/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include "mpd_defs.h"
#include "mpd_tables.h"
/*
* Global list of phyints, phyint instances, phyint groups and the anonymous
* group; the latter is initialized in phyint_init().
*/
struct phyint *phyints = NULL;
struct phyint_instance *phyint_instances = NULL;
struct phyint_group *phyint_groups = NULL;
struct phyint_group *phyint_anongroup;
/*
* Grouplist signature; initialized in phyint_init().
*/
static uint64_t phyint_grouplistsig;
static void phyint_inst_insert(struct phyint_instance *pii);
static void phyint_inst_print(struct phyint_instance *pii);
static void phyint_insert(struct phyint *pi, struct phyint_group *pg);
static void phyint_delete(struct phyint *pi);
static void phyint_group_insert(struct phyint_group *pg);
static void phyint_group_delete(struct phyint_group *pg);
static struct phyint_group *phyint_group_lookup(const char *pg_name);
static struct phyint_group *phyint_group_create(const char *pg_name);
static void logint_print(struct logint *li);
static void logint_insert(struct phyint_instance *pii, struct logint *li);
static struct logint *logint_lookup(struct phyint_instance *pii, char *li_name);
static void target_print(struct target *tg);
static void target_insert(struct phyint_instance *pii, struct target *tg);
static struct target *target_first(struct phyint_instance *pii);
static struct target *target_select_best(struct phyint_instance *pii);
static void target_flush_hosts(struct phyint_group *pg);
static void reset_pii_probes(struct phyint_instance *pii, struct target *tg);
static boolean_t phyint_inst_v6_sockinit(struct phyint_instance *pii);
static boolean_t phyint_inst_v4_sockinit(struct phyint_instance *pii);
static void ip_index_to_mask_v6(uint_t masklen, struct in6_addr *bitmask);
static boolean_t prefix_equal(struct in6_addr p1, struct in6_addr p2,
int prefix_len);
static int phyint_state_event(struct phyint_group *pg, struct phyint *pi);
static int phyint_group_state_event(struct phyint_group *pg);
static int phyint_group_change_event(struct phyint_group *pg, ipmp_group_op_t);
static int phyint_group_member_event(struct phyint_group *pg, struct phyint *pi,
ipmp_if_op_t op);
static uint64_t gensig(void);
/* Initialize any per-file global state. Returns 0 on success, -1 on failure */
int
phyint_init(void)
{
phyint_grouplistsig = gensig();
if (track_all_phyints) {
phyint_anongroup = phyint_group_create("");
if (phyint_anongroup == NULL)
return (-1);
phyint_group_insert(phyint_anongroup);
}
return (0);
}
/* Return the phyint with the given name */
struct phyint *
phyint_lookup(const char *name)
{
struct phyint *pi;
if (debug & D_PHYINT)
logdebug("phyint_lookup(%s)\n", name);
for (pi = phyints; pi != NULL; pi = pi->pi_next) {
if (strncmp(pi->pi_name, name, sizeof (pi->pi_name)) == 0)
break;
}
return (pi);
}
/* Return the phyint instance with the given name and the given family */
struct phyint_instance *
phyint_inst_lookup(int af, char *name)
{
struct phyint *pi;
if (debug & D_PHYINT)
logdebug("phyint_inst_lookup(%s %s)\n", AF_STR(af), name);
assert(af == AF_INET || af == AF_INET6);
pi = phyint_lookup(name);
if (pi == NULL)
return (NULL);
return (PHYINT_INSTANCE(pi, af));
}
static struct phyint_group *
phyint_group_lookup(const char *pg_name)
{
struct phyint_group *pg;
if (debug & D_PHYINT)
logdebug("phyint_group_lookup(%s)\n", pg_name);
for (pg = phyint_groups; pg != NULL; pg = pg->pg_next) {
if (strncmp(pg->pg_name, pg_name, sizeof (pg->pg_name)) == 0)
break;
}
return (pg);
}
/*
* Insert the phyint in the linked list of all phyints. If the phyint belongs
* to some group, insert it in the phyint group list.
*/
static void
phyint_insert(struct phyint *pi, struct phyint_group *pg)
{
if (debug & D_PHYINT)
logdebug("phyint_insert(%s '%s')\n", pi->pi_name, pg->pg_name);
/* Insert the phyint at the head of the 'all phyints' list */
pi->pi_next = phyints;
pi->pi_prev = NULL;
if (phyints != NULL)
phyints->pi_prev = pi;
phyints = pi;
/*
* Insert the phyint at the head of the 'phyint_group members' list
* of the phyint group to which it belongs.
*/
pi->pi_pgnext = NULL;
pi->pi_pgprev = NULL;
pi->pi_group = pg;
pi->pi_pgnext = pg->pg_phyint;
if (pi->pi_pgnext != NULL)
pi->pi_pgnext->pi_pgprev = pi;
pg->pg_phyint = pi;
pg->pg_sig++;
(void) phyint_group_member_event(pg, pi, IPMP_IF_ADD);
}
/* Insert the phyint instance in the linked list of all phyint instances. */
static void
phyint_inst_insert(struct phyint_instance *pii)
{
if (debug & D_PHYINT) {
logdebug("phyint_inst_insert(%s %s)\n",
AF_STR(pii->pii_af), pii->pii_name);
}
/*
* Insert the phyint at the head of the 'all phyint instances' list.
*/
pii->pii_next = phyint_instances;
pii->pii_prev = NULL;
if (phyint_instances != NULL)
phyint_instances->pii_prev = pii;
phyint_instances = pii;
}
/*
* Create a new phyint with the given parameters. Also insert it into
* the list of all phyints and the list of phyint group members by calling
* phyint_insert().
*/
static struct phyint *
phyint_create(char *pi_name, struct phyint_group *pg, uint_t ifindex,
uint64_t flags)
{
struct phyint *pi;
pi = calloc(1, sizeof (struct phyint));
if (pi == NULL) {
logperror("phyint_create: calloc");
return (NULL);
}
/*
* Record the phyint values. Also insert the phyint into the
* phyint group by calling phyint_insert().
*/
(void) strlcpy(pi->pi_name, pi_name, sizeof (pi->pi_name));
pi->pi_taddrthresh = getcurrentsec() + TESTADDR_CONF_TIME;
pi->pi_ifindex = ifindex;
pi->pi_icmpid =
htons(((getpid() & 0xFF) << 8) | (pi->pi_ifindex & 0xFF));
/*
* We optimistically start in the PI_RUNNING state. Later (in
* process_link_state_changes()), we will readjust this to match the
* current state of the link. Further, if test addresses are
* subsequently assigned, we will transition to PI_NOTARGETS and then
* either PI_RUNNING or PI_FAILED, depending on the result of the test
* probes.
*/
pi->pi_state = PI_RUNNING;
pi->pi_flags = PHYINT_FLAGS(flags);
/*
* Initialise the link state. The link state is initialised to
* up, so that if the link is down when IPMP starts monitoring
* the interface, it will appear as though there has been a
* transition from the link up to link down. This avoids
* having to treat this situation as a special case.
*/
INIT_LINK_STATE(pi);
/*
* Insert the phyint in the list of all phyints, and the
* list of phyint group members
*/
phyint_insert(pi, pg);
/*
* If we are joining a failed group, mark the interface as
* failed.
*/
if (GROUP_FAILED(pg))
(void) change_lif_flags(pi, IFF_FAILED, _B_TRUE);
return (pi);
}
/*
* Create a new phyint instance belonging to the phyint 'pi' and address
* family 'af'. Also insert it into the list of all phyint instances by
* calling phyint_inst_insert().
*/
static struct phyint_instance *
phyint_inst_create(struct phyint *pi, int af)
{
struct phyint_instance *pii;
pii = calloc(1, sizeof (struct phyint_instance));
if (pii == NULL) {
logperror("phyint_inst_create: calloc");
return (NULL);
}
/*
* Attach the phyint instance to the phyint.
* Set the back pointers as well
*/
pii->pii_phyint = pi;
if (af == AF_INET)
pi->pi_v4 = pii;
else
pi->pi_v6 = pii;
pii->pii_in_use = 1;
pii->pii_probe_sock = -1;
pii->pii_snxt = 1;
pii->pii_af = af;
pii->pii_fd_hrtime = gethrtime() +
(FAILURE_DETECTION_QP * (hrtime_t)NANOSEC);
pii->pii_flags = pi->pi_flags;
/* Insert the phyint instance in the list of all phyint instances. */
phyint_inst_insert(pii);
return (pii);
}
/*
* Change the state of phyint `pi' to state `state'.
*/
void
phyint_chstate(struct phyint *pi, enum pi_state state)
{
/*
* To simplify things, some callers always set a given state
* regardless of the previous state of the phyint (e.g., setting
* PI_RUNNING when it's already set). We shouldn't bother
* generating an event or consuming a signature for these, since
* the actual state of the interface is unchanged.
*/
if (pi->pi_state == state)
return;
pi->pi_state = state;
pi->pi_group->pg_sig++;
(void) phyint_state_event(pi->pi_group, pi);
}
/*
* Note that the type of phyint `pi' has changed.
*/
void
phyint_newtype(struct phyint *pi)
{
pi->pi_group->pg_sig++;
(void) phyint_state_event(pi->pi_group, pi);
}
/*
* Insert the phyint group in the linked list of all phyint groups
* at the head of the list
*/
static void
phyint_group_insert(struct phyint_group *pg)
{
pg->pg_next = phyint_groups;
pg->pg_prev = NULL;
if (phyint_groups != NULL)
phyint_groups->pg_prev = pg;
phyint_groups = pg;
phyint_grouplistsig++;
(void) phyint_group_change_event(pg, IPMP_GROUP_ADD);
}
/*
* Create a new phyint group called 'name'.
