fs: btrfs: Crossport open_ctree_fs_info() from btrfs-progs
open_ctree_fs_info() is the main entry point to open btrfs.
This version is a simplfied version of __open_ctree_fd() of btrfs-progs,
the main differences are:
- Parameters on how to specify a block device
Instead of @fd and @path, U-Boot uses blk_desc and disk_partition_t.
- Remove open_ctree flags
There won't be multiple open ctree modes in U-Boot.
Otherwise functions structures are all kept the same.
With open_ctree_fs_info() implemented, also introduce the global
current_fs_info pointer to show the current opened btrfs.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Marek Behún <marek.behun@nic.cz>
diff --git a/fs/btrfs/compat.h b/fs/btrfs/compat.h
index be4f4e7..52de9db 100644
--- a/fs/btrfs/compat.h
+++ b/fs/btrfs/compat.h
@@ -12,6 +12,8 @@
/* A simple wraper to for error() used in btrfs-progs */
#define error(fmt, ...) pr_err("BTRFS: " fmt "\n", ##__VA_ARGS__)
+#define ASSERT(c) assert(c)
+
#define BTRFS_UUID_UNPARSED_SIZE 37
/*