| /* AF_RXRPC internal definitions |
| * |
| * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. |
| * Written by David Howells (dhowells@redhat.com) |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| */ |
| |
| #include <linux/atomic.h> |
| #include <linux/seqlock.h> |
| #include <net/sock.h> |
| #include <net/af_rxrpc.h> |
| #include <rxrpc/packet.h> |
| |
| #if 0 |
| #define CHECK_SLAB_OKAY(X) \ |
| BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \ |
| (POISON_FREE << 8 | POISON_FREE)) |
| #else |
| #define CHECK_SLAB_OKAY(X) do {} while (0) |
| #endif |
| |
| #define FCRYPT_BSIZE 8 |
| struct rxrpc_crypt { |
| union { |
| u8 x[FCRYPT_BSIZE]; |
| __be32 n[2]; |
| }; |
| } __attribute__((aligned(8))); |
| |
| #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) |
| #define rxrpc_queue_delayed_work(WS,D) \ |
| queue_delayed_work(rxrpc_workqueue, (WS), (D)) |
| |
| #define rxrpc_queue_call(CALL) rxrpc_queue_work(&(CALL)->processor) |
| |
| struct rxrpc_connection; |
| |
| /* |
| * Mark applied to socket buffers. |
| */ |
| enum rxrpc_skb_mark { |
| RXRPC_SKB_MARK_DATA, /* data message */ |
| RXRPC_SKB_MARK_FINAL_ACK, /* final ACK received message */ |
| RXRPC_SKB_MARK_BUSY, /* server busy message */ |
| RXRPC_SKB_MARK_REMOTE_ABORT, /* remote abort message */ |
| RXRPC_SKB_MARK_LOCAL_ABORT, /* local abort message */ |
| RXRPC_SKB_MARK_NET_ERROR, /* network error message */ |
| RXRPC_SKB_MARK_LOCAL_ERROR, /* local error message */ |
| RXRPC_SKB_MARK_NEW_CALL, /* local error message */ |
| }; |
| |
| /* |
| * sk_state for RxRPC sockets |
| */ |
| enum { |
| RXRPC_UNBOUND = 0, |
| RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ |
| RXRPC_CLIENT_BOUND, /* client local address bound */ |
| RXRPC_SERVER_BOUND, /* server local address bound */ |
| RXRPC_SERVER_LISTENING, /* server listening for connections */ |
| RXRPC_CLOSE, /* socket is being closed */ |
| }; |
| |
| /* |
| * RxRPC socket definition |
| */ |
| struct rxrpc_sock { |
| /* WARNING: sk has to be the first member */ |
| struct sock sk; |
| rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ |
| struct rxrpc_local *local; /* local endpoint */ |
| struct list_head listen_link; /* link in the local endpoint's listen list */ |
| struct list_head secureq; /* calls awaiting connection security clearance */ |
| struct list_head acceptq; /* calls awaiting acceptance */ |
| struct key *key; /* security for this socket */ |
| struct key *securities; /* list of server security descriptors */ |
| struct rb_root calls; /* outstanding calls on this socket */ |
| unsigned long flags; |
| #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ |
| rwlock_t call_lock; /* lock for calls */ |
| u32 min_sec_level; /* minimum security level */ |
| #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT |
| bool exclusive; /* Exclusive connection for a client socket */ |
| sa_family_t family; /* Protocol family created with */ |
| struct sockaddr_rxrpc srx; /* local address */ |
| struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ |
| }; |
| |
| #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) |
| |
| /* |
| * CPU-byteorder normalised Rx packet header. |
| */ |
| struct rxrpc_host_header { |
| u32 epoch; /* client boot timestamp */ |
| u32 cid; /* connection and channel ID */ |
| u32 callNumber; /* call ID (0 for connection-level packets) */ |
| u32 seq; /* sequence number of pkt in call stream */ |
| u32 serial; /* serial number of pkt sent to network */ |
| u8 type; /* packet type */ |
| u8 flags; /* packet flags */ |
| u8 userStatus; /* app-layer defined status */ |
| u8 securityIndex; /* security protocol ID */ |
| union { |
| u16 _rsvd; /* reserved */ |
| u16 cksum; /* kerberos security checksum */ |
| }; |
| u16 serviceId; /* service ID */ |
| } __packed; |
| |
| /* |
| * RxRPC socket buffer private variables |
| * - max 48 bytes (struct sk_buff::cb) |
| */ |
| struct rxrpc_skb_priv { |
| struct rxrpc_call *call; /* call with which associated */ |
| unsigned long resend_at; /* time in jiffies at which to resend */ |
| union { |
| unsigned int offset; /* offset into buffer of next read */ |
| int remain; /* amount of space remaining for next write */ |
| u32 error; /* network error code */ |
| bool need_resend; /* T if needs resending */ |
| }; |
| |
| struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ |
| }; |
| |
