ffs_vnops.c revision 1.117
1 /* $NetBSD: ffs_vnops.c,v 1.117 2011/04/15 15:54:11 hannken Exp $ */ 2 3 /*- 4 * Copyright (c) 2008, 2009 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Wasabi Systems, Inc, and by Andrew Doran. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1982, 1986, 1989, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)ffs_vnops.c 8.15 (Berkeley) 5/14/95 61 */ 62 63 #include <sys/cdefs.h> 64 __KERNEL_RCSID(0, "$NetBSD: ffs_vnops.c,v 1.117 2011/04/15 15:54:11 hannken Exp $"); 65 66 #if defined(_KERNEL_OPT) 67 #include "opt_ffs.h" 68 #include "opt_wapbl.h" 69 #endif 70 71 #include <sys/param.h> 72 #include <sys/systm.h> 73 #include <sys/resourcevar.h> 74 #include <sys/kernel.h> 75 #include <sys/file.h> 76 #include <sys/stat.h> 77 #include <sys/buf.h> 78 #include <sys/event.h> 79 #include <sys/proc.h> 80 #include <sys/mount.h> 81 #include <sys/vnode.h> 82 #include <sys/pool.h> 83 #include <sys/signalvar.h> 84 #include <sys/kauth.h> 85 #include <sys/wapbl.h> 86 #include <sys/fstrans.h> 87 88 #include <miscfs/fifofs/fifo.h> 89 #include <miscfs/genfs/genfs.h> 90 #include <miscfs/specfs/specdev.h> 91 92 #include <ufs/ufs/inode.h> 93 #include <ufs/ufs/dir.h> 94 #include <ufs/ufs/ufs_extern.h> 95 #include <ufs/ufs/ufsmount.h> 96 #include <ufs/ufs/ufs_wapbl.h> 97 98 #include <ufs/ffs/fs.h> 99 #include <ufs/ffs/ffs_extern.h> 100 101 #include <uvm/uvm.h> 102 103 /* Global vfs data structures for ufs. */ 104 int (**ffs_vnodeop_p)(void *); 105 const struct vnodeopv_entry_desc ffs_vnodeop_entries[] = { 106 { &vop_default_desc, vn_default_error }, 107 { &vop_lookup_desc, ufs_lookup }, /* lookup */ 108 { &vop_create_desc, ufs_create }, /* create */ 109 { &vop_whiteout_desc, ufs_whiteout }, /* whiteout */ 110 { &vop_mknod_desc, ufs_mknod }, /* mknod */ 111 { &vop_open_desc, ufs_open }, /* open */ 112 { &vop_close_desc, ufs_close }, /* close */ 113 { &vop_access_desc, ufs_access }, /* access */ 114 { &vop_getattr_desc, ufs_getattr }, /* getattr */ 115 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 116 { &vop_read_desc, ffs_read }, /* read */ 117 { &vop_write_desc, ffs_write }, /* write */ 118 { &vop_ioctl_desc, ufs_ioctl }, /* ioctl */ 119 { &vop_fcntl_desc, ufs_fcntl }, /* fcntl */ 120 { &vop_poll_desc, ufs_poll }, /* poll */ 121 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ 122 { &vop_revoke_desc, ufs_revoke }, /* revoke */ 123 { &vop_mmap_desc, ufs_mmap }, /* mmap */ 124 { &vop_fsync_desc, ffs_fsync }, /* fsync */ 125 { &vop_seek_desc, ufs_seek }, /* seek */ 126 { &vop_remove_desc, ufs_remove }, /* remove */ 127 { &vop_link_desc, ufs_link }, /* link */ 128 { &vop_rename_desc, ufs_rename }, /* rename */ 129 { &vop_mkdir_desc, ufs_mkdir }, /* mkdir */ 130 { &vop_rmdir_desc, ufs_rmdir }, /* rmdir */ 131 { &vop_symlink_desc, ufs_symlink }, /* symlink */ 132 { &vop_readdir_desc, ufs_readdir }, /* readdir */ 133 { &vop_readlink_desc, ufs_readlink }, /* readlink */ 134 { &vop_abortop_desc, ufs_abortop }, /* abortop */ 135 { &vop_inactive_desc, ufs_inactive }, /* inactive */ 136 { &vop_reclaim_desc, ffs_reclaim }, /* reclaim */ 137 { &vop_lock_desc, ufs_lock }, /* lock */ 138 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 139 { &vop_bmap_desc, ufs_bmap }, /* bmap */ 140 { &vop_strategy_desc, ufs_strategy }, /* strategy */ 141 { &vop_print_desc, ufs_print }, /* print */ 142 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 143 { &vop_pathconf_desc, ufs_pathconf }, /* pathconf */ 144 { &vop_advlock_desc, ufs_advlock }, /* advlock */ 145 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 146 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 147 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 148 { &vop_openextattr_desc, ffs_openextattr }, /* openextattr */ 149 { &vop_closeextattr_desc, ffs_closeextattr }, /* closeextattr */ 150 { &vop_getextattr_desc, ffs_getextattr }, /* getextattr */ 151 { &vop_setextattr_desc, ffs_setextattr }, /* setextattr */ 152 { &vop_listextattr_desc, ffs_listextattr }, /* listextattr */ 153 { &vop_deleteextattr_desc, ffs_deleteextattr }, /* deleteextattr */ 154 { NULL, NULL } 155 }; 156 const struct vnodeopv_desc ffs_vnodeop_opv_desc = 157 { &ffs_vnodeop_p, ffs_vnodeop_entries }; 158 159 int (**ffs_specop_p)(void *); 160 const struct vnodeopv_entry_desc ffs_specop_entries[] = { 161 { &vop_default_desc, vn_default_error }, 162 { &vop_lookup_desc, spec_lookup }, /* lookup */ 163 { &vop_create_desc, spec_create }, /* create */ 164 { &vop_mknod_desc, spec_mknod }, /* mknod */ 165 { &vop_open_desc, spec_open }, /* open */ 166 { &vop_close_desc, ufsspec_close }, /* close */ 167 { &vop_access_desc, ufs_access }, /* access */ 168 { &vop_getattr_desc, ufs_getattr }, /* getattr */ 169 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 170 { &vop_read_desc, ufsspec_read }, /* read */ 171 { &vop_write_desc, ufsspec_write }, /* write */ 172 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 173 { &vop_fcntl_desc, ufs_fcntl }, /* fcntl */ 174 { &vop_poll_desc, spec_poll }, /* poll */ 175 { &vop_kqfilter_desc, spec_kqfilter }, /* kqfilter */ 176 { &vop_revoke_desc, spec_revoke }, /* revoke */ 177 { &vop_mmap_desc, spec_mmap }, /* mmap */ 178 { &vop_fsync_desc, ffs_fsync }, /* fsync */ 179 { &vop_seek_desc, spec_seek }, /* seek */ 180 { &vop_remove_desc, spec_remove }, /* remove */ 181 { &vop_link_desc, spec_link }, /* link */ 182 { &vop_rename_desc, spec_rename }, /* rename */ 183 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 184 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 185 { &vop_symlink_desc, spec_symlink }, /* symlink */ 186 { &vop_readdir_desc, spec_readdir }, /* readdir */ 187 { &vop_readlink_desc, spec_readlink }, /* readlink */ 188 { &vop_abortop_desc, spec_abortop }, /* abortop */ 189 { &vop_inactive_desc, ufs_inactive }, /* inactive */ 190 { &vop_reclaim_desc, ffs_reclaim }, /* reclaim */ 191 { &vop_lock_desc, ufs_lock }, /* lock */ 192 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 193 { &vop_bmap_desc, spec_bmap }, /* bmap */ 194 { &vop_strategy_desc, spec_strategy }, /* strategy */ 195 { &vop_print_desc, ufs_print }, /* print */ 196 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 197 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 198 { &vop_advlock_desc, spec_advlock }, /* advlock */ 199 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 200 { &vop_getpages_desc, spec_getpages }, /* getpages */ 201 { &vop_putpages_desc, spec_putpages }, /* putpages */ 202 { &vop_openextattr_desc, ffs_openextattr }, /* openextattr */ 203 { &vop_closeextattr_desc, ffs_closeextattr }, /* closeextattr */ 204 { &vop_getextattr_desc, ffs_getextattr }, /* getextattr */ 205 { &vop_setextattr_desc, ffs_setextattr }, /* setextattr */ 206 { &vop_listextattr_desc, ffs_listextattr }, /* listextattr */ 207 { &vop_deleteextattr_desc, ffs_deleteextattr }, /* deleteextattr */ 208 { NULL, NULL } 209 }; 210 const struct vnodeopv_desc ffs_specop_opv_desc = 211 { &ffs_specop_p, ffs_specop_entries }; 212 213 int (**ffs_fifoop_p)(void *); 214 const struct vnodeopv_entry_desc ffs_fifoop_entries[] = { 215 { &vop_default_desc, vn_default_error }, 216 { &vop_lookup_desc, vn_fifo_bypass }, /* lookup */ 217 { &vop_create_desc, vn_fifo_bypass }, /* create */ 218 { &vop_mknod_desc, vn_fifo_bypass }, /* mknod */ 219 { &vop_open_desc, vn_fifo_bypass }, /* open */ 220 { &vop_close_desc, ufsfifo_close }, /* close */ 221 { &vop_access_desc, ufs_access }, /* access */ 222 { &vop_getattr_desc, ufs_getattr }, /* getattr */ 223 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 224 { &vop_read_desc, ufsfifo_read }, /* read */ 225 { &vop_write_desc, ufsfifo_write }, /* write */ 226 { &vop_ioctl_desc, vn_fifo_bypass }, /* ioctl */ 227 { &vop_fcntl_desc, ufs_fcntl }, /* fcntl */ 228 { &vop_poll_desc, vn_fifo_bypass }, /* poll */ 229 { &vop_kqfilter_desc, vn_fifo_bypass }, /* kqfilter */ 230 { &vop_revoke_desc, vn_fifo_bypass }, /* revoke */ 231 { &vop_mmap_desc, vn_fifo_bypass }, /* mmap */ 232 { &vop_fsync_desc, ffs_fsync }, /* fsync */ 233 { &vop_seek_desc, vn_fifo_bypass }, /* seek */ 234 { &vop_remove_desc, vn_fifo_bypass }, /* remove */ 235 { &vop_link_desc, vn_fifo_bypass }, /* link */ 236 { &vop_rename_desc, vn_fifo_bypass }, /* rename */ 237 { &vop_mkdir_desc, vn_fifo_bypass }, /* mkdir */ 238 { &vop_rmdir_desc, vn_fifo_bypass }, /* rmdir */ 239 { &vop_symlink_desc, vn_fifo_bypass }, /* symlink */ 240 { &vop_readdir_desc, vn_fifo_bypass }, /* readdir */ 241 { &vop_readlink_desc, vn_fifo_bypass }, /* readlink */ 242 { &vop_abortop_desc, vn_fifo_bypass }, /* abortop */ 243 { &vop_inactive_desc, ufs_inactive }, /* inactive */ 244 { &vop_reclaim_desc, ffs_reclaim }, /* reclaim */ 245 { &vop_lock_desc, ufs_lock }, /* lock */ 246 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 247 { &vop_bmap_desc, vn_fifo_bypass }, /* bmap */ 248 { &vop_strategy_desc, vn_fifo_bypass }, /* strategy */ 249 { &vop_print_desc, ufs_print }, /* print */ 250 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 251 { &vop_pathconf_desc, vn_fifo_bypass }, /* pathconf */ 252 { &vop_advlock_desc, vn_fifo_bypass }, /* advlock */ 253 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 254 { &vop_putpages_desc, vn_fifo_bypass }, /* putpages */ 255 { &vop_openextattr_desc, ffs_openextattr }, /* openextattr */ 256 { &vop_closeextattr_desc, ffs_closeextattr }, /* closeextattr */ 257 { &vop_getextattr_desc, ffs_getextattr }, /* getextattr */ 258 { &vop_setextattr_desc, ffs_setextattr }, /* setextattr */ 259 { &vop_listextattr_desc, ffs_listextattr }, /* listextattr */ 260 { &vop_deleteextattr_desc, ffs_deleteextattr }, /* deleteextattr */ 261 { NULL, NULL } 262 }; 263 const struct vnodeopv_desc ffs_fifoop_opv_desc = 264 { &ffs_fifoop_p, ffs_fifoop_entries }; 265 266 #include <ufs/ufs/ufs_readwrite.c> 267 268 int 269 ffs_fsync(void *v) 270 { 271 struct vop_fsync_args /* { 272 struct vnode *a_vp; 273 kauth_cred_t a_cred; 274 int a_flags; 275 off_t a_offlo; 276 off_t a_offhi; 277 struct lwp *a_l; 278 } */ *ap = v; 279 struct buf *bp; 280 int num, error, i; 281 struct indir ia[NIADDR + 1]; 282 int bsize; 283 daddr_t blk_high; 284 struct vnode *vp; 285 struct mount *mp; 286 287 vp = ap->a_vp; 288 mp = vp->v_mount; 289 290 fstrans_start(mp, FSTRANS_LAZY); 291 if ((ap->a_offlo == 0 && ap->a_offhi == 0) || (vp->v_type != VREG)) { 292 error = ffs_full_fsync(vp, ap->a_flags); 293 goto out; 294 } 295 296 bsize = mp->mnt_stat.f_iosize; 297 blk_high = ap->a_offhi / bsize; 298 if (ap->a_offhi % bsize != 0) 299 blk_high++; 300 301 /* 302 * First, flush all pages in range. 303 */ 304 305 mutex_enter(&vp->v_interlock); 306 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 307 round_page(ap->a_offhi), PGO_CLEANIT | 308 ((ap->a_flags & FSYNC_WAIT) ? PGO_SYNCIO : 0)); 309 if (error) { 310 goto out; 311 } 312 313 #ifdef WAPBL 314 KASSERT(vp->v_type == VREG); 315 if (mp->mnt_wapbl) { 316 /* 317 * Don't bother writing out metadata if the syncer is 318 * making the request. We will let the sync vnode 319 * write it out in a single burst through a call to 320 * VFS_SYNC(). 321 */ 322 if ((ap->a_flags & (FSYNC_DATAONLY | FSYNC_LAZY)) != 0) { 323 fstrans_done(mp); 324 return 0; 325 } 326 error = 0; 327 if (vp->v_tag == VT_UFS && VTOI(vp)->i_flag & 328 (IN_ACCESS | IN_CHANGE | IN_UPDATE | IN_MODIFY | 329 IN_MODIFIED | IN_ACCESSED)) { 330 error = UFS_WAPBL_BEGIN(mp); 331 if (error) { 332 fstrans_done(mp); 333 return error; 334 } 335 error = ffs_update(vp, NULL, NULL, UPDATE_CLOSE | 336 ((ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0)); 337 UFS_WAPBL_END(mp); 338 } 339 if (error || (ap->a_flags & FSYNC_NOLOG) != 0) { 340 fstrans_done(mp); 341 return error; 342 } 343 error = wapbl_flush(mp->mnt_wapbl, 0); 344 fstrans_done(mp); 345 return error; 346 } 347 #endif /* WAPBL */ 348 349 /* 350 * Then, flush indirect blocks. 