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authorSteven Whitehouse <swhiteho@redhat.com>2011-08-05 10:12:47 +0100
committerSteven Whitehouse <swhiteho@redhat.com>2011-10-21 12:39:25 +0100
commitf18185291d605ea9e442e00e2cf6c917a84d9837 (patch)
tree27c3148fcce8de4d52dba528fd788e6c2059c9c8 /fs/gfs2
parent40ac218f52aa5cac7dc8082f28b61c8b2b29373c (diff)
GFS2: Fix bug trap and journaled data fsync
Journaled data requires that a complete flush of all dirty data for the file is done, in order that the ail flush which comes after will succeed. Also the recently enhanced bug trap can trigger falsely in case an ail flush from fsync races with a page read. This updates the bug trap such that it will ignore buffers which are locked and only trigger on dirty and/or pinned buffers when the ail flush is run from fsync. The original bug trap is retained when ail flush is run from ->go_sync() Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2')
-rw-r--r--fs/gfs2/file.c2
-rw-r--r--fs/gfs2/glops.c8
2 files changed, 6 insertions, 4 deletions
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index 92c3db424b40..9d12286d8111 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -590,6 +590,8 @@ static int gfs2_fsync(struct file *file, loff_t start, loff_t end,
mutex_unlock(&inode->i_mutex);
return ret;
}
+ if (gfs2_is_jdata(ip))
+ filemap_write_and_wait(mapping);
gfs2_ail_flush(ip->i_gl);
mutex_unlock(&inode->i_mutex);
}
diff --git a/fs/gfs2/glops.c b/fs/gfs2/glops.c
index 99df4832f94c..0cc3ff48ce20 100644
--- a/fs/gfs2/glops.c
+++ b/fs/gfs2/glops.c
@@ -46,7 +46,7 @@ static void gfs2_ail_error(struct gfs2_glock *gl, const struct buffer_head *bh)
* None of the buffers should be dirty, locked, or pinned.
*/
-static void __gfs2_ail_flush(struct gfs2_glock *gl)
+static void __gfs2_ail_flush(struct gfs2_glock *gl, unsigned long b_state)
{
struct gfs2_sbd *sdp = gl->gl_sbd;
struct list_head *head = &gl->gl_ail_list;
@@ -60,7 +60,7 @@ static void __gfs2_ail_flush(struct gfs2_glock *gl)
bd_ail_gl_list);
bh = bd->bd_bh;
blocknr = bh->b_blocknr;
- if (buffer_busy(bh))
+ if (bh->b_state & b_state)
gfs2_ail_error(gl, bh);
bh->b_private = NULL;
gfs2_remove_from_ail(bd); /* drops ref on bh */
@@ -99,7 +99,7 @@ static void gfs2_ail_empty_gl(struct gfs2_glock *gl)
BUG_ON(current->journal_info);
current->journal_info = &tr;
- __gfs2_ail_flush(gl);
+ __gfs2_ail_flush(gl, (1ul << BH_Dirty)|(1ul << BH_Pinned)|(1ul << BH_Lock));
gfs2_trans_end(sdp);
gfs2_log_flush(sdp, NULL);
@@ -117,7 +117,7 @@ void gfs2_ail_flush(struct gfs2_glock *gl)
ret = gfs2_trans_begin(sdp, 0, revokes);
if (ret)
return;
- __gfs2_ail_flush(gl);
+ __gfs2_ail_flush(gl, (1ul << BH_Dirty)|(1ul << BH_Pinned));
gfs2_trans_end(sdp);
gfs2_log_flush(sdp, NULL);
}