mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2024-11-02 19:31:18 +00:00
e352b16400
This patch exports KVM Host Power Management capabilities as XML so that higher-level systems management software can make use of these features available in the host. The script "pm-is-supported" (from pm-utils package) is run to discover if Suspend-to-RAM (S3) or Suspend-to-Disk (S4) is supported by the host. If either of them are supported, then a new tag "<power_management>" is introduced in the XML under the <host> tag. However in case the query to check for power management features succeeded, but the host does not support any such feature, then the XML will contain an empty <power_management/> tag. In the event that the PM query itself failed, the XML will not contain any "power_management" tag. To use this, new APIs could be implemented in libvirt to exploit power management features such as S3/S4.
278 lines
9.5 KiB
C
278 lines
9.5 KiB
C
/*
|
|
* utils.h: common, generic utility functions
|
|
*
|
|
* Copyright (C) 2010-2011 Red Hat, Inc.
|
|
* Copyright (C) 2006, 2007 Binary Karma
|
|
* Copyright (C) 2006 Shuveb Hussain
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
* File created Jul 18, 2007 - Shuveb Hussain <shuveb@binarykarma.com>
|
|
*/
|
|
|
|
#ifndef __VIR_UTIL_H__
|
|
# define __VIR_UTIL_H__
|
|
|
|
# include "verify.h"
|
|
# include "internal.h"
|
|
# include <unistd.h>
|
|
# include <sys/select.h>
|
|
# include <sys/types.h>
|
|
# include <stdarg.h>
|
|
|
|
# ifndef MIN
|
|
# define MIN(a, b) ((a) < (b) ? (a) : (b))
|
|
# endif
|
|
# ifndef MAX
|
|
# define MAX(a, b) ((a) > (b) ? (a) : (b))
|
|
# endif
|
|
|
|
ssize_t saferead(int fd, void *buf, size_t count) ATTRIBUTE_RETURN_CHECK;
|
|
ssize_t safewrite(int fd, const void *buf, size_t count)
|
|
ATTRIBUTE_RETURN_CHECK;
|
|
int safezero(int fd, off_t offset, off_t len)
|
|
ATTRIBUTE_RETURN_CHECK;
|
|
|
|
int virSetBlocking(int fd, bool blocking) ATTRIBUTE_RETURN_CHECK;
|
|
int virSetNonBlock(int fd) ATTRIBUTE_RETURN_CHECK;
|
|
int virSetInherit(int fd, bool inherit) ATTRIBUTE_RETURN_CHECK;
|
|
int virSetCloseExec(int fd) ATTRIBUTE_RETURN_CHECK;
|
|
|
|
int virPipeReadUntilEOF(int outfd, int errfd,
|
|
char **outbuf, char **errbuf);
|
|
|
|
int virSetUIDGID(uid_t uid, gid_t gid);
|
|
|
|
int virFileReadLimFD(int fd, int maxlen, char **buf) ATTRIBUTE_RETURN_CHECK;
|
|
|
|
int virFileReadAll(const char *path, int maxlen, char **buf) ATTRIBUTE_RETURN_CHECK;
|
|
|
|
int virFileWriteStr(const char *path, const char *str, mode_t mode)
|
|
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
|
|
|
|
int virFileMatchesNameSuffix(const char *file,
|
|
const char *name,
|
|
const char *suffix);
|
|
|
|
int virFileHasSuffix(const char *str,
|
|
const char *suffix);
|
|
|
|
int virFileStripSuffix(char *str,
|
|
const char *suffix) ATTRIBUTE_RETURN_CHECK;
|
|
|
|
int virFileLinkPointsTo(const char *checkLink,
