1060 lines
33 KiB
C
1060 lines
33 KiB
C
/* AF_RXRPC internal definitions
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*
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* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/atomic.h>
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#include <linux/seqlock.h>
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#include <net/sock.h>
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#include <net/af_rxrpc.h>
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#include <rxrpc/packet.h>
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#if 0
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#define CHECK_SLAB_OKAY(X) \
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BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \
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(POISON_FREE << 8 | POISON_FREE))
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#else
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#define CHECK_SLAB_OKAY(X) do {} while (0)
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#endif
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#define FCRYPT_BSIZE 8
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struct rxrpc_crypt {
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union {
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u8 x[FCRYPT_BSIZE];
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__be32 n[2];
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};
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} __attribute__((aligned(8)));
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#define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS))
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#define rxrpc_queue_delayed_work(WS,D) \
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queue_delayed_work(rxrpc_workqueue, (WS), (D))
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struct rxrpc_connection;
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/*
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* Mark applied to socket buffers.
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*/
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enum rxrpc_skb_mark {
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RXRPC_SKB_MARK_DATA, /* data message */
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RXRPC_SKB_MARK_FINAL_ACK, /* final ACK received message */
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RXRPC_SKB_MARK_BUSY, /* server busy message */
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RXRPC_SKB_MARK_REMOTE_ABORT, /* remote abort message */
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RXRPC_SKB_MARK_LOCAL_ABORT, /* local abort message */
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RXRPC_SKB_MARK_NET_ERROR, /* network error message */
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RXRPC_SKB_MARK_LOCAL_ERROR, /* local error message */
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RXRPC_SKB_MARK_NEW_CALL, /* local error message */
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};
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/*
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* sk_state for RxRPC sockets
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*/
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enum {
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RXRPC_UNBOUND = 0,
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RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */
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RXRPC_CLIENT_BOUND, /* client local address bound */
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RXRPC_SERVER_BOUND, /* server local address bound */
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RXRPC_SERVER_LISTENING, /* server listening for connections */
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RXRPC_CLOSE, /* socket is being closed */
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};
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/*
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* RxRPC socket definition
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*/
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struct rxrpc_sock {
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/* WARNING: sk has to be the first member */
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struct sock sk;
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rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */
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struct rxrpc_local *local; /* local endpoint */
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struct list_head listen_link; /* link in the local endpoint's listen list */
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struct list_head secureq; /* calls awaiting connection security clearance */
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struct list_head acceptq; /* calls awaiting acceptance */
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struct key *key; /* security for this socket */
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struct key *securities; /* list of server security descriptors */
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struct rb_root calls; /* outstanding calls on this socket */
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unsigned long flags;
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#define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */
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rwlock_t call_lock; /* lock for calls */
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u32 min_sec_level; /* minimum security level */
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#define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT
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bool exclusive; /* Exclusive connection for a client socket */
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sa_family_t family; /* Protocol family created with */
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struct sockaddr_rxrpc srx; /* local address */
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struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */
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};
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#define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)
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/*
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* CPU-byteorder normalised Rx packet header.
