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sys/fs/nandfs/nandfs_vnops.c
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1 /*- 2 * Copyright (c) 2010-2012 Semihalf 3 * Copyright (c) 2008, 2009 Reinoud Zandijk 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * 26 * From: NetBSD: nilfs_vnops.c,v 1.2 2009/08/26 03:40:48 elad 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD: releng/10.4/sys/fs/nandfs/nandfs_vnops.c 276648 2015-01-04 00:46:06Z kib $"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/conf.h> 35 #include <sys/kernel.h> 36 #include <sys/lock.h> 37 #include <sys/lockf.h> 38 #include <sys/malloc.h> 39 #include <sys/mount.h> 40 #include <sys/mutex.h> 41 #include <sys/namei.h> 42 #include <sys/sysctl.h> 43 #include <sys/unistd.h> 44 #include <sys/vnode.h> 45 #include <sys/buf.h> 46 #include <sys/bio.h> 47 #include <sys/fcntl.h> 48 #include <sys/dirent.h> 49 #include <sys/rwlock.h> 50 #include <sys/stat.h> 51 #include <sys/priv.h> 52 53 #include <vm/vm.h> 54 #include <vm/vm_extern.h> 55 #include <vm/vm_object.h> 56 #include <vm/vnode_pager.h> 57 58 #include <machine/_inttypes.h> 59 60 #include <fs/nandfs/nandfs_mount.h> 61 #include <fs/nandfs/nandfs.h> 62 #include <fs/nandfs/nandfs_subr.h> 63 64 extern uma_zone_t nandfs_node_zone; 65 static void nandfs_read_filebuf(struct nandfs_node *, struct buf *); 66 static void nandfs_itimes_locked(struct vnode *); 67 static int nandfs_truncate(struct vnode *, uint64_t); 68 69 static vop_pathconf_t nandfs_pathconf; 70 71 #define UPDATE_CLOSE 0 72 #define UPDATE_WAIT 0 73 74 static int 75 nandfs_inactive(struct vop_inactive_args *ap) 76 { 77 struct vnode *vp = ap->a_vp; 78 struct nandfs_node *node = VTON(vp); 79 int error = 0; 80 81 DPRINTF(VNCALL, ("%s: vp:%p node:%p\n", __func__, vp, node)); 82 83 if (node == NULL) { 84 DPRINTF(NODE, ("%s: inactive NULL node\n", __func__)); 85 return (0); 86 } 87 88 if (node->nn_inode.i_mode != 0 && !(node->nn_inode.i_links_count)) { 89 nandfs_truncate(vp, 0); 90 error = nandfs_node_destroy(node); 91 if (error) 92 nandfs_error("%s: destroy node: %p\n", __func__, node); 93 node->nn_flags = 0; 94 vrecycle(vp); 95 } 96 97 return (error); 98 } 99 100 static int 101 nandfs_reclaim(struct vop_reclaim_args *ap) 102 { 103 struct vnode *vp = ap->a_vp; 104 struct nandfs_node *nandfs_node = VTON(vp); 105 struct nandfs_device *fsdev = nandfs_node->nn_nandfsdev; 106 uint64_t ino = nandfs_node->nn_ino; 107 108 DPRINTF(VNCALL, ("%s: vp:%p node:%p\n", __func__, vp, nandfs_node)); 109 110 /* Invalidate all entries to a particular vnode. */ 111 cache_purge(vp); 112 113 /* Destroy the vm object and flush associated pages. */ 114 vnode_destroy_vobject(vp); 115 116 /* Remove from vfs hash if not system vnode */ 117 if (!NANDFS_SYS_NODE(nandfs_node->nn_ino)) 118 vfs_hash_remove(vp); 119 120 /* Dispose all node knowledge */ 121 nandfs_dispose_node(&nandfs_node); 122 123 if (!NANDFS_SYS_NODE(ino)) 124 NANDFS_WRITEUNLOCK(fsdev); 125 126 return (0); 127 } 128 129 static int 130 nandfs_read(struct vop_read_args *ap) 131 { 132 register struct vnode *vp = ap->a_vp; 133 register struct nandfs_node *node = VTON(vp); 134 struct nandfs_device *nandfsdev = node->nn_nandfsdev; 135 struct uio *uio = ap->a_uio; 136 struct buf *bp; 137 uint64_t size; 138 uint32_t blocksize; 139 off_t bytesinfile; 140 ssize_t toread, off; 141 daddr_t lbn; 142 ssize_t resid; 143 int error = 0; 144 145 if (uio->uio_resid == 0) 146 return (0); 147 148 size = node->nn_inode.i_size; 149 if (uio->uio_offset >= size) 150 return (0); 151 152 blocksize = nandfsdev->nd_blocksize; 153 bytesinfile = size - uio->uio_offset; 154 155 resid = omin(uio->uio_resid, bytesinfile); 156 157 while (resid) { 158 lbn = uio->uio_offset / blocksize; 159 off = uio->uio_offset & (blocksize - 1); 160 161 toread = omin(resid, blocksize - off); 162 163 DPRINTF(READ, ("nandfs_read bn: 0x%jx toread: 0x%zx (0x%x)\n", 164 (uintmax_t)lbn, toread, blocksize)); 165 166 error = nandfs_bread(node, lbn, NOCRED, 0, &bp); 167 if (error) { 168 brelse(bp); 169 break; 170 } 171 172 error = uiomove(bp->b_data + off, toread, uio); 173 if (error) { 174 brelse(bp); 175 break; 176 } 177 178 brelse(bp); 179 resid -= toread; 180 } 181 182 return (error); 183 } 184 185 static int 186 nandfs_write(struct vop_write_args *ap) 187 { 188 struct nandfs_device *fsdev; 189 struct nandfs_node *node; 190 struct vnode *vp; 191 struct uio *uio; 192 struct buf *bp; 193 uint64_t file_size, vblk; 194 uint32_t blocksize; 195 ssize_t towrite, off; 196 daddr_t lbn; 197 ssize_t resid; 198 int error, ioflag, modified; 199 200 vp = ap->a_vp; 201 uio = ap->a_uio; 202 ioflag = ap->a_ioflag; 203 node = VTON(vp); 204 fsdev = node->nn_nandfsdev; 205 206 if (nandfs_fs_full(fsdev)) 207 return (ENOSPC); 208 209 DPRINTF(WRITE, ("nandfs_write called %#zx at %#jx\n", 210 uio->uio_resid, (uintmax_t)uio->uio_offset)); 211 212 if (uio->uio_offset < 0) 213 return (EINVAL); 214 if (uio->uio_resid == 0) 215 return (0); 216 217 blocksize = fsdev->nd_blocksize; 218 file_size = node->nn_inode.i_size; 219 220 switch (vp->v_type) { 221 case VREG: 222 if (ioflag & IO_APPEND) 223 uio->uio_offset = file_size; 224 break; 225 case VDIR: 226 return (EISDIR); 227 case VLNK: 228 break; 229 default: 230 panic("%s: bad file type vp: %p", __func__, vp); 231 } 232 233 /* If explicitly asked to append, uio_offset can be wrong? */ 234 if (ioflag & IO_APPEND) 235 uio->uio_offset = file_size; 236 237 resid = uio->uio_resid; 238 modified = error = 0; 239 240 while (uio->uio_resid) { 241 lbn = uio->uio_offset / blocksize; 242 off = uio->uio_offset & (blocksize - 1); 243 244 towrite = omin(uio->uio_resid, blocksize - off); 245 246 DPRINTF(WRITE, ("%s: lbn: 0x%jd toread: 0x%zx (0x%x)\n", 247 __func__, (uintmax_t)lbn, towrite, blocksize)); 248 249 error = nandfs_bmap_lookup(node, lbn, &vblk); 250 if (error) 251 break; 252 253 DPRINTF(WRITE, ("%s: lbn: 0x%jd toread: 0x%zx (0x%x) " 254 "vblk=%jx\n", __func__, (uintmax_t)lbn, towrite, blocksize, 255 vblk)); 256 257 if (vblk != 0) 258 error = nandfs_bread(node, lbn, NOCRED, 0, &bp); 259 else 260 error = nandfs_bcreate(node, lbn, NOCRED, 0, &bp); 261 262 DPRINTF(WRITE, ("%s: vp %p bread bp %p lbn %#jx\n", __func__, 263 vp, bp, (uintmax_t)lbn)); 264 if (error) { 265 if (bp) 266 brelse(bp); 267 break; 268 } 269 270 error = uiomove((char *)bp->b_data + off, (int)towrite, uio); 271 if (error) 272 break; 273 274 error = nandfs_dirty_buf(bp, 0); 275 if (error) 276 break; 277 278 modified++; 279 } 280 281 /* XXX proper handling when only part of file was properly written */ 282 if (modified) { 283 if (resid > uio->uio_resid && ap->a_cred && 284 ap->a_cred->cr_uid != 0) 285 node->nn_inode.i_mode &= ~(ISUID | ISGID); 286 287 if (file_size < uio->uio_offset + uio->uio_resid) { 288 node->nn_inode.i_size = uio->uio_offset + 289 uio->uio_resid; 290 node->nn_flags |= IN_CHANGE | IN_UPDATE; 291 vnode_pager_setsize(vp, uio->uio_offset + 292 uio->uio_resid); 293 nandfs_itimes(vp); 294 } 295 } 296 297 DPRINTF(WRITE, ("%s: return:%d\n", __func__, error)); 298 299 return (error); 300 } 301 302 static int 303 nandfs_lookup(struct vop_cachedlookup_args *ap) 304 { 305 struct vnode *dvp, **vpp; 306 struct componentname *cnp; 307 struct ucred *cred; 308 struct thread *td; 309 struct nandfs_node *dir_node, *node; 310 struct nandfsmount *nmp; 311 uint64_t ino, off; 312 const char *name; 313 int namelen, nameiop, islastcn, mounted_ro; 314 int error, found; 315 316 DPRINTF(VNCALL, ("%s\n", __func__)); 317 318 dvp = ap->a_dvp; 319 vpp = ap->a_vpp; 320 *vpp = NULL; 321 322 cnp = ap->a_cnp; 323 cred = cnp->cn_cred; 324 td = cnp->cn_thread; 325 326 dir_node = VTON(dvp); 327 nmp = dir_node->nn_nmp; 328 329 /* Simplify/clarification flags */ 330 nameiop = cnp->cn_nameiop; 331 islastcn = cnp->cn_flags & ISLASTCN; 332 mounted_ro = dvp->v_mount->mnt_flag & MNT_RDONLY; 333 334 /* 335 * If requesting a modify on the last path element on a read-only 336 * filingsystem, reject lookup; 337 */ 338 if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME)) 339 return (EROFS); 340 341 if (dir_node->nn_inode.i_links_count == 0) 342 return (ENOENT); 343 344 /* 345 * Obviously, the file is not (anymore) in the namecache, we have to 346 * search for it. There are three basic cases: '.', '..' and others. 