diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/obdclass/obd_config.c')
| -rw-r--r-- | drivers/staging/lustre/lustre/obdclass/obd_config.c | 1559 |
1 files changed, 0 insertions, 1559 deletions
diff --git a/drivers/staging/lustre/lustre/obdclass/obd_config.c b/drivers/staging/lustre/lustre/obdclass/obd_config.c deleted file mode 100644 index 277576b586db..000000000000 --- a/drivers/staging/lustre/lustre/obdclass/obd_config.c +++ /dev/null @@ -1,1559 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * 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.gnu.org/licenses/gpl-2.0.html - * - * GPL HEADER END - */ -/* - * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. - * Use is subject to license terms. - * - * Copyright (c) 2011, 2015, 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 <linux/string.h> - -#include <uapi/linux/lustre/lustre_ioctl.h> -#include <llog_swab.h> -#include <lprocfs_status.h> -#include <lustre_log.h> -#include <uapi/linux/lustre/lustre_param.h> -#include <obd_class.h> - -#include "llog_internal.h" - -static struct cfs_hash_ops uuid_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) - return 1; - - if (valp) - *valp = ptr + strlen(key); - - return 0; -} -EXPORT_SYMBOL(class_find_param); - -/* returns 0 if this is the first key in the buffer, else 1. - * valp points to first char after key. - */ -static int class_match_param(char *buf, const 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; -} - -static int parse_nid(char *buf, void *value, int quiet) -{ - lnet_nid_t *nid = 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 = 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) - 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); - -char *lustre_cfg_string(struct lustre_cfg *lcfg, u32 index) -{ - char *s; - - if (!lcfg->lcfg_buflens[index]) - return NULL; - - s = lustre_cfg_buf(lcfg, index); - if (!s) - return NULL; - - /* - * make sure it's NULL terminated, even if this kills a char - * of data. Try to use the padding first though. - */ - if (s[lcfg->lcfg_buflens[index] - 1] != '\0') { - size_t last = ALIGN(lcfg->lcfg_buflens[index], 8) - 1; - char lost; - - /* Use the smaller value */ - if (last > lcfg->lcfg_buflens[index]) - last = lcfg->lcfg_buflens[index]; - - lost = s[last]; - s[last] = '\0'; - if (lost != '\0') { - CWARN("Truncated buf %d to '%s' (lost '%c'...)\n", - index, s, lost); - } - } - return s; -} -EXPORT_SYMBOL(lustre_cfg_string); - -/********************** 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. - */ -static 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", - typename, name, 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, "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); - 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 */ - init_waitqueue_head(&obd->obd_evict_inprogress_waitq); - - llog_group_init(&obd->obd_olg); - - 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); - - /* 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) - class_release_dev(obd); - - return rc; -} - -/** Create hashes, self-export, and call type-specific setup. - * Setup is effectively the "start this obd" call. - */ -static int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg) -{ - int err = 0; - struct obd_export *exp; - - LASSERT(obd); - 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; - 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; - } - - exp = class_new_export(obd, &obd->obd_uuid); - if (IS_ERR(exp)) { - err = PTR_ERR(exp); - goto err_hash; - } - - obd->obd_self_export = exp; - 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; - } - obd->obd_starting = 0; - CERROR("setup %s failed (%d)\n", obd->obd_name, err); - return err; -} - -/** We have finished using this obd and are ready to destroy it. - * There can be no more references to this obd. - */ -static 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; -} - -/** 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(). - */ -static 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; - spin_unlock(&obd->obd_dev_lock); - - while (obd->obd_conn_inprogress > 0) - cond_resched(); - smp_rmb(); - - 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); - - /* Precleanup, we must make sure all exports get destroyed. */ - err = obd_precleanup(obd); - 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; - } - - class_decref(obd, "setup", obd); - obd->obd_set_up = 0; - - return 0; -} - -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); - } - class_release_dev(obd); - } -} -EXPORT_SYMBOL(class_decref); - -/** Add a failover nid location. - * Client obd types contact server obd types using this nid list. - */ -static 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; -} - -/** Remove a failover nid location. - */ -static 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; -} - -static LIST_HEAD(lustre_profile_list); -static DEFINE_SPINLOCK(lustre_profile_list_lock); - -struct lustre_profile *class_get_profile(const char *prof) -{ - struct lustre_profile *lprof; - - spin_lock(&lustre_profile_list_lock); - list_for_each_entry(lprof, &lustre_profile_list, lp_list) { - if (!strcmp(lprof->lp_profile, prof)) { - lprof->lp_refs++; - spin_unlock(&lustre_profile_list_lock); - return lprof; - } - } - spin_unlock(&lustre_profile_list_lock); - 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. - */ -static 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); - - lprof = kzalloc(sizeof(*lprof), GFP_NOFS); - if (!lprof) - return -ENOMEM; - INIT_LIST_HEAD(&lprof->lp_list); - - LASSERT(proflen == (strlen(prof) + 1)); - lprof->lp_profile = kmemdup(prof, proflen, GFP_NOFS); - if (!lprof->lp_profile) { - err = -ENOMEM; - goto free_lprof; - } - - LASSERT(osclen == (strlen(osc) + 1)); - lprof->lp_dt = kmemdup(osc, osclen, GFP_NOFS); - if (!lprof->lp_dt) { - err = -ENOMEM; - goto free_lp_profile; - } - - if (mdclen > 0) { - LASSERT(mdclen == (strlen(mdc) + 1)); - lprof->lp_md = kmemdup(mdc, mdclen, GFP_NOFS); - if (!lprof->lp_md) { - err = -ENOMEM; - goto free_lp_dt; - } - } - - spin_lock(&lustre_profile_list_lock); - lprof->lp_refs = 1; - lprof->lp_list_deleted = false; - list_add(&lprof->lp_list, &lustre_profile_list); - spin_unlock(&lustre_profile_list_lock); - return err; - -free_lp_dt: - kfree(lprof->lp_dt); -free_lp_profile: - kfree(lprof->lp_profile); -free_lprof: - kfree(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) { - spin_lock(&lustre_profile_list_lock); - /* because get profile increments the ref counter */ - lprof->lp_refs--; - list_del(&lprof->lp_list); - lprof->lp_list_deleted = true; - spin_unlock(&lustre_profile_list_lock); - - class_put_profile(lprof); - } -} -EXPORT_SYMBOL(class_del_profile); - -void class_put_profile(struct lustre_profile *lprof) -{ - spin_lock(&lustre_profile_list_lock); - if (--lprof->lp_refs > 0) { - LASSERT(lprof->lp_refs > 0); - spin_unlock(&lustre_profile_list_lock); - return; - } - spin_unlock(&lustre_profile_list_lock); - - /* confirm not a negative number */ - LASSERT(!lprof->lp_refs); - - /* - * At least one class_del_profile/profiles must be called - * on the target profile or lustre_profile_list will corrupt - */ - LASSERT(lprof->lp_list_deleted); - kfree(lprof->lp_profile); - kfree(lprof->lp_dt); - kfree(lprof->lp_md); - kfree(lprof); -} -EXPORT_SYMBOL(class_put_profile); - -/* COMPAT_146 */ -void class_del_profiles(void) -{ - struct lustre_profile *lprof, *n; - - spin_lock(&lustre_profile_list_lock); - list_for_each_entry_safe(lprof, n, &lustre_profile_list, lp_list) { - list_del(&lprof->lp_list); - lprof->lp_list_deleted = true; - spin_unlock(&lustre_profile_list_lock); - - class_put_profile(lprof); - - spin_lock(&lustre_profile_list_lock); - } - spin_unlock(&lustre_profile_list_lock); -} -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); -static int (*quota_process_config)(struct lustre_cfg *lcfg); - -void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg)) -{ - client_process_config = cpc; -} -EXPORT_SYMBOL(lustre_register_client_process_config); - -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 - }; - ktime_t start; - ktime_t 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; - } - - start = ktime_get(); - rc = call_usermodehelper(argv[0], argv, NULL, UMH_WAIT_PROC); - end = ktime_get(); - - if (rc < 0) { - CERROR( - "lctl: error invoking upcall %s %s %s: rc = %d; time %ldus\n", - argv[0], argv[1], argv[2], rc, - (long)ktime_us_delta(end, start)); - } else { - CDEBUG(D_HA, "lctl: invoked upcall %s %s %s, time %ldus\n", - argv[0], argv[1], argv[2], - (long)ktime_us_delta(end, start)); - rc = 0; - } - - return rc; -} - -/** 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: { - /* ldlm_timeout is not used on the client */ - 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) { - 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 */ - if (class_match_param(key, prefix, &key)) { - /* - * If the prefix doesn't match, return error so we - * can pass it down the stack - */ - return -ENOSYS; - } - 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, var->name, NULL) && - 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, - (const char __user *)sval, - vallen, NULL); - set_fs(oldfs); - } - break; - } - j++; - } - if (!matched) { - CERROR("%.*s: %s unknown param %s\n", - (int)strlen(prefix) - 1, prefix, - (char *)lustre_cfg_string(lcfg, 0), key); - /* rc = -EINVAL; continue parsing other params */ - skip++; - } else if (rc < 0) { - CERROR("%s: error writing proc entry '%s': rc = %d\n", - prefix, 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); - -/** 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; - - 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; - size_t lcfg_len; - int 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_len = LUSTRE_CFG_BUFLEN(lcfg, 0) + - sizeof(clli->cfg_instance) * 2 + 4; - inst_name = kasprintf(GFP_NOFS, "%s-%p", - lustre_cfg_string(lcfg, 0), - clli->cfg_instance); - if (!inst_name) { - rc = -ENOMEM; - goto out; - } - 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 && - 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 && - 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_len = lustre_cfg_len(bufs.lcfg_bufcount, bufs.lcfg_buflen); - lcfg_new = kzalloc(lcfg_len, GFP_NOFS); - if (!lcfg_new) { - rc = -ENOMEM; - goto out; - } - - lustre_cfg_init(lcfg_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); - kfree(lcfg_new); - kfree(inst_name); - 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); - } 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 - */ -static 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) { - char nidstr[LNET_NIDSTR_SIZE]; - - libcfs_nid2str_r(lcfg->lcfg_nid, nidstr, sizeof(nidstr)); - ptr += snprintf(ptr, end - ptr, "nid=%s(%#llx)\n ", - nidstr, 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)); - } - } - ptr += snprintf(ptr, end - ptr, "\n"); - /* 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; - - outstr = kzalloc(256, GFP_NOFS); - if (!outstr) - return -ENOMEM; - - if (rec->lrh_type == OBD_CFG_REC) { - class_config_parse_rec(rec, outstr, 256); - LCONSOLE(D_WARNING, " %s", outstr); - } else { - LCONSOLE(D_WARNING, "unhandled lrh_type: %#x\n", rec->lrh_type); - rc = -EINVAL; - } - - kfree(outstr); - return rc; -} - -/** 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 = kzalloc(lustre_cfg_len(bufs.lcfg_bufcount, bufs.lcfg_buflen), - GFP_NOFS); - if (!lcfg) - return -ENOMEM; - lustre_cfg_init(lcfg, LCFG_CLEANUP, &bufs); - - 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: - kfree(lcfg); - return rc; -} -EXPORT_SYMBOL(class_manual_cleanup); - -/* - * uuid<->export lustre hash operations - */ - -static unsigned int -uuid_hash(struct cfs_hash *hs, const void *key, unsigned int 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 struct cfs_hash_ops 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, -}; |