1 /* $NetBSD: lfs_vnops.c,v 1.3 1994/10/20 04:21:13 cgd 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 8.5 (Berkeley) 12/30/93 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_mknod_desc, ufs_mknod }, /* mknod */ 73 { &vop_open_desc, ufs_open }, /* open */ 74 { &vop_close_desc, lfs_close }, /* close */ 75 { &vop_access_desc, ufs_access }, /* access */ 76 { &vop_getattr_desc, lfs_getattr }, /* getattr */ 77 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 78 { &vop_read_desc, lfs_read }, /* read */ 79 { &vop_write_desc, lfs_write }, /* write */ 80 { &vop_ioctl_desc, ufs_ioctl }, /* ioctl */ 81 { &vop_select_desc, ufs_select }, /* select */ 82 { &vop_mmap_desc, ufs_mmap }, /* mmap */ 83 { &vop_fsync_desc, lfs_fsync }, /* fsync */ 84 { &vop_seek_desc, ufs_seek }, /* seek */ 85 { &vop_remove_desc, ufs_remove }, /* remove */ 86 { &vop_link_desc, ufs_link }, /* link */ 87 { &vop_rename_desc, ufs_rename }, /* rename */ 88 { &vop_mkdir_desc, ufs_mkdir }, /* mkdir */ 89 { &vop_rmdir_desc, ufs_rmdir }, /* rmdir */ 90 { &vop_symlink_desc, ufs_symlink }, /* symlink */ 91 { &vop_readdir_desc, ufs_readdir }, /* readdir */ 92 { &vop_readlink_desc, ufs_readlink }, /* readlink */ 93 { &vop_abortop_desc, ufs_abortop }, /* abortop */ 94 { &vop_inactive_desc, lfs_inactive }, /* inactive */ 95 { &vop_reclaim_desc, lfs_reclaim }, /* reclaim */ 96 { &vop_lock_desc, ufs_lock }, /* lock */ 97 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 98 { &vop_bmap_desc, ufs_bmap }, /* bmap */ 99 { &vop_strategy_desc, ufs_strategy }, /* strategy */ 100 { &vop_print_desc, ufs_print }, /* print */ 101 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 102 { &vop_pathconf_desc, ufs_pathconf }, /* pathconf */ 103 { &vop_advlock_desc, ufs_advlock }, /* advlock */ 104 { &vop_blkatoff_desc, lfs_blkatoff }, /* blkatoff */ 105 { &vop_valloc_desc, lfs_valloc }, /* valloc */ 106 { &vop_vfree_desc, lfs_vfree }, /* vfree */ 107 { &vop_truncate_desc, lfs_truncate }, /* truncate */ 108 { &vop_update_desc, lfs_update }, /* update */ 109 { &vop_bwrite_desc, lfs_bwrite }, /* bwrite */ 110 { (struct vnodeop_desc*)NULL, (int(*)())NULL } 111 }; 112 struct vnodeopv_desc lfs_vnodeop_opv_desc = 113 { &lfs_vnodeop_p, lfs_vnodeop_entries }; 114 115 int (**lfs_specop_p)(); 116 struct vnodeopv_entry_desc lfs_specop_entries[] = { 117 { &vop_default_desc, vn_default_error }, 118 { &vop_lookup_desc, spec_lookup }, /* lookup */ 119 { &vop_create_desc, spec_create }, /* create */ 120 { &vop_mknod_desc, spec_mknod }, /* mknod */ 121 { &vop_open_desc, spec_open }, /* open */ 122 { &vop_close_desc, ufsspec_close }, /* close */ 123 { &vop_access_desc, ufs_access }, /* access */ 124 { &vop_getattr_desc, lfs_getattr }, /* getattr */ 125 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 126 { &vop_read_desc, ufsspec_read }, /* read */ 127 { &vop_write_desc, ufsspec_write }, /* write */ 128 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 129 { &vop_select_desc, spec_select }, /* select */ 130 { &vop_mmap_desc, spec_mmap }, /* mmap */ 131 { &vop_fsync_desc, spec_fsync }, /* fsync */ 132 { &vop_seek_desc, spec_seek }, /* seek */ 133 { &vop_remove_desc, spec_remove }, /* remove */ 134 { &vop_link_desc, spec_link }, /* link */ 135 { &vop_rename_desc, spec_rename }, /* rename */ 136 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 137 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 138 { &vop_symlink_desc, spec_symlink }, /* symlink */ 139 { &vop_readdir_desc, spec_readdir }, /* readdir */ 140 { &vop_readlink_desc, spec_readlink }, /* readlink */ 141 { &vop_abortop_desc, spec_abortop }, /* abortop */ 142 { &vop_inactive_desc, lfs_inactive }, /* inactive */ 143 { &vop_reclaim_desc, lfs_reclaim }, /* reclaim */ 144 { &vop_lock_desc, ufs_lock }, /* lock */ 145 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 146 { &vop_bmap_desc, spec_bmap }, /* bmap */ 147 { &vop_strategy_desc, spec_strategy }, /* strategy */ 148 { &vop_print_desc, ufs_print }, /* print */ 149 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 150 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 151 { &vop_advlock_desc, spec_advlock }, /* advlock */ 152 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 153 { &vop_valloc_desc, spec_valloc }, /* valloc */ 154 { &vop_vfree_desc, lfs_vfree }, /* vfree */ 155 { &vop_truncate_desc, spec_truncate }, /* truncate */ 156 { &vop_update_desc, lfs_update }, /* update */ 157 { &vop_bwrite_desc, lfs_bwrite }, /* bwrite */ 158 { (struct vnodeop_desc*)NULL, (int(*)())NULL } 159 }; 160 struct vnodeopv_desc lfs_specop_opv_desc = 161 { &lfs_specop_p, lfs_specop_entries }; 162 163 #ifdef FIFO 164 int (**lfs_fifoop_p)(); 165 struct vnodeopv_entry_desc lfs_fifoop_entries[] = { 166 { &vop_default_desc, vn_default_error }, 167 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 168 { &vop_create_desc, fifo_create }, /* create */ 169 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 170 { &vop_open_desc, fifo_open }, /* open */ 171 { &vop_close_desc, ufsfifo_close }, /* close */ 172 { &vop_access_desc, ufs_access }, /* access */ 173 { &vop_getattr_desc, lfs_getattr }, /* getattr */ 174 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 175 { &vop_read_desc, ufsfifo_read }, /* read */ 176 { &vop_write_desc, ufsfifo_write }, /* write */ 177 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 178 { &vop_select_desc, fifo_select }, /* select */ 179 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 180 { &vop_fsync_desc, fifo_fsync }, /* fsync */ 181 { &vop_seek_desc, fifo_seek }, /* seek */ 182 { &vop_remove_desc, fifo_remove }, /* remove */ 183 { &vop_link_desc, fifo_link }, /* link */ 184 { &vop_rename_desc, fifo_rename }, /* rename */ 185 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 186 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 187 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 188 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 189 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 190 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 191 { &vop_inactive_desc, lfs_inactive }, /* inactive */ 192 { &vop_reclaim_desc, lfs_reclaim }, /* reclaim */ 193 { &vop_lock_desc, ufs_lock }, /* lock */ 194 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 195 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 196 { &vop_strategy_desc, fifo_strategy }, /* strategy */ 197 { &vop_print_desc, ufs_print }, /* print */ 198 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 199 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 200 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 201 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 202 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 203 { &vop_vfree_desc, lfs_vfree }, /* vfree */ 204 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 205 { &vop_update_desc, lfs_update }, /* update */ 206 { &vop_bwrite_desc, lfs_bwrite }, /* bwrite */ 207 { (struct vnodeop_desc*)NULL, (int(*)())NULL } 208 }; 209 struct vnodeopv_desc lfs_fifoop_opv_desc = 210 { &lfs_fifoop_p, lfs_fifoop_entries }; 211 #endif /* FIFO */ 212 213 #define LFS_READWRITE 214 #include <ufs/ufs/ufs_readwrite.c> 215 #undef LFS_READWRITE 216 217 /* 218 * Synch an open file. 219 */ 220 /* ARGSUSED */ 221 lfs_fsync(ap) 222 struct vop_fsync_args /* { 223 struct vnode *a_vp; 224 struct ucred *a_cred; 225 int a_waitfor; 226 struct proc *a_p; 227 } */ *ap; 228 { 229 struct timeval tv; 230 231 tv = time; 232 return (VOP_UPDATE(ap->a_vp, &tv, &tv, 233 ap->a_waitfor == MNT_WAIT ? LFS_SYNC : 0)); 234 } 235 236 /* 237 * These macros are used to bracket UFS directory ops, so that we can 238 * identify all the pages touched during directory ops which need to 239 * be ordered and flushed atomically, so that they may be recovered. 240 */ 241 #define SET_DIROP(fs) { \ 242 if ((fs)->lfs_writer) \ 243 tsleep(&(fs)->lfs_dirops, PRIBIO + 1, "lfs_dirop", 0); \ 244 ++(fs)->lfs_dirops; \ 245 (fs)->lfs_doifile = 1; \ 246 } 247 248 #define SET_ENDOP(fs) { \ 249 --(fs)->lfs_dirops; \ 250 if (!(fs)->lfs_dirops) \ 251 wakeup(&(fs)->lfs_writer); \ 252 } 253 254 #define MARK_VNODE(dvp) (dvp)->v_flag |= VDIROP 255 256 int 257 lfs_symlink(ap) 258 struct vop_symlink_args /* { 259 struct vnode *a_dvp; 260 struct vnode **a_vpp; 261 struct componentname *a_cnp; 262 struct vattr *a_vap; 263 char *a_target; 264 } */ *ap; 265 { 266 int ret; 267 268 SET_DIROP(VTOI(ap->a_dvp)->i_lfs); 269 MARK_VNODE(ap->a_dvp); 270 ret = ufs_symlink(ap); 271 SET_ENDOP(VTOI(ap->a_dvp)->i_lfs); 272 return (ret); 273 } 274 275 int 276 lfs_mknod(ap) 277 struct vop_mknod_args /* { 278 struct vnode *a_dvp; 279 struct vnode **a_vpp; 280 struct componentname *a_cnp; 281 struct vattr *a_vap; 282 } */ *ap; 283 { 284 int ret; 285 286 SET_DIROP(VTOI(ap->a_dvp)->i_lfs); 287 MARK_VNODE(ap->a_dvp); 288 ret = ufs_mknod(ap); 289 SET_ENDOP(VTOI(ap->a_dvp)->i_lfs); 290 return (ret); 291 } 292 293 int 294 lfs_create(ap) 295 struct vop_create_args /* { 296 struct vnode *a_dvp; 297 struct vnode **a_vpp; 298 struct componentname *a_cnp; 299 struct vattr *a_vap; 300 } */ *ap; 301 { 302 int ret; 303 304 SET_DIROP(VTOI(ap->a_dvp)->i_lfs); 305 MARK_VNODE(ap->a_dvp); 306 ret = ufs_create(ap); 307 SET_ENDOP(VTOI(ap->a_dvp)->i_lfs); 308 return (ret); 309 } 310 311 int 312 lfs_mkdir(ap) 313 struct vop_mkdir_args /* { 314 struct vnode *a_dvp; 315 struct vnode **a_vpp; 316 struct componentname *a_cnp; 317 struct vattr *a_vap; 318 } */ *ap; 319 { 320 int ret; 321 322 SET_DIROP(VTOI(ap->a_dvp)->i_lfs); 323 MARK_VNODE(ap->a_dvp); 324 ret = ufs_mkdir(ap); 325 SET_ENDOP(VTOI(ap->a_dvp)->i_lfs); 326 return (ret); 327 } 328 329 int 330 lfs_remove(ap) 331 struct vop_remove_args /* { 332 struct vnode *a_dvp; 333 struct vnode *a_vp; 334 struct componentname *a_cnp; 335 } */ *ap; 336 { 337 int ret; 338 339 SET_DIROP(VTOI(ap->a_dvp)->i_lfs); 340 MARK_VNODE(ap->a_dvp); 341 MARK_VNODE(ap->a_vp); 342 ret = ufs_remove(ap); 343 SET_ENDOP(VTOI(ap->a_dvp)->i_lfs); 344 return (ret); 345 } 346 347 int 348 lfs_rmdir(ap) 349 struct vop_rmdir_args /* { 350 struct vnodeop_desc *a_desc; 351 struct vnode *a_dvp; 352 struct vnode *a_vp; 353 struct componentname *a_cnp; 354 } */ *ap; 355 { 356 int ret; 357 358 SET_DIROP(VTOI(ap->a_dvp)->i_lfs); 359 MARK_VNODE(ap->a_dvp); 360 MARK_VNODE(ap->a_vp); 361 ret = ufs_rmdir(ap); 362 SET_ENDOP(VTOI(ap->a_dvp)->i_lfs); 363 return (ret); 364 } 365 366 int 367 lfs_link(ap) 368 struct vop_link_args /* { 369 struct vnode *a_vp; 