bcache: Bkey indexing renaming

More refactoring:

node() -> bset_bkey_idx()
end() -> bset_bkey_last()

Signed-off-by: Kent Overstreet <kmo@daterainc.com>

7 files changed, 63 insertions, 53 deletions

diff --git a/drivers/md/bcache/bcache.h b/drivers/md/bcache/bcache.h
index 3fd87323368c..2b46c86ac440 100644
--- a/drivers/md/bcache/bcache.h
+++ b/drivers/md/bcache/bcache.h
@@ -724,9 +724,6 @@ struct bbio {
 #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 node(i, j)		((struct bkey *) ((i)->d + (j)))
-#define end(i)			node(i, (i)->keys)
-
 #define btree_data_space(b)	(PAGE_SIZE << (b)->page_order)
 
 #define prios_per_bucket(c)				\
@@ -791,18 +788,14 @@ static inline bool ptr_available(struct cache_set *c, const struct bkey *k,
 
 /* Btree key macros */
 
-static inline void bkey_init(struct bkey *k)
-{
-	*k = ZERO_KEY;
-}
-
 /*
  * This is used for various on disk data structures - cache_sb, prio_set, bset,
  * jset: The checksum is _always_ the first 8 bytes of these structs
  */
 #define csum_set(i)							\
 	bch_crc64(((void *) (i)) + sizeof(uint64_t),			\
-	      ((void *) end(i)) - (((void *) (i)) + sizeof(uint64_t)))
+		  ((void *) bset_bkey_last(i)) -			\
+		  (((void *) (i)) + sizeof(uint64_t)))
 
 /* Error handling macros */
 
diff --git a/drivers/md/bcache/bset.c b/drivers/md/bcache/bset.c
index f91347a55c41..bfee926e35f0 100644
--- a/drivers/md/bcache/bset.c
+++ b/drivers/md/bcache/bset.c
@@ -500,7 +500,7 @@ static void make_bfloat(struct bset_tree *t, unsigned j)
 		: tree_to_prev_bkey(t, j >> ffs(j));
 
 	struct bkey *r = is_power_of_2(j + 1)
-		? node(t->data, t->data->keys - bkey_u64s(&t->end))
+		? bset_bkey_idx(t->data, t->data->keys - bkey_u64s(&t->end))
 		: tree_to_bkey(t, j >> (ffz(j) + 1));
 
 	BUG_ON(m < l || m > r);
@@ -559,7 +559,7 @@ static void bset_build_written_tree(struct btree *b)
 	bset_alloc_tree(b, t);
 
 	t->size = min_t(unsigned,
-			bkey_to_cacheline(t, end(t->data)),
+			bkey_to_cacheline(t, bset_bkey_last(t->data)),
 			b->sets->tree + bset_tree_space(b) - t->tree);
 
 	if (t->size < 2) {
@@ -582,7 +582,7 @@ static void bset_build_written_tree(struct btree *b)
 		t->tree[j].m = bkey_to_cacheline_offset(k);
 	}
 
-	while (bkey_next(k) != end(t->data))
+	while (bkey_next(k) != bset_bkey_last(t->data))
 		k = bkey_next(k);
 
 	t->end = *k;
@@ -600,7 +600,7 @@ void bch_bset_fix_invalidated_key(struct btree *b, struct bkey *k)
 	unsigned inorder, j = 1;
 
 	for (t = b->sets; t <= &b->sets[b->nsets]; t++)
-		if (k < end(t->data))
+		if (k < bset_bkey_last(t->data))
 			goto found_set;
 
 	BUG();
@@ -613,7 +613,7 @@ found_set:
 	if (k == t->data->start)
 		goto fix_left;
 
-	if (bkey_next(k) == end(t->data)) {
+	if (bkey_next(k) == bset_bkey_last(t->data)) {
 		t->end = *k;
 		goto fix_right;
 	}
@@ -679,7 +679,7 @@ void bch_bset_fix_lookup_table(struct btree *b, struct bkey *k)
 	/* Possibly add a new entry to the end of the lookup table */
 
 	for (k = table_to_bkey(t, t->size - 1);
-	     k != end(t->data);
+	     k != bset_bkey_last(t->data);
 	     k = bkey_next(k))
 		if (t->size == bkey_to_cacheline(t, k)) {
 			t->prev[t->size] = bkey_to_cacheline_offset(k);
@@ -715,7 +715,7 @@ static struct bset_search_iter bset_search_write_set(struct btree *b,
 	unsigned li = 0, ri = t->size;
 
