1 /* 2 * Copyright (c) 1986, 1989, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)lfs_vnops.c 8.7 (Berkeley) 07/28/94 8 */ 9 10 #include <sys/param.h> 11 #include <sys/systm.h> 12 #include <sys/namei.h> 13 #include <sys/resourcevar.h> 14 #include <sys/kernel.h> 15 #include <sys/file.h> 16 #include <sys/stat.h> 17 #include <sys/buf.h> 18 #include <sys/proc.h> 19 #include <sys/conf.h> 20 #include <sys/mount.h> 21 #include <sys/vnode.h> 22 #include <sys/malloc.h> 23 24 #include <vm/vm.h> 25 26 #include <miscfs/specfs/specdev.h> 27 #include <miscfs/fifofs/fifo.h> 28 29 #include <ufs/ufs/quota.h> 30 #include <ufs/ufs/inode.h> 31 #include <ufs/ufs/dir.h> 32 #include <ufs/ufs/ufsmount.h> 33 #include <ufs/ufs/ufs_extern.h> 34 35 #include <ufs/lfs/lfs.h> 36 #include <ufs/lfs/lfs_extern.h> 37 38 /* Global vfs data structures for lfs. */ 39 int (**lfs_vnodeop_p)(); 40 struct vnodeopv_entry_desc lfs_vnodeop_entries[] = { 41 { &vop_default_desc, vn_default_error }, 42 { &vop_lookup_desc, ufs_lookup }, /* lookup */ 43 { &vop_create_desc, ufs_create }, /* create */ 44 { &vop_whiteout_desc, ufs_whiteout }, /* whiteout */ 45 { &vop_mknod_desc, ufs_mknod }, /* mknod */ 46 { &vop_open_desc, ufs_open }, /* open */ 47 { &vop_close_desc, lfs_close }, /* close */ 48 { &vop_access_desc, ufs_access }, /* access */ 49 { &vop_getattr_desc, lfs_getattr }, /* getattr */ 50 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 51 { &vop_read_desc, lfs_read }, /* read */ 52 { &vop_write_desc, lfs_write }, /* write */ 53 { &vop_ioctl_desc, ufs_ioctl }, /* ioctl */ 54 { &vop_select_desc, ufs_select }, /* select */ 55 { &vop_mmap_desc, ufs_mmap }, /* mmap */ 56 { &vop_fsync_desc, lfs_fsync }, /* fsync */ 57 { &vop_seek_desc, ufs_seek }, /* seek */ 58 { &vop_remove_desc, ufs_remove }, /* remove */ 59 { &vop_link_desc, ufs_link }, /* link */ 60 { &vop_rename_desc, ufs_rename }, /* rename */ 61 { &vop_mkdir_desc, ufs_mkdir }, /* mkdir */ 62 { &vop_rmdir_desc, ufs_rmdir }, /* rmdir */ 63 { &vop_symlink_desc, ufs_symlink }, /* symlink */ 64 { &vop_readdir_desc, ufs_readdir }, /* readdir */ 65 { &vop_readlink_desc, ufs_readlink }, /* readlink */ 66 { &vop_abortop_desc, ufs_abortop }, /* abortop */ 67 { &vop_inactive_desc, lfs_inactive }, /* inactive */ 68 { &vop_reclaim_desc, lfs_reclaim }, /* reclaim */ 69 { &vop_lock_desc, ufs_lock }, /* lock */ 70 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 71 { &vop_bmap_desc, ufs_bmap }, /* bmap */ 72 { &vop_strategy_desc, ufs_strategy }, /* strategy */ 73 { &vop_print_desc, ufs_print }, /* print */ 74 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 75 { &vop_pathconf_desc, ufs_pathconf }, /* pathconf */ 76 { &vop_advlock_desc, ufs_advlock }, /* advlock */ 77 { &vop_blkatoff_desc, lfs_blkatoff }, /* blkatoff */ 78 { &vop_valloc_desc, lfs_valloc }, /* valloc */ 79 { &vop_vfree_desc, lfs_vfree }, /* vfree */ 80 { &vop_truncate_desc, lfs_truncate }, /* truncate */ 81 { &vop_update_desc, lfs_update }, /* update */ 82 { &vop_bwrite_desc, lfs_bwrite }, /* bwrite */ 83 { (struct vnodeop_desc*)NULL, (int(*)())NULL } 84 }; 85 struct vnodeopv_desc lfs_vnodeop_opv_desc = 86 { &lfs_vnodeop_p, lfs_vnodeop_entries }; 87 88 int (**lfs_specop_p)(); 89 struct vnodeopv_entry_desc lfs_specop_entries[] = { 90 { &vop_default_desc, vn_default_error }, 91 { &vop_lookup_desc, spec_lookup }, /* lookup */ 92 { &vop_create_desc, spec_create }, /* create */ 93 { &vop_mknod_desc, spec_mknod }, /* mknod */ 94 { &vop_open_desc, spec_open }, /* open */ 95 { &vop_close_desc, ufsspec_close }, /* close */ 96 { &vop_access_desc, ufs_access }, /* access */ 97 { &vop_getattr_desc, lfs_getattr }, /* getattr */ 98 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 99 { &vop_read_desc, ufsspec_read }, /* read */ 100 { &vop_write_desc, ufsspec_write }, /* write */ 101 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 102 { &vop_select_desc, spec_select }, /* select */ 103 { &vop_mmap_desc, spec_mmap }, /* mmap */ 104 { &vop_fsync_desc, spec_fsync }, /* fsync */ 105 { &vop_seek_desc, spec_seek }, /* seek */ 106 { &vop_remove_desc, spec_remove }, /* remove */ 107 { &vop_link_desc, spec_link }, /* link */ 108 { &vop_rename_desc, spec_rename }, /* rename */ 109 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 110 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 111 { &vop_symlink_desc, spec_symlink }, /* symlink */ 112 { &vop_readdir_desc, spec_readdir }, /* readdir */ 113 { &vop_readlink_desc, spec_readlink }, /* readlink */ 114 { &vop_abortop_desc, spec_abortop }, /* abortop */ 115 { &vop_inactive_desc, lfs_inactive }, /* inactive */ 116 { &vop_reclaim_desc, lfs_reclaim }, /* reclaim */ 117 { &vop_lock_desc, ufs_lock }, /* lock */ 118 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 119 { &vop_bmap_desc, spec_bmap }, /* bmap */ 120 { &vop_strategy_desc, spec_strategy }, /* strategy */ 121 { &vop_print_desc, ufs_print }, /* print */ 122 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 123 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 124 { &vop_advlock_desc, spec_advlock }, /* advlock */ 125 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 126 { &vop_valloc_desc, spec_valloc }, /* valloc */ 127 { &vop_vfree_desc, lfs_vfree }, /* vfree */ 128 { &vop_truncate_desc, spec_truncate }, /* truncate */ 129 { &vop_update_desc, lfs_update }, /* update */ 130 { &vop_bwrite_desc, lfs_bwrite }, /* bwrite */ 131 { (struct vnodeop_desc*)NULL, (int(*)())NULL } 132 }; 133 struct vnodeopv_desc lfs_specop_opv_desc = 134 { &lfs_specop_p, lfs_specop_entries }; 135 136 #ifdef FIFO 137 int (**lfs_fifoop_p)(); 138 struct vnodeopv_entry_desc lfs_fifoop_entries[] = { 139 { &vop_default_desc, vn_default_error }, 140 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 141 { &vop_create_desc, fifo_create }, /* create */ 142 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 143 { &vop_open_desc, fifo_open }, /* open */ 144 { &vop_close_desc, ufsfifo_close }, /* close */ 145 { &vop_access_desc, ufs_access }, /* access */ 146 { &vop_getattr_desc, lfs_getattr }, /* getattr */ 147 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 148 { &vop_read_desc, ufsfifo_read }, /* read */ 149 { &vop_write_desc, ufsfifo_write }, /* write */ 150 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 151 { &vop_select_desc, fifo_select }, /* select */ 152 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 153 { &vop_fsync_desc, fifo_fsync }, /* fsync */ 154 { &vop_seek_desc, fifo_seek }, /* seek */ 155 { &vop_remove_desc, fifo_remove }, /* remove */ 156 { &vop_link_desc, fifo_link }, /* link */ 157 { &vop_rename_desc, fifo_rename }, /* rename */ 158 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 159 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 160 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 161 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 162 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 163 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 164 { &vop_inactive_desc, lfs_inactive }, /* inactive */ 165 { &vop_reclaim_desc, lfs_reclaim }, /* reclaim */ 166 { &vop_lock_desc, ufs_lock }, /* lock */ 167 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 168 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 169 { &vop_strategy_desc, fifo_strategy }, /* strategy */ 170 { &vop_print_desc, ufs_print }, /* print */ 171 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 172 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 173 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 174 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 175 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 176 { &vop_vfree_desc, lfs_vfree }, /* vfree */ 177 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 178 { &vop_update_desc, lfs_update }, /* update */ 179 { &vop_bwrite_desc, lfs_bwrite }, /* bwrite */ 180 { (struct vnodeop_desc*)NULL, (int(*)())NULL } 181 }; 182 struct vnodeopv_desc lfs_fifoop_opv_desc = 183 { &lfs_fifoop_p, lfs_fifoop_entries }; 184 #endif /* FIFO */ 185 186 #define LFS_READWRITE 187 #include <ufs/ufs/ufs_readwrite.c> 188 #undef LFS_READWRITE 189 190 /* 191 * Synch an open file. 192 */ 193 /* ARGSUSED */ 194 lfs_fsync(ap) 195 struct vop_fsync_args /* { 196 struct vnode *a_vp; 197 struct ucred *a_cred; 198 int a_waitfor; 199 struct proc *a_p; 200 } */ *ap; 201 { 202 struct timeval tv; 203 204 tv = time; 205 return (VOP_UPDATE(ap->a_vp, &tv, &tv, 206 ap->a_waitfor == MNT_WAIT ? LFS_SYNC : 0)); 207 } 208 209 /* 210 * These macros are used to bracket UFS directory ops, so that we can 211 * identify all the pages touched during directory ops which need to 212 * be ordered and flushed atomically, so that they may be recovered. 