Lines Matching refs:ofs
221 static void ovl_free_fs(struct ovl_fs *ofs) in ovl_free_fs() argument
226 iput(ofs->workbasedir_trap); in ovl_free_fs()
227 iput(ofs->indexdir_trap); in ovl_free_fs()
228 iput(ofs->workdir_trap); in ovl_free_fs()
229 dput(ofs->whiteout); in ovl_free_fs()
230 dput(ofs->indexdir); in ovl_free_fs()
231 dput(ofs->workdir); in ovl_free_fs()
232 if (ofs->workdir_locked) in ovl_free_fs()
233 ovl_inuse_unlock(ofs->workbasedir); in ovl_free_fs()
234 dput(ofs->workbasedir); in ovl_free_fs()
235 if (ofs->upperdir_locked) in ovl_free_fs()
236 ovl_inuse_unlock(ovl_upper_mnt(ofs)->mnt_root); in ovl_free_fs()
239 mounts = (struct vfsmount **) ofs->layers; in ovl_free_fs()
240 for (i = 0; i < ofs->numlayer; i++) { in ovl_free_fs()
241 iput(ofs->layers[i].trap); in ovl_free_fs()
242 mounts[i] = ofs->layers[i].mnt; in ovl_free_fs()
244 kern_unmount_array(mounts, ofs->numlayer); in ovl_free_fs()
245 kfree(ofs->layers); in ovl_free_fs()
246 for (i = 0; i < ofs->numfs; i++) in ovl_free_fs()
247 free_anon_bdev(ofs->fs[i].pseudo_dev); in ovl_free_fs()
248 kfree(ofs->fs); in ovl_free_fs()
250 kfree(ofs->config.lowerdir); in ovl_free_fs()
251 kfree(ofs->config.upperdir); in ovl_free_fs()
252 kfree(ofs->config.workdir); in ovl_free_fs()
253 kfree(ofs->config.redirect_mode); in ovl_free_fs()
254 if (ofs->creator_cred) in ovl_free_fs()
255 put_cred(ofs->creator_cred); in ovl_free_fs()
256 kfree(ofs); in ovl_free_fs()
261 struct ovl_fs *ofs = sb->s_fs_info; in ovl_put_super() local
263 ovl_free_fs(ofs); in ovl_put_super()
269 struct ovl_fs *ofs = sb->s_fs_info; in ovl_sync_fs() local
273 ret = ovl_sync_status(ofs); in ovl_sync_fs()
298 upper_sb = ovl_upper_mnt(ofs)->mnt_sb; in ovl_sync_fs()
317 struct ovl_fs *ofs = dentry->d_sb->s_fs_info; in ovl_statfs() local
326 buf->f_namelen = ofs->namelen; in ovl_statfs()
334 static bool ovl_force_readonly(struct ovl_fs *ofs) in ovl_force_readonly() argument
336 return (!ovl_upper_mnt(ofs) || !ofs->workdir); in ovl_force_readonly()
364 struct ovl_fs *ofs = sb->s_fs_info; in ovl_show_options() local
366 seq_show_option(m, "lowerdir", ofs->config.lowerdir); in ovl_show_options()
367 if (ofs->config.upperdir) { in ovl_show_options()
368 seq_show_option(m, "upperdir", ofs->config.upperdir); in ovl_show_options()
369 seq_show_option(m, "workdir", ofs->config.workdir); in ovl_show_options()
371 if (ofs->config.default_permissions) in ovl_show_options()
373 if (strcmp(ofs->config.redirect_mode, ovl_redirect_mode_def()) != 0) in ovl_show_options()
374 seq_printf(m, ",redirect_dir=%s", ofs->config.redirect_mode); in ovl_show_options()
375 if (ofs->config.index != ovl_index_def) in ovl_show_options()
376 seq_printf(m, ",index=%s", ofs->config.index ? "on" : "off"); in ovl_show_options()
377 if (ofs->config.nfs_export != ovl_nfs_export_def) in ovl_show_options()
378 seq_printf(m, ",nfs_export=%s", ofs->config.nfs_export ? in ovl_show_options()
380 if (ofs->config.xino != ovl_xino_def() && !ovl_same_fs(sb)) in ovl_show_options()
381 seq_printf(m, ",xino=%s", ovl_xino_str[ofs->config.xino]); in ovl_show_options()
