7a2c93b86e
removed the use of "error" when MAC was not
defined, resulting in an unused variable error.
Sponsored by: Netflix
Reviewed by: jhb
842 lines
20 KiB
C
842 lines
20 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1982, 1986, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)sys_socket.c 8.1 (Berkeley) 6/10/93
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/aio.h>
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#include <sys/domain.h>
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#include <sys/file.h>
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#include <sys/filedesc.h>
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#include <sys/kernel.h>
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#include <sys/kthread.h>
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#include <sys/malloc.h>
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#include <sys/proc.h>
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#include <sys/protosw.h>
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#include <sys/sigio.h>
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#include <sys/signal.h>
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#include <sys/signalvar.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/filio.h> /* XXX */
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#include <sys/sockio.h>
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#include <sys/stat.h>
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#include <sys/sysctl.h>
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#include <sys/sysproto.h>
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#include <sys/taskqueue.h>
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#include <sys/uio.h>
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#include <sys/ucred.h>
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#include <sys/un.h>
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#include <sys/unpcb.h>
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#include <sys/user.h>
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#include <net/if.h>
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#include <net/if_var.h>
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#include <net/route.h>
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#include <net/vnet.h>
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#include <netinet/in.h>
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#include <netinet/in_pcb.h>
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#include <security/mac/mac_framework.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <vm/vm_extern.h>
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#include <vm/vm_map.h>
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static SYSCTL_NODE(_kern_ipc, OID_AUTO, aio, CTLFLAG_RD | CTLFLAG_MPSAFE, NULL,
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"socket AIO stats");
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static int empty_results;
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SYSCTL_INT(_kern_ipc_aio, OID_AUTO, empty_results, CTLFLAG_RD, &empty_results,
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0, "socket operation returned EAGAIN");
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static int empty_retries;
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SYSCTL_INT(_kern_ipc_aio, OID_AUTO, empty_retries, CTLFLAG_RD, &empty_retries,
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0, "socket operation retries");
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static fo_rdwr_t soo_read;
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static fo_rdwr_t soo_write;
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static fo_ioctl_t soo_ioctl;
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static fo_poll_t soo_poll;
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extern fo_kqfilter_t soo_kqfilter;
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static fo_stat_t soo_stat;
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static fo_close_t soo_close;
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static fo_fill_kinfo_t soo_fill_kinfo;
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static fo_aio_queue_t soo_aio_queue;
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static void soo_aio_cancel(struct kaiocb *job);
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struct fileops socketops = {
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.fo_read = soo_read,
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.fo_write = soo_write,
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.fo_truncate = invfo_truncate,
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.fo_ioctl = soo_ioctl,
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.fo_poll = soo_poll,
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.fo_kqfilter = soo_kqfilter,
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.fo_stat = soo_stat,
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.fo_close = soo_close,
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.fo_chmod = invfo_chmod,
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.fo_chown = invfo_chown,
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.fo_sendfile = invfo_sendfile,
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.fo_fill_kinfo = soo_fill_kinfo,
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.fo_aio_queue = soo_aio_queue,
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.fo_flags = DFLAG_PASSABLE
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};
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static int
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soo_read(struct file *fp, struct uio *uio, struct ucred *active_cred,
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int flags, struct thread *td)
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{
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struct socket *so = fp->f_data;
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int error;
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#ifdef MAC
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error = mac_socket_check_receive(active_cred, so);
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if (error)
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return (error);
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#endif
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error = soreceive(so, 0, uio, 0, 0, 0);
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return (error);
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}
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static int
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soo_write(struct file *fp, struct uio *uio, struct ucred *active_cred,
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int flags, struct thread *td)
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{
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struct socket *so = fp->f_data;
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int error;
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#ifdef MAC
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error = mac_socket_check_send(active_cred, so);
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if (error)
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return (error);
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#endif
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error = sousrsend(so, NULL, uio, NULL, 0, NULL);
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return (error);
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}
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static int
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soo_ioctl(struct file *fp, u_long cmd, void *data, struct ucred *active_cred,
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struct thread *td)
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{
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struct socket *so = fp->f_data;
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int error = 0;
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switch (cmd) {
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case FIONBIO:
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SOCK_LOCK(so);
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if (*(int *)data)
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so->so_state |= SS_NBIO;
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else
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so->so_state &= ~SS_NBIO;
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SOCK_UNLOCK(so);
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break;
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case FIOASYNC:
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if (*(int *)data) {
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SOCK_LOCK(so);
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so->so_state |= SS_ASYNC;
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if (SOLISTENING(so)) {
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so->sol_sbrcv_flags |= SB_ASYNC;
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so->sol_sbsnd_flags |= SB_ASYNC;
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} else {
