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Merge branch 'tls-cleanups'

Browse source 
Sabrina Dubroca says:

====================
net: tls: various code cleanups and improvements

This series contains multiple cleanups and simplifications for the
config code of both TLS_SW and TLS_HW.

It also modifies the chcr_ktls driver to use driver_state like all
other drivers, so that we can then make driver_state fixed size
instead of a flex array always allocated to that same fixed size. As
reported by Gustavo A. R. Silva, the way chcr_ktls misuses
driver_state irritates GCC [1].

Patches 1 and 2 are follow-ups to my previous cipher_desc series.

[1] https://lore.kernel.org/netdev/ZRvzdlvlbX4+eIln@work/
====================

Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2023-10-13 11:26:11 +01:00
commit 35715ac13a
8 changed files with 246 additions and 254 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

43
drivers/net/ethernet/chelsio/inline_crypto/ch_ktls/chcr_ktls.c
View file

@ -361,9 +361,7 @@ static void chcr_ktls_dev_del(struct net_device *netdev,
struct tls_context *tls_ctx,
enum tls_offload_ctx_dir direction)
{
struct chcr_ktls_ofld_ctx_tx *tx_ctx =
chcr_get_ktls_tx_context(tls_ctx);
struct chcr_ktls_info *tx_info = tx_ctx->chcr_info;
struct chcr_ktls_info *tx_info = chcr_get_ktls_tx_info(tls_ctx);
struct ch_ktls_port_stats_debug *port_stats;
struct chcr_ktls_uld_ctx *u_ctx;
@ -396,7 +394,7 @@ static void chcr_ktls_dev_del(struct net_device *netdev,
port_stats = &tx_info->adap->ch_ktls_stats.ktls_port[tx_info->port_id];
atomic64_inc(&port_stats->ktls_tx_connection_close);
kvfree(tx_info);
tx_ctx->chcr_info = NULL;
chcr_set_ktls_tx_info(tls_ctx, NULL);
/* release module refcount */
module_put(THIS_MODULE);
}
@ -417,7 +415,6 @@ static int chcr_ktls_dev_add(struct net_device *netdev, struct sock *sk,
{
struct tls_context *tls_ctx = tls_get_ctx(sk);
struct ch_ktls_port_stats_debug *port_stats;
struct chcr_ktls_ofld_ctx_tx *tx_ctx;
struct chcr_ktls_uld_ctx *u_ctx;
struct chcr_ktls_info *tx_info;
struct dst_entry *dst;
@ -427,8 +424,6 @@ static int chcr_ktls_dev_add(struct net_device *netdev, struct sock *sk,
u8 daaddr[16];
int ret = -1;
tx_ctx = chcr_get_ktls_tx_context(tls_ctx);
pi = netdev_priv(netdev);
adap = pi->adapter;
port_stats = &adap->ch_ktls_stats.ktls_port[pi->port_id];
@ -440,7 +435,7 @@ static int chcr_ktls_dev_add(struct net_device *netdev, struct sock *sk,
goto out;
}
if (tx_ctx->chcr_info)
if (chcr_get_ktls_tx_info(tls_ctx))
goto out;
if (u_ctx && u_ctx->detach)
@ -566,7 +561,7 @@ static int chcr_ktls_dev_add(struct net_device *netdev, struct sock *sk,
goto free_tid;
atomic64_inc(&port_stats->ktls_tx_ctx);
tx_ctx->chcr_info = tx_info;
chcr_set_ktls_tx_info(tls_ctx, tx_info);
return 0;
@ -647,7 +642,7 @@ static int chcr_ktls_cpl_act_open_rpl(struct adapter *adap,
{
const struct cpl_act_open_rpl *p = (void *)input;
struct chcr_ktls_info *tx_info = NULL;
struct chcr_ktls_ofld_ctx_tx *tx_ctx;
struct tls_offload_context_tx *tx_ctx;
struct chcr_ktls_uld_ctx *u_ctx;
unsigned int atid, tid, status;
struct tls_context *tls_ctx;
@ -686,7 +681,7 @@ static int chcr_ktls_cpl_act_open_rpl(struct adapter *adap,
cxgb4_insert_tid(t, tx_info, tx_info->tid, tx_info->ip_family);
/* Adding tid */
tls_ctx = tls_get_ctx(tx_info->sk);
tx_ctx = chcr_get_ktls_tx_context(tls_ctx);
tx_ctx = tls_offload_ctx_tx(tls_ctx);
u_ctx = adap->uld[CXGB4_ULD_KTLS].handle;
if (u_ctx) {
ret = xa_insert_bh(&u_ctx->tid_list, tid, tx_ctx,
@ -1924,7 +1919,7 @@ static int chcr_ktls_xmit(struct sk_buff *skb, struct net_device *dev)
{