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*/
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struct rxrpc_host_header {
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u32 epoch; /* client boot timestamp */
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u32 cid; /* connection and channel ID */
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u32 callNumber; /* call ID (0 for connection-level packets) */
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u32 seq; /* sequence number of pkt in call stream */
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u32 serial; /* serial number of pkt sent to network */
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u8 type; /* packet type */
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u8 flags; /* packet flags */
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u8 userStatus; /* app-layer defined status */
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u8 securityIndex; /* security protocol ID */
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union {
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u16 _rsvd; /* reserved */
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u16 cksum; /* kerberos security checksum */
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};
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u16 serviceId; /* service ID */
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} __packed;
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/*
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* RxRPC socket buffer private variables
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* - max 48 bytes (struct sk_buff::cb)
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*/
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struct rxrpc_skb_priv {
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struct rxrpc_call *call; /* call with which associated */
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unsigned long resend_at; /* time in jiffies at which to resend */
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union {
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unsigned int offset; /* offset into buffer of next read */
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int remain; /* amount of space remaining for next write */
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u32 error; /* network error code */
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bool need_resend; /* T if needs resending */
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};
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struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */
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};
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#define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
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/*
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* RxRPC security module interface
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*/
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struct rxrpc_security {
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const char *name; /* name of this service */
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u8 security_index; /* security type provided */
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/* Initialise a security service */
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int (*init)(void);
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/* Clean up a security service */
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void (*exit)(void);
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/* initialise a connection's security */
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int (*init_connection_security)(struct rxrpc_connection *);
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/* prime a connection's packet security */
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int (*prime_packet_security)(struct rxrpc_connection *);
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/* impose security on a packet */
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int (*secure_packet)(struct rxrpc_call *,
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struct sk_buff *,
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size_t,
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void *);
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/* verify the security on a received packet */
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int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, u32 *);
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/* issue a challenge */
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int (*issue_challenge)(struct rxrpc_connection *);
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/* respond to a challenge */
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int (*respond_to_challenge)(struct rxrpc_connection *,
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struct sk_buff *,
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u32 *);
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/* verify a response */
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int (*verify_response)(struct rxrpc_connection *,
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struct sk_buff *,
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u32 *);
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/* clear connection security */
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void (*clear)(struct rxrpc_connection *);
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};
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/*
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* RxRPC local transport endpoint description
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* - owned by a single AF_RXRPC socket
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* - pointed to by transport socket struct sk_user_data
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*/
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struct rxrpc_local {
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struct rcu_head rcu;
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atomic_t usage;
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struct list_head link;
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struct socket *socket; /* my UDP socket */
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struct work_struct processor;
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struct list_head services; /* services listening on this endpoint */
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struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */
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struct sk_buff_head accept_queue; /* incoming calls awaiting acceptance */
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struct sk_buff_head reject_queue; /* packets awaiting rejection */
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struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */
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struct rb_root client_conns; /* Client connections by socket params */
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spinlock_t client_conns_lock; /* Lock for client_conns */
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spinlock_t lock; /* access lock */
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rwlock_t services_lock; /* lock for services list */
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int debug_id; /* debug ID for printks */
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bool dead;
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struct sockaddr_rxrpc srx; /* local address */
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};
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/*
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* RxRPC remote transport endpoint definition
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* - matched by local endpoint, remote port, address and protocol type
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*/
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struct rxrpc_peer {
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struct rcu_head rcu; /* This must be first */
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atomic_t usage;
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unsigned long hash_key;
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struct hlist_node hash_link;
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struct rxrpc_local *local;
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struct hlist_head error_targets; /* targets for net error distribution */
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struct work_struct error_distributor;
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struct rb_root service_conns; /* Service connections */
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seqlock_t service_conn_lock;
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spinlock_t lock; /* access lock */
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unsigned int if_mtu; /* interface MTU for this peer */
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unsigned int mtu; /* network MTU for this peer */
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unsigned int maxdata; /* data size (MTU - hdrsize) */
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unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */
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int debug_id; /* debug ID for printks */
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int error_report; /* Net (+0) or local (+1000000) to distribute */
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#define RXRPC_LOCAL_ERROR_OFFSET 1000000
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struct sockaddr_rxrpc srx; /* remote address */
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/* calculated RTT cache */
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#define RXRPC_RTT_CACHE_SIZE 32
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suseconds_t rtt; /* current RTT estimate (in uS) */
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unsigned int rtt_point; /* next entry at which to insert */
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unsigned int rtt_usage; /* amount of cache actually used */
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suseconds_t rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */
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};
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/*
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* Keys for matching a connection.
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*/
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struct rxrpc_conn_proto {
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union {
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struct {
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u32 epoch; /* epoch of this connection */
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u32 cid; /* connection ID */
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};
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u64 index_key;
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};
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};
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struct rxrpc_conn_parameters {
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struct rxrpc_local *local; /* Representation of local endpoint */
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struct rxrpc_peer *peer; /* Remote endpoint */
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struct key *key; /* Security details */
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bool exclusive; /* T if conn is exclusive */
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u16 service_id; /* Service ID for this connection */
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u32 security_level; /* Security level selected */
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};
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/*
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* Bits in the connection flags.
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*/
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enum rxrpc_conn_flag {
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RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */
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RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */
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RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */
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RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */
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RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */
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RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */
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};
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/*
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* Events that can be raised upon a connection.
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*/
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enum rxrpc_conn_event {
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RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */
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};
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/*
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* The connection cache state.
