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Commit 0cea9c78 authored by Jonathan Brassow's avatar Jonathan Brassow Committed by Alasdair G Kergon
Browse files

dm exception store: move dm_target pointer 



Move target pointer from snapshot to exception store.

Signed-off-by: default avatarJonathan Brassow <jbrassow@redhat.com>
Signed-off-by: default avatarAlasdair G Kergon <agk@redhat.com>
parent 493df71c

drivers/md/dm-exception-store.c

+2 −1
Original line number Diff line number Diff line
@@ -137,7 +137,7 @@ int dm_exception_store_type_unregister(struct dm_exception_store_type *type) 
}

EXPORT_SYMBOL(dm_exception_store_type_unregister);



int dm_exception_store_create(const char *type_name,

int dm_exception_store_create(const char *type_name, struct dm_target *ti,

			      struct dm_exception_store **store)

{

	int r = 0;
@@ -155,6 +155,7 @@ int dm_exception_store_create(const char *type_name, 
	}



	tmp_store->type = type;

	tmp_store->ti = ti;



	r = type->ctr(tmp_store, 0, NULL);

	if (r) {

drivers/md/dm-exception-store.h

+2 −1
Original line number Diff line number Diff line
@@ -95,6 +95,7 @@ struct dm_exception_store_type { 


struct dm_exception_store {

	struct dm_exception_store_type *type;

	struct dm_target *ti;



	struct dm_snapshot *snap;
@@ -147,7 +148,7 @@ static inline void dm_consecutive_chunk_count_inc(struct dm_snap_exception *e) 
int dm_exception_store_type_register(struct dm_exception_store_type *type);

int dm_exception_store_type_unregister(struct dm_exception_store_type *type);



int dm_exception_store_create(const char *type_name,

int dm_exception_store_create(const char *type_name, struct dm_target *ti,

			      struct dm_exception_store **store);

void dm_exception_store_destroy(struct dm_exception_store *store);

drivers/md/dm-snap.c

+3 −4
Original line number Diff line number Diff line
@@ -615,7 +615,6 @@ static int snapshot_ctr(struct dm_target *ti, unsigned int argc, char **argv) 
	atomic_set(&s->pending_exceptions_count, 0);

	init_rwsem(&s->lock);

	spin_lock_init(&s->pe_lock);

	s->ti = ti;



	/* Allocate hash table for COW data */

	if (init_hash_tables(s)) {
@@ -624,7 +623,7 @@ static int snapshot_ctr(struct dm_target *ti, unsigned int argc, char **argv) 
		goto bad3;

	}



	r = dm_exception_store_create(argv[2], &s->store);

	r = dm_exception_store_create(argv[2], ti, &s->store);

	if (r) {

		ti->error = "Couldn't create exception store";

		r = -EINVAL;
@@ -820,7 +819,7 @@ static void __invalidate_snapshot(struct dm_snapshot *s, int err) 


	s->valid = 0;



	dm_table_event(s->ti->table);

	dm_table_event(s->store->ti->table);

}



static void get_pending_exception(struct dm_snap_pending_exception *pe)
@@ -1196,7 +1195,7 @@ static int __origin_write(struct list_head *snapshots, struct bio *bio) 
			goto next_snapshot;



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

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

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

			goto next_snapshot;



		/*

drivers/md/dm-snap.h

+0 −1
Original line number Diff line number Diff line
@@ -25,7 +25,6 @@ struct exception_table { 


struct dm_snapshot {

	struct rw_semaphore lock;

	struct dm_target *ti;



	struct dm_dev *origin;

	struct dm_dev *cow;