1 /* $NetBSD: ops.c,v 1.62 2013/07/19 07:32:35 manu Exp $ */ 2 3 /*- 4 * Copyright (c) 2010-2011 Emmanuel Dreyfus. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 16 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 17 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 19 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 * POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <stdio.h> 29 #include <unistd.h> 30 #include <stdlib.h> 31 #include <libgen.h> 32 #include <errno.h> 33 #include <err.h> 34 #include <sysexits.h> 35 #include <syslog.h> 36 #include <puffs.h> 37 #include <sys/socket.h> 38 #include <sys/socket.h> 39 #include <sys/extattr.h> 40 #include <sys/time.h> 41 #include <machine/vmparam.h> 42 43 #include "perfuse_priv.h" 44 #include "fuse.h" 45 46 extern int perfuse_diagflags; 47 48 #if 0 49 static void print_node(const char *, puffs_cookie_t); 50 #endif 51 #ifdef PUFFS_KFLAG_CACHE_FS_TTL 52 static void perfuse_newinfo_setttl(struct puffs_newinfo *, 53 struct puffs_node *, struct fuse_entry_out *, struct fuse_attr_out *); 54 #endif /* PUFFS_KFLAG_CACHE_FS_TTL */ 55 static int xchg_msg(struct puffs_usermount *, puffs_cookie_t, 56 perfuse_msg_t *, size_t, enum perfuse_xchg_pb_reply); 57 static int mode_access(puffs_cookie_t, const struct puffs_cred *, mode_t); 58 static int sticky_access(puffs_cookie_t, struct puffs_node *, 59 const struct puffs_cred *); 60 static void fuse_attr_to_vap(struct perfuse_state *, 61 struct vattr *, struct fuse_attr *); 62 static int node_lookup_common(struct puffs_usermount *, puffs_cookie_t, 63 struct puffs_newinfo *, const char *, const struct puffs_cred *, 64 struct puffs_node **); 65 static int node_mk_common(struct puffs_usermount *, puffs_cookie_t, 66 struct puffs_newinfo *, const struct puffs_cn *pcn, perfuse_msg_t *); 67 static uint64_t readdir_last_cookie(struct fuse_dirent *, size_t); 68 static ssize_t fuse_to_dirent(struct puffs_usermount *, puffs_cookie_t, 69 struct fuse_dirent *, size_t); 70 static void readdir_buffered(puffs_cookie_t, struct dirent *, off_t *, 71 size_t *); 72 static void node_ref(puffs_cookie_t); 73 static void node_rele(puffs_cookie_t); 74 static void requeue_request(struct puffs_usermount *, 75 puffs_cookie_t opc, enum perfuse_qtype); 76 static int dequeue_requests(puffs_cookie_t opc, enum perfuse_qtype, int); 77 #define DEQUEUE_ALL 0 78 79 /* 80 * From <sys/vnode>, inside #ifdef _KERNEL section 81 */ 82 #define IO_SYNC (0x40|IO_DSYNC) 83 #define IO_DSYNC 0x00200 84 #define IO_DIRECT 0x02000 85 86 /* 87 * From <fcntl>, inside #ifdef _KERNEL section 88 */ 89 #define F_WAIT 0x010 90 #define F_FLOCK 0x020 91 #define OFLAGS(fflags) ((fflags) - 1) 92 93 /* 94 * Borrowed from src/sys/kern/vfs_subr.c and src/sys/sys/vnode.h 95 */ 96 const enum vtype iftovt_tab[16] = { 97 VNON, VFIFO, VCHR, VNON, VDIR, VNON, VBLK, VNON, 98 VREG, VNON, VLNK, VNON, VSOCK, VNON, VNON, VBAD, 99 }; 100 const int vttoif_tab[9] = { 101 0, S_IFREG, S_IFDIR, S_IFBLK, S_IFCHR, S_IFLNK, 102 S_IFSOCK, S_IFIFO, S_IFMT, 103 }; 104 105 #define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12]) 106 #define VTTOIF(indx) (vttoif_tab[(int)(indx)]) 107 108 #if 0 109 static void 110 print_node(const char *func, puffs_cookie_t opc) 111 { 112 struct puffs_node *pn; 113 struct perfuse_node_data *pnd; 114 struct vattr *vap; 115 116 pn = (struct puffs_node *)opc; 117 pnd = PERFUSE_NODE_DATA(opc); 118 vap = &pn->pn_va; 119 120 printf("%s: \"%s\", opc = %p, nodeid = 0x%"PRIx64" ino = %"PRIu64"\n", 121 func, pnd->pnd_name, opc, pnd->pnd_nodeid, vap->va_fileid); 122 123 return; 124 } 125 #endif /* PERFUSE_DEBUG */ 126 127 int 128 perfuse_node_close_common(struct puffs_usermount *pu, puffs_cookie_t opc, 129 int mode) 130 { 131 struct perfuse_state *ps; 132 perfuse_msg_t *pm; 133 int op; 134 uint64_t fh; 135 struct fuse_release_in *fri; 136 struct perfuse_node_data *pnd; 137 struct puffs_node *pn; 138 int error; 139 140 ps = puffs_getspecific(pu); 141 pn = (struct puffs_node *)opc; 142 pnd = PERFUSE_NODE_DATA(pn); 143 144 if (puffs_pn_getvap(pn)->va_type == VDIR) { 145 op = FUSE_RELEASEDIR; 146 mode = FREAD; 147 } else { 148 op = FUSE_RELEASE; 149 } 150 151 /* 152 * Destroy the filehandle before sending the 153 * request to the FUSE filesystem, otherwise 154 * we may get a second close() while we wait 155 * for the reply, and we would end up closing 156 * the same fh twice instead of closng both. 157 */ 158 fh = perfuse_get_fh(opc, mode); 159 perfuse_destroy_fh(pn, fh); 160 161 /* 162 * release_flags may be set to FUSE_RELEASE_FLUSH 163 * to flush locks. lock_owner must be set in that case 164 * 165 * ps_new_msg() is called with NULL creds, which will 166 * be interpreted as FUSE superuser. We come here from the 167 * inactive method, which provides no creds, but obviously 168 * runs with kernel privilege. 169 */ 170 pm = ps->ps_new_msg(pu, opc, op, sizeof(*fri), NULL); 171 fri = GET_INPAYLOAD(ps, pm, fuse_release_in); 172 fri->fh = fh; 173 fri->flags = 0; 174 fri->release_flags = 0; 175 fri->lock_owner = pnd->pnd_lock_owner; 176 fri->flags = (fri->lock_owner != 0) ? FUSE_RELEASE_FLUSH : 0; 177 178 #ifdef PERFUSE_DEBUG 179 if (perfuse_diagflags & PDF_FH) 180 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", fh = 0x%"PRIx64"\n", 181 __func__, (void *)opc, pnd->pnd_nodeid, fri->fh); 182 #endif 183 184 if ((error = xchg_msg(pu, opc, pm, 185 NO_PAYLOAD_REPLY_LEN, wait_reply)) != 0) 186 DERRX(EX_SOFTWARE, "%s: freed fh = 0x%"PRIx64" but filesystem " 187 "returned error = %d", __func__, fh, error); 188 189 ps->ps_destroy_msg(pm); 190 191 return 0; 192 } 193 194 static int 195 xchg_msg(struct puffs_usermount *pu, puffs_cookie_t opc, perfuse_msg_t *pm, 196 size_t len, enum perfuse_xchg_pb_reply wait) 197 { 198 struct perfuse_state *ps; 199 struct perfuse_node_data *pnd; 200 struct perfuse_trace *pt = NULL; 201 int error; 202 203 ps = puffs_getspecific(pu); 204 pnd = NULL; 205 if ((struct puffs_node *)opc != NULL) 206 pnd = PERFUSE_NODE_DATA(opc); 207 208 #ifdef PERFUSE_DEBUG 209 if ((perfuse_diagflags & PDF_FILENAME) && (opc != 0)) 210 DPRINTF("file = \"%s\", ino = %"PRIu64" flags = 0x%x\n", 211 perfuse_node_path(ps, opc), 212 ((struct puffs_node *)opc)->pn_va.va_fileid, 213 PERFUSE_NODE_DATA(opc)->pnd_flags); 214 #endif 215 ps->ps_xchgcount++; 216 if (pnd) 217 pnd->pnd_inxchg++; 218 219 /* 220 * Record FUSE call start if requested 221 */ 222 if (perfuse_diagflags & PDF_TRACE) 223 pt = perfuse_trace_begin(ps, opc, pm); 224 225 /* 226 * Do actual FUSE exchange 227 */ 228 if ((error = ps->ps_xchg_msg(pu, pm, len, wait)) != 0) 229 ps->ps_destroy_msg(pm); 230 231 /* 232 * Record FUSE call end if requested 233 */ 234 if (pt != NULL) 235 perfuse_trace_end(ps, pt, error); 236 237 ps->ps_xchgcount--; 238 if (pnd) { 239 pnd->pnd_inxchg--; 240 (void)dequeue_requests(opc, PCQ_AFTERXCHG, DEQUEUE_ALL); 241 } 242 243 return error; 244 } 245 246 static int 247 mode_access(puffs_cookie_t opc, const struct puffs_cred *pcr, mode_t mode) 248 { 249 struct puffs_node *pn; 250 struct vattr *va; 251 252 /* 253 * pcr is NULL for self open through fsync or readdir. 254 * In both case, access control is useless, as it was 255 * done before, at open time. 256 */ 257 if (pcr == NULL) 258 return 0; 259 260 pn = (struct puffs_node *)opc; 261 va = puffs_pn_getvap(pn); 262 return puffs_access(va->va_type, va->va_mode, 263 va->va_uid, va->va_gid, 264 mode, pcr); 265 } 266 267 static int 268 sticky_access(puffs_cookie_t opc, struct puffs_node *targ, 269 const struct puffs_cred *pcr) 270 { 271 uid_t uid; 272 int sticky, owner; 273 274 /* 275 * This covers the case where the kernel requests a DELETE 276 * or RENAME on its own, and where puffs_cred_getuid would 277 * return -1. While such a situation should not happen, 278 * we allow it here. 279 * 280 * This also allows root to tamper with other users' files 281 * that have the sticky bit. 282 */ 283 if (puffs_cred_isjuggernaut(pcr)) 284 return 0; 285 286 if (puffs_cred_getuid(pcr, &uid) != 0) 287 DERRX(EX_SOFTWARE, "puffs_cred_getuid fails in %s", __func__); 288 289 sticky = puffs_pn_getvap(opc)->va_mode & S_ISTXT; 290 owner = puffs_pn_getvap(targ)->va_uid == uid; 291 292 if (sticky && !owner) 293 return EACCES; 294 295 return 0; 296 } 297 298 299 static void 300 fuse_attr_to_vap(struct perfuse_state *ps, struct vattr *vap, 301 struct fuse_attr *fa) 302 { 303 vap->va_type = IFTOVT(fa->mode); 304 vap->va_mode = fa->mode & ALLPERMS; 305 vap->va_nlink = fa->nlink; 306 vap->va_uid = fa->uid; 307 vap->va_gid = fa->gid; 308 vap->va_fsid = (long)ps->ps_fsid; 309 vap->va_fileid = fa->ino; 310 vap->va_size = fa->size; 311 vap->va_blocksize = fa->blksize; 312 vap->va_atime.tv_sec = (time_t)fa->atime; 313 vap->va_atime.tv_nsec = (long) fa->atimensec; 314 vap->va_mtime.tv_sec = (time_t)fa->mtime; 315 vap->va_mtime.tv_nsec = (long)fa->mtimensec; 316 vap->va_ctime.tv_sec = (time_t)fa->ctime; 317 vap->va_ctime.tv_nsec = (long)fa->ctimensec; 318 vap->va_birthtime.tv_sec = 0; 319 vap->va_birthtime.tv_nsec = 0; 320 vap->va_gen = 0; 321 vap->va_flags = 0; 322 vap->va_rdev = fa->rdev; 323 vap->va_bytes = fa->size; 324 vap->va_filerev = (u_quad_t)PUFFS_VNOVAL; 325 vap->va_vaflags = 0; 326 327 if (vap->va_blocksize == 0) 328 vap->va_blocksize = DEV_BSIZE; 329 330 if (vap->va_size == (size_t)PUFFS_VNOVAL) /* XXX */ 331 vap->va_size = 0; 332 333 return; 334 } 335 336 #ifdef PUFFS_KFLAG_CACHE_FS_TTL 337 static void 338 perfuse_newinfo_setttl(struct puffs_newinfo *pni, 339 struct puffs_node *pn, struct fuse_entry_out *feo, 340 struct fuse_attr_out *fao) 341 { 342 #ifdef PERFUSE_DEBUG 343 if ((feo == NULL) && (fao == NULL)) 344 DERRX(EX_SOFTWARE, "%s: feo and fao NULL", __func__); 345 346 if ((feo != NULL) && (fao != NULL)) 347 DERRX(EX_SOFTWARE, "%s: feo and fao != NULL", __func__); 348 #endif /* PERFUSE_DEBUG */ 349 350 if (fao != NULL) { 351 struct timespec va_ttl; 352 353 va_ttl.tv_sec = fao->attr_valid; 354 va_ttl.tv_nsec = fao->attr_valid_nsec; 355 356 puffs_newinfo_setvattl(pni, &va_ttl); 357 } 358 359 if (feo != NULL) { 360 struct timespec va_ttl; 361 struct timespec cn_ttl; 362 struct timespec now; 363 struct perfuse_node_data *pnd = PERFUSE_NODE_DATA(pn); 364 365 va_ttl.tv_sec = feo->attr_valid; 366 va_ttl.tv_nsec = feo->attr_valid_nsec; 367 cn_ttl.tv_sec = feo->entry_valid; 368 cn_ttl.tv_nsec = feo->entry_valid_nsec; 369 370 puffs_newinfo_setvattl(pni, &va_ttl); 371 puffs_newinfo_setcnttl(pni, &cn_ttl); 372 373 if (clock_gettime(CLOCK_REALTIME, &now) != 0) 374 DERR(EX_OSERR, "clock_gettime failed"); 375 376 timespecadd(&now, &cn_ttl, &pnd->pnd_cn_expire); 377 } 378 379 return; 380 } 381 #endif /* PUFFS_KFLAG_CACHE_FS_TTL */ 382 383 static int 384 node_lookup_common(struct puffs_usermount *pu, puffs_cookie_t opc, 385 struct puffs_newinfo *pni, const char *path, 386 const struct puffs_cred *pcr, struct puffs_node **pnp) 387 { 388 struct perfuse_state *ps; 389 struct perfuse_node_data *oldpnd; 390 perfuse_msg_t *pm; 391 struct fuse_entry_out *feo; 392 struct puffs_node *pn; 393 size_t len; 394 int error; 395 396 /* 397 * Prevent further lookups if the parent was removed 398 */ 399 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 400 return ESTALE; 401 402 if (pnp == NULL) 403 DERRX(EX_SOFTWARE, "pnp must be != NULL"); 404 405 ps = puffs_getspecific(pu); 406 407 #ifdef PERFUSE_DEBUG 408 if (perfuse_diagflags & PDF_FILENAME) 409 DPRINTF("%s: opc = %p, file = \"%s\" looking up \"%s\"\n", 410 __func__, (void *)opc, 411 perfuse_node_path(ps, opc), path); 412 413 if (strcmp(path, ".") == 0) 414 DERRX(EX_SOFTWARE, "unexpected dot-lookup"); 415 416 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_RECLAIMED) 417 DERRX(EX_SOFTWARE, 418 "looking up reclaimed node opc = %p, name = \"%s\"", 419 opc, path); 420 421 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_INVALID) 422 DERRX(EX_SOFTWARE, 423 "looking up freed node opc = %p, name = \"%s\"", 424 opc, path); 425 #endif /* PERFUSE_DEBUG */ 426 427 len = strlen(path) + 1; 428 pm = ps->ps_new_msg(pu, opc, FUSE_LOOKUP, len, pcr); 429 (void)strlcpy(_GET_INPAYLOAD(ps, pm, char *), path, len); 430 431 if ((error = xchg_msg(pu, opc, pm, sizeof(*feo), wait_reply)) != 0) 432 return error; 433 434 feo = GET_OUTPAYLOAD(ps, pm, fuse_entry_out); 435 436 /* 437 * Starting with ABI 7.4, inode number 0 means ENOENT, 438 * with entry_valid / entry_valid_nsec giving negative 439 * cache timeout (which we do not implement yet). 