Stefano Garzarella
2021-Jan-08 10:19 UTC
[PATCH 1/5] vsock/virtio: support for SOCK_SEQPACKET socket.
On Sun, Jan 03, 2021 at 10:57:50PM +0300, Arseny Krasnov wrote:> This extends rx loop for SOCK_SEQPACKET packets and implements >callback which user calls to copy data to its buffer.Please write a better commit message explaining the changes, e.g. that you are using 'flags' to transport lengths when 'op' =VIRTIO_VSOCK_OP_SEQ_BEGIN.> >Signed-off-by: Arseny Krasnov <arseny.krasnov at kaspersky.com> >--- > include/linux/virtio_vsock.h | 7 + > include/net/af_vsock.h | 4 + > include/uapi/linux/virtio_vsock.h | 9 + > net/vmw_vsock/virtio_transport.c | 3 + > net/vmw_vsock/virtio_transport_common.c | 323 +++++++++++++++++++++--- > 5 files changed, 305 insertions(+), 41 deletions(-) > >diff --git a/include/linux/virtio_vsock.h b/include/linux/virtio_vsock.h >index dc636b727179..4902d71b3252 100644 >--- a/include/linux/virtio_vsock.h >+++ b/include/linux/virtio_vsock.h >@@ -36,6 +36,10 @@ struct virtio_vsock_sock { > u32 rx_bytes; > u32 buf_alloc; > struct list_head rx_queue; >+ >+ /* For SOCK_SEQPACKET */ >+ u32 user_read_seq_len; >+ u32 user_read_copied; > }; > > struct virtio_vsock_pkt { >@@ -80,6 +84,9 @@ virtio_transport_dgram_dequeue(struct vsock_sock *vsk, > struct msghdr *msg, > size_t len, int flags); > >+bool virtio_transport_seqpacket_seq_send_len(struct vsock_sock *vsk, size_t len); >+size_t virtio_transport_seqpacket_seq_get_len(struct vsock_sock *vsk); >+ > s64 virtio_transport_stream_has_data(struct vsock_sock *vsk); > s64 virtio_transport_stream_has_space(struct vsock_sock *vsk); > >diff --git a/include/net/af_vsock.h b/include/net/af_vsock.h >index b1c717286993..792ea7b66574 100644 >--- a/include/net/af_vsock.h >+++ b/include/net/af_vsock.h >@@ -135,6 +135,10 @@ struct vsock_transport { > bool (*stream_is_active)(struct vsock_sock *); > bool (*stream_allow)(u32 cid, u32 port); > >+ /* SEQ_PACKET. */ >+ bool (*seqpacket_seq_send_len)(struct vsock_sock *, size_t len); >+ size_t (*seqpacket_seq_get_len)(struct vsock_sock *); >+These changes are related to the vsock core, so please move to another patch.> /* Notification. */ > int (*notify_poll_in)(struct vsock_sock *, size_t, bool *); > int (*notify_poll_out)(struct vsock_sock *, size_t, bool *); >diff --git a/include/uapi/linux/virtio_vsock.h b/include/uapi/linux/virtio_vsock.h >index 1d57ed3d84d2..058908bc19fc 100644 >--- a/include/uapi/linux/virtio_vsock.h >+++ b/include/uapi/linux/virtio_vsock.h >@@ -65,6 +65,7 @@ struct virtio_vsock_hdr { > > enum virtio_vsock_type { > VIRTIO_VSOCK_TYPE_STREAM = 1, >+ VIRTIO_VSOCK_TYPE_SEQPACKET = 2, > }; > > enum virtio_vsock_op { >@@ -83,6 +84,9 @@ enum virtio_vsock_op { > VIRTIO_VSOCK_OP_CREDIT_UPDATE = 6, > /* Request the peer to send the credit info to us */ > VIRTIO_VSOCK_OP_CREDIT_REQUEST = 7, >+ >+ /* Record begin for SOCK_SEQPACKET */ >+ VIRTIO_VSOCK_OP_SEQ_BEGIN = 8, > }; > > /* VIRTIO_VSOCK_OP_SHUTDOWN flags values */ >@@ -91,4 +95,9 @@ enum virtio_vsock_shutdown { > VIRTIO_VSOCK_SHUTDOWN_SEND = 2, > }; > >+/* VIRTIO_VSOCK_OP_RW flags values for SOCK_SEQPACKET type */ >+enum virtio_vsock_rw_seqpacket { >+ VIRTIO_VSOCK_RW_EOR = 1, >+}; >+ > #endif /* _UAPI_LINUX_VIRTIO_VSOCK_H */ >diff --git a/net/vmw_vsock/virtio_transport.c b/net/vmw_vsock/virtio_transport.c >index 2700a63ab095..2bd3f7cbffcb 100644 >--- a/net/vmw_vsock/virtio_transport.c >+++ b/net/vmw_vsock/virtio_transport.c >@@ -469,6 +469,9 @@ static struct virtio_transport virtio_transport = { > .stream_is_active = virtio_transport_stream_is_active, > .stream_allow = virtio_transport_stream_allow, > >+ .seqpacket_seq_send_len = virtio_transport_seqpacket_seq_send_len, >+ .seqpacket_seq_get_len = virtio_transport_seqpacket_seq_get_len, >+ > .notify_poll_in = virtio_transport_notify_poll_in, > .notify_poll_out = virtio_transport_notify_poll_out, > .notify_recv_init = virtio_transport_notify_recv_init, >diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common.c >index 5956939eebb7..77c42004e422 100644 >--- a/net/vmw_vsock/virtio_transport_common.c >+++ b/net/vmw_vsock/virtio_transport_common.c >@@ -139,6 +139,7 @@ static struct sk_buff *virtio_transport_build_skb(void *opaque) > break; > case VIRTIO_VSOCK_OP_CREDIT_UPDATE: > case VIRTIO_VSOCK_OP_CREDIT_REQUEST: >+ case VIRTIO_VSOCK_OP_SEQ_BEGIN: > hdr->op = cpu_to_le16(AF_VSOCK_OP_CONTROL); > break; > default: >@@ -157,6 +158,10 @@ static struct sk_buff *virtio_transport_build_skb(void *opaque) > > void virtio_transport_deliver_tap_pkt(struct virtio_vsock_pkt *pkt) > { >+ /* TODO: implement tap support for SOCK_SEQPACKET. */ >+ if (le32_to_cpu(pkt->hdr.type) == VIRTIO_VSOCK_TYPE_SEQPACKET) >+ return; >+ > if (pkt->tap_delivered) > return; > >@@ -230,10 +235,10 @@ static bool virtio_transport_inc_rx_pkt(struct virtio_vsock_sock *vvs, > } > > static void virtio_transport_dec_rx_pkt(struct virtio_vsock_sock *vvs, >- struct virtio_vsock_pkt *pkt) >+ u32 len) > { >- vvs->rx_bytes -= pkt->len; >- vvs->fwd_cnt += pkt->len; >+ vvs->rx_bytes -= len; >+ vvs->fwd_cnt += len; > } > > void virtio_transport_inc_tx_pkt(struct virtio_vsock_sock *vvs, struct virtio_vsock_pkt *pkt) >@@ -365,7 +370,7 @@ virtio_transport_stream_do_dequeue(struct vsock_sock *vsk, > total += bytes; > pkt->off += bytes; > if (pkt->off == pkt->len) { >- virtio_transport_dec_rx_pkt(vvs, pkt); >+ virtio_transport_dec_rx_pkt(vvs, pkt->len); > list_del(&pkt->list); > virtio_transport_free_pkt(pkt); > } >@@ -397,15 +402,202 @@ virtio_transport_stream_do_dequeue(struct vsock_sock *vsk, > return err; > } > >+static u16 virtio_transport_get_type(struct sock *sk) >+{ >+ if (sk->sk_type == SOCK_STREAM) >+ return VIRTIO_VSOCK_TYPE_STREAM; >+ else >+ return VIRTIO_VSOCK_TYPE_SEQPACKET; >+} >+ >+bool virtio_transport_seqpacket_seq_send_len(struct vsock_sock *vsk, size_t len) >+{ >+ struct virtio_vsock_pkt_info info = { >+ .type = VIRTIO_VSOCK_TYPE_SEQPACKET, >+ .op = VIRTIO_VSOCK_OP_SEQ_BEGIN, >+ .vsk = vsk, >+ .flags = len >+ }; >+ >+ return virtio_transport_send_pkt_info(vsk, &info); >+} >+EXPORT_SYMBOL_GPL(virtio_transport_seqpacket_seq_send_len); >+ >+static inline void virtio_transport_del_n_free_pkt(struct virtio_vsock_pkt *pkt) >+{ >+ list_del(&pkt->list); >+ virtio_transport_free_pkt(pkt); >+} >+ >+static size_t virtio_transport_drop_until_seq_begin(struct