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Commit 63b6be55 authored by David Howells's avatar David Howells Committed by David S. Miller
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[AF_RXRPC]: Delete the old RxRPC code. 

Delete the old RxRPC code as it's now no longer used.
Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 08e0e7c8
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Showing with 9 additions and 6820 deletions
fs/Kconfig
View file @ 63b6be55
......@@ -2038,10 +2038,6 @@ config AFS_DEBUG
If unsure, say N.
config RXRPC
tristate
config 9P_FS
tristate "Plan 9 Resource Sharing Support (9P2000) (Experimental)"
depends on INET && EXPERIMENTAL
......
include/rxrpc/call.h deleted 100644 → 0
View file @ 08e0e7c8
/* call.h: Rx call record
*
* Copyright (C) 2002 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.
*/
#ifndef _LINUX_RXRPC_CALL_H
#define _LINUX_RXRPC_CALL_H
#include <rxrpc/types.h>
#include <rxrpc/rxrpc.h>
#include <rxrpc/packet.h>
#include <linux/timer.h>
#define RXRPC_CALL_ACK_WINDOW_SIZE 16
extern unsigned rxrpc_call_rcv_timeout; /* receive activity timeout (secs) */
/* application call state
* - only state 0 and ffff are reserved, the state is set to 1 after an opid is received
*/
enum rxrpc_app_cstate {
RXRPC_CSTATE_COMPLETE = 0, /* operation complete */
RXRPC_CSTATE_ERROR, /* operation ICMP error or aborted */
RXRPC_CSTATE_SRVR_RCV_OPID, /* [SERVER] receiving operation ID */
RXRPC_CSTATE_SRVR_RCV_ARGS, /* [SERVER] receiving operation data */
RXRPC_CSTATE_SRVR_GOT_ARGS, /* [SERVER] completely received operation data */
RXRPC_CSTATE_SRVR_SND_REPLY, /* [SERVER] sending operation reply */
RXRPC_CSTATE_SRVR_RCV_FINAL_ACK, /* [SERVER] receiving final ACK */
RXRPC_CSTATE_CLNT_SND_ARGS, /* [CLIENT] sending operation args */
RXRPC_CSTATE_CLNT_RCV_REPLY, /* [CLIENT] receiving operation reply */
RXRPC_CSTATE_CLNT_GOT_REPLY, /* [CLIENT] completely received operation reply */
} __attribute__((packed));
extern const char *rxrpc_call_states[];
enum rxrpc_app_estate {
RXRPC_ESTATE_NO_ERROR = 0, /* no error */
RXRPC_ESTATE_LOCAL_ABORT, /* aborted locally by application layer */
RXRPC_ESTATE_PEER_ABORT, /* aborted remotely by peer */
RXRPC_ESTATE_LOCAL_ERROR, /* local ICMP network error */
RXRPC_ESTATE_REMOTE_ERROR, /* remote ICMP network error */
} __attribute__((packed));
extern const char *rxrpc_call_error_states[];
/*****************************************************************************/
/*
* Rx call record and application scratch buffer
* - the call record occupies the bottom of a complete page
* - the application scratch buffer occupies the rest
*/
struct rxrpc_call
{
atomic_t usage;
struct rxrpc_connection *conn; /* connection upon which active */
spinlock_t lock; /* access lock */
struct module *owner; /* owner module */
wait_queue_head_t waitq; /* wait queue for events to happen */
struct list_head link; /* general internal list link */
struct list_head call_link; /* master call list link */
__be32 chan_ix; /* connection channel index */
__be32 call_id; /* call ID on connection */
unsigned long cjif; /* jiffies at call creation */
unsigned long flags; /* control flags */
#define RXRPC_CALL_ACKS_TIMO 0x00000001 /* ACKS timeout reached */
#define RXRPC_CALL_ACKR_TIMO 0x00000002 /* ACKR timeout reached */
#define RXRPC_CALL_RCV_TIMO 0x00000004 /* RCV timeout reached */
#define RXRPC_CALL_RCV_PKT 0x00000008 /* received packet */
/* transmission */
rxrpc_seq_t snd_seq_count; /* outgoing packet sequence number counter */
struct rxrpc_message *snd_nextmsg; /* next message being constructed for sending */
struct rxrpc_message *snd_ping; /* last ping message sent */
unsigned short snd_resend_cnt; /* count of resends since last ACK */
/* transmission ACK tracking */
struct list_head acks_pendq; /* messages pending ACK (ordered by seq) */
unsigned acks_pend_cnt; /* number of un-ACK'd packets */
rxrpc_seq_t acks_dftv_seq; /* highest definitively ACK'd msg seq */
struct timer_list acks_timeout; /* timeout on expected ACK */
/* reception */
struct list_head rcv_receiveq; /* messages pending reception (ordered by seq) */
struct list_head rcv_krxiodq_lk; /* krxiod queue for new inbound packets */
struct timer_list rcv_timeout; /* call receive activity timeout */
/* reception ACK'ing */
rxrpc_seq_t ackr_win_bot; /* bottom of ACK window */
rxrpc_seq_t ackr_win_top; /* top of ACK window */
rxrpc_seq_t ackr_high_seq; /* highest seqno yet received */
rxrpc_seq_net_t ackr_prev_seq; /* previous seqno received */
unsigned ackr_pend_cnt; /* number of pending ACKs */
struct timer_list ackr_dfr_timo; /* timeout on deferred ACK */
char ackr_dfr_perm; /* request for deferred ACKs permitted */
rxrpc_seq_t ackr_dfr_seq; /* seqno for deferred ACK */
struct rxrpc_ackpacket ackr; /* pending normal ACK packet */
uint8_t ackr_array[RXRPC_CALL_ACK_WINDOW_SIZE]; /* ACK records */
/* presentation layer */
char app_last_rcv; /* T if received last packet from remote end */
enum rxrpc_app_cstate app_call_state; /* call state */
enum rxrpc_app_estate app_err_state; /* abort/error state */
struct list_head app_readyq; /* ordered ready received packet queue */
struct list_head app_unreadyq; /* ordered post-hole recv'd packet queue */
rxrpc_seq_t app_ready_seq; /* last seq number dropped into readyq */
size_t app_ready_qty; /* amount of data ready in readyq */
unsigned app_opcode; /* operation ID */
unsigned app_abort_code; /* abort code (when aborted) */
int app_errno; /* error number (when ICMP error received) */
/* statisics */
unsigned pkt_rcv_count; /* count of received packets on this call */
unsigned pkt_snd_count; /* count of sent packets on this call */
unsigned app_read_count; /* number of reads issued */
/* bits for the application to use */
rxrpc_call_attn_func_t app_attn_func; /* callback when attention required */
rxrpc_call_error_func_t app_error_func; /* callback when abort sent (cleanup and put) */
rxrpc_call_aemap_func_t app_aemap_func; /* callback to map abort code to/from errno */
void *app_user; /* application data */
struct list_head app_link; /* application list linkage */
struct list_head app_attn_link; /* application attention list linkage */
size_t app_mark; /* trigger callback when app_ready_qty>=app_mark */
char app_async_read; /* T if in async-read mode */
uint8_t *app_read_buf; /* application async read buffer (app_mark size) */
uint8_t *app_scr_alloc; /* application scratch allocation pointer */
void *app_scr_ptr; /* application pointer into scratch buffer */
#define RXRPC_APP_MARK_EOF 0xFFFFFFFFU /* mark at end of input */
/* application scratch buffer */
uint8_t app_scratch[0] __attribute__((aligned(sizeof(long))));
};
#define RXRPC_CALL_SCRATCH_SIZE (PAGE_SIZE - sizeof(struct rxrpc_call))
#define rxrpc_call_reset_scratch(CALL) \
do { (CALL)->app_scr_alloc = (CALL)->app_scratch; } while(0)
#define rxrpc_call_alloc_scratch(CALL,SIZE) \
({ \
void *ptr; \
ptr = (CALL)->app_scr_alloc; \
(CALL)->app_scr_alloc += (SIZE); \
if ((SIZE)>RXRPC_CALL_SCRATCH_SIZE || \
(size_t)((CALL)->app_scr_alloc - (u8*)(CALL)) > RXRPC_CALL_SCRATCH_SIZE) { \
printk("rxrpc_call_alloc_scratch(%p,%Zu)\n",(CALL),(size_t)(SIZE)); \
BUG(); \
} \
ptr; \
})
#define rxrpc_call_alloc_scratch_s(CALL,TYPE) \
({ \
size_t size = sizeof(TYPE); \
TYPE *ptr; \
ptr = (TYPE*)(CALL)->app_scr_alloc; \
(CALL)->app_scr_alloc += size; \
if (size>RXRPC_CALL_SCRATCH_SIZE || \
(size_t)((CALL)->app_scr_alloc - (u8*)(CALL)) > RXRPC_CALL_SCRATCH_SIZE) { \
printk("rxrpc_call_alloc_scratch(%p,%Zu)\n",(CALL),size); \
BUG(); \
} \
ptr; \
})
#define rxrpc_call_is_ack_pending(CALL) ((CALL)->ackr.reason != 0)
extern int rxrpc_create_call(struct rxrpc_connection *conn,
rxrpc_call_attn_func_t attn,
rxrpc_call_error_func_t error,
rxrpc_call_aemap_func_t aemap,
struct rxrpc_call **_call);
extern int rxrpc_incoming_call(struct rxrpc_connection *conn,
struct rxrpc_message *msg,
struct rxrpc_call **_call);
static inline void rxrpc_get_call(struct rxrpc_call *call)
{
BUG_ON(atomic_read(&call->usage)<=0);
atomic_inc(&call->usage);
/*printk("rxrpc_get_call(%p{u=%d})\n",(C),atomic_read(&(C)->usage));*/
}
extern void rxrpc_put_call(struct rxrpc_call *call);
extern void rxrpc_call_do_stuff(struct rxrpc_call *call);
extern int rxrpc_call_abort(struct rxrpc_call *call, int error);
#define RXRPC_CALL_READ_BLOCK 0x0001 /* block if not enough data and not yet EOF */
#define RXRPC_CALL_READ_ALL 0x0002 /* error if insufficient data received */
extern int rxrpc_call_read_data(struct rxrpc_call *call, void *buffer, size_t size, int flags);
extern int rxrpc_call_write_data(struct rxrpc_call *call,
size_t sioc,
struct kvec *siov,
uint8_t rxhdr_flags,
gfp_t alloc_flags,
int dup_data,
size_t *size_sent);
extern void rxrpc_call_handle_error(struct rxrpc_call *conn, int local, int errno);
#endif /* _LINUX_RXRPC_CALL_H */
include/rxrpc/connection.h deleted 100644 → 0
View file @ 08e0e7c8
/* connection.h: Rx connection record
*
* Copyright (C) 2002 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.
*/
#ifndef _LINUX_RXRPC_CONNECTION_H
#define _LINUX_RXRPC_CONNECTION_H
#include <rxrpc/types.h>
#include <rxrpc/krxtimod.h>
struct sk_buff;
/*****************************************************************************/
/*
* Rx connection
* - connections are matched by (rmt_port,rmt_addr,service_id,conn_id,clientflag)
* - connections only retain a refcount on the peer when they are active
* - connections with refcount==0 are inactive and reside in the peer's graveyard
*/
struct rxrpc_connection
{
atomic_t usage;
struct rxrpc_transport *trans; /* transport endpoint */
struct rxrpc_peer *peer; /* peer from/to which connected */
struct rxrpc_service *service; /* responsible service (inbound conns) */
struct rxrpc_timer timeout; /* decaching timer */
struct list_head link; /* link in peer's list */
struct list_head proc_link; /* link in proc list */
struct list_head err_link; /* link in ICMP error processing list */
struct list_head id_link; /* link in ID grant list */
struct sockaddr_in addr; /* remote address */
struct rxrpc_call *channels[4]; /* channels (active calls) */
wait_queue_head_t chanwait; /* wait for channel to become available */
spinlock_t lock; /* access lock */
struct timeval atime; /* last access time */
size_t mtu_size; /* MTU size for outbound messages */
unsigned call_counter; /* call ID counter */
rxrpc_serial_t serial_counter; /* packet serial number counter */
/* the following should all be in net order */
__be32 in_epoch; /* peer's epoch */
__be32 out_epoch; /* my epoch */
__be32 conn_id; /* connection ID, appropriately shifted */
__be16 service_id; /* service ID */
uint8_t security_ix; /* security ID */
uint8_t in_clientflag; /* RXRPC_CLIENT_INITIATED if we are server */
uint8_t out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
};
extern int rxrpc_create_connection(struct rxrpc_transport *trans,
__be16 port,
__be32 addr,
uint16_t service_id,
void *security,
struct rxrpc_connection **_conn);
extern int rxrpc_connection_lookup(struct rxrpc_peer *peer,
struct rxrpc_message *msg,
struct rxrpc_connection **_conn);
static inline void rxrpc_get_connection(struct rxrpc_connection *conn)
{
BUG_ON(atomic_read(&conn->usage)<0);
atomic_inc(&conn->usage);
//printk("rxrpc_get_conn(%p{u=%d})\n",conn,atomic_read(&conn->usage));
}
extern void rxrpc_put_connection(struct rxrpc_connection *conn);
extern int rxrpc_conn_receive_call_packet(struct rxrpc_connection *conn,
struct rxrpc_call *call,
struct rxrpc_message *msg);
extern void rxrpc_conn_handle_error(struct rxrpc_connection *conn, int local, int errno);
#endif /* _LINUX_RXRPC_CONNECTION_H */
include/rxrpc/krxiod.h deleted 100644 → 0
View file @ 08e0e7c8
/* krxiod.h: Rx RPC I/O kernel thread interface
*
* Copyright (C) 2002 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.
*/
#ifndef _LINUX_RXRPC_KRXIOD_H
#define _LINUX_RXRPC_KRXIOD_H
#include <rxrpc/types.h>
extern int rxrpc_krxiod_init(void);
extern void rxrpc_krxiod_kill(void);
extern void rxrpc_krxiod_queue_transport(struct rxrpc_transport *trans);
extern void rxrpc_krxiod_dequeue_transport(struct rxrpc_transport *trans);
extern void rxrpc_krxiod_queue_peer(struct rxrpc_peer *peer);
extern void rxrpc_krxiod_dequeue_peer(struct rxrpc_peer *peer);
extern void rxrpc_krxiod_clear_peers(struct rxrpc_transport *trans);
extern void rxrpc_krxiod_queue_call(struct rxrpc_call *call);
extern void rxrpc_krxiod_dequeue_call(struct rxrpc_call *call);
#endif /* _LINUX_RXRPC_KRXIOD_H */
include/rxrpc/krxsecd.h deleted 100644 → 0
View file @ 08e0e7c8
/* krxsecd.h: Rx RPC security kernel thread interface
*
* Copyright (C) 2002 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.
*/
#ifndef _LINUX_RXRPC_KRXSECD_H
#define _LINUX_RXRPC_KRXSECD_H
#include <rxrpc/types.h>
extern int rxrpc_krxsecd_init(void);
extern void rxrpc_krxsecd_kill(void);
extern void rxrpc_krxsecd_clear_transport(struct rxrpc_transport *trans);
extern void rxrpc_krxsecd_queue_incoming_call(struct rxrpc_message *msg);
#endif /* _LINUX_RXRPC_KRXSECD_H */
include/rxrpc/krxtimod.h deleted 100644 → 0
View file @ 08e0e7c8
/* krxtimod.h: RxRPC timeout daemon
*
* Copyright (C) 2002 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.
*/
#ifndef _LINUX_RXRPC_KRXTIMOD_H
#define _LINUX_RXRPC_KRXTIMOD_H
#include <rxrpc/types.h>
struct rxrpc_timer_ops {
/* called when the front of the timer queue has timed out */
void (*timed_out)(struct rxrpc_timer *timer);
};
/*****************************************************************************/
/*
* RXRPC timer/timeout record
*/
struct rxrpc_timer
{
struct list_head link; /* link in timer queue */
unsigned long timo_jif; /* timeout time */
const struct rxrpc_timer_ops *ops; /* timeout expiry function */
};
static inline void rxrpc_timer_init(rxrpc_timer_t *timer, const struct rxrpc_timer_ops *ops)
{
INIT_LIST_HEAD(&timer->link);
timer->ops = ops;
}
extern int rxrpc_krxtimod_start(void);
extern void rxrpc_krxtimod_kill(void);
extern void rxrpc_krxtimod_add_timer(rxrpc_timer_t *timer, unsigned long timeout);
extern int rxrpc_krxtimod_del_timer(rxrpc_timer_t *timer);
#endif /* _LINUX_RXRPC_KRXTIMOD_H */
include/rxrpc/message.h deleted 100644 → 0
View file @ 08e0e7c8
/* message.h: Rx message caching
*
* Copyright (C) 2002 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.
*/
#ifndef _LINUX_RXRPC_MESSAGE_H
#define _LINUX_RXRPC_MESSAGE_H
#include <rxrpc/packet.h>
/*****************************************************************************/
/*
* Rx message record
*/
struct rxrpc_message
{
atomic_t usage;
struct list_head link; /* list link */
struct timeval stamp; /* time received or last sent */
rxrpc_seq_t seq; /* message sequence number */
int state; /* the state the message is currently in */
#define RXRPC_MSG_PREPARED 0
#define RXRPC_MSG_SENT 1
#define RXRPC_MSG_ACKED 2 /* provisionally ACK'd */
#define RXRPC_MSG_DONE 3 /* definitively ACK'd (msg->seq<ack.firstPacket) */
#define RXRPC_MSG_RECEIVED 4
#define RXRPC_MSG_ERROR -1
char rttdone; /* used for RTT */
struct rxrpc_transport *trans; /* transport received through */
struct rxrpc_connection *conn; /* connection received over */
struct sk_buff *pkt; /* received packet */
off_t offset; /* offset into pkt of next byte of data */
struct rxrpc_header hdr; /* message header */
int dcount; /* data part count */
size_t dsize; /* data size */
#define RXRPC_MSG_MAX_IOCS 8
struct kvec data[RXRPC_MSG_MAX_IOCS]; /* message data */
unsigned long dfree; /* bit mask indicating kfree(data[x]) if T */
};
#define rxrpc_get_message(M) do { atomic_inc(&(M)->usage); } while(0)
extern void __rxrpc_put_message(struct rxrpc_message *msg);
static inline void rxrpc_put_message(struct rxrpc_message *msg)
{
BUG_ON(atomic_read(&msg->usage)<=0);
if (atomic_dec_and_test(&msg->usage))
__rxrpc_put_message(msg);
}
extern int rxrpc_conn_newmsg(struct rxrpc_connection *conn,
struct rxrpc_call *call,
uint8_t type,
int count,
struct kvec *diov,
gfp_t alloc_flags,
struct rxrpc_message **_msg);
extern int rxrpc_conn_sendmsg(struct rxrpc_connection *conn, struct rxrpc_message *msg);
#endif /* _LINUX_RXRPC_MESSAGE_H */
include/rxrpc/packet.h
View file @ 63b6be55
/* packet.h: Rx packet layout and definitions
*
* Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
* Copyright (C) 2002, 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
......@@ -12,21 +12,17 @@
#ifndef _LINUX_RXRPC_PACKET_H
#define _LINUX_RXRPC_PACKET_H
#include <rxrpc/types.h>
#define RXRPC_IPUDP_SIZE 28
extern size_t RXRPC_MAX_PACKET_SIZE;
#define RXRPC_MAX_PACKET_DATA_SIZE (RXRPC_MAX_PACKET_SIZE - sizeof(struct rxrpc_header))
#define RXRPC_LOCAL_PACKET_SIZE RXRPC_MAX_PACKET_SIZE
#define RXRPC_REMOTE_PACKET_SIZE (576 - RXRPC_IPUDP_SIZE)
typedef u32 rxrpc_seq_t; /* Rx message sequence number */
typedef u32 rxrpc_serial_t; /* Rx message serial number */
typedef __be32 rxrpc_seq_net_t; /* on-the-wire Rx message sequence number */
typedef __be32 rxrpc_serial_net_t; /* on-the-wire Rx message serial number */
/*****************************************************************************/
/*
* on-the-wire Rx packet header
* - all multibyte fields should be in network byte order
*/
struct rxrpc_header
{
struct rxrpc_header {
__be32 epoch; /* client boot timestamp */
__be32 cid; /* connection and channel ID */
......@@ -85,8 +81,7 @@ extern const char *rxrpc_pkts[];
* - new__rsvd = j__rsvd
* - duplicating all other fields
*/
struct rxrpc_jumbo_header
{
struct rxrpc_jumbo_header {
uint8_t flags; /* packet flags (as per rxrpc_header) */
uint8_t pad;
__be16 _rsvd; /* reserved (used by kerberos security as cksum) */
......@@ -99,8 +94,7 @@ struct rxrpc_jumbo_header
* on-the-wire Rx ACK packet data payload
* - all multibyte fields should be in network byte order
*/
struct rxrpc_ackpacket
{
struct rxrpc_ackpacket {
__be16 bufferSpace; /* number of packet buffers available */
__be16 maxSkew; /* diff between serno being ACK'd and highest serial no
* received */
......
include/rxrpc/peer.h deleted 100644 → 0
View file @ 08e0e7c8
/* peer.h: Rx RPC per-transport peer record
*
* Copyright (C) 2002 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.
*/
#ifndef _LINUX_RXRPC_PEER_H
#define _LINUX_RXRPC_PEER_H
#include <linux/wait.h>
#include <rxrpc/types.h>
#include <rxrpc/krxtimod.h>
struct rxrpc_peer_ops
{
/* peer record being added */
int (*adding)(struct rxrpc_peer *peer);
/* peer record being discarded from graveyard */
void (*discarding)(struct rxrpc_peer *peer);
/* change of epoch detected on connection */
void (*change_of_epoch)(struct rxrpc_connection *conn);
};
/*****************************************************************************/
/*
* Rx RPC per-transport peer record
* - peers only retain a refcount on the transport when they are active
* - peers with refcount==0 are inactive and reside in the transport's graveyard
*/
struct rxrpc_peer
{
atomic_t usage;
struct rxrpc_peer_ops *ops; /* operations on this peer */
struct rxrpc_transport *trans; /* owner transport */
struct rxrpc_timer timeout; /* timeout for grave destruction */
struct list_head link; /* link in transport's peer list */
struct list_head proc_link; /* link in /proc list */
rwlock_t conn_idlock; /* lock for connection IDs */
struct list_head conn_idlist; /* list of connections granted IDs */
uint32_t conn_idcounter; /* connection ID counter */
rwlock_t conn_lock; /* lock for active/dead connections */
struct list_head conn_active; /* active connections to/from this peer */
struct list_head conn_graveyard; /* graveyard for inactive connections */
spinlock_t conn_gylock; /* lock for conn_graveyard */
wait_queue_head_t conn_gy_waitq; /* wait queue hit when graveyard is empty */
atomic_t conn_count; /* number of attached connections */
struct in_addr addr; /* remote address */
size_t if_mtu; /* interface MTU for this peer */
spinlock_t lock; /* access lock */
void *user; /* application layer data */
/* calculated RTT cache */
#define RXRPC_RTT_CACHE_SIZE 32
suseconds_t rtt; /* current RTT estimate (in uS) */
unsigned rtt_point; /* next entry at which to insert */
unsigned rtt_usage; /* amount of cache actually used */
suseconds_t rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */
};
extern int rxrpc_peer_lookup(struct rxrpc_transport *trans,
__be32 addr,
struct rxrpc_peer **_peer);
static inline void rxrpc_get_peer(struct rxrpc_peer *peer)
{
BUG_ON(atomic_read(&peer->usage)<0);
atomic_inc(&peer->usage);
//printk("rxrpc_get_peer(%p{u=%d})\n",peer,atomic_read(&peer->usage));
}
extern void rxrpc_put_peer(struct rxrpc_peer *peer);
#endif /* _LINUX_RXRPC_PEER_H */
include/rxrpc/rxrpc.h deleted 100644 → 0
View file @ 08e0e7c8
/* rx.h: Rx RPC interface
*
* Copyright (C) 2002 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.
*/
#ifndef _LINUX_RXRPC_RXRPC_H
#define _LINUX_RXRPC_RXRPC_H
#ifdef __KERNEL__
extern __be32 rxrpc_epoch;
#ifdef CONFIG_SYSCTL
extern int rxrpc_ktrace;
extern int rxrpc_kdebug;
extern int rxrpc_kproto;
extern int rxrpc_knet;
#else
#define rxrpc_ktrace 0
#define rxrpc_kdebug 0
#define rxrpc_kproto 0
#define rxrpc_knet 0
#endif
extern int rxrpc_sysctl_init(void);
extern void rxrpc_sysctl_cleanup(void);
#endif /* __KERNEL__ */
#endif /* _LINUX_RXRPC_RXRPC_H */
include/rxrpc/transport.h deleted 100644 → 0
View file @ 08e0e7c8
/* transport.h: Rx transport management
*
* Copyright (C) 2002 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.