| #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) |
| |
| enum rxrpc_command { |
| RXRPC_CMD_SEND_DATA, /* send data message */ |
| RXRPC_CMD_SEND_ABORT, /* request abort generation */ |
| RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ |
| RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ |
| }; |
| |
| /* |
| * RxRPC security module interface |
| */ |
| struct rxrpc_security { |
| const char *name; /* name of this service */ |
| u8 security_index; /* security type provided */ |
| |
| /* Initialise a security service */ |
| int (*init)(void); |
| |
| /* Clean up a security service */ |
| void (*exit)(void); |
| |
| /* initialise a connection's security */ |
| int (*init_connection_security)(struct rxrpc_connection *); |
| |
| /* prime a connection's packet security */ |
| int (*prime_packet_security)(struct rxrpc_connection *); |
| |
| /* impose security on a packet */ |
| int (*secure_packet)(struct rxrpc_call *, |
| struct sk_buff *, |
| size_t, |
| void *); |
| |
| /* verify the security on a received packet */ |
| int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, u32 *); |
| |
| /* issue a challenge */ |
| int (*issue_challenge)(struct rxrpc_connection *); |
| |
| /* respond to a challenge */ |
| int (*respond_to_challenge)(struct rxrpc_connection *, |
| struct sk_buff *, |
| u32 *); |
| |
| /* verify a response */ |
| int (*verify_response)(struct rxrpc_connection *, |
| struct sk_buff *, |
| u32 *); |
| |
| /* clear connection security */ |
| void (*clear)(struct rxrpc_connection *); |
| }; |
| |
| /* |
| * RxRPC local transport endpoint description |
| * - owned by a single AF_RXRPC socket |
| * - pointed to by transport socket struct sk_user_data |
| */ |
| struct rxrpc_local { |
| struct rcu_head rcu; |
| atomic_t usage; |
| struct list_head link; |
| struct socket *socket; /* my UDP socket */ |
| struct work_struct processor; |
| struct list_head services; /* services listening on this endpoint */ |
| struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ |
| struct sk_buff_head accept_queue; /* incoming calls awaiting acceptance */ |
| struct sk_buff_head reject_queue; /* packets awaiting rejection */ |
| struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ |
| struct rb_root client_conns; /* Client connections by socket params */ |
| spinlock_t client_conns_lock; /* Lock for client_conns */ |
| spinlock_t lock; /* access lock */ |
| rwlock_t services_lock; /* lock for services list */ |
| int debug_id; /* debug ID for printks */ |
| bool dead; |
| struct sockaddr_rxrpc srx; /* local address */ |
| }; |
| |
| /* |
| * RxRPC remote transport endpoint definition |
| * - matched by local endpoint, remote port, address and protocol type |
| */ |
| struct rxrpc_peer { |
| struct rcu_head rcu; /* This must be first */ |
| atomic_t usage; |
| unsigned long hash_key; |
| struct hlist_node hash_link; |
| struct rxrpc_local *local; |
| struct hlist_head error_targets; /* targets for net error distribution */ |
| struct work_struct error_distributor; |
| struct rb_root service_conns; /* Service connections */ |
| seqlock_t service_conn_lock; |
| spinlock_t lock; /* access lock */ |
| unsigned int if_mtu; /* interface MTU for this peer */ |
| unsigned int mtu; /* network MTU for this peer */ |
| unsigned int maxdata; /* data size (MTU - hdrsize) */ |
| unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ |
| int debug_id; /* debug ID for printks */ |
| int error_report; /* Net (+0) or local (+1000000) to distribute */ |
| #define RXRPC_LOCAL_ERROR_OFFSET 1000000 |
| struct sockaddr_rxrpc srx; /* remote address */ |
| |
| /* calculated RTT cache */ |
| #define RXRPC_RTT_CACHE_SIZE 32 |
| suseconds_t rtt; /* current RTT estimate (in uS) */ |
| unsigned int rtt_point; /* next entry at which to insert */ |
| unsigned int rtt_usage; /* amount of cache actually used */ |
| suseconds_t rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */ |
| }; |
| |
| /* |
| * Keys for matching a connection. |
| */ |
| struct rxrpc_conn_proto { |
| union { |
| struct { |
| u32 epoch; /* epoch of this connection */ |
| u32 cid; /* connection ID */ |
| }; |
| u64 index_key; |
| }; |
| }; |
| |
| struct rxrpc_conn_parameters { |
| struct rxrpc_local *local; /* Representation of local endpoint */ |
| struct rxrpc_peer *peer; /* Remote endpoint */ |
| struct key *key; /* Security details */ |
