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| author | Boaz Harrosh <bharrosh@panasas.com> | 2010-05-31 18:02:39 +0300 |
|---|---|---|
| committer | Boaz Harrosh <bharrosh@panasas.com> | 2010-08-04 13:17:56 +0300 |
| commit | b2848349296f3428850eb34c3a52d586f48d4b04 (patch) | |
| tree | 481c44078de9425495fbd7201d6d39f89e35d206 | |
| parent | 85dc7878c6c2277de2eda2c4d1b11ea5c5b1068a (diff) | |
| download | linux-b2848349296f3428850eb34c3a52d586f48d4b04.tar.bz2 | |
exofs: exofs_file_fsync and exofs_file_flush correctness
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@panasas.com>
| -rw-r--r-- | 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 fef6899be397..aa1fd1a372cf 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 = { |