*/
#ifndef _LINUX_RXRPC_TRANSPORT_H
#define _LINUX_RXRPC_TRANSPORT_H
#include <rxrpc/types.h>
#include <rxrpc/krxiod.h>
#include <rxrpc/rxrpc.h>
#include <linux/skbuff.h>
#include <linux/rwsem.h>
typedef int (*rxrpc_newcall_fnx_t)(struct rxrpc_call *call);
extern wait_queue_head_t rxrpc_krxiod_wq;
/*****************************************************************************/
/*
* Rx operation specification
* - tables of these must be sorted by op ID so that they can be binary-chop searched
*/
struct rxrpc_operation
{
unsigned id; /* operation ID */
size_t asize; /* minimum size of argument block */
const char *name; /* name of operation */
void *user; /* initial user data */
};
/*****************************************************************************/
/*
* Rx transport service record
*/
struct rxrpc_service
{
struct list_head link; /* link in services list on transport */
struct module *owner; /* owner module */
rxrpc_newcall_fnx_t new_call; /* new call handler function */
const char *name; /* name of service */
unsigned short service_id; /* Rx service ID */
rxrpc_call_attn_func_t attn_func; /* call requires attention callback */
rxrpc_call_error_func_t error_func; /* call error callback */
rxrpc_call_aemap_func_t aemap_func; /* abort -> errno mapping callback */
const struct rxrpc_operation *ops_begin; /* beginning of operations table */
const struct rxrpc_operation *ops_end; /* end of operations table */
};
/*****************************************************************************/
/*
* Rx transport endpoint record
*/
struct rxrpc_transport
{
atomic_t usage;
struct socket *socket; /* my UDP socket */
struct list_head services; /* services listening on this socket */
struct list_head link; /* link in transport list */
struct list_head proc_link; /* link in transport proc list */
struct list_head krxiodq_link; /* krxiod attention queue link */
spinlock_t lock; /* access lock */
struct list_head peer_active; /* active peers connected to over this socket */
struct list_head peer_graveyard; /* inactive peer list */
spinlock_t peer_gylock; /* peer graveyard lock */
wait_queue_head_t peer_gy_waitq; /* wait queue hit when peer graveyard is empty */
rwlock_t peer_lock; /* peer list access lock */
atomic_t peer_count; /* number of peers */
struct rxrpc_peer_ops *peer_ops; /* default peer operations */
unsigned short port; /* port upon which listening */
volatile char error_rcvd; /* T if received ICMP error outstanding */
};
extern int rxrpc_create_transport(unsigned short port,
struct rxrpc_transport **_trans);
static inline void rxrpc_get_transport(struct rxrpc_transport *trans)
{
BUG_ON(atomic_read(&trans->usage) <= 0);
atomic_inc(&trans->usage);
//printk("rxrpc_get_transport(%p{u=%d})\n",
// trans, atomic_read(&trans->usage));
}
extern void rxrpc_put_transport(struct rxrpc_transport *trans);
extern int rxrpc_add_service(struct rxrpc_transport *trans,
struct rxrpc_service *srv);
extern void rxrpc_del_service(struct rxrpc_transport *trans,
struct rxrpc_service *srv);
extern void rxrpc_trans_receive_packet(struct rxrpc_transport *trans);
extern int rxrpc_trans_immediate_abort(struct rxrpc_transport *trans,
struct rxrpc_message *msg,
int error);
#endif /* _LINUX_RXRPC_TRANSPORT_H */
net/rxrpc/Makefile
View file @ 63b6be55
#
# Makefile for Linux kernel Rx RPC
# Makefile for Linux kernel RxRPC
#
#CFLAGS += -finstrument-functions
af-rxrpc-objs := \
af_rxrpc.o \
ar-accept.o \
......@@ -29,26 +27,3 @@ endif
obj-$(CONFIG_AF_RXRPC) += af-rxrpc.o
obj-$(CONFIG_RXKAD) += rxkad.o
#
# obsolete RxRPC interface, still used by fs/afs/
#
rxrpc-objs := \
call.o \
connection.o \
krxiod.o \
krxsecd.o \
krxtimod.o \
main.o \
peer.o \
rxrpc_syms.o \
transport.o
ifeq ($(CONFIG_PROC_FS),y)
rxrpc-objs += proc.o
endif
ifeq ($(CONFIG_SYSCTL),y)
rxrpc-objs += sysctl.o
endif
obj-$(CONFIG_RXRPC) += rxrpc.o
net/rxrpc/call.c deleted 100644 → 0
View file @ 08e0e7c8
/* call.c: Rx call routines
*
* Copyright (C) 2002 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/sched.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <rxrpc/rxrpc.h>
#include <rxrpc/transport.h>
#include <rxrpc/peer.h>
#include <rxrpc/connection.h>
#include <rxrpc/call.h>
#include <rxrpc/message.h>
#include "internal.h"
__RXACCT_DECL(atomic_t rxrpc_call_count);
__RXACCT_DECL(atomic_t rxrpc_message_count);
LIST_HEAD(rxrpc_calls);
DECLARE_RWSEM(rxrpc_calls_sem);
unsigned rxrpc_call_rcv_timeout = HZ/3;
static unsigned rxrpc_call_acks_timeout = HZ/3;
static unsigned rxrpc_call_dfr_ack_timeout = HZ/20;
static unsigned short rxrpc_call_max_resend = HZ/10;
const char *rxrpc_call_states[] = {
"COMPLETE",
"ERROR",
"SRVR_RCV_OPID",
"SRVR_RCV_ARGS",
"SRVR_GOT_ARGS",
"SRVR_SND_REPLY",
"SRVR_RCV_FINAL_ACK",
"CLNT_SND_ARGS",
"CLNT_RCV_REPLY",
"CLNT_GOT_REPLY"
};
const char *rxrpc_call_error_states[] = {
"NO_ERROR",
"LOCAL_ABORT",
"PEER_ABORT",
"LOCAL_ERROR",
"REMOTE_ERROR"
};
const char *rxrpc_pkts[] = {
"?00",
"data", "ack", "busy", "abort", "ackall", "chall", "resp", "debug",
"?09", "?10", "?11", "?12", "?13", "?14", "?15"
};
static const char *rxrpc_acks[] = {
"---", "REQ", "DUP", "SEQ", "WIN", "MEM", "PNG", "PNR", "DLY", "IDL",
"-?-"
};
static const char _acktype[] = "NA-";
static void rxrpc_call_receive_packet(struct rxrpc_call *call);
static void rxrpc_call_receive_data_packet(struct rxrpc_call *call,
struct rxrpc_message *msg);
static void rxrpc_call_receive_ack_packet(struct rxrpc_call *call,
struct rxrpc_message *msg);
static void rxrpc_call_definitively_ACK(struct rxrpc_call *call,
rxrpc_seq_t higest);
static void rxrpc_call_resend(struct rxrpc_call *call, rxrpc_seq_t highest);
static int __rxrpc_call_read_data(struct rxrpc_call *call);
static int rxrpc_call_record_ACK(struct rxrpc_call *call,
struct rxrpc_message *msg,
rxrpc_seq_t seq,
size_t count);
static int rxrpc_call_flush(struct rxrpc_call *call);
#define _state(call) \
_debug("[[[ state %s ]]]", rxrpc_call_states[call->app_call_state]);
static void rxrpc_call_default_attn_func(struct rxrpc_call *call)
{
wake_up(&call->waitq);
}
static void rxrpc_call_default_error_func(struct rxrpc_call *call)
{
wake_up(&call->waitq);
}
static void rxrpc_call_default_aemap_func(struct rxrpc_call *call)
{
switch (call->app_err_state) {
case RXRPC_ESTATE_LOCAL_ABORT:
call->app_abort_code = -call->app_errno;
case RXRPC_ESTATE_PEER_ABORT:
call->app_errno = -ECONNABORTED;
default:
break;
}
}
static void __rxrpc_call_acks_timeout(unsigned long _call)
{
struct rxrpc_call *call = (struct rxrpc_call *) _call;
_debug("ACKS TIMEOUT %05lu", jiffies - call->cjif);
call->flags |= RXRPC_CALL_ACKS_TIMO;
rxrpc_krxiod_queue_call(call);
}
static void __rxrpc_call_rcv_timeout(unsigned long _call)
{
struct rxrpc_call *call = (struct rxrpc_call *) _call;
_debug("RCV TIMEOUT %05lu", jiffies - call->cjif);
call->flags |= RXRPC_CALL_RCV_TIMO;
rxrpc_krxiod_queue_call(call);
}
static void __rxrpc_call_ackr_timeout(unsigned long _call)
{
struct rxrpc_call *call = (struct rxrpc_call *) _call;
_debug("ACKR TIMEOUT %05lu",jiffies - call->cjif);
call->flags |= RXRPC_CALL_ACKR_TIMO;
rxrpc_krxiod_queue_call(call);
}
/*****************************************************************************/
/*
* calculate a timeout based on an RTT value
*/
static inline unsigned long __rxrpc_rtt_based_timeout(struct rxrpc_call *call,
unsigned long val)
{
unsigned long expiry = call->conn->peer->rtt / (1000000 / HZ);
expiry += 10;
if (expiry < HZ / 25)
expiry = HZ / 25;
if (expiry > HZ)
expiry = HZ;
_leave(" = %lu jiffies", expiry);
return jiffies + expiry;
} /* end __rxrpc_rtt_based_timeout() */
/*****************************************************************************/
/*
* create a new call record
*/
static inline int __rxrpc_create_call(struct rxrpc_connection *conn,
struct rxrpc_call **_call)
{
struct rxrpc_call *call;
_enter("%p", conn);
/* allocate and initialise a call record */
call = (struct rxrpc_call *) get_zeroed_page(GFP_KERNEL);
if (!call) {
_leave(" ENOMEM");
return -ENOMEM;
}
atomic_set(&call->usage, 1);
init_waitqueue_head(&call->waitq);
spin_lock_init(&call->lock);
INIT_LIST_HEAD(&call->link);
INIT_LIST_HEAD(&call->acks_pendq);
INIT_LIST_HEAD(&call->rcv_receiveq);
INIT_LIST_HEAD(&call->rcv_krxiodq_lk);
INIT_LIST_HEAD(&call->app_readyq);
INIT_LIST_HEAD(&call->app_unreadyq);
INIT_LIST_HEAD(&call->app_link);
INIT_LIST_HEAD(&call->app_attn_link);
init_timer(&call->acks_timeout);
call->acks_timeout.data = (unsigned long) call;
call->acks_timeout.function = __rxrpc_call_acks_timeout;
init_timer(&call->rcv_timeout);
call->rcv_timeout.data = (unsigned long) call;
call->rcv_timeout.function = __rxrpc_call_rcv_timeout;
init_timer(&call->ackr_dfr_timo);
call->ackr_dfr_timo.data = (unsigned long) call;
call->ackr_dfr_timo.function = __rxrpc_call_ackr_timeout;
call->conn = conn;
call->ackr_win_bot = 1;
call->ackr_win_top = call->ackr_win_bot + RXRPC_CALL_ACK_WINDOW_SIZE - 1;
call->ackr_prev_seq = 0;
call->app_mark = RXRPC_APP_MARK_EOF;
call->app_attn_func = rxrpc_call_default_attn_func;
call->app_error_func = rxrpc_call_default_error_func;
call->app_aemap_func = rxrpc_call_default_aemap_func;
call->app_scr_alloc = call->app_scratch;
call->cjif = jiffies;
_leave(" = 0 (%p)", call);
*_call = call;
return 0;
} /* end __rxrpc_create_call() */
/*****************************************************************************/
/*
* create a new call record for outgoing calls
*/
int rxrpc_create_call(struct rxrpc_connection *conn,
rxrpc_call_attn_func_t attn,
rxrpc_call_error_func_t error,
rxrpc_call_aemap_func_t aemap,
struct rxrpc_call **_call)
{
DECLARE_WAITQUEUE(myself, current);
struct rxrpc_call *call;
int ret, cix, loop;
_enter("%p", conn);
/* allocate and initialise a call record */
ret = __rxrpc_create_call(conn, &call);
if (ret < 0) {
_leave(" = %d", ret);
return ret;
}
call->app_call_state = RXRPC_CSTATE_CLNT_SND_ARGS;
if (attn)
call->app_attn_func = attn;
if (error)
call->app_error_func = error;
if (aemap)
call->app_aemap_func = aemap;
_state(call);
spin_lock(&conn->lock);
set_current_state(TASK_INTERRUPTIBLE);
add_wait_queue(&conn->chanwait, &myself);
try_again:
/* try to find an unused channel */
for (cix = 0; cix < 4; cix++)
if (!conn->channels[cix])
goto obtained_chan;
/* no free channels - wait for one to become available */
ret = -EINTR;
if (signal_pending(current))
goto error_unwait;
spin_unlock(&conn->lock);
schedule();
set_current_state(TASK_INTERRUPTIBLE);
spin_lock(&conn->lock);
goto try_again;
/* got a channel - now attach to the connection */
obtained_chan:
remove_wait_queue(&conn->chanwait, &myself);
set_current_state(TASK_RUNNING);
/* concoct a unique call number */
next_callid:
call->call_id = htonl(++conn->call_counter);
for (loop = 0; loop < 4; loop++)
if (conn->channels[loop] &&
conn->channels[loop]->call_id == call->call_id)
goto next_callid;
rxrpc_get_connection(conn);
conn->channels[cix] = call; /* assign _after_ done callid check loop */
do_gettimeofday(&conn->atime);
call->chan_ix = htonl(cix);
spin_unlock(&conn->lock);
down_write(&rxrpc_calls_sem);
list_add_tail(&call->call_link, &rxrpc_calls);
up_write(&rxrpc_calls_sem);
__RXACCT(atomic_inc(&rxrpc_call_count));
*_call = call;
_leave(" = 0 (call=%p cix=%u)", call, cix);
return 0;
error_unwait:
remove_wait_queue(&conn->chanwait, &myself);
set_current_state(TASK_RUNNING);
spin_unlock(&conn->lock);
free_page((unsigned long) call);
_leave(" = %d", ret);
return ret;
} /* end rxrpc_create_call() */
/*****************************************************************************/
/*
* create a new call record for incoming calls
*/
int rxrpc_incoming_call(struct rxrpc_connection *conn,
struct rxrpc_message *msg,
struct rxrpc_call **_call)
{
struct rxrpc_call *call;
unsigned cix;
int ret;
cix = ntohl(msg->hdr.cid) & RXRPC_CHANNELMASK;
_enter("%p,%u,%u", conn, ntohl(msg->hdr.callNumber), cix);
/* allocate and initialise a call record */
ret = __rxrpc_create_call(conn, &call);
if (ret < 0) {
_leave(" = %d", ret);
return ret;
}
call->pkt_rcv_count = 1;
call->app_call_state = RXRPC_CSTATE_SRVR_RCV_OPID;
call->app_mark = sizeof(uint32_t);
_state(call);
/* attach to the connection */
ret = -EBUSY;
call->chan_ix = htonl(cix);
call->call_id = msg->hdr.callNumber;
spin_lock(&conn->lock);
if (!conn->channels[cix] ||
conn->channels[cix]->app_call_state == RXRPC_CSTATE_COMPLETE ||
conn->channels[cix]->app_call_state == RXRPC_CSTATE_ERROR
) {
conn->channels[cix] = call;
rxrpc_get_connection(conn);
ret = 0;
}
spin_unlock(&conn->lock);
if (ret < 0) {
free_page((unsigned long) call);
call = NULL;
}
if (ret == 0) {
down_write(&rxrpc_calls_sem);
list_add_tail(&call->call_link, &rxrpc_calls);
up_write(&rxrpc_calls_sem);
__RXACCT(atomic_inc(&rxrpc_call_count));
*_call = call;
}
_leave(" = %d [%p]", ret, call);
return ret;
} /* end rxrpc_incoming_call() */
/*****************************************************************************/
/*
* free a call record
*/
void rxrpc_put_call(struct rxrpc_call *call)
{
struct rxrpc_connection *conn = call->conn;
struct rxrpc_message *msg;
_enter("%p{u=%d}",call,atomic_read(&call->usage));
/* sanity check */
if (atomic_read(&call->usage) <= 0)
BUG();
/* to prevent a race, the decrement and the de-list must be effectively
* atomic */
spin_lock(&conn->lock);
if (likely(!atomic_dec_and_test(&call->usage))) {
spin_unlock(&conn->lock);
_leave("");
return;
}
if (conn->channels[ntohl(call->chan_ix)] == call)
conn->channels[ntohl(call->chan_ix)] = NULL;
spin_unlock(&conn->lock);
wake_up(&conn->chanwait);
rxrpc_put_connection(conn);
/* clear the timers and dequeue from krxiod */
del_timer_sync(&call->acks_timeout);
del_timer_sync(&call->rcv_timeout);
del_timer_sync(&call->ackr_dfr_timo);
rxrpc_krxiod_dequeue_call(call);
/* clean up the contents of the struct */
if (call->snd_nextmsg)
rxrpc_put_message(call->snd_nextmsg);
if (call->snd_ping)
rxrpc_put_message(call->snd_ping);
while (!list_empty(&call->acks_pendq)) {
msg = list_entry(call->acks_pendq.next,
struct rxrpc_message, link);
list_del(&msg->link);
rxrpc_put_message(msg);
}
while (!list_empty(&call->rcv_receiveq)) {
msg = list_entry(call->rcv_receiveq.next,
struct rxrpc_message, link);
list_del(&msg->link);
rxrpc_put_message(msg);
}
while (!list_empty(&call->app_readyq)) {
msg = list_entry(call->app_readyq.next,
struct rxrpc_message, link);
list_del(&msg->link);
rxrpc_put_message(msg);
}
while (!list_empty(&call->app_unreadyq)) {
msg = list_entry(call->app_unreadyq.next,
struct rxrpc_message, link);
list_del(&msg->link);
rxrpc_put_message(msg);
}
module_put(call->owner);
down_write(&rxrpc_calls_sem);
list_del(&call->call_link);
up_write(&rxrpc_calls_sem);
__RXACCT(atomic_dec(&rxrpc_call_count));
free_page((unsigned long) call);
_leave(" [destroyed]");
} /* end rxrpc_put_call() */
/*****************************************************************************/
/*
* actually generate a normal ACK
*/
static inline int __rxrpc_call_gen_normal_ACK(struct rxrpc_call *call,
rxrpc_seq_t seq)
{
struct rxrpc_message *msg;
struct kvec diov[3];
__be32 aux[4];
int delta, ret;
/* ACKs default to DELAY */
if (!call->ackr.reason)
call->ackr.reason = RXRPC_ACK_DELAY;
_proto("Rx %05lu Sending ACK { m=%hu f=#%u p=#%u s=%%%u r=%s n=%u }",
jiffies - call->cjif,
ntohs(call->ackr.maxSkew),
ntohl(call->ackr.firstPacket),
ntohl(call->ackr.previousPacket),
ntohl(call->ackr.serial),
rxrpc_acks[call->ackr.reason],
call->ackr.nAcks);
aux[0] = htonl(call->conn->peer->if_mtu); /* interface MTU */
aux[1] = htonl(1444); /* max MTU */
aux[2] = htonl(16); /* rwind */
aux[3] = htonl(4); /* max packets */
diov[0].iov_len = sizeof(struct rxrpc_ackpacket);
diov[0].iov_base = &call->ackr;
diov[1].iov_len = call->ackr_pend_cnt + 3;
diov[1].iov_base = call->ackr_array;
diov[2].iov_len = sizeof(aux);
diov[2].iov_base = &aux;
/* build and send the message */
ret = rxrpc_conn_newmsg(call->conn,call, RXRPC_PACKET_TYPE_ACK,
3, diov, GFP_KERNEL, &msg);
if (ret < 0)
goto out;
msg->seq = seq;
msg->hdr.seq = htonl(seq);
msg->hdr.flags |= RXRPC_SLOW_START_OK;
ret = rxrpc_conn_sendmsg(call->conn, msg);
rxrpc_put_message(msg);
if (ret < 0)
goto out;
call->pkt_snd_count++;
/* count how many actual ACKs there were at the front */
for (delta = 0; delta < call->ackr_pend_cnt; delta++)
if (call->ackr_array[delta] != RXRPC_ACK_TYPE_ACK)
break;
call->ackr_pend_cnt -= delta; /* all ACK'd to this point */
/* crank the ACK window around */
if (delta == 0) {
/* un-ACK'd window */
}
else if (delta < RXRPC_CALL_ACK_WINDOW_SIZE) {
/* partially ACK'd window
* - shuffle down to avoid losing out-of-sequence packets
*/
call->ackr_win_bot += delta;
call->ackr_win_top += delta;
memmove(&call->ackr_array[0],
&call->ackr_array[delta],
call->ackr_pend_cnt);
memset(&call->ackr_array[call->ackr_pend_cnt],
RXRPC_ACK_TYPE_NACK,
sizeof(call->ackr_array) - call->ackr_pend_cnt);
}
else {
/* fully ACK'd window
* - just clear the whole thing
*/
memset(&call->ackr_array,
RXRPC_ACK_TYPE_NACK,
sizeof(call->ackr_array));
}
/* clear this ACK */
memset(&call->ackr, 0, sizeof(call->ackr));
out:
if (!call->app_call_state)
printk("___ STATE 0 ___\n");
return ret;
} /* end __rxrpc_call_gen_normal_ACK() */
/*****************************************************************************/
/*
* note the reception of a packet in the call's ACK records and generate an
* appropriate ACK packet if necessary
* - returns 0 if packet should be processed, 1 if packet should be ignored
* and -ve on an error
*/
static int rxrpc_call_generate_ACK(struct rxrpc_call *call,
struct rxrpc_header *hdr,
struct rxrpc_ackpacket *ack)
{
struct rxrpc_message *msg;
rxrpc_seq_t seq;
unsigned offset;
int ret = 0, err;
u8 special_ACK, do_ACK, force;
_enter("%p,%p { seq=%d tp=%d fl=%02x }",
call, hdr, ntohl(hdr->seq), hdr->type, hdr->flags);
seq = ntohl(hdr->seq);
offset = seq - call->ackr_win_bot;
do_ACK = RXRPC_ACK_DELAY;
special_ACK = 0;
force = (seq == 1);
if (call->ackr_high_seq < seq)
call->ackr_high_seq = seq;
/* deal with generation of obvious special ACKs first */
if (ack && ack->reason == RXRPC_ACK_PING) {
special_ACK = RXRPC_ACK_PING_RESPONSE;
ret = 1;
goto gen_ACK;
}
if (seq < call->ackr_win_bot) {
special_ACK = RXRPC_ACK_DUPLICATE;
ret = 1;
goto gen_ACK;
}
if (seq >= call->ackr_win_top) {
special_ACK = RXRPC_ACK_EXCEEDS_WINDOW;
ret = 1;
goto gen_ACK;
}
if (call->ackr_array[offset] != RXRPC_ACK_TYPE_NACK) {
special_ACK = RXRPC_ACK_DUPLICATE;
ret = 1;
goto gen_ACK;
}
/* okay... it's a normal data packet inside the ACK window */
call->ackr_array[offset] = RXRPC_ACK_TYPE_ACK;
if (offset < call->ackr_pend_cnt) {
}
else if (offset > call->ackr_pend_cnt) {
do_ACK = RXRPC_ACK_OUT_OF_SEQUENCE;
call->ackr_pend_cnt = offset;
goto gen_ACK;
}
if (hdr->flags & RXRPC_REQUEST_ACK) {
do_ACK = RXRPC_ACK_REQUESTED;
}
/* generate an ACK on the final packet of a reply just received */
if (hdr->flags & RXRPC_LAST_PACKET) {
if (call->conn->out_clientflag)
force = 1;
}
else if (!(hdr->flags & RXRPC_MORE_PACKETS)) {
do_ACK = RXRPC_ACK_REQUESTED;
}
/* re-ACK packets previously received out-of-order */
for (offset++; offset < RXRPC_CALL_ACK_WINDOW_SIZE; offset++)
if (call->ackr_array[offset] != RXRPC_ACK_TYPE_ACK)
break;
call->ackr_pend_cnt = offset;
/* generate an ACK if we fill up the window */
if (call->ackr_pend_cnt >= RXRPC_CALL_ACK_WINDOW_SIZE)
force = 1;
gen_ACK:
_debug("%05lu ACKs pend=%u norm=%s special=%s%s",
jiffies - call->cjif,
call->ackr_pend_cnt,
rxrpc_acks[do_ACK],
rxrpc_acks[special_ACK],
force ? " immediate" :
do_ACK == RXRPC_ACK_REQUESTED ? " merge-req" :
hdr->flags & RXRPC_LAST_PACKET ? " finalise" :
" defer"
);
/* send any pending normal ACKs if need be */
if (call->ackr_pend_cnt > 0) {
/* fill out the appropriate form */
call->ackr.bufferSpace = htons(RXRPC_CALL_ACK_WINDOW_SIZE);
call->ackr.maxSkew = htons(min(call->ackr_high_seq - seq,
65535U));
call->ackr.firstPacket = htonl(call->ackr_win_bot);
call->ackr.previousPacket = call->ackr_prev_seq;
call->ackr.serial = hdr->serial;
call->ackr.nAcks = call->ackr_pend_cnt;
if (do_ACK == RXRPC_ACK_REQUESTED)
call->ackr.reason = do_ACK;
/* generate the ACK immediately if necessary */
if (special_ACK || force) {
err = __rxrpc_call_gen_normal_ACK(
call, do_ACK == RXRPC_ACK_DELAY ? 0 : seq);
if (err < 0) {
ret = err;
goto out;
}
}
}
if (call->ackr.reason == RXRPC_ACK_REQUESTED)
call->ackr_dfr_seq = seq;
/* start the ACK timer if not running if there are any pending deferred
* ACKs */
if (call->ackr_pend_cnt > 0 &&
call->ackr.reason != RXRPC_ACK_REQUESTED &&
!timer_pending(&call->ackr_dfr_timo)
) {
unsigned long timo;
timo = rxrpc_call_dfr_ack_timeout + jiffies;
_debug("START ACKR TIMER for cj=%lu", timo - call->cjif);
spin_lock(&call->lock);
mod_timer(&call->ackr_dfr_timo, timo);
spin_unlock(&call->lock);
}
else if ((call->ackr_pend_cnt == 0 ||
call->ackr.reason == RXRPC_ACK_REQUESTED) &&
timer_pending(&call->ackr_dfr_timo)
) {
/* stop timer if no pending ACKs */
_debug("CLEAR ACKR TIMER");
del_timer_sync(&call->ackr_dfr_timo);
}
/* send a special ACK if one is required */
if (special_ACK) {
struct rxrpc_ackpacket ack;
struct kvec diov[2];
uint8_t acks[1] = { RXRPC_ACK_TYPE_ACK };
