Merge tag 'for-4.16-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux

Pull btrfs fixes from David Sterba:
 "There's an important revert in this pull request that needs to go to
  stable as it causes a corruption on big endian machines.

  The other fix is for FIEMAP incorrectly reporting shared extents
  before a sync and one fix for a crash in raid56.

  So far we got only one report about the BE corruption, the stable
  kernels were out for like a week, so hopefully the scope of the damage
  is low"

* tag 'for-4.16-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  Revert "btrfs: use proper endianness accessors for super_copy"
  btrfs: add missing initialization in btrfs_check_shared
  btrfs: Fix NULL pointer exception in find_bio_stripe

4 files changed, 15 insertions, 15 deletions

diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index f94b2d8c744a..26484648d090 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -1519,6 +1519,7 @@ int btrfs_check_shared(struct btrfs_root *root, u64 inum, u64 bytenr)
                 if (!node)
                         break;
                 bytenr = node->val;
+                shared.share_count = 0;
                 cond_resched();
         }
 
diff --git a/fs/btrfs/raid56.c b/fs/btrfs/raid56.c
index dec0907dfb8a..fcfc20de2df3 100644
--- a/fs/btrfs/raid56.c
+++ b/fs/btrfs/raid56.c
@@ -1370,6 +1370,7 @@ static int find_bio_stripe(struct btrfs_raid_bio *rbio,
                 stripe_start = stripe->physical;
                 if (physical >= stripe_start &&
                     physical < stripe_start + rbio->stripe_len &&
+                    stripe->dev->bdev &&
                     bio->bi_disk == stripe->dev->bdev->bd_disk &&
                     bio->bi_partno == stripe->dev->bdev->bd_partno) {
                         return i;
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index d11c70bff5a9..a8bafed931f4 100644
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -423,7 +423,7 @@ static ssize_t btrfs_nodesize_show(struct kobject *kobj,
 {
         struct btrfs_fs_info *fs_info = to_fs_info(kobj);
 
-        return snprintf(buf, PAGE_SIZE, "%u\n", fs_info->nodesize);
+        return snprintf(buf, PAGE_SIZE, "%u\n", fs_info->super_copy->nodesize);
 }
 
 BTRFS_ATTR(, nodesize, btrfs_nodesize_show);
@@ -433,7 +433,8 @@ static ssize_t btrfs_sectorsize_show(struct kobject *kobj,
 {
         struct btrfs_fs_info *fs_info = to_fs_info(kobj);
 
-        return snprintf(buf, PAGE_SIZE, "%u\n", fs_info->sectorsize);
+        return snprintf(buf, PAGE_SIZE, "%u\n",
+                        fs_info->super_copy->sectorsize);
 }
 
 BTRFS_ATTR(, sectorsize, btrfs_sectorsize_show);
@@ -443,7 +444,8 @@ static ssize_t btrfs_clone_alignment_show(struct kobject *kobj,
 {
         struct btrfs_fs_info *fs_info = to_fs_info(kobj);
 
-        return snprintf(buf, PAGE_SIZE, "%u\n", fs_info->sectorsize);
+        return snprintf(buf, PAGE_SIZE, "%u\n",
+                        fs_info->super_copy->sectorsize);
 }
 
 BTRFS_ATTR(, clone_alignment, btrfs_clone_alignment_show);
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 9220f004001c..04f07144b45c 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -1722,23 +1722,19 @@ static void update_super_roots(struct btrfs_fs_info *fs_info)
 
         super = fs_info->super_copy;
 
-        /* update latest btrfs_super_block::chunk_root refs */
         root_item = &fs_info->chunk_root->root_item;
-        btrfs_set_super_chunk_root(super, root_item->bytenr);
-        btrfs_set_super_chunk_root_generation(super, root_item->generation);
-        btrfs_set_super_chunk_root_level(super, root_item->level);
+        super->chunk_root = root_item->bytenr;
+        super->chunk_root_generation = root_item->generation;
+        super->chunk_root_level = root_item->level;
 
-        /* update latest btrfs_super_block::root refs */
         root_item = &fs_info->tree_root->root_item;
-        btrfs_set_super_root(super, root_item->bytenr);
-        btrfs_set_super_generation(super, root_item->generation);
-        btrfs_set_super_root_level(super, root_item->level);
-
+        super->root = root_item->bytenr;
+        super->generation = root_item->generation;
+        super->root_level = root_item->level;
         if (btrfs_test_opt(fs_info, SPACE_CACHE))
-                btrfs_set_super_cache_generation(super, root_item->generation);
+                super->cache_generation = root_item->generation;
         if (test_bit(BTRFS_FS_UPDATE_UUID_TREE_GEN, &fs_info->flags))
-                btrfs_set_super_uuid_tree_generation(super,
-                                                     root_item->generation);
+                super->uuid_tree_generation = root_item->generation;
 }
 
 int btrfs_transaction_in_commit(struct btrfs_fs_info *info)