These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / md / persistent-data / dm-space-map-metadata.c

diff --git a/kernel/drivers/md/persistent-data/dm-space-map-metadata.c b/kernel/drivers/md/persistent-data/dm-space-map-metadata.c
index 5309129..7e44005 100644 (file)
--- a/kernel/drivers/md/persistent-data/dm-space-map-metadata.c
+++ b/kernel/drivers/md/persistent-data/dm-space-map-metadata.c
@@ -136,7 +136,7 @@ static int brb_push(struct bop_ring_buffer *brb,
        return 0;
 }
 
-static int brb_pop(struct bop_ring_buffer *brb, struct block_op *result)
+static int brb_peek(struct bop_ring_buffer *brb, struct block_op *result)
 {
        struct block_op *bop;
 
@@ -147,6 +147,14 @@ static int brb_pop(struct bop_ring_buffer *brb, struct block_op *result)
        result->type = bop->type;
        result->block = bop->block;
 
+       return 0;
+}
+
+static int brb_pop(struct bop_ring_buffer *brb)
+{
+       if (brb_empty(brb))
+               return -ENODATA;
+
        brb->begin = brb_next(brb, brb->begin);
 
        return 0;
@@ -211,7 +219,7 @@ static int apply_bops(struct sm_metadata *smm)
        while (!brb_empty(&smm->uncommitted)) {
                struct block_op bop;
 
-               r = brb_pop(&smm->uncommitted, &bop);
+               r = brb_peek(&smm->uncommitted, &bop);
                if (r) {
                        DMERR("bug in bop ring buffer");
                        break;
@@ -220,6 +228,8 @@ static int apply_bops(struct sm_metadata *smm)
                r = commit_bop(smm, &bop);
                if (r)
                        break;
+
+               brb_pop(&smm->uncommitted);
        }
 
        return r;
@@ -683,7 +693,6 @@ static struct dm_space_map bootstrap_ops = {
 static int sm_metadata_extend(struct dm_space_map *sm, dm_block_t extra_blocks)
 {
        int r, i;
-       enum allocation_event ev;
        struct sm_metadata *smm = container_of(sm, struct sm_metadata, sm);
        dm_block_t old_len = smm->ll.nr_blocks;
 
@@ -705,11 +714,12 @@ static int sm_metadata_extend(struct dm_space_map *sm, dm_block_t extra_blocks)
         * allocate any new blocks.
         */
        do {
-               for (i = old_len; !r && i < smm->begin; i++) {
-                       r = sm_ll_inc(&smm->ll, i, &ev);
-                       if (r)
-                               goto out;
-               }
+               for (i = old_len; !r && i < smm->begin; i++)
+                       r = add_bop(smm, BOP_INC, i);
+
+               if (r)
+                       goto out;
+
                old_len = smm->begin;
 
                r = apply_bops(smm);
@@ -754,7 +764,6 @@ int dm_sm_metadata_create(struct dm_space_map *sm,
 {
        int r;
        dm_block_t i;
-       enum allocation_event ev;
        struct sm_metadata *smm = container_of(sm, struct sm_metadata, sm);
 
        smm->begin = superblock + 1;
@@ -782,7 +791,7 @@ int dm_sm_metadata_create(struct dm_space_map *sm,
         * allocated blocks that they were built from.
         */
        for (i = superblock; !r && i < smm->begin; i++)
-               r = sm_ll_inc(&smm->ll, i, &ev);
+               r = add_bop(smm, BOP_INC, i);
 
        if (r)
                return r;