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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_filsys.h
parentfbcbe2b3c92ee1c930dcfcf8bb764074c100fd63 (diff)
downloadlwn-b40c2e665cd552eae5fbdbb878bc29a34357668e.tar.gz
lwn-b40c2e665cd552eae5fbdbb878bc29a34357668e.zip
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_filsys.h')
-rw-r--r--fs/jfs/jfs_filsys.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/jfs/jfs_filsys.h b/fs/jfs/jfs_filsys.h
index b3f5463fbe52..b67d64671bb4 100644
--- a/fs/jfs/jfs_filsys.h
+++ b/fs/jfs/jfs_filsys.h
@@ -45,6 +45,9 @@
/* mount time flag to disable journaling to disk */
#define JFS_NOINTEGRITY 0x00000040
+/* mount time flag to enable TRIM to ssd disks */
+#define JFS_DISCARD 0x00000080
+
/* commit option */
#define JFS_COMMIT 0x00000f00 /* commit option mask */
#define JFS_GROUPCOMMIT 0x00000100 /* group (of 1) commit */