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Make HA peers announce their parameters on connect.

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HA protocol requires strict version, parameters and configuration match.
Differences there may cause full set of problems up to kernel panic.
To avoid that, validate peer parameters on connect, and abort connection
immediately if some mismatch detected.
This commit is contained in:
mav 2015-09-23 15:49:27 +00:00
parent 93991d4618
commit 6711ffe0ce
4 changed files with 99 additions and 7 deletions
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46
sys/cam/ctl/ctl.c
View File

@ -715,8 +715,20 @@ ctl_isc_ha_link_up(struct ctl_softc *softc)
{
struct ctl_port *port;
struct ctl_lun *lun;
union ctl_ha_msg msg;
int i;
/* Announce this node parameters to peer for validation. */
msg.login.msg_type = CTL_MSG_LOGIN;
msg.login.version = CTL_HA_VERSION;
msg.login.ha_mode = softc->ha_mode;
msg.login.ha_id = softc->ha_id;
msg.login.max_luns = CTL_MAX_LUNS;
msg.login.max_ports = CTL_MAX_PORTS;
msg.login.max_init_per_port = CTL_MAX_INIT_PER_PORT;
ctl_ha_msg_send(CTL_HA_CHAN_CTL, &msg.login, sizeof(msg.login),
M_WAITOK);
STAILQ_FOREACH(port, &softc->port_list, links) {
ctl_isc_announce_port(port);
for (i = 0; i < CTL_MAX_INIT_PER_PORT; i++) {
@ -999,6 +1011,36 @@ ctl_isc_iid_sync(struct ctl_softc *softc, union ctl_ha_msg *msg, int len)
port->wwpn_iid[iid].name = NULL;
}
static void
ctl_isc_login(struct ctl_softc *softc, union ctl_ha_msg *msg, int len)
{
if (msg->login.version != CTL_HA_VERSION) {
printf("CTL HA peers have different versions %d != %d\n",
msg->login.version, CTL_HA_VERSION);
ctl_ha_msg_abort(CTL_HA_CHAN_CTL);
return;
}
if (msg->login.ha_mode != softc->ha_mode) {
printf("CTL HA peers have different ha_mode %d != %d\n",
msg->login.ha_mode, softc->ha_mode);
ctl_ha_msg_abort(CTL_HA_CHAN_CTL);
return;
}
if (msg->login.ha_id == softc->ha_id) {
printf("CTL HA peers have same ha_id %d\n", msg->login.ha_id);
ctl_ha_msg_abort(CTL_HA_CHAN_CTL);
return;
}
if (msg->login.max_luns != CTL_MAX_LUNS ||
msg->login.max_ports != CTL_MAX_PORTS ||
msg->login.max_init_per_port != CTL_MAX_INIT_PER_PORT) {
printf("CTL HA peers have different limits\n");
ctl_ha_msg_abort(CTL_HA_CHAN_CTL);
return;
}
}
/*
* ISC (Inter Shelf Communication) event handler. Events from the HA
* subsystem come in here.
@ -1275,9 +1317,13 @@ ctl_isc_event_handler(ctl_ha_channel channel, ctl_ha_event event, int param)
case CTL_MSG_IID_SYNC:
ctl_isc_iid_sync(softc, msg, param);
break;
case CTL_MSG_LOGIN:
ctl_isc_login(softc, msg, param);
break;
default:
printf("Received HA message of unknown type %d\n",
msg->hdr.msg_type);
ctl_ha_msg_abort(CTL_HA_CHAN_CTL);
break;
}
if (msg != &msgbuf)

