ops.c revision 1.80
1 /* $NetBSD: ops.c,v 1.80 2014/11/04 09:17:31 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/socket.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 puffs_node *, struct fuse_entry_out *, struct fuse_attr_out *); 54 #endif /* PUFFS_KFLAG_CACHE_FS_TTL */ 55 static int xchg_msg(struct puffs_usermount *, puffs_cookie_t, 56 perfuse_msg_t *, size_t, enum perfuse_xchg_pb_reply); 57 static int mode_access(puffs_cookie_t, const struct puffs_cred *, mode_t); 58 static int sticky_access(puffs_cookie_t, struct puffs_node *, 59 const struct puffs_cred *); 60 static void fuse_attr_to_vap(struct perfuse_state *, 61 struct vattr *, struct fuse_attr *); 62 static int node_lookup_common(struct puffs_usermount *, puffs_cookie_t, 63 struct puffs_newinfo *, const char *, const struct puffs_cred *, 64 struct puffs_node **); 65 static int node_mk_common(struct puffs_usermount *, puffs_cookie_t, 66 struct puffs_newinfo *, const struct puffs_cn *pcn, perfuse_msg_t *); 67 static uint64_t readdir_last_cookie(struct fuse_dirent *, size_t); 68 static ssize_t fuse_to_dirent(struct puffs_usermount *, puffs_cookie_t, 69 struct fuse_dirent *, size_t); 70 static void readdir_buffered(puffs_cookie_t, struct dirent *, off_t *, 71 size_t *); 72 static void node_ref(puffs_cookie_t); 73 static void node_rele(puffs_cookie_t); 74 static void requeue_request(struct puffs_usermount *, 75 puffs_cookie_t opc, enum perfuse_qtype); 76 static int dequeue_requests(puffs_cookie_t opc, enum perfuse_qtype, int); 77 #define DEQUEUE_ALL 0 78 79 /* 80 * From <sys/vnode>, inside #ifdef _KERNEL section 81 */ 82 #define IO_SYNC (0x40|IO_DSYNC) 83 #define IO_DSYNC 0x00200 84 #define IO_DIRECT 0x02000 85 86 /* 87 * From <fcntl>, inside #ifdef _KERNEL section 88 */ 89 #define F_WAIT 0x010 90 #define F_FLOCK 0x020 91 #define OFLAGS(fflags) ((fflags) - 1) 92 93 /* 94 * Borrowed from src/sys/kern/vfs_subr.c and src/sys/sys/vnode.h 95 */ 96 const enum vtype iftovt_tab[16] = { 97 VNON, VFIFO, VCHR, VNON, VDIR, VNON, VBLK, VNON, 98 VREG, VNON, VLNK, VNON, VSOCK, VNON, VNON, VBAD, 99 }; 100 const int vttoif_tab[9] = { 101 0, S_IFREG, S_IFDIR, S_IFBLK, S_IFCHR, S_IFLNK, 102 S_IFSOCK, S_IFIFO, S_IFMT, 103 }; 104 105 #define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12]) 106 #define VTTOIF(indx) (vttoif_tab[(int)(indx)]) 107 108 #if 0 109 static void 110 print_node(const char *func, puffs_cookie_t opc) 111 { 112 struct puffs_node *pn; 113 struct perfuse_node_data *pnd; 114 struct vattr *vap; 115 116 pn = (struct puffs_node *)opc; 117 pnd = PERFUSE_NODE_DATA(opc); 118 vap = &pn->pn_va; 119 120 printf("%s: \"%s\", opc = %p, nodeid = 0x%"PRIx64" ino = %"PRIu64"\n", 121 func, pnd->pnd_name, opc, pnd->pnd_nodeid, vap->va_fileid); 122 123 return; 124 } 125 #endif /* PERFUSE_DEBUG */ 126 127 int 128 perfuse_node_close_common(struct puffs_usermount *pu, puffs_cookie_t opc, 129 int mode) 130 { 131 struct perfuse_state *ps; 132 perfuse_msg_t *pm; 133 int op; 134 uint64_t fh; 135 struct fuse_release_in *fri; 136 struct perfuse_node_data *pnd; 137 struct puffs_node *pn; 138 int error; 139 140 ps = puffs_getspecific(pu); 141 pn = (struct puffs_node *)opc; 142 pnd = PERFUSE_NODE_DATA(pn); 143 144 if (puffs_pn_getvap(pn)->va_type == VDIR) { 145 op = FUSE_RELEASEDIR; 146 mode = FREAD; 147 } else { 148 op = FUSE_RELEASE; 149 } 150 151 /* 152 * Destroy the filehandle before sending the 153 * request to the FUSE filesystem, otherwise 154 * we may get a second close() while we wait 155 * for the reply, and we would end up closing 156 * the same fh twice instead of closng both. 157 */ 158 fh = perfuse_get_fh(opc, mode); 159 perfuse_destroy_fh(pn, fh); 160 161 /* 162 * release_flags may be set to FUSE_RELEASE_FLUSH 163 * to flush locks. lock_owner must be set in that case 164 * 165 * ps_new_msg() is called with NULL creds, which will 166 * be interpreted as FUSE superuser. We come here from the 167 * inactive method, which provides no creds, but obviously 168 * runs with kernel privilege. 169 */ 170 pm = ps->ps_new_msg(pu, opc, op, sizeof(*fri), NULL); 171 fri = GET_INPAYLOAD(ps, pm, fuse_release_in); 172 fri->fh = fh; 173 fri->flags = 0; 174 fri->release_flags = 0; 175 fri->lock_owner = pnd->pnd_lock_owner; 176 fri->flags = (fri->lock_owner != 0) ? FUSE_RELEASE_FLUSH : 0; 177 178 #ifdef PERFUSE_DEBUG 179 if (perfuse_diagflags & PDF_FH) 180 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", fh = 0x%"PRIx64"\n", 181 __func__, (void *)opc, pnd->pnd_nodeid, fri->fh); 182 #endif 183 184 if ((error = xchg_msg(pu, opc, pm, 185 NO_PAYLOAD_REPLY_LEN, wait_reply)) != 0) 186 DERRX(EX_SOFTWARE, "%s: freed fh = 0x%"PRIx64" but filesystem " 187 "returned error = %d", __func__, fh, error); 188 189 ps->ps_destroy_msg(pm); 190 191 return 0; 192 } 193 194 static int 195 xchg_msg(struct puffs_usermount *pu, puffs_cookie_t opc, perfuse_msg_t *pm, 196 size_t len, enum perfuse_xchg_pb_reply wait) 197 { 198 struct perfuse_state *ps; 199 struct perfuse_node_data *pnd; 200 struct perfuse_trace *pt = NULL; 201 int error; 202 203 ps = puffs_getspecific(pu); 204 pnd = NULL; 205 if ((struct puffs_node *)opc != NULL) 206 pnd = PERFUSE_NODE_DATA(opc); 207 208 #ifdef PERFUSE_DEBUG 209 if ((perfuse_diagflags & PDF_FILENAME) && (opc != 0)) 210 DPRINTF("file = \"%s\", ino = %"PRIu64" flags = 0x%x\n", 211 perfuse_node_path(ps, opc), 212 ((struct puffs_node *)opc)->pn_va.va_fileid, 213 PERFUSE_NODE_DATA(opc)->pnd_flags); 214 #endif 215 ps->ps_xchgcount++; 216 if (pnd) 217 pnd->pnd_inxchg++; 218 219 /* 220 * Record FUSE call start if requested 221 */ 222 if (perfuse_diagflags & PDF_TRACE) 223 pt = perfuse_trace_begin(ps, opc, pm); 224 225 /* 226 * Do actual FUSE exchange 227 */ 228 if ((error = ps->ps_xchg_msg(pu, pm, len, wait)) != 0) 229 ps->ps_destroy_msg(pm); 230 231 /* 232 * Record FUSE call end if requested 233 */ 234 if (pt != NULL) 235 perfuse_trace_end(ps, pt, error); 236 237 ps->ps_xchgcount--; 238 if (pnd) { 239 pnd->pnd_inxchg--; 240 (void)dequeue_requests(opc, PCQ_AFTERXCHG, DEQUEUE_ALL); 241 } 242 243 return error; 244 } 245 246 static int 247 mode_access(puffs_cookie_t opc, const struct puffs_cred *pcr, mode_t mode) 248 { 249 struct puffs_node *pn; 250 struct vattr *va; 251 252 /* 253 * pcr is NULL for self open through fsync or readdir. 254 * In both case, access control is useless, as it was 255 * done before, at open time. 256 */ 257 if (pcr == NULL) 258 return 0; 259 260 pn = (struct puffs_node *)opc; 261 va = puffs_pn_getvap(pn); 262 return puffs_access(va->va_type, va->va_mode, 263 va->va_uid, va->va_gid, 264 mode, pcr); 265 } 266 267 static int 268 sticky_access(puffs_cookie_t opc, struct puffs_node *targ, 269 const struct puffs_cred *pcr) 270 { 271 uid_t uid; 272 int sticky, owner, parent_owner; 273 274 /* 275 * This covers the case where the kernel requests a DELETE 276 * or RENAME on its own, and where puffs_cred_getuid would 277 * return -1. While such a situation should not happen, 278 * we allow it here. 279 * 280 * This also allows root to tamper with other users' files 281 * that have the sticky bit. 282 */ 283 if (puffs_cred_isjuggernaut(pcr)) 284 return 0; 285 286 if (puffs_cred_getuid(pcr, &uid) != 0) 287 DERRX(EX_SOFTWARE, "puffs_cred_getuid fails in %s", __func__); 288 289 sticky = puffs_pn_getvap(opc)->va_mode & S_ISTXT; 290 owner = puffs_pn_getvap(targ)->va_uid == uid; 291 parent_owner = puffs_pn_getvap(opc)->va_uid == uid; 292 293 if (sticky && !owner && !parent_owner) 294 return EPERM; 295 296 return 0; 297 } 298 299 300 static void 301 fuse_attr_to_vap(struct perfuse_state *ps, struct vattr *vap, 302 struct fuse_attr *fa) 303 { 304 vap->va_type = IFTOVT(fa->mode); 305 vap->va_mode = fa->mode & ALLPERMS; 306 vap->va_nlink = fa->nlink; 307 vap->va_uid = fa->uid; 308 vap->va_gid = fa->gid; 309 vap->va_fsid = (long)ps->ps_fsid; 310 vap->va_fileid = fa->ino; 311 vap->va_size = fa->size; 312 vap->va_blocksize = fa->blksize; 313 vap->va_atime.tv_sec = (time_t)fa->atime; 314 vap->va_atime.tv_nsec = (long) fa->atimensec; 315 vap->va_mtime.tv_sec = (time_t)fa->mtime; 316 vap->va_mtime.tv_nsec = (long)fa->mtimensec; 317 vap->va_ctime.tv_sec = (time_t)fa->ctime; 318 vap->va_ctime.tv_nsec = (long)fa->ctimensec; 319 vap->va_birthtime.tv_sec = 0; 320 vap->va_birthtime.tv_nsec = 0; 321 vap->va_gen = 0; 322 vap->va_flags = 0; 323 vap->va_rdev = fa->rdev; 324 vap->va_bytes = fa->blocks * S_BLKSIZE; 325 vap->va_filerev = (u_quad_t)PUFFS_VNOVAL; 326 vap->va_vaflags = 0; 327 328 if (vap->va_blocksize == 0) 329 vap->va_blocksize = DEV_BSIZE; 330 331 if (vap->va_size == (size_t)PUFFS_VNOVAL) /* XXX */ 332 vap->va_size = 0; 333 334 return; 335 } 336 337 #ifdef PUFFS_KFLAG_CACHE_FS_TTL 338 static void 339 perfuse_newinfo_setttl(struct puffs_newinfo *pni, 340 struct puffs_node *pn, struct fuse_entry_out *feo, 341 struct fuse_attr_out *fao) 342 { 343 #ifdef PERFUSE_DEBUG 344 if ((feo == NULL) && (fao == NULL)) 345 DERRX(EX_SOFTWARE, "%s: feo and fao NULL", __func__); 346 347 if ((feo != NULL) && (fao != NULL)) 348 DERRX(EX_SOFTWARE, "%s: feo and fao != NULL", __func__); 349 #endif /* PERFUSE_DEBUG */ 350 351 if (fao != NULL) { 352 struct timespec va_ttl; 353 354 va_ttl.tv_sec = fao->attr_valid; 355 va_ttl.tv_nsec = fao->attr_valid_nsec; 356 357 puffs_newinfo_setvattl(pni, &va_ttl); 358 } 359 360 if (feo != NULL) { 361 struct timespec va_ttl; 362 struct timespec cn_ttl; 363 struct timespec now; 364 struct perfuse_node_data *pnd = PERFUSE_NODE_DATA(pn); 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 if (clock_gettime(CLOCK_REALTIME, &now) != 0) 375 DERR(EX_OSERR, "clock_gettime failed"); 376 377 timespecadd(&now, &cn_ttl, &pnd->pnd_cn_expire); 378 } 379 380 return; 381 } 382 #endif /* PUFFS_KFLAG_CACHE_FS_TTL */ 383 384 static int 385 node_lookup_common(struct puffs_usermount *pu, puffs_cookie_t opc, 386 struct puffs_newinfo *pni, const char *path, 387 const struct puffs_cred *pcr, struct puffs_node **pnp) 388 { 389 struct perfuse_state *ps; 390 struct perfuse_node_data *oldpnd; 391 perfuse_msg_t *pm; 392 struct fuse_entry_out *feo; 393 struct puffs_node *pn; 394 size_t len; 395 int error; 396 397 /* 398 * Prevent further lookups if the parent was removed 399 */ 400 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 401 return ESTALE; 402 403 if (pnp == NULL) 404 DERRX(EX_SOFTWARE, "pnp must be != NULL"); 405 406 ps = puffs_getspecific(pu); 407 408 #ifdef PERFUSE_DEBUG 409 if (perfuse_diagflags & PDF_FILENAME) 410 DPRINTF("%s: opc = %p, file = \"%s\" looking up \"%s\"\n", 411 __func__, (void *)opc, 412 perfuse_node_path(ps, opc), path); 413 414 if (strcmp(path, ".") == 0) 415 DERRX(EX_SOFTWARE, "unexpected dot-lookup"); 416 417 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_RECLAIMED) 418 DERRX(EX_SOFTWARE, 419 "looking up reclaimed node opc = %p, name = \"%s\"", 420 opc, path); 421 422 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_INVALID) 423 DERRX(EX_SOFTWARE, 424 "looking up freed node opc = %p, name = \"%s\"", 425 opc, path); 426 #endif /* PERFUSE_DEBUG */ 427 428 len = strlen(path) + 1; 429 pm = ps->ps_new_msg(pu, opc, FUSE_LOOKUP, len, pcr); 430 (void)strlcpy(_GET_INPAYLOAD(ps, pm, char *), path, len); 431 432 if ((error = xchg_msg(pu, opc, pm, sizeof(*feo), wait_reply)) != 0) 433 return error; 434 435 feo = GET_OUTPAYLOAD(ps, pm, fuse_entry_out); 436 437 /* 438 * Starting with ABI 7.4, inode number 0 means ENOENT, 439 * with entry_valid / entry_valid_nsec giving negative 440 * cache timeout (which we do not implement yet). 441 */ 442 if (feo->attr.ino == 0) { 443 ps->ps_destroy_msg(pm); 444 return ENOENT; 445 } 446 447 /* 448 * Check for a known node, not reclaimed, with another name. 449 * It may have been moved, or we can lookup ../ 450 */ 451 if (((oldpnd = perfuse_node_bynodeid(ps, feo->nodeid)) != NULL) && 452 !(oldpnd->pnd_flags & PND_RECLAIMED)) { 453 /* 454 * Save the new node name if not .. 