m0) * 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 */ -int -sbappendaddr(sb, asa, m0, control) - register struct sockbuf *sb; - struct sockaddr *asa; - struct mbuf *m0, *control; +static int +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; - register struct kextcb *kp; if (m0 && (m0->m_flags & M_PKTHDR) == 0) panic("sbappendaddr"); - kp = sotokextcb(sbtoso(sb)); - while (kp) - { if (kp->e_sout && kp->e_sout->su_sbappendaddr) - { if ((*kp->e_sout->su_sbappendaddr)(sb, asa, m0, control, kp)) - return 0; - } - kp = kp->e_next; - } - if (m0) space += m0->m_pkthdr.len; for (n = control; n; n = n->m_next) { @@ -810,40 +962,101 @@ sbappendaddr(sb, asa, m0, control) 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 -sbappendcontrol(sb, m0, control) - struct sockbuf *sb; - struct mbuf *control, *m0; +sbappendaddr(struct sockbuf *sb, struct sockaddr *asa, struct mbuf *m0, + struct mbuf *control, int *error_out) { - register struct mbuf *m, *n; - int space = 0; - register struct kextcb *kp; + int result = 0; + boolean_t sb_unix = (sb->sb_flags & SB_UNIX); - if (control == 0) - panic("sbappendcontrol"); + if (error_out) + *error_out = 0; - kp = sotokextcb(sbtoso(sb)); - while (kp) - { if (kp->e_sout && kp->e_sout->su_sbappendcontrol) - { if ((*kp->e_sout->su_sbappendcontrol)(sb, m0, control, kp)) - return 0; + if (m0 && (m0->m_flags & M_PKTHDR) == 0) + panic("sbappendaddrorfree"); + + 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) != 0) { + int error; + error = sflt_data_in(sb->sb_so, asa, &m0, &control, 0, NULL); + SBLASTRECORDCHK(sb, __func__); + if (error) { + if (error != EJUSTRETURN) { + if (m0) + m_freem(m0); + if (control != NULL && !sb_unix) + m_freem(control); + if (error_out) + *error_out = error; + } + return (0); } - kp = kp->e_next; } + result = sbappendaddr_internal(sb, asa, m0, control); + if (result == 0) { + if (m0) + m_freem(m0); + if (control != NULL && !sb_unix) + m_freem(control); + if (error_out) + *error_out = ENOBUFS; + } + + return (result); +} + +static int +sbappendcontrol_internal(struct sockbuf *sb, struct mbuf *m0, + struct mbuf *control) +{ + struct mbuf *m, *mlast, *n; + int space = 0; + + if (control == 0) + panic("sbappendcontrol"); + for (m = control; ; m = m->m_next) { space += m->m_len; if (m->m_next == 0) @@ -852,41 +1065,108 @@ sbappendcontrol(sb, m0, control) 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) +{ + int result = 0; + 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) { + int error; + + error = sflt_data_in(sb->sb_so, NULL, &m0, &control, 0, NULL); + SBLASTRECORDCHK(sb, __func__); + if (error) { + if (error != EJUSTRETURN) { + if (m0) + m_freem(m0); + if (control != NULL && !sb_unix) + m_freem(control); + if (error_out) + *error_out = error; + } + return (0); + } + } + + result = sbappendcontrol_internal(sb, m0, control); + if (result == 0) { + if (m0) + m_freem(m0); + if (control != NULL && !sb_unix) + m_freem(control); + if (error_out) + *error_out = ENOBUFS; + } + + return (result); +} + /* * Compress mbuf chain m into the socket * buffer sb following mbuf n. If n * is null, the buffer is presumed empty. */ -void -sbcompress(sb, m, n) - register struct sockbuf *sb; - register struct mbuf *m, *n; +static inline void +sbcompress(struct sockbuf *sb, struct mbuf *m, struct mbuf *n) { - register