ops.c revision 1.55
1 /* $NetBSD: ops.c,v 1.55 2012/05/28 02:13:32 manu Exp $ */ 2 3 /*- 4 * Copyright (c) 2010-2011 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 #include <stdio.h> 29 #include <unistd.h> 30 #include <stdlib.h> 31 #include <libgen.h> 32 #include <errno.h> 33 #include <err.h> 34 #include <sysexits.h> 35 #include <syslog.h> 36 #include <puffs.h> 37 #include <sys/cdefs.h> 38 #include <sys/socket.h> 39 #include <sys/extattr.h> 40 #include <sys/time.h> 41 #include <machine/vmparam.h> 42 43 #include "perfuse_priv.h" 44 #include "fuse.h" 45 46 extern int perfuse_diagflags; 47 48 #if 0 49 static void print_node(const char *, puffs_cookie_t); 50 #endif 51 #ifdef PUFFS_KFLAG_CACHE_FS_TTL 52 static void perfuse_newinfo_setttl(struct puffs_newinfo *, 53 struct fuse_entry_out *, struct fuse_attr_out *); 54 #else /* PUFFS_KFLAG_CACHE_FS_TTL */ 55 static void set_expire(puffs_cookie_t, struct fuse_entry_out *, 56 struct fuse_attr_out *); 57 static int attr_expired(puffs_cookie_t); 58 static int entry_expired(puffs_cookie_t); 59 #endif /* PUFFS_KFLAG_CACHE_FS_TTL */ 60 static int xchg_msg(struct puffs_usermount *, puffs_cookie_t, 61 perfuse_msg_t *, size_t, enum perfuse_xchg_pb_reply); 62 static int mode_access(puffs_cookie_t, const struct puffs_cred *, mode_t); 63 static int sticky_access(struct puffs_node *, const struct puffs_cred *); 64 static void fuse_attr_to_vap(struct perfuse_state *, 65 struct vattr *, struct fuse_attr *); 66 static int node_lookup_dir_nodot(struct puffs_usermount *, 67 puffs_cookie_t, char *, size_t, struct puffs_node **); 68 static int node_lookup_common(struct puffs_usermount *, puffs_cookie_t, 69 struct puffs_newinfo *, const char *, const struct puffs_cred *, 70 struct puffs_node **); 71 static int node_mk_common(struct puffs_usermount *, puffs_cookie_t, 72 struct puffs_newinfo *, const struct puffs_cn *pcn, perfuse_msg_t *); 73 static uint64_t readdir_last_cookie(struct fuse_dirent *, size_t); 74 static ssize_t fuse_to_dirent(struct puffs_usermount *, puffs_cookie_t, 75 struct fuse_dirent *, size_t); 76 static int readdir_buffered(puffs_cookie_t, struct dirent *, off_t *, 77 size_t *); 78 static void requeue_request(struct puffs_usermount *, 79 puffs_cookie_t opc, enum perfuse_qtype); 80 static int dequeue_requests(struct perfuse_state *, 81 puffs_cookie_t opc, enum perfuse_qtype, int); 82 #define DEQUEUE_ALL 0 83 84 /* 85 * From <sys/vnode>, inside #ifdef _KERNEL section 86 */ 87 #define IO_SYNC (0x40|IO_DSYNC) 88 #define IO_DSYNC 0x00200 89 #define IO_DIRECT 0x02000 90 91 /* 92 * From <fcntl>, inside #ifdef _KERNEL section 93 */ 94 #define F_WAIT 0x010 95 #define F_FLOCK 0x020 96 #define OFLAGS(fflags) ((fflags) - 1) 97 98 /* 99 * Borrowed from src/sys/kern/vfs_subr.c and src/sys/sys/vnode.h 100 */ 101 const enum vtype iftovt_tab[16] = { 102 VNON, VFIFO, VCHR, VNON, VDIR, VNON, VBLK, VNON, 103 VREG, VNON, VLNK, VNON, VSOCK, VNON, VNON, VBAD, 104 }; 105 const int vttoif_tab[9] = { 106 0, S_IFREG, S_IFDIR, S_IFBLK, S_IFCHR, S_IFLNK, 107 S_IFSOCK, S_IFIFO, S_IFMT, 108 }; 109 110 #define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12]) 111 #define VTTOIF(indx) (vttoif_tab[(int)(indx)]) 112 113 #if 0 114 static void 115 print_node(const char *func, puffs_cookie_t opc) 116 { 117 struct puffs_node *pn; 118 struct perfuse_node_data *pnd; 119 struct vattr *vap; 120 121 pn = (struct puffs_node *)opc; 122 pnd = PERFUSE_NODE_DATA(opc); 123 vap = &pn->pn_va; 124 125 printf("%s: \"%s\", opc = %p, nodeid = 0x%"PRIx64" ino = %"PRIu64"\n", 126 func, pnd->pnd_name, opc, pnd->pnd_nodeid, vap->va_fileid); 127 128 return; 129 } 130 #endif /* PERFUSE_DEBUG */ 131 132 int 133 perfuse_node_close_common(struct puffs_usermount *pu, puffs_cookie_t opc, 134 int mode) 135 { 136 struct perfuse_state *ps; 137 perfuse_msg_t *pm; 138 int op; 139 uint64_t fh; 140 struct fuse_release_in *fri; 141 struct perfuse_node_data *pnd; 142 struct puffs_node *pn; 143 int error; 144 145 ps = puffs_getspecific(pu); 146 pn = (struct puffs_node *)opc; 147 pnd = PERFUSE_NODE_DATA(pn); 148 149 if (puffs_pn_getvap(pn)->va_type == VDIR) { 150 op = FUSE_RELEASEDIR; 151 mode = FREAD; 152 } else { 153 op = FUSE_RELEASE; 154 } 155 156 /* 157 * Destroy the filehandle before sending the 158 * request to the FUSE filesystem, otherwise 159 * we may get a second close() while we wait 160 * for the reply, and we would end up closing 161 * the same fh twice instead of closng both. 162 */ 163 fh = perfuse_get_fh(opc, mode); 164 perfuse_destroy_fh(pn, fh); 165 166 /* 167 * release_flags may be set to FUSE_RELEASE_FLUSH 168 * to flush locks. lock_owner must be set in that case 169 * 170 * ps_new_msg() is called with NULL creds, which will 171 * be interpreted as FUSE superuser. We come here from the 172 * inactive method, which provides no creds, but obviously 173 * runs with kernel privilege. 174 */ 175 pm = ps->ps_new_msg(pu, opc, op, sizeof(*fri), NULL); 176 fri = GET_INPAYLOAD(ps, pm, fuse_release_in); 177 fri->fh = fh; 178 fri->flags = 0; 179 fri->release_flags = 0; 180 fri->lock_owner = pnd->pnd_lock_owner; 181 fri->flags = (fri->lock_owner != 0) ? FUSE_RELEASE_FLUSH : 0; 182 183 #ifdef PERFUSE_DEBUG 184 if (perfuse_diagflags & PDF_FH) 185 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", fh = 0x%"PRIx64"\n", 186 __func__, (void *)opc, pnd->pnd_nodeid, fri->fh); 187 #endif 188 189 if ((error = xchg_msg(pu, opc, pm, 190 NO_PAYLOAD_REPLY_LEN, wait_reply)) != 0) 191 DERRX(EX_SOFTWARE, "%s: freed fh = 0x%"PRIx64" but filesystem " 192 "returned error = %d", __func__, fh, error); 193 194 ps->ps_destroy_msg(pm); 195 196 return 0; 197 } 198 199 static int 200 xchg_msg(struct puffs_usermount *pu, puffs_cookie_t opc, perfuse_msg_t *pm, 201 size_t len, enum perfuse_xchg_pb_reply wait) 202 { 203 struct perfuse_state *ps; 204 struct perfuse_node_data *pnd; 205 struct perfuse_trace *pt = NULL; 206 int error; 207 208 ps = puffs_getspecific(pu); 209 pnd = NULL; 210 if ((struct puffs_node *)opc != NULL) 211 pnd = PERFUSE_NODE_DATA(opc); 212 213 #ifdef PERFUSE_DEBUG 214 if ((perfuse_diagflags & PDF_FILENAME) && (opc != 0)) 215 DPRINTF("file = \"%s\", ino = %"PRIu64" flags = 0x%x\n", 216 perfuse_node_path(opc), 217 ((struct puffs_node *)opc)->pn_va.va_fileid, 218 PERFUSE_NODE_DATA(opc)->pnd_flags); 219 #endif 220 if (pnd) 221 pnd->pnd_flags |= PND_INXCHG; 222 223 /* 224 * Record FUSE call start if requested 225 */ 226 if (perfuse_diagflags & PDF_TRACE) 227 pt = perfuse_trace_begin(ps, opc, pm); 228 229 /* 230 * Do actual FUSE exchange 231 */ 232 if ((error = ps->ps_xchg_msg(pu, pm, len, wait)) != 0) 233 ps->ps_destroy_msg(pm); 234 235 /* 236 * Record FUSE call end if requested 237 */ 238 if (pt != NULL) 239 perfuse_trace_end(ps, pt, error); 240 241 if (pnd) { 242 pnd->pnd_flags &= ~PND_INXCHG; 243 (void)dequeue_requests(ps, opc, PCQ_AFTERXCHG, DEQUEUE_ALL); 244 } 245 246 return error; 247 } 248 249 static int 250 mode_access(puffs_cookie_t opc, const struct puffs_cred *pcr, mode_t mode) 251 { 252 struct puffs_node *pn; 253 struct vattr *va; 254 255 /* 256 * pcr is NULL for self open through fsync or readdir. 257 * In both case, access control is useless, as it was 258 * done before, at open time. 259 */ 260 if (pcr == NULL) 261 return 0; 262 263 pn = (struct puffs_node *)opc; 264 va = puffs_pn_getvap(pn); 265 return puffs_access(va->va_type, va->va_mode, 266 va->va_uid, va->va_gid, 267 mode, pcr); 268 } 269 270 static int 271 sticky_access(struct puffs_node *targ, const struct puffs_cred *pcr) 272 { 273 uid_t uid; 274 struct puffs_node *tdir; 275 int sticky, owner; 276 277 tdir = PERFUSE_NODE_DATA(targ)->pnd_parent; 278 279 /* 280 * This covers the case where the kernel requests a DELETE 281 * or RENAME on its own, and where puffs_cred_getuid would 282 * return -1. While such a situation should not happen, 283 * we allow it here. 284 * 285 * This also allows root to tamper with other users' files 286 * that have the sticky bit. 287 */ 288 if (puffs_cred_isjuggernaut(pcr)) 289 return 0; 290 291 if (puffs_cred_getuid(pcr, &uid) != 0) 292 DERRX(EX_SOFTWARE, "puffs_cred_getuid fails in %s", __func__); 293 294 sticky = puffs_pn_getvap(tdir)->va_mode & S_ISTXT; 295 owner = puffs_pn_getvap(targ)->va_uid == uid; 296 297 if (sticky && !owner) 298 return EACCES; 299 300 return 0; 301 } 302 303 304 static void 305 fuse_attr_to_vap(struct perfuse_state *ps, struct vattr *vap, 306 struct fuse_attr *fa) 307 { 308 vap->va_type = IFTOVT(fa->mode); 309 vap->va_mode = fa->mode & ALLPERMS; 310 vap->va_nlink = fa->nlink; 311 vap->va_uid = fa->uid; 312 vap->va_gid = fa->gid; 313 vap->va_fsid = (long)ps->ps_fsid; 314 vap->va_fileid = fa->ino; 315 vap->va_size = fa->size; 316 vap->va_blocksize = fa->blksize; 317 vap->va_atime.tv_sec = (time_t)fa->atime; 318 vap->va_atime.tv_nsec = (long) fa->atimensec; 319 vap->va_mtime.tv_sec = (time_t)fa->mtime; 320 vap->va_mtime.tv_nsec = (long)fa->mtimensec; 321 vap->va_ctime.tv_sec = (time_t)fa->ctime; 322 vap->va_ctime.tv_nsec = (long)fa->ctimensec; 323 vap->va_birthtime.tv_sec = 0; 324 vap->va_birthtime.tv_nsec = 0; 325 vap->va_gen = 0; 326 vap->va_flags = 0; 327 vap->va_rdev = fa->rdev; 328 vap->va_bytes = fa->size; 329 vap->va_filerev = (u_quad_t)PUFFS_VNOVAL; 330 vap->va_vaflags = 0; 331 332 if (vap->va_blocksize == 0) 333 vap->va_blocksize = DEV_BSIZE; 334 335 if (vap->va_size == (size_t)PUFFS_VNOVAL) /* XXX */ 336 vap->va_size = 0; 337 338 return; 339 } 340 341 #ifdef PUFFS_KFLAG_CACHE_FS_TTL 342 static void perfuse_newinfo_setttl(struct puffs_newinfo *pni, 343 struct fuse_entry_out *feo, struct fuse_attr_out *fao) 344 { 345 #ifdef PERFUSE_DEBUG 346 if ((feo == NULL) && (fao == NULL)) 347 DERRX(EX_SOFTWARE, "%s: feo and fao NULL", __func__); 348 349 if ((feo != NULL) && (fao != NULL)) 350 DERRX(EX_SOFTWARE, "%s: feo and fao != NULL", __func__); 351 #endif /* PERFUSE_DEBUG */ 352 353 if (fao != NULL) { 354 struct timespec va_ttl; 355 356 va_ttl.tv_sec = fao->attr_valid; 357 va_ttl.tv_nsec = fao->attr_valid_nsec; 358 359 puffs_newinfo_setvattl(pni, &va_ttl); 360 } 361 362 if (feo != NULL) { 363 struct timespec va_ttl; 364 struct timespec cn_ttl; 365 366 va_ttl.tv_sec = feo->attr_valid; 367 va_ttl.tv_nsec = feo->attr_valid_nsec; 368 cn_ttl.tv_sec = feo->entry_valid; 369 cn_ttl.tv_nsec = feo->entry_valid_nsec; 370 371 puffs_newinfo_setvattl(pni, &va_ttl); 372 puffs_newinfo_setcnttl(pni, &cn_ttl); 373 } 374 375 return; 376 } 377 #else /* PUFFS_KFLAG_CACHE_FS_TTL */ 378 static void 379 set_expire(puffs_cookie_t opc, struct fuse_entry_out *feo, 380 struct fuse_attr_out *fao) 381 { 382 struct puffs_node *pn = (struct puffs_node *)opc; 383 struct perfuse_node_data *pnd = PERFUSE_NODE_DATA(opc); 384 struct timespec entry_ts; 385 struct timespec attr_ts; 386 struct timespec now; 387 388 if (clock_gettime(CLOCK_REALTIME, &now) != 0) 389 DERR(EX_OSERR, "clock_gettime failed"); 390 391 if ((feo == NULL) && (fao == NULL)) 392 DERRX(EX_SOFTWARE, "%s: feo and fao NULL", __func__); 393 394 if ((feo != NULL) && (fao != NULL)) 395 DERRX(EX_SOFTWARE, "%s: feo and fao != NULL", __func__); 396 397 if (feo != NULL) { 398 entry_ts.tv_sec = (time_t)feo->entry_valid; 399 entry_ts.tv_nsec = (long)feo->entry_valid_nsec; 400 401 timespecadd(&now, &entry_ts, &pnd->pnd_entry_expire); 402 403 attr_ts.tv_sec = (time_t)feo->attr_valid; 404 attr_ts.tv_nsec = (long)feo->attr_valid_nsec; 405 406 timespecadd(&now, &attr_ts, &pnd->pnd_attr_expire); 407 } 408 409 if (fao != NULL) { 410 attr_ts.tv_sec = (time_t)fao->attr_valid; 411 attr_ts.tv_nsec = (long)fao->attr_valid_nsec; 412 413 timespecadd(&now, &attr_ts, &pnd->pnd_attr_expire); 414 } 415 416 return; 417 } 418 419 static int 420 attr_expired(puffs_cookie_t opc) 421 { 422 struct perfuse_node_data *pnd; 423 struct timespec expire; 424 struct timespec now; 425 426 pnd = PERFUSE_NODE_DATA(opc); 427 expire = pnd->pnd_attr_expire; 428 429 if (clock_gettime(CLOCK_REALTIME, &now) != 0) 430 DERR(EX_OSERR, "clock_gettime failed"); 431 432 return timespeccmp(&expire, &now, <); 433 } 434 435 static int 436 entry_expired(puffs_cookie_t opc) 437 { 438 struct perfuse_node_data *pnd; 439 struct timespec expire; 440 struct timespec now; 441 442 pnd = PERFUSE_NODE_DATA(opc); 443 expire = pnd->pnd_entry_expire; 444 445 if (clock_gettime(CLOCK_REALTIME, &now) != 0) 446 DERR(EX_OSERR, "clock_gettime failed"); 447 448 return timespeccmp(&expire, &now, <); 449 } 450 #endif /* PUFFS_KFLAG_CACHE_FS_TTL */ 451 452 453 /* 454 * Lookup name in directory opc 455 * We take special care of name being . or .. 