455 */ 456 if (strncmp(path, "..", len) != 0) 457 (void)strlcpy(oldpnd->pnd_name, 458 path, MAXPATHLEN); 459 pn = oldpnd->pnd_pn; 460 461 } else { 462 pn = perfuse_new_pn(pu, path, opc); 463 PERFUSE_NODE_DATA(pn)->pnd_nodeid = feo->nodeid; 464 perfuse_node_cache(ps, pn); 465 } 466 467 #ifdef PERFUSE_DEBUG 468 if (PERFUSE_NODE_DATA(pn)->pnd_flags & PND_RECLAIMED) 469 DERRX(EX_SOFTWARE, 470 "reclaimed in lookup opc = %p, name = \"%s\", ck = %p", 471 opc, path, pn); 472 473 if (PERFUSE_NODE_DATA(pn)->pnd_flags & PND_INVALID) 474 DERRX(EX_SOFTWARE, 475 "freed in lookup opc = %p, name = \"%s\", ck = %p", 476 opc, path, pn); 477 #endif /* PERFUSE_DEBUG */ 478 479 fuse_attr_to_vap(ps, &pn->pn_va, &feo->attr); 480 pn->pn_va.va_gen = (u_long)(feo->generation); 481 PERFUSE_NODE_DATA(pn)->pnd_fuse_nlookup++; 482 483 *pnp = pn; 484 485 #ifdef PERFUSE_DEBUG 486 if (perfuse_diagflags & PDF_FILENAME) 487 DPRINTF("%s: opc = %p, looked up opc = %p, " 488 "nodeid = 0x%"PRIx64" file = \"%s\"\n", __func__, 489 (void *)opc, pn, feo->nodeid, path); 490 #endif 491 492 if (pni != NULL) { 493 #ifdef PUFFS_KFLAG_CACHE_FS_TTL 494 puffs_newinfo_setva(pni, &pn->pn_va); 495 perfuse_newinfo_setttl(pni, pn, feo, NULL); 496 #endif /* PUFFS_KFLAG_CACHE_FS_TTL */ 497 puffs_newinfo_setcookie(pni, pn); 498 puffs_newinfo_setvtype(pni, pn->pn_va.va_type); 499 puffs_newinfo_setsize(pni, (voff_t)pn->pn_va.va_size); 500 puffs_newinfo_setrdev(pni, pn->pn_va.va_rdev); 501 } 502 503 if (PERFUSE_NODE_DATA(pn)->pnd_flags & PND_NODELEAK) { 504 PERFUSE_NODE_DATA(pn)->pnd_flags &= ~PND_NODELEAK; 505 ps->ps_nodeleakcount--; 506 } 507 508 ps->ps_destroy_msg(pm); 509 510 return 0; 511 } 512 513 514 /* 515 * Common code for methods that create objects: 516 * perfuse_node_mkdir 517 * perfuse_node_mknod 518 * perfuse_node_symlink 519 */ 520 static int 521 node_mk_common(struct puffs_usermount *pu, puffs_cookie_t opc, 522 struct puffs_newinfo *pni, const struct puffs_cn *pcn, 523 perfuse_msg_t *pm) 524 { 525 struct perfuse_state *ps; 526 struct puffs_node *pn; 527 struct fuse_entry_out *feo; 528 int error; 529 530 ps = puffs_getspecific(pu); 531 532 if ((error = xchg_msg(pu, opc, pm, sizeof(*feo), wait_reply)) != 0) 533 return error; 534 535 feo = GET_OUTPAYLOAD(ps, pm, fuse_entry_out); 536 if (feo->nodeid == PERFUSE_UNKNOWN_NODEID) 537 DERRX(EX_SOFTWARE, "%s: no nodeid", __func__); 538 539 pn = perfuse_new_pn(pu, pcn->pcn_name, opc); 540 PERFUSE_NODE_DATA(pn)->pnd_nodeid = feo->nodeid; 541 PERFUSE_NODE_DATA(pn)->pnd_puffs_nlookup++; 542 perfuse_node_cache(ps, pn); 543 544 fuse_attr_to_vap(ps, &pn->pn_va, &feo->attr); 545 pn->pn_va.va_gen = (u_long)(feo->generation); 546 547 puffs_newinfo_setcookie(pni, pn); 548 #ifdef PUFFS_KFLAG_CACHE_FS_TTL 549 puffs_newinfo_setva(pni, &pn->pn_va); 550 perfuse_newinfo_setttl(pni, pn, feo, NULL); 551 #endif /* PUFFS_KFLAG_CACHE_FS_TTL */ 552 553 554 #ifdef PERFUSE_DEBUG 555 if (perfuse_diagflags & PDF_FILENAME) 556 DPRINTF("%s: opc = %p, file = \"%s\", flags = 0x%x " 557 "nodeid = 0x%"PRIx64"\n", 558 __func__, (void *)pn, pcn->pcn_name, 559 PERFUSE_NODE_DATA(pn)->pnd_flags, feo->nodeid); 560 #endif 561 ps->ps_destroy_msg(pm); 562 563 /* Parents is now dirty */ 564 PERFUSE_NODE_DATA(opc)->pnd_flags |= PND_DIRTY; 565 566 return 0; 567 } 568 569 static uint64_t 570 readdir_last_cookie(struct fuse_dirent *fd, size_t fd_len) 571 { 572 size_t len; 573 size_t seen = 0; 574 char *ndp; 575 576 do { 577 len = FUSE_DIRENT_ALIGN(sizeof(*fd) + fd->namelen); 578 seen += len; 579 580 if (seen >= fd_len) 581 break; 582 583 ndp = (char *)(void *)fd + (size_t)len; 584 fd = (struct fuse_dirent *)(void *)ndp; 585 } while (1 /* CONSTCOND */); 586 587 return fd->off; 588 } 589 590 static ssize_t 591 fuse_to_dirent(struct puffs_usermount *pu, puffs_cookie_t opc, 592 struct fuse_dirent *fd, size_t fd_len) 593 { 594 struct dirent *dents; 595 size_t dents_len; 596 ssize_t written; 597 uint64_t fd_offset; 598 struct fuse_dirent *fd_base; 599 size_t len; 600 601 fd_base = fd; 602 fd_offset = 0; 603 written = 0; 604 dents = PERFUSE_NODE_DATA(opc)->pnd_dirent; 605 dents_len = (size_t)PERFUSE_NODE_DATA(opc)->pnd_dirent_len; 606 607 do { 608 char *ndp; 609 size_t reclen; 610 char name[MAXPATHLEN]; 611 612 reclen = _DIRENT_RECLEN(dents, fd->namelen); 613 614 /* 615 * Check we do not overflow the output buffer 616 * struct fuse_dirent is bigger than struct dirent, 617 * so we should always use fd_len and never reallocate 618 * later. 619 * If we have to reallocate,try to double the buffer 620 * each time so that we do not have to do it too often. 621 */ 622 if (written + reclen > dents_len) { 623 if (dents_len == 0) 624 dents_len = fd_len; 625 else 626 dents_len = 627 MAX(2 * dents_len, written + reclen); 628 629 dents = PERFUSE_NODE_DATA(opc)->pnd_dirent; 630 if ((dents = realloc(dents, dents_len)) == NULL) 631 DERR(EX_OSERR, "%s: malloc failed", __func__); 632 633 PERFUSE_NODE_DATA(opc)->pnd_dirent = dents; 634 PERFUSE_NODE_DATA(opc)->pnd_dirent_len = dents_len; 635 636 /* 637 * (void *) for delint 638 */ 639 ndp = (char *)(void *)dents + written; 640 dents = (struct dirent *)(void *)ndp; 641 } 642 643 strncpy(name, fd->name, fd->namelen); 644 name[fd->namelen] = '\0'; 645 646 /* 647 * Filesystem was mounted without -o use_ino 648 * Perform a lookup to find it. 649 */ 650 if (fd->ino == PERFUSE_UNKNOWN_INO) { 651 struct puffs_node *pn; 652 struct perfuse_node_data *pnd = PERFUSE_NODE_DATA(opc); 653 654 /* 655 * Avoid breaking out of fs 656 * by lookup to .. on root 657 */ 658 if ((strcmp(name, "..") == 0) && 659 (pnd->pnd_nodeid == FUSE_ROOT_ID)) { 660 fd->ino = FUSE_ROOT_ID; 661 } else { 662 int error; 663 664 error = node_lookup_common(pu, opc, NULL, 665 name, NULL, &pn); 666 if (error != 0) { 667 DWARNX("node_lookup_common %s " 668 "failed: %d", name, error); 669 } else { 670 fd->ino = pn->pn_va.va_fileid; 671 (void)perfuse_node_reclaim(pu, pn); 672 } 673 } 674 } 675 676 dents->d_fileno = fd->ino; 677 dents->d_reclen = (unsigned short)reclen; 678 dents->d_namlen = fd->namelen; 679 dents->d_type = fd->type; 680 strlcpy(dents->d_name, name, fd->namelen + 1); 681 682 #ifdef PERFUSE_DEBUG 683 if (perfuse_diagflags & PDF_READDIR) 684 DPRINTF("%s: translated \"%s\" ino = %"PRIu64"\n", 685 __func__, dents->d_name, dents->d_fileno); 686 #endif 687 688 dents = _DIRENT_NEXT(dents); 689 written += reclen; 690 691 /* 692 * Move to the next record. 693 * fd->off is not the offset, it is an opaque cookie 694 * given by the filesystem to keep state across multiple 695 * readdir() operation. 696 * Use record alignement instead. 697 */ 698 len = FUSE_DIRENT_ALIGN(sizeof(*fd) + fd->namelen); 699 #ifdef PERFUSE_DEBUG 700 if (perfuse_diagflags & PDF_READDIR) 701 DPRINTF("%s: record at %"PRId64"/0x%"PRIx64" " 702 "length = %zd/0x%zx. " 703 "next record at %"PRId64"/0x%"PRIx64" " 704 "max %zd/0x%zx\n", 705 __func__, fd_offset, fd_offset, len, len, 706 fd_offset + len, fd_offset + len, 707 fd_len, fd_len); 708 #endif 709 fd_offset += len; 710 711 /* 712 * Check if next record is still within the packet 713 * If it is not, we reached the end of the buffer. 714 */ 715 if (fd_offset >= fd_len) 716 break; 717 718 /* 719 * (void *) for delint 720 */ 721 ndp = (char *)(void *)fd_base + (size_t)fd_offset; 722 fd = (struct fuse_dirent *)(void *)ndp; 723 724 } while (1 /* CONSTCOND */); 725 726 /* 727 * Adjust the dirent output length 728 */ 729 if (written != -1) 730 PERFUSE_NODE_DATA(opc)->pnd_dirent_len = written; 731 732 return written; 733 } 734 735 static void 736 readdir_buffered(puffs_cookie_t opc, struct dirent *dent, off_t *readoff, 737 size_t *reslen) 738 { 739 struct dirent *fromdent; 740 struct perfuse_node_data *pnd; 741 char *ndp; 742 743 pnd = PERFUSE_NODE_DATA(opc); 744 745 while (*readoff < pnd->pnd_dirent_len) { 746 /* 747 * (void *) for delint 748 */ 749 ndp = (char *)(void *)pnd->pnd_dirent + (size_t)*readoff; 750 fromdent = (struct dirent *)(void *)ndp; 751 752 if (*reslen < _DIRENT_SIZE(fromdent)) 753 break; 754 755 memcpy(dent, fromdent, _DIRENT_SIZE(fromdent)); 756 *readoff += _DIRENT_SIZE(fromdent); 757 *reslen -= _DIRENT_SIZE(fromdent); 758 759 dent = _DIRENT_NEXT(dent); 760 } 761 762 #ifdef PERFUSE_DEBUG 763 if (perfuse_diagflags & PDF_READDIR) 764 DPRINTF("%s: readoff = %"PRId64", " 765 "pnd->pnd_dirent_len = %"PRId64"\n", 766 __func__, *readoff, pnd->pnd_dirent_len); 767 #endif 768 if (*readoff >= pnd->pnd_dirent_len) { 769 free(pnd->pnd_dirent); 770 pnd->pnd_dirent = NULL; 771 pnd->pnd_dirent_len = 0; 772 } 773 774 return; 775 } 776 777 778 static void 779 node_ref(puffs_cookie_t opc) 780 { 781 struct perfuse_node_data *pnd = PERFUSE_NODE_DATA(opc); 782 783 #ifdef PERFUSE_DEBUG 784 if (pnd->pnd_flags & PND_INVALID) 785 DERRX(EX_SOFTWARE, "Use of freed node opc = %p", opc); 786 #endif /* PERFUSE_DEBUG */ 787 788 pnd->pnd_ref++; 789 return; 790 } 791 792 static void 793 node_rele(puffs_cookie_t opc) 794 { 795 struct perfuse_node_data *pnd = PERFUSE_NODE_DATA(opc); 796 797 #ifdef PERFUSE_DEBUG 798 if (pnd->pnd_flags & PND_INVALID) 799 DERRX(EX_SOFTWARE, "Use of freed node opc = %p", opc); 800 #endif /* PERFUSE_DEBUG */ 801 802 pnd->pnd_ref--; 803 804 if (pnd->pnd_ref == 0) 805 (void)dequeue_requests(opc, PCQ_REF, DEQUEUE_ALL); 806 807 return; 808 } 809 810 static void 811 requeue_request(struct puffs_usermount *pu, puffs_cookie_t opc, 812 enum perfuse_qtype type) 813 { 814 struct perfuse_cc_queue pcq; 815 struct perfuse_node_data *pnd; 816 817 pnd = PERFUSE_NODE_DATA(opc); 818 pcq.pcq_type = type; 819 pcq.pcq_cc = puffs_cc_getcc(pu); 820 TAILQ_INSERT_TAIL(&pnd->pnd_pcq, &pcq, pcq_next); 821 822 #ifdef PERFUSE_DEBUG 823 if (perfuse_diagflags & PDF_REQUEUE) 824 DPRINTF("%s: REQUEUE opc = %p, pcc = %p (%s)\n", 825 __func__, (void *)opc, pcq.pcq_cc, 826 perfuse_qtypestr[type]); 827 #endif 828 829 puffs_cc_yield(pcq.pcq_cc); 830 TAILQ_REMOVE(&pnd->pnd_pcq, &pcq, pcq_next); 831 832 #ifdef PERFUSE_DEBUG 833 if (perfuse_diagflags & PDF_REQUEUE) 834 DPRINTF("%s: RESUME opc = %p, pcc = %p (%s)\n", 835 __func__, (void *)opc, pcq.pcq_cc, 836 perfuse_qtypestr[type]); 837 #endif 838 839 return; 840 } 841 842 static int 843 dequeue_requests(puffs_cookie_t opc, enum perfuse_qtype type, int max) 844 { 845 struct perfuse_cc_queue *pcq; 846 struct perfuse_node_data *pnd; 847 int dequeued; 848 849 pnd = PERFUSE_NODE_DATA(opc); 850 dequeued = 0; 851 TAILQ_FOREACH(pcq, &pnd->pnd_pcq, pcq_next) { 852 if (pcq->pcq_type != type) 853 continue; 854 855 #ifdef PERFUSE_DEBUG 856 if (perfuse_diagflags & PDF_REQUEUE) 857 DPRINTF("%s: SCHEDULE opc = %p, pcc = %p (%s)\n", 858 __func__, (void *)opc, pcq->pcq_cc, 859 perfuse_qtypestr[type]); 860 #endif 861 puffs_cc_schedule(pcq->pcq_cc); 862 863 if (++dequeued == max) 864 break; 865 } 866 867 #ifdef PERFUSE_DEBUG 868 if (perfuse_diagflags & PDF_REQUEUE) 869 DPRINTF("%s: DONE opc = %p\n", __func__, (void *)opc); 870 #endif 871 872 return dequeued; 873 } 874 875 void 876 perfuse_fs_init(struct puffs_usermount *pu) 877 { 878 struct perfuse_state *ps; 879 perfuse_msg_t *pm; 880 struct fuse_init_in *fii; 881 struct fuse_init_out *fio; 882 int error; 883 884 ps = puffs_getspecific(pu); 885 886 if (puffs_mount(pu, ps->ps_target, ps->ps_mountflags, ps->ps_root) != 0) 887 DERR(EX_OSERR, "%s: puffs_mount failed", __func__); 888 889 /* 890 * Linux 2.6.34.1 sends theses flags: 891 * FUSE_ASYNC_READ | FUSE_POSIX_LOCKS | FUSE_ATOMIC_O_TRUNC 892 * FUSE_EXPORT_SUPPORT | FUSE_BIG_WRITES | FUSE_DONT_MASK 893 * 894 * Linux also sets max_readahead at 32 pages (128 kB) 895 * 896 * ps_new_msg() is called with NULL creds, which will 897 * be interpreted as FUSE superuser. 898 */ 899 pm = ps->ps_new_msg(pu, 0, FUSE_INIT, sizeof(*fii), NULL); 900 fii = GET_INPAYLOAD(ps, pm, fuse_init_in); 901 fii->major = FUSE_KERNEL_VERSION; 902 fii->minor = FUSE_KERNEL_MINOR_VERSION; 903 fii->max_readahead = (unsigned int)(32 * sysconf(_SC_PAGESIZE)); 904 fii->flags = (FUSE_ASYNC_READ|FUSE_POSIX_LOCKS|FUSE_ATOMIC_O_TRUNC); 905 906 if ((error = xchg_msg(pu, 0, pm, sizeof(*fio), wait_reply)) != 0) 907 DERRX(EX_SOFTWARE, "init message exchange failed (%d)", error); 908 909 fio = GET_OUTPAYLOAD(ps, pm, fuse_init_out); 910 ps->ps_max_readahead = fio->max_readahead; 911 ps->ps_max_write = fio->max_write; 912 913 ps->ps_destroy_msg(pm); 914 915 return; 916 } 917 918 int 919 perfuse_fs_unmount(struct puffs_usermount *pu, int flags) 920 { 921 perfuse_msg_t *pm; 922 struct perfuse_state *ps; 923 puffs_cookie_t opc; 924 int error; 925 926 ps = puffs_getspecific(pu); 927 opc = (puffs_cookie_t)puffs_getroot(pu); 928 929 /* 930 * ps_new_msg() is called with NULL creds, which will 931 * be interpreted as FUSE superuser. 932 */ 933 pm = ps->ps_new_msg(pu, opc, FUSE_DESTROY, 0, NULL); 934 935 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0){ 936 DWARN("unmount %s", ps->ps_target); 937 if (!(flags & MNT_FORCE)) 938 return error; 939 else 940 error = 0; 941 } else { 942 ps->ps_destroy_msg(pm); 943 } 944 945 ps->ps_umount(pu); 946 947 if (perfuse_diagflags & PDF_MISC) 948 DPRINTF("%s unmounted, exit\n", ps->ps_target); 949 950 return 0; 951 } 952 953 int 954 perfuse_fs_statvfs(struct puffs_usermount *pu, struct statvfs *svfsb) 955 { 956 struct perfuse_state *ps; 957 perfuse_msg_t *pm; 958 puffs_cookie_t opc; 959 struct fuse_statfs_out *fso; 960 int error; 961 962 ps = puffs_getspecific(pu); 963 opc = (puffs_cookie_t)puffs_getroot(pu); 964 965 /* 966 * ps_new_msg() is called with NULL creds, which will 967 * be interpreted as FUSE superuser. 