Lines Matching refs:ofs
227 static void ovl_free_fs(struct ovl_fs *ofs) in ovl_free_fs() argument
232 iput(ofs->workbasedir_trap); in ovl_free_fs()
233 iput(ofs->indexdir_trap); in ovl_free_fs()
234 iput(ofs->workdir_trap); in ovl_free_fs()
235 dput(ofs->whiteout); in ovl_free_fs()
236 dput(ofs->indexdir); in ovl_free_fs()
237 dput(ofs->workdir); in ovl_free_fs()
238 if (ofs->workdir_locked) in ovl_free_fs()
239 ovl_inuse_unlock(ofs->workbasedir); in ovl_free_fs()
240 dput(ofs->workbasedir); in ovl_free_fs()
241 if (ofs->upperdir_locked) in ovl_free_fs()
242 ovl_inuse_unlock(ovl_upper_mnt(ofs)->mnt_root); in ovl_free_fs()
245 mounts = (struct vfsmount **) ofs->layers; in ovl_free_fs()
246 for (i = 0; i < ofs->numlayer; i++) { in ovl_free_fs()
247 iput(ofs->layers[i].trap); in ovl_free_fs()
248 mounts[i] = ofs->layers[i].mnt; in ovl_free_fs()
250 kern_unmount_array(mounts, ofs->numlayer); in ovl_free_fs()
251 kfree(ofs->layers); in ovl_free_fs()
252 for (i = 0; i < ofs->numfs; i++) in ovl_free_fs()
253 free_anon_bdev(ofs->fs[i].pseudo_dev); in ovl_free_fs()
254 kfree(ofs->fs); in ovl_free_fs()
256 kfree(ofs->config.lowerdir); in ovl_free_fs()
257 kfree(ofs->config.upperdir); in ovl_free_fs()
258 kfree(ofs->config.workdir); in ovl_free_fs()
259 kfree(ofs->config.redirect_mode); in ovl_free_fs()
260 if (ofs->creator_cred) in ovl_free_fs()
261 put_cred(ofs->creator_cred); in ovl_free_fs()
262 kfree(ofs); in ovl_free_fs()
267 struct ovl_fs *ofs = sb->s_fs_info; in ovl_put_super() local
269 ovl_free_fs(ofs); in ovl_put_super()
275 struct ovl_fs *ofs = sb->s_fs_info; in ovl_sync_fs() local
279 ret = ovl_sync_status(ofs); in ovl_sync_fs()
304 upper_sb = ovl_upper_mnt(ofs)->mnt_sb; in ovl_sync_fs()
323 struct ovl_fs *ofs = dentry->d_sb->s_fs_info; in ovl_statfs() local
332 buf->f_namelen = ofs->namelen; in ovl_statfs()
340 static bool ovl_force_readonly(struct ovl_fs *ofs) in ovl_force_readonly() argument
342 return (!ovl_upper_mnt(ofs) || !ofs->workdir); in ovl_force_readonly()
370 struct ovl_fs *ofs = sb->s_fs_info; in ovl_show_options() local
372 seq_show_option(m, "lowerdir", ofs->config.lowerdir); in ovl_show_options()
373 if (ofs->config.upperdir) { in ovl_show_options()
374 seq_show_option(m, "upperdir", ofs->config.upperdir); in ovl_show_options()
375 seq_show_option(m, "workdir", ofs->config.workdir); in ovl_show_options()
377 if (ofs->config.default_permissions) in ovl_show_options()
379 if (strcmp(ofs->config.redirect_mode, ovl_redirect_mode_def()) != 0) in ovl_show_options()
380 seq_printf(m, ",redirect_dir=%s", ofs->config.redirect_mode); in ovl_show_options()
381 if (ofs->config.index != ovl_index_def) in ovl_show_options()
382 seq_printf(m, ",index=%s", ofs->config.index ? "on" : "off"); in ovl_show_options()
383 if (!ofs->config.uuid) in ovl_show_options()
385 if (ofs->config.nfs_export != ovl_nfs_export_def) in ovl_show_options()
386 seq_printf(m, ",nfs_export=%s", ofs->config.nfs_export ? in ovl_show_options()
388 if (ofs->config.xino != ovl_xino_def() && !ovl_same_fs(sb)) in ovl_show_options()
389 seq_printf(m, ",xino=%s", ovl_xino_str[ofs->config.xino]); in ovl_show_options()
390 if (ofs->config.metacopy != ovl_metacopy_def) in ovl_show_options()
392 ofs->config.metacopy ? "on" : "off"); in ovl_show_options()
