1 /* $NetBSD: ffs_vnops.c,v 1.51 2002/11/01 21:11:43 kristerw 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)ffs_vnops.c 8.15 (Berkeley) 5/14/95 36 */ 37 38 #include <sys/cdefs.h> 39 __KERNEL_RCSID(0, "$NetBSD: ffs_vnops.c,v 1.51 2002/11/01 21:11:43 kristerw Exp $"); 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/resourcevar.h> 44 #include <sys/kernel.h> 45 #include <sys/file.h> 46 #include <sys/stat.h> 47 #include <sys/buf.h> 48 #include <sys/event.h> 49 #include <sys/proc.h> 50 #include <sys/mount.h> 51 #include <sys/vnode.h> 52 #include <sys/pool.h> 53 #include <sys/signalvar.h> 54 55 #include <miscfs/fifofs/fifo.h> 56 #include <miscfs/genfs/genfs.h> 57 #include <miscfs/specfs/specdev.h> 58 59 #include <ufs/ufs/inode.h> 60 #include <ufs/ufs/dir.h> 61 #include <ufs/ufs/ufs_extern.h> 62 #include <ufs/ufs/ufsmount.h> 63 64 #include <ufs/ffs/fs.h> 65 #include <ufs/ffs/ffs_extern.h> 66 67 #include <uvm/uvm.h> 68 69 static int ffs_full_fsync __P((void *)); 70 71 /* Global vfs data structures for ufs. */ 72 int (**ffs_vnodeop_p) __P((void *)); 73 const struct vnodeopv_entry_desc ffs_vnodeop_entries[] = { 74 { &vop_default_desc, vn_default_error }, 75 { &vop_lookup_desc, ufs_lookup }, /* lookup */ 76 { &vop_create_desc, ufs_create }, /* create */ 77 { &vop_whiteout_desc, ufs_whiteout }, /* whiteout */ 78 { &vop_mknod_desc, ufs_mknod }, /* mknod */ 79 { &vop_open_desc, ufs_open }, /* open */ 80 { &vop_close_desc, ufs_close }, /* close */ 81 { &vop_access_desc, ufs_access }, /* access */ 82 { &vop_getattr_desc, ufs_getattr }, /* getattr */ 83 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 84 { &vop_read_desc, ffs_read }, /* read */ 85 { &vop_write_desc, ffs_write }, /* write */ 86 { &vop_lease_desc, ufs_lease_check }, /* lease */ 87 { &vop_ioctl_desc, ufs_ioctl }, /* ioctl */ 88 { &vop_fcntl_desc, ufs_fcntl }, /* fcntl */ 89 { &vop_poll_desc, ufs_poll }, /* poll */ 90 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ 91 { &vop_revoke_desc, ufs_revoke }, /* revoke */ 92 { &vop_mmap_desc, ufs_mmap }, /* mmap */ 93 { &vop_fsync_desc, ffs_fsync }, /* fsync */ 94 { &vop_seek_desc, ufs_seek }, /* seek */ 95 { &vop_remove_desc, ufs_remove }, /* remove */ 96 { &vop_link_desc, ufs_link }, /* link */ 97 { &vop_rename_desc, ufs_rename }, /* rename */ 98 { &vop_mkdir_desc, ufs_mkdir }, /* mkdir */ 99 { &vop_rmdir_desc, ufs_rmdir }, /* rmdir */ 100 { &vop_symlink_desc, ufs_symlink }, /* symlink */ 101 { &vop_readdir_desc, ufs_readdir }, /* readdir */ 102 { &vop_readlink_desc, ufs_readlink }, /* readlink */ 103 { &vop_abortop_desc, ufs_abortop }, /* abortop */ 104 { &vop_inactive_desc, ufs_inactive }, /* inactive */ 105 { &vop_reclaim_desc, ffs_reclaim }, /* reclaim */ 106 { &vop_lock_desc, ufs_lock }, /* lock */ 107 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 108 { &vop_bmap_desc, ufs_bmap }, /* bmap */ 109 { &vop_strategy_desc, ufs_strategy }, /* strategy */ 110 { &vop_print_desc, ufs_print }, /* print */ 111 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 112 { &vop_pathconf_desc, ufs_pathconf }, /* pathconf */ 113 { &vop_advlock_desc, ufs_advlock }, /* advlock */ 114 { &vop_blkatoff_desc, ffs_blkatoff }, /* blkatoff */ 115 { &vop_valloc_desc, ffs_valloc }, /* valloc */ 116 { &vop_balloc_desc, ffs_balloc }, /* balloc */ 117 { &vop_reallocblks_desc, ffs_reallocblks }, /* reallocblks */ 118 { &vop_vfree_desc, ffs_vfree }, /* vfree */ 119 { &vop_truncate_desc, ffs_truncate }, /* truncate */ 120 { &vop_update_desc, ffs_update }, /* update */ 121 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 122 { &vop_getpages_desc, ffs_getpages }, /* getpages */ 123 { &vop_putpages_desc, ffs_putpages }, /* putpages */ 124 { NULL, NULL } 125 }; 126 const struct vnodeopv_desc ffs_vnodeop_opv_desc = 127 { &ffs_vnodeop_p, ffs_vnodeop_entries }; 128 129 int (**ffs_specop_p) __P((void *)); 130 const struct vnodeopv_entry_desc ffs_specop_entries[] = { 131 { &vop_default_desc, vn_default_error }, 132 { &vop_lookup_desc, spec_lookup }, /* lookup */ 133 { &vop_create_desc, spec_create }, /* create */ 134 { &vop_mknod_desc, spec_mknod }, /* mknod */ 135 { &vop_open_desc, spec_open }, /* open */ 136 { &vop_close_desc, ufsspec_close }, /* close */ 137 { &vop_access_desc, ufs_access }, /* access */ 138 { &vop_getattr_desc, ufs_getattr }, /* getattr */ 139 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 140 { &vop_read_desc, ufsspec_read }, /* read */ 141 { &vop_write_desc, ufsspec_write }, /* write */ 142 { &vop_lease_desc, spec_lease_check }, /* lease */ 143 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 144 { &vop_fcntl_desc, ufs_fcntl }, /* fcntl */ 145 { &vop_poll_desc, spec_poll }, /* poll */ 146 { &vop_kqfilter_desc, spec_kqfilter }, /* kqfilter */ 147 { &vop_revoke_desc, spec_revoke }, /* revoke */ 148 { &vop_mmap_desc, spec_mmap }, /* mmap */ 149 { &vop_fsync_desc, ffs_fsync }, /* fsync */ 150 { &vop_seek_desc, spec_seek }, /* seek */ 151 { &vop_remove_desc, spec_remove }, /* remove */ 152 { &vop_link_desc, spec_link }, /* link */ 153 { &vop_rename_desc, spec_rename }, /* rename */ 154 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 155 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 156 { &vop_symlink_desc, spec_symlink }, /* symlink */ 157 { &vop_readdir_desc, spec_readdir }, /* readdir */ 158 { &vop_readlink_desc, spec_readlink }, /* readlink */ 159 { &vop_abortop_desc, spec_abortop }, /* abortop */ 160 { &vop_inactive_desc, ufs_inactive }, /* inactive */ 161 { &vop_reclaim_desc, ffs_reclaim }, /* reclaim */ 162 { &vop_lock_desc, ufs_lock }, /* lock */ 163 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 164 { &vop_bmap_desc, spec_bmap }, /* bmap */ 165 { &vop_strategy_desc, spec_strategy }, /* strategy */ 166 { &vop_print_desc, ufs_print }, /* print */ 167 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 168 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 169 { &vop_advlock_desc, spec_advlock }, /* advlock */ 170 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 171 { &vop_valloc_desc, spec_valloc }, /* valloc */ 172 { &vop_reallocblks_desc, spec_reallocblks }, /* reallocblks */ 173 { &vop_vfree_desc, ffs_vfree }, /* vfree */ 174 { &vop_truncate_desc, spec_truncate }, /* truncate */ 175 { &vop_update_desc, ffs_update }, /* update */ 176 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 177 { &vop_getpages_desc, spec_getpages }, /* getpages */ 178 { &vop_putpages_desc, spec_putpages }, /* putpages */ 179 { NULL, NULL } 180 }; 181 const struct vnodeopv_desc ffs_specop_opv_desc = 182 { &ffs_specop_p, ffs_specop_entries }; 183 184 int (**ffs_fifoop_p) __P((void *)); 185 const struct vnodeopv_entry_desc ffs_fifoop_entries[] = { 186 { &vop_default_desc, vn_default_error }, 187 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 188 { &vop_create_desc, fifo_create }, /* create */ 189 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 190 { &vop_open_desc, fifo_open }, /* open */ 191 { &vop_close_desc, ufsfifo_close }, /* close */ 192 { &vop_access_desc, ufs_access }, /* access */ 193 { &vop_getattr_desc, ufs_getattr }, /* getattr */ 194 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 