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- /* 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/net_namespace.h>
- #include <net/netns/generic.h>
- #include <net/sock.h>
- #include <net/af_rxrpc.h>
- #include "protocol.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))
- struct rxrpc_connection;
- /*
- * Mark applied to socket buffers in skb->mark. skb->priority is used
- * to pass supplementary information.
- */
- enum rxrpc_skb_mark {
- RXRPC_SKB_MARK_REJECT_BUSY, /* Reject with BUSY */
- RXRPC_SKB_MARK_REJECT_ABORT, /* Reject with ABORT (code in skb->priority) */
- };
- /*
- * 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_BOUND2, /* second server local address bound */
- RXRPC_SERVER_LISTENING, /* server listening for connections */
- RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */
- RXRPC_CLOSE, /* socket is being closed */
- };
- /*
- * Per-network namespace data.
- */
- struct rxrpc_net {
- struct proc_dir_entry *proc_net; /* Subdir in /proc/net */
- u32 epoch; /* Local epoch for detecting local-end reset */
- struct list_head calls; /* List of calls active in this namespace */
- rwlock_t call_lock; /* Lock for ->calls */
- atomic_t nr_calls; /* Count of allocated calls */
- atomic_t nr_conns;
- struct list_head conn_proc_list; /* List of conns in this namespace for proc */
- struct list_head service_conns; /* Service conns in this namespace */
- rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */
- struct work_struct service_conn_reaper;
- struct timer_list service_conn_reap_timer;
- unsigned int nr_client_conns;
- unsigned int nr_active_client_conns;
- bool kill_all_client_conns;
- bool live;
- spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */
- spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */
- struct list_head waiting_client_conns;
- struct list_head active_client_conns;
- struct list_head idle_client_conns;
- struct work_struct client_conn_reaper;
- struct timer_list client_conn_reap_timer;
- struct list_head local_endpoints;
- struct mutex local_mutex; /* Lock for ->local_endpoints */
- DECLARE_HASHTABLE (peer_hash, 10);
- spinlock_t peer_hash_lock; /* Lock for ->peer_hash */
- #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */
- u8 peer_keepalive_cursor;
- time64_t peer_keepalive_base;
- struct list_head peer_keepalive[32];
- struct list_head peer_keepalive_new;
- struct timer_list peer_keepalive_timer;
- struct work_struct peer_keepalive_work;
- };
- /*
- * Service backlog preallocation.
- *
- * This contains circular buffers of preallocated peers, connections and calls
- * for incoming service calls and their head and tail pointers. This allows
- * calls to be set up in the data_ready handler, thereby avoiding the need to
- * shuffle packets around so much.
- */
- struct rxrpc_backlog {
- unsigned short peer_backlog_head;
- unsigned short peer_backlog_tail;
- unsigned short conn_backlog_head;
- unsigned short conn_backlog_tail;
- unsigned short call_backlog_head;
- unsigned short call_backlog_tail;
- #define RXRPC_BACKLOG_MAX 32
- struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX];
- struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX];
- struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX];
- };
- /*
- * 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 */
- rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */
- struct rxrpc_local *local; /* local endpoint */
- struct rxrpc_backlog *backlog; /* Preallocation for services */
- spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */
- struct list_head sock_calls; /* List of calls owned by this socket */
- struct list_head to_be_accepted; /* calls awaiting acceptance */
- struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */
- rwlock_t recvmsg_lock; /* Lock for recvmsg_q */
- struct key *key; /* security for this socket */
- struct key *securities; /* list of server security descriptors */
- struct rb_root calls; /* User ID -> call mapping */
- 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 */
- u16 second_service; /* Additional service bound to the endpoint */
- struct {
- /* Service upgrade information */
- u16 from; /* Service ID to upgrade (if not 0) */
- u16 to; /* service ID to upgrade to */
- } service_upgrade;
- sa_family_t family; /* Protocol family created with */
- struct sockaddr_rxrpc srx; /* Primary Service/local addresses */
- 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 {
- union {
- u8 nr_jumbo; /* Number of jumbo subpackets */
- };
- union {
- int remain; /* amount of space remaining for next write */
- };
- struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */
- };
- #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
- /*
- * 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 *,
- unsigned int, unsigned int, rxrpc_seq_t, u16);
- /* 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 *);