351 */ 352 353 if (blk_high >= NDADDR) { 354 error = ufs_getlbns(vp, blk_high, ia, &num); 355 if (error) 356 goto out; 357 358 mutex_enter(&bufcache_lock); 359 for (i = 0; i < num; i++) { 360 if ((bp = incore(vp, ia[i].in_lbn)) == NULL) 361 continue; 362 if ((bp->b_cflags & BC_BUSY) != 0 || 363 (bp->b_oflags & BO_DELWRI) == 0) 364 continue; 365 bp->b_cflags |= BC_BUSY | BC_VFLUSH; 366 mutex_exit(&bufcache_lock); 367 bawrite(bp); 368 mutex_enter(&bufcache_lock); 369 } 370 mutex_exit(&bufcache_lock); 371 } 372 373 if (ap->a_flags & FSYNC_WAIT) { 374 mutex_enter(&vp->v_interlock); 375 while (vp->v_numoutput > 0) 376 cv_wait(&vp->v_cv, &vp->v_interlock); 377 mutex_exit(&vp->v_interlock); 378 } 379 380 error = ffs_update(vp, NULL, NULL, UPDATE_CLOSE | 381 (((ap->a_flags & (FSYNC_WAIT | FSYNC_DATAONLY)) == FSYNC_WAIT) 382 ? UPDATE_WAIT : 0)); 383 384 if (error == 0 && ap->a_flags & FSYNC_CACHE) { 385 int l = 0; 386 VOP_IOCTL(VTOI(vp)->i_devvp, DIOCCACHESYNC, &l, FWRITE, 387 curlwp->l_cred); 388 } 389 390 out: 391 fstrans_done(mp); 392 return error; 393 } 394 395 /* 396 * Synch an open file. Called for VOP_FSYNC(). 397 */ 398 /* ARGSUSED */ 399 int 400 ffs_full_fsync(struct vnode *vp, int flags) 401 { 402 struct buf *bp, *nbp; 403 int error, passes, skipmeta, waitfor, i; 404 struct mount *mp; 405 406 KASSERT(VTOI(vp) != NULL); 407 KASSERT(vp->v_tag == VT_UFS); 408 409 error = 0; 410 411 mp = vp->v_mount; 412 if (vp->v_type == VBLK && vp->v_specmountpoint != NULL) { 413 mp = vp->v_specmountpoint; 414 } else { 415 mp = vp->v_mount; 416 } 417 418 /* 419 * Flush all dirty data associated with the vnode. 420 */ 421 if (vp->v_type == VREG || vp->v_type == VBLK) { 422 int pflags = PGO_ALLPAGES | PGO_CLEANIT; 423 424 if ((flags & FSYNC_WAIT)) 425 pflags |= PGO_SYNCIO; 426 if (vp->v_type == VREG && 427 fstrans_getstate(mp) == FSTRANS_SUSPENDING) 428 pflags |= PGO_FREE; 429 mutex_enter(&vp->v_interlock); 430 error = VOP_PUTPAGES(vp, 0, 0, pflags); 431 if (error) 432 return error; 433 } 434 435 #ifdef WAPBL 436 mp = wapbl_vptomp(vp); 437 if (mp && mp->mnt_wapbl) { 438 /* 439 * Don't bother writing out metadata if the syncer is 440 * making the request. We will let the sync vnode 441 * write it out in a single burst through a call to 442 * VFS_SYNC(). 