Lines Matching refs:ofs
212 static void ovl_free_fs(struct ovl_fs *ofs) in ovl_free_fs() argument
217 iput(ofs->workbasedir_trap); in ovl_free_fs()
218 iput(ofs->indexdir_trap); in ovl_free_fs()
219 iput(ofs->workdir_trap); in ovl_free_fs()
220 dput(ofs->whiteout); in ovl_free_fs()
221 dput(ofs->indexdir); in ovl_free_fs()
222 dput(ofs->workdir); in ovl_free_fs()
223 if (ofs->workdir_locked) in ovl_free_fs()
224 ovl_inuse_unlock(ofs->workbasedir); in ovl_free_fs()
225 dput(ofs->workbasedir); in ovl_free_fs()
226 if (ofs->upperdir_locked) in ovl_free_fs()
227 ovl_inuse_unlock(ovl_upper_mnt(ofs)->mnt_root); in ovl_free_fs()
230 mounts = (struct vfsmount **) ofs->layers; in ovl_free_fs()
231 for (i = 0; i < ofs->numlayer; i++) { in ovl_free_fs()
232 iput(ofs->layers[i].trap); in ovl_free_fs()
233 mounts[i] = ofs->layers[i].mnt; in ovl_free_fs()
235 kern_unmount_array(mounts, ofs->numlayer); in ovl_free_fs()
236 kfree(ofs->layers); in ovl_free_fs()
237 for (i = 0; i < ofs->numfs; i++) in ovl_free_fs()
238 free_anon_bdev(ofs->fs[i].pseudo_dev); in ovl_free_fs()
239 kfree(ofs->fs); in ovl_free_fs()
241 kfree(ofs->config.lowerdir); in ovl_free_fs()
242 kfree(ofs->config.upperdir); in ovl_free_fs()
243 kfree(ofs->config.workdir); in ovl_free_fs()
244 kfree(ofs->config.redirect_mode); in ovl_free_fs()
245 if (ofs->creator_cred) in ovl_free_fs()
246 put_cred(ofs->creator_cred); in ovl_free_fs()
247 kfree(ofs); in ovl_free_fs()
252 struct ovl_fs *ofs = sb->s_fs_info; in ovl_put_super() local
254 ovl_free_fs(ofs); in ovl_put_super()
260 struct ovl_fs *ofs = sb->s_fs_info; in ovl_sync_fs() local
264 if (!ovl_upper_mnt(ofs)) in ovl_sync_fs()
267 if (!ovl_should_sync(ofs)) in ovl_sync_fs()
280 upper_sb = ovl_upper_mnt(ofs)->mnt_sb; in ovl_sync_fs()
299 struct ovl_fs *ofs = dentry->d_sb->s_fs_info; in ovl_statfs() local
308 buf->f_namelen = ofs->namelen; in ovl_statfs()
316 static bool ovl_force_readonly(struct ovl_fs *ofs) in ovl_force_readonly() argument
318 return (!ovl_upper_mnt(ofs) || !ofs->workdir); in ovl_force_readonly()
346 struct ovl_fs *ofs = sb->s_fs_info; in ovl_show_options() local
348 seq_show_option(m, "lowerdir", ofs->config.lowerdir); in ovl_show_options()
349 if (ofs->config.upperdir) { in ovl_show_options()
350 seq_show_option(m, "upperdir", ofs->config.upperdir); in ovl_show_options()
351 seq_show_option(m, "workdir", ofs->config.workdir); in ovl_show_options()
353 if (ofs->config.default_permissions) in ovl_show_options()
355 if (strcmp(ofs->config.redirect_mode, ovl_redirect_mode_def()) != 0) in ovl_show_options()
356 seq_printf(m, ",redirect_dir=%s", ofs->config.redirect_mode); in ovl_show_options()
357 if (ofs->config.index != ovl_index_def) in ovl_show_options()
358 seq_printf(m, ",index=%s", ofs->config.index ? "on" : "off"); in ovl_show_options()
359 if (ofs->config.nfs_export != ovl_nfs_export_def) in ovl_show_options()
360 seq_printf(m, ",nfs_export=%s", ofs->config.nfs_export ? in ovl_show_options()
362 if (ofs->config.xino != ovl_xino_def() && !ovl_same_fs(sb)) in ovl_show_options()