968 */ 969 pm = ps->ps_new_msg(pu, opc, FUSE_STATFS, 0, NULL); 970 971 if ((error = xchg_msg(pu, opc, pm, sizeof(*fso), wait_reply)) != 0) 972 return error; 973 974 fso = GET_OUTPAYLOAD(ps, pm, fuse_statfs_out); 975 svfsb->f_flag = ps->ps_mountflags; 976 svfsb->f_bsize = fso->st.bsize; 977 svfsb->f_frsize = fso->st.frsize; 978 svfsb->f_iosize = ((struct puffs_node *)opc)->pn_va.va_blocksize; 979 svfsb->f_blocks = fso->st.blocks; 980 svfsb->f_bfree = fso->st.bfree; 981 svfsb->f_bavail = fso->st.bavail; 982 svfsb->f_bresvd = fso->st.bfree - fso->st.bavail; 983 svfsb->f_files = fso->st.files; 984 svfsb->f_ffree = fso->st.ffree; 985 svfsb->f_favail = fso->st.ffree;/* files not reserved for root */ 986 svfsb->f_fresvd = 0; /* files reserved for root */ 987 988 svfsb->f_syncreads = ps->ps_syncreads; 989 svfsb->f_syncwrites = ps->ps_syncwrites; 990 991 svfsb->f_asyncreads = ps->ps_asyncreads; 992 svfsb->f_asyncwrites = ps->ps_asyncwrites; 993 994 (void)memcpy(&svfsb->f_fsidx, &ps->ps_fsid, sizeof(ps->ps_fsid)); 995 svfsb->f_fsid = (unsigned long)ps->ps_fsid; 996 svfsb->f_namemax = MAXPATHLEN; /* XXX */ 997 svfsb->f_owner = ps->ps_owner_uid; 998 999 (void)strlcpy(svfsb->f_mntonname, ps->ps_target, _VFS_NAMELEN); 1000 1001 if (ps->ps_filesystemtype != NULL) 1002 (void)strlcpy(svfsb->f_fstypename, 1003 ps->ps_filesystemtype, _VFS_NAMELEN); 1004 else 1005 (void)strlcpy(svfsb->f_fstypename, "fuse", _VFS_NAMELEN); 1006 1007 if (ps->ps_source != NULL) 1008 strlcpy(svfsb->f_mntfromname, ps->ps_source, _VFS_NAMELEN); 1009 else 1010 strlcpy(svfsb->f_mntfromname, _PATH_FUSE, _VFS_NAMELEN); 1011 1012 ps->ps_destroy_msg(pm); 1013 1014 return 0; 1015 } 1016 1017 int 1018 perfuse_fs_sync(struct puffs_usermount *pu, int waitfor, 1019 const struct puffs_cred *pcr) 1020 { 1021 /* 1022 * FUSE does not seem to have a FS sync callback. 1023 * Maybe do not even register this callback 1024 */ 1025 return puffs_fsnop_sync(pu, waitfor, pcr); 1026 } 1027 1028 /* ARGSUSED0 */ 1029 int 1030 perfuse_fs_fhtonode(struct puffs_usermount *pu, void *fid, size_t fidsize, 1031 struct puffs_newinfo *pni) 1032 { 1033 DERRX(EX_SOFTWARE, "%s: UNIMPLEMENTED (FATAL)", __func__); 1034 return 0; 1035 } 1036 1037 /* ARGSUSED0 */ 1038 int 1039 perfuse_fs_nodetofh(struct puffs_usermount *pu, puffs_cookie_t cookie, 1040 void *fid, size_t *fidsize) 1041 { 1042 DERRX(EX_SOFTWARE, "%s: UNIMPLEMENTED (FATAL)", __func__); 1043 return 0; 1044 } 1045 1046 #if 0 1047 /* ARGSUSED0 */ 1048 void 1049 perfuse_fs_extattrctl(struct puffs_usermount *pu, int cmd, 1050 puffs_cookie_t *cookie, int flags, int namespace, const char *attrname) 1051 { 1052 DERRX(EX_SOFTWARE, "%s: UNIMPLEMENTED (FATAL)", __func__); 1053 return 0; 1054 } 1055 #endif /* 0 */ 1056 1057 /* ARGSUSED0 */ 1058 void 1059 perfuse_fs_suspend(struct puffs_usermount *pu, int status) 1060 { 1061 return; 1062 } 1063 1064 1065 int 1066 perfuse_node_lookup(struct puffs_usermount *pu, puffs_cookie_t opc, 1067 struct puffs_newinfo *pni, const struct puffs_cn *pcn) 1068 { 1069 struct perfuse_state *ps; 1070 struct puffs_node *pn; 1071 mode_t mode; 1072 int error; 1073 1074 ps = puffs_getspecific(pu); 1075 node_ref(opc); 1076 1077 /* 1078 * Check permissions 1079 */ 1080 switch(pcn->pcn_nameiop) { 1081 case NAMEI_DELETE: /* FALLTHROUGH */ 1082 case NAMEI_RENAME: /* FALLTHROUGH */ 1083 case NAMEI_CREATE: 1084 if (pcn->pcn_flags & NAMEI_ISLASTCN) 1085 mode = PUFFS_VEXEC|PUFFS_VWRITE; 1086 else 1087 mode = PUFFS_VEXEC; 1088 break; 1089 case NAMEI_LOOKUP: /* FALLTHROUGH */ 1090 default: 1091 mode = PUFFS_VEXEC; 1092 break; 1093 } 1094 1095 if ((error = mode_access(opc, pcn->pcn_cred, mode)) != 0) 1096 goto out; 1097 1098 error = node_lookup_common(pu, (puffs_cookie_t)opc, pni, 1099 pcn->pcn_name, pcn->pcn_cred, &pn); 1100 1101 if (error != 0) 1102 goto out; 1103 1104 /* 1105 * Kernel would kill us if the filesystem returned the parent 1106 * itself. If we want to live, hide that! 1107 */ 1108 if ((opc == (puffs_cookie_t)pn) && (strcmp(pcn->pcn_name, ".") != 0)) { 1109 DERRX(EX_SOFTWARE, "lookup \"%s\" in \"%s\" returned parent", 1110 pcn->pcn_name, perfuse_node_path(ps, opc)); 1111 /* NOTREACHED */ 1112 error = ESTALE; 1113 goto out; 1114 } 1115 1116 /* 1117 * Removed node 1118 */ 1119 if (PERFUSE_NODE_DATA(pn)->pnd_flags & PND_REMOVED) { 1120 error = ENOENT; 1121 goto out; 1122 } 1123 1124 /* 1125 * Check for sticky bit. Unfortunately there is no way to 1126 * do this before creating the puffs_node, since we require 1127 * this operation to get the node owner. 1128 */ 1129 switch (pcn->pcn_nameiop) { 1130 case NAMEI_DELETE: /* FALLTHROUGH */ 1131 case NAMEI_RENAME: 1132 error = sticky_access(opc, pn, pcn->pcn_cred); 1133 if (error != 0) { 1134 (void)perfuse_node_reclaim(pu, pn); 1135 goto out; 1136 } 1137 break; 1138 default: 1139 break; 1140 } 1141 1142 PERFUSE_NODE_DATA(pn)->pnd_puffs_nlookup++; 1143 1144 error = 0; 1145 1146 out: 1147 node_rele(opc); 1148 return error; 1149 } 1150 1151 int 1152 perfuse_node_create(struct puffs_usermount *pu, puffs_cookie_t opc, 1153 struct puffs_newinfo *pni, const struct puffs_cn *pcn, 1154 const struct vattr *vap) 1155 { 1156 perfuse_msg_t *pm; 1157 struct perfuse_state *ps; 1158 struct fuse_create_in *fci; 1159 struct fuse_entry_out *feo; 1160 struct fuse_open_out *foo; 1161 struct puffs_node *pn; 1162 const char *name; 1163 size_t namelen; 1164 size_t len; 1165 int error; 1166 1167 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 1168 return ENOENT; 1169 1170 node_ref(opc); 1171 1172 /* 1173 * If create is unimplemented: Check that it does not 1174 * already exists, and if not, do mknod and open 1175 */ 1176 ps = puffs_getspecific(pu); 1177 if (ps->ps_flags & PS_NO_CREAT) { 1178 error = node_lookup_common(pu, opc, NULL, pcn->pcn_name, 1179 pcn->pcn_cred, &pn); 1180 if (error == 0) { 1181 (void)perfuse_node_reclaim(pu, pn); 1182 error = EEXIST; 1183 goto out; 1184 } 1185 1186 error = perfuse_node_mknod(pu, opc, pni, pcn, vap); 1187 if (error != 0) 1188 goto out; 1189 1190 error = node_lookup_common(pu, opc, NULL, pcn->pcn_name, 1191 pcn->pcn_cred, &pn); 1192 if (error != 0) 1193 goto out; 1194 1195 /* 1196 * FUSE does the open at create time, while 1197 * NetBSD will open in a subsequent operation. 1198 * We need to open now, in order to retain FUSE 1199 * semantics. The calling process will not get 1200 * a file descriptor before the kernel sends 1201 * the open operation. 1202 */ 1203 error = perfuse_node_open(pu, (puffs_cookie_t)pn, 1204 FWRITE, pcn->pcn_cred); 1205 goto out; 1206 } 1207 1208 name = pcn->pcn_name; 1209 namelen = pcn->pcn_namelen + 1; 1210 len = sizeof(*fci) + namelen; 1211 1212 /* 1213 * flags should use O_WRONLY instead of O_RDWR, but it 1214 * breaks when the caller tries to read from file. 1215 * 1216 * mode must contain file type (ie: S_IFREG), use VTTOIF(vap->va_type) 1217 */ 1218 pm = ps->ps_new_msg(pu, opc, FUSE_CREATE, len, pcn->pcn_cred); 1219 fci = GET_INPAYLOAD(ps, pm, fuse_create_in); 1220 fci->flags = O_CREAT | O_TRUNC | O_RDWR; 1221 fci->mode = vap->va_mode | VTTOIF(vap->va_type); 1222 fci->umask = 0; /* Seems unused by libfuse */ 1223 (void)strlcpy((char*)(void *)(fci + 1), name, namelen); 1224 1225 len = sizeof(*feo) + sizeof(*foo); 1226 if ((error = xchg_msg(pu, opc, pm, len, wait_reply)) != 0) { 1227 /* 1228 * create is unimplmented, remember it for later, 1229 * and start over using mknod and open instead. 1230 */ 1231 if (error == ENOSYS) { 1232 ps->ps_flags |= PS_NO_CREAT; 1233 error = perfuse_node_create(pu, opc, pni, pcn, vap); 1234 } 1235 1236 goto out; 1237 } 1238 1239 feo = GET_OUTPAYLOAD(ps, pm, fuse_entry_out); 1240 foo = (struct fuse_open_out *)(void *)(feo + 1); 1241 if (feo->nodeid == PERFUSE_UNKNOWN_NODEID) 1242 DERRX(EX_SOFTWARE, "%s: no nodeid", __func__); 1243 1244 /* 1245 * Save the file handle and inode in node private data 1246 * so that we can reuse it later 1247 */ 1248 pn = perfuse_new_pn(pu, name, opc); 1249 perfuse_new_fh((puffs_cookie_t)pn, foo->fh, FWRITE); 1250 PERFUSE_NODE_DATA(pn)->pnd_nodeid = feo->nodeid; 1251 PERFUSE_NODE_DATA(pn)->pnd_puffs_nlookup++; 1252 perfuse_node_cache(ps, pn); 1253 1254 fuse_attr_to_vap(ps, &pn->pn_va, &feo->attr); 1255 pn->pn_va.va_gen = (u_long)(feo->generation); 1256 1257 puffs_newinfo_setcookie(pni, pn); 1258 #ifdef PUFFS_KFLAG_CACHE_FS_TTL 1259 puffs_newinfo_setva(pni, &pn->pn_va); 1260 perfuse_newinfo_setttl(pni, pn, feo, NULL); 1261 #endif /* PUFFS_KFLAG_CACHE_FS_TTL */ 1262 1263 #ifdef PERFUSE_DEBUG 1264 if (perfuse_diagflags & (PDF_FH|PDF_FILENAME)) 1265 DPRINTF("%s: opc = %p, file = \"%s\", flags = 0x%x " 1266 "nodeid = 0x%"PRIx64", wfh = 0x%"PRIx64"\n", 1267 __func__, (void *)pn, pcn->pcn_name, 1268 PERFUSE_NODE_DATA(pn)->pnd_flags, feo->nodeid, 1269 foo->fh); 1270 #endif 1271 1272 ps->ps_destroy_msg(pm); 1273 error = 0; 1274 1275 out: 1276 node_rele(opc); 1277 return error; 1278 } 1279 1280 1281 int 1282 perfuse_node_mknod(struct puffs_usermount *pu, puffs_cookie_t opc, 1283 struct puffs_newinfo *pni, const struct puffs_cn *pcn, 1284 const struct vattr *vap) 1285 { 1286 struct perfuse_state *ps; 1287 perfuse_msg_t *pm; 1288 struct fuse_mknod_in *fmi; 1289 const char* path; 1290 size_t len; 1291 int error; 1292 1293 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 1294 return ENOENT; 1295 1296 node_ref(opc); 1297 1298 /* 1299 * Only superuser can mknod objects other than 1300 * directories, files, socks, fifo and links. 1301 * 1302 * Create an object require -WX permission in the parent directory 1303 */ 1304 switch (vap->va_type) { 1305 case VDIR: /* FALLTHROUGH */ 1306 case VREG: /* FALLTHROUGH */ 1307 case VFIFO: /* FALLTHROUGH */ 1308 case VSOCK: 1309 break; 1310 default: /* VNON, VBLK, VCHR, VBAD */ 1311 if (!puffs_cred_isjuggernaut(pcn->pcn_cred)) { 1312 error = EPERM; 1313 goto out; 1314 } 1315 break; 1316 } 1317 1318 1319 ps = puffs_getspecific(pu); 1320 path = pcn->pcn_name; 1321 len = sizeof(*fmi) + pcn->pcn_namelen + 1; 1322 1323 /* 1324 * mode must contain file type (ie: S_IFREG), use VTTOIF(vap->va_type) 1325 */ 1326 pm = ps->ps_new_msg(pu, opc, FUSE_MKNOD, len, pcn->pcn_cred); 1327 fmi = GET_INPAYLOAD(ps, pm, fuse_mknod_in); 1328 fmi->mode = vap->va_mode | VTTOIF(vap->va_type); 1329 fmi->rdev = (uint32_t)vap->va_rdev; 1330 fmi->umask = 0; /* Seems unused bu libfuse */ 1331 (void)strlcpy((char *)(void *)(fmi + 1), path, len - sizeof(*fmi)); 1332 1333 error = node_mk_common(pu, opc, pni, pcn, pm); 1334 1335 out: 1336 node_rele(opc); 1337 return error; 1338 } 1339 1340 1341 int 1342 perfuse_node_open(struct puffs_usermount *pu, puffs_cookie_t opc, int mode, 1343 const struct puffs_cred *pcr) 1344 { 1345 return perfuse_node_open2(pu, opc, mode, pcr, NULL); 1346 } 1347 1348 int 1349 perfuse_node_open2(struct puffs_usermount *pu, puffs_cookie_t opc, int mode, 1350 const struct puffs_cred *pcr, int *oflags) 1351 { 1352 struct perfuse_state *ps; 1353 struct perfuse_node_data *pnd; 1354 perfuse_msg_t *pm; 1355 mode_t fmode; 1356 int op; 1357 struct fuse_open_in *foi; 1358 struct fuse_open_out *foo; 1359 struct puffs_node *pn; 1360 int error; 1361 1362 ps = puffs_getspecific(pu); 1363 pn = (struct puffs_node *)opc; 1364 pnd = PERFUSE_NODE_DATA(opc); 1365 error = 0; 1366 1367 if (pnd->pnd_flags & PND_REMOVED) 1368 return ENOENT; 1369 1370 node_ref(opc); 1371 1372 if (puffs_pn_getvap(pn)->va_type == VDIR) 1373 op = FUSE_OPENDIR; 1374 else 1375 op = FUSE_OPEN; 1376 1377 /* 1378 * libfuse docs says 1379 * - O_CREAT and O_EXCL should never be set. 1380 * - O_TRUNC may be used if mount option atomic_o_trunc is used XXX 1381 * 1382 * O_APPEND makes no sense since FUSE always sends 1383 * the file offset for write operations. If the 1384 * filesystem uses pwrite(), O_APPEND would cause 1385 * the offset to be ignored and cause file corruption. 1386 */ 1387 mode &= ~(O_CREAT|O_EXCL|O_APPEND); 1388 1389 /* 1390 * Do not open twice, and do not reopen for reading 1391 * if we already have write handle. 1392 */ 1393 switch (mode & (FREAD|FWRITE)) { 1394 case FREAD: 1395 if (pnd->pnd_flags & (PND_RFH|PND_WFH)) 1396 goto out; 1397 break; 1398 case FWRITE: 1399 if (pnd->pnd_flags & PND_WFH) 1400 goto out; 1401 break; 1402 case FREAD|FWRITE: 1403 if (pnd->pnd_flags & PND_WFH) 1404 goto out; 1405 1406 /* 1407 * Corner case: if already open for reading (PND_RFH) 1408 * and re-opening FREAD|FWRITE, we need to reopen, 1409 * but only for writing. Note the change on mode 1410 * will only affect perfuse_new_fh() 1411 */ 1412 if (pnd->pnd_flags & PND_RFH) 1413 mode &= ~FREAD; 1414 break; 1415 default: 1416 DWARNX("open without either FREAD nor FWRITE"); 1417 error = EPERM; 1418 goto out; 1419 } 1420 1421 /* 1422 * Queue open on a node so that we do not open 1423 * twice. This would be better with read and 1424 * write distinguished. 