bcache: Rename/shuffle various code around
More work to disentangle bset.c from the rest of the code:
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
diff --git a/drivers/md/bcache/bcache.h b/drivers/md/bcache/bcache.h
index 7bd4c93..5c74d55 100644
--- a/drivers/md/bcache/bcache.h
+++ b/drivers/md/bcache/bcache.h
@@ -717,14 +717,6 @@
#define bucket_bytes(c) ((c)->sb.bucket_size << 9)
#define block_bytes(c) ((c)->sb.block_size << 9)
-#define __set_bytes(i, k) (sizeof(*(i)) + (k) * sizeof(uint64_t))
-#define set_bytes(i) __set_bytes(i, i->keys)
-
-#define __set_blocks(i, k, c) DIV_ROUND_UP(__set_bytes(i, k), block_bytes(c))
-#define set_blocks(i, c) __set_blocks(i, (i)->keys, c)
-
-#define btree_data_space(b) (PAGE_SIZE << (b)->page_order)
-
#define prios_per_bucket(c) \
((bucket_bytes(c) - sizeof(struct prio_set)) / \
sizeof(struct bucket_disk))
diff --git a/drivers/md/bcache/bset.c b/drivers/md/bcache/bset.c
index 9d9c2edd..e04e590 100644
--- a/drivers/md/bcache/bset.c
+++ b/drivers/md/bcache/bset.c
@@ -302,6 +302,115 @@
return true;
}
+/* Auxiliary search trees */
+
+/* 32 bits total: */
+#define BKEY_MID_BITS 3
+#define BKEY_EXPONENT_BITS 7
+#define BKEY_MANTISSA_BITS (32 - BKEY_MID_BITS - BKEY_EXPONENT_BITS)
+#define BKEY_MANTISSA_MASK ((1 << BKEY_MANTISSA_BITS) - 1)
+
+struct bkey_float {
+ unsigned exponent:BKEY_EXPONENT_BITS;
+ unsigned m:BKEY_MID_BITS;
+ unsigned mantissa:BKEY_MANTISSA_BITS;
+} __packed;
+
+/*
+ * BSET_CACHELINE was originally intended to match the hardware cacheline size -
+ * it used to be 64, but I realized the lookup code would touch slightly less
+ * memory if it was 128.
+ *
+ * It definites the number of bytes (in struct bset) per struct bkey_float in
+ * the auxiliar search tree - when we're done searching the bset_float tree we
+ * have this many bytes left that we do a linear search over.
+ *
+ * Since (after level 5) every level of the bset_tree is on a new cacheline,
+ * we're touching one fewer cacheline in the bset tree in exchange for one more
+ * cacheline in the linear search - but the linear search might stop before it
+ * gets to the second cacheline.
+ */
+
+#define BSET_CACHELINE 128
+
+/* Space required for the btree node keys */
+static inline size_t btree_keys_bytes(struct btree *b)
+{
+ return PAGE_SIZE << b->page_order;
+}
+
+static inline size_t btree_keys_cachelines(struct btree *b)
+{
+ return btree_keys_bytes(b) / BSET_CACHELINE;
+}
+
+/* Space required for the auxiliary search trees */
+static inline size_t bset_tree_bytes(struct btree *b)
+{
+ return btree_keys_cachelines(b) * sizeof(struct bkey_float);
+}
+
+/* Space required for the prev pointers */
+static inline size_t bset_prev_bytes(struct btree *b)
+{
+ return btree_keys_cachelines(b) * sizeof(uint8_t);
+}
+
+/* Memory allocation */
+
+void bch_btree_keys_free(struct btree *b)
+{
+ struct bset_tree *t = b->sets;
+
+ if (bset_prev_bytes(b) < PAGE_SIZE)
+ kfree(t->prev);
+ else
+ free_pages((unsigned long) t->prev,
+ get_order(bset_prev_bytes(b)));
+
+ if (bset_tree_bytes(b) < PAGE_SIZE)
+ kfree(t->tree);
+ else
+ free_pages((unsigned long) t->tree,
+ get_order(bset_tree_bytes(b)));
+
+ free_pages((unsigned long) t->data, b->page_order);
+
+ t->prev = NULL;
+ t->tree = NULL;
+ t->data = NULL;
+}
+
+int bch_btree_keys_alloc(struct btree *b, unsigned page_order, gfp_t gfp)
+{
+ struct bset_tree *t = b->sets;
+
+ BUG_ON(t->data);
+
+ b->page_order = page_order;
+
+ t->data = (void *) __get_free_pages(gfp, b->page_order);
+ if (!t->data)
+ goto err;
+
+ t->tree = bset_tree_bytes(b) < PAGE_SIZE
+ ? kmalloc(bset_tree_bytes(b), gfp)
+ : (void *) __get_free_pages(gfp, get_order(bset_tree_bytes(b)));
+ if (!t->tree)
+ goto err;
+
