1331 строка
40 KiB
C
1331 строка
40 KiB
C
/* AF_RXRPC internal definitions
|
|
*
|
|
* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
|
|
* Written by David Howells (dhowells@redhat.com)
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
|
|
#include <linux/atomic.h>
|
|
#include <linux/seqlock.h>
|
|
#include <net/sock.h>
|
|
#include <net/af_rxrpc.h>
|
|
#include <rxrpc/packet.h>
|
|
|
|
#if 0
|
|
#define CHECK_SLAB_OKAY(X) \
|
|
BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \
|
|
(POISON_FREE << 8 | POISON_FREE))
|
|
#else
|
|
#define CHECK_SLAB_OKAY(X) do {} while (0)
|
|
#endif
|
|
|
|
#define FCRYPT_BSIZE 8
|
|
struct rxrpc_crypt {
|
|
union {
|
|
u8 x[FCRYPT_BSIZE];
|
|
__be32 n[2];
|
|
};
|
|
} __attribute__((aligned(8)));
|
|
|
|
#define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS))
|
|
#define rxrpc_queue_delayed_work(WS,D) \
|
|
queue_delayed_work(rxrpc_workqueue, (WS), (D))
|
|
|
|
struct rxrpc_connection;
|
|
|
|
/*
|
|
* Mark applied to socket buffers.
|
|
*/
|
|
enum rxrpc_skb_mark {
|
|
RXRPC_SKB_MARK_DATA, /* data message */
|
|
RXRPC_SKB_MARK_FINAL_ACK, /* final ACK received message */
|
|
RXRPC_SKB_MARK_BUSY, /* server busy message */
|
|
RXRPC_SKB_MARK_REMOTE_ABORT, /* remote abort message */
|
|
RXRPC_SKB_MARK_LOCAL_ABORT, /* local abort message */
|
|
RXRPC_SKB_MARK_NET_ERROR, /* network error message */
|
|
RXRPC_SKB_MARK_LOCAL_ERROR, /* local error message */
|
|
RXRPC_SKB_MARK_NEW_CALL, /* local error message */
|
|
};
|
|
|
|
/*
|
|
* sk_state for RxRPC sockets
|
|
*/
|
|
enum {
|
|
RXRPC_UNBOUND = 0,
|
|
RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */
|
|
RXRPC_CLIENT_BOUND, /* client local address bound */
|
|
RXRPC_SERVER_BOUND, /* server local address bound */
|
|
RXRPC_SERVER_LISTENING, /* server listening for connections */
|
|
RXRPC_CLOSE, /* socket is being closed */
|
|
};
|
|
|
|
/*
|
|
* Service backlog preallocation.
|
|
*
|
|
* This contains circular buffers of preallocated peers, connections and calls
|
|
* for incoming service calls and their head and tail pointers. This allows
|
|
* calls to be set up in the data_ready handler, thereby avoiding the need to
|
|
* shuffle packets around so much.
|
|
*/
|
|
struct rxrpc_backlog {
|
|
unsigned short peer_backlog_head;
|
|
unsigned short peer_backlog_tail;
|
|
unsigned short conn_backlog_head;
|
|
unsigned short conn_backlog_tail;
|
|
unsigned short call_backlog_head;
|
|
unsigned short call_backlog_tail;
|
|
#define RXRPC_BACKLOG_MAX 32
|
|
struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX];
|
|
struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX];
|
|
struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX];
|
|
};
|
|
|
|
/*
|
|
* RxRPC socket definition
|
|
*/
|
|
struct rxrpc_sock {
|
|
/* WARNING: sk has to be the first member */
|
|
struct sock sk;
|
|
rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */
|
|
rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */
|
|
struct rxrpc_local *local; /* local endpoint */
|
|
struct rxrpc_backlog *backlog; /* Preallocation for services */
|
|
spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */
|
|
struct list_head sock_calls; /* List of calls owned by this socket */
|
|
struct list_head to_be_accepted; /* calls awaiting acceptance */
|
|
struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */
|
|
rwlock_t recvmsg_lock; /* Lock for recvmsg_q */
|
|
struct key *key; /* security for this socket */
|
|
struct key *securities; /* list of server security descriptors */
|
|
struct rb_root calls; /* User ID -> call mapping */
|
|
unsigned long flags;
|
|
#define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */
|
|
rwlock_t call_lock; /* lock for calls */
|
|
u32 min_sec_level; /* minimum security level */
|
|
#define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT
|
|
bool exclusive; /* Exclusive connection for a client socket */
|
|
sa_family_t family; /* Protocol family created with */
|
|
struct sockaddr_rxrpc srx; /* local address */
|
|
struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */
|
|
};
|
|
|
|
#define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)
|
|
|
|
/*
|
|
* CPU-byteorder normalised Rx packet header.