213 */ 214 #define SET_DIROP(fs) { \ 215 if ((fs)->lfs_writer) \ 216 tsleep(&(fs)->lfs_dirops, PRIBIO + 1, "lfs_dirop", 0); \ 217 ++(fs)->lfs_dirops; \ 218 (fs)->lfs_doifile = 1; \ 219 } 220 221 #define SET_ENDOP(fs) { \ 222 --(fs)->lfs_dirops; \ 223 if (!(fs)->lfs_dirops) \ 224 wakeup(&(fs)->lfs_writer); \ 225 } 226 227 #define MARK_VNODE(dvp) (dvp)->v_flag |= VDIROP 228 229 int 230 lfs_symlink(ap) 231 struct vop_symlink_args /* { 232 struct vnode *a_dvp; 233 struct vnode **a_vpp; 234 struct componentname *a_cnp; 235 struct vattr *a_vap; 236 char *a_target; 237 } */ *ap; 238 { 239 int ret; 240 241 SET_DIROP(VTOI(ap->a_dvp)->i_lfs); 242 MARK_VNODE(ap->a_dvp); 243 ret = ufs_symlink(ap); 244 SET_ENDOP(VTOI(ap->a_dvp)->i_lfs); 245 return (ret); 246 } 247 248 int 249 lfs_mknod(ap) 250 struct vop_mknod_args /* { 251 struct vnode *a_dvp; 252 struct vnode **a_vpp; 253 struct componentname *a_cnp; 254 struct vattr *a_vap; 255 } */ *ap; 256 { 257 int ret; 258 259 SET_DIROP(VTOI(ap->a_dvp)->i_lfs); 260 MARK_VNODE(ap->a_dvp); 261 ret = ufs_mknod(ap); 262 SET_ENDOP(VTOI(ap->a_dvp)->i_lfs); 263 return (ret); 264 } 265 266 int 267 lfs_create(ap) 268 struct vop_create_args /* { 269 struct vnode *a_dvp; 270 struct vnode **a_vpp; 271 struct componentname *a_cnp; 272 struct vattr *a_vap; 273 } */ *ap; 274 { 275 int ret; 276 277 SET_DIROP(VTOI(ap->a_dvp)->i_lfs); 278 MARK_VNODE(ap->a_dvp); 279 ret = ufs_create(ap); 280 SET_ENDOP(VTOI(ap->a_dvp)->i_lfs); 281 return (ret); 282 } 283 284 int 285 lfs_mkdir(ap) 286 struct vop_mkdir_args /* { 287 struct vnode *a_dvp; 288 struct vnode **a_vpp; 289 struct componentname *a_cnp; 290 struct vattr *a_vap; 291 } */ *ap; 292 { 293 int ret; 294 295 SET_DIROP(VTOI(ap->a_dvp)->i_lfs); 296 MARK_VNODE(ap->a_dvp); 297 ret = ufs_mkdir(ap); 298 SET_ENDOP(VTOI(ap->a_dvp)->i_lfs); 299 return (ret); 300 } 301 302 int 303 lfs_remove(ap) 304 struct vop_remove_args /* { 305 struct vnode *a_dvp; 306 struct vnode *a_vp; 307 struct componentname *a_cnp; 308 } */ *ap; 309 { 310 int ret; 311 312 SET_DIROP(VTOI(ap->a_dvp)->i_lfs); 313 MARK_VNODE(ap->a_dvp); 314 MARK_VNODE(ap->a_vp); 315 ret = ufs_remove(ap); 316 SET_ENDOP(VTOI(ap->a_dvp)->i_lfs); 317 return (ret); 318 } 319 320 int 321 lfs_rmdir(ap) 322 struct vop_rmdir_args /* { 323 struct vnodeop_desc *a_desc; 324 struct vnode *a_dvp; 325 struct vnode *a_vp; 326 struct componentname *a_cnp; 327 } */ *ap; 328 { 329 int ret; 330 331 SET_DIROP(VTOI(ap->a_dvp)->i_lfs); 332 MARK_VNODE(ap->a_dvp); 333 MARK_VNODE(ap->a_vp); 334 ret = ufs_rmdir(ap); 335 SET_ENDOP(VTOI(ap->a_dvp)->i_lfs); 336 return (ret); 337 } 338 339 int 340 lfs_link(ap) 341 struct vop_link_args /* { 342 struct vnode *a_vp; 343 struct vnode *a_tdvp; 344 struct componentname *a_cnp; 345 } */ *ap; 346 { 347 int ret; 348 349 SET_DIROP(VTOI(ap->a_vp)->i_lfs); 350 MARK_VNODE(ap->a_vp); 351 ret = ufs_link(ap); 352 SET_ENDOP(VTOI(ap->a_vp)->i_lfs); 353 return (ret); 354 } 355 356 int 357 lfs_rename(ap) 358 struct vop_rename_args /* { 359 struct vnode *a_fdvp; 360 struct vnode *a_fvp; 361 struct componentname *a_fcnp; 362 struct vnode *a_tdvp; 363 struct vnode *a_tvp; 364 struct componentname *a_tcnp; 365 } */ *ap; 366 { 367 int ret; 368 369 SET_DIROP(VTOI(ap->a_fdvp)->i_lfs); 370 MARK_VNODE(ap->a_fdvp); 371 MARK_VNODE(ap->a_tdvp); 372 ret = ufs_rename(ap); 373 SET_ENDOP(VTOI(ap->a_fdvp)->i_lfs); 374 return (ret); 375 } 376 /* XXX hack to avoid calling ITIMES in getattr */ 377 int 378 lfs_getattr(ap) 379 struct vop_getattr_args /* { 380 struct vnode *a_vp; 381 struct vattr *a_vap; 382 struct ucred *a_cred; 383 struct proc *a_p; 384 } */ *ap; 385 { 386 register struct vnode *vp = ap->a_vp; 387 register struct inode *ip = VTOI(vp); 388 register struct vattr *vap = ap->a_vap; 389 /* 390 * Copy from inode table 391 */ 392 vap->va_fsid = ip->i_dev; 393 vap->va_fileid = ip->i_number; 394 vap->va_mode = ip->i_mode & ~IFMT; 395 vap->va_nlink = ip->i_nlink; 396 vap->va_uid = ip->i_uid; 397 vap->va_gid = ip->i_gid; 398 vap->va_rdev = (dev_t)ip->i_rdev; 399 vap->va_size = ip->i_din.di_size; 400 vap->va_atime = ip->i_atime; 401 vap->va_mtime = ip->i_mtime; 402 vap->va_ctime = ip->i_ctime; 403 vap->va_flags = ip->i_flags; 404 vap->va_gen = ip->i_gen; 405 /* this doesn't belong here */ 406 if (vp->v_type == VBLK) 407 vap->va_blocksize = BLKDEV_IOSIZE; 408 else if (vp->v_type == VCHR) 409 vap->va_blocksize = MAXBSIZE; 410 else 411 vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize; 412 vap->va_bytes = dbtob(ip->i_blocks); 413 vap->va_type = vp->v_type; 414 vap->va_filerev = ip->i_modrev; 415 return (0); 416 } 417 /* 418 * Close called 419 * 420 * XXX -- we were using ufs_close, but since it updates the 421 * times on the inode, we might need to bump the uinodes 422 * count. 423 */ 424 /* ARGSUSED */ 425 int 426 lfs_close(ap) 427 struct vop_close_args /* { 428 struct vnode *a_vp; 429 int a_fflag; 430 struct ucred *a_cred; 431 struct proc *a_p; 432 } */ *ap; 433 { 434 register struct vnode *vp = ap->a_vp; 435 register struct inode *ip = VTOI(vp); 436 int mod; 437 438 if (vp->v_usecount > 1 && !(ip->i_flag & IN_LOCKED)) { 439 mod = ip->i_flag & IN_MODIFIED; 440 ITIMES(ip, &time, &time); 441 if (!mod && ip->i_flag & IN_MODIFIED) 442 ip->i_lfs->lfs_uinodes++; 443 } 444 return (0); 445 } 446 447 /* 448 * Stub inactive routine that avoid calling ufs_inactive in some cases. 449 */ 450 int lfs_no_inactive = 0; 451 452 int 453 lfs_inactive(ap) 454 struct vop_inactive_args /* { 455 struct vnode *a_vp; 456 } */ *ap; 457 { 458 459 if (lfs_no_inactive) 460 return (0); 461 return (ufs_inactive(ap)); 462 } 463 464 /* 465 * Reclaim an inode so that it can be used for other purposes. 466 */ 467 int 468 lfs_reclaim(ap) 469 struct vop_reclaim_args /* { 470 struct vnode *a_vp; 471 } */ *ap; 472 { 473 register struct vnode *vp = ap->a_vp; 474 int error; 475 476 if (error = ufs_reclaim(vp)) 477 return (error); 478 FREE(vp->v_data, M_LFSNODE); 479 vp->v_data = NULL; 480 return (0); 481 } 482