ffs_vnops.c revision 1.99.4.2
1 /* $NetBSD: ffs_vnops.c,v 1.99.4.2 2008/06/12 08:39:22 martin 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 1.99.4.2 2008/06/12 08:39:22 martin 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 error = ffs_full_fsync(vp, ap->a_flags); 298 goto out; 299 } 300 301 bsize = vp->v_mount->mnt_stat.f_iosize; 302 blk_high = ap->a_offhi / bsize; 303 if (ap->a_offhi % bsize != 0) 304 blk_high++; 305 306 /* 307 * First, flush all pages in range. 308 */ 309 310 mutex_enter(&vp->v_interlock); 311 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 312 round_page(ap->a_offhi), PGO_CLEANIT | 313 ((ap->a_flags & FSYNC_WAIT) ? PGO_SYNCIO : 0)); 314 if (error) { 315 goto out; 316 } 317 318 #ifdef WAPBL 319 mp = wapbl_vptomp(vp); 320 if (mp->mnt_wapbl) { 321 if (ap->a_flags & FSYNC_DATAONLY) { 322 fstrans_done(vp->v_mount); 323 return 0; 324 } 325 error = 0; 326 if (vp->v_tag == VT_UFS && VTOI(vp)->i_flag & 327 (IN_ACCESS | IN_CHANGE | IN_UPDATE | IN_MODIFY | 328 IN_MODIFIED | IN_ACCESSED)) { 329 error = UFS_WAPBL_BEGIN(mp); 330 if (error) { 331 fstrans_done(vp->v_mount); 332 return error; 333 } 334 error = ffs_update(vp, NULL, NULL, 335 (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0); 336 UFS_WAPBL_END(mp); 337 } 338 if (error || (ap->a_flags & FSYNC_NOLOG)) { 339 fstrans_done(vp->v_mount); 340 return error; 341 } 342 error = wapbl_flush(mp->mnt_wapbl, 0); 343 fstrans_done(vp->v_mount); 344 return error; 345 } 346 #endif /* WAPBL */ 347 348 /* 349 * Then, flush indirect blocks. 350 */ 351 352 if (blk_high >= NDADDR) { 353 error = ufs_getlbns(vp, blk_high, ia, &num); 354 if (error) 355 goto out; 356 357 mutex_enter(&bufcache_lock); 358 for (i = 0; i < num; i++) { 359 if ((bp = incore(vp, ia[i].in_lbn)) == NULL) 360 continue; 361 if ((bp->b_cflags & BC_BUSY) != 0 || 362 (bp->b_oflags & BO_DELWRI) == 0) 363 continue; 364 bp->b_cflags |= BC_BUSY | BC_VFLUSH; 365 mutex_exit(&bufcache_lock); 366 bawrite(bp); 367 mutex_enter(&bufcache_lock); 368 } 369 mutex_exit(&bufcache_lock); 370 } 371 372 if (ap->a_flags & FSYNC_WAIT) { 373 mutex_enter(&vp->v_interlock); 374 while (vp->v_numoutput > 0) 375 cv_wait(&vp->v_cv, &vp->v_interlock); 376 mutex_exit(&vp->v_interlock); 377 } 378 379 error = ffs_update(vp, NULL, NULL, 380 ((ap->a_flags & (FSYNC_WAIT | FSYNC_DATAONLY)) == FSYNC_WAIT) 381 ? UPDATE_WAIT : 0); 382 383 if (error == 0 && ap->a_flags & FSYNC_CACHE) { 384 int l = 0; 385 VOP_IOCTL(VTOI(vp)->i_devvp, DIOCCACHESYNC, &l, FWRITE, 386 curlwp->l_cred); 387 } 388 389 out: 390 fstrans_done(vp->v_mount); 391 return error; 392 } 393 394 /* 395 * Synch an open file. 396 */ 397 /* ARGSUSED */ 398 int 399 ffs_full_fsync(struct vnode *vp, int flags) 400 { 401 struct buf *bp, *nbp; 402 int error, passes, skipmeta, inodedeps_only, waitfor; 403 struct mount *mp; 404 405 error = 0; 406 407 if (vp->v_type == VBLK && 408 vp->v_specmountpoint != NULL && 409 (vp->v_specmountpoint->mnt_flag & MNT_SOFTDEP)) 410 softdep_fsync_mountdev(vp); 411 412 mutex_enter(&vp->v_interlock); 413 414 inodedeps_only = DOINGSOFTDEP(vp) && (flags & FSYNC_RECLAIM) 415 && UVM_OBJ_IS_CLEAN(&vp->v_uobj) && LIST_EMPTY(&vp->v_dirtyblkhd); 416 417 /* 418 * Flush all dirty data associated with a vnode. 