diff options
| -rw-r--r-- | ctree.h | 15 | ||||
| -rw-r--r-- | print-tree.c | 46 |
2 files changed, 58 insertions, 3 deletions
@@ -71,6 +71,8 @@ struct btrfs_free_space_ctl; #define BTRFS_CSUM_TREE_OBJECTID 7ULL #define BTRFS_QUOTA_TREE_OBJECTID 8ULL +/* for storing items that use the BTRFS_UUID_KEY* */ +#define BTRFS_UUID_TREE_OBJECTID 9ULL /* for storing balance parameters in the root tree */ #define BTRFS_BALANCE_OBJECTID -4ULL @@ -1108,6 +1110,19 @@ struct btrfs_root { #define BTRFS_DEV_REPLACE_KEY 250 /* + * Stores items that allow to quickly map UUIDs to something else. + * These items are part of the filesystem UUID tree. + * The key is built like this: + * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits). + */ +#if BTRFS_UUID_SIZE != 16 +#error "UUID items require BTRFS_UUID_SIZE == 16!" +#endif +#define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */ +#define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to + * received subvols */ + +/* * string items are for debugging. They just store a short string of * data in the FS */ diff --git a/print-tree.c b/print-tree.c index 4401a1ab..761448d1 100644 --- a/print-tree.c +++ b/print-tree.c @@ -547,6 +547,12 @@ static void print_key_type(u64 objectid, u8 type) case BTRFS_DEV_STATS_KEY: printf("DEV_STATS_ITEM"); break; + case BTRFS_UUID_KEY_SUBVOL: + printf("BTRFS_UUID_KEY_SUBVOL"); + break; + case BTRFS_UUID_KEY_RECEIVED_SUBVOL: + printf("BTRFS_UUID_KEY_RECEIVED_SUBVOL"); + break; default: printf("UNKNOWN.%d", type); }; @@ -554,15 +560,18 @@ static void print_key_type(u64 objectid, u8 type) static void print_objectid(u64 objectid, u8 type) { - if (type == BTRFS_DEV_EXTENT_KEY) { + switch (type) { + case BTRFS_DEV_EXTENT_KEY: printf("%llu", (unsigned long long)objectid); /* device id */ return; - } - switch (type) { case BTRFS_QGROUP_RELATION_KEY: printf("%llu/%llu", objectid >> 48, objectid & ((1ll << 48) - 1)); return; + case BTRFS_UUID_KEY_SUBVOL: + case BTRFS_UUID_KEY_RECEIVED_SUBVOL: + printf("0x%016llx", (unsigned long long)objectid); + return; } switch (objectid) { @@ -620,6 +629,9 @@ static void print_objectid(u64 objectid, u8 type) case BTRFS_QUOTA_TREE_OBJECTID: printf("QUOTA_TREE"); break; + case BTRFS_UUID_TREE_OBJECTID: + printf("UUID_TREE"); + break; case BTRFS_MULTIPLE_OBJECTIDS: printf("MULTIPLE"); break; @@ -654,6 +666,10 @@ void btrfs_print_key(struct btrfs_disk_key *disk_key) printf(" %llu/%llu)", (unsigned long long)(offset >> 48), (unsigned long long)(offset & ((1ll << 48) - 1))); break; + case BTRFS_UUID_KEY_SUBVOL: + case BTRFS_UUID_KEY_RECEIVED_SUBVOL: + printf(" 0x%016llx)", (unsigned long long)offset); + break; default: if (offset == (u64)-1) printf(" -1)"); @@ -663,6 +679,25 @@ void btrfs_print_key(struct btrfs_disk_key *disk_key) } } +static void print_uuid_item(struct extent_buffer *l, unsigned long offset, + u32 item_size) +{ + if (item_size & (sizeof(u64) - 1)) { + printf("btrfs: uuid item with illegal size %lu!\n", + (unsigned long)item_size); + return; + } + while (item_size) { + u64 subvol_id; + + read_extent_buffer(l, &subvol_id, offset, sizeof(u64)); + subvol_id = le64_to_cpu(subvol_id); + printf("\t\tsubvol_id %llu\n", (unsigned long long)subvol_id); + item_size -= sizeof(u64); + offset += sizeof(u64); + } +} + void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l) { int i; @@ -879,6 +914,11 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l) (long long) btrfs_qgroup_limit_rsv_exclusive(l, qg_limit)); break; + case BTRFS_UUID_KEY_SUBVOL: + case BTRFS_UUID_KEY_RECEIVED_SUBVOL: + print_uuid_item(l, btrfs_item_ptr_offset(l, i), + btrfs_item_size_nr(l, i)); + break; case BTRFS_STRING_ITEM_KEY: /* dirty, but it's simple */ str = l->data + btrfs_item_ptr_offset(l, i); |