ops.c revision 1.50.2.6
1 /* $NetBSD: ops.c,v 1.50.2.6 2012/08/12 13:13:20 martin 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 * Check for a known node, not reclaimed, with another name. 438 * It may have been moved, or we can lookup ../ 439 */ 440 if (((oldpnd = perfuse_node_bynodeid(ps, feo->nodeid)) != NULL) && 441 !(oldpnd->pnd_flags & PND_RECLAIMED)) { 442 /* 443 * Save the new node name if not .. 444 */ 445 if (strncmp(path, "..", len) != 0) 446 (void)strlcpy(oldpnd->pnd_name, 447 path, MAXPATHLEN); 448 pn = oldpnd->pnd_pn; 449 450 } else { 451 pn = perfuse_new_pn(pu, path, opc); 452 PERFUSE_NODE_DATA(pn)->pnd_nodeid = feo->nodeid; 453 perfuse_node_cache(ps, pn); 454 } 455 456 #ifdef PERFUSE_DEBUG 457 if (PERFUSE_NODE_DATA(pn)->pnd_flags & PND_RECLAIMED) 458 DERRX(EX_SOFTWARE, 459 "reclaimed in lookup opc = %p, name = \"%s\", ck = %p", 460 opc, path, pn); 461 462 if (PERFUSE_NODE_DATA(pn)->pnd_flags & PND_INVALID) 463 DERRX(EX_SOFTWARE, 464 "freed in lookup opc = %p, name = \"%s\", ck = %p", 465 opc, path, pn); 466 #endif /* PERFUSE_DEBUG */ 467 468 fuse_attr_to_vap(ps, &pn->pn_va, &feo->attr); 469 pn->pn_va.va_gen = (u_long)(feo->generation); 470 PERFUSE_NODE_DATA(pn)->pnd_fuse_nlookup++; 471 472 *pnp = pn; 473 474 #ifdef PERFUSE_DEBUG 475 if (perfuse_diagflags & PDF_FILENAME) 476 DPRINTF("%s: opc = %p, looked up opc = %p, " 477 "nodeid = 0x%"PRIx64" file = \"%s\"\n", __func__, 478 (void *)opc, pn, feo->nodeid, path); 479 #endif 480 481 if (pni != NULL) { 482 #ifdef PUFFS_KFLAG_CACHE_FS_TTL 483 puffs_newinfo_setva(pni, &pn->pn_va); 484 perfuse_newinfo_setttl(pni, pn, feo, NULL); 485 #endif /* PUFFS_KFLAG_CACHE_FS_TTL */ 486 puffs_newinfo_setcookie(pni, pn); 487 puffs_newinfo_setvtype(pni, pn->pn_va.va_type); 488 puffs_newinfo_setsize(pni, (voff_t)pn->pn_va.va_size); 489 puffs_newinfo_setrdev(pni, pn->pn_va.va_rdev); 490 } 491 492 if (PERFUSE_NODE_DATA(pn)->pnd_flags & PND_NODELEAK) { 493 PERFUSE_NODE_DATA(pn)->pnd_flags &= ~PND_NODELEAK; 494 ps->ps_nodeleakcount--; 495 } 496 497 ps->ps_destroy_msg(pm); 498 499 return 0; 500 } 501 502 503 /* 504 * Common code for methods that create objects: 505 * perfuse_node_mkdir 506 * perfuse_node_mknod 507 * perfuse_node_symlink 508 */ 509 static int 510 node_mk_common(struct puffs_usermount *pu, puffs_cookie_t opc, 511 struct puffs_newinfo *pni, const struct puffs_cn *pcn, 512 perfuse_msg_t *pm) 513 { 514 struct perfuse_state *ps; 515 struct puffs_node *pn; 516 struct fuse_entry_out *feo; 517 int error; 518 519 ps = puffs_getspecific(pu); 520 521 if ((error = xchg_msg(pu, opc, pm, sizeof(*feo), wait_reply)) != 0) 522 return error; 523 524 feo = GET_OUTPAYLOAD(ps, pm, fuse_entry_out); 525 if (feo->nodeid == PERFUSE_UNKNOWN_NODEID) 526 DERRX(EX_SOFTWARE, "%s: no nodeid", __func__); 527 528 pn = perfuse_new_pn(pu, pcn->pcn_name, opc); 529 PERFUSE_NODE_DATA(pn)->pnd_nodeid = feo->nodeid; 530 PERFUSE_NODE_DATA(pn)->pnd_puffs_nlookup++; 531 perfuse_node_cache(ps, pn); 532 533 fuse_attr_to_vap(ps, &pn->pn_va, &feo->attr); 534 pn->pn_va.va_gen = (u_long)(feo->generation); 535 536 puffs_newinfo_setcookie(pni, pn); 537 #ifdef PUFFS_KFLAG_CACHE_FS_TTL 538 puffs_newinfo_setva(pni, &pn->pn_va); 539 perfuse_newinfo_setttl(pni, pn, feo, NULL); 540 #endif /* PUFFS_KFLAG_CACHE_FS_TTL */ 541 542 543 #ifdef PERFUSE_DEBUG 544 if (perfuse_diagflags & PDF_FILENAME) 545 DPRINTF("%s: opc = %p, file = \"%s\", flags = 0x%x " 546 "nodeid = 0x%"PRIx64"\n", 547 __func__, (void *)pn, pcn->pcn_name, 548 PERFUSE_NODE_DATA(pn)->pnd_flags, feo->nodeid); 549 #endif 550 ps->ps_destroy_msg(pm); 551 552 /* Parents is now dirty */ 553 PERFUSE_NODE_DATA(opc)->pnd_flags |= PND_DIRTY; 554 555 return 0; 556 } 557 558 static uint64_t 559 readdir_last_cookie(struct fuse_dirent *fd, size_t fd_len) 560 { 561 size_t len; 562 size_t seen = 0; 563 char *ndp; 564 565 do { 566 len = FUSE_DIRENT_ALIGN(sizeof(*fd) + fd->namelen); 567 seen += len; 568 569 if (seen >= fd_len) 570 break; 571 572 ndp = (char *)(void *)fd + (size_t)len; 573 fd = (struct fuse_dirent *)(void *)ndp; 574 } while (1 /* CONSTCOND */); 575 576 return fd->off; 577 } 578 579 static ssize_t 580 fuse_to_dirent(struct puffs_usermount *pu, puffs_cookie_t opc, 581 struct fuse_dirent *fd, size_t fd_len) 582 { 583 struct dirent *dents; 584 size_t dents_len; 585 ssize_t written; 586 uint64_t fd_offset; 587 struct fuse_dirent *fd_base; 588 size_t len; 589 590 fd_base = fd; 591 fd_offset = 0; 592 written = 0; 593 dents = PERFUSE_NODE_DATA(opc)->pnd_dirent; 594 dents_len = (size_t)PERFUSE_NODE_DATA(opc)->pnd_dirent_len; 595 596 do { 597 char *ndp; 598 size_t reclen; 599 600 reclen = _DIRENT_RECLEN(dents, fd->namelen); 601 602 /* 603 * Check we do not overflow the output buffer 604 * struct fuse_dirent is bigger than struct dirent, 605 * so we should always use fd_len and never reallocate 606 * later. 607 * If we have to reallocate,try to double the buffer 608 * each time so that we do not have to do it too often. 609 */ 610 if (written + reclen > dents_len) { 611 if (dents_len == 0) 612 dents_len = fd_len; 613 else 614 dents_len = 615 MAX(2 * dents_len, written + reclen); 616 617 dents = PERFUSE_NODE_DATA(opc)->pnd_dirent; 618 if ((dents = realloc(dents, dents_len)) == NULL) 619 DERR(EX_OSERR, "%s: malloc failed", __func__); 620 621 PERFUSE_NODE_DATA(opc)->pnd_dirent = dents; 622 PERFUSE_NODE_DATA(opc)->pnd_dirent_len = dents_len; 623 624 /* 625 * (void *) for delint 626 */ 627 ndp = (char *)(void *)dents + written; 628 dents = (struct dirent *)(void *)ndp; 629 } 630 631 /* 632 * Filesystem was mounted without -o use_ino 633 * Perform a lookup to find it. 634 */ 635 if (fd->ino == PERFUSE_UNKNOWN_INO) { 636 struct puffs_node *pn; 637 638 if (node_lookup_common(pu, opc, NULL, fd->name, 639 NULL, &pn) != 0) { 640 DWARNX("node_lookup_common failed"); 641 } else { 642 fd->ino = pn->pn_va.va_fileid; 643 (void)perfuse_node_reclaim(pu, pn); 644 } 645 } 646 647 dents->d_fileno = fd->ino; 648 dents->d_reclen = (unsigned short)reclen; 649 dents->d_namlen = fd->namelen; 650 dents->d_type = fd->type; 651 strlcpy(dents->d_name, fd->name, fd->namelen + 1); 652 653 #ifdef PERFUSE_DEBUG 654 if (perfuse_diagflags & PDF_READDIR) 655 DPRINTF("%s: translated \"%s\" ino = %"PRIu64"\n", 656 __func__, dents->d_name, dents->d_fileno); 657 #endif 658 659 dents = _DIRENT_NEXT(dents); 660 written += reclen; 661 662 /* 663 * Move to the next record. 664 * fd->off is not the offset, it is an opaque cookie 665 * given by the filesystem to keep state across multiple 666 * readdir() operation. 667 * Use record alignement instead. 668 */ 669 len = FUSE_DIRENT_ALIGN(sizeof(*fd) + fd->namelen); 670 #ifdef PERFUSE_DEBUG 671 if (perfuse_diagflags & PDF_READDIR) 672 DPRINTF("%s: record at %"PRId64"/0x%"PRIx64" " 673 "length = %zd/0x%zx. " 674 "next record at %"PRId64"/0x%"PRIx64" " 675 "max %zd/0x%zx\n", 676 __func__, fd_offset, fd_offset, len, len, 677 fd_offset + len, fd_offset + len, 678 fd_len, fd_len); 679 #endif 680 fd_offset += len; 681 682 /* 683 * Check if next record is still within the packet 684 * If it is not, we reached the end of the buffer. 685 */ 686 if (fd_offset >= fd_len) 687 break; 688 689 /* 690 * (void *) for delint 691 */ 692 ndp = (char *)(void *)fd_base + (size_t)fd_offset; 693 fd = (struct fuse_dirent *)(void *)ndp; 694 695 } while (1 /* CONSTCOND */); 696 697 /* 698 * Adjust the dirent output length 699 */ 700 if (written != -1) 701 PERFUSE_NODE_DATA(opc)->pnd_dirent_len = written; 702 703 return written; 704 } 705 706 static void 707 readdir_buffered(puffs_cookie_t opc, struct dirent *dent, off_t *readoff, 708 size_t *reslen) 709 { 710 struct dirent *fromdent; 711 struct perfuse_node_data *pnd; 712 char *ndp; 713 714 pnd = PERFUSE_NODE_DATA(opc); 715 716 while (*readoff < pnd->pnd_dirent_len) { 717 /* 718 * (void *) for delint 719 */ 720 ndp = (char *)(void *)pnd->pnd_dirent + (size_t)*readoff; 721 fromdent = (struct dirent *)(void *)ndp; 722 723 if (*reslen < _DIRENT_SIZE(fromdent)) 724 break; 725 726 memcpy(dent, fromdent, _DIRENT_SIZE(fromdent)); 727 *readoff += _DIRENT_SIZE(fromdent); 728 *reslen -= _DIRENT_SIZE(fromdent); 729 730 dent = _DIRENT_NEXT(dent); 731 } 732 733 #ifdef PERFUSE_DEBUG 734 if (perfuse_diagflags & PDF_READDIR) 735 DPRINTF("%s: readoff = %"PRId64", " 736 "pnd->pnd_dirent_len = %"PRId64"\n", 737 __func__, *readoff, pnd->pnd_dirent_len); 738 #endif 739 if (*readoff >= pnd->pnd_dirent_len) { 740 free(pnd->pnd_dirent); 741 pnd->pnd_dirent = NULL; 742 pnd->pnd_dirent_len = 0; 743 } 744 745 return; 746 } 747 748 749 static void 750 node_ref(puffs_cookie_t opc) 751 { 752 struct perfuse_node_data *pnd = PERFUSE_NODE_DATA(opc); 753 754 #ifdef PERFUSE_DEBUG 755 if (pnd->pnd_flags & PND_INVALID) 756 DERRX(EX_SOFTWARE, "Use of freed node opc = %p", opc); 757 #endif /* PERFUSE_DEBUG */ 758 759 pnd->pnd_ref++; 760 return; 761 } 762 763 static void 764 node_rele(puffs_cookie_t opc) 765 { 766 struct perfuse_node_data *pnd = PERFUSE_NODE_DATA(opc); 767 768 #ifdef PERFUSE_DEBUG 769 if (pnd->pnd_flags & PND_INVALID) 770 DERRX(EX_SOFTWARE, "Use of freed node opc = %p", opc); 771 #endif /* PERFUSE_DEBUG */ 772 773 pnd->pnd_ref--; 774 775 if (pnd->pnd_ref == 0) 776 (void)dequeue_requests(opc, PCQ_REF, DEQUEUE_ALL); 777 778 return; 779 } 780 781 static void 782 requeue_request(struct puffs_usermount *pu, puffs_cookie_t opc, 783 enum perfuse_qtype type) 784 { 785 struct perfuse_cc_queue pcq; 786 struct perfuse_node_data *pnd; 787 #ifdef PERFUSE_DEBUG 788 struct perfuse_state *ps; 789 790 ps = perfuse_getspecific(pu); 791 #endif 792 793 pnd = PERFUSE_NODE_DATA(opc); 794 pcq.pcq_type = type; 795 pcq.pcq_cc = puffs_cc_getcc(pu); 796 TAILQ_INSERT_TAIL(&pnd->pnd_pcq, &pcq, pcq_next); 797 798 #ifdef PERFUSE_DEBUG 799 if (perfuse_diagflags & PDF_REQUEUE) 800 DPRINTF("%s: REQUEUE opc = %p, pcc = %p (%s)\n", 801 __func__, (void *)opc, pcq.pcq_cc, 802 perfuse_qtypestr[type]); 803 #endif 804 805 puffs_cc_yield(pcq.pcq_cc); 806 TAILQ_REMOVE(&pnd->pnd_pcq, &pcq, pcq_next); 807 808 #ifdef PERFUSE_DEBUG 809 if (perfuse_diagflags & PDF_REQUEUE) 810 DPRINTF("%s: RESUME opc = %p, pcc = %p (%s)\n", 811 __func__, (void *)opc, pcq.pcq_cc, 812 perfuse_qtypestr[type]); 813 #endif 814 815 return; 816 } 817 818 static int 819 dequeue_requests(puffs_cookie_t opc, enum perfuse_qtype type, int max) 820 { 821 struct perfuse_cc_queue *pcq; 822 struct perfuse_node_data *pnd; 823 int dequeued; 824 825 pnd = PERFUSE_NODE_DATA(opc); 826 dequeued = 0; 827 TAILQ_FOREACH(pcq, &pnd->pnd_pcq, pcq_next) { 828 if (pcq->pcq_type != type) 829 continue; 830 831 #ifdef PERFUSE_DEBUG 832 if (perfuse_diagflags & PDF_REQUEUE) 833 DPRINTF("%s: SCHEDULE opc = %p, pcc = %p (%s)\n", 834 __func__, (void *)opc, pcq->pcq_cc, 835 perfuse_qtypestr[type]); 836 #endif 837 puffs_cc_schedule(pcq->pcq_cc); 838 839 if (++dequeued == max) 840 break; 841 } 842 843 #ifdef PERFUSE_DEBUG 844 if (perfuse_diagflags & PDF_REQUEUE) 845 DPRINTF("%s: DONE opc = %p\n", __func__, (void *)opc); 846 #endif 847 848 return dequeued; 849 } 850 851 void 852 perfuse_fs_init(struct puffs_usermount *pu) 853 { 854 struct perfuse_state *ps; 855 perfuse_msg_t *pm; 856 struct fuse_init_in *fii; 857 struct fuse_init_out *fio; 858 int error; 859 860 ps = puffs_getspecific(pu); 861 862 if (puffs_mount(pu, ps->ps_target, ps->ps_mountflags, ps->ps_root) != 0) 863 DERR(EX_OSERR, "%s: puffs_mount failed", __func__); 864 865 /* 866 * Linux 2.6.34.1 sends theses flags: 867 * FUSE_ASYNC_READ | FUSE_POSIX_LOCKS | FUSE_ATOMIC_O_TRUNC 868 * FUSE_EXPORT_SUPPORT | FUSE_BIG_WRITES | FUSE_DONT_MASK 869 * 870 * Linux also sets max_readahead at 32 pages (128 kB) 871 * 872 * ps_new_msg() is called with NULL creds, which will 873 * be interpreted as FUSE superuser. 