| bool exclusive; /* T if conn is exclusive */ |
| u16 service_id; /* Service ID for this connection */ |
| u32 security_level; /* Security level selected */ |
| }; |
| |
| /* |
| * Bits in the connection flags. |
| */ |
| enum rxrpc_conn_flag { |
| RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ |
| RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ |
| RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ |
| RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */ |
| RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ |
| RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */ |
| }; |
| |
| /* |
| * Events that can be raised upon a connection. |
| */ |
| enum rxrpc_conn_event { |
| RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ |
| }; |
| |
| /* |
| * The connection cache state. |
| */ |
| enum rxrpc_conn_cache_state { |
| RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */ |
| RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */ |
| RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */ |
| RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */ |
| RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */ |
| }; |
| |
| /* |
| * The connection protocol state. |
| */ |
| enum rxrpc_conn_proto_state { |
| RXRPC_CONN_UNUSED, /* Connection not yet attempted */ |
| RXRPC_CONN_CLIENT, /* Client connection */ |
| RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ |
| RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ |
| RXRPC_CONN_SERVICE, /* Service secured connection */ |
| RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ |
| RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ |
| RXRPC_CONN__NR_STATES |
| }; |
| |
| /* |
| * RxRPC connection definition |
| * - matched by { local, peer, epoch, conn_id, direction } |
| * - each connection can only handle four simultaneous calls |
| */ |
| struct rxrpc_connection { |
| struct rxrpc_conn_proto proto; |
| struct rxrpc_conn_parameters params; |
| |
| atomic_t usage; |
| struct rcu_head rcu; |
| struct list_head cache_link; |
| |
| spinlock_t channel_lock; |
| unsigned char active_chans; /* Mask of active channels */ |
| #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1) |
| struct list_head waiting_calls; /* Calls waiting for channels */ |
| struct rxrpc_channel { |
| struct rxrpc_call __rcu *call; /* Active call */ |
| u32 call_id; /* ID of current call */ |
| u32 call_counter; /* Call ID counter */ |
| u32 last_call; /* ID of last call */ |
| u8 last_type; /* Type of last packet */ |
| u16 last_service_id; |
| union { |
| u32 last_seq; |
| u32 last_abort; |
| }; |
| } channels[RXRPC_MAXCALLS]; |
| |
| struct work_struct processor; /* connection event processor */ |
| union { |
| struct rb_node client_node; /* Node in local->client_conns */ |
| struct rb_node service_node; /* Node in peer->service_conns */ |
| }; |
| struct list_head proc_link; /* link in procfs list */ |
| struct list_head link; /* link in master connection list */ |
| struct sk_buff_head rx_queue; /* received conn-level packets */ |
| const struct rxrpc_security *security; /* applied security module */ |
| struct key *server_key; /* security for this service */ |
| struct crypto_skcipher *cipher; /* encryption handle */ |
| struct rxrpc_crypt csum_iv; /* packet checksum base */ |
| unsigned long flags; |
| unsigned long events; |
| unsigned long idle_timestamp; /* Time at which last became idle */ |
| spinlock_t state_lock; /* state-change lock */ |
| enum rxrpc_conn_cache_state cache_state : 8; |
| enum rxrpc_conn_proto_state state : 8; /* current state of connection */ |
| u32 local_abort; /* local abort code */ |
| u32 remote_abort; /* remote abort code */ |
| int debug_id; /* debug ID for printks */ |
| atomic_t serial; /* packet serial number counter */ |
| unsigned int hi_serial; /* highest serial number received */ |
| u8 size_align; /* data size alignment (for security) */ |
| u8 header_size; /* rxrpc + security header size */ |
| u8 security_size; /* security header size */ |
| u32 security_nonce; /* response re-use preventer */ |
| u8 security_ix; /* security type */ |
| u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ |
| }; |
| |
| /* |
| * Flags in call->flags. |
| */ |
| enum rxrpc_call_flag { |
| RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ |
| RXRPC_CALL_TERMINAL_MSG, /* call has given the socket its final message */ |
