version 1.56.2.2, 2001/09/07 22:01:53 |
version 1.65, 2002/05/03 00:35:14 |
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/* $NetBSD$ */ |
/* $NetBSD$ */ |
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/*- |
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* Copyright (c) 2002 The NetBSD Foundation, Inc. |
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* All rights reserved. |
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* |
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* This code is derived from software contributed to The NetBSD Foundation |
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* by Jason R. Thorpe of Wasabi Systems, Inc. |
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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. All advertising materials mentioning features or use of this software |
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* must display the following acknowledgement: |
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* This product includes software developed by the NetBSD |
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* Foundation, Inc. and its contributors. |
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* 4. Neither the name of The NetBSD Foundation nor the names of its |
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* contributors may be used to endorse or promote products derived |
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* from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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/* |
/* |
* Copyright (c) 1982, 1986, 1988, 1990, 1993 |
* Copyright (c) 1982, 1986, 1988, 1990, 1993 |
* The Regents of the University of California. All rights reserved. |
* The Regents of the University of California. All rights reserved. |
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* @(#)uipc_socket.c 8.6 (Berkeley) 5/2/95 |
* @(#)uipc_socket.c 8.6 (Berkeley) 5/2/95 |
*/ |
*/ |
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#include "opt_compat_sunos.h" |
#include <sys/cdefs.h> |
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__KERNEL_RCSID(0, "$NetBSD$"); |
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#include "opt_sock_counters.h" |
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#include "opt_sosend_loan.h" |
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#include <sys/param.h> |
#include <sys/param.h> |
#include <sys/systm.h> |
#include <sys/systm.h> |
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#include <sys/signalvar.h> |
#include <sys/signalvar.h> |
#include <sys/resourcevar.h> |
#include <sys/resourcevar.h> |
#include <sys/pool.h> |
#include <sys/pool.h> |
#include <sys/event.h> |
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static void filt_sordetach(struct knote *kn); |
#include <uvm/uvm.h> |
static int filt_soread(struct knote *kn, long hint); |
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static void filt_sowdetach(struct knote *kn); |
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static int filt_sowrite(struct knote *kn, long hint); |
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static int filt_solisten(struct knote *kn, long hint); |
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static const struct filterops solisten_filtops = |
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{ 1, NULL, filt_sordetach, filt_solisten }; |
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const struct filterops soread_filtops = |
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{ 1, NULL, filt_sordetach, filt_soread }; |
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const struct filterops sowrite_filtops = |
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{ 1, NULL, filt_sowdetach, filt_sowrite }; |
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struct pool socket_pool; |
struct pool socket_pool; |
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extern int somaxconn; /* patchable (XXX sysctl) */ |
extern int somaxconn; /* patchable (XXX sysctl) */ |
int somaxconn = SOMAXCONN; |
int somaxconn = SOMAXCONN; |
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#ifdef SOSEND_COUNTERS |
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#include <sys/device.h> |
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struct evcnt sosend_loan_big = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, |
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NULL, "sosend", "loan big"); |
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struct evcnt sosend_copy_big = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, |
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NULL, "sosend", "copy big"); |
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struct evcnt sosend_copy_small = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, |
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NULL, "sosend", "copy small"); |
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struct evcnt sosend_kvalimit = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, |
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NULL, "sosend", "kva limit"); |
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#define SOSEND_COUNTER_INCR(ev) (ev)->ev_count++ |
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#else |
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#define SOSEND_COUNTER_INCR(ev) /* nothing */ |
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#endif /* SOSEND_COUNTERS */ |
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void |
void |
soinit(void) |
soinit(void) |
{ |
{ |
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pool_init(&socket_pool, sizeof(struct socket), 0, 0, 0, |
pool_init(&socket_pool, sizeof(struct socket), 0, 0, 0, |
"sockpl", 0, NULL, NULL, M_SOCKET); |
"sockpl", NULL); |
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#ifdef SOSEND_COUNTERS |
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evcnt_attach_static(&sosend_loan_big); |
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evcnt_attach_static(&sosend_copy_big); |
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evcnt_attach_static(&sosend_copy_small); |
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evcnt_attach_static(&sosend_kvalimit); |
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#endif /* SOSEND_COUNTERS */ |
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} |
