--- /dev/null
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2012, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/obdclass/obd_config.c
+ *
+ * Config API
+ */
+
+#define DEBUG_SUBSYSTEM S_CLASS
+#include "../include/obd_class.h"
+#include <linux/string.h>
+#include "../include/lustre_log.h"
+#include "../include/lprocfs_status.h"
+#include "../include/lustre_param.h"
+
+#include "llog_internal.h"
+
+static cfs_hash_ops_t uuid_hash_ops;
+static cfs_hash_ops_t nid_hash_ops;
+static cfs_hash_ops_t nid_stat_hash_ops;
+
+/*********** string parsing utils *********/
+
+/* returns 0 if we find this key in the buffer, else 1 */
+int class_find_param(char *buf, char *key, char **valp)
+{
+ char *ptr;
+
+ if (!buf)
+ return 1;
+
+ ptr = strstr(buf, key);
+ if (ptr == NULL)
+ return 1;
+
+ if (valp)
+ *valp = ptr + strlen(key);
+
+ return 0;
+}
+EXPORT_SYMBOL(class_find_param);
+
+/**
+ * Check whether the proc parameter \a param is an old parameter or not from
+ * the array \a ptr which contains the mapping from old parameters to new ones.
+ * If it's an old one, then return the pointer to the cfg_interop_param struc-
+ * ture which contains both the old and new parameters.
+ *
+ * \param param proc parameter
+ * \param ptr an array which contains the mapping from
+ * old parameters to new ones
+ *
+ * \retval valid-pointer pointer to the cfg_interop_param structure
+ * which contains the old and new parameters
+ * \retval NULL \a param or \a ptr is NULL,
+ * or \a param is not an old parameter
+ */
+struct cfg_interop_param *class_find_old_param(const char *param,
+ struct cfg_interop_param *ptr)
+{
+ char *value = NULL;
+ int name_len = 0;
+
+ if (param == NULL || ptr == NULL)
+ return NULL;
+
+ value = strchr(param, '=');
+ if (value == NULL)
+ name_len = strlen(param);
+ else
+ name_len = value - param;
+
+ while (ptr->old_param != NULL) {
+ if (strncmp(param, ptr->old_param, name_len) == 0 &&
+ name_len == strlen(ptr->old_param))
+ return ptr;
+ ptr++;
+ }
+
+ return NULL;
+}
+EXPORT_SYMBOL(class_find_old_param);
+
+/**
+ * Finds a parameter in \a params and copies it to \a copy.
+ *
+ * Leading spaces are skipped. Next space or end of string is the
+ * parameter terminator with the exception that spaces inside single or double
+ * quotes get included into a parameter. The parameter is copied into \a copy
+ * which has to be allocated big enough by a caller, quotes are stripped in
+ * the copy and the copy is terminated by 0.
+ *
+ * On return \a params is set to next parameter or to NULL if last
+ * parameter is returned.
+ *
+ * \retval 0 if parameter is returned in \a copy
+ * \retval 1 otherwise
+ * \retval -EINVAL if unbalanced quota is found
+ */
+int class_get_next_param(char **params, char *copy)
+{
+ char *q1, *q2, *str;
+ int len;
+
+ str = *params;
+ while (*str == ' ')
+ str++;
+
+ if (*str == '\0') {
+ *params = NULL;
+ return 1;
+ }
+
+ while (1) {
+ q1 = strpbrk(str, " '\"");
+ if (q1 == NULL) {
+ len = strlen(str);
+ memcpy(copy, str, len);
+ copy[len] = '\0';
+ *params = NULL;
+ return 0;
+ }
+ len = q1 - str;
+ if (*q1 == ' ') {
+ memcpy(copy, str, len);
+ copy[len] = '\0';
+ *params = str + len;
+ return 0;
+ }
+
+ memcpy(copy, str, len);
+ copy += len;
+
+ /* search for the matching closing quote */
+ str = q1 + 1;
+ q2 = strchr(str, *q1);
+ if (q2 == NULL) {
+ CERROR("Unbalanced quota in parameters: \"%s\"\n",
+ *params);
+ return -EINVAL;
+ }
+ len = q2 - str;
+ memcpy(copy, str, len);
+ copy += len;
+ str = q2 + 1;
+ }
+ return 1;
+}
+EXPORT_SYMBOL(class_get_next_param);
+
+/* returns 0 if this is the first key in the buffer, else 1.
+ valp points to first char after key. */
+int class_match_param(char *buf, char *key, char **valp)
+{
+ if (!buf)
+ return 1;
+
+ if (memcmp(buf, key, strlen(key)) != 0)
+ return 1;
+
+ if (valp)
+ *valp = buf + strlen(key);
+
+ return 0;
+}
+EXPORT_SYMBOL(class_match_param);
+
+static int parse_nid(char *buf, void *value, int quiet)
+{
+ lnet_nid_t *nid = (lnet_nid_t *)value;
+
+ *nid = libcfs_str2nid(buf);
+ if (*nid != LNET_NID_ANY)
+ return 0;
+
+ if (!quiet)
+ LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", buf);
+ return -EINVAL;
+}
+
+static int parse_net(char *buf, void *value)
+{
+ __u32 *net = (__u32 *)value;
+
+ *net = libcfs_str2net(buf);
+ CDEBUG(D_INFO, "Net %s\n", libcfs_net2str(*net));
+ return 0;
+}
+
+enum {
+ CLASS_PARSE_NID = 1,
+ CLASS_PARSE_NET,
+};
+
+/* 0 is good nid,
+ 1 not found
+ < 0 error
+ endh is set to next separator */
+static int class_parse_value(char *buf, int opc, void *value, char **endh,
+ int quiet)
+{
+ char *endp;
+ char tmp;
+ int rc = 0;
+
+ if (!buf)
+ return 1;
+ while (*buf == ',' || *buf == ':')
+ buf++;
+ if (*buf == ' ' || *buf == '/' || *buf == '\0')
+ return 1;
+
+ /* nid separators or end of nids */
+ endp = strpbrk(buf, ",: /");
+ if (endp == NULL)
+ endp = buf + strlen(buf);
+
+ tmp = *endp;
+ *endp = '\0';
+ switch (opc) {
+ default:
+ LBUG();
+ case CLASS_PARSE_NID:
+ rc = parse_nid(buf, value, quiet);
+ break;
+ case CLASS_PARSE_NET:
+ rc = parse_net(buf, value);
+ break;
+ }
+ *endp = tmp;
+ if (rc != 0)
+ return rc;
+ if (endh)
+ *endh = endp;
+ return 0;
+}
+
+int class_parse_nid(char *buf, lnet_nid_t *nid, char **endh)
+{
+ return class_parse_value(buf, CLASS_PARSE_NID, (void *)nid, endh, 0);
+}
+EXPORT_SYMBOL(class_parse_nid);
+
+int class_parse_nid_quiet(char *buf, lnet_nid_t *nid, char **endh)
+{
+ return class_parse_value(buf, CLASS_PARSE_NID, (void *)nid, endh, 1);
+}
+EXPORT_SYMBOL(class_parse_nid_quiet);
+
+int class_parse_net(char *buf, __u32 *net, char **endh)
+{
+ return class_parse_value(buf, CLASS_PARSE_NET, (void *)net, endh, 0);
+}
+EXPORT_SYMBOL(class_parse_net);
+
+/* 1 param contains key and match
+ * 0 param contains key and not match
+ * -1 param does not contain key
+ */
+int class_match_nid(char *buf, char *key, lnet_nid_t nid)
+{
+ lnet_nid_t tmp;
+ int rc = -1;
+
+ while (class_find_param(buf, key, &buf) == 0) {
+ /* please restrict to the nids pertaining to
+ * the specified nids */
+ while (class_parse_nid(buf, &tmp, &buf) == 0) {
+ if (tmp == nid)
+ return 1;
+ }
+ rc = 0;
+ }
+ return rc;
+}
+EXPORT_SYMBOL(class_match_nid);
+
+int class_match_net(char *buf, char *key, __u32 net)
+{
+ __u32 tmp;
+ int rc = -1;
+
+ while (class_find_param(buf, key, &buf) == 0) {
+ /* please restrict to the nids pertaining to
+ * the specified networks */
+ while (class_parse_net(buf, &tmp, &buf) == 0) {
+ if (tmp == net)
+ return 1;
+ }
+ rc = 0;
+ }
+ return rc;
+}
+EXPORT_SYMBOL(class_match_net);
+
+/********************** class fns **********************/
+
+/**
+ * Create a new obd device and set the type, name and uuid. If successful,
+ * the new device can be accessed by either name or uuid.
