ffs_vnops.c revision 1.107
1 /* $NetBSD: ffs_vnops.c,v 1.107 2008/12/22 12:18:48 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 2008 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. 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 1.107 2008/12/22 12:18:48 ad 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 if (ap->a_flags & FSYNC_DATAONLY) { 323 fstrans_done(vp->v_mount); 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(vp->v_mount); 333 return error; 334 } 335 error = ffs_update(vp, NULL, NULL, 336 (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0); 337 UFS_WAPBL_END(mp); 338 } 339 if (error || (ap->a_flags & FSYNC_NOLOG)) { 340 fstrans_done(vp->v_mount); 341 return error; 342 } 343 error = wapbl_flush(mp->mnt_wapbl, 0); 344 fstrans_done(vp->v_mount); 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, 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(vp->v_mount); 392 return error; 393 } 394 395 /* 396 * Synch an open file. Called for VOP_FSYNC() and VFS_FSYNC(). 397 * 398 * BEWARE: THIS ROUTINE ACCEPTS BOTH FFS AND NON-FFS VNODES. 399 */ 400 /* ARGSUSED */ 401 int 402 ffs_full_fsync(struct vnode *vp, int flags) 403 { 404 extern struct vfsops ffs_vfsops; 405 struct buf *bp, *nbp; 406 int error, passes, skipmeta, inodedeps_only, waitfor; 407 struct mount *mp; 408 bool ffsino; 409 410 error = 0; 411 412 if ((flags & FSYNC_VFS) != 0) { 413 KASSERT(vp->v_specmountpoint != NULL); 414 mp = vp->v_specmountpoint; 415 ffsino = (mp->mnt_op == &ffs_vfsops); 416 KASSERT(vp->v_type == VBLK); 417 } else { 418 mp = vp->v_mount; 419 ffsino = true; 420 KASSERT(vp->v_tag == VT_UFS); 421 } 422 423 if (vp->v_type == VBLK && 424 vp->v_specmountpoint != NULL && 425 (vp->v_specmountpoint->mnt_flag & MNT_SOFTDEP)) 426 softdep_fsync_mountdev(vp); 427 428 mutex_enter(&vp->v_interlock); 429 430 inodedeps_only = DOINGSOFTDEP(vp) && (flags & FSYNC_RECLAIM) 431 && UVM_OBJ_IS_CLEAN(&vp->v_uobj) && LIST_EMPTY(&vp->v_dirtyblkhd); 432 433 /* 434 * Flush all dirty data associated with a vnode. 435 */ 436 437 if (vp->v_type == VREG || vp->v_type == VBLK) { 438 int pflags = PGO_ALLPAGES | PGO_CLEANIT; 439 440 if ((flags & FSYNC_WAIT)) 441 pflags |= PGO_SYNCIO; 442 if (vp->v_type == VREG && 443 fstrans_getstate(mp) == FSTRANS_SUSPENDING) 444 pflags |= PGO_FREE; 445 error = VOP_PUTPAGES(vp, 0, 0, pflags); 446 if (error) 447 return error; 448 } else { 449 mutex_exit(&vp->v_interlock); 450 } 451 452 #ifdef WAPBL 453 if (mp && mp->mnt_wapbl) { 454 error = 0; 455 if (flags & FSYNC_DATAONLY) 456 return error; 457 458 if (ffsino && VTOI(vp) && (VTOI(vp)->i_flag & 459 (IN_ACCESS | IN_CHANGE | IN_UPDATE | IN_MODIFY | 460 IN_MODIFIED | IN_ACCESSED))) { 461 error = UFS_WAPBL_BEGIN(mp); 462 if (error) 463 return error; 464 error = ffs_update(vp, NULL, NULL, 465 (flags & FSYNC_WAIT) ? UPDATE_WAIT : 0); 466 UFS_WAPBL_END(mp); 467 } 468 if (error || (flags & FSYNC_NOLOG)) 469 return error; 470 471 /* 472 * Don't flush the log if the vnode being flushed 473 * contains no dirty buffers that could be in the log. 474 */ 475 if (!((flags & FSYNC_RECLAIM) && 476 LIST_EMPTY(&vp->v_dirtyblkhd))) { 477 error = wapbl_flush(mp->mnt_wapbl, 0); 478 if (error) 479 return error; 480 } 481 482 /* 483 * XXX temporary workaround for "dirty bufs" panic in 484 * vinvalbuf. need a full fix for the v_numoutput 485 * waiters issues. 