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Disk format changes required for write ahead tree log

master
Chris Mason 2008-09-05 16:15:58 -04:00 committed by David Woodhouse
parent 2f2f9ef77a
commit cea88ec1d7
1 changed files with 20 additions and 2 deletions
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22
ctree.h
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@ -27,7 +27,7 @@
struct btrfs_root;
struct btrfs_trans_handle;
#define BTRFS_MAGIC "_B7RfS_M"
#define BTRFS_MAGIC "_B8RfS_M"
#define BTRFS_MAX_LEVEL 8
@ -58,6 +58,9 @@ struct btrfs_trans_handle;
/* oprhan objectid for tracking unlinked/truncated files */
#define BTRFS_ORPHAN_OBJECTID -5ULL
/* does write ahead logging to speed up fsyncs */
#define BTRFS_TREE_LOG_OBJECTID -6ULL
/*
* All files have objectids higher than this.
*/
@ -256,6 +259,7 @@ struct btrfs_super_block {
__le64 generation;
__le64 root;
__le64 chunk_root;
__le64 log_root;
__le64 total_bytes;
__le64 bytes_used;
__le64 root_dir_objectid;
@ -267,6 +271,7 @@ struct btrfs_super_block {
__le32 sys_chunk_array_size;
u8 root_level;
u8 chunk_root_level;
u8 log_root_level;
struct btrfs_dev_item dev_item;
char label[BTRFS_LABEL_SIZE];
u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
@ -367,7 +372,10 @@ struct btrfs_timespec {
* make a new item type
*/
struct btrfs_inode_item {
/* nfs style generation number */
__le64 generation;
/* transid that last touched this inode */
__le64 transid;
__le64 size;
__le64 nblocks;
__le64 block_group;
@ -386,6 +394,7 @@ struct btrfs_inode_item {
struct btrfs_dir_item {
struct btrfs_disk_key location;
__le64 transid;
__le16 data_len;
__le16 name_len;
u8 type;
@ -486,6 +495,9 @@ struct btrfs_fs_info {
struct btrfs_root *chunk_root;
struct btrfs_root *dev_root;
/* the log root tree is a directory of all the other log roots */
struct btrfs_root *log_root_tree;
struct extent_io_tree extent_cache;
struct extent_io_tree free_space_cache;
struct extent_io_tree block_group_cache;
@ -804,6 +816,7 @@ BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
/* struct btrfs_inode_item */
BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
@ -1029,6 +1042,7 @@ static inline void btrfs_set_item_key(struct extent_buffer *eb,
BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
static inline void btrfs_dir_item_key(struct extent_buffer *eb,
struct btrfs_dir_item *item,
@ -1199,7 +1213,11 @@ BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
chunk_root, 64);
BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
chunk_root_level, 64);
chunk_root_level, 8);
BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
log_root, 64);
BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
log_root_level, 8);
BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
total_bytes, 64);
BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,