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 uint64_t biosize; 520 off_t filesize; 521 daddr_t lbn = ap->a_bn; 522 daddr_t *pbn = ap->a_bnp; 523 int *runp = ap->a_runp; 524 int *runb = ap->a_runb; 525 int error = 0; 526 int maxrun; 527 528 if (fuse_isdeadfs(vp)) { 529 return ENXIO; 530 } 531 532 mp = vnode_mount(vp); 533 data = fuse_get_mpdata(mp); 534 biosize = fuse_iosize(vp); 535 maxrun = MIN(vp->v_mount->mnt_iosize_max / biosize - 1, 536 data->max_readahead_blocks); 537 538 if (bo != NULL) 539 *bo = &vp->v_bufobj; 540 541 /* 542 * The FUSE_BMAP operation does not include the runp and runb 543 * variables, so we must guess. Report nonzero contiguous runs so 544 * cluster_read will combine adjacent reads. It's worthwhile to reduce 545 * upcalls even if we don't know the true physical layout of the file. 546 * 547 * FUSE file systems may opt out of read clustering in two ways: 548 * * mounting with -onoclusterr 549 * * Setting max_readahead <= maxbcachebuf during FUSE_INIT 550 */ 551 if (runb != NULL) 552 *runb = MIN(lbn, maxrun); 553 if (runp != NULL) { 554 error = fuse_vnode_size(vp, &filesize, td->td_ucred, td); 555 if (error == 0) 556 *runp = MIN(MAX(0, filesize / (off_t)biosize - lbn - 1), 557 maxrun); 558 else 559 *runp = 0; 560 } 561 562 if (fsess_maybe_impl(mp, FUSE_BMAP)) { 563 fdisp_init(&fdi, sizeof(*fbi)); 564 fdisp_make_vp(&fdi, FUSE_BMAP, vp, td, td->td_ucred); 565 fbi = fdi.indata; 566 fbi->block = lbn; 567 fbi->blocksize = biosize; 568 error = fdisp_wait_answ(&fdi); 569 if (error == ENOSYS) { 570 fdisp_destroy(&fdi); 571 fsess_set_notimpl(mp, FUSE_BMAP); 572 error = 0; 573 } else { 574 fbo = fdi.answ; 575 if (error == 0 && pbn != NULL) 576 *pbn = fbo->block; 577 fdisp_destroy(&fdi); 578 return error; 579 } 580 } 581 582 /* If the daemon doesn't support BMAP, make up a sensible default */ 583 if (pbn != NULL) 584 *pbn = lbn * btodb(biosize); 585 return (error); 586 } 587 588 /* 589 struct vop_close_args { 590 struct vnode *a_vp; 591 int a_fflag; 592 struct ucred *a_cred; 593 struct thread *a_td; 594 }; 595 */ 596 static int 597 fuse_vnop_close(struct vop_close_args *ap) 598 { 599 struct vnode *vp = ap->a_vp; 600 struct ucred *cred = ap->a_cred; 601 int fflag = ap->a_fflag; 602 struct thread *td = ap->a_td; 603 pid_t pid = td->td_proc->p_pid; 604 int err = 0; 605 606 if (fuse_isdeadfs(vp)) 607 return 0; 608 if (vnode_isdir(vp)) 609 return 0; 610 if (fflag & IO_NDELAY) 611 return 0; 612 613 err = fuse_flush(vp, cred, pid, fflag); 614 /* TODO: close the file handle, if we're sure it's no longer used */ 615 if ((VTOFUD(vp)->flag & FN_SIZECHANGE) != 0) { 616 fuse_vnode_savesize(vp, cred, td->td_proc->p_pid); 617 } 618 return err; 619 } 620 621 /* 622 struct vop_copy_file_range_args { 623 struct vop_generic_args a_gen; 624 struct vnode *a_invp; 625 off_t *a_inoffp; 626 struct vnode *a_outvp; 627 off_t *a_outoffp; 628 size_t *a_lenp; 629 unsigned int a_flags; 630 struct ucred *a_incred; 631 struct ucred *a_outcred; 632 struct thread *a_fsizetd; 633 } 634 */ 635 static int 636 fuse_vnop_copy_file_range(struct vop_copy_file_range_args *ap) 637 { 638 struct vnode *invp = ap->a_invp; 639 struct vnode *outvp = ap->a_outvp; 640 struct mount *mp = vnode_mount(invp); 641 struct fuse_dispatcher fdi; 642 struct fuse_filehandle *infufh, *outfufh; 643 struct fuse_copy_file_range_in *fcfri; 644 struct ucred *incred = ap->a_incred; 645 struct ucred *outcred = ap->a_outcred; 646 struct fuse_write_out *fwo; 647 struct thread *td; 648 struct uio io; 649 pid_t pid; 650 int err; 651 652 if (mp != vnode_mount(outvp)) 653 goto fallback; 654 655 if (incred->cr_uid != outcred->cr_uid) 656 goto fallback; 657 658 if (incred->cr_groups[0] != outcred->cr_groups[0]) 659 goto fallback; 660 661 if (fsess_not_impl(mp, FUSE_COPY_FILE_RANGE)) 662 goto fallback; 663 664 if (ap->a_fsizetd == NULL) 665 td = curthread; 666 else 667 td = ap->a_fsizetd; 668 pid = td->td_proc->p_pid; 669 670 /* Lock both vnodes, avoiding risk of deadlock. */ 671 do { 672 err = vn_lock(outvp, LK_EXCLUSIVE); 673 if (invp == outvp) 674 break; 675 if (err == 0) { 676 err = vn_lock(invp, LK_SHARED | LK_NOWAIT); 677 if (err == 0) 678 break; 679 VOP_UNLOCK(outvp); 680 err = vn_lock(invp, LK_SHARED); 681 if (err == 0) 682 VOP_UNLOCK(invp); 683 } 684 } while (err == 0); 685 if (err != 0) 686 return (err); 687 688 err = fuse_filehandle_getrw(invp, FREAD, &infufh, incred, pid); 689 if (err) 690 goto unlock; 691 692 err = fuse_filehandle_getrw(outvp, FWRITE, &outfufh, outcred, pid); 693 if (err) 694 goto unlock; 695 696 if (ap->a_fsizetd) { 697 io.uio_offset = *ap->a_outoffp; 698 io.uio_resid = *ap->a_lenp; 699 err = vn_rlimit_fsize(outvp, &io, ap->a_fsizetd); 700 if (err) 701 goto unlock; 702 } 703 704 fdisp_init(&fdi, sizeof(*fcfri)); 705 fdisp_make_vp(&fdi, FUSE_COPY_FILE_RANGE, invp, td, incred); 706 fcfri = fdi.indata; 707 fcfri->fh_in = infufh->fh_id; 708 fcfri->off_in = *ap->a_inoffp; 709 fcfri->nodeid_out = VTOI(outvp); 710 fcfri->fh_out = outfufh->fh_id; 711 fcfri->off_out = *ap->a_outoffp; 712 fcfri->len = *ap->a_lenp; 713 fcfri->flags = 0; 714 715 err = fdisp_wait_answ(&fdi); 716 if (err == 0) { 717 fwo = fdi.answ; 718 *ap->a_lenp = fwo->size; 719 *ap->a_inoffp += fwo->size; 720 *ap->a_outoffp += fwo->size; 721 fuse_internal_clear_suid_on_write(outvp, outcred, td); 722 } 723 fdisp_destroy(&fdi); 724 725 unlock: 726 if (invp != outvp) 727 VOP_UNLOCK(invp); 728 VOP_UNLOCK(outvp); 729 730 if (err == ENOSYS) { 731 fsess_set_notimpl(mp, FUSE_COPY_FILE_RANGE); 732 fallback: 733 err = vn_generic_copy_file_range(ap->a_invp, ap->a_inoffp, 734 ap->a_outvp, ap->a_outoffp, ap->a_lenp, ap->a_flags, 735 ap->a_incred, ap->a_outcred, ap->a_fsizetd); 736 } 737 738 return (err); 739 } 740 741 static void 742 fdisp_make_mknod_for_fallback( 743 struct fuse_dispatcher *fdip, 744 struct componentname *cnp, 745 struct vnode *dvp, 746 uint64_t parentnid, 747 struct thread *td, 748 struct ucred *cred, 749 mode_t mode, 750 enum fuse_opcode *op) 751 { 752 struct fuse_mknod_in *fmni; 753 754 fdisp_init(fdip, sizeof(*fmni) + cnp->cn_namelen + 1); 755 *op = FUSE_MKNOD; 756 fdisp_make(fdip, *op, vnode_mount(dvp), parentnid, td, cred); 757 fmni = fdip->indata; 758 fmni->mode = mode; 759 fmni->rdev = 0; 760 memcpy((char *)fdip->indata + sizeof(*fmni), cnp->cn_nameptr, 761 cnp->cn_namelen); 762 ((char *)fdip->indata)[sizeof(*fmni) + cnp->cn_namelen] = '\0'; 763 } 764 /* 765 struct vnop_create_args { 766 struct vnode *a_dvp; 767 struct vnode **a_vpp; 768 struct componentname *a_cnp; 769 struct vattr *a_vap; 770 }; 771 */ 772 static int 773 fuse_vnop_create(struct vop_create_args *ap) 774 { 775 struct vnode *dvp = ap->a_dvp; 776 struct vnode **vpp = ap->a_vpp; 777 struct componentname *cnp = ap->a_cnp; 778 struct vattr *vap = ap->a_vap; 779 struct thread *td = cnp->cn_thread; 780 struct ucred *cred = cnp->cn_cred; 781 782 struct fuse_data *data; 783 struct fuse_create_in *fci; 784 struct fuse_entry_out *feo; 785 struct fuse_open_out *foo; 786 struct fuse_dispatcher fdi, fdi2; 787 struct fuse_dispatcher *fdip = &fdi; 788 struct fuse_dispatcher *fdip2 = NULL; 789 790 int err; 791 792 struct mount *mp = vnode_mount(dvp); 793 data = fuse_get_mpdata(mp); 794 uint64_t parentnid = VTOFUD(dvp)->nid; 795 mode_t mode = MAKEIMODE(vap->va_type, vap->va_mode); 796 enum fuse_opcode op; 797 int