u32 tls_end_offset, tcp_seq, skb_data_len, skb_offset;
struct ch_ktls_port_stats_debug *port_stats;
struct chcr_ktls_ofld_ctx_tx *tx_ctx;
struct tls_offload_context_tx *tx_ctx;
struct ch_ktls_stats_debug *stats;
struct tcphdr *th = tcp_hdr(skb);
int data_len, qidx, ret = 0, mss;
@ -1944,6 +1939,7 @@ static int chcr_ktls_xmit(struct sk_buff *skb, struct net_device *dev)
mss = skb_is_gso(skb) ? skb_shinfo(skb)->gso_size : data_len;
tls_ctx = tls_get_ctx(skb->sk);
tx_ctx = tls_offload_ctx_tx(tls_ctx);
tls_netdev = rcu_dereference_bh(tls_ctx->netdev);
/* Don't quit on NULL: if tls_device_down is running in parallel,
* netdev might become NULL, even if tls_is_skb_tx_device_offloaded was
@ -1952,8 +1948,7 @@ static int chcr_ktls_xmit(struct sk_buff *skb, struct net_device *dev)
if (unlikely(tls_netdev && tls_netdev != dev))
goto out;
tx_ctx = chcr_get_ktls_tx_context(tls_ctx);
tx_info = tx_ctx->chcr_info;
tx_info = chcr_get_ktls_tx_info(tls_ctx);
if (unlikely(!tx_info))
goto out;
@ -1979,19 +1974,19 @@ static int chcr_ktls_xmit(struct sk_buff *skb, struct net_device *dev)
* we will send the complete record again.
*/
spin_lock_irqsave(&tx_ctx->base.lock, flags);
spin_lock_irqsave(&tx_ctx->lock, flags);
do {
cxgb4_reclaim_completed_tx(adap, &q->q, true);
/* fetch the tls record */
record = tls_get_record(&tx_ctx->base, tcp_seq,
record = tls_get_record(tx_ctx, tcp_seq,
&tx_info->record_no);
/* By the time packet reached to us, ACK is received, and record
* won't be found in that case, handle it gracefully.
*/
if (unlikely(!record)) {
spin_unlock_irqrestore(&tx_ctx->base.lock, flags);
spin_unlock_irqrestore(&tx_ctx->lock, flags);
atomic64_inc(&port_stats->ktls_tx_drop_no_sync_data);
goto out;
}
@ -2015,7 +2010,7 @@ static int chcr_ktls_xmit(struct sk_buff *skb, struct net_device *dev)
tls_end_offset !=
record->len);
if (ret) {
spin_unlock_irqrestore(&tx_ctx->base.lock,
spin_unlock_irqrestore(&tx_ctx->lock,
flags);
goto out;
}
@ -2046,7 +2041,7 @@ static int chcr_ktls_xmit(struct sk_buff *skb, struct net_device *dev)
/* free the refcount taken earlier */
if (tls_end_offset < data_len)
dev_kfree_skb_any(skb);
spin_unlock_irqrestore(&tx_ctx->base.lock, flags);
spin_unlock_irqrestore(&tx_ctx->lock, flags);
goto out;
}
@ -2082,7 +2077,7 @@ static int chcr_ktls_xmit(struct sk_buff *skb, struct net_device *dev)
/* if any failure, come out from the loop. */
if (ret) {
spin_unlock_irqrestore(&tx_ctx->base.lock, flags);
spin_unlock_irqrestore(&tx_ctx->lock, flags);
if (th->fin)
dev_kfree_skb_any(skb);
@ -2097,7 +2092,7 @@ static int chcr_ktls_xmit(struct sk_buff *skb, struct net_device *dev)
} while (data_len > 0);
spin_unlock_irqrestore(&tx_ctx->base.lock, flags);
spin_unlock_irqrestore(&tx_ctx->lock, flags);
atomic64_inc(&port_stats->ktls_tx_encrypted_packets);
atomic64_add(skb_data_len, &port_stats->ktls_tx_encrypted_bytes);
@ -2185,17 +2180,17 @@ static void clear_conn_resources(struct chcr_ktls_info *tx_info)
static void ch_ktls_reset_all_conn(struct chcr_ktls_uld_ctx *u_ctx)
{
struct ch_ktls_port_stats_debug *port_stats;
struct chcr_ktls_ofld_ctx_tx *tx_ctx;
struct tls_offload_context_tx *tx_ctx;
struct chcr_ktls_info *tx_info;
unsigned long index;
xa_for_each(&u_ctx->tid_list, index, tx_ctx) {
tx_info = tx_ctx->chcr_info;
tx_info = __chcr_get_ktls_tx_info(tx_ctx);
clear_conn_resources(tx_info);
port_stats = &tx_info->adap->ch_ktls_stats.ktls_port[tx_info->port_id];
atomic64_inc(&port_stats->ktls_tx_connection_close);
kvfree(tx_info);
tx_ctx->chcr_info = NULL;
memset(tx_ctx->driver_state, 0, TLS_DRIVER_STATE_SIZE_TX);
/* release module refcount */
module_put(THIS_MODULE);
}

