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libvirt/src/virterror.c
Daniel Veillard 635ae38979 * include/libvirt/libvirt.h[.in] include/libvirt/virterror.h 
proxy/libvirt_proxy.c qemud/Makefile.am qemud/conf.c qemud/conf.h
  qemud/dispatch.c qemud/internal.h qemud/protocol.h
  src/driver.h src/internal.h src/libvirt.c src/libvirt_sym.version
  src/proxy_internal.c src/proxy_internal.h src/qemu_internal.c
  src/test.c src/virsh.c src/virterror.c src/xen_internal.c
  src/xen_internal.h src/xend_internal.c src/xm_internal.c
  src/xml.h src/xs_internal.c: applied patch from Richard Jones
  adding virConnectGetCapabilities(), plus various small little
  fixes
* docs/*: fixed the api extractor script and regenerated
Daniel
2007-03-15 17:24:56 +00:00

630 lines
17 KiB
C
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/*
* virterror.c: implements error handling and reporting code for libvirt
*
* Copy: Copyright (C) 2006 Red Hat, Inc.
*
* See COPYING.LIB for the License of this software
*
* Author: Daniel Veillard <veillard@redhat.com>
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include "libvirt/libvirt.h"
#include "libvirt/virterror.h"
#include "internal.h"
static virError lastErr = /* the last error */
{ 0, 0, NULL, VIR_ERR_NONE, NULL, NULL, NULL, NULL, NULL, 0, 0, NULL };
static virErrorFunc virErrorHandler = NULL; /* global error handlet */
static void *virUserData = NULL; /* associated data */
/*
* Macro used to format the message as a string in __virRaiseError
* and borrowed from libxml2.
*/
#define VIR_GET_VAR_STR(msg, str) { \
int size, prev_size = -1; \
int chars; \
char *larger; \
va_list ap; \
\
str = (char *) malloc(150); \
if (str != NULL) { \
\
size = 150; \
\
while (1) { \
va_start(ap, msg); \
chars = vsnprintf(str, size, msg, ap); \
va_end(ap); \
if ((chars > -1) && (chars < size)) { \
if (prev_size == chars) { \
break; \
} else { \
prev_size = chars; \
} \
} \
if (chars > -1) \
size += chars + 1; \
else \
size += 100; \
if ((larger = (char *) realloc(str, size)) == NULL) { \
break; \
} \
str = larger; \
}} \
}
/*
* virGetLastError:
*
* Provide a pointer to the last error caught at the library level
* Simpler but may not be suitable for multithreaded accesses, in which
* case use virCopyLastError()
*
* Returns a pointer to the last error or NULL if none occured.
*/
virErrorPtr
virGetLastError(void)
{
if (lastErr.code == VIR_ERR_OK)
return (NULL);
return (&lastErr);
}
/*
* virCopyLastError:
* @to: target to receive the copy
*
* Copy the content of the last error caught at the library level
* 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)
{
if (to == NULL)
return (-1);
if (lastErr.code == VIR_ERR_OK)
return (0);
memcpy(to, &lastErr, sizeof(virError));
return (lastErr.code);
}
/**
* virResetError:
* @err: pointer to the virError to clean up
*
* Reset the error being pointed to
*/
void
virResetError(virErrorPtr err)
{
if (err == NULL)
return;
if (err->message != NULL)
free(err->message);
if (err->str1 != NULL)
free(err->str1);
if (err->str2 != NULL)
free(err->str2);
if (err->str3 != NULL)
free(err->str3);
memset(err, 0, sizeof(virError));
}
/**
* virResetLastError:
*
* Reset the last error caught at the library level.
*/
void
virResetLastError(void)
{
virResetError(&lastErr);
}
/**
* virConnGetLastError:
* @conn: pointer to the hypervisor connection
*
* Provide a pointer to the last error caught on that connection
* Simpler but may not be suitable for multithreaded accesses, in which
* case use virConnCopyLastError()
*
* Returns a pointer to the last error or NULL if none occured.