*/
static struct phyint_group *
phyint_group_create(const char *name)
{
struct phyint_group *pg;
if (debug & D_PHYINT)
logdebug("phyint_group_create(%s)\n", name);
pg = calloc(1, sizeof (struct phyint_group));
if (pg == NULL) {
logperror("phyint_group_create: calloc");
return (NULL);
}
(void) strlcpy(pg->pg_name, name, sizeof (pg->pg_name));
pg->pg_sig = gensig();
pg->pg_fdt = user_failure_detection_time;
pg->pg_probeint = user_probe_interval;
return (pg);
}
/*
* Change the state of the phyint group `pg' to state `state'.
*/
void
phyint_group_chstate(struct phyint_group *pg, enum pg_state state)
{
assert(pg != phyint_anongroup);
switch (state) {
case PG_FAILED:
pg->pg_groupfailed = 1;
/*
* We can never know with certainty that a group has
* failed. It is possible that all known targets have
* failed simultaneously, and new targets have come up
* instead. If the targets are routers then router
* discovery will kick in, and we will see the new routers
* thru routing socket messages. But if the targets are
* hosts, we have to discover it by multicast. So flush
* all the host targets. The next probe will send out a
* multicast echo request. If this is a group failure, we
* will still not see any response, otherwise we will
* clear the pg_groupfailed flag after we get
* NUM_PROBE_REPAIRS consecutive unicast replies on any
* phyint.
*/
target_flush_hosts(pg);
break;
case PG_RUNNING:
pg->pg_groupfailed = 0;
break;
default:
logerr("phyint_group_chstate: invalid group state %d; "
"aborting\n", state);
abort();
}
pg->pg_sig++;
(void) phyint_group_state_event(pg);
}
/*
* Create a new phyint instance and initialize it from the values supplied by
* the kernel. Always check for ENXIO before logging any error, because the
* interface could have vanished after completion of SIOCGLIFCONF.
* Return values:
* pointer to the phyint instance on success
* NULL on failure Eg. if the phyint instance is not found in the kernel
*/
struct phyint_instance *
phyint_inst_init_from_k(int af, char *pi_name)
{
char pg_name[LIFNAMSIZ + 1];
int ifsock;
uint_t ifindex;
uint64_t flags;
struct lifreq lifr;
struct phyint *pi;
struct phyint_instance *pii;
boolean_t pg_created;
boolean_t pi_created;
struct phyint_group *pg;
retry:
pii = NULL;
pi = NULL;
pg = NULL;
pi_created = _B_FALSE;
pg_created = _B_FALSE;
if (debug & D_PHYINT) {
logdebug("phyint_inst_init_from_k(%s %s)\n",
AF_STR(af), pi_name);
}
assert(af == AF_INET || af == AF_INET6);
/* Get the socket for doing ioctls */
ifsock = (af == AF_INET) ? ifsock_v4 : ifsock_v6;
/*
* Get the interface flags. Ignore loopback and multipoint
* interfaces.
*/
(void) strncpy(lifr.lifr_name, pi_name, sizeof (lifr.lifr_name));
lifr.lifr_name[sizeof (lifr.lifr_name) - 1] = '\0';
if (ioctl(ifsock, SIOCGLIFFLAGS, (char *)&lifr) < 0) {
if (errno != ENXIO) {
logperror("phyint_inst_init_from_k:"
" ioctl (get flags)");
}
return (NULL);
}
flags = lifr.lifr_flags;
if (!(flags & IFF_MULTICAST) || (flags & IFF_LOOPBACK))
return (NULL);
/*
* Get the ifindex for recording later in our tables, in case we need
* to create a new phyint.
*/
if (ioctl(ifsock, SIOCGLIFINDEX, (char *)&lifr) < 0) {
if (errno != ENXIO) {
logperror("phyint_inst_init_from_k: "
" ioctl (get lifindex)");
}
return (NULL);
}
ifindex = lifr.lifr_index;
/*
* Get the phyint group name of this phyint, from the kernel.
*/
if (ioctl(ifsock, SIOCGLIFGROUPNAME, (char *)&lifr) < 0) {
if (errno != ENXIO) {
logperror("phyint_inst_init_from_k: "
"ioctl (get group name)");
}
return (NULL);
}
(void) strncpy(pg_name, lifr.lifr_groupname, sizeof (pg_name));
pg_name[sizeof (pg_name) - 1] = '\0';
/*
* If the phyint is not part of any group, pg_name is the
* null string. If 'track_all_phyints' is false, there is no
* need to create a phyint.
*/
if (pg_name[0] == '\0' && !track_all_phyints) {
/*
* If the IFF_FAILED or IFF_OFFLINE flags are set, reset
* them. These flags shouldn't be set if IPMP isn't
* tracking the interface.
*/
if ((flags & (IFF_FAILED | IFF_OFFLINE)) != 0) {
lifr.lifr_flags = flags & ~(IFF_FAILED | IFF_OFFLINE);
if (ioctl(ifsock, SIOCSLIFFLAGS, (char *)&lifr) < 0) {
if (errno != ENXIO) {
logperror("phyint_inst_init_from_k:"
" ioctl (set flags)");
}
}
}
return (NULL);
}
/*
* We need to create a new phyint instance. A phyint instance
* belongs to a phyint, and the phyint belongs to a phyint group.
* So we first lookup the 'parents' and if they don't exist then
* we create them.
*/
pg = phyint_group_lookup(pg_name);
if (pg == NULL) {
pg = phyint_group_create(pg_name);
if (pg == NULL) {
logerr("phyint_inst_init_from_k:"
" unable to create group %s\n", pg_name);
return (NULL);
}
phyint_group_insert(pg);
pg_created = _B_TRUE;
}
/*
* Lookup the phyint. If the phyint does not exist create it.
*/
pi = phyint_lookup(pi_name);
if (pi == NULL) {
pi = phyint_create(pi_name, pg, ifindex, flags);
if (pi == NULL) {
logerr("phyint_inst_init_from_k:"
" unable to create phyint %s\n", pi_name);
if (pg_created)
phyint_group_delete(pg);
return (NULL);
}
pi_created = _B_TRUE;
} else {
/* The phyint exists already. */
assert(pi_created == _B_FALSE);
/*
* Normally we should see consistent values for the IPv4 and
* IPv6 instances, for phyint properties. If we don't, it
* means things have changed underneath us, and we should
* resync our tables with the kernel. Check whether the
* interface index has changed. If so, it is most likely
* the interface has been unplumbed and replumbed,
* while we are yet to update our tables. Do it now.
*/
if (pi->pi_ifindex != ifindex) {
if (pg_created)
phyint_group_delete(pg);
phyint_inst_delete(PHYINT_INSTANCE(pi, AF_OTHER(af)));
goto retry;
}
assert(PHYINT_INSTANCE(pi, af) == NULL);
/*
* If the group name seen by the IPv4 and IPv6 instances
* are different, it is most likely the groupname has
* changed, while we are yet to update our tables. Do it now.
*/
if (strcmp(pi->pi_group->pg_name, pg_name) != 0) {
if (pg_created)
phyint_group_delete(pg);
restore_phyint(pi);
phyint_inst_delete(PHYINT_INSTANCE(pi,
AF_OTHER(af)));
goto retry;
}
}
/*
* Create a new phyint instance, corresponding to the 'af'
* passed in.
*/
pii = phyint_inst_create(pi, af);
if (pii == NULL) {
logerr("phyint_inst_init_from_k: unable to create"
"phyint inst %s\n", pi->pi_name);
if (pi_created) {
/*
* Deleting the phyint will delete the phyint group
* if this is the last phyint in the group.
*/
phyint_delete(pi);
}
return (NULL);
}
return (pii);
}
/*
* Bind pii_probe_sock to the address associated with pii_probe_logint.
* This socket will be used for sending and receiving ICMP/ICMPv6 probes to
* targets. Do the common part in this function, and complete the
* initializations by calling the protocol specific functions
* phyint_inst_v{4,6}_sockinit() respectively.
*
* Return values: _B_TRUE/_B_FALSE for success or failure respectively.
*/
boolean_t
phyint_inst_sockinit(struct phyint_instance *pii)
{
boolean_t success;
struct phyint_group *pg;
if (debug & D_PHYINT) {
logdebug("phyint_inst_sockinit(%s %s)\n",
AF_STR(pii->pii_af), pii->pii_name);
}
assert(pii->pii_probe_logint != NULL);
assert(pii->pii_probe_logint->li_flags & IFF_UP);
assert(pii->pii_probe_logint->li_flags & IFF_NOFAILOVER);
assert(pii->pii_af == AF_INET || pii->pii_af == AF_INET6);
/*
* If the socket is already bound, close pii_probe_sock
*/
if (pii->pii_probe_sock != -1)
close_probe_socket(pii, _B_TRUE);
/*
* If the phyint is not part of a named group and track_all_phyints is
* false, simply return.
*/
pg = pii->pii_phyint->pi_group;
if (pg == phyint_anongroup && !track_all_phyints) {
if (debug & D_PHYINT)
logdebug("phyint_inst_sockinit: no group\n");
return (_B_FALSE);
}
/*
* Initialize the socket by calling the protocol specific function.
* If it succeeds, add the socket to the poll list.
*/
if (pii->pii_af == AF_INET6)
success = phyint_inst_v6_sockinit(pii);
else
success = phyint_inst_v4_sockinit(pii);
if (success && (poll_add(pii->pii_probe_sock) == 0))
return (_B_TRUE);
/* Something failed, cleanup and return false */
if (pii->pii_probe_sock != -1)
close_probe_socket(pii, _B_FALSE);
return (_B_FALSE);
}
/*
* IPv6 specific part in initializing the pii_probe_sock. This socket is
* used to send/receive ICMPv6 probe packets.
*/
static boolean_t
phyint_inst_v6_sockinit(struct phyint_instance *pii)
{
icmp6_filter_t filter;
int hopcount = 1;
int int_op;
struct sockaddr_in6 testaddr;
/*
* Open a raw socket with ICMPv6 protocol.