36
drivers/net/ethernet/chelsio/inline_crypto/ch_ktls/chcr_ktls.h
View file

@ -67,8 +67,7 @@ struct chcr_ktls_info {
bool pending_close;
};
struct chcr_ktls_ofld_ctx_tx {
struct tls_offload_context_tx base;
struct chcr_ktls_ctx_tx {
struct chcr_ktls_info *chcr_info;
};
@ -79,14 +78,33 @@ struct chcr_ktls_uld_ctx {
bool detach;
};
static inline struct chcr_ktls_ofld_ctx_tx *
chcr_get_ktls_tx_context(struct tls_context *tls_ctx)
static inline struct chcr_ktls_info *
__chcr_get_ktls_tx_info(struct tls_offload_context_tx *octx)
{
BUILD_BUG_ON(sizeof(struct chcr_ktls_ofld_ctx_tx) >
TLS_OFFLOAD_CONTEXT_SIZE_TX);
return container_of(tls_offload_ctx_tx(tls_ctx),
struct chcr_ktls_ofld_ctx_tx,
base);
struct chcr_ktls_ctx_tx *priv_ctx;
BUILD_BUG_ON(sizeof(struct chcr_ktls_ctx_tx) > TLS_DRIVER_STATE_SIZE_TX);
priv_ctx = (struct chcr_ktls_ctx_tx *)octx->driver_state;
return priv_ctx->chcr_info;
}
static inline struct chcr_ktls_info *
chcr_get_ktls_tx_info(struct tls_context *tls_ctx)
{
struct chcr_ktls_ctx_tx *priv_ctx;
BUILD_BUG_ON(sizeof(struct chcr_ktls_ctx_tx) > TLS_DRIVER_STATE_SIZE_TX);
priv_ctx = (struct chcr_ktls_ctx_tx *)__tls_driver_ctx(tls_ctx, TLS_OFFLOAD_CTX_DIR_TX);
return priv_ctx->chcr_info;
}
static inline void
chcr_set_ktls_tx_info(struct tls_context *tls_ctx, struct chcr_ktls_info *chcr_info)
{
struct chcr_ktls_ctx_tx *priv_ctx;
priv_ctx = __tls_driver_ctx(tls_ctx, TLS_OFFLOAD_CTX_DIR_TX);
priv_ctx->chcr_info = chcr_info;
}
static inline int chcr_get_first_rx_qid(struct adapter *adap)

21
include/net/tls.h
View file

@ -61,7 +61,8 @@ struct tls_rec;
#define TLS_AAD_SPACE_SIZE 13
#define MAX_IV_SIZE 16
#define TLS_MAX_IV_SIZE 16
#define TLS_MAX_SALT_SIZE 4
#define TLS_TAG_SIZE 16
#define TLS_MAX_REC_SEQ_SIZE 8
#define TLS_MAX_AAD_SIZE TLS_AAD_SPACE_SIZE
@ -149,6 +150,7 @@ struct tls_record_info {
skb_frag_t frags[MAX_SKB_FRAGS];
};
#define TLS_DRIVER_STATE_SIZE_TX 16
struct tls_offload_context_tx {
struct crypto_aead *aead_send;
spinlock_t lock; /* protects records list */
@ -162,17 +164,13 @@ struct tls_offload_context_tx {
void (*sk_destruct)(struct sock *sk);
struct work_struct destruct_work;
struct tls_context *ctx;
u8 driver_state[] __aligned(8);
/* The TLS layer reserves room for driver specific state
* Currently the belief is that there is not enough
* driver specific state to justify another layer of indirection
*/
#define TLS_DRIVER_STATE_SIZE_TX 16
u8 driver_state[TLS_DRIVER_STATE_SIZE_TX] __aligned(8);
};
#define TLS_OFFLOAD_CONTEXT_SIZE_TX \
(sizeof(struct tls_offload_context_tx) + TLS_DRIVER_STATE_SIZE_TX)
enum tls_context_flags {
/* tls_device_down was called after the netdev went down, device state
* was released, and kTLS works in software, even though rx_conf is
@ -193,8 +191,8 @@ enum tls_context_flags {
};
struct cipher_context {
char *iv;
char *rec_seq;
char iv[TLS_MAX_IV_SIZE + TLS_MAX_SALT_SIZE];
char rec_seq[TLS_MAX_REC_SEQ_SIZE];
};
union tls_crypto_context {
@ -302,6 +300,7 @@ struct tls_offload_resync_async {
u32 log[TLS_DEVICE_RESYNC_ASYNC_LOGMAX];
};
#define TLS_DRIVER_STATE_SIZE_RX 8
struct tls_offload_context_rx {
/* sw must be the first member of tls_offload_context_rx */
struct tls_sw_context_rx sw;
@ -325,17 +324,13 @@ struct tls_offload_context_rx {
struct tls_offload_resync_async *resync_async;
};
};
u8 driver_state[] __aligned(8);
/* The TLS layer reserves room for driver specific state
* Currently the belief is that there is not enough
* driver specific state to justify another layer of indirection
*/
#define TLS_DRIVER_STATE_SIZE_RX 8
u8 driver_state[TLS_DRIVER_STATE_SIZE_RX] __aligned(8);
};
#define TLS_OFFLOAD_CONTEXT_SIZE_RX \
(sizeof(struct tls_offload_context_rx) + TLS_DRIVER_STATE_SIZE_RX)
struct tls_record_info *tls_get_record(struct tls_offload_context_tx *context,
u32 seq, u64 *p_record_sn);