393 if (ofs->config.ovl_volatile) in ovl_show_options()
395 if (ofs->config.userxattr) in ovl_show_options()
397 if (ofs->config.override_creds != ovl_override_creds_def) in ovl_show_options()
399 ofs->config.override_creds ? "on" : "off"); in ovl_show_options()
405 struct ovl_fs *ofs = sb->s_fs_info; in ovl_remount() local
409 if (!(*flags & SB_RDONLY) && ovl_force_readonly(ofs)) in ovl_remount()
413 upper_sb = ovl_upper_mnt(ofs)->mnt_sb; in ovl_remount()
414 if (ovl_should_sync(ofs)) { in ovl_remount()
781 static struct dentry *ovl_workdir_create(struct ovl_fs *ofs, in ovl_workdir_create() argument
784 struct inode *dir = ofs->workbasedir->d_inode; in ovl_workdir_create()
785 struct vfsmount *mnt = ovl_upper_mnt(ofs); in ovl_workdir_create()
792 work = lookup_one_len(name, ofs->workbasedir, strlen(name)); in ovl_workdir_create()
868 ofs->config.workdir, name, -err); in ovl_workdir_create()
940 static int ovl_check_namelen(struct path *path, struct ovl_fs *ofs, in ovl_check_namelen() argument
949 ofs->namelen = max(ofs->namelen, statfs.f_namelen); in ovl_check_namelen()
955 struct ovl_fs *ofs, int *stack_depth) in ovl_lower_dir() argument
964 err = ovl_check_namelen(path, ofs, name); in ovl_lower_dir()
975 if ((ofs->config.nfs_export || in ovl_lower_dir()
976 (ofs->config.index && ofs->config.upperdir)) && !fh_type) { in ovl_lower_dir()
977 ofs->config.index = false; in ovl_lower_dir()
978 ofs->config.nfs_export = false; in ovl_lower_dir()
986 if (ofs->config.xino == OVL_XINO_AUTO && in ovl_lower_dir()
987 ofs->config.upperdir && !fh_type) { in ovl_lower_dir()
988 ofs->config.xino = OVL_XINO_OFF; in ovl_lower_dir()
995 ofs->xino_mode = -1; in ovl_lower_dir()
1206 static int ovl_report_in_use(struct ovl_fs *ofs, const char *name) in ovl_report_in_use() argument
1208 if (ofs->config.index) { in ovl_report_in_use()
1219 static int ovl_get_upper(struct super_block *sb, struct ovl_fs *ofs, in ovl_get_upper() argument
1225 err = ovl_mount_dir(ofs->config.upperdir, upperpath); in ovl_get_upper()
1236 err = ovl_check_namelen(upperpath, ofs, ofs->config.upperdir); in ovl_get_upper()
1270 if (ovl_inuse_trylock(ovl_upper_mnt(ofs)->mnt_root)) { in ovl_get_upper()
1271 ofs->upperdir_locked = true; in ovl_get_upper()
1273 err = ovl_report_in_use(ofs, "upperdir"); in ovl_get_upper()
1364 static int ovl_create_volatile_dirty(struct ovl_fs *ofs) in ovl_create_volatile_dirty() argument
1367 struct dentry *d = dget(ofs->workbasedir); in ovl_create_volatile_dirty()
1382 static int ovl_make_workdir(struct super_block *sb, struct ovl_fs *ofs, in ovl_make_workdir() argument
1385 struct vfsmount *mnt = ovl_upper_mnt(ofs); in ovl_make_workdir()
1396 workdir = ovl_workdir_create(ofs, OVL_WORKDIR_NAME, false); in ovl_make_workdir()
1401 ofs->workdir = workdir; in ovl_make_workdir()
1403 err = ovl_setup_trap(sb, ofs->workdir, &ofs->workdir_trap, "workdir"); in ovl_make_workdir()
1422 temp = ovl_do_tmpfile(ofs->workdir, S_IFREG | 0); in ovl_make_workdir()
1423 ofs->tmpfile = !IS_ERR(temp); in ovl_make_workdir()
1424 if (ofs->tmpfile) in ovl_make_workdir()
1431 err = ovl_check_rename_whiteout(ofs->workdir); in ovl_make_workdir()
1442 err = ovl_do_setxattr(ofs, ofs->workdir, OVL_XATTR_OPAQUE, "0", 1); in ovl_make_workdir()