+ */
+int class_attach(struct lustre_cfg *lcfg)
+{
+ struct obd_device *obd = NULL;
+ char *typename, *name, *uuid;
+ int rc, len;
+
+ if (!LUSTRE_CFG_BUFLEN(lcfg, 1)) {
+ CERROR("No type passed!\n");
+ return -EINVAL;
+ }
+ typename = lustre_cfg_string(lcfg, 1);
+
+ if (!LUSTRE_CFG_BUFLEN(lcfg, 0)) {
+ CERROR("No name passed!\n");
+ return -EINVAL;
+ }
+ name = lustre_cfg_string(lcfg, 0);
+
+ if (!LUSTRE_CFG_BUFLEN(lcfg, 2)) {
+ CERROR("No UUID passed!\n");
+ return -EINVAL;
+ }
+ uuid = lustre_cfg_string(lcfg, 2);
+
+ CDEBUG(D_IOCTL, "attach type %s name: %s uuid: %s\n",
+ MKSTR(typename), MKSTR(name), MKSTR(uuid));
+
+ obd = class_newdev(typename, name);
+ if (IS_ERR(obd)) {
+ /* Already exists or out of obds */
+ rc = PTR_ERR(obd);
+ obd = NULL;
+ CERROR("Cannot create device %s of type %s : %d\n",
+ name, typename, rc);
+ goto out;
+ }
+ LASSERTF(obd != NULL, "Cannot get obd device %s of type %s\n",
+ name, typename);
+ LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
+ "obd %p obd_magic %08X != %08X\n",
+ obd, obd->obd_magic, OBD_DEVICE_MAGIC);
+ LASSERTF(strncmp(obd->obd_name, name, strlen(name)) == 0,
+ "%p obd_name %s != %s\n", obd, obd->obd_name, name);
+
+ rwlock_init(&obd->obd_pool_lock);
+ obd->obd_pool_limit = 0;
+ obd->obd_pool_slv = 0;
+
+ INIT_LIST_HEAD(&obd->obd_exports);
+ INIT_LIST_HEAD(&obd->obd_unlinked_exports);
+ INIT_LIST_HEAD(&obd->obd_delayed_exports);
+ INIT_LIST_HEAD(&obd->obd_exports_timed);
+ INIT_LIST_HEAD(&obd->obd_nid_stats);
+ spin_lock_init(&obd->obd_nid_lock);
+ spin_lock_init(&obd->obd_dev_lock);
+ mutex_init(&obd->obd_dev_mutex);
+ spin_lock_init(&obd->obd_osfs_lock);
+ /* obd->obd_osfs_age must be set to a value in the distant
+ * past to guarantee a fresh statfs is fetched on mount. */
+ obd->obd_osfs_age = cfs_time_shift_64(-1000);
+
+ /* XXX belongs in setup not attach */
+ init_rwsem(&obd->obd_observer_link_sem);
+ /* recovery data */
+ cfs_init_timer(&obd->obd_recovery_timer);
+ spin_lock_init(&obd->obd_recovery_task_lock);
+ init_waitqueue_head(&obd->obd_next_transno_waitq);
+ init_waitqueue_head(&obd->obd_evict_inprogress_waitq);
+ INIT_LIST_HEAD(&obd->obd_req_replay_queue);
+ INIT_LIST_HEAD(&obd->obd_lock_replay_queue);
+ INIT_LIST_HEAD(&obd->obd_final_req_queue);
+ INIT_LIST_HEAD(&obd->obd_evict_list);
+
+ llog_group_init(&obd->obd_olg, FID_SEQ_LLOG);
+
+ obd->obd_conn_inprogress = 0;
+
+ len = strlen(uuid);
+ if (len >= sizeof(obd->obd_uuid)) {
+ CERROR("uuid must be < %d bytes long\n",
+ (int)sizeof(obd->obd_uuid));
+ rc = -EINVAL;
+ goto out;
+ }
+ memcpy(obd->obd_uuid.uuid, uuid, len);
+
+ /* do the attach */
+ if (OBP(obd, attach)) {
+ rc = OBP(obd, attach)(obd, sizeof(*lcfg), lcfg);
+ if (rc) {
+ rc = -EINVAL;
+ goto out;
+ }
+ }
+
+ /* Detach drops this */
+ spin_lock(&obd->obd_dev_lock);
+ atomic_set(&obd->obd_refcount, 1);
+ spin_unlock(&obd->obd_dev_lock);
+ lu_ref_init(&obd->obd_reference);
+ lu_ref_add(&obd->obd_reference, "attach", obd);
+
+ obd->obd_attached = 1;
+ CDEBUG(D_IOCTL, "OBD: dev %d attached type %s with refcount %d\n",
+ obd->obd_minor, typename, atomic_read(&obd->obd_refcount));
+ return 0;
+ out:
+ if (obd != NULL) {
+ class_release_dev(obd);
+ }
+ return rc;
+}
+EXPORT_SYMBOL(class_attach);
+
+/** Create hashes, self-export, and call type-specific setup.
+ * Setup is effectively the "start this obd" call.
+ */
+int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
+{
+ int err = 0;
+ struct obd_export *exp;
+
+ LASSERT(obd != NULL);
+ LASSERTF(obd == class_num2obd(obd->obd_minor),
+ "obd %p != obd_devs[%d] %p\n",
+ obd, obd->obd_minor, class_num2obd(obd->obd_minor));
+ LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
+ "obd %p obd_magic %08x != %08x\n",
+ obd, obd->obd_magic, OBD_DEVICE_MAGIC);
+
+ /* have we attached a type to this device? */
+ if (!obd->obd_attached) {
+ CERROR("Device %d not attached\n", obd->obd_minor);
+ return -ENODEV;
+ }
+
+ if (obd->obd_set_up) {
+ CERROR("Device %d already setup (type %s)\n",
+ obd->obd_minor, obd->obd_type->typ_name);
+ return -EEXIST;
+ }
+
+ /* is someone else setting us up right now? (attach inits spinlock) */
+ spin_lock(&obd->obd_dev_lock);
+ if (obd->obd_starting) {
+ spin_unlock(&obd->obd_dev_lock);
+ CERROR("Device %d setup in progress (type %s)\n",
+ obd->obd_minor, obd->obd_type->typ_name);
+ return -EEXIST;
+ }
+ /* just leave this on forever. I can't use obd_set_up here because
+ other fns check that status, and we're not actually set up yet. */
+ obd->obd_starting = 1;
+ obd->obd_uuid_hash = NULL;
+ obd->obd_nid_hash = NULL;
+ obd->obd_nid_stats_hash = NULL;
+ spin_unlock(&obd->obd_dev_lock);
+
+ /* create an uuid-export lustre hash */
+ obd->obd_uuid_hash = cfs_hash_create("UUID_HASH",
+ HASH_UUID_CUR_BITS,
+ HASH_UUID_MAX_BITS,
+ HASH_UUID_BKT_BITS, 0,
+ CFS_HASH_MIN_THETA,
+ CFS_HASH_MAX_THETA,
+ &uuid_hash_ops, CFS_HASH_DEFAULT);
+ if (!obd->obd_uuid_hash) {
+ err = -ENOMEM;
+ goto err_hash;
+ }
+
+ /* create a nid-export lustre hash */
+ obd->obd_nid_hash = cfs_hash_create("NID_HASH",
+ HASH_NID_CUR_BITS,
+ HASH_NID_MAX_BITS,
+ HASH_NID_BKT_BITS, 0,
+ CFS_HASH_MIN_THETA,
+ CFS_HASH_MAX_THETA,
+ &nid_hash_ops, CFS_HASH_DEFAULT);
+ if (!obd->obd_nid_hash) {
+ err = -ENOMEM;
+ goto err_hash;
+ }
+
+ /* create a nid-stats lustre hash */
+ obd->obd_nid_stats_hash = cfs_hash_create("NID_STATS",
+ HASH_NID_STATS_CUR_BITS,
+ HASH_NID_STATS_MAX_BITS,
+ HASH_NID_STATS_BKT_BITS, 0,
+ CFS_HASH_MIN_THETA,
+ CFS_HASH_MAX_THETA,
+ &nid_stat_hash_ops, CFS_HASH_DEFAULT);
+ if (!obd->obd_nid_stats_hash) {
+ err = -ENOMEM;
+ goto err_hash;
+ }
+
+ exp = class_new_export(obd, &obd->obd_uuid);
+ if (IS_ERR(exp)) {
+ err = PTR_ERR(exp);
+ goto err_hash;
+ }
+
+ obd->obd_self_export = exp;
+ list_del_init(&exp->exp_obd_chain_timed);
+ class_export_put(exp);
+
+ err = obd_setup(obd, lcfg);
+ if (err)
+ goto err_exp;
+
+ obd->obd_set_up = 1;
+
+ spin_lock(&obd->obd_dev_lock);
+ /* cleanup drops this */
+ class_incref(obd, "setup", obd);
+ spin_unlock(&obd->obd_dev_lock);
+
+ CDEBUG(D_IOCTL, "finished setup of obd %s (uuid %s)\n",
+ obd->obd_name, obd->obd_uuid.uuid);
+
+ return 0;
+err_exp:
+ if (obd->obd_self_export) {
+ class_unlink_export(obd->obd_self_export);
+ obd->obd_self_export = NULL;
+ }
+err_hash:
+ if (obd->obd_uuid_hash) {
+ cfs_hash_putref(obd->obd_uuid_hash);
+ obd->obd_uuid_hash = NULL;
+ }
+ if (obd->obd_nid_hash) {
+ cfs_hash_putref(obd->obd_nid_hash);
+ obd->obd_nid_hash = NULL;
+ }
+ if (obd->obd_nid_stats_hash) {
+ cfs_hash_putref(obd->obd_nid_stats_hash);
+ obd->obd_nid_stats_hash = NULL;
+ }
+ obd->obd_starting = 0;
+ CERROR("setup %s failed (%d)\n", obd->obd_name, err);
+ return err;
+}
+EXPORT_SYMBOL(class_setup);
+
+/** We have finished using this obd and are ready to destroy it.