*
* Use IPV6_DONTFAILOVER_IF to make sure that probes go out
* on the specified phyint only, and are not subject to load
* balancing. Bind to the src address chosen will ensure that
* the responses are received only on the specified phyint.
*
* Set the hopcount to 1 so that probe packets are not routed.
* Disable multicast loopback. Set the receive filter to
* receive only ICMPv6 echo replies.
*/
pii->pii_probe_sock = socket(pii->pii_af, SOCK_RAW, IPPROTO_ICMPV6);
if (pii->pii_probe_sock < 0) {
logperror_pii(pii, "phyint_inst_v6_sockinit: socket");
return (_B_FALSE);
}
bzero(&testaddr, sizeof (testaddr));
testaddr.sin6_family = AF_INET6;
testaddr.sin6_port = 0;
testaddr.sin6_addr = pii->pii_probe_logint->li_addr;
if (bind(pii->pii_probe_sock, (struct sockaddr *)&testaddr,
sizeof (testaddr)) < 0) {
logperror_pii(pii, "phyint_inst_v6_sockinit: IPv6 bind");
return (_B_FALSE);
}
/*
* IPV6_DONTFAILOVER_IF option takes precedence over setting
* IP_MULTICAST_IF. So we don't set IPV6_MULTICAST_IF again.
*/
if (setsockopt(pii->pii_probe_sock, IPPROTO_IPV6, IPV6_DONTFAILOVER_IF,
(char *)&pii->pii_ifindex, sizeof (uint_t)) < 0) {
logperror_pii(pii, "phyint_inst_v6_sockinit: setsockopt"
" IPV6_DONTFAILOVER_IF");
return (_B_FALSE);
}
if (setsockopt(pii->pii_probe_sock, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
(char *)&hopcount, sizeof (hopcount)) < 0) {
logperror_pii(pii, "phyint_inst_v6_sockinit: setsockopt"
" IPV6_UNICAST_HOPS");
return (_B_FALSE);
}
if (setsockopt(pii->pii_probe_sock, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
(char *)&hopcount, sizeof (hopcount)) < 0) {
logperror_pii(pii, "phyint_inst_v6_sockinit: setsockopt"
" IPV6_MULTICAST_HOPS");
return (_B_FALSE);
}
int_op = 0; /* used to turn off option */
if (setsockopt(pii->pii_probe_sock, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
(char *)&int_op, sizeof (int_op)) < 0) {
logperror_pii(pii, "phyint_inst_v6_sockinit: setsockopt"
" IPV6_MULTICAST_LOOP");
return (_B_FALSE);
}
/*
* Filter out so that we only receive ICMP echo replies
*/
ICMP6_FILTER_SETBLOCKALL(&filter);
ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filter);
if (setsockopt(pii->pii_probe_sock, IPPROTO_ICMPV6, ICMP6_FILTER,
(char *)&filter, sizeof (filter)) < 0) {
logperror_pii(pii, "phyint_inst_v6_sockinit: setsockopt"
" ICMP6_FILTER");
return (_B_FALSE);
}
/* Enable receipt of ancillary data */
int_op = 1;
if (setsockopt(pii->pii_probe_sock, IPPROTO_IPV6, IPV6_RECVHOPLIMIT,
(char *)&int_op, sizeof (int_op)) < 0) {
logperror_pii(pii, "phyint_inst_v6_sockinit: setsockopt"
" IPV6_RECVHOPLIMIT");
return (_B_FALSE);
}
return (_B_TRUE);
}
/*
* IPv4 specific part in initializing the pii_probe_sock. This socket is
* used to send/receive ICMPv4 probe packets.
*/
static boolean_t
phyint_inst_v4_sockinit(struct phyint_instance *pii)
{
struct sockaddr_in testaddr;
char char_op;
int ttl = 1;
char char_ttl = 1;
/*
* Open a raw socket with ICMPv4 protocol.
*
* Use IP_DONTFAILOVER_IF to make sure that probes go out
* on the specified phyint only, and are not subject to load
* balancing. Bind to the src address chosen will ensure that
* the responses are received only on the specified phyint.
*
* Set the ttl to 1 so that probe packets are not routed.
* Disable multicast loopback.
*/
pii->pii_probe_sock = socket(pii->pii_af, SOCK_RAW, IPPROTO_ICMP);
if (pii->pii_probe_sock < 0) {
logperror_pii(pii, "phyint_inst_v4_sockinit: socket");
return (_B_FALSE);
}
bzero(&testaddr, sizeof (testaddr));
testaddr.sin_family = AF_INET;
testaddr.sin_port = 0;
IN6_V4MAPPED_TO_INADDR(&pii->pii_probe_logint->li_addr,
&testaddr.sin_addr);
if (bind(pii->pii_probe_sock, (struct sockaddr *)&testaddr,
sizeof (testaddr)) < 0) {
logperror_pii(pii, "phyint_inst_v4_sockinit: IPv4 bind");
return (_B_FALSE);
}
/*
* IP_DONTFAILOVER_IF option takes precedence over setting
* IP_MULTICAST_IF. So we don't set IP_MULTICAST_IF again.
*/
if (setsockopt(pii->pii_probe_sock, IPPROTO_IP, IP_DONTFAILOVER_IF,
(char *)&testaddr.sin_addr, sizeof (struct in_addr)) < 0) {
logperror_pii(pii, "phyint_inst_v4_sockinit: setsockopt"
" IP_DONTFAILOVER");
return (_B_FALSE);
}
if (setsockopt(pii->pii_probe_sock, IPPROTO_IP, IP_TTL,
(char *)&ttl, sizeof (ttl)) < 0) {
logperror_pii(pii, "phyint_inst_v4_sockinit: setsockopt"
" IP_TTL");
return (_B_FALSE);
}
char_op = 0; /* used to turn off option */
if (setsockopt(pii->pii_probe_sock, IPPROTO_IP, IP_MULTICAST_LOOP,
(char *)&char_op, sizeof (char_op)) == -1) {
logperror_pii(pii, "phyint_inst_v4_sockinit: setsockopt"
" IP_MULTICAST_LOOP");
return (_B_FALSE);
}
if (setsockopt(pii->pii_probe_sock, IPPROTO_IP, IP_MULTICAST_TTL,
(char *)&char_ttl, sizeof (char_ttl)) == -1) {
logperror_pii(pii, "phyint_inst_v4_sockinit: setsockopt"
" IP_MULTICAST_TTL");
return (_B_FALSE);
}
return (_B_TRUE);
}
/*
* Remove the phyint group from the list of 'all phyint groups'
* and free it.
*/
static void
phyint_group_delete(struct phyint_group *pg)
{
/*
* The anonymous group always exists, even when empty.
*/
if (pg == phyint_anongroup)
return;
if (debug & D_PHYINT)
logdebug("phyint_group_delete('%s')\n", pg->pg_name);
/*
* The phyint group must be empty, and must not have any phyints.
* The phyint group must be in the list of all phyint groups
*/
assert(pg->pg_phyint == NULL);
assert(phyint_groups == pg || pg->pg_prev != NULL);
if (pg->pg_prev != NULL)
pg->pg_prev->pg_next = pg->pg_next;
else
phyint_groups = pg->pg_next;
if (pg->pg_next != NULL)
pg->pg_next->pg_prev = pg->pg_prev;
pg->pg_next = NULL;
pg->pg_prev = NULL;
phyint_grouplistsig++;
(void) phyint_group_change_event(pg, IPMP_GROUP_REMOVE);
free(pg);
}
/*
* Extract information from the kernel about the desired phyint.
* Look only for properties of the phyint and not properties of logints.
* Take appropriate action on the changes.
* Return codes:
* PI_OK
* The phyint exists in the kernel and matches our knowledge
* of the phyint.
* PI_DELETED
* The phyint has vanished in the kernel.
* PI_IFINDEX_CHANGED
* The phyint's interface index has changed.
* Ask the caller to delete and recreate the phyint.
* PI_IOCTL_ERROR
* Some ioctl error. Don't change anything.
* PI_GROUP_CHANGED
* The phyint has changed group.
*/
int
phyint_inst_update_from_k(struct phyint_instance *pii)
{
struct lifreq lifr;
int ifsock;
struct phyint *pi;
pi = pii->pii_phyint;
if (debug & D_PHYINT) {
logdebug("phyint_inst_update_from_k(%s %s)\n",
AF_STR(pii->pii_af), pi->pi_name);
}
/*
* Get the ifindex from the kernel, for comparison with the
* value in our tables.
*/
(void) strncpy(lifr.lifr_name, pi->pi_name, sizeof (lifr.lifr_name));
lifr.lifr_name[sizeof (lifr.lifr_name) - 1] = '\0';
ifsock = (pii->pii_af == AF_INET) ? ifsock_v4 : ifsock_v6;
if (ioctl(ifsock, SIOCGLIFINDEX, &lifr) < 0) {
if (errno == ENXIO) {
return (PI_DELETED);
} else {
logperror_pii(pii, "phyint_inst_update_from_k:"
" ioctl (get lifindex)");
return (PI_IOCTL_ERROR);
}
}
if (lifr.lifr_index != pi->pi_ifindex) {
/*
* The index has changed. Most likely the interface has
* been unplumbed and replumbed. Ask the caller to take
* appropriate action.
*/
if (debug & D_PHYINT) {
logdebug("phyint_inst_update_from_k:"
" old index %d new index %d\n",
pi->pi_ifindex, lifr.lifr_index);
}
return (PI_IFINDEX_CHANGED);
}
/*
* Get the group name from the kernel, for comparison with
* the value in our tables.
