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btrfs: move fs_info::fs_frozen to the flags

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We can keep the state among the other fs_info flags, there's no reason
why fs_frozen would need to be separate.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2017-06-15 19:10:03 +02:00
parent 79b4f4c605
commit fac03c8dae
4 changed files with 8 additions and 7 deletions
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5
fs/btrfs/ctree.h
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@ -716,6 +716,8 @@ struct btrfs_delayed_root;
#define BTRFS_FS_LOG1_ERR 12
#define BTRFS_FS_LOG2_ERR 13
#define BTRFS_FS_QUOTA_OVERRIDE 14
/* Used to record internally whether fs has been frozen */
#define BTRFS_FS_FROZEN 15
/*
* Indicate that a whole-filesystem exclusive operation is running
@ -1107,9 +1109,6 @@ struct btrfs_fs_info {
*/
struct list_head pinned_chunks;
/* Used to record internally whether fs has been frozen */
int fs_frozen;
/* Cached block sizes */
u32 nodesize;
u32 sectorsize;

1
fs/btrfs/disk-io.c
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@ -2661,7 +2661,6 @@ int open_ctree(struct super_block *sb,
atomic_set(&fs_info->qgroup_op_seq, 0);
atomic_set(&fs_info->reada_works_cnt, 0);
atomic64_set(&fs_info->tree_mod_seq, 0);
fs_info->fs_frozen = 0;
fs_info->sb = sb;
fs_info->max_inline = BTRFS_DEFAULT_MAX_INLINE;
fs_info->metadata_ratio = 0;

6
fs/btrfs/super.c
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@ -2242,7 +2242,7 @@ static int btrfs_freeze(struct super_block *sb)
struct btrfs_fs_info *fs_info = btrfs_sb(sb);
struct btrfs_root *root = fs_info->tree_root;
fs_info->fs_frozen = 1;
set_bit(BTRFS_FS_FROZEN, &fs_info->flags);
/*
* We don't need a barrier here, we'll wait for any transaction that
* could be in progress on other threads (and do delayed iputs that
@ -2261,7 +2261,9 @@ static int btrfs_freeze(struct super_block *sb)
static int btrfs_unfreeze(struct super_block *sb)
{
btrfs_sb(sb)->fs_frozen = 0;
struct btrfs_fs_info *fs_info = btrfs_sb(sb);
clear_bit(BTRFS_FS_FROZEN, &fs_info->flags);
return 0;
}

3
fs/btrfs/transaction.c
View File

@ -2314,7 +2314,8 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans)
* it'll result in deadlock about SB_FREEZE_FS.
*/
if (current != fs_info->transaction_kthread &&
current != fs_info->cleaner_kthread && !fs_info->fs_frozen)
current != fs_info->cleaner_kthread &&
!test_bit(BTRFS_FS_FROZEN, &fs_info->flags))
btrfs_run_delayed_iputs(fs_info);
return ret;