 	BUG_ON(!b->nsets &&
-	       t->size < bkey_to_cacheline(t, end(t->data)));
+	       t->size < bkey_to_cacheline(t, bset_bkey_last(t->data)));
 
 	while (li + 1 != ri) {
 		unsigned m = (li + ri) >> 1;
@@ -728,7 +728,7 @@ static struct bset_search_iter bset_search_write_set(struct btree *b,
 
 	return (struct bset_search_iter) {
 		table_to_bkey(t, li),
-		ri < t->size ? table_to_bkey(t, ri) : end(t->data)
+		ri < t->size ? table_to_bkey(t, ri) : bset_bkey_last(t->data)
 	};
 }
 
@@ -780,7 +780,7 @@ static struct bset_search_iter bset_search_tree(struct btree *b,
 			f = &t->tree[inorder_next(j, t->size)];
 			r = cacheline_to_bkey(t, inorder, f->m);
 		} else
-			r = end(t->data);
+			r = bset_bkey_last(t->data);
 	} else {
 		r = cacheline_to_bkey(t, inorder, f->m);
 
@@ -816,7 +816,7 @@ struct bkey *__bch_bset_search(struct btree *b, struct bset_tree *t,
 
 	if (unlikely(!t->size)) {
 		i.l = t->data->start;
-		i.r = end(t->data);
+		i.r = bset_bkey_last(t->data);
 	} else if (bset_written(b, t)) {
 		/*
 		 * Each node in the auxiliary search tree covers a certain range
@@ -826,7 +826,7 @@ struct bkey *__bch_bset_search(struct btree *b, struct bset_tree *t,
 		 */
 
 		if (unlikely(bkey_cmp(search, &t->end) >= 0))
-			return end(t->data);
+			return bset_bkey_last(t->data);
 
 		if (unlikely(bkey_cmp(search, t->data->start) < 0))
 			return t->data->start;
@@ -842,7 +842,7 @@ struct bkey *__bch_bset_search(struct btree *b, struct bset_tree *t,
 			  inorder_to_tree(bkey_to_cacheline(t, i.l), t)),
 				search) > 0);
 
-		BUG_ON(i.r != end(t->data) &&
+		BUG_ON(i.r != bset_bkey_last(t->data) &&
 		       bkey_cmp(i.r, search) <= 0);
 	}
 
@@ -897,7 +897,7 @@ struct bkey *__bch_btree_iter_init(struct btree *b, struct btree_iter *iter,
 
 	for (; start <= &b->sets[b->nsets]; start++) {
 		ret = bch_bset_search(b, start, search);
-		bch_btree_iter_push(iter, ret, end(start->data));
+		bch_btree_iter_push(iter, ret, bset_bkey_last(start->data));
 	}
 
 	return ret;
@@ -1067,7 +1067,7 @@ static void __btree_sort(struct btree *b, struct btree_iter *iter,
 	} else {
 		b->sets[start].data->keys = out->keys;
 		memcpy(b->sets[start].data->start, out->start,
-		       (void *) end(out) - (void *) out->start);
+		       (void *) bset_bkey_last(out) - (void *) out->start);
 	}
 
 	if (used_mempool)
diff --git a/drivers/md/bcache/bset.h b/drivers/md/bcache/bset.h
index 303d31a3b9e6..88b6edbf508b 100644
--- a/drivers/md/bcache/bset.h
+++ b/drivers/md/bcache/bset.h
@@ -190,14 +190,6 @@ struct bset_tree {
 	struct bset	*data;
 };
 