flags; 798 799 if (fuse_isdeadfs(dvp)) 800 return ENXIO; 801 802 /* FUSE expects sockets to be created with FUSE_MKNOD */ 803 if (vap->va_type == VSOCK) 804 return fuse_internal_mknod(dvp, vpp, cnp, vap); 805 806 /* 807 * VOP_CREATE doesn't tell us the open(2) flags, so we guess. Only a 808 * writable mode makes sense, and we might as well include readability 809 * too. 810 */ 811 flags = O_RDWR; 812 813 bzero(&fdi, sizeof(fdi)); 814 815 if (vap->va_type != VREG) 816 return (EINVAL); 817 818 if (fsess_not_impl(mp, FUSE_CREATE) || vap->va_type == VSOCK) { 819 /* Fallback to FUSE_MKNOD/FUSE_OPEN */ 820 fdisp_make_mknod_for_fallback(fdip, cnp, dvp, parentnid, td, 821 cred, mode, &op); 822 } else { 823 /* Use FUSE_CREATE */ 824 size_t insize; 825 826 op = FUSE_CREATE; 827 fdisp_init(fdip, sizeof(*fci) + cnp->cn_namelen + 1); 828 fdisp_make(fdip, op, vnode_mount(dvp), parentnid, td, cred); 829 fci = fdip->indata; 830 fci->mode = mode; 831 fci->flags = O_CREAT | flags; 832 if (fuse_libabi_geq(data, 7, 12)) { 833 insize = sizeof(*fci); 834 fci->umask = td->td_proc->p_pd->pd_cmask; 835 } else { 836 insize = sizeof(struct fuse_open_in); 837 } 838 839 memcpy((char *)fdip->indata + insize, cnp->cn_nameptr, 840 cnp->cn_namelen); 841 ((char *)fdip->indata)[insize + cnp->cn_namelen] = '\0'; 842 } 843 844 err = fdisp_wait_answ(fdip); 845 846 if (err) { 847 if (err == ENOSYS && op == FUSE_CREATE) { 848 fsess_set_notimpl(mp, FUSE_CREATE); 849 fdisp_destroy(fdip); 850 fdisp_make_mknod_for_fallback(fdip, cnp, dvp, 851 parentnid, td, cred, mode, &op); 852 err = fdisp_wait_answ(fdip); 853 } 854 if (err) 855 goto out; 856 } 857 858 feo = fdip->answ; 859 860 if ((err = fuse_internal_checkentry(feo, vap->va_type))) { 861 goto out; 862 } 863 864 if (op == FUSE_CREATE) { 865 foo = (struct fuse_open_out*)(feo + 1); 866 } else { 867 /* Issue a separate FUSE_OPEN */ 868 struct fuse_open_in *foi; 869 870 fdip2 = &fdi2; 871 fdisp_init(fdip2, sizeof(*foi)); 872 fdisp_make(fdip2, FUSE_OPEN, vnode_mount(dvp), feo->nodeid, td, 873 cred); 874 foi = fdip2->indata; 875 foi->flags = flags; 876 err = fdisp_wait_answ(fdip2); 877 if (err) 878 goto out; 879 foo = fdip2->answ; 880 } 881 err = fuse_vnode_get(mp, feo, feo->nodeid, dvp, vpp, cnp, vap->va_type); 882 if (err) { 883 struct fuse_release_in *fri; 884 uint64_t nodeid = feo->nodeid; 885 uint64_t fh_id = foo->fh; 886 887 fdisp_init(fdip, sizeof(*fri)); 888 fdisp_make(fdip, FUSE_RELEASE, mp, nodeid, td, cred); 889 fri = fdip->indata; 890 fri->fh = fh_id; 891 fri->flags = flags; 892 fuse_insert_callback(fdip->tick, fuse_internal_forget_callback); 893 fuse_insert_message(fdip->tick, false); 894 goto out; 895 } 896 ASSERT_VOP_ELOCKED(*vpp, "fuse_vnop_create"); 897 fuse_internal_cache_attrs(*vpp, &feo->attr, feo->attr_valid, 898 feo->attr_valid_nsec, NULL); 899 900 fuse_filehandle_init(*vpp, FUFH_RDWR, NULL, td, cred, foo); 901 fuse_vnode_open(*vpp, foo->open_flags, td); 902 /* 903 * Purge the parent's attribute cache because the daemon should've 904 * updated its mtime and ctime 905 */ 906 fuse_vnode_clear_attr_cache(dvp); 907 cache_purge_negative(dvp); 908 909 out: 910 if (fdip2) 911 fdisp_destroy(fdip2); 912 fdisp_destroy(fdip); 913 return err; 914 } 915 916 /* 917 struct vnop_fdatasync_args { 918 struct vop_generic_args a_gen; 919 struct vnode * a_vp; 920 struct thread * a_td; 921 }; 922 */ 923 static int 924 fuse_vnop_fdatasync(struct vop_fdatasync_args *ap) 925 { 926 struct vnode *vp = ap->a_vp; 927 struct thread *td = ap->a_td; 928 int waitfor = MNT_WAIT; 929 930 int err = 0; 931 932 if (fuse_isdeadfs(vp)) { 933 return 0; 934 } 935 if ((err = vop_stdfdatasync_buf(ap))) 936 return err; 937 938 return fuse_internal_fsync(vp, td, waitfor, true); 939 } 940 941 /* 942 struct vnop_fsync_args { 943 struct vop_generic_args a_gen; 944 struct vnode * a_vp; 945 int a_waitfor; 946 struct thread * a_td; 947 }; 948 */ 949 static int 950 fuse_vnop_fsync(struct vop_fsync_args *ap) 951 { 952 struct vnode *vp = ap->a_vp; 953 struct thread *td = ap->a_td; 954 int waitfor = ap->a_waitfor; 955 int err = 0; 956 957 if (fuse_isdeadfs(vp)) { 958 return 0; 959 } 960 if ((err = vop_stdfsync(ap))) 961 return err; 962 963 return fuse_internal_fsync(vp, td, waitfor, false); 964 } 965 966 /* 967 struct vnop_getattr_args { 968 struct vnode *a_vp; 969 struct vattr *a_vap; 970 struct ucred *a_cred; 971 struct thread *a_td; 972 }; 973 */ 974 static int 975 fuse_vnop_getattr(struct vop_getattr_args *ap) 976 { 977 struct vnode *vp = ap->a_vp; 978 struct vattr *vap = ap->a_vap; 979 struct ucred *cred = ap->a_cred; 980 struct thread *td = curthread; 981 982 int err = 0; 983 int dataflags; 984 985 dataflags = fuse_get_mpdata(vnode_mount(vp))->dataflags; 986 987 /* Note that we are not bailing out on a dead file system just yet. */ 988 989 if (!(dataflags & FSESS_INITED)) { 990 if (!vnode_isvroot(vp)) { 991 fdata_set_dead(fuse_get_mpdata(vnode_mount(vp))); 992 err = ENOTCONN; 993 return err; 994 } else { 995 goto fake; 996 } 997 } 998 err = fuse_internal_getattr(vp, vap, cred, td); 999 if (err == ENOTCONN && vnode_isvroot(vp)) { 1000 /* see comment in fuse_vfsop_statfs() */ 1001 goto fake; 1002 } else { 1003 return err; 1004 } 1005 1006 fake: 1007 bzero(vap, sizeof(*vap)); 1008 vap->va_type = vnode_vtype(vp); 1009 1010 return 0; 1011 } 1012 1013 /* 1014 struct vnop_inactive_args { 1015 struct vnode *a_vp; 1016 }; 1017 */ 1018 static int 1019 fuse_vnop_inactive(struct vop_inactive_args *ap) 1020 { 1021 struct vnode *vp = ap->a_vp; 1022 struct thread *td = curthread; 1023 1024 struct fuse_vnode_data *fvdat = VTOFUD(vp); 1025 struct fuse_filehandle *fufh, *fufh_tmp; 1026 1027 int need_flush = 1; 1028 1029 LIST_FOREACH_SAFE(fufh, &fvdat->handles, next, fufh_tmp) { 1030 if (need_flush && vp->v_type == VREG) { 1031 if ((VTOFUD(vp)->flag & FN_SIZECHANGE) != 0) { 1032 fuse_vnode_savesize(vp, NULL, 0); 1033 } 1034 if ((fvdat->flag & FN_REVOKED) != 0) 1035 fuse_io_invalbuf(vp, td); 1036 else 1037 fuse_io_flushbuf(vp, MNT_WAIT, td); 1038 need_flush = 0; 1039 } 1040 fuse_filehandle_close(vp, fufh, td, NULL); 1041 } 1042 1043 if ((fvdat->flag & FN_REVOKED) != 0) 1044 vrecycle(vp); 1045 1046 return 0; 1047 } 1048 1049 /* 1050 struct vnop_ioctl_args { 1051 struct vnode *a_vp; 1052 u_long a_command; 1053 caddr_t a_data; 1054 int a_fflag; 1055 struct ucred *a_cred; 1056 struct thread *a_td; 1057 }; 1058 */ 1059 static int 1060 fuse_vnop_ioctl(struct vop_ioctl_args *ap) 1061 { 1062 struct vnode *vp = ap->a_vp; 1063 struct mount *mp = vnode_mount(vp); 1064 struct ucred *cred = ap->a_cred; 1065 off_t *offp; 1066 pid_t pid = ap->a_td->td_proc->p_pid; 1067 int err; 1068 1069 switch (ap->a_command) { 1070 case FIOSEEKDATA: 1071 case FIOSEEKHOLE: 1072 /* Call FUSE_LSEEK, if we can, or fall back to vop_stdioctl */ 1073 if (fsess_maybe_impl(mp, FUSE_LSEEK)) { 1074 int whence; 1075 1076 offp = ap->a_data; 1077 if (ap->a_command == FIOSEEKDATA) 1078 whence = SEEK_DATA; 1079 else 1080 whence = SEEK_HOLE; 1081 1082 vn_lock(vp, LK_SHARED | LK_RETRY); 1083 err = fuse_vnop_do_lseek(vp, ap->a_td, cred, pid, offp, 1084 whence); 1085 VOP_UNLOCK(vp); 1086 } 1087 if (fsess_not_impl(mp, FUSE_LSEEK)) 1088 err = vop_stdioctl(ap); 1089 break; 1090 default: 1091 /* TODO: implement FUSE_IOCTL */ 1092 err = ENOTTY; 1093 break; 1094 } 1095 return (err); 1096 } 1097 1098 1099 /* 1100 struct vnop_link_args { 1101 struct vnode *a_tdvp; 1102 struct vnode *a_vp; 1103 struct componentname *a_cnp; 1104 }; 1105 */ 1106 static int 1107 fuse_vnop_link(struct vop_link_args *ap) 1108 { 1109 struct vnode *vp = ap->a_vp; 1110 struct vnode *tdvp = ap->a_tdvp; 1111 struct componentname *cnp = ap->a_cnp; 1112 1113 struct vattr *vap = VTOVA(vp); 1114 1115 struct fuse_dispatcher fdi; 1116 struct fuse_entry_out *feo; 1117 struct fuse_link_in fli; 1118 1119 int err; 1120 1121 if (fuse_isdeadfs(vp)) { 1122 return ENXIO; 1123 } 1124 if (vnode_mount(tdvp) != vnode_mount(vp)) { 1125 return EXDEV; 1126 } 1127 1128 /* 1129 * This is a seatbelt check to protect naive userspace filesystems from 1130 * themselves and the limitations of the FUSE IPC protocol. If a 1131 * filesystem does not allow attribute caching, assume it is capable of 1132 * validating that nlink does not overflow. 