2N/A/*
2N/A *
2N/A * CDDL HEADER START
2N/A *
2N/A * The contents of this file are subject to the terms of the
2N/A * Common Development and Distribution License (the "License").
2N/A * You may not use this file except in compliance with the License.
2N/A *
2N/A * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
2N/A * or http://www.opensolaris.org/os/licensing.
2N/A * See the License for the specific language governing permissions
2N/A * and limitations under the License.
2N/A *
2N/A * When distributing Covered Code, include this CDDL HEADER in each
2N/A * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
2N/A * If applicable, add the following below this CDDL HEADER, with the
2N/A * fields enclosed by brackets "[]" replaced with your own identifying
2N/A * information: Portions Copyright [yyyy] [name of copyright owner]
2N/A *
2N/A * CDDL HEADER END
2N/A */
2N/A
2N/A/*
2N/A * Copyright (c) 2008, 2012, Oracle and/or its affiliates. All rights reserved.
2N/A */
2N/A
2N/A#include <stdio.h>
2N/A#include <stdlib.h>
2N/A#include <string.h>
2N/A#include <errno.h>
2N/A#include <ctype.h>
2N/A#include <alloca.h>
2N/A#include <limits.h>
2N/A#include <fm/topo_mod.h>
2N/A#include <fm/fmd_fmri.h>
2N/A#include <fm/fmd_zfs.h>
2N/A#include <sys/param.h>
2N/A#include <sys/systeminfo.h>
2N/A#include <sys/fm/protocol.h>
2N/A#include <sys/stat.h>
2N/A
2N/A#include <topo_method.h>
2N/A#include <topo_subr.h>
2N/A#include <topo_fmri.h>
2N/A#include <libzfs.h>
2N/A#include <zfs.h>
2N/A
2N/Astatic int zfs_enum(topo_mod_t *, tnode_t *, const char *, topo_instance_t,
2N/A topo_instance_t, void *, void *);
2N/Astatic void zfs_rele(topo_mod_t *, tnode_t *);
2N/Astatic int zfs_fmri_nvl2str(topo_mod_t *, tnode_t *, topo_version_t,
2N/A nvlist_t *, nvlist_t **);
2N/Astatic int zfs_fmri_presence_state(topo_mod_t *, tnode_t *, topo_version_t,
2N/A nvlist_t *, nvlist_t **);
2N/Astatic int zfs_fmri_service_state(topo_mod_t *, tnode_t *, topo_version_t,
2N/A nvlist_t *, nvlist_t **);
2N/Astatic int zfs_fmri_strcmp_ident(topo_mod_t *, tnode_t *, topo_version_t,
2N/A nvlist_t *, nvlist_t **);
2N/Astatic int zfs_fmri_strcmp_path(topo_mod_t *, tnode_t *, topo_version_t,
2N/A nvlist_t *, nvlist_t **);
2N/Astatic int zfs_fmri_strhash_path(topo_mod_t *, tnode_t *, topo_version_t,
2N/A nvlist_t *, nvlist_t **);
2N/A
2N/Aconst topo_method_t zfs_methods[] = {
2N/A { TOPO_METH_NVL2STR, TOPO_METH_NVL2STR_DESC, TOPO_METH_NVL2STR_VERSION,
2N/A TOPO_STABILITY_INTERNAL, zfs_fmri_nvl2str },
2N/A { TOPO_METH_PRESENCE_STATE, TOPO_METH_PRESENCE_STATE_DESC,
