210 lines
6.0 KiB
C
210 lines
6.0 KiB
C
/*
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* Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __XFS_LOG_H__
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#define __XFS_LOG_H__
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/* get lsn fields */
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#define CYCLE_LSN(lsn) ((uint)((lsn)>>32))
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#define BLOCK_LSN(lsn) ((uint)(lsn))
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/* this is used in a spot where we might otherwise double-endian-flip */
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#define CYCLE_LSN_DISK(lsn) (((__be32 *)&(lsn))[0])
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#ifdef __KERNEL__
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/*
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* By comparing each component, we don't have to worry about extra
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* endian issues in treating two 32 bit numbers as one 64 bit number
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*/
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static inline xfs_lsn_t _lsn_cmp(xfs_lsn_t lsn1, xfs_lsn_t lsn2)
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{
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if (CYCLE_LSN(lsn1) != CYCLE_LSN(lsn2))
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return (CYCLE_LSN(lsn1)<CYCLE_LSN(lsn2))? -999 : 999;
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if (BLOCK_LSN(lsn1) != BLOCK_LSN(lsn2))
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return (BLOCK_LSN(lsn1)<BLOCK_LSN(lsn2))? -999 : 999;
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return 0;
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}
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#define XFS_LSN_CMP(x,y) _lsn_cmp(x,y)
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/*
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* Macros, structures, prototypes for interface to the log manager.
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*/
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/*
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* Flags to xfs_log_done()
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*/
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#define XFS_LOG_REL_PERM_RESERV 0x1
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/*
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* Flags to xfs_log_reserve()
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*
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* XFS_LOG_SLEEP: If space is not available, sleep (default)
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* XFS_LOG_NOSLEEP: If space is not available, return error
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* XFS_LOG_PERM_RESERV: Permanent reservation. When writes are
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* performed against this type of reservation, the reservation
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* is not decreased. Long running transactions should use this.
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*/
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#define XFS_LOG_SLEEP 0x0
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#define XFS_LOG_NOSLEEP 0x1
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#define XFS_LOG_PERM_RESERV 0x2
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/*
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* Flags to xfs_log_force()
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*
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* XFS_LOG_SYNC: Synchronous force in-core log to disk
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*/
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#define XFS_LOG_SYNC 0x1
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#endif /* __KERNEL__ */
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/* Log Clients */
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#define XFS_TRANSACTION 0x69
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#define XFS_VOLUME 0x2
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#define XFS_LOG 0xaa
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/* Region types for iovec's i_type */
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#define XLOG_REG_TYPE_BFORMAT 1
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#define XLOG_REG_TYPE_BCHUNK 2
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#define XLOG_REG_TYPE_EFI_FORMAT 3
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#define XLOG_REG_TYPE_EFD_FORMAT 4
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#define XLOG_REG_TYPE_IFORMAT 5
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#define XLOG_REG_TYPE_ICORE 6
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#define XLOG_REG_TYPE_IEXT 7
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#define XLOG_REG_TYPE_IBROOT 8
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#define XLOG_REG_TYPE_ILOCAL 9
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#define XLOG_REG_TYPE_IATTR_EXT 10
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#define XLOG_REG_TYPE_IATTR_BROOT 11
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#define XLOG_REG_TYPE_IATTR_LOCAL 12
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#define XLOG_REG_TYPE_QFORMAT 13
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#define XLOG_REG_TYPE_DQUOT 14
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#define XLOG_REG_TYPE_QUOTAOFF 15
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#define XLOG_REG_TYPE_LRHEADER 16
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#define XLOG_REG_TYPE_UNMOUNT 17
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#define XLOG_REG_TYPE_COMMIT 18
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#define XLOG_REG_TYPE_TRANSHDR 19
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#define XLOG_REG_TYPE_MAX 19
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typedef struct xfs_log_iovec {
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xfs_caddr_t i_addr; /* beginning address of region */
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int i_len; /* length in bytes of region */
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uint i_type; /* type of region */
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} xfs_log_iovec_t;
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struct xfs_log_vec {
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struct xfs_log_vec *lv_next; /* next lv in build list */
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int lv_niovecs; /* number of iovecs in lv */
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struct xfs_log_iovec *lv_iovecp; /* iovec array */
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struct xfs_log_item *lv_item; /* owner */
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char *lv_buf; /* formatted buffer */
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int lv_buf_len; /* size of formatted buffer */
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};
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/*
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* Structure used to pass callback function and the function's argument
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* to the log manager.
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*/
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typedef struct xfs_log_callback {
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struct xfs_log_callback *cb_next;
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void (*cb_func)(void *, int);
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void *cb_arg;
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} xfs_log_callback_t;
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#ifdef __KERNEL__
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/* Log manager interfaces */
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struct xfs_mount;
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struct xlog_in_core;
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struct xlog_ticket;
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struct xfs_log_item;
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struct xfs_item_ops;
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struct xfs_trans;
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void xfs_log_item_init(struct xfs_mount *mp,
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struct xfs_log_item *item,
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int type,
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struct xfs_item_ops *ops);
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xfs_lsn_t xfs_log_done(struct xfs_mount *mp,
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struct xlog_ticket *ticket,
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struct xlog_in_core **iclog,
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uint flags);
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int _xfs_log_force(struct xfs_mount *mp,
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uint flags,
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int *log_forced);
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void xfs_log_force(struct xfs_mount *mp,
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uint flags);
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int _xfs_log_force_lsn(struct xfs_mount *mp,
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xfs_lsn_t lsn,
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uint flags,
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int *log_forced);
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void xfs_log_force_lsn(struct xfs_mount *mp,
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xfs_lsn_t lsn,
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uint flags);
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int xfs_log_mount(struct xfs_mount *mp,
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struct xfs_buftarg *log_target,
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xfs_daddr_t start_block,
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int num_bblocks);
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int xfs_log_mount_finish(struct xfs_mount *mp);
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void xfs_log_move_tail(struct xfs_mount *mp,
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xfs_lsn_t tail_lsn);
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int xfs_log_notify(struct xfs_mount *mp,
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struct xlog_in_core *iclog,
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xfs_log_callback_t *callback_entry);
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int xfs_log_release_iclog(struct xfs_mount *mp,
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struct xlog_in_core *iclog);
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int xfs_log_reserve(struct xfs_mount *mp,
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int length,
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int count,
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struct xlog_ticket **ticket,
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__uint8_t clientid,
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uint flags,
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uint t_type);
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int xfs_log_write(struct xfs_mount *mp,
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xfs_log_iovec_t region[],
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int nentries,
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struct xlog_ticket *ticket,
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xfs_lsn_t *start_lsn);
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int xfs_log_unmount_write(struct xfs_mount *mp);
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void xfs_log_unmount(struct xfs_mount *mp);
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int xfs_log_force_umount(struct xfs_mount *mp, int logerror);
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int xfs_log_need_covered(struct xfs_mount *mp);
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void xlog_iodone(struct xfs_buf *);
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struct xlog_ticket *xfs_log_ticket_get(struct xlog_ticket *ticket);
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void xfs_log_ticket_put(struct xlog_ticket *ticket);
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xlog_tid_t xfs_log_get_trans_ident(struct xfs_trans *tp);
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int xfs_log_commit_cil(struct xfs_mount *mp, struct xfs_trans *tp,
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struct xfs_log_vec *log_vector,
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xfs_lsn_t *commit_lsn, int flags);
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bool xfs_log_item_in_current_chkpt(struct xfs_log_item *lip);
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#endif
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extern int xlog_debug; /* set to 1 to enable real log */
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#endif /* __XFS_LOG_H__ */
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