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authorLinus Torvalds <torvalds@linux-foundation.org>2010-10-22 17:07:18 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-10-22 17:07:18 -0700
commita2887097f25cd38cadfc11d10769e2b349fb5eca (patch)
treecd4adcb305365d6ba9acd2c02d4eb9d0125c6f8d /include/linux/fs.h
parent8abfc6e7a45eb74e51904bbae676fae008b11366 (diff)
parent005a1d15f5a6b2bb4ada80349513effbf22b4588 (diff)
downloadop-kernel-dev-a2887097f25cd38cadfc11d10769e2b349fb5eca.zip
op-kernel-dev-a2887097f25cd38cadfc11d10769e2b349fb5eca.tar.gz
Merge branch 'for-2.6.37/barrier' of git://git.kernel.dk/linux-2.6-block
* 'for-2.6.37/barrier' of git://git.kernel.dk/linux-2.6-block: (46 commits) xen-blkfront: disable barrier/flush write support Added blk-lib.c and blk-barrier.c was renamed to blk-flush.c block: remove BLKDEV_IFL_WAIT aic7xxx_old: removed unused 'req' variable block: remove the BH_Eopnotsupp flag block: remove the BLKDEV_IFL_BARRIER flag block: remove the WRITE_BARRIER flag swap: do not send discards as barriers fat: do not send discards as barriers ext4: do not send discards as barriers jbd2: replace barriers with explicit flush / FUA usage jbd2: Modify ASYNC_COMMIT code to not rely on queue draining on barrier jbd: replace barriers with explicit flush / FUA usage nilfs2: replace barriers with explicit flush / FUA usage reiserfs: replace barriers with explicit flush / FUA usage gfs2: replace barriers with explicit flush / FUA usage btrfs: replace barriers with explicit flush / FUA usage xfs: replace barriers with explicit flush / FUA usage block: pass gfp_mask and flags to sb_issue_discard dm: convey that all flushes are processed as empty ...
Diffstat (limited to 'include/linux/fs.h')
-rw-r--r--include/linux/fs.h28
1 files changed, 12 insertions, 16 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 0a81b87e..4f34ff6 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -135,12 +135,12 @@ struct inodes_stat_t {
* immediately after submission. The write equivalent
* of READ_SYNC.
* WRITE_ODIRECT_PLUG Special case write for O_DIRECT only.
- * WRITE_BARRIER Like WRITE_SYNC, but tells the block layer that all
- * previously submitted writes must be safely on storage
- * before this one is started. Also guarantees that when
- * this write is complete, it itself is also safely on
- * storage. Prevents reordering of writes on both sides
- * of this IO.
+ * WRITE_FLUSH Like WRITE_SYNC but with preceding cache flush.
+ * WRITE_FUA Like WRITE_SYNC but data is guaranteed to be on
+ * non-volatile media on completion.
+ * WRITE_FLUSH_FUA Combination of WRITE_FLUSH and FUA. The IO is preceded
+ * by a cache flush and data is guaranteed to be on
+ * non-volatile media on completion.
*
*/
#define RW_MASK REQ_WRITE
@@ -156,16 +156,12 @@ struct inodes_stat_t {
#define WRITE_SYNC (WRITE | REQ_SYNC | REQ_NOIDLE | REQ_UNPLUG)
#define WRITE_ODIRECT_PLUG (WRITE | REQ_SYNC)
#define WRITE_META (WRITE | REQ_META)
-#define WRITE_BARRIER (WRITE | REQ_SYNC | REQ_NOIDLE | REQ_UNPLUG | \
- REQ_HARDBARRIER)
-
-/*
- * These aren't really reads or writes, they pass down information about
- * parts of device that are now unused by the file system.
- */
-#define DISCARD_NOBARRIER (WRITE | REQ_DISCARD)
-#define DISCARD_BARRIER (WRITE | REQ_DISCARD | REQ_HARDBARRIER)
-#define DISCARD_SECURE (DISCARD_NOBARRIER | REQ_SECURE)
+#define WRITE_FLUSH (WRITE | REQ_SYNC | REQ_NOIDLE | REQ_UNPLUG | \
+ REQ_FLUSH)
+#define WRITE_FUA (WRITE | REQ_SYNC | REQ_NOIDLE | REQ_UNPLUG | \
+ REQ_FUA)
+#define WRITE_FLUSH_FUA (WRITE | REQ_SYNC | REQ_NOIDLE | REQ_UNPLUG | \
+ REQ_FLUSH | REQ_FUA)
#define SEL_IN 1
#define SEL_OUT 2
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