+ * There can be no more references to this obd.
+ */
+int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg)
+{
+ if (obd->obd_set_up) {
+ CERROR("OBD device %d still set up\n", obd->obd_minor);
+ return -EBUSY;
+ }
+
+ spin_lock(&obd->obd_dev_lock);
+ if (!obd->obd_attached) {
+ spin_unlock(&obd->obd_dev_lock);
+ CERROR("OBD device %d not attached\n", obd->obd_minor);
+ return -ENODEV;
+ }
+ obd->obd_attached = 0;
+ spin_unlock(&obd->obd_dev_lock);
+
+ CDEBUG(D_IOCTL, "detach on obd %s (uuid %s)\n",
+ obd->obd_name, obd->obd_uuid.uuid);
+
+ class_decref(obd, "attach", obd);
+ return 0;
+}
+EXPORT_SYMBOL(class_detach);
+
+/** Start shutting down the obd. There may be in-progress ops when
+ * this is called. We tell them to start shutting down with a call
+ * to class_disconnect_exports().
+ */
+int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg)
+{
+ int err = 0;
+ char *flag;
+
+ OBD_RACE(OBD_FAIL_LDLM_RECOV_CLIENTS);
+
+ if (!obd->obd_set_up) {
+ CERROR("Device %d not setup\n", obd->obd_minor);
+ return -ENODEV;
+ }
+
+ spin_lock(&obd->obd_dev_lock);
+ if (obd->obd_stopping) {
+ spin_unlock(&obd->obd_dev_lock);
+ CERROR("OBD %d already stopping\n", obd->obd_minor);
+ return -ENODEV;
+ }
+ /* Leave this on forever */
+ obd->obd_stopping = 1;
+
+ /* wait for already-arrived-connections to finish. */
+ while (obd->obd_conn_inprogress > 0) {
+ spin_unlock(&obd->obd_dev_lock);
+
+ cond_resched();
+
+ spin_lock(&obd->obd_dev_lock);
+ }
+ spin_unlock(&obd->obd_dev_lock);
+
+ if (lcfg->lcfg_bufcount >= 2 && LUSTRE_CFG_BUFLEN(lcfg, 1) > 0) {
+ for (flag = lustre_cfg_string(lcfg, 1); *flag != 0; flag++)
+ switch (*flag) {
+ case 'F':
+ obd->obd_force = 1;
+ break;
+ case 'A':
+ LCONSOLE_WARN("Failing over %s\n",
+ obd->obd_name);
+ obd->obd_fail = 1;
+ obd->obd_no_transno = 1;
+ obd->obd_no_recov = 1;
+ if (OBP(obd, iocontrol)) {
+ obd_iocontrol(OBD_IOC_SYNC,
+ obd->obd_self_export,
+ 0, NULL, NULL);
+ }
+ break;
+ default:
+ CERROR("Unrecognised flag '%c'\n", *flag);
+ }
+ }
+
+ LASSERT(obd->obd_self_export);
+
+ /* The three references that should be remaining are the
+ * obd_self_export and the attach and setup references. */
+ if (atomic_read(&obd->obd_refcount) > 3) {
+ /* refcount - 3 might be the number of real exports
+ (excluding self export). But class_incref is called
+ by other things as well, so don't count on it. */
+ CDEBUG(D_IOCTL, "%s: forcing exports to disconnect: %d\n",
+ obd->obd_name, atomic_read(&obd->obd_refcount) - 3);
+ dump_exports(obd, 0);
+ class_disconnect_exports(obd);
+ }
+
+ /* Precleanup, we must make sure all exports get destroyed. */
+ err = obd_precleanup(obd, OBD_CLEANUP_EXPORTS);
+ if (err)
+ CERROR("Precleanup %s returned %d\n",
+ obd->obd_name, err);
+
+ /* destroy an uuid-export hash body */
+ if (obd->obd_uuid_hash) {
+ cfs_hash_putref(obd->obd_uuid_hash);
+ obd->obd_uuid_hash = NULL;
+ }
+
+ /* destroy a nid-export hash body */
+ if (obd->obd_nid_hash) {
+ cfs_hash_putref(obd->obd_nid_hash);
+ obd->obd_nid_hash = NULL;
+ }
+
+ /* destroy a nid-stats hash body */
+ if (obd->obd_nid_stats_hash) {
+ cfs_hash_putref(obd->obd_nid_stats_hash);
+ obd->obd_nid_stats_hash = NULL;
+ }
+
+ class_decref(obd, "setup", obd);
+ obd->obd_set_up = 0;
+
+ return 0;
+}
+EXPORT_SYMBOL(class_cleanup);
+
+struct obd_device *class_incref(struct obd_device *obd,
+ const char *scope, const void *source)
+{
+ lu_ref_add_atomic(&obd->obd_reference, scope, source);
+ atomic_inc(&obd->obd_refcount);
+ CDEBUG(D_INFO, "incref %s (%p) now %d\n", obd->obd_name, obd,
+ atomic_read(&obd->obd_refcount));
+
+ return obd;
+}
+EXPORT_SYMBOL(class_incref);
+
+void class_decref(struct obd_device *obd, const char *scope, const void *source)
+{
+ int err;
+ int refs;
+
+ spin_lock(&obd->obd_dev_lock);
+ atomic_dec(&obd->obd_refcount);
+ refs = atomic_read(&obd->obd_refcount);
+ spin_unlock(&obd->obd_dev_lock);
+ lu_ref_del(&obd->obd_reference, scope, source);
+
+ CDEBUG(D_INFO, "Decref %s (%p) now %d\n", obd->obd_name, obd, refs);
+
+ if ((refs == 1) && obd->obd_stopping) {
+ /* All exports have been destroyed; there should
+ be no more in-progress ops by this point.*/
+
+ spin_lock(&obd->obd_self_export->exp_lock);
+ obd->obd_self_export->exp_flags |= exp_flags_from_obd(obd);
+ spin_unlock(&obd->obd_self_export->exp_lock);
+
+ /* note that we'll recurse into class_decref again */
+ class_unlink_export(obd->obd_self_export);
+ return;
+ }
+
+ if (refs == 0) {
+ CDEBUG(D_CONFIG, "finishing cleanup of obd %s (%s)\n",
+ obd->obd_name, obd->obd_uuid.uuid);
+ LASSERT(!obd->obd_attached);
+ if (obd->obd_stopping) {
+ /* If we're not stopping, we were never set up */
+ err = obd_cleanup(obd);
+ if (err)
+ CERROR("Cleanup %s returned %d\n",
+ obd->obd_name, err);
+ }
+ if (OBP(obd, detach)) {
+ err = OBP(obd, detach)(obd);
+ if (err)
+ CERROR("Detach returned %d\n", err);
+ }
+ class_release_dev(obd);
+ }
+}
+EXPORT_SYMBOL(class_decref);
+
+/** Add a failover nid location.
