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/*
* Copyright (c) 2000-2001,2005 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
*/
struct typ;
#define BBMAP_SIZE (XFS_MAX_BLOCKSIZE / BBSIZE)
typedef struct bbmap {
__int64_t b[BBMAP_SIZE];
} bbmap_t;
typedef struct iocur {
__int64_t bb; /* BB number in filesystem of buf */
int blen; /* length of "buf", bb's */
int boff; /* data - buf */
void *buf; /* base address of buffer */
void *data; /* current interesting data */
xfs_ino_t dirino; /* current directory inode number */
xfs_ino_t ino; /* current inode number */
int len; /* length of "data", bytes */
__uint16_t mode; /* current inode's mode */
xfs_off_t off; /* fs offset of "data" in bytes */
const struct typ *typ; /* type of "data" */
int use_bbmap; /* set if bbmap is valid */
bbmap_t bbmap; /* map daddr if fragmented */
} iocur_t;
#define DB_RING_ADD 1 /* add to ring on set_cur */
#define DB_RING_IGN 0 /* do not add to ring on set_cur */
extern iocur_t *iocur_base; /* base of stack */
extern iocur_t *iocur_top; /* top element of stack */
extern int iocur_sp; /* current top of stack */
extern int iocur_len; /* length of stack array */
extern void io_init(void);
extern void off_cur(int off, int len);
extern void pop_cur(void);
extern void print_iocur(char *tag, iocur_t *ioc);
extern void push_cur(void);
extern int read_bbs(__int64_t daddr, int count, void **bufp,
bbmap_t *bbmap);
extern int write_bbs(__int64_t daddr, int count, void *bufp,
bbmap_t *bbmap);
extern void write_cur(void);
extern void set_cur(const struct typ *t, __int64_t d, int c, int ring_add,
bbmap_t *bbmap);
extern void ring_add(void);
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