456 * These are returned by readdir and deserve tweaks. 457 */ 458 static int 459 node_lookup_dir_nodot(struct puffs_usermount *pu, puffs_cookie_t opc, 460 char *name, size_t namelen, struct puffs_node **pnp) 461 { 462 /* 463 * "dot" is easy as we already know it 464 */ 465 if (strncmp(name, ".", namelen) == 0) { 466 *pnp = (struct puffs_node *)opc; 467 return 0; 468 } 469 470 /* 471 * "dotdot" is also known 472 */ 473 if (strncmp(name, "..", namelen) == 0) { 474 *pnp = PERFUSE_NODE_DATA(opc)->pnd_parent; 475 return 0; 476 } 477 478 return node_lookup_common(pu, opc, NULL, name, NULL, pnp); 479 } 480 481 static int 482 node_lookup_common(struct puffs_usermount *pu, puffs_cookie_t opc, 483 struct puffs_newinfo *pni, const char *path, 484 const struct puffs_cred *pcr, struct puffs_node **pnp) 485 { 486 struct perfuse_state *ps; 487 struct perfuse_node_data *oldpnd; 488 perfuse_msg_t *pm; 489 struct fuse_entry_out *feo; 490 struct puffs_node *pn; 491 size_t len; 492 int error; 493 494 /* 495 * Prevent further lookups if the parent was removed 496 */ 497 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 498 return ESTALE; 499 500 if (pnp == NULL) 501 DERRX(EX_SOFTWARE, "pnp must be != NULL"); 502 503 ps = puffs_getspecific(pu); 504 505 #ifdef PERFUSE_DEBUG 506 if (perfuse_diagflags & PDF_FILENAME) 507 DPRINTF("%s: opc = %p, file = \"%s\" looking up \"%s\"\n", 508 __func__, (void *)opc, perfuse_node_path(opc), path); 509 #endif 510 /* 511 * Is the node already known? 512 */ 513 TAILQ_FOREACH(oldpnd, &PERFUSE_NODE_DATA(opc)->pnd_children, pnd_next) { 514 if ((oldpnd->pnd_flags & PND_REMOVED) || 515 (strcmp(oldpnd->pnd_name, path) != 0)) 516 continue; 517 518 #ifdef PERFUSE_DEBUG 519 if (perfuse_diagflags & PDF_FILENAME) 520 DPRINTF("%s: opc = %p, file = \"%s\" found " 521 "cookie = %p, nodeid = 0x%"PRIx64" " 522 "for \"%s\"\n", __func__, 523 (void *)opc, perfuse_node_path(opc), 524 (void *)oldpnd->pnd_pn, oldpnd->pnd_nodeid, 525 path); 526 #endif 527 break; 528 } 529 530 #ifndef PUFFS_KFLAG_CACHE_FS_TTL 531 /* 532 * Check for cached name 533 */ 534 if ((oldpnd != NULL) && !entry_expired(oldpnd->pnd_pn)) { 535 oldpnd->pnd_puffs_nlookup++; 536 *pnp = oldpnd->pnd_pn; 537 return 0; 538 } 539 #endif /* PUFFS_KFLAG_CACHE_FS_TTL */ 540 541 len = strlen(path) + 1; 542 543 pm = ps->ps_new_msg(pu, opc, FUSE_LOOKUP, len, pcr); 544 (void)strlcpy(_GET_INPAYLOAD(ps, pm, char *), path, len); 545 546 error = xchg_msg(pu, opc, pm, sizeof(*feo), wait_reply); 547 548 switch (error) { 549 case 0: 550 break; 551 case ENOENT: 552 if (oldpnd != NULL) { 553 oldpnd->pnd_flags |= PND_REMOVED; 554 #ifdef PERFUSE_DEBUG 555 if (perfuse_diagflags & PDF_FILENAME) 556 DPRINTF("%s: opc = %p nodeid = 0x%"PRIx64" " 557 "file = \"%s\" removed\n", __func__, 558 oldpnd->pnd_pn, oldpnd->pnd_nodeid, 559 oldpnd->pnd_name); 560 #endif 561 } 562 /* FALLTHROUGH */ 563 default: 564 return error; 565 /* NOTREACHED */ 566 break; 567 } 568 569 feo = GET_OUTPAYLOAD(ps, pm, fuse_entry_out); 570 571 pn = NULL; 572 if (oldpnd != NULL) { 573 if (oldpnd->pnd_nodeid == feo->nodeid) { 574 oldpnd->pnd_fuse_nlookup++; 575 oldpnd->pnd_puffs_nlookup++; 576 pn = oldpnd->pnd_pn; 577 } else { 578 oldpnd->pnd_flags |= PND_REMOVED; 579 #ifdef PERFUSE_DEBUG 580 if (perfuse_diagflags & PDF_FILENAME) 581 DPRINTF("%s: opc = %p nodeid = 0x%"PRIx64" " 582 "file = \"%s\" replaced\n", __func__, 583 oldpnd->pnd_pn, oldpnd->pnd_nodeid, 584 oldpnd->pnd_name); 585 #endif 586 } 587 } 588 589 if (pn == NULL) { 590 pn = perfuse_new_pn(pu, path, opc); 591 PERFUSE_NODE_DATA(pn)->pnd_nodeid = feo->nodeid; 592 } 593 594 fuse_attr_to_vap(ps, &pn->pn_va, &feo->attr); 595 pn->pn_va.va_gen = (u_long)(feo->generation); 596 #ifndef PUFFS_KFLAG_CACHE_FS_TTL 597 set_expire((puffs_cookie_t)pn, feo, NULL); 598 #endif /* PUFFS_KFLAG_CACHE_FS_TTL */ 599 600 *pnp = pn; 601 602 #ifdef PERFUSE_DEBUG 603 if (perfuse_diagflags & PDF_FILENAME) 604 DPRINTF("%s: opc = %p, looked up opc = %p, " 605 "nodeid = 0x%"PRIx64" file = \"%s\"\n", __func__, 606 (void *)opc, pn, feo->nodeid, path); 607 #endif 608 609 if (pni != NULL) { 610 #ifdef PUFFS_KFLAG_CACHE_FS_TTL 611 puffs_newinfo_setva(pni, &pn->pn_va); 612 perfuse_newinfo_setttl(pni, feo, NULL); 613 #endif /* PUFFS_KFLAG_CACHE_FS_TTL */ 614 puffs_newinfo_setcookie(pni, pn); 615 puffs_newinfo_setvtype(pni, pn->pn_va.va_type); 616 puffs_newinfo_setsize(pni, (voff_t)pn->pn_va.va_size); 617 puffs_newinfo_setrdev(pni, pn->pn_va.va_rdev); 618 } 619 620 ps->ps_destroy_msg(pm); 621 622 return 0; 623 } 624 625 626 /* 627 * Common code for methods that create objects: 628 * perfuse_node_mkdir 629 * perfuse_node_mknod 630 * perfuse_node_symlink 631 */ 632 static int 633 node_mk_common(struct puffs_usermount *pu, puffs_cookie_t opc, 634 struct puffs_newinfo *pni, const struct puffs_cn *pcn, 635 perfuse_msg_t *pm) 636 { 637 struct perfuse_state *ps; 638 struct puffs_node *pn; 639 struct fuse_entry_out *feo; 640 int error; 641 642 ps = puffs_getspecific(pu); 643 644 if ((error = xchg_msg(pu, opc, pm, sizeof(*feo), wait_reply)) != 0) 645 return error; 646 647 feo = GET_OUTPAYLOAD(ps, pm, fuse_entry_out); 648 if (feo->nodeid == PERFUSE_UNKNOWN_NODEID) 649 DERRX(EX_SOFTWARE, "%s: no nodeid", __func__); 650 651 pn = perfuse_new_pn(pu, pcn->pcn_name, opc); 652 PERFUSE_NODE_DATA(pn)->pnd_nodeid = feo->nodeid; 653 654 fuse_attr_to_vap(ps, &pn->pn_va, &feo->attr); 655 pn->pn_va.va_gen = (u_long)(feo->generation); 656 657 puffs_newinfo_setcookie(pni, pn); 658 #ifdef PUFFS_KFLAG_CACHE_FS_TTL 659 puffs_newinfo_setva(pni, &pn->pn_va); 660 perfuse_newinfo_setttl(pni, feo, NULL); 661 #else 662 set_expire((puffs_cookie_t)pn, feo, NULL); 663 #endif 664 665 666 #ifdef PERFUSE_DEBUG 667 if (perfuse_diagflags & PDF_FILENAME) 668 DPRINTF("%s: opc = %p, file = \"%s\", flags = 0x%x " 669 "nodeid = 0x%"PRIx64"\n", 670 __func__, (void *)pn, pcn->pcn_name, 671 PERFUSE_NODE_DATA(pn)->pnd_flags, feo->nodeid); 672 #endif 673 ps->ps_destroy_msg(pm); 674 675 /* Parents is now dirty */ 676 PERFUSE_NODE_DATA(opc)->pnd_flags |= PND_DIRTY; 677 678 return 0; 679 } 680 681 static uint64_t 682 readdir_last_cookie(struct fuse_dirent *fd, size_t fd_len) 683 { 684 size_t len; 685 size_t seen = 0; 686 char *ndp; 687 688 do { 689 len = FUSE_DIRENT_ALIGN(sizeof(*fd) + fd->namelen); 690 seen += len; 691 692 if (seen >= fd_len) 693 break; 694 695 ndp = (char *)(void *)fd + (size_t)len; 696 fd = (struct fuse_dirent *)(void *)ndp; 697 } while (1 /* CONSTCOND */); 698 699 return fd->off; 700 } 701 702 static ssize_t 703 fuse_to_dirent(struct puffs_usermount *pu, puffs_cookie_t opc, 704 struct fuse_dirent *fd, size_t fd_len) 705 { 706 struct dirent *dents; 707 size_t dents_len; 708 ssize_t written; 709 uint64_t fd_offset; 710 struct fuse_dirent *fd_base; 711 size_t len; 712 713 fd_base = fd; 714 fd_offset = 0; 715 written = 0; 716 dents = PERFUSE_NODE_DATA(opc)->pnd_dirent; 717 dents_len = (size_t)PERFUSE_NODE_DATA(opc)->pnd_dirent_len; 718 719 do { 720 char *ndp; 721 size_t reclen; 722 723 reclen = _DIRENT_RECLEN(dents, fd->namelen); 724 725 /* 726 * Check we do not overflow the output buffer 727 * struct fuse_dirent is bigger than struct dirent, 728 * so we should always use fd_len and never reallocate 729 * later. 730 * If we have to reallocate,try to double the buffer 731 * each time so that we do not have to do it too often. 732 */ 733 if (written + reclen > dents_len) { 734 if (dents_len == 0) 735 dents_len = fd_len; 736 else 737 dents_len = 738 MAX(2 * dents_len, written + reclen); 739 740 dents = PERFUSE_NODE_DATA(opc)->pnd_dirent; 741 if ((dents = realloc(dents, dents_len)) == NULL) 742 DERR(EX_OSERR, "%s: malloc failed", __func__); 743 744 PERFUSE_NODE_DATA(opc)->pnd_dirent = dents; 745 PERFUSE_NODE_DATA(opc)->pnd_dirent_len = dents_len; 746 747 /* 748 * (void *) for delint 749 */ 750 ndp = (char *)(void *)dents + written; 751 dents = (struct dirent *)(void *)ndp; 752 } 753 754 /* 755 * Filesystem was mounted without -o use_ino 756 * Perform a lookup to find it. 757 */ 758 if (fd->ino == PERFUSE_UNKNOWN_INO) { 759 struct puffs_node *pn; 760 761 if (node_lookup_dir_nodot(pu, opc, fd->name, 762 fd->namelen, &pn) != 0) { 763 DWARNX("node_lookup_dir_nodot failed"); 764 } else { 765 fd->ino = pn->pn_va.va_fileid; 766 } 767 } 768 769 dents->d_fileno = fd->ino; 770 dents->d_reclen = (unsigned short)reclen; 771 dents->d_namlen = fd->namelen; 772 dents->d_type = fd->type; 773 strlcpy(dents->d_name, fd->name, fd->namelen + 1); 774 775 #ifdef PERFUSE_DEBUG 776 if (perfuse_diagflags & PDF_READDIR) 777 DPRINTF("%s: translated \"%s\" ino = %"PRIu64"\n", 778 __func__, dents->d_name, dents->d_fileno); 779 #endif 780 781 dents = _DIRENT_NEXT(dents); 782 written += reclen; 783 784 /* 785 * Move to the next record. 786 * fd->off is not the offset, it is an opaque cookie 787 * given by the filesystem to keep state across multiple 788 * readdir() operation. 789 * Use record alignement instead. 790 */ 791 len = FUSE_DIRENT_ALIGN(sizeof(*fd) + fd->namelen); 792 #ifdef PERFUSE_DEBUG 793 if (perfuse_diagflags & PDF_READDIR) 794 DPRINTF("%s: record at %"PRId64"/0x%"PRIx64" " 795 "length = %zd/0x%zx. " 796 "next record at %"PRId64"/0x%"PRIx64" " 797 "max %zd/0x%zx\n", 798 __func__, fd_offset, fd_offset, len, len, 799 fd_offset + len, fd_offset + len, 800 fd_len, fd_len); 801 #endif 802 fd_offset += len; 803 804 /* 805 * Check if next record is still within the packet 806 * If it is not, we reached the end of the buffer. 807 */ 808 if (fd_offset >= fd_len) 809 break; 810 811 /* 812 * (void *) for delint 813 */ 814 ndp = (char *)(void *)fd_base + (size_t)fd_offset; 815 fd = (struct fuse_dirent *)(void *)ndp; 816 817 } while (1 /* CONSTCOND */); 818 819 /* 820 * Adjust the dirent output length 821 */ 822 if (written != -1) 823 PERFUSE_NODE_DATA(opc)->pnd_dirent_len = written; 824 825 return written; 826 } 827 828 static int 829 readdir_buffered(puffs_cookie_t opc, struct dirent *dent, off_t *readoff, 830 size_t *reslen) 831 { 832 struct dirent *fromdent; 833 struct perfuse_node_data *pnd; 834 char *ndp; 835 836 pnd = PERFUSE_NODE_DATA(opc); 837 838 while (*readoff < pnd->pnd_dirent_len) { 839 /* 840 * (void *) for delint 841 */ 842 ndp = (char *)(void *)pnd->pnd_dirent + (size_t)*readoff; 843 fromdent = (struct dirent *)(void *)ndp; 844 845 if (*reslen < _DIRENT_SIZE(fromdent)) 846 break; 847 848 memcpy(dent, fromdent, _DIRENT_SIZE(fromdent)); 849 *readoff += _DIRENT_SIZE(fromdent); 850 *reslen -= _DIRENT_SIZE(fromdent); 851 852 dent = _DIRENT_NEXT(dent); 853 } 854 855 #ifdef PERFUSE_DEBUG 856 if (perfuse_diagflags & PDF_READDIR) 857 DPRINTF("%s: readoff = %"PRId64", " 858 "pnd->pnd_dirent_len = %"PRId64"\n", 859 __func__, *readoff, pnd->pnd_dirent_len); 860 #endif 861 if (*readoff >= pnd->pnd_dirent_len) { 862 free(pnd->pnd_dirent); 863 pnd->pnd_dirent = NULL; 864 pnd->pnd_dirent_len = 0; 865 } 866 867 return 0; 868 } 869 870 static void 871 requeue_request(struct puffs_usermount *pu, puffs_cookie_t opc, 872 enum perfuse_qtype type) 873 { 874 struct perfuse_cc_queue pcq; 875 struct perfuse_node_data *pnd; 876 #ifdef PERFUSE_DEBUG 877 struct perfuse_state *ps; 878 879 ps = perfuse_getspecific(pu); 880 #endif 881 882 pnd = PERFUSE_NODE_DATA(opc); 883 pcq.pcq_type = type; 884 pcq.pcq_cc = puffs_cc_getcc(pu); 885 TAILQ_INSERT_TAIL(&pnd->pnd_pcq, &pcq, pcq_next); 886 887 #ifdef PERFUSE_DEBUG 888 if (perfuse_diagflags & PDF_REQUEUE) 889 DPRINTF("%s: REQUEUE opc = %p, pcc = %p (%s)\n", 890 __func__, (void *)opc, pcq.pcq_cc, 891 perfuse_qtypestr[type]); 892 #endif 893 894 puffs_cc_yield(pcq.pcq_cc); 895 TAILQ_REMOVE(&pnd->pnd_pcq, &pcq, pcq_next); 896 897 #ifdef PERFUSE_DEBUG 898 if (perfuse_diagflags & PDF_REQUEUE) 899 DPRINTF("%s: RESUME opc = %p, pcc = %p (%s)\n", 900 __func__, (void *)opc, pcq.pcq_cc, 901 perfuse_qtypestr[type]); 902 #endif 903 904 return; 905 } 906 907 /* ARGSUSED0 */ 908 static int 909 dequeue_requests(struct perfuse_state *ps, puffs_cookie_t opc, 910 enum perfuse_qtype type, int max) 911 { 912 struct perfuse_cc_queue *pcq; 913 struct perfuse_node_data *pnd; 914 int dequeued; 915 916 pnd = PERFUSE_NODE_DATA(opc); 917 dequeued = 0; 918 TAILQ_FOREACH(pcq, &pnd->pnd_pcq, pcq_next) { 919 if (pcq->pcq_type != type) 920 continue; 921 922 #ifdef PERFUSE_DEBUG 923 if (perfuse_diagflags & PDF_REQUEUE) 924 DPRINTF("%s: SCHEDULE opc = %p, pcc = %p (%s)\n", 925 __func__, (void *)opc, pcq->pcq_cc, 926 perfuse_qtypestr[type]); 927 #endif 928 puffs_cc_schedule(pcq->pcq_cc); 929 930 if (++dequeued == max) 931 break; 932 } 933 934 #ifdef PERFUSE_DEBUG 935 if (perfuse_diagflags & PDF_REQUEUE) 936 DPRINTF("%s: DONE opc = %p\n", __func__, (void *)opc); 937 #endif 938 939 return dequeued; 940 } 941 942 void 943 perfuse_fs_init(struct puffs_usermount *pu) 944 { 945 struct perfuse_state *ps; 946 perfuse_msg_t *pm; 947 struct fuse_init_in *fii; 948 struct fuse_init_out *fio; 949 int error; 950 951 ps = puffs_getspecific(pu); 952 953 if (puffs_mount(pu, ps->ps_target, ps->ps_mountflags, ps->ps_root) != 0) 954 DERR(EX_OSERR, "%s: puffs_mount failed", __func__); 955 956 /* 957 * Linux 2.6.34.1 sends theses flags: 958 * FUSE_ASYNC_READ | FUSE_POSIX_LOCKS | FUSE_ATOMIC_O_TRUNC 959 * FUSE_EXPORT_SUPPORT | FUSE_BIG_WRITES | FUSE_DONT_MASK 960 * 961 * Linux also sets max_readahead at 32 pages (128 kB) 962 * 963 * ps_new_msg() is called with NULL creds, which will 964 * be interpreted as FUSE superuser. 