+ * Client obd types contact server obd types using this nid list.
+ */
+int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
+{
+ struct obd_import *imp;
+ struct obd_uuid uuid;
+ int rc;
+
+ if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
+ LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
+ CERROR("invalid conn_uuid\n");
+ return -EINVAL;
+ }
+ if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
+ strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) &&
+ strcmp(obd->obd_type->typ_name, LUSTRE_OSP_NAME) &&
+ strcmp(obd->obd_type->typ_name, LUSTRE_LWP_NAME) &&
+ strcmp(obd->obd_type->typ_name, LUSTRE_MGC_NAME)) {
+ CERROR("can't add connection on non-client dev\n");
+ return -EINVAL;
+ }
+
+ imp = obd->u.cli.cl_import;
+ if (!imp) {
+ CERROR("try to add conn on immature client dev\n");
+ return -EINVAL;
+ }
+
+ obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
+ rc = obd_add_conn(imp, &uuid, lcfg->lcfg_num);
+
+ return rc;
+}
+EXPORT_SYMBOL(class_add_conn);
+
+/** Remove a failover nid location.
+ */
+int class_del_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
+{
+ struct obd_import *imp;
+ struct obd_uuid uuid;
+ int rc;
+
+ if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
+ LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
+ CERROR("invalid conn_uuid\n");
+ return -EINVAL;
+ }
+ if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
+ strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME)) {
+ CERROR("can't del connection on non-client dev\n");
+ return -EINVAL;
+ }
+
+ imp = obd->u.cli.cl_import;
+ if (!imp) {
+ CERROR("try to del conn on immature client dev\n");
+ return -EINVAL;
+ }
+
+ obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
+ rc = obd_del_conn(imp, &uuid);
+
+ return rc;
+}
+
+LIST_HEAD(lustre_profile_list);
+
+struct lustre_profile *class_get_profile(const char *prof)
+{
+ struct lustre_profile *lprof;
+
+ list_for_each_entry(lprof, &lustre_profile_list, lp_list) {
+ if (!strcmp(lprof->lp_profile, prof)) {
+ return lprof;
+ }
+ }
+ return NULL;
+}
+EXPORT_SYMBOL(class_get_profile);
+
+/** Create a named "profile".
+ * This defines the mdc and osc names to use for a client.
+ * This also is used to define the lov to be used by a mdt.
+ */
+int class_add_profile(int proflen, char *prof, int osclen, char *osc,
+ int mdclen, char *mdc)
+{
+ struct lustre_profile *lprof;
+ int err = 0;
+
+ CDEBUG(D_CONFIG, "Add profile %s\n", prof);
+
+ OBD_ALLOC(lprof, sizeof(*lprof));
+ if (lprof == NULL)
+ return -ENOMEM;
+ INIT_LIST_HEAD(&lprof->lp_list);
+
+ LASSERT(proflen == (strlen(prof) + 1));
+ OBD_ALLOC(lprof->lp_profile, proflen);
+ if (lprof->lp_profile == NULL) {
+ err = -ENOMEM;
+ goto out;
+ }
+ memcpy(lprof->lp_profile, prof, proflen);
+
+ LASSERT(osclen == (strlen(osc) + 1));
+ OBD_ALLOC(lprof->lp_dt, osclen);
+ if (lprof->lp_dt == NULL) {
+ err = -ENOMEM;
+ goto out;
+ }
+ memcpy(lprof->lp_dt, osc, osclen);
+
+ if (mdclen > 0) {
+ LASSERT(mdclen == (strlen(mdc) + 1));
+ OBD_ALLOC(lprof->lp_md, mdclen);
+ if (lprof->lp_md == NULL) {
+ err = -ENOMEM;
+ goto out;
+ }
+ memcpy(lprof->lp_md, mdc, mdclen);
+ }
+
+ list_add(&lprof->lp_list, &lustre_profile_list);
+ return err;
+
+out:
+ if (lprof->lp_md)
+ OBD_FREE(lprof->lp_md, mdclen);
+ if (lprof->lp_dt)
+ OBD_FREE(lprof->lp_dt, osclen);
+ if (lprof->lp_profile)
+ OBD_FREE(lprof->lp_profile, proflen);
+ OBD_FREE(lprof, sizeof(*lprof));
+ return err;
+}
+
+void class_del_profile(const char *prof)
+{
+ struct lustre_profile *lprof;
+
+ CDEBUG(D_CONFIG, "Del profile %s\n", prof);
+
+ lprof = class_get_profile(prof);
+ if (lprof) {
+ list_del(&lprof->lp_list);
+ OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
+ OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
+ if (lprof->lp_md)
+ OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
+ OBD_FREE(lprof, sizeof(*lprof));
+ }
+}
+EXPORT_SYMBOL(class_del_profile);
+
+/* COMPAT_146 */
+void class_del_profiles(void)
+{
+ struct lustre_profile *lprof, *n;
+
+ list_for_each_entry_safe(lprof, n, &lustre_profile_list, lp_list) {
+ list_del(&lprof->lp_list);
+ OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
+ OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
+ if (lprof->lp_md)
+ OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
+ OBD_FREE(lprof, sizeof(*lprof));
+ }
+}
+EXPORT_SYMBOL(class_del_profiles);
+
+static int class_set_global(char *ptr, int val, struct lustre_cfg *lcfg)
+{
+ if (class_match_param(ptr, PARAM_AT_MIN, NULL) == 0)
+ at_min = val;
+ else if (class_match_param(ptr, PARAM_AT_MAX, NULL) == 0)
+ at_max = val;
+ else if (class_match_param(ptr, PARAM_AT_EXTRA, NULL) == 0)
+ at_extra = val;
+ else if (class_match_param(ptr, PARAM_AT_EARLY_MARGIN, NULL) == 0)
+ at_early_margin = val;
+ else if (class_match_param(ptr, PARAM_AT_HISTORY, NULL) == 0)
+ at_history = val;
+ else if (class_match_param(ptr, PARAM_JOBID_VAR, NULL) == 0)
+ strlcpy(obd_jobid_var, lustre_cfg_string(lcfg, 2),
+ JOBSTATS_JOBID_VAR_MAX_LEN + 1);
+ else
+ return -EINVAL;
+
+ CDEBUG(D_IOCTL, "global %s = %d\n", ptr, val);
+ return 0;
+}
+
+
+/* We can't call ll_process_config or lquota_process_config directly because
+ * it lives in a module that must be loaded after this one. */
+static int (*client_process_config)(struct lustre_cfg *lcfg) = NULL;
+static int (*quota_process_config)(struct lustre_cfg *lcfg) = NULL;
+
+void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg))
+{
+ client_process_config = cpc;
+}
+EXPORT_SYMBOL(lustre_register_client_process_config);
+
+/**
+ * Rename the proc parameter in \a cfg with a new name \a new_name.