*/
if (ioctl(ifsock, SIOCGLIFGROUPNAME, &lifr) < 0) {
if (errno == ENXIO) {
return (PI_DELETED);
} else {
logperror_pii(pii, "phyint_inst_update_from_k:"
" ioctl (get groupname)");
return (PI_IOCTL_ERROR);
}
}
/*
* If the phyint has changed group i.e. if the phyint group name
* returned by the kernel is different, ask the caller to delete
* and recreate the phyint in the right group
*/
if (strcmp(lifr.lifr_groupname, pi->pi_group->pg_name) != 0) {
/* Groupname has changed */
if (debug & D_PHYINT) {
logdebug("phyint_inst_update_from_k:"
" groupname change\n");
}
return (PI_GROUP_CHANGED);
}
/*
* Get the current phyint flags from the kernel, and determine what
* flags have changed by comparing against our tables. Note that the
* IFF_INACTIVE processing in initifs() relies on this call to ensure
* that IFF_INACTIVE is really still set on the interface.
*/
if (ioctl(ifsock, SIOCGLIFFLAGS, &lifr) < 0) {
if (errno == ENXIO) {
return (PI_DELETED);
} else {
logperror_pii(pii, "phyint_inst_update_from_k: "
" ioctl (get flags)");
return (PI_IOCTL_ERROR);
}
}
pi->pi_flags = PHYINT_FLAGS(lifr.lifr_flags);
if (pi->pi_v4 != NULL)
pi->pi_v4->pii_flags = pi->pi_flags;
if (pi->pi_v6 != NULL)
pi->pi_v6->pii_flags = pi->pi_flags;
if (pi->pi_flags & IFF_FAILED) {
/*
* If we are in the running and full state, we have
* completed failbacks successfully and we would have
* expected IFF_FAILED to have been clear. That it is
* set means there was a race condition. Some other
* process turned on the IFF_FAILED flag. Since the
* flag setting is not atomic, i.e. a get ioctl followed
* by a set ioctl, and since there is no way to set an
* individual flag bit, this could have occurred.
*/
if (pi->pi_state == PI_RUNNING && pi->pi_full)
(void) change_lif_flags(pi, IFF_FAILED, _B_FALSE);
} else {
/*
* If we are in the failed state, there was a race.
* we have completed failover successfully because our
* state is failed and empty. Some other process turned
* off the IFF_FAILED flag. Same comment as above
*/
if (pi->pi_state == PI_FAILED && pi->pi_empty)
(void) change_lif_flags(pi, IFF_FAILED, _B_TRUE);
}
/* No change in phyint status */
return (PI_OK);
}
/*
* Delete the phyint. Remove it from the list of all phyints, and the
* list of phyint group members. If the group becomes empty, delete the
* group also.
*/
static void
phyint_delete(struct phyint *pi)
{
struct phyint_group *pg = pi->pi_group;
if (debug & D_PHYINT)
logdebug("phyint_delete(%s)\n", pi->pi_name);
/* Both IPv4 and IPv6 phyint instances must have been deleted. */
assert(pi->pi_v4 == NULL && pi->pi_v6 == NULL);
/*
* The phyint must belong to a group.
*/
assert(pg->pg_phyint == pi || pi->pi_pgprev != NULL);
/* The phyint must be in the list of all phyints */
assert(phyints == pi || pi->pi_prev != NULL);
/* Remove the phyint from the phyint group list */
pg->pg_sig++;
(void) phyint_group_member_event(pg, pi, IPMP_IF_REMOVE);
if (pi->pi_pgprev == NULL) {
/* Phyint is the 1st in the phyint group list */
pg->pg_phyint = pi->pi_pgnext;
} else {
pi->pi_pgprev->pi_pgnext = pi->pi_pgnext;
}
if (pi->pi_pgnext != NULL)
pi->pi_pgnext->pi_pgprev = pi->pi_pgprev;
pi->pi_pgnext = NULL;
pi->pi_pgprev = NULL;
/* Remove the phyint from the global list of phyints */
if (pi->pi_prev == NULL) {
/* Phyint is the 1st in the list */
phyints = pi->pi_next;
} else {
pi->pi_prev->pi_next = pi->pi_next;
}
if (pi->pi_next != NULL)
pi->pi_next->pi_prev = pi->pi_prev;
pi->pi_next = NULL;
pi->pi_prev = NULL;
free(pi);
/* Delete the phyint_group if the last phyint has been deleted */
if (pg->pg_phyint == NULL)
phyint_group_delete(pg);
}
/*
* Delete (unlink and free), the phyint instance.
*/
void
phyint_inst_delete(struct phyint_instance *pii)
{
struct phyint *pi = pii->pii_phyint;
assert(pi != NULL);
if (debug & D_PHYINT) {
logdebug("phyint_inst_delete(%s %s)\n",
AF_STR(pii->pii_af), pi->pi_name);
}
/*
* If the phyint instance has associated probe targets
* delete all the targets
*/
while (pii->pii_targets != NULL)
target_delete(pii->pii_targets);
/*
* Delete all the logints associated with this phyint
* instance.
*/
while (pii->pii_logint != NULL)
logint_delete(pii->pii_logint);
/*
* Close the socket used to send probes to targets from this phyint.
*/
if (pii->pii_probe_sock != -1)
close_probe_socket(pii, _B_TRUE);
/*
* Phyint instance must be in the list of all phyint instances.
* Remove phyint instance from the global list of phyint instances.
*/
assert(phyint_instances == pii || pii->pii_prev != NULL);
if (pii->pii_prev == NULL) {
/* Phyint is the 1st in the list */
phyint_instances = pii->pii_next;
} else {
pii->pii_prev->pii_next = pii->pii_next;
}
if (pii->pii_next != NULL)
pii->pii_next->pii_prev = pii->pii_prev;
pii->pii_next = NULL;
pii->pii_prev = NULL;
/*
* Reset the phyint instance pointer in the phyint.
* If this is the last phyint instance (being deleted) on this
* phyint, then delete the phyint.
*/
if (pii->pii_af == AF_INET)
pi->pi_v4 = NULL;
else
pi->pi_v6 = NULL;
if (pi->pi_v4 == NULL && pi->pi_v6 == NULL)
phyint_delete(pi);
free(pii);
}
static void
phyint_inst_print(struct phyint_instance *pii)
{
struct logint *li;
struct target *tg;
char abuf[INET6_ADDRSTRLEN];
int most_recent;
int i;
if (pii->pii_phyint == NULL) {
logdebug("pii->pi_phyint NULL can't print\n");
return;
}
logdebug("\nPhyint instance: %s %s index %u state %x flags %llx "
"sock %x in_use %d empty %x full %x\n",
AF_STR(pii->pii_af), pii->pii_name, pii->pii_ifindex,
pii->pii_state, pii->pii_phyint->pi_flags, pii->pii_probe_sock,
pii->pii_in_use, pii->pii_phyint->pi_empty,
pii->pii_phyint->pi_full);
for (li = pii->pii_logint; li != NULL; li = li->li_next)
logint_print(li);
logdebug("\n");
for (tg = pii->pii_targets; tg != NULL; tg = tg->tg_next)
target_print(tg);
if (pii->pii_targets == NULL)
logdebug("pi_targets NULL\n");
if (pii->pii_target_next != NULL) {
logdebug("pi_target_next %s %s\n", AF_STR(pii->pii_af),
pr_addr(pii->pii_af, pii->pii_target_next->tg_address,
abuf, sizeof (abuf)));
} else {
logdebug("pi_target_next NULL\n");
}
if (pii->pii_rtt_target_next != NULL) {
logdebug("pi_rtt_target_next %s %s\n", AF_STR(pii->pii_af),
pr_addr(pii->pii_af, pii->pii_rtt_target_next->tg_address,
abuf, sizeof (abuf)));
} else {
logdebug("pi_rtt_target_next NULL\n");
}
if (pii->pii_targets != NULL) {
most_recent = PROBE_INDEX_PREV(pii->pii_probe_next);
i = most_recent;
do {
if (pii->pii_probes[i].pr_target != NULL) {
logdebug("#%d target %s ", i,
pr_addr(pii->pii_af,
pii->pii_probes[i].pr_target->tg_address,
abuf, sizeof (abuf)));
} else {
logdebug("#%d target NULL ", i);
}
logdebug("time_sent %u status %d time_ack/lost %u\n",
pii->pii_probes[i].pr_time_sent,
pii->pii_probes[i].pr_status,
pii->pii_probes[i].pr_time_lost);
i = PROBE_INDEX_PREV(i);
} while (i != most_recent);
}
}
/*
* Lookup a logint based on the logical interface name, on the given
* phyint instance.
*/
static struct logint *
logint_lookup(struct phyint_instance *pii, char *name)
{
struct logint *li;
if (debug & D_LOGINT) {
logdebug("logint_lookup(%s, %s)\n",
AF_STR(pii->pii_af), name);
}
for (li = pii->pii_logint; li != NULL; li = li->li_next) {
if (strncmp(name, li->li_name, sizeof (li->li_name)) == 0)
break;
}
return (li);
}
/*
* Insert a logint at the head of the list of logints of the given
* phyint instance
*/
static void
logint_insert(struct phyint_instance *pii, struct logint *li)
{
li->li_next = pii->pii_logint;
li->li_prev = NULL;
if (pii->pii_logint != NULL)
pii->pii_logint->li_prev = li;
pii->pii_logint = li;
li->li_phyint_inst = pii;
}
/*
* Create a new named logint, on the specified phyint instance.
*/
static struct logint *
logint_create(struct phyint_instance *pii, char *name)
{
struct logint *li;
if (debug & D_LOGINT) {
logdebug("logint_create(%s %s %s)\n",
AF_STR(pii->pii_af), pii->pii_name, name);
}
li = calloc(1, sizeof (struct logint));
if (li == NULL) {
logperror("logint_create: calloc");
return (NULL);
}
(void) strncpy(li->li_name, name, sizeof (li->li_name));
li->li_name[sizeof (li->li_name) - 1] = '\0';
logint_insert(pii, li);
return (li);
}
/*
* Initialize the logint based on the data returned by the kernel.