+ t->prev = bset_prev_bytes(b) < PAGE_SIZE
+ ? kmalloc(bset_prev_bytes(b), gfp)
+ : (void *) __get_free_pages(gfp, get_order(bset_prev_bytes(b)));
+ if (!t->prev)
+ goto err;
+
+ return 0;
+err:
+ bch_btree_keys_free(b);
+ return -ENOMEM;
+}
+
/* Binary tree stuff for auxiliary search trees */
static unsigned inorder_next(unsigned j, unsigned size)
@@ -538,21 +647,36 @@
t++->size = 0;
}
-static void bset_build_unwritten_tree(struct btree *b)
+static void bch_bset_build_unwritten_tree(struct btree *b)
{
- struct bset_tree *t = b->sets + b->nsets;
+ struct bset_tree *t = bset_tree_last(b);
bset_alloc_tree(b, t);
- if (t->tree != b->sets->tree + bset_tree_space(b)) {
+ if (t->tree != b->sets->tree + btree_keys_cachelines(b)) {
t->prev[0] = bkey_to_cacheline_offset(t->data->start);
t->size = 1;
}
}
+void bch_bset_init_next(struct btree *b, struct bset *i, uint64_t magic)
+{
+ if (i != b->sets->data) {
+ b->sets[++b->nsets].data = i;
+ i->seq = b->sets->data->seq;
+ } else
+ get_random_bytes(&i->seq, sizeof(uint64_t));
+
+ i->magic = magic;
+ i->version = 0;
+ i->keys = 0;
+
+ bch_bset_build_unwritten_tree(b);
+}
+
static void bset_build_written_tree(struct btree *b)
{
- struct bset_tree *t = b->sets + b->nsets;
+ struct bset_tree *t = bset_tree_last(b);
struct bkey *k = t->data->start;
unsigned j, cacheline = 1;
@@ -560,7 +684,7 @@
t->size = min_t(unsigned,
bkey_to_cacheline(t, bset_bkey_last(t->data)),
- b->sets->tree + bset_tree_space(b) - t->tree);
+ b->sets->tree + btree_keys_cachelines(b) - t->tree);
if (t->size < 2) {
t->size = 0;
@@ -599,7 +723,7 @@
struct bset_tree *t;
unsigned inorder, j = 1;
- for (t = b->sets; t <= &b->sets[b->nsets]; t++)
+ for (t = b->sets; t <= bset_tree_last(b); t++)
if (k < bset_bkey_last(t->data))
goto found_set;
@@ -639,9 +763,10 @@
} while (j < t->size);
}
-void bch_bset_fix_lookup_table(struct btree *b, struct bkey *k)
+static void bch_bset_fix_lookup_table(struct btree *b,
+ struct bset_tree *t,
+ struct bkey *k)
{
- struct bset_tree *t = &b->sets[b->nsets];
unsigned shift = bkey_u64s(k);
unsigned j = bkey_to_cacheline(t, k);
@@ -673,7 +798,7 @@
}
}
- if (t->size == b->sets->tree + bset_tree_space(b) - t->tree)
+ if (t->size == b->sets->tree + btree_keys_cachelines(b) - t->tree)
return;
/* Possibly add a new entry to the end of the lookup table */
@@ -687,21 +812,23 @@
}
}
-void bch_bset_init_next(struct btree *b)
+void bch_bset_insert(struct btree *b, struct bkey *where,
+ struct bkey *insert)
{
- struct bset *i = write_block(b);
+ struct bset_tree *t = bset_tree_last(b);
- if (i != b->sets[0].data) {
- b->sets[++b->nsets].data = i;
- i->seq = b->sets[0].data->seq;
- } else
- get_random_bytes(&i->seq, sizeof(uint64_t));
+ BUG_ON(t->data != write_block(b));
+ BUG_ON(bset_byte_offset(b, t->data) +
+ __set_bytes(t->data, t->data->keys + bkey_u64s(insert)) >
+ PAGE_SIZE << b->page_order);
- i->magic = bset_magic(&b->c->sb);
- i->version = 0;
- i->keys = 0;
+ memmove((uint64_t *) where + bkey_u64s(insert),
+ where,
+ (void *) bset_bkey_last(t->data) - (void *) where);
- bset_build_unwritten_tree(b);
+ t->data->keys += bkey_u64s(insert);
+ bkey_copy(where, insert);
+ bch_bset_fix_lookup_table(b, t, where);
}
struct bset_search_iter {
@@ -1154,9 +1281,8 @@
__bch_btree_iter_init(b, &iter, NULL, &b->sets[start]);
- BUG_ON(b->sets[b->nsets].data == write_block(b) &&
- (b->sets[b->nsets].size || b->nsets));
-
+ BUG_ON(!bset_written(b, bset_tree_last(b)) &&
+ (bset_tree_last(b)->size || b->nsets));
if (start) {
unsigned i;
diff --git a/drivers/md/bcache/bset.h b/drivers/md/bcache/bset.h
index 4f60c21..ab31f3f 100644
--- a/drivers/md/bcache/bset.h
+++ b/drivers/md/bcache/bset.h
@@ -144,12 +144,60 @@
* first key in that range of bytes again.
