/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __FAST_COMMIT_H__#define __FAST_COMMIT_H__ /* * Note this file is present in e2fsprogs/lib/ext2fs/fast_commit.h and * linux/fs/ext4/fast_commit.h. These file should always be byte identical. */ /* Fast commit tags */#define EXT4_FC_TAG_ADD_RANGE		0x0001#define EXT4_FC_TAG_DEL_RANGE		0x0002#define EXT4_FC_TAG_CREAT		0x0003#define EXT4_FC_TAG_LINK		0x0004#define EXT4_FC_TAG_UNLINK		0x0005#define EXT4_FC_TAG_INODE		0x0006#define EXT4_FC_TAG_PAD			0x0007#define EXT4_FC_TAG_TAIL		0x0008#define EXT4_FC_TAG_HEAD		0x0009 #define EXT4_FC_SUPPORTED_FEATURES	0x0 /* On disk fast commit tlv value structures */ /* Fast commit on disk tag length structure */struct ext4_fc_tl {	__le16 fc_tag;	__le16 fc_len;}; /* Value structure for tag EXT4_FC_TAG_HEAD. */struct ext4_fc_head {	__le32 fc_features;	__le32 fc_tid;}; /* Value structure for EXT4_FC_TAG_ADD_RANGE. */struct ext4_fc_add_range {	__le32 fc_ino;	__u8 fc_ex[12];}; /* Value structure for tag EXT4_FC_TAG_DEL_RANGE. */struct ext4_fc_del_range {	__le32 fc_ino;	__le32 fc_lblk;	__le32 fc_len;}; /* * This is the value structure for tags EXT4_FC_TAG_CREAT, EXT4_FC_TAG_LINK * and EXT4_FC_TAG_UNLINK. */struct ext4_fc_dentry_info {	__le32 fc_parent_ino;	__le32 fc_ino;	__u8 fc_dname[0];}; /* Value structure for EXT4_FC_TAG_INODE and EXT4_FC_TAG_INODE_PARTIAL. */struct ext4_fc_inode {	__le32 fc_ino;	__u8 fc_raw_inode[0];}; /* Value structure for tag EXT4_FC_TAG_TAIL. */struct ext4_fc_tail {	__le32 fc_tid;	__le32 fc_crc;}; /* * Fast commit reason codes */enum {	/*	 * Commit status codes:	 */	EXT4_FC_REASON_OK = 0,	EXT4_FC_REASON_INELIGIBLE,	EXT4_FC_REASON_ALREADY_COMMITTED,	EXT4_FC_REASON_FC_START_FAILED,	EXT4_FC_REASON_FC_FAILED, 	/*	 * Fast commit ineligiblity reasons:	 */	EXT4_FC_REASON_XATTR = 0,	EXT4_FC_REASON_CROSS_RENAME,	EXT4_FC_REASON_JOURNAL_FLAG_CHANGE,	EXT4_FC_REASON_NOMEM,	EXT4_FC_REASON_SWAP_BOOT,	EXT4_FC_REASON_RESIZE,	EXT4_FC_REASON_RENAME_DIR,	EXT4_FC_REASON_FALLOC_RANGE,	EXT4_FC_REASON_INODE_JOURNAL_DATA,	EXT4_FC_COMMIT_FAILED,	EXT4_FC_REASON_MAX}; #ifdef __KERNEL__/* * In memory list of dentry updates that are performed on the file * system used by fast commit code. */struct ext4_fc_dentry_update {	int fcd_op;		/* Type of update create / unlink / link */	int fcd_parent;		/* Parent inode number */	int fcd_ino;		/* Inode number */	struct qstr fcd_name;	/* Dirent name */	unsigned char fcd_iname[DNAME_INLINE_LEN];	/* Dirent name string */	struct list_head fcd_list;}; struct ext4_fc_stats {	unsigned int fc_ineligible_reason_count[EXT4_FC_REASON_MAX];	unsigned long fc_num_commits;	unsigned long fc_ineligible_commits;	unsigned long fc_numblks;}; #define EXT4_FC_REPLAY_REALLOC_INCREMENT	4 /* * Physical block regions added to different inodes due to fast commit * recovery. These are set during the SCAN phase. During the replay phase, * our allocator excludes these from its allocation. This ensures that * we don't accidentally allocating a block that is going to be used by * another inode. */struct ext4_fc_alloc_region {	ext4_lblk_t lblk;	ext4_fsblk_t pblk;	int ino, len;}; /* * Fast commit replay state. */struct ext4_fc_replay_state {	int fc_replay_num_tags;	int fc_replay_expected_off;	int fc_current_pass;	int fc_cur_tag;	int fc_crc;	struct ext4_fc_alloc_region *fc_regions;	int fc_regions_size, fc_regions_used, fc_regions_valid;	int *fc_modified_inodes;	int fc_modified_inodes_used, fc_modified_inodes_size;}; #define region_last(__region) (((__region)->lblk) + ((__region)->len) - 1)#endif static inline const char *tag2str(__u16 tag){	switch (tag) {	case EXT4_FC_TAG_LINK:		return "ADD_ENTRY";	case EXT4_FC_TAG_UNLINK:		return "DEL_ENTRY";	case EXT4_FC_TAG_ADD_RANGE:		return "ADD_RANGE";	case EXT4_FC_TAG_CREAT:		return "CREAT_DENTRY";	case EXT4_FC_TAG_DEL_RANGE:		return "DEL_RANGE";	case EXT4_FC_TAG_INODE:		return "INODE";	case EXT4_FC_TAG_PAD:		return "PAD";	case EXT4_FC_TAG_TAIL:		return "TAIL";	case EXT4_FC_TAG_HEAD:		return "HEAD";	default:		return "ERROR";	}} #endif /* __FAST_COMMIT_H__ */