874 */ 875 pm = ps->ps_new_msg(pu, 0, FUSE_INIT, sizeof(*fii), NULL); 876 fii = GET_INPAYLOAD(ps, pm, fuse_init_in); 877 fii->major = FUSE_KERNEL_VERSION; 878 fii->minor = FUSE_KERNEL_MINOR_VERSION; 879 fii->max_readahead = (unsigned int)(32 * sysconf(_SC_PAGESIZE)); 880 fii->flags = (FUSE_ASYNC_READ|FUSE_POSIX_LOCKS|FUSE_ATOMIC_O_TRUNC); 881 882 if ((error = xchg_msg(pu, 0, pm, sizeof(*fio), wait_reply)) != 0) 883 DERRX(EX_SOFTWARE, "init message exchange failed (%d)", error); 884 885 fio = GET_OUTPAYLOAD(ps, pm, fuse_init_out); 886 ps->ps_max_readahead = fio->max_readahead; 887 ps->ps_max_write = fio->max_write; 888 889 ps->ps_destroy_msg(pm); 890 891 return; 892 } 893 894 int 895 perfuse_fs_unmount(struct puffs_usermount *pu, int flags) 896 { 897 perfuse_msg_t *pm; 898 struct perfuse_state *ps; 899 puffs_cookie_t opc; 900 int error; 901 902 ps = puffs_getspecific(pu); 903 opc = (puffs_cookie_t)puffs_getroot(pu); 904 905 /* 906 * ps_new_msg() is called with NULL creds, which will 907 * be interpreted as FUSE superuser. 908 */ 909 pm = ps->ps_new_msg(pu, opc, FUSE_DESTROY, 0, NULL); 910 911 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0){ 912 DWARN("unmount %s", ps->ps_target); 913 if (!(flags & MNT_FORCE)) 914 return error; 915 else 916 error = 0; 917 } else { 918 ps->ps_destroy_msg(pm); 919 } 920 921 ps->ps_umount(pu); 922 923 if (perfuse_diagflags & PDF_MISC) 924 DPRINTF("%s unmounted, exit\n", ps->ps_target); 925 926 return 0; 927 } 928 929 int 930 perfuse_fs_statvfs(struct puffs_usermount *pu, struct statvfs *svfsb) 931 { 932 struct perfuse_state *ps; 933 perfuse_msg_t *pm; 934 puffs_cookie_t opc; 935 struct fuse_statfs_out *fso; 936 int error; 937 938 ps = puffs_getspecific(pu); 939 opc = (puffs_cookie_t)puffs_getroot(pu); 940 941 /* 942 * ps_new_msg() is called with NULL creds, which will 943 * be interpreted as FUSE superuser. 944 */ 945 pm = ps->ps_new_msg(pu, opc, FUSE_STATFS, 0, NULL); 946 947 if ((error = xchg_msg(pu, opc, pm, sizeof(*fso), wait_reply)) != 0) 948 return error; 949 950 fso = GET_OUTPAYLOAD(ps, pm, fuse_statfs_out); 951 svfsb->f_flag = ps->ps_mountflags; 952 svfsb->f_bsize = fso->st.bsize; 953 svfsb->f_frsize = fso->st.frsize; 954 svfsb->f_iosize = ((struct puffs_node *)opc)->pn_va.va_blocksize; 955 svfsb->f_blocks = fso->st.blocks; 956 svfsb->f_bfree = fso->st.bfree; 957 svfsb->f_bavail = fso->st.bavail; 958 svfsb->f_bresvd = fso->st.bfree - fso->st.bavail; 959 svfsb->f_files = fso->st.files; 960 svfsb->f_ffree = fso->st.ffree; 961 svfsb->f_favail = fso->st.ffree;/* files not reserved for root */ 962 svfsb->f_fresvd = 0; /* files reserved for root */ 963 964 svfsb->f_syncreads = ps->ps_syncreads; 965 svfsb->f_syncwrites = ps->ps_syncwrites; 966 967 svfsb->f_asyncreads = ps->ps_asyncreads; 968 svfsb->f_asyncwrites = ps->ps_asyncwrites; 969 970 (void)memcpy(&svfsb->f_fsidx, &ps->ps_fsid, sizeof(ps->ps_fsid)); 971 svfsb->f_fsid = (unsigned long)ps->ps_fsid; 972 svfsb->f_namemax = MAXPATHLEN; /* XXX */ 973 svfsb->f_owner = ps->ps_owner_uid; 974 975 (void)strlcpy(svfsb->f_mntonname, ps->ps_target, _VFS_NAMELEN); 976 977 if (ps->ps_filesystemtype != NULL) 978 (void)strlcpy(svfsb->f_fstypename, 979 ps->ps_filesystemtype, _VFS_NAMELEN); 980 else 981 (void)strlcpy(svfsb->f_fstypename, "fuse", _VFS_NAMELEN); 982 983 if (ps->ps_source != NULL) 984 strlcpy(svfsb->f_mntfromname, ps->ps_source, _VFS_NAMELEN); 985 else 986 strlcpy(svfsb->f_mntfromname, _PATH_FUSE, _VFS_NAMELEN); 987 988 ps->ps_destroy_msg(pm); 989 990 return 0; 991 } 992 993 int 994 perfuse_fs_sync(struct puffs_usermount *pu, int waitfor, 995 const struct puffs_cred *pcr) 996 { 997 /* 998 * FUSE does not seem to have a FS sync callback. 999 * Maybe do not even register this callback 1000 */ 1001 return puffs_fsnop_sync(pu, waitfor, pcr); 1002 } 1003 1004 /* ARGSUSED0 */ 1005 int 1006 perfuse_fs_fhtonode(struct puffs_usermount *pu, void *fid, size_t fidsize, 1007 struct puffs_newinfo *pni) 1008 { 1009 DERRX(EX_SOFTWARE, "%s: UNIMPLEMENTED (FATAL)", __func__); 1010 return 0; 1011 } 1012 1013 /* ARGSUSED0 */ 1014 int 1015 perfuse_fs_nodetofh(struct puffs_usermount *pu, puffs_cookie_t cookie, 1016 void *fid, size_t *fidsize) 1017 { 1018 DERRX(EX_SOFTWARE, "%s: UNIMPLEMENTED (FATAL)", __func__); 1019 return 0; 1020 } 1021 1022 #if 0 1023 /* ARGSUSED0 */ 1024 void 1025 perfuse_fs_extattrctl(struct puffs_usermount *pu, int cmd, 1026 puffs_cookie_t *cookie, int flags, int namespace, const char *attrname) 1027 { 1028 DERRX(EX_SOFTWARE, "%s: UNIMPLEMENTED (FATAL)", __func__); 1029 return 0; 1030 } 1031 #endif /* 0 */ 1032 1033 /* ARGSUSED0 */ 1034 void 1035 perfuse_fs_suspend(struct puffs_usermount *pu, int status) 1036 { 1037 return; 1038 } 1039 1040 1041 int 1042 perfuse_node_lookup(struct puffs_usermount *pu, puffs_cookie_t opc, 1043 struct puffs_newinfo *pni, const struct puffs_cn *pcn) 1044 { 1045 struct perfuse_state *ps; 1046 struct puffs_node *pn; 1047 mode_t mode; 1048 int error; 1049 1050 ps = puffs_getspecific(pu); 1051 node_ref(opc); 1052 1053 /* 1054 * Check permissions 1055 */ 1056 switch(pcn->pcn_nameiop) { 1057 case NAMEI_DELETE: /* FALLTHROUGH */ 1058 case NAMEI_RENAME: /* FALLTHROUGH */ 1059 case NAMEI_CREATE: 1060 if (pcn->pcn_flags & NAMEI_ISLASTCN) 1061 mode = PUFFS_VEXEC|PUFFS_VWRITE; 1062 else 1063 mode = PUFFS_VEXEC; 1064 break; 1065 case NAMEI_LOOKUP: /* FALLTHROUGH */ 1066 default: 1067 mode = PUFFS_VEXEC; 1068 break; 1069 } 1070 1071 if ((error = mode_access(opc, pcn->pcn_cred, mode)) != 0) 1072 goto out; 1073 1074 error = node_lookup_common(pu, (puffs_cookie_t)opc, pni, 1075 pcn->pcn_name, pcn->pcn_cred, &pn); 1076 1077 if (error != 0) 1078 goto out; 1079 1080 /* 1081 * Kernel would kill us if the filesystem returned the parent 1082 * itself. If we want to live, hide that! 1083 */ 1084 if ((opc == (puffs_cookie_t)pn) && (strcmp(pcn->pcn_name, ".") != 0)) { 1085 DERRX(EX_SOFTWARE, "lookup \"%s\" in \"%s\" returned parent", 1086 pcn->pcn_name, perfuse_node_path(ps, opc)); 1087 /* NOTREACHED */ 1088 error = ESTALE; 1089 goto out; 1090 } 1091 1092 /* 1093 * Removed node 1094 */ 1095 if (PERFUSE_NODE_DATA(pn)->pnd_flags & PND_REMOVED) { 1096 error = ENOENT; 1097 goto out; 1098 } 1099 1100 /* 1101 * Check for sticky bit. Unfortunately there is no way to 1102 * do this before creating the puffs_node, since we require 1103 * this operation to get the node owner. 1104 */ 1105 switch (pcn->pcn_nameiop) { 1106 case NAMEI_DELETE: /* FALLTHROUGH */ 1107 case NAMEI_RENAME: 1108 error = sticky_access(opc, pn, pcn->pcn_cred); 1109 if (error != 0) { 1110 (void)perfuse_node_reclaim(pu, pn); 1111 goto out; 1112 } 1113 break; 1114 default: 1115 break; 1116 } 1117 1118 PERFUSE_NODE_DATA(pn)->pnd_puffs_nlookup++; 1119 1120 error = 0; 1121 1122 out: 1123 node_rele(opc); 1124 return error; 1125 } 1126 1127 int 1128 perfuse_node_create(struct puffs_usermount *pu, puffs_cookie_t opc, 1129 struct puffs_newinfo *pni, const struct puffs_cn *pcn, 1130 const struct vattr *vap) 1131 { 1132 perfuse_msg_t *pm; 1133 struct perfuse_state *ps; 1134 struct fuse_create_in *fci; 1135 struct fuse_entry_out *feo; 1136 struct fuse_open_out *foo; 1137 struct puffs_node *pn; 1138 const char *name; 1139 size_t namelen; 1140 size_t len; 1141 int error; 1142 1143 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 1144 return ENOENT; 1145 1146 node_ref(opc); 1147 1148 /* 1149 * If create is unimplemented: Check that it does not 1150 * already exists, and if not, do mknod and open 1151 */ 1152 ps = puffs_getspecific(pu); 1153 if (ps->ps_flags & PS_NO_CREAT) { 1154 error = node_lookup_common(pu, opc, NULL, pcn->pcn_name, 1155 pcn->pcn_cred, &pn); 1156 if (error == 0) { 1157 (void)perfuse_node_reclaim(pu, pn); 1158 error = EEXIST; 1159 goto out; 1160 } 1161 1162 error = perfuse_node_mknod(pu, opc, pni, pcn, vap); 1163 if (error != 0) 1164 goto out; 1165 1166 error = node_lookup_common(pu, opc, NULL, pcn->pcn_name, 1167 pcn->pcn_cred, &pn); 1168 if (error != 0) 1169 goto out; 1170 1171 /* 1172 * FUSE does the open at create time, while 1173 * NetBSD will open in a subsequent operation. 1174 * We need to open now, in order to retain FUSE 1175 * semantics. The calling process will not get 1176 * a file descriptor before the kernel sends 1177 * the open operation. 1178 */ 1179 error = perfuse_node_open(pu, (puffs_cookie_t)pn, 1180 FWRITE, pcn->pcn_cred); 1181 goto out; 1182 } 1183 1184 name = pcn->pcn_name; 1185 namelen = pcn->pcn_namelen + 1; 1186 len = sizeof(*fci) + namelen; 1187 1188 /* 1189 * flags should use O_WRONLY instead of O_RDWR, but it 1190 * breaks when the caller tries to read from file. 1191 * 1192 * mode must contain file type (ie: S_IFREG), use VTTOIF(vap->va_type) 1193 */ 1194 pm = ps->ps_new_msg(pu, opc, FUSE_CREATE, len, pcn->pcn_cred); 1195 fci = GET_INPAYLOAD(ps, pm, fuse_create_in); 1196 fci->flags = O_CREAT | O_TRUNC | O_RDWR; 1197 fci->mode = vap->va_mode | VTTOIF(vap->va_type); 1198 fci->umask = 0; /* Seems unused by libfuse */ 1199 (void)strlcpy((char*)(void *)(fci + 1), name, namelen); 1200 1201 len = sizeof(*feo) + sizeof(*foo); 1202 if ((error = xchg_msg(pu, opc, pm, len, wait_reply)) != 0) { 1203 /* 1204 * create is unimplmented, remember it for later, 1205 * and start over using mknod and open instead. 