OpenSolaris_b135/cmd/rcm_daemon/common/vlan_rcm.c
/*
* 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 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* This RCM module adds support to the RCM framework for VLAN links
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <synch.h>
#include <assert.h>
#include <strings.h>
#include "rcm_module.h"
#include <libintl.h>
#include <libdllink.h>
#include <libdlvlan.h>
#include <libdlpi.h>
/*
* Definitions
*/
#ifndef lint
#define _(x) gettext(x)
#else
#define _(x) x
#endif
/* Some generic well-knowns and defaults used in this module */
#define RCM_LINK_PREFIX "SUNW_datalink" /* RCM datalink name prefix */
#define RCM_LINK_RESOURCE_MAX (13 + LINKID_STR_WIDTH)
/* VLAN link flags */
typedef enum {
VLAN_OFFLINED = 0x1,
VLAN_CONSUMER_OFFLINED = 0x2,
VLAN_STALE = 0x4
} vlan_flag_t;
/* link representation */
typedef struct dl_vlan {
struct dl_vlan *dv_next; /* next VLAN on the same link */
struct dl_vlan *dv_prev; /* prev VLAN on the same link */
datalink_id_t dv_vlanid;
vlan_flag_t dv_flags; /* VLAN link flags */
} dl_vlan_t;
/* VLAN Cache state flags */
typedef enum {
CACHE_NODE_STALE = 0x1, /* stale cached data */
CACHE_NODE_NEW = 0x2, /* new cached nodes */
CACHE_NODE_OFFLINED = 0x4 /* nodes offlined */
} cache_node_state_t;
/* Network Cache lookup options */
#define CACHE_NO_REFRESH 0x1 /* cache refresh not needed */
#define CACHE_REFRESH 0x2 /* refresh cache */
/* Cache element */
typedef struct link_cache {
struct link_cache *vc_next; /* next cached resource */
struct link_cache *vc_prev; /* prev cached resource */
char *vc_resource; /* resource name */
datalink_id_t vc_linkid; /* linkid */
dl_vlan_t *vc_vlan; /* VLAN list on this link */
cache_node_state_t vc_state; /* cache state flags */
} link_cache_t;
/*
* Global cache for network VLANs
*/
static link_cache_t cache_head;
static link_cache_t cache_tail;
static mutex_t cache_lock;
static int events_registered = 0;
static dladm_handle_t dld_handle = NULL;
/*
* RCM module interface prototypes
*/
static int vlan_register(rcm_handle_t *);
static int vlan_unregister(rcm_handle_t *);
static int vlan_get_info(rcm_handle_t *, char *, id_t, uint_t,
char **, char **, nvlist_t *, rcm_info_t **);
static int vlan_suspend(rcm_handle_t *, char *, id_t,
timespec_t *, uint_t, char **, rcm_info_t **);
static int vlan_resume(rcm_handle_t *, char *, id_t, uint_t,
char **, rcm_info_t **);
static int vlan_offline(rcm_handle_t *, char *, id_t, uint_t,
char **, rcm_info_t **);
static int vlan_undo_offline(rcm_handle_t *, char *, id_t, uint_t,
char **, rcm_info_t **);
static int vlan_remove(rcm_handle_t *, char *, id_t, uint_t,
char **, rcm_info_t **);
static int vlan_notify_event(rcm_handle_t *, char *, id_t, uint_t,
char **, nvlist_t *, rcm_info_t **);
static int vlan_configure(rcm_handle_t *, datalink_id_t);
/* Module private routines */
static void cache_free();
static int cache_update(rcm_handle_t *);
static void cache_remove(link_cache_t *);
static void node_free(link_cache_t *);
static void cache_insert(link_cache_t *);
static link_cache_t *cache_lookup(rcm_handle_t *, char *, char);
static int vlan_consumer_offline(rcm_handle_t *, link_cache_t *,
char **, uint_t, rcm_info_t **);
static void vlan_consumer_online(rcm_handle_t *, link_cache_t *,
char **, uint_t, rcm_info_t **);
static int vlan_offline_vlan(link_cache_t *, uint32_t,
cache_node_state_t);
static void vlan_online_vlan(link_cache_t *);
static char *vlan_usage(link_cache_t *);
static void vlan_log_err(datalink_id_t, char **, char *);
static int vlan_consumer_notify(rcm_handle_t *, datalink_id_t,
char **, uint_t, rcm_info_t **);
/* Module-Private data */
static struct rcm_mod_ops vlan_ops =
{
RCM_MOD_OPS_VERSION,
vlan_register,
vlan_unregister,
vlan_get_info,
vlan_suspend,
vlan_resume,
vlan_offline,
vlan_undo_offline,
vlan_remove,
NULL,
NULL,
vlan_notify_event
};
/*
* rcm_mod_init() - Update registrations, and return the ops structure.
*/
struct rcm_mod_ops *
rcm_mod_init(void)
{
dladm_status_t status;
char errmsg[DLADM_STRSIZE];
rcm_log_message(RCM_TRACE1, "VLAN: mod_init\n");
cache_head.vc_next = &cache_tail;
cache_head.vc_prev = NULL;
cache_tail.vc_prev = &cache_head;
cache_tail.vc_next = NULL;
(void) mutex_init(&cache_lock, 0, NULL);
if ((status = dladm_open(&dld_handle)) != DLADM_STATUS_OK) {
rcm_log_message(RCM_WARNING,
"VLAN: mod_init failed: cannot open datalink handle: %s\n",
dladm_status2str(status, errmsg));
return (NULL);
}
/* Return the ops vectors */
return (&vlan_ops);
}
/*
* rcm_mod_info() - Return a string describing this module.