|
|
*/
|
|
struct rxrpc_host_header {
|
|
u32 epoch; /* client boot timestamp */
|
|
u32 cid; /* connection and channel ID */
|
|
u32 callNumber; /* call ID (0 for connection-level packets) */
|
|
u32 seq; /* sequence number of pkt in call stream */
|
|
u32 serial; /* serial number of pkt sent to network */
|
|
u8 type; /* packet type */
|
|
u8 flags; /* packet flags */
|
|
u8 userStatus; /* app-layer defined status */
|
|
u8 securityIndex; /* security protocol ID */
|
|
union {
|
|
u16 _rsvd; /* reserved */
|
|
u16 cksum; /* kerberos security checksum */
|
|
};
|
|
u16 serviceId; /* service ID */
|
|
} __packed;
|
|
|
|
/*
|
|
* RxRPC socket buffer private variables
|
|
* - max 48 bytes (struct sk_buff::cb)
|
|
*/
|
|
struct rxrpc_skb_priv {
|
|
union {
|
|
u8 nr_jumbo; /* Number of jumbo subpackets */
|
|
};
|
|
union {
|
|
int remain; /* amount of space remaining for next write */
|
|
};
|
|
|
|
struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */
|
|
};
|
|
|
|
#define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
|
|
|
|
/*
|
|
* RxRPC security module interface
|
|
*/
|
|
struct rxrpc_security {
|
|
const char *name; /* name of this service */
|
|
u8 security_index; /* security type provided */
|
|
|
|
/* Initialise a security service */
|
|
int (*init)(void);
|
|
|
|
/* Clean up a security service */
|
|
void (*exit)(void);
|
|
|
|
/* initialise a connection's security */
|
|
int (*init_connection_security)(struct rxrpc_connection *);
|
|
|
|
/* prime a connection's packet security */
|
|
int (*prime_packet_security)(struct rxrpc_connection *);
|
|
|
|
/* impose security on a packet */
|
|
int (*secure_packet)(struct rxrpc_call *,
|
|
struct sk_buff *,
|
|
size_t,
|
|
void *);
|
|
|
|
/* verify the security on a received packet */
|
|
int (*verify_packet)(struct rxrpc_call *, struct sk_buff *,
|
|
unsigned int, unsigned int, rxrpc_seq_t, u16);
|
|
|
|
/* Locate the data in a received packet that has been verified. */
|
|
void (*locate_data)(struct rxrpc_call *, struct sk_buff *,
|
|
unsigned int *, unsigned int *);
|
|
|
|
/* issue a challenge */
|
|
int (*issue_challenge)(struct rxrpc_connection *);
|
|
|
|
/* respond to a challenge */
|
|
int (*respond_to_challenge)(struct rxrpc_connection *,
|
|
struct sk_buff *,
|
|
u32 *);
|
|
|
|
/* verify a response */
|
|
int (*verify_response)(struct rxrpc_connection *,
|
|
struct sk_buff *,
|
|
u32 *);
|
|
|
|
/* clear connection security */
|
|
void (*clear)(struct rxrpc_connection *);
|
|
};
|
|
|
|
/*
|
|
* RxRPC local transport endpoint description
|
|
* - owned by a single AF_RXRPC socket
|
|
* - pointed to by transport socket struct sk_user_data
|
|
*/
|
|
struct rxrpc_local {
|
|
struct rcu_head rcu;
|
|
atomic_t usage;
|
|
struct list_head link;
|
|
struct socket *socket; /* my UDP socket */
|
|
struct work_struct processor;
|
|
struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */
|
|
struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */
|
|
struct sk_buff_head reject_queue; /* packets awaiting rejection */
|
|
struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */
|
|
struct rb_root client_conns; /* Client connections by socket params */
|
|
spinlock_t client_conns_lock; /* Lock for client_conns */
|
|
spinlock_t lock; /* access lock */
|
|