int eor = 0; - register struct mbuf *o; + int eor = 0; + 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) { 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 (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; } @@ -901,6 +1181,10 @@ sbcompress(sb, m, n) (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; } @@ -908,6 +1192,7 @@ sbcompress(sb, m, n) n->m_next = m; else sb->sb_mb = m; + sb->sb_mbtail = m; sballoc(sb, m); n = m; m->m_flags &= ~M_EOR; @@ -920,7 +1205,21 @@ sbcompress(sb, m, n) else printf("semi-panic: sbcompress\n"); } - postevent(0,sb, EV_RWBYTES); +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 %ld mbcnt %ld 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 */ + } } /* @@ -928,22 +1227,11 @@ sbcompress(sb, m, n) * Check that all resources are reclaimed. */ void -sbflush(sb) - register struct sockbuf *sb; +sbflush(struct sockbuf *sb) { - register struct kextcb *kp; - - kp = sotokextcb(sbtoso(sb)); - while (kp) { - if (kp->e_sout && kp->e_sout->su_sbflush) { - if ((*kp->e_sout->su_sbflush)(sb, kp)) - return; - } - kp = kp->e_next; - } - - if (sb->sb_flags & SB_LOCK) - sb_lock(sb); + if (sb->sb_so == NULL) + panic("sbflush sb->sb_so already null sb=%p\n", sb); + (void) sblock(sb, M_WAIT); while (sb->sb_mbcnt) { /* * Don't call sbdrop(sb, 0) if the leading mbuf is non-empty: @@ -953,9 +1241,10 @@ sbflush(sb) break; sbdrop(sb, (int)sb->sb_cc); } - if (sb->sb_cc || sb->sb_mb || sb->sb_mbcnt) - panic("sbflush: cc %ld || mb %p || mbcnt %ld", sb->sb_cc, (void *)sb->sb_mb, sb->sb_mbcnt); + sb_empty_assert(sb, __func__); postevent(0, sb, EV_RWBYTES); + sbunlock(sb, 1); /* keep socket locked */ + } /* @@ -970,52 +1259,49 @@ sbflush(sb) * 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; - register struct kextcb *kp; KERNEL_DEBUG((DBG_FNC_SBDROP | DBG_FUNC_START), sb, len, 0, 0, 0); - kp = sotokextcb(sbtoso(sb)); - while (kp) { - if (kp->e_sout && kp->e_sout->su_sbdrop) { - if ((*kp->e_sout->su_sbdrop)(sb, len, kp)) - return; - } - kp = kp->e_next; - } 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; + 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; @@ -1031,15 +1317,29 @@ sbdrop(sb, 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; + } postevent(0, sb, EV_RWBYTES); @@ -1051,20 +1351,9 @@ sbdrop(sb, len) * and move the next record to the front. */ void -sbdroprecord(sb) - register struct sockbuf *sb; +sbdroprecord(struct sockbuf *sb) { - register struct mbuf *m, *mn; - register struct kextcb *kp; - - kp = sotokextcb(sbtoso(sb)); - while (kp) { - if (kp->e_sout && kp->e_sout->su_sbdroprecord) { - if ((*kp->e_sout->su_sbdroprecord)(sb, kp)) - return; - } - kp = kp->e_next; - } + struct mbuf *m, *mn; m = sb->sb_mb; if (m) { @@ -1075,6 +1364,7 @@ sbdroprecord(sb) m = mn; } while (m); } + SB_EMPTY_FIXUP(sb); postevent(0, sb, EV_RWBYTES); } @@ -1083,21 +1373,18 @@ sbdroprecord(sb) * 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 *); /* 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; @@ -1110,92 +1397,95 @@ sbcreatecontrol(p, size, type, level) * supported by a protocol. Fill in as needed. */ int -pru_abort_notsupp(struct socket *so) +pru_abort_notsupp(__unused struct socket *so) { - return EOPNOTSUPP; + return (EOPNOTSUPP); } - int -pru_accept_notsupp(struct socket *so, struct sockaddr **nam) +pru_accept_notsupp(__unused