dm snapshot: rename dm_snap_exception to dm_exception

The exception structure is not necessarily just a snapshot
element (especially after we pull it out of dm-snap.c).

Renaming appropriately.

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

diff --git a/drivers/md/dm-exception-store.h b/drivers/md/dm-exception-store.h
index 5f9315b..9274969 100644 (file)
--- a/drivers/md/dm-exception-store.h
+++ b/drivers/md/dm-exception-store.h
@@ -26,7 +26,7 @@ typedef sector_t chunk_t;
  * of chunks that follow contiguously.  Remaining bits hold the number of the
  * chunk within the device.
  */
-struct dm_snap_exception {
+struct dm_exception {
        struct list_head hash_list;
 
        chunk_t old_chunk;
@@ -64,13 +64,13 @@ struct dm_exception_store_type {
         * Find somewhere to store the next exception.
         */
        int (*prepare_exception) (struct dm_exception_store *store,
-                                 struct dm_snap_exception *e);
+                                 struct dm_exception *e);
 
        /*
         * Update the metadata with this exception.
         */
        void (*commit_exception) (struct dm_exception_store *store,
-                                 struct dm_snap_exception *e,
+                                 struct dm_exception *e,
                                  void (*callback) (void *, int success),
                                  void *callback_context);
 
@@ -120,12 +120,12 @@ static inline chunk_t dm_chunk_number(chunk_t chunk)
        return chunk & (chunk_t)((1ULL << DM_CHUNK_NUMBER_BITS) - 1ULL);
 }
 
-static inline unsigned dm_consecutive_chunk_count(struct dm_snap_exception *e)
+static inline unsigned dm_consecutive_chunk_count(struct dm_exception *e)
 {
        return e->new_chunk >> DM_CHUNK_NUMBER_BITS;
 }
 
-static inline void dm_consecutive_chunk_count_inc(struct dm_snap_exception *e)
+static inline void dm_consecutive_chunk_count_inc(struct dm_exception *e)
 {
        e->new_chunk += (1ULL << DM_CHUNK_NUMBER_BITS);
 
@@ -140,12 +140,12 @@ static inline chunk_t dm_chunk_number(chunk_t chunk)
        return chunk;
 }
 
-static inline unsigned dm_consecutive_chunk_count(struct dm_snap_exception *e)
+static inline unsigned dm_consecutive_chunk_count(struct dm_exception *e)
 {
        return 0;
 }
 
-static inline void dm_consecutive_chunk_count_inc(struct dm_snap_exception *e)
+static inline void dm_consecutive_chunk_count_inc(struct dm_exception *e)
 {
 }
 

diff --git a/drivers/md/dm-snap-persistent.c b/drivers/md/dm-snap-persistent.c
index 7e855fb..24b8acd 100644 (file)
--- a/drivers/md/dm-snap-persistent.c
+++ b/drivers/md/dm-snap-persistent.c
@@ -580,7 +580,7 @@ static int persistent_read_metadata(struct dm_exception_store *store,
 }
 
 static int persistent_prepare_exception(struct dm_exception_store *store,
-                                       struct dm_snap_exception *e)
+                                       struct dm_exception *e)
 {
        struct pstore *ps = get_info(store);
        uint32_t stride;
@@ -607,7 +607,7 @@ static int persistent_prepare_exception(struct dm_exception_store *store,
 }
 
 static void persistent_commit_exception(struct dm_exception_store *store,
-                                       struct dm_snap_exception *e,
+                                       struct dm_exception *e,
                                        void (*callback) (void *, int success),
                                        void *callback_context)
 {

diff --git a/drivers/md/dm-snap-transient.c b/drivers/md/dm-snap-transient.c
index cde5aa5..267801b 100644 (file)
--- a/drivers/md/dm-snap-transient.c
+++ b/drivers/md/dm-snap-transient.c
@@ -36,7 +36,7 @@ static int transient_read_metadata(struct dm_exception_store *store,
 }
 
 static int transient_prepare_exception(struct dm_exception_store *store,
-                                      struct dm_snap_exception *e)
+                                      struct dm_exception *e)
 {
        struct transient_c *tc = store->context;
        sector_t size = get_dev_size(store->cow->bdev);
@@ -51,7 +51,7 @@ static int transient_prepare_exception(struct dm_exception_store *store,
 }
 
 static void transient_commit_exception(struct dm_exception_store *store,
-                                      struct dm_snap_exception *e,
+                                      struct dm_exception *e,
                                       void (*callback) (void *, int success),
                                       void *callback_context)
 {

diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c
index 9135498..a7d60f6 100644 (file)
--- a/drivers/md/dm-snap.c
+++ b/drivers/md/dm-snap.c
@@ -116,7 +116,7 @@ static int bdev_equal(struct block_device *lhs, struct block_device *rhs)
 }
 
 struct dm_snap_pending_exception {
-       struct dm_snap_exception e;
+       struct dm_exception e;
 