35
sys/cam/ctl/ctl_ha.c
View File

@ -283,8 +283,9 @@ ctl_ha_rx_thread(void *arg)
else
next = sizeof(wire_hdr);
SOCKBUF_LOCK(&so->so_rcv);
while (sbavail(&so->so_rcv) < next) {
if (softc->ha_connected == 0 || so->so_error ||
while (sbavail(&so->so_rcv) < next || softc->ha_disconnect) {
if (softc->ha_connected == 0 || softc->ha_disconnect ||
so->so_error ||
(so->so_rcv.sb_state & SBS_CANTRCVMORE)) {
goto errout;
}
@ -541,6 +542,18 @@ ctl_ha_listen(struct ha_softc *softc)
printf("%s: REUSEADDR setting failed %d\n",
__func__, error);
}
bzero(&opt, sizeof(struct sockopt));
opt.sopt_dir = SOPT_SET;
opt.sopt_level = SOL_SOCKET;
opt.sopt_name = SO_REUSEPORT;
opt.sopt_val = &val;
opt.sopt_valsize = sizeof(val);
val = 1;
error = sosetopt(softc->ha_lso, &opt);
if (error) {
printf("%s: REUSEPORT setting failed %d\n",
__func__, error);
}
SOCKBUF_LOCK(&softc->ha_lso->so_rcv);
soupcall_set(softc->ha_lso, SO_RCV, ctl_ha_lupcall, softc);
SOCKBUF_UNLOCK(&softc->ha_lso->so_rcv);
@ -572,7 +585,8 @@ ctl_ha_conn_thread(void *arg)
while (1) {
if (softc->ha_disconnect || softc->ha_shutdown) {
ctl_ha_close(softc);
ctl_ha_lclose(softc);
if (softc->ha_disconnect == 2 || softc->ha_shutdown)
ctl_ha_lclose(softc);
softc->ha_disconnect = 0;
if (softc->ha_shutdown)
break;
@ -666,7 +680,7 @@ ctl_ha_peer_sysctl(SYSCTL_HANDLER_ARGS)
sa->sin_addr.s_addr =
htonl((b1 << 24) + (b2 << 16) + (b3 << 8) + b4);
}
softc->ha_disconnect = 1;
softc->ha_disconnect = 2;
softc->ha_wakeup = 1;
mtx_unlock(&softc->ha_lock);
wakeup(&softc->ha_wakeup);
@ -811,6 +825,19 @@ ctl_ha_msg_send(ctl_ha_channel channel, const void *addr, size_t len,
return (ctl_ha_msg_send2(channel, addr, len, NULL, 0, wait));
}
ctl_ha_status
ctl_ha_msg_abort(ctl_ha_channel channel)
{
struct ha_softc *softc = &ha_softc;
mtx_lock(&softc->ha_lock);
softc->ha_disconnect = 1;
softc->ha_wakeup = 1;
mtx_unlock(&softc->ha_lock);
wakeup(&softc->ha_wakeup);
return (CTL_HA_STATUS_SUCCESS);
}
/*
* Allocate a data transfer request structure.
*/

1
sys/cam/ctl/ctl_ha.h
View File

@ -125,6 +125,7 @@ ctl_ha_status ctl_ha_msg_send(ctl_ha_channel channel, const void *addr,
size_t len, int wait);
ctl_ha_status ctl_ha_msg_send2(ctl_ha_channel channel, const void *addr,
size_t len, const void *addr2, size_t len2, int wait);
ctl_ha_status ctl_ha_msg_abort(ctl_ha_channel channel);
ctl_ha_status ctl_ha_msg_deregister(ctl_ha_channel channel);
struct ctl_ha_dt_req * ctl_dt_req_alloc(void);

24
sys/cam/ctl/ctl_io.h
View File

@ -197,6 +197,7 @@ typedef enum {
CTL_MSG_PORT_SYNC, /* Information about port. */
CTL_MSG_LUN_SYNC, /* Information about LUN. */
CTL_MSG_IID_SYNC, /* Information about initiator. */
CTL_MSG_LOGIN, /* Information about HA peer. */
CTL_MSG_FAILOVER /* Fake, never sent though the wire */
} ctl_msg_type;
@ -358,6 +359,25 @@ struct ctl_taskio {
uint8_t task_resp[3];/* Response information */
};
/*
* HA link messages.
*/
#define CTL_HA_VERSION 1
/*
* Used for CTL_MSG_LOGIN.
*/
struct ctl_ha_msg_login {
ctl_msg_type msg_type;
int version;
int ha_mode;
int ha_id;
int max_luns;
int max_ports;
int max_init_per_port;
};
typedef enum {
CTL_PR_REG_KEY,
CTL_PR_UNREG_KEY,
@ -523,16 +543,14 @@ union ctl_ha_msg {
struct ctl_ha_msg_port port;
struct ctl_ha_msg_lun lun;
struct ctl_ha_msg_iid iid;
struct ctl_ha_msg_login login;
};
struct ctl_prio {
struct ctl_io_hdr io_hdr;
struct ctl_ha_msg_pr pr_msg;
};
union ctl_io {
struct ctl_io_hdr io_hdr; /* common to all I/O types */
struct ctl_scsiio scsiio; /* Normal SCSI commands */