ffs_vnops.c revision 1.99.4.1
1 /* $NetBSD: ffs_vnops.c,v 1.99.4.1 2008/06/10 14:51:23 simonb 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (c) 1982, 1986, 1989, 1993 41 * The Regents of the University of California. All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. Neither the name of the University nor the names of its contributors 52 * may be used to endorse or promote products derived from this software 53 * without specific prior written permission. 54 * 55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 65 * SUCH DAMAGE. 66 * 67 * @(#)ffs_vnops.c 8.15 (Berkeley) 5/14/95 68 */ 69 70 #include <sys/cdefs.h> 71 __KERNEL_RCSID(0, "$NetBSD: ffs_vnops.c,v 1.99.4.1 2008/06/10 14:51:23 simonb Exp $"); 72 73 #if defined(_KERNEL_OPT) 74 #include "opt_ffs.h" 75 #include "opt_wapbl.h" 76 #endif 77 78 #include <sys/param.h> 79 #include <sys/systm.h> 80 #include <sys/resourcevar.h> 81 #include <sys/kernel.h> 82 #include <sys/file.h> 83 #include <sys/stat.h> 84 #include <sys/buf.h> 85 #include <sys/event.h> 86 #include <sys/proc.h> 87 #include <sys/mount.h> 88 #include <sys/vnode.h> 89 #include <sys/pool.h> 90 #include <sys/signalvar.h> 91 #include <sys/kauth.h> 92 #include <sys/wapbl.h> 93 #include <sys/fstrans.h> 94 95 #include <miscfs/fifofs/fifo.h> 96 #include <miscfs/genfs/genfs.h> 97 #include <miscfs/specfs/specdev.h> 98 99 #include <ufs/ufs/inode.h> 100 #include <ufs/ufs/dir.h> 101 #include <ufs/ufs/ufs_extern.h> 102 #include <ufs/ufs/ufsmount.h> 103 #include <ufs/ufs/ufs_wapbl.h> 104 105 #include <ufs/ffs/fs.h> 106 #include <ufs/ffs/ffs_extern.h> 107 108 #include <uvm/uvm.h> 109 110 /* Global vfs data structures for ufs. */ 111 int (**ffs_vnodeop_p)(void *); 112 const struct vnodeopv_entry_desc ffs_vnodeop_entries[] = { 113 { &vop_default_desc, vn_default_error }, 114 { &vop_lookup_desc, ufs_lookup }, /* lookup */ 115 { &vop_create_desc, ufs_create }, /* create */ 116 { &vop_whiteout_desc, ufs_whiteout }, /* whiteout */ 117 { &vop_mknod_desc, ufs_mknod }, /* mknod */ 118 { &vop_open_desc, ufs_open }, /* open */ 119 { &vop_close_desc, ufs_close }, /* close */ 120 { &vop_access_desc, ufs_access }, /* access */ 121 { &vop_getattr_desc, ufs_getattr }, /* getattr */ 122 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 123 { &vop_read_desc, ffs_read }, /* read */ 124 { &vop_write_desc, ffs_write }, /* write */ 125 { &vop_ioctl_desc, ufs_ioctl }, /* ioctl */ 126 { &vop_fcntl_desc, ufs_fcntl }, /* fcntl */ 127 { &vop_poll_desc, ufs_poll }, /* poll */ 128 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ 129 { &vop_revoke_desc, ufs_revoke }, /* revoke */ 130 { &vop_mmap_desc, ufs_mmap }, /* mmap */ 131 { &vop_fsync_desc, ffs_fsync }, /* fsync */ 132 { &vop_seek_desc, ufs_seek }, /* seek */ 133 { &vop_remove_desc, ufs_remove }, /* remove */ 134 { &vop_link_desc, ufs_link }, /* link */ 135 { &vop_rename_desc, ufs_rename }, /* rename */ 136 { &vop_mkdir_desc, ufs_mkdir }, /* mkdir */ 137 { &vop_rmdir_desc, ufs_rmdir }, /* rmdir */ 138 { &vop_symlink_desc, ufs_symlink }, /* symlink */ 139 { &vop_readdir_desc, ufs_readdir }, /* readdir */ 140 { &vop_readlink_desc, ufs_readlink }, /* readlink */ 141 { &vop_abortop_desc, ufs_abortop }, /* abortop */ 142 { &vop_inactive_desc, ufs_inactive }, /* inactive */ 143 { &vop_reclaim_desc, ffs_reclaim }, /* reclaim */ 144 { &vop_lock_desc, ffs_lock }, /* lock */ 145 { &vop_unlock_desc, ffs_unlock }, /* unlock */ 146 { &vop_bmap_desc, ufs_bmap }, /* bmap */ 147 { &vop_strategy_desc, ufs_strategy }, /* strategy */ 148 { &vop_print_desc, ufs_print }, /* print */ 149 { &vop_islocked_desc, ffs_islocked }, /* islocked */ 150 { &vop_pathconf_desc, ufs_pathconf }, /* pathconf */ 151 { &vop_advlock_desc, ufs_advlock }, /* advlock */ 152 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 153 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 154 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 155 { &vop_openextattr_desc, ffs_openextattr }, /* openextattr */ 156 { &vop_closeextattr_desc, ffs_closeextattr }, /* closeextattr */ 157 { &vop_getextattr_desc, ffs_getextattr }, /* getextattr */ 158 { &vop_setextattr_desc, ffs_setextattr }, /* setextattr */ 159 { &vop_listextattr_desc, ffs_listextattr }, /* listextattr */ 160 { &vop_deleteextattr_desc, ffs_deleteextattr }, /* deleteextattr */ 161 { NULL, NULL } 162 }; 163 const struct vnodeopv_desc ffs_vnodeop_opv_desc = 164 { &ffs_vnodeop_p, ffs_vnodeop_entries }; 165 166 int (**ffs_specop_p)(void *); 167 const struct vnodeopv_entry_desc ffs_specop_entries[] = { 168 { &vop_default_desc, vn_default_error }, 169 { &vop_lookup_desc, spec_lookup }, /* lookup */ 170 { &vop_create_desc, spec_create }, /* create */ 171 { &vop_mknod_desc, spec_mknod }, /* mknod */ 172 { &vop_open_desc, spec_open }, /* open */ 173 { &vop_close_desc, ufsspec_close }, /* close */ 174 { &vop_access_desc, ufs_access }, /* access */ 175 { &vop_getattr_desc, ufs_getattr }, /* getattr */ 176 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 177 { &vop_read_desc, ufsspec_read }, /* read */ 178 { &vop_write_desc, ufsspec_write }, /* write */ 179 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 180 { &vop_fcntl_desc, ufs_fcntl }, /* fcntl */ 181 { &vop_poll_desc, spec_poll }, /* poll */ 182 { &vop_kqfilter_desc, spec_kqfilter }, /* kqfilter */ 183 { &vop_revoke_desc, spec_revoke }, /* revoke */ 184 { &vop_mmap_desc, spec_mmap }, /* mmap */ 185 { &vop_fsync_desc, ffs_fsync }, /* fsync */ 186 { &vop_seek_desc, spec_seek }, /* seek */ 187 { &vop_remove_desc, spec_remove }, /* remove */ 188 { &vop_link_desc, spec_link }, /* link */ 189 { &vop_rename_desc, spec_rename }, /* rename */ 190 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 191 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 192 { &vop_symlink_desc, spec_symlink }, /* symlink */ 193 { &vop_readdir_desc, spec_readdir }, /* readdir */ 194 { &vop_readlink_desc, spec_readlink }, /* readlink */ 195 { &vop_abortop_desc, spec_abortop }, /* abortop */ 196 { &vop_inactive_desc, ufs_inactive }, /* inactive */ 197 { &vop_reclaim_desc, ffs_reclaim }, /* reclaim */ 198 { &vop_lock_desc, ffs_lock }, /* lock */ 199 { &vop_unlock_desc, ffs_unlock }, /* unlock */ 200 { &vop_bmap_desc, spec_bmap }, /* bmap */ 201 { &vop_strategy_desc, spec_strategy }, /* strategy */ 202 { &vop_print_desc, ufs_print }, /* print */ 203 { &vop_islocked_desc, ffs_islocked }, /* islocked */ 204 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 205 { &vop_advlock_desc, spec_advlock }, /* advlock */ 206 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 207 { &vop_getpages_desc, spec_getpages }, /* getpages */ 208 { &vop_putpages_desc, spec_putpages }, /* putpages */ 209 { &vop_openextattr_desc, ffs_openextattr }, /* openextattr */ 210 { &vop_closeextattr_desc, ffs_closeextattr }, /* closeextattr */ 211 { &vop_getextattr_desc, ffs_getextattr }, /* getextattr */ 212 { &vop_setextattr_desc, ffs_setextattr }, /* setextattr */ 213 { &vop_listextattr_desc, ffs_listextattr }, /* listextattr */ 214 { &vop_deleteextattr_desc, ffs_deleteextattr }, /* deleteextattr */ 215 { NULL, NULL } 216 }; 217 const struct vnodeopv_desc ffs_specop_opv_desc = 218 { &ffs_specop_p, ffs_specop_entries }; 219 220 int (**ffs_fifoop_p)(void *); 221 const struct vnodeopv_entry_desc ffs_fifoop_entries[] = { 222 { &vop_default_desc, vn_default_error }, 223 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 224 { &vop_create_desc, fifo_create }, /* create */ 225 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 226 { &vop_open_desc, fifo_open }, /* open */ 227 { &vop_close_desc, ufsfifo_close }, /* close */ 228 { &vop_access_desc, ufs_access }, /* access */ 229 { &vop_getattr_desc, ufs_getattr }, /* getattr */ 230 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 231 { &vop_read_desc, ufsfifo_read }, /* read */ 232 { &vop_write_desc, ufsfifo_write }, /* write */ 233 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 234 { &vop_fcntl_desc, ufs_fcntl }, /* fcntl */ 235 { &vop_poll_desc, fifo_poll }, /* poll */ 236 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 237 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 238 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 239 { &vop_fsync_desc, ffs_fsync }, /* fsync */ 240 { &vop_seek_desc, fifo_seek }, /* seek */ 241 { &vop_remove_desc, fifo_remove }, /* remove */ 242 { &vop_link_desc, fifo_link }, /* link */ 243 { &vop_rename_desc, fifo_rename }, /* rename */ 244 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 245 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 246 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 247 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 248 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 249 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 250 { &vop_inactive_desc, ufs_inactive }, /* inactive */ 251 { &vop_reclaim_desc, ffs_reclaim }, /* reclaim */ 252 { &vop_lock_desc, ffs_lock }, /* lock */ 253 { &vop_unlock_desc, ffs_unlock }, /* unlock */ 254 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 255 { &vop_strategy_desc, fifo_strategy }, /* strategy */ 256 { &vop_print_desc, ufs_print }, /* print */ 257 { &vop_islocked_desc, ffs_islocked }, /* islocked */ 258 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 259 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 260 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 261 { &vop_putpages_desc, fifo_putpages }, /* putpages */ 262 { &vop_openextattr_desc, ffs_openextattr }, /* openextattr */ 263 { &vop_closeextattr_desc, ffs_closeextattr }, /* closeextattr */ 264 { &vop_getextattr_desc, ffs_getextattr }, /* getextattr */ 265 { &vop_setextattr_desc, ffs_setextattr }, /* setextattr */ 266 { &vop_listextattr_desc, ffs_listextattr }, /* listextattr */ 267 { &vop_deleteextattr_desc, ffs_deleteextattr }, /* deleteextattr */ 268 { NULL, NULL } 269 }; 270 const struct vnodeopv_desc ffs_fifoop_opv_desc = 271 { &ffs_fifoop_p, ffs_fifoop_entries }; 272 273 #include <ufs/ufs/ufs_readwrite.c> 274 275 int 276 ffs_fsync(void *v) 277 { 278 struct vop_fsync_args /* { 279 struct vnode *a_vp; 280 kauth_cred_t a_cred; 281 int a_flags; 282 off_t a_offlo; 283 off_t a_offhi; 284 struct lwp *a_l; 285 } */ *ap = v; 286 struct buf *bp; 287 int num, error, i; 288 struct indir ia[NIADDR + 1]; 289 int bsize; 290 daddr_t blk_high; 291 struct vnode *vp; 292 #ifdef WAPBL 293 struct mount *mp; 294 #endif 295 296 vp = ap->a_vp; 297 298 fstrans_start(vp->v_mount, FSTRANS_LAZY); 299 /* 300 * XXX no easy way to sync a range in a file with softdep. 301 */ 302 if ((ap->a_offlo == 0 && ap->a_offhi == 0) || DOINGSOFTDEP(vp) || 303 (vp->v_type != VREG)) { 304 error = ffs_full_fsync(vp, ap->a_flags); 305 goto out; 306 } 307 308 bsize = vp->v_mount->mnt_stat.f_iosize; 309 blk_high = ap->a_offhi / bsize; 310 if (ap->a_offhi % bsize != 0) 311 blk_high++; 312 313 /* 314 * First, flush all pages in range. 315 */ 316 317 mutex_enter(&vp->v_interlock); 318 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 319 round_page(ap->a_offhi), PGO_CLEANIT | 320 ((ap->a_flags & FSYNC_WAIT) ? PGO_SYNCIO : 0)); 321 if (error) { 322 goto out; 323 } 324 325 #ifdef WAPBL 326 mp = wapbl_vptomp(vp); 327 if (mp->mnt_wapbl) { 328 if (ap->a_flags & FSYNC_DATAONLY) { 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, 342 (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0); 343 UFS_WAPBL_END(mp); 344 } 345 if (error || (ap->a_flags & FSYNC_NOLOG)) { 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, 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. 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; 410 struct mount *mp; 411 412 error = 0; 413 414 if (vp->v_type == VBLK && 415 vp->v_specmountpoint != NULL && 416 (vp->v_specmountpoint->mnt_flag & MNT_SOFTDEP)) 417 softdep_fsync_mountdev(vp); 418 419 mutex_enter(&vp->v_interlock); 420 421 inodedeps_only = DOINGSOFTDEP(vp) && (flags & FSYNC_RECLAIM) 422 && UVM_OBJ_IS_CLEAN(&vp->v_uobj) && LIST_EMPTY(&vp->v_dirtyblkhd); 423 424 /* 425 * Flush all dirty data associated with a vnode. 426 */ 427 428 mp = NULL; 429 if (vp->v_type == VREG || vp->v_type == VBLK) { 430 if ((flags & FSYNC_VFS) != 0) 431 mp = vp->v_specmountpoint; 432 else 433 mp = vp->v_mount; 434 error = VOP_PUTPAGES(vp, 0, 0, PGO_ALLPAGES | PGO_CLEANIT | 435 ((flags & FSYNC_WAIT) ? PGO_SYNCIO : 0) | 436 (fstrans_getstate(mp) == FSTRANS_SUSPENDING ? 