1 /* $NetBSD: ops.c,v 1.92 2023/06/24 05:18:13 msaitoh 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 #define PN_ISDIR(opc) \ 109 (puffs_pn_getvap((struct puffs_node *)opc)->va_type == VDIR) 110 111 #if 0 112 static void 113 print_node(const char *func, puffs_cookie_t opc) 114 { 115 struct puffs_node *pn; 116 struct perfuse_node_data *pnd; 117 struct vattr *vap; 118 119 pn = (struct puffs_node *)opc; 120 pnd = PERFUSE_NODE_DATA(opc); 121 vap = &pn->pn_va; 122 123 printf("%s: \"%s\", opc = %p, nodeid = 0x%"PRIx64" ino = %"PRIu64"\n", 124 func, pnd->pnd_name, opc, pnd->pnd_nodeid, vap->va_fileid); 125 126 return; 127 } 128 #endif /* PERFUSE_DEBUG */ 129 130 int 131 perfuse_node_close_common(struct puffs_usermount *pu, puffs_cookie_t opc, 132 int mode) 133 { 134 struct perfuse_state *ps; 135 perfuse_msg_t *pm; 136 int op; 137 uint64_t fh; 138 struct fuse_release_in *fri; 139 struct perfuse_node_data *pnd; 140 struct puffs_node *pn; 141 int error; 142 143 ps = puffs_getspecific(pu); 144 pn = (struct puffs_node *)opc; 145 pnd = PERFUSE_NODE_DATA(pn); 146 147 if (PN_ISDIR(opc)) { 148 op = FUSE_RELEASEDIR; 149 mode = FREAD; 150 } else { 151 op = FUSE_RELEASE; 152 } 153 154 /* 155 * Destroy the filehandle before sending the 156 * request to the FUSE filesystem, otherwise 157 * we may get a second close() while we wait 158 * for the reply, and we would end up closing 159 * the same fh twice instead of closng both. 160 */ 161 fh = perfuse_get_fh(opc, mode); 162 perfuse_destroy_fh(pn, fh); 163 164 /* 165 * release_flags may be set to FUSE_RELEASE_FLUSH 166 * to flush locks. lock_owner must be set in that case 167 * 168 * ps_new_msg() is called with NULL creds, which will 169 * be interpreted as FUSE superuser. We come here from the 170 * inactive method, which provides no creds, but obviously 171 * runs with kernel privilege. 172 */ 173 pm = ps->ps_new_msg(pu, opc, op, sizeof(*fri), NULL); 174 fri = GET_INPAYLOAD(ps, pm, fuse_release_in); 175 fri->fh = fh; 176 fri->flags = 0; 177 fri->release_flags = 0; 178 fri->lock_owner = pnd->pnd_lock_owner; 179 fri->flags = (fri->lock_owner != 0) ? FUSE_RELEASE_FLUSH : 0; 180 181 #ifdef PERFUSE_DEBUG 182 if (perfuse_diagflags & PDF_FH) 183 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", fh = 0x%"PRIx64"\n", 184 __func__, (void *)opc, pnd->pnd_nodeid, fri->fh); 185 #endif 186 187 if ((error = xchg_msg(pu, opc, pm, 188 NO_PAYLOAD_REPLY_LEN, wait_reply)) != 0) 189 DERRX(EX_SOFTWARE, "%s: freed fh = 0x%"PRIx64" but filesystem " 190 "returned error = %d", __func__, fh, error); 191 192 ps->ps_destroy_msg(pm); 193 194 return 0; 195 } 196 197 static int 198 xchg_msg(struct puffs_usermount *pu, puffs_cookie_t opc, perfuse_msg_t *pm, 199 size_t len, enum perfuse_xchg_pb_reply wait) 200 { 201 struct perfuse_state *ps; 202 struct perfuse_node_data *pnd; 203 struct perfuse_trace *pt = NULL; 204 int error; 205 206 ps = puffs_getspecific(pu); 207 pnd = NULL; 208 if ((struct puffs_node *)opc != NULL) 209 pnd = PERFUSE_NODE_DATA(opc); 210 211 #ifdef PERFUSE_DEBUG 212 if ((perfuse_diagflags & PDF_FILENAME) && (opc != 0)) 213 DPRINTF("file = \"%s\", ino = %"PRIu64" flags = 0x%x\n", 214 perfuse_node_path(ps, opc), 215 ((struct puffs_node *)opc)->pn_va.va_fileid, 216 PERFUSE_NODE_DATA(opc)->pnd_flags); 217 #endif 218 ps->ps_xchgcount++; 219 if (pnd) 220 pnd->pnd_inxchg++; 221 222 /* 223 * Record FUSE call start if requested 224 */ 225 if (perfuse_diagflags & PDF_TRACE) 226 pt = perfuse_trace_begin(ps, opc, pm); 227 228 /* 229 * Do actual FUSE exchange 230 */ 231 if ((error = ps->ps_xchg_msg(pu, pm, len, wait)) != 0) 232 ps->ps_destroy_msg(pm); 233 234 /* 235 * Record FUSE call end if requested 236 */ 237 if (pt != NULL) 238 perfuse_trace_end(ps, pt, error); 239 240 ps->ps_xchgcount--; 241 if (pnd) { 242 pnd->pnd_inxchg--; 243 (void)dequeue_requests(opc, PCQ_AFTERXCHG, DEQUEUE_ALL); 244 } 245 246 return error; 247 } 248 249 static int 250 mode_access(puffs_cookie_t opc, const struct puffs_cred *pcr, mode_t mode) 251 { 252 struct puffs_node *pn; 253 struct vattr *va; 254 255 /* 256 * pcr is NULL for self open through fsync or readdir. 257 * In both case, access control is useless, as it was 258 * done before, at open time. 259 */ 260 if (pcr == NULL) 261 return 0; 262 263 pn = (struct puffs_node *)opc; 264 va = puffs_pn_getvap(pn); 265 return puffs_access(va->va_type, va->va_mode, 266 va->va_uid, va->va_gid, 267 mode, pcr); 268 } 269 270 static int 271 sticky_access(puffs_cookie_t opc, struct puffs_node *targ, 272 const struct puffs_cred *pcr) 273 { 274 uid_t uid; 275 int sticky, owner, parent_owner; 276 277 /* 278 * This covers the case where the kernel requests a DELETE 279 * or RENAME on its own, and where puffs_cred_getuid would 280 * return -1. While such a situation should not happen, 281 * we allow it here. 282 * 283 * This also allows root to tamper with other users' files 284 * that have the sticky bit. 285 */ 286 if (puffs_cred_isjuggernaut(pcr)) 287 return 0; 288 289 if (puffs_cred_getuid(pcr, &uid) != 0) 290 DERRX(EX_SOFTWARE, "puffs_cred_getuid fails in %s", __func__); 291 292 sticky = puffs_pn_getvap(opc)->va_mode & S_ISTXT; 293 owner = puffs_pn_getvap(targ)->va_uid == uid; 294 parent_owner = puffs_pn_getvap(opc)->va_uid == uid; 295 296 if (sticky && !owner && !parent_owner) 297 return EPERM; 298 299 return 0; 300 } 301 302 303 static void 304 fuse_attr_to_vap(struct perfuse_state *ps, struct vattr *vap, 305 struct fuse_attr *fa) 306 { 307 vap->va_type = IFTOVT(fa->mode); 308 vap->va_mode = fa->mode & ALLPERMS; 309 vap->va_nlink = fa->nlink; 310 vap->va_uid = fa->uid; 311 vap->va_gid = fa->gid; 312 vap->va_fsid = (long)ps->ps_fsid; 313 vap->va_fileid = fa->ino; 314 vap->va_size = fa->size; 315 vap->va_blocksize = fa->blksize; 316 vap->va_atime.tv_sec = (time_t)fa->atime; 317 vap->va_atime.tv_nsec = (long) fa->atimensec; 318 vap->va_mtime.tv_sec = (time_t)fa->mtime; 319 vap->va_mtime.tv_nsec = (long)fa->mtimensec; 320 vap->va_ctime.tv_sec = (time_t)fa->ctime; 321 vap->va_ctime.tv_nsec = (long)fa->ctimensec; 322 vap->va_birthtime.tv_sec = 0; 323 vap->va_birthtime.tv_nsec = 0; 324 vap->va_gen = 0; 325 vap->va_flags = 0; 326 vap->va_rdev = fa->rdev; 327 vap->va_bytes = fa->blocks * S_BLKSIZE; 328 vap->va_filerev = (u_quad_t)PUFFS_VNOVAL; 329 vap->va_vaflags = 0; 330 331 if (vap->va_blocksize == 0) 332 vap->va_blocksize = DEV_BSIZE; 333 334 if (vap->va_size == (size_t)PUFFS_VNOVAL) /* XXX */ 335 vap->va_size = 0; 336 337 return; 338 } 339 340 #ifdef PUFFS_KFLAG_CACHE_FS_TTL 341 static void 342 perfuse_newinfo_setttl(struct puffs_newinfo *pni, 343 struct puffs_node *pn, struct fuse_entry_out *feo, 344 struct fuse_attr_out *fao) 345 { 346 #ifdef PERFUSE_DEBUG 347 if ((feo == NULL) && (fao == NULL)) 348 DERRX(EX_SOFTWARE, "%s: feo and fao NULL", __func__); 349 350 if ((feo != NULL) && (fao != NULL)) 351 DERRX(EX_SOFTWARE, "%s: feo and fao != NULL", __func__); 352 #endif /* PERFUSE_DEBUG */ 353 354 if (fao != NULL) { 355 struct timespec va_ttl; 356 357 va_ttl.tv_sec = fao->attr_valid; 358 va_ttl.tv_nsec = fao->attr_valid_nsec; 359 360 puffs_newinfo_setvattl(pni, &va_ttl); 361 } 362 363 if (feo != NULL) { 364 struct timespec va_ttl; 365 struct timespec cn_ttl; 366 struct timespec now; 367 struct perfuse_node_data *pnd = PERFUSE_NODE_DATA(pn); 368 369 va_ttl.tv_sec = feo->attr_valid; 370 va_ttl.tv_nsec = feo->attr_valid_nsec; 371 cn_ttl.tv_sec = feo->entry_valid; 372 cn_ttl.tv_nsec = feo->entry_valid_nsec; 373 374 puffs_newinfo_setvattl(pni, &va_ttl); 375 puffs_newinfo_setcnttl(pni, &cn_ttl); 376 377 if (clock_gettime(CLOCK_REALTIME, &now) != 0) 378 DERR(EX_OSERR, "clock_gettime failed"); 379 380 timespecadd(&now, &cn_ttl, &pnd->pnd_cn_expire); 381 } 382 383 return; 384 } 385 #endif /* PUFFS_KFLAG_CACHE_FS_TTL */ 386 387 static int 388 node_lookup_common(struct puffs_usermount *pu, puffs_cookie_t opc, 389 struct puffs_newinfo *pni, const char *path, 390 const struct puffs_cred *pcr, struct puffs_node **pnp) 391 { 392 struct perfuse_state *ps; 393 struct perfuse_node_data *oldpnd; 394 perfuse_msg_t *pm; 395 struct fuse_entry_out *feo; 396 struct puffs_node *pn; 397 size_t len; 398 int error; 399 400 /* 401 * Prevent further lookups if the parent was removed 402 */ 403 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 404 return ESTALE; 405 406 if (pnp == NULL) 407 DERRX(EX_SOFTWARE, "pnp must be != NULL"); 408 409 ps = puffs_getspecific(pu); 410 411 #ifdef PERFUSE_DEBUG 412 if (perfuse_diagflags & PDF_FILENAME) 413 DPRINTF("%s: opc = %p, file = \"%s\" looking up \"%s\"\n", 414 __func__, (void *)opc, 415 perfuse_node_path(ps, opc), path); 416 417 if (strcmp(path, ".") == 0) 418 DERRX(EX_SOFTWARE, "unexpected dot-lookup"); 419 420 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_RECLAIMED) 421 DERRX(EX_SOFTWARE, 422 "looking up reclaimed node opc = %p, name = \"%s\"", 423 opc, path); 424 425 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_INVALID) 426 DERRX(EX_SOFTWARE, 427 "looking up freed node opc = %p, name = \"%s\"", 428 opc, path); 429 #endif /* PERFUSE_DEBUG */ 430 431 len = strlen(path) + 1; 432 pm = ps->ps_new_msg(pu, opc, FUSE_LOOKUP, len, pcr); 433 (void)strlcpy(_GET_INPAYLOAD(ps, pm, char *), path, len); 434 435 if ((error = xchg_msg(pu, opc, pm, sizeof(*feo), wait_reply)) != 0) 436 return error; 437 438 feo = GET_OUTPAYLOAD(ps, pm, fuse_entry_out); 439 440 /* 441 * Starting with ABI 7.4, inode number 0 means ENOENT, 442 * with entry_valid / entry_valid_nsec giving negative 443 * cache timeout (which we do not implement yet). 444 */ 445 if (feo->attr.ino == 0) { 446 ps->ps_destroy_msg(pm); 447 return ENOENT; 448 } 449 450 /* 451 * Check for a known node, not reclaimed, with another name. 452 * It may have been moved, or we can lookup ../ 453 */ 454 if (((oldpnd = perfuse_node_bynodeid(ps, feo->nodeid)) != NULL) && 455 !(oldpnd->pnd_flags & PND_RECLAIMED)) { 456 /* 457 * Save the new node name if not .. 458 */ 459 if (strncmp(path, "..", len) != 0) 460 (void)strlcpy(oldpnd->pnd_name, 461 path, MAXPATHLEN); 462 pn = oldpnd->pnd_pn; 463 464 } else { 465 pn = perfuse_new_pn(pu, path, opc); 466 PERFUSE_NODE_DATA(pn)->pnd_nodeid = feo->nodeid; 467 perfuse_node_cache(ps, pn); 468 } 469 470 #ifdef PERFUSE_DEBUG 471 if (PERFUSE_NODE_DATA(pn)->pnd_flags & PND_RECLAIMED) 472 DERRX(EX_SOFTWARE, 473 "reclaimed in lookup opc = %p, name = \"%s\", ck = %p", 474 opc, path, pn); 475 476 if (PERFUSE_NODE_DATA(pn)->pnd_flags & PND_INVALID) 477 DERRX(EX_SOFTWARE, 478 "freed in lookup opc = %p, name = \"%s\", ck = %p", 479 opc, path, pn); 480 #endif /* PERFUSE_DEBUG */ 481 482 fuse_attr_to_vap(ps, &pn->pn_va, &feo->attr); 483 pn->pn_va.va_gen = (u_long)(feo->generation); 484 PERFUSE_NODE_DATA(pn)->pnd_fuse_nlookup++; 485 PERFUSE_NODE_DATA(pn)->pnd_puffs_nlookup++; 486 487 *pnp = pn; 488 489 #ifdef PERFUSE_DEBUG 490 if (perfuse_diagflags & PDF_FILENAME) 491 DPRINTF("%s: opc = %p, looked up opc = %p, " 492 "nodeid = 0x%"PRIx64" file = \"%s\"\n", __func__, 493 (void *)opc, pn, feo->nodeid, path); 494 #endif 495 496 if (pni != NULL) { 497 #ifdef PUFFS_KFLAG_CACHE_FS_TTL 498 puffs_newinfo_setva(pni, &pn->pn_va); 499 perfuse_newinfo_setttl(pni, pn, feo, NULL); 500 #endif /* PUFFS_KFLAG_CACHE_FS_TTL */ 501 puffs_newinfo_setcookie(pni, pn); 502 puffs_newinfo_setvtype(pni, pn->pn_va.va_type); 503 puffs_newinfo_setsize(pni, (voff_t)pn->pn_va.va_size); 504 puffs_newinfo_setrdev(pni, pn->pn_va.va_rdev); 505 } 506 507 ps->ps_destroy_msg(pm); 508 509 return 0; 510 } 511 512 513 /* 514 * Common code for methods that create objects: 515 * perfuse_node_mkdir 516 * perfuse_node_mknod 517 * perfuse_node_symlink 518 */ 519 static int 520 node_mk_common(struct puffs_usermount *pu, puffs_cookie_t opc, 521 struct puffs_newinfo *pni, const struct puffs_cn *pcn, 522 perfuse_msg_t *pm) 523 { 524 struct perfuse_state *ps; 525 struct puffs_node *pn; 526 struct fuse_entry_out *feo; 527 int error; 528 529 ps = puffs_getspecific(pu); 530 531 if ((error = xchg_msg(pu, opc, pm, sizeof(*feo), wait_reply)) != 0) 532 return error; 533 534 feo = GET_OUTPAYLOAD(ps, pm, fuse_entry_out); 535 if (feo->nodeid == PERFUSE_UNKNOWN_NODEID) 536 DERRX(EX_SOFTWARE, "%s: no nodeid", __func__); 537 538 pn = perfuse_new_pn(pu, pcn->pcn_name, opc); 539 PERFUSE_NODE_DATA(pn)->pnd_nodeid = feo->nodeid; 540 PERFUSE_NODE_DATA(pn)->pnd_fuse_nlookup++; 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 if (strcmp(name, "..") == 0) { 655 /* 656 * Avoid breaking out of fs 657 * by lookup to .. on root 658 */ 659 if (pnd->pnd_nodeid == FUSE_ROOT_ID) 660 fd->ino = FUSE_ROOT_ID; 661 else 662 fd->ino = pnd->pnd_parent_nodeid; 663 } else if (strcmp(name, ".") == 0 ) { 664 fd->ino = pnd->pnd_nodeid; 665 } else { 666 int error; 667 668 error = node_lookup_common(pu, opc, NULL, 669 name, NULL, &pn); 670 if (error != 0) { 671 DWARNX("node_lookup_common %s " 672 "failed: %d", name, error); 673 } else { 674 fd->ino = pn->pn_va.va_fileid; 675 (void)perfuse_node_reclaim2(pu, pn, 1); 676 } 677 } 678 } 679 680 dents->d_fileno = fd->ino; 681 dents->d_reclen = (unsigned short)reclen; 682 dents->d_namlen = fd->namelen; 683 dents->d_type = fd->type; 684 strlcpy(dents->d_name, name, fd->namelen + 1); 685 686 #ifdef PERFUSE_DEBUG 687 if (perfuse_diagflags & PDF_READDIR) 688 DPRINTF("%s: translated \"%s\" ino = %"PRIu64"\n", 689 __func__, dents->d_name, dents->d_fileno); 690 #endif 691 692 dents = _DIRENT_NEXT(dents); 693 written += reclen; 694 695 /* 696 * Move to the next record. 