*/
const char *
rcm_mod_info(void)
{
rcm_log_message(RCM_TRACE1, "VLAN: mod_info\n");
return ("VLAN module version 1.2");
}
/*
* rcm_mod_fini() - Destroy the network VLAN cache.
*/
int
rcm_mod_fini(void)
{
rcm_log_message(RCM_TRACE1, "VLAN: mod_fini\n");
/*
* Note that vlan_unregister() does not seem to be called anywhere,
* therefore we free the cache nodes here. In theory we should call
* rcm_register_interest() for each node before we free it, the
* framework does not provide the rcm_handle to allow us to do so.
*/
cache_free();
(void) mutex_destroy(&cache_lock);
dladm_close(dld_handle);
return (RCM_SUCCESS);
}
/*
* vlan_register() - Make sure the cache is properly sync'ed, and its
* registrations are in order.
*/
static int
vlan_register(rcm_handle_t *hd)
{
rcm_log_message(RCM_TRACE1, "VLAN: register\n");
if (cache_update(hd) < 0)
return (RCM_FAILURE);
/*
* Need to register interest in all new resources
* getting attached, so we get attach event notifications
*/
if (!events_registered) {
if (rcm_register_event(hd, RCM_RESOURCE_LINK_NEW, 0, NULL)
!= RCM_SUCCESS) {
rcm_log_message(RCM_ERROR,
_("VLAN: failed to register %s\n"),
RCM_RESOURCE_LINK_NEW);
return (RCM_FAILURE);
} else {
rcm_log_message(RCM_DEBUG, "VLAN: registered %s\n",
RCM_RESOURCE_LINK_NEW);
events_registered++;
}
}
return (RCM_SUCCESS);
}
/*
* vlan_unregister() - Walk the cache, unregistering all the networks.
*/
static int
vlan_unregister(rcm_handle_t *hd)
{
link_cache_t *node;
rcm_log_message(RCM_TRACE1, "VLAN: unregister\n");
/* Walk the cache, unregistering everything */
(void) mutex_lock(&cache_lock);
node = cache_head.vc_next;
while (node != &cache_tail) {
if (rcm_unregister_interest(hd, node->vc_resource, 0)
!= RCM_SUCCESS) {
rcm_log_message(RCM_ERROR,
_("VLAN: failed to unregister %s\n"),
node->vc_resource);
(void) mutex_unlock(&cache_lock);
return (RCM_FAILURE);
}
cache_remove(node);
node_free(node);
node = cache_head.vc_next;
}
(void) mutex_unlock(&cache_lock);
/*
* Unregister interest in all new resources
*/
if (events_registered) {
if (rcm_unregister_event(hd, RCM_RESOURCE_LINK_NEW, 0)
!= RCM_SUCCESS) {
rcm_log_message(RCM_ERROR,
_("VLAN: failed to unregister %s\n"),
RCM_RESOURCE_LINK_NEW);
return (RCM_FAILURE);
} else {
rcm_log_message(RCM_DEBUG, "VLAN: unregistered %s\n",
RCM_RESOURCE_LINK_NEW);
events_registered--;
}
}
return (RCM_SUCCESS);
}
/*
* vlan_offline() - Offline VLANs on a specific node.
*/
static int
vlan_offline(rcm_handle_t *hd, char *rsrc, id_t id, uint_t flags,
char **errorp, rcm_info_t **info)
{
link_cache_t *node;
rcm_log_message(RCM_TRACE1, "VLAN: offline(%s)\n", rsrc);
/* Lock the cache and lookup the resource */
(void) mutex_lock(&cache_lock);
node = cache_lookup(hd, rsrc, CACHE_REFRESH);
if (node == NULL) {
/* should not happen because the resource is registered. */
vlan_log_err(node->vc_linkid, errorp, "unrecognized resource");
(void) mutex_unlock(&cache_lock);
return (RCM_SUCCESS);
}
/*
* Inform consumers (IP interfaces) of associated VLANs to be offlined
*/
if (vlan_consumer_offline(hd, node, errorp, flags, info) ==
RCM_SUCCESS) {
rcm_log_message(RCM_DEBUG,
"VLAN: consumers agreed on offline\n");
} else {
vlan_log_err(node->vc_linkid, errorp,
"consumers failed to offline");
(void) mutex_unlock(&cache_lock);
return (RCM_FAILURE);
}
/* Check if it's a query */
if (flags & RCM_QUERY) {
rcm_log_message(RCM_TRACE1,
"VLAN: offline query succeeded(%s)\n", rsrc);
(void) mutex_unlock(&cache_lock);
return (RCM_SUCCESS);
}
if (vlan_offline_vlan(node, VLAN_OFFLINED, CACHE_NODE_OFFLINED) !=
RCM_SUCCESS) {
vlan_online_vlan(node);
vlan_log_err(node->vc_linkid, errorp, "offline failed");
(void) mutex_unlock(&cache_lock);
return (RCM_FAILURE);
}
rcm_log_message(RCM_TRACE1, "VLAN: Offline succeeded(%s)\n", rsrc);
(void) mutex_unlock(&cache_lock);
return (RCM_SUCCESS);
}
/*
* vlan_undo_offline() - Undo offline of a previously offlined node.