1206 */ 1207 if (error == ENOSYS) { 1208 ps->ps_flags |= PS_NO_CREAT; 1209 error = perfuse_node_create(pu, opc, pni, pcn, vap); 1210 } 1211 1212 goto out; 1213 } 1214 1215 feo = GET_OUTPAYLOAD(ps, pm, fuse_entry_out); 1216 foo = (struct fuse_open_out *)(void *)(feo + 1); 1217 if (feo->nodeid == PERFUSE_UNKNOWN_NODEID) 1218 DERRX(EX_SOFTWARE, "%s: no nodeid", __func__); 1219 1220 /* 1221 * Save the file handle and inode in node private data 1222 * so that we can reuse it later 1223 */ 1224 pn = perfuse_new_pn(pu, name, opc); 1225 perfuse_new_fh((puffs_cookie_t)pn, foo->fh, FWRITE); 1226 PERFUSE_NODE_DATA(pn)->pnd_nodeid = feo->nodeid; 1227 PERFUSE_NODE_DATA(pn)->pnd_puffs_nlookup++; 1228 perfuse_node_cache(ps, pn); 1229 1230 fuse_attr_to_vap(ps, &pn->pn_va, &feo->attr); 1231 pn->pn_va.va_gen = (u_long)(feo->generation); 1232 1233 puffs_newinfo_setcookie(pni, pn); 1234 #ifdef PUFFS_KFLAG_CACHE_FS_TTL 1235 puffs_newinfo_setva(pni, &pn->pn_va); 1236 perfuse_newinfo_setttl(pni, pn, feo, NULL); 1237 #endif /* PUFFS_KFLAG_CACHE_FS_TTL */ 1238 1239 #ifdef PERFUSE_DEBUG 1240 if (perfuse_diagflags & (PDF_FH|PDF_FILENAME)) 1241 DPRINTF("%s: opc = %p, file = \"%s\", flags = 0x%x " 1242 "nodeid = 0x%"PRIx64", wfh = 0x%"PRIx64"\n", 1243 __func__, (void *)pn, pcn->pcn_name, 1244 PERFUSE_NODE_DATA(pn)->pnd_flags, feo->nodeid, 1245 foo->fh); 1246 #endif 1247 1248 ps->ps_destroy_msg(pm); 1249 error = 0; 1250 1251 out: 1252 node_rele(opc); 1253 return error; 1254 } 1255 1256 1257 int 1258 perfuse_node_mknod(struct puffs_usermount *pu, puffs_cookie_t opc, 1259 struct puffs_newinfo *pni, const struct puffs_cn *pcn, 1260 const struct vattr *vap) 1261 { 1262 struct perfuse_state *ps; 1263 perfuse_msg_t *pm; 1264 struct fuse_mknod_in *fmi; 1265 const char* path; 1266 size_t len; 1267 int error; 1268 1269 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 1270 return ENOENT; 1271 1272 node_ref(opc); 1273 1274 /* 1275 * Only superuser can mknod objects other than 1276 * directories, files, socks, fifo and links. 1277 * 1278 * Create an object require -WX permission in the parent directory 1279 */ 1280 switch (vap->va_type) { 1281 case VDIR: /* FALLTHROUGH */ 1282 case VREG: /* FALLTHROUGH */ 1283 case VFIFO: /* FALLTHROUGH */ 1284 case VSOCK: 1285 break; 1286 default: /* VNON, VBLK, VCHR, VBAD */ 1287 if (!puffs_cred_isjuggernaut(pcn->pcn_cred)) { 1288 error = EACCES; 1289 goto out; 1290 } 1291 break; 1292 } 1293 1294 1295 ps = puffs_getspecific(pu); 1296 path = pcn->pcn_name; 1297 len = sizeof(*fmi) + pcn->pcn_namelen + 1; 1298 1299 /* 1300 * mode must contain file type (ie: S_IFREG), use VTTOIF(vap->va_type) 1301 */ 1302 pm = ps->ps_new_msg(pu, opc, FUSE_MKNOD, len, pcn->pcn_cred); 1303 fmi = GET_INPAYLOAD(ps, pm, fuse_mknod_in); 1304 fmi->mode = vap->va_mode | VTTOIF(vap->va_type); 1305 fmi->rdev = (uint32_t)vap->va_rdev; 1306 fmi->umask = 0; /* Seems unused bu libfuse */ 1307 (void)strlcpy((char *)(void *)(fmi + 1), path, len - sizeof(*fmi)); 1308 1309 error = node_mk_common(pu, opc, pni, pcn, pm); 1310 1311 out: 1312 node_rele(opc); 1313 return error; 1314 } 1315 1316 1317 int 1318 perfuse_node_open(struct puffs_usermount *pu, puffs_cookie_t opc, int mode, 1319 const struct puffs_cred *pcr) 1320 { 1321 struct perfuse_state *ps; 1322 struct perfuse_node_data *pnd; 1323 perfuse_msg_t *pm; 1324 mode_t fmode; 1325 int op; 1326 struct fuse_open_in *foi; 1327 struct fuse_open_out *foo; 1328 struct puffs_node *pn; 1329 int error; 1330 1331 ps = puffs_getspecific(pu); 1332 pn = (struct puffs_node *)opc; 1333 pnd = PERFUSE_NODE_DATA(opc); 1334 error = 0; 1335 1336 if (pnd->pnd_flags & PND_REMOVED) 1337 return ENOENT; 1338 1339 node_ref(opc); 1340 1341 if (puffs_pn_getvap(pn)->va_type == VDIR) 1342 op = FUSE_OPENDIR; 1343 else 1344 op = FUSE_OPEN; 1345 1346 /* 1347 * libfuse docs says 1348 * - O_CREAT and O_EXCL should never be set. 1349 * - O_TRUNC may be used if mount option atomic_o_trunc is used XXX 1350 * 1351 * O_APPEND makes no sense since FUSE always sends 1352 * the file offset for write operations. If the 1353 * filesystem uses pwrite(), O_APPEND would cause 1354 * the offset to be ignored and cause file corruption. 1355 */ 1356 mode &= ~(O_CREAT|O_EXCL|O_APPEND); 1357 1358 /* 1359 * Do not open twice, and do not reopen for reading 1360 * if we already have write handle. 1361 */ 1362 if (((mode & FREAD) && (pnd->pnd_flags & PND_RFH)) || 1363 ((mode & FREAD) && (pnd->pnd_flags & PND_WFH)) || 1364 ((mode & FWRITE) && (pnd->pnd_flags & PND_WFH))) 1365 goto out; 1366 1367 /* 1368 * Queue open on a node so that we do not open 1369 * twice. This would be better with read and 1370 * write distinguished. 1371 */ 1372 while (pnd->pnd_flags & PND_INOPEN) 1373 requeue_request(pu, opc, PCQ_OPEN); 1374 pnd->pnd_flags |= PND_INOPEN; 1375 1376 /* 1377 * Convert PUFFS mode to FUSE mode: convert FREAD/FWRITE 1378 * to O_RDONLY/O_WRONLY while perserving the other options. 1379 */ 1380 fmode = mode & ~(FREAD|FWRITE); 1381 fmode |= (mode & FWRITE) ? O_RDWR : O_RDONLY; 1382 1383 pm = ps->ps_new_msg(pu, opc, op, sizeof(*foi), pcr); 1384 foi = GET_INPAYLOAD(ps, pm, fuse_open_in); 1385 foi->flags = fmode; 1386 foi->unused = 0; 1387 1388 if ((error = xchg_msg(pu, opc, pm, sizeof(*foo), wait_reply)) != 0) 1389 goto out; 1390 1391 foo = GET_OUTPAYLOAD(ps, pm, fuse_open_out); 1392 1393 /* 1394 * Save the file handle in node private data 1395 * so that we can reuse it later 1396 */ 1397 perfuse_new_fh(opc, foo->fh, mode); 1398 1399 #ifdef PERFUSE_DEBUG 1400 if (perfuse_diagflags & (PDF_FH|PDF_FILENAME)) 1401 DPRINTF("%s: opc = %p, file = \"%s\", " 1402 "nodeid = 0x%"PRIx64", %s%sfh = 0x%"PRIx64"\n", 1403 __func__, (void *)opc, perfuse_node_path(ps, opc), 1404 pnd->pnd_nodeid, mode & FREAD ? "r" : "", 1405 mode & FWRITE ? "w" : "", foo->fh); 1406 #endif 1407 1408 ps->ps_destroy_msg(pm); 1409 out: 1410 1411 pnd->pnd_flags &= ~PND_INOPEN; 1412 (void)dequeue_requests(opc, PCQ_OPEN, DEQUEUE_ALL); 1413 1414 node_rele(opc); 1415 return error; 1416 } 1417 1418 /* ARGSUSED0 */ 1419 int 1420 perfuse_node_close(struct puffs_usermount *pu, puffs_cookie_t opc, int flags, 1421 const struct puffs_cred *pcr) 1422 { 1423 struct perfuse_node_data *pnd; 1424 1425 pnd = PERFUSE_NODE_DATA(opc); 1426 1427 if (!(pnd->pnd_flags & PND_OPEN)) 1428 return EBADF; 1429 1430 /* 1431 * Actual close is postponed at inactive time. 1432 */ 1433 return 0; 1434 } 1435 1436 int 1437 perfuse_node_access(struct puffs_usermount *pu, puffs_cookie_t opc, int mode, 1438 const struct puffs_cred *pcr) 1439 { 1440 perfuse_msg_t *pm; 1441 struct perfuse_state *ps; 1442 struct fuse_access_in *fai; 1443 int error; 1444 1445 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 1446 return ENOENT; 1447 1448 node_ref(opc); 1449 1450 /* 1451 * If we previously detected the filesystem does not 1452 * implement access(), short-circuit the call and skip 1453 * to libpuffs access() emulation. 1454 */ 1455 ps = puffs_getspecific(pu); 1456 if (ps->ps_flags & PS_NO_ACCESS) { 1457 const struct vattr *vap; 1458 1459 vap = puffs_pn_getvap((struct puffs_node *)opc); 1460 1461 error = puffs_access(IFTOVT(vap->va_mode), 1462 vap->va_mode & ACCESSPERMS, 1463 vap->va_uid, vap->va_gid, 1464 (mode_t)mode, pcr); 1465 goto out; 1466 } 1467 1468 /* 1469 * Plain access call 1470 */ 1471 pm = ps->ps_new_msg(pu, opc, FUSE_ACCESS, sizeof(*fai), pcr); 1472 fai = GET_INPAYLOAD(ps, pm, fuse_access_in); 1473 fai->mask = 0; 1474 fai->mask |= (mode & PUFFS_VREAD) ? R_OK : 0; 1475 fai->mask |= (mode & PUFFS_VWRITE) ? W_OK : 0; 1476 fai->mask |= (mode & PUFFS_VEXEC) ? X_OK : 0; 1477 1478 error = xchg_msg(pu, opc, pm, NO_PAYLOAD_REPLY_LEN, wait_reply); 1479 1480 ps->ps_destroy_msg(pm); 1481 1482 /* 1483 * If unimplemented, start over with emulation 1484 */ 1485 if (error == ENOSYS) { 1486 ps->ps_flags |= PS_NO_ACCESS; 1487 error = perfuse_node_access(pu, opc, mode, pcr); 1488 } 1489 1490 out: 1491 node_rele(opc); 1492 return error; 1493 } 1494 1495 int 1496 perfuse_node_getattr(struct puffs_usermount *pu, puffs_cookie_t opc, 1497 struct vattr *vap, const struct puffs_cred *pcr) 1498 { 1499 return perfuse_node_getattr_ttl(pu, opc, vap, pcr, NULL); 1500 } 1501 1502 int 1503 perfuse_node_getattr_ttl(struct puffs_usermount *pu, puffs_cookie_t opc, 1504 struct vattr *vap, const struct puffs_cred *pcr, 1505 struct timespec *va_ttl) 1506 { 1507 perfuse_msg_t *pm = NULL; 1508 struct perfuse_state *ps; 1509 struct perfuse_node_data *pnd = PERFUSE_NODE_DATA(opc); 1510 struct fuse_getattr_in *fgi; 1511 struct fuse_attr_out *fao; 1512 int error = 0; 1513 1514 if (pnd->pnd_flags & PND_REMOVED) 1515 return ENOENT; 1516 1517 node_ref(opc); 1518 1519 /* 1520 * Serialize size access, see comment in perfuse_node_setattr(). 1521 */ 1522 while (pnd->pnd_flags & PND_INRESIZE) 1523 requeue_request(pu, opc, PCQ_RESIZE); 1524 pnd->pnd_flags |= PND_INRESIZE; 1525 1526 ps = puffs_getspecific(pu); 1527 1528 /* 1529 * FUSE_GETATTR_FH must be set in fgi->flags 1530 * if we use for fgi->fh 1531 */ 1532 pm = ps->ps_new_msg(pu, opc, FUSE_GETATTR, sizeof(*fgi), pcr); 1533 fgi = GET_INPAYLOAD(ps, pm, fuse_getattr_in); 1534 fgi->getattr_flags = 0; 1535 fgi->dummy = 0; 1536 fgi->fh = 0; 1537 1538 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_OPEN) { 1539 fgi->fh = perfuse_get_fh(opc, FREAD); 1540 fgi->getattr_flags |= FUSE_GETATTR_FH; 1541 } 1542 1543 #ifdef PERFUSE_DEBUG 1544 if (perfuse_diagflags & PDF_RESIZE) 1545 DPRINTF(">> %s %p %" PRIu64 "\n", __func__, (void *)opc, 1546 vap->va_size); 1547 #endif 1548 1549 if ((error = xchg_msg(pu, opc, pm, sizeof(*fao), wait_reply)) != 0) 1550 goto out; 1551 1552 fao = GET_OUTPAYLOAD(ps, pm, fuse_attr_out); 1553 1554 #ifdef PERFUSE_DEBUG 1555 if (perfuse_diagflags & PDF_RESIZE) 1556 DPRINTF("<< %s %p %" PRIu64 " -> %" PRIu64 "\n", __func__, 1557 (void *)opc, vap->va_size, fao->attr.size); 1558 #endif 1559 1560 /* 1561 * We set birthtime, flags, filerev,vaflags to 0. 1562 * This seems the best bet, since the information is 1563 * not available from filesystem. 1564 */ 1565 fuse_attr_to_vap(ps, vap, &fao->attr); 1566 1567 if (va_ttl != NULL) { 1568 va_ttl->tv_sec = fao->attr_valid; 1569 va_ttl->tv_nsec = fao->attr_valid_nsec; 1570 } 1571 1572 ps->ps_destroy_msg(pm); 1573 error = 0; 1574 out: 1575 1576 pnd->pnd_flags &= ~PND_INRESIZE; 1577 (void)dequeue_requests(opc, PCQ_RESIZE, DEQUEUE_ALL); 1578 1579 node_rele(opc); 1580 return error; 1581 } 1582 1583 int 1584 perfuse_node_setattr(struct puffs_usermount *pu, puffs_cookie_t opc, 1585 const struct vattr *vap, const struct puffs_cred *pcr) 1586 { 1587 return perfuse_node_setattr_ttl(pu, opc, 1588 __UNCONST(vap), pcr, NULL, 0); 1589 } 1590 1591 int 1592 perfuse_node_setattr_ttl(struct puffs_usermount *pu, puffs_cookie_t opc, 1593 struct vattr *vap, const struct puffs_cred *pcr, 1594 struct timespec *va_ttl, int xflag) 1595 { 1596 perfuse_msg_t *pm; 1597 uint64_t fh; 1598 struct perfuse_state *ps; 1599 struct perfuse_node_data *pnd; 1600 struct fuse_setattr_in *fsi; 1601 struct fuse_attr_out *fao; 1602 struct vattr *old_va; 1603 enum perfuse_xchg_pb_reply reply; 1604 int error; 1605 #ifdef PERFUSE_DEBUG 1606 struct vattr *old_vap; 1607 int resize_debug = 0; 1608 #endif 1609 ps = puffs_getspecific(pu); 1610 pnd = PERFUSE_NODE_DATA(opc); 1611 1612 /* 1613 * The only operation we can do once the file is removed 1614 * is to resize it, and we can do it only if it is open. 1615 * Do not even send the operation to the filesystem: the 1616 * file is not there anymore. 