rwlock_t services_lock; /* lock for services list */
|
|
int debug_id; /* debug ID for printks */
|
|
bool dead;
|
|
struct sockaddr_rxrpc srx; /* local address */
|
|
};
|
|
|
|
/*
|
|
* RxRPC remote transport endpoint definition
|
|
* - matched by local endpoint, remote port, address and protocol type
|
|
*/
|
|
struct rxrpc_peer {
|
|
struct rcu_head rcu; /* This must be first */
|
|
atomic_t usage;
|
|
unsigned long hash_key;
|
|
struct hlist_node hash_link;
|
|
struct rxrpc_local *local;
|
|
struct hlist_head error_targets; /* targets for net error distribution */
|
|
struct work_struct error_distributor;
|
|
struct rb_root service_conns; /* Service connections */
|
|
seqlock_t service_conn_lock;
|
|
spinlock_t lock; /* access lock */
|
|
unsigned int if_mtu; /* interface MTU for this peer */
|
|
unsigned int mtu; /* network MTU for this peer */
|
|
unsigned int maxdata; /* data size (MTU - hdrsize) */
|
|
unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */
|
|
int debug_id; /* debug ID for printks */
|
|
int error_report; /* Net (+0) or local (+1000000) to distribute */
|
|
#define RXRPC_LOCAL_ERROR_OFFSET 1000000
|
|
struct sockaddr_rxrpc srx; /* remote address */
|
|
|
|
/* calculated RTT cache */
|
|
#define RXRPC_RTT_CACHE_SIZE 32
|
|
ktime_t rtt_last_req; /* Time of last RTT request */
|
|
u64 rtt; /* Current RTT estimate (in nS) */
|
|
u64 rtt_sum; /* Sum of cache contents */
|
|
u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */
|
|
u8 rtt_cursor; /* next entry at which to insert */
|
|
u8 rtt_usage; /* amount of cache actually used */
|
|
};
|
|
|
|
/*
|
|
* Keys for matching a connection.
|
|
*/
|
|
struct rxrpc_conn_proto {
|
|
union {
|
|
struct {
|
|
u32 epoch; /* epoch of this connection */
|
|
u32 cid; /* connection ID */
|
|
};
|
|
u64 index_key;
|
|
};
|
|
};
|
|
|
|
struct rxrpc_conn_parameters {
|
|
struct rxrpc_local *local; /* Representation of local endpoint */
|
|
struct rxrpc_peer *peer; /* Remote endpoint */
|
|
struct key *key; /* Security details */
|
|
bool exclusive; /* T if conn is exclusive */
|
|
u16 service_id; /* Service ID for this connection */
|
|
u32 security_level; /* Security level selected */
|
|
};
|
|
|
|
/*
|
|
* Bits in the connection flags.
|
|
*/
|
|
enum rxrpc_conn_flag {
|
|
RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */
|
|
RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */
|
|
RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */
|
|
RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */
|
|
RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */
|
|
RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */
|
|
};
|
|
|
|
/*
|
|
* Events that can be raised upon a connection.
|
|
*/
|
|
enum rxrpc_conn_event {
|
|
RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */
|
|
};
|
|
|
|
/*
|
|
* The connection cache state.
|
|
*/
|
|
enum rxrpc_conn_cache_state {
|
|
RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */
|
|
RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */
|
|
RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */
|
|
RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */
|
|
RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */
|
|
RXRPC_CONN__NR_CACHE_STATES
|
|
};
|
|
|
|
/*
|
|
* The connection protocol state.