*/
/*ARGSUSED*/
static int
vlan_undo_offline(rcm_handle_t *hd, char *rsrc, id_t id, uint_t flags,
char **errorp, rcm_info_t **info)
{
link_cache_t *node;
rcm_log_message(RCM_TRACE1, "VLAN: online(%s)\n", rsrc);
(void) mutex_lock(&cache_lock);
node = cache_lookup(hd, rsrc, CACHE_NO_REFRESH);
if (node == NULL) {
vlan_log_err(DATALINK_INVALID_LINKID, errorp, "no such link");
(void) mutex_unlock(&cache_lock);
errno = ENOENT;
return (RCM_FAILURE);
}
/* Check if no attempt should be made to online the link here */
if (!(node->vc_state & CACHE_NODE_OFFLINED)) {
vlan_log_err(node->vc_linkid, errorp, "link not offlined");
(void) mutex_unlock(&cache_lock);
errno = ENOTSUP;
return (RCM_SUCCESS);
}
vlan_online_vlan(node);
/*
* Inform IP interfaces on associated VLANs to be onlined
*/
vlan_consumer_online(hd, node, errorp, flags, info);
node->vc_state &= ~CACHE_NODE_OFFLINED;
rcm_log_message(RCM_TRACE1, "VLAN: online succeeded(%s)\n", rsrc);
(void) mutex_unlock(&cache_lock);
return (RCM_SUCCESS);
}
static void
vlan_online_vlan(link_cache_t *node)
{
dl_vlan_t *vlan;
dladm_status_t status;
char errmsg[DLADM_STRSIZE];
/*
* Try to bring on all offlined VLANs
*/
for (vlan = node->vc_vlan; vlan != NULL; vlan = vlan->dv_next) {
if (!(vlan->dv_flags & VLAN_OFFLINED))
continue;
if ((status = dladm_vlan_up(dld_handle, vlan->dv_vlanid)) !=
DLADM_STATUS_OK) {
/*
* Print a warning message and continue to online
* other VLANs.
*/
rcm_log_message(RCM_WARNING,
_("VLAN: VLAN online failed (%u): %s\n"),
vlan->dv_vlanid, dladm_status2str(status, errmsg));
} else {
vlan->dv_flags &= ~VLAN_OFFLINED;
}
}
}
static int
vlan_offline_vlan(link_cache_t *node, uint32_t flags, cache_node_state_t state)
{
dl_vlan_t *vlan;
dladm_status_t status;
char errmsg[DLADM_STRSIZE];
rcm_log_message(RCM_TRACE2, "VLAN: vlan_offline_vlan (%s %u %u)\n",
node->vc_resource, flags, state);
/*
* Try to delete all explicit created VLAN
*/
for (vlan = node->vc_vlan; vlan != NULL; vlan = vlan->dv_next) {
if ((status = dladm_vlan_delete(dld_handle, vlan->dv_vlanid,
DLADM_OPT_ACTIVE)) != DLADM_STATUS_OK) {
rcm_log_message(RCM_WARNING,
_("VLAN: VLAN offline failed (%u): %s\n"),
vlan->dv_vlanid, dladm_status2str(status, errmsg));
return (RCM_FAILURE);
} else {
rcm_log_message(RCM_TRACE1,
"VLAN: VLAN offline succeeded(%u)\n",
vlan->dv_vlanid);
vlan->dv_flags |= flags;
}
}
node->vc_state |= state;
return (RCM_SUCCESS);
}
/*
* vlan_get_info() - Gather usage information for this resource.
*/
/*ARGSUSED*/
int
vlan_get_info(rcm_handle_t *hd, char *rsrc, id_t id, uint_t flags,
char **usagep, char **errorp, nvlist_t *props, rcm_info_t **info)
{
link_cache_t *node;
rcm_log_message(RCM_TRACE1, "VLAN: get_info(%s)\n", rsrc);
(void) mutex_lock(&cache_lock);
node = cache_lookup(hd, rsrc, CACHE_REFRESH);
if (node == NULL) {
rcm_log_message(RCM_INFO,
_("VLAN: get_info(%s) unrecognized resource\n"), rsrc);
(void) mutex_unlock(&cache_lock);
errno = ENOENT;
return (RCM_FAILURE);
}
*usagep = vlan_usage(node);
(void) mutex_unlock(&cache_lock);
if (*usagep == NULL) {
/* most likely malloc failure */
rcm_log_message(RCM_ERROR,
_("VLAN: get_info(%s) malloc failure\n"), rsrc);
(void) mutex_unlock(&cache_lock);
errno = ENOMEM;
return (RCM_FAILURE);
}
/* Set client/role properties */
(void) nvlist_add_string(props, RCM_CLIENT_NAME, "VLAN");
rcm_log_message(RCM_TRACE1, "VLAN: get_info(%s) info = %s\n",
rsrc, *usagep);
return (RCM_SUCCESS);
}
/*
* vlan_suspend() - Nothing to do, always okay
*/
/*ARGSUSED*/
static int
vlan_suspend(rcm_handle_t *hd, char *rsrc, id_t id, timespec_t *interval,
uint_t flags, char **errorp, rcm_info_t **info)
{
rcm_log_message(RCM_TRACE1, "VLAN: suspend(%s)\n", rsrc);
return (RCM_SUCCESS);
}
/*
* vlan_resume() - Nothing to do, always okay
*/
/*ARGSUSED*/
static int
vlan_resume(rcm_handle_t *hd, char *rsrc, id_t id, uint_t flags,
char **errorp, rcm_info_t **info)
{
rcm_log_message(RCM_TRACE1, "VLAN: resume(%s)\n", rsrc);
return (RCM_SUCCESS);
}
/*
* vlan_consumer_remove()
*
* Notify VLAN consumers to remove cache.
