ffs_vnops.c revision 1.93.2.3
1 /* $NetBSD: ffs_vnops.c,v 1.93.2.3 2007/12/10 19:28:07 ad Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1989, 1993 5 * The Regents of the University of California. 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 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)ffs_vnops.c 8.15 (Berkeley) 5/14/95 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: ffs_vnops.c,v 1.93.2.3 2007/12/10 19:28:07 ad Exp $"); 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/resourcevar.h> 40 #include <sys/kernel.h> 41 #include <sys/file.h> 42 #include <sys/stat.h> 43 #include <sys/buf.h> 44 #include <sys/event.h> 45 #include <sys/proc.h> 46 #include <sys/mount.h> 47 #include <sys/vnode.h> 48 #include <sys/pool.h> 49 #include <sys/signalvar.h> 50 #include <sys/kauth.h> 51 #include <sys/fstrans.h> 52 53 #include <miscfs/fifofs/fifo.h> 54 #include <miscfs/genfs/genfs.h> 55 #include <miscfs/specfs/specdev.h> 56 57 #include <ufs/ufs/inode.h> 58 #include <ufs/ufs/dir.h> 59 #include <ufs/ufs/ufs_extern.h> 60 #include <ufs/ufs/ufsmount.h> 61 62 #include <ufs/ffs/fs.h> 63 #include <ufs/ffs/ffs_extern.h> 64 65 #include <uvm/uvm.h> 66 67 /* Global vfs data structures for ufs. */ 68 int (**ffs_vnodeop_p)(void *); 69 const struct vnodeopv_entry_desc ffs_vnodeop_entries[] = { 70 { &vop_default_desc, vn_default_error }, 71 { &vop_lookup_desc, ufs_lookup }, /* lookup */ 72 { &vop_create_desc, ufs_create }, /* create */ 73 { &vop_whiteout_desc, ufs_whiteout }, /* whiteout */ 74 { &vop_mknod_desc, ufs_mknod }, /* mknod */ 75 { &vop_open_desc, ufs_open }, /* open */ 76 { &vop_close_desc, ufs_close }, /* close */ 77 { &vop_access_desc, ufs_access }, /* access */ 78 { &vop_getattr_desc, ufs_getattr }, /* getattr */ 79 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 80 { &vop_read_desc, ffs_read }, /* read */ 81 { &vop_write_desc, ffs_write }, /* write */ 82 { &vop_lease_desc, ufs_lease_check }, /* lease */ 83 { &vop_ioctl_desc, ufs_ioctl }, /* ioctl */ 84 { &vop_fcntl_desc, ufs_fcntl }, /* fcntl */ 85 { &vop_poll_desc, ufs_poll }, /* poll */ 86 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ 87 { &vop_revoke_desc, ufs_revoke }, /* revoke */ 88 { &vop_mmap_desc, ufs_mmap }, /* mmap */ 89 { &vop_fsync_desc, ffs_fsync }, /* fsync */ 90 { &vop_seek_desc, ufs_seek }, /* seek */ 91 { &vop_remove_desc, ufs_remove }, /* remove */ 92 { &vop_link_desc, ufs_link }, /* link */ 93 { &vop_rename_desc, ufs_rename }, /* rename */ 94 { &vop_mkdir_desc, ufs_mkdir }, /* mkdir */ 95 { &vop_rmdir_desc, ufs_rmdir }, /* rmdir */ 96 { &vop_symlink_desc, ufs_symlink }, /* symlink */ 97 { &vop_readdir_desc, ufs_readdir }, /* readdir */ 98 { &vop_readlink_desc, ufs_readlink }, /* readlink */ 99 { &vop_abortop_desc, ufs_abortop }, /* abortop */ 100 { &vop_inactive_desc, ufs_inactive }, /* inactive */ 101 { &vop_reclaim_desc, ffs_reclaim }, /* reclaim */ 102 { &vop_lock_desc, ffs_lock }, /* lock */ 103 { &vop_unlock_desc, ffs_unlock }, /* unlock */ 104 { &vop_bmap_desc, ufs_bmap }, /* bmap */ 105 { &vop_strategy_desc, ufs_strategy }, /* strategy */ 106 { &vop_print_desc, ufs_print }, /* print */ 107 { &vop_islocked_desc, ffs_islocked }, /* islocked */ 108 { &vop_pathconf_desc, ufs_pathconf }, /* pathconf */ 109 { &vop_advlock_desc, ufs_advlock }, /* advlock */ 110 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 111 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 112 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 113 { &vop_openextattr_desc, ffs_openextattr }, /* openextattr */ 114 { &vop_closeextattr_desc, ffs_closeextattr }, /* closeextattr */ 115 { &vop_getextattr_desc, ffs_getextattr }, /* getextattr */ 116 { &vop_setextattr_desc, ffs_setextattr }, /* setextattr */ 117 { &vop_listextattr_desc, ffs_listextattr }, /* listextattr */ 118 { &vop_deleteextattr_desc, ffs_deleteextattr }, /* deleteextattr */ 119 { NULL, NULL } 120 }; 121 const struct vnodeopv_desc ffs_vnodeop_opv_desc = 122 { &ffs_vnodeop_p, ffs_vnodeop_entries }; 123 124 int (**ffs_specop_p)(void *); 125 const struct vnodeopv_entry_desc ffs_specop_entries[] = { 126 { &vop_default_desc, vn_default_error }, 127 { &vop_lookup_desc, spec_lookup }, /* lookup */ 128 { &vop_create_desc, spec_create }, /* create */ 129 { &vop_mknod_desc, spec_mknod }, /* mknod */ 130 { &vop_open_desc, spec_open }, /* open */ 131 { &vop_close_desc, ufsspec_close }, /* close */ 132 { &vop_access_desc, ufs_access }, /* access */ 133 { &vop_getattr_desc, ufs_getattr }, /* getattr */ 134 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 135 { &vop_read_desc, ufsspec_read }, /* read */ 136 { &vop_write_desc, ufsspec_write }, /* write */ 137 { &vop_lease_desc, spec_lease_check }, /* lease */ 138 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 139 { &vop_fcntl_desc, ufs_fcntl }, /* fcntl */ 140 { &vop_poll_desc, spec_poll }, /* poll */ 141 { &vop_kqfilter_desc, spec_kqfilter }, /* kqfilter */ 142 { &vop_revoke_desc, spec_revoke }, /* revoke */ 143 { &vop_mmap_desc, spec_mmap }, /* mmap */ 144 { &vop_fsync_desc, ffs_fsync }, /* fsync */ 145 { &vop_seek_desc, spec_seek }, /* seek */ 146 { &vop_remove_desc, spec_remove }, /* remove */ 147 { &vop_link_desc, spec_link }, /* link */ 148 { &vop_rename_desc, spec_rename }, /* rename */ 149 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 150 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 151 { &vop_symlink_desc, spec_symlink }, /* symlink */ 152 { &vop_readdir_desc, spec_readdir }, /* readdir */ 153 { &vop_readlink_desc, spec_readlink }, /* readlink */ 154 { &vop_abortop_desc, spec_abortop }, /* abortop */ 155 { &vop_inactive_desc, ufs_inactive }, /* inactive */ 156 { &vop_reclaim_desc, ffs_reclaim }, /* reclaim */ 157 { &vop_lock_desc, ffs_lock }, /* lock */ 158 { &vop_unlock_desc, ffs_unlock }, /* unlock */ 159 { &vop_bmap_desc, spec_bmap }, /* bmap */ 160 { &vop_strategy_desc, spec_strategy }, /* strategy */ 161 { &vop_print_desc, ufs_print }, /* print */ 162 { &vop_islocked_desc, ffs_islocked }, /* islocked */ 163 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 164 { &vop_advlock_desc, spec_advlock }, /* advlock */ 165 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 166 { &vop_getpages_desc, spec_getpages }, /* getpages */ 167 { &vop_putpages_desc, spec_putpages }, /* putpages */ 168 { &vop_openextattr_desc, ffs_openextattr }, /* openextattr */ 169 { &vop_closeextattr_desc, ffs_closeextattr }, /* closeextattr */ 170 { &vop_getextattr_desc, ffs_getextattr }, /* getextattr */ 171 { &vop_setextattr_desc, ffs_setextattr }, /* setextattr */ 172 { &vop_listextattr_desc, ffs_listextattr }, /* listextattr */ 173 { &vop_deleteextattr_desc, ffs_deleteextattr }, /* deleteextattr */ 174 { NULL, NULL } 175 }; 176 const struct vnodeopv_desc ffs_specop_opv_desc = 177 { &ffs_specop_p, ffs_specop_entries }; 178 179 int (**ffs_fifoop_p)(void *); 180 const struct vnodeopv_entry_desc ffs_fifoop_entries[] = { 181 { &vop_default_desc, vn_default_error }, 182 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 183 { &vop_create_desc, fifo_create }, /* create */ 184 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 185 { &vop_open_desc, fifo_open }, /* open */ 186 { &vop_close_desc, ufsfifo_close }, /* close */ 187 { &vop_access_desc, ufs_access }, /* access */ 188 { &vop_getattr_desc, ufs_getattr }, /* getattr */ 189 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 190 { &vop_read_desc, ufsfifo_read }, /* read */ 191 { &vop_write_desc, ufsfifo_write }, /* write */ 192 { &vop_lease_desc, fifo_lease_check }, /* lease */ 193 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 194 { &vop_fcntl_desc, ufs_fcntl }, /* fcntl */ 195 { &vop_poll_desc, fifo_poll }, /* poll */ 196 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 197 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 198 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 199 { &vop_fsync_desc, ffs_fsync }, /* fsync */ 200 { &vop_seek_desc, fifo_seek }, /* seek */ 201 { &vop_remove_desc, fifo_remove }, /* remove */ 202 { &vop_link_desc, fifo_link }, /* link */ 203 { &vop_rename_desc, fifo_rename }, /* rename */ 204 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 205 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 206 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 207 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 208 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 209 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 210 { &vop_inactive_desc, ufs_inactive }, /* inactive */ 211 { &vop_reclaim_desc, ffs_reclaim }, /* reclaim */ 212 { &vop_lock_desc, ffs_lock }, /* lock */ 213 { &vop_unlock_desc, ffs_unlock }, /* unlock */ 214 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 215 { &vop_strategy_desc, fifo_strategy }, /* strategy */ 216 { &vop_print_desc, ufs_print }, /* print */ 217 { &vop_islocked_desc, ffs_islocked }, /* islocked */ 218 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 219 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 220 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 221 { &vop_putpages_desc, fifo_putpages }, /* putpages */ 222 { &vop_openextattr_desc, ffs_openextattr }, /* openextattr */ 223 { &vop_closeextattr_desc, ffs_closeextattr }, /* closeextattr */ 224 { &vop_getextattr_desc, ffs_getextattr }, /* getextattr */ 225 { &vop_setextattr_desc, ffs_setextattr }, /* setextattr */ 226 { &vop_listextattr_desc, ffs_listextattr }, /* listextattr */ 227 { &vop_deleteextattr_desc, ffs_deleteextattr }, /* deleteextattr */ 228 { NULL, NULL } 229 }; 230 const struct vnodeopv_desc ffs_fifoop_opv_desc = 231 { &ffs_fifoop_p, ffs_fifoop_entries }; 232 233 #include <ufs/ufs/ufs_readwrite.c> 234 235 int 236 ffs_fsync(void *v) 237 { 238 struct vop_fsync_args /* { 239 struct vnode *a_vp; 240 kauth_cred_t a_cred; 241 int a_flags; 242 off_t a_offlo; 243 off_t a_offhi; 244 struct lwp *a_l; 245 } */ *ap = v; 246 struct buf *bp; 247 int num, error, i; 248 struct indir ia[NIADDR + 1]; 249 int bsize; 250 daddr_t blk_high; 251 struct vnode *vp; 252 253 vp = ap->a_vp; 254 255 fstrans_start(vp->v_mount, FSTRANS_LAZY); 256 /* 257 * XXX no easy way to sync a range in a file with softdep. 258 */ 259 if ((ap->a_offlo == 0 && ap->a_offhi == 0) || DOINGSOFTDEP(vp) || 260 (vp->v_type != VREG)) { 261 error = ffs_full_fsync(vp, ap->a_flags); 262 goto out; 263 } 264 265 bsize = vp->v_mount->mnt_stat.f_iosize; 266 blk_high = ap->a_offhi / bsize; 267 if (ap->a_offhi % bsize != 0) 268 blk_high++; 269 270 /* 271 * First, flush all pages in range. 272 */ 273 274 mutex_enter(&vp->v_interlock); 275 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 276 round_page(ap->a_offhi), PGO_CLEANIT | 277 ((ap->a_flags & FSYNC_WAIT) ? PGO_SYNCIO : 0)); 278 if (error) { 279 goto out; 280 } 281 282 /* 283 * Then, flush indirect blocks. 284 */ 285 286 if (blk_high >= NDADDR) { 287 error = ufs_getlbns(vp, blk_high, ia, &num); 288 if (error) 289 goto out; 290 291 mutex_enter(&bufcache_lock); 292 for (i = 0; i < num; i++) { 293 if ((bp = incore(vp, ia[i].in_lbn)) == NULL) 294 continue; 295 if ((bp->b_cflags & BC_BUSY) != 0 || 296 (bp->b_oflags & BO_DELWRI) == 0) 297 continue; 298 bp->b_cflags |= BC_BUSY | BC_VFLUSH; 299 mutex_exit(&bufcache_lock); 300 bawrite(bp); 301 mutex_enter(&bufcache_lock); 302 } 303 mutex_exit(&bufcache_lock); 304 } 305 306 if (ap->a_flags & FSYNC_WAIT) { 307 mutex_enter(&vp->v_interlock); 308 while (vp->v_numoutput > 0) 309 cv_wait(&vp->v_cv, &vp->v_interlock); 310 mutex_exit(&vp->v_interlock); 311 } 312 313 error = ffs_update(vp, NULL, NULL, 314 ((ap->a_flags & (FSYNC_WAIT | FSYNC_DATAONLY)) == FSYNC_WAIT) 315 ? UPDATE_WAIT : 0); 316 317 if (error == 0 && ap->a_flags & FSYNC_CACHE) { 318 int l = 0; 319 