/* fill out the appropriate form */
ack.bufferSpace = htons(RXRPC_CALL_ACK_WINDOW_SIZE);
ack.maxSkew = htons(min(call->ackr_high_seq - seq,
65535U));
ack.firstPacket = htonl(call->ackr_win_bot);
ack.previousPacket = call->ackr_prev_seq;
ack.serial = hdr->serial;
ack.reason = special_ACK;
ack.nAcks = 0;
_proto("Rx Sending s-ACK"
" { m=%hu f=#%u p=#%u s=%%%u r=%s n=%u }",
ntohs(ack.maxSkew),
ntohl(ack.firstPacket),
ntohl(ack.previousPacket),
ntohl(ack.serial),
rxrpc_acks[ack.reason],
ack.nAcks);
diov[0].iov_len = sizeof(struct rxrpc_ackpacket);
diov[0].iov_base = &ack;
diov[1].iov_len = sizeof(acks);
diov[1].iov_base = acks;
/* build and send the message */
err = rxrpc_conn_newmsg(call->conn,call, RXRPC_PACKET_TYPE_ACK,
hdr->seq ? 2 : 1, diov,
GFP_KERNEL,
&msg);
if (err < 0) {
ret = err;
goto out;
}
msg->seq = seq;
msg->hdr.seq = htonl(seq);
msg->hdr.flags |= RXRPC_SLOW_START_OK;
err = rxrpc_conn_sendmsg(call->conn, msg);
rxrpc_put_message(msg);
if (err < 0) {
ret = err;
goto out;
}
call->pkt_snd_count++;
}
out:
if (hdr->seq)
call->ackr_prev_seq = hdr->seq;
_leave(" = %d", ret);
return ret;
} /* end rxrpc_call_generate_ACK() */
/*****************************************************************************/
/*
* handle work to be done on a call
* - includes packet reception and timeout processing
*/
void rxrpc_call_do_stuff(struct rxrpc_call *call)
{
_enter("%p{flags=%lx}", call, call->flags);
/* handle packet reception */
if (call->flags & RXRPC_CALL_RCV_PKT) {
_debug("- receive packet");
call->flags &= ~RXRPC_CALL_RCV_PKT;
rxrpc_call_receive_packet(call);
}
/* handle overdue ACKs */
if (call->flags & RXRPC_CALL_ACKS_TIMO) {
_debug("- overdue ACK timeout");
call->flags &= ~RXRPC_CALL_ACKS_TIMO;
rxrpc_call_resend(call, call->snd_seq_count);
}
/* handle lack of reception */
if (call->flags & RXRPC_CALL_RCV_TIMO) {
_debug("- reception timeout");
call->flags &= ~RXRPC_CALL_RCV_TIMO;
rxrpc_call_abort(call, -EIO);
}
/* handle deferred ACKs */
if (call->flags & RXRPC_CALL_ACKR_TIMO ||
(call->ackr.nAcks > 0 && call->ackr.reason == RXRPC_ACK_REQUESTED)
) {
_debug("- deferred ACK timeout: cj=%05lu r=%s n=%u",
jiffies - call->cjif,
rxrpc_acks[call->ackr.reason],
call->ackr.nAcks);
call->flags &= ~RXRPC_CALL_ACKR_TIMO;
if (call->ackr.nAcks > 0 &&
call->app_call_state != RXRPC_CSTATE_ERROR) {
/* generate ACK */
__rxrpc_call_gen_normal_ACK(call, call->ackr_dfr_seq);
call->ackr_dfr_seq = 0;
}
}
_leave("");
} /* end rxrpc_call_do_stuff() */
/*****************************************************************************/
/*
* send an abort message at call or connection level
* - must be called with call->lock held
* - the supplied error code is sent as the packet data
*/
static int __rxrpc_call_abort(struct rxrpc_call *call, int errno)
{
struct rxrpc_connection *conn = call->conn;
struct rxrpc_message *msg;
struct kvec diov[1];
int ret;
__be32 _error;
_enter("%p{%08x},%p{%d},%d",
conn, ntohl(conn->conn_id), call, ntohl(call->call_id), errno);
/* if this call is already aborted, then just wake up any waiters */
if (call->app_call_state == RXRPC_CSTATE_ERROR) {
spin_unlock(&call->lock);
call->app_error_func(call);
_leave(" = 0");
return 0;
}
rxrpc_get_call(call);
/* change the state _with_ the lock still held */
call->app_call_state = RXRPC_CSTATE_ERROR;
call->app_err_state = RXRPC_ESTATE_LOCAL_ABORT;
call->app_errno = errno;
call->app_mark = RXRPC_APP_MARK_EOF;
call->app_read_buf = NULL;
call->app_async_read = 0;
_state(call);
/* ask the app to translate the error code */
call->app_aemap_func(call);
spin_unlock(&call->lock);
/* flush any outstanding ACKs */
del_timer_sync(&call->acks_timeout);
del_timer_sync(&call->rcv_timeout);
del_timer_sync(&call->ackr_dfr_timo);
if (rxrpc_call_is_ack_pending(call))
__rxrpc_call_gen_normal_ACK(call, 0);
/* send the abort packet only if we actually traded some other
* packets */
ret = 0;
if (call->pkt_snd_count || call->pkt_rcv_count) {
/* actually send the abort */
_proto("Rx Sending Call ABORT { data=%d }",
call->app_abort_code);
_error = htonl(call->app_abort_code);
diov[0].iov_len = sizeof(_error);
diov[0].iov_base = &_error;
ret = rxrpc_conn_newmsg(conn, call, RXRPC_PACKET_TYPE_ABORT,
1, diov, GFP_KERNEL, &msg);
if (ret == 0) {
ret = rxrpc_conn_sendmsg(conn, msg);
rxrpc_put_message(msg);
}
}
/* tell the app layer to let go */
call->app_error_func(call);
rxrpc_put_call(call);
_leave(" = %d", ret);
return ret;
} /* end __rxrpc_call_abort() */
/*****************************************************************************/
/*
* send an abort message at call or connection level
* - the supplied error code is sent as the packet data
*/
int rxrpc_call_abort(struct rxrpc_call *call, int error)
{
spin_lock(&call->lock);
return __rxrpc_call_abort(call, error);
} /* end rxrpc_call_abort() */
/*****************************************************************************/
/*
* process packets waiting for this call
*/
static void rxrpc_call_receive_packet(struct rxrpc_call *call)
{
struct rxrpc_message *msg;
struct list_head *_p;
_enter("%p", call);
rxrpc_get_call(call); /* must not go away too soon if aborted by
* app-layer */
while (!list_empty(&call->rcv_receiveq)) {
/* try to get next packet */
_p = NULL;
spin_lock(&call->lock);
if (!list_empty(&call->rcv_receiveq)) {
_p = call->rcv_receiveq.next;
list_del_init(_p);
}
spin_unlock(&call->lock);
if (!_p)
break;
msg = list_entry(_p, struct rxrpc_message, link);
_proto("Rx %05lu Received %s packet (%%%u,#%u,%c%c%c%c%c)",
jiffies - call->cjif,
rxrpc_pkts[msg->hdr.type],
ntohl(msg->hdr.serial),
msg->seq,
msg->hdr.flags & RXRPC_JUMBO_PACKET ? 'j' : '-',
msg->hdr.flags & RXRPC_MORE_PACKETS ? 'm' : '-',
msg->hdr.flags & RXRPC_LAST_PACKET ? 'l' : '-',
msg->hdr.flags & RXRPC_REQUEST_ACK ? 'r' : '-',
msg->hdr.flags & RXRPC_CLIENT_INITIATED ? 'C' : 'S'
);
switch (msg->hdr.type) {
/* deal with data packets */
case RXRPC_PACKET_TYPE_DATA:
/* ACK the packet if necessary */
switch (rxrpc_call_generate_ACK(call, &msg->hdr,
NULL)) {
case 0: /* useful packet */
rxrpc_call_receive_data_packet(call, msg);
break;
case 1: /* duplicate or out-of-window packet */
break;
default:
rxrpc_put_message(msg);
goto out;
}
break;
/* deal with ACK packets */
case RXRPC_PACKET_TYPE_ACK:
rxrpc_call_receive_ack_packet(call, msg);
break;
/* deal with abort packets */
case RXRPC_PACKET_TYPE_ABORT: {
__be32 _dbuf, *dp;
dp = skb_header_pointer(msg->pkt, msg->offset,
sizeof(_dbuf), &_dbuf);
if (dp == NULL)
printk("Rx Received short ABORT packet\n");
_proto("Rx Received Call ABORT { data=%d }",
(dp ? ntohl(*dp) : 0));
spin_lock(&call->lock);
call->app_call_state = RXRPC_CSTATE_ERROR;
call->app_err_state = RXRPC_ESTATE_PEER_ABORT;
call->app_abort_code = (dp ? ntohl(*dp) : 0);
call->app_errno = -ECONNABORTED;
call->app_mark = RXRPC_APP_MARK_EOF;
call->app_read_buf = NULL;
call->app_async_read = 0;
/* ask the app to translate the error code */
call->app_aemap_func(call);
_state(call);
spin_unlock(&call->lock);
call->app_error_func(call);
break;
}
default:
/* deal with other packet types */
_proto("Rx Unsupported packet type %u (#%u)",
msg->hdr.type, msg->seq);
break;
}
rxrpc_put_message(msg);
}
out:
rxrpc_put_call(call);
_leave("");
} /* end rxrpc_call_receive_packet() */
/*****************************************************************************/
/*
* process next data packet
* - as the next data packet arrives:
* - it is queued on app_readyq _if_ it is the next one expected
* (app_ready_seq+1)
* - it is queued on app_unreadyq _if_ it is not the next one expected
* - if a packet placed on app_readyq completely fills a hole leading up to
* the first packet on app_unreadyq, then packets now in sequence are
* tranferred to app_readyq
* - the application layer can only see packets on app_readyq
* (app_ready_qty bytes)
* - the application layer is prodded every time a new packet arrives
*/
static void rxrpc_call_receive_data_packet(struct rxrpc_call *call,
struct rxrpc_message *msg)
{
const struct rxrpc_operation *optbl, *op;
struct rxrpc_message *pmsg;
struct list_head *_p;
int ret, lo, hi, rmtimo;
__be32 opid;
_enter("%p{%u},%p{%u}", call, ntohl(call->call_id), msg, msg->seq);
rxrpc_get_message(msg);
/* add to the unready queue if we'd have to create a hole in the ready
* queue otherwise */
if (msg->seq != call->app_ready_seq + 1) {
_debug("Call add packet %d to unreadyq", msg->seq);
/* insert in seq order */
list_for_each(_p, &call->app_unreadyq) {
pmsg = list_entry(_p, struct rxrpc_message, link);
if (pmsg->seq > msg->seq)
break;
}
list_add_tail(&msg->link, _p);
_leave(" [unreadyq]");
return;
}
/* next in sequence - simply append into the call's ready queue */
_debug("Call add packet %d to readyq (+%Zd => %Zd bytes)",
msg->seq, msg->dsize, call->app_ready_qty);
spin_lock(&call->lock);
call->app_ready_seq = msg->seq;
call->app_ready_qty += msg->dsize;
list_add_tail(&msg->link, &call->app_readyq);
/* move unready packets to the readyq if we got rid of a hole */
while (!list_empty(&call->app_unreadyq)) {
pmsg = list_entry(call->app_unreadyq.next,
struct rxrpc_message, link);
if (pmsg->seq != call->app_ready_seq + 1)
break;
/* next in sequence - just move list-to-list */
_debug("Call transfer packet %d to readyq (+%Zd => %Zd bytes)",
pmsg->seq, pmsg->dsize, call->app_ready_qty);
call->app_ready_seq = pmsg->seq;
call->app_ready_qty += pmsg->dsize;
list_move_tail(&pmsg->link, &call->app_readyq);
}
/* see if we've got the last packet yet */
if (!list_empty(&call->app_readyq)) {
pmsg = list_entry(call->app_readyq.prev,
struct rxrpc_message, link);
if (pmsg->hdr.flags & RXRPC_LAST_PACKET) {
call->app_last_rcv = 1;
_debug("Last packet on readyq");
}
}
switch (call->app_call_state) {
/* do nothing if call already aborted */
case RXRPC_CSTATE_ERROR:
spin_unlock(&call->lock);
_leave(" [error]");
return;
/* extract the operation ID from an incoming call if that's not
* yet been done */
case RXRPC_CSTATE_SRVR_RCV_OPID:
spin_unlock(&call->lock);
/* handle as yet insufficient data for the operation ID */
if (call->app_ready_qty < 4) {
if (call->app_last_rcv)
/* trouble - last packet seen */
rxrpc_call_abort(call, -EINVAL);
_leave("");
return;
}
/* pull the operation ID out of the buffer */
ret = rxrpc_call_read_data(call, &opid, sizeof(opid), 0);
if (ret < 0) {
printk("Unexpected error from read-data: %d\n", ret);
if (call->app_call_state != RXRPC_CSTATE_ERROR)
rxrpc_call_abort(call, ret);
_leave("");
return;
}
call->app_opcode = ntohl(opid);
/* locate the operation in the available ops table */
optbl = call->conn->service->ops_begin;
lo = 0;
hi = call->conn->service->ops_end - optbl;
while (lo < hi) {
int mid = (hi + lo) / 2;
op = &optbl[mid];
if (call->app_opcode == op->id)
goto found_op;
if (call->app_opcode > op->id)
lo = mid + 1;
else
hi = mid;
}
/* search failed */
kproto("Rx Client requested operation %d from %s service",
call->app_opcode, call->conn->service->name);
rxrpc_call_abort(call, -EINVAL);
_leave(" [inval]");
return;
found_op:
_proto("Rx Client requested operation %s from %s service",
op->name, call->conn->service->name);
/* we're now waiting for the argument block (unless the call
* was aborted) */
spin_lock(&call->lock);
if (call->app_call_state == RXRPC_CSTATE_SRVR_RCV_OPID ||
call->app_call_state == RXRPC_CSTATE_SRVR_SND_REPLY) {
if (!call->app_last_rcv)
call->app_call_state =
RXRPC_CSTATE_SRVR_RCV_ARGS;
else if (call->app_ready_qty > 0)
call->app_call_state =
RXRPC_CSTATE_SRVR_GOT_ARGS;
else
call->app_call_state =
RXRPC_CSTATE_SRVR_SND_REPLY;
call->app_mark = op->asize;
call->app_user = op->user;
}
spin_unlock(&call->lock);
_state(call);
break;
case RXRPC_CSTATE_SRVR_RCV_ARGS:
/* change state if just received last packet of arg block */
if (call->app_last_rcv)
call->app_call_state = RXRPC_CSTATE_SRVR_GOT_ARGS;
spin_unlock(&call->lock);
_state(call);
break;
case RXRPC_CSTATE_CLNT_RCV_REPLY:
/* change state if just received last packet of reply block */
rmtimo = 0;
if (call->app_last_rcv) {
call->app_call_state = RXRPC_CSTATE_CLNT_GOT_REPLY;
rmtimo = 1;
}
spin_unlock(&call->lock);
if (rmtimo) {
del_timer_sync(&call->acks_timeout);
del_timer_sync(&call->rcv_timeout);
del_timer_sync(&call->ackr_dfr_timo);
}
_state(call);
break;
default:
/* deal with data reception in an unexpected state */
printk("Unexpected state [[[ %u ]]]\n", call->app_call_state);
__rxrpc_call_abort(call, -EBADMSG);
_leave("");
return;
}
if (call->app_call_state == RXRPC_CSTATE_CLNT_RCV_REPLY &&
call->app_last_rcv)
BUG();
/* otherwise just invoke the data function whenever we can satisfy its desire for more
* data
*/
_proto("Rx Received Op Data: st=%u qty=%Zu mk=%Zu%s",
call->app_call_state, call->app_ready_qty, call->app_mark,
call->app_last_rcv ? " last-rcvd" : "");
spin_lock(&call->lock);
ret = __rxrpc_call_read_data(call);
switch (ret) {
case 0:
spin_unlock(&call->lock);
call->app_attn_func(call);
break;
case -EAGAIN:
spin_unlock(&call->lock);
break;
case -ECONNABORTED:
spin_unlock(&call->lock);
break;
default:
__rxrpc_call_abort(call, ret);
break;
}
_state(call);
_leave("");
} /* end rxrpc_call_receive_data_packet() */
/*****************************************************************************/
/*
* received an ACK packet
*/
static void rxrpc_call_receive_ack_packet(struct rxrpc_call *call,
struct rxrpc_message *msg)
{
struct rxrpc_ackpacket _ack, *ap;
rxrpc_serial_net_t serial;
rxrpc_seq_t seq;
int ret;
_enter("%p{%u},%p{%u}", call, ntohl(call->call_id), msg, msg->seq);
/* extract the basic ACK record */
ap = skb_header_pointer(msg->pkt, msg->offset, sizeof(_ack), &_ack);
if (ap == NULL) {
printk("Rx Received short ACK packet\n");
return;
}
msg->offset += sizeof(_ack);
serial = ap->serial;
seq = ntohl(ap->firstPacket);
_proto("Rx Received ACK %%%d { b=%hu m=%hu f=%u p=%u s=%u r=%s n=%u }",
ntohl(msg->hdr.serial),
ntohs(ap->bufferSpace),
ntohs(ap->maxSkew),
seq,
ntohl(ap->previousPacket),
ntohl(serial),
rxrpc_acks[ap->reason],
call->ackr.nAcks
);
/* check the other side isn't ACK'ing a sequence number I haven't sent
* yet */
if (ap->nAcks > 0 &&
(seq > call->snd_seq_count ||
seq + ap->nAcks - 1 > call->snd_seq_count)) {
printk("Received ACK (#%u-#%u) for unsent packet\n",
seq, seq + ap->nAcks - 1);
rxrpc_call_abort(call, -EINVAL);
_leave("");
return;
}
/* deal with RTT calculation */
if (serial) {
struct rxrpc_message *rttmsg;
/* find the prompting packet */
spin_lock(&call->lock);
if (call->snd_ping && call->snd_ping->hdr.serial == serial) {
/* it was a ping packet */
rttmsg = call->snd_ping;
call->snd_ping = NULL;
spin_unlock(&call->lock);
if (rttmsg) {
rttmsg->rttdone = 1;
rxrpc_peer_calculate_rtt(call->conn->peer,
rttmsg, msg);
rxrpc_put_message(rttmsg);
}
}
else {
struct list_head *_p;
/* it ought to be a data packet - look in the pending
* ACK list */
list_for_each(_p, &call->acks_pendq) {
rttmsg = list_entry(_p, struct rxrpc_message,
link);
if (rttmsg->hdr.serial == serial) {
if (rttmsg->rttdone)
/* never do RTT twice without
* resending */
break;
rttmsg->rttdone = 1;
rxrpc_peer_calculate_rtt(
call->conn->peer, rttmsg, msg);
break;
}
}
spin_unlock(&call->lock);
}
}
switch (ap->reason) {
/* deal with negative/positive acknowledgement of data
* packets */
case RXRPC_ACK_REQUESTED:
case RXRPC_ACK_DELAY:
case RXRPC_ACK_IDLE:
rxrpc_call_definitively_ACK(call, seq - 1);
case RXRPC_ACK_DUPLICATE:
case RXRPC_ACK_OUT_OF_SEQUENCE:
case RXRPC_ACK_EXCEEDS_WINDOW:
call->snd_resend_cnt = 0;
ret = rxrpc_call_record_ACK(call, msg, seq, ap->nAcks);
if (ret < 0)
rxrpc_call_abort(call, ret);
break;
/* respond to ping packets immediately */
case RXRPC_ACK_PING:
rxrpc_call_generate_ACK(call, &msg->hdr, ap);
break;
/* only record RTT on ping response packets */
case RXRPC_ACK_PING_RESPONSE:
if (call->snd_ping) {
struct rxrpc_message *rttmsg;
/* only do RTT stuff if the response matches the
* retained ping */
rttmsg = NULL;
spin_lock(&call->lock);
if (call->snd_ping &&
call->snd_ping->hdr.serial == ap->serial) {
rttmsg = call->snd_ping;
call->snd_ping = NULL;
}
spin_unlock(&call->lock);
if (rttmsg) {
rttmsg->rttdone = 1;
rxrpc_peer_calculate_rtt(call->conn->peer,
rttmsg, msg);
rxrpc_put_message(rttmsg);
}
}
break;
default:
printk("Unsupported ACK reason %u\n", ap->reason);
break;
}
_leave("");
} /* end rxrpc_call_receive_ack_packet() */
/*****************************************************************************/
/*
* record definitive ACKs for all messages up to and including the one with the
* 'highest' seq
*/
static void rxrpc_call_definitively_ACK(struct rxrpc_call *call,
rxrpc_seq_t highest)
{
struct rxrpc_message *msg;
int now_complete;
_enter("%p{ads=%u},%u", call, call->acks_dftv_seq, highest);
while (call->acks_dftv_seq < highest) {
call->acks_dftv_seq++;
_proto("Definitive ACK on packet #%u", call->acks_dftv_seq);
/* discard those at front of queue until message with highest
* ACK is found */
spin_lock(&call->lock);
msg = NULL;
if (!list_empty(&call->acks_pendq)) {
msg = list_entry(call->acks_pendq.next,
struct rxrpc_message, link);
list_del_init(&msg->link); /* dequeue */
if (msg->state == RXRPC_MSG_SENT)
call->acks_pend_cnt--;
}
spin_unlock(&call->lock);
/* insanity check */
if (!msg)
panic("%s(): acks_pendq unexpectedly empty\n",
__FUNCTION__);
if (msg->seq != call->acks_dftv_seq)
panic("%s(): Packet #%u expected at front of acks_pendq"
" (#%u found)\n",
__FUNCTION__, call->acks_dftv_seq, msg->seq);
/* discard the message */
msg->state = RXRPC_MSG_DONE;
rxrpc_put_message(msg);
}
/* if all sent packets are definitively ACK'd then prod any sleepers just in case */
now_complete = 0;
spin_lock(&call->lock);
if (call->acks_dftv_seq == call->snd_seq_count) {
if (call->app_call_state != RXRPC_CSTATE_COMPLETE) {
call->app_call_state = RXRPC_CSTATE_COMPLETE;
_state(call);
now_complete = 1;
}
}
spin_unlock(&call->lock);
if (now_complete) {
del_timer_sync(&call->acks_timeout);
del_timer_sync(&call->rcv_timeout);
del_timer_sync(&call->ackr_dfr_timo);
call->app_attn_func(call);
}
_leave("");
} /* end rxrpc_call_definitively_ACK() */
/*****************************************************************************/
/*
* record the specified amount of ACKs/NAKs
*/
static int rxrpc_call_record_ACK(struct rxrpc_call *call,
struct rxrpc_message *msg,
rxrpc_seq_t seq,
size_t count)
{
struct rxrpc_message *dmsg;
struct list_head *_p;
rxrpc_seq_t highest;
unsigned ix;
size_t chunk;
char resend, now_complete;
u8 acks[16];
_enter("%p{apc=%u ads=%u},%p,%u,%Zu",
call, call->acks_pend_cnt, call->acks_dftv_seq,
msg, seq, count);
/* handle re-ACK'ing of definitively ACK'd packets (may be out-of-order
* ACKs) */
if (seq <= call->acks_dftv_seq) {
unsigned delta = call->acks_dftv_seq - seq;
if (count <= delta) {
_leave(" = 0 [all definitively ACK'd]");
return 0;
}
seq += delta;
count -= delta;
msg->offset += delta;
}
highest = seq + count - 1;
resend = 0;
while (count > 0) {
/* extract up to 16 ACK slots at a time */
chunk = min(count, sizeof(acks));
count -= chunk;
memset(acks, 2, sizeof(acks));
if (skb_copy_bits(msg->pkt, msg->offset, &acks, chunk) < 0) {
printk("Rx Received short ACK packet\n");
_leave(" = -EINVAL");
return -EINVAL;
}
msg->offset += chunk;
/* check that the ACK set is valid */
for (ix = 0; ix < chunk; ix++) {
switch (acks[ix]) {
case RXRPC_ACK_TYPE_ACK:
break;
case RXRPC_ACK_TYPE_NACK:
resend = 1;
break;
default:
printk("Rx Received unsupported ACK state"
" %u\n", acks[ix]);
_leave(" = -EINVAL");
return -EINVAL;
}
}
_proto("Rx ACK of packets #%u-#%u "
"[%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c] (pend=%u)",
seq, (unsigned) (seq + chunk - 1),
_acktype[acks[0x0]],
_acktype[acks[0x1]],
_acktype[acks[0x2]],
_acktype[acks[0x3]],
_acktype[acks[0x4]],
_acktype[acks[0x5]],
_acktype[acks[0x6]],
_acktype[acks[0x7]],
_acktype[acks[0x8]],
_acktype[acks[0x9]],
_acktype[acks[0xA]],
_acktype[acks[0xB]],
_acktype[acks[0xC]],
_acktype[acks[0xD]],
_acktype[acks[0xE]],
_acktype[acks[0xF]],
call->acks_pend_cnt
);
/* mark the packets in the ACK queue as being provisionally
* ACK'd */
ix = 0;
spin_lock(&call->lock);
/* find the first packet ACK'd/NAK'd here */
list_for_each(_p, &call->acks_pendq) {
dmsg = list_entry(_p, struct rxrpc_message, link);
if (dmsg->seq == seq)
goto found_first;
_debug("- %u: skipping #%u", ix, dmsg->seq);
}
goto bad_queue;
found_first:
do {
_debug("- %u: processing #%u (%c) apc=%u",
ix, dmsg->seq, _acktype[acks[ix]],
call->acks_pend_cnt);
if (acks[ix] == RXRPC_ACK_TYPE_ACK) {
if (dmsg->state == RXRPC_MSG_SENT)
call->acks_pend_cnt--;
dmsg->state = RXRPC_MSG_ACKED;
}
else {
if (dmsg->state == RXRPC_MSG_ACKED)
call->acks_pend_cnt++;
dmsg->state = RXRPC_MSG_SENT;
}
ix++;
seq++;
_p = dmsg->link.next;
dmsg = list_entry(_p, struct rxrpc_message, link);
} while(ix < chunk &&
_p != &call->acks_pendq &&
dmsg->seq == seq);
if (ix < chunk)
goto bad_queue;
spin_unlock(&call->lock);
}
if (resend)
rxrpc_call_resend(call, highest);
/* if all packets are provisionally ACK'd, then wake up anyone who's
* waiting for that */
now_complete = 0;
spin_lock(&call->lock);
if (call->acks_pend_cnt == 0) {
if (call->app_call_state == RXRPC_CSTATE_SRVR_RCV_FINAL_ACK) {