*/
static int
vlan_consumer_remove(rcm_handle_t *hd, link_cache_t *node, uint_t flags,
rcm_info_t **info)
{
dl_vlan_t *vlan = NULL;
char rsrc[RCM_LINK_RESOURCE_MAX];
int ret = RCM_SUCCESS;
rcm_log_message(RCM_TRACE2, "VLAN: vlan_consumer_remove (%s)\n",
node->vc_resource);
for (vlan = node->vc_vlan; vlan != NULL; vlan = vlan->dv_next) {
/*
* This will only be called when the offline operation
* succeeds, so the VLAN consumers must have been offlined
* at this point.
*/
assert(vlan->dv_flags & VLAN_CONSUMER_OFFLINED);
(void) snprintf(rsrc, RCM_LINK_RESOURCE_MAX, "%s/%u",
RCM_LINK_PREFIX, vlan->dv_vlanid);
ret = rcm_notify_remove(hd, rsrc, flags, info);
if (ret != RCM_SUCCESS) {
rcm_log_message(RCM_WARNING,
_("VLAN: notify remove failed (%s)\n"), rsrc);
break;
}
}
rcm_log_message(RCM_TRACE2, "VLAN: vlan_consumer_remove done\n");
return (ret);
}
/*
* vlan_remove() - remove a resource from cache
*/
/*ARGSUSED*/
static int
vlan_remove(rcm_handle_t *hd, char *rsrc, id_t id, uint_t flags,
char **errorp, rcm_info_t **info)
{
link_cache_t *node;
int rv;
rcm_log_message(RCM_TRACE1, "VLAN: remove(%s)\n", rsrc);
(void) mutex_lock(&cache_lock);
node = cache_lookup(hd, rsrc, CACHE_NO_REFRESH);
if (node == NULL) {
rcm_log_message(RCM_INFO,
_("VLAN: remove(%s) unrecognized resource\n"), rsrc);
(void) mutex_unlock(&cache_lock);
errno = ENOENT;
return (RCM_FAILURE);
}
/* remove the cached entry for the resource */
cache_remove(node);
(void) mutex_unlock(&cache_lock);
rv = vlan_consumer_remove(hd, node, flags, info);
node_free(node);
return (rv);
}
/*
* vlan_notify_event - Project private implementation to receive new resource
* events. It intercepts all new resource events. If the
* new resource is a network resource, pass up a notify
* for it too. The new resource need not be cached, since
* it is done at register again.
*/
/*ARGSUSED*/
static int
vlan_notify_event(rcm_handle_t *hd, char *rsrc, id_t id, uint_t flags,
char **errorp, nvlist_t *nvl, rcm_info_t **info)
{
nvpair_t *nvp = NULL;
datalink_id_t linkid;
uint64_t id64;
int rv = RCM_SUCCESS;
rcm_log_message(RCM_TRACE1, "VLAN: notify_event(%s)\n", rsrc);
if (strcmp(rsrc, RCM_RESOURCE_LINK_NEW) != 0) {
vlan_log_err(DATALINK_INVALID_LINKID, errorp,
"unrecognized event");
errno = EINVAL;
return (RCM_FAILURE);
}
/* Update cache to reflect latest VLANs */
if (cache_update(hd) < 0) {
vlan_log_err(DATALINK_INVALID_LINKID, errorp,
"private Cache update failed");
return (RCM_FAILURE);
}
/*
* Try best to recover all configuration.
*/
rcm_log_message(RCM_DEBUG, "VLAN: process_nvlist\n");
while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
if (strcmp(nvpair_name(nvp), RCM_NV_LINKID) != 0)
continue;
if (nvpair_value_uint64(nvp, &id64) != 0) {
vlan_log_err(DATALINK_INVALID_LINKID, errorp,
"cannot get linkid");
rv = RCM_FAILURE;
continue;
}
linkid = (datalink_id_t)id64;
if (vlan_configure(hd, linkid) != 0) {
vlan_log_err(linkid, errorp, "configuring failed");
rv = RCM_FAILURE;
continue;
}
/* Notify all VLAN consumers */
if (vlan_consumer_notify(hd, linkid, errorp, flags,
info) != 0) {
vlan_log_err(linkid, errorp, "consumer notify failed");
rv = RCM_FAILURE;
}
}
rcm_log_message(RCM_TRACE1,
"VLAN: notify_event: link configuration complete\n");
return (rv);
}
/*
* vlan_usage - Determine the usage of a link.
* The returned buffer is owned by caller, and the caller
* must free it up when done.
