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xemu/include/qemu-common.h
Wenchao Xia 44e3e053af qmp: add interface blockdev-snapshot-delete-internal-sync 
This interface use id and name as optional parameters, to handle the
case that one image contain multiple snapshots with same name which
may be '', but with different id.

Adding parameter id is for historical compatiability reason, and
that case is not possible in qemu's new interface for internal
snapshot at block device level, but still possible in qemu-img.

Signed-off-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-09-12 10:12:47 +02:00

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/* Common header file that is included by all of QEMU.
*
* This file is supposed to be included only by .c files. No header file should
* depend on qemu-common.h, as this would easily lead to circular header
* dependencies.
*
* If a header file uses a definition from qemu-common.h, that definition
* must be moved to a separate header file, and the header that uses it
* must include that header.
*/
#ifndef QEMU_COMMON_H
#define QEMU_COMMON_H
#include "qemu/compiler.h"
#include "config-host.h"
#include "qemu/typedefs.h"
#if defined(__arm__) || defined(__sparc__) || defined(__mips__) || defined(__hppa__) || defined(__ia64__)
#define WORDS_ALIGNED
#endif
#define TFR(expr) do { if ((expr) != -1) break; } while (errno == EINTR)
/* we put basic includes here to avoid repeating them in device drivers */
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdbool.h>
#include <string.h>
#include <strings.h>
#include <inttypes.h>
#include <limits.h>
#include <time.h>
#include <ctype.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <assert.h>
#include <signal.h>
#include "glib-compat.h"
#ifdef _WIN32
#include "sysemu/os-win32.h"
#endif
#ifdef CONFIG_POSIX
#include "sysemu/os-posix.h"
#endif
#ifndef O_LARGEFILE
#define O_LARGEFILE 0
#endif
#ifndef O_BINARY
#define O_BINARY 0
#endif
#ifndef MAP_ANONYMOUS
#define MAP_ANONYMOUS MAP_ANON
#endif
#ifndef ENOMEDIUM
#define ENOMEDIUM ENODEV
#endif
#if !defined(ENOTSUP)
#define ENOTSUP 4096
#endif
#if !defined(ECANCELED)
#define ECANCELED 4097
#endif
#if !defined(EMEDIUMTYPE)
#define EMEDIUMTYPE 4098
#endif
#ifndef TIME_MAX
#define TIME_MAX LONG_MAX
#endif
/* HOST_LONG_BITS is the size of a native pointer in bits. */
#if UINTPTR_MAX == UINT32_MAX
# define HOST_LONG_BITS 32
#elif UINTPTR_MAX == UINT64_MAX
# define HOST_LONG_BITS 64
#else
# error Unknown pointer size
#endif
typedef int (*fprintf_function)(FILE *f, const char *fmt, ...)
GCC_FMT_ATTR(2, 3);
#ifdef _WIN32
#define fsync _commit
#if !defined(lseek)
# define lseek _lseeki64
#endif
int qemu_ftruncate64(int, int64_t);
#if !defined(ftruncate)
# define ftruncate qemu_ftruncate64
#endif
static inline char *realpath(const char *path, char *resolved_path)
{
_fullpath(resolved_path, path, _MAX_PATH);
return resolved_path;
}
#endif
/* icount */
void configure_icount(const char *option);
extern int use_icount;
#include "qemu/osdep.h"
#include "qemu/bswap.h"
/* FIXME: Remove NEED_CPU_H. */
#ifdef NEED_CPU_H
#include "cpu.h"
#endif /* !defined(NEED_CPU_H) */
/* main function, renamed */
#if defined(CONFIG_COCOA)
int qemu_main(int argc, char **argv, char **envp);
#endif
void qemu_get_timedate(struct tm *tm, int offset);
int qemu_timedate_diff(struct tm *tm);
#if !GLIB_CHECK_VERSION(2, 20, 0)
/*
* Glib before 2.20.0 doesn't implement g_poll, so wrap it to compile properly
* on older systems.
*/
static inline gint g_poll(GPollFD *fds, guint nfds, gint timeout)
{
GMainContext *ctx = g_main_context_default();
return g_main_context_get_poll_func(ctx)(fds, nfds, timeout);
}
#endif
/**
* is_help_option:
* @s: string to test
*
* Check whether @s is one of the standard strings which indicate
* that the user is asking for a list of the valid values for a
* command option like -cpu or -M. The current accepted strings
* are 'help' and '?'. '?' is deprecated (it is a shell wildcard
* which makes it annoying to use in a reliable way) but provided
* for backwards compatibility.