2N/A TOPO_METH_PRESENCE_STATE_VERSION, TOPO_STABILITY_INTERNAL,
2N/A zfs_fmri_presence_state },
2N/A { TOPO_METH_SERVICE_STATE, TOPO_METH_SERVICE_STATE_DESC,
2N/A TOPO_METH_SERVICE_STATE_VERSION, TOPO_STABILITY_INTERNAL,
2N/A zfs_fmri_service_state },
2N/A { TOPO_METH_STRCMP_IDENT, TOPO_METH_STRCMP_IDENT_DESC,
2N/A TOPO_METH_STRCMP_VERSION, TOPO_STABILITY_INTERNAL,
2N/A zfs_fmri_strcmp_ident },
2N/A { TOPO_METH_STRCMP_PATH, TOPO_METH_STRCMP_PATH_DESC,
2N/A TOPO_METH_STRCMP_VERSION, TOPO_STABILITY_INTERNAL,
2N/A zfs_fmri_strcmp_path },
2N/A { TOPO_METH_STRHASH_PATH, TOPO_METH_STRHASH_PATH_DESC,
2N/A TOPO_METH_STRHASH_VERSION, TOPO_STABILITY_INTERNAL,
2N/A zfs_fmri_strhash_path },
2N/A { NULL }
2N/A};
2N/A
2N/Astatic const topo_modops_t zfs_ops =
2N/A { zfs_enum, zfs_rele };
2N/Astatic const topo_modinfo_t zfs_info =
2N/A { ZFS, FM_FMRI_SCHEME_ZFS, ZFS_VERSION, &zfs_ops };
2N/A
2N/Atypedef struct zfs_topo_hdl {
2N/A libzfs_handle_t *zt_hdlp;
2N/A pthread_mutex_t zt_mutex;
2N/A} zfs_topo_hdl_t;
2N/A
2N/Aint
2N/Azfs_init(topo_mod_t *mod, topo_version_t version)
2N/A{
2N/A zfs_topo_hdl_t *ztp;
2N/A
2N/A /*
2N/A * Turn on module debugging output
2N/A */
2N/A if (getenv("TOPOZFSDEBUG"))
2N/A topo_mod_setdebug(mod);
2N/A
2N/A topo_mod_dprintf(mod, "initializing zfs builtin\n");
2N/A
2N/A if (version != ZFS_VERSION)
2N/A return (topo_mod_seterrno(mod, EMOD_VER_NEW));
2N/A
2N/A if (topo_mod_register(mod, &zfs_info, TOPO_VERSION) != 0) {
2N/A topo_mod_dprintf(mod, "failed to register zfs: "
2N/A "%s\n", topo_mod_errmsg(mod));
2N/A return (-1); /* mod errno already set */
2N/A }
2N/A
2N/A ztp = topo_mod_zalloc(mod, sizeof (zfs_topo_hdl_t));
2N/A if (ztp == NULL) {
2N/A topo_mod_unregister(mod);
2N/A return (-1);
2N/A }
2N/A ztp->zt_hdlp = libzfs_init();
2N/A (void) pthread_mutex_init(&ztp->zt_mutex, NULL);
2N/A topo_mod_setspecific(mod, (void *)ztp);
2N/A return (0);
2N/A}
2N/A
2N/Avoid
2N/Azfs_fini(topo_mod_t *mod)
2N/A{
2N/A zfs_topo_hdl_t *ztp = (zfs_topo_hdl_t *)topo_mod_getspecific(mod);
2N/A libzfs_handle_t *hdlp = ztp->zt_hdlp;
2N/A
2N/A topo_mod_free(mod, ztp, sizeof (zfs_topo_hdl_t));
2N/A if (hdlp)
2N/A libzfs_fini(hdlp);
2N/A topo_mod_unregister(mod);
2N/A}
2N/A
2N/A
2N/A/*ARGSUSED*/
2N/Aint
2N/Azfs_enum(topo_mod_t *mod, tnode_t *pnode, const char *name, topo_instance_t min,
2N/A topo_instance_t max, void *notused1, void *notused2)
2N/A{
2N/A /*
2N/A * Methods are registered, but there is no enumeration. Should
2N/A * enumeration be added be sure to cater for global vs non-global
2N/A * zones.