1133 */ 1134 if (vap != NULL && vap->va_nlink >= FUSE_LINK_MAX) 1135 return EMLINK; 1136 fli.oldnodeid = VTOI(vp); 1137 1138 fdisp_init(&fdi, 0); 1139 fuse_internal_newentry_makerequest(vnode_mount(tdvp), VTOI(tdvp), cnp, 1140 FUSE_LINK, &fli, sizeof(fli), &fdi); 1141 if ((err = fdisp_wait_answ(&fdi))) { 1142 goto out; 1143 } 1144 feo = fdi.answ; 1145 1146 err = fuse_internal_checkentry(feo, vnode_vtype(vp)); 1147 if (!err) { 1148 /* 1149 * Purge the parent's attribute cache because the daemon 1150 * should've updated its mtime and ctime 1151 */ 1152 fuse_vnode_clear_attr_cache(tdvp); 1153 fuse_internal_cache_attrs(vp, &feo->attr, feo->attr_valid, 1154 feo->attr_valid_nsec, NULL); 1155 } 1156 out: 1157 fdisp_destroy(&fdi); 1158 return err; 1159 } 1160 1161 struct fuse_lookup_alloc_arg { 1162 struct fuse_entry_out *feo; 1163 struct componentname *cnp; 1164 uint64_t nid; 1165 enum vtype vtyp; 1166 }; 1167 1168 /* Callback for vn_get_ino */ 1169 static int 1170 fuse_lookup_alloc(struct mount *mp, void *arg, int lkflags, struct vnode **vpp) 1171 { 1172 struct fuse_lookup_alloc_arg *flaa = arg; 1173 1174 return fuse_vnode_get(mp, flaa->feo, flaa->nid, NULL, vpp, flaa->cnp, 1175 flaa->vtyp); 1176 } 1177 1178 SDT_PROBE_DEFINE3(fusefs, , vnops, cache_lookup, 1179 "int", "struct timespec*", "struct timespec*"); 1180 /* 1181 struct vnop_lookup_args { 1182 struct vnodeop_desc *a_desc; 1183 struct vnode *a_dvp; 1184 struct vnode **a_vpp; 1185 struct componentname *a_cnp; 1186 }; 1187 */ 1188 int 1189 fuse_vnop_lookup(struct vop_lookup_args *ap) 1190 { 1191 struct vnode *dvp = ap->a_dvp; 1192 struct vnode **vpp = ap->a_vpp; 1193 struct componentname *cnp = ap->a_cnp; 1194 struct thread *td = cnp->cn_thread; 1195 struct ucred *cred = cnp->cn_cred; 1196 1197 int nameiop = cnp->cn_nameiop; 1198 int flags = cnp->cn_flags; 1199 int wantparent = flags & (LOCKPARENT | WANTPARENT); 1200 int islastcn = flags & ISLASTCN; 1201 struct mount *mp = vnode_mount(dvp); 1202 struct fuse_data *data = fuse_get_mpdata(mp); 1203 int default_permissions = data->dataflags & FSESS_DEFAULT_PERMISSIONS; 1204 1205 int err = 0; 1206 int lookup_err = 0; 1207 struct vnode *vp = NULL; 1208 1209 struct fuse_dispatcher fdi; 1210 bool did_lookup = false; 1211 struct fuse_entry_out *feo = NULL; 1212 enum vtype vtyp; /* vnode type of target */ 1213 off_t filesize; /* filesize of target */ 1214 1215 uint64_t nid; 1216 1217 if (fuse_isdeadfs(dvp)) { 1218 *vpp = NULL; 1219 return ENXIO; 1220 } 1221 if (!vnode_isdir(dvp)) 1222 return ENOTDIR; 1223 1224 if (islastcn && vfs_isrdonly(mp) && (nameiop != LOOKUP)) 1225 return EROFS; 1226 1227 if ((cnp->cn_flags & NOEXECCHECK) != 0) 1228 cnp->cn_flags &= ~NOEXECCHECK; 1229 else if ((err = fuse_internal_access(dvp, VEXEC, td, cred))) 1230 return err; 1231 1232 if (flags & ISDOTDOT) { 1233 KASSERT(VTOFUD(dvp)->flag & FN_PARENT_NID, 1234 ("Looking up .. is TODO")); 1235 nid = VTOFUD(dvp)->parent_nid; 1236 if (nid == 0) 1237 return ENOENT; 1238 /* .. is obviously a directory */ 1239 vtyp = VDIR; 1240 filesize = 0; 1241 } else if (cnp->cn_namelen == 1 && *(cnp->cn_nameptr) == '.') { 1242 nid = VTOI(dvp); 1243 /* . is obviously a directory */ 1244 vtyp = VDIR; 1245 filesize = 0; 1246 } else { 1247 struct timespec now, timeout; 1248 int ncpticks; /* here to accomodate for API contract */ 1249 1250 err = cache_lookup(dvp, vpp, cnp, &timeout, &ncpticks); 1251 getnanouptime(&now); 1252 SDT_PROBE3(fusefs, , vnops, cache_lookup, err, &timeout, &now); 1253 switch (err) { 1254 case -1: /* positive match */ 1255 if (timespeccmp(&timeout, &now, >)) { 1256 counter_u64_add(fuse_lookup_cache_hits, 1); 1257 } else { 1258 /* Cache timeout */ 1259 counter_u64_add(fuse_lookup_cache_misses, 1); 1260 bintime_clear( 1261 &VTOFUD(*vpp)->entry_cache_timeout); 1262 cache_purge(*vpp); 1263 if (dvp != *vpp) 1264 vput(*vpp); 1265 else 1266 vrele(*vpp); 1267 *vpp = NULL; 1268 break; 1269 } 1270 return 0; 1271 1272 case 0: /* no match in cache */ 1273 counter_u64_add(fuse_lookup_cache_misses, 1); 1274 break; 1275 1276 case ENOENT: /* negative match */ 1277 getnanouptime(&now); 1278 if (timespeccmp(&timeout, &now, <=)) { 1279 /* Cache timeout */ 1280 cache_purge_negative(dvp); 1281 break; 1282 } 1283 /* fall through */ 1284 default: 1285 return err; 1286 } 1287 1288 nid = VTOI(dvp); 1289 fdisp_init(&fdi, cnp->cn_namelen + 1); 1290 fdisp_make(&fdi, FUSE_LOOKUP, mp, nid, td, cred); 1291 1292 memcpy(fdi.indata, cnp->cn_nameptr, cnp->cn_namelen); 1293 ((char *)fdi.indata)[cnp->cn_namelen] = '\0'; 1294 lookup_err = fdisp_wait_answ(&fdi); 1295 did_lookup = true; 1296 1297 if (!lookup_err) { 1298 /* lookup call succeeded */ 1299 feo = (struct fuse_entry_out *)fdi.answ; 1300 nid = feo->nodeid; 1301 if (nid == 0) { 1302 /* zero nodeid means ENOENT and cache it */ 1303 struct timespec timeout; 1304 1305 fdi.answ_stat = ENOENT; 1306 lookup_err = ENOENT; 1307 if (cnp->cn_flags & MAKEENTRY) { 1308 fuse_validity_2_timespec(feo, &timeout); 1309 cache_enter_time(dvp, *vpp, cnp, 1310 &timeout, NULL); 1311 } 1312 } else if (nid == FUSE_ROOT_ID) { 1313 lookup_err = EINVAL; 1314 } 1315 vtyp = IFTOVT(feo->attr.mode); 1316 filesize = feo->attr.size; 1317 } 1318 if (lookup_err && (!fdi.answ_stat || lookup_err != ENOENT)) { 1319 fdisp_destroy(&fdi); 1320 return lookup_err; 1321 } 1322 } 1323 /* lookup_err, if non-zero, must be ENOENT at this point */ 1324 1325 if (lookup_err) { 1326 /* Entry not found */ 1327 if ((nameiop == CREATE || nameiop == RENAME) && islastcn) { 1328 if (default_permissions) 1329 err = fuse_internal_access(dvp, VWRITE, td, 1330 cred); 1331 else 1332 err = 0; 1333 if (!err) { 1334 /* 1335 * Set the SAVENAME flag to hold onto the 1336 * pathname for use later in VOP_CREATE or 1337 * VOP_RENAME. 