diff options
author | Andy Green <andy.green@linaro.org> | 2011-04-15 09:29:22 +0100 |
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committer | Andy Green <andy.green@linaro.org> | 2011-04-15 09:29:22 +0100 |
commit | caa70ccf8cc719acb0540b558b4e075796778db8 (patch) | |
tree | e8173307b04eca62168415be04e7800bdf011f80 /fs/btrfs/root-tree.c | |
parent | 56d667f87e81d15d43f264007322f1179ce1722e (diff) | |
parent | 3ec10cd8b526c6b10170c2649002672ee2019e73 (diff) |
Merge branch 'linux-linaro-2.6.38-master' into for-ubuntuu2
Diffstat (limited to 'fs/btrfs/root-tree.c')
-rw-r--r-- | fs/btrfs/root-tree.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/fs/btrfs/root-tree.c b/fs/btrfs/root-tree.c index 6a1086e83ff..3e45c3206e7 100644 --- a/fs/btrfs/root-tree.c +++ b/fs/btrfs/root-tree.c @@ -471,3 +471,21 @@ again: btrfs_free_path(path); return 0; } + +/* + * Old btrfs forgets to init root_item->flags and root_item->byte_limit + * for subvolumes. To work around this problem, we steal a bit from + * root_item->inode_item->flags, and use it to indicate if those fields + * have been properly initialized. + */ +void btrfs_check_and_init_root_item(struct btrfs_root_item *root_item) +{ + u64 inode_flags = le64_to_cpu(root_item->inode.flags); + + if (!(inode_flags & BTRFS_INODE_ROOT_ITEM_INIT)) { + inode_flags |= BTRFS_INODE_ROOT_ITEM_INIT; + root_item->inode.flags = cpu_to_le64(inode_flags); + root_item->flags = 0; + root_item->byte_limit = 0; + } +} |