C++ di_devfs_path函数代码示例

/*
 * handle case where device has been probed but its target driver is not
 * attached so enumeration has not quite finished. Opening the /devices
 * pathname will force the kernel to finish the enumeration process and
 * let us get the data we need.
 */
static void
get_devid(di_node_t node, ddi_devid_t *thisdevid)
{
	int fd;
	char realpath[MAXPATHLEN];
	char *openpath = di_devfs_path(node);

	errno = 0;
	bzero(realpath, MAXPATHLEN);
	if (strstr(openpath, "/devices") == NULL) {
		(void) snprintf(realpath, MAXPATHLEN,
		    "/devices%s:c,raw", openpath);
		fd = open(realpath, O_RDONLY|O_NDELAY);
	} else {
		fd = open(openpath, O_RDONLY|O_NDELAY);
	}

	if (fd < 0) {
		logmsg(MSG_INFO, "Unable to open path %s: %s\n",
		    openpath, strerror(errno));
		return;
	}

	if (devid_get(fd, thisdevid) != 0) {
		logmsg(MSG_INFO,
		    "'%s' node (%s) without a devid registered\n",
		    di_driver_name(node), di_devfs_path(node));
	}
	(void) close(fd);
}

/*
 * This function is called for every dcam1394 minor node.
 * Calls enumerate to assign a logical dcam1394 id, and then
 * devfsadm_mklink to make the link.
 */
static int
dcam1394_process(di_minor_t minor, di_node_t node)
{
	char m_name[PATH_MAX], restring0[DCAM_RE_STRING_LEN];
	char l_path[PATH_MAX], p_path[PATH_MAX], *buf, *devfspath;
	devfsadm_enumerate_t re[1];

	(void) strcpy(m_name, di_minor_name(minor));

	if (strcmp(di_driver_name(node), "dcam1394") != 0) {
	    return (DEVFSADM_CONTINUE);
	}

	if (strncmp(m_name, "dcamctl", 7) == 0) {
		(void) snprintf(restring0, DCAM_RE_STRING_LEN,
				DCAM_CTL_LINK_RE);
	} else if (strncmp(m_name, "dcam", 4) == 0) {
		(void) snprintf(restring0, DCAM_RE_STRING_LEN,
				DCAM_STR_LINK_RE);
	} else {
		return (DEVFSADM_CONTINUE);
	}

	re[0].re	= restring0;
	re[0].subexp	= 1;
	re[0].flags	= MATCH_ALL;

	devfsadm_print(debug_mid,
	    "dcam1394_process: path %s\n", di_devfs_path(node));

	(void) strcpy(p_path, devfspath = di_devfs_path(node));
	(void) strcat(p_path, ":");
	(void) strcat(p_path, di_minor_name(minor));
	di_devfs_path_free(devfspath);

	/*
	 * Build the physical path from the components, omitting
	 * minor name field.  Find the logical dcam1394 id, and
	 * stuff it in buf.
	 */
	if (devfsadm_enumerate_int(p_path, 0, &buf, re, 1)) {
		devfsadm_print(debug_mid,
		    "dcam1394_process: exit/continue\n");
		return (DEVFSADM_CONTINUE);
	}

	devfsadm_print(debug_mid, "dcam1394_process: p_path=%s buf=%s\n",
	    p_path, buf);

	if (strncmp(di_minor_name(minor), "dcamctl", 7) == 0)
		(void) snprintf(l_path, PATH_MAX, "dcamctl%s", buf);
	else
		(void) snprintf(l_path, PATH_MAX, "dcam%s", buf);

	(void) devfsadm_mklink(l_path, node, minor, 0);

	free(buf);

	return (DEVFSADM_CONTINUE);
}

/*
 * According to devfs path name, it will print device node name.
 */
static void
print_node_name(char *drv_name, char *strdevfspath)
{
	di_node_t	curnode;
	char *devfspath = NULL;
	char *node_name = NULL;

	curnode = di_drv_first_node(drv_name, devinfo_root);
	for (; curnode != DI_NODE_NIL; curnode = di_drv_next_node(curnode)) {
		devfspath = di_devfs_path(curnode);
		logmsg(MSG_INFO, "find: devfspath %s\n", devfspath);

		if (devfspath == NULL)
			continue;

		if ((strlen(strdevfspath) == strlen(devfspath)) &&
		    (strncmp(strdevfspath, devfspath,
		    strlen(devfspath)) == 0)) {
			node_name = find_link(curnode);
			if (node_name == NULL) {
				(void) printf("NOT MAPPED\n");
			} else {
				(void) printf("%s\n", node_name);
			}
			return;
		}
	}
}