965 */ 966 pm = ps->ps_new_msg(pu, 0, FUSE_INIT, sizeof(*fii), NULL); 967 fii = GET_INPAYLOAD(ps, pm, fuse_init_in); 968 fii->major = FUSE_KERNEL_VERSION; 969 fii->minor = FUSE_KERNEL_MINOR_VERSION; 970 fii->max_readahead = (unsigned int)(32 * sysconf(_SC_PAGESIZE)); 971 fii->flags = (FUSE_ASYNC_READ|FUSE_POSIX_LOCKS|FUSE_ATOMIC_O_TRUNC); 972 973 if ((error = xchg_msg(pu, 0, pm, sizeof(*fio), wait_reply)) != 0) 974 DERRX(EX_SOFTWARE, "init message exchange failed (%d)", error); 975 976 fio = GET_OUTPAYLOAD(ps, pm, fuse_init_out); 977 ps->ps_max_readahead = fio->max_readahead; 978 ps->ps_max_write = fio->max_write; 979 980 ps->ps_destroy_msg(pm); 981 982 return; 983 } 984 985 int 986 perfuse_fs_unmount(struct puffs_usermount *pu, int flags) 987 { 988 perfuse_msg_t *pm; 989 struct perfuse_state *ps; 990 puffs_cookie_t opc; 991 int error; 992 993 ps = puffs_getspecific(pu); 994 opc = (puffs_cookie_t)puffs_getroot(pu); 995 996 /* 997 * ps_new_msg() is called with NULL creds, which will 998 * be interpreted as FUSE superuser. 999 */ 1000 pm = ps->ps_new_msg(pu, opc, FUSE_DESTROY, 0, NULL); 1001 1002 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0){ 1003 DWARN("unmount %s", ps->ps_target); 1004 if (!(flags & MNT_FORCE)) 1005 return error; 1006 else 1007 error = 0; 1008 } else { 1009 ps->ps_destroy_msg(pm); 1010 } 1011 1012 ps->ps_umount(pu); 1013 1014 if (perfuse_diagflags & PDF_MISC) 1015 DPRINTF("%s unmounted, exit\n", ps->ps_target); 1016 1017 return 0; 1018 } 1019 1020 int 1021 perfuse_fs_statvfs(struct puffs_usermount *pu, struct statvfs *svfsb) 1022 { 1023 struct perfuse_state *ps; 1024 perfuse_msg_t *pm; 1025 puffs_cookie_t opc; 1026 struct fuse_statfs_out *fso; 1027 int error; 1028 1029 ps = puffs_getspecific(pu); 1030 opc = (puffs_cookie_t)puffs_getroot(pu); 1031 1032 /* 1033 * ps_new_msg() is called with NULL creds, which will 1034 * be interpreted as FUSE superuser. 1035 */ 1036 pm = ps->ps_new_msg(pu, opc, FUSE_STATFS, 0, NULL); 1037 1038 if ((error = xchg_msg(pu, opc, pm, sizeof(*fso), wait_reply)) != 0) 1039 return error; 1040 1041 fso = GET_OUTPAYLOAD(ps, pm, fuse_statfs_out); 1042 svfsb->f_flag = ps->ps_mountflags; 1043 svfsb->f_bsize = fso->st.bsize; 1044 svfsb->f_frsize = fso->st.frsize; 1045 svfsb->f_iosize = ((struct puffs_node *)opc)->pn_va.va_blocksize; 1046 svfsb->f_blocks = fso->st.blocks; 1047 svfsb->f_bfree = fso->st.bfree; 1048 svfsb->f_bavail = fso->st.bavail; 1049 svfsb->f_bresvd = fso->st.bfree - fso->st.bavail; 1050 svfsb->f_files = fso->st.files; 1051 svfsb->f_ffree = fso->st.ffree; 1052 svfsb->f_favail = fso->st.ffree;/* files not reserved for root */ 1053 svfsb->f_fresvd = 0; /* files reserved for root */ 1054 1055 svfsb->f_syncreads = ps->ps_syncreads; 1056 svfsb->f_syncwrites = ps->ps_syncwrites; 1057 1058 svfsb->f_asyncreads = ps->ps_asyncreads; 1059 svfsb->f_asyncwrites = ps->ps_asyncwrites; 1060 1061 (void)memcpy(&svfsb->f_fsidx, &ps->ps_fsid, sizeof(ps->ps_fsid)); 1062 svfsb->f_fsid = (unsigned long)ps->ps_fsid; 1063 svfsb->f_namemax = MAXPATHLEN; /* XXX */ 1064 svfsb->f_owner = ps->ps_owner_uid; 1065 1066 (void)strlcpy(svfsb->f_mntonname, ps->ps_target, _VFS_NAMELEN); 1067 1068 if (ps->ps_filesystemtype != NULL) 1069 (void)strlcpy(svfsb->f_fstypename, 1070 ps->ps_filesystemtype, _VFS_NAMELEN); 1071 else 1072 (void)strlcpy(svfsb->f_fstypename, "fuse", _VFS_NAMELEN); 1073 1074 if (ps->ps_source != NULL) 1075 strlcpy(svfsb->f_mntfromname, ps->ps_source, _VFS_NAMELEN); 1076 else 1077 strlcpy(svfsb->f_mntfromname, _PATH_FUSE, _VFS_NAMELEN); 1078 1079 ps->ps_destroy_msg(pm); 1080 1081 return 0; 1082 } 1083 1084 int 1085 perfuse_fs_sync(struct puffs_usermount *pu, int waitfor, 1086 const struct puffs_cred *pcr) 1087 { 1088 /* 1089 * FUSE does not seem to have a FS sync callback. 1090 * Maybe do not even register this callback 1091 */ 1092 return puffs_fsnop_sync(pu, waitfor, pcr); 1093 } 1094 1095 /* ARGSUSED0 */ 1096 int 1097 perfuse_fs_fhtonode(struct puffs_usermount *pu, void *fid, size_t fidsize, 1098 struct puffs_newinfo *pni) 1099 { 1100 DERRX(EX_SOFTWARE, "%s: UNIMPLEMENTED (FATAL)", __func__); 1101 return 0; 1102 } 1103 1104 /* ARGSUSED0 */ 1105 int 1106 perfuse_fs_nodetofh(struct puffs_usermount *pu, puffs_cookie_t cookie, 1107 void *fid, size_t *fidsize) 1108 { 1109 DERRX(EX_SOFTWARE, "%s: UNIMPLEMENTED (FATAL)", __func__); 1110 return 0; 1111 } 1112 1113 #if 0 1114 /* ARGSUSED0 */ 1115 void 1116 perfuse_fs_extattrctl(struct puffs_usermount *pu, int cmd, 1117 puffs_cookie_t *cookie, int flags, int namespace, const char *attrname) 1118 { 1119 DERRX(EX_SOFTWARE, "%s: UNIMPLEMENTED (FATAL)", __func__); 1120 return 0; 1121 } 1122 #endif /* 0 */ 1123 1124 /* ARGSUSED0 */ 1125 void 1126 perfuse_fs_suspend(struct puffs_usermount *pu, int status) 1127 { 1128 return; 1129 } 1130 1131 1132 1133 int 1134 perfuse_node_lookup(struct puffs_usermount *pu, puffs_cookie_t opc, 1135 struct puffs_newinfo *pni, const struct puffs_cn *pcn) 1136 { 1137 struct puffs_node *pn; 1138 mode_t mode; 1139 int error; 1140 1141 /* 1142 * Check permissions 1143 */ 1144 switch(pcn->pcn_nameiop) { 1145 case NAMEI_DELETE: /* FALLTHROUGH */ 1146 case NAMEI_RENAME: /* FALLTHROUGH */ 1147 case NAMEI_CREATE: 1148 if (pcn->pcn_flags & NAMEI_ISLASTCN) 1149 mode = PUFFS_VEXEC|PUFFS_VWRITE; 1150 else 1151 mode = PUFFS_VEXEC; 1152 break; 1153 case NAMEI_LOOKUP: /* FALLTHROUGH */ 1154 default: 1155 mode = PUFFS_VEXEC; 1156 break; 1157 } 1158 1159 if ((error = mode_access(opc, pcn->pcn_cred, mode)) != 0) 1160 return error; 1161 1162 /* 1163 * Special case for .. 1164 */ 1165 if (strcmp(pcn->pcn_name, "..") == 0) { 1166 pn = PERFUSE_NODE_DATA(opc)->pnd_parent; 1167 #ifdef PUFFS_KFLAG_CACHE_FS_TTL 1168 puffs_newinfo_setva(pni, &pn->pn_va); 1169 /* XXX cannot call perfuse_newinfo_setttl */ 1170 #endif /* PUFFS_KFLAG_CACHE_FS_TTL */ 1171 puffs_newinfo_setcookie(pni, pn); 1172 puffs_newinfo_setvtype(pni, pn->pn_va.va_type); 1173 puffs_newinfo_setsize(pni, (voff_t)pn->pn_va.va_size); 1174 puffs_newinfo_setrdev(pni, pn->pn_va.va_rdev); 1175 } else { 1176 error = node_lookup_common(pu, (puffs_cookie_t)opc, pni, 1177 pcn->pcn_name, pcn->pcn_cred, &pn); 1178 } 1179 if (error != 0) 1180 return error; 1181 1182 /* 1183 * Kernel would kill us if the filesystem returned the parent 1184 * itself. If we want to live, hide that! 1185 */ 1186 if ((opc == (puffs_cookie_t)pn) && (strcmp(pcn->pcn_name, ".") != 0)) { 1187 DERRX(EX_SOFTWARE, "lookup \"%s\" in \"%s\" returned parent", 1188 pcn->pcn_name, perfuse_node_path(opc)); 1189 /* NOTREACHED */ 1190 return ESTALE; 1191 } 1192 1193 /* 1194 * Removed node 1195 */ 1196 if (PERFUSE_NODE_DATA(pn)->pnd_flags & PND_REMOVED) 1197 return ENOENT; 1198 1199 /* 1200 * Check for sticky bit. Unfortunately there is no way to 1201 * do this before creating the puffs_node, since we require 1202 * this operation to get the node owner. 1203 */ 1204 switch (pcn->pcn_nameiop) { 1205 case NAMEI_DELETE: /* FALLTHROUGH */ 1206 case NAMEI_RENAME: 1207 error = sticky_access(pn, pcn->pcn_cred); 1208 if (error != 0) { 1209 /* 1210 * kernel will never know about it and will 1211 * not reclaim it. The filesystem needs to 1212 * clean it up anyway, therefore mimick a forget. 1213 */ 1214 PERFUSE_NODE_DATA(pn)->pnd_flags |= PND_RECLAIMED; 1215 (void)perfuse_node_reclaim(pu, (puffs_cookie_t)pn); 1216 return error; 1217 } 1218 break; 1219 default: 1220 break; 1221 } 1222 1223 /* 1224 * If that node had a pending reclaim, wipe it out. 1225 */ 1226 PERFUSE_NODE_DATA(pn)->pnd_flags &= ~PND_RECLAIMED; 1227 1228 return error; 1229 } 1230 1231 int 1232 perfuse_node_create(struct puffs_usermount *pu, puffs_cookie_t opc, 1233 struct puffs_newinfo *pni, const struct puffs_cn *pcn, 1234 const struct vattr *vap) 1235 { 1236 perfuse_msg_t *pm; 1237 struct perfuse_state *ps; 1238 struct fuse_create_in *fci; 1239 struct fuse_entry_out *feo; 1240 struct fuse_open_out *foo; 1241 struct puffs_node *pn; 1242 const char *name; 1243 size_t namelen; 1244 size_t len; 1245 int error; 1246 1247 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 1248 return ENOENT; 1249 1250 /* 1251 * If create is unimplemented: Check that it does not 1252 * already exists, and if not, do mknod and open 1253 */ 1254 ps = puffs_getspecific(pu); 1255 if (ps->ps_flags & PS_NO_CREAT) { 1256 error = node_lookup_common(pu, opc, NULL, pcn->pcn_name, 1257 pcn->pcn_cred, &pn); 1258 if (error == 0) 1259 return EEXIST; 1260 1261 error = perfuse_node_mknod(pu, opc, pni, pcn, vap); 1262 if (error != 0) 1263 return error; 1264 1265 error = node_lookup_common(pu, opc, NULL, pcn->pcn_name, 1266 pcn->pcn_cred, &pn); 1267 if (error != 0) 1268 return error; 1269 1270 /* 1271 * FUSE does the open at create time, while 1272 * NetBSD will open in a subsequent operation. 1273 * We need to open now, in order to retain FUSE 1274 * semantics. The calling process will not get 1275 * a file descriptor before the kernel sends 1276 * the open operation. 1277 */ 1278 opc = (puffs_cookie_t)pn; 1279 error = perfuse_node_open(pu, opc, FWRITE, pcn->pcn_cred); 1280 if (error != 0) 1281 return error; 1282 1283 return 0; 1284 } 1285 1286 name = pcn->pcn_name; 1287 namelen = pcn->pcn_namelen + 1; 1288 len = sizeof(*fci) + namelen; 1289 1290 /* 1291 * flags should use O_WRONLY instead of O_RDWR, but it 1292 * breaks when the caller tries to read from file. 1293 * 1294 * mode must contain file type (ie: S_IFREG), use VTTOIF(vap->va_type) 1295 */ 1296 pm = ps->ps_new_msg(pu, opc, FUSE_CREATE, len, pcn->pcn_cred); 1297 fci = GET_INPAYLOAD(ps, pm, fuse_create_in); 1298 fci->flags = O_CREAT | O_TRUNC | O_RDWR; 1299 fci->mode = vap->va_mode | VTTOIF(vap->va_type); 1300 fci->umask = 0; /* Seems unused by libfuse */ 1301 (void)strlcpy((char*)(void *)(fci + 1), name, namelen); 1302 1303 len = sizeof(*feo) + sizeof(*foo); 1304 if ((error = xchg_msg(pu, opc, pm, len, wait_reply)) != 0) { 1305 /* 1306 * create is unimplmented, remember it for later, 1307 * and start over using mknod and open instead. 