ffs_vnops.c revision 1.104.4.8
1 /* $NetBSD: ffs_vnops.c,v 1.104.4.8 2011/07/17 15:36:04 riz 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 1.104.4.8 2011/07/17 15:36:04 riz 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, ffs_lock }, /* lock */ 138 { &vop_unlock_desc, ffs_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, ffs_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, ffs_lock }, /* lock */ 192 { &vop_unlock_desc, ffs_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, ffs_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, fifo_lookup }, /* lookup */ 217 { &vop_create_desc, fifo_create }, /* create */ 218 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 219 { &vop_open_desc, fifo_open }, /* 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, fifo_ioctl }, /* ioctl */ 227 { &vop_fcntl_desc, ufs_fcntl }, /* fcntl */ 228 { &vop_poll_desc, fifo_poll }, /* poll */ 229 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 230 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 231 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 232 { &vop_fsync_desc, ffs_fsync }, /* fsync */ 233 { &vop_seek_desc, fifo_seek }, /* seek */ 234 { &vop_remove_desc, fifo_remove }, /* remove */ 235 { &vop_link_desc, fifo_link }, /* link */ 236 { &vop_rename_desc, fifo_rename }, /* rename */ 237 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 238 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 239 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 240 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 241 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 242 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 243 { &vop_inactive_desc, ufs_inactive }, /* inactive */ 244 { &vop_reclaim_desc, ffs_reclaim }, /* reclaim */ 245 { &vop_lock_desc, ffs_lock }, /* lock */ 246 { &vop_unlock_desc, ffs_unlock }, /* unlock */ 247 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 248 { &vop_strategy_desc, fifo_strategy }, /* strategy */ 249 { &vop_print_desc, ufs_print }, /* print */ 250 { &vop_islocked_desc, ffs_islocked }, /* islocked */ 251 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 252 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 253 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 254 { &vop_putpages_desc, fifo_putpages }, /* 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 #ifdef WAPBL 286 struct mount *mp; 287 #endif 288 289 vp = ap->a_vp; 290 291 fstrans_start(vp->v_mount, FSTRANS_LAZY); 292 /* 293 * XXX no easy way to sync a range in a file with softdep. 294 */ 295 if ((ap->a_offlo == 0 && ap->a_offhi == 0) || DOINGSOFTDEP(vp) || 296 (vp->v_type != VREG)) { 297 int flags = ap->a_flags; 298 error = ffs_full_fsync(vp, flags); 299 goto out; 300 } 301 302 bsize = vp->v_mount->mnt_stat.f_iosize; 303 blk_high = ap->a_offhi / bsize; 304 if (ap->a_offhi % bsize != 0) 305 blk_high++; 306 307 /* 308 * First, flush all pages in range. 