*/
void
logint_init_from_k(struct phyint_instance *pii, char *li_name)
{
int ifsock;
uint64_t flags;
uint64_t saved_flags;
struct logint *li;
struct lifreq lifr;
struct in6_addr test_subnet;
struct in6_addr test_subnet_mask;
struct in6_addr testaddr;
int test_subnet_len;
struct sockaddr_in6 *sin6;
struct sockaddr_in *sin;
char abuf[INET6_ADDRSTRLEN];
boolean_t ptp = _B_FALSE;
struct in6_addr tgaddr;
if (debug & D_LOGINT) {
logdebug("logint_init_from_k(%s %s)\n",
AF_STR(pii->pii_af), li_name);
}
/* Get the socket for doing ioctls */
ifsock = (pii->pii_af == AF_INET) ? ifsock_v4 : ifsock_v6;
/*
* Get the flags from the kernel. Also serves as a check whether
* the logical still exists. If it doesn't exist, no need to proceed
* any further. li_in_use will make the caller clean up the logint
*/
(void) strncpy(lifr.lifr_name, li_name, sizeof (lifr.lifr_name));
lifr.lifr_name[sizeof (lifr.lifr_name) - 1] = '\0';
if (ioctl(ifsock, SIOCGLIFFLAGS, (char *)&lifr) < 0) {
/* Interface may have vanished */
if (errno != ENXIO) {
logperror_pii(pii, "logint_init_from_k: "
"ioctl (get flags)");
}
return;
}
flags = lifr.lifr_flags;
/*
* Verified the logint exists. Now lookup the logint in our tables.
* If it does not exist, create a new logint.
*/
li = logint_lookup(pii, li_name);
if (li == NULL) {
li = logint_create(pii, li_name);
if (li == NULL) {
/*
* Pretend the interface does not exist
* in the kernel
*/
return;
}
}
/*
* Update li->li_flags with the new flags, after saving the old
* value. This is used later to check what flags has changed and
* take any action
*/
saved_flags = li->li_flags;
li->li_flags = flags;
/*
* Get the address, prefix, prefixlength and update the logint.
* Check if anything has changed. If the logint used for the
* test address has changed, take suitable action.
*/
if (ioctl(ifsock, SIOCGLIFADDR, (char *)&lifr) < 0) {
/* Interface may have vanished */
if (errno != ENXIO) {
logperror_li(li, "logint_init_from_k: (get addr)");
}
goto error;
}
if (pii->pii_af == AF_INET) {
sin = (struct sockaddr_in *)&lifr.lifr_addr;
IN6_INADDR_TO_V4MAPPED(&sin->sin_addr, &testaddr);
} else {
sin6 = (struct sockaddr_in6 *)&lifr.lifr_addr;
testaddr = sin6->sin6_addr;
}
if (pii->pii_phyint->pi_flags & IFF_POINTOPOINT) {
ptp = _B_TRUE;
if (ioctl(ifsock, SIOCGLIFDSTADDR, (char *)&lifr) < 0) {
if (errno != ENXIO) {
logperror_li(li, "logint_init_from_k:"
" (get dstaddr)");
}
goto error;
}
if (pii->pii_af == AF_INET) {
sin = (struct sockaddr_in *)&lifr.lifr_addr;
IN6_INADDR_TO_V4MAPPED(&sin->sin_addr, &tgaddr);
} else {
sin6 = (struct sockaddr_in6 *)&lifr.lifr_addr;
tgaddr = sin6->sin6_addr;
}
} else {
if (ioctl(ifsock, SIOCGLIFSUBNET, (char *)&lifr) < 0) {
/* Interface may have vanished */
if (errno != ENXIO) {
logperror_li(li, "logint_init_from_k:"
" (get subnet)");
}
goto error;
}
if (lifr.lifr_subnet.ss_family == AF_INET6) {
sin6 = (struct sockaddr_in6 *)&lifr.lifr_subnet;
test_subnet = sin6->sin6_addr;
test_subnet_len = lifr.lifr_addrlen;
} else {
sin = (struct sockaddr_in *)&lifr.lifr_subnet;
IN6_INADDR_TO_V4MAPPED(&sin->sin_addr, &test_subnet);
test_subnet_len = lifr.lifr_addrlen +
(IPV6_ABITS - IP_ABITS);
}
(void) ip_index_to_mask_v6(test_subnet_len, &test_subnet_mask);
}
/*
* Also record the OINDEX for completeness. This information is
* not used.
*/
if (ioctl(ifsock, SIOCGLIFOINDEX, (char *)&lifr) < 0) {
if (errno != ENXIO) {
logperror_li(li, "logint_init_from_k:"
" (get lifoindex)");
}
goto error;
}
/*
* If this is the logint corresponding to the test address used for
* sending probes, then if anything significant has changed we need to
* determine the test address again. We ignore changes to the
* IFF_FAILED and IFF_RUNNING flags since those happen as a matter of
* course.
*/
if (pii->pii_probe_logint == li) {
if (((li->li_flags ^ saved_flags) &
~(IFF_FAILED | IFF_RUNNING)) != 0 ||
!IN6_ARE_ADDR_EQUAL(&testaddr, &li->li_addr) ||
(!ptp && !IN6_ARE_ADDR_EQUAL(&test_subnet,
&li->li_subnet)) ||
(!ptp && test_subnet_len != li->li_subnet_len) ||
(ptp && !IN6_ARE_ADDR_EQUAL(&tgaddr, &li->li_dstaddr))) {
/*
* Something significant that affects the testaddress
* has changed. Redo the testaddress selection later on
* in select_test_ifs(). For now do the cleanup and
* set pii_probe_logint to NULL.
*/
if (pii->pii_probe_sock != -1)
close_probe_socket(pii, _B_TRUE);
pii->pii_probe_logint = NULL;
}
}
/* Update the logint with the values obtained from the kernel. */
li->li_addr = testaddr;
li->li_in_use = 1;
li->li_oifindex = lifr.lifr_index;
if (ptp) {
li->li_dstaddr = tgaddr;
li->li_subnet_len = (pii->pii_af == AF_INET) ?
IP_ABITS : IPV6_ABITS;
} else {
li->li_subnet = test_subnet;
li->li_subnet_len = test_subnet_len;
}
if (debug & D_LOGINT)
logint_print(li);
return;
error:
logerr("logint_init_from_k: IGNORED %s %s %s addr %s\n",
AF_STR(pii->pii_af), pii->pii_name, li->li_name,
pr_addr(pii->pii_af, testaddr, abuf, sizeof (abuf)));
logint_delete(li);
}
/*
* Delete (unlink and free) a logint.
*/
void
logint_delete(struct logint *li)
{
struct phyint_instance *pii;
pii = li->li_phyint_inst;
assert(pii != NULL);
if (debug & D_LOGINT) {
int af;
char abuf[INET6_ADDRSTRLEN];
af = pii->pii_af;
logdebug("logint_delete(%s %s %s/%u)\n",
AF_STR(af), li->li_name,
pr_addr(af, li->li_addr, abuf, sizeof (abuf)),
li->li_subnet_len);
}
/* logint must be in the list of logints */
assert(pii->pii_logint == li || li->li_prev != NULL);
/* Remove the logint from the list of logints */
if (li->li_prev == NULL) {
/* logint is the 1st in the list */
pii->pii_logint = li->li_next;
} else {
li->li_prev->li_next = li->li_next;
}
if (li->li_next != NULL)
li->li_next->li_prev = li->li_prev;
li->li_next = NULL;
li->li_prev = NULL;
/*
* If this logint is also being used for probing, then close the
* associated socket, if it exists.
*/
if (pii->pii_probe_logint == li) {
if (pii->pii_probe_sock != -1)
close_probe_socket(pii, _B_TRUE);
pii->pii_probe_logint = NULL;
}
free(li);
}
static void
logint_print(struct logint *li)
{
char abuf[INET6_ADDRSTRLEN];
int af;
af = li->li_phyint_inst->pii_af;
logdebug("logint: %s %s addr %s/%u", AF_STR(af), li->li_name,
pr_addr(af, li->li_addr, abuf, sizeof (abuf)), li->li_subnet_len);
logdebug("\tFlags: %llx in_use %d oifindex %d\n",
li->li_flags, li->li_in_use, li->li_oifindex);
}
char *
pr_addr(int af, struct in6_addr addr, char *abuf, int len)
{
struct in_addr addr_v4;
if (af == AF_INET) {
IN6_V4MAPPED_TO_INADDR(&addr, &addr_v4);
(void) inet_ntop(AF_INET, (void *)&addr_v4, abuf, len);
} else {
(void) inet_ntop(AF_INET6, (void *)&addr, abuf, len);
}
return (abuf);
}
/* Lookup target on its address */
struct target *
target_lookup(struct phyint_instance *pii, struct in6_addr addr)
{
struct target *tg;
if (debug & D_TARGET) {
char abuf[INET6_ADDRSTRLEN];
logdebug("target_lookup(%s %s): addr %s\n",
AF_STR(pii->pii_af), pii->pii_name,
pr_addr(pii->pii_af, addr, abuf, sizeof (abuf)));
}
for (tg = pii->pii_targets; tg != NULL; tg = tg->tg_next) {
if (IN6_ARE_ADDR_EQUAL(&tg->tg_address, &addr))
break;
}
return (tg);
}
/*
* Find and return the next active target, for the next probe.
* If no active targets are available, return NULL.
*/
struct target *
target_next(struct target *tg)
{
struct phyint_instance *pii = tg->tg_phyint_inst;
struct target *marker = tg;
hrtime_t now;
now = gethrtime();
/*
* Target must be in the list of targets for this phyint
* instance.