12
net/tls/tls.h
View file

@ -127,7 +127,7 @@ struct tls_rec {
struct sock *sk;
char aad_space[TLS_AAD_SPACE_SIZE];
u8 iv_data[MAX_IV_SIZE];
u8 iv_data[TLS_MAX_IV_SIZE];
struct aead_request aead_req;
u8 aead_req_ctx[];
};
@ -142,7 +142,11 @@ void update_sk_prot(struct sock *sk, struct tls_context *ctx);
int wait_on_pending_writer(struct sock *sk, long *timeo);
void tls_err_abort(struct sock *sk, int err);
int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx);
int init_prot_info(struct tls_prot_info *prot,
const struct tls_crypto_info *crypto_info,
const struct tls_cipher_desc *cipher_desc,
int mode);
int tls_set_sw_offload(struct sock *sk, int tx);
void tls_update_rx_zc_capable(struct tls_context *tls_ctx);
void tls_sw_strparser_arm(struct sock *sk, struct tls_context *ctx);
void tls_sw_strparser_done(struct tls_context *tls_ctx);
@ -223,7 +227,7 @@ static inline bool tls_strp_msg_mixed_decrypted(struct tls_sw_context_rx *ctx)
#ifdef CONFIG_TLS_DEVICE
int tls_device_init(void);
void tls_device_cleanup(void);
int tls_set_device_offload(struct sock *sk, struct tls_context *ctx);
int tls_set_device_offload(struct sock *sk);
void tls_device_free_resources_tx(struct sock *sk);
int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx);
void tls_device_offload_cleanup_rx(struct sock *sk);
@ -234,7 +238,7 @@ static inline int tls_device_init(void) { return 0; }
static inline void tls_device_cleanup(void) {}
static inline int
tls_set_device_offload(struct sock *sk, struct tls_context *ctx)
tls_set_device_offload(struct sock *sk)
{
return -EOPNOTSUPP;
}

101
net/tls/tls_device.c
View file

@ -56,11 +56,8 @@ static struct page *dummy_page;
static void tls_device_free_ctx(struct tls_context *ctx)
{
if (ctx->tx_conf == TLS_HW) {
if (ctx->tx_conf == TLS_HW)
kfree(tls_offload_ctx_tx(ctx));
kfree(ctx->tx.rec_seq);
kfree(ctx->tx.iv);
}
if (ctx->rx_conf == TLS_HW)
kfree(tls_offload_ctx_rx(ctx));
@ -891,14 +888,8 @@ tls_device_reencrypt(struct sock *sk, struct tls_context *tls_ctx)
struct strp_msg *rxm;
char *orig_buf, *buf;
switch (tls_ctx->crypto_recv.info.cipher_type) {
case TLS_CIPHER_AES_GCM_128:
case TLS_CIPHER_AES_GCM_256:
break;
default:
return -EINVAL;
}
cipher_desc = get_cipher_desc(tls_ctx->crypto_recv.info.cipher_type);
DEBUG_NET_WARN_ON_ONCE(!cipher_desc || !cipher_desc->offloadable);
rxm = strp_msg(tls_strp_msg(sw_ctx));
orig_buf = kmalloc(rxm->full_len + TLS_HEADER_SIZE + cipher_desc->iv,
@ -1042,22 +1033,45 @@ static void tls_device_attach(struct tls_context *ctx, struct sock *sk,
}
}
int tls_set_device_offload(struct sock *sk, struct tls_context *ctx)
static struct tls_offload_context_tx *alloc_offload_ctx_tx(struct tls_context *ctx)
{
struct tls_offload_context_tx *offload_ctx;
__be64 rcd_sn;
offload_ctx = kzalloc(sizeof(*offload_ctx), GFP_KERNEL);
if (!offload_ctx)
return NULL;
INIT_WORK(&offload_ctx->destruct_work, tls_device_tx_del_task);
INIT_LIST_HEAD(&offload_ctx->records_list);
spin_lock_init(&offload_ctx->lock);
sg_init_table(offload_ctx->sg_tx_data,
ARRAY_SIZE(offload_ctx->sg_tx_data));
/* start at rec_seq - 1 to account for the start marker record */
memcpy(&rcd_sn, ctx->tx.rec_seq, sizeof(rcd_sn));
offload_ctx->unacked_record_sn = be64_to_cpu(rcd_sn) - 1;
offload_ctx->ctx = ctx;
return offload_ctx;
}
int tls_set_device_offload(struct sock *sk)
{
struct tls_context *tls_ctx = tls_get_ctx(sk);
struct tls_prot_info *prot = &tls_ctx->prot_info;
const struct tls_cipher_desc *cipher_desc;
struct tls_record_info *start_marker_record;
struct tls_offload_context_tx *offload_ctx;
const struct tls_cipher_desc *cipher_desc;
struct tls_crypto_info *crypto_info;
struct tls_prot_info *prot;
struct net_device *netdev;
char *iv, *rec_seq;
struct tls_context *ctx;
struct sk_buff *skb;
__be64 rcd_sn;
char *iv, *rec_seq;
int rc;
if (!ctx)
return -EINVAL;
ctx = tls_get_ctx(sk);
prot = &ctx->prot_info;
if (ctx->priv_ctx_tx)
return -EEXIST;
@ -1085,38 +1099,23 @@ int tls_set_device_offload(struct sock *sk, struct tls_context *ctx)
goto release_netdev;
}
rc = init_prot_info(prot, crypto_info, cipher_desc, TLS_HW);
if (rc)
goto release_netdev;
iv = crypto_info_iv(crypto_info, cipher_desc);
rec_seq = crypto_info_rec_seq(crypto_info, cipher_desc);
prot->version = crypto_info->version;
prot->cipher_type = crypto_info->cipher_type;
prot->prepend_size = TLS_HEADER_SIZE + cipher_desc->iv;
prot->tag_size = cipher_desc->tag;
prot->overhead_size = prot->prepend_size + prot->tag_size;
prot->iv_size = cipher_desc->iv;
prot->salt_size = cipher_desc->salt;
ctx->tx.iv = kmalloc(cipher_desc->iv + cipher_desc->salt, GFP_KERNEL);
if (!ctx->tx.iv) {
rc = -ENOMEM;
goto release_netdev;
}
memcpy(ctx->tx.iv + cipher_desc->salt, iv, cipher_desc->iv);
prot->rec_seq_size = cipher_desc->rec_seq;
ctx->tx.rec_seq = kmemdup(rec_seq, cipher_desc->rec_seq, GFP_KERNEL);
if (!ctx->tx.rec_seq) {
rc = -ENOMEM;
goto free_iv;
}
memcpy(ctx->tx.rec_seq, rec_seq, cipher_desc->rec_seq);
start_marker_record = kmalloc(sizeof(*start_marker_record), GFP_KERNEL);
if (!start_marker_record) {
rc = -ENOMEM;
goto free_rec_seq;
goto release_netdev;
}
offload_ctx = kzalloc(TLS_OFFLOAD_CONTEXT_SIZE_TX, GFP_KERNEL);
offload_ctx = alloc_offload_ctx_tx(ctx);
if (!offload_ctx) {
rc = -ENOMEM;
goto free_marker_record;
@ -1126,22 +1125,10 @@ int tls_set_device_offload(struct sock *sk, struct tls_context *ctx)
if (rc)
goto free_offload_ctx;
/* start at rec_seq - 1 to account for the start marker record */
memcpy(&rcd_sn, ctx->tx.rec_seq, sizeof(rcd_sn));
offload_ctx->unacked_record_sn = be64_to_cpu(rcd_sn) - 1;
start_marker_record->end_seq = tcp_sk(sk)->write_seq;
start_marker_record->len = 0;
start_marker_record->num_frags = 0;
INIT_WORK(&offload_ctx->destruct_work, tls_device_tx_del_task);
offload_ctx->ctx = ctx;
INIT_LIST_HEAD(&offload_ctx->records_list);
list_add_tail(&start_marker_record->list, &offload_ctx->records_list);
spin_lock_init(&offload_ctx->lock);
sg_init_table(offload_ctx->sg_tx_data,
ARRAY_SIZE(offload_ctx->sg_tx_data));
clean_acked_data_enable(inet_csk(sk), &tls_icsk_clean_acked);
ctx->push_pending_record = tls_device_push_pending_record;
@ -1198,10 +1185,6 @@ int tls_set_device_offload(struct sock *sk, struct tls_context *ctx)
ctx->priv_ctx_tx = NULL;
free_marker_record:
kfree(start_marker_record);
free_rec_seq:
kfree(ctx->tx.rec_seq);
free_iv:
kfree(ctx->tx.iv);
release_netdev:
dev_put(netdev);
return rc;
@ -1242,7 +1225,7 @@ int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx)
goto release_lock;
}
context = kzalloc(TLS_OFFLOAD_CONTEXT_SIZE_RX, GFP_KERNEL);
context = kzalloc(sizeof(*context), GFP_KERNEL);
if (!context) {
rc = -ENOMEM;
goto release_lock;
@ -1250,7 +1233,7 @@ int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx)
context->resync_nh_reset = 1;
ctx->priv_ctx_rx = context;
rc = tls_set_sw_offload(sk, ctx, 0);
rc = tls_set_sw_offload(sk, 0);
if (rc)
goto release_ctx;