call->app_call_state = RXRPC_CSTATE_COMPLETE;
_state(call);
}
now_complete = 1;
}
spin_unlock(&call->lock);
if (now_complete) {
_debug("- wake up waiters");
del_timer_sync(&call->acks_timeout);
del_timer_sync(&call->rcv_timeout);
del_timer_sync(&call->ackr_dfr_timo);
call->app_attn_func(call);
}
_leave(" = 0 (apc=%u)", call->acks_pend_cnt);
return 0;
bad_queue:
panic("%s(): acks_pendq in bad state (packet #%u absent)\n",
__FUNCTION__, seq);
} /* end rxrpc_call_record_ACK() */
/*****************************************************************************/
/*
* transfer data from the ready packet queue to the asynchronous read buffer
* - since this func is the only one going to look at packets queued on
* app_readyq, we don't need a lock to modify or access them, only to modify
* the queue pointers
* - called with call->lock held
* - the buffer must be in kernel space
* - returns:
* 0 if buffer filled
* -EAGAIN if buffer not filled and more data to come
* -EBADMSG if last packet received and insufficient data left
* -ECONNABORTED if the call has in an error state
*/
static int __rxrpc_call_read_data(struct rxrpc_call *call)
{
struct rxrpc_message *msg;
size_t qty;
int ret;
_enter("%p{as=%d buf=%p qty=%Zu/%Zu}",
call,
call->app_async_read, call->app_read_buf,
call->app_ready_qty, call->app_mark);
/* check the state */
switch (call->app_call_state) {
case RXRPC_CSTATE_SRVR_RCV_ARGS:
case RXRPC_CSTATE_CLNT_RCV_REPLY:
if (call->app_last_rcv) {
printk("%s(%p,%p,%Zd):"
" Inconsistent call state (%s, last pkt)",
__FUNCTION__,
call, call->app_read_buf, call->app_mark,
rxrpc_call_states[call->app_call_state]);
BUG();
}
break;
case RXRPC_CSTATE_SRVR_RCV_OPID:
case RXRPC_CSTATE_SRVR_GOT_ARGS:
case RXRPC_CSTATE_CLNT_GOT_REPLY:
break;
case RXRPC_CSTATE_SRVR_SND_REPLY:
if (!call->app_last_rcv) {
printk("%s(%p,%p,%Zd):"
" Inconsistent call state (%s, not last pkt)",
__FUNCTION__,
call, call->app_read_buf, call->app_mark,
rxrpc_call_states[call->app_call_state]);
BUG();
}
_debug("Trying to read data from call in SND_REPLY state");
break;
case RXRPC_CSTATE_ERROR:
_leave(" = -ECONNABORTED");
return -ECONNABORTED;
default:
printk("reading in unexpected state [[[ %u ]]]\n",
call->app_call_state);
BUG();
}
/* handle the case of not having an async buffer */
if (!call->app_async_read) {
if (call->app_mark == RXRPC_APP_MARK_EOF) {
ret = call->app_last_rcv ? 0 : -EAGAIN;
}
else {
if (call->app_mark >= call->app_ready_qty) {
call->app_mark = RXRPC_APP_MARK_EOF;
ret = 0;
}
else {
ret = call->app_last_rcv ? -EBADMSG : -EAGAIN;
}
}
_leave(" = %d [no buf]", ret);
return 0;
}
while (!list_empty(&call->app_readyq) && call->app_mark > 0) {
msg = list_entry(call->app_readyq.next,
struct rxrpc_message, link);
/* drag as much data as we need out of this packet */
qty = min(call->app_mark, msg->dsize);
_debug("reading %Zu from skb=%p off=%lu",
qty, msg->pkt, msg->offset);
if (call->app_read_buf)
if (skb_copy_bits(msg->pkt, msg->offset,
call->app_read_buf, qty) < 0)
panic("%s: Failed to copy data from packet:"
" (%p,%p,%Zd)",
__FUNCTION__,
call, call->app_read_buf, qty);
/* if that packet is now empty, discard it */
call->app_ready_qty -= qty;
msg->dsize -= qty;
if (msg->dsize == 0) {
list_del_init(&msg->link);
rxrpc_put_message(msg);
}
else {
msg->offset += qty;
}
call->app_mark -= qty;
if (call->app_read_buf)
call->app_read_buf += qty;
}
if (call->app_mark == 0) {
call->app_async_read = 0;
call->app_mark = RXRPC_APP_MARK_EOF;
call->app_read_buf = NULL;
/* adjust the state if used up all packets */
if (list_empty(&call->app_readyq) && call->app_last_rcv) {
switch (call->app_call_state) {
case RXRPC_CSTATE_SRVR_RCV_OPID:
call->app_call_state = RXRPC_CSTATE_SRVR_SND_REPLY;
call->app_mark = RXRPC_APP_MARK_EOF;
_state(call);
del_timer_sync(&call->rcv_timeout);
break;
case RXRPC_CSTATE_SRVR_GOT_ARGS:
call->app_call_state = RXRPC_CSTATE_SRVR_SND_REPLY;
_state(call);
del_timer_sync(&call->rcv_timeout);
break;
default:
call->app_call_state = RXRPC_CSTATE_COMPLETE;
_state(call);
del_timer_sync(&call->acks_timeout);
del_timer_sync(&call->ackr_dfr_timo);
del_timer_sync(&call->rcv_timeout);
break;
}
}
_leave(" = 0");
return 0;
}
if (call->app_last_rcv) {
_debug("Insufficient data (%Zu/%Zu)",
call->app_ready_qty, call->app_mark);
call->app_async_read = 0;
call->app_mark = RXRPC_APP_MARK_EOF;
call->app_read_buf = NULL;
_leave(" = -EBADMSG");
return -EBADMSG;
}
_leave(" = -EAGAIN");
return -EAGAIN;
} /* end __rxrpc_call_read_data() */
/*****************************************************************************/
/*
* attempt to read the specified amount of data from the call's ready queue
* into the buffer provided
* - since this func is the only one going to look at packets queued on
* app_readyq, we don't need a lock to modify or access them, only to modify
* the queue pointers
* - if the buffer pointer is NULL, then data is merely drained, not copied
* - if flags&RXRPC_CALL_READ_BLOCK, then the function will wait until there is
* enough data or an error will be generated
* - note that the caller must have added the calling task to the call's wait
* queue beforehand
* - if flags&RXRPC_CALL_READ_ALL, then an error will be generated if this
* function doesn't read all available data
*/
int rxrpc_call_read_data(struct rxrpc_call *call,
void *buffer, size_t size, int flags)
{
int ret;
_enter("%p{arq=%Zu},%p,%Zd,%x",
call, call->app_ready_qty, buffer, size, flags);
spin_lock(&call->lock);
if (unlikely(!!call->app_read_buf)) {
spin_unlock(&call->lock);
_leave(" = -EBUSY");
return -EBUSY;
}
call->app_mark = size;
call->app_read_buf = buffer;
call->app_async_read = 1;
call->app_read_count++;
/* read as much data as possible */
ret = __rxrpc_call_read_data(call);
switch (ret) {
case 0:
if (flags & RXRPC_CALL_READ_ALL &&
(!call->app_last_rcv || call->app_ready_qty > 0)) {
_leave(" = -EBADMSG");
__rxrpc_call_abort(call, -EBADMSG);
return -EBADMSG;
}
spin_unlock(&call->lock);
call->app_attn_func(call);
_leave(" = 0");
return ret;
case -ECONNABORTED:
spin_unlock(&call->lock);
_leave(" = %d [aborted]", ret);
return ret;
default:
__rxrpc_call_abort(call, ret);
_leave(" = %d", ret);
return ret;
case -EAGAIN:
spin_unlock(&call->lock);
if (!(flags & RXRPC_CALL_READ_BLOCK)) {
_leave(" = -EAGAIN");
return -EAGAIN;
}
/* wait for the data to arrive */
_debug("blocking for data arrival");
for (;;) {
set_current_state(TASK_INTERRUPTIBLE);
if (!call->app_async_read || signal_pending(current))
break;
schedule();
}
set_current_state(TASK_RUNNING);
if (signal_pending(current)) {
_leave(" = -EINTR");
return -EINTR;
}
if (call->app_call_state == RXRPC_CSTATE_ERROR) {
_leave(" = -ECONNABORTED");
return -ECONNABORTED;
}
_leave(" = 0");
return 0;
}
} /* end rxrpc_call_read_data() */
/*****************************************************************************/
/*
* write data to a call
* - the data may not be sent immediately if it doesn't fill a buffer
* - if we can't queue all the data for buffering now, siov[] will have been
* adjusted to take account of what has been sent
*/
int rxrpc_call_write_data(struct rxrpc_call *call,
size_t sioc,
struct kvec *siov,
u8 rxhdr_flags,
gfp_t alloc_flags,
int dup_data,
size_t *size_sent)
{
struct rxrpc_message *msg;
struct kvec *sptr;
size_t space, size, chunk, tmp;
char *buf;
int ret;
_enter("%p,%Zu,%p,%02x,%x,%d,%p",
call, sioc, siov, rxhdr_flags, alloc_flags, dup_data,
size_sent);
*size_sent = 0;
size = 0;
ret = -EINVAL;
/* can't send more if we've sent last packet from this end */
switch (call->app_call_state) {
case RXRPC_CSTATE_SRVR_SND_REPLY:
case RXRPC_CSTATE_CLNT_SND_ARGS:
break;
case RXRPC_CSTATE_ERROR:
ret = call->app_errno;
default:
goto out;
}
/* calculate how much data we've been given */
sptr = siov;
for (; sioc > 0; sptr++, sioc--) {
if (!sptr->iov_len)
continue;
if (!sptr->iov_base)
goto out;
size += sptr->iov_len;
}
_debug("- size=%Zu mtu=%Zu", size, call->conn->mtu_size);
do {
/* make sure there's a message under construction */
if (!call->snd_nextmsg) {
/* no - allocate a message with no data yet attached */
ret = rxrpc_conn_newmsg(call->conn, call,
RXRPC_PACKET_TYPE_DATA,
0, NULL, alloc_flags,
&call->snd_nextmsg);
if (ret < 0)
goto out;
_debug("- allocated new message [ds=%Zu]",
call->snd_nextmsg->dsize);
}
msg = call->snd_nextmsg;
msg->hdr.flags |= rxhdr_flags;
/* deal with zero-length terminal packet */
if (size == 0) {
if (rxhdr_flags & RXRPC_LAST_PACKET) {
ret = rxrpc_call_flush(call);
if (ret < 0)
goto out;
}
break;
}
/* work out how much space current packet has available */
space = call->conn->mtu_size - msg->dsize;
chunk = min(space, size);
_debug("- [before] space=%Zu chunk=%Zu", space, chunk);
while (!siov->iov_len)
siov++;
/* if we are going to have to duplicate the data then coalesce
* it too */
if (dup_data) {
/* don't allocate more that 1 page at a time */
if (chunk > PAGE_SIZE)
chunk = PAGE_SIZE;
/* allocate a data buffer and attach to the message */
buf = kmalloc(chunk, alloc_flags);
if (unlikely(!buf)) {
if (msg->dsize ==
sizeof(struct rxrpc_header)) {
/* discard an empty msg and wind back
* the seq counter */
rxrpc_put_message(msg);
call->snd_nextmsg = NULL;
call->snd_seq_count--;
}
ret = -ENOMEM;
goto out;
}
tmp = msg->dcount++;
set_bit(tmp, &msg->dfree);
msg->data[tmp].iov_base = buf;
msg->data[tmp].iov_len = chunk;
msg->dsize += chunk;
*size_sent += chunk;
size -= chunk;
/* load the buffer with data */
while (chunk > 0) {
tmp = min(chunk, siov->iov_len);
memcpy(buf, siov->iov_base, tmp);
buf += tmp;
siov->iov_base += tmp;
siov->iov_len -= tmp;
if (!siov->iov_len)
siov++;
chunk -= tmp;
}
}
else {
/* we want to attach the supplied buffers directly */
while (chunk > 0 &&
msg->dcount < RXRPC_MSG_MAX_IOCS) {
tmp = msg->dcount++;
msg->data[tmp].iov_base = siov->iov_base;
msg->data[tmp].iov_len = siov->iov_len;
msg->dsize += siov->iov_len;
*size_sent += siov->iov_len;
size -= siov->iov_len;
chunk -= siov->iov_len;
siov++;
}
}
_debug("- [loaded] chunk=%Zu size=%Zu", chunk, size);
/* dispatch the message when full, final or requesting ACK */
if (msg->dsize >= call->conn->mtu_size || rxhdr_flags) {
ret = rxrpc_call_flush(call);
if (ret < 0)
goto out;
}
} while(size > 0);
ret = 0;
out:
_leave(" = %d (%Zd queued, %Zd rem)", ret, *size_sent, size);
return ret;
} /* end rxrpc_call_write_data() */
/*****************************************************************************/
/*
* flush outstanding packets to the network
*/
static int rxrpc_call_flush(struct rxrpc_call *call)
{
struct rxrpc_message *msg;
int ret = 0;
_enter("%p", call);
rxrpc_get_call(call);
/* if there's a packet under construction, then dispatch it now */
if (call->snd_nextmsg) {
msg = call->snd_nextmsg;
call->snd_nextmsg = NULL;
if (msg->hdr.flags & RXRPC_LAST_PACKET) {
msg->hdr.flags &= ~RXRPC_MORE_PACKETS;
if (call->app_call_state != RXRPC_CSTATE_CLNT_SND_ARGS)
msg->hdr.flags |= RXRPC_REQUEST_ACK;
}
else {
msg->hdr.flags |= RXRPC_MORE_PACKETS;
}
_proto("Sending DATA message { ds=%Zu dc=%u df=%02lu }",
msg->dsize, msg->dcount, msg->dfree);
/* queue and adjust call state */
spin_lock(&call->lock);
list_add_tail(&msg->link, &call->acks_pendq);
/* decide what to do depending on current state and if this is
* the last packet */
ret = -EINVAL;
switch (call->app_call_state) {
case RXRPC_CSTATE_SRVR_SND_REPLY:
if (msg->hdr.flags & RXRPC_LAST_PACKET) {
call->app_call_state =
RXRPC_CSTATE_SRVR_RCV_FINAL_ACK;
_state(call);
}
break;
case RXRPC_CSTATE_CLNT_SND_ARGS:
if (msg->hdr.flags & RXRPC_LAST_PACKET) {
call->app_call_state =
RXRPC_CSTATE_CLNT_RCV_REPLY;
_state(call);
}
break;
case RXRPC_CSTATE_ERROR:
ret = call->app_errno;
default:
spin_unlock(&call->lock);
goto out;
}
call->acks_pend_cnt++;
mod_timer(&call->acks_timeout,
__rxrpc_rtt_based_timeout(call,
rxrpc_call_acks_timeout));
spin_unlock(&call->lock);
ret = rxrpc_conn_sendmsg(call->conn, msg);
if (ret == 0)
call->pkt_snd_count++;
}
out:
rxrpc_put_call(call);
_leave(" = %d", ret);
return ret;
} /* end rxrpc_call_flush() */
/*****************************************************************************/
/*
* resend NAK'd or unacknowledged packets up to the highest one specified
*/
static void rxrpc_call_resend(struct rxrpc_call *call, rxrpc_seq_t highest)
{
struct rxrpc_message *msg;
struct list_head *_p;
rxrpc_seq_t seq = 0;
_enter("%p,%u", call, highest);
_proto("Rx Resend required");
/* handle too many resends */
if (call->snd_resend_cnt >= rxrpc_call_max_resend) {
_debug("Aborting due to too many resends (rcv=%d)",
call->pkt_rcv_count);
rxrpc_call_abort(call,
call->pkt_rcv_count > 0 ? -EIO : -ETIMEDOUT);
_leave("");
return;
}
spin_lock(&call->lock);
call->snd_resend_cnt++;
for (;;) {
/* determine which the next packet we might need to ACK is */
if (seq <= call->acks_dftv_seq)
seq = call->acks_dftv_seq;
seq++;
if (seq > highest)
break;
/* look for the packet in the pending-ACK queue */
list_for_each(_p, &call->acks_pendq) {
msg = list_entry(_p, struct rxrpc_message, link);
if (msg->seq == seq)
goto found_msg;
}
panic("%s(%p,%d):"
" Inconsistent pending-ACK queue (ds=%u sc=%u sq=%u)\n",
__FUNCTION__, call, highest,
call->acks_dftv_seq, call->snd_seq_count, seq);
found_msg:
if (msg->state != RXRPC_MSG_SENT)
continue; /* only un-ACK'd packets */
rxrpc_get_message(msg);
spin_unlock(&call->lock);
/* send each message again (and ignore any errors we might
* incur) */
_proto("Resending DATA message { ds=%Zu dc=%u df=%02lu }",
msg->dsize, msg->dcount, msg->dfree);
if (rxrpc_conn_sendmsg(call->conn, msg) == 0)
call->pkt_snd_count++;
rxrpc_put_message(msg);
spin_lock(&call->lock);
}
/* reset the timeout */
mod_timer(&call->acks_timeout,
__rxrpc_rtt_based_timeout(call, rxrpc_call_acks_timeout));
spin_unlock(&call->lock);
_leave("");
} /* end rxrpc_call_resend() */
/*****************************************************************************/
/*
* handle an ICMP error being applied to a call
*/
void rxrpc_call_handle_error(struct rxrpc_call *call, int local, int errno)
{
_enter("%p{%u},%d", call, ntohl(call->call_id), errno);
/* if this call is already aborted, then just wake up any waiters */
if (call->app_call_state == RXRPC_CSTATE_ERROR) {
call->app_error_func(call);
}
else {
/* tell the app layer what happened */
spin_lock(&call->lock);
call->app_call_state = RXRPC_CSTATE_ERROR;
_state(call);
if (local)
call->app_err_state = RXRPC_ESTATE_LOCAL_ERROR;
else
call->app_err_state = RXRPC_ESTATE_REMOTE_ERROR;
call->app_errno = errno;
call->app_mark = RXRPC_APP_MARK_EOF;
call->app_read_buf = NULL;
call->app_async_read = 0;
/* map the error */
call->app_aemap_func(call);
del_timer_sync(&call->acks_timeout);
del_timer_sync(&call->rcv_timeout);
del_timer_sync(&call->ackr_dfr_timo);
spin_unlock(&call->lock);
call->app_error_func(call);
}
_leave("");
} /* end rxrpc_call_handle_error() */
net/rxrpc/connection.c deleted 100644 → 0
View file @ 08e0e7c8
/* connection.c: Rx connection routines
*
* Copyright (C) 2002 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/sched.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <rxrpc/rxrpc.h>
#include <rxrpc/transport.h>
#include <rxrpc/peer.h>
#include <rxrpc/connection.h>
#include <rxrpc/call.h>
#include <rxrpc/message.h>
#include <linux/udp.h>
#include <linux/ip.h>
#include <net/sock.h>
#include <asm/uaccess.h>
#include "internal.h"
__RXACCT_DECL(atomic_t rxrpc_connection_count);
LIST_HEAD(rxrpc_conns);
DECLARE_RWSEM(rxrpc_conns_sem);
unsigned long rxrpc_conn_timeout = 60 * 60;
static void rxrpc_conn_do_timeout(struct rxrpc_connection *conn);
static void __rxrpc_conn_timeout(rxrpc_timer_t *timer)
{
struct rxrpc_connection *conn =
list_entry(timer, struct rxrpc_connection, timeout);
_debug("Rx CONN TIMEOUT [%p{u=%d}]", conn, atomic_read(&conn->usage));
rxrpc_conn_do_timeout(conn);
}
static const struct rxrpc_timer_ops rxrpc_conn_timer_ops = {
.timed_out = __rxrpc_conn_timeout,
};
/*****************************************************************************/
/*
* create a new connection record
*/
static inline int __rxrpc_create_connection(struct rxrpc_peer *peer,
struct rxrpc_connection **_conn)
{
struct rxrpc_connection *conn;
_enter("%p",peer);
/* allocate and initialise a connection record */
conn = kzalloc(sizeof(struct rxrpc_connection), GFP_KERNEL);
if (!conn) {
_leave(" = -ENOMEM");
return -ENOMEM;
}
atomic_set(&conn->usage, 1);
INIT_LIST_HEAD(&conn->link);
INIT_LIST_HEAD(&conn->id_link);
init_waitqueue_head(&conn->chanwait);
spin_lock_init(&conn->lock);
rxrpc_timer_init(&conn->timeout, &rxrpc_conn_timer_ops);
do_gettimeofday(&conn->atime);
conn->mtu_size = 1024;
conn->peer = peer;
conn->trans = peer->trans;
__RXACCT(atomic_inc(&rxrpc_connection_count));
*_conn = conn;
_leave(" = 0 (%p)", conn);
return 0;
} /* end __rxrpc_create_connection() */
/*****************************************************************************/
/*
* create a new connection record for outgoing connections
*/
int rxrpc_create_connection(struct rxrpc_transport *trans,
__be16 port,
__be32 addr,
uint16_t service_id,
void *security,
struct rxrpc_connection **_conn)
{
struct rxrpc_connection *candidate, *conn;
struct rxrpc_peer *peer;
struct list_head *_p;
__be32 connid;
int ret;
_enter("%p{%hu},%u,%hu", trans, trans->port, ntohs(port), service_id);
/* get a peer record */
ret = rxrpc_peer_lookup(trans, addr, &peer);
if (ret < 0) {
_leave(" = %d", ret);
return ret;
}
/* allocate and initialise a connection record */
ret = __rxrpc_create_connection(peer, &candidate);
if (ret < 0) {
rxrpc_put_peer(peer);
_leave(" = %d", ret);
return ret;
}
/* fill in the specific bits */
candidate->addr.sin_family = AF_INET;
candidate->addr.sin_port = port;
candidate->addr.sin_addr.s_addr = addr;
candidate->in_epoch = rxrpc_epoch;
candidate->out_epoch = rxrpc_epoch;
candidate->in_clientflag = 0;
candidate->out_clientflag = RXRPC_CLIENT_INITIATED;
candidate->service_id = htons(service_id);
/* invent a unique connection ID */
write_lock(&peer->conn_idlock);
try_next_id:
connid = htonl(peer->conn_idcounter & RXRPC_CIDMASK);
peer->conn_idcounter += RXRPC_MAXCALLS;
list_for_each(_p, &peer->conn_idlist) {
conn = list_entry(_p, struct rxrpc_connection, id_link);
if (connid == conn->conn_id)
goto try_next_id;
if (connid > conn->conn_id)
break;
}
_debug("selected candidate conn ID %x.%u",
ntohl(peer->addr.s_addr), ntohl(connid));
candidate->conn_id = connid;
list_add_tail(&candidate->id_link, _p);
write_unlock(&peer->conn_idlock);
/* attach to peer */
candidate->peer = peer;
write_lock(&peer->conn_lock);
/* search the peer's transport graveyard list */
spin_lock(&peer->conn_gylock);
list_for_each(_p, &peer->conn_graveyard) {
conn = list_entry(_p, struct rxrpc_connection, link);
if (conn->addr.sin_port == candidate->addr.sin_port &&
conn->security_ix == candidate->security_ix &&
conn->service_id == candidate->service_id &&
conn->in_clientflag == 0)
goto found_in_graveyard;
}
spin_unlock(&peer->conn_gylock);
/* pick the new candidate */
_debug("created connection: {%08x} [out]", ntohl(candidate->conn_id));
atomic_inc(&peer->conn_count);
conn = candidate;
candidate = NULL;
make_active:
list_add_tail(&conn->link, &peer->conn_active);
write_unlock(&peer->conn_lock);
if (candidate) {
write_lock(&peer->conn_idlock);
list_del(&candidate->id_link);
write_unlock(&peer->conn_idlock);
__RXACCT(atomic_dec(&rxrpc_connection_count));
kfree(candidate);
}
else {
down_write(&rxrpc_conns_sem);
list_add_tail(&conn->proc_link, &rxrpc_conns);
up_write(&rxrpc_conns_sem);
}
*_conn = conn;
_leave(" = 0 (%p)", conn);
return 0;
/* handle resurrecting a connection from the graveyard */
found_in_graveyard:
_debug("resurrecting connection: {%08x} [out]", ntohl(conn->conn_id));
rxrpc_get_connection(conn);
rxrpc_krxtimod_del_timer(&conn->timeout);
list_del_init(&conn->link);
spin_unlock(&peer->conn_gylock);
goto make_active;
} /* end rxrpc_create_connection() */
/*****************************************************************************/
/*
* lookup the connection for an incoming packet
* - create a new connection record for unrecorded incoming connections
*/
int rxrpc_connection_lookup(struct rxrpc_peer *peer,
struct rxrpc_message *msg,
struct rxrpc_connection **_conn)
{
struct rxrpc_connection *conn, *candidate = NULL;
struct list_head *_p;
struct sk_buff *pkt = msg->pkt;
int ret, fresh = 0;
__be32 x_epoch, x_connid;
__be16 x_port, x_servid;
__u32 x_secix;
u8 x_clflag;
_enter("%p{{%hu}},%u,%hu",
peer,
peer->trans->port,
ntohs(udp_hdr(pkt)->source),
ntohs(msg->hdr.serviceId));
x_port = udp_hdr(pkt)->source;
x_epoch = msg->hdr.epoch;
x_clflag = msg->hdr.flags & RXRPC_CLIENT_INITIATED;
x_connid = htonl(ntohl(msg->hdr.cid) & RXRPC_CIDMASK);
x_servid = msg->hdr.serviceId;
x_secix = msg->hdr.securityIndex;
/* [common case] search the transport's active list first */
read_lock(&peer->conn_lock);
list_for_each(_p, &peer->conn_active) {
conn = list_entry(_p, struct rxrpc_connection, link);
if (conn->addr.sin_port == x_port &&
conn->in_epoch == x_epoch &&
conn->conn_id == x_connid &&
conn->security_ix == x_secix &&
conn->service_id == x_servid &&
conn->in_clientflag == x_clflag)
goto found_active;
}