1617 */ 1618 if (pnd->pnd_flags & PND_REMOVED) { 1619 if (!(pnd->pnd_flags & PND_OPEN)) 1620 return ENOENT; 1621 1622 return 0; 1623 } 1624 1625 old_va = puffs_pn_getvap((struct puffs_node *)opc); 1626 1627 /* 1628 * Check for permission to change size 1629 * It is always allowed if we already have a write file handle 1630 */ 1631 if ((vap->va_size != (u_quad_t)PUFFS_VNOVAL) && 1632 !(pnd->pnd_flags & PND_WFH) && 1633 (error = mode_access(opc, pcr, PUFFS_VWRITE)) != 0) 1634 return error; 1635 1636 /* 1637 * Check for permission to change dates 1638 */ 1639 if (((vap->va_atime.tv_sec != (time_t)PUFFS_VNOVAL) || 1640 (vap->va_mtime.tv_sec != (time_t)PUFFS_VNOVAL)) && 1641 (puffs_access_times(old_va->va_uid, old_va->va_gid, 1642 old_va->va_mode, 0, pcr) != 0)) 1643 return EACCES; 1644 1645 /* 1646 * Check for permission to change owner and group 1647 */ 1648 if (((vap->va_uid != (uid_t)PUFFS_VNOVAL) || 1649 (vap->va_gid != (gid_t)PUFFS_VNOVAL)) && 1650 (puffs_access_chown(old_va->va_uid, old_va->va_gid, 1651 vap->va_uid, vap->va_gid, pcr)) != 0) 1652 return EACCES; 1653 1654 /* 1655 * Check for permission to change permissions 1656 */ 1657 if ((vap->va_mode != (mode_t)PUFFS_VNOVAL) && 1658 (puffs_access_chmod(old_va->va_uid, old_va->va_gid, 1659 old_va->va_type, vap->va_mode, pcr)) != 0) 1660 return EACCES; 1661 1662 node_ref(opc); 1663 1664 if (pnd->pnd_flags & PND_WFH) 1665 fh = perfuse_get_fh(opc, FWRITE); 1666 else 1667 fh = FUSE_UNKNOWN_FH; 1668 1669 /* 1670 * fchmod() sets mode and fh, and it may carry 1671 * a resize as well. That may break if the 1672 * filesystem does chmod then resize, and fails 1673 * because it does not have permission anymore. 1674 * We work this around by splitting into two setattr. 1675 */ 1676 if ((vap->va_size != (u_quad_t)PUFFS_VNOVAL) && 1677 (vap->va_mode != (mode_t)PUFFS_VNOVAL) && 1678 (fh != FUSE_UNKNOWN_FH)) { 1679 struct vattr resize_va; 1680 1681 (void)memcpy(&resize_va, vap, sizeof(resize_va)); 1682 resize_va.va_mode = (mode_t)PUFFS_VNOVAL; 1683 if ((error = perfuse_node_setattr_ttl(pu, opc, &resize_va, 1684 pcr, va_ttl, xflag)) != 0) 1685 goto out2; 1686 1687 vap->va_size = (u_quad_t)PUFFS_VNOVAL; 1688 } 1689 1690 pm = ps->ps_new_msg(pu, opc, FUSE_SETATTR, sizeof(*fsi), pcr); 1691 fsi = GET_INPAYLOAD(ps, pm, fuse_setattr_in); 1692 fsi->valid = 0; 1693 1694 /* 1695 * Get a fh if the node is open for writing 1696 */ 1697 if (fh != FUSE_UNKNOWN_FH) { 1698 fsi->fh = fh; 1699 fsi->valid |= FUSE_FATTR_FH; 1700 } 1701 1702 1703 if (vap->va_size != (u_quad_t)PUFFS_VNOVAL) { 1704 fsi->size = vap->va_size; 1705 fsi->valid |= FUSE_FATTR_SIZE; 1706 1707 /* 1708 * Serialize anything that can touch file size 1709 * to avoid reordered GETATTR and SETATTR. 1710 * Out of order SETATTR can report stale size, 1711 * which will cause the kernel to truncate the file. 1712 * XXX Probably useless now we have a lock on GETATTR 1713 */ 1714 while (pnd->pnd_flags & PND_INRESIZE) 1715 requeue_request(pu, opc, PCQ_RESIZE); 1716 pnd->pnd_flags |= PND_INRESIZE; 1717 } 1718 1719 /* 1720 * Setting mtime without atime or vice versa leads to 1721 * dates being reset to Epoch on glusterfs. If one 1722 * is missing, use the old value. 1723 */ 1724 if ((vap->va_mtime.tv_sec != (time_t)PUFFS_VNOVAL) || 1725 (vap->va_atime.tv_sec != (time_t)PUFFS_VNOVAL)) { 1726 1727 if (vap->va_atime.tv_sec != (time_t)PUFFS_VNOVAL) { 1728 fsi->atime = vap->va_atime.tv_sec; 1729 fsi->atimensec = (uint32_t)vap->va_atime.tv_nsec; 1730 } else { 1731 fsi->atime = old_va->va_atime.tv_sec; 1732 fsi->atimensec = (uint32_t)old_va->va_atime.tv_nsec; 1733 } 1734 1735 if (vap->va_mtime.tv_sec != (time_t)PUFFS_VNOVAL) { 1736 fsi->mtime = vap->va_mtime.tv_sec; 1737 fsi->mtimensec = (uint32_t)vap->va_mtime.tv_nsec; 1738 } else { 1739 fsi->mtime = old_va->va_mtime.tv_sec; 1740 fsi->mtimensec = (uint32_t)old_va->va_mtime.tv_nsec; 1741 } 1742 1743 fsi->valid |= (FUSE_FATTR_MTIME|FUSE_FATTR_ATIME); 1744 } 1745 1746 if (vap->va_mode != (mode_t)PUFFS_VNOVAL) { 1747 fsi->mode = vap->va_mode; 1748 fsi->valid |= FUSE_FATTR_MODE; 1749 } 1750 1751 if (vap->va_uid != (uid_t)PUFFS_VNOVAL) { 1752 fsi->uid = vap->va_uid; 1753 fsi->valid |= FUSE_FATTR_UID; 1754 } 1755 1756 if (vap->va_gid != (gid_t)PUFFS_VNOVAL) { 1757 fsi->gid = vap->va_gid; 1758 fsi->valid |= FUSE_FATTR_GID; 1759 } 1760 1761 if (pnd->pnd_lock_owner != 0) { 1762 fsi->lock_owner = pnd->pnd_lock_owner; 1763 fsi->valid |= FUSE_FATTR_LOCKOWNER; 1764 } 1765 1766 /* 1767 * ftruncate() sends only va_size, and metadata cache 1768 * flush adds va_atime and va_mtime. Some FUSE 1769 * filesystems will attempt to detect ftruncate by 1770 * checking for FATTR_SIZE being set without 1771 * FATTR_UID|FATTR_GID|FATTR_ATIME|FATTR_MTIME|FATTR_MODE 1772 * 1773 * Try to adapt and remove FATTR_ATIME|FATTR_MTIME 1774 * if we suspect a ftruncate(). 1775 */ 1776 if ((vap->va_size != (u_quad_t)PUFFS_VNOVAL) && 1777 ((vap->va_mode == (mode_t)PUFFS_VNOVAL) && 1778 (vap->va_uid == (uid_t)PUFFS_VNOVAL) && 1779 (vap->va_gid == (gid_t)PUFFS_VNOVAL))) { 1780 fsi->atime = 0; 1781 fsi->atimensec = 0; 1782 fsi->mtime = 0; 1783 fsi->mtimensec = 0; 1784 fsi->valid &= ~(FUSE_FATTR_ATIME|FUSE_FATTR_MTIME); 1785 } 1786 1787 /* 1788 * If nothing remain, discard the operation. 1789 */ 1790 if (!(fsi->valid & (FUSE_FATTR_SIZE|FUSE_FATTR_ATIME|FUSE_FATTR_MTIME| 1791 FUSE_FATTR_MODE|FUSE_FATTR_UID|FUSE_FATTR_GID))) { 1792 error = 0; 1793 ps->ps_destroy_msg(pm); 1794 goto out; 1795 } 1796 1797 #ifdef PERFUSE_DEBUG 1798 old_vap = puffs_pn_getvap((struct puffs_node *)opc); 1799 1800 if ((perfuse_diagflags & PDF_RESIZE) && 1801 (old_vap->va_size != (u_quad_t)PUFFS_VNOVAL)) { 1802 resize_debug = 1; 1803 1804 DPRINTF(">> %s %p %" PRIu64 " -> %" PRIu64 "\n", __func__, 1805 (void *)opc, 1806 puffs_pn_getvap((struct puffs_node *)opc)->va_size, 1807 fsi->size); 1808 } 1809 #endif 1810 1811 /* 1812 * Do not honour FAF when changing size. How do 1813 * you want such a thing to work? 1814 */ 1815 reply = wait_reply; 1816 #ifdef PUFFS_SETATTR_FAF 1817 if ((xflag & PUFFS_SETATTR_FAF) && !(fsi->valid & FUSE_FATTR_SIZE)) 1818 reply = no_reply; 1819 #endif 1820 if ((error = xchg_msg(pu, opc, pm, sizeof(*fao), reply)) != 0) 1821 goto out; 1822 1823 if (reply == no_reply) 1824 goto out; 1825 1826 /* 1827 * Copy back the new values 1828 */ 1829 fao = GET_OUTPAYLOAD(ps, pm, fuse_attr_out); 1830 1831 #ifdef PERFUSE_DEBUG 1832 if (resize_debug) 1833 DPRINTF("<< %s %p %" PRIu64 " -> %" PRIu64 "\n", __func__, 1834 (void *)opc, old_vap->va_size, fao->attr.size); 1835 #endif 1836 1837 fuse_attr_to_vap(ps, old_va, &fao->attr); 1838 1839 if (va_ttl != NULL) { 1840 va_ttl->tv_sec = fao->attr_valid; 1841 va_ttl->tv_nsec = fao->attr_valid_nsec; 1842 (void)memcpy(vap, old_va, sizeof(*vap)); 1843 } 1844 1845 ps->ps_destroy_msg(pm); 1846 error = 0; 1847 1848 out: 1849 if (pnd->pnd_flags & PND_INRESIZE) { 1850 pnd->pnd_flags &= ~PND_INRESIZE; 1851 (void)dequeue_requests(opc, PCQ_RESIZE, DEQUEUE_ALL); 1852 } 1853 1854 out2: 1855 node_rele(opc); 1856 return error; 1857 } 1858 1859 int 1860 perfuse_node_poll(struct puffs_usermount *pu, puffs_cookie_t opc, int *events) 1861 { 1862 struct perfuse_state *ps; 1863 perfuse_msg_t *pm; 1864 struct fuse_poll_in *fpi; 1865 struct fuse_poll_out *fpo; 1866 int error; 1867 1868 node_ref(opc); 1869 ps = puffs_getspecific(pu); 1870 /* 1871 * kh is set if FUSE_POLL_SCHEDULE_NOTIFY is set. 1872 * 1873 * XXX ps_new_msg() is called with NULL creds, which will 1874 * be interpreted as FUSE superuser. We have no way to 1875 * know the requesting process' credential, but since poll 1876 * is supposed to operate on a file that has been open, 1877 * permission should have already been checked at open time. 1878 * That still may breaks on filesystems that provides odd 1879 * semantics. 1880 */ 1881 pm = ps->ps_new_msg(pu, opc, FUSE_POLL, sizeof(*fpi), NULL); 1882 fpi = GET_INPAYLOAD(ps, pm, fuse_poll_in); 1883 fpi->fh = perfuse_get_fh(opc, FREAD); 1884 fpi->kh = 0; 1885 fpi->flags = 0; 1886 1887 #ifdef PERFUSE_DEBUG 1888 if (perfuse_diagflags & PDF_FH) 1889 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", " 1890 "fh = 0x%"PRIx64"\n", __func__, (void *)opc, 1891 PERFUSE_NODE_DATA(opc)->pnd_nodeid, fpi->fh); 1892 #endif 1893 if ((error = xchg_msg(pu, opc, pm, sizeof(*fpo), wait_reply)) != 0) 1894 goto out; 1895 1896 fpo = GET_OUTPAYLOAD(ps, pm, fuse_poll_out); 1897 *events = fpo->revents; 1898 1899 ps->ps_destroy_msg(pm); 1900 error = 0; 1901 1902 out: 1903 node_rele(opc); 1904 return error; 1905 } 1906 1907 /* ARGSUSED0 */ 1908 int 1909 perfuse_node_mmap(struct puffs_usermount *pu, puffs_cookie_t opc, int flags, 1910 const struct puffs_cred *pcr) 1911 { 1912 /* 1913 * Not implemented anymore in libfuse 1914 */ 1915 return ENOSYS; 1916 } 1917 1918 /* ARGSUSED2 */ 1919 int 1920 perfuse_node_fsync(struct puffs_usermount *pu, puffs_cookie_t opc, 1921 const struct puffs_cred *pcr, int flags, off_t offlo, off_t offhi) 1922 { 1923 int op; 1924 perfuse_msg_t *pm; 1925 struct perfuse_state *ps; 1926 struct perfuse_node_data *pnd; 1927 struct fuse_fsync_in *ffi; 1928 uint64_t fh; 1929 int error = 0; 1930 1931 pm = NULL; 1932 ps = puffs_getspecific(pu); 1933 pnd = PERFUSE_NODE_DATA(opc); 1934 1935 /* 1936 * No need to sync a removed node 1937 */ 1938 if (pnd->pnd_flags & PND_REMOVED) 1939 return 0; 1940 1941 /* 1942 * We do not sync closed files. They have been 1943 * sync at inactive time already. 1944 */ 1945 if (!(pnd->pnd_flags & PND_OPEN)) 1946 return 0; 1947 1948 node_ref(opc); 1949 1950 if (puffs_pn_getvap((struct puffs_node *)opc)->va_type == VDIR) 1951 op = FUSE_FSYNCDIR; 1952 else /* VREG but also other types such as VLNK */ 1953 op = FUSE_FSYNC; 1954 1955 /* 1956 * Do not sync if there are no change to sync 1957 * XXX remove that test on files if we implement mmap 1958 */ 1959 #ifdef PERFUSE_DEBUG 1960 if (perfuse_diagflags & PDF_SYNC) 1961 DPRINTF("%s: TEST opc = %p, file = \"%s\" is %sdirty\n", 1962 __func__, (void*)opc, perfuse_node_path(ps, opc), 1963 pnd->pnd_flags & PND_DIRTY ? "" : "not "); 1964 #endif 1965 if (!