virtio_vsock_sock *vvs) >+{ >+ struct virtio_vsock_pkt *pkt, *n; >+ size_t bytes_dropped = 0; >+ >+ list_for_each_entry_safe(pkt, n, &vvs->rx_queue, list) { >+ if (le16_to_cpu(pkt->hdr.op) == VIRTIO_VSOCK_OP_SEQ_BEGIN) >+ break; >+ >+ bytes_dropped += le32_to_cpu(pkt->hdr.len); >+ virtio_transport_dec_rx_pkt(vvs, pkt->len); >+ virtio_transport_del_n_free_pkt(pkt); >+ } >+ >+ return bytes_dropped; >+} >+ >+size_t virtio_transport_seqpacket_seq_get_len(struct vsock_sock *vsk) >+{ >+ struct virtio_vsock_sock *vvs = vsk->trans; >+ struct virtio_vsock_pkt *pkt; >+ size_t bytes_dropped; >+ >+ spin_lock_bh(&vvs->rx_lock); >+ >+ /* Fetch all orphaned 'RW', packets, and >+ * send credit update. >+ */ >+ bytes_dropped = virtio_transport_drop_until_seq_begin(vvs); >+ >+ if (list_empty(&vvs->rx_queue)) >+ goto out; >+ >+ pkt = list_first_entry(&vvs->rx_queue, struct virtio_vsock_pkt, list); >+ >+ vvs->user_read_copied = 0; >+ vvs->user_read_seq_len = le32_to_cpu(pkt->hdr.flags); >+ virtio_transport_del_n_free_pkt(pkt); >+out: >+ spin_unlock_bh(&vvs->rx_lock); >+ >+ if (bytes_dropped) >+ virtio_transport_send_credit_update(vsk, >+ VIRTIO_VSOCK_TYPE_SEQPACKET, >+ NULL); >+ >+ return vvs->user_read_seq_len; >+} >+EXPORT_SYMBOL_GPL(virtio_transport_seqpacket_seq_get_len); >+ >+static ssize_t virtio_transport_seqpacket_do_dequeue(struct vsock_sock *vsk, >+ struct msghdr *msg, >+ size_t user_buf_len) >+{ >+ struct virtio_vsock_sock *vvs = vsk->trans; >+ struct virtio_vsock_pkt *pkt; >+ size_t bytes_handled = 0; >+ int err = 0; >+ >+ spin_lock_bh(&vvs->rx_lock); >+ >+ if (user_buf_len == 0) { >+ /* User's buffer is full, we processing rest of >+ * record and drop it. If 'SEQ_BEGIN' is found >+ * while iterating, user will be woken up, >+ * because record is already copied, and we >+ * don't care about absent of some tail RW packets >+ * of it. Return number of bytes(rest of record), >+ * but ignore credit update for such absent bytes. >+ */ >+ bytes_handled = virtio_transport_drop_until_seq_begin(vvs); >+ vvs->user_read_copied += bytes_handled; >+ >+ if (!list_empty(&vvs->rx_queue) && >+ vvs->user_read_copied < vvs->user_read_seq_len) { >+ /* 'SEQ_BEGIN' found, but record isn't complete. >+ * Set number of copied bytes to fit record size >+ * and force counters to finish receiving. >+ */ >+ bytes_handled += (vvs->user_read_seq_len - vvs->user_read_copied); >+ vvs->user_read_copied = vvs->user_read_seq_len; >+ } >+ } >+ >+ /* Now start copying. */ >+ while (vvs->user_read_copied < vvs->user_read_seq_len && >+ vvs->rx_bytes && >+ user_buf_len && >+ !err) { >+ pkt = list_first_entry(&vvs->rx_queue, struct virtio_vsock_pkt, list); >+ >+ switch (le16_to_cpu(pkt->hdr.op)) { >+ case VIRTIO_VSOCK_OP_SEQ_BEGIN: { >+ /* Unexpected 'SEQ_BEGIN' during record copy: >+ * Leave receive loop, 'EAGAIN' will restart it from >+ * outer receive loop, packet is still in queue and >+ * counters are cleared. So in next loop enter, >+ * 'SEQ_BEGIN' will be dequeued first. User's iov >+ * iterator will be reset in outer loop. Also >+ * send credit update, because some bytes could be >+ * copied. User will never see unfinished record. >+ */ >+ err = -EAGAIN; >+ break; >+ } >+ case VIRTIO_VSOCK_OP_RW: { >+ size_t bytes_to_copy; >+ size_t pkt_len; >+ >+ pkt_len = (size_t)le32_to_cpu(pkt->hdr.len); >+ bytes_to_copy = min(user_buf_len, pkt_len); >+ >+ /* sk_lock is held by caller so no one else can dequeue. >+ * Unlock rx_lock since memcpy_to_msg() may sleep. >+ */ >+ spin_unlock_bh(&vvs->rx_lock); >+ >+ if (memcpy_to_msg(msg, pkt->buf, bytes_to_copy)) { >+ spin_lock_bh(&vvs->rx_lock); >+ err = -EINVAL; >+ break; >+ } >+ >+ spin_lock_bh(&vvs->rx_lock); >+ user_buf_len -= bytes_to_copy; >+ bytes_handled += pkt->len; >+ vvs->user_read_copied += bytes_to_copy; >+ >+ if (le16_to_cpu(pkt->hdr.flags) & VIRTIO_VSOCK_RW_EOR) >+ msg->msg_flags |= MSG_EOR; >+ break; >+ } >+ default: >+ ; >+ } >+ >+ /* For unexpected 'SEQ_BEGIN', keep such packet in queue, >+ * but drop any other type of packet. >+ */ >+ if (le16_to_cpu(pkt->hdr.op) != VIRTIO_VSOCK_OP_SEQ_BEGIN) { >+ virtio_transport_dec_rx_pkt(vvs, pkt->len); >+ virtio_transport_del_n_free_pkt(pkt); >+ } >+ } >+ >+ spin_unlock_bh(&vvs->rx_lock); >+ >+ virtio_transport_send_credit_update(vsk, VIRTIO_VSOCK_TYPE_SEQPACKET, >+ NULL); >+ >+ return err ?: bytes_handled; >+} >+ > ssize_t > virtio_transport_stream_dequeue(struct vsock_sock *vsk, > struct msghdr *msg, > size_t len, int flags) > { >- if (flags & MSG_PEEK) >- return virtio_transport_stream_do_peek(vsk, msg, len); >- else >+ if (virtio_transport_get_type(sk_vsock(vsk)) == VIRTIO_VSOCK_TYPE_SEQPACKET) { >+ if (flags & MSG_PEEK) >+ return -EOPNOTSUPP; >+ >+ return virtio_transport_seqpacket_do_dequeue(vsk, msg, len); >+ } else { >+ if (flags & MSG_PEEK) >+ return virtio_transport_stream_do_peek(vsk, msg, >len); >+ > return virtio_transport_stream_do_dequeue(vsk, msg, len); >+ }Maybe is better to create two different functions here since we are using two complete different paths: virtio_transport_stream_dequeue() virtio_transport_seqpacket_dequeue() And adding a new 'seqpacket_dequeue' callback in the transport.> } > EXPORT_SYMBOL_GPL(virtio_transport_stream_dequeue); > >@@ -481,6 +673,8 @@ int virtio_transport_do_socket_init(struct vsock_sock *vsk, > spin_lock_init(&vvs->rx_lock); > spin_lock_init(&vvs->tx_lock); > INIT_LIST_HEAD(&vvs->rx_queue); >+ vvs->user_read_copied = 0; >+ vvs->user_read_seq_len = 0; > > return 0; > } >@@ -490,13 +684,16 @@ EXPORT_SYMBOL_GPL(virtio_transport_do_socket_init); > void virtio_transport_notify_buffer_size(struct vsock_sock *vsk, u64 *val) > { > struct virtio_vsock_sock *vvs = vsk->trans; >+ int type; > > if (*val > VIRTIO_VSOCK_MAX_BUF_SIZE) > *val = VIRTIO_VSOCK_MAX_BUF_SIZE; > > vvs->buf_alloc = *val; > >- virtio_transport_send_credit_update(vsk, VIRTIO_VSOCK_TYPE_STREAM, >+ type = virtio_transport_get_type(sk_vsock(vsk)); >+ >+ virtio_transport_send_credit_update(vsk, type, > NULL);This line can now be merged with the previous one.