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#ifdef SOSEND_LOAN |
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int use_sosend_loan = 1; |
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#else |
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int use_sosend_loan = 0; |
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#endif |
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struct mbuf *so_pendfree; |
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int somaxkva = 16 * 1024 * 1024; |
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int socurkva; |
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int sokvawaiters; |
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#define SOCK_LOAN_THRESH 4096 |
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#define SOCK_LOAN_CHUNK 65536 |
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static void |
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sodoloanfree(caddr_t buf, u_int size) |
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{ |
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struct vm_page **pgs; |
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vaddr_t va, sva, eva; |
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vsize_t len; |
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paddr_t pa; |
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int i, npgs; |
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eva = round_page((vaddr_t) buf + size); |
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sva = trunc_page((vaddr_t) buf); |
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len = eva - sva; |
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npgs = len >> PAGE_SHIFT; |
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pgs = alloca(npgs * sizeof(*pgs)); |
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for (i = 0, va = sva; va < eva; i++, va += PAGE_SIZE) { |
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if (pmap_extract(pmap_kernel(), va, &pa) == FALSE) |
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panic("sodoloanfree: va 0x%lx not mapped", va); |
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pgs[i] = PHYS_TO_VM_PAGE(pa); |
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} |
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pmap_kremove(sva, len); |
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pmap_update(pmap_kernel()); |
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uvm_unloan(pgs, npgs, UVM_LOAN_TOPAGE); |
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uvm_km_free(kernel_map, sva, len); |
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socurkva -= len; |
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if (sokvawaiters) |
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wakeup(&socurkva); |
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} |
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static size_t |
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sodopendfree(struct socket *so) |
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{ |
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struct mbuf *m; |
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size_t rv = 0; |
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int s; |
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s = splvm(); |
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for (;;) { |
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m = so_pendfree; |
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if (m == NULL) |
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break; |
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so_pendfree = m->m_next; |
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splx(s); |
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rv += m->m_ext.ext_size; |
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sodoloanfree(m->m_ext.ext_buf, m->m_ext.ext_size); |
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s = splvm(); |
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pool_cache_put(&mbpool_cache, m); |
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} |
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for (;;) { |
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m = so->so_pendfree; |
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if (m == NULL) |
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break; |
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so->so_pendfree = m->m_next; |
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splx(s); |
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rv += m->m_ext.ext_size; |
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sodoloanfree(m->m_ext.ext_buf, m->m_ext.ext_size); |
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s = splvm(); |
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pool_cache_put(&mbpool_cache, m); |
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} |
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splx(s); |
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return (rv); |
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} |
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static void |
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soloanfree(struct mbuf *m, caddr_t buf, u_int size, void *arg) |
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{ |
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struct socket *so = arg; |
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int s; |
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if (m == NULL) { |
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sodoloanfree(buf, size); |
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return; |
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} |
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s = splvm(); |
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m->m_next = so->so_pendfree; |
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so->so_pendfree = m; |
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splx(s); |
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if (sokvawaiters) |
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wakeup(&socurkva); |
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} |
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static long |