1338 */ 1339 cnp->cn_flags |= SAVENAME; 1340 1341 err = EJUSTRETURN; 1342 } 1343 } else { 1344 err = ENOENT; 1345 } 1346 } else { 1347 /* Entry was found */ 1348 if (flags & ISDOTDOT) { 1349 struct fuse_lookup_alloc_arg flaa; 1350 1351 flaa.nid = nid; 1352 flaa.feo = feo; 1353 flaa.cnp = cnp; 1354 flaa.vtyp = vtyp; 1355 err = vn_vget_ino_gen(dvp, fuse_lookup_alloc, &flaa, 0, 1356 &vp); 1357 *vpp = vp; 1358 } else if (nid == VTOI(dvp)) { 1359 vref(dvp); 1360 *vpp = dvp; 1361 } else { 1362 struct fuse_vnode_data *fvdat; 1363 struct vattr *vap; 1364 1365 err = fuse_vnode_get(vnode_mount(dvp), feo, nid, dvp, 1366 &vp, cnp, vtyp); 1367 if (err) 1368 goto out; 1369 *vpp = vp; 1370 1371 /* 1372 * In the case where we are looking up a FUSE node 1373 * represented by an existing cached vnode, and the 1374 * true size reported by FUSE_LOOKUP doesn't match 1375 * the vnode's cached size, then any cached writes 1376 * beyond the file's current size are lost. 1377 * 1378 * We can get here: 1379 * * following attribute cache expiration, or 1380 * * due a bug in the daemon, or 1381 */ 1382 fvdat = VTOFUD(vp); 1383 if (vnode_isreg(vp) && 1384 ((filesize != fvdat->cached_attrs.va_size && 1385 fvdat->flag & FN_SIZECHANGE) || 1386 ((vap = VTOVA(vp)) && 1387 filesize != vap->va_size))) 1388 { 1389 fvdat->flag &= ~FN_SIZECHANGE; 1390 /* 1391 * The server changed the file's size even 1392 * though we had it cached, or had dirty writes 1393 * in the WB cache! 1394 */ 1395 fuse_warn(data, FSESS_WARN_CACHE_INCOHERENT, 1396 "cache incoherent! " 1397 "To prevent " 1398 "data corruption, disable the data cache " 1399 "by mounting with -o direct_io, or as " 1400 "directed otherwise by your FUSE server's " 1401 "documentation."); 1402 int iosize = fuse_iosize(vp); 1403 v_inval_buf_range(vp, 0, INT64_MAX, iosize); 1404 } 1405 1406 MPASS(feo != NULL); 1407 fuse_internal_cache_attrs(*vpp, &feo->attr, 1408 feo->attr_valid, feo->attr_valid_nsec, NULL); 1409 fuse_validity_2_bintime(feo->entry_valid, 1410 feo->entry_valid_nsec, 1411 &fvdat->entry_cache_timeout); 1412 1413 if ((nameiop == DELETE || nameiop == RENAME) && 1414 islastcn && default_permissions) 1415 { 1416 struct vattr dvattr; 1417 1418 err = fuse_internal_access(dvp, VWRITE, td, 1419 cred); 1420 if (err != 0) 1421 goto out; 1422 /* 1423 * if the parent's sticky bit is set, check 1424 * whether we're allowed to remove the file. 1425 * Need to figure out the vnode locking to make 1426 * this work. 1427 */ 1428 fuse_internal_getattr(dvp, &dvattr, cred, td); 1429 if ((dvattr.va_mode & S_ISTXT) && 1430 fuse_internal_access(dvp, VADMIN, td, 1431 cred) && 1432 fuse_internal_access(*vpp, VADMIN, td, 1433 cred)) { 1434 err = EPERM; 1435 goto out; 1436 } 1437 } 1438 1439 if (islastcn && ( 1440 (nameiop == DELETE) || 1441 (nameiop == RENAME && wantparent))) { 1442 cnp->cn_flags |= SAVENAME; 1443 } 1444 } 1445 } 1446 out: 1447 if (err) { 1448 if (vp != NULL && dvp != vp) 1449 vput(vp); 1450 else if (vp != NULL) 1451 vrele(vp); 1452 *vpp = NULL; 1453 } 1454 if (did_lookup) 1455 fdisp_destroy(&fdi); 1456 1457 return err; 1458 } 1459 1460 /* 1461 struct vnop_mkdir_args { 1462 struct vnode *a_dvp; 1463 struct vnode **a_vpp; 1464 struct componentname *a_cnp; 1465 struct vattr *a_vap; 1466 }; 1467 */ 1468 static int 1469 fuse_vnop_mkdir(struct vop_mkdir_args *ap) 1470 { 1471 struct vnode *dvp = ap->a_dvp; 1472 struct vnode **vpp = ap->a_vpp; 1473 struct componentname *cnp = ap->a_cnp; 1474 struct vattr *vap = ap->a_vap; 1475 1476 struct fuse_mkdir_in fmdi; 1477 1478 if (fuse_isdeadfs(dvp)) { 1479 return ENXIO; 1480 } 1481 fmdi.mode = MAKEIMODE(vap->va_type, vap->va_mode); 1482 fmdi.umask = curthread->td_proc->p_pd->pd_cmask; 1483 1484 return (fuse_internal_newentry(dvp, vpp, cnp, FUSE_MKDIR, &fmdi, 1485 sizeof(fmdi), VDIR)); 1486 } 1487 1488 /* 1489 struct vnop_mknod_args { 1490 struct vnode *a_dvp; 1491 struct vnode **a_vpp; 1492 struct componentname *a_cnp; 1493 struct vattr *a_vap; 1494 }; 1495 */ 1496 static int 1497 fuse_vnop_mknod(struct vop_mknod_args *ap) 1498 { 1499 1500 struct vnode *dvp = ap->a_dvp; 1501 struct vnode **vpp = ap->a_vpp; 1502 struct componentname *cnp = ap->a_cnp; 1503 struct vattr *vap = ap->a_vap; 1504 1505 if (fuse_isdeadfs(dvp)) 1506 return ENXIO; 1507 1508 return fuse_internal_mknod(dvp, vpp, cnp, vap); 1509 } 1510 1511 /* 1512 struct vop_open_args { 1513 struct vnode *a_vp; 1514 int a_mode; 1515 struct ucred *a_cred; 1516 struct thread *a_td; 1517 int a_fdidx; / struct file *a_fp; 1518 }; 1519 */ 1520 static int 1521 fuse_vnop_open(struct vop_open_args *ap) 1522 { 1523 struct vnode *vp = ap->a_vp; 1524 int a_mode = ap->a_mode; 1525 struct thread *td = ap->a_td; 1526 struct ucred *cred = ap->a_cred; 1527 pid_t pid = td->td_proc->p_pid; 1528 struct fuse_vnode_data *fvdat; 1529 1530 if (fuse_isdeadfs(vp)) 1531 return ENXIO; 1532 if (vp->v_type == VCHR || vp->v_type == VBLK || vp->v_type == VFIFO) 1533 return (EOPNOTSUPP); 1534 if ((a_mode & (FREAD | FWRITE | FEXEC)) == 0) 1535 return EINVAL; 1536 1537 fvdat = VTOFUD(vp); 1538 1539 if (fuse_filehandle_validrw(vp, a_mode, cred, pid)) { 1540 fuse_vnode_open(vp, 0, td); 1541 return 0; 1542 } 1543 1544 return fuse_filehandle_open(vp, a_mode, NULL, td, cred); 1545 } 1546 1547 static int 1548 fuse_vnop_pathconf(struct vop_pathconf_args *ap) 1549 { 1550 struct vnode *vp = ap->a_vp; 1551 struct mount *mp; 1552 1553 switch (ap->a_name) { 1554 case _PC_FILESIZEBITS: 1555 *ap->a_retval = 64; 1556 return (0); 1557 case _PC_NAME_MAX: 1558 *ap->a_retval = NAME_MAX; 1559 return (0); 1560 case _PC_LINK_MAX: 1561 *ap->a_retval = MIN(LONG_MAX, FUSE_LINK_MAX); 1562 return (0); 1563 case _PC_SYMLINK_MAX: 1564 *ap->a_retval = MAXPATHLEN; 1565 return (0); 1566 case _PC_NO_TRUNC: 1567 *ap->a_retval = 1; 1568 return (0); 1569 case _PC_MIN_HOLE_SIZE: 1570 /* 1571 * The FUSE protocol provides no mechanism for a server to 1572 * report _PC_MIN_HOLE_SIZE. It's a protocol bug. Instead, 1573 * return EINVAL if the server does not support FUSE_LSEEK, or 1574 * 1 if it does. 1575 */ 1576 mp = vnode_mount(vp); 1577 if (!fsess_is_impl(mp, FUSE_LSEEK) && 1578 !fsess_not_impl(mp, FUSE_LSEEK)) { 1579 off_t offset = 0; 1580 1581 /* Issue a FUSE_LSEEK to find out if it's implemented */ 1582 fuse_vnop_do_lseek(vp, curthread, curthread->td_ucred, 1583 curthread->td_proc->p_pid, &offset, SEEK_DATA); 1584 } 1585 1586 if (fsess_is_impl(mp, FUSE_LSEEK)) { 1587 *ap->a_retval = 1; 1588 return (0); 1589 } else { 1590 /* 1591 * Probably FUSE_LSEEK is not implemented. It might 1592 * be, if the FUSE_LSEEK above returned an error like 1593 * EACCES, but in that case we can't tell, so it's 1594 * safest to report EINVAL anyway. 1595 */ 1596 return (EINVAL); 1597 } 1598 default: 1599 return (vop_stdpathconf(ap)); 1600 } 1601 } 1602 1603 /* 1604 struct vnop_read_args { 1605 struct vnode *a_vp; 1606 struct uio *a_uio; 1607 int a_ioflag; 1608 struct ucred *a_cred; 1609 }; 1610 */ 1611 static int 1612 fuse_vnop_read(struct vop_read_args *ap) 1613 { 1614 struct vnode *vp = ap->a_vp; 1615 struct uio *uio = ap->a_uio; 1616 int ioflag = ap->a_ioflag; 1617 struct ucred *cred = ap->a_cred; 1618 pid_t pid = curthread->td_proc->p_pid; 1619 1620 if (fuse_isdeadfs(vp)) { 1621 return ENXIO; 1622 } 1623 1624 if (VTOFUD(vp)->flag & FN_DIRECTIO) { 1625 ioflag |= IO_DIRECT; 1626 } 1627 1628 return fuse_io_dispatch(vp, uio, ioflag, cred, pid); 1629 } 1630 1631 /* 1632 struct vnop_readdir_args { 1633 struct vnode *a_vp; 1634 struct uio *a_uio; 1635 struct ucred *a_cred; 1636 int *a_eofflag; 1637 int *a_ncookies; 1638 u_long **a_cookies; 1639 }; 1640 */ 1641 static int 1642 fuse_vnop_readdir(struct vop_readdir_args *ap) 1643 { 1644 struct vnode *vp = ap->a_vp; 1645 struct uio *uio = ap->a_uio; 1646 struct ucred *cred = ap->a_cred; 1647 struct fuse_filehandle *fufh = NULL; 1648 struct fuse_iov cookediov; 1649 int err = 0; 1650 u_long *cookies; 1651 off_t startoff; 1652 ssize_t tresid; 1653 int ncookies; 1654 bool closefufh = false; 1655 pid_t pid = curthread->td_proc->p_pid; 1656 1657 if (ap->a_eofflag) 1658 *ap->a_eofflag = 0; 1659 if (fuse_isdeadfs(vp)) { 1660 return ENXIO; 1661 } 1662 if ( /* XXXIP ((uio_iovcnt(uio) > 1)) || */ 1663 (uio_resid(uio) < sizeof(struct dirent))) { 1664 return EINVAL; 1665 } 1666 1667 tresid = uio->uio_resid; 1668 startoff = uio->uio_offset; 1669 err = fuse_filehandle_get_dir(vp, &fufh, cred, pid); 1670 if (err == EBADF && vnode_mount(vp)->mnt_flag & MNT_EXPORTED) { 1671 /* 1672 * nfsd will do VOP_READDIR without first doing VOP_OPEN. We 1673 * must implicitly open the directory here 1674 */ 1675 err = fuse_filehandle_open(vp, FREAD, &fufh, curthread, cred); 1676 if (err == 0) { 1677 /* 1678 * When a directory is opened, it must be read from 1679 * the beginning. Hopefully, the "startoff" still 1680 * exists as an offset cookie for the directory. 