xfs/libxfs/xfs_log_format.h

13  * On-disk Log Format definitions.
15  * This file contains all the on-disk format definitions used within the log. It
16  * includes the physical log structure itself, as well as all the log item
17  * format structures that are written into the log and intepreted by log
18  * recovery. We start with the physical log format definitions, and then work
19  * through all the log items definitions and everything they encode into the
20  * log.
28 #define XLOG_VERSION_2		2		/* Large IClogs, Log sunit */
40 /* Minimum number of transactions that must fit in the log (defined by mkfs) */
43 #define XLOG_REC_SHIFT(log) \  argument
44 	BTOBB(1 << (xfs_has_logv2(log->l_mp) ? \
46 #define XLOG_TOTAL_REC_SHIFT(log) \  argument
47 	BTOBB(XLOG_MAX_ICLOGS << (xfs_has_logv2(log->l_mp) ? \
70 /* Log Clients */
77  * Log item for unmount records.
127  * Flags to log operation header
132  * the remainder of the current active in-core log, it is split up into
167 	__be32	  h_magicno;	/* log record (LR) identifier		:  4 */
168 	__be32	  h_cycle;	/* write cycle of log			:  4 */
173 	__le32	  h_crc;	/* crc of log record                    :  4 */
175 	__be32	  h_num_logops;	/* number of log operations in this LR	:  4 */
178 	__be32    h_fmt;        /* format of log record                 :  4 */
184 	__be32	  xh_cycle;	/* write cycle of log			: 4 */
189  * Quite misnamed, because this union lays out the actual on-disk log buffer.
197 /* not an on-disk structure, but needed by log recovery in userspace */
208  * This is the structure written in the log at the head of every transaction. It
231  * Log item types.
273  * Inode Log Item Format definitions.
275  * This is the structure used to lay out an inode log item in the
276  * log.  The size of the inline data/extents/b-tree root to be logged
281 	uint16_t		ilf_type;	/* inode log item type */
298  * Old 32 bit systems will log in this format without the 64 bit
303 	uint16_t		ilf_type;	/* inode log item type */
322 #define	XFS_ILOG_CORE	0x001	/* log standard inode fields */
323 #define	XFS_ILOG_DDATA	0x002	/* log i_df.if_data */
324 #define	XFS_ILOG_DEXT	0x004	/* log i_df.if_extents */
325 #define	XFS_ILOG_DBROOT	0x008	/* log i_df.i_broot */
326 #define	XFS_ILOG_DEV	0x010	/* log the dev field */
328 #define	XFS_ILOG_ADATA	0x040	/* log i_af.if_data */
329 #define	XFS_ILOG_AEXT	0x080	/* log i_af.if_extents */
330 #define	XFS_ILOG_ABROOT	0x100	/* log i_af.i_broot */
385  * Incore version of the on-disk inode core structures. We log this directly
489  * Buffer Log Format definitions
491  * These are the physical dirty bitmap definitions for the log format structure.
519  * This is the structure used to lay out a buf log item in the log.  The data
535 	unsigned short	blf_type;	/* buf log item type indicator */
596  * EFI/EFD log format definitions
621  * This is the structure used to lay out an efi log item in the
622  * log.  The efi_extents field is a variable size array whose
626 	uint16_t		efi_type;	/* efi log item type */
642 	uint16_t		efi_type;	/* efi log item type */
658 	uint16_t		efi_type;	/* efi log item type */
674  * This is the structure used to lay out an efd log item in the
675  * log.  The efd_extents array is a variable size array whose
679 	uint16_t		efd_type;	/* efd log item type */
695 	uint16_t		efd_type;	/* efd log item type */
711 	uint16_t		efd_type;	/* efd log item type */
727  * RUI/RUD (reverse mapping) log format definitions
758  * This is the structure used to lay out an rui log item in the
759  * log.  The rui_extents field is a variable size array whose
763 	uint16_t		rui_type;	/* rui log item type */
779  * This is the structure used to lay out an rud log item in the
780  * log.  The rud_extents array is a variable size array whose
784 	uint16_t		rud_type;	/* rud log item type */
791  * CUI/CUD (refcount update) log format definitions
806  * This is the structure used to lay out a cui log item in the
807  * log.  The cui_extents field is a variable size array whose
811 	uint16_t		cui_type;	/* cui log item type */
827  * This is the structure used to lay out a cud log item in the
828  * log.  The cud_extents array is a variable size array whose
832 	uint16_t		cud_type;	/* cud log item type */
839  * BUI/BUD (inode block mapping) log format definitions
856  * This is the structure used to lay out an bui log item in the
857  * log.  The bui_extents field is a variable size array whose
861 	uint16_t		bui_type;	/* bui log item type */
877  * This is the structure used to lay out an bud log item in the
878  * log.  The bud_extents array is a variable size array whose
882 	uint16_t		bud_type;	/* bud log item type */
889  * XMI/XMD (file mapping exchange) log format definitions
892 /* This is the structure used to lay out an mapping exchange log item. */
894 	uint16_t		xmi_type;	/* xmi log item type */
935 /* This is the structure used to lay out an mapping exchange done log item. */
937 	uint16_t		xmd_type;	/* xmd log item type */
944  * Dquot Log format definitions.
950 	uint16_t		qlf_type;      /* dquot log item type */
959  * log format struct for QUOTAOFF records.
967 	unsigned short		qf_type;	/* quotaoff log item type */
1007  * Inode create log item structure
1009  * Log recovery assumes the first two entries are the type and size and they fit
1014 	uint16_t	icl_type;	/* type of log format structure */
1015 	uint16_t	icl_size;	/* size of log format structure */
1046  * This is the structure used to lay out an attr log item in the
1047  * log.
1050 	uint16_t	alfi_type;	/* attri log item type */
1073 	uint16_t	alfd_type;	/* attrd log item type */