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/*
*
* 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 (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright 2013 Nexenta Systems, Inc. All rights reserved.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include <alloca.h>
#include <limits.h>
#include <fm/topo_mod.h>
#include <sys/param.h>
#include <sys/systeminfo.h>
#include <sys/fm/protocol.h>
#include <sys/stat.h>
#include <topo_method.h>
#include <topo_subr.h>
#include <libzfs.h>
#include <zfs.h>
#include <pthread.h>
static int zfs_enum(topo_mod_t *, tnode_t *, const char *, topo_instance_t,
topo_instance_t, void *, void *);
static void zfs_rele(topo_mod_t *, tnode_t *);
static int zfs_fmri_nvl2str(topo_mod_t *, tnode_t *, topo_version_t,
nvlist_t *, nvlist_t **);
const topo_method_t zfs_methods[] = {
{ TOPO_METH_NVL2STR, TOPO_METH_NVL2STR_DESC, TOPO_METH_NVL2STR_VERSION,
TOPO_STABILITY_INTERNAL, zfs_fmri_nvl2str },
{ NULL }
};
static const topo_modops_t zfs_ops =
{ zfs_enum, zfs_rele };
static const topo_modinfo_t zfs_info =
{ ZFS, FM_FMRI_SCHEME_ZFS, ZFS_VERSION, &zfs_ops };
static libzfs_handle_t *g_zfs = NULL;
static pthread_mutex_t g_lock = PTHREAD_MUTEX_INITIALIZER;
static int g_refcount = 0;
int
zfs_init(topo_mod_t *mod, topo_version_t version)
{
/*
* Turn on module debugging output
*/
if (getenv("TOPOZFSDEBUG"))
topo_mod_setdebug(mod);
topo_mod_dprintf(mod, "initializing zfs builtin\n");
if (version != ZFS_VERSION)
return (topo_mod_seterrno(mod, EMOD_VER_NEW));
if (topo_mod_register(mod, &zfs_info, TOPO_VERSION) != 0) {
topo_mod_dprintf(mod, "failed to register zfs: "
"%s\n", topo_mod_errmsg(mod));
return (-1); /* mod errno already set */
}
(void) pthread_mutex_lock(&g_lock);
if (g_refcount == 0) {
if ((g_zfs = libzfs_init()) == NULL) {
(void) pthread_mutex_unlock(&g_lock);
topo_mod_dprintf(mod, "libzfs_init() failed");
topo_mod_unregister(mod);
return (topo_mod_seterrno(mod, EMOD_UNKNOWN));
}
}
g_refcount++;
(void) pthread_mutex_unlock(&g_lock);
return (0);
}
void
zfs_fini(topo_mod_t *mod)
{
(void) pthread_mutex_lock(&g_lock);
g_refcount--;
if (g_refcount == 0) {
libzfs_fini(g_zfs);
g_zfs = NULL;
}
(void) pthread_mutex_unlock(&g_lock);
topo_mod_unregister(mod);
}
/*ARGSUSED*/
int
zfs_enum(topo_mod_t *mod, tnode_t *pnode, const char *name, topo_instance_t min,
topo_instance_t max, void *notused1, void *notused2)
{
/*
* Methods are registered, but there is no enumeration. Should
* enumeration be added be sure to cater for global vs non-global
* zones.
*/
(void) topo_method_register(mod, pnode, zfs_methods);
return (0);
}
/*ARGSUSED*/
static void
zfs_rele(topo_mod_t *mp, tnode_t *node)
{
topo_method_unregister_all(mp, node);
}
typedef struct cbdata {
uint64_t cb_guid;
zpool_handle_t *cb_pool;
} cbdata_t;
static int
find_pool(zpool_handle_t *zhp, void *data)
{
cbdata_t *cbp = data;
if (zpool_get_prop_int(zhp, ZPOOL_PROP_GUID, NULL) == cbp->cb_guid) {
cbp->cb_pool = zhp;
return (1);
}
zpool_close(zhp);
return (0);
}
static ssize_t
fmri_nvl2str(nvlist_t *nvl, char *buf, size_t buflen)
{
uint64_t pool_guid, vdev_guid;
cbdata_t cb;
ssize_t len;
const char *name;
char guidbuf[64];
(void) nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_POOL, &pool_guid);
/*
* Attempt to convert the pool guid to a name.
*/
cb.cb_guid = pool_guid;
cb.cb_pool = NULL;
if (zpool_iter(g_zfs, find_pool, &cb) == 1) {
name = zpool_get_name(cb.cb_pool);
} else {
(void) snprintf(guidbuf, sizeof (guidbuf), "%llx", pool_guid);
name = guidbuf;
}
if (nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_VDEV, &vdev_guid) == 0)
len = snprintf(buf, buflen, "%s://pool=%s/vdev=%llx",
FM_FMRI_SCHEME_ZFS, name, vdev_guid);
else
len = snprintf(buf, buflen, "%s://pool=%s",
FM_FMRI_SCHEME_ZFS, name);
if (cb.cb_pool)
zpool_close(cb.cb_pool);
return (len);
}
/*ARGSUSED*/
static int
zfs_fmri_nvl2str(topo_mod_t *mod, tnode_t *node, topo_version_t version,
nvlist_t *nvl, nvlist_t **out)
{
ssize_t len;
char *name = NULL;
nvlist_t *fmristr;
if (version > TOPO_METH_NVL2STR_VERSION)
return (topo_mod_seterrno(mod, EMOD_VER_NEW));
if ((len = fmri_nvl2str(nvl, NULL, 0)) == 0 ||
(name = topo_mod_alloc(mod, len + 1)) == NULL ||
fmri_nvl2str(nvl, name, len + 1) == 0) {
if (name != NULL)
topo_mod_free(mod, name, len + 1);
return (topo_mod_seterrno(mod, EMOD_FMRI_NVL));
}
if (topo_mod_nvalloc(mod, &fmristr, NV_UNIQUE_NAME) != 0) {
topo_mod_free(mod, name, len + 1);
return (topo_mod_seterrno(mod, EMOD_FMRI_NVL));
}
if (nvlist_add_string(fmristr, "fmri-string", name) != 0) {
topo_mod_free(mod, name, len + 1);
nvlist_free(fmristr);
return (topo_mod_seterrno(mod, EMOD_FMRI_NVL));
}
topo_mod_free(mod, name, len + 1);
*out = fmristr;
return (0);
}
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