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btrfs-progs: fix csum root copy-n-paste error

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btrfs_setup_all_roots() had some copy and pasted code for trying to
setup a root and then creating a blank node if that failed.  The copy
for the csum_root created the blank node in the extent_root.

So we create a function to use a consistent root.

Signed-off-by: Zach Brown <zab@zabbo.net>
Signed-off-by: David Sterba <dsterba@suse.cz>
This commit is contained in:
Zach Brown 2014-10-15 16:14:21 -07:00 committed by David Sterba
parent 85d67ac145
commit 34ed841dcd
1 changed files with 37 additions and 30 deletions
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67
disk-io.c
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@ -834,6 +834,35 @@ static int find_best_backup_root(struct btrfs_super_block *super)
return best_index;
}
static int setup_root_or_create_block(struct btrfs_fs_info *fs_info,
enum btrfs_open_ctree_flags flags,
struct btrfs_root *info_root,
u64 objectid, char *str)
{
struct btrfs_super_block *sb = fs_info->super_copy;
struct btrfs_root *root = fs_info->tree_root;
u32 leafsize = btrfs_super_leafsize(sb);
int ret;
ret = find_and_setup_root(root, fs_info, objectid, info_root);
if (ret) {
printk("Couldn't setup %s tree\n", str);
if (!(flags & OPEN_CTREE_PARTIAL))
return -EIO;
/*
* Need a blank node here just so we don't screw up in the
* million of places that assume a root has a valid ->node
*/
info_root->node =
btrfs_find_create_tree_block(info_root, 0, leafsize);
if (!info_root->node)
return -ENOMEM;
clear_extent_buffer_uptodate(NULL, info_root->node);
}
return 0;
}
int btrfs_setup_all_roots(struct btrfs_fs_info *fs_info, u64 root_tree_bytenr,
enum btrfs_open_ctree_flags flags)
{
@ -880,22 +909,10 @@ int btrfs_setup_all_roots(struct btrfs_fs_info *fs_info, u64 root_tree_bytenr,
return -EIO;
}
ret = find_and_setup_root(root, fs_info, BTRFS_EXTENT_TREE_OBJECTID,
fs_info->extent_root);
if (ret) {
printk("Couldn't setup extent tree\n");
if (!(flags & OPEN_CTREE_PARTIAL))
return -EIO;
/* Need a blank node here just so we don't screw up in the
* million of places that assume a root has a valid ->node
*/
fs_info->extent_root->node =
btrfs_find_create_tree_block(fs_info->extent_root, 0,
leafsize);
if (!fs_info->extent_root->node)
return -ENOMEM;
clear_extent_buffer_uptodate(NULL, fs_info->extent_root->node);
}
ret = setup_root_or_create_block(fs_info, flags, fs_info->extent_root,
BTRFS_EXTENT_TREE_OBJECTID, "extent");
if (ret)
return ret;
fs_info->extent_root->track_dirty = 1;
ret = find_and_setup_root(root, fs_info, BTRFS_DEV_TREE_OBJECTID,
@ -906,20 +923,10 @@ int btrfs_setup_all_roots(struct btrfs_fs_info *fs_info, u64 root_tree_bytenr,
}
fs_info->dev_root->track_dirty = 1;
ret = find_and_setup_root(root, fs_info, BTRFS_CSUM_TREE_OBJECTID,
fs_info->csum_root);
if (ret) {
printk("Couldn't setup csum tree\n");
if (!(flags & OPEN_CTREE_PARTIAL))
return -EIO;
/* do the same thing as extent tree rebuilding */
fs_info->csum_root->node =
btrfs_find_create_tree_block(fs_info->extent_root, 0,
leafsize);
if (!fs_info->csum_root->node)
return -ENOMEM;
clear_extent_buffer_uptodate(NULL, fs_info->csum_root->node);
}
ret = setup_root_or_create_block(fs_info, flags, fs_info->csum_root,
BTRFS_CSUM_TREE_OBJECTID, "csum");
if (ret)
return ret;
fs_info->csum_root->track_dirty = 1;
ret = find_and_setup_root(root, fs_info, BTRFS_QUOTA_TREE_OBJECTID,