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 8.8 (Berkeley) 08/10/94 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_lease_desc, ufs_lease_check }, /* lease */ 54 { &vop_ioctl_desc, ufs_ioctl }, /* ioctl */ 55 { &vop_select_desc, ufs_select }, /* select */ 56 { &vop_mmap_desc, ufs_mmap }, /* mmap */ 57 { &vop_fsync_desc, lfs_fsync }, /* fsync */ 58 { &vop_seek_desc, ufs_seek }, /* seek */ 59 { &vop_remove_desc, ufs_remove }, /* remove */ 60 { &vop_link_desc, ufs_link }, /* link */ 61 { &vop_rename_desc, ufs_rename }, /* rename */ 62 { &vop_mkdir_desc, ufs_mkdir }, /* mkdir */ 63 { &vop_rmdir_desc, ufs_rmdir }, /* rmdir */ 64 { &vop_symlink_desc, ufs_symlink }, /* symlink */ 65 { &vop_readdir_desc, ufs_readdir }, /* readdir */ 66 { &vop_readlink_desc, ufs_readlink }, /* readlink */ 67 { &vop_abortop_desc, ufs_abortop }, /* abortop */ 68 { &vop_inactive_desc, lfs_inactive }, /* inactive */ 69 { &vop_reclaim_desc, lfs_reclaim }, /* reclaim */ 70 { &vop_lock_desc, ufs_lock }, /* lock */ 71 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 72 { &vop_bmap_desc, ufs_bmap }, /* bmap */ 73 { &vop_strategy_desc, ufs_strategy }, /* strategy */ 74 { &vop_print_desc, ufs_print }, /* print */ 75 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 76 { &vop_pathconf_desc, ufs_pathconf }, /* pathconf */ 77 { &vop_advlock_desc, ufs_advlock }, /* advlock */ 78 { &vop_blkatoff_desc, lfs_blkatoff }, /* blkatoff */ 79 { &vop_valloc_desc, lfs_valloc }, /* valloc */ 80 { &vop_vfree_desc, lfs_vfree }, /* vfree */ 81 { &vop_truncate_desc, lfs_truncate }, /* truncate */ 82 { &vop_update_desc, lfs_update }, /* update */ 83 { &vop_bwrite_desc, lfs_bwrite }, /* bwrite */ 84 { (struct vnodeop_desc*)NULL, (int(*)())NULL } 85 }; 86 struct vnodeopv_desc lfs_vnodeop_opv_desc = 87 { &lfs_vnodeop_p, lfs_vnodeop_entries }; 88 89 int (**lfs_specop_p)(); 90 struct vnodeopv_entry_desc lfs_specop_entries[] = { 91 { &vop_default_desc, vn_default_error }, 92 { &vop_lookup_desc, spec_lookup }, /* lookup */ 93 { &vop_create_desc, spec_create }, /* create */ 94 { &vop_mknod_desc, spec_mknod }, /* mknod */ 95 { &vop_open_desc, spec_open }, /* open */ 96 { &vop_close_desc, ufsspec_close }, /* close */ 97 { &vop_access_desc, ufs_access }, /* access */ 98 { &vop_getattr_desc, lfs_getattr }, /* getattr */ 99 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 100 { &vop_read_desc, ufsspec_read }, /* read */ 101 { &vop_write_desc, ufsspec_write }, /* write */ 102 { &vop_lease_desc, spec_lease_check }, /* lease */ 103 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 104 { &vop_select_desc, spec_select }, /* select */ 105 { &vop_mmap_desc, spec_mmap }, /* mmap */ 106 { &vop_fsync_desc, spec_fsync }, /* fsync */ 107 { &vop_seek_desc, spec_seek }, /* seek */ 108 { &vop_remove_desc, spec_remove }, /* remove */ 109 { &vop_link_desc, spec_link }, /* link */ 110 { &vop_rename_desc, spec_rename }, /* rename */ 111 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 112 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 113 { &vop_symlink_desc, spec_symlink }, /* symlink */ 114 { &vop_readdir_desc, spec_readdir }, /* readdir */ 115 { &vop_readlink_desc, spec_readlink }, /* readlink */ 116 { &vop_abortop_desc, spec_abortop }, /* abortop */ 117 { &vop_inactive_desc, lfs_inactive }, /* inactive */ 118 { &vop_reclaim_desc, lfs_reclaim }, /* reclaim */ 119 { &vop_lock_desc, ufs_lock }, /* lock */ 120 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 121 { &vop_bmap_desc, spec_bmap }, /* bmap */ 122 { &vop_strategy_desc, spec_strategy }, /* strategy */ 123 { &vop_print_desc, ufs_print }, /* print */ 124 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 125 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 126 { &vop_advlock_desc, spec_advlock }, /* advlock */ 127 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 128 { &vop_valloc_desc, spec_valloc }, /* valloc */ 129 { &vop_vfree_desc, lfs_vfree }, /* vfree */ 130 { &vop_truncate_desc, spec_truncate }, /* truncate */ 131 { &vop_update_desc, lfs_update }, /* update */ 132 { &vop_bwrite_desc, lfs_bwrite }, /* bwrite */ 133 { (struct vnodeop_desc*)NULL, (int(*)())NULL } 134 }; 135 struct vnodeopv_desc lfs_specop_opv_desc = 136 { &lfs_specop_p, lfs_specop_entries }; 137 138 #ifdef FIFO 139 int (**lfs_fifoop_p)(); 140 struct vnodeopv_entry_desc lfs_fifoop_entries[] = { 141 { &vop_default_desc, vn_default_error }, 142 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 143 { &vop_create_desc, fifo_create }, /* create */ 144 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 145 { &vop_open_desc, fifo_open }, /* open */ 146 { &vop_close_desc, ufsfifo_close }, /* close */ 147 { &vop_access_desc, ufs_access }, /* access */ 148 { &vop_getattr_desc, lfs_getattr }, /* getattr */ 149 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 150 { &vop_read_desc, ufsfifo_read }, /* read */ 151 { &vop_write_desc, ufsfifo_write }, /* write */ 152 { &vop_lease_desc, fifo_lease_check }, /* lease */ 153 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 154 { &vop_select_desc, fifo_select }, /* select */ 155 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 156 { &vop_fsync_desc, fifo_fsync }, /* fsync */ 157 { &vop_seek_desc, fifo_seek }, /* seek */ 158 { &vop_remove_desc, fifo_remove }, /* remove */ 159 { &vop_link_desc, fifo_link }, /* link */ 160 { &vop_rename_desc, fifo_rename }, /* rename */ 161 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 162 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 163 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 164 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 165 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 166 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 167 { &vop_inactive_desc, lfs_inactive }, /* inactive */ 168 { &vop_reclaim_desc, lfs_reclaim }, /* reclaim */ 169 { &vop_lock_desc, ufs_lock }, /* lock */ 170 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 171 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 172 { &vop_strategy_desc, fifo_strategy }, /* strategy */ 173 { &vop_print_desc, ufs_print }, /* print */ 174 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 175 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 176 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 177 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 178 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 179 { &vop_vfree_desc, lfs_vfree }, /* vfree */ 180 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 181 { &vop_update_desc, lfs_update }, /* update */ 182 { &vop_bwrite_desc, lfs_bwrite }, /* bwrite */ 183 { (struct vnodeop_desc*)NULL, (int(*)())NULL } 184 }; 185 struct vnodeopv_desc