From: Harshad Shirwadkar <harshadshirwadkar@xxxxxxxxx> Add structs representing on-disk format of the commit header and tlvs in the commit header. Signed-off-by: Harshad Shirwadkar <harshadshirwadkar@xxxxxxxxx> --- fs/ext4/ext4_jbd2.c | 1 + fs/ext4/ext4_jbd2.h | 45 +++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 46 insertions(+) diff --git a/fs/ext4/ext4_jbd2.c b/fs/ext4/ext4_jbd2.c index 4bef01f9814a..fca478a3b7e9 100644 --- a/fs/ext4/ext4_jbd2.c +++ b/fs/ext4/ext4_jbd2.c @@ -4,6 +4,7 @@ */ #include "ext4_jbd2.h" +#include "ext4_extents.h" #include <trace/events/ext4.h> diff --git a/fs/ext4/ext4_jbd2.h b/fs/ext4/ext4_jbd2.h index b1239d6be713..b8ac3f29949d 100644 --- a/fs/ext4/ext4_jbd2.h +++ b/fs/ext4/ext4_jbd2.h @@ -529,7 +529,52 @@ static inline int ext4_should_dioread_nolock(struct inode *inode) return 1; } +/* Ext4 fast commit related info */ + +/* Magic of fast commit header */ +#define EXT4_FC_MAGIC 0xE2540090 + #define EXT4_NUM_FC_BLKS 128 + +struct ext4_fc_commit_hdr { + /* Fast commit magic, should be EXT4_FC_MAGIC */ + __le32 fc_magic; + /* Features used by this fast commit block */ + __u8 fc_features; + /* Number of TLVs in this fast commmit block */ + __le16 fc_num_tlvs; + /* Inode number */ + __le32 fc_ino; + /* Csum(hdr+contents) */ + __le32 fc_csum; +}; + +/* Fast commit on disk tag length structure */ +struct ext4_fc_tl { + __le16 fc_tag; + __le16 fc_len; +}; + +/* On disk fast commit tlv value structure for dirent tags: + * - EXT4_FC_TAG_CREATE_DENTRY + * - EXT4_FC_TAG_ADD_DENTRY + * - EXT4_FC_TAG_DEL_DENTRY + */ +struct ext4_fc_dentry_info { + __le32 fc_parent_ino; + __le32 fc_ino; + u8 fc_dname[0]; +}; + +/* + * On disk fast commit tlv value structure for tag + * EXT4_FC_TAG_HOLE. + */ +struct ext4_fc_lrange { + __le32 fc_lblk; + __le32 fc_len; +}; + void ext4_init_fast_commit(struct super_block *sb, journal_t *journal); void ext4_init_inode_fc_info(struct inode *inode); void ext4_fc_track_range(struct inode *inode, ext4_lblk_t start, -- 2.26.0.110.g2183baf09c-goog