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sosend_loan(struct socket *so, struct uio *uio, struct mbuf *m, long space) |
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{ |
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struct iovec *iov = uio->uio_iov; |
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vaddr_t sva, eva; |
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vsize_t len; |
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struct vm_page **pgs; |
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vaddr_t lva, va; |
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int npgs, s, i, error; |
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if (uio->uio_segflg != UIO_USERSPACE) |
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return (0); |
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if (iov->iov_len < (size_t) space) |
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space = iov->iov_len; |
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if (space > SOCK_LOAN_CHUNK) |
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space = SOCK_LOAN_CHUNK; |
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eva = round_page((vaddr_t) iov->iov_base + space); |
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sva = trunc_page((vaddr_t) iov->iov_base); |
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len = eva - sva; |
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npgs = len >> PAGE_SHIFT; |
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while (socurkva + len > somaxkva) { |
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if (sodopendfree(so)) |
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continue; |
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SOSEND_COUNTER_INCR(&sosend_kvalimit); |
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s = splvm(); |
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sokvawaiters++; |
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(void) tsleep(&socurkva, PVM, "sokva", 0); |
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sokvawaiters--; |
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splx(s); |
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} |
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lva = uvm_km_valloc_wait(kernel_map, len); |
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if (lva == 0) |
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return (0); |
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socurkva += len; |
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pgs = alloca(npgs * sizeof(*pgs)); |
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error = uvm_loan(&uio->uio_procp->p_vmspace->vm_map, sva, len, |
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pgs, UVM_LOAN_TOPAGE); |
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if (error) { |
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uvm_km_free(kernel_map, lva, len); |
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socurkva -= len; |
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return (0); |
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} |
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for (i = 0, va = lva; i < npgs; i++, va += PAGE_SIZE) |
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pmap_kenter_pa(va, VM_PAGE_TO_PHYS(pgs[i]), VM_PROT_READ); |
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pmap_update(pmap_kernel()); |
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lva += (vaddr_t) iov->iov_base & PAGE_MASK; |
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MEXTADD(m, (caddr_t) lva, space, M_MBUF, soloanfree, so); |
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uio->uio_resid -= space; |
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/* uio_offset not updated, not set/used for write(2) */ |
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uio->uio_iov->iov_base = (caddr_t) uio->uio_iov->iov_base + space; |
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uio->uio_iov->iov_len -= space; |
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if (uio->uio_iov->iov_len == 0) { |
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uio->uio_iov++; |
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uio->uio_iovcnt--; |
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} |
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return (space); |
} |
} |
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/* |
/* |
Line 123 socreate(int dom, struct socket **aso, i |
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Line 351 socreate(int dom, struct socket **aso, i |
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splx(s); |
splx(s); |
return (error); |
return (error); |
} |
} |
#ifdef COMPAT_SUNOS |
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{ |
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extern struct emul emul_sunos; |
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if (p->p_emul == &emul_sunos && type == SOCK_DGRAM) |
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so->so_options |= SO_BROADCAST; |
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} |
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#endif |
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splx(s); |
splx(s); |
*aso = so; |
*aso = so; |
return (0); |
return (0); |
Line 159 solisten(struct socket *so, int backlog) |
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Line 380 solisten(struct socket *so, int backlog) |
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splx(s); |
splx(s); |
return (error); |
return (error); |
} |
} |
if (so->so_q.tqh_first == NULL) |
if (TAILQ_EMPTY(&so->so_q)) |
so->so_options |= SO_ACCEPTCONN; |
so->so_options |= SO_ACCEPTCONN; |
if (backlog < 0) |
if (backlog < 0) |
backlog = 0; |
backlog = 0; |
Line 171 solisten(struct socket *so, int backlog) |
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Line 392 solisten(struct socket *so, int backlog) |
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void |
void |
sofree(struct socket *so) |
sofree(struct socket *so) |
{ |
{ |
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struct mbuf *m; |
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if (so->so_pcb || (so->so_state & SS_NOFDREF) == 0) |
if (so->so_pcb || (so->so_state & SS_NOFDREF) == 0) |
return; |
return; |
Line 185 sofree(struct socket *so) |
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Line 407 sofree(struct socket *so) |