+ *
+ * \param cfg config structure which contains the proc parameter
+ * \param new_name new name of the proc parameter
+ *
+ * \retval valid-pointer pointer to the newly-allocated config structure
+ * which contains the renamed proc parameter
+ * \retval ERR_PTR(-EINVAL) if \a cfg or \a new_name is NULL, or \a cfg does
+ * not contain a proc parameter
+ * \retval ERR_PTR(-ENOMEM) if memory allocation failure occurs
+ */
+struct lustre_cfg *lustre_cfg_rename(struct lustre_cfg *cfg,
+ const char *new_name)
+{
+ struct lustre_cfg_bufs *bufs = NULL;
+ struct lustre_cfg *new_cfg = NULL;
+ char *param = NULL;
+ char *new_param = NULL;
+ char *value = NULL;
+ int name_len = 0;
+ int new_len = 0;
+
+ if (cfg == NULL || new_name == NULL)
+ return ERR_PTR(-EINVAL);
+
+ param = lustre_cfg_string(cfg, 1);
+ if (param == NULL)
+ return ERR_PTR(-EINVAL);
+
+ value = strchr(param, '=');
+ if (value == NULL)
+ name_len = strlen(param);
+ else
+ name_len = value - param;
+
+ new_len = LUSTRE_CFG_BUFLEN(cfg, 1) + strlen(new_name) - name_len;
+
+ OBD_ALLOC(new_param, new_len);
+ if (new_param == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ strcpy(new_param, new_name);
+ if (value != NULL)
+ strcat(new_param, value);
+
+ OBD_ALLOC_PTR(bufs);
+ if (bufs == NULL) {
+ OBD_FREE(new_param, new_len);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ lustre_cfg_bufs_reset(bufs, NULL);
+ lustre_cfg_bufs_init(bufs, cfg);
+ lustre_cfg_bufs_set_string(bufs, 1, new_param);
+
+ new_cfg = lustre_cfg_new(cfg->lcfg_command, bufs);
+
+ OBD_FREE(new_param, new_len);
+ OBD_FREE_PTR(bufs);
+ if (new_cfg == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ new_cfg->lcfg_num = cfg->lcfg_num;
+ new_cfg->lcfg_flags = cfg->lcfg_flags;
+ new_cfg->lcfg_nid = cfg->lcfg_nid;
+ new_cfg->lcfg_nal = cfg->lcfg_nal;
+
+ return new_cfg;
+}
+EXPORT_SYMBOL(lustre_cfg_rename);
+
+static int process_param2_config(struct lustre_cfg *lcfg)
+{
+ char *param = lustre_cfg_string(lcfg, 1);
+ char *upcall = lustre_cfg_string(lcfg, 2);
+ char *argv[] = {
+ [0] = "/usr/sbin/lctl",
+ [1] = "set_param",
+ [2] = param,
+ [3] = NULL
+ };
+ struct timeval start;
+ struct timeval end;
+ int rc;
+
+
+ /* Add upcall processing here. Now only lctl is supported */
+ if (strcmp(upcall, LCTL_UPCALL) != 0) {
+ CERROR("Unsupported upcall %s\n", upcall);
+ return -EINVAL;
+ }
+
+ do_gettimeofday(&start);
+ rc = call_usermodehelper(argv[0], argv, NULL, 1);
+ do_gettimeofday(&end);
+
+ if (rc < 0) {
+ CERROR(
+ "lctl: error invoking upcall %s %s %s: rc = %d; time %ldus\n",
+ argv[0], argv[1], argv[2], rc,
+ cfs_timeval_sub(&end, &start, NULL));
+ } else {
+ CDEBUG(D_HA, "lctl: invoked upcall %s %s %s, time %ldus\n",
+ argv[0], argv[1], argv[2],
+ cfs_timeval_sub(&end, &start, NULL));
+ rc = 0;
+ }
+
+ return rc;
+}
+
+void lustre_register_quota_process_config(int (*qpc)(struct lustre_cfg *lcfg))
+{
+ quota_process_config = qpc;
+}
+EXPORT_SYMBOL(lustre_register_quota_process_config);
+
+/** Process configuration commands given in lustre_cfg form.
+ * These may come from direct calls (e.g. class_manual_cleanup)
+ * or processing the config llog, or ioctl from lctl.
+ */
+int class_process_config(struct lustre_cfg *lcfg)
+{
+ struct obd_device *obd;
+ int err;
+
+ LASSERT(lcfg && !IS_ERR(lcfg));
+ CDEBUG(D_IOCTL, "processing cmd: %x\n", lcfg->lcfg_command);
+
+ /* Commands that don't need a device */
+ switch (lcfg->lcfg_command) {
+ case LCFG_ATTACH: {
+ err = class_attach(lcfg);
+ goto out;
+ }
+ case LCFG_ADD_UUID: {
+ CDEBUG(D_IOCTL, "adding mapping from uuid %s to nid %#llx (%s)\n",
+ lustre_cfg_string(lcfg, 1), lcfg->lcfg_nid,
+ libcfs_nid2str(lcfg->lcfg_nid));
+
+ err = class_add_uuid(lustre_cfg_string(lcfg, 1), lcfg->lcfg_nid);
+ goto out;
+ }
+ case LCFG_DEL_UUID: {
+ CDEBUG(D_IOCTL, "removing mappings for uuid %s\n",
+ (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) == 0)
+ ? "<all uuids>" : lustre_cfg_string(lcfg, 1));
+
+ err = class_del_uuid(lustre_cfg_string(lcfg, 1));
+ goto out;
+ }
+ case LCFG_MOUNTOPT: {
+ CDEBUG(D_IOCTL, "mountopt: profile %s osc %s mdc %s\n",
+ lustre_cfg_string(lcfg, 1),
+ lustre_cfg_string(lcfg, 2),
+ lustre_cfg_string(lcfg, 3));
+ /* set these mount options somewhere, so ll_fill_super
+ * can find them. */
+ err = class_add_profile(LUSTRE_CFG_BUFLEN(lcfg, 1),
+ lustre_cfg_string(lcfg, 1),
+ LUSTRE_CFG_BUFLEN(lcfg, 2),
+ lustre_cfg_string(lcfg, 2),
+ LUSTRE_CFG_BUFLEN(lcfg, 3),
+ lustre_cfg_string(lcfg, 3));
+ goto out;
+ }
+ case LCFG_DEL_MOUNTOPT: {
+ CDEBUG(D_IOCTL, "mountopt: profile %s\n",
+ lustre_cfg_string(lcfg, 1));
+ class_del_profile(lustre_cfg_string(lcfg, 1));
+ err = 0;
+ goto out;
+ }
+ case LCFG_SET_TIMEOUT: {
+ CDEBUG(D_IOCTL, "changing lustre timeout from %d to %d\n",
+ obd_timeout, lcfg->lcfg_num);
+ obd_timeout = max(lcfg->lcfg_num, 1U);
+ obd_timeout_set = 1;
+ err = 0;
+ goto out;
+ }
+ case LCFG_SET_LDLM_TIMEOUT: {
+ CDEBUG(D_IOCTL, "changing lustre ldlm_timeout from %d to %d\n",
+ ldlm_timeout, lcfg->lcfg_num);
+ ldlm_timeout = max(lcfg->lcfg_num, 1U);
+ if (ldlm_timeout >= obd_timeout)
+ ldlm_timeout = max(obd_timeout / 3, 1U);
+ ldlm_timeout_set = 1;
+ err = 0;
+ goto out;
+ }
+ case LCFG_SET_UPCALL: {
+ LCONSOLE_ERROR_MSG(0x15a, "recovery upcall is deprecated\n");
+ /* COMPAT_146 Don't fail on old configs */
+ err = 0;
+ goto out;
+ }
+ case LCFG_MARKER: {
+ struct cfg_marker *marker;
+ marker = lustre_cfg_buf(lcfg, 1);
+ CDEBUG(D_IOCTL, "marker %d (%#x) %.16s %s\n", marker->cm_step,
+ marker->cm_flags, marker->cm_tgtname, marker->cm_comment);
+ err = 0;
+ goto out;
+ }
+ case LCFG_PARAM: {
+ char *tmp;
+ /* llite has no obd */
+ if ((class_match_param(lustre_cfg_string(lcfg, 1),
+ PARAM_LLITE, NULL) == 0) &&
+ client_process_config) {
+ err = (*client_process_config)(lcfg);
+ goto out;
+ } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
+ PARAM_SYS, &tmp) == 0)) {
+ /* Global param settings */
+ err = class_set_global(tmp, lcfg->lcfg_num, lcfg);
+ /*
+ * Client or server should not fail to mount if
+ * it hits an unknown configuration parameter.