lfs_fifoop_opv_desc = 186 { &lfs_fifoop_p, lfs_fifoop_entries }; 187 #endif /* FIFO */ 188 189 #define LFS_READWRITE 190 #include <ufs/ufs/ufs_readwrite.c> 191 #undef LFS_READWRITE 192 193 /* 194 * Synch an open file. 195 */ 196 /* ARGSUSED */ 197 lfs_fsync(ap) 198 struct vop_fsync_args /* { 199 struct vnode *a_vp; 200 struct ucred *a_cred; 201 int a_waitfor; 202 struct proc *a_p; 203 } */ *ap; 204 { 205 struct timeval tv; 206 207 tv = time; 208 return (VOP_UPDATE(ap->a_vp, &tv, &tv, 209 ap->a_waitfor == MNT_WAIT ? LFS_SYNC : 0)); 210 } 211 212 /* 213 * These macros are used to bracket UFS directory ops, so that we can 214 * identify all the pages touched during directory ops which need to 215 * be ordered and flushed atomically, so that they may be recovered. 216 */ 217 #define SET_DIROP(fs) { \ 218 if ((fs)->lfs_writer) \ 219 tsleep(&(fs)->lfs_dirops, PRIBIO + 1, "lfs_dirop", 0); \ 220 ++(fs)->lfs_dirops; \ 221 (fs)->lfs_doifile = 1; \ 222 } 223 224 #define SET_ENDOP(fs) { \ 225 --(fs)->lfs_dirops; \ 226 if (!(fs)->lfs_dirops) \ 227 wakeup(&(fs)->lfs_writer); \ 228 } 229 230 #define MARK_VNODE(dvp) (dvp)->v_flag |= VDIROP 231 232 int 233 lfs_symlink(ap) 234 struct vop_symlink_args /* { 235 struct vnode *a_dvp; 236 struct vnode **a_vpp; 237 struct componentname *a_cnp; 238 struct vattr *a_vap; 239 char *a_target; 240 } */ *ap; 241 { 242 int ret; 243 244 SET_DIROP(VTOI(ap->a_dvp)->i_lfs); 245 MARK_VNODE(ap->a_dvp); 246 ret = ufs_symlink(ap); 247 SET_ENDOP(VTOI(ap->a_dvp)->i_lfs); 248 return (ret); 249 } 250 251 int 252 lfs_mknod(ap) 253 struct vop_mknod_args /* { 254 struct vnode *a_dvp; 255 struct vnode **a_vpp; 256 struct componentname *a_cnp; 257 struct vattr *a_vap; 258 } */ *ap; 259 { 260 int ret; 261 262 SET_DIROP(VTOI(ap->a_dvp)->i_lfs); 263 MARK_VNODE(ap->a_dvp); 264 ret = ufs_mknod(ap); 265 SET_ENDOP(VTOI(ap->a_dvp)->i_lfs); 266 return (ret); 267 } 268 269 int 270 lfs_create(ap) 271 struct vop_create_args /* { 272 struct vnode *a_dvp; 273 struct vnode **a_vpp; 274 struct componentname *a_cnp; 275 struct vattr *a_vap; 276 } */ *ap; 277 { 278 int ret; 279 280 SET_DIROP(VTOI(ap->a_dvp)->i_lfs); 281 MARK_VNODE(ap->a_dvp); 282 ret = ufs_create(ap); 283 SET_ENDOP(VTOI(ap->a_dvp)->i_lfs); 284 return (ret); 285 } 286 287 int 288 lfs_mkdir(ap) 289 struct vop_mkdir_args /* { 290 struct vnode *a_dvp; 291 struct vnode **a_vpp; 292 struct componentname *a_cnp; 293 struct vattr *a_vap; 294 } */ *ap; 295 { 296 int ret; 297 298 SET_DIROP(VTOI(ap->a_dvp)->i_lfs); 299 MARK_VNODE(ap->a_dvp); 300 ret = ufs_mkdir(ap); 301 SET_ENDOP(VTOI(ap->a_dvp)->i_lfs); 302 return (ret); 303 } 304 305 int 306 lfs_remove(ap) 307 struct vop_remove_args /* { 308 struct vnode *a_dvp; 309 struct vnode *a_vp; 310 struct componentname *a_cnp; 311 } */ *ap; 312 { 313 int ret; 314 315 SET_DIROP(VTOI(ap->a_dvp)->i_lfs); 316 MARK_VNODE(ap->a_dvp); 317 MARK_VNODE(ap->a_vp); 318 ret = ufs_remove(ap); 319 SET_ENDOP(VTOI(ap->a_dvp)->i_lfs); 320 return (ret); 321 } 322 323 int 324 lfs_rmdir(ap) 325 struct vop_rmdir_args /* { 326 struct vnodeop_desc *a_desc; 327 struct vnode *a_dvp; 328 struct vnode *a_vp; 329 struct componentname *a_cnp; 330 } */ *ap; 331 { 332 int ret; 333 334 SET_DIROP(VTOI(ap->a_dvp)->i_lfs); 335 MARK_VNODE(ap->a_dvp); 336 MARK_VNODE(ap->a_vp); 337 ret = ufs_rmdir(ap); 338 SET_ENDOP(VTOI(ap->a_dvp)->i_lfs); 339 return (ret); 340 } 341 342 