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btrfs-progs: btrfstune: rework option handling 

Simplify the code, gather the incompat flag bits and set them at once.

Signed-off-by: David Sterba <dsterba@suse.cz>
master
David Sterba 2015-06-02 18:24:33 +02:00
parent d020af5235
commit c476696b82
1 changed files with 16 additions and 37 deletions
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53
btrfstune.c
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@ -40,6 +40,7 @@ static int update_seeding_flag(struct btrfs_root *root, int set_flag)
struct btrfs_trans_handle *trans;
struct btrfs_super_block *disk_super;
u64 super_flags;
int ret;
disk_super = root->fs_info->super_copy;
super_flags = btrfs_super_flags(disk_super);
@ -64,41 +65,26 @@ static int update_seeding_flag(struct btrfs_root *root, int set_flag)
trans = btrfs_start_transaction(root, 1);
btrfs_set_super_flags(disk_super, super_flags);
btrfs_commit_transaction(trans, root);
ret = btrfs_commit_transaction(trans, root);
return 0;
return ret;
}
static int enable_extrefs_flag(struct btrfs_root *root)
static int set_super_incompat_flags(struct btrfs_root *root, u64 flags)
{
struct btrfs_trans_handle *trans;
struct btrfs_super_block *disk_super;
u64 super_flags;
int ret;
disk_super = root->fs_info->super_copy;
super_flags = btrfs_super_incompat_flags(disk_super);
super_flags |= BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF;
super_flags |= flags;
trans = btrfs_start_transaction(root, 1);
btrfs_set_super_incompat_flags(disk_super, super_flags);
btrfs_commit_transaction(trans, root);
ret = btrfs_commit_transaction(trans, root);
return 0;
}
static int enable_skinny_metadata(struct btrfs_root *root)
{
struct btrfs_trans_handle *trans;
struct btrfs_super_block *disk_super;
u64 super_flags;
disk_super = root->fs_info->super_copy;
super_flags = btrfs_super_incompat_flags(disk_super);
super_flags |= BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA;
trans = btrfs_start_transaction(root, 1);
btrfs_set_super_incompat_flags(disk_super, super_flags);
btrfs_commit_transaction(trans, root);
return 0;
return ret;
}
static int change_header_uuid(struct btrfs_root *root, struct extent_buffer *eb)
@ -417,13 +403,12 @@ int main(int argc, char *argv[])
enum btrfs_open_ctree_flags ctree_flags = OPEN_CTREE_WRITES;
int success = 0;
int total = 0;
int extrefs_flag = 0;
int seeding_flag = 0;
u64 seeding_value = 0;
int skinny_flag = 0;
int random_fsid = 0;
char *new_fsid_str = NULL;
int ret;
u64 super_flags = 0;
optind = 1;
while(1) {
@ -436,10 +421,10 @@ int main(int argc, char *argv[])
seeding_value = arg_strtou64(optarg);
break;
case 'r':
extrefs_flag = 1;
super_flags |= BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF;
break;
case 'x':
skinny_flag = 1;
super_flags |= BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA;
break;
case 'f':
force = 1;
@ -471,8 +456,7 @@ int main(int argc, char *argv[])
"ERROR: Random fsid can't be used with specified fsid\n");
return 1;
}
if (!(seeding_flag + extrefs_flag + skinny_flag) &&
!(random_fsid || new_fsid_str)) {
if (!super_flags && !seeding_flag && !(random_fsid || new_fsid_str)) {
fprintf(stderr,
"ERROR: At least one option should be assigned.\n");
print_usage();
@ -531,15 +515,10 @@ int main(int argc, char *argv[])
total++;
}
if (extrefs_flag) {
enable_extrefs_flag(root);
success++;
total++;
}
if (skinny_flag) {
enable_skinny_metadata(root);
success++;
if (super_flags) {
ret = set_super_incompat_flags(root, super_flags);
if (!ret)
success++;
total++;
}