diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/obdclass/obd_config.c')
| -rw-r--r-- | drivers/staging/lustre/lustre/obdclass/obd_config.c | 1904 |
1 files changed, 1904 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/obdclass/obd_config.c b/drivers/staging/lustre/lustre/obdclass/obd_config.c new file mode 100644 index 000000000000..bbf06d009fd0 --- /dev/null +++ b/drivers/staging/lustre/lustre/obdclass/obd_config.c @@ -0,0 +1,1904 @@ +/* + * 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 <obd_class.h> +#include <linux/string.h> +#include <lustre_log.h> +#include <lprocfs_status.h> +#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; + + if ((ptr = strstr(buf, key)) == 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; + ENTRY; + + 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, rc); + } + 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)); + GOTO(out, rc = -EINVAL); + } + memcpy(obd->obd_uuid.uuid, uuid, len); + + /* do the attach */ + if (OBP(obd, attach)) { + rc = OBP(obd,attach)(obd, sizeof *lcfg, lcfg); + if (rc) + GOTO(out, rc = -EINVAL); + } + + /* 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; + ENTRY; + + 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) + GOTO(err_hash, err = -ENOMEM); + + /* 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) + GOTO(err_hash, err = -ENOMEM); + + /* 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) + GOTO(err_hash, err = -ENOMEM); + + exp = class_new_export(obd, &obd->obd_uuid); + if (IS_ERR(exp)) + GOTO(err_hash, err = PTR_ERR(exp)); + + 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, err); + + 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) +{ + ENTRY; + + 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-progess 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; + ENTRY; + + 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) { + /* refcounf - 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; + ENTRY; + + 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; + ENTRY; + + 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; + + ENTRY; + 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; + ENTRY; + + 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) + GOTO(out, err = -ENOMEM); + memcpy(lprof->lp_profile, prof, proflen); + + LASSERT(osclen == (strlen(osc) + 1)); + OBD_ALLOC(lprof->lp_dt, osclen); + if (lprof->lp_dt == NULL) + GOTO(out, err = -ENOMEM); + 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) + GOTO(out, err = -ENOMEM); + 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; + ENTRY; + + 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); + } + EXIT; +} +EXPORT_SYMBOL(class_del_profile); + +/* COMPAT_146 */ +void class_del_profiles(void) +{ + struct lustre_profile *lprof, *n; + ENTRY; + + 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); + } + EXIT; +} +EXPORT_SYMBOL(class_del_profiles); + +static int class_set_global(char *ptr, int val, struct lustre_cfg *lcfg) +{ + ENTRY; + 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; + ENTRY; + + 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); + +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, err); + } + case LCFG_ADD_UUID: { + CDEBUG(D_IOCTL, "adding mapping from uuid %s to nid "LPX64 + " (%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, err); + } + 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, err); + } + 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, err); + } + case LCFG_DEL_MOUNTOPT: { + CDEBUG(D_IOCTL, "mountopt: profile %s\n", + lustre_cfg_string(lcfg, 1)); + class_del_profile(lustre_cfg_string(lcfg, 1)); + GOTO(out, err = 0); + } + 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; + GOTO(out, err = 0); + } + 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; + GOTO(out, err = 0); + } + case LCFG_SET_UPCALL: { + LCONSOLE_ERROR_MSG(0x15a, "recovery upcall is deprecated\n"); + /* COMPAT_146 Don't fail on old configs */ + GOTO(out, err = 0); + } + 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); + GOTO(out, err = 0); + } + case LCFG_PARAM: { + char *tmp; + /* llite has no obd */ + if ((class_match_param(lustre_cfg_string(lcfg, 1), + PARAM_LLITE, 0) == 0) && + client_process_config) { + err = (*client_process_config)(lcfg); + GOTO(out, err); + } 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); + + GOTO(out, err = 0); + } else if ((class_match_param(lustre_cfg_string(lcfg, 1), + PARAM_QUOTA, &tmp) == 0) && + quota_process_config) { + err = (*quota_process_config)(lcfg); + GOTO(out, err); + } + /* Fall through */ + break; + } + } + + /* 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)); + + GOTO(out, err = -EINVAL); + } + + switch(lcfg->lcfg_command) { + case LCFG_SETUP: { + err = class_setup(obd, lcfg); + GOTO(out, err); + } + case LCFG_DETACH: { + err = class_detach(obd, lcfg); + GOTO(out, err = 0); + } + case LCFG_CLEANUP: { + err = class_cleanup(obd, lcfg); + GOTO(out, err = 0); + } + case LCFG_ADD_CONN: { + err = class_add_conn(obd, lcfg); + GOTO(out, err = 0); + } + case LCFG_DEL_CONN: { + err = class_del_conn(obd, lcfg); + GOTO(out, err = 0); + } + case LCFG_POOL_NEW: { + err = obd_pool_new(obd, lustre_cfg_string(lcfg, 2)); + GOTO(out, err = 0); + break; + } + case LCFG_POOL_ADD: { + err = obd_pool_add(obd, lustre_cfg_string(lcfg, 2), + lustre_cfg_string(lcfg, 3)); + GOTO(out, err = 0); + break; + } + case LCFG_POOL_REM: { + err = obd_pool_rem(obd, lustre_cfg_string(lcfg, 2), + lustre_cfg_string(lcfg, 3)); + GOTO(out, err = 0); + break; + } + case LCFG_POOL_DEL: { + err = obd_pool_del(obd, lustre_cfg_string(lcfg, 2)); + GOTO(out, err = 0); + break; + } + default: { + err = obd_process_config(obd, sizeof(*lcfg), lcfg); + GOTO(out, err); + + } + } +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; + ENTRY; + + 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, 0) == 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; + ENTRY; + + //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, rc); + + /* 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) && + (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) + GOTO(out, rc = -ENOMEM); + 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; + ENTRY; + + 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, rc); + + /* 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; + + ENTRY; + + 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("LPX64")\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; + + ENTRY; + + 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; + + ENTRY; + + 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); + + 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; + ENTRY; + + 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, rc); + } + + /* 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(cfs_hash_t *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(cfs_hash_t *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(cfs_hash_t *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(cfs_hash_t *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(cfs_hash_t *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(cfs_hash_t *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(cfs_hash_t *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(cfs_hash_t *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, +}; |