486 */ 487 if (flags & FSYNC_WAIT) { 488 mutex_enter(&vp->v_interlock); 489 while (vp->v_numoutput) 490 cv_wait(&vp->v_cv, &vp->v_interlock); 491 mutex_exit(&vp->v_interlock); 492 } 493 494 return error; 495 } 496 #endif /* WAPBL */ 497 498 passes = NIADDR + 1; 499 skipmeta = 0; 500 if (flags & FSYNC_WAIT) 501 skipmeta = 1; 502 503 loop: 504 mutex_enter(&bufcache_lock); 505 LIST_FOREACH(bp, &vp->v_dirtyblkhd, b_vnbufs) { 506 bp->b_cflags &= ~BC_SCANNED; 507 } 508 for (bp = LIST_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { 509 nbp = LIST_NEXT(bp, b_vnbufs); 510 if (bp->b_cflags & (BC_BUSY | BC_SCANNED)) 511 continue; 512 if ((bp->b_oflags & BO_DELWRI) == 0) 513 panic("ffs_fsync: not dirty"); 514 if (skipmeta && bp->b_lblkno < 0) 515 continue; 516 bp->b_cflags |= BC_BUSY | BC_VFLUSH | BC_SCANNED; 517 mutex_exit(&bufcache_lock); 518 /* 519 * On our final pass through, do all I/O synchronously 520 * so that we can find out if our flush is failing 521 * because of write errors. 522 */ 523 if (passes > 0 || !(flags & FSYNC_WAIT)) 524 (void) bawrite(bp); 525 else if ((error = bwrite(bp)) != 0) 526 return (error); 527 /* 528 * Since we unlocked during the I/O, we need 529 * to start from a known point. 530 */ 531 mutex_enter(&bufcache_lock); 532 nbp = LIST_FIRST(&vp->v_dirtyblkhd); 533 } 534 mutex_exit(&bufcache_lock); 535 if (skipmeta) { 536 skipmeta = 0; 537 goto loop; 538 } 539 540 if (flags & FSYNC_WAIT) { 541 mutex_enter(&vp->v_interlock); 542 while (vp->v_numoutput) { 543 cv_wait(&vp->v_cv, &vp->v_interlock); 544 } 545 mutex_exit(&vp->v_interlock); 546 547 /* 548 * Ensure that any filesystem metadata associated 549 * with the vnode has been written. 550 */ 551 if ((error = softdep_sync_metadata(vp)) != 0) 552 return (error); 553 554 if (!LIST_EMPTY(&vp->v_dirtyblkhd)) { 555 /* 556 * Block devices associated with filesystems may 557 * have new I/O requests posted for them even if 558 * the vnode is locked, so no amount of trying will 559 * get them clean. Thus we give block devices a 560 * good effort, then just give up. For all other file 561 * types, go around and try again until it is clean. 562 */ 563 if (passes > 0) { 564 passes--; 565 goto loop; 566 } 567 #ifdef DIAGNOSTIC 568 if (vp->v_type != VBLK) 569 vprint("ffs_fsync: dirty", vp); 570 #endif 571 } 572 } 573 574 if (inodedeps_only) 575 waitfor = 0; 576 else 577 waitfor = (flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 578 579 if (ffsino) 580 error = ffs_update(vp, NULL, NULL, waitfor); 581 582 if (error == 0 && flags & FSYNC_CACHE) { 583 int i = 0; 584 if ((flags & FSYNC_VFS) == 0) { 585 KASSERT(VTOI(vp) != NULL); 586 vp = VTOI(vp)->i_devvp; 587 } 588 VOP_IOCTL(vp, DIOCCACHESYNC, &i, FWRITE, curlwp->l_cred); 589 } 590 591 return error; 592 } 593 594 /* 595 * Reclaim an inode so that it can be used for other purposes. 596 */ 597 int 598 ffs_reclaim(void *v) 599 { 600 struct vop_reclaim_args /* { 601 struct vnode *a_vp; 602 struct lwp *a_l; 603 } */ *ap = v; 604 struct vnode *vp = ap->a_vp; 605 struct inode *ip = VTOI(vp); 606 struct mount *mp = vp->v_mount; 607 struct ufsmount *ump = ip->i_ump; 608 void *data; 609 int error; 610 611 fstrans_start(mp, FSTRANS_LAZY); 612 if ((error = ufs_reclaim(vp)) != 0) { 613 fstrans_done(mp); 614 return (error); 615 } 616 if (ip->i_din.ffs1_din != NULL) { 617 if (ump->um_fstype == UFS1) 618 pool_cache_put(ffs_dinode1_cache, ip->i_din.ffs1_din); 619 else 620 pool_cache_put(ffs_dinode2_cache, ip->i_din.ffs2_din); 621 } 622 /* 623 * To interlock with ffs_sync(). 