2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 2007-2009 Google Inc. and Amit Singh
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are
11 * * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * * Redistributions in binary form must reproduce the above
14 * copyright notice, this list of conditions and the following disclaimer
15 * in the documentation and/or other materials provided with the
17 * * Neither the name of Google Inc. nor the names of its
18 * contributors may be used to endorse or promote products derived from
19 * this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 * Copyright (C) 2005 Csaba Henk.
34 * All rights reserved.
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
45 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
46 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
47 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
48 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
49 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
50 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
51 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
52 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
53 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
54 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58 #include <sys/cdefs.h>
59 __FBSDID("$FreeBSD$");
61 #include <sys/param.h>
62 #include <sys/module.h>
63 #include <sys/systm.h>
64 #include <sys/errno.h>
65 #include <sys/kernel.h>
68 #include <sys/malloc.h>
69 #include <sys/queue.h>
72 #include <sys/mutex.h>
74 #include <sys/mount.h>
76 #include <sys/vnode.h>
77 #include <sys/signalvar.h>
78 #include <sys/syscallsubr.h>
79 #include <sys/sysctl.h>
83 #include "fuse_node.h"
85 #include "fuse_internal.h"
87 SDT_PROVIDER_DECLARE(fuse);
90 * arg0: verbosity. Higher numbers give more verbose messages
91 * arg1: Textual message
93 SDT_PROBE_DEFINE2(fuse, , ipc, trace, "int", "char*");
95 static void fiov_clear(struct fuse_iov *fiov);
96 static struct fuse_ticket *fticket_alloc(struct fuse_data *data);
97 static void fticket_refresh(struct fuse_ticket *ftick);
98 static void fticket_destroy(struct fuse_ticket *ftick);
99 static int fticket_wait_answer(struct fuse_ticket *ftick);
101 fticket_aw_pull_uio(struct fuse_ticket *ftick,
104 static int fuse_body_audit(struct fuse_ticket *ftick, size_t blen);
106 static fuse_handler_t fuse_standard_handler;
108 SYSCTL_NODE(_vfs, OID_AUTO, fusefs, CTLFLAG_RW, 0, "FUSE tunables");
109 SYSCTL_STRING(_vfs_fusefs, OID_AUTO, version, CTLFLAG_RD,
110 FUSE_FREEBSD_VERSION, 0, "fuse-freebsd version");
111 static int fuse_ticket_count = 0;
113 SYSCTL_INT(_vfs_fusefs, OID_AUTO, ticket_count, CTLFLAG_RW,
114 &fuse_ticket_count, 0, "number of allocated tickets");
115 static long fuse_iov_permanent_bufsize = 1 << 19;
117 SYSCTL_LONG(_vfs_fusefs, OID_AUTO, iov_permanent_bufsize, CTLFLAG_RW,
118 &fuse_iov_permanent_bufsize, 0,
119 "limit for permanently stored buffer size for fuse_iovs");
120 static int fuse_iov_credit = 16;
