186 lines
5.5 KiB
C
186 lines
5.5 KiB
C
/*
|
|
* Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
|
|
* All Rights Reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms 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. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
#ifndef __XFS_LOG_H__
|
|
#define __XFS_LOG_H__
|
|
|
|
struct xfs_log_vec {
|
|
struct xfs_log_vec *lv_next; /* next lv in build list */
|
|
int lv_niovecs; /* number of iovecs in lv */
|
|
struct xfs_log_iovec *lv_iovecp; /* iovec array */
|
|
struct xfs_log_item *lv_item; /* owner */
|
|
char *lv_buf; /* formatted buffer */
|
|
int lv_bytes; /* accounted space in buffer */
|
|
int lv_buf_len; /* aligned size of buffer */
|
|
int lv_size; /* size of allocated lv */
|
|
};
|
|
|
|
#define XFS_LOG_VEC_ORDERED (-1)
|
|
|
|
static inline void *
|
|
xlog_prepare_iovec(struct xfs_log_vec *lv, struct xfs_log_iovec **vecp,
|
|
uint type)
|
|
{
|
|
struct xfs_log_iovec *vec = *vecp;
|
|
|
|
if (vec) {
|
|
ASSERT(vec - lv->lv_iovecp < lv->lv_niovecs);
|
|
vec++;
|
|
} else {
|
|
vec = &lv->lv_iovecp[0];
|
|
}
|
|
|
|
vec->i_type = type;
|
|
vec->i_addr = lv->lv_buf + lv->lv_buf_len;
|
|
|
|
ASSERT(IS_ALIGNED((unsigned long)vec->i_addr, sizeof(uint64_t)));
|
|
|
|
*vecp = vec;
|
|
return vec->i_addr;
|
|
}
|
|
|
|
/*
|
|
* We need to make sure the next buffer is naturally aligned for the biggest
|
|
* basic data type we put into it. We already accounted for this padding when
|
|
* sizing the buffer.
|
|
*
|
|
* However, this padding does not get written into the log, and hence we have to
|
|
* track the space used by the log vectors separately to prevent log space hangs
|
|
* due to inaccurate accounting (i.e. a leak) of the used log space through the
|
|
* CIL context ticket.
|
|
*/
|
|
static inline void
|
|
xlog_finish_iovec(struct xfs_log_vec *lv, struct xfs_log_iovec *vec, int len)
|
|
{
|
|
lv->lv_buf_len += round_up(len, sizeof(uint64_t));
|
|
lv->lv_bytes += len;
|
|
vec->i_len = len;
|
|
}
|
|
|
|
static inline void *
|
|
xlog_copy_iovec(struct xfs_log_vec *lv, struct xfs_log_iovec **vecp,
|
|
uint type, void *data, int len)
|
|
{
|
|
void *buf;
|
|
|
|
buf = xlog_prepare_iovec(lv, vecp, type);
|
|
memcpy(buf, data, len);
|
|
xlog_finish_iovec(lv, *vecp, len);
|
|
return buf;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
|
|
/*
|
|
* By comparing each component, we don't have to worry about extra
|
|
* endian issues in treating two 32 bit numbers as one 64 bit number
|
|
*/
|
|
static inline xfs_lsn_t _lsn_cmp(xfs_lsn_t lsn1, xfs_lsn_t lsn2)
|
|
{
|
|
if (CYCLE_LSN(lsn1) != CYCLE_LSN(lsn2))
|
|
return (CYCLE_LSN(lsn1)<CYCLE_LSN(lsn2))? -999 : 999;
|
|
|
|
if (BLOCK_LSN(lsn1) != BLOCK_LSN(lsn2))
|
|
return (BLOCK_LSN(lsn1)<BLOCK_LSN(lsn2))? -999 : 999;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define XFS_LSN_CMP(x,y) _lsn_cmp(x,y)
|
|
|
|
/*
|
|
* Flags to xfs_log_force()
|
|
*
|
|
* XFS_LOG_SYNC: Synchronous force in-core log to disk
|
|
*/
|
|
#define XFS_LOG_SYNC 0x1
|
|
|
|
/* Log manager interfaces */
|
|
struct xfs_mount;
|
|
struct xlog_in_core;
|
|
struct xlog_ticket;
|
|
struct xfs_log_item;
|
|
struct xfs_item_ops;
|
|
struct xfs_trans;
|
|
struct xfs_log_callback;
|
|
|
|
xfs_lsn_t xfs_log_done(struct xfs_mount *mp,
|
|
struct xlog_ticket *ticket,
|
|
struct xlog_in_core **iclog,
|
|
bool regrant);
|
|
int _xfs_log_force(struct xfs_mount *mp,
|
|
uint flags,
|
|
int *log_forced);
|
|
void xfs_log_force(struct xfs_mount *mp,
|
|
uint flags);
|
|
int _xfs_log_force_lsn(struct xfs_mount *mp,
|
|
xfs_lsn_t lsn,
|
|
uint flags,
|
|
int *log_forced);
|
|
void xfs_log_force_lsn(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 xfs_log_mount_cancel(struct xfs_mount *);
|
|
xfs_lsn_t xlog_assign_tail_lsn(struct xfs_mount *mp);
|
|
xfs_lsn_t xlog_assign_tail_lsn_locked(struct xfs_mount *mp);
|
|
void xfs_log_space_wake(struct xfs_mount *mp);
|
|
int xfs_log_notify(struct xfs_mount *mp,
|
|
struct xlog_in_core *iclog,
|
|
struct xfs_log_callback *callback_entry);
|
|
int xfs_log_release_iclog(struct xfs_mount *mp,
|
|
struct xlog_in_core *iclog);
|
|
int xfs_log_reserve(struct xfs_mount *mp,
|
|
int length,
|
|
int count,
|
|
struct xlog_ticket **ticket,
|
|
__uint8_t clientid,
|
|
bool permanent);
|
|
int xfs_log_regrant(struct xfs_mount *mp, struct xlog_ticket *tic);
|
|
int xfs_log_unmount_write(struct xfs_mount *mp);
|
|
void xfs_log_unmount(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 *);
|
|
|
|
struct xlog_ticket *xfs_log_ticket_get(struct xlog_ticket *ticket);
|
|
void xfs_log_ticket_put(struct xlog_ticket *ticket);
|
|
|
|
void xfs_log_commit_cil(struct xfs_mount *mp, struct xfs_trans *tp,
|
|
xfs_lsn_t *commit_lsn, bool regrant);
|
|
bool xfs_log_item_in_current_chkpt(struct xfs_log_item *lip);
|
|
|
|
void xfs_log_work_queue(struct xfs_mount *mp);
|
|
void xfs_log_worker(struct work_struct *work);
|
|
void xfs_log_quiesce(struct xfs_mount *mp);
|
|
bool xfs_log_check_lsn(struct xfs_mount *, xfs_lsn_t);
|
|
|
|
#endif /* __XFS_LOG_H__ */
|