624 */ 625 genfs_node_destroy(vp); 626 mutex_enter(&vp->v_interlock); 627 data = vp->v_data; 628 vp->v_data = NULL; 629 mutex_exit(&vp->v_interlock); 630 631 /* 632 * XXX MFS ends up here, too, to free an inode. Should we create 633 * XXX a separate pool for MFS inodes? 634 */ 635 pool_cache_put(ffs_inode_cache, data); 636 fstrans_done(mp); 637 return (0); 638 } 639 640 #if 0 641 int 642 ffs_getpages(void *v) 643 { 644 struct vop_getpages_args /* { 645 struct vnode *a_vp; 646 voff_t a_offset; 647 struct vm_page **a_m; 648 int *a_count; 649 int a_centeridx; 650 vm_prot_t a_access_type; 651 int a_advice; 652 int a_flags; 653 } */ *ap = v; 654 struct vnode *vp = ap->a_vp; 655 struct inode *ip = VTOI(vp); 656 struct fs *fs = ip->i_fs; 657 658 /* 659 * don't allow a softdep write to create pages for only part of a block. 660 * the dependency tracking requires that all pages be in memory for 661 * a block involved in a dependency. 662 */ 663 664 if (ap->a_flags & PGO_OVERWRITE && 665 (blkoff(fs, ap->a_offset) != 0 || 666 blkoff(fs, *ap->a_count << PAGE_SHIFT) != 0) && 667 DOINGSOFTDEP(ap->a_vp)) { 668 if ((ap->a_flags & PGO_LOCKED) == 0) { 669 mutex_exit(&vp->v_interlock); 670 } 671 return EINVAL; 672 } 673 return genfs_getpages(v); 674 } 675 #endif 676 677 /* 678 * Return the last logical file offset that should be written for this file 679 * if we're doing a write that ends at "size". 680 */ 681 682 void 683 ffs_gop_size(struct vnode *vp, off_t size, off_t *eobp, int flags) 684 { 685 struct inode *ip = VTOI(vp); 686 struct fs *fs = ip->i_fs; 687 daddr_t olbn, nlbn; 688 689 olbn = lblkno(fs, ip->i_size); 690 nlbn = lblkno(fs, size); 691 if (nlbn < NDADDR && olbn <= nlbn) { 692 *eobp = fragroundup(fs, size); 693 } else { 694 *eobp = blkroundup(fs, size); 695 } 696 } 697 698 int 699 ffs_openextattr(void *v) 700 { 701 struct vop_openextattr_args /* { 702 struct vnode *a_vp; 703 kauth_cred_t a_cred; 704 struct proc *a_p; 705 } */ *ap = v; 706 struct inode *ip = VTOI(ap->a_vp); 707 struct fs *fs = ip->i_fs; 708 709 /* Not supported for UFS1 file systems. */ 710 if (fs->fs_magic == FS_UFS1_MAGIC) 711 return (EOPNOTSUPP); 712 713 /* XXX Not implemented for UFS2 file systems. */ 714 return (EOPNOTSUPP); 715 } 716 717 int 718 ffs_closeextattr(void *v) 719 { 720 struct vop_closeextattr_args /* { 721 struct vnode *a_vp; 722 int a_commit; 723 kauth_cred_t a_cred; 724 struct proc *a_p; 725 } */ *ap = v; 726 struct inode *ip = VTOI(ap->a_vp); 727 struct fs *fs = ip->i_fs; 728 729 /* Not supported for UFS1 file systems. */ 730 if (fs->fs_magic == FS_UFS1_MAGIC) 731 return (EOPNOTSUPP); 732 733 /* XXX Not implemented for UFS2 file systems. */ 734 return (EOPNOTSUPP); 735 } 736 737 int 738 ffs_getextattr(void *v) 739 { 740 struct vop_getextattr_args /* { 741 struct vnode *a_vp; 742 int a_attrnamespace; 743 const char *a_name; 744 struct uio *a_uio; 745 size_t *a_size; 746 kauth_cred_t a_cred; 747 struct proc *a_p; 748 } */ *ap = v; 749 struct vnode *vp = ap->a_vp; 750 struct inode *ip = VTOI(vp); 751 struct fs *fs = ip->i_fs; 752 753 if (fs->fs_magic == FS_UFS1_MAGIC) { 754 #ifdef UFS_EXTATTR 755 int error; 756 757 fstrans_start(vp->v_mount, FSTRANS_SHARED); 758 error = ufs_getextattr(ap); 759 fstrans_done(vp->v_mount); 760 return error; 761 #else 762 return (EOPNOTSUPP); 763 #endif 764 } 765 766 /* XXX Not implemented for