1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2007-2009 Google Inc. and Amit Singh 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions are 9 * met: 10 * 11 * * Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * * Redistributions in binary form must reproduce the above 14 * copyright notice, this list of conditions and the following disclaimer 15 * in the documentation and/or other materials provided with the 16 * distribution. 17 * * Neither the name of Google Inc. nor the names of its 18 * contributors may be used to endorse or promote products derived from 19 * this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 * 33 * Copyright (C) 2005 Csaba Henk. 34 * All rights reserved. 35 * 36 * Copyright (c) 2019 The FreeBSD Foundation 37 * 38 * Portions of this software were developed by BFF Storage Systems, LLC under 39 * sponsorship from the FreeBSD Foundation. 40 * 41 * Redistribution and use in source and binary forms, with or without 42 * modification, are permitted provided that the following conditions 43 * are met: 44 * 1. Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * 2. Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in the 48 * documentation and/or other materials provided with the distribution. 49 * 50 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 53 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 60 * SUCH DAMAGE. 61 */ 62 63 #include <sys/cdefs.h> 64 __FBSDID("$FreeBSD$"); 65 66 #include <sys/param.h> 67 #include <sys/module.h> 68 #include <sys/systm.h> 69 #include <sys/errno.h> 70 #include <sys/kernel.h> 71 #include <sys/conf.h> 72 #include <sys/filio.h> 73 #include <sys/uio.h> 74 #include <sys/malloc.h> 75 #include <sys/queue.h> 76 #include <sys/limits.h> 77 #include <sys/lock.h> 78 #include <sys/rwlock.h> 79 #include <sys/sx.h> 80 #include <sys/proc.h> 81 #include <sys/mount.h> 82 #include <sys/vnode.h> 83 #include <sys/namei.h> 84 #include <sys/extattr.h> 85 #include <sys/stat.h> 86 #include <sys/unistd.h> 87 #include <sys/filedesc.h> 88 #include <sys/file.h> 89 #include <sys/fcntl.h> 90 #include <sys/dirent.h> 91 #include <sys/bio.h> 92 #include <sys/buf.h> 93 #include <sys/sysctl.h> 94 #include <sys/vmmeter.h> 95 96 #include <vm/vm.h> 97 #include <vm/vm_extern.h> 98 #include <vm/pmap.h> 99 #include <vm/vm_map.h> 100 #include <vm/vm_page.h> 101 #include <vm/vm_param.h> 102 #include <vm/vm_object.h> 103 #include <vm/vm_pager.h> 104 #include <vm/vnode_pager.h> 105 #include <vm/vm_object.h> 106 107 #include "fuse.h" 108 #include "fuse_file.h" 109 #include "fuse_internal.h" 110 #include "fuse_ipc.h" 111 #include "fuse_node.h" 112 #include "fuse_io.h" 113 114 #include <sys/priv.h> 115 116 /* Maximum number of hardlinks to a single FUSE file */ 117 #define FUSE_LINK_MAX UINT32_MAX 118 119 SDT_PROVIDER_DECLARE(fusefs); 120 /* 121 * Fuse trace probe: 122 * arg0: verbosity. Higher numbers give more verbose messages 123 * arg1: Textual message 124 */ 125 SDT_PROBE_DEFINE2(fusefs, , vnops, trace, "int", "char*"); 126 127 /* vnode ops */ 128 static vop_access_t fuse_vnop_access; 129 static vop_advlock_t fuse_vnop_advlock; 130 static vop_bmap_t fuse_vnop_bmap; 131 static vop_close_t fuse_fifo_close; 132 static vop_close_t fuse_vnop_close; 133 static vop_copy_file_range_t fuse_vnop_copy_file_range; 134 static vop_create_t fuse_vnop_create; 135 static vop_deleteextattr_t fuse_vnop_deleteextattr; 136 static vop_fdatasync_t fuse_vnop_fdatasync; 137 static vop_fsync_t fuse_vnop_fsync; 138 static vop_getattr_t fuse_vnop_getattr; 139 static vop_getextattr_t fuse_vnop_getextattr; 140 static vop_inactive_t fuse_vnop_inactive; 141 static vop_ioctl_t fuse_vnop_ioctl; 142 static vop_link_t fuse_vnop_link; 143 static vop_listextattr_t fuse_vnop_listextattr; 144 static vop_lookup_t fuse_vnop_lookup; 145 static vop_mkdir_t fuse_vnop_mkdir; 146 static vop_mknod_t fuse_vnop_mknod; 147 static vop_open_t fuse_vnop_open; 148 static vop_pathconf_t fuse_vnop_pathconf; 149 static vop_read_t fuse_vnop_read; 150 static vop_readdir_t fuse_vnop_readdir; 151 static vop_readlink_t fuse_vnop_readlink; 152 static vop_reclaim_t fuse_vnop_reclaim; 153 static vop_remove_t fuse_vnop_remove; 154 static vop_rename_t fuse_vnop_rename; 155 static vop_rmdir_t fuse_vnop_rmdir; 156 static vop_setattr_t fuse_vnop_setattr; 157 static vop_setextattr_t fuse_vnop_setextattr; 158 static vop_strategy_t fuse_vnop_strategy; 159 static vop_symlink_t fuse_vnop_symlink; 160 static vop_write_t fuse_vnop_write; 161 static vop_getpages_t fuse_vnop_getpages; 162 static vop_print_t fuse_vnop_print; 163 static vop_vptofh_t fuse_vnop_vptofh; 164 165 struct vop_vector fuse_fifoops = { 166 .vop_default = &fifo_specops, 167 .vop_access = fuse_vnop_access, 168 .vop_close = fuse_fifo_close, 169 .vop_fsync = fuse_vnop_fsync, 170 .vop_getattr = fuse_vnop_getattr, 171 .vop_inactive = fuse_vnop_inactive, 172 .vop_pathconf = fuse_vnop_pathconf, 173 .vop_print = fuse_vnop_print, 174 .vop_read = VOP_PANIC, 175 .vop_reclaim = fuse_vnop_reclaim, 176 .vop_setattr = fuse_vnop_setattr, 177 .vop_write = VOP_PANIC, 178 .vop_vptofh = fuse_vnop_vptofh, 179 }; 180 VFS_VOP_VECTOR_REGISTER(fuse_fifoops); 181 182 struct vop_vector fuse_vnops = { 183 .vop_allocate = VOP_EINVAL, 184 .vop_default = &default_vnodeops, 185 .vop_access = fuse_vnop_access, 186 .vop_advlock = fuse_vnop_advlock, 187 .vop_bmap = fuse_vnop_bmap, 188 .vop_close = fuse_vnop_close, 189 .vop_copy_file_range = fuse_vnop_copy_file_range, 190 .vop_create = fuse_vnop_create, 191 .vop_deleteextattr = fuse_vnop_deleteextattr, 192 .vop_fsync = fuse_vnop_fsync, 193 .vop_fdatasync = fuse_vnop_fdatasync, 194 .vop_getattr = fuse_vnop_getattr, 195 .vop_getextattr = fuse_vnop_getextattr, 196 .vop_inactive = fuse_vnop_inactive, 197 .vop_ioctl = fuse_vnop_ioctl, 198 .vop_link = fuse_vnop_link, 199 .vop_listextattr = fuse_vnop_listextattr, 200 .vop_lookup = fuse_vnop_lookup, 201 .vop_mkdir = fuse_vnop_mkdir, 202 .vop_mknod = fuse_vnop_mknod, 203 .vop_open = fuse_vnop_open, 204 .vop_pathconf = fuse_vnop_pathconf, 205 /* 206 * TODO: implement vop_poll after upgrading to protocol 7.21. 207 * FUSE_POLL was added in protocol 7.11, but it's kind of broken until 208 * 7.21, which adds the ability for the client to choose which poll 209 * events it wants, and for a client to deregister a file handle 210 */ 211 .vop_read = fuse_vnop_read, 212 .vop_readdir = fuse_vnop_readdir, 213 .vop_readlink = fuse_vnop_readlink, 214 .vop_reclaim = fuse_vnop_reclaim, 215 .vop_remove = fuse_vnop_remove, 216 .vop_rename = fuse_vnop_rename, 217 .vop_rmdir = fuse_vnop_rmdir, 218 .vop_setattr = fuse_vnop_setattr, 219 .vop_setextattr = fuse_vnop_setextattr, 220 .vop_strategy = fuse_vnop_strategy, 221 .vop_symlink = fuse_vnop_symlink, 222 .vop_write = fuse_vnop_write, 223 .vop_getpages = fuse_vnop_getpages, 224 .vop_print = fuse_vnop_print, 225 .vop_vptofh = fuse_vnop_vptofh, 226 }; 227 VFS_VOP_VECTOR_REGISTER(fuse_vnops); 228 229 uma_zone_t fuse_pbuf_zone; 230 231 /* Check permission for extattr operations, much like extattr_check_cred */ 232 static int 233 fuse_extattr_check_cred(struct vnode *vp, int ns, struct ucred *cred, 234 struct thread *td, accmode_t accmode) 235 { 236 struct mount *mp = vnode_mount(vp); 237 struct fuse_data *data = fuse_get_mpdata(mp); 238 int default_permissions = data->dataflags & FSESS_DEFAULT_PERMISSIONS; 239 240 /* 241 * Kernel-invoked always succeeds. 242 */ 243 if (cred == NOCRED) 244 return (0); 245 246 /* 247 * Do not allow privileged processes in jail to directly manipulate 248 * system attributes. 249 */ 250 switch (ns) { 251 case EXTATTR_NAMESPACE_SYSTEM: 252 if (default_permissions) { 253 return (priv_check_cred(cred, PRIV_VFS_EXTATTR_SYSTEM)); 254 } 255 return (0); 256 case EXTATTR_NAMESPACE_USER: 257 if (default_permissions) { 258 return (fuse_internal_access(vp, accmode, td, cred)); 259 } 260 return (0); 261 default: 262 return (EPERM); 263 } 264 } 265 266 /* Get a filehandle for a directory */ 267 static int 268 fuse_filehandle_get_dir(struct vnode *vp, struct fuse_filehandle **fufhp, 269 struct ucred *cred, pid_t pid) 270 { 271 if (fuse_filehandle_get(vp, FREAD, fufhp, cred, pid) == 0) 272 return 0; 273 return fuse_filehandle_get(vp, FEXEC, fufhp, cred, pid); 274 } 275 276 /* Send FUSE_FLUSH for this vnode */ 277 static int 278 fuse_flush(struct vnode *vp, struct ucred *cred, pid_t pid, int fflag) 279 { 280 struct fuse_flush_in *ffi; 281 struct fuse_filehandle *fufh; 282 struct fuse_dispatcher fdi; 283 struct thread *td = curthread; 284 struct mount *mp = vnode_mount(vp); 285 int err; 286 287 if (fsess_not_impl(vnode_mount(vp), FUSE_FLUSH)) 288 return 0; 289 290 err = fuse_filehandle_getrw(vp, fflag, &fufh, cred, pid); 291 if (err) 292 return err; 293 294 fdisp_init(&fdi, sizeof(*ffi)); 295 fdisp_make_vp(&fdi, FUSE_FLUSH, vp, td, cred); 296 ffi = fdi.indata; 297 ffi->fh = fufh->fh_id; 298 /* 299 * If the file has a POSIX lock then we're supposed to set lock_owner. 