+ */
+ if (err != 0)
+ CWARN("Ignoring unknown param %s\n", tmp);
+
+ err = 0;
+ goto out;
+ } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
+ PARAM_QUOTA, &tmp) == 0) &&
+ quota_process_config) {
+ err = (*quota_process_config)(lcfg);
+ goto out;
+ }
+
+ break;
+ }
+ case LCFG_SET_PARAM: {
+ err = process_param2_config(lcfg);
+ goto out;
+ }
+ }
+ /* Commands that require a device */
+ obd = class_name2obd(lustre_cfg_string(lcfg, 0));
+ if (obd == NULL) {
+ if (!LUSTRE_CFG_BUFLEN(lcfg, 0))
+ CERROR("this lcfg command requires a device name\n");
+ else
+ CERROR("no device for: %s\n",
+ lustre_cfg_string(lcfg, 0));
+
+ err = -EINVAL;
+ goto out;
+ }
+
+ switch (lcfg->lcfg_command) {
+ case LCFG_SETUP: {
+ err = class_setup(obd, lcfg);
+ goto out;
+ }
+ case LCFG_DETACH: {
+ err = class_detach(obd, lcfg);
+ err = 0;
+ goto out;
+ }
+ case LCFG_CLEANUP: {
+ err = class_cleanup(obd, lcfg);
+ err = 0;
+ goto out;
+ }
+ case LCFG_ADD_CONN: {
+ err = class_add_conn(obd, lcfg);
+ err = 0;
+ goto out;
+ }
+ case LCFG_DEL_CONN: {
+ err = class_del_conn(obd, lcfg);
+ err = 0;
+ goto out;
+ }
+ case LCFG_POOL_NEW: {
+ err = obd_pool_new(obd, lustre_cfg_string(lcfg, 2));
+ err = 0;
+ goto out;
+ }
+ case LCFG_POOL_ADD: {
+ err = obd_pool_add(obd, lustre_cfg_string(lcfg, 2),
+ lustre_cfg_string(lcfg, 3));
+ err = 0;
+ goto out;
+ }
+ case LCFG_POOL_REM: {
+ err = obd_pool_rem(obd, lustre_cfg_string(lcfg, 2),
+ lustre_cfg_string(lcfg, 3));
+ err = 0;
+ goto out;
+ }
+ case LCFG_POOL_DEL: {
+ err = obd_pool_del(obd, lustre_cfg_string(lcfg, 2));
+ err = 0;
+ goto out;
+ }
+ default: {
+ err = obd_process_config(obd, sizeof(*lcfg), lcfg);
+ goto out;
+
+ }
+ }
+out:
+ if ((err < 0) && !(lcfg->lcfg_command & LCFG_REQUIRED)) {
+ CWARN("Ignoring error %d on optional command %#x\n", err,
+ lcfg->lcfg_command);
+ err = 0;
+ }
+ return err;
+}
+EXPORT_SYMBOL(class_process_config);
+
+int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
+ struct lustre_cfg *lcfg, void *data)
+{
+ struct lprocfs_vars *var;
+ struct file fakefile;
+ struct seq_file fake_seqfile;
+ char *key, *sval;
+ int i, keylen, vallen;
+ int matched = 0, j = 0;
+ int rc = 0;
+ int skip = 0;
+
+ if (lcfg->lcfg_command != LCFG_PARAM) {
+ CERROR("Unknown command: %d\n", lcfg->lcfg_command);
+ return -EINVAL;
+ }
+
+ /* fake a seq file so that var->fops->write can work... */
+ fakefile.private_data = &fake_seqfile;
+ fake_seqfile.private = data;
+ /* e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
+ or lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
+ or lctl conf_param lustre-OST0000.osc.max_dirty_mb=36 */
+ for (i = 1; i < lcfg->lcfg_bufcount; i++) {
+ key = lustre_cfg_buf(lcfg, i);
+ /* Strip off prefix */
+ class_match_param(key, prefix, &key);
+ sval = strchr(key, '=');
+ if (!sval || (*(sval + 1) == 0)) {
+ CERROR("Can't parse param %s (missing '=')\n", key);
+ /* rc = -EINVAL; continue parsing other params */
+ continue;
+ }
+ keylen = sval - key;
+ sval++;
+ vallen = strlen(sval);
+ matched = 0;
+ j = 0;
+ /* Search proc entries */
+ while (lvars[j].name) {
+ var = &lvars[j];
+ if (class_match_param(key, (char *)var->name, NULL) == 0
+ && keylen == strlen(var->name)) {
+ matched++;
+ rc = -EROFS;
+ if (var->fops && var->fops->write) {
+ mm_segment_t oldfs;
+ oldfs = get_fs();
+ set_fs(KERNEL_DS);
+ rc = (var->fops->write)(&fakefile, sval,
+ vallen, NULL);
+ set_fs(oldfs);
+ }
+ break;
+ }
+ j++;
+ }
+ if (!matched) {
+ /* If the prefix doesn't match, return error so we
+ can pass it down the stack */
+ if (strnchr(key, keylen, '.'))
+ return -ENOSYS;
+ CERROR("%s: unknown param %s\n",
+ (char *)lustre_cfg_string(lcfg, 0), key);
+ /* rc = -EINVAL; continue parsing other params */
+ skip++;
+ } else if (rc < 0) {
+ CERROR("writing proc entry %s err %d\n",
+ var->name, rc);
+ rc = 0;
+ } else {
+ CDEBUG(D_CONFIG, "%s.%.*s: Set parameter %.*s=%s\n",
+ lustre_cfg_string(lcfg, 0),
+ (int)strlen(prefix) - 1, prefix,
+ (int)(sval - key - 1), key, sval);
+ }
+ }
+
+ if (rc > 0)
+ rc = 0;
+ if (!rc && skip)
+ rc = skip;
+ return rc;
+}
+EXPORT_SYMBOL(class_process_proc_param);
+
+extern int lustre_check_exclusion(struct super_block *sb, char *svname);
+
+/** Parse a configuration llog, doing various manipulations on them
+ * for various reasons, (modifications for compatibility, skip obsolete
+ * records, change uuids, etc), then class_process_config() resulting
+ * net records.
+ */
+int class_config_llog_handler(const struct lu_env *env,
+ struct llog_handle *handle,
+ struct llog_rec_hdr *rec, void *data)
+{
+ struct config_llog_instance *clli = data;
+ int cfg_len = rec->lrh_len;
+ char *cfg_buf = (char *) (rec + 1);
+ int rc = 0;
+
+ //class_config_dump_handler(handle, rec, data);
+
+ switch (rec->lrh_type) {
+ case OBD_CFG_REC: {
+ struct lustre_cfg *lcfg, *lcfg_new;
+ struct lustre_cfg_bufs bufs;
+ char *inst_name = NULL;
+ int inst_len = 0;
+ int inst = 0, swab = 0;
+
+ lcfg = (struct lustre_cfg *)cfg_buf;
+ if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) {
+ lustre_swab_lustre_cfg(lcfg);
+ swab = 1;
+ }
+
+ rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
+ if (rc)
+ goto out;
+
+ /* Figure out config state info */
+ if (lcfg->lcfg_command == LCFG_MARKER) {
+ struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
+ lustre_swab_cfg_marker(marker, swab,
+ LUSTRE_CFG_BUFLEN(lcfg, 1));
+ CDEBUG(D_CONFIG, "Marker, inst_flg=%#x mark_flg=%#x\n",
+ clli->cfg_flags, marker->cm_flags);
+ if (marker->cm_flags & CM_START) {
+ /* all previous flags off */
+ clli->cfg_flags = CFG_F_MARKER;
+ if (marker->cm_flags & CM_SKIP) {
+ clli->cfg_flags |= CFG_F_SKIP;
+ CDEBUG(D_CONFIG, "SKIP #%d\n",
+ marker->cm_step);
+ } else if ((marker->cm_flags & CM_EXCLUDE) ||
+ (clli->cfg_sb &&
+ lustre_check_exclusion(clli->cfg_sb,
+ marker->cm_tgtname))) {
+ clli->cfg_flags |= CFG_F_EXCLUDE;
+ CDEBUG(D_CONFIG, "EXCLUDE %d\n",
+ marker->cm_step);
+ }
+ } else if (marker->cm_flags & CM_END) {
+ clli->cfg_flags = 0;
+ }
+ }
+ /* A config command without a start marker before it is
+ illegal (post 146) */
+ if (!(clli->cfg_flags & CFG_F_COMPAT146) &&
+ !(clli->cfg_flags & CFG_F_MARKER) &&
+ (lcfg->lcfg_command != LCFG_MARKER)) {
+ CWARN("Config not inside markers, ignoring! (inst: %p, uuid: %s, flags: %#x)\n",
+ clli->cfg_instance,
+ clli->cfg_uuid.uuid, clli->cfg_flags);
+ clli->cfg_flags |= CFG_F_SKIP;
+ }
+ if (clli->cfg_flags & CFG_F_SKIP) {
+ CDEBUG(D_CONFIG, "skipping %#x\n",
+ clli->cfg_flags);
+ rc = 0;
+ /* No processing! */
+ break;
+ }
+
+ /*
+ * For interoperability between 1.8 and 2.0,
+ * rename "mds" obd device type to "mdt".