|
|
*/
|
|
enum rxrpc_conn_proto_state {
|
|
RXRPC_CONN_UNUSED, /* Connection not yet attempted */
|
|
RXRPC_CONN_CLIENT, /* Client connection */
|
|
RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */
|
|
RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */
|
|
RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */
|
|
RXRPC_CONN_SERVICE, /* Service secured connection */
|
|
RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */
|
|
RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */
|
|
RXRPC_CONN__NR_STATES
|
|
};
|
|
|
|
/*
|
|
* RxRPC connection definition
|
|
* - matched by { local, peer, epoch, conn_id, direction }
|
|
* - each connection can only handle four simultaneous calls
|
|
*/
|
|
struct rxrpc_connection {
|
|
struct rxrpc_conn_proto proto;
|
|
struct rxrpc_conn_parameters params;
|
|
|
|
atomic_t usage;
|
|
struct rcu_head rcu;
|
|
struct list_head cache_link;
|
|
|
|
spinlock_t channel_lock;
|
|
unsigned char active_chans; /* Mask of active channels */
|
|
#define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1)
|
|
struct list_head waiting_calls; /* Calls waiting for channels */
|
|
struct rxrpc_channel {
|
|
struct rxrpc_call __rcu *call; /* Active call */
|
|
u32 call_id; /* ID of current call */
|
|
u32 call_counter; /* Call ID counter */
|
|
u32 last_call; /* ID of last call */
|
|
u8 last_type; /* Type of last packet */
|
|
u16 last_service_id;
|
|
union {
|
|
u32 last_seq;
|
|
u32 last_abort;
|
|
};
|
|
} channels[RXRPC_MAXCALLS];
|
|
|
|
struct work_struct processor; /* connection event processor */
|
|
union {
|
|
struct rb_node client_node; /* Node in local->client_conns */
|
|
struct rb_node service_node; /* Node in peer->service_conns */
|
|
};
|
|
struct list_head proc_link; /* link in procfs list */
|
|
struct list_head link; /* link in master connection list */
|
|
struct sk_buff_head rx_queue; /* received conn-level packets */
|
|
const struct rxrpc_security *security; /* applied security module */
|
|
struct key *server_key; /* security for this service */
|
|
struct crypto_skcipher *cipher; /* encryption handle */
|
|
struct rxrpc_crypt csum_iv; /* packet checksum base */
|
|
unsigned long flags;
|
|
unsigned long events;
|
|
unsigned long idle_timestamp; /* Time at which last became idle */
|
|
spinlock_t state_lock; /* state-change lock */
|
|
enum rxrpc_conn_cache_state cache_state;
|
|
enum rxrpc_conn_proto_state state; /* current state of connection */
|
|
u32 local_abort; /* local abort code */
|
|
u32 remote_abort; /* remote abort code */
|
|
int debug_id; /* debug ID for printks */
|
|
atomic_t serial; /* packet serial number counter */
|
|
unsigned int hi_serial; /* highest serial number received */
|
|
u32 security_nonce; /* response re-use preventer */
|
|
u8 size_align; /* data size alignment (for security) */
|
|
u8 security_size; /* security header size */
|
|
u8 security_ix; /* security type */
|
|
u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
|
|
};
|
|
|
|
/*
|
|
* Flags in call->flags.
|
|
*/
|
|
enum rxrpc_call_flag {
|
|
RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */
|
|
RXRPC_CALL_HAS_USERID, /* has a user ID attached */
|
|
RXRPC_CALL_IS_SERVICE, /* Call is service call */
|
|
RXRPC_CALL_EXPOSED, /* The call was exposed to the world */
|
|
RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */
|
|
RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */
|
|
RXRPC_CALL_SEND_PING, /* A ping will need to be sent */
|
|
RXRPC_CALL_PINGING, /* Ping in process */
|
|
RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */
|
|
};
|
|
|
|
/*
|
|
* 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_TIMER, /* Timer expired */
|
|
