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libvirt/src/util/virerror.c
Chen Hanxiao bb189c8e8c qemu: Introduce VIR_ERR_DEVICE_MISSING 
Add new error code to be able to allow consumers (such as Nova) to be
able to key of a specific error code rather than needing to search the
error message."

Signed-off-by: Chen Hanxiao <chenhanxiao@gmail.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
2018-02-01 07:17:01 -05:00

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/*
* virerror.c: error handling and reporting code for libvirt
*
* Copyright (C) 2006, 2008-2016 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/>.
*
* Author: Daniel Veillard <veillard@redhat.com>
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include "virerror.h"
#include "datatypes.h"
#include "virlog.h"
#include "viralloc.h"
#include "virthread.h"
#include "virutil.h"
#include "virstring.h"
VIR_LOG_INIT("util.error");
virThreadLocal virLastErr;
virErrorFunc virErrorHandler = NULL; /* global error handler */
void *virUserData = NULL; /* associated data */
virErrorLogPriorityFunc virErrorLogPriorityFilter = NULL;
static virLogPriority virErrorLevelPriority(virErrorLevel level)
{
switch (level) {
case VIR_ERR_NONE:
return VIR_LOG_INFO;
case VIR_ERR_WARNING:
return VIR_LOG_WARN;
case VIR_ERR_ERROR:
return VIR_LOG_ERROR;
}
return VIR_LOG_ERROR;
}
VIR_ENUM_DECL(virErrorDomain)
VIR_ENUM_IMPL(virErrorDomain, VIR_ERR_DOMAIN_LAST,
"", /* 0 */
"Xen Driver",
"Xen Daemon",
"Xen Store",
"S-Expression",
"XML Util", /* 5 */
"Domain",
"XML-RPC",
"Proxy Daemon",
"Config File",
"QEMU Driver", /* 10 */
"Network",
"Test Driver",
"Remote Driver",
"OpenVZ Driver",
"Xen XM Driver", /* 15 */
"Linux Statistics",
"LXC Driver",
"Storage Driver",
"Network Driver",
"Domain Config", /* 20 */
"User Mode Linux Driver",
"Node Device Driver",
"Xen Inotify Driver",
"Security Driver",
"VirtualBox Driver", /* 25 */
"Network Interface Driver",
"Open Nebula Driver",
"ESX Driver",
"Power Hypervisor Driver",
"Secrets Driver", /* 30 */
"CPU Driver",
"XenAPI Driver",
"Network Filter Driver",
"Lifecycle Hook",
"Domain Snapshot", /* 35 */
"Audit Utils",
"Sysinfo Utils",
"I/O Stream Utils",
"VMware Driver",
"Event Loop", /* 40 */
"Xen Light Driver",
"Lock Driver",
"Hyper-V Driver",
"Capabilities Utils",
"URI Utils", /* 45 */
"Authentication Utils",
"DBus Utils",
"Parallels Cloud Server",
"Device Config",
"SSH transport layer", /* 50 */
"Lock Space",
"Init control",
"Identity",
"Cgroup",
"Access Manager", /* 55 */
"Systemd",
"Bhyve",
"Crypto",
"Firewall",
"Polkit", /* 60 */
"Thread jobs",
"Admin Interface",
"Log Manager",
"Xen XL Config",
"Perf", /* 65 */
"Libssh transport layer",
"Resource control",
)
/*
* Internal helper that is called when a thread exits, to
* release the error object stored in the thread local
*/
static void
virLastErrFreeData(void *data)
{
virErrorPtr err = data;
if (!err)
return;
virResetError(err);
VIR_FREE(err);
}
/**
* virErrorInitialize:
*
* Initialize the error data (per thread)
*
* Returns 0 in case of success, -1 in case of failure.
*/
int
virErrorInitialize(void)
{
return virThreadLocalInit(&virLastErr, virLastErrFreeData);
}
/*
* Internal helper to ensure a generic error code is stored
* in case where API returns failure, but forgot to set an
* error
*/
static void
virErrorGenericFailure(virErrorPtr err)
{
err->code = VIR_ERR_INTERNAL_ERROR;
err->domain = VIR_FROM_NONE;
err->level = VIR_ERR_ERROR;
ignore_value(VIR_STRDUP_QUIET(err->message,
_("An error occurred, but the cause is unknown")));
}
/*
* Internal helper to perform a deep copy of an error
*/
static int
virCopyError(virErrorPtr from,
virErrorPtr to)
{
int ret = 0;
if (!to)
return 0;
virResetError(to);
if (!from)
return 0;
to->code = from->code;
to->domain = from->domain;
to->level = from->level;
if (VIR_STRDUP_QUIET(to->message, from->message) < 0)
ret = -1;
if (VIR_STRDUP_QUIET(to->str1, from->str1) < 0)
ret = -1;
if (VIR_STRDUP_QUIET(to->str2, from->str2) < 0)
ret = -1;
if (VIR_STRDUP_QUIET(to->str3, from->str3) < 0)
ret = -1;
to->int1 = from->int1;
to->int2 = from->int2;
/*
* Deliberately not setting 'conn', 'dom', 'net' references
*/
return ret;
}
virErrorPtr
virErrorCopyNew(virErrorPtr err)
{
virErrorPtr ret;
if (VIR_ALLOC_QUIET(ret) < 0)
return NULL;
if (virCopyError(err, ret) < 0)
VIR_FREE(ret);
return ret;
}
static virErrorPtr
virLastErrorObject(void)
{
virErrorPtr err;
err = virThreadLocalGet(&virLastErr);
if (!err) {
if (VIR_ALLOC_QUIET(err) < 0)
return NULL;
if (virThreadLocalSet(&virLastErr, err) < 0)
VIR_FREE(err);
}
return err;
}
/**
* virGetLastError:
*
* Provide a pointer to the last error caught at the library level
*
* The error object is kept in thread local storage, so separate
* threads can safely access this concurrently.
