Delete the old RxRPC code as it's now no longer used.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
If unsure, say N.
-
-config RXRPC
- tristate
-
config 9P_FS
tristate "Plan 9 Resource Sharing Support (9P2000) (Experimental)"
depends on INET && EXPERIMENTAL
+++ /dev/null
-/* 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 */
+++ /dev/null
-/* 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 */
+++ /dev/null
-/* 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 */
+++ /dev/null
-/* 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 */
+++ /dev/null
-/* 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 */
+++ /dev/null
-/* 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 */
/* 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
#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 */
* - 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) */
* 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 */
+++ /dev/null
-/* 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 */
+++ /dev/null
-/* 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 */
+++ /dev/null
-/* 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 */
#
-# Makefile for Linux kernel Rx RPC
+# Makefile for Linux kernel RxRPC
#
-#CFLAGS += -finstrument-functions
-
af-rxrpc-objs := \
af_rxrpc.o \
ar-accept.o \
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
+++ /dev/null
-/* 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() */
+++ /dev/null
-/* 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() */
+++ /dev/null
-/* 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(¤t->sighand->siglock);
- dequeue_signal(current, ¤t->blocked, &sinfo);
- spin_unlock_irq(¤t->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 */
+++ /dev/null
-/* 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() */
+++ /dev/null
-/* 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() */
+++ /dev/null
-/* 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() */
+++ /dev/null
-/* 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
+++ /dev/null
-/* 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() */
+++ /dev/null
-/* 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() */
+++ /dev/null
-/* 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);
+++ /dev/null
-/* 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() */
+++ /dev/null
-/* 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() */
git://ftp.safe.ca / safe / jmp / linux-2.6 / commitdiff