- /* 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 active_users; /* Number of users of the local endpoint */
- atomic_t usage; /* Number of references to the structure */
- struct rxrpc_net *rxnet; /* The network ns in which this resides */
- struct list_head link;
- struct socket *socket; /* my UDP socket */
- struct work_struct processor;
- 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 */
- 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;
- bool service_closed; /* Service socket closed */
- 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 rb_root service_conns; /* Service connections */
- struct list_head keepalive_link; /* Link in net->peer_keepalive[] */
- time64_t last_tx_at; /* Last time packet sent here */
- 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 */
- struct sockaddr_rxrpc srx; /* remote address */
- /* calculated RTT cache */
- #define RXRPC_RTT_CACHE_SIZE 32
- spinlock_t rtt_input_lock; /* RTT lock for input routine */
- ktime_t rtt_last_req; /* Time of last RTT request */
- u64 rtt; /* Current RTT estimate (in nS) */
- u64 rtt_sum; /* Sum of cache contents */
- u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */
- u8 rtt_cursor; /* next entry at which to insert */
- u8 rtt_usage; /* amount of cache actually used */
- u8 cong_cwnd; /* Congestion window size */
- };
- /*
- * 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 */
- bool upgrade; /* T if service ID can be upgraded */
- 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 */
- RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */
- RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */
- RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */
- RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */
- RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */
- };
- #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \
- (1UL << RXRPC_CONN_FINAL_ACK_1) | \
- (1UL << RXRPC_CONN_FINAL_ACK_2) | \
- (1UL << RXRPC_CONN_FINAL_ACK_3))
- /*
- * 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_UPGRADE, /* Conn is on active list, probing for upgrade */
- RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */
- RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */
- RXRPC_CONN__NR_CACHE_STATES
- };
- /*
- * The connection protocol state.
- */
- enum rxrpc_conn_proto_state {
- RXRPC_CONN_UNUSED, /* Connection not yet attempted */
- RXRPC_CONN_CLIENT, /* Client connection */
- RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */
- 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 {
- unsigned long final_ack_at; /* Time at which to issue final ACK */
- struct rxrpc_call __rcu *call; /* Active call */
- unsigned int call_debug_id; /* call->debug_id */
- 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 */
- union {
- u32 last_seq;
- u32 last_abort;
- };
- } channels[RXRPC_MAXCALLS];
- struct timer_list timer; /* Conn event timer */
- 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;
- enum rxrpc_conn_proto_state state; /* current state of connection */
- u32 abort_code; /* Abort code of connection abort */
- int debug_id; /* debug ID for printks */
- atomic_t serial; /* packet serial number counter */
- unsigned int hi_serial; /* highest serial number received */
- u32 security_nonce; /* response re-use preventer */
- u32 service_id; /* Service ID, possibly upgraded */
- u8 size_align; /* data size alignment (for security) */
- u8 security_size; /* security header size */
- u8 security_ix; /* security type */
- u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
- short error; /* Local error code */
- };
- static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp)
- {
- return sp->hdr.flags & RXRPC_CLIENT_INITIATED;
- }
- static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp)
- {
- return !rxrpc_to_server(sp);
- }
- /*
- * Flags in call->flags.
- */
- enum rxrpc_call_flag {
- RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */
- RXRPC_CALL_HAS_USERID, /* has a user ID attached */
- RXRPC_CALL_IS_SERVICE, /* Call is service call */
- 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_LASTQ, /* Last packet has been queued */
- RXRPC_CALL_SEND_PING, /* A ping will need to be sent */
- RXRPC_CALL_PINGING, /* Ping in process */
- RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */
- RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */
- RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */
- RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */
- RXRPC_CALL_DISCONNECTED, /* The call has been disconnected */
- };
- /*
- * 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 */
- };
- /*
- * 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_SERVER_PREALLOC, /* - service preallocation */
- 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 */
- NR__RXRPC_CALL_STATES
- };
- /*
- * Call Tx congestion management modes.