1681 * If not, it will read the entire directory without 1682 * returning any entries and just return eof. 1683 */ 1684 uio->uio_offset = 0; 1685 } 1686 closefufh = true; 1687 } 1688 if (err) 1689 return (err); 1690 if (ap->a_ncookies != NULL) { 1691 ncookies = uio->uio_resid / 1692 (offsetof(struct dirent, d_name) + 4) + 1; 1693 cookies = malloc(ncookies * sizeof(*cookies), M_TEMP, M_WAITOK); 1694 *ap->a_ncookies = ncookies; 1695 *ap->a_cookies = cookies; 1696 } else { 1697 ncookies = 0; 1698 cookies = NULL; 1699 } 1700 #define DIRCOOKEDSIZE FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + MAXNAMLEN + 1) 1701 fiov_init(&cookediov, DIRCOOKEDSIZE); 1702 1703 err = fuse_internal_readdir(vp, uio, startoff, fufh, &cookediov, 1704 &ncookies, cookies); 1705 1706 fiov_teardown(&cookediov); 1707 if (closefufh) 1708 fuse_filehandle_close(vp, fufh, curthread, cred); 1709 1710 if (ap->a_ncookies != NULL) { 1711 if (err == 0) { 1712 *ap->a_ncookies -= ncookies; 1713 } else { 1714 free(*ap->a_cookies, M_TEMP); 1715 *ap->a_ncookies = 0; 1716 *ap->a_cookies = NULL; 1717 } 1718 } 1719 if (err == 0 && tresid == uio->uio_resid) 1720 *ap->a_eofflag = 1; 1721 1722 return err; 1723 } 1724 1725 /* 1726 struct vnop_readlink_args { 1727 struct vnode *a_vp; 1728 struct uio *a_uio; 1729 struct ucred *a_cred; 1730 }; 1731 */ 1732 static int 1733 fuse_vnop_readlink(struct vop_readlink_args *ap) 1734 { 1735 struct vnode *vp = ap->a_vp; 1736 struct uio *uio = ap->a_uio; 1737 struct ucred *cred = ap->a_cred; 1738 1739 struct fuse_dispatcher fdi; 1740 int err; 1741 1742 if (fuse_isdeadfs(vp)) { 1743 return ENXIO; 1744 } 1745 if (!vnode_islnk(vp)) { 1746 return EINVAL; 1747 } 1748 fdisp_init(&fdi, 0); 1749 err = fdisp_simple_putget_vp(&fdi, FUSE_READLINK, vp, curthread, cred); 1750 if (err) { 1751 goto out; 1752 } 1753 if (((char *)fdi.answ)[0] == '/' && 1754 fuse_get_mpdata(vnode_mount(vp))->dataflags & FSESS_PUSH_SYMLINKS_IN) { 1755 char *mpth = vnode_mount(vp)->mnt_stat.f_mntonname; 1756 1757 err = uiomove(mpth, strlen(mpth), uio); 1758 } 1759 if (!err) { 1760 err = uiomove(fdi.answ, fdi.iosize, uio); 1761 } 1762 out: 1763 fdisp_destroy(&fdi); 1764 return err; 1765 } 1766 1767 /* 1768 struct vnop_reclaim_args { 1769 struct vnode *a_vp; 1770 }; 1771 */ 1772 static int 1773 fuse_vnop_reclaim(struct vop_reclaim_args *ap) 1774 { 1775 struct vnode *vp = ap->a_vp; 1776 struct thread *td = curthread; 1777 struct fuse_vnode_data *fvdat = VTOFUD(vp); 1778 struct fuse_filehandle *fufh, *fufh_tmp; 1779 1780 if (!fvdat) { 1781 panic("FUSE: no vnode data during recycling"); 1782 } 1783 LIST_FOREACH_SAFE(fufh, &fvdat->handles, next, fufh_tmp) { 1784 printf("FUSE: vnode being reclaimed with open fufh " 1785 "(type=%#x)", fufh->fufh_type); 1786 fuse_filehandle_close(vp, fufh, td, NULL); 1787 } 1788 1789 if (!fuse_isdeadfs(vp) && fvdat->nlookup > 0) { 1790 fuse_internal_forget_send(vnode_mount(vp), td, NULL, VTOI(vp), 1791 fvdat->nlookup); 1792 } 1793 cache_purge(vp); 1794 vfs_hash_remove(vp); 1795 fuse_vnode_destroy(vp); 1796 1797 return 0; 1798 } 1799 1800 /* 1801 struct vnop_remove_args { 1802 struct vnode *a_dvp; 1803 struct vnode *a_vp; 1804 struct componentname *a_cnp; 1805 }; 1806 */ 1807 static int 1808 fuse_vnop_remove(struct vop_remove_args *ap) 1809 { 1810 struct vnode *dvp = ap->a_dvp; 1811 struct vnode *vp = ap->a_vp; 1812 struct componentname *cnp = ap->a_cnp; 1813 1814 int err; 1815 1816 if (fuse_isdeadfs(vp)) { 1817 return ENXIO; 1818 } 1819 if (vnode_isdir(vp)) { 1820 return EPERM; 1821 } 1822 1823 err = fuse_internal_remove(dvp, vp, cnp, FUSE_UNLINK); 1824 1825 return err; 1826 } 1827 1828 /* 1829 struct vnop_rename_args { 1830 struct vnode *a_fdvp; 1831 struct vnode *a_fvp; 1832 struct componentname *a_fcnp; 1833 struct vnode *a_tdvp; 1834 struct vnode *a_tvp; 1835 struct componentname *a_tcnp; 1836 }; 1837 */ 1838 static int 1839 fuse_vnop_rename(struct vop_rename_args *ap) 1840 { 1841 struct vnode *fdvp = ap->a_fdvp; 1842 struct vnode *fvp = ap->a_fvp; 1843 struct componentname *fcnp = ap->a_fcnp; 1844 struct vnode *tdvp = ap->a_tdvp; 1845 struct vnode *tvp = ap->a_tvp; 1846 struct componentname *tcnp = ap->a_tcnp; 1847 struct fuse_data *data; 1848 bool newparent = fdvp != tdvp; 1849 bool isdir = fvp->v_type == VDIR; 1850 int err = 0; 1851 1852 if (fuse_isdeadfs(fdvp)) { 1853 return ENXIO; 1854 } 1855 if (fvp->v_mount != tdvp->v_mount || 1856 (tvp && fvp->v_mount != tvp->v_mount)) { 1857 SDT_PROBE2(fusefs, , vnops, trace, 1, "cross-device rename"); 1858 err = EXDEV; 1859 goto out; 1860 } 1861 cache_purge(fvp); 1862 1863 /* 1864 * FUSE library is expected to check if target directory is not 1865 * under the source directory in the file system tree. 1866 * Linux performs this check at VFS level. 1867 */ 1868 /* 1869 * If source is a directory, and it will get a new parent, user must 1870 * have write permission to it, so ".." can be modified. 1871 */ 1872 data = fuse_get_mpdata(vnode_mount(tdvp)); 1873 if (data->dataflags & FSESS_DEFAULT_PERMISSIONS && isdir && newparent) { 1874 err = fuse_internal_access(fvp, VWRITE, 1875 tcnp->cn_thread, tcnp->cn_cred); 1876 if (err) 1877 goto out; 1878 } 1879 sx_xlock(&data->rename_lock); 1880 err = fuse_internal_rename(fdvp, fcnp, tdvp, tcnp); 1881 if (err == 0) { 1882 if (tdvp != fdvp) 1883 fuse_vnode_setparent(fvp, tdvp); 1884 if (tvp != NULL) 1885 fuse_vnode_setparent(tvp, NULL); 1886 } 1887 sx_unlock(&data->rename_lock); 1888 1889 if (tvp != NULL && tvp != fvp) { 1890 cache_purge(tvp); 1891 } 1892 if (vnode_isdir(fvp)) { 1893 if ((tvp != NULL) && vnode_isdir(tvp)) { 1894 cache_purge(tdvp); 1895 } 1896 cache_purge(fdvp); 1897 } 1898 out: 1899 if (tdvp == tvp) { 1900 vrele(tdvp); 1901 } else { 1902 vput(tdvp); 1903 } 1904 if (tvp != NULL) { 1905 vput(tvp); 1906 } 1907 vrele(fdvp); 1908 vrele(fvp); 1909 1910 return err; 1911 } 1912 1913 /* 1914 struct vnop_rmdir_args { 1915 struct vnode *a_dvp; 1916 struct vnode *a_vp; 1917 struct componentname *a_cnp; 1918 } *ap; 1919 */ 1920 static int 1921 fuse_vnop_rmdir(struct vop_rmdir_args *ap) 1922 { 1923 struct vnode *dvp = ap->a_dvp; 1924 struct vnode *vp = ap->a_vp; 1925 1926 int err; 1927 1928 if (fuse_isdeadfs(vp)) { 1929 return ENXIO; 1930 } 1931 if (VTOFUD(vp) == VTOFUD(dvp)) { 1932 return EINVAL; 1933 } 1934 err = fuse_internal_remove(dvp, vp, ap->a_cnp, FUSE_RMDIR); 1935 1936 return err; 1937 } 1938 1939 /* 1940 struct vnop_setattr_args { 1941 struct vnode *a_vp; 1942 struct vattr *a_vap; 1943 struct ucred *a_cred; 1944 struct thread *a_td; 1945 }; 1946 */ 1947 static int 1948 fuse_vnop_setattr(struct vop_setattr_args *ap) 1949 { 1950 struct vnode *vp = ap->a_vp; 1951 struct vattr *vap = ap->a_vap; 1952 struct ucred *cred = ap->a_cred; 1953 struct thread *td = curthread; 1954 struct mount *mp; 1955 struct fuse_data *data; 1956 struct vattr old_va; 1957 int dataflags; 1958 int err = 0, err2; 1959 accmode_t accmode = 0; 1960 bool checkperm; 1961 bool drop_suid = false; 1962 gid_t cr_gid; 1963 1964 mp = vnode_mount(vp); 1965 data = fuse_get_mpdata(mp); 1966 dataflags = data->dataflags; 1967 checkperm = dataflags & FSESS_DEFAULT_PERMISSIONS; 1968 if (cred->cr_ngroups > 0) 1969 cr_gid = cred->cr_groups[0]; 1970 else 1971 cr_gid = 0; 1972 1973 if (fuse_isdeadfs(vp)) { 1974 return ENXIO; 1975 } 1976 1977 if (vap->va_uid != (uid_t)VNOVAL) { 1978 if (checkperm) { 1979 /* Only root may change a file's owner */ 1980 err = priv_check_cred(cred, PRIV_VFS_CHOWN); 1981 if (err) { 1982 /* As a special case, allow the null chown */ 1983 err2 = fuse_internal_getattr(vp, &old_va, cred, 1984 td); 1985 if (err2) 1986 return (err2); 1987 if (vap->va_uid != old_va.va_uid) 1988 return err; 1989 else 1990 accmode |= VADMIN; 1991 drop_suid = true; 1992 } else 1993 accmode |= VADMIN; 1994 } else 1995 accmode |= VADMIN; 1996 } 1997 if (vap->va_gid != (gid_t)VNOVAL) { 1998 if (checkperm && priv_check_cred(cred, PRIV_VFS_CHOWN)) 1999 drop_suid = true; 2000 if (checkperm && !groupmember(vap->va_gid, cred)) 2001 { 2002 /* 2003 * Non-root users may only chgrp to one of their own 2004 * groups 2005 */ 2006 err = priv_check_cred(cred, PRIV_VFS_CHOWN); 2007 if (err) { 2008 /* As a special case, allow the null chgrp */ 2009 err2 = fuse_internal_getattr(vp, &old_va, cred, 2010 td); 2011 if (err2) 2012 return (err2); 2013 if (vap->va_gid != old_va.va_gid) 2014 return err; 2015 accmode |= VADMIN; 2016 } else 2017 accmode |= VADMIN; 2018 } else 2019 accmode |= VADMIN; 2020 } 2021 if (vap->va_size != VNOVAL) { 2022 switch (vp->v_type) { 2023 case VDIR: 2024 return (EISDIR); 2025 case VLNK: 2026 case VREG: 2027 if (vfs_isrdonly(mp)) 2028 return (EROFS); 2029 break; 2030 default: 2031 /* 2032 * According to POSIX, the result is unspecified 2033 * for file types other than regular files, 2034 * directories and shared memory objects. We 2035 * don't support shared memory objects in the file 2036 * system, and have dubious support for truncating 2037 * symlinks. Just ignore the request in other cases. 2038 */ 2039 return (0); 2040 } 2041 /* Don't set accmode. Permission to trunc is checked upstack */ 2042 } 2043 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 2044 if (vap->va_vaflags & VA_UTIMES_NULL) 2045 accmode |= VWRITE; 2046 else 2047 accmode |= VADMIN; 2048 } 2049 if (drop_suid) { 2050 if (vap->va_mode != (mode_t)VNOVAL) 2051 vap->va_mode &= ~(S_ISUID | S_ISGID); 2052 else { 2053 err = fuse_internal_getattr(vp, &old_va, cred, td); 2054 if (err) 2055 return (err); 2056 vap->va_mode = old_va.va_mode & ~(S_ISUID | S_ISGID); 2057 } 2058 } 2059 if (vap->va_mode != (mode_t)VNOVAL) { 2060 /* Only root may set the sticky bit on non-directories */ 2061 if (checkperm && vp->v_type != VDIR && (vap->va_mode & S_ISTXT) 2062 && priv_check_cred(cred, PRIV_VFS_STICKYFILE)) 2063 return EFTYPE; 2064 if (checkperm && (vap->va_mode & S_ISGID)) { 2065 err = fuse_internal_getattr(vp, &old_va, cred, td); 2066 if (err) 2067 return (err); 2068 if (!groupmember(old_va.va_gid, cred)) { 2069 err = priv_check_cred(cred, PRIV_VFS_SETGID); 2070 if (err) 2071 return (err); 2072 } 2073 } 2074 accmode |= VADMIN; 2075 } 2076 2077 if (vfs_isrdonly(mp)) 2078 return EROFS; 2079 2080 if (checkperm) { 2081 err = fuse_internal_access(vp, accmode, td, cred); 2082 } else { 2083 err = 0; 2084 } 2085 if (err) 2086 return err; 2087 else 2088 return fuse_internal_setattr(vp, vap, td, cred); 2089 } 2090 2091 /* 2092 struct vnop_strategy_args { 2093 struct vnode *a_vp; 2094 struct buf *a_bp; 2095 }; 2096 */ 2097 static int 2098 fuse_vnop_strategy(struct vop_strategy_args *ap) 2099 { 2100 struct vnode *vp = ap->a_vp; 2101 struct buf *bp = ap->a_bp; 2102 2103 if (!vp || fuse_isdeadfs(vp)) { 2104 bp->b_ioflags |= BIO_ERROR; 2105 bp->b_error = ENXIO; 2106 bufdone(bp); 2107 return 0; 2108 } 2109 2110 /* 2111 * VOP_STRATEGY always returns zero and signals error via bp->b_ioflags. 2112 * fuse_io_strategy sets bp's error fields 2113 */ 2114 (void)fuse_io_strategy(vp, bp); 2115 2116 return 0; 2117 } 2118 2119 /* 2120 struct vnop_symlink_args { 2121 struct vnode *a_dvp; 2122 struct vnode **a_vpp; 2123 struct componentname *a_cnp; 2124 struct vattr *a_vap; 2125 char *a_target; 2126 }; 2127 */ 2128 static int 2129 fuse_vnop_symlink(struct vop_symlink_args *ap) 2130 { 2131 struct vnode *dvp = ap->a_dvp; 2132 struct vnode **vpp = ap->a_vpp; 2133 struct componentname *cnp = ap->a_cnp; 2134 const char *target = ap->a_target; 2135 2136 struct fuse_dispatcher fdi; 2137 2138 int err; 2139 size_t len; 2140 2141 if (fuse_isdeadfs(dvp)) { 2142 return ENXIO; 2143 } 2144 /* 2145 * Unlike the other creator type calls, here we have to create a message 2146 * where the name of the new entry comes first, and the data describing 2147 * the entry comes second. 2148 * Hence we can't rely on our handy fuse_internal_newentry() routine, 2149 * but put together the message manually and just call the core part. 2150 */ 2151 2152 len = strlen(target) + 1; 2153 fdisp_init(&fdi, len + cnp->cn_namelen + 1); 2154 fdisp_make_vp(&fdi, FUSE_SYMLINK, dvp, curthread, NULL); 2155 2156 memcpy(fdi.indata, cnp->cn_nameptr, cnp->cn_namelen); 2157 ((char *)fdi.indata)[cnp->cn_namelen] = '\0'; 2158 memcpy((char *)fdi.indata + cnp->cn_namelen + 1, target, len); 2159 2160 err = fuse_internal_newentry_core(dvp, vpp, cnp, VLNK, &fdi); 2161 fdisp_destroy(&fdi); 2162 return err; 2163 } 2164 2165 /* 2166 struct vnop_write_args { 2167 struct vnode *a_vp; 2168 struct uio *a_uio; 2169 int a_ioflag; 2170 struct ucred *a_cred; 2171 }; 2172 */ 2173 static int 2174 fuse_vnop_write(struct vop_write_args *ap) 2175 { 2176 struct vnode *vp = ap->a_vp; 2177 struct uio *uio = ap->a_uio; 2178 int ioflag = ap->a_ioflag; 2179 struct ucred *cred = ap->a_cred; 2180 pid_t pid = curthread->td_proc->p_pid; 2181 2182 if (fuse_isdeadfs(vp)) { 2183 return ENXIO; 2184 } 2185 2186 if (VTOFUD(vp)->flag & FN_DIRECTIO) { 2187 ioflag |= IO_DIRECT; 2188 } 2189 2190 return fuse_io_dispatch(vp, uio, ioflag, cred, pid); 2191 } 2192 2193 static daddr_t 2194 fuse_gbp_getblkno(struct vnode *vp, vm_ooffset_t off) 2195 { 2196 const int biosize = fuse_iosize(vp); 2197 2198 return (off / biosize); 2199 } 2200 2201 static int 2202 fuse_gbp_getblksz(struct vnode *vp, daddr_t lbn, long *blksz) 2203 { 2204 off_t filesize; 2205 int err; 2206 const int biosize = fuse_iosize(vp); 2207 2208 err = fuse_vnode_size(vp, &filesize, NULL, NULL); 2209 if (err) { 2210 /* This will turn into a SIGBUS */ 2211 return (EIO); 2212 } else if ((off_t)lbn * biosize >= filesize) { 2213 *blksz = 0; 2214 } else if ((off_t)(lbn + 1) * biosize > filesize) { 2215 *blksz = filesize - (off_t)lbn *biosize; 2216 } else { 2217 *blksz = biosize; 2218 } 2219 return (0); 2220 } 2221 2222 /* 2223 struct vnop_getpages_args { 2224 struct vnode *a_vp; 2225 vm_page_t *a_m; 2226 int a_count; 2227 int a_reqpage; 2228 }; 2229 */ 2230 static int 2231 fuse_vnop_getpages(struct vop_getpages_args *ap) 2232 { 2233 struct vnode *vp = ap->a_vp; 2234 2235 if (!fsess_opt_mmap(vnode_mount(vp))) { 2236 SDT_PROBE2(fusefs, , vnops, trace, 1, 2237 "called on non-cacheable vnode??