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Commit d5e404c1 authored by Alasdair G Kergon's avatar Alasdair G Kergon Committed by Linus Torvalds
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[PATCH] device-mapper snapshots: Handle origin extension 



Handle writes to a snapshot-origin device that has been extended since the
snapshot was taken.

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 93c534ae

drivers/md/dm-snap.c

+4 −0
Original line number Diff line number Diff line
@@ -931,6 +931,10 @@ static int __origin_write(struct list_head *snapshots, struct bio *bio) 
		if (!snap->valid)

			continue;



		/* Nothing to do if writing beyond end of snapshot */

		if (bio->bi_sector >= dm_table_get_size(snap->table))

			continue;



		down_write(&snap->lock);



		/*

drivers/md/dm-table.c

+1 −0
Original line number Diff line number Diff line
@@ -943,6 +943,7 @@ EXPORT_SYMBOL(dm_vcalloc); 
EXPORT_SYMBOL(dm_get_device);

EXPORT_SYMBOL(dm_put_device);

EXPORT_SYMBOL(dm_table_event);

EXPORT_SYMBOL(dm_table_get_size);

EXPORT_SYMBOL(dm_table_get_mode);

EXPORT_SYMBOL(dm_table_put);

EXPORT_SYMBOL(dm_table_get);