697 * fd->off is not the offset, it is an opaque cookie 698 * given by the filesystem to keep state across multiple 699 * readdir() operation. 700 * Use record alignment instead. 701 */ 702 len = FUSE_DIRENT_ALIGN(sizeof(*fd) + fd->namelen); 703 #ifdef PERFUSE_DEBUG 704 if (perfuse_diagflags & PDF_READDIR) 705 DPRINTF("%s: record at %"PRId64"/0x%"PRIx64" " 706 "length = %zd/0x%zx. " 707 "next record at %"PRId64"/0x%"PRIx64" " 708 "max %zd/0x%zx\n", 709 __func__, fd_offset, fd_offset, len, len, 710 fd_offset + len, fd_offset + len, 711 fd_len, fd_len); 712 #endif 713 fd_offset += len; 714 715 /* 716 * Check if next record is still within the packet 717 * If it is not, we reached the end of the buffer. 718 */ 719 if (fd_offset >= fd_len) 720 break; 721 722 /* 723 * (void *) for delint 724 */ 725 ndp = (char *)(void *)fd_base + (size_t)fd_offset; 726 fd = (struct fuse_dirent *)(void *)ndp; 727 728 } while (1 /* CONSTCOND */); 729 730 /* 731 * Adjust the dirent output length 732 */ 733 if (written != -1) 734 PERFUSE_NODE_DATA(opc)->pnd_dirent_len = written; 735 736 return written; 737 } 738 739 static void 740 readdir_buffered(puffs_cookie_t opc, struct dirent *dent, off_t *readoff, 741 size_t *reslen) 742 { 743 struct dirent *fromdent; 744 struct perfuse_node_data *pnd; 745 char *ndp; 746 747 pnd = PERFUSE_NODE_DATA(opc); 748 749 while (*readoff < pnd->pnd_dirent_len) { 750 /* 751 * (void *) for delint 752 */ 753 ndp = (char *)(void *)pnd->pnd_dirent + (size_t)*readoff; 754 fromdent = (struct dirent *)(void *)ndp; 755 756 if (*reslen < _DIRENT_SIZE(fromdent)) 757 break; 758 759 memcpy(dent, fromdent, _DIRENT_SIZE(fromdent)); 760 *readoff += _DIRENT_SIZE(fromdent); 761 *reslen -= _DIRENT_SIZE(fromdent); 762 763 dent = _DIRENT_NEXT(dent); 764 } 765 766 #ifdef PERFUSE_DEBUG 767 if (perfuse_diagflags & PDF_READDIR) 768 DPRINTF("%s: readoff = %"PRId64", " 769 "pnd->pnd_dirent_len = %"PRId64"\n", 770 __func__, *readoff, pnd->pnd_dirent_len); 771 #endif 772 if (*readoff >= pnd->pnd_dirent_len) { 773 free(pnd->pnd_dirent); 774 pnd->pnd_dirent = NULL; 775 pnd->pnd_dirent_len = 0; 776 } 777 778 return; 779 } 780 781 782 static void 783 node_ref(puffs_cookie_t opc) 784 { 785 struct perfuse_node_data *pnd = PERFUSE_NODE_DATA(opc); 786 787 #ifdef PERFUSE_DEBUG 788 if (pnd->pnd_flags & PND_INVALID) 789 DERRX(EX_SOFTWARE, "Use of freed node opc = %p", opc); 790 #endif /* PERFUSE_DEBUG */ 791 792 pnd->pnd_ref++; 793 return; 794 } 795 796 static void 797 node_rele(puffs_cookie_t opc) 798 { 799 struct perfuse_node_data *pnd = PERFUSE_NODE_DATA(opc); 800 801 #ifdef PERFUSE_DEBUG 802 if (pnd->pnd_flags & PND_INVALID) 803 DERRX(EX_SOFTWARE, "Use of freed node opc = %p", opc); 804 #endif /* PERFUSE_DEBUG */ 805 806 pnd->pnd_ref--; 807 808 if (pnd->pnd_ref == 0) 809 (void)dequeue_requests(opc, PCQ_REF, DEQUEUE_ALL); 810 811 return; 812 } 813 814 static void 815 requeue_request(struct puffs_usermount *pu, puffs_cookie_t opc, 816 enum perfuse_qtype type) 817 { 818 struct perfuse_cc_queue pcq; 819 struct perfuse_node_data *pnd; 820 821 pnd = PERFUSE_NODE_DATA(opc); 822 pcq.pcq_type = type; 823 pcq.pcq_cc = puffs_cc_getcc(pu); 824 TAILQ_INSERT_TAIL(&pnd->pnd_pcq, &pcq, pcq_next); 825 826 #ifdef PERFUSE_DEBUG 827 if (perfuse_diagflags & PDF_REQUEUE) 828 DPRINTF("%s: REQUEUE opc = %p, pcc = %p (%s)\n", 829 __func__, (void *)opc, pcq.pcq_cc, 830 perfuse_qtypestr[type]); 831 #endif 832 833 puffs_cc_yield(pcq.pcq_cc); 834 TAILQ_REMOVE(&pnd->pnd_pcq, &pcq, pcq_next); 835 836 #ifdef PERFUSE_DEBUG 837 if (perfuse_diagflags & PDF_REQUEUE) 838 DPRINTF("%s: RESUME opc = %p, pcc = %p (%s)\n", 839 __func__, (void *)opc, pcq.pcq_cc, 840 perfuse_qtypestr[type]); 841 #endif 842 843 return; 844 } 845 846 static int 847 dequeue_requests(puffs_cookie_t opc, enum perfuse_qtype type, int max) 848 { 849 struct perfuse_cc_queue *pcq; 850 struct perfuse_node_data *pnd; 851 int dequeued; 852 853 pnd = PERFUSE_NODE_DATA(opc); 854 dequeued = 0; 855 TAILQ_FOREACH(pcq, &pnd->pnd_pcq, pcq_next) { 856 if (pcq->pcq_type != type) 857 continue; 858 859 #ifdef PERFUSE_DEBUG 860 if (perfuse_diagflags & PDF_REQUEUE) 861 DPRINTF("%s: SCHEDULE opc = %p, pcc = %p (%s)\n", 862 __func__, (void *)opc, pcq->pcq_cc, 863 perfuse_qtypestr[type]); 864 #endif 865 puffs_cc_schedule(pcq->pcq_cc); 866 867 if (++dequeued == max) 868 break; 869 } 870 871 #ifdef PERFUSE_DEBUG 872 if (perfuse_diagflags & PDF_REQUEUE) 873 DPRINTF("%s: DONE opc = %p\n", __func__, (void *)opc); 874 #endif 875 876 return dequeued; 877 } 878 879 void 880 perfuse_fs_init(struct puffs_usermount *pu) 881 { 882 struct perfuse_state *ps; 883 perfuse_msg_t *pm; 884 struct fuse_init_in *fii; 885 struct fuse_init_out *fio; 886 int error; 887 888 ps = puffs_getspecific(pu); 889 890 if (puffs_mount(pu, ps->ps_target, ps->ps_mountflags, ps->ps_root) != 0) 891 DERR(EX_OSERR, "%s: puffs_mount failed", __func__); 892 893 /* 894 * Linux 2.6.34.1 sends theses flags: 895 * FUSE_ASYNC_READ | FUSE_POSIX_LOCKS | FUSE_ATOMIC_O_TRUNC 896 * FUSE_EXPORT_SUPPORT | FUSE_BIG_WRITES | FUSE_DONT_MASK 897 * 898 * Linux also sets max_readahead at 32 pages (128 kB) 899 * 900 * ps_new_msg() is called with NULL creds, which will 901 * be interpreted as FUSE superuser. 902 */ 903 pm = ps->ps_new_msg(pu, 0, FUSE_INIT, sizeof(*fii), NULL); 904 fii = GET_INPAYLOAD(ps, pm, fuse_init_in); 905 fii->major = FUSE_KERNEL_VERSION; 906 fii->minor = FUSE_KERNEL_MINOR_VERSION; 907 fii->max_readahead = (unsigned int)(32 * sysconf(_SC_PAGESIZE)); 908 fii->flags = (FUSE_ASYNC_READ|FUSE_POSIX_LOCKS|FUSE_ATOMIC_O_TRUNC); 909 910 if ((error = xchg_msg(pu, 0, pm, sizeof(*fio), wait_reply)) != 0) 911 DERRX(EX_SOFTWARE, "init message exchange failed (%d)", error); 912 913 fio = GET_OUTPAYLOAD(ps, pm, fuse_init_out); 914 ps->ps_max_readahead = fio->max_readahead; 915 ps->ps_max_write = fio->max_write; 916 917 ps->ps_destroy_msg(pm); 918 919 return; 920 } 921 922 int 923 perfuse_fs_unmount(struct puffs_usermount *pu, int flags) 924 { 925 perfuse_msg_t *pm; 926 struct perfuse_state *ps; 927 puffs_cookie_t opc; 928 int error; 929 930 ps = puffs_getspecific(pu); 931 opc = (puffs_cookie_t)puffs_getroot(pu); 932 933 /* 934 * ps_new_msg() is called with NULL creds, which will 935 * be interpreted as FUSE superuser. 936 */ 937 pm = ps->ps_new_msg(pu, opc, FUSE_DESTROY, 0, NULL); 938 939 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0){ 940 DWARN("unmount %s", ps->ps_target); 941 if (!(flags & MNT_FORCE)) 942 return error; 943 else 944 error = 0; 945 } else { 946 ps->ps_destroy_msg(pm); 947 } 948 949 ps->ps_umount(pu); 950 951 if (perfuse_diagflags & PDF_MISC) 952 DPRINTF("%s unmounted, exit\n", ps->ps_target); 953 954 return 0; 955 } 956 957 int 958 perfuse_fs_statvfs(struct puffs_usermount *pu, struct puffs_statvfs *svfsb) 959 { 960 struct perfuse_state *ps; 961 perfuse_msg_t *pm; 962 puffs_cookie_t opc; 963 struct fuse_statfs_out *fso; 964 int error; 965 966 ps = puffs_getspecific(pu); 967 opc = (puffs_cookie_t)puffs_getroot(pu); 968 969 /* 970 * ps_new_msg() is called with NULL creds, which will 971 * be interpreted as FUSE superuser. 972 */ 973 pm = ps->ps_new_msg(pu, opc, FUSE_STATFS, 0, NULL); 974 975 if ((error = xchg_msg(pu, opc, pm, sizeof(*fso), wait_reply)) != 0) 976 return error; 977 978 fso = GET_OUTPAYLOAD(ps, pm, fuse_statfs_out); 979 svfsb->f_flag = ps->ps_mountflags; 980 svfsb->f_bsize = fso->st.bsize; 981 svfsb->f_frsize = fso->st.frsize; 982 svfsb->f_iosize = ((struct puffs_node *)opc)->pn_va.va_blocksize; 983 svfsb->f_blocks = fso->st.blocks; 984 svfsb->f_bfree = fso->st.bfree; 985 svfsb->f_bavail = fso->st.bavail; 986 svfsb->f_bresvd = fso->st.bfree - fso->st.bavail; 987 svfsb->f_files = fso->st.files; 988 svfsb->f_ffree = fso->st.ffree; 989 svfsb->f_favail = fso->st.ffree;/* files not reserved for root */ 990 svfsb->f_fresvd = 0; /* files reserved for root */ 991 992 svfsb->f_syncreads = ps->ps_syncreads; 993 svfsb->f_syncwrites = ps->ps_syncwrites; 994 995 svfsb->f_asyncreads = ps->ps_asyncreads; 996 svfsb->f_asyncwrites = ps->ps_asyncwrites; 997 998 (void)memcpy(&svfsb->f_fsidx, &ps->ps_fsid, sizeof(ps->ps_fsid)); 999 svfsb->f_fsid = (unsigned long)ps->ps_fsid; 1000 svfsb->f_namemax = MAXPATHLEN; /* XXX */ 1001 svfsb->f_owner = ps->ps_owner_uid; 1002 1003 (void)strlcpy(svfsb->f_mntonname, ps->ps_target, _VFS_NAMELEN); 1004 1005 if (ps->ps_filesystemtype != NULL) 1006 (void)strlcpy(svfsb->f_fstypename, 1007 ps->ps_filesystemtype, _VFS_NAMELEN); 1008 else 1009 (void)strlcpy(svfsb->f_fstypename, "fuse", _VFS_NAMELEN); 1010 1011 if (ps->ps_source != NULL) 1012 strlcpy(svfsb->f_mntfromname, ps->ps_source, _VFS_NAMELEN); 1013 else 1014 strlcpy(svfsb->f_mntfromname, _PATH_FUSE, _VFS_NAMELEN); 1015 1016 ps->ps_destroy_msg(pm); 1017 1018 return 0; 1019 } 1020 1021 int 1022 perfuse_fs_sync(struct puffs_usermount *pu, int waitfor, 1023 const struct puffs_cred *pcr) 1024 { 1025 /* 1026 * FUSE does not seem to have a FS sync callback. 1027 * Maybe do not even register this callback 1028 */ 1029 return puffs_fsnop_sync(pu, waitfor, pcr); 1030 } 1031 1032 /* ARGSUSED0 */ 1033 int 1034 perfuse_fs_fhtonode(struct puffs_usermount *pu, void *fid, size_t fidsize, 1035 struct puffs_newinfo *pni) 1036 { 1037 DERRX(EX_SOFTWARE, "%s: UNIMPLEMENTED (FATAL)", __func__); 1038 return 0; 1039 } 1040 1041 /* ARGSUSED0 */ 1042 int 1043 perfuse_fs_nodetofh(struct puffs_usermount *pu, puffs_cookie_t cookie, 1044 void *fid, size_t *fidsize) 1045 { 1046 DERRX(EX_SOFTWARE, "%s: UNIMPLEMENTED (FATAL)", __func__); 1047 return 0; 1048 } 1049 1050 #if 0 1051 /* ARGSUSED0 */ 1052 void 1053 perfuse_fs_extattrctl(struct puffs_usermount *pu, int cmd, 1054 puffs_cookie_t *cookie, int flags, int namespace, const char *attrname) 1055 { 1056 DERRX(EX_SOFTWARE, "%s: UNIMPLEMENTED (FATAL)", __func__); 1057 return 0; 1058 } 1059 #endif /* 0 */ 1060 1061 /* ARGSUSED0 */ 1062 void 1063 perfuse_fs_suspend(struct puffs_usermount *pu, int status) 1064 { 1065 return; 1066 } 1067 1068 1069 int 1070 perfuse_node_lookup(struct puffs_usermount *pu, puffs_cookie_t opc, 1071 struct puffs_newinfo *pni, const struct puffs_cn *pcn) 1072 { 1073 struct perfuse_state *ps; 1074 struct puffs_node *pn; 1075 mode_t mode; 1076 int error; 1077 1078 ps = puffs_getspecific(pu); 1079 node_ref(opc); 1080 1081 /* 1082 * Check permissions 1083 */ 1084 switch(pcn->pcn_nameiop) { 1085 case NAMEI_DELETE: /* FALLTHROUGH */ 1086 case NAMEI_RENAME: /* FALLTHROUGH */ 1087 case NAMEI_CREATE: 1088 if (pcn->pcn_flags & NAMEI_ISLASTCN) 1089 mode = PUFFS_VEXEC|PUFFS_VWRITE; 1090 else 1091 mode = PUFFS_VEXEC; 1092 break; 1093 case NAMEI_LOOKUP: /* FALLTHROUGH */ 1094 default: 1095 mode = PUFFS_VEXEC; 1096 break; 1097 } 1098 1099 if ((error = mode_access(opc, pcn->pcn_cred, mode)) != 0) 1100 goto out; 1101 1102 error = node_lookup_common(pu, (puffs_cookie_t)opc, pni, 1103 pcn->pcn_name, pcn->pcn_cred, &pn); 1104 1105 if (error != 0) 1106 goto out; 1107 1108 /* 1109 * Kernel would kill us if the filesystem returned the parent 1110 * itself. If we want to live, hide that! 1111 */ 1112 if ((opc == (puffs_cookie_t)pn) && (strcmp(pcn->pcn_name, ".") != 0)) { 1113 DERRX(EX_SOFTWARE, "lookup \"%s\" in \"%s\" returned parent", 1114 pcn->pcn_name, perfuse_node_path(ps, opc)); 1115 /* NOTREACHED */ 1116 error = ESTALE; 1117 goto out; 1118 } 1119 1120 /* 1121 * Removed node 1122 */ 1123 if (PERFUSE_NODE_DATA(pn)->pnd_flags & PND_REMOVED) { 1124 error = ENOENT; 1125 goto out; 1126 } 1127 1128 /* 1129 * Check for sticky bit. Unfortunately there is no way to 1130 * do this before creating the puffs_node, since we require 1131 * this operation to get the node owner. 