151369649SPedro F. Giffuni /*- 251369649SPedro F. Giffuni * SPDX-License-Identifier: BSD-3-Clause 351369649SPedro F. Giffuni * 45fe58019SAttilio Rao * Copyright (c) 2007-2009 Google Inc. and Amit Singh 55fe58019SAttilio Rao * All rights reserved. 65fe58019SAttilio Rao * 75fe58019SAttilio Rao * Redistribution and use in source and binary forms, with or without 85fe58019SAttilio Rao * modification, are permitted provided that the following conditions are 95fe58019SAttilio Rao * met: 105fe58019SAttilio Rao * 115fe58019SAttilio Rao * * Redistributions of source code must retain the above copyright 125fe58019SAttilio Rao * notice, this list of conditions and the following disclaimer. 135fe58019SAttilio Rao * * Redistributions in binary form must reproduce the above 145fe58019SAttilio Rao * copyright notice, this list of conditions and the following disclaimer 155fe58019SAttilio Rao * in the documentation and/or other materials provided with the 165fe58019SAttilio Rao * distribution. 175fe58019SAttilio Rao * * Neither the name of Google Inc. nor the names of its 185fe58019SAttilio Rao * contributors may be used to endorse or promote products derived from 195fe58019SAttilio Rao * this software without specific prior written permission. 205fe58019SAttilio Rao * 215fe58019SAttilio Rao * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 225fe58019SAttilio Rao * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 235fe58019SAttilio Rao * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 245fe58019SAttilio Rao * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 255fe58019SAttilio Rao * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 265fe58019SAttilio Rao * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 275fe58019SAttilio Rao * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 285fe58019SAttilio Rao * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 295fe58019SAttilio Rao * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 305fe58019SAttilio Rao * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 315fe58019SAttilio Rao * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 325fe58019SAttilio Rao * 335fe58019SAttilio Rao * Copyright (C) 2005 Csaba Henk. 345fe58019SAttilio Rao * All rights reserved. 355fe58019SAttilio Rao * 365fe58019SAttilio Rao * Redistribution and use in source and binary forms, with or without 375fe58019SAttilio Rao * modification, are permitted provided that the following conditions 385fe58019SAttilio Rao * are met: 395fe58019SAttilio Rao * 1. Redistributions of source code must retain the above copyright 405fe58019SAttilio Rao * notice, this list of conditions and the following disclaimer. 415fe58019SAttilio Rao * 2. Redistributions in binary form must reproduce the above copyright 425fe58019SAttilio Rao * notice, this list of conditions and the following disclaimer in the 435fe58019SAttilio Rao * documentation and/or other materials provided with the distribution. 