1273 lines
42 KiB
C
1273 lines
42 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/* 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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#include <linux/atomic.h>
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#include <linux/seqlock.h>
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#include <net/net_namespace.h>
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#include <net/netns/generic.h>
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#include <net/sock.h>
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#include <net/af_rxrpc.h>
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#include "protocol.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 in skb->mark. skb->priority is used
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* to pass supplementary information.
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*/
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enum rxrpc_skb_mark {
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RXRPC_SKB_MARK_REJECT_BUSY, /* Reject with BUSY */
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RXRPC_SKB_MARK_REJECT_ABORT, /* Reject with ABORT (code in skb->priority) */
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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_BOUND2, /* second server local address bound */
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RXRPC_SERVER_LISTENING, /* server listening for connections */
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RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */
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RXRPC_CLOSE, /* socket is being closed */
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};
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/*
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* Per-network namespace data.
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*/
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struct rxrpc_net {
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struct proc_dir_entry *proc_net; /* Subdir in /proc/net */
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u32 epoch; /* Local epoch for detecting local-end reset */
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struct list_head calls; /* List of calls active in this namespace */
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rwlock_t call_lock; /* Lock for ->calls */
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atomic_t nr_calls; /* Count of allocated calls */
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atomic_t nr_conns;
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struct list_head conn_proc_list; /* List of conns in this namespace for proc */
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struct list_head service_conns; /* Service conns in this namespace */
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rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */
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struct work_struct service_conn_reaper;
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struct timer_list service_conn_reap_timer;
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unsigned int nr_client_conns;
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unsigned int nr_active_client_conns;
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bool kill_all_client_conns;
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bool live;
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spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */
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spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */
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struct list_head waiting_client_conns;
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struct list_head active_client_conns;
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struct list_head idle_client_conns;
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struct work_struct client_conn_reaper;
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struct timer_list client_conn_reap_timer;
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struct list_head local_endpoints;
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struct mutex local_mutex; /* Lock for ->local_endpoints */
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DECLARE_HASHTABLE (peer_hash, 10);
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spinlock_t peer_hash_lock; /* Lock for ->peer_hash */
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#define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */
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u8 peer_keepalive_cursor;
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time64_t peer_keepalive_base;
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struct list_head peer_keepalive[32];
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struct list_head peer_keepalive_new;
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struct timer_list peer_keepalive_timer;
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struct work_struct peer_keepalive_work;
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};
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/*
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* Service backlog preallocation.
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*
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* This contains circular buffers of preallocated peers, connections and calls
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* for incoming service calls and their head and tail pointers. This allows
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* calls to be set up in the data_ready handler, thereby avoiding the need to
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* shuffle packets around so much.
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*/
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struct rxrpc_backlog {
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unsigned short peer_backlog_head;
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unsigned short peer_backlog_tail;
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unsigned short conn_backlog_head;
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unsigned short conn_backlog_tail;
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unsigned short call_backlog_head;
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unsigned short call_backlog_tail;
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#define RXRPC_BACKLOG_MAX 32
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struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX];
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struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX];
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struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX];
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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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rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */
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struct rxrpc_local *local; /* local endpoint */
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struct rxrpc_backlog *backlog; /* Preallocation for services */
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spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */
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struct list_head sock_calls; /* List of calls owned by this socket */
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struct list_head to_be_accepted; /* calls awaiting acceptance */
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struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */
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rwlock_t recvmsg_lock; /* Lock for recvmsg_q */
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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; /* User ID -> call mapping */
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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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u16 second_service; /* Additional service bound to the endpoint */
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struct {
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/* Service upgrade information */
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u16 from; /* Service ID to upgrade (if not 0) */
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u16 to; /* service ID to upgrade to */
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} service_upgrade;
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sa_family_t family; /* Protocol family created with */
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struct sockaddr_rxrpc srx; /* Primary Service/local addresses */