443 */ 444 if ((flags & (FSYNC_DATAONLY | FSYNC_LAZY)) != 0) 445 return 0; 446 447 if ((VTOI(vp)->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE 448 | IN_MODIFY | IN_MODIFIED | IN_ACCESSED)) != 0) { 449 error = UFS_WAPBL_BEGIN(mp); 450 if (error) 451 return error; 452 error = ffs_update(vp, NULL, NULL, UPDATE_CLOSE | 453 ((flags & FSYNC_WAIT) ? UPDATE_WAIT : 0)); 454 UFS_WAPBL_END(mp); 455 } 456 if (error || (flags & FSYNC_NOLOG) != 0) 457 return error; 458 459 /* 460 * Don't flush the log if the vnode being flushed 461 * contains no dirty buffers that could be in the log. 462 */ 463 if (!LIST_EMPTY(&vp->v_dirtyblkhd)) { 464 error = wapbl_flush(mp->mnt_wapbl, 0); 465 if (error) 466 return error; 467 } 468 469 if ((flags & FSYNC_WAIT) != 0) { 470 mutex_enter(&vp->v_interlock); 471 while (vp->v_numoutput != 0) 472 cv_wait(&vp->v_cv, &vp->v_interlock); 473 mutex_exit(&vp->v_interlock); 474 } 475 476 return error; 477 } 478 #endif /* WAPBL */ 479 480 /* 481 * Write out metadata for non-logging file systems. XXX This block 482 * should be simplified now that softdep is gone. 483 */ 484 passes = NIADDR + 1; 485 skipmeta = 0; 486 if (flags & FSYNC_WAIT) 487 skipmeta = 1; 488 489 loop: 490 mutex_enter(&bufcache_lock); 491 LIST_FOREACH(bp, &vp->v_dirtyblkhd, b_vnbufs) { 492 bp->b_cflags &= ~BC_SCANNED; 493 } 494 for (bp = LIST_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { 495 nbp = LIST_NEXT(bp, b_vnbufs); 496 if (bp->b_cflags & (BC_BUSY | BC_SCANNED)) 497 continue; 498 if ((bp->b_oflags & BO_DELWRI) == 0) 499 panic("ffs_fsync: not dirty"); 500 if (skipmeta && bp->b_lblkno < 0) 501 continue; 502 bp->b_cflags |= BC_BUSY | BC_VFLUSH | BC_SCANNED; 503 mutex_exit(&bufcache_lock); 504 /* 505 * On our final pass through, do all I/O synchronously 506 * so that we can find out if our flush is failing 507 * because of write errors. 508 */ 509 if (passes > 0 || !(flags & FSYNC_WAIT)) 510 (void) bawrite(bp); 511 else if ((error = bwrite(bp)) != 0) 512 return (error); 513 /* 514 * Since we unlocked during the I/O, we need 515 * to start from a known point. 516 */ 517 mutex_enter(&bufcache_lock); 518 nbp = LIST_FIRST(&vp->v_dirtyblkhd); 519 } 520 mutex_exit(&bufcache_lock); 521 if (skipmeta) { 522 skipmeta = 0; 523 goto loop; 524 } 525 526 if ((flags & FSYNC_WAIT) != 0) { 527 mutex_enter(&vp->v_interlock); 528 while (vp->v_numoutput) { 529 cv_wait(&vp->v_cv, &vp->v_interlock); 530 } 531 mutex_exit(&vp->v_interlock); 532 533 /* 534 * Ensure that any filesystem metadata associated 535 * with the vnode has been written. 536 */ 537 if (!LIST_EMPTY(&vp->v_dirtyblkhd)) { 538 /* 539 * Block devices associated with filesystems may 540 * have new I/O requests posted for them even if 541 * the vnode is locked, so no amount of trying will 542 * get them clean. Thus we give block devices a 543 * good effort, then just give up. For all other file 544 * types, go around and try again until it is clean. 545 */ 546 if (passes > 0) { 547 passes--; 548 goto loop; 549 } 550 #ifdef DIAGNOSTIC 551 if (vp->v_type != VBLK) 552 vprint("ffs_fsync: dirty", vp); 553 #endif 554 } 555 } 556 557 waitfor = (flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 558 error = ffs_update(vp, NULL, NULL, UPDATE_CLOSE | waitfor); 559 560 if (error == 0 && (flags & FSYNC_CACHE) != 0) { 561 (void)VOP_IOCTL(VTOI(vp)->i_devvp, DIOCCACHESYNC, &i, FWRITE, 562 kauth_cred_get()); 563 } 564 565 return error; 566 } 567 568 /* 569 * Reclaim an inode so that it can be used for other purposes. 