As per Christoph advise: no need to call filemap_write_and_wait().
In exofs all metadata is at the inode so just writing the inode is
all is needed. ->fsync implies this must be done synchronously.
But now exofs_file_fsync can not be used by exofs_file_flush.
vfs_fsync() should do that job correctly.
FIXME: remove the sb_sync and fix that sb_update better.
Signed-off-by: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
---
fs/exofs/file.c | 29 +++++++++++++++++------------
1 files changed, 17 insertions(+), 12 deletions(-)
diff --git a/fs/exofs/file.c b/fs/exofs/file.c
index f9bfe2b..68cb23e 100644
--- a/fs/exofs/file.c
+++ b/fs/exofs/file.c
@@ -30,9 +30,6 @@
* along with exofs; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
-
-#include <linux/buffer_head.h>
-
#include "exofs.h"
static int exofs_release_file(struct inode *inode, struct file *filp)
@@ -40,19 +37,27 @@ static int exofs_release_file(struct inode *inode, struct file *filp)
return 0;
}
+/* exofs_file_fsync - flush the inode to disk
+ *
+ * Note, in exofs all metadata is written as part of inode, regardless.
+ * The writeout is synchronous
+ */
static int exofs_file_fsync(struct file *filp, int datasync)
{
int ret;
- struct address_space *mapping = filp->f_mapping;
- struct inode *inode = mapping->host;
+ struct inode *inode = filp->f_mapping->host;
+ struct writeback_control wbc = {
+ .sync_mode = WB_SYNC_ALL,
+ .nr_to_write = 0, /* metadata-only; caller takes care of data */
+ };
struct super_block *sb;
- ret = filemap_write_and_wait(mapping);
- if (ret)
- return ret;
+ if (!(inode->i_state & I_DIRTY))
+ return 0;
+ if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
+ return 0;
- /* sync the inode attributes */
- ret = write_inode_now(inode, 1);
+ ret = sync_inode(inode, &wbc);
/* This is a good place to write the sb */
/* TODO: Sechedule an sb-sync on create */
@@ -65,9 +70,9 @@ static int exofs_file_fsync(struct file *filp, int datasync)
static int exofs_flush(struct file *file, fl_owner_t id)
{
- exofs_file_fsync(file, 1);
+ int ret = vfs_fsync(file, 0);
/* TODO: Flush the OSD target */
- return 0;
+ return ret;
}
const struct file_operations exofs_file_operations = {
--
1.6.6.1
--
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