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| author | Joe Thornber <ejt@redhat.com> | 2013-03-01 23:45:50 +0100 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2013-03-01 23:45:50 +0100 |
| commit | 4e7f1f9089660aec3b5ab2645ce62777c6f4c6a2 (patch) | |
| tree | 56f012273947dcd88e4a73944aae37d01f023b56 /drivers/md/persistent-data/dm-btree-spine.c | |
| parent | dm: add target num_write_bios fn (diff) | |
| download | linux-4e7f1f9089660aec3b5ab2645ce62777c6f4c6a2.tar.xz linux-4e7f1f9089660aec3b5ab2645ce62777c6f4c6a2.zip | |
dm persistent data: add btree_walk
Add dm_btree_walk to iterate through the contents of a btree.
This will be used by the dm cache target.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/persistent-data/dm-btree-spine.c')
| -rw-r--r-- | drivers/md/persistent-data/dm-btree-spine.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/md/persistent-data/dm-btree-spine.c b/drivers/md/persistent-data/dm-btree-spine.c index f199a0c4ed04..cf9fd676ae44 100644 --- a/drivers/md/persistent-data/dm-btree-spine.c +++ b/drivers/md/persistent-data/dm-btree-spine.c @@ -164,6 +164,13 @@ int ro_step(struct ro_spine *s, dm_block_t new_child) return r; } +void ro_pop(struct ro_spine *s) +{ + BUG_ON(!s->count); + --s->count; + unlock_block(s->info, s->nodes[s->count]); +} + struct btree_node *ro_node(struct ro_spine *s) { struct dm_block *block; |