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| author | Brian Foster <bfoster@redhat.com> | 2012-11-06 09:50:38 -0500 |
|---|---|---|
| committer | Ben Myers <bpm@sgi.com> | 2012-11-08 14:20:44 -0600 |
| commit | 27b52867925e3aaed090063c1c58a7537e6373f3 (patch) | |
| tree | 901719517ac8dc751053f6bf9d86cbe2b73bf538 /fs/xfs/xfs_iops.c | |
| parent | 69a58a43f74eb2cb23d9bce2524dae33c289a40f (diff) | |
| download | linux-3.10-27b52867925e3aaed090063c1c58a7537e6373f3.tar.gz linux-3.10-27b52867925e3aaed090063c1c58a7537e6373f3.tar.bz2 linux-3.10-27b52867925e3aaed090063c1c58a7537e6373f3.zip | |
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.c | 4 |
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) { |