122 SYSCTL_INT(_vfs_fusefs, OID_AUTO, iov_credit, CTLFLAG_RW,
124 "how many times is an oversized fuse_iov tolerated");
126 MALLOC_DEFINE(M_FUSEMSG, "fuse_msgbuf", "fuse message buffer");
127 static uma_zone_t ticket_zone;
130 fuse_block_sigs(sigset_t *oldset)
135 SIGDELSET(newset, SIGKILL);
136 if (kern_sigprocmask(curthread, SIG_BLOCK, &newset, oldset, 0))
137 panic("%s: Invalid operation for kern_sigprocmask()",
142 fuse_restore_sigs(sigset_t *oldset)
145 if (kern_sigprocmask(curthread, SIG_SETMASK, oldset, NULL, 0))
146 panic("%s: Invalid operation for kern_sigprocmask()",
151 fiov_init(struct fuse_iov *fiov, size_t size)
153 uint32_t msize = FU_AT_LEAST(size);
157 fiov->base = malloc(msize, M_FUSEMSG, M_WAITOK | M_ZERO);
159 fiov->allocated_size = msize;
160 fiov->credit = fuse_iov_credit;
164 fiov_teardown(struct fuse_iov *fiov)
166 MPASS(fiov->base != NULL);
167 free(fiov->base, M_FUSEMSG);
171 fiov_adjust(struct fuse_iov *fiov, size_t size)
173 if (fiov->allocated_size < size ||
174 (fuse_iov_permanent_bufsize >= 0 &&
175 fiov->allocated_size - size > fuse_iov_permanent_bufsize &&
176 --fiov->credit < 0)) {
178 fiov->base = realloc(fiov->base, FU_AT_LEAST(size), M_FUSEMSG,
181 panic("FUSE: realloc failed");
183 fiov->allocated_size = FU_AT_LEAST(size);
184 fiov->credit = fuse_iov_credit;
185 /* Clear data buffer after reallocation */
186 bzero(fiov->base, size);
187 } else if (size > fiov->len) {
188 /* Clear newly extended portion of data buffer */
189 bzero((char*)fiov->base + fiov->len, size - fiov->len);
194 /* Clear the fiov's data buffer */
196 fiov_clear(struct fuse_iov *fiov)
198 bzero(fiov->base, fiov->len);
201 /* Resize the fiov if needed, and clear it's buffer */
203 fiov_refresh(struct fuse_iov *fiov)
205 fiov_adjust(fiov, 0);
209 fticket_ctor(void *mem, int size, void *arg, int flags)
211 struct fuse_ticket *ftick = mem;
212 struct fuse_data *data = arg;
214 FUSE_ASSERT_MS_DONE(ftick);
215 FUSE_ASSERT_AW_DONE(ftick);
217 ftick->tk_data = data;
219 if (ftick->tk_unique != 0)
220 fticket_refresh(ftick);
222 /* May be truncated to 32 bits */
223 ftick->tk_unique = atomic_fetchadd_long(&data->ticketer, 1);
224 if (ftick->tk_unique == 0)
225 ftick->tk_unique = atomic_fetchadd_long(&data->ticketer, 1);
227 refcount_init(&ftick->tk_refcount, 1);
228 atomic_add_acq_int(&fuse_ticket_count, 1);
234 fticket_dtor(void *mem, int size, void *arg)
237 struct fuse_ticket *ftick = mem;
240 FUSE_ASSERT_MS_DONE(ftick);
241 FUSE_ASSERT_AW_DONE(ftick);
243 atomic_subtract_acq_int(&fuse_ticket_count, 1);
247 fticket_init(void *mem, int size, int flags)
249 struct fuse_ticket *ftick = mem;
251 bzero(ftick, sizeof(struct fuse_ticket));
253 fiov_init(&ftick->tk_ms_fiov, sizeof(struct fuse_in_header));
254 ftick->tk_ms_type = FT_M_FIOV;
256 mtx_init(&ftick->tk_aw_mtx, "fuse answer delivery mutex", NULL, MTX_DEF);
257 fiov_init(&ftick->tk_aw_fiov, 0);
258 ftick->tk_aw_type = FT_A_FIOV;
264 fticket_fini(void *mem, int size)
