perfuse_if.h revision 1.10
1/* $NetBSD: perfuse_if.h,v 1.10 2010/10/11 05:37:58 manu Exp $ */ 2 3/*- 4 * Copyright (c) 2010 Emmanuel Dreyfus. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 16 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 17 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 19 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 * POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28#ifndef _REFUSE_PERFUSE_H 29#define _REFUSE_PERFUSE_H 30 31#ifndef _PATH_PERFUSED 32#define _PATH_PERFUSED "/usr/sbin/perfused" 33#endif /* _PATH_PERFUSED */ 34#define _PATH_FUSE "/dev/fuse" 35#define FUSE_COMMFD_ENV "_FUSE_COMMFD" 36#define PERFUSE_MOUNT_MAGIC "noFuseRq" 37#define PERFUSE_UNKNOWN_INO 0xffffffff 38 39/* 40 * Diagnostic flags. This global is used only for DPRINTF/DERR/DWARN 41 */ 42extern int perfuse_diagflags; 43#define PDF_FOREGROUND 0x001 /* we run in foreground */ 44#define PDF_FUSE 0x002 /* Display FUSE reqeusts and reply */ 45#define PDF_DUMP 0x004 /* Dump FUSE frames */ 46#define PDF_PUFFS 0x008 /* Display PUFFS requets and reply */ 47#define PDF_FH 0x010 /* File handles */ 48#define PDF_RECLAIM 0x020 /* Reclaimed files */ 49#define PDF_READDIR 0x040 /* readdir operations */ 50#define PDF_REQUEUE 0x080 /* reueued messages */ 51#define PDF_SYNC 0x100 /* fsync and dirty flags */ 52#define PDF_MISC 0x200 /* Miscelaneous messages */ 53#define PDF_SYSLOG 0x400 /* use syslog */ 54#define PDF_FILENAME 0x800 /* File names */ 55 56/* 57 * Diagnostic functions 58 */ 59#define DPRINTF(fmt, ...) do { \ 60 if (perfuse_diagflags & PDF_SYSLOG) \ 61 syslog(LOG_INFO, fmt, ## __VA_ARGS__); \ 62 \ 63 if (perfuse_diagflags & PDF_FOREGROUND) \ 64 (void)printf(fmt, ## __VA_ARGS__); \ 65} while (0 /* CONSTCOND */) 66 67#define DERRX(status, fmt, ...) do { \ 68 if (perfuse_diagflags & PDF_SYSLOG) \ 69 syslog(LOG_ERR, fmt, ## __VA_ARGS__); \ 70 \ 71 if (perfuse_diagflags & PDF_FOREGROUND) { \ 72 (void)fprintf(stderr, fmt, ## __VA_ARGS__); \ 73 abort(); \ 74 } else { \ 75 errx(status, fmt, ## __VA_ARGS__); \ 76 } \ 77} while (0 /* CONSTCOND */) 78 79#define DERR(status, fmt, ...) do { \ 80 char fmterr[BUFSIZ]; \ 81 char strerrbuf[BUFSIZ]; \ 82 \ 83 (void)strerror_r(errno, strerrbuf, sizeof(strerrbuf)); \ 84 (void)sprintf(fmterr, "%s: %s\n", fmt, strerrbuf); \ 85 \ 86 if (perfuse_diagflags & PDF_SYSLOG) \ 87 syslog(LOG_ERR, fmterr, ## __VA_ARGS__); \ 88 \ 89 if (perfuse_diagflags & PDF_FOREGROUND) { \ 90 (void)fprintf(stderr, fmterr, ## __VA_ARGS__); \ 91 abort(); \ 92 } else { \ 93 errx(status, fmt, ## __VA_ARGS__); \ 94 } \ 95} while (0 /* CONSTCOND */) 96 97#define DWARNX(fmt, ...) do { \ 98 if (perfuse_diagflags & PDF_SYSLOG) \ 99 syslog(LOG_WARNING, fmt, ## __VA_ARGS__); \ 100 \ 101 warnx(fmt, ## __VA_ARGS__); \ 102} while (0 /* CONSTCOND */) 103 104#define DWARN(fmt, ...) do { \ 105 char fmterr[BUFSIZ]; \ 106 char strerrbuf[BUFSIZ]; \ 107 \ 108 (void)strerror_r(errno, strerrbuf, sizeof(strerrbuf)); \ 109 (void)sprintf(fmterr, "%s: %s\n", fmt, strerrbuf); \ 110 \ 111 if (perfuse_diagflags & PDF_SYSLOG) \ 112 syslog(LOG_WARNING, fmterr, ## __VA_ARGS__); \ 