Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/ufs/ffs/ffs_vnops.c
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1 /* $NetBSD: ffs_vnops.c,v 1.66 2003/11/15 01:19:38 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)ffs_vnops.c 8.15 (Berkeley) 5/14/95 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: ffs_vnops.c,v 1.66 2003/11/15 01:19:38 thorpej Exp $"); 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/resourcevar.h> 40 #include <sys/kernel.h> 41 #include <sys/file.h> 42 #include <sys/stat.h> 43 #include <sys/buf.h> 44 #include <sys/event.h> 45 #include <sys/proc.h> 46 #include <sys/mount.h> 47 #include <sys/vnode.h> 48 #include <sys/pool.h> 49 #include <sys/signalvar.h> 50 51 #include <miscfs/fifofs/fifo.h> 52 #include <miscfs/genfs/genfs.h> 53 #include <miscfs/specfs/specdev.h> 54 55 #include <ufs/ufs/inode.h> 56 #include <ufs/ufs/dir.h> 57 #include <ufs/ufs/ufs_extern.h> 58 #include <ufs/ufs/ufsmount.h> 59 60 #include <ufs/ffs/fs.h> 61 #include <ufs/ffs/ffs_extern.h> 62 63 #include <uvm/uvm.h> 64 65 static int ffs_full_fsync __P((void *)); 66 67 /* Global vfs data structures for ufs. */ 68 int (**ffs_vnodeop_p) __P((void *)); 69 const struct vnodeopv_entry_desc ffs_vnodeop_entries[] = { 70 { &vop_default_desc, vn_default_error }, 71 { &vop_lookup_desc, ufs_lookup }, /* lookup */ 72 { &vop_create_desc, ufs_create }, /* create */ 73 { &vop_whiteout_desc, ufs_whiteout }, /* whiteout */ 74 { &vop_mknod_desc, ufs_mknod }, /* mknod */ 75 { &vop_open_desc, ufs_open }, /* open */ 76 { &vop_close_desc, ufs_close }, /* close */ 77 { &vop_access_desc, ufs_access }, /* access */ 78 { &vop_getattr_desc, ufs_getattr }, /* getattr */ 79 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 80 { &vop_read_desc, ffs_read }, /* read */ 81 { &vop_write_desc, ffs_write }, /* write */ 82 { &vop_lease_desc, ufs_lease_check }, /* lease */ 83 { &vop_ioctl_desc, ufs_ioctl }, /* ioctl */ 84 { &vop_fcntl_desc, ufs_fcntl }, /* fcntl */ 85 { &vop_poll_desc, ufs_poll }, /* poll */ 86 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ 87 { &vop_revoke_desc, ufs_revoke }, /* revoke */ 88 { &vop_mmap_desc, ufs_mmap }, /* mmap */ 89 { &vop_fsync_desc, ffs_fsync }, /* fsync */ 90 { &vop_seek_desc, ufs_seek }, /* seek */ 91 { &vop_remove_desc, ufs_remove }, /* remove */ 92 { &vop_link_desc, ufs_link }, /* link */ 93 { &vop_rename_desc, ufs_rename }, /* rename */ 94 { &vop_mkdir_desc, ufs_mkdir }, /* mkdir */ 95 { &vop_rmdir_desc, ufs_rmdir }, /* rmdir */ 96 { &vop_symlink_desc, ufs_symlink }, /* symlink */ 97 { &vop_readdir_desc, ufs_readdir }, /* readdir */ 98 { &vop_readlink_desc, ufs_readlink }, /* readlink */ 99 { &vop_abortop_desc, ufs_abortop }, /* abortop */ 100 { &vop_inactive_desc, ufs_inactive }, /* inactive */ 101 { &vop_reclaim_desc, ffs_reclaim }, /* reclaim */ 102 { &vop_lock_desc, ufs_lock }, /* lock */ 103 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 104 { &vop_bmap_desc, ufs_bmap }, /* bmap */ 105 { &vop_strategy_desc, ufs_strategy }, /* strategy */ 106 { &vop_print_desc, ufs_print }, /* print */ 107 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 108 { &vop_pathconf_desc, ufs_pathconf }, /* pathconf */ 109 { &vop_advlock_desc, ufs_advlock }, /* advlock */ 110 { &vop_blkatoff_desc, ffs_blkatoff }, /* blkatoff */ 111 { &vop_valloc_desc, ffs_valloc }, /* valloc */ 112 { &vop_balloc_desc, ffs_balloc }, /* balloc */ 113 { &vop_reallocblks_desc, ffs_reallocblks }, /* reallocblks */ 114 { &vop_vfree_desc, ffs_vfree }, /* vfree */ 115 { &vop_truncate_desc, ffs_truncate }, /* truncate */ 116 { &vop_update_desc, ffs_update }, /* update */ 117 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 118 { &vop_getpages_desc, ffs_getpages }, /* getpages */ 119 { &vop_putpages_desc, ffs_putpages }, /* putpages */ 120 { NULL, NULL } 121 }; 122 const struct vnodeopv_desc ffs_vnodeop_opv_desc = 123 { &ffs_vnodeop_p, ffs_vnodeop_entries }; 124 125 int (**ffs_specop_p) __P((void *)); 126 const struct vnodeopv_entry_desc ffs_specop_entries[] = { 127 { &vop_default_desc, vn_default_error }, 128 { &vop_lookup_desc, spec_lookup }, /* lookup */ 129 { &vop_create_desc, spec_create }, /* create */ 130 { &vop_mknod_desc, spec_mknod }, /* mknod */ 131 { &vop_open_desc, spec_open }, /* open */ 132 { &vop_close_desc, ufsspec_close }, /* close */ 133 { &vop_access_desc, ufs_access }, /* access */ 134 { &vop_getattr_desc, ufs_getattr }, /* getattr */ 135 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 136 { &vop_read_desc, ufsspec_read }, /* read */ 137 { &vop_write_desc, ufsspec_write }, /* write */ 138 { &vop_lease_desc, spec_lease_check }, /* lease */ 139 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 140 { &vop_fcntl_desc, ufs_fcntl }, /* fcntl */ 141 { &vop_poll_desc, spec_poll }, /* poll */ 142 { &vop_kqfilter_desc, spec_kqfilter }, /* kqfilter */ 143 { &vop_revoke_desc, spec_revoke }, /* revoke */ 144 { &vop_mmap_desc, spec_mmap }, /* mmap */ 145 { &vop_fsync_desc, ffs_fsync }, /* fsync */ 146 { &vop_seek_desc, spec_seek }, /* seek */ 147 { &vop_remove_desc, spec_remove }, /* remove */ 148 { &vop_link_desc, spec_link }, /* link */ 149 { &vop_rename_desc, spec_rename }, /* rename */ 150 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 151 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 152 { &vop_symlink_desc, spec_symlink }, /* symlink */ 153 { &vop_readdir_desc, spec_readdir }, /* readdir */ 154 { &vop_readlink_desc, spec_readlink }, /* readlink */ 155 { &vop_abortop_desc, spec_abortop }, /* abortop */ 156 { &vop_inactive_desc, ufs_inactive }, /* inactive */ 157 { &vop_reclaim_desc, ffs_reclaim }, /* reclaim */ 158 { &vop_lock_desc, ufs_lock }, /* lock */ 159 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 160 { &vop_bmap_desc, spec_bmap }, /* bmap */ 161 { &vop_strategy_desc, spec_strategy }, /* strategy */ 162 { &vop_print_desc, ufs_print }, /* print */ 163 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 164 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 165 { &vop_advlock_desc, spec_advlock }, /* advlock */ 166 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 167 { &vop_valloc_desc, spec_valloc }, /* valloc */ 168 { &vop_reallocblks_desc, spec_reallocblks }, /* reallocblks */ 169 { &vop_vfree_desc, ffs_vfree }, /* vfree */ 170 { &vop_truncate_desc, spec_truncate }, /* truncate */ 171 { &vop_update_desc, ffs_update }, /* update */ 172 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 173 { &vop_getpages_desc, spec_getpages }, /* getpages */ 174 { &vop_putpages_desc, spec_putpages }, /* putpages */ 175 { NULL, NULL } 176 }; 177 const struct vnodeopv_desc ffs_specop_opv_desc = 178 { &ffs_specop_p, ffs_specop_entries }; 179 180 int (**ffs_fifoop_p) __P((void *)); 181 const struct vnodeopv_entry_desc ffs_fifoop_entries[] = { 182 { &vop_default_desc, vn_default_error }, 183 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 184 { &vop_create_desc, fifo_create }, /* create */ 185 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 186 { &vop_open_desc, fifo_open }, /* open */ 187 { &vop_close_desc, ufsfifo_close }, /* close */ 188 { &vop_access_desc, ufs_access }, /* access */ 189 { &vop_getattr_desc, ufs_getattr }, /* getattr */ 190 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 191 { &vop_read_desc, ufsfifo_read }, /* read */ 192 { &vop_write_desc, ufsfifo_write }, /* write */ 193 { &vop_lease_desc, fifo_lease_check }, /* lease */ 194 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 195 { &vop_fcntl_desc, ufs_fcntl }, /* fcntl */ 196 { &vop_poll_desc, fifo_poll }, /* poll */ 197 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 198 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 199 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 200 { &vop_fsync_desc, ffs_fsync }, /* fsync */ 201 { &vop_seek_desc, fifo_seek }, /* seek */ 202 { &vop_remove_desc, fifo_remove }, /* remove */ 203 { &vop_link_desc, fifo_link }, /* link */ 204 { &vop_rename_desc, fifo_rename }, /* rename */ 205 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 206 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 207 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 208 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 209 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 210 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 211 { &vop_inactive_desc, ufs_inactive }, /* inactive */ 212 { &vop_reclaim_desc, ffs_reclaim }, /* reclaim */ 213 { &vop_lock_desc, ufs_lock }, /* lock */ 214 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 215 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 216 { &vop_strategy_desc, fifo_strategy }, /* strategy */ 217 { &vop_print_desc, ufs_print }, /* print */ 218 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 219 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 220 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 221 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 222 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 223 { &vop_reallocblks_desc, fifo_reallocblks }, /* reallocblks */ 224 { &vop_vfree_desc, ffs_vfree }, /* vfree */ 225 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 226 { &vop_update_desc, ffs_update }, /* update */ 227 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 228 { &vop_putpages_desc, fifo_putpages }, /* putpages */ 229 { NULL, NULL } 230 }; 231 const struct vnodeopv_desc ffs_fifoop_opv_desc = 232 { &ffs_fifoop_p, ffs_fifoop_entries }; 233 234 #include <ufs/ufs/ufs_readwrite.c> 235 236 int 237 ffs_fsync(v) 238 void *v; 239 { 240 struct vop_fsync_args /* { 241 struct vnode *a_vp; 242 struct ucred *a_cred; 243 int a_flags; 244 off_t a_offlo; 245 off_t a_offhi; 246 struct proc *a_p; 247 } */ *ap = v; 248 struct buf *bp; 249 int s, num, error, i; 250 struct indir ia[NIADDR + 1]; 251 int bsize; 252 daddr_t blk_high; 253 struct vnode *vp; 254 255 /* 256 * XXX no easy way to sync a range in a file with softdep. 257 */ 258 if ((ap->a_offlo == 0 && ap->a_offhi == 0) || DOINGSOFTDEP(ap->a_vp) || 259 (ap->a_vp->v_type != VREG)) 260 return ffs_full_fsync(v); 261 262 vp = ap->a_vp; 263 264 bsize = ap->a_vp->v_mount->mnt_stat.f_iosize; 265 blk_high = ap->a_offhi / bsize; 266 if (ap->a_offhi % bsize != 0) 267 blk_high++; 268 269 /* 270 * First, flush all pages in range. 271 */ 272 273 simple_lock(&vp->v_interlock); 274 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 275 round_page(ap->a_offhi), PGO_CLEANIT | 276 ((ap->a_flags & FSYNC_WAIT) ? PGO_SYNCIO : 0)); 277 if (error) { 278 return error; 279 } 280 281 /* 282 * Then, flush indirect blocks. 283 */ 284 285 s = splbio(); 286 if (blk_high >= NDADDR) { 287 error = ufs_getlbns(vp, blk_high, ia, &num); 288 if (error) { 289 splx(s); 290 return error; 291 } 292 for (i = 0; i < num; i++) { 293 bp = incore(vp, ia[i].in_lbn); 294 if (bp != NULL) { 295 simple_lock(&bp->b_interlock); 296 if (!(bp->b_flags & B_BUSY) && (bp->b_flags & B_DELWRI)) { 297 bp->b_flags |= B_BUSY | B_VFLUSH; 298 simple_unlock(&bp->b_interlock); 299 splx(s); 300 bawrite(bp); 301 s = splbio(); 302 } else { 303 simple_unlock(&bp->b_interlock); 304 } 305 } 306 } 307 } 308 309 if (ap->a_flags & FSYNC_WAIT) { 310 simple_lock(&global_v_numoutput_slock); 311 while (vp->v_numoutput > 0) { 312 vp->v_flag |= VBWAIT; 313 ltsleep(&vp->v_numoutput, PRIBIO + 1, "fsync_range", 0, 314 &global_v_numoutput_slock); 315 } 316 simple_unlock(&global_v_numoutput_slock); 317 } 318 splx(s); 319 320 return (VOP_UPDATE(vp, NULL, NULL, 321 ((ap->a_flags & (FSYNC_WAIT | FSYNC_DATAONLY)) == FSYNC_WAIT) 322 ? UPDATE_WAIT : 0)); 323 } 324 325 /* 326 * Synch an open file. 327 */ 328 /* ARGSUSED */ 329 static int 330 ffs_full_fsync(v) 331 void *v; 332 { 333 struct vop_fsync_args /* { 334 struct vnode *a_vp; 335 struct ucred *a_cred; 336 int a_flags; 337 off_t a_offlo; 338 off_t a_offhi; 339 struct proc *a_p; 340 } */ *ap = v; 341 struct vnode *vp = ap->a_vp; 342 struct buf *bp, *nbp; 343 int s, error, passes, skipmeta, inodedeps_only, waitfor; 344 345 if (vp->v_type == VBLK && 346 vp->v_specmountpoint != NULL && 347 (vp->v_specmountpoint->mnt_flag & MNT_SOFTDEP)) 348 softdep_fsync_mountdev(vp); 349 350 inodedeps_only = DOINGSOFTDEP(vp) && (ap->a_flags & FSYNC_RECLAIM) 351 && vp->v_uobj.uo_npages == 0 && LIST_EMPTY(&vp->v_dirtyblkhd); 352 353 /* 354 * Flush all dirty data associated with a vnode. 