/*
 * Handles:
 *	/dev/av/[0-9]+/(async|isoch)
 */
static int
av_create(di_minor_t minor, di_node_t node)
{
	devfsadm_enumerate_t rules[1] = {"^av$/^([0-9]+)$", 1, MATCH_ADDR};
	char	*minor_str;
	char	path[PATH_MAX + 1];
	char	*buf;

	if ((buf = di_devfs_path(node)) == NULL) {
		return (DEVFSADM_CONTINUE);
	}

	minor_str = di_minor_name(minor);
	(void) snprintf(path, sizeof (path), "%s:%s", buf, minor_str);
	di_devfs_path_free(buf);

	if (devfsadm_enumerate_int(path, 0, &buf, rules, 1)) {
		return (DEVFSADM_CONTINUE);
	}

	(void) snprintf(path, sizeof (path), "av/%s/%s", buf, minor_str);
	free(buf);

	(void) devfsadm_mklink(path, node, minor, 0);

	return (DEVFSADM_CONTINUE);
}

/*
 * Onboard dialout devices
 * Creates links of the form "/dev/cua/[a..z]"
 */
static int
onbrd_dialout_create(di_minor_t minor, di_node_t node)
{
	char l_path[MAXPATHLEN], p_path[MAXPATHLEN];
	char  *devfspath, *buf, *mn;

	devfspath = di_devfs_path(node);
	if (devfspath == NULL) {
		devfsadm_errprint("%s: di_devfs_path() failed\n", modname);
		return (DEVFSADM_CONTINUE);
	}

	if ((mn = di_minor_name(minor)) == NULL) {
		devfsadm_errprint("%s: NULL minor name\n\t%s\n",
		    modname, devfspath);
		di_devfs_path_free(devfspath);
		return (DEVFSADM_CONTINUE);
	}

	/*
	 * verify this is a dialout port
	 */
	if (!is_dialout(mn)) {
		devfsadm_errprint("%s: not a dialout device\n\t%s:%s\n",
		    modname, devfspath, mn);
		di_devfs_path_free(devfspath);
		return (DEVFSADM_CONTINUE);
	}

	(void) strcpy(p_path, devfspath);
	(void) strcat(p_path, ":");
	(void) strcat(p_path, mn);
	di_devfs_path_free(devfspath);

	buf = NULL;

#ifdef __i386
	buf = check_compat_ports(p_path, mn);
#endif

	/*
	 * devfsadm_enumerate_char_start() is a private interface
	 * for use by the ports module only.
	 */
	if (!buf && devfsadm_enumerate_char_start(p_path, 0, &buf, obport_rules,
	    1, start_id)) {
		devfsadm_errprint("%s: devfsadm_enumerate_char_start() failed"
		    "\n\t%s\n", modname, p_path);
		return (DEVFSADM_CONTINUE);
	}

	/*
	 * create the logical link
	 */
	(void) strcpy(l_path, "cua/");
	(void) strcat(l_path, buf);
	(void) devfsadm_mklink(l_path, node, minor, 0);
	free(buf);
	return (DEVFSADM_CONTINUE);
}

static int
ses_callback(di_minor_t minor, di_node_t node)
{
	char l_path[PATH_MAX];
	char *buf;
	char *devfspath;
	char p_path[PATH_MAX];
	devfsadm_enumerate_t re[] = {"^es$/^ses([0-9]+)$", 1, MATCH_ALL};

	/* find devices path -- need to free mem */
	if (NULL == (devfspath = di_devfs_path(node))) {
		return (DEVFSADM_CONTINUE);
	}

	(void) snprintf(p_path, sizeof (p_path), "%s:%s", devfspath,
	    di_minor_name(minor));


	/* find next number to use; buf is an ascii number */
	if (devfsadm_enumerate_int(p_path, 0, &buf, re, 1)) {
		/* free memory */
		di_devfs_path_free(devfspath);
		return (DEVFSADM_CONTINUE);
	}

	(void) snprintf(l_path, sizeof (l_path), "es/ses%s", buf);

	(void) devfsadm_mklink(l_path, node, minor, 0);
	/* free memory */
	free(buf);
	di_devfs_path_free(devfspath);
	return (DEVFSADM_CONTINUE);

}

/*
 * Handles minor node type "ddi_parallel".
 * type=ddi_parallel;name=mcpp     mcpp\N0
 */
static int
parallel(di_minor_t minor, di_node_t node)
{
	char path[PATH_MAX + 1], *buf;
	devfsadm_enumerate_t rules[1] = {"mcpp([0-9]+)$", 1, MATCH_ALL};


	if (strcmp(di_node_name(node), "mcpp") != 0) {
		return (DEVFSADM_CONTINUE);
	}

	if (NULL == (buf = di_devfs_path(node))) {
		return (DEVFSADM_CONTINUE);
	}

	(void) snprintf(path, sizeof (path), "%s:%s",
	    buf, di_minor_name(minor));

	di_devfs_path_free(buf);

	if (devfsadm_enumerate_int(path, 0, &buf, rules, 1)) {
		return (DEVFSADM_CONTINUE);
	}
	(void) snprintf(path, sizeof (path), "mcpp%s", buf);
	free(buf);