363 seq_printf(m, ",xino=%s", ovl_xino_str[ofs->config.xino]); in ovl_show_options()
364 if (ofs->config.metacopy != ovl_metacopy_def) in ovl_show_options()
366 ofs->config.metacopy ? "on" : "off"); in ovl_show_options()
367 if (ofs->config.ovl_volatile) in ovl_show_options()
374 struct ovl_fs *ofs = sb->s_fs_info; in ovl_remount() local
378 if (!(*flags & SB_RDONLY) && ovl_force_readonly(ofs)) in ovl_remount()
382 upper_sb = ovl_upper_mnt(ofs)->mnt_sb; in ovl_remount()
383 if (ovl_should_sync(ofs)) { in ovl_remount()
697 static struct dentry *ovl_workdir_create(struct ovl_fs *ofs, in ovl_workdir_create() argument
700 struct inode *dir = ofs->workbasedir->d_inode; in ovl_workdir_create()
701 struct vfsmount *mnt = ovl_upper_mnt(ofs); in ovl_workdir_create()
708 work = lookup_one_len(name, ofs->workbasedir, strlen(name)); in ovl_workdir_create()
778 ofs->config.workdir, name, -err); in ovl_workdir_create()
846 static int ovl_check_namelen(struct path *path, struct ovl_fs *ofs, in ovl_check_namelen() argument
855 ofs->namelen = max(ofs->namelen, statfs.f_namelen); in ovl_check_namelen()
861 struct ovl_fs *ofs, int *stack_depth) in ovl_lower_dir() argument
870 err = ovl_check_namelen(path, ofs, name); in ovl_lower_dir()
881 if ((ofs->config.nfs_export || in ovl_lower_dir()
882 (ofs->config.index && ofs->config.upperdir)) && !fh_type) { in ovl_lower_dir()
883 ofs->config.index = false; in ovl_lower_dir()
884 ofs->config.nfs_export = false; in ovl_lower_dir()
891 ofs->xino_mode = -1; in ovl_lower_dir()
1086 static int ovl_report_in_use(struct ovl_fs *ofs, const char *name) in ovl_report_in_use() argument
1088 if (ofs->config.index) { in ovl_report_in_use()
1099 static int ovl_get_upper(struct super_block *sb, struct ovl_fs *ofs, in ovl_get_upper() argument
1105 err = ovl_mount_dir(ofs->config.upperdir, upperpath); in ovl_get_upper()
1116 err = ovl_check_namelen(upperpath, ofs, ofs->config.upperdir); in ovl_get_upper()
1150 if (ovl_inuse_trylock(ovl_upper_mnt(ofs)->mnt_root)) { in ovl_get_upper()
1151 ofs->upperdir_locked = true; in ovl_get_upper()
1153 err = ovl_report_in_use(ofs, "upperdir"); in ovl_get_upper()
1244 static int ovl_create_volatile_dirty(struct ovl_fs *ofs) in ovl_create_volatile_dirty() argument
1247 struct dentry *d = dget(ofs->workbasedir); in ovl_create_volatile_dirty()
1262 static int ovl_make_workdir(struct super_block *sb, struct ovl_fs *ofs, in ovl_make_workdir() argument
1265 struct vfsmount *mnt = ovl_upper_mnt(ofs); in ovl_make_workdir()
1276 workdir = ovl_workdir_create(ofs, OVL_WORKDIR_NAME, false); in ovl_make_workdir()
1281 ofs->workdir = workdir; in ovl_make_workdir()
1283 err = ovl_setup_trap(sb, ofs->workdir, &ofs->workdir_trap, "workdir"); in ovl_make_workdir()
1302 temp = ovl_do_tmpfile(ofs->workdir, S_IFREG | 0); in ovl_make_workdir()
1303 ofs->tmpfile = !IS_ERR(temp); in ovl_make_workdir()
1304 if (ofs->tmpfile) in ovl_make_workdir()
1311 err = ovl_check_rename_whiteout(ofs->workdir); in ovl_make_workdir()