|
|
const char *checkDest);
|
|
|
|
int virFileResolveLink(const char *linkpath,
|
|
char **resultpath) ATTRIBUTE_RETURN_CHECK;
|
|
|
|
int virFileIsLink(const char *linkpath)
|
|
ATTRIBUTE_NONNULL(1) ATTRIBUTE_RETURN_CHECK;
|
|
|
|
char *virFindFileInPath(const char *file);
|
|
|
|
bool virFileExists(const char *file) ATTRIBUTE_NONNULL(1);
|
|
bool virFileIsExecutable(const char *file) ATTRIBUTE_NONNULL(1);
|
|
|
|
char *virFileSanitizePath(const char *path);
|
|
|
|
enum {
|
|
VIR_FILE_OPEN_NONE = 0,
|
|
VIR_FILE_OPEN_AS_UID = (1 << 0),
|
|
VIR_FILE_OPEN_FORCE_PERMS = (1 << 1),
|
|
};
|
|
int virFileAccessibleAs(const char *path, int mode,
|
|
uid_t uid, gid_t gid)
|
|
ATTRIBUTE_NONNULL(1) ATTRIBUTE_RETURN_CHECK;
|
|
int virFileOpenAs(const char *path, int openflags, mode_t mode,
|
|
uid_t uid, gid_t gid,
|
|
unsigned int flags)
|
|
ATTRIBUTE_NONNULL(1) ATTRIBUTE_RETURN_CHECK;
|
|
|
|
enum {
|
|
VIR_DIR_CREATE_NONE = 0,
|
|
VIR_DIR_CREATE_AS_UID = (1 << 0),
|
|
VIR_DIR_CREATE_FORCE_PERMS = (1 << 1),
|
|
VIR_DIR_CREATE_ALLOW_EXIST = (1 << 2),
|
|
};
|
|
int virDirCreate(const char *path, mode_t mode, uid_t uid, gid_t gid,
|
|
unsigned int flags) ATTRIBUTE_RETURN_CHECK;
|
|
int virFileMakePath(const char *path) ATTRIBUTE_RETURN_CHECK;
|
|
|
|
char *virFileBuildPath(const char *dir,
|
|
const char *name,
|
|
const char *ext) ATTRIBUTE_RETURN_CHECK;
|
|
|
|
int virFileAbsPath(const char *path,
|
|
char **abspath) ATTRIBUTE_RETURN_CHECK;
|
|
|
|
int virFileOpenTty(int *ttymaster,
|
|
char **ttyName,
|
|
int rawmode);
|
|
|
|
char *virArgvToString(const char *const *argv);
|
|
|
|
int virStrToLong_i(char const *s,
|
|
char **end_ptr,
|
|
int base,
|
|
int *result);
|
|
|
|
int virStrToLong_ui(char const *s,
|
|
char **end_ptr,
|
|
int base,
|
|
unsigned int *result);
|
|
int virStrToLong_l(char const *s,
|
|
char **end_ptr,
|
|
int base,
|
|
long *result);
|
|
int virStrToLong_ul(char const *s,
|
|
char **end_ptr,
|
|
int base,
|
|
unsigned long *result);
|
|
int virStrToLong_ll(char const *s,
|
|
char **end_ptr,
|
|
int base,
|
|
long long *result);
|
|
int virStrToLong_ull(char const *s,
|
|
char **end_ptr,
|
|
int base,
|
|
unsigned long long *result);
|
|
int virStrToDouble(char const *s,
|
|
char **end_ptr,
|
|
double *result);
|
|
|
|
int virHexToBin(unsigned char c);
|
|
|
|
int virMacAddrCompare (const char *mac1, const char *mac2);
|
|
|
|
void virSkipSpaces(const char **str) ATTRIBUTE_NONNULL(1);
|
|
void virSkipSpacesAndBackslash(const char **str) ATTRIBUTE_NONNULL(1);
|
|
void virTrimSpaces(char *str, char **endp) ATTRIBUTE_NONNULL(1);
|
|
void virSkipSpacesBackwards(const char *str, char **endp)
|
|
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
|
|
|
|
int virParseNumber(const char **str);
|
|
int virParseVersionString(const char *str, unsigned long *version,
|
|
bool allowMissing);
|
|
int virAsprintf(char **strp, const char *fmt, ...)
