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dm snapshot: remove dm_snap header use

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Move useful functions out of dm-snap.h and stop using dm-snap.h.

Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
This commit is contained in:
Jonathan Brassow
2009-04-02 19:55:33 +01:00
committed by Alasdair G Kergon
parent 49beb2b87a
commit 71fab00a6b
5 changed files with 54 additions and 57 deletions
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18
drivers/md/dm-snap.c
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@@ -637,8 +637,6 @@ static int snapshot_ctr(struct dm_target *ti, unsigned int argc, char **argv)
goto bad4;
}
s->store->snap = s;
r = dm_kcopyd_client_create(SNAPSHOT_PAGES, &s->kcopyd_client);
if (r) {
ti->error = "Could not create kcopyd client";
@@ -962,11 +960,11 @@ static void start_copy(struct dm_snap_pending_exception *pe)
dev_size = get_dev_size(bdev);
src.bdev = bdev;
src.sector = chunk_to_sector(s, pe->e.old_chunk);
src.sector = chunk_to_sector(s->store, pe->e.old_chunk);
src.count = min(s->store->chunk_size, dev_size - src.sector);
dest.bdev = s->store->cow->bdev;
dest.sector = chunk_to_sector(s, pe->e.new_chunk);
dest.sector = chunk_to_sector(s->store, pe->e.new_chunk);
dest.count = src.count;
/* Hand over to kcopyd */
@@ -1027,9 +1025,11 @@ static void remap_exception(struct dm_snapshot *s, struct dm_snap_exception *e,
struct bio *bio, chunk_t chunk)
{
bio->bi_bdev = s->store->cow->bdev;
bio->bi_sector = chunk_to_sector(s, dm_chunk_number(e->new_chunk) +
(chunk - e->old_chunk)) +
(bio->bi_sector & s->store->chunk_mask);
bio->bi_sector = chunk_to_sector(s->store,
dm_chunk_number(e->new_chunk) +
(chunk - e->old_chunk)) +
(bio->bi_sector &
s->store->chunk_mask);
}
static int snapshot_map(struct dm_target *ti, struct bio *bio,
@@ -1041,7 +1041,7 @@ static int snapshot_map(struct dm_target *ti, struct bio *bio,
chunk_t chunk;
struct dm_snap_pending_exception *pe = NULL;
chunk = sector_to_chunk(s, bio->bi_sector);
chunk = sector_to_chunk(s->store, bio->bi_sector);
/* Full snapshots are not usable */
/* To get here the table must be live so s->active is always set. */
@@ -1210,7 +1210,7 @@ static int __origin_write(struct list_head *snapshots, struct bio *bio)
* Remember, different snapshots can have
* different chunk sizes.
*/
chunk = sector_to_chunk(snap, bio->bi_sector);
chunk = sector_to_chunk(snap->store, bio->bi_sector);
/*
* Check exception table to see if block