570 */ 571 int 572 ffs_reclaim(void *v) 573 { 574 struct vop_reclaim_args /* { 575 struct vnode *a_vp; 576 struct lwp *a_l; 577 } */ *ap = v; 578 struct vnode *vp = ap->a_vp; 579 struct inode *ip = VTOI(vp); 580 struct mount *mp = vp->v_mount; 581 struct ufsmount *ump = ip->i_ump; 582 void *data; 583 int error; 584 585 fstrans_start(mp, FSTRANS_LAZY); 586 /* 587 * The inode must be freed and updated before being removed 588 * from its hash chain. Other threads trying to gain a hold 589 * on the inode will be stalled because it is locked (VI_XLOCK). 590 */ 591 error = UFS_WAPBL_BEGIN(mp); 592 if (error) { 593 fstrans_done(mp); 594 return error; 595 } 596 if (ip->i_nlink <= 0 && ip->i_omode != 0 && 597 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) 598 ffs_vfree(vp, ip->i_number, ip->i_omode); 599 UFS_WAPBL_END(mp); 600 if ((error = ufs_reclaim(vp)) != 0) { 601 fstrans_done(mp); 602 return (error); 603 } 604 if (ip->i_din.ffs1_din != NULL) { 605 if (ump->um_fstype == UFS1) 606 pool_cache_put(ffs_dinode1_cache, ip->i_din.ffs1_din); 607 else 608 pool_cache_put(ffs_dinode2_cache, ip->i_din.ffs2_din); 609 } 610 /* 611 * To interlock with ffs_sync(). 612 */ 613 genfs_node_destroy(vp); 614 mutex_enter(&vp->v_interlock); 615 data = vp->v_data; 616 vp->v_data = NULL; 617 mutex_exit(&vp->v_interlock); 618 619 /* 620 * XXX MFS ends up here, too, to free an inode. Should we create 621 * XXX a separate pool for MFS inodes? 622 */ 623 pool_cache_put(ffs_inode_cache, data); 624 fstrans_done(mp); 625 return (0); 626 } 627 628 /* 629 * Return the last logical file offset that should be written for this file 630 * if we're doing a write that ends at "size". 631 */ 632 633 void 634 ffs_gop_size(struct vnode *vp, off_t size, off_t *eobp, int flags) 635 { 636 struct inode *ip = VTOI(vp); 637 struct fs *fs = ip->i_fs; 638 daddr_t olbn, nlbn; 639 640 olbn = lblkno(fs, ip->i_size); 641 nlbn = lblkno(fs, size); 642 if (nlbn < NDADDR && olbn <= nlbn) { 643 *eobp = fragroundup(fs, size); 644 } else { 645 *eobp = blkroundup(fs, size); 646 } 647 } 648 649 int 650 ffs_openextattr(void *v) 651 { 652 struct vop_openextattr_args /* { 653 struct vnode *a_vp; 654 kauth_cred_t a_cred; 655 struct proc *a_p; 656 } */ *ap = v; 657 struct inode *ip = VTOI(ap->a_vp); 658 struct fs *fs = ip->i_fs; 659 660 /* Not supported for UFS1 file systems. */ 661 if (fs->fs_magic == FS_UFS1_MAGIC) 662 return (EOPNOTSUPP); 663 664 /* XXX Not implemented for UFS2 file systems. */ 665 return (EOPNOTSUPP); 666 } 667 668 int 669 ffs_closeextattr(void *v) 670 { 671 struct vop_closeextattr_args /* { 672 struct vnode *a_vp; 673 int a_commit; 674 kauth_cred_t a_cred; 675 struct proc *a_p; 676 } */ *ap = v; 677 struct inode *ip = VTOI(ap->a_vp); 678 struct fs *fs = ip->i_fs; 679 680 /* Not supported for UFS1 file systems. */ 681 if (fs->fs_magic == FS_UFS1_MAGIC) 682 return (EOPNOTSUPP); 683 684 /* XXX Not implemented for UFS2 file systems. */ 685 return (EOPNOTSUPP); 686 } 687 688 int 689 ffs_getextattr(void *v) 690 { 691 struct vop_getextattr_args /* { 692 struct vnode *a_vp; 693 int a_attrnamespace; 694 const char *a_name; 695 struct uio *a_uio; 696 size_t *a_size; 697 kauth_cred_t a_cred; 698 struct proc *a_p; 699 } */ *ap = v; 700 struct vnode *vp = ap->a_vp; 701 struct inode *ip = VTOI(vp); 702 struct fs *fs = ip->i_fs; 703 704 if (fs->fs_magic == FS_UFS1_MAGIC) { 705 #ifdef UFS_EXTATTR 706 int error; 707 708 fstrans_start(vp->v_mount, FSTRANS_SHARED); 709 error = ufs_getextattr(ap); 710 fstrans_done(vp->v_mount); 711 return error; 712 #else 713 return (EOPNOTSUPP); 714 #endif 715 } 716 717 /* XXX Not implemented for UFS2 file systems. */ 718 return (EOPNOTSUPP); 719 } 720 721 int 722 ffs_setextattr(void *v) 723 { 724 struct vop_setextattr_args /* { 725 struct vnode *a_vp; 726 int a_attrnamespace; 727 const char *a_name; 728 struct uio *a_uio; 729 kauth_cred_t a_cred; 730 struct proc *a_p; 731 } */ *ap = v; 732 struct vnode *vp = ap->a_vp; 733 struct inode *ip = VTOI(vp); 734 struct fs *fs = ip->i_fs; 735 736 if (fs->fs_magic == FS_UFS1_MAGIC) { 737 #ifdef UFS_EXTATTR 738 int error; 739 740 fstrans_start(vp->v_mount, FSTRANS_SHARED); 741 error = ufs_setextattr(ap); 742 fstrans_done(vp->v_mount); 743 return error; 744 #else 745 return (EOPNOTSUPP); 746 #endif 747 } 748 749 /* XXX Not implemented for UFS2 file systems. */ 750 return (EOPNOTSUPP); 751 } 752 753 int 754 ffs_listextattr(void *v) 755 { 756 struct vop_listextattr_args /* { 757 struct vnode *a_vp; 758 int a_attrnamespace; 759 struct uio *a_uio; 760 size_t *a_size; 761 kauth_cred_t a_cred; 762 struct proc *a_p; 763 } */ *ap = v; 764 struct inode *ip = VTOI(ap->a_vp); 765 struct fs *fs = ip->i_fs; 766 767 /* Not supported for UFS1 file systems. */ 768 if (fs->fs_magic == FS_UFS1_MAGIC) 769 return (EOPNOTSUPP); 770 771 /* XXX Not implemented for UFS2 file systems. */ 772 return (EOPNOTSUPP); 773 } 774 775 int 776 ffs_deleteextattr(void *v) 777 { 778 struct vop_deleteextattr_args /* { 779 struct vnode *a_vp; 780 int a_attrnamespace; 781 kauth_cred_t a_cred; 782 struct proc *a_p; 783 } */ *ap = v; 784 struct vnode *vp = ap->a_vp; 785 struct inode *ip = VTOI(vp); 786 struct fs *fs = ip->i_fs; 787 788 if (fs->fs_magic == FS_UFS1_MAGIC) { 789 #ifdef UFS_EXTATTR 790 int error; 791 792 fstrans_start(vp->v_mount, FSTRANS_SHARED); 793 error = ufs_deleteextattr(ap); 794 fstrans_done(vp->v_mount); 795 return error; 796 #else 797 return (EOPNOTSUPP); 798 #endif 799 } 800 801 /* XXX Not implemented for UFS2 file systems. */ 802 return (EOPNOTSUPP); 803 } 804
Indexes created Wed Oct 01 15:09:59 GMT 2025