437 PGO_FREE : 0)); 438 if (error) 439 return error; 440 } else 441 mutex_exit(&vp->v_interlock); 442 443 #ifdef WAPBL 444 mp = wapbl_vptomp(vp); /* XXXXXX anti-kern/38057 hack */ 445 if (mp && mp->mnt_wapbl) { 446 error = 0; 447 if (flags & FSYNC_DATAONLY) 448 return error; 449 450 if (VTOI(vp)->i_flag & 451 (IN_ACCESS | IN_CHANGE | IN_UPDATE | IN_MODIFY | 452 IN_MODIFIED | IN_ACCESSED)) { 453 error = UFS_WAPBL_BEGIN(mp); 454 if (error) 455 return error; 456 error = ffs_update(vp, NULL, NULL, 457 (flags & FSYNC_WAIT) ? UPDATE_WAIT : 0); 458 UFS_WAPBL_END(mp); 459 } 460 if (error || (flags & FSYNC_NOLOG)) 461 return error; 462 /* 463 * Don't flush the log if the vnode being flushed 464 * contains no dirty buffers that could be in the log. 465 */ 466 if (!((flags & FSYNC_RECLAIM) && 467 LIST_EMPTY(&vp->v_dirtyblkhd))) { 468 error = wapbl_flush(mp->mnt_wapbl, 0); 469 if (error) 470 return error; 471 } 472 473 /* 474 * XXX temporary workaround for "dirty bufs" panic in 475 * vinvalbuf. need a full fix for the v_numoutput 476 * waiters issues. 477 */ 478 if (flags & FSYNC_WAIT) { 479 mutex_enter(&vp->v_interlock); 480 while (vp->v_numoutput) 481 cv_wait(&vp->v_cv, &vp->v_interlock); 482 mutex_exit(&vp->v_interlock); 483 } 484 485 return error; 486 } 487 #endif /* WAPBL */ 488 489 passes = NIADDR + 1; 490 skipmeta = 0; 491 if (flags & FSYNC_WAIT) 492 skipmeta = 1; 493 494 loop: 495 mutex_enter(&bufcache_lock); 496 LIST_FOREACH(bp, &vp->v_dirtyblkhd, b_vnbufs) { 497 bp->b_cflags &= ~BC_SCANNED; 498 } 499 for (bp = LIST_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { 500 nbp = LIST_NEXT(bp, b_vnbufs); 501 if (bp->b_cflags & (BC_BUSY | BC_SCANNED)) 502 continue; 503 if ((bp->b_oflags & BO_DELWRI) == 0) 504 panic("ffs_fsync: not dirty"); 505 if (skipmeta && bp->b_lblkno < 0) 506 continue; 507 bp->b_cflags |= BC_BUSY | BC_VFLUSH | BC_SCANNED; 508 mutex_exit(&bufcache_lock); 509 /* 510 * On our final pass through, do all I/O synchronously 511 * so that we can find out if our flush is failing 512 * because of write errors. 513 */ 514 if (passes > 0 || !(flags & FSYNC_WAIT)) 515 (void) bawrite(bp); 516 else if ((error = bwrite(bp)) != 0) 517 return (error); 518 /* 519 * Since we unlocked during the I/O, we need 520 * to start from a known point. 521 */ 522 mutex_enter(&bufcache_lock); 523 nbp = LIST_FIRST(&vp->v_dirtyblkhd); 524 } 525 mutex_exit(&bufcache_lock); 526 if (skipmeta) { 527 skipmeta = 0; 528 goto loop; 529 } 530 531 if (flags & FSYNC_WAIT) { 532 mutex_enter(&vp->v_interlock); 533 while (vp->v_numoutput) { 534 cv_wait(&vp->v_cv, &vp->v_interlock); 535 } 536 mutex_exit(&vp->v_interlock); 537 538 /* 539 * Ensure that any filesystem metadata associated 540 * with the vnode has been written. 541 */ 542 if ((error = softdep_sync_metadata(vp)) != 0) 543 return (error); 544 545 if (!LIST_EMPTY(&vp->v_dirtyblkhd)) { 546 /* 547 * Block devices associated with filesystems may 548 * have new I/O requests posted for them even if 549 * the vnode is locked, so no amount of trying will 550 * get them clean. Thus we give block devices a 551 * good effort, then just give up. For all other file 552 * types, go around and try again until it is clean. 