1445 ofs->noxattr = true; in ovl_make_workdir()
1446 if (ofs->config.index || ofs->config.metacopy) { in ovl_make_workdir()
1447 ofs->config.index = false; in ovl_make_workdir()
1448 ofs->config.metacopy = false; in ovl_make_workdir()
1455 if (ofs->config.xino == OVL_XINO_AUTO) { in ovl_make_workdir()
1456 ofs->config.xino = OVL_XINO_OFF; in ovl_make_workdir()
1459 if (err == -EPERM && !ofs->config.userxattr) in ovl_make_workdir()
1463 ovl_do_removexattr(ofs, ofs->workdir, OVL_XATTR_OPAQUE); in ovl_make_workdir()
1471 if (ovl_dentry_remote(ofs->workdir) && in ovl_make_workdir()
1472 (!d_type || !rename_whiteout || ofs->noxattr)) { in ovl_make_workdir()
1482 if (ofs->config.ovl_volatile) { in ovl_make_workdir()
1483 err = ovl_create_volatile_dirty(ofs); in ovl_make_workdir()
1491 fh_type = ovl_can_decode_fh(ofs->workdir->d_sb); in ovl_make_workdir()
1492 if (ofs->config.index && !fh_type) { in ovl_make_workdir()
1493 ofs->config.index = false; in ovl_make_workdir()
1499 ofs->xino_mode = -1; in ovl_make_workdir()
1502 if (ofs->config.nfs_export && !ofs->config.index) { in ovl_make_workdir()
1504 ofs->config.nfs_export = false; in ovl_make_workdir()
1511 static int ovl_get_workdir(struct super_block *sb, struct ovl_fs *ofs, in ovl_get_workdir() argument
1517 err = ovl_mount_dir(ofs->config.workdir, &workpath); in ovl_get_workdir()
1531 ofs->workbasedir = dget(workpath.dentry); in ovl_get_workdir()
1533 if (ovl_inuse_trylock(ofs->workbasedir)) { in ovl_get_workdir()
1534 ofs->workdir_locked = true; in ovl_get_workdir()
1536 err = ovl_report_in_use(ofs, "workdir"); in ovl_get_workdir()
1541 err = ovl_setup_trap(sb, ofs->workbasedir, &ofs->workbasedir_trap, in ovl_get_workdir()
1546 err = ovl_make_workdir(sb, ofs, &workpath); in ovl_get_workdir()
1554 static int ovl_get_indexdir(struct super_block *sb, struct ovl_fs *ofs, in ovl_get_indexdir() argument
1557 struct vfsmount *mnt = ovl_upper_mnt(ofs); in ovl_get_indexdir()
1566 err = ovl_verify_origin(ofs, upperpath->dentry, in ovl_get_indexdir()
1574 iput(ofs->workdir_trap); in ovl_get_indexdir()
1575 ofs->workdir_trap = NULL; in ovl_get_indexdir()
1576 dput(ofs->workdir); in ovl_get_indexdir()
1577 ofs->workdir = NULL; in ovl_get_indexdir()
1578 indexdir = ovl_workdir_create(ofs, OVL_INDEXDIR_NAME, true); in ovl_get_indexdir()
1582 ofs->indexdir = indexdir; in ovl_get_indexdir()
1583 ofs->workdir = dget(indexdir); in ovl_get_indexdir()
1585 err = ovl_setup_trap(sb, ofs->indexdir, &ofs->indexdir_trap, in ovl_get_indexdir()
1598 if (ovl_check_origin_xattr(ofs, ofs->indexdir)) { in ovl_get_indexdir()
1599 err = ovl_verify_set_fh(ofs, ofs->indexdir, in ovl_get_indexdir()
1605 err = ovl_verify_upper(ofs, ofs->indexdir, upperpath->dentry, in ovl_get_indexdir()
1612 err = ovl_indexdir_cleanup(ofs); in ovl_get_indexdir()
1614 if (err || !ofs->indexdir) in ovl_get_indexdir()
1622 static bool ovl_lower_uuid_ok(struct ovl_fs *ofs, const uuid_t *uuid) in ovl_lower_uuid_ok() argument
1626 if (!ofs->config.nfs_export && !ovl_upper_mnt(ofs)) in ovl_lower_uuid_ok()
1637 if (ovl_allow_offline_changes(ofs) && uuid_is_null(uuid)) in ovl_lower_uuid_ok()
1640 for (i = 0; i < ofs->numfs; i++) { in ovl_lower_uuid_ok()
1648 if (ofs->fs[i].is_lower && in ovl_lower_uuid_ok()
