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- /*
- * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- * Further, this software is distributed without any warranty that it is
- * free of the rightful claim of any third person regarding infringement
- * or the like. Any license provided herein, whether implied or
- * otherwise, applies only to this software file. Patent licenses, if
- * any, provided herein do not apply to combinations of this program with
- * other software, or any other product whatsoever.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
- * Mountain View, CA 94043, or:
- *
- * http://www.sgi.com
- *
- * For further information regarding this notice, see:
- *
- * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
- */
- #ifndef __XFS_LOG_H__
- #define __XFS_LOG_H__
-
- #if __BYTE_ORDER == __LITTLE_ENDIAN
- #define LSN_FIELD_CYCLE(arch) (((arch)==ARCH_NOCONVERT)?1:0)
- #define LSN_FIELD_BLOCK(arch) (((arch)==ARCH_NOCONVERT)?0:1)
- #else
- #define LSN_FIELD_CYCLE(arch) (0)
- #define LSN_FIELD_BLOCK(arch) (1)
- #endif
-
- /* get lsn fields */
-
- #define CYCLE_LSN(lsn,arch) (INT_GET(((uint *)&(lsn))[LSN_FIELD_CYCLE(arch)], arch))
- #define BLOCK_LSN(lsn,arch) (INT_GET(((uint *)&(lsn))[LSN_FIELD_BLOCK(arch)], arch))
- /* this is used in a spot where we might otherwise double-endian-flip */
- #define CYCLE_LSN_NOCONV(lsn,arch) (((uint *)&(lsn))[LSN_FIELD_CYCLE(arch)])
-
- #ifdef __KERNEL__
- /*
- * By comparing each compnent, we don't have to worry about extra
- * endian issues in treating two 32 bit numbers as one 64 bit number
- */
- static
- #if defined(__GNUC__) && (__GNUC__ == 2) && ( (__GNUC_MINOR__ == 95) || (__GNUC_MINOR__ == 96))
- __attribute__((unused)) /* gcc 2.95, 2.96 miscompile this when inlined */
- #else
- __inline__
- #endif
- xfs_lsn_t _lsn_cmp(xfs_lsn_t lsn1, xfs_lsn_t lsn2, xfs_arch_t arch)
- {
- if (CYCLE_LSN(lsn1, arch) != CYCLE_LSN(lsn2, arch))
- return (CYCLE_LSN(lsn1, arch)<CYCLE_LSN(lsn2, arch))? -999 : 999;
-
- if (BLOCK_LSN(lsn1, arch) != BLOCK_LSN(lsn2, arch))
- return (BLOCK_LSN(lsn1, arch)<BLOCK_LSN(lsn2, arch))? -999 : 999;
-
- return 0;
- }
-
- #define XFS_LSN_CMP_ARCH(x,y,arch) _lsn_cmp(x, y, arch)
- #define XFS_LSN_CMP(x,y) XFS_LSN_CMP_ARCH(x,y,ARCH_NOCONVERT)
- #define XFS_LSN_DIFF_ARCH(x,y,arch) _lsn_cmp(x, y, arch)
- #define XFS_LSN_DIFF(x,y) XFS_LSN_DIFF_ARCH(x,y,ARCH_NOCONVERT)
-
- /*
- * 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
-
- #endif /* __KERNEL__ */
-
-
- /* Log Clients */
- #define XFS_TRANSACTION 0x69
- #define XFS_VOLUME 0x2
- #define XFS_LOG 0xaa
-
- typedef struct xfs_log_iovec {
- xfs_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;
-
-
- #ifdef __KERNEL__
- /* Log manager interfaces */
- struct xfs_mount;
- xfs_lsn_t xfs_log_done(struct xfs_mount *mp,
- xfs_log_ticket_t ticket,
- void **iclog,
- uint flags);
- int xfs_log_force(struct xfs_mount *mp,
- xfs_lsn_t lsn,
- uint flags);
- int xfs_log_mount(struct xfs_mount *mp,
- struct xfs_buftarg *log_target,
- xfs_daddr_t start_block,
- int num_bblocks);
- int xfs_log_mount_finish(struct xfs_mount *mp, int);
- void xfs_log_move_tail(struct xfs_mount *mp,
- xfs_lsn_t tail_lsn);
- int xfs_log_notify(struct xfs_mount *mp,
- void *iclog,
- xfs_log_callback_t *callback_entry);
- int xfs_log_release_iclog(struct xfs_mount *mp,
- void *iclog_hndl);
- int xfs_log_reserve(struct xfs_mount *mp,
- int length,
- int count,
- xfs_log_ticket_t *ticket,
- __uint8_t 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_unmount_write(struct xfs_mount *mp);
- void xfs_log_unmount_dealloc(struct xfs_mount *mp);
- int xfs_log_force_umount(struct xfs_mount *mp, int logerror);
- int xfs_log_need_covered(struct xfs_mount *mp);
-
- void xlog_iodone(struct xfs_buf *);
-
- #endif
-
-
- extern int xlog_debug; /* set to 1 to enable real log */
-
-
- #endif /* __XFS_LOG_H__ */
-