| RXRPC_CALL_RCVD_LAST, /* all packets received */ |
| RXRPC_CALL_RUN_RTIMER, /* Tx resend timer started */ |
| RXRPC_CALL_TX_SOFT_ACK, /* sent some soft ACKs */ |
| RXRPC_CALL_INIT_ACCEPT, /* acceptance was initiated */ |
| RXRPC_CALL_HAS_USERID, /* has a user ID attached */ |
| RXRPC_CALL_EXPECT_OOS, /* expect out of sequence packets */ |
| RXRPC_CALL_IS_SERVICE, /* Call is service call */ |
| RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ |
| RXRPC_CALL_RX_NO_MORE, /* Don't indicate MSG_MORE from recvmsg() */ |
| }; |
| |
| /* |
| * Events that can be raised on a call. |
| */ |
| enum rxrpc_call_event { |
| RXRPC_CALL_EV_RCVD_ACKALL, /* ACKALL or reply received */ |
| RXRPC_CALL_EV_RCVD_BUSY, /* busy packet received */ |
| RXRPC_CALL_EV_RCVD_ABORT, /* abort packet received */ |
| RXRPC_CALL_EV_RCVD_ERROR, /* network error received */ |
| RXRPC_CALL_EV_ACK_FINAL, /* need to generate final ACK (and release call) */ |
| RXRPC_CALL_EV_ACK, /* need to generate ACK */ |
| RXRPC_CALL_EV_REJECT_BUSY, /* need to generate busy message */ |
| RXRPC_CALL_EV_ABORT, /* need to generate abort */ |
| RXRPC_CALL_EV_CONN_ABORT, /* local connection abort generated */ |
| RXRPC_CALL_EV_RESEND_TIMER, /* Tx resend timer expired */ |
| RXRPC_CALL_EV_RESEND, /* Tx resend required */ |
| RXRPC_CALL_EV_DRAIN_RX_OOS, /* drain the Rx out of sequence queue */ |
| RXRPC_CALL_EV_LIFE_TIMER, /* call's lifetimer ran out */ |
| RXRPC_CALL_EV_ACCEPTED, /* incoming call accepted by userspace app */ |
| RXRPC_CALL_EV_SECURED, /* incoming call's connection is now secure */ |
| RXRPC_CALL_EV_POST_ACCEPT, /* need to post an "accept?" message to the app */ |
| RXRPC_CALL_EV_RELEASE, /* need to release the call's resources */ |
| }; |
| |
| /* |
| * The states that a call can be in. |
| */ |
| enum rxrpc_call_state { |
| RXRPC_CALL_UNINITIALISED, |
| RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ |
| RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ |
| RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ |
| RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ |
| RXRPC_CALL_CLIENT_FINAL_ACK, /* - client sending final ACK phase */ |
| RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ |
| RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ |
| RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ |
| RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ |
| RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ |
| RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ |
| RXRPC_CALL_COMPLETE, /* - call complete */ |
| RXRPC_CALL_DEAD, /* - call is dead */ |
| NR__RXRPC_CALL_STATES |
| }; |
| |
| /* |
| * Call completion condition (state == RXRPC_CALL_COMPLETE). |
| */ |
| enum rxrpc_call_completion { |
| RXRPC_CALL_SUCCEEDED, /* - Normal termination */ |
| RXRPC_CALL_SERVER_BUSY, /* - call rejected by busy server */ |
| RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ |
| RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ |
| RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */ |
| RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ |
| NR__RXRPC_CALL_COMPLETIONS |
| }; |
| |
| /* |
| * RxRPC call definition |
| * - matched by { connection, call_id } |
| */ |
| struct rxrpc_call { |
| struct rcu_head rcu; |
| struct rxrpc_connection *conn; /* connection carrying call */ |
| struct rxrpc_peer *peer; /* Peer record for remote address */ |
| struct rxrpc_sock *socket; /* socket responsible */ |
| struct timer_list lifetimer; /* lifetime remaining on call */ |
| struct timer_list deadspan; /* reap timer for re-ACK'ing, etc */ |
| struct timer_list ack_timer; /* ACK generation timer */ |
| struct timer_list resend_timer; /* Tx resend timer */ |
| struct work_struct destroyer; /* call destroyer */ |
| struct work_struct processor; /* packet processor and ACK generator */ |
| rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ |
| struct list_head link; /* link in master call list */ |
| struct list_head chan_wait_link; /* Link in conn->waiting_calls */ |
| struct hlist_node error_link; /* link in error distribution list */ |
| struct list_head accept_link; /* calls awaiting acceptance */ |
| struct rb_node sock_node; /* node in socket call tree */ |
| struct sk_buff_head rx_queue; /* received packets */ |
| struct sk_buff_head rx_oos_queue; /* packets received out of sequence */ |
