1 /* 2 * Copyright (c) 1986, 1989, 1991 Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)lfs_vnops.c 7.84 (Berkeley) 06/17/92 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/specdev.h> 23 #include <sys/fifo.h> 24 #include <sys/malloc.h> 25 26 #include <vm/vm.h> 27 28 #include <ufs/ufs/quota.h> 29 #include <ufs/ufs/inode.h> 30 #include <ufs/ufs/dir.h> 31 #include <ufs/ufs/ufs_extern.h> 32 33 #include <ufs/lfs/lfs.h> 34 #include <ufs/lfs/lfs_extern.h> 35 36 /* Global vfs data structures for lfs. */ 37 int (**lfs_vnodeop_p)(); 38 struct vnodeopv_entry_desc lfs_vnodeop_entries[] = { 39 { &vop_default_desc, vn_default_error }, 40 { &vop_lookup_desc, ufs_lookup }, /* lookup */ 41 { &vop_create_desc, ufs_create }, /* create */ 42 { &vop_mknod_desc, ufs_mknod }, /* mknod */ 43 { &vop_open_desc, ufs_open }, /* open */ 44 { &vop_close_desc, ufs_close }, /* close */ 45 { &vop_access_desc, ufs_access }, /* access */ 46 { &vop_getattr_desc, ufs_getattr }, /* getattr */ 47 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 48 { &vop_read_desc, lfs_read }, /* read */ 49 { &vop_write_desc, lfs_write }, /* write */ 50 { &vop_ioctl_desc, ufs_ioctl }, /* ioctl */ 51 { &vop_select_desc, ufs_select }, /* select */ 52 { &vop_mmap_desc, ufs_mmap }, /* mmap */ 53 { &vop_fsync_desc, lfs_fsync }, /* fsync */ 54 { &vop_seek_desc, ufs_seek }, /* seek */ 55 { &vop_remove_desc, ufs_remove }, /* remove */ 56 { &vop_link_desc, ufs_link }, /* link */ 57 { &vop_rename_desc, ufs_rename }, /* rename */ 58 { &vop_mkdir_desc, ufs_mkdir }, /* mkdir */ 59 { &vop_rmdir_desc, ufs_rmdir }, /* rmdir */ 60 { &vop_symlink_desc, ufs_symlink }, /* symlink */ 61 { &vop_readdir_desc, ufs_readdir }, /* readdir */ 62 { &vop_readlink_desc, ufs_readlink }, /* readlink */ 63 { &vop_abortop_desc, ufs_abortop }, /* abortop */ 64 { &vop_inactive_desc, lfs_inactive }, /* inactive */ 65 { &vop_reclaim_desc, ufs_reclaim }, /* reclaim */ 66 { &vop_lock_desc, ufs_lock }, /* lock */ 67 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 68 { &vop_bmap_desc, lfs_bmap }, /* bmap */ 69 { &vop_strategy_desc, ufs_strategy }, /* strategy */ 70 { &vop_print_desc, ufs_print }, /* print */ 71 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 72 { &vop_advlock_desc, ufs_advlock }, /* advlock */ 73 { &vop_blkatoff_desc, lfs_blkatoff }, /* blkatoff */ 74 { &vop_vget_desc, lfs_vget }, /* vget */ 75 { &vop_valloc_desc, lfs_valloc }, /* valloc */ 76 { &vop_vfree_desc, lfs_vfree }, /* vfree */ 77 { &vop_truncate_desc, lfs_truncate }, /* truncate */ 78 { &vop_update_desc, lfs_update }, /* update */ 79 { &vop_bwrite_desc, lfs_bwrite }, /* bwrite */ 80 { (struct vnodeop_desc*)NULL, (int(*)())NULL } 81 }; 82 struct vnodeopv_desc lfs_vnodeop_opv_desc = 83 { &lfs_vnodeop_p, lfs_vnodeop_entries }; 84 85 int (**lfs_specop_p)(); 86 struct vnodeopv_entry_desc lfs_specop_entries[] = { 87 { &vop_default_desc, vn_default_error }, 88 { &vop_lookup_desc, spec_lookup }, /* lookup */ 89 { &vop_create_desc, spec_create }, /* create */ 90 { &vop_mknod_desc, spec_mknod }, /* mknod */ 91 { &vop_open_desc, spec_open }, /* open */ 92 { &vop_close_desc, ufsspec_close }, /* close */ 93 { &vop_access_desc, ufs_access }, /* access */ 94 { &vop_getattr_desc, ufs_getattr }, /* getattr */ 95 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 96 { &vop_read_desc, ufsspec_read }, /* read */ 97 { &vop_write_desc, ufsspec_write }, /* write */ 98 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 99 { &vop_select_desc, spec_select }, /* select */ 100 { &vop_mmap_desc, spec_mmap }, /* mmap */ 101 { &vop_fsync_desc, spec_fsync }, /* fsync */ 102 { &vop_seek_desc, spec_seek }, /* seek */ 103 { &vop_remove_desc, spec_remove }, /* remove */ 104 { &vop_link_desc, spec_link }, /* link */ 105 { &vop_rename_desc, spec_rename }, /* rename */ 106 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 107 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 108 { &vop_symlink_desc, spec_symlink }, /* symlink */ 109 { &vop_readdir_desc, spec_readdir }, /* readdir */ 110 { &vop_readlink_desc, spec_readlink }, /* readlink */ 111 { &vop_abortop_desc, spec_abortop }, /* abortop */ 112 { &vop_inactive_desc, lfs_inactive }, /* inactive */ 113 { &vop_reclaim_desc, ufs_reclaim }, /* reclaim */ 114 { &vop_lock_desc, ufs_lock }, /* lock */ 115 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 116 { &vop_bmap_desc, spec_bmap }, /* bmap */ 117 { &vop_strategy_desc, spec_strategy }, /* strategy */ 118 { &vop_print_desc, ufs_print }, /* print */ 119 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 120 { &vop_advlock_desc, spec_advlock }, /* advlock */ 121 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 122 { &vop_vget_desc, spec_vget }, /* vget */ 123 { &vop_valloc_desc, spec_valloc }, /* valloc */ 124 { &vop_vfree_desc, lfs_vfree }, /* vfree */ 125 { &vop_truncate_desc, spec_truncate }, /* truncate */ 126 { &vop_update_desc, lfs_update }, /* update */ 127 { &vop_bwrite_desc, lfs_bwrite }, /* bwrite */ 128 { (struct vnodeop_desc*)NULL, (int(*)())NULL } 129 }; 130 struct vnodeopv_desc lfs_specop_opv_desc = 131 { &lfs_specop_p, lfs_specop_entries }; 132 133 #ifdef FIFO 134 int (**lfs_fifoop_p)(); 135 struct vnodeopv_entry_desc lfs_fifoop_entries[] = { 136 { &vop_default_desc, vn_default_error }, 137 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 138 { &vop_create_desc, fifo_create }, /* create */ 139 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 140 { &vop_open_desc, fifo_open }, /* open */ 141 { &vop_close_desc, ufsfifo_close }, /* close */ 142 { &vop_access_desc, ufs_access }, /* access */ 143 { &vop_getattr_desc, ufs_getattr }, /* getattr */ 144 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 145 { &vop_read_desc, ufsfifo_read }, /* read */ 146 { &vop_write_desc, ufsfifo_write }, /* write */ 147 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 148 { &vop_select_desc, fifo_select }, /* select */ 149 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 150 { &vop_fsync_desc, fifo_fsync }, /* fsync */ 151 { &vop_seek_desc, fifo_seek }, /* seek */ 152 { &vop_remove_desc, fifo_remove }, /* remove */ 153 { &vop_link_desc, fifo_link }, /* link */ 154 { &vop_rename_desc, fifo_rename }, /* rename */ 155 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 156 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 157 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 158 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 159 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 160 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 161 { &vop_inactive_desc, lfs_inactive }, /* inactive */ 162 { &vop_reclaim_desc, ufs_reclaim }, /* reclaim */ 163 { &vop_lock_desc, ufs_lock }, /* lock */ 164 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 165 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 166 { &vop_strategy_desc, fifo_strategy }, /* strategy */ 167 { &vop_print_desc, ufs_print }, /* print */ 168 