*/
-struct cache_set;
-
-/* Btree key comparison/iteration */
+struct btree;
+struct bkey_float;
#define MAX_BSETS 4U
+struct bset_tree {
+ /*
+ * We construct a binary tree in an array as if the array
+ * started at 1, so that things line up on the same cachelines
+ * better: see comments in bset.c at cacheline_to_bkey() for
+ * details
+ */
+
+ /* size of the binary tree and prev array */
+ unsigned size;
+
+ /* function of size - precalculated for to_inorder() */
+ unsigned extra;
+
+ /* copy of the last key in the set */
+ struct bkey end;
+ struct bkey_float *tree;
+
+ /*
+ * The nodes in the bset tree point to specific keys - this
+ * array holds the sizes of the previous key.
+ *
+ * Conceptually it's a member of struct bkey_float, but we want
+ * to keep bkey_float to 4 bytes and prev isn't used in the fast
+ * path.
+ */
+ uint8_t *prev;
+
+ /* The actual btree node, with pointers to each sorted set */
+ struct bset *data;
+};
+
+#define __set_bytes(i, k) (sizeof(*(i)) + (k) * sizeof(uint64_t))
+#define set_bytes(i) __set_bytes(i, i->keys)
+
+#define __set_blocks(i, k, block_bytes) \
+ DIV_ROUND_UP(__set_bytes(i, k), block_bytes)
+#define set_blocks(i, block_bytes) \
+ __set_blocks(i, (i)->keys, block_bytes)
+
+void bch_btree_keys_free(struct btree *);
+int bch_btree_keys_alloc(struct btree *, unsigned, gfp_t);
+
+void bch_bset_fix_invalidated_key(struct btree *, struct bkey *);
+void bch_bset_init_next(struct btree *, struct bset *, uint64_t);
+void bch_bset_insert(struct btree *, struct bkey *, struct bkey *);
+
+/* Btree key iteration */
+
struct btree_iter {
size_t size, used;
#ifdef CONFIG_BCACHE_DEBUG
@@ -160,37 +208,27 @@
} data[MAX_BSETS];
};
-struct bset_tree {
- /*
- * We construct a binary tree in an array as if the array
- * started at 1, so that things line up on the same cachelines
- * better: see comments in bset.c at cacheline_to_bkey() for
- * details
- */
+typedef bool (*ptr_filter_fn)(struct btree *, const struct bkey *);
- /* size of the binary tree and prev array */
- unsigned size;
+struct bkey *bch_btree_iter_next(struct btree_iter *);
+struct bkey *bch_btree_iter_next_filter(struct btree_iter *,
+ struct btree *, ptr_filter_fn);
- /* function of size - precalculated for to_inorder() */
- unsigned extra;
+void bch_btree_iter_push(struct btree_iter *, struct bkey *, struct bkey *);
+struct bkey *bch_btree_iter_init(struct btree *, struct btree_iter *,
+ struct bkey *);
- /* copy of the last key in the set */
- struct bkey end;
- struct bkey_float *tree;
+struct bkey *__bch_bset_search(struct btree *, struct bset_tree *,
+ const struct bkey *);
- /*
- * The nodes in the bset tree point to specific keys - this
- * array holds the sizes of the previous key.
- *
- * Conceptually it's a member of struct bkey_float, but we want
- * to keep bkey_float to 4 bytes and prev isn't used in the fast
- * path.