| struct sk_buff_head knlrecv_queue; /* Queue for kernel_recv [TODO: replace this] */ |
| struct sk_buff *tx_pending; /* Tx socket buffer being filled */ |
| wait_queue_head_t waitq; /* Wait queue for channel or Tx */ |
| __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ |
| unsigned long user_call_ID; /* user-defined call ID */ |
| unsigned long creation_jif; /* time of call creation */ |
| unsigned long flags; |
| unsigned long events; |
| spinlock_t lock; |
| rwlock_t state_lock; /* lock for state transition */ |
| u32 abort_code; /* Local/remote abort code */ |
| int error; /* Local error incurred */ |
| enum rxrpc_call_state state : 8; /* current state of call */ |
| enum rxrpc_call_completion completion : 8; /* Call completion condition */ |
| atomic_t usage; |
| atomic_t skb_count; /* Outstanding packets on this call */ |
| atomic_t sequence; /* Tx data packet sequence counter */ |
| u16 service_id; /* service ID */ |
| u32 call_id; /* call ID on connection */ |
| u32 cid; /* connection ID plus channel index */ |
| int debug_id; /* debug ID for printks */ |
| |
| /* transmission-phase ACK management */ |
| u8 acks_head; /* offset into window of first entry */ |
| u8 acks_tail; /* offset into window of last entry */ |
| u8 acks_winsz; /* size of un-ACK'd window */ |
| u8 acks_unacked; /* lowest unacked packet in last ACK received */ |
| int acks_latest; /* serial number of latest ACK received */ |
| rxrpc_seq_t acks_hard; /* highest definitively ACK'd msg seq */ |
| unsigned long *acks_window; /* sent packet window |
| * - elements are pointers with LSB set if ACK'd |
| */ |
| |
| /* receive-phase ACK management */ |
| rxrpc_seq_t rx_data_expect; /* next data seq ID expected to be received */ |
| rxrpc_seq_t rx_data_post; /* next data seq ID expected to be posted */ |
| rxrpc_seq_t rx_data_recv; /* last data seq ID encountered by recvmsg */ |
| rxrpc_seq_t rx_data_eaten; /* last data seq ID consumed by recvmsg */ |
| rxrpc_seq_t rx_first_oos; /* first packet in rx_oos_queue (or 0) */ |
| rxrpc_seq_t ackr_win_top; /* top of ACK window (rx_data_eaten is bottom) */ |
| rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ |
| u8 ackr_reason; /* reason to ACK */ |
| u16 ackr_skew; /* skew on packet being ACK'd */ |
| rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ |
| atomic_t ackr_not_idle; /* number of packets in Rx queue */ |
| |
| /* received packet records, 1 bit per record */ |
| #define RXRPC_ACKR_WINDOW_ASZ DIV_ROUND_UP(RXRPC_MAXACKS, BITS_PER_LONG) |
| unsigned long ackr_window[RXRPC_ACKR_WINDOW_ASZ + 1]; |
| }; |
| |
| #include <trace/events/rxrpc.h> |
| |
| /* |
| * af_rxrpc.c |
| */ |
| extern atomic_t rxrpc_n_skbs; |
| extern u32 rxrpc_epoch; |
| extern atomic_t rxrpc_debug_id; |
| extern struct workqueue_struct *rxrpc_workqueue; |
| |
| /* |
| * call_accept.c |
| */ |
| void rxrpc_accept_incoming_calls(struct rxrpc_local *); |
| struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, |
| rxrpc_notify_rx_t); |
| int rxrpc_reject_call(struct rxrpc_sock *); |
| |
| /* |
| * call_event.c |
| */ |
| void __rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool); |
| void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool); |
| void rxrpc_process_call(struct work_struct *); |
| |
| /* |
| * call_object.c |
| */ |
| extern const char *const rxrpc_call_states[]; |
| extern const char *const rxrpc_call_completions[]; |
| extern unsigned int rxrpc_max_call_lifetime; |
| extern unsigned int rxrpc_dead_call_expiry; |
| extern struct kmem_cache *rxrpc_call_jar; |
| extern struct list_head rxrpc_calls; |
| extern rwlock_t rxrpc_call_lock; |
| |
| struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); |
| struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, |
| struct rxrpc_conn_parameters *, |
| struct sockaddr_rxrpc *, |
| unsigned long, gfp_t); |
| struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *, |
| struct rxrpc_connection *, |
| struct sk_buff *); |
| void rxrpc_release_call(struct rxrpc_call *); |
| void rxrpc_release_calls_on_socket(struct rxrpc_sock *); |
| void rxrpc_see_call(struct rxrpc_call *); |
| void rxrpc_get_call(struct rxrpc_call *); |
| void rxrpc_put_call(struct rxrpc_call *); |
| void rxrpc_get_call_for_skb(struct rxrpc_call *, struct sk_buff *); |
| void rxrpc_put_call_for_skb(struct rxrpc_call *, struct sk_buff *); |