445fe58019SAttilio Rao * 455fe58019SAttilio Rao * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 465fe58019SAttilio Rao * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 475fe58019SAttilio Rao * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 485fe58019SAttilio Rao * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 495fe58019SAttilio Rao * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 505fe58019SAttilio Rao * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 515fe58019SAttilio Rao * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 525fe58019SAttilio Rao * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 535fe58019SAttilio Rao * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 545fe58019SAttilio Rao * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 555fe58019SAttilio Rao * SUCH DAMAGE. 565fe58019SAttilio Rao * 575fe58019SAttilio Rao * $FreeBSD$ 585fe58019SAttilio Rao */ 595fe58019SAttilio Rao 605fe58019SAttilio Rao #ifndef _FUSE_IPC_H_ 615fe58019SAttilio Rao #define _FUSE_IPC_H_ 625fe58019SAttilio Rao 635fe58019SAttilio Rao #include <sys/param.h> 645fe58019SAttilio Rao #include <sys/refcount.h> 655fe58019SAttilio Rao 665fe58019SAttilio Rao struct fuse_iov { 675fe58019SAttilio Rao void *base; 685fe58019SAttilio Rao size_t len; 695fe58019SAttilio Rao size_t allocated_size; 705fe58019SAttilio Rao int credit; 715fe58019SAttilio Rao }; 725fe58019SAttilio Rao 735fe58019SAttilio Rao void fiov_init(struct fuse_iov *fiov, size_t size); 745fe58019SAttilio Rao void fiov_teardown(struct fuse_iov *fiov); 755fe58019SAttilio Rao void fiov_refresh(struct fuse_iov *fiov); 765fe58019SAttilio Rao void fiov_adjust(struct fuse_iov *fiov, size_t size); 775fe58019SAttilio Rao 7802295cafSConrad Meyer #define FUSE_DIMALLOC(fiov, spc1, spc2, amnt) do { \ 795fe58019SAttilio Rao fiov_adjust(fiov, (sizeof(*(spc1)) + (amnt))); \ 805fe58019SAttilio Rao (spc1) = (fiov)->base; \ 815fe58019SAttilio Rao (spc2) = (char *)(fiov)->base + (sizeof(*(spc1))); \ 825fe58019SAttilio Rao } while (0) 835fe58019SAttilio Rao 845fe58019SAttilio Rao #define FU_AT_LEAST(siz) max((siz), 160) 855fe58019SAttilio Rao 865fe58019SAttilio Rao #define FUSE_ASSERT_AW_DONE(ftick) \ 875fe58019SAttilio Rao KASSERT((ftick)->tk_aw_link.tqe_next == NULL && \ 885fe58019SAttilio Rao (ftick)->tk_aw_link.tqe_prev == NULL, \ 8902295cafSConrad Meyer ("FUSE: ticket still on answer delivery list %p", (ftick))) 905fe58019SAttilio Rao 915fe58019SAttilio Rao #define FUSE_ASSERT_MS_DONE(ftick) \ 925fe58019SAttilio Rao KASSERT((ftick)->tk_ms_link.stqe_next == NULL, \ 935fe58019SAttilio Rao ("FUSE: ticket still on message list %p", (ftick))) 945fe58019SAttilio Rao 955fe58019SAttilio Rao struct fuse_ticket; 965fe58019SAttilio Rao struct fuse_data; 975fe58019SAttilio Rao 985fe58019SAttilio Rao typedef int fuse_handler_t(struct fuse_ticket *ftick, struct uio *uio); 995fe58019SAttilio Rao 1005fe58019SAttilio Rao struct fuse_ticket { 1015fe58019SAttilio Rao /* fields giving the identity of the ticket */ 1025fe58019SAttilio Rao uint64_t tk_unique; 1035fe58019SAttilio Rao struct fuse_data *tk_data; 1045fe58019SAttilio Rao int tk_flag; 1055fe58019SAttilio Rao u_int tk_refcount; 106a1542146SAlan Somers /* 107a1542146SAlan Somers * If this ticket's operation has been interrupted, this will hold the 108a1542146SAlan Somers * unique value of the FUSE_INTERRUPT operation. Otherwise, it will be 109a1542146SAlan Somers * 0. 