370 struct vnode *a_tdvp; 371 struct componentname *a_cnp; 372 } */ *ap; 373 { 374 int ret; 375 376 SET_DIROP(VTOI(ap->a_vp)->i_lfs); 377 MARK_VNODE(ap->a_vp); 378 ret = ufs_link(ap); 379 SET_ENDOP(VTOI(ap->a_vp)->i_lfs); 380 return (ret); 381 } 382 383 int 384 lfs_rename(ap) 385 struct vop_rename_args /* { 386 struct vnode *a_fdvp; 387 struct vnode *a_fvp; 388 struct componentname *a_fcnp; 389 struct vnode *a_tdvp; 390 struct vnode *a_tvp; 391 struct componentname *a_tcnp; 392 } */ *ap; 393 { 394 int ret; 395 396 SET_DIROP(VTOI(ap->a_fdvp)->i_lfs); 397 MARK_VNODE(ap->a_fdvp); 398 MARK_VNODE(ap->a_tdvp); 399 ret = ufs_rename(ap); 400 SET_ENDOP(VTOI(ap->a_fdvp)->i_lfs); 401 return (ret); 402 } 403 /* XXX hack to avoid calling ITIMES in getattr */ 404 int 405 lfs_getattr(ap) 406 struct vop_getattr_args /* { 407 struct vnode *a_vp; 408 struct vattr *a_vap; 409 struct ucred *a_cred; 410 struct proc *a_p; 411 } */ *ap; 412 { 413 register struct vnode *vp = ap->a_vp; 414 register struct inode *ip = VTOI(vp); 415 register struct vattr *vap = ap->a_vap; 416 /* 417 * Copy from inode table 418 */ 419 vap->va_fsid = ip->i_dev; 420 vap->va_fileid = ip->i_number; 421 vap->va_mode = ip->i_mode & ~IFMT; 422 vap->va_nlink = ip->i_nlink; 423 vap->va_uid = ip->i_uid; 424 vap->va_gid = ip->i_gid; 425 vap->va_rdev = (dev_t)ip->i_rdev; 426 vap->va_size = ip->i_din.di_size; 427 vap->va_atime.ts_sec = ip->i_atime.ts_sec; 428 vap->va_atime.ts_nsec = ip->i_atime.ts_nsec; 429 vap->va_mtime.ts_sec = ip->i_mtime.ts_sec; 430 vap->va_mtime.ts_nsec = ip->i_mtime.ts_nsec; 431 vap->va_ctime.ts_sec = ip->i_ctime.ts_sec; 432 vap->va_ctime.ts_nsec = ip->i_ctime.ts_nsec; 433 vap->va_flags = ip->i_flags; 434 vap->va_gen = ip->i_gen; 435 /* this doesn't belong here */ 436 if (vp->v_type == VBLK) 437 vap->va_blocksize = BLKDEV_IOSIZE; 438 else if (vp->v_type == VCHR) 439 vap->va_blocksize = MAXBSIZE; 440 else 441 vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize; 442 vap->va_bytes = dbtob(ip->i_blocks); 443 vap->va_type = vp->v_type; 444 vap->va_filerev = ip->i_modrev; 445 return (0); 446 } 447 /* 448 * Close called 449 * 450 * XXX -- we were using ufs_close, but since it updates the 451 * times on the inode, we might need to bump the uinodes 452 * count. 453 */ 454 /* ARGSUSED */ 455 int 456 lfs_close(ap) 457 struct vop_close_args /* { 458 struct vnode *a_vp; 459 int a_fflag; 460 struct ucred *a_cred; 461 struct proc *a_p; 462 } */ *ap; 463 { 464 register struct vnode *vp = ap->a_vp; 465 register struct inode *ip = VTOI(vp); 466 int mod; 467 468 if (vp->v_usecount > 1 && !(ip->i_flag & IN_LOCKED)) { 469 mod = ip->i_flag & IN_MODIFIED; 470 ITIMES(ip, &time, &time); 471 if (!mod && ip->i_flag & IN_MODIFIED) 472 ip->i_lfs->lfs_uinodes++; 473 } 474 return (0); 475 } 476 477 /* 478 * Stub inactive routine that avoid calling ufs_inactive in some cases. 479 */ 480 int lfs_no_inactive = 0; 481 482 int 483 lfs_inactive(ap) 484 struct vop_inactive_args /* { 485 struct vnode *a_vp; 486 } */ *ap; 487 { 488 489 if (lfs_no_inactive) 490 return (0); 491 return (ufs_inactive(ap)); 492 } 493 494 /* 495 * Reclaim an inode so that it can be used for other purposes. 496 */ 497 int 498 lfs_reclaim(ap) 499 struct vop_reclaim_args /* { 500 struct vnode *a_vp; 501 } */ *ap; 502 { 503 register struct vnode *vp = ap->a_vp; 504 int error; 505 506 error = ufs_reclaim(vp); 507 if (error) 508 return (error); 509 FREE(vp->v_data, M_LFSNODE); 510 vp->v_data = NULL; 511 return (0); 512 } 513