1132 */ 1133 switch (pcn->pcn_nameiop) { 1134 case NAMEI_DELETE: /* FALLTHROUGH */ 1135 case NAMEI_RENAME: 1136 error = sticky_access(opc, pn, pcn->pcn_cred); 1137 if (error != 0) { 1138 (void)perfuse_node_reclaim2(pu, pn, 1); 1139 goto out; 1140 } 1141 break; 1142 default: 1143 break; 1144 } 1145 1146 PERFUSE_NODE_DATA(pn)->pnd_fuse_nlookup++; 1147 PERFUSE_NODE_DATA(pn)->pnd_puffs_nlookup++; 1148 1149 error = 0; 1150 1151 out: 1152 node_rele(opc); 1153 return error; 1154 } 1155 1156 int 1157 perfuse_node_create(struct puffs_usermount *pu, puffs_cookie_t opc, 1158 struct puffs_newinfo *pni, const struct puffs_cn *pcn, 1159 const struct vattr *vap) 1160 { 1161 perfuse_msg_t *pm; 1162 struct perfuse_state *ps; 1163 struct fuse_create_in *fci; 1164 struct fuse_entry_out *feo; 1165 struct fuse_open_out *foo; 1166 struct puffs_node *pn; 1167 const char *name; 1168 size_t namelen; 1169 size_t len; 1170 int error; 1171 1172 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 1173 return ENOENT; 1174 1175 node_ref(opc); 1176 1177 /* 1178 * If create is unimplemented: Check that it does not 1179 * already exists, and if not, do mknod and open 1180 */ 1181 ps = puffs_getspecific(pu); 1182 if (ps->ps_flags & PS_NO_CREAT) { 1183 error = node_lookup_common(pu, opc, NULL, pcn->pcn_name, 1184 pcn->pcn_cred, &pn); 1185 if (error == 0) { 1186 (void)perfuse_node_reclaim2(pu, pn, 1); 1187 error = EEXIST; 1188 goto out; 1189 } 1190 1191 error = perfuse_node_mknod(pu, opc, pni, pcn, vap); 1192 if (error != 0) 1193 goto out; 1194 1195 error = node_lookup_common(pu, opc, NULL, pcn->pcn_name, 1196 pcn->pcn_cred, &pn); 1197 if (error != 0) 1198 goto out; 1199 1200 /* 1201 * FUSE does the open at create time, while 1202 * NetBSD will open in a subsequent operation. 1203 * We need to open now, in order to retain FUSE 1204 * semantics. The calling process will not get 1205 * a file descriptor before the kernel sends 1206 * the open operation. 1207 */ 1208 error = perfuse_node_open(pu, (puffs_cookie_t)pn, 1209 FWRITE, pcn->pcn_cred); 1210 goto out; 1211 } 1212 1213 name = pcn->pcn_name; 1214 namelen = pcn->pcn_namelen + 1; 1215 len = sizeof(*fci) + namelen; 1216 1217 /* 1218 * flags should use O_WRONLY instead of O_RDWR, but it 1219 * breaks when the caller tries to read from file. 1220 * 1221 * mode must contain file type (ie: S_IFREG), use VTTOIF(vap->va_type) 1222 */ 1223 pm = ps->ps_new_msg(pu, opc, FUSE_CREATE, len, pcn->pcn_cred); 1224 fci = GET_INPAYLOAD(ps, pm, fuse_create_in); 1225 fci->flags = O_CREAT | O_TRUNC | O_RDWR; 1226 fci->mode = vap->va_mode | VTTOIF(vap->va_type); 1227 fci->umask = 0; /* Seems unused by libfuse */ 1228 (void)strlcpy((char*)(void *)(fci + 1), name, namelen); 1229 1230 len = sizeof(*feo) + sizeof(*foo); 1231 if ((error = xchg_msg(pu, opc, pm, len, wait_reply)) != 0) { 1232 /* 1233 * create is unimplemented, remember it for later, 1234 * and start over using mknod and open instead. 1235 */ 1236 if (error == ENOSYS) { 1237 ps->ps_flags |= PS_NO_CREAT; 1238 error = perfuse_node_create(pu, opc, pni, pcn, vap); 1239 } 1240 1241 goto out; 1242 } 1243 1244 feo = GET_OUTPAYLOAD(ps, pm, fuse_entry_out); 1245 foo = (struct fuse_open_out *)(void *)(feo + 1); 1246 if (feo->nodeid == PERFUSE_UNKNOWN_NODEID) 1247 DERRX(EX_SOFTWARE, "%s: no nodeid", __func__); 1248 1249 /* 1250 * Save the file handle and inode in node private data 1251 * so that we can reuse it later 1252 */ 1253 pn = perfuse_new_pn(pu, name, opc); 1254 perfuse_new_fh((puffs_cookie_t)pn, foo->fh, FWRITE); 1255 PERFUSE_NODE_DATA(pn)->pnd_nodeid = feo->nodeid; 1256 PERFUSE_NODE_DATA(pn)->pnd_fuse_nlookup++; 1257 PERFUSE_NODE_DATA(pn)->pnd_puffs_nlookup++; 1258 perfuse_node_cache(ps, pn); 1259 1260 fuse_attr_to_vap(ps, &pn->pn_va, &feo->attr); 1261 pn->pn_va.va_gen = (u_long)(feo->generation); 1262 1263 puffs_newinfo_setcookie(pni, pn); 1264 #ifdef PUFFS_KFLAG_CACHE_FS_TTL 1265 puffs_newinfo_setva(pni, &pn->pn_va); 1266 perfuse_newinfo_setttl(pni, pn, feo, NULL); 1267 #endif /* PUFFS_KFLAG_CACHE_FS_TTL */ 1268 1269 #ifdef PERFUSE_DEBUG 1270 if (perfuse_diagflags & (PDF_FH|PDF_FILENAME)) 1271 DPRINTF("%s: opc = %p, file = \"%s\", flags = 0x%x " 1272 "nodeid = 0x%"PRIx64", wfh = 0x%"PRIx64"\n", 1273 __func__, (void *)pn, pcn->pcn_name, 1274 PERFUSE_NODE_DATA(pn)->pnd_flags, feo->nodeid, 1275 foo->fh); 1276 #endif 1277 1278 ps->ps_destroy_msg(pm); 1279 error = 0; 1280 1281 out: 1282 node_rele(opc); 1283 return error; 1284 } 1285 1286 1287 int 1288 perfuse_node_mknod(struct puffs_usermount *pu, puffs_cookie_t opc, 1289 struct puffs_newinfo *pni, const struct puffs_cn *pcn, 1290 const struct vattr *vap) 1291 { 1292 struct perfuse_state *ps; 1293 perfuse_msg_t *pm; 1294 struct fuse_mknod_in *fmi; 1295 const char* path; 1296 size_t len; 1297 int error; 1298 1299 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 1300 return ENOENT; 1301 1302 node_ref(opc); 1303 1304 /* 1305 * Only superuser can mknod objects other than 1306 * directories, files, socks, fifo and links. 1307 * 1308 * Create an object require -WX permission in the parent directory 1309 */ 1310 switch (vap->va_type) { 1311 case VDIR: /* FALLTHROUGH */ 1312 case VREG: /* FALLTHROUGH */ 1313 case VFIFO: /* FALLTHROUGH */ 1314 case VSOCK: 1315 break; 1316 default: /* VNON, VBLK, VCHR, VBAD */ 1317 if (!puffs_cred_isjuggernaut(pcn->pcn_cred)) { 1318 error = EPERM; 1319 goto out; 1320 } 1321 break; 1322 } 1323 1324 1325 ps = puffs_getspecific(pu); 1326 path = pcn->pcn_name; 1327 len = sizeof(*fmi) + pcn->pcn_namelen + 1; 1328 1329 /* 1330 * mode must contain file type (ie: S_IFREG), use VTTOIF(vap->va_type) 1331 */ 1332 pm = ps->ps_new_msg(pu, opc, FUSE_MKNOD, len, pcn->pcn_cred); 1333 fmi = GET_INPAYLOAD(ps, pm, fuse_mknod_in); 1334 fmi->mode = vap->va_mode | VTTOIF(vap->va_type); 1335 fmi->rdev = (uint32_t)vap->va_rdev; 1336 fmi->umask = 0; /* Seems unused bu libfuse */ 1337 (void)strlcpy((char *)(void *)(fmi + 1), path, len - sizeof(*fmi)); 1338 1339 error = node_mk_common(pu, opc, pni, pcn, pm); 1340 1341 out: 1342 node_rele(opc); 1343 return error; 1344 } 1345 1346 1347 int 1348 perfuse_node_open(struct puffs_usermount *pu, puffs_cookie_t opc, int mode, 1349 const struct puffs_cred *pcr) 1350 { 1351 return perfuse_node_open2(pu, opc, mode, pcr, NULL); 1352 } 1353 1354 int 1355 perfuse_node_open2(struct puffs_usermount *pu, puffs_cookie_t opc, int mode, 1356 const struct puffs_cred *pcr, int *oflags) 1357 { 1358 struct perfuse_state *ps; 1359 struct perfuse_node_data *pnd; 1360 perfuse_msg_t *pm; 1361 mode_t fmode; 1362 int op; 1363 struct fuse_open_in *foi; 1364 struct fuse_open_out *foo; 1365 int error; 1366 1367 ps = puffs_getspecific(pu); 1368 pnd = PERFUSE_NODE_DATA(opc); 1369 error = 0; 1370 1371 if (pnd->pnd_flags & PND_REMOVED) 1372 return ENOENT; 1373 1374 node_ref(opc); 1375 1376 if (PN_ISDIR(opc)) 1377 op = FUSE_OPENDIR; 1378 else 1379 op = FUSE_OPEN; 1380 1381 /* 1382 * libfuse docs says 1383 * - O_CREAT and O_EXCL should never be set. 1384 * - O_TRUNC may be used if mount option atomic_o_trunc is used XXX 1385 * 1386 * O_APPEND makes no sense since FUSE always sends 1387 * the file offset for write operations. If the 1388 * filesystem uses pwrite(), O_APPEND would cause 1389 * the offset to be ignored and cause file corruption. 1390 */ 1391 mode &= ~(O_CREAT|O_EXCL|O_APPEND); 1392 1393 /* 1394 * Do not open twice, and do not reopen for reading 1395 * if we already have write handle. 1396 */ 1397 switch (mode & (FREAD|FWRITE)) { 1398 case FREAD: 1399 if (pnd->pnd_flags & (PND_RFH|PND_WFH)) 1400 goto out; 1401 break; 1402 case FWRITE: 1403 if (pnd->pnd_flags & PND_WFH) 1404 goto out; 1405 break; 1406 case FREAD|FWRITE: 1407 if (pnd->pnd_flags & PND_WFH) 1408 goto out; 1409 1410 /* 1411 * Corner case: if already open for reading (PND_RFH) 1412 * and re-opening FREAD|FWRITE, we need to reopen, 1413 * but only for writing. Note the change on mode 1414 * will only affect perfuse_new_fh() 1415 */ 1416 if (pnd->pnd_flags & PND_RFH) 1417 mode &= ~FREAD; 1418 break; 1419 default: 1420 DWARNX("open without either FREAD nor FWRITE"); 1421 error = EPERM; 1422 goto out; 1423 } 1424 1425 /* 1426 * Queue open on a node so that we do not open 1427 * twice. This would be better with read and 1428 * write distinguished. 1429 */ 1430 while (pnd->pnd_flags & PND_INOPEN) 1431 requeue_request(pu, opc, PCQ_OPEN); 1432 pnd->pnd_flags |= PND_INOPEN; 1433 1434 /* 1435 * Convert PUFFS mode to FUSE mode: convert FREAD/FWRITE 1436 * to O_RDONLY/O_WRONLY while perserving the other options. 1437 */ 1438 fmode = mode & ~(FREAD|FWRITE); 1439 fmode |= (mode & FWRITE) ? O_RDWR : O_RDONLY; 1440 1441 pm = ps->ps_new_msg(pu, opc, op, sizeof(*foi), pcr); 1442 foi = GET_INPAYLOAD(ps, pm, fuse_open_in); 1443 foi->flags = fmode; 1444 foi->unused = 0; 1445 1446 if ((error = xchg_msg(pu, opc, pm, sizeof(*foo), wait_reply)) != 0) 1447 goto out; 1448 1449 foo = GET_OUTPAYLOAD(ps, pm, fuse_open_out); 1450 1451 /* 1452 * Save the file handle in node private data 1453 * so that we can reuse it later 1454 */ 1455 perfuse_new_fh(opc, foo->fh, mode); 1456 1457 /* 1458 * Set direct I/O if the filesystems forces it 1459 */ 1460 if ((foo->open_flags & FUSE_FOPEN_DIRECT_IO) && (oflags != NULL)) 1461 *oflags |= PUFFS_OPEN_IO_DIRECT; 1462 1463 #ifdef PERFUSE_DEBUG 1464 if (perfuse_diagflags & (PDF_FH|PDF_FILENAME)) 1465 DPRINTF("%s: opc = %p, file = \"%s\", " 1466 "nodeid = 0x%"PRIx64", %s%sfh = 0x%"PRIx64"\n", 1467 __func__, (void *)opc, perfuse_node_path(ps, opc), 1468 pnd->pnd_nodeid, mode & FREAD ? "r" : "", 1469 mode & FWRITE ? "w" : "", foo->fh); 1470 #endif 1471 1472 ps->ps_destroy_msg(pm); 1473 out: 1474 1475 pnd->pnd_flags &= ~PND_INOPEN; 1476 (void)dequeue_requests(opc, PCQ_OPEN, DEQUEUE_ALL); 1477 1478 node_rele(opc); 1479 return error; 1480 } 1481 1482 /* ARGSUSED0 */ 1483 int 1484 perfuse_node_close(struct puffs_usermount *pu, puffs_cookie_t opc, int flags, 1485 const struct puffs_cred *pcr) 1486 { 1487 struct perfuse_node_data *pnd; 1488 1489 pnd = PERFUSE_NODE_DATA(opc); 1490 1491 if (!(pnd->pnd_flags & PND_OPEN)) 1492 return EBADF; 1493 1494 /* 1495 * Actual close is postponed at inactive time. 1496 */ 1497 return 0; 1498 } 1499 1500 int 1501 perfuse_node_access(struct puffs_usermount *pu, puffs_cookie_t opc, int mode, 1502 const struct puffs_cred *pcr) 1503 { 1504 perfuse_msg_t *pm; 1505 struct perfuse_state *ps; 1506 struct fuse_access_in *fai; 1507 int error; 1508 1509 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 1510 return ENOENT; 1511 1512 node_ref(opc); 1513 1514 /* 1515 * If we previously detected the filesystem does not 1516 * implement access(), short-circuit the call and skip 1517 * to libpuffs access() emulation. 