440 */ 441 if (feo->attr.ino == 0) { 442 ps->ps_destroy_msg(pm); 443 return ENOENT; 444 } 445 446 /* 447 * Check for a known node, not reclaimed, with another name. 448 * It may have been moved, or we can lookup ../ 449 */ 450 if (((oldpnd = perfuse_node_bynodeid(ps, feo->nodeid)) != NULL) && 451 !(oldpnd->pnd_flags & PND_RECLAIMED)) { 452 /* 453 * Save the new node name if not .. 454 */ 455 if (strncmp(path, "..", len) != 0) 456 (void)strlcpy(oldpnd->pnd_name, 457 path, MAXPATHLEN); 458 pn = oldpnd->pnd_pn; 459 460 } else { 461 pn = perfuse_new_pn(pu, path, opc); 462 PERFUSE_NODE_DATA(pn)->pnd_nodeid = feo->nodeid; 463 perfuse_node_cache(ps, pn); 464 } 465 466 #ifdef PERFUSE_DEBUG 467 if (PERFUSE_NODE_DATA(pn)->pnd_flags & PND_RECLAIMED) 468 DERRX(EX_SOFTWARE, 469 "reclaimed in lookup opc = %p, name = \"%s\", ck = %p", 470 opc, path, pn); 471 472 if (PERFUSE_NODE_DATA(pn)->pnd_flags & PND_INVALID) 473 DERRX(EX_SOFTWARE, 474 "freed in lookup opc = %p, name = \"%s\", ck = %p", 475 opc, path, pn); 476 #endif /* PERFUSE_DEBUG */ 477 478 fuse_attr_to_vap(ps, &pn->pn_va, &feo->attr); 479 pn->pn_va.va_gen = (u_long)(feo->generation); 480 PERFUSE_NODE_DATA(pn)->pnd_fuse_nlookup++; 481 482 *pnp = pn; 483 484 #ifdef PERFUSE_DEBUG 485 if (perfuse_diagflags & PDF_FILENAME) 486 DPRINTF("%s: opc = %p, looked up opc = %p, " 487 "nodeid = 0x%"PRIx64" file = \"%s\"\n", __func__, 488 (void *)opc, pn, feo->nodeid, path); 489 #endif 490 491 if (pni != NULL) { 492 #ifdef PUFFS_KFLAG_CACHE_FS_TTL 493 puffs_newinfo_setva(pni, &pn->pn_va); 494 perfuse_newinfo_setttl(pni, pn, feo, NULL); 495 #endif /* PUFFS_KFLAG_CACHE_FS_TTL */ 496 puffs_newinfo_setcookie(pni, pn); 497 puffs_newinfo_setvtype(pni, pn->pn_va.va_type); 498 puffs_newinfo_setsize(pni, (voff_t)pn->pn_va.va_size); 499 puffs_newinfo_setrdev(pni, pn->pn_va.va_rdev); 500 } 501 502 if (PERFUSE_NODE_DATA(pn)->pnd_flags & PND_NODELEAK) { 503 PERFUSE_NODE_DATA(pn)->pnd_flags &= ~PND_NODELEAK; 504 ps->ps_nodeleakcount--; 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_puffs_nlookup++; 541 perfuse_node_cache(ps, pn); 542 543 fuse_attr_to_vap(ps, &pn->pn_va, &feo->attr); 544 pn->pn_va.va_gen = (u_long)(feo->generation); 545 546 puffs_newinfo_setcookie(pni, pn); 547 #ifdef PUFFS_KFLAG_CACHE_FS_TTL 548 puffs_newinfo_setva(pni, &pn->pn_va); 549 perfuse_newinfo_setttl(pni, pn, feo, NULL); 550 #endif /* PUFFS_KFLAG_CACHE_FS_TTL */ 551 552 553 #ifdef PERFUSE_DEBUG 554 if (perfuse_diagflags & PDF_FILENAME) 555 DPRINTF("%s: opc = %p, file = \"%s\", flags = 0x%x " 556 "nodeid = 0x%"PRIx64"\n", 557 __func__, (void *)pn, pcn->pcn_name, 558 PERFUSE_NODE_DATA(pn)->pnd_flags, feo->nodeid); 559 #endif 560 ps->ps_destroy_msg(pm); 561 562 /* Parents is now dirty */ 563 PERFUSE_NODE_DATA(opc)->pnd_flags |= PND_DIRTY; 564 565 return 0; 566 } 567 568 static uint64_t 569 readdir_last_cookie(struct fuse_dirent *fd, size_t fd_len) 570 { 571 size_t len; 572 size_t seen = 0; 573 char *ndp; 574 575 do { 576 len = FUSE_DIRENT_ALIGN(sizeof(*fd) + fd->namelen); 577 seen += len; 578 579 if (seen >= fd_len) 580 break; 581 582 ndp = (char *)(void *)fd + (size_t)len; 583 fd = (struct fuse_dirent *)(void *)ndp; 584 } while (1 /* CONSTCOND */); 585 586 return fd->off; 587 } 588 589 static ssize_t 590 fuse_to_dirent(struct puffs_usermount *pu, puffs_cookie_t opc, 591 struct fuse_dirent *fd, size_t fd_len) 592 { 593 struct dirent *dents; 594 size_t dents_len; 595 ssize_t written; 596 uint64_t fd_offset; 597 struct fuse_dirent *fd_base; 598 size_t len; 599 600 fd_base = fd; 601 fd_offset = 0; 602 written = 0; 603 dents = PERFUSE_NODE_DATA(opc)->pnd_dirent; 604 dents_len = (size_t)PERFUSE_NODE_DATA(opc)->pnd_dirent_len; 605 606 do { 607 char *ndp; 608 size_t reclen; 609 610 reclen = _DIRENT_RECLEN(dents, fd->namelen); 611 612 /* 613 * Check we do not overflow the output buffer 614 * struct fuse_dirent is bigger than struct dirent, 615 * so we should always use fd_len and never reallocate 616 * later. 617 * If we have to reallocate,try to double the buffer 618 * each time so that we do not have to do it too often. 619 */ 620 if (written + reclen > dents_len) { 621 if (dents_len == 0) 622 dents_len = fd_len; 623 else 624 dents_len = 625 MAX(2 * dents_len, written + reclen); 626 627 dents = PERFUSE_NODE_DATA(opc)->pnd_dirent; 628 if ((dents = realloc(dents, dents_len)) == NULL) 629 DERR(EX_OSERR, "%s: malloc failed", __func__); 630 631 PERFUSE_NODE_DATA(opc)->pnd_dirent = dents; 632 PERFUSE_NODE_DATA(opc)->pnd_dirent_len = dents_len; 633 634 /* 635 * (void *) for delint 636 */ 637 ndp = (char *)(void *)dents + written; 638 dents = (struct dirent *)(void *)ndp; 639 } 640 641 /* 642 * Filesystem was mounted without -o use_ino 643 * Perform a lookup to find it. 644 */ 645 if (fd->ino == PERFUSE_UNKNOWN_INO) { 646 struct puffs_node *pn; 647 648 if (node_lookup_common(pu, opc, NULL, fd->name, 649 NULL, &pn) != 0) { 650 DWARNX("node_lookup_common failed"); 651 } else { 652 fd->ino = pn->pn_va.va_fileid; 653 (void)perfuse_node_reclaim(pu, pn); 654 } 655 } 656 657 dents->d_fileno = fd->ino; 658 dents->d_reclen = (unsigned short)reclen; 659 dents->d_namlen = fd->namelen; 660 dents->d_type = fd->type; 661 strlcpy(dents->d_name, fd->name, fd->namelen + 1); 662 663 #ifdef PERFUSE_DEBUG 664 if (perfuse_diagflags & PDF_READDIR) 665 DPRINTF("%s: translated \"%s\" ino = %"PRIu64"\n", 666 __func__, dents->d_name, dents->d_fileno); 667 #endif 668 669 dents = _DIRENT_NEXT(dents); 670 written += reclen; 671 672 /* 673 * Move to the next record. 674 * fd->off is not the offset, it is an opaque cookie 675 * given by the filesystem to keep state across multiple 676 * readdir() operation. 677 * Use record alignement instead. 678 */ 679 len = FUSE_DIRENT_ALIGN(sizeof(*fd) + fd->namelen); 680 #ifdef PERFUSE_DEBUG 681 if (perfuse_diagflags & PDF_READDIR) 682 DPRINTF("%s: record at %"PRId64"/0x%"PRIx64" " 683 "length = %zd/0x%zx. " 684 "next record at %"PRId64"/0x%"PRIx64" " 685 "max %zd/0x%zx\n", 686 __func__, fd_offset, fd_offset, len, len, 687 fd_offset + len, fd_offset + len, 688 fd_len, fd_len); 689 #endif 690 fd_offset += len; 691 692 /* 693 * Check if next record is still within the packet 694 * If it is not, we reached the end of the buffer. 695 */ 696 if (fd_offset >= fd_len) 697 break; 698 699 /* 700 * (void *) for delint 701 */ 702 ndp = (char *)(void *)fd_base + (size_t)fd_offset; 703 fd = (struct fuse_dirent *)(void *)ndp; 704 705 } while (1 /* CONSTCOND */); 706 707 /* 708 * Adjust the dirent output length 709 */ 710 if (written != -1) 711 PERFUSE_NODE_DATA(opc)->pnd_dirent_len = written; 712 713 return written; 714 } 715 716 static void 717 readdir_buffered(puffs_cookie_t opc, struct dirent *dent, off_t *readoff, 718 size_t *reslen) 719 { 720 struct dirent *fromdent; 721 struct perfuse_node_data *pnd; 722 char *ndp; 723 724 pnd = PERFUSE_NODE_DATA(opc); 725 726 while (*readoff < pnd->pnd_dirent_len) { 727 /* 728 * (void *) for delint 729 */ 730 ndp = (char *)(void *)pnd->pnd_dirent + (size_t)*readoff; 731 fromdent = (struct dirent *)(void *)ndp; 732 733 if (*reslen < _DIRENT_SIZE(fromdent)) 734 break; 735 736 memcpy(dent, fromdent, _DIRENT_SIZE(fromdent)); 737 *readoff += _DIRENT_SIZE(fromdent); 738 *reslen -= _DIRENT_SIZE(fromdent); 739 740 dent = _DIRENT_NEXT(dent); 741 } 742 743 #ifdef PERFUSE_DEBUG 744 if (perfuse_diagflags & PDF_READDIR) 745 DPRINTF("%s: readoff = %"PRId64", " 746 "pnd->pnd_dirent_len = %"PRId64"\n", 747 __func__, *readoff, pnd->pnd_dirent_len); 748 #endif 749 if (*readoff >= pnd->pnd_dirent_len) { 750 free(pnd->pnd_dirent); 751 pnd->pnd_dirent = NULL; 752 pnd->pnd_dirent_len = 0; 753 } 754 755 return; 756 } 757 758 759 static void 760 node_ref(puffs_cookie_t opc) 761 { 762 struct perfuse_node_data *pnd = PERFUSE_NODE_DATA(opc); 763 764 #ifdef PERFUSE_DEBUG 765 if (pnd->pnd_flags & PND_INVALID) 766 DERRX(EX_SOFTWARE, "Use of freed node opc = %p", opc); 767 #endif /* PERFUSE_DEBUG */ 768 769 pnd->pnd_ref++; 770 return; 771 } 772 773 static void 774 node_rele(puffs_cookie_t opc) 775 { 776 struct perfuse_node_data *pnd = PERFUSE_NODE_DATA(opc); 777 778 #ifdef PERFUSE_DEBUG 779 if (pnd->pnd_flags & PND_INVALID) 780 DERRX(EX_SOFTWARE, "Use of freed node opc = %p", opc); 781 #endif /* PERFUSE_DEBUG */ 782 783 pnd->pnd_ref--; 784 785 if (pnd->pnd_ref == 0) 786 (void)dequeue_requests(opc, PCQ_REF, DEQUEUE_ALL); 787 788 return; 789 } 790 791 static void 792 requeue_request(struct puffs_usermount *pu, puffs_cookie_t opc, 793 enum perfuse_qtype type) 794 { 795 struct perfuse_cc_queue pcq; 796 struct perfuse_node_data *pnd; 797 #ifdef PERFUSE_DEBUG 798 struct perfuse_state *ps; 799 800 ps = perfuse_getspecific(pu); 801 #endif 802 803 pnd = PERFUSE_NODE_DATA(opc); 804 pcq.pcq_type = type; 805 pcq.pcq_cc = puffs_cc_getcc(pu); 806 TAILQ_INSERT_TAIL(&pnd->pnd_pcq, &pcq, pcq_next); 807 808 #ifdef PERFUSE_DEBUG 809 if (perfuse_diagflags & PDF_REQUEUE) 810 DPRINTF("%s: REQUEUE opc = %p, pcc = %p (%s)\n", 811 __func__, (void *)opc, pcq.pcq_cc, 812 perfuse_qtypestr[type]); 813 #endif 814 815 puffs_cc_yield(pcq.pcq_cc); 816 TAILQ_REMOVE(&pnd->pnd_pcq, &pcq, pcq_next); 817 818 #ifdef PERFUSE_DEBUG 819 if (perfuse_diagflags & PDF_REQUEUE) 820 DPRINTF("%s: RESUME opc = %p, pcc = %p (%s)\n", 821 __func__, (void *)opc, pcq.pcq_cc, 822 perfuse_qtypestr[type]); 823 #endif 824 825 return; 826 } 827 828 static int 829 dequeue_requests(puffs_cookie_t opc, enum perfuse_qtype type, int max) 830 { 831 struct perfuse_cc_queue *pcq; 832 struct perfuse_node_data *pnd; 833 int dequeued; 834 835 pnd = PERFUSE_NODE_DATA(opc); 836 dequeued = 0; 837 TAILQ_FOREACH(pcq, &pnd->pnd_pcq, pcq_next) { 838 if (pcq->pcq_type != type) 839 continue; 840 841 #ifdef PERFUSE_DEBUG 842 if (perfuse_diagflags & PDF_REQUEUE) 843 DPRINTF("%s: SCHEDULE opc = %p, pcc = %p (%s)\n", 844 __func__, (void *)opc, pcq->pcq_cc, 845 perfuse_qtypestr[type]); 846 #endif 847 puffs_cc_schedule(pcq->pcq_cc); 848 849 if (++dequeued == max) 850 break; 851 } 852 853 #ifdef PERFUSE_DEBUG 854 if (perfuse_diagflags & PDF_REQUEUE) 855 DPRINTF("%s: DONE opc = %p\n", __func__, (void *)opc); 856 #endif 857 858 return dequeued; 859 } 860 861 void 862 perfuse_fs_init(struct puffs_usermount *pu) 863 { 864 struct perfuse_state *ps; 865 perfuse_msg_t *pm; 866 struct fuse_init_in *fii; 867 struct fuse_init_out *fio; 868 int error; 869 870 ps = puffs_getspecific(pu); 871 872 if (puffs_mount(pu, ps->ps_target, ps->ps_mountflags, ps->ps_root) != 0) 873 DERR(EX_OSERR, "%s: puffs_mount failed", __func__); 874 875 /* 876 * Linux 2.6.34.1 sends theses flags: 877 * FUSE_ASYNC_READ | FUSE_POSIX_LOCKS | FUSE_ATOMIC_O_TRUNC 878 * FUSE_EXPORT_SUPPORT | FUSE_BIG_WRITES | FUSE_DONT_MASK 879 * 880 * Linux also sets max_readahead at 32 pages (128 kB) 881 * 882 * ps_new_msg() is called with NULL creds, which will 883 * be interpreted as FUSE superuser. 884 */ 885 pm = ps->ps_new_msg(pu, 0, FUSE_INIT, sizeof(*fii), NULL); 886 fii = GET_INPAYLOAD(ps, pm, fuse_init_in); 887 fii->major = FUSE_KERNEL_VERSION; 888 fii->minor = FUSE_KERNEL_MINOR_VERSION; 889 fii->max_readahead = (unsigned int)(32 * sysconf(_SC_PAGESIZE)); 890 fii->flags = (FUSE_ASYNC_READ|FUSE_POSIX_LOCKS|FUSE_ATOMIC_O_TRUNC); 891 892 if ((error = xchg_msg(pu, 0, pm, sizeof(*fio), wait_reply)) != 0) 893 DERRX(EX_SOFTWARE, "init message exchange failed (%d)", error); 894 895 fio = GET_OUTPAYLOAD(ps, pm, fuse_init_out); 896 ps->ps_max_readahead = fio->max_readahead; 897 ps->ps_max_write = fio->max_write; 898 899 ps->ps_destroy_msg(pm); 900 901 return; 902 } 903 904 int 905 perfuse_fs_unmount(struct puffs_usermount *pu, int flags) 906 { 907 perfuse_msg_t *pm; 908 struct perfuse_state *ps; 909 puffs_cookie_t opc; 910 int error; 911 912 ps = puffs_getspecific(pu); 913 opc = (puffs_cookie_t)puffs_getroot(pu); 914 915 /* 916 * ps_new_msg() is called with NULL creds, which will 917 * be interpreted as FUSE superuser. 