/* for storing items that use the BTRFS_UUID_KEY* */
#define BTRFS_UUID_TREE_OBJECTID 9ULL
+/* tracks free space in block groups. */
+#define BTRFS_FREE_SPACE_TREE_OBJECTID 10ULL
+
/* for storing balance parameters in the root tree */
#define BTRFS_BALANCE_OBJECTID -4ULL
/* csum types */
#define BTRFS_CSUM_TYPE_CRC32 0
-static int btrfs_csum_sizes[] = { 4, 0 };
+static int btrfs_csum_sizes[] = { 4 };
/* four bytes for CRC32 */
#define BTRFS_CRC32_SIZE 4
/*
* the key defines the order in the tree, and so it also defines (optimal)
- * block layout. objectid corresonds to the inode number. The flags
+ * block layout. objectid corresponds to the inode number. The flags
* tells us things about the object, and is a kind of stream selector.
* so for a given inode, keys with flags of 1 might refer to the inode
* data, flags of 2 may point to file data in the btree and flags == 3
/*
* starting byte of this partition on the device,
- * to allowr for stripe alignment in the future
+ * to allow for stripe alignment in the future
*/
__le64 start_offset;
#define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
#define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
#define BTRFS_SUPER_FLAG_METADUMP_V2 (1ULL << 34)
+#define BTRFS_SUPER_FLAG_CHANGING_FSID (1ULL << 35)
#define BTRFS_BACKREF_REV_MAX 256
#define BTRFS_BACKREF_REV_SHIFT 56
sizeof(struct btrfs_header)) / \
sizeof(struct btrfs_key_ptr))
#define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
-#define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
+#define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->nodesize))
#define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
sizeof(struct btrfs_item) - \
sizeof(struct btrfs_file_extent_item))
__le64 num_devices;
__le32 sectorsize;
__le32 nodesize;
+ /* Unused and must be equal to nodesize */
__le32 leafsize;
__le32 stripesize;
__le32 sys_chunk_array_size;
* Compat flags that we support. If any incompat flags are set other than the
* ones specified below then we will fail to mount
*/
+#define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0)
+
#define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
#define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
#define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
#define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
#define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
-
#define BTRFS_FEATURE_COMPAT_SUPP 0ULL
-#define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
+
+#define BTRFS_FEATURE_COMPAT_RO_SUPP \
+ (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE)
+
#define BTRFS_FEATURE_INCOMPAT_SUPP \
(BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
#define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
sizeof(struct btrfs_item))
+#define BTRFS_MAX_EXTENT_SIZE (128 * 1024 * 1024)
#define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
#define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
/*
* This generation number is used to test if the new fields are valid
- * and up to date while reading the root item. Everytime the root item
+ * and up to date while reading the root item. Every time the root item
* is written out, the "generation" field is copied into this field. If
* anyone ever mounted the fs with an older kernel, we will have
* mismatching generation values here and thus must invalidate the
__le64 flags;
} __attribute__ ((__packed__));
+struct btrfs_free_space_info {
+ __le32 extent_count;
+ __le32 flags;
+} __attribute__ ((__packed__));
+
+#define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
+
struct btrfs_qgroup_info_item {
__le64 generation;
__le64 referenced;
struct btrfs_block_group_item item;
struct btrfs_space_info *space_info;
struct btrfs_free_space_ctl *free_space_ctl;
+ u64 bytes_super;
u64 pinned;
u64 flags;
int cached;
int ro;
};
-struct btrfs_extent_ops {
- int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes,
- u64 hint_byte, struct btrfs_key *ins);
- int (*free_extent)(struct btrfs_root *root, u64 bytenr,
- u64 num_bytes);
-};
-
struct btrfs_device;
struct btrfs_fs_devices;
struct btrfs_fs_info {
u8 fsid[BTRFS_FSID_SIZE];
+ u8 *new_fsid;
u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
+ u8 *new_chunk_tree_uuid;
struct btrfs_root *fs_root;
struct btrfs_root *extent_root;
struct btrfs_root *tree_root;
struct btrfs_root *dev_root;
struct btrfs_root *csum_root;
struct btrfs_root *quota_root;
+ struct btrfs_root *free_space_root;
struct rb_root fs_root_tree;
u64 super_bytenr;
u64 total_pinned;
- struct btrfs_extent_ops *extent_ops;
struct list_head dirty_cowonly_roots;
struct list_head recow_ebs;
unsigned int is_chunk_recover:1;
unsigned int quota_enabled:1;
unsigned int suppress_check_block_errors:1;
+ unsigned int ignore_fsid_mismatch:1;
+ unsigned int ignore_chunk_tree_error:1;
+ unsigned int avoid_meta_chunk_alloc:1;
+ unsigned int avoid_sys_chunk_alloc:1;
int (*free_extent_hook)(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
/* node allocations are done in nodesize units */
u32 nodesize;
- /* leaf allocations are done in leafsize units */
+ /* Unused, equal to nodesize */
u32 leafsize;
- /* leaf allocations are done in leafsize units */
+ /* leaf allocations are done in nodesize units */
u32 stripesize;
int ref_cows;
*/
#define BTRFS_BLOCK_GROUP_ITEM_KEY 192
+/*
+ * Every block group is represented in the free space tree by a free space info
+ * item, which stores some accounting information. It is keyed on
+ * (block_group_start, FREE_SPACE_INFO, block_group_length).
