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btrfs: switch to use new generic UUID API

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There are new types and helpers that are supposed to be used in new code.

As a preparation to get rid of legacy types and API functions do
the conversion here.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Andy Shevchenko 2020-02-24 17:37:51 +02:00 committed by David Sterba
parent 48a2e88f53
commit 807fc790aa
4 changed files with 8 additions and 13 deletions
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6
fs/btrfs/disk-io.c
View File

@ -1223,7 +1223,6 @@ struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans,
struct btrfs_key key;
unsigned int nofs_flag;
int ret = 0;
uuid_le uuid = NULL_UUID_LE;
/*
* We're holding a transaction handle, so use a NOFS memory allocation
@ -1262,8 +1261,9 @@ struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans,
btrfs_set_root_last_snapshot(&root->root_item, 0);
btrfs_set_root_dirid(&root->root_item, 0);
if (is_fstree(objectid))
uuid_le_gen(&uuid);
memcpy(root->root_item.uuid, uuid.b, BTRFS_UUID_SIZE);
generate_random_guid(root->root_item.uuid);
else
export_guid(root->root_item.uuid, &guid_null);
root->root_item.drop_level = 0;
key.objectid = objectid;

4
fs/btrfs/ioctl.c
View File

@ -574,7 +574,6 @@ static noinline int create_subvol(struct inode *dir,
u64 objectid;
u64 new_dirid = BTRFS_FIRST_FREE_OBJECTID;
u64 index = 0;
uuid_le new_uuid;
root_item = kzalloc(sizeof(*root_item), GFP_KERNEL);
if (!root_item)
@ -644,8 +643,7 @@ static noinline int create_subvol(struct inode *dir,
btrfs_set_root_generation_v2(root_item,
btrfs_root_generation(root_item));
uuid_le_gen(&new_uuid);
memcpy(root_item->uuid, new_uuid.b, BTRFS_UUID_SIZE);
generate_random_guid(root_item->uuid);
btrfs_set_stack_timespec_sec(&root_item->otime, cur_time.tv_sec);
btrfs_set_stack_timespec_nsec(&root_item->otime, cur_time.tv_nsec);
root_item->ctime = root_item->otime;

4
fs/btrfs/root-tree.c
View File

@ -22,7 +22,6 @@
static void btrfs_read_root_item(struct extent_buffer *eb, int slot,
struct btrfs_root_item *item)
{
uuid_le uuid;
u32 len;
int need_reset = 0;
@ -44,8 +43,7 @@ static void btrfs_read_root_item(struct extent_buffer *eb, int slot,
sizeof(*item) - offsetof(struct btrfs_root_item,
generation_v2));
uuid_le_gen(&uuid);
memcpy(item->uuid, uuid.b, BTRFS_UUID_SIZE);
generate_random_guid(item->uuid);
}
}

7
fs/btrfs/transaction.c
View File

@ -1479,7 +1479,6 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
u64 index = 0;
u64 objectid;
u64 root_flags;
uuid_le new_uuid;
ASSERT(pending->path);
path = pending->path;
@ -1572,8 +1571,7 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
btrfs_set_root_generation_v2(new_root_item,
trans->transid);
uuid_le_gen(&new_uuid);
memcpy(new_root_item->uuid, new_uuid.b, BTRFS_UUID_SIZE);
generate_random_guid(new_root_item->uuid);
memcpy(new_root_item->parent_uuid, root->root_item.uuid,
BTRFS_UUID_SIZE);
if (!(root_flags & BTRFS_ROOT_SUBVOL_RDONLY)) {
@ -1684,7 +1682,8 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
btrfs_abort_transaction(trans, ret);
goto fail;
}
ret = btrfs_uuid_tree_add(trans, new_uuid.b, BTRFS_UUID_KEY_SUBVOL,
ret = btrfs_uuid_tree_add(trans, new_root_item->uuid,
BTRFS_UUID_KEY_SUBVOL,
objectid);
if (ret) {
btrfs_abort_transaction(trans, ret);