struct socket *so, __unused struct sockaddr **nam) { - return EOPNOTSUPP; + return (EOPNOTSUPP); } int -pru_attach_notsupp(struct socket *so, int proto, struct proc *p) +pru_attach_notsupp(__unused struct socket *so, __unused int proto, + __unused struct proc *p) { - return EOPNOTSUPP; + return (EOPNOTSUPP); } int -pru_bind_notsupp(struct socket *so, struct sockaddr *nam, struct proc *p) +pru_bind_notsupp(__unused struct socket *so, __unused struct sockaddr *nam, + __unused struct proc *p) { - return EOPNOTSUPP; + return (EOPNOTSUPP); } int -pru_connect_notsupp(struct socket *so, struct sockaddr *nam, struct proc *p) +pru_connect_notsupp(__unused struct socket *so, __unused struct sockaddr *nam, + __unused struct proc *p) { - return EOPNOTSUPP; + return (EOPNOTSUPP); } int -pru_connect2_notsupp(struct socket *so1, struct socket *so2) +pru_connect2_notsupp(__unused struct socket *so1, __unused struct socket *so2) { - return EOPNOTSUPP; + return (EOPNOTSUPP); } int -pru_control_notsupp(struct socket *so, u_long cmd, caddr_t data, - struct ifnet *ifp, struct proc *p) +pru_control_notsupp(__unused struct socket *so, __unused u_long cmd, + __unused caddr_t data, __unused struct ifnet *ifp, __unused struct proc *p) { - return EOPNOTSUPP; + return (EOPNOTSUPP); } int -pru_detach_notsupp(struct socket *so) +pru_detach_notsupp(__unused struct socket *so) { - return EOPNOTSUPP; + return (EOPNOTSUPP); } int -pru_disconnect_notsupp(struct socket *so) +pru_disconnect_notsupp(__unused struct socket *so) { - return EOPNOTSUPP; + return (EOPNOTSUPP); } int -pru_listen_notsupp(struct socket *so, struct proc *p) +pru_listen_notsupp(__unused struct socket *so, __unused struct proc *p) { - return EOPNOTSUPP; + return (EOPNOTSUPP); } int -pru_peeraddr_notsupp(struct socket *so, struct sockaddr **nam) +pru_peeraddr_notsupp(__unused struct socket *so, __unused struct sockaddr **nam) { - return EOPNOTSUPP; + return (EOPNOTSUPP); } int -pru_rcvd_notsupp(struct socket *so, int flags) +pru_rcvd_notsupp(__unused struct socket *so, __unused int flags) { - return EOPNOTSUPP; + return (EOPNOTSUPP); } int -pru_rcvoob_notsupp(struct socket *so, struct mbuf *m, int flags) +pru_rcvoob_notsupp(__unused struct socket *so, __unused struct mbuf *m, + __unused int flags) { - return EOPNOTSUPP; + return (EOPNOTSUPP); } int -pru_send_notsupp(struct socket *so, int flags, struct mbuf *m, - struct sockaddr *addr, struct mbuf *control, - struct proc *p) +pru_send_notsupp(__unused struct socket *so, __unused int flags, + __unused struct mbuf *m, __unused struct sockaddr *addr, + __unused struct mbuf *control, __unused struct proc *p) { - return EOPNOTSUPP; + return (EOPNOTSUPP); } @@ -1204,62 +1494,59 @@ pru_send_notsupp(struct socket *so, int flags, struct mbuf *m, * 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; -int pru_sosend_notsupp(struct socket *so, struct sockaddr *addr, - struct uio *uio, struct mbuf *top, - struct mbuf *control, int flags) + sb = (struct stat *)ub; + sb->st_blksize = so->so_snd.sb_hiwat; + } -{ - return EOPNOTSUPP; + return (0); } -int pru_soreceive_notsupp(struct socket *so, - struct sockaddr **paddr, - struct uio *uio, struct mbuf **mp0, - struct mbuf **controlp, int *flagsp) -{ - return EOPNOTSUPP; -} int +pru_sosend_notsupp(__unused struct socket *so, __unused