UFS2 file systems. */ 767 return (EOPNOTSUPP); 768 } 769 770 int 771 ffs_setextattr(void *v) 772 { 773 struct vop_setextattr_args /* { 774 struct vnode *a_vp; 775 int a_attrnamespace; 776 const char *a_name; 777 struct uio *a_uio; 778 kauth_cred_t a_cred; 779 struct proc *a_p; 780 } */ *ap = v; 781 struct vnode *vp = ap->a_vp; 782 struct inode *ip = VTOI(vp); 783 struct fs *fs = ip->i_fs; 784 785 if (fs->fs_magic == FS_UFS1_MAGIC) { 786 #ifdef UFS_EXTATTR 787 int error; 788 789 fstrans_start(vp->v_mount, FSTRANS_SHARED); 790 error = ufs_setextattr(ap); 791 fstrans_done(vp->v_mount); 792 return error; 793 #else 794 return (EOPNOTSUPP); 795 #endif 796 } 797 798 /* XXX Not implemented for UFS2 file systems. */ 799 return (EOPNOTSUPP); 800 } 801 802 int 803 ffs_listextattr(void *v) 804 { 805 struct vop_listextattr_args /* { 806 struct vnode *a_vp; 807 int a_attrnamespace; 808 struct uio *a_uio; 809 size_t *a_size; 810 kauth_cred_t a_cred; 811 struct proc *a_p; 812 } */ *ap = v; 813 struct inode *ip = VTOI(ap->a_vp); 814 struct fs *fs = ip->i_fs; 815 816 /* Not supported for UFS1 file systems. */ 817 if (fs->fs_magic == FS_UFS1_MAGIC) 818 return (EOPNOTSUPP); 819 820 /* XXX Not implemented for UFS2 file systems. */ 821 return (EOPNOTSUPP); 822 } 823 824 int 825 ffs_deleteextattr(void *v) 826 { 827 struct vop_deleteextattr_args /* { 828 struct vnode *a_vp; 829 int a_attrnamespace; 830 kauth_cred_t a_cred; 831 struct proc *a_p; 832 } */ *ap = v; 833 struct vnode *vp = ap->a_vp; 834 struct inode *ip = VTOI(vp); 835 struct fs *fs = ip->i_fs; 836 837 if (fs->fs_magic == FS_UFS1_MAGIC) { 838 #ifdef UFS_EXTATTR 839 int error; 840 841 fstrans_start(vp->v_mount, FSTRANS_SHARED); 842 error = ufs_deleteextattr(ap); 843 fstrans_done(vp->v_mount); 844 return error; 845 #else 846 return (EOPNOTSUPP); 847 #endif 848 } 849 850 /* XXX Not implemented for UFS2 file systems. */ 851 return (EOPNOTSUPP); 852 } 853 854 /* 855 * Lock the node. 856 */ 857 int 858 ffs_lock(void *v) 859 { 860 struct vop_lock_args /* { 861 struct vnode *a_vp; 862 int a_flags; 863 } */ *ap = v; 864 struct vnode *vp = ap->a_vp; 865 struct mount *mp = vp->v_mount; 866 int flags = ap->a_flags; 867 868 if ((flags & LK_INTERLOCK) != 0) { 869 mutex_exit(&vp->v_interlock); 870 flags &= ~LK_INTERLOCK; 871 } 872 873 /* 874 * Fake lock during file system suspension. 875 */ 876 if ((vp->v_type == VREG || vp->v_type == VDIR) && 877 fstrans_is_owner(mp) && 878 fstrans_getstate(mp) == FSTRANS_SUSPENDING) { 879 return 0; 880 } 881 882 return (vlockmgr(vp->v_vnlock, flags)); 883 } 884 885 /* 886 * Unlock the node. 887 */ 888 int 889 ffs_unlock(void *v) 890 { 891 struct vop_unlock_args /* { 892 struct vnode *a_vp; 893 int a_flags; 894 } */ *ap = v; 895 struct vnode *vp = ap->a_vp; 896 struct mount *mp = vp->v_mount; 897 898 KASSERT(ap->a_flags == 0); 899 900 /* 901 * Fake unlock during file system suspension. 902 */ 903 if ((vp->v_type == VREG || vp->v_type == VDIR) && 904 fstrans_is_owner(mp) && 905 fstrans_getstate(mp) == FSTRANS_SUSPENDING) { 906 return 0; 907 } 908 return (vlockmgr(vp->v_vnlock, LK_RELEASE)); 909 } 910 911 /* 912 * Return whether or not the node is locked. 913 */ 914 int 915 ffs_islocked(void *v) 916 { 917 struct vop_islocked_args /* { 918 struct vnode *a_vp; 919 } */ *ap = v; 920 struct vnode *vp = ap->a_vp; 921 922 return (vlockstatus(vp->v_vnlock)); 923 } 924
Indexes created Tue Oct 07 21:09:53 GMT 2025