bcache: Convert bch_btree_insert() to bch_btree_map_leaf_nodes()

Last of the btree_map() conversions. Main visible effect is
bch_btree_insert() is no longer taking a struct btree_op as an argument
anymore - there's no fancy state machine stuff going on, it's just a
normal function.

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

diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c
index 441524d..f5aa4ad 100644 (file)
--- a/drivers/md/bcache/btree.c
+++ b/drivers/md/bcache/btree.c
@@ -2174,61 +2174,56 @@ out:
        return ret;
 }
 
-static int bch_btree_insert_recurse(struct btree *b, struct btree_op *op,
-                                   struct keylist *keys, atomic_t *journal_ref,
-                                   struct bkey *replace_key)
-{
-       if (bch_keylist_empty(keys))
-               return 0;
-
-       if (b->level) {
-               struct bkey *k;
-
-               k = bch_next_recurse_key(b, &START_KEY(keys->keys));
-               if (!k) {
-                       btree_bug(b, "no key to recurse on at level %i/%i",
-                                 b->level, b->c->root->level);
+struct btree_insert_op {
+       struct btree_op op;
+       struct keylist  *keys;
+       atomic_t        *journal_ref;
+       struct bkey     *replace_key;
+};
 
-                       bch_keylist_reset(keys);
-                       return -EIO;
-               }
+int btree_insert_fn(struct btree_op *b_op, struct btree *b)
+{
+       struct btree_insert_op *op = container_of(b_op,
+                                       struct btree_insert_op, op);
 
-               return btree(insert_recurse, k, b, op, keys,
-                            journal_ref, replace_key);
-       } else {
-               return bch_btree_insert_node(b, op, keys,
-                                            journal_ref, replace_key);
-       }
+       int ret = bch_btree_insert_node(b, &op->op, op->keys,
+                                       op->journal_ref, op->replace_key);
+       if (ret && !bch_keylist_empty(op->keys))
+               return ret;
+       else
+               return MAP_DONE;
 }
 
-int bch_btree_insert(struct btree_op *op, struct cache_set *c,
-                    struct keylist *keys, atomic_t *journal_ref,
-                    struct bkey *replace_key)
+int bch_btree_insert(struct cache_set *c, struct keylist *keys,
+                    atomic_t *journal_ref, struct bkey *replace_key)
 {
+       struct btree_insert_op op;
        int ret = 0;
 
+       BUG_ON(current->bio_list);
        BUG_ON(bch_keylist_empty(keys));
 
-       while (!bch_keylist_empty(keys)) {
-               op->lock = 0;
-               ret = btree_root(insert_recurse, c, op, keys,
-                                journal_ref, replace_key);
+       bch_btree_op_init(&op.op, 0);
+       op.keys         = keys;
+       op.journal_ref  = journal_ref;
+       op.replace_key  = replace_key;
 
-               if (ret == -EAGAIN) {
-                       BUG();
-                       ret = 0;
-               } else if (ret) {
-                       struct bkey *k;
+       while (!ret && !bch_keylist_empty(keys)) {
+               op.op.lock = 0;
+               ret = bch_btree_map_leaf_nodes(&op.op, c,
+                                              &START_KEY(keys->keys),
+                                              btree_insert_fn);
+       }
 
-                       pr_err("error %i", ret);
+       if (ret) {
+               struct bkey *k;
 
-                       while ((k = bch_keylist_pop(keys)))
-                               bkey_put(c, k, 0);
-               }
-       }
+               pr_err("error %i", ret);
 
-       if (op->insert_collision)
-               return -ESRCH;
+               while ((k = bch_keylist_pop(keys)))
+                       bkey_put(c, k, 0);
+       } else if (op.op.insert_collision)
+               ret = -ESRCH;
 
        return ret;
 }

diff --git a/drivers/md/bcache/btree.h b/drivers/md/bcache/btree.h
index 6ff08be..8fc1e89 100644 (file)
--- a/drivers/md/bcache/btree.h
+++ b/drivers/md/bcache/btree.h
@@ -281,8 +281,8 @@ struct btree *bch_btree_node_get(struct cache_set *, struct bkey *, int, bool);
 
 int bch_btree_insert_check_key(struct btree *, struct btree_op *,
                               struct bkey *);
-int bch_btree_insert(struct btree_op *, struct cache_set *,
-                    struct keylist *, atomic_t *, struct bkey *);
+int bch_btree_insert(struct cache_set *, struct keylist *,
+                    atomic_t *, struct bkey *);
 
 int bch_gc_thread_start(struct cache_set *);
 size_t bch_btree_gc_finish(struct cache_set *);

diff --git a/drivers/md/bcache/journal.c b/drivers/md/bcache/journal.c
index 592adf5..86de64a 100644 (file)
--- a/drivers/md/bcache/journal.c
+++ b/drivers/md/bcache/journal.c
@@ -302,10 +302,8 @@ int bch_journal_replay(struct cache_set *s, struct list_head *list)
 
        uint64_t start = i->j.last_seq, end = i->j.seq, n = start;
        struct keylist keylist;
-       struct btree_op op;
 
        bch_keylist_init(&keylist);
-       bch_btree_op_init(&op, SHRT_MAX);
 
        list_for_each_entry(i, list, list) {
                BUG_ON(i->pin && atomic_read(i->pin) != 1);
@@ -322,7 +320,7 @@ int bch_journal_replay(struct cache_set *s, struct list_head *list)
                        bkey_copy(keylist.top, k);
                        bch_keylist_push(&keylist);
 
-                       ret = bch_btree_insert(&op, s, &keylist, i->pin, NULL);
+                       ret = bch_btree_insert(s, &keylist, i->pin, NULL);
                        if (ret)
                                goto err;
 

diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c
index bcce06a..6cee2ae 100644 (file)
--- a/drivers/md/bcache/request.c
+++ b/drivers/md/bcache/request.c
@@ -237,7 +237,7 @@ static void bch_data_insert_keys(struct closure *cl)
                                          s->flush_journal
                                          ? &s->cl : NULL);
 
-       ret = bch_btree_insert(&s->op, s->c, &s->insert_keys,
+       ret = bch_btree_insert(s->c, &s->insert_keys,
                               journal_ref, replace_key);
        if (ret == -ESRCH) {
                s->insert_collision = true;

diff --git a/drivers/md/bcache/writeback.c b/drivers/md/bcache/writeback.c
index 312032e..ab0f6b4 100644 (file)
--- a/drivers/md/bcache/writeback.c
+++ b/drivers/md/bcache/writeback.c
@@ -139,12 +139,10 @@ static void write_dirty_finish(struct closure *cl)
 
        /* This is kind of a dumb way of signalling errors. */
        if (KEY_DIRTY(&w->key)) {
+               int ret;
                unsigned i;
-               struct btree_op op;
                struct keylist keys;
-               int ret;
 
-               bch_btree_op_init(&op, -1);
                bch_keylist_init(&keys);
 
                bkey_copy(keys.top, &w->key);
@@ -154,7 +152,7 @@ static void write_dirty_finish(struct closure *cl)
                for (i = 0; i < KEY_PTRS(&w->key); i++)
                        atomic_inc(&PTR_BUCKET(dc->disk.c, &w->key, i)->pin);
 
-               ret = bch_btree_insert(&op, dc->disk.c, &keys, NULL, &w->key);
+               ret = bch_btree_insert(dc->disk.c, &keys, NULL, &w->key);
 
                if (ret)
                        trace_bcache_writeback_collision(&w->key);