From 999d816851c3e080412a19558f111d01852d2f04 Mon Sep 17 00:00:00 2001
From: Bryn Reeves <breeves@redhat.com>
Date: Tue, 3 Oct 2006 01:15:43 -0700
Subject: [PATCH] [PATCH] dm table: add target flush
This patch adds support for a per-target dm_flush_fn method. This is needed
to allow dm-loop to invalidate page cache mappings in response to BLKFLSBUF
ioctl commands.
Signed-off-by: Bryn Reeves <breeves@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
drivers/md/dm-table.c | 5 +++++
include/linux/device-mapper.h | 2 ++
include/linux/dm-ioctl.h | 2 +-
3 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 4920998efeeb7..05befa91807a3 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -1001,6 +1001,11 @@ int dm_table_flush_all(struct dm_table *t)
{
struct list_head *d, *devices = dm_table_get_devices(t);
int ret = 0;
+ unsigned i;
+
+ for (i = 0; i < t->num_targets; i++)
+ if (t->targets[i].type->flush)
+ t->targets[i].type->flush(&t->targets[i]);
for (d = devices->next; d != devices; d = d->next) {
struct dm_dev *dd = list_entry(d, struct dm_dev, list);
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index 7a48d428d0a18..03ef41c1eaac3 100644
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -55,6 +55,7 @@ typedef int (*dm_endio_fn) (struct dm_target *ti,
struct bio *bio, int error,
union map_info *map_context);
+typedef void (*dm_flush_fn) (struct dm_target *ti);
typedef void (*dm_presuspend_fn) (struct dm_target *ti);
typedef void (*dm_postsuspend_fn) (struct dm_target *ti);
typedef int (*dm_preresume_fn) (struct dm_target *ti);
@@ -96,6 +97,7 @@ struct target_type {
dm_dtr_fn dtr;
dm_map_fn map;
dm_endio_fn end_io;
+ dm_flush_fn flush;
dm_presuspend_fn presuspend;
dm_postsuspend_fn postsuspend;
dm_preresume_fn preresume;
diff --git a/include/linux/dm-ioctl.h b/include/linux/dm-ioctl.h
index f28b5c87aa6bb..8853fc4d1c5eb 100644
--- a/include/linux/dm-ioctl.h
+++ b/include/linux/dm-ioctl.h
@@ -285,7 +285,7 @@ typedef char ioctl_struct[308];
#define DM_DEV_SET_GEOMETRY _IOWR(DM_IOCTL, DM_DEV_SET_GEOMETRY_CMD, struct dm_ioctl)
#define DM_VERSION_MAJOR 4
-#define DM_VERSION_MINOR 9
+#define DM_VERSION_MINOR 10
#define DM_VERSION_PATCHLEVEL 0
#define DM_VERSION_EXTRA "-ioctl (2006-09-14)"
--
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