1425 */ 1426 while (pnd->pnd_flags & PND_INOPEN) 1427 requeue_request(pu, opc, PCQ_OPEN); 1428 pnd->pnd_flags |= PND_INOPEN; 1429 1430 /* 1431 * Convert PUFFS mode to FUSE mode: convert FREAD/FWRITE 1432 * to O_RDONLY/O_WRONLY while perserving the other options. 1433 */ 1434 fmode = mode & ~(FREAD|FWRITE); 1435 fmode |= (mode & FWRITE) ? O_RDWR : O_RDONLY; 1436 1437 pm = ps->ps_new_msg(pu, opc, op, sizeof(*foi), pcr); 1438 foi = GET_INPAYLOAD(ps, pm, fuse_open_in); 1439 foi->flags = fmode; 1440 foi->unused = 0; 1441 1442 if ((error = xchg_msg(pu, opc, pm, sizeof(*foo), wait_reply)) != 0) 1443 goto out; 1444 1445 foo = GET_OUTPAYLOAD(ps, pm, fuse_open_out); 1446 1447 /* 1448 * Save the file handle in node private data 1449 * so that we can reuse it later 1450 */ 1451 perfuse_new_fh(opc, foo->fh, mode); 1452 1453 /* 1454 * Set direct I/O if the filesystems forces it 1455 */ 1456 if ((foo->open_flags & FUSE_FOPEN_DIRECT_IO) && (oflags != NULL)) 1457 *oflags |= PUFFS_OPEN_IO_DIRECT; 1458 1459 #ifdef PERFUSE_DEBUG 1460 if (perfuse_diagflags & (PDF_FH|PDF_FILENAME)) 1461 DPRINTF("%s: opc = %p, file = \"%s\", " 1462 "nodeid = 0x%"PRIx64", %s%sfh = 0x%"PRIx64"\n", 1463 __func__, (void *)opc, perfuse_node_path(ps, opc), 1464 pnd->pnd_nodeid, mode & FREAD ? "r" : "", 1465 mode & FWRITE ? "w" : "", foo->fh); 1466 #endif 1467 1468 ps->ps_destroy_msg(pm); 1469 out: 1470 1471 pnd->pnd_flags &= ~PND_INOPEN; 1472 (void)dequeue_requests(opc, PCQ_OPEN, DEQUEUE_ALL); 1473 1474 node_rele(opc); 1475 return error; 1476 } 1477 1478 /* ARGSUSED0 */ 1479 int 1480 perfuse_node_close(struct puffs_usermount *pu, puffs_cookie_t opc, int flags, 1481 const struct puffs_cred *pcr) 1482 { 1483 struct perfuse_node_data *pnd; 1484 1485 pnd = PERFUSE_NODE_DATA(opc); 1486 1487 if (!(pnd->pnd_flags & PND_OPEN)) 1488 return EBADF; 1489 1490 /* 1491 * Actual close is postponed at inactive time. 1492 */ 1493 return 0; 1494 } 1495 1496 int 1497 perfuse_node_access(struct puffs_usermount *pu, puffs_cookie_t opc, int mode, 1498 const struct puffs_cred *pcr) 1499 { 1500 perfuse_msg_t *pm; 1501 struct perfuse_state *ps; 1502 struct fuse_access_in *fai; 1503 int error; 1504 1505 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 1506 return ENOENT; 1507 1508 node_ref(opc); 1509 1510 /* 1511 * If we previously detected the filesystem does not 1512 * implement access(), short-circuit the call and skip 1513 * to libpuffs access() emulation. 1514 */ 1515 ps = puffs_getspecific(pu); 1516 if (ps->ps_flags & PS_NO_ACCESS) { 1517 const struct vattr *vap; 1518 1519 vap = puffs_pn_getvap((struct puffs_node *)opc); 1520 1521 error = puffs_access(IFTOVT(vap->va_mode), 1522 vap->va_mode & ACCESSPERMS, 1523 vap->va_uid, vap->va_gid, 1524 (mode_t)mode, pcr); 1525 goto out; 1526 } 1527 1528 /* 1529 * Plain access call 1530 */ 1531 pm = ps->ps_new_msg(pu, opc, FUSE_ACCESS, sizeof(*fai), pcr); 1532 fai = GET_INPAYLOAD(ps, pm, fuse_access_in); 1533 fai->mask = 0; 1534 fai->mask |= (mode & PUFFS_VREAD) ? R_OK : 0; 1535 fai->mask |= (mode & PUFFS_VWRITE) ? W_OK : 0; 1536 fai->mask |= (mode & PUFFS_VEXEC) ? X_OK : 0; 1537 1538 error = xchg_msg(pu, opc, pm, NO_PAYLOAD_REPLY_LEN, wait_reply); 1539 1540 ps->ps_destroy_msg(pm); 1541 1542 /* 1543 * If unimplemented, start over with emulation 1544 */ 1545 if (error == ENOSYS) { 1546 ps->ps_flags |= PS_NO_ACCESS; 1547 error = perfuse_node_access(pu, opc, mode, pcr); 1548 } 1549 1550 out: 1551 node_rele(opc); 1552 return error; 1553 } 1554 1555 int 1556 perfuse_node_getattr(struct puffs_usermount *pu, puffs_cookie_t opc, 1557 struct vattr *vap, const struct puffs_cred *pcr) 1558 { 1559 return perfuse_node_getattr_ttl(pu, opc, vap, pcr, NULL); 1560 } 1561 1562 int 1563 perfuse_node_getattr_ttl(struct puffs_usermount *pu, puffs_cookie_t opc, 1564 struct vattr *vap, const struct puffs_cred *pcr, 1565 struct timespec *va_ttl) 1566 { 1567 perfuse_msg_t *pm = NULL; 1568 struct perfuse_state *ps; 1569 struct perfuse_node_data *pnd = PERFUSE_NODE_DATA(opc); 1570 struct fuse_getattr_in *fgi; 1571 struct fuse_attr_out *fao; 1572 int error = 0; 1573 1574 if ((pnd->pnd_flags & PND_REMOVED) && !(pnd->pnd_flags & PND_OPEN)) 1575 return ENOENT; 1576 1577 node_ref(opc); 1578 1579 /* 1580 * Serialize size access, see comment in perfuse_node_setattr(). 1581 */ 1582 while (pnd->pnd_flags & PND_INRESIZE) 1583 requeue_request(pu, opc, PCQ_RESIZE); 1584 pnd->pnd_flags |= PND_INRESIZE; 1585 1586 ps = puffs_getspecific(pu); 1587 1588 /* 1589 * FUSE_GETATTR_FH must be set in fgi->flags 1590 * if we use for fgi->fh 1591 */ 1592 pm = ps->ps_new_msg(pu, opc, FUSE_GETATTR, sizeof(*fgi), pcr); 1593 fgi = GET_INPAYLOAD(ps, pm, fuse_getattr_in); 1594 fgi->getattr_flags = 0; 1595 fgi->dummy = 0; 1596 fgi->fh = 0; 1597 1598 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_OPEN) { 1599 fgi->fh = perfuse_get_fh(opc, FREAD); 1600 fgi->getattr_flags |= FUSE_GETATTR_FH; 1601 } 1602 1603 #ifdef PERFUSE_DEBUG 1604 if (perfuse_diagflags & PDF_RESIZE) 1605 DPRINTF(">> %s %p %" PRIu64 "\n", __func__, (void *)opc, 1606 vap->va_size); 1607 #endif 1608 1609 if ((error = xchg_msg(pu, opc, pm, sizeof(*fao), wait_reply)) != 0) 1610 goto out; 1611 1612 fao = GET_OUTPAYLOAD(ps, pm, fuse_attr_out); 1613 1614 #ifdef PERFUSE_DEBUG 1615 if (perfuse_diagflags & PDF_RESIZE) 1616 DPRINTF("<< %s %p %" PRIu64 " -> %" PRIu64 "\n", __func__, 1617 (void *)opc, vap->va_size, fao->attr.size); 1618 #endif 1619 1620 /* 1621 * We set birthtime, flags, filerev,vaflags to 0. 1622 * This seems the best bet, since the information is 1623 * not available from filesystem. 1624 */ 1625 fuse_attr_to_vap(ps, vap, &fao->attr); 1626 1627 if (va_ttl != NULL) { 1628 va_ttl->tv_sec = fao->attr_valid; 1629 va_ttl->tv_nsec = fao->attr_valid_nsec; 1630 } 1631 1632 ps->ps_destroy_msg(pm); 1633 error = 0; 1634 out: 1635 1636 pnd->pnd_flags &= ~PND_INRESIZE; 1637 (void)dequeue_requests(opc, PCQ_RESIZE, DEQUEUE_ALL); 1638 1639 node_rele(opc); 1640 return error; 1641 } 1642 1643 int 1644 perfuse_node_setattr(struct puffs_usermount *pu, puffs_cookie_t opc, 1645 const struct vattr *vap, const struct puffs_cred *pcr) 1646 { 1647 return perfuse_node_setattr_ttl(pu, opc, 1648 __UNCONST(vap), pcr, NULL, 0); 1649 } 1650 1651 int 1652 perfuse_node_setattr_ttl(struct puffs_usermount *pu, puffs_cookie_t opc, 1653 struct vattr *vap, const struct puffs_cred *pcr, 1654 struct timespec *va_ttl, int xflag) 1655 { 1656 perfuse_msg_t *pm; 1657 uint64_t fh; 1658 struct perfuse_state *ps; 1659 struct perfuse_node_data *pnd; 1660 struct fuse_setattr_in *fsi; 1661 struct fuse_attr_out *fao; 1662 struct vattr *old_va; 1663 enum perfuse_xchg_pb_reply reply; 1664 int error; 1665 #ifdef PERFUSE_DEBUG 1666 struct vattr *old_vap; 1667 int resize_debug = 0; 1668 #endif 1669 ps = puffs_getspecific(pu); 1670 pnd = PERFUSE_NODE_DATA(opc); 1671 1672 /* 1673 * The only operation we can do once the file is removed 1674 * is to resize it, and we can do it only if it is open. 1675 * Do not even send the operation to the filesystem: the 1676 * file is not there anymore. 1677 */ 1678 if (pnd->pnd_flags & PND_REMOVED) { 1679 if (!(pnd->pnd_flags & PND_OPEN)) 1680 return ENOENT; 1681 1682 return 0; 1683 } 1684 1685 old_va = puffs_pn_getvap((struct puffs_node *)opc); 1686 1687 /* 1688 * Check for permission to change size 1689 * It is always allowed if we already have a write file handle 1690 */ 1691 if ((vap->va_size != (u_quad_t)PUFFS_VNOVAL) && 1692 !(pnd->pnd_flags & PND_WFH) && 1693 (error = mode_access(opc, pcr, PUFFS_VWRITE)) != 0) 1694 return error; 1695 1696 /* 1697 * Check for permission to change dates 1698 */ 1699 if (((vap->va_atime.tv_sec != (time_t)PUFFS_VNOVAL) || 1700 (vap->va_mtime.tv_sec != (time_t)PUFFS_VNOVAL)) && 1701 (puffs_access_times(old_va->va_uid, old_va->va_gid, 1702 old_va->va_mode, 0, pcr) != 0)) 1703 return EPERM; 1704 1705 /* 1706 * Check for permission to change owner and group 1707 */ 1708 if (((vap->va_uid != (uid_t)PUFFS_VNOVAL) || 1709 (vap->va_gid != (gid_t)PUFFS_VNOVAL)) && 1710 (puffs_access_chown(old_va->va_uid, old_va->va_gid, 1711 vap->va_uid, vap->va_gid, pcr)) != 0) 1712 return EPERM; 1713 1714 /* 1715 * Check for sticky bit on non-directory by non root user 1716 */ 1717 if ((vap->va_mode != (mode_t)PUFFS_VNOVAL) && 1718 (vap->va_mode & S_ISTXT) && (old_va->va_type != VDIR) && 1719 !puffs_cred_isjuggernaut(pcr)) 1720 return EFTYPE; 1721 1722 /* 1723 * Check for permission to change permissions 1724 */ 1725 if ((vap->va_mode != (mode_t)PUFFS_VNOVAL) && 1726 (puffs_access_chmod(old_va->va_uid, old_va->va_gid, 1727 old_va->va_type, vap->va_mode, pcr)) != 0) 1728 return EPERM; 1729 1730 node_ref(opc); 1731 1732 if (pnd->pnd_flags & PND_WFH) 1733 fh = perfuse_get_fh(opc, FWRITE); 1734 else 1735 fh = FUSE_UNKNOWN_FH; 1736 1737 /* 1738 * fchmod() sets mode and fh, and it may carry 1739 * a resize as well. That may break if the 1740 * filesystem does chmod then resize, and fails 1741 * because it does not have permission anymore. 1742 * We work this around by splitting into two setattr. 1743 */ 1744 if ((vap->va_size != (u_quad_t)PUFFS_VNOVAL) && 1745 (vap->va_mode != (mode_t)PUFFS_VNOVAL) && 1746 (fh != FUSE_UNKNOWN_FH)) { 1747 struct vattr resize_va; 1748 1749 (void)memcpy(&resize_va, vap, sizeof(resize_va)); 1750 resize_va.va_mode = (mode_t)PUFFS_VNOVAL; 1751 if ((error = perfuse_node_setattr_ttl(pu, opc, &resize_va, 1752 pcr, va_ttl, xflag)) != 0) 1753 goto out2; 1754 1755 vap->va_size = (u_quad_t)PUFFS_VNOVAL; 1756 } 1757 1758 pm = ps->ps_new_msg(pu, opc, FUSE_SETATTR, sizeof(*fsi), pcr); 1759 fsi = GET_INPAYLOAD(ps, pm, fuse_setattr_in); 1760 fsi->valid = 0; 1761 1762 /* 1763 * Get a fh if the node is open for writing 1764 */ 1765 if (fh != FUSE_UNKNOWN_FH) { 1766 fsi->fh = fh; 1767 fsi->valid |= FUSE_FATTR_FH; 1768 } 1769 1770 1771 if (vap->va_size != (u_quad_t)PUFFS_VNOVAL) { 1772 fsi->size = vap->va_size; 1773 fsi->valid |= FUSE_FATTR_SIZE; 1774 1775 /* 1776 * Serialize anything that can touch file size 1777 * to avoid reordered GETATTR and SETATTR. 1778 * Out of order SETATTR can report stale size, 1779 * which will cause the kernel to truncate the file. 1780 * XXX Probably useless now we have a lock on GETATTR 1781 */ 1782 while (pnd->pnd_flags & PND_INRESIZE) 1783 requeue_request(pu, opc, PCQ_RESIZE); 1784 pnd->pnd_flags |= PND_INRESIZE; 1785 } 1786 1787 /* 1788 * Setting mtime without atime or vice versa leads to 1789 * dates being reset to Epoch on glusterfs. If one 1790 * is missing, use the old value. 1791 */ 1792 if ((vap->va_mtime.tv_sec != (time_t)PUFFS_VNOVAL) || 1793 (vap->va_atime.tv_sec != (time_t)PUFFS_VNOVAL)) { 1794 1795 if (vap->va_atime.tv_sec != (time_t)PUFFS_VNOVAL) { 1796 fsi->atime = vap->va_atime.tv_sec; 1797 fsi->atimensec = (uint32_t)vap->va_atime.tv_nsec; 1798 } else { 1799 fsi->atime = old_va->va_atime.tv_sec; 1800 fsi->atimensec = (uint32_t)old_va->va_atime.tv_nsec; 1801 } 1802 1803 if (vap->va_mtime.tv_sec != (time_t)PUFFS_VNOVAL) { 1804 fsi->mtime = vap->va_mtime.tv_sec; 1805 fsi->mtimensec = (uint32_t)vap->va_mtime.tv_nsec; 1806 } else { 1807 fsi->mtime = old_va->va_mtime.tv_sec; 1808 fsi->mtimensec = (uint32_t)old_va->va_mtime.tv_nsec; 1809 } 1810 1811 fsi->valid |= (FUSE_FATTR_MTIME|FUSE_FATTR_ATIME); 1812 } 1813 1814 if (vap->va_mode != (mode_t)PUFFS_VNOVAL) { 1815 fsi->mode = vap->va_mode; 1816 fsi->valid |= FUSE_FATTR_MODE; 1817 } 1818 1819 if (vap->va_uid != (uid_t)PUFFS_VNOVAL) { 1820 fsi->uid = vap->va_uid; 1821 fsi->valid |= FUSE_FATTR_UID; 1822 } 1823 1824 if (vap->va_gid != (gid_t)PUFFS_VNOVAL) { 1825 fsi->gid = vap->va_gid; 1826 fsi->valid |= FUSE_FATTR_GID; 1827 } 1828 1829 if (pnd->pnd_lock_owner != 0) { 1830 fsi->lock_owner = pnd->pnd_lock_owner; 1831 fsi->valid |= FUSE_FATTR_LOCKOWNER; 1832 } 1833 1834 /* 1835 * ftruncate() sends only va_size, and metadata cache 1836 * flush adds va_atime and va_mtime. Some FUSE 1837 * filesystems will attempt to detect ftruncate by 1838 * checking for FATTR_SIZE being set without 1839 * FATTR_UID|FATTR_GID|FATTR_ATIME|FATTR_MTIME|FATTR_MODE 1840 * 1841 * Try to adapt and remove FATTR_ATIME|FATTR_MTIME 1842 * if we suspect a ftruncate(). 