        /*
         * Origin buffers waiting for this to complete are held
@@ -371,7 +371,7 @@ static int init_exception_table(struct exception_table *et, uint32_t size,
 static void exit_exception_table(struct exception_table *et, struct kmem_cache *mem)
 {
        struct list_head *slot;
-       struct dm_snap_exception *ex, *next;
+       struct dm_exception *ex, *next;
        int i, size;
 
        size = et->hash_mask + 1;
@@ -390,7 +390,7 @@ static uint32_t exception_hash(struct exception_table *et, chunk_t chunk)
        return (chunk >> et->hash_shift) & et->hash_mask;
 }
 
-static void remove_exception(struct dm_snap_exception *e)
+static void remove_exception(struct dm_exception *e)
 {
        list_del(&e->hash_list);
 }
@@ -399,11 +399,11 @@ static void remove_exception(struct dm_snap_exception *e)
  * Return the exception data for a sector, or NULL if not
  * remapped.
  */
-static struct dm_snap_exception *lookup_exception(struct exception_table *et,
+static struct dm_exception *lookup_exception(struct exception_table *et,
                                                  chunk_t chunk)
 {
        struct list_head *slot;
-       struct dm_snap_exception *e;
+       struct dm_exception *e;
 
        slot = &et->table[exception_hash(et, chunk)];
        list_for_each_entry (e, slot, hash_list)
@@ -414,9 +414,9 @@ static struct dm_snap_exception *lookup_exception(struct exception_table *et,
        return NULL;
 }
 
-static struct dm_snap_exception *alloc_exception(void)
+static struct dm_exception *alloc_exception(void)
 {
-       struct dm_snap_exception *e;
+       struct dm_exception *e;
 
        e = kmem_cache_alloc(exception_cache, GFP_NOIO);
        if (!e)
@@ -425,7 +425,7 @@ static struct dm_snap_exception *alloc_exception(void)
        return e;
 }
 
-static void free_exception(struct dm_snap_exception *e)
+static void free_exception(struct dm_exception *e)
 {
        kmem_cache_free(exception_cache, e);
 }
@@ -451,10 +451,10 @@ static void free_pending_exception(struct dm_snap_pending_exception *pe)
 }
 
 static void insert_exception(struct exception_table *eh,
-                            struct dm_snap_exception *new_e)
+                            struct dm_exception *new_e)
 {
        struct list_head *l;
-       struct dm_snap_exception *e = NULL;
+       struct dm_exception *e = NULL;
 
        l = &eh->table[exception_hash(eh, new_e->old_chunk)];
 
@@ -499,7 +499,7 @@ out:
 static int dm_add_exception(void *context, chunk_t old, chunk_t new)
 {
        struct dm_snapshot *s = context;
-       struct dm_snap_exception *e;
+       struct dm_exception *e;
 
        e = alloc_exception();
        if (!e)
@@ -876,7 +876,7 @@ static struct bio *put_pending_exception(struct dm_snap_pending_exception *pe)
 
 static void pending_complete(struct dm_snap_pending_exception *pe, int success)
 {
-       struct dm_snap_exception *e;
+       struct dm_exception *e;
        struct dm_snapshot *s = pe->snap;
        struct bio *origin_bios = NULL;
        struct bio *snapshot_bios = NULL;
@@ -988,7 +988,7 @@ 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_snap_exception *e = lookup_exception(&s->pending, chunk);
+       struct dm_exception *e = lookup_exception(&s->pending, chunk);
 
        if (!e)
                return NULL;
@@ -1034,7 +1034,7 @@ __find_pending_exception(struct dm_snapshot *s,
        return pe;
 }
 
-static void remap_exception(struct dm_snapshot *s, struct dm_snap_exception *e,
+static void remap_exception(struct dm_snapshot *s, struct dm_exception *e,
                            struct bio *bio, chunk_t chunk)
 {
        bio->bi_bdev = s->store->cow->bdev;
@@ -1048,7 +1048,7 @@ static void remap_exception(struct dm_snapshot *s, struct dm_snap_exception *e,
 static int snapshot_map(struct dm_target *ti, struct bio *bio,
                        union map_info *map_context)
 {
-       struct dm_snap_exception *e;
+       struct dm_exception *e;
        struct dm_snapshot *s = ti->private;
        int r = DM_MAPIO_REMAPPED;
        chunk_t chunk;
@@ -1221,7 +1221,7 @@ static int __origin_write(struct list_head *snapshots, struct bio *bio)
 {
        int r = DM_MAPIO_REMAPPED, first = 0;
        struct dm_snapshot *snap;
-       struct dm_snap_exception *e;
+       struct dm_exception *e;
        struct dm_snap_pending_exception *pe, *next_pe, *primary_pe = NULL;
        chunk_t chunk;
        LIST_HEAD(pe_queue);
@@ -1500,7 +1500,7 @@ static int __init dm_snapshot_init(void)
                goto bad2;
        }
 
-       exception_cache = KMEM_CACHE(dm_snap_exception, 0);
+       exception_cache = KMEM_CACHE(dm_exception, 0);
        if (!exception_cache) {
                DMERR("Couldn't create exception cache.");
                r = -ENOMEM;