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Commit 999d8168 authored by Bryn Reeves's avatar Bryn Reeves Committed by Linus Torvalds
Browse files

[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

drivers/md/dm-table.c

+5 −0
Original line number Diff line number Diff line
@@ -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);

include/linux/device-mapper.h

+2 −0
Original line number Diff line number Diff line
@@ -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;

include/linux/dm-ioctl.h

+1 −1
Original line number Diff line number Diff line
@@ -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)"