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 169 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 170 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 171 { &vop_vget_desc, fifo_vget }, /* vget */ 172 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 173 { &vop_vfree_desc, lfs_vfree }, /* vfree */ 174 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 175 { &vop_update_desc, lfs_update }, /* update */ 176 { &vop_bwrite_desc, lfs_bwrite }, /* bwrite */ 177 { (struct vnodeop_desc*)NULL, (int(*)())NULL } 178 }; 179 struct vnodeopv_desc lfs_fifoop_opv_desc = 180 { &lfs_fifoop_p, lfs_fifoop_entries }; 181 #endif /* FIFO */ 182 183 /* 184 * Vnode op for reading. 185 */ 186 /* ARGSUSED */ 187 lfs_read(ap) 188 struct vop_read_args *ap; 189 { 190 register struct uio *uio = ap->a_uio; 191 register struct inode *ip = VTOI(ap->a_vp); 192 register struct lfs *fs; /* LFS */ 193 struct buf *bp; 194 daddr_t lbn, bn, rablock; 195 int size, error = 0; 196 long n, on, type; 197 off_t diff; 198 199 #ifdef VERBOSE 200 printf("lfs_read: ino %d\n", ip->i_number); 201 #endif 202 #ifdef DIAGNOSTIC 203 if (uio->uio_rw != UIO_READ) 204 panic("ufs_read mode"); 205 type = ip->i_mode & IFMT; 206 if (type != IFDIR && type != IFREG && type != IFLNK) 207 panic("ufs_read type"); 208 #endif 209 if (uio->uio_resid == 0) 210 return (0); 211 if (uio->uio_offset < 0) 212 return (EINVAL); 213 ip->i_flag |= IACC; 214 215 fs = ip->i_lfs; /* LFS */ 216 do { 217 lbn = lblkno(fs, uio->uio_offset); 218 on = blkoff(fs, uio->uio_offset); 219 n = MIN((unsigned)(fs->lfs_bsize - on), uio->uio_resid); 220 diff = ip->i_size - uio->uio_offset; 221 if (diff <= 0) 222 return (0); 223 if (diff < n) 224 n = diff; 225 size = blksize(fs); /* LFS */ 226 rablock = lbn + 1; 227 if (ap->a_vp->v_lastr + 1 == lbn && 228 lblktosize(fs, rablock) < ip->i_size) 229 error = breadn(ITOV(ip), lbn, size, &rablock, 230 &size, 1, NOCRED, &bp); 231 else 232 error = bread(ITOV(ip), lbn, size, NOCRED, &bp); 233 ap->a_vp->v_lastr = lbn; 234 n = MIN(n, size - bp->b_resid); 235 if (error) { 236 brelse(bp); 237 return (error); 238 } 239 error = uiomove(bp->b_un.b_addr + on, (int)n, uio); 240 if (n + on == fs->lfs_bsize || uio->uio_offset == ip->i_size) 241 bp->b_flags |= B_AGE; 242 brelse(bp); 243 } while (error == 0 && uio->uio_resid > 0 && n != 0); 244 return (error); 245 } 246 247 /* 248 * Vnode op for writing. 249 */ 250 lfs_write(ap) 251 struct vop_write_args *ap; 252 { 253 USES_VOP_TRUNCATE; 254 USES_VOP_UPDATE; 255 register struct vnode *vp = ap->a_vp; 256 register struct uio *uio = ap->a_uio; 257 struct proc *p = uio->uio_procp; 258 register struct inode *ip = VTOI(vp); 259 register struct lfs *fs; 260 register ioflag = ap->a_ioflag; 261 struct buf *bp; 262 daddr_t lbn; 263 off_t osize; 264 int n, on, flags, newblock; 265 int size, resid, error = 0; 266 267 #ifdef VERBOSE 268 printf("lfs_write ino %d\n", ip->i_number); 269 #endif 270 #ifdef DIAGNOSTIC 271 if (uio->uio_rw != UIO_WRITE) 272 panic("lfs_write mode"); 273 #endif 274 switch (vp->v_type) { 275 case VREG: 276 if (ioflag & IO_APPEND) 277 uio->uio_offset = ip->i_size; 278 /* fall through */ 279 case VLNK: 280 break; 281 282 case VDIR: 283 /* XXX This may not be correct for LFS. */ 284 if ((ioflag & IO_SYNC) == 0) 285 panic("lfs_write nonsync dir write"); 286 break; 287 288 default: 289 panic("lfs_write type"); 290 } 291 if (uio->uio_offset < 0) 292 return (EINVAL); 293 if (uio->uio_resid == 0) 294 return (0); 295 /* 296 * Maybe this should be above the vnode op call, but so long as 297 * file servers have no limits, i don't think it matters 298 */ 299 if (vp->v_type == VREG && p && 300 uio->uio_offset + uio->uio_resid > 301 p->p_rlimit[RLIMIT_FSIZE].rlim_cur) { 302 psignal(p, SIGXFSZ); 303 return (EFBIG); 304 } 305 resid = uio->uio_resid; 306 osize = ip->i_size; 307 fs = ip->i_lfs; /* LFS */ 308 flags = 0; 309 #ifdef NOTLFS 310 if (ioflag & IO_SYNC) 311 flags = B_SYNC; 312 #endif 313 do { 314 lbn = lblkno(fs, uio->uio_offset); 315 on = blkoff(fs, uio->uio_offset); 316 n = MIN((unsigned)(fs->lfs_bsize - on), uio->uio_resid); 317 if (error = lfs_balloc(vp, n, lbn, &bp)) 318 break; 319 if (uio->uio_offset + n > ip->i_size) { 320 ip->i_size = uio->uio_offset + n; 321 vnode_pager_setsize(vp, (u_long)ip->i_size); 322 } 323 size = blksize(fs); 324 (void) vnode_pager_uncache(vp); 325 n = MIN(n, size - bp->b_resid); 326 error = uiomove(bp->b_un.b_addr + on, n, uio); 327 #ifdef NOTLFS /* LFS */ 328 if (ioflag & IO_SYNC) 329 (void) bwrite(bp); 330 else if (n + on == fs->fs_bsize) { 331 bp->b_flags |= B_AGE; 332 bawrite(bp); 333 } else 334 bdwrite(bp); 335 ip->i_flag |= IUPD|ICHG; 336 #else 337 /* XXX This doesn't handle IO_SYNC. */ 338 LFS_UBWRITE(bp); 339 #endif 340 if (ap->a_cred->cr_uid != 0) 341 ip->i_mode &= ~(ISUID|ISGID); 342 } while (error == 0 && uio->uio_resid > 0 && n != 0); 343 if (error && (ioflag & IO_UNIT)) { 344 (void)VOP_TRUNCATE(vp, osize, ioflag & IO_SYNC, ap->a_cred); 345 uio->uio_offset -= resid - uio->uio_resid; 346 uio->uio_resid = resid; 347 } 348 if (!error && (ioflag & IO_SYNC)) 349 error = VOP_UPDATE(vp, &time, &time, 1); 350 return (error); 351 } 352 353 /* 354 * Synch an open file. 355 */ 356 /* ARGSUSED */ 357 lfs_fsync(ap) 358 struct vop_fsync_args *ap; 359 { 360 USES_VOP_UPDATE; 361 struct inode *ip; 362 363 #ifdef VERBOSE 364 printf("lfs_fsync\n"); 365 #endif 366 ip = VTOI(ap->a_vp); 367 if (ap->a_fflags & FWRITE) 368 ip->i_flag |= ICHG; 369 return (VOP_UPDATE(ap->a_vp, &time, &time, ap->a_waitfor == MNT_WAIT)); 370 } 371 372 /* 373 * Last reference to an inode, write the inode out and if necessary, 374 * truncate and deallocate the file. 375 */ 376 int 377 lfs_inactive(ap) 378 struct vop_inactive_args *ap; 379 { 380 USES_VOP_TRUNCATE; 381 USES_VOP_UPDATE; 382 USES_VOP_VFREE; 383 extern int prtactive; 384 register struct vnode *vp = ap->a_vp; 385 register struct inode *ip; 386 int mode, error; 387 388 #ifdef VERBOSE 389 printf("lfs_inactive\n"); 390 #endif 391 if (prtactive && vp->v_usecount != 0) 392 vprint("lfs_inactive: pushing active", vp); 393 394 /* Get rid of inodes related to stale file handles. */ 395 ip = VTOI(vp); 396 if (ip->i_mode == 0) { 397 if ((vp->v_flag & VXLOCK) == 0) 398 vgone(vp); 399 return (0); 400 } 401 402 error = 0; 403 ILOCK(ip); 404 if (ip->i_nlink <= 0 && (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 405 #ifdef QUOTA 406 if (!getinoquota(ip)) 407 (void)chkiq(ip, -1, NOCRED, 0); 408 #endif 409 error = VOP_TRUNCATE(vp, (off_t)0, 0, NOCRED); 410 mode = ip->i_mode; 411 ip->i_mode = 0; 412 ip->i_rdev = 0; 413 ip->i_flag |= IUPD|ICHG; 414 VOP_VFREE(vp, ip->i_number, mode); 415 } 416 if (ip->i_flag&(IUPD|IACC|ICHG|IMOD)) 417 VOP_UPDATE(vp, &time, &time, 0); 418 IUNLOCK(ip); 419 ip->i_flag = 0; 420 /* 421 * If we are done with the inode, reclaim it 422 * so that it can be reused immediately. 423 */ 424 if (vp->v_usecount == 0 && ip->i_mode == 0) 425 vgone(vp); 426 return (error); 427 } 428