1308 */ 1309 if (error == ENOSYS) { 1310 ps->ps_flags |= PS_NO_CREAT; 1311 return perfuse_node_create(pu, opc, pni, pcn, vap); 1312 } 1313 1314 return error; 1315 } 1316 1317 feo = GET_OUTPAYLOAD(ps, pm, fuse_entry_out); 1318 foo = (struct fuse_open_out *)(void *)(feo + 1); 1319 if (feo->nodeid == PERFUSE_UNKNOWN_NODEID) 1320 DERRX(EX_SOFTWARE, "%s: no nodeid", __func__); 1321 1322 /* 1323 * Save the file handle and inode in node private data 1324 * so that we can reuse it later 1325 */ 1326 pn = perfuse_new_pn(pu, name, opc); 1327 perfuse_new_fh((puffs_cookie_t)pn, foo->fh, FWRITE); 1328 PERFUSE_NODE_DATA(pn)->pnd_nodeid = feo->nodeid; 1329 1330 fuse_attr_to_vap(ps, &pn->pn_va, &feo->attr); 1331 pn->pn_va.va_gen = (u_long)(feo->generation); 1332 1333 puffs_newinfo_setcookie(pni, pn); 1334 #ifdef PUFFS_KFLAG_CACHE_FS_TTL 1335 puffs_newinfo_setva(pni, &pn->pn_va); 1336 perfuse_newinfo_setttl(pni, feo, NULL); 1337 #else /* PUFFS_KFLAG_CACHE_FS_TTL */ 1338 set_expire((puffs_cookie_t)pn, feo, NULL); 1339 #endif /* PUFFS_KFLAG_CACHE_FS_TTL */ 1340 1341 #ifdef PERFUSE_DEBUG 1342 if (perfuse_diagflags & (PDF_FH|PDF_FILENAME)) 1343 DPRINTF("%s: opc = %p, file = \"%s\", flags = 0x%x " 1344 "nodeid = 0x%"PRIx64", wfh = 0x%"PRIx64"\n", 1345 __func__, (void *)pn, pcn->pcn_name, 1346 PERFUSE_NODE_DATA(pn)->pnd_flags, feo->nodeid, 1347 foo->fh); 1348 #endif 1349 1350 ps->ps_destroy_msg(pm); 1351 1352 return 0; 1353 } 1354 1355 1356 int 1357 perfuse_node_mknod(struct puffs_usermount *pu, puffs_cookie_t opc, 1358 struct puffs_newinfo *pni, const struct puffs_cn *pcn, 1359 const struct vattr *vap) 1360 { 1361 struct perfuse_state *ps; 1362 perfuse_msg_t *pm; 1363 struct fuse_mknod_in *fmi; 1364 const char* path; 1365 size_t len; 1366 1367 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 1368 return ENOENT; 1369 1370 /* 1371 * Only superuser can mknod objects other than 1372 * directories, files, socks, fifo and links. 1373 * 1374 * Create an object require -WX permission in the parent directory 1375 */ 1376 switch (vap->va_type) { 1377 case VDIR: /* FALLTHROUGH */ 1378 case VREG: /* FALLTHROUGH */ 1379 case VFIFO: /* FALLTHROUGH */ 1380 case VSOCK: 1381 break; 1382 default: /* VNON, VBLK, VCHR, VBAD */ 1383 if (!puffs_cred_isjuggernaut(pcn->pcn_cred)) 1384 return EACCES; 1385 break; 1386 } 1387 1388 1389 ps = puffs_getspecific(pu); 1390 path = pcn->pcn_name; 1391 len = sizeof(*fmi) + pcn->pcn_namelen + 1; 1392 1393 /* 1394 * mode must contain file type (ie: S_IFREG), use VTTOIF(vap->va_type) 1395 */ 1396 pm = ps->ps_new_msg(pu, opc, FUSE_MKNOD, len, pcn->pcn_cred); 1397 fmi = GET_INPAYLOAD(ps, pm, fuse_mknod_in); 1398 fmi->mode = vap->va_mode | VTTOIF(vap->va_type); 1399 fmi->rdev = (uint32_t)vap->va_rdev; 1400 fmi->umask = 0; /* Seems unused bu libfuse */ 1401 (void)strlcpy((char *)(void *)(fmi + 1), path, len - sizeof(*fmi)); 1402 1403 return node_mk_common(pu, opc, pni, pcn, pm); 1404 } 1405 1406 1407 int 1408 perfuse_node_open(struct puffs_usermount *pu, puffs_cookie_t opc, int mode, 1409 const struct puffs_cred *pcr) 1410 { 1411 struct perfuse_state *ps; 1412 struct perfuse_node_data *pnd; 1413 perfuse_msg_t *pm; 1414 mode_t fmode; 1415 int op; 1416 struct fuse_open_in *foi; 1417 struct fuse_open_out *foo; 1418 struct puffs_node *pn; 1419 int error; 1420 1421 ps = puffs_getspecific(pu); 1422 pn = (struct puffs_node *)opc; 1423 pnd = PERFUSE_NODE_DATA(opc); 1424 error = 0; 1425 1426 if (pnd->pnd_flags & PND_REMOVED) 1427 return ENOENT; 1428 1429 if (puffs_pn_getvap(pn)->va_type == VDIR) 1430 op = FUSE_OPENDIR; 1431 else 1432 op = FUSE_OPEN; 1433 1434 /* 1435 * libfuse docs says 1436 * - O_CREAT and O_EXCL should never be set. 1437 * - O_TRUNC may be used if mount option atomic_o_trunc is used XXX 1438 * 1439 * O_APPEND makes no sense since FUSE always sends 1440 * the file offset for write operations. If the 1441 * filesystem uses pwrite(), O_APPEND would cause 1442 * the offset to be ignored and cause file corruption. 1443 */ 1444 mode &= ~(O_CREAT|O_EXCL|O_APPEND); 1445 1446 /* 1447 * Do not open twice, and do not reopen for reading 1448 * if we already have write handle. 1449 */ 1450 if (((mode & FREAD) && (pnd->pnd_flags & PND_RFH)) || 1451 ((mode & FREAD) && (pnd->pnd_flags & PND_WFH)) || 1452 ((mode & FWRITE) && (pnd->pnd_flags & PND_WFH))) 1453 goto out; 1454 1455 /* 1456 * Queue open on a node so that we do not open 1457 * twice. This would be better with read and 1458 * write distinguished. 1459 */ 1460 while (pnd->pnd_flags & PND_INOPEN) 1461 requeue_request(pu, opc, PCQ_OPEN); 1462 pnd->pnd_flags |= PND_INOPEN; 1463 1464 /* 1465 * Convert PUFFS mode to FUSE mode: convert FREAD/FWRITE 1466 * to O_RDONLY/O_WRONLY while perserving the other options. 1467 */ 1468 fmode = mode & ~(FREAD|FWRITE); 1469 fmode |= (mode & FWRITE) ? O_RDWR : O_RDONLY; 1470 1471 pm = ps->ps_new_msg(pu, opc, op, sizeof(*foi), pcr); 1472 foi = GET_INPAYLOAD(ps, pm, fuse_open_in); 1473 foi->flags = fmode; 1474 foi->unused = 0; 1475 1476 if ((error = xchg_msg(pu, opc, pm, sizeof(*foo), wait_reply)) != 0) 1477 goto out; 1478 1479 foo = GET_OUTPAYLOAD(ps, pm, fuse_open_out); 1480 1481 /* 1482 * Save the file handle in node private data 1483 * so that we can reuse it later 1484 */ 1485 perfuse_new_fh(opc, foo->fh, mode); 1486 1487 #ifdef PERFUSE_DEBUG 1488 if (perfuse_diagflags & (PDF_FH|PDF_FILENAME)) 1489 DPRINTF("%s: opc = %p, file = \"%s\", " 1490 "nodeid = 0x%"PRIx64", %s%sfh = 0x%"PRIx64"\n", 1491 __func__, (void *)opc, perfuse_node_path(opc), 1492 pnd->pnd_nodeid, mode & FREAD ? "r" : "", 1493 mode & FWRITE ? "w" : "", foo->fh); 1494 #endif 1495 1496 ps->ps_destroy_msg(pm); 1497 out: 1498 1499 pnd->pnd_flags &= ~PND_INOPEN; 1500 (void)dequeue_requests(ps, opc, PCQ_OPEN, DEQUEUE_ALL); 1501 1502 return error; 1503 } 1504 1505 /* ARGSUSED0 */ 1506 int 1507 perfuse_node_close(struct puffs_usermount *pu, puffs_cookie_t opc, int flags, 1508 const struct puffs_cred *pcr) 1509 { 1510 struct perfuse_node_data *pnd; 1511 1512 pnd = PERFUSE_NODE_DATA(opc); 1513 1514 if (!(pnd->pnd_flags & PND_OPEN)) 1515 return EBADF; 1516 1517 /* 1518 * Actual close is postponed at inactive time. 1519 */ 1520 return 0; 1521 } 1522 1523 int 1524 perfuse_node_access(struct puffs_usermount *pu, puffs_cookie_t opc, int mode, 1525 const struct puffs_cred *pcr) 1526 { 1527 perfuse_msg_t *pm; 1528 struct perfuse_state *ps; 1529 struct fuse_access_in *fai; 1530 int error; 1531 1532 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 1533 return ENOENT; 1534 1535 /* 1536 * If we previously detected the filesystem does not 1537 * implement access(), short-circuit the call and skip 1538 * to libpuffs access() emulation. 1539 */ 1540 ps = puffs_getspecific(pu); 1541 if (ps->ps_flags & PS_NO_ACCESS) { 1542 const struct vattr *vap; 1543 1544 vap = puffs_pn_getvap((struct puffs_node *)opc); 1545 1546 error = puffs_access(IFTOVT(vap->va_mode), 1547 vap->va_mode & ACCESSPERMS, 1548 vap->va_uid, vap->va_gid, 1549 (mode_t)mode, pcr); 1550 return error; 1551 } 1552 1553 /* 1554 * Plain access call 1555 */ 1556 pm = ps->ps_new_msg(pu, opc, FUSE_ACCESS, sizeof(*fai), pcr); 1557 fai = GET_INPAYLOAD(ps, pm, fuse_access_in); 1558 fai->mask = 0; 1559 fai->mask |= (mode & PUFFS_VREAD) ? R_OK : 0; 1560 fai->mask |= (mode & PUFFS_VWRITE) ? W_OK : 0; 1561 fai->mask |= (mode & PUFFS_VEXEC) ? X_OK : 0; 1562 1563 error = xchg_msg(pu, opc, pm, NO_PAYLOAD_REPLY_LEN, wait_reply); 1564 1565 ps->ps_destroy_msg(pm); 1566 1567 /* 1568 * If unimplemented, start over with emulation 1569 */ 1570 if (error == ENOSYS) { 1571 ps->ps_flags |= PS_NO_ACCESS; 1572 return perfuse_node_access(pu, opc, mode, pcr); 1573 } 1574 1575 return error; 1576 } 1577 1578 int 1579 perfuse_node_getattr(struct puffs_usermount *pu, puffs_cookie_t opc, 1580 struct vattr *vap, const struct puffs_cred *pcr) 1581 { 1582 return perfuse_node_getattr_ttl(pu, opc, vap, pcr, NULL); 1583 } 1584 1585 int 1586 perfuse_node_getattr_ttl(struct puffs_usermount *pu, puffs_cookie_t opc, 1587 struct vattr *vap, const struct puffs_cred *pcr, 1588 struct timespec *va_ttl) 1589 { 1590 perfuse_msg_t *pm = NULL; 1591 struct perfuse_state *ps; 1592 struct perfuse_node_data *pnd = PERFUSE_NODE_DATA(opc); 1593 struct fuse_getattr_in *fgi; 1594 struct fuse_attr_out *fao; 1595 int error = 0; 1596 1597 if (pnd->pnd_flags & PND_REMOVED) 1598 return ENOENT; 1599 1600 /* 1601 * Serialize size access, see comment in perfuse_node_setattr(). 1602 */ 1603 while (pnd->pnd_flags & PND_INRESIZE) 1604 requeue_request(pu, opc, PCQ_RESIZE); 1605 pnd->pnd_flags |= PND_INRESIZE; 1606 1607 ps = puffs_getspecific(pu); 1608 1609 #ifndef PUFFS_KFLAG_CACHE_FS_TTL 1610 /* 1611 * Check for cached attributes 1612 * This still require serialized access to size. 1613 */ 1614 if (!attr_expired(opc)) { 1615 (void)memcpy(vap, puffs_pn_getvap((struct puffs_node *)opc), 1616 sizeof(*vap)); 1617 goto out; 1618 } 1619 #endif /* PUFFS_KFLAG_CACHE_FS_TTL */ 1620 1621 /* 1622 * FUSE_GETATTR_FH must be set in fgi->flags 1623 * if we use for fgi->fh 1624 */ 1625 pm = ps->ps_new_msg(pu, opc, FUSE_GETATTR, sizeof(*fgi), pcr); 1626 fgi = GET_INPAYLOAD(ps, pm, fuse_getattr_in); 1627 fgi->getattr_flags = 0; 1628 fgi->dummy = 0; 1629 fgi->fh = 0; 1630 1631 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_OPEN) { 1632 fgi->fh = perfuse_get_fh(opc, FREAD); 1633 fgi->getattr_flags |= FUSE_GETATTR_FH; 1634 } 1635 1636 #ifdef PERFUSE_DEBUG 1637 if (perfuse_diagflags & PDF_RESIZE) 1638 DPRINTF(">> %s %p %" PRIu64 "\n", __func__, (void *)opc, 1639 vap->va_size); 1640 #endif 1641 1642 if ((error = xchg_msg(pu, opc, pm, sizeof(*fao), wait_reply)) != 0) 1643 goto out; 1644 1645 fao = GET_OUTPAYLOAD(ps, pm, fuse_attr_out); 1646 1647 #ifdef PERFUSE_DEBUG 1648 if (perfuse_diagflags & PDF_RESIZE) 1649 DPRINTF("<< %s %p %" PRIu64 " -> %" PRIu64 "\n", __func__, 1650 (void *)opc, vap->va_size, fao->attr.size); 1651 #endif 1652 1653 /* 1654 * We set birthtime, flags, filerev,vaflags to 0. 1655 * This seems the best bet, since the information is 1656 * not available from filesystem. 1657 */ 1658 fuse_attr_to_vap(ps, vap, &fao->attr); 1659 1660 #ifdef PUFFS_KFLAG_CACHE_FS_TTL 1661 if (va_ttl != NULL) { 1662 va_ttl->tv_sec = fao->attr_valid; 1663 va_ttl->tv_nsec = fao->attr_valid_nsec; 1664 } 1665 #else /* PUFFS_KFLAG_CACHE_FS_TTL */ 1666 set_expire(opc, NULL, fao); 1667 #endif /* PUFFS_KFLAG_CACHE_FS_TTL */ 1668 1669 ps->ps_destroy_msg(pm); 1670 out: 1671 1672 pnd->pnd_flags &= ~PND_INRESIZE; 1673 (void)dequeue_requests(ps, opc, PCQ_RESIZE, DEQUEUE_ALL); 1674 1675 return error; 1676 } 1677 1678 int 1679 perfuse_node_setattr(struct puffs_usermount *pu, puffs_cookie_t opc, 1680 const struct vattr *vap, const struct puffs_cred *pcr) 1681 { 1682 return perfuse_node_setattr_ttl(pu, opc, 1683 __UNCONST(vap), pcr, NULL); 1684 } 1685 1686 int 1687 perfuse_node_setattr_ttl(struct puffs_usermount *pu, puffs_cookie_t opc, 1688 struct vattr *vap, const struct puffs_cred *pcr, 1689 struct timespec *va_ttl) 1690 { 1691 perfuse_msg_t *pm; 1692 uint64_t fh; 1693 struct perfuse_state *ps; 1694 struct perfuse_node_data *pnd; 1695 struct fuse_setattr_in *fsi; 1696 struct fuse_attr_out *fao; 1697 struct vattr *old_va; 1698 int error; 1699 #ifdef PERFUSE_DEBUG 1700 struct vattr *old_vap; 1701 int resize_debug = 0; 1702 #endif 1703 1704 ps = puffs_getspecific(pu); 1705 pnd = PERFUSE_NODE_DATA(opc); 1706 1707 /* 1708 * The only operation we can do once the file is removed 1709 * is to resize it, and we can do it only if it is open. 1710 * Do not even send the operation to the filesystem: the 1711 * file is not there anymore. 1712 */ 1713 if (pnd->pnd_flags & PND_REMOVED) { 1714 if (!