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Merge branch 'net-tls-small-code-cleanup'

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Jakub Kicinski says:

====================
net/tls: small code cleanup

This small patch set cleans up tls (mostly offload parts).
Other than avoiding unnecessary error messages - no functional
changes here.

v2 (Saeed):
 - fix up Review tags;
 - remove the warning on failure completely.
====================

Reviewed-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2019-04-27 16:52:22 -04:00
commit c7881b4a97
3 changed files with 38 additions and 50 deletions
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23
include/linux/netdevice.h
View File

@ -914,34 +914,13 @@ struct xfrmdev_ops {
};
#endif
#if IS_ENABLED(CONFIG_TLS_DEVICE)
enum tls_offload_ctx_dir {
TLS_OFFLOAD_CTX_DIR_RX,
TLS_OFFLOAD_CTX_DIR_TX,
};
struct tls_crypto_info;
struct tls_context;
struct tlsdev_ops {
int (*tls_dev_add)(struct net_device *netdev, struct sock *sk,
enum tls_offload_ctx_dir direction,
struct tls_crypto_info *crypto_info,
u32 start_offload_tcp_sn);
void (*tls_dev_del)(struct net_device *netdev,
struct tls_context *ctx,
enum tls_offload_ctx_dir direction);
void (*tls_dev_resync_rx)(struct net_device *netdev,
struct sock *sk, u32 seq, u64 rcd_sn);
};
#endif
struct dev_ifalias {
struct rcu_head rcuhead;
char ifalias[];
};
struct devlink;
struct tlsdev_ops;
/*
* This structure defines the management hooks for network devices.

21
include/net/tls.h
View File

@ -277,6 +277,23 @@ struct tls_context {
void (*unhash)(struct sock *sk);
};
enum tls_offload_ctx_dir {
TLS_OFFLOAD_CTX_DIR_RX,
TLS_OFFLOAD_CTX_DIR_TX,
};
struct tlsdev_ops {
int (*tls_dev_add)(struct net_device *netdev, struct sock *sk,
enum tls_offload_ctx_dir direction,
struct tls_crypto_info *crypto_info,
u32 start_offload_tcp_sn);
void (*tls_dev_del)(struct net_device *netdev,
struct tls_context *ctx,
enum tls_offload_ctx_dir direction);
void (*tls_dev_resync_rx)(struct net_device *netdev,
struct sock *sk, u32 seq, u64 rcd_sn);
};
struct tls_offload_context_rx {
/* sw must be the first member of tls_offload_context_rx */
struct tls_sw_context_rx sw;
@ -317,7 +334,6 @@ int tls_set_device_offload(struct sock *sk, struct tls_context *ctx);
int tls_device_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
int tls_device_sendpage(struct sock *sk, struct page *page,
int offset, size_t size, int flags);
void tls_device_sk_destruct(struct sock *sk);
void tls_device_free_resources_tx(struct sock *sk);
void tls_device_init(void);
void tls_device_cleanup(void);
@ -336,7 +352,6 @@ static inline u32 tls_record_start_seq(struct tls_record_info *rec)
return rec->end_seq - rec->len;
}
void tls_sk_destruct(struct sock *sk, struct tls_context *ctx);
int tls_push_sg(struct sock *sk, struct tls_context *ctx,
struct scatterlist *sg, u16 first_offset,
int flags);
@ -547,7 +562,7 @@ static inline void tls_offload_rx_resync_request(struct sock *sk, __be32 seq)
struct tls_context *tls_ctx = tls_get_ctx(sk);
struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx);
atomic64_set(&rx_ctx->resync_req, ((((uint64_t)seq) << 32) | 1));
atomic64_set(&rx_ctx->resync_req, ((u64)ntohl(seq) << 32) | 1);
}

44
net/tls/tls_device.c
View File

@ -89,22 +89,6 @@ static void tls_device_gc_task(struct work_struct *work)
}
}
static void tls_device_attach(struct tls_context *ctx, struct sock *sk,
struct net_device *netdev)
{
if (sk->sk_destruct != tls_device_sk_destruct) {
refcount_set(&ctx->refcount, 1);
dev_hold(netdev);
ctx->netdev = netdev;
spin_lock_irq(&tls_device_lock);
list_add_tail(&ctx->list, &tls_device_list);
spin_unlock_irq(&tls_device_lock);
ctx->sk_destruct = sk->sk_destruct;
sk->sk_destruct = tls_device_sk_destruct;
}
}
static void tls_device_queue_ctx_destruction(struct tls_context *ctx)
{
unsigned long flags;
@ -199,7 +183,7 @@ static void tls_icsk_clean_acked(struct sock *sk, u32 acked_seq)
* socket and no in-flight SKBs associated with this
* socket, so it is safe to free all the resources.
*/
void tls_device_sk_destruct(struct sock *sk)
static void tls_device_sk_destruct(struct sock *sk)
{
struct tls_context *tls_ctx = tls_get_ctx(sk);
struct tls_offload_context_tx *ctx = tls_offload_ctx_tx(tls_ctx);
@ -217,7 +201,6 @@ void tls_device_sk_destruct(struct sock *sk)
if (refcount_dec_and_test(&tls_ctx->refcount))
tls_device_queue_ctx_destruction(tls_ctx);
}
EXPORT_SYMBOL(tls_device_sk_destruct);
void tls_device_free_resources_tx(struct sock *sk)
{
@ -584,7 +567,7 @@ void handle_device_resync(struct sock *sk, u32 seq, u64 rcd_sn)
rx_ctx = tls_offload_ctx_rx(tls_ctx);
resync_req = atomic64_read(&rx_ctx->resync_req);
req_seq = ntohl(resync_req >> 32) - ((u32)TLS_HEADER_SIZE - 1);
req_seq = (resync_req >> 32) - ((u32)TLS_HEADER_SIZE - 1);
is_req_pending = resync_req;
if (unlikely(is_req_pending) && req_seq == seq &&
@ -682,6 +665,22 @@ int tls_device_decrypted(struct sock *sk, struct sk_buff *skb)
tls_device_reencrypt(sk, skb);
}
static void tls_device_attach(struct tls_context *ctx, struct sock *sk,
struct net_device *netdev)
{
if (sk->sk_destruct != tls_device_sk_destruct) {
refcount_set(&ctx->refcount, 1);
dev_hold(netdev);
ctx->netdev = netdev;
spin_lock_irq(&tls_device_lock);
list_add_tail(&ctx->list, &tls_device_list);
spin_unlock_irq(&tls_device_lock);
ctx->sk_destruct = sk->sk_destruct;
sk->sk_destruct = tls_device_sk_destruct;
}
}
int tls_set_device_offload(struct sock *sk, struct tls_context *ctx)
{
u16 nonce_size, tag_size, iv_size, rec_seq_size;
@ -865,8 +864,6 @@ int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx)
}
if (!(netdev->features & NETIF_F_HW_TLS_RX)) {
pr_err_ratelimited("%s: netdev %s with no TLS offload\n",
__func__, netdev->name);
rc = -ENOTSUPP;
goto release_netdev;
}
@ -894,11 +891,8 @@ int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx)
rc = netdev->tlsdev_ops->tls_dev_add(netdev, sk, TLS_OFFLOAD_CTX_DIR_RX,
&ctx->crypto_recv.info,
tcp_sk(sk)->copied_seq);
if (rc) {
pr_err_ratelimited("%s: The netdev has refused to offload this socket\n",
__func__);
if (rc)
goto free_sw_resources;
}
tls_device_attach(ctx, sk, netdev);
goto release_netdev;