scheme.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (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 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <fm/fmd_fmri.h>
#include <libdevinfo.h>
#include <alloca.h>
#include <string.h>
/*
* buf_append -- Append str to buf (if it's non-NULL). Place prepend
* in buf in front of str and append behind it (if they're non-NULL).
* Continue to update size even if we run out of space to actually
* stuff characters in the buffer.
*/
static void
buf_append(ssize_t *sz, char *buf, size_t buflen, char *str,
char *prepend, char *append)
{
ssize_t left;
if (str == NULL)
return;
if (buflen == 0 || (left = buflen - *sz) < 0)
left = 0;
if (buf != NULL && left != 0)
buf += *sz;
if (prepend == NULL && append == NULL)
*sz += snprintf(buf, left, "%s", str);
else if (append == NULL)
*sz += snprintf(buf, left, "%s%s", prepend, str);
else if (prepend == NULL)
*sz += snprintf(buf, left, "%s%s", str, append);
else
*sz += snprintf(buf, left, "%s%s%s", prepend, str, append);
}
ssize_t
fmd_fmri_nvl2str(nvlist_t *nvl, char *buf, size_t buflen)
{
nvlist_t *anvl = NULL;
uint8_t version;
ssize_t size = 0;
char *devid = NULL;
char *devpath = NULL;
char *achas = NULL;
char *adom = NULL;
char *aprod = NULL;
char *asrvr = NULL;
char *ahost = NULL;
int more_auth = 0;
int err;
if (nvlist_lookup_uint8(nvl, FM_VERSION, &version) != 0 ||
version > FM_DEV_SCHEME_VERSION)
return (fmd_fmri_set_errno(EINVAL));
/* Get authority, if present */
err = nvlist_lookup_nvlist(nvl, FM_FMRI_AUTHORITY, &anvl);
if (err != 0 && err != ENOENT)
return (fmd_fmri_set_errno(err));
/* Get devid, if present */
err = nvlist_lookup_string(nvl, FM_FMRI_DEV_ID, &devid);
if (err != 0 && err != ENOENT)
return (fmd_fmri_set_errno(err));
/* There must be a device path present */
err = nvlist_lookup_string(nvl, FM_FMRI_DEV_PATH, &devpath);
if (err != 0 || devpath == NULL)
return (fmd_fmri_set_errno(EINVAL));
if (anvl != NULL) {
(void) nvlist_lookup_string(anvl,
FM_FMRI_AUTH_PRODUCT, &aprod);
(void) nvlist_lookup_string(anvl,
FM_FMRI_AUTH_CHASSIS, &achas);
(void) nvlist_lookup_string(anvl,
FM_FMRI_AUTH_DOMAIN, &adom);
(void) nvlist_lookup_string(anvl,
FM_FMRI_AUTH_SERVER, &asrvr);
(void) nvlist_lookup_string(anvl,
FM_FMRI_AUTH_HOST, &ahost);
if (aprod != NULL)
more_auth++;
if (achas != NULL)
more_auth++;
if (adom != NULL)
more_auth++;
if (asrvr != NULL)
more_auth++;
if (ahost != NULL)
more_auth++;
}
/* dev:// */
buf_append(&size, buf, buflen, FM_FMRI_SCHEME_DEV, NULL, "://");
/* authority, if any */
if (aprod != NULL)
buf_append(&size, buf, buflen, aprod, FM_FMRI_AUTH_PRODUCT "=",
--more_auth > 0 ? "," : NULL);
if (achas != NULL)
buf_append(&size, buf, buflen, achas, FM_FMRI_AUTH_CHASSIS "=",
--more_auth > 0 ? "," : NULL);
if (adom != NULL)
buf_append(&size, buf, buflen, adom, FM_FMRI_AUTH_DOMAIN "=",
--more_auth > 0 ? "," : NULL);
if (asrvr != NULL)
buf_append(&size, buf, buflen, asrvr, FM_FMRI_AUTH_SERVER "=",
--more_auth > 0 ? "," : NULL);
if (ahost != NULL)
buf_append(&size, buf, buflen, ahost, FM_FMRI_AUTH_HOST "=",
NULL);
/* device-id part */
buf_append(&size, buf, buflen, devid, "/:" FM_FMRI_DEV_ID "=", NULL);
/* device-path part */
buf_append(&size, buf, buflen, devpath, "/", NULL);
return (size);
}
/*
* callback routine for di_walk_minor()
*/
struct walkinfo {
int matched;
const char *path;
int len;
};
static int
dev_match(di_node_t node, void *arg)
{
struct walkinfo *wip = (struct walkinfo *)arg;
char *path = di_devfs_path(node);
if (path != NULL && strncmp(path, wip->path, wip->len) == 0) {
/*
* found the match we were looking for, set matched
* flag and terminate the walk.
*/
wip->matched = 1;
di_devfs_path_free(path);
return (DI_WALK_TERMINATE);
}
if (path != NULL)
di_devfs_path_free(path);
return (DI_WALK_CONTINUE);
}
/*
* For now we only check for the presence of the device in the device
* tree. This is somewhat unsophisticated, because a device may have
* been inserted into the same slot as the previous ASRU and we don't
* know how to tell them apart yet.
*/
int
fmd_fmri_present(nvlist_t *nvl)
{
di_node_t parent;
uint8_t version;
char *devpath = NULL;
char *parentpath;
char *cp;
struct walkinfo walkinfo;
if (nvlist_lookup_uint8(nvl, FM_VERSION, &version) != 0 ||
version > FM_DEV_SCHEME_VERSION ||
nvlist_lookup_string(nvl, FM_FMRI_DEV_PATH, &devpath) != 0)
return (fmd_fmri_set_errno(EINVAL));
if (devpath == NULL || (walkinfo.len = strlen(devpath)) == 0)
return (fmd_fmri_set_errno(EINVAL));
/* strip off last component of path */
parentpath = alloca(walkinfo.len + 1);
(void) strcpy(parentpath, devpath);
if ((cp = strrchr(parentpath, '/')) == NULL)
parentpath = "/";
else
*cp = '\0';
/* if the result is an empty path, start walk at "/" */
if (*parentpath == '\0')
parentpath = "/";
if ((parent = di_init(parentpath, DINFOSUBTREE)) == DI_NODE_NIL)
return (errno == ENXIO ? 0 : -1);
walkinfo.matched = 0;
walkinfo.path = devpath;
di_walk_node(parent, DI_WALK_SIBFIRST, (void *)&walkinfo, dev_match);
di_fini(parent);
return (walkinfo.matched);
}
/*
* We presently don't have a good indication of the usability of an
* ASRU in the dev scheme, so we'll assume its usable.
*/
int
fmd_fmri_unusable(nvlist_t *nvl)
{
uint8_t version;
if (nvlist_lookup_uint8(nvl, FM_VERSION, &version) != 0 ||
version > FM_DEV_SCHEME_VERSION)
return (fmd_fmri_set_errno(EINVAL));
return (0);
}