usr.lib/bridged/door.c

4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai/*
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * CDDL HEADER START
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai *
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * The contents of this file are subject to the terms of the
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * Common Development and Distribution License (the "License").
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * You may not use this file except in compliance with the License.
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai *
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * or http://www.opensolaris.org/os/licensing.
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * See the License for the specific language governing permissions
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * and limitations under the License.
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai *
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * When distributing Covered Code, include this CDDL HEADER in each
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4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * CDDL HEADER END
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai/*
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * Use is subject to license terms.
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai/*
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * bridged - bridging control daemon.  This module provides the door-based
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * interface used by user applications to gather bridge status information.
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#include <stdio.h>
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#include <stdlib.h>
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#include <unistd.h>
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#include <fcntl.h>
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#include <sys/stat.h>
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#include <sys/types.h>
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#include <syslog.h>
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#include <door.h>
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#include <errno.h>
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#include <alloca.h>
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#include <libdlpi.h>
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#include <libdlbridge.h>
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#include <stp_in.h>
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#include <net/bridge.h>
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#include "global.h"
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#define DOOR_DIRMODE    0755
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#define DOOR_FILEMODE   0444
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavaistatic int door_fd = -1;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavaistatic char doorname[MAXPATHLEN];
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai/*ARGSUSED*/
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavaistatic void
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavaibridge_door_server(void *cookie, char *argp, size_t arg_size, door_desc_t *dp,
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    uint_t ndesc)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai{
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    /* LINTED: alignment */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    bridge_door_cmd_t *bdc = (bridge_door_cmd_t *)argp;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    int retv = EINVAL;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    bridge_door_cfg_t bdcf;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    UID_STP_STATE_T smstate;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    UID_STP_PORT_CFG_T portcfg;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    UID_STP_PORT_STATE_T portstate;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    struct portdata *pdp;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    int twoints[2];
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    if (arg_size < sizeof (*bdc) || lock_engine() != 0) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        (void) door_return((char *)&retv, sizeof (retv), NULL, 0);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        return;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    switch (bdc->bdc_type) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    case bdcBridgeGetConfig:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        if ((retv = STP_IN_stpm_get_cfg(0, &bdcf.bdcf_cfg)) != 0)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai            break;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        bdcf.bdcf_prot = protect;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        unlock_engine();
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        (void) door_return((char *)&bdcf, sizeof (bdcf), NULL, 0);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        return;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    case bdcBridgeGetState:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        if ((retv = STP_IN_stpm_get_state(0, &smstate)) != 0)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai            break;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        unlock_engine();
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        (void) door_return((char *)&smstate, sizeof (smstate), NULL, 0);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        return;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    case bdcBridgeGetPorts: {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        datalink_id_t *dlp;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        int *rbuf;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        size_t rlen;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        int i, nports;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        if (nextport == 0) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai            twoints[0] = 0;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai            rbuf = twoints;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai            rlen = sizeof (twoints);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        } else {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai            rlen = sizeof (int) + nextport * sizeof (datalink_id_t);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai            rbuf = alloca(rlen);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai            dlp = (datalink_id_t *)(rbuf + 1);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai            for (i = nports = 0; i < nextport; i++) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai                if (allports[i]->kern_added)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai                    dlp[nports++] = allports[i]->linkid;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai            }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai            rbuf[0] = nports;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai            rlen = sizeof (int) + nports * sizeof (datalink_id_t);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        unlock_engine();
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        (void) door_return((char *)rbuf, rlen, NULL, 0);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        return;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    case bdcBridgeGetRefreshCount:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        twoints[0] = refresh_count;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        twoints[1] = 0;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        unlock_engine();
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        (void) door_return((char *)twoints, sizeof (twoints), NULL, 0);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        return;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    case bdcPortGetConfig:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        if ((pdp = find_by_linkid(bdc->bdc_linkid)) == NULL)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai            break;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        retv = STP_IN_port_get_cfg(0, pdp->port_index, &portcfg);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        if (retv != 0)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai            break;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        unlock_engine();
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        (void) door_return((char *)&portcfg, sizeof (portcfg), NULL, 0);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        return;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    case bdcPortGetState:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        if ((pdp = find_by_linkid(bdc->bdc_linkid)) == NULL)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai            break;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        portstate.port_no = pdp->port_index;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        if ((retv = STP_IN_port_get_state(0, &portstate)) != 0)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai            break;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        if (pdp->sdu_failed)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai            portstate.state = UID_PORT_BADSDU;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        else if (protect != DLADM_BRIDGE_PROT_STP)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai            portstate.state = UID_PORT_NON_STP;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        else if (pdp->admin_non_stp && pdp->bpdu_protect)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai            portstate.state = UID_PORT_DISABLED;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        unlock_engine();
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        (void) door_return((char *)&portstate, sizeof (portstate),
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai            NULL, 0);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        return;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    case bdcPortGetForwarding:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        if ((pdp = find_by_linkid(bdc->bdc_linkid)) == NULL)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai            break;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        twoints[0] = pdp->admin_status ? 1 : 0;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        twoints[1] = 0;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        unlock_engine();
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        (void) door_return((char *)twoints, sizeof (twoints), NULL, 0);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        return;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    unlock_engine();
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    (void) door_return((char *)&retv, sizeof (retv), NULL, 0);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai}
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavaistatic void
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavaicleanup_door(void)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai{
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    if (door_fd != -1) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        (void) door_revoke(door_fd);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        door_fd = -1;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    if (doorname[0] != '\0') {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        (void) unlink(doorname);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        doorname[0] = '\0';
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai}
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavaivoid
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavaiinit_door(void)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai{
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    int fd;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    /* Make sure that the control directory exists */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    (void) mkdir(DOOR_DIRNAME, DOOR_DIRMODE);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    /* Each instance gets a separate door. */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    (void) snprintf(doorname, sizeof (doorname), "%s/%s", DOOR_DIRNAME,
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        instance_name);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    /* Do a low-overhead "touch" on the file that will be the door node. */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    fd = open(doorname,
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        O_RDWR | O_CREAT | O_EXCL | O_NOFOLLOW | O_NONBLOCK,
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        DOOR_FILEMODE);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    if (fd != -1) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        (void) close(fd);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    } else if (errno != EEXIST) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        syslog(LOG_ERR, "unable to create control door node: %m");
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        exit(EXIT_FAILURE);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    (void) atexit(cleanup_door);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    /* Create the door. */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    door_fd = door_create(bridge_door_server, NULL,
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        DOOR_REFUSE_DESC | DOOR_NO_CANCEL);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    if (door_fd == -1) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        syslog(LOG_ERR, "unable to create control door: %m");
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        exit(EXIT_FAILURE);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    /* Attach the door to the file. */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    (void) fdetach(doorname);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    if (fattach(door_fd, doorname) == -1) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        syslog(LOG_ERR, "unable to attach control door: %m");
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        exit(EXIT_FAILURE);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai}