tls: Rename TLS_INFO_ZC_SENDFILE to TLS_INFO_ZC_TX

To embrace possible future optimizations of TLS, rename zerocopy
sendfile definitions to more generic ones:

* setsockopt: TLS_TX_ZEROCOPY_SENDFILE- > TLS_TX_ZEROCOPY_RO
* sock_diag: TLS_INFO_ZC_SENDFILE -> TLS_INFO_ZC_RO_TX

RO stands for readonly and emphasizes that the application shouldn't
modify the data being transmitted with zerocopy to avoid potential
disconnection.

Fixes: c1318b39c7d3 ("tls: Add opt-in zerocopy mode of sendfile()")
Signed-off-by: Maxim Mikityanskiy <maximmi@nvidia.com>
Link: https://lore.kernel.org/r/20220608153425.3151146-1-maximmi@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/include/uapi/linux/tls.h b/include/uapi/linux/tls.h
index ac39328..bb8f808 100644 (file)
--- a/include/uapi/linux/tls.h
+++ b/include/uapi/linux/tls.h
@@ -39,7 +39,7 @@
 /* TLS socket options */
 #define TLS_TX                 1       /* Set transmit parameters */
 #define TLS_RX                 2       /* Set receive parameters */
-#define TLS_TX_ZEROCOPY_SENDFILE       3       /* transmit zerocopy sendfile */
+#define TLS_TX_ZEROCOPY_RO     3       /* TX zerocopy (only sendfile now) */
 
 /* Supported versions */
 #define TLS_VERSION_MINOR(ver) ((ver) & 0xFF)
@@ -161,7 +161,7 @@ enum {
        TLS_INFO_CIPHER,
        TLS_INFO_TXCONF,
        TLS_INFO_RXCONF,
-       TLS_INFO_ZC_SENDFILE,
+       TLS_INFO_ZC_RO_TX,
        __TLS_INFO_MAX,
 };
 #define TLS_INFO_MAX (__TLS_INFO_MAX - 1)

diff --git a/net/tls/tls_main.c b/net/tls/tls_main.c
index b91ddc1..da17641 100644 (file)
--- a/net/tls/tls_main.c
+++ b/net/tls/tls_main.c
@@ -544,7 +544,7 @@ static int do_tls_getsockopt(struct sock *sk, int optname,
                rc = do_tls_getsockopt_conf(sk, optval, optlen,
                                            optname == TLS_TX);
                break;
-       case TLS_TX_ZEROCOPY_SENDFILE:
+       case TLS_TX_ZEROCOPY_RO:
                rc = do_tls_getsockopt_tx_zc(sk, optval, optlen);
                break;
        default:
@@ -731,7 +731,7 @@ static int do_tls_setsockopt(struct sock *sk, int optname, sockptr_t optval,
                                            optname == TLS_TX);
                release_sock(sk);
                break;
-       case TLS_TX_ZEROCOPY_SENDFILE:
+       case TLS_TX_ZEROCOPY_RO:
                lock_sock(sk);
                rc = do_tls_setsockopt_tx_zc(sk, optval, optlen);
                release_sock(sk);
@@ -970,7 +970,7 @@ static int tls_get_info(const struct sock *sk, struct sk_buff *skb)
                goto nla_failure;
 
        if (ctx->tx_conf == TLS_HW && ctx->zerocopy_sendfile) {
-               err = nla_put_flag(skb, TLS_INFO_ZC_SENDFILE);
+               err = nla_put_flag(skb, TLS_INFO_ZC_RO_TX);
                if (err)
                        goto nla_failure;
        }
@@ -994,7 +994,7 @@ static size_t tls_get_info_size(const struct sock *sk)
                nla_total_size(sizeof(u16)) +   /* TLS_INFO_CIPHER */
                nla_total_size(sizeof(u16)) +   /* TLS_INFO_RXCONF */
                nla_total_size(sizeof(u16)) +   /* TLS_INFO_TXCONF */
-               nla_total_size(0) +             /* TLS_INFO_ZC_SENDFILE */
+               nla_total_size(0) +             /* TLS_INFO_ZC_RO_TX */
                0;
 
        return size;