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authorJosef Bacik <josef@redhat.com>2012-05-29 16:57:49 -0400
committerJosef Bacik <josef@redhat.com>2012-05-30 10:23:42 -0400
commit22ee6985de7d3e81ec0cef9c6ba01b45ad1bafeb (patch)
tree96f9f1b4a4e0f0e77503fd63e6552a4a4b477e21 /fs/btrfs
parent018642a1f197887058e97291460b890d296e8953 (diff)
Btrfs: check to see if the inode is in the log before fsyncing
We have this check down in the actual logging code, but this is after we start a transaction and all that good stuff. So move the helper inode_in_log() out so we can call it in fsync() and avoid starting a transaction altogether and just exit if we've already fsync()'ed this file recently. You would notice this issue if you fsync()'ed a file over and over again until the transaction committed. Thanks, Signed-off-by: Josef Bacik <josef@redhat.com>
Diffstat (limited to 'fs/btrfs')
-rw-r--r--fs/btrfs/btrfs_inode.h13
-rw-r--r--fs/btrfs/file.c3
-rw-r--r--fs/btrfs/tree-log.c17
3 files changed, 16 insertions, 17 deletions
diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h
index ce2c9d60031..e616f8872e6 100644
--- a/fs/btrfs/btrfs_inode.h
+++ b/fs/btrfs/btrfs_inode.h
@@ -199,4 +199,17 @@ static inline bool btrfs_is_free_space_inode(struct btrfs_root *root,
return false;
}
+static inline int btrfs_inode_in_log(struct inode *inode, u64 generation)
+{
+ struct btrfs_root *root = BTRFS_I(inode)->root;
+ int ret = 0;
+
+ mutex_lock(&root->log_mutex);
+ if (BTRFS_I(inode)->logged_trans == generation &&
+ BTRFS_I(inode)->last_sub_trans <= root->last_log_commit)
+ ret = 1;
+ mutex_unlock(&root->log_mutex);
+ return ret;
+}
+
#endif
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 2e63cdc2b09..876cddd6b2f 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1552,7 +1552,8 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
* syncing
*/
smp_mb();
- if (BTRFS_I(inode)->last_trans <=
+ if (btrfs_inode_in_log(inode, root->fs_info->generation) ||
+ BTRFS_I(inode)->last_trans <=
root->fs_info->last_trans_committed) {
BTRFS_I(inode)->last_trans = 0;
mutex_unlock(&inode->i_mutex);
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 6f22a4fca8d..425014bdc6a 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -3038,21 +3038,6 @@ out:
return ret;
}
-static int inode_in_log(struct btrfs_trans_handle *trans,
- struct inode *inode)
-{
- struct btrfs_root *root = BTRFS_I(inode)->root;
- int ret = 0;
-
- mutex_lock(&root->log_mutex);
- if (BTRFS_I(inode)->logged_trans == trans->transid &&
- BTRFS_I(inode)->last_sub_trans <= root->last_log_commit)
- ret = 1;
- mutex_unlock(&root->log_mutex);
- return ret;
-}
-
-
/*
* helper function around btrfs_log_inode to make sure newly created
* parent directories also end up in the log. A minimal inode and backref
@@ -3093,7 +3078,7 @@ int btrfs_log_inode_parent(struct btrfs_trans_handle *trans,
if (ret)
goto end_no_trans;
- if (inode_in_log(trans, inode)) {
+ if (btrfs_inode_in_log(inode, trans->transid)) {
ret = BTRFS_NO_LOG_SYNC;
goto end_no_trans;
}