\n"); 2238 return (VM_PAGER_ERROR); 2239 } 2240 2241 return (vfs_bio_getpages(vp, ap->a_m, ap->a_count, ap->a_rbehind, 2242 ap->a_rahead, fuse_gbp_getblkno, fuse_gbp_getblksz)); 2243 } 2244 2245 static const char extattr_namespace_separator = '.'; 2246 2247 /* 2248 struct vop_getextattr_args { 2249 struct vop_generic_args a_gen; 2250 struct vnode *a_vp; 2251 int a_attrnamespace; 2252 const char *a_name; 2253 struct uio *a_uio; 2254 size_t *a_size; 2255 struct ucred *a_cred; 2256 struct thread *a_td; 2257 }; 2258 */ 2259 static int 2260 fuse_vnop_getextattr(struct vop_getextattr_args *ap) 2261 { 2262 struct vnode *vp = ap->a_vp; 2263 struct uio *uio = ap->a_uio; 2264 struct fuse_dispatcher fdi; 2265 struct fuse_getxattr_in *get_xattr_in; 2266 struct fuse_getxattr_out *get_xattr_out; 2267 struct mount *mp = vnode_mount(vp); 2268 struct thread *td = ap->a_td; 2269 struct ucred *cred = ap->a_cred; 2270 char *prefix; 2271 char *attr_str; 2272 size_t len; 2273 int err; 2274 2275 if (fuse_isdeadfs(vp)) 2276 return (ENXIO); 2277 2278 if (fsess_not_impl(mp, FUSE_GETXATTR)) 2279 return EOPNOTSUPP; 2280 2281 err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td, VREAD); 2282 if (err) 2283 return err; 2284 2285 /* Default to looking for user attributes. */ 2286 if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM) 2287 prefix = EXTATTR_NAMESPACE_SYSTEM_STRING; 2288 else 2289 prefix = EXTATTR_NAMESPACE_USER_STRING; 2290 2291 len = strlen(prefix) + sizeof(extattr_namespace_separator) + 2292 strlen(ap->a_name) + 1; 2293 2294 fdisp_init(&fdi, len + sizeof(*get_xattr_in)); 2295 fdisp_make_vp(&fdi, FUSE_GETXATTR, vp, td, cred); 2296 2297 get_xattr_in = fdi.indata; 2298 /* 2299 * Check to see whether we're querying the available size or 2300 * issuing the actual request. If we pass in 0, we get back struct 2301 * fuse_getxattr_out. If we pass in a non-zero size, we get back 2302 * that much data, without the struct fuse_getxattr_out header. 2303 */ 2304 if (uio == NULL) 2305 get_xattr_in->size = 0; 2306 else 2307 get_xattr_in->size = uio->uio_resid; 2308 2309 attr_str = (char *)fdi.indata + sizeof(*get_xattr_in); 2310 snprintf(attr_str, len, "%s%c%s", prefix, extattr_namespace_separator, 2311 ap->a_name); 2312 2313 err = fdisp_wait_answ(&fdi); 2314 if (err != 0) { 2315 if (err == ENOSYS) { 2316 fsess_set_notimpl(mp, FUSE_GETXATTR); 2317 err = EOPNOTSUPP; 2318 } 2319 goto out; 2320 } 2321 2322 get_xattr_out = fdi.answ; 2323 2324 if (ap->a_size != NULL) 2325 *ap->a_size = get_xattr_out->size; 2326 2327 if (uio != NULL) 2328 err = uiomove(fdi.answ, fdi.iosize, uio); 2329 2330 out: 2331 fdisp_destroy(&fdi); 2332 return (err); 2333 } 2334 2335 /* 2336 struct vop_setextattr_args { 2337 struct vop_generic_args a_gen; 2338 struct vnode *a_vp; 2339 int a_attrnamespace; 2340 const char *a_name; 2341 struct uio *a_uio; 2342 struct ucred *a_cred; 2343 struct thread *a_td; 2344 }; 2345 */ 2346 static int 2347 fuse_vnop_setextattr(struct vop_setextattr_args *ap) 2348 { 2349 struct vnode *vp = ap->a_vp; 2350 struct uio *uio = ap->a_uio; 2351 struct fuse_dispatcher fdi; 2352 struct fuse_setxattr_in *set_xattr_in; 2353 struct mount *mp = vnode_mount(vp); 2354 struct thread *td = ap->a_td; 2355 struct ucred *cred = ap->a_cred; 2356 char *prefix; 2357 size_t len; 2358 char *attr_str; 2359 int err; 2360 2361 if (fuse_isdeadfs(vp)) 2362 return (ENXIO); 2363 2364 if (fsess_not_impl(mp, FUSE_SETXATTR)) 2365 return EOPNOTSUPP; 2366 2367 if (vfs_isrdonly(mp)) 2368 return EROFS; 2369 2370 /* Deleting xattrs must use VOP_DELETEEXTATTR instead */ 2371 if (ap->a_uio == NULL) { 2372 /* 2373 * If we got here as fallback from VOP_DELETEEXTATTR, then 2374 * return EOPNOTSUPP. 2375 */ 2376 if (fsess_not_impl(mp, FUSE_REMOVEXATTR)) 2377 return (EOPNOTSUPP); 2378 else 2379 return (EINVAL); 2380 } 2381 2382 err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td, 2383 VWRITE); 2384 if (err) 2385 return err; 2386 2387 /* Default to looking for user attributes. */ 2388 if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM) 2389 prefix = EXTATTR_NAMESPACE_SYSTEM_STRING; 2390 else 2391 prefix = EXTATTR_NAMESPACE_USER_STRING; 2392 2393 len = strlen(prefix) + sizeof(extattr_namespace_separator) + 2394 strlen(ap->a_name) + 1; 2395 2396 fdisp_init(&fdi, len + sizeof(*set_xattr_in) + uio->uio_resid); 2397 fdisp_make_vp(&fdi, FUSE_SETXATTR, vp, td, cred); 2398 2399 set_xattr_in = fdi.indata; 2400 set_xattr_in->size = uio->uio_resid; 2401 2402 attr_str = (char *)fdi.indata + sizeof(*set_xattr_in); 2403 snprintf(attr_str, len, "%s%c%s", prefix, extattr_namespace_separator, 2404 ap->a_name); 2405 2406 err = uiomove((char *)fdi.indata + sizeof(*set_xattr_in) + len, 2407 uio->uio_resid, uio); 2408 if (err != 0) { 2409 goto out; 2410 } 2411 2412 err = fdisp_wait_answ(&fdi); 2413 2414 if (err == ENOSYS) { 2415 fsess_set_notimpl(mp, FUSE_SETXATTR); 2416 err = EOPNOTSUPP; 2417 } 2418 if (err == ERESTART) { 2419 /* Can't restart after calling uiomove */ 2420 err = EINTR; 2421 } 2422 2423 out: 2424 fdisp_destroy(&fdi); 2425 return (err); 2426 } 2427 2428 /* 2429 * The Linux / FUSE extended attribute list is simply a collection of 2430 * NUL-terminated strings. The FreeBSD extended attribute list is a single 2431 * byte length followed by a non-NUL terminated string. So, this allows 2432 * conversion of the Linux / FUSE format to the FreeBSD format in place. 2433 * Linux attribute names are reported with the namespace as a prefix (e.g. 2434 * "user.attribute_name"), but in FreeBSD they are reported without the 2435 * namespace prefix (e.g. "attribute_name"). So, we're going from: 2436 * 2437 * user.attr_name1\0user.attr_name2\0 2438 * 2439 * to: 2440 * 2441 * <num>attr_name1<num>attr_name2 2442 * 2443 * Where "<num>" is a single byte number of characters in the attribute name. 2444 * 2445 * Args: 2446 * prefix - exattr namespace prefix string 2447 * list, list_len - input list with namespace prefixes 2448 * bsd_list, bsd_list_len - output list compatible with bsd vfs 2449 */ 2450 static int 2451 fuse_xattrlist_convert(char *prefix, const char *list, int list_len, 2452 char *bsd_list, int *bsd_list_len) 2453 { 2454 int len, pos, dist_to_next, prefix_len; 2455 2456 pos = 0; 2457 *bsd_list_len = 0; 2458 prefix_len = strlen(prefix); 2459 2460 while (pos < list_len && list[pos] != '\0') { 2461 dist_to_next = strlen(&list[pos]) + 1; 2462 if (bcmp(&list[pos], prefix, prefix_len) == 0 && 2463 list[pos + prefix_len] == extattr_namespace_separator) { 2464 len = dist_to_next - 2465 (prefix_len + sizeof(extattr_namespace_separator)) - 1; 2466 if (len >= EXTATTR_MAXNAMELEN) 2467 return (ENAMETOOLONG); 2468 2469 bsd_list[*bsd_list_len] = len; 2470 memcpy(&bsd_list[*bsd_list_len + 1], 2471 &list[pos + prefix_len + 2472 sizeof(extattr_namespace_separator)], len); 2473 2474 *bsd_list_len += len + 1; 2475 } 2476 2477 pos += dist_to_next; 2478 } 2479 2480 return (0); 2481 } 2482 2483 /* 2484 * List extended attributes 2485 * 2486 * The FUSE_LISTXATTR operation is based on Linux's listxattr(2) syscall, which 2487 * has a number of differences compared to its FreeBSD equivalent, 2488 * extattr_list_file: 2489 * 2490 * - FUSE_LISTXATTR returns all extended attributes across all namespaces, 2491 * whereas listxattr(2) only returns attributes for a single namespace 2492 * - FUSE_LISTXATTR prepends each attribute name with "namespace." 