918 */ 919 pm = ps->ps_new_msg(pu, opc, FUSE_DESTROY, 0, NULL); 920 921 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0){ 922 DWARN("unmount %s", ps->ps_target); 923 if (!(flags & MNT_FORCE)) 924 return error; 925 else 926 error = 0; 927 } else { 928 ps->ps_destroy_msg(pm); 929 } 930 931 ps->ps_umount(pu); 932 933 if (perfuse_diagflags & PDF_MISC) 934 DPRINTF("%s unmounted, exit\n", ps->ps_target); 935 936 return 0; 937 } 938 939 int 940 perfuse_fs_statvfs(struct puffs_usermount *pu, struct statvfs *svfsb) 941 { 942 struct perfuse_state *ps; 943 perfuse_msg_t *pm; 944 puffs_cookie_t opc; 945 struct fuse_statfs_out *fso; 946 int error; 947 948 ps = puffs_getspecific(pu); 949 opc = (puffs_cookie_t)puffs_getroot(pu); 950 951 /* 952 * ps_new_msg() is called with NULL creds, which will 953 * be interpreted as FUSE superuser. 954 */ 955 pm = ps->ps_new_msg(pu, opc, FUSE_STATFS, 0, NULL); 956 957 if ((error = xchg_msg(pu, opc, pm, sizeof(*fso), wait_reply)) != 0) 958 return error; 959 960 fso = GET_OUTPAYLOAD(ps, pm, fuse_statfs_out); 961 svfsb->f_flag = ps->ps_mountflags; 962 svfsb->f_bsize = fso->st.bsize; 963 svfsb->f_frsize = fso->st.frsize; 964 svfsb->f_iosize = ((struct puffs_node *)opc)->pn_va.va_blocksize; 965 svfsb->f_blocks = fso->st.blocks; 966 svfsb->f_bfree = fso->st.bfree; 967 svfsb->f_bavail = fso->st.bavail; 968 svfsb->f_bresvd = fso->st.bfree - fso->st.bavail; 969 svfsb->f_files = fso->st.files; 970 svfsb->f_ffree = fso->st.ffree; 971 svfsb->f_favail = fso->st.ffree;/* files not reserved for root */ 972 svfsb->f_fresvd = 0; /* files reserved for root */ 973 974 svfsb->f_syncreads = ps->ps_syncreads; 975 svfsb->f_syncwrites = ps->ps_syncwrites; 976 977 svfsb->f_asyncreads = ps->ps_asyncreads; 978 svfsb->f_asyncwrites = ps->ps_asyncwrites; 979 980 (void)memcpy(&svfsb->f_fsidx, &ps->ps_fsid, sizeof(ps->ps_fsid)); 981 svfsb->f_fsid = (unsigned long)ps->ps_fsid; 982 svfsb->f_namemax = MAXPATHLEN; /* XXX */ 983 svfsb->f_owner = ps->ps_owner_uid; 984 985 (void)strlcpy(svfsb->f_mntonname, ps->ps_target, _VFS_NAMELEN); 986 987 if (ps->ps_filesystemtype != NULL) 988 (void)strlcpy(svfsb->f_fstypename, 989 ps->ps_filesystemtype, _VFS_NAMELEN); 990 else 991 (void)strlcpy(svfsb->f_fstypename, "fuse", _VFS_NAMELEN); 992 993 if (ps->ps_source != NULL) 994 strlcpy(svfsb->f_mntfromname, ps->ps_source, _VFS_NAMELEN); 995 else 996 strlcpy(svfsb->f_mntfromname, _PATH_FUSE, _VFS_NAMELEN); 997 998 ps->ps_destroy_msg(pm); 999 1000 return 0; 1001 } 1002 1003 int 1004 perfuse_fs_sync(struct puffs_usermount *pu, int waitfor, 1005 const struct puffs_cred *pcr) 1006 { 1007 /* 1008 * FUSE does not seem to have a FS sync callback. 1009 * Maybe do not even register this callback 1010 */ 1011 return puffs_fsnop_sync(pu, waitfor, pcr); 1012 } 1013 1014 /* ARGSUSED0 */ 1015 int 1016 perfuse_fs_fhtonode(struct puffs_usermount *pu, void *fid, size_t fidsize, 1017 struct puffs_newinfo *pni) 1018 { 1019 DERRX(EX_SOFTWARE, "%s: UNIMPLEMENTED (FATAL)", __func__); 1020 return 0; 1021 } 1022 1023 /* ARGSUSED0 */ 1024 int 1025 perfuse_fs_nodetofh(struct puffs_usermount *pu, puffs_cookie_t cookie, 1026 void *fid, size_t *fidsize) 1027 { 1028 DERRX(EX_SOFTWARE, "%s: UNIMPLEMENTED (FATAL)", __func__); 1029 return 0; 1030 } 1031 1032 #if 0 1033 /* ARGSUSED0 */ 1034 void 1035 perfuse_fs_extattrctl(struct puffs_usermount *pu, int cmd, 1036 puffs_cookie_t *cookie, int flags, int namespace, const char *attrname) 1037 { 1038 DERRX(EX_SOFTWARE, "%s: UNIMPLEMENTED (FATAL)", __func__); 1039 return 0; 1040 } 1041 #endif /* 0 */ 1042 1043 /* ARGSUSED0 */ 1044 void 1045 perfuse_fs_suspend(struct puffs_usermount *pu, int status) 1046 { 1047 return; 1048 } 1049 1050 1051 int 1052 perfuse_node_lookup(struct puffs_usermount *pu, puffs_cookie_t opc, 1053 struct puffs_newinfo *pni, const struct puffs_cn *pcn) 1054 { 1055 struct perfuse_state *ps; 1056 struct puffs_node *pn; 1057 mode_t mode; 1058 int error; 1059 1060 ps = puffs_getspecific(pu); 1061 node_ref(opc); 1062 1063 /* 1064 * Check permissions 1065 */ 1066 switch(pcn->pcn_nameiop) { 1067 case NAMEI_DELETE: /* FALLTHROUGH */ 1068 case NAMEI_RENAME: /* FALLTHROUGH */ 1069 case NAMEI_CREATE: 1070 if (pcn->pcn_flags & NAMEI_ISLASTCN) 1071 mode = PUFFS_VEXEC|PUFFS_VWRITE; 1072 else 1073 mode = PUFFS_VEXEC; 1074 break; 1075 case NAMEI_LOOKUP: /* FALLTHROUGH */ 1076 default: 1077 mode = PUFFS_VEXEC; 1078 break; 1079 } 1080 1081 if ((error = mode_access(opc, pcn->pcn_cred, mode)) != 0) 1082 goto out; 1083 1084 error = node_lookup_common(pu, (puffs_cookie_t)opc, pni, 1085 pcn->pcn_name, pcn->pcn_cred, &pn); 1086 1087 if (error != 0) 1088 goto out; 1089 1090 /* 1091 * Kernel would kill us if the filesystem returned the parent 1092 * itself. If we want to live, hide that! 1093 */ 1094 if ((opc == (puffs_cookie_t)pn) && (strcmp(pcn->pcn_name, ".") != 0)) { 1095 DERRX(EX_SOFTWARE, "lookup \"%s\" in \"%s\" returned parent", 1096 pcn->pcn_name, perfuse_node_path(ps, opc)); 1097 /* NOTREACHED */ 1098 error = ESTALE; 1099 goto out; 1100 } 1101 1102 /* 1103 * Removed node 1104 */ 1105 if (PERFUSE_NODE_DATA(pn)->pnd_flags & PND_REMOVED) { 1106 error = ENOENT; 1107 goto out; 1108 } 1109 1110 /* 1111 * Check for sticky bit. Unfortunately there is no way to 1112 * do this before creating the puffs_node, since we require 1113 * this operation to get the node owner. 1114 */ 1115 switch (pcn->pcn_nameiop) { 1116 case NAMEI_DELETE: /* FALLTHROUGH */ 1117 case NAMEI_RENAME: 1118 error = sticky_access(opc, pn, pcn->pcn_cred); 1119 if (error != 0) { 1120 (void)perfuse_node_reclaim(pu, pn); 1121 goto out; 1122 } 1123 break; 1124 default: 1125 break; 1126 } 1127 1128 PERFUSE_NODE_DATA(pn)->pnd_puffs_nlookup++; 1129 1130 error = 0; 1131 1132 out: 1133 node_rele(opc); 1134 return error; 1135 } 1136 1137 int 1138 perfuse_node_create(struct puffs_usermount *pu, puffs_cookie_t opc, 1139 struct puffs_newinfo *pni, const struct puffs_cn *pcn, 1140 const struct vattr *vap) 1141 { 1142 perfuse_msg_t *pm; 1143 struct perfuse_state *ps; 1144 struct fuse_create_in *fci; 1145 struct fuse_entry_out *feo; 1146 struct fuse_open_out *foo; 1147 struct puffs_node *pn; 1148 const char *name; 1149 size_t namelen; 1150 size_t len; 1151 int error; 1152 1153 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 1154 return ENOENT; 1155 1156 node_ref(opc); 1157 1158 /* 1159 * If create is unimplemented: Check that it does not 1160 * already exists, and if not, do mknod and open 1161 */ 1162 ps = puffs_getspecific(pu); 1163 if (ps->ps_flags & PS_NO_CREAT) { 1164 error = node_lookup_common(pu, opc, NULL, pcn->pcn_name, 1165 pcn->pcn_cred, &pn); 1166 if (error == 0) { 1167 (void)perfuse_node_reclaim(pu, pn); 1168 error = EEXIST; 1169 goto out; 1170 } 1171 1172 error = perfuse_node_mknod(pu, opc, pni, pcn, vap); 1173 if (error != 0) 1174 goto out; 1175 1176 error = node_lookup_common(pu, opc, NULL, pcn->pcn_name, 1177 pcn->pcn_cred, &pn); 1178 if (error != 0) 1179 goto out; 1180 1181 /* 1182 * FUSE does the open at create time, while 1183 * NetBSD will open in a subsequent operation. 1184 * We need to open now, in order to retain FUSE 1185 * semantics. The calling process will not get 1186 * a file descriptor before the kernel sends 1187 * the open operation. 1188 */ 1189 error = perfuse_node_open(pu, (puffs_cookie_t)pn, 1190 FWRITE, pcn->pcn_cred); 1191 goto out; 1192 } 1193 1194 name = pcn->pcn_name; 1195 namelen = pcn->pcn_namelen + 1; 1196 len = sizeof(*fci) + namelen; 1197 1198 /* 1199 * flags should use O_WRONLY instead of O_RDWR, but it 1200 * breaks when the caller tries to read from file. 1201 * 1202 * mode must contain file type (ie: S_IFREG), use VTTOIF(vap->va_type) 1203 */ 1204 pm = ps->ps_new_msg(pu, opc, FUSE_CREATE, len, pcn->pcn_cred); 1205 fci = GET_INPAYLOAD(ps, pm, fuse_create_in); 1206 fci->flags = O_CREAT | O_TRUNC | O_RDWR; 1207 fci->mode = vap->va_mode | VTTOIF(vap->va_type); 1208 fci->umask = 0; /* Seems unused by libfuse */ 1209 (void)strlcpy((char*)(void *)(fci + 1), name, namelen); 1210 1211 len = sizeof(*feo) + sizeof(*foo); 1212 if ((error = xchg_msg(pu, opc, pm, len, wait_reply)) != 0) { 1213 /* 1214 * create is unimplmented, remember it for later, 1215 * and start over using mknod and open instead. 1216 */ 1217 if (error == ENOSYS) { 1218 ps->ps_flags |= PS_NO_CREAT; 1219 error = perfuse_node_create(pu, opc, pni, pcn, vap); 1220 } 1221 1222 goto out; 1223 } 1224 1225 feo = GET_OUTPAYLOAD(ps, pm, fuse_entry_out); 1226 foo = (struct fuse_open_out *)(void *)(feo + 1); 1227 if (feo->nodeid == PERFUSE_UNKNOWN_NODEID) 1228 DERRX(EX_SOFTWARE, "%s: no nodeid", __func__); 1229 1230 /* 1231 * Save the file handle and inode in node private data 1232 * so that we can reuse it later 1233 */ 1234 pn = perfuse_new_pn(pu, name, opc); 1235 perfuse_new_fh((puffs_cookie_t)pn, foo->fh, FWRITE); 1236 PERFUSE_NODE_DATA(pn)->pnd_nodeid = feo->nodeid; 1237 PERFUSE_NODE_DATA(pn)->pnd_puffs_nlookup++; 1238 perfuse_node_cache(ps, pn); 1239 1240 fuse_attr_to_vap(ps, &pn->pn_va, &feo->attr); 1241 pn->pn_va.va_gen = (u_long)(feo->generation); 1242 1243 puffs_newinfo_setcookie(pni, pn); 1244 #ifdef PUFFS_KFLAG_CACHE_FS_TTL 1245 puffs_newinfo_setva(pni, &pn->pn_va); 1246 perfuse_newinfo_setttl(pni, pn, feo, NULL); 1247 #endif /* PUFFS_KFLAG_CACHE_FS_TTL */ 1248 1249 #ifdef PERFUSE_DEBUG 1250 if (perfuse_diagflags & (PDF_FH|PDF_FILENAME)) 1251 DPRINTF("%s: opc = %p, file = \"%s\", flags = 0x%x " 1252 "nodeid = 0x%"PRIx64", wfh = 0x%"PRIx64"\n", 1253 __func__, (void *)pn, pcn->pcn_name, 1254 PERFUSE_NODE_DATA(pn)->pnd_flags, feo->nodeid, 1255 foo->fh); 1256 #endif 1257 1258 ps->ps_destroy_msg(pm); 1259 error = 0; 1260 1261 out: 1262 node_rele(opc); 1263 return error; 1264 } 1265 1266 1267 int 1268 perfuse_node_mknod(struct puffs_usermount *pu, puffs_cookie_t opc, 1269 struct puffs_newinfo *pni, const struct puffs_cn *pcn, 1270 const struct vattr *vap) 1271 { 1272 struct perfuse_state *ps; 1273 perfuse_msg_t *pm; 1274 struct fuse_mknod_in *fmi; 1275 const char* path; 1276 size_t len; 1277 int error; 1278 1279 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 1280 return ENOENT; 1281 1282 node_ref(opc); 1283 1284 /* 1285 * Only superuser can mknod objects other than 1286 * directories, files, socks, fifo and links. 1287 * 1288 * Create an object require -WX permission in the parent directory 1289 */ 1290 switch (vap->va_type) { 1291 case VDIR: /* FALLTHROUGH */ 1292 case VREG: /* FALLTHROUGH */ 1293 case VFIFO: /* FALLTHROUGH */ 1294 case VSOCK: 1295 break; 1296 default: /* VNON, VBLK, VCHR, VBAD */ 1297 if (!puffs_cred_isjuggernaut(pcn->pcn_cred)) { 1298 error = EACCES; 1299 goto out; 1300 } 1301 break; 1302 } 1303 1304 1305 ps = puffs_getspecific(pu); 1306 path = pcn->pcn_name; 1307 len = sizeof(*fmi) + pcn->pcn_namelen + 1; 1308 1309 /* 1310 * mode must contain file type (ie: S_IFREG), use VTTOIF(vap->va_type) 1311 */ 1312 pm = ps->ps_new_msg(pu, opc, FUSE_MKNOD, len, pcn->pcn_cred); 1313 fmi = GET_INPAYLOAD(ps, pm, fuse_mknod_in); 1314 fmi->mode = vap->va_mode | VTTOIF(vap->va_type); 1315 fmi->rdev = (uint32_t)vap->va_rdev; 1316 fmi->umask = 0; /* Seems unused bu libfuse */ 1317 (void)strlcpy((char *)(void *)(fmi + 1), path, len - sizeof(*fmi)); 1318 1319 error = node_mk_common(pu, opc, pni, pcn, pm); 1320 1321 out: 1322 node_rele(opc); 1323 return error; 1324 } 1325 1326 1327 int 1328 perfuse_node_open(struct puffs_usermount *pu, puffs_cookie_t opc, int mode, 1329 const struct puffs_cred *pcr) 1330 { 1331 struct perfuse_state *ps; 1332 struct perfuse_node_data *pnd; 1333 perfuse_msg_t *pm; 1334 mode_t fmode; 1335 int op; 1336 struct fuse_open_in *foi; 1337 struct fuse_open_out *foo; 1338 struct puffs_node *pn; 1339 int error; 1340 1341 ps = puffs_getspecific(pu); 1342 pn = (struct puffs_node *)opc; 1343 pnd = PERFUSE_NODE_DATA(opc); 1344 error = 0; 1345 1346 if (pnd->pnd_flags & PND_REMOVED) 1347 return ENOENT; 1348 1349 node_ref(opc); 1350 1351 if (puffs_pn_getvap(pn)->va_type == VDIR) 1352 op = FUSE_OPENDIR; 1353 else 1354 op = FUSE_OPEN; 1355 1356 /* 1357 * libfuse docs says 1358 * - O_CREAT and O_EXCL should never be set. 1359 * - O_TRUNC may be used if mount option atomic_o_trunc is used XXX 1360 * 1361 * O_APPEND makes no sense since FUSE always sends 1362 * the file offset for write operations. If the 1363 * filesystem uses pwrite(), O_APPEND would cause 1364 * the offset to be ignored and cause file corruption. 