-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);
-}
-
 /* Keylists */
 
 struct keylist {
@@ -261,6 +253,28 @@ struct bkey *bch_keylist_pop(struct keylist *);
 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 *);
diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c
index f0a6399fdd3c..8aaaf16637a0 100644
--- a/drivers/md/bcache/btree.c
+++ b/drivers/md/bcache/btree.c
@@ -197,7 +197,7 @@ void bkey_put(struct cache_set *c, struct bkey *k)
 static uint64_t btree_csum_set(struct btree *b, struct bset *i)
 {
 	uint64_t crc = b->key.ptr[0];
-	void *data = (void *) i + 8, *end = end(i);
+	void *data = (void *) i + 8, *end = bset_bkey_last(i);
 
 	crc = bch_crc64_update(crc, data, end - data);
 	return crc ^ 0xffffffffffffffffULL;
@@ -251,7 +251,7 @@ void bch_btree_node_read_done(struct btree *b)
 		if (i != b->sets[0].data && !i->keys)
 			goto err;
 
-		bch_btree_iter_push(iter, i->start, end(i));
+		bch_btree_iter_push(iter, i->start, bset_bkey_last(i));
 
 		b->written += set_blocks(i, b->c);
 	}
@@ -1310,7 +1310,7 @@ static int btree_gc_coalesce(struct btree *b, struct btree_op *op,
 
 		if (i > 1) {
 			for (k = n2->start;
-			     k < end(n2);
+			     k < bset_bkey_last(n2);
 			     k = bkey_next(k)) {
 				if (__set_blocks(n1, n1->keys + keys +
 						 bkey_u64s(k), b->c) > blocks)
@@ -1343,16 +1343,17 @@ static int btree_gc_coalesce(struct btree *b, struct btree_op *op,
 		if (last)
 			bkey_copy_key(&new_nodes[i]->key, last);
 
-		memcpy(end(n1),
+		memcpy(bset_bkey_last(n1),
 		       n2->start,
-		       (void *) node(n2, keys) - (void *) n2->start);
+		       (void *) bset_bkey_idx(n2, keys) - (void *) n2->start);
 
 		n1->keys += keys;
 		r[i].keys = n1->keys;
 
 		memmove(n2->start,
-			node(n2, keys),
-			(void *) end(n2) - (void *) node(n2, keys));
+			bset_bkey_idx(n2, keys),
+			(void *) bset_bkey_last(n2) -
+			(void *) bset_bkey_idx(n2, keys));
 
 		n2->keys -= keys;
 
@@ -1830,7 +1831,7 @@ static void shift_keys(struct btree *b, struct bkey *where, struct bkey *insert)
 
 	memmove((uint64_t *) where + bkey_u64s(insert),
 		where,
-		(void *) end(i) - (void *) where);
+		(void *) bset_bkey_last(i) - (void *) where);
 
 	i->keys += bkey_u64s(insert);
 	bkey_copy(where, insert);
@@ -2014,7 +2015,7 @@ static bool btree_insert_key(struct btree *b, struct btree_op *op,
 			bcache_dev_sectors_dirty_add(b->c, KEY_INODE(k),
 						     KEY_START(k), KEY_SIZE(k));
 
-		while (m != end(i) &&
+		while (m != bset_bkey_last(i) &&
 		       bkey_cmp(k, &START_KEY(m)) > 0)
 			prev = m, m = bkey_next(m);
 
@@ -2028,12 +2029,12 @@ static bool btree_insert_key(struct btree *b, struct btree_op *op,
 			goto merged;
 
 		status = BTREE_INSERT_STATUS_OVERWROTE;
-		if (m != end(i) &&
+		if (m != bset_bkey_last(i) &&
 		    KEY_PTRS(m) == KEY_PTRS(k) && !KEY_SIZE(m))
 			goto copy;
 
 		status = BTREE_INSERT_STATUS_FRONT_MERGE;
-		if (m != end(i) &&
+		if (m != bset_bkey_last(i) &&
 		    bch_bkey_try_merge(b, k, m))
 			goto copy;
 	} else {
@@ -2142,16 +2143,18 @@ static int btree_split(struct btree *b, struct btree_op *op,
 		 */
 
 		while (keys < (n1->sets[0].data->keys * 3) / 5)
-			keys += bkey_u64s(node(n1->sets[0].data, keys));
+			keys += bkey_u64s(bset_bkey_idx(n1->sets[0].data,
+							keys));
 
