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authorTino Reichardt <milky-kernel@mcmilk.de>2012-09-17 11:58:19 -0500
committerDave Kleikamp <dave.kleikamp@oracle.com>2012-09-17 11:58:19 -0500
commitb40c2e665cd552eae5fbdbb878bc29a34357668e (patch)
tree23714e5773a77abf1daf71ca7958dcd8dfa688ea /fs/jfs/jfs_dmap.h
parentfbcbe2b3c92ee1c930dcfcf8bb764074c100fd63 (diff)
fs/jfs: TRIM support for JFS Filesystem
This patch adds support for the two linux interfaces of the discard/TRIM command for SSD devices and sparse/thinly-provisioned LUNs. JFS will support batched discard via FITRIM ioctl and online discard with the discard mount option. Signed-off-by: Tino Reichardt <list-jfs@mcmilk.de> Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Diffstat (limited to 'fs/jfs/jfs_dmap.h')
-rw-r--r--fs/jfs/jfs_dmap.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/jfs/jfs_dmap.h b/fs/jfs/jfs_dmap.h
index 6dcb906c55d..562b9a7e431 100644
--- a/fs/jfs/jfs_dmap.h
+++ b/fs/jfs/jfs_dmap.h
@@ -311,4 +311,6 @@ extern int dbAllocBottomUp(struct inode *ip, s64 blkno, s64 nblocks);
extern int dbExtendFS(struct inode *ipbmap, s64 blkno, s64 nblocks);
extern void dbFinalizeBmap(struct inode *ipbmap);
extern s64 dbMapFileSizeToMapSize(struct inode *ipbmap);
+extern s64 dbDiscardAG(struct inode *ip, int agno, s64 minlen);
+
#endif /* _H_JFS_DMAP */