382 if (ofs->config.metacopy != ovl_metacopy_def) in ovl_show_options()
384 ofs->config.metacopy ? "on" : "off"); in ovl_show_options()
385 if (ofs->config.ovl_volatile) in ovl_show_options()
387 if (ofs->config.override_creds != ovl_override_creds_def) in ovl_show_options()
389 ofs->config.override_creds ? "on" : "off"); in ovl_show_options()
395 struct ovl_fs *ofs = sb->s_fs_info; in ovl_remount() local
399 if (!(*flags & SB_RDONLY) && ovl_force_readonly(ofs)) in ovl_remount()
403 upper_sb = ovl_upper_mnt(ofs)->mnt_sb; in ovl_remount()
404 if (ovl_should_sync(ofs)) { in ovl_remount()
731 static struct dentry *ovl_workdir_create(struct ovl_fs *ofs, in ovl_workdir_create() argument
734 struct inode *dir = ofs->workbasedir->d_inode; in ovl_workdir_create()
735 struct vfsmount *mnt = ovl_upper_mnt(ofs); in ovl_workdir_create()
742 work = lookup_one_len(name, ofs->workbasedir, strlen(name)); in ovl_workdir_create()
816 ofs->config.workdir, name, -err); in ovl_workdir_create()
884 static int ovl_check_namelen(struct path *path, struct ovl_fs *ofs, in ovl_check_namelen() argument
893 ofs->namelen = max(ofs->namelen, statfs.f_namelen); in ovl_check_namelen()
899 struct ovl_fs *ofs, int *stack_depth) in ovl_lower_dir() argument
908 err = ovl_check_namelen(path, ofs, name); in ovl_lower_dir()
919 if ((ofs->config.nfs_export || in ovl_lower_dir()
920 (ofs->config.index && ofs->config.upperdir)) && !fh_type) { in ovl_lower_dir()
921 ofs->config.index = false; in ovl_lower_dir()
922 ofs->config.nfs_export = false; in ovl_lower_dir()
929 ofs->xino_mode = -1; in ovl_lower_dir()
1126 static int ovl_report_in_use(struct ovl_fs *ofs, const char *name) in ovl_report_in_use() argument
1128 if (ofs->config.index) { in ovl_report_in_use()
1139 static int ovl_get_upper(struct super_block *sb, struct ovl_fs *ofs, in ovl_get_upper() argument
1145 err = ovl_mount_dir(ofs->config.upperdir, upperpath); in ovl_get_upper()
1156 err = ovl_check_namelen(upperpath, ofs, ofs->config.upperdir); in ovl_get_upper()
1190 if (ovl_inuse_trylock(ovl_upper_mnt(ofs)->mnt_root)) { in ovl_get_upper()
1191 ofs->upperdir_locked = true; in ovl_get_upper()
1193 err = ovl_report_in_use(ofs, "upperdir"); in ovl_get_upper()
1284 static int ovl_create_volatile_dirty(struct ovl_fs *ofs) in ovl_create_volatile_dirty() argument
1287 struct dentry *d = dget(ofs->workbasedir); in ovl_create_volatile_dirty()
1302 static int ovl_make_workdir(struct super_block *sb, struct ovl_fs *ofs, in ovl_make_workdir() argument
1305 struct vfsmount *mnt = ovl_upper_mnt(ofs); in ovl_make_workdir()
1316 workdir = ovl_workdir_create(ofs, OVL_WORKDIR_NAME, false); in ovl_make_workdir()
1321 ofs->workdir = workdir; in ovl_make_workdir()
1323 err = ovl_setup_trap(sb, ofs->workdir, &ofs->workdir_trap, "workdir"); in ovl_make_workdir()
1342 temp = ovl_do_tmpfile(ofs->workdir, S_IFREG | 0); in ovl_make_workdir()
1343 ofs->tmpfile = !IS_ERR(temp); in ovl_make_workdir()
1344 if (ofs->tmpfile) in ovl_make_workdir()
1351 err = ovl_check_rename_whiteout(ofs->workdir); in ovl_make_workdir()