*/
static char *
vlan_usage(link_cache_t *node)
{
dl_vlan_t *vlan;
int nvlan;
char *buf;
const char *fmt;
char *sep;
char errmsg[DLADM_STRSIZE];
char name[MAXLINKNAMELEN];
dladm_status_t status;
size_t bufsz;
rcm_log_message(RCM_TRACE2, "VLAN: usage(%s)\n", node->vc_resource);
assert(MUTEX_HELD(&cache_lock));
if ((status = dladm_datalink_id2info(dld_handle, node->vc_linkid, NULL,
NULL, NULL, name, sizeof (name))) != DLADM_STATUS_OK) {
rcm_log_message(RCM_ERROR,
_("VLAN: usage(%s) get link name failure(%s)\n"),
node->vc_resource, dladm_status2str(status, errmsg));
return (NULL);
}
if (node->vc_state & CACHE_NODE_OFFLINED)
fmt = _("%1$s offlined");
else
fmt = _("%1$s VLANs: ");
/* TRANSLATION_NOTE: separator used between VLAN linkids */
sep = _(", ");
nvlan = 0;
for (vlan = node->vc_vlan; vlan != NULL; vlan = vlan->dv_next)
nvlan++;
/* space for VLANs and separators, plus message */
bufsz = nvlan * (MAXLINKNAMELEN + strlen(sep)) +
strlen(fmt) + MAXLINKNAMELEN + 1;
if ((buf = malloc(bufsz)) == NULL) {
rcm_log_message(RCM_ERROR,
_("VLAN: usage(%s) malloc failure(%s)\n"),
node->vc_resource, strerror(errno));
return (NULL);
}
(void) snprintf(buf, bufsz, fmt, name);
if (node->vc_state & CACHE_NODE_OFFLINED) {
/* Nothing else to do */
rcm_log_message(RCM_TRACE2, "VLAN: usage (%s) info = %s\n",
node->vc_resource, buf);
return (buf);
}
for (vlan = node->vc_vlan; vlan != NULL; vlan = vlan->dv_next) {
rcm_log_message(RCM_DEBUG, "VLAN:= %u\n", vlan->dv_vlanid);
if ((status = dladm_datalink_id2info(dld_handle,
vlan->dv_vlanid, NULL, NULL, NULL, name,
sizeof (name))) != DLADM_STATUS_OK) {
rcm_log_message(RCM_ERROR,
_("VLAN: usage(%s) get vlan %u name failure(%s)\n"),
node->vc_resource, vlan->dv_vlanid,
dladm_status2str(status, errmsg));
free(buf);
return (NULL);
}
(void) strlcat(buf, name, bufsz);
if (vlan->dv_next != NULL)
(void) strlcat(buf, sep, bufsz);
}
rcm_log_message(RCM_TRACE2, "VLAN: usage (%s) info = %s\n",
node->vc_resource, buf);
return (buf);
}
/*
* Cache management routines, all cache management functions should be
* be called with cache_lock held.
*/
/*
* cache_lookup() - Get a cache node for a resource.
* Call with cache lock held.
*
* This ensures that the cache is consistent with the system state and
* returns a pointer to the cache element corresponding to the resource.
*/
static link_cache_t *
cache_lookup(rcm_handle_t *hd, char *rsrc, char options)
{
link_cache_t *node;
rcm_log_message(RCM_TRACE2, "VLAN: cache lookup(%s)\n", rsrc);
assert(MUTEX_HELD(&cache_lock));
if (options & CACHE_REFRESH) {
/* drop lock since update locks cache again */
(void) mutex_unlock(&cache_lock);
(void) cache_update(hd);
(void) mutex_lock(&cache_lock);
}
node = cache_head.vc_next;
for (; node != &cache_tail; node = node->vc_next) {
if (strcmp(rsrc, node->vc_resource) == 0) {
rcm_log_message(RCM_TRACE2,
"VLAN: cache lookup succeeded(%s)\n", rsrc);
return (node);
}
}
return (NULL);
}
/*
* node_free - Free a node from the cache
*/
static void
node_free(link_cache_t *node)
{
dl_vlan_t *vlan, *next;
if (node != NULL) {
free(node->vc_resource);
/* free the VLAN list */
for (vlan = node->vc_vlan; vlan != NULL; vlan = next) {
next = vlan->dv_next;
free(vlan);
}
free(node);
}
}
/*
* cache_insert - Insert a resource node in cache
*/
static void
cache_insert(link_cache_t *node)
{
assert(MUTEX_HELD(&cache_lock));
/* insert at the head for best performance */
node->vc_next = cache_head.vc_next;
node->vc_prev = &cache_head;
node->vc_next->vc_prev = node;
node->vc_prev->vc_next = node;
}
/*
* cache_remove() - Remove a resource node from cache.
