[dm-devel] [PATCH 7 of 33] DM Snapshot: rename exception functions
Jonathan Brassow
jbrassow at redhat.com
Mon Apr 6 21:33:37 UTC 2009
Patch name: dm-snap-rename-exception-functions.patch
Rename exception functions. Preparing to pull them out of
dm-snap.c for broader use.
Signed-off-by: Jonathan Brassow <jbrassow at redhat.com>
Index: linux-2.6/drivers/md/dm-snap.c
===================================================================
--- linux-2.6.orig/drivers/md/dm-snap.c
+++ linux-2.6/drivers/md/dm-snap.c
@@ -348,8 +348,8 @@ static void unregister_snapshot(struct d
* The lowest hash_shift bits of the chunk number are ignored, allowing
* some consecutive chunks to be grouped together.
*/
-static int init_exception_table(struct dm_exception_table *et, uint32_t size,
- unsigned hash_shift)
+static int dm_exception_table_init(struct dm_exception_table *et,
+ uint32_t size, unsigned hash_shift)
{
unsigned int i;
@@ -365,8 +365,8 @@ static int init_exception_table(struct d
return 0;
}
-static void exit_exception_table(struct dm_exception_table *et,
- struct kmem_cache *mem)
+static void dm_exception_table_exit(struct dm_exception_table *et,
+ struct kmem_cache *mem)
{
struct list_head *slot;
struct dm_exception *ex, *next;
@@ -388,7 +388,7 @@ static uint32_t exception_hash(struct dm
return (chunk >> et->hash_shift) & et->hash_mask;
}
-static void remove_exception(struct dm_exception *e)
+static void dm_remove_exception(struct dm_exception *e)
{
list_del(&e->hash_list);
}
@@ -397,8 +397,8 @@ static void remove_exception(struct dm_e
* Return the exception data for a sector, or NULL if not
* remapped.
*/
-static struct dm_exception *lookup_exception(struct dm_exception_table *et,
- chunk_t chunk)
+static struct dm_exception *dm_lookup_exception(struct dm_exception_table *et,
+ chunk_t chunk)
{
struct list_head *slot;
struct dm_exception *e;
@@ -412,7 +412,7 @@ static struct dm_exception *lookup_excep
return NULL;
}
-static struct dm_exception *alloc_exception(void)
+static struct dm_exception *alloc_completed_exception(void)
{
struct dm_exception *e;
@@ -423,7 +423,7 @@ static struct dm_exception *alloc_except
return e;
}
-static void free_exception(struct dm_exception *e)
+static void free_completed_exception(struct dm_exception *e)
{
kmem_cache_free(exception_cache, e);
}
@@ -448,8 +448,8 @@ static void free_pending_exception(struc
atomic_dec(&s->pending_exceptions_count);
}
-static void insert_exception(struct dm_exception_table *eh,
- struct dm_exception *new_e)
+static void dm_insert_exception(struct dm_exception_table *eh,
+ struct dm_exception *new_e)
{
struct list_head *l;
struct dm_exception *e = NULL;
@@ -468,7 +468,7 @@ static void insert_exception(struct dm_e
new_e->new_chunk == (dm_chunk_number(e->new_chunk) +
dm_consecutive_chunk_count(e) + 1)) {
dm_consecutive_chunk_count_inc(e);
- free_exception(new_e);
+ free_completed_exception(new_e);
return;
}
@@ -478,7 +478,7 @@ static void insert_exception(struct dm_e
dm_consecutive_chunk_count_inc(e);
e->old_chunk--;
e->new_chunk--;
- free_exception(new_e);
+ free_completed_exception(new_e);
return;
}
@@ -499,7 +499,7 @@ static int dm_add_exception(void *contex
struct dm_snapshot *s = context;
struct dm_exception *e;
- e = alloc_exception();
+ e = alloc_completed_exception();
if (!e)
return -ENOMEM;
@@ -508,7 +508,7 @@ static int dm_add_exception(void *contex
/* Consecutive_count is implicitly initialised to zero */
e->new_chunk = new;
- insert_exception(&s->complete, e);
+ dm_insert_exception(&s->complete, e);
return 0;
}
@@ -544,8 +544,8 @@ static int init_hash_tables(struct dm_sn
hash_size = min(hash_size, max_buckets);
hash_size = rounddown_pow_of_two(hash_size);