1518 */ 1519 ps = puffs_getspecific(pu); 1520 if (ps->ps_flags & PS_NO_ACCESS) { 1521 const struct vattr *vap; 1522 1523 vap = puffs_pn_getvap((struct puffs_node *)opc); 1524 1525 error = puffs_access(IFTOVT(vap->va_mode), 1526 vap->va_mode & ACCESSPERMS, 1527 vap->va_uid, vap->va_gid, 1528 (mode_t)mode, pcr); 1529 goto out; 1530 } 1531 1532 /* 1533 * Plain access call 1534 */ 1535 pm = ps->ps_new_msg(pu, opc, FUSE_ACCESS, sizeof(*fai), pcr); 1536 fai = GET_INPAYLOAD(ps, pm, fuse_access_in); 1537 fai->mask = 0; 1538 fai->mask |= (mode & PUFFS_VREAD) ? R_OK : 0; 1539 fai->mask |= (mode & PUFFS_VWRITE) ? W_OK : 0; 1540 fai->mask |= (mode & PUFFS_VEXEC) ? X_OK : 0; 1541 1542 error = xchg_msg(pu, opc, pm, NO_PAYLOAD_REPLY_LEN, wait_reply); 1543 1544 ps->ps_destroy_msg(pm); 1545 1546 /* 1547 * If unimplemented, start over with emulation 1548 */ 1549 if (error == ENOSYS) { 1550 ps->ps_flags |= PS_NO_ACCESS; 1551 error = perfuse_node_access(pu, opc, mode, pcr); 1552 } 1553 1554 out: 1555 node_rele(opc); 1556 return error; 1557 } 1558 1559 int 1560 perfuse_node_getattr(struct puffs_usermount *pu, puffs_cookie_t opc, 1561 struct vattr *vap, const struct puffs_cred *pcr) 1562 { 1563 return perfuse_node_getattr_ttl(pu, opc, vap, pcr, NULL); 1564 } 1565 1566 int 1567 perfuse_node_getattr_ttl(struct puffs_usermount *pu, puffs_cookie_t opc, 1568 struct vattr *vap, const struct puffs_cred *pcr, 1569 struct timespec *va_ttl) 1570 { 1571 perfuse_msg_t *pm = NULL; 1572 struct perfuse_state *ps; 1573 struct perfuse_node_data *pnd = PERFUSE_NODE_DATA(opc); 1574 struct fuse_getattr_in *fgi; 1575 struct fuse_attr_out *fao; 1576 int error = 0; 1577 1578 if ((pnd->pnd_flags & PND_REMOVED) && !(pnd->pnd_flags & PND_OPEN)) 1579 return ENOENT; 1580 1581 node_ref(opc); 1582 1583 /* 1584 * Serialize size access, see comment in perfuse_node_setattr(). 1585 */ 1586 while (pnd->pnd_flags & PND_INRESIZE) 1587 requeue_request(pu, opc, PCQ_RESIZE); 1588 pnd->pnd_flags |= PND_INRESIZE; 1589 1590 ps = puffs_getspecific(pu); 1591 1592 /* 1593 * FUSE_GETATTR_FH must be set in fgi->flags 1594 * if we use for fgi->fh 1595 */ 1596 pm = ps->ps_new_msg(pu, opc, FUSE_GETATTR, sizeof(*fgi), pcr); 1597 fgi = GET_INPAYLOAD(ps, pm, fuse_getattr_in); 1598 fgi->getattr_flags = 0; 1599 fgi->dummy = 0; 1600 fgi->fh = FUSE_UNKNOWN_FH; 1601 1602 if (!PN_ISDIR(opc) && PERFUSE_NODE_DATA(opc)->pnd_flags & PND_OPEN) { 1603 fgi->fh = perfuse_get_fh(opc, FREAD); 1604 fgi->getattr_flags |= FUSE_GETATTR_FH; 1605 } 1606 1607 #ifdef PERFUSE_DEBUG 1608 if (perfuse_diagflags & PDF_RESIZE) 1609 DPRINTF(">> %s %p %" PRIu64 "\n", __func__, (void *)opc, 1610 vap->va_size); 1611 #endif 1612 1613 if ((error = xchg_msg(pu, opc, pm, sizeof(*fao), wait_reply)) != 0) 1614 goto out; 1615 1616 fao = GET_OUTPAYLOAD(ps, pm, fuse_attr_out); 1617 1618 #ifdef PERFUSE_DEBUG 1619 if (perfuse_diagflags & PDF_RESIZE) 1620 DPRINTF("<< %s %p %" PRIu64 " -> %" PRIu64 "\n", __func__, 1621 (void *)opc, vap->va_size, fao->attr.size); 1622 #endif 1623 1624 /* 1625 * We set birthtime, flags, filerev,vaflags to 0. 1626 * This seems the best bet, since the information is 1627 * not available from filesystem. 1628 */ 1629 fuse_attr_to_vap(ps, vap, &fao->attr); 1630 1631 if (va_ttl != NULL) { 1632 va_ttl->tv_sec = fao->attr_valid; 1633 va_ttl->tv_nsec = fao->attr_valid_nsec; 1634 } 1635 1636 ps->ps_destroy_msg(pm); 1637 error = 0; 1638 out: 1639 1640 pnd->pnd_flags &= ~PND_INRESIZE; 1641 (void)dequeue_requests(opc, PCQ_RESIZE, DEQUEUE_ALL); 1642 1643 node_rele(opc); 1644 return error; 1645 } 1646 1647 int 1648 perfuse_node_setattr(struct puffs_usermount *pu, puffs_cookie_t opc, 1649 const struct vattr *vap, const struct puffs_cred *pcr) 1650 { 1651 return perfuse_node_setattr_ttl(pu, opc, 1652 __UNCONST(vap), pcr, NULL, 0); 1653 } 1654 1655 int 1656 perfuse_node_setattr_ttl(struct puffs_usermount *pu, puffs_cookie_t opc, 1657 struct vattr *vap, const struct puffs_cred *pcr, 1658 struct timespec *va_ttl, int xflag) 1659 { 1660 perfuse_msg_t *pm; 1661 uint64_t fh; 1662 struct perfuse_state *ps; 1663 struct perfuse_node_data *pnd; 1664 struct fuse_setattr_in *fsi; 1665 struct fuse_attr_out *fao; 1666 struct vattr *old_va; 1667 enum perfuse_xchg_pb_reply reply; 1668 int error; 1669 #ifdef PERFUSE_DEBUG 1670 struct vattr *old_vap; 1671 int resize_debug = 0; 1672 #endif 1673 ps = puffs_getspecific(pu); 1674 pnd = PERFUSE_NODE_DATA(opc); 1675 1676 /* 1677 * The only operation we can do once the file is removed 1678 * is to resize it, and we can do it only if it is open. 1679 * Do not even send the operation to the filesystem: the 1680 * file is not there anymore. 1681 */ 1682 if (pnd->pnd_flags & PND_REMOVED) { 1683 if (!(pnd->pnd_flags & PND_OPEN)) 1684 return ENOENT; 1685 1686 return 0; 1687 } 1688 1689 old_va = puffs_pn_getvap((struct puffs_node *)opc); 1690 1691 /* 1692 * Check for permission to change size 1693 * It is always allowed if we already have a write file handle 1694 */ 1695 if ((vap->va_size != (u_quad_t)PUFFS_VNOVAL) && 1696 !(pnd->pnd_flags & PND_WFH) && 1697 (error = mode_access(opc, pcr, PUFFS_VWRITE)) != 0) 1698 return error; 1699 1700 /* 1701 * Check for permission to change dates 1702 */ 1703 if (((vap->va_atime.tv_sec != (time_t)PUFFS_VNOVAL) || 1704 (vap->va_mtime.tv_sec != (time_t)PUFFS_VNOVAL)) && 1705 (puffs_access_times(old_va->va_uid, old_va->va_gid, 1706 old_va->va_mode, 0, pcr) != 0)) 1707 return EPERM; 1708 1709 /* 1710 * Check for permission to change owner and group 1711 */ 1712 if (((vap->va_uid != (uid_t)PUFFS_VNOVAL) || 1713 (vap->va_gid != (gid_t)PUFFS_VNOVAL)) && 1714 (puffs_access_chown(old_va->va_uid, old_va->va_gid, 1715 vap->va_uid, vap->va_gid, pcr)) != 0) 1716 return EPERM; 1717 1718 /* 1719 * Check for sticky bit on non-directory by non root user 1720 */ 1721 if ((vap->va_mode != (mode_t)PUFFS_VNOVAL) && 1722 (vap->va_mode & S_ISTXT) && (old_va->va_type != VDIR) && 1723 !puffs_cred_isjuggernaut(pcr)) 1724 return EFTYPE; 1725 1726 /* 1727 * Check for permission to change permissions 1728 */ 1729 if ((vap->va_mode != (mode_t)PUFFS_VNOVAL) && 1730 (puffs_access_chmod(old_va->va_uid, old_va->va_gid, 1731 old_va->va_type, vap->va_mode, pcr)) != 0) 1732 return EPERM; 1733 1734 node_ref(opc); 1735 1736 if (!PN_ISDIR(opc) && pnd->pnd_flags & PND_WFH) 1737 fh = perfuse_get_fh(opc, FWRITE); 1738 else 1739 fh = FUSE_UNKNOWN_FH; 1740 1741 /* 1742 * fchmod() sets mode and fh, and it may carry 1743 * a resize as well. That may break if the 1744 * filesystem does chmod then resize, and fails 1745 * because it does not have permission anymore. 1746 * We work this around by splitting into two setattr. 1747 */ 1748 if ((vap->va_size != (u_quad_t)PUFFS_VNOVAL) && 1749 (vap->va_mode != (mode_t)PUFFS_VNOVAL) && 1750 (fh != FUSE_UNKNOWN_FH)) { 1751 struct vattr resize_va; 1752 1753 (void)memcpy(&resize_va, vap, sizeof(resize_va)); 1754 resize_va.va_mode = (mode_t)PUFFS_VNOVAL; 1755 if ((error = perfuse_node_setattr_ttl(pu, opc, &resize_va, 1756 pcr, va_ttl, xflag)) != 0) 1757 goto out2; 1758 1759 vap->va_size = (u_quad_t)PUFFS_VNOVAL; 1760 } 1761 1762 pm = ps->ps_new_msg(pu, opc, FUSE_SETATTR, sizeof(*fsi), pcr); 1763 fsi = GET_INPAYLOAD(ps, pm, fuse_setattr_in); 1764 fsi->valid = 0; 1765 1766 /* 1767 * Get a fh if the node is open for writing 1768 */ 1769 if (fh != FUSE_UNKNOWN_FH) { 1770 fsi->fh = fh; 1771 fsi->valid |= FUSE_FATTR_FH; 1772 } 1773 1774 1775 if (vap->va_size != (u_quad_t)PUFFS_VNOVAL) { 1776 fsi->size = vap->va_size; 1777 fsi->valid |= FUSE_FATTR_SIZE; 1778 1779 /* 1780 * Serialize anything that can touch file size 1781 * to avoid reordered GETATTR and SETATTR. 1782 * Out of order SETATTR can report stale size, 1783 * which will cause the kernel to truncate the file. 1784 * XXX Probably useless now we have a lock on GETATTR 1785 */ 1786 while (pnd->pnd_flags & PND_INRESIZE) 1787 requeue_request(pu, opc, PCQ_RESIZE); 1788 pnd->pnd_flags |= PND_INRESIZE; 1789 } 1790 1791 /* 1792 * When not sending a time field, still fill with 1793 * current value, as the filesystem may just reset 1794 * the field to Epoch even if fsi->valid bit is 1795 * not set (GlusterFS does that). 1796 */ 1797 if (vap->va_atime.tv_sec != (time_t)PUFFS_VNOVAL) { 1798 fsi->atime = vap->va_atime.tv_sec; 1799 fsi->atimensec = (uint32_t)vap->va_atime.tv_nsec; 1800 fsi->valid |= FUSE_FATTR_ATIME; 1801 } else { 1802 fsi->atime = old_va->va_atime.tv_sec; 1803 fsi->atimensec = (uint32_t)old_va->va_atime.tv_nsec; 1804 } 1805 1806 if (vap->va_mtime.tv_sec != (time_t)PUFFS_VNOVAL) { 1807 fsi->mtime = vap->va_mtime.tv_sec; 1808 fsi->mtimensec = (uint32_t)vap->va_mtime.tv_nsec; 1809 fsi->valid |= FUSE_FATTR_MTIME; 1810 } else { 1811 fsi->mtime = old_va->va_mtime.tv_sec; 1812 fsi->mtimensec = (uint32_t)old_va->va_mtime.tv_nsec; 1813 } 1814 1815 if (vap->va_mode != (mode_t)PUFFS_VNOVAL) { 1816 fsi->mode = vap->va_mode; 1817 fsi->valid |= FUSE_FATTR_MODE; 1818 } 1819 1820 if (vap->va_uid != (uid_t)PUFFS_VNOVAL) { 1821 fsi->uid = vap->va_uid; 1822 fsi->valid |= FUSE_FATTR_UID; 1823 } 1824 1825 if (vap->va_gid != (gid_t)PUFFS_VNOVAL) { 1826 fsi->gid = vap->va_gid; 1827 fsi->valid |= FUSE_FATTR_GID; 1828 } 1829 1830 if (pnd->pnd_lock_owner != 0) { 1831 fsi->lock_owner = pnd->pnd_lock_owner; 1832 fsi->valid |= FUSE_FATTR_LOCKOWNER; 1833 } 1834 1835 #ifndef PUFFS_KFLAG_NOFLUSH_META 1836 /* 1837 * ftruncate() sends only va_size, and metadata cache 1838 * flush adds va_atime and va_mtime. Some FUSE 1839 * filesystems will attempt to detect ftruncate by 1840 * checking for FATTR_SIZE being set without 1841 * FATTR_UID|FATTR_GID|FATTR_ATIME|FATTR_MTIME|FATTR_MODE 1842 * 1843 * Try to adapt and remove FATTR_ATIME|FATTR_MTIME 1844 * if we suspect a ftruncate(). 1845 */ 1846 if ((vap->va_size != (u_quad_t)PUFFS_VNOVAL) && 1847 ((vap->va_mode == (mode_t)PUFFS_VNOVAL) && 1848 (vap->va_uid == (uid_t)PUFFS_VNOVAL) && 1849 (vap->va_gid == (gid_t)PUFFS_VNOVAL))) { 1850 fsi->atime = 0; 1851 fsi->atimensec = 0; 1852 fsi->mtime = 0; 1853 fsi->mtimensec = 0; 1854 fsi->valid &= ~(FUSE_FATTR_ATIME|FUSE_FATTR_MTIME); 1855 } 1856 1857 /* 1858 * If only atime is changed, discard the operation: it 1859 * happens after read, and in that case the filesystem 1860 * already updated atime. NB: utimes() also change mtime. 1861 */ 1862 if (fsi->valid == FUSE_FATTR_ATIME) 1863 fsi->valid &= ~FUSE_FATTR_ATIME; 1864 #endif /* PUFFS_KFLAG_NOFLUSH_META */ 1865 1866 /* 1867 * If nothing remain, discard the operation. 1868 */ 1869 if (!(fsi->valid & (FUSE_FATTR_SIZE|FUSE_FATTR_ATIME|FUSE_FATTR_MTIME| 1870 FUSE_FATTR_MODE|FUSE_FATTR_UID|FUSE_FATTR_GID))) { 1871 error = 0; 1872 ps->ps_destroy_msg(pm); 1873 goto out; 1874 } 1875 1876 #ifdef PERFUSE_DEBUG 1877 old_vap = puffs_pn_getvap((struct puffs_node *)opc); 1878 1879 if ((perfuse_diagflags & PDF_RESIZE) && 1880 (old_vap->va_size != (u_quad_t)PUFFS_VNOVAL)) { 1881 resize_debug = 1; 1882 1883 DPRINTF(">> %s %p %" PRIu64 " -> %" PRIu64 "\n", __func__, 1884 (void *)opc, 1885 puffs_pn_getvap((struct puffs_node *)opc)->va_size, 1886 fsi->size); 1887 } 1888 #endif 1889 1890 /* 1891 * Do not honour FAF when changing size. How do 1892 * you want such a thing to work? 1893 */ 1894 reply = wait_reply; 1895 #ifdef PUFFS_SETATTR_FAF 1896 if ((xflag & PUFFS_SETATTR_FAF) && !(fsi->valid & FUSE_FATTR_SIZE)) 1897 reply = no_reply; 1898 #endif 1899 if ((error = xchg_msg(pu, opc, pm, sizeof(*fao), reply)) != 0) 1900 goto out; 1901 1902 if (reply == no_reply) 1903 goto out; 1904 1905 /* 1906 * Copy back the new values 1907 */ 1908 fao = GET_OUTPAYLOAD(ps, pm, fuse_attr_out); 1909 1910 #ifdef PERFUSE_DEBUG 1911 if (resize_debug) 1912 DPRINTF("<< %s %p %" PRIu64 " -> %" PRIu64 "\n", __func__, 1913 (void *)opc, old_vap->va_size, fao->attr.size); 1914 #endif 1915 1916 fuse_attr_to_vap(ps, old_va, &fao->attr); 1917 1918 if (va_ttl != NULL) { 1919 va_ttl->tv_sec = fao->attr_valid; 1920 va_ttl->tv_nsec = fao->attr_valid_nsec; 1921 (void)memcpy(vap, old_va, sizeof(*vap)); 1922 } 1923 1924 ps->ps_destroy_msg(pm); 1925 error = 0; 1926 1927 out: 1928 if (pnd->pnd_flags & PND_INRESIZE) { 1929 pnd->pnd_flags &= ~PND_INRESIZE; 1930 (void)dequeue_requests(opc, PCQ_RESIZE, DEQUEUE_ALL); 1931 } 1932 1933 out2: 1934 node_rele(opc); 1935 return error; 1936 } 1937 1938 int 1939 perfuse_node_poll(struct puffs_usermount *pu, puffs_cookie_t opc, int *events) 1940 { 1941 struct perfuse_state *ps; 1942 perfuse_msg_t *pm; 1943 struct fuse_poll_in *fpi; 1944 struct fuse_poll_out *fpo; 1945 int error; 1946 1947 node_ref(opc); 1948 ps = puffs_getspecific(pu); 1949 /* 1950 * kh is set if FUSE_POLL_SCHEDULE_NOTIFY is set. 1951 * 1952 * XXX ps_new_msg() is called with NULL creds, which will 1953 * be interpreted as FUSE superuser. We have no way to 1954 * know the requesting process' credential, but since poll 1955 * is supposed to operate on a file that has been open, 1956 * permission should have already been checked at open time. 1957 * That still may breaks on filesystems that provides odd 1958 * semantics. 