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SOCK_RECVBUF_LOCK(so);
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so->so_rcv.sb_flags |= SB_ASYNC;
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SOCK_RECVBUF_UNLOCK(so);
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SOCK_SENDBUF_LOCK(so);
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so->so_snd.sb_flags |= SB_ASYNC;
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SOCK_SENDBUF_UNLOCK(so);
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}
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SOCK_UNLOCK(so);
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} else {
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SOCK_LOCK(so);
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so->so_state &= ~SS_ASYNC;
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if (SOLISTENING(so)) {
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so->sol_sbrcv_flags &= ~SB_ASYNC;
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so->sol_sbsnd_flags &= ~SB_ASYNC;
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} else {
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SOCK_RECVBUF_LOCK(so);
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so->so_rcv.sb_flags &= ~SB_ASYNC;
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SOCK_RECVBUF_UNLOCK(so);
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SOCK_SENDBUF_LOCK(so);
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so->so_snd.sb_flags &= ~SB_ASYNC;
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SOCK_SENDBUF_UNLOCK(so);
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}
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SOCK_UNLOCK(so);
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}
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break;
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case FIONREAD:
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SOCK_RECVBUF_LOCK(so);
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if (SOLISTENING(so)) {
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error = EINVAL;
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} else {
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*(int *)data = sbavail(&so->so_rcv) - so->so_rcv.sb_ctl;
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}
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SOCK_RECVBUF_UNLOCK(so);
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break;
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case FIONWRITE:
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/* Unlocked read. */
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if (SOLISTENING(so)) {
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error = EINVAL;
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} else {
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*(int *)data = sbavail(&so->so_snd);
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}
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break;
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case FIONSPACE:
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/* Unlocked read. */
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if (SOLISTENING(so)) {
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error = EINVAL;
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} else {
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if ((so->so_snd.sb_hiwat < sbused(&so->so_snd)) ||
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(so->so_snd.sb_mbmax < so->so_snd.sb_mbcnt)) {
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*(int *)data = 0;
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} else {
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*(int *)data = sbspace(&so->so_snd);
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}
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}
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break;
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case FIOSETOWN:
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error = fsetown(*(int *)data, &so->so_sigio);
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break;
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case FIOGETOWN:
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*(int *)data = fgetown(&so->so_sigio);
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break;
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case SIOCSPGRP:
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error = fsetown(-(*(int *)data), &so->so_sigio);
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break;
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case SIOCGPGRP:
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*(int *)data = -fgetown(&so->so_sigio);
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break;
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case SIOCATMARK:
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/* Unlocked read. */
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if (SOLISTENING(so)) {
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error = EINVAL;
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} else {
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*(int *)data = (so->so_rcv.sb_state & SBS_RCVATMARK) != 0;
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}
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break;
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default:
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/*
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* Interface/routing/protocol specific ioctls: interface and
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* routing ioctls should have a different entry since a
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* socket is unnecessary.
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*/
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if (IOCGROUP(cmd) == 'i')
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error = ifioctl(so, cmd, data, td);
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else if (IOCGROUP(cmd) == 'r') {
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CURVNET_SET(so->so_vnet);
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error = rtioctl_fib(cmd, data, so->so_fibnum);
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CURVNET_RESTORE();
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} else {
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CURVNET_SET(so->so_vnet);
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error = so->so_proto->pr_control(so, cmd, data, 0, td);
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CURVNET_RESTORE();
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}
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break;
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}
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return (error);
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}
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static int
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soo_poll(struct file *fp, int events, struct ucred *active_cred,
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struct thread *td)
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{
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struct socket *so = fp->f_data;
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#ifdef MAC
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int error;
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error = mac_socket_check_poll(active_cred, so);
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if (error)
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return (error);
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#endif
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return (sopoll(so, events, fp->f_cred, td));
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}
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static int
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soo_stat(struct file *fp, struct stat *ub, struct ucred *active_cred)
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{
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struct socket *so = fp->f_data;
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int error = 0;
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bzero((caddr_t)ub, sizeof (*ub));
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ub->st_mode = S_IFSOCK;
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#ifdef MAC
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error = mac_socket_check_stat(active_cred, so);
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if (error)
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return (error);
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#endif
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SOCK_LOCK(so);
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if (!SOLISTENING(so)) {
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struct sockbuf *sb;
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/*
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* If SBS_CANTRCVMORE is set, but there's still data left
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* in the receive buffer, the socket is still readable.