1843 */ 1844 if ((vap->va_size != (u_quad_t)PUFFS_VNOVAL) && 1845 ((vap->va_mode == (mode_t)PUFFS_VNOVAL) && 1846 (vap->va_uid == (uid_t)PUFFS_VNOVAL) && 1847 (vap->va_gid == (gid_t)PUFFS_VNOVAL))) { 1848 fsi->atime = 0; 1849 fsi->atimensec = 0; 1850 fsi->mtime = 0; 1851 fsi->mtimensec = 0; 1852 fsi->valid &= ~(FUSE_FATTR_ATIME|FUSE_FATTR_MTIME); 1853 } 1854 1855 /* 1856 * If nothing remain, discard the operation. 1857 */ 1858 if (!(fsi->valid & (FUSE_FATTR_SIZE|FUSE_FATTR_ATIME|FUSE_FATTR_MTIME| 1859 FUSE_FATTR_MODE|FUSE_FATTR_UID|FUSE_FATTR_GID))) { 1860 error = 0; 1861 ps->ps_destroy_msg(pm); 1862 goto out; 1863 } 1864 1865 #ifdef PERFUSE_DEBUG 1866 old_vap = puffs_pn_getvap((struct puffs_node *)opc); 1867 1868 if ((perfuse_diagflags & PDF_RESIZE) && 1869 (old_vap->va_size != (u_quad_t)PUFFS_VNOVAL)) { 1870 resize_debug = 1; 1871 1872 DPRINTF(">> %s %p %" PRIu64 " -> %" PRIu64 "\n", __func__, 1873 (void *)opc, 1874 puffs_pn_getvap((struct puffs_node *)opc)->va_size, 1875 fsi->size); 1876 } 1877 #endif 1878 1879 /* 1880 * Do not honour FAF when changing size. How do 1881 * you want such a thing to work? 1882 */ 1883 reply = wait_reply; 1884 #ifdef PUFFS_SETATTR_FAF 1885 if ((xflag & PUFFS_SETATTR_FAF) && !(fsi->valid & FUSE_FATTR_SIZE)) 1886 reply = no_reply; 1887 #endif 1888 if ((error = xchg_msg(pu, opc, pm, sizeof(*fao), reply)) != 0) 1889 goto out; 1890 1891 if (reply == no_reply) 1892 goto out; 1893 1894 /* 1895 * Copy back the new values 1896 */ 1897 fao = GET_OUTPAYLOAD(ps, pm, fuse_attr_out); 1898 1899 #ifdef PERFUSE_DEBUG 1900 if (resize_debug) 1901 DPRINTF("<< %s %p %" PRIu64 " -> %" PRIu64 "\n", __func__, 1902 (void *)opc, old_vap->va_size, fao->attr.size); 1903 #endif 1904 1905 fuse_attr_to_vap(ps, old_va, &fao->attr); 1906 1907 if (va_ttl != NULL) { 1908 va_ttl->tv_sec = fao->attr_valid; 1909 va_ttl->tv_nsec = fao->attr_valid_nsec; 1910 (void)memcpy(vap, old_va, sizeof(*vap)); 1911 } 1912 1913 ps->ps_destroy_msg(pm); 1914 error = 0; 1915 1916 out: 1917 if (pnd->pnd_flags & PND_INRESIZE) { 1918 pnd->pnd_flags &= ~PND_INRESIZE; 1919 (void)dequeue_requests(opc, PCQ_RESIZE, DEQUEUE_ALL); 1920 } 1921 1922 out2: 1923 node_rele(opc); 1924 return error; 1925 } 1926 1927 int 1928 perfuse_node_poll(struct puffs_usermount *pu, puffs_cookie_t opc, int *events) 1929 { 1930 struct perfuse_state *ps; 1931 perfuse_msg_t *pm; 1932 struct fuse_poll_in *fpi; 1933 struct fuse_poll_out *fpo; 1934 int error; 1935 1936 node_ref(opc); 1937 ps = puffs_getspecific(pu); 1938 /* 1939 * kh is set if FUSE_POLL_SCHEDULE_NOTIFY is set. 1940 * 1941 * XXX ps_new_msg() is called with NULL creds, which will 1942 * be interpreted as FUSE superuser. We have no way to 1943 * know the requesting process' credential, but since poll 1944 * is supposed to operate on a file that has been open, 1945 * permission should have already been checked at open time. 1946 * That still may breaks on filesystems that provides odd 1947 * semantics. 1948 */ 1949 pm = ps->ps_new_msg(pu, opc, FUSE_POLL, sizeof(*fpi), NULL); 1950 fpi = GET_INPAYLOAD(ps, pm, fuse_poll_in); 1951 fpi->fh = perfuse_get_fh(opc, FREAD); 1952 fpi->kh = 0; 1953 fpi->flags = 0; 1954 1955 #ifdef PERFUSE_DEBUG 1956 if (perfuse_diagflags & PDF_FH) 1957 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", " 1958 "fh = 0x%"PRIx64"\n", __func__, (void *)opc, 1959 PERFUSE_NODE_DATA(opc)->pnd_nodeid, fpi->fh); 1960 #endif 1961 if ((error = xchg_msg(pu, opc, pm, sizeof(*fpo), wait_reply)) != 0) 1962 goto out; 1963 1964 fpo = GET_OUTPAYLOAD(ps, pm, fuse_poll_out); 1965 *events = fpo->revents; 1966 1967 ps->ps_destroy_msg(pm); 1968 error = 0; 1969 1970 out: 1971 node_rele(opc); 1972 return error; 1973 } 1974 1975 /* ARGSUSED2 */ 1976 int 1977 perfuse_node_fsync(struct puffs_usermount *pu, puffs_cookie_t opc, 1978 const struct puffs_cred *pcr, int flags, off_t offlo, off_t offhi) 1979 { 1980 int op; 1981 perfuse_msg_t *pm; 1982 struct perfuse_state *ps; 1983 struct perfuse_node_data *pnd; 1984 struct fuse_fsync_in *ffi; 1985 uint64_t fh; 1986 int error = 0; 1987 1988 pm = NULL; 1989 ps = puffs_getspecific(pu); 1990 pnd = PERFUSE_NODE_DATA(opc); 1991 1992 /* 1993 * No need to sync a removed node 1994 */ 1995 if (pnd->pnd_flags & PND_REMOVED) 1996 return 0; 1997 1998 /* 1999 * We do not sync closed files. They have been 2000 * sync at inactive time already. 2001 */ 2002 if (!(pnd->pnd_flags & PND_OPEN)) 2003 return 0; 2004 2005 node_ref(opc); 2006 2007 if (puffs_pn_getvap((struct puffs_node *)opc)->va_type == VDIR) 2008 op = FUSE_FSYNCDIR; 2009 else /* VREG but also other types such as VLNK */ 2010 op = FUSE_FSYNC; 2011 2012 /* 2013 * Do not sync if there are no change to sync 2014 * XXX remove that test on files if we implement mmap 2015 */ 2016 #ifdef PERFUSE_DEBUG 2017 if (perfuse_diagflags & PDF_SYNC) 2018 DPRINTF("%s: TEST opc = %p, file = \"%s\" is %sdirty\n", 2019 __func__, (void*)opc, perfuse_node_path(ps, opc), 2020 pnd->pnd_flags & PND_DIRTY ? "" : "not "); 2021 #endif 2022 if (!(pnd->pnd_flags & PND_DIRTY)) 2023 goto out; 2024 2025 /* 2026 * It seems NetBSD can call fsync without open first 2027 * glusterfs complain in such a situation: 2028 * "FSYNC() ERR => -1 (Invalid argument)" 2029 * The file will be closed at inactive time. 2030 * 2031 * We open the directory for reading in order to sync. 2032 * This sounds rather counterintuitive, but it works. 2033 */ 2034 if (!(pnd->pnd_flags & PND_WFH)) { 2035 if ((error = perfuse_node_open(pu, opc, FREAD, pcr)) != 0) 2036 goto out; 2037 } 2038 2039 if (op == FUSE_FSYNCDIR) 2040 fh = perfuse_get_fh(opc, FREAD); 2041 else 2042 fh = perfuse_get_fh(opc, FWRITE); 2043 2044 /* 2045 * If fsync_flags is set, meta data should not be flushed. 2046 */ 2047 pm = ps->ps_new_msg(pu, opc, op, sizeof(*ffi), pcr); 2048 ffi = GET_INPAYLOAD(ps, pm, fuse_fsync_in); 2049 ffi->fh = fh; 2050 ffi->fsync_flags = (flags & FFILESYNC) ? 0 : 1; 2051 2052 #ifdef PERFUSE_DEBUG 2053 if (perfuse_diagflags & PDF_FH) 2054 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", fh = 0x%"PRIx64"\n", 2055 __func__, (void *)opc, 2056 PERFUSE_NODE_DATA(opc)->pnd_nodeid, ffi->fh); 2057 #endif 2058 2059 if ((error = xchg_msg(pu, opc, pm, 2060 NO_PAYLOAD_REPLY_LEN, wait_reply)) != 0) 2061 goto out; 2062 2063 /* 2064 * No reply beyond fuse_out_header: nothing to do on success 2065 * just clear the dirty flag 2066 */ 2067 pnd->pnd_flags &= ~PND_DIRTY; 2068 2069 #ifdef PERFUSE_DEBUG 2070 if (perfuse_diagflags & PDF_SYNC) 2071 DPRINTF("%s: CLEAR opc = %p, file = \"%s\"\n", 2072 __func__, (void*)opc, perfuse_node_path(ps, opc)); 2073 #endif 2074 2075 ps->ps_destroy_msg(pm); 2076 error = 0; 2077 2078 out: 2079 /* 2080 * ENOSYS is not returned to kernel, 2081 */ 2082 if (error == ENOSYS) 2083 error = 0; 2084 2085 node_rele(opc); 2086 return error; 2087 } 2088 2089 int 2090 perfuse_node_remove(struct puffs_usermount *pu, puffs_cookie_t opc, 2091 puffs_cookie_t targ, const struct puffs_cn *pcn) 2092 { 2093 struct perfuse_state *ps; 2094 struct perfuse_node_data *pnd; 2095 perfuse_msg_t *pm; 2096 char *path; 2097 const char *name; 2098 size_t len; 2099 int error; 2100 2101 pnd = PERFUSE_NODE_DATA(opc); 2102 2103 if ((pnd->pnd_flags & PND_REMOVED) || 2104 (PERFUSE_NODE_DATA(targ)->pnd_flags & PND_REMOVED)) 2105 return ENOENT; 2106 2107 #ifdef PERFUSE_DEBUG 2108 if (targ == NULL) 2109 DERRX(EX_SOFTWARE, "%s: targ is NULL", __func__); 2110 2111 if (perfuse_diagflags & (PDF_FH|PDF_FILENAME)) 2112 DPRINTF("%s: opc = %p, remove opc = %p, file = \"%s\"\n", 2113 __func__, (void *)opc, (void *)targ, pcn->pcn_name); 2114 #endif 2115 node_ref(opc); 2116 node_ref(targ); 2117 2118 /* 2119 * Await for all operations on the deleted node to drain, 2120 * as the filesystem may be confused to have it deleted 2121 * during a getattr 2122 */ 2123 while (PERFUSE_NODE_DATA(targ)->pnd_inxchg) 2124 requeue_request(pu, targ, PCQ_AFTERXCHG); 2125 2126 ps = puffs_getspecific(pu); 2127 pnd = PERFUSE_NODE_DATA(opc); 2128 name = pcn->pcn_name; 2129 len = pcn->pcn_namelen + 1; 2130 2131 pm = ps->ps_new_msg(pu, opc, FUSE_UNLINK, len, pcn->pcn_cred); 2132 path = _GET_INPAYLOAD(ps, pm, char *); 2133 (void)strlcpy(path, name, len); 2134 2135 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 2136 goto out; 2137 2138 perfuse_cache_flush(targ); 2139 PERFUSE_NODE_DATA(targ)->pnd_flags |= PND_REMOVED; 2140 2141 if (!(PERFUSE_NODE_DATA(targ)->pnd_flags & PND_OPEN)) 2142 puffs_setback(puffs_cc_getcc(pu), PUFFS_SETBACK_NOREF_N2); 2143 2144 /* 2145 * The parent directory needs a sync 2146 */ 2147 PERFUSE_NODE_DATA(opc)->pnd_flags |= PND_DIRTY; 2148 2149 #ifdef PERFUSE_DEBUG 2150 if (perfuse_diagflags & PDF_FILENAME) 2151 DPRINTF("%s: remove nodeid = 0x%"PRIx64" file = \"%s\"\n", 2152 __func__, PERFUSE_NODE_DATA(targ)->pnd_nodeid, 2153 pcn->pcn_name); 2154 #endif 2155 ps->ps_destroy_msg(pm); 2156 error = 0; 2157 2158 out: 2159 node_rele(opc); 2160 node_rele(targ); 2161 return error; 2162 } 2163 2164 int 2165 perfuse_node_link(struct puffs_usermount *pu, puffs_cookie_t opc, 2166 puffs_cookie_t targ, const struct puffs_cn *pcn) 2167 { 2168 struct perfuse_state *ps; 2169 perfuse_msg_t *pm; 2170 const char *name; 2171 size_t len; 2172 struct puffs_node *pn; 2173 struct fuse_link_in *fli; 2174 int error; 2175 2176 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 2177 return ENOENT; 2178 2179 node_ref(opc); 2180 node_ref(targ); 2181 ps = puffs_getspecific(pu); 2182 pn = (struct puffs_node *)targ; 2183 name = pcn->pcn_name; 2184 len = sizeof(*fli) + pcn->pcn_namelen + 1; 2185 2186 pm = ps->ps_new_msg(pu, opc, FUSE_LINK, len, pcn->pcn_cred); 2187 fli = GET_INPAYLOAD(ps, pm, fuse_link_in); 2188 fli->oldnodeid = PERFUSE_NODE_DATA(pn)->pnd_nodeid; 2189 (void)strlcpy((char *)(void *)(fli + 1), name, len - sizeof(*fli)); 2190 2191 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 2192 goto out; 2193 2194 ps->ps_destroy_msg(pm); 2195 error = 0; 2196 2197 out: 2198 node_rele(opc); 2199 node_rele(targ); 2200 return error; 2201 } 2202 2203 int 2204 perfuse_node_rename(struct puffs_usermount *pu, puffs_cookie_t opc, 2205 puffs_cookie_t src, const struct puffs_cn *pcn_src, 2206 puffs_cookie_t targ_dir, puffs_cookie_t targ, 2207 const struct puffs_cn *pcn_targ) 2208 { 2209 struct perfuse_state *ps; 2210 struct perfuse_node_data *dstdir_pnd; 2211 perfuse_msg_t *pm; 2212 struct fuse_rename_in *fri; 2213 const char *newname; 2214 const char *oldname; 2215 char *np; 2216 int error; 2217 size_t len; 2218 size_t newname_len; 2219 size_t oldname_len; 2220 2221 if ((PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) || 2222 (PERFUSE_NODE_DATA(src)->pnd_flags & PND_REMOVED) || 2223 (PERFUSE_NODE_DATA(targ_dir)->pnd_flags & PND_REMOVED)) 2224 return ENOENT; 2225 2226 node_ref(opc); 2227 node_ref(src); 2228 2229 /* 2230 * Await for all operations on the deleted node to drain, 2231 * as the filesystem may be confused to have it deleted 2232 * during a getattr 2233 */ 2234 if ((struct puffs_node *)targ != NULL) { 2235 node_ref(targ); 2236 while (PERFUSE_NODE_DATA(targ)->pnd_inxchg) 2237 requeue_request(pu, targ, PCQ_AFTERXCHG); 2238 } else { 2239 while (PERFUSE_NODE_DATA(src)->pnd_inxchg) 2240 requeue_request(pu, src, PCQ_AFTERXCHG); 2241 } 2242 2243 ps = puffs_getspecific(pu); 2244 newname = pcn_targ->pcn_name; 2245 newname_len = pcn_targ->pcn_namelen + 1; 2246 oldname = pcn_src->pcn_name; 2247 oldname_len = pcn_src->pcn_namelen + 1; 2248 2249 len = sizeof(*fri) + oldname_len + newname_len; 2250 pm = ps->ps_new_msg(pu, opc, FUSE_RENAME, len, pcn_targ->pcn_cred); 2251 fri = GET_INPAYLOAD(ps, pm, fuse_rename_in); 2252 fri->newdir = PERFUSE_NODE_DATA(targ_dir)->pnd_nodeid; 2253 np = (char *)(void *)(fri + 1); 2254 (void)strlcpy(np, oldname, oldname_len); 2255 np += oldname_len; 2256 (void)strlcpy(np, newname, newname_len); 2257 2258 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 2259 goto out; 2260 2261 2262 /* 2263 * Record new parent nodeid 2264 */ 2265 dstdir_pnd = PERFUSE_NODE_DATA(targ_dir); 2266 PERFUSE_NODE_DATA(src)->pnd_parent_nodeid = dstdir_pnd->pnd_nodeid; 2267 2268 if (opc != targ_dir) 2269 dstdir_pnd->pnd_flags |= PND_DIRTY; 2270 2271 if (strcmp(newname, "..") != 0) 2272 (void)strlcpy(PERFUSE_NODE_DATA(src)->pnd_name, 2273 newname, MAXPATHLEN); 2274 else 2275 PERFUSE_NODE_DATA(src)->pnd_name[0] = 0; /* forget name */ 2276 2277 PERFUSE_NODE_DATA(opc)->pnd_flags |= PND_DIRTY; 2278 2279 if ((struct puffs_node *)targ != NULL) { 2280 perfuse_cache_flush(targ); 2281 PERFUSE_NODE_DATA(targ)->pnd_flags |= PND_REMOVED; 2282 } 2283 2284 #ifdef PERFUSE_DEBUG 2285 if (perfuse_diagflags & PDF_FILENAME) 2286 DPRINTF("%s: nodeid = 0x%"PRIx64" file = \"%s\" renamed \"%s\" " 2287 "nodeid = 