1959 */ 1960 pm = ps->ps_new_msg(pu, opc, FUSE_POLL, sizeof(*fpi), NULL); 1961 fpi = GET_INPAYLOAD(ps, pm, fuse_poll_in); 1962 fpi->fh = PN_ISDIR(opc) ? FUSE_UNKNOWN_FH : perfuse_get_fh(opc, FREAD); 1963 fpi->kh = 0; 1964 fpi->flags = 0; 1965 1966 #ifdef PERFUSE_DEBUG 1967 if (perfuse_diagflags & PDF_FH) 1968 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", " 1969 "fh = 0x%"PRIx64"\n", __func__, (void *)opc, 1970 PERFUSE_NODE_DATA(opc)->pnd_nodeid, fpi->fh); 1971 #endif 1972 if ((error = xchg_msg(pu, opc, pm, sizeof(*fpo), wait_reply)) != 0) 1973 goto out; 1974 1975 fpo = GET_OUTPAYLOAD(ps, pm, fuse_poll_out); 1976 *events = fpo->revents; 1977 1978 ps->ps_destroy_msg(pm); 1979 error = 0; 1980 1981 out: 1982 node_rele(opc); 1983 return error; 1984 } 1985 1986 /* ARGSUSED2 */ 1987 int 1988 perfuse_node_fsync(struct puffs_usermount *pu, puffs_cookie_t opc, 1989 const struct puffs_cred *pcr, int flags, off_t offlo, off_t offhi) 1990 { 1991 int op; 1992 perfuse_msg_t *pm; 1993 struct perfuse_state *ps; 1994 struct perfuse_node_data *pnd; 1995 struct fuse_fsync_in *ffi; 1996 uint64_t fh; 1997 int error = 0; 1998 1999 pm = NULL; 2000 ps = puffs_getspecific(pu); 2001 pnd = PERFUSE_NODE_DATA(opc); 2002 2003 /* 2004 * No need to sync a removed node 2005 */ 2006 if (pnd->pnd_flags & PND_REMOVED) 2007 return 0; 2008 2009 /* 2010 * We do not sync closed files. They have been 2011 * sync at inactive time already. 2012 */ 2013 if (!(pnd->pnd_flags & PND_OPEN)) 2014 return 0; 2015 2016 node_ref(opc); 2017 2018 if (PN_ISDIR(opc)) 2019 op = FUSE_FSYNCDIR; 2020 else /* VREG but also other types such as VLNK */ 2021 op = FUSE_FSYNC; 2022 2023 /* 2024 * Do not sync if there are no change to sync 2025 * XXX remove that test on files if we implement mmap 2026 */ 2027 #ifdef PERFUSE_DEBUG 2028 if (perfuse_diagflags & PDF_SYNC) 2029 DPRINTF("%s: TEST opc = %p, file = \"%s\" is %sdirty\n", 2030 __func__, (void*)opc, perfuse_node_path(ps, opc), 2031 pnd->pnd_flags & PND_DIRTY ? "" : "not "); 2032 #endif 2033 if (!(pnd->pnd_flags & PND_DIRTY)) 2034 goto out; 2035 2036 /* 2037 * It seems NetBSD can call fsync without open first 2038 * glusterfs complain in such a situation: 2039 * "FSYNC() ERR => -1 (Invalid argument)" 2040 * The file will be closed at inactive time. 2041 * 2042 * We open the directory for reading in order to sync. 2043 * This sounds rather counterintuitive, but it works. 2044 */ 2045 if (!(pnd->pnd_flags & PND_WFH)) { 2046 if ((error = perfuse_node_open(pu, opc, FREAD, pcr)) != 0) 2047 goto out; 2048 } 2049 2050 if (op == FUSE_FSYNCDIR) 2051 fh = perfuse_get_fh(opc, FREAD); 2052 else 2053 fh = perfuse_get_fh(opc, FWRITE); 2054 2055 /* 2056 * If fsync_flags is set, meta data should not be flushed. 2057 */ 2058 pm = ps->ps_new_msg(pu, opc, op, sizeof(*ffi), pcr); 2059 ffi = GET_INPAYLOAD(ps, pm, fuse_fsync_in); 2060 ffi->fh = fh; 2061 ffi->fsync_flags = (flags & FFILESYNC) ? 0 : 1; 2062 2063 #ifdef PERFUSE_DEBUG 2064 if (perfuse_diagflags & PDF_FH) 2065 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", fh = 0x%"PRIx64"\n", 2066 __func__, (void *)opc, 2067 PERFUSE_NODE_DATA(opc)->pnd_nodeid, ffi->fh); 2068 #endif 2069 2070 if ((error = xchg_msg(pu, opc, pm, 2071 NO_PAYLOAD_REPLY_LEN, wait_reply)) != 0) 2072 goto out; 2073 2074 /* 2075 * No reply beyond fuse_out_header: nothing to do on success 2076 * just clear the dirty flag 2077 */ 2078 pnd->pnd_flags &= ~PND_DIRTY; 2079 2080 #ifdef PERFUSE_DEBUG 2081 if (perfuse_diagflags & PDF_SYNC) 2082 DPRINTF("%s: CLEAR opc = %p, file = \"%s\"\n", 2083 __func__, (void*)opc, perfuse_node_path(ps, opc)); 2084 #endif 2085 2086 ps->ps_destroy_msg(pm); 2087 error = 0; 2088 2089 out: 2090 /* 2091 * ENOSYS is not returned to kernel, 2092 */ 2093 if (error == ENOSYS) 2094 error = 0; 2095 2096 node_rele(opc); 2097 return error; 2098 } 2099 2100 int 2101 perfuse_node_remove(struct puffs_usermount *pu, puffs_cookie_t opc, 2102 puffs_cookie_t targ, const struct puffs_cn *pcn) 2103 { 2104 struct perfuse_state *ps; 2105 struct perfuse_node_data *pnd; 2106 perfuse_msg_t *pm; 2107 char *path; 2108 const char *name; 2109 size_t len; 2110 int error; 2111 2112 pnd = PERFUSE_NODE_DATA(opc); 2113 2114 if ((pnd->pnd_flags & PND_REMOVED) || 2115 (PERFUSE_NODE_DATA(targ)->pnd_flags & PND_REMOVED)) 2116 return ENOENT; 2117 2118 #ifdef PERFUSE_DEBUG 2119 if (targ == NULL) 2120 DERRX(EX_SOFTWARE, "%s: targ is NULL", __func__); 2121 2122 if (perfuse_diagflags & (PDF_FH|PDF_FILENAME)) 2123 DPRINTF("%s: opc = %p, remove opc = %p, file = \"%s\"\n", 2124 __func__, (void *)opc, (void *)targ, pcn->pcn_name); 2125 #endif 2126 node_ref(opc); 2127 node_ref(targ); 2128 2129 /* 2130 * Await for all operations on the deleted node to drain, 2131 * as the filesystem may be confused to have it deleted 2132 * during a getattr 2133 */ 2134 while (PERFUSE_NODE_DATA(targ)->pnd_inxchg) 2135 requeue_request(pu, targ, PCQ_AFTERXCHG); 2136 2137 ps = puffs_getspecific(pu); 2138 pnd = PERFUSE_NODE_DATA(opc); 2139 name = pcn->pcn_name; 2140 len = pcn->pcn_namelen + 1; 2141 2142 pm = ps->ps_new_msg(pu, opc, FUSE_UNLINK, len, pcn->pcn_cred); 2143 path = _GET_INPAYLOAD(ps, pm, char *); 2144 (void)strlcpy(path, name, len); 2145 2146 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 2147 goto out; 2148 2149 perfuse_cache_flush(targ); 2150 PERFUSE_NODE_DATA(targ)->pnd_flags |= PND_REMOVED; 2151 2152 if (!(PERFUSE_NODE_DATA(targ)->pnd_flags & PND_OPEN)) 2153 puffs_setback(puffs_cc_getcc(pu), PUFFS_SETBACK_NOREF_N2); 2154 2155 /* 2156 * The parent directory needs a sync 2157 */ 2158 PERFUSE_NODE_DATA(opc)->pnd_flags |= PND_DIRTY; 2159 2160 #ifdef PERFUSE_DEBUG 2161 if (perfuse_diagflags & PDF_FILENAME) 2162 DPRINTF("%s: remove nodeid = 0x%"PRIx64" file = \"%s\"\n", 2163 __func__, PERFUSE_NODE_DATA(targ)->pnd_nodeid, 2164 pcn->pcn_name); 2165 #endif 2166 ps->ps_destroy_msg(pm); 2167 error = 0; 2168 2169 out: 2170 node_rele(opc); 2171 node_rele(targ); 2172 return error; 2173 } 2174 2175 int 2176 perfuse_node_link(struct puffs_usermount *pu, puffs_cookie_t opc, 2177 puffs_cookie_t targ, const struct puffs_cn *pcn) 2178 { 2179 struct perfuse_state *ps; 2180 perfuse_msg_t *pm; 2181 const char *name; 2182 size_t len; 2183 struct puffs_node *pn; 2184 struct fuse_link_in *fli; 2185 int error; 2186 2187 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 2188 return ENOENT; 2189 2190 node_ref(opc); 2191 node_ref(targ); 2192 ps = puffs_getspecific(pu); 2193 pn = (struct puffs_node *)targ; 2194 name = pcn->pcn_name; 2195 len = sizeof(*fli) + pcn->pcn_namelen + 1; 2196 2197 pm = ps->ps_new_msg(pu, opc, FUSE_LINK, len, pcn->pcn_cred); 2198 fli = GET_INPAYLOAD(ps, pm, fuse_link_in); 2199 fli->oldnodeid = PERFUSE_NODE_DATA(pn)->pnd_nodeid; 2200 (void)strlcpy((char *)(void *)(fli + 1), name, len - sizeof(*fli)); 2201 2202 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 2203 goto out; 2204 2205 ps->ps_destroy_msg(pm); 2206 error = 0; 2207 2208 out: 2209 node_rele(opc); 2210 node_rele(targ); 2211 return error; 2212 } 2213 2214 int 2215 perfuse_node_rename(struct puffs_usermount *pu, puffs_cookie_t opc, 2216 puffs_cookie_t src, const struct puffs_cn *pcn_src, 2217 puffs_cookie_t targ_dir, puffs_cookie_t targ, 2218 const struct puffs_cn *pcn_targ) 2219 { 2220 struct perfuse_state *ps; 2221 struct perfuse_node_data *dstdir_pnd; 2222 perfuse_msg_t *pm; 2223 struct fuse_rename_in *fri; 2224 const char *newname; 2225 const char *oldname; 2226 char *np; 2227 int error; 2228 size_t len; 2229 size_t newname_len; 2230 size_t oldname_len; 2231 2232 if ((PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) || 2233 (PERFUSE_NODE_DATA(src)->pnd_flags & PND_REMOVED) || 2234 (PERFUSE_NODE_DATA(targ_dir)->pnd_flags & PND_REMOVED)) 2235 return ENOENT; 2236 2237 node_ref(opc); 2238 node_ref(src); 2239 2240 /* 2241 * Await for all operations on the deleted node to drain, 2242 * as the filesystem may be confused to have it deleted 2243 * during a getattr 2244 */ 2245 if ((struct puffs_node *)targ != NULL) { 2246 node_ref(targ); 2247 while (PERFUSE_NODE_DATA(targ)->pnd_inxchg) 2248 requeue_request(pu, targ, PCQ_AFTERXCHG); 2249 } else { 2250 while (PERFUSE_NODE_DATA(src)->pnd_inxchg) 2251 requeue_request(pu, src, PCQ_AFTERXCHG); 2252 } 2253 2254 ps = puffs_getspecific(pu); 2255 newname = pcn_targ->pcn_name; 2256 newname_len = pcn_targ->pcn_namelen + 1; 2257 oldname = pcn_src->pcn_name; 2258 oldname_len = pcn_src->pcn_namelen + 1; 2259 2260 len = sizeof(*fri) + oldname_len + newname_len; 2261 pm = ps->ps_new_msg(pu, opc, FUSE_RENAME, len, pcn_targ->pcn_cred); 2262 fri = GET_INPAYLOAD(ps, pm, fuse_rename_in); 2263 fri->newdir = PERFUSE_NODE_DATA(targ_dir)->pnd_nodeid; 2264 np = (char *)(void *)(fri + 1); 2265 (void)strlcpy(np, oldname, oldname_len); 2266 np += oldname_len; 2267 (void)strlcpy(np, newname, newname_len); 2268 2269 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 2270 goto out; 2271 2272 2273 /* 2274 * Record new parent nodeid 2275 */ 2276 dstdir_pnd = PERFUSE_NODE_DATA(targ_dir); 2277 PERFUSE_NODE_DATA(src)->pnd_parent_nodeid = dstdir_pnd->pnd_nodeid; 2278 2279 if (opc != targ_dir) 2280 dstdir_pnd->pnd_flags |= PND_DIRTY; 2281 2282 if (strcmp(newname, "..") != 0) 2283 (void)strlcpy(PERFUSE_NODE_DATA(src)->pnd_name, 2284 newname, MAXPATHLEN); 2285 else 2286 PERFUSE_NODE_DATA(src)->pnd_name[0] = 0; /* forget name */ 2287 2288 PERFUSE_NODE_DATA(opc)->pnd_flags |= PND_DIRTY; 2289 2290 if ((struct puffs_node *)targ != NULL) { 2291 perfuse_cache_flush(targ); 2292 PERFUSE_NODE_DATA(targ)->pnd_flags |= PND_REMOVED; 2293 } 2294 2295 #ifdef PERFUSE_DEBUG 2296 if (perfuse_diagflags & PDF_FILENAME) 2297 DPRINTF("%s: nodeid = 0x%"PRIx64" file = \"%s\" renamed \"%s\" " 2298 "nodeid = 0x%"PRIx64" -> nodeid = 0x%"PRIx64" \"%s\"\n", 2299 __func__, PERFUSE_NODE_DATA(src)->pnd_nodeid, 2300 pcn_src->pcn_name, pcn_targ->pcn_name, 2301 PERFUSE_NODE_DATA(opc)->pnd_nodeid, 2302 PERFUSE_NODE_DATA(targ_dir)->pnd_nodeid, 2303 perfuse_node_path(ps, targ_dir)); 2304 #endif 2305 2306 ps->ps_destroy_msg(pm); 2307 error = 0; 2308 2309 out: 2310 node_rele(opc); 2311 node_rele(src); 2312 if ((struct puffs_node *)targ != NULL) 2313 node_rele(targ); 2314 2315 return error; 2316 } 2317 2318 int 2319 perfuse_node_mkdir(struct puffs_usermount *pu, puffs_cookie_t opc, 2320 struct puffs_newinfo *pni, const struct puffs_cn *pcn, 2321 const struct vattr *vap) 2322 { 2323 struct perfuse_state *ps; 2324 perfuse_msg_t *pm; 2325 struct fuse_mkdir_in *fmi; 2326 const char *path; 2327 size_t len; 2328 int error; 2329 2330 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 2331 return ENOENT; 2332 2333 node_ref(opc); 2334 ps = puffs_getspecific(pu); 2335 path = pcn->pcn_name; 2336 len = sizeof(*fmi) + pcn->pcn_namelen + 1; 2337 2338 pm = ps->ps_new_msg(pu, opc, FUSE_MKDIR, len, pcn->pcn_cred); 2339 fmi = GET_INPAYLOAD(ps, pm, fuse_mkdir_in); 2340 fmi->mode = vap->va_mode; 2341 fmi->umask = 0; /* Seems unused by libfuse? */ 2342 (void)strlcpy((char *)(void *)(fmi + 1), path, len - sizeof(*fmi)); 2343 2344 error = node_mk_common(pu, opc, pni, pcn, pm); 2345 2346 node_rele(opc); 2347 return error; 2348 } 2349 2350 2351 int 2352 perfuse_node_rmdir(struct puffs_usermount *pu, puffs_cookie_t opc, 2353 puffs_cookie_t targ, const struct puffs_cn *pcn) 2354 { 2355 struct perfuse_state *ps; 2356 struct perfuse_node_data *pnd; 2357 perfuse_msg_t *pm; 2358 char *path; 2359 const char *name; 2360 size_t len; 2361 int error; 2362 2363 pnd = PERFUSE_NODE_DATA(opc); 2364 2365 if ((pnd->pnd_flags & PND_REMOVED) || 2366 (PERFUSE_NODE_DATA(targ)->pnd_flags & PND_REMOVED)) 2367 return ENOENT; 2368 2369 /* 2370 * Attempt to rmdir dir/.. should raise ENOTEMPTY 2371 */ 2372 if (PERFUSE_NODE_DATA(targ)->pnd_nodeid == pnd->pnd_parent_nodeid) 2373 return ENOTEMPTY; 2374 2375 node_ref(opc); 2376 node_ref(targ); 2377 2378 /* 2379 * Await for all operations on the deleted node to drain, 2380 * as the filesystem may be confused to have it deleted 2381 * during a getattr 2382 */ 2383 while (PERFUSE_NODE_DATA(targ)->pnd_inxchg) 2384 requeue_request(pu, targ, PCQ_AFTERXCHG); 2385 2386 ps = puffs_getspecific(pu); 2387 name = pcn->pcn_name; 2388 len = pcn->pcn_namelen + 1; 2389 2390 pm = ps->ps_new_msg(pu, opc, FUSE_RMDIR, len, pcn->pcn_cred); 2391 path = _GET_INPAYLOAD(ps, pm, char *); 2392 (void)strlcpy(path, name, len); 2393 2394 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 2395 goto out; 2396 2397 perfuse_cache_flush(targ); 2398 PERFUSE_NODE_DATA(targ)->pnd_flags |= PND_REMOVED; 2399 2400 if (!