266 struct fuse_ticket *ftick = mem;
268 fiov_teardown(&ftick->tk_ms_fiov);
269 fiov_teardown(&ftick->tk_aw_fiov);
270 mtx_destroy(&ftick->tk_aw_mtx);
273 static inline struct fuse_ticket *
274 fticket_alloc(struct fuse_data *data)
276 return uma_zalloc_arg(ticket_zone, data, M_WAITOK);
280 fticket_destroy(struct fuse_ticket *ftick)
282 return uma_zfree(ticket_zone, ftick);
287 fticket_refresh(struct fuse_ticket *ftick)
289 FUSE_ASSERT_MS_DONE(ftick);
290 FUSE_ASSERT_AW_DONE(ftick);
292 fiov_refresh(&ftick->tk_ms_fiov);
293 ftick->tk_ms_bufdata = NULL;
294 ftick->tk_ms_bufsize = 0;
295 ftick->tk_ms_type = FT_M_FIOV;
297 bzero(&ftick->tk_aw_ohead, sizeof(struct fuse_out_header));
299 fiov_refresh(&ftick->tk_aw_fiov);
300 ftick->tk_aw_errno = 0;
301 ftick->tk_aw_bufdata = NULL;
302 ftick->tk_aw_bufsize = 0;
303 ftick->tk_aw_type = FT_A_FIOV;
308 /* Prepar the ticket to be reused, but don't clear its data buffers */
310 fticket_reset(struct fuse_ticket *ftick)
312 FUSE_ASSERT_MS_DONE(ftick);
313 FUSE_ASSERT_AW_DONE(ftick);
315 ftick->tk_ms_bufdata = NULL;
316 ftick->tk_ms_bufsize = 0;
317 ftick->tk_ms_type = FT_M_FIOV;
319 bzero(&ftick->tk_aw_ohead, sizeof(struct fuse_out_header));
321 ftick->tk_aw_errno = 0;
322 ftick->tk_aw_bufdata = NULL;
323 ftick->tk_aw_bufsize = 0;
324 ftick->tk_aw_type = FT_A_FIOV;
330 fticket_wait_answer(struct fuse_ticket *ftick)
334 struct fuse_data *data;
336 fuse_lck_mtx_lock(ftick->tk_aw_mtx);
338 if (fticket_answered(ftick)) {
341 data = ftick->tk_data;
343 if (fdata_get_dead(data)) {
345 fticket_set_answered(ftick);
348 fuse_block_sigs(&tset);
349 err = msleep(ftick, &ftick->tk_aw_mtx, PCATCH, "fu_ans",
350 data->daemon_timeout * hz);
351 fuse_restore_sigs(&tset);
352 if (err == EAGAIN) { /* same as EWOULDBLOCK */
353 #ifdef XXXIP /* die conditionally */
354 if (!fdata_get_dead(data)) {
355 fdata_set_dead(data);
359 fticket_set_answered(ftick);
362 if (!(err || fticket_answered(ftick))) {
363 SDT_PROBE2(fuse, , ipc, trace, 1,
364 "FUSE: requester was woken up but still no answer");
367 fuse_lck_mtx_unlock(ftick->tk_aw_mtx);
374 fticket_aw_pull_uio(struct fuse_ticket *ftick, struct uio *uio)
377 size_t len = uio_resid(uio);
380 switch (ftick->tk_aw_type) {
382 fiov_adjust(fticket_resp(ftick), len);
383 err = uiomove(fticket_resp(ftick)->base, len, uio);
387 ftick->tk_aw_bufsize = len;
388 err = uiomove(ftick->tk_aw_bufdata, len, uio);
392 panic("FUSE: unknown answer type for ticket %p", ftick);
399 fticket_pull(struct fuse_ticket *ftick, struct uio *uio)
403 if (ftick->tk_aw_ohead.error) {
406 err = fuse_body_audit(ftick, uio_resid(uio));
408 err = fticket_aw_pull_uio(ftick, uio);
414 fdata_alloc(struct cdev *fdev, struct ucred *cred)
416 struct fuse_data *data;
418 data = malloc(sizeof(struct fuse_data), M_FUSEMSG, M_WAITOK | M_ZERO);
421 mtx_init(&data->ms_mtx, "fuse message list mutex", NULL, MTX_DEF);
422 STAILQ_INIT(&data->ms_head);
423 mtx_init(&data->aw_mtx, "fuse answer list mutex", NULL, MTX_DEF);
424 TAILQ_INIT(&data->aw_head);
