Just use the generic function instead of duplicating it. We only need
to reshuffle the read-only check a bit (which is there to prevent
writing to a filesystem which has been remounted read-only after error
I assume).
Reviewed-by: Zheng Liu <wenqing.lz@xxxxxxxxxx>
Signed-off-by: Jan Kara <jack@xxxxxxx>
---
fs/ext4/fsync.c | 47 +++++++++++------------------------------------
1 file changed, 11 insertions(+), 36 deletions(-)
diff --git a/fs/ext4/fsync.c b/fs/ext4/fsync.c
index dcc881b..6019bd4 100644
--- a/fs/ext4/fsync.c
+++ b/fs/ext4/fsync.c
@@ -73,32 +73,6 @@ static int ext4_sync_parent(struct inode *inode)
return ret;
}
-/**
- * __sync_file - generic_file_fsync without the locking and filemap_write
- * @inode: inode to sync
- * @datasync: only sync essential metadata if true
- *
- * This is just generic_file_fsync without the locking. This is needed for
- * nojournal mode to make sure this inodes data/metadata makes it to disk
- * properly. The i_mutex should be held already.
- */
-static int __sync_inode(struct inode *inode, int datasync)
-{
- int err;
- int ret;
-
- ret = sync_mapping_buffers(inode->i_mapping);
- if (!(inode->i_state & I_DIRTY))
- return ret;
- if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
- return ret;
-
- err = sync_inode_metadata(inode, 1);
- if (ret == 0)
- ret = err;
- return ret;
-}
-
/*
* akpm: A new design for ext4_sync_file().
*
@@ -116,7 +90,7 @@ int ext4_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
struct inode *inode = file->f_mapping->host;
struct ext4_inode_info *ei = EXT4_I(inode);
journal_t *journal = EXT4_SB(inode->i_sb)->s_journal;
- int ret, err;
+ int ret = 0, err;
tid_t commit_tid;
bool needs_barrier = false;
@@ -124,21 +98,21 @@ int ext4_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
trace_ext4_sync_file_enter(file, datasync);
- ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
- if (ret)
- return ret;
- mutex_lock(&inode->i_mutex);
-
if (inode->i_sb->s_flags & MS_RDONLY)
- goto out;
+ goto out_trace;
if (!journal) {
- ret = __sync_inode(inode, datasync);
+ ret = generic_file_fsync(file, start, end, datasync);
if (!ret && !hlist_empty(&inode->i_dentry))
ret = ext4_sync_parent(inode);
- goto out;
+ goto out_trace;
}
+ ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
+ if (ret)
+ return ret;
+ mutex_lock(&inode->i_mutex);
+
/*
* data=writeback,ordered:
* The caller's filemap_fdatawrite()/wait will sync the data.
@@ -168,8 +142,9 @@ int ext4_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
if (!ret)
ret = err;
}
- out:
+out:
mutex_unlock(&inode->i_mutex);
+out_trace:
trace_ext4_sync_file_exit(inode, ret);
return ret;
}
--
1.8.1.4
--
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