struct sockaddr *addr, + __unused struct uio *uio, __unused struct mbuf *top, + __unused struct mbuf *control, __unused int flags) -pru_shutdown_notsupp(struct socket *so) { - return EOPNOTSUPP; + return (EOPNOTSUPP); } int -pru_sockaddr_notsupp(struct socket *so, struct sockaddr **nam) +pru_soreceive_notsupp(__unused struct socket *so, + __unused struct sockaddr **paddr, + __unused struct uio *uio, __unused struct mbuf **mp0, + __unused struct mbuf **controlp, __unused int *flagsp) { - return EOPNOTSUPP; + return (EOPNOTSUPP); } -int pru_sosend(struct socket *so, struct sockaddr *addr, - struct uio *uio, struct mbuf *top, - struct mbuf *control, int flags) +int +pru_shutdown_notsupp(__unused struct socket *so) { - return EOPNOTSUPP; + return (EOPNOTSUPP); } -int pru_soreceive(struct socket *so, - struct sockaddr **paddr, - struct uio *uio, struct mbuf **mp0, - struct mbuf **controlp, int *flagsp) +int +pru_sockaddr_notsupp(__unused struct socket *so, __unused struct sockaddr **nam) { - return EOPNOTSUPP; + return (EOPNOTSUPP); } - -int pru_sopoll_notsupp(struct socket *so, int events, - struct ucred *cred) +int +pru_sopoll_notsupp(__unused struct socket *so, __unused int events, + __unused kauth_cred_t cred, __unused void *wql) { - return EOPNOTSUPP; + return (EOPNOTSUPP); } @@ -1272,10 +1559,11 @@ int pru_sopoll_notsupp(struct socket *so, int events, * 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)) != 0); + return ((sb->sb_flags & + (SB_WAIT|SB_SEL|SB_ASYNC|SB_UPCALL|SB_KNOTE)) != 0); } /* @@ -1287,24 +1575,24 @@ sb_notify(struct sockbuf *sb) long sbspace(struct sockbuf *sb) { - return ((long) imin((int)(sb->sb_hiwat - sb->sb_cc), - (int)(sb->sb_mbmax - sb->sb_mbcnt))); + return ((long)imin((int)(sb->sb_hiwat - sb->sb_cc), + (int)(sb->sb_mbmax - sb->sb_mbcnt))); } /* 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) || + so->so_comp.tqh_first || so->so_error); } /* can we write something to so? */ @@ -1312,11 +1600,11 @@ soreadable(struct socket *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); + return ((sbspace(&(so)->so_snd) >= (long)(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); } /* adjust counters in sb reflecting allocation of m */ @@ -1324,76 +1612,127 @@ sowriteable(struct socket *so) void sballoc(struct sockbuf *sb, struct mbuf *m) { + 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) + + if (m->m_flags & M_EXT) { sb->sb_mbcnt += m->m_ext.ext_size; + cnt += m->m_ext.ext_size / MSIZE ; + } + OSAddAtomic(cnt, (SInt32*)&total_mb_cnt); } /* adjust counters in sb reflecting freeing of m */ void sbfree(struct sockbuf *sb, struct mbuf *m) { - sb->sb_cc -= m->m_len; + 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) + if (m->m_flags & M_EXT) { sb->sb_mbcnt -= m->m_ext.ext_size; + cnt -= m->m_ext.ext_size / MSIZE ; + } + OSAddAtomic(cnt, (SInt32*)&total_mb_cnt); } /* * Set lock on sockbuf sb; sleep if lock is already held. * Unless SB_NOINTR is set on sockbuf, sleep is interruptible. * Returns error without lock if sleep is interrupted. + * + * Returns: 0 Success + * EWOULDBLOCK + * sb_lock:EINTR */ int sblock(struct sockbuf *sb, int wf) { - return(sb->sb_flags & SB_LOCK ? - ((wf == M_WAIT) ? sb_lock(sb) : EWOULDBLOCK) : - (sb->sb_flags |= SB_LOCK), 0); + int error = 0; + + if (sb->sb_flags & SB_LOCK) + error = (wf == M_WAIT) ? sb_lock(sb) : EWOULDBLOCK; + else + sb->sb_flags |= SB_LOCK; + + return (error); } /* release lock on sockbuf sb */ void -sbunlock(struct sockbuf *sb) +sbunlock(struct sockbuf *sb, int keeplocked) { - sb->sb_flags &= ~SB_LOCK; - if (sb->sb_flags & SB_WANT) { - sb->sb_flags &= ~SB_WANT; - wakeup((caddr_t)&(sb)->sb_flags); - } + struct socket *so = sb->sb_so; + int lr_saved; + lck_mtx_t *mutex_held; + + lr_saved = (unsigned int) __builtin_return_address(0); + + sb->sb_flags &= ~SB_LOCK; + + if (sb->sb_flags & SB_WANT) { + sb->sb_flags &= ~SB_WANT; + if (so->so_usecount < 0) + panic("sbunlock: b4 wakeup so=%p ref=%d lr=%x " + "sb_flags=%x\n", sb->sb_so, so->so_usecount, + lr_saved, sb->sb_flags); + + wakeup((caddr_t)&(sb)->sb_flags); + } + if (keeplocked == 0) { /* unlock on exit */ + 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); + + so->so_usecount--; + if (so->so_usecount < 0) + panic("sbunlock: unlock on exit so=%p ref=%d lr=%x " + "sb_flags=%x\n", so, so->so_usecount, lr_saved, + sb->sb_flags); + so->unlock_lr[so->next_unlock_lr] = (u_int32_t)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); + if (sb_notify(&so->so_rcv)) + sowakeup(so, &so->so_rcv); } void -sowwakeup(struct socket * so) +sowwakeup(struct socket *so) { - if (sb_notify(&so->so_snd)) - sowakeup(so, &so->so_snd); + if (sb_notify(&so->so_snd)) + sowakeup(so, &so->so_snd); } -#endif __APPLE__ +#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); } /* @@ -1407,15 +1746,19 @@ dup_sockaddr(sa, canwait) void sotoxsocket(struct socket *so, struct xsocket *xso) { - xso->xso_len = sizeof *xso; + xso->xso_len = sizeof (*xso); xso->xso_so = so; xso->so_type = so->so_type; xso->so_options = so->so_options; xso->so_linger = so->so_linger; xso->so_state = so->so_state; xso->so_pcb = so->so_pcb; - xso->xso_protocol = so->so_proto->pr_protocol; - xso->xso_family = so->so_proto->pr_domain->dom_family; + if (so->so_proto) { + xso->xso_protocol = so->so_proto->pr_protocol; + xso->xso_family = so->so_proto->pr_domain->dom_family; + } 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; @@ -1443,24 +1786,35 @@ sbtoxsockbuf(struct sockbuf *sb, struct xsockbuf *xsb) xsb->sb_mbmax = sb->sb_mbmax; xsb->sb_lowat = sb->sb_lowat; xsb->sb_flags = sb->sb_flags; - xsb->sb_timeo = sb->sb_timeo; + xsb->sb_timeo = (u_long) + (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; } /* * 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, 0, "IPC"); /* 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_INT(_kern_ipc, KIPC_MAXSOCKBUF, maxsockbuf, CTLFLAG_RW, +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, +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, ""); - + &sb_efficiency, 0, ""); +SYSCTL_INT(_kern_ipc, OID_AUTO, sbspace_factor, CTLFLAG_RW, + &sbspace_factor, 0, "Ratio of mbuf/cluster use for socket layers"); +SYSCTL_INT(_kern_ipc, KIPC_NMBCLUSTERS, nmbclusters, CTLFLAG_RD, + &nmbclusters, 0, ""); +SYSCTL_INT(_kern_ipc, OID_AUTO, njcl, CTLFLAG_RD, &njcl, 0, ""); +SYSCTL_INT(_kern_ipc, OID_AUTO, njclbytes, CTLFLAG_RD, &njclbytes, 0, ""); +SYSCTL_INT(_kern_ipc, KIPC_SOQLIMITCOMPAT, soqlimitcompat, CTLFLAG_RW, + &soqlimitcompat, 1, "Enable socket queue limit compatibility"); +SYSCTL_INT(_kern_ipc, OID_AUTO, soqlencomp, CTLFLAG_RW, + &soqlencomp, 0, "Listen backlog represents only complete queue");