1322 err = ovl_do_setxattr(ofs, ofs->workdir, OVL_XATTR_OPAQUE, "0", 1); in ovl_make_workdir()
1324 ofs->noxattr = true; in ovl_make_workdir()
1325 ofs->config.index = false; in ovl_make_workdir()
1326 ofs->config.metacopy = false; in ovl_make_workdir()
1330 ovl_do_removexattr(ofs, ofs->workdir, OVL_XATTR_OPAQUE); in ovl_make_workdir()
1338 if (ovl_dentry_remote(ofs->workdir) && in ovl_make_workdir()
1339 (!d_type || !rename_whiteout || ofs->noxattr)) { in ovl_make_workdir()
1349 if (ofs->config.ovl_volatile) { in ovl_make_workdir()
1350 err = ovl_create_volatile_dirty(ofs); in ovl_make_workdir()
1358 fh_type = ovl_can_decode_fh(ofs->workdir->d_sb); in ovl_make_workdir()
1359 if (ofs->config.index && !fh_type) { in ovl_make_workdir()
1360 ofs->config.index = false; in ovl_make_workdir()
1366 ofs->xino_mode = -1; in ovl_make_workdir()
1369 if (ofs->config.nfs_export && !ofs->config.index) { in ovl_make_workdir()
1371 ofs->config.nfs_export = false; in ovl_make_workdir()
1378 static int ovl_get_workdir(struct super_block *sb, struct ovl_fs *ofs, in ovl_get_workdir() argument
1384 err = ovl_mount_dir(ofs->config.workdir, &workpath); in ovl_get_workdir()
1398 ofs->workbasedir = dget(workpath.dentry); in ovl_get_workdir()
1400 if (ovl_inuse_trylock(ofs->workbasedir)) { in ovl_get_workdir()
1401 ofs->workdir_locked = true; in ovl_get_workdir()
1403 err = ovl_report_in_use(ofs, "workdir"); in ovl_get_workdir()
1408 err = ovl_setup_trap(sb, ofs->workbasedir, &ofs->workbasedir_trap, in ovl_get_workdir()
1413 err = ovl_make_workdir(sb, ofs, &workpath); in ovl_get_workdir()
1421 static int ovl_get_indexdir(struct super_block *sb, struct ovl_fs *ofs, in ovl_get_indexdir() argument
1424 struct vfsmount *mnt = ovl_upper_mnt(ofs); in ovl_get_indexdir()
1433 err = ovl_verify_origin(ofs, upperpath->dentry, in ovl_get_indexdir()
1441 iput(ofs->workdir_trap); in ovl_get_indexdir()
1442 ofs->workdir_trap = NULL; in ovl_get_indexdir()
1443 dput(ofs->workdir); in ovl_get_indexdir()
1444 ofs->workdir = NULL; in ovl_get_indexdir()
1445 indexdir = ovl_workdir_create(ofs, OVL_INDEXDIR_NAME, true); in ovl_get_indexdir()
1449 ofs->indexdir = indexdir; in ovl_get_indexdir()
1450 ofs->workdir = dget(indexdir); in ovl_get_indexdir()
1452 err = ovl_setup_trap(sb, ofs->indexdir, &ofs->indexdir_trap, in ovl_get_indexdir()
1465 if (ovl_check_origin_xattr(ofs, ofs->indexdir)) { in ovl_get_indexdir()
1466 err = ovl_verify_set_fh(ofs, ofs->indexdir, in ovl_get_indexdir()
1472 err = ovl_verify_upper(ofs, ofs->indexdir, upperpath->dentry, in ovl_get_indexdir()
1479 err = ovl_indexdir_cleanup(ofs); in ovl_get_indexdir()
1481 if (err || !ofs->indexdir) in ovl_get_indexdir()
1489 static bool ovl_lower_uuid_ok(struct ovl_fs *ofs, const uuid_t *uuid) in ovl_lower_uuid_ok() argument
1493 if (!ofs->config.nfs_export && !ovl_upper_mnt(ofs)) in ovl_lower_uuid_ok()
1504 if (!ofs->config.index && !ofs->config.metacopy && !ofs->config.xino && in ovl_lower_uuid_ok()
1508 for (i = 0; i < ofs->numfs; i++) { in ovl_lower_uuid_ok()