0x%"PRIx64" -> nodeid = 0x%"PRIx64" \"%s\"\n", 2288 __func__, PERFUSE_NODE_DATA(src)->pnd_nodeid, 2289 pcn_src->pcn_name, pcn_targ->pcn_name, 2290 PERFUSE_NODE_DATA(opc)->pnd_nodeid, 2291 PERFUSE_NODE_DATA(targ_dir)->pnd_nodeid, 2292 perfuse_node_path(ps, targ_dir)); 2293 #endif 2294 2295 ps->ps_destroy_msg(pm); 2296 error = 0; 2297 2298 out: 2299 node_rele(opc); 2300 node_rele(src); 2301 if ((struct puffs_node *)targ != NULL) 2302 node_rele(targ); 2303 2304 return error; 2305 } 2306 2307 int 2308 perfuse_node_mkdir(struct puffs_usermount *pu, puffs_cookie_t opc, 2309 struct puffs_newinfo *pni, const struct puffs_cn *pcn, 2310 const struct vattr *vap) 2311 { 2312 struct perfuse_state *ps; 2313 perfuse_msg_t *pm; 2314 struct fuse_mkdir_in *fmi; 2315 const char *path; 2316 size_t len; 2317 int error; 2318 2319 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 2320 return ENOENT; 2321 2322 node_ref(opc); 2323 ps = puffs_getspecific(pu); 2324 path = pcn->pcn_name; 2325 len = sizeof(*fmi) + pcn->pcn_namelen + 1; 2326 2327 pm = ps->ps_new_msg(pu, opc, FUSE_MKDIR, len, pcn->pcn_cred); 2328 fmi = GET_INPAYLOAD(ps, pm, fuse_mkdir_in); 2329 fmi->mode = vap->va_mode; 2330 fmi->umask = 0; /* Seems unused by libfuse? */ 2331 (void)strlcpy((char *)(void *)(fmi + 1), path, len - sizeof(*fmi)); 2332 2333 error = node_mk_common(pu, opc, pni, pcn, pm); 2334 2335 node_rele(opc); 2336 return error; 2337 } 2338 2339 2340 int 2341 perfuse_node_rmdir(struct puffs_usermount *pu, puffs_cookie_t opc, 2342 puffs_cookie_t targ, const struct puffs_cn *pcn) 2343 { 2344 struct perfuse_state *ps; 2345 struct perfuse_node_data *pnd; 2346 perfuse_msg_t *pm; 2347 char *path; 2348 const char *name; 2349 size_t len; 2350 int error; 2351 2352 pnd = PERFUSE_NODE_DATA(opc); 2353 2354 if ((pnd->pnd_flags & PND_REMOVED) || 2355 (PERFUSE_NODE_DATA(targ)->pnd_flags & PND_REMOVED)) 2356 return ENOENT; 2357 2358 /* 2359 * Attempt to rmdir dir/.. shoud raise ENOTEMPTY 2360 */ 2361 if (PERFUSE_NODE_DATA(targ)->pnd_nodeid == pnd->pnd_parent_nodeid) 2362 return ENOTEMPTY; 2363 2364 node_ref(opc); 2365 node_ref(targ); 2366 2367 /* 2368 * Await for all operations on the deleted node to drain, 2369 * as the filesystem may be confused to have it deleted 2370 * during a getattr 2371 */ 2372 while (PERFUSE_NODE_DATA(targ)->pnd_inxchg) 2373 requeue_request(pu, targ, PCQ_AFTERXCHG); 2374 2375 ps = puffs_getspecific(pu); 2376 name = pcn->pcn_name; 2377 len = pcn->pcn_namelen + 1; 2378 2379 pm = ps->ps_new_msg(pu, opc, FUSE_RMDIR, len, pcn->pcn_cred); 2380 path = _GET_INPAYLOAD(ps, pm, char *); 2381 (void)strlcpy(path, name, len); 2382 2383 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 2384 goto out; 2385 2386 perfuse_cache_flush(targ); 2387 PERFUSE_NODE_DATA(targ)->pnd_flags |= PND_REMOVED; 2388 2389 if (!(PERFUSE_NODE_DATA(targ)->pnd_flags & PND_OPEN)) 2390 puffs_setback(puffs_cc_getcc(pu), PUFFS_SETBACK_NOREF_N2); 2391 2392 /* 2393 * The parent directory needs a sync 2394 */ 2395 PERFUSE_NODE_DATA(opc)->pnd_flags |= PND_DIRTY; 2396 2397 #ifdef PERFUSE_DEBUG 2398 if (perfuse_diagflags & PDF_FILENAME) 2399 DPRINTF("%s: remove nodeid = 0x%"PRIx64" file = \"%s\"\n", 2400 __func__, PERFUSE_NODE_DATA(targ)->pnd_nodeid, 2401 perfuse_node_path(ps, targ)); 2402 #endif 2403 ps->ps_destroy_msg(pm); 2404 error = 0; 2405 2406 out: 2407 node_rele(opc); 2408 node_rele(targ); 2409 return error; 2410 } 2411 2412 /* vap is unused */ 2413 /* ARGSUSED4 */ 2414 int 2415 perfuse_node_symlink(struct puffs_usermount *pu, puffs_cookie_t opc, 2416 struct puffs_newinfo *pni, const struct puffs_cn *pcn_src, 2417 const struct vattr *vap, const char *link_target) 2418 { 2419 struct perfuse_state *ps; 2420 perfuse_msg_t *pm; 2421 char *np; 2422 const char *path; 2423 size_t path_len; 2424 size_t linkname_len; 2425 size_t len; 2426 int error; 2427 2428 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 2429 return ENOENT; 2430 2431 node_ref(opc); 2432 ps = puffs_getspecific(pu); 2433 path = pcn_src->pcn_name; 2434 path_len = pcn_src->pcn_namelen + 1; 2435 linkname_len = strlen(link_target) + 1; 2436 len = path_len + linkname_len; 2437 2438 pm = ps->ps_new_msg(pu, opc, FUSE_SYMLINK, len, pcn_src->pcn_cred); 2439 np = _GET_INPAYLOAD(ps, pm, char *); 2440 (void)strlcpy(np, path, path_len); 2441 np += path_len; 2442 (void)strlcpy(np, link_target, linkname_len); 2443 2444 error = node_mk_common(pu, opc, pni, pcn_src, pm); 2445 2446 node_rele(opc); 2447 return error; 2448 } 2449 2450 /* ARGSUSED4 */ 2451 int 2452 perfuse_node_readdir(struct puffs_usermount *pu, puffs_cookie_t opc, 2453 struct dirent *dent, off_t *readoff, size_t *reslen, 2454 const struct puffs_cred *pcr, int *eofflag, off_t *cookies, 2455 size_t *ncookies) 2456 { 2457 perfuse_msg_t *pm; 2458 uint64_t fh; 2459 struct perfuse_state *ps; 2460 struct perfuse_node_data *pnd; 2461 struct fuse_read_in *fri; 2462 struct fuse_out_header *foh; 2463 struct fuse_dirent *fd; 2464 size_t foh_len; 2465 int error; 2466 size_t fd_maxlen; 2467 2468 error = 0; 2469 node_ref(opc); 2470 ps = puffs_getspecific(pu); 2471 2472 /* 2473 * readdir state is kept at node level, and several readdir 2474 * requests can be issued at the same time on the same node. 2475 * We need to queue requests so that only one is in readdir 2476 * code at the same time. 2477 */ 2478 pnd = PERFUSE_NODE_DATA(opc); 2479 while (pnd->pnd_flags & PND_INREADDIR) 2480 requeue_request(pu, opc, PCQ_READDIR); 2481 pnd->pnd_flags |= PND_INREADDIR; 2482 2483 #ifdef PERFUSE_DEBUG 2484 if (perfuse_diagflags & PDF_READDIR) 2485 DPRINTF("%s: READDIR opc = %p enter critical section\n", 2486 __func__, (void *)opc); 2487 #endif 2488 /* 2489 * Re-initialize pnd->pnd_fd_cookie on the first readdir for a node 2490 */ 2491 if (*readoff == 0) 2492 pnd->pnd_fd_cookie = 0; 2493 2494 /* 2495 * Do we already have the data bufered? 2496 */ 2497 if (pnd->pnd_dirent != NULL) 2498 goto out; 2499 pnd->pnd_dirent_len = 0; 2500 2501 /* 2502 * It seems NetBSD can call readdir without open first 2503 * libfuse will crash if it is done that way, hence open first. 2504 */ 2505 if (!(pnd->pnd_flags & PND_OPEN)) { 2506 if ((error = perfuse_node_open(pu, opc, FREAD, pcr)) != 0) 2507 goto out; 2508 } 2509 2510 fh = perfuse_get_fh(opc, FREAD); 2511 2512 #ifdef PERFUSE_DEBUG 2513 if (perfuse_diagflags & PDF_FH) 2514 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", " 2515 "rfh = 0x%"PRIx64"\n", __func__, (void *)opc, 2516 PERFUSE_NODE_DATA(opc)->pnd_nodeid, fh); 2517 #endif 2518 2519 pnd->pnd_all_fd = NULL; 2520 pnd->pnd_all_fd_len = 0; 2521 fd_maxlen = ps->ps_max_readahead - sizeof(*foh); 2522 2523 do { 2524 size_t fd_len; 2525 char *afdp; 2526 2527 pm = ps->ps_new_msg(pu, opc, FUSE_READDIR, sizeof(*fri), pcr); 2528 2529 /* 2530 * read_flags, lock_owner and flags are unused in libfuse 2531 */ 2532 fri = GET_INPAYLOAD(ps, pm, fuse_read_in); 2533 fri->fh = fh; 2534 fri->offset = pnd->pnd_fd_cookie; 2535 fri->size = (uint32_t)fd_maxlen; 2536 fri->read_flags = 0; 2537 fri->lock_owner = 0; 2538 fri->flags = 0; 2539 2540 if ((error = xchg_msg(pu, opc, pm, 2541 UNSPEC_REPLY_LEN, wait_reply)) != 0) 2542 goto out; 2543 2544 /* 2545 * There are many puffs_framebufs calls later, 2546 * therefore foh will not be valid for a long time. 2547 * Just get the length and forget it. 2548 */ 2549 foh = GET_OUTHDR(ps, pm); 2550 foh_len = foh->len; 2551 2552 /* 2553 * Empty read: we reached the end of the buffer. 2554 */ 2555 if (foh_len == sizeof(*foh)) { 2556 ps->ps_destroy_msg(pm); 2557 *eofflag = 1; 2558 break; 2559 } 2560 2561 /* 2562 * Check for corrupted message. 2563 */ 2564 if (foh_len < sizeof(*foh) + sizeof(*fd)) { 2565 ps->ps_destroy_msg(pm); 2566 DWARNX("readdir reply too short"); 2567 error = EIO; 2568 goto out; 2569 } 2570 2571 2572 fd = GET_OUTPAYLOAD(ps, pm, fuse_dirent); 2573 fd_len = foh_len - sizeof(*foh); 2574 2575 pnd->pnd_all_fd = realloc(pnd->pnd_all_fd, 2576 pnd->pnd_all_fd_len + fd_len); 2577 if (pnd->pnd_all_fd == NULL) 2578 DERR(EX_OSERR, "%s: malloc failed", __func__); 2579 2580 afdp = (char *)(void *)pnd->pnd_all_fd + pnd->pnd_all_fd_len; 2581 (void)memcpy(afdp, fd, fd_len); 2582 2583 pnd->pnd_all_fd_len += fd_len; 2584 2585 /* 2586 * The fd->off field is used as a cookie for 2587 * resuming the next readdir() where this one was left. 2588 */ 2589 pnd->pnd_fd_cookie = readdir_last_cookie(fd, fd_len); 2590 2591 ps->ps_destroy_msg(pm); 2592 } while (1 /* CONSTCOND */); 2593 2594 if (pnd->pnd_all_fd != NULL) { 2595 if (fuse_to_dirent(pu, opc, pnd->pnd_all_fd, 2596 pnd->pnd_all_fd_len) == -1) 2597 error = EIO; 2598 } 2599 2600 out: 2601 if (pnd->pnd_all_fd != NULL) { 2602 free(pnd->pnd_all_fd); 2603 pnd->pnd_all_fd = NULL; 2604 pnd->pnd_all_fd_len = 0; 2605 } 2606 2607 if (error == 0) 2608 readdir_buffered(opc, dent, readoff, reslen); 2609 2610 /* 2611 * Schedule queued readdir requests 2612 */ 2613 pnd->pnd_flags &= ~PND_INREADDIR; 2614 (void)dequeue_requests(opc, PCQ_READDIR, DEQUEUE_ALL); 2615 2616 #ifdef PERFUSE_DEBUG 2617 if (perfuse_diagflags & PDF_READDIR) 2618 DPRINTF("%s: READDIR opc = %p exit critical section\n", 2619 __func__, (void *)opc); 2620 #endif 2621 2622 node_rele(opc); 2623 return error; 2624 } 2625 2626 int 2627 perfuse_node_readlink(struct puffs_usermount *pu, puffs_cookie_t opc, 2628 const struct puffs_cred *pcr, char *linkname, size_t *linklen) 2629 { 2630 struct perfuse_state *ps; 2631 perfuse_msg_t *pm; 2632 int error; 2633 size_t len; 2634 struct fuse_out_header *foh; 2635 2636 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 2637 return ENOENT; 2638 2639 node_ref(opc); 2640 ps = puffs_getspecific(pu); 2641 2642 pm = ps->ps_new_msg(pu, opc, FUSE_READLINK, 0, pcr); 2643 2644 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 2645 goto out; 2646 2647 foh = GET_OUTHDR(ps, pm); 2648 len = foh->len - sizeof(*foh); 2649 if (len > *linklen) 2650 DERRX(EX_PROTOCOL, "path len = %zd too long", len); 2651 if (len == 0) 2652 DERRX(EX_PROTOCOL, "path len = %zd too short", len); 2653 2654 (void)memcpy(linkname, _GET_OUTPAYLOAD(ps, pm, char *), len); 2655 2656 /* 2657 * FUSE filesystems return a NUL terminated string, we 2658 * do not want the trailing \0 2659 */ 2660 while (len > 0 && linkname[len - 1] == '\0') 2661 len--; 2662 2663 *linklen = len; 2664 2665 ps->ps_destroy_msg(pm); 2666 error = 0; 2667 2668 out: 2669 node_rele(opc); 2670 return error; 2671 } 2672 2673 int 2674 perfuse_node_reclaim(struct puffs_usermount *pu, puffs_cookie_t opc) 2675 { 2676 struct perfuse_state *ps; 2677 perfuse_msg_t *pm; 2678 struct perfuse_node_data *pnd; 2679 struct fuse_forget_in *ffi; 2680 int nlookup; 2681 struct timespec now; 2682 2683 if (opc == 0) 2684 return 0; 2685 2686 ps = puffs_getspecific(pu); 2687 pnd = PERFUSE_NODE_DATA(opc); 2688 2689 /* 2690 * Never forget the root. 2691 */ 2692 if (pnd->pnd_nodeid == FUSE_ROOT_ID) 2693 return 0; 2694 2695 /* 2696 * There is a race condition between reclaim and lookup. 2697 * When looking up an already known node, the kernel cannot 2698 * hold a reference on the result until it gets the PUFFS 2699 * reply. It mayy therefore reclaim the node after the 2700 * userland looked it up, and before it gets the reply. 2701 * On rely, the kernel re-creates the node, but at that 2702 * time the node has been reclaimed in userland. 2703 * 2704 * In order to avoid this, we refuse reclaiming nodes that 2705 * are too young since the last lookup - and that we do 2706 * not have removed on our own, of course. 2707 */ 2708 if (clock_gettime(CLOCK_REALTIME, &now) != 0) 2709 DERR(EX_OSERR, "clock_gettime failed"); 2710 2711 if (timespeccmp(&pnd->pnd_cn_expire, &now, >) && 2712 !(pnd->pnd_flags & PND_REMOVED)) { 2713 if (!(pnd->pnd_flags & PND_NODELEAK)) { 2714 ps->ps_nodeleakcount++; 2715 pnd->pnd_flags |= PND_NODELEAK; 2716 } 2717 DWARNX("possible leaked node:: opc = %p \"%s\"", 2718 opc, pnd->pnd_name); 2719 return 0; 2720 } 2721 2722 node_ref(opc); 2723 pnd->pnd_flags |= PND_RECLAIMED; 2724 pnd->pnd_puffs_nlookup--; 2725 nlookup = pnd->pnd_puffs_nlookup; 2726 2727 #ifdef PERFUSE_DEBUG 2728 if (perfuse_diagflags & PDF_RECLAIM) 2729 DPRINTF("%s (nodeid %"PRId64") reclaimed\n", 2730 perfuse_node_path(ps, opc), pnd->pnd_nodeid); 2731 #endif 2732 2733 #ifdef PERFUSE_DEBUG 2734 if (perfuse_diagflags & PDF_RECLAIM) 2735 DPRINTF("%s (nodeid %"PRId64") is %sreclaimed, nlookup = %d " 2736 "%s%s%s%s, pending ops:%s%s%s\n", 2737 perfuse_node_path(ps, opc), pnd->pnd_nodeid, 2738 pnd->pnd_flags & PND_RECLAIMED ? "" : "not ", 2739 pnd->pnd_puffs_nlookup, 2740 pnd->pnd_flags & PND_OPEN ? "open " : "not open", 2741 pnd->pnd_flags & PND_RFH ? "r" : "", 2742 pnd->pnd_flags & PND_WFH ? "w" : "", 2743 pnd->pnd_flags & PND_BUSY ? "" : " none", 2744 pnd->pnd_flags & PND_INREADDIR ? " readdir" : "", 2745 pnd->pnd_flags & PND_INWRITE ? " write" : "", 2746 pnd->pnd_flags & PND_INOPEN ? " open" : ""); 2747 #endif 2748 /* 2749 * Make sure it is not looked up again 2750 */ 2751 if (!