300 * If not, then lock_owner is undefined. So we may as well always set 301 * it. 302 */ 303 ffi->lock_owner = td->td_proc->p_pid; 304 305 err = fdisp_wait_answ(&fdi); 306 if (err == ENOSYS) { 307 fsess_set_notimpl(mp, FUSE_FLUSH); 308 err = 0; 309 } 310 fdisp_destroy(&fdi); 311 return err; 312 } 313 314 /* Close wrapper for fifos. */ 315 static int 316 fuse_fifo_close(struct vop_close_args *ap) 317 { 318 return (fifo_specops.vop_close(ap)); 319 } 320 321 /* Send FUSE_LSEEK for this node */ 322 static int 323 fuse_vnop_do_lseek(struct vnode *vp, struct thread *td, struct ucred *cred, 324 pid_t pid, off_t *offp, int whence) 325 { 326 struct fuse_dispatcher fdi; 327 struct fuse_filehandle *fufh; 328 struct fuse_lseek_in *flsi; 329 struct fuse_lseek_out *flso; 330 struct mount *mp = vnode_mount(vp); 331 int err; 332 333 ASSERT_VOP_LOCKED(vp, __func__); 334 335 err = fuse_filehandle_getrw(vp, FREAD, &fufh, cred, pid); 336 if (err) 337 return (err); 338 fdisp_init(&fdi, sizeof(*flsi)); 339 fdisp_make_vp(&fdi, FUSE_LSEEK, vp, td, cred); 340 flsi = fdi.indata; 341 flsi->fh = fufh->fh_id; 342 flsi->offset = *offp; 343 flsi->whence = whence; 344 err = fdisp_wait_answ(&fdi); 345 if (err == ENOSYS) { 346 fsess_set_notimpl(mp, FUSE_LSEEK); 347 } else if (err == 0) { 348 fsess_set_impl(mp, FUSE_LSEEK); 349 flso = fdi.answ; 350 *offp = flso->offset; 351 } 352 fdisp_destroy(&fdi); 353 354 return (err); 355 } 356 357 /* 358 struct vnop_access_args { 359 struct vnode *a_vp; 360 #if VOP_ACCESS_TAKES_ACCMODE_T 361 accmode_t a_accmode; 362 #else 363 int a_mode; 364 #endif 365 struct ucred *a_cred; 366 struct thread *a_td; 367 }; 368 */ 369 static int 370 fuse_vnop_access(struct vop_access_args *ap) 371 { 372 struct vnode *vp = ap->a_vp; 373 int accmode = ap->a_accmode; 374 struct ucred *cred = ap->a_cred; 375 376 struct fuse_data *data = fuse_get_mpdata(vnode_mount(vp)); 377 378 int err; 379 380 if (fuse_isdeadfs(vp)) { 381 if (vnode_isvroot(vp)) { 382 return 0; 383 } 384 return ENXIO; 385 } 386 if (!(data->dataflags & FSESS_INITED)) { 387 if (vnode_isvroot(vp)) { 388 if (priv_check_cred(cred, PRIV_VFS_ADMIN) || 389 (fuse_match_cred(data->daemoncred, cred) == 0)) { 390 return 0; 391 } 392 } 393 return EBADF; 394 } 395 if (vnode_islnk(vp)) { 396 return 0; 397 } 398 399 err = fuse_internal_access(vp, accmode, ap->a_td, ap->a_cred); 400 return err; 401 } 402 403 /* 404 * struct vop_advlock_args { 405 * struct vop_generic_args a_gen; 406 * struct vnode *a_vp; 407 * void *a_id; 408 * int a_op; 409 * struct flock *a_fl; 410 * int a_flags; 411 * } 412 */ 413 static int 414 fuse_vnop_advlock(struct vop_advlock_args *ap) 415 { 416 struct vnode *vp = ap->a_vp; 417 struct flock *fl = ap->a_fl; 418 struct thread *td = curthread; 419 struct ucred *cred = td->td_ucred; 420 pid_t pid = td->td_proc->p_pid; 421 struct fuse_filehandle *fufh; 422 struct fuse_dispatcher fdi; 423 struct fuse_lk_in *fli; 424 struct fuse_lk_out *flo; 425 enum fuse_opcode op; 426 int dataflags, err; 427 int flags = ap->a_flags; 428 429 dataflags = fuse_get_mpdata(vnode_mount(vp))->dataflags; 430 431 if (fuse_isdeadfs(vp)) { 432 return ENXIO; 433 } 434 435 switch(ap->a_op) { 436 case F_GETLK: 437 op = FUSE_GETLK; 438 break; 439 case F_SETLK: 440 if (flags & F_WAIT) 441 op = FUSE_SETLKW; 442 else 443 op = FUSE_SETLK; 444 break; 445 case F_UNLCK: 446 op = FUSE_SETLK; 447 break; 448 default: 449 return EINVAL; 450 } 451 452 if (!(dataflags & FSESS_POSIX_LOCKS)) 453 return vop_stdadvlock(ap); 454 /* FUSE doesn't properly support flock until protocol 7.17 */ 455 if (flags & F_FLOCK) 456 return vop_stdadvlock(ap); 457 458 vn_lock(vp, LK_SHARED | LK_RETRY); 459 460 err = fuse_filehandle_get_anyflags(vp, &fufh, cred, pid); 461 if (err) 462 goto out; 463 464 fdisp_init(&fdi, sizeof(*fli)); 465 466 fdisp_make_vp(&fdi, op, vp, td, cred); 467 fli = fdi.indata; 468 fli->fh = fufh->fh_id; 469 fli->owner = td->td_proc->p_pid; 470 fli->lk.start = fl->l_start; 471 if (fl->l_len != 0) 472 fli->lk.end = fl->l_start + fl->l_len - 1; 473 else 474 fli->lk.end = INT64_MAX; 475 fli->lk.type = fl->l_type; 476 fli->lk.pid = td->td_proc->p_pid; 477 478 err = fdisp_wait_answ(&fdi); 479 fdisp_destroy(&fdi); 480 481 if (err == 0 && op == FUSE_GETLK) { 482 flo = fdi.answ; 483 fl->l_type = flo->lk.type; 484 fl->l_pid = flo->lk.pid; 485 if (flo->lk.type != F_UNLCK) { 486 fl->l_start = flo->lk.start; 487 if (flo->lk.end == INT64_MAX) 488 fl->l_len = 0; 489 else 490 fl->l_len = flo->lk.end - flo->lk.start + 1; 491 fl->l_start = flo->lk.start; 492 } 493 } 494 495 out: 496 VOP_UNLOCK(vp); 497 return err; 498 } 499 500 /* { 501 struct vnode *a_vp; 502 daddr_t a_bn; 503 struct bufobj **a_bop; 504 daddr_t *a_bnp; 505 int *a_runp; 506 int *a_runb; 507 } */ 508 static int 509 fuse_vnop_bmap(struct vop_bmap_args *ap) 510 { 511 struct vnode *vp = ap->a_vp; 512 struct bufobj **bo = ap->a_bop; 513 struct thread *td = curthread; 514 struct mount *mp; 515 struct fuse_dispatcher fdi; 516 struct fuse_bmap_in *fbi; 517 struct fuse_bmap_out *fbo; 518 struct fuse_data *data; 519 struct fuse_vnode_data *fvdat = VTOFUD(vp); 520 uint64_t biosize; 521 off_t fsize; 522 daddr_t lbn = ap->a_bn; 523 daddr_t *pbn = ap->a_bnp; 524 int *runp = ap->a_runp; 525 int *runb = ap->a_runb; 526 int error = 0; 527 int maxrun; 528 529 if (fuse_isdeadfs(vp)) { 530 return ENXIO; 531 } 532 533 mp = vnode_mount(vp); 534 data = fuse_get_mpdata(mp); 535 biosize = fuse_iosize(vp); 536 maxrun = MIN(vp->v_mount->mnt_iosize_max / biosize - 1, 537 data->max_readahead_blocks); 538 539 if (bo != NULL) 540 *bo = &vp->v_bufobj; 541 542 /* 543 * The FUSE_BMAP operation does not include the runp and runb 544 * variables, so we must guess. Report nonzero contiguous runs so 545 * cluster_read will combine adjacent reads. It's worthwhile to reduce 546 * upcalls even if we don't know the true physical layout of the file. 547 * 548 * FUSE file systems may opt out of read clustering in two ways: 549 * * mounting with -onoclusterr 550 * * Setting max_readahead <= maxbcachebuf during FUSE_INIT 551 */ 552 if (runb != NULL) 553 *runb = MIN(lbn, maxrun); 554 if (runp != NULL && maxrun == 0) 555 *runp = 0; 556 else if (runp != NULL) { 557 /* 558 * If the file's size is cached, use that value to calculate 559 * runp, even if the cache is expired. runp is only advisory, 560 * and the risk of getting it wrong is not worth the cost of 561 * another upcall. 562 */ 563 if (fvdat->cached_attrs.va_size != VNOVAL) 564 fsize = fvdat->cached_attrs.va_size; 565 else 566 error = fuse_vnode_size(vp, &fsize, td->td_ucred, td); 567 if (error == 0) 568 *runp = MIN(MAX(0, fsize / (off_t)biosize - lbn - 1), 569 maxrun); 570 else 571 *runp = 0; 572 } 573 574 if (fsess_maybe_impl(mp, FUSE_BMAP)) { 575 fdisp_init(&fdi, sizeof(*fbi)); 576 fdisp_make_vp(&fdi, FUSE_BMAP, vp, td, td->td_ucred); 577 fbi = fdi.indata; 578 fbi->block = lbn; 579 fbi->blocksize = biosize; 580 error = fdisp_wait_answ(&fdi); 581 if (error == ENOSYS) { 582 fdisp_destroy(&fdi); 583 fsess_set_notimpl(mp, FUSE_BMAP); 584 error = 0; 585 } else { 586 fbo = fdi.answ; 587 if (error == 0 && pbn != NULL) 588 *pbn = fbo->block; 589 fdisp_destroy(&fdi); 590 return error; 591 } 592 } 593 594 /* If the daemon doesn't support BMAP, make up a sensible default */ 595 if (pbn != NULL) 596 *pbn = lbn * btodb(biosize); 597 return (error); 598 } 599 600 /* 601 struct vop_close_args { 602 struct vnode *a_vp; 603 int a_fflag; 604 struct ucred *a_cred; 605 struct thread *a_td; 606 }; 607 */ 608 static int 609 fuse_vnop_close(struct vop_close_args *ap) 610 { 611 struct vnode *vp = ap->a_vp; 612 struct ucred *cred = ap->a_cred; 613 int fflag = ap->a_fflag; 614 struct thread *td = ap->a_td; 615 pid_t pid = td->td_proc->p_pid; 616 int err = 0; 617 618 if (fuse_isdeadfs(vp)) 619 return 0; 620 if (vnode_isdir(vp)) 621 return 0; 622 if (fflag & IO_NDELAY) 623 return 0; 624 625 err = fuse_flush(vp, cred, pid, fflag); 626 /* TODO: close the file handle, if we're sure it's no longer used */ 627 if ((VTOFUD(vp)->flag & FN_SIZECHANGE) != 0) { 628 fuse_vnode_savesize(vp, cred, td->td_proc->p_pid); 629 } 630 return err; 631 } 632 633 /* 634 struct vop_copy_file_range_args { 635 struct vop_generic_args a_gen; 636 struct vnode *a_invp; 637 off_t *a_inoffp; 638 struct vnode *a_outvp; 639 off_t *a_outoffp; 640 size_t *a_lenp; 641 unsigned int a_flags; 642 struct ucred *a_incred; 643 struct ucred *a_outcred; 644 struct thread *a_fsizetd; 645 } 646 */ 647 static int 648 fuse_vnop_copy_file_range(struct vop_copy_file_range_args *ap) 649 { 650 struct vnode *invp = ap->a_invp; 651 struct vnode *outvp = ap->a_outvp; 652 struct mount *mp = vnode_mount(invp); 653 struct fuse_dispatcher fdi; 654 struct fuse_filehandle *infufh, *outfufh; 655 struct fuse_copy_file_range_in *fcfri; 656 struct ucred *incred = ap->a_incred; 657 struct ucred *outcred = ap->a_outcred; 658 struct fuse_write_out *fwo; 659 struct thread *td; 660 struct uio io; 661 pid_t pid; 662 int err; 663 664 if (mp != vnode_mount(outvp)) 665 goto fallback; 666 667 if (incred->cr_uid != outcred->cr_uid) 668 goto fallback; 669 670 if (incred->cr_groups[0] != outcred->cr_groups[0]) 671 goto fallback; 672 673 if (fsess_not_impl(mp, FUSE_COPY_FILE_RANGE)) 674 goto fallback; 675 676 if (ap->a_fsizetd == NULL) 677 td = curthread; 678 else 679 td = ap->a_fsizetd; 680 pid = td->td_proc->p_pid; 681 682 /* Lock both vnodes, avoiding risk of deadlock. */ 683 do { 684 err = vn_lock(outvp, LK_EXCLUSIVE); 685 if (invp == outvp) 686 break; 687 if (err == 0) { 688 err = vn_lock(invp, LK_SHARED | LK_NOWAIT); 689 if (err == 0) 690 break; 691 VOP_UNLOCK(outvp); 692 err = vn_lock(invp, LK_SHARED); 693 if (err == 0) 694 VOP_UNLOCK(invp); 695 } 696 } while (err == 0); 697 if (err != 0) 698 return (err); 699 700 err = fuse_filehandle_getrw(invp, FREAD, &infufh, incred, pid); 701 if (err) 702 goto unlock; 703 704 err = fuse_filehandle_getrw(outvp, FWRITE, &outfufh, outcred, pid); 705 if (err) 706 goto unlock; 707 708 if (ap->a_fsizetd) { 709 io.uio_offset = *ap->a_outoffp; 710 io.uio_resid = *ap->a_lenp; 711 err = vn_rlimit_fsize(outvp, &io, ap->a_fsizetd); 712 if (err) 713 goto unlock; 714 } 715 716 fdisp_init(&fdi, sizeof(*fcfri)); 717 fdisp_make_vp(&fdi, FUSE_COPY_FILE_RANGE, invp, td, incred); 718 fcfri = fdi.indata; 719 fcfri->fh_in = infufh->fh_id; 720 fcfri->off_in = *ap->a_inoffp; 721 fcfri->nodeid_out = VTOI(outvp); 722 fcfri->fh_out = outfufh->fh_id; 723 fcfri->off_out = *ap->a_outoffp; 724 fcfri->len = *ap->a_lenp; 725 fcfri->flags = 0; 726 727 err = fdisp_wait_answ(&fdi); 728 if (err == 0) { 729 fwo = fdi.answ; 730 *ap->a_lenp = fwo->size; 731 *ap->a_inoffp += fwo->size; 732 *ap->a_outoffp += fwo->size; 733 fuse_internal_clear_suid_on_write(outvp, outcred, td); 734 } 735 fdisp_destroy(&fdi); 736 737 unlock: 738 if (invp != outvp) 739 VOP_UNLOCK(invp); 740 VOP_UNLOCK(outvp); 741 742 if (err == ENOSYS) { 743 fsess_set_notimpl(mp, FUSE_COPY_FILE_RANGE); 744 fallback: 745 err = vn_generic_copy_file_range(ap->a_invp, ap->a_inoffp, 746 ap->a_outvp, ap->a_outoffp, ap->a_lenp, ap->a_flags, 747 ap->a_incred, ap->a_outcred, ap->a_fsizetd); 748 } 749 750 return (err); 751 } 752 753 static void 754 fdisp_make_mknod_for_fallback( 755 struct fuse_dispatcher *fdip, 756 struct componentname *cnp, 757 struct vnode *dvp, 758 uint64_t parentnid, 759 struct thread *td, 760 struct ucred *cred, 761 mode_t mode, 762 enum fuse_opcode *op) 763 { 764 struct fuse_mknod_in *fmni; 765 766 fdisp_init(fdip, sizeof(*fmni) + cnp->cn_namelen + 1); 767 *op = FUSE_MKNOD; 768 fdisp_make(fdip, *op, vnode_mount(dvp), parentnid, td, cred); 769 fmni = fdip->indata; 770 fmni->mode = mode; 771 fmni->rdev = 0; 772 memcpy((char *)fdip->indata + sizeof(*fmni), cnp->cn_nameptr, 773 cnp->cn_namelen); 774 ((char *)fdip->indata)[sizeof(*fmni) + cnp->cn_namelen] = '\0'; 775 } 776 /* 777 struct vnop_create_args { 778 struct vnode *a_dvp; 779 struct vnode **a_vpp; 780 struct componentname *a_cnp; 781 struct vattr *a_vap; 782 }; 783 */ 784 static int 785 fuse_vnop_create(struct vop_create_args *ap) 786 { 787 struct vnode *dvp = ap->a_dvp; 788 struct vnode **vpp = ap->a_vpp; 789 struct componentname *cnp = ap->a_cnp; 790 struct vattr *vap = ap->a_vap; 791 struct thread *td = curthread; 792 struct ucred *cred = cnp->cn_cred; 793 794 struct fuse_data *data; 795 struct fuse_create_in *fci; 796 struct fuse_entry_out *feo; 797 struct fuse_open_out *foo; 798 struct fuse_dispatcher fdi, fdi2; 799 struct fuse_dispatcher *fdip = &fdi; 800 struct fuse_dispatcher *fdip2 = NULL; 801 802 int err; 803 804 struct mount *mp = vnode_mount(dvp); 805 data = fuse_get_mpdata(mp); 806 uint64_t parentnid = VTOFUD(dvp)->nid; 807 mode_t mode = MAKEIMODE(vap->va_type, vap->va_mode); 808 enum fuse_opcode op; 809 int flags; 810 811 if (fuse_isdeadfs(dvp)) 812 return ENXIO; 813 814 /* FUSE expects sockets to be created with FUSE_MKNOD */ 815 if (vap->va_type == VSOCK) 816 return fuse_internal_mknod(dvp, vpp, cnp, vap); 817 818 /* 819 * VOP_CREATE doesn't tell us the open(2) flags, so we guess. Only a 820 * writable mode makes sense, and we might as well include readability 821 * too. 822 */ 823 flags = O_RDWR; 824 825 bzero(&fdi, sizeof(fdi)); 826 827 if (vap->va_type != VREG) 828 return (EINVAL); 829 830 if (fsess_not_impl(mp, FUSE_CREATE) || vap->va_type == VSOCK) { 831 /* Fallback to FUSE_MKNOD/FUSE_OPEN */ 832 fdisp_make_mknod_for_fallback(fdip, cnp, dvp, parentnid, td, 833 cred, mode, &op); 834 } else { 835 /* Use FUSE_CREATE */ 836 size_t insize; 837 838 op = FUSE_CREATE; 839 fdisp_init(fdip, sizeof(*fci) + cnp->cn_namelen + 1); 840 fdisp_make(fdip, op, vnode_mount(dvp), parentnid, td, cred); 841 fci = fdip->indata; 842 fci->mode = mode; 843 fci->flags = O_CREAT | flags; 844 if (fuse_libabi_geq(data, 7, 12)) { 845 insize = sizeof(*fci); 846 fci->umask = td->td_proc->p_pd->pd_cmask; 847 } else { 848 insize = sizeof(struct fuse_open_in); 849 } 850 851 memcpy((char *)fdip->indata + insize, cnp->cn_nameptr, 852 cnp->cn_namelen); 853 ((char *)fdip->indata)[insize + cnp->cn_namelen] = '\0'; 854 } 855 856 err = fdisp_wait_answ(fdip); 857 858 if (err) { 859 if (err == ENOSYS && op == FUSE_CREATE) { 860 fsess_set_notimpl(mp, FUSE_CREATE); 861 fdisp_destroy(fdip); 862 fdisp_make_mknod_for_fallback(fdip, cnp, dvp, 863 parentnid, td, cred, mode, &op); 864 err = fdisp_wait_answ(fdip); 865 } 866 if (err) 867 goto out; 868 } 869 870 feo = fdip->answ; 871 872 if ((err = fuse_internal_checkentry(feo, vap->va_type))) { 873 goto out; 874 } 875 876 if (op == FUSE_CREATE) { 877 foo = (struct fuse_open_out*)(feo + 1); 878 } else { 879 /* Issue a separate FUSE_OPEN */ 880 struct fuse_open_in *foi; 881 882 fdip2 = &fdi2; 883 fdisp_init(fdip2, sizeof(*foi)); 884 fdisp_make(fdip2, FUSE_OPEN, vnode_mount(dvp), feo->nodeid, td, 885 cred); 886 foi = fdip2->indata; 887 foi->flags = flags; 888 err = fdisp_wait_answ(fdip2); 889 if (err) 890 goto out; 891 foo = fdip2->answ; 892 } 893 err = fuse_vnode_get(mp, feo, feo->nodeid, dvp, vpp, cnp, vap->va_type); 894 if (err) { 895 struct fuse_release_in *fri; 896 uint64_t nodeid = feo->nodeid; 897 uint64_t fh_id = foo->fh; 898 899 fdisp_init(fdip, sizeof(*fri)); 900 fdisp_make(fdip, FUSE_RELEASE, mp, nodeid, td, cred); 901 fri = fdip->indata; 902 fri->fh = fh_id; 903 fri->flags = flags; 904 fuse_insert_callback(fdip->tick, fuse_internal_forget_callback); 905 fuse_insert_message(fdip->tick, false); 906 goto out; 907 } 908 ASSERT_VOP_ELOCKED(*vpp, "fuse_vnop_create"); 909 fuse_internal_cache_attrs(*vpp, &feo->attr, feo->attr_valid, 910 feo->attr_valid_nsec, NULL, true); 911 912 fuse_filehandle_init(*vpp, FUFH_RDWR, NULL, td, cred, foo); 913 fuse_vnode_open(*vpp, foo->open_flags, td); 914 /* 915 * Purge the parent's attribute cache because the daemon should've 916 * updated its mtime and ctime 917 */ 918 fuse_vnode_clear_attr_cache(dvp); 919 cache_purge_negative(dvp); 920 921 out: 922 if (fdip2) 923 fdisp_destroy(fdip2); 924 fdisp_destroy(fdip); 925 return err; 926 } 927 928 /* 929 struct vnop_fdatasync_args { 930 struct vop_generic_args a_gen; 931 struct vnode * a_vp; 932 struct thread * a_td; 933 }; 934 */ 935 static int 936 fuse_vnop_fdatasync(struct vop_fdatasync_args *ap) 937 { 938 struct vnode *vp = ap->a_vp; 939 struct thread *td = ap->a_td; 940 int waitfor = MNT_WAIT; 941 942 int err = 0; 943 944 if (fuse_isdeadfs(vp)) { 945 return 0; 946 } 947 if ((err = vop_stdfdatasync_buf(ap))) 948 return err; 949 950 return fuse_internal_fsync(vp, td, waitfor, true); 951 } 952 953 /* 954 struct vnop_fsync_args { 955 struct vop_generic_args a_gen; 956 struct vnode * a_vp; 957 int a_waitfor; 958 struct thread * a_td; 959 }; 960 */ 961 static int 962 fuse_vnop_fsync(struct vop_fsync_args *ap) 963 { 964 struct vnode *vp = ap->a_vp; 965 struct thread *td = ap->a_td; 966 int waitfor = ap->a_waitfor; 967 int err = 0; 968 969 if (fuse_isdeadfs(vp)) { 970 return 0; 971 } 972 if ((err = vop_stdfsync(ap))) 973 return err; 974 975 return fuse_internal_fsync(vp, td, waitfor, false); 976 } 977 978 /* 979 struct vnop_getattr_args { 980 struct vnode *a_vp; 981 struct vattr *a_vap; 982 struct ucred *a_cred; 983 struct thread *a_td; 984 }; 985 */ 986 static int 987 fuse_vnop_getattr(struct vop_getattr_args *ap) 988 { 989 struct vnode *vp = ap->a_vp; 990 struct vattr *vap = ap->a_vap; 991 struct ucred *cred = ap->a_cred; 992 struct thread *td = curthread; 993 994 int err = 0; 995 int dataflags; 996 997 dataflags = fuse_get_mpdata(vnode_mount(vp))->dataflags; 998 999 /* Note that we are not bailing out on a dead file system just yet. */ 1000 1001 if (!