1365 */ 1366 mode &= ~(O_CREAT|O_EXCL|O_APPEND); 1367 1368 /* 1369 * Do not open twice, and do not reopen for reading 1370 * if we already have write handle. 1371 */ 1372 switch (mode & (FREAD|FWRITE)) { 1373 case FREAD: 1374 if (pnd->pnd_flags & (PND_RFH|PND_WFH)) 1375 goto out; 1376 break; 1377 case FWRITE: 1378 if (pnd->pnd_flags & PND_WFH) 1379 goto out; 1380 break; 1381 case FREAD|FWRITE: 1382 if (pnd->pnd_flags & PND_WFH) 1383 goto out; 1384 1385 /* 1386 * Corner case: if already open for reading (PND_RFH) 1387 * and re-opening FREAD|FWRITE, we need to reopen, 1388 * but only for writing. Note the change on mode 1389 * will only affect perfuse_new_fh() 1390 */ 1391 if (pnd->pnd_flags & PND_RFH) 1392 mode &= ~FREAD; 1393 break; 1394 default: 1395 DWARNX("open without either FREAD nor FWRITE"); 1396 error = EPERM; 1397 goto out; 1398 } 1399 1400 /* 1401 * Queue open on a node so that we do not open 1402 * twice. This would be better with read and 1403 * write distinguished. 1404 */ 1405 while (pnd->pnd_flags & PND_INOPEN) 1406 requeue_request(pu, opc, PCQ_OPEN); 1407 pnd->pnd_flags |= PND_INOPEN; 1408 1409 /* 1410 * Convert PUFFS mode to FUSE mode: convert FREAD/FWRITE 1411 * to O_RDONLY/O_WRONLY while perserving the other options. 1412 */ 1413 fmode = mode & ~(FREAD|FWRITE); 1414 fmode |= (mode & FWRITE) ? O_RDWR : O_RDONLY; 1415 1416 pm = ps->ps_new_msg(pu, opc, op, sizeof(*foi), pcr); 1417 foi = GET_INPAYLOAD(ps, pm, fuse_open_in); 1418 foi->flags = fmode; 1419 foi->unused = 0; 1420 1421 if ((error = xchg_msg(pu, opc, pm, sizeof(*foo), wait_reply)) != 0) 1422 goto out; 1423 1424 foo = GET_OUTPAYLOAD(ps, pm, fuse_open_out); 1425 1426 /* 1427 * Save the file handle in node private data 1428 * so that we can reuse it later 1429 */ 1430 perfuse_new_fh(opc, foo->fh, mode); 1431 1432 #ifdef PERFUSE_DEBUG 1433 if (perfuse_diagflags & (PDF_FH|PDF_FILENAME)) 1434 DPRINTF("%s: opc = %p, file = \"%s\", " 1435 "nodeid = 0x%"PRIx64", %s%sfh = 0x%"PRIx64"\n", 1436 __func__, (void *)opc, perfuse_node_path(ps, opc), 1437 pnd->pnd_nodeid, mode & FREAD ? "r" : "", 1438 mode & FWRITE ? "w" : "", foo->fh); 1439 #endif 1440 1441 ps->ps_destroy_msg(pm); 1442 out: 1443 1444 pnd->pnd_flags &= ~PND_INOPEN; 1445 (void)dequeue_requests(opc, PCQ_OPEN, DEQUEUE_ALL); 1446 1447 node_rele(opc); 1448 return error; 1449 } 1450 1451 /* ARGSUSED0 */ 1452 int 1453 perfuse_node_close(struct puffs_usermount *pu, puffs_cookie_t opc, int flags, 1454 const struct puffs_cred *pcr) 1455 { 1456 struct perfuse_node_data *pnd; 1457 1458 pnd = PERFUSE_NODE_DATA(opc); 1459 1460 if (!(pnd->pnd_flags & PND_OPEN)) 1461 return EBADF; 1462 1463 /* 1464 * Actual close is postponed at inactive time. 1465 */ 1466 return 0; 1467 } 1468 1469 int 1470 perfuse_node_access(struct puffs_usermount *pu, puffs_cookie_t opc, int mode, 1471 const struct puffs_cred *pcr) 1472 { 1473 perfuse_msg_t *pm; 1474 struct perfuse_state *ps; 1475 struct fuse_access_in *fai; 1476 int error; 1477 1478 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 1479 return ENOENT; 1480 1481 node_ref(opc); 1482 1483 /* 1484 * If we previously detected the filesystem does not 1485 * implement access(), short-circuit the call and skip 1486 * to libpuffs access() emulation. 1487 */ 1488 ps = puffs_getspecific(pu); 1489 if (ps->ps_flags & PS_NO_ACCESS) { 1490 const struct vattr *vap; 1491 1492 vap = puffs_pn_getvap((struct puffs_node *)opc); 1493 1494 error = puffs_access(IFTOVT(vap->va_mode), 1495 vap->va_mode & ACCESSPERMS, 1496 vap->va_uid, vap->va_gid, 1497 (mode_t)mode, pcr); 1498 goto out; 1499 } 1500 1501 /* 1502 * Plain access call 1503 */ 1504 pm = ps->ps_new_msg(pu, opc, FUSE_ACCESS, sizeof(*fai), pcr); 1505 fai = GET_INPAYLOAD(ps, pm, fuse_access_in); 1506 fai->mask = 0; 1507 fai->mask |= (mode & PUFFS_VREAD) ? R_OK : 0; 1508 fai->mask |= (mode & PUFFS_VWRITE) ? W_OK : 0; 1509 fai->mask |= (mode & PUFFS_VEXEC) ? X_OK : 0; 1510 1511 error = xchg_msg(pu, opc, pm, NO_PAYLOAD_REPLY_LEN, wait_reply); 1512 1513 ps->ps_destroy_msg(pm); 1514 1515 /* 1516 * If unimplemented, start over with emulation 1517 */ 1518 if (error == ENOSYS) { 1519 ps->ps_flags |= PS_NO_ACCESS; 1520 error = perfuse_node_access(pu, opc, mode, pcr); 1521 } 1522 1523 out: 1524 node_rele(opc); 1525 return error; 1526 } 1527 1528 int 1529 perfuse_node_getattr(struct puffs_usermount *pu, puffs_cookie_t opc, 1530 struct vattr *vap, const struct puffs_cred *pcr) 1531 { 1532 return perfuse_node_getattr_ttl(pu, opc, vap, pcr, NULL); 1533 } 1534 1535 int 1536 perfuse_node_getattr_ttl(struct puffs_usermount *pu, puffs_cookie_t opc, 1537 struct vattr *vap, const struct puffs_cred *pcr, 1538 struct timespec *va_ttl) 1539 { 1540 perfuse_msg_t *pm = NULL; 1541 struct perfuse_state *ps; 1542 struct perfuse_node_data *pnd = PERFUSE_NODE_DATA(opc); 1543 struct fuse_getattr_in *fgi; 1544 struct fuse_attr_out *fao; 1545 int error = 0; 1546 1547 if (pnd->pnd_flags & PND_REMOVED) 1548 return ENOENT; 1549 1550 node_ref(opc); 1551 1552 /* 1553 * Serialize size access, see comment in perfuse_node_setattr(). 1554 */ 1555 while (pnd->pnd_flags & PND_INRESIZE) 1556 requeue_request(pu, opc, PCQ_RESIZE); 1557 pnd->pnd_flags |= PND_INRESIZE; 1558 1559 ps = puffs_getspecific(pu); 1560 1561 /* 1562 * FUSE_GETATTR_FH must be set in fgi->flags 1563 * if we use for fgi->fh 1564 */ 1565 pm = ps->ps_new_msg(pu, opc, FUSE_GETATTR, sizeof(*fgi), pcr); 1566 fgi = GET_INPAYLOAD(ps, pm, fuse_getattr_in); 1567 fgi->getattr_flags = 0; 1568 fgi->dummy = 0; 1569 fgi->fh = 0; 1570 1571 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_OPEN) { 1572 fgi->fh = perfuse_get_fh(opc, FREAD); 1573 fgi->getattr_flags |= FUSE_GETATTR_FH; 1574 } 1575 1576 #ifdef PERFUSE_DEBUG 1577 if (perfuse_diagflags & PDF_RESIZE) 1578 DPRINTF(">> %s %p %" PRIu64 "\n", __func__, (void *)opc, 1579 vap->va_size); 1580 #endif 1581 1582 if ((error = xchg_msg(pu, opc, pm, sizeof(*fao), wait_reply)) != 0) 1583 goto out; 1584 1585 fao = GET_OUTPAYLOAD(ps, pm, fuse_attr_out); 1586 1587 #ifdef PERFUSE_DEBUG 1588 if (perfuse_diagflags & PDF_RESIZE) 1589 DPRINTF("<< %s %p %" PRIu64 " -> %" PRIu64 "\n", __func__, 1590 (void *)opc, vap->va_size, fao->attr.size); 1591 #endif 1592 1593 /* 1594 * We set birthtime, flags, filerev,vaflags to 0. 1595 * This seems the best bet, since the information is 1596 * not available from filesystem. 1597 */ 1598 fuse_attr_to_vap(ps, vap, &fao->attr); 1599 1600 if (va_ttl != NULL) { 1601 va_ttl->tv_sec = fao->attr_valid; 1602 va_ttl->tv_nsec = fao->attr_valid_nsec; 1603 } 1604 1605 ps->ps_destroy_msg(pm); 1606 error = 0; 1607 out: 1608 1609 pnd->pnd_flags &= ~PND_INRESIZE; 1610 (void)dequeue_requests(opc, PCQ_RESIZE, DEQUEUE_ALL); 1611 1612 node_rele(opc); 1613 return error; 1614 } 1615 1616 int 1617 perfuse_node_setattr(struct puffs_usermount *pu, puffs_cookie_t opc, 1618 const struct vattr *vap, const struct puffs_cred *pcr) 1619 { 1620 return perfuse_node_setattr_ttl(pu, opc, 1621 __UNCONST(vap), pcr, NULL, 0); 1622 } 1623 1624 int 1625 perfuse_node_setattr_ttl(struct puffs_usermount *pu, puffs_cookie_t opc, 1626 struct vattr *vap, const struct puffs_cred *pcr, 1627 struct timespec *va_ttl, int xflag) 1628 { 1629 perfuse_msg_t *pm; 1630 uint64_t fh; 1631 struct perfuse_state *ps; 1632 struct perfuse_node_data *pnd; 1633 struct fuse_setattr_in *fsi; 1634 struct fuse_attr_out *fao; 1635 struct vattr *old_va; 1636 enum perfuse_xchg_pb_reply reply; 1637 int error; 1638 #ifdef PERFUSE_DEBUG 1639 struct vattr *old_vap; 1640 int resize_debug = 0; 1641 #endif 1642 ps = puffs_getspecific(pu); 1643 pnd = PERFUSE_NODE_DATA(opc); 1644 1645 /* 1646 * The only operation we can do once the file is removed 1647 * is to resize it, and we can do it only if it is open. 1648 * Do not even send the operation to the filesystem: the 1649 * file is not there anymore. 1650 */ 1651 if (pnd->pnd_flags & PND_REMOVED) { 1652 if (!(pnd->pnd_flags & PND_OPEN)) 1653 return ENOENT; 1654 1655 return 0; 1656 } 1657 1658 old_va = puffs_pn_getvap((struct puffs_node *)opc); 1659 1660 /* 1661 * Check for permission to change size 1662 * It is always allowed if we already have a write file handle 1663 */ 1664 if ((vap->va_size != (u_quad_t)PUFFS_VNOVAL) && 1665 !(pnd->pnd_flags & PND_WFH) && 1666 (error = mode_access(opc, pcr, PUFFS_VWRITE)) != 0) 1667 return error; 1668 1669 /* 1670 * Check for permission to change dates 1671 */ 1672 if (((vap->va_atime.tv_sec != (time_t)PUFFS_VNOVAL) || 1673 (vap->va_mtime.tv_sec != (time_t)PUFFS_VNOVAL)) && 1674 (puffs_access_times(old_va->va_uid, old_va->va_gid, 1675 old_va->va_mode, 0, pcr) != 0)) 1676 return EACCES; 1677 1678 /* 1679 * Check for permission to change owner and group 1680 */ 1681 if (((vap->va_uid != (uid_t)PUFFS_VNOVAL) || 1682 (vap->va_gid != (gid_t)PUFFS_VNOVAL)) && 1683 (puffs_access_chown(old_va->va_uid, old_va->va_gid, 1684 vap->va_uid, vap->va_gid, pcr)) != 0) 1685 return EACCES; 1686 1687 /* 1688 * Check for permission to change permissions 1689 */ 1690 if ((vap->va_mode != (mode_t)PUFFS_VNOVAL) && 1691 (puffs_access_chmod(old_va->va_uid, old_va->va_gid, 1692 old_va->va_type, vap->va_mode, pcr)) != 0) 1693 return EACCES; 1694 1695 node_ref(opc); 1696 1697 if (pnd->pnd_flags & PND_WFH) 1698 fh = perfuse_get_fh(opc, FWRITE); 1699 else 1700 fh = FUSE_UNKNOWN_FH; 1701 1702 /* 1703 * fchmod() sets mode and fh, and it may carry 1704 * a resize as well. That may break if the 1705 * filesystem does chmod then resize, and fails 1706 * because it does not have permission anymore. 1707 * We work this around by splitting into two setattr. 1708 */ 1709 if ((vap->va_size != (u_quad_t)PUFFS_VNOVAL) && 1710 (vap->va_mode != (mode_t)PUFFS_VNOVAL) && 1711 (fh != FUSE_UNKNOWN_FH)) { 1712 struct vattr resize_va; 1713 1714 (void)memcpy(&resize_va, vap, sizeof(resize_va)); 1715 resize_va.va_mode = (mode_t)PUFFS_VNOVAL; 1716 if ((error = perfuse_node_setattr_ttl(pu, opc, &resize_va, 1717 pcr, va_ttl, xflag)) != 0) 1718 goto out2; 1719 1720 vap->va_size = (u_quad_t)PUFFS_VNOVAL; 1721 } 1722 1723 pm = ps->ps_new_msg(pu, opc, FUSE_SETATTR, sizeof(*fsi), pcr); 1724 fsi = GET_INPAYLOAD(ps, pm, fuse_setattr_in); 1725 fsi->valid = 0; 1726 1727 /* 1728 * Get a fh if the node is open for writing 1729 */ 1730 if (fh != FUSE_UNKNOWN_FH) { 1731 fsi->fh = fh; 1732 fsi->valid |= FUSE_FATTR_FH; 1733 } 1734 1735 1736 if (vap->va_size != (u_quad_t)PUFFS_VNOVAL) { 1737 fsi->size = vap->va_size; 1738 fsi->valid |= FUSE_FATTR_SIZE; 1739 1740 /* 1741 * Serialize anything that can touch file size 1742 * to avoid reordered GETATTR and SETATTR. 1743 * Out of order SETATTR can report stale size, 1744 * which will cause the kernel to truncate the file. 1745 * XXX Probably useless now we have a lock on GETATTR 1746 */ 1747 while (pnd->pnd_flags & PND_INRESIZE) 1748 requeue_request(pu, opc, PCQ_RESIZE); 1749 pnd->pnd_flags |= PND_INRESIZE; 1750 } 1751 1752 /* 1753 * Setting mtime without atime or vice versa leads to 1754 * dates being reset to Epoch on glusterfs. If one 1755 * is missing, use the old value. 