| void __exit rxrpc_destroy_all_calls(void); |
| |
| static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) |
| { |
| return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); |
| } |
| |
| static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) |
| { |
| return !rxrpc_is_service_call(call); |
| } |
| |
| /* |
| * Transition a call to the complete state. |
| */ |
| static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call, |
| enum rxrpc_call_completion compl, |
| u32 abort_code, |
| int error) |
| { |
| if (call->state < RXRPC_CALL_COMPLETE) { |
| call->abort_code = abort_code; |
| call->error = error; |
| call->completion = compl, |
| call->state = RXRPC_CALL_COMPLETE; |
| return true; |
| } |
| return false; |
| } |
| |
| static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, |
| enum rxrpc_call_completion compl, |
| u32 abort_code, |
| int error) |
| { |
| int ret; |
| |
| write_lock_bh(&call->state_lock); |
| ret = __rxrpc_set_call_completion(call, compl, abort_code, error); |
| write_unlock_bh(&call->state_lock); |
| return ret; |
| } |
| |
| /* |
| * Record that a call successfully completed. |
| */ |
| static inline void __rxrpc_call_completed(struct rxrpc_call *call) |
| { |
| __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); |
| } |
| |
| static inline void rxrpc_call_completed(struct rxrpc_call *call) |
| { |
| write_lock_bh(&call->state_lock); |
| __rxrpc_call_completed(call); |
| write_unlock_bh(&call->state_lock); |
| } |
| |
| /* |
| * Record that a call is locally aborted. |
| */ |
| static inline bool __rxrpc_abort_call(struct rxrpc_call *call, |
| u32 abort_code, int error) |
| { |
| if (__rxrpc_set_call_completion(call, |
| RXRPC_CALL_LOCALLY_ABORTED, |
| abort_code, error)) { |
| set_bit(RXRPC_CALL_EV_ABORT, &call->events); |
| return true; |
| } |
| return false; |
| } |
| |
| static inline bool rxrpc_abort_call(struct rxrpc_call *call, |
| u32 abort_code, int error) |
| { |
| bool ret; |
| |
| write_lock_bh(&call->state_lock); |
| ret = __rxrpc_abort_call(call, abort_code, error); |
| write_unlock_bh(&call->state_lock); |
| return ret; |
| } |
| |
| /* |
| * conn_client.c |
| */ |
| extern unsigned int rxrpc_max_client_connections; |
| extern unsigned int rxrpc_reap_client_connections; |
| extern unsigned int rxrpc_conn_idle_client_expiry; |
| extern unsigned int rxrpc_conn_idle_client_fast_expiry; |
| extern struct idr rxrpc_client_conn_ids; |
| |
| void rxrpc_destroy_client_conn_ids(void); |
| int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *, |
| struct sockaddr_rxrpc *, gfp_t); |
| void rxrpc_expose_client_call(struct rxrpc_call *); |
| void rxrpc_disconnect_client_call(struct rxrpc_call *); |
| void rxrpc_put_client_conn(struct rxrpc_connection *); |
| void __exit rxrpc_destroy_all_client_connections(void); |
| |
| /* |
| * conn_event.c |
| */ |
| void rxrpc_process_connection(struct work_struct *); |
| void rxrpc_reject_packet(struct rxrpc_local *, struct sk_buff *); |
| void rxrpc_reject_packets(struct rxrpc_local *); |
| |
| /* |
| * conn_object.c |
| */ |
| extern unsigned int rxrpc_connection_expiry; |
| extern struct list_head rxrpc_connections; |
| extern struct list_head rxrpc_connection_proc_list; |
| extern rwlock_t rxrpc_connection_lock; |
| |
| int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); |
| struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); |
| struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, |
| struct sk_buff *); |
| void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); |
| void rxrpc_disconnect_call(struct rxrpc_call *); |
| void rxrpc_kill_connection(struct rxrpc_connection *); |
| void __rxrpc_put_connection(struct rxrpc_connection *); |
| void __exit rxrpc_destroy_all_connections(void); |
| |
| static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) |
| { |
| return conn->out_clientflag; |
| } |
| |
| static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) |
| { |
| return !rxrpc_conn_is_client(conn); |
| } |
| |
| static inline void rxrpc_get_connection(struct rxrpc_connection *conn) |
| { |
| atomic_inc(&conn->usage); |
| } |
| |
| static inline |
| struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *conn) |
| { |
| return atomic_inc_not_zero(&conn->usage) ? conn : NULL; |
| } |
| |
| static inline void rxrpc_put_connection(struct rxrpc_connection *conn) |