(pnd->pnd_flags & PND_OPEN)) 1715 return ENOENT; 1716 1717 error = 0; 1718 goto out; 1719 } 1720 1721 old_va = puffs_pn_getvap((struct puffs_node *)opc); 1722 1723 /* 1724 * Check for permission to change size 1725 */ 1726 if ((vap->va_size != (u_quad_t)PUFFS_VNOVAL) && 1727 (error = mode_access(opc, pcr, PUFFS_VWRITE)) != 0) 1728 return error; 1729 1730 /* 1731 * Check for permission to change dates 1732 */ 1733 if (((vap->va_atime.tv_sec != (time_t)PUFFS_VNOVAL) || 1734 (vap->va_mtime.tv_sec != (time_t)PUFFS_VNOVAL)) && 1735 (puffs_access_times(old_va->va_uid, old_va->va_gid, 1736 old_va->va_mode, 0, pcr) != 0)) 1737 return EACCES; 1738 1739 /* 1740 * Check for permission to change owner and group 1741 */ 1742 if (((vap->va_uid != (uid_t)PUFFS_VNOVAL) || 1743 (vap->va_gid != (gid_t)PUFFS_VNOVAL)) && 1744 (puffs_access_chown(old_va->va_uid, old_va->va_gid, 1745 vap->va_uid, vap->va_gid, pcr)) != 0) 1746 return EACCES; 1747 1748 /* 1749 * Check for permission to change permissions 1750 */ 1751 if ((vap->va_mode != (mode_t)PUFFS_VNOVAL) && 1752 (puffs_access_chmod(old_va->va_uid, old_va->va_gid, 1753 old_va->va_type, vap->va_mode, pcr)) != 0) 1754 return EACCES; 1755 1756 pm = ps->ps_new_msg(pu, opc, FUSE_SETATTR, sizeof(*fsi), pcr); 1757 fsi = GET_INPAYLOAD(ps, pm, fuse_setattr_in); 1758 fsi->valid = 0; 1759 1760 /* 1761 * Get a fh if the node is open for writing 1762 */ 1763 if (pnd->pnd_flags & PND_WFH) { 1764 fh = perfuse_get_fh(opc, FWRITE); 1765 fsi->fh = fh; 1766 fsi->valid |= FUSE_FATTR_FH; 1767 } 1768 1769 if (vap->va_size != (u_quad_t)PUFFS_VNOVAL) { 1770 fsi->size = vap->va_size; 1771 fsi->valid |= FUSE_FATTR_SIZE; 1772 1773 /* 1774 * Serialize anything that can touch file size 1775 * to avoid reordered GETATTR and SETATTR. 1776 * Out of order SETATTR can report stale size, 1777 * which will cause the kernel to truncate the file. 1778 * XXX Probably useless now we have a lock on GETATTR 1779 */ 1780 while (pnd->pnd_flags & PND_INRESIZE) 1781 requeue_request(pu, opc, PCQ_RESIZE); 1782 pnd->pnd_flags |= PND_INRESIZE; 1783 } 1784 1785 /* 1786 * Setting mtime without atime or vice versa leads to 1787 * dates being reset to Epoch on glusterfs. If one 1788 * is missing, use the old value. 1789 */ 1790 if ((vap->va_mtime.tv_sec != (time_t)PUFFS_VNOVAL) || 1791 (vap->va_atime.tv_sec != (time_t)PUFFS_VNOVAL)) { 1792 1793 if (vap->va_atime.tv_sec != (time_t)PUFFS_VNOVAL) { 1794 fsi->atime = vap->va_atime.tv_sec; 1795 fsi->atimensec = (uint32_t)vap->va_atime.tv_nsec; 1796 } else { 1797 fsi->atime = old_va->va_atime.tv_sec; 1798 fsi->atimensec = (uint32_t)old_va->va_atime.tv_nsec; 1799 } 1800 1801 if (vap->va_mtime.tv_sec != (time_t)PUFFS_VNOVAL) { 1802 fsi->mtime = vap->va_mtime.tv_sec; 1803 fsi->mtimensec = (uint32_t)vap->va_mtime.tv_nsec; 1804 } else { 1805 fsi->mtime = old_va->va_mtime.tv_sec; 1806 fsi->mtimensec = (uint32_t)old_va->va_mtime.tv_nsec; 1807 } 1808 1809 fsi->valid |= (FUSE_FATTR_MTIME|FUSE_FATTR_ATIME); 1810 } 1811 1812 if (vap->va_mode != (mode_t)PUFFS_VNOVAL) { 1813 fsi->mode = vap->va_mode; 1814 fsi->valid |= FUSE_FATTR_MODE; 1815 } 1816 1817 if (vap->va_uid != (uid_t)PUFFS_VNOVAL) { 1818 fsi->uid = vap->va_uid; 1819 fsi->valid |= FUSE_FATTR_UID; 1820 } 1821 1822 if (vap->va_gid != (gid_t)PUFFS_VNOVAL) { 1823 fsi->gid = vap->va_gid; 1824 fsi->valid |= FUSE_FATTR_GID; 1825 } 1826 1827 if (pnd->pnd_lock_owner != 0) { 1828 fsi->lock_owner = pnd->pnd_lock_owner; 1829 fsi->valid |= FUSE_FATTR_LOCKOWNER; 1830 } 1831 1832 /* 1833 * ftruncate() sends only va_size, and metadata cache 1834 * flush adds va_atime and va_mtime. Some FUSE 1835 * filesystems will attempt to detect ftruncate by 1836 * checking for FATTR_SIZE being set without 1837 * FATTR_UID|FATTR_GID|FATTR_ATIME|FATTR_MTIME|FATTR_MODE 1838 * 1839 * Try to adapt and remove FATTR_ATIME|FATTR_MTIME 1840 * if we suspect a ftruncate(). 1841 */ 1842 if ((vap->va_size != (u_quad_t)PUFFS_VNOVAL) && 1843 ((vap->va_mode == (mode_t)PUFFS_VNOVAL) && 1844 (vap->va_uid == (uid_t)PUFFS_VNOVAL) && 1845 (vap->va_gid == (gid_t)PUFFS_VNOVAL))) { 1846 fsi->atime = 0; 1847 fsi->atimensec = 0; 1848 fsi->mtime = 0; 1849 fsi->mtimensec = 0; 1850 fsi->valid &= ~(FUSE_FATTR_ATIME|FUSE_FATTR_MTIME); 1851 } 1852 1853 /* 1854 * There is the same mess with fchmod() 1855 */ 1856 if ((vap->va_mode != (mode_t)PUFFS_VNOVAL) && 1857 (vap->va_uid == (uid_t)PUFFS_VNOVAL) && 1858 (vap->va_gid == (gid_t)PUFFS_VNOVAL)) { 1859 fsi->atime = 0; 1860 fsi->atimensec = 0; 1861 fsi->mtime = 0; 1862 fsi->mtimensec = 0; 1863 fsi->valid &= ~(FUSE_FATTR_ATIME|FUSE_FATTR_MTIME); 1864 } 1865 1866 /* 1867 * If nothing remain, discard the operation. 1868 */ 1869 if (!(fsi->valid & (FUSE_FATTR_SIZE|FUSE_FATTR_ATIME|FUSE_FATTR_MTIME| 1870 FUSE_FATTR_MODE|FUSE_FATTR_UID|FUSE_FATTR_GID))) { 1871 error = 0; 1872 goto out; 1873 } 1874 1875 #ifdef PERFUSE_DEBUG 1876 old_vap = puffs_pn_getvap((struct puffs_node *)opc); 1877 1878 if ((perfuse_diagflags & PDF_RESIZE) && 1879 (old_vap->va_size != (u_quad_t)PUFFS_VNOVAL)) { 1880 resize_debug = 1; 1881 1882 DPRINTF(">> %s %p %" PRIu64 " -> %" PRIu64 "\n", __func__, 1883 (void *)opc, 1884 puffs_pn_getvap((struct puffs_node *)opc)->va_size, 1885 fsi->size); 1886 } 1887 #endif 1888 1889 if ((error = xchg_msg(pu, opc, pm, sizeof(*fao), wait_reply)) != 0) 1890 goto out; 1891 1892 /* 1893 * Copy back the new values 1894 */ 1895 fao = GET_OUTPAYLOAD(ps, pm, fuse_attr_out); 1896 1897 #ifdef PERFUSE_DEBUG 1898 if (resize_debug) 1899 DPRINTF("<< %s %p %" PRIu64 " -> %" PRIu64 "\n", __func__, 1900 (void *)opc, old_vap->va_size, fao->attr.size); 1901 #endif 1902 1903 fuse_attr_to_vap(ps, old_va, &fao->attr); 1904 1905 #ifdef PUFFS_KFLAG_CACHE_FS_TTL 1906 if (va_ttl != NULL) { 1907 va_ttl->tv_sec = fao->attr_valid; 1908 va_ttl->tv_nsec = fao->attr_valid_nsec; 1909 (void)memcpy(vap, old_va, sizeof(*vap)); 1910 } 1911 #else /* PUFFS_KFLAG_CACHE_FS_TTL */ 1912 set_expire(opc, NULL, fao); 1913 #endif /* PUFFS_KFLAG_CACHE_FS_TTL */ 1914 1915 ps->ps_destroy_msg(pm); 1916 1917 out: 1918 if (pnd->pnd_flags & PND_INRESIZE) { 1919 pnd->pnd_flags &= ~PND_INRESIZE; 1920 (void)dequeue_requests(ps, opc, PCQ_RESIZE, DEQUEUE_ALL); 1921 } 1922 1923 return error; 1924 } 1925 1926 int 1927 perfuse_node_poll(struct puffs_usermount *pu, puffs_cookie_t opc, int *events) 1928 { 1929 struct perfuse_state *ps; 1930 perfuse_msg_t *pm; 1931 struct fuse_poll_in *fpi; 1932 struct fuse_poll_out *fpo; 1933 int error; 1934 1935 ps = puffs_getspecific(pu); 1936 /* 1937 * kh is set if FUSE_POLL_SCHEDULE_NOTIFY is set. 1938 * 1939 * XXX ps_new_msg() is called with NULL creds, which will 1940 * be interpreted as FUSE superuser. We have no way to 1941 * know the requesting process' credential, but since poll 1942 * is supposed to operate on a file that has been open, 1943 * permission should have already been checked at open time. 1944 * That still may breaks on filesystems that provides odd 1945 * semantics. 1946 */ 1947 pm = ps->ps_new_msg(pu, opc, FUSE_POLL, sizeof(*fpi), NULL); 1948 fpi = GET_INPAYLOAD(ps, pm, fuse_poll_in); 1949 fpi->fh = perfuse_get_fh(opc, FREAD); 1950 fpi->kh = 0; 1951 fpi->flags = 0; 1952 1953 #ifdef PERFUSE_DEBUG 1954 if (perfuse_diagflags & PDF_FH) 1955 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", " 1956 "fh = 0x%"PRIx64"\n", __func__, (void *)opc, 1957 PERFUSE_NODE_DATA(opc)->pnd_nodeid, fpi->fh); 1958 #endif 1959 if ((error = xchg_msg(pu, opc, pm, sizeof(*fpo), wait_reply)) != 0) 1960 return error; 1961 1962 fpo = GET_OUTPAYLOAD(ps, pm, fuse_poll_out); 1963 *events = fpo->revents; 1964 1965 ps->ps_destroy_msg(pm); 1966 1967 return 0; 1968 } 1969 1970 /* ARGSUSED0 */ 1971 int 1972 perfuse_node_mmap(struct puffs_usermount *pu, puffs_cookie_t opc, int flags, 1973 const struct puffs_cred *pcr) 1974 { 1975 /* 1976 * Not implemented anymore in libfuse 1977 */ 1978 return ENOSYS; 1979 } 1980 1981 /* ARGSUSED2 */ 1982 int 1983 perfuse_node_fsync(struct puffs_usermount *pu, puffs_cookie_t opc, 1984 const struct puffs_cred *pcr, int flags, off_t offlo, off_t offhi) 1985 { 1986 int op; 1987 perfuse_msg_t *pm; 1988 struct perfuse_state *ps; 1989 struct perfuse_node_data *pnd; 1990 struct fuse_fsync_in *ffi; 1991 uint64_t fh; 1992 int error; 1993 1994 pm = NULL; 1995 ps = puffs_getspecific(pu); 1996 pnd = PERFUSE_NODE_DATA(opc); 1997 1998 /* 1999 * No need to sync a removed node 2000 */ 2001 if (pnd->pnd_flags & PND_REMOVED) 2002 return 0; 2003 2004 /* 2005 * We do not sync closed files. They have been 2006 * sync at inactive time already. 2007 */ 2008 if (!(pnd->pnd_flags & PND_OPEN)) 2009 return 0; 2010 2011 if (puffs_pn_getvap((struct puffs_node *)opc)->va_type == VDIR) 2012 op = FUSE_FSYNCDIR; 2013 else /* VREG but also other types such as VLNK */ 2014 op = FUSE_FSYNC; 2015 2016 /* 2017 * Do not sync if there are no change to sync 2018 * XXX remove that test on files if we implement mmap 2019 */ 2020 #ifdef PERFUSE_DEBUG 2021 if (perfuse_diagflags & PDF_SYNC) 2022 DPRINTF("%s: TEST opc = %p, file = \"%s\" is %sdirty\n", 2023 __func__, (void*)opc, perfuse_node_path(opc), 2024 pnd->pnd_flags & PND_DIRTY ? "" : "not "); 2025 #endif 2026 if (!(pnd->pnd_flags & PND_DIRTY)) 2027 return 0; 2028 2029 /* 2030 * It seems NetBSD can call fsync without open first 2031 * glusterfs complain in such a situation: 2032 * "FSYNC() ERR => -1 (Invalid argument)" 2033 * The file will be closed at inactive time. 2034 * 2035 * We open the directory for reading in order to sync. 2036 * This sounds rather counterintuitive, but it works. 2037 */ 2038 if (!(pnd->pnd_flags & PND_WFH)) { 2039 if ((error = perfuse_node_open(pu, opc, FREAD, pcr)) != 0) 2040 goto out; 2041 } 2042 2043 if (op == FUSE_FSYNCDIR) 2044 fh = perfuse_get_fh(opc, FREAD); 2045 else 2046 fh = perfuse_get_fh(opc, FWRITE); 2047 2048 /* 2049 * If fsync_flags is set, meta data should not be flushed. 2050 */ 2051 pm = ps->ps_new_msg(pu, opc, op, sizeof(*ffi), pcr); 2052 ffi = GET_INPAYLOAD(ps, pm, fuse_fsync_in); 2053 ffi->fh = fh; 2054 ffi->fsync_flags = (flags & FFILESYNC) ? 0 : 1; 2055 2056 #ifdef PERFUSE_DEBUG 2057 if (perfuse_diagflags & PDF_FH) 2058 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", fh = 0x%"PRIx64"\n", 2059 __func__, (void *)opc, 2060 PERFUSE_NODE_DATA(opc)->pnd_nodeid, ffi->fh); 2061 #endif 2062 2063 if ((error = xchg_msg(pu, opc, pm, 2064 NO_PAYLOAD_REPLY_LEN, wait_reply)) != 0) 2065 goto out; 2066 2067 /* 2068 * No reply beyond fuse_out_header: nothing to do on success 2069 * just clear the dirty flag 2070 */ 2071 pnd->pnd_flags &= ~PND_DIRTY; 2072 2073 #ifdef PERFUSE_DEBUG 2074 if (perfuse_diagflags & PDF_SYNC) 2075 DPRINTF("%s: CLEAR opc = %p, file = \"%s\"\n", 2076 __func__, (void*)opc, perfuse_node_path(opc)); 2077 #endif 2078 2079 ps->ps_destroy_msg(pm); 2080 2081 out: 2082 /* 2083 * ENOSYS is not returned to kernel, 2084 */ 2085 if (error == ENOSYS) 2086 error = 0; 2087 2088 return error; 2089 } 2090 2091 /* ARGSUSED0 */ 2092 int 2093 perfuse_node_seek(struct puffs_usermount *pu, puffs_cookie_t opc, 2094 off_t oldoff, off_t newoff, const struct puffs_cred *pcr) 2095 { 2096 return 0; 2097 } 2098 2099 int 2100 perfuse_node_remove(struct puffs_usermount *pu, puffs_cookie_t opc, 2101 puffs_cookie_t targ, const struct puffs_cn *pcn) 2102 { 2103 struct perfuse_state *ps; 2104 struct perfuse_node_data *pnd; 2105 perfuse_msg_t *pm; 2106 char *path; 2107 const char *name; 2108 size_t len; 2109 int error; 2110 2111 pnd = PERFUSE_NODE_DATA(opc); 2112 2113 if ((pnd->pnd_flags & PND_REMOVED) || 2114 (PERFUSE_NODE_DATA(targ)->pnd_flags & PND_REMOVED)) 2115 return ENOENT; 2116 2117 #ifdef PERFUSE_DEBUG 2118 if (targ == NULL) 2119 DERRX(EX_SOFTWARE, "%s: targ is NULL", __func__); 2120 2121 if (perfuse_diagflags & (PDF_FH|PDF_FILENAME)) 2122 DPRINTF("%s: opc = %p, remove opc = %p, file = \"%s\"\n", 2123 __func__, (void *)opc, (void *)targ, pcn->pcn_name); 2124 #endif 2125 /* 2126 * Await for all operations on the deleted node to drain, 2127 * as the filesystem may be confused to have it deleted 2128 * during a getattr 2129 */ 2130 while (PERFUSE_NODE_DATA(targ)->pnd_flags & PND_INXCHG) 2131 requeue_request(pu, targ, PCQ_AFTERXCHG); 2132 2133 ps = puffs_getspecific(pu); 2134 pnd = PERFUSE_NODE_DATA(opc); 2135 name = pcn->pcn_name; 2136 len = pcn->pcn_namelen + 1; 2137 2138 pm = ps->ps_new_msg(pu, opc, FUSE_UNLINK, len, pcn->pcn_cred); 2139 path = _GET_INPAYLOAD(ps, pm, char *); 2140 (void)strlcpy(path, name, len); 2141 2142 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 2143 return error; 2144 2145 PERFUSE_NODE_DATA(targ)->pnd_flags |= PND_REMOVED; 2146 if (!