- */
- uint8_t *prev;
-
- /* The actual btree node, with pointers to each sorted set */
- struct bset *data;
-};
+/*
+ * Returns the first key that is strictly greater than search
+ */
+static inline struct bkey *bch_bset_search(struct btree *b, struct bset_tree *t,
+ const struct bkey *search)
+{
+ return search ? __bch_bset_search(b, t, search) : t->data->start;
+}
/* Sorting */
@@ -219,6 +257,60 @@
bch_btree_sort_partial(b, 0, state);
}
+/* Bkey utility code */
+
+#define bset_bkey_last(i) bkey_idx((struct bkey *) (i)->d, (i)->keys)
+
+static inline struct bkey *bset_bkey_idx(struct bset *i, unsigned idx)
+{
+ return bkey_idx(i->start, idx);
+}
+
+static inline void bkey_init(struct bkey *k)
+{
+ *k = ZERO_KEY;
+}
+
+static __always_inline int64_t bkey_cmp(const struct bkey *l,
+ const struct bkey *r)
+{
+ return unlikely(KEY_INODE(l) != KEY_INODE(r))
+ ? (int64_t) KEY_INODE(l) - (int64_t) KEY_INODE(r)
+ : (int64_t) KEY_OFFSET(l) - (int64_t) KEY_OFFSET(r);
+}
+
+void bch_bkey_copy_single_ptr(struct bkey *, const struct bkey *,
+ unsigned);
+bool __bch_cut_front(const struct bkey *, struct bkey *);
+bool __bch_cut_back(const struct bkey *, struct bkey *);
+
+static inline bool bch_cut_front(const struct bkey *where, struct bkey *k)
+{
+ BUG_ON(bkey_cmp(where, k) > 0);
+ return __bch_cut_front(where, k);
+}
+
+static inline bool bch_cut_back(const struct bkey *where, struct bkey *k)
+{
+ BUG_ON(bkey_cmp(where, &START_KEY(k)) < 0);
+ return __bch_cut_back(where, k);
+}
+
+#define PRECEDING_KEY(_k) \
+({ \
+ struct bkey *_ret = NULL; \
+ \
+ if (KEY_INODE(_k) || KEY_OFFSET(_k)) { \
+ _ret = &KEY(KEY_INODE(_k), KEY_OFFSET(_k), 0); \
+ \
+ if (!_ret->low) \
+ _ret->high--; \
+ _ret->low--; \
+ } \
+ \
+ _ret; \
+})
+
/* Keylists */
struct keylist {
@@ -282,126 +374,15 @@
void bch_keylist_pop_front(struct keylist *);
int __bch_keylist_realloc(struct keylist *, unsigned);
-/* Bkey utility code */
-
-#define bset_bkey_last(i) bkey_idx((struct bkey *) (i)->d, (i)->keys)
-
-static inline struct bkey *bset_bkey_idx(struct bset *i, unsigned idx)
-{
- return bkey_idx(i->start, idx);
-}
-
-static inline void bkey_init(struct bkey *k)
-{
- *k = ZERO_KEY;
-}
-
-static __always_inline int64_t bkey_cmp(const struct bkey *l,
- const struct bkey *r)
-{
- return unlikely(KEY_INODE(l) != KEY_INODE(r))
- ? (int64_t) KEY_INODE(l) - (int64_t) KEY_INODE(r)
- : (int64_t) KEY_OFFSET(l) - (int64_t) KEY_OFFSET(r);
-}
-
-void bch_bkey_copy_single_ptr(struct bkey *, const struct bkey *,
- unsigned);
-bool __bch_cut_front(const struct bkey *, struct bkey *);
-bool __bch_cut_back(const struct bkey *, struct bkey *);
-
-static inline bool bch_cut_front(const struct bkey *where, struct bkey *k)
-{
- BUG_ON(bkey_cmp(where, k) > 0);
- return __bch_cut_front(where, k);
-}
-
-static inline bool bch_cut_back(const struct bkey *where, struct bkey *k)
-{
- BUG_ON(bkey_cmp(where, &START_KEY(k)) < 0);
- return __bch_cut_back(where, k);
-}
-
+struct cache_set;
const char *bch_ptr_status(struct cache_set *, 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_btree_ptr_bad(struct btree *, const struct bkey *);
+bool bch_extent_ptr_bad(struct btree *, const struct bkey *);
bool bch_ptr_bad(struct btree *, const struct bkey *);
-typedef bool (*ptr_filter_fn)(struct btree *, const struct bkey *);
-
-struct bkey *bch_btree_iter_next(struct btree_iter *);
-struct bkey *bch_btree_iter_next_filter(struct btree_iter *,
- struct btree *, ptr_filter_fn);
-
-void bch_btree_iter_push(struct btree_iter *, struct bkey *, struct bkey *);
-struct bkey *bch_btree_iter_init(struct btree *, struct btree_iter *,
- struct bkey *);
-
-/* 32 bits total: */
-#define BKEY_MID_BITS 3
-#define BKEY_EXPONENT_BITS 7
-#define BKEY_MANTISSA_BITS 22
-#define BKEY_MANTISSA_MASK ((1 << BKEY_MANTISSA_BITS) - 1)
-
-struct bkey_float {
- unsigned exponent:BKEY_EXPONENT_BITS;
- unsigned m:BKEY_MID_BITS;
- unsigned mantissa:BKEY_MANTISSA_BITS;
-} __packed;
-
-/*
- * BSET_CACHELINE was originally intended to match the hardware cacheline size -
- * it used to be 64, but I realized the lookup code would touch slightly less
- * memory if it was 128.
- *
- * It definites the number of bytes (in struct bset) per struct bkey_float in
- * the auxiliar search tree - when we're done searching the bset_float tree we
- * have this many bytes left that we do a linear search over.
- *
- * Since (after level 5) every level of the bset_tree is on a new cacheline,
- * we're touching one fewer cacheline in the bset tree in exchange for one more
- * cacheline in the linear search - but the linear search might stop before it
- * gets to the second cacheline.