425 data->daemoncred = crhold(cred);
426 data->daemon_timeout = FUSE_DEFAULT_DAEMON_TIMEOUT;
427 sx_init(&data->rename_lock, "fuse rename lock");
434 fdata_trydestroy(struct fuse_data *data)
437 MPASS(data->ref >= 0);
441 /* Driving off stage all that stuff thrown at device... */
442 mtx_destroy(&data->ms_mtx);
443 mtx_destroy(&data->aw_mtx);
444 sx_destroy(&data->rename_lock);
446 crfree(data->daemoncred);
448 free(data, M_FUSEMSG);
452 fdata_set_dead(struct fuse_data *data)
455 if (fdata_get_dead(data)) {
459 fuse_lck_mtx_lock(data->ms_mtx);
460 data->dataflags |= FSESS_DEAD;
462 selwakeuppri(&data->ks_rsel, PZERO + 1);
463 wakeup(&data->ticketer);
464 fuse_lck_mtx_unlock(data->ms_mtx);
469 fuse_ticket_fetch(struct fuse_data *data)
472 struct fuse_ticket *ftick;
474 ftick = fticket_alloc(data);
476 if (!(data->dataflags & FSESS_INITED)) {
477 /* Sleep until get answer for INIT messsage */
479 if (!(data->dataflags & FSESS_INITED) && data->ticketer > 2) {
480 err = msleep(&data->ticketer, &fuse_mtx, PCATCH | PDROP,
483 fdata_set_dead(data);
491 fuse_ticket_drop(struct fuse_ticket *ftick)
495 die = refcount_release(&ftick->tk_refcount);
497 fticket_destroy(ftick);
503 fuse_insert_callback(struct fuse_ticket *ftick, fuse_handler_t * handler)
505 if (fdata_get_dead(ftick->tk_data)) {
508 ftick->tk_aw_handler = handler;
510 fuse_lck_mtx_lock(ftick->tk_data->aw_mtx);
512 fuse_lck_mtx_unlock(ftick->tk_data->aw_mtx);
516 fuse_insert_message(struct fuse_ticket *ftick)
518 if (ftick->tk_flag & FT_DIRTY) {
519 panic("FUSE: ticket reused without being refreshed");
521 ftick->tk_flag |= FT_DIRTY;
523 if (fdata_get_dead(ftick->tk_data)) {
526 fuse_lck_mtx_lock(ftick->tk_data->ms_mtx);
528 wakeup_one(ftick->tk_data);
529 selwakeuppri(&ftick->tk_data->ks_rsel, PZERO + 1);
530 fuse_lck_mtx_unlock(ftick->tk_data->ms_mtx);
534 fuse_body_audit(struct fuse_ticket *ftick, size_t blen)
537 enum fuse_opcode opcode;
539 opcode = fticket_opcode(ftick);
543 err = (blen == sizeof(struct fuse_entry_out)) ? 0 : EINVAL;
547 panic("FUSE: a handler has been intalled for FUSE_FORGET");
551 err = (blen == sizeof(struct fuse_attr_out)) ? 0 : EINVAL;
555 err = (blen == sizeof(struct fuse_attr_out)) ? 0 : EINVAL;
559 err = (PAGE_SIZE >= blen) ? 0 : EINVAL;
563 err = (blen == sizeof(struct fuse_entry_out)) ? 0 : EINVAL;
567 err = (blen == sizeof(struct fuse_entry_out)) ? 0 : EINVAL;
571 err = (blen == sizeof(struct fuse_entry_out)) ? 0 : EINVAL;
575 err = (blen == 0) ? 0 : EINVAL;
579 err = (blen == 0) ? 0 : EINVAL;
583 err = (blen == 0) ? 0 : EINVAL;
587 err = (blen == sizeof(struct fuse_entry_out)) ? 0 : EINVAL;
591 err = (blen == sizeof(struct fuse_open_out)) ? 0 : EINVAL;
595 err = (((struct fuse_read_in *)(
596 (char *)ftick->tk_ms_fiov.base +
597 sizeof(struct fuse_in_header)
598 ))->size >= blen) ? 0 : EINVAL;
602 err = (blen == sizeof(struct fuse_write_out)) ? 0 : EINVAL;
606 if (fuse_libabi_geq(ftick->tk_data, 7, 4)) {
607 err = (blen == sizeof(struct fuse_statfs_out)) ?