(pnd->pnd_flags & PND_DIRTY)) 1966 goto out; 1967 1968 /* 1969 * It seems NetBSD can call fsync without open first 1970 * glusterfs complain in such a situation: 1971 * "FSYNC() ERR => -1 (Invalid argument)" 1972 * The file will be closed at inactive time. 1973 * 1974 * We open the directory for reading in order to sync. 1975 * This sounds rather counterintuitive, but it works. 1976 */ 1977 if (!(pnd->pnd_flags & PND_WFH)) { 1978 if ((error = perfuse_node_open(pu, opc, FREAD, pcr)) != 0) 1979 goto out; 1980 } 1981 1982 if (op == FUSE_FSYNCDIR) 1983 fh = perfuse_get_fh(opc, FREAD); 1984 else 1985 fh = perfuse_get_fh(opc, FWRITE); 1986 1987 /* 1988 * If fsync_flags is set, meta data should not be flushed. 1989 */ 1990 pm = ps->ps_new_msg(pu, opc, op, sizeof(*ffi), pcr); 1991 ffi = GET_INPAYLOAD(ps, pm, fuse_fsync_in); 1992 ffi->fh = fh; 1993 ffi->fsync_flags = (flags & FFILESYNC) ? 0 : 1; 1994 1995 #ifdef PERFUSE_DEBUG 1996 if (perfuse_diagflags & PDF_FH) 1997 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", fh = 0x%"PRIx64"\n", 1998 __func__, (void *)opc, 1999 PERFUSE_NODE_DATA(opc)->pnd_nodeid, ffi->fh); 2000 #endif 2001 2002 if ((error = xchg_msg(pu, opc, pm, 2003 NO_PAYLOAD_REPLY_LEN, wait_reply)) != 0) 2004 goto out; 2005 2006 /* 2007 * No reply beyond fuse_out_header: nothing to do on success 2008 * just clear the dirty flag 2009 */ 2010 pnd->pnd_flags &= ~PND_DIRTY; 2011 2012 #ifdef PERFUSE_DEBUG 2013 if (perfuse_diagflags & PDF_SYNC) 2014 DPRINTF("%s: CLEAR opc = %p, file = \"%s\"\n", 2015 __func__, (void*)opc, perfuse_node_path(ps, opc)); 2016 #endif 2017 2018 ps->ps_destroy_msg(pm); 2019 error = 0; 2020 2021 out: 2022 /* 2023 * ENOSYS is not returned to kernel, 2024 */ 2025 if (error == ENOSYS) 2026 error = 0; 2027 2028 node_rele(opc); 2029 return error; 2030 } 2031 2032 /* ARGSUSED0 */ 2033 int 2034 perfuse_node_seek(struct puffs_usermount *pu, puffs_cookie_t opc, 2035 off_t oldoff, off_t newoff, const struct puffs_cred *pcr) 2036 { 2037 return 0; 2038 } 2039 2040 int 2041 perfuse_node_remove(struct puffs_usermount *pu, puffs_cookie_t opc, 2042 puffs_cookie_t targ, const struct puffs_cn *pcn) 2043 { 2044 struct perfuse_state *ps; 2045 struct perfuse_node_data *pnd; 2046 perfuse_msg_t *pm; 2047 char *path; 2048 const char *name; 2049 size_t len; 2050 int error; 2051 2052 pnd = PERFUSE_NODE_DATA(opc); 2053 2054 if ((pnd->pnd_flags & PND_REMOVED) || 2055 (PERFUSE_NODE_DATA(targ)->pnd_flags & PND_REMOVED)) 2056 return ENOENT; 2057 2058 #ifdef PERFUSE_DEBUG 2059 if (targ == NULL) 2060 DERRX(EX_SOFTWARE, "%s: targ is NULL", __func__); 2061 2062 if (perfuse_diagflags & (PDF_FH|PDF_FILENAME)) 2063 DPRINTF("%s: opc = %p, remove opc = %p, file = \"%s\"\n", 2064 __func__, (void *)opc, (void *)targ, pcn->pcn_name); 2065 #endif 2066 node_ref(opc); 2067 node_ref(targ); 2068 2069 /* 2070 * Await for all operations on the deleted node to drain, 2071 * as the filesystem may be confused to have it deleted 2072 * during a getattr 2073 */ 2074 while (PERFUSE_NODE_DATA(targ)->pnd_inxchg) 2075 requeue_request(pu, targ, PCQ_AFTERXCHG); 2076 2077 ps = puffs_getspecific(pu); 2078 pnd = PERFUSE_NODE_DATA(opc); 2079 name = pcn->pcn_name; 2080 len = pcn->pcn_namelen + 1; 2081 2082 pm = ps->ps_new_msg(pu, opc, FUSE_UNLINK, len, pcn->pcn_cred); 2083 path = _GET_INPAYLOAD(ps, pm, char *); 2084 (void)strlcpy(path, name, len); 2085 2086 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 2087 goto out; 2088 2089 perfuse_cache_flush(targ); 2090 PERFUSE_NODE_DATA(targ)->pnd_flags |= PND_REMOVED; 2091 2092 if (!(PERFUSE_NODE_DATA(targ)->pnd_flags & PND_OPEN)) 2093 puffs_setback(puffs_cc_getcc(pu), PUFFS_SETBACK_NOREF_N2); 2094 2095 /* 2096 * The parent directory needs a sync 2097 */ 2098 PERFUSE_NODE_DATA(opc)->pnd_flags |= PND_DIRTY; 2099 2100 #ifdef PERFUSE_DEBUG 2101 if (perfuse_diagflags & PDF_FILENAME) 2102 DPRINTF("%s: remove nodeid = 0x%"PRIx64" file = \"%s\"\n", 2103 __func__, PERFUSE_NODE_DATA(targ)->pnd_nodeid, 2104 pcn->pcn_name); 2105 #endif 2106 ps->ps_destroy_msg(pm); 2107 error = 0; 2108 2109 out: 2110 node_rele(opc); 2111 node_rele(targ); 2112 return error; 2113 } 2114 2115 int 2116 perfuse_node_link(struct puffs_usermount *pu, puffs_cookie_t opc, 2117 puffs_cookie_t targ, const struct puffs_cn *pcn) 2118 { 2119 struct perfuse_state *ps; 2120 perfuse_msg_t *pm; 2121 const char *name; 2122 size_t len; 2123 struct puffs_node *pn; 2124 struct fuse_link_in *fli; 2125 int error; 2126 2127 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 2128 return ENOENT; 2129 2130 node_ref(opc); 2131 node_ref(targ); 2132 ps = puffs_getspecific(pu); 2133 pn = (struct puffs_node *)targ; 2134 name = pcn->pcn_name; 2135 len = sizeof(*fli) + pcn->pcn_namelen + 1; 2136 2137 pm = ps->ps_new_msg(pu, opc, FUSE_LINK, len, pcn->pcn_cred); 2138 fli = GET_INPAYLOAD(ps, pm, fuse_link_in); 2139 fli->oldnodeid = PERFUSE_NODE_DATA(pn)->pnd_nodeid; 2140 (void)strlcpy((char *)(void *)(fli + 1), name, len - sizeof(*fli)); 2141 2142 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 2143 goto out; 2144 2145 ps->ps_destroy_msg(pm); 2146 error = 0; 2147 2148 out: 2149 node_rele(opc); 2150 node_rele(targ); 2151 return error; 2152 } 2153 2154 int 2155 perfuse_node_rename(struct puffs_usermount *pu, puffs_cookie_t opc, 2156 puffs_cookie_t src, const struct puffs_cn *pcn_src, 2157 puffs_cookie_t targ_dir, puffs_cookie_t targ, 2158 const struct puffs_cn *pcn_targ) 2159 { 2160 struct perfuse_state *ps; 2161 struct perfuse_node_data *dstdir_pnd; 2162 perfuse_msg_t *pm; 2163 struct fuse_rename_in *fri; 2164 const char *newname; 2165 const char *oldname; 2166 char *np; 2167 int error; 2168 size_t len; 2169 size_t newname_len; 2170 size_t oldname_len; 2171 2172 if ((PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) || 2173 (PERFUSE_NODE_DATA(src)->pnd_flags & PND_REMOVED) || 2174 (PERFUSE_NODE_DATA(targ_dir)->pnd_flags & PND_REMOVED)) 2175 return ENOENT; 2176 2177 node_ref(opc); 2178 node_ref(src); 2179 2180 /* 2181 * Await for all operations on the deleted node to drain, 2182 * as the filesystem may be confused to have it deleted 2183 * during a getattr 2184 */ 2185 if ((struct puffs_node *)targ != NULL) { 2186 node_ref(targ); 2187 while (PERFUSE_NODE_DATA(targ)->pnd_inxchg) 2188 requeue_request(pu, targ, PCQ_AFTERXCHG); 2189 } else { 2190 while (PERFUSE_NODE_DATA(src)->pnd_inxchg) 2191 requeue_request(pu, src, PCQ_AFTERXCHG); 2192 } 2193 2194 ps = puffs_getspecific(pu); 2195 newname = pcn_targ->pcn_name; 2196 newname_len = pcn_targ->pcn_namelen + 1; 2197 oldname = pcn_src->pcn_name; 2198 oldname_len = pcn_src->pcn_namelen + 1; 2199 2200 len = sizeof(*fri) + oldname_len + newname_len; 2201 pm = ps->ps_new_msg(pu, opc, FUSE_RENAME, len, pcn_targ->pcn_cred); 2202 fri = GET_INPAYLOAD(ps, pm, fuse_rename_in); 2203 fri->newdir = PERFUSE_NODE_DATA(targ_dir)->pnd_nodeid; 2204 np = (char *)(void *)(fri + 1); 2205 (void)strlcpy(np, oldname, oldname_len); 2206 np += oldname_len; 2207 (void)strlcpy(np, newname, newname_len); 2208 2209 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 2210 goto out; 2211 2212 2213 /* 2214 * Record new parent nodeid 2215 */ 2216 dstdir_pnd = PERFUSE_NODE_DATA(targ_dir); 2217 PERFUSE_NODE_DATA(src)->pnd_parent_nodeid = dstdir_pnd->pnd_nodeid; 2218 2219 if (opc != targ_dir) 2220 dstdir_pnd->pnd_flags |= PND_DIRTY; 2221 2222 if (strcmp(newname, "..") != 0) 2223 (void)strlcpy(PERFUSE_NODE_DATA(src)->pnd_name, 2224 newname, MAXPATHLEN); 2225 else 2226 PERFUSE_NODE_DATA(src)->pnd_name[0] = 0; /* forget name */ 2227 2228 PERFUSE_NODE_DATA(opc)->pnd_flags |= PND_DIRTY; 2229 2230 if ((struct puffs_node *)targ != NULL) { 2231 perfuse_cache_flush(targ); 2232 PERFUSE_NODE_DATA(targ)->pnd_flags |= PND_REMOVED; 2233 } 2234 2235 #ifdef PERFUSE_DEBUG 2236 if (perfuse_diagflags & PDF_FILENAME) 2237 DPRINTF("%s: nodeid = 0x%"PRIx64" file = \"%s\" renamed \"%s\" " 2238 "nodeid = 0x%"PRIx64" -> nodeid = 0x%"PRIx64" \"%s\"\n", 2239 __func__, PERFUSE_NODE_DATA(src)->pnd_nodeid, 2240 pcn_src->pcn_name, pcn_targ->pcn_name, 2241 PERFUSE_NODE_DATA(opc)->pnd_nodeid, 2242 PERFUSE_NODE_DATA(targ_dir)->pnd_nodeid, 2243 perfuse_node_path(ps, targ_dir)); 2244 #endif 2245 2246 ps->ps_destroy_msg(pm); 2247 error = 0; 2248 2249 out: 2250 node_rele(opc); 2251 node_rele(src); 2252 if ((struct puffs_node *)targ != NULL) 2253 node_rele(targ); 2254 2255 return error; 2256 } 2257 2258 int 2259 perfuse_node_mkdir(struct puffs_usermount *pu, puffs_cookie_t opc, 2260 struct puffs_newinfo *pni, const struct puffs_cn *pcn, 2261 const struct vattr *vap) 2262 { 2263 struct perfuse_state *ps; 2264 perfuse_msg_t *pm; 2265 struct fuse_mkdir_in *fmi; 2266 const char *path; 2267 size_t len; 2268 int error; 2269 2270 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 2271 return ENOENT; 2272 2273 node_ref(opc); 2274 ps = puffs_getspecific(pu); 2275 path = pcn->pcn_name; 2276 len = sizeof(*fmi) + pcn->pcn_namelen + 1; 2277 2278 pm = ps->ps_new_msg(pu, opc, FUSE_MKDIR, len, pcn->pcn_cred); 2279 fmi = GET_INPAYLOAD(ps, pm, fuse_mkdir_in); 2280 fmi->mode = vap->va_mode; 2281 fmi->umask = 0; /* Seems unused by libfuse? */ 2282 (void)strlcpy((char *)(void *)(fmi + 1), path, len - sizeof(*fmi)); 2283 2284 error = node_mk_common(pu, opc, pni, pcn, pm); 2285 2286 node_rele(opc); 2287 return error; 2288 } 2289 2290 2291 int 2292 perfuse_node_rmdir(struct puffs_usermount *pu, puffs_cookie_t opc, 2293 puffs_cookie_t targ, const struct puffs_cn *pcn) 2294 { 2295 struct perfuse_state *ps; 2296 struct perfuse_node_data *pnd; 2297 perfuse_msg_t *pm; 2298 char *path; 2299 const char *name; 2300 size_t len; 2301 int error; 2302 2303 pnd = PERFUSE_NODE_DATA(opc); 2304 2305 if ((pnd->pnd_flags & PND_REMOVED) || 2306 (PERFUSE_NODE_DATA(targ)->pnd_flags & PND_REMOVED)) 2307 return ENOENT; 2308 2309 node_ref(opc); 2310 node_ref(targ); 2311 2312 /* 2313 * Await for all operations on the deleted node to drain, 2314 * as the filesystem may be confused to have it deleted 2315 * during a getattr 2316 */ 2317 while (PERFUSE_NODE_DATA(targ)->pnd_inxchg) 2318 requeue_request(pu, targ, PCQ_AFTERXCHG); 2319 2320 ps = puffs_getspecific(pu); 2321 name = pcn->pcn_name; 2322 len = pcn->pcn_namelen + 1; 2323 2324 pm = ps->ps_new_msg(pu, opc, FUSE_RMDIR, len, pcn->pcn_cred); 2325 path = _GET_INPAYLOAD(ps, pm, char *); 2326 (void)strlcpy(path, name, len); 2327 2328 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 2329 goto out; 2330 2331 perfuse_cache_flush(targ); 2332 PERFUSE_NODE_DATA(targ)->pnd_flags |= PND_REMOVED; 2333 2334 if (!