355 */ 356 357 if (vp->v_type == VREG) { 358 simple_lock(&vp->v_interlock); 359 error = VOP_PUTPAGES(vp, 0, 0, PGO_ALLPAGES | PGO_CLEANIT | 360 ((ap->a_flags & FSYNC_WAIT) ? PGO_SYNCIO : 0)); 361 if (error) { 362 return error; 363 } 364 } 365 366 passes = NIADDR + 1; 367 skipmeta = 0; 368 if (ap->a_flags & FSYNC_WAIT) 369 skipmeta = 1; 370 s = splbio(); 371 372 loop: 373 LIST_FOREACH(bp, &vp->v_dirtyblkhd, b_vnbufs) 374 bp->b_flags &= ~B_SCANNED; 375 for (bp = LIST_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { 376 nbp = LIST_NEXT(bp, b_vnbufs); 377 simple_lock(&bp->b_interlock); 378 if (bp->b_flags & (B_BUSY | B_SCANNED)) { 379 simple_unlock(&bp->b_interlock); 380 continue; 381 } 382 if ((bp->b_flags & B_DELWRI) == 0) 383 panic("ffs_fsync: not dirty"); 384 if (skipmeta && bp->b_lblkno < 0) { 385 simple_unlock(&bp->b_interlock); 386 continue; 387 } 388 simple_unlock(&bp->b_interlock); 389 bp->b_flags |= B_BUSY | B_VFLUSH | B_SCANNED; 390 splx(s); 391 /* 392 * On our final pass through, do all I/O synchronously 393 * so that we can find out if our flush is failing 394 * because of write errors. 395 */ 396 if (passes > 0 || !(ap->a_flags & FSYNC_WAIT)) 397 (void) bawrite(bp); 398 else if ((error = bwrite(bp)) != 0) 399 return (error); 400 s = splbio(); 401 /* 402 * Since we may have slept during the I/O, we need 403 * to start from a known point. 404 */ 405 nbp = LIST_FIRST(&vp->v_dirtyblkhd); 406 } 407 if (skipmeta) { 408 skipmeta = 0; 409 goto loop; 410 } 411 if (ap->a_flags & FSYNC_WAIT) { 412 simple_lock(&global_v_numoutput_slock); 413 while (vp->v_numoutput) { 414 vp->v_flag |= VBWAIT; 415 (void) ltsleep(&vp->v_numoutput, PRIBIO + 1, 416 "ffsfsync", 0, &global_v_numoutput_slock); 417 } 418 simple_unlock(&global_v_numoutput_slock); 419 splx(s); 420 421 /* 422 * Ensure that any filesystem metadata associated 423 * with the vnode has been written. 424 */ 425 if ((error = softdep_sync_metadata(ap)) != 0) 426 return (error); 427 428 s = splbio(); 429 if (!LIST_EMPTY(&vp->v_dirtyblkhd)) { 430 /* 431 * Block devices associated with filesystems may 432 * have new I/O requests posted for them even if 433 * the vnode is locked, so no amount of trying will 434 * get them clean. Thus we give block devices a 435 * good effort, then just give up. For all other file 436 * types, go around and try again until it is clean. 437 */ 438 if (passes > 0) { 439 passes--; 440 goto loop; 441 } 442 #ifdef DIAGNOSTIC 443 if (vp->v_type != VBLK) 444 vprint("ffs_fsync: dirty", vp); 445 #endif 446 } 447 } 448 splx(s); 449 450 if (inodedeps_only) 451 waitfor = 0; 452 else 453 waitfor = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 454 return (VOP_UPDATE(vp, NULL, NULL, waitfor)); 455 } 456 457 /* 458 * Reclaim an inode so that it can be used for other purposes. 459 */ 460 int 461 ffs_reclaim(v) 462 void *v; 463 { 464 struct vop_reclaim_args /* { 465 struct vnode *a_vp; 466 struct proc *a_p; 467 } */ *ap = v; 468 struct vnode *vp = ap->a_vp; 469 struct inode *ip = VTOI(vp); 470 struct ufsmount *ump = ip->i_ump; 471 int error; 472 473 if ((error = ufs_reclaim(vp, ap->a_p)) != 0) 474 return (error); 475 if (ip->i_din.ffs1_din != NULL) { 476 if (ump->um_fstype == UFS1) 477 pool_put(&ffs_dinode1_pool, ip->i_din.ffs1_din); 478 else 479 pool_put(&ffs_dinode2_pool, ip->i_din.ffs2_din); 480 } 481 /* 482 * XXX MFS ends up here, too, to free an inode. Should we create 483 * XXX a separate pool for MFS inodes? 