	(void) devfsadm_mklink(path, node, minor, 0);
	return (DEVFSADM_CONTINUE);
}

static int
fc_port(di_minor_t minor, di_node_t node)
{
	devfsadm_enumerate_t rules[1] = {"fc/fp([0-9]+)$", 1, MATCH_ALL};
	char *buf, path[PATH_MAX + 1];
	char *ptr;

	if (NULL == (ptr = di_devfs_path(node))) {
		return (DEVFSADM_CONTINUE);
	}

	(void) strcpy(path, ptr);
	(void) strcat(path, ":");
	(void) strcat(path, di_minor_name(minor));

	di_devfs_path_free(ptr);

	if (devfsadm_enumerate_int(path, 0, &buf, rules, 1) != 0) {
		return (DEVFSADM_CONTINUE);
	}

	(void) strcpy(path, "fc/fp");
	(void) strcat(path, buf);
	free(buf);

	(void) devfsadm_mklink(path, node, minor, 0);
	return (DEVFSADM_CONTINUE);
}

/*
 * Handles:
 *	minor node type "ddi_printer".
 * 	rules of the form: type=ddi_printer;name=bpp  \M0
 */
static int
printer_create(di_minor_t minor, di_node_t node)
{
	char *mn;
	char path[PATH_MAX + 1], *buf;
	devfsadm_enumerate_t rules[1] = {"^printers$/^([0-9]+)$", 1, MATCH_ALL};

	mn = di_minor_name(minor);

	if (strcmp(di_driver_name(node), "bpp") == 0) {
		(void) devfsadm_mklink(mn, node, minor, 0);
	}

	if (NULL == (buf = di_devfs_path(node))) {
		return (DEVFSADM_CONTINUE);
	}

	(void) snprintf(path, sizeof (path), "%s:%s", buf, mn);
	di_devfs_path_free(buf);

	if (devfsadm_enumerate_int(path, 0, &buf, rules, 1)) {
		return (DEVFSADM_CONTINUE);
	}

	(void) snprintf(path, sizeof (path), "printers/%s", buf);
	free(buf);

	(void) devfsadm_mklink(path, node, minor, 0);

	return (DEVFSADM_CONTINUE);
}

/*
 * Converts a libdevinfo node into a /devices path.  Caller must free results.
 */
static char *
get_rsrcname(di_node_t dinode)
{
	int len;
	char *rsrcname;
	char *devfspath;
	char name[MAXPATHLEN];

	if ((devfspath = di_devfs_path(dinode)) == NULL) {
		rcm_log_message(RCM_ERROR, "MPXIO: resource has null path.\n");
		return (NULL);
	}

	len = snprintf(name, sizeof (name), "/devices%s", devfspath);
	di_devfs_path_free(devfspath);
	if (len >= sizeof (name)) {
		rcm_log_message(RCM_ERROR, "MPXIO: resource path too long.\n");
		return (NULL);
	}

	if ((rsrcname = strdup(name)) == NULL)
		rcm_log_message(RCM_ERROR,
		    "MPXIO: failed to allocate resource name (%s).\n",
		    strerror(errno));

	return (rsrcname);
}

static int
mc_node(di_minor_t minor, di_node_t node)
{
	char path[PATH_MAX], l_path[PATH_MAX], *buf, *devfspath;
	char *minor_nm;

	minor_nm = di_minor_name(minor);

	if (minor_nm == NULL) {
		return (DEVFSADM_CONTINUE);
	}

	devfspath = di_devfs_path(node);

	(void) strcpy(path, devfspath);
	(void) strcat(path, ":");
	(void) strcat(path, minor_nm);
	di_devfs_path_free(devfspath);

	/* build the physical path from the components */
	if (devfsadm_enumerate_int(path, 0, &buf, mc_rules, 1)) {
		return (DEVFSADM_CONTINUE);
	}

	(void) strcpy(l_path, "mc/mc");
	(void) strcat(l_path, buf);

	free(buf);