1756 */ 1757 if ((vap->va_mtime.tv_sec != (time_t)PUFFS_VNOVAL) || 1758 (vap->va_atime.tv_sec != (time_t)PUFFS_VNOVAL)) { 1759 1760 if (vap->va_atime.tv_sec != (time_t)PUFFS_VNOVAL) { 1761 fsi->atime = vap->va_atime.tv_sec; 1762 fsi->atimensec = (uint32_t)vap->va_atime.tv_nsec; 1763 } else { 1764 fsi->atime = old_va->va_atime.tv_sec; 1765 fsi->atimensec = (uint32_t)old_va->va_atime.tv_nsec; 1766 } 1767 1768 if (vap->va_mtime.tv_sec != (time_t)PUFFS_VNOVAL) { 1769 fsi->mtime = vap->va_mtime.tv_sec; 1770 fsi->mtimensec = (uint32_t)vap->va_mtime.tv_nsec; 1771 } else { 1772 fsi->mtime = old_va->va_mtime.tv_sec; 1773 fsi->mtimensec = (uint32_t)old_va->va_mtime.tv_nsec; 1774 } 1775 1776 fsi->valid |= (FUSE_FATTR_MTIME|FUSE_FATTR_ATIME); 1777 } 1778 1779 if (vap->va_mode != (mode_t)PUFFS_VNOVAL) { 1780 fsi->mode = vap->va_mode; 1781 fsi->valid |= FUSE_FATTR_MODE; 1782 } 1783 1784 if (vap->va_uid != (uid_t)PUFFS_VNOVAL) { 1785 fsi->uid = vap->va_uid; 1786 fsi->valid |= FUSE_FATTR_UID; 1787 } 1788 1789 if (vap->va_gid != (gid_t)PUFFS_VNOVAL) { 1790 fsi->gid = vap->va_gid; 1791 fsi->valid |= FUSE_FATTR_GID; 1792 } 1793 1794 if (pnd->pnd_lock_owner != 0) { 1795 fsi->lock_owner = pnd->pnd_lock_owner; 1796 fsi->valid |= FUSE_FATTR_LOCKOWNER; 1797 } 1798 1799 /* 1800 * ftruncate() sends only va_size, and metadata cache 1801 * flush adds va_atime and va_mtime. Some FUSE 1802 * filesystems will attempt to detect ftruncate by 1803 * checking for FATTR_SIZE being set without 1804 * FATTR_UID|FATTR_GID|FATTR_ATIME|FATTR_MTIME|FATTR_MODE 1805 * 1806 * Try to adapt and remove FATTR_ATIME|FATTR_MTIME 1807 * if we suspect a ftruncate(). 1808 */ 1809 if ((vap->va_size != (u_quad_t)PUFFS_VNOVAL) && 1810 ((vap->va_mode == (mode_t)PUFFS_VNOVAL) && 1811 (vap->va_uid == (uid_t)PUFFS_VNOVAL) && 1812 (vap->va_gid == (gid_t)PUFFS_VNOVAL))) { 1813 fsi->atime = 0; 1814 fsi->atimensec = 0; 1815 fsi->mtime = 0; 1816 fsi->mtimensec = 0; 1817 fsi->valid &= ~(FUSE_FATTR_ATIME|FUSE_FATTR_MTIME); 1818 } 1819 1820 /* 1821 * If nothing remain, discard the operation. 1822 */ 1823 if (!(fsi->valid & (FUSE_FATTR_SIZE|FUSE_FATTR_ATIME|FUSE_FATTR_MTIME| 1824 FUSE_FATTR_MODE|FUSE_FATTR_UID|FUSE_FATTR_GID))) { 1825 error = 0; 1826 ps->ps_destroy_msg(pm); 1827 goto out; 1828 } 1829 1830 #ifdef PERFUSE_DEBUG 1831 old_vap = puffs_pn_getvap((struct puffs_node *)opc); 1832 1833 if ((perfuse_diagflags & PDF_RESIZE) && 1834 (old_vap->va_size != (u_quad_t)PUFFS_VNOVAL)) { 1835 resize_debug = 1; 1836 1837 DPRINTF(">> %s %p %" PRIu64 " -> %" PRIu64 "\n", __func__, 1838 (void *)opc, 1839 puffs_pn_getvap((struct puffs_node *)opc)->va_size, 1840 fsi->size); 1841 } 1842 #endif 1843 1844 /* 1845 * Do not honour FAF when changing size. How do 1846 * you want such a thing to work? 1847 */ 1848 reply = wait_reply; 1849 #ifdef PUFFS_SETATTR_FAF 1850 if ((xflag & PUFFS_SETATTR_FAF) && !(fsi->valid & FUSE_FATTR_SIZE)) 1851 reply = no_reply; 1852 #endif 1853 if ((error = xchg_msg(pu, opc, pm, sizeof(*fao), reply)) != 0) 1854 goto out; 1855 1856 if (reply == no_reply) 1857 goto out; 1858 1859 /* 1860 * Copy back the new values 1861 */ 1862 fao = GET_OUTPAYLOAD(ps, pm, fuse_attr_out); 1863 1864 #ifdef PERFUSE_DEBUG 1865 if (resize_debug) 1866 DPRINTF("<< %s %p %" PRIu64 " -> %" PRIu64 "\n", __func__, 1867 (void *)opc, old_vap->va_size, fao->attr.size); 1868 #endif 1869 1870 fuse_attr_to_vap(ps, old_va, &fao->attr); 1871 1872 if (va_ttl != NULL) { 1873 va_ttl->tv_sec = fao->attr_valid; 1874 va_ttl->tv_nsec = fao->attr_valid_nsec; 1875 (void)memcpy(vap, old_va, sizeof(*vap)); 1876 } 1877 1878 ps->ps_destroy_msg(pm); 1879 error = 0; 1880 1881 out: 1882 if (pnd->pnd_flags & PND_INRESIZE) { 1883 pnd->pnd_flags &= ~PND_INRESIZE; 1884 (void)dequeue_requests(opc, PCQ_RESIZE, DEQUEUE_ALL); 1885 } 1886 1887 out2: 1888 node_rele(opc); 1889 return error; 1890 } 1891 1892 int 1893 perfuse_node_poll(struct puffs_usermount *pu, puffs_cookie_t opc, int *events) 1894 { 1895 struct perfuse_state *ps; 1896 perfuse_msg_t *pm; 1897 struct fuse_poll_in *fpi; 1898 struct fuse_poll_out *fpo; 1899 int error; 1900 1901 node_ref(opc); 1902 ps = puffs_getspecific(pu); 1903 /* 1904 * kh is set if FUSE_POLL_SCHEDULE_NOTIFY is set. 1905 * 1906 * XXX ps_new_msg() is called with NULL creds, which will 1907 * be interpreted as FUSE superuser. We have no way to 1908 * know the requesting process' credential, but since poll 1909 * is supposed to operate on a file that has been open, 1910 * permission should have already been checked at open time. 1911 * That still may breaks on filesystems that provides odd 1912 * semantics. 1913 */ 1914 pm = ps->ps_new_msg(pu, opc, FUSE_POLL, sizeof(*fpi), NULL); 1915 fpi = GET_INPAYLOAD(ps, pm, fuse_poll_in); 1916 fpi->fh = perfuse_get_fh(opc, FREAD); 1917 fpi->kh = 0; 1918 fpi->flags = 0; 1919 1920 #ifdef PERFUSE_DEBUG 1921 if (perfuse_diagflags & PDF_FH) 1922 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", " 1923 "fh = 0x%"PRIx64"\n", __func__, (void *)opc, 1924 PERFUSE_NODE_DATA(opc)->pnd_nodeid, fpi->fh); 1925 #endif 1926 if ((error = xchg_msg(pu, opc, pm, sizeof(*fpo), wait_reply)) != 0) 1927 goto out; 1928 1929 fpo = GET_OUTPAYLOAD(ps, pm, fuse_poll_out); 1930 *events = fpo->revents; 1931 1932 ps->ps_destroy_msg(pm); 1933 error = 0; 1934 1935 out: 1936 node_rele(opc); 1937 return error; 1938 } 1939 1940 /* ARGSUSED0 */ 1941 int 1942 perfuse_node_mmap(struct puffs_usermount *pu, puffs_cookie_t opc, int flags, 1943 const struct puffs_cred *pcr) 1944 { 1945 /* 1946 * Not implemented anymore in libfuse 1947 */ 1948 return ENOSYS; 1949 } 1950 1951 /* ARGSUSED2 */ 1952 int 1953 perfuse_node_fsync(struct puffs_usermount *pu, puffs_cookie_t opc, 1954 const struct puffs_cred *pcr, int flags, off_t offlo, off_t offhi) 1955 { 1956 int op; 1957 perfuse_msg_t *pm; 1958 struct perfuse_state *ps; 1959 struct perfuse_node_data *pnd; 1960 struct fuse_fsync_in *ffi; 1961 uint64_t fh; 1962 int error = 0; 1963 1964 pm = NULL; 1965 ps = puffs_getspecific(pu); 1966 pnd = PERFUSE_NODE_DATA(opc); 1967 1968 /* 1969 * No need to sync a removed node 1970 */ 1971 if (pnd->pnd_flags & PND_REMOVED) 1972 return 0; 1973 1974 /* 1975 * We do not sync closed files. They have been 1976 * sync at inactive time already. 1977 */ 1978 if (!(pnd->pnd_flags & PND_OPEN)) 1979 return 0; 1980 1981 node_ref(opc); 1982 1983 if (puffs_pn_getvap((struct puffs_node *)opc)->va_type == VDIR) 1984 op = FUSE_FSYNCDIR; 1985 else /* VREG but also other types such as VLNK */ 1986 op = FUSE_FSYNC; 1987 1988 /* 1989 * Do not sync if there are no change to sync 1990 * XXX remove that test on files if we implement mmap 1991 */ 1992 #ifdef PERFUSE_DEBUG 1993 if (perfuse_diagflags & PDF_SYNC) 1994 DPRINTF("%s: TEST opc = %p, file = \"%s\" is %sdirty\n", 1995 __func__, (void*)opc, perfuse_node_path(ps, opc), 1996 pnd->pnd_flags & PND_DIRTY ? "" : "not "); 1997 #endif 1998 if (!(pnd->pnd_flags & PND_DIRTY)) 1999 goto out; 2000 2001 /* 2002 * It seems NetBSD can call fsync without open first 2003 * glusterfs complain in such a situation: 2004 * "FSYNC() ERR => -1 (Invalid argument)" 2005 * The file will be closed at inactive time. 2006 * 2007 * We open the directory for reading in order to sync. 2008 * This sounds rather counterintuitive, but it works. 2009 */ 2010 if (!(pnd->pnd_flags & PND_WFH)) { 2011 if ((error = perfuse_node_open(pu, opc, FREAD, pcr)) != 0) 2012 goto out; 2013 } 2014 2015 if (op == FUSE_FSYNCDIR) 2016 fh = perfuse_get_fh(opc, FREAD); 2017 else 2018 fh = perfuse_get_fh(opc, FWRITE); 2019 2020 /* 2021 * If fsync_flags is set, meta data should not be flushed. 2022 */ 2023 pm = ps->ps_new_msg(pu, opc, op, sizeof(*ffi), pcr); 2024 ffi = GET_INPAYLOAD(ps, pm, fuse_fsync_in); 2025 ffi->fh = fh; 2026 ffi->fsync_flags = (flags & FFILESYNC) ? 0 : 1; 2027 2028 #ifdef PERFUSE_DEBUG 2029 if (perfuse_diagflags & PDF_FH) 2030 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", fh = 0x%"PRIx64"\n", 2031 __func__, (void *)opc, 2032 PERFUSE_NODE_DATA(opc)->pnd_nodeid, ffi->fh); 2033 #endif 2034 2035 if ((error = xchg_msg(pu, opc, pm, 2036 NO_PAYLOAD_REPLY_LEN, wait_reply)) != 0) 2037 goto out; 2038 2039 /* 2040 * No reply beyond fuse_out_header: nothing to do on success 2041 * just clear the dirty flag 2042 */ 2043 pnd->pnd_flags &= ~PND_DIRTY; 2044 2045 #ifdef PERFUSE_DEBUG 2046 if (perfuse_diagflags & PDF_SYNC) 2047 DPRINTF("%s: CLEAR opc = %p, file = \"%s\"\n", 2048 __func__, (void*)opc, perfuse_node_path(ps, opc)); 2049 #endif 2050 2051 ps->ps_destroy_msg(pm); 2052 error = 0; 2053 2054 out: 2055 /* 2056 * ENOSYS is not returned to kernel, 2057 */ 2058 if (error == ENOSYS) 2059 error = 0; 2060 2061 node_rele(opc); 2062 return error; 2063 } 2064 2065 /* ARGSUSED0 */ 2066 int 2067 perfuse_node_seek(struct puffs_usermount *pu, puffs_cookie_t opc, 2068 off_t oldoff, off_t newoff, const struct puffs_cred *pcr) 2069 { 2070 return 0; 2071 } 2072 2073 int 2074 perfuse_node_remove(struct puffs_usermount *pu, puffs_cookie_t opc, 2075 puffs_cookie_t targ, const struct puffs_cn *pcn) 2076 { 2077 struct perfuse_state *ps; 2078 struct perfuse_node_data *pnd; 2079 perfuse_msg_t *pm; 2080 char *path; 2081 const char *name; 2082 size_t len; 2083 int error; 2084 2085 pnd = PERFUSE_NODE_DATA(opc); 2086 2087 if ((pnd->pnd_flags & PND_REMOVED) || 2088 (PERFUSE_NODE_DATA(targ)->pnd_flags & PND_REMOVED)) 2089 return ENOENT; 2090 2091 #ifdef PERFUSE_DEBUG 2092 if (targ == NULL) 2093 DERRX(EX_SOFTWARE, "%s: targ is NULL", __func__); 2094 2095 if (perfuse_diagflags & (PDF_FH|PDF_FILENAME)) 2096 DPRINTF("%s: opc = %p, remove opc = %p, file = \"%s\"\n", 2097 __func__, (void *)opc, (void *)targ, pcn->pcn_name); 2098 #endif 2099 node_ref(opc); 2100 node_ref(targ); 2101 2102 /* 2103 * Await for all operations on the deleted node to drain, 2104 * as the filesystem may be confused to have it deleted 2105 * during a getattr 2106 */ 2107 while (PERFUSE_NODE_DATA(targ)->pnd_inxchg) 2108 requeue_request(pu, targ, PCQ_AFTERXCHG); 2109 2110 ps = puffs_getspecific(pu); 2111 pnd = PERFUSE_NODE_DATA(opc); 2112 name = pcn->pcn_name; 2113 len = pcn->pcn_namelen + 1; 2114 2115 pm = ps->ps_new_msg(pu, opc, FUSE_UNLINK, len, pcn->pcn_cred); 2116 path = _GET_INPAYLOAD(ps, pm, char *); 2117 (void)strlcpy(path, name, len); 2118 2119 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 2120 goto out; 2121 2122 perfuse_cache_flush(targ); 2123 PERFUSE_NODE_DATA(targ)->pnd_flags |= PND_REMOVED; 2124 2125 if (!(PERFUSE_NODE_DATA(targ)->pnd_flags & PND_OPEN)) 2126 puffs_setback(puffs_cc_getcc(pu), PUFFS_SETBACK_NOREF_N2); 2127 2128 /* 2129 * The parent directory needs a sync 2130 */ 2131 PERFUSE_NODE_DATA(opc)->pnd_flags |= PND_DIRTY; 2132 2133 #ifdef PERFUSE_DEBUG 2134 if (perfuse_diagflags & PDF_FILENAME) 2135 DPRINTF("%s: remove nodeid = 0x%"PRIx64" file = \"%s\"\n", 2136 __func__, PERFUSE_NODE_DATA(targ)->pnd_nodeid, 2137 pcn->pcn_name); 2138 #endif 2139 ps->ps_destroy_msg(pm); 2140 error = 0; 2141 2142 out: 2143 node_rele(opc); 2144 node_rele(targ); 2145 return error; 2146 } 2147 2148 int 2149 perfuse_node_link(struct puffs_usermount *pu, puffs_cookie_t opc, 2150 puffs_cookie_t targ, const struct puffs_cn *pcn) 2151 { 2152 struct perfuse_state *ps; 2153 perfuse_msg_t *pm; 2154 const char *name; 2155 size_t len; 2156 struct puffs_node *pn; 2157 struct fuse_link_in *fli; 2158 int error; 2159 2160 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 2161 return ENOENT; 2162 2163 node_ref(opc); 2164 node_ref(targ); 2165 ps = puffs_getspecific(pu); 2166 pn = (struct puffs_node *)targ; 2167 name = pcn->pcn_name; 2168 len = sizeof(*fli) + pcn->pcn_namelen + 1; 2169 2170 pm = ps->ps_new_msg(pu, opc, FUSE_LINK, len, pcn->pcn_cred); 2171 fli = GET_INPAYLOAD(ps, pm, fuse_link_in); 2172 fli->oldnodeid = PERFUSE_NODE_DATA(pn)->pnd_nodeid; 2173 (void)strlcpy((char *)(void *)(fli + 1), name, len - sizeof(*fli)); 2174 2175 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 2176 goto out; 2177 2178 ps->ps_destroy_msg(pm); 2179 error = 0; 2180 2181 out: 2182 node_rele(opc); 2183 node_rele(targ); 2184 return error; 2185 } 2186 2187 int 2188 perfuse_node_rename(struct puffs_usermount *pu, puffs_cookie_t opc, 2189 puffs_cookie_t src, const struct puffs_cn *pcn_src, 2190 puffs_cookie_t targ_dir, puffs_cookie_t targ, 2191 const struct puffs_cn *pcn_targ) 2192 { 2193 struct perfuse_state *ps; 2194 struct perfuse_node_data *dstdir_pnd; 2195 perfuse_msg_t *pm; 2196 struct fuse_rename_in *fri; 2197 const char *newname; 2198 const char *oldname; 2199 char *np; 2200 int error; 2201 size_t len; 2202 size_t newname_len; 2203 size_t oldname_len; 2204 2205 if ((PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) || 2206 (PERFUSE_NODE_DATA(src)->pnd_flags & PND_REMOVED) || 2207 (PERFUSE_NODE_DATA(targ_dir)->pnd_flags & PND_REMOVED)) 2208 return ENOENT; 2209 2210 node_ref(opc); 2211 node_ref(src); 2212 2213 /* 2214 * Await for all operations