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authorBrian Foster <bfoster@redhat.com>2012-11-06 09:50:38 -0500
committerBen Myers <bpm@sgi.com>2012-11-08 14:20:44 -0600
commit27b52867925e3aaed090063c1c58a7537e6373f3 (patch)
tree901719517ac8dc751053f6bf9d86cbe2b73bf538 /fs/xfs/xfs_iops.c
parent69a58a43f74eb2cb23d9bce2524dae33c289a40f (diff)
xfs: add EOFBLOCKS inode tagging/untagging
Add the XFS_ICI_EOFBLOCKS_TAG inode tag to identify inodes with speculatively preallocated blocks beyond EOF. An inode is tagged when speculative preallocation occurs and untagged either via truncate down or when post-EOF blocks are freed via release or reclaim. The tag management is intentionally not aggressive to prefer simplicity over the complexity of handling all the corner cases under which post-EOF blocks could be freed (i.e., forward truncation, fallocate, write error conditions, etc.). This means that a tagged inode may or may not have post-EOF blocks after a period of time. The tag is eventually cleared when the inode is released or reclaimed. Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Mark Tinguely <tinguely@sgi.com> Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_iops.c')
-rw-r--r--fs/xfs/xfs_iops.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index 4e00cf091d2..81f5c495328 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -38,6 +38,7 @@
#include "xfs_vnodeops.h"
#include "xfs_inode_item.h"
#include "xfs_trace.h"
+#include "xfs_icache.h"
#include <linux/capability.h>
#include <linux/xattr.h>
@@ -854,6 +855,9 @@ xfs_setattr_size(
* and do not wait the usual (long) time for writeout.
*/
xfs_iflags_set(ip, XFS_ITRUNCATED);
+
+ /* A truncate down always removes post-EOF blocks. */
+ xfs_inode_clear_eofblocks_tag(ip);
}
if (mask & ATTR_CTIME) {