Commit 999d8168 authored by Bryn Reeves's avatar Bryn Reeves Committed by Linus Torvalds
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[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: default avatarBryn Reeves <breeves@redhat.com>
Signed-off-by: default avatarAlasdair G Kergon <agk@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 3cb40214
...@@ -1001,6 +1001,11 @@ int dm_table_flush_all(struct dm_table *t) ...@@ -1001,6 +1001,11 @@ int dm_table_flush_all(struct dm_table *t)
{ {
struct list_head *d, *devices = dm_table_get_devices(t); struct list_head *d, *devices = dm_table_get_devices(t);
int ret = 0; 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) { for (d = devices->next; d != devices; d = d->next) {
struct dm_dev *dd = list_entry(d, struct dm_dev, list); struct dm_dev *dd = list_entry(d, struct dm_dev, list);
......
...@@ -55,6 +55,7 @@ typedef int (*dm_endio_fn) (struct dm_target *ti, ...@@ -55,6 +55,7 @@ typedef int (*dm_endio_fn) (struct dm_target *ti,
struct bio *bio, int error, struct bio *bio, int error,
union map_info *map_context); 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_presuspend_fn) (struct dm_target *ti);
typedef void (*dm_postsuspend_fn) (struct dm_target *ti); typedef void (*dm_postsuspend_fn) (struct dm_target *ti);
typedef int (*dm_preresume_fn) (struct dm_target *ti); typedef int (*dm_preresume_fn) (struct dm_target *ti);
...@@ -96,6 +97,7 @@ struct target_type { ...@@ -96,6 +97,7 @@ struct target_type {
dm_dtr_fn dtr; dm_dtr_fn dtr;
dm_map_fn map; dm_map_fn map;
dm_endio_fn end_io; dm_endio_fn end_io;
dm_flush_fn flush;
dm_presuspend_fn presuspend; dm_presuspend_fn presuspend;
dm_postsuspend_fn postsuspend; dm_postsuspend_fn postsuspend;
dm_preresume_fn preresume; dm_preresume_fn preresume;
......
...@@ -285,7 +285,7 @@ typedef char ioctl_struct[308]; ...@@ -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_DEV_SET_GEOMETRY _IOWR(DM_IOCTL, DM_DEV_SET_GEOMETRY_CMD, struct dm_ioctl)
#define DM_VERSION_MAJOR 4 #define DM_VERSION_MAJOR 4
#define DM_VERSION_MINOR 9 #define DM_VERSION_MINOR 10
#define DM_VERSION_PATCHLEVEL 0 #define DM_VERSION_PATCHLEVEL 0
#define DM_VERSION_EXTRA "-ioctl (2006-09-14)" #define DM_VERSION_EXTRA "-ioctl (2006-09-14)"
......
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