+ */
+#define BTRFS_FREE_SPACE_INFO_KEY 198
+
+/*
+ * A free space extent tracks an extent of space that is free in a block group.
+ * It is keyed on (start, FREE_SPACE_EXTENT, length).
+ */
+#define BTRFS_FREE_SPACE_EXTENT_KEY 199
+
+/*
+ * When a block group becomes very fragmented, we convert it to use bitmaps
+ * instead of extents. A free space bitmap is keyed on
+ * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
+ * (length / sectorsize) bits.
+ */
+#define BTRFS_FREE_SPACE_BITMAP_KEY 200
+
#define BTRFS_DEV_EXTENT_KEY 204
#define BTRFS_DEV_ITEM_KEY 216
#define BTRFS_CHUNK_ITEM_KEY 228
BTRFS_SETGET_STACK_FUNCS(block_group_flags,
struct btrfs_block_group_item, flags, 64);
+/* struct btrfs_free_space_info */
+BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
+ extent_count, 32);
+BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
+
/* struct btrfs_inode_ref */
BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
struct btrfs_inode_item, generation, 64);
BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
- struct btrfs_inode_item, generation, 64);
+ struct btrfs_inode_item, sequence, 64);
+BTRFS_SETGET_STACK_FUNCS(stack_inode_transid,
+ struct btrfs_inode_item, transid, 64);
BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
struct btrfs_inode_item, size, 64);
BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
chunk_offset, 64);
BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
+BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_length, struct btrfs_dev_extent,
+ length, 64);
+
static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
{
unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
BTRFS_SETGET_FUNCS(qgroup_status_scan, struct btrfs_qgroup_status_item,
scan, 64);
+BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_version,
+ struct btrfs_qgroup_status_item, version, 64);
+BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_generation,
+ struct btrfs_qgroup_status_item, generation, 64);
+BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_flags,
+ struct btrfs_qgroup_status_item, flags, 64);
+BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_scan,
+ struct btrfs_qgroup_status_item, scan, 64);
+
/* btrfs_qgroup_info_item */
BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
generation, 64);
return btrfs_item_size(eb, e) - offset;
}
+/* struct btrfs_ioctl_search_header */
+static inline u64 btrfs_search_header_transid(struct btrfs_ioctl_search_header *sh)
+{
+ return get_unaligned_64(&sh->transid);
+}
+
+static inline u64 btrfs_search_header_objectid(struct btrfs_ioctl_search_header *sh)
+{
+ return get_unaligned_64(&sh->objectid);
+}
+
+static inline u64 btrfs_search_header_offset(struct btrfs_ioctl_search_header *sh)
+{
+ return get_unaligned_64(&sh->offset);
+}
+
+static inline u32 btrfs_search_header_type(struct btrfs_ioctl_search_header *sh)
+{
+ return get_unaligned_32(&sh->type);
+}
+
+static inline u32 btrfs_search_header_len(struct btrfs_ioctl_search_header *sh)
+{
+ return get_unaligned_32(&sh->len);
+}
+
/* this returns the number of file bytes represented by the inline item.
* If an item is compressed, this is the uncompressed size
*/
return btrfs_file_extent_ram_bytes(eb, fi);
}
+/*
+ * NOTE: Backward compatibility, do not use.
+ * Replacement: read nodesize directly
+ */
+__attribute__((deprecated))
static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
if (level == 0)
return root->leafsize;
return !!(btrfs_super_incompat_flags(disk_super) & flag);
}
+static inline int btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
+{
+ struct btrfs_super_block *disk_super;
+ disk_super = fs_info->super_copy;
+ return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
+}
+
/* helper function to cast into the data area of the leaf. */
#define btrfs_item_ptr(leaf, slot, type) \
((type *)(btrfs_leaf_data(leaf) + \
struct btrfs_inode_item *inode,
u64 file_pos, u64 disk_bytenr,
u64 num_bytes);
+int btrfs_free_block_group(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
+void free_excluded_extents(struct btrfs_root *root,
+ struct btrfs_block_group_cache *cache);
+int exclude_super_stripes(struct btrfs_root *root,
+ struct btrfs_block_group_cache *cache);
+u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
+ struct btrfs_fs_info *info, u64 start, u64 end);
/* ctree.c */
int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
int btrfs_del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
int type);
int btrfs_previous_extent_item(struct btrfs_root *root,
struct btrfs_path *path, u64 min_objectid);
+int btrfs_next_extent_item(struct btrfs_root *root,
+ struct btrfs_path *path, u64 max_objectid);
int btrfs_cow_block(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct extent_buffer *buf,
struct extent_buffer *parent, int parent_slot,
projects / platform / upstream / btrfs-progs.git / blobdiff