*/
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
* 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)
{
if (conn == NULL)
return (-1);
if (to == NULL)
return (-1);
if (conn->err.code == VIR_ERR_OK)
return (0);
memcpy(to, &conn->err, sizeof(virError));
return (conn->err.code);
}
/**
* virConnResetLastError:
* @conn: pointer to the hypervisor connection
*
* Reset the last error caught on that connection
*/
void
virConnResetLastError(virConnectPtr conn)
{
if (conn == NULL)
return;
virResetError(&conn->err);
}
/**
* 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;
conn->handler = handler;
conn->userData = userData;
}
/**
* 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;
}
switch (err->domain) {
case VIR_FROM_NONE:
dom = "";
break;
case VIR_FROM_XEN:
dom = "Xen ";
break;
case VIR_FROM_XML:
dom = "XML ";
break;
case VIR_FROM_XEND:
dom = "Xen Daemon ";
break;
case VIR_FROM_XENSTORE:
dom = "Xen Store ";
break;
case VIR_FROM_DOM:
dom = "Domain ";
break;
case VIR_FROM_RPC:
dom = "XML-RPC ";
break;
case VIR_FROM_QEMU:
dom = "QEMU ";
break;
case VIR_FROM_NET:
dom = "Network ";
break;
}
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, "libvir: %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, "libvir: %s%s %s%s: %s\n",
dom, lvl, domain, network, err->message);
else
fprintf(stderr, "libvir: %s%s %s%s: %s",
dom, lvl, domain, network, err->message);
}
/**
* __virRaiseError:
* @conn: the connection to the hypervisor if available
* @dom: the domain if available
* @net: the network if available
* @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
* @msg: 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
__virRaiseError(virConnectPtr conn, virDomainPtr dom, virNetworkPtr net,
int domain, int code, virErrorLevel level,
const char *str1, const char *str2, const char *str3,
int int1, int int2, const char *msg, ...)
{
virErrorPtr to = &lastErr;
void *userData = virUserData;
virErrorFunc handler = virErrorHandler;
char *str;
if (code == VIR_ERR_OK)
return;
/*
* try to find the best place to save and report the error
*/
if (conn != NULL) {
to = &conn->err;
if (conn->handler != NULL) {
handler = conn->handler;
userData = conn->userData;
}
}
/*
* formats the message
*/
if (msg == NULL) {
str = strdup(_("No error message provided"));
} else {
VIR_GET_VAR_STR(msg, str);
}
/*
* Save the information about the error
*/
virResetError(to);
to->conn = conn;
to->dom = dom;
to->net = net;
to->domain = domain;
to->code = code;
to->message = str;
to->level = level;
if (str1 != NULL)
to->str1 = strdup(str1);
if (str2 != NULL)
to->str2 = strdup(str2);
if (str3 != NULL)
to->str3 = strdup(str3);
to->int1 = int1;
to->int2 = int2;
/*
* now, report it
*/
if (handler != NULL) {
handler(userData, to);
} else {
virDefaultErrorFunc(to);
}
}
/**
* __virErrorMsg:
* @error: the virErrorNumber
* @info: usually the first paprameter string
*
* Internal routine to get the message associated to an error raised
* from the library
*
* Returns the constant string associated to @error
*/
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 = _("no support for hypervisor");
else
errmsg = _("no support for hypervisor %s");
break;
case VIR_ERR_NO_CONNECT:
if (info == NULL)
errmsg = _("could not connect to hypervisor");
else
errmsg = _("could not connect to %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 in");
else
errmsg = _("invalid argument in %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 %d");
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 domain name information");
else
errmsg = _("missing domain 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:
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 not well formed or invalid");
else
errmsg = _("XML description for %s is not well formed or invalid");
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 %s forbidden for read only access");
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;
}
return (errmsg);
}
/*
* vim: set tabstop=4:
* vim: set shiftwidth=4:
* vim: set expandtab:
*/
/*
* Local variables:
* indent-tabs-mode: nil
* c-indent-level: 4
* c-basic-offset: 4
* tab-width: 4
* End:
*/
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