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authorSteven Whitehouse <swhiteho@redhat.com>2011-11-21 14:01:25 +0400
committerSteven Whitehouse <swhiteho@redhat.com>2011-11-21 14:01:25 +0400
commit4442f2e03ed9646664c94e197e637b03324a6664 (patch)
tree93f6219e9ccdc509413a773b5e815a4bcc7e0626 /fs/gfs2
parentb9f417f311a7141d0ba67e5c8e535010d2712f2d (diff)
downloadlinux-4442f2e03ed9646664c94e197e637b03324a6664.tar.xz
GFS2: O_(D)SYNC support for fallocate
Add sync of metadata after fallocate for O_SYNC files to ensure that we meet expectations for everything being on disk in this case. Unfortunately, the offset and len parameters are modified during the course of the fallocate function, so I've had to add a couple of new variables to call generic_write_sync() at the end. I know that potentially this will sync data as well within the range, but I think that is a fairly harmless side-effect overall, since we would not normally expect there to be any dirty data within the range in question. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Benjamin Marzinski <bmarzins@redhat.com>
Diffstat (limited to 'fs/gfs2')
-rw-r--r--fs/gfs2/file.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index 6336bc6bf458..9b6c6ac351a8 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -752,6 +752,8 @@ static long gfs2_fallocate(struct file *file, int mode, loff_t offset,
loff_t bytes, max_bytes;
struct gfs2_alloc *al;
int error;
+ const loff_t pos = offset;
+ const loff_t count = len;
loff_t bsize_mask = ~((loff_t)sdp->sd_sb.sb_bsize - 1);
loff_t next = (offset + len - 1) >> sdp->sd_sb.sb_bsize_shift;
loff_t max_chunk_size = UINT_MAX & bsize_mask;
@@ -834,6 +836,9 @@ retry:
gfs2_quota_unlock(ip);
gfs2_alloc_put(ip);
}
+
+ if (error == 0)
+ error = generic_write_sync(file, pos, count);
goto out_unlock;
out_trans_fail: