summaryrefslogtreecommitdiffstats
path: root/drivers/md
diff options
context:
space:
mode:
authorKent Overstreet <kmo@daterainc.com>2013-07-24 23:06:40 -0700
committerKent Overstreet <kmo@daterainc.com>2013-11-10 21:56:35 -0800
commitd5cc66e95744065f96024add4bf7d7e019be54ac (patch)
tree6d134aaa14c6420f4193734dbe49a4ee32d2bb06 /drivers/md
parent3a3b6a4e075188342b58d4b6560f5540af64cac0 (diff)
downloadop-kernel-dev-d5cc66e95744065f96024add4bf7d7e019be54ac.zip
op-kernel-dev-d5cc66e95744065f96024add4bf7d7e019be54ac.tar.gz
bcache: bch_(btree|extent)_ptr_invalid()
Trying to treat btree pointers and leaf node pointers the same way was a mistake - going to start being more explicit about the type of key/pointer we're dealing with. This is the first part of that refactoring; this patch shouldn't change any actual behaviour. Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/bcache/bset.c49
-rw-r--r--drivers/md/bcache/bset.h4
-rw-r--r--drivers/md/bcache/btree.h13
-rw-r--r--drivers/md/bcache/super.c4
4 files changed, 49 insertions, 21 deletions
diff --git a/drivers/md/bcache/bset.c b/drivers/md/bcache/bset.c
index 6bffde4..b615348 100644
--- a/drivers/md/bcache/bset.c
+++ b/drivers/md/bcache/bset.c
@@ -73,19 +73,9 @@ void bch_keylist_pop_front(struct keylist *l)
/* Pointer validation */
-bool __bch_ptr_invalid(struct cache_set *c, int level, const struct bkey *k)
+static bool __ptr_invalid(struct cache_set *c, const struct bkey *k)
{
unsigned i;
- char buf[80];
-
- if (level && (!KEY_PTRS(k) || !KEY_SIZE(k) || KEY_DIRTY(k)))
- goto bad;
-
- if (!level && KEY_SIZE(k) > KEY_OFFSET(k))
- goto bad;
-
- if (!KEY_SIZE(k))
- return true;
for (i = 0; i < KEY_PTRS(k); i++)
if (ptr_available(c, k, i)) {
@@ -96,13 +86,46 @@ bool __bch_ptr_invalid(struct cache_set *c, int level, const struct bkey *k)
if (KEY_SIZE(k) + r > c->sb.bucket_size ||
bucket < ca->sb.first_bucket ||
bucket >= ca->sb.nbuckets)
- goto bad;
+ return true;
}
return false;
+}
+
+bool bch_btree_ptr_invalid(struct cache_set *c, const struct bkey *k)
+{
+ char buf[80];
+
+ if (!KEY_PTRS(k) || !KEY_SIZE(k) || KEY_DIRTY(k))
+ goto bad;
+
+ if (__ptr_invalid(c, k))
+ goto bad;
+
+ return false;
+bad:
+ bch_bkey_to_text(buf, sizeof(buf), k);
+ cache_bug(c, "spotted btree ptr %s: %s", buf, bch_ptr_status(c, k));
+ return true;
+}
+
+bool bch_extent_ptr_invalid(struct cache_set *c, const struct bkey *k)
+{
+ char buf[80];
+
+ if (!KEY_SIZE(k))
+ return true;
+
+ if (KEY_SIZE(k) > KEY_OFFSET(k))
+ goto bad;
+
+ if (__ptr_invalid(c, k))
+ goto bad;
+
+ return false;
bad:
bch_bkey_to_text(buf, sizeof(buf), k);
- cache_bug(c, "spotted bad key %s: %s", buf, bch_ptr_status(c, k));
+ cache_bug(c, "spotted extent %s: %s", buf, bch_ptr_status(c, k));
return true;
}
diff --git a/drivers/md/bcache/bset.h b/drivers/md/bcache/bset.h
index a043a92..e673860 100644
--- a/drivers/md/bcache/bset.h
+++ b/drivers/md/bcache/bset.h
@@ -277,7 +277,9 @@ static inline bool bch_cut_back(const struct bkey *where, struct bkey *k)
}
const char *bch_ptr_status(struct cache_set *, const struct bkey *);
-bool __bch_ptr_invalid(struct cache_set *, int level, const struct bkey *);
+bool bch_btree_ptr_invalid(struct cache_set *, const struct bkey *);
+bool bch_extent_ptr_invalid(struct cache_set *, const struct bkey *);
+
bool bch_ptr_bad(struct btree *, const struct bkey *);
static inline uint8_t gen_after(uint8_t a, uint8_t b)
diff --git a/drivers/md/bcache/btree.h b/drivers/md/bcache/btree.h
index d4b705e..e11bb85 100644
--- a/drivers/md/bcache/btree.h
+++ b/drivers/md/bcache/btree.h
@@ -204,11 +204,6 @@ static inline void set_gc_sectors(struct cache_set *c)
atomic_set(&c->sectors_to_gc, c->sb.bucket_size * c->nbuckets / 8);
}
-static inline bool bch_ptr_invalid(struct btree *b, const struct bkey *k)
-{
- return __bch_ptr_invalid(b->c, b->level, k);
-}
-
static inline struct bkey *bch_btree_iter_init(struct btree *b,
struct btree_iter *iter,
struct bkey *search)
@@ -216,6 +211,14 @@ static inline struct bkey *bch_btree_iter_init(struct btree *b,
return __bch_btree_iter_init(b, iter, search, b->sets);
}
+static inline bool bch_ptr_invalid(struct btree *b, const struct bkey *k)
+{
+ if (b->level)
+ return bch_btree_ptr_invalid(b->c, k);
+ else
+ return bch_extent_ptr_invalid(b->c, k);
+}
+
void bkey_put(struct cache_set *c, struct bkey *k);
/* Looping macros */
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index 05f8ccb..7ab926d 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -373,7 +373,7 @@ static char *uuid_read(struct cache_set *c, struct jset *j, struct closure *cl)
{
struct bkey *k = &j->uuid_bucket;
- if (__bch_ptr_invalid(c, 1, k))
+ if (bch_btree_ptr_invalid(c, k))
return "bad uuid pointer";
bkey_copy(&c->uuid_bucket, k);
@@ -1522,7 +1522,7 @@ static void run_cache_set(struct cache_set *c)
k = &j->btree_root;
err = "bad btree root";
- if (__bch_ptr_invalid(c, j->btree_level + 1, k))
+ if (bch_btree_ptr_invalid(c, k))
goto err;
err = "error reading btree root";
OpenPOWER on IntegriCloud