(dataflags & FSESS_INITED)) { 1002 if (!vnode_isvroot(vp)) { 1003 fdata_set_dead(fuse_get_mpdata(vnode_mount(vp))); 1004 err = ENOTCONN; 1005 return err; 1006 } else { 1007 goto fake; 1008 } 1009 } 1010 err = fuse_internal_getattr(vp, vap, cred, td); 1011 if (err == ENOTCONN && vnode_isvroot(vp)) { 1012 /* see comment in fuse_vfsop_statfs() */ 1013 goto fake; 1014 } else { 1015 return err; 1016 } 1017 1018 fake: 1019 bzero(vap, sizeof(*vap)); 1020 vap->va_type = vnode_vtype(vp); 1021 1022 return 0; 1023 } 1024 1025 /* 1026 struct vnop_inactive_args { 1027 struct vnode *a_vp; 1028 }; 1029 */ 1030 static int 1031 fuse_vnop_inactive(struct vop_inactive_args *ap) 1032 { 1033 struct vnode *vp = ap->a_vp; 1034 struct thread *td = curthread; 1035 1036 struct fuse_vnode_data *fvdat = VTOFUD(vp); 1037 struct fuse_filehandle *fufh, *fufh_tmp; 1038 1039 int need_flush = 1; 1040 1041 LIST_FOREACH_SAFE(fufh, &fvdat->handles, next, fufh_tmp) { 1042 if (need_flush && vp->v_type == VREG) { 1043 if ((VTOFUD(vp)->flag & FN_SIZECHANGE) != 0) { 1044 fuse_vnode_savesize(vp, NULL, 0); 1045 } 1046 if ((fvdat->flag & FN_REVOKED) != 0) 1047 fuse_io_invalbuf(vp, td); 1048 else 1049 fuse_io_flushbuf(vp, MNT_WAIT, td); 1050 need_flush = 0; 1051 } 1052 fuse_filehandle_close(vp, fufh, td, NULL); 1053 } 1054 1055 if ((fvdat->flag & FN_REVOKED) != 0) 1056 vrecycle(vp); 1057 1058 return 0; 1059 } 1060 1061 /* 1062 struct vnop_ioctl_args { 1063 struct vnode *a_vp; 1064 u_long a_command; 1065 caddr_t a_data; 1066 int a_fflag; 1067 struct ucred *a_cred; 1068 struct thread *a_td; 1069 }; 1070 */ 1071 static int 1072 fuse_vnop_ioctl(struct vop_ioctl_args *ap) 1073 { 1074 struct vnode *vp = ap->a_vp; 1075 struct mount *mp = vnode_mount(vp); 1076 struct ucred *cred = ap->a_cred; 1077 off_t *offp; 1078 pid_t pid = ap->a_td->td_proc->p_pid; 1079 int err; 1080 1081 switch (ap->a_command) { 1082 case FIOSEEKDATA: 1083 case FIOSEEKHOLE: 1084 /* Call FUSE_LSEEK, if we can, or fall back to vop_stdioctl */ 1085 if (fsess_maybe_impl(mp, FUSE_LSEEK)) { 1086 int whence; 1087 1088 offp = ap->a_data; 1089 if (ap->a_command == FIOSEEKDATA) 1090 whence = SEEK_DATA; 1091 else 1092 whence = SEEK_HOLE; 1093 1094 vn_lock(vp, LK_SHARED | LK_RETRY); 1095 err = fuse_vnop_do_lseek(vp, ap->a_td, cred, pid, offp, 1096 whence); 1097 VOP_UNLOCK(vp); 1098 } 1099 if (fsess_not_impl(mp, FUSE_LSEEK)) 1100 err = vop_stdioctl(ap); 1101 break; 1102 default: 1103 /* TODO: implement FUSE_IOCTL */ 1104 err = ENOTTY; 1105 break; 1106 } 1107 return (err); 1108 } 1109 1110 1111 /* 1112 struct vnop_link_args { 1113 struct vnode *a_tdvp; 1114 struct vnode *a_vp; 1115 struct componentname *a_cnp; 1116 }; 1117 */ 1118 static int 1119 fuse_vnop_link(struct vop_link_args *ap) 1120 { 1121 struct vnode *vp = ap->a_vp; 1122 struct vnode *tdvp = ap->a_tdvp; 1123 struct componentname *cnp = ap->a_cnp; 1124 1125 struct vattr *vap = VTOVA(vp); 1126 1127 struct fuse_dispatcher fdi; 1128 struct fuse_entry_out *feo; 1129 struct fuse_link_in fli; 1130 1131 int err; 1132 1133 if (fuse_isdeadfs(vp)) { 1134 return ENXIO; 1135 } 1136 if (vnode_mount(tdvp) != vnode_mount(vp)) { 1137 return EXDEV; 1138 } 1139 1140 /* 1141 * This is a seatbelt check to protect naive userspace filesystems from 1142 * themselves and the limitations of the FUSE IPC protocol. If a 1143 * filesystem does not allow attribute caching, assume it is capable of 1144 * validating that nlink does not overflow. 1145 */ 1146 if (vap != NULL && vap->va_nlink >= FUSE_LINK_MAX) 1147 return EMLINK; 1148 fli.oldnodeid = VTOI(vp); 1149 1150 fdisp_init(&fdi, 0); 1151 fuse_internal_newentry_makerequest(vnode_mount(tdvp), VTOI(tdvp), cnp, 1152 FUSE_LINK, &fli, sizeof(fli), &fdi); 1153 if ((err = fdisp_wait_answ(&fdi))) { 1154 goto out; 1155 } 1156 feo = fdi.answ; 1157 1158 err = fuse_internal_checkentry(feo, vnode_vtype(vp)); 1159 if (!err) { 1160 /* 1161 * Purge the parent's attribute cache because the daemon 1162 * should've updated its mtime and ctime 1163 */ 1164 fuse_vnode_clear_attr_cache(tdvp); 1165 fuse_internal_cache_attrs(vp, &feo->attr, feo->attr_valid, 1166 feo->attr_valid_nsec, NULL, true); 1167 } 1168 out: 1169 fdisp_destroy(&fdi); 1170 return err; 1171 } 1172 1173 struct fuse_lookup_alloc_arg { 1174 struct fuse_entry_out *feo; 1175 struct componentname *cnp; 1176 uint64_t nid; 1177 enum vtype vtyp; 1178 }; 1179 1180 /* Callback for vn_get_ino */ 1181 static int 1182 fuse_lookup_alloc(struct mount *mp, void *arg, int lkflags, struct vnode **vpp) 1183 { 1184 struct fuse_lookup_alloc_arg *flaa = arg; 1185 1186 return fuse_vnode_get(mp, flaa->feo, flaa->nid, NULL, vpp, flaa->cnp, 1187 flaa->vtyp); 1188 } 1189 1190 SDT_PROBE_DEFINE3(fusefs, , vnops, cache_lookup, 1191 "int", "struct timespec*", "struct timespec*"); 1192 /* 1193 struct vnop_lookup_args { 1194 struct vnodeop_desc *a_desc; 1195 struct vnode *a_dvp; 1196 struct vnode **a_vpp; 1197 struct componentname *a_cnp; 1198 }; 1199 */ 1200 int 1201 fuse_vnop_lookup(struct vop_lookup_args *ap) 1202 { 1203 struct vnode *dvp = ap->a_dvp; 1204 struct vnode **vpp = ap->a_vpp; 1205 struct componentname *cnp = ap->a_cnp; 1206 struct thread *td = curthread; 1207 struct ucred *cred = cnp->cn_cred; 1208 1209 int nameiop = cnp->cn_nameiop; 1210 int flags = cnp->cn_flags; 1211 int wantparent = flags & (LOCKPARENT | WANTPARENT); 1212 int islastcn = flags & ISLASTCN; 1213 struct mount *mp = vnode_mount(dvp); 1214 struct fuse_data *data = fuse_get_mpdata(mp); 1215 int default_permissions = data->dataflags & FSESS_DEFAULT_PERMISSIONS; 1216 1217 int err = 0; 1218 int lookup_err = 0; 1219 struct vnode *vp = NULL; 1220 1221 struct fuse_dispatcher fdi; 1222 bool did_lookup = false; 1223 struct fuse_entry_out *feo = NULL; 1224 enum vtype vtyp; /* vnode type of target */ 1225 off_t filesize; /* filesize of target */ 1226 1227 uint64_t nid; 1228 1229 if (fuse_isdeadfs(dvp)) { 1230 *vpp = NULL; 1231 return ENXIO; 1232 } 1233 if (!vnode_isdir(dvp)) 1234 return ENOTDIR; 1235 1236 if (islastcn && vfs_isrdonly(mp) && (nameiop != LOOKUP)) 1237 return EROFS; 1238 1239 if ((cnp->cn_flags & NOEXECCHECK) != 0) 1240 cnp->cn_flags &= ~NOEXECCHECK; 1241 else if ((err = fuse_internal_access(dvp, VEXEC, td, cred))) 1242 return err; 1243 1244 if (flags & ISDOTDOT) { 1245 KASSERT(VTOFUD(dvp)->flag & FN_PARENT_NID, 1246 ("Looking up .. is TODO")); 1247 nid = VTOFUD(dvp)->parent_nid; 1248 if (nid == 0) 1249 return ENOENT; 1250 /* .. is obviously a directory */ 1251 vtyp = VDIR; 1252 filesize = 0; 1253 } else if (cnp->cn_namelen == 1 && *(cnp->cn_nameptr) == '.') { 1254 nid = VTOI(dvp); 1255 /* . is obviously a directory */ 1256 vtyp = VDIR; 1257 filesize = 0; 1258 } else { 1259 struct timespec now, timeout; 1260 int ncpticks; /* here to accomodate for API contract */ 1261 1262 err = cache_lookup(dvp, vpp, cnp, &timeout, &ncpticks); 1263 getnanouptime(&now); 1264 SDT_PROBE3(fusefs, , vnops, cache_lookup, err, &timeout, &now); 1265 switch (err) { 1266 case -1: /* positive match */ 1267 if (timespeccmp(&timeout, &now, >)) { 1268 counter_u64_add(fuse_lookup_cache_hits, 1); 1269 } else { 1270 /* Cache timeout */ 1271 counter_u64_add(fuse_lookup_cache_misses, 1); 1272 bintime_clear( 1273 &VTOFUD(*vpp)->entry_cache_timeout); 1274 cache_purge(*vpp); 1275 if (dvp != *vpp) 1276 vput(*vpp); 1277 else 1278 vrele(*vpp); 1279 *vpp = NULL; 1280 break; 1281 } 1282 return 0; 1283 1284 case 0: /* no match in cache */ 1285 counter_u64_add(fuse_lookup_cache_misses, 1); 1286 break; 1287 1288 case ENOENT: /* negative match */ 1289 getnanouptime(&now); 1290 if (timespeccmp(&timeout, &now, <=)) { 1291 /* Cache timeout */ 1292 cache_purge_negative(dvp); 1293 break; 1294 } 1295 /* fall through */ 1296 default: 1297 return err; 1298 } 1299 1300 nid = VTOI(dvp); 1301 fdisp_init(&fdi, cnp->cn_namelen + 1); 1302 fdisp_make(&fdi, FUSE_LOOKUP, mp, nid, td, cred); 1303 1304 memcpy(fdi.indata, cnp->cn_nameptr, cnp->cn_namelen); 1305 ((char *)fdi.indata)[cnp->cn_namelen] = '\0'; 1306 lookup_err = fdisp_wait_answ(&fdi); 1307 did_lookup = true; 1308 1309 if (!lookup_err) { 1310 /* lookup call succeeded */ 1311 feo = (struct fuse_entry_out *)fdi.answ; 1312 nid = feo->nodeid; 1313 if (nid == 0) { 1314 /* zero nodeid means ENOENT and cache it */ 1315 struct timespec timeout; 1316 1317 fdi.answ_stat = ENOENT; 1318 lookup_err = ENOENT; 1319 if (cnp->cn_flags & MAKEENTRY) { 1320 fuse_validity_2_timespec(feo, &timeout); 1321 cache_enter_time(dvp, *vpp, cnp, 1322 &timeout, NULL); 1323 } 1324 } else if (nid == FUSE_ROOT_ID) { 1325 lookup_err = EINVAL; 1326 } 1327 vtyp = IFTOVT(feo->attr.mode); 1328 filesize = feo->attr.size; 1329 } 1330 if (lookup_err && (!fdi.answ_stat || lookup_err != ENOENT)) { 1331 fdisp_destroy(&fdi); 1332 return lookup_err; 1333 } 1334 } 1335 /* lookup_err, if non-zero, must be ENOENT at this point */ 1336 1337 if (lookup_err) { 1338 /* Entry not found */ 1339 if ((nameiop == CREATE || nameiop == RENAME) && islastcn) { 1340 if (default_permissions) 1341 err = fuse_internal_access(dvp, VWRITE, td, 1342 cred); 1343 else 1344 err = 0; 1345 if (!err) { 1346 /* 1347 * Set the SAVENAME flag to hold onto the 1348 * pathname for use later in VOP_CREATE or 1349 * VOP_RENAME. 