This feature is used for later UUID change function.
Signed-off-by: Qu Wenruo <quwenruo@xxxxxxxxxxxxxx>
---
ctree.h | 1 +
disk-io.c | 5 ++++-
disk-io.h | 3 +++
3 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/ctree.h b/ctree.h
index 10dc838..45fef3d 100644
--- a/ctree.h
+++ b/ctree.h
@@ -1010,6 +1010,7 @@ struct btrfs_fs_info {
unsigned int is_chunk_recover:1;
unsigned int quota_enabled:1;
unsigned int suppress_check_block_errors:1;
+ unsigned int ignore_fsid:1;
int (*free_extent_hook)(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
diff --git a/disk-io.c b/disk-io.c
index c1cf146..8a91345 100644
--- a/disk-io.c
+++ b/disk-io.c
@@ -49,7 +49,8 @@ static int check_tree_block(struct btrfs_root *root, struct extent_buffer *buf)
fs_devices = root->fs_info->fs_devices;
while (fs_devices) {
- if (!memcmp_extent_buffer(buf, fs_devices->fsid,
+ if (root->fs_info->ignore_fsid ||
+ !memcmp_extent_buffer(buf, fs_devices->fsid,
btrfs_header_fsid(),
BTRFS_FSID_SIZE)) {
ret = 0;
@@ -1149,6 +1150,8 @@ static struct btrfs_fs_info *__open_ctree_fd(int fp, const char *path,
fs_info->on_restoring = 1;
if (flags & OPEN_CTREE_SUPPRESS_CHECK_BLOCK_ERRORS)
fs_info->suppress_check_block_errors = 1;
+ if (flags & OPEN_CTREE_IGNORE_FSID)
+ fs_info->ignore_fsid = 1;
ret = btrfs_scan_fs_devices(fp, path, &fs_devices, sb_bytenr,
(flags & OPEN_CTREE_RECOVER_SUPER),
diff --git a/disk-io.h b/disk-io.h
index 4caebeb..83cbe47 100644
--- a/disk-io.h
+++ b/disk-io.h
@@ -49,6 +49,9 @@ enum btrfs_open_ctree_flags {
* tree bits.
* Like split PARTIAL into SKIP_CSUM/SKIP_EXTENT
*/
+
+ /* Currently, no codes check chunk_tree_uuid, so only ignore fsid */
+ OPEN_CTREE_IGNORE_FSID = (1 << 10)
};
static inline u64 btrfs_sb_offset(int mirror)
--
2.3.7
--
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