> } > EXPORT_SYMBOL_GPL(virtio_transport_notify_buffer_size); >@@ -624,10 +821,11 @@ int virtio_transport_connect(struct vsock_sock *vsk) > { > struct virtio_vsock_pkt_info info = { > .op = VIRTIO_VSOCK_OP_REQUEST, >- .type = VIRTIO_VSOCK_TYPE_STREAM, > .vsk = vsk, > }; > >+ info.type = virtio_transport_get_type(sk_vsock(vsk)); >+ > return virtio_transport_send_pkt_info(vsk, &info); > } > EXPORT_SYMBOL_GPL(virtio_transport_connect); >@@ -636,7 +834,6 @@ int virtio_transport_shutdown(struct vsock_sock *vsk, int mode) > { > struct virtio_vsock_pkt_info info = { > .op = VIRTIO_VSOCK_OP_SHUTDOWN, >- .type = VIRTIO_VSOCK_TYPE_STREAM, > .flags = (mode & RCV_SHUTDOWN ? > VIRTIO_VSOCK_SHUTDOWN_RCV : 0) | > (mode & SEND_SHUTDOWN ? >@@ -644,6 +841,8 @@ int virtio_transport_shutdown(struct vsock_sock *vsk, int mode) > .vsk = vsk, > }; > >+ info.type = virtio_transport_get_type(sk_vsock(vsk)); >+ > return virtio_transport_send_pkt_info(vsk, &info); > } > EXPORT_SYMBOL_GPL(virtio_transport_shutdown); >@@ -665,12 +864,18 @@ virtio_transport_stream_enqueue(struct vsock_sock *vsk, > { > struct virtio_vsock_pkt_info info = { > .op = VIRTIO_VSOCK_OP_RW, >- .type = VIRTIO_VSOCK_TYPE_STREAM, > .msg = msg, > .pkt_len = len, > .vsk = vsk, >+ .flags = 0, > }; > >+ info.type = virtio_transport_get_type(sk_vsock(vsk)); >+ >+ if (info.type == VIRTIO_VSOCK_TYPE_SEQPACKET && >+ msg->msg_flags & MSG_EOR) >+ info.flags |= VIRTIO_VSOCK_RW_EOR; >+ > return virtio_transport_send_pkt_info(vsk, &info); > } > EXPORT_SYMBOL_GPL(virtio_transport_stream_enqueue); >@@ -688,7 +893,6 @@ static int virtio_transport_reset(struct vsock_sock *vsk, > { > struct virtio_vsock_pkt_info info = { > .op = VIRTIO_VSOCK_OP_RST, >- .type = VIRTIO_VSOCK_TYPE_STREAM, > .reply = !!pkt, > .vsk = vsk, > }; >@@ -697,6 +901,8 @@ static int virtio_transport_reset(struct vsock_sock *vsk, > if (pkt && le16_to_cpu(pkt->hdr.op) == VIRTIO_VSOCK_OP_RST) > return 0; > >+ info.type = virtio_transport_get_type(sk_vsock(vsk)); >+ > return virtio_transport_send_pkt_info(vsk, &info); > } > >@@ -884,44 +1090,59 @@ virtio_transport_recv_connecting(struct sock *sk, > return err; > } > >-static void >+static bool > virtio_transport_recv_enqueue(struct vsock_sock *vsk, > struct virtio_vsock_pkt *pkt) > { > struct virtio_vsock_sock *vvs = vsk->trans; >- bool can_enqueue, free_pkt = false; >+ bool data_ready = false; >+ bool free_pkt = false; > >- pkt->len = le32_to_cpu(pkt->hdr.len); > pkt->off = 0; >+ pkt->len = le32_to_cpu(pkt->hdr.len); > > spin_lock_bh(&vvs->rx_lock); > >- can_enqueue = virtio_transport_inc_rx_pkt(vvs, pkt); >- if (!can_enqueue) { >- free_pkt = true; >- goto out; >- } >+ switch (le32_to_cpu(pkt->hdr.type)) { >+ case VIRTIO_VSOCK_TYPE_STREAM: { >+ if (!virtio_transport_inc_rx_pkt(vvs, pkt)) { >+ free_pkt = true; >+ goto out; >+ } > >- /* Try to copy small packets into the buffer of last packet queued, >- * to avoid wasting memory queueing the entire buffer with a small >- * payload. >- */ >- if (pkt->len <= GOOD_COPY_LEN && !list_empty(&vvs->rx_queue)) { >- struct virtio_vsock_pkt *last_pkt; >+ /* Try to copy small packets into the buffer of last packet queued, >+ * to avoid wasting memory queueing the entire buffer with a small >+ * payload. >+ */ >+ if (pkt->len <= GOOD_COPY_LEN && !list_empty(&vvs->rx_queue)) { >+ struct virtio_vsock_pkt *last_pkt; > >- last_pkt = list_last_entry(&vvs->rx_queue, >- struct virtio_vsock_pkt, list); >+ last_pkt = list_last_entry(&vvs->rx_queue, >+ struct virtio_vsock_pkt, list); > >- /* If there is space in the last packet queued, we copy the >- * new packet in its buffer. >- */ >- if (pkt->len <= last_pkt->buf_len - last_pkt->len) { >- memcpy(last_pkt->buf + last_pkt->len, pkt->buf, >- pkt->len); >- last_pkt->len += pkt->len; >- free_pkt = true; >- goto out; >+ /* If there is space in the last packet queued, we copy the >+ * new packet in its buffer. >+ */ >+ if (pkt->len <= last_pkt->buf_len - last_pkt->len) { >+ memcpy(last_pkt->buf + last_pkt->len, pkt->buf, >+ pkt->len); >+ last_pkt->len += pkt->len; >+ free_pkt = true; >+ goto out; >+ } > } >+ >+ data_ready = true; >+ break; >+ } >+^ Unnecessary line break.>+ case VIRTIO_VSOCK_TYPE_SEQPACKET: { >+ data_ready = true; >+ vvs->rx_bytes += pkt->len;Why not using virtio_transport_inc_rx_pkt()?>+ break; >+ } >+ default: >+ goto out; > } > > list_add_tail(&pkt->list, &vvs->rx_queue); >@@ -930,6 +1151,8 @@ virtio_transport_recv_enqueue(struct vsock_sock *vsk, > spin_unlock_bh(&vvs->rx_lock); > if (free_pkt) > virtio_transport_free_pkt(pkt); >+ >+ return data_ready; > } > > static int >@@ -940,9 +1163,17 @@ virtio_transport_recv_connected(struct sock *sk, > int err = 0; > > switch (le16_to_cpu(pkt->hdr.op)) { >+ case VIRTIO_VSOCK_OP_SEQ_BEGIN: { >+ struct virtio_vsock_sock *vvs = vsk->trans; >+ >+ spin_lock_bh(&vvs->rx_lock); >+ list_add_tail(&pkt->list, &vvs->rx_queue); >+ spin_unlock_bh(&vvs->rx_lock); >+ return err; >+ } > case VIRTIO_VSOCK_OP_RW: >- virtio_transport_recv_enqueue(vsk, pkt); >- sk->sk_data_ready(sk); >+ if (virtio_transport_recv_enqueue(vsk, pkt)) >+ sk->sk_data_ready(sk); > return err; > case VIRTIO_VSOCK_OP_CREDIT_UPDATE: > sk->sk_write_space(sk); >@@ -990,13 +1221,14 @@ virtio_transport_send_response(struct vsock_sock *vsk, > { > struct virtio_vsock_pkt_info info = { > .op = VIRTIO_VSOCK_OP_RESPONSE, >- .type = VIRTIO_VSOCK_TYPE_STREAM, > .remote_cid = le64_to_cpu(pkt->hdr.src_cid), > .remote_port = le32_to_cpu(pkt->hdr.src_port), > .reply = true, > .vsk = vsk, > }; > >+ info.type = virtio_transport_get_type(sk_vsock(vsk)); >+ > return virtio_transport_send_pkt_info(vsk, &info); > } > >@@ -1086,6 +1318,12 @@ virtio_transport_recv_listen(struct sock *sk, struct virtio_vsock_pkt *pkt, > return 0; > } > >+static bool virtio_transport_valid_type(u16 type) >+{ >+ return (type == VIRTIO_VSOCK_TYPE_STREAM) || >+ (type == VIRTIO_VSOCK_TYPE_SEQPACKET); >+} >+ > /* We are under the virtio-vsock's vsock->rx_lock or vhost-vsock's vq->mutex > * lock. > */ >@@ -1111,7 +1349,7 @@ void virtio_transport_recv_pkt(struct virtio_transport *t, > le32_to_cpu(pkt->hdr.buf_alloc), > le32_to_cpu(pkt->hdr.fwd_cnt)); > >- if (le16_to_cpu(pkt->hdr.type) != VIRTIO_VSOCK_TYPE_STREAM) { >+ if (!virtio_transport_valid_type(le16_to_cpu(pkt->hdr.type))) { > (void)virtio_transport_reset_no_sock(t, pkt); > goto free_pkt; > } >@@ -1128,6 +1366,9 @@ void virtio_transport_recv_pkt(struct virtio_transport *t, > } > } > >+ if (virtio_transport_get_type(sk) != le16_to_cpu(pkt->hdr.type)) >+ goto free_pkt; >+ > vsk = vsock_sk(sk); > > space_available = virtio_transport_space_update(sk, pkt); >-- >2.25.1 >