*/
assert(pii->pii_targets == tg || tg->tg_prev != NULL);
assert(pii->pii_targets != NULL);
/* Return the next active target */
do {
/*
* Go to the next target. If we hit the end,
* reset the ptr to the head
*/
tg = tg->tg_next;
if (tg == NULL)
tg = pii->pii_targets;
assert(TG_STATUS_VALID(tg->tg_status));
switch (tg->tg_status) {
case TG_ACTIVE:
return (tg);
case TG_UNUSED:
assert(pii->pii_targets_are_routers);
if (pii->pii_ntargets < MAX_PROBE_TARGETS) {
/*
* Bubble up the unused target to active
*/
tg->tg_status = TG_ACTIVE;
pii->pii_ntargets++;
return (tg);
}
break;
case TG_SLOW:
assert(pii->pii_targets_are_routers);
if (tg->tg_latime + MIN_RECOVERY_TIME < now) {
/*
* Bubble up the slow target to unused
*/
tg->tg_status = TG_UNUSED;
}
break;
case TG_DEAD:
assert(pii->pii_targets_are_routers);
if (tg->tg_latime + MIN_RECOVERY_TIME < now) {
/*
* Bubble up the dead target to slow
*/
tg->tg_status = TG_SLOW;
tg->tg_latime = now;
}
break;
}
} while (tg != marker);
return (NULL);
}
/*
* Select the best available target, that is not already TG_ACTIVE,
* for the caller. The caller will determine whether it wants to
* make the returned target TG_ACTIVE.
* The selection order is as follows.
* 1. pick a TG_UNSED target, if it exists.
* 2. else pick a TG_SLOW target that has recovered, if it exists
* 3. else pick any TG_SLOW target, if it exists
* 4. else pick a TG_DEAD target that has recovered, if it exists
* 5. else pick any TG_DEAD target, if it exists
* 6. else return null
*/
static struct target *
target_select_best(struct phyint_instance *pii)
{
struct target *tg;
struct target *slow = NULL;
struct target *dead = NULL;
struct target *slow_recovered = NULL;
struct target *dead_recovered = NULL;
hrtime_t now;
now = gethrtime();
for (tg = pii->pii_targets; tg != NULL; tg = tg->tg_next) {
assert(TG_STATUS_VALID(tg->tg_status));
switch (tg->tg_status) {
case TG_UNUSED:
return (tg);
case TG_SLOW:
if (tg->tg_latime + MIN_RECOVERY_TIME < now) {
slow_recovered = tg;
/*
* Promote the slow_recoverd to unused
*/
tg->tg_status = TG_UNUSED;
} else {
slow = tg;
}
break;
case TG_DEAD:
if (tg->tg_latime + MIN_RECOVERY_TIME < now) {
dead_recovered = tg;
/*
* Promote the dead_recoverd to slow
*/
tg->tg_status = TG_SLOW;
tg->tg_latime = now;
} else {
dead = tg;
}
break;
default:
break;
}
}
if (slow_recovered != NULL)
return (slow_recovered);
else if (slow != NULL)
return (slow);
else if (dead_recovered != NULL)
return (dead_recovered);
else
return (dead);
}
/*
* Some target was deleted. If we don't have even MIN_PROBE_TARGETS
* that are active, pick the next best below.
*/
static void
target_activate_all(struct phyint_instance *pii)
{
struct target *tg;
assert(pii->pii_ntargets == 0);
assert(pii->pii_target_next == NULL);
assert(pii->pii_rtt_target_next == NULL);
assert(pii->pii_targets_are_routers);
while (pii->pii_ntargets < MIN_PROBE_TARGETS) {
tg = target_select_best(pii);
if (tg == NULL) {
/* We are out of targets */
return;
}
assert(TG_STATUS_VALID(tg->tg_status));
assert(tg->tg_status != TG_ACTIVE);
tg->tg_status = TG_ACTIVE;
pii->pii_ntargets++;
if (pii->pii_target_next == NULL) {
pii->pii_target_next = tg;
pii->pii_rtt_target_next = tg;
}
}
}
static struct target *
target_first(struct phyint_instance *pii)
{
struct target *tg;
for (tg = pii->pii_targets; tg != NULL; tg = tg->tg_next) {
assert(TG_STATUS_VALID(tg->tg_status));
if (tg->tg_status == TG_ACTIVE)
break;
}
return (tg);
}
/*
* Create a default target entry.
*/
void
target_create(struct phyint_instance *pii, struct in6_addr addr,
boolean_t is_router)
{
struct target *tg;
struct phyint *pi;
struct logint *li;
if (debug & D_TARGET) {
char abuf[INET6_ADDRSTRLEN];
logdebug("target_create(%s %s, %s)\n",
AF_STR(pii->pii_af), pii->pii_name,
pr_addr(pii->pii_af, addr, abuf, sizeof (abuf)));
}
/*
* If the test address is not yet initialized, do not add
* any target, since we cannot determine whether the target
* belongs to the same subnet as the test address.
*/
li = pii->pii_probe_logint;
if (li == NULL)
return;
/*
* If there are multiple subnets associated with an interface, then
* add the target to this phyint instance, only if it belongs to the
* same subnet as the test address. The reason is that interface
* routes derived from non-test-addresses i.e. non-IFF_NOFAILOVER
* addresses, will disappear after failover, and the targets will not
* be reachable from this interface.
*/
if (!prefix_equal(li->li_subnet, addr, li->li_subnet_len))
return;
if (pii->pii_targets != NULL) {
assert(pii->pii_ntargets <= MAX_PROBE_TARGETS);
if (is_router) {
if (!pii->pii_targets_are_routers) {
/*
* Prefer router over hosts. Using hosts is a
* fallback mechanism, hence delete all host
* targets.
*/
while (pii->pii_targets != NULL)
target_delete(pii->pii_targets);
}
} else {
/*
* Routers take precedence over hosts. If this
* is a router list and we are trying to add a
* host, just return. If this is a host list
* and if we have sufficient targets, just return
*/
if (pii->pii_targets_are_routers ||
pii->pii_ntargets == MAX_PROBE_TARGETS)
return;
}
}
tg = calloc(1, sizeof (struct target));
if (tg == NULL) {
logperror("target_create: calloc");
return;
}
tg->tg_phyint_inst = pii;
tg->tg_address = addr;
tg->tg_in_use = 1;
tg->tg_rtt_sa = -1;
tg->tg_num_deferred = 0;
/*
* If this is the first target, set 'pii_targets_are_routers'
* The list of targets is either a list of hosts or list or
* routers, but not a mix.
*/
if (pii->pii_targets == NULL) {
assert(pii->pii_ntargets == 0);
assert(pii->pii_target_next == NULL);
assert(pii->pii_rtt_target_next == NULL);
pii->pii_targets_are_routers = is_router ? 1 : 0;
}
if (pii->pii_ntargets == MAX_PROBE_TARGETS) {
assert(pii->pii_targets_are_routers);
assert(pii->pii_target_next != NULL);
assert(pii->pii_rtt_target_next != NULL);
tg->tg_status = TG_UNUSED;
} else {
if (pii->pii_ntargets == 0) {
assert(pii->pii_target_next == NULL);
pii->pii_target_next = tg;
pii->pii_rtt_target_next = tg;
}
pii->pii_ntargets++;
tg->tg_status = TG_ACTIVE;
}
target_insert(pii, tg);
/*
* Change state to PI_RUNNING if this phyint instance is capable of
* sending and receiving probes -- that is, if we know of at least 1
* target, and this phyint instance is probe-capable. For more
* details, see the phyint state diagram in mpd_probe.c.
*/
pi = pii->pii_phyint;
if (pi->pi_state == PI_NOTARGETS && PROBE_CAPABLE(pii)) {
if (pi->pi_flags & IFF_FAILED)
phyint_chstate(pi, PI_FAILED);
else
phyint_chstate(pi, PI_RUNNING);
}
}
/*
* Add the target address named by `addr' to phyint instance `pii' if it does
* not already exist. If the target is a router, `is_router' should be set to
* B_TRUE.
*/
void
target_add(struct phyint_instance *pii, struct in6_addr addr,
boolean_t is_router)
{
struct target *tg;
if (pii == NULL)
return;
tg = target_lookup(pii, addr);
/*
* If the target does not exist, create it; target_create() will set
* tg_in_use to true. If it exists already, and it is a router
* target, set tg_in_use to to true, so that init_router_targets()
* won't delete it
*/
if (tg == NULL)
target_create(pii, addr, is_router);
else if (is_router)
tg->tg_in_use = 1;
}
/*
* Insert target at head of linked list of targets for the associated
* phyint instance
*/
static void
target_insert(struct phyint_instance *pii, struct target *tg)
{
tg->tg_next = pii->pii_targets;
tg->tg_prev = NULL;
if (tg->tg_next != NULL)
tg->tg_next->tg_prev = tg;
pii->pii_targets = tg;
}
/*
* Delete a target (unlink and free).
*/
void
target_delete(struct target *tg)
{
int af;
struct phyint_instance *pii;
struct phyint_instance *pii_other;
pii = tg->tg_phyint_inst;
af = pii->pii_af;
if (debug & D_TARGET) {
char abuf[INET6_ADDRSTRLEN];
logdebug("target_delete(%s %s, %s)\n",
AF_STR(af), pii->pii_name,
pr_addr(af, tg->tg_address, abuf, sizeof (abuf)));
}
/*
* Target must be in the list of targets for this phyint
* instance.
*/
assert(pii->pii_targets == tg || tg->tg_prev != NULL);
/*
* Reset all references to 'tg' in the probe information
* for this phyint.
*/
reset_pii_probes(pii, tg);
/*
* Remove this target from the list of targets of this
* phyint instance.
*/
if (tg->tg_prev == NULL) {
pii->pii_targets = tg->tg_next;
} else {
tg->tg_prev->tg_next = tg->tg_next;
}
if (tg->tg_next != NULL)
tg->tg_next->tg_prev = tg->tg_prev;
tg->tg_next = NULL;
tg->tg_prev = NULL;
if (tg->tg_status == TG_ACTIVE)
pii->pii_ntargets--;
/*
* Adjust the next target to probe, if it points to
* to the currently deleted target.