(PERFUSE_NODE_DATA(targ)->pnd_flags & PND_OPEN)) 2401 puffs_setback(puffs_cc_getcc(pu), PUFFS_SETBACK_NOREF_N2); 2402 2403 /* 2404 * The parent directory needs a sync 2405 */ 2406 PERFUSE_NODE_DATA(opc)->pnd_flags |= PND_DIRTY; 2407 2408 #ifdef PERFUSE_DEBUG 2409 if (perfuse_diagflags & PDF_FILENAME) 2410 DPRINTF("%s: remove nodeid = 0x%"PRIx64" file = \"%s\"\n", 2411 __func__, PERFUSE_NODE_DATA(targ)->pnd_nodeid, 2412 perfuse_node_path(ps, targ)); 2413 #endif 2414 ps->ps_destroy_msg(pm); 2415 error = 0; 2416 2417 out: 2418 node_rele(opc); 2419 node_rele(targ); 2420 return error; 2421 } 2422 2423 /* vap is unused */ 2424 /* ARGSUSED4 */ 2425 int 2426 perfuse_node_symlink(struct puffs_usermount *pu, puffs_cookie_t opc, 2427 struct puffs_newinfo *pni, const struct puffs_cn *pcn_src, 2428 const struct vattr *vap, const char *link_target) 2429 { 2430 struct perfuse_state *ps; 2431 perfuse_msg_t *pm; 2432 char *np; 2433 const char *path; 2434 size_t path_len; 2435 size_t linkname_len; 2436 size_t len; 2437 int error; 2438 2439 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 2440 return ENOENT; 2441 2442 node_ref(opc); 2443 ps = puffs_getspecific(pu); 2444 path = pcn_src->pcn_name; 2445 path_len = pcn_src->pcn_namelen + 1; 2446 linkname_len = strlen(link_target) + 1; 2447 len = path_len + linkname_len; 2448 2449 pm = ps->ps_new_msg(pu, opc, FUSE_SYMLINK, len, pcn_src->pcn_cred); 2450 np = _GET_INPAYLOAD(ps, pm, char *); 2451 (void)strlcpy(np, path, path_len); 2452 np += path_len; 2453 (void)strlcpy(np, link_target, linkname_len); 2454 2455 error = node_mk_common(pu, opc, pni, pcn_src, pm); 2456 2457 node_rele(opc); 2458 return error; 2459 } 2460 2461 /* ARGSUSED4 */ 2462 int 2463 perfuse_node_readdir(struct puffs_usermount *pu, puffs_cookie_t opc, 2464 struct dirent *dent, off_t *readoff, size_t *reslen, 2465 const struct puffs_cred *pcr, int *eofflag, off_t *cookies, 2466 size_t *ncookies) 2467 { 2468 perfuse_msg_t *pm; 2469 uint64_t fh; 2470 struct perfuse_state *ps; 2471 struct perfuse_node_data *pnd; 2472 struct fuse_read_in *fri; 2473 struct fuse_out_header *foh; 2474 struct fuse_dirent *fd; 2475 size_t foh_len; 2476 int error; 2477 size_t fd_maxlen; 2478 2479 error = 0; 2480 node_ref(opc); 2481 ps = puffs_getspecific(pu); 2482 2483 /* 2484 * readdir state is kept at node level, and several readdir 2485 * requests can be issued at the same time on the same node. 2486 * We need to queue requests so that only one is in readdir 2487 * code at the same time. 2488 */ 2489 pnd = PERFUSE_NODE_DATA(opc); 2490 while (pnd->pnd_flags & PND_INREADDIR) 2491 requeue_request(pu, opc, PCQ_READDIR); 2492 pnd->pnd_flags |= PND_INREADDIR; 2493 2494 #ifdef PERFUSE_DEBUG 2495 if (perfuse_diagflags & PDF_READDIR) 2496 DPRINTF("%s: READDIR opc = %p enter critical section\n", 2497 __func__, (void *)opc); 2498 #endif 2499 /* 2500 * Re-initialize pnd->pnd_fd_cookie on the first readdir for a node 2501 */ 2502 if (*readoff == 0) 2503 pnd->pnd_fd_cookie = 0; 2504 2505 /* 2506 * Do we already have the data buffered? 2507 */ 2508 if (pnd->pnd_dirent != NULL) 2509 goto out; 2510 pnd->pnd_dirent_len = 0; 2511 2512 /* 2513 * It seems NetBSD can call readdir without open first 2514 * libfuse will crash if it is done that way, hence open first. 2515 */ 2516 if (!(pnd->pnd_flags & PND_OPEN)) { 2517 if ((error = perfuse_node_open(pu, opc, FREAD, pcr)) != 0) 2518 goto out; 2519 } 2520 2521 fh = perfuse_get_fh(opc, FREAD); 2522 2523 #ifdef PERFUSE_DEBUG 2524 if (perfuse_diagflags & PDF_FH) 2525 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", " 2526 "rfh = 0x%"PRIx64"\n", __func__, (void *)opc, 2527 PERFUSE_NODE_DATA(opc)->pnd_nodeid, fh); 2528 #endif 2529 2530 pnd->pnd_all_fd = NULL; 2531 pnd->pnd_all_fd_len = 0; 2532 fd_maxlen = ps->ps_max_readahead - sizeof(*foh); 2533 2534 do { 2535 size_t fd_len; 2536 char *afdp; 2537 2538 pm = ps->ps_new_msg(pu, opc, FUSE_READDIR, sizeof(*fri), pcr); 2539 2540 /* 2541 * read_flags, lock_owner and flags are unused in libfuse 2542 */ 2543 fri = GET_INPAYLOAD(ps, pm, fuse_read_in); 2544 fri->fh = fh; 2545 fri->offset = pnd->pnd_fd_cookie; 2546 fri->size = (uint32_t)fd_maxlen; 2547 fri->read_flags = 0; 2548 fri->lock_owner = 0; 2549 fri->flags = 0; 2550 2551 if ((error = xchg_msg(pu, opc, pm, 2552 UNSPEC_REPLY_LEN, wait_reply)) != 0) 2553 goto out; 2554 2555 /* 2556 * There are many puffs_framebufs calls later, 2557 * therefore foh will not be valid for a long time. 2558 * Just get the length and forget it. 2559 */ 2560 foh = GET_OUTHDR(ps, pm); 2561 foh_len = foh->len; 2562 2563 /* 2564 * Empty read: we reached the end of the buffer. 2565 */ 2566 if (foh_len == sizeof(*foh)) { 2567 ps->ps_destroy_msg(pm); 2568 *eofflag = 1; 2569 break; 2570 } 2571 2572 /* 2573 * Check for corrupted message. 2574 */ 2575 if (foh_len < sizeof(*foh) + sizeof(*fd)) { 2576 ps->ps_destroy_msg(pm); 2577 DWARNX("readdir reply too short"); 2578 error = EIO; 2579 goto out; 2580 } 2581 2582 2583 fd = GET_OUTPAYLOAD(ps, pm, fuse_dirent); 2584 fd_len = foh_len - sizeof(*foh); 2585 2586 pnd->pnd_all_fd = realloc(pnd->pnd_all_fd, 2587 pnd->pnd_all_fd_len + fd_len); 2588 if (pnd->pnd_all_fd == NULL) 2589 DERR(EX_OSERR, "%s: malloc failed", __func__); 2590 2591 afdp = (char *)(void *)pnd->pnd_all_fd + pnd->pnd_all_fd_len; 2592 (void)memcpy(afdp, fd, fd_len); 2593 2594 pnd->pnd_all_fd_len += fd_len; 2595 2596 /* 2597 * The fd->off field is used as a cookie for 2598 * resuming the next readdir() where this one was left. 2599 */ 2600 pnd->pnd_fd_cookie = readdir_last_cookie(fd, fd_len); 2601 2602 ps->ps_destroy_msg(pm); 2603 } while (1 /* CONSTCOND */); 2604 2605 if (pnd->pnd_all_fd != NULL) { 2606 if (fuse_to_dirent(pu, opc, pnd->pnd_all_fd, 2607 pnd->pnd_all_fd_len) == -1) 2608 error = EIO; 2609 } 2610 2611 out: 2612 if (pnd->pnd_all_fd != NULL) { 2613 free(pnd->pnd_all_fd); 2614 pnd->pnd_all_fd = NULL; 2615 pnd->pnd_all_fd_len = 0; 2616 } 2617 2618 if (error == 0) 2619 readdir_buffered(opc, dent, readoff, reslen); 2620 2621 /* 2622 * Schedule queued readdir requests 2623 */ 2624 pnd->pnd_flags &= ~PND_INREADDIR; 2625 (void)dequeue_requests(opc, PCQ_READDIR, DEQUEUE_ALL); 2626 2627 #ifdef PERFUSE_DEBUG 2628 if (perfuse_diagflags & PDF_READDIR) 2629 DPRINTF("%s: READDIR opc = %p exit critical section\n", 2630 __func__, (void *)opc); 2631 #endif 2632 2633 node_rele(opc); 2634 return error; 2635 } 2636 2637 int 2638 perfuse_node_readlink(struct puffs_usermount *pu, puffs_cookie_t opc, 2639 const struct puffs_cred *pcr, char *linkname, size_t *linklen) 2640 { 2641 struct perfuse_state *ps; 2642 perfuse_msg_t *pm; 2643 int error; 2644 size_t len; 2645 struct fuse_out_header *foh; 2646 2647 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 2648 return ENOENT; 2649 2650 node_ref(opc); 2651 ps = puffs_getspecific(pu); 2652 2653 pm = ps->ps_new_msg(pu, opc, FUSE_READLINK, 0, pcr); 2654 2655 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 2656 goto out; 2657 2658 foh = GET_OUTHDR(ps, pm); 2659 len = foh->len - sizeof(*foh); 2660 if (len > *linklen) 2661 DERRX(EX_PROTOCOL, "path len = %zd too long", len); 2662 if (len == 0) 2663 DERRX(EX_PROTOCOL, "path len = %zd too short", len); 2664 2665 (void)memcpy(linkname, _GET_OUTPAYLOAD(ps, pm, char *), len); 2666 2667 /* 2668 * FUSE filesystems return a NUL terminated string, we 2669 * do not want the trailing \0 2670 */ 2671 while (len > 0 && linkname[len - 1] == '\0') 2672 len--; 2673 2674 *linklen = len; 2675 2676 ps->ps_destroy_msg(pm); 2677 error = 0; 2678 2679 out: 2680 node_rele(opc); 2681 return error; 2682 } 2683 2684 int 2685 perfuse_node_reclaim2(struct puffs_usermount *pu, 2686 puffs_cookie_t opc, int nlookup) 2687 { 2688 struct perfuse_state *ps; 2689 perfuse_msg_t *pm; 2690 struct perfuse_node_data *pnd; 2691 struct fuse_forget_in *ffi; 2692 2693 #ifdef PERFUSE_DEBUG 2694 if (perfuse_diagflags & PDF_RECLAIM) 2695 DPRINTF("%s called with opc = %p, nlookup = %d\n", 2696 __func__, (void *)opc, nlookup); 2697 #endif 2698 if (opc == 0 || nlookup == 0) { 2699 return 0; 2700 } 2701 2702 ps = puffs_getspecific(pu); 2703 pnd = PERFUSE_NODE_DATA(opc); 2704 2705 /* 2706 * Never forget the root. 2707 */ 2708 if (pnd->pnd_nodeid == FUSE_ROOT_ID) 2709 return 0; 2710 2711 #ifdef PERFUSE_DEBUG 2712 if (perfuse_diagflags & PDF_RECLAIM) 2713 DPRINTF("%s (nodeid %"PRId64") reclaimed, nlookup = %d/%d\n", 2714 perfuse_node_path(ps, opc), pnd->pnd_nodeid, 2715 nlookup, pnd->pnd_puffs_nlookup); 2716 #endif 2717 /* 2718 * The kernel tells us how many lookups it made, which allows 2719 * us to detect that we have an uncompleted lookup and that the 2720 * node should not disappear. 2721 */ 2722 pnd->pnd_puffs_nlookup -= nlookup; 2723 if (pnd->pnd_puffs_nlookup > 0) 2724 return 0; 2725 2726 node_ref(opc); 2727 pnd->pnd_flags |= PND_RECLAIMED; 2728 2729 #ifdef PERFUSE_DEBUG 2730 if (perfuse_diagflags & PDF_RECLAIM) 2731 DPRINTF("%s (nodeid %"PRId64") is %sreclaimed, nlookup = %d " 2732 "%s%s%s%s, pending ops:%s%s%s\n", 2733 perfuse_node_path(ps, opc), pnd->pnd_nodeid, 2734 pnd->pnd_flags & PND_RECLAIMED ? "" : "not ", 2735 pnd->pnd_puffs_nlookup, 2736 pnd->pnd_flags & PND_OPEN ? "open " : "not open", 2737 pnd->pnd_flags & PND_RFH ? "r" : "", 2738 pnd->pnd_flags & PND_WFH ? "w" : "", 2739 pnd->pnd_flags & PND_BUSY ? " busy" : "", 2740 pnd->pnd_flags & PND_INREADDIR ? " readdir" : "", 2741 pnd->pnd_flags & PND_INWRITE ? " write" : "", 2742 pnd->pnd_flags & PND_INOPEN ? " open" : ""); 2743 #endif 2744 /* 2745 * Make sure it is not looked up again 2746 */ 2747 if (!(pnd->pnd_flags & PND_REMOVED)) 2748 perfuse_cache_flush(opc); 2749 2750 /* 2751 * Purge any activity on the node, while checking 2752 * that it remains eligible for a reclaim. 2753 */ 2754 while (pnd->pnd_ref > 1) 2755 requeue_request(pu, opc, PCQ_REF); 2756 2757 #ifdef PERFUSE_DEBUG 2758 if ((pnd->pnd_flags & PND_OPEN) || 2759 !TAILQ_EMPTY(&pnd->pnd_pcq)) 2760 DERRX(EX_SOFTWARE, "%s: opc = %p \"%s\": still open", 2761 __func__, opc, pnd->pnd_name); 2762 2763 if ((pnd->pnd_flags & PND_BUSY) || 2764 !TAILQ_EMPTY(&pnd->pnd_pcq)) 2765 DERRX(EX_SOFTWARE, "%s: opc = %p: queued operations", 2766 __func__, opc); 2767 2768 if (pnd->pnd_inxchg != 0) 2769 DERRX(EX_SOFTWARE, "%s: opc = %p: ongoing operations", 2770 __func__, opc); 2771 #endif 2772 2773 /* 2774 * Send the FORGET message 2775 * 2776 * ps_new_msg() is called with NULL creds, which will 2777 * be interpreted as FUSE superuser. This is obviously 2778 * fine since we operate with kernel creds here. 2779 */ 2780 pm = ps->ps_new_msg(pu, opc, FUSE_FORGET, 2781 sizeof(*ffi), NULL); 2782 ffi = GET_INPAYLOAD(ps, pm, fuse_forget_in); 2783 ffi->nlookup = pnd->pnd_fuse_nlookup; 2784 2785 /* 2786 * No reply is expected, pm is freed in xchg_msg 2787 */ 2788 (void)xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, no_reply); 2789 2790 perfuse_destroy_pn(pu, opc); 2791 2792 return 0; 2793 } 2794 2795 int 2796 perfuse_node_reclaim(struct puffs_usermount *pu, puffs_cookie_t opc) 2797 { 2798 #ifdef PERFUSE_DEBUG 2799 if (perfuse_diagflags & PDF_RECLAIM) 2800 DPRINTF("perfuse_node_reclaim called\n"); 2801 #endif 2802 return perfuse_node_reclaim2(pu, opc, 1); 2803 } 2804 2805 int 2806 perfuse_node_inactive(struct puffs_usermount *pu, puffs_cookie_t opc) 2807 { 2808 struct perfuse_node_data *pnd; 2809 int error; 2810 2811 if (opc == 0) 2812 return 0; 2813 2814 pnd = PERFUSE_NODE_DATA(opc); 2815 if (!