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btrfs: sanitizing ->fs_info, part 3

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move assignments to ->fs_info in open_ctree() up, to the place
just after the original allocations.  Assignment for tree_root
becomes a no-op - we'd obtained fs_info from tree_root->fs_info
in the first place.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2011-11-17 00:38:54 -05:00
parent 1233f546ec
commit 38a77db49a
1 changed files with 5 additions and 7 deletions
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12
fs/btrfs/disk-io.c
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@ -1320,8 +1320,8 @@ struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root,
root = kzalloc(sizeof(*root), GFP_NOFS);
if (!root)
return ERR_PTR(-ENOMEM);
root->fs_info = fs_info;
if (location->offset == (u64)-1) {
root->fs_info = fs_info;
ret = find_and_setup_root(tree_root, fs_info,
location->objectid, root);
if (ret) {
@ -1331,7 +1331,6 @@ struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root,
goto out;
}
root->fs_info = fs_info;
__setup_root(tree_root->nodesize, tree_root->leafsize,
tree_root->sectorsize, tree_root->stripesize,
root, fs_info, location->objectid);
@ -1914,6 +1913,10 @@ struct btrfs_root *open_ctree(struct super_block *sb,
err = -ENOMEM;
goto fail;
}
chunk_root->fs_info = fs_info;
extent_root->fs_info = fs_info;
dev_root->fs_info = fs_info;
csum_root->fs_info = fs_info;
ret = init_srcu_struct(&fs_info->subvol_srcu);
if (ret) {
@ -2057,7 +2060,6 @@ struct btrfs_root *open_ctree(struct super_block *sb,
init_waitqueue_head(&fs_info->transaction_blocked_wait);
init_waitqueue_head(&fs_info->async_submit_wait);
tree_root->fs_info = fs_info;
__setup_root(4096, 4096, 4096, 4096, tree_root,
fs_info, BTRFS_ROOT_TREE_OBJECTID);
@ -2250,7 +2252,6 @@ struct btrfs_root *open_ctree(struct super_block *sb,
btrfs_super_chunk_root_level(disk_super));
generation = btrfs_super_chunk_root_generation(disk_super);
chunk_root->fs_info = fs_info;
__setup_root(nodesize, leafsize, sectorsize, stripesize,
chunk_root, fs_info, BTRFS_CHUNK_TREE_OBJECTID);
@ -2300,21 +2301,18 @@ retry_root_backup:
btrfs_set_root_node(&tree_root->root_item, tree_root->node);
tree_root->commit_root = btrfs_root_node(tree_root);
extent_root->fs_info = fs_info;
ret = find_and_setup_root(tree_root, fs_info,
BTRFS_EXTENT_TREE_OBJECTID, extent_root);
if (ret)
goto recovery_tree_root;
extent_root->track_dirty = 1;
dev_root->fs_info = fs_info;
ret = find_and_setup_root(tree_root, fs_info,
BTRFS_DEV_TREE_OBJECTID, dev_root);
if (ret)
goto recovery_tree_root;
dev_root->track_dirty = 1;
csum_root->fs_info = fs_info;
ret = find_and_setup_root(tree_root, fs_info,
BTRFS_CSUM_TREE_OBJECTID, csum_root);
if (ret)