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/*
* Structures pulled from dump/tape.c. We need it here so the 'archive' code can
* determine where we are in the tape.
*/
#ifndef _SLAVE_H
#define _SLAVE_H 1
#include <config.h>
#include <protocols/dumprestore.h>
/*
* Concurrent dump mods (Caltech) - disk block reading and tape writing
* are exported to several slave processes. While one slave writes the
* tape, the others read disk blocks; they pass control of the tape in
* a ring via signals. The parent process traverses the filesystem and
* sends writeheader()'s and lists of daddr's to the slaves via pipes.
* The following structure defines the instruction packets sent to slaves.
*/
struct req {
ext2_loff_t dblk;
int count;
int uninit;
};
#define SLAVES 3 /* 1 slave writing, 1 reading, 1 for slack */
struct slave {
long long tapea; /* header number at start of this chunk */
uint32_t count; /* count to next header (used for TS_TAPE */
/* after EOT) */
int inode; /* inode that we are currently dealing with */
int fd; /* FD for this slave */
int pid; /* PID for this slave */
int sent; /* 1 == we've sent this slave requests */
long long firstrec; /* record number of this block */
char (*tblock)[TP_BSIZE]; /* buffer for data blocks */
struct req *req; /* buffer for requests */
void* rawdata; /* Originally allocated buffer */
};
extern struct slave *slp;
#endif
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