*
* Returns a pointer to the last error or NULL if none occurred.
*/
virErrorPtr
virGetLastError(void)
{
virErrorPtr err = virLastErrorObject();
if (!err || err->code == VIR_ERR_OK)
return NULL;
return err;
}
/**
* virGetLastErrorMessage:
*
* Get the most recent error message
*
* Returns the most recent error message string in this
* thread, or a generic message if none is set
*/
const char *
virGetLastErrorMessage(void)
{
virErrorPtr err = virLastErrorObject();
if (err && err->code == VIR_ERR_OK)
return _("no error");
if (!err || !err->message)
return _("unknown error");
return err->message;
}
/**
* virSetError:
* @newerr: previously saved error object
*
* Set the current error from a previously saved error object
*
* Can be used to re-set an old error, which may have been squashed by
* other functions (like cleanup routines).
*
* Returns 0 on success, -1 on failure. Leaves errno unchanged.
*/
int
virSetError(virErrorPtr newerr)
{
virErrorPtr err;
int saved_errno = errno;
int ret = -1;
err = virLastErrorObject();
if (!err)
goto cleanup;
virResetError(err);
ret = virCopyError(newerr, err);
cleanup:
errno = saved_errno;
return ret;
}
/**
* virCopyLastError:
* @to: target to receive the copy
*
* Copy the content of the last error caught at the library level
*
* The error object is kept in thread local storage, so separate
* threads can safely access this concurrently.
*
* One will need to free the result with virResetError()
*
* Returns 0 if no error was found and the error code otherwise and -1 in case
* of parameter error.
*/
int
virCopyLastError(virErrorPtr to)
{
virErrorPtr err = virLastErrorObject();
/* We can't guarantee caller has initialized it to zero */
memset(to, 0, sizeof(*to));
if (err)
virCopyError(err, to);
else
virResetError(to);
return to->code;
}
/**
* virSaveLastError:
*
* Save the last error into a new error object. On success, errno is
* unchanged; on failure, errno is ENOMEM.
*
* Returns a pointer to the copied error or NULL if allocation failed.
* It is the caller's responsibility to free the error with
* virFreeError().
*/
virErrorPtr
virSaveLastError(void)
{
virErrorPtr to;
int saved_errno = errno;
if (VIR_ALLOC_QUIET(to) < 0)
return NULL;
virCopyLastError(to);
errno = saved_errno;
return to;
}
/**
* virErrorPreserveLast:
* @saveerr: pointer to virErrorPtr for storing last error object
*
* Preserves the currently set last error (for the thread) into @saveerr so that
* it can be restored via virErrorRestore(). @saveerr must be passed to
* virErrorRestore()
*/
void
virErrorPreserveLast(virErrorPtr *saveerr)
{
int saved_errno = errno;
virErrorPtr lasterr = virGetLastError();
*saveerr = NULL;
if (lasterr)
*saveerr = virErrorCopyNew(lasterr);
errno = saved_errno;
}
/**
* virErrorRestore:
* @savederr: error object holding saved error
*
* Restores the error passed via @savederr and clears associated memory.
*/
void
virErrorRestore(virErrorPtr *savederr)
{
int saved_errno = errno;
if (!*savederr)
return;
virSetError(*savederr);
virFreeError(*savederr);
*savederr = NULL;
errno = saved_errno;
}
/**
* virResetError:
* @err: pointer to the virError to clean up
*
* Reset the error being pointed to
*/
void
virResetError(virErrorPtr err)
{
if (err == NULL)
return;
VIR_FREE(err->message);
VIR_FREE(err->str1);
VIR_FREE(err->str2);
VIR_FREE(err->str3);
memset(err, 0, sizeof(virError));
}
/**
* virFreeError:
* @err: error to free
*
* Resets and frees the given error.
*/
void
virFreeError(virErrorPtr err)
{
virResetError(err);
VIR_FREE(err);
}
/**
* virResetLastError:
*
* Reset the last error caught at the library level.
*
* The error object is kept in thread local storage, so separate
* threads can safely access this concurrently, only resetting
* their own error object.
*/
void
virResetLastError(void)
{
virErrorPtr err = virLastErrorObject();
if (err)
virResetError(err);
}
/**
* virConnGetLastError:
* @conn: pointer to the hypervisor connection
*
* Provide a pointer to the last error caught on that connection
*
* This method is not protected against access from multiple
* threads. In a multi-threaded application, always use the
* global virGetLastError() API which is backed by thread
* local storage.
*
* If the connection object was discovered to be invalid by
* an API call, then the error will be reported against the
* global error object.
*
* Since 0.6.0, all errors reported in the per-connection object
* are also duplicated in the global error object. As such an
* application can always use virGetLastError(). This method
* remains for backwards compatibility.
*
* Returns a pointer to the last error or NULL if none occurred.
