tls: support for Inline tls record
Facility to register Inline TLS drivers to net/tls. Setup TLS_HW_RECORD prot to listen on offload device. Cases handled - Inline TLS device exists, setup prot for TLS_HW_RECORD - Atleast one Inline TLS exists, sets TLS_HW_RECORD. - If non-inline device establish connection, move to TLS_SW_TX Signed-off-by: Atul Gupta <atul.gupta@chelsio.com> Reviewed-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Atul Gupta
David S. Miller
parent
d4069fe6fc
commit
dd0bed1665
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@ -56,6 +56,32 @@
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#define TLS_RECORD_TYPE_DATA 0x17
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#define TLS_AAD_SPACE_SIZE 13
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#define TLS_DEVICE_NAME_MAX 32
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/*
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* This structure defines the routines for Inline TLS driver.
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* The following routines are optional and filled with a
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* null pointer if not defined.
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*
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* @name: Its the name of registered Inline tls device
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* @dev_list: Inline tls device list
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* int (*feature)(struct tls_device *device);
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* Called to return Inline TLS driver capability
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*
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* int (*hash)(struct tls_device *device, struct sock *sk);
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* This function sets Inline driver for listen and program
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* device specific functioanlity as required
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*
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* void (*unhash)(struct tls_device *device, struct sock *sk);
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* This function cleans listen state set by Inline TLS driver
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*/
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struct tls_device {
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char name[TLS_DEVICE_NAME_MAX];
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struct list_head dev_list;
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int (*feature)(struct tls_device *device);
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int (*hash)(struct tls_device *device, struct sock *sk);
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void (*unhash)(struct tls_device *device, struct sock *sk);
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};
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struct tls_sw_context {
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struct crypto_aead *aead_send;
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@ -114,7 +140,7 @@ struct tls_context {
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void *priv_ctx;
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u8 conf:2;
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u8 conf:3;
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struct cipher_context tx;
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struct cipher_context rx;
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@ -135,6 +161,8 @@ struct tls_context {
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int (*getsockopt)(struct sock *sk, int level,
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int optname, char __user *optval,
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int __user *optlen);
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int (*hash)(struct sock *sk);
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void (*unhash)(struct sock *sk);
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};
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int wait_on_pending_writer(struct sock *sk, long *timeo);
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@ -283,5 +311,7 @@ static inline struct tls_offload_context *tls_offload_ctx(
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int tls_proccess_cmsg(struct sock *sk, struct msghdr *msg,
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unsigned char *record_type);
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void tls_register_device(struct tls_device *device);
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void tls_unregister_device(struct tls_device *device);
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#endif /* _TLS_OFFLOAD_H */
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@ -38,6 +38,7 @@
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#include <linux/highmem.h>
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#include <linux/netdevice.h>
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#include <linux/sched/signal.h>
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#include <linux/inetdevice.h>
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#include <net/tls.h>
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@ -56,11 +57,14 @@ enum {
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TLS_SW_TX,
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TLS_SW_RX,
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TLS_SW_RXTX,
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TLS_HW_RECORD,
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TLS_NUM_CONFIG,
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};
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static struct proto *saved_tcpv6_prot;
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static DEFINE_MUTEX(tcpv6_prot_mutex);
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static LIST_HEAD(device_list);
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static DEFINE_MUTEX(device_mutex);
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static struct proto tls_prots[TLS_NUM_PROTS][TLS_NUM_CONFIG];
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static struct proto_ops tls_sw_proto_ops;
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@ -241,8 +245,12 @@ static void tls_sk_proto_close(struct sock *sk, long timeout)
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lock_sock(sk);
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sk_proto_close = ctx->sk_proto_close;
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if (ctx->conf == TLS_HW_RECORD)
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goto skip_tx_cleanup;
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if (ctx->conf == TLS_BASE) {
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kfree(ctx);
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ctx = NULL;
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goto skip_tx_cleanup;
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}
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@ -276,6 +284,11 @@ static void tls_sk_proto_close(struct sock *sk, long timeout)
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skip_tx_cleanup:
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release_sock(sk);
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sk_proto_close(sk, timeout);
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/* free ctx for TLS_HW_RECORD, used by tcp_set_state
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* for sk->sk_prot->unhash [tls_hw_unhash]
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*/
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if (ctx && ctx->conf == TLS_HW_RECORD)
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kfree(ctx);
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}
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static int do_tls_getsockopt_tx(struct sock *sk, char __user *optval,
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@ -493,6 +506,79 @@ static int tls_setsockopt(struct sock *sk, int level, int optname,
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return do_tls_setsockopt(sk, optname, optval, optlen);
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}
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static struct tls_context *create_ctx(struct sock *sk)
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{
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struct inet_connection_sock *icsk = inet_csk(sk);
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struct tls_context *ctx;
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ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
