diff options
Diffstat (limited to 'fs/btrfs/super.c')
| -rw-r--r-- | fs/btrfs/super.c | 52 |
1 files changed, 41 insertions, 11 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index d41e09fe8e38..00b8f37cc306 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -303,7 +303,8 @@ enum { Opt_check_integrity_print_mask, Opt_fatal_errors, Opt_rescan_uuid_tree, Opt_commit_interval, Opt_barrier, Opt_nodefrag, Opt_nodiscard, Opt_noenospc_debug, Opt_noflushoncommit, Opt_acl, Opt_datacow, - Opt_datasum, Opt_treelog, Opt_noinode_cache, + Opt_datasum, Opt_treelog, Opt_noinode_cache, Opt_usebackuproot, + Opt_nologreplay, Opt_norecovery, #ifdef CONFIG_BTRFS_DEBUG Opt_fragment_data, Opt_fragment_metadata, Opt_fragment_all, #endif @@ -335,6 +336,8 @@ static const match_table_t tokens = { {Opt_noacl, "noacl"}, {Opt_notreelog, "notreelog"}, {Opt_treelog, "treelog"}, + {Opt_nologreplay, "nologreplay"}, + {Opt_norecovery, "norecovery"}, {Opt_flushoncommit, "flushoncommit"}, {Opt_noflushoncommit, "noflushoncommit"}, {Opt_ratio, "metadata_ratio=%d"}, @@ -352,7 +355,8 @@ static const match_table_t tokens = { {Opt_inode_cache, "inode_cache"}, {Opt_noinode_cache, "noinode_cache"}, {Opt_no_space_cache, "nospace_cache"}, - {Opt_recovery, "recovery"}, + {Opt_recovery, "recovery"}, /* deprecated */ + {Opt_usebackuproot, "usebackuproot"}, {Opt_skip_balance, "skip_balance"}, {Opt_check_integrity, "check_int"}, {Opt_check_integrity_including_extent_data, "check_int_data"}, @@ -373,7 +377,8 @@ static const match_table_t tokens = { * reading in a new superblock is parsed here. * XXX JDM: This needs to be cleaned up for remount. */ -int btrfs_parse_options(struct btrfs_root *root, char *options) +int btrfs_parse_options(struct btrfs_root *root, char *options, + unsigned long new_flags) { struct btrfs_fs_info *info = root->fs_info; substring_t args[MAX_OPT_ARGS]; @@ -393,8 +398,12 @@ int btrfs_parse_options(struct btrfs_root *root, char *options) else if (cache_gen) btrfs_set_opt(info->mount_opt, SPACE_CACHE); + /* + * Even the options are empty, we still need to do extra check + * against new flags + */ if (!options) - goto out; + goto check; /* * strsep changes the string, duplicate it because parse_options @@ -606,6 +615,11 @@ int btrfs_parse_options(struct btrfs_root *root, char *options) btrfs_clear_and_info(root, NOTREELOG, "enabling tree log"); break; + case Opt_norecovery: + case Opt_nologreplay: + btrfs_set_and_info(root, NOLOGREPLAY, + "disabling log replay at mount time"); + break; case Opt_flushoncommit: btrfs_set_and_info(root, FLUSHONCOMMIT, "turning on flush-on-commit"); @@ -696,8 +710,12 @@ int btrfs_parse_options(struct btrfs_root *root, char *options) "disabling auto defrag"); break; case Opt_recovery: - btrfs_info(root->fs_info, "enabling auto recovery"); - btrfs_set_opt(info->mount_opt, RECOVERY); + btrfs_warn(root->fs_info, + "'recovery' is deprecated, use 'usebackuproot' instead"); + case Opt_usebackuproot: + btrfs_info(root->fs_info, + "trying to use backup root at mount time"); + btrfs_set_opt(info->mount_opt, USEBACKUPROOT); break; case Opt_skip_balance: btrfs_set_opt(info->mount_opt, SKIP_BALANCE); @@ -792,6 +810,15 @@ int btrfs_parse_options(struct btrfs_root *root, char *options) break; } } +check: + /* + * Extra check for current option against current flag + */ + if (btrfs_test_opt(root, NOLOGREPLAY) && !(new_flags & MS_RDONLY)) { + btrfs_err(root->fs_info, + "nologreplay must be used with ro mount option"); + ret = -EINVAL; + } out: if (btrfs_fs_compat_ro(root->fs_info, FREE_SPACE_TREE) && !btrfs_test_opt(root, FREE_SPACE_TREE) && @@ -1202,6 +1229,8 @@ static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry) seq_puts(seq, ",ssd"); if (btrfs_test_opt(root, NOTREELOG)) seq_puts(seq, ",notreelog"); + if (btrfs_test_opt(root, NOLOGREPLAY)) + seq_puts(seq, ",nologreplay"); if (btrfs_test_opt(root, FLUSHONCOMMIT)) seq_puts(seq, ",flushoncommit"); if (btrfs_test_opt(root, DISCARD)) @@ -1228,8 +1257,6 @@ static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry) seq_puts(seq, ",inode_cache"); if (btrfs_test_opt(root, SKIP_BALANCE)) seq_puts(seq, ",skip_balance"); - if (btrfs_test_opt(root, RECOVERY)) - seq_puts(seq, ",recovery"); #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY if (btrfs_test_opt(root, CHECK_INTEGRITY_INCLUDING_EXTENT_DATA)) seq_puts(seq, ",check_int_data"); @@ -1685,7 +1712,7 @@ static int btrfs_remount(struct super_block *sb, int *flags, char *data) } } - ret = btrfs_parse_options(root, data); + ret = btrfs_parse_options(root, data, *flags); if (ret) { ret = -EINVAL; goto restore; @@ -2163,6 +2190,9 @@ static long btrfs_control_ioctl(struct file *file, unsigned int cmd, break; ret = !(fs_devices->num_devices == fs_devices->total_devices); break; + case BTRFS_IOC_GET_SUPPORTED_FEATURES: + ret = btrfs_ioctl_get_supported_features((void __user*)arg); + break; } kfree(vol); @@ -2261,7 +2291,7 @@ static void btrfs_interface_exit(void) misc_deregister(&btrfs_misc); } -static void btrfs_print_info(void) +static void btrfs_print_mod_info(void) { printk(KERN_INFO "Btrfs loaded" #ifdef CONFIG_BTRFS_DEBUG @@ -2363,7 +2393,7 @@ static int __init init_btrfs_fs(void) btrfs_init_lockdep(); - btrfs_print_info(); + btrfs_print_mod_info(); err = btrfs_run_sanity_tests(); if (err) |