*
* Returns: true if @s is a request for a list.
*/
static inline bool is_help_option(const char *s)
{
return !strcmp(s, "?") || !strcmp(s, "help");
}
/* cutils.c */
void pstrcpy(char *buf, int buf_size, const char *str);
void strpadcpy(char *buf, int buf_size, const char *str, char pad);
char *pstrcat(char *buf, int buf_size, const char *s);
int strstart(const char *str, const char *val, const char **ptr);
int stristart(const char *str, const char *val, const char **ptr);
int qemu_strnlen(const char *s, int max_len);
char *qemu_strsep(char **input, const char *delim);
time_t mktimegm(struct tm *tm);
int qemu_fls(int i);
int qemu_fdatasync(int fd);
int fcntl_setfl(int fd, int flag);
int qemu_parse_fd(const char *param);
int parse_uint(const char *s, unsigned long long *value, char **endptr,
int base);
int parse_uint_full(const char *s, unsigned long long *value, int base);
/*
* strtosz() suffixes used to specify the default treatment of an
* argument passed to strtosz() without an explicit suffix.
* These should be defined using upper case characters in the range
* A-Z, as strtosz() will use qemu_toupper() on the given argument
* prior to comparison.
*/
#define STRTOSZ_DEFSUFFIX_EB 'E'
#define STRTOSZ_DEFSUFFIX_PB 'P'
#define STRTOSZ_DEFSUFFIX_TB 'T'
#define STRTOSZ_DEFSUFFIX_GB 'G'
#define STRTOSZ_DEFSUFFIX_MB 'M'
#define STRTOSZ_DEFSUFFIX_KB 'K'
#define STRTOSZ_DEFSUFFIX_B 'B'
int64_t strtosz(const char *nptr, char **end);
int64_t strtosz_suffix(const char *nptr, char **end, const char default_suffix);
int64_t strtosz_suffix_unit(const char *nptr, char **end,
const char default_suffix, int64_t unit);
/* used to print char* safely */
#define STR_OR_NULL(str) ((str) ? (str) : "null")
/* path.c */
void init_paths(const char *prefix);
const char *path(const char *pathname);
#define qemu_isalnum(c) isalnum((unsigned char)(c))
#define qemu_isalpha(c) isalpha((unsigned char)(c))
#define qemu_iscntrl(c) iscntrl((unsigned char)(c))
#define qemu_isdigit(c) isdigit((unsigned char)(c))
#define qemu_isgraph(c) isgraph((unsigned char)(c))
#define qemu_islower(c) islower((unsigned char)(c))
#define qemu_isprint(c) isprint((unsigned char)(c))
#define qemu_ispunct(c) ispunct((unsigned char)(c))
#define qemu_isspace(c) isspace((unsigned char)(c))
#define qemu_isupper(c) isupper((unsigned char)(c))
#define qemu_isxdigit(c) isxdigit((unsigned char)(c))
#define qemu_tolower(c) tolower((unsigned char)(c))
#define qemu_toupper(c) toupper((unsigned char)(c))
#define qemu_isascii(c) isascii((unsigned char)(c))
#define qemu_toascii(c) toascii((unsigned char)(c))
void *qemu_oom_check(void *ptr);
ssize_t qemu_write_full(int fd, const void *buf, size_t count)
QEMU_WARN_UNUSED_RESULT;
ssize_t qemu_send_full(int fd, const void *buf, size_t count, int flags)
QEMU_WARN_UNUSED_RESULT;
ssize_t qemu_recv_full(int fd, void *buf, size_t count, int flags)
QEMU_WARN_UNUSED_RESULT;
#ifndef _WIN32
int qemu_pipe(int pipefd[2]);
/* like openpty() but also makes it raw; return master fd */
int qemu_openpty_raw(int *aslave, char *pty_name);
#endif
#ifdef _WIN32
/* MinGW needs type casts for the 'buf' and 'optval' arguments. */
#define qemu_getsockopt(sockfd, level, optname, optval, optlen) \
getsockopt(sockfd, level, optname, (void *)optval, optlen)
#define qemu_setsockopt(sockfd, level, optname, optval, optlen) \
setsockopt(sockfd, level, optname, (const void *)optval, optlen)