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*/
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sb = &so->so_rcv;
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SOCK_RECVBUF_LOCK(so);
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if ((sb->sb_state & SBS_CANTRCVMORE) == 0 || sbavail(sb))
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ub->st_mode |= S_IRUSR | S_IRGRP | S_IROTH;
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ub->st_size = sbavail(sb) - sb->sb_ctl;
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SOCK_RECVBUF_UNLOCK(so);
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sb = &so->so_snd;
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SOCK_SENDBUF_LOCK(so);
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if ((sb->sb_state & SBS_CANTSENDMORE) == 0)
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ub->st_mode |= S_IWUSR | S_IWGRP | S_IWOTH;
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SOCK_SENDBUF_UNLOCK(so);
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}
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ub->st_uid = so->so_cred->cr_uid;
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ub->st_gid = so->so_cred->cr_gid;
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if (so->so_proto->pr_sense)
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error = so->so_proto->pr_sense(so, ub);
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SOCK_UNLOCK(so);
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return (error);
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}
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/*
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* API socket close on file pointer. We call soclose() to close the socket
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* (including initiating closing protocols). soclose() will sorele() the
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* file reference but the actual socket will not go away until the socket's
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* ref count hits 0.
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*/
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static int
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soo_close(struct file *fp, struct thread *td)
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{
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int error = 0;
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struct socket *so;
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so = fp->f_data;
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fp->f_ops = &badfileops;
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fp->f_data = NULL;
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if (so)
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error = soclose(so);
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return (error);
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}
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static int
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soo_fill_kinfo(struct file *fp, struct kinfo_file *kif, struct filedesc *fdp)
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{
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struct sockaddr *sa;
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struct inpcb *inpcb;
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struct unpcb *unpcb;
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struct socket *so;
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int error;
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kif->kf_type = KF_TYPE_SOCKET;
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so = fp->f_data;
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CURVNET_SET(so->so_vnet);
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kif->kf_un.kf_sock.kf_sock_domain0 =
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so->so_proto->pr_domain->dom_family;
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kif->kf_un.kf_sock.kf_sock_type0 = so->so_type;
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kif->kf_un.kf_sock.kf_sock_protocol0 = so->so_proto->pr_protocol;
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kif->kf_un.kf_sock.kf_sock_pcb = (uintptr_t)so->so_pcb;
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switch (kif->kf_un.kf_sock.kf_sock_domain0) {
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case AF_INET:
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case AF_INET6:
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if (so->so_pcb != NULL) {
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inpcb = (struct inpcb *)(so->so_pcb);
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kif->kf_un.kf_sock.kf_sock_inpcb =
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(uintptr_t)inpcb->inp_ppcb;
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}
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kif->kf_un.kf_sock.kf_sock_rcv_sb_state =
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so->so_rcv.sb_state;
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kif->kf_un.kf_sock.kf_sock_snd_sb_state =
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so->so_snd.sb_state;
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kif->kf_un.kf_sock.kf_sock_sendq =
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sbused(&so->so_snd);
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kif->kf_un.kf_sock.kf_sock_recvq =
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sbused(&so->so_rcv);
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break;
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case AF_UNIX:
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if (so->so_pcb != NULL) {
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unpcb = (struct unpcb *)(so->so_pcb);
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if (unpcb->unp_conn) {
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kif->kf_un.kf_sock.kf_sock_unpconn =
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(uintptr_t)unpcb->unp_conn;
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kif->kf_un.kf_sock.kf_sock_rcv_sb_state =
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so->so_rcv.sb_state;
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kif->kf_un.kf_sock.kf_sock_snd_sb_state =
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so->so_snd.sb_state;
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kif->kf_un.kf_sock.kf_sock_sendq =
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sbused(&so->so_snd);
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kif->kf_un.kf_sock.kf_sock_recvq =
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sbused(&so->so_rcv);
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}
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}
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break;
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}
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error = so->so_proto->pr_sockaddr(so, &sa);
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if (error == 0 &&
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sa->sa_len <= sizeof(kif->kf_un.kf_sock.kf_sa_local)) {
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bcopy(sa, &kif->kf_un.kf_sock.kf_sa_local, sa->sa_len);
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free(sa, M_SONAME);
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}
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error = so->so_proto->pr_peeraddr(so, &sa);
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if (error == 0 &&
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sa->sa_len <= sizeof(kif->kf_un.kf_sock.kf_sa_peer)) {
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bcopy(sa, &kif->kf_un.kf_sock.kf_sa_peer, sa->sa_len);
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free(sa, M_SONAME);
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}
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strncpy(kif->kf_path, so->so_proto->pr_domain->dom_name,
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sizeof(kif->kf_path));
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CURVNET_RESTORE();
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return (0);
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}
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/*
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* Use the 'backend3' field in AIO jobs to store the amount of data
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* completed by the AIO job so far.