1350 */ 1351 cnp->cn_flags |= SAVENAME; 1352 1353 err = EJUSTRETURN; 1354 } 1355 } else { 1356 err = ENOENT; 1357 } 1358 } else { 1359 /* Entry was found */ 1360 if (flags & ISDOTDOT) { 1361 struct fuse_lookup_alloc_arg flaa; 1362 1363 flaa.nid = nid; 1364 flaa.feo = feo; 1365 flaa.cnp = cnp; 1366 flaa.vtyp = vtyp; 1367 err = vn_vget_ino_gen(dvp, fuse_lookup_alloc, &flaa, 0, 1368 &vp); 1369 *vpp = vp; 1370 } else if (nid == VTOI(dvp)) { 1371 vref(dvp); 1372 *vpp = dvp; 1373 } else { 1374 struct fuse_vnode_data *fvdat; 1375 1376 err = fuse_vnode_get(vnode_mount(dvp), feo, nid, dvp, 1377 &vp, cnp, vtyp); 1378 if (err) 1379 goto out; 1380 *vpp = vp; 1381 fvdat = VTOFUD(vp); 1382 1383 MPASS(feo != NULL); 1384 fuse_internal_cache_attrs(*vpp, &feo->attr, 1385 feo->attr_valid, feo->attr_valid_nsec, NULL, true); 1386 fuse_validity_2_bintime(feo->entry_valid, 1387 feo->entry_valid_nsec, 1388 &fvdat->entry_cache_timeout); 1389 1390 if ((nameiop == DELETE || nameiop == RENAME) && 1391 islastcn && default_permissions) 1392 { 1393 struct vattr dvattr; 1394 1395 err = fuse_internal_access(dvp, VWRITE, td, 1396 cred); 1397 if (err != 0) 1398 goto out; 1399 /* 1400 * if the parent's sticky bit is set, check 1401 * whether we're allowed to remove the file. 1402 * Need to figure out the vnode locking to make 1403 * this work. 1404 */ 1405 fuse_internal_getattr(dvp, &dvattr, cred, td); 1406 if ((dvattr.va_mode & S_ISTXT) && 1407 fuse_internal_access(dvp, VADMIN, td, 1408 cred) && 1409 fuse_internal_access(*vpp, VADMIN, td, 1410 cred)) { 1411 err = EPERM; 1412 goto out; 1413 } 1414 } 1415 1416 if (islastcn && ( 1417 (nameiop == DELETE) || 1418 (nameiop == RENAME && wantparent))) { 1419 cnp->cn_flags |= SAVENAME; 1420 } 1421 } 1422 } 1423 out: 1424 if (err) { 1425 if (vp != NULL && dvp != vp) 1426 vput(vp); 1427 else if (vp != NULL) 1428 vrele(vp); 1429 *vpp = NULL; 1430 } 1431 if (did_lookup) 1432 fdisp_destroy(&fdi); 1433 1434 return err; 1435 } 1436 1437 /* 1438 struct vnop_mkdir_args { 1439 struct vnode *a_dvp; 1440 struct vnode **a_vpp; 1441 struct componentname *a_cnp; 1442 struct vattr *a_vap; 1443 }; 1444 */ 1445 static int 1446 fuse_vnop_mkdir(struct vop_mkdir_args *ap) 1447 { 1448 struct vnode *dvp = ap->a_dvp; 1449 struct vnode **vpp = ap->a_vpp; 1450 struct componentname *cnp = ap->a_cnp; 1451 struct vattr *vap = ap->a_vap; 1452 1453 struct fuse_mkdir_in fmdi; 1454 1455 if (fuse_isdeadfs(dvp)) { 1456 return ENXIO; 1457 } 1458 fmdi.mode = MAKEIMODE(vap->va_type, vap->va_mode); 1459 fmdi.umask = curthread->td_proc->p_pd->pd_cmask; 1460 1461 return (fuse_internal_newentry(dvp, vpp, cnp, FUSE_MKDIR, &fmdi, 1462 sizeof(fmdi), VDIR)); 1463 } 1464 1465 /* 1466 struct vnop_mknod_args { 1467 struct vnode *a_dvp; 1468 struct vnode **a_vpp; 1469 struct componentname *a_cnp; 1470 struct vattr *a_vap; 1471 }; 1472 */ 1473 static int 1474 fuse_vnop_mknod(struct vop_mknod_args *ap) 1475 { 1476 1477 struct vnode *dvp = ap->a_dvp; 1478 struct vnode **vpp = ap->a_vpp; 1479 struct componentname *cnp = ap->a_cnp; 1480 struct vattr *vap = ap->a_vap; 1481 1482 if (fuse_isdeadfs(dvp)) 1483 return ENXIO; 1484 1485 return fuse_internal_mknod(dvp, vpp, cnp, vap); 1486 } 1487 1488 /* 1489 struct vop_open_args { 1490 struct vnode *a_vp; 1491 int a_mode; 1492 struct ucred *a_cred; 1493 struct thread *a_td; 1494 int a_fdidx; / struct file *a_fp; 1495 }; 1496 */ 1497 static int 1498 fuse_vnop_open(struct vop_open_args *ap) 1499 { 1500 struct vnode *vp = ap->a_vp; 1501 int a_mode = ap->a_mode; 1502 struct thread *td = ap->a_td; 1503 struct ucred *cred = ap->a_cred; 1504 pid_t pid = td->td_proc->p_pid; 1505 struct fuse_vnode_data *fvdat; 1506 1507 if (fuse_isdeadfs(vp)) 1508 return ENXIO; 1509 if (vp->v_type == VCHR || vp->v_type == VBLK || vp->v_type == VFIFO) 1510 return (EOPNOTSUPP); 1511 if ((a_mode & (FREAD | FWRITE | FEXEC)) == 0) 1512 return EINVAL; 1513 1514 fvdat = VTOFUD(vp); 1515 1516 if (fuse_filehandle_validrw(vp, a_mode, cred, pid)) { 1517 fuse_vnode_open(vp, 0, td); 1518 return 0; 1519 } 1520 1521 return fuse_filehandle_open(vp, a_mode, NULL, td, cred); 1522 } 1523 1524 static int 1525 fuse_vnop_pathconf(struct vop_pathconf_args *ap) 1526 { 1527 struct vnode *vp = ap->a_vp; 1528 struct mount *mp; 1529 1530 switch (ap->a_name) { 1531 case _PC_FILESIZEBITS: 1532 *ap->a_retval = 64; 1533 return (0); 1534 case _PC_NAME_MAX: 1535 *ap->a_retval = NAME_MAX; 1536 return (0); 1537 case _PC_LINK_MAX: 1538 *ap->a_retval = MIN(LONG_MAX, FUSE_LINK_MAX); 1539 return (0); 1540 case _PC_SYMLINK_MAX: 1541 *ap->a_retval = MAXPATHLEN; 1542 return (0); 1543 case _PC_NO_TRUNC: 1544 *ap->a_retval = 1; 1545 return (0); 1546 case _PC_MIN_HOLE_SIZE: 1547 /* 1548 * The FUSE protocol provides no mechanism for a server to 1549 * report _PC_MIN_HOLE_SIZE. It's a protocol bug. Instead, 1550 * return EINVAL if the server does not support FUSE_LSEEK, or 1551 * 1 if it does. 1552 */ 1553 mp = vnode_mount(vp); 1554 if (!fsess_is_impl(mp, FUSE_LSEEK) && 1555 !fsess_not_impl(mp, FUSE_LSEEK)) { 1556 off_t offset = 0; 1557 1558 /* Issue a FUSE_LSEEK to find out if it's implemented */ 1559 fuse_vnop_do_lseek(vp, curthread, curthread->td_ucred, 1560 curthread->td_proc->p_pid, &offset, SEEK_DATA); 1561 } 1562 1563 if (fsess_is_impl(mp, FUSE_LSEEK)) { 1564 *ap->a_retval = 1; 1565 return (0); 1566 } else { 1567 /* 1568 * Probably FUSE_LSEEK is not implemented. It might 1569 * be, if the FUSE_LSEEK above returned an error like 1570 * EACCES, but in that case we can't tell, so it's 1571 * safest to report EINVAL anyway. 1572 */ 1573 return (EINVAL); 1574 } 1575 default: 1576 return (vop_stdpathconf(ap)); 1577 } 1578 } 1579 1580 /* 1581 struct vnop_read_args { 1582 struct vnode *a_vp; 1583 struct uio *a_uio; 1584 int a_ioflag; 1585 struct ucred *a_cred; 1586 }; 1587 */ 1588 static int 1589 fuse_vnop_read(struct vop_read_args *ap) 1590 { 1591 struct vnode *vp = ap->a_vp; 1592 struct uio *uio = ap->a_uio; 1593 int ioflag = ap->a_ioflag; 1594 struct ucred *cred = ap->a_cred; 1595 pid_t pid = curthread->td_proc->p_pid; 1596 1597 if (fuse_isdeadfs(vp)) { 1598 return ENXIO; 1599 } 1600 1601 if (VTOFUD(vp)->flag & FN_DIRECTIO) { 1602 ioflag |= IO_DIRECT; 1603 } 1604 1605 return fuse_io_dispatch(vp, uio, ioflag, cred, pid); 1606 } 1607 1608 /* 1609 struct vnop_readdir_args { 1610 struct vnode *a_vp; 1611 struct uio *a_uio; 1612 struct ucred *a_cred; 1613 int *a_eofflag; 1614 int *a_ncookies; 1615 u_long **a_cookies; 1616 }; 1617 */ 1618 static int 1619 fuse_vnop_readdir(struct vop_readdir_args *ap) 1620 { 1621 struct vnode *vp = ap->a_vp; 1622 struct uio *uio = ap->a_uio; 1623 struct ucred *cred = ap->a_cred; 1624 struct fuse_filehandle *fufh = NULL; 1625 struct fuse_iov cookediov; 1626 int err = 0; 1627 u_long *cookies; 1628 off_t startoff; 1629 ssize_t tresid; 1630 int ncookies; 1631 bool closefufh = false; 1632 pid_t pid = curthread->td_proc->p_pid; 1633 1634 if (ap->a_eofflag) 1635 *ap->a_eofflag = 0; 1636 if (fuse_isdeadfs(vp)) { 1637 return ENXIO; 1638 } 1639 if ( /* XXXIP ((uio_iovcnt(uio) > 1)) || */ 1640 (uio_resid(uio) < sizeof(struct dirent))) { 1641 return EINVAL; 1642 } 1643 1644 tresid = uio->uio_resid; 1645 startoff = uio->uio_offset; 1646 err = fuse_filehandle_get_dir(vp, &fufh, cred, pid); 1647 if (err == EBADF && vnode_mount(vp)->mnt_flag & MNT_EXPORTED) { 1648 /* 1649 * nfsd will do VOP_READDIR without first doing VOP_OPEN. We 1650 * must implicitly open the directory here 1651 */ 1652 err = fuse_filehandle_open(vp, FREAD, &fufh, curthread, cred); 1653 if (err == 0) { 1654 /* 1655 * When a directory is opened, it must be read from 1656 * the beginning. Hopefully, the "startoff" still 1657 * exists as an offset cookie for the directory. 1658 * If not, it will read the entire directory without 1659 * returning any entries and just return eof. 1660 */ 1661 uio->uio_offset = 0; 1662 } 1663 closefufh = true; 1664 } 1665 if (err) 1666 return (err); 1667 if (ap->a_ncookies != NULL) { 1668 ncookies = uio->uio_resid / 1669 (offsetof(struct dirent, d_name) + 4) + 1; 1670 cookies = malloc(ncookies * sizeof(*cookies), M_TEMP, M_WAITOK); 1671 *ap->a_ncookies = ncookies; 1672 *ap->a_cookies = cookies; 1673 } else { 1674 ncookies = 0; 1675 cookies = NULL; 1676 } 1677 #define DIRCOOKEDSIZE FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + MAXNAMLEN + 1) 1678 fiov_init(&cookediov, DIRCOOKEDSIZE); 1679 1680 err = fuse_internal_readdir(vp, uio, startoff, fufh, &cookediov, 1681 &ncookies, cookies); 1682 1683 fiov_teardown(&cookediov); 1684 if (closefufh) 1685 fuse_filehandle_close(vp, fufh, curthread, cred); 1686 1687 if (ap->a_ncookies != NULL) { 1688 if (err == 0) { 1689 *ap->a_ncookies -= ncookies; 1690 } else { 1691 free(*ap->a_cookies, M_TEMP); 1692 *ap->a_ncookies = 0; 1693 *ap->a_cookies = NULL; 1694 } 1695 } 1696 if (err == 0 && tresid == uio->uio_resid) 1697 *ap->a_eofflag = 1; 1698 1699 return err; 1700 } 1701 1702 /* 1703 struct vnop_readlink_args { 1704 struct vnode *a_vp; 1705 struct uio *a_uio; 1706 struct ucred *a_cred; 1707 }; 1708 */ 1709 static int 1710 fuse_vnop_readlink(struct vop_readlink_args *ap) 1711 { 1712 struct vnode *vp = ap->a_vp; 1713 struct uio *uio = ap->a_uio; 1714 struct ucred *cred = ap->a_cred; 1715 1716 struct fuse_dispatcher fdi; 1717 int