1516 if (ofs->fs[i].is_lower && in ovl_lower_uuid_ok()
1517 uuid_equal(&ofs->fs[i].sb->s_uuid, uuid)) { in ovl_lower_uuid_ok()
1518 ofs->fs[i].bad_uuid = true; in ovl_lower_uuid_ok()
1526 static int ovl_get_fsid(struct ovl_fs *ofs, const struct path *path) in ovl_get_fsid() argument
1534 for (i = 0; i < ofs->numfs; i++) { in ovl_get_fsid()
1535 if (ofs->fs[i].sb == sb) in ovl_get_fsid()
1539 if (!ovl_lower_uuid_ok(ofs, &sb->s_uuid)) { in ovl_get_fsid()
1541 if (ofs->config.index || ofs->config.nfs_export) { in ovl_get_fsid()
1542 ofs->config.index = false; in ovl_get_fsid()
1543 ofs->config.nfs_export = false; in ovl_get_fsid()
1557 ofs->fs[ofs->numfs].sb = sb; in ovl_get_fsid()
1558 ofs->fs[ofs->numfs].pseudo_dev = dev; in ovl_get_fsid()
1559 ofs->fs[ofs->numfs].bad_uuid = bad_uuid; in ovl_get_fsid()
1561 return ofs->numfs++; in ovl_get_fsid()
1564 static int ovl_get_layers(struct super_block *sb, struct ovl_fs *ofs, in ovl_get_layers() argument
1572 ofs->fs = kcalloc(numlower + 1, sizeof(struct ovl_sb), GFP_KERNEL); in ovl_get_layers()
1573 if (ofs->fs == NULL) in ovl_get_layers()
1577 ofs->numfs++; in ovl_get_layers()
1585 err = get_anon_bdev(&ofs->fs[0].pseudo_dev); in ovl_get_layers()
1591 if (ovl_upper_mnt(ofs)) { in ovl_get_layers()
1592 ofs->fs[0].sb = ovl_upper_mnt(ofs)->mnt_sb; in ovl_get_layers()
1593 ofs->fs[0].is_lower = false; in ovl_get_layers()
1601 err = fsid = ovl_get_fsid(ofs, &stack[i]); in ovl_get_layers()
1617 err = ovl_report_in_use(ofs, "lowerdir"); in ovl_get_layers()
1638 layers[ofs->numlayer].trap = trap; in ovl_get_layers()
1639 layers[ofs->numlayer].mnt = mnt; in ovl_get_layers()
1640 layers[ofs->numlayer].idx = ofs->numlayer; in ovl_get_layers()
1641 layers[ofs->numlayer].fsid = fsid; in ovl_get_layers()
1642 layers[ofs->numlayer].fs = &ofs->fs[fsid]; in ovl_get_layers()
1643 ofs->numlayer++; in ovl_get_layers()
1644 ofs->fs[fsid].is_lower = true; in ovl_get_layers()
1656 if (ofs->numfs - !ovl_upper_mnt(ofs) == 1) { in ovl_get_layers()
1657 if (ofs->config.xino == OVL_XINO_ON) in ovl_get_layers()
1659 ofs->xino_mode = 0; in ovl_get_layers()
1660 } else if (ofs->config.xino == OVL_XINO_OFF) { in ovl_get_layers()
1661 ofs->xino_mode = -1; in ovl_get_layers()
1662 } else if (ofs->xino_mode < 0) { in ovl_get_layers()
1671 ofs->xino_mode = ilog2(ofs->numfs - 1) + 2; in ovl_get_layers()
1674 if (ofs->xino_mode > 0) { in ovl_get_layers()
1676 ofs->xino_mode); in ovl_get_layers()
1686 struct ovl_fs *ofs, struct ovl_layer *layers) in ovl_get_lowerstack() argument
1693 if (!ofs->config.upperdir && numlower == 1) { in ovl_get_lowerstack()
1704 err = ovl_lower_dir(lower, &stack[i], ofs, &sb->s_stack_depth); in ovl_get_lowerstack()
1718 err = ovl_get_layers(sb, ofs, stack, numlower, layers); in ovl_get_lowerstack()
1729 oe->lowerstack[i].layer = &ofs->layers[i+1]; in ovl_get_lowerstack()
1749 static int ovl_check_layer(struct super_block *sb, struct ovl_fs *ofs, in ovl_check_layer() argument
1766 err = ovl_report_in_use(ofs, name); in ovl_check_layer()
1782 struct ovl_fs *ofs) in ovl_check_overlapping_layers() argument