23
net/tls/tls_device_fallback.c
View file

@ -54,7 +54,7 @@ static int tls_enc_record(struct aead_request *aead_req,
struct scatter_walk *out, int *in_len,
struct tls_prot_info *prot)
{
unsigned char buf[TLS_HEADER_SIZE + MAX_IV_SIZE];
unsigned char buf[TLS_HEADER_SIZE + TLS_MAX_IV_SIZE];
const struct tls_cipher_desc *cipher_desc;
struct scatterlist sg_in[3];
struct scatterlist sg_out[3];
@ -62,14 +62,8 @@ static int tls_enc_record(struct aead_request *aead_req,
u16 len;
int rc;
switch (prot->cipher_type) {
case TLS_CIPHER_AES_GCM_128:
case TLS_CIPHER_AES_GCM_256:
break;
default:
return -EINVAL;
}
cipher_desc = get_cipher_desc(prot->cipher_type);
DEBUG_NET_WARN_ON_ONCE(!cipher_desc || !cipher_desc->offloadable);
buf_size = TLS_HEADER_SIZE + cipher_desc->iv;
len = min_t(int, *in_len, buf_size);
@ -338,17 +332,9 @@ static struct sk_buff *tls_enc_skb(struct tls_context *tls_ctx,
if (!aead_req)
return NULL;
switch (tls_ctx->crypto_send.info.cipher_type) {
case TLS_CIPHER_AES_GCM_128:
salt = tls_ctx->crypto_send.aes_gcm_128.salt;
break;
case TLS_CIPHER_AES_GCM_256:
salt = tls_ctx->crypto_send.aes_gcm_256.salt;
break;
default:
goto free_req;
}
cipher_desc = get_cipher_desc(tls_ctx->crypto_send.info.cipher_type);
DEBUG_NET_WARN_ON_ONCE(!cipher_desc || !cipher_desc->offloadable);
buf_len = cipher_desc->salt + cipher_desc->iv + TLS_AAD_SPACE_SIZE +
sync_size + cipher_desc->tag;
buf = kmalloc(buf_len, GFP_ATOMIC);
@ -356,6 +342,7 @@ static struct sk_buff *tls_enc_skb(struct tls_context *tls_ctx,
goto free_req;
iv = buf;
salt = crypto_info_salt(&tls_ctx->crypto_send.info, cipher_desc);
memcpy(iv, salt, cipher_desc->salt);
aad = buf + cipher_desc->salt + cipher_desc->iv;
dummy_buf = aad + TLS_AAD_SPACE_SIZE;