err; 1718 1719 if (fuse_isdeadfs(vp)) { 1720 return ENXIO; 1721 } 1722 if (!vnode_islnk(vp)) { 1723 return EINVAL; 1724 } 1725 fdisp_init(&fdi, 0); 1726 err = fdisp_simple_putget_vp(&fdi, FUSE_READLINK, vp, curthread, cred); 1727 if (err) { 1728 goto out; 1729 } 1730 if (((char *)fdi.answ)[0] == '/' && 1731 fuse_get_mpdata(vnode_mount(vp))->dataflags & FSESS_PUSH_SYMLINKS_IN) { 1732 char *mpth = vnode_mount(vp)->mnt_stat.f_mntonname; 1733 1734 err = uiomove(mpth, strlen(mpth), uio); 1735 } 1736 if (!err) { 1737 err = uiomove(fdi.answ, fdi.iosize, uio); 1738 } 1739 out: 1740 fdisp_destroy(&fdi); 1741 return err; 1742 } 1743 1744 /* 1745 struct vnop_reclaim_args { 1746 struct vnode *a_vp; 1747 }; 1748 */ 1749 static int 1750 fuse_vnop_reclaim(struct vop_reclaim_args *ap) 1751 { 1752 struct vnode *vp = ap->a_vp; 1753 struct thread *td = curthread; 1754 struct fuse_vnode_data *fvdat = VTOFUD(vp); 1755 struct fuse_filehandle *fufh, *fufh_tmp; 1756 1757 if (!fvdat) { 1758 panic("FUSE: no vnode data during recycling"); 1759 } 1760 LIST_FOREACH_SAFE(fufh, &fvdat->handles, next, fufh_tmp) { 1761 printf("FUSE: vnode being reclaimed with open fufh " 1762 "(type=%#x)", fufh->fufh_type); 1763 fuse_filehandle_close(vp, fufh, td, NULL); 1764 } 1765 1766 if (!fuse_isdeadfs(vp) && fvdat->nlookup > 0) { 1767 fuse_internal_forget_send(vnode_mount(vp), td, NULL, VTOI(vp), 1768 fvdat->nlookup); 1769 } 1770 cache_purge(vp); 1771 vfs_hash_remove(vp); 1772 fuse_vnode_destroy(vp); 1773 1774 return 0; 1775 } 1776 1777 /* 1778 struct vnop_remove_args { 1779 struct vnode *a_dvp; 1780 struct vnode *a_vp; 1781 struct componentname *a_cnp; 1782 }; 1783 */ 1784 static int 1785 fuse_vnop_remove(struct vop_remove_args *ap) 1786 { 1787 struct vnode *dvp = ap->a_dvp; 1788 struct vnode *vp = ap->a_vp; 1789 struct componentname *cnp = ap->a_cnp; 1790 1791 int err; 1792 1793 if (fuse_isdeadfs(vp)) { 1794 return ENXIO; 1795 } 1796 if (vnode_isdir(vp)) { 1797 return EPERM; 1798 } 1799 1800 err = fuse_internal_remove(dvp, vp, cnp, FUSE_UNLINK); 1801 1802 return err; 1803 } 1804 1805 /* 1806 struct vnop_rename_args { 1807 struct vnode *a_fdvp; 1808 struct vnode *a_fvp; 1809 struct componentname *a_fcnp; 1810 struct vnode *a_tdvp; 1811 struct vnode *a_tvp; 1812 struct componentname *a_tcnp; 1813 }; 1814 */ 1815 static int 1816 fuse_vnop_rename(struct vop_rename_args *ap) 1817 { 1818 struct vnode *fdvp = ap->a_fdvp; 1819 struct vnode *fvp = ap->a_fvp; 1820 struct componentname *fcnp = ap->a_fcnp; 1821 struct vnode *tdvp = ap->a_tdvp; 1822 struct vnode *tvp = ap->a_tvp; 1823 struct componentname *tcnp = ap->a_tcnp; 1824 struct fuse_data *data; 1825 bool newparent = fdvp != tdvp; 1826 bool isdir = fvp->v_type == VDIR; 1827 int err = 0; 1828 1829 if (fuse_isdeadfs(fdvp)) { 1830 return ENXIO; 1831 } 1832 if (fvp->v_mount != tdvp->v_mount || 1833 (tvp && fvp->v_mount != tvp->v_mount)) { 1834 SDT_PROBE2(fusefs, , vnops, trace, 1, "cross-device rename"); 1835 err = EXDEV; 1836 goto out; 1837 } 1838 cache_purge(fvp); 1839 1840 /* 1841 * FUSE library is expected to check if target directory is not 1842 * under the source directory in the file system tree. 1843 * Linux performs this check at VFS level. 1844 */ 1845 /* 1846 * If source is a directory, and it will get a new parent, user must 1847 * have write permission to it, so ".." can be modified. 1848 */ 1849 data = fuse_get_mpdata(vnode_mount(tdvp)); 1850 if (data->dataflags & FSESS_DEFAULT_PERMISSIONS && isdir && newparent) { 1851 err = fuse_internal_access(fvp, VWRITE, 1852 curthread, tcnp->cn_cred); 1853 if (err) 1854 goto out; 1855 } 1856 sx_xlock(&data->rename_lock); 1857 err = fuse_internal_rename(fdvp, fcnp, tdvp, tcnp); 1858 if (err == 0) { 1859 if (tdvp != fdvp) 1860 fuse_vnode_setparent(fvp, tdvp); 1861 if (tvp != NULL) 1862 fuse_vnode_setparent(tvp, NULL); 1863 } 1864 sx_unlock(&data->rename_lock); 1865 1866 if (tvp != NULL && tvp != fvp) { 1867 cache_purge(tvp); 1868 } 1869 if (vnode_isdir(fvp)) { 1870 if ((tvp != NULL) && vnode_isdir(tvp)) { 1871 cache_purge(tdvp); 1872 } 1873 cache_purge(fdvp); 1874 } 1875 out: 1876 if (tdvp == tvp) { 1877 vrele(tdvp); 1878 } else { 1879 vput(tdvp); 1880 } 1881 if (tvp != NULL) { 1882 vput(tvp); 1883 } 1884 vrele(fdvp); 1885 vrele(fvp); 1886 1887 return err; 1888 } 1889 1890 /* 1891 struct vnop_rmdir_args { 1892 struct vnode *a_dvp; 1893 struct vnode *a_vp; 1894 struct componentname *a_cnp; 1895 } *ap; 1896 */ 1897 static int 1898 fuse_vnop_rmdir(struct vop_rmdir_args *ap) 1899 { 1900 struct vnode *dvp = ap->a_dvp; 1901 struct vnode *vp = ap->a_vp; 1902 1903 int err; 1904 1905 if (fuse_isdeadfs(vp)) { 1906 return ENXIO; 1907 } 1908 if (VTOFUD(vp) == VTOFUD(dvp)) { 1909 return EINVAL; 1910 } 1911 err = fuse_internal_remove(dvp, vp, ap->a_cnp, FUSE_RMDIR); 1912 1913 return err; 1914 } 1915 1916 /* 1917 struct vnop_setattr_args { 1918 struct vnode *a_vp; 1919 struct vattr *a_vap; 1920 struct ucred *a_cred; 1921 struct thread *a_td; 1922 }; 1923 */ 1924 static int 1925 fuse_vnop_setattr(struct vop_setattr_args *ap) 1926 { 1927 struct vnode *vp = ap->a_vp; 1928 struct vattr *vap = ap->a_vap; 1929 struct ucred *cred = ap->a_cred; 1930 struct thread *td = curthread; 1931 struct mount *mp; 1932 struct fuse_data *data; 1933 struct vattr old_va; 1934 int dataflags; 1935 int err = 0, err2; 1936 accmode_t accmode = 0; 1937 bool checkperm; 1938 bool drop_suid = false; 1939 gid_t cr_gid; 1940 1941 mp = vnode_mount(vp); 1942 data = fuse_get_mpdata(mp); 1943 dataflags = data->dataflags; 1944 checkperm = dataflags & FSESS_DEFAULT_PERMISSIONS; 1945 if (cred->cr_ngroups > 0) 1946 cr_gid = cred->cr_groups[0]; 1947 else 1948 cr_gid = 0; 1949 1950 if (fuse_isdeadfs(vp)) { 1951 return ENXIO; 1952 } 1953 1954 if (vap->va_uid != (uid_t)VNOVAL) { 1955 if (checkperm) { 1956 /* Only root may change a file's owner */ 1957 err = priv_check_cred(cred, PRIV_VFS_CHOWN); 1958 if (err) { 1959 /* As a special case, allow the null chown */ 1960 err2 = fuse_internal_getattr(vp, &old_va, cred, 1961 td); 1962 if (err2) 1963 return (err2); 1964 if (vap->va_uid != old_va.va_uid) 1965 return err; 1966 else 1967 accmode |= VADMIN; 1968 drop_suid = true; 1969 } else 1970 accmode |= VADMIN; 1971 } else 1972 accmode |= VADMIN; 1973 } 1974 if (vap->va_gid != (gid_t)VNOVAL) { 1975 if (checkperm && priv_check_cred(cred, PRIV_VFS_CHOWN)) 1976 drop_suid = true; 1977 if (checkperm && !groupmember(vap->va_gid, cred)) 1978 { 1979 /* 1980 * Non-root users may only chgrp to one of their own 1981 * groups 1982 */ 1983 err = priv_check_cred(cred, PRIV_VFS_CHOWN); 1984 if (err) { 1985 /* As a special case, allow the null chgrp */ 1986 err2 = fuse_internal_getattr(vp, &old_va, cred, 1987 td); 1988 if (err2) 1989 return (err2); 1990 if (vap->va_gid != old_va.va_gid) 1991 return err; 1992 accmode |= VADMIN; 1993 } else 1994 accmode |= VADMIN; 1995 } else 1996 accmode |= VADMIN; 1997 } 1998 if (vap->va_size != VNOVAL) { 1999 switch (vp->v_type) { 2000 case VDIR: 2001 return (EISDIR); 2002 case VLNK: 2003 case VREG: 2004 if (vfs_isrdonly(mp)) 2005 return (EROFS); 2006 break; 2007 default: 2008 /* 2009 * According to POSIX, the result is unspecified 2010 * for file types other than regular files, 2011 * directories and shared memory objects. We 2012 * don't support shared memory objects in the file 2013 * system, and have dubious support for truncating 2014 * symlinks. Just ignore the request in other cases. 2015 */ 2016 return (0); 2017 } 2018 /* Don't set accmode. Permission to trunc is checked upstack */ 2019 } 2020 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 2021 if (vap->va_vaflags & VA_UTIMES_NULL) 2022 accmode |= VWRITE; 2023 else 2024 accmode |= VADMIN; 2025 } 2026 if (drop_suid) { 2027 if (vap->va_mode != (mode_t)VNOVAL) 2028 vap->va_mode &= ~(S_ISUID | S_ISGID); 2029 else { 2030 err = fuse_internal_getattr(vp, &old_va, cred, td); 2031 if (err) 2032 return (err); 2033 vap->va_mode = old_va.va_mode & ~(S_ISUID | S_ISGID); 2034 } 2035 } 2036 if (vap->va_mode != (mode_t)VNOVAL) { 2037 /* Only root may set the sticky bit on non-directories */ 2038 if (checkperm && vp->v_type != VDIR && (vap->va_mode & S_ISTXT) 2039 && priv_check_cred(cred, PRIV_VFS_STICKYFILE)) 2040 return EFTYPE; 2041 if (checkperm && (vap->va_mode & S_ISGID)) { 2042 err = fuse_internal_getattr(vp, &old_va, cred, td); 2043 if (err) 2044 return (err); 2045 if (!groupmember(old_va.va_gid, cred)) { 2046 err = priv_check_cred(cred, PRIV_VFS_SETGID); 2047 if (err) 2048 return (err); 2049 } 2050 } 2051 accmode |= VADMIN; 2052 } 2053 2054 if (vfs_isrdonly(mp)) 2055 return EROFS; 2056 2057 if (checkperm) { 2058 err = fuse_internal_access(vp, accmode, td, cred); 2059 } else { 2060 err = 0; 2061 } 2062 if (err) 2063 return err; 2064 else 2065 return fuse_internal_setattr(vp, vap, td, cred); 2066 } 2067 2068 /* 2069 struct vnop_strategy_args { 2070 struct vnode *a_vp; 2071 struct buf *a_bp; 2072 }; 2073 */ 2074 static int 2075 fuse_vnop_strategy(struct vop_strategy_args *ap) 2076 { 2077 struct vnode *vp = ap->a_vp; 2078 struct buf *bp = ap->a_bp; 2079 2080 if (!vp || fuse_isdeadfs(vp)) { 2081 bp->b_ioflags |= BIO_ERROR; 2082 bp->b_error = ENXIO; 2083 bufdone(bp); 2084 return 0; 2085 } 2086 2087 /* 2088 * VOP_STRATEGY always returns zero and signals error via bp->b_ioflags. 