1786 if (ovl_upper_mnt(ofs)) { in ovl_check_overlapping_layers()
1787 err = ovl_check_layer(sb, ofs, ovl_upper_mnt(ofs)->mnt_root, in ovl_check_overlapping_layers()
1799 err = ovl_check_layer(sb, ofs, ofs->workbasedir, "workdir"); in ovl_check_overlapping_layers()
1804 for (i = 1; i < ofs->numlayer; i++) { in ovl_check_overlapping_layers()
1805 err = ovl_check_layer(sb, ofs, in ovl_check_overlapping_layers()
1806 ofs->layers[i].mnt->mnt_root, in ovl_check_overlapping_layers()
1858 struct ovl_fs *ofs; in ovl_fill_super() local
1868 ofs = kzalloc(sizeof(struct ovl_fs), GFP_KERNEL); in ovl_fill_super()
1869 if (!ofs) in ovl_fill_super()
1872 ofs->creator_cred = cred = prepare_creds(); in ovl_fill_super()
1877 ofs->share_whiteout = true; in ovl_fill_super()
1879 ofs->config.index = ovl_index_def; in ovl_fill_super()
1880 ofs->config.nfs_export = ovl_nfs_export_def; in ovl_fill_super()
1881 ofs->config.xino = ovl_xino_def(); in ovl_fill_super()
1882 ofs->config.metacopy = ovl_metacopy_def; in ovl_fill_super()
1883 err = ovl_parse_opt((char *) data, &ofs->config); in ovl_fill_super()
1888 if (!ofs->config.lowerdir) { in ovl_fill_super()
1895 splitlower = kstrdup(ofs->config.lowerdir, GFP_KERNEL); in ovl_fill_super()
1910 ofs->layers = layers; in ovl_fill_super()
1912 ofs->numlayer = 1; in ovl_fill_super()
1916 atomic_long_set(&ofs->last_ino, 1); in ovl_fill_super()
1918 if (ofs->config.xino != OVL_XINO_OFF) { in ovl_fill_super()
1919 ofs->xino_mode = BITS_PER_LONG - 32; in ovl_fill_super()
1920 if (!ofs->xino_mode) { in ovl_fill_super()
1922 ofs->config.xino = OVL_XINO_OFF; in ovl_fill_super()
1929 if (ofs->config.upperdir) { in ovl_fill_super()
1930 if (!ofs->config.workdir) { in ovl_fill_super()
1935 err = ovl_get_upper(sb, ofs, &layers[0], &upperpath); in ovl_fill_super()
1939 err = ovl_get_workdir(sb, ofs, &upperpath); in ovl_fill_super()
1943 if (!ofs->workdir) in ovl_fill_super()
1946 sb->s_stack_depth = ovl_upper_mnt(ofs)->mnt_sb->s_stack_depth; in ovl_fill_super()
1947 sb->s_time_gran = ovl_upper_mnt(ofs)->mnt_sb->s_time_gran; in ovl_fill_super()
1950 oe = ovl_get_lowerstack(sb, splitlower, numlower, ofs, layers); in ovl_fill_super()
1956 if (!ovl_upper_mnt(ofs)) in ovl_fill_super()
1959 if (!ovl_force_readonly(ofs) && ofs->config.index) { in ovl_fill_super()
1960 err = ovl_get_indexdir(sb, ofs, oe, &upperpath); in ovl_fill_super()
1965 if (!ofs->indexdir) in ovl_fill_super()
1969 err = ovl_check_overlapping_layers(sb, ofs); in ovl_fill_super()
1974 if (!ofs->indexdir) { in ovl_fill_super()
1975 ofs->config.index = false; in ovl_fill_super()
1976 if (ovl_upper_mnt(ofs) && ofs->config.nfs_export) { in ovl_fill_super()
1978 ofs->config.nfs_export = false; in ovl_fill_super()
1982 if (ofs->config.metacopy && ofs->config.nfs_export) { in ovl_fill_super()
1984 ofs->config.nfs_export = false; in ovl_fill_super()
1987 if (ofs->config.nfs_export) in ovl_fill_super()
1995 sb->s_fs_info = ofs; in ovl_fill_super()
2017 ovl_free_fs(ofs); in ovl_fill_super()