7 #include <linux/uuid.h>
15 #include "uuid-tree.h"
18 static void btrfs_uuid_to_key(const u8 *uuid, u8 type, struct btrfs_key *key)  in btrfs_uuid_to_key()  argument
21 	key->objectid = get_unaligned_le64(uuid);  in btrfs_uuid_to_key()
22 	key->offset = get_unaligned_le64(uuid + sizeof(u64));  in btrfs_uuid_to_key()
26 static int btrfs_uuid_tree_lookup(struct btrfs_root *uuid_root, const u8 *uuid,  in btrfs_uuid_tree_lookup()  argument
44 	btrfs_uuid_to_key(uuid, type, &key);  in btrfs_uuid_tree_lookup()
59 			   "uuid item with illegal size %lu!",  in btrfs_uuid_tree_lookup()
78 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, const u8 *uuid, u8 type,  in btrfs_uuid_tree_add()  argument
91 	ret = btrfs_uuid_tree_lookup(uuid_root, uuid, type, subid_cpu);  in btrfs_uuid_tree_add()
95 	btrfs_uuid_to_key(uuid, type, &key);  in btrfs_uuid_tree_add()
120 			   "insert uuid item failed %d (0x%016llx, 0x%016llx) type %u!",  in btrfs_uuid_tree_add()
130 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, const u8 *uuid, u8 type,  in btrfs_uuid_tree_remove()  argument
149 	btrfs_uuid_to_key(uuid, type, &key);  in btrfs_uuid_tree_remove()
157 		btrfs_warn(fs_info, "error %d while searching for uuid item!",  in btrfs_uuid_tree_remove()
169 		btrfs_warn(fs_info, "uuid item with illegal size %lu!",  in btrfs_uuid_tree_remove()
200  * Check if we can add one root ID to a UUID key.
207 				   const u8 *uuid, u8 type)  in btrfs_uuid_tree_check_overflow()  argument
221 	btrfs_uuid_to_key(uuid, type, &key);  in btrfs_uuid_tree_check_overflow()
237 static int btrfs_uuid_iter_rem(struct btrfs_root *uuid_root, u8 *uuid, u8 type,  in btrfs_uuid_iter_rem()  argument
243 	/* 1 - for the uuid item */  in btrfs_uuid_iter_rem()
248 	ret = btrfs_uuid_tree_remove(trans, uuid, type, subid);  in btrfs_uuid_iter_rem()
254  * Check if there's an matching subvolume for given UUID
262 				       const u8 *uuid, u8 type, u64 subvolid)  in btrfs_check_uuid_tree_entry()  argument
281 		if (memcmp(uuid, subvol_root->root_item.uuid, BTRFS_UUID_SIZE))  in btrfs_check_uuid_tree_entry()
285 		if (memcmp(uuid, subvol_root->root_item.received_uuid,  in btrfs_check_uuid_tree_entry()
338 				   "uuid item with illegal size %lu!",  in btrfs_uuid_tree_iterate()
343 			u8 uuid[BTRFS_UUID_SIZE];  in btrfs_uuid_tree_iterate()  local
347 			put_unaligned_le64(key.objectid, uuid);  in btrfs_uuid_tree_iterate()
348 			put_unaligned_le64(key.offset, uuid + sizeof(u64));  in btrfs_uuid_tree_iterate()
352 			ret = btrfs_check_uuid_tree_entry(fs_info, uuid,  in btrfs_uuid_tree_iterate()
358 				ret = btrfs_uuid_iter_rem(root, uuid, key.type,  in btrfs_uuid_tree_iterate()
366 					 * entry per UUID exists.  in btrfs_uuid_tree_iterate()
446 		if (!btrfs_is_empty_uuid(root_item.uuid) ||  in btrfs_uuid_scan_kthread()
453 			 * 1 - subvol uuid item  in btrfs_uuid_scan_kthread()
454 			 * 1 - received_subvol uuid item  in btrfs_uuid_scan_kthread()
467 		if (!btrfs_is_empty_uuid(root_item.uuid)) {  in btrfs_uuid_scan_kthread()
468 			ret = btrfs_uuid_tree_add(trans, root_item.uuid,  in btrfs_uuid_scan_kthread()
557 	task = kthread_run(btrfs_uuid_scan_kthread, fs_info, "btrfs-uuid");  in btrfs_create_uuid_tree()