347 * 348 * Following the guidelines of VOP_LOOKUP manpage and tmpfs. 349 */ 350 error = 0; 351 if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) { 352 DPRINTF(LOOKUP, ("\tlookup '.'\n")); 353 /* Special case 1 '.' */ 354 VREF(dvp); 355 *vpp = dvp; 356 /* Done */ 357 } else if (cnp->cn_flags & ISDOTDOT) { 358 /* Special case 2 '..' */ 359 DPRINTF(LOOKUP, ("\tlookup '..'\n")); 360 361 /* Get our node */ 362 name = ".."; 363 namelen = 2; 364 error = nandfs_lookup_name_in_dir(dvp, name, namelen, &ino, 365 &found, &off); 366 if (error) 367 goto out; 368 if (!found) 369 error = ENOENT; 370 371 /* First unlock parent */ 372 VOP_UNLOCK(dvp, 0); 373 374 if (error == 0) { 375 DPRINTF(LOOKUP, ("\tfound '..'\n")); 376 /* Try to create/reuse the node */ 377 error = nandfs_get_node(nmp, ino, &node); 378 379 if (!error) { 380 DPRINTF(LOOKUP, 381 ("\tnode retrieved/created OK\n")); 382 *vpp = NTOV(node); 383 } 384 } 385 386 /* Try to relock parent */ 387 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 388 } else { 389 DPRINTF(LOOKUP, ("\tlookup file\n")); 390 /* All other files */ 391 /* Look up filename in the directory returning its inode */ 392 name = cnp->cn_nameptr; 393 namelen = cnp->cn_namelen; 394 error = nandfs_lookup_name_in_dir(dvp, name, namelen, 395 &ino, &found, &off); 396 if (error) 397 goto out; 398 if (!found) { 399 DPRINTF(LOOKUP, ("\tNOT found\n")); 400 /* 401 * UGH, didn't find name. If we're creating or 402 * renaming on the last name this is OK and we ought 403 * to return EJUSTRETURN if its allowed to be created. 404 */ 405 error = ENOENT; 406 if ((nameiop == CREATE || nameiop == RENAME) && 407 islastcn) { 408 error = VOP_ACCESS(dvp, VWRITE, cred, 409 td); 410 if (!error) { 411 /* keep the component name */ 412 cnp->cn_flags |= SAVENAME; 413 error = EJUSTRETURN; 414 } 415 } 416 /* Done */ 417 } else { 418 if (ino == NANDFS_WHT_INO) 419 cnp->cn_flags |= ISWHITEOUT; 420 421 if ((cnp->cn_flags & ISWHITEOUT) && 422 (nameiop == LOOKUP)) 423 return (ENOENT); 424 425 if ((nameiop == DELETE) && islastcn) { 426 if ((cnp->cn_flags & ISWHITEOUT) && 427 (cnp->cn_flags & DOWHITEOUT)) { 428 cnp->cn_flags |= SAVENAME; 429 dir_node->nn_diroff = off; 430 return (EJUSTRETURN); 431 } 432 433 error = VOP_ACCESS(dvp, VWRITE, cred, 434 cnp->cn_thread); 435 if (error) 436 return (error); 437 438 /* Try to create/reuse the node */ 439 error = nandfs_get_node(nmp, ino, &node); 440 if (!error) { 441 *vpp = NTOV(node); 442 node->nn_diroff = off; 443 } 444 445 if ((dir_node->nn_inode.i_mode & ISVTX) && 446 cred->cr_uid != 0 && 447 cred->cr_uid != dir_node->nn_inode.i_uid && 448 node->nn_inode.i_uid != cred->cr_uid) { 449 vput(*vpp); 450 *vpp = NULL; 451 return (EPERM); 452 } 453 } else if ((nameiop == RENAME) && islastcn) { 454 error = VOP_ACCESS(dvp, VWRITE, cred, 455 cnp->cn_thread); 456 if (error) 457 return (error); 458 459 /* Try to create/reuse the node */ 460 error = nandfs_get_node(nmp, ino, &node); 461 if (!error) { 462 *vpp = NTOV(node); 463 node->nn_diroff = off; 464 } 465 } else { 466 /* Try to create/reuse the node */ 467 error = nandfs_get_node(nmp, ino, &node); 468 if (!error) { 469 *vpp = NTOV(node); 470 node->nn_diroff = off; 471 } 472 } 473 } 474 } 475 476 out: 477 /* 478 * Store result in the cache if requested. If we are creating a file, 479 * the file might not be found and thus putting it into the namecache 480 * might be seen as negative caching. 481 */ 482 if ((cnp->cn_flags & MAKEENTRY) != 0) 483 cache_enter(dvp, *vpp, cnp); 484 485 return (error); 486 487 } 488 489 static int 490 nandfs_getattr(struct vop_getattr_args *ap) 491 { 492 struct vnode *vp = ap->a_vp; 493 struct vattr *vap = ap->a_vap; 494 struct nandfs_node *node = VTON(vp); 495 struct nandfs_inode *inode = &node->nn_inode; 496 497 DPRINTF(VNCALL, ("%s: vp: %p\n", __func__, vp)); 498 nandfs_itimes(vp); 499 500 /* Basic info */ 501 VATTR_NULL(vap); 502 vap->va_atime.tv_sec = inode->i_mtime; 503 vap->va_atime.tv_nsec = inode->i_mtime_nsec; 504 vap->va_mtime.tv_sec = inode->i_mtime; 505 vap->va_mtime.tv_nsec = inode->i_mtime_nsec; 506 vap->va_ctime.tv_sec = inode->i_ctime; 507 vap->va_ctime.tv_nsec = inode->i_ctime_nsec; 508 vap->va_type = IFTOVT(inode->i_mode); 509 vap->va_mode = inode->i_mode & ~S_IFMT; 510 vap->va_nlink = inode->i_links_count; 511 vap->va_uid = inode->i_uid; 512 vap->va_gid = inode->i_gid; 513 vap->va_rdev = inode->i_special; 514 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 515 vap->va_fileid = node->nn_ino; 516 vap->va_size = inode->i_size; 517 vap->va_blocksize = node->nn_nandfsdev->nd_blocksize; 518 vap->va_gen = 0; 519 vap->va_flags = inode->i_flags; 520 vap->va_bytes = inode->i_blocks * vap->va_blocksize; 521 vap->va_filerev = 0; 522 vap->va_vaflags = 0; 523 524 return (0); 525 } 526 527 static int 528 nandfs_vtruncbuf(struct vnode *vp, uint64_t nblks) 529 { 530 struct nandfs_device *nffsdev; 531 struct bufobj *bo; 532 struct buf *bp, *nbp; 533 534 bo = &vp->v_bufobj; 535 nffsdev = VTON(vp)->nn_nandfsdev; 536 537 ASSERT_VOP_LOCKED(vp, "nandfs_truncate"); 538 restart: 539 BO_LOCK(bo); 540 restart_locked: 541 TAILQ_FOREACH_SAFE(bp, &bo->bo_clean.bv_hd, b_bobufs, nbp) { 542 if (bp->b_lblkno < nblks) 543 continue; 544 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) 545 goto restart_locked; 546 547 bremfree(bp); 548 bp->b_flags |= (B_INVAL | B_RELBUF); 549 bp->b_flags &= ~(B_ASYNC | B_MANAGED); 550 BO_UNLOCK(bo); 551 brelse(bp); 552 BO_LOCK(bo); 553 } 554 555 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) { 556 if (bp->b_lblkno < nblks) 557 continue; 558 if (BUF_LOCK(bp, 559 LK_EXCLUSIVE | LK_SLEEPFAIL | LK_INTERLOCK, 560 BO_LOCKPTR(bo)) == ENOLCK) 561 goto restart; 562 bp->b_flags |= (B_INVAL | B_RELBUF); 563 bp->b_flags &= ~(B_ASYNC | B_MANAGED); 564 brelse(bp); 565 nandfs_dirty_bufs_decrement(nffsdev); 566 BO_LOCK(bo); 567 } 568 569 BO_UNLOCK(bo); 570 571 return (0); 572 } 573 574 static int 575 nandfs_truncate(struct vnode *vp, uint64_t newsize) 576 { 577 struct nandfs_device *nffsdev; 578 struct nandfs_node *node; 579 struct nandfs_inode *inode; 580 struct buf *bp = NULL; 581 uint64_t oblks, nblks, vblk, size, rest; 582 int error; 583 584 node = VTON(vp); 585 nffsdev = node->nn_nandfsdev; 586 inode = &node->nn_inode; 587 588 /* Calculate end of file */ 589 size = inode->i_size; 590 591 if (newsize == size) { 592 node->nn_flags |= IN_CHANGE | IN_UPDATE; 593 nandfs_itimes(vp); 594 return (0); 595 } 596 597 if (newsize > size) { 598 inode->i_size = newsize; 599 vnode_pager_setsize(vp, newsize); 600 node->nn_flags |= IN_CHANGE | IN_UPDATE; 601 nandfs_itimes(vp); 602 return (0); 603 } 604 605 nblks = howmany(newsize, nffsdev->nd_blocksize); 606 oblks = howmany(size, nffsdev->nd_blocksize); 607 rest = newsize % nffsdev->nd_blocksize; 608 609 if (rest) { 610 error = nandfs_bmap_lookup(node, nblks - 1, &vblk); 611 if (error) 612 return (error); 613 614 if (vblk != 0) 615 error = nandfs_bread(node, nblks - 1, NOCRED, 0, &bp); 616 else 617 error = nandfs_bcreate(node, nblks - 1, NOCRED, 0, &bp); 618 619 if (error) { 620 if (bp) 621 brelse(bp); 622 return (error); 623 } 624 625 bzero((char *)bp->b_data + rest, 626 (u_int)(nffsdev->nd_blocksize - rest)); 627 error = nandfs_dirty_buf(bp, 0); 628 if (error) 629 return (error); 630 } 631 632 DPRINTF(VNCALL, ("%s: vp %p oblks %jx nblks %jx\n", __func__, vp, oblks, 633 nblks)); 634 635 error = nandfs_bmap_truncate_mapping(node, oblks - 1, nblks - 1); 636 if (error) { 637 if (bp) 638 nandfs_undirty_buf(bp); 639 return (error); 640 } 641 642 error = nandfs_vtruncbuf(vp, nblks); 643 if (error) { 644 if (bp) 645 nandfs_undirty_buf(bp); 646 return (error); 647 } 648 649 inode->i_size = newsize; 650 vnode_pager_setsize(vp, newsize); 651 node->nn_flags |= IN_CHANGE | IN_UPDATE; 652 nandfs_itimes(vp); 653 654 return (error); 655 } 656 657 static void 658 nandfs_itimes_locked(struct vnode *vp) 659 { 660 struct nandfs_node *node; 661 struct nandfs_inode *inode; 662 struct timespec ts; 663 664 ASSERT_VI_LOCKED(vp, __func__); 665 