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} |
} |
sbrelease(&so->so_snd); |
sbrelease(&so->so_snd); |
sorflush(so); |
sorflush(so); |
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while ((m = so->so_pendfree) != NULL) { |
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so->so_pendfree = m->m_next; |
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m->m_next = so_pendfree; |
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so_pendfree = m; |
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} |
pool_put(&socket_pool, so); |
pool_put(&socket_pool, so); |
} |
} |
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Line 202 soclose(struct socket *so) |
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Line 429 soclose(struct socket *so) |
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error = 0; |
error = 0; |
s = splsoftnet(); /* conservative */ |
s = splsoftnet(); /* conservative */ |
if (so->so_options & SO_ACCEPTCONN) { |
if (so->so_options & SO_ACCEPTCONN) { |
while ((so2 = so->so_q0.tqh_first) != 0) { |
while ((so2 = TAILQ_FIRST(&so->so_q0)) != 0) { |
(void) soqremque(so2, 0); |
(void) soqremque(so2, 0); |
(void) soabort(so2); |
(void) soabort(so2); |
} |
} |
while ((so2 = so->so_q.tqh_first) != 0) { |
while ((so2 = TAILQ_FIRST(&so->so_q)) != 0) { |
(void) soqremque(so2, 1); |
(void) soqremque(so2, 1); |
(void) soabort(so2); |
(void) soabort(so2); |
} |
} |
Line 340 sodisconnect(struct socket *so) |
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Line 567 sodisconnect(struct socket *so) |
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(struct proc *)0); |
(struct proc *)0); |
bad: |
bad: |
splx(s); |
splx(s); |
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sodopendfree(so); |
return (error); |
return (error); |
} |
} |
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Line 367 sosend(struct socket *so, struct mbuf *a |
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Line 595 sosend(struct socket *so, struct mbuf *a |
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{ |
{ |
struct proc *p; |
struct proc *p; |
struct mbuf **mp, *m; |
struct mbuf **mp, *m; |
long space, len, resid; |
long space, len, resid, clen, mlen; |
int clen, error, s, dontroute, mlen, atomic; |
int error, s, dontroute, atomic; |
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sodopendfree(so); |
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p = curproc; /* XXX */ |
p = curproc; /* XXX */ |
clen = 0; |
clen = 0; |
Line 455 sosend(struct socket *so, struct mbuf *a |
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Line 685 sosend(struct socket *so, struct mbuf *a |
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MGET(m, M_WAIT, MT_DATA); |
MGET(m, M_WAIT, MT_DATA); |
mlen = MLEN; |
mlen = MLEN; |
} |
} |
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if (use_sosend_loan && |
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uio->uio_iov->iov_len >= SOCK_LOAN_THRESH && |
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space >= SOCK_LOAN_THRESH && |
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(len = sosend_loan(so, uio, m, |
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space)) != 0) { |
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SOSEND_COUNTER_INCR(&sosend_loan_big); |
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space -= len; |
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goto have_data; |
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} |
if (resid >= MINCLSIZE && space >= MCLBYTES) { |
if (resid >= MINCLSIZE && space >= MCLBYTES) { |
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SOSEND_COUNTER_INCR(&sosend_copy_big); |
MCLGET(m, M_WAIT); |
MCLGET(m, M_WAIT); |
if ((m->m_flags & M_EXT) == 0) |
if ((m->m_flags & M_EXT) == 0) |
goto nopages; |
goto nopages; |
mlen = MCLBYTES; |
mlen = MCLBYTES; |
#ifdef MAPPED_MBUFS |
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len = min(MCLBYTES, resid); |
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#else |
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if (atomic && top == 0) { |
if (atomic && top == 0) { |
len = min(MCLBYTES - max_hdr, |
len = lmin(MCLBYTES - max_hdr, |
resid); |
resid); |
m->m_data += max_hdr; |
m->m_data += max_hdr; |
} else |
} else |
len = min(MCLBYTES, resid); |
len = lmin(MCLBYTES, resid); |
#endif |
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space -= len; |
space -= len; |
} else { |
} else { |
nopages: |
nopages: |
len = min(min(mlen, resid), space); |
SOSEND_COUNTER_INCR(&sosend_copy_small); |
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len = lmin(lmin(mlen, resid), space); |
space -= len; |
space -= len; |
/* |
/* |
* For datagram protocols, leave room |
* For datagram protocols, leave room |
|
|
} |
} |
error = uiomove(mtod(m, caddr_t), (int)len, |
error = uiomove(mtod(m, caddr_t), (int)len, |
uio); |
uio); |
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have_data: |
resid = uio->uio_resid; |
resid = uio->uio_resid; |
m->m_len = len; |
m->m_len = len; |
*mp = m; |
*mp = m; |
Line 560 soreceive(struct socket *so, struct mbuf |
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Line 798 soreceive(struct socket *so, struct mbuf |
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struct protosw *pr; |
struct protosw *pr; |
struct mbuf *nextrecord; |
struct mbuf *nextrecord; |
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|
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sodopendfree(so); |
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pr = so->so_proto; |
pr = so->so_proto; |
mp = mp0; |
mp = mp0; |
type = 0; |
type = 0; |
Line 750 soreceive(struct socket *so, struct mbuf |
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Line 990 soreceive(struct socket *so, struct mbuf |
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splx(s); |
splx(s); |
error = uiomove(mtod(m, caddr_t) + moff, (int)len, uio); |
error = uiomove(mtod(m, caddr_t) + moff, (int)len, uio); |
s = splsoftnet(); |
s = splsoftnet(); |
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if (error) |
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goto release; |
} else |
} else |
uio->uio_resid -= len; |
uio->uio_resid -= len; |
if (len == m->m_len - moff) { |
if (len == m->m_len - moff) { |
Line 1122 sohasoutofband(struct socket *so) |
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Line 1364 sohasoutofband(struct socket *so) |