2089 * fuse_io_strategy sets bp's error fields 2090 */ 2091 (void)fuse_io_strategy(vp, bp); 2092 2093 return 0; 2094 } 2095 2096 /* 2097 struct vnop_symlink_args { 2098 struct vnode *a_dvp; 2099 struct vnode **a_vpp; 2100 struct componentname *a_cnp; 2101 struct vattr *a_vap; 2102 char *a_target; 2103 }; 2104 */ 2105 static int 2106 fuse_vnop_symlink(struct vop_symlink_args *ap) 2107 { 2108 struct vnode *dvp = ap->a_dvp; 2109 struct vnode **vpp = ap->a_vpp; 2110 struct componentname *cnp = ap->a_cnp; 2111 const char *target = ap->a_target; 2112 2113 struct fuse_dispatcher fdi; 2114 2115 int err; 2116 size_t len; 2117 2118 if (fuse_isdeadfs(dvp)) { 2119 return ENXIO; 2120 } 2121 /* 2122 * Unlike the other creator type calls, here we have to create a message 2123 * where the name of the new entry comes first, and the data describing 2124 * the entry comes second. 2125 * Hence we can't rely on our handy fuse_internal_newentry() routine, 2126 * but put together the message manually and just call the core part. 2127 */ 2128 2129 len = strlen(target) + 1; 2130 fdisp_init(&fdi, len + cnp->cn_namelen + 1); 2131 fdisp_make_vp(&fdi, FUSE_SYMLINK, dvp, curthread, NULL); 2132 2133 memcpy(fdi.indata, cnp->cn_nameptr, cnp->cn_namelen); 2134 ((char *)fdi.indata)[cnp->cn_namelen] = '\0'; 2135 memcpy((char *)fdi.indata + cnp->cn_namelen + 1, target, len); 2136 2137 err = fuse_internal_newentry_core(dvp, vpp, cnp, VLNK, &fdi); 2138 fdisp_destroy(&fdi); 2139 return err; 2140 } 2141 2142 /* 2143 struct vnop_write_args { 2144 struct vnode *a_vp; 2145 struct uio *a_uio; 2146 int a_ioflag; 2147 struct ucred *a_cred; 2148 }; 2149 */ 2150 static int 2151 fuse_vnop_write(struct vop_write_args *ap) 2152 { 2153 struct vnode *vp = ap->a_vp; 2154 struct uio *uio = ap->a_uio; 2155 int ioflag = ap->a_ioflag; 2156 struct ucred *cred = ap->a_cred; 2157 pid_t pid = curthread->td_proc->p_pid; 2158 2159 if (fuse_isdeadfs(vp)) { 2160 return ENXIO; 2161 } 2162 2163 if (VTOFUD(vp)->flag & FN_DIRECTIO) { 2164 ioflag |= IO_DIRECT; 2165 } 2166 2167 return fuse_io_dispatch(vp, uio, ioflag, cred, pid); 2168 } 2169 2170 static daddr_t 2171 fuse_gbp_getblkno(struct vnode *vp, vm_ooffset_t off) 2172 { 2173 const int biosize = fuse_iosize(vp); 2174 2175 return (off / biosize); 2176 } 2177 2178 static int 2179 fuse_gbp_getblksz(struct vnode *vp, daddr_t lbn, long *blksz) 2180 { 2181 off_t filesize; 2182 int err; 2183 const int biosize = fuse_iosize(vp); 2184 2185 err = fuse_vnode_size(vp, &filesize, NULL, NULL); 2186 if (err) { 2187 /* This will turn into a SIGBUS */ 2188 return (EIO); 2189 } else if ((off_t)lbn * biosize >= filesize) { 2190 *blksz = 0; 2191 } else if ((off_t)(lbn + 1) * biosize > filesize) { 2192 *blksz = filesize - (off_t)lbn *biosize; 2193 } else { 2194 *blksz = biosize; 2195 } 2196 return (0); 2197 } 2198 2199 /* 2200 struct vnop_getpages_args { 2201 struct vnode *a_vp; 2202 vm_page_t *a_m; 2203 int a_count; 2204 int a_reqpage; 2205 }; 2206 */ 2207 static int 2208 fuse_vnop_getpages(struct vop_getpages_args *ap) 2209 { 2210 struct vnode *vp = ap->a_vp; 2211 2212 if (!fsess_opt_mmap(vnode_mount(vp))) { 2213 SDT_PROBE2(fusefs, , vnops, trace, 1, 2214 "called on non-cacheable vnode??\n"); 2215 return (VM_PAGER_ERROR); 2216 } 2217 2218 return (vfs_bio_getpages(vp, ap->a_m, ap->a_count, ap->a_rbehind, 2219 ap->a_rahead, fuse_gbp_getblkno, fuse_gbp_getblksz)); 2220 } 2221 2222 static const char extattr_namespace_separator = '.'; 2223 2224 /* 2225 struct vop_getextattr_args { 2226 struct vop_generic_args a_gen; 2227 struct vnode *a_vp; 2228 int a_attrnamespace; 2229 const char *a_name; 2230 struct uio *a_uio; 2231 size_t *a_size; 2232 struct ucred *a_cred; 2233 struct thread *a_td; 2234 }; 2235 */ 2236 static int 2237 fuse_vnop_getextattr(struct vop_getextattr_args *ap) 2238 { 2239 struct vnode *vp = ap->a_vp; 2240 struct uio *uio = ap->a_uio; 2241 struct fuse_dispatcher fdi; 2242 struct fuse_getxattr_in *get_xattr_in; 2243 struct fuse_getxattr_out *get_xattr_out; 2244 struct mount *mp = vnode_mount(vp); 2245 struct thread *td = ap->a_td; 2246 struct ucred *cred = ap->a_cred; 2247 char *prefix; 2248 char *attr_str; 2249 size_t len; 2250 int err; 2251 2252 if (fuse_isdeadfs(vp)) 2253 return (ENXIO); 2254 2255 if (fsess_not_impl(mp, FUSE_GETXATTR)) 2256 return EOPNOTSUPP; 2257 2258 err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td, VREAD); 2259 if (err) 2260 return err; 2261 2262 /* Default to looking for user attributes. */ 2263 if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM) 2264 prefix = EXTATTR_NAMESPACE_SYSTEM_STRING; 2265 else 2266 prefix = EXTATTR_NAMESPACE_USER_STRING; 2267 2268 len = strlen(prefix) + sizeof(extattr_namespace_separator) + 2269 strlen(ap->a_name) + 1; 2270 2271 fdisp_init(&fdi, len + sizeof(*get_xattr_in)); 2272 fdisp_make_vp(&fdi, FUSE_GETXATTR, vp, td, cred); 2273 2274 get_xattr_in = fdi.indata; 2275 /* 2276 * Check to see whether we're querying the available size or 2277 * issuing the actual request. If we pass in 0, we get back struct 2278 * fuse_getxattr_out. If we pass in a non-zero size, we get back 2279 * that much data, without the struct fuse_getxattr_out header. 2280 */ 2281 if (uio == NULL) 2282 get_xattr_in->size = 0; 2283 else 2284 get_xattr_in->size = uio->uio_resid; 2285 2286 attr_str = (char *)fdi.indata + sizeof(*get_xattr_in); 2287 snprintf(attr_str, len, "%s%c%s", prefix, extattr_namespace_separator, 2288 ap->a_name); 2289 2290 err = fdisp_wait_answ(&fdi); 2291 if (err != 0) { 2292 if (err == ENOSYS) { 2293 fsess_set_notimpl(mp, FUSE_GETXATTR); 2294 err = EOPNOTSUPP; 2295 } 2296 goto out; 2297 } 2298 2299 get_xattr_out = fdi.answ; 2300 2301 if (ap->a_size != NULL) 2302 *ap->a_size = get_xattr_out->size; 2303 2304 if (uio != NULL) 2305 err = uiomove(fdi.answ, fdi.iosize, uio); 2306 2307 out: 2308 fdisp_destroy(&fdi); 2309 return (err); 2310 } 2311 2312 /* 2313 struct vop_setextattr_args { 2314 struct vop_generic_args a_gen; 2315 struct vnode *a_vp; 2316 int a_attrnamespace; 2317 const char *a_name; 2318 struct uio *a_uio; 2319 struct ucred *a_cred; 2320 struct thread *a_td; 2321 }; 2322 */ 2323 static int 2324 fuse_vnop_setextattr(struct vop_setextattr_args *ap) 2325 { 2326 struct vnode *vp = ap->a_vp; 2327 struct uio *uio = ap->a_uio; 2328 struct fuse_dispatcher fdi; 2329 struct fuse_setxattr_in *set_xattr_in; 2330 struct mount *mp = vnode_mount(vp); 2331 struct thread *td = ap->a_td; 2332 struct ucred *cred = ap->a_cred; 2333 char *prefix; 2334 size_t len; 2335 char *attr_str; 2336 int err; 2337 2338 if (fuse_isdeadfs(vp)) 2339 return (ENXIO); 2340 2341 if (fsess_not_impl(mp, FUSE_SETXATTR)) 2342 return EOPNOTSUPP; 2343 2344 if (vfs_isrdonly(mp)) 2345 return EROFS; 2346 2347 /* Deleting xattrs must use VOP_DELETEEXTATTR instead */ 2348 if (ap->a_uio == NULL) { 2349 /* 2350 * If we got here as fallback from VOP_DELETEEXTATTR, then 2351 * return EOPNOTSUPP. 2352 */ 2353 if (fsess_not_impl(mp, FUSE_REMOVEXATTR)) 2354 return (EOPNOTSUPP); 2355 else 2356 return (EINVAL); 2357 } 2358 2359 err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td, 2360 VWRITE); 2361 if (err) 2362 return err; 2363 2364 /* Default to looking for user attributes. */ 2365 if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM) 2366 prefix = EXTATTR_NAMESPACE_SYSTEM_STRING; 2367 else 2368 prefix = EXTATTR_NAMESPACE_USER_STRING; 2369 2370 len = strlen(prefix) + sizeof(extattr_namespace_separator) + 2371 strlen(ap->a_name) + 1; 2372 2373 fdisp_init(&fdi, len + sizeof(*set_xattr_in) + uio->uio_resid); 2374 fdisp_make_vp(&fdi, FUSE_SETXATTR, vp, td, cred); 2375 2376 set_xattr_in = fdi.indata; 2377 set_xattr_in->size = uio->uio_resid; 2378 2379 attr_str = (char *)fdi.indata + sizeof(*set_xattr_in); 2380 snprintf(attr_str, len, "%s%c%s", prefix, extattr_namespace_separator, 2381 ap->a_name); 2382 2383 err = uiomove((char *)fdi.indata + sizeof(*set_xattr_in) + len, 2384 uio->uio_resid, uio); 2385 if (err != 0) { 2386 goto out; 2387 } 2388 2389 err = fdisp_wait_answ(&fdi); 2390 2391 if (err == ENOSYS) { 2392 fsess_set_notimpl(mp, FUSE_SETXATTR); 2393 err = EOPNOTSUPP; 2394 } 2395 if (err == ERESTART) { 2396 /* Can't restart after calling uiomove */ 2397 err = EINTR; 2398 } 2399 2400 out: 2401 fdisp_destroy(&fdi); 2402 return (err); 2403 } 2404 2405 /* 2406 * The Linux / FUSE extended attribute list is simply a collection of 2407 * NUL-terminated strings. The FreeBSD extended attribute list is a single 2408 * byte length followed by a non-NUL terminated string. So, this allows 2409 * conversion of the Linux / FUSE format to the FreeBSD format in place. 