*/
static void
cache_remove(link_cache_t *node)
{
assert(MUTEX_HELD(&cache_lock));
node->vc_next->vc_prev = node->vc_prev;
node->vc_prev->vc_next = node->vc_next;
node->vc_next = NULL;
node->vc_prev = NULL;
}
typedef struct vlan_update_arg_s {
rcm_handle_t *hd;
int retval;
} vlan_update_arg_t;
/*
* vlan_update() - Update physical interface properties
*/
static int
vlan_update(dladm_handle_t handle, datalink_id_t vlanid, void *arg)
{
vlan_update_arg_t *vlan_update_argp = arg;
rcm_handle_t *hd = vlan_update_argp->hd;
link_cache_t *node;
dl_vlan_t *vlan;
char *rsrc;
dladm_vlan_attr_t vlan_attr;
dladm_status_t status;
char errmsg[DLADM_STRSIZE];
boolean_t newnode = B_FALSE;
int ret = -1;
rcm_log_message(RCM_TRACE2, "VLAN: vlan_update(%u)\n", vlanid);
assert(MUTEX_HELD(&cache_lock));
status = dladm_vlan_info(handle, vlanid, &vlan_attr, DLADM_OPT_ACTIVE);
if (status != DLADM_STATUS_OK) {
rcm_log_message(RCM_TRACE1,
"VLAN: vlan_update() cannot get vlan information for "
"%u(%s)\n", vlanid, dladm_status2str(status, errmsg));
return (DLADM_WALK_CONTINUE);
}
rsrc = malloc(RCM_LINK_RESOURCE_MAX);
if (rsrc == NULL) {
rcm_log_message(RCM_ERROR, _("VLAN: malloc error(%s): %u\n"),
strerror(errno), vlanid);
goto done;
}
(void) snprintf(rsrc, RCM_LINK_RESOURCE_MAX, "%s/%u",
RCM_LINK_PREFIX, vlan_attr.dv_linkid);
node = cache_lookup(hd, rsrc, CACHE_NO_REFRESH);
if (node != NULL) {
rcm_log_message(RCM_DEBUG,
"VLAN: %s already registered (vlanid:%d)\n",
rsrc, vlan_attr.dv_vid);
free(rsrc);
} else {
rcm_log_message(RCM_DEBUG,
"VLAN: %s is a new resource (vlanid:%d)\n",
rsrc, vlan_attr.dv_vid);
if ((node = calloc(1, sizeof (link_cache_t))) == NULL) {
free(rsrc);
rcm_log_message(RCM_ERROR, _("VLAN: calloc: %s\n"),
strerror(errno));
goto done;
}
node->vc_resource = rsrc;
node->vc_vlan = NULL;
node->vc_linkid = vlan_attr.dv_linkid;
node->vc_state |= CACHE_NODE_NEW;
newnode = B_TRUE;
}
for (vlan = node->vc_vlan; vlan != NULL; vlan = vlan->dv_next) {
if (vlan->dv_vlanid == vlanid) {
vlan->dv_flags &= ~VLAN_STALE;
break;
}
}
if (vlan == NULL) {
if ((vlan = calloc(1, sizeof (dl_vlan_t))) == NULL) {
rcm_log_message(RCM_ERROR, _("VLAN: malloc: %s\n"),
strerror(errno));
if (newnode) {
free(rsrc);
free(node);
}
goto done;
}
vlan->dv_vlanid = vlanid;
vlan->dv_next = node->vc_vlan;
vlan->dv_prev = NULL;
if (node->vc_vlan != NULL)
node->vc_vlan->dv_prev = vlan;
node->vc_vlan = vlan;
}
node->vc_state &= ~CACHE_NODE_STALE;
if (newnode)
cache_insert(node);
rcm_log_message(RCM_TRACE3, "VLAN: vlan_update: succeeded(%u)\n",
vlanid);
ret = 0;
done:
vlan_update_argp->retval = ret;
return (ret == 0 ? DLADM_WALK_CONTINUE : DLADM_WALK_TERMINATE);
}
/*
* vlan_update_all() - Determine all VLAN links in the system
*/
static int
vlan_update_all(rcm_handle_t *hd)
{
vlan_update_arg_t arg = {NULL, 0};
rcm_log_message(RCM_TRACE2, "VLAN: vlan_update_all\n");
assert(MUTEX_HELD(&cache_lock));
arg.hd = hd;
(void) dladm_walk_datalink_id(vlan_update, dld_handle, &arg,
DATALINK_CLASS_VLAN, DATALINK_ANY_MEDIATYPE, DLADM_OPT_ACTIVE);
return (arg.retval);
}
/*
* cache_update() - Update cache with latest interface info
*/
static int
cache_update(rcm_handle_t *hd)
{
link_cache_t *node, *nnode;
dl_vlan_t *vlan;
int rv;
rcm_log_message(RCM_TRACE2, "VLAN: cache_update\n");
(void) mutex_lock(&cache_lock);
/* first we walk the entire cache, marking each entry stale */
node = cache_head.vc_next;
for (; node != &cache_tail; node = node->vc_next) {
node->vc_state |= CACHE_NODE_STALE;
for (vlan = node->vc_vlan; vlan != NULL; vlan = vlan->dv_next)
vlan->dv_flags |= VLAN_STALE;
}
rv = vlan_update_all(hd);
/*
* Continue to delete all stale nodes from the cache even
* vlan_update_all() failed. Unregister link that are not offlined
* and still in cache
*/
for (node = cache_head.vc_next; node != &cache_tail; node = nnode) {
dl_vlan_t *vlan, *next;
for (vlan = node->vc_vlan; vlan != NULL; vlan = next) {
next = vlan->dv_next;
