Lines Matching refs:fc
690 bool mount_capable(struct fs_context *fc) in mount_capable() argument
692 if (!(fc->fs_type->fs_flags & FS_USERNS_MOUNT)) in mount_capable()
695 return ns_capable(fc->user_ns, CAP_SYS_ADMIN); in mount_capable()
730 struct super_block *sget_fc(struct fs_context *fc, in sget_fc() argument
736 struct user_namespace *user_ns = fc->global ? &init_user_ns : fc->user_ns; in sget_fc()
745 if (user_ns != &init_user_ns && !(fc->fs_type->fs_flags & FS_USERNS_MOUNT)) { in sget_fc()
746 errorfc(fc, "VFS: Mounting from non-initial user namespace is not allowed"); in sget_fc()
753 hlist_for_each_entry(old, &fc->fs_type->fs_supers, s_instances) { in sget_fc()
754 if (test(old, fc)) in sget_fc()
760 s = alloc_super(fc->fs_type, fc->sb_flags, user_ns); in sget_fc()
766 s->s_fs_info = fc->s_fs_info; in sget_fc()
767 err = set(s, fc); in sget_fc()
774 fc->s_fs_info = NULL; in sget_fc()
775 s->s_type = fc->fs_type; in sget_fc()
776 s->s_iflags |= fc->s_iflags; in sget_fc()
791 if (user_ns != old->s_user_ns || fc->exclusive) { in sget_fc()
794 if (fc->exclusive) in sget_fc()
795 warnfc(fc, "reusing existing filesystem not allowed"); in sget_fc()
797 warnfc(fc, "reusing existing filesystem in another namespace not allowed"); in sget_fc()
1022 int reconfigure_super(struct fs_context *fc) in reconfigure_super() argument
1024 struct super_block *sb = fc->root->d_sb; in reconfigure_super()
1028 bool force = fc->sb_flags & SB_FORCE; in reconfigure_super()
1030 if (fc->sb_flags_mask & ~MS_RMT_MASK) in reconfigure_super()
1035 retval = security_sb_remount(sb, fc->security); in reconfigure_super()
1039 if (fc->sb_flags_mask & SB_RDONLY) { in reconfigure_super()
1041 if (!(fc->sb_flags & SB_RDONLY) && sb->s_bdev && in reconfigure_super()
1045 remount_rw = !(fc->sb_flags & SB_RDONLY) && sb_rdonly(sb); in reconfigure_super()
1046 remount_ro = (fc->sb_flags & SB_RDONLY) && !sb_rdonly(sb); in reconfigure_super()
1082 if (fc->ops->reconfigure) { in reconfigure_super()
1083 retval = fc->ops->reconfigure(fc); in reconfigure_super()
1093 WRITE_ONCE(sb->s_flags, ((sb->s_flags & ~fc->sb_flags_mask) | in reconfigure_super()
1094 (fc->sb_flags & fc->sb_flags_mask))); in reconfigure_super()
1119 struct fs_context *fc; in do_emergency_remount_callback() local
1121 fc = fs_context_for_reconfigure(sb->s_root, in do_emergency_remount_callback()
1123 if (!IS_ERR(fc)) { in do_emergency_remount_callback()
1124 if (parse_monolithic_mount_data(fc, NULL) == 0) in do_emergency_remount_callback()
1125 (void)reconfigure_super(fc); in do_emergency_remount_callback()
1126 put_fs_context(fc); in do_emergency_remount_callback()
1251 int set_anon_super_fc(struct super_block *sb, struct fs_context *fc) in set_anon_super_fc() argument
1257 static int test_keyed_super(struct super_block *sb, struct fs_context *fc) in test_keyed_super() argument
1259 return sb->s_fs_info == fc->s_fs_info; in test_keyed_super()
1262 static int test_single_super(struct super_block *s, struct fs_context *fc) in test_single_super() argument
1267 static int vfs_get_super(struct fs_context *fc, in vfs_get_super() argument
1270 struct fs_context *fc)) in vfs_get_super()
1275 sb = sget_fc(fc, test, set_anon_super_fc); in vfs_get_super()
1280 err = fill_super(sb, fc); in vfs_get_super()
1287 fc->root = dget(sb->s_root); in vfs_get_super()
1295 int get_tree_nodev(struct fs_context *fc, in get_tree_nodev() argument
1297 struct fs_context *fc)) in get_tree_nodev()
