[libvirt] [PATCH v2] iscsi: pass hostnames to iscsiadm instead of resolving them
Daniel P. Berrange
berrange at redhat.com
Fri Jun 7 11:49:32 UTC 2013
On Thu, Jun 06, 2013 at 05:08:12PM +0200, Ján Tomko wrote:
> iscsiadm now supports specifying hostnames in the portal argument [1]
>
> Instead of resolving the hostname to a single IPv4 address, pass the
> hostname to isciadm, allowing IPv6 targets to work.
>
> Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=907171
>
> [1] https://bugzilla.redhat.com/show_bug.cgi?id=624437
> ---
> v1: https://www.redhat.com/archives/libvir-list/2013-May/msg01930.html
>
> src/storage/storage_backend_iscsi.c | 69 +++++++------------------------------
> 1 file changed, 12 insertions(+), 57 deletions(-)
>
> diff --git a/src/storage/storage_backend_iscsi.c b/src/storage/storage_backend_iscsi.c
> index ad38ab2..0a4cd22 100644
> --- a/src/storage/storage_backend_iscsi.c
> +++ b/src/storage/storage_backend_iscsi.c
> @@ -24,9 +24,6 @@
> #include <config.h>
>
> #include <dirent.h>
> -#include <sys/socket.h>
> -#include <netdb.h>
> -#include <sys/types.h>
> #include <sys/wait.h>
> #include <string.h>
> #include <stdio.h>
> @@ -47,55 +44,12 @@
>
> #define VIR_FROM_THIS VIR_FROM_STORAGE
>
> -static int
> -virStorageBackendISCSITargetIP(const char *hostname,
> - char *ipaddr,
> - size_t ipaddrlen)
> -{
> - struct addrinfo hints;
> - struct addrinfo *result = NULL;
> - int ret;
> -
> - memset(&hints, 0, sizeof(hints));
> - hints.ai_flags = AI_ADDRCONFIG;
> - hints.ai_family = AF_INET;
> - hints.ai_socktype = SOCK_STREAM;
> - hints.ai_protocol = 0;
> -
> - ret = getaddrinfo(hostname, NULL, &hints, &result);
> - if (ret != 0) {
> - virReportError(VIR_ERR_INTERNAL_ERROR,
> - _("host lookup failed %s"),
> - gai_strerror(ret));
> - return -1;
> - }
> -
> - if (result == NULL) {
> - virReportError(VIR_ERR_INTERNAL_ERROR,
> - _("no IP address for target %s"),
> - hostname);
> - return -1;
> - }
> -
> - if (getnameinfo(result->ai_addr, result->ai_addrlen,
> - ipaddr, ipaddrlen, NULL, 0,
> - NI_NUMERICHOST) < 0) {
> - virReportError(VIR_ERR_INTERNAL_ERROR,
> - _("cannot format ip addr for %s"),
> - hostname);
> - freeaddrinfo(result);
> - return -1;
> - }
> -
> - freeaddrinfo(result);
> - return 0;
> -}
> -
> static char *
> virStorageBackendISCSIPortal(virStoragePoolSourcePtr source)
> {
> - char ipaddr[NI_MAXHOST];
> - char *portal;
> + char *portal = NULL;
> + const char *host;
> + int port = 3260;
>
> if (source->nhost != 1) {
> virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
> @@ -103,15 +57,16 @@ virStorageBackendISCSIPortal(virStoragePoolSourcePtr source)
> return NULL;
> }
>
> - if (virStorageBackendISCSITargetIP(source->hosts[0].name,
> - ipaddr, sizeof(ipaddr)) < 0)
> - return NULL;
> + host = source->hosts[0].name;
> + if (source->hosts[0].port != 0)
> + port = source->hosts[0].port;
>
> - if (virAsprintf(&portal, "%s:%d,1", ipaddr,
> - source->hosts[0].port ?
> - source->hosts[0].port : 3260) < 0) {
> - virReportOOMError();
> - return NULL;
> + if (strchr(host, ':')) {
> + if (virAsprintf(&portal, "[%s]:%d,1", host, port) < 0)
> + virReportOOMError();
> + } else {
> + if (virAsprintf(&portal, "%s:%d,1", host, port) < 0)
> + virReportOOMError();
> }
ACK, nice to delete so much code.
Daniel
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