- if (init_exception_table(&s->complete, hash_size,
- DM_CHUNK_CONSECUTIVE_BITS))
+ if (dm_exception_table_init(&s->complete, hash_size,
+ DM_CHUNK_CONSECUTIVE_BITS))
return -ENOMEM;
/*
@@ -556,8 +556,8 @@ static int init_hash_tables(struct dm_sn
if (hash_size < 64)
hash_size = 64;
- if (init_exception_table(&s->pending, hash_size, 0)) {
- exit_exception_table(&s->complete, exception_cache);
+ if (dm_exception_table_init(&s->pending, hash_size, 0)) {
+ dm_exception_table_exit(&s->complete, exception_cache);
return -ENOMEM;
}
@@ -749,8 +749,8 @@ bad_pending_pool:
dm_kcopyd_client_destroy(s->kcopyd_client);
bad_kcopyd:
- exit_exception_table(&s->pending, pending_cache);
- exit_exception_table(&s->complete, exception_cache);
+ dm_exception_table_exit(&s->pending, pending_cache);
+ dm_exception_table_exit(&s->complete, exception_cache);
bad_hash_tables:
dm_put_device(ti, s->origin);
@@ -769,8 +769,8 @@ static void __free_exceptions(struct dm_
dm_kcopyd_client_destroy(s->kcopyd_client);
s->kcopyd_client = NULL;
- exit_exception_table(&s->pending, pending_cache);
- exit_exception_table(&s->complete, exception_cache);
+ dm_exception_table_exit(&s->pending, pending_cache);
+ dm_exception_table_exit(&s->complete, exception_cache);
}
static void snapshot_dtr(struct dm_target *ti)
@@ -923,7 +923,7 @@ static void pending_complete(struct dm_s
goto out;
}
- e = alloc_exception();
+ e = alloc_completed_exception();
if (!e) {
down_write(&s->lock);
__invalidate_snapshot(s, -ENOMEM);
@@ -934,7 +934,7 @@ static void pending_complete(struct dm_s
down_write(&s->lock);
if (!s->valid) {
- free_exception(e);
+ free_completed_exception(e);
error = 1;
goto out;
}
@@ -950,10 +950,10 @@ static void pending_complete(struct dm_s
* Add a proper exception, and remove the
* in-flight exception from the list.
*/
- insert_exception(&s->complete, e);
+ dm_insert_exception(&s->complete, e);
out:
- remove_exception(&pe->e);
+ dm_remove_exception(&pe->e);
snapshot_bios = bio_list_get(&pe->snapshot_bios);
origin_bios = put_pending_exception(pe);
@@ -1021,7 +1021,7 @@ static void start_copy(struct dm_snap_pe
static struct dm_snap_pending_exception *
__lookup_pending_exception(struct dm_snapshot *s, chunk_t chunk)
{
- struct dm_exception *e = lookup_exception(&s->pending, chunk);
+ struct dm_exception *e = dm_lookup_exception(&s->pending, chunk);
if (!e)
return NULL;
@@ -1062,7 +1062,7 @@ __find_pending_exception(struct dm_snaps
}
get_pending_exception(pe);
- insert_exception(&s->pending, &pe->e);
+ dm_insert_exception(&s->pending, &pe->e);
return pe;
}
@@ -1104,7 +1104,7 @@ static int snapshot_map(struct dm_target
}
/* If the block is already remapped - use that, else remap it */
- e = lookup_exception(&s->complete, chunk);
+ e = dm_lookup_exception(&s->complete, chunk);
if (e) {
remap_exception(s, e, bio, chunk);
goto out_unlock;
@@ -1128,7 +1128,7 @@ static int snapshot_map(struct dm_target
goto out_unlock;
}
- e = lookup_exception(&s->complete, chunk);
+ e = dm_lookup_exception(&s->complete, chunk);
if (e) {
free_pending_exception(pe);
remap_exception(s, e, bio, chunk);
@@ -1266,7 +1266,7 @@ static int __origin_write(struct list_he
* ref_count is initialised to 1 so pending_complete()
* won't destroy the primary_pe while we're inside this loop.
*/
- e = lookup_exception(&snap->complete, chunk);
+ e = dm_lookup_exception(&snap->complete, chunk);
if (e)
goto next_snapshot;
@@ -1281,7 +1281,7 @@ static int __origin_write(struct list_he
goto next_snapshot;
}
- e = lookup_exception(&snap->complete, chunk);
+ e = dm_lookup_exception(&snap->complete, chunk);
if (e) {
free_pending_exception(pe);
goto next_snapshot;
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