(PERFUSE_NODE_DATA(targ)->pnd_flags & PND_OPEN)) 2147 puffs_setback(puffs_cc_getcc(pu), PUFFS_SETBACK_NOREF_N2); 2148 2149 /* 2150 * The parent directory needs a sync 2151 */ 2152 PERFUSE_NODE_DATA(opc)->pnd_flags |= PND_DIRTY; 2153 2154 #ifdef PERFUSE_DEBUG 2155 if (perfuse_diagflags & PDF_FILENAME) 2156 DPRINTF("%s: remove nodeid = 0x%"PRIx64" file = \"%s\"\n", 2157 __func__, PERFUSE_NODE_DATA(targ)->pnd_nodeid, 2158 pcn->pcn_name); 2159 #endif 2160 ps->ps_destroy_msg(pm); 2161 2162 return 0; 2163 } 2164 2165 int 2166 perfuse_node_link(struct puffs_usermount *pu, puffs_cookie_t opc, 2167 puffs_cookie_t targ, const struct puffs_cn *pcn) 2168 { 2169 struct perfuse_state *ps; 2170 perfuse_msg_t *pm; 2171 const char *name; 2172 size_t len; 2173 struct puffs_node *pn; 2174 struct fuse_link_in *fli; 2175 int error; 2176 2177 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 2178 return ENOENT; 2179 2180 ps = puffs_getspecific(pu); 2181 pn = (struct puffs_node *)targ; 2182 name = pcn->pcn_name; 2183 len = sizeof(*fli) + pcn->pcn_namelen + 1; 2184 2185 pm = ps->ps_new_msg(pu, opc, FUSE_LINK, len, pcn->pcn_cred); 2186 fli = GET_INPAYLOAD(ps, pm, fuse_link_in); 2187 fli->oldnodeid = PERFUSE_NODE_DATA(pn)->pnd_nodeid; 2188 (void)strlcpy((char *)(void *)(fli + 1), name, len - sizeof(*fli)); 2189 2190 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 2191 return error; 2192 2193 ps->ps_destroy_msg(pm); 2194 2195 return 0; 2196 } 2197 2198 int 2199 perfuse_node_rename(struct puffs_usermount *pu, puffs_cookie_t opc, 2200 puffs_cookie_t src, const struct puffs_cn *pcn_src, 2201 puffs_cookie_t targ_dir, puffs_cookie_t targ, 2202 const struct puffs_cn *pcn_targ) 2203 { 2204 struct perfuse_state *ps; 2205 perfuse_msg_t *pm; 2206 struct fuse_rename_in *fri; 2207 const char *newname; 2208 const char *oldname; 2209 char *np; 2210 int error; 2211 size_t len; 2212 size_t newname_len; 2213 size_t oldname_len; 2214 2215 if ((PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) || 2216 (PERFUSE_NODE_DATA(src)->pnd_flags & PND_REMOVED) || 2217 (PERFUSE_NODE_DATA(targ_dir)->pnd_flags & PND_REMOVED)) 2218 return ENOENT; 2219 2220 /* 2221 * Await for all operations on the deleted node to drain, 2222 * as the filesystem may be confused to have it deleted 2223 * during a getattr 2224 */ 2225 if ((struct puffs_node *)targ != NULL) { 2226 while (PERFUSE_NODE_DATA(targ)->pnd_flags & PND_INXCHG) 2227 requeue_request(pu, targ, PCQ_AFTERXCHG); 2228 } else { 2229 while (PERFUSE_NODE_DATA(src)->pnd_flags & PND_INXCHG) 2230 requeue_request(pu, src, PCQ_AFTERXCHG); 2231 } 2232 2233 ps = puffs_getspecific(pu); 2234 newname = pcn_targ->pcn_name; 2235 newname_len = pcn_targ->pcn_namelen + 1; 2236 oldname = pcn_src->pcn_name; 2237 oldname_len = pcn_src->pcn_namelen + 1; 2238 2239 len = sizeof(*fri) + oldname_len + newname_len; 2240 pm = ps->ps_new_msg(pu, opc, FUSE_RENAME, len, pcn_targ->pcn_cred); 2241 fri = GET_INPAYLOAD(ps, pm, fuse_rename_in); 2242 fri->newdir = PERFUSE_NODE_DATA(targ_dir)->pnd_nodeid; 2243 np = (char *)(void *)(fri + 1); 2244 (void)strlcpy(np, oldname, oldname_len); 2245 np += oldname_len; 2246 (void)strlcpy(np, newname, newname_len); 2247 2248 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 2249 return error; 2250 2251 if (opc != targ_dir) { 2252 struct perfuse_node_data *srcdir_pnd; 2253 struct perfuse_node_data *dstdir_pnd; 2254 struct perfuse_node_data *src_pnd; 2255 2256 srcdir_pnd = PERFUSE_NODE_DATA(opc); 2257 dstdir_pnd = PERFUSE_NODE_DATA(targ_dir); 2258 src_pnd = PERFUSE_NODE_DATA(src); 2259 2260 TAILQ_REMOVE(&srcdir_pnd->pnd_children, src_pnd, pnd_next); 2261 TAILQ_INSERT_TAIL(&dstdir_pnd->pnd_children, src_pnd, pnd_next); 2262 2263 srcdir_pnd->pnd_childcount--; 2264 dstdir_pnd->pnd_childcount++; 2265 2266 src_pnd->pnd_parent = targ_dir; 2267 2268 PERFUSE_NODE_DATA(targ_dir)->pnd_flags |= PND_DIRTY; 2269 } 2270 2271 (void)strlcpy(PERFUSE_NODE_DATA(src)->pnd_name, newname, MAXPATHLEN); 2272 2273 PERFUSE_NODE_DATA(opc)->pnd_flags |= PND_DIRTY; 2274 2275 if ((struct puffs_node *)targ != NULL) 2276 PERFUSE_NODE_DATA(targ)->pnd_flags |= PND_REMOVED; 2277 2278 #ifdef PERFUSE_DEBUG 2279 if (perfuse_diagflags & PDF_FILENAME) 2280 DPRINTF("%s: nodeid = 0x%"PRIx64" file = \"%s\" renamed \"%s\" " 2281 "nodeid = 0x%"PRIx64" -> nodeid = 0x%"PRIx64" \"%s\"\n", 2282 __func__, PERFUSE_NODE_DATA(src)->pnd_nodeid, 2283 pcn_src->pcn_name, pcn_targ->pcn_name, 2284 PERFUSE_NODE_DATA(opc)->pnd_nodeid, 2285 PERFUSE_NODE_DATA(targ_dir)->pnd_nodeid, 2286 perfuse_node_path(targ_dir)); 2287 #endif 2288 2289 ps->ps_destroy_msg(pm); 2290 2291 return 0; 2292 } 2293 2294 int 2295 perfuse_node_mkdir(struct puffs_usermount *pu, puffs_cookie_t opc, 2296 struct puffs_newinfo *pni, const struct puffs_cn *pcn, 2297 const struct vattr *vap) 2298 { 2299 struct perfuse_state *ps; 2300 perfuse_msg_t *pm; 2301 struct fuse_mkdir_in *fmi; 2302 const char *path; 2303 size_t len; 2304 2305 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 2306 return ENOENT; 2307 2308 ps = puffs_getspecific(pu); 2309 path = pcn->pcn_name; 2310 len = sizeof(*fmi) + pcn->pcn_namelen + 1; 2311 2312 pm = ps->ps_new_msg(pu, opc, FUSE_MKDIR, len, pcn->pcn_cred); 2313 fmi = GET_INPAYLOAD(ps, pm, fuse_mkdir_in); 2314 fmi->mode = vap->va_mode; 2315 fmi->umask = 0; /* Seems unused by libfuse? */ 2316 (void)strlcpy((char *)(void *)(fmi + 1), path, len - sizeof(*fmi)); 2317 2318 return node_mk_common(pu, opc, pni, pcn, pm); 2319 } 2320 2321 2322 int 2323 perfuse_node_rmdir(struct puffs_usermount *pu, puffs_cookie_t opc, 2324 puffs_cookie_t targ, const struct puffs_cn *pcn) 2325 { 2326 struct perfuse_state *ps; 2327 struct perfuse_node_data *pnd; 2328 perfuse_msg_t *pm; 2329 char *path; 2330 const char *name; 2331 size_t len; 2332 int error; 2333 2334 pnd = PERFUSE_NODE_DATA(opc); 2335 2336 if ((pnd->pnd_flags & PND_REMOVED) || 2337 (PERFUSE_NODE_DATA(targ)->pnd_flags & PND_REMOVED)) 2338 return ENOENT; 2339 2340 /* 2341 * Await for all operations on the deleted node to drain, 2342 * as the filesystem may be confused to have it deleted 2343 * during a getattr 2344 */ 2345 while (PERFUSE_NODE_DATA(targ)->pnd_flags & PND_INXCHG) 2346 requeue_request(pu, targ, PCQ_AFTERXCHG); 2347 2348 ps = puffs_getspecific(pu); 2349 name = pcn->pcn_name; 2350 len = pcn->pcn_namelen + 1; 2351 2352 pm = ps->ps_new_msg(pu, opc, FUSE_RMDIR, len, pcn->pcn_cred); 2353 path = _GET_INPAYLOAD(ps, pm, char *); 2354 (void)strlcpy(path, name, len); 2355 2356 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 2357 return error; 2358 2359 PERFUSE_NODE_DATA(targ)->pnd_flags |= PND_REMOVED; 2360 if (!(PERFUSE_NODE_DATA(targ)->pnd_flags & PND_OPEN)) 2361 puffs_setback(puffs_cc_getcc(pu), PUFFS_SETBACK_NOREF_N2); 2362 2363 /* 2364 * The parent directory needs a sync 2365 */ 2366 PERFUSE_NODE_DATA(opc)->pnd_flags |= PND_DIRTY; 2367 2368 #ifdef PERFUSE_DEBUG 2369 if (perfuse_diagflags & PDF_FILENAME) 2370 DPRINTF("%s: remove nodeid = 0x%"PRIx64" file = \"%s\"\n", 2371 __func__, PERFUSE_NODE_DATA(targ)->pnd_nodeid, 2372 perfuse_node_path(targ)); 2373 #endif 2374 ps->ps_destroy_msg(pm); 2375 2376 return 0; 2377 } 2378 2379 /* vap is unused */ 2380 /* ARGSUSED4 */ 2381 int 2382 perfuse_node_symlink(struct puffs_usermount *pu, puffs_cookie_t opc, 2383 struct puffs_newinfo *pni, const struct puffs_cn *pcn_src, 2384 const struct vattr *vap, const char *link_target) 2385 { 2386 struct perfuse_state *ps; 2387 perfuse_msg_t *pm; 2388 char *np; 2389 const char *path; 2390 size_t path_len; 2391 size_t linkname_len; 2392 size_t len; 2393 2394 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 2395 return ENOENT; 2396 2397 ps = puffs_getspecific(pu); 2398 path = pcn_src->pcn_name; 2399 path_len = pcn_src->pcn_namelen + 1; 2400 linkname_len = strlen(link_target) + 1; 2401 len = path_len + linkname_len; 2402 2403 pm = ps->ps_new_msg(pu, opc, FUSE_SYMLINK, len, pcn_src->pcn_cred); 2404 np = _GET_INPAYLOAD(ps, pm, char *); 2405 (void)strlcpy(np, path, path_len); 2406 np += path_len; 2407 (void)strlcpy(np, link_target, linkname_len); 2408 2409 return node_mk_common(pu, opc, pni, pcn_src, pm); 2410 } 2411 2412 /* ARGSUSED4 */ 2413 int 2414 perfuse_node_readdir(struct puffs_usermount *pu, puffs_cookie_t opc, 2415 struct dirent *dent, off_t *readoff, size_t *reslen, 2416 const struct puffs_cred *pcr, int *eofflag, off_t *cookies, 2417 size_t *ncookies) 2418 { 2419 perfuse_msg_t *pm; 2420 uint64_t fh; 2421 struct perfuse_state *ps; 2422 struct perfuse_node_data *pnd; 2423 struct fuse_read_in *fri; 2424 struct fuse_out_header *foh; 2425 struct fuse_dirent *fd; 2426 size_t foh_len; 2427 int error; 2428 size_t fd_maxlen; 2429 2430 error = 0; 2431 ps = puffs_getspecific(pu); 2432 2433 /* 2434 * readdir state is kept at node level, and several readdir 2435 * requests can be issued at the same time on the same node. 2436 * We need to queue requests so that only one is in readdir 2437 * code at the same time. 2438 */ 2439 pnd = PERFUSE_NODE_DATA(opc); 2440 while (pnd->pnd_flags & PND_INREADDIR) 2441 requeue_request(pu, opc, PCQ_READDIR); 2442 pnd->pnd_flags |= PND_INREADDIR; 2443 2444 #ifdef PERFUSE_DEBUG 2445 if (perfuse_diagflags & PDF_READDIR) 2446 DPRINTF("%s: READDIR opc = %p enter critical section\n", 2447 __func__, (void *)opc); 2448 #endif 2449 /* 2450 * Re-initialize pnd->pnd_fd_cookie on the first readdir for a node 2451 */ 2452 if (*readoff == 0) 2453 pnd->pnd_fd_cookie = 0; 2454 2455 /* 2456 * Do we already have the data bufered? 2457 */ 2458 if (pnd->pnd_dirent != NULL) 2459 goto out; 2460 pnd->pnd_dirent_len = 0; 2461 2462 /* 2463 * It seems NetBSD can call readdir without open first 2464 * libfuse will crash if it is done that way, hence open first. 2465 */ 2466 if (!(pnd->pnd_flags & PND_OPEN)) { 2467 if ((error = perfuse_node_open(pu, opc, FREAD, pcr)) != 0) 2468 goto out; 2469 } 2470 2471 fh = perfuse_get_fh(opc, FREAD); 2472 2473 #ifdef PERFUSE_DEBUG 2474 if (perfuse_diagflags & PDF_FH) 2475 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", " 2476 "rfh = 0x%"PRIx64"\n", __func__, (void *)opc, 2477 PERFUSE_NODE_DATA(opc)->pnd_nodeid, fh); 2478 #endif 2479 2480 pnd->pnd_all_fd = NULL; 2481 pnd->pnd_all_fd_len = 0; 2482 fd_maxlen = ps->ps_max_readahead - sizeof(*foh); 2483 2484 do { 2485 size_t fd_len; 2486 char *afdp; 2487 2488 pm = ps->ps_new_msg(pu, opc, FUSE_READDIR, sizeof(*fri), pcr); 2489 2490 /* 2491 * read_flags, lock_owner and flags are unused in libfuse 2492 */ 2493 fri = GET_INPAYLOAD(ps, pm, fuse_read_in); 2494 fri->fh = fh; 2495 fri->offset = pnd->pnd_fd_cookie; 2496 fri->size = (uint32_t)fd_maxlen; 2497 fri->read_flags = 0; 2498 fri->lock_owner = 0; 2499 fri->flags = 0; 2500 2501 if ((error = xchg_msg(pu, opc, pm, 2502 UNSPEC_REPLY_LEN, wait_reply)) != 0) 2503 goto out; 2504 2505 /* 2506 * There are many puffs_framebufs calls later, 2507 * therefore foh will not be valid for a long time. 2508 * Just get the length and forget it. 2509 */ 2510 foh = GET_OUTHDR(ps, pm); 2511 foh_len = foh->len; 2512 2513 /* 2514 * Empty read: we reached the end of the buffer. 2515 */ 2516 if (foh_len == sizeof(*foh)) { 2517 ps->ps_destroy_msg(pm); 2518 *eofflag = 1; 2519 break; 2520 } 2521 2522 /* 2523 * Check for corrupted message. 