419 */ 420 421 mp = NULL; 422 if (vp->v_type == VREG || vp->v_type == VBLK) { 423 if ((flags & FSYNC_VFS) != 0) 424 mp = vp->v_specmountpoint; 425 else 426 mp = vp->v_mount; 427 error = VOP_PUTPAGES(vp, 0, 0, PGO_ALLPAGES | PGO_CLEANIT | 428 ((flags & FSYNC_WAIT) ? PGO_SYNCIO : 0) | 429 (fstrans_getstate(mp) == FSTRANS_SUSPENDING ? 430 PGO_FREE : 0)); 431 if (error) 432 return error; 433 } else 434 mutex_exit(&vp->v_interlock); 435 436 #ifdef WAPBL 437 mp = wapbl_vptomp(vp); /* XXXXXX anti-kern/38057 hack */ 438 if (mp && mp->mnt_wapbl) { 439 error = 0; 440 if (flags & FSYNC_DATAONLY) 441 return error; 442 443 if (VTOI(vp)->i_flag & 444 (IN_ACCESS | IN_CHANGE | IN_UPDATE | IN_MODIFY | 445 IN_MODIFIED | IN_ACCESSED)) { 446 error = UFS_WAPBL_BEGIN(mp); 447 if (error) 448 return error; 449 error = ffs_update(vp, NULL, NULL, 450 (flags & FSYNC_WAIT) ? UPDATE_WAIT : 0); 451 UFS_WAPBL_END(mp); 452 } 453 if (error || (flags & FSYNC_NOLOG)) 454 return error; 455 /* 456 * Don't flush the log if the vnode being flushed 457 * contains no dirty buffers that could be in the log. 458 */ 459 if (!((flags & FSYNC_RECLAIM) && 460 LIST_EMPTY(&vp->v_dirtyblkhd))) { 461 error = wapbl_flush(mp->mnt_wapbl, 0); 462 if (error) 463 return error; 464 } 465 466 /* 467 * XXX temporary workaround for "dirty bufs" panic in 468 * vinvalbuf. need a full fix for the v_numoutput 469 * waiters issues. 470 */ 471 if (flags & FSYNC_WAIT) { 472 mutex_enter(&vp->v_interlock); 473 while (vp->v_numoutput) 474 cv_wait(&vp->v_cv, &vp->v_interlock); 475 mutex_exit(&vp->v_interlock); 476 } 477 478 return error; 479 } 480 #endif /* WAPBL */ 481 482 passes = NIADDR + 1; 483 skipmeta = 0; 484 if (flags & FSYNC_WAIT) 485 skipmeta = 1; 486 487 loop: 488 mutex_enter(&bufcache_lock); 489 LIST_FOREACH(bp, &vp->v_dirtyblkhd, b_vnbufs) { 490 bp->b_cflags &= ~BC_SCANNED; 491 } 492 for (bp = LIST_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { 493 nbp = LIST_NEXT(bp, b_vnbufs); 494 if (bp->b_cflags & (BC_BUSY | BC_SCANNED)) 495 continue; 496 if ((bp->b_oflags & BO_DELWRI) == 0) 497 panic("ffs_fsync: not dirty"); 498 if (skipmeta && bp->b_lblkno < 0) 499 continue; 500 bp->b_cflags |= BC_BUSY | BC_VFLUSH | BC_SCANNED; 501 mutex_exit(&bufcache_lock); 502 /* 503 * On our final pass through, do all I/O synchronously 504 * so that we can find out if our flush is failing 505 * because of write errors. 506 */ 507 if (passes > 0 || !(flags & FSYNC_WAIT)) 508 (void) bawrite(bp); 509 else if ((error = bwrite(bp)) != 0) 510 return (error); 511 /* 512 * Since we unlocked during the I/O, we need 513 * to start from a known point. 