diff options
Diffstat (limited to 'net/tls')
| -rw-r--r-- | net/tls/tls_main.c | 114 |
1 files changed, 111 insertions, 3 deletions
diff --git a/net/tls/tls_main.c b/net/tls/tls_main.c index 6f5c1146da4a..0d379970960e 100644 --- a/net/tls/tls_main.c +++ b/net/tls/tls_main.c @@ -38,6 +38,7 @@ #include <linux/highmem.h> #include <linux/netdevice.h> #include <linux/sched/signal.h> +#include <linux/inetdevice.h> #include <net/tls.h> @@ -56,11 +57,14 @@ enum { TLS_SW_TX, TLS_SW_RX, TLS_SW_RXTX, + TLS_HW_RECORD, TLS_NUM_CONFIG, }; static struct proto *saved_tcpv6_prot; static DEFINE_MUTEX(tcpv6_prot_mutex); +static LIST_HEAD(device_list); +static DEFINE_MUTEX(device_mutex); static struct proto tls_prots[TLS_NUM_PROTS][TLS_NUM_CONFIG]; static struct proto_ops tls_sw_proto_ops; @@ -241,8 +245,12 @@ static void tls_sk_proto_close(struct sock *sk, long timeout) lock_sock(sk); sk_proto_close = ctx->sk_proto_close; + if (ctx->conf == TLS_HW_RECORD) + goto skip_tx_cleanup; + if (ctx->conf == TLS_BASE) { kfree(ctx); + ctx = NULL; goto skip_tx_cleanup; } @@ -276,6 +284,11 @@ static void tls_sk_proto_close(struct sock *sk, long timeout) skip_tx_cleanup: release_sock(sk); sk_proto_close(sk, timeout); + /* free ctx for TLS_HW_RECORD, used by tcp_set_state + * for sk->sk_prot->unhash [tls_hw_unhash] + */ + if (ctx && ctx->conf == TLS_HW_RECORD) + kfree(ctx); } static int do_tls_getsockopt_tx(struct sock *sk, char __user *optval, @@ -493,6 +506,79 @@ static int tls_setsockopt(struct sock *sk, int level, int optname, return do_tls_setsockopt(sk, optname, optval, optlen); } +static struct tls_context *create_ctx(struct sock *sk) +{ + struct inet_connection_sock *icsk = inet_csk(sk); + struct tls_context *ctx; + + ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return NULL; + + icsk->icsk_ulp_data = ctx; + return ctx; +} + +static int tls_hw_prot(struct sock *sk) +{ + struct tls_context *ctx; + struct tls_device *dev; + int rc = 0; + + mutex_lock(&device_mutex); + list_for_each_entry(dev, &device_list, dev_list) { + if (dev->feature && dev->feature(dev)) { + ctx = create_ctx(sk); + if (!ctx) + goto out; + + ctx->hash = sk->sk_prot->hash; + ctx->unhash = sk->sk_prot->unhash; + ctx->sk_proto_close = sk->sk_prot->close; + ctx->conf = TLS_HW_RECORD; + update_sk_prot(sk, ctx); + rc = 1; + break; + } + } +out: + mutex_unlock(&device_mutex); + return rc; +} + +static void tls_hw_unhash(struct sock *sk) +{ + struct tls_context *ctx = tls_get_ctx(sk); + struct tls_device *dev; + + mutex_lock(&device_mutex); + list_for_each_entry(dev, &device_list, dev_list) { + if (dev->unhash) + dev->unhash(dev, sk); + } + mutex_unlock(&device_mutex); + ctx->unhash(sk); +} + +static int tls_hw_hash(struct sock *sk) +{ + struct tls_context *ctx = tls_get_ctx(sk); + struct tls_device *dev; + int err; + + err = ctx->hash(sk); + mutex_lock(&device_mutex); + list_for_each_entry(dev, &device_list, dev_list) { + if (dev->hash) + err |= dev->hash(dev, sk); + } + mutex_unlock(&device_mutex); + + if (err) + tls_hw_unhash(sk); + return err; +} + static void build_protos(struct proto *prot, struct proto *base) { prot[TLS_BASE] = *base; @@ -511,15 +597,22 @@ static void build_protos(struct proto *prot, struct proto *base) prot[TLS_SW_RXTX] = prot[TLS_SW_TX]; prot[TLS_SW_RXTX].recvmsg = tls_sw_recvmsg; prot[TLS_SW_RXTX].close = tls_sk_proto_close; + + prot[TLS_HW_RECORD] = *base; + prot[TLS_HW_RECORD].hash = tls_hw_hash; + prot[TLS_HW_RECORD].unhash = tls_hw_unhash; + prot[TLS_HW_RECORD].close = tls_sk_proto_close; } static int tls_init(struct sock *sk) { int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4; - struct inet_connection_sock *icsk = inet_csk(sk); struct tls_context *ctx; int rc = 0; + if (tls_hw_prot(sk)) + goto out; + /* The TLS ulp is currently supported only for TCP sockets * in ESTABLISHED state. * Supporting sockets in LISTEN state will require us @@ -530,12 +623,11 @@ static int tls_init(struct sock *sk) return -ENOTSUPP; /* allocate tls context */ - ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); + ctx = create_ctx(sk); if (!ctx) { rc = -ENOMEM; goto out; } - icsk->icsk_ulp_data = ctx; ctx->setsockopt = sk->sk_prot->setsockopt; ctx->getsockopt = sk->sk_prot->getsockopt; ctx->sk_proto_close = sk->sk_prot->close; @@ -557,6 +649,22 @@ out: return rc; } +void tls_register_device(struct tls_device *device) +{ + mutex_lock(&device_mutex); + list_add_tail(&device->dev_list, &device_list); + mutex_unlock(&device_mutex); +} +EXPORT_SYMBOL(tls_register_device); + +void tls_unregister_device(struct tls_device *device) +{ + mutex_lock(&device_mutex); + list_del(&device->dev_list); + mutex_unlock(&device_mutex); +} +EXPORT_SYMBOL(tls_unregister_device); + static struct tcp_ulp_ops tcp_tls_ulp_ops __read_mostly = { .name = "tls", .uid = TCP_ULP_TLS, |