on the deleted node to drain, 2215 * as the filesystem may be confused to have it deleted 2216 * during a getattr 2217 */ 2218 if ((struct puffs_node *)targ != NULL) { 2219 node_ref(targ); 2220 while (PERFUSE_NODE_DATA(targ)->pnd_inxchg) 2221 requeue_request(pu, targ, PCQ_AFTERXCHG); 2222 } else { 2223 while (PERFUSE_NODE_DATA(src)->pnd_inxchg) 2224 requeue_request(pu, src, PCQ_AFTERXCHG); 2225 } 2226 2227 ps = puffs_getspecific(pu); 2228 newname = pcn_targ->pcn_name; 2229 newname_len = pcn_targ->pcn_namelen + 1; 2230 oldname = pcn_src->pcn_name; 2231 oldname_len = pcn_src->pcn_namelen + 1; 2232 2233 len = sizeof(*fri) + oldname_len + newname_len; 2234 pm = ps->ps_new_msg(pu, opc, FUSE_RENAME, len, pcn_targ->pcn_cred); 2235 fri = GET_INPAYLOAD(ps, pm, fuse_rename_in); 2236 fri->newdir = PERFUSE_NODE_DATA(targ_dir)->pnd_nodeid; 2237 np = (char *)(void *)(fri + 1); 2238 (void)strlcpy(np, oldname, oldname_len); 2239 np += oldname_len; 2240 (void)strlcpy(np, newname, newname_len); 2241 2242 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 2243 goto out; 2244 2245 2246 /* 2247 * Record new parent nodeid 2248 */ 2249 dstdir_pnd = PERFUSE_NODE_DATA(targ_dir); 2250 PERFUSE_NODE_DATA(src)->pnd_parent_nodeid = dstdir_pnd->pnd_nodeid; 2251 2252 if (opc != targ_dir) 2253 dstdir_pnd->pnd_flags |= PND_DIRTY; 2254 2255 if (strcmp(newname, "..") != 0) 2256 (void)strlcpy(PERFUSE_NODE_DATA(src)->pnd_name, 2257 newname, MAXPATHLEN); 2258 else 2259 PERFUSE_NODE_DATA(src)->pnd_name[0] = 0; /* forget name */ 2260 2261 PERFUSE_NODE_DATA(opc)->pnd_flags |= PND_DIRTY; 2262 2263 if ((struct puffs_node *)targ != NULL) { 2264 perfuse_cache_flush(targ); 2265 PERFUSE_NODE_DATA(targ)->pnd_flags |= PND_REMOVED; 2266 } 2267 2268 #ifdef PERFUSE_DEBUG 2269 if (perfuse_diagflags & PDF_FILENAME) 2270 DPRINTF("%s: nodeid = 0x%"PRIx64" file = \"%s\" renamed \"%s\" " 2271 "nodeid = 0x%"PRIx64" -> nodeid = 0x%"PRIx64" \"%s\"\n", 2272 __func__, PERFUSE_NODE_DATA(src)->pnd_nodeid, 2273 pcn_src->pcn_name, pcn_targ->pcn_name, 2274 PERFUSE_NODE_DATA(opc)->pnd_nodeid, 2275 PERFUSE_NODE_DATA(targ_dir)->pnd_nodeid, 2276 perfuse_node_path(ps, targ_dir)); 2277 #endif 2278 2279 ps->ps_destroy_msg(pm); 2280 error = 0; 2281 2282 out: 2283 node_rele(opc); 2284 node_rele(src); 2285 if ((struct puffs_node *)targ != NULL) 2286 node_rele(targ); 2287 2288 return error; 2289 } 2290 2291 int 2292 perfuse_node_mkdir(struct puffs_usermount *pu, puffs_cookie_t opc, 2293 struct puffs_newinfo *pni, const struct puffs_cn *pcn, 2294 const struct vattr *vap) 2295 { 2296 struct perfuse_state *ps; 2297 perfuse_msg_t *pm; 2298 struct fuse_mkdir_in *fmi; 2299 const char *path; 2300 size_t len; 2301 int error; 2302 2303 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 2304 return ENOENT; 2305 2306 node_ref(opc); 2307 ps = puffs_getspecific(pu); 2308 path = pcn->pcn_name; 2309 len = sizeof(*fmi) + pcn->pcn_namelen + 1; 2310 2311 pm = ps->ps_new_msg(pu, opc, FUSE_MKDIR, len, pcn->pcn_cred); 2312 fmi = GET_INPAYLOAD(ps, pm, fuse_mkdir_in); 2313 fmi->mode = vap->va_mode; 2314 fmi->umask = 0; /* Seems unused by libfuse? */ 2315 (void)strlcpy((char *)(void *)(fmi + 1), path, len - sizeof(*fmi)); 2316 2317 error = node_mk_common(pu, opc, pni, pcn, pm); 2318 2319 node_rele(opc); 2320 return error; 2321 } 2322 2323 2324 int 2325 perfuse_node_rmdir(struct puffs_usermount *pu, puffs_cookie_t opc, 2326 puffs_cookie_t targ, const struct puffs_cn *pcn) 2327 { 2328 struct perfuse_state *ps; 2329 struct perfuse_node_data *pnd; 2330 perfuse_msg_t *pm; 2331 char *path; 2332 const char *name; 2333 size_t len; 2334 int error; 2335 2336 pnd = PERFUSE_NODE_DATA(opc); 2337 2338 if ((pnd->pnd_flags & PND_REMOVED) || 2339 (PERFUSE_NODE_DATA(targ)->pnd_flags & PND_REMOVED)) 2340 return ENOENT; 2341 2342 node_ref(opc); 2343 node_ref(targ); 2344 2345 /* 2346 * Await for all operations on the deleted node to drain, 2347 * as the filesystem may be confused to have it deleted 2348 * during a getattr 2349 */ 2350 while (PERFUSE_NODE_DATA(targ)->pnd_inxchg) 2351 requeue_request(pu, targ, PCQ_AFTERXCHG); 2352 2353 ps = puffs_getspecific(pu); 2354 name = pcn->pcn_name; 2355 len = pcn->pcn_namelen + 1; 2356 2357 pm = ps->ps_new_msg(pu, opc, FUSE_RMDIR, len, pcn->pcn_cred); 2358 path = _GET_INPAYLOAD(ps, pm, char *); 2359 (void)strlcpy(path, name, len); 2360 2361 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 2362 goto out; 2363 2364 perfuse_cache_flush(targ); 2365 PERFUSE_NODE_DATA(targ)->pnd_flags |= PND_REMOVED; 2366 2367 if (!(PERFUSE_NODE_DATA(targ)->pnd_flags & PND_OPEN)) 2368 puffs_setback(puffs_cc_getcc(pu), PUFFS_SETBACK_NOREF_N2); 2369 2370 /* 2371 * The parent directory needs a sync 2372 */ 2373 PERFUSE_NODE_DATA(opc)->pnd_flags |= PND_DIRTY; 2374 2375 #ifdef PERFUSE_DEBUG 2376 if (perfuse_diagflags & PDF_FILENAME) 2377 DPRINTF("%s: remove nodeid = 0x%"PRIx64" file = \"%s\"\n", 2378 __func__, PERFUSE_NODE_DATA(targ)->pnd_nodeid, 2379 perfuse_node_path(ps, targ)); 2380 #endif 2381 ps->ps_destroy_msg(pm); 2382 error = 0; 2383 2384 out: 2385 node_rele(opc); 2386 node_rele(targ); 2387 return error; 2388 } 2389 2390 /* vap is unused */ 2391 /* ARGSUSED4 */ 2392 int 2393 perfuse_node_symlink(struct puffs_usermount *pu, puffs_cookie_t opc, 2394 struct puffs_newinfo *pni, const struct puffs_cn *pcn_src, 2395 const struct vattr *vap, const char *link_target) 2396 { 2397 struct perfuse_state *ps; 2398 perfuse_msg_t *pm; 2399 char *np; 2400 const char *path; 2401 size_t path_len; 2402 size_t linkname_len; 2403 size_t len; 2404 int error; 2405 2406 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 2407 return ENOENT; 2408 2409 node_ref(opc); 2410 ps = puffs_getspecific(pu); 2411 path = pcn_src->pcn_name; 2412 path_len = pcn_src->pcn_namelen + 1; 2413 linkname_len = strlen(link_target) + 1; 2414 len = path_len + linkname_len; 2415 2416 pm = ps->ps_new_msg(pu, opc, FUSE_SYMLINK, len, pcn_src->pcn_cred); 2417 np = _GET_INPAYLOAD(ps, pm, char *); 2418 (void)strlcpy(np, path, path_len); 2419 np += path_len; 2420 (void)strlcpy(np, link_target, linkname_len); 2421 2422 error = node_mk_common(pu, opc, pni, pcn_src, pm); 2423 2424 node_rele(opc); 2425 return error; 2426 } 2427 2428 /* ARGSUSED4 */ 2429 int 2430 perfuse_node_readdir(struct puffs_usermount *pu, puffs_cookie_t opc, 2431 struct dirent *dent, off_t *readoff, size_t *reslen, 2432 const struct puffs_cred *pcr, int *eofflag, off_t *cookies, 2433 size_t *ncookies) 2434 { 2435 perfuse_msg_t *pm; 2436 uint64_t fh; 2437 struct perfuse_state *ps; 2438 struct perfuse_node_data *pnd; 2439 struct fuse_read_in *fri; 2440 struct fuse_out_header *foh; 2441 struct fuse_dirent *fd; 2442 size_t foh_len; 2443 int error; 2444 size_t fd_maxlen; 2445 2446 error = 0; 2447 node_ref(opc); 2448 ps = puffs_getspecific(pu); 2449 2450 /* 2451 * readdir state is kept at node level, and several readdir 2452 * requests can be issued at the same time on the same node. 2453 * We need to queue requests so that only one is in readdir 2454 * code at the same time. 2455 */ 2456 pnd = PERFUSE_NODE_DATA(opc); 2457 while (pnd->pnd_flags & PND_INREADDIR) 2458 requeue_request(pu, opc, PCQ_READDIR); 2459 pnd->pnd_flags |= PND_INREADDIR; 2460 2461 #ifdef PERFUSE_DEBUG 2462 if (perfuse_diagflags & PDF_READDIR) 2463 DPRINTF("%s: READDIR opc = %p enter critical section\n", 2464 __func__, (void *)opc); 2465 #endif 2466 /* 2467 * Re-initialize pnd->pnd_fd_cookie on the first readdir for a node 2468 */ 2469 if (*readoff == 0) 2470 pnd->pnd_fd_cookie = 0; 2471 2472 /* 2473 * Do we already have the data bufered? 2474 */ 2475 if (pnd->pnd_dirent != NULL) 2476 goto out; 2477 pnd->pnd_dirent_len = 0; 2478 2479 /* 2480 * It seems NetBSD can call readdir without open first 2481 * libfuse will crash if it is done that way, hence open first. 2482 */ 2483 if (!(pnd->pnd_flags & PND_OPEN)) { 2484 if ((error = perfuse_node_open(pu, opc, FREAD, pcr)) != 0) 2485 goto out; 2486 } 2487 2488 fh = perfuse_get_fh(opc, FREAD); 2489 2490 #ifdef PERFUSE_DEBUG 2491 if (perfuse_diagflags & PDF_FH) 2492 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", " 2493 "rfh = 0x%"PRIx64"\n", __func__, (void *)opc, 2494 PERFUSE_NODE_DATA(opc)->pnd_nodeid, fh); 2495 #endif 2496 2497 pnd->pnd_all_fd = NULL; 2498 pnd->pnd_all_fd_len = 0; 2499 fd_maxlen = ps->ps_max_readahead - sizeof(*foh); 2500 2501 do { 2502 size_t fd_len; 2503 char *afdp; 2504 2505 pm = ps->ps_new_msg(pu, opc, FUSE_READDIR, sizeof(*fri), pcr); 2506 2507 /* 2508 * read_flags, lock_owner and flags are unused in libfuse 2509 */ 2510 fri = GET_INPAYLOAD(ps, pm, fuse_read_in); 2511 fri->fh = fh; 2512 fri->offset = pnd->pnd_fd_cookie; 2513 fri->size = (uint32_t)fd_maxlen; 2514 fri->read_flags = 0; 2515 fri->lock_owner = 0; 2516 fri->flags = 0; 2517 2518 if ((error = xchg_msg(pu, opc, pm, 2519 UNSPEC_REPLY_LEN, wait_reply)) != 0) 2520 goto out; 2521 2522 /* 2523 * There are many puffs_framebufs calls later, 2524 * therefore foh will not be valid for a long time. 2525 * Just get the length and forget it. 2526 */ 2527 foh = GET_OUTHDR(ps, pm); 2528 foh_len = foh->len; 2529 2530 /* 2531 * Empty read: we reached the end of the buffer. 2532 */ 2533 if (foh_len == sizeof(*foh)) { 2534 ps->ps_destroy_msg(pm); 2535 *eofflag = 1; 2536 break; 2537 } 2538 2539 /* 2540 * Check for corrupted message. 2541 */ 2542 if (foh_len < sizeof(*foh) + sizeof(*fd)) { 2543 ps->ps_destroy_msg(pm); 2544 DWARNX("readdir reply too short"); 2545 error = EIO; 2546 goto out; 2547 } 2548 2549 2550 fd = GET_OUTPAYLOAD(ps, pm, fuse_dirent); 2551 fd_len = foh_len - sizeof(*foh); 2552 2553 pnd->pnd_all_fd = realloc(pnd->pnd_all_fd, 2554 pnd->pnd_all_fd_len + fd_len); 2555 if (pnd->pnd_all_fd == NULL) 2556 DERR(EX_OSERR, "%s: malloc failed", __func__); 2557 2558 afdp = (char *)(void *)pnd->pnd_all_fd + pnd->pnd_all_fd_len; 2559 (void)memcpy(afdp, fd, fd_len); 2560 2561 pnd->pnd_all_fd_len += fd_len; 2562 2563 /* 2564 * The fd->off field is used as a cookie for 2565 * resuming the next readdir() where this one was left. 2566 */ 2567 pnd->pnd_fd_cookie = readdir_last_cookie(fd, fd_len); 2568 2569 ps->ps_destroy_msg(pm); 2570 } while (1 /* CONSTCOND */); 2571 2572 if (pnd->pnd_all_fd != NULL) { 2573 if (fuse_to_dirent(pu, opc, pnd->pnd_all_fd, 2574 pnd->pnd_all_fd_len) == -1) 2575 error = EIO; 2576 } 2577 2578 out: 2579 if (pnd->pnd_all_fd != NULL) { 2580 free(pnd->pnd_all_fd); 2581 pnd->pnd_all_fd = NULL; 2582 pnd->pnd_all_fd_len = 0; 2583 } 2584 2585 if (error == 0) 2586 readdir_buffered(opc, dent, readoff, reslen); 2587 2588 /* 2589 * Schedule queued readdir requests 2590 */ 2591 pnd->pnd_flags &= ~PND_INREADDIR; 2592 (void)dequeue_requests(opc, PCQ_READDIR, DEQUEUE_ALL); 2593 2594 #ifdef PERFUSE_DEBUG 2595 if (perfuse_diagflags & PDF_READDIR) 2596 DPRINTF("%s: READDIR opc = %p exit critical section\n", 2597 __func__, (void *)opc); 2598 #endif 2599 2600 node_rele(opc); 2601 return error; 2602 } 2603 2604 int 2605 perfuse_node_readlink(struct puffs_usermount *pu, puffs_cookie_t opc, 2606 const struct puffs_cred *pcr, char *linkname, size_t *linklen) 2607 { 2608 struct perfuse_state *ps; 2609 perfuse_msg_t *pm; 2610 int error; 2611 size_t len; 2612 struct fuse_out_header *foh; 2613 2614 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 2615 return ENOENT; 2616 2617 node_ref(opc); 2618 ps = puffs_getspecific(pu); 2619 2620 pm = ps->ps_new_msg(pu, opc, FUSE_READLINK, 0, pcr); 2621 2622 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 2623 goto out; 2624 2625 foh = GET_OUTHDR(ps, pm); 2626 len = foh->len - sizeof(*foh); 2627 if (len > *linklen) 2628 DERRX(EX_PROTOCOL, "path len = %zd too long", len); 2629 if (len == 0) 2630 DERRX(EX_PROTOCOL, "path len = %zd too short", len); 2631 2632 /* 2633 * FUSE filesystems return a NUL terminated string, we 2634 * do not want to trailing \0 2635 */ 2636 *linklen = len - 1; 2637 (void)memcpy(linkname, _GET_OUTPAYLOAD(ps, pm, char *), len); 2638 2639 ps->ps_destroy_msg(pm); 2640 error = 0; 2641 2642 out: 2643 node_rele(opc); 2644 return error; 2645 } 2646 2647 int 2648 perfuse_node_reclaim(struct puffs_usermount *pu, puffs_cookie_t opc) 2649 { 2650 struct perfuse_state *ps; 2651 perfuse_msg_t *pm; 2652 struct perfuse_node_data *pnd; 2653 struct fuse_forget_in *ffi; 2654 int nlookup; 2655 struct timespec now; 2656 2657 if (opc == 0) 2658 return 0; 2659 2660 ps = puffs_getspecific(pu); 2661 pnd = PERFUSE_NODE_DATA(opc); 2662 2663 /* 2664 * Never forget the root. 2665 */ 2666 if (pnd->pnd_nodeid == FUSE_ROOT_ID) 2667 return 0; 2668 2669 /* 2670 * There is a race condition between reclaim and lookup. 