linux_dsm_epyc7002/drivers/infiniband/hw/nes/nes_cm.h
Faisal Latif c5a7d48971 RDMA/nes: Fix crash in nes_accept()
While running IMP_EXT's window test, we saw a crash in nes_accept().
Here is the sequence of what happened:

(1) In MVAPICH2, connect request is received for port #0.

FIX:  Add a nes_connect() check to make sure local or remote tcp port
      is not 0.

(2) Remote node's (passive) TCP stack sends a reset when it gets a
    connect request because of port = 0.  Active side set the connect
    error to IW_CM_EVENT_STATUS_REJECTED when it received the RST from
    remote node.

FIX: The corect error code is -ECONNRESET.

(3) Wrong error code of IW_CM_EVENT_STATUS_REJECTED causes the core to
    destroy its listener ports.  Here there are connections that may
    have sent an MPA request up and waiting for accept or reject.  But
    the listener and its cm_nodes have been freed already causing the
    crash noticed.

FIX: The cm_node is freed only if its state is not
     NES_CM_STATE_MPAREQ_RCVD.  If cm_node's state is
     NES_CM_STATE_MPAREQ_RCVD then its new state is set to
     NES_CM_STATE_LISTENER_DESTROYED and it is not freed.  When
     nes_accept() or nes_reject() is received, its state is checked
     for NES_CM_STATE_LISTENER_DESTROYED and in this case the cm_node
     is freed and error is returned.

Signed-off-by: Faisal Latif <faisal.latif@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2009-12-09 15:54:08 -08:00

