diff options
author | Jonathan Brassow <jbrassow@redhat.com> | 2009-01-06 03:05:19 +0000 |
---|---|---|
committer | Alasdair G Kergon <agk@redhat.com> | 2009-01-06 03:05:19 +0000 |
commit | a159c1ac5f33c6cf0f5aa3c9d1ccdc82c907ee46 (patch) | |
tree | 2cb6bfd3f376e2366f3e3820ebd07a0a86a01cfc /drivers/md/dm-snap-persistent.c | |
parent | 4db6bfe02bdc7dc5048f46dd682a94801d029adc (diff) | |
download | kernel_samsung_smdk4412-a159c1ac5f33c6cf0f5aa3c9d1ccdc82c907ee46.zip kernel_samsung_smdk4412-a159c1ac5f33c6cf0f5aa3c9d1ccdc82c907ee46.tar.gz kernel_samsung_smdk4412-a159c1ac5f33c6cf0f5aa3c9d1ccdc82c907ee46.tar.bz2 |
dm snapshot: extend exception store functions
Supply dm_add_exception as a callback to the read_metadata function.
Add a status function ready for a later patch and name the functions
consistently.
Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/dm-snap-persistent.c')
-rw-r--r-- | drivers/md/dm-snap-persistent.c | 42 |
1 files changed, 26 insertions, 16 deletions
diff --git a/drivers/md/dm-snap-persistent.c b/drivers/md/dm-snap-persistent.c index 57c946c..936b34e 100644 --- a/drivers/md/dm-snap-persistent.c +++ b/drivers/md/dm-snap-persistent.c @@ -395,7 +395,11 @@ static void write_exception(struct pstore *ps, * 'full' is filled in to indicate if the area has been * filled. */ -static int insert_exceptions(struct pstore *ps, int *full) +static int insert_exceptions(struct pstore *ps, + int (*callback)(void *callback_context, + chunk_t old, chunk_t new), + void *callback_context, + int *full) { int r; unsigned int i; @@ -428,7 +432,7 @@ static int insert_exceptions(struct pstore *ps, int *full) /* * Otherwise we add the exception to the snapshot. */ - r = dm_add_exception(ps->snap, de.old_chunk, de.new_chunk); + r = callback(callback_context, de.old_chunk, de.new_chunk); if (r) return r; } @@ -436,7 +440,10 @@ static int insert_exceptions(struct pstore *ps, int *full) return 0; } -static int read_exceptions(struct pstore *ps) +static int read_exceptions(struct pstore *ps, + int (*callback)(void *callback_context, chunk_t old, + chunk_t new), + void *callback_context) { int r, full = 1; @@ -449,7 +456,7 @@ static int read_exceptions(struct pstore *ps) if (r) return r; - r = insert_exceptions(ps, &full); + r = insert_exceptions(ps, callback, callback_context, &full); if (r) return r; } @@ -482,7 +489,10 @@ static void persistent_destroy(struct dm_exception_store *store) kfree(ps); } -static int persistent_read_metadata(struct dm_exception_store *store) +static int persistent_read_metadata(struct dm_exception_store *store, + int (*callback)(void *callback_context, + chunk_t old, chunk_t new), + void *callback_context) { int r, uninitialized_var(new_snapshot); struct pstore *ps = get_info(store); @@ -540,7 +550,7 @@ static int persistent_read_metadata(struct dm_exception_store *store) /* * Read the metadata. */ - r = read_exceptions(ps); + r = read_exceptions(ps, callback, callback_context); if (r) return r; } @@ -548,8 +558,8 @@ static int persistent_read_metadata(struct dm_exception_store *store) return 0; } -static int persistent_prepare(struct dm_exception_store *store, - struct dm_snap_exception *e) +static int persistent_prepare_exception(struct dm_exception_store *store, + struct dm_snap_exception *e) { struct pstore *ps = get_info(store); uint32_t stride; @@ -575,10 +585,10 @@ static int persistent_prepare(struct dm_exception_store *store, return 0; } -static void persistent_commit(struct dm_exception_store *store, - struct dm_snap_exception *e, - void (*callback) (void *, int success), - void *callback_context) +static void persistent_commit_exception(struct dm_exception_store *store, + struct dm_snap_exception *e, + void (*callback) (void *, int success), + void *callback_context) { unsigned int i; struct pstore *ps = get_info(store); @@ -637,7 +647,7 @@ static void persistent_commit(struct dm_exception_store *store, ps->callback_count = 0; } -static void persistent_drop(struct dm_exception_store *store) +static void persistent_drop_snapshot(struct dm_exception_store *store) { struct pstore *ps = get_info(store); @@ -675,9 +685,9 @@ int dm_create_persistent(struct dm_exception_store *store) store->destroy = persistent_destroy; store->read_metadata = persistent_read_metadata; - store->prepare_exception = persistent_prepare; - store->commit_exception = persistent_commit; - store->drop_snapshot = persistent_drop; + store->prepare_exception = persistent_prepare_exception; + store->commit_exception = persistent_commit_exception; + store->drop_snapshot = persistent_drop_snapshot; store->fraction_full = persistent_fraction_full; store->context = ps; |