195 { &vop_read_desc, ufsfifo_read }, /* read */ 196 { &vop_write_desc, ufsfifo_write }, /* write */ 197 { &vop_lease_desc, fifo_lease_check }, /* lease */ 198 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 199 { &vop_fcntl_desc, ufs_fcntl }, /* fcntl */ 200 { &vop_poll_desc, fifo_poll }, /* poll */ 201 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 202 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 203 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 204 { &vop_fsync_desc, ffs_fsync }, /* fsync */ 205 { &vop_seek_desc, fifo_seek }, /* seek */ 206 { &vop_remove_desc, fifo_remove }, /* remove */ 207 { &vop_link_desc, fifo_link }, /* link */ 208 { &vop_rename_desc, fifo_rename }, /* rename */ 209 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 210 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 211 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 212 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 213 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 214 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 215 { &vop_inactive_desc, ufs_inactive }, /* inactive */ 216 { &vop_reclaim_desc, ffs_reclaim }, /* reclaim */ 217 { &vop_lock_desc, ufs_lock }, /* lock */ 218 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 219 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 220 { &vop_strategy_desc, fifo_strategy }, /* strategy */ 221 { &vop_print_desc, ufs_print }, /* print */ 222 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 223 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 224 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 225 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 226 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 227 { &vop_reallocblks_desc, fifo_reallocblks }, /* reallocblks */ 228 { &vop_vfree_desc, ffs_vfree }, /* vfree */ 229 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 230 { &vop_update_desc, ffs_update }, /* update */ 231 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 232 { &vop_putpages_desc, fifo_putpages }, /* putpages */ 233 { NULL, NULL } 234 }; 235 const struct vnodeopv_desc ffs_fifoop_opv_desc = 236 { &ffs_fifoop_p, ffs_fifoop_entries }; 237 238 #include <ufs/ufs/ufs_readwrite.c> 239 240 int 241 ffs_fsync(v) 242 void *v; 243 { 244 struct vop_fsync_args /* { 245 struct vnode *a_vp; 246 struct ucred *a_cred; 247 int a_flags; 248 off_t a_offlo; 249 off_t a_offhi; 250 struct proc *a_p; 251 } */ *ap = v; 252 struct buf *bp; 253 int s, num, error, i; 254 struct indir ia[NIADDR + 1]; 255 int bsize; 256 daddr_t blk_high; 257 struct vnode *vp; 258 259 /* 260 * XXX no easy way to sync a range in a file with softdep. 261 */ 262 if ((ap->a_offlo == 0 && ap->a_offhi == 0) || DOINGSOFTDEP(ap->a_vp)) 263 return ffs_full_fsync(v); 264 265 vp = ap->a_vp; 266 267 bsize = ap->a_vp->v_mount->mnt_stat.f_iosize; 268 blk_high = ap->a_offhi / bsize; 269 if (ap->a_offhi % bsize != 0) 270 blk_high++; 271 272 /* 273 * First, flush all pages in range. 274 */ 275 276 if (vp->v_type == VREG) { 277 simple_lock(&vp->v_interlock); 278 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 279 round_page(ap->a_offhi), PGO_CLEANIT|PGO_SYNCIO); 280 if (error) { 281 return error; 282 } 283 } 284 285 /* 286 * Then, flush indirect blocks. 287 */ 288 289 s = splbio(); 290 if (!(ap->a_flags & FSYNC_DATAONLY) && blk_high >= NDADDR) { 291 error = ufs_getlbns(vp, blk_high, ia, &num); 292 if (error) { 293 splx(s); 294 return error; 295 } 296 for (i = 0; i < num; i++) { 297 bp = incore(vp, ia[i].in_lbn); 298 if (bp != NULL && !