| { |
| if (!conn) |
| return; |
| |
| if (rxrpc_conn_is_client(conn)) { |
| if (atomic_dec_and_test(&conn->usage)) |
| rxrpc_put_client_conn(conn); |
| } else { |
| if (atomic_dec_return(&conn->usage) == 1) |
| __rxrpc_put_connection(conn); |
| } |
| } |
| |
| |
| static inline bool rxrpc_queue_conn(struct rxrpc_connection *conn) |
| { |
| if (!rxrpc_get_connection_maybe(conn)) |
| return false; |
| if (!rxrpc_queue_work(&conn->processor)) |
| rxrpc_put_connection(conn); |
| return true; |
| } |
| |
| /* |
| * conn_service.c |
| */ |
| struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, |
| struct sk_buff *); |
| struct rxrpc_connection *rxrpc_incoming_connection(struct rxrpc_local *, |
| struct sockaddr_rxrpc *, |
| struct sk_buff *); |
| void rxrpc_unpublish_service_conn(struct rxrpc_connection *); |
| |
| /* |
| * input.c |
| */ |
| void rxrpc_data_ready(struct sock *); |
| int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool, bool); |
| void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *); |
| |
| /* |
| * insecure.c |
| */ |
| extern const struct rxrpc_security rxrpc_no_security; |
| |
| /* |
| * key.c |
| */ |
| extern struct key_type key_type_rxrpc; |
| extern struct key_type key_type_rxrpc_s; |
| |
| int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); |
| int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); |
| int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t, |
| u32); |
| |
| /* |
| * local_event.c |
| */ |
| extern void rxrpc_process_local_events(struct rxrpc_local *); |
| |
| /* |
| * local_object.c |
| */ |
| struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *); |
| void __rxrpc_put_local(struct rxrpc_local *); |
| void __exit rxrpc_destroy_all_locals(void); |
| |
| static inline void rxrpc_get_local(struct rxrpc_local *local) |
| { |
| atomic_inc(&local->usage); |
| } |
| |
| static inline |
| struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local) |
| { |
| return atomic_inc_not_zero(&local->usage) ? local : NULL; |
| } |
| |
| static inline void rxrpc_put_local(struct rxrpc_local *local) |
| { |
| if (local && atomic_dec_and_test(&local->usage)) |
| __rxrpc_put_local(local); |
| } |
| |
| static inline void rxrpc_queue_local(struct rxrpc_local *local) |
| { |
| rxrpc_queue_work(&local->processor); |
| } |
| |
| /* |
| * misc.c |
| */ |
| extern unsigned int rxrpc_max_backlog __read_mostly; |
| extern unsigned int rxrpc_requested_ack_delay; |
| extern unsigned int rxrpc_soft_ack_delay; |
| extern unsigned int 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 unsigned int rxrpc_resend_timeout; |
| |
| extern const char *const rxrpc_pkts[]; |
| extern const s8 rxrpc_ack_priority[]; |
| |
| extern const char *rxrpc_acks(u8 reason); |
| |
| /* |
| * output.c |
| */ |
| int rxrpc_send_data_packet(struct rxrpc_connection *, struct sk_buff *); |
| |
| /* |
| * peer_event.c |
| */ |
| void rxrpc_error_report(struct sock *); |
| void rxrpc_peer_error_distributor(struct work_struct *); |
| |
| /* |
| * peer_object.c |
| */ |
| struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, |
| const struct sockaddr_rxrpc *); |
| struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *, |
| struct sockaddr_rxrpc *, gfp_t); |
| struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); |
| |
| static inline struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *peer) |
| { |
| atomic_inc(&peer->usage); |
| return peer; |
| } |
| |
| static inline |
| struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer) |
| { |
| return atomic_inc_not_zero(&peer->usage) ? peer : NULL; |
| } |
| |
| extern void __rxrpc_put_peer(struct rxrpc_peer *peer); |
| static inline void rxrpc_put_peer(struct rxrpc_peer *peer) |
| { |
| if (peer && atomic_dec_and_test(&peer->usage)) |
| __rxrpc_put_peer(peer); |
| } |
| |
| /* |
| * proc.c |
| */ |
| extern const struct file_operations rxrpc_call_seq_fops; |
| extern const struct file_operations rxrpc_connection_seq_fops; |
| |
| /* |
| * recvmsg.c |
| */ |
| void rxrpc_remove_user_ID(struct rxrpc_sock *, struct rxrpc_call *); |
| int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); |
| |
| /* |
| * rxkad.c |
| */ |
| #ifdef CONFIG_RXKAD |
| extern const struct rxrpc_security rxkad; |
| #endif |
| |
| /* |
| * security.c |
| */ |
| int __init rxrpc_init_security(void); |
| void rxrpc_exit_security(void); |
