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Message-Id: <20230811121755.24715-11-hare@suse.de>
Date: Fri, 11 Aug 2023 14:17:48 +0200
From: Hannes Reinecke <hare@...e.de>
To: Christoph Hellwig <hch@....de>
Cc: Sagi Grimberg <sagi@...mberg.me>,
Keith Busch <kbusch@...nel.org>,
linux-nvme@...ts.infradead.org,
Jakub Kicinski <kuba@...nel.org>,
Eric Dumazet <edumazet@...gle.com>,
Paolo Abeni <pabeni@...hat.com>,
netdev@...r.kernel.org,
Hannes Reinecke <hare@...e.de>
Subject: [PATCH 10/17] nvme-fabrics: parse options 'keyring' and 'tls_key'
Parse the fabrics options 'keyring' and 'tls_key' and store the
referenced keys in the options structure.
Signed-off-by: Hannes Reinecke <hare@...e.de>
---
drivers/nvme/host/fabrics.c | 49 ++++++++++++++++++++++++++++++++++++-
drivers/nvme/host/fabrics.h | 6 +++++
drivers/nvme/host/tcp.c | 11 ++++++---
3 files changed, 62 insertions(+), 4 deletions(-)
diff --git a/drivers/nvme/host/fabrics.c b/drivers/nvme/host/fabrics.c
index ddad482c3537..88246179e6b5 100644
--- a/drivers/nvme/host/fabrics.c
+++ b/drivers/nvme/host/fabrics.c
@@ -643,6 +643,10 @@ static const match_table_t opt_tokens = {
{ NVMF_OPT_NR_WRITE_QUEUES, "nr_write_queues=%d" },
{ NVMF_OPT_NR_POLL_QUEUES, "nr_poll_queues=%d" },
{ NVMF_OPT_TOS, "tos=%d" },
+#ifdef CONFIG_NVME_TCP_TLS
+ { NVMF_OPT_KEYRING, "keyring=%d" },
+ { NVMF_OPT_TLS_KEY, "tls_key=%d" },
+#endif
{ NVMF_OPT_FAIL_FAST_TMO, "fast_io_fail_tmo=%d" },
{ NVMF_OPT_DISCOVERY, "discovery" },
{ NVMF_OPT_DHCHAP_SECRET, "dhchap_secret=%s" },
@@ -660,9 +664,10 @@ static int nvmf_parse_options(struct nvmf_ctrl_options *opts,
char *options, *o, *p;
int token, ret = 0;
size_t nqnlen = 0;
- int ctrl_loss_tmo = NVMF_DEF_CTRL_LOSS_TMO;
+ int ctrl_loss_tmo = NVMF_DEF_CTRL_LOSS_TMO, key_id;
uuid_t hostid;
char hostnqn[NVMF_NQN_SIZE];
+ struct key *key;
/* Set defaults */
opts->queue_size = NVMF_DEF_QUEUE_SIZE;
@@ -928,6 +933,46 @@ static int nvmf_parse_options(struct nvmf_ctrl_options *opts,
}
opts->tos = token;
break;
+ case NVMF_OPT_KEYRING:
+ if (!IS_ENABLED(CONFIG_NVME_TCP_TLS)) {
+ pr_err("TLS is not supported\n");
+ ret = -EINVAL;
+ goto out;
+ }
+ if (match_int(args, &key_id) || key_id <= 0) {
+ ret = -EINVAL;
+ goto out;
+ }
+ key = key_lookup(key_id);
+ if (IS_ERR(key)) {
+ pr_err("Keyring %08x not found\n", key_id);
+ ret = PTR_ERR(key);
+ goto out;
+ }
+ pr_debug("Using keyring %08x\n", key_serial(key));
+ key_put(opts->keyring);
+ opts->keyring = key;
+ break;
+ case NVMF_OPT_TLS_KEY:
+ if (!IS_ENABLED(CONFIG_NVME_TCP_TLS)) {
+ pr_err("TLS is not supported\n");
+ ret = -EINVAL;
+ goto out;
+ }
+ if (match_int(args, &key_id) || key_id <= 0) {