RXRPC_CALL_EV_RESEND, /* Tx resend required */
|
|
RXRPC_CALL_EV_PING, /* Ping send required */
|
|
};
|
|
|
|
/*
|
|
* 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 */
|
|
ktime_t ack_at; /* When deferred ACK needs to happen */
|
|
ktime_t resend_at; /* When next resend needs to happen */
|
|
ktime_t ping_at; /* When next to send a ping */
|
|
ktime_t expire_at; /* When the call times out */
|
|
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 */
|
|
__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;
|
|
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 32
|
|
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. */
|
|
|
|
/* 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 */
|
|
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 */
|
|
|
|
/* 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_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) */
|
|
};
|
|
|
|
/*
|
|
* 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;
|
|
};
|
|
|
|
enum rxrpc_skb_trace {
|
|
rxrpc_skb_rx_cleaned,
|
|
rxrpc_skb_rx_freed,
|
|
rxrpc_skb_rx_got,
|
|
rxrpc_skb_rx_lost,
|
|
rxrpc_skb_rx_received,
|
|
rxrpc_skb_rx_rotated,
|
|
rxrpc_skb_rx_purged,
|
|
rxrpc_skb_rx_seen,
|
|
rxrpc_skb_tx_cleaned,
|
|
rxrpc_skb_tx_freed,
|
|
rxrpc_skb_tx_got,
|
|
rxrpc_skb_tx_new,
|
|
rxrpc_skb_tx_rotated,
|
|
rxrpc_skb_tx_seen,
|
|
rxrpc_skb__nr_trace
|
|
};
|
|
|
|
extern const char rxrpc_skb_traces[rxrpc_skb__nr_trace][7];
|
|
|
|
enum rxrpc_conn_trace {
|
|
rxrpc_conn_new_client,
|
|
rxrpc_conn_new_service,
|
|
rxrpc_conn_queued,
|
|
rxrpc_conn_seen,
|
|
rxrpc_conn_got,
|
|
rxrpc_conn_put_client,
|
|
rxrpc_conn_put_service,
|
|
rxrpc_conn__nr_trace
|
|
};
|
|
|
|
extern const char rxrpc_conn_traces[rxrpc_conn__nr_trace][4];
|
|
|
|
enum rxrpc_client_trace {
|
|
rxrpc_client_activate_chans,
|
|
rxrpc_client_alloc,
|
|
rxrpc_client_chan_activate,
|
|
rxrpc_client_chan_disconnect,
|
|
rxrpc_client_chan_pass,
|
|
rxrpc_client_chan_unstarted,
|
|
rxrpc_client_cleanup,
|
|
rxrpc_client_count,
|
|
rxrpc_client_discard,
|
|
rxrpc_client_duplicate,
|
|
rxrpc_client_exposed,
|
|
rxrpc_client_replace,
|
|
rxrpc_client_to_active,
|
|
rxrpc_client_to_culled,
|
|
rxrpc_client_to_idle,
|
|
rxrpc_client_to_inactive,
|
|
rxrpc_client_to_waiting,
|
|
rxrpc_client_uncount,
|
|
rxrpc_client__nr_trace
|
|
};
|
|
|
|
extern const char rxrpc_client_traces[rxrpc_client__nr_trace][7];
|
|
extern const char rxrpc_conn_cache_states[RXRPC_CONN__NR_CACHE_STATES][5];
|
|
|
|
enum rxrpc_call_trace {
|
|
rxrpc_call_new_client,
|
|
rxrpc_call_new_service,
|
|
rxrpc_call_queued,
|
|
rxrpc_call_queued_ref,
|
|
rxrpc_call_seen,
|
|
rxrpc_call_connected,
|
|
rxrpc_call_release,
|
|
rxrpc_call_got,
|
|
rxrpc_call_got_userid,
|
|
rxrpc_call_got_kernel,
|
|
rxrpc_call_put,
|
|
rxrpc_call_put_userid,
|
|
rxrpc_call_put_kernel,
|
|
rxrpc_call_put_noqueue,
|
|
rxrpc_call_error,
|
|
rxrpc_call__nr_trace
|
|
};
|
|
|
|
extern const char rxrpc_call_traces[rxrpc_call__nr_trace][4];
|
|
|
|
enum rxrpc_transmit_trace {
|
|
rxrpc_transmit_wait,
|
|
rxrpc_transmit_queue,
|
|
rxrpc_transmit_queue_last,
|
|
rxrpc_transmit_rotate,
|
|
rxrpc_transmit_rotate_last,
|
|
rxrpc_transmit_await_reply,
|
|
rxrpc_transmit_end,
|
|
rxrpc_transmit__nr_trace
|
|
};
|
|
|
|
extern const char rxrpc_transmit_traces[rxrpc_transmit__nr_trace][4];
|
|
|
|
enum rxrpc_receive_trace {
|
|
rxrpc_receive_incoming,
|
|
rxrpc_receive_queue,
|
|
rxrpc_receive_queue_last,
|
|
rxrpc_receive_front,
|
|
rxrpc_receive_rotate,
|
|
rxrpc_receive_end,
|
|
rxrpc_receive__nr_trace
|
|
};
|
|
|
|
extern const char rxrpc_receive_traces[rxrpc_receive__nr_trace][4];
|
|
|
|
enum rxrpc_recvmsg_trace {
|
|
rxrpc_recvmsg_enter,
|
|