1649 uuid_equal(&ofs->fs[i].sb->s_uuid, uuid)) { in ovl_lower_uuid_ok()
1650 ofs->fs[i].bad_uuid = true; in ovl_lower_uuid_ok()
1658 static int ovl_get_fsid(struct ovl_fs *ofs, const struct path *path) in ovl_get_fsid() argument
1667 for (i = 0; i < ofs->numfs; i++) { in ovl_get_fsid()
1668 if (ofs->fs[i].sb == sb) in ovl_get_fsid()
1672 if (!ovl_lower_uuid_ok(ofs, &sb->s_uuid)) { in ovl_get_fsid()
1674 if (ofs->config.xino == OVL_XINO_AUTO) { in ovl_get_fsid()
1675 ofs->config.xino = OVL_XINO_OFF; in ovl_get_fsid()
1678 if (ofs->config.index || ofs->config.nfs_export) { in ovl_get_fsid()
1679 ofs->config.index = false; in ovl_get_fsid()
1680 ofs->config.nfs_export = false; in ovl_get_fsid()
1687 path->dentry, ovl_xino_str[ofs->config.xino]); in ovl_get_fsid()
1697 ofs->fs[ofs->numfs].sb = sb; in ovl_get_fsid()
1698 ofs->fs[ofs->numfs].pseudo_dev = dev; in ovl_get_fsid()
1699 ofs->fs[ofs->numfs].bad_uuid = bad_uuid; in ovl_get_fsid()
1701 return ofs->numfs++; in ovl_get_fsid()
1704 static int ovl_get_layers(struct super_block *sb, struct ovl_fs *ofs, in ovl_get_layers() argument
1712 ofs->fs = kcalloc(numlower + 1, sizeof(struct ovl_sb), GFP_KERNEL); in ovl_get_layers()
1713 if (ofs->fs == NULL) in ovl_get_layers()
1717 ofs->numfs++; in ovl_get_layers()
1725 err = get_anon_bdev(&ofs->fs[0].pseudo_dev); in ovl_get_layers()
1731 if (ovl_upper_mnt(ofs)) { in ovl_get_layers()
1732 ofs->fs[0].sb = ovl_upper_mnt(ofs)->mnt_sb; in ovl_get_layers()
1733 ofs->fs[0].is_lower = false; in ovl_get_layers()
1741 err = fsid = ovl_get_fsid(ofs, &stack[i]); in ovl_get_layers()
1757 err = ovl_report_in_use(ofs, "lowerdir"); in ovl_get_layers()
1778 layers[ofs->numlayer].trap = trap; in ovl_get_layers()
1779 layers[ofs->numlayer].mnt = mnt; in ovl_get_layers()
1780 layers[ofs->numlayer].idx = ofs->numlayer; in ovl_get_layers()
1781 layers[ofs->numlayer].fsid = fsid; in ovl_get_layers()
1782 layers[ofs->numlayer].fs = &ofs->fs[fsid]; in ovl_get_layers()
1783 ofs->numlayer++; in ovl_get_layers()
1784 ofs->fs[fsid].is_lower = true; in ovl_get_layers()
1796 if (ofs->numfs - !ovl_upper_mnt(ofs) == 1) { in ovl_get_layers()
1797 if (ofs->config.xino == OVL_XINO_ON) in ovl_get_layers()
1799 ofs->xino_mode = 0; in ovl_get_layers()
1800 } else if (ofs->config.xino == OVL_XINO_OFF) { in ovl_get_layers()
1801 ofs->xino_mode = -1; in ovl_get_layers()
1802 } else if (ofs->xino_mode < 0) { in ovl_get_layers()
1811 ofs->xino_mode = ilog2(ofs->numfs - 1) + 2; in ovl_get_layers()
1814 if (ofs->xino_mode > 0) { in ovl_get_layers()
1816 ofs->xino_mode); in ovl_get_layers()
1826 struct ovl_fs *ofs, struct ovl_layer *layers) in ovl_get_lowerstack() argument
1833 if (!ofs->config.upperdir && numlower == 1) { in ovl_get_lowerstack()
1844 err = ovl_lower_dir(lower, &stack[i], ofs, &sb->s_stack_depth); in ovl_get_lowerstack()
1858 err = ovl_get_layers(sb, ofs, stack, numlower, layers); in ovl_get_lowerstack()
1869 oe->lowerstack[i].layer = &ofs->layers[i+1]; in ovl_get_lowerstack()
1889 static int ovl_check_layer(struct super_block *sb, struct ovl_fs *ofs, in ovl_check_layer() argument
1907 err = ovl_report_in_use(ofs, name); in ovl_check_layer()
1923 struct ovl_fs *ofs) in ovl_check_overlapping_layers() argument
1927 if (ovl_upper_mnt(ofs)) { in ovl_check_overlapping_layers()