309 */ 310 311 mutex_enter(&vp->v_interlock); 312 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 313 round_page(ap->a_offhi), PGO_CLEANIT | 314 ((ap->a_flags & FSYNC_WAIT) ? PGO_SYNCIO : 0)); 315 if (error) { 316 goto out; 317 } 318 319 #ifdef WAPBL 320 mp = wapbl_vptomp(vp); 321 if (mp->mnt_wapbl) { 322 /* 323 * Don't bother writing out metadata if the syncer is 324 * making the request. We will let the sync vnode 325 * write it out in a single burst through a call to 326 * VFS_SYNC(). 327 */ 328 if ((ap->a_flags & (FSYNC_DATAONLY | FSYNC_LAZY)) != 0) { 329 fstrans_done(vp->v_mount); 330 return 0; 331 } 332 error = 0; 333 if (vp->v_tag == VT_UFS && VTOI(vp)->i_flag & 334 (IN_ACCESS | IN_CHANGE | IN_UPDATE | IN_MODIFY | 335 IN_MODIFIED | IN_ACCESSED)) { 336 error = UFS_WAPBL_BEGIN(mp); 337 if (error) { 338 fstrans_done(vp->v_mount); 339 return error; 340 } 341 error = ffs_update(vp, NULL, NULL, UPDATE_CLOSE | 342 ((ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0)); 343 UFS_WAPBL_END(mp); 344 } 345 if (error || (ap->a_flags & FSYNC_NOLOG) != 0) { 346 fstrans_done(vp->v_mount); 347 return error; 348 } 349 error = wapbl_flush(mp->mnt_wapbl, 0); 350 fstrans_done(vp->v_mount); 351 return error; 352 } 353 #endif /* WAPBL */ 354 355 /* 356 * Then, flush indirect blocks. 357 */ 358 359 if (blk_high >= NDADDR) { 360 error = ufs_getlbns(vp, blk_high, ia, &num); 361 if (error) 362 goto out; 363 364 mutex_enter(&bufcache_lock); 365 for (i = 0; i < num; i++) { 366 if ((bp = incore(vp, ia[i].in_lbn)) == NULL) 367 continue; 368 if ((bp->b_cflags & BC_BUSY) != 0 || 369 (bp->b_oflags & BO_DELWRI) == 0) 370 continue; 371 bp->b_cflags |= BC_BUSY | BC_VFLUSH; 372 mutex_exit(&bufcache_lock); 373 bawrite(bp); 374 mutex_enter(&bufcache_lock); 375 } 376 mutex_exit(&bufcache_lock); 377 } 378 379 if (ap->a_flags & FSYNC_WAIT) { 380 mutex_enter(&vp->v_interlock); 381 while (vp->v_numoutput > 0) 382 cv_wait(&vp->v_cv, &vp->v_interlock); 383 mutex_exit(&vp->v_interlock); 384 } 385 386 error = ffs_update(vp, NULL, NULL, UPDATE_CLOSE | 387 (((ap->a_flags & (FSYNC_WAIT | FSYNC_DATAONLY)) == FSYNC_WAIT) 388 ? UPDATE_WAIT : 0)); 389 390 if (error == 0 && ap->a_flags & FSYNC_CACHE) { 391 int l = 0; 392 VOP_IOCTL(VTOI(vp)->i_devvp, DIOCCACHESYNC, &l, FWRITE, 393 curlwp->l_cred); 394 } 395 396 out: 397 fstrans_done(vp->v_mount); 398 return error; 399 } 400 401 /* 402 * Synch an open file. Called for VOP_FSYNC(). 403 */ 404 /* ARGSUSED */ 405 int 406 ffs_full_fsync(struct vnode *vp, int flags) 407 { 408 struct buf *bp, *nbp; 409 int error, passes, skipmeta, inodedeps_only, waitfor, i; 410 struct mount *mp; 411 412 KASSERT(VTOI(vp) != NULL); 413 KASSERT(vp->v_tag == VT_UFS); 414 415 error = 0; 416 417 mp = vp->v_mount; 418 if (vp->v_type == VBLK && vp->v_specmountpoint != NULL) { 419 mp = vp->v_specmountpoint; 420 if ((mp->mnt_flag & MNT_SOFTDEP) != 0) 421 softdep_fsync_mountdev(vp); 422 } else { 423 mp = vp->v_mount; 424 } 425 426 mutex_enter(&vp->v_interlock); 427 428 inodedeps_only = DOINGSOFTDEP(vp) && (flags & FSYNC_RECLAIM) 429 && UVM_OBJ_IS_CLEAN(&vp->v_uobj) && LIST_EMPTY(&vp->v_dirtyblkhd); 430 431 /* 432 * Flush all dirty data associated with the vnode. 