666 node = VTON(vp); 667 inode = &node->nn_inode; 668 669 if ((node->nn_flags & (IN_ACCESS | IN_CHANGE | IN_UPDATE)) == 0) 670 return; 671 672 if (((vp->v_mount->mnt_kern_flag & 673 (MNTK_SUSPENDED | MNTK_SUSPEND)) == 0) || 674 (node->nn_flags & (IN_CHANGE | IN_UPDATE))) 675 node->nn_flags |= IN_MODIFIED; 676 677 vfs_timestamp(&ts); 678 if (node->nn_flags & IN_UPDATE) { 679 inode->i_mtime = ts.tv_sec; 680 inode->i_mtime_nsec = ts.tv_nsec; 681 } 682 if (node->nn_flags & IN_CHANGE) { 683 inode->i_ctime = ts.tv_sec; 684 inode->i_ctime_nsec = ts.tv_nsec; 685 } 686 687 node->nn_flags &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE); 688 } 689 690 void 691 nandfs_itimes(struct vnode *vp) 692 { 693 694 VI_LOCK(vp); 695 nandfs_itimes_locked(vp); 696 VI_UNLOCK(vp); 697 } 698 699 static int 700 nandfs_chmod(struct vnode *vp, int mode, struct ucred *cred, struct thread *td) 701 { 702 struct nandfs_node *node = VTON(vp); 703 struct nandfs_inode *inode = &node->nn_inode; 704 uint16_t nmode; 705 int error = 0; 706 707 DPRINTF(VNCALL, ("%s: vp %p, mode %x, cred %p, td %p\n", __func__, vp, 708 mode, cred, td)); 709 /* 710 * To modify the permissions on a file, must possess VADMIN 711 * for that file. 712 */ 713 if ((error = VOP_ACCESS(vp, VADMIN, cred, td))) 714 return (error); 715 716 /* 717 * Privileged processes may set the sticky bit on non-directories, 718 * as well as set the setgid bit on a file with a group that the 719 * process is not a member of. Both of these are allowed in 720 * jail(8). 721 */ 722 if (vp->v_type != VDIR && (mode & S_ISTXT)) { 723 if (priv_check_cred(cred, PRIV_VFS_STICKYFILE, 0)) 724 return (EFTYPE); 725 } 726 if (!groupmember(inode->i_gid, cred) && (mode & ISGID)) { 727 error = priv_check_cred(cred, PRIV_VFS_SETGID, 0); 728 if (error) 729 return (error); 730 } 731 732 /* 733 * Deny setting setuid if we are not the file owner. 734 */ 735 if ((mode & ISUID) && inode->i_uid != cred->cr_uid) { 736 error = priv_check_cred(cred, PRIV_VFS_ADMIN, 0); 737 if (error) 738 return (error); 739 } 740 741 nmode = inode->i_mode; 742 nmode &= ~ALLPERMS; 743 nmode |= (mode & ALLPERMS); 744 inode->i_mode = nmode; 745 node->nn_flags |= IN_CHANGE; 746 747 DPRINTF(VNCALL, ("%s: to mode %x\n", __func__, nmode)); 748 749 return (error); 750 } 751 752 static int 753 nandfs_chown(struct vnode *vp, uid_t uid, gid_t gid, struct ucred *cred, 754 struct thread *td) 755 { 756 struct nandfs_node *node = VTON(vp); 757 struct nandfs_inode *inode = &node->nn_inode; 758 uid_t ouid; 759 gid_t ogid; 760 int error = 0; 761 762 if (uid == (uid_t)VNOVAL) 763 uid = inode->i_uid; 764 if (gid == (gid_t)VNOVAL) 765 gid = inode->i_gid; 766 /* 767 * To modify the ownership of a file, must possess VADMIN for that 768 * file. 769 */ 770 if ((error = VOP_ACCESSX(vp, VWRITE_OWNER, cred, td))) 771 return (error); 772 /* 773 * To change the owner of a file, or change the group of a file to a 774 * group of which we are not a member, the caller must have 775 * privilege. 776 */ 777 if (((uid != inode->i_uid && uid != cred->cr_uid) || 778 (gid != inode->i_gid && !groupmember(gid, cred))) && 779 (error = priv_check_cred(cred, PRIV_VFS_CHOWN, 0))) 780 return (error); 781 ogid = inode->i_gid; 782 ouid = inode->i_uid; 783 784 inode->i_gid = gid; 785 inode->i_uid = uid; 786 787 node->nn_flags |= IN_CHANGE; 788 if ((inode->i_mode & (ISUID | ISGID)) && 789 (ouid != uid || ogid != gid)) { 790 if (priv_check_cred(cred, PRIV_VFS_RETAINSUGID, 0)) { 791 inode->i_mode &= ~(ISUID | ISGID); 792 } 793 } 794 DPRINTF(VNCALL, ("%s: vp %p, cred %p, td %p - ret OK\n", __func__, vp, 795 cred, td)); 796 return (0); 797 } 798 799 static int 800 nandfs_setattr(struct vop_setattr_args *ap) 801 { 802 struct vnode *vp = ap->a_vp; 803 struct nandfs_node *node = VTON(vp); 804 struct nandfs_inode *inode = &node->nn_inode; 805 struct vattr *vap = ap->a_vap; 806 struct ucred *cred = ap->a_cred; 807 struct thread *td = curthread; 808 uint32_t flags; 809 int error = 0; 810 811 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 812 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 813 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 814 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 815 DPRINTF(VNCALL, ("%s: unsettable attribute\n", __func__)); 816 return (EINVAL); 817 } 818 819 if (vap->va_flags != VNOVAL) { 820 DPRINTF(VNCALL, ("%s: vp:%p td:%p flags:%lx\n", __func__, vp, 821 td, vap->va_flags)); 822 823 if (vp->v_mount->mnt_flag & MNT_RDONLY) 824 return (EROFS); 825 /* 826 * Callers may only modify the file flags on objects they 827 * have VADMIN rights for. 828 */ 829 if ((error = VOP_ACCESS(vp, VADMIN, cred, td))) 830 return (error); 831 /* 832 * Unprivileged processes are not permitted to unset system 833 * flags, or modify flags if any system flags are set. 834 * Privileged non-jail processes may not modify system flags 835 * if securelevel > 0 and any existing system flags are set. 836 * Privileged jail processes behave like privileged non-jail 837 * processes if the security.jail.chflags_allowed sysctl is 838 * is non-zero; otherwise, they behave like unprivileged 839 * processes. 840 */ 841 842 flags = inode->i_flags; 843 if (!priv_check_cred(cred, PRIV_VFS_SYSFLAGS, 0)) { 844 if (flags & (SF_NOUNLINK | SF_IMMUTABLE | SF_APPEND)) { 845 error = securelevel_gt(cred, 0); 846 if (error) 847 return (error); 848 } 849 /* Snapshot flag cannot be set or cleared */ 850 if (((vap->va_flags & SF_SNAPSHOT) != 0 && 851 (flags & SF_SNAPSHOT) == 0) || 852 ((vap->va_flags & SF_SNAPSHOT) == 0 && 853 (flags & SF_SNAPSHOT) != 0)) 854 return (EPERM); 855 856 inode->i_flags = vap->va_flags; 857 } else { 858 if (flags & (SF_NOUNLINK | SF_IMMUTABLE | SF_APPEND) || 859 (vap->va_flags & UF_SETTABLE) != vap->va_flags) 860 return (EPERM); 861 862 flags &= SF_SETTABLE; 863 flags |= (vap->va_flags & UF_SETTABLE); 864 inode->i_flags = flags; 865 } 866 node->nn_flags |= IN_CHANGE; 867 if (vap->va_flags & (IMMUTABLE | APPEND)) 868 return (0); 869 } 870 if (inode->i_flags & (IMMUTABLE | APPEND)) 871 return (EPERM); 872 873 if (vap->va_size != (u_quad_t)VNOVAL) { 874 DPRINTF(VNCALL, ("%s: vp:%p td:%p size:%jx\n", __func__, vp, td, 875 (uintmax_t)vap->va_size)); 876 877 switch (vp->v_type) { 878 case VDIR: 879 return (EISDIR); 880 case VLNK: 881 case VREG: 882 if (vp->v_mount->mnt_flag & MNT_RDONLY) 883 return (EROFS); 884 if ((inode->i_flags & SF_SNAPSHOT) != 0) 885 return (EPERM); 886 break; 887 default: 888 return (0); 889 } 890 891 if (vap->va_size > node->nn_nandfsdev->nd_maxfilesize) 892 return (EFBIG); 893 894 KASSERT((vp->v_type == VREG), ("Set size %d", vp->v_type)); 895 nandfs_truncate(vp, vap->va_size); 896 node->nn_flags |= IN_CHANGE; 897 898 return (0); 899 } 900 901 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 902 if (vp->v_mount->mnt_flag & MNT_RDONLY) 903 return (EROFS); 904 DPRINTF(VNCALL, ("%s: vp:%p td:%p uid/gid %x/%x\n", __func__, 905 vp, td, vap->va_uid, vap->va_gid)); 906 error = nandfs_chown(vp, vap->va_uid, vap->va_gid, cred, td); 907 if (error) 908 return (error); 909 } 910 911 if (vap->va_mode != (mode_t)VNOVAL) { 912 if (vp->v_mount->mnt_flag & MNT_RDONLY) 913 return (EROFS); 914 DPRINTF(VNCALL, ("%s: vp:%p td:%p mode %x\n", __func__, vp, td, 915 vap->va_mode)); 916 917 error = nandfs_chmod(vp, (int)vap->va_mode, cred, td); 918 if (error) 919 return (error); 920 } 921 if (vap->va_atime.tv_sec != VNOVAL || 922 vap->va_mtime.tv_sec != VNOVAL || 923 vap->va_birthtime.tv_sec != VNOVAL) { 924 DPRINTF(VNCALL, ("%s: vp:%p td:%p time a/m/b %jx/%jx/%jx\n", 925 __func__, vp, td, (uintmax_t)vap->va_atime.tv_sec, 926 (uintmax_t)vap->va_mtime.tv_sec, 927 (uintmax_t)vap->va_birthtime.tv_sec)); 928 929 if (vap->va_atime.tv_sec != VNOVAL) 930 node->nn_flags |= IN_ACCESS; 931 if (vap->va_mtime.tv_sec != VNOVAL) 932 node->nn_flags |= IN_CHANGE | IN_UPDATE; 933 if (vap->va_birthtime.tv_sec != VNOVAL) 934 node->nn_flags |= IN_MODIFIED; 935 nandfs_itimes(vp); 936 return (0); 937 } 938 939 return (0); 940 } 941 942 static int 943 nandfs_open(struct vop_open_args *ap) 944 { 945 struct nandfs_node *node = VTON(ap->a_vp); 946 uint64_t filesize; 947 948 DPRINTF(VNCALL, ("nandfs_open called ap->a_mode %x\n", ap->a_mode)); 949 950 if (ap->a_vp->v_type == VCHR || ap->a_vp->v_type == VBLK) 951 return (EOPNOTSUPP); 952 953 if ((node->nn_inode.i_flags & APPEND) && 954 (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 955 return (EPERM); 956 957 filesize = node->nn_inode.i_size; 958 vnode_create_vobject(ap->a_vp, filesize, ap->a_td); 959 960 return (0); 961 } 962 963 static int 964 nandfs_close(struct vop_close_args *ap) 965 { 966 struct vnode *vp = ap->a_vp; 967 struct nandfs_node *node = VTON(vp); 968 969 DPRINTF(VNCALL, ("%s: vp %p node %p\n", __func__, vp, node)); 970 971 mtx_lock(&vp->v_interlock); 972 if (vp->v_usecount > 1) 973 nandfs_itimes_locked(vp); 974 mtx_unlock(&vp->v_interlock); 975 976 return (0); 977 } 978 979 static int 980 nandfs_check_possible(struct vnode *vp, struct vattr *vap, mode_t mode) 981 { 982 983 /* Check if we are allowed to write */ 984 switch (vap->va_type) { 985 case VDIR: 986 case VLNK: 987 case VREG: 988 /* 989 * Normal nodes: check if we're on a read-only mounted 990 * filingsystem and bomb out if we're trying to write. 