1928 err = ovl_check_layer(sb, ofs, ovl_upper_mnt(ofs)->mnt_root, in ovl_check_overlapping_layers()
1940 err = ovl_check_layer(sb, ofs, ofs->workbasedir, "workdir", in ovl_check_overlapping_layers()
1946 for (i = 1; i < ofs->numlayer; i++) { in ovl_check_overlapping_layers()
1947 err = ovl_check_layer(sb, ofs, in ovl_check_overlapping_layers()
1948 ofs->layers[i].mnt->mnt_root, in ovl_check_overlapping_layers()
2000 struct ovl_fs *ofs; in ovl_fill_super() local
2014 ofs = kzalloc(sizeof(struct ovl_fs), GFP_KERNEL); in ovl_fill_super()
2015 if (!ofs) in ovl_fill_super()
2019 ofs->creator_cred = cred = prepare_creds(); in ovl_fill_super()
2024 ofs->share_whiteout = true; in ovl_fill_super()
2026 ofs->config.index = ovl_index_def; in ovl_fill_super()
2027 ofs->config.uuid = true; in ovl_fill_super()
2028 ofs->config.nfs_export = ovl_nfs_export_def; in ovl_fill_super()
2029 ofs->config.xino = ovl_xino_def(); in ovl_fill_super()
2030 ofs->config.metacopy = ovl_metacopy_def; in ovl_fill_super()
2031 err = ovl_parse_opt((char *) data, &ofs->config); in ovl_fill_super()
2036 if (!ofs->config.lowerdir) { in ovl_fill_super()
2043 splitlower = kstrdup(ofs->config.lowerdir, GFP_KERNEL); in ovl_fill_super()
2060 ofs->layers = layers; in ovl_fill_super()
2062 ofs->numlayer = 1; in ovl_fill_super()
2066 atomic_long_set(&ofs->last_ino, 1); in ovl_fill_super()
2068 if (ofs->config.xino != OVL_XINO_OFF) { in ovl_fill_super()
2069 ofs->xino_mode = BITS_PER_LONG - 32; in ovl_fill_super()
2070 if (!ofs->xino_mode) { in ovl_fill_super()
2072 ofs->config.xino = OVL_XINO_OFF; in ovl_fill_super()
2079 if (ofs->config.upperdir) { in ovl_fill_super()
2083 if (!ofs->config.workdir) { in ovl_fill_super()
2088 err = ovl_get_upper(sb, ofs, &layers[0], &upperpath); in ovl_fill_super()
2092 upper_sb = ovl_upper_mnt(ofs)->mnt_sb; in ovl_fill_super()
2093 if (!ovl_should_sync(ofs)) { in ovl_fill_super()
2094 ofs->errseq = errseq_sample(&upper_sb->s_wb_err); in ovl_fill_super()
2095 if (errseq_check(&upper_sb->s_wb_err, ofs->errseq)) { in ovl_fill_super()
2102 err = ovl_get_workdir(sb, ofs, &upperpath); in ovl_fill_super()
2106 if (!ofs->workdir) in ovl_fill_super()
2112 oe = ovl_get_lowerstack(sb, splitlower, numlower, ofs, layers); in ovl_fill_super()
2118 if (!ovl_upper_mnt(ofs)) in ovl_fill_super()
2121 if (!ofs->config.uuid && ofs->numfs > 1) { in ovl_fill_super()
2123 ofs->config.uuid = true; in ovl_fill_super()
2126 if (!ovl_force_readonly(ofs) && ofs->config.index) { in ovl_fill_super()
2127 err = ovl_get_indexdir(sb, ofs, oe, &upperpath); in ovl_fill_super()
2132 if (!ofs->indexdir) in ovl_fill_super()
2136 err = ovl_check_overlapping_layers(sb, ofs); in ovl_fill_super()
2141 if (!ofs->indexdir) { in ovl_fill_super()
2142 ofs->config.index = false; in ovl_fill_super()
2143 if (ovl_upper_mnt(ofs) && ofs->config.nfs_export) { in ovl_fill_super()
2145 ofs->config.nfs_export = false; in ovl_fill_super()
2149 if (ofs->config.metacopy && ofs->config.nfs_export) { in ovl_fill_super()
2151 ofs->config.nfs_export = false; in ovl_fill_super()
2154 if (ofs->config.nfs_export) in ovl_fill_super()
2161 sb->s_xattr = ofs->config.userxattr ? ovl_user_xattr_handlers : in ovl_fill_super()
2163 sb->s_fs_info = ofs; in ovl_fill_super()
2184 ovl_free_fs(ofs); in ovl_fill_super()