[11/25] bcache: disassemble the big if() checks in bch_cache_set_alloc()
diff mbox series

Message ID 20200725120039.91071-12-colyli@suse.de
State New
Headers show
Series
  • bcache patches for Linux v5.9
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Commit Message

Coly Li July 25, 2020, noon UTC
In bch_cache_set_alloc() there is a big if() checks combined by 11 items
together. When this big if() statement fails, it is difficult to tell
exactly which item fails indeed.

This patch disassembles this big if() checks into 11 single if() checks,
which makes code debug more easier.

Signed-off-by: Coly Li <colyli@suse.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
---
 drivers/md/bcache/super.c | 52 ++++++++++++++++++++++++++++-----------
 1 file changed, 37 insertions(+), 15 deletions(-)

Patch
diff mbox series

diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index fd8c9ee4d4a6..7ad6bbabfc66 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -1865,21 +1865,43 @@  struct cache_set *bch_cache_set_alloc(struct cache_sb *sb)
 	iter_size = (sb->bucket_size / sb->block_size + 1) *
 		sizeof(struct btree_iter_set);
 
-	if (!(c->devices = kcalloc(c->nr_uuids, sizeof(void *), GFP_KERNEL)) ||
-	    mempool_init_slab_pool(&c->search, 32, bch_search_cache) ||
-	    mempool_init_kmalloc_pool(&c->bio_meta, 2,
-				sizeof(struct bbio) + sizeof(struct bio_vec) *
-				bucket_pages(c)) ||
-	    mempool_init_kmalloc_pool(&c->fill_iter, 1, iter_size) ||
-	    bioset_init(&c->bio_split, 4, offsetof(struct bbio, bio),
-			BIOSET_NEED_BVECS|BIOSET_NEED_RESCUER) ||
-	    !(c->uuids = alloc_bucket_pages(GFP_KERNEL, c)) ||
-	    !(c->moving_gc_wq = alloc_workqueue("bcache_gc",
-						WQ_MEM_RECLAIM, 0)) ||
-	    bch_journal_alloc(c) ||
-	    bch_btree_cache_alloc(c) ||
-	    bch_open_buckets_alloc(c) ||
-	    bch_bset_sort_state_init(&c->sort, ilog2(c->btree_pages)))
+	c->devices = kcalloc(c->nr_uuids, sizeof(void *), GFP_KERNEL);
+	if (!c->devices)
+		goto err;
+
+	if (mempool_init_slab_pool(&c->search, 32, bch_search_cache))
+		goto err;
+
+	if (mempool_init_kmalloc_pool(&c->bio_meta, 2,
+			sizeof(struct bbio) +
+			sizeof(struct bio_vec) * bucket_pages(c)))
+		goto err;
+
+	if (mempool_init_kmalloc_pool(&c->fill_iter, 1, iter_size))
+		goto err;
+
+	if (bioset_init(&c->bio_split, 4, offsetof(struct bbio, bio),
+			BIOSET_NEED_BVECS|BIOSET_NEED_RESCUER))
+		goto err;
+
+	c->uuids = alloc_bucket_pages(GFP_KERNEL, c);
+	if (!c->uuids)
+		goto err;
+
+	c->moving_gc_wq = alloc_workqueue("bcache_gc", WQ_MEM_RECLAIM, 0);
+	if (!c->moving_gc_wq)
+		goto err;
+
+	if (bch_journal_alloc(c))
+		goto err;
+
+	if (bch_btree_cache_alloc(c))
+		goto err;
+
+	if (bch_open_buckets_alloc(c))
+		goto err;
+
+	if (bch_bset_sort_state_init(&c->sort, ilog2(c->btree_pages)))
 		goto err;
 
 	c->congested_read_threshold_us	= 2000;