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*/
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enum rxrpc_conn_cache_state {
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RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */
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RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */
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RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */
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RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */
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RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */
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};
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/*
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* The connection protocol state.
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*/
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enum rxrpc_conn_proto_state {
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RXRPC_CONN_UNUSED, /* Connection not yet attempted */
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RXRPC_CONN_CLIENT, /* Client connection */
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RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */
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RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */
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RXRPC_CONN_SERVICE, /* Service secured connection */
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RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */
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RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */
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RXRPC_CONN__NR_STATES
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};
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/*
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* RxRPC connection definition
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* - matched by { local, peer, epoch, conn_id, direction }
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* - each connection can only handle four simultaneous calls
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*/
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struct rxrpc_connection {
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struct rxrpc_conn_proto proto;
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struct rxrpc_conn_parameters params;
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atomic_t usage;
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struct rcu_head rcu;
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struct list_head cache_link;
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spinlock_t channel_lock;
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unsigned char active_chans; /* Mask of active channels */
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#define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1)
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struct list_head waiting_calls; /* Calls waiting for channels */
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struct rxrpc_channel {
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struct rxrpc_call __rcu *call; /* Active call */
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u32 call_id; /* ID of current call */
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u32 call_counter; /* Call ID counter */
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u32 last_call; /* ID of last call */
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u8 last_type; /* Type of last packet */
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u16 last_service_id;
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union {
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u32 last_seq;
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u32 last_abort;
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};
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} channels[RXRPC_MAXCALLS];
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struct work_struct processor; /* connection event processor */
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union {
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struct rb_node client_node; /* Node in local->client_conns */
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struct rb_node service_node; /* Node in peer->service_conns */
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};
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struct list_head proc_link; /* link in procfs list */
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struct list_head link; /* link in master connection list */
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struct sk_buff_head rx_queue; /* received conn-level packets */
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const struct rxrpc_security *security; /* applied security module */
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struct key *server_key; /* security for this service */
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struct crypto_skcipher *cipher; /* encryption handle */
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struct rxrpc_crypt csum_iv; /* packet checksum base */
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unsigned long flags;
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unsigned long events;
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unsigned long idle_timestamp; /* Time at which last became idle */
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spinlock_t state_lock; /* state-change lock */
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enum rxrpc_conn_cache_state cache_state : 8;
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enum rxrpc_conn_proto_state state : 8; /* current state of connection */
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u32 local_abort; /* local abort code */
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u32 remote_abort; /* remote abort code */
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int debug_id; /* debug ID for printks */
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atomic_t serial; /* packet serial number counter */
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unsigned int hi_serial; /* highest serial number received */
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u8 size_align; /* data size alignment (for security) */
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u8 header_size; /* rxrpc + security header size */
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u8 security_size; /* security header size */
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u32 security_nonce; /* response re-use preventer */
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u8 security_ix; /* security type */
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u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
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};
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/*
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* Flags in call->flags.
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*/
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enum rxrpc_call_flag {
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RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */
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RXRPC_CALL_TERMINAL_MSG, /* call has given the socket its final message */
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RXRPC_CALL_RCVD_LAST, /* all packets received */
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RXRPC_CALL_RUN_RTIMER, /* Tx resend timer started */
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RXRPC_CALL_TX_SOFT_ACK, /* sent some soft ACKs */
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RXRPC_CALL_INIT_ACCEPT, /* acceptance was initiated */
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RXRPC_CALL_HAS_USERID, /* has a user ID attached */
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RXRPC_CALL_EXPECT_OOS, /* expect out of sequence packets */
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RXRPC_CALL_IS_SERVICE, /* Call is service call */
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RXRPC_CALL_EXPOSED, /* The call was exposed to the world */
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RXRPC_CALL_RX_NO_MORE, /* Don't indicate MSG_MORE from recvmsg() */
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};
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/*
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* Events that can be raised on a call.