(PERFUSE_NODE_DATA(targ)->pnd_flags & PND_OPEN)) 2335 puffs_setback(puffs_cc_getcc(pu), PUFFS_SETBACK_NOREF_N2); 2336 2337 /* 2338 * The parent directory needs a sync 2339 */ 2340 PERFUSE_NODE_DATA(opc)->pnd_flags |= PND_DIRTY; 2341 2342 #ifdef PERFUSE_DEBUG 2343 if (perfuse_diagflags & PDF_FILENAME) 2344 DPRINTF("%s: remove nodeid = 0x%"PRIx64" file = \"%s\"\n", 2345 __func__, PERFUSE_NODE_DATA(targ)->pnd_nodeid, 2346 perfuse_node_path(ps, targ)); 2347 #endif 2348 ps->ps_destroy_msg(pm); 2349 error = 0; 2350 2351 out: 2352 node_rele(opc); 2353 node_rele(targ); 2354 return error; 2355 } 2356 2357 /* vap is unused */ 2358 /* ARGSUSED4 */ 2359 int 2360 perfuse_node_symlink(struct puffs_usermount *pu, puffs_cookie_t opc, 2361 struct puffs_newinfo *pni, const struct puffs_cn *pcn_src, 2362 const struct vattr *vap, const char *link_target) 2363 { 2364 struct perfuse_state *ps; 2365 perfuse_msg_t *pm; 2366 char *np; 2367 const char *path; 2368 size_t path_len; 2369 size_t linkname_len; 2370 size_t len; 2371 int error; 2372 2373 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 2374 return ENOENT; 2375 2376 node_ref(opc); 2377 ps = puffs_getspecific(pu); 2378 path = pcn_src->pcn_name; 2379 path_len = pcn_src->pcn_namelen + 1; 2380 linkname_len = strlen(link_target) + 1; 2381 len = path_len + linkname_len; 2382 2383 pm = ps->ps_new_msg(pu, opc, FUSE_SYMLINK, len, pcn_src->pcn_cred); 2384 np = _GET_INPAYLOAD(ps, pm, char *); 2385 (void)strlcpy(np, path, path_len); 2386 np += path_len; 2387 (void)strlcpy(np, link_target, linkname_len); 2388 2389 error = node_mk_common(pu, opc, pni, pcn_src, pm); 2390 2391 node_rele(opc); 2392 return error; 2393 } 2394 2395 /* ARGSUSED4 */ 2396 int 2397 perfuse_node_readdir(struct puffs_usermount *pu, puffs_cookie_t opc, 2398 struct dirent *dent, off_t *readoff, size_t *reslen, 2399 const struct puffs_cred *pcr, int *eofflag, off_t *cookies, 2400 size_t *ncookies) 2401 { 2402 perfuse_msg_t *pm; 2403 uint64_t fh; 2404 struct perfuse_state *ps; 2405 struct perfuse_node_data *pnd; 2406 struct fuse_read_in *fri; 2407 struct fuse_out_header *foh; 2408 struct fuse_dirent *fd; 2409 size_t foh_len; 2410 int error; 2411 size_t fd_maxlen; 2412 2413 error = 0; 2414 node_ref(opc); 2415 ps = puffs_getspecific(pu); 2416 2417 /* 2418 * readdir state is kept at node level, and several readdir 2419 * requests can be issued at the same time on the same node. 2420 * We need to queue requests so that only one is in readdir 2421 * code at the same time. 2422 */ 2423 pnd = PERFUSE_NODE_DATA(opc); 2424 while (pnd->pnd_flags & PND_INREADDIR) 2425 requeue_request(pu, opc, PCQ_READDIR); 2426 pnd->pnd_flags |= PND_INREADDIR; 2427 2428 #ifdef PERFUSE_DEBUG 2429 if (perfuse_diagflags & PDF_READDIR) 2430 DPRINTF("%s: READDIR opc = %p enter critical section\n", 2431 __func__, (void *)opc); 2432 #endif 2433 /* 2434 * Re-initialize pnd->pnd_fd_cookie on the first readdir for a node 2435 */ 2436 if (*readoff == 0) 2437 pnd->pnd_fd_cookie = 0; 2438 2439 /* 2440 * Do we already have the data bufered? 2441 */ 2442 if (pnd->pnd_dirent != NULL) 2443 goto out; 2444 pnd->pnd_dirent_len = 0; 2445 2446 /* 2447 * It seems NetBSD can call readdir without open first 2448 * libfuse will crash if it is done that way, hence open first. 2449 */ 2450 if (!(pnd->pnd_flags & PND_OPEN)) { 2451 if ((error = perfuse_node_open(pu, opc, FREAD, pcr)) != 0) 2452 goto out; 2453 } 2454 2455 fh = perfuse_get_fh(opc, FREAD); 2456 2457 #ifdef PERFUSE_DEBUG 2458 if (perfuse_diagflags & PDF_FH) 2459 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", " 2460 "rfh = 0x%"PRIx64"\n", __func__, (void *)opc, 2461 PERFUSE_NODE_DATA(opc)->pnd_nodeid, fh); 2462 #endif 2463 2464 pnd->pnd_all_fd = NULL; 2465 pnd->pnd_all_fd_len = 0; 2466 fd_maxlen = ps->ps_max_readahead - sizeof(*foh); 2467 2468 do { 2469 size_t fd_len; 2470 char *afdp; 2471 2472 pm = ps->ps_new_msg(pu, opc, FUSE_READDIR, sizeof(*fri), pcr); 2473 2474 /* 2475 * read_flags, lock_owner and flags are unused in libfuse 2476 */ 2477 fri = GET_INPAYLOAD(ps, pm, fuse_read_in); 2478 fri->fh = fh; 2479 fri->offset = pnd->pnd_fd_cookie; 2480 fri->size = (uint32_t)fd_maxlen; 2481 fri->read_flags = 0; 2482 fri->lock_owner = 0; 2483 fri->flags = 0; 2484 2485 if ((error = xchg_msg(pu, opc, pm, 2486 UNSPEC_REPLY_LEN, wait_reply)) != 0) 2487 goto out; 2488 2489 /* 2490 * There are many puffs_framebufs calls later, 2491 * therefore foh will not be valid for a long time. 2492 * Just get the length and forget it. 2493 */ 2494 foh = GET_OUTHDR(ps, pm); 2495 foh_len = foh->len; 2496 2497 /* 2498 * Empty read: we reached the end of the buffer. 2499 */ 2500 if (foh_len == sizeof(*foh)) { 2501 ps->ps_destroy_msg(pm); 2502 *eofflag = 1; 2503 break; 2504 } 2505 2506 /* 2507 * Check for corrupted message. 2508 */ 2509 if (foh_len < sizeof(*foh) + sizeof(*fd)) { 2510 ps->ps_destroy_msg(pm); 2511 DWARNX("readdir reply too short"); 2512 error = EIO; 2513 goto out; 2514 } 2515 2516 2517 fd = GET_OUTPAYLOAD(ps, pm, fuse_dirent); 2518 fd_len = foh_len - sizeof(*foh); 2519 2520 pnd->pnd_all_fd = realloc(pnd->pnd_all_fd, 2521 pnd->pnd_all_fd_len + fd_len); 2522 if (pnd->pnd_all_fd == NULL) 2523 DERR(EX_OSERR, "%s: malloc failed", __func__); 2524 2525 afdp = (char *)(void *)pnd->pnd_all_fd + pnd->pnd_all_fd_len; 2526 (void)memcpy(afdp, fd, fd_len); 2527 2528 pnd->pnd_all_fd_len += fd_len; 2529 2530 /* 2531 * The fd->off field is used as a cookie for 2532 * resuming the next readdir() where this one was left. 2533 */ 2534 pnd->pnd_fd_cookie = readdir_last_cookie(fd, fd_len); 2535 2536 ps->ps_destroy_msg(pm); 2537 } while (1 /* CONSTCOND */); 2538 2539 if (pnd->pnd_all_fd != NULL) { 2540 if (fuse_to_dirent(pu, opc, pnd->pnd_all_fd, 2541 pnd->pnd_all_fd_len) == -1) 2542 error = EIO; 2543 } 2544 2545 out: 2546 if (pnd->pnd_all_fd != NULL) { 2547 free(pnd->pnd_all_fd); 2548 pnd->pnd_all_fd = NULL; 2549 pnd->pnd_all_fd_len = 0; 2550 } 2551 2552 if (error == 0) 2553 readdir_buffered(opc, dent, readoff, reslen); 2554 2555 /* 2556 * Schedule queued readdir requests 2557 */ 2558 pnd->pnd_flags &= ~PND_INREADDIR; 2559 (void)dequeue_requests(opc, PCQ_READDIR, DEQUEUE_ALL); 2560 2561 #ifdef PERFUSE_DEBUG 2562 if (perfuse_diagflags & PDF_READDIR) 2563 DPRINTF("%s: READDIR opc = %p exit critical section\n", 2564 __func__, (void *)opc); 2565 #endif 2566 2567 node_rele(opc); 2568 return error; 2569 } 2570 2571 int 2572 perfuse_node_readlink(struct puffs_usermount *pu, puffs_cookie_t opc, 2573 const struct puffs_cred *pcr, char *linkname, size_t *linklen) 2574 { 2575 struct perfuse_state *ps; 2576 perfuse_msg_t *pm; 2577 int error; 2578 size_t len; 2579 struct fuse_out_header *foh; 2580 2581 if (PERFUSE_NODE_DATA(opc)->pnd_flags & PND_REMOVED) 2582 return ENOENT; 2583 2584 node_ref(opc); 2585 ps = puffs_getspecific(pu); 2586 2587 pm = ps->ps_new_msg(pu, opc, FUSE_READLINK, 0, pcr); 2588 2589 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 2590 goto out; 2591 2592 foh = GET_OUTHDR(ps, pm); 2593 len = foh->len - sizeof(*foh); 2594 if (len > *linklen) 2595 DERRX(EX_PROTOCOL, "path len = %zd too long", len); 2596 if (len == 0) 2597 DERRX(EX_PROTOCOL, "path len = %zd too short", len); 2598 2599 /* 2600 * FUSE filesystems return a NUL terminated string, we 2601 * do not want to trailing \0 2602 */ 2603 *linklen = len - 1; 2604 (void)memcpy(linkname, _GET_OUTPAYLOAD(ps, pm, char *), len); 2605 2606 ps->ps_destroy_msg(pm); 2607 error = 0; 2608 2609 out: 2610 node_rele(opc); 2611 return error; 2612 } 2613 2614 int 2615 perfuse_node_reclaim(struct puffs_usermount *pu, puffs_cookie_t opc) 2616 { 2617 struct perfuse_state *ps; 2618 perfuse_msg_t *pm; 2619 struct perfuse_node_data *pnd; 2620 struct fuse_forget_in *ffi; 2621 int nlookup; 2622 struct timespec now; 2623 2624 if (opc == 0) 2625 return 0; 2626 2627 ps = puffs_getspecific(pu); 2628 pnd = PERFUSE_NODE_DATA(opc); 2629 2630 /* 2631 * Never forget the root. 2632 */ 2633 if (pnd->pnd_nodeid == FUSE_ROOT_ID) 2634 return 0; 2635 2636 /* 2637 * There is a race condition between reclaim and lookup. 2638 * When looking up an already known node, the kernel cannot 2639 * hold a reference on the result until it gets the PUFFS 2640 * reply. It mayy therefore reclaim the node after the 2641 * userland looked it up, and before it gets the reply. 2642 * On rely, the kernel re-creates the node, but at that 2643 * time the node has been reclaimed in userland. 2644 * 2645 * In order to avoid this, we refuse reclaiming nodes that 2646 * are too young since the last lookup - and that we do 2647 * not have removed on our own, of course. 2648 */ 2649 if (clock_gettime(CLOCK_REALTIME, &now) != 0) 2650 DERR(EX_OSERR, "clock_gettime failed"); 2651 2652 if (timespeccmp(&pnd->pnd_cn_expire, &now, >) && 2653 !(pnd->pnd_flags & PND_REMOVED)) { 2654 if (!(pnd->pnd_flags & PND_NODELEAK)) { 2655 ps->ps_nodeleakcount++; 2656 pnd->pnd_flags |= PND_NODELEAK; 2657 } 2658 DWARNX("possible leaked node:: opc = %p \"%s\"", 2659 opc, pnd->pnd_name); 2660 return 0; 2661 } 2662 2663 node_ref(opc); 2664 pnd->pnd_flags |= PND_RECLAIMED; 2665 pnd->pnd_puffs_nlookup--; 2666 nlookup = pnd->pnd_puffs_nlookup; 2667 2668 #ifdef PERFUSE_DEBUG 2669 if (perfuse_diagflags & PDF_RECLAIM) 2670 DPRINTF("%s (nodeid %"PRId64") reclaimed\n", 2671 perfuse_node_path(ps, opc), pnd->pnd_nodeid); 2672 #endif 2673 2674 #ifdef PERFUSE_DEBUG 2675 if (perfuse_diagflags & PDF_RECLAIM) 2676 DPRINTF("%s (nodeid %"PRId64") is %sreclaimed, nlookup = %d " 2677 "%s%s%s%s, pending ops:%s%s%s\n", 2678 perfuse_node_path(ps, opc), pnd->pnd_nodeid, 2679 pnd->pnd_flags & PND_RECLAIMED ? "" : "not ", 2680 pnd->pnd_puffs_nlookup, 2681 pnd->pnd_flags & PND_OPEN ? "open " : "not open", 2682 pnd->pnd_flags & PND_RFH ? "r" : "", 2683 pnd->pnd_flags & PND_WFH ? "w" : "", 2684 pnd->pnd_flags & PND_BUSY ? "" : " none", 2685 pnd->pnd_flags & PND_INREADDIR ? " readdir" : "", 2686 pnd->pnd_flags & PND_INWRITE ? " write" : "", 2687 pnd->pnd_flags & PND_INOPEN ? " open" : ""); 2688 #endif 2689 /* 2690 * Make sure it is not looked up again 2691 */ 2692 if (!(pnd->pnd_flags & PND_REMOVED)) 2693 perfuse_cache_flush(opc); 2694 2695 /* 2696 * Purge any activity on the node, while checking 2697 * that it remains eligible for a reclaim. 2698 */ 2699 while (pnd->pnd_ref > 1) 2700 requeue_request(pu, opc, PCQ_REF); 2701 2702 /* 2703 * reclaim cancel? 