427 lines
11 KiB
C

/*
* Copyright (c) 2006 - 2009 Intel Corporation. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#ifndef NES_CM_H
#define NES_CM_H
#define QUEUE_EVENTS
#define NES_MANAGE_APBVT_DEL 0
#define NES_MANAGE_APBVT_ADD 1
#define NES_MPA_REQUEST_ACCEPT 1
#define NES_MPA_REQUEST_REJECT 2
/* IETF MPA -- defines, enums, structs */
#define IEFT_MPA_KEY_REQ "MPA ID Req Frame"
#define IEFT_MPA_KEY_REP "MPA ID Rep Frame"
#define IETF_MPA_KEY_SIZE 16
#define IETF_MPA_VERSION 1
#define IETF_MAX_PRIV_DATA_LEN 512
#define IETF_MPA_FRAME_SIZE 20
enum ietf_mpa_flags {
IETF_MPA_FLAGS_MARKERS = 0x80, /* receive Markers */
IETF_MPA_FLAGS_CRC = 0x40, /* receive Markers */
IETF_MPA_FLAGS_REJECT = 0x20, /* Reject */
};
struct ietf_mpa_frame {
u8 key[IETF_MPA_KEY_SIZE];
u8 flags;
u8 rev;
__be16 priv_data_len;
u8 priv_data[0];
};
#define ietf_mpa_req_resp_frame ietf_mpa_frame
struct nes_v4_quad {
u32 rsvd0;
__le32 DstIpAdrIndex; /* Only most significant 5 bits are valid */
__be32 SrcIpadr;
__be16 TcpPorts[2]; /* src is low, dest is high */
};
struct nes_cm_node;
enum nes_timer_type {
NES_TIMER_TYPE_SEND,
NES_TIMER_TYPE_RECV,
NES_TIMER_NODE_CLEANUP,
NES_TIMER_TYPE_CLOSE,
};
#define NES_PASSIVE_STATE_INDICATED 0
#define NES_DO_NOT_SEND_RESET_EVENT 1
#define NES_SEND_RESET_EVENT 2
#define MAX_NES_IFS 4
#define SET_ACK 1
#define SET_SYN 2
#define SET_FIN 4
#define SET_RST 8
#define TCP_OPTIONS_PADDING 3
struct option_base {
u8 optionnum;
u8 length;
};
enum option_numbers {
OPTION_NUMBER_END,
OPTION_NUMBER_NONE,
OPTION_NUMBER_MSS,
OPTION_NUMBER_WINDOW_SCALE,
OPTION_NUMBER_SACK_PERM,
OPTION_NUMBER_SACK,
OPTION_NUMBER_WRITE0 = 0xbc
};
struct option_mss {
u8 optionnum;
u8 length;
__be16 mss;
};
struct option_windowscale {
u8 optionnum;
u8 length;
u8 shiftcount;
};
union all_known_options {
char as_end;
struct option_base as_base;
struct option_mss as_mss;
struct option_windowscale as_windowscale;
};
struct nes_timer_entry {
struct list_head list;
unsigned long timetosend; /* jiffies */
struct sk_buff *skb;
u32 type;
u32 retrycount;
u32 retranscount;
u32 context;
u32 seq_num;
u32 send_retrans;
int close_when_complete;
struct net_device *netdev;
};
#define NES_DEFAULT_RETRYS 64
#define NES_DEFAULT_RETRANS 8
#ifdef CONFIG_INFINIBAND_NES_DEBUG
#define NES_RETRY_TIMEOUT (1000*HZ/1000)
#else
#define NES_RETRY_TIMEOUT (3000*HZ/1000)
#endif
#define NES_SHORT_TIME (10)
#define NES_LONG_TIME (2000*HZ/1000)
#define NES_MAX_TIMEOUT ((unsigned long) (12*HZ))
#define NES_CM_HASHTABLE_SIZE 1024
#define NES_CM_TCP_TIMER_INTERVAL 3000
#define NES_CM_DEFAULT_MTU 1540
#define NES_CM_DEFAULT_FRAME_CNT 10
#define NES_CM_THREAD_STACK_SIZE 256
#define NES_CM_DEFAULT_RCV_WND 64240 // before we know that window scaling is allowed
#define NES_CM_DEFAULT_RCV_WND_SCALED 256960 // after we know that window scaling is allowed
#define NES_CM_DEFAULT_RCV_WND_SCALE 2
#define NES_CM_DEFAULT_FREE_PKTS 0x000A
#define NES_CM_FREE_PKT_LO_WATERMARK 2
#define NES_CM_DEFAULT_MSS 536
#define NES_CM_DEF_SEQ 0x159bf75f
#define NES_CM_DEF_LOCAL_ID 0x3b47
#define NES_CM_DEF_SEQ2 0x18ed5740
#define NES_CM_DEF_LOCAL_ID2 0xb807
#define MAX_CM_BUFFER (IETF_MPA_FRAME_SIZE + IETF_MAX_PRIV_DATA_LEN)
typedef u32 nes_addr_t;
#define nes_cm_tsa_context nes_qp_context
struct nes_qp;
/* cm node transition states */
enum nes_cm_node_state {
NES_CM_STATE_UNKNOWN,
NES_CM_STATE_INITED,
NES_CM_STATE_LISTENING,
NES_CM_STATE_SYN_RCVD,
NES_CM_STATE_SYN_SENT,
NES_CM_STATE_ONE_SIDE_ESTABLISHED,
NES_CM_STATE_ESTABLISHED,
NES_CM_STATE_ACCEPTING,
NES_CM_STATE_MPAREQ_SENT,
NES_CM_STATE_MPAREQ_RCVD,
NES_CM_STATE_MPAREJ_RCVD,
NES_CM_STATE_TSA,
NES_CM_STATE_FIN_WAIT1,
NES_CM_STATE_FIN_WAIT2,
NES_CM_STATE_CLOSE_WAIT,
NES_CM_STATE_TIME_WAIT,
NES_CM_STATE_LAST_ACK,
NES_CM_STATE_CLOSING,
NES_CM_STATE_LISTENER_DESTROYED,
NES_CM_STATE_CLOSED
};
enum nes_tcpip_pkt_type {
NES_PKT_TYPE_UNKNOWN,
NES_PKT_TYPE_SYN,
NES_PKT_TYPE_SYNACK,
NES_PKT_TYPE_ACK,
NES_PKT_TYPE_FIN,
NES_PKT_TYPE_RST
};
/* type of nes connection */
enum nes_cm_conn_type {
NES_CM_IWARP_CONN_TYPE,
};
/* CM context params */
struct nes_cm_tcp_context {
u8 client;
u32 loc_seq_num;
u32 loc_ack_num;
u32 rem_ack_num;
u32 rcv_nxt;
u32 loc_id;
u32 rem_id;
u32 snd_wnd;
u32 max_snd_wnd;
u32 rcv_wnd;
u32 mss;
u8 snd_wscale;
u8 rcv_wscale;
struct nes_cm_tsa_context tsa_cntxt;
struct timeval sent_ts;
