virerror.h

/*
 * virerror.h: error handling and reporting code for libvirt
 *
 * Copyright (C) 2006-2014 Red Hat, Inc.
 *
 * 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, see
 * <http://www.gnu.org/licenses/>.
 *
 */

#ifndef LIBVIRT_VIRERROR_H
# define LIBVIRT_VIRERROR_H

# include "internal.h"
# include "virautoclean.h"

# define VIR_ERROR_MAX_LENGTH 1024

extern virErrorFunc virErrorHandler;
extern void *virUserData;

int virErrorInitialize(void);
void virRaiseErrorFull(const char *filename,
                       const char *funcname,
                       size_t linenr,
                       int domain,
                       int code,
                       virErrorLevel level,
                       const char *str1,
                       const char *str2,
                       const char *str3,
                       int int1,
                       int int2,
                       const char *fmt, ...)
    ATTRIBUTE_FMT_PRINTF(12, 13);

void virRaiseErrorObject(const char *filename,
                         const char *funcname,
                         size_t linenr,
                         virErrorPtr err);

void virReportErrorHelper(int domcode, int errcode,
                          const char *filename,
                          const char *funcname,
                          size_t linenr,
                          const char *fmt, ...)
  ATTRIBUTE_FMT_PRINTF(6, 7);

void virReportSystemErrorFull(int domcode,
                              int theerrno,
                              const char *filename,
                              const char *funcname,
                              size_t linenr,
                              const char *fmt, ...)
    ATTRIBUTE_FMT_PRINTF(6, 7);

# define virReportSystemError(theerrno, fmt,...) \
    virReportSystemErrorFull(VIR_FROM_THIS, \
                             (theerrno), \
                             __FILE__, __FUNCTION__, __LINE__, \
                             (fmt), __VA_ARGS__)

# define virReportInvalidNullArg(argname) \
    virRaiseErrorFull(__FILE__, __FUNCTION__, __LINE__, \
                      VIR_FROM_THIS, \
                      VIR_ERR_INVALID_ARG, \
                      VIR_ERR_ERROR, \
                      __FUNCTION__, \
                      #argname, \
                      NULL, \
                      0, 0, \
                      _("%s in %s must be NULL"), \
                      #argname, __FUNCTION__)
# define virReportInvalidNonNullArg(argname) \
    virRaiseErrorFull(__FILE__, __FUNCTION__, __LINE__, \
                      VIR_FROM_THIS, \
                      VIR_ERR_INVALID_ARG, \
                      VIR_ERR_ERROR, \
                      __FUNCTION__, \
                      #argname, \
                      NULL, \
                      0, 0, \
                      _("%s in %s must not be NULL"), \
                      #argname, __FUNCTION__)
# define virReportInvalidEmptyStringArg(argname) \
    virRaiseErrorFull(__FILE__, __FUNCTION__, __LINE__, \
                      VIR_FROM_THIS, \
                      VIR_ERR_INVALID_ARG, \
                      VIR_ERR_ERROR, \
                      __FUNCTION__, \
                      #argname, \
                      NULL, \
                      0, 0, \
                      _("string %s in %s must not be empty"), \
                      #argname, __FUNCTION__)
# define virReportInvalidPositiveArg(argname) \
    virRaiseErrorFull(__FILE__, __FUNCTION__, __LINE__, \
                      VIR_FROM_THIS, \
                      VIR_ERR_INVALID_ARG, \
                      VIR_ERR_ERROR, \
                      __FUNCTION__, \
                      #argname, \
                      NULL, \
                      0, 0, \
                      _("%s in %s must be greater than zero"), \
                      #argname, __FUNCTION__)
# define virReportInvalidNonZeroArg(argname) \
    virRaiseErrorFull(__FILE__, __FUNCTION__, __LINE__, \
                      VIR_FROM_THIS, \
                      VIR_ERR_INVALID_ARG, \
                      VIR_ERR_ERROR, \
                      __FUNCTION__, \
                      #argname, \
                      NULL, \
                      0, 0, \
                      _("%s in %s must not be zero"), \
                      #argname, __FUNCTION__)
# define virReportInvalidZeroArg(argname) \
    virRaiseErrorFull(__FILE__, __FUNCTION__, __LINE__, \
                      VIR_FROM_THIS, \
                      VIR_ERR_INVALID_ARG, \
                      VIR_ERR_ERROR, \
                      __FUNCTION__, \
                      #argname, \
                      NULL, \
                      0, 0, \
                      _("%s in %s must be zero"), \
                      #argname, __FUNCTION__)
# define virReportInvalidNonNegativeArg(argname) \
    virRaiseErrorFull(__FILE__, __FUNCTION__, __LINE__, \
                      VIR_FROM_THIS, \
                      VIR_ERR_INVALID_ARG, \
                      VIR_ERR_ERROR, \
                      __FUNCTION__, \
                      #argname, \
                      NULL, \
                      0, 0, \
                      _("%s in %s must be zero or greater"), \
                      #argname, __FUNCTION__)
# define virReportInvalidArg(argname, fmt, ...) \
    virRaiseErrorFull(__FILE__, __FUNCTION__, __LINE__, \
                      VIR_FROM_THIS, \
                      VIR_ERR_INVALID_ARG, \
                      VIR_ERR_ERROR, \
                      __FUNCTION__, \
                      #argname, \
                      NULL, \
                      0, 0, \
                      (fmt), __VA_ARGS__)