62
net/tls/tls_main.c
View file

@ -59,7 +59,8 @@ enum {
};
#define CHECK_CIPHER_DESC(cipher,ci) \
static_assert(cipher ## _IV_SIZE <= MAX_IV_SIZE); \
static_assert(cipher ## _IV_SIZE <= TLS_MAX_IV_SIZE); \
static_assert(cipher ## _SALT_SIZE <= TLS_MAX_SALT_SIZE); \
static_assert(cipher ## _REC_SEQ_SIZE <= TLS_MAX_REC_SEQ_SIZE); \
static_assert(cipher ## _TAG_SIZE == TLS_TAG_SIZE); \
static_assert(sizeof_field(struct ci, iv) == cipher ## _IV_SIZE); \
@ -344,8 +345,6 @@ static void tls_sk_proto_cleanup(struct sock *sk,
/* We need these for tls_sw_fallback handling of other packets */
if (ctx->tx_conf == TLS_SW) {
kfree(ctx->tx.rec_seq);
kfree(ctx->tx.iv);
tls_sw_release_resources_tx(sk);
TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXSW);
} else if (ctx->tx_conf == TLS_HW) {
@ -581,6 +580,31 @@ static int tls_getsockopt(struct sock *sk, int level, int optname,
return do_tls_getsockopt(sk, optname, optval, optlen);
}
static int validate_crypto_info(const struct tls_crypto_info *crypto_info,
const struct tls_crypto_info *alt_crypto_info)
{
if (crypto_info->version != TLS_1_2_VERSION &&
crypto_info->version != TLS_1_3_VERSION)
return -EINVAL;
switch (crypto_info->cipher_type) {
case TLS_CIPHER_ARIA_GCM_128:
case TLS_CIPHER_ARIA_GCM_256:
if (crypto_info->version != TLS_1_2_VERSION)
return -EINVAL;
break;
}
/* Ensure that TLS version and ciphers are same in both directions */
if (TLS_CRYPTO_INFO_READY(alt_crypto_info)) {
if (alt_crypto_info->version != crypto_info->version ||
alt_crypto_info->cipher_type != crypto_info->cipher_type)
return -EINVAL;
}
return 0;
}
static int do_tls_setsockopt_conf(struct sock *sk, sockptr_t optval,
unsigned int optlen, int tx)
{
@ -612,21 +636,9 @@ static int do_tls_setsockopt_conf(struct sock *sk, sockptr_t optval,
goto err_crypto_info;
}
/* check version */
if (crypto_info->version != TLS_1_2_VERSION &&
crypto_info->version != TLS_1_3_VERSION) {
rc = -EINVAL;
rc = validate_crypto_info(crypto_info, alt_crypto_info);
if (rc)
goto err_crypto_info;
}
/* Ensure that TLS version and ciphers are same in both directions */
if (TLS_CRYPTO_INFO_READY(alt_crypto_info)) {
if (alt_crypto_info->version != crypto_info->version ||
alt_crypto_info->cipher_type != crypto_info->cipher_type) {
rc = -EINVAL;
goto err_crypto_info;
}
}
cipher_desc = get_cipher_desc(crypto_info->cipher_type);
if (!cipher_desc) {
@ -634,16 +646,6 @@ static int do_tls_setsockopt_conf(struct sock *sk, sockptr_t optval,
goto err_crypto_info;
}
switch (crypto_info->cipher_type) {
case TLS_CIPHER_ARIA_GCM_128:
case TLS_CIPHER_ARIA_GCM_256:
if (crypto_info->version != TLS_1_2_VERSION) {
rc = -EINVAL;
goto err_crypto_info;
}
break;
}
if (optlen != cipher_desc->crypto_info) {
rc = -EINVAL;
goto err_crypto_info;
@ -658,13 +660,13 @@ static int do_tls_setsockopt_conf(struct sock *sk, sockptr_t optval,
}
if (tx) {
rc = tls_set_device_offload(sk, ctx);
rc = tls_set_device_offload(sk);
conf = TLS_HW;
if (!rc) {
TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSTXDEVICE);
TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXDEVICE);
} else {
rc = tls_set_sw_offload(sk, ctx, 1);
rc = tls_set_sw_offload(sk, 1);
if (rc)
goto err_crypto_info;
TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSTXSW);
@ -678,7 +680,7 @@ static int do_tls_setsockopt_conf(struct sock *sk, sockptr_t optval,
TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSRXDEVICE);
TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXDEVICE);
} else {
rc = tls_set_sw_offload(sk, ctx, 0);
rc = tls_set_sw_offload(sk, 0);
if (rc)
goto err_crypto_info;
TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSRXSW);

