puffs.h revision 1.21
1 /* $NetBSD: puffs.h,v 1.21 2007/01/09 18:19:01 pooka Exp $ */ 2 3 /* 4 * Copyright (c) 2005, 2006 Antti Kantee. All Rights Reserved. 5 * 6 * Development of this software was supported by the 7 * Google Summer of Code program and the Ulla Tuominen Foundation. 8 * The Google SoC project was mentored by Bill Studenmund. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. The name of the company nor the name of the author may be used to 19 * endorse or promote products derived from this software without specific 20 * prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 23 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 24 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 25 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #ifndef _PUFFS_H_ 36 #define _PUFFS_H_ 37 38 #include <sys/param.h> 39 #include <sys/mount.h> 40 #include <sys/statvfs.h> 41 #include <sys/vnode.h> 42 43 #include <fs/puffs/puffs_msgif.h> 44 45 #include <mntopts.h> 46 #include <string.h> 47 48 /* forwards */ 49 struct puffs_cc; 50 51 struct puffs_getreq; 52 struct puffs_putreq; 53 54 /* XXX: might disappear from here */ 55 struct puffs_node { 56 off_t pn_size; 57 int pn_flag; 58 struct vattr pn_va; 59 60 void *pn_data; /* private data */ 61 62 char *pn_path; /* PUFFS_FLAG_BUILDPATH */ 63 size_t pn_plen; 64 65 struct puffs_usermount *pn_mnt; 66 67 LIST_ENTRY(puffs_node) pn_entries; 68 }; 69 70 71 struct puffs_usermount; 72 73 /* 74 * megaXXX: these are values from inside _KERNEL 75 * need to work on the translation for ALL the necessary values. 76 */ 77 #define PUFFS_VNOVAL (-1) 78 #define PUFFS_ISDOTDOT 0x2000 79 #define PUFFS_IO_APPEND 0x20 80 81 /* 82 * Magic constants 83 */ 84 #define PUFFS_CC_STACKSIZE_DEFAULT (16*1024) 85 86 struct puffs_cn { 87 struct puffs_kcn *pcn_pkcnp; /* kernel input */ 88 89 /* XXX: this will be a more complex object some day */ 90 char *pcn_fullpath; /* if PUFFS_FLAG_BUILDPATH */ 91 size_t pcn_fullplen; 92 }; 93 #define pcn_nameiop pcn_pkcnp->pkcn_nameiop 94 #define pcn_flags pcn_pkcnp->pkcn_flags 95 #define pcn_pid pcn_pkcnp->pkcn_pid 96 #define pcn_cred pcn_pkcnp->pkcn_cred 97 #define pcn_name pcn_pkcnp->pkcn_name 98 #define pcn_namelen pcn_pkcnp->pkcn_namelen 99 100 101 /* 102 * Puffs options to mount 103 */ 104 /* kernel */ 105 #define PUFFSMOPT_CACHE { "cache", 1, PUFFS_KFLAG_NOCACHE, 1 } 106 #define PUFFSMOPT_ALLOPS { "allops", 0, PUFFS_KFLAG_ALLOPS, 1 } 107 108 /* libpuffs */ 109 #define PUFFSMOPT_DUMP { "dump", 0, PUFFS_FLAG_OPDUMP, 1 } 110 111 #define PUFFSMOPT_STD \ 112 PUFFSMOPT_CACHE, \ 113 PUFFSMOPT_ALLOPS, \ 114 PUFFSMOPT_DUMP 115 116 extern const struct mntopt puffsmopts[]; /* puffs.c */ 117 118 /* callbacks for operations */ 119 struct puffs_ops { 120 int (*puffs_fs_unmount)(struct puffs_cc *, int, pid_t); 121 int (*puffs_fs_statvfs)(struct puffs_cc *, 122 struct statvfs *, pid_t); 123 int (*puffs_fs_sync)(struct puffs_cc *, int, 124 const struct puffs_cred *, pid_t); 125 126 int (*puffs_node_lookup)(struct puffs_cc *, 127 void *, void **, enum vtype *, voff_t *, dev_t *, 128 const struct puffs_cn *); 129 int (*puffs_node_create)(struct puffs_cc *, 130 void *, void **, const struct puffs_cn *, const struct vattr *); 131 int (*puffs_node_mknod)(struct puffs_cc *, 132 void *, void **, const struct puffs_cn *, const struct vattr *); 133 int (*puffs_node_open)(struct puffs_cc *, 134 void *, int, const struct puffs_cred *, pid_t); 135 int (*puffs_node_close)(struct puffs_cc *, 136 void *, int, const struct puffs_cred *, pid_t); 137 int (*puffs_node_access)(struct puffs_cc *, 138 void *, int, const struct puffs_cred *, pid_t); 139 int (*puffs_node_getattr)(struct puffs_cc *, 140 void *, struct vattr *, const struct puffs_cred *, pid_t); 141 int (*puffs_node_setattr)(struct puffs_cc *, 142 void *, const struct vattr *, const struct puffs_cred *, pid_t); 143 int (*puffs_node_poll)(struct puffs_cc *, 144 void *, struct puffs_vnreq_poll *); 145 int (*puffs_node_revoke)(struct puffs_cc *, void *, int); 146 int (*puffs_node_mmap)(struct puffs_cc *, 147 void *, int, const struct puffs_cred *, pid_t); 148 int (*puffs_node_fsync)(struct puffs_cc *, 149 void *, const struct puffs_cred *, int, off_t, off_t, pid_t); 150 int (*puffs_node_seek)(struct puffs_cc *, 151 void *, off_t, off_t, const struct puffs_cred *); 152 int (*puffs_node_remove)(struct puffs_cc *, 153 void *, void *, const struct puffs_cn *); 154 int (*puffs_node_link)(struct puffs_cc *, 155 void *, void *, const struct puffs_cn *); 156 int (*puffs_node_rename)(struct puffs_cc *, 157 void *, void *, const struct puffs_cn *, void *, void *, 158 const struct puffs_cn *); 159 int (*puffs_node_mkdir)(struct puffs_cc *, 160 void *, void **, const struct puffs_cn *, const struct vattr *); 161 int (*puffs_node_rmdir)(struct puffs_cc *, 162 void *, void *, const struct puffs_cn *); 163 int (*puffs_node_symlink)(struct puffs_cc *, 164 void *, void **, const struct puffs_cn *, const struct vattr *, 165 const char *); 166 int (*puffs_node_readdir)(struct puffs_cc *, 167 void *, struct dirent *, const struct puffs_cred *, 168 off_t *, size_t *); 169 int (*puffs_node_readlink)(struct puffs_cc *, 170 void *, const struct puffs_cred *, char *, size_t *); 171 int (*puffs_node_reclaim)(struct puffs_cc *, 172 void *, pid_t); 173 int (*puffs_node_inactive)(struct puffs_cc *, 174 void *, pid_t, int *); 175 int (*puffs_node_print)(struct puffs_cc *, 176 void *); 177 int (*puffs_node_pathconf)(struct puffs_cc *, 178 void *, int, int *); 179 int (*puffs_node_advlock)(struct puffs_cc *, 180 void *, void *, int, struct flock *, int); 181 int (*puffs_node_getextattr)(struct puffs_cc *, 182 void *, struct puffs_vnreq_getextattr *); 183 int (*puffs_node_setextattr)(struct puffs_cc *, 184 void *, struct puffs_vnreq_setextattr *); 185 int (*puffs_node_listextattr)(struct puffs_cc *, 186 void *, struct puffs_vnreq_listextattr *); 187 int (*puffs_node_read)(struct puffs_cc *, void *, 188 uint8_t *, off_t, size_t *, const struct puffs_cred *, int); 189 int (*puffs_node_write)(struct puffs_cc *, void *, 190 