diff options
Diffstat (limited to 'drivers/char/ipmi/ipmi_msghandler.c')
| -rw-r--r-- | drivers/char/ipmi/ipmi_msghandler.c | 211 |
1 files changed, 184 insertions, 27 deletions
diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c index e93fc8d22fb2..aa83a0865ec1 100644 --- a/drivers/char/ipmi/ipmi_msghandler.c +++ b/drivers/char/ipmi/ipmi_msghandler.c @@ -285,6 +285,11 @@ enum ipmi_stat_indexes { /* Events that were received with the proper format. */ IPMI_STAT_events, + /* Retransmissions on IPMB that failed. */ + IPMI_STAT_dropped_rexmit_ipmb_commands, + + /* Retransmissions on LAN that failed. */ + IPMI_STAT_dropped_rexmit_lan_commands, /* This *must* remain last, add new values above this. */ IPMI_NUM_STATS @@ -445,6 +450,20 @@ static DEFINE_MUTEX(smi_watchers_mutex); #define ipmi_get_stat(intf, stat) \ ((unsigned int) atomic_read(&(intf)->stats[IPMI_STAT_ ## stat])) +static int is_lan_addr(struct ipmi_addr *addr) +{ + return addr->addr_type == IPMI_LAN_ADDR_TYPE; +} + +static int is_ipmb_addr(struct ipmi_addr *addr) +{ + return addr->addr_type == IPMI_IPMB_ADDR_TYPE; +} + +static int is_ipmb_bcast_addr(struct ipmi_addr *addr) +{ + return addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE; +} static void free_recv_msg_list(struct list_head *q) { @@ -601,8 +620,7 @@ ipmi_addr_equal(struct ipmi_addr *addr1, struct ipmi_addr *addr2) return (smi_addr1->lun == smi_addr2->lun); } - if ((addr1->addr_type == IPMI_IPMB_ADDR_TYPE) - || (addr1->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) { + if (is_ipmb_addr(addr1) || is_ipmb_bcast_addr(addr1)) { struct ipmi_ipmb_addr *ipmb_addr1 = (struct ipmi_ipmb_addr *) addr1; struct ipmi_ipmb_addr *ipmb_addr2 @@ -612,7 +630,7 @@ ipmi_addr_equal(struct ipmi_addr *addr1, struct ipmi_addr *addr2) && (ipmb_addr1->lun == ipmb_addr2->lun)); } - if (addr1->addr_type == IPMI_LAN_ADDR_TYPE) { + if (is_lan_addr(addr1)) { struct ipmi_lan_addr *lan_addr1 = (struct ipmi_lan_addr *) addr1; struct ipmi_lan_addr *lan_addr2 @@ -644,14 +662,13 @@ int ipmi_validate_addr(struct ipmi_addr *addr, int len) || (addr->channel < 0)) return -EINVAL; - if ((addr->addr_type == IPMI_IPMB_ADDR_TYPE) - || (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) { + if (is_ipmb_addr(addr) || is_ipmb_bcast_addr(addr)) { if (len < sizeof(struct ipmi_ipmb_addr)) return -EINVAL; return 0; } - if (addr->addr_type == IPMI_LAN_ADDR_TYPE) { + if (is_lan_addr(addr)) { if (len < sizeof(struct ipmi_lan_addr)) return -EINVAL; return 0; @@ -1503,8 +1520,7 @@ static int i_ipmi_request(ipmi_user_t user, memcpy(&(smi_msg->data[2]), msg->data, msg->data_len); smi_msg->data_size = msg->data_len + 2; ipmi_inc_stat(intf, sent_local_commands); - } else if ((addr->addr_type == IPMI_IPMB_ADDR_TYPE) - || (addr->addr_type == IPMI_IPMB_BROADCAST_ADDR_TYPE)) { + } else if (is_ipmb_addr(addr) || is_ipmb_bcast_addr(addr)) { struct ipmi_ipmb_addr *ipmb_addr; unsigned char ipmb_seq; long seqid; @@ -1583,8 +1599,6 @@ static int i_ipmi_request(ipmi_user_t user, spin_lock_irqsave(&(intf->seq_lock), flags); - ipmi_inc_stat(intf, sent_ipmb_commands); - /* * Create a sequence number with a 1 second * timeout and 4 retries. @@ -1606,6 +1620,8 @@ static int i_ipmi_request(ipmi_user_t user, goto out_err; } + ipmi_inc_stat(intf, sent_ipmb_commands); + /* * Store the sequence number in the message, * so that when the