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authorQu Wenruo <quwenruo@cn.fujitsu.com>2015-05-11 16:08:45 +0800
committerDavid Sterba <dsterba@suse.cz>2015-05-14 15:41:07 +0200
commit2259f03439bd697b64efdb09dfc75638f24c4b48 (patch)
tree4eb36a6e415975ba4412a273c2f378fd508ae3f2 /disk-io.c
parent9ae2b8b52fe18efc0aab16ac3a5d1286a495b347 (diff)
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btrfs-progs: Add open_ctree check for uuid changing
Now open_ctree will exit if it found the superblock is marked CHANGING_FSID, except given IGNORE_FSID open ctree flags. Kernel will do the same thing later. Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com> [removed the chunk tree flag, reworded the error message] Signed-off-by: David Sterba <dsterba@suse.cz>
Diffstat (limited to 'disk-io.c')
-rw-r--r--disk-io.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/disk-io.c b/disk-io.c
index c1cf146..3daed3b 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_mismatch ||
+ !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_MISMATCH)
+ fs_info->ignore_fsid_mismatch = 1;
ret = btrfs_scan_fs_devices(fp, path, &fs_devices, sb_bytenr,
(flags & OPEN_CTREE_RECOVER_SUPER),
@@ -1180,6 +1183,12 @@ static struct btrfs_fs_info *__open_ctree_fd(int fp, const char *path,
goto out_devices;
}
+ if (btrfs_super_flags(disk_super) & BTRFS_SUPER_FLAG_CHANGING_FSID &&
+ !fs_info->ignore_fsid_mismatch) {
+ fprintf(stderr, "ERROR: Filesystem UUID change in progress\n");
+ goto out_devices;
+ }
+
memcpy(fs_info->fsid, &disk_super->fsid, BTRFS_FSID_SIZE);
ret = btrfs_check_fs_compatibility(fs_info->super_copy,