991 */ 992 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 993 return (EROFS); 994 break; 995 case VBLK: 996 case VCHR: 997 case VSOCK: 998 case VFIFO: 999 /* 1000 * Special nodes: even on read-only mounted filingsystems 1001 * these are allowed to be written to if permissions allow. 1002 */ 1003 break; 1004 default: 1005 /* No idea what this is */ 1006 return (EINVAL); 1007 } 1008 1009 /* Noone may write immutable files */ 1010 if ((mode & VWRITE) && (VTON(vp)->nn_inode.i_flags & IMMUTABLE)) 1011 return (EPERM); 1012 1013 return (0); 1014 } 1015 1016 static int 1017 nandfs_check_permitted(struct vnode *vp, struct vattr *vap, mode_t mode, 1018 struct ucred *cred) 1019 { 1020 1021 return (vaccess(vp->v_type, vap->va_mode, vap->va_uid, vap->va_gid, mode, 1022 cred, NULL)); 1023 } 1024 1025 static int 1026 nandfs_advlock(struct vop_advlock_args *ap) 1027 { 1028 struct nandfs_node *nvp; 1029 quad_t size; 1030 1031 nvp = VTON(ap->a_vp); 1032 size = nvp->nn_inode.i_size; 1033 return (lf_advlock(ap, &(nvp->nn_lockf), size)); 1034 } 1035 1036 static int 1037 nandfs_access(struct vop_access_args *ap) 1038 { 1039 struct vnode *vp = ap->a_vp; 1040 accmode_t accmode = ap->a_accmode; 1041 struct ucred *cred = ap->a_cred; 1042 struct vattr vap; 1043 int error; 1044 1045 DPRINTF(VNCALL, ("%s: vp:%p mode: %x\n", __func__, vp, accmode)); 1046 1047 error = VOP_GETATTR(vp, &vap, NULL); 1048 if (error) 1049 return (error); 1050 1051 error = nandfs_check_possible(vp, &vap, accmode); 1052 if (error) { 1053 return (error); 1054 } 1055 1056 error = nandfs_check_permitted(vp, &vap, accmode, cred); 1057 1058 return (error); 1059 } 1060 1061 static int 1062 nandfs_print(struct vop_print_args *ap) 1063 { 1064 struct vnode *vp = ap->a_vp; 1065 struct nandfs_node *nvp = VTON(vp); 1066 1067 printf("\tvp=%p, nandfs_node=%p\n", vp, nvp); 1068 printf("nandfs inode %#jx\n", (uintmax_t)nvp->nn_ino); 1069 printf("flags = 0x%b\n", (u_int)nvp->nn_flags, PRINT_NODE_FLAGS); 1070 1071 return (0); 1072 } 1073 1074 static void 1075 nandfs_read_filebuf(struct nandfs_node *node, struct buf *bp) 1076 { 1077 struct nandfs_device *nandfsdev = node->nn_nandfsdev; 1078 struct buf *nbp; 1079 nandfs_daddr_t vblk, pblk; 1080 nandfs_lbn_t from; 1081 uint32_t blocksize; 1082 int error = 0; 1083 int blk2dev = nandfsdev->nd_blocksize / DEV_BSIZE; 1084 1085 /* 1086 * Translate all the block sectors into a series of buffers to read 1087 * asynchronously from the nandfs device. Note that this lookup may 1088 * induce readin's too. 1089 */ 1090 1091 blocksize = nandfsdev->nd_blocksize; 1092 if (bp->b_bcount / blocksize != 1) 1093 panic("invalid b_count in bp %p\n", bp); 1094 1095 from = bp->b_blkno; 1096 1097 DPRINTF(READ, ("\tread in from inode %#jx blkno %#jx" 1098 " count %#lx\n", (uintmax_t)node->nn_ino, from, 1099 bp->b_bcount)); 1100 1101 /* Get virtual block numbers for the vnode's buffer span */ 1102 error = nandfs_bmap_lookup(node, from, &vblk); 1103 if (error) { 1104 bp->b_error = EINVAL; 1105 bp->b_ioflags |= BIO_ERROR; 1106 bufdone(bp); 1107 return; 1108 } 1109 1110 /* Translate virtual block numbers to physical block numbers */ 1111 error = nandfs_vtop(node, vblk, &pblk); 1112 if (error) { 1113 bp->b_error = EINVAL; 1114 bp->b_ioflags |= BIO_ERROR; 1115 bufdone(bp); 1116 return; 1117 } 1118 1119 /* Issue translated blocks */ 1120 bp->b_resid = bp->b_bcount; 1121 1122 /* Note virtual block 0 marks not mapped */ 1123 if (vblk == 0) { 1124 vfs_bio_clrbuf(bp); 1125 bufdone(bp); 1126 return; 1127 } 1128 1129 nbp = bp; 1130 nbp->b_blkno = pblk * blk2dev; 1131 bp->b_iooffset = dbtob(nbp->b_blkno); 1132 MPASS(bp->b_iooffset >= 0); 1133 BO_STRATEGY(&nandfsdev->nd_devvp->v_bufobj, nbp); 1134 nandfs_vblk_set(bp, vblk); 1135 DPRINTF(READ, ("read_filebuf : ino %#jx blk %#jx -> " 1136 "%#jx -> %#jx [bp %p]\n", (uintmax_t)node->nn_ino, 1137 (uintmax_t)(from), (uintmax_t)vblk, 1138 (uintmax_t)pblk, nbp)); 1139 } 1140 1141 static void 1142 nandfs_write_filebuf(struct nandfs_node *node, struct buf *bp) 1143 { 1144 struct nandfs_device *nandfsdev = node->nn_nandfsdev; 1145 1146 bp->b_iooffset = dbtob(bp->b_blkno); 1147 MPASS(bp->b_iooffset >= 0); 1148 BO_STRATEGY(&nandfsdev->nd_devvp->v_bufobj, bp); 1149 } 1150 1151 static int 1152 nandfs_strategy(struct vop_strategy_args *ap) 1153 { 1154 struct vnode *vp = ap->a_vp; 1155 struct buf *bp = ap->a_bp; 1156 struct nandfs_node *node = VTON(vp); 1157 1158 1159 /* check if we ought to be here */ 1160 KASSERT((vp->v_type != VBLK && vp->v_type != VCHR), 1161 ("nandfs_strategy on type %d", vp->v_type)); 1162 1163 /* Translate if needed and pass on */ 1164 if (bp->b_iocmd == BIO_READ) { 1165 nandfs_read_filebuf(node, bp); 1166 return (0); 1167 } 1168 1169 /* Send to segment collector */ 1170 nandfs_write_filebuf(node, bp); 1171 return (0); 1172 } 1173 1174 static int 1175 nandfs_readdir(struct vop_readdir_args *ap) 1176 { 1177 struct uio *uio = ap->a_uio; 1178 struct vnode *vp = ap->a_vp; 1179 struct nandfs_node *node = VTON(vp); 1180 struct nandfs_dir_entry *ndirent; 1181 struct dirent dirent; 1182 struct buf *bp; 1183 uint64_t file_size, diroffset, transoffset, blkoff; 1184 uint64_t blocknr; 1185 uint32_t blocksize = node->nn_nandfsdev->nd_blocksize; 1186 uint8_t *pos, name_len; 1187 int error; 1188 1189 DPRINTF(READDIR, ("nandfs_readdir called\n")); 1190 1191 if (vp->v_type != VDIR) 1192 return (ENOTDIR); 1193 1194 file_size = node->nn_inode.i_size; 1195 DPRINTF(READDIR, ("nandfs_readdir filesize %jd resid %zd\n", 1196 (uintmax_t)file_size, uio->uio_resid )); 1197 1198 /* We are called just as long as we keep on pushing data in */ 1199 error = 0; 1200 if ((uio->uio_offset < file_size) && 1201 (uio->uio_resid >= sizeof(struct dirent))) { 1202 diroffset = uio->uio_offset; 1203 transoffset = diroffset; 1204 1205 blocknr = diroffset / blocksize; 1206 blkoff = diroffset % blocksize; 1207 error = nandfs_bread(node, blocknr, NOCRED, 0, &bp); 1208 if (error) { 1209 brelse(bp); 1210 return (EIO); 1211 } 1212 while (diroffset < file_size) { 1213 DPRINTF(READDIR, ("readdir : offset = %"PRIu64"\n", 1214 diroffset)); 1215 if (blkoff >= blocksize) { 1216 blkoff = 0; blocknr++; 1217 brelse(bp); 1218 error = nandfs_bread(node, blocknr, NOCRED, 0, 1219 &bp); 1220 if (error) { 1221 brelse(bp); 1222 return (EIO); 1223 } 1224 } 1225 1226 /* Read in one dirent */ 1227 pos = (uint8_t *)bp->b_data + blkoff; 1228 ndirent = (struct nandfs_dir_entry *)pos; 1229 1230 name_len = ndirent->name_len; 1231 memset(&dirent, 0, sizeof(struct dirent)); 1232 dirent.d_fileno = ndirent->inode; 1233 if (dirent.d_fileno) { 1234 dirent.d_type = ndirent->file_type; 1235 dirent.d_namlen = name_len; 1236 strncpy(dirent.d_name, ndirent->name, name_len); 1237 dirent.d_reclen = GENERIC_DIRSIZ(&dirent); 1238 DPRINTF(READDIR, ("copying `%*.