diff options
Diffstat (limited to 'include/uapi/linux/btrfs_tree.h')
| -rw-r--r-- | include/uapi/linux/btrfs_tree.h | 64 |
1 files changed, 63 insertions, 1 deletions
diff --git a/include/uapi/linux/btrfs_tree.h b/include/uapi/linux/btrfs_tree.h index fc3c32186d7e..fc29d273845d 100644 --- a/include/uapi/linux/btrfs_tree.h +++ b/include/uapi/linux/btrfs_tree.h @@ -73,6 +73,9 @@ /* Holds the block group items for extent tree v2. */ #define BTRFS_BLOCK_GROUP_TREE_OBJECTID 11ULL +/* Tracks RAID stripes in block groups. */ +#define BTRFS_RAID_STRIPE_TREE_OBJECTID 12ULL + /* device stats in the device tree */ #define BTRFS_DEV_STATS_OBJECTID 0ULL @@ -216,6 +219,22 @@ */ #define BTRFS_METADATA_ITEM_KEY 169 +/* + * Special inline ref key which stores the id of the subvolume which originally + * created the extent. This subvolume owns the extent permanently from the + * perspective of simple quotas. Needed to know which subvolume to free quota + * usage from when the extent is deleted. + * + * Stored as an inline ref rather to avoid wasting space on a separate item on + * top of the existing extent item. However, unlike the other inline refs, + * there is one one owner ref per extent rather than one per extent. + * + * Because of this, it goes at the front of the list of inline refs, and thus + * must have a lower type value than any other inline ref type (to satisfy the + * disk format rule that inline refs have non-decreasing type). + */ +#define BTRFS_EXTENT_OWNER_REF_KEY 172 + #define BTRFS_TREE_BLOCK_REF_KEY 176 #define BTRFS_EXTENT_DATA_REF_KEY 178 @@ -261,6 +280,8 @@ #define BTRFS_DEV_ITEM_KEY 216 #define BTRFS_CHUNK_ITEM_KEY 228 +#define BTRFS_RAID_STRIPE_KEY 230 + /* * Records the overall state of the qgroups. * There's only one instance of this key present, @@ -719,6 +740,18 @@ struct btrfs_free_space_header { __le64 num_bitmaps; } __attribute__ ((__packed__)); +struct btrfs_raid_stride { + /* The id of device this raid extent lives on. */ + __le64 devid; + /* The physical location on disk. */ + __le64 physical; +} __attribute__ ((__packed__)); + +struct btrfs_stripe_extent { + /* An array of raid strides this stripe is composed of. */ + __DECLARE_FLEX_ARRAY(struct btrfs_raid_stride, strides); +} __attribute__ ((__packed__)); + #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0) #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1) @@ -732,6 +765,14 @@ struct btrfs_free_space_header { #define BTRFS_SUPER_FLAG_CHANGING_FSID (1ULL << 35) #define BTRFS_SUPER_FLAG_CHANGING_FSID_V2 (1ULL << 36) +/* + * Those are temporaray flags utilized by btrfs-progs to do offline conversion. + * They are rejected by kernel. + * But still keep them all here to avoid conflicts. + */ +#define BTRFS_SUPER_FLAG_CHANGING_BG_TREE (1ULL << 38) +#define BTRFS_SUPER_FLAG_CHANGING_DATA_CSUM (1ULL << 39) +#define BTRFS_SUPER_FLAG_CHANGING_META_CSUM (1ULL << 40) /* * items in the extent btree are used to record the objectid of the @@ -787,6 +828,10 @@ struct btrfs_shared_data_ref { __le32 count; } __attribute__ ((__packed__)); +struct btrfs_extent_owner_ref { + __le64 root_id; +} __attribute__ ((__packed__)); + struct btrfs_extent_inline_ref { __u8 type; __le64 offset; @@ -1204,9 +1249,17 @@ static inline __u16 btrfs_qgroup_level(__u64 qgroupid) */ #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2) +/* + * Whether or not this filesystem is using simple quotas. Not exactly the + * incompat bit, because we support using simple quotas, disabling it, then + * going back to full qgroup quotas. + */ +#define BTRFS_QGROUP_STATUS_FLAG_SIMPLE_MODE (1ULL << 3) + #define BTRFS_QGROUP_STATUS_FLAGS_MASK (BTRFS_QGROUP_STATUS_FLAG_ON | \ BTRFS_QGROUP_STATUS_FLAG_RESCAN | \ - BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT) + BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT | \ + BTRFS_QGROUP_STATUS_FLAG_SIMPLE_MODE) #define BTRFS_QGROUP_STATUS_VERSION 1 @@ -1228,6 +1281,15 @@ struct btrfs_qgroup_status_item { * of the scan. It contains a logical address */ __le64 rescan; + + /* + * The generation when quotas were last enabled. Used by simple quotas to + * avoid decrementing when freeing an extent that was written before + * enable. + * + * Set only if flags contain BTRFS_QGROUP_STATUS_FLAG_SIMPLE_MODE. + */ + __le64 enable_gen; } __attribute__ ((__packed__)); struct btrfs_qgroup_info_item { |