*/
virErrorPtr
virConnGetLastError(virConnectPtr conn)
{
if (conn == NULL)
return NULL;
return &conn->err;
}
/**
* virConnCopyLastError:
* @conn: pointer to the hypervisor connection
* @to: target to receive the copy
*
* Copy the content of the last error caught on that connection
*
* This method is not protected against access from multiple
* threads. In a multi-threaded application, always use the
* global virGetLastError() API which is backed by thread
* local storage.
*
* If the connection object was discovered to be invalid by
* an API call, then the error will be reported against the
* global error object.
*
* Since 0.6.0, all errors reported in the per-connection object
* are also duplicated in the global error object. As such an
* application can always use virGetLastError(). This method
* remains for backwards compatibility.
*
* One will need to free the result with virResetError()
*
* Returns 0 if no error was found and the error code otherwise and -1 in case
* of parameter error.
*/
int
virConnCopyLastError(virConnectPtr conn, virErrorPtr to)
{
/* We can't guarantee caller has initialized it to zero */
memset(to, 0, sizeof(*to));
if (conn == NULL)
return -1;
virObjectLock(conn);
if (conn->err.code == VIR_ERR_OK)
virResetError(to);
else
virCopyError(&conn->err, to);
virObjectUnlock(conn);
return to->code;
}
/**
* virConnResetLastError:
* @conn: pointer to the hypervisor connection
*
* The error object is kept in thread local storage, so separate
* threads can safely access this concurrently.
*
* Reset the last error caught on that connection
*/
void
virConnResetLastError(virConnectPtr conn)
{
if (conn == NULL)
return;
virObjectLock(conn);
virResetError(&conn->err);
virObjectUnlock(conn);
}
/**
* virSetErrorFunc:
* @userData: pointer to the user data provided in the handler callback
* @handler: the function to get called in case of error or NULL
*
* Set a library global error handling function, if @handler is NULL,
* it will reset to default printing on stderr. The error raised there
* are those for which no handler at the connection level could caught.
*/
void
virSetErrorFunc(void *userData, virErrorFunc handler)
{
virErrorHandler = handler;
virUserData = userData;
}
/**
* virConnSetErrorFunc:
* @conn: pointer to the hypervisor connection
* @userData: pointer to the user data provided in the handler callback
* @handler: the function to get called in case of error or NULL
*
* Set a connection error handling function, if @handler is NULL
* it will reset to default which is to pass error back to the global
* library handler.
*/
void
virConnSetErrorFunc(virConnectPtr conn, void *userData,
virErrorFunc handler)
{
if (conn == NULL)
return;
virObjectLock(conn);
conn->handler = handler;
conn->userData = userData;
virObjectUnlock(conn);
}
/**
* virDefaultErrorFunc:
* @err: pointer to the error.
*
* Default routine reporting an error to stderr.
*/
void
virDefaultErrorFunc(virErrorPtr err)
{
const char *lvl = "", *dom = "", *domain = "", *network = "";
int len;
if ((err == NULL) || (err->code == VIR_ERR_OK))
return;
switch (err->level) {
case VIR_ERR_NONE:
lvl = "";
break;
case VIR_ERR_WARNING:
lvl = _("warning");
break;
case VIR_ERR_ERROR:
lvl = _("error");
break;
}
dom = virErrorDomainTypeToString(err->domain);
if (!dom)
dom = "Unknown";
if ((err->dom != NULL) && (err->code != VIR_ERR_INVALID_DOMAIN)) {
domain = err->dom->name;
} else if ((err->net != NULL) && (err->code != VIR_ERR_INVALID_NETWORK)) {
network = err->net->name;
}
len = strlen(err->message);
if ((err->domain == VIR_FROM_XML) && (err->code == VIR_ERR_XML_DETAIL) &&
(err->int1 != 0))
fprintf(stderr, "libvirt: %s %s %s%s: line %d: %s",
dom, lvl, domain, network, err->int1, err->message);
else if ((len == 0) || (err->message[len - 1] != '\n'))
fprintf(stderr, "libvirt: %s %s %s%s: %s\n",
dom, lvl, domain, network, err->message);
else
fprintf(stderr, "libvirt: %s %s %s%s: %s",
dom, lvl, domain, network, err->message);
}
/**
* virDispatchError:
* @conn: pointer to the hypervisor connection
*
* Internal helper to do final stage of error
* reporting in public APIs.
*
* - Copy the global error to per-connection error if needed
* - Set a generic error message if none is already set
* - Invoke the error callback functions
*/
void
virDispatchError(virConnectPtr conn)
{
virErrorPtr err = virLastErrorObject();
virErrorFunc handler = virErrorHandler;
void *userData = virUserData;
/* Can only happen on OOM. */
if (!err)
return;
/* Set a generic error message if none is already set */
if (err->code == VIR_ERR_OK)
virErrorGenericFailure(err);
/* Copy the global error to per-connection error if needed */
if (conn) {
virObjectLock(conn);
virCopyError(err, &conn->err);
if (conn->handler != NULL) {
handler = conn->handler;
userData = conn->userData;
}
virObjectUnlock(conn);
}
/* Invoke the error callback functions */
if (handler != NULL) {
(handler)(userData, err);
} else {
virDefaultErrorFunc(err);
}
}
/*
* Reports an error through the logging subsystem
*/
static
void virRaiseErrorLog(const char *filename,
const char *funcname,
size_t linenr,
virErrorPtr err,
virLogMetadata *meta)
{
int priority;
/*
* Hook up the error or warning to the logging facility
*/
priority = virErrorLevelPriority(err->level);
if (virErrorLogPriorityFilter)
priority = virErrorLogPriorityFilter(err, priority);
/* We don't want to pollute stderr if no logging outputs
* are explicitly requested by the user, since the default
* error function already pollutes stderr and most apps
* hate & thus disable that too. If the daemon has set
* a priority filter though, we should always forward
* all errors to the logging code.