- */
-
-#define BSET_CACHELINE 128
-#define bset_tree_space(b) (btree_data_space(b) / BSET_CACHELINE)
-
-#define bset_tree_bytes(b) (bset_tree_space(b) * sizeof(struct bkey_float))
-#define bset_prev_bytes(b) (bset_tree_space(b) * sizeof(uint8_t))
-
-void bch_bset_init_next(struct btree *);
-
-void bch_bset_fix_invalidated_key(struct btree *, struct bkey *);
-void bch_bset_fix_lookup_table(struct btree *, struct bkey *);
-
-struct bkey *__bch_bset_search(struct btree *, struct bset_tree *,
- const struct bkey *);
-
-/*
- * Returns the first key that is strictly greater than search
- */
-static inline struct bkey *bch_bset_search(struct btree *b, struct bset_tree *t,
- const struct bkey *search)
-{
- return search ? __bch_bset_search(b, t, search) : t->data->start;
-}
-
-#define PRECEDING_KEY(_k) \
-({ \
- struct bkey *_ret = NULL; \
- \
- if (KEY_INODE(_k) || KEY_OFFSET(_k)) { \
- _ret = &KEY(KEY_INODE(_k), KEY_OFFSET(_k), 0); \
- \
- if (!_ret->low) \
- _ret->high--; \
- _ret->low--; \
- } \
- \
- _ret; \
-})
-
bool bch_bkey_try_merge(struct btree *, struct bkey *, struct bkey *);
int bch_bset_print_stats(struct cache_set *, char *);
diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c
index 78ba0b6..89252e7 100644
--- a/drivers/md/bcache/btree.c
+++ b/drivers/md/bcache/btree.c
@@ -110,7 +110,7 @@
{
struct bset *i = write_block(b);
return b->written >= btree_blocks(b) ||
- (b->written + __set_blocks(i, i->keys + 15, b->c)
+ (b->written + __set_blocks(i, i->keys + 15, block_bytes(b->c))
> btree_blocks(b));
}
@@ -206,7 +206,7 @@
void bch_btree_node_read_done(struct btree *b)
{
const char *err = "bad btree header";
- struct bset *i = b->sets[0].data;
+ struct bset *i = btree_bset_first(b);
struct btree_iter *iter;
iter = mempool_alloc(b->c->fill_iter, GFP_NOWAIT);
@@ -228,7 +228,8 @@
goto err;
err = "bad btree header";
- if (b->written + set_blocks(i, b->c) > btree_blocks(b))
+ if (b->written + set_blocks(i, block_bytes(b->c)) >
+ btree_blocks(b))
goto err;
err = "bad magic";
@@ -253,7 +254,7 @@
bch_btree_iter_push(iter, i->start, bset_bkey_last(i));
- b->written += set_blocks(i, b->c);
+ b->written += set_blocks(i, block_bytes(b->c));
}
err = "corrupted btree";
@@ -272,7 +273,7 @@
goto err;
if (b->written < btree_blocks(b))
- bch_bset_init_next(b);
+ bch_bset_init_next(b, write_block(b), bset_magic(&b->c->sb));
out:
mempool_free(iter, b->c->fill_iter);
return;
@@ -393,7 +394,7 @@
static void do_btree_node_write(struct btree *b)
{
struct closure *cl = &b->io;
- struct bset *i = b->sets[b->nsets].data;
+ struct bset *i = btree_bset_last(b);
BKEY_PADDED(key) k;
i->version = BCACHE_BSET_VERSION;
@@ -405,7 +406,7 @@
b->bio->bi_end_io = btree_node_write_endio;
b->bio->bi_private = cl;
b->bio->bi_rw = REQ_META|WRITE_SYNC|REQ_FUA;
- b->bio->bi_iter.bi_size = set_blocks(i, b->c) * block_bytes(b->c);
+ b->bio->bi_iter.bi_size = roundup(set_bytes(i), block_bytes(b->c));
bch_bio_map(b->bio, i);
/*
@@ -424,7 +425,8 @@
*/
bkey_copy(&k.key, &b->key);
- SET_PTR_OFFSET(&k.key, 0, PTR_OFFSET(&k.key, 0) + bset_offset(b, i));
+ SET_PTR_OFFSET(&k.key, 0, PTR_OFFSET(&k.key, 0) +
+ bset_sector_offset(b, i));
if (!bio_alloc_pages(b->bio, GFP_NOIO)) {
int j;
@@ -451,14 +453,14 @@
void bch_btree_node_write(struct btree *b, struct closure *parent)
{
- struct bset *i = b->sets[b->nsets].data;
+ struct bset *i = btree_bset_last(b);
trace_bcache_btree_write(b);
BUG_ON(current->bio_list);
BUG_ON(b->written >= btree_blocks(b));
BUG_ON(b->written && !i->keys);
- BUG_ON(b->sets->data->seq != i->seq);
+ BUG_ON(btree_bset_first(b)->seq != i->seq);
bch_check_keys(b, "writing");