2671 * When looking up an already known node, the kernel cannot 2672 * hold a reference on the result until it gets the PUFFS 2673 * reply. It mayy therefore reclaim the node after the 2674 * userland looked it up, and before it gets the reply. 2675 * On rely, the kernel re-creates the node, but at that 2676 * time the node has been reclaimed in userland. 2677 * 2678 * In order to avoid this, we refuse reclaiming nodes that 2679 * are too young since the last lookup - and that we do 2680 * not have removed on our own, of course. 2681 */ 2682 if (clock_gettime(CLOCK_REALTIME, &now) != 0) 2683 DERR(EX_OSERR, "clock_gettime failed"); 2684 2685 if (timespeccmp(&pnd->pnd_cn_expire, &now, >) && 2686 !(pnd->pnd_flags & PND_REMOVED)) { 2687 if (!(pnd->pnd_flags & PND_NODELEAK)) { 2688 ps->ps_nodeleakcount++; 2689 pnd->pnd_flags |= PND_NODELEAK; 2690 } 2691 DWARNX("possible leaked node:: opc = %p \"%s\"", 2692 opc, pnd->pnd_name); 2693 return 0; 2694 } 2695 2696 node_ref(opc); 2697 pnd->pnd_flags |= PND_RECLAIMED; 2698 pnd->pnd_puffs_nlookup--; 2699 nlookup = pnd->pnd_puffs_nlookup; 2700 2701 #ifdef PERFUSE_DEBUG 2702 if (perfuse_diagflags & PDF_RECLAIM) 2703 DPRINTF("%s (nodeid %"PRId64") reclaimed\n", 2704 perfuse_node_path(ps, opc), pnd->pnd_nodeid); 2705 #endif 2706 2707 #ifdef PERFUSE_DEBUG 2708 if (perfuse_diagflags & PDF_RECLAIM) 2709 DPRINTF("%s (nodeid %"PRId64") is %sreclaimed, nlookup = %d " 2710 "%s%s%s%s, pending ops:%s%s%s\n", 2711 perfuse_node_path(ps, opc), pnd->pnd_nodeid, 2712 pnd->pnd_flags & PND_RECLAIMED ? "" : "not ", 2713 pnd->pnd_puffs_nlookup, 2714 pnd->pnd_flags & PND_OPEN ? "open " : "not open", 2715 pnd->pnd_flags & PND_RFH ? "r" : "", 2716 pnd->pnd_flags & PND_WFH ? "w" : "", 2717 pnd->pnd_flags & PND_BUSY ? "" : " none", 2718 pnd->pnd_flags & PND_INREADDIR ? " readdir" : "", 2719 pnd->pnd_flags & PND_INWRITE ? " write" : "", 2720 pnd->pnd_flags & PND_INOPEN ? " open" : ""); 2721 #endif 2722 /* 2723 * Make sure it is not looked up again 2724 */ 2725 if (!(pnd->pnd_flags & PND_REMOVED)) 2726 perfuse_cache_flush(opc); 2727 2728 /* 2729 * Purge any activity on the node, while checking 2730 * that it remains eligible for a reclaim. 2731 */ 2732 while (pnd->pnd_ref > 1) 2733 requeue_request(pu, opc, PCQ_REF); 2734 2735 /* 2736 * reclaim cancel? 2737 */ 2738 if (pnd->pnd_puffs_nlookup > nlookup) { 2739 pnd->pnd_flags &= ~PND_RECLAIMED; 2740 perfuse_node_cache(ps, opc); 2741 node_rele(opc); 2742 return 0; 2743 } 2744 2745 2746 #ifdef PERFUSE_DEBUG 2747 if ((pnd->pnd_flags & PND_OPEN) || 2748 !TAILQ_EMPTY(&pnd->pnd_pcq)) 2749 DERRX(EX_SOFTWARE, "%s: opc = %p \"%s\": still open", 2750 __func__, opc, pnd->pnd_name); 2751 2752 if ((pnd->pnd_flags & PND_BUSY) || 2753 !TAILQ_EMPTY(&pnd->pnd_pcq)) 2754 DERRX(EX_SOFTWARE, "%s: opc = %p: queued operations", 2755 __func__, opc); 2756 2757 if (pnd->pnd_inxchg != 0) 2758 DERRX(EX_SOFTWARE, "%s: opc = %p: ongoing operations", 2759 __func__, opc); 2760 #endif 2761 2762 /* 2763 * Send the FORGET message 2764 * 2765 * ps_new_msg() is called with NULL creds, which will 2766 * be interpreted as FUSE superuser. This is obviously 2767 * fine since we operate with kernel creds here. 2768 */ 2769 pm = ps->ps_new_msg(pu, opc, FUSE_FORGET, 2770 sizeof(*ffi), NULL); 2771 ffi = GET_INPAYLOAD(ps, pm, fuse_forget_in); 2772 ffi->nlookup = pnd->pnd_fuse_nlookup; 2773 2774 /* 2775 * No reply is expected, pm is freed in xchg_msg 2776 */ 2777 (void)xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, no_reply); 2778 2779 perfuse_destroy_pn(pu, opc); 2780 2781 return 0; 2782 } 2783 2784 int 2785 perfuse_node_inactive(struct puffs_usermount *pu, puffs_cookie_t opc) 2786 { 2787 struct perfuse_node_data *pnd; 2788 int error; 2789 2790 if (opc == 0) 2791 return 0; 2792 2793 node_ref(opc); 2794 pnd = PERFUSE_NODE_DATA(opc); 2795 2796 if (!(pnd->pnd_flags & (PND_OPEN|PND_REMOVED))) 2797 goto out; 2798 2799 /* 2800 * Make sure all operation are finished 2801 * There can be an ongoing write. Other 2802 * operation wait for all data before 2803 * the close/inactive. 2804 */ 2805 while (pnd->pnd_flags & PND_INWRITE) 2806 requeue_request(pu, opc, PCQ_AFTERWRITE); 2807 2808 /* 2809 * The inactive operation may be cancelled, 2810 * If no open is in progress, set PND_INOPEN 2811 * so that a new open will be queued. 2812 */ 2813 if (pnd->pnd_flags & PND_INOPEN) 2814 goto out; 2815 2816 pnd->pnd_flags |= PND_INOPEN; 2817 2818 /* 2819 * Sync data 2820 */ 2821 if (pnd->pnd_flags & PND_DIRTY) { 2822 if ((error = perfuse_node_fsync(pu, opc, NULL, 0, 0, 0)) != 0) 2823 DWARN("%s: perfuse_node_fsync failed error = %d", 2824 __func__, error); 2825 } 2826 2827 2828 /* 2829 * Close handles 2830 */ 2831 if (pnd->pnd_flags & PND_WFH) { 2832 if ((error = perfuse_node_close_common(pu, opc, FWRITE)) != 0) 2833 DWARN("%s: close write FH failed error = %d", 2834 __func__, error); 2835 } 2836 2837 if (pnd->pnd_flags & PND_RFH) { 2838 if ((error = perfuse_node_close_common(pu, opc, FREAD)) != 0) 2839 DWARN("%s: close read FH failed error = %d", 2840 __func__, error); 2841 } 2842 2843 /* 2844 * This will cause a reclaim to be sent 2845 */ 2846 if (pnd->pnd_flags & PND_REMOVED) 2847 puffs_setback(puffs_cc_getcc(pu), PUFFS_SETBACK_NOREF_N1); 2848 2849 /* 2850 * Schedule awaiting operations 2851 */ 2852 pnd->pnd_flags &= ~PND_INOPEN; 2853 (void)dequeue_requests(opc, PCQ_OPEN, DEQUEUE_ALL); 2854 2855 /* 2856 * errors are ignored, since the kernel ignores the return code. 2857 */ 2858 out: 2859 node_rele(opc); 2860 return 0; 2861 } 2862 2863 2864 /* ARGSUSED0 */ 2865 int 2866 perfuse_node_print(struct puffs_usermount *pu, puffs_cookie_t opc) 2867 { 2868 DERRX(EX_SOFTWARE, "%s: UNIMPLEMENTED (FATAL)", __func__); 2869 return 0; 2870 } 2871 2872 /* ARGSUSED0 */ 2873 int 2874 perfuse_node_pathconf(struct puffs_usermount *pu, puffs_cookie_t opc, 2875 int name, int *retval) 2876 { 2877 DERRX(EX_SOFTWARE, "%s: UNIMPLEMENTED (FATAL)", __func__); 2878 return 0; 2879 } 2880 2881 int 2882 perfuse_node_advlock(struct puffs_usermount *pu, puffs_cookie_t opc, 2883 void *id, int op, struct flock *fl, int flags) 2884 { 2885 struct perfuse_state *ps; 2886 int fop; 2887 perfuse_msg_t *pm; 2888 uint64_t fh; 2889 struct fuse_lk_in *fli; 2890 struct fuse_out_header *foh; 2891 struct fuse_lk_out *flo; 2892 uint32_t owner; 2893 size_t len; 2894 int error; 2895 2896 node_ref(opc); 2897 2898 /* 2899 * Make sure we do have a filehandle, as the FUSE filesystem 2900 * expect one. E.g.: if we provide none, GlusterFS logs an error 2901 * "0-glusterfs-fuse: xl is NULL" 2902 * 2903 * We need the read file handle if the file is open read only, 2904 * in order to support shared locks on read-only files. 2905 * NB: The kernel always sends advlock for read-only 2906 * files at exit time when the process used lock, see 2907 * sys_exit -> exit1 -> fd_free -> fd_close -> VOP_ADVLOCK 2908 */ 2909 if ((fh = perfuse_get_fh(opc, FREAD)) == FUSE_UNKNOWN_FH) { 2910 error = EBADF; 2911 goto out; 2912 } 2913 2914 ps = puffs_getspecific(pu); 2915 2916 if (op == F_GETLK) 2917 fop = FUSE_GETLK; 2918 else 2919 fop = (flags & F_WAIT) ? FUSE_SETLKW : FUSE_SETLK; 2920 2921 /* 2922 * XXX ps_new_msg() is called with NULL creds, which will 2923 * be interpreted as FUSE superuser. We have no way to 2924 * know the requesting process' credential, but since advlock() 2925 * is supposed to operate on a file that has been open(), 2926 * permission should have already been checked at open() time. 2927 */ 2928 pm = ps->ps_new_msg(pu, opc, fop, sizeof(*fli), NULL); 2929 fli = GET_INPAYLOAD(ps, pm, fuse_lk_in); 2930 fli->fh = fh; 2931 fli->owner = (uint64_t)(vaddr_t)id; 2932 fli->lk.start = fl->l_start; 2933 fli->lk.end = fl->l_start + fl->l_len; 2934 fli->lk.type = fl->l_type; 2935 fli->lk.pid = fl->l_pid; 2936 fli->lk_flags = (flags & F_FLOCK) ? FUSE_LK_FLOCK : 0; 2937 2938 owner = (uint32_t)(vaddr_t)id; 2939 2940 #ifdef PERFUSE_DEBUG 2941 if (perfuse_diagflags & PDF_FH) 2942 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", fh = 0x%"PRIx64"\n", 2943 __func__, (void *)opc, 2944 PERFUSE_NODE_DATA(opc)->pnd_nodeid, fli->fh); 2945 #endif 2946 2947 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 2948 goto out; 2949 2950 foh = GET_OUTHDR(ps, pm); 2951 len = foh->len - sizeof(*foh); 2952 2953 /* 2954 * Save or clear the lock 2955 */ 2956 switch (op) { 2957 case F_GETLK: 2958 if (len != sizeof(*flo)) 2959 DERRX(EX_SOFTWARE, 2960 "%s: Unexpected lock reply len %zd", 2961 __func__, len); 2962 2963 flo = GET_OUTPAYLOAD(ps, pm, fuse_lk_out); 2964 fl->l_start = flo->lk.start; 2965 fl->l_len = flo->lk.end - flo->lk.start; 2966 fl->l_pid = flo->lk.pid; 2967 fl->l_type = flo->lk.type; 2968 fl->l_whence = SEEK_SET; /* libfuse hardcodes it */ 2969 2970 PERFUSE_NODE_DATA(opc)->pnd_lock_owner = flo->lk.pid; 2971 break; 2972 case F_UNLCK: 2973 owner = 0; 2974 /* FALLTHROUGH */ 2975 case F_SETLK: 2976 /* FALLTHROUGH */ 2977 case F_SETLKW: 2978 if (error != 0) 2979 PERFUSE_NODE_DATA(opc)->pnd_lock_owner = owner; 2980 2981 if (len != 0) 2982 DERRX(EX_SOFTWARE, 2983 "%s: Unexpected unlock reply len %zd", 2984 __func__, len); 2985 2986 break; 2987 default: 2988 DERRX(EX_SOFTWARE, "%s: Unexpected op %d", __func__, op); 2989 break; 2990 } 2991 2992 ps->ps_destroy_msg(pm); 2993 error = 0; 2994 2995 out: 2996 node_rele(opc); 2997 return error; 2998 } 2999 3000 int 3001 perfuse_node_read(struct puffs_usermount *pu, puffs_cookie_t opc, uint8_t *buf, 3002 off_t offset, size_t *resid, const struct puffs_cred *pcr, int ioflag) 3003 { 3004 struct perfuse_state *ps; 3005 struct perfuse_node_data *pnd; 3006 const struct vattr *vap; 3007 perfuse_msg_t *pm; 3008 struct fuse_read_in *fri; 3009 struct fuse_out_header *foh; 3010 size_t readen; 3011 int error; 3012 3013 ps = puffs_getspecific(pu); 3014 pnd = PERFUSE_NODE_DATA(opc); 3015 vap = puffs_pn_getvap((struct puffs_node *)opc); 3016 3017 /* 3018 * NetBSD turns that into a getdents(2) output 3019 * We just do a EISDIR as this feature is of little use. 3020 */ 3021 if (vap->va_type == VDIR) 3022 return EISDIR; 3023 3024 if ((u_quad_t)offset + *resid > vap->va_size) 3025 DWARNX("%s %p read %lld@%zu beyond EOF %" PRIu64 "\n", 3026 __func__, (void *)opc, (long long)offset, 3027 *resid, vap->va_size); 3028 3029 do { 3030 size_t max_read; 3031 3032 max_read = ps->ps_max_readahead - sizeof(*foh); 3033 /* 3034 * flags may be set to FUSE_READ_LOCKOWNER 3035 * if lock_owner is provided. 