*/
if (virLogGetNbOutputs() > 0 ||
virErrorLogPriorityFilter)
virLogMessage(&virLogSelf,
priority,
filename, linenr, funcname,
meta, "%s", err->message);
}
/**
* virRaiseErrorFull:
* @filename: filename where error was raised
* @funcname: function name where error was raised
* @linenr: line number where error was raised
* @domain: the virErrorDomain indicating where it's coming from
* @code: the virErrorNumber code for the error
* @level: the virErrorLevel for the error
* @str1: extra string info
* @str2: extra string info
* @str3: extra string info
* @int1: extra int info
* @int2: extra int info
* @fmt: the message to display/transmit
* @...: extra parameters for the message display
*
* Internal routine called when an error is detected. It will raise it
* immediately if a callback is found and store it for later handling.
*/
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, ...)
{
int save_errno = errno;
virErrorPtr to;
char *str;
virLogMetadata meta[] = {
{ .key = "LIBVIRT_DOMAIN", .s = NULL, .iv = domain },
{ .key = "LIBVIRT_CODE", .s = NULL, .iv = code },
{ .key = NULL },
};
/*
* All errors are recorded in thread local storage
* For compatibility, public API calls will copy them
* to the per-connection error object when necessary
*/
to = virLastErrorObject();
if (!to) {
errno = save_errno;
return; /* Hit OOM allocating thread error object, sod all we can do now */
}
virResetError(to);
if (code == VIR_ERR_OK) {
errno = save_errno;
return;
}
/*
* formats the message; drop message on OOM situations
*/
if (fmt == NULL) {
ignore_value(VIR_STRDUP_QUIET(str, _("No error message provided")));
} else {
va_list ap;
va_start(ap, fmt);
ignore_value(virVasprintfQuiet(&str, fmt, ap));
va_end(ap);
}
/*
* Save the information about the error
*/
/*
* Deliberately not setting conn, dom & net fields since
* they're utterly unsafe
*/
to->domain = domain;
to->code = code;
to->message = str;
to->level = level;
ignore_value(VIR_STRDUP_QUIET(to->str1, str1));
ignore_value(VIR_STRDUP_QUIET(to->str2, str2));
ignore_value(VIR_STRDUP_QUIET(to->str3, str3));
to->int1 = int1;
to->int2 = int2;
virRaiseErrorLog(filename, funcname, linenr,
to, meta);
errno = save_errno;
}
/**
* virRaiseErrorObject:
* @filename: filename where error was raised
* @funcname: function name where error was raised
* @linenr: line number where error was raised
* @newerr: the error object to report
*
* Sets the thread local error object to be a copy of
* @newerr and logs the error
*
* This is like virRaiseErrorFull, except that it accepts the
* error information via a pre-filled virErrorPtr object
*
* This is like virSetError, except that it will trigger the
* logging callbacks.
*
* The caller must clear the @newerr instance afterwards, since
* it will be copied into the thread local error.
*/
void virRaiseErrorObject(const char *filename,
const char *funcname,
size_t linenr,
virErrorPtr newerr)
{
int saved_errno = errno;
virErrorPtr err;
virLogMetadata meta[] = {
{ .key = "LIBVIRT_DOMAIN", .s = NULL, .iv = newerr->domain },
{ .key = "LIBVIRT_CODE", .s = NULL, .iv = newerr->code },
{ .key = NULL },
};
err = virLastErrorObject();
if (!err)
goto cleanup;
virResetError(err);
virCopyError(newerr, err);
virRaiseErrorLog(filename, funcname, linenr,
err, meta);
cleanup:
errno = saved_errno;
}
/**
* virErrorMsg:
* @error: the virErrorNumber
* @info: usually the first parameter string
*
* Internal routine to get the message associated to an error raised
* from the library
*
* Returns the constant string associated to @error
*/
static const char *
virErrorMsg(virErrorNumber error, const char *info)
{
const char *errmsg = NULL;
switch (error) {
case VIR_ERR_OK:
return NULL;
case VIR_ERR_INTERNAL_ERROR:
if (info != NULL)
errmsg = _("internal error: %s");
else
errmsg = _("internal error");
break;
case VIR_ERR_NO_MEMORY:
errmsg = _("out of memory");
break;
case VIR_ERR_NO_SUPPORT:
if (info == NULL)
errmsg = _("this function is not supported by the connection driver");
else
errmsg = _("this function is not supported by the connection driver: %s");
break;
case VIR_ERR_NO_CONNECT:
if (info == NULL)
errmsg = _("no connection driver available");
else
errmsg = _("no connection driver available for %s");
break;
case VIR_ERR_INVALID_CONN:
if (info == NULL)
errmsg = _("invalid connection pointer in");
else
errmsg = _("invalid connection pointer in %s");
break;
case VIR_ERR_INVALID_DOMAIN:
if (info == NULL)
errmsg = _("invalid domain pointer in");
else
errmsg = _("invalid domain pointer in %s");
break;
case VIR_ERR_INVALID_ARG:
if (info == NULL)