1299 return vfs_get_super(fc, NULL, fill_super); in get_tree_nodev()
1303 int get_tree_single(struct fs_context *fc, in get_tree_single() argument
1305 struct fs_context *fc)) in get_tree_single()
1307 return vfs_get_super(fc, test_single_super, fill_super); in get_tree_single()
1311 int get_tree_keyed(struct fs_context *fc, in get_tree_keyed() argument
1313 struct fs_context *fc), in get_tree_keyed() argument
1316 fc->s_fs_info = key; in get_tree_keyed()
1317 return vfs_get_super(fc, test_keyed_super, fill_super); in get_tree_keyed()
1327 static int super_s_dev_set(struct super_block *s, struct fs_context *fc) in super_s_dev_set() argument
1329 return set_bdev_super(s, fc->sget_key); in super_s_dev_set()
1332 static int super_s_dev_test(struct super_block *s, struct fs_context *fc) in super_s_dev_test() argument
1335 s->s_dev == *(dev_t *)fc->sget_key; in super_s_dev_test()
1358 struct super_block *sget_dev(struct fs_context *fc, dev_t dev) in sget_dev() argument
1360 fc->sget_key = &dev; in sget_dev()
1361 return sget_fc(fc, super_s_dev_test, super_s_dev_set); in sget_dev()
1548 struct fs_context *fc) in setup_bdev_super() argument
1556 if (fc) in setup_bdev_super()
1557 errorf(fc, "%s: Can't open blockdev", fc->source); in setup_bdev_super()
1577 if (fc) in setup_bdev_super()
1578 warnf(fc, "%pg: Can't mount, blockdev is frozen", bdev); in setup_bdev_super()
1604 int get_tree_bdev_flags(struct fs_context *fc, in get_tree_bdev_flags() argument
1606 struct fs_context *fc), unsigned int flags) in get_tree_bdev_flags() argument
1612 if (!fc->source) in get_tree_bdev_flags()
1613 return invalf(fc, "No source specified"); in get_tree_bdev_flags()
1615 error = lookup_bdev(fc->source, &dev); in get_tree_bdev_flags()
1618 errorf(fc, "%s: Can't lookup blockdev", fc->source); in get_tree_bdev_flags()
1621 fc->sb_flags |= SB_NOSEC; in get_tree_bdev_flags()
1622 s = sget_dev(fc, dev); in get_tree_bdev_flags()
1628 if ((fc->sb_flags ^ s->s_flags) & SB_RDONLY) { in get_tree_bdev_flags()
1629 warnf(fc, "%pg: Can't mount, would change RO state", s->s_bdev); in get_tree_bdev_flags()
1634 error = setup_bdev_super(s, fc->sb_flags, fc); in get_tree_bdev_flags()
1636 error = fill_super(s, fc); in get_tree_bdev_flags()
1644 BUG_ON(fc->root); in get_tree_bdev_flags()
1645 fc->root = dget(s->s_root); in get_tree_bdev_flags()
1655 int get_tree_bdev(struct fs_context *fc, in get_tree_bdev() argument
1659 return get_tree_bdev_flags(fc, fill_super, 0); in get_tree_bdev()
1743 struct fs_context *fc; in reconfigure_single() local
1751 fc = fs_context_for_reconfigure(s->s_root, flags, MS_RMT_MASK); in reconfigure_single()
1752 if (IS_ERR(fc)) in reconfigure_single()
1753 return PTR_ERR(fc); in reconfigure_single()
1755 ret = parse_monolithic_mount_data(fc, data); in reconfigure_single()
1759 ret = reconfigure_super(fc); in reconfigure_single()
1761 put_fs_context(fc); in reconfigure_single()
1803 int vfs_get_tree(struct fs_context *fc) in vfs_get_tree() argument
1808 if (fc->root) in vfs_get_tree()
1814 error = fc->ops->get_tree(fc); in vfs_get_tree()
1818 if (!fc->root) { in vfs_get_tree()
1820 fc->fs_type->name, error); in vfs_get_tree()
1827 sb = fc->root->d_sb; in vfs_get_tree()
1839 error = security_sb_set_mnt_opts(sb, fc->security, 0, NULL); in vfs_get_tree()
1841 fc_drop_locked(fc); in vfs_get_tree()
1852 "negative value (%lld)\n", fc->fs_type->name, sb->s_maxbytes); in vfs_get_tree()