- */
- enum rxrpc_congest_mode {
- RXRPC_CALL_SLOW_START,
- RXRPC_CALL_CONGEST_AVOIDANCE,
- RXRPC_CALL_PACKET_LOSS,
- RXRPC_CALL_FAST_RETRANSMIT,
- NR__RXRPC_CONGEST_MODES
- };
- /*
- * 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 __rcu *socket; /* socket responsible */
- struct rxrpc_net *rxnet; /* Network namespace to which call belongs */
- struct mutex user_mutex; /* User access mutex */
- unsigned long ack_at; /* When deferred 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 */
- unsigned long keepalive_at; /* When next to send a keepalive ping */
- unsigned long expect_rx_by; /* When we expect to get a packet by */
- unsigned long expect_req_by; /* When we expect to get a request DATA packet by */
- 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 timer_list timer; /* Combined event timer */
- struct work_struct processor; /* Event processor */
- 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; /* Link in rx->acceptq */
- 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 */
- 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 */
- int error; /* Local error incurred */
- enum rxrpc_call_state state; /* current state of call */
- enum rxrpc_call_completion completion; /* Call completion condition */
- atomic_t usage;
- u16 service_id; /* service ID */
- u8 security_ix; /* Security type */
- u32 call_id; /* call ID on connection */
- u32 cid; /* connection ID plus channel index */
- 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 */
- /* 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_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */
- #define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */
- #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.
- */
- rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */
- u16 tx_backoff; /* Delay to insert due to Tx failure */
- /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS
- * is fixed, we keep these numbers in terms of segments (ie. DATA
- * packets) rather than bytes.
- */
- #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN
- u8 cong_cwnd; /* Congestion window size */
- u8 cong_extra; /* Extra to send for congestion management */
- u8 cong_ssthresh; /* Slow-start threshold */
- enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */
- u8 cong_dup_acks; /* Count of ACKs showing missing packets */
- 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 */
- 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 */
- rxrpc_serial_t ackr_first_seq; /* first sequence number received */
- rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */
- rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */
- rxrpc_seq_t ackr_seen; /* Highest packet shown seen */
- /* ping management */
- rxrpc_serial_t ping_serial; /* Last ping sent */
- ktime_t ping_time; /* Time last ping sent */
- /* transmission-phase ACK management */
- ktime_t acks_latest_ts; /* Timestamp of latest ACK received */
- rxrpc_serial_t acks_latest; /* serial number of latest ACK received */
- 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 */
- };
- /*
- * Summary of a new ACK and the changes it made to the Tx buffer packet states.
- */
- struct rxrpc_ack_summary {
- 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 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 */
- /* Place to stash values for tracing */
- enum rxrpc_congest_mode mode:8;
- u8 cwnd;
- u8 ssthresh;
- u8 dup_acks;
- u8 cumulative_acks;
- };
- /*
- * sendmsg() cmsg-specified parameters.
- */
- 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 */
- };
- struct rxrpc_call_params {
- s64 tx_total_len; /* Total Tx data length (if send data) */
- unsigned long user_call_ID; /* User's call ID */
- struct {
- u32 hard; /* Maximum lifetime (sec) */
- u32 idle; /* Max time since last data packet (msec) */
- u32 normal; /* Max time since last call packet (msec) */
- } timeouts;
- u8 nr_timeouts; /* Number of timeouts specified */
- };
- struct rxrpc_send_params {
- struct rxrpc_call_params call;
- u32 abort_code; /* Abort code to Tx (if abort) */
- enum rxrpc_command command : 8; /* The command to implement */
- bool exclusive; /* Shared or exclusive call */
- bool upgrade; /* If the connection is upgradeable */
- };
- #include <trace/events/rxrpc.h>
- /*
- * af_rxrpc.c
- */
- extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs;
- extern struct workqueue_struct *rxrpc_workqueue;
- /*
- * call_accept.c
- */
- int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t);
- void rxrpc_discard_prealloc(struct rxrpc_sock *);
- struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *,
- struct rxrpc_sock *,
- struct sk_buff *);
- 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, bool,
- enum rxrpc_propose_ack_trace);