+ */
+ {
+ char *typename = lustre_cfg_string(lcfg, 1);
+ char *index = lustre_cfg_string(lcfg, 2);
+
+ if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
+ strcmp(typename, "mds") == 0)) {
+ CWARN("For 1.8 interoperability, rename obd type from mds to mdt\n");
+ typename[2] = 't';
+ }
+ if ((lcfg->lcfg_command == LCFG_SETUP && index &&
+ strcmp(index, "type") == 0)) {
+ CDEBUG(D_INFO, "For 1.8 interoperability, set this index to '0'\n");
+ index[0] = '0';
+ index[1] = 0;
+ }
+ }
+
+
+ if (clli->cfg_flags & CFG_F_EXCLUDE) {
+ CDEBUG(D_CONFIG, "cmd: %x marked EXCLUDED\n",
+ lcfg->lcfg_command);
+ if (lcfg->lcfg_command == LCFG_LOV_ADD_OBD)
+ /* Add inactive instead */
+ lcfg->lcfg_command = LCFG_LOV_ADD_INA;
+ }
+
+ lustre_cfg_bufs_init(&bufs, lcfg);
+
+ if (clli && clli->cfg_instance &&
+ LUSTRE_CFG_BUFLEN(lcfg, 0) > 0){
+ inst = 1;
+ inst_len = LUSTRE_CFG_BUFLEN(lcfg, 0) +
+ sizeof(clli->cfg_instance) * 2 + 4;
+ OBD_ALLOC(inst_name, inst_len);
+ if (inst_name == NULL) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ sprintf(inst_name, "%s-%p",
+ lustre_cfg_string(lcfg, 0),
+ clli->cfg_instance);
+ lustre_cfg_bufs_set_string(&bufs, 0, inst_name);
+ CDEBUG(D_CONFIG, "cmd %x, instance name: %s\n",
+ lcfg->lcfg_command, inst_name);
+ }
+
+ /* we override the llog's uuid for clients, to insure they
+ are unique */
+ if (clli && clli->cfg_instance != NULL &&
+ lcfg->lcfg_command == LCFG_ATTACH) {
+ lustre_cfg_bufs_set_string(&bufs, 2,
+ clli->cfg_uuid.uuid);
+ }
+ /*
+ * sptlrpc config record, we expect 2 data segments:
+ * [0]: fs_name/target_name,
+ * [1]: rule string
+ * moving them to index [1] and [2], and insert MGC's
+ * obdname at index [0].
+ */
+ if (clli && clli->cfg_instance == NULL &&
+ lcfg->lcfg_command == LCFG_SPTLRPC_CONF) {
+ lustre_cfg_bufs_set(&bufs, 2, bufs.lcfg_buf[1],
+ bufs.lcfg_buflen[1]);
+ lustre_cfg_bufs_set(&bufs, 1, bufs.lcfg_buf[0],
+ bufs.lcfg_buflen[0]);
+ lustre_cfg_bufs_set_string(&bufs, 0,
+ clli->cfg_obdname);
+ }
+
+ lcfg_new = lustre_cfg_new(lcfg->lcfg_command, &bufs);
+
+ lcfg_new->lcfg_num = lcfg->lcfg_num;
+ lcfg_new->lcfg_flags = lcfg->lcfg_flags;
+
+ /* XXX Hack to try to remain binary compatible with
+ * pre-newconfig logs */
+ if (lcfg->lcfg_nal != 0 && /* pre-newconfig log? */
+ (lcfg->lcfg_nid >> 32) == 0) {
+ __u32 addr = (__u32)(lcfg->lcfg_nid & 0xffffffff);
+
+ lcfg_new->lcfg_nid =
+ LNET_MKNID(LNET_MKNET(lcfg->lcfg_nal, 0), addr);
+ CWARN("Converted pre-newconfig NAL %d NID %x to %s\n",
+ lcfg->lcfg_nal, addr,
+ libcfs_nid2str(lcfg_new->lcfg_nid));
+ } else {
+ lcfg_new->lcfg_nid = lcfg->lcfg_nid;
+ }
+
+ lcfg_new->lcfg_nal = 0; /* illegal value for obsolete field */
+
+ rc = class_process_config(lcfg_new);
+ lustre_cfg_free(lcfg_new);
+
+ if (inst)
+ OBD_FREE(inst_name, inst_len);
+ break;
+ }
+ default:
+ CERROR("Unknown llog record type %#x encountered\n",
+ rec->lrh_type);
+ break;
+ }
+out:
+ if (rc) {
+ CERROR("%s: cfg command failed: rc = %d\n",
+ handle->lgh_ctxt->loc_obd->obd_name, rc);
+ class_config_dump_handler(NULL, handle, rec, data);
+ }
+ return rc;
+}
+EXPORT_SYMBOL(class_config_llog_handler);
+
+int class_config_parse_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
+ char *name, struct config_llog_instance *cfg)
+{
+ struct llog_process_cat_data cd = {0, 0};
+ struct llog_handle *llh;
+ llog_cb_t callback;
+ int rc;
+
+ CDEBUG(D_INFO, "looking up llog %s\n", name);
+ rc = llog_open(env, ctxt, &llh, NULL, name, LLOG_OPEN_EXISTS);
+ if (rc)
+ return rc;
+
+ rc = llog_init_handle(env, llh, LLOG_F_IS_PLAIN, NULL);
+ if (rc)
+ goto parse_out;
+
+ /* continue processing from where we last stopped to end-of-log */
+ if (cfg) {
+ cd.lpcd_first_idx = cfg->cfg_last_idx;
+ callback = cfg->cfg_callback;
+ LASSERT(callback != NULL);
+ } else {
+ callback = class_config_llog_handler;
+ }
+
+ cd.lpcd_last_idx = 0;
+
+ rc = llog_process(env, llh, callback, cfg, &cd);
+
+ CDEBUG(D_CONFIG, "Processed log %s gen %d-%d (rc=%d)\n", name,
+ cd.lpcd_first_idx + 1, cd.lpcd_last_idx, rc);
+ if (cfg)
+ cfg->cfg_last_idx = cd.lpcd_last_idx;
+
+parse_out:
+ llog_close(env, llh);
+ return rc;
+}
+EXPORT_SYMBOL(class_config_parse_llog);
+
+/**
+ * parse config record and output dump in supplied buffer.