rxrpc_recvmsg_wait,
|
|
rxrpc_recvmsg_dequeue,
|
|
rxrpc_recvmsg_hole,
|
|
rxrpc_recvmsg_next,
|
|
rxrpc_recvmsg_cont,
|
|
rxrpc_recvmsg_full,
|
|
rxrpc_recvmsg_data_return,
|
|
rxrpc_recvmsg_terminal,
|
|
rxrpc_recvmsg_to_be_accepted,
|
|
rxrpc_recvmsg_return,
|
|
rxrpc_recvmsg__nr_trace
|
|
};
|
|
|
|
extern const char rxrpc_recvmsg_traces[rxrpc_recvmsg__nr_trace][5];
|
|
|
|
enum rxrpc_rtt_tx_trace {
|
|
rxrpc_rtt_tx_ping,
|
|
rxrpc_rtt_tx_data,
|
|
rxrpc_rtt_tx__nr_trace
|
|
};
|
|
|
|
extern const char rxrpc_rtt_tx_traces[rxrpc_rtt_tx__nr_trace][5];
|
|
|
|
enum rxrpc_rtt_rx_trace {
|
|
rxrpc_rtt_rx_ping_response,
|
|
rxrpc_rtt_rx_requested_ack,
|
|
rxrpc_rtt_rx__nr_trace
|
|
};
|
|
|
|
extern const char rxrpc_rtt_rx_traces[rxrpc_rtt_rx__nr_trace][5];
|
|
|
|
enum rxrpc_timer_trace {
|
|
rxrpc_timer_begin,
|
|
rxrpc_timer_init_for_reply,
|
|
rxrpc_timer_init_for_send_reply,
|
|
rxrpc_timer_expired,
|
|
rxrpc_timer_set_for_ack,
|
|
rxrpc_timer_set_for_ping,
|
|
rxrpc_timer_set_for_resend,
|
|
rxrpc_timer_set_for_send,
|
|
rxrpc_timer__nr_trace
|
|
};
|
|
|
|
extern const char rxrpc_timer_traces[rxrpc_timer__nr_trace][8];
|
|
|
|
enum rxrpc_propose_ack_trace {
|
|
rxrpc_propose_ack_client_tx_end,
|
|
rxrpc_propose_ack_input_data,
|
|
rxrpc_propose_ack_ping_for_lost_ack,
|
|
rxrpc_propose_ack_ping_for_lost_reply,
|
|
rxrpc_propose_ack_ping_for_params,
|
|
rxrpc_propose_ack_processing_op,
|
|
rxrpc_propose_ack_respond_to_ack,
|
|
rxrpc_propose_ack_respond_to_ping,
|
|
rxrpc_propose_ack_retry_tx,
|
|
rxrpc_propose_ack_rotate_rx,
|
|
rxrpc_propose_ack_terminal_ack,
|
|
rxrpc_propose_ack__nr_trace
|
|
};
|
|
|
|
enum rxrpc_propose_ack_outcome {
|
|
rxrpc_propose_ack_use,
|
|
rxrpc_propose_ack_update,
|
|
rxrpc_propose_ack_subsume,
|
|
rxrpc_propose_ack__nr_outcomes
|
|
};
|
|
|
|
extern const char rxrpc_propose_ack_traces[rxrpc_propose_ack__nr_trace][8];
|
|
extern const char *const rxrpc_propose_ack_outcomes[rxrpc_propose_ack__nr_outcomes];
|
|
|
|
enum rxrpc_congest_change {
|
|
rxrpc_cong_begin_retransmission,
|
|
rxrpc_cong_cleared_nacks,
|
|
rxrpc_cong_new_low_nack,
|
|
rxrpc_cong_no_change,
|
|
rxrpc_cong_progress,
|
|
rxrpc_cong_retransmit_again,
|
|
rxrpc_cong_rtt_window_end,
|
|
rxrpc_cong_saw_nack,
|
|
rxrpc_congest__nr_change
|
|
};
|
|
|
|
extern const char rxrpc_congest_modes[NR__RXRPC_CONGEST_MODES][10];
|
|
extern const char rxrpc_congest_changes[rxrpc_congest__nr_change][9];
|
|
|
|
extern const char *const rxrpc_pkts[];
|
|
extern const char rxrpc_ack_names[RXRPC_ACK__INVALID + 1][4];
|
|
|
|
#include <trace/events/rxrpc.h>
|
|
|
|
/*
|
|
* af_rxrpc.c
|
|
*/
|
|
extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs;
|
|
extern u32 rxrpc_epoch;
|
|
extern atomic_t rxrpc_debug_id;
|
|
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_connection *,
|
|
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_set_timer(struct rxrpc_call *, enum rxrpc_timer_trace, ktime_t);
|
|
void rxrpc_set_timer(struct rxrpc_call *, enum rxrpc_timer_trace, ktime_t);
|
|
void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool,
|
|
enum rxrpc_propose_ack_trace);
|
|
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_alloc_call(gfp_t);
|
|
struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
|
|
struct rxrpc_conn_parameters *,
|
|
struct sockaddr_rxrpc *,
|
|
unsigned long, gfp_t);
|
|
void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *,
|
|
struct sk_buff *);
|
|
void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *);
|
|
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 __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;
|
|
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(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;