VOP_IOCTL(VTOI(vp)->i_devvp, DIOCCACHESYNC, &l, FWRITE, 320 curlwp->l_cred); 321 } 322 323 out: 324 fstrans_done(vp->v_mount); 325 return error; 326 } 327 328 /* 329 * Synch an open file. 330 */ 331 /* ARGSUSED */ 332 int 333 ffs_full_fsync(struct vnode *vp, int flags) 334 { 335 struct buf *bp, *nbp; 336 int error, passes, skipmeta, inodedeps_only, waitfor; 337 338 if (vp->v_type == VBLK && 339 vp->v_specmountpoint != NULL && 340 (vp->v_specmountpoint->mnt_flag & MNT_SOFTDEP)) 341 softdep_fsync_mountdev(vp); 342 343 mutex_enter(&vp->v_interlock); 344 345 inodedeps_only = DOINGSOFTDEP(vp) && (flags & FSYNC_RECLAIM) 346 && UVM_OBJ_IS_CLEAN(&vp->v_uobj) && LIST_EMPTY(&vp->v_dirtyblkhd); 347 348 /* 349 * Flush all dirty data associated with a vnode. 350 */ 351 352 if (vp->v_type == VREG || vp->v_type == VBLK) { 353 error = VOP_PUTPAGES(vp, 0, 0, PGO_ALLPAGES | PGO_CLEANIT | 354 ((flags & FSYNC_WAIT) ? PGO_SYNCIO : 0) | 355 (fstrans_getstate(vp->v_mount) == FSTRANS_SUSPENDING ? 356 PGO_FREE : 0)); 357 if (error) { 358 return error; 359 } 360 } else 361 mutex_exit(&vp->v_interlock); 362 363 passes = NIADDR + 1; 364 skipmeta = 0; 365 if (flags & FSYNC_WAIT) 366 skipmeta = 1; 367 368 loop: 369 mutex_enter(&bufcache_lock); 370 LIST_FOREACH(bp, &vp->v_dirtyblkhd, b_vnbufs) { 371 bp->b_cflags &= ~BC_SCANNED; 372 } 373 for (bp = LIST_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { 374 nbp = LIST_NEXT(bp, b_vnbufs); 375 if (bp->b_cflags & (BC_BUSY | BC_SCANNED)) 376 continue; 377 if ((bp->b_oflags & BO_DELWRI) == 0) 378 panic("ffs_fsync: not dirty"); 379 if (skipmeta && bp->b_lblkno < 0) 380 continue; 381 bp->b_cflags |= BC_BUSY | BC_VFLUSH | BC_SCANNED; 382 mutex_exit(&bufcache_lock); 383 /* 384 * On our final pass through, do all I/O synchronously 385 * so that we can find out if our flush is failing 386 * because of write errors. 387 */ 388 if (passes > 0 || !(flags & FSYNC_WAIT)) 389 (void) bawrite(bp); 390 else if ((error = bwrite(bp)) != 0) 391 return (error); 392 /* 393 * Since we unlocked during the I/O, we need 394 * to start from a known point. 395 */ 396 mutex_enter(&bufcache_lock); 397 nbp = LIST_FIRST(&vp->v_dirtyblkhd); 398 } 399 mutex_exit(&bufcache_lock); 400 if (skipmeta) { 401 skipmeta = 0; 402 goto loop; 403 } 404 405 if (flags & FSYNC_WAIT) { 406 mutex_enter(&vp->v_interlock); 407 while (vp->v_numoutput) { 408 cv_wait(&vp->v_cv, &vp->v_interlock); 409 } 410 mutex_exit(&vp->v_interlock); 411 412 /* 413 * Ensure that any filesystem metadata associated 414 * with the vnode has been written. 415 */ 416 if ((error = softdep_sync_metadata(vp)) != 0) 417 return (error); 418 419 if (!LIST_EMPTY(&vp->v_dirtyblkhd)) { 420 /* 421 * Block devices associated with filesystems may 422 * have new I/O requests posted for them even if 423 * the vnode is locked, so no amount of trying will 424 * get them clean. Thus we give block devices a 425 * good effort, then just give up. For all other file 426 * types, go around and try again until it is clean. 