From b40c2e665cd552eae5fbdbb878bc29a34357668e Mon Sep 17 00:00:00 2001 From: Tino Reichardt Date: Mon, 17 Sep 2012 11:58:19 -0500 Subject: 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 Signed-off-by: Dave Kleikamp --- fs/jfs/jfs_dmap.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'fs/jfs/jfs_dmap.h') 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 */ -- cgit v1.2.3