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HEAD
Research V4 release
[unix-history]
/
sys
/
buf.h
struct
buf
{
int
b_flags
;
struct
buf
*
b_forw
;
struct
buf
*
b_back
;
struct
buf
*
av_forw
;
struct
buf
*
av_back
;
int
b_dev
;
int
b_wcount
;
char
*
b_addr
;
char
*
b_blkno
;
}
buf
[
NBUF
];
/*
* forw and back are shared with "buf" struct.
*/
struct
devtab
{
char
d_active
;
char
d_errcnt
;
struct
buf
*
b_forw
;
struct
buf
*
b_back
;
struct
buf
*
d_actf
;
struct
buf
*
d_actl
;
}
devtab
[
NMAJ
];
struct
buf bfreelist
;
#define B_READ 01
#define B_DONE 02
#define B_ERROR 04
#define B_BUSY 010
#define B_XMEM 060
#define B_WANTED 0100
#define B_RELOC 0200
#define B_ASYNC 0400
#define B_DELWRI 01000