	(void) devfsadm_mklink(l_path, node, minor, 0);
	return (DEVFSADM_CONTINUE);
}

/*
 * PCMCIA dialout serial ports
 * Creates links of the form "/dev/cua/pcN", where N is the PCMCIA
 * socket number the device is plugged into.
 */
static int
pcmcia_dialout_create(di_minor_t minor, di_node_t node)
{
	char l_path[MAXPATHLEN];
	char  *devfspath;
	int socket, *intp;

	devfspath = di_devfs_path(node);
	if (devfspath == NULL) {
		devfsadm_errprint("%s: di_devfs_path() failed\n", modname);
		return (DEVFSADM_TERMINATE);
	}

	if (di_prop_lookup_ints(DDI_DEV_T_ANY, node, "socket", &intp) <= 0) {
		devfsadm_errprint("%s: failed socket lookup\n\t%s\n",
		    modname, devfspath);
		di_devfs_path_free(devfspath);
		return (DEVFSADM_TERMINATE);
	}

	socket = PCMCIA_SOCKETNO(*intp);

	di_devfs_path_free(devfspath);
	(void) sprintf(l_path, "cua/pc%d", socket);
	(void) devfsadm_mklink(l_path, node, minor, 0);

	return (DEVFSADM_TERMINATE);
}

/*
 * Lights Out Management (LOM) serial ports
 * Creates links of the form "/dev/term/lom-console".
 */
static int
lom_port_create(di_minor_t minor, di_node_t node)
{
	char  *devfspath;
	char  *minor_name;

	devfspath = di_devfs_path(node);
	if (devfspath == NULL) {
		devfsadm_errprint("%s: di_devfs_path() failed\n", modname);
		return (DEVFSADM_CONTINUE);
	}

	if ((minor_name = di_minor_name(minor)) == NULL) {
		devfsadm_errprint("%s: NULL minor name\n\t%s\n",
		    modname, devfspath);
		di_devfs_path_free(devfspath);
		return (DEVFSADM_CONTINUE);
	}

	/*
	 * if this is the LOM console serial port (i.e. the minor
	 * name == lom-console ), create /dev/term/lom-console link and
	 * then we are done with this node.
	 */
	if (strcmp(minor_name, "lom-console") == 0) {
		(void) devfsadm_mklink("term/lom-console", node, minor, 0);
		di_devfs_path_free(devfspath);
		return (DEVFSADM_TERMINATE);
	}

	/* This is not a LOM node, continue... */
	di_devfs_path_free(devfspath);
	return (DEVFSADM_CONTINUE);
}

static int
gpio(di_minor_t minor, di_node_t node)
{
	char l_path[PATH_MAX], p_path[PATH_MAX], *buf, *devfspath;
	char *minor_nm, *drvr_nm;


	minor_nm = di_minor_name(minor);
	drvr_nm = di_driver_name(node);
	if ((minor_nm == NULL) || (drvr_nm == NULL)) {
		return (DEVFSADM_CONTINUE);
	}

	devfspath = di_devfs_path(node);

	(void) strcpy(p_path, devfspath);
	(void) strcat(p_path, ":");
	(void) strcat(p_path, minor_nm);
	di_devfs_path_free(devfspath);

	/* build the physical path from the components */
	if (devfsadm_enumerate_int(p_path, 0, &buf, gpio_rules, 1)) {
		return (DEVFSADM_CONTINUE);
	}

	(void) snprintf(l_path, sizeof (l_path), "%s%s", "gpio", buf);

	free(buf);

	(void) devfsadm_mklink(l_path, node, minor, 0);

	return (DEVFSADM_CONTINUE);
}

/*
 * Discover an HBA node with  matching path.
 * The di_node_t argument should be the root of the device tree.
 * This routine assumes the locks have been taken
 */
static int
find_matching_hba(di_node_t node, void *arg)
{
	int *propData, rval;
	walkarg_t *wa = (walkarg_t *)arg;
	char	*devpath, fulldevpath[MAXPATHLEN];

	/* Skip stub(instance -1) nodes */
	if (IS_STUB_NODE(node)) {
		return (DI_WALK_CONTINUE);
	}

	rval = di_prop_lookup_ints(DDI_DEV_T_ANY, node,
	    "sm-hba-supported", &propData);
	if (rval < 0) {
		return (DI_WALK_CONTINUE);
	} else {
		if ((devpath = di_devfs_path(node)) == NULL) {
			/* still continue to see if there is matching one. */
			return (DI_WALK_CONTINUE);
		}
		(void) snprintf(fulldevpath, MAXPATHLEN, "%s%s", DEVICES_DIR,
		    devpath);

		if ((strstr(fulldevpath, wa->devpath)) != NULL) {
				*wa->flag = B_TRUE;
			/* Found a node. No need to walk any more. */
			di_devfs_path_free(devpath);
			return (DI_WALK_TERMINATE);
		}
		di_devfs_path_free(devpath);
	}

	return (DI_WALK_CONTINUE);
}