1 /* $NetBSD: lfs_vnops.c,v 1.6 1994/12/14 13:03:50 mycroft Exp $ */ 2 3 /* 4 * Copyright (c) 1986, 1989, 1991, 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 * @(#)lfs_vnops.c 8.8 (Berkeley) 8/10/94 36 */ 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/namei.h> 41 #include <sys/resourcevar.h> 42 #include <sys/kernel.h> 43 #include <sys/file.h> 44 #include <sys/stat.h> 45 #include <sys/buf.h> 46 #include <sys/proc.h> 47 #include <sys/conf.h> 48 #include <sys/mount.h> 49 #include <sys/vnode.h> 50 #include <sys/malloc.h> 51 52 #include <vm/vm.h> 53 54 #include <miscfs/specfs/specdev.h> 55 #include <miscfs/fifofs/fifo.h> 56 57 #include <ufs/ufs/quota.h> 58 #include <ufs/ufs/inode.h> 59 #include <ufs/ufs/dir.h> 60 #include <ufs/ufs/ufsmount.h> 61 #include <ufs/ufs/ufs_extern.h> 62 63 #include <ufs/lfs/lfs.h> 64 #include <ufs/lfs/lfs_extern.h> 65 66 /* Global vfs data structures for lfs. */ 67 int (**lfs_vnodeop_p)(); 68 struct vnodeopv_entry_desc lfs_vnodeop_entries[] = { 69 { &vop_default_desc, vn_default_error }, 70 { &vop_lookup_desc, ufs_lookup }, /* lookup */ 71 { &vop_create_desc, ufs_create }, /* create */ 72 { &vop_whiteout_desc, ufs_whiteout }, /* whiteout */ 73 { &vop_mknod_desc, ufs_mknod }, /* mknod */ 74 { &vop_open_desc, ufs_open }, /* open */ 75 { &vop_close_desc, lfs_close }, /* close */ 76 { &vop_access_desc, ufs_access }, /* access */ 77 { &vop_getattr_desc, lfs_getattr }, /* getattr */ 78 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 79 { &vop_read_desc, lfs_read }, /* read */ 80 { &vop_write_desc, lfs_write }, /* write */ 81 { &vop_lease_desc, ufs_lease_check }, /* lease */ 82 { &vop_ioctl_desc, ufs_ioctl }, /* ioctl */ 83 { &vop_select_desc, ufs_select }, /* select */ 84 { &vop_mmap_desc, ufs_mmap }, /* mmap */ 85 { &vop_fsync_desc, lfs_fsync }, /* fsync */ 86 { &vop_seek_desc, ufs_seek }, /* seek */ 87 { &vop_remove_desc, ufs_remove }, /* remove */ 88 { &vop_link_desc, ufs_link }, /* link */ 89 { &vop_rename_desc, ufs_rename }, /* rename */ 90 { &vop_mkdir_desc, ufs_mkdir }, /* mkdir */ 91 { &vop_rmdir_desc, ufs_rmdir }, /* rmdir */ 92 { &vop_symlink_desc, ufs_symlink }, /* symlink */ 93 { &vop_readdir_desc, ufs_readdir }, /* readdir */ 94 { &vop_readlink_desc, ufs_readlink }, /* readlink */ 95 { &vop_abortop_desc, ufs_abortop }, /* abortop */ 96 { &vop_inactive_desc, lfs_inactive }, /* inactive */ 97 { &vop_reclaim_desc, lfs_reclaim }, /* reclaim */ 98 { &vop_lock_desc, ufs_lock }, /* lock */ 99 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 100 { &vop_bmap_desc, ufs_bmap }, /* bmap */ 101 { &vop_strategy_desc, ufs_strategy }, /* strategy */ 102 { &vop_print_desc, ufs_print }, /* print */ 103 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 104 { &vop_pathconf_desc, ufs_pathconf }, /* pathconf */ 105 { &vop_advlock_desc, ufs_advlock }, /* advlock */ 106 { &vop_blkatoff_desc, lfs_blkatoff }, /* blkatoff */ 107 { &vop_valloc_desc, lfs_valloc }, /* valloc */ 108 { &vop_vfree_desc, lfs_vfree }, /* vfree */ 109 { &vop_truncate_desc, lfs_truncate }, /* truncate */ 110 { &vop_update_desc, lfs_update }, /* update */ 111 { &vop_bwrite_desc, lfs_bwrite }, /* bwrite */ 112 { (struct vnodeop_desc*)NULL, (int(*)())NULL } 113 }; 114 struct vnodeopv_desc lfs_vnodeop_opv_desc = 115 { &lfs_vnodeop_p, lfs_vnodeop_entries }; 116 117 int (**lfs_specop_p)(); 118 struct vnodeopv_entry_desc lfs_specop_entries[] = { 119 { &vop_default_desc, vn_default_error }, 120 { &vop_lookup_desc, spec_lookup }, /* lookup */ 121 { &vop_create_desc, spec_create }, /* create */ 122 { &vop_mknod_desc, spec_mknod }, /* mknod */ 123 { &vop_open_desc, spec_open }, /* open */ 124 { &vop_close_desc, ufsspec_close }, /* close */ 125 { &vop_access_desc, ufs_access }, /* access */ 126 { &vop_getattr_desc, lfs_getattr }, /* getattr */ 127 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 128 { &vop_read_desc, ufsspec_read }, /* read */ 129 { &vop_write_desc, ufsspec_write }, /* write */ 130 { &vop_lease_desc, spec_lease_check }, /* lease */ 131 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 132 { &vop_select_desc, spec_select }, /* select */ 133 { &vop_mmap_desc, spec_mmap }, /* mmap */ 134 { &vop_fsync_desc, spec_fsync }, /* fsync */ 135 { &vop_seek_desc, spec_seek }, /* seek */ 136 { &vop_remove_desc, spec_remove }, /* remove */ 137 { &vop_link_desc, spec_link }, /* link */ 138 { &vop_rename_desc, spec_rename }, /* rename */ 139 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 140 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 141 { &vop_symlink_desc, spec_symlink }, /* symlink */ 142 { &vop_readdir_desc, spec_readdir }, /* readdir */ 143 { &vop_readlink_desc, spec_readlink }, /* readlink */ 144 { &vop_abortop_desc, spec_abortop }, /* abortop */ 145 { &vop_inactive_desc, lfs_inactive }, /* inactive */ 146 { &vop_reclaim_desc, lfs_reclaim }, /* reclaim */ 147 { &vop_lock_desc, ufs_lock }, /* lock */ 148 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 149 { &vop_bmap_desc, spec_bmap }, /* bmap */ 150 { &vop_strategy_desc, spec_strategy }, /* strategy */ 151 { &vop_print_desc, ufs_print }, /* print */ 152 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 153 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 154 { &vop_advlock_desc, spec_advlock }, /* advlock */ 155 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 156 { &vop_valloc_desc, spec_valloc }, /* valloc */ 157 { &vop_vfree_desc, lfs_vfree }, /* vfree */ 158 { &vop_truncate_desc, spec_truncate }, /* truncate */ 159 { &vop_update_desc, lfs_update }, /* update */ 160 { &vop_bwrite_desc, lfs_bwrite }, /* bwrite */ 161 { (struct vnodeop_desc*)NULL, (int(*)())NULL } 162 }; 163 struct vnodeopv_desc lfs_specop_opv_desc = 164 { &lfs_specop_p, lfs_specop_entries }; 165 166 #ifdef FIFO 167 int (**lfs_fifoop_p)(); 168 struct vnodeopv_entry_desc lfs_fifoop_entries[] = { 169 { &vop_default_desc, vn_default_error }, 170 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 171 { &vop_create_desc, fifo_create }, /* create */ 172 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 173 { &vop_open_desc, fifo_open }, /* open */ 174 { &vop_close_desc, ufsfifo_close }, /* close */ 175 { &vop_access_desc, ufs_access }, /* access */ 176 { &vop_getattr_desc, lfs_getattr }, /* getattr */ 177 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 178 { &vop_read_desc, ufsfifo_read }, /* read */ 179 { &vop_write_desc, ufsfifo_write }, /* write */ 180 { &vop_lease_desc, fifo_lease_check }, /* lease */ 181 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 182 { &vop_select_desc, fifo_select }, /* select */ 183 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 184 { &vop_fsync_desc, fifo_fsync }, /* fsync */ 185 { &vop_seek_desc, fifo_seek }, /* seek */ 186 { &vop_remove_desc, fifo_remove }, /* remove */ 187 { &vop_link_desc, fifo_link }, /* link */ 188 { &vop_rename_desc, fifo_rename }, /* rename */ 189 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 190 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 191 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 192 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 193 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 194 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 195 { &vop_inactive_desc, lfs_inactive }, /* inactive */ 196 { &vop_reclaim_desc, lfs_reclaim }, /* reclaim */ 197 { &vop_lock_desc, ufs_lock }, /* lock */ 198 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 199 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 200 { &vop_strategy_desc, fifo_strategy }, /* strategy */ 201 { &vop_print_desc, ufs_print }, /* print */ 202 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 203 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 204 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 205 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 206 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 207 { &vop_vfree_desc, lfs_vfree }, /* vfree */ 208 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 209 { &vop_update_desc, lfs_update }, /* update */ 210 { &vop_bwrite_desc, lfs_bwrite }, /* bwrite */ 211 { (struct vnodeop_desc*)NULL, (int(*)())NULL } 212 }; 213 struct vnodeopv_desc lfs_fifoop_opv_desc = 214 { &lfs_fifoop_p, lfs_fifoop_entries }; 215 #endif /* FIFO */ 216 217 #define LFS_READWRITE 218 #include <ufs/ufs/ufs_readwrite.c> 219 #undef LFS_READWRITE 220 221 /* 222 * Synch an open file. 223 */ 224 /* ARGSUSED */ 225 lfs_fsync(ap) 226 struct vop_fsync_args /* { 227 struct vnode *a_vp; 228 struct ucred *a_cred; 229 int a_waitfor; 230 struct proc *a_p; 231 } */ *ap; 232 { 233 struct timeval tv; 234 235 tv = time; 236 return (VOP_UPDATE(ap->a_vp, &tv, &tv, 237 ap->a_waitfor == MNT_WAIT ? LFS_SYNC : 0)); 238 } 239 240 /* 241 * These macros are used to bracket UFS directory ops, so that we can 242 * identify all the pages touched during directory ops which need to 243 * be ordered and flushed atomically, so that they may be recovered. 