uint8_t *, off_t, size_t *, const struct puffs_cred *, int); 191 }; 192 193 struct puffs_usermount { 194 struct puffs_ops pu_ops; 195 196 int pu_fd; 197 uint32_t pu_flags; 198 size_t pu_maxreqlen; 199 size_t pu_cc_stacksize; 200 201 int pu_state; 202 203 struct puffs_node *pu_pn_root; 204 205 LIST_HEAD(, puffs_node) pu_pnodelst; 206 207 int pu_wcnt; 208 void *pu_privdata; 209 }; 210 211 enum { 212 PUFFS_STATE_MOUNTING, PUFFS_STATE_RUNNING, 213 PUFFS_STATE_UNMOUNTING, PUFFS_STATE_UNMOUNTED 214 }; 215 216 #define PUFFS_FLAG_KERN(a) ((a) & 0x0000ffff) 217 #define PUFFS_FLAG_LIB(a) ((a) & 0xffff0000) 218 219 #define PUFFS_FLAG_BUILDPATH 0x80000000 /* node paths in pnode */ 220 #define PUFFS_FLAG_OPDUMP 0x40000000 /* dump all operations */ 221 222 /* blocking mode argument */ 223 #define PUFFSDEV_BLOCK 0 224 #define PUFFSDEV_NONBLOCK 1 225 226 /* mainloop flags */ 227 #define PUFFSLOOP_NODAEMON 0x01 228 229 int puffs_fsnop_unmount(struct puffs_cc *, int, pid_t); 230 int puffs_fsnop_statvfs(struct puffs_cc *, struct statvfs *, pid_t); 231 void puffs_zerostatvfs(struct statvfs *); 232 int puffs_fsnop_sync(struct puffs_cc *, int waitfor, 233 const struct puffs_cred *, pid_t); 234 235 #define DENT_DOT 0 236 #define DENT_DOTDOT 1 237 #define DENT_ADJ(a) ((a)-2) /* nth request means dir's n-2th */ 238 int puffs_gendotdent(struct dirent **, ino_t, int, size_t *); 239 int puffs_nextdent(struct dirent **, const char *, ino_t, 240 uint8_t, size_t *); 241 int puffs_vtype2dt(enum vtype); 242 enum vtype puffs_mode2vt(mode_t); 243 244 245 /* 246 * Operation credentials 247 */ 248 249 /* Credential fetch */ 250 int puffs_cred_getuid(const struct puffs_cred *pcr, uid_t *); 251 int puffs_cred_getgid(const struct puffs_cred *pcr, gid_t *); 252 int puffs_cred_getgroups(const struct puffs_cred *pcr, gid_t *, short *); 253 254 /* Credential check */ 255 int puffs_cred_isuid(const struct puffs_cred *pcr, uid_t); 256 int puffs_cred_hasgroup(const struct puffs_cred *pcr, gid_t); 257 /* kernel internal NOCRED */ 258 int puffs_cred_iskernel(const struct puffs_cred *pcr); 259 /* kernel internal FSCRED */ 260 int puffs_cred_isfs(const struct puffs_cred *pcr); 261 /* root || NOCRED || FSCRED */ 262 int puffs_cred_isjuggernaut(const struct puffs_cred *pcr); 263 264 265 /* 266 * protos 267 */ 268 269 #define PUFFSOP_PROTOS(fsname) \ 270 int fsname##_fs_mount(struct puffs_usermount *, void **, \ 271 struct statvfs *); \ 272 int fsname##_fs_unmount(struct puffs_cc *, int, pid_t); \ 273 int fsname##_fs_statvfs(struct puffs_cc *, \ 274 struct statvfs *, pid_t); \ 275 int fsname##_fs_sync(struct puffs_cc *, int, \ 276 const struct puffs_cred *cred, pid_t); \ 277 \ 278 int fsname##_node_lookup(struct puffs_cc *, \ 279 void *, void **, enum vtype *, voff_t *, dev_t *, \ 280 const struct puffs_cn *); \ 281 int fsname##_node_create(struct puffs_cc *, \ 282 void *, void **, const struct puffs_cn *, \ 283 const struct vattr *); \ 284 int fsname##_node_mknod(struct puffs_cc *, \ 285 void *, void **, const struct puffs_cn *, \ 286 const