diff options
Diffstat (limited to 'net/rxrpc/ar-internal.h')
| -rw-r--r-- | net/rxrpc/ar-internal.h | 224 |
1 files changed, 139 insertions, 85 deletions
diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h index 1ad0ec5afb50..0273a9029229 100644 --- a/net/rxrpc/ar-internal.h +++ b/net/rxrpc/ar-internal.h @@ -29,6 +29,7 @@ struct rxrpc_crypt { struct key_preparsed_payload; struct rxrpc_connection; +struct rxrpc_txbuf; /* * Mark applied to socket buffers in skb->mark. skb->priority is used @@ -93,6 +94,22 @@ struct rxrpc_net { struct list_head peer_keepalive_new; struct timer_list peer_keepalive_timer; struct work_struct peer_keepalive_work; + + atomic_t stat_tx_data; + atomic_t stat_tx_data_retrans; + atomic_t stat_tx_data_send; + atomic_t stat_tx_data_send_frag; + atomic_t stat_rx_data; + atomic_t stat_rx_data_reqack; + atomic_t stat_rx_data_jumbo; + + atomic_t stat_tx_ack_fill; + atomic_t stat_tx_ack_send; + atomic_t stat_tx_ack_skip; + atomic_t stat_tx_acks[256]; + atomic_t stat_rx_acks[256]; + + atomic_t stat_why_req_ack[8]; }; /* @@ -178,20 +195,12 @@ struct rxrpc_host_header { * - max 48 bytes (struct sk_buff::cb) */ struct rxrpc_skb_priv { - atomic_t nr_ring_pins; /* Number of rxtx ring pins */ - u8 nr_subpackets; /* Number of subpackets */ - u8 rx_flags; /* Received packet flags */ -#define RXRPC_SKB_INCL_LAST 0x01 /* - Includes last packet */ -#define RXRPC_SKB_TX_BUFFER 0x02 /* - Is transmit buffer */ - union { - int remain; /* amount of space remaining for next write */ - - /* List of requested ACKs on subpackets */ - unsigned long rx_req_ack[(RXRPC_MAX_NR_JUMBO + BITS_PER_LONG - 1) / - BITS_PER_LONG]; - }; + u16 offset; /* Offset of data */ + u16 len; /* Length of data */ + u8 flags; +#define RXRPC_RX_VERIFIED 0x01 - struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ + struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ }; #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) @@ -233,19 +242,14 @@ struct rxrpc_security { size_t *, size_t *, size_t *); /* impose security on a packet */ - int (*secure_packet)(struct rxrpc_call *, struct sk_buff *, size_t); + int (*secure_packet)(struct rxrpc_call *, struct rxrpc_txbuf *); /* verify the security on a received packet */ - int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, - unsigned int, unsigned int, rxrpc_seq_t, u16); + int (*verify_packet)(struct rxrpc_call *, struct sk_buff *); /* Free crypto request on a call */ void (*free_call_crypto)(struct rxrpc_call *); - /* Locate the data in a received packet that has been verified. */ - void (*locate_data)(struct rxrpc_call *, struct sk_buff *, - unsigned int *, unsigned int *); - /* issue a challenge */ int (*issue_challenge)(struct rxrpc_connection *); @@ -276,6 +280,8 @@ struct rxrpc_local { struct hlist_node link; struct socket *socket; /* my UDP socket */ struct work_struct processor; + struct list_head ack_tx_queue; /* List of ACKs that need sending */ + spinlock_t ack_tx_lock; /* ACK list lock */ struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ struct sk_buff_head reject_queue; /* packets awaiting rejection */ @@ -326,7 +332,7 @@ struct rxrpc_peer { u32 rto_j; /* Retransmission timeout in jiffies */ u8 backoff; /* Backoff timeout */ - u8 cong_cwnd; /* Congestion window size */ + u8 cong_ssthresh; /* Congestion slow-start threshold */ }; /* @@ -490,6 +496,7 @@ enum rxrpc_call_flag { RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ + RXRPC_CALL_TX_ALL_ACKED, /* Last packet has been hard-acked */ RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */ @@ -498,16 +505,16 @@ enum rxrpc_call_flag { RXRPC_CALL_DISCONNECTED, /* The call has been disconnected */ RXRPC_CALL_KERNEL, /* The call was made by the kernel */ RXRPC_CALL_UPGRADE, /* Service upgrade was requested for the call */ + RXRPC_CALL_DELAY_ACK_PENDING, /* DELAY ACK generation is pending */ + RXRPC_CALL_IDLE_ACK_PENDING, /* IDLE