int 343 lfs_link(ap) 344 struct vop_link_args /* { 345 struct vnode *a_vp; 346 struct vnode *a_tdvp; 347 struct componentname *a_cnp; 348 } */ *ap; 349 { 350 int ret; 351 352 SET_DIROP(VTOI(ap->a_vp)->i_lfs); 353 MARK_VNODE(ap->a_vp); 354 ret = ufs_link(ap); 355 SET_ENDOP(VTOI(ap->a_vp)->i_lfs); 356 return (ret); 357 } 358 359 int 360 lfs_rename(ap) 361 struct vop_rename_args /* { 362 struct vnode *a_fdvp; 363 struct vnode *a_fvp; 364 struct componentname *a_fcnp; 365 struct vnode *a_tdvp; 366 struct vnode *a_tvp; 367 struct componentname *a_tcnp; 368 } */ *ap; 369 { 370 int ret; 371 372 SET_DIROP(VTOI(ap->a_fdvp)->i_lfs); 373 MARK_VNODE(ap->a_fdvp); 374 MARK_VNODE(ap->a_tdvp); 375 ret = ufs_rename(ap); 376 SET_ENDOP(VTOI(ap->a_fdvp)->i_lfs); 377 return (ret); 378 } 379 /* XXX hack to avoid calling ITIMES in getattr */ 380 int 381 lfs_getattr(ap) 382 struct vop_getattr_args /* { 383 struct vnode *a_vp; 384 struct vattr *a_vap; 385 struct ucred *a_cred; 386 struct proc *a_p; 387 } */ *ap; 388 { 389 register struct vnode *vp = ap->a_vp; 390 register struct inode *ip = VTOI(vp); 391 register struct vattr *vap = ap->a_vap; 392 /* 393 * Copy from inode table 394 */ 395 vap->va_fsid = ip->i_dev; 396 vap->va_fileid = ip->i_number; 397 vap->va_mode = ip->i_mode & ~IFMT; 398 vap->va_nlink = ip->i_nlink; 399 vap->va_uid = ip->i_uid; 400 vap->va_gid = ip->i_gid; 401 vap->va_rdev = (dev_t)ip->i_rdev; 402 vap->va_size = ip->i_din.di_size; 403 vap->va_atime = ip->i_atime; 404 vap->va_mtime = ip->i_mtime; 405 vap->va_ctime = ip->i_ctime; 406 vap->va_flags = ip->i_flags; 407 vap->va_gen = ip->i_gen; 408 /* this doesn't belong here */ 409 if (vp->v_type == VBLK) 410 vap->va_blocksize = BLKDEV_IOSIZE; 411 else if (vp->v_type == VCHR) 412 vap->va_blocksize = MAXBSIZE; 413 else 414 vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize; 415 vap->va_bytes = dbtob(ip->i_blocks); 416 vap->va_type = vp->v_type; 417 vap->va_filerev = ip->i_modrev; 418 return (0); 419 } 420 /* 421 * Close called 422 * 423 * XXX -- we were using ufs_close, but since it updates the 424 * times on the inode, we might need to bump the uinodes 425 * count. 426 */ 427 /* ARGSUSED */ 428 int 429 lfs_close(ap) 430 struct vop_close_args /* { 431 struct vnode *a_vp; 432 int a_fflag; 433 struct ucred *a_cred; 434 struct proc *a_p; 435 } */ *ap; 436 { 437 register struct vnode *vp = ap->a_vp; 438 register struct inode *ip = VTOI(vp); 439 int mod; 440 441 if (vp->v_usecount > 1 && !(ip->i_flag & IN_LOCKED)) { 442 mod = ip->i_flag & IN_MODIFIED; 443 ITIMES(ip, &time, &time); 444 if (!mod && ip->i_flag & IN_MODIFIED) 445 ip->i_lfs->lfs_uinodes++; 446 } 447 return (0); 448 } 449 450 /* 451 * Stub inactive routine that avoid calling ufs_inactive in some cases. 452 */ 453 int lfs_no_inactive = 0; 454 455 int 456 lfs_inactive(ap) 457 struct vop_inactive_args /* { 458 struct vnode *a_vp; 459 } */ *ap; 460 { 461 462 if (lfs_no_inactive) 463 return (0); 464 return (ufs_inactive(ap)); 465 } 466 467 /* 468 * Reclaim an inode so that it can be used for other purposes. 469 */ 470 int 471 lfs_reclaim(ap) 472 struct vop_reclaim_args /* { 473 struct vnode *a_vp; 474 } */ *ap; 475 { 476 register struct vnode *vp = ap->a_vp; 477 int error; 478 479 if (error = ufs_reclaim(vp)) 480 return (error); 481 FREE(vp->v_data, M_LFSNODE); 482 vp->v_data = NULL; 483 return (0); 484 } 485