427 */ 428 if (passes > 0) { 429 passes--; 430 goto loop; 431 } 432 #ifdef DIAGNOSTIC 433 if (vp->v_type != VBLK) 434 vprint("ffs_fsync: dirty", vp); 435 #endif 436 } 437 } 438 439 if (inodedeps_only) 440 waitfor = 0; 441 else 442 waitfor = (flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 443 error = ffs_update(vp, NULL, NULL, waitfor); 444 445 if (error == 0 && flags & FSYNC_CACHE) { 446 int i = 0; 447 VOP_IOCTL(VTOI(vp)->i_devvp, DIOCCACHESYNC, &i, FWRITE, 448 curlwp->l_cred); 449 } 450 451 return error; 452 } 453 454 /* 455 * Reclaim an inode so that it can be used for other purposes. 456 */ 457 int 458 ffs_reclaim(void *v) 459 { 460 struct vop_reclaim_args /* { 461 struct vnode *a_vp; 462 struct lwp *a_l; 463 } */ *ap = v; 464 struct vnode *vp = ap->a_vp; 465 struct inode *ip = VTOI(vp); 466 struct mount *mp = vp->v_mount; 467 struct ufsmount *ump = ip->i_ump; 468 void *data; 469 int error; 470 471 fstrans_start(mp, FSTRANS_LAZY); 472 if ((error = ufs_reclaim(vp)) != 0) { 473 fstrans_done(mp); 474 return (error); 475 } 476 if (ip->i_din.ffs1_din != NULL) { 477 if (ump->um_fstype == UFS1) 478 pool_put(&ffs_dinode1_pool, ip->i_din.ffs1_din); 479 else 480 pool_put(&ffs_dinode2_pool, ip->i_din.ffs2_din); 481 } 482 /* 483 * To interlock with ffs_sync(). 484 */ 485 genfs_node_destroy(vp); 486 mutex_enter(&vp->v_interlock); 487 data = vp->v_data; 488 vp->v_data = NULL; 489 mutex_exit(&vp->v_interlock); 490 491 /* 492 * XXX MFS ends up here, too, to free an inode. Should we create 493 * XXX a separate pool for MFS inodes? 494 */ 495 pool_put(&ffs_inode_pool, data); 496 fstrans_done(mp); 497 return (0); 498 } 499 500 #if 0 501 int 502 ffs_getpages(void *v) 503 { 504 struct vop_getpages_args /* { 505 struct vnode *a_vp; 506 voff_t a_offset; 507 struct vm_page **a_m; 508 int *a_count; 509 int a_centeridx; 510 vm_prot_t a_access_type; 511 int a_advice; 512 int a_flags; 513 } */ *ap = v; 514 struct vnode *vp = ap->a_vp; 515 struct inode *ip = VTOI(vp); 516 struct fs *fs = ip->i_fs; 517 518 /* 519 * don't allow a softdep write to create pages for only part of a block. 520 * the dependency tracking requires that all pages be in memory for 521 * a block involved in a dependency. 522 */ 523 524 if (ap->a_flags & PGO_OVERWRITE && 525 (blkoff(fs, ap->a_offset) != 0 || 526 blkoff(fs, *ap->a_count << PAGE_SHIFT) != 0) && 527 DOINGSOFTDEP(ap->a_vp)) { 528 if ((ap->a_flags & PGO_LOCKED) == 0) { 529 mutex_exit(&vp->v_interlock); 530 } 531 return EINVAL; 532 } 533 return genfs_getpages(v); 534 } 535 #endif 536 537 /* 538 * Return the last logical file offset that should be written for this file 539 * if we're doing a write that ends at "size". 