[libvirt] [PATCH] Improve error reporting for virConnectGetHostname calls
Cole Robinson
crobinso at redhat.com
Tue Oct 27 15:37:22 UTC 2009
All drivers have copy + pasted inadequate error reporting which wraps
util.c:virGetHostname. Move all error reporting to this function, and improve
what we report.
Signed-off-by: Cole Robinson <crobinso at redhat.com>
---
daemon/libvirtd.c | 3 +--
src/lxc/lxc_driver.c | 10 +---------
src/qemu/qemu_driver.c | 14 ++------------
src/test/test_driver.c | 10 +---------
src/uml/uml_driver.c | 10 +---------
src/util/util.c | 18 +++++++++++++++---
src/util/util.h | 2 +-
src/vbox/vbox_tmpl.c | 11 +----------
src/xen/xen_driver.c | 10 +---------
src/xen/xend_internal.c | 3 +--
tools/virsh.c | 2 +-
11 files changed, 26 insertions(+), 67 deletions(-)
diff --git a/daemon/libvirtd.c b/daemon/libvirtd.c
index 03d091a..058e684 100644
--- a/daemon/libvirtd.c
+++ b/daemon/libvirtd.c
@@ -939,9 +939,8 @@ static struct qemud_server *qemudNetworkInit(struct qemud_server *server) {
if (!mdns_name) {
char groupname[64], *localhost, *tmp;
/* Extract the host part of the potentially FQDN */
- localhost = virGetHostname();
+ localhost = virGetHostname(NULL);
if (localhost == NULL) {
- virReportOOMError(NULL);
goto cleanup;
}
if ((tmp = strchr(localhost, '.')))
diff --git a/src/lxc/lxc_driver.c b/src/lxc/lxc_driver.c
index ef97364..73f1c8e 100644
--- a/src/lxc/lxc_driver.c
+++ b/src/lxc/lxc_driver.c
@@ -2058,16 +2058,8 @@ cleanup:
static char *lxcGetHostname (virConnectPtr conn)
{
- char *result;
-
- result = virGetHostname();
- if (result == NULL) {
- virReportSystemError (conn, errno,
- "%s", _("failed to determine host name"));
- return NULL;
- }
/* Caller frees this string. */
- return result;
+ return virGetHostname(conn);
}
static int lxcFreezeContainer(lxc_driver_t *driver, virDomainObjPtr vm)
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index a3beedb..86546e5 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -2623,16 +2623,8 @@ cleanup:
static char *
qemudGetHostname (virConnectPtr conn)
{
- char *result;
-
- result = virGetHostname();
- if (result == NULL) {
- virReportSystemError (conn, errno,
- "%s", _("failed to determine host name"));
- return NULL;
- }
/* Caller frees this string. */
- return result;
+ return virGetHostname(conn);
}
static int qemudListDomains(virConnectPtr conn, int *ids, int nids) {
@@ -6283,9 +6275,7 @@ qemudDomainMigratePrepare2 (virConnectPtr dconn,
if (port == QEMUD_MIGRATION_NUM_PORTS) port = 0;
/* Get hostname */
- if ((hostname = virGetHostname()) == NULL) {
- virReportSystemError (dconn, errno,
- "%s", _("failed to determine host name"));
+ if ((hostname = virGetHostname(dconn)) == NULL) {
goto cleanup;
}
diff --git a/src/test/test_driver.c b/src/test/test_driver.c
index 36f8158..4a081be 100644
--- a/src/test/test_driver.c
+++ b/src/test/test_driver.c
@@ -994,16 +994,8 @@ static int testGetVersion(virConnectPtr conn ATTRIBUTE_UNUSED,
static char *testGetHostname (virConnectPtr conn)
{
- char *result;
-
- result = virGetHostname();
- if (result == NULL) {
- virReportSystemError(conn, errno,
- "%s", _("cannot lookup hostname"));
- return NULL;
- }
/* Caller frees this string. */
- return result;
+ return virGetHostname(conn);
}
static int testGetMaxVCPUs(virConnectPtr conn ATTRIBUTE_UNUSED,
diff --git a/src/uml/uml_driver.c b/src/uml/uml_driver.c
index 9a7fe42..cd92a6b 100644
--- a/src/uml/uml_driver.c
+++ b/src/uml/uml_driver.c
@@ -1131,16 +1131,8 @@ cleanup:
static char *
umlGetHostname (virConnectPtr conn)
{
- char *result;
-
- result = virGetHostname();
- if (result == NULL) {
- virReportSystemError(conn, errno,
- "%s", _("cannot lookup hostname"));
- return NULL;
- }
/* Caller frees this string. */