cancel_delayed_work(&b->work);
@@ -472,8 +474,8 @@
do_btree_node_write(b);
- b->written += set_blocks(i, b->c);
- atomic_long_add(set_blocks(i, b->c) * b->c->sb.block_size,
+ b->written += set_blocks(i, block_bytes(b->c));
+ atomic_long_add(set_blocks(i, block_bytes(b->c)) * b->c->sb.block_size,
&PTR_CACHE(b->c, &b->key, 0)->btree_sectors_written);
/* If not a leaf node, always sort */
@@ -490,7 +492,7 @@
bch_btree_verify(b);
if (b->written < btree_blocks(b))
- bch_bset_init_next(b);
+ bch_bset_init_next(b, write_block(b), bset_magic(&b->c->sb));
}
static void bch_btree_node_write_sync(struct btree *b)
@@ -515,7 +517,7 @@
static void bch_btree_leaf_dirty(struct btree *b, atomic_t *journal_ref)
{
- struct bset *i = b->sets[b->nsets].data;
+ struct bset *i = btree_bset_last(b);
struct btree_write *w = btree_current_write(b);
BUG_ON(!b->written);
@@ -575,29 +577,12 @@
static void mca_data_free(struct btree *b)
{
- struct bset_tree *t = b->sets;
-
BUG_ON(b->io_mutex.count != 1);
- if (bset_prev_bytes(b) < PAGE_SIZE)
- kfree(t->prev);
- else
- free_pages((unsigned long) t->prev,
- get_order(bset_prev_bytes(b)));
+ bch_btree_keys_free(b);
- if (bset_tree_bytes(b) < PAGE_SIZE)
- kfree(t->tree);
- else
- free_pages((unsigned long) t->tree,
- get_order(bset_tree_bytes(b)));
-
- free_pages((unsigned long) t->data, b->page_order);
-
- t->prev = NULL;
- t->tree = NULL;
- t->data = NULL;
- list_move(&b->list, &b->c->btree_cache_freed);
b->c->bucket_cache_used--;
+ list_move(&b->list, &b->c->btree_cache_freed);
}
static void mca_bucket_free(struct btree *b)
@@ -616,34 +601,16 @@
static void mca_data_alloc(struct btree *b, struct bkey *k, gfp_t gfp)
{
- struct bset_tree *t = b->sets;
- BUG_ON(t->data);
-
- b->page_order = max_t(unsigned,
- ilog2(b->c->btree_pages),
- btree_order(k));
-
- t->data = (void *) __get_free_pages(gfp, b->page_order);
- if (!t->data)
- goto err;
-
- t->tree = bset_tree_bytes(b) < PAGE_SIZE
- ? kmalloc(bset_tree_bytes(b), gfp)
- : (void *) __get_free_pages(gfp, get_order(bset_tree_bytes(b)));
- if (!t->tree)
- goto err;
-
- t->prev = bset_prev_bytes(b) < PAGE_SIZE
- ? kmalloc(bset_prev_bytes(b), gfp)
- : (void *) __get_free_pages(gfp, get_order(bset_prev_bytes(b)));
- if (!t->prev)
- goto err;
-
- list_move(&b->list, &b->c->btree_cache);
- b->c->bucket_cache_used++;
- return;
-err:
- mca_data_free(b);
+ if (!bch_btree_keys_alloc(b,
+ max_t(unsigned,
+ ilog2(b->c->btree_pages),
+ btree_order(k)),
+ gfp)) {
+ b->c->bucket_cache_used++;
+ list_move(&b->list, &b->c->btree_cache);
+ } else {
+ list_move(&b->list, &b->c->btree_cache_freed);
+ }
}
static struct btree *mca_bucket_alloc(struct cache_set *c,
@@ -1111,7 +1078,7 @@
}
b->accessed = 1;
- bch_bset_init_next(b);
+ bch_bset_init_next(b, b->sets->data, bset_magic(&b->c->sb));
mutex_unlock(&c->bucket_lock);
@@ -1298,7 +1265,8 @@
blocks = btree_default_blocks(b->c) * 2 / 3;
if (nodes < 2 ||
- __set_blocks(b->sets[0].data, keys, b->c) > blocks * (nodes - 1))
+ __set_blocks(b->sets[0].data, keys,
+ block_bytes(b->c)) > blocks * (nodes - 1))
return 0;
for (i = 0; i < nodes; i++) {
@@ -1308,8 +1276,8 @@
}
for (i = nodes - 1; i > 0; --i) {
- struct bset *n1 = new_nodes[i]->sets->data;
- struct bset *n2 = new_nodes[i - 1]->sets->data;
+ struct bset *n1 = btree_bset_first(new_nodes[i]);
+ struct bset *n2 = btree_bset_first(new_nodes[i - 1]);
struct bkey *k, *last = NULL;
keys = 0;
@@ -1319,7 +1287,8 @@
k < bset_bkey_last(n2);
k = bkey_next(k)) {
if (__set_blocks(n1, n1->keys + keys +
- bkey_u64s(k), b->c) > blocks)
+ bkey_u64s(k),
+ block_bytes(b->c)) > blocks)
break;