540 */ 541 542 void 543 ffs_gop_size(struct vnode *vp, off_t size, off_t *eobp, int flags) 544 { 545 struct inode *ip = VTOI(vp); 546 struct fs *fs = ip->i_fs; 547 daddr_t olbn, nlbn; 548 549 olbn = lblkno(fs, ip->i_size); 550 nlbn = lblkno(fs, size); 551 if (nlbn < NDADDR && olbn <= nlbn) { 552 *eobp = fragroundup(fs, size); 553 } else { 554 *eobp = blkroundup(fs, size); 555 } 556 } 557 558 int 559 ffs_openextattr(void *v) 560 { 561 struct vop_openextattr_args /* { 562 struct vnode *a_vp; 563 kauth_cred_t a_cred; 564 struct proc *a_p; 565 } */ *ap = v; 566 struct inode *ip = VTOI(ap->a_vp); 567 struct fs *fs = ip->i_fs; 568 569 /* Not supported for UFS1 file systems. */ 570 if (fs->fs_magic == FS_UFS1_MAGIC) 571 return (EOPNOTSUPP); 572 573 /* XXX Not implemented for UFS2 file systems. */ 574 return (EOPNOTSUPP); 575 } 576 577 int 578 ffs_closeextattr(void *v) 579 { 580 struct vop_closeextattr_args /* { 581 struct vnode *a_vp; 582 int a_commit; 583 kauth_cred_t a_cred; 584 struct proc *a_p; 585 } */ *ap = v; 586 struct inode *ip = VTOI(ap->a_vp); 587 struct fs *fs = ip->i_fs; 588 589 /* Not supported for UFS1 file systems. */ 590 if (fs->fs_magic == FS_UFS1_MAGIC) 591 return (EOPNOTSUPP); 592 593 /* XXX Not implemented for UFS2 file systems. */ 594 return (EOPNOTSUPP); 595 } 596 597 int 598 ffs_getextattr(void *v) 599 { 600 struct vop_getextattr_args /* { 601 struct vnode *a_vp; 602 int a_attrnamespace; 603 const char *a_name; 604 struct uio *a_uio; 605 size_t *a_size; 606 kauth_cred_t a_cred; 607 struct proc *a_p; 608 } */ *ap = v; 609 struct vnode *vp = ap->a_vp; 610 struct inode *ip = VTOI(vp); 611 struct fs *fs = ip->i_fs; 612 613 if (fs->fs_magic == FS_UFS1_MAGIC) { 614 #ifdef UFS_EXTATTR 615 int error; 616 617 fstrans_start(vp->v_mount, FSTRANS_SHARED); 618 error = ufs_getextattr(ap); 619 fstrans_done(vp->v_mount); 620 return error; 621 #else 622 return (EOPNOTSUPP); 623 #endif 624 } 625 626 /* XXX Not implemented for UFS2 file systems. */ 627 return (EOPNOTSUPP); 628 } 629 630 int 631 ffs_setextattr(void *v) 632 { 633 struct vop_setextattr_args /* { 634 struct vnode *a_vp; 635 int a_attrnamespace; 636 const char *a_name; 637 struct uio *a_uio; 638 kauth_cred_t a_cred; 639 struct proc *a_p; 640 } */ *ap = v; 641 struct vnode *vp = ap->a_vp; 642 struct inode *ip = VTOI(vp); 643 struct fs *fs = ip->i_fs; 644 645 if (fs->fs_magic == FS_UFS1_MAGIC) { 646 #ifdef UFS_EXTATTR 647 int error; 648 649 fstrans_start(vp->v_mount, FSTRANS_SHARED); 650 error = ufs_setextattr(ap); 651 fstrans_done(vp->v_mount); 652 return error; 653 #else 654 return (EOPNOTSUPP); 655 #endif 656 } 657 658 /* XXX Not implemented for UFS2 file systems. */ 659 return (EOPNOTSUPP); 660 } 661 662 int 663 ffs_listextattr(void *v) 664 { 665 struct vop_listextattr_args /* { 666 struct vnode *a_vp; 667 int a_attrnamespace; 668 struct uio *a_uio; 669 size_t *a_size; 670 kauth_cred_t a_cred; 671 struct proc *a_p; 672 } */ *ap = v; 673 struct inode *ip = VTOI(ap->a_vp); 674 struct fs *fs = ip->i_fs; 675 676 /* Not supported for UFS1 file systems. */ 677 if (fs->fs_magic == FS_UFS1_MAGIC) 678 return (EOPNOTSUPP); 679 680 /* XXX Not implemented for UFS2 file