(pnd->pnd_flags & PND_REMOVED)) 2752 perfuse_cache_flush(opc); 2753 2754 /* 2755 * Purge any activity on the node, while checking 2756 * that it remains eligible for a reclaim. 2757 */ 2758 while (pnd->pnd_ref > 1) 2759 requeue_request(pu, opc, PCQ_REF); 2760 2761 /* 2762 * reclaim cancel? 2763 */ 2764 if (pnd->pnd_puffs_nlookup > nlookup) { 2765 pnd->pnd_flags &= ~PND_RECLAIMED; 2766 perfuse_node_cache(ps, opc); 2767 node_rele(opc); 2768 return 0; 2769 } 2770 2771 2772 #ifdef PERFUSE_DEBUG 2773 if ((pnd->pnd_flags & PND_OPEN) || 2774 !TAILQ_EMPTY(&pnd->pnd_pcq)) 2775 DERRX(EX_SOFTWARE, "%s: opc = %p \"%s\": still open", 2776 __func__, opc, pnd->pnd_name); 2777 2778 if ((pnd->pnd_flags & PND_BUSY) || 2779 !TAILQ_EMPTY(&pnd->pnd_pcq)) 2780 DERRX(EX_SOFTWARE, "%s: opc = %p: queued operations", 2781 __func__, opc); 2782 2783 if (pnd->pnd_inxchg != 0) 2784 DERRX(EX_SOFTWARE, "%s: opc = %p: ongoing operations", 2785 __func__, opc); 2786 #endif 2787 2788 /* 2789 * Send the FORGET message 2790 * 2791 * ps_new_msg() is called with NULL creds, which will 2792 * be interpreted as FUSE superuser. This is obviously 2793 * fine since we operate with kernel creds here. 2794 */ 2795 pm = ps->ps_new_msg(pu, opc, FUSE_FORGET, 2796 sizeof(*ffi), NULL); 2797 ffi = GET_INPAYLOAD(ps, pm, fuse_forget_in); 2798 ffi->nlookup = pnd->pnd_fuse_nlookup; 2799 2800 /* 2801 * No reply is expected, pm is freed in xchg_msg 2802 */ 2803 (void)xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, no_reply); 2804 2805 perfuse_destroy_pn(pu, opc); 2806 2807 return 0; 2808 } 2809 2810 int 2811 perfuse_node_inactive(struct puffs_usermount *pu, puffs_cookie_t opc) 2812 { 2813 struct perfuse_node_data *pnd; 2814 int error; 2815 2816 if (opc == 0) 2817 return 0; 2818 2819 pnd = PERFUSE_NODE_DATA(opc); 2820 if (!(pnd->pnd_flags & (PND_OPEN|PND_REMOVED))) 2821 return 0; 2822 2823 node_ref(opc); 2824 2825 /* 2826 * Make sure all operation are finished 2827 * There can be an ongoing write. Other 2828 * operation wait for all data before 2829 * the close/inactive. 2830 */ 2831 while (pnd->pnd_flags & PND_INWRITE) 2832 requeue_request(pu, opc, PCQ_AFTERWRITE); 2833 2834 /* 2835 * The inactive operation may be cancelled, 2836 * If no open is in progress, set PND_INOPEN 2837 * so that a new open will be queued. 2838 */ 2839 if (pnd->pnd_flags & PND_INOPEN) 2840 goto out; 2841 2842 pnd->pnd_flags |= PND_INOPEN; 2843 2844 /* 2845 * Sync data 2846 */ 2847 if (pnd->pnd_flags & PND_DIRTY) { 2848 if ((error = perfuse_node_fsync(pu, opc, NULL, 0, 0, 0)) != 0) 2849 DWARN("%s: perfuse_node_fsync failed error = %d", 2850 __func__, error); 2851 } 2852 2853 2854 /* 2855 * Close handles 2856 */ 2857 if (pnd->pnd_flags & PND_WFH) { 2858 if ((error = perfuse_node_close_common(pu, opc, FWRITE)) != 0) 2859 DWARN("%s: close write FH failed error = %d", 2860 __func__, error); 2861 } 2862 2863 if (pnd->pnd_flags & PND_RFH) { 2864 if ((error = perfuse_node_close_common(pu, opc, FREAD)) != 0) 2865 DWARN("%s: close read FH failed error = %d", 2866 __func__, error); 2867 } 2868 2869 /* 2870 * This will cause a reclaim to be sent 2871 */ 2872 if (pnd->pnd_flags & PND_REMOVED) 2873 puffs_setback(puffs_cc_getcc(pu), PUFFS_SETBACK_NOREF_N1); 2874 2875 /* 2876 * Schedule awaiting operations 2877 */ 2878 pnd->pnd_flags &= ~PND_INOPEN; 2879 (void)dequeue_requests(opc, PCQ_OPEN, DEQUEUE_ALL); 2880 2881 /* 2882 * errors are ignored, since the kernel ignores the return code. 2883 */ 2884 out: 2885 node_rele(opc); 2886 return 0; 2887 } 2888 2889 2890 /* ARGSUSED0 */ 2891 int 2892 perfuse_node_print(struct puffs_usermount *pu, puffs_cookie_t opc) 2893 { 2894 DERRX(EX_SOFTWARE, "%s: UNIMPLEMENTED (FATAL)", __func__); 2895 return 0; 2896 } 2897 2898 int 2899 perfuse_node_pathconf(struct puffs_usermount *pu, puffs_cookie_t opc, 2900 int name, register_t *retval) 2901 { 2902 perfuse_msg_t *pm; 2903 struct perfuse_state *ps; 2904 struct fuse_statfs_out *fso; 2905 int error = 0; 2906 2907 /* 2908 * Static values copied from UFS 2909 * in src/sys/ufs/ufs/ufs_vnops.c 2910 */ 2911 switch (name) { 2912 case _PC_LINK_MAX: 2913 *retval = LINK_MAX; 2914 break; 2915 case _PC_PATH_MAX: 2916 *retval = PATH_MAX; 2917 break; 2918 case _PC_PIPE_BUF: 2919 *retval = PIPE_BUF; 2920 break; 2921 case _PC_CHOWN_RESTRICTED: 2922 *retval = 1; 2923 break; 2924 case _PC_NO_TRUNC: 2925 *retval = 1; 2926 break; 2927 case _PC_SYNC_IO: 2928 *retval = 1; 2929 break; 2930 case _PC_FILESIZEBITS: 2931 *retval = 42; 2932 break; 2933 case _PC_SYMLINK_MAX: 2934 *retval = MAXPATHLEN; 2935 break; 2936 case _PC_2_SYMLINKS: 2937 *retval = 1; 2938 break; 2939 case _PC_NAME_MAX: 2940 ps = puffs_getspecific(pu); 2941 pm = ps->ps_new_msg(pu, opc, FUSE_STATFS, 0, NULL); 2942 2943 error = xchg_msg(pu, opc, pm, sizeof(*fso), wait_reply); 2944 if (error != 0) 2945 return error; 2946 2947 fso = GET_OUTPAYLOAD(ps, pm, fuse_statfs_out); 2948 *retval = fso->st.namelen; 2949 2950 ps->ps_destroy_msg(pm); 2951 2952 break; 2953 default: 2954 DWARN("Unimplemented pathconf for name = %d", name); 2955 error = ENOSYS; 2956 break; 2957 } 2958 2959 return error; 2960 } 2961 2962 int 2963 perfuse_node_advlock(struct puffs_usermount *pu, puffs_cookie_t opc, 2964 void *id, int op, struct flock *fl, int flags) 2965 { 2966 struct perfuse_state *ps; 2967 int fop; 2968 perfuse_msg_t *pm; 2969 uint64_t fh; 2970 struct fuse_lk_in *fli; 2971 struct fuse_out_header *foh; 2972 struct fuse_lk_out *flo; 2973 uint32_t owner; 2974 size_t len; 2975 int error; 2976 2977 node_ref(opc); 2978 2979 /* 2980 * Make sure we do have a filehandle, as the FUSE filesystem 2981 * expect one. E.g.: if we provide none, GlusterFS logs an error 2982 * "0-glusterfs-fuse: xl is NULL" 2983 * 2984 * We need the read file handle if the file is open read only, 2985 * in order to support shared locks on read-only files. 2986 * NB: The kernel always sends advlock for read-only 2987 * files at exit time when the process used lock, see 2988 * sys_exit -> exit1 -> fd_free -> fd_close -> VOP_ADVLOCK 2989 */ 2990 if ((fh = perfuse_get_fh(opc, FREAD)) == FUSE_UNKNOWN_FH) { 2991 error = EBADF; 2992 goto out; 2993 } 2994 2995 ps = puffs_getspecific(pu); 2996 2997 if (op == F_GETLK) 2998 fop = FUSE_GETLK; 2999 else 3000 fop = (flags & F_WAIT) ? FUSE_SETLKW : FUSE_SETLK; 3001 3002 /* 3003 * XXX ps_new_msg() is called with NULL creds, which will 3004 * be interpreted as FUSE superuser. We have no way to 3005 * know the requesting process' credential, but since advlock() 3006 * is supposed to operate on a file that has been open(), 3007 * permission should have already been checked at open() time. 3008 */ 3009 pm = ps->ps_new_msg(pu, opc, fop, sizeof(*fli), NULL); 3010 fli = GET_INPAYLOAD(ps, pm, fuse_lk_in); 3011 fli->fh = fh; 3012 fli->owner = (uint64_t)(vaddr_t)id; 3013 fli->lk.start = fl->l_start; 3014 fli->lk.end = fl->l_start + fl->l_len; 3015 fli->lk.type = fl->l_type; 3016 fli->lk.pid = fl->l_pid; 3017 fli->lk_flags = (flags & F_FLOCK) ? FUSE_LK_FLOCK : 0; 3018 3019 owner = (uint32_t)(vaddr_t)id; 3020 3021 #ifdef PERFUSE_DEBUG 3022 if (perfuse_diagflags & PDF_FH) 3023 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", fh = 0x%"PRIx64"\n", 3024 __func__, (void *)opc, 3025 PERFUSE_NODE_DATA(opc)->pnd_nodeid, fli->fh); 3026 #endif 3027 3028 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 3029 goto out; 3030 3031 foh = GET_OUTHDR(ps, pm); 3032 len = foh->len - sizeof(*foh); 3033 3034 /* 3035 * Save or clear the lock 3036 */ 3037 switch (op) { 3038 case F_GETLK: 3039 if (len != sizeof(*flo)) 3040 DERRX(EX_SOFTWARE, 3041 "%s: Unexpected lock reply len %zd", 3042 __func__, len); 3043 3044 flo = GET_OUTPAYLOAD(ps, pm, fuse_lk_out); 3045 fl->l_start = flo->lk.start; 3046 fl->l_len = flo->lk.end - flo->lk.start; 3047 fl->l_pid = flo->lk.pid; 3048 fl->l_type = flo->lk.type; 3049 fl->l_whence = SEEK_SET; /* libfuse hardcodes it */ 3050 3051 PERFUSE_NODE_DATA(opc)->pnd_lock_owner = flo->lk.pid; 3052 break; 3053 case F_UNLCK: 3054 owner = 0; 3055 /* FALLTHROUGH */ 3056 case F_SETLK: 3057 /* FALLTHROUGH */ 3058 case F_SETLKW: 3059 if (error != 0) 3060 PERFUSE_NODE_DATA(opc)->pnd_lock_owner = owner; 3061 3062 if (len != 0) 3063 DERRX(EX_SOFTWARE, 3064 "%s: Unexpected unlock reply len %zd", 3065 __func__, len); 3066 3067 break; 3068 default: 3069 DERRX(EX_SOFTWARE, "%s: Unexpected op %d", __func__, op); 3070 break; 3071 } 3072 3073 ps->ps_destroy_msg(pm); 3074 error = 0; 3075 3076 out: 3077 node_rele(opc); 3078 return error; 3079 } 3080 3081 int 3082 perfuse_node_read(struct puffs_usermount *pu, puffs_cookie_t opc, uint8_t *buf, 3083 off_t offset, size_t *resid, const struct puffs_cred *pcr, int ioflag) 3084 { 3085 struct perfuse_state *ps; 3086 struct perfuse_node_data *pnd; 3087 const struct vattr *vap; 3088 perfuse_msg_t *pm; 3089 struct fuse_read_in *fri; 3090 struct fuse_out_header *foh; 3091 size_t readen; 3092 int error; 3093 3094 ps = puffs_getspecific(pu); 3095 pnd = PERFUSE_NODE_DATA(opc); 3096 vap = puffs_pn_getvap((struct puffs_node *)opc); 3097 3098 /* 3099 * NetBSD turns that into a getdents(2) output 3100 * We just do a EISDIR as this feature is of little use. 3101 */ 3102 if (vap->va_type == VDIR) 3103 return EISDIR; 3104 3105 do { 3106 size_t max_read; 3107 3108 max_read = ps->ps_max_readahead - sizeof(*foh); 3109 /* 3110 * flags may be set to FUSE_READ_LOCKOWNER 3111 * if lock_owner is provided. 3112 */ 3113 pm = ps->ps_new_msg(pu, opc, FUSE_READ, sizeof(*fri), pcr); 3114 fri = GET_INPAYLOAD(ps, pm, fuse_read_in); 3115 fri->fh = perfuse_get_fh(opc, FREAD); 3116 fri->offset = offset; 3117 fri->size = (uint32_t)MIN(*resid, max_read); 3118 fri->read_flags = 0; /* XXX Unused by libfuse? */ 3119 fri->lock_owner = pnd->pnd_lock_owner; 3120 fri->flags = 0; 3121 fri->flags |= (fri->lock_owner != 0) ? FUSE_READ_LOCKOWNER : 0; 3122 3123 #ifdef PERFUSE_DEBUG 3124 if (perfuse_diagflags & PDF_FH) 3125 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", fh = 0x%"PRIx64"\n", 3126 __func__, (void *)opc, pnd->pnd_nodeid, fri->fh); 3127 #endif 3128 error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply); 3129 if (error != 0) 3130 return error; 3131 3132 foh = GET_OUTHDR(ps, pm); 3133 readen = foh->len - sizeof(*foh); 3134 3135 #ifdef PERFUSE_DEBUG 3136 if (readen > *resid) 3137 DERRX(EX_SOFTWARE, "%s: Unexpected big read %zd", 3138 __func__, readen); 3139 #endif 3140 3141 (void)memcpy(buf, _GET_OUTPAYLOAD(ps, pm, char *), readen); 3142 3143 buf += readen; 3144 offset += readen; 3145 *resid -= readen; 3146 3147 ps->ps_destroy_msg(pm); 3148 } while ((*resid != 0) && (readen != 0)); 3149 3150 if (ioflag & (IO_SYNC|IO_DSYNC)) 3151 ps->ps_syncreads++; 3152 else 3153 ps->ps_asyncreads++; 3154 3155 return 0; 3156 } 3157 3158 int 3159 perfuse_node_write(struct puffs_usermount *pu, puffs_cookie_t opc, 3160 uint8_t *buf, off_t offset, size_t *resid, 3161 const struct puffs_cred *pcr, int ioflag) 3162 { 3163 return perfuse_node_write2(pu, opc, buf, offset, resid, pcr, ioflag, 0); 3164 } 3165 3166 /* ARGSUSED7 */ 3167 int 3168 perfuse_node_write2(struct puffs_usermount *pu, puffs_cookie_t opc, 3169 uint8_t *buf, off_t offset, size_t *resid, 3170 const struct puffs_cred *pcr, int ioflag, int xflag) 3171 { 3172 struct perfuse_state *ps; 3173 struct perfuse_node_data *pnd; 3174 struct vattr *vap; 3175 perfuse_msg_t *pm; 3176 struct fuse_write_in *fwi; 3177 struct fuse_write_out *fwo; 3178 size_t data_len; 3179 size_t payload_len; 3180 size_t written; 3181 int inresize; 3182 int error; 3183 3184 ps = puffs_getspecific(pu); 3185 pnd = PERFUSE_NODE_DATA(opc); 3186 vap = puffs_pn_getvap((struct puffs_node *)opc); 3187 written = 0; 3188 inresize = 0; 3189 error = 0; 3190 3191 if (vap->va_type == VDIR) 3192 return EISDIR; 3193 3194 node_ref(opc); 3195 3196 /* 3197 * We need to queue write requests in order to avoid 3198 * dequeueing PCQ_AFTERWRITE when there are pending writes. 3199 */ 3200 while (pnd->pnd_flags & PND_INWRITE) 3201 requeue_request(pu, opc, PCQ_WRITE); 3202 pnd->pnd_flags |= PND_INWRITE; 3203 3204 /* 3205 * append flag: re-read the file size so that 3206 * we get the latest value. 3207 */ 3208 if (ioflag & PUFFS_IO_APPEND) { 3209 if ((error = perfuse_node_getattr(pu, opc, vap, pcr)) != 0) 3210 goto out; 3211 3212 offset = vap->va_size; 3213 } 3214 3215 /* 3216 * Serialize size access, see comment in perfuse_node_setattr(). 