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*/
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enum rxrpc_call_event {
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RXRPC_CALL_EV_RCVD_ACKALL, /* ACKALL or reply received */
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RXRPC_CALL_EV_RCVD_BUSY, /* busy packet received */
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RXRPC_CALL_EV_RCVD_ABORT, /* abort packet received */
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RXRPC_CALL_EV_RCVD_ERROR, /* network error received */
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RXRPC_CALL_EV_ACK_FINAL, /* need to generate final ACK (and release call) */
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RXRPC_CALL_EV_ACK, /* need to generate ACK */
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RXRPC_CALL_EV_REJECT_BUSY, /* need to generate busy message */
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RXRPC_CALL_EV_ABORT, /* need to generate abort */
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RXRPC_CALL_EV_CONN_ABORT, /* local connection abort generated */
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RXRPC_CALL_EV_RESEND_TIMER, /* Tx resend timer expired */
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RXRPC_CALL_EV_RESEND, /* Tx resend required */
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RXRPC_CALL_EV_DRAIN_RX_OOS, /* drain the Rx out of sequence queue */
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RXRPC_CALL_EV_LIFE_TIMER, /* call's lifetimer ran out */
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RXRPC_CALL_EV_ACCEPTED, /* incoming call accepted by userspace app */
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RXRPC_CALL_EV_SECURED, /* incoming call's connection is now secure */
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RXRPC_CALL_EV_POST_ACCEPT, /* need to post an "accept?" message to the app */
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};
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/*
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* The states that a call can be in.
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*/
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enum rxrpc_call_state {
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RXRPC_CALL_UNINITIALISED,
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RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */
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RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */
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RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */
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RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */
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RXRPC_CALL_CLIENT_FINAL_ACK, /* - client sending final ACK phase */
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RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */
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RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */
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RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */
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RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */
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RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */
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RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */
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RXRPC_CALL_COMPLETE, /* - call complete */
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NR__RXRPC_CALL_STATES
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};
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/*
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* Call completion condition (state == RXRPC_CALL_COMPLETE).
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*/
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enum rxrpc_call_completion {
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RXRPC_CALL_SUCCEEDED, /* - Normal termination */
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RXRPC_CALL_SERVER_BUSY, /* - call rejected by busy server */
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RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */
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RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */
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RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */
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RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */
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NR__RXRPC_CALL_COMPLETIONS
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};
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/*
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* RxRPC call definition
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* - matched by { connection, call_id }
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*/
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struct rxrpc_call {
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struct rcu_head rcu;
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struct rxrpc_connection *conn; /* connection carrying call */
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struct rxrpc_peer *peer; /* Peer record for remote address */
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struct rxrpc_sock __rcu *socket; /* socket responsible */
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struct timer_list lifetimer; /* lifetime remaining on call */
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struct timer_list ack_timer; /* ACK generation timer */
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struct timer_list resend_timer; /* Tx resend timer */
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struct work_struct processor; /* packet processor and ACK generator */
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rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */
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struct list_head link; /* link in master call list */
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struct list_head chan_wait_link; /* Link in conn->waiting_calls */
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struct hlist_node error_link; /* link in error distribution list */
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struct list_head accept_link; /* calls awaiting acceptance */
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struct rb_node sock_node; /* node in socket call tree */
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struct sk_buff_head rx_queue; /* received packets */
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struct sk_buff_head rx_oos_queue; /* packets received out of sequence */
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struct sk_buff_head knlrecv_queue; /* Queue for kernel_recv [TODO: replace this] */
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struct sk_buff *tx_pending; /* Tx socket buffer being filled */
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wait_queue_head_t waitq; /* Wait queue for channel or Tx */
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__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 */
|
|
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 */
|
|
|
|
/* 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];
|
|
};
|
|
|
|
enum rxrpc_call_trace {
|
|
rxrpc_call_new_client,
|
|
rxrpc_call_new_service,
|
|
rxrpc_call_queued,
|
|
rxrpc_call_queued_ref,
|
|
rxrpc_call_seen,
|
|
rxrpc_call_got,
|
|
rxrpc_call_got_skb,
|
|
rxrpc_call_got_userid,
|
|
rxrpc_call_put,
|
|
rxrpc_call_put_skb,
|
|
rxrpc_call_put_userid,
|
|
rxrpc_call_put_noqueue,
|
|
rxrpc_call__nr_trace
|
|
};
|
|
|
|
extern const char rxrpc_call_traces[rxrpc_call__nr_trace][4];
|
|
|
|
#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 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_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_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)
|
|
{
|
|
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(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_call_packet(struct rxrpc_call *, u8);
|
|
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
|
|
*/
|
|
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 */
|