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dm thin metadata: use struct dm_pool_metadata members in __open_or_format_metadata 

Clean up __open_or_format_metadata in dm-thin-metadata by using struct
dm_pool_metadata members to replace local variables.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
This commit is contained in:
Joe Thornber 2012-07-27 15:08:12 +01:00 коммит произвёл Alasdair G Kergon
Родитель 583ceee2ed
Коммит d6332814e3
1 изменённых файлов: 17 добавлений и 23 удалений
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40
drivers/md/dm-thin-metadata.c
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@ -486,31 +486,29 @@ bad_locked:
}
static int __open_or_format_metadata(struct dm_pool_metadata *pmd,
struct dm_block_manager *bm,
dm_block_t nr_blocks, int create)
{
int r;
struct dm_space_map *sm, *data_sm;
struct dm_transaction_manager *tm;
struct dm_block *sblock;
if (create) {
r = dm_tm_create_with_sm(bm, THIN_SUPERBLOCK_LOCATION, &tm, &sm);
r = dm_tm_create_with_sm(pmd->bm, THIN_SUPERBLOCK_LOCATION,
&pmd->tm, &pmd->metadata_sm);
if (r < 0) {
DMERR("tm_create_with_sm failed");
return r;
}
data_sm = dm_sm_disk_create(tm, nr_blocks);
if (IS_ERR(data_sm)) {
pmd->data_sm = dm_sm_disk_create(pmd->tm, nr_blocks);
if (IS_ERR(pmd->data_sm)) {
DMERR("sm_disk_create failed");
r = PTR_ERR(data_sm);
r = PTR_ERR(pmd->data_sm);
goto bad;
}
} else {
struct thin_disk_superblock *disk_super;
r = dm_bm_read_lock(bm, THIN_SUPERBLOCK_LOCATION,
r = dm_bm_read_lock(pmd->bm, THIN_SUPERBLOCK_LOCATION,
&sb_validator, &sblock);
if (r < 0) {
DMERR("couldn't read superblock");
@ -518,33 +516,29 @@ static int __open_or_format_metadata(struct dm_pool_metadata *pmd,
}
disk_super = dm_block_data(sblock);
r = dm_tm_open_with_sm(bm, THIN_SUPERBLOCK_LOCATION,
r = dm_tm_open_with_sm(pmd->bm, THIN_SUPERBLOCK_LOCATION,
disk_super->metadata_space_map_root,
sizeof(disk_super->metadata_space_map_root),
&tm, &sm);
&pmd->tm, &pmd->metadata_sm);
if (r < 0) {
DMERR("tm_open_with_sm failed");
dm_bm_unlock(sblock);
return r;
}
data_sm = dm_sm_disk_open(tm, disk_super->data_space_map_root,
sizeof(disk_super->data_space_map_root));
if (IS_ERR(data_sm)) {
pmd->data_sm = dm_sm_disk_open(pmd->tm, disk_super->data_space_map_root,
sizeof(disk_super->data_space_map_root));
if (IS_ERR(pmd->data_sm)) {
DMERR("sm_disk_open failed");
dm_bm_unlock(sblock);
r = PTR_ERR(data_sm);
r = PTR_ERR(pmd->data_sm);
goto bad;
}
dm_bm_unlock(sblock);
}
pmd->bm = bm;
pmd->metadata_sm = sm;
pmd->data_sm = data_sm;
pmd->tm = tm;
pmd->nb_tm = dm_tm_create_non_blocking_clone(tm);
pmd->nb_tm = dm_tm_create_non_blocking_clone(pmd->tm);
if (!pmd->nb_tm) {
DMERR("could not create clone tm");
r = -ENOMEM;
@ -578,10 +572,10 @@ static int __open_or_format_metadata(struct dm_pool_metadata *pmd,
return 0;
bad_data_sm:
dm_sm_destroy(data_sm);
dm_sm_destroy(pmd->data_sm);
bad:
dm_tm_destroy(tm);
dm_sm_destroy(sm);
dm_tm_destroy(pmd->tm);
dm_sm_destroy(pmd->metadata_sm);
return r;
}
@ -605,7 +599,7 @@ static int __create_persistent_data_objects(struct dm_pool_metadata *pmd,
return r;
}
r = __open_or_format_metadata(pmd, pmd->bm, nr_blocks, *create);
r = __open_or_format_metadata(pmd, nr_blocks, *create);
if (r)
dm_block_manager_destroy(pmd->bm);