3217 */ 3218 if ((u_quad_t)offset + *resid > vap->va_size) { 3219 while (pnd->pnd_flags & PND_INRESIZE) 3220 requeue_request(pu, opc, PCQ_RESIZE); 3221 pnd->pnd_flags |= PND_INRESIZE; 3222 inresize = 1; 3223 } 3224 3225 #ifdef PERFUSE_DEBUG 3226 if (perfuse_diagflags & PDF_RESIZE) 3227 DPRINTF(">> %s %p %" PRIu64 "\n", __func__, 3228 (void *)opc, vap->va_size); 3229 #endif 3230 3231 do { 3232 size_t max_write; 3233 /* 3234 * There is a writepage flag when data 3235 * is aligned to page size. Use it for 3236 * everything but the data after the last 3237 * page boundary. 3238 */ 3239 max_write = ps->ps_max_write - sizeof(*fwi); 3240 3241 data_len = MIN(*resid, max_write); 3242 if (data_len > (size_t)sysconf(_SC_PAGESIZE)) 3243 data_len = data_len & ~(sysconf(_SC_PAGESIZE) - 1); 3244 3245 payload_len = data_len + sizeof(*fwi); 3246 3247 /* 3248 * flags may be set to FUSE_WRITE_CACHE (XXX usage?) 3249 * or FUSE_WRITE_LOCKOWNER, if lock_owner is provided. 3250 * write_flags is set to 1 for writepage. 3251 */ 3252 pm = ps->ps_new_msg(pu, opc, FUSE_WRITE, payload_len, pcr); 3253 fwi = GET_INPAYLOAD(ps, pm, fuse_write_in); 3254 fwi->fh = perfuse_get_fh(opc, FWRITE); 3255 fwi->offset = offset; 3256 fwi->size = (uint32_t)data_len; 3257 fwi->write_flags = (fwi->size % sysconf(_SC_PAGESIZE)) ? 0 : 1; 3258 fwi->lock_owner = pnd->pnd_lock_owner; 3259 fwi->flags = 0; 3260 fwi->flags |= (fwi->lock_owner != 0) ? FUSE_WRITE_LOCKOWNER : 0; 3261 fwi->flags |= (ioflag & IO_DIRECT) ? 0 : FUSE_WRITE_CACHE; 3262 (void)memcpy((fwi + 1), buf, data_len); 3263 3264 3265 #ifdef PERFUSE_DEBUG 3266 if (perfuse_diagflags & PDF_FH) 3267 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", " 3268 "fh = 0x%"PRIx64"\n", __func__, 3269 (void *)opc, pnd->pnd_nodeid, fwi->fh); 3270 #endif 3271 if ((error = xchg_msg(pu, opc, pm, 3272 sizeof(*fwo), wait_reply)) != 0) 3273 goto out; 3274 3275 fwo = GET_OUTPAYLOAD(ps, pm, fuse_write_out); 3276 written = fwo->size; 3277 ps->ps_destroy_msg(pm); 3278 3279 #ifdef PERFUSE_DEBUG 3280 if (written > *resid) 3281 DERRX(EX_SOFTWARE, "%s: Unexpected big write %zd", 3282 __func__, written); 3283 #endif 3284 *resid -= written; 3285 offset += written; 3286 buf += written; 3287 3288 } while (*resid != 0); 3289 3290 /* 3291 * puffs_ops(3) says 3292 * "everything must be written or an error will be generated" 3293 */ 3294 if (*resid != 0) 3295 error = EFBIG; 3296 3297 out: 3298 #ifdef PERFUSE_DEBUG 3299 if (perfuse_diagflags & PDF_RESIZE) { 3300 if (offset > (off_t)vap->va_size) 3301 DPRINTF("<< %s %p %" PRIu64 " -> %lld\n", __func__, 3302 (void *)opc, vap->va_size, (long long)offset); 3303 else 3304 DPRINTF("<< %s %p \n", __func__, (void *)opc); 3305 } 3306 #endif 3307 3308 /* 3309 * Update file size if we wrote beyond the end 3310 */ 3311 if (offset > (off_t)vap->va_size) 3312 vap->va_size = offset; 3313 3314 /* 3315 * Statistics 3316 */ 3317 if (ioflag & (IO_SYNC|IO_DSYNC)) 3318 ps->ps_syncwrites++; 3319 else 3320 ps->ps_asyncwrites++; 3321 3322 /* 3323 * Remember to sync the file 3324 */ 3325 pnd->pnd_flags |= PND_DIRTY; 3326 3327 #ifdef PERFUSE_DEBUG 3328 if (perfuse_diagflags & PDF_SYNC) 3329 DPRINTF("%s: DIRTY opc = %p, file = \"%s\"\n", 3330 __func__, (void*)opc, perfuse_node_path(ps, opc)); 3331 #endif 3332 3333 if (inresize) { 3334 #ifdef PERFUSE_DEBUG 3335 if (!(pnd->pnd_flags & PND_INRESIZE)) 3336 DERRX(EX_SOFTWARE, "file write grow without resize"); 3337 #endif 3338 pnd->pnd_flags &= ~PND_INRESIZE; 3339 (void)dequeue_requests(opc, PCQ_RESIZE, DEQUEUE_ALL); 3340 } 3341 3342 /* 3343 * VOP_PUTPAGE causes FAF write where kernel does not 3344 * check operation result. At least warn if it failed. 3345 */ 3346 #ifdef PUFFS_WRITE_FAF 3347 if (error && (xflag & PUFFS_WRITE_FAF)) 3348 DWARN("Data loss caused by FAF write failed on \"%s\"", 3349 pnd->pnd_name); 3350 #endif /* PUFFS_WRITE_FAF */ 3351 3352 /* 3353 * If there are no more queued write, we can resume 3354 * an operation awaiting write completion. 3355 */ 3356 pnd->pnd_flags &= ~PND_INWRITE; 3357 if (dequeue_requests(opc, PCQ_WRITE, 1) == 0) 3358 (void)dequeue_requests(opc, PCQ_AFTERWRITE, DEQUEUE_ALL); 3359 3360 node_rele(opc); 3361 return error; 3362 } 3363 3364 /* ARGSUSED0 */ 3365 void 3366 perfuse_cache_write(struct puffs_usermount *pu, puffs_cookie_t opc, size_t size, 3367 struct puffs_cacherun *runs) 3368 { 3369 return; 3370 } 3371 3372 /* ARGSUSED4 */ 3373 int 3374 perfuse_node_getextattr(struct puffs_usermount *pu, puffs_cookie_t opc, 3375 int attrns, const char *attrname, size_t *attrsize, uint8_t *attr, 3376 size_t *resid, const struct puffs_cred *pcr) 3377 { 3378 struct perfuse_state *ps; 3379 char fuse_attrname[LINUX_XATTR_NAME_MAX + 1]; 3380 perfuse_msg_t *pm; 3381 struct fuse_getxattr_in *fgi; 3382 struct fuse_getxattr_out *fgo; 3383 struct fuse_out_header *foh; 3384 size_t attrnamelen; 3385 size_t len; 3386 char *np; 3387 int error; 3388 3389 /* system namespace attrs are not accessible to non root users */ 3390 if (attrns == EXTATTR_NAMESPACE_SYSTEM && !puffs_cred_isjuggernaut(pcr)) 3391 return EPERM; 3392 3393 node_ref(opc); 3394 ps = puffs_getspecific(pu); 3395 attrname = perfuse_native_ns(attrns, attrname, fuse_attrname); 3396 attrnamelen = strlen(attrname) + 1; 3397 len = sizeof(*fgi) + attrnamelen; 3398 3399 pm = ps->ps_new_msg(pu, opc, FUSE_GETXATTR, len, pcr); 3400 fgi = GET_INPAYLOAD(ps, pm, fuse_getxattr_in); 3401 fgi->size = (unsigned int)((resid != NULL) ? *resid : 0); 3402 np = (char *)(void *)(fgi + 1); 3403 (void)strlcpy(np, attrname, attrnamelen); 3404 3405 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 3406 goto out; 3407 3408 /* 3409 * We just get fuse_getattr_out with list size if we requested 3410 * a null size. 3411 */ 3412 if (resid == NULL) { 3413 fgo = GET_OUTPAYLOAD(ps, pm, fuse_getxattr_out); 3414 3415 if (attrsize != NULL) 3416 *attrsize = fgo->size; 3417 3418 ps->ps_destroy_msg(pm); 3419 error = 0; 3420 goto out; 3421 } 3422 3423 /* 3424 * And with a non null requested size, we get the list just 3425 * after the header 3426 */ 3427 foh = GET_OUTHDR(ps, pm); 3428 np = (char *)(void *)(foh + 1); 3429 len = foh->len - sizeof(*foh); 3430 3431 if (attrsize != NULL) 3432 *attrsize = len; 3433 3434 if (resid != NULL) { 3435 if (*resid < len) { 3436 error = ERANGE; 3437 ps->ps_destroy_msg(pm); 3438 goto out; 3439 } 3440 3441 (void)memcpy(attr, np, len); 3442 *resid -= len; 3443 } 3444 3445 ps->ps_destroy_msg(pm); 3446 error = 0; 3447 3448 out: 3449 node_rele(opc); 3450 return error; 3451 } 3452 3453 int 3454 perfuse_node_setextattr(struct puffs_usermount *pu, puffs_cookie_t opc, 3455 int attrns, const char *attrname, uint8_t *attr, size_t *resid, 3456 const struct puffs_cred *pcr) 3457 { 3458 struct perfuse_state *ps; 3459 char fuse_attrname[LINUX_XATTR_NAME_MAX + 1]; 3460 perfuse_msg_t *pm; 3461 struct fuse_setxattr_in *fsi; 3462 size_t attrnamelen; 3463 size_t len; 3464 char *np; 3465 int error; 3466 3467 /* system namespace attrs are not accessible to non root users */ 3468 if (attrns == EXTATTR_NAMESPACE_SYSTEM && !puffs_cred_isjuggernaut(pcr)) 3469 return EPERM; 3470 3471 node_ref(opc); 3472 ps = puffs_getspecific(pu); 3473 attrname = perfuse_native_ns(attrns, attrname, fuse_attrname); 3474 attrnamelen = strlen(attrname) + 1; 3475 len = sizeof(*fsi) + attrnamelen + *resid; 3476 3477 pm = ps->ps_new_msg(pu, opc, FUSE_SETXATTR, len, pcr); 3478 fsi = GET_INPAYLOAD(ps, pm, fuse_setxattr_in); 3479 fsi->size = (unsigned int)*resid; 3480 fsi->flags = 0; 3481 np = (char *)(void *)(fsi + 1); 3482 (void)strlcpy(np, attrname, attrnamelen); 3483 np += attrnamelen; 3484 (void)memcpy(np, (char *)attr, *resid); 3485 3486 if ((error = xchg_msg(pu, opc, pm, 3487 NO_PAYLOAD_REPLY_LEN, wait_reply)) != 0) 3488 goto out; 3489 3490 ps->ps_destroy_msg(pm); 3491 *resid = 0; 3492 error = 0; 3493 3494 out: 3495 node_rele(opc); 3496 return error; 3497 } 3498 3499 /* ARGSUSED2 */ 3500 int 3501 perfuse_node_listextattr(struct puffs_usermount *pu, puffs_cookie_t opc, 3502 int attrns, size_t *attrsize, uint8_t *attrs, size_t *resid, int flag, 3503 const struct puffs_cred *pcr) 3504 { 3505 struct perfuse_state *ps; 3506 perfuse_msg_t *pm; 3507 struct fuse_getxattr_in *fgi; 3508 struct fuse_getxattr_out *fgo; 3509 struct fuse_out_header *foh; 3510 char *np; 3511 size_t len, puffs_len, i, attrlen, outlen; 3512 int error; 3513 3514 /* system namespace attrs are not accessible to non root users */ 3515 if (attrns == EXTATTR_NAMESPACE_SYSTEM && !puffs_cred_isjuggernaut(pcr)) 3516 return EPERM; 3517 3518 node_ref(opc); 3519 3520 ps = puffs_getspecific(pu); 3521 len = sizeof(*fgi); 3522 3523 pm = ps->ps_new_msg(pu, opc, FUSE_LISTXATTR, len, pcr); 3524 fgi = GET_INPAYLOAD(ps, pm, fuse_getxattr_in); 3525 if (resid != NULL) 3526 fgi->size = (unsigned int)*resid; 3527 else 3528 fgi->size = 0; 3529 3530 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 3531 goto out; 3532 3533 /* 3534 * We just get fuse_getattr_out with list size if we requested 3535 * a null size. 3536 */ 3537 if (resid == NULL) { 3538 fgo = GET_OUTPAYLOAD(ps, pm, fuse_getxattr_out); 3539 3540 if (attrsize != NULL) 3541 *attrsize = fgo->size; 3542 3543 ps->ps_destroy_msg(pm); 3544 3545 error = 0; 3546 goto out; 3547 } 3548 3549 /* 3550 * And with a non null requested size, we get the list just 3551 * after the header 3552 */ 3553 foh = GET_OUTHDR(ps, pm); 3554 np = (char *)(void *)(foh + 1); 3555 puffs_len = foh->len - sizeof(*foh); 3556 3557 if (attrsize != NULL) 3558 *attrsize = puffs_len; 3559 3560 if (attrs != NULL) { 3561 if (*resid < puffs_len) { 3562 error = ERANGE; 3563 ps->ps_destroy_msg(pm); 3564 goto out; 3565 } 3566 3567 outlen = 0; 3568 3569 for (i = 0; i < puffs_len; i += attrlen + 1) { 3570 attrlen = strlen(np + i); 3571 3572 /* 3573 * Filter attributes per namespace 3574 */ 3575 if (!perfuse_ns_match(attrns, np + i)) 3576 continue; 3577 3578 #ifdef PUFFS_EXTATTR_LIST_LENPREFIX 3579 /* 3580 * Convert the FUSE reply to length prefixed strings 3581 * if this is what the kernel wants. 3582 */ 3583 if (flag & PUFFS_EXTATTR_LIST_LENPREFIX) { 3584 (void)memcpy(attrs + outlen + 1, 3585 np + i, attrlen); 3586 *(attrs + outlen) = (uint8_t)attrlen; 3587 } else 3588 #endif /* PUFFS_EXTATTR_LIST_LENPREFIX */ 3589 (void)memcpy(attrs + outlen, np + i, attrlen + 1); 3590 outlen += attrlen + 1; 3591 } 3592 3593 *resid -= outlen; 3594 } 3595 3596 ps->ps_destroy_msg(pm); 3597 error = 0; 3598 3599 out: 3600 node_rele(opc); 3601 return error; 3602 } 3603 3604 int 3605 perfuse_node_deleteextattr(struct puffs_usermount *pu, puffs_cookie_t opc, 3606 int attrns, const char *attrname, const struct puffs_cred *pcr) 3607 { 3608 struct perfuse_state *ps; 3609 char fuse_attrname[LINUX_XATTR_NAME_MAX + 1]; 3610 perfuse_msg_t *pm; 3611 size_t attrnamelen; 3612 char *np; 3613 int error; 3614 3615 /* system namespace attrs are not accessible to non root users */ 3616 if (attrns == EXTATTR_NAMESPACE_SYSTEM && !puffs_cred_isjuggernaut(pcr)) 3617 return EPERM; 3618 3619 node_ref(opc); 3620 3621 ps = puffs_getspecific(pu); 3622 attrname = perfuse_native_ns(attrns, attrname, fuse_attrname); 3623 attrnamelen = strlen(attrname) + 1; 3624 3625 pm = ps->ps_new_msg(pu, opc, FUSE_REMOVEXATTR, attrnamelen, pcr); 3626 np = _GET_INPAYLOAD(ps, pm, char *); 3627 (void)strlcpy(np, attrname, attrnamelen); 3628 3629 error = xchg_msg(pu, opc, pm, NO_PAYLOAD_REPLY_LEN, wait_reply); 3630 if (error != 0) 3631 goto out; 3632 3633 ps->ps_destroy_msg(pm); 3634 3635 out: 3636 node_rele(opc); 3637 return error; 3638 } 3639 3640 int 3641 perfuse_node_fallocate(struct puffs_usermount *pu, puffs_cookie_t opc, 3642 off_t off, off_t len) 3643 { 3644 struct perfuse_state *ps; 3645 perfuse_msg_t *pm; 3646 struct fuse_fallocate_in *fai; 3647 int error; 3648 3649 ps = puffs_getspecific(pu); 3650 if (ps->ps_flags & PS_NO_FALLOCATE) 3651 return EOPNOTSUPP; 3652 3653 node_ref(opc); 3654 3655 pm = ps->ps_new_msg(pu, opc, FUSE_FALLOCATE, sizeof(*fai), NULL); 3656 3657 fai = GET_INPAYLOAD(ps, pm, fuse_fallocate_in); 3658 fai->fh = perfuse_get_fh(opc, FWRITE); 3659 fai->offset = off; 3660 fai->length = len; 3661 fai->mode = 0; 3662 3663 error = xchg_msg(pu, opc, pm, NO_PAYLOAD_REPLY_LEN, wait_reply); 3664 if (error == EOPNOTSUPP || error == ENOSYS) { 3665 ps->ps_flags |= PS_NO_FALLOCATE; 3666 error = EOPNOTSUPP; 3667 } 3668 if (error != 0) 3669 goto out; 3670 3671 ps->ps_destroy_msg(pm); 3672 3673 out: 3674 node_rele(opc); 3675 return error; 3676 } 3677
Indexes created Sun Sep 21 16:09:51 GMT 2025