*/
if (pii->pii_target_next == tg)
pii->pii_target_next = target_first(pii);
if (pii->pii_rtt_target_next == tg)
pii->pii_rtt_target_next = target_first(pii);
free(tg);
/*
* The number of active targets pii_ntargets == 0 iff
* the next active target pii->pii_target_next == NULL
*/
if (pii->pii_ntargets != 0) {
assert(pii->pii_target_next != NULL);
assert(pii->pii_rtt_target_next != NULL);
assert(pii->pii_target_next->tg_status == TG_ACTIVE);
assert(pii->pii_rtt_target_next->tg_status == TG_ACTIVE);
return;
}
/* At this point, we don't have any active targets. */
assert(pii->pii_target_next == NULL);
assert(pii->pii_rtt_target_next == NULL);
if (pii->pii_targets_are_routers) {
/*
* Activate any TG_SLOW or TG_DEAD router targets,
* since we don't have any other targets
*/
target_activate_all(pii);
if (pii->pii_ntargets != 0) {
assert(pii->pii_target_next != NULL);
assert(pii->pii_rtt_target_next != NULL);
assert(pii->pii_target_next->tg_status == TG_ACTIVE);
assert(pii->pii_rtt_target_next->tg_status ==
TG_ACTIVE);
return;
}
}
/*
* If we still don't have any active targets, the list must
* must be really empty. There aren't even TG_SLOW or TG_DEAD
* targets. Zero out the probe stats since it will not be
* relevant any longer.
*/
assert(pii->pii_targets == NULL);
clear_pii_probe_stats(pii);
pii_other = phyint_inst_other(pii);
/*
* If there are no targets on both instances and the interface is
* online, go back to PI_NOTARGETS state, since we cannot probe this
* phyint any more. For more details, please see phyint state
* diagram in mpd_probe.c.
*/
if (!PROBE_CAPABLE(pii_other) &&
pii->pii_phyint->pi_state != PI_OFFLINE)
phyint_chstate(pii->pii_phyint, PI_NOTARGETS);
}
/*
* Flush the target list of every phyint in the group, if the list
* is a host target list. This is called if group failure is suspected.
* If all targets have failed, multicast will subsequently discover new
* targets. Else it is a group failure.
* Note: This function is a no-op if the list is a router target list.
*/
static void
target_flush_hosts(struct phyint_group *pg)
{
struct phyint *pi;
struct phyint_instance *pii;
if (debug & D_TARGET)
logdebug("target_flush_hosts(%s)\n", pg->pg_name);
for (pi = pg->pg_phyint; pi != NULL; pi = pi->pi_pgnext) {
pii = pi->pi_v4;
if (pii != NULL && !pii->pii_targets_are_routers) {
/*
* Delete all the targets. When the list becomes
* empty, target_delete() will set pii->pii_targets
* to NULL.
*/
while (pii->pii_targets != NULL)
target_delete(pii->pii_targets);
}
pii = pi->pi_v6;
if (pii != NULL && !pii->pii_targets_are_routers) {
/*
* Delete all the targets. When the list becomes
* empty, target_delete() will set pii->pii_targets
* to NULL.
*/
while (pii->pii_targets != NULL)
target_delete(pii->pii_targets);
}
}
}
/*
* Reset all references to 'target' in the probe info, as this target is
* being deleted. The pr_target field is guaranteed to be non-null if
* pr_status is PR_UNACKED. So we change the pr_status to PR_LOST, so that
* pr_target will not be accessed unconditionally.
*/
static void
reset_pii_probes(struct phyint_instance *pii, struct target *tg)
{
int i;
for (i = 0; i < PROBE_STATS_COUNT; i++) {
if (pii->pii_probes[i].pr_target == tg) {
pii->pii_probes[i].pr_target = NULL;
if (pii->pii_probes[i].pr_status == PR_UNACKED)
pii->pii_probes[i].pr_status = PR_LOST;
}
}
}
/*
* Clear the probe statistics array.
*/
void
clear_pii_probe_stats(struct phyint_instance *pii)
{
bzero(pii->pii_probes, sizeof (struct probe_stats) * PROBE_STATS_COUNT);
/* Reset the next probe index in the probe stats array */
pii->pii_probe_next = 0;
}
static void
target_print(struct target *tg)
{
char abuf[INET6_ADDRSTRLEN];
char buf[128];
char buf2[128];
int af;
int i;
af = tg->tg_phyint_inst->pii_af;
logdebug("Target on %s %s addr %s\n"
"status %d rtt_sa %d rtt_sd %d crtt %d tg_in_use %d\n",
AF_STR(af), tg->tg_phyint_inst->pii_name,
pr_addr(af, tg->tg_address, abuf, sizeof (abuf)),
tg->tg_status, tg->tg_rtt_sa, tg->tg_rtt_sd,
tg->tg_crtt, tg->tg_in_use);
buf[0] = '\0';
for (i = 0; i < tg->tg_num_deferred; i++) {
(void) snprintf(buf2, sizeof (buf2), " %dms",
tg->tg_deferred[i]);
(void) strlcat(buf, buf2, sizeof (buf));
}
logdebug("deferred rtts:%s\n", buf);
}
void
phyint_inst_print_all(void)
{
struct phyint_instance *pii;
for (pii = phyint_instances; pii != NULL; pii = pii->pii_next) {
phyint_inst_print(pii);
}
}
/*
* Convert length for a mask to the mask.
*/
static void
ip_index_to_mask_v6(uint_t masklen, struct in6_addr *bitmask)
{
int j;
assert(masklen <= IPV6_ABITS);
bzero((char *)bitmask, sizeof (*bitmask));
/* Make the 'masklen' leftmost bits one */
for (j = 0; masklen > 8; masklen -= 8, j++)
bitmask->s6_addr[j] = 0xff;
bitmask->s6_addr[j] = 0xff << (8 - masklen);
}
/*
* Compare two prefixes that have the same prefix length.
* Fails if the prefix length is unreasonable.
*/
static boolean_t
prefix_equal(struct in6_addr p1, struct in6_addr p2, int prefix_len)
{
uchar_t mask;
int j;
if (prefix_len < 0 || prefix_len > IPV6_ABITS)
return (_B_FALSE);
for (j = 0; prefix_len > 8; prefix_len -= 8, j++)
if (p1.s6_addr[j] != p2.s6_addr[j])
return (_B_FALSE);
/* Make the N leftmost bits one */
mask = 0xff << (8 - prefix_len);
if ((p1.s6_addr[j] & mask) != (p2.s6_addr[j] & mask))
return (_B_FALSE);
return (_B_TRUE);
}
/*
* Get the number of UP logints (excluding IFF_NOFAILOVERs), on both
* IPv4 and IPv6 put together. The phyint with the least such number
* will be used as the failover destination, if no standby interface is
* available
*/
int
logint_upcount(struct phyint *pi)
{
struct logint *li;
struct phyint_instance *pii;
int count = 0;
pii = pi->pi_v4;
if (pii != NULL) {
for (li = pii->pii_logint; li != NULL; li = li->li_next) {
if ((li->li_flags &
(IFF_UP | IFF_NOFAILOVER)) == IFF_UP) {
count++;
}
}
}
pii = pi->pi_v6;
if (pii != NULL) {
for (li = pii->pii_logint; li != NULL; li = li->li_next) {
if ((li->li_flags &
(IFF_UP | IFF_NOFAILOVER)) == IFF_UP) {
count++;
}
}
}
return (count);
}
/*
* Get the phyint instance with the other (IPv4 / IPv6) protocol
*/
struct phyint_instance *
phyint_inst_other(struct phyint_instance *pii)
{
if (pii->pii_af == AF_INET)
return (pii->pii_phyint->pi_v6);
else
return (pii->pii_phyint->pi_v4);
}
/*
* Post an EC_IPMP sysevent of subclass `subclass' and attributes `nvl'.
* Before sending the event, it prepends the current version of the IPMP
* sysevent API. Returns 0 on success, -1 on failure (in either case,
* `nvl' is freed).
*/
static int
post_event(const char *subclass, nvlist_t *nvl)
{
sysevent_id_t eid;
/*
* Since sysevents don't work yet in non-global zones, there cannot
* possibly be any consumers yet, so don't bother trying to generate
* them. (Otherwise, we'll spew warnings.)
*/
if (getzoneid() != GLOBAL_ZONEID) {
nvlist_free(nvl);
return (0);
}
errno = nvlist_add_uint32(nvl, IPMP_EVENT_VERSION,
IPMP_EVENT_CUR_VERSION);
if (errno != 0) {
logerr("cannot create `%s' event: %s", subclass,
strerror(errno));
goto failed;
}
if (sysevent_post_event(EC_IPMP, (char *)subclass, SUNW_VENDOR,
"in.mpathd", nvl, &eid) == -1) {
logerr("cannot send `%s' event: %s\n", subclass,
strerror(errno));
goto failed;
}
nvlist_free(nvl);
return (0);
failed:
nvlist_free(nvl);
return (-1);
}
/*
* Return the external IPMP state associated with phyint `pi'.
*/
static ipmp_if_state_t
ifstate(struct phyint *pi)
{
switch (pi->pi_state) {
case PI_NOTARGETS:
return (IPMP_IF_UNKNOWN);
case PI_OFFLINE:
return (IPMP_IF_OFFLINE);
case PI_FAILED:
return (IPMP_IF_FAILED);
case PI_RUNNING:
return (IPMP_IF_OK);
}
logerr("ifstate: unknown state %d; aborting\n", pi->pi_state);
abort();
/* NOTREACHED */
}
/*
* Return the external IPMP interface type associated with phyint `pi'.
*/
static ipmp_if_type_t
iftype(struct phyint *pi)
{
if (pi->pi_flags & IFF_STANDBY)
return (IPMP_IF_STANDBY);
else
return (IPMP_IF_NORMAL);
}
/*
* Return the external IPMP group state associated with phyint group `pg'.
*/
static ipmp_group_state_t
groupstate(struct phyint_group *pg)
{
return (GROUP_FAILED(pg) ? IPMP_GROUP_FAILED : IPMP_GROUP_OK);
}
/*
* Generate an ESC_IPMP_GROUP_STATE sysevent for phyint group `pg'.