- return result;
+ return virGetHostname(conn);
}
static int umlListDomains(virConnectPtr conn, int *ids, int nids) {
diff --git a/src/util/util.c b/src/util/util.c
index 98f8a14..49eac6d 100644
--- a/src/util/util.c
+++ b/src/util/util.c
@@ -1804,30 +1804,42 @@ int virDiskNameToIndex(const char *name) {
#define AI_CANONIDN 0
#endif
-char *virGetHostname(void)
+char *virGetHostname(virConnectPtr conn)
{
int r;
char hostname[HOST_NAME_MAX+1], *result;
struct addrinfo hints, *info;
r = gethostname (hostname, sizeof(hostname));
- if (r == -1)
+ if (r == -1) {
+ virReportSystemError (conn, errno,
+ "%s", _("failed to determine host name"));
return NULL;
+ }
NUL_TERMINATE(hostname);
memset(&hints, 0, sizeof(hints));
hints.ai_flags = AI_CANONNAME|AI_CANONIDN;
hints.ai_family = AF_UNSPEC;
r = getaddrinfo(hostname, NULL, &hints, &info);
- if (r != 0)
+ if (r != 0) {
+ ReportError(conn, VIR_ERR_INTERNAL_ERROR,
+ _("getaddrinfo failed for '%s': %s"),
+ hostname, gai_strerror(r));
return NULL;
+ }
if (info->ai_canonname == NULL) {
+ ReportError(conn, VIR_ERR_INTERNAL_ERROR,
+ "%s", _("could not determine canonical host name"));
freeaddrinfo(info);
return NULL;
}
/* Caller frees this string. */
result = strdup (info->ai_canonname);
+ if (!result)
+ virReportOOMError(conn);
+
freeaddrinfo(info);
return result;
}
diff --git a/src/util/util.h b/src/util/util.h
index 8679636..85d5488 100644
--- a/src/util/util.h
+++ b/src/util/util.h
@@ -222,7 +222,7 @@ static inline int getuid (void) { return 0; }
static inline int getgid (void) { return 0; }
#endif
-char *virGetHostname(void);
+char *virGetHostname(virConnectPtr conn);
int virKillProcess(pid_t pid, int sig);
diff --git a/src/vbox/vbox_tmpl.c b/src/vbox/vbox_tmpl.c
index 4f43901..2a17946 100644
--- a/src/vbox/vbox_tmpl.c
+++ b/src/vbox/vbox_tmpl.c
@@ -594,17 +594,8 @@ static int vboxGetVersion(virConnectPtr conn, unsigned long *version) {
}
static char *vboxGetHostname(virConnectPtr conn) {
- char *hostname;
-
/* the return string should be freed by caller */
- hostname = virGetHostname();
- if (hostname == NULL) {
- vboxError(conn, VIR_ERR_INTERNAL_ERROR,"%s",
- "failed to determine host name");
- return NULL;
- }
-
- return hostname;
+ return virGetHostname(conn);
}
static int vboxGetMaxVcpus(virConnectPtr conn, const char *type ATTRIBUTE_UNUSED) {
diff --git a/src/xen/xen_driver.c b/src/xen/xen_driver.c
index f2744b0..0818cd3 100644
--- a/src/xen/xen_driver.c
+++ b/src/xen/xen_driver.c
@@ -484,16 +484,8 @@ xenUnifiedGetVersion (virConnectPtr conn, unsigned long *hvVer)
static char *
xenUnifiedGetHostname (virConnectPtr conn)
{
- char *result;
-
- result = virGetHostname();
- if (result == NULL) {
- virReportSystemError(conn, errno,
- "%s", _("cannot lookup hostname"));
- return NULL;
- }
/* Caller frees this string. */
- return result;
+ return virGetHostname(conn);
}
static int
diff --git a/src/xen/xend_internal.c b/src/xen/xend_internal.c
index d3ab019..6d1d851 100644
--- a/src/xen/xend_internal.c
+++ b/src/xen/xend_internal.c
@@ -4347,9 +4347,8 @@ xenDaemonDomainMigratePrepare (virConnectPtr dconn,
* deallocates this string.
*/
if (uri_in == NULL) {
- *uri_out = virGetHostname();
+ *uri_out = virGetHostname(dconn);
if (*uri_out == NULL) {
- virReportOOMError(dconn);
return -1;
}
}
diff --git a/tools/virsh.c b/tools/virsh.c
index 6b93405..3c668da 100644
--- a/tools/virsh.c
+++ b/tools/virsh.c
@@ -524,7 +524,7 @@ cmdRunConsole(vshControl *ctl, virDomainPtr dom)
char *thatHost = NULL;
char *thisHost = NULL;
- if (!(thisHost = virGetHostname())) {
+ if (!(thisHost = virGetHostname(ctl->conn))) {
vshError(ctl, "%s", _("Failed to get local hostname"));
goto cleanup;
}
--
1.6.5.rc2
More information about the libvir-list
mailing list