*s`\n", name_len, 1239 name_len, dirent.d_name)); 1240 } 1241 1242 /* 1243 * If there isn't enough space in the uio to return a 1244 * whole dirent, break off read 1245 */ 1246 if (uio->uio_resid < GENERIC_DIRSIZ(&dirent)) 1247 break; 1248 1249 /* Transfer */ 1250 if (dirent.d_fileno) 1251 uiomove(&dirent, GENERIC_DIRSIZ(&dirent), uio); 1252 1253 /* Advance */ 1254 diroffset += ndirent->rec_len; 1255 blkoff += ndirent->rec_len; 1256 1257 /* Remember the last entry we transfered */ 1258 transoffset = diroffset; 1259 } 1260 brelse(bp); 1261 1262 /* Pass on last transfered offset */ 1263 uio->uio_offset = transoffset; 1264 } 1265 1266 if (ap->a_eofflag) 1267 *ap->a_eofflag = (uio->uio_offset >= file_size); 1268 1269 return (error); 1270 } 1271 1272 static int 1273 nandfs_dirempty(struct vnode *dvp, uint64_t parentino, struct ucred *cred) 1274 { 1275 struct nandfs_node *dnode = VTON(dvp); 1276 struct nandfs_dir_entry *dirent; 1277 uint64_t file_size = dnode->nn_inode.i_size; 1278 uint64_t blockcount = dnode->nn_inode.i_blocks; 1279 uint64_t blocknr; 1280 uint32_t blocksize = dnode->nn_nandfsdev->nd_blocksize; 1281 uint32_t limit; 1282 uint32_t off; 1283 uint8_t *pos; 1284 struct buf *bp; 1285 int error; 1286 1287 DPRINTF(LOOKUP, ("%s: dvp %p parentino %#jx cred %p\n", __func__, dvp, 1288 (uintmax_t)parentino, cred)); 1289 1290 KASSERT((file_size != 0), ("nandfs_dirempty for NULL dir %p", dvp)); 1291 1292 blocknr = 0; 1293 while (blocknr < blockcount) { 1294 error = nandfs_bread(dnode, blocknr, NOCRED, 0, &bp); 1295 if (error) { 1296 brelse(bp); 1297 return (0); 1298 } 1299 1300 pos = (uint8_t *)bp->b_data; 1301 off = 0; 1302 1303 if (blocknr == (blockcount - 1)) 1304 limit = file_size % blocksize; 1305 else 1306 limit = blocksize; 1307 1308 while (off < limit) { 1309 dirent = (struct nandfs_dir_entry *)(pos + off); 1310 off += dirent->rec_len; 1311 1312 if (dirent->inode == 0) 1313 continue; 1314 1315 switch (dirent->name_len) { 1316 case 0: 1317 break; 1318 case 1: 1319 if (dirent->name[0] != '.') 1320 goto notempty; 1321 1322 KASSERT(dirent->inode == dnode->nn_ino, 1323 (".'s inode does not match dir")); 1324 break; 1325 case 2: 1326 if (dirent->name[0] != '.' && 1327 dirent->name[1] != '.') 1328 goto notempty; 1329 1330 KASSERT(dirent->inode == parentino, 1331 ("..'s inode does not match parent")); 1332 break; 1333 default: 1334 goto notempty; 1335 } 1336 } 1337 1338 brelse(bp); 1339 blocknr++; 1340 } 1341 1342 return (1); 1343 notempty: 1344 brelse(bp); 1345 return (0); 1346 } 1347 1348 static int 1349 nandfs_link(struct vop_link_args *ap) 1350 { 1351 struct vnode *tdvp = ap->a_tdvp; 1352 struct vnode *vp = ap->a_vp; 1353 struct componentname *cnp = ap->a_cnp; 1354 struct nandfs_node *node = VTON(vp); 1355 struct nandfs_inode *inode = &node->nn_inode; 1356 int error; 1357 1358 if (inode->i_links_count >= LINK_MAX) 1359 return (EMLINK); 1360 1361 if (inode->i_flags & (IMMUTABLE | APPEND)) 1362 return (EPERM); 1363 1364 /* Update link count */ 1365 inode->i_links_count++; 1366 1367 /* Add dir entry */ 1368 error = nandfs_add_dirent(tdvp, node->nn_ino, cnp->cn_nameptr, 1369 cnp->cn_namelen, IFTODT(inode->i_mode)); 1370 if (error) { 1371 inode->i_links_count--; 1372 } 1373 1374 node->nn_flags |= IN_CHANGE; 1375 nandfs_itimes(vp); 1376 DPRINTF(VNCALL, ("%s: tdvp %p vp %p cnp %p\n", 1377 __func__, tdvp, vp, cnp)); 1378 1379 return (0); 1380 } 1381 1382 static int 1383 nandfs_create(struct vop_create_args *ap) 1384 { 1385 struct vnode *dvp = ap->a_dvp; 1386 struct vnode **vpp = ap->a_vpp; 1387 struct componentname *cnp = ap->a_cnp; 1388 uint16_t mode = MAKEIMODE(ap->a_vap->va_type, ap->a_vap->va_mode); 1389 struct nandfs_node *dir_node = VTON(dvp); 1390 struct nandfsmount *nmp = dir_node->nn_nmp; 1391 struct nandfs_node *node; 1392 int error; 1393 1394 DPRINTF(VNCALL, ("%s: dvp %p\n", __func__, dvp)); 1395 1396 if (nandfs_fs_full(dir_node->nn_nandfsdev)) 1397 return (ENOSPC); 1398 1399 /* Create new vnode/inode */ 1400 error = nandfs_node_create(nmp, &node, mode); 1401 if (error) 1402 return (error); 1403 node->nn_inode.i_gid = dir_node->nn_inode.i_gid; 1404 node->nn_inode.i_uid = cnp->cn_cred->cr_uid; 1405 1406 /* Add new dir entry */ 1407 error = nandfs_add_dirent(dvp, node->nn_ino, cnp->cn_nameptr, 1408 cnp->cn_namelen, IFTODT(mode)); 1409 if (error) { 1410 if (nandfs_node_destroy(node)) { 1411 nandfs_error("%s: error destroying node %p\n", 1412 __func__, node); 1413 } 1414 return (error); 1415 } 1416 *vpp = NTOV(node); 1417 if ((cnp->cn_flags & MAKEENTRY) != 0) 1418 cache_enter(dvp, *vpp, cnp); 1419 1420 DPRINTF(VNCALL, ("created file vp %p nandnode %p ino %jx\n", *vpp, node, 1421 (uintmax_t)node->nn_ino)); 1422 return (0); 1423 } 1424 1425 static int 1426 nandfs_remove(struct vop_remove_args *ap) 1427 { 1428 struct vnode *vp = ap->a_vp; 1429 struct vnode *dvp = ap->a_dvp; 1430 struct nandfs_node *node = VTON(vp); 1431 struct nandfs_node *dnode = VTON(dvp); 1432 struct componentname *cnp = ap->a_cnp; 1433 1434 DPRINTF(VNCALL, ("%s: dvp %p vp %p nandnode %p ino %#jx link %d\n", 1435 __func__, dvp, vp, node, (uintmax_t)node->nn_ino, 1436 node->nn_inode.i_links_count)); 1437 1438 if (vp->v_type == VDIR) 1439 return (EISDIR); 1440 1441 /* Files marked as immutable or append-only cannot be deleted. */ 1442 if ((node->nn_inode.i_flags & (IMMUTABLE | APPEND | NOUNLINK)) || 1443 (dnode->nn_inode.i_flags & APPEND)) 1444 return (EPERM); 1445 1446 nandfs_remove_dirent(dvp, node, cnp); 1447 node->nn_inode.i_links_count--; 1448 node->nn_flags |= IN_CHANGE; 1449 1450 return (0); 1451 } 1452 1453 /* 1454 * Check if source directory is in the path of the target directory. 1455 * Target is supplied locked, source is unlocked. 1456 * The target is always vput before returning. 1457 */ 1458 static int 1459 nandfs_checkpath(struct nandfs_node *src, struct nandfs_node *dest, 1460 struct ucred *cred) 1461 { 1462 struct vnode *vp; 1463 int error, rootino; 1464 struct nandfs_dir_entry dirent; 1465 1466 vp = NTOV(dest); 1467 if (src->nn_ino == dest->nn_ino) { 1468 error = EEXIST; 1469 goto out; 1470 } 1471 rootino = NANDFS_ROOT_INO; 1472 error = 0; 1473 if (dest->nn_ino == rootino) 1474 goto out; 1475 1476 for (;;) { 1477 if (vp->v_type != VDIR) { 1478 error = ENOTDIR; 1479 break; 1480 } 1481 1482 error = vn_rdwr(UIO_READ, vp, (caddr_t)&dirent, 1483 NANDFS_DIR_REC_LEN(2), (off_t)0, UIO_SYSSPACE, 1484 IO_NODELOCKED | IO_NOMACCHECK, cred, NOCRED, 1485 NULL, NULL); 1486 if (error != 0) 1487 break; 1488 if (dirent.name_len != 2 || 1489 dirent.name[0] != '.' || 1490 dirent.name[1] != '.') { 1491 error = ENOTDIR; 1492 break; 1493 } 1494 if (dirent.inode == src->nn_ino) { 1495 error = EINVAL; 1496 break; 1497 } 1498 if (dirent.inode == rootino) 1499 break; 1500 vput(vp); 1501 if ((error = VFS_VGET(vp->v_mount, dirent.inode, 1502 LK_EXCLUSIVE, &vp)) != 0) { 1503 vp = NULL; 1504 break; 1505 } 1506 } 1507 1508 out: 1509 if (error == ENOTDIR) 1510 printf("checkpath: .. not a directory\n"); 1511 if (vp != NULL) 1512 vput(vp); 1513 return (error); 1514 } 1515 1516 static int 1517 nandfs_rename(struct vop_rename_args *ap) 1518 { 1519 struct vnode *tvp = ap->a_tvp; 1520 struct vnode *tdvp = ap->a_tdvp; 1521 struct vnode *fvp = ap->a_fvp; 1522 struct vnode *fdvp = ap->a_fdvp; 1523 struct componentname *tcnp = ap->a_tcnp; 1524 struct componentname *fcnp = ap->a_fcnp; 1525 int doingdirectory = 0, oldparent = 0, newparent = 0; 1526 int error = 0; 1527 1528 struct nandfs_node *fdnode, *fnode, *fnode1; 1529 struct nandfs_node *tdnode = VTON(tdvp); 1530 struct nandfs_node *tnode; 1531 1532 uint32_t tdflags, fflags, fdflags; 1533 uint16_t mode; 1534 1535 DPRINTF(VNCALL, ("%s: fdvp:%p fvp:%p tdvp:%p tdp:%p\n", __func__, fdvp, 1536 fvp, tdvp, tvp)); 1537 1538 /* 1539 * Check for cross-device rename. 