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psignal(p, SIGURG); |
psignal(p, SIGURG); |
selwakeup(&so->so_rcv.sb_sel); |
selwakeup(&so->so_rcv.sb_sel); |
} |
} |
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int |
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soo_kqfilter(struct file *fp, struct knote *kn) |
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{ |
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struct socket *so; |
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struct sockbuf *sb; |
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int s; |
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so = (struct socket *)kn->kn_fp->f_data; |
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switch (kn->kn_filter) { |
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case EVFILT_READ: |
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if (so->so_options & SO_ACCEPTCONN) |
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kn->kn_fop = &solisten_filtops; |
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else |
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kn->kn_fop = &soread_filtops; |
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sb = &so->so_rcv; |
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break; |
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case EVFILT_WRITE: |
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kn->kn_fop = &sowrite_filtops; |
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sb = &so->so_snd; |
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break; |
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default: |
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return (1); |
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} |
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s = splnet(); /* XXXLUKEM: maybe splsoftnet() ? */ |
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SLIST_INSERT_HEAD(&sb->sb_sel.si_klist, kn, kn_selnext); |
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sb->sb_flags |= SB_KNOTE; |
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splx(s); |
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return (0); |
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} |
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static void |
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filt_sordetach(struct knote *kn) |
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{ |
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struct socket *so; |
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int s; |
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|
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so = (struct socket *)kn->kn_fp->f_data; |
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s = splnet(); /* XXXLUKEM: maybe splsoftnet() ? */ |
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SLIST_REMOVE(&so->so_rcv.sb_sel.si_klist, kn, knote, kn_selnext); |
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if (SLIST_EMPTY(&so->so_rcv.sb_sel.si_klist)) |
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so->so_rcv.sb_flags &= ~SB_KNOTE; |
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splx(s); |
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} |
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|
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/*ARGSUSED*/ |
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static int |
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filt_soread(struct knote *kn, long hint) |
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{ |
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struct socket *so; |
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|
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so = (struct socket *)kn->kn_fp->f_data; |
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kn->kn_data = so->so_rcv.sb_cc; |
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if (so->so_state & SS_CANTRCVMORE) { |
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kn->kn_flags |= EV_EOF; |
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kn->kn_fflags = so->so_error; |
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return (1); |
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} |
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if (so->so_error) /* temporary udp error */ |
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return (1); |
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if (kn->kn_sfflags & NOTE_LOWAT) |
|
return (kn->kn_data >= kn->kn_sdata); |
|
return (kn->kn_data >= so->so_rcv.sb_lowat); |
|
} |
|
|
|
static void |
|
filt_sowdetach(struct knote *kn) |
|
{ |
|
struct socket *so; |
|
int s; |
|
|
|
so = (struct socket *)kn->kn_fp->f_data; |
|
s = splnet(); /* XXXLUKEM: maybe splsoftnet() ? */ |
|
SLIST_REMOVE(&so->so_snd.sb_sel.si_klist, kn, knote, kn_selnext); |
|
if (SLIST_EMPTY(&so->so_snd.sb_sel.si_klist)) |
|
so->so_snd.sb_flags &= ~SB_KNOTE; |
|
splx(s); |
|
} |
|
|
|
/*ARGSUSED*/ |
|
static int |
|
filt_sowrite(struct knote *kn, long hint) |
|
{ |
|
struct socket *so; |
|
|
|
so = (struct socket *)kn->kn_fp->f_data; |
|
kn->kn_data = sbspace(&so->so_snd); |
|
if (so->so_state & SS_CANTSENDMORE) { |
|
kn->kn_flags |= EV_EOF; |
|
kn->kn_fflags = so->so_error; |
|
return (1); |
|
} |
|
if (so->so_error) /* temporary udp error */ |
|
return (1); |
|
if (((so->so_state & SS_ISCONNECTED) == 0) && |
|
(so->so_proto->pr_flags & PR_CONNREQUIRED)) |
|
return (0); |
|
if (kn->kn_sfflags & NOTE_LOWAT) |
|
return (kn->kn_data >= kn->kn_sdata); |
|
return (kn->kn_data >= so->so_snd.sb_lowat); |
|
} |
|
|
|
/*ARGSUSED*/ |
|
static int |
|
filt_solisten(struct knote *kn, long hint) |
|
{ |
|
struct socket *so; |
|
|
|
so = (struct socket *)kn->kn_fp->f_data; |
|
#if 0 |
|
/* |
|
* XXXLUKEM: this was freebsd's code. it appears that they |
|
* XXXLUKEM: modified the socket code to store the count |
|
* XXXLUKEM: of all connections in so_qlen, and separately |
|
* XXXLUKEM: track the number of incompletes in so_incqlen. |
|
* XXXLUKEM: as we appear to keep only completed connections |
|
* XXXLUKEM: on so_qlen we can just return that. |
|
* XXXLUKEM: that said, a socket guru should double check for me :) |
|
*/ |
|
kn->kn_data = so->so_qlen - so->so_incqlen; |
|
return (! TAILQ_EMPTY(&so->so_comp)); |
|
#else |
|
kn->kn_data = so->so_qlen; |
|
return (kn->kn_data > 0); |
|
#endif |
|
} |
|