2704 */ 2705 if (pnd->pnd_puffs_nlookup > nlookup) { 2706 pnd->pnd_flags &= ~PND_RECLAIMED; 2707 perfuse_node_cache(ps, opc); 2708 node_rele(opc); 2709 return 0; 2710 } 2711 2712 2713 #ifdef PERFUSE_DEBUG 2714 if ((pnd->pnd_flags & PND_OPEN) || 2715 !TAILQ_EMPTY(&pnd->pnd_pcq)) 2716 DERRX(EX_SOFTWARE, "%s: opc = %p: still open", 2717 __func__, opc); 2718 2719 if ((pnd->pnd_flags & PND_BUSY) || 2720 !TAILQ_EMPTY(&pnd->pnd_pcq)) 2721 DERRX(EX_SOFTWARE, "%s: opc = %p: queued operations", 2722 __func__, opc); 2723 2724 if (pnd->pnd_inxchg != 0) 2725 DERRX(EX_SOFTWARE, "%s: opc = %p: ongoing operations", 2726 __func__, opc); 2727 #endif 2728 2729 /* 2730 * Send the FORGET message 2731 * 2732 * ps_new_msg() is called with NULL creds, which will 2733 * be interpreted as FUSE superuser. This is obviously 2734 * fine since we operate with kernel creds here. 2735 */ 2736 pm = ps->ps_new_msg(pu, opc, FUSE_FORGET, 2737 sizeof(*ffi), NULL); 2738 ffi = GET_INPAYLOAD(ps, pm, fuse_forget_in); 2739 ffi->nlookup = pnd->pnd_fuse_nlookup; 2740 2741 /* 2742 * No reply is expected, pm is freed in xchg_msg 2743 */ 2744 (void)xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, no_reply); 2745 2746 perfuse_destroy_pn(pu, opc); 2747 2748 return 0; 2749 } 2750 2751 int 2752 perfuse_node_inactive(struct puffs_usermount *pu, puffs_cookie_t opc) 2753 { 2754 struct perfuse_node_data *pnd; 2755 int error; 2756 2757 if (opc == 0) 2758 return 0; 2759 2760 node_ref(opc); 2761 pnd = PERFUSE_NODE_DATA(opc); 2762 2763 if (!(pnd->pnd_flags & (PND_OPEN|PND_REMOVED))) 2764 goto out; 2765 2766 /* 2767 * Make sure all operation are finished 2768 * There can be an ongoing write. Other 2769 * operation wait for all data before 2770 * the close/inactive. 2771 */ 2772 while (pnd->pnd_flags & PND_INWRITE) 2773 requeue_request(pu, opc, PCQ_AFTERWRITE); 2774 2775 /* 2776 * The inactive operation may be cancelled, 2777 * If no open is in progress, set PND_INOPEN 2778 * so that a new open will be queued. 2779 */ 2780 if (pnd->pnd_flags & PND_INOPEN) 2781 goto out; 2782 2783 pnd->pnd_flags |= PND_INOPEN; 2784 2785 /* 2786 * Sync data 2787 */ 2788 if (pnd->pnd_flags & PND_DIRTY) { 2789 if ((error = perfuse_node_fsync(pu, opc, NULL, 0, 0, 0)) != 0) 2790 DWARN("%s: perfuse_node_fsync failed error = %d", 2791 __func__, error); 2792 } 2793 2794 2795 /* 2796 * Close handles 2797 */ 2798 if (pnd->pnd_flags & PND_WFH) { 2799 if ((error = perfuse_node_close_common(pu, opc, FWRITE)) != 0) 2800 DWARN("%s: close write FH failed error = %d", 2801 __func__, error); 2802 } 2803 2804 if (pnd->pnd_flags & PND_RFH) { 2805 if ((error = perfuse_node_close_common(pu, opc, FREAD)) != 0) 2806 DWARN("%s: close read FH failed error = %d", 2807 __func__, error); 2808 } 2809 2810 /* 2811 * This will cause a reclaim to be sent 2812 */ 2813 if (pnd->pnd_flags & PND_REMOVED) 2814 puffs_setback(puffs_cc_getcc(pu), PUFFS_SETBACK_NOREF_N1); 2815 2816 /* 2817 * Schedule awaiting operations 2818 */ 2819 pnd->pnd_flags &= ~PND_INOPEN; 2820 (void)dequeue_requests(opc, PCQ_OPEN, DEQUEUE_ALL); 2821 2822 /* 2823 * errors are ignored, since the kernel ignores the return code. 2824 */ 2825 out: 2826 node_rele(opc); 2827 return 0; 2828 } 2829 2830 2831 /* ARGSUSED0 */ 2832 int 2833 perfuse_node_print(struct puffs_usermount *pu, puffs_cookie_t opc) 2834 { 2835 DERRX(EX_SOFTWARE, "%s: UNIMPLEMENTED (FATAL)", __func__); 2836 return 0; 2837 } 2838 2839 /* ARGSUSED0 */ 2840 int 2841 perfuse_node_pathconf(struct puffs_usermount *pu, puffs_cookie_t opc, 2842 int name, int *retval) 2843 { 2844 DERRX(EX_SOFTWARE, "%s: UNIMPLEMENTED (FATAL)", __func__); 2845 return 0; 2846 } 2847 2848 int 2849 perfuse_node_advlock(struct puffs_usermount *pu, puffs_cookie_t opc, 2850 void *id, int op, struct flock *fl, int flags) 2851 { 2852 struct perfuse_state *ps; 2853 int fop; 2854 perfuse_msg_t *pm; 2855 uint64_t fh; 2856 struct fuse_lk_in *fli; 2857 struct fuse_out_header *foh; 2858 struct fuse_lk_out *flo; 2859 uint32_t owner; 2860 size_t len; 2861 int error; 2862 2863 node_ref(opc); 2864 2865 /* 2866 * Make sure we do have a filehandle, as the FUSE filesystem 2867 * expect one. E.g.: if we provide none, GlusterFS logs an error 2868 * "0-glusterfs-fuse: xl is NULL" 2869 * 2870 * We need the read file handle if the file is open read only, 2871 * in order to support shared locks on read-only files. 2872 * NB: The kernel always sends advlock for read-only 2873 * files at exit time when the process used lock, see 2874 * sys_exit -> exit1 -> fd_free -> fd_close -> VOP_ADVLOCK 2875 */ 2876 if ((fh = perfuse_get_fh(opc, FREAD)) == FUSE_UNKNOWN_FH) { 2877 error = EBADF; 2878 goto out; 2879 } 2880 2881 ps = puffs_getspecific(pu); 2882 2883 if (op == F_GETLK) 2884 fop = FUSE_GETLK; 2885 else 2886 fop = (flags & F_WAIT) ? FUSE_SETLKW : FUSE_SETLK; 2887 2888 /* 2889 * XXX ps_new_msg() is called with NULL creds, which will 2890 * be interpreted as FUSE superuser. We have no way to 2891 * know the requesting process' credential, but since advlock() 2892 * is supposed to operate on a file that has been open(), 2893 * permission should have already been checked at open() time. 2894 */ 2895 pm = ps->ps_new_msg(pu, opc, fop, sizeof(*fli), NULL); 2896 fli = GET_INPAYLOAD(ps, pm, fuse_lk_in); 2897 fli->fh = fh; 2898 fli->owner = (uint64_t)(vaddr_t)id; 2899 fli->lk.start = fl->l_start; 2900 fli->lk.end = fl->l_start + fl->l_len; 2901 fli->lk.type = fl->l_type; 2902 fli->lk.pid = fl->l_pid; 2903 fli->lk_flags = (flags & F_FLOCK) ? FUSE_LK_FLOCK : 0; 2904 2905 owner = (uint32_t)(vaddr_t)id; 2906 2907 #ifdef PERFUSE_DEBUG 2908 if (perfuse_diagflags & PDF_FH) 2909 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", fh = 0x%"PRIx64"\n", 2910 __func__, (void *)opc, 2911 PERFUSE_NODE_DATA(opc)->pnd_nodeid, fli->fh); 2912 #endif 2913 2914 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 2915 goto out; 2916 2917 foh = GET_OUTHDR(ps, pm); 2918 len = foh->len - sizeof(*foh); 2919 2920 /* 2921 * Save or clear the lock 2922 */ 2923 switch (op) { 2924 case F_GETLK: 2925 if (len != sizeof(*flo)) 2926 DERRX(EX_SOFTWARE, 2927 "%s: Unexpected lock reply len %zd", 2928 __func__, len); 2929 2930 flo = GET_OUTPAYLOAD(ps, pm, fuse_lk_out); 2931 fl->l_start = flo->lk.start; 2932 fl->l_len = flo->lk.end - flo->lk.start; 2933 fl->l_pid = flo->lk.pid; 2934 fl->l_type = flo->lk.type; 2935 fl->l_whence = SEEK_SET; /* libfuse hardcodes it */ 2936 2937 PERFUSE_NODE_DATA(opc)->pnd_lock_owner = flo->lk.pid; 2938 break; 2939 case F_UNLCK: 2940 owner = 0; 2941 /* FALLTHROUGH */ 2942 case F_SETLK: 2943 /* FALLTHROUGH */ 2944 case F_SETLKW: 2945 if (error != 0) 2946 PERFUSE_NODE_DATA(opc)->pnd_lock_owner = owner; 2947 2948 if (len != 0) 2949 DERRX(EX_SOFTWARE, 2950 "%s: Unexpected unlock reply len %zd", 2951 __func__, len); 2952 2953 break; 2954 default: 2955 DERRX(EX_SOFTWARE, "%s: Unexpected op %d", __func__, op); 2956 break; 2957 } 2958 2959 ps->ps_destroy_msg(pm); 2960 error = 0; 2961 2962 out: 2963 node_rele(opc); 2964 return error; 2965 } 2966 2967 int 2968 perfuse_node_read(struct puffs_usermount *pu, puffs_cookie_t opc, uint8_t *buf, 2969 off_t offset, size_t *resid, const struct puffs_cred *pcr, int ioflag) 2970 { 2971 struct perfuse_state *ps; 2972 struct perfuse_node_data *pnd; 2973 const struct vattr *vap; 2974 perfuse_msg_t *pm; 2975 struct fuse_read_in *fri; 2976 struct fuse_out_header *foh; 2977 size_t readen; 2978 int error; 2979 2980 ps = puffs_getspecific(pu); 2981 pnd = PERFUSE_NODE_DATA(opc); 2982 vap = puffs_pn_getvap((struct puffs_node *)opc); 2983 2984 /* 2985 * NetBSD turns that into a getdents(2) output 2986 * We just do a EISDIR as this feature is of little use. 2987 */ 2988 if (vap->va_type == VDIR) 2989 return EISDIR; 2990 2991 if ((u_quad_t)offset + *resid > vap->va_size) 2992 DWARNX("%s %p read %lld@%zu beyond EOF %" PRIu64 "\n", 2993 __func__, (void *)opc, (long long)offset, 2994 *resid, vap->va_size); 2995 2996 do { 2997 size_t max_read; 2998 2999 max_read = ps->ps_max_readahead - sizeof(*foh); 3000 /* 3001 * flags may be set to FUSE_READ_LOCKOWNER 3002 * if lock_owner is provided. 3003 */ 3004 pm = ps->ps_new_msg(pu, opc, FUSE_READ, sizeof(*fri), pcr); 3005 fri = GET_INPAYLOAD(ps, pm, fuse_read_in); 3006 fri->fh = perfuse_get_fh(opc, FREAD); 3007 fri->offset = offset; 3008 fri->size = (uint32_t)MIN(*resid, max_read); 3009 fri->read_flags = 0; /* XXX Unused by libfuse? */ 3010 fri->lock_owner = pnd->pnd_lock_owner; 3011 fri->flags = 0; 3012 fri->flags |= (fri->lock_owner != 0) ? FUSE_READ_LOCKOWNER : 0; 3013 3014 #ifdef PERFUSE_DEBUG 3015 if (perfuse_diagflags & PDF_FH) 3016 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", fh = 0x%"PRIx64"\n", 3017 __func__, (void *)opc, pnd->pnd_nodeid, fri->fh); 3018 #endif 3019 error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply); 3020 if (error != 0) 3021 return error; 3022 3023 foh = GET_OUTHDR(ps, pm); 3024 readen = foh->len - sizeof(*foh); 3025 3026 #ifdef PERFUSE_DEBUG 3027 if (readen > *resid) 3028 DERRX(EX_SOFTWARE, "%s: Unexpected big read %zd", 3029 __func__, readen); 3030 #endif 3031 3032 (void)memcpy(buf, _GET_OUTPAYLOAD(ps, pm, char *), readen); 3033 3034 buf += readen; 3035 offset += readen; 3036 *resid -= readen; 3037 3038 ps->ps_destroy_msg(pm); 3039 } while ((*resid != 0) && (readen != 0)); 3040 3041 if (ioflag & (IO_SYNC|IO_DSYNC)) 3042 ps->ps_syncreads++; 3043 else 3044 ps->ps_asyncreads++; 3045 3046 return 0; 3047 } 3048 3049 int 3050 perfuse_node_write(struct puffs_usermount *pu, puffs_cookie_t opc, 3051 uint8_t *buf, off_t offset, size_t *resid, 3052 const struct puffs_cred *pcr, int ioflag) 3053 { 3054 return perfuse_node_write2(pu, opc, buf, offset, resid, pcr, ioflag, 0); 3055 } 3056 3057 /* ARGSUSED7 */ 3058 int 3059 perfuse_node_write2(struct puffs_usermount *pu, puffs_cookie_t opc, 3060 uint8_t *buf, off_t offset, size_t *resid, 3061 const struct puffs_cred *pcr, int ioflag, int xflag) 3062 { 3063 struct perfuse_state *ps; 3064 struct perfuse_node_data *pnd; 3065 struct vattr *vap; 3066 perfuse_msg_t *pm; 3067 struct fuse_write_in *fwi; 3068 struct fuse_write_out *fwo; 3069 size_t data_len; 3070 size_t payload_len; 3071 size_t written; 3072 int inresize; 3073 int error; 3074 3075 ps = puffs_getspecific(pu); 3076 pnd = PERFUSE_NODE_DATA(opc); 3077 vap = puffs_pn_getvap((struct puffs_node *)opc); 3078 written = 0; 3079 inresize = 0; 3080 error = 0; 3081 3082 if (vap->va_type == VDIR) 3083 return EISDIR; 3084 3085 node_ref(opc); 3086 3087 /* 3088 * We need to queue write requests in order to avoid 3089 * dequeueing PCQ_AFTERWRITE when there are pending writes. 3090 */ 3091 while (pnd->pnd_flags & PND_INWRITE) 3092 requeue_request(pu, opc, PCQ_WRITE); 3093 pnd->pnd_flags |= PND_INWRITE; 3094 3095 /* 3096 * Serialize size access, see comment in perfuse_node_setattr(). 