2N/A */
2N/A (void) topo_method_register(mod, pnode, zfs_methods);
2N/A return (0);
2N/A}
2N/A
2N/A/*ARGSUSED*/
2N/Astatic void
2N/Azfs_rele(topo_mod_t *mp, tnode_t *node)
2N/A{
2N/A topo_method_unregister_all(mp, node);
2N/A}
2N/A
2N/Astatic ssize_t
2N/Afmri_nvl2str(nvlist_t *nvl, char *buf, size_t buflen)
2N/A{
2N/A uint64_t pool_guid, vdev_guid;
2N/A ssize_t len;
2N/A char *pool_name, *vdev_name;
2N/A
2N/A (void) nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_POOL, &pool_guid);
2N/A if (nvlist_lookup_string(nvl, FM_FMRI_ZFS_POOL_NAME, &pool_name) == 0) {
2N/A if (nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_VDEV,
2N/A &vdev_guid) == 0) {
2N/A if (nvlist_lookup_string(nvl, FM_FMRI_ZFS_VDEV_NAME,
2N/A &vdev_name) == 0) {
2N/A len = snprintf(buf, buflen,
2N/A "%s://pool=%llx/vdev=%llx/pool_name=%s"
2N/A "/vdev_name=%s", FM_FMRI_SCHEME_ZFS,
2N/A pool_guid, vdev_guid, pool_name, vdev_name);
2N/A } else {
2N/A len = snprintf(buf, buflen,
2N/A "%s://pool=%llx/vdev=%llx/pool_name=%s",
2N/A FM_FMRI_SCHEME_ZFS, pool_guid, vdev_guid,
2N/A pool_name);
2N/A }
2N/A } else {
2N/A len = snprintf(buf, buflen,
2N/A "%s://pool=%llx/pool_name=%s",
2N/A FM_FMRI_SCHEME_ZFS, pool_guid, pool_name);
2N/A }
2N/A } else {
2N/A if (nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_VDEV,
2N/A &vdev_guid) == 0)
2N/A len = snprintf(buf, buflen, "%s://pool=%llx/vdev=%llx",
2N/A FM_FMRI_SCHEME_ZFS, pool_guid, vdev_guid);
2N/A else
2N/A len = snprintf(buf, buflen, "%s://pool=%llx",
2N/A FM_FMRI_SCHEME_ZFS, pool_guid);
2N/A }
2N/A return (len);
2N/A}
2N/A
2N/A/*ARGSUSED*/
2N/Astatic int
2N/Azfs_fmri_nvl2str(topo_mod_t *mod, tnode_t *node, topo_version_t version,
2N/A nvlist_t *nvl, nvlist_t **out)
2N/A{
2N/A ssize_t len;
2N/A char *name = NULL;
2N/A nvlist_t *fmristr;
2N/A uint8_t fmversion;
2N/A
2N/A if (version > TOPO_METH_NVL2STR_VERSION)
2N/A return (topo_mod_seterrno(mod, EMOD_VER_NEW));
2N/A
2N/A if (nvlist_lookup_uint8(nvl, FM_VERSION, &fmversion) != 0 ||
2N/A fmversion > FM_ZFS_SCHEME_VERSION)
2N/A return (topo_mod_seterrno(mod, EMOD_FMRI_MALFORM));
2N/A
2N/A if ((len = fmri_nvl2str(nvl, NULL, 0)) == 0 ||
2N/A (name = topo_mod_alloc(mod, len + 1)) == NULL ||
2N/A fmri_nvl2str(nvl, name, len + 1) == 0) {
2N/A if (name != NULL)
2N/A topo_mod_free(mod, name, len + 1);
2N/A return (topo_mod_seterrno(mod, EMOD_FMRI_NVL));
2N/A }
2N/A
2N/A if (topo_mod_nvalloc(mod, &fmristr, NV_UNIQUE_NAME) != 0) {
2N/A topo_mod_free(mod, name, len + 1);
2N/A return (topo_mod_seterrno(mod, EMOD_FMRI_NVL));
2N/A }
2N/A if (nvlist_add_string(fmristr, "fmri-string", name) != 0) {