610 err = (blen == FUSE_COMPAT_STATFS_SIZE) ? 0 : EINVAL;
615 err = (blen == 0) ? 0 : EINVAL;
619 err = (blen == 0) ? 0 : EINVAL;
623 err = (blen == 0) ? 0 : EINVAL;
629 * These can have varying response lengths, and 0 length
630 * isn't necessarily invalid.
635 case FUSE_REMOVEXATTR:
636 err = (blen == 0) ? 0 : EINVAL;
640 err = (blen == 0) ? 0 : EINVAL;
644 if (blen == sizeof(struct fuse_init_out) || blen == 8) {
652 err = (blen == sizeof(struct fuse_open_out)) ? 0 : EINVAL;
656 err = (((struct fuse_read_in *)(
657 (char *)ftick->tk_ms_fiov.base +
658 sizeof(struct fuse_in_header)
659 ))->size >= blen) ? 0 : EINVAL;
662 case FUSE_RELEASEDIR:
663 err = (blen == 0) ? 0 : EINVAL;
667 err = (blen == 0) ? 0 : EINVAL;
671 panic("FUSE: no response body format check for FUSE_GETLK");
675 panic("FUSE: no response body format check for FUSE_SETLK");
679 panic("FUSE: no response body format check for FUSE_SETLKW");
683 err = (blen == 0) ? 0 : EINVAL;
687 err = (blen == sizeof(struct fuse_entry_out) +
688 sizeof(struct fuse_open_out)) ? 0 : EINVAL;
692 err = (blen == 0) ? 0 : EINVAL;
696 panic("FUSE: opcodes out of sync (%d)\n", opcode);
703 fuse_setup_ihead(struct fuse_in_header *ihead, struct fuse_ticket *ftick,
704 uint64_t nid, enum fuse_opcode op, size_t blen, pid_t pid,
707 ihead->len = sizeof(*ihead) + blen;
708 ihead->unique = ftick->tk_unique;
713 ihead->uid = cred->cr_uid;
714 ihead->gid = cred->cr_rgid;
718 * fuse_standard_handler just pulls indata and wakes up pretender.
719 * Doesn't try to interpret data, that's left for the pretender.
720 * Though might do a basic size verification before the pull-in takes place
724 fuse_standard_handler(struct fuse_ticket *ftick, struct uio *uio)
728 err = fticket_pull(ftick, uio);
730 fuse_lck_mtx_lock(ftick->tk_aw_mtx);
732 if (!fticket_answered(ftick)) {
733 fticket_set_answered(ftick);
734 ftick->tk_aw_errno = err;
737 fuse_lck_mtx_unlock(ftick->tk_aw_mtx);
743 * Reinitialize a dispatcher from a pid and node id, without resizing or
744 * clearing its data buffers
747 fdisp_refresh_pid(struct fuse_dispatcher *fdip, enum fuse_opcode op,
748 struct mount *mp, uint64_t nid, pid_t pid, struct ucred *cred)
751 MPASS2(sizeof(fdip->finh) + fdip->iosize <= fdip->tick->tk_ms_fiov.len,
752 "Must use fdisp_make_pid to increase the size of the fiov");
753 fticket_reset(fdip->tick);
755 FUSE_DIMALLOC(&fdip->tick->tk_ms_fiov, fdip->finh,
756 fdip->indata, fdip->iosize);
758 fuse_setup_ihead(fdip->finh, fdip->tick, nid, op, fdip->iosize, pid,
762 /* Initialize a dispatcher from a pid and node id */
764 fdisp_make_pid(struct fuse_dispatcher *fdip, enum fuse_opcode op,
765 struct mount *mp, uint64_t nid, pid_t pid, struct ucred *cred)
767 struct fuse_data *data = fuse_get_mpdata(mp);
770 fticket_refresh(fdip->tick);
772 fdip->tick = fuse_ticket_fetch(data);
775 /* FUSE_DIMALLOC will bzero the fiovs when it enlarges them */
776 FUSE_DIMALLOC(&fdip->tick->tk_ms_fiov, fdip->finh,
777 fdip->indata, fdip->iosize);