-		bkey_copy_key(&n1->key, node(n1->sets[0].data, keys));
-		keys += bkey_u64s(node(n1->sets[0].data, 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));
 
 		n2->sets[0].data->keys = n1->sets[0].data->keys - keys;
 		n1->sets[0].data->keys = keys;
 
 		memcpy(n2->sets[0].data->start,
-		       end(n1->sets[0].data),
+		       bset_bkey_last(n1->sets[0].data),
 		       n2->sets[0].data->keys * sizeof(uint64_t));
 
 		bkey_copy_key(&n2->key, &b->key);
diff --git a/drivers/md/bcache/debug.c b/drivers/md/bcache/debug.c
index 8887c550d56c..955fa1d31774 100644
--- a/drivers/md/bcache/debug.c
+++ b/drivers/md/bcache/debug.c
@@ -84,7 +84,7 @@ static void dump_bset(struct btree *b, struct bset *i, unsigned set)
 	unsigned j;
 	char buf[80];
 
-	for (k = i->start; k < end(i); k = next) {
+	for (k = i->start; k < bset_bkey_last(i); k = next) {
 		next = bkey_next(k);
 
 		bch_bkey_to_text(buf, sizeof(buf), k);
@@ -102,7 +102,7 @@ static void dump_bset(struct btree *b, struct bset *i, unsigned set)
 
 		printk(" %s\n", bch_ptr_status(b->c, k));
 
-		if (next < end(i) &&
+		if (next < bset_bkey_last(i) &&
 		    bkey_cmp(k, !b->level ? &START_KEY(next) : next) > 0)
 			printk(KERN_ERR "Key skipped backwards\n");
 	}
@@ -162,7 +162,7 @@ void bch_btree_verify(struct btree *b)
 	if (inmemory->keys != sorted->keys ||
 	    memcmp(inmemory->start,
 		   sorted->start,
-		   (void *) end(inmemory) - (void *) inmemory->start)) {
+		   (void *) bset_bkey_last(inmemory) - (void *) inmemory->start)) {
 		struct bset *i;
 		unsigned j;
 
diff --git a/drivers/md/bcache/journal.c b/drivers/md/bcache/journal.c
index 9d32d5790822..5e14e3325ec1 100644
--- a/drivers/md/bcache/journal.c
+++ b/drivers/md/bcache/journal.c
@@ -284,7 +284,7 @@ void bch_journal_mark(struct cache_set *c, struct list_head *list)
 		}
 
 		for (k = i->j.start;
-		     k < end(&i->j);
+		     k < bset_bkey_last(&i->j);
 		     k = bkey_next(k)) {
 			unsigned j;
 
@@ -322,7 +322,7 @@ int bch_journal_replay(struct cache_set *s, struct list_head *list)
 				 n, i->j.seq - 1, start, end);
 
 		for (k = i->j.start;
-		     k < end(&i->j);
+		     k < bset_bkey_last(&i->j);
 		     k = bkey_next(k)) {
 			trace_bcache_journal_replay_key(k);
 
@@ -751,7 +751,7 @@ atomic_t *bch_journal(struct cache_set *c,
 
 	w = journal_wait_for_write(c, bch_keylist_nkeys(keys));
 
-	memcpy(end(w->data), keys->keys, bch_keylist_bytes(keys));
+	memcpy(bset_bkey_last(w->data), keys->keys, bch_keylist_bytes(keys));
 	w->data->keys += bch_keylist_nkeys(keys);
 
 	ret = &fifo_back(&c->journal.pin);
diff --git a/include/uapi/linux/bcache.h b/include/uapi/linux/bcache.h
index 164a7e263988..ae66311be82f 100644
--- a/include/uapi/linux/bcache.h
+++ b/include/uapi/linux/bcache.h
@@ -118,7 +118,7 @@ static inline struct bkey *bkey_next(const struct bkey *k)
 	return (struct bkey *) (d + bkey_u64s(k));
 }
 
-static inline struct bkey *bkey_last(const struct bkey *k, unsigned nr_keys)
+static inline struct bkey *bkey_idx(const struct bkey *k, unsigned nr_keys)
 {
 	__u64 *d = (void *) k;
 	return (struct bkey *) (d + nr_keys);