- void rxrpc_process_call(struct work_struct *);
- static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call,
- unsigned long expire_at,
- unsigned long now,
- enum rxrpc_timer_trace why)
- {
- trace_rxrpc_timer(call, why, now);
- timer_reduce(&call->timer, expire_at);
- }
- /*
- * 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 struct kmem_cache *rxrpc_call_jar;
- struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long);
- struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int);
- struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
- struct rxrpc_conn_parameters *,
- struct sockaddr_rxrpc *,
- struct rxrpc_call_params *, gfp_t,
- unsigned int);
- int rxrpc_retry_client_call(struct rxrpc_sock *,
- struct rxrpc_call *,
- struct rxrpc_conn_parameters *,
- struct sockaddr_rxrpc *,
- gfp_t);
- void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *,
- struct sk_buff *);
- void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *);
- int rxrpc_prepare_call_for_retry(struct rxrpc_sock *, struct rxrpc_call *);
- void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
- bool __rxrpc_queue_call(struct rxrpc_call *);
- bool rxrpc_queue_call(struct rxrpc_call *);
- void rxrpc_see_call(struct rxrpc_call *);
- void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
- void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace);
- void rxrpc_cleanup_call(struct rxrpc_call *);
- void rxrpc_destroy_all_calls(struct rxrpc_net *);
- 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;
- trace_rxrpc_call_complete(call);
- wake_up(&call->waitq);
- 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)
- {
- bool 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 bool __rxrpc_call_completed(struct rxrpc_call *call)
- {
- return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0);
- }
- static inline bool rxrpc_call_completed(struct rxrpc_call *call)
- {
- bool ret;
- write_lock_bh(&call->state_lock);
- ret = __rxrpc_call_completed(call);
- write_unlock_bh(&call->state_lock);
- return ret;
- }
- /*
- * Record that a call is locally aborted.
- */
- static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call,
- rxrpc_seq_t seq,
- u32 abort_code, int error)
- {
- trace_rxrpc_abort(call->debug_id, why, call->cid, call->call_id, seq,
- abort_code, error);
- return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED,
- abort_code, error);
- }
- static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call,
- rxrpc_seq_t seq, u32 abort_code, int error)
- {
- bool ret;
- write_lock_bh(&call->state_lock);
- ret = __rxrpc_abort_call(why, call, seq, abort_code, error);
- write_unlock_bh(&call->state_lock);
- return ret;
- }
- /*
- * Abort a call due to a protocol error.
- */
- static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call,
- struct sk_buff *skb,
- const char *eproto_why,
- const char *why,
- u32 abort_code)
- {
- struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
- trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why);
- return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO);
- }
- #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \
- __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \
- (abort_why), (abort_code))
- /*
- * conn_client.c
- */
- extern unsigned int rxrpc_max_client_connections;
- extern unsigned int rxrpc_reap_client_connections;
- extern unsigned long rxrpc_conn_idle_client_expiry;
- extern unsigned long 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_sock *, 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 rxrpc_discard_expired_client_conns(struct work_struct *);
- void rxrpc_destroy_all_client_connections(struct rxrpc_net *);
- void rxrpc_clean_up_local_conns(struct rxrpc_local *);
- /*
- * conn_event.c
- */
- void rxrpc_process_connection(struct work_struct *);
- /*
- * conn_object.c
- */
- extern unsigned int rxrpc_connection_expiry;
- extern unsigned int rxrpc_closed_conn_expiry;
- struct rxrpc_connection *rxrpc_alloc_connection(gfp_t);
- struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *,
- struct sk_buff *,
- struct rxrpc_peer **);
- void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *);
- void rxrpc_disconnect_call(struct rxrpc_call *);
- void rxrpc_kill_connection(struct rxrpc_connection *);
- bool rxrpc_queue_conn(struct rxrpc_connection *);
- void rxrpc_see_connection(struct rxrpc_connection *);
- void rxrpc_get_connection(struct rxrpc_connection *);
- struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *);
- void rxrpc_put_service_conn(struct rxrpc_connection *);
- void rxrpc_service_connection_reaper(struct work_struct *);
- void rxrpc_destroy_all_connections(struct rxrpc_net *);
- 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_put_connection(struct rxrpc_connection *conn)
