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/*
* zgetdump - Tool for copying and converting System z dumps
*
* Helper functions
*
* Copyright IBM Corp. 2001, 2017
*
* s390-tools is free software; you can redistribute it and/or modify
* it under the terms of the MIT license. See LICENSE for details.
*/
#ifndef ZG_H
#define ZG_H
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/mtio.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include "lib/util_base.h"
#include "lib/zt_common.h"
#define U64_MAX ((u64) -1)
#define U32_MAX ((u32) -1)
#define U16_MAX ((u16) -1)
#define U8_MAX ((u8) -1)
/*
* IEC definitions
*/
#define KIB (1024)
#define MIB (1024 * 1024)
#define GIB (1024 * 1024 * 1024)
#define TO_MIB(x) ((x + (MIB / 2)) / MIB)
#define TO_KIB(x) ((x + (KIB / 2)) / KIB)
/*
* Memory functions
*/
extern void *zg_alloc(unsigned int size);
extern void *zg_realloc(void *ptr, unsigned int size);
extern void zg_free(void *ptr);
extern char *zg_strdup(const char *str);
/*
* At exit functions
*/
typedef void (*zg_atexit_fn_t)(void);
extern void zg_atexit(zg_atexit_fn_t fn);
extern void __noreturn zg_exit(int rc);
/*
* Temporary device node functions
*/
extern char *zg_devnode_create(dev_t dev);
/*
* Progress bar functions
*/
extern void zg_progress_init(const char *msg, u64 mem_size);
extern void zg_progress(u64 addr);
/*
* Error and print functions
*/
#define ERR(x...) \
do { \
fprintf(stderr, "%s: ", "zgetdump"); \
fprintf(stderr, x); \
fprintf(stderr, "\n"); \
} while (0)
#define ERR_EXIT(x...) \
do { \
ERR(x); \
zg_exit(1); \
} while (0)
#define ABORT(x...) \
do { \
ERR("Internal Error: " x); \
abort(); \
} while (0)
#define ERR_EXIT_ERRNO(x...) \
do { \
fflush(stdout); \
fprintf(stderr, "%s: ", "zgetdump"); \
fprintf(stderr, x); \
fprintf(stderr, " (%s)", strerror(errno)); \
fprintf(stderr, "\n"); \
zg_exit(1); \
} while (0)
#define STDERR(x...) \
do { \
fprintf(stderr, x); \
fflush(stderr); \
} while (0)
#define STDERR_PR(x...) \
do { \
fprintf(stderr, "\r%s: ", "zgetdump"); \
fprintf(stderr, x); \
} while (0)
#define STDOUT(x...) \
do { \
fprintf(stdout, x); \
fflush(stdout); \
} while (0)
/*
* Misc
*/
#define PAGE_SIZE 4096UL
#define ALIGN(x, a) __ALIGN_MASK(x, (typeof(x))(a)-1)
#define __ALIGN_MASK(x, mask) (((x) + (mask)) & ~(mask))
#define PAGE_ALIGN(addr) ALIGN(addr, PAGE_SIZE)
#define ARRAY_ELEMENT_CNT(x) (sizeof(x) / sizeof(x[0]))
#define ROUNDUP(x, y) ((((x) + ((y) - 1)) / (y)) * (y))
static inline u32 zg_csum_partial(const void *buf, int len, u32 sum)
{
register unsigned long reg2 asm("2") = (unsigned long) buf;
register unsigned long reg3 asm("3") = (unsigned long) len;
asm volatile(
"0: cksm %0,%1\n" /* do checksum on longs */
" jo 0b\n"
: "+d" (sum), "+d" (reg2), "+d" (reg3) : : "cc", "memory");
return sum;
}
/*
* Pointer atrithmetic
*/
#define PTR_SUB(x, y) (((char *) (x)) - ((unsigned long) (y)))
#define PTR_ADD(x, y) (((char *) (x)) + ((unsigned long) (y)))
#define PTR_DIFF(x, y) ((unsigned long)(((char *) (x)) - ((unsigned long) (y))))
/*
* File functions
*/
struct zg_fh {
const char *path;
int fh;
struct stat sb;
};
enum zg_type {
ZG_TYPE_DASD,
ZG_TYPE_DASD_PART,
ZG_TYPE_FILE,
ZG_TYPE_TAPE,
ZG_TYPE_UNKNOWN,
};
enum zg_check {
ZG_CHECK,
ZG_CHECK_ERR,
ZG_CHECK_NONE,
};
extern const char *zg_path(struct zg_fh *zg_fh);
extern const struct stat *zg_stat(struct zg_fh *zg_fh);
extern struct zg_fh *zg_open(const char *path, int flags, enum zg_check check);
extern void zg_close(struct zg_fh *zg_fh);
extern ssize_t zg_read(struct zg_fh *zg_fh, void *buf, size_t cnt,
enum zg_check check);
extern ssize_t zg_gets(struct zg_fh *zg_fh, void *buf, size_t cnt,
enum zg_check check);
extern u64 zg_size(struct zg_fh *zg_fh);
extern off_t zg_tell(struct zg_fh *zg_fh, enum zg_check check);
extern off_t zg_seek(struct zg_fh *zg_fh, off_t off, enum zg_check check);
extern off_t zg_seek_end(struct zg_fh *zg_fh, off_t off, enum zg_check check);
extern off_t zg_seek_cur(struct zg_fh *zg_fh, off_t off, enum zg_check check);
extern int zg_ioctl(struct zg_fh *zg_fh, int rq, void *data, const char *op,
enum zg_check check);
extern enum zg_type zg_type(struct zg_fh *zg_fh);
/*
* zgetdump actions
*/
enum zg_action {
ZG_ACTION_STDOUT,
ZG_ACTION_DUMP_INFO,
ZG_ACTION_DEVICE_INFO,
ZG_ACTION_MOUNT,
ZG_ACTION_UMOUNT,
};
#endif /* ZG_H */
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