struct vattr *); \ 287 int fsname##_node_open(struct puffs_cc *, \ 288 void *, int, const struct puffs_cred *, pid_t); \ 289 int fsname##_node_close(struct puffs_cc *, \ 290 void *, int, const struct puffs_cred *, pid_t); \ 291 int fsname##_node_access(struct puffs_cc *, \ 292 void *, int, const struct puffs_cred *, pid_t); \ 293 int fsname##_node_getattr(struct puffs_cc *, \ 294 void *, struct vattr *, const struct puffs_cred *, pid_t); \ 295 int fsname##_node_setattr(struct puffs_cc *, \ 296 void *, const struct vattr *, const struct puffs_cred *, \ 297 pid_t); \ 298 int fsname##_node_poll(struct puffs_cc *, \ 299 void *, struct puffs_vnreq_poll *); \ 300 int fsname##_node_revoke(struct puffs_cc *, void *, int); \ 301 int fsname##_node_mmap(struct puffs_cc *, \ 302 void *, int, const struct puffs_cred *, pid_t); \ 303 int fsname##_node_fsync(struct puffs_cc *, \ 304 void *, const struct puffs_cred *, int, off_t, off_t, \ 305 pid_t); \ 306 int fsname##_node_seek(struct puffs_cc *, \ 307 void *, off_t, off_t, const struct puffs_cred *); \ 308 int fsname##_node_remove(struct puffs_cc *, \ 309 void *, void *, const struct puffs_cn *); \ 310 int fsname##_node_link(struct puffs_cc *, \ 311 void *, void *, const struct puffs_cn *); \ 312 int fsname##_node_rename(struct puffs_cc *, \ 313 void *, void *, const struct puffs_cn *, void *, void *, \ 314 const struct puffs_cn *); \ 315 int fsname##_node_mkdir(struct puffs_cc *, \ 316 void *, void **, const struct puffs_cn *, \ 317 const struct vattr *); \ 318 int fsname##_node_rmdir(struct puffs_cc *, \ 319 void *, void *, const struct puffs_cn *); \ 320 int fsname##_node_symlink(struct puffs_cc *, \ 321 void *, void **, const struct puffs_cn *, \ 322 const struct vattr *, const char *); \ 323 int fsname##_node_readdir(struct puffs_cc *, \ 324 void *, struct dirent *, const struct puffs_cred *, \ 325 off_t *, size_t *); \ 326 int fsname##_node_readlink(struct puffs_cc *, \ 327 void *, const struct puffs_cred *, char *, size_t *); \ 328 int fsname##_node_reclaim(struct puffs_cc *, \ 329 void *, pid_t); \ 330 int fsname##_node_inactive(struct puffs_cc *, \ 331 void *, pid_t, int *); \ 332 int fsname##_node_print(struct puffs_cc *, \ 333 void *); \ 334 int fsname##_node_pathconf(struct puffs_cc *, \ 335 void *, int, int *); \ 336 int fsname##_node_advlock(struct puffs_cc *, \ 337 void *, void *, int, struct flock *, int); \ 338 int fsname##_node_getextattr(struct puffs_cc *, \ 339 void *, struct puffs_vnreq_getextattr *); \ 340 int fsname##_node_setextattr(struct puffs_cc *, \ 341 void *, struct puffs_vnreq_setextattr *); \ 342 int fsname##_node_listextattr(struct puffs_cc *, \ 343 void *, struct puffs_vnreq_listextattr *); \ 344 int fsname##_node_read(struct puffs_cc *, void *, \ 345 uint8_t *, off_t, size_t *, const struct puffs_cred *, int);\ 346 int fsname##_node_write(struct puffs_cc *, void *, \ 347 uint8_t *, off_t, size_t *, const struct puffs_cred *, int); 348 349 #define PUFFSOP_INIT(ops) \ 350 ops = malloc(sizeof(struct puffs_ops)); \ 351 