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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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union {
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u8 nr_jumbo; /* Number of jumbo subpackets */
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};
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union {
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int remain; /* amount of space remaining for next write */
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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 *,
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unsigned int, unsigned int, rxrpc_seq_t, u16);
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/* Locate the data in a received packet that has been verified. */
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void (*locate_data)(struct rxrpc_call *, struct sk_buff *,
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unsigned int *, unsigned int *);
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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 rxrpc_net *rxnet; /* The network ns in which this resides */
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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 rxrpc_sock __rcu *service; /* Service(s) 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 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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bool service_closed; /* Service socket closed */
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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 rb_root service_conns; /* Service connections */
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struct list_head keepalive_link; /* Link in net->peer_keepalive[] */
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time64_t last_tx_at; /* Last time packet sent here */
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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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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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spinlock_t rtt_input_lock; /* RTT lock for input routine */
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ktime_t rtt_last_req; /* Time of last RTT request */
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u64 rtt; /* Current RTT estimate (in nS) */
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u64 rtt_sum; /* Sum of cache contents */
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u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */
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u8 rtt_cursor; /* next entry at which to insert */
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u8 rtt_usage; /* amount of cache actually used */
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u8 cong_cwnd; /* Congestion window size */
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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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bool upgrade; /* T if service ID can be upgraded */
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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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RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */
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RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */
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RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */
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RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */
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RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */
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};
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#define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \
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(1UL << RXRPC_CONN_FINAL_ACK_1) | \
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(1UL << RXRPC_CONN_FINAL_ACK_2) | \
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(1UL << RXRPC_CONN_FINAL_ACK_3))
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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_UPGRADE, /* Conn is on active list, probing for upgrade */
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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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RXRPC_CONN__NR_CACHE_STATES
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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_PREALLOC, /* Service connection preallocation */
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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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unsigned long final_ack_at; /* Time at which to issue final ACK */
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struct rxrpc_call __rcu *call; /* Active call */
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unsigned int call_debug_id; /* call->debug_id */
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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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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 timer_list timer; /* Conn event timer */
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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_sync_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;
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enum rxrpc_conn_proto_state state; /* current state of connection */
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u32 abort_code; /* Abort code of connection abort */
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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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u32 security_nonce; /* response re-use preventer */
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u32 service_id; /* Service ID, possibly upgraded */
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u8 size_align; /* data size alignment (for security) */
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u8 security_size; /* security header size */
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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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short error; /* Local error code */
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};
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static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp)
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{
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return sp->hdr.flags & RXRPC_CLIENT_INITIATED;
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}
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static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp)
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{
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return !rxrpc_to_server(sp);
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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 */
|
|
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_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_IS_INTR, /* The call is interruptible */
|
|
};
|
|
|
|
/*
|
|
* 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 completion condition (state == RXRPC_CALL_COMPLETE).
|
|
*/
|
|
enum rxrpc_call_completion {
|
|
RXRPC_CALL_SUCCEEDED, /* - Normal termination */
|
|
RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */
|
|
RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */
|
|
RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */
|
|
RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */
|
|
NR__RXRPC_CALL_COMPLETIONS
|
|
};
|
|
|
|
/*
|
|
* 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 */
|
|
bool intr; /* The call is interruptible */
|
|
};
|
|
|
|
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);
|
|
void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *,
|
|
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_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 *);
|
|
|
|
/*
|
|
* 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 *);
|
|
void rxrpc_queue_local(struct rxrpc_local *);
|
|
void rxrpc_destroy_all_locals(struct rxrpc_net *);
|
|
|
|
/*
|
|
* 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 *);
|
|
|
|
/*
|
|
* proc.c
|
|
*/
|
|
extern const struct seq_operations rxrpc_call_seq_ops;
|
|
extern const struct seq_operations rxrpc_connection_seq_ops;
|
|
extern const struct seq_operations rxrpc_peer_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_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 *);
|
|
|
|
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 */
|