dm snapshot: rename exception functions

Rename exception functions.  Preparing to pull them out of
dm-snap.c for broader use.

Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

1 files changed, 33 insertions, 33 deletions

diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c
index f40331cb1f6e..cb4c2c3a43f0 100644
--- a/drivers/md/dm-snap.c
+++ b/drivers/md/dm-snap.c
@@ -351,8 +351,8 @@ static void unregister_snapshot(struct dm_snapshot *s)
  * 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;
 
@@ -368,8 +368,8 @@ static int init_exception_table(struct dm_exception_table *et, uint32_t size,
         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;
@@ -391,7 +391,7 @@ static uint32_t exception_hash(struct dm_exception_table *et, chunk_t chunk)
         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);
 }
@@ -400,8 +400,8 @@ static void remove_exception(struct dm_exception *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;
@@ -415,7 +415,7 @@ static struct dm_exception *lookup_exception(struct dm_exception_table *et,
         return NULL;
 }
 
-static struct dm_exception *alloc_exception(void)
+static struct dm_exception *alloc_completed_exception(void)
 {
         struct dm_exception *e;
 
@@ -426,7 +426,7 @@ static struct dm_exception *alloc_exception(void)
         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);
 }
@@ -451,8 +451,8 @@ static void free_pending_exception(struct dm_snap_pending_exception *pe)
         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;
@@ -471,7 +471,7 @@ static void insert_exception(struct dm_exception_table *eh,
                     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;
                 }
 
@@ -481,7 +481,7 @@ static void insert_exception(struct dm_exception_table *eh,
                         dm_consecutive_chunk_count_inc(e);
                         e->old_chunk--;
                         e->new_chunk--;
-                        free_exception(new_e);
+                        free_completed_exception(new_e);
                         return;
                 }
 
@@ -502,7 +502,7 @@ static int dm_add_exception(void *context, chunk_t old, chunk_t new)
         struct dm_snapshot *s = context;
         struct dm_exception *e;
 
-        e = alloc_exception();
+        e = alloc_completed_exception();
         if (!e)
                 return -ENOMEM;
 
@@ -511,7 +511,7 @@ static int dm_add_exception(void *context, chunk_t old, chunk_t new)
         /* Consecutive_count is implicitly initialised to zero */
         e->new_chunk = new;
 
-        insert_exception(&s->complete, e);
+        dm_insert_exception(&s->complete, e);
 
         return 0;
 }
@@ -568,8 +568,8 @@ static int init_hash_tables(struct dm_snapshot *s)
         if (hash_size < 64)
                 hash_size = 64;
         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;
 
         /*
@@ -580,8 +580,8 @@ static int init_hash_tables(struct dm_snapshot *s)
         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;
         }
 
@@ -716,8 +716,8 @@ 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);
@@ -737,8 +737,8 @@ static void __free_exceptions(struct dm_snapshot *s)
         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)
@@ -891,7 +891,7 @@ static void pending_complete(struct dm_snap_pending_exception *pe, int success)
                 goto out;
         }
 
-        e = alloc_exception();
+        e = alloc_completed_exception();
         if (!e) {
                 down_write(&s->lock);
                 __invalidate_snapshot(s, -ENOMEM);
@@ -902,7 +902,7 @@ static void pending_complete(struct dm_snap_pending_exception *pe, int success)
 
         down_write(&s->lock);
         if (!s->valid) {
-                free_exception(e);
+                free_completed_exception(e);
                 error = 1;
                 goto out;
         }
@@ -918,10 +918,10 @@ static void pending_complete(struct dm_snap_pending_exception *pe, int success)
          * 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);
 
@@ -989,7 +989,7 @@ static void start_copy(struct dm_snap_pending_exception *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;
@@ -1030,7 +1030,7 @@ __find_pending_exception(struct dm_snapshot *s,
         }
 
         get_pending_exception(pe);
-        insert_exception(&s->pending, &pe->e);
+        dm_insert_exception(&s->pending, &pe->e);
 
         return pe;
 }
@@ -1077,7 +1077,7 @@ static int snapshot_map(struct dm_target *ti, struct bio *bio,
         }
 
         /* 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;
@@ -1101,7 +1101,7 @@ static int snapshot_map(struct dm_target *ti, struct bio *bio,
                                 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);
@@ -1254,7 +1254,7 @@ static int __origin_write(struct list_head *snapshots, struct bio *bio)
                  * 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;
 
@@ -1269,7 +1269,7 @@ static int __origin_write(struct list_head *snapshots, struct bio *bio)
                                 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;