read_unlock(&peer->conn_lock);
/* [uncommon case] not active
* - create a candidate for a new record if an inbound connection
* - only examine the graveyard for an outbound connection
*/
if (x_clflag) {
ret = __rxrpc_create_connection(peer, &candidate);
if (ret < 0) {
_leave(" = %d", ret);
return ret;
}
/* fill in the specifics */
candidate->addr.sin_family = AF_INET;
candidate->addr.sin_port = x_port;
candidate->addr.sin_addr.s_addr = ip_hdr(pkt)->saddr;
candidate->in_epoch = x_epoch;
candidate->out_epoch = x_epoch;
candidate->in_clientflag = RXRPC_CLIENT_INITIATED;
candidate->out_clientflag = 0;
candidate->conn_id = x_connid;
candidate->service_id = x_servid;
candidate->security_ix = x_secix;
}
/* search the active list again, just in case it appeared whilst we
* were busy */
write_lock(&peer->conn_lock);
list_for_each(_p, &peer->conn_active) {
conn = list_entry(_p, struct rxrpc_connection, link);
if (conn->addr.sin_port == x_port &&
conn->in_epoch == x_epoch &&
conn->conn_id == x_connid &&
conn->security_ix == x_secix &&
conn->service_id == x_servid &&
conn->in_clientflag == x_clflag)
goto found_active_second_chance;
}
/* search the transport's graveyard list */
spin_lock(&peer->conn_gylock);
list_for_each(_p, &peer->conn_graveyard) {
conn = list_entry(_p, struct rxrpc_connection, link);
if (conn->addr.sin_port == x_port &&
conn->in_epoch == x_epoch &&
conn->conn_id == x_connid &&
conn->security_ix == x_secix &&
conn->service_id == x_servid &&
conn->in_clientflag == x_clflag)
goto found_in_graveyard;
}
spin_unlock(&peer->conn_gylock);
/* outbound connections aren't created here */
if (!x_clflag) {
write_unlock(&peer->conn_lock);
_leave(" = -ENOENT");
return -ENOENT;
}
/* we can now add the new candidate to the list */
_debug("created connection: {%08x} [in]", ntohl(candidate->conn_id));
rxrpc_get_peer(peer);
conn = candidate;
candidate = NULL;
atomic_inc(&peer->conn_count);
fresh = 1;
make_active:
list_add_tail(&conn->link, &peer->conn_active);
success_uwfree:
write_unlock(&peer->conn_lock);
if (candidate) {
write_lock(&peer->conn_idlock);
list_del(&candidate->id_link);
write_unlock(&peer->conn_idlock);
__RXACCT(atomic_dec(&rxrpc_connection_count));
kfree(candidate);
}
if (fresh) {
down_write(&rxrpc_conns_sem);
list_add_tail(&conn->proc_link, &rxrpc_conns);
up_write(&rxrpc_conns_sem);
}
success:
*_conn = conn;
_leave(" = 0 (%p)", conn);
return 0;
/* handle the connection being found in the active list straight off */
found_active:
rxrpc_get_connection(conn);
read_unlock(&peer->conn_lock);
goto success;
/* handle resurrecting a connection from the graveyard */
found_in_graveyard:
_debug("resurrecting connection: {%08x} [in]", ntohl(conn->conn_id));
rxrpc_get_peer(peer);
rxrpc_get_connection(conn);
rxrpc_krxtimod_del_timer(&conn->timeout);
list_del_init(&conn->link);
spin_unlock(&peer->conn_gylock);
goto make_active;
/* handle finding the connection on the second time through the active
* list */
found_active_second_chance:
rxrpc_get_connection(conn);
goto success_uwfree;
} /* end rxrpc_connection_lookup() */
/*****************************************************************************/
/*
* finish using a connection record
* - it will be transferred to the peer's connection graveyard when refcount
* reaches 0
*/
void rxrpc_put_connection(struct rxrpc_connection *conn)
{
struct rxrpc_peer *peer;
if (!conn)
return;
_enter("%p{u=%d p=%hu}",
conn, atomic_read(&conn->usage), ntohs(conn->addr.sin_port));
peer = conn->peer;
spin_lock(&peer->conn_gylock);
/* sanity check */
if (atomic_read(&conn->usage) <= 0)
BUG();
if (likely(!atomic_dec_and_test(&conn->usage))) {
spin_unlock(&peer->conn_gylock);
_leave("");
return;
}
/* move to graveyard queue */
_debug("burying connection: {%08x}", ntohl(conn->conn_id));
list_move_tail(&conn->link, &peer->conn_graveyard);
rxrpc_krxtimod_add_timer(&conn->timeout, rxrpc_conn_timeout * HZ);
spin_unlock(&peer->conn_gylock);
rxrpc_put_peer(conn->peer);
_leave(" [killed]");
} /* end rxrpc_put_connection() */
/*****************************************************************************/
/*
* free a connection record
*/
static void rxrpc_conn_do_timeout(struct rxrpc_connection *conn)
{
struct rxrpc_peer *peer;
_enter("%p{u=%d p=%hu}",
conn, atomic_read(&conn->usage), ntohs(conn->addr.sin_port));
peer = conn->peer;
if (atomic_read(&conn->usage) < 0)
BUG();
/* remove from graveyard if still dead */
spin_lock(&peer->conn_gylock);
if (atomic_read(&conn->usage) == 0) {
list_del_init(&conn->link);
}
else {
conn = NULL;
}
spin_unlock(&peer->conn_gylock);
if (!conn) {
_leave("");
return; /* resurrected */
}
_debug("--- Destroying Connection %p{%08x} ---",
conn, ntohl(conn->conn_id));
down_write(&rxrpc_conns_sem);
list_del(&conn->proc_link);
up_write(&rxrpc_conns_sem);
write_lock(&peer->conn_idlock);
list_del(&conn->id_link);
write_unlock(&peer->conn_idlock);
__RXACCT(atomic_dec(&rxrpc_connection_count));
kfree(conn);
/* if the graveyard is now empty, wake up anyone waiting for that */
if (atomic_dec_and_test(&peer->conn_count))
wake_up(&peer->conn_gy_waitq);
_leave(" [destroyed]");
} /* end rxrpc_conn_do_timeout() */
/*****************************************************************************/
/*
* clear all connection records from a peer endpoint
*/
void rxrpc_conn_clearall(struct rxrpc_peer *peer)
{
DECLARE_WAITQUEUE(myself, current);
struct rxrpc_connection *conn;
int err;
_enter("%p", peer);
/* there shouldn't be any active conns remaining */
if (!list_empty(&peer->conn_active))
BUG();
/* manually timeout all conns in the graveyard */
spin_lock(&peer->conn_gylock);
while (!list_empty(&peer->conn_graveyard)) {
conn = list_entry(peer->conn_graveyard.next,
struct rxrpc_connection, link);
err = rxrpc_krxtimod_del_timer(&conn->timeout);
spin_unlock(&peer->conn_gylock);
if (err == 0)
rxrpc_conn_do_timeout(conn);
spin_lock(&peer->conn_gylock);
}
spin_unlock(&peer->conn_gylock);
/* wait for the the conn graveyard to be completely cleared */
set_current_state(TASK_UNINTERRUPTIBLE);
add_wait_queue(&peer->conn_gy_waitq, &myself);
while (atomic_read(&peer->conn_count) != 0) {
schedule();
set_current_state(TASK_UNINTERRUPTIBLE);
}
remove_wait_queue(&peer->conn_gy_waitq, &myself);
set_current_state(TASK_RUNNING);
_leave("");
} /* end rxrpc_conn_clearall() */
/*****************************************************************************/
/*
* allocate and prepare a message for sending out through the transport
* endpoint
*/
int rxrpc_conn_newmsg(struct rxrpc_connection *conn,
struct rxrpc_call *call,
uint8_t type,
int dcount,
struct kvec diov[],
gfp_t alloc_flags,
struct rxrpc_message **_msg)
{
struct rxrpc_message *msg;
int loop;
_enter("%p{%d},%p,%u", conn, ntohs(conn->addr.sin_port), call, type);
if (dcount > 3) {
_leave(" = -EINVAL");
return -EINVAL;
}
msg = kzalloc(sizeof(struct rxrpc_message), alloc_flags);
if (!msg) {
_leave(" = -ENOMEM");
return -ENOMEM;
}
atomic_set(&msg->usage, 1);
INIT_LIST_HEAD(&msg->link);
msg->state = RXRPC_MSG_PREPARED;
msg->hdr.epoch = conn->out_epoch;
msg->hdr.cid = conn->conn_id | (call ? call->chan_ix : 0);
msg->hdr.callNumber = call ? call->call_id : 0;
msg->hdr.type = type;
msg->hdr.flags = conn->out_clientflag;
msg->hdr.securityIndex = conn->security_ix;
msg->hdr.serviceId = conn->service_id;
/* generate sequence numbers for data packets */
if (call) {
switch (type) {
case RXRPC_PACKET_TYPE_DATA:
msg->seq = ++call->snd_seq_count;
msg->hdr.seq = htonl(msg->seq);
break;
case RXRPC_PACKET_TYPE_ACK:
/* ACK sequence numbers are complicated. The following
* may be wrong:
* - jumbo packet ACKs should have a seq number
* - normal ACKs should not
*/
default:
break;
}
}
msg->dcount = dcount + 1;
msg->dsize = sizeof(msg->hdr);
msg->data[0].iov_len = sizeof(msg->hdr);
msg->data[0].iov_base = &msg->hdr;
for (loop=0; loop < dcount; loop++) {
msg->dsize += diov[loop].iov_len;
msg->data[loop+1].iov_len = diov[loop].iov_len;
msg->data[loop+1].iov_base = diov[loop].iov_base;
}
__RXACCT(atomic_inc(&rxrpc_message_count));
*_msg = msg;
_leave(" = 0 (%p) #%d", msg, atomic_read(&rxrpc_message_count));
return 0;
} /* end rxrpc_conn_newmsg() */
/*****************************************************************************/
/*
* free a message
*/
void __rxrpc_put_message(struct rxrpc_message *msg)
{
int loop;
_enter("%p #%d", msg, atomic_read(&rxrpc_message_count));
if (msg->pkt)
kfree_skb(msg->pkt);
rxrpc_put_connection(msg->conn);
for (loop = 0; loop < 8; loop++)
if (test_bit(loop, &msg->dfree))
kfree(msg->data[loop].iov_base);
__RXACCT(atomic_dec(&rxrpc_message_count));
kfree(msg);
_leave("");
} /* end __rxrpc_put_message() */
/*****************************************************************************/
/*
* send a message out through the transport endpoint
*/
int rxrpc_conn_sendmsg(struct rxrpc_connection *conn,
struct rxrpc_message *msg)
{
struct msghdr msghdr;
int ret;
_enter("%p{%d}", conn, ntohs(conn->addr.sin_port));
/* fill in some fields in the header */
spin_lock(&conn->lock);
msg->hdr.serial = htonl(++conn->serial_counter);
msg->rttdone = 0;
spin_unlock(&conn->lock);
/* set up the message to be transmitted */
msghdr.msg_name = &conn->addr;
msghdr.msg_namelen = sizeof(conn->addr);
msghdr.msg_control = NULL;
msghdr.msg_controllen = 0;
msghdr.msg_flags = MSG_CONFIRM | MSG_DONTWAIT;
_net("Sending message type %d of %Zd bytes to %08x:%d",
msg->hdr.type,
msg->dsize,
ntohl(conn->addr.sin_addr.s_addr),
ntohs(conn->addr.sin_port));
/* send the message */
ret = kernel_sendmsg(conn->trans->socket, &msghdr,
msg->data, msg->dcount, msg->dsize);
if (ret < 0) {
msg->state = RXRPC_MSG_ERROR;
} else {
msg->state = RXRPC_MSG_SENT;
ret = 0;
spin_lock(&conn->lock);
do_gettimeofday(&conn->atime);
msg->stamp = conn->atime;
spin_unlock(&conn->lock);
}
_leave(" = %d", ret);
return ret;
} /* end rxrpc_conn_sendmsg() */
/*****************************************************************************/
/*
* deal with a subsequent call packet
*/
int rxrpc_conn_receive_call_packet(struct rxrpc_connection *conn,
struct rxrpc_call *call,
struct rxrpc_message *msg)
{
struct rxrpc_message *pmsg;
struct dst_entry *dst;
struct list_head *_p;
unsigned cix, seq;
int ret = 0;
_enter("%p,%p,%p", conn, call, msg);
if (!call) {
cix = ntohl(msg->hdr.cid) & RXRPC_CHANNELMASK;
spin_lock(&conn->lock);
call = conn->channels[cix];
if (!call || call->call_id != msg->hdr.callNumber) {
spin_unlock(&conn->lock);
rxrpc_trans_immediate_abort(conn->trans, msg, -ENOENT);
goto out;
}
else {
rxrpc_get_call(call);
spin_unlock(&conn->lock);
}
}
else {
rxrpc_get_call(call);
}
_proto("Received packet %%%u [%u] on call %hu:%u:%u",
ntohl(msg->hdr.serial),
ntohl(msg->hdr.seq),
ntohs(msg->hdr.serviceId),
ntohl(conn->conn_id),
ntohl(call->call_id));
call->pkt_rcv_count++;
dst = msg->pkt->dst;
if (dst && dst->dev)
conn->peer->if_mtu =
dst->dev->mtu - dst->dev->hard_header_len;
/* queue on the call in seq order */
rxrpc_get_message(msg);
seq = msg->seq;
spin_lock(&call->lock);
list_for_each(_p, &call->rcv_receiveq) {
pmsg = list_entry(_p, struct rxrpc_message, link);
if (pmsg->seq > seq)
break;
}
list_add_tail(&msg->link, _p);
/* reset the activity timeout */
call->flags |= RXRPC_CALL_RCV_PKT;
mod_timer(&call->rcv_timeout,jiffies + rxrpc_call_rcv_timeout * HZ);
spin_unlock(&call->lock);
rxrpc_krxiod_queue_call(call);
rxrpc_put_call(call);
out:
_leave(" = %d", ret);
return ret;
} /* end rxrpc_conn_receive_call_packet() */
/*****************************************************************************/
/*
* handle an ICMP error being applied to a connection
*/
void rxrpc_conn_handle_error(struct rxrpc_connection *conn,
int local, int errno)
{
struct rxrpc_call *calls[4];
int loop;
_enter("%p{%d},%d", conn, ntohs(conn->addr.sin_port), errno);
/* get a ref to all my calls in one go */
memset(calls, 0, sizeof(calls));
spin_lock(&conn->lock);
for (loop = 3; loop >= 0; loop--) {
if (conn->channels[loop]) {
calls[loop] = conn->channels[loop];
rxrpc_get_call(calls[loop]);
}
}
spin_unlock(&conn->lock);
/* now kick them all */
for (loop = 3; loop >= 0; loop--) {
if (calls[loop]) {
rxrpc_call_handle_error(calls[loop], local, errno);
rxrpc_put_call(calls[loop]);
}
}
_leave("");
} /* end rxrpc_conn_handle_error() */
net/rxrpc/internal.h deleted 100644 → 0
View file @ 08e0e7c8
/* internal.h: internal Rx RPC stuff
*
* Copyright (c) 2002 David Howells (dhowells@redhat.com).
*/
#ifndef RXRPC_INTERNAL_H
#define RXRPC_INTERNAL_H
#include <linux/compiler.h>
#include <linux/kernel.h>
/*
* debug accounting
*/
#if 1
#define __RXACCT_DECL(X) X
#define __RXACCT(X) do { X; } while(0)
#else
#define __RXACCT_DECL(X)
#define __RXACCT(X) do { } while(0)
#endif
__RXACCT_DECL(extern atomic_t rxrpc_transport_count);
__RXACCT_DECL(extern atomic_t rxrpc_peer_count);
__RXACCT_DECL(extern atomic_t rxrpc_connection_count);
__RXACCT_DECL(extern atomic_t rxrpc_call_count);
__RXACCT_DECL(extern atomic_t rxrpc_message_count);
/*
* debug tracing
*/
#define kenter(FMT, a...) printk("==> %s("FMT")\n",__FUNCTION__ , ##a)
#define kleave(FMT, a...) printk("<== %s()"FMT"\n",__FUNCTION__ , ##a)
#define kdebug(FMT, a...) printk(" "FMT"\n" , ##a)
#define kproto(FMT, a...) printk("### "FMT"\n" , ##a)
#define knet(FMT, a...) printk(" "FMT"\n" , ##a)
#if 0
#define _enter(FMT, a...) kenter(FMT , ##a)
#define _leave(FMT, a...) kleave(FMT , ##a)
#define _debug(FMT, a...) kdebug(FMT , ##a)
#define _proto(FMT, a...) kproto(FMT , ##a)
#define _net(FMT, a...) knet(FMT , ##a)
#else
#define _enter(FMT, a...) do { if (rxrpc_ktrace) kenter(FMT , ##a); } while(0)
#define _leave(FMT, a...) do { if (rxrpc_ktrace) kleave(FMT , ##a); } while(0)
#define _debug(FMT, a...) do { if (rxrpc_kdebug) kdebug(FMT , ##a); } while(0)
#define _proto(FMT, a...) do { if (rxrpc_kproto) kproto(FMT , ##a); } while(0)
#define _net(FMT, a...) do { if (rxrpc_knet) knet (FMT , ##a); } while(0)
#endif
static inline void rxrpc_discard_my_signals(void)
{
while (signal_pending(current)) {
siginfo_t sinfo;
spin_lock_irq(&current->sighand->siglock);
dequeue_signal(current, &current->blocked, &sinfo);
spin_unlock_irq(&current->sighand->siglock);
}
}
/*
* call.c
*/
extern struct list_head rxrpc_calls;
extern struct rw_semaphore rxrpc_calls_sem;
/*
* connection.c
*/
extern struct list_head rxrpc_conns;
extern struct rw_semaphore rxrpc_conns_sem;
extern unsigned long rxrpc_conn_timeout;
extern void rxrpc_conn_clearall(struct rxrpc_peer *peer);
/*
* peer.c
*/
extern struct list_head rxrpc_peers;
extern struct rw_semaphore rxrpc_peers_sem;
extern unsigned long rxrpc_peer_timeout;
extern void rxrpc_peer_calculate_rtt(struct rxrpc_peer *peer,
struct rxrpc_message *msg,
struct rxrpc_message *resp);
extern void rxrpc_peer_clearall(struct rxrpc_transport *trans);
/*
* proc.c
*/
#ifdef CONFIG_PROC_FS
extern int rxrpc_proc_init(void);
extern void rxrpc_proc_cleanup(void);
#endif
/*
* transport.c
*/
extern struct list_head rxrpc_proc_transports;
extern struct rw_semaphore rxrpc_proc_transports_sem;
#endif /* RXRPC_INTERNAL_H */
net/rxrpc/krxiod.c deleted 100644 → 0
View file @ 08e0e7c8
/* krxiod.c: Rx I/O daemon
*
* Copyright (C) 2002 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/sched.h>
#include <linux/completion.h>
#include <linux/spinlock.h>
#include <linux/init.h>
#include <linux/freezer.h>
#include <rxrpc/krxiod.h>
#include <rxrpc/transport.h>
#include <rxrpc/peer.h>
#include <rxrpc/call.h>
#include "internal.h"
static DECLARE_WAIT_QUEUE_HEAD(rxrpc_krxiod_sleepq);
static DECLARE_COMPLETION(rxrpc_krxiod_dead);
static atomic_t rxrpc_krxiod_qcount = ATOMIC_INIT(0);
static LIST_HEAD(rxrpc_krxiod_transportq);
static DEFINE_SPINLOCK(rxrpc_krxiod_transportq_lock);
static LIST_HEAD(rxrpc_krxiod_callq);
static DEFINE_SPINLOCK(rxrpc_krxiod_callq_lock);
static volatile int rxrpc_krxiod_die;
/*****************************************************************************/
/*
* Rx I/O daemon
*/
static int rxrpc_krxiod(void *arg)
{
DECLARE_WAITQUEUE(krxiod,current);
printk("Started krxiod %d\n",current->pid);
daemonize("krxiod");
/* loop around waiting for work to do */
do {
/* wait for work or to be told to exit */
_debug("### Begin Wait");
if (!atomic_read(&rxrpc_krxiod_qcount)) {
set_current_state(TASK_INTERRUPTIBLE);
add_wait_queue(&rxrpc_krxiod_sleepq, &krxiod);
for (;;) {
set_current_state(TASK_INTERRUPTIBLE);
if (atomic_read(&rxrpc_krxiod_qcount) ||
rxrpc_krxiod_die ||
signal_pending(current))
break;
schedule();
}
remove_wait_queue(&rxrpc_krxiod_sleepq, &krxiod);
set_current_state(TASK_RUNNING);
}
_debug("### End Wait");
/* do work if been given some to do */
_debug("### Begin Work");
/* see if there's a transport in need of attention */
if (!list_empty(&rxrpc_krxiod_transportq)) {
struct rxrpc_transport *trans = NULL;
spin_lock_irq(&rxrpc_krxiod_transportq_lock);
if (!list_empty(&rxrpc_krxiod_transportq)) {
trans = list_entry(
rxrpc_krxiod_transportq.next,
struct rxrpc_transport,
krxiodq_link);
list_del_init(&trans->krxiodq_link);
atomic_dec(&rxrpc_krxiod_qcount);
/* make sure it hasn't gone away and doesn't go
* away */
if (atomic_read(&trans->usage)>0)
rxrpc_get_transport(trans);
else
trans = NULL;
}
spin_unlock_irq(&rxrpc_krxiod_transportq_lock);
if (trans) {
rxrpc_trans_receive_packet(trans);
rxrpc_put_transport(trans);
}
}
/* see if there's a call in need of attention */
if (!list_empty(&rxrpc_krxiod_callq)) {
struct rxrpc_call *call = NULL;
spin_lock_irq(&rxrpc_krxiod_callq_lock);
if (!list_empty(&rxrpc_krxiod_callq)) {
call = list_entry(rxrpc_krxiod_callq.next,
struct rxrpc_call,
rcv_krxiodq_lk);
list_del_init(&call->rcv_krxiodq_lk);
atomic_dec(&rxrpc_krxiod_qcount);
/* make sure it hasn't gone away and doesn't go
* away */
if (atomic_read(&call->usage) > 0) {
_debug("@@@ KRXIOD"
" Begin Attend Call %p", call);
rxrpc_get_call(call);
}
else {
call = NULL;
}
}
spin_unlock_irq(&rxrpc_krxiod_callq_lock);
if (call) {
rxrpc_call_do_stuff(call);
rxrpc_put_call(call);
_debug("@@@ KRXIOD End Attend Call %p", call);
}
}
_debug("### End Work");
try_to_freeze();
/* discard pending signals */
rxrpc_discard_my_signals();
} while (!rxrpc_krxiod_die);
/* and that's all */
complete_and_exit(&rxrpc_krxiod_dead, 0);
} /* end rxrpc_krxiod() */
/*****************************************************************************/
/*
* start up a krxiod daemon
*/
int __init rxrpc_krxiod_init(void)
{
return kernel_thread(rxrpc_krxiod, NULL, 0);
} /* end rxrpc_krxiod_init() */
/*****************************************************************************/
/*
* kill the krxiod daemon and wait for it to complete
*/
void rxrpc_krxiod_kill(void)
{
rxrpc_krxiod_die = 1;
wake_up_all(&rxrpc_krxiod_sleepq);
wait_for_completion(&rxrpc_krxiod_dead);
} /* end rxrpc_krxiod_kill() */
/*****************************************************************************/
/*
* queue a transport for attention by krxiod
*/
void rxrpc_krxiod_queue_transport(struct rxrpc_transport *trans)
{
unsigned long flags;
_enter("");
if (list_empty(&trans->krxiodq_link)) {
spin_lock_irqsave(&rxrpc_krxiod_transportq_lock, flags);
if (list_empty(&trans->krxiodq_link)) {
if (atomic_read(&trans->usage) > 0) {
list_add_tail(&trans->krxiodq_link,
&rxrpc_krxiod_transportq);
atomic_inc(&rxrpc_krxiod_qcount);
}
}
spin_unlock_irqrestore(&rxrpc_krxiod_transportq_lock, flags);
wake_up_all(&rxrpc_krxiod_sleepq);
}
_leave("");
} /* end rxrpc_krxiod_queue_transport() */
/*****************************************************************************/
/*
* dequeue a transport from krxiod's attention queue
*/
void rxrpc_krxiod_dequeue_transport(struct rxrpc_transport *trans)
{
unsigned long flags;
_enter("");
spin_lock_irqsave(&rxrpc_krxiod_transportq_lock, flags);
if (!list_empty(&trans->krxiodq_link)) {
list_del_init(&trans->krxiodq_link);
atomic_dec(&rxrpc_krxiod_qcount);
}
spin_unlock_irqrestore(&rxrpc_krxiod_transportq_lock, flags);
_leave("");
} /* end rxrpc_krxiod_dequeue_transport() */
/*****************************************************************************/
/*
* queue a call for attention by krxiod
*/
void rxrpc_krxiod_queue_call(struct rxrpc_call *call)
{
unsigned long flags;
if (list_empty(&call->rcv_krxiodq_lk)) {
spin_lock_irqsave(&rxrpc_krxiod_callq_lock, flags);
if (atomic_read(&call->usage) > 0) {
list_add_tail(&call->rcv_krxiodq_lk,
&rxrpc_krxiod_callq);
atomic_inc(&rxrpc_krxiod_qcount);
}
spin_unlock_irqrestore(&rxrpc_krxiod_callq_lock, flags);
}
wake_up_all(&rxrpc_krxiod_sleepq);
} /* end rxrpc_krxiod_queue_call() */
/*****************************************************************************/
/*
* dequeue a call from krxiod's attention queue
*/
void rxrpc_krxiod_dequeue_call(struct rxrpc_call *call)
{
unsigned long flags;
spin_lock_irqsave(&rxrpc_krxiod_callq_lock, flags);
if (!list_empty(&call->rcv_krxiodq_lk)) {
list_del_init(&call->rcv_krxiodq_lk);
atomic_dec(&rxrpc_krxiod_qcount);
}
spin_unlock_irqrestore(&rxrpc_krxiod_callq_lock, flags);
} /* end rxrpc_krxiod_dequeue_call() */
net/rxrpc/krxsecd.c deleted 100644 → 0
View file @ 08e0e7c8
/* krxsecd.c: Rx security daemon
*
* Copyright (C) 2002 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.
