File: [Development] / xfs-linux / xfs_log.h (download)
Revision 1.22, Fri Apr 22 20:56:08 1994 UTC (23 years, 6 months ago) by miken
Branch: MAIN
Changes since 1.21: +2 -2
lines
change XFS_TRANSACTION to a more noticible value
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#ifndef _XFS_LOG_H
#define _XFS_LOG_H
#ident "$Revision: 1.19 $"
#define XFS_LSN_CMP(x,y) ((x) - (y))
#define XFS_LSN_DIFF(x,y) ((x) - (y))
/*
* Macros, structures, prototypes for interface to the log manager.
*/
/*
* Flags to xfs_log_mount
*/
#define XFS_LOG_RECOVER 0x1
/*
* Flags to xfs_log_done()
*/
#define XFS_LOG_REL_PERM_RESERV 0x1
/*
* Flags to xfs_log_reserve()
*
* XFS_LOG_SLEEP: If space is not available, sleep (default)
* XFS_LOG_NOSLEEP: If space is not available, return error
* XFS_LOG_PERM_RESERV: Permanent reservation. When writes are
* performed against this type of reservation, the reservation
* is not decreased. Long running transactions should use this.
*/
#define XFS_LOG_SLEEP 0x0
#define XFS_LOG_NOSLEEP 0x1
#define XFS_LOG_PERM_RESERV 0x2
#define XFS_LOG_RESV_ALL (XFS_LOG_NOSLEEP|XFS_LOG_PERM_RESERV)
/*
* Flags to xfs_log_force()
*
* XFS_LOG_SYNC: Synchronous force in-core log to disk. (default)
* XFS_LOG_FORCE: Start in-core log write now.
* XFS_LOG_URGE: Start write within some window of time.
*/
#define XFS_LOG_SYNC 0x1
#define XFS_LOG_FORCE 0x2
#define XFS_LOG_URGE 0x4
/*
* Flags to xfs_log_print()
*
* XFS_LOG_PRINT_FORCE:
*/
#define XFS_LOG_PRINT_FORCE 0x1
#define XFS_LOG_PRINT_NO_DATA 0x2
/* Log Clients */
#define XFS_TRANSACTION 0x69
#define XFS_VOLUME 0x2
typedef struct xfs_log_iovec {
caddr_t i_addr; /* beginning address of region */
uint i_len; /* length in bytes of region */
} xfs_log_iovec_t;
typedef void* xfs_log_ticket_t;
/*
* Structure used to pass callback function and the function's argument
* to the log manager.
*/
typedef struct xfs_log_callback {
struct xfs_log_callback *cb_next;
void (*cb_func)(void *);
void *cb_arg;
} xfs_log_callback_t;
/* Log manager interfaces */
struct xfs_mount;
xfs_lsn_t xfs_log_done(struct xfs_mount *mp,
xfs_log_ticket_t ticket,
uint flags);
int xfs_log_force(struct xfs_mount *mp,
xfs_lsn_t lsn,
uint flags);
int xfs_log_init(void);
int xfs_log_mount(struct xfs_mount *mp,
dev_t log_dev,
daddr_t start_block,
int num_bblocks,
uint flags);
void xfs_log_notify(struct xfs_mount *mp,
xfs_lsn_t lsn,
xfs_log_callback_t *callback_entry);
int xfs_log_reserve(struct xfs_mount *mp,
uint length,
xfs_log_ticket_t *ticket,
char clientid,
uint flags);
int xfs_log_write(struct xfs_mount *mp,
xfs_log_iovec_t region[],
int nentries,
xfs_log_ticket_t ticket,
xfs_lsn_t *start_lsn);
int xfs_log_unmount(struct xfs_mount *mp);
/* Log manager utility interfaces */
void xfs_log_print(struct xfs_mount *mp,
dev_t log_dev,
daddr_t start_block,
int num_bblocks,
uint flags);
extern int xlog_debug; /* set to 1 to enable real log */
#define XFS_ERECOVER 4 /* Failure to recover log */
#define XFS_ENOLOGSPACE 3 /* Reservation too large */
#define XFS_ENOTSUP 1
#define XFS_ENOLSN 5 /* Can't find the lsn you asked for */
#define XFS_ENOTFOUND 6
#endif /* _XFS_LOG_H */