systems. */ 681 return (EOPNOTSUPP); 682 } 683 684 int 685 ffs_deleteextattr(void *v) 686 { 687 struct vop_deleteextattr_args /* { 688 struct vnode *a_vp; 689 int a_attrnamespace; 690 kauth_cred_t a_cred; 691 struct proc *a_p; 692 } */ *ap = v; 693 struct vnode *vp = ap->a_vp; 694 struct inode *ip = VTOI(vp); 695 struct fs *fs = ip->i_fs; 696 697 if (fs->fs_magic == FS_UFS1_MAGIC) { 698 #ifdef UFS_EXTATTR 699 int error; 700 701 fstrans_start(vp->v_mount, FSTRANS_SHARED); 702 error = ufs_deleteextattr(ap); 703 fstrans_done(vp->v_mount); 704 return error; 705 #else 706 return (EOPNOTSUPP); 707 #endif 708 } 709 710 /* XXX Not implemented for UFS2 file systems. */ 711 return (EOPNOTSUPP); 712 } 713 714 /* 715 * Lock the node. 716 */ 717 int 718 ffs_lock(void *v) 719 { 720 struct vop_lock_args /* { 721 struct vnode *a_vp; 722 int a_flags; 723 } */ *ap = v; 724 struct vnode *vp = ap->a_vp; 725 struct mount *mp = vp->v_mount; 726 struct lock *lkp; 727 int flags = ap->a_flags; 728 int result; 729 730 /* 731 * Fake lock during file system suspension. 732 */ 733 if ((vp->v_type == VREG || vp->v_type == VDIR) && 734 fstrans_is_owner(mp) && 735 fstrans_getstate(mp) == FSTRANS_SUSPENDING) { 736 if ((flags & LK_INTERLOCK) != 0) 737 mutex_exit(&vp->v_interlock); 738 return 0; 739 } 740 741 KASSERT((flags & ~(LK_SHARED | LK_EXCLUSIVE | LK_SLEEPFAIL | 742 LK_INTERLOCK | LK_NOWAIT | LK_CANRECURSE)) == 0); 743 for (;;) { 744 if ((flags & LK_INTERLOCK) == 0) { 745 mutex_enter(&vp->v_interlock); 746 flags |= LK_INTERLOCK; 747 } 748 lkp = vp->v_vnlock; 749 result = lockmgr(lkp, flags, &vp->v_interlock); 750 if (lkp == vp->v_vnlock || result != 0) 751 return result; 752 /* 753 * Apparent success, except that the vnode mutated between 754 * snapshot file vnode and regular file vnode while this 755 * thread slept. The lock currently held is not the right 756 * lock. Release it, and try to get the new lock. 757 */ 758 (void) lockmgr(lkp, LK_RELEASE, NULL); 759 flags &= ~LK_INTERLOCK; 760 } 761 } 762 763 /* 764 * Unlock the node. 765 */ 766 int 767 ffs_unlock(void *v) 768 { 769 struct vop_unlock_args /* { 770 struct vnode *a_vp; 771 int a_flags; 772 } */ *ap = v; 773 struct vnode *vp = ap->a_vp; 774 struct mount *mp = vp->v_mount; 775 776 /* 777 * Fake unlock during file system suspension. 778 */ 779 if ((vp->v_type == VREG || vp->v_type == VDIR) && 780 fstrans_is_owner(mp) && 781 fstrans_getstate(mp) == FSTRANS_SUSPENDING) { 782 if ((ap->a_flags & LK_INTERLOCK) != 0) 783 mutex_exit(&vp->v_interlock); 784 return 0; 785 } 786 return (lockmgr(vp->v_vnlock, ap->a_flags | LK_RELEASE, 787 &vp->v_interlock)); 788 } 789 790 /* 791 * Return whether or not the node is locked. 792 */ 793 int 794 ffs_islocked(void *v) 795 { 796 struct vop_islocked_args /* { 797 struct vnode *a_vp; 798 } */ *ap = v; 799 struct vnode *vp = ap->a_vp; 800 801 return (lockstatus(vp->v_vnlock)); 802 } 803
Indexes created Wed Oct 22 13:09:56 GMT 2025