* Returns 0 on success, -1 on failure.
*/
static int
phyint_group_state_event(struct phyint_group *pg)
{
nvlist_t *nvl;
errno = nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0);
if (errno != 0) {
logperror("cannot create `group state change' event");
return (-1);
}
errno = nvlist_add_string(nvl, IPMP_GROUP_NAME, pg->pg_name);
if (errno != 0)
goto failed;
errno = nvlist_add_uint64(nvl, IPMP_GROUP_SIGNATURE, pg->pg_sig);
if (errno != 0)
goto failed;
errno = nvlist_add_uint32(nvl, IPMP_GROUP_STATE, groupstate(pg));
if (errno != 0)
goto failed;
return (post_event(ESC_IPMP_GROUP_STATE, nvl));
failed:
logperror("cannot create `group state change' event");
nvlist_free(nvl);
return (-1);
}
/*
* Generate an ESC_IPMP_GROUP_CHANGE sysevent of type `op' for phyint group
* `pg'. Returns 0 on success, -1 on failure.
*/
static int
phyint_group_change_event(struct phyint_group *pg, ipmp_group_op_t op)
{
nvlist_t *nvl;
errno = nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0);
if (errno != 0) {
logperror("cannot create `group change' event");
return (-1);
}
errno = nvlist_add_string(nvl, IPMP_GROUP_NAME, pg->pg_name);
if (errno != 0)
goto failed;
errno = nvlist_add_uint64(nvl, IPMP_GROUP_SIGNATURE, pg->pg_sig);
if (errno != 0)
goto failed;
errno = nvlist_add_uint64(nvl, IPMP_GROUPLIST_SIGNATURE,
phyint_grouplistsig);
if (errno != 0)
goto failed;
errno = nvlist_add_uint32(nvl, IPMP_GROUP_OPERATION, op);
if (errno != 0)
goto failed;
return (post_event(ESC_IPMP_GROUP_CHANGE, nvl));
failed:
logperror("cannot create `group change' event");
nvlist_free(nvl);
return (-1);
}
/*
* Generate an ESC_IPMP_GROUP_MEMBER_CHANGE sysevent for phyint `pi' in
* group `pg'. Returns 0 on success, -1 on failure.
*/
static int
phyint_group_member_event(struct phyint_group *pg, struct phyint *pi,
ipmp_if_op_t op)
{
nvlist_t *nvl;
errno = nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0);
if (errno != 0) {
logperror("cannot create `group member change' event");
return (-1);
}
errno = nvlist_add_string(nvl, IPMP_GROUP_NAME, pg->pg_name);
if (errno != 0)
goto failed;
errno = nvlist_add_uint64(nvl, IPMP_GROUP_SIGNATURE, pg->pg_sig);
if (errno != 0)
goto failed;
errno = nvlist_add_uint32(nvl, IPMP_IF_OPERATION, op);
if (errno != 0)
goto failed;
errno = nvlist_add_string(nvl, IPMP_IF_NAME, pi->pi_name);
if (errno != 0)
goto failed;
errno = nvlist_add_uint32(nvl, IPMP_IF_TYPE, iftype(pi));
if (errno != 0)
goto failed;
errno = nvlist_add_uint32(nvl, IPMP_IF_STATE, ifstate(pi));
if (errno != 0)
goto failed;
return (post_event(ESC_IPMP_GROUP_MEMBER_CHANGE, nvl));
failed:
logperror("cannot create `group member change' event");
nvlist_free(nvl);
return (-1);
}
/*
* Generate an ESC_IPMP_IF_CHANGE sysevent for phyint `pi' in group `pg'.
* Returns 0 on success, -1 on failure.
*/
static int
phyint_state_event(struct phyint_group *pg, struct phyint *pi)
{
nvlist_t *nvl;
errno = nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0);
if (errno != 0) {
logperror("cannot create `interface change' event");
return (-1);
}
errno = nvlist_add_string(nvl, IPMP_GROUP_NAME, pg->pg_name);
if (errno != 0)
goto failed;
errno = nvlist_add_uint64(nvl, IPMP_GROUP_SIGNATURE, pg->pg_sig);
if (errno != 0)
goto failed;
errno = nvlist_add_string(nvl, IPMP_IF_NAME, pi->pi_name);
if (errno != 0)
goto failed;
errno = nvlist_add_uint32(nvl, IPMP_IF_TYPE, iftype(pi));
if (errno != 0)
goto failed;
errno = nvlist_add_uint32(nvl, IPMP_IF_STATE, ifstate(pi));
if (errno != 0)
goto failed;
return (post_event(ESC_IPMP_IF_CHANGE, nvl));
failed:
logperror("cannot create `interface change' event");
nvlist_free(nvl);
return (-1);
}
/*
* Generate a signature for use. The signature is conceptually divided
* into two pieces: a random 16-bit "generation number" and a 48-bit
* monotonically increasing integer. The generation number protects
* against stale updates to entities (e.g., IPMP groups) that have been
* deleted and since recreated.
*/
static uint64_t
gensig(void)
{
static int seeded = 0;
if (seeded == 0) {
srand48((long)gethrtime());
seeded++;
}
return ((uint64_t)lrand48() << 48 | 1);
}
/*
* Store the information associated with group `grname' into a dynamically
* allocated structure pointed to by `*grinfopp'. Returns an IPMP error code.
*/
unsigned int
getgroupinfo(const char *grname, ipmp_groupinfo_t **grinfopp)
{
struct phyint_group *pg;
struct phyint *pi;
char (*ifs)[LIFNAMSIZ];
unsigned int nif, i;
pg = phyint_group_lookup(grname);
if (pg == NULL)
return (IPMP_EUNKGROUP);
/*
* Tally up the number of interfaces, allocate an array to hold them,
* and insert their names into the array.
*/
for (nif = 0, pi = pg->pg_phyint; pi != NULL; pi = pi->pi_pgnext)
nif++;
ifs = alloca(nif * sizeof (*ifs));
for (i = 0, pi = pg->pg_phyint; pi != NULL; pi = pi->pi_pgnext, i++) {
assert(i < nif);
(void) strlcpy(ifs[i], pi->pi_name, LIFNAMSIZ);
}
assert(i == nif);
*grinfopp = ipmp_groupinfo_create(pg->pg_name, pg->pg_sig,
groupstate(pg), nif, ifs);
return (*grinfopp == NULL ? IPMP_ENOMEM : IPMP_SUCCESS);
}
/*
* Store the information associated with interface `ifname' into a dynamically
* allocated structure pointed to by `*ifinfopp'. Returns an IPMP error code.
*/
unsigned int
getifinfo(const char *ifname, ipmp_ifinfo_t **ifinfopp)
{
struct phyint *pi;
pi = phyint_lookup(ifname);
if (pi == NULL)
return (IPMP_EUNKIF);
*ifinfopp = ipmp_ifinfo_create(pi->pi_name, pi->pi_group->pg_name,
ifstate(pi), iftype(pi));
return (*ifinfopp == NULL ? IPMP_ENOMEM : IPMP_SUCCESS);
}
/*
* Store the current list of IPMP groups into a dynamically allocated
* structure pointed to by `*grlistpp'. Returns an IPMP error code.
*/
unsigned int
getgrouplist(ipmp_grouplist_t **grlistpp)
{
struct phyint_group *pg;
char (*groups)[LIFGRNAMSIZ];
unsigned int i, ngroup;
/*
* Tally up the number of groups, allocate an array to hold them, and
* insert their names into the array.
*/
for (ngroup = 0, pg = phyint_groups; pg != NULL; pg = pg->pg_next)
ngroup++;
groups = alloca(ngroup * sizeof (*groups));
for (i = 0, pg = phyint_groups; pg != NULL; pg = pg->pg_next, i++) {
assert(i < ngroup);
(void) strlcpy(groups[i], pg->pg_name, LIFGRNAMSIZ);
}
assert(i == ngroup);
*grlistpp = ipmp_grouplist_create(phyint_grouplistsig, ngroup, groups);
return (*grlistpp == NULL ? IPMP_ENOMEM : IPMP_SUCCESS);
}
/*
* Store a snapshot of the IPMP subsystem into a dynamically allocated
* structure pointed to by `*snapp'. Returns an IPMP error code.
*/
unsigned int
getsnap(ipmp_snap_t **snapp)
{
ipmp_grouplist_t *grlistp;
ipmp_groupinfo_t *grinfop;
ipmp_ifinfo_t *ifinfop;
ipmp_snap_t *snap;
struct phyint *pi;
unsigned int i;
int retval;
snap = ipmp_snap_create();
if (snap == NULL)
return (IPMP_ENOMEM);
/*
* Add group list.
*/
retval = getgrouplist(&snap->sn_grlistp);
if (retval != IPMP_SUCCESS) {
ipmp_snap_free(snap);
return (retval);
}
/*
* Add information for each group in the list.
*/
grlistp = snap->sn_grlistp;
for (i = 0; i < grlistp->gl_ngroup; i++) {
retval = getgroupinfo(grlistp->gl_groups[i], &grinfop);
if (retval != IPMP_SUCCESS) {
ipmp_snap_free(snap);
return (retval);
}
retval = ipmp_snap_addgroupinfo(snap, grinfop);
if (retval != IPMP_SUCCESS) {
ipmp_freegroupinfo(grinfop);
ipmp_snap_free(snap);
return (retval);
}
}
/*
* Add information for each configured phyint.
*/
for (pi = phyints; pi != NULL; pi = pi->pi_next) {
retval = getifinfo(pi->pi_name, &ifinfop);
if (retval != IPMP_SUCCESS) {
ipmp_snap_free(snap);
return (retval);
}
retval = ipmp_snap_addifinfo(snap, ifinfop);
if (retval != IPMP_SUCCESS) {
ipmp_freeifinfo(ifinfop);
ipmp_snap_free(snap);
return (retval);
}
}
*snapp = snap;
return (IPMP_SUCCESS);
}