/* clear stale VLANs */
if (vlan->dv_flags & VLAN_STALE) {
if (vlan->dv_prev != NULL)
vlan->dv_prev->dv_next = next;
else
node->vc_vlan = next;
if (next != NULL)
next->dv_prev = vlan->dv_prev;
free(vlan);
}
}
nnode = node->vc_next;
if (node->vc_state & CACHE_NODE_STALE) {
(void) rcm_unregister_interest(hd, node->vc_resource,
0);
rcm_log_message(RCM_DEBUG, "VLAN: unregistered %s\n",
node->vc_resource);
assert(node->vc_vlan == NULL);
cache_remove(node);
node_free(node);
continue;
}
if (!(node->vc_state & CACHE_NODE_NEW))
continue;
if (rcm_register_interest(hd, node->vc_resource, 0, NULL) !=
RCM_SUCCESS) {
rcm_log_message(RCM_ERROR,
_("VLAN: failed to register %s\n"),
node->vc_resource);
rv = -1;
} else {
rcm_log_message(RCM_DEBUG, "VLAN: registered %s\n",
node->vc_resource);
node->vc_state &= ~CACHE_NODE_NEW;
}
}
(void) mutex_unlock(&cache_lock);
return (rv);
}
/*
* cache_free() - Empty the cache
*/
static void
cache_free()
{
link_cache_t *node;
rcm_log_message(RCM_TRACE2, "VLAN: cache_free\n");
(void) mutex_lock(&cache_lock);
node = cache_head.vc_next;
while (node != &cache_tail) {
cache_remove(node);
node_free(node);
node = cache_head.vc_next;
}
(void) mutex_unlock(&cache_lock);
}
/*
* vlan_log_err() - RCM error log wrapper
*/
static void
vlan_log_err(datalink_id_t linkid, char **errorp, char *errmsg)
{
char link[MAXLINKNAMELEN];
char errstr[DLADM_STRSIZE];
dladm_status_t status;
int len;
const char *errfmt;
char *error;
link[0] = '\0';
if (linkid != DATALINK_INVALID_LINKID) {
char rsrc[RCM_LINK_RESOURCE_MAX];
(void) snprintf(rsrc, sizeof (rsrc), "%s/%u",
RCM_LINK_PREFIX, linkid);
rcm_log_message(RCM_ERROR, _("VLAN: %s(%s)\n"), errmsg, rsrc);
if ((status = dladm_datalink_id2info(dld_handle, linkid, NULL,
NULL, NULL, link, sizeof (link))) != DLADM_STATUS_OK) {
rcm_log_message(RCM_WARNING,
_("VLAN: cannot get link name for (%s) %s\n"),
rsrc, dladm_status2str(status, errstr));
}
} else {
rcm_log_message(RCM_ERROR, _("VLAN: %s\n"), errmsg);
}
errfmt = strlen(link) > 0 ? _("VLAN: %s(%s)") : _("VLAN: %s");
len = strlen(errfmt) + strlen(errmsg) + MAXLINKNAMELEN + 1;
if ((error = malloc(len)) != NULL) {
if (strlen(link) > 0)
(void) snprintf(error, len, errfmt, errmsg, link);
else
(void) snprintf(error, len, errfmt, errmsg);
}
if (errorp != NULL)
*errorp = error;
}
/*
* vlan_consumer_online()
*
* Notify online to VLAN consumers.
*/
/* ARGSUSED */
static void
vlan_consumer_online(rcm_handle_t *hd, link_cache_t *node, char **errorp,
uint_t flags, rcm_info_t **info)
{
dl_vlan_t *vlan;
char rsrc[RCM_LINK_RESOURCE_MAX];
rcm_log_message(RCM_TRACE2, "VLAN: vlan_consumer_online (%s)\n",
node->vc_resource);
for (vlan = node->vc_vlan; vlan != NULL; vlan = vlan->dv_next) {
if (!(vlan->dv_flags & VLAN_CONSUMER_OFFLINED))
continue;
(void) snprintf(rsrc, RCM_LINK_RESOURCE_MAX, "%s/%u",
RCM_LINK_PREFIX, vlan->dv_vlanid);
if (rcm_notify_online(hd, rsrc, flags, info) == RCM_SUCCESS)
vlan->dv_flags &= ~VLAN_CONSUMER_OFFLINED;
}
rcm_log_message(RCM_TRACE2, "VLAN: vlan_consumer_online done\n");
}
/*
* vlan_consumer_offline()
*
* Offline VLAN consumers.
*/
static int
vlan_consumer_offline(rcm_handle_t *hd, link_cache_t *node, char **errorp,
uint_t flags, rcm_info_t **info)
{
dl_vlan_t *vlan;
char rsrc[RCM_LINK_RESOURCE_MAX];
int ret = RCM_SUCCESS;
rcm_log_message(RCM_TRACE2, "VLAN: vlan_consumer_offline (%s)\n",
node->vc_resource);
for (vlan = node->vc_vlan; vlan != NULL; vlan = vlan->dv_next) {
(void) snprintf(rsrc, RCM_LINK_RESOURCE_MAX, "%s/%u",
RCM_LINK_PREFIX, vlan->dv_vlanid);
ret = rcm_request_offline(hd, rsrc, flags, info);
if (ret != RCM_SUCCESS)
break;
vlan->dv_flags |= VLAN_CONSUMER_OFFLINED;
}
if (vlan != NULL)
vlan_consumer_online(hd, node, errorp, flags, info);
rcm_log_message(RCM_TRACE2, "VLAN: vlan_consumer_offline done\n");
return (ret);
}
/*
* Send RCM_RESOURCE_LINK_NEW events to other modules about new VLANs.
* Return 0 on success, -1 on failure.