- {
- if (!conn)
- return;
- if (rxrpc_conn_is_client(conn))
- rxrpc_put_client_conn(conn);
- else
- rxrpc_put_service_conn(conn);
- }
- static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn,
- unsigned long expire_at)
- {
- timer_reduce(&conn->timer, expire_at);
- }
- /*
- * conn_service.c
- */
- struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *,
- struct sk_buff *);
- struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t);
- void rxrpc_new_incoming_connection(struct rxrpc_sock *,
- struct rxrpc_connection *, struct sk_buff *);
- void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
- /*
- * input.c
- */
- int rxrpc_input_packet(struct sock *, 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 *, time64_t,
- u32);
- /*
- * local_event.c
- */
- extern void rxrpc_process_local_events(struct rxrpc_local *);
- /*
- * local_object.c
- */
- struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *);
- struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *);
- struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *);
- void rxrpc_put_local(struct rxrpc_local *);
- struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *);
- void rxrpc_unuse_local(struct rxrpc_local *);
- void rxrpc_queue_local(struct rxrpc_local *);
- void rxrpc_destroy_all_locals(struct rxrpc_net *);
- static inline bool __rxrpc_unuse_local(struct rxrpc_local *local)
- {
- return atomic_dec_return(&local->active_users) == 0;
- }
- static inline bool __rxrpc_use_local(struct rxrpc_local *local)
- {
- return atomic_fetch_add_unless(&local->active_users, 1, 0) != 0;
- }
- /*
- * 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 unsigned long rxrpc_resend_timeout;
- extern const s8 rxrpc_ack_priority[];
- /*
- * net_ns.c
- */
- extern unsigned int rxrpc_net_id;
- extern struct pernet_operations rxrpc_net_ops;
- static inline struct rxrpc_net *rxrpc_net(struct net *net)
- {
- return net_generic(net, rxrpc_net_id);
- }
- /*
- * output.c
- */
- int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *);
- int rxrpc_send_abort_packet(struct rxrpc_call *);
- int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool);
- void rxrpc_reject_packets(struct rxrpc_local *);
- void rxrpc_send_keepalive(struct rxrpc_peer *);
- /*
- * peer_event.c
- */
- void rxrpc_error_report(struct sock *);
- void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace,
- rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t);
- void rxrpc_peer_keepalive_worker(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_sock *, struct rxrpc_local *,
- struct sockaddr_rxrpc *, gfp_t);
- struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t);
- void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *,
- struct rxrpc_peer *);
- void rxrpc_destroy_all_peers(struct rxrpc_net *);
- struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *);
- struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *);
- void rxrpc_put_peer(struct rxrpc_peer *);
- void rxrpc_put_peer_locked(struct rxrpc_peer *);
- /*
- * proc.c
- */
- extern const struct seq_operations rxrpc_call_seq_ops;
- extern const struct seq_operations rxrpc_connection_seq_ops;
- /*
- * recvmsg.c
- */
- void rxrpc_notify_socket(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 *, enum rxrpc_skb_trace);
- void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace);
- void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace);
- void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace);
- void rxrpc_lose_skb(struct sk_buff *, enum rxrpc_skb_trace);
- 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 rxrpc_local *, struct sockaddr_rxrpc *,
- struct sk_buff *);
- static inline bool before(u32 seq1, u32 seq2)
- {
- return (s32)(seq1 - seq2) < 0;
- }
- static inline bool before_eq(u32 seq1, u32 seq2)
- {
- return (s32)(seq1 - seq2) <= 0;
- }
- static inline bool after(u32 seq1, u32 seq2)
- {
- return (s32)(seq1 - seq2) > 0;
- }
- static inline bool after_eq(u32 seq1, u32 seq2)
- {
- return (s32)(seq1 - seq2) >= 0;
- }
- /*
- * 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 { \
- __typeof__(X) _x = (X); \
- __typeof__(Y) _y = (__typeof__(X))(Y); \
- if (unlikely(!(_x OP _y))) { \
- pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
- (unsigned long)_x, (unsigned long)_x, #OP, \
- (unsigned long)_y, (unsigned long)_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 { \
- __typeof__(X) _x = (X); \
- __typeof__(Y) _y = (__typeof__(X))(Y); \
- if (unlikely((C) && !(_x OP _y))) { \
- pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
- (unsigned long)_x, (unsigned long)_x, #OP, \
- (unsigned long)_y, (unsigned long)_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 */
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