errmsg = _("invalid argument");
else
errmsg = _("invalid argument: %s");
break;
case VIR_ERR_OPERATION_FAILED:
if (info != NULL)
errmsg = _("operation failed: %s");
else
errmsg = _("operation failed");
break;
case VIR_ERR_GET_FAILED:
if (info != NULL)
errmsg = _("GET operation failed: %s");
else
errmsg = _("GET operation failed");
break;
case VIR_ERR_POST_FAILED:
if (info != NULL)
errmsg = _("POST operation failed: %s");
else
errmsg = _("POST operation failed");
break;
case VIR_ERR_HTTP_ERROR:
errmsg = _("got unknown HTTP error code %d");
break;
case VIR_ERR_UNKNOWN_HOST:
if (info != NULL)
errmsg = _("unknown host %s");
else
errmsg = _("unknown host");
break;
case VIR_ERR_SEXPR_SERIAL:
if (info != NULL)
errmsg = _("failed to serialize S-Expr: %s");
else
errmsg = _("failed to serialize S-Expr");
break;
case VIR_ERR_NO_XEN:
if (info == NULL)
errmsg = _("could not use Xen hypervisor entry");
else
errmsg = _("could not use Xen hypervisor entry %s");
break;
case VIR_ERR_NO_XENSTORE:
if (info == NULL)
errmsg = _("could not connect to Xen Store");
else
errmsg = _("could not connect to Xen Store %s");
break;
case VIR_ERR_XEN_CALL:
errmsg = _("failed Xen syscall %s");
break;
case VIR_ERR_OS_TYPE:
if (info == NULL)
errmsg = _("unknown OS type");
else
errmsg = _("unknown OS type %s");
break;
case VIR_ERR_NO_KERNEL:
errmsg = _("missing kernel information");
break;
case VIR_ERR_NO_ROOT:
if (info == NULL)
errmsg = _("missing root device information");
else
errmsg = _("missing root device information in %s");
break;
case VIR_ERR_NO_SOURCE:
if (info == NULL)
errmsg = _("missing source information for device");
else
errmsg = _("missing source information for device %s");
break;
case VIR_ERR_NO_TARGET:
if (info == NULL)
errmsg = _("missing target information for device");
else
errmsg = _("missing target information for device %s");
break;
case VIR_ERR_NO_NAME:
if (info == NULL)
errmsg = _("missing name information");
else
errmsg = _("missing name information in %s");
break;
case VIR_ERR_NO_OS:
if (info == NULL)
errmsg = _("missing operating system information");
else
errmsg = _("missing operating system information for %s");
break;
case VIR_ERR_NO_DEVICE:
if (info == NULL)
errmsg = _("missing devices information");
else
errmsg = _("missing devices information for %s");
break;
case VIR_ERR_DRIVER_FULL:
if (info == NULL)
errmsg = _("too many drivers registered");
else
errmsg = _("too many drivers registered in %s");
break;
case VIR_ERR_CALL_FAILED: /* DEPRECATED, use VIR_ERR_NO_SUPPORT */
if (info == NULL)
errmsg = _("library call failed, possibly not supported");
else
errmsg = _("library call %s failed, possibly not supported");
break;
case VIR_ERR_XML_ERROR:
if (info == NULL)
errmsg = _("XML description is invalid or not well formed");
else
errmsg = _("XML error: %s");
break;
case VIR_ERR_DOM_EXIST:
if (info == NULL)
errmsg = _("this domain exists already");
else
errmsg = _("domain %s exists already");
break;
case VIR_ERR_OPERATION_DENIED:
if (info == NULL)
errmsg = _("operation forbidden for read only access");
else
errmsg = _("operation forbidden: %s");
break;
case VIR_ERR_OPEN_FAILED:
if (info == NULL)
errmsg = _("failed to open configuration file for reading");
else
errmsg = _("failed to open %s for reading");
break;
case VIR_ERR_READ_FAILED:
if (info == NULL)
errmsg = _("failed to read configuration file");
else
errmsg = _("failed to read configuration file %s");
break;
case VIR_ERR_PARSE_FAILED:
if (info == NULL)
errmsg = _("failed to parse configuration file");
else
errmsg = _("failed to parse configuration file %s");
break;
case VIR_ERR_CONF_SYNTAX:
if (info == NULL)
errmsg = _("configuration file syntax error");
else
errmsg = _("configuration file syntax error: %s");
break;
case VIR_ERR_WRITE_FAILED:
if (info == NULL)
errmsg = _("failed to write configuration file");
else
errmsg = _("failed to write configuration file: %s");
break;
case VIR_ERR_XML_DETAIL:
if (info == NULL)
errmsg = _("parser error");
else
errmsg = "%s";
break;
case VIR_ERR_INVALID_NETWORK:
if (info == NULL)
errmsg = _("invalid network pointer in");
else
errmsg = _("invalid network pointer in %s");
break;
case VIR_ERR_NETWORK_EXIST:
if (info == NULL)
errmsg = _("this network exists already");
else
errmsg = _("network %s exists already");
break;
case VIR_ERR_SYSTEM_ERROR:
if (info == NULL)
errmsg = _("system call error");
else
errmsg = "%s";
break;
case VIR_ERR_RPC:
if (info == NULL)
errmsg = _("RPC error");
else
errmsg = "%s";
break;
case VIR_ERR_GNUTLS_ERROR:
if (info == NULL)
errmsg = _("GNUTLS call error");
else
