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authorTino Reichardt <milky-kernel@mcmilk.de>2012-09-17 20:58:19 +0400
committerDave Kleikamp <dave.kleikamp@oracle.com>2012-09-17 20:58:19 +0400
commitb40c2e665cd552eae5fbdbb878bc29a34357668e (patch)
tree23714e5773a77abf1daf71ca7958dcd8dfa688ea /fs/jfs/jfs_discard.h
parentfbcbe2b3c92ee1c930dcfcf8bb764074c100fd63 (diff)
downloadlinux-b40c2e665cd552eae5fbdbb878bc29a34357668e.tar.xz
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_discard.h')
-rw-r--r--fs/jfs/jfs_discard.h26
1 files changed, 26 insertions, 0 deletions
diff --git a/fs/jfs/jfs_discard.h b/fs/jfs/jfs_discard.h
new file mode 100644
index 000000000000..40d1ee6081a0
--- /dev/null
+++ b/fs/jfs/jfs_discard.h
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) Tino Reichardt, 2012
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#ifndef _H_JFS_DISCARD
+#define _H_JFS_DISCARD
+
+struct fstrim_range;
+
+extern void jfs_issue_discard(struct inode *ip, u64 blkno, u64 nblocks);
+extern int jfs_ioc_trim(struct inode *ip, struct fstrim_range *range);
+
+#endif /* _H_JFS_DISCARD */