3036 */ 3037 pm = ps->ps_new_msg(pu, opc, FUSE_READ, sizeof(*fri), pcr); 3038 fri = GET_INPAYLOAD(ps, pm, fuse_read_in); 3039 fri->fh = perfuse_get_fh(opc, FREAD); 3040 fri->offset = offset; 3041 fri->size = (uint32_t)MIN(*resid, max_read); 3042 fri->read_flags = 0; /* XXX Unused by libfuse? */ 3043 fri->lock_owner = pnd->pnd_lock_owner; 3044 fri->flags = 0; 3045 fri->flags |= (fri->lock_owner != 0) ? FUSE_READ_LOCKOWNER : 0; 3046 3047 #ifdef PERFUSE_DEBUG 3048 if (perfuse_diagflags & PDF_FH) 3049 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", fh = 0x%"PRIx64"\n", 3050 __func__, (void *)opc, pnd->pnd_nodeid, fri->fh); 3051 #endif 3052 error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply); 3053 if (error != 0) 3054 return error; 3055 3056 foh = GET_OUTHDR(ps, pm); 3057 readen = foh->len - sizeof(*foh); 3058 3059 #ifdef PERFUSE_DEBUG 3060 if (readen > *resid) 3061 DERRX(EX_SOFTWARE, "%s: Unexpected big read %zd", 3062 __func__, readen); 3063 #endif 3064 3065 (void)memcpy(buf, _GET_OUTPAYLOAD(ps, pm, char *), readen); 3066 3067 buf += readen; 3068 offset += readen; 3069 *resid -= readen; 3070 3071 ps->ps_destroy_msg(pm); 3072 } while ((*resid != 0) && (readen != 0)); 3073 3074 if (ioflag & (IO_SYNC|IO_DSYNC)) 3075 ps->ps_syncreads++; 3076 else 3077 ps->ps_asyncreads++; 3078 3079 return 0; 3080 } 3081 3082 int 3083 perfuse_node_write(struct puffs_usermount *pu, puffs_cookie_t opc, 3084 uint8_t *buf, off_t offset, size_t *resid, 3085 const struct puffs_cred *pcr, int ioflag) 3086 { 3087 return perfuse_node_write2(pu, opc, buf, offset, resid, pcr, ioflag, 0); 3088 } 3089 3090 /* ARGSUSED7 */ 3091 int 3092 perfuse_node_write2(struct puffs_usermount *pu, puffs_cookie_t opc, 3093 uint8_t *buf, off_t offset, size_t *resid, 3094 const struct puffs_cred *pcr, int ioflag, int xflag) 3095 { 3096 struct perfuse_state *ps; 3097 struct perfuse_node_data *pnd; 3098 struct vattr *vap; 3099 perfuse_msg_t *pm; 3100 struct fuse_write_in *fwi; 3101 struct fuse_write_out *fwo; 3102 size_t data_len; 3103 size_t payload_len; 3104 size_t written; 3105 int inresize; 3106 int error; 3107 3108 ps = puffs_getspecific(pu); 3109 pnd = PERFUSE_NODE_DATA(opc); 3110 vap = puffs_pn_getvap((struct puffs_node *)opc); 3111 written = 0; 3112 inresize = 0; 3113 error = 0; 3114 3115 if (vap->va_type == VDIR) 3116 return EISDIR; 3117 3118 node_ref(opc); 3119 3120 /* 3121 * We need to queue write requests in order to avoid 3122 * dequeueing PCQ_AFTERWRITE when there are pending writes. 3123 */ 3124 while (pnd->pnd_flags & PND_INWRITE) 3125 requeue_request(pu, opc, PCQ_WRITE); 3126 pnd->pnd_flags |= PND_INWRITE; 3127 3128 /* 3129 * Serialize size access, see comment in perfuse_node_setattr(). 3130 */ 3131 if ((u_quad_t)offset + *resid > vap->va_size) { 3132 while (pnd->pnd_flags & PND_INRESIZE) 3133 requeue_request(pu, opc, PCQ_RESIZE); 3134 pnd->pnd_flags |= PND_INRESIZE; 3135 inresize = 1; 3136 } 3137 3138 /* 3139 * append flag: re-read the file size so that 3140 * we get the latest value. 3141 */ 3142 if (ioflag & PUFFS_IO_APPEND) { 3143 DWARNX("%s: PUFFS_IO_APPEND set, untested code", __func__); 3144 3145 if ((error = perfuse_node_getattr(pu, opc, vap, pcr)) != 0) 3146 goto out; 3147 3148 offset = vap->va_size; 3149 } 3150 3151 #ifdef PERFUSE_DEBUG 3152 if (perfuse_diagflags & PDF_RESIZE) 3153 DPRINTF(">> %s %p %" PRIu64 "\n", __func__, 3154 (void *)opc, vap->va_size); 3155 #endif 3156 3157 do { 3158 size_t max_write; 3159 /* 3160 * There is a writepage flag when data 3161 * is aligned to page size. Use it for 3162 * everything but the data after the last 3163 * page boundary. 3164 */ 3165 max_write = ps->ps_max_write - sizeof(*fwi); 3166 3167 data_len = MIN(*resid, max_write); 3168 if (data_len > (size_t)sysconf(_SC_PAGESIZE)) 3169 data_len = data_len & ~(sysconf(_SC_PAGESIZE) - 1); 3170 3171 payload_len = data_len + sizeof(*fwi); 3172 3173 /* 3174 * flags may be set to FUSE_WRITE_CACHE (XXX usage?) 3175 * or FUSE_WRITE_LOCKOWNER, if lock_owner is provided. 3176 * write_flags is set to 1 for writepage. 3177 */ 3178 pm = ps->ps_new_msg(pu, opc, FUSE_WRITE, payload_len, pcr); 3179 fwi = GET_INPAYLOAD(ps, pm, fuse_write_in); 3180 fwi->fh = perfuse_get_fh(opc, FWRITE); 3181 fwi->offset = offset; 3182 fwi->size = (uint32_t)data_len; 3183 fwi->write_flags = (fwi->size % sysconf(_SC_PAGESIZE)) ? 0 : 1; 3184 fwi->lock_owner = pnd->pnd_lock_owner; 3185 fwi->flags = 0; 3186 fwi->flags |= (fwi->lock_owner != 0) ? FUSE_WRITE_LOCKOWNER : 0; 3187 fwi->flags |= (ioflag & IO_DIRECT) ? 0 : FUSE_WRITE_CACHE; 3188 (void)memcpy((fwi + 1), buf, data_len); 3189 3190 3191 #ifdef PERFUSE_DEBUG 3192 if (perfuse_diagflags & PDF_FH) 3193 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", " 3194 "fh = 0x%"PRIx64"\n", __func__, 3195 (void *)opc, pnd->pnd_nodeid, fwi->fh); 3196 #endif 3197 if ((error = xchg_msg(pu, opc, pm, 3198 sizeof(*fwo), wait_reply)) != 0) 3199 goto out; 3200 3201 fwo = GET_OUTPAYLOAD(ps, pm, fuse_write_out); 3202 written = fwo->size; 3203 ps->ps_destroy_msg(pm); 3204 3205 #ifdef PERFUSE_DEBUG 3206 if (written > *resid) 3207 DERRX(EX_SOFTWARE, "%s: Unexpected big write %zd", 3208 __func__, written); 3209 #endif 3210 *resid -= written; 3211 offset += written; 3212 buf += written; 3213 3214 } while (*resid != 0); 3215 3216 /* 3217 * puffs_ops(3) says 3218 * "everything must be written or an error will be generated" 3219 */ 3220 if (*resid != 0) 3221 error = EFBIG; 3222 3223 #ifdef PERFUSE_DEBUG 3224 if (perfuse_diagflags & PDF_RESIZE) { 3225 if (offset > (off_t)vap->va_size) 3226 DPRINTF("<< %s %p %" PRIu64 " -> %lld\n", __func__, 3227 (void *)opc, vap->va_size, (long long)offset); 3228 else 3229 DPRINTF("<< %s %p \n", __func__, (void *)opc); 3230 } 3231 #endif 3232 3233 /* 3234 * Update file size if we wrote beyond the end 3235 */ 3236 if (offset > (off_t)vap->va_size) 3237 vap->va_size = offset; 3238 3239 if (inresize) { 3240 #ifdef PERFUSE_DEBUG 3241 if (!(pnd->pnd_flags & PND_INRESIZE)) 3242 DERRX(EX_SOFTWARE, "file write grow without resize"); 3243 #endif 3244 pnd->pnd_flags &= ~PND_INRESIZE; 3245 (void)dequeue_requests(opc, PCQ_RESIZE, DEQUEUE_ALL); 3246 } 3247 3248 3249 /* 3250 * Statistics 3251 */ 3252 if (ioflag & (IO_SYNC|IO_DSYNC)) 3253 ps->ps_syncwrites++; 3254 else 3255 ps->ps_asyncwrites++; 3256 3257 /* 3258 * Remember to sync the file 3259 */ 3260 pnd->pnd_flags |= PND_DIRTY; 3261 3262 #ifdef PERFUSE_DEBUG 3263 if (perfuse_diagflags & PDF_SYNC) 3264 DPRINTF("%s: DIRTY opc = %p, file = \"%s\"\n", 3265 __func__, (void*)opc, perfuse_node_path(ps, opc)); 3266 #endif 3267 3268 out: 3269 /* 3270 * VOP_PUTPAGE causes FAF write where kernel does not 3271 * check operation result. At least warn if it failed. 3272 */ 3273 #ifdef PUFFS_WRITE_FAF 3274 if (error && (xflag & PUFFS_WRITE_FAF)) 3275 DWARN("Data loss caused by FAF write failed on \"%s\"", 3276 pnd->pnd_name); 3277 #endif /* PUFFS_WRITE_FAF */ 3278 3279 /* 3280 * If there are no more queued write, we can resume 3281 * an operation awaiting write completion. 3282 */ 3283 pnd->pnd_flags &= ~PND_INWRITE; 3284 if (dequeue_requests(opc, PCQ_WRITE, 1) == 0) 3285 (void)dequeue_requests(opc, PCQ_AFTERWRITE, DEQUEUE_ALL); 3286 3287 node_rele(opc); 3288 return error; 3289 } 3290 3291 /* ARGSUSED0 */ 3292 void 3293 perfuse_cache_write(struct puffs_usermount *pu, puffs_cookie_t opc, size_t size, 3294 struct puffs_cacherun *runs) 3295 { 3296 return; 3297 } 3298 3299 /* ARGSUSED4 */ 3300 int 3301 perfuse_node_getextattr(struct puffs_usermount *pu, puffs_cookie_t opc, 3302 int attrns, const char *attrname, size_t *attrsize, uint8_t *attr, 3303 size_t *resid, const struct puffs_cred *pcr) 3304 { 3305 struct perfuse_state *ps; 3306 char fuse_attrname[LINUX_XATTR_NAME_MAX + 1]; 3307 perfuse_msg_t *pm; 3308 struct fuse_getxattr_in *fgi; 3309 struct fuse_getxattr_out *fgo; 3310 struct fuse_out_header *foh; 3311 size_t attrnamelen; 3312 size_t len; 3313 char *np; 3314 int error; 3315 3316 node_ref(opc); 3317 ps = puffs_getspecific(pu); 3318 attrname = perfuse_native_ns(attrns, attrname, fuse_attrname); 3319 attrnamelen = strlen(attrname) + 1; 3320 len = sizeof(*fgi) + attrnamelen; 3321 3322 pm = ps->ps_new_msg(pu, opc, FUSE_GETXATTR, len, pcr); 3323 fgi = GET_INPAYLOAD(ps, pm, fuse_getxattr_in); 3324 fgi->size = (unsigned int)((resid != NULL) ? *resid : 0); 3325 np = (char *)(void *)(fgi + 1); 3326 (void)strlcpy(np, attrname, attrnamelen); 3327 3328 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 3329 goto out; 3330 3331 /* 3332 * We just get fuse_getattr_out with list size if we requested 3333 * a null size. 3334 */ 3335 if (resid == NULL) { 3336 fgo = GET_OUTPAYLOAD(ps, pm, fuse_getxattr_out); 3337 3338 if (attrsize != NULL) 3339 *attrsize = fgo->size; 3340 3341 ps->ps_destroy_msg(pm); 3342 error = 0; 3343 goto out; 3344 } 3345 3346 /* 3347 * And with a non null requested size, we get the list just 3348 * after the header 3349 */ 3350 foh = GET_OUTHDR(ps, pm); 3351 np = (char *)(void *)(foh + 1); 3352 3353 if (resid != NULL) { 3354 len = MAX(foh->len - sizeof(*foh), *resid); 3355 (void)memcpy(attr, np, len); 3356 *resid -= len; 3357 } 3358 3359 ps->ps_destroy_msg(pm); 3360 error = 0; 3361 3362 out: 3363 node_rele(opc); 3364 return error; 3365 } 3366 3367 int 3368 perfuse_node_setextattr(struct puffs_usermount *pu, puffs_cookie_t opc, 3369 int attrns, const char *attrname, uint8_t *attr, size_t *resid, 3370 const struct puffs_cred *pcr) 3371 { 3372 struct perfuse_state *ps; 3373 char fuse_attrname[LINUX_XATTR_NAME_MAX + 1]; 3374 perfuse_msg_t *pm; 3375 struct fuse_setxattr_in *fsi; 3376 size_t attrnamelen; 3377 size_t len; 3378 char *np; 3379 int error; 3380 3381 node_ref(opc); 3382 ps = puffs_getspecific(pu); 3383 attrname = perfuse_native_ns(attrns, attrname, fuse_attrname); 3384 attrnamelen = strlen(attrname) + 1; 3385 len = sizeof(*fsi) + attrnamelen + *resid; 3386 3387 pm = ps->ps_new_msg(pu, opc, FUSE_SETXATTR, len, pcr); 3388 fsi = GET_INPAYLOAD(ps, pm, fuse_setxattr_in); 3389 fsi->size = (unsigned int)*resid; 3390 fsi->flags = 0; 3391 np = (char *)(void *)(fsi + 1); 3392 (void)strlcpy(np, attrname, attrnamelen); 3393 np += attrnamelen; 3394 (void)memcpy(np, (char *)attr, *resid); 3395 3396 if ((error = xchg_msg(pu, opc, pm, 3397 NO_PAYLOAD_REPLY_LEN, wait_reply)) != 0) 3398 goto out; 3399 3400 ps->ps_destroy_msg(pm); 3401 *resid = 0; 3402 error = 0; 3403 3404 out: 3405 node_rele(opc); 3406 return error; 3407 } 3408 3409 /* ARGSUSED2 */ 3410 int 3411 perfuse_node_listextattr(struct puffs_usermount *pu, puffs_cookie_t opc, 3412 int attrns, size_t *attrsize, uint8_t *attrs, size_t *resid, int flag, 3413 const struct puffs_cred *pcr) 3414 { 3415 struct perfuse_state *ps; 3416 perfuse_msg_t *pm; 3417 struct fuse_getxattr_in *fgi; 3418 struct fuse_getxattr_out *fgo; 3419 struct fuse_out_header *foh; 3420 char *np; 3421 size_t len, puffs_len; 3422 int error; 3423 3424 node_ref(opc); 3425 3426 ps = puffs_getspecific(pu); 3427 len = sizeof(*fgi); 3428 3429 pm = ps->ps_new_msg(pu, opc, FUSE_LISTXATTR, len, pcr); 3430 fgi = GET_INPAYLOAD(ps, pm, fuse_getxattr_in); 3431 if (resid != NULL) 3432 fgi->size = (unsigned int)*resid; 3433 else 3434 fgi->size = 0; 3435 3436 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 3437 goto out; 3438 3439 /* 3440 * We just get fuse_getattr_out with list size if we requested 3441 * a null size. 3442 */ 3443 if (resid == NULL) { 3444 fgo = GET_OUTPAYLOAD(ps, pm, fuse_getxattr_out); 3445 3446 if (attrsize != NULL) 3447 *attrsize = fgo->size; 3448 3449 ps->ps_destroy_msg(pm); 3450 3451 error = 0; 3452 goto out; 3453 } 3454 3455 /* 3456 * And with a non null requested size, we get the list just 3457 * after the header 3458 */ 3459 foh = GET_OUTHDR(ps, pm); 3460 np = (char *)(void *)(foh + 1); 3461 puffs_len = foh->len - sizeof(*foh); 3462 3463 if (attrs != NULL) { 3464 #ifdef PUFFS_EXTATTR_LIST_LENPREFIX 3465 /* 3466 * Convert the FUSE reply to length prefixed strings 3467 * if this is what the kernel wants. 3468 */ 3469 if (flag & PUFFS_EXTATTR_LIST_LENPREFIX) { 3470 size_t i, attrlen; 3471 3472 for (i = 0; i < puffs_len; i += attrlen + 1) { 3473 attrlen = strlen(np + i); 3474 (void)memmove(np + i + 1, np + i, attrlen); 3475 *(np + i) = (uint8_t)attrlen; 3476 } 3477 } 3478 #endif /* PUFFS_EXTATTR_LIST_LENPREFIX */ 3479 (void)memcpy(attrs, np, puffs_len); 3480 *resid -= puffs_len; 3481 } 3482 3483 if (attrsize != NULL) 3484 *attrsize = puffs_len; 3485 3486 ps->ps_destroy_msg(pm); 3487 error = 0; 3488 3489 out: 3490 node_rele(opc); 3491 return error; 3492 } 3493 3494 int 3495 perfuse_node_deleteextattr(struct puffs_usermount *pu, puffs_cookie_t opc, 3496 int attrns, const char *attrname, const struct puffs_cred *pcr) 3497 { 3498 struct perfuse_state *ps; 3499 char fuse_attrname[LINUX_XATTR_NAME_MAX + 1]; 3500 perfuse_msg_t *pm; 3501 size_t attrnamelen; 3502 char *np; 3503 int error; 3504 3505 node_ref(opc); 3506 3507 ps = puffs_getspecific(pu); 3508 attrname = perfuse_native_ns(attrns, attrname, fuse_attrname); 3509 attrnamelen = strlen(attrname) + 1; 3510 3511 pm = ps->ps_new_msg(pu, opc, FUSE_REMOVEXATTR, attrnamelen, pcr); 3512 np = _GET_INPAYLOAD(ps, pm, char *); 3513 (void)strlcpy(np, attrname, attrnamelen); 3514 3515 error = xchg_msg(pu, opc, pm, NO_PAYLOAD_REPLY_LEN, wait_reply); 3516 3517 ps->ps_destroy_msg(pm); 3518 3519 node_rele(opc); 3520 return error; 3521 } 3522