553 */ 554 if (passes > 0) { 555 passes--; 556 goto loop; 557 } 558 #ifdef DIAGNOSTIC 559 if (vp->v_type != VBLK) 560 vprint("ffs_fsync: dirty", vp); 561 #endif 562 } 563 } 564 565 if (inodedeps_only) 566 waitfor = 0; 567 else 568 waitfor = (flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 569 570 if (vp->v_tag == VT_UFS) 571 error = ffs_update(vp, NULL, NULL, waitfor); 572 else { 573 KASSERT(vp->v_type == VBLK); 574 KASSERT((flags & FSYNC_VFS) != 0); 575 } 576 577 if (error == 0 && flags & FSYNC_CACHE) { 578 int i = 0; 579 if ((flags & FSYNC_VFS) == 0) 580 vp = VTOI(vp)->i_devvp; 581 VOP_IOCTL(vp, DIOCCACHESYNC, &i, FWRITE, curlwp->l_cred); 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 /* Not supported for UFS1 file systems. */ 810 if (fs->fs_magic == FS_UFS1_MAGIC) 811 return (EOPNOTSUPP); 812 813 /* XXX Not implemented for UFS2 file systems. */ 814 return (EOPNOTSUPP); 815 } 816 817 int 818 ffs_deleteextattr(void *v) 819 { 820 struct vop_deleteextattr_args /* { 821 struct vnode *a_vp; 822 int a_attrnamespace; 823 kauth_cred_t a_cred; 824 struct proc *a_p; 825 } */ *ap = v; 826 struct vnode *vp = ap->a_vp; 827 struct inode *ip = VTOI(vp); 828 struct fs *fs = ip->i_fs; 829 830 if (fs->fs_magic == FS_UFS1_MAGIC) { 831 #ifdef UFS_EXTATTR 832 int error; 833 834 fstrans_start(vp->v_mount, FSTRANS_SHARED); 835 error = ufs_deleteextattr(ap); 836 fstrans_done(vp->v_mount); 837 return error; 838 #else 839 return (EOPNOTSUPP); 840 #endif 841 } 842 843 /* XXX Not implemented for UFS2 file systems. */ 844 return (EOPNOTSUPP); 845 } 846 847 /* 848 * Lock the node. 849 */ 850 int 851 ffs_lock(void *v) 852 { 853 struct vop_lock_args /* { 854 struct vnode *a_vp; 855 int a_flags; 856 } */ *ap = v; 857 struct vnode *vp = ap->a_vp; 858 struct mount *mp = vp->v_mount; 859 struct vnlock *lkp; 860 int flags = ap->a_flags; 861 int result; 862 863 if ((flags & LK_INTERLOCK) != 0) { 864 mutex_exit(&vp->v_interlock); 865 flags &= ~LK_INTERLOCK; 866 } 867 868 /* 869 * Fake lock during file system suspension. 870 */ 871 if ((vp->v_type == VREG || vp->v_type == VDIR) && 872 fstrans_is_owner(mp) && 873 fstrans_getstate(mp) == FSTRANS_SUSPENDING) { 874 return 0; 875 } 876 877 for (;;) { 878 lkp = vp->v_vnlock; 879 result = vlockmgr(lkp, flags); 880 if (lkp == vp->v_vnlock || result != 0) 881 return result; 882 /* 883 * Apparent success, except that the vnode mutated between 884 * snapshot file vnode and regular file vnode while this 885 * thread slept. The lock currently held is not the right 886 * lock. Release it, and try to get the new lock. 887 */ 888 (void) vlockmgr(lkp, LK_RELEASE); 889 } 890 } 891 892 /* 893 * Unlock the node. 894 */ 895 int 896 ffs_unlock(void *v) 897 { 898 struct vop_unlock_args /* { 899 struct vnode *a_vp; 900 int a_flags; 901 } */ *ap = v; 902 struct vnode *vp = ap->a_vp; 903 struct mount *mp = vp->v_mount; 904 905 KASSERT(ap->a_flags == 0); 906 907 /* 908 * Fake unlock during file system suspension. 909 */ 910 if ((vp->v_type == VREG || vp->v_type == VDIR) && 911 fstrans_is_owner(mp) && 912 fstrans_getstate(mp) == FSTRANS_SUSPENDING) { 913 return 0; 914 } 915 return (vlockmgr(vp->v_vnlock, LK_RELEASE)); 916 } 917 918 /* 919 * Return whether or not the node is locked. 920 */ 921 int 922 ffs_islocked(void *v) 923 { 924 struct vop_islocked_args /* { 925 struct vnode *a_vp; 926 } */ *ap = v; 927 struct vnode *vp = ap->a_vp; 928 929 return (vlockstatus(vp->v_vnlock)); 930 } 931
Indexes created Wed Oct 22 13:09:56 GMT 2025