484 */ 485 pool_put(&ffs_inode_pool, vp->v_data); 486 vp->v_data = NULL; 487 return (0); 488 } 489 490 int 491 ffs_getpages(void *v) 492 { 493 struct vop_getpages_args /* { 494 struct vnode *a_vp; 495 voff_t a_offset; 496 struct vm_page **a_m; 497 int *a_count; 498 int a_centeridx; 499 vm_prot_t a_access_type; 500 int a_advice; 501 int a_flags; 502 } */ *ap = v; 503 struct vnode *vp = ap->a_vp; 504 struct inode *ip = VTOI(vp); 505 struct fs *fs = ip->i_fs; 506 507 /* 508 * don't allow a softdep write to create pages for only part of a block. 509 * the dependency tracking requires that all pages be in memory for 510 * a block involved in a dependency. 511 */ 512 513 if (ap->a_flags & PGO_OVERWRITE && 514 (blkoff(fs, ap->a_offset) != 0 || 515 blkoff(fs, *ap->a_count << PAGE_SHIFT) != 0) && 516 DOINGSOFTDEP(ap->a_vp)) { 517 if ((ap->a_flags & PGO_LOCKED) == 0) { 518 simple_unlock(&vp->v_interlock); 519 } 520 return EINVAL; 521 } 522 return genfs_getpages(v); 523 } 524 525 int 526 ffs_putpages(void *v) 527 { 528 struct vop_putpages_args /* { 529 struct vnode *a_vp; 530 voff_t a_offlo; 531 voff_t a_offhi; 532 int a_flags; 533 } */ *ap = v; 534 struct vnode *vp = ap->a_vp; 535 struct uvm_object *uobj = &vp->v_uobj; 536 struct inode *ip = VTOI(vp); 537 struct fs *fs = ip->i_fs; 538 struct vm_page *pg; 539 off_t off; 540 541 if (!DOINGSOFTDEP(vp) || (ap->a_flags & PGO_CLEANIT) == 0) { 542 return genfs_putpages(v); 543 } 544 545 /* 546 * for softdep files, force the pages in a block to be written together. 547 * if we're the pagedaemon and we would have to wait for other pages, 548 * just fail the request. the pagedaemon will pick a different page. 549 */ 550 551 ap->a_offlo &= ~fs->fs_qbmask; 552 ap->a_offhi = blkroundup(fs, ap->a_offhi); 553 if (curproc == uvm.pagedaemon_proc) { 554 for (off = ap->a_offlo; off < ap->a_offhi; off += PAGE_SIZE) { 555 pg = uvm_pagelookup(uobj, off); 556 557 /* 558 * we only have missing pages here because the 559 * calculation of offhi above doesn't account for 560 * fragments. so once we see one missing page, 561 * the rest should be missing as well, but we'll 562 * check for the rest just to be paranoid. 563 */ 564 565 if (pg == NULL) { 566 continue; 567 } 568 if (pg->flags & PG_BUSY) { 569 simple_unlock(&uobj->vmobjlock); 570 return EBUSY; 571 } 572 } 573 } 574 return genfs_putpages(v); 575 } 576 577 /* 578 * Return the last logical file offset that should be written for this file 579 * if we're doing a write that ends at "size". 580 */ 581 582 void 583 ffs_gop_size(struct vnode *vp, off_t size, off_t *eobp, int flags) 584 { 585 struct inode *ip = VTOI(vp); 586 struct fs *fs = ip->i_fs; 587 daddr_t olbn, nlbn; 588 589 KASSERT(flags & (GOP_SIZE_READ | GOP_SIZE_WRITE)); 590 KASSERT((flags & (GOP_SIZE_READ | GOP_SIZE_WRITE)) 591 != (GOP_SIZE_READ | GOP_SIZE_WRITE)); 592 593 olbn = lblkno(fs, ip->i_size); 594 nlbn = lblkno(fs, size); 595 if (nlbn < NDADDR && olbn <= nlbn) { 596 *eobp = fragroundup(fs, size); 597 } else { 598 *eobp = blkroundup(fs, size); 599 } 600 }
Cache object: d643411337763551dab47f8f155f8814
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