110a1542146SAlan Somers */ 111a1542146SAlan Somers uint64_t irq_unique; 1125fe58019SAttilio Rao 1135fe58019SAttilio Rao /* fields for initiating an upgoing message */ 1145fe58019SAttilio Rao struct fuse_iov tk_ms_fiov; 1155fe58019SAttilio Rao void *tk_ms_bufdata; 1165fe58019SAttilio Rao size_t tk_ms_bufsize; 1175fe58019SAttilio Rao enum { FT_M_FIOV, FT_M_BUF } tk_ms_type; 1185fe58019SAttilio Rao STAILQ_ENTRY(fuse_ticket) tk_ms_link; 1195fe58019SAttilio Rao 1205fe58019SAttilio Rao /* fields for handling answers coming from userspace */ 1215fe58019SAttilio Rao struct fuse_iov tk_aw_fiov; 1225fe58019SAttilio Rao void *tk_aw_bufdata; 1235fe58019SAttilio Rao size_t tk_aw_bufsize; 1245fe58019SAttilio Rao enum { FT_A_FIOV, FT_A_BUF } tk_aw_type; 1255fe58019SAttilio Rao 1265fe58019SAttilio Rao struct fuse_out_header tk_aw_ohead; 1275fe58019SAttilio Rao int tk_aw_errno; 1285fe58019SAttilio Rao struct mtx tk_aw_mtx; 1295fe58019SAttilio Rao fuse_handler_t *tk_aw_handler; 1305fe58019SAttilio Rao TAILQ_ENTRY(fuse_ticket) tk_aw_link; 1315fe58019SAttilio Rao }; 1325fe58019SAttilio Rao 1335fe58019SAttilio Rao #define FT_ANSW 0x01 /* request of ticket has already been answered */ 1345fe58019SAttilio Rao #define FT_DIRTY 0x04 /* ticket has been used */ 1355fe58019SAttilio Rao 13602295cafSConrad Meyer static inline struct fuse_iov * 1375fe58019SAttilio Rao fticket_resp(struct fuse_ticket *ftick) 1385fe58019SAttilio Rao { 1395fe58019SAttilio Rao return (&ftick->tk_aw_fiov); 1405fe58019SAttilio Rao } 1415fe58019SAttilio Rao 14202295cafSConrad Meyer static inline bool 1435fe58019SAttilio Rao fticket_answered(struct fuse_ticket *ftick) 1445fe58019SAttilio Rao { 1455fe58019SAttilio Rao mtx_assert(&ftick->tk_aw_mtx, MA_OWNED); 1465fe58019SAttilio Rao return (ftick->tk_flag & FT_ANSW); 1475fe58019SAttilio Rao } 1485fe58019SAttilio Rao 14902295cafSConrad Meyer static inline void 1505fe58019SAttilio Rao fticket_set_answered(struct fuse_ticket *ftick) 1515fe58019SAttilio Rao { 1525fe58019SAttilio Rao mtx_assert(&ftick->tk_aw_mtx, MA_OWNED); 1535fe58019SAttilio Rao ftick->tk_flag |= FT_ANSW; 1545fe58019SAttilio Rao } 1555fe58019SAttilio Rao 156723c7768SAlan Somers static inline struct fuse_in_header* 157723c7768SAlan Somers fticket_in_header(struct fuse_ticket *ftick) 158723c7768SAlan Somers { 159723c7768SAlan Somers return (struct fuse_in_header *)(ftick->tk_ms_fiov.base); 160723c7768SAlan Somers } 161723c7768SAlan Somers 16202295cafSConrad Meyer static inline enum fuse_opcode 1635fe58019SAttilio Rao fticket_opcode(struct fuse_ticket *ftick) 1645fe58019SAttilio Rao { 165723c7768SAlan Somers return fticket_in_header(ftick)->opcode; 1665fe58019SAttilio Rao } 1675fe58019SAttilio Rao 1685fe58019SAttilio Rao int fticket_pull(struct fuse_ticket *ftick, struct uio *uio); 1695fe58019SAttilio Rao 1705fe58019SAttilio Rao /* 1715fe58019SAttilio Rao * The data representing a FUSE session. 