514 */ 515 mutex_enter(&bufcache_lock); 516 nbp = LIST_FIRST(&vp->v_dirtyblkhd); 517 } 518 mutex_exit(&bufcache_lock); 519 if (skipmeta) { 520 skipmeta = 0; 521 goto loop; 522 } 523 524 if (flags & FSYNC_WAIT) { 525 mutex_enter(&vp->v_interlock); 526 while (vp->v_numoutput) { 527 cv_wait(&vp->v_cv, &vp->v_interlock); 528 } 529 mutex_exit(&vp->v_interlock); 530 531 /* 532 * Ensure that any filesystem metadata associated 533 * with the vnode has been written. 534 */ 535 if ((error = softdep_sync_metadata(vp)) != 0) 536 return (error); 537 538 if (!LIST_EMPTY(&vp->v_dirtyblkhd)) { 539 /* 540 * Block devices associated with filesystems may 541 * have new I/O requests posted for them even if 542 * the vnode is locked, so no amount of trying will 543 * get them clean. Thus we give block devices a 544 * good effort, then just give up. For all other file 545 * types, go around and try again until it is clean. 546 */ 547 if (passes > 0) { 548 passes--; 549 goto loop; 550 } 551 #ifdef DIAGNOSTIC 552 if (vp->v_type != VBLK) 553 vprint("ffs_fsync: dirty", vp); 554 #endif 555 } 556 } 557 558 if (inodedeps_only) 559 waitfor = 0; 560 else 561 waitfor = (flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 562 563 if (vp->v_tag == VT_UFS) 564 error = ffs_update(vp, NULL, NULL, waitfor); 565 else { 566 KASSERT(vp->v_type == VBLK); 567 KASSERT((flags & FSYNC_VFS) != 0); 568 } 569 570 if (error == 0 && flags & FSYNC_CACHE) { 571 int i = 0; 572 if ((flags & FSYNC_VFS) == 0) 573 vp = VTOI(vp)->i_devvp; 574 VOP_IOCTL(vp, DIOCCACHESYNC, &i, FWRITE, curlwp->l_cred); 575 } 576 577 return error; 578 } 579 580 /* 581 * Reclaim an inode so that it can be used for other purposes. 582 */ 583 int 584 ffs_reclaim(void *v) 585 { 586 struct vop_reclaim_args /* { 587 struct vnode *a_vp; 588 struct lwp *a_l; 589 } */ *ap = v; 590 struct vnode *vp = ap->a_vp; 591 struct inode *ip = VTOI(vp); 592 struct mount *mp = vp->v_mount; 593 struct ufsmount *ump = ip->i_ump; 594 void *data; 595 int error; 596 597 fstrans_start(mp, FSTRANS_LAZY); 598 if ((error = ufs_reclaim(vp)) != 0) { 599 fstrans_done(mp); 600 return (error); 601 } 602 if (ip->i_din.ffs1_din != NULL) { 603 if (ump->um_fstype == UFS1) 604 pool_cache_put(ffs_dinode1_cache, ip->i_din.ffs1_din); 605 else 606 pool_cache_put(ffs_dinode2_cache, ip->i_din.ffs2_din); 607 } 608 /* 609 * To interlock with ffs_sync(). 610 */ 611 genfs_node_destroy(vp); 612 mutex_enter(&vp->v_interlock); 613 data = vp->v_data; 614 vp->v_data = NULL; 615 mutex_exit(&vp->v_interlock); 616 617 /* 618 * XXX MFS ends up here, too, to free an inode. Should we create 619 * XXX a separate pool for MFS inodes? 620 */ 621 pool_cache_put(ffs_inode_cache, data); 622 fstrans_done(mp); 623 return (0); 624 } 625 626 #if 0 627 int 628 ffs_getpages(void *v) 629 { 630 struct vop_getpages_args /* { 631 struct vnode *a_vp; 632 voff_t a_offset; 633 struct vm_page **a_m; 634 int *a_count; 635 int a_centeridx; 636 vm_prot_t a_access_type; 637 int a_advice; 638 int a_flags; 639 } */ *ap = v; 640 struct vnode *vp = ap->a_vp; 641 struct inode *ip = VTOI(vp); 642 struct fs *fs = ip->i_fs; 643 644 /* 645 * don't allow a softdep write to create pages for only part of a block. 