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btrfs-progs: tune: rename new_fsid to fsid in set_metadata_uuid 

The %new_fsid is not only new it can be the fsid from the passed disk
so just rename it to %fsid. Also, in the next patch the %new_fsid will
be a bool variable to indicate if the %fsid is new from the fsid in the
disk.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Anand Jain 2023-08-14 23:28:00 +08:00 committed by David Sterba
parent 9e9ac97902
commit 21440a64f7
1 changed files with 9 additions and 9 deletions
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18
tune/change-metadata-uuid.c
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@ -27,7 +27,7 @@
int set_metadata_uuid(struct btrfs_root *root, const char *new_fsid_string)
{
struct btrfs_super_block *disk_super;
uuid_t new_fsid, unused1, unused2;
uuid_t fsid, unused1, unused2;
struct btrfs_trans_handle *trans;
bool new_uuid = true;
u64 incompat_flags;
@ -51,11 +51,11 @@ int set_metadata_uuid(struct btrfs_root *root, const char *new_fsid_string)
}
if (new_fsid_string)
uuid_parse(new_fsid_string, new_fsid);
uuid_parse(new_fsid_string, fsid);
else
uuid_generate(new_fsid);
uuid_generate(fsid);
new_uuid = (memcmp(new_fsid, disk_super->fsid, BTRFS_FSID_SIZE) != 0);
new_uuid = (memcmp(fsid, disk_super->fsid, BTRFS_FSID_SIZE) != 0);
/* Step 1 sets the in progress flag */
trans = btrfs_start_transaction(root, 1);
@ -66,23 +66,23 @@ int set_metadata_uuid(struct btrfs_root *root, const char *new_fsid_string)
return ret;
if (new_uuid && uuid_changed && memcmp(disk_super->metadata_uuid,
new_fsid, BTRFS_FSID_SIZE) == 0) {
fsid, BTRFS_FSID_SIZE) == 0) {
/*
* Changing fsid to be the same as metadata uuid, so just
* disable the flag
*/
memcpy(disk_super->fsid, &new_fsid, BTRFS_FSID_SIZE);
memcpy(disk_super->fsid, &fsid, BTRFS_FSID_SIZE);
incompat_flags &= ~BTRFS_FEATURE_INCOMPAT_METADATA_UUID;
btrfs_set_super_incompat_flags(disk_super, incompat_flags);
memset(disk_super->metadata_uuid, 0, BTRFS_FSID_SIZE);
} else if (new_uuid && uuid_changed && memcmp(disk_super->metadata_uuid,
new_fsid, BTRFS_FSID_SIZE)) {
fsid, BTRFS_FSID_SIZE)) {
/*
* Changing fsid on an already changed FS, in this case we
* only change the fsid and don't touch metadata uuid as it
* has already the correct value
*/
memcpy(disk_super->fsid, &new_fsid, BTRFS_FSID_SIZE);
memcpy(disk_super->fsid, &fsid, BTRFS_FSID_SIZE);
} else if (new_uuid && !uuid_changed) {
/*
* First time changing the fsid, copy the fsid to metadata_uuid
@ -91,7 +91,7 @@ int set_metadata_uuid(struct btrfs_root *root, const char *new_fsid_string)
btrfs_set_super_incompat_flags(disk_super, incompat_flags);
memcpy(disk_super->metadata_uuid, disk_super->fsid,
BTRFS_FSID_SIZE);
memcpy(disk_super->fsid, &new_fsid, BTRFS_FSID_SIZE);
memcpy(disk_super->fsid, &fsid, BTRFS_FSID_SIZE);
} else {
/* Setting the same fsid as current, do nothing */
return 0;