#define qemu_recv(sockfd, buf, len, flags) recv(sockfd, (void *)buf, len, flags)
#define qemu_sendto(sockfd, buf, len, flags, destaddr, addrlen) \
sendto(sockfd, (const void *)buf, len, flags, destaddr, addrlen)
#else
#define qemu_getsockopt(sockfd, level, optname, optval, optlen) \
getsockopt(sockfd, level, optname, optval, optlen)
#define qemu_setsockopt(sockfd, level, optname, optval, optlen) \
setsockopt(sockfd, level, optname, optval, optlen)
#define qemu_recv(sockfd, buf, len, flags) recv(sockfd, buf, len, flags)
#define qemu_sendto(sockfd, buf, len, flags, destaddr, addrlen) \
sendto(sockfd, buf, len, flags, destaddr, addrlen)
#endif
/* Error handling. */
void QEMU_NORETURN hw_error(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
struct ParallelIOArg {
void *buffer;
int count;
};
typedef int (*DMA_transfer_handler) (void *opaque, int nchan, int pos, int size);
typedef uint64_t pcibus_t;
typedef enum LostTickPolicy {
LOST_TICK_DISCARD,
LOST_TICK_DELAY,
LOST_TICK_MERGE,
LOST_TICK_SLEW,
LOST_TICK_MAX
} LostTickPolicy;
typedef struct PCIHostDeviceAddress {
unsigned int domain;
unsigned int bus;
unsigned int slot;
unsigned int function;
} PCIHostDeviceAddress;
void tcg_exec_init(unsigned long tb_size);
bool tcg_enabled(void);
void cpu_exec_init_all(void);
/* CPU save/load. */
#ifdef CPU_SAVE_VERSION
void cpu_save(QEMUFile *f, void *opaque);
int cpu_load(QEMUFile *f, void *opaque, int version_id);
#endif
/* Unblock cpu */
void qemu_cpu_kick_self(void);
/* work queue */
struct qemu_work_item {
struct qemu_work_item *next;
void (*func)(void *data);
void *data;
int done;
bool free;
};
/**
* Sends a (part of) iovec down a socket, yielding when the socket is full, or
* Receives data into a (part of) iovec from a socket,
* yielding when there is no data in the socket.
* The same interface as qemu_sendv_recvv(), with added yielding.
* XXX should mark these as coroutine_fn
*/
ssize_t qemu_co_sendv_recvv(int sockfd, struct iovec *iov, unsigned iov_cnt,
size_t offset, size_t bytes, bool do_send);
#define qemu_co_recvv(sockfd, iov, iov_cnt, offset, bytes) \
qemu_co_sendv_recvv(sockfd, iov, iov_cnt, offset, bytes, false)
#define qemu_co_sendv(sockfd, iov, iov_cnt, offset, bytes) \
qemu_co_sendv_recvv(sockfd, iov, iov_cnt, offset, bytes, true)
/**
* The same as above, but with just a single buffer
*/
ssize_t qemu_co_send_recv(int sockfd, void *buf, size_t bytes, bool do_send);
#define qemu_co_recv(sockfd, buf, bytes) \
qemu_co_send_recv(sockfd, buf, bytes, false)
#define qemu_co_send(sockfd, buf, bytes) \
qemu_co_send_recv(sockfd, buf, bytes, true)
typedef struct QEMUIOVector {
struct iovec *iov;
int niov;
int nalloc;
size_t size;
} QEMUIOVector;
void qemu_iovec_init(QEMUIOVector *qiov, int alloc_hint);
void qemu_iovec_init_external(QEMUIOVector *qiov, struct iovec *iov, int niov);
void qemu_iovec_add(QEMUIOVector *qiov, void *base, size_t len);
void qemu_iovec_concat(QEMUIOVector *dst,
QEMUIOVector *src, size_t soffset, size_t sbytes);
void qemu_iovec_concat_iov(QEMUIOVector *dst,
struct iovec *src_iov, unsigned int src_cnt,
size_t soffset, size_t sbytes);
void qemu_iovec_destroy(QEMUIOVector *qiov);
void qemu_iovec_reset(QEMUIOVector *qiov);
size_t qemu_iovec_to_buf(QEMUIOVector *qiov, size_t offset,
void *buf, size_t bytes);
size_t qemu_iovec_from_buf(QEMUIOVector *qiov, size_t offset,
const void *buf, size_t bytes);
size_t qemu_iovec_memset(QEMUIOVector *qiov, size_t offset,