errmsg = "%s";
break;
case VIR_WAR_NO_NETWORK:
if (info == NULL)
errmsg = _("Failed to find the network");
else
errmsg = _("Failed to find the network: %s");
break;
case VIR_ERR_NO_DOMAIN:
if (info == NULL)
errmsg = _("Domain not found");
else
errmsg = _("Domain not found: %s");
break;
case VIR_ERR_NO_NETWORK:
if (info == NULL)
errmsg = _("Network not found");
else
errmsg = _("Network not found: %s");
break;
case VIR_ERR_INVALID_MAC:
if (info == NULL)
errmsg = _("invalid MAC address");
else
errmsg = _("invalid MAC address: %s");
break;
case VIR_ERR_AUTH_FAILED:
if (info == NULL)
errmsg = _("authentication failed");
else
errmsg = _("authentication failed: %s");
break;
case VIR_ERR_AUTH_CANCELLED:
if (info == NULL)
errmsg = _("authentication cancelled");
else
errmsg = _("authentication cancelled: %s");
break;
case VIR_ERR_AUTH_UNAVAILABLE:
if (info == NULL)
errmsg = _("authentication unavailable");
else
errmsg = _("authentication unavailable: %s");
break;
case VIR_ERR_NO_STORAGE_POOL:
if (info == NULL)
errmsg = _("Storage pool not found");
else
errmsg = _("Storage pool not found: %s");
break;
case VIR_ERR_NO_STORAGE_VOL:
if (info == NULL)
errmsg = _("Storage volume not found");
else
errmsg = _("Storage volume not found: %s");
break;
case VIR_ERR_STORAGE_VOL_EXIST:
if (info == NULL)
errmsg = _("this storage volume exists already");
else
errmsg = _("storage volume %s exists already");
break;
case VIR_ERR_STORAGE_PROBE_FAILED:
if (info == NULL)
errmsg = _("Storage pool probe failed");
else
errmsg = _("Storage pool probe failed: %s");
break;
case VIR_ERR_STORAGE_POOL_BUILT:
if (info == NULL)
errmsg = _("Storage pool already built");
else
errmsg = _("Storage pool already built: %s");
break;
case VIR_ERR_INVALID_STORAGE_POOL:
if (info == NULL)
errmsg = _("invalid storage pool pointer in");
else
errmsg = _("invalid storage pool pointer in %s");
break;
case VIR_ERR_INVALID_STORAGE_VOL:
if (info == NULL)
errmsg = _("invalid storage volume pointer in");
else
errmsg = _("invalid storage volume pointer in %s");
break;
case VIR_WAR_NO_STORAGE:
if (info == NULL)
errmsg = _("Failed to find a storage driver");
else
errmsg = _("Failed to find a storage driver: %s");
break;
case VIR_WAR_NO_NODE:
if (info == NULL)
errmsg = _("Failed to find a node driver");
else
errmsg = _("Failed to find a node driver: %s");
break;
case VIR_ERR_INVALID_NODE_DEVICE:
if (info == NULL)
errmsg = _("invalid node device pointer");
else
errmsg = _("invalid node device pointer in %s");
break;
case VIR_ERR_NO_NODE_DEVICE:
if (info == NULL)
errmsg = _("Node device not found");
else
errmsg = _("Node device not found: %s");
break;
case VIR_ERR_NO_SECURITY_MODEL:
if (info == NULL)
errmsg = _("Security model not found");
else
errmsg = _("Security model not found: %s");
break;
case VIR_ERR_OPERATION_INVALID:
if (info == NULL)
errmsg = _("Requested operation is not valid");
else
errmsg = _("Requested operation is not valid: %s");
break;
case VIR_WAR_NO_INTERFACE:
if (info == NULL)
errmsg = _("Failed to find the interface");
else
errmsg = _("Failed to find the interface: %s");
break;
case VIR_ERR_NO_INTERFACE:
if (info == NULL)
errmsg = _("Interface not found");
else
errmsg = _("Interface not found: %s");
break;
case VIR_ERR_INVALID_INTERFACE:
if (info == NULL)
errmsg = _("invalid interface pointer in");
else
errmsg = _("invalid interface pointer in %s");
break;
case VIR_ERR_MULTIPLE_INTERFACES:
if (info == NULL)
errmsg = _("multiple matching interfaces found");
else
errmsg = _("multiple matching interfaces found: %s");
break;
case VIR_WAR_NO_SECRET:
if (info == NULL)
errmsg = _("Failed to find a secret storage driver");
else
errmsg = _("Failed to find a secret storage driver: %s");
break;
case VIR_ERR_INVALID_SECRET:
if (info == NULL)
errmsg = _("Invalid secret");
else
errmsg = _("Invalid secret: %s");
break;
case VIR_ERR_NO_SECRET:
if (info == NULL)
errmsg = _("Secret not found");
else
errmsg = _("Secret not found: %s");
break;
case VIR_WAR_NO_NWFILTER:
if (info == NULL)
errmsg = _("Failed to start the nwfilter driver");
else
errmsg = _("Failed to start the nwfilter driver: %s");
break;
case VIR_ERR_INVALID_NWFILTER:
if (info == NULL)
errmsg = _("Invalid network filter");
else
errmsg = _("Invalid network filter: %s");
break;
case VIR_ERR_NO_NWFILTER:
if (info == NULL)
errmsg = _("Network filter not found");
else
errmsg = _("Network filter not found: %s");
break;
case VIR_ERR_BUILD_FIREWALL:
if (info == NULL)
errmsg = _("Error while building firewall");
else
errmsg = _("Error while building firewall: %s");
break;