last = k;
@@ -1335,7 +1304,8 @@
* though)
*/
if (__set_blocks(n1, n1->keys + n2->keys,
- b->c) > btree_blocks(new_nodes[i]))
+ block_bytes(b->c)) >
+ btree_blocks(new_nodes[i]))
goto out_nocoalesce;
keys = n2->keys;
@@ -1343,8 +1313,8 @@
last = &r->b->key;
}
- BUG_ON(__set_blocks(n1, n1->keys + keys,
- b->c) > btree_blocks(new_nodes[i]));
+ BUG_ON(__set_blocks(n1, n1->keys + keys, block_bytes(b->c)) >
+ btree_blocks(new_nodes[i]));
if (last)
bkey_copy_key(&new_nodes[i]->key, last);
@@ -1380,7 +1350,7 @@
}
/* We emptied out this node */
- BUG_ON(new_nodes[0]->sets->data->keys);
+ BUG_ON(btree_bset_first(new_nodes[0])->keys);
btree_node_free(new_nodes[0]);
rw_unlock(true, new_nodes[0]);
@@ -1831,19 +1801,6 @@
/* Btree insertion */
-static void shift_keys(struct btree *b, struct bkey *where, struct bkey *insert)
-{
- struct bset *i = b->sets[b->nsets].data;
-
- memmove((uint64_t *) where + bkey_u64s(insert),
- where,
- (void *) bset_bkey_last(i) - (void *) where);
-
- i->keys += bkey_u64s(insert);
- bkey_copy(where, insert);
- bch_bset_fix_lookup_table(b, where);
-}
-
static bool fix_overlapping_extents(struct btree *b, struct bkey *insert,
struct btree_iter *iter,
struct bkey *replace_key)
@@ -1944,13 +1901,13 @@
* depends on us inserting a new key for the top
* here.
*/
- top = bch_bset_search(b, &b->sets[b->nsets],
+ top = bch_bset_search(b, bset_tree_last(b),
insert);
- shift_keys(b, top, k);
+ bch_bset_insert(b, top, k);
} else {
BKEY_PADDED(key) temp;
bkey_copy(&temp.key, k);
- shift_keys(b, k, &temp.key);
+ bch_bset_insert(b, k, &temp.key);
top = bkey_next(k);
}
@@ -1999,7 +1956,7 @@
static bool btree_insert_key(struct btree *b, struct btree_op *op,
struct bkey *k, struct bkey *replace_key)
{
- struct bset *i = b->sets[b->nsets].data;
+ struct bset *i = btree_bset_last(b);
struct bkey *m, *prev;
unsigned status = BTREE_INSERT_STATUS_INSERT;
@@ -2051,10 +2008,10 @@
goto copy;
} else {
BUG_ON(replace_key);
- m = bch_bset_search(b, &b->sets[b->nsets], k);
+ m = bch_bset_search(b, bset_tree_last(b), k);
}
-insert: shift_keys(b, m, k);
+insert: bch_bset_insert(b, m, k);
copy: bkey_copy(m, k);
merged:
bch_check_keys(b, "%u for %s", status,
@@ -2079,8 +2036,9 @@
struct bset *i = write_block(b);
struct bkey *k = insert_keys->keys;
- if (b->written + __set_blocks(i, i->keys + bkey_u64s(k), b->c)
- > btree_blocks(b))
+ if (b->written +
+ __set_blocks(i, i->keys + bkey_u64s(k),
+ block_bytes(b->c)) > btree_blocks(b))
break;
if (bkey_cmp(k, &b->key) <= 0) {
@@ -2130,12 +2088,13 @@
if (IS_ERR(n1))
goto err;
- split = set_blocks(n1->sets[0].data, n1->c) > (btree_blocks(b) * 4) / 5;
+ split = set_blocks(btree_bset_first(n1),
+ block_bytes(n1->c)) > (btree_blocks(b) * 4) / 5;
if (split) {
unsigned keys = 0;
- trace_bcache_btree_node_split(b, n1->sets[0].data->keys);
+ trace_bcache_btree_node_split(b, btree_bset_first(n1)->keys);
n2 = bch_btree_node_alloc(b->c, b->level, true);
if (IS_ERR(n2))
@@ -2154,20 +2113,20 @@
* search tree yet
*/
- while (keys < (n1->sets[0].data->keys * 3) / 5)
- keys += bkey_u64s(bset_bkey_idx(n1->sets[0].data,
+ while (keys < (btree_bset_first(n1)->keys * 3) / 5)
+ keys += bkey_u64s(bset_bkey_idx(btree_bset_first(n1),
keys));
bkey_copy_key(&n1->key,
- bset_bkey_idx(n1->sets[0].data, keys));
- keys += bkey_u64s(bset_bkey_idx(n1->sets[0].data, keys));
+ bset_bkey_idx(btree_bset_first(n1), keys));
+ keys += bkey_u64s(bset_bkey_idx(btree_bset_first(n1), keys));
- n2->sets[0].data->keys = n1->sets[0].data->keys - keys;
- n1->sets[0].data->keys = keys;
+ btree_bset_first(n2)->keys = btree_bset_first(n1)->keys - keys;