433 */ 434 if (vp->v_type == VREG || vp->v_type == VBLK) { 435 int pflags = PGO_ALLPAGES | PGO_CLEANIT; 436 437 if ((flags & FSYNC_WAIT)) 438 pflags |= PGO_SYNCIO; 439 if (vp->v_type == VREG && 440 fstrans_getstate(mp) == FSTRANS_SUSPENDING) 441 pflags |= PGO_FREE; 442 error = VOP_PUTPAGES(vp, 0, 0, pflags); 443 if (error) 444 return error; 445 } else { 446 mutex_exit(&vp->v_interlock); 447 } 448 449 #ifdef WAPBL 450 if (mp && mp->mnt_wapbl) { 451 /* 452 * Don't bother writing out metadata if the syncer is 453 * making the request. We will let the sync vnode 454 * write it out in a single burst through a call to 455 * VFS_SYNC(). 456 */ 457 if ((flags & (FSYNC_DATAONLY | FSYNC_LAZY)) != 0) 458 return 0; 459 460 if ((VTOI(vp)->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE 461 | IN_MODIFY | IN_MODIFIED | IN_ACCESSED)) != 0) { 462 error = UFS_WAPBL_BEGIN(mp); 463 if (error) 464 return error; 465 error = ffs_update(vp, NULL, NULL, UPDATE_CLOSE | 466 ((flags & FSYNC_WAIT) ? UPDATE_WAIT : 0)); 467 UFS_WAPBL_END(mp); 468 } 469 if (error || (flags & FSYNC_NOLOG) != 0) 470 return error; 471 472 /* 473 * Don't flush the log if the vnode being flushed 474 * contains no dirty buffers that could be in the log. 475 */ 476 if (!LIST_EMPTY(&vp->v_dirtyblkhd)) { 477 error = wapbl_flush(mp->mnt_wapbl, 0); 478 if (error) 479 return error; 480 } 481 482 if ((flags & FSYNC_WAIT) != 0) { 483 mutex_enter(&vp->v_interlock); 484 while (vp->v_numoutput != 0) 485 cv_wait(&vp->v_cv, &vp->v_interlock); 486 mutex_exit(&vp->v_interlock); 487 } 488 489 return error; 490 } 491 #endif /* WAPBL */ 492 493 /* 494 * Write out metadata for non-logging file systems. This block can 495 * be simplified once softdep goes. 496 */ 497 passes = NIADDR + 1; 498 skipmeta = 0; 499 if (flags & FSYNC_WAIT) 500 skipmeta = 1; 501 502 loop: 503 mutex_enter(&bufcache_lock); 504 LIST_FOREACH(bp, &vp->v_dirtyblkhd, b_vnbufs) { 505 bp->b_cflags &= ~BC_SCANNED; 506 } 507 for (bp = LIST_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { 508 nbp = LIST_NEXT(bp, b_vnbufs); 509 if (bp->b_cflags & (BC_BUSY | BC_SCANNED)) 510 continue; 511 if ((bp->b_oflags & BO_DELWRI) == 0) 512 panic("ffs_fsync: not dirty"); 513 if (skipmeta && bp->b_lblkno < 0) 514 continue; 515 bp->b_cflags |= BC_BUSY | BC_VFLUSH | BC_SCANNED; 516 mutex_exit(&bufcache_lock); 517 /* 518 * On our final pass through, do all I/O synchronously 519 * so that we can find out if our flush is failing 520 * because of write errors. 521 */ 522 if (passes > 0 || !(flags & FSYNC_WAIT)) 523 (void) bawrite(bp); 524 else if ((error = bwrite(bp)) != 0) 525 return (error); 526 /* 527 * Since we unlocked during the I/O, we need 528 * to start from a known point. 