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if (!ctx)
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return NULL;
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icsk->icsk_ulp_data = ctx;
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return ctx;
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}
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static int tls_hw_prot(struct sock *sk)
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{
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struct tls_context *ctx;
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struct tls_device *dev;
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int rc = 0;
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mutex_lock(&device_mutex);
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list_for_each_entry(dev, &device_list, dev_list) {
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if (dev->feature && dev->feature(dev)) {
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ctx = create_ctx(sk);
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if (!ctx)
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goto out;
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ctx->hash = sk->sk_prot->hash;
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ctx->unhash = sk->sk_prot->unhash;
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ctx->sk_proto_close = sk->sk_prot->close;
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ctx->conf = TLS_HW_RECORD;
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update_sk_prot(sk, ctx);
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rc = 1;
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break;
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}
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}
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out:
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mutex_unlock(&device_mutex);
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return rc;
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}
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static void tls_hw_unhash(struct sock *sk)
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{
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struct tls_context *ctx = tls_get_ctx(sk);
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struct tls_device *dev;
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mutex_lock(&device_mutex);
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list_for_each_entry(dev, &device_list, dev_list) {
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if (dev->unhash)
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dev->unhash(dev, sk);
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}
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mutex_unlock(&device_mutex);
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ctx->unhash(sk);
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}
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static int tls_hw_hash(struct sock *sk)
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{
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struct tls_context *ctx = tls_get_ctx(sk);
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struct tls_device *dev;
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int err;
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err = ctx->hash(sk);
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mutex_lock(&device_mutex);
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list_for_each_entry(dev, &device_list, dev_list) {
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if (dev->hash)
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err |= dev->hash(dev, sk);
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}
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mutex_unlock(&device_mutex);
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if (err)
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tls_hw_unhash(sk);
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return err;
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}
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static void build_protos(struct proto *prot, struct proto *base)
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{
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prot[TLS_BASE] = *base;
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@ -511,15 +597,22 @@ static void build_protos(struct proto *prot, struct proto *base)
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prot[TLS_SW_RXTX] = prot[TLS_SW_TX];
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prot[TLS_SW_RXTX].recvmsg = tls_sw_recvmsg;
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prot[TLS_SW_RXTX].close = tls_sk_proto_close;
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prot[TLS_HW_RECORD] = *base;
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prot[TLS_HW_RECORD].hash = tls_hw_hash;
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prot[TLS_HW_RECORD].unhash = tls_hw_unhash;
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prot[TLS_HW_RECORD].close = tls_sk_proto_close;
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}
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static int tls_init(struct sock *sk)
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{
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int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4;
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struct inet_connection_sock *icsk = inet_csk(sk);
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struct tls_context *ctx;
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int rc = 0;
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if (tls_hw_prot(sk))
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goto out;
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/* The TLS ulp is currently supported only for TCP sockets
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* in ESTABLISHED state.
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* Supporting sockets in LISTEN state will require us
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@ -530,12 +623,11 @@ static int tls_init(struct sock *sk)
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return -ENOTSUPP;
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/* allocate tls context */
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ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
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ctx = create_ctx(sk);
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if (!ctx) {
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rc = -ENOMEM;
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goto out;
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}
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icsk->icsk_ulp_data = ctx;
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ctx->setsockopt = sk->sk_prot->setsockopt;
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ctx->getsockopt = sk->sk_prot->getsockopt;
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ctx->sk_proto_close = sk->sk_prot->close;
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@ -557,6 +649,22 @@ out:
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return rc;
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}
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void tls_register_device(struct tls_device *device)
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{
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mutex_lock(&device_mutex);
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list_add_tail(&device->dev_list, &device_list);
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mutex_unlock(&device_mutex);
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}
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EXPORT_SYMBOL(tls_register_device);
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void tls_unregister_device(struct tls_device *device)
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{
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mutex_lock(&device_mutex);
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list_del(&device->dev_list);
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mutex_unlock(&device_mutex);
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}
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EXPORT_SYMBOL(tls_unregister_device);
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static struct tcp_ulp_ops tcp_tls_ulp_ops __read_mostly = {
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.name = "tls",
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.uid = TCP_ULP_TLS,
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