+ btree_bset_first(n1)->keys = keys;
- memcpy(n2->sets[0].data->start,
- bset_bkey_last(n1->sets[0].data),
- n2->sets[0].data->keys * sizeof(uint64_t));
+ memcpy(btree_bset_first(n2)->start,
+ bset_bkey_last(btree_bset_first(n1)),
+ btree_bset_first(n2)->keys * sizeof(uint64_t));
bkey_copy_key(&n2->key, &b->key);
@@ -2175,7 +2134,7 @@
bch_btree_node_write(n2, &cl);
rw_unlock(true, n2);
} else {
- trace_bcache_btree_node_compact(b, n1->sets[0].data->keys);
+ trace_bcache_btree_node_compact(b, btree_bset_first(n1)->keys);
bch_btree_insert_keys(n1, op, insert_keys, replace_key);
}
@@ -2256,7 +2215,7 @@
-EINTR;
}
} else {
- BUG_ON(write_block(b) != b->sets[b->nsets].data);
+ BUG_ON(write_block(b) != btree_bset_last(b));
if (bch_btree_insert_keys(b, op, insert_keys, replace_key)) {
if (!b->level)
diff --git a/drivers/md/bcache/btree.h b/drivers/md/bcache/btree.h
index 2a5a848..b354117 100644
--- a/drivers/md/bcache/btree.h
+++ b/drivers/md/bcache/btree.h
@@ -180,9 +180,9 @@
return b->writes + (btree_node_write_idx(b) ^ 1);
}
-static inline unsigned bset_offset(struct btree *b, struct bset *i)
+static inline struct bset_tree *bset_tree_last(struct btree *b)
{
- return (((size_t) i) - ((size_t) b->sets->data)) >> 9;
+ return b->sets + b->nsets;
}
static inline struct bset *btree_bset_first(struct btree *b)
@@ -190,6 +190,11 @@
return b->sets->data;
}
+static inline struct bset *btree_bset_last(struct btree *b)
+{
+ return bset_tree_last(b)->data;
+}
+
static inline unsigned bset_byte_offset(struct btree *b, struct bset *i)
{
return ((size_t) i) - ((size_t) b->sets->data);
diff --git a/drivers/md/bcache/debug.c b/drivers/md/bcache/debug.c
index 955fa1d3..5a78137 100644
--- a/drivers/md/bcache/debug.c
+++ b/drivers/md/bcache/debug.c
@@ -123,7 +123,8 @@
for (i = (start); \
(void *) i < (void *) (start) + (KEY_SIZE(&b->key) << 9) &&\
i->seq == (start)->seq; \
- i = (void *) i + set_blocks(i, b->c) * block_bytes(b->c))
+ i = (void *) i + set_blocks(i, block_bytes(b->c)) * \
+ block_bytes(b->c))
void bch_btree_verify(struct btree *b)
{
diff --git a/drivers/md/bcache/journal.c b/drivers/md/bcache/journal.c
index 5e14e33..18039af 100644
--- a/drivers/md/bcache/journal.c
+++ b/drivers/md/bcache/journal.c
@@ -95,7 +95,7 @@
return ret;
}
- blocks = set_blocks(j, ca->set);
+ blocks = set_blocks(j, block_bytes(ca->set));
while (!list_empty(list)) {
i = list_first_entry(list,
@@ -579,7 +579,8 @@
struct cache *ca;
struct journal_write *w = c->journal.cur;
struct bkey *k = &c->journal.key;
- unsigned i, sectors = set_blocks(w->data, c) * c->sb.block_size;
+ unsigned i, sectors = set_blocks(w->data, block_bytes(c)) *
+ c->sb.block_size;
struct bio *bio;
struct bio_list list;
@@ -595,7 +596,7 @@
continue_at(cl, journal_write, system_wq);
}
- c->journal.blocks_free -= set_blocks(w->data, c);
+ c->journal.blocks_free -= set_blocks(w->data, block_bytes(c));
w->data->btree_level = c->root->level;
@@ -685,7 +686,7 @@
struct journal_write *w = c->journal.cur;
sectors = __set_blocks(w->data, w->data->keys + nkeys,
- c) * c->sb.block_size;
+ block_bytes(c)) * c->sb.block_size;
if (sectors <= min_t(size_t,
c->journal.blocks_free * c->sb.block_size,
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index 1fc8165..12057a4 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -1477,7 +1477,7 @@
c->block_bits = ilog2(sb->block_size);
c->nr_uuids = bucket_bytes(c) / sizeof(struct uuid_entry);
- c->btree_pages = c->sb.bucket_size / PAGE_SECTORS;
+ c->btree_pages = bucket_pages(c);
if (c->btree_pages > BTREE_MAX_PAGES)
c->btree_pages = max_t(int, c->btree_pages / 4,
BTREE_MAX_PAGES);