1725fe58019SAttilio Rao */ 1735fe58019SAttilio Rao struct fuse_data { 1745fe58019SAttilio Rao struct cdev *fdev; 1755fe58019SAttilio Rao struct mount *mp; 1765fe58019SAttilio Rao struct vnode *vroot; 1775fe58019SAttilio Rao struct ucred *daemoncred; 1785fe58019SAttilio Rao int dataflags; 1795fe58019SAttilio Rao int ref; 1805fe58019SAttilio Rao 1815fe58019SAttilio Rao struct mtx ms_mtx; 1825fe58019SAttilio Rao STAILQ_HEAD(, fuse_ticket) ms_head; 1830a7c63e0SAlan Somers int ms_count; 1845fe58019SAttilio Rao 1855fe58019SAttilio Rao struct mtx aw_mtx; 1865fe58019SAttilio Rao TAILQ_HEAD(, fuse_ticket) aw_head; 1875fe58019SAttilio Rao 188723c7768SAlan Somers /* 189723c7768SAlan Somers * Holds the next value of the FUSE operation unique value. 190723c7768SAlan Somers * Also, serves as a wakeup channel to prevent any operations from 191723c7768SAlan Somers * being created before INIT completes. 192723c7768SAlan Somers */ 1935fe58019SAttilio Rao u_long ticketer; 1945fe58019SAttilio Rao 1955fe58019SAttilio Rao struct sx rename_lock; 1965fe58019SAttilio Rao 1975fe58019SAttilio Rao uint32_t fuse_libabi_major; 1985fe58019SAttilio Rao uint32_t fuse_libabi_minor; 1995fe58019SAttilio Rao 2005fe58019SAttilio Rao uint32_t max_write; 2015fe58019SAttilio Rao uint32_t max_read; 2025fe58019SAttilio Rao uint32_t subtype; 2035fe58019SAttilio Rao char volname[MAXPATHLEN]; 2045fe58019SAttilio Rao 2055fe58019SAttilio Rao struct selinfo ks_rsel; 2065fe58019SAttilio Rao 2075fe58019SAttilio Rao int daemon_timeout; 2085fe58019SAttilio Rao uint64_t notimpl; 209a6fac00cSAlan Somers uint64_t mnt_flag; 2105fe58019SAttilio Rao }; 2115fe58019SAttilio Rao 2125fe58019SAttilio Rao #define FSESS_DEAD 0x0001 /* session is to be closed */ 2135fe58019SAttilio Rao #define FSESS_UNUSED0 0x0002 /* unused */ 2145fe58019SAttilio Rao #define FSESS_INITED 0x0004 /* session has been inited */ 2155fe58019SAttilio Rao #define FSESS_DAEMON_CAN_SPY 0x0010 /* let non-owners access this fs */ 2165fe58019SAttilio Rao /* (and being observed by the daemon) */ 2175fe58019SAttilio Rao #define FSESS_PUSH_SYMLINKS_IN 0x0020 /* prefix absolute symlinks with mp */ 2185fe58019SAttilio Rao #define FSESS_DEFAULT_PERMISSIONS 0x0040 /* kernel does permission checking */ 2195fe58019SAttilio Rao #define FSESS_NO_ATTRCACHE 0x0080 /* no attribute caching */ 2205fe58019SAttilio Rao #define FSESS_NO_READAHEAD 0x0100 /* no readaheads */ 2215fe58019SAttilio Rao #define FSESS_NO_DATACACHE 0x0200 /* disable buffer cache */ 2225fe58019SAttilio Rao #define FSESS_NO_NAMECACHE 0x0400 /* disable name cache */ 2235fe58019SAttilio Rao #define FSESS_NO_MMAP 0x0800 /* disable mmap */ 224f067b609SAlan Somers #define FSESS_POSIX_LOCKS 0x2000 /* daemon supports POSIX locks */ 225e5b50fe7SAlan Somers #define FSESS_EXPORT_SUPPORT 0x10000 /* daemon supports NFS-style lookups */ 226a6fac00cSAlan Somers #define FSESS_MNTOPTS_MASK ( \ 227a6fac00cSAlan Somers FSESS_DAEMON_CAN_SPY | FSESS_PUSH_SYMLINKS_IN | \ 228a6fac00cSAlan Somers FSESS_DEFAULT_PERMISSIONS | FSESS_NO_ATTRCACHE | \ 229a6fac00cSAlan Somers FSESS_NO_READAHEAD | FSESS_NO_DATACACHE | \ 230a6fac00cSAlan Somers FSESS_NO_NAMECACHE | FSESS_NO_MMAP) 2315fe58019SAttilio Rao 232c4af8b17SConrad Meyer enum fuse_data_cache_mode { 233c4af8b17SConrad Meyer FUSE_CACHE_UC, 234c4af8b17SConrad Meyer FUSE_CACHE_WT, 235c4af8b17SConrad Meyer FUSE_CACHE_WB, 236c4af8b17SConrad Meyer }; 237c4af8b17SConrad Meyer 238c4af8b17SConrad Meyer extern int fuse_data_cache_mode; 2395fe58019SAttilio Rao 24002295cafSConrad Meyer static inline struct fuse_data * 2415fe58019SAttilio Rao fuse_get_mpdata(struct mount *mp) 2425fe58019SAttilio Rao { 2435fe58019SAttilio Rao return mp->mnt_data; 2445fe58019SAttilio Rao } 2455fe58019SAttilio Rao 24602295cafSConrad Meyer static inline bool 2475fe58019SAttilio Rao fsess_isimpl(struct mount *mp, int opcode) 2485fe58019SAttilio Rao { 2495fe58019SAttilio Rao struct fuse_data *data = fuse_get_mpdata(mp); 2505fe58019SAttilio Rao 25102295cafSConrad Meyer return ((data->notimpl & (1ULL << opcode)) == 0); 2525fe58019SAttilio Rao 2535fe58019SAttilio Rao } 25402295cafSConrad Meyer static inline void 2555fe58019SAttilio Rao fsess_set_notimpl(struct mount *mp, int opcode) 2565fe58019SAttilio Rao { 2575fe58019SAttilio Rao struct fuse_data *data = fuse_get_mpdata(mp); 2585fe58019SAttilio Rao 2595fe58019SAttilio Rao data->notimpl |= (1ULL << opcode); 2605fe58019SAttilio Rao } 2615fe58019SAttilio Rao 26202295cafSConrad Meyer static inline bool 2635fe58019SAttilio Rao fsess_opt_datacache(struct mount *mp) 2645fe58019SAttilio Rao { 2655fe58019SAttilio Rao struct fuse_data *data = fuse_get_mpdata(mp); 2665fe58019SAttilio Rao 267c4af8b17SConrad Meyer return (fuse_data_cache_mode != FUSE_CACHE_UC && 2685fe58019SAttilio Rao (data->dataflags & FSESS_NO_DATACACHE) == 0); 2695fe58019SAttilio Rao } 2705fe58019SAttilio Rao 27102295cafSConrad Meyer static inline bool 2725fe58019SAttilio Rao fsess_opt_mmap(struct mount *mp) 2735fe58019SAttilio Rao { 2745fe58019SAttilio Rao struct fuse_data *data = fuse_get_mpdata(mp); 2755fe58019SAttilio Rao 276fcefa6efSAlan Somers if (fuse_data_cache_mode == FUSE_CACHE_UC) 27702295cafSConrad Meyer return (false); 2785fe58019SAttilio Rao return ((data->dataflags & (FSESS_NO_DATACACHE | FSESS_NO_MMAP)) == 0); 2795fe58019SAttilio Rao } 2805fe58019SAttilio Rao 281268c28edSAlan Somers /* Insert a new upgoing message */ 28202295cafSConrad Meyer static inline void 2835fe58019SAttilio Rao fuse_ms_push(struct fuse_ticket *ftick) 2845fe58019SAttilio Rao { 2855fe58019SAttilio Rao mtx_assert(&ftick->tk_data->ms_mtx, MA_OWNED); 2865fe58019SAttilio Rao refcount_acquire(&ftick->tk_refcount); 2875fe58019SAttilio Rao STAILQ_INSERT_TAIL(&ftick->tk_data->ms_head, ftick, tk_ms_link); 2880a7c63e0SAlan Somers ftick->tk_data->ms_count++; 2895fe58019SAttilio Rao } 2905fe58019SAttilio Rao 291268c28edSAlan Somers /* Insert a new upgoing message to the front of the queue */ 292268c28edSAlan Somers static inline void 293268c28edSAlan Somers fuse_ms_push_head(struct fuse_ticket *ftick) 294268c28edSAlan Somers { 295268c28edSAlan Somers mtx_assert(&ftick->tk_data->ms_mtx, MA_OWNED); 296268c28edSAlan Somers