2410 * Linux attribute names are reported with the namespace as a prefix (e.g. 2411 * "user.attribute_name"), but in FreeBSD they are reported without the 2412 * namespace prefix (e.g. "attribute_name"). So, we're going from: 2413 * 2414 * user.attr_name1\0user.attr_name2\0 2415 * 2416 * to: 2417 * 2418 * <num>attr_name1<num>attr_name2 2419 * 2420 * Where "<num>" is a single byte number of characters in the attribute name. 2421 * 2422 * Args: 2423 * prefix - exattr namespace prefix string 2424 * list, list_len - input list with namespace prefixes 2425 * bsd_list, bsd_list_len - output list compatible with bsd vfs 2426 */ 2427 static int 2428 fuse_xattrlist_convert(char *prefix, const char *list, int list_len, 2429 char *bsd_list, int *bsd_list_len) 2430 { 2431 int len, pos, dist_to_next, prefix_len; 2432 2433 pos = 0; 2434 *bsd_list_len = 0; 2435 prefix_len = strlen(prefix); 2436 2437 while (pos < list_len && list[pos] != '\0') { 2438 dist_to_next = strlen(&list[pos]) + 1; 2439 if (bcmp(&list[pos], prefix, prefix_len) == 0 && 2440 list[pos + prefix_len] == extattr_namespace_separator) { 2441 len = dist_to_next - 2442 (prefix_len + sizeof(extattr_namespace_separator)) - 1; 2443 if (len >= EXTATTR_MAXNAMELEN) 2444 return (ENAMETOOLONG); 2445 2446 bsd_list[*bsd_list_len] = len; 2447 memcpy(&bsd_list[*bsd_list_len + 1], 2448 &list[pos + prefix_len + 2449 sizeof(extattr_namespace_separator)], len); 2450 2451 *bsd_list_len += len + 1; 2452 } 2453 2454 pos += dist_to_next; 2455 } 2456 2457 return (0); 2458 } 2459 2460 /* 2461 * List extended attributes 2462 * 2463 * The FUSE_LISTXATTR operation is based on Linux's listxattr(2) syscall, which 2464 * has a number of differences compared to its FreeBSD equivalent, 2465 * extattr_list_file: 2466 * 2467 * - FUSE_LISTXATTR returns all extended attributes across all namespaces, 2468 * whereas listxattr(2) only returns attributes for a single namespace 2469 * - FUSE_LISTXATTR prepends each attribute name with "namespace." 2470 * - If the provided buffer is not large enough to hold the result, 2471 * FUSE_LISTXATTR should return ERANGE, whereas listxattr is expected to 2472 * return as many results as will fit. 2473 */ 2474 /* 2475 struct vop_listextattr_args { 2476 struct vop_generic_args a_gen; 2477 struct vnode *a_vp; 2478 int a_attrnamespace; 2479 struct uio *a_uio; 2480 size_t *a_size; 2481 struct ucred *a_cred; 2482 struct thread *a_td; 2483 }; 2484 */ 2485 static int 2486 fuse_vnop_listextattr(struct vop_listextattr_args *ap) 2487 { 2488 struct vnode *vp = ap->a_vp; 2489 struct uio *uio = ap->a_uio; 2490 struct fuse_dispatcher fdi; 2491 struct fuse_listxattr_in *list_xattr_in; 2492 struct fuse_listxattr_out *list_xattr_out; 2493 struct mount *mp = vnode_mount(vp); 2494 struct thread *td = ap->a_td; 2495 struct ucred *cred = ap->a_cred; 2496 char *prefix; 2497 char *bsd_list = NULL; 2498 char *linux_list; 2499 int bsd_list_len; 2500 int linux_list_len; 2501 int err; 2502 2503 if (fuse_isdeadfs(vp)) 2504 return (ENXIO); 2505 2506 if (fsess_not_impl(mp, FUSE_LISTXATTR)) 2507 return EOPNOTSUPP; 2508 2509 err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td, VREAD); 2510 if (err) 2511 return err; 2512 2513 /* 2514 * Add space for a NUL and the period separator if enabled. 2515 * Default to looking for user attributes. 2516 */ 2517 if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM) 2518 prefix = EXTATTR_NAMESPACE_SYSTEM_STRING; 2519 else 2520 prefix = EXTATTR_NAMESPACE_USER_STRING; 2521 2522 fdisp_init(&fdi, sizeof(*list_xattr_in)); 2523 fdisp_make_vp(&fdi, FUSE_LISTXATTR, vp, td, cred); 2524 2525 /* 2526 * Retrieve Linux / FUSE compatible list size. 2527 */ 2528 list_xattr_in = fdi.indata; 2529 list_xattr_in->size = 0; 2530 2531 err = fdisp_wait_answ(&fdi); 2532 if (err != 0) { 2533 if (err == ENOSYS) { 2534 fsess_set_notimpl(mp, FUSE_LISTXATTR); 2535 err = EOPNOTSUPP; 2536 } 2537 goto out; 2538 } 2539 2540 list_xattr_out = fdi.answ; 2541 linux_list_len = list_xattr_out->size; 2542 if (linux_list_len == 0) { 2543 if (ap->a_size != NULL) 2544 *ap->a_size = linux_list_len; 2545 goto out; 2546 } 2547 2548 /* 2549 * Retrieve Linux / FUSE compatible list values. 2550 */ 2551 fdisp_refresh_vp(&fdi, FUSE_LISTXATTR, vp, td, cred); 2552 list_xattr_in = fdi.indata; 2553 list_xattr_in->size = linux_list_len; 2554 2555 err = fdisp_wait_answ(&fdi); 2556 if (err == ERANGE) { 2557 /* 2558 * Race detected. The attribute list must've grown since the 2559 * first FUSE_LISTXATTR call. Start over. Go all the way back 2560 * to userland so we can process signals, if necessary, before 2561 * restarting. 2562 */ 2563 err = ERESTART; 2564 goto out; 2565 } else if (err != 0) 2566 goto out; 2567 2568 linux_list = fdi.answ; 2569 /* FUSE doesn't allow the server to return more data than requested */ 2570 if (fdi.iosize > linux_list_len) { 2571 struct fuse_data *data = fuse_get_mpdata(mp); 2572 2573 fuse_warn(data, FSESS_WARN_LSEXTATTR_LONG, 2574 "server returned " 2575 "more extended attribute data than requested; " 2576 "should've returned ERANGE instead."); 2577 } else { 2578 /* But returning less data is fine */ 2579 linux_list_len = fdi.iosize; 2580 } 2581 2582 /* 2583 * Retrieve the BSD compatible list values. 2584 * The Linux / FUSE attribute list format isn't the same 2585 * as FreeBSD's format. So we need to transform it into 2586 * FreeBSD's format before giving it to the user. 2587 */ 2588 bsd_list = malloc(linux_list_len, M_TEMP, M_WAITOK); 2589 err = fuse_xattrlist_convert(prefix, linux_list, linux_list_len, 2590 bsd_list, &bsd_list_len); 2591 if (err != 0) 2592 goto out; 2593 2594 if (ap->a_size != NULL) 2595 *ap->a_size = bsd_list_len; 2596 2597 if (uio != NULL) 2598 err = uiomove(bsd_list, bsd_list_len, uio); 2599 2600 out: 2601 free(bsd_list, M_TEMP); 2602 fdisp_destroy(&fdi); 2603 return (err); 2604 } 2605 2606 /* 2607 struct vop_deleteextattr_args { 2608 struct vop_generic_args a_gen; 2609 struct vnode *a_vp; 2610 int a_attrnamespace; 2611 const char *a_name; 2612 struct ucred *a_cred; 2613 struct thread *a_td; 2614 }; 2615 */ 2616 static int 2617 fuse_vnop_deleteextattr(struct vop_deleteextattr_args *ap) 2618 { 2619 struct vnode *vp = ap->a_vp; 2620 struct fuse_dispatcher fdi; 2621 struct mount *mp = vnode_mount(vp); 2622 struct thread *td = ap->a_td; 2623 struct ucred *cred = ap->a_cred; 2624 char *prefix; 2625 size_t len; 2626 char *attr_str; 2627 int err; 2628 2629 if (fuse_isdeadfs(vp)) 2630 return (ENXIO); 2631 2632 if (fsess_not_impl(mp, FUSE_REMOVEXATTR)) 2633 return EOPNOTSUPP; 2634 2635 if (vfs_isrdonly(mp)) 2636 return EROFS; 2637 2638 err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td, 2639 VWRITE); 2640 if (err) 2641 return err; 2642 2643 /* Default to looking for user attributes. */ 2644 if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM) 2645 prefix = EXTATTR_NAMESPACE_SYSTEM_STRING; 2646 else 2647 prefix = EXTATTR_NAMESPACE_USER_STRING; 2648 2649 len = strlen(prefix) + sizeof(extattr_namespace_separator) + 2650 strlen(ap->a_name) + 1; 2651 2652 fdisp_init(&fdi, len); 2653 fdisp_make_vp(&fdi, FUSE_REMOVEXATTR, vp, td, cred); 2654 2655 attr_str = fdi.indata; 2656 snprintf(attr_str, len, "%s%c%s", prefix, extattr_namespace_separator, 2657 ap->a_name); 2658 2659 err = fdisp_wait_answ(&fdi); 2660 if (err == ENOSYS) { 2661 fsess_set_notimpl(mp, FUSE_REMOVEXATTR); 2662 err = EOPNOTSUPP; 2663 } 2664 2665 fdisp_destroy(&fdi); 2666 return (err); 2667 } 2668 2669 /* 2670 struct vnop_print_args { 2671 struct vnode *a_vp; 2672 }; 2673 */ 2674 static int 2675 fuse_vnop_print(struct vop_print_args *ap) 2676 { 2677 struct fuse_vnode_data *fvdat = VTOFUD(ap->a_vp); 2678 2679 printf("nodeid: %ju, parent nodeid: %ju, nlookup: %ju, flag: %#x\n", 2680 (uintmax_t)VTOILLU(ap->a_vp), (uintmax_t)fvdat->parent_nid, 2681 (uintmax_t)fvdat->nlookup, 2682 fvdat->flag); 2683 2684 return 0; 2685 } 2686 2687 /* 2688 * Get an NFS filehandle for a FUSE file. 2689 * 2690 * This will only work for FUSE file systems that guarantee the uniqueness of 2691 * nodeid:generation, which most don't. 2692 */ 2693 /* 2694 vop_vptofh { 2695 IN struct vnode *a_vp; 2696 IN struct fid *a_fhp; 2697 }; 2698 */ 2699 static int 2700 fuse_vnop_vptofh(struct vop_vptofh_args *ap) 2701 { 2702 struct vnode *vp = ap->a_vp; 2703 struct fuse_vnode_data *fvdat = VTOFUD(vp); 2704 struct fuse_fid *fhp = (struct fuse_fid *)(ap->a_fhp); 2705 _Static_assert(sizeof(struct fuse_fid) <= sizeof(struct fid), 2706 "FUSE fid type is too big"); 2707 struct mount *mp = vnode_mount(vp); 2708 struct fuse_data *data = fuse_get_mpdata(mp); 2709 struct vattr va; 2710 int err; 2711 2712 if (!(data->dataflags & FSESS_EXPORT_SUPPORT)) 2713 return EOPNOTSUPP; 2714 2715 err = fuse_internal_getattr(vp, &va, curthread->td_ucred, curthread); 2716 if (err) 2717 return err; 2718 2719 /*ip = VTOI(ap->a_vp);*/ 2720 /*ufhp = (struct ufid *)ap->a_fhp;*/ 2721 fhp->len = sizeof(struct fuse_fid); 2722 fhp->nid = fvdat->nid; 2723 if (fvdat->generation <= UINT32_MAX) 2724 fhp->gen = fvdat->generation; 2725 else 2726 return EOVERFLOW; 2727 return (0); 2728 } 2729