2N/A topo_mod_free(mod, name, len + 1);
2N/A nvlist_free(fmristr);
2N/A return (topo_mod_seterrno(mod, EMOD_FMRI_NVL));
2N/A }
2N/A topo_mod_free(mod, name, len + 1);
2N/A *out = fmristr;
2N/A
2N/A return (0);
2N/A}
2N/A
2N/Astatic int
2N/Azfs_get_presence(topo_mod_t *mod, nvlist_t *fmri)
2N/A{
2N/A uint64_t pool_guid = 0ll, vdev_guid = 0ll;
2N/A zfs_topo_hdl_t *ztp = (zfs_topo_hdl_t *)topo_mod_getspecific(mod);
2N/A libzfs_handle_t *hdlp = ztp->zt_hdlp;
2N/A int present = 0;
2N/A
2N/A if (hdlp == NULL)
2N/A return (FMD_OBJ_STATE_NOT_PRESENT);
2N/A (void) nvlist_lookup_uint64(fmri, FM_FMRI_ZFS_POOL, &pool_guid);
2N/A (void) nvlist_lookup_uint64(fmri, FM_FMRI_ZFS_VDEV, &vdev_guid);
2N/A (void) pthread_mutex_lock(&ztp->zt_mutex);
2N/A fmd_zfs_iter_by_guid(hdlp, pool_guid, vdev_guid, fmd_zfs_in_config,
2N/A &present);
2N/A (void) pthread_mutex_unlock(&ztp->zt_mutex);
2N/A return (present ? FMD_OBJ_STATE_STILL_PRESENT :
2N/A FMD_OBJ_STATE_NOT_PRESENT);
2N/A}
2N/A
2N/A/*ARGSUSED*/
2N/Astatic int
2N/Azfs_fmri_presence_state(topo_mod_t *mod, tnode_t *node, topo_version_t version,
2N/A nvlist_t *in, nvlist_t **out)
2N/A{
2N/A int state;
2N/A uint8_t fmversion;
2N/A
2N/A if (nvlist_lookup_uint8(in, FM_VERSION, &fmversion) != 0 ||
2N/A fmversion > FM_ZFS_SCHEME_VERSION)
2N/A return (topo_mod_seterrno(mod, EMOD_FMRI_MALFORM));
2N/A
2N/A if (version > TOPO_METH_PRESENCE_STATE_VERSION)
2N/A return (topo_mod_seterrno(mod, EMOD_VER_NEW));
2N/A
2N/A state = zfs_get_presence(mod, in);
2N/A
2N/A if (topo_mod_nvalloc(mod, out, NV_UNIQUE_NAME) != 0)
2N/A return (topo_mod_seterrno(mod, EMOD_NVL_INVAL));
2N/A if (nvlist_add_uint32(*out, TOPO_METH_PRESENCE_STATE_RET, state) != 0) {
2N/A nvlist_free(*out);
2N/A return (topo_mod_seterrno(mod, EMOD_NVL_INVAL));
2N/A }
2N/A return (0);
2N/A}
2N/A
2N/Astatic void
2N/Azfs_get_state(topo_mod_t *mod, nvlist_t *fmri, int *ret)
2N/A{
2N/A uint64_t pool_guid = 0ll, vdev_guid = 0ll;
2N/A zfs_topo_hdl_t *ztp = (zfs_topo_hdl_t *)topo_mod_getspecific(mod);
2N/A libzfs_handle_t *hdlp = ztp->zt_hdlp;
2N/A int zfs_state = VDEV_STATE_HEALTHY;
2N/A
2N/A if (hdlp == NULL) {
2N/A *ret = FMD_SERVICE_STATE_OK;
2N/A return;
2N/A }
2N/A (void) nvlist_lookup_uint64(fmri, FM_FMRI_ZFS_POOL, &pool_guid);
2N/A (void) nvlist_lookup_uint64(fmri, FM_FMRI_ZFS_VDEV, &vdev_guid);
2N/A (void) pthread_mutex_lock(&ztp->zt_mutex);
2N/A fmd_zfs_iter_by_guid(hdlp, pool_guid, vdev_guid, fmd_zfs_vdev_state,
2N/A &zfs_state);
2N/A (void) pthread_mutex_unlock(&ztp->zt_mutex);
2N/A if (zfs_state <= VDEV_STATE_UNUSABLE)