1362 err = ovl_do_setxattr(ofs, ofs->workdir, OVL_XATTR_OPAQUE, "0", 1); in ovl_make_workdir()
1364 ofs->noxattr = true; in ovl_make_workdir()
1365 ofs->config.index = false; in ovl_make_workdir()
1366 ofs->config.metacopy = false; in ovl_make_workdir()
1370 ovl_do_removexattr(ofs, ofs->workdir, OVL_XATTR_OPAQUE); in ovl_make_workdir()
1378 if (ovl_dentry_remote(ofs->workdir) && in ovl_make_workdir()
1379 (!d_type || !rename_whiteout || ofs->noxattr)) { in ovl_make_workdir()
1389 if (ofs->config.ovl_volatile) { in ovl_make_workdir()
1390 err = ovl_create_volatile_dirty(ofs); in ovl_make_workdir()
1398 fh_type = ovl_can_decode_fh(ofs->workdir->d_sb); in ovl_make_workdir()
1399 if (ofs->config.index && !fh_type) { in ovl_make_workdir()
1400 ofs->config.index = false; in ovl_make_workdir()
1406 ofs->xino_mode = -1; in ovl_make_workdir()
1409 if (ofs->config.nfs_export && !ofs->config.index) { in ovl_make_workdir()
1411 ofs->config.nfs_export = false; in ovl_make_workdir()
1418 static int ovl_get_workdir(struct super_block *sb, struct ovl_fs *ofs, in ovl_get_workdir() argument
1424 err = ovl_mount_dir(ofs->config.workdir, &workpath); in ovl_get_workdir()
1438 ofs->workbasedir = dget(workpath.dentry); in ovl_get_workdir()
1440 if (ovl_inuse_trylock(ofs->workbasedir)) { in ovl_get_workdir()
1441 ofs->workdir_locked = true; in ovl_get_workdir()
1443 err = ovl_report_in_use(ofs, "workdir"); in ovl_get_workdir()
1448 err = ovl_setup_trap(sb, ofs->workbasedir, &ofs->workbasedir_trap, in ovl_get_workdir()
1453 err = ovl_make_workdir(sb, ofs, &workpath); in ovl_get_workdir()
1461 static int ovl_get_indexdir(struct super_block *sb, struct ovl_fs *ofs, in ovl_get_indexdir() argument
1464 struct vfsmount *mnt = ovl_upper_mnt(ofs); in ovl_get_indexdir()
1473 err = ovl_verify_origin(ofs, upperpath->dentry, in ovl_get_indexdir()
1481 iput(ofs->workdir_trap); in ovl_get_indexdir()
1482 ofs->workdir_trap = NULL; in ovl_get_indexdir()
1483 dput(ofs->workdir); in ovl_get_indexdir()
1484 ofs->workdir = NULL; in ovl_get_indexdir()
1485 indexdir = ovl_workdir_create(ofs, OVL_INDEXDIR_NAME, true); in ovl_get_indexdir()
1489 ofs->indexdir = indexdir; in ovl_get_indexdir()
1490 ofs->workdir = dget(indexdir); in ovl_get_indexdir()
1492 err = ovl_setup_trap(sb, ofs->indexdir, &ofs->indexdir_trap, in ovl_get_indexdir()
1505 if (ovl_check_origin_xattr(ofs, ofs->indexdir)) { in ovl_get_indexdir()
1506 err = ovl_verify_set_fh(ofs, ofs->indexdir, in ovl_get_indexdir()
1512 err = ovl_verify_upper(ofs, ofs->indexdir, upperpath->dentry, in ovl_get_indexdir()
1519 err = ovl_indexdir_cleanup(ofs); in ovl_get_indexdir()
1521 if (err || !ofs->indexdir) in ovl_get_indexdir()
1529 static bool ovl_lower_uuid_ok(struct ovl_fs *ofs, const uuid_t *uuid) in ovl_lower_uuid_ok() argument
1533 if (!ofs->config.nfs_export && !ovl_upper_mnt(ofs)) in ovl_lower_uuid_ok()
1544 if (!ofs->config.index && !ofs->config.metacopy && !ofs->config.xino && in ovl_lower_uuid_ok()
1548 for (i = 0; i < ofs->numfs; i++) { in ovl_lower_uuid_ok()
1556 if (ofs->fs[i].is_lower && in ovl_lower_uuid_ok()