779 fuse_setup_ihead(fdip->finh, fdip->tick, nid, op, fdip->iosize, pid, cred);
783 fdisp_make(struct fuse_dispatcher *fdip, enum fuse_opcode op, struct mount *mp,
784 uint64_t nid, struct thread *td, struct ucred *cred)
786 RECTIFY_TDCR(td, cred);
788 return fdisp_make_pid(fdip, op, mp, nid, td->td_proc->p_pid, cred);
792 fdisp_make_vp(struct fuse_dispatcher *fdip, enum fuse_opcode op,
793 struct vnode *vp, struct thread *td, struct ucred *cred)
795 RECTIFY_TDCR(td, cred);
796 return fdisp_make_pid(fdip, op, vnode_mount(vp), VTOI(vp),
797 td->td_proc->p_pid, cred);
800 /* Refresh a fuse_dispatcher so it can be reused, but don't zero its data */
802 fdisp_refresh_vp(struct fuse_dispatcher *fdip, enum fuse_opcode op,
803 struct vnode *vp, struct thread *td, struct ucred *cred)
805 RECTIFY_TDCR(td, cred);
806 return fdisp_refresh_pid(fdip, op, vnode_mount(vp), VTOI(vp),
807 td->td_proc->p_pid, cred);
811 fdisp_refresh(struct fuse_dispatcher *fdip)
813 fticket_refresh(fdip->tick);
816 SDT_PROBE_DEFINE2(fuse, , ipc, fdisp_wait_answ_error, "char*", "int");
819 fdisp_wait_answ(struct fuse_dispatcher *fdip)
824 fuse_insert_callback(fdip->tick, fuse_standard_handler);
825 fuse_insert_message(fdip->tick);
827 if ((err = fticket_wait_answer(fdip->tick))) {
828 fuse_lck_mtx_lock(fdip->tick->tk_aw_mtx);
830 if (fticket_answered(fdip->tick)) {
832 * Just between noticing the interrupt and getting here,
833 * the standard handler has completed his job.
834 * So we drop the ticket and exit as usual.
836 SDT_PROBE2(fuse, , ipc, fdisp_wait_answ_error,
837 "IPC: interrupted, already answered", err);
838 fuse_lck_mtx_unlock(fdip->tick->tk_aw_mtx);
842 * So we were faster than the standard handler.
843 * Then by setting the answered flag we get *him*
844 * to drop the ticket.
846 SDT_PROBE2(fuse, , ipc, fdisp_wait_answ_error,
847 "IPC: interrupted, setting to answered", err);
848 fticket_set_answered(fdip->tick);
849 fuse_lck_mtx_unlock(fdip->tick->tk_aw_mtx);
854 if (fdip->tick->tk_aw_errno) {
855 SDT_PROBE2(fuse, , ipc, fdisp_wait_answ_error,
856 "IPC: explicit EIO-ing", fdip->tick->tk_aw_errno);
860 if ((err = fdip->tick->tk_aw_ohead.error)) {
861 SDT_PROBE2(fuse, , ipc, fdisp_wait_answ_error,
862 "IPC: setting status", fdip->tick->tk_aw_ohead.error);
864 * This means a "proper" fuse syscall error.
865 * We record this value so the caller will
866 * be able to know it's not a boring messaging
867 * failure, if she wishes so (and if not, she can
868 * just simply propagate the return value of this routine).
869 * [XXX Maybe a bitflag would do the job too,
870 * if other flags needed, this will be converted thusly.]
872 fdip->answ_stat = err;
875 fdip->answ = fticket_resp(fdip->tick)->base;
876 fdip->iosize = fticket_resp(fdip->tick)->len;
887 ticket_zone = uma_zcreate("fuse_ticket", sizeof(struct fuse_ticket),
888 fticket_ctor, fticket_dtor, fticket_init, fticket_fini,
893 fuse_ipc_destroy(void)
895 uma_zdestroy(ticket_zone);