1540 */ 1541 if ((fvp->v_mount != tdvp->v_mount) || 1542 (tvp && (fvp->v_mount != tvp->v_mount))) { 1543 error = EXDEV; 1544 abortit: 1545 if (tdvp == tvp) 1546 vrele(tdvp); 1547 else 1548 vput(tdvp); 1549 if (tvp) 1550 vput(tvp); 1551 vrele(fdvp); 1552 vrele(fvp); 1553 return (error); 1554 } 1555 1556 tdflags = tdnode->nn_inode.i_flags; 1557 if (tvp && 1558 ((VTON(tvp)->nn_inode.i_flags & (NOUNLINK | IMMUTABLE | APPEND)) || 1559 (tdflags & APPEND))) { 1560 error = EPERM; 1561 goto abortit; 1562 } 1563 1564 /* 1565 * Renaming a file to itself has no effect. The upper layers should 1566 * not call us in that case. Temporarily just warn if they do. 1567 */ 1568 if (fvp == tvp) { 1569 printf("nandfs_rename: fvp == tvp (can't happen)\n"); 1570 error = 0; 1571 goto abortit; 1572 } 1573 1574 if ((error = vn_lock(fvp, LK_EXCLUSIVE)) != 0) 1575 goto abortit; 1576 1577 fdnode = VTON(fdvp); 1578 fnode = VTON(fvp); 1579 1580 if (fnode->nn_inode.i_links_count >= LINK_MAX) { 1581 VOP_UNLOCK(fvp, 0); 1582 error = EMLINK; 1583 goto abortit; 1584 } 1585 1586 fflags = fnode->nn_inode.i_flags; 1587 fdflags = fdnode->nn_inode.i_flags; 1588 1589 if ((fflags & (NOUNLINK | IMMUTABLE | APPEND)) || 1590 (fdflags & APPEND)) { 1591 VOP_UNLOCK(fvp, 0); 1592 error = EPERM; 1593 goto abortit; 1594 } 1595 1596 mode = fnode->nn_inode.i_mode; 1597 if ((mode & S_IFMT) == S_IFDIR) { 1598 /* 1599 * Avoid ".", "..", and aliases of "." for obvious reasons. 1600 */ 1601 1602 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 1603 (fdvp == fvp) || 1604 ((fcnp->cn_flags | tcnp->cn_flags) & ISDOTDOT) || 1605 (fnode->nn_flags & IN_RENAME)) { 1606 VOP_UNLOCK(fvp, 0); 1607 error = EINVAL; 1608 goto abortit; 1609 } 1610 fnode->nn_flags |= IN_RENAME; 1611 doingdirectory = 1; 1612 DPRINTF(VNCALL, ("%s: doingdirectory dvp %p\n", __func__, 1613 tdvp)); 1614 oldparent = fdnode->nn_ino; 1615 } 1616 1617 vrele(fdvp); 1618 1619 tnode = NULL; 1620 if (tvp) 1621 tnode = VTON(tvp); 1622 1623 /* 1624 * Bump link count on fvp while we are moving stuff around. If we 1625 * crash before completing the work, the link count may be wrong 1626 * but correctable. 1627 */ 1628 fnode->nn_inode.i_links_count++; 1629 1630 /* Check for in path moving XXX */ 1631 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_thread); 1632 VOP_UNLOCK(fvp, 0); 1633 if (oldparent != tdnode->nn_ino) 1634 newparent = tdnode->nn_ino; 1635 if (doingdirectory && newparent) { 1636 if (error) /* write access check above */ 1637 goto bad; 1638 if (tnode != NULL) 1639 vput(tvp); 1640 1641 error = nandfs_checkpath(fnode, tdnode, tcnp->cn_cred); 1642 if (error) 1643 goto out; 1644 1645 VREF(tdvp); 1646 error = relookup(tdvp, &tvp, tcnp); 1647 if (error) 1648 goto out; 1649 vrele(tdvp); 1650 tdnode = VTON(tdvp); 1651 tnode = NULL; 1652 if (tvp) 1653 tnode = VTON(tvp); 1654 } 1655 1656 /* 1657 * If the target doesn't exist, link the target to the source and 1658 * unlink the source. Otherwise, rewrite the target directory to 1659 * reference the source and remove the original entry. 1660 */ 1661 1662 if (tvp == NULL) { 1663 /* 1664 * Account for ".." in new directory. 1665 */ 1666 if (doingdirectory && fdvp != tdvp) 1667 tdnode->nn_inode.i_links_count++; 1668 1669 DPRINTF(VNCALL, ("%s: new entry in dvp:%p\n", __func__, tdvp)); 1670 /* 1671 * Add name in new directory. 1672 */ 1673 error = nandfs_add_dirent(tdvp, fnode->nn_ino, tcnp->cn_nameptr, 1674 tcnp->cn_namelen, IFTODT(fnode->nn_inode.i_mode)); 1675 if (error) { 1676 if (doingdirectory && fdvp != tdvp) 1677 tdnode->nn_inode.i_links_count--; 1678 goto bad; 1679 } 1680 1681 vput(tdvp); 1682 } else { 1683 /* 1684 * If the parent directory is "sticky", then the user must 1685 * own the parent directory, or the destination of the rename, 1686 * otherwise the destination may not be changed (except by 1687 * root). This implements append-only directories. 1688 */ 1689 if ((tdnode->nn_inode.i_mode & S_ISTXT) && 1690 tcnp->cn_cred->cr_uid != 0 && 1691 tcnp->cn_cred->cr_uid != tdnode->nn_inode.i_uid && 1692 tnode->nn_inode.i_uid != tcnp->cn_cred->cr_uid) { 1693 error = EPERM; 1694 goto bad; 1695 } 1696 /* 1697 * Target must be empty if a directory and have no links 1698 * to it. Also, ensure source and target are compatible 1699 * (both directories, or both not directories). 1700 */ 1701 mode = tnode->nn_inode.i_mode; 1702 if ((mode & S_IFMT) == S_IFDIR) { 1703 if (!nandfs_dirempty(tvp, tdnode->nn_ino, 1704 tcnp->cn_cred)) { 1705 error = ENOTEMPTY; 1706 goto bad; 1707 } 1708 if (!doingdirectory) { 1709 error = ENOTDIR; 1710 goto bad; 1711 } 1712 /* 1713 * Update name cache since directory is going away. 1714 */ 1715 cache_purge(tdvp); 1716 } else if (doingdirectory) { 1717 error = EISDIR; 1718 goto bad; 1719 } 1720 1721 DPRINTF(VNCALL, ("%s: update entry dvp:%p\n", __func__, tdvp)); 1722 /* 1723 * Change name tcnp in tdvp to point at fvp. 1724 */ 1725 error = nandfs_update_dirent(tdvp, fnode, tnode); 1726 if (error) 1727 goto bad; 1728 1729 if (doingdirectory && !newparent) 1730 tdnode->nn_inode.i_links_count--; 1731 1732 vput(tdvp); 1733 1734 tnode->nn_inode.i_links_count--; 1735 vput(tvp); 1736 tnode = NULL; 1737 } 1738 1739 /* 1740 * Unlink the source. 1741 */ 1742 fcnp->cn_flags &= ~MODMASK; 1743 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 1744 VREF(fdvp); 1745 error = relookup(fdvp, &fvp, fcnp); 1746 if (error == 0) 1747 vrele(fdvp); 1748 if (fvp != NULL) { 1749 fnode1 = VTON(fvp); 1750 fdnode = VTON(fdvp); 1751 } else { 1752 /* 1753 * From name has disappeared. 1754 */ 1755 if (doingdirectory) 1756 panic("nandfs_rename: lost dir entry"); 1757 vrele(ap->a_fvp); 1758 return (0); 1759 } 1760 1761 DPRINTF(VNCALL, ("%s: unlink source fnode:%p\n", __func__, fnode)); 1762 1763 /* 1764 * Ensure that the directory entry still exists and has not 1765 * changed while the new name has been entered. If the source is 1766 * a file then the entry may have been unlinked or renamed. In 1767 * either case there is no further work to be done. If the source 1768 * is a directory then it cannot have been rmdir'ed; its link 1769 * count of three would cause a rmdir to fail with ENOTEMPTY. 1770 * The IN_RENAME flag ensures that it cannot be moved by another 1771 * rename. 1772 */ 1773 if (fnode != fnode1) { 1774 if (doingdirectory) 1775 panic("nandfs: lost dir entry"); 1776 } else { 1777 /* 1778 * If the source is a directory with a 1779 * new parent, the link count of the old 1780 * parent directory must be decremented 1781 * and ".." set to point to the new parent. 1782 */ 1783 if (doingdirectory && newparent) { 1784 DPRINTF(VNCALL, ("%s: new parent %#jx -> %#jx\n", 1785 __func__, (uintmax_t) oldparent, 1786 (uintmax_t) newparent)); 1787 error = nandfs_update_parent_dir(fvp, newparent); 1788 if (!error) { 1789 fdnode->nn_inode.i_links_count--; 1790 fdnode->nn_flags |= IN_CHANGE; 1791 } 1792 } 1793 error = nandfs_remove_dirent(fdvp, fnode, fcnp); 1794 if (!error) { 1795 fnode->nn_inode.i_links_count--; 1796 fnode->nn_flags |= IN_CHANGE; 1797 } 1798 fnode->nn_flags &= ~IN_RENAME; 1799 } 1800 if (fdnode) 1801 vput(fdvp); 1802 if (fnode) 1803 vput(fvp); 1804 vrele(ap->a_fvp); 1805 return (error); 1806 1807 bad: 1808 DPRINTF(VNCALL, ("%s: error:%d\n", __func__, error)); 1809 if (tnode) 1810 vput(NTOV(tnode)); 1811 vput(NTOV(tdnode)); 1812 out: 1813 if (doingdirectory) 1814 fnode->nn_flags &= ~IN_RENAME; 1815 if (vn_lock(fvp, LK_EXCLUSIVE) == 0) { 1816 fnode->nn_inode.i_links_count--; 1817 fnode->nn_flags |= IN_CHANGE; 1818 fnode->nn_flags &= ~IN_RENAME; 1819 vput(fvp); 1820 } else 1821 vrele(fvp); 1822 return (error); 1823 } 1824 1825 static int 1826 nandfs_mkdir(struct vop_mkdir_args *ap) 1827 { 1828 struct vnode *dvp = ap->a_dvp; 1829 struct vnode **vpp = ap->a_vpp; 1830 struct componentname *cnp = ap->a_cnp; 1831 struct nandfs_node *dir_node = VTON(dvp); 1832 struct nandfs_inode *dir_inode = &dir_node->nn_inode; 1833 struct nandfs_node *node; 1834 struct nandfsmount *nmp = dir_node->nn_nmp; 1835 uint16_t mode = MAKEIMODE(ap->a_vap->va_type, ap->a_vap->va_mode); 1836 int error; 1837 1838 DPRINTF(VNCALL, ("%s: dvp %p\n", __func__, dvp)); 1839 1840 if (nandfs_fs_full(dir_node->nn_nandfsdev)) 1841 return (ENOSPC); 1842 1843 if (dir_inode->i_links_count >= LINK_MAX) 1844 return (EMLINK); 1845 1846 error = nandfs_node_create(nmp, &node, mode); 1847 if (error) 1848 return (error); 1849 1850 node->nn_inode.i_gid = dir_node->nn_inode.i_gid; 1851 node->nn_inode.i_uid = cnp->cn_cred->cr_uid; 1852 1853 *vpp = NTOV(node); 1854 1855 error = nandfs_add_dirent(dvp, node->nn_ino, cnp->cn_nameptr, 1856 cnp->cn_namelen, IFTODT(mode)); 1857 if (error) { 1858 vput(*vpp); 1859 return (error); 1860 } 1861 1862 dir_node->nn_inode.i_links_count++; 1863 dir_node->nn_flags |= IN_CHANGE; 