|
|
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_FMT_PRINTF(2, 3);
|
|
int virVasprintf(char **strp, const char *fmt, va_list list)
|
|
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_FMT_PRINTF(2, 0);
|
|
char *virStrncpy(char *dest, const char *src, size_t n, size_t destbytes)
|
|
ATTRIBUTE_RETURN_CHECK;
|
|
char *virStrcpy(char *dest, const char *src, size_t destbytes)
|
|
ATTRIBUTE_RETURN_CHECK;
|
|
# define virStrcpyStatic(dest, src) virStrcpy((dest), (src), sizeof(dest))
|
|
|
|
# define VIR_MAC_BUFLEN 6
|
|
# define VIR_MAC_PREFIX_BUFLEN 3
|
|
# define VIR_MAC_STRING_BUFLEN VIR_MAC_BUFLEN * 3
|
|
|
|
int virParseMacAddr(const char* str,
|
|
unsigned char *addr) ATTRIBUTE_RETURN_CHECK;
|
|
void virFormatMacAddr(const unsigned char *addr,
|
|
char *str);
|
|
void virGenerateMacAddr(const unsigned char *prefix,
|
|
unsigned char *addr);
|
|
|
|
int virDiskNameToIndex(const char* str);
|
|
char *virIndexToDiskName(int idx, const char *prefix);
|
|
|
|
int virEnumFromString(const char *const*types,
|
|
unsigned int ntypes,
|
|
const char *type);
|
|
|
|
const char *virEnumToString(const char *const*types,
|
|
unsigned int ntypes,
|
|
int type);
|
|
|
|
# define VIR_ENUM_IMPL(name, lastVal, ...) \
|
|
static const char *const name ## TypeList[] = { __VA_ARGS__ }; \
|
|
verify(ARRAY_CARDINALITY(name ## TypeList) == lastVal); \
|
|
const char *name ## TypeToString(int type) { \
|
|
return virEnumToString(name ## TypeList, \
|
|
ARRAY_CARDINALITY(name ## TypeList), \
|
|
type); \
|
|
} \
|
|
int name ## TypeFromString(const char *type) { \
|
|
return virEnumFromString(name ## TypeList, \
|
|
ARRAY_CARDINALITY(name ## TypeList), \
|
|
type); \
|
|
}
|
|
|
|
# define VIR_ENUM_DECL(name) \
|
|
const char *name ## TypeToString(int type); \
|
|
int name ## TypeFromString(const char*type);
|
|
|
|
# ifndef HAVE_GETUID
|
|
static inline int getuid (void) { return 0; }
|
|
# endif
|
|
|
|
# ifndef HAVE_GETEUID
|
|
static inline int geteuid (void) { return 0; }
|
|
# endif
|
|
|
|
# ifndef HAVE_GETGID
|
|
static inline int getgid (void) { return 0; }
|
|
# endif
|
|
|
|
char *virGetHostname(virConnectPtr conn);
|
|
|
|
int virKillProcess(pid_t pid, int sig);
|
|
|
|
char *virGetUserDirectory(uid_t uid);
|
|
char *virGetUserName(uid_t uid);
|
|
int virGetUserID(const char *name,
|
|
uid_t *uid) ATTRIBUTE_RETURN_CHECK;
|
|
int virGetGroupID(const char *name,
|
|
gid_t *gid) ATTRIBUTE_RETURN_CHECK;
|
|
|
|
int virRandomInitialize(unsigned int seed) ATTRIBUTE_RETURN_CHECK;
|
|
int virRandom(int max);
|
|
|
|
char *virFileFindMountPoint(const char *type);
|
|
|
|
void virFileWaitForDevices(void);
|
|
|
|
# define virBuildPath(path, ...) virBuildPathInternal(path, __VA_ARGS__, NULL)
|
|
int virBuildPathInternal(char **path, ...) ATTRIBUTE_SENTINEL;
|
|
|
|
char *virTimestamp(void);
|
|
|
|
int virTimeMs(unsigned long long *ms) ATTRIBUTE_NONNULL(1);
|
|
|
|
bool virIsDevMapperDevice(const char *dev_name) ATTRIBUTE_NONNULL(1);
|
|
|
|
int virEmitXMLWarning(int fd,
|
|
const char *name,
|
|
const char *cmd) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3);
|
|
|
|
void virTypedParameterArrayClear(virTypedParameterPtr params, int nparams);
|
|
|
|
/* Power Management Capabilities of the host system */
|
|
|
|
enum virHostPMCapability {
|
|
VIR_HOST_PM_S3, /* Suspend-to-RAM */
|
|
VIR_HOST_PM_S4, /* Suspend-to-Disk */
|
|
|
|
VIR_HOST_PM_LAST
|
|
};
|
|
|
|
VIR_ENUM_DECL(virHostPMCapability)
|
|
|
|
int virGetPMCapabilities(unsigned int *);
|
|
|
|
#endif /* __VIR_UTIL_H__ */
|