|
|
}
|
|
|
|
/*
|
|
* 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 *);
|
|
|
|
/*
|
|
* 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 *);
|
|
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 __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_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);
|
|
}
|
|
|
|
/*
|
|
* conn_service.c
|
|
*/
|
|
struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *,
|
|
struct sk_buff *);
|
|
struct rxrpc_connection *rxrpc_prealloc_service_connection(gfp_t);
|
|
void rxrpc_new_incoming_connection(struct rxrpc_connection *, struct sk_buff *);
|
|
void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
|
|
|
|
/*
|
|
* input.c
|
|
*/
|
|
void rxrpc_data_ready(struct sock *);
|
|
|
|
/*
|
|
* 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 s8 rxrpc_ack_priority[];
|
|
|
|
/*
|
|
* output.c
|
|
*/
|
|
int rxrpc_send_ack_packet(struct rxrpc_call *, bool);
|
|
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 *);
|
|
|
|
/*
|
|
* peer_event.c
|
|
*/
|
|
void rxrpc_error_report(struct sock *);
|
|
void rxrpc_peer_error_distributor(struct work_struct *);
|
|
void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace,
|
|
rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t);
|
|
|
|
/*
|
|
* 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);
|
|
struct rxrpc_peer *rxrpc_lookup_incoming_peer(struct rxrpc_local *,
|
|
struct rxrpc_peer *);
|
|
|
|
static inline struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *peer)
|
|
{
|
|
atomic_inc(&peer->usage);
|
|
return peer;
|
|
}
|
|
|
|
static inline
|
|
struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer)
|
|
{
|
|
return atomic_inc_not_zero(&peer->usage) ? peer : NULL;
|
|
}
|
|
|
|
extern void __rxrpc_put_peer(struct rxrpc_peer *peer);
|
|
static inline void rxrpc_put_peer(struct rxrpc_peer *peer)
|
|
{
|
|
if (peer && atomic_dec_and_test(&peer->usage))
|
|
__rxrpc_put_peer(peer);
|
|
}
|
|
|
|
/*
|
|
* proc.c
|
|
*/
|
|
extern const struct file_operations rxrpc_call_seq_fops;
|
|
extern const struct file_operations rxrpc_connection_seq_fops;
|
|
|
|
/*
|
|
* recvmsg.c
|
|
*/
|
|
void rxrpc_notify_socket(struct rxrpc_call *);
|
|
int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int);
|
|
|
|
/*
|
|
* rxkad.c
|
|
*/
|
|
#ifdef CONFIG_RXKAD
|
|
extern const struct rxrpc_security rxkad;
|
|
#endif
|
|
|
|
/*
|
|
* security.c
|
|
*/
|
|
int __init rxrpc_init_security(void);
|
|
void rxrpc_exit_security(void);
|
|
int rxrpc_init_client_conn_security(struct rxrpc_connection *);
|
|
int rxrpc_init_server_conn_security(struct rxrpc_connection *);
|
|
|
|
/*
|
|
* sendmsg.c
|
|
*/
|
|
int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t);
|
|
|
|
/*
|
|
* skbuff.c
|
|
*/
|
|
void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *);
|
|
void rxrpc_packet_destructor(struct sk_buff *);
|
|
void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace);
|
|
void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace);
|
|
void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace);
|
|
void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace);
|
|
void rxrpc_lose_skb(struct sk_buff *, enum rxrpc_skb_trace);
|
|
void rxrpc_purge_queue(struct sk_buff_head *);
|
|
|
|
/*
|
|
* sysctl.c
|
|
*/
|
|
#ifdef CONFIG_SYSCTL
|
|
extern int __init rxrpc_sysctl_init(void);
|
|
extern void rxrpc_sysctl_exit(void);
|
|
#else
|
|
static inline int __init rxrpc_sysctl_init(void) { return 0; }
|
|
static inline void rxrpc_sysctl_exit(void) {}
|
|
#endif
|
|
|
|
/*
|
|
* utils.c
|
|
*/
|
|
int rxrpc_extract_addr_from_skb(struct 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 */
|