(pnd->pnd_flags & (PND_OPEN|PND_REMOVED))) 2816 return 0; 2817 2818 node_ref(opc); 2819 2820 /* 2821 * Make sure all operation are finished 2822 * There can be an ongoing write. Other 2823 * operation wait for all data before 2824 * the close/inactive. 2825 */ 2826 while (pnd->pnd_flags & PND_INWRITE) 2827 requeue_request(pu, opc, PCQ_AFTERWRITE); 2828 2829 /* 2830 * The inactive operation may be cancelled, 2831 * If no open is in progress, set PND_INOPEN 2832 * so that a new open will be queued. 2833 */ 2834 if (pnd->pnd_flags & PND_INOPEN) 2835 goto out; 2836 2837 pnd->pnd_flags |= PND_INOPEN; 2838 2839 /* 2840 * Sync data 2841 */ 2842 if (pnd->pnd_flags & PND_DIRTY) { 2843 if ((error = perfuse_node_fsync(pu, opc, NULL, 0, 0, 0)) != 0) 2844 DWARN("%s: perfuse_node_fsync failed error = %d", 2845 __func__, error); 2846 } 2847 2848 2849 /* 2850 * Close handles 2851 */ 2852 if (pnd->pnd_flags & PND_WFH) { 2853 if ((error = perfuse_node_close_common(pu, opc, FWRITE)) != 0) 2854 DWARN("%s: close write FH failed error = %d", 2855 __func__, error); 2856 } 2857 2858 if (pnd->pnd_flags & PND_RFH) { 2859 if ((error = perfuse_node_close_common(pu, opc, FREAD)) != 0) 2860 DWARN("%s: close read FH failed error = %d", 2861 __func__, error); 2862 } 2863 2864 /* 2865 * This will cause a reclaim to be sent 2866 */ 2867 if (pnd->pnd_flags & PND_REMOVED) 2868 puffs_setback(puffs_cc_getcc(pu), PUFFS_SETBACK_NOREF_N1); 2869 2870 /* 2871 * Schedule awaiting operations 2872 */ 2873 pnd->pnd_flags &= ~PND_INOPEN; 2874 (void)dequeue_requests(opc, PCQ_OPEN, DEQUEUE_ALL); 2875 2876 /* 2877 * errors are ignored, since the kernel ignores the return code. 2878 */ 2879 out: 2880 node_rele(opc); 2881 return 0; 2882 } 2883 2884 2885 /* ARGSUSED0 */ 2886 int 2887 perfuse_node_print(struct puffs_usermount *pu, puffs_cookie_t opc) 2888 { 2889 DERRX(EX_SOFTWARE, "%s: UNIMPLEMENTED (FATAL)", __func__); 2890 return 0; 2891 } 2892 2893 int 2894 perfuse_node_pathconf(struct puffs_usermount *pu, puffs_cookie_t opc, 2895 int name, register_t *retval) 2896 { 2897 perfuse_msg_t *pm; 2898 struct perfuse_state *ps; 2899 struct fuse_statfs_out *fso; 2900 int error = 0; 2901 2902 /* 2903 * Static values copied from UFS 2904 * in src/sys/ufs/ufs/ufs_vnops.c 2905 */ 2906 switch (name) { 2907 case _PC_LINK_MAX: 2908 *retval = LINK_MAX; 2909 break; 2910 case _PC_PATH_MAX: 2911 *retval = PATH_MAX; 2912 break; 2913 case _PC_PIPE_BUF: 2914 *retval = PIPE_BUF; 2915 break; 2916 case _PC_CHOWN_RESTRICTED: 2917 *retval = 1; 2918 break; 2919 case _PC_NO_TRUNC: 2920 *retval = 1; 2921 break; 2922 case _PC_SYNC_IO: 2923 *retval = 1; 2924 break; 2925 case _PC_FILESIZEBITS: 2926 *retval = 42; 2927 break; 2928 case _PC_SYMLINK_MAX: 2929 *retval = MAXPATHLEN; 2930 break; 2931 case _PC_2_SYMLINKS: 2932 *retval = 1; 2933 break; 2934 case _PC_NAME_MAX: 2935 ps = puffs_getspecific(pu); 2936 pm = ps->ps_new_msg(pu, opc, FUSE_STATFS, 0, NULL); 2937 2938 error = xchg_msg(pu, opc, pm, sizeof(*fso), wait_reply); 2939 if (error != 0) 2940 return error; 2941 2942 fso = GET_OUTPAYLOAD(ps, pm, fuse_statfs_out); 2943 *retval = fso->st.namelen; 2944 2945 ps->ps_destroy_msg(pm); 2946 2947 break; 2948 default: 2949 DWARN("Unimplemented pathconf for name = %d", name); 2950 error = ENOSYS; 2951 break; 2952 } 2953 2954 return error; 2955 } 2956 2957 int 2958 perfuse_node_advlock(struct puffs_usermount *pu, puffs_cookie_t opc, 2959 void *id, int op, struct flock *fl, int flags) 2960 { 2961 struct perfuse_state *ps; 2962 int fop; 2963 perfuse_msg_t *pm; 2964 uint64_t fh; 2965 struct fuse_lk_in *fli; 2966 struct fuse_out_header *foh; 2967 struct fuse_lk_out *flo; 2968 uint32_t owner; 2969 size_t len; 2970 int error; 2971 2972 node_ref(opc); 2973 2974 /* 2975 * Make sure we do have a filehandle, as the FUSE filesystem 2976 * expect one. E.g.: if we provide none, GlusterFS logs an error 2977 * "0-glusterfs-fuse: xl is NULL" 2978 * 2979 * We need the read file handle if the file is open read only, 2980 * in order to support shared locks on read-only files. 2981 * NB: The kernel always sends advlock for read-only 2982 * files at exit time when the process used lock, see 2983 * sys_exit -> exit1 -> fd_free -> fd_close -> VOP_ADVLOCK 2984 */ 2985 if ((fh = perfuse_get_fh(opc, FREAD)) == FUSE_UNKNOWN_FH) { 2986 error = EBADF; 2987 goto out; 2988 } 2989 2990 ps = puffs_getspecific(pu); 2991 2992 if (op == F_GETLK) 2993 fop = FUSE_GETLK; 2994 else 2995 fop = (flags & F_WAIT) ? FUSE_SETLKW : FUSE_SETLK; 2996 2997 /* 2998 * XXX ps_new_msg() is called with NULL creds, which will 2999 * be interpreted as FUSE superuser. We have no way to 3000 * know the requesting process' credential, but since advlock() 3001 * is supposed to operate on a file that has been open(), 3002 * permission should have already been checked at open() time. 3003 */ 3004 pm = ps->ps_new_msg(pu, opc, fop, sizeof(*fli), NULL); 3005 fli = GET_INPAYLOAD(ps, pm, fuse_lk_in); 3006 fli->fh = fh; 3007 fli->owner = (uint64_t)(vaddr_t)id; 3008 fli->lk.start = fl->l_start; 3009 fli->lk.end = fl->l_start + fl->l_len; 3010 fli->lk.type = fl->l_type; 3011 fli->lk.pid = fl->l_pid; 3012 fli->lk_flags = (flags & F_FLOCK) ? FUSE_LK_FLOCK : 0; 3013 3014 owner = (uint32_t)(vaddr_t)id; 3015 3016 #ifdef PERFUSE_DEBUG 3017 if (perfuse_diagflags & PDF_FH) 3018 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", fh = 0x%"PRIx64"\n", 3019 __func__, (void *)opc, 3020 PERFUSE_NODE_DATA(opc)->pnd_nodeid, fli->fh); 3021 #endif 3022 3023 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 3024 goto out; 3025 3026 foh = GET_OUTHDR(ps, pm); 3027 len = foh->len - sizeof(*foh); 3028 3029 /* 3030 * Save or clear the lock 3031 */ 3032 switch (op) { 3033 case F_GETLK: 3034 if (len != sizeof(*flo)) 3035 DERRX(EX_SOFTWARE, 3036 "%s: Unexpected lock reply len %zd", 3037 __func__, len); 3038 3039 flo = GET_OUTPAYLOAD(ps, pm, fuse_lk_out); 3040 fl->l_start = flo->lk.start; 3041 fl->l_len = flo->lk.end - flo->lk.start; 3042 fl->l_pid = flo->lk.pid; 3043 fl->l_type = flo->lk.type; 3044 fl->l_whence = SEEK_SET; /* libfuse hardcodes it */ 3045 3046 PERFUSE_NODE_DATA(opc)->pnd_lock_owner = flo->lk.pid; 3047 break; 3048 case F_UNLCK: 3049 owner = 0; 3050 /* FALLTHROUGH */ 3051 case F_SETLK: 3052 /* FALLTHROUGH */ 3053 case F_SETLKW: 3054 if (error != 0) 3055 PERFUSE_NODE_DATA(opc)->pnd_lock_owner = owner; 3056 3057 if (len != 0) 3058 DERRX(EX_SOFTWARE, 3059 "%s: Unexpected unlock reply len %zd", 3060 __func__, len); 3061 3062 break; 3063 default: 3064 DERRX(EX_SOFTWARE, "%s: Unexpected op %d", __func__, op); 3065 break; 3066 } 3067 3068 ps->ps_destroy_msg(pm); 3069 error = 0; 3070 3071 out: 3072 node_rele(opc); 3073 return error; 3074 } 3075 3076 int 3077 perfuse_node_read(struct puffs_usermount *pu, puffs_cookie_t opc, uint8_t *buf, 3078 off_t offset, size_t *resid, const struct puffs_cred *pcr, int ioflag) 3079 { 3080 struct perfuse_state *ps; 3081 struct perfuse_node_data *pnd; 3082 const struct vattr *vap; 3083 perfuse_msg_t *pm; 3084 uint64_t fh; 3085 struct fuse_read_in *fri; 3086 struct fuse_out_header *foh; 3087 size_t readen; 3088 int error; 3089 3090 ps = puffs_getspecific(pu); 3091 pnd = PERFUSE_NODE_DATA(opc); 3092 vap = puffs_pn_getvap((struct puffs_node *)opc); 3093 3094 /* 3095 * NetBSD turns that into a getdents(2) output 3096 * We just do a EISDIR as this feature is of little use. 3097 */ 3098 if (vap->va_type == VDIR) 3099 return EISDIR; 3100 3101 fh = perfuse_get_fh(opc, FREAD); /* Cannot be VDIR */ 3102 3103 do { 3104 size_t max_read; 3105 3106 max_read = ps->ps_max_readahead - sizeof(*foh); 3107 /* 3108 * flags may be set to FUSE_READ_LOCKOWNER 3109 * if lock_owner is provided. 3110 */ 3111 pm = ps->ps_new_msg(pu, opc, FUSE_READ, sizeof(*fri), pcr); 3112 fri = GET_INPAYLOAD(ps, pm, fuse_read_in); 3113 fri->fh = fh; 3114 fri->offset = offset; 3115 fri->size = (uint32_t)MIN(*resid, max_read); 3116 fri->read_flags = 0; /* XXX Unused by libfuse? */ 3117 fri->lock_owner = pnd->pnd_lock_owner; 3118 fri->flags = 0; 3119 fri->flags |= (fri->lock_owner != 0) ? FUSE_READ_LOCKOWNER : 0; 3120 3121 #ifdef PERFUSE_DEBUG 3122 if (perfuse_diagflags & PDF_FH) 3123 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", fh = 0x%"PRIx64"\n", 3124 __func__, (void *)opc, pnd->pnd_nodeid, fri->fh); 3125 #endif 3126 error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply); 3127 if (error != 0) 3128 return error; 3129 3130 foh = GET_OUTHDR(ps, pm); 3131 readen = foh->len - sizeof(*foh); 3132 3133 #ifdef PERFUSE_DEBUG 3134 if (readen > *resid) 3135 DERRX(EX_SOFTWARE, "%s: Unexpected big read %zd", 3136 __func__, readen); 3137 #endif 3138 3139 (void)memcpy(buf, _GET_OUTPAYLOAD(ps, pm, char *), readen); 3140 3141 buf += readen; 3142 offset += readen; 3143 *resid -= readen; 3144 3145 ps->ps_destroy_msg(pm); 3146 } while ((*resid != 0) && (readen != 0)); 3147 3148 if (ioflag & (IO_SYNC|IO_DSYNC)) 3149 ps->ps_syncreads++; 3150 else 3151 ps->ps_asyncreads++; 3152 3153 return 0; 3154 } 3155 3156 int 3157 perfuse_node_write(struct puffs_usermount *pu, puffs_cookie_t opc, 3158 uint8_t *buf, off_t offset, size_t *resid, 3159 const struct puffs_cred *pcr, int ioflag) 3160 { 3161 return perfuse_node_write2(pu, opc, buf, offset, resid, pcr, ioflag, 0); 3162 } 3163 3164 /* ARGSUSED7 */ 3165 int 3166 perfuse_node_write2(struct puffs_usermount *pu, puffs_cookie_t opc, 3167 uint8_t *buf, off_t offset, size_t *resid, 3168 const struct puffs_cred *pcr, int ioflag, int xflag) 3169 { 3170 struct perfuse_state *ps; 3171 struct perfuse_node_data *pnd; 3172 struct vattr *vap; 3173 perfuse_msg_t *pm; 3174 uint64_t fh; 3175 struct fuse_write_in *fwi; 3176 struct fuse_write_out *fwo; 3177 size_t data_len; 3178 size_t payload_len; 3179 size_t written; 3180 int inresize; 3181 int error; 3182 3183 ps = puffs_getspecific(pu); 3184 pnd = PERFUSE_NODE_DATA(opc); 3185 vap = puffs_pn_getvap((struct puffs_node *)opc); 3186 written = 0; 3187 inresize = 0; 3188 error = 0; 3189 3190 if (vap->va_type == VDIR) 3191 return EISDIR; 3192 3193 node_ref(opc); 3194 3195 /* 3196 * We need to queue write requests in order to avoid 3197 * dequeueing PCQ_AFTERWRITE when there are pending writes. 3198 */ 3199 while (pnd->pnd_flags & PND_INWRITE) 3200 requeue_request(pu, opc, PCQ_WRITE); 3201 pnd->pnd_flags |= PND_INWRITE; 3202 3203 /* 3204 * append flag: re-read the file size so that 3205 * we get the latest value. 3206 */ 3207 if (ioflag & PUFFS_IO_APPEND) { 3208 if ((error = perfuse_node_getattr(pu, opc, vap, pcr)) != 0) 3209 goto out; 3210 3211 offset = vap->va_size; 3212 } 3213 3214 /* 3215 * Serialize size access, see comment in perfuse_node_setattr(). 3216 */ 3217 if ((u_quad_t)offset + *resid > vap->va_size) { 3218 while (pnd->pnd_flags & PND_INRESIZE) 3219 requeue_request(pu, opc, PCQ_RESIZE); 3220 pnd->pnd_flags |= PND_INRESIZE; 3221 inresize = 1; 3222 } 3223 3224 #ifdef PERFUSE_DEBUG 3225 if (perfuse_diagflags & PDF_RESIZE) 3226 DPRINTF(">> %s %p %" PRIu64 "\n", __func__, 3227 (void *)opc, vap->va_size); 3228 #endif 3229 3230 fh = perfuse_get_fh(opc, FWRITE); /* Cannot be VDIR */ 3231 3232 do { 3233 size_t max_write; 3234 /* 3235 * There is a writepage flag when data 3236 * is aligned to page size. Use it for 3237 * everything but the data after the last 3238 * page boundary. 