1557 uuid_equal(&ofs->fs[i].sb->s_uuid, uuid)) { in ovl_lower_uuid_ok()
1558 ofs->fs[i].bad_uuid = true; in ovl_lower_uuid_ok()
1566 static int ovl_get_fsid(struct ovl_fs *ofs, const struct path *path) in ovl_get_fsid() argument
1574 for (i = 0; i < ofs->numfs; i++) { in ovl_get_fsid()
1575 if (ofs->fs[i].sb == sb) in ovl_get_fsid()
1579 if (!ovl_lower_uuid_ok(ofs, &sb->s_uuid)) { in ovl_get_fsid()
1581 if (ofs->config.index || ofs->config.nfs_export) { in ovl_get_fsid()
1582 ofs->config.index = false; in ovl_get_fsid()
1583 ofs->config.nfs_export = false; in ovl_get_fsid()
1597 ofs->fs[ofs->numfs].sb = sb; in ovl_get_fsid()
1598 ofs->fs[ofs->numfs].pseudo_dev = dev; in ovl_get_fsid()
1599 ofs->fs[ofs->numfs].bad_uuid = bad_uuid; in ovl_get_fsid()
1601 return ofs->numfs++; in ovl_get_fsid()
1604 static int ovl_get_layers(struct super_block *sb, struct ovl_fs *ofs, in ovl_get_layers() argument
1612 ofs->fs = kcalloc(numlower + 1, sizeof(struct ovl_sb), GFP_KERNEL); in ovl_get_layers()
1613 if (ofs->fs == NULL) in ovl_get_layers()
1617 ofs->numfs++; in ovl_get_layers()
1625 err = get_anon_bdev(&ofs->fs[0].pseudo_dev); in ovl_get_layers()
1631 if (ovl_upper_mnt(ofs)) { in ovl_get_layers()
1632 ofs->fs[0].sb = ovl_upper_mnt(ofs)->mnt_sb; in ovl_get_layers()
1633 ofs->fs[0].is_lower = false; in ovl_get_layers()
1641 err = fsid = ovl_get_fsid(ofs, &stack[i]); in ovl_get_layers()
1657 err = ovl_report_in_use(ofs, "lowerdir"); in ovl_get_layers()
1678 layers[ofs->numlayer].trap = trap; in ovl_get_layers()
1679 layers[ofs->numlayer].mnt = mnt; in ovl_get_layers()
1680 layers[ofs->numlayer].idx = ofs->numlayer; in ovl_get_layers()
1681 layers[ofs->numlayer].fsid = fsid; in ovl_get_layers()
1682 layers[ofs->numlayer].fs = &ofs->fs[fsid]; in ovl_get_layers()
1683 ofs->numlayer++; in ovl_get_layers()
1684 ofs->fs[fsid].is_lower = true; in ovl_get_layers()
1696 if (ofs->numfs - !ovl_upper_mnt(ofs) == 1) { in ovl_get_layers()
1697 if (ofs->config.xino == OVL_XINO_ON) in ovl_get_layers()
1699 ofs->xino_mode = 0; in ovl_get_layers()
1700 } else if (ofs->config.xino == OVL_XINO_OFF) { in ovl_get_layers()
1701 ofs->xino_mode = -1; in ovl_get_layers()
1702 } else if (ofs->xino_mode < 0) { in ovl_get_layers()
1711 ofs->xino_mode = ilog2(ofs->numfs - 1) + 2; in ovl_get_layers()
1714 if (ofs->xino_mode > 0) { in ovl_get_layers()
1716 ofs->xino_mode); in ovl_get_layers()
1726 struct ovl_fs *ofs, struct ovl_layer *layers) in ovl_get_lowerstack() argument
1733 if (!ofs->config.upperdir && numlower == 1) { in ovl_get_lowerstack()
1744 err = ovl_lower_dir(lower, &stack[i], ofs, &sb->s_stack_depth); in ovl_get_lowerstack()
1758 err = ovl_get_layers(sb, ofs, stack, numlower, layers); in ovl_get_lowerstack()
1769 oe->lowerstack[i].layer = &ofs->layers[i+1]; in ovl_get_lowerstack()
1789 static int ovl_check_layer(struct super_block *sb, struct ovl_fs *ofs, in ovl_check_layer() argument
1807 err = ovl_report_in_use(ofs, name); in ovl_check_layer()
1823 struct ovl_fs *ofs) in ovl_check_overlapping_layers() argument
