* [PATCH libnvme] fabrics: restore hostname traddr support
@ 2021-09-26 18:29 Sagi Grimberg
2021-09-27 19:39 ` Chaitanya Kulkarni
0 siblings, 1 reply; 3+ messages in thread
From: Sagi Grimberg @ 2021-09-26 18:29 UTC (permalink / raw)
To: linux-nvme, Keith Busch; +Cc: Hannes Reinecke
We used to support hostname passed in traddr, with the move of nvme-cli
to use libnvme we lost this capability, now lets restore it.
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
---
src/nvme/fabrics.c | 69 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 69 insertions(+)
diff --git a/src/nvme/fabrics.c b/src/nvme/fabrics.c
index 4b0ba16e66a8..ebfc6356844d 100644
--- a/src/nvme/fabrics.c
+++ b/src/nvme/fabrics.c
@@ -21,6 +21,8 @@
#include <sys/stat.h>
#include <sys/types.h>
+#include <arpa/inet.h>
+#include <netdb.h>
#ifdef CONFIG_SYSTEMD
#include <systemd/sd-id128.h>
@@ -213,6 +215,63 @@ static int add_argument(char **argstr, const char *tok, const char *arg)
return 0;
}
+static bool traddr_is_hostname(nvme_ctrl_t c)
+{
+ char addrstr[NVMF_TRADDR_SIZE];
+
+ if (!c->traddr)
+ return false;
+ if (strcmp(c->transport, "tcp") && strcmp(c->transport, "rdma"))
+ return false;
+ if (inet_pton(AF_INET, c->traddr, addrstr) > 0 ||
+ inet_pton(AF_INET6, c->traddr, addrstr) > 0)
+ return false;
+ return true;
+}
+
+static int hostname2traddr(nvme_ctrl_t c)
+{
+ struct addrinfo *host_info, hints = {.ai_family = AF_UNSPEC};
+ char addrstr[NVMF_TRADDR_SIZE];
+ const char *p;
+ int ret;
+
+ ret = getaddrinfo(c->traddr, NULL, &hints, &host_info);
+ if (ret) {
+ fprintf(stderr, "failed to resolve host %s info\n", c->traddr);
+ return ret;
+ }
+
+ switch (host_info->ai_family) {
+ case AF_INET:
+ p = inet_ntop(host_info->ai_family,
+ &(((struct sockaddr_in *)host_info->ai_addr)->sin_addr),
+ addrstr, NVMF_TRADDR_SIZE);
+ break;
+ case AF_INET6:
+ p = inet_ntop(host_info->ai_family,
+ &(((struct sockaddr_in6 *)host_info->ai_addr)->sin6_addr),
+ addrstr, NVMF_TRADDR_SIZE);
+ break;
+ default:
+ fprintf(stderr, "unrecognized address family (%d) %s\n",
+ host_info->ai_family, c->traddr);
+ ret = -EINVAL;
+ goto free_addrinfo;
+ }
+
+ if (!p) {
+ fprintf(stderr, "failed to get traddr for %s\n", c->traddr);
+ ret = -errno;
+ goto free_addrinfo;
+ }
+ c->traddr = strdup(addrstr);
+
+free_addrinfo:
+ freeaddrinfo(host_info);
+ return ret;
+}
+
static int build_options(nvme_host_t h, nvme_ctrl_t c, char **argstr)
{
struct nvme_fabrics_config *cfg = nvme_ctrl_get_config(c);
@@ -353,6 +412,11 @@ int nvmf_add_ctrl_opts(nvme_ctrl_t c, struct nvme_fabrics_config *cfg)
int ret;
cfg = merge_config(c, cfg);
+ if (traddr_is_hostname(c)) {
+ ret = hostname2traddr(c);
+ if (ret)
+ return ret;
+ }
ret = build_options(h, c, &argstr);
if (ret)
@@ -375,6 +439,11 @@ int nvmf_add_ctrl(nvme_host_t h, nvme_ctrl_t c,
cfg = merge_config(c, cfg);
nvme_ctrl_disable_sqflow(c, disable_sqflow);
nvme_ctrl_set_discovered(c, true);
+ if (traddr_is_hostname(c)) {
+ ret = hostname2traddr(c);
+ if (ret)
+ return ret;
+ }
ret = build_options(h, c, &argstr);
if (ret)
--
2.30.2
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Linux-nvme@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-nvme
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH libnvme] fabrics: restore hostname traddr support
2021-09-26 18:29 [PATCH libnvme] fabrics: restore hostname traddr support Sagi Grimberg
@ 2021-09-27 19:39 ` Chaitanya Kulkarni
2021-09-27 20:22 ` Keith Busch
0 siblings, 1 reply; 3+ messages in thread
From: Chaitanya Kulkarni @ 2021-09-27 19:39 UTC (permalink / raw)
To: linux-nvme
> +static int hostname2traddr(nvme_ctrl_t c)
> +{
> + struct addrinfo *host_info, hints = {.ai_family = AF_UNSPEC};
> + char addrstr[NVMF_TRADDR_SIZE];
do we need to setup the addrstr to 0 with = { 0 }; ?
> + const char *p;
> + int ret;
With that comment looks good to me.
Looks good.
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
_______________________________________________
Linux-nvme mailing list
Linux-nvme@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-nvme
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH libnvme] fabrics: restore hostname traddr support
2021-09-27 19:39 ` Chaitanya Kulkarni
@ 2021-09-27 20:22 ` Keith Busch
0 siblings, 0 replies; 3+ messages in thread
From: Keith Busch @ 2021-09-27 20:22 UTC (permalink / raw)
To: Chaitanya Kulkarni; +Cc: linux-nvme
On Mon, Sep 27, 2021 at 07:39:53PM +0000, Chaitanya Kulkarni wrote:
>
> > +static int hostname2traddr(nvme_ctrl_t c)
> > +{
> > + struct addrinfo *host_info, hints = {.ai_family = AF_UNSPEC};
> > + char addrstr[NVMF_TRADDR_SIZE];
>
> do we need to setup the addrstr to 0 with = { 0 }; ?
Looks like it's unconditionally set if it is actually used, so should be
fine as-is.
Patch applied.
_______________________________________________
Linux-nvme mailing list
Linux-nvme@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-nvme
^ permalink raw reply [flat|nested] 3+ messages in thread
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2021-09-26 18:29 [PATCH libnvme] fabrics: restore hostname traddr support Sagi Grimberg
2021-09-27 19:39 ` Chaitanya Kulkarni
2021-09-27 20:22 ` Keith Busch
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