int fillc, size_t bytes);
bool buffer_is_zero(const void *buf, size_t len);
void qemu_progress_init(int enabled, float min_skip);
void qemu_progress_end(void);
void qemu_progress_print(float delta, int max);
const char *qemu_get_vm_name(void);
#define QEMU_FILE_TYPE_BIOS 0
#define QEMU_FILE_TYPE_KEYMAP 1
char *qemu_find_file(int type, const char *name);
/* OS specific functions */
void os_setup_early_signal_handling(void);
char *os_find_datadir(const char *argv0);
void os_parse_cmd_args(int index, const char *optarg);
void os_pidfile_error(void);
/* Convert a byte between binary and BCD. */
static inline uint8_t to_bcd(uint8_t val)
{
return ((val / 10) << 4) | (val % 10);
}
static inline uint8_t from_bcd(uint8_t val)
{
return ((val >> 4) * 10) + (val & 0x0f);
}
/* compute with 96 bit intermediate result: (a*b)/c */
static inline uint64_t muldiv64(uint64_t a, uint32_t b, uint32_t c)
{
union {
uint64_t ll;
struct {
#ifdef HOST_WORDS_BIGENDIAN
uint32_t high, low;
#else
uint32_t low, high;
#endif
} l;
} u, res;
uint64_t rl, rh;
u.ll = a;
rl = (uint64_t)u.l.low * (uint64_t)b;
rh = (uint64_t)u.l.high * (uint64_t)b;
rh += (rl >> 32);
res.l.high = rh / c;
res.l.low = (((rh % c) << 32) + (rl & 0xffffffff)) / c;
return res.ll;
}
/* Round number down to multiple */
#define QEMU_ALIGN_DOWN(n, m) ((n) / (m) * (m))
/* Round number up to multiple */
#define QEMU_ALIGN_UP(n, m) QEMU_ALIGN_DOWN((n) + (m) - 1, (m))
static inline bool is_power_of_2(uint64_t value)
{
if (!value) {
return 0;
}
return !(value & (value - 1));
}
/* round down to the nearest power of 2*/
int64_t pow2floor(int64_t value);
#include "qemu/module.h"
/*
* Implementation of ULEB128 (http://en.wikipedia.org/wiki/LEB128)
* Input is limited to 14-bit numbers
*/
int uleb128_encode_small(uint8_t *out, uint32_t n);
int uleb128_decode_small(const uint8_t *in, uint32_t *n);
/* unicode.c */
int mod_utf8_codepoint(const char *s, size_t n, char **end);
/*
* Hexdump a buffer to a file. An optional string prefix is added to every line
*/
void qemu_hexdump(const char *buf, FILE *fp, const char *prefix, size_t size);
/* vector definitions */
#ifdef __ALTIVEC__
#include <altivec.h>
/* The altivec.h header says we're allowed to undef these for
* C++ compatibility. Here we don't care about C++, but we
* undef them anyway to avoid namespace pollution.
*/
#undef vector
#undef pixel
#undef bool
#define VECTYPE __vector unsigned char
#define SPLAT(p) vec_splat(vec_ld(0, p), 0)
#define ALL_EQ(v1, v2) vec_all_eq(v1, v2)
/* altivec.h may redefine the bool macro as vector type.
* Reset it to POSIX semantics. */
#define bool _Bool
#elif defined __SSE2__
#include <emmintrin.h>
#define VECTYPE __m128i
#define SPLAT(p) _mm_set1_epi8(*(p))
#define ALL_EQ(v1, v2) (_mm_movemask_epi8(_mm_cmpeq_epi8(v1, v2)) == 0xFFFF)
#else
#define VECTYPE unsigned long
#define SPLAT(p) (*(p) * (~0UL / 255))
#define ALL_EQ(v1, v2) ((v1) == (v2))
#endif
#define BUFFER_FIND_NONZERO_OFFSET_UNROLL_FACTOR 8
static inline bool
can_use_buffer_find_nonzero_offset(const void *buf, size_t len)
{
return (len % (BUFFER_FIND_NONZERO_OFFSET_UNROLL_FACTOR
* sizeof(VECTYPE)) == 0
&& ((uintptr_t) buf) % sizeof(VECTYPE) == 0);
}
size_t buffer_find_nonzero_offset(const void *buf, size_t len);
/*
* helper to parse debug environment variables
*/
int parse_debug_env(const char *name, int max, int initial);
#endif
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