529 */ 530 mutex_enter(&bufcache_lock); 531 nbp = LIST_FIRST(&vp->v_dirtyblkhd); 532 } 533 mutex_exit(&bufcache_lock); 534 if (skipmeta) { 535 skipmeta = 0; 536 goto loop; 537 } 538 539 if ((flags & FSYNC_WAIT) != 0) { 540 mutex_enter(&vp->v_interlock); 541 while (vp->v_numoutput) { 542 cv_wait(&vp->v_cv, &vp->v_interlock); 543 } 544 mutex_exit(&vp->v_interlock); 545 546 /* 547 * Ensure that any filesystem metadata associated 548 * with the vnode has been written. 549 */ 550 if ((error = softdep_sync_metadata(vp)) != 0) 551 return (error); 552 553 if (!LIST_EMPTY(&vp->v_dirtyblkhd)) { 554 /* 555 * Block devices associated with filesystems may 556 * have new I/O requests posted for them even if 557 * the vnode is locked, so no amount of trying will 558 * get them clean. Thus we give block devices a 559 * good effort, then just give up. For all other file 560 * types, go around and try again until it is clean. 561 */ 562 if (passes > 0) { 563 passes--; 564 goto loop; 565 } 566 #ifdef DIAGNOSTIC 567 if (vp->v_type != VBLK) 568 vprint("ffs_fsync: dirty", vp); 569 #endif 570 } 571 } 572 573 if (inodedeps_only) 574 waitfor = 0; 575 else 576 waitfor = (flags & FSYNC_WAIT) != 0 ? UPDATE_WAIT : 0; 577 error = ffs_update(vp, NULL, NULL, UPDATE_CLOSE | waitfor); 578 579 if (error == 0 && (flags & FSYNC_CACHE) != 0) { 580 (void)VOP_IOCTL(VTOI(vp)->i_devvp, DIOCCACHESYNC, &i, FWRITE, 581 kauth_cred_get()); 582 } 583 584 return error; 585 } 586 587 /* 588 * Reclaim an inode so that it can be used for other purposes. 589 */ 590 int 591 ffs_reclaim(void *v) 592 { 593 struct vop_reclaim_args /* { 594 struct vnode *a_vp; 595 struct lwp *a_l; 596 } */ *ap = v; 597 struct vnode *vp = ap->a_vp; 598 struct inode *ip = VTOI(vp); 599 struct mount *mp = vp->v_mount; 600 struct ufsmount *ump = ip->i_ump; 601 void *data; 602 int error; 603 604 fstrans_start(mp, FSTRANS_LAZY); 605 if ((error = ufs_reclaim(vp)) != 0) { 606 fstrans_done(mp); 607 return (error); 608 } 609 if (ip->i_din.ffs1_din != NULL) { 610 if (ump->um_fstype == UFS1) 611 pool_cache_put(ffs_dinode1_cache, ip->i_din.ffs1_din); 612 else 613 pool_cache_put(ffs_dinode2_cache, ip->i_din.ffs2_din); 614 } 615 /* 616 * To interlock with ffs_sync(). 617 */ 618 genfs_node_destroy(vp); 619 mutex_enter(&vp->v_interlock); 620 data = vp->v_data; 621 vp->v_data = NULL; 622 mutex_exit(&vp->v_interlock); 623 624 /* 625 * XXX MFS ends up here, too, to free an inode. Should we create 626 * XXX a separate pool for MFS inodes? 627 */ 628 pool_cache_put(ffs_inode_cache, data); 629 fstrans_done(mp); 630 return (0); 631 } 632 633 #if 0 634 int 635 ffs_getpages(void *v) 636 { 637 struct vop_getpages_args /* { 638 struct vnode *a_vp; 639 voff_t a_offset; 640 struct vm_page **a_m; 641 int *a_count; 642 int a_centeridx; 643 vm_prot_t a_access_type; 644 int a_advice; 645 int a_flags; 646 } */ *ap = v; 647 struct vnode *vp = ap->a_vp; 648 struct inode *ip = VTOI(vp); 649 struct fs *fs = ip->i_fs; 650 651 /* 652 * don't allow a softdep write to create pages for only part of a block. 653 * the dependency tracking requires that all pages be in memory for 654 * a block involved in a dependency. 