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*/
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#define aio_done backend3
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static STAILQ_HEAD(, task) soaio_jobs;
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static struct mtx soaio_jobs_lock;
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static struct task soaio_kproc_task;
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static int soaio_starting, soaio_idle, soaio_queued;
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static struct unrhdr *soaio_kproc_unr;
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static int soaio_max_procs = MAX_AIO_PROCS;
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SYSCTL_INT(_kern_ipc_aio, OID_AUTO, max_procs, CTLFLAG_RW, &soaio_max_procs, 0,
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"Maximum number of kernel processes to use for async socket IO");
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static int soaio_num_procs;
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SYSCTL_INT(_kern_ipc_aio, OID_AUTO, num_procs, CTLFLAG_RD, &soaio_num_procs, 0,
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"Number of active kernel processes for async socket IO");
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static int soaio_target_procs = TARGET_AIO_PROCS;
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SYSCTL_INT(_kern_ipc_aio, OID_AUTO, target_procs, CTLFLAG_RD,
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&soaio_target_procs, 0,
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"Preferred number of ready kernel processes for async socket IO");
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static int soaio_lifetime;
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SYSCTL_INT(_kern_ipc_aio, OID_AUTO, lifetime, CTLFLAG_RW, &soaio_lifetime, 0,
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"Maximum lifetime for idle aiod");
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static void
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soaio_kproc_loop(void *arg)
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{
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struct proc *p;
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struct vmspace *myvm;
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struct task *task;
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int error, id, pending;
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id = (intptr_t)arg;
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/*
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* Grab an extra reference on the daemon's vmspace so that it
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* doesn't get freed by jobs that switch to a different
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* vmspace.
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*/
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p = curproc;
|
|
myvm = vmspace_acquire_ref(p);
|
|
|
|
mtx_lock(&soaio_jobs_lock);
|
|
MPASS(soaio_starting > 0);
|
|
soaio_starting--;
|
|
for (;;) {
|
|
while (!STAILQ_EMPTY(&soaio_jobs)) {
|
|
task = STAILQ_FIRST(&soaio_jobs);
|
|
STAILQ_REMOVE_HEAD(&soaio_jobs, ta_link);
|
|
soaio_queued--;
|
|
pending = task->ta_pending;
|
|
task->ta_pending = 0;
|
|
mtx_unlock(&soaio_jobs_lock);
|
|
|
|
task->ta_func(task->ta_context, pending);
|
|
|
|
mtx_lock(&soaio_jobs_lock);
|
|
}
|
|
MPASS(soaio_queued == 0);
|
|
|
|
if (p->p_vmspace != myvm) {
|
|
mtx_unlock(&soaio_jobs_lock);
|
|
vmspace_switch_aio(myvm);
|
|
mtx_lock(&soaio_jobs_lock);
|
|
continue;
|
|
}
|
|
|
|
soaio_idle++;
|
|
error = mtx_sleep(&soaio_idle, &soaio_jobs_lock, 0, "-",
|
|
soaio_lifetime);
|
|
soaio_idle--;
|
|
if (error == EWOULDBLOCK && STAILQ_EMPTY(&soaio_jobs) &&
|
|
soaio_num_procs > soaio_target_procs)
|
|
break;
|
|
}
|
|
soaio_num_procs--;
|
|
mtx_unlock(&soaio_jobs_lock);
|
|
free_unr(soaio_kproc_unr, id);
|
|
kproc_exit(0);
|
|
}
|
|
|
|
static void
|
|
soaio_kproc_create(void *context, int pending)
|
|
{
|
|
struct proc *p;
|
|
int error, id;
|
|
|
|
mtx_lock(&soaio_jobs_lock);
|
|
for (;;) {
|
|
if (soaio_num_procs < soaio_target_procs) {
|
|
/* Must create */
|
|
} else if (soaio_num_procs >= soaio_max_procs) {
|
|
/*
|
|
* Hit the limit on kernel processes, don't
|
|
* create another one.