2N/A *ret = FMD_SERVICE_STATE_UNUSABLE;
2N/A else if (zfs_state == VDEV_STATE_DEGRADED)
2N/A *ret = FMD_SERVICE_STATE_DEGRADED;
2N/A else
2N/A *ret = FMD_SERVICE_STATE_OK;
2N/A}
2N/A
2N/A/*ARGSUSED*/
2N/Astatic int
2N/Azfs_fmri_service_state(topo_mod_t *mod, tnode_t *node, topo_version_t version,
2N/A nvlist_t *in, nvlist_t **out)
2N/A{
2N/A int state;
2N/A uint8_t fmversion;
2N/A
2N/A if (nvlist_lookup_uint8(in, FM_VERSION, &fmversion) != 0 ||
2N/A fmversion > FM_ZFS_SCHEME_VERSION)
2N/A return (topo_mod_seterrno(mod, EMOD_FMRI_MALFORM));
2N/A
2N/A if (version > TOPO_METH_SERVICE_STATE_VERSION)
2N/A return (topo_mod_seterrno(mod, EMOD_VER_NEW));
2N/A
2N/A zfs_get_state(mod, in, &state);
2N/A
2N/A if (topo_mod_nvalloc(mod, out, NV_UNIQUE_NAME) != 0)
2N/A return (topo_mod_seterrno(mod, EMOD_NVL_INVAL));
2N/A if (nvlist_add_uint32(*out, TOPO_METH_SERVICE_STATE_RET, state) != 0) {
2N/A nvlist_free(*out);
2N/A return (topo_mod_seterrno(mod, EMOD_NVL_INVAL));
2N/A }
2N/A
2N/A return (0);
2N/A}
2N/A
2N/A/*ARGSUSED*/
2N/Astatic int
2N/Azfs_fmri_strhash_path(topo_mod_t *mod, tnode_t *node, topo_version_t version,
2N/A nvlist_t *in, nvlist_t **out)
2N/A{
2N/A char *fmri = (char *)in, *f = NULL, *endf;
2N/A uint64_t h = 0;
2N/A uint64_t *rval = (uint64_t *)(void *)out;
2N/A
2N/A if (fmri != NULL) {
2N/A h += topo_fmri_strhash_one(fmri, strlen("zfs://"));
2N/A f = fmri + strlen("zfs://");
2N/A }
2N/A
2N/A /*
2N/A * Hash until we find FM_FMRI_ZFS_POOL_NAME (if present).
2N/A */
2N/A if (f != NULL) {
2N/A endf = strstr(f, "/" FM_FMRI_ZFS_POOL_NAME);
2N/A h += topo_fmri_strhash_one(f, (endf == NULL) ? strlen(f) :
2N/A (endf - f));
2N/A }
2N/A *rval = h;
2N/A return (0);
2N/A}
2N/A
2N/A/*ARGSUSED*/
2N/Astatic int
2N/Azfs_fmri_strcmp_path(topo_mod_t *mod, tnode_t *node, topo_version_t version,
2N/A nvlist_t *in, nvlist_t **out)
2N/A{
2N/A char *a = (char *)in, *b = (char *)out;
2N/A char *enda, *endb;
2N/A int lena, lenb;
2N/A
2N/A /*
2N/A * Compare until we find FM_FMRI_ZFS_POOL_NAME (if present).
2N/A */
2N/A enda = strstr(a, "/" FM_FMRI_ZFS_POOL_NAME);
2N/A lena = (enda == NULL) ? strlen(a) : (enda - a);
2N/A endb = strstr(b, "/" FM_FMRI_ZFS_POOL_NAME);
2N/A lenb = (endb == NULL) ? strlen(b) : (endb - b);
2N/A if (lena != lenb)
2N/A return (B_FALSE);
2N/A if (lena == 0)
2N/A return (B_TRUE);
2N/A else
2N/A return (strncmp(a, b, lena) == 0);
2N/A}
2N/A
2N/A/*ARGSUSED*/
2N/Astatic int
2N/Azfs_fmri_strcmp_ident(topo_mod_t *mod, tnode_t *node, topo_version_t version,
2N/A nvlist_t *in, nvlist_t **out)
2N/A{
2N/A return (B_TRUE);
2N/A}