2493 * - If the provided buffer is not large enough to hold the result, 2494 * FUSE_LISTXATTR should return ERANGE, whereas listxattr is expected to 2495 * return as many results as will fit. 2496 */ 2497 /* 2498 struct vop_listextattr_args { 2499 struct vop_generic_args a_gen; 2500 struct vnode *a_vp; 2501 int a_attrnamespace; 2502 struct uio *a_uio; 2503 size_t *a_size; 2504 struct ucred *a_cred; 2505 struct thread *a_td; 2506 }; 2507 */ 2508 static int 2509 fuse_vnop_listextattr(struct vop_listextattr_args *ap) 2510 { 2511 struct vnode *vp = ap->a_vp; 2512 struct uio *uio = ap->a_uio; 2513 struct fuse_dispatcher fdi; 2514 struct fuse_listxattr_in *list_xattr_in; 2515 struct fuse_listxattr_out *list_xattr_out; 2516 struct mount *mp = vnode_mount(vp); 2517 struct thread *td = ap->a_td; 2518 struct ucred *cred = ap->a_cred; 2519 char *prefix; 2520 char *bsd_list = NULL; 2521 char *linux_list; 2522 int bsd_list_len; 2523 int linux_list_len; 2524 int err; 2525 2526 if (fuse_isdeadfs(vp)) 2527 return (ENXIO); 2528 2529 if (fsess_not_impl(mp, FUSE_LISTXATTR)) 2530 return EOPNOTSUPP; 2531 2532 err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td, VREAD); 2533 if (err) 2534 return err; 2535 2536 /* 2537 * Add space for a NUL and the period separator if enabled. 2538 * Default to looking for user attributes. 2539 */ 2540 if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM) 2541 prefix = EXTATTR_NAMESPACE_SYSTEM_STRING; 2542 else 2543 prefix = EXTATTR_NAMESPACE_USER_STRING; 2544 2545 fdisp_init(&fdi, sizeof(*list_xattr_in)); 2546 fdisp_make_vp(&fdi, FUSE_LISTXATTR, vp, td, cred); 2547 2548 /* 2549 * Retrieve Linux / FUSE compatible list size. 2550 */ 2551 list_xattr_in = fdi.indata; 2552 list_xattr_in->size = 0; 2553 2554 err = fdisp_wait_answ(&fdi); 2555 if (err != 0) { 2556 if (err == ENOSYS) { 2557 fsess_set_notimpl(mp, FUSE_LISTXATTR); 2558 err = EOPNOTSUPP; 2559 } 2560 goto out; 2561 } 2562 2563 list_xattr_out = fdi.answ; 2564 linux_list_len = list_xattr_out->size; 2565 if (linux_list_len == 0) { 2566 if (ap->a_size != NULL) 2567 *ap->a_size = linux_list_len; 2568 goto out; 2569 } 2570 2571 /* 2572 * Retrieve Linux / FUSE compatible list values. 2573 */ 2574 fdisp_refresh_vp(&fdi, FUSE_LISTXATTR, vp, td, cred); 2575 list_xattr_in = fdi.indata; 2576 list_xattr_in->size = linux_list_len; 2577 2578 err = fdisp_wait_answ(&fdi); 2579 if (err == ERANGE) { 2580 /* 2581 * Race detected. The attribute list must've grown since the 2582 * first FUSE_LISTXATTR call. Start over. Go all the way back 2583 * to userland so we can process signals, if necessary, before 2584 * restarting. 2585 */ 2586 err = ERESTART; 2587 goto out; 2588 } else if (err != 0) 2589 goto out; 2590 2591 linux_list = fdi.answ; 2592 /* FUSE doesn't allow the server to return more data than requested */ 2593 if (fdi.iosize > linux_list_len) { 2594 struct fuse_data *data = fuse_get_mpdata(mp); 2595 2596 fuse_warn(data, FSESS_WARN_LSEXTATTR_LONG, 2597 "server returned " 2598 "more extended attribute data than requested; " 2599 "should've returned ERANGE instead."); 2600 } else { 2601 /* But returning less data is fine */ 2602 linux_list_len = fdi.iosize; 2603 } 2604 2605 /* 2606 * Retrieve the BSD compatible list values. 2607 * The Linux / FUSE attribute list format isn't the same 2608 * as FreeBSD's format. So we need to transform it into 2609 * FreeBSD's format before giving it to the user. 2610 */ 2611 bsd_list = malloc(linux_list_len, M_TEMP, M_WAITOK); 2612 err = fuse_xattrlist_convert(prefix, linux_list, linux_list_len, 2613 bsd_list, &bsd_list_len); 2614 if (err != 0) 2615 goto out; 2616 2617 if (ap->a_size != NULL) 2618 *ap->a_size = bsd_list_len; 2619 2620 if (uio != NULL) 2621 err = uiomove(bsd_list, bsd_list_len, uio); 2622 2623 out: 2624 free(bsd_list, M_TEMP); 2625 fdisp_destroy(&fdi); 2626 return (err); 2627 } 2628 2629 /* 2630 struct vop_deleteextattr_args { 2631 struct vop_generic_args a_gen; 2632 struct vnode *a_vp; 2633 int a_attrnamespace; 2634 const char *a_name; 2635 struct ucred *a_cred; 2636 struct thread *a_td; 2637 }; 2638 */ 2639 static int 2640 fuse_vnop_deleteextattr(struct vop_deleteextattr_args *ap) 2641 { 2642 struct vnode *vp = ap->a_vp; 2643 struct fuse_dispatcher fdi; 2644 struct mount *mp = vnode_mount(vp); 2645 struct thread *td = ap->a_td; 2646 struct ucred *cred = ap->a_cred; 2647 char *prefix; 2648 size_t len; 2649 char *attr_str; 2650 int err; 2651 2652 if (fuse_isdeadfs(vp)) 2653 return (ENXIO); 2654 2655 if (fsess_not_impl(mp, FUSE_REMOVEXATTR)) 2656 return EOPNOTSUPP; 2657 2658 if (vfs_isrdonly(mp)) 2659 return EROFS; 2660 2661 err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td, 2662 VWRITE); 2663 if (err) 2664 return err; 2665 2666 /* Default to looking for user attributes. */ 2667 if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM) 2668 prefix = EXTATTR_NAMESPACE_SYSTEM_STRING; 2669 else 2670 prefix = EXTATTR_NAMESPACE_USER_STRING; 2671 2672 len = strlen(prefix) + sizeof(extattr_namespace_separator) + 2673 strlen(ap->a_name) + 1; 2674 2675 fdisp_init(&fdi, len); 2676 fdisp_make_vp(&fdi, FUSE_REMOVEXATTR, vp, td, cred); 2677 2678 attr_str = fdi.indata; 2679 snprintf(attr_str, len, "%s%c%s", prefix, extattr_namespace_separator, 2680 ap->a_name); 2681 2682 err = fdisp_wait_answ(&fdi); 2683 if (err == ENOSYS) { 2684 fsess_set_notimpl(mp, FUSE_REMOVEXATTR); 2685 err = EOPNOTSUPP; 2686 } 2687 2688 fdisp_destroy(&fdi); 2689 return (err); 2690 } 2691 2692 /* 2693 struct vnop_print_args { 2694 struct vnode *a_vp; 2695 }; 2696 */ 2697 static int 2698 fuse_vnop_print(struct vop_print_args *ap) 2699 { 2700 struct fuse_vnode_data *fvdat = VTOFUD(ap->a_vp); 2701 2702 printf("nodeid: %ju, parent nodeid: %ju, nlookup: %ju, flag: %#x\n", 2703 (uintmax_t)VTOILLU(ap->a_vp), (uintmax_t)fvdat->parent_nid, 2704 (uintmax_t)fvdat->nlookup, 2705 fvdat->flag); 2706 2707 return 0; 2708 } 2709 2710 /* 2711 * Get an NFS filehandle for a FUSE file. 2712 * 2713 * This will only work for FUSE file systems that guarantee the uniqueness of 2714 * nodeid:generation, which most don't. 2715 */ 2716 /* 2717 vop_vptofh { 2718 IN struct vnode *a_vp; 2719 IN struct fid *a_fhp; 2720 }; 2721 */ 2722 static int 2723 fuse_vnop_vptofh(struct vop_vptofh_args *ap) 2724 { 2725 struct vnode *vp = ap->a_vp; 2726 struct fuse_vnode_data *fvdat = VTOFUD(vp); 2727 struct fuse_fid *fhp = (struct fuse_fid *)(ap->a_fhp); 2728 _Static_assert(sizeof(struct fuse_fid) <= sizeof(struct fid), 2729 "FUSE fid type is too big"); 2730 struct mount *mp = vnode_mount(vp); 2731 struct fuse_data *data = fuse_get_mpdata(mp); 2732 struct vattr va; 2733 int err; 2734 2735 if (!(data->dataflags & FSESS_EXPORT_SUPPORT)) 2736 return EOPNOTSUPP; 2737 2738 err = fuse_internal_getattr(vp, &va, curthread->td_ucred, curthread); 2739 if (err) 2740 return err; 2741 2742 /*ip = VTOI(ap->a_vp);*/ 2743 /*ufhp = (struct ufid *)ap->a_fhp;*/ 2744 fhp->len = sizeof(struct fuse_fid); 2745 fhp->nid = fvdat->nid; 2746 if (fvdat->generation <= UINT32_MAX) 2747 fhp->gen = fvdat->generation; 2748 else 2749 return EOVERFLOW; 2750 return (0); 2751 } 2752