3097 */ 3098 if ((u_quad_t)offset + *resid > vap->va_size) { 3099 while (pnd->pnd_flags & PND_INRESIZE) 3100 requeue_request(pu, opc, PCQ_RESIZE); 3101 pnd->pnd_flags |= PND_INRESIZE; 3102 inresize = 1; 3103 } 3104 3105 /* 3106 * append flag: re-read the file size so that 3107 * we get the latest value. 3108 */ 3109 if (ioflag & PUFFS_IO_APPEND) { 3110 DWARNX("%s: PUFFS_IO_APPEND set, untested code", __func__); 3111 3112 if ((error = perfuse_node_getattr(pu, opc, vap, pcr)) != 0) 3113 goto out; 3114 3115 offset = vap->va_size; 3116 } 3117 3118 #ifdef PERFUSE_DEBUG 3119 if (perfuse_diagflags & PDF_RESIZE) 3120 DPRINTF(">> %s %p %" PRIu64 "\n", __func__, 3121 (void *)opc, vap->va_size); 3122 #endif 3123 3124 do { 3125 size_t max_write; 3126 /* 3127 * There is a writepage flag when data 3128 * is aligned to page size. Use it for 3129 * everything but the data after the last 3130 * page boundary. 3131 */ 3132 max_write = ps->ps_max_write - sizeof(*fwi); 3133 3134 data_len = MIN(*resid, max_write); 3135 if (data_len > (size_t)sysconf(_SC_PAGESIZE)) 3136 data_len = data_len & ~(sysconf(_SC_PAGESIZE) - 1); 3137 3138 payload_len = data_len + sizeof(*fwi); 3139 3140 /* 3141 * flags may be set to FUSE_WRITE_CACHE (XXX usage?) 3142 * or FUSE_WRITE_LOCKOWNER, if lock_owner is provided. 3143 * write_flags is set to 1 for writepage. 3144 */ 3145 pm = ps->ps_new_msg(pu, opc, FUSE_WRITE, payload_len, pcr); 3146 fwi = GET_INPAYLOAD(ps, pm, fuse_write_in); 3147 fwi->fh = perfuse_get_fh(opc, FWRITE); 3148 fwi->offset = offset; 3149 fwi->size = (uint32_t)data_len; 3150 fwi->write_flags = (fwi->size % sysconf(_SC_PAGESIZE)) ? 0 : 1; 3151 fwi->lock_owner = pnd->pnd_lock_owner; 3152 fwi->flags = 0; 3153 fwi->flags |= (fwi->lock_owner != 0) ? FUSE_WRITE_LOCKOWNER : 0; 3154 fwi->flags |= (ioflag & IO_DIRECT) ? 0 : FUSE_WRITE_CACHE; 3155 (void)memcpy((fwi + 1), buf, data_len); 3156 3157 3158 #ifdef PERFUSE_DEBUG 3159 if (perfuse_diagflags & PDF_FH) 3160 DPRINTF("%s: opc = %p, nodeid = 0x%"PRIx64", " 3161 "fh = 0x%"PRIx64"\n", __func__, 3162 (void *)opc, pnd->pnd_nodeid, fwi->fh); 3163 #endif 3164 if ((error = xchg_msg(pu, opc, pm, 3165 sizeof(*fwo), wait_reply)) != 0) 3166 goto out; 3167 3168 fwo = GET_OUTPAYLOAD(ps, pm, fuse_write_out); 3169 written = fwo->size; 3170 ps->ps_destroy_msg(pm); 3171 3172 #ifdef PERFUSE_DEBUG 3173 if (written > *resid) 3174 DERRX(EX_SOFTWARE, "%s: Unexpected big write %zd", 3175 __func__, written); 3176 #endif 3177 *resid -= written; 3178 offset += written; 3179 buf += written; 3180 3181 } while (*resid != 0); 3182 3183 /* 3184 * puffs_ops(3) says 3185 * "everything must be written or an error will be generated" 3186 */ 3187 if (*resid != 0) 3188 error = EFBIG; 3189 3190 #ifdef PERFUSE_DEBUG 3191 if (perfuse_diagflags & PDF_RESIZE) { 3192 if (offset > (off_t)vap->va_size) 3193 DPRINTF("<< %s %p %" PRIu64 " -> %lld\n", __func__, 3194 (void *)opc, vap->va_size, (long long)offset); 3195 else 3196 DPRINTF("<< %s %p \n", __func__, (void *)opc); 3197 } 3198 #endif 3199 3200 /* 3201 * Update file size if we wrote beyond the end 3202 */ 3203 if (offset > (off_t)vap->va_size) 3204 vap->va_size = offset; 3205 3206 if (inresize) { 3207 #ifdef PERFUSE_DEBUG 3208 if (!(pnd->pnd_flags & PND_INRESIZE)) 3209 DERRX(EX_SOFTWARE, "file write grow without resize"); 3210 #endif 3211 pnd->pnd_flags &= ~PND_INRESIZE; 3212 (void)dequeue_requests(opc, PCQ_RESIZE, DEQUEUE_ALL); 3213 } 3214 3215 3216 /* 3217 * Statistics 3218 */ 3219 if (ioflag & (IO_SYNC|IO_DSYNC)) 3220 ps->ps_syncwrites++; 3221 else 3222 ps->ps_asyncwrites++; 3223 3224 /* 3225 * Remember to sync the file 3226 */ 3227 pnd->pnd_flags |= PND_DIRTY; 3228 3229 #ifdef PERFUSE_DEBUG 3230 if (perfuse_diagflags & PDF_SYNC) 3231 DPRINTF("%s: DIRTY opc = %p, file = \"%s\"\n", 3232 __func__, (void*)opc, perfuse_node_path(ps, opc)); 3233 #endif 3234 3235 out: 3236 /* 3237 * VOP_PUTPAGE causes FAF write where kernel does not 3238 * check operation result. At least warn if it failed. 3239 */ 3240 #ifdef PUFFS_WRITE_FAF 3241 if (error && (xflag & PUFFS_WRITE_FAF)) 3242 DWARN("Data loss caused by FAF write failed on \"%s\"", 3243 pnd->pnd_name); 3244 #endif /* PUFFS_WRITE_FAF */ 3245 3246 /* 3247 * If there are no more queued write, we can resume 3248 * an operation awaiting write completion. 3249 */ 3250 pnd->pnd_flags &= ~PND_INWRITE; 3251 if (dequeue_requests(opc, PCQ_WRITE, 1) == 0) 3252 (void)dequeue_requests(opc, PCQ_AFTERWRITE, DEQUEUE_ALL); 3253 3254 node_rele(opc); 3255 return error; 3256 } 3257 3258 /* ARGSUSED0 */ 3259 void 3260 perfuse_cache_write(struct puffs_usermount *pu, puffs_cookie_t opc, size_t size, 3261 struct puffs_cacherun *runs) 3262 { 3263 return; 3264 } 3265 3266 /* ARGSUSED4 */ 3267 int 3268 perfuse_node_getextattr(struct puffs_usermount *pu, puffs_cookie_t opc, 3269 int attrns, const char *attrname, size_t *attrsize, uint8_t *attr, 3270 size_t *resid, const struct puffs_cred *pcr) 3271 { 3272 struct perfuse_state *ps; 3273 char fuse_attrname[LINUX_XATTR_NAME_MAX + 1]; 3274 perfuse_msg_t *pm; 3275 struct fuse_getxattr_in *fgi; 3276 struct fuse_getxattr_out *fgo; 3277 struct fuse_out_header *foh; 3278 size_t attrnamelen; 3279 size_t len; 3280 char *np; 3281 int error; 3282 3283 node_ref(opc); 3284 ps = puffs_getspecific(pu); 3285 attrname = perfuse_native_ns(attrns, attrname, fuse_attrname); 3286 attrnamelen = strlen(attrname) + 1; 3287 len = sizeof(*fgi) + attrnamelen; 3288 3289 pm = ps->ps_new_msg(pu, opc, FUSE_GETXATTR, len, pcr); 3290 fgi = GET_INPAYLOAD(ps, pm, fuse_getxattr_in); 3291 fgi->size = (unsigned int)((resid != NULL) ? *resid : 0); 3292 np = (char *)(void *)(fgi + 1); 3293 (void)strlcpy(np, attrname, attrnamelen); 3294 3295 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 3296 goto out; 3297 3298 /* 3299 * We just get fuse_getattr_out with list size if we requested 3300 * a null size. 3301 */ 3302 if (resid == NULL) { 3303 fgo = GET_OUTPAYLOAD(ps, pm, fuse_getxattr_out); 3304 3305 if (attrsize != NULL) 3306 *attrsize = fgo->size; 3307 3308 ps->ps_destroy_msg(pm); 3309 error = 0; 3310 goto out; 3311 } 3312 3313 /* 3314 * And with a non null requested size, we get the list just 3315 * after the header 3316 */ 3317 foh = GET_OUTHDR(ps, pm); 3318 np = (char *)(void *)(foh + 1); 3319 3320 if (resid != NULL) { 3321 len = MAX(foh->len - sizeof(*foh), *resid); 3322 (void)memcpy(attr, np, len); 3323 *resid -= len; 3324 } 3325 3326 ps->ps_destroy_msg(pm); 3327 error = 0; 3328 3329 out: 3330 node_rele(opc); 3331 return error; 3332 } 3333 3334 int 3335 perfuse_node_setextattr(struct puffs_usermount *pu, puffs_cookie_t opc, 3336 int attrns, const char *attrname, uint8_t *attr, size_t *resid, 3337 const struct puffs_cred *pcr) 3338 { 3339 struct perfuse_state *ps; 3340 char fuse_attrname[LINUX_XATTR_NAME_MAX + 1]; 3341 perfuse_msg_t *pm; 3342 struct fuse_setxattr_in *fsi; 3343 size_t attrnamelen; 3344 size_t len; 3345 char *np; 3346 int error; 3347 3348 node_ref(opc); 3349 ps = puffs_getspecific(pu); 3350 attrname = perfuse_native_ns(attrns, attrname, fuse_attrname); 3351 attrnamelen = strlen(attrname) + 1; 3352 len = sizeof(*fsi) + attrnamelen + *resid; 3353 3354 pm = ps->ps_new_msg(pu, opc, FUSE_SETXATTR, len, pcr); 3355 fsi = GET_INPAYLOAD(ps, pm, fuse_setxattr_in); 3356 fsi->size = (unsigned int)*resid; 3357 fsi->flags = 0; 3358 np = (char *)(void *)(fsi + 1); 3359 (void)strlcpy(np, attrname, attrnamelen); 3360 np += attrnamelen; 3361 (void)memcpy(np, (char *)attr, *resid); 3362 3363 if ((error = xchg_msg(pu, opc, pm, 3364 NO_PAYLOAD_REPLY_LEN, wait_reply)) != 0) 3365 goto out; 3366 3367 ps->ps_destroy_msg(pm); 3368 *resid = 0; 3369 error = 0; 3370 3371 out: 3372 node_rele(opc); 3373 return error; 3374 } 3375 3376 /* ARGSUSED2 */ 3377 int 3378 perfuse_node_listextattr(struct puffs_usermount *pu, puffs_cookie_t opc, 3379 int attrns, size_t *attrsize, uint8_t *attrs, size_t *resid, int flag, 3380 const struct puffs_cred *pcr) 3381 { 3382 struct perfuse_state *ps; 3383 perfuse_msg_t *pm; 3384 struct fuse_getxattr_in *fgi; 3385 struct fuse_getxattr_out *fgo; 3386 struct fuse_out_header *foh; 3387 char *np; 3388 size_t len, puffs_len; 3389 int error; 3390 3391 node_ref(opc); 3392 3393 ps = puffs_getspecific(pu); 3394 len = sizeof(*fgi); 3395 3396 pm = ps->ps_new_msg(pu, opc, FUSE_LISTXATTR, len, pcr); 3397 fgi = GET_INPAYLOAD(ps, pm, fuse_getxattr_in); 3398 if (resid != NULL) 3399 fgi->size = (unsigned int)*resid; 3400 else 3401 fgi->size = 0; 3402 3403 if ((error = xchg_msg(pu, opc, pm, UNSPEC_REPLY_LEN, wait_reply)) != 0) 3404 goto out; 3405 3406 /* 3407 * We just get fuse_getattr_out with list size if we requested 3408 * a null size. 3409 */ 3410 if (resid == NULL) { 3411 fgo = GET_OUTPAYLOAD(ps, pm, fuse_getxattr_out); 3412 3413 if (attrsize != NULL) 3414 *attrsize = fgo->size; 3415 3416 ps->ps_destroy_msg(pm); 3417 3418 error = 0; 3419 goto out; 3420 } 3421 3422 /* 3423 * And with a non null requested size, we get the list just 3424 * after the header 3425 */ 3426 foh = GET_OUTHDR(ps, pm); 3427 np = (char *)(void *)(foh + 1); 3428 puffs_len = foh->len - sizeof(*foh); 3429 3430 if (attrs != NULL) { 3431 #ifdef PUFFS_EXTATTR_LIST_LENPREFIX 3432 /* 3433 * Convert the FUSE reply to length prefixed strings 3434 * if this is what the kernel wants. 3435 */ 3436 if (flag & PUFFS_EXTATTR_LIST_LENPREFIX) { 3437 size_t i, attrlen; 3438 3439 for (i = 0; i < puffs_len; i += attrlen + 1) { 3440 attrlen = strlen(np + i); 3441 (void)memmove(np + i + 1, np + i, attrlen); 3442 *(np + i) = (uint8_t)attrlen; 3443 } 3444 } 3445 #endif /* PUFFS_EXTATTR_LIST_LENPREFIX */ 3446 (void)memcpy(attrs, np, puffs_len); 3447 *resid -= puffs_len; 3448 } 3449 3450 if (attrsize != NULL) 3451 *attrsize = puffs_len; 3452 3453 ps->ps_destroy_msg(pm); 3454 error = 0; 3455 3456 out: 3457 node_rele(opc); 3458 return error; 3459 } 3460 3461 int 3462 perfuse_node_deleteextattr(struct puffs_usermount *pu, puffs_cookie_t opc, 3463 int attrns, const char *attrname, const struct puffs_cred *pcr) 3464 { 3465 struct perfuse_state *ps; 3466 char fuse_attrname[LINUX_XATTR_NAME_MAX + 1]; 3467 perfuse_msg_t *pm; 3468 size_t attrnamelen; 3469 char *np; 3470 int error; 3471 3472 node_ref(opc); 3473 3474 ps = puffs_getspecific(pu); 3475 attrname = perfuse_native_ns(attrns, attrname, fuse_attrname); 3476 attrnamelen = strlen(attrname) + 1; 3477 3478 pm = ps->ps_new_msg(pu, opc, FUSE_REMOVEXATTR, attrnamelen, pcr); 3479 np = _GET_INPAYLOAD(ps, pm, char *); 3480 (void)strlcpy(np, attrname, attrnamelen); 3481 3482 error = xchg_msg(pu, opc, pm, NO_PAYLOAD_REPLY_LEN, wait_reply); 3483 3484 ps->ps_destroy_msg(pm); 3485 3486 node_rele(opc); 3487 return error; 3488 } 3489
Indexes created Thu Oct 02 14:10:14 GMT 2025