+ ret = -EINVAL;
+ goto out;
+ }
+ key = key_lookup(key_id);
+ if (IS_ERR(key)) {
+ pr_err("Key %08x not found\n", key_id);
+ ret = PTR_ERR(key);
+ goto out;
+ }
+ pr_debug("Using key %08x\n", key_serial(key));
+ key_put(opts->tls_key);
+ opts->tls_key = key;
+ break;
case NVMF_OPT_DISCOVERY:
opts->discovery_nqn = true;
break;
@@ -1168,6 +1213,8 @@ static int nvmf_check_allowed_opts(struct nvmf_ctrl_options *opts,
void nvmf_free_options(struct nvmf_ctrl_options *opts)
{
nvmf_host_put(opts->host);
+ key_put(opts->keyring);
+ key_put(opts->tls_key);
kfree(opts->transport);
kfree(opts->traddr);
kfree(opts->trsvcid);
diff --git a/drivers/nvme/host/fabrics.h b/drivers/nvme/host/fabrics.h
index dac17c3fee26..fbaee5a7be19 100644
--- a/drivers/nvme/host/fabrics.h
+++ b/drivers/nvme/host/fabrics.h
@@ -71,6 +71,8 @@ enum {
NVMF_OPT_DHCHAP_SECRET = 1 << 23,
NVMF_OPT_DHCHAP_CTRL_SECRET = 1 << 24,
NVMF_OPT_TLS = 1 << 25,
+ NVMF_OPT_KEYRING = 1 << 26,
+ NVMF_OPT_TLS_KEY = 1 << 27,
};
/**
@@ -103,6 +105,8 @@ enum {
* @dhchap_secret: DH-HMAC-CHAP secret
* @dhchap_ctrl_secret: DH-HMAC-CHAP controller secret for bi-directional
* authentication
+ * @keyring: Keyring to use for key lookups
+ * @tls_key: TLS key for encrypted connections (TCP)
* @tls: Start TLS encrypted connections (TCP)
* @disable_sqflow: disable controller sq flow control
* @hdr_digest: generate/verify header digest (TCP)
@@ -130,6 +134,8 @@ struct nvmf_ctrl_options {
struct nvmf_host *host;
char *dhchap_secret;
char *dhchap_ctrl_secret;
+ struct key *keyring;
+ struct key *tls_key;
bool tls;
bool disable_sqflow;
bool hdr_digest;
diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c
index 34b6637a141d..1ce02a721c05 100644
--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c
@@ -1583,6 +1583,8 @@ static int nvme_tcp_start_tls(struct nvme_ctrl *nctrl,
dev_dbg(nctrl->device, "queue %d: start TLS with key %x\n",
qid, pskid);
+ if (nctrl->opts->keyring)
+ keyring = key_serial(nctrl->opts->keyring);
memset(&args, 0, sizeof(args));
args.ta_sock = queue->sock;
args.ta_done = nvme_tcp_tls_done;
@@ -1907,9 +1909,12 @@ static int nvme_tcp_alloc_admin_queue(struct nvme_ctrl *ctrl)
key_serial_t pskid = 0;
if (ctrl->opts->tls) {
- pskid = nvme_tls_psk_default(NULL,
- ctrl->opts->host->nqn,
- ctrl->opts->subsysnqn);
+ if (ctrl->opts->tls_key)
+ pskid = key_serial(ctrl->opts->tls_key);
+ else
+ pskid = nvme_tls_psk_default(ctrl->opts->keyring,
+ ctrl->opts->host->nqn,
+ ctrl->opts->subsysnqn);
if (!pskid) {
dev_err(ctrl->device, "no valid PSK found\n");
ret = -ENOKEY;
--
2.35.3
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