646 * the dependency tracking requires that all pages be in memory for 647 * a block involved in a dependency. 648 */ 649 650 if (ap->a_flags & PGO_OVERWRITE && 651 (blkoff(fs, ap->a_offset) != 0 || 652 blkoff(fs, *ap->a_count << PAGE_SHIFT) != 0) && 653 DOINGSOFTDEP(ap->a_vp)) { 654 if ((ap->a_flags & PGO_LOCKED) == 0) { 655 mutex_exit(&vp->v_interlock); 656 } 657 return EINVAL; 658 } 659 return genfs_getpages(v); 660 } 661 #endif 662 663 /* 664 * Return the last logical file offset that should be written for this file 665 * if we're doing a write that ends at "size". 666 */ 667 668 void 669 ffs_gop_size(struct vnode *vp, off_t size, off_t *eobp, int flags) 670 { 671 struct inode *ip = VTOI(vp); 672 struct fs *fs = ip->i_fs; 673 daddr_t olbn, nlbn; 674 675 olbn = lblkno(fs, ip->i_size); 676 nlbn = lblkno(fs, size); 677 if (nlbn < NDADDR && olbn <= nlbn) { 678 *eobp = fragroundup(fs, size); 679 } else { 680 *eobp = blkroundup(fs, size); 681 } 682 } 683 684 int 685 ffs_openextattr(void *v) 686 { 687 struct vop_openextattr_args /* { 688 struct vnode *a_vp; 689 kauth_cred_t a_cred; 690 struct proc *a_p; 691 } */ *ap = v; 692 struct inode *ip = VTOI(ap->a_vp); 693 struct fs *fs = ip->i_fs; 694 695 /* Not supported for UFS1 file systems. */ 696 if (fs->fs_magic == FS_UFS1_MAGIC) 697 return (EOPNOTSUPP); 698 699 /* XXX Not implemented for UFS2 file systems. */ 700 return (EOPNOTSUPP); 701 } 702 703 int 704 ffs_closeextattr(void *v) 705 { 706 struct vop_closeextattr_args /* { 707 struct vnode *a_vp; 708 int a_commit; 709 kauth_cred_t a_cred; 710 struct proc *a_p; 711 } */ *ap = v; 712 struct inode *ip = VTOI(ap->a_vp); 713 struct fs *fs = ip->i_fs; 714 715 /* Not supported for UFS1 file systems. */ 716 if (fs->fs_magic == FS_UFS1_MAGIC) 717 return (EOPNOTSUPP); 718 719 /* XXX Not implemented for UFS2 file systems. */ 720 return (EOPNOTSUPP); 721 } 722 723 int 724 ffs_getextattr(void *v) 725 { 726 struct vop_getextattr_args /* { 727 struct vnode *a_vp; 728 int a_attrnamespace; 729 const char *a_name; 730 struct uio *a_uio; 731 size_t *a_size; 732 kauth_cred_t a_cred; 733 struct proc *a_p; 734 } */ *ap = v; 735 struct vnode *vp = ap->a_vp; 736 struct inode *ip = VTOI(vp); 737 struct fs *fs = ip->i_fs; 738 739 if (fs->fs_magic == FS_UFS1_MAGIC) { 740 #ifdef UFS_EXTATTR 741 int error; 742 743 fstrans_start(vp->v_mount, FSTRANS_SHARED); 744 error = ufs_getextattr(ap); 745 fstrans_done(vp->v_mount); 746 return error; 747 #else 748 return (EOPNOTSUPP); 749 #endif 750 } 751 752 /* XXX Not implemented for UFS2 file systems. */ 753 return (EOPNOTSUPP); 754 } 755 756 int 757 ffs_setextattr(void *v) 758 { 759 struct vop_setextattr_args /* { 