244 */ 245 #define SET_DIROP(fs) { \ 246 if ((fs)->lfs_writer) \ 247 tsleep(&(fs)->lfs_dirops, PRIBIO + 1, "lfs_dirop", 0); \ 248 ++(fs)->lfs_dirops; \ 249 (fs)->lfs_doifile = 1; \ 250 } 251 252 #define SET_ENDOP(fs) { \ 253 --(fs)->lfs_dirops; \ 254 if (!(fs)->lfs_dirops) \ 255 wakeup(&(fs)->lfs_writer); \ 256 } 257 258 #define MARK_VNODE(dvp) (dvp)->v_flag |= VDIROP 259 260 int 261 lfs_symlink(ap) 262 struct vop_symlink_args /* { 263 struct vnode *a_dvp; 264 struct vnode **a_vpp; 265 struct componentname *a_cnp; 266 struct vattr *a_vap; 267 char *a_target; 268 } */ *ap; 269 { 270 int ret; 271 272 SET_DIROP(VTOI(ap->a_dvp)->i_lfs); 273 MARK_VNODE(ap->a_dvp); 274 ret = ufs_symlink(ap); 275 SET_ENDOP(VTOI(ap->a_dvp)->i_lfs); 276 return (ret); 277 } 278 279 int 280 lfs_mknod(ap) 281 struct vop_mknod_args /* { 282 struct vnode *a_dvp; 283 struct vnode **a_vpp; 284 struct componentname *a_cnp; 285 struct vattr *a_vap; 286 } */ *ap; 287 { 288 int ret; 289 290 SET_DIROP(VTOI(ap->a_dvp)->i_lfs); 291 MARK_VNODE(ap->a_dvp); 292 ret = ufs_mknod(ap); 293 SET_ENDOP(VTOI(ap->a_dvp)->i_lfs); 294 return (ret); 295 } 296 297 int 298 lfs_create(ap) 299 struct vop_create_args /* { 300 struct vnode *a_dvp; 301 struct vnode **a_vpp; 302 struct componentname *a_cnp; 303 struct vattr *a_vap; 304 } */ *ap; 305 { 306 int ret; 307 308 SET_DIROP(VTOI(ap->a_dvp)->i_lfs); 309 MARK_VNODE(ap->a_dvp); 310 ret = ufs_create(ap); 311 SET_ENDOP(VTOI(ap->a_dvp)->i_lfs); 312 return (ret); 313 } 314 315 int 316 lfs_mkdir(ap) 317 struct vop_mkdir_args /* { 318 struct vnode *a_dvp; 319 struct vnode **a_vpp; 320 struct componentname *a_cnp; 321 struct vattr *a_vap; 322 } */ *ap; 323 { 324 int ret; 325 326 SET_DIROP(VTOI(ap->a_dvp)->i_lfs); 327 MARK_VNODE(ap->a_dvp); 328 ret = ufs_mkdir(ap); 329 SET_ENDOP(VTOI(ap->a_dvp)->i_lfs); 330 return (ret); 331 } 332 333 int 334 lfs_remove(ap) 335 struct vop_remove_args /* { 336 struct vnode *a_dvp; 337 struct vnode *a_vp; 338 struct componentname *a_cnp; 339 } */ *ap; 340 { 341 int ret; 342 343 SET_DIROP(VTOI(ap->a_dvp)->i_lfs); 344 MARK_VNODE(ap->a_dvp); 345 MARK_VNODE(ap->a_vp); 346 ret = ufs_remove(ap); 347 SET_ENDOP(VTOI(ap->a_dvp)->i_lfs); 348 return (ret); 349 } 350 351 int 352 lfs_rmdir(ap) 353 struct vop_rmdir_args /* { 354 struct vnodeop_desc *a_desc; 355 struct vnode *a_dvp; 356 struct vnode *a_vp; 357 struct componentname *a_cnp; 358 } */ *ap; 359 { 360 int ret; 361 362 SET_DIROP(VTOI(ap->a_dvp)->i_lfs); 363 MARK_VNODE(ap->a_dvp); 364 MARK_VNODE(ap->a_vp); 365 ret = ufs_rmdir(ap); 366 SET_ENDOP(VTOI(ap->a_dvp)->i_lfs); 367 return (ret); 368 } 369 370 int 371 lfs_link(ap) 372 struct vop_link_args /* { 373 struct vnode *a_vp; 374 struct vnode *a_tdvp; 375 struct componentname *a_cnp; 376 } */ *ap; 377 { 378 int ret; 379 380 SET_DIROP(VTOI(ap->a_vp)->i_lfs); 381 MARK_VNODE(ap->a_vp); 382 ret = ufs_link(ap); 383 SET_ENDOP(VTOI(ap->a_vp)->i_lfs); 384 return (ret); 385 } 386 387 int 388 lfs_rename(ap) 389 struct vop_rename_args /* { 390 struct vnode *a_fdvp; 391 struct vnode *a_fvp; 392 struct componentname *a_fcnp; 393 struct vnode *a_tdvp; 394 struct vnode *a_tvp; 395 struct componentname *a_tcnp; 396 } */ *ap; 397 { 398 int ret; 399 400 SET_DIROP(VTOI(ap->a_fdvp)->i_lfs); 401 MARK_VNODE(ap->a_fdvp); 402 MARK_VNODE(ap->a_tdvp); 403 ret = ufs_rename(ap); 404 SET_ENDOP(VTOI(ap->a_fdvp)->i_lfs); 405 return (ret); 406 } 407 /* XXX hack to avoid calling ITIMES in getattr */ 408 int 409 lfs_getattr(ap) 410 struct vop_getattr_args /* { 411 struct vnode *a_vp; 412 struct vattr *a_vap; 413 struct ucred *a_cred; 414 struct proc *a_p; 415 } */ *ap; 416 { 417 register struct vnode *vp = ap->a_vp; 418 register struct inode *ip = VTOI(vp); 419 register struct vattr *vap = ap->a_vap; 420 /* 421 * Copy from inode table 422 */ 423 vap->va_fsid = ip->i_dev; 424 vap->va_fileid = ip->i_number; 425 vap->va_mode = ip->i_mode & ~IFMT; 426 vap->va_nlink = ip->i_nlink; 427 vap->va_uid = ip->i_uid; 428 vap->va_gid = ip->i_gid; 429 vap->va_rdev = (dev_t)ip->i_rdev; 430 vap->va_size = ip->i_din.di_size; 431 vap->va_atime = ip->i_atime; 432 vap->va_mtime = ip->i_mtime; 433 vap->va_ctime = ip->i_ctime; 434 vap->va_flags = ip->i_flags; 435 vap->va_gen = ip->i_gen; 436 /* this doesn't belong here */ 437 if (vp->v_type == VBLK) 438 vap->va_blocksize = BLKDEV_IOSIZE; 439 else if (vp->v_type == VCHR) 440 vap->va_blocksize = MAXBSIZE; 441 else 442 vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize; 443 vap->va_bytes = dbtob(ip->i_blocks); 444 vap->va_type = vp->v_type; 445 vap->va_filerev = ip->i_modrev; 446 return (0); 447 } 448 /* 449 * Close called 450 * 451 * XXX -- we were using ufs_close, but since it updates the 452 * times on the inode, we might need to bump the uinodes 453 * count. 454 */ 455 /* ARGSUSED */ 456 int 457 lfs_close(ap) 458 struct vop_close_args /* { 459 struct vnode *a_vp; 460 int a_fflag; 461 struct ucred *a_cred; 462 struct proc *a_p; 463 } */ *ap; 464 { 465 register struct vnode *vp = ap->a_vp; 466 register struct inode *ip = VTOI(vp); 467 int mod; 468 469 if (vp->v_usecount > 1 && !(ip->i_flag & IN_LOCKED)) { 470 mod = ip->i_flag & IN_MODIFIED; 471 ITIMES(ip, &time, &time); 472 if (!mod && ip->i_flag & IN_MODIFIED) 473 ip->i_lfs->lfs_uinodes++; 474 } 475 return (0); 476 } 477 478 /* 479 * Stub inactive routine that avoid calling ufs_inactive in some cases. 480 */ 481 int lfs_no_inactive = 0; 482 483 int 484 lfs_inactive(ap) 485 struct vop_inactive_args /* { 486 struct vnode *a_vp; 487 } */ *ap; 488 { 489 490 if (lfs_no_inactive) 491 return (0); 492 return (ufs_inactive(ap)); 493 } 494 495 /* 496 * Reclaim an inode so that it can be used for other purposes. 497 */ 498 int 499 lfs_reclaim(ap) 500 struct vop_reclaim_args /* { 501 struct vnode *a_vp; 502 } */ *ap; 503 { 504 register struct vnode *vp = ap->a_vp; 505 int error; 506 507 if (error = ufs_reclaim(vp)) 508 return (error); 509 FREE(vp->v_data, M_LFSNODE); 510 vp->v_data = NULL; 511 return (0); 512 } 513