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Merge branch 'foreign/qu/norecovery-v7' into for-chris-4.6

This commit is contained in:
David Sterba 2016-02-26 15:38:30 +01:00
parent 67d605fec1 fed8f166eb
commit 23c1a966f2
4 changed files with 67 additions and 18 deletions
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19
Documentation/filesystems/btrfs.txt
View File

@ -168,10 +168,23 @@ Options with (*) are default options and will not show in the mount options.
notreelog
Enable/disable the tree logging used for fsync and O_SYNC writes.
recovery
Enable autorecovery attempts if a bad tree root is found at mount time.
Currently this scans a list of several previous tree roots and tries to
nologreplay
Disable the log tree replay at mount time to prevent filesystem
from getting modified.
Must be used with 'ro' mount option.
A filesystem mounted with this option cannot transition to a
read-write mount via remount,rw - the filesystem must be unmounted
and mounted back again if read-write access is desired.
usebackuproot
Enable attempts to use backup tree roots if a bad tree root is found at
mount time.
Currently this scans a list of 4 previous tree roots and tries to
use the first readable.
And since the mount option doesn't affect any behavior after mount,
it won't be shown in mount info.
Prior to 4.6, this was done by 'recovery' option that has been
deprecated, but will work.
rescan_uuid_tree
Force check and rebuild procedure of the UUID tree. This should not

6
fs/btrfs/ctree.h
View File

@ -2274,7 +2274,7 @@ struct btrfs_ioctl_defrag_range_args {
#define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
#define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
#define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
#define BTRFS_MOUNT_RECOVERY (1 << 18)
#define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
#define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
#define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
#define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
@ -2283,6 +2283,7 @@ struct btrfs_ioctl_defrag_range_args {
#define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
#define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
#define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
#define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
#define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
#define BTRFS_DEFAULT_MAX_INLINE (8192)
@ -4187,7 +4188,8 @@ void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
/* super.c */
int btrfs_parse_options(struct btrfs_root *root, char *options);
int btrfs_parse_options(struct btrfs_root *root, char *options,
unsigned long new_flags);
int btrfs_sync_fs(struct super_block *sb, int wait);
#ifdef CONFIG_PRINTK

15
fs/btrfs/disk-io.c
View File

@ -2751,7 +2751,7 @@ int open_ctree(struct super_block *sb,
*/
fs_info->compress_type = BTRFS_COMPRESS_ZLIB;
ret = btrfs_parse_options(tree_root, options);
ret = btrfs_parse_options(tree_root, options, sb->s_flags);
if (ret) {
err = ret;
goto fail_alloc;
@ -3030,8 +3030,9 @@ retry_root_backup:
if (ret)
goto fail_trans_kthread;
/* do not make disk changes in broken FS */
if (btrfs_super_log_root(disk_super) != 0) {
/* do not make disk changes in broken FS or nologreplay is given */
if (btrfs_super_log_root(disk_super) != 0 &&
!btrfs_test_opt(tree_root, NOLOGREPLAY)) {
ret = btrfs_replay_log(fs_info, fs_devices);
if (ret) {
err = ret;
@ -3147,6 +3148,12 @@ retry_root_backup:
fs_info->open = 1;
/*
* backuproot only affect mount behavior, and if open_ctree succeeded,
* no need to keep the flag
*/
btrfs_clear_opt(fs_info->mount_opt, USEBACKUPROOT);
return 0;
fail_qgroup:
@ -3201,7 +3208,7 @@ fail:
return err;
recovery_tree_root:
if (!btrfs_test_opt(tree_root, RECOVERY))
if (!btrfs_test_opt(tree_root, USEBACKUPROOT))
goto fail_tree_roots;
free_root_pointers(fs_info, 0);

45
fs/btrfs/super.c
View File

@ -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;