File: [Development] / xfs-linux-nodel / xfs_log.h (download)
Revision 1.36, Wed Apr 30 22:24:11 1997 UTC (20 years, 5 months ago) by sup
Branch: MAIN
Changes since 1.35: +3 -4
lines
xfs_log_force_umount, and cb_func signature changes.
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#ifndef _XFS_LOG_H
#define _XFS_LOG_H
#ident "$Revision: 1.35 $"
#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
* XFS_LOG_FORCE: Start in-core log write now.
* XFS_LOG_URGE: Start write within some window of time.
*
* Note: Either XFS_LOG_FORCE or XFS_LOG_URGE must be set.
*/
#define XFS_LOG_SYNC 0x1
#define XFS_LOG_FORCE 0x2
#define XFS_LOG_URGE 0x4
/*
* Flags to xfs_log_print()
*
*/
#define XFS_LOG_PRINT_EXIT 0x1
#define XFS_LOG_PRINT_NO_DATA 0x2
#define XFS_LOG_PRINT_NO_PRINT 0x4
/* Log Clients */
#define XFS_TRANSACTION 0x69
#define XFS_VOLUME 0x2
#define XFS_LOG 0xaa
typedef struct xfs_log_iovec {
caddr_t i_addr; /* beginning address of region */
int 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 *, int);
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,
int *clean);
int xfs_log_mount_finish(struct xfs_mount *mp);
void xfs_log_move_tail(struct xfs_mount *mp,
xfs_lsn_t tail_lsn);
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,
int length,
int count,
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);
int xfs_log_force_umount(struct xfs_mount *mp, int logerror);
/* Log manager utility interfaces */
void xfs_log_print(struct xfs_mount *mp,
dev_t log_dev,
daddr_t start_block,
int num_bblocks,
int start_print_block,
uint flags);
extern int xlog_debug; /* set to 1 to enable real log */
#endif /* _XFS_LOG_H */