2524 */ 2525 if (foh_len < sizeof(*foh) + sizeof(*fd)) { 2526 ps->ps_destroy_msg(pm); 2527 DWARNX("readdir reply too short"); 2528 error = EIO; 2529 goto out; 2530 } 2531 2532 2533 fd = GET_OUTPAYLOAD(ps, pm, fuse_dirent); 2534 fd_len = foh_len - sizeof(*foh); 2535 2536 pnd->pnd_all_fd = realloc(pnd->pnd_all_fd, 2537 pnd->pnd_all_fd_len + fd_len); 2538 if (pnd->pnd_all_fd == NULL) 2539 DERR(EX_OSERR, "%s: malloc failed", __func__); 2540 2541 afdp = (char *)(void *)pnd->pnd_all_fd + pnd->pnd_all_fd_len; 2542 (void)memcpy(afdp, fd, fd_len); 2543 2544 pnd->pnd_all_fd_len += fd_len; 2545 2546 /* 2547 * The fd->off field is used as a cookie for 2548 * resuming the next readdir() where this one was left. 2549 */ 2550 pnd->pnd_fd_cookie = readdir_last_cookie(fd, fd_len); 2551 2552 ps->ps_destroy_msg(pm); 2553 } while (1 /* CONSTCOND */); 2554 2555 if (pnd->pnd_all_fd != NULL) { 2556 if (fuse_to_dirent(pu, opc, pnd->pnd_all_fd, 2557 pnd->pnd_all_fd_len) == -1) 2558 error = EIO; 2559 } 2560 2561 out: 2562 if (pnd->pnd_all_fd != NULL) { 2563 free(pnd->pnd_all_fd); 2564 pnd->pnd_all_fd = NULL; 2565 pnd->pnd_all_fd_len = 0; 2566 } 2567 2568 if (error == 0) 2569 error = readdir_buffered(opc, dent, readoff, reslen); 2570 2571 /* 2572 * Schedule queued readdir requests 2573 */ 2574 pnd->pnd_flags &= ~PND_INREADDIR; 2575 (void)dequeue_requests(ps, opc, PCQ_READDIR, DEQUEUE_ALL); 2576 2577 #ifdef PERFUSE_DEBUG 2578 if (perfuse_diagflags & PDF_READDIR) 2579 DPRINTF("%s: READDIR opc = %p exit critical section\n", 2580 __func__, (void *)opc); 2581 #endif 2582 2583 return error; 2584 } 2585 2586 int 2587 perfuse_node_readlink(struct puffs_usermount *pu, puffs_cookie_t opc, 2588 const struct puffs_cred *pcr, char *linkname, size_t *linklen) 2589 { 2590 struct perfuse_state *ps; 2591 perfuse_msg_t *pm; 2592 int error; 2593 size_t len; 2594 struct fuse_out_header *foh; 2595 2596 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 2597 return ENOENT; 2598 2599 ps = puffs_getspecific(pu); 2600 2601 pm = ps->ps_new_msg(pu, opc, FUSE_READLINK, 0, pcr); 2602 2603 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 2604 return error; 2605 2606 foh = GET_OUTHDR(ps, pm); 2607 len = foh->len - sizeof(*foh); 2608 if (len > *linklen) 2609 DERRX(EX_PROTOCOL, "path len = %zd too long", len); 2610 if (len == 0) 2611 DERRX(EX_PROTOCOL, "path len = %zd too short", len); 2612 2613 /* 2614 * FUSE filesystems return a NUL terminated string, we 2615 * do not want to trailing \0 2616 */ 2617 *linklen = len - 1; 2618 (void)memcpy(linkname, _GET_OUTPAYLOAD(ps, pm, char *), len); 2619 2620 ps->ps_destroy_msg(pm); 2621 2622 return 0; 2623 } 2624 2625 int 2626 perfuse_node_reclaim(struct puffs_usermount *pu, puffs_cookie_t opc) 2627 { 2628 struct perfuse_state *ps; 2629 perfuse_msg_t *pm; 2630 struct perfuse_node_data *pnd; 2631 struct fuse_forget_in *ffi; 2632 struct puffs_node *pn; 2633 struct puffs_node *pn_root; 2634 2635 if (opc == 0) 2636 return 0; 2637 2638 ps = puffs_getspecific(pu); 2639 pnd = PERFUSE_NODE_DATA(opc); 2640 2641 /* 2642 * Never forget the root. 2643 */ 2644 if (pnd->pnd_nodeid == FUSE_ROOT_ID) 2645 return 0; 2646 2647 pnd->pnd_flags |= PND_RECLAIMED; 2648 pnd->pnd_puffs_nlookup--; 2649 2650 #ifdef PERFUSE_DEBUG 2651 if (perfuse_diagflags & PDF_RECLAIM) 2652 DPRINTF("%s (nodeid %"PRId64") reclaimed\n", 2653 perfuse_node_path(opc), pnd->pnd_nodeid); 2654 #endif 2655 2656 pn_root = puffs_getroot(pu); 2657 pn = (struct puffs_node *)opc; 2658 while (pn != pn_root) { 2659 struct puffs_node *parent_pn; 2660 2661 pnd = PERFUSE_NODE_DATA(pn); 2662 2663 #ifdef PERFUSE_DEBUG 2664 if (perfuse_diagflags & PDF_RECLAIM) 2665 DPRINTF("%s (nodeid %"PRId64") is %sreclaimed, nlookup = %d " 2666 "has childcount %d %s%s%s%s, pending ops:%s%s%s\n", 2667 perfuse_node_path((puffs_cookie_t)pn), pnd->pnd_nodeid, 2668 pnd->pnd_flags & PND_RECLAIMED ? "" : "not ", 2669 pnd->pnd_puffs_nlookup, pnd->pnd_childcount, 2670 pnd->pnd_flags & PND_OPEN ? "open " : "not open", 2671 pnd->pnd_flags & PND_RFH ? "r" : "", 2672 pnd->pnd_flags & PND_WFH ? "w" : "", 2673 pnd->pnd_flags & PND_BUSY ? "" : " none", 2674 pnd->pnd_flags & PND_INREADDIR ? " readdir" : "", 2675 pnd->pnd_flags & PND_INWRITE ? " write" : "", 2676 pnd->pnd_flags & PND_INOPEN ? " open" : ""); 2677 #endif 2678 if (!(pnd->pnd_flags & PND_RECLAIMED) || 2679 (pnd->pnd_childcount != 0)) 2680 return 0; 2681 2682 /* 2683 * lookup/reclaim activity differs whether name cache 2684 * is used or not. 2685 * - With namecache off, we get as many reclaims as lookups, 2686 * we therefore must keep track of pnd_puffs_nlookup 2687 * - With namecache on we have a single 2688 * reclaim for any amount of lookups. We therfore 2689 * ignore pnd_puffs_nlookup. On netbsd-5 there is a 2690 * bug and this behavior occurs whatever cache setting 2691 * we have. 2692 */ 2693 #if !defined(PUFFS_KFLAG_CACHE_FS_TTL) && __NetBSD_Prereq__(5,99,0) 2694 if (pnd->pnd_puffs_nlookup != 0) 2695 return 0; 2696 #endif /* !PUFFS_KFLAG_CACHE_FS_TTL && NetBSD > 5.99.0 */ 2697 2698 #ifdef PERFUSE_DEBUG 2699 if ((pnd->pnd_flags & PND_OPEN) || 2700 !TAILQ_EMPTY(&pnd->pnd_pcq)) 2701 DERRX(EX_SOFTWARE, "%s: opc = %p: still open", 2702 __func__, (void *)opc); 2703 2704 if ((pnd->pnd_flags & PND_BUSY) || 2705 !TAILQ_EMPTY(&pnd->pnd_pcq)) 2706 DERRX(EX_SOFTWARE, "%s: opc = %p: ongoing operations", 2707 __func__, (void *)opc); 2708 #endif 2709 2710 /* 2711 * Send the FORGET message 2712 * 2713 * ps_new_msg() is called with NULL creds, which will 2714 * be interpreted as FUSE superuser. This is obviously 2715 * fine since we operate with kernel creds here. 2716 */ 2717 pm = ps->ps_new_msg(pu, (puffs_cookie_t)pn, FUSE_FORGET, 2718 sizeof(*ffi), NULL); 2719 ffi = GET_INPAYLOAD(ps, pm, fuse_forget_in); 2720 ffi->nlookup = pnd->pnd_fuse_nlookup; 2721 2722 /* 2723 * No reply is expected, pm is freed in xchg_msg 2724 */ 2725 (void)xchg_msg(pu, (puffs_cookie_t)pn, 2726 pm, UNSPEC_REPLY_LEN, no_reply); 2727 2728 parent_pn = pnd->pnd_parent; 2729 2730 perfuse_destroy_pn(pn); 2731 2732 pn = parent_pn; 2733 } 2734 2735 return 0; 2736 } 2737 2738 int 2739 perfuse_node_inactive(struct puffs_usermount *pu, puffs_cookie_t opc) 2740 { 2741 struct perfuse_state *ps; 2742 struct perfuse_node_data *pnd; 2743 int error; 2744 2745 if (opc == 0) 2746 return 0; 2747 2748 ps = puffs_getspecific(pu); 2749 pnd = PERFUSE_NODE_DATA(opc); 2750 2751 if (!(pnd->pnd_flags & (PND_OPEN|PND_REMOVED))) 2752 return 0; 2753 2754 /* 2755 * Make sure all operation are finished 2756 * There can be an ongoing write. Other 2757 * operation wait for all data before 2758 * the close/inactive. 2759 */ 2760 while (pnd->pnd_flags & PND_INWRITE) 2761 requeue_request(pu, opc, PCQ_AFTERWRITE); 2762 2763 /* 2764 * The inactive operation may be cancelled, 2765 * If no open is in progress, set PND_INOPEN 2766 * so that a new open will be queued. 2767 */ 2768 if (pnd->pnd_flags & PND_INOPEN) 2769 return 0; 2770 2771 pnd->pnd_flags |= PND_INOPEN; 2772 2773 /* 2774 * Sync data 2775 */ 2776 if (pnd->pnd_flags & PND_DIRTY) { 2777 if ((error = perfuse_node_fsync(pu, opc, NULL, 0, 0, 0)) != 0) 2778 DWARN("%s: perfuse_node_fsync failed error = %d", 2779 __func__, error); 2780 } 2781 2782 2783 /* 2784 * Close handles 2785 */ 2786 if (pnd->pnd_flags & PND_WFH) { 2787 if ((error = perfuse_node_close_common(pu, opc, FWRITE)) != 0) 2788 DWARN("%s: close write FH failed error = %d", 2789 __func__, error); 2790 } 2791 2792 if (pnd->pnd_flags & PND_RFH) { 2793 if ((error = perfuse_node_close_common(pu, opc, FREAD)) != 0) 2794 DWARN("%s: close read FH failed error = %d", 2795 __func__, error); 2796 } 2797 2798 /* 2799 * This will cause a reclaim to be sent 2800 */ 2801 if (pnd->pnd_flags & PND_REMOVED) 2802 puffs_setback(puffs_cc_getcc(pu), PUFFS_SETBACK_NOREF_N1); 2803 2804 /* 2805 * Schedule awaiting operations 2806 */ 2807 pnd->pnd_flags &= ~PND_INOPEN; 2808 (void)dequeue_requests(ps, opc, PCQ_OPEN, DEQUEUE_ALL); 2809 2810 return 0; 2811 } 2812 2813 2814 /* ARGSUSED0 */ 2815 int 2816 perfuse_node_print(struct puffs_usermount *pu, puffs_cookie_t opc) 2817 { 2818 DERRX(EX_SOFTWARE, "%s: UNIMPLEMENTED (FATAL)", __func__); 2819 return 0; 2820 } 2821 2822 /* ARGSUSED0 */ 2823 int 2824 perfuse_node_pathconf(struct puffs_usermount *pu, puffs_cookie_t opc, 2825 int name, int *retval) 2826 { 2827 DERRX(EX_SOFTWARE, "%s: UNIMPLEMENTED (FATAL)", __func__); 2828 return 0; 2829 } 2830 2831 int 2832 perfuse_node_advlock(struct puffs_usermount *pu, puffs_cookie_t opc, 2833 void *id, int op, struct flock *fl, int flags) 2834 { 2835 struct perfuse_state *ps; 2836 int fop; 2837 perfuse_msg_t *pm; 2838 uint64_t fh; 2839 struct fuse_lk_in *fli; 2840 struct fuse_out_header *foh; 2841 struct fuse_lk_out *flo; 2842 uint32_t owner; 2843 size_t len; 2844 int error; 2845 2846 /* 2847 * Make sure we do have a filehandle, as the FUSE filesystem 2848 * expect one. E.g.: if we provide none, GlusterFS logs an error 2849 * "0-glusterfs-fuse: xl is NULL" 2850 * 2851 * We need the read file handle if the file is open read only, 2852 * in order to support shared locks on read-only files. 2853 * NB: The kernel always sends advlock for read-only 2854 * files at exit time when the process used lock, see 2855 * sys_exit -> exit1 -> fd_free -> fd_close -> VOP_ADVLOCK 2856 */ 2857 if ((fh = perfuse_get_fh(opc, FREAD)) == FUSE_UNKNOWN_FH) 2858 return EBADF; 2859 2860 ps = puffs_getspecific(pu); 2861 2862 if (op == F_GETLK) 2863 fop = FUSE_GETLK; 2864 else 2865 fop = (flags & F_WAIT) ? FUSE_SETLKW : FUSE_SETLK; 2866 2867 /* 2868 * XXX ps_new_msg() is called with NULL creds, which will 2869 * be interpreted as FUSE superuser. We have no way to 2870 * know the requesting process' credential, but since advlock() 2871 * is supposed to operate on a file that has been open(), 2872 * permission should have already been checked at open() time. 2873 */ 2874 pm = ps->ps_new_msg(pu, opc, fop, sizeof(*fli), NULL); 2875 fli = GET_INPAYLOAD(ps, pm, fuse_lk_in); 2876 fli->fh = fh; 2877 fli->owner = (uint64_t)(vaddr_t)id; 2878 fli->lk.start = fl->l_start; 2879 fli->lk.end = fl->l_start + fl->l_len; 2880 fli->lk.type = fl->l_type; 2881 fli->lk.pid = fl->l_pid; 2882 fli->lk_flags = (flags & F_FLOCK) ? FUSE_LK_FLOCK : 0; 2883 2884 owner = (uint32_t)(vaddr_t)id; 2885 2886 #ifdef PERFUSE_DEBUG 2887 if (perfuse_diagflags & PDF_FH) 2888 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", fh = 0x%"PRIx64"\n", 2889 __func__, (void *)opc, 2890 PERFUSE_NODE_DATA(opc)->pnd_nodeid, fli->fh); 2891 #endif 2892 2893 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 2894 return error; 2895 2896 foh = GET_OUTHDR(ps, pm); 2897 len = foh->len - sizeof(*foh); 2898 2899 /* 2900 * Save or clear the lock 2901 */ 2902 switch (op) { 2903 case F_GETLK: 2904 if (len != sizeof(*flo)) 2905 DERRX(EX_SOFTWARE, 2906 "%s: Unexpected lock reply len %zd", 2907 __func__, len); 2908 2909 flo = GET_OUTPAYLOAD(ps, pm, fuse_lk_out); 2910 fl->l_start = flo->lk.start; 2911 fl->l_len = flo->lk.end - flo->lk.start; 2912 fl->l_pid = flo->lk.pid; 2913 fl->l_type = flo->lk.type; 2914 fl->l_whence = SEEK_SET; /* libfuse hardcodes it */ 2915 2916 PERFUSE_NODE_DATA(opc)->pnd_lock_owner = flo->lk.pid; 2917 break; 2918 case F_UNLCK: 2919 owner = 0; 2920 /* FALLTHROUGH */ 2921 case F_SETLK: 2922 /* FALLTHROUGH */ 2923 case F_SETLKW: 2924 if (error != 0) 2925 PERFUSE_NODE_DATA(opc)->pnd_lock_owner = owner; 2926 2927 if (len != 0) 2928 DERRX(EX_SOFTWARE, 2929 "%s: Unexpected unlock reply len %zd", 2930 __func__, len); 2931 2932 break; 2933 default: 2934 DERRX(EX_SOFTWARE, "%s: Unexpected op %d", __func__, op); 2935 break; 2936 } 2937 2938 ps->ps_destroy_msg(pm); 2939 2940 return 0; 2941 } 2942 2943 int 2944 perfuse_node_read(struct puffs_usermount *pu, puffs_cookie_t opc, uint8_t *buf, 2945 off_t offset, size_t *resid, const struct puffs_cred *pcr, int ioflag) 2946 { 2947 struct perfuse_state *ps; 2948 struct perfuse_node_data *pnd; 2949 const struct vattr *vap; 2950 perfuse_msg_t *pm; 2951 struct fuse_read_in *fri; 2952 struct fuse_out_header *foh; 2953 size_t readen; 2954 int error; 2955 2956 ps = puffs_getspecific(pu); 2957 pnd = PERFUSE_NODE_DATA(opc); 2958 vap = puffs_pn_getvap((struct puffs_node *)opc); 2959 2960 /* 2961 * NetBSD turns that into a getdents(2) output 2962 * We just do a EISDIR as this feature is of little use. 2963 */ 2964 if (vap->va_type == VDIR) 2965 return EISDIR; 2966 2967 if ((u_quad_t)offset + *resid > vap->va_size) 2968 DWARNX("%s %p read %lld@%zu beyond EOF %" PRIu64 "\n", 2969 __func__, (void *)opc, (long long)offset, 2970 *resid, vap->va_size); 2971 2972 do { 2973 size_t max_read; 2974 2975 max_read = ps->ps_max_readahead - sizeof(*foh); 2976 /* 2977 * flags may be set to FUSE_READ_LOCKOWNER 2978 * if lock_owner is provided. 