|
|
*/
|
|
break;
|
|
} else if (soaio_queued <= soaio_idle + soaio_starting) {
|
|
/*
|
|
* No more AIO jobs waiting for a process to be
|
|
* created, so stop.
|
|
*/
|
|
break;
|
|
}
|
|
soaio_starting++;
|
|
mtx_unlock(&soaio_jobs_lock);
|
|
|
|
id = alloc_unr(soaio_kproc_unr);
|
|
error = kproc_create(soaio_kproc_loop, (void *)(intptr_t)id,
|
|
&p, 0, 0, "soaiod%d", id);
|
|
if (error != 0) {
|
|
free_unr(soaio_kproc_unr, id);
|
|
mtx_lock(&soaio_jobs_lock);
|
|
soaio_starting--;
|
|
break;
|
|
}
|
|
|
|
mtx_lock(&soaio_jobs_lock);
|
|
soaio_num_procs++;
|
|
}
|
|
mtx_unlock(&soaio_jobs_lock);
|
|
}
|
|
|
|
void
|
|
soaio_enqueue(struct task *task)
|
|
{
|
|
|
|
mtx_lock(&soaio_jobs_lock);
|
|
MPASS(task->ta_pending == 0);
|
|
task->ta_pending++;
|
|
STAILQ_INSERT_TAIL(&soaio_jobs, task, ta_link);
|
|
soaio_queued++;
|
|
if (soaio_queued <= soaio_idle)
|
|
wakeup_one(&soaio_idle);
|
|
else if (soaio_num_procs < soaio_max_procs)
|
|
taskqueue_enqueue(taskqueue_thread, &soaio_kproc_task);
|
|
mtx_unlock(&soaio_jobs_lock);
|
|
}
|
|
|
|
static void
|
|
soaio_init(void)
|
|
{
|
|
|
|
soaio_lifetime = AIOD_LIFETIME_DEFAULT;
|
|
STAILQ_INIT(&soaio_jobs);
|
|
mtx_init(&soaio_jobs_lock, "soaio jobs", NULL, MTX_DEF);
|
|
soaio_kproc_unr = new_unrhdr(1, INT_MAX, NULL);
|
|
TASK_INIT(&soaio_kproc_task, 0, soaio_kproc_create, NULL);
|
|
}
|
|
SYSINIT(soaio, SI_SUB_VFS, SI_ORDER_ANY, soaio_init, NULL);
|
|
|
|
static __inline int
|
|
soaio_ready(struct socket *so, struct sockbuf *sb)
|
|
{
|
|
return (sb == &so->so_rcv ? soreadable(so) : sowriteable(so));
|
|
}
|
|
|
|
static void
|
|
soaio_process_job(struct socket *so, sb_which which, struct kaiocb *job)
|
|
{
|
|
struct ucred *td_savedcred;
|
|
struct thread *td;
|
|
struct sockbuf *sb = sobuf(so, which);
|
|
#ifdef MAC
|
|
struct file *fp = job->fd_file;
|
|
#endif
|
|
size_t cnt, done, job_total_nbytes __diagused;
|
|
long ru_before;
|
|
int error, flags;
|
|
|
|
SOCK_BUF_UNLOCK(so, which);
|
|
aio_switch_vmspace(job);
|
|
td = curthread;
|
|
retry:
|
|
td_savedcred = td->td_ucred;
|
|
td->td_ucred = job->cred;
|
|
|
|
job_total_nbytes = job->uiop->uio_resid + job->aio_done;
|
|
done = job->aio_done;
|
|
cnt = job->uiop->uio_resid;
|
|
job->uiop->uio_offset = 0;
|
|
job->uiop->uio_td = td;
|
|
flags = MSG_NBIO;
|
|
|
|
/*
|
|
* For resource usage accounting, only count a completed request
|
|
* as a single message to avoid counting multiple calls to
|
|
* sosend/soreceive on a blocking socket.