case VIR_ERR_CONFIG_UNSUPPORTED:
if (info == NULL)
errmsg = _("unsupported configuration");
else
errmsg = _("unsupported configuration: %s");
break;
case VIR_ERR_OPERATION_TIMEOUT:
if (info == NULL)
errmsg = _("Timed out during operation");
else
errmsg = _("Timed out during operation: %s");
break;
case VIR_ERR_MIGRATE_PERSIST_FAILED:
if (info == NULL)
errmsg = _("Failed to make domain persistent after migration");
else
errmsg = _("Failed to make domain persistent after migration: %s");
break;
case VIR_ERR_HOOK_SCRIPT_FAILED:
if (info == NULL)
errmsg = _("Hook script execution failed");
else
errmsg = _("Hook script execution failed: %s");
break;
case VIR_ERR_INVALID_DOMAIN_SNAPSHOT:
if (info == NULL)
errmsg = _("Invalid snapshot");
else
errmsg = _("Invalid snapshot: %s");
break;
case VIR_ERR_NO_DOMAIN_SNAPSHOT:
if (info == NULL)
errmsg = _("Domain snapshot not found");
else
errmsg = _("Domain snapshot not found: %s");
break;
case VIR_ERR_INVALID_STREAM:
if (info == NULL)
errmsg = _("invalid stream pointer");
else
errmsg = _("invalid stream pointer in %s");
break;
case VIR_ERR_ARGUMENT_UNSUPPORTED:
if (info == NULL)
errmsg = _("argument unsupported");
else
errmsg = _("argument unsupported: %s");
break;
case VIR_ERR_SNAPSHOT_REVERT_RISKY:
if (info == NULL)
errmsg = _("revert requires force");
else
errmsg = _("revert requires force: %s");
break;
case VIR_ERR_OPERATION_ABORTED:
if (info == NULL)
errmsg = _("operation aborted");
else
errmsg = _("operation aborted: %s");
break;
case VIR_ERR_NO_DOMAIN_METADATA:
if (info == NULL)
errmsg = _("metadata not found");
else
errmsg = _("metadata not found: %s");
break;
case VIR_ERR_MIGRATE_UNSAFE:
if (!info)
errmsg = _("Unsafe migration");
else
errmsg = _("Unsafe migration: %s");
break;
case VIR_ERR_OVERFLOW:
if (!info)
errmsg = _("numerical overflow");
else
errmsg = _("numerical overflow: %s");
break;
case VIR_ERR_BLOCK_COPY_ACTIVE:
if (!info)
errmsg = _("block copy still active");
else
errmsg = _("block copy still active: %s");
break;
case VIR_ERR_OPERATION_UNSUPPORTED:
if (!info)
errmsg = _("Operation not supported");
else
errmsg = _("Operation not supported: %s");
break;
case VIR_ERR_SSH:
if (info == NULL)
errmsg = _("SSH transport error");
else
errmsg = _("SSH transport error: %s");
break;
case VIR_ERR_AGENT_UNRESPONSIVE:
if (info == NULL)
errmsg = _("Guest agent is not responding");
else
errmsg = _("Guest agent is not responding: %s");
break;
case VIR_ERR_RESOURCE_BUSY:
if (info == NULL)
errmsg = _("resource busy");
else
errmsg = _("resource busy: %s");
break;
case VIR_ERR_ACCESS_DENIED:
if (info == NULL)
errmsg = _("access denied");
else
errmsg = _("access denied: %s");
break;
case VIR_ERR_DBUS_SERVICE:
if (info == NULL)
errmsg = _("error from service");
else
errmsg = _("error from service: %s");
break;
case VIR_ERR_CPU_INCOMPATIBLE:
if (info == NULL)
errmsg = _("the CPU is incompatible with host CPU");
else
errmsg = _("the CPU is incompatible with host CPU: %s");
break;
case VIR_ERR_XML_INVALID_SCHEMA:
if (info == NULL)
errmsg = _("XML document failed to validate against schema");
else
errmsg = _("XML document failed to validate against schema: %s");
break;
case VIR_ERR_MIGRATE_FINISH_OK:
errmsg = _("migration successfully aborted");
break;
case VIR_ERR_NO_SERVER:
if (info == NULL)
errmsg = _("Server not found");
else
errmsg = _("Server not found: %s");
break;
case VIR_ERR_NO_CLIENT:
if (info == NULL)
errmsg = _("Client not found");
else
errmsg = _("Client not found: %s");
break;
case VIR_ERR_AGENT_UNSYNCED: /* DEPRECATED */
if (info == NULL)
errmsg = _("guest agent replied with wrong id to guest-sync command");
else
errmsg = _("guest agent replied with wrong id to guest-sync command: %s");
break;
case VIR_ERR_LIBSSH:
if (info == NULL)
errmsg = _("libssh transport error");
else
errmsg = _("libssh transport error: %s");
break;
case VIR_ERR_DEVICE_MISSING:
if (info == NULL)
errmsg = _("device not found");
else
errmsg = _("device not found: %s");
break;
}
return errmsg;
}
/**
* virReportErrorHelper:
*
* @domcode: the virErrorDomain indicating where it's coming from
* @errorcode: the virErrorNumber code for the error
* @filename: Source file error is dispatched from
* @funcname: Function error is dispatched from
* @linenr: Line number error is dispatched from
* @fmt: the format string
* @...: extra parameters for the message display
*
* Helper function to do most of the grunt work for individual driver
* ReportError
*/
void virReportErrorHelper(int domcode,
int errorcode,
const char *filename,
const char *funcname,
size_t linenr,
const char *fmt, ...)
