Btrfs: convert the inode bit field to use the actual bit operations

[firefly-linux-kernel-4.4.55.git] / fs / btrfs / disk-io.c

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index d0c969beaad4d30a52e13ebb74d3f4fcefa9fece..0cf8ef2b5b1ab6584a42e6921826ac95455916f9 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -323,7 +323,8 @@ static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf,
  * in the wrong place.
  */
 static int verify_parent_transid(struct extent_io_tree *io_tree,
-                                struct extent_buffer *eb, u64 parent_transid)
+                                struct extent_buffer *eb, u64 parent_transid,
+                                int atomic)
 {
        struct extent_state *cached_state = NULL;
        int ret;
@@ -331,6 +332,9 @@ static int verify_parent_transid(struct extent_io_tree *io_tree,
        if (!parent_transid || btrfs_header_generation(eb) == parent_transid)
                return 0;
 
+       if (atomic)
+               return -EAGAIN;
+
        lock_extent_bits(io_tree, eb->start, eb->start + eb->len - 1,
                         0, &cached_state);
        if (extent_buffer_uptodate(eb) &&
@@ -372,7 +376,8 @@ static int btree_read_extent_buffer_pages(struct btrfs_root *root,
                ret = read_extent_buffer_pages(io_tree, eb, start,
                                               WAIT_COMPLETE,
                                               btree_get_extent, mirror_num);
-               if (!ret && !verify_parent_transid(io_tree, eb, parent_transid))
+               if (!ret && !verify_parent_transid(io_tree, eb,
+                                                  parent_transid, 0))
                        break;
 
                /*
@@ -1202,7 +1207,7 @@ static int __must_check find_and_setup_root(struct btrfs_root *tree_root,
        root->commit_root = NULL;
        root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item),
                                     blocksize, generation);
-       if (!root->node || !btrfs_buffer_uptodate(root->node, generation)) {
+       if (!root->node || !btrfs_buffer_uptodate(root->node, generation, 0)) {
                free_extent_buffer(root->node);
                root->node = NULL;
                return -EIO;
@@ -1996,7 +2001,8 @@ int open_ctree(struct super_block *sb,
        BTRFS_I(fs_info->btree_inode)->root = tree_root;
        memset(&BTRFS_I(fs_info->btree_inode)->location, 0,
               sizeof(struct btrfs_key));
-       BTRFS_I(fs_info->btree_inode)->dummy_inode = 1;
+       set_bit(BTRFS_INODE_DUMMY,
+               &BTRFS_I(fs_info->btree_inode)->runtime_flags);
        insert_inode_hash(fs_info->btree_inode);
 
        spin_lock_init(&fs_info->block_group_cache_lock);
@@ -3143,7 +3149,8 @@ int close_ctree(struct btrfs_root *root)
        return 0;
 }
 
-int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid)
+int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid,
+                         int atomic)
 {
        int ret;
        struct inode *btree_inode = buf->pages[0]->mapping->host;
@@ -3153,7 +3160,9 @@ int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid)
                return ret;
 
        ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf,
-                                   parent_transid);
+                                   parent_transid, atomic);
+       if (ret == -EAGAIN)
+               return ret;
        return !ret;
 }
 
@@ -3663,17 +3672,6 @@ int btrfs_cleanup_transaction(struct btrfs_root *root)
        return 0;
 }
 
-static int btree_writepage_io_failed_hook(struct bio *bio, struct page *page,
-                                         u64 start, u64 end,
-                                         struct extent_state *state)
-{
-       struct super_block *sb = page->mapping->host->i_sb;
-       struct btrfs_fs_info *fs_info = btrfs_sb(sb);
-       btrfs_error(fs_info, -EIO,
-                   "Error occured while writing out btree at %llu", start);
-       return -EIO;
-}
-
 static struct extent_io_ops btree_extent_io_ops = {
        .write_cache_pages_lock_hook = btree_lock_page_hook,
        .readpage_end_io_hook = btree_readpage_end_io_hook,
@@ -3681,5 +3679,4 @@ static struct extent_io_ops btree_extent_io_ops = {
        .submit_bio_hook = btree_submit_bio_hook,
        /* note we're sharing with inode.c for the merge bio hook */
        .merge_bio_hook = btrfs_merge_bio_hook,
-       .writepage_io_failed_hook = btree_writepage_io_failed_hook,
 };