*/
static int
vlan_notify_new_vlan(rcm_handle_t *hd, char *rsrc)
{
link_cache_t *node;
dl_vlan_t *vlan;
nvlist_t *nvl = NULL;
uint64_t id;
int ret = -1;
rcm_log_message(RCM_TRACE2, "VLAN: vlan_notify_new_vlan (%s)\n", rsrc);
(void) mutex_lock(&cache_lock);
if ((node = cache_lookup(hd, rsrc, CACHE_REFRESH)) == NULL) {
(void) mutex_unlock(&cache_lock);
return (0);
}
if (nvlist_alloc(&nvl, 0, 0) != 0) {
(void) mutex_unlock(&cache_lock);
rcm_log_message(RCM_WARNING,
_("VLAN: failed to allocate nvlist\n"));
goto done;
}
for (vlan = node->vc_vlan; vlan != NULL; vlan = vlan->dv_next) {
rcm_log_message(RCM_TRACE2,
"VLAN: vlan_notify_new_vlan add (%u)\n",
vlan->dv_vlanid);
id = vlan->dv_vlanid;
if (nvlist_add_uint64(nvl, RCM_NV_LINKID, id) != 0) {
rcm_log_message(RCM_ERROR,
_("VLAN: failed to construct nvlist\n"));
(void) mutex_unlock(&cache_lock);
goto done;
}
}
(void) mutex_unlock(&cache_lock);
if (rcm_notify_event(hd, RCM_RESOURCE_LINK_NEW, 0, nvl, NULL) !=
RCM_SUCCESS) {
rcm_log_message(RCM_ERROR,
_("VLAN: failed to notify %s event for %s\n"),
RCM_RESOURCE_LINK_NEW, node->vc_resource);
goto done;
}
ret = 0;
done:
if (nvl != NULL)
nvlist_free(nvl);
return (ret);
}
/*
* vlan_consumer_notify() - Notify consumers of VLANs coming back online.
*/
static int
vlan_consumer_notify(rcm_handle_t *hd, datalink_id_t linkid, char **errorp,
uint_t flags, rcm_info_t **info)
{
char rsrc[RCM_LINK_RESOURCE_MAX];
link_cache_t *node;
/* Check for the interface in the cache */
(void) snprintf(rsrc, RCM_LINK_RESOURCE_MAX, "%s/%u", RCM_LINK_PREFIX,
linkid);
rcm_log_message(RCM_TRACE2, "VLAN: vlan_consumer_notify(%s)\n", rsrc);
/*
* Inform IP consumers of the new link.
*/
if (vlan_notify_new_vlan(hd, rsrc) != 0) {
(void) mutex_lock(&cache_lock);
if ((node = cache_lookup(hd, rsrc, CACHE_NO_REFRESH)) != NULL) {
(void) vlan_offline_vlan(node, VLAN_STALE,
CACHE_NODE_STALE);
}
(void) mutex_unlock(&cache_lock);
rcm_log_message(RCM_TRACE2,
"VLAN: vlan_notify_new_vlan failed(%s)\n", rsrc);
return (-1);
}
rcm_log_message(RCM_TRACE2, "VLAN: vlan_consumer_notify succeeded\n");
return (0);
}
typedef struct vlan_up_arg_s {
datalink_id_t linkid;
int retval;
} vlan_up_arg_t;
static int
vlan_up(dladm_handle_t handle, datalink_id_t vlanid, void *arg)
{
vlan_up_arg_t *vlan_up_argp = arg;
dladm_status_t status;
dladm_vlan_attr_t vlan_attr;
char errmsg[DLADM_STRSIZE];
status = dladm_vlan_info(handle, vlanid, &vlan_attr, DLADM_OPT_PERSIST);
if (status != DLADM_STATUS_OK) {
rcm_log_message(RCM_TRACE1,
"VLAN: vlan_up(): cannot get information for VLAN %u "
"(%s)\n", vlanid, dladm_status2str(status, errmsg));
return (DLADM_WALK_CONTINUE);
}
if (vlan_attr.dv_linkid != vlan_up_argp->linkid)
return (DLADM_WALK_CONTINUE);
rcm_log_message(RCM_TRACE3, "VLAN: vlan_up(%u)\n", vlanid);
if ((status = dladm_vlan_up(handle, vlanid)) == DLADM_STATUS_OK)
return (DLADM_WALK_CONTINUE);
/*
* Prompt the warning message and continue to UP other VLANs.
*/
rcm_log_message(RCM_WARNING,
_("VLAN: VLAN up failed (%u): %s\n"),
vlanid, dladm_status2str(status, errmsg));
vlan_up_argp->retval = -1;
return (DLADM_WALK_CONTINUE);
}
/*
* vlan_configure() - Configure VLANs over a physical link after it attaches
*/
static int
vlan_configure(rcm_handle_t *hd, datalink_id_t linkid)
{
char rsrc[RCM_LINK_RESOURCE_MAX];
link_cache_t *node;
vlan_up_arg_t arg = {DATALINK_INVALID_LINKID, 0};
/* Check for the VLANs in the cache */
(void) snprintf(rsrc, sizeof (rsrc), "%s/%u", RCM_LINK_PREFIX, linkid);
rcm_log_message(RCM_TRACE2, "VLAN: vlan_configure(%s)\n", rsrc);
/* Check if the link is new or was previously offlined */
(void) mutex_lock(&cache_lock);
if (((node = cache_lookup(hd, rsrc, CACHE_REFRESH)) != NULL) &&
(!(node->vc_state & CACHE_NODE_OFFLINED))) {
rcm_log_message(RCM_TRACE2,
"VLAN: Skipping configured interface(%s)\n", rsrc);
(void) mutex_unlock(&cache_lock);
return (0);
}
(void) mutex_unlock(&cache_lock);
arg.linkid = linkid;
(void) dladm_walk_datalink_id(vlan_up, dld_handle, &arg,
DATALINK_CLASS_VLAN, DATALINK_ANY_MEDIATYPE, DLADM_OPT_PERSIST);
if (arg.retval == 0) {
rcm_log_message(RCM_TRACE2,
"VLAN: vlan_configure succeeded(%s)\n", rsrc);
}
return (arg.retval);
}