202
net/tls/tls_sw.c
View file

@ -60,7 +60,7 @@ struct tls_decrypt_arg {
struct tls_decrypt_ctx {
struct sock *sk;
u8 iv[MAX_IV_SIZE];
u8 iv[TLS_MAX_IV_SIZE];
u8 aad[TLS_MAX_AAD_SIZE];
u8 tail;
struct scatterlist sg[];
@ -2319,7 +2319,7 @@ int tls_rx_msg_size(struct tls_strparser *strp, struct sk_buff *skb)
{
struct tls_context *tls_ctx = tls_get_ctx(strp->sk);
struct tls_prot_info *prot = &tls_ctx->prot_info;
char header[TLS_HEADER_SIZE + MAX_IV_SIZE];
char header[TLS_HEADER_SIZE + TLS_MAX_IV_SIZE];
size_t cipher_overhead;
size_t data_len = 0;
int ret;
@ -2467,9 +2467,6 @@ void tls_sw_release_resources_rx(struct sock *sk)
struct tls_context *tls_ctx = tls_get_ctx(sk);
struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx);
kfree(tls_ctx->rx.rec_seq);
kfree(tls_ctx->rx.iv);
if (ctx->aead_recv) {
__skb_queue_purge(&ctx->rx_list);
crypto_free_aead(ctx->aead_recv);
@ -2581,84 +2578,54 @@ void tls_update_rx_zc_capable(struct tls_context *tls_ctx)
tls_ctx->prot_info.version != TLS_1_3_VERSION;
}
int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx)
static struct tls_sw_context_tx *init_ctx_tx(struct tls_context *ctx, struct sock *sk)
{
struct tls_context *tls_ctx = tls_get_ctx(sk);
struct tls_prot_info *prot = &tls_ctx->prot_info;
struct tls_crypto_info *crypto_info;
struct tls_sw_context_tx *sw_ctx_tx = NULL;
struct tls_sw_context_rx *sw_ctx_rx = NULL;
struct cipher_context *cctx;
struct crypto_aead **aead;
struct crypto_tfm *tfm;
char *iv, *rec_seq, *key, *salt;
const struct tls_cipher_desc *cipher_desc;
u16 nonce_size;
int rc = 0;
struct tls_sw_context_tx *sw_ctx_tx;
if (!ctx) {
rc = -EINVAL;
goto out;
}
if (tx) {
if (!ctx->priv_ctx_tx) {
sw_ctx_tx = kzalloc(sizeof(*sw_ctx_tx), GFP_KERNEL);
if (!sw_ctx_tx) {
rc = -ENOMEM;
goto out;
}
ctx->priv_ctx_tx = sw_ctx_tx;
} else {
sw_ctx_tx =
(struct tls_sw_context_tx *)ctx->priv_ctx_tx;
}
if (!ctx->priv_ctx_tx) {
sw_ctx_tx = kzalloc(sizeof(*sw_ctx_tx), GFP_KERNEL);
if (!sw_ctx_tx)
return NULL;
} else {
if (!ctx->priv_ctx_rx) {
sw_ctx_rx = kzalloc(sizeof(*sw_ctx_rx), GFP_KERNEL);
if (!sw_ctx_rx) {
rc = -ENOMEM;
goto out;
}
ctx->priv_ctx_rx = sw_ctx_rx;
} else {
sw_ctx_rx =
(struct tls_sw_context_rx *)ctx->priv_ctx_rx;
}
sw_ctx_tx = ctx->priv_ctx_tx;
}
if (tx) {
crypto_init_wait(&sw_ctx_tx->async_wait);
spin_lock_init(&sw_ctx_tx->encrypt_compl_lock);
crypto_info = &ctx->crypto_send.info;
cctx = &ctx->tx;
aead = &sw_ctx_tx->aead_send;
INIT_LIST_HEAD(&sw_ctx_tx->tx_list);
INIT_DELAYED_WORK(&sw_ctx_tx->tx_work.work, tx_work_handler);
sw_ctx_tx->tx_work.sk = sk;
crypto_init_wait(&sw_ctx_tx->async_wait);
spin_lock_init(&sw_ctx_tx->encrypt_compl_lock);
INIT_LIST_HEAD(&sw_ctx_tx->tx_list);
INIT_DELAYED_WORK(&sw_ctx_tx->tx_work.work, tx_work_handler);
sw_ctx_tx->tx_work.sk = sk;
return sw_ctx_tx;
}
static struct tls_sw_context_rx *init_ctx_rx(struct tls_context *ctx)
{
struct tls_sw_context_rx *sw_ctx_rx;
if (!ctx->priv_ctx_rx) {
sw_ctx_rx = kzalloc(sizeof(*sw_ctx_rx), GFP_KERNEL);
if (!sw_ctx_rx)
return NULL;
} else {
crypto_init_wait(&sw_ctx_rx->async_wait);
spin_lock_init(&sw_ctx_rx->decrypt_compl_lock);
init_waitqueue_head(&sw_ctx_rx->wq);
crypto_info = &ctx->crypto_recv.info;
cctx = &ctx->rx;
skb_queue_head_init(&sw_ctx_rx->rx_list);
skb_queue_head_init(&sw_ctx_rx->async_hold);
aead = &sw_ctx_rx->aead_recv;
sw_ctx_rx = ctx->priv_ctx_rx;
}
cipher_desc = get_cipher_desc(crypto_info->cipher_type);
if (!cipher_desc) {
rc = -EINVAL;
goto free_priv;
}
crypto_init_wait(&sw_ctx_rx->async_wait);
spin_lock_init(&sw_ctx_rx->decrypt_compl_lock);
init_waitqueue_head(&sw_ctx_rx->wq);
skb_queue_head_init(&sw_ctx_rx->rx_list);