113 \ 114 warn(fmterr, ## __VA_ARGS__); \ 115} while (0 /* CONSTCOND */) 116 117/* 118 * frame handling callbacks 119 */ 120#ifndef PEFUSE_MSG_T 121#define PEFUSE_MSG_T struct perfuse_framebuf 122#endif 123typedef PEFUSE_MSG_T perfuse_msg_t; 124 125#define PERFUSE_UNSPEC_REPLY_LEN (size_t)-1 126 127enum perfuse_xchg_pb_reply { wait_reply, no_reply }; 128typedef perfuse_msg_t *(*perfuse_new_msg_fn)(struct puffs_usermount *, 129 puffs_cookie_t, int, size_t, const struct puffs_cred *); 130typedef int (*perfuse_xchg_msg_fn)(struct puffs_usermount *, 131 perfuse_msg_t *, size_t, enum perfuse_xchg_pb_reply); 132typedef void (*perfuse_destroy_msg_fn)(perfuse_msg_t *); 133typedef struct fuse_out_header *(*perfuse_get_outhdr_fn)(perfuse_msg_t *); 134typedef struct fuse_in_header *(*perfuse_get_inhdr_fn)(perfuse_msg_t *); 135typedef char *(*perfuse_get_inpayload_fn)(perfuse_msg_t *); 136typedef char *(*perfuse_get_outpayload_fn)(perfuse_msg_t *); 137 138struct perfuse_callbacks { 139 perfuse_new_msg_fn pc_new_msg; 140 perfuse_xchg_msg_fn pc_xchg_msg; 141 perfuse_destroy_msg_fn pc_destroy_msg; 142 perfuse_get_inhdr_fn pc_get_inhdr; 143 perfuse_get_inpayload_fn pc_get_inpayload; 144 perfuse_get_outhdr_fn pc_get_outhdr; 145 perfuse_get_outpayload_fn pc_get_outpayload; 146}; 147 148/* 149 * mount request 150 */ 151struct perfuse_mount_out { 152 uint32_t pmo_len; 153 int32_t pmo_error; 154 uint64_t pmo_unique; 155 char pmo_magic[sizeof(PERFUSE_MOUNT_MAGIC)]; 156 uint32_t pmo_source_len; 157 uint32_t pmo_target_len; 158 uint32_t pmo_filesystemtype_len; 159 uint32_t pmo_mountflags; 160 uint32_t pmo_data_len; 161 uint32_t pmo_sock_len; 162}; 163 164struct perfuse_mount_info { 165 const char *pmi_source; 166 const char *pmi_target; 167 const char *pmi_filesystemtype; 168 int pmi_mountflags; 169 void *pmi_data; 170 uid_t pmi_uid; 171}; 172 173/* 174 * Duplicated fro fuse.h to avoid making it public 175 */ 176#ifndef FUSE_BUFSIZE 177#define FUSE_MIN_BUFSIZE 0x21000 178#define FUSE_PREF_BUFSIZE (PAGE_SIZE + 0x1000) 179#define FUSE_BUFSIZE MAX(FUSE_PREF_BUFSIZE /* CONSTCOND */, FUSE_MIN_BUFSIZE) 180#endif /* FUSE_BUFSIZE */ 181 182struct fuse_in_header { 183 uint32_t len; 184 uint32_t opcode; 185 uint64_t unique; 186 uint64_t nodeid; 187 uint32_t uid; 188 uint32_t gid; 189 uint32_t pid; 190 uint32_t padding; 191}; 192 193struct fuse_out_header { 194 uint32_t len; 195 int32_t error; 196 uint64_t unique; 197}; 198 199__BEGIN_DECLS 200 201struct puffs_usermount *perfuse_init(struct perfuse_callbacks *, 202 struct perfuse_mount_info *); 203void perfuse_setspecific(struct puffs_usermount *, void *); 204void *perfuse_getspecific(struct puffs_usermount *); 205uint64_t perfuse_next_unique(struct puffs_usermount *); 206uint64_t perfuse_get_ino(struct puffs_usermount *, puffs_cookie_t); 207int perfuse_inloop(struct puffs_usermount *); 208const char *perfuse_opname(int); 209void perfuse_fs_init(struct puffs_usermount *); 210int perfuse_mainloop(struct puffs_usermount *); 211int perfuse_unmount(struct puffs_usermount *); 212 213#endif /* _REFUSE_PERFUSE_H */ 214