};
enum nes_cm_listener_state {
NES_CM_LISTENER_PASSIVE_STATE=1,
NES_CM_LISTENER_ACTIVE_STATE=2,
NES_CM_LISTENER_EITHER_STATE=3
};
struct nes_cm_listener {
struct list_head list;
struct nes_cm_core *cm_core;
u8 loc_mac[ETH_ALEN];
nes_addr_t loc_addr;
u16 loc_port;
struct iw_cm_id *cm_id;
enum nes_cm_conn_type conn_type;
atomic_t ref_count;
struct nes_vnic *nesvnic;
atomic_t pend_accepts_cnt;
int backlog;
enum nes_cm_listener_state listener_state;
u32 reused_node;
};
/* per connection node and node state information */
struct nes_cm_node {
nes_addr_t loc_addr, rem_addr;
u16 loc_port, rem_port;
u8 loc_mac[ETH_ALEN];
u8 rem_mac[ETH_ALEN];
enum nes_cm_node_state state;
struct nes_cm_tcp_context tcp_cntxt;
struct nes_cm_core *cm_core;
struct sk_buff_head resend_list;
atomic_t ref_count;
struct net_device *netdev;
struct nes_cm_node *loopbackpartner;
struct nes_timer_entry *send_entry;
spinlock_t retrans_list_lock;
struct nes_timer_entry *recv_entry;
int send_write0;
union {
struct ietf_mpa_frame mpa_frame;
u8 mpa_frame_buf[MAX_CM_BUFFER];
};
u16 mpa_frame_size;
struct iw_cm_id *cm_id;
struct list_head list;
int accelerated;
struct nes_cm_listener *listener;
enum nes_cm_conn_type conn_type;
struct nes_vnic *nesvnic;
int apbvt_set;
int accept_pend;
struct list_head timer_entry;
struct list_head reset_entry;
struct nes_qp *nesqp;
atomic_t passive_state;
};
/* structure for client or CM to fill when making CM api calls. */
/* - only need to set relevant data, based on op. */
struct nes_cm_info {
union {
struct iw_cm_id *cm_id;
struct net_device *netdev;
};
u16 loc_port;
u16 rem_port;
nes_addr_t loc_addr;
nes_addr_t rem_addr;
enum nes_cm_conn_type conn_type;
int backlog;
};
/* CM event codes */
enum nes_cm_event_type {
NES_CM_EVENT_UNKNOWN,
NES_CM_EVENT_ESTABLISHED,
NES_CM_EVENT_MPA_REQ,
NES_CM_EVENT_MPA_CONNECT,
NES_CM_EVENT_MPA_ACCEPT,
NES_CM_EVENT_MPA_REJECT,
NES_CM_EVENT_MPA_ESTABLISHED,
NES_CM_EVENT_CONNECTED,
NES_CM_EVENT_CLOSED,
NES_CM_EVENT_RESET,
NES_CM_EVENT_DROPPED_PKT,
NES_CM_EVENT_CLOSE_IMMED,
NES_CM_EVENT_CLOSE_HARD,
NES_CM_EVENT_CLOSE_CLEAN,
NES_CM_EVENT_ABORTED,
NES_CM_EVENT_SEND_FIRST
};
/* event to post to CM event handler */
struct nes_cm_event {
enum nes_cm_event_type type;
struct nes_cm_info cm_info;
struct work_struct event_work;
struct nes_cm_node *cm_node;
};
struct nes_cm_core {
enum nes_cm_node_state state;
atomic_t listen_node_cnt;
struct nes_cm_node listen_list;
spinlock_t listen_list_lock;
u32 mtu;
u32 free_tx_pkt_max;
u32 rx_pkt_posted;
atomic_t ht_node_cnt;
struct list_head connected_nodes;
/* struct list_head hashtable[NES_CM_HASHTABLE_SIZE]; */
spinlock_t ht_lock;
struct timer_list tcp_timer;
struct nes_cm_ops *api;
int (*post_event)(struct nes_cm_event *event);
atomic_t events_posted;
struct workqueue_struct *event_wq;
struct workqueue_struct *disconn_wq;
atomic_t node_cnt;
u64 aborted_connects;
u32 options;
struct nes_cm_node *current_listen_node;
};
#define NES_CM_SET_PKT_SIZE (1 << 1)
#define NES_CM_SET_FREE_PKT_Q_SIZE (1 << 2)
/* CM ops/API for client interface */
struct nes_cm_ops {
int (*accelerated)(struct nes_cm_core *, struct nes_cm_node *);
struct nes_cm_listener * (*listen)(struct nes_cm_core *, struct nes_vnic *,
struct nes_cm_info *);
int (*stop_listener)(struct nes_cm_core *, struct nes_cm_listener *);
struct nes_cm_node * (*connect)(struct nes_cm_core *,
struct nes_vnic *, u16, void *,
struct nes_cm_info *);
int (*close)(struct nes_cm_core *, struct nes_cm_node *);
int (*accept)(struct nes_cm_core *, struct ietf_mpa_frame *,
struct nes_cm_node *);
int (*reject)(struct nes_cm_core *, struct ietf_mpa_frame *,
struct nes_cm_node *);
int (*recv_pkt)(struct nes_cm_core *, struct nes_vnic *,
struct sk_buff *);
int (*destroy_cm_core)(struct nes_cm_core *);
int (*get)(struct nes_cm_core *);
int (*set)(struct nes_cm_core *, u32, u32);
};
int schedule_nes_timer(struct nes_cm_node *, struct sk_buff *,
enum nes_timer_type, int, int);
int nes_accept(struct iw_cm_id *, struct iw_cm_conn_param *);
int nes_reject(struct iw_cm_id *, const void *, u8);
int nes_connect(struct iw_cm_id *, struct iw_cm_conn_param *);
int nes_create_listen(struct iw_cm_id *, int);
int nes_destroy_listen(struct iw_cm_id *);
int nes_cm_recv(struct sk_buff *, struct net_device *);
int nes_cm_start(void);
int nes_cm_stop(void);
#endif /* NES_CM_H */