skb_queue_head_init(&sw_ctx_rx->async_hold);
nonce_size = cipher_desc->nonce;
return sw_ctx_rx;
}
iv = crypto_info_iv(crypto_info, cipher_desc);
key = crypto_info_key(crypto_info, cipher_desc);
salt = crypto_info_salt(crypto_info, cipher_desc);
rec_seq = crypto_info_rec_seq(crypto_info, cipher_desc);
int init_prot_info(struct tls_prot_info *prot,
const struct tls_crypto_info *crypto_info,
const struct tls_cipher_desc *cipher_desc,
int mode)
{
u16 nonce_size = cipher_desc->nonce;
if (crypto_info->version == TLS_1_3_VERSION) {
nonce_size = 0;
@ -2669,42 +2636,89 @@ int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx)
prot->tail_size = 0;
}
/* Sanity-check the sizes for stack allocations. */
if (nonce_size > MAX_IV_SIZE || prot->aad_size > TLS_MAX_AAD_SIZE) {
rc = -EINVAL;
goto free_priv;
if (mode == TLS_HW) {
prot->aad_size = 0;
prot->tail_size = 0;
}
/* Sanity-check the sizes for stack allocations. */
if (nonce_size > TLS_MAX_IV_SIZE || prot->aad_size > TLS_MAX_AAD_SIZE)
return -EINVAL;
prot->version = crypto_info->version;
prot->cipher_type = crypto_info->cipher_type;
prot->prepend_size = TLS_HEADER_SIZE + nonce_size;
prot->tag_size = cipher_desc->tag;
prot->overhead_size = prot->prepend_size +
prot->tag_size + prot->tail_size;
prot->overhead_size = prot->prepend_size + prot->tag_size + prot->tail_size;
prot->iv_size = cipher_desc->iv;
prot->salt_size = cipher_desc->salt;
cctx->iv = kmalloc(cipher_desc->iv + cipher_desc->salt, GFP_KERNEL);
if (!cctx->iv) {
rc = -ENOMEM;
prot->rec_seq_size = cipher_desc->rec_seq;
return 0;
}
int tls_set_sw_offload(struct sock *sk, int tx)
{
struct tls_sw_context_tx *sw_ctx_tx = NULL;
struct tls_sw_context_rx *sw_ctx_rx = NULL;
const struct tls_cipher_desc *cipher_desc;
struct tls_crypto_info *crypto_info;
char *iv, *rec_seq, *key, *salt;
struct cipher_context *cctx;
struct tls_prot_info *prot;
struct crypto_aead **aead;
struct tls_context *ctx;
struct crypto_tfm *tfm;
int rc = 0;
ctx = tls_get_ctx(sk);
prot = &ctx->prot_info;
if (tx) {
ctx->priv_ctx_tx = init_ctx_tx(ctx, sk);
if (!ctx->priv_ctx_tx)
return -ENOMEM;
sw_ctx_tx = ctx->priv_ctx_tx;
crypto_info = &ctx->crypto_send.info;
cctx = &ctx->tx;
aead = &sw_ctx_tx->aead_send;
} else {
ctx->priv_ctx_rx = init_ctx_rx(ctx);
if (!ctx->priv_ctx_rx)
return -ENOMEM;
sw_ctx_rx = ctx->priv_ctx_rx;
crypto_info = &ctx->crypto_recv.info;
cctx = &ctx->rx;
aead = &sw_ctx_rx->aead_recv;
}
cipher_desc = get_cipher_desc(crypto_info->cipher_type);
if (!cipher_desc) {
rc = -EINVAL;
goto free_priv;
}
/* Note: 128 & 256 bit salt are the same size */
prot->rec_seq_size = cipher_desc->rec_seq;
rc = init_prot_info(prot, crypto_info, cipher_desc, TLS_SW);
if (rc)
goto free_priv;
iv = crypto_info_iv(crypto_info, cipher_desc);
key = crypto_info_key(crypto_info, cipher_desc);
salt = crypto_info_salt(crypto_info, cipher_desc);
rec_seq = crypto_info_rec_seq(crypto_info, cipher_desc);
memcpy(cctx->iv, salt, cipher_desc->salt);
memcpy(cctx->iv + cipher_desc->salt, iv, cipher_desc->iv);
cctx->rec_seq = kmemdup(rec_seq, cipher_desc->rec_seq, GFP_KERNEL);
if (!cctx->rec_seq) {
rc = -ENOMEM;
goto free_iv;
}
memcpy(cctx->rec_seq, rec_seq, cipher_desc->rec_seq);
if (!*aead) {
*aead = crypto_alloc_aead(cipher_desc->cipher_name, 0, 0);
if (IS_ERR(*aead)) {
rc = PTR_ERR(*aead);
*aead = NULL;
goto free_rec_seq;
goto free_priv;
}
}
@ -2736,12 +2750,6 @@ int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx)
free_aead:
crypto_free_aead(*aead);
*aead = NULL;
free_rec_seq:
kfree(cctx->rec_seq);
cctx->rec_seq = NULL;
free_iv:
kfree(cctx->iv);
cctx->iv = NULL;
free_priv:
if (tx) {
kfree(ctx->priv_ctx_tx);