refcount_acquire(&ftick->tk_refcount); 297268c28edSAlan Somers STAILQ_INSERT_HEAD(&ftick->tk_data->ms_head, ftick, tk_ms_link); 2980a7c63e0SAlan Somers ftick->tk_data->ms_count++; 299268c28edSAlan Somers } 300268c28edSAlan Somers 30102295cafSConrad Meyer static inline struct fuse_ticket * 3025fe58019SAttilio Rao fuse_ms_pop(struct fuse_data *data) 3035fe58019SAttilio Rao { 3045fe58019SAttilio Rao struct fuse_ticket *ftick = NULL; 3055fe58019SAttilio Rao 3065fe58019SAttilio Rao mtx_assert(&data->ms_mtx, MA_OWNED); 3075fe58019SAttilio Rao 3085fe58019SAttilio Rao if ((ftick = STAILQ_FIRST(&data->ms_head))) { 3095fe58019SAttilio Rao STAILQ_REMOVE_HEAD(&data->ms_head, tk_ms_link); 3100a7c63e0SAlan Somers data->ms_count--; 3115fe58019SAttilio Rao #ifdef INVARIANTS 3120a7c63e0SAlan Somers MPASS(data->ms_count >= 0); 3135fe58019SAttilio Rao ftick->tk_ms_link.stqe_next = NULL; 3145fe58019SAttilio Rao #endif 3155fe58019SAttilio Rao } 3165fe58019SAttilio Rao 31702295cafSConrad Meyer return (ftick); 3185fe58019SAttilio Rao } 3195fe58019SAttilio Rao 32002295cafSConrad Meyer static inline void 3215fe58019SAttilio Rao fuse_aw_push(struct fuse_ticket *ftick) 3225fe58019SAttilio Rao { 3235fe58019SAttilio Rao mtx_assert(&ftick->tk_data->aw_mtx, MA_OWNED); 3245fe58019SAttilio Rao refcount_acquire(&ftick->tk_refcount); 3255fe58019SAttilio Rao TAILQ_INSERT_TAIL(&ftick->tk_data->aw_head, ftick, tk_aw_link); 3265fe58019SAttilio Rao } 3275fe58019SAttilio Rao 32802295cafSConrad Meyer static inline void 3295fe58019SAttilio Rao fuse_aw_remove(struct fuse_ticket *ftick) 3305fe58019SAttilio Rao { 3315fe58019SAttilio Rao mtx_assert(&ftick->tk_data->aw_mtx, MA_OWNED); 3325fe58019SAttilio Rao TAILQ_REMOVE(&ftick->tk_data->aw_head, ftick, tk_aw_link); 3335fe58019SAttilio Rao #ifdef INVARIANTS 3345fe58019SAttilio Rao ftick->tk_aw_link.tqe_next = NULL; 3355fe58019SAttilio Rao ftick->tk_aw_link.tqe_prev = NULL; 3365fe58019SAttilio Rao #endif 3375fe58019SAttilio Rao } 3385fe58019SAttilio Rao 33902295cafSConrad Meyer static inline struct fuse_ticket * 3405fe58019SAttilio Rao fuse_aw_pop(struct fuse_data *data) 3415fe58019SAttilio Rao { 34202295cafSConrad Meyer struct fuse_ticket *ftick; 3435fe58019SAttilio Rao 3445fe58019SAttilio Rao mtx_assert(&data->aw_mtx, MA_OWNED); 3455fe58019SAttilio Rao 34602295cafSConrad Meyer if ((ftick = TAILQ_FIRST(&data->aw_head)) != NULL) 3475fe58019SAttilio Rao fuse_aw_remove(ftick); 3485fe58019SAttilio Rao 34902295cafSConrad Meyer return (ftick); 3505fe58019SAttilio Rao } 3515fe58019SAttilio Rao 3525fe58019SAttilio Rao struct fuse_ticket *fuse_ticket_fetch(struct fuse_data *data); 3535fe58019SAttilio Rao int fuse_ticket_drop(struct fuse_ticket *ftick); 3545fe58019SAttilio Rao void fuse_insert_callback(struct fuse_ticket *ftick, fuse_handler_t *handler); 355268c28edSAlan Somers void fuse_insert_message(struct fuse_ticket *ftick, bool irq); 3565fe58019SAttilio Rao 35702295cafSConrad Meyer static inline bool 3585fe58019SAttilio Rao fuse_libabi_geq(struct fuse_data *data, uint32_t abi_maj, uint32_t abi_min) 3595fe58019SAttilio Rao { 3605fe58019SAttilio