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authorJinoh Kang <jinoh.kang.kr@gmail.com>2021-01-17 14:49:33 +0300
committerMike Snitzer <snitzer@redhat.com>2021-02-03 18:10:05 +0300
commit4c9e9883c20a3ad5384e689bdbb1d0677da4094c (patch)
tree89cadff58cb47d9b266138b57a17f867a23a5f8f /drivers/md
parent62f263178c16df300f92098c1a6edca0be7d204d (diff)
downloadlinux-4c9e9883c20a3ad5384e689bdbb1d0677da4094c.tar.xz
dm persistent data: fix return type of shadow_root()
shadow_root() truncates 64-bit dm_block_t into 32-bit int. This is not an issue in practice, since dm metadata as of v5.11 can only hold at most 4161600 blocks (255 index entries * ~16k metadata blocks). Nevertheless, this can confuse users debugging some specific data corruption scenarios. Also, DM_SM_METADATA_MAX_BLOCKS may be bumped in the future, or persistent-data may find its use in other places. Therefore, switch the return type of shadow_root from int to dm_block_t. Signed-off-by: Jinoh Kang <jinoh.kang.kr@gmail.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/persistent-data/dm-btree-internal.h2
-rw-r--r--drivers/md/persistent-data/dm-btree-spine.c2
2 files changed, 2 insertions, 2 deletions
diff --git a/drivers/md/persistent-data/dm-btree-internal.h b/drivers/md/persistent-data/dm-btree-internal.h
index 564896659dd4..fe073d92f01e 100644
--- a/drivers/md/persistent-data/dm-btree-internal.h
+++ b/drivers/md/persistent-data/dm-btree-internal.h
@@ -100,7 +100,7 @@ struct dm_block *shadow_parent(struct shadow_spine *s);
int shadow_has_parent(struct shadow_spine *s);
-int shadow_root(struct shadow_spine *s);
+dm_block_t shadow_root(struct shadow_spine *s);
/*
* Some inlines.
diff --git a/drivers/md/persistent-data/dm-btree-spine.c b/drivers/md/persistent-data/dm-btree-spine.c
index e03cb9e48773..8a2bfbfb218b 100644
--- a/drivers/md/persistent-data/dm-btree-spine.c
+++ b/drivers/md/persistent-data/dm-btree-spine.c
@@ -235,7 +235,7 @@ int shadow_has_parent(struct shadow_spine *s)
return s->count >= 2;
}
-int shadow_root(struct shadow_spine *s)
+dm_block_t shadow_root(struct shadow_spine *s)
{
return s->root;
}