send message response @@ -1635,7 +1651,7 @@ static int i_ipmi_request(ipmi_user_t user, */ spin_unlock_irqrestore(&(intf->seq_lock), flags); } - } else if (addr->addr_type == IPMI_LAN_ADDR_TYPE) { + } else if (is_lan_addr(addr)) { struct ipmi_lan_addr *lan_addr; unsigned char ipmb_seq; long seqid; @@ -1696,8 +1712,6 @@ static int i_ipmi_request(ipmi_user_t user, spin_lock_irqsave(&(intf->seq_lock), flags); - ipmi_inc_stat(intf, sent_lan_commands); - /* * Create a sequence number with a 1 second * timeout and 4 retries. @@ -1719,6 +1733,8 @@ static int i_ipmi_request(ipmi_user_t user, goto out_err; } + ipmi_inc_stat(intf, sent_lan_commands); + /* * Store the sequence number in the message, * so that when the send message response @@ -1937,6 +1953,10 @@ static int stat_file_read_proc(char *page, char **start, off_t off, ipmi_get_stat(intf, invalid_events)); out += sprintf(out, "events: %u\n", ipmi_get_stat(intf, events)); + out += sprintf(out, "failed rexmit LAN msgs: %u\n", + ipmi_get_stat(intf, dropped_rexmit_lan_commands)); + out += sprintf(out, "failed rexmit IPMB msgs: %u\n", + ipmi_get_stat(intf, dropped_rexmit_ipmb_commands)); return (out - ((char *) page)); } @@ -3264,6 +3284,114 @@ static int handle_lan_get_msg_cmd(ipmi_smi_t intf, return rv; } +/* + * This routine will handle "Get Message" command responses with + * channels that use an OEM Medium. The message format belongs to + * the OEM. See IPMI 2.0 specification, Chapter 6 and + * Chapter 22, sections 22.6 and 22.24 for more details. + */ +static int handle_oem_get_msg_cmd(ipmi_smi_t intf, + struct ipmi_smi_msg *msg) +{ + struct cmd_rcvr *rcvr; + int rv = 0; + unsigned char netfn; + unsigned char cmd; + unsigned char chan; + ipmi_user_t user = NULL; + struct ipmi_system_interface_addr *smi_addr; + struct ipmi_recv_msg *recv_msg; + + /* + * We expect the OEM SW to perform error checking + * so we just do some basic sanity checks + */ + if (msg->rsp_size < 4) { + /* Message not big enough, just ignore it. */ + ipmi_inc_stat(intf, invalid_commands); + return 0; + } + + if (msg->rsp[2] != 0) { + /* An error getting the response, just ignore it. */ + return 0; + } + + /* + * This is an OEM Message so the OEM needs to know how + * handle the message. We do no interpretation. + */ + netfn = msg->rsp[0] >> 2; + cmd = msg->rsp[1]; + chan = msg->rsp[3] & 0xf; + + rcu_read_lock(); + rcvr = find_cmd_rcvr(intf, netfn, cmd, chan); + if (rcvr) { + user = rcvr->user; + kref_get(&user->refcount); + } else + user = NULL; + rcu_read_unlock(); + + if (user == NULL) { + /* We didn't find a user, just give up. */ + ipmi_inc_stat(intf, unhandled_commands); + + /* + * Don't do anything with these messages, just allow + * them to be freed. + */ + + rv = 0; + } else { + /* Deliver the message to the user. */ + ipmi_inc_stat(intf, handled_commands); + + recv_msg = ipmi_alloc_recv_msg(); + if (!recv_msg) { + /* + * We couldn't allocate memory for the + * message, so requeue it for handling + * later. + */ + rv = 1; + kref_put(&user->refcount, free_user); + } else { + /* + * OEM Messages are expected to be delivered via + * the system interface to SMS software. We might + * need to visit this again depending on OEM + * requirements + */ + smi_addr = ((struct ipmi_system_interface_addr *) + &(recv_msg->addr)); + smi_addr->addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; + smi_addr->channel = IPMI_BMC_CHANNEL; + smi_addr->lun = msg->rsp[0] & 3; + + recv_msg->user = user; + recv_msg->user_msg_data = NULL; + recv_msg->recv_type = IPMI_OEM_RECV_TYPE; + recv_msg->msg.netfn = msg->rsp[0] >> 2; + recv_msg->msg.cmd = msg->rsp[1]; + recv_msg->msg.data = recv_msg->msg_data; + + /* + * The message starts at byte 4 which follows the + * the Channel Byte in the "GET MESSAGE" command + */ + recv_msg->msg.data_len = msg->rsp_size - 4; + memcpy(recv_msg->msg_data, + &(msg->rsp[4]), + msg->rsp_size - 4); + deliver_response(recv_msg); + } + } + + return rv; +} + static void copy_event_into_recv_msg(struct ipmi_recv_msg *recv_msg, struct ipmi_smi_msg *msg) { @@ -3519,6 +3647,17 @@ static int handle_new_recv_msg(ipmi_smi_t intf, goto out; } + /* + ** We need to make sure the channels have been initialized. + ** The channel_handler routine will set the "curr_channel" + ** equal to or greater than IPMI_MAX_CHANNELS when all the + ** channels for this interface have been initialized. + */ + if (intf->curr_channel < IPMI_MAX_CHANNELS) { + requeue = 1; /* Just put the message back for now */ + goto out; + } + switch (intf->channels[chan].medium) { case IPMI_CHANNEL_MEDIUM_IPMB: if (msg->rsp[4] & 0x04) { @@ -3554,11 +3693,20 @@ static int handle_new_recv_msg(ipmi_smi_t intf, break; default: - /* - * We don't handle the channel type, so just - * free the message. - */ - requeue = 0; + /* Check for OEM Channels. Clients had better + register for these commands. */ + if ((intf->channels[chan].medium + >= IPMI_CHANNEL_MEDIUM_OEM_MIN) + && (intf->channels[chan].medium + <= IPMI_CHANNEL_MEDIUM_OEM_MAX)) { + requeue = handle_oem_get_msg_cmd(intf, msg); + } else { + /* + * We don't handle the channel type, so just + * free the message. + */ + requeue = 0; + } } } else if ((msg->rsp[0] == ((IPMI_NETFN_APP_REQUEST|1) << 2)) @@ -3730,7 +3878,7 @@ static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent, list_add_tail(&msg->link, timeouts); if (ent->broadcast) ipmi_inc_stat(intf, timed_out_ipmb_broadcasts); - else if (ent->recv_msg->addr.addr_type == IPMI_LAN_ADDR_TYPE) + else if (is_lan_addr(&ent->recv_msg->addr)) ipmi_inc_stat(intf, timed_out_lan_commands); else ipmi_inc_stat(intf, timed_out_ipmb_commands); @@ -3744,15 +3892,17 @@ static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent, */ ent->timeout = MAX_MSG_TIMEOUT; ent->retries_left--; - if (ent->recv_msg->addr.addr_type == IPMI_LAN_ADDR_TYPE) - ipmi_inc_stat(intf, retransmitted_lan_commands); - else - ipmi_inc_stat(intf, retransmitted_ipmb_commands); - smi_msg = smi_from_recv_msg(intf, ent->recv_msg, slot, ent->seqid); - if (!smi_msg) + if (!smi_msg) { + if (is_lan_addr(&ent->recv_msg->addr)) + ipmi_inc_stat(intf, + dropped_rexmit_lan_commands); + else + ipmi_inc_stat(intf, + dropped_rexmit_ipmb_commands); return; + } spin_unlock_irqrestore(&intf->seq_lock, *flags); @@ -3764,10 +3914,17 @@ static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent, * resent. */ handlers = intf->handlers; - if (handlers) + if (handlers) { + if (is_lan_addr(&ent->recv_msg->addr)) + ipmi_inc_stat(intf, + retransmitted_lan_commands); + else + ipmi_inc_stat(intf, + retransmitted_ipmb_commands); + intf->handlers->sender(intf->send_info, smi_msg, 0); - else + } else ipmi_free_smi_msg(smi_msg); spin_lock_irqsave(&intf->seq_lock, *flags); |