# define virReportUnsupportedError() \
    virReportErrorHelper(VIR_FROM_THIS, VIR_ERR_NO_SUPPORT, \
                         __FILE__, __FUNCTION__, __LINE__, __FUNCTION__)
# define virReportRestrictedError(...) \
    virReportErrorHelper(VIR_FROM_THIS, VIR_ERR_OPERATION_DENIED, \
                         __FILE__, __FUNCTION__, __LINE__, __VA_ARGS__)
/* The sizeof(...) comparison here is a hack to catch typos
 * in the name of the enum by triggering a compile error, as well
 * as detecting if you passed a typename that refers to a function
 * or struct type, instead of an enum. It should get optimized away
 * since sizeof() is known at compile time  */
# define virReportEnumRangeError(typname, value) \
    virReportErrorHelper(VIR_FROM_THIS, VIR_ERR_INTERNAL_ERROR, \
                         __FILE__, __FUNCTION__, __LINE__, \
                         "Unexpected enum value %d for %s", \
                         value, sizeof((typname)1) != 0 ? #typname : #typname);

void virReportOOMErrorFull(int domcode,
                           const char *filename,
                           const char *funcname,
                           size_t linenr);

# define virReportOOMError() \
    virReportOOMErrorFull(VIR_FROM_THIS, __FILE__, __FUNCTION__, __LINE__)

# define virReportError(code, ...) \
    virReportErrorHelper(VIR_FROM_THIS, code, __FILE__, \
                         __FUNCTION__, __LINE__, __VA_ARGS__)

# define virReportErrorObject(obj) \
    virRaiseErrorObject(__FILE__, __FUNCTION__, __LINE__, obj)

int virSetError(virErrorPtr newerr);
virErrorPtr virErrorCopyNew(virErrorPtr err);
void virDispatchError(virConnectPtr conn);
const char *virStrerror(int theerrno, char *errBuf, size_t errBufLen);

typedef int (*virErrorLogPriorityFunc)(virErrorPtr, int);
void virSetErrorLogPriorityFunc(virErrorLogPriorityFunc func);

void virErrorSetErrnoFromLastError(void);

bool virLastErrorIsSystemErrno(int errnum);

void virErrorPreserveLast(virErrorPtr *saveerr);
void virErrorRestore(virErrorPtr *savederr);

VIR_DEFINE_AUTOPTR_FUNC(virError, virFreeError);

#endif /* LIBVIRT_VIRERROR_H */