ACK generation is pending */ }; /* * Events that can be raised on a call. */ enum rxrpc_call_event { - RXRPC_CALL_EV_ACK, /* need to generate ACK */ RXRPC_CALL_EV_ABORT, /* need to generate abort */ RXRPC_CALL_EV_RESEND, /* Tx resend required */ - RXRPC_CALL_EV_PING, /* Ping send required */ RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ }; @@ -566,7 +573,7 @@ struct rxrpc_call { struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ const struct rxrpc_security *security; /* applied security module */ struct mutex user_mutex; /* User access mutex */ - unsigned long ack_at; /* When deferred ACK needs to happen */ + unsigned long delay_ack_at; /* When DELAY ACK needs to happen */ unsigned long ack_lost_at; /* When ACK is figured as lost */ unsigned long resend_at; /* When next resend needs to happen */ unsigned long ping_at; /* When next to send a ping */ @@ -576,7 +583,6 @@ struct rxrpc_call { unsigned long expect_term_by; /* When we expect call termination by */ u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ - struct skcipher_request *cipher_req; /* Packet cipher request buffer */ struct timer_list timer; /* Combined event timer */ struct work_struct processor; /* Event processor */ rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ @@ -587,14 +593,12 @@ struct rxrpc_call { struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ struct list_head sock_link; /* Link in rx->sock_calls */ struct rb_node sock_node; /* Node in rx->calls */ - struct sk_buff *tx_pending; /* Tx socket buffer being filled */ + struct rxrpc_txbuf *tx_pending; /* Tx buffer being filled */ wait_queue_head_t waitq; /* Wait queue for channel or Tx */ s64 tx_total_len; /* Total length left to be transmitted (or -1) */ - __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ unsigned long user_call_ID; /* user-defined call ID */ unsigned long flags; unsigned long events; - spinlock_t lock; spinlock_t notify_lock; /* Kernel notification lock */ rwlock_t state_lock; /* lock for state transition */ u32 abort_code; /* Local/remote abort code */ @@ -610,37 +614,27 @@ struct rxrpc_call { int debug_id; /* debug ID for printks */ unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ unsigned short rx_pkt_len; /* Current recvmsg packet len */ - bool rx_pkt_last; /* Current recvmsg packet is last */ - - /* Rx/Tx circular buffer, depending on phase. - * - * In the Rx phase, packets are annotated with 0 or the number of the - * segment of a jumbo packet each buffer refers to. There can be up to - * 47 segments in a maximum-size UDP packet. - * - * In the Tx phase, packets are annotated with which buffers have been - * acked. - */ -#define RXRPC_RXTX_BUFF_SIZE 64 -#define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) -#define RXRPC_INIT_RX_WINDOW_SIZE 63 - struct sk_buff **rxtx_buffer; - u8 *rxtx_annotations; -#define RXRPC_TX_ANNO_ACK 0 -#define RXRPC_TX_ANNO_UNACK 1 -#define RXRPC_TX_ANNO_NAK 2 -#define RXRPC_TX_ANNO_RETRANS 3 -#define RXRPC_TX_ANNO_MASK 0x03 -#define RXRPC_TX_ANNO_LAST 0x04 -#define RXRPC_TX_ANNO_RESENT 0x08 - -#define RXRPC_RX_ANNO_SUBPACKET 0x3f /* Subpacket number in jumbogram */ -#define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ - rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but - * not hard-ACK'd packet follows this. - */ + + /* Transmitted data tracking. */ + spinlock_t tx_lock; /* Transmit queue lock */ + struct list_head tx_buffer; /* Buffer of transmissible packets */ + rxrpc_seq_t tx_bottom; /* First packet in buffer */ + rxrpc_seq_t tx_transmitted; /* Highest packet transmitted */ rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ u16 tx_backoff; /* Delay to insert due to Tx failure */ + u8 tx_winsize; /* Maximum size of Tx window */ +#define RXRPC_TX_MAX_WINDOW 128 + ktime_t tx_last_sent; /* Last time a transmission occurred */ + + /* Received data tracking */ + struct