1827 if (ovl_upper_mnt(ofs)) { in ovl_check_overlapping_layers()
1828 err = ovl_check_layer(sb, ofs, ovl_upper_mnt(ofs)->mnt_root, in ovl_check_overlapping_layers()
1840 err = ovl_check_layer(sb, ofs, ofs->workbasedir, "workdir", in ovl_check_overlapping_layers()
1846 for (i = 1; i < ofs->numlayer; i++) { in ovl_check_overlapping_layers()
1847 err = ovl_check_layer(sb, ofs, in ovl_check_overlapping_layers()
1848 ofs->layers[i].mnt->mnt_root, in ovl_check_overlapping_layers()
1900 struct ovl_fs *ofs; in ovl_fill_super() local
1910 ofs = kzalloc(sizeof(struct ovl_fs), GFP_KERNEL); in ovl_fill_super()
1911 if (!ofs) in ovl_fill_super()
1914 ofs->creator_cred = cred = prepare_creds(); in ovl_fill_super()
1919 ofs->share_whiteout = true; in ovl_fill_super()
1921 ofs->config.index = ovl_index_def; in ovl_fill_super()
1922 ofs->config.nfs_export = ovl_nfs_export_def; in ovl_fill_super()
1923 ofs->config.xino = ovl_xino_def(); in ovl_fill_super()
1924 ofs->config.metacopy = ovl_metacopy_def; in ovl_fill_super()
1925 err = ovl_parse_opt((char *) data, &ofs->config); in ovl_fill_super()
1930 if (!ofs->config.lowerdir) { in ovl_fill_super()
1937 splitlower = kstrdup(ofs->config.lowerdir, GFP_KERNEL); in ovl_fill_super()
1952 ofs->layers = layers; in ovl_fill_super()
1954 ofs->numlayer = 1; in ovl_fill_super()
1958 atomic_long_set(&ofs->last_ino, 1); in ovl_fill_super()
1960 if (ofs->config.xino != OVL_XINO_OFF) { in ovl_fill_super()
1961 ofs->xino_mode = BITS_PER_LONG - 32; in ovl_fill_super()
1962 if (!ofs->xino_mode) { in ovl_fill_super()
1964 ofs->config.xino = OVL_XINO_OFF; in ovl_fill_super()
1971 if (ofs->config.upperdir) { in ovl_fill_super()
1974 if (!ofs->config.workdir) { in ovl_fill_super()
1979 err = ovl_get_upper(sb, ofs, &layers[0], &upperpath); in ovl_fill_super()
1983 upper_sb = ovl_upper_mnt(ofs)->mnt_sb; in ovl_fill_super()
1984 if (!ovl_should_sync(ofs)) { in ovl_fill_super()
1985 ofs->errseq = errseq_sample(&upper_sb->s_wb_err); in ovl_fill_super()
1986 if (errseq_check(&upper_sb->s_wb_err, ofs->errseq)) { in ovl_fill_super()
1993 err = ovl_get_workdir(sb, ofs, &upperpath); in ovl_fill_super()
1997 if (!ofs->workdir) in ovl_fill_super()
2003 oe = ovl_get_lowerstack(sb, splitlower, numlower, ofs, layers); in ovl_fill_super()
2009 if (!ovl_upper_mnt(ofs)) in ovl_fill_super()
2012 if (!ovl_force_readonly(ofs) && ofs->config.index) { in ovl_fill_super()
2013 err = ovl_get_indexdir(sb, ofs, oe, &upperpath); in ovl_fill_super()
2018 if (!ofs->indexdir) in ovl_fill_super()
2022 err = ovl_check_overlapping_layers(sb, ofs); in ovl_fill_super()
2027 if (!ofs->indexdir) { in ovl_fill_super()
2028 ofs->config.index = false; in ovl_fill_super()
2029 if (ovl_upper_mnt(ofs) && ofs->config.nfs_export) { in ovl_fill_super()
2031 ofs->config.nfs_export = false; in ovl_fill_super()
2035 if (ofs->config.metacopy && ofs->config.nfs_export) { in ovl_fill_super()
2037 ofs->config.nfs_export = false; in ovl_fill_super()
2040 if (ofs->config.nfs_export) in ovl_fill_super()
2048 sb->s_fs_info = ofs; in ovl_fill_super()
2069 ovl_free_fs(ofs); in ovl_fill_super()