*
* This daemon deals with:
* - consulting the application as to whether inbound peers and calls should be authorised
* - generating security challenges for inbound connections
* - responding to security challenges on outbound connections
*/
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/completion.h>
#include <linux/spinlock.h>
#include <linux/init.h>
#include <rxrpc/krxsecd.h>
#include <rxrpc/transport.h>
#include <rxrpc/connection.h>
#include <rxrpc/message.h>
#include <rxrpc/peer.h>
#include <rxrpc/call.h>
#include <linux/udp.h>
#include <linux/ip.h>
#include <linux/freezer.h>
#include <net/sock.h>
#include "internal.h"
static DECLARE_WAIT_QUEUE_HEAD(rxrpc_krxsecd_sleepq);
static DECLARE_COMPLETION(rxrpc_krxsecd_dead);
static volatile int rxrpc_krxsecd_die;
static atomic_t rxrpc_krxsecd_qcount;
/* queue of unprocessed inbound messages with seqno #1 and
* RXRPC_CLIENT_INITIATED flag set */
static LIST_HEAD(rxrpc_krxsecd_initmsgq);
static DEFINE_SPINLOCK(rxrpc_krxsecd_initmsgq_lock);
static void rxrpc_krxsecd_process_incoming_call(struct rxrpc_message *msg);
/*****************************************************************************/
/*
* Rx security daemon
*/
static int rxrpc_krxsecd(void *arg)
{
DECLARE_WAITQUEUE(krxsecd, current);
int die;
printk("Started krxsecd %d\n", current->pid);
daemonize("krxsecd");
/* loop around waiting for work to do */
do {
/* wait for work or to be told to exit */
_debug("### Begin Wait");
if (!atomic_read(&rxrpc_krxsecd_qcount)) {
set_current_state(TASK_INTERRUPTIBLE);
add_wait_queue(&rxrpc_krxsecd_sleepq, &krxsecd);
for (;;) {
set_current_state(TASK_INTERRUPTIBLE);
if (atomic_read(&rxrpc_krxsecd_qcount) ||
rxrpc_krxsecd_die ||
signal_pending(current))
break;
schedule();
}
remove_wait_queue(&rxrpc_krxsecd_sleepq, &krxsecd);
set_current_state(TASK_RUNNING);
}
die = rxrpc_krxsecd_die;
_debug("### End Wait");
/* see if there're incoming calls in need of authenticating */
_debug("### Begin Inbound Calls");
if (!list_empty(&rxrpc_krxsecd_initmsgq)) {
struct rxrpc_message *msg = NULL;
spin_lock(&rxrpc_krxsecd_initmsgq_lock);
if (!list_empty(&rxrpc_krxsecd_initmsgq)) {
msg = list_entry(rxrpc_krxsecd_initmsgq.next,
struct rxrpc_message, link);
list_del_init(&msg->link);
atomic_dec(&rxrpc_krxsecd_qcount);
}
spin_unlock(&rxrpc_krxsecd_initmsgq_lock);
if (msg) {
rxrpc_krxsecd_process_incoming_call(msg);
rxrpc_put_message(msg);
}
}
_debug("### End Inbound Calls");
try_to_freeze();
/* discard pending signals */
rxrpc_discard_my_signals();
} while (!die);
/* and that's all */
complete_and_exit(&rxrpc_krxsecd_dead, 0);
} /* end rxrpc_krxsecd() */
/*****************************************************************************/
/*
* start up a krxsecd daemon
*/
int __init rxrpc_krxsecd_init(void)
{
return kernel_thread(rxrpc_krxsecd, NULL, 0);
} /* end rxrpc_krxsecd_init() */
/*****************************************************************************/
/*
* kill the krxsecd daemon and wait for it to complete
*/
void rxrpc_krxsecd_kill(void)
{
rxrpc_krxsecd_die = 1;
wake_up_all(&rxrpc_krxsecd_sleepq);
wait_for_completion(&rxrpc_krxsecd_dead);
} /* end rxrpc_krxsecd_kill() */
/*****************************************************************************/
/*
* clear all pending incoming calls for the specified transport
*/
void rxrpc_krxsecd_clear_transport(struct rxrpc_transport *trans)
{
LIST_HEAD(tmp);
struct rxrpc_message *msg;
struct list_head *_p, *_n;
_enter("%p",trans);
/* move all the messages for this transport onto a temp list */
spin_lock(&rxrpc_krxsecd_initmsgq_lock);
list_for_each_safe(_p, _n, &rxrpc_krxsecd_initmsgq) {
msg = list_entry(_p, struct rxrpc_message, link);
if (msg->trans == trans) {
list_move_tail(&msg->link, &tmp);
atomic_dec(&rxrpc_krxsecd_qcount);
}
}
spin_unlock(&rxrpc_krxsecd_initmsgq_lock);
/* zap all messages on the temp list */
while (!list_empty(&tmp)) {
msg = list_entry(tmp.next, struct rxrpc_message, link);
list_del_init(&msg->link);
rxrpc_put_message(msg);
}
_leave("");
} /* end rxrpc_krxsecd_clear_transport() */
/*****************************************************************************/
/*
* queue a message on the incoming calls list
*/
void rxrpc_krxsecd_queue_incoming_call(struct rxrpc_message *msg)
{
_enter("%p", msg);
/* queue for processing by krxsecd */
spin_lock(&rxrpc_krxsecd_initmsgq_lock);
if (!rxrpc_krxsecd_die) {
rxrpc_get_message(msg);
list_add_tail(&msg->link, &rxrpc_krxsecd_initmsgq);
atomic_inc(&rxrpc_krxsecd_qcount);
}
spin_unlock(&rxrpc_krxsecd_initmsgq_lock);
wake_up(&rxrpc_krxsecd_sleepq);
_leave("");
} /* end rxrpc_krxsecd_queue_incoming_call() */
/*****************************************************************************/
/*
* process the initial message of an incoming call
*/
void rxrpc_krxsecd_process_incoming_call(struct rxrpc_message *msg)
{
struct rxrpc_transport *trans = msg->trans;
struct rxrpc_service *srv;
struct rxrpc_call *call;
struct list_head *_p;
unsigned short sid;
int ret;
_enter("%p{tr=%p}", msg, trans);
ret = rxrpc_incoming_call(msg->conn, msg, &call);
if (ret < 0)
goto out;
/* find the matching service on the transport */
sid = ntohs(msg->hdr.serviceId);
srv = NULL;
spin_lock(&trans->lock);
list_for_each(_p, &trans->services) {
srv = list_entry(_p, struct rxrpc_service, link);
if (srv->service_id == sid && try_module_get(srv->owner)) {
/* found a match (made sure it won't vanish) */
_debug("found service '%s'", srv->name);
call->owner = srv->owner;
break;
}
}
spin_unlock(&trans->lock);
/* report the new connection
* - the func must inc the call's usage count to keep it
*/
ret = -ENOENT;
if (_p != &trans->services) {
/* attempt to accept the call */
call->conn->service = srv;
call->app_attn_func = srv->attn_func;
call->app_error_func = srv->error_func;
call->app_aemap_func = srv->aemap_func;
ret = srv->new_call(call);
/* send an abort if an error occurred */
if (ret < 0) {
rxrpc_call_abort(call, ret);
}
else {
/* formally receive and ACK the new packet */
ret = rxrpc_conn_receive_call_packet(call->conn,
call, msg);
}
}
rxrpc_put_call(call);
out:
if (ret < 0)
rxrpc_trans_immediate_abort(trans, msg, ret);
_leave(" (%d)", ret);
} /* end rxrpc_krxsecd_process_incoming_call() */
net/rxrpc/krxtimod.c deleted 100644 → 0
View file @ 08e0e7c8
/* krxtimod.c: RXRPC timeout daemon
*
* Copyright (C) 2002 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/module.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/completion.h>
#include <linux/freezer.h>
#include <rxrpc/rxrpc.h>
#include <rxrpc/krxtimod.h>
#include <asm/errno.h>
#include "internal.h"
static DECLARE_COMPLETION(krxtimod_alive);
static DECLARE_COMPLETION(krxtimod_dead);
static DECLARE_WAIT_QUEUE_HEAD(krxtimod_sleepq);
static int krxtimod_die;
static LIST_HEAD(krxtimod_list);
static DEFINE_SPINLOCK(krxtimod_lock);
static int krxtimod(void *arg);
/*****************************************************************************/
/*
* start the timeout daemon
*/
int rxrpc_krxtimod_start(void)
{
int ret;
ret = kernel_thread(krxtimod, NULL, 0);
if (ret < 0)
return ret;
wait_for_completion(&krxtimod_alive);
return ret;
} /* end rxrpc_krxtimod_start() */
/*****************************************************************************/
/*
* stop the timeout daemon
*/
void rxrpc_krxtimod_kill(void)
{
/* get rid of my daemon */
krxtimod_die = 1;
wake_up(&krxtimod_sleepq);
wait_for_completion(&krxtimod_dead);
} /* end rxrpc_krxtimod_kill() */
/*****************************************************************************/
/*
* timeout processing daemon
*/
static int krxtimod(void *arg)
{
DECLARE_WAITQUEUE(myself, current);
rxrpc_timer_t *timer;
printk("Started krxtimod %d\n", current->pid);
daemonize("krxtimod");
complete(&krxtimod_alive);
/* loop around looking for things to attend to */
loop:
set_current_state(TASK_INTERRUPTIBLE);
add_wait_queue(&krxtimod_sleepq, &myself);
for (;;) {
unsigned long jif;
long timeout;
/* deal with the server being asked to die */
if (krxtimod_die) {
remove_wait_queue(&krxtimod_sleepq, &myself);
_leave("");
complete_and_exit(&krxtimod_dead, 0);
}
try_to_freeze();
/* discard pending signals */
rxrpc_discard_my_signals();
/* work out the time to elapse before the next event */
spin_lock(&krxtimod_lock);
if (list_empty(&krxtimod_list)) {
timeout = MAX_SCHEDULE_TIMEOUT;
}
else {
timer = list_entry(krxtimod_list.next,
rxrpc_timer_t, link);
timeout = timer->timo_jif;
jif = jiffies;
if (time_before_eq((unsigned long) timeout, jif))
goto immediate;
else {
timeout = (long) timeout - (long) jiffies;
}
}
spin_unlock(&krxtimod_lock);
schedule_timeout(timeout);
set_current_state(TASK_INTERRUPTIBLE);
}
/* the thing on the front of the queue needs processing
* - we come here with the lock held and timer pointing to the expired
* entry
*/
immediate:
remove_wait_queue(&krxtimod_sleepq, &myself);
set_current_state(TASK_RUNNING);
_debug("@@@ Begin Timeout of %p", timer);
/* dequeue the timer */
list_del_init(&timer->link);
spin_unlock(&krxtimod_lock);
/* call the timeout function */
timer->ops->timed_out(timer);
_debug("@@@ End Timeout");
goto loop;
} /* end krxtimod() */
/*****************************************************************************/
/*
* (re-)queue a timer
*/
void rxrpc_krxtimod_add_timer(rxrpc_timer_t *timer, unsigned long timeout)
{
struct list_head *_p;
rxrpc_timer_t *ptimer;
_enter("%p,%lu", timer, timeout);
spin_lock(&krxtimod_lock);
list_del(&timer->link);
/* the timer was deferred or reset - put it back in the queue at the
* right place */
timer->timo_jif = jiffies + timeout;
list_for_each(_p, &krxtimod_list) {
ptimer = list_entry(_p, rxrpc_timer_t, link);
if (time_before(timer->timo_jif, ptimer->timo_jif))
break;
}
list_add_tail(&timer->link, _p); /* insert before stopping point */
spin_unlock(&krxtimod_lock);
wake_up(&krxtimod_sleepq);
_leave("");
} /* end rxrpc_krxtimod_add_timer() */
/*****************************************************************************/
/*
* dequeue a timer
* - returns 0 if the timer was deleted or -ENOENT if it wasn't queued
*/
int rxrpc_krxtimod_del_timer(rxrpc_timer_t *timer)
{
int ret = 0;
_enter("%p", timer);
spin_lock(&krxtimod_lock);
if (list_empty(&timer->link))
ret = -ENOENT;
else
list_del_init(&timer->link);
spin_unlock(&krxtimod_lock);
wake_up(&krxtimod_sleepq);
_leave(" = %d", ret);
return ret;
} /* end rxrpc_krxtimod_del_timer() */
net/rxrpc/main.c deleted 100644 → 0
View file @ 08e0e7c8
/* main.c: Rx RPC interface
*
* Copyright (C) 2002 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/module.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <rxrpc/rxrpc.h>
#include <rxrpc/krxiod.h>
#include <rxrpc/krxsecd.h>
#include <rxrpc/krxtimod.h>
#include <rxrpc/transport.h>
#include <rxrpc/connection.h>
#include <rxrpc/call.h>
#include <rxrpc/message.h>
#include "internal.h"
MODULE_DESCRIPTION("Rx RPC implementation");
MODULE_AUTHOR("Red Hat, Inc.");
MODULE_LICENSE("GPL");
__be32 rxrpc_epoch;
/*****************************************************************************/
/*
* initialise the Rx module
*/
static int __init rxrpc_initialise(void)
{
int ret;
/* my epoch value */
rxrpc_epoch = htonl(get_seconds());
/* register the /proc interface */
#ifdef CONFIG_PROC_FS
ret = rxrpc_proc_init();
if (ret<0)
return ret;
#endif
/* register the sysctl files */
#ifdef CONFIG_SYSCTL
ret = rxrpc_sysctl_init();
if (ret<0)
goto error_proc;
#endif
/* start the krxtimod daemon */
ret = rxrpc_krxtimod_start();
if (ret<0)
goto error_sysctl;
/* start the krxiod daemon */
ret = rxrpc_krxiod_init();
if (ret<0)
goto error_krxtimod;
/* start the krxsecd daemon */
ret = rxrpc_krxsecd_init();
if (ret<0)
goto error_krxiod;
kdebug("\n\n");
return 0;
error_krxiod:
rxrpc_krxiod_kill();
error_krxtimod:
rxrpc_krxtimod_kill();
error_sysctl:
#ifdef CONFIG_SYSCTL
rxrpc_sysctl_cleanup();
error_proc:
#endif
#ifdef CONFIG_PROC_FS
rxrpc_proc_cleanup();
#endif
return ret;
} /* end rxrpc_initialise() */
module_init(rxrpc_initialise);
/*****************************************************************************/
/*
* clean up the Rx module
*/
static void __exit rxrpc_cleanup(void)
{
kenter("");
__RXACCT(printk("Outstanding Messages : %d\n",
atomic_read(&rxrpc_message_count)));
__RXACCT(printk("Outstanding Calls : %d\n",
atomic_read(&rxrpc_call_count)));
__RXACCT(printk("Outstanding Connections: %d\n",
atomic_read(&rxrpc_connection_count)));
__RXACCT(printk("Outstanding Peers : %d\n",
atomic_read(&rxrpc_peer_count)));
__RXACCT(printk("Outstanding Transports : %d\n",
atomic_read(&rxrpc_transport_count)));
rxrpc_krxsecd_kill();
rxrpc_krxiod_kill();
rxrpc_krxtimod_kill();
#ifdef CONFIG_SYSCTL
rxrpc_sysctl_cleanup();
#endif
#ifdef CONFIG_PROC_FS
rxrpc_proc_cleanup();
#endif
__RXACCT(printk("Outstanding Messages : %d\n",
atomic_read(&rxrpc_message_count)));
__RXACCT(printk("Outstanding Calls : %d\n",
atomic_read(&rxrpc_call_count)));
__RXACCT(printk("Outstanding Connections: %d\n",
atomic_read(&rxrpc_connection_count)));
__RXACCT(printk("Outstanding Peers : %d\n",
atomic_read(&rxrpc_peer_count)));
__RXACCT(printk("Outstanding Transports : %d\n",
atomic_read(&rxrpc_transport_count)));
kleave("");
} /* end rxrpc_cleanup() */
module_exit(rxrpc_cleanup);
/*****************************************************************************/
/*
* clear the dead space between task_struct and kernel stack
* - called by supplying -finstrument-functions to gcc
*/
#if 0
void __cyg_profile_func_enter (void *this_fn, void *call_site)
__attribute__((no_instrument_function));
void __cyg_profile_func_enter (void *this_fn, void *call_site)
{
asm volatile(" movl %%esp,%%edi \n"
" andl %0,%%edi \n"
" addl %1,%%edi \n"
" movl %%esp,%%ecx \n"
" subl %%edi,%%ecx \n"
" shrl $2,%%ecx \n"
" movl $0xedededed,%%eax \n"
" rep stosl \n"
:
: "i"(~(THREAD_SIZE-1)), "i"(sizeof(struct thread_info))
: "eax", "ecx", "edi", "memory", "cc"
);
}
void __cyg_profile_func_exit(void *this_fn, void *call_site)
__attribute__((no_instrument_function));
void __cyg_profile_func_exit(void *this_fn, void *call_site)
{
asm volatile(" movl %%esp,%%edi \n"
" andl %0,%%edi \n"
" addl %1,%%edi \n"
" movl %%esp,%%ecx \n"
" subl %%edi,%%ecx \n"
" shrl $2,%%ecx \n"
" movl $0xdadadada,%%eax \n"
" rep stosl \n"
:
: "i"(~(THREAD_SIZE-1)), "i"(sizeof(struct thread_info))
: "eax", "ecx", "edi", "memory", "cc"
);
}
#endif
net/rxrpc/peer.c deleted 100644 → 0
View file @ 08e0e7c8
/* peer.c: Rx RPC peer management
*
* Copyright (C) 2002 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/sched.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <rxrpc/rxrpc.h>
#include <rxrpc/transport.h>
#include <rxrpc/peer.h>
#include <rxrpc/connection.h>
#include <rxrpc/call.h>
#include <rxrpc/message.h>
#include <linux/udp.h>
#include <linux/ip.h>
#include <net/sock.h>
#include <asm/uaccess.h>
#include <asm/div64.h>
#include "internal.h"
__RXACCT_DECL(atomic_t rxrpc_peer_count);
LIST_HEAD(rxrpc_peers);
DECLARE_RWSEM(rxrpc_peers_sem);
unsigned long rxrpc_peer_timeout = 12 * 60 * 60;
static void rxrpc_peer_do_timeout(struct rxrpc_peer *peer);
static void __rxrpc_peer_timeout(rxrpc_timer_t *timer)
{
struct rxrpc_peer *peer =
list_entry(timer, struct rxrpc_peer, timeout);
_debug("Rx PEER TIMEOUT [%p{u=%d}]", peer, atomic_read(&peer->usage));
rxrpc_peer_do_timeout(peer);
}
static const struct rxrpc_timer_ops rxrpc_peer_timer_ops = {
.timed_out = __rxrpc_peer_timeout,
};
/*****************************************************************************/
/*
* create a peer record
*/
static int __rxrpc_create_peer(struct rxrpc_transport *trans, __be32 addr,
struct rxrpc_peer **_peer)
{
struct rxrpc_peer *peer;
_enter("%p,%08x", trans, ntohl(addr));
/* allocate and initialise a peer record */
peer = kzalloc(sizeof(struct rxrpc_peer), GFP_KERNEL);
if (!peer) {
_leave(" = -ENOMEM");
return -ENOMEM;
}
atomic_set(&peer->usage, 1);
INIT_LIST_HEAD(&peer->link);
INIT_LIST_HEAD(&peer->proc_link);
INIT_LIST_HEAD(&peer->conn_idlist);
INIT_LIST_HEAD(&peer->conn_active);
INIT_LIST_HEAD(&peer->conn_graveyard);
spin_lock_init(&peer->conn_gylock);
init_waitqueue_head(&peer->conn_gy_waitq);
rwlock_init(&peer->conn_idlock);
rwlock_init(&peer->conn_lock);
atomic_set(&peer->conn_count, 0);
spin_lock_init(&peer->lock);
rxrpc_timer_init(&peer->timeout, &rxrpc_peer_timer_ops);
peer->addr.s_addr = addr;
peer->trans = trans;
peer->ops = trans->peer_ops;
__RXACCT(atomic_inc(&rxrpc_peer_count));
*_peer = peer;
_leave(" = 0 (%p)", peer);
return 0;
} /* end __rxrpc_create_peer() */
/*****************************************************************************/
/*
* find a peer record on the specified transport
* - returns (if successful) with peer record usage incremented
* - resurrects it from the graveyard if found there
*/
int rxrpc_peer_lookup(struct rxrpc_transport *trans, __be32 addr,
struct rxrpc_peer **_peer)
{
struct rxrpc_peer *peer, *candidate = NULL;
struct list_head *_p;
int ret;
_enter("%p{%hu},%08x", trans, trans->port, ntohl(addr));
/* [common case] search the transport's active list first */
read_lock(&trans->peer_lock);
list_for_each(_p, &trans->peer_active) {
peer = list_entry(_p, struct rxrpc_peer, link);
if (peer->addr.s_addr == addr)
goto found_active;
}
read_unlock(&trans->peer_lock);
/* [uncommon case] not active - create a candidate for a new record */
ret = __rxrpc_create_peer(trans, addr, &candidate);
if (ret < 0) {
_leave(" = %d", ret);
return ret;
}
/* search the active list again, just in case it appeared whilst we
* were busy */
write_lock(&trans->peer_lock);
list_for_each(_p, &trans->peer_active) {
peer = list_entry(_p, struct rxrpc_peer, link);
if (peer->addr.s_addr == addr)
goto found_active_second_chance;
}
/* search the transport's graveyard list */
spin_lock(&trans->peer_gylock);
list_for_each(_p, &trans->peer_graveyard) {
peer = list_entry(_p, struct rxrpc_peer, link);
if (peer->addr.s_addr == addr)
goto found_in_graveyard;
}
spin_unlock(&trans->peer_gylock);
/* we can now add the new candidate to the list
* - tell the application layer that this peer has been added
*/
rxrpc_get_transport(trans);
peer = candidate;
candidate = NULL;
if (peer->ops && peer->ops->adding) {
ret = peer->ops->adding(peer);
if (ret < 0) {
write_unlock(&trans->peer_lock);
__RXACCT(atomic_dec(&rxrpc_peer_count));
kfree(peer);
rxrpc_put_transport(trans);
_leave(" = %d", ret);
return ret;
}
}
atomic_inc(&trans->peer_count);
make_active:
list_add_tail(&peer->link, &trans->peer_active);
success_uwfree:
write_unlock(&trans->peer_lock);
if (candidate) {
__RXACCT(atomic_dec(&rxrpc_peer_count));
kfree(candidate);
}
if (list_empty(&peer->proc_link)) {
down_write(&rxrpc_peers_sem);
list_add_tail(&peer->proc_link, &rxrpc_peers);
up_write(&rxrpc_peers_sem);
}
success:
*_peer = peer;
_leave(" = 0 (%p{u=%d cc=%d})",
peer,
atomic_read(&peer->usage),
atomic_read(&peer->conn_count));
return 0;
/* handle the peer being found in the active list straight off */
found_active:
rxrpc_get_peer(peer);
read_unlock(&trans->peer_lock);
goto success;
/* handle resurrecting a peer from the graveyard */
found_in_graveyard:
rxrpc_get_peer(peer);
rxrpc_get_transport(peer->trans);
rxrpc_krxtimod_del_timer(&peer->timeout);
list_del_init(&peer->link);
spin_unlock(&trans->peer_gylock);
goto make_active;
/* handle finding the peer on the second time through the active
* list */
found_active_second_chance:
rxrpc_get_peer(peer);
goto success_uwfree;
} /* end rxrpc_peer_lookup() */