760 struct vnode *a_vp; 761 int a_attrnamespace; 762 const char *a_name; 763 struct uio *a_uio; 764 kauth_cred_t a_cred; 765 struct proc *a_p; 766 } */ *ap = v; 767 struct vnode *vp = ap->a_vp; 768 struct inode *ip = VTOI(vp); 769 struct fs *fs = ip->i_fs; 770 771 if (fs->fs_magic == FS_UFS1_MAGIC) { 772 #ifdef UFS_EXTATTR 773 int error; 774 775 fstrans_start(vp->v_mount, FSTRANS_SHARED); 776 error = ufs_setextattr(ap); 777 fstrans_done(vp->v_mount); 778 return error; 779 #else 780 return (EOPNOTSUPP); 781 #endif 782 } 783 784 /* XXX Not implemented for UFS2 file systems. */ 785 return (EOPNOTSUPP); 786 } 787 788 int 789 ffs_listextattr(void *v) 790 { 791 struct vop_listextattr_args /* { 792 struct vnode *a_vp; 793 int a_attrnamespace; 794 struct uio *a_uio; 795 size_t *a_size; 796 kauth_cred_t a_cred; 797 struct proc *a_p; 798 } */ *ap = v; 799 struct inode *ip = VTOI(ap->a_vp); 800 struct fs *fs = ip->i_fs; 801 802 /* Not supported for UFS1 file systems. */ 803 if (fs->fs_magic == FS_UFS1_MAGIC) 804 return (EOPNOTSUPP); 805 806 /* XXX Not implemented for UFS2 file systems. */ 807 return (EOPNOTSUPP); 808 } 809 810 int 811 ffs_deleteextattr(void *v) 812 { 813 struct vop_deleteextattr_args /* { 814 struct vnode *a_vp; 815 int a_attrnamespace; 816 kauth_cred_t a_cred; 817 struct proc *a_p; 818 } */ *ap = v; 819 struct vnode *vp = ap->a_vp; 820 struct inode *ip = VTOI(vp); 821 struct fs *fs = ip->i_fs; 822 823 if (fs->fs_magic == FS_UFS1_MAGIC) { 824 #ifdef UFS_EXTATTR 825 int error; 826 827 fstrans_start(vp->v_mount, FSTRANS_SHARED); 828 error = ufs_deleteextattr(ap); 829 fstrans_done(vp->v_mount); 830 return error; 831 #else 832 return (EOPNOTSUPP); 833 #endif 834 } 835 836 /* XXX Not implemented for UFS2 file systems. */ 837 return (EOPNOTSUPP); 838 } 839 840 /* 841 * Lock the node. 842 */ 843 int 844 ffs_lock(void *v) 845 { 846 struct vop_lock_args /* { 847 struct vnode *a_vp; 848 int a_flags; 849 } */ *ap = v; 850 struct vnode *vp = ap->a_vp; 851 struct mount *mp = vp->v_mount; 852 struct vnlock *lkp; 853 int flags = ap->a_flags; 854 int result; 855 856 if ((flags & LK_INTERLOCK) != 0) { 857 mutex_exit(&vp->v_interlock); 858 flags &= ~LK_INTERLOCK; 859 } 860 861 /* 862 * Fake lock during file system suspension. 863 */ 864 if ((vp->v_type == VREG || vp->v_type == VDIR) && 865 fstrans_is_owner(mp) && 866 fstrans_getstate(mp) == FSTRANS_SUSPENDING) { 867 return 0; 868 } 869 870 for (;;) { 871 lkp = vp->v_vnlock; 872 result = vlockmgr(lkp, flags); 873 if (lkp == vp->v_vnlock || result != 0) 874 return result; 875 /* 876 * Apparent success, except that the vnode mutated between 877 * snapshot file vnode and regular file vnode while this 878 * thread slept. The lock currently held is not the right 879 * lock. Release it, and try to get the new lock. 880 */ 881 (void) vlockmgr(lkp, LK_RELEASE); 882 } 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 Thu Oct 23 18:09:57 GMT 2025