{
int save_errno = errno;
va_list args;
char errorMessage[VIR_ERROR_MAX_LENGTH];
const char *virerr;
if (fmt) {
va_start(args, fmt);
vsnprintf(errorMessage, sizeof(errorMessage)-1, fmt, args);
va_end(args);
} else {
errorMessage[0] = '\0';
}
virerr = virErrorMsg(errorcode, (errorMessage[0] ? errorMessage : NULL));
virRaiseErrorFull(filename, funcname, linenr,
domcode, errorcode, VIR_ERR_ERROR,
virerr, errorMessage, NULL,
-1, -1, virerr, errorMessage);
errno = save_errno;
}
/**
* virStrerror:
* @theerrno: the errno value
* @errBuf: the buffer to save the error to
* @errBufLen: the buffer length
*
* Generate an error string for the given errno
*
* Returns a pointer to the error string, possibly indicating that the
* error is unknown
*/
const char *virStrerror(int theerrno, char *errBuf, size_t errBufLen)
{
int save_errno = errno;
const char *ret;
strerror_r(theerrno, errBuf, errBufLen);
ret = errBuf;
errno = save_errno;
return ret;
}
/**
* virReportSystemErrorFull:
* @domcode: the virErrorDomain indicating where it's coming from
* @theerrno: an errno number
* @filename: filename where error was raised
* @funcname: function name where error was raised
* @linenr: line number where error was raised
* @fmt: the message to display/transmit
* @...: extra parameters for the message display
*
* Convenience internal routine called when a system error is detected.
*/
void virReportSystemErrorFull(int domcode,
int theerrno,
const char *filename,
const char *funcname,
size_t linenr,
const char *fmt, ...)
{
int save_errno = errno;
char strerror_buf[VIR_ERROR_MAX_LENGTH];
char msgDetailBuf[VIR_ERROR_MAX_LENGTH];
const char *errnoDetail = virStrerror(theerrno, strerror_buf,
sizeof(strerror_buf));
const char *msg = virErrorMsg(VIR_ERR_SYSTEM_ERROR, fmt);
const char *msgDetail = NULL;
if (fmt) {
va_list args;
int n;
va_start(args, fmt);
n = vsnprintf(msgDetailBuf, sizeof(msgDetailBuf), fmt, args);
va_end(args);
size_t len = strlen(errnoDetail);
if (0 <= n && n + 2 + len < sizeof(msgDetailBuf)) {
char *p = msgDetailBuf + n;
stpcpy(stpcpy(p, ": "), errnoDetail);
msgDetail = msgDetailBuf;
}
}
if (!msgDetail)
msgDetail = errnoDetail;
virRaiseErrorFull(filename, funcname, linenr,
domcode, VIR_ERR_SYSTEM_ERROR, VIR_ERR_ERROR,
msg, msgDetail, NULL, theerrno, -1, msg, msgDetail);
errno = save_errno;
}
/**
* virReportOOMErrorFull:
* @domcode: the virErrorDomain indicating where it's coming from
* @filename: filename where error was raised
* @funcname: function name where error was raised
* @linenr: line number where error was raised
*
* Convenience internal routine called when an out of memory error is
* detected
*/
void virReportOOMErrorFull(int domcode,
const char *filename,
const char *funcname,
size_t linenr)
{
const char *virerr;
virerr = virErrorMsg(VIR_ERR_NO_MEMORY, NULL);
virRaiseErrorFull(filename, funcname, linenr,
domcode, VIR_ERR_NO_MEMORY, VIR_ERR_ERROR,
virerr, NULL, NULL, -1, -1, virerr, NULL);
}
/**
* virSetErrorLogPriorityFunc:
* @func: function to install
*
* Install a function used to filter error logging based on error priority.
*/
void virSetErrorLogPriorityFunc(virErrorLogPriorityFunc func)
{
virErrorLogPriorityFilter = func;
}
/**
* virErrorSetErrnoFromLastError:
*
* If the last error had a code of VIR_ERR_SYSTEM_ERROR
* then set errno to the value saved in the error object.
*
* If the last error had a code of VIR_ERR_NO_MEMORY
* then set errno to ENOMEM
*
* Otherwise set errno to EIO.
*/
void virErrorSetErrnoFromLastError(void)
{
virErrorPtr err = virGetLastError();
if (err && err->code == VIR_ERR_SYSTEM_ERROR) {
errno = err->int1;
} else if (err && err->code == VIR_ERR_NO_MEMORY) {
errno = ENOMEM;
} else {
errno = EIO;
}
}
/**
* virLastErrorIsSystemErrno:
* @errnum: the errno value
*
* Check if the last error reported is a system
* error with the specific errno value.
*
* If @errnum is zero, any system error will pass.
*
* Returns true if the last error was a system error with errno == @errnum
*/
bool virLastErrorIsSystemErrno(int errnum)
{
virErrorPtr err = virGetLastError();
if (!err)
return false;
if (err->code != VIR_ERR_SYSTEM_ERROR)
return false;
if (errnum != 0 && err->int1 != errnum)
return false;
return true;
}
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