(bp->b_flags & B_BUSY) && 299 (bp->b_flags & B_DELWRI)) { 300 bp->b_flags |= B_BUSY | B_VFLUSH; 301 splx(s); 302 bawrite(bp); 303 s = splbio(); 304 } 305 } 306 } 307 308 if (ap->a_flags & FSYNC_WAIT) { 309 while (vp->v_numoutput > 0) { 310 vp->v_flag |= VBWAIT; 311 tsleep(&vp->v_numoutput, PRIBIO + 1, "fsync_range", 0); 312 } 313 } 314 splx(s); 315 316 return (VOP_UPDATE(vp, NULL, NULL, 317 (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0)); 318 } 319 320 /* 321 * Synch an open file. 322 */ 323 /* ARGSUSED */ 324 static int 325 ffs_full_fsync(v) 326 void *v; 327 { 328 struct vop_fsync_args /* { 329 struct vnode *a_vp; 330 struct ucred *a_cred; 331 int a_flags; 332 off_t a_offlo; 333 off_t a_offhi; 334 struct proc *a_p; 335 } */ *ap = v; 336 struct vnode *vp = ap->a_vp; 337 struct buf *bp, *nbp; 338 int s, error, passes, skipmeta, inodedeps_only, waitfor; 339 340 if (vp->v_type == VBLK && 341 vp->v_specmountpoint != NULL && 342 (vp->v_specmountpoint->mnt_flag & MNT_SOFTDEP)) 343 softdep_fsync_mountdev(vp); 344 345 inodedeps_only = DOINGSOFTDEP(vp) && (ap->a_flags & FSYNC_RECLAIM) 346 && vp->v_uobj.uo_npages == 0 && LIST_EMPTY(&vp->v_dirtyblkhd); 347 348 /* 349 * Flush all dirty data associated with a vnode. 350 */ 351 352 if (vp->v_type == VREG) { 353 simple_lock(&vp->v_interlock); 354 error = VOP_PUTPAGES(vp, 0, 0, PGO_ALLPAGES | PGO_CLEANIT | 355 ((ap->a_flags & FSYNC_WAIT) ? PGO_SYNCIO : 0)); 356 if (error) { 357 return error; 358 } 359 } 360 361 passes = NIADDR + 1; 362 skipmeta = 0; 363 if (ap->a_flags & (FSYNC_DATAONLY|FSYNC_WAIT)) 364 skipmeta = 1; 365 s = splbio(); 366 367 loop: 368 LIST_FOREACH(bp, &vp->v_dirtyblkhd, b_vnbufs) 369 bp->b_flags &= ~B_SCANNED; 370 for (bp = LIST_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { 371 nbp = LIST_NEXT(bp, b_vnbufs); 372 if (bp->b_flags & (B_BUSY | B_SCANNED)) 373 continue; 374 if ((bp->b_flags & B_DELWRI) == 0) 375 panic("ffs_fsync: not dirty"); 376 if (skipmeta && bp->b_lblkno < 0) 377 continue; 378 bp->b_flags |= B_BUSY | B_VFLUSH | B_SCANNED; 379 splx(s); 380 /* 381 * On our final pass through, do all I/O synchronously 382 * so that we can find out if our flush is failing 383 * because of write errors. 384 */ 385 if (passes > 0 || !(ap->a_flags & FSYNC_WAIT)) 386 (void) bawrite(bp); 387 else if ((error = bwrite(bp)) != 0) 388 return (error); 389 s = splbio(); 390 /* 391 * Since we may have slept during the I/O, we need 392 * to start from a known point. 393 */ 394 nbp = LIST_FIRST(&vp->v_dirtyblkhd); 395 } 396 if (skipmeta && !(ap->a_flags & FSYNC_DATAONLY)) { 397 skipmeta = 0; 398 goto loop; 399 } 400 if (ap->a_flags & FSYNC_WAIT) { 401 while (vp->v_numoutput) { 402 vp->v_flag |= VBWAIT; 403 (void) tsleep(&vp->v_numoutput, PRIBIO + 1, 404 "ffsfsync", 0); 405 } 406 splx(s); 407 408 if (ap->a_flags & FSYNC_DATAONLY) 409 return (0); 410 411 /* 412 * Ensure that any filesystem metadata associated 413 * with the vnode has been written. 414 */ 415 if ((error = softdep_sync_metadata(ap)) != 0) 416 return (error); 417 418 s = splbio(); 419 if (!LIST_EMPTY(&vp->v_dirtyblkhd)) { 420 /* 421 * Block devices associated with filesystems may 422 * have new I/O requests posted for them even if 423 * the vnode is locked, so no amount of trying will 424 * get them clean. Thus we give block devices a 425 * good effort, then just give up. For all other file 426 * types, go around and try again until it is clean. 