memset(ops, 0, sizeof(struct puffs_ops)) 352 #define PUFFSOP_SET(ops, fsname, fsornode, opname) \ 353 (ops)->puffs_##fsornode##_##opname = fsname##_##fsornode##_##opname 354 #define PUFFSOP_SETFSNOP(ops, opname) \ 355 (ops)->puffs_fs_##opname = puffs_fsnop_##opname 356 357 #define PUFFS_DEVEL_LIBVERSION 2 358 #define puffs_mount(a,b,c,d,e,f,g) \ 359 _puffs_mount(PUFFS_DEVEL_LIBVERSION,a,b,c,d,e,f,g) 360 361 __BEGIN_DECLS 362 363 struct puffs_usermount *_puffs_mount(int, struct puffs_ops *, const char *, int, 364 const char *, void *, uint32_t, size_t); 365 int puffs_start(struct puffs_usermount *, void *, struct statvfs *); 366 int puffs_exit(struct puffs_usermount *, int); 367 int puffs_mainloop(struct puffs_usermount *, int); 368 369 370 int puffs_getselectable(struct puffs_usermount *); 371 int puffs_setblockingmode(struct puffs_usermount *, int); 372 int puffs_getstate(struct puffs_usermount *); 373 int puffs_setrootpath(struct puffs_usermount *, const char *); 374 void puffs_setstacksize(struct puffs_usermount *, size_t); 375 376 struct puffs_node * puffs_pn_new(struct puffs_usermount *, void *); 377 void puffs_pn_put(struct puffs_node *); 378 struct vattr *puffs_pn_getvattrp(struct puffs_node *); 379 void puffs_setvattr(struct vattr *, const struct vattr *); 380 void puffs_vattr_null(struct vattr *); 381 382 /* 383 * Requests 384 */ 385 386 struct puffs_getreq *puffs_makegetreq(struct puffs_usermount *, 387 size_t, int); 388 int puffs_loadgetreq(struct puffs_getreq *); 389 struct puffs_req *puffs_getreq(struct puffs_getreq *); 390 int puffs_remaininggetreq(struct puffs_getreq *); 391 void puffs_setmaxgetreq(struct puffs_getreq *, int); 392 void puffs_destroygetreq(struct puffs_getreq *); 393 394 struct puffs_putreq *puffs_makeputreq(struct puffs_usermount *); 395 void puffs_putreq(struct puffs_putreq *, struct puffs_req *); 396 void puffs_putreq_cc(struct puffs_putreq *,struct puffs_cc*); 397 int puffs_putputreq(struct puffs_putreq *); 398 void puffs_resetputreq(struct puffs_putreq *); 399 void puffs_destroyputreq(struct puffs_putreq *); 400 401 /* 402 * Call Context interfaces relevant for user. 403 */ 404 405 void puffs_cc_yield(struct puffs_cc *); 406 void puffs_cc_continue(struct puffs_cc *); 407 struct puffs_usermount *puffs_cc_getusermount(struct puffs_cc *); 408 struct puffs_cc *puffs_cc_create(struct puffs_usermount *); 409 void puffs_cc_destroy(struct puffs_cc *); 410 411 /* 412 * Execute or continue a request 413 */ 414 415 int puffs_handlereqs(struct puffs_usermount *, struct puffs_getreq *, 416 struct puffs_putreq *, int); 417 418 int puffs_dopreq(struct puffs_usermount *, struct puffs_putreq *, 419 struct puffs_req *); 420 int puffs_docc(struct puffs_putreq *, struct puffs_cc *); 421 422 /* 423 * Flushing / invalidation routines 424 */ 425 426 int puffs_inval_namecache_dir(struct puffs_usermount *, void *); 427 int puffs_inval_namecache_all(struct puffs_usermount *); 428 429 __END_DECLS 430 431 #endif /* _PUFFS_H_ */ 432
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