2979 */ 2980 pm = ps->ps_new_msg(pu, opc, FUSE_READ, sizeof(*fri), pcr); 2981 fri = GET_INPAYLOAD(ps, pm, fuse_read_in); 2982 fri->fh = perfuse_get_fh(opc, FREAD); 2983 fri->offset = offset; 2984 fri->size = (uint32_t)MIN(*resid, max_read); 2985 fri->read_flags = 0; /* XXX Unused by libfuse? */ 2986 fri->lock_owner = pnd->pnd_lock_owner; 2987 fri->flags = 0; 2988 fri->flags |= (fri->lock_owner != 0) ? FUSE_READ_LOCKOWNER : 0; 2989 2990 #ifdef PERFUSE_DEBUG 2991 if (perfuse_diagflags & PDF_FH) 2992 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", fh = 0x%"PRIx64"\n", 2993 __func__, (void *)opc, pnd->pnd_nodeid, fri->fh); 2994 #endif 2995 error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply); 2996 if (error != 0) 2997 return error; 2998 2999 foh = GET_OUTHDR(ps, pm); 3000 readen = foh->len - sizeof(*foh); 3001 3002 #ifdef PERFUSE_DEBUG 3003 if (readen > *resid) 3004 DERRX(EX_SOFTWARE, "%s: Unexpected big read %zd", 3005 __func__, readen); 3006 #endif 3007 3008 (void)memcpy(buf, _GET_OUTPAYLOAD(ps, pm, char *), readen); 3009 3010 buf += readen; 3011 offset += readen; 3012 *resid -= readen; 3013 3014 ps->ps_destroy_msg(pm); 3015 } while ((*resid != 0) && (readen != 0)); 3016 3017 if (ioflag & (IO_SYNC|IO_DSYNC)) 3018 ps->ps_syncreads++; 3019 else 3020 ps->ps_asyncreads++; 3021 3022 return 0; 3023 } 3024 3025 int 3026 perfuse_node_write(struct puffs_usermount *pu, puffs_cookie_t opc, uint8_t *buf, 3027 off_t offset, size_t *resid, const struct puffs_cred *pcr, int ioflag) 3028 { 3029 struct perfuse_state *ps; 3030 struct perfuse_node_data *pnd; 3031 struct vattr *vap; 3032 perfuse_msg_t *pm; 3033 struct fuse_write_in *fwi; 3034 struct fuse_write_out *fwo; 3035 size_t data_len; 3036 size_t payload_len; 3037 size_t written; 3038 int inresize; 3039 int error; 3040 3041 ps = puffs_getspecific(pu); 3042 pnd = PERFUSE_NODE_DATA(opc); 3043 vap = puffs_pn_getvap((struct puffs_node *)opc); 3044 written = 0; 3045 inresize = 0; 3046 error = 0; 3047 3048 if (vap->va_type == VDIR) 3049 return EISDIR; 3050 3051 /* 3052 * We need to queue write requests in order to avoid 3053 * dequeueing PCQ_AFTERWRITE when there are pending writes. 3054 */ 3055 while (pnd->pnd_flags & PND_INWRITE) 3056 requeue_request(pu, opc, PCQ_WRITE); 3057 pnd->pnd_flags |= PND_INWRITE; 3058 3059 /* 3060 * Serialize size access, see comment in perfuse_node_setattr(). 3061 */ 3062 if ((u_quad_t)offset + *resid > vap->va_size) { 3063 while (pnd->pnd_flags & PND_INRESIZE) 3064 requeue_request(pu, opc, PCQ_RESIZE); 3065 pnd->pnd_flags |= PND_INRESIZE; 3066 inresize = 1; 3067 } 3068 3069 /* 3070 * append flag: re-read the file size so that 3071 * we get the latest value. 3072 */ 3073 if (ioflag & PUFFS_IO_APPEND) { 3074 DWARNX("%s: PUFFS_IO_APPEND set, untested code", __func__); 3075 3076 if ((error = perfuse_node_getattr(pu, opc, vap, pcr)) != 0) 3077 goto out; 3078 3079 offset = vap->va_size; 3080 } 3081 3082 #ifdef PERFUSE_DEBUG 3083 if (perfuse_diagflags & PDF_RESIZE) 3084 DPRINTF(">> %s %p %" PRIu64 "\n", __func__, 3085 (void *)opc, vap->va_size); 3086 #endif 3087 3088 do { 3089 size_t max_write; 3090 /* 3091 * There is a writepage flag when data 3092 * is aligned to page size. Use it for 3093 * everything but the data after the last 3094 * page boundary. 3095 */ 3096 max_write = ps->ps_max_write - sizeof(*fwi); 3097 3098 data_len = MIN(*resid, max_write); 3099 if (data_len > (size_t)sysconf(_SC_PAGESIZE)) 3100 data_len = data_len & ~(sysconf(_SC_PAGESIZE) - 1); 3101 3102 payload_len = data_len + sizeof(*fwi); 3103 3104 /* 3105 * flags may be set to FUSE_WRITE_CACHE (XXX usage?) 3106 * or FUSE_WRITE_LOCKOWNER, if lock_owner is provided. 3107 * write_flags is set to 1 for writepage. 3108 */ 3109 pm = ps->ps_new_msg(pu, opc, FUSE_WRITE, payload_len, pcr); 3110 fwi = GET_INPAYLOAD(ps, pm, fuse_write_in); 3111 fwi->fh = perfuse_get_fh(opc, FWRITE); 3112 fwi->offset = offset; 3113 fwi->size = (uint32_t)data_len; 3114 fwi->write_flags = (fwi->size % sysconf(_SC_PAGESIZE)) ? 0 : 1; 3115 fwi->lock_owner = pnd->pnd_lock_owner; 3116 fwi->flags = 0; 3117 fwi->flags |= (fwi->lock_owner != 0) ? FUSE_WRITE_LOCKOWNER : 0; 3118 fwi->flags |= (ioflag & IO_DIRECT) ? 0 : FUSE_WRITE_CACHE; 3119 (void)memcpy((fwi + 1), buf, data_len); 3120 3121 3122 #ifdef PERFUSE_DEBUG 3123 if (perfuse_diagflags & PDF_FH) 3124 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", " 3125 "fh = 0x%"PRIx64"\n", __func__, 3126 (void *)opc, pnd->pnd_nodeid, fwi->fh); 3127 #endif 3128 if ((error = xchg_msg(pu, opc, pm, 3129 sizeof(*fwo), wait_reply)) != 0) 3130 goto out; 3131 3132 fwo = GET_OUTPAYLOAD(ps, pm, fuse_write_out); 3133 written = fwo->size; 3134 #ifdef PERFUSE_DEBUG 3135 if (written > *resid) 3136 DERRX(EX_SOFTWARE, "%s: Unexpected big write %zd", 3137 __func__, written); 3138 #endif 3139 *resid -= written; 3140 offset += written; 3141 buf += written; 3142 3143 ps->ps_destroy_msg(pm); 3144 } while (*resid != 0); 3145 3146 /* 3147 * puffs_ops(3) says 3148 * "everything must be written or an error will be generated" 3149 */ 3150 if (*resid != 0) 3151 error = EFBIG; 3152 3153 #ifdef PERFUSE_DEBUG 3154 if (perfuse_diagflags & PDF_RESIZE) { 3155 if (offset > (off_t)vap->va_size) 3156 DPRINTF("<< %s %p %" PRIu64 " -> %lld\n", __func__, 3157 (void *)opc, vap->va_size, (long long)offset); 3158 else 3159 DPRINTF("<< %s %p \n", __func__, (void *)opc); 3160 } 3161 #endif 3162 3163 /* 3164 * Update file size if we wrote beyond the end 3165 */ 3166 if (offset > (off_t)vap->va_size) 3167 vap->va_size = offset; 3168 3169 if (inresize) { 3170 #ifdef PERFUSE_DEBUG 3171 if (!(pnd->pnd_flags & PND_INRESIZE)) 3172 DERRX(EX_SOFTWARE, "file write grow without resize"); 3173 #endif 3174 pnd->pnd_flags &= ~PND_INRESIZE; 3175 (void)dequeue_requests(ps, opc, PCQ_RESIZE, DEQUEUE_ALL); 3176 } 3177 3178 3179 /* 3180 * Statistics 3181 */ 3182 if (ioflag & (IO_SYNC|IO_DSYNC)) 3183 ps->ps_syncwrites++; 3184 else 3185 ps->ps_asyncwrites++; 3186 3187 /* 3188 * Remember to sync the file 3189 */ 3190 pnd->pnd_flags |= PND_DIRTY; 3191 3192 #ifdef PERFUSE_DEBUG 3193 if (perfuse_diagflags & PDF_SYNC) 3194 DPRINTF("%s: DIRTY opc = %p, file = \"%s\"\n", 3195 __func__, (void*)opc, perfuse_node_path(opc)); 3196 #endif 3197 3198 out: 3199 /* 3200 * If there are no more queued write, we can resume 3201 * an operation awaiting write completion. 3202 */ 3203 pnd->pnd_flags &= ~PND_INWRITE; 3204 if (dequeue_requests(ps, opc, PCQ_WRITE, 1) == 0) 3205 (void)dequeue_requests(ps, opc, PCQ_AFTERWRITE, DEQUEUE_ALL); 3206 3207 return error; 3208 } 3209 3210 /* ARGSUSED0 */ 3211 void 3212 perfuse_cache_write(struct puffs_usermount *pu, puffs_cookie_t opc, size_t size, 3213 struct puffs_cacherun *runs) 3214 { 3215 return; 3216 } 3217 3218 /* ARGSUSED4 */ 3219 int 3220 perfuse_node_getextattr(struct puffs_usermount *pu, puffs_cookie_t opc, 3221 int attrns, const char *attrname, size_t *attrsize, uint8_t *attr, 3222 size_t *resid, const struct puffs_cred *pcr) 3223 { 3224 struct perfuse_state *ps; 3225 char fuse_attrname[LINUX_XATTR_NAME_MAX + 1]; 3226 perfuse_msg_t *pm; 3227 struct fuse_getxattr_in *fgi; 3228 struct fuse_getxattr_out *fgo; 3229 struct fuse_out_header *foh; 3230 size_t attrnamelen; 3231 size_t len; 3232 char *np; 3233 int error; 3234 3235 ps = puffs_getspecific(pu); 3236 attrname = perfuse_native_ns(attrns, attrname, fuse_attrname); 3237 attrnamelen = strlen(attrname) + 1; 3238 len = sizeof(*fgi) + attrnamelen; 3239 3240 pm = ps->ps_new_msg(pu, opc, FUSE_GETXATTR, len, pcr); 3241 fgi = GET_INPAYLOAD(ps, pm, fuse_getxattr_in); 3242 fgi->size = (unsigned int)((resid != NULL) ? *resid : 0); 3243 np = (char *)(void *)(fgi + 1); 3244 (void)strlcpy(np, attrname, attrnamelen); 3245 3246 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 3247 return error; 3248 3249 /* 3250 * We just get fuse_getattr_out with list size if we requested 3251 * a null size. 3252 */ 3253 if (resid == NULL) { 3254 fgo = GET_OUTPAYLOAD(ps, pm, fuse_getxattr_out); 3255 3256 if (attrsize != NULL) 3257 *attrsize = fgo->size; 3258 3259 ps->ps_destroy_msg(pm); 3260 return 0; 3261 } 3262 3263 /* 3264 * And with a non null requested size, we get the list just 3265 * after the header 3266 */ 3267 foh = GET_OUTHDR(ps, pm); 3268 np = (char *)(void *)(foh + 1); 3269 3270 if (resid != NULL) { 3271 len = MAX(foh->len - sizeof(*foh), *resid); 3272 (void)memcpy(attr, np, len); 3273 *resid -= len; 3274 } 3275 3276 ps->ps_destroy_msg(pm); 3277 3278 return 0; 3279 } 3280 3281 int 3282 perfuse_node_setextattr(struct puffs_usermount *pu, puffs_cookie_t opc, 3283 int attrns, const char *attrname, uint8_t *attr, size_t *resid, 3284 const struct puffs_cred *pcr) 3285 { 3286 struct perfuse_state *ps; 3287 char fuse_attrname[LINUX_XATTR_NAME_MAX + 1]; 3288 perfuse_msg_t *pm; 3289 struct fuse_setxattr_in *fsi; 3290 size_t attrnamelen; 3291 size_t len; 3292 char *np; 3293 int error; 3294 3295 ps = puffs_getspecific(pu); 3296 attrname = perfuse_native_ns(attrns, attrname, fuse_attrname); 3297 attrnamelen = strlen(attrname) + 1; 3298 len = sizeof(*fsi) + attrnamelen + *resid; 3299 3300 pm = ps->ps_new_msg(pu, opc, FUSE_SETXATTR, len, pcr); 3301 fsi = GET_INPAYLOAD(ps, pm, fuse_setxattr_in); 3302 fsi->size = (unsigned int)*resid; 3303 fsi->flags = 0; 3304 np = (char *)(void *)(fsi + 1); 3305 (void)strlcpy(np, attrname, attrnamelen); 3306 np += attrnamelen; 3307 (void)memcpy(np, (char *)attr, *resid); 3308 3309 if ((error = xchg_msg(pu, opc, pm, 3310 NO_PAYLOAD_REPLY_LEN, wait_reply)) != 0) 3311 return error; 3312 3313 *resid = 0; 3314 ps->ps_destroy_msg(pm); 3315 3316 return 0; 3317 } 3318 3319 /* ARGSUSED2 */ 3320 int 3321 perfuse_node_listextattr(struct puffs_usermount *pu, puffs_cookie_t opc, 3322 int attrns, size_t *attrsize, uint8_t *attrs, size_t *resid, int flag, 3323 const struct puffs_cred *pcr) 3324 { 3325 struct perfuse_state *ps; 3326 perfuse_msg_t *pm; 3327 struct fuse_getxattr_in *fgi; 3328 struct fuse_getxattr_out *fgo; 3329 struct fuse_out_header *foh; 3330 char *np; 3331 size_t len, puffs_len; 3332 int error; 3333 3334 ps = puffs_getspecific(pu); 3335 len = sizeof(*fgi); 3336 3337 pm = ps->ps_new_msg(pu, opc, FUSE_LISTXATTR, len, pcr); 3338 fgi = GET_INPAYLOAD(ps, pm, fuse_getxattr_in); 3339 if (resid != NULL) 3340 fgi->size = (unsigned int)*resid; 3341 else 3342 fgi->size = 0; 3343 3344 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 3345 return error; 3346 3347 /* 3348 * We just get fuse_getattr_out with list size if we requested 3349 * a null size. 3350 */ 3351 if (resid == NULL) { 3352 fgo = GET_OUTPAYLOAD(ps, pm, fuse_getxattr_out); 3353 3354 if (attrsize != NULL) 3355 *attrsize = fgo->size; 3356 3357 ps->ps_destroy_msg(pm); 3358 3359 return 0; 3360 } 3361 3362 /* 3363 * And with a non null requested size, we get the list just 3364 * after the header 3365 */ 3366 foh = GET_OUTHDR(ps, pm); 3367 np = (char *)(void *)(foh + 1); 3368 puffs_len = foh->len - sizeof(*foh); 3369 3370 if (attrs != NULL) { 3371 #ifdef PUFFS_EXTATTR_LIST_LENPREFIX 3372 /* 3373 * Convert the FUSE reply to length prefixed strings 3374 * if this is what the kernel wants. 3375 */ 3376 if (flag & PUFFS_EXTATTR_LIST_LENPREFIX) { 3377 size_t i, attrlen; 3378 3379 for (i = 0; i < puffs_len; i += attrlen + 1) { 3380 attrlen = strlen(np + i); 3381 (void)memmove(np + i + 1, np + i, attrlen); 3382 *(np + i) = (uint8_t)attrlen; 3383 } 3384 } 3385 #endif /* PUFFS_EXTATTR_LIST_LENPREFIX */ 3386 (void)memcpy(attrs, np, puffs_len); 3387 *resid -= puffs_len; 3388 } 3389 3390 if (attrsize != NULL) 3391 *attrsize = puffs_len; 3392 3393 ps->ps_destroy_msg(pm); 3394 3395 return 0; 3396 } 3397 3398 int 3399 perfuse_node_deleteextattr(struct puffs_usermount *pu, puffs_cookie_t opc, 3400 int attrns, const char *attrname, const struct puffs_cred *pcr) 3401 { 3402 struct perfuse_state *ps; 3403 char fuse_attrname[LINUX_XATTR_NAME_MAX + 1]; 3404 perfuse_msg_t *pm; 3405 size_t attrnamelen; 3406 char *np; 3407 int error; 3408 3409 ps = puffs_getspecific(pu); 3410 attrname = perfuse_native_ns(attrns, attrname, fuse_attrname); 3411 attrnamelen = strlen(attrname) + 1; 3412 3413 pm = ps->ps_new_msg(pu, opc, FUSE_REMOVEXATTR, attrnamelen, pcr); 3414 np = _GET_INPAYLOAD(ps, pm, char *); 3415 (void)strlcpy(np, attrname, attrnamelen); 3416 3417 error = xchg_msg(pu, opc, pm, NO_PAYLOAD_REPLY_LEN, wait_reply); 3418 3419 ps->ps_destroy_msg(pm); 3420 3421 return error; 3422 } 3423
Indexes created Tue Sep 23 14:10:03 GMT 2025