+ * This is separated from class_config_dump_handler() to use
+ * for ioctl needs as well
+ */
+int class_config_parse_rec(struct llog_rec_hdr *rec, char *buf, int size)
+{
+ struct lustre_cfg *lcfg = (struct lustre_cfg *)(rec + 1);
+ char *ptr = buf;
+ char *end = buf + size;
+ int rc = 0;
+
+ LASSERT(rec->lrh_type == OBD_CFG_REC);
+ rc = lustre_cfg_sanity_check(lcfg, rec->lrh_len);
+ if (rc < 0)
+ return rc;
+
+ ptr += snprintf(ptr, end-ptr, "cmd=%05x ", lcfg->lcfg_command);
+ if (lcfg->lcfg_flags)
+ ptr += snprintf(ptr, end-ptr, "flags=%#08x ",
+ lcfg->lcfg_flags);
+
+ if (lcfg->lcfg_num)
+ ptr += snprintf(ptr, end-ptr, "num=%#08x ", lcfg->lcfg_num);
+
+ if (lcfg->lcfg_nid)
+ ptr += snprintf(ptr, end-ptr, "nid=%s(%#llx)\n ",
+ libcfs_nid2str(lcfg->lcfg_nid),
+ lcfg->lcfg_nid);
+
+ if (lcfg->lcfg_command == LCFG_MARKER) {
+ struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
+
+ ptr += snprintf(ptr, end-ptr, "marker=%d(%#x)%s '%s'",
+ marker->cm_step, marker->cm_flags,
+ marker->cm_tgtname, marker->cm_comment);
+ } else {
+ int i;
+
+ for (i = 0; i < lcfg->lcfg_bufcount; i++) {
+ ptr += snprintf(ptr, end-ptr, "%d:%s ", i,
+ lustre_cfg_string(lcfg, i));
+ }
+ }
+ /* return consumed bytes */
+ rc = ptr - buf;
+ return rc;
+}
+
+int class_config_dump_handler(const struct lu_env *env,
+ struct llog_handle *handle,
+ struct llog_rec_hdr *rec, void *data)
+{
+ char *outstr;
+ int rc = 0;
+
+ OBD_ALLOC(outstr, 256);
+ if (outstr == NULL)
+ return -ENOMEM;
+
+ if (rec->lrh_type == OBD_CFG_REC) {
+ class_config_parse_rec(rec, outstr, 256);
+ LCONSOLE(D_WARNING, " %s\n", outstr);
+ } else {
+ LCONSOLE(D_WARNING, "unhandled lrh_type: %#x\n", rec->lrh_type);
+ rc = -EINVAL;
+ }
+
+ OBD_FREE(outstr, 256);
+ return rc;
+}
+
+int class_config_dump_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
+ char *name, struct config_llog_instance *cfg)
+{
+ struct llog_handle *llh;
+ int rc;
+
+ LCONSOLE_INFO("Dumping config log %s\n", name);
+
+ rc = llog_open(env, ctxt, &llh, NULL, name, LLOG_OPEN_EXISTS);
+ if (rc)
+ return rc;
+
+ rc = llog_init_handle(env, llh, LLOG_F_IS_PLAIN, NULL);
+ if (rc)
+ goto parse_out;
+
+ rc = llog_process(env, llh, class_config_dump_handler, cfg, NULL);
+parse_out:
+ llog_close(env, llh);
+
+ LCONSOLE_INFO("End config log %s\n", name);
+ return rc;
+}
+EXPORT_SYMBOL(class_config_dump_llog);
+
+/** Call class_cleanup and class_detach.
+ * "Manual" only in the sense that we're faking lcfg commands.
+ */
+int class_manual_cleanup(struct obd_device *obd)
+{
+ char flags[3] = "";
+ struct lustre_cfg *lcfg;
+ struct lustre_cfg_bufs bufs;
+ int rc;
+
+ if (!obd) {
+ CERROR("empty cleanup\n");
+ return -EALREADY;
+ }
+
+ if (obd->obd_force)
+ strcat(flags, "F");
+ if (obd->obd_fail)
+ strcat(flags, "A");
+
+ CDEBUG(D_CONFIG, "Manual cleanup of %s (flags='%s')\n",
+ obd->obd_name, flags);
+
+ lustre_cfg_bufs_reset(&bufs, obd->obd_name);
+ lustre_cfg_bufs_set_string(&bufs, 1, flags);
+ lcfg = lustre_cfg_new(LCFG_CLEANUP, &bufs);
+ if (!lcfg)
+ return -ENOMEM;
+
+ rc = class_process_config(lcfg);
+ if (rc) {
+ CERROR("cleanup failed %d: %s\n", rc, obd->obd_name);
+ goto out;
+ }
+
+ /* the lcfg is almost the same for both ops */
+ lcfg->lcfg_command = LCFG_DETACH;
+ rc = class_process_config(lcfg);
+ if (rc)
+ CERROR("detach failed %d: %s\n", rc, obd->obd_name);
+out:
+ lustre_cfg_free(lcfg);
+ return rc;
+}
+EXPORT_SYMBOL(class_manual_cleanup);
+
+/*
+ * uuid<->export lustre hash operations
+ */
+
+static unsigned
+uuid_hash(struct cfs_hash *hs, const void *key, unsigned mask)
+{
+ return cfs_hash_djb2_hash(((struct obd_uuid *)key)->uuid,
+ sizeof(((struct obd_uuid *)key)->uuid), mask);
+}
+
+static void *
+uuid_key(struct hlist_node *hnode)
+{
+ struct obd_export *exp;
+
+ exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
+
+ return &exp->exp_client_uuid;
+}
+
+/*
+ * NOTE: It is impossible to find an export that is in failed
+ * state with this function
+ */
+static int
+uuid_keycmp(const void *key, struct hlist_node *hnode)
+{
+ struct obd_export *exp;
+
+ LASSERT(key);
+ exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
+
+ return obd_uuid_equals(key, &exp->exp_client_uuid) &&
+ !exp->exp_failed;
+}
+
+static void *
+uuid_export_object(struct hlist_node *hnode)
+{
+ return hlist_entry(hnode, struct obd_export, exp_uuid_hash);
+}
+
+static void
+uuid_export_get(struct cfs_hash *hs, struct hlist_node *hnode)
+{
+ struct obd_export *exp;
+
+ exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
+ class_export_get(exp);
+}
+
+static void
+uuid_export_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
+{
+ struct obd_export *exp;
+
+ exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
+ class_export_put(exp);
+}
+
+static cfs_hash_ops_t uuid_hash_ops = {
+ .hs_hash = uuid_hash,
+ .hs_key = uuid_key,
+ .hs_keycmp = uuid_keycmp,
+ .hs_object = uuid_export_object,
+ .hs_get = uuid_export_get,
+ .hs_put_locked = uuid_export_put_locked,
+};
+
+
+/*
+ * nid<->export hash operations
+ */
+
+static unsigned
+nid_hash(struct cfs_hash *hs, const void *key, unsigned mask)
+{
+ return cfs_hash_djb2_hash(key, sizeof(lnet_nid_t), mask);
+}
+
+static void *
+nid_key(struct hlist_node *hnode)
+{
+ struct obd_export *exp;
+
+ exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
+
+ return &exp->exp_connection->c_peer.nid;
+}
+
+/*
+ * NOTE: It is impossible to find an export that is in failed
+ * state with this function
+ */
+static int
+nid_kepcmp(const void *key, struct hlist_node *hnode)
+{
+ struct obd_export *exp;
+
+ LASSERT(key);
+ exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
+
+ return exp->exp_connection->c_peer.nid == *(lnet_nid_t *)key &&
+ !exp->exp_failed;
+}
+
+static void *
+nid_export_object(struct hlist_node *hnode)
+{
+ return hlist_entry(hnode, struct obd_export, exp_nid_hash);
+}
+
+static void
+nid_export_get(struct cfs_hash *hs, struct hlist_node *hnode)
+{
+ struct obd_export *exp;
+
+ exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
+ class_export_get(exp);
+}
+
+static void
+nid_export_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
+{
+ struct obd_export *exp;
+
+ exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
+ class_export_put(exp);
+}
+
+static cfs_hash_ops_t nid_hash_ops = {
+ .hs_hash = nid_hash,
+ .hs_key = nid_key,
+ .hs_keycmp = nid_kepcmp,
+ .hs_object = nid_export_object,
+ .hs_get = nid_export_get,
+ .hs_put_locked = nid_export_put_locked,
+};
+
+
+/*
+ * nid<->nidstats hash operations
+ */
+
+static void *
+nidstats_key(struct hlist_node *hnode)
+{
+ struct nid_stat *ns;
+
+ ns = hlist_entry(hnode, struct nid_stat, nid_hash);
+
+ return &ns->nid;
+}
+
+static int
+nidstats_keycmp(const void *key, struct hlist_node *hnode)
+{
+ return *(lnet_nid_t *)nidstats_key(hnode) == *(lnet_nid_t *)key;
+}
+
+static void *
+nidstats_object(struct hlist_node *hnode)
+{
+ return hlist_entry(hnode, struct nid_stat, nid_hash);
+}
+
+static void
+nidstats_get(struct cfs_hash *hs, struct hlist_node *hnode)
+{
+ struct nid_stat *ns;
+
+ ns = hlist_entry(hnode, struct nid_stat, nid_hash);
+ nidstat_getref(ns);
+}
+
+static void
+nidstats_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
+{
+ struct nid_stat *ns;
+
+ ns = hlist_entry(hnode, struct nid_stat, nid_hash);
+ nidstat_putref(ns);
+}
+
+static cfs_hash_ops_t nid_stat_hash_ops = {
+ .hs_hash = nid_hash,
+ .hs_key = nidstats_key,
+ .hs_keycmp = nidstats_keycmp,
+ .hs_object = nidstats_object,
+ .hs_get = nidstats_get,
+ .hs_put_locked = nidstats_put_locked,
+};
Code Review / kvmfornfv.git / blobdiff