/*****************************************************************************/
/*
* finish with a peer record
* - it gets sent to the graveyard from where it can be resurrected or timed
* out
*/
void rxrpc_put_peer(struct rxrpc_peer *peer)
{
struct rxrpc_transport *trans = peer->trans;
_enter("%p{cc=%d a=%08x}",
peer,
atomic_read(&peer->conn_count),
ntohl(peer->addr.s_addr));
/* sanity check */
if (atomic_read(&peer->usage) <= 0)
BUG();
write_lock(&trans->peer_lock);
spin_lock(&trans->peer_gylock);
if (likely(!atomic_dec_and_test(&peer->usage))) {
spin_unlock(&trans->peer_gylock);
write_unlock(&trans->peer_lock);
_leave("");
return;
}
/* move to graveyard queue */
list_del(&peer->link);
write_unlock(&trans->peer_lock);
list_add_tail(&peer->link, &trans->peer_graveyard);
BUG_ON(!list_empty(&peer->conn_active));
rxrpc_krxtimod_add_timer(&peer->timeout, rxrpc_peer_timeout * HZ);
spin_unlock(&trans->peer_gylock);
rxrpc_put_transport(trans);
_leave(" [killed]");
} /* end rxrpc_put_peer() */
/*****************************************************************************/
/*
* handle a peer timing out in the graveyard
* - called from krxtimod
*/
static void rxrpc_peer_do_timeout(struct rxrpc_peer *peer)
{
struct rxrpc_transport *trans = peer->trans;
_enter("%p{u=%d cc=%d a=%08x}",
peer,
atomic_read(&peer->usage),
atomic_read(&peer->conn_count),
ntohl(peer->addr.s_addr));
BUG_ON(atomic_read(&peer->usage) < 0);
/* remove from graveyard if still dead */
spin_lock(&trans->peer_gylock);
if (atomic_read(&peer->usage) == 0)
list_del_init(&peer->link);
else
peer = NULL;
spin_unlock(&trans->peer_gylock);
if (!peer) {
_leave("");
return; /* resurrected */
}
/* clear all connections on this peer */
rxrpc_conn_clearall(peer);
BUG_ON(!list_empty(&peer->conn_active));
BUG_ON(!list_empty(&peer->conn_graveyard));
/* inform the application layer */
if (peer->ops && peer->ops->discarding)
peer->ops->discarding(peer);
if (!list_empty(&peer->proc_link)) {
down_write(&rxrpc_peers_sem);
list_del(&peer->proc_link);
up_write(&rxrpc_peers_sem);
}
__RXACCT(atomic_dec(&rxrpc_peer_count));
kfree(peer);
/* if the graveyard is now empty, wake up anyone waiting for that */
if (atomic_dec_and_test(&trans->peer_count))
wake_up(&trans->peer_gy_waitq);
_leave(" [destroyed]");
} /* end rxrpc_peer_do_timeout() */
/*****************************************************************************/
/*
* clear all peer records from a transport endpoint
*/
void rxrpc_peer_clearall(struct rxrpc_transport *trans)
{
DECLARE_WAITQUEUE(myself,current);
struct rxrpc_peer *peer;
int err;
_enter("%p",trans);
/* there shouldn't be any active peers remaining */
BUG_ON(!list_empty(&trans->peer_active));
/* manually timeout all peers in the graveyard */
spin_lock(&trans->peer_gylock);
while (!list_empty(&trans->peer_graveyard)) {
peer = list_entry(trans->peer_graveyard.next,
struct rxrpc_peer, link);
_debug("Clearing peer %p\n", peer);
err = rxrpc_krxtimod_del_timer(&peer->timeout);
spin_unlock(&trans->peer_gylock);
if (err == 0)
rxrpc_peer_do_timeout(peer);
spin_lock(&trans->peer_gylock);
}
spin_unlock(&trans->peer_gylock);
/* wait for the the peer graveyard to be completely cleared */
set_current_state(TASK_UNINTERRUPTIBLE);
add_wait_queue(&trans->peer_gy_waitq, &myself);
while (atomic_read(&trans->peer_count) != 0) {
schedule();
set_current_state(TASK_UNINTERRUPTIBLE);
}
remove_wait_queue(&trans->peer_gy_waitq, &myself);
set_current_state(TASK_RUNNING);
_leave("");
} /* end rxrpc_peer_clearall() */
/*****************************************************************************/
/*
* calculate and cache the Round-Trip-Time for a message and its response
*/
void rxrpc_peer_calculate_rtt(struct rxrpc_peer *peer,
struct rxrpc_message *msg,
struct rxrpc_message *resp)
{
unsigned long long rtt;
int loop;
_enter("%p,%p,%p", peer, msg, resp);
/* calculate the latest RTT */
rtt = resp->stamp.tv_sec - msg->stamp.tv_sec;
rtt *= 1000000UL;
rtt += resp->stamp.tv_usec - msg->stamp.tv_usec;
/* add to cache */
peer->rtt_cache[peer->rtt_point] = rtt;
peer->rtt_point++;
peer->rtt_point %= RXRPC_RTT_CACHE_SIZE;
if (peer->rtt_usage < RXRPC_RTT_CACHE_SIZE)
peer->rtt_usage++;
/* recalculate RTT */
rtt = 0;
for (loop = peer->rtt_usage - 1; loop >= 0; loop--)
rtt += peer->rtt_cache[loop];
do_div(rtt, peer->rtt_usage);
peer->rtt = rtt;
_leave(" RTT=%lu.%lums",
(long) (peer->rtt / 1000), (long) (peer->rtt % 1000));
} /* end rxrpc_peer_calculate_rtt() */
net/rxrpc/proc.c deleted 100644 → 0
View file @ 08e0e7c8
/* proc.c: /proc interface for RxRPC
*
* Copyright (C) 2002 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/sched.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <rxrpc/rxrpc.h>
#include <rxrpc/transport.h>
#include <rxrpc/peer.h>
#include <rxrpc/connection.h>
#include <rxrpc/call.h>
#include <rxrpc/message.h>
#include "internal.h"
static struct proc_dir_entry *proc_rxrpc;
static int rxrpc_proc_transports_open(struct inode *inode, struct file *file);
static void *rxrpc_proc_transports_start(struct seq_file *p, loff_t *pos);
static void *rxrpc_proc_transports_next(struct seq_file *p, void *v, loff_t *pos);
static void rxrpc_proc_transports_stop(struct seq_file *p, void *v);
static int rxrpc_proc_transports_show(struct seq_file *m, void *v);
static struct seq_operations rxrpc_proc_transports_ops = {
.start = rxrpc_proc_transports_start,
.next = rxrpc_proc_transports_next,
.stop = rxrpc_proc_transports_stop,
.show = rxrpc_proc_transports_show,
};
static const struct file_operations rxrpc_proc_transports_fops = {
.open = rxrpc_proc_transports_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
static int rxrpc_proc_peers_open(struct inode *inode, struct file *file);
static void *rxrpc_proc_peers_start(struct seq_file *p, loff_t *pos);
static void *rxrpc_proc_peers_next(struct seq_file *p, void *v, loff_t *pos);
static void rxrpc_proc_peers_stop(struct seq_file *p, void *v);
static int rxrpc_proc_peers_show(struct seq_file *m, void *v);
static struct seq_operations rxrpc_proc_peers_ops = {
.start = rxrpc_proc_peers_start,
.next = rxrpc_proc_peers_next,
.stop = rxrpc_proc_peers_stop,
.show = rxrpc_proc_peers_show,
};
static const struct file_operations rxrpc_proc_peers_fops = {
.open = rxrpc_proc_peers_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
static int rxrpc_proc_conns_open(struct inode *inode, struct file *file);
static void *rxrpc_proc_conns_start(struct seq_file *p, loff_t *pos);
static void *rxrpc_proc_conns_next(struct seq_file *p, void *v, loff_t *pos);
static void rxrpc_proc_conns_stop(struct seq_file *p, void *v);
static int rxrpc_proc_conns_show(struct seq_file *m, void *v);
static struct seq_operations rxrpc_proc_conns_ops = {
.start = rxrpc_proc_conns_start,
.next = rxrpc_proc_conns_next,
.stop = rxrpc_proc_conns_stop,
.show = rxrpc_proc_conns_show,
};
static const struct file_operations rxrpc_proc_conns_fops = {
.open = rxrpc_proc_conns_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
static int rxrpc_proc_calls_open(struct inode *inode, struct file *file);
static void *rxrpc_proc_calls_start(struct seq_file *p, loff_t *pos);
static void *rxrpc_proc_calls_next(struct seq_file *p, void *v, loff_t *pos);
static void rxrpc_proc_calls_stop(struct seq_file *p, void *v);
static int rxrpc_proc_calls_show(struct seq_file *m, void *v);
static struct seq_operations rxrpc_proc_calls_ops = {
.start = rxrpc_proc_calls_start,
.next = rxrpc_proc_calls_next,
.stop = rxrpc_proc_calls_stop,
.show = rxrpc_proc_calls_show,
};
static const struct file_operations rxrpc_proc_calls_fops = {
.open = rxrpc_proc_calls_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
static const char *rxrpc_call_states7[] = {
"complet",
"error ",
"rcv_op ",
"rcv_arg",
"got_arg",
"snd_rpl",
"fin_ack",
"snd_arg",
"rcv_rpl",
"got_rpl"
};
static const char *rxrpc_call_error_states7[] = {
"no_err ",
"loc_abt",
"rmt_abt",
"loc_err",
"rmt_err"
};
/*****************************************************************************/
/*
* initialise the /proc/net/rxrpc/ directory
*/
int rxrpc_proc_init(void)
{
struct proc_dir_entry *p;
proc_rxrpc = proc_mkdir("rxrpc", proc_net);
if (!proc_rxrpc)
goto error;
proc_rxrpc->owner = THIS_MODULE;
p = create_proc_entry("calls", 0, proc_rxrpc);
if (!p)
goto error_proc;
p->proc_fops = &rxrpc_proc_calls_fops;
p->owner = THIS_MODULE;
p = create_proc_entry("connections", 0, proc_rxrpc);
if (!p)
goto error_calls;
p->proc_fops = &rxrpc_proc_conns_fops;
p->owner = THIS_MODULE;
p = create_proc_entry("peers", 0, proc_rxrpc);
if (!p)
goto error_calls;
p->proc_fops = &rxrpc_proc_peers_fops;
p->owner = THIS_MODULE;
p = create_proc_entry("transports", 0, proc_rxrpc);
if (!p)
goto error_conns;
p->proc_fops = &rxrpc_proc_transports_fops;
p->owner = THIS_MODULE;
return 0;
error_conns:
remove_proc_entry("connections", proc_rxrpc);
error_calls:
remove_proc_entry("calls", proc_rxrpc);
error_proc:
remove_proc_entry("rxrpc", proc_net);
error:
return -ENOMEM;
} /* end rxrpc_proc_init() */
/*****************************************************************************/
/*
* clean up the /proc/net/rxrpc/ directory
*/
void rxrpc_proc_cleanup(void)
{
remove_proc_entry("transports", proc_rxrpc);
remove_proc_entry("peers", proc_rxrpc);
remove_proc_entry("connections", proc_rxrpc);
remove_proc_entry("calls", proc_rxrpc);
remove_proc_entry("rxrpc", proc_net);
} /* end rxrpc_proc_cleanup() */
/*****************************************************************************/
/*
* open "/proc/net/rxrpc/transports" which provides a summary of extant transports
*/
static int rxrpc_proc_transports_open(struct inode *inode, struct file *file)
{
struct seq_file *m;
int ret;
ret = seq_open(file, &rxrpc_proc_transports_ops);
if (ret < 0)
return ret;
m = file->private_data;
m->private = PDE(inode)->data;
return 0;
} /* end rxrpc_proc_transports_open() */
/*****************************************************************************/
/*
* set up the iterator to start reading from the transports list and return the first item
*/
static void *rxrpc_proc_transports_start(struct seq_file *m, loff_t *_pos)
{
struct list_head *_p;
loff_t pos = *_pos;
/* lock the list against modification */
down_read(&rxrpc_proc_transports_sem);
/* allow for the header line */
if (!pos)
return SEQ_START_TOKEN;
pos--;
/* find the n'th element in the list */
list_for_each(_p, &rxrpc_proc_transports)
if (!pos--)
break;
return _p != &rxrpc_proc_transports ? _p : NULL;
} /* end rxrpc_proc_transports_start() */
/*****************************************************************************/
/*
* move to next call in transports list
*/
static void *rxrpc_proc_transports_next(struct seq_file *p, void *v, loff_t *pos)
{
struct list_head *_p;
(*pos)++;
_p = v;
_p = (v == SEQ_START_TOKEN) ? rxrpc_proc_transports.next : _p->next;
return _p != &rxrpc_proc_transports ? _p : NULL;
} /* end rxrpc_proc_transports_next() */
/*****************************************************************************/
/*
* clean up after reading from the transports list
*/
static void rxrpc_proc_transports_stop(struct seq_file *p, void *v)
{
up_read(&rxrpc_proc_transports_sem);
} /* end rxrpc_proc_transports_stop() */
/*****************************************************************************/
/*
* display a header line followed by a load of call lines
*/
static int rxrpc_proc_transports_show(struct seq_file *m, void *v)
{
struct rxrpc_transport *trans =
list_entry(v, struct rxrpc_transport, proc_link);
/* display header on line 1 */
if (v == SEQ_START_TOKEN) {
seq_puts(m, "LOCAL USE\n");
return 0;
}
/* display one transport per line on subsequent lines */
seq_printf(m, "%5hu %3d\n",
trans->port,
atomic_read(&trans->usage)
);
return 0;
} /* end rxrpc_proc_transports_show() */
/*****************************************************************************/
/*
* open "/proc/net/rxrpc/peers" which provides a summary of extant peers
*/
static int rxrpc_proc_peers_open(struct inode *inode, struct file *file)
{
struct seq_file *m;
int ret;
ret = seq_open(file, &rxrpc_proc_peers_ops);
if (ret < 0)
return ret;
m = file->private_data;
m->private = PDE(inode)->data;
return 0;
} /* end rxrpc_proc_peers_open() */
/*****************************************************************************/
/*
* set up the iterator to start reading from the peers list and return the
* first item
*/
static void *rxrpc_proc_peers_start(struct seq_file *m, loff_t *_pos)
{
struct list_head *_p;
loff_t pos = *_pos;
/* lock the list against modification */
down_read(&rxrpc_peers_sem);
/* allow for the header line */
if (!pos)
return SEQ_START_TOKEN;
pos--;
/* find the n'th element in the list */
list_for_each(_p, &rxrpc_peers)
if (!pos--)
break;
return _p != &rxrpc_peers ? _p : NULL;
} /* end rxrpc_proc_peers_start() */
/*****************************************************************************/
/*
* move to next conn in peers list
*/
static void *rxrpc_proc_peers_next(struct seq_file *p, void *v, loff_t *pos)
{
struct list_head *_p;
(*pos)++;
_p = v;
_p = (v == SEQ_START_TOKEN) ? rxrpc_peers.next : _p->next;
return _p != &rxrpc_peers ? _p : NULL;
} /* end rxrpc_proc_peers_next() */
/*****************************************************************************/
/*
* clean up after reading from the peers list
*/
static void rxrpc_proc_peers_stop(struct seq_file *p, void *v)
{
up_read(&rxrpc_peers_sem);
} /* end rxrpc_proc_peers_stop() */
/*****************************************************************************/
/*
* display a header line followed by a load of conn lines
*/
static int rxrpc_proc_peers_show(struct seq_file *m, void *v)
{
struct rxrpc_peer *peer = list_entry(v, struct rxrpc_peer, proc_link);
long timeout;
/* display header on line 1 */
if (v == SEQ_START_TOKEN) {
seq_puts(m, "LOCAL REMOTE USAGE CONNS TIMEOUT"
" MTU RTT(uS)\n");
return 0;
}
/* display one peer per line on subsequent lines */
timeout = 0;
if (!list_empty(&peer->timeout.link))
timeout = (long) peer->timeout.timo_jif -
(long) jiffies;
seq_printf(m, "%5hu %08x %5d %5d %8ld %5Zu %7lu\n",
peer->trans->port,
ntohl(peer->addr.s_addr),
atomic_read(&peer->usage),
atomic_read(&peer->conn_count),
timeout,
peer->if_mtu,
(long) peer->rtt
);
return 0;
} /* end rxrpc_proc_peers_show() */
/*****************************************************************************/
/*
* open "/proc/net/rxrpc/connections" which provides a summary of extant
* connections
*/
static int rxrpc_proc_conns_open(struct inode *inode, struct file *file)
{
struct seq_file *m;
int ret;
ret = seq_open(file, &rxrpc_proc_conns_ops);
if (ret < 0)
return ret;
m = file->private_data;
m->private = PDE(inode)->data;
return 0;
} /* end rxrpc_proc_conns_open() */
/*****************************************************************************/
/*
* set up the iterator to start reading from the conns list and return the
* first item
*/
static void *rxrpc_proc_conns_start(struct seq_file *m, loff_t *_pos)
{
struct list_head *_p;
loff_t pos = *_pos;
/* lock the list against modification */
down_read(&rxrpc_conns_sem);
/* allow for the header line */
if (!pos)
return SEQ_START_TOKEN;
pos--;
/* find the n'th element in the list */
list_for_each(_p, &rxrpc_conns)
if (!pos--)
break;
return _p != &rxrpc_conns ? _p : NULL;
} /* end rxrpc_proc_conns_start() */
/*****************************************************************************/
/*
* move to next conn in conns list
*/
static void *rxrpc_proc_conns_next(struct seq_file *p, void *v, loff_t *pos)
{
struct list_head *_p;
(*pos)++;
_p = v;
_p = (v == SEQ_START_TOKEN) ? rxrpc_conns.next : _p->next;
return _p != &rxrpc_conns ? _p : NULL;
} /* end rxrpc_proc_conns_next() */
/*****************************************************************************/
/*
* clean up after reading from the conns list
*/
static void rxrpc_proc_conns_stop(struct seq_file *p, void *v)
{
up_read(&rxrpc_conns_sem);
} /* end rxrpc_proc_conns_stop() */
/*****************************************************************************/
/*
* display a header line followed by a load of conn lines
*/
static int rxrpc_proc_conns_show(struct seq_file *m, void *v)
{
struct rxrpc_connection *conn;
long timeout;
conn = list_entry(v, struct rxrpc_connection, proc_link);
/* display header on line 1 */
if (v == SEQ_START_TOKEN) {
seq_puts(m,
"LOCAL REMOTE RPORT SRVC CONN END SERIALNO "
"CALLNO MTU TIMEOUT"
"\n");
return 0;
}
/* display one conn per line on subsequent lines */
timeout = 0;
if (!list_empty(&conn->timeout.link))
timeout = (long) conn->timeout.timo_jif -
(long) jiffies;
seq_printf(m,
"%5hu %08x %5hu %04hx %08x %-3.3s %08x %08x %5Zu %8ld\n",
conn->trans->port,
ntohl(conn->addr.sin_addr.s_addr),
ntohs(conn->addr.sin_port),
ntohs(conn->service_id),
ntohl(conn->conn_id),
conn->out_clientflag ? "CLT" : "SRV",
conn->serial_counter,
conn->call_counter,
conn->mtu_size,
timeout
);
return 0;
} /* end rxrpc_proc_conns_show() */
/*****************************************************************************/
/*
* open "/proc/net/rxrpc/calls" which provides a summary of extant calls
*/
static int rxrpc_proc_calls_open(struct inode *inode, struct file *file)
{
struct seq_file *m;
int ret;
ret = seq_open(file, &rxrpc_proc_calls_ops);
if (ret < 0)
return ret;
m = file->private_data;
m->private = PDE(inode)->data;
return 0;
} /* end rxrpc_proc_calls_open() */
/*****************************************************************************/
/*
* set up the iterator to start reading from the calls list and return the
* first item
*/
static void *rxrpc_proc_calls_start(struct seq_file *m, loff_t *_pos)
{
struct list_head *_p;
loff_t pos = *_pos;
/* lock the list against modification */
down_read(&rxrpc_calls_sem);
/* allow for the header line */
if (!pos)
return SEQ_START_TOKEN;
pos--;
/* find the n'th element in the list */
list_for_each(_p, &rxrpc_calls)
if (!pos--)
break;
return _p != &rxrpc_calls ? _p : NULL;
} /* end rxrpc_proc_calls_start() */
/*****************************************************************************/
/*
* move to next call in calls list
*/
static void *rxrpc_proc_calls_next(struct seq_file *p, void *v, loff_t *pos)
{
struct list_head *_p;
(*pos)++;
_p = v;
_p = (v == SEQ_START_TOKEN) ? rxrpc_calls.next : _p->next;
return _p != &rxrpc_calls ? _p : NULL;
} /* end rxrpc_proc_calls_next() */
/*****************************************************************************/
/*
* clean up after reading from the calls list
*/
static void rxrpc_proc_calls_stop(struct seq_file *p, void *v)
{
up_read(&rxrpc_calls_sem);
} /* end rxrpc_proc_calls_stop() */
/*****************************************************************************/
/*
* display a header line followed by a load of call lines
*/
static int rxrpc_proc_calls_show(struct seq_file *m, void *v)
{
struct rxrpc_call *call = list_entry(v, struct rxrpc_call, call_link);
/* display header on line 1 */
if (v == SEQ_START_TOKEN) {
seq_puts(m,
"LOCAL REMOT SRVC CONN CALL DIR USE "
" L STATE OPCODE ABORT ERRNO\n"
);
return 0;
}
/* display one call per line on subsequent lines */
seq_printf(m,
"%5hu %5hu %04hx %08x %08x %s %3u%c"
" %c %-7.7s %6d %08x %5d\n",
call->conn->trans->port,
ntohs(call->conn->addr.sin_port),
ntohs(call->conn->service_id),
ntohl(call->conn->conn_id),
ntohl(call->call_id),
call->conn->service ? "SVC" : "CLT",
atomic_read(&call->usage),
waitqueue_active(&call->waitq) ? 'w' : ' ',
call->app_last_rcv ? 'Y' : '-',
(call->app_call_state!=RXRPC_CSTATE_ERROR ?