427 */ 428 if (passes > 0) { 429 passes--; 430 goto loop; 431 } 432 #ifdef DIAGNOSTIC 433 if (vp->v_type != VBLK) 434 vprint("ffs_fsync: dirty", vp); 435 #endif 436 } 437 } 438 splx(s); 439 440 if (inodedeps_only) 441 waitfor = 0; 442 else 443 waitfor = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 444 return (VOP_UPDATE(vp, NULL, NULL, waitfor)); 445 } 446 447 /* 448 * Reclaim an inode so that it can be used for other purposes. 449 */ 450 int 451 ffs_reclaim(v) 452 void *v; 453 { 454 struct vop_reclaim_args /* { 455 struct vnode *a_vp; 456 struct proc *a_p; 457 } */ *ap = v; 458 struct vnode *vp = ap->a_vp; 459 int error; 460 461 if ((error = ufs_reclaim(vp, ap->a_p)) != 0) 462 return (error); 463 /* 464 * XXX MFS ends up here, too, to free an inode. Should we create 465 * XXX a separate pool for MFS inodes? 466 */ 467 pool_put(&ffs_inode_pool, vp->v_data); 468 vp->v_data = NULL; 469 return (0); 470 } 471 472 int 473 ffs_getpages(void *v) 474 { 475 struct vop_getpages_args /* { 476 struct vnode *a_vp; 477 voff_t a_offset; 478 struct vm_page **a_m; 479 int *a_count; 480 int a_centeridx; 481 vm_prot_t a_access_type; 482 int a_advice; 483 int a_flags; 484 } */ *ap = v; 485 struct vnode *vp = ap->a_vp; 486 struct inode *ip = VTOI(vp); 487 struct fs *fs = ip->i_fs; 488 489 /* 490 * don't allow a softdep write to create pages for only part of a block. 491 * the dependency tracking requires that all pages be in memory for 492 * a block involved in a dependency. 493 */ 494 495 if (ap->a_flags & PGO_OVERWRITE && 496 (blkoff(fs, ap->a_offset) != 0 || 497 blkoff(fs, *ap->a_count << PAGE_SHIFT) != 0) && 498 DOINGSOFTDEP(ap->a_vp)) { 499 if ((ap->a_flags & PGO_LOCKED) == 0) { 500 simple_unlock(&vp->v_interlock); 501 } 502 return EINVAL; 503 } 504 return genfs_getpages(v); 505 } 506 507 int 508 ffs_putpages(void *v) 509 { 510 struct vop_putpages_args /* { 511 struct vnode *a_vp; 512 voff_t a_offlo; 513 voff_t a_offhi; 514 int a_flags; 515 } */ *ap = v; 516 struct vnode *vp = ap->a_vp; 517 struct uvm_object *uobj = &vp->v_uobj; 518 struct inode *ip = VTOI(vp); 519 struct fs *fs = ip->i_fs; 520 struct vm_page *pg; 521 off_t off; 522 ufs_lbn_t lbn; 523 524 if (!DOINGSOFTDEP(vp) || (ap->a_flags & PGO_CLEANIT) == 0) { 525 return genfs_putpages(v); 526 } 527 528 /* 529 * for softdep files, force the pages in a block to be written together. 530 * if we're the pagedaemon and we would have to wait for other pages, 531 * just fail the request. the pagedaemon will pick a different page. 532 */ 533 534 ap->a_offlo &= ~fs->fs_qbmask; 535 lbn = lblkno(fs, ap->a_offhi); 536 ap->a_offhi = blkroundup(fs, ap->a_offhi); 537 if (curproc == uvm.pagedaemon_proc) { 538 for (off = ap->a_offlo; off < ap->a_offhi; off += PAGE_SIZE) { 539 pg = uvm_pagelookup(uobj, off); 540 541 /* 542 * we only have missing pages here because the 543 * calculation of offhi above doesn't account for 544 * fragments. so once we see one missing page, 545 * the rest should be missing as well, but we'll 546 * check for the rest just to be paranoid. 547 */ 548 549 if (pg == NULL) { 550 continue; 551 } 552 if (pg->flags & PG_BUSY) { 553 simple_unlock(&uobj->vmobjlock); 554 return EBUSY; 555 } 556 } 557 } 558 return genfs_putpages(v); 559 } 560 561 /* 562 * Return the last logical file offset that should be written for this file 563 * if we're doing a write that ends at "size". 564 */ 565 566 void 567 ffs_gop_size(struct vnode *vp, off_t size, off_t *eobp) 568 { 569 struct inode *ip = VTOI(vp); 570 struct fs *fs = ip->i_fs; 571 ufs_lbn_t olbn, nlbn; 572 573 olbn = lblkno(fs, ip->i_ffs_size); 574 nlbn = lblkno(fs, size); 575 if (nlbn < NDADDR && olbn <= nlbn) { 576 *eobp = fragroundup(fs, size); 577 } else { 578 *eobp = blkroundup(fs, size); 579 } 580 } 581