655 */ 656 657 if (ap->a_flags & PGO_OVERWRITE && 658 (blkoff(fs, ap->a_offset) != 0 || 659 blkoff(fs, *ap->a_count << PAGE_SHIFT) != 0) && 660 DOINGSOFTDEP(ap->a_vp)) { 661 if ((ap->a_flags & PGO_LOCKED) == 0) { 662 mutex_exit(&vp->v_interlock); 663 } 664 return EINVAL; 665 } 666 return genfs_getpages(v); 667 } 668 #endif 669 670 /* 671 * Return the last logical file offset that should be written for this file 672 * if we're doing a write that ends at "size". 673 */ 674 675 void 676 ffs_gop_size(struct vnode *vp, off_t size, off_t *eobp, int flags) 677 { 678 struct inode *ip = VTOI(vp); 679 struct fs *fs = ip->i_fs; 680 daddr_t olbn, nlbn; 681 682 olbn = lblkno(fs, ip->i_size); 683 nlbn = lblkno(fs, size); 684 if (nlbn < NDADDR && olbn <= nlbn) { 685 *eobp = fragroundup(fs, size); 686 } else { 687 *eobp = blkroundup(fs, size); 688 } 689 } 690 691 int 692 ffs_openextattr(void *v) 693 { 694 struct vop_openextattr_args /* { 695 struct vnode *a_vp; 696 kauth_cred_t a_cred; 697 struct proc *a_p; 698 } */ *ap = v; 699 struct inode *ip = VTOI(ap->a_vp); 700 struct fs *fs = ip->i_fs; 701 702 /* Not supported for UFS1 file systems. */ 703 if (fs->fs_magic == FS_UFS1_MAGIC) 704 return (EOPNOTSUPP); 705 706 /* XXX Not implemented for UFS2 file systems. */ 707 return (EOPNOTSUPP); 708 } 709 710 int 711 ffs_closeextattr(void *v) 712 { 713 struct vop_closeextattr_args /* { 714 struct vnode *a_vp; 715 int a_commit; 716 kauth_cred_t a_cred; 717 struct proc *a_p; 718 } */ *ap = v; 719 struct inode *ip = VTOI(ap->a_vp); 720 struct fs *fs = ip->i_fs; 721 722 /* Not supported for UFS1 file systems. */ 723 if (fs->fs_magic == FS_UFS1_MAGIC) 724 return (EOPNOTSUPP); 725 726 /* XXX Not implemented for UFS2 file systems. */ 727 return (EOPNOTSUPP); 728 } 729 730 int 731 ffs_getextattr(void *v) 732 { 733 struct vop_getextattr_args /* { 734 struct vnode *a_vp; 735 int a_attrnamespace; 736 const char *a_name; 737 struct uio *a_uio; 738 size_t *a_size; 739 kauth_cred_t a_cred; 740 struct proc *a_p; 741 } */ *ap = v; 742 struct vnode *vp = ap->a_vp; 743 struct inode *ip = VTOI(vp); 744 struct fs *fs = ip->i_fs; 745 746 if (fs->fs_magic == FS_UFS1_MAGIC) { 747 #ifdef UFS_EXTATTR 748 int error; 749 750 fstrans_start(vp->v_mount, FSTRANS_SHARED); 751 error = ufs_getextattr(ap); 752 fstrans_done(vp->v_mount); 753 return error; 754 #else 755 return (EOPNOTSUPP); 756 #endif 757 } 758 759 /* XXX Not implemented for UFS2 file systems. */ 760 return (EOPNOTSUPP); 761 } 762 763 int 764 ffs_setextattr(void *v) 765 { 766 struct vop_setextattr_args /* { 767 struct vnode *a_vp; 768 int a_attrnamespace; 769 const char *a_name; 770 struct uio *a_uio; 771 kauth_cred_t a_cred; 772 struct proc *a_p; 773 } */ *ap = v; 774 struct vnode *vp = ap->a_vp; 775 struct inode *ip = VTOI(vp); 776 struct fs *fs = ip->i_fs; 777 778 if (fs->fs_magic == FS_UFS1_MAGIC) { 779 #ifdef UFS_EXTATTR 780 int error; 781 782 fstrans_start(vp->v_mount, FSTRANS_SHARED); 783 error = ufs_setextattr(ap); 784 fstrans_done(vp->v_mount); 785 return