|
|
*/
|
|
|
|
if (sb == &so->so_rcv) {
|
|
ru_before = td->td_ru.ru_msgrcv;
|
|
#ifdef MAC
|
|
error = mac_socket_check_receive(fp->f_cred, so);
|
|
if (error == 0)
|
|
|
|
#endif
|
|
error = soreceive(so, NULL, job->uiop, NULL, NULL,
|
|
&flags);
|
|
if (td->td_ru.ru_msgrcv != ru_before)
|
|
job->msgrcv = 1;
|
|
} else {
|
|
if (!TAILQ_EMPTY(&sb->sb_aiojobq))
|
|
flags |= MSG_MORETOCOME;
|
|
ru_before = td->td_ru.ru_msgsnd;
|
|
#ifdef MAC
|
|
error = mac_socket_check_send(fp->f_cred, so);
|
|
if (error == 0)
|
|
#endif
|
|
error = sousrsend(so, NULL, job->uiop, NULL, flags,
|
|
job->userproc);
|
|
if (td->td_ru.ru_msgsnd != ru_before)
|
|
job->msgsnd = 1;
|
|
}
|
|
|
|
done += cnt - job->uiop->uio_resid;
|
|
job->aio_done = done;
|
|
td->td_ucred = td_savedcred;
|
|
|
|
if (error == EWOULDBLOCK) {
|
|
/*
|
|
* The request was either partially completed or not
|
|
* completed at all due to racing with a read() or
|
|
* write() on the socket. If the socket is
|
|
* non-blocking, return with any partial completion.
|
|
* If the socket is blocking or if no progress has
|
|
* been made, requeue this request at the head of the
|
|
* queue to try again when the socket is ready.
|
|
*/
|
|
MPASS(done != job_total_nbytes);
|
|
SOCK_BUF_LOCK(so, which);
|
|
if (done == 0 || !(so->so_state & SS_NBIO)) {
|
|
empty_results++;
|
|
if (soaio_ready(so, sb)) {
|
|
empty_retries++;
|
|
SOCK_BUF_UNLOCK(so, which);
|
|
goto retry;
|
|
}
|
|
|
|
if (!aio_set_cancel_function(job, soo_aio_cancel)) {
|
|
SOCK_BUF_UNLOCK(so, which);
|
|
if (done != 0)
|
|
aio_complete(job, done, 0);
|
|
else
|
|
aio_cancel(job);
|
|
SOCK_BUF_LOCK(so, which);
|
|
} else {
|
|
TAILQ_INSERT_HEAD(&sb->sb_aiojobq, job, list);
|
|
}
|
|
return;
|
|
}
|
|
SOCK_BUF_UNLOCK(so, which);
|
|
}
|
|
if (done != 0 && (error == ERESTART || error == EINTR ||
|
|
error == EWOULDBLOCK))
|
|
error = 0;
|
|
if (error)
|
|
aio_complete(job, -1, error);
|
|
else
|
|
aio_complete(job, done, 0);
|
|
SOCK_BUF_LOCK(so, which);
|
|
}
|
|
|
|
static void
|
|
soaio_process_sb(struct socket *so, sb_which which)
|
|
{
|
|
struct kaiocb *job;
|
|
struct sockbuf *sb = sobuf(so, which);
|
|
|
|
CURVNET_SET(so->so_vnet);
|
|
SOCK_BUF_LOCK(so, which);
|
|
while (!TAILQ_EMPTY(&sb->sb_aiojobq) && soaio_ready(so, sb)) {
|
|
job = TAILQ_FIRST(&sb->sb_aiojobq);
|
|
TAILQ_REMOVE(&sb->sb_aiojobq, job, list);
|
|
if (!aio_clear_cancel_function(job))
|
|
continue;
|
|
|
|
soaio_process_job(so, which, job);
|
|
}
|
|
|
|
/*
|
|
* If there are still pending requests, the socket must not be
|
|
* ready so set SB_AIO to request a wakeup when the socket
|
|
* becomes ready.