rxrpc_call_states7[call->app_call_state] :
rxrpc_call_error_states7[call->app_err_state]),
call->app_opcode,
call->app_abort_code,
call->app_errno
);
return 0;
} /* end rxrpc_proc_calls_show() */
net/rxrpc/rxrpc_syms.c deleted 100644 → 0
View file @ 08e0e7c8
/* rxrpc_syms.c: exported Rx RPC layer interface symbols
*
* Copyright (C) 2002 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/module.h>
#include <rxrpc/transport.h>
#include <rxrpc/connection.h>
#include <rxrpc/call.h>
#include <rxrpc/krxiod.h>
/* call.c */
EXPORT_SYMBOL(rxrpc_create_call);
EXPORT_SYMBOL(rxrpc_put_call);
EXPORT_SYMBOL(rxrpc_call_abort);
EXPORT_SYMBOL(rxrpc_call_read_data);
EXPORT_SYMBOL(rxrpc_call_write_data);
/* connection.c */
EXPORT_SYMBOL(rxrpc_create_connection);
EXPORT_SYMBOL(rxrpc_put_connection);
/* transport.c */
EXPORT_SYMBOL(rxrpc_create_transport);
EXPORT_SYMBOL(rxrpc_put_transport);
EXPORT_SYMBOL(rxrpc_add_service);
EXPORT_SYMBOL(rxrpc_del_service);
net/rxrpc/sysctl.c deleted 100644 → 0
View file @ 08e0e7c8
/* sysctl.c: Rx RPC control
*
* Copyright (C) 2002 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/sched.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/sysctl.h>
#include <rxrpc/types.h>
#include <rxrpc/rxrpc.h>
#include <asm/errno.h>
#include "internal.h"
int rxrpc_ktrace;
int rxrpc_kdebug;
int rxrpc_kproto;
int rxrpc_knet;
#ifdef CONFIG_SYSCTL
static struct ctl_table_header *rxrpc_sysctl = NULL;
static ctl_table rxrpc_sysctl_table[] = {
{
.ctl_name = 1,
.procname = "kdebug",
.data = &rxrpc_kdebug,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec
},
{
.ctl_name = 2,
.procname = "ktrace",
.data = &rxrpc_ktrace,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec
},
{
.ctl_name = 3,
.procname = "kproto",
.data = &rxrpc_kproto,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec
},
{
.ctl_name = 4,
.procname = "knet",
.data = &rxrpc_knet,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec
},
{
.ctl_name = 5,
.procname = "peertimo",
.data = &rxrpc_peer_timeout,
.maxlen = sizeof(unsigned long),
.mode = 0644,
.proc_handler = &proc_doulongvec_minmax
},
{
.ctl_name = 6,
.procname = "conntimo",
.data = &rxrpc_conn_timeout,
.maxlen = sizeof(unsigned long),
.mode = 0644,
.proc_handler = &proc_doulongvec_minmax
},
{ .ctl_name = 0 }
};
static ctl_table rxrpc_dir_sysctl_table[] = {
{
.ctl_name = 1,
.procname = "rxrpc",
.maxlen = 0,
.mode = 0555,
.child = rxrpc_sysctl_table
},
{ .ctl_name = 0 }
};
#endif /* CONFIG_SYSCTL */
/*****************************************************************************/
/*
* initialise the sysctl stuff for Rx RPC
*/
int rxrpc_sysctl_init(void)
{
#ifdef CONFIG_SYSCTL
rxrpc_sysctl = register_sysctl_table(rxrpc_dir_sysctl_table);
if (!rxrpc_sysctl)
return -ENOMEM;
#endif /* CONFIG_SYSCTL */
return 0;
} /* end rxrpc_sysctl_init() */
/*****************************************************************************/
/*
* clean up the sysctl stuff for Rx RPC
*/
void rxrpc_sysctl_cleanup(void)
{
#ifdef CONFIG_SYSCTL
if (rxrpc_sysctl) {
unregister_sysctl_table(rxrpc_sysctl);
rxrpc_sysctl = NULL;
}
#endif /* CONFIG_SYSCTL */
} /* end rxrpc_sysctl_cleanup() */
net/rxrpc/transport.c deleted 100644 → 0
View file @ 08e0e7c8
/* transport.c: Rx Transport routines
*
* Copyright (C) 2002 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/slab.h>
#include <linux/module.h>
#include <rxrpc/transport.h>
#include <rxrpc/peer.h>
#include <rxrpc/connection.h>
#include <rxrpc/call.h>
#include <rxrpc/message.h>
#include <rxrpc/krxiod.h>
#include <rxrpc/krxsecd.h>
#include <linux/udp.h>
#include <linux/in.h>
#include <linux/in6.h>
#include <linux/icmp.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <net/ip.h>
#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
#include <linux/ipv6.h> /* this should _really_ be in errqueue.h.. */
#endif
#include <linux/errqueue.h>
#include <asm/uaccess.h>
#include "internal.h"
struct errormsg {
struct cmsghdr cmsg; /* control message header */
struct sock_extended_err ee; /* extended error information */
struct sockaddr_in icmp_src; /* ICMP packet source address */
};
static DEFINE_SPINLOCK(rxrpc_transports_lock);
static struct list_head rxrpc_transports = LIST_HEAD_INIT(rxrpc_transports);
__RXACCT_DECL(atomic_t rxrpc_transport_count);
LIST_HEAD(rxrpc_proc_transports);
DECLARE_RWSEM(rxrpc_proc_transports_sem);
static void rxrpc_data_ready(struct sock *sk, int count);
static void rxrpc_error_report(struct sock *sk);
static int rxrpc_trans_receive_new_call(struct rxrpc_transport *trans,
struct list_head *msgq);
static void rxrpc_trans_receive_error_report(struct rxrpc_transport *trans);
/*****************************************************************************/
/*
* create a new transport endpoint using the specified UDP port
*/
int rxrpc_create_transport(unsigned short port,
struct rxrpc_transport **_trans)
{
struct rxrpc_transport *trans;
struct sockaddr_in sin;
mm_segment_t oldfs;
struct sock *sock;
int ret, opt;
_enter("%hu", port);
trans = kzalloc(sizeof(struct rxrpc_transport), GFP_KERNEL);
if (!trans)
return -ENOMEM;
atomic_set(&trans->usage, 1);
INIT_LIST_HEAD(&trans->services);
INIT_LIST_HEAD(&trans->link);
INIT_LIST_HEAD(&trans->krxiodq_link);
spin_lock_init(&trans->lock);
INIT_LIST_HEAD(&trans->peer_active);
INIT_LIST_HEAD(&trans->peer_graveyard);
spin_lock_init(&trans->peer_gylock);
init_waitqueue_head(&trans->peer_gy_waitq);
rwlock_init(&trans->peer_lock);
atomic_set(&trans->peer_count, 0);
trans->port = port;
/* create a UDP socket to be my actual transport endpoint */
ret = sock_create_kern(PF_INET, SOCK_DGRAM, IPPROTO_UDP, &trans->socket);
if (ret < 0)
goto error;
/* use the specified port */
if (port) {
memset(&sin, 0, sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_port = htons(port);
ret = trans->socket->ops->bind(trans->socket,
(struct sockaddr *) &sin,
sizeof(sin));
if (ret < 0)
goto error;
}
opt = 1;
oldfs = get_fs();
set_fs(KERNEL_DS);
ret = trans->socket->ops->setsockopt(trans->socket, SOL_IP, IP_RECVERR,
(char *) &opt, sizeof(opt));
set_fs(oldfs);
spin_lock(&rxrpc_transports_lock);
list_add(&trans->link, &rxrpc_transports);
spin_unlock(&rxrpc_transports_lock);
/* set the socket up */
sock = trans->socket->sk;
sock->sk_user_data = trans;
sock->sk_data_ready = rxrpc_data_ready;
sock->sk_error_report = rxrpc_error_report;
down_write(&rxrpc_proc_transports_sem);
list_add_tail(&trans->proc_link, &rxrpc_proc_transports);
up_write(&rxrpc_proc_transports_sem);
__RXACCT(atomic_inc(&rxrpc_transport_count));
*_trans = trans;
_leave(" = 0 (%p)", trans);
return 0;
error:
/* finish cleaning up the transport (not really needed here, but...) */
if (trans->socket)
trans->socket->ops->shutdown(trans->socket, 2);
/* close the socket */
if (trans->socket) {
trans->socket->sk->sk_user_data = NULL;
sock_release(trans->socket);
trans->socket = NULL;
}
kfree(trans);
_leave(" = %d", ret);
return ret;
} /* end rxrpc_create_transport() */
/*****************************************************************************/
/*
* destroy a transport endpoint
*/
void rxrpc_put_transport(struct rxrpc_transport *trans)
{
_enter("%p{u=%d p=%hu}",
trans, atomic_read(&trans->usage), trans->port);
BUG_ON(atomic_read(&trans->usage) <= 0);
/* to prevent a race, the decrement and the dequeue must be
* effectively atomic */
spin_lock(&rxrpc_transports_lock);
if (likely(!atomic_dec_and_test(&trans->usage))) {
spin_unlock(&rxrpc_transports_lock);
_leave("");
return;
}
list_del(&trans->link);
spin_unlock(&rxrpc_transports_lock);
/* finish cleaning up the transport */
if (trans->socket)
trans->socket->ops->shutdown(trans->socket, 2);
rxrpc_krxsecd_clear_transport(trans);
rxrpc_krxiod_dequeue_transport(trans);
/* discard all peer information */
rxrpc_peer_clearall(trans);
down_write(&rxrpc_proc_transports_sem);
list_del(&trans->proc_link);
up_write(&rxrpc_proc_transports_sem);
__RXACCT(atomic_dec(&rxrpc_transport_count));
/* close the socket */
if (trans->socket) {
trans->socket->sk->sk_user_data = NULL;
sock_release(trans->socket);
trans->socket = NULL;
}
kfree(trans);
_leave("");
} /* end rxrpc_put_transport() */
/*****************************************************************************/
/*
* add a service to a transport to be listened upon
*/
int rxrpc_add_service(struct rxrpc_transport *trans,
struct rxrpc_service *newsrv)
{
struct rxrpc_service *srv;
struct list_head *_p;
int ret = -EEXIST;
_enter("%p{%hu},%p{%hu}",
trans, trans->port, newsrv, newsrv->service_id);
/* verify that the service ID is not already present */
spin_lock(&trans->lock);
list_for_each(_p, &trans->services) {
srv = list_entry(_p, struct rxrpc_service, link);
if (srv->service_id == newsrv->service_id)
goto out;
}
/* okay - add the transport to the list */
list_add_tail(&newsrv->link, &trans->services);
rxrpc_get_transport(trans);
ret = 0;
out:
spin_unlock(&trans->lock);
_leave("= %d", ret);
return ret;
} /* end rxrpc_add_service() */
/*****************************************************************************/
/*
* remove a service from a transport
*/
void rxrpc_del_service(struct rxrpc_transport *trans, struct rxrpc_service *srv)
{
_enter("%p{%hu},%p{%hu}", trans, trans->port, srv, srv->service_id);
spin_lock(&trans->lock);
list_del(&srv->link);
spin_unlock(&trans->lock);
rxrpc_put_transport(trans);
_leave("");
} /* end rxrpc_del_service() */
/*****************************************************************************/
/*
* INET callback when data has been received on the socket.
*/
static void rxrpc_data_ready(struct sock *sk, int count)
{
struct rxrpc_transport *trans;
_enter("%p{t=%p},%d", sk, sk->sk_user_data, count);
/* queue the transport for attention by krxiod */
trans = (struct rxrpc_transport *) sk->sk_user_data;
if (trans)
rxrpc_krxiod_queue_transport(trans);
/* wake up anyone waiting on the socket */
if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
wake_up_interruptible(sk->sk_sleep);
_leave("");
} /* end rxrpc_data_ready() */
/*****************************************************************************/
/*
* INET callback when an ICMP error packet is received
* - sk->err is error (EHOSTUNREACH, EPROTO or EMSGSIZE)
*/
static void rxrpc_error_report(struct sock *sk)
{
struct rxrpc_transport *trans;
_enter("%p{t=%p}", sk, sk->sk_user_data);
/* queue the transport for attention by krxiod */
trans = (struct rxrpc_transport *) sk->sk_user_data;
if (trans) {
trans->error_rcvd = 1;
rxrpc_krxiod_queue_transport(trans);
}
/* wake up anyone waiting on the socket */
if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
wake_up_interruptible(sk->sk_sleep);
_leave("");
} /* end rxrpc_error_report() */
/*****************************************************************************/
/*
* split a message up, allocating message records and filling them in
* from the contents of a socket buffer
*/
static int rxrpc_incoming_msg(struct rxrpc_transport *trans,
struct sk_buff *pkt,
struct list_head *msgq)
{
struct rxrpc_message *msg;
int ret;
_enter("");
msg = kzalloc(sizeof(struct rxrpc_message), GFP_KERNEL);
if (!msg) {
_leave(" = -ENOMEM");
return -ENOMEM;
}
atomic_set(&msg->usage, 1);
list_add_tail(&msg->link,msgq);
/* dig out the Rx routing parameters */
if (skb_copy_bits(pkt, sizeof(struct udphdr),
&msg->hdr, sizeof(msg->hdr)) < 0) {
ret = -EBADMSG;
goto error;
}
msg->trans = trans;
msg->state = RXRPC_MSG_RECEIVED;
skb_get_timestamp(pkt, &msg->stamp);
if (msg->stamp.tv_sec == 0) {
do_gettimeofday(&msg->stamp);
if (pkt->sk)
sock_enable_timestamp(pkt->sk);
}
msg->seq = ntohl(msg->hdr.seq);
/* attach the packet */
skb_get(pkt);
msg->pkt = pkt;
msg->offset = sizeof(struct udphdr) + sizeof(struct rxrpc_header);
msg->dsize = msg->pkt->len - msg->offset;
_net("Rx Received packet from %s (%08x;%08x,%1x,%d,%s,%02x,%d,%d)",
msg->hdr.flags & RXRPC_CLIENT_INITIATED ? "client" : "server",
ntohl(msg->hdr.epoch),
(ntohl(msg->hdr.cid) & RXRPC_CIDMASK) >> RXRPC_CIDSHIFT,
ntohl(msg->hdr.cid) & RXRPC_CHANNELMASK,
ntohl(msg->hdr.callNumber),
rxrpc_pkts[msg->hdr.type],
msg->hdr.flags,
ntohs(msg->hdr.serviceId),
msg->hdr.securityIndex);
__RXACCT(atomic_inc(&rxrpc_message_count));
/* split off jumbo packets */
while (msg->hdr.type == RXRPC_PACKET_TYPE_DATA &&
msg->hdr.flags & RXRPC_JUMBO_PACKET
) {
struct rxrpc_jumbo_header jumbo;
struct rxrpc_message *jumbomsg = msg;
_debug("split jumbo packet");
/* quick sanity check */
ret = -EBADMSG;
if (msg->dsize <
RXRPC_JUMBO_DATALEN + sizeof(struct rxrpc_jumbo_header))
goto error;
if (msg->hdr.flags & RXRPC_LAST_PACKET)
goto error;
/* dig out the secondary header */
if (skb_copy_bits(pkt, msg->offset + RXRPC_JUMBO_DATALEN,
&jumbo, sizeof(jumbo)) < 0)
goto error;
/* allocate a new message record */
ret = -ENOMEM;
msg = kmemdup(jumbomsg, sizeof(struct rxrpc_message), GFP_KERNEL);
if (!msg)
goto error;
list_add_tail(&msg->link, msgq);
/* adjust the jumbo packet */
jumbomsg->dsize = RXRPC_JUMBO_DATALEN;
/* attach the packet here too */
skb_get(pkt);
/* adjust the parameters */
msg->seq++;
msg->hdr.seq = htonl(msg->seq);
msg->hdr.serial = htonl(ntohl(msg->hdr.serial) + 1);
msg->offset += RXRPC_JUMBO_DATALEN +
sizeof(struct rxrpc_jumbo_header);
msg->dsize -= RXRPC_JUMBO_DATALEN +
sizeof(struct rxrpc_jumbo_header);
msg->hdr.flags = jumbo.flags;
msg->hdr._rsvd = jumbo._rsvd;
_net("Rx Split jumbo packet from %s"
" (%08x;%08x,%1x,%d,%s,%02x,%d,%d)",
msg->hdr.flags & RXRPC_CLIENT_INITIATED ? "client" : "server",
ntohl(msg->hdr.epoch),
(ntohl(msg->hdr.cid) & RXRPC_CIDMASK) >> RXRPC_CIDSHIFT,
ntohl(msg->hdr.cid) & RXRPC_CHANNELMASK,
ntohl(msg->hdr.callNumber),
rxrpc_pkts[msg->hdr.type],
msg->hdr.flags,
ntohs(msg->hdr.serviceId),
msg->hdr.securityIndex);
__RXACCT(atomic_inc(&rxrpc_message_count));
}
_leave(" = 0 #%d", atomic_read(&rxrpc_message_count));
return 0;
error:
while (!list_empty(msgq)) {
msg = list_entry(msgq->next, struct rxrpc_message, link);
list_del_init(&msg->link);
rxrpc_put_message(msg);
}
_leave(" = %d", ret);
return ret;
} /* end rxrpc_incoming_msg() */
/*****************************************************************************/
/*
* accept a new call
* - called from krxiod in process context
*/
void rxrpc_trans_receive_packet(struct rxrpc_transport *trans)
{
struct rxrpc_message *msg;
struct rxrpc_peer *peer;
struct sk_buff *pkt;
int ret;
__be32 addr;
__be16 port;
LIST_HEAD(msgq);
_enter("%p{%d}", trans, trans->port);
for (;;) {
/* deal with outstanting errors first */
if (trans->error_rcvd)
rxrpc_trans_receive_error_report(trans);
/* attempt to receive a packet */
pkt = skb_recv_datagram(trans->socket->sk, 0, 1, &ret);
if (!pkt) {
if (ret == -EAGAIN) {
_leave(" EAGAIN");
return;
}
/* an icmp error may have occurred */
rxrpc_krxiod_queue_transport(trans);
_leave(" error %d\n", ret);
return;
}
/* we'll probably need to checksum it (didn't call
* sock_recvmsg) */
if (skb_checksum_complete(pkt)) {
kfree_skb(pkt);
rxrpc_krxiod_queue_transport(trans);
_leave(" CSUM failed");
return;
}
addr = ip_hdr(pkt)->saddr;
port = udp_hdr(pkt)->source;
_net("Rx Received UDP packet from %08x:%04hu",
ntohl(addr), ntohs(port));
/* unmarshall the Rx parameters and split jumbo packets */
ret = rxrpc_incoming_msg(trans, pkt, &msgq);
if (ret < 0) {
kfree_skb(pkt);
rxrpc_krxiod_queue_transport(trans);
_leave(" bad packet");
return;
}
BUG_ON(list_empty(&msgq));
msg = list_entry(msgq.next, struct rxrpc_message, link);
/* locate the record for the peer from which it
* originated */
ret = rxrpc_peer_lookup(trans, addr, &peer);
if (ret < 0) {
kdebug("Rx No connections from that peer");
rxrpc_trans_immediate_abort(trans, msg, -EINVAL);
goto finished_msg;
}
/* try and find a matching connection */
ret = rxrpc_connection_lookup(peer, msg, &msg->conn);
if (ret < 0) {
kdebug("Rx Unknown Connection");
rxrpc_trans_immediate_abort(trans, msg, -EINVAL);
rxrpc_put_peer(peer);
goto finished_msg;
}
rxrpc_put_peer(peer);
/* deal with the first packet of a new call */
if (msg->hdr.flags & RXRPC_CLIENT_INITIATED &&
msg->hdr.type == RXRPC_PACKET_TYPE_DATA &&
ntohl(msg->hdr.seq) == 1
) {
_debug("Rx New server call");
rxrpc_trans_receive_new_call(trans, &msgq);
goto finished_msg;
}
/* deal with subsequent packet(s) of call */
_debug("Rx Call packet");
while (!list_empty(&msgq)) {
msg = list_entry(msgq.next, struct rxrpc_message, link);
list_del_init(&msg->link);
ret = rxrpc_conn_receive_call_packet(msg->conn, NULL, msg);
if (ret < 0) {
rxrpc_trans_immediate_abort(trans, msg, ret);
rxrpc_put_message(msg);
goto finished_msg;
}
rxrpc_put_message(msg);
}
goto finished_msg;
/* dispose of the packets */
finished_msg:
while (!list_empty(&msgq)) {
msg = list_entry(msgq.next, struct rxrpc_message, link);
list_del_init(&msg->link);
rxrpc_put_message(msg);
}
kfree_skb(pkt);
}
_leave("");
} /* end rxrpc_trans_receive_packet() */
/*****************************************************************************/
/*
* accept a new call from a client trying to connect to one of my services
* - called in process context
*/
static int rxrpc_trans_receive_new_call(struct rxrpc_transport *trans,
struct list_head *msgq)
{
struct rxrpc_message *msg;
_enter("");
/* only bother with the first packet */
msg = list_entry(msgq->next, struct rxrpc_message, link);
list_del_init(&msg->link);
rxrpc_krxsecd_queue_incoming_call(msg);
rxrpc_put_message(msg);
_leave(" = 0");
return 0;
} /* end rxrpc_trans_receive_new_call() */
/*****************************************************************************/
/*
* perform an immediate abort without connection or call structures
*/
int rxrpc_trans_immediate_abort(struct rxrpc_transport *trans,
struct rxrpc_message *msg,
int error)
{
struct rxrpc_header ahdr;
struct sockaddr_in sin;
struct msghdr msghdr;
struct kvec iov[2];
__be32 _error;
int len, ret;
_enter("%p,%p,%d", trans, msg, error);
/* don't abort an abort packet */
if (msg->hdr.type == RXRPC_PACKET_TYPE_ABORT) {
_leave(" = 0");
return 0;
}
_error = htonl(-error);
/* set up the message to be transmitted */
memcpy(&ahdr, &msg->hdr, sizeof(ahdr));
ahdr.epoch = msg->hdr.epoch;
ahdr.serial = htonl(1);
ahdr.seq = 0;
ahdr.type = RXRPC_PACKET_TYPE_ABORT;
ahdr.flags = RXRPC_LAST_PACKET;
ahdr.flags |= ~msg->hdr.flags & RXRPC_CLIENT_INITIATED;
iov[0].iov_len = sizeof(ahdr);
iov[0].iov_base = &ahdr;
iov[1].iov_len = sizeof(_error);
iov[1].iov_base = &_error;
len = sizeof(ahdr) + sizeof(_error);
memset(&sin,0,sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_port = udp_hdr(msg->pkt)->source;
sin.sin_addr.s_addr = ip_hdr(msg->pkt)->saddr;
msghdr.msg_name = &sin;
msghdr.msg_namelen = sizeof(sin);
msghdr.msg_control = NULL;
msghdr.msg_controllen = 0;
msghdr.msg_flags = MSG_DONTWAIT;
_net("Sending message type %d of %d bytes to %08x:%d",
ahdr.type,
len,
ntohl(sin.sin_addr.s_addr),
ntohs(sin.sin_port));
/* send the message */
ret = kernel_sendmsg(trans->socket, &msghdr, iov, 2, len);
_leave(" = %d", ret);
return ret;
} /* end rxrpc_trans_immediate_abort() */
/*****************************************************************************/
/*
* receive an ICMP error report and percolate it to all connections
* heading to the affected host or port
*/
static void rxrpc_trans_receive_error_report(struct rxrpc_transport *trans)
{
struct rxrpc_connection *conn;
struct sockaddr_in sin;
struct rxrpc_peer *peer;
struct list_head connq, *_p;
struct errormsg emsg;
struct msghdr msg;
__be16 port;
int local, err;
_enter("%p", trans);
for (;;) {
trans->error_rcvd = 0;
/* try and receive an error message */
msg.msg_name = &sin;
msg.msg_namelen = sizeof(sin);
msg.msg_control = &emsg;
msg.msg_controllen = sizeof(emsg);
msg.msg_flags = 0;
err = kernel_recvmsg(trans->socket, &msg, NULL, 0, 0,
MSG_ERRQUEUE | MSG_DONTWAIT | MSG_TRUNC);
if (err == -EAGAIN) {
_leave("");
return;
}
if (err < 0) {
printk("%s: unable to recv an error report: %d\n",
__FUNCTION__, err);
_leave("");
return;
}
msg.msg_controllen = (char *) msg.msg_control - (char *) &emsg;
if (msg.msg_controllen < sizeof(emsg.cmsg) ||
msg.msg_namelen < sizeof(sin)) {
printk("%s: short control message"
" (nlen=%u clen=%Zu fl=%x)\n",
__FUNCTION__,
msg.msg_namelen,
msg.msg_controllen,
msg.msg_flags);
continue;
}
_net("Rx Received control message"
" { len=%Zu level=%u type=%u }",
emsg.cmsg.cmsg_len,
emsg.cmsg.cmsg_level,
emsg.cmsg.cmsg_type);
if (sin.sin_family != AF_INET) {
printk("Rx Ignoring error report with non-INET address"
" (fam=%u)",
sin.sin_family);
continue;
}
_net("Rx Received message pertaining to host addr=%x port=%hu",
ntohl(sin.sin_addr.s_addr), ntohs(sin.sin_port));
if (emsg.cmsg.cmsg_level != SOL_IP ||
emsg.cmsg.cmsg_type != IP_RECVERR) {
printk("Rx Ignoring unknown error report"
" { level=%u type=%u }",
emsg.cmsg.cmsg_level,
emsg.cmsg.cmsg_type);
continue;
}
if (msg.msg_controllen < sizeof(emsg.cmsg) + sizeof(emsg.ee)) {
printk("%s: short error message (%Zu)\n",
__FUNCTION__, msg.msg_controllen);
_leave("");
return;
}
port = sin.sin_port;
switch (emsg.ee.ee_origin) {
case SO_EE_ORIGIN_ICMP:
local = 0;
switch (emsg.ee.ee_type) {
case ICMP_DEST_UNREACH:
switch (emsg.ee.ee_code) {
case ICMP_NET_UNREACH:
_net("Rx Received ICMP Network Unreachable");
port = 0;
err = -ENETUNREACH;
break;
case ICMP_HOST_UNREACH:
_net("Rx Received ICMP Host Unreachable");
port = 0;
err = -EHOSTUNREACH;
break;
case ICMP_PORT_UNREACH:
_net("Rx Received ICMP Port Unreachable");
err = -ECONNREFUSED;
break;
case ICMP_NET_UNKNOWN:
_net("Rx Received ICMP Unknown Network");
port = 0;
err = -ENETUNREACH;
break;
case ICMP_HOST_UNKNOWN:
_net("Rx Received ICMP Unknown Host");
port = 0;
err = -EHOSTUNREACH;
break;
default:
_net("Rx Received ICMP DestUnreach { code=%u }",
emsg.ee.ee_code);
err = emsg.ee.ee_errno;
break;
}
break;
case ICMP_TIME_EXCEEDED:
_net("Rx Received ICMP TTL Exceeded");
err = emsg.ee.ee_errno;
break;
default:
_proto("Rx Received ICMP error { type=%u code=%u }",
emsg.ee.ee_type, emsg.ee.ee_code);
err = emsg.ee.ee_errno;
break;
}
break;
case SO_EE_ORIGIN_LOCAL:
_proto("Rx Received local error { error=%d }",
emsg.ee.ee_errno);
local = 1;
err = emsg.ee.ee_errno;
break;
case SO_EE_ORIGIN_NONE:
case SO_EE_ORIGIN_ICMP6:
default:
_proto("Rx Received error report { orig=%u }",
emsg.ee.ee_origin);
local = 0;
err = emsg.ee.ee_errno;
break;
}
/* find all the connections between this transport and the
* affected destination */
INIT_LIST_HEAD(&connq);
if (rxrpc_peer_lookup(trans, sin.sin_addr.s_addr,
&peer) == 0) {
read_lock(&peer->conn_lock);
list_for_each(_p, &peer->conn_active) {
conn = list_entry(_p, struct rxrpc_connection,
link);
if (port && conn->addr.sin_port != port)
continue;
if (!list_empty(&conn->err_link))
continue;
rxrpc_get_connection(conn);
list_add_tail(&conn->err_link, &connq);
}
read_unlock(&peer->conn_lock);
/* service all those connections */
while (!list_empty(&connq)) {
conn = list_entry(connq.next,
struct rxrpc_connection,
err_link);
list_del(&conn->err_link);
rxrpc_conn_handle_error(conn, local, err);
rxrpc_put_connection(conn);
}
rxrpc_put_peer(peer);
}
}
_leave("");
return;
} /* end rxrpc_trans_receive_error_report() */
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