error; 786 #else 787 return (EOPNOTSUPP); 788 #endif 789 } 790 791 /* XXX Not implemented for UFS2 file systems. */ 792 return (EOPNOTSUPP); 793 } 794 795 int 796 ffs_listextattr(void *v) 797 { 798 struct vop_listextattr_args /* { 799 struct vnode *a_vp; 800 int a_attrnamespace; 801 struct uio *a_uio; 802 size_t *a_size; 803 kauth_cred_t a_cred; 804 struct proc *a_p; 805 } */ *ap = v; 806 struct inode *ip = VTOI(ap->a_vp); 807 struct fs *fs = ip->i_fs; 808 809 if (fs->fs_magic == FS_UFS1_MAGIC) { 810 #ifdef UFS_EXTATTR 811 struct vnode *vp = ap->a_vp; 812 int error; 813 814 fstrans_start(vp->v_mount, FSTRANS_SHARED); 815 error = ufs_listextattr(ap); 816 fstrans_done(vp->v_mount); 817 return error; 818 #else 819 return (EOPNOTSUPP); 820 #endif 821 } 822 823 /* XXX Not implemented for UFS2 file systems. */ 824 return (EOPNOTSUPP); 825 } 826 827 int 828 ffs_deleteextattr(void *v) 829 { 830 struct vop_deleteextattr_args /* { 831 struct vnode *a_vp; 832 int a_attrnamespace; 833 kauth_cred_t a_cred; 834 struct proc *a_p; 835 } */ *ap = v; 836 struct vnode *vp = ap->a_vp; 837 struct inode *ip = VTOI(vp); 838 struct fs *fs = ip->i_fs; 839 840 if (fs->fs_magic == FS_UFS1_MAGIC) { 841 #ifdef UFS_EXTATTR 842 int error; 843 844 fstrans_start(vp->v_mount, FSTRANS_SHARED); 845 error = ufs_deleteextattr(ap); 846 fstrans_done(vp->v_mount); 847 return error; 848 #else 849 return (EOPNOTSUPP); 850 #endif 851 } 852 853 /* XXX Not implemented for UFS2 file systems. */ 854 return (EOPNOTSUPP); 855 } 856 857 /* 858 * Lock the node. 859 */ 860 int 861 ffs_lock(void *v) 862 { 863 struct vop_lock_args /* { 864 struct vnode *a_vp; 865 int a_flags; 866 } */ *ap = v; 867 struct vnode *vp = ap->a_vp; 868 struct mount *mp = vp->v_mount; 869 int flags = ap->a_flags; 870 871 if ((flags & LK_INTERLOCK) != 0) { 872 mutex_exit(&vp->v_interlock); 873 flags &= ~LK_INTERLOCK; 874 } 875 876 /* 877 * Fake lock during file system suspension. 878 */ 879 if ((vp->v_type == VREG || vp->v_type == VDIR) && 880 fstrans_is_owner(mp) && 881 fstrans_getstate(mp) == FSTRANS_SUSPENDING) { 882 return 0; 883 } 884 885 return (vlockmgr(vp->v_vnlock, flags)); 886 } 887 888 /* 889 * Unlock the node. 890 */ 891 int 892 ffs_unlock(void *v) 893 { 894 struct vop_unlock_args /* { 895 struct vnode *a_vp; 896 int a_flags; 897 } */ *ap = v; 898 struct vnode *vp = ap->a_vp; 899 struct mount *mp = vp->v_mount; 900 901 KASSERT(ap->a_flags == 0); 902 903 /* 904 * Fake unlock during file system suspension. 905 */ 906 if ((vp->v_type == VREG || vp->v_type == VDIR) && 907 fstrans_is_owner(mp) && 908 fstrans_getstate(mp) == FSTRANS_SUSPENDING) { 909 return 0; 910 } 911 return (vlockmgr(vp->v_vnlock, LK_RELEASE)); 912 } 913 914 /* 915 * Return whether or not the node is locked. 916 */ 917 int 918 ffs_islocked(void *v) 919 { 920 struct vop_islocked_args /* { 921 struct vnode *a_vp; 922 } */ *ap = v; 923 struct vnode *vp = ap->a_vp; 924 925 return (vlockstatus(vp->v_vnlock)); 926 } 927
Indexes created Wed Oct 22 13:09:56 GMT 2025