Rao return (data->fuse_libabi_major > abi_maj || 36102295cafSConrad Meyer (data->fuse_libabi_major == abi_maj && 36202295cafSConrad Meyer data->fuse_libabi_minor >= abi_min)); 3635fe58019SAttilio Rao } 3645fe58019SAttilio Rao 3655fe58019SAttilio Rao struct fuse_data *fdata_alloc(struct cdev *dev, struct ucred *cred); 3665fe58019SAttilio Rao void fdata_trydestroy(struct fuse_data *data); 3675fe58019SAttilio Rao void fdata_set_dead(struct fuse_data *data); 3685fe58019SAttilio Rao 36902295cafSConrad Meyer static inline bool 3705fe58019SAttilio Rao fdata_get_dead(struct fuse_data *data) 3715fe58019SAttilio Rao { 3725fe58019SAttilio Rao return (data->dataflags & FSESS_DEAD); 3735fe58019SAttilio Rao } 3745fe58019SAttilio Rao 3755fe58019SAttilio Rao struct fuse_dispatcher { 3765fe58019SAttilio Rao struct fuse_ticket *tick; 3775fe58019SAttilio Rao struct fuse_in_header *finh; 3785fe58019SAttilio Rao 3795fe58019SAttilio Rao void *indata; 3805fe58019SAttilio Rao size_t iosize; 3815fe58019SAttilio Rao uint64_t nodeid; 3825fe58019SAttilio Rao int answ_stat; 3835fe58019SAttilio Rao void *answ; 3845fe58019SAttilio Rao }; 3855fe58019SAttilio Rao 38602295cafSConrad Meyer static inline void 3875fe58019SAttilio Rao fdisp_init(struct fuse_dispatcher *fdisp, size_t iosize) 3885fe58019SAttilio Rao { 3895fe58019SAttilio Rao fdisp->iosize = iosize; 3905fe58019SAttilio Rao fdisp->tick = NULL; 3915fe58019SAttilio Rao } 3925fe58019SAttilio Rao 39302295cafSConrad Meyer static inline void 3945fe58019SAttilio Rao fdisp_destroy(struct fuse_dispatcher *fdisp) 3955fe58019SAttilio Rao { 3965fe58019SAttilio Rao fuse_ticket_drop(fdisp->tick); 3975fe58019SAttilio Rao #ifdef INVARIANTS 3985fe58019SAttilio Rao fdisp->tick = NULL; 3995fe58019SAttilio Rao #endif 4005fe58019SAttilio Rao } 4015fe58019SAttilio Rao 40212292a99SAlan Somers void fdisp_refresh(struct fuse_dispatcher *fdip); 40312292a99SAlan Somers 4045fe58019SAttilio Rao void fdisp_make(struct fuse_dispatcher *fdip, enum fuse_opcode op, 40502295cafSConrad Meyer struct mount *mp, uint64_t nid, struct thread *td, struct ucred *cred); 4065fe58019SAttilio Rao 4075fe58019SAttilio Rao void fdisp_make_vp(struct fuse_dispatcher *fdip, enum fuse_opcode op, 4085fe58019SAttilio Rao struct vnode *vp, struct thread *td, struct ucred *cred); 4095fe58019SAttilio Rao 41012292a99SAlan Somers void fdisp_refresh_vp(struct fuse_dispatcher *fdip, enum fuse_opcode op, 41112292a99SAlan Somers struct vnode *vp, struct thread *td, struct ucred *cred); 41212292a99SAlan Somers 4135fe58019SAttilio Rao int fdisp_wait_answ(struct fuse_dispatcher *fdip); 4145fe58019SAttilio Rao 41502295cafSConrad Meyer static inline int 4165fe58019SAttilio Rao fdisp_simple_putget_vp(struct fuse_dispatcher *fdip, enum fuse_opcode op, 4175fe58019SAttilio Rao struct vnode *vp, struct thread *td, struct ucred *cred) 4185fe58019SAttilio Rao { 4195fe58019SAttilio Rao fdisp_make_vp(fdip, op, vp, td, cred); 42002295cafSConrad Meyer return (fdisp_wait_answ(fdip)); 4215fe58019SAttilio Rao } 4225fe58019SAttilio Rao 4235fe58019SAttilio Rao #endif /* _FUSE_IPC_H_ */ 424