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OpenCloudOS-Kernel
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Btrfs: Add failure handling for read_sys_array 

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2008-04-25 09:04:37 -04:00
parent 004fb57506
commit 84eed90fac
2 changed files with 18 additions and 9 deletions
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11
fs/btrfs/disk-io.c
View File

@ -1278,7 +1278,11 @@ struct btrfs_root *open_ctree(struct super_block *sb,
mutex_lock(&fs_info->fs_mutex);
ret = btrfs_read_sys_array(tree_root);
BUG_ON(ret);
if (ret) {
printk("btrfs: failed to read the system array on %s\n",
sb->s_id);
goto fail_sys_array;
}
blocksize = btrfs_level_size(tree_root,
btrfs_super_chunk_root_level(disk_super));
@ -1335,8 +1339,9 @@ struct btrfs_root *open_ctree(struct super_block *sb,
fail_extent_root:
free_extent_buffer(extent_root->node);
fail_tree_root:
mutex_unlock(&fs_info->fs_mutex);
free_extent_buffer(tree_root->node);
fail_sys_array:
mutex_unlock(&fs_info->fs_mutex);
fail_sb_buffer:
free_extent_buffer(fs_info->sb_buffer);
extent_io_tree_empty_lru(&BTRFS_I(fs_info->btree_inode)->io_tree);
@ -1344,6 +1349,8 @@ fail_iput:
iput(fs_info->btree_inode);
fail:
close_all_devices(fs_info);
btrfs_mapping_tree_free(&fs_info->mapping_tree);
kfree(extent_root);
kfree(tree_root);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,23)

16
fs/btrfs/volumes.c
View File

@ -1365,14 +1365,14 @@ int btrfs_read_sys_array(struct btrfs_root *root)
struct extent_buffer *sb = root->fs_info->sb_buffer;
struct btrfs_disk_key *disk_key;
struct btrfs_chunk *chunk;
struct btrfs_key key;
u8 *ptr;
unsigned long sb_ptr;
int ret = 0;
u32 num_stripes;
u32 array_size;
u32 len = 0;
u8 *ptr;
unsigned long sb_ptr;
u32 cur;
int ret;
struct btrfs_key key;
array_size = btrfs_super_sys_array_size(super_copy);
@ -1397,17 +1397,19 @@ int btrfs_read_sys_array(struct btrfs_root *root)
if (key.type == BTRFS_CHUNK_ITEM_KEY) {
chunk = (struct btrfs_chunk *)sb_ptr;
ret = read_one_chunk(root, &key, sb, chunk);
BUG_ON(ret);
if (ret)
break;
num_stripes = btrfs_chunk_num_stripes(sb, chunk);
len = btrfs_chunk_item_size(num_stripes);
} else {
BUG();
ret = -EIO;
break;
}
ptr += len;
sb_ptr += len;
cur += len;
}
return 0;
return ret;
}
int btrfs_read_chunk_tree(struct btrfs_root *root)