sk_buff_head recvmsg_queue; /* Queue of packets ready for recvmsg() */ + struct sk_buff_head rx_oos_queue; /* Queue of out of sequence packets */ + + rxrpc_seq_t rx_highest_seq; /* Higest sequence number received */ + rxrpc_seq_t rx_consumed; /* Highest packet consumed */ + rxrpc_serial_t rx_serial; /* Highest serial received for this call */ + u8 rx_winsize; /* Size of Rx window */ + spinlock_t input_lock; /* Lock for packet input to this call */ /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS * is fixed, we keep these numbers in terms of segments (ie. DATA @@ -655,25 +649,17 @@ struct rxrpc_call { u8 cong_cumul_acks; /* Cumulative ACK count */ ktime_t cong_tstamp; /* Last time cwnd was changed */ - rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not - * consumed packet follows this. - */ - rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ - rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ - rxrpc_serial_t rx_serial; /* Highest serial received for this call */ - u8 rx_winsize; /* Size of Rx window */ - u8 tx_winsize; /* Maximum size of Tx window */ - bool tx_phase; /* T if transmission phase, F if receive phase */ - u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ - - spinlock_t input_lock; /* Lock for packet input to this call */ - /* Receive-phase ACK management (ACKs we send). */ u8 ackr_reason; /* reason to ACK */ rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ - rxrpc_seq_t ackr_highest_seq; /* Higest sequence number received */ + atomic64_t ackr_window; /* Base (in LSW) and top (in MSW) of SACK window */ atomic_t ackr_nr_unacked; /* Number of unacked packets */ atomic_t ackr_nr_consumed; /* Number of packets needing hard ACK */ + struct { +#define RXRPC_SACK_SIZE 256 + /* SACK table for soft-acked packets */ + u8 ackr_sack_table[RXRPC_SACK_SIZE]; + } __aligned(8); /* RTT management */ rxrpc_serial_t rtt_serial[4]; /* Serial number of DATA or PING sent */ @@ -687,21 +673,24 @@ struct rxrpc_call { ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ rxrpc_seq_t acks_first_seq; /* first sequence number received */ rxrpc_seq_t acks_prev_seq; /* Highest previousPacket received */ + rxrpc_seq_t acks_hard_ack; /* Latest hard-ack point */ rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ + rxrpc_serial_t acks_highest_serial; /* Highest serial number ACK'd */ + struct sk_buff *acks_soft_tbl; /* The last ACK packet with NAKs in it */ + spinlock_t acks_ack_lock; /* Access to ->acks_last_ack */ }; /* * Summary of a new ACK and the changes it made to the Tx buffer packet states. */ struct rxrpc_ack_summary { + u16 nr_acks; /* Number of ACKs in packet */ + u16 nr_new_acks; /* Number of new ACKs in packet */ + u16 nr_rot_new_acks; /* Number of rotated new ACKs */ u8 ack_reason; - u8 nr_acks; /* Number of ACKs in packet */ - u8 nr_nacks; /* Number of NACKs in packet */ - u8 nr_new_acks; /* Number of new ACKs in packet */ - u8 nr_new_nacks; /* Number of new NACKs in packet */ - u8 nr_rot_new_acks; /* Number of rotated new ACKs */ + bool saw_nacks; /* Saw NACKs in packet */ bool new_low_nack; /* T if new low NACK found */ bool retrans_timeo; /* T if reTx due to timeout happened */ u8 flight_size; /* Number of unreceived transmissions */ @@ -744,12 +733,58 @@ struct rxrpc_send_params { bool upgrade; /* If the connection is upgradeable */ }; +/* + * Buffer of data to be output as a packet. + */ +struct rxrpc_txbuf { + struct rcu_head rcu; + struct list_head call_link; /* Link in call->tx_queue */ + struct list_head tx_link; /* Link in live Enc queue or Tx queue */ + struct rxrpc_call *call; /* Call to which belongs */ + ktime_t last_sent; /* Time at which last transmitted */ + refcount_t ref; + rxrpc_seq_t seq; /* Sequence number of this packet */ + unsigned int call_debug_id; + unsigned int debug_id; + unsigned int len; /* Amount of data in buffer */ + unsigned int space; /* Remaining data space */ + unsigned int offset; /* Offset of fill point */ + unsigned long flags; +#define RXRPC_TXBUF_LAST 0 /* Set if last packet in Tx phase */ +#define RXRPC_TXBUF_RESENT 1 /* Set if has been resent */ + u8 /*enum rxrpc_propose_ack_trace*/ ack_why; /* If ack, why */ + struct { + /* The packet for encrypting and DMA'ing. We align it such + * that data[] aligns correctly for any crypto blocksize. + */ + u8 pad[64 - sizeof(struct rxrpc_wire_header)]; + struct rxrpc_wire_header wire; /* Network-ready header */ + union { + u8 data[RXRPC_JUMBO_DATALEN]; /* Data packet */ + struct { + struct rxrpc_ackpacket ack; + u8 acks[0]; + }; + }; + } __aligned(64); +}; + +static inline bool rxrpc_sending_to_server(const struct rxrpc_txbuf *txb) +{ + return txb->wire.flags & RXRPC_CLIENT_INITIATED; +} + +static inline bool rxrpc_sending_to_client(const struct rxrpc_txbuf *txb) +{ + return !rxrpc_sending_to_server(txb); +} + #include <trace/events/rxrpc.h> /* * af_rxrpc.c */ -extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; +extern atomic_t rxrpc_n_rx_skbs; extern struct workqueue_struct *rxrpc_workqueue; /* @@ -766,8 +801,12 @@ int rxrpc_user_charge_accept(struct rxrpc_sock *, unsigned long); /* * call_event.c */ -void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool, bool, - enum rxrpc_propose_ack_trace); +void rxrpc_propose_ping(struct rxrpc_call *call, u32 serial, + enum rxrpc_propose_ack_trace why); +void rxrpc_send_ACK(struct rxrpc_call *, u8, rxrpc_serial_t, enum rxrpc_propose_ack_trace); +void rxrpc_propose_delay_ACK(struct rxrpc_call *, rxrpc_serial_t, + enum rxrpc_propose_ack_trace); +void rxrpc_shrink_call_tx_buffer(struct rxrpc_call *); void rxrpc_process_call(struct work_struct *); void rxrpc_reduce_call_timer(struct rxrpc_call *call, @@ -949,15 +988,12 @@ static inline bool __rxrpc_use_local(struct rxrpc_local *local) * misc.c */ extern unsigned int rxrpc_max_backlog __read_mostly; -extern unsigned long rxrpc_requested_ack_delay; extern unsigned long rxrpc_soft_ack_delay; extern unsigned long rxrpc_idle_ack_delay; extern unsigned int rxrpc_rx_window_size; extern unsigned int rxrpc_rx_mtu; extern unsigned int rxrpc_rx_jumbo_max; -extern const s8 rxrpc_ack_priority[]; - /* * net_ns.c */ @@ -972,16 +1008,15 @@ static inline struct rxrpc_net *rxrpc_net(struct net *net) /* * output.c */ -int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *); +void rxrpc_transmit_ack_packets(struct rxrpc_local *); int rxrpc_send_abort_packet(struct rxrpc_call *); -int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); +int rxrpc_send_data_packet(struct rxrpc_call *, struct rxrpc_txbuf *); void rxrpc_reject_packets(struct rxrpc_local *); void rxrpc_send_keepalive(struct rxrpc_peer *); /* * peer_event.c */ -void rxrpc_encap_err_rcv(struct sock *sk, struct sk_buff *skb, unsigned int udp_offset); void rxrpc_error_report(struct sock *); void rxrpc_peer_keepalive_worker(struct work_struct *); @@ -1092,6 +1127,15 @@ void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); void rxrpc_purge_queue(struct sk_buff_head *); /* + * stats.c + */ +int rxrpc_stats_show(struct seq_file *seq, void *v); +int rxrpc_stats_clear(struct file *file, char *buf, size_t size); + +#define rxrpc_inc_stat(rxnet, s) atomic_inc(&(rxnet)->s) +#define rxrpc_dec_stat(rxnet, s) atomic_dec(&(rxnet)->s) + +/* * sysctl.c */ #ifdef CONFIG_SYSCTL @@ -1103,6 +1147,16 @@ static inline void rxrpc_sysctl_exit(void) {} #endif /* + * txbuf.c + */ +extern atomic_t rxrpc_nr_txbuf; +struct rxrpc_txbuf *rxrpc_alloc_txbuf(struct rxrpc_call *call, u8 packet_type, + gfp_t gfp); +void rxrpc_get_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what); +void rxrpc_see_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what); +void rxrpc_put_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what); + +/* * utils.c */ int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); |