3239 */ 3240 max_write = ps->ps_max_write - sizeof(*fwi); 3241 3242 data_len = MIN(*resid, max_write); 3243 if (data_len > (size_t)sysconf(_SC_PAGESIZE)) 3244 data_len = data_len & ~(sysconf(_SC_PAGESIZE) - 1); 3245 3246 payload_len = data_len + sizeof(*fwi); 3247 3248 /* 3249 * flags may be set to FUSE_WRITE_CACHE (XXX usage?) 3250 * or FUSE_WRITE_LOCKOWNER, if lock_owner is provided. 3251 * write_flags is set to 1 for writepage. 3252 */ 3253 pm = ps->ps_new_msg(pu, opc, FUSE_WRITE, payload_len, pcr); 3254 fwi = GET_INPAYLOAD(ps, pm, fuse_write_in); 3255 fwi->fh = fh; 3256 fwi->offset = offset; 3257 fwi->size = (uint32_t)data_len; 3258 fwi->write_flags = (fwi->size % sysconf(_SC_PAGESIZE)) ? 0 : 1; 3259 fwi->lock_owner = pnd->pnd_lock_owner; 3260 fwi->flags = 0; 3261 fwi->flags |= (fwi->lock_owner != 0) ? FUSE_WRITE_LOCKOWNER : 0; 3262 fwi->flags |= (ioflag & IO_DIRECT) ? 0 : FUSE_WRITE_CACHE; 3263 (void)memcpy((fwi + 1), buf, data_len); 3264 3265 3266 #ifdef PERFUSE_DEBUG 3267 if (perfuse_diagflags & PDF_FH) 3268 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", " 3269 "fh = 0x%"PRIx64"\n", __func__, 3270 (void *)opc, pnd->pnd_nodeid, fwi->fh); 3271 #endif 3272 if ((error = xchg_msg(pu, opc, pm, 3273 sizeof(*fwo), wait_reply)) != 0) 3274 goto out; 3275 3276 fwo = GET_OUTPAYLOAD(ps, pm, fuse_write_out); 3277 written = fwo->size; 3278 ps->ps_destroy_msg(pm); 3279 3280 #ifdef PERFUSE_DEBUG 3281 if (written > *resid) 3282 DERRX(EX_SOFTWARE, "%s: Unexpected big write %zd", 3283 __func__, written); 3284 #endif 3285 *resid -= written; 3286 offset += written; 3287 buf += written; 3288 3289 } while (*resid != 0); 3290 3291 /* 3292 * puffs_ops(3) says 3293 * "everything must be written or an error will be generated" 3294 */ 3295 if (*resid != 0) 3296 error = EFBIG; 3297 3298 out: 3299 #ifdef PERFUSE_DEBUG 3300 if (perfuse_diagflags & PDF_RESIZE) { 3301 if (offset > (off_t)vap->va_size) 3302 DPRINTF("<< %s %p %" PRIu64 " -> %lld\n", __func__, 3303 (void *)opc, vap->va_size, (long long)offset); 3304 else 3305 DPRINTF("<< %s %p \n", __func__, (void *)opc); 3306 } 3307 #endif 3308 3309 /* 3310 * Update file size if we wrote beyond the end 3311 */ 3312 if (offset > (off_t)vap->va_size) 3313 vap->va_size = offset; 3314 3315 /* 3316 * Statistics 3317 */ 3318 if (ioflag & (IO_SYNC|IO_DSYNC)) 3319 ps->ps_syncwrites++; 3320 else 3321 ps->ps_asyncwrites++; 3322 3323 /* 3324 * Remember to sync the file 3325 */ 3326 pnd->pnd_flags |= PND_DIRTY; 3327 3328 #ifdef PERFUSE_DEBUG 3329 if (perfuse_diagflags & PDF_SYNC) 3330 DPRINTF("%s: DIRTY opc = %p, file = \"%s\"\n", 3331 __func__, (void*)opc, perfuse_node_path(ps, opc)); 3332 #endif 3333 3334 if (inresize) { 3335 #ifdef PERFUSE_DEBUG 3336 if (!(pnd->pnd_flags & PND_INRESIZE)) 3337 DERRX(EX_SOFTWARE, "file write grow without resize"); 3338 #endif 3339 pnd->pnd_flags &= ~PND_INRESIZE; 3340 (void)dequeue_requests(opc, PCQ_RESIZE, DEQUEUE_ALL); 3341 } 3342 3343 /* 3344 * VOP_PUTPAGE causes FAF write where kernel does not 3345 * check operation result. At least warn if it failed. 3346 */ 3347 #ifdef PUFFS_WRITE_FAF 3348 if (error && (xflag & PUFFS_WRITE_FAF)) 3349 DWARN("Data loss caused by FAF write failed on \"%s\"", 3350 pnd->pnd_name); 3351 #endif /* PUFFS_WRITE_FAF */ 3352 3353 /* 3354 * If there are no more queued write, we can resume 3355 * an operation awaiting write completion. 3356 */ 3357 pnd->pnd_flags &= ~PND_INWRITE; 3358 if (dequeue_requests(opc, PCQ_WRITE, 1) == 0) 3359 (void)dequeue_requests(opc, PCQ_AFTERWRITE, DEQUEUE_ALL); 3360 3361 node_rele(opc); 3362 return error; 3363 } 3364 3365 /* ARGSUSED0 */ 3366 void 3367 perfuse_cache_write(struct puffs_usermount *pu, puffs_cookie_t opc, size_t size, 3368 struct puffs_cacherun *runs) 3369 { 3370 return; 3371 } 3372 3373 /* ARGSUSED4 */ 3374 int 3375 perfuse_node_getextattr(struct puffs_usermount *pu, puffs_cookie_t opc, 3376 int attrns, const char *attrname, size_t *attrsize, uint8_t *attr, 3377 size_t *resid, const struct puffs_cred *pcr) 3378 { 3379 struct perfuse_state *ps; 3380 char fuse_attrname[LINUX_XATTR_NAME_MAX + 1]; 3381 perfuse_msg_t *pm; 3382 struct fuse_getxattr_in *fgi; 3383 struct fuse_getxattr_out *fgo; 3384 struct fuse_out_header *foh; 3385 size_t attrnamelen; 3386 size_t len; 3387 char *np; 3388 int error; 3389 3390 /* system namespace attrs are not accessible to non root users */ 3391 if (attrns == EXTATTR_NAMESPACE_SYSTEM && !puffs_cred_isjuggernaut(pcr)) 3392 return EPERM; 3393 3394 node_ref(opc); 3395 ps = puffs_getspecific(pu); 3396 attrname = perfuse_native_ns(attrns, attrname, fuse_attrname); 3397 attrnamelen = strlen(attrname) + 1; 3398 len = sizeof(*fgi) + attrnamelen; 3399 3400 pm = ps->ps_new_msg(pu, opc, FUSE_GETXATTR, len, pcr); 3401 fgi = GET_INPAYLOAD(ps, pm, fuse_getxattr_in); 3402 fgi->size = (unsigned int)((resid != NULL) ? *resid : 0); 3403 np = (char *)(void *)(fgi + 1); 3404 (void)strlcpy(np, attrname, attrnamelen); 3405 3406 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 3407 goto out; 3408 3409 /* 3410 * We just get fuse_getattr_out with list size if we requested 3411 * a null size. 3412 */ 3413 if (resid == NULL) { 3414 fgo = GET_OUTPAYLOAD(ps, pm, fuse_getxattr_out); 3415 3416 if (attrsize != NULL) 3417 *attrsize = fgo->size; 3418 3419 ps->ps_destroy_msg(pm); 3420 error = 0; 3421 goto out; 3422 } 3423 3424 /* 3425 * And with a non null requested size, we get the list just 3426 * after the header 3427 */ 3428 foh = GET_OUTHDR(ps, pm); 3429 np = (char *)(void *)(foh + 1); 3430 len = foh->len - sizeof(*foh); 3431 3432 if (attrsize != NULL) 3433 *attrsize = len; 3434 3435 if (resid != NULL) { 3436 if (*resid < len) { 3437 error = ERANGE; 3438 ps->ps_destroy_msg(pm); 3439 goto out; 3440 } 3441 3442 (void)memcpy(attr, np, len); 3443 *resid -= len; 3444 } 3445 3446 ps->ps_destroy_msg(pm); 3447 error = 0; 3448 3449 out: 3450 node_rele(opc); 3451 return error; 3452 } 3453 3454 int 3455 perfuse_node_setextattr(struct puffs_usermount *pu, puffs_cookie_t opc, 3456 int attrns, const char *attrname, uint8_t *attr, size_t *resid, 3457 const struct puffs_cred *pcr) 3458 { 3459 struct perfuse_state *ps; 3460 char fuse_attrname[LINUX_XATTR_NAME_MAX + 1]; 3461 perfuse_msg_t *pm; 3462 struct fuse_setxattr_in *fsi; 3463 size_t attrnamelen; 3464 size_t datalen; 3465 size_t len; 3466 char *np; 3467 int error; 3468 3469 /* system namespace attrs are not accessible to non root users */ 3470 if (attrns == EXTATTR_NAMESPACE_SYSTEM && !puffs_cred_isjuggernaut(pcr)) 3471 return EPERM; 3472 3473 node_ref(opc); 3474 ps = puffs_getspecific(pu); 3475 attrname = perfuse_native_ns(attrns, attrname, fuse_attrname); 3476 attrnamelen = strlen(attrname) + 1; 3477 3478 datalen = (resid != NULL) ? *resid : 0; 3479 len = sizeof(*fsi) + attrnamelen + datalen; 3480 3481 pm = ps->ps_new_msg(pu, opc, FUSE_SETXATTR, len, pcr); 3482 fsi = GET_INPAYLOAD(ps, pm, fuse_setxattr_in); 3483 fsi->size = (unsigned int)datalen; 3484 fsi->flags = 0; 3485 np = (char *)(void *)(fsi + 1); 3486 (void)strlcpy(np, attrname, attrnamelen); 3487 np += attrnamelen; 3488 if (datalen) 3489 (void)memcpy(np, (char *)attr, datalen); 3490 3491 if ((error = xchg_msg(pu, opc, pm, 3492 NO_PAYLOAD_REPLY_LEN, wait_reply)) != 0) 3493 goto out; 3494 3495 ps->ps_destroy_msg(pm); 3496 if (resid) 3497 *resid = 0; 3498 error = 0; 3499 3500 out: 3501 node_rele(opc); 3502 return error; 3503 } 3504 3505 /* ARGSUSED2 */ 3506 int 3507 perfuse_node_listextattr(struct puffs_usermount *pu, puffs_cookie_t opc, 3508 int attrns, size_t *attrsize, uint8_t *attrs, size_t *resid, int flag, 3509 const struct puffs_cred *pcr) 3510 { 3511 struct perfuse_state *ps; 3512 perfuse_msg_t *pm; 3513 struct fuse_getxattr_in *fgi; 3514 struct fuse_getxattr_out *fgo; 3515 struct fuse_out_header *foh; 3516 char *np; 3517 size_t len, puffs_len, i, attrlen, outlen; 3518 int error; 3519 3520 /* system namespace attrs are not accessible to non root users */ 3521 if (attrns == EXTATTR_NAMESPACE_SYSTEM && !puffs_cred_isjuggernaut(pcr)) 3522 return EPERM; 3523 3524 node_ref(opc); 3525 3526 ps = puffs_getspecific(pu); 3527 len = sizeof(*fgi); 3528 3529 pm = ps->ps_new_msg(pu, opc, FUSE_LISTXATTR, len, pcr); 3530 fgi = GET_INPAYLOAD(ps, pm, fuse_getxattr_in); 3531 if (resid != NULL) 3532 fgi->size = (unsigned int)*resid; 3533 else 3534 fgi->size = 0; 3535 3536 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 3537 goto out; 3538 3539 /* 3540 * We just get fuse_getattr_out with list size if we requested 3541 * a null size. 3542 */ 3543 if (resid == NULL) { 3544 fgo = GET_OUTPAYLOAD(ps, pm, fuse_getxattr_out); 3545 3546 if (attrsize != NULL) 3547 *attrsize = fgo->size; 3548 3549 ps->ps_destroy_msg(pm); 3550 3551 error = 0; 3552 goto out; 3553 } 3554 3555 /* 3556 * And with a non null requested size, we get the list just 3557 * after the header 3558 */ 3559 foh = GET_OUTHDR(ps, pm); 3560 np = (char *)(void *)(foh + 1); 3561 puffs_len = foh->len - sizeof(*foh); 3562 3563 if (attrsize != NULL) 3564 *attrsize = puffs_len; 3565 3566 if (attrs != NULL) { 3567 if (*resid < puffs_len) { 3568 error = ERANGE; 3569 ps->ps_destroy_msg(pm); 3570 goto out; 3571 } 3572 3573 outlen = 0; 3574 3575 for (i = 0; i < puffs_len; i += attrlen + 1) { 3576 attrlen = strlen(np + i); 3577 3578 /* 3579 * Filter attributes per namespace 3580 */ 3581 if (!perfuse_ns_match(attrns, np + i)) 3582 continue; 3583 3584 #ifdef PUFFS_EXTATTR_LIST_LENPREFIX 3585 /* 3586 * Convert the FUSE reply to length prefixed strings 3587 * if this is what the kernel wants. 3588 */ 3589 if (flag & PUFFS_EXTATTR_LIST_LENPREFIX) { 3590 (void)memcpy(attrs + outlen + 1, 3591 np + i, attrlen); 3592 *(attrs + outlen) = (uint8_t)attrlen; 3593 } else 3594 #endif /* PUFFS_EXTATTR_LIST_LENPREFIX */ 3595 (void)memcpy(attrs + outlen, np + i, attrlen + 1); 3596 outlen += attrlen + 1; 3597 } 3598 3599 *resid -= outlen; 3600 } 3601 3602 ps->ps_destroy_msg(pm); 3603 error = 0; 3604 3605 out: 3606 node_rele(opc); 3607 return error; 3608 } 3609 3610 int 3611 perfuse_node_deleteextattr(struct puffs_usermount *pu, puffs_cookie_t opc, 3612 int attrns, const char *attrname, const struct puffs_cred *pcr) 3613 { 3614 struct perfuse_state *ps; 3615 char fuse_attrname[LINUX_XATTR_NAME_MAX + 1]; 3616 perfuse_msg_t *pm; 3617 size_t attrnamelen; 3618 char *np; 3619 int error; 3620 3621 /* system namespace attrs are not accessible to non root users */ 3622 if (attrns == EXTATTR_NAMESPACE_SYSTEM && !puffs_cred_isjuggernaut(pcr)) 3623 return EPERM; 3624 3625 node_ref(opc); 3626 3627 ps = puffs_getspecific(pu); 3628 attrname = perfuse_native_ns(attrns, attrname, fuse_attrname); 3629 attrnamelen = strlen(attrname) + 1; 3630 3631 pm = ps->ps_new_msg(pu, opc, FUSE_REMOVEXATTR, attrnamelen, pcr); 3632 np = _GET_INPAYLOAD(ps, pm, char *); 3633 (void)strlcpy(np, attrname, attrnamelen); 3634 3635 error = xchg_msg(pu, opc, pm, NO_PAYLOAD_REPLY_LEN, wait_reply); 3636 if (error != 0) 3637 goto out; 3638 3639 ps->ps_destroy_msg(pm); 3640 3641 out: 3642 node_rele(opc); 3643 return error; 3644 } 3645 3646 int 3647 perfuse_node_fallocate(struct puffs_usermount *pu, puffs_cookie_t opc, 3648 off_t off, off_t len) 3649 { 3650 struct perfuse_state *ps; 3651 perfuse_msg_t *pm; 3652 struct fuse_fallocate_in *fai; 3653 int error; 3654 3655 ps = puffs_getspecific(pu); 3656 if (ps->ps_flags & PS_NO_FALLOCATE) 3657 return EOPNOTSUPP; 3658 3659 node_ref(opc); 3660 3661 pm = ps->ps_new_msg(pu, opc, FUSE_FALLOCATE, sizeof(*fai), NULL); 3662 3663 fai = GET_INPAYLOAD(ps, pm, fuse_fallocate_in); 3664 fai->fh = PN_ISDIR(opc) ? FUSE_UNKNOWN_FH : perfuse_get_fh(opc, FWRITE); 3665 fai->offset = off; 3666 fai->length = len; 3667 fai->mode = 0; 3668 3669 error = xchg_msg(pu, opc, pm, NO_PAYLOAD_REPLY_LEN, wait_reply); 3670 if (error == EOPNOTSUPP || error == ENOSYS) { 3671 ps->ps_flags |= PS_NO_FALLOCATE; 3672 error = EOPNOTSUPP; 3673 } 3674 if (error != 0) 3675 goto out; 3676 3677 ps->ps_destroy_msg(pm); 3678 3679 out: 3680 node_rele(opc); 3681 return error; 3682 } 3683
Indexes created Sun Sep 21 16:09:51 GMT 2025