1864 1865 error = nandfs_init_dir(NTOV(node), node->nn_ino, dir_node->nn_ino); 1866 if (error) { 1867 vput(NTOV(node)); 1868 return (error); 1869 } 1870 1871 DPRINTF(VNCALL, ("created dir vp %p nandnode %p ino %jx\n", *vpp, node, 1872 (uintmax_t)node->nn_ino)); 1873 return (0); 1874 } 1875 1876 static int 1877 nandfs_mknod(struct vop_mknod_args *ap) 1878 { 1879 struct vnode *dvp = ap->a_dvp; 1880 struct vnode **vpp = ap->a_vpp; 1881 struct vattr *vap = ap->a_vap; 1882 uint16_t mode = MAKEIMODE(vap->va_type, vap->va_mode); 1883 struct componentname *cnp = ap->a_cnp; 1884 struct nandfs_node *dir_node = VTON(dvp); 1885 struct nandfsmount *nmp = dir_node->nn_nmp; 1886 struct nandfs_node *node; 1887 int error; 1888 1889 if (nandfs_fs_full(dir_node->nn_nandfsdev)) 1890 return (ENOSPC); 1891 1892 error = nandfs_node_create(nmp, &node, mode); 1893 if (error) 1894 return (error); 1895 node->nn_inode.i_gid = dir_node->nn_inode.i_gid; 1896 node->nn_inode.i_uid = cnp->cn_cred->cr_uid; 1897 if (vap->va_rdev != VNOVAL) 1898 node->nn_inode.i_special = vap->va_rdev; 1899 1900 *vpp = NTOV(node); 1901 1902 if (nandfs_add_dirent(dvp, node->nn_ino, cnp->cn_nameptr, 1903 cnp->cn_namelen, IFTODT(mode))) { 1904 vput(*vpp); 1905 return (ENOTDIR); 1906 } 1907 1908 node->nn_flags |= IN_ACCESS | IN_CHANGE | IN_UPDATE; 1909 1910 return (0); 1911 } 1912 1913 static int 1914 nandfs_symlink(struct vop_symlink_args *ap) 1915 { 1916 struct vnode **vpp = ap->a_vpp; 1917 struct vnode *dvp = ap->a_dvp; 1918 uint16_t mode = MAKEIMODE(ap->a_vap->va_type, ap->a_vap->va_mode); 1919 struct componentname *cnp = ap->a_cnp; 1920 struct nandfs_node *dir_node = VTON(dvp); 1921 struct nandfsmount *nmp = dir_node->nn_nmp; 1922 struct nandfs_node *node; 1923 int len, error; 1924 1925 if (nandfs_fs_full(dir_node->nn_nandfsdev)) 1926 return (ENOSPC); 1927 1928 error = nandfs_node_create(nmp, &node, S_IFLNK | mode); 1929 if (error) 1930 return (error); 1931 node->nn_inode.i_gid = dir_node->nn_inode.i_gid; 1932 node->nn_inode.i_uid = cnp->cn_cred->cr_uid; 1933 1934 *vpp = NTOV(node); 1935 1936 if (nandfs_add_dirent(dvp, node->nn_ino, cnp->cn_nameptr, 1937 cnp->cn_namelen, IFTODT(mode))) { 1938 vput(*vpp); 1939 return (ENOTDIR); 1940 } 1941 1942 1943 len = strlen(ap->a_target); 1944 error = vn_rdwr(UIO_WRITE, *vpp, ap->a_target, len, (off_t)0, 1945 UIO_SYSSPACE, IO_NODELOCKED | IO_NOMACCHECK, 1946 cnp->cn_cred, NOCRED, NULL, NULL); 1947 if (error) 1948 vput(*vpp); 1949 1950 return (error); 1951 } 1952 1953 static int 1954 nandfs_readlink(struct vop_readlink_args *ap) 1955 { 1956 struct vnode *vp = ap->a_vp; 1957 1958 return (VOP_READ(vp, ap->a_uio, 0, ap->a_cred)); 1959 } 1960 1961 static int 1962 nandfs_rmdir(struct vop_rmdir_args *ap) 1963 { 1964 struct vnode *vp = ap->a_vp; 1965 struct vnode *dvp = ap->a_dvp; 1966 struct componentname *cnp = ap->a_cnp; 1967 struct nandfs_node *node, *dnode; 1968 uint32_t dflag, flag; 1969 int error = 0; 1970 1971 node = VTON(vp); 1972 dnode = VTON(dvp); 1973 1974 /* Files marked as immutable or append-only cannot be deleted. */ 1975 if ((node->nn_inode.i_flags & (IMMUTABLE | APPEND | NOUNLINK)) || 1976 (dnode->nn_inode.i_flags & APPEND)) 1977 return (EPERM); 1978 1979 DPRINTF(VNCALL, ("%s: dvp %p vp %p nandnode %p ino %#jx\n", __func__, 1980 dvp, vp, node, (uintmax_t)node->nn_ino)); 1981 1982 if (node->nn_inode.i_links_count < 2) 1983 return (EINVAL); 1984 1985 if (!nandfs_dirempty(vp, dnode->nn_ino, cnp->cn_cred)) 1986 return (ENOTEMPTY); 1987 1988 /* Files marked as immutable or append-only cannot be deleted. */ 1989 dflag = dnode->nn_inode.i_flags; 1990 flag = node->nn_inode.i_flags; 1991 if ((dflag & APPEND) || 1992 (flag & (NOUNLINK | IMMUTABLE | APPEND))) { 1993 return (EPERM); 1994 } 1995 1996 if (vp->v_mountedhere != 0) 1997 return (EINVAL); 1998 1999 nandfs_remove_dirent(dvp, node, cnp); 2000 dnode->nn_inode.i_links_count -= 1; 2001 dnode->nn_flags |= IN_CHANGE; 2002 2003 cache_purge(dvp); 2004 2005 error = nandfs_truncate(vp, (uint64_t)0); 2006 if (error) 2007 return (error); 2008 2009 node->nn_inode.i_links_count -= 2; 2010 node->nn_flags |= IN_CHANGE; 2011 2012 cache_purge(vp); 2013 2014 return (error); 2015 } 2016 2017 static int 2018 nandfs_fsync(struct vop_fsync_args *ap) 2019 { 2020 struct vnode *vp = ap->a_vp; 2021 struct nandfs_node *node = VTON(vp); 2022 int locked; 2023 2024 DPRINTF(VNCALL, ("%s: vp %p nandnode %p ino %#jx\n", __func__, vp, 2025 node, (uintmax_t)node->nn_ino)); 2026 2027 /* 2028 * Start syncing vnode only if inode was modified or 2029 * there are some dirty buffers 2030 */ 2031 if (VTON(vp)->nn_flags & IN_MODIFIED || 2032 vp->v_bufobj.bo_dirty.bv_cnt) { 2033 locked = VOP_ISLOCKED(vp); 2034 VOP_UNLOCK(vp, 0); 2035 nandfs_wakeup_wait_sync(node->nn_nandfsdev, SYNCER_FSYNC); 2036 VOP_LOCK(vp, locked | LK_RETRY); 2037 } 2038 2039 return (0); 2040 } 2041 2042 static int 2043 nandfs_bmap(struct vop_bmap_args *ap) 2044 { 2045 struct vnode *vp = ap->a_vp; 2046 struct nandfs_node *nnode = VTON(vp); 2047 struct nandfs_device *nandfsdev = nnode->nn_nandfsdev; 2048 nandfs_daddr_t l2vmap, v2pmap; 2049 int error; 2050 int blk2dev = nandfsdev->nd_blocksize / DEV_BSIZE; 2051 2052 DPRINTF(VNCALL, ("%s: vp %p nandnode %p ino %#jx\n", __func__, vp, 2053 nnode, (uintmax_t)nnode->nn_ino)); 2054 2055 if (ap->a_bop != NULL) 2056 *ap->a_bop = &nandfsdev->nd_devvp->v_bufobj; 2057 if (ap->a_bnp == NULL) 2058 return (0); 2059 if (ap->a_runp != NULL) 2060 *ap->a_runp = 0; 2061 if (ap->a_runb != NULL) 2062 *ap->a_runb = 0; 2063 2064 /* 2065 * Translate all the block sectors into a series of buffers to read 2066 * asynchronously from the nandfs device. Note that this lookup may 2067 * induce readin's too. 2068 */ 2069 2070 /* Get virtual block numbers for the vnode's buffer span */ 2071 error = nandfs_bmap_lookup(nnode, ap->a_bn, &l2vmap); 2072 if (error) 2073 return (-1); 2074 2075 /* Translate virtual block numbers to physical block numbers */ 2076 error = nandfs_vtop(nnode, l2vmap, &v2pmap); 2077 if (error) 2078 return (-1); 2079 2080 /* Note virtual block 0 marks not mapped */ 2081 if (l2vmap == 0) 2082 *ap->a_bnp = -1; 2083 else 2084 *ap->a_bnp = v2pmap * blk2dev; /* in DEV_BSIZE */ 2085 2086 DPRINTF(VNCALL, ("%s: vp %p nandnode %p ino %#jx lblk %jx -> blk %jx\n", 2087 __func__, vp, nnode, (uintmax_t)nnode->nn_ino, (uintmax_t)ap->a_bn, 2088 (uintmax_t)*ap->a_bnp )); 2089 2090 return (0); 2091 } 2092 2093 static void 2094 nandfs_force_syncer(struct nandfsmount *nmp) 2095 { 2096 2097 nmp->nm_flags |= NANDFS_FORCE_SYNCER; 2098 nandfs_wakeup_wait_sync(nmp->nm_nandfsdev, SYNCER_FFORCE); 2099 } 2100 2101 static int 2102 nandfs_ioctl(struct vop_ioctl_args *ap) 2103 { 2104 struct vnode *vp = ap->a_vp; 2105 u_long command = ap->a_command; 2106 caddr_t data = ap->a_data; 2107 struct nandfs_node *node = VTON(vp); 2108 struct nandfs_device *nandfsdev = node->nn_nandfsdev; 2109 struct nandfsmount *nmp = node->nn_nmp; 2110 uint64_t *tab, *cno; 2111 struct nandfs_seg_stat *nss; 2112 struct nandfs_cpmode *ncpm; 2113 struct nandfs_argv *nargv; 2114 struct nandfs_cpstat *ncp; 2115 int error; 2116 2117 DPRINTF(VNCALL, ("%s: %x\n", __func__, (uint32_t)command)); 2118 2119 error = priv_check(ap->a_td, PRIV_VFS_MOUNT); 2120 if (error) 2121 return (error); 2122 2123 if (nmp->nm_ronly) { 2124 switch (command) { 2125 case NANDFS_IOCTL_GET_FSINFO: 2126 case NANDFS_IOCTL_GET_SUSTAT: 2127 case NANDFS_IOCTL_GET_CPINFO: 2128 case NANDFS_IOCTL_GET_CPSTAT: 2129 case NANDFS_IOCTL_GET_SUINFO: 2130 case NANDFS_IOCTL_GET_VINFO: 2131 case NANDFS_IOCTL_GET_BDESCS: 2132 break; 2133 default: 2134 return (EROFS); 2135 } 2136 } 2137 2138 switch (command) { 2139 case NANDFS_IOCTL_GET_FSINFO: 2140 error = nandfs_get_fsinfo(nmp, (struct nandfs_fsinfo *)data); 2141 break; 2142 case NANDFS_IOCTL_GET_SUSTAT: 2143 nss = (struct nandfs_seg_stat *)data; 2144 error = nandfs_get_seg_stat(nandfsdev, nss); 2145 break; 2146 case NANDFS_IOCTL_CHANGE_CPMODE: 2147 ncpm = (struct nandfs_cpmode *)data; 2148 error = nandfs_chng_cpmode(nandfsdev->nd_cp_node, ncpm); 2149 nandfs_force_syncer(nmp); 2150 break; 2151 case NANDFS_IOCTL_GET_CPINFO: 2152 nargv = (struct nandfs_argv *)data; 2153 error = nandfs_get_cpinfo_ioctl(nandfsdev->nd_cp_node, nargv); 2154 break; 2155 case NANDFS_IOCTL_DELETE_CP: 2156 tab = (uint64_t *)data; 2157 error = nandfs_delete_cp(nandfsdev->nd_cp_node, tab[0], tab[1]); 2158 nandfs_force_syncer(nmp); 2159 break; 2160 case NANDFS_IOCTL_GET_CPSTAT: 2161 ncp = (struct nandfs_cpstat *)data; 2162 error = nandfs_get_cpstat(nandfsdev->nd_cp_node, ncp); 2163 break; 2164 case NANDFS_IOCTL_GET_SUINFO: 2165 nargv = (struct nandfs_argv *)data; 2166 error = nandfs_get_segment_info_ioctl(nandfsdev, nargv); 2167 break; 2168 case NANDFS_IOCTL_GET_VINFO: 2169 nargv = (struct nandfs_argv *)data; 2170 error = nandfs_get_dat_vinfo_ioctl(nandfsdev, nargv); 2171 break; 2172 case NANDFS_IOCTL_GET_BDESCS: 2173 nargv = (struct nandfs_argv *)data; 2174 error = nandfs_get_dat_bdescs_ioctl(nandfsdev, nargv); 2175 break; 2176 case NANDFS_IOCTL_SYNC: 2177 cno = (uint64_t *)data; 2178 nandfs_force_syncer(nmp); 2179 *cno = nandfsdev->nd_last_cno; 2180 error = 0; 2181 break; 2182 case NANDFS_IOCTL_MAKE_SNAP: 2183 cno = (uint64_t *)data; 2184 error = nandfs_make_snap(nandfsdev, cno); 2185 nandfs_force_syncer(nmp); 2186 break; 2187 case NANDFS_IOCTL_DELETE_SNAP: 2188 cno = (uint64_t *)data; 2189 error = nandfs_delete_snap(nandfsdev, *cno); 2190 nandfs_force_syncer(nmp); 2191 break; 2192 default: 2193 error = ENOTTY; 2194 break; 2195 } 2196 2197 return (error); 2198 } 2199 2200 /* 2201 * Whiteout vnode call 2202 */ 2203 static int 2204 nandfs_whiteout(struct vop_whiteout_args *ap) 2205 { 2206 struct vnode *dvp = ap->a_dvp; 2207 struct componentname *cnp = ap->a_cnp; 2208 int error = 0; 2209 2210 switch (ap->a_flags) { 2211 case LOOKUP: 2212 return (0); 2213 case CREATE: 2214 /* Create a new directory whiteout */ 2215 #ifdef INVARIANTS 2216 if ((cnp->cn_flags & SAVENAME) == 0) 2217 panic("ufs_whiteout: missing name"); 2218 #endif 2219 error = nandfs_add_dirent(dvp, NANDFS_WHT_INO, cnp->cn_nameptr, 2220 cnp->cn_namelen, DT_WHT); 2221 break; 2222 2223 case DELETE: 2224 /* Remove an existing directory whiteout */ 2225 cnp->cn_flags &= ~DOWHITEOUT; 2226 error = nandfs_remove_dirent(dvp, NULL, cnp); 2227 break; 2228 default: 2229 panic("nandf_whiteout: unknown op: %d", ap->a_flags); 2230 } 2231 2232 return (error); 2233 } 2234 2235 static int 2236 nandfs_pathconf(struct vop_pathconf_args *ap) 2237 { 2238 int error; 2239 2240 error = 0; 2241 switch (ap->a_name) { 2242 case _PC_LINK_MAX: 2243 *ap->a_retval = LINK_MAX; 2244 break; 2245 case _PC_NAME_MAX: 2246 *ap->a_retval = NAME_MAX; 2247 break; 2248 case _PC_PATH_MAX: 2249 *ap->a_retval = PATH_MAX; 2250 break; 2251 case _PC_PIPE_BUF: 2252 *ap->a_retval = PIPE_BUF; 2253 break; 2254 case _PC_CHOWN_RESTRICTED: 2255 *ap->a_retval = 1; 2256 break; 2257 case _PC_NO_TRUNC: 2258 *ap->a_retval = 1; 2259 break; 2260 case _PC_ACL_EXTENDED: 2261 *ap->a_retval = 0; 2262 break; 2263 case _PC_ALLOC_SIZE_MIN: 2264 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_bsize; 2265 break; 2266 case _PC_FILESIZEBITS: 2267 *ap->a_retval = 64; 2268 break; 2269 case _PC_REC_INCR_XFER_SIZE: 2270 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_iosize; 2271 break; 2272 case _PC_REC_MAX_XFER_SIZE: 2273 *ap->a_retval = -1; /* means ``unlimited'' */ 2274 break; 2275 case _PC_REC_MIN_XFER_SIZE: 2276 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_iosize; 2277 break; 2278 default: 2279 error = EINVAL; 2280 break; 2281 } 2282 return (error); 2283 } 2284 2285 static int 2286 nandfs_vnlock1(struct vop_lock1_args *ap) 2287 { 2288 struct vnode *vp = ap->a_vp; 2289 struct nandfs_node *node = VTON(vp); 2290 int error, vi_locked; 2291 2292 /* 2293 * XXX can vnode go away while we are sleeping? 2294 */ 2295 vi_locked = mtx_owned(&vp->v_interlock); 2296 if (vi_locked) 2297 VI_UNLOCK(vp); 2298 error = NANDFS_WRITELOCKFLAGS(node->nn_nandfsdev, 2299 ap->a_flags & LK_NOWAIT); 2300 if (vi_locked && !error) 2301 VI_LOCK(vp); 2302 if (error) 2303 return (error); 2304 2305 error = vop_stdlock(ap); 2306 if (error) { 2307 NANDFS_WRITEUNLOCK(node->nn_nandfsdev); 2308 return (error); 2309 } 2310 2311 return (0); 2312 } 2313 2314 static int 2315 nandfs_vnunlock(struct vop_unlock_args *ap) 2316 { 2317 struct vnode *vp = ap->a_vp; 2318 struct nandfs_node *node = VTON(vp); 2319 int error; 2320 2321 error = vop_stdunlock(ap); 2322 if (error) 2323 return (error); 2324 2325 NANDFS_WRITEUNLOCK(node->nn_nandfsdev); 2326 2327 return (0); 2328 } 2329 2330 /* 2331 * Global vfs data structures 2332 */ 2333 struct vop_vector nandfs_vnodeops = { 2334 .vop_default = &default_vnodeops, 2335 .vop_access = nandfs_access, 2336 .vop_advlock = nandfs_advlock, 2337 .vop_bmap = nandfs_bmap, 2338 .vop_close = nandfs_close, 2339 .vop_create = nandfs_create, 2340 .vop_fsync = nandfs_fsync, 2341 .vop_getattr = nandfs_getattr, 2342 .vop_inactive = nandfs_inactive, 2343 .vop_cachedlookup = nandfs_lookup, 2344 .vop_ioctl = nandfs_ioctl, 2345 .vop_link = nandfs_link, 2346 .vop_lookup = vfs_cache_lookup, 2347 .vop_mkdir = nandfs_mkdir, 2348 .vop_mknod = nandfs_mknod, 2349 .vop_open = nandfs_open, 2350 .vop_pathconf = nandfs_pathconf, 2351 .vop_print = nandfs_print, 2352 .vop_read = nandfs_read, 2353 .vop_readdir = nandfs_readdir, 2354 .vop_readlink = nandfs_readlink, 2355 .vop_reclaim = nandfs_reclaim, 2356 .vop_remove = nandfs_remove, 2357 .vop_rename = nandfs_rename, 2358 .vop_rmdir = nandfs_rmdir, 2359 .vop_whiteout = nandfs_whiteout, 2360 .vop_write = nandfs_write, 2361 .vop_setattr = nandfs_setattr, 2362 .vop_strategy = nandfs_strategy, 2363 .vop_symlink = nandfs_symlink, 2364 .vop_lock1 = nandfs_vnlock1, 2365 .vop_unlock = nandfs_vnunlock, 2366 }; 2367 2368 struct vop_vector nandfs_system_vnodeops = { 2369 .vop_default = &default_vnodeops, 2370 .vop_close = nandfs_close, 2371 .vop_inactive = nandfs_inactive, 2372 .vop_reclaim = nandfs_reclaim, 2373 .vop_strategy = nandfs_strategy, 2374 .vop_fsync = nandfs_fsync, 2375 .vop_bmap = nandfs_bmap, 2376 .vop_access = VOP_PANIC, 2377 .vop_advlock = VOP_PANIC, 2378 .vop_create = VOP_PANIC, 2379 .vop_getattr = VOP_PANIC, 2380 .vop_cachedlookup = VOP_PANIC, 2381 .vop_ioctl = VOP_PANIC, 2382 .vop_link = VOP_PANIC, 2383 .vop_lookup = VOP_PANIC, 2384 .vop_mkdir = VOP_PANIC, 2385 .vop_mknod = VOP_PANIC, 2386 .vop_open = VOP_PANIC, 2387 .vop_pathconf = VOP_PANIC, 2388 .vop_print = VOP_PANIC, 2389 .vop_read = VOP_PANIC, 2390 .vop_readdir = VOP_PANIC, 2391 .vop_readlink = VOP_PANIC, 2392 .vop_remove = VOP_PANIC, 2393 .vop_rename = VOP_PANIC, 2394 .vop_rmdir = VOP_PANIC, 2395 .vop_whiteout = VOP_PANIC, 2396 .vop_write = VOP_PANIC, 2397 .vop_setattr = VOP_PANIC, 2398 .vop_symlink = VOP_PANIC, 2399 }; 2400 2401 static int 2402 nandfsfifo_close(struct vop_close_args *ap) 2403 { 2404 struct vnode *vp = ap->a_vp; 2405 struct nandfs_node *node = VTON(vp); 2406 2407 DPRINTF(VNCALL, ("%s: vp %p node %p\n", __func__, vp, node)); 2408 2409 mtx_lock(&vp->v_interlock); 2410 if (vp->v_usecount > 1) 2411 nandfs_itimes_locked(vp); 2412 mtx_unlock(&vp->v_interlock); 2413 2414 return (fifo_specops.vop_close(ap)); 2415 } 2416 2417 struct vop_vector nandfs_fifoops = { 2418 .vop_default = &fifo_specops, 2419 .vop_fsync = VOP_PANIC, 2420 .vop_access = nandfs_access, 2421 .vop_close = nandfsfifo_close, 2422 .vop_getattr = nandfs_getattr, 2423 .vop_inactive = nandfs_inactive, 2424 .vop_print = nandfs_print, 2425 .vop_read = VOP_PANIC, 2426 .vop_reclaim = nandfs_reclaim, 2427 .vop_setattr = nandfs_setattr, 2428 .vop_write = VOP_PANIC, 2429 .vop_lock1 = nandfs_vnlock1, 2430 .vop_unlock = nandfs_vnunlock, 2431 }; 2432 2433 int 2434 nandfs_vinit(struct vnode *vp, uint64_t ino) 2435 { 2436 struct nandfs_node *node; 2437 2438 ASSERT_VOP_LOCKED(vp, __func__); 2439 2440 node = VTON(vp); 2441 2442 /* Check if we're fetching the root */ 2443 if (ino == NANDFS_ROOT_INO) 2444 vp->v_vflag |= VV_ROOT; 2445 2446 if (ino != NANDFS_GC_INO) 2447 vp->v_type = IFTOVT(node->nn_inode.i_mode); 2448 else 2449 vp->v_type = VREG; 2450 2451 if (vp->v_type == VFIFO) 2452 vp->v_op = &nandfs_fifoops; 2453 2454 return (0); 2455 }
Cache object: 9ab814337226958cb68ae765883b402a
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