|
|
*/
|
|
if (!TAILQ_EMPTY(&sb->sb_aiojobq))
|
|
sb->sb_flags |= SB_AIO;
|
|
sb->sb_flags &= ~SB_AIO_RUNNING;
|
|
SOCK_BUF_UNLOCK(so, which);
|
|
|
|
sorele(so);
|
|
CURVNET_RESTORE();
|
|
}
|
|
|
|
void
|
|
soaio_rcv(void *context, int pending)
|
|
{
|
|
struct socket *so;
|
|
|
|
so = context;
|
|
soaio_process_sb(so, SO_RCV);
|
|
}
|
|
|
|
void
|
|
soaio_snd(void *context, int pending)
|
|
{
|
|
struct socket *so;
|
|
|
|
so = context;
|
|
soaio_process_sb(so, SO_SND);
|
|
}
|
|
|
|
void
|
|
sowakeup_aio(struct socket *so, sb_which which)
|
|
{
|
|
struct sockbuf *sb = sobuf(so, which);
|
|
|
|
SOCK_BUF_LOCK_ASSERT(so, which);
|
|
|
|
sb->sb_flags &= ~SB_AIO;
|
|
if (sb->sb_flags & SB_AIO_RUNNING)
|
|
return;
|
|
sb->sb_flags |= SB_AIO_RUNNING;
|
|
soref(so);
|
|
soaio_enqueue(&sb->sb_aiotask);
|
|
}
|
|
|
|
static void
|
|
soo_aio_cancel(struct kaiocb *job)
|
|
{
|
|
struct socket *so;
|
|
struct sockbuf *sb;
|
|
long done;
|
|
int opcode;
|
|
sb_which which;
|
|
|
|
so = job->fd_file->f_data;
|
|
opcode = job->uaiocb.aio_lio_opcode;
|
|
if (opcode & LIO_READ) {
|
|
sb = &so->so_rcv;
|
|
which = SO_RCV;
|
|
} else {
|
|
MPASS(opcode & LIO_WRITE);
|
|
sb = &so->so_snd;
|
|
which = SO_SND;
|
|
}
|
|
|
|
SOCK_BUF_LOCK(so, which);
|
|
if (!aio_cancel_cleared(job))
|
|
TAILQ_REMOVE(&sb->sb_aiojobq, job, list);
|
|
if (TAILQ_EMPTY(&sb->sb_aiojobq))
|
|
sb->sb_flags &= ~SB_AIO;
|
|
SOCK_BUF_UNLOCK(so, which);
|
|
|
|
done = job->aio_done;
|
|
if (done != 0)
|
|
aio_complete(job, done, 0);
|
|
else
|
|
aio_cancel(job);
|
|
}
|
|
|
|
static int
|
|
soo_aio_queue(struct file *fp, struct kaiocb *job)
|
|
{
|
|
struct socket *so;
|
|
struct sockbuf *sb;
|
|
sb_which which;
|
|
int error;
|
|
|
|
so = fp->f_data;
|
|
error = so->so_proto->pr_aio_queue(so, job);
|
|
if (error == 0)
|
|
return (0);
|
|
|
|
/* Lock through the socket, since this may be a listening socket. */
|
|
switch (job->uaiocb.aio_lio_opcode & (LIO_WRITE | LIO_READ)) {
|
|
case LIO_READ:
|
|
SOCK_RECVBUF_LOCK(so);
|
|
sb = &so->so_rcv;
|
|
which = SO_RCV;
|
|
break;
|
|
case LIO_WRITE:
|
|
SOCK_SENDBUF_LOCK(so);
|
|
sb = &so->so_snd;
|
|
which = SO_SND;
|
|
break;
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
|
|
if (SOLISTENING(so)) {
|
|
SOCK_BUF_UNLOCK(so, which);
|
|
return (EINVAL);
|
|
}
|
|
|
|
if (!aio_set_cancel_function(job, soo_aio_cancel))
|
|
panic("new job was cancelled");
|
|
TAILQ_INSERT_TAIL(&sb->sb_aiojobq, job, list);
|
|
if (!(sb->sb_flags & SB_AIO_RUNNING)) {
|
|
if (soaio_ready(so, sb))
|
|
sowakeup_aio(so, which);
|
|
else
|
|
sb->sb_flags |= SB_AIO;
|
|
}
|
|
SOCK_BUF_UNLOCK(so, which);
|
|
return (0);
|
|
}
|