| int rxrpc_init_client_conn_security(struct rxrpc_connection *); |
| int rxrpc_init_server_conn_security(struct rxrpc_connection *); |
| |
| /* |
| * sendmsg.c |
| */ |
| int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); |
| |
| /* |
| * skbuff.c |
| */ |
| void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); |
| void rxrpc_packet_destructor(struct sk_buff *); |
| void rxrpc_new_skb(struct sk_buff *); |
| void rxrpc_see_skb(struct sk_buff *); |
| void rxrpc_get_skb(struct sk_buff *); |
| void rxrpc_free_skb(struct sk_buff *); |
| void rxrpc_purge_queue(struct sk_buff_head *); |
| |
| /* |
| * sysctl.c |
| */ |
| #ifdef CONFIG_SYSCTL |
| extern int __init rxrpc_sysctl_init(void); |
| extern void rxrpc_sysctl_exit(void); |
| #else |
| static inline int __init rxrpc_sysctl_init(void) { return 0; } |
| static inline void rxrpc_sysctl_exit(void) {} |
| #endif |
| |
| /* |
| * utils.c |
| */ |
| int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); |
| |
| /* |
| * debug tracing |
| */ |
| extern unsigned int rxrpc_debug; |
| |
| #define dbgprintk(FMT,...) \ |
| printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) |
| |
| #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
| #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) |
| #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) |
| #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) |
| #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) |
| |
| |
| #if defined(__KDEBUG) |
| #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) |
| #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) |
| #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) |
| #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) |
| #define _net(FMT,...) knet(FMT,##__VA_ARGS__) |
| |
| #elif defined(CONFIG_AF_RXRPC_DEBUG) |
| #define RXRPC_DEBUG_KENTER 0x01 |
| #define RXRPC_DEBUG_KLEAVE 0x02 |
| #define RXRPC_DEBUG_KDEBUG 0x04 |
| #define RXRPC_DEBUG_KPROTO 0x08 |
| #define RXRPC_DEBUG_KNET 0x10 |
| |
| #define _enter(FMT,...) \ |
| do { \ |
| if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ |
| kenter(FMT,##__VA_ARGS__); \ |
| } while (0) |
| |
| #define _leave(FMT,...) \ |
| do { \ |
| if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ |
| kleave(FMT,##__VA_ARGS__); \ |
| } while (0) |
| |
| #define _debug(FMT,...) \ |
| do { \ |
| if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ |
| kdebug(FMT,##__VA_ARGS__); \ |
| } while (0) |
| |
| #define _proto(FMT,...) \ |
| do { \ |
| if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ |
| kproto(FMT,##__VA_ARGS__); \ |
| } while (0) |
| |
| #define _net(FMT,...) \ |
| do { \ |
| if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ |
| knet(FMT,##__VA_ARGS__); \ |
| } while (0) |
| |
| #else |
| #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
| #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) |
| #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) |
| #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) |
| #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) |
| #endif |
| |
| /* |
| * debug assertion checking |
| */ |
| #if 1 // defined(__KDEBUGALL) |
| |
| #define ASSERT(X) \ |
| do { \ |
| if (unlikely(!(X))) { \ |
| pr_err("Assertion failed\n"); \ |
| BUG(); \ |
| } \ |
| } while (0) |
| |
| #define ASSERTCMP(X, OP, Y) \ |
| do { \ |
| unsigned long _x = (unsigned long)(X); \ |
| unsigned long _y = (unsigned long)(Y); \ |
| if (unlikely(!(_x OP _y))) { \ |
| pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ |
| _x, _x, #OP, _y, _y); \ |
| BUG(); \ |
| } \ |
| } while (0) |
| |
| #define ASSERTIF(C, X) \ |
| do { \ |
| if (unlikely((C) && !(X))) { \ |
| pr_err("Assertion failed\n"); \ |
| BUG(); \ |
| } \ |
| } while (0) |
| |
| #define ASSERTIFCMP(C, X, OP, Y) \ |
| do { \ |
| unsigned long _x = (unsigned long)(X); \ |
| unsigned long _y = (unsigned long)(Y); \ |
| if (unlikely((C) && !(_x OP _y))) { \ |
| pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ |
| _x, _x, #OP, _y, _y); \ |
| BUG(); \ |
| } \ |
| } while (0) |
| |
| #else |
| |
| #define ASSERT(X) \ |
| do { \ |
| } while (0) |
| |
| #define ASSERTCMP(X, OP, Y) \ |
| do { \ |
| } while (0) |
| |
| #define ASSERTIF(C, X) \ |
| do { \ |
| } while (0) |
| |
| #define ASSERTIFCMP(C, X, OP, Y) \ |
| do { \ |
| } while (0) |
| |
| #endif /* __KDEBUGALL */ |