+++ /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) 2007, 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_mount_server.c
- *
- * Server mount routines
- *
- * Author: Nathan Rutman <nathan@clusterfs.com>
- */
-
-
-#define DEBUG_SUBSYSTEM S_CLASS
-#define D_MOUNT (D_SUPER | D_CONFIG /* | D_WARNING */)
-#define PRINT_CMD CDEBUG
-#define PRINT_MASK (D_SUPER | D_CONFIG)
-
-#include <obd.h>
-#include <lvfs.h>
-#include <lustre_fsfilt.h>
-#include <obd_class.h>
-#include <lustre/lustre_user.h>
-#include <linux/version.h>
-#include <lustre_log.h>
-#include <lustre_disk.h>
-#include <lustre_param.h>
-
-/*********** mount lookup *********/
-
-DEFINE_MUTEX(lustre_mount_info_lock);
-static LIST_HEAD(server_mount_info_list);
-
-static struct lustre_mount_info *server_find_mount(const char *name)
-{
- struct list_head *tmp;
- struct lustre_mount_info *lmi;
- ENTRY;
-
- list_for_each(tmp, &server_mount_info_list) {
- lmi = list_entry(tmp, struct lustre_mount_info,
- lmi_list_chain);
- if (strcmp(name, lmi->lmi_name) == 0)
- RETURN(lmi);
- }
- RETURN(NULL);
-}
-
-/* we must register an obd for a mount before we call the setup routine.
- *_setup will call lustre_get_mount to get the mnt struct
- by obd_name, since we can't pass the pointer to setup. */
-static int server_register_mount(const char *name, struct super_block *sb,
- struct vfsmount *mnt)
-{
- struct lustre_mount_info *lmi;
- char *name_cp;
- ENTRY;
-
- LASSERT(sb);
-
- OBD_ALLOC(lmi, sizeof(*lmi));
- if (!lmi)
- RETURN(-ENOMEM);
- OBD_ALLOC(name_cp, strlen(name) + 1);
- if (!name_cp) {
- OBD_FREE(lmi, sizeof(*lmi));
- RETURN(-ENOMEM);
- }
- strcpy(name_cp, name);
-
- mutex_lock(&lustre_mount_info_lock);
-
- if (server_find_mount(name)) {
- mutex_unlock(&lustre_mount_info_lock);
- OBD_FREE(lmi, sizeof(*lmi));
- OBD_FREE(name_cp, strlen(name) + 1);
- CERROR("Already registered %s\n", name);
- RETURN(-EEXIST);
- }
- lmi->lmi_name = name_cp;
- lmi->lmi_sb = sb;
- lmi->lmi_mnt = mnt;
- list_add(&lmi->lmi_list_chain, &server_mount_info_list);
-
- mutex_unlock(&lustre_mount_info_lock);
-
- CDEBUG(D_MOUNT, "reg_mnt %p from %s\n", lmi->lmi_mnt, name);
-
- RETURN(0);
-}
-
-/* when an obd no longer needs a mount */
-static int server_deregister_mount(const char *name)
-{
- struct lustre_mount_info *lmi;
- ENTRY;
-
- mutex_lock(&lustre_mount_info_lock);
- lmi = server_find_mount(name);
- if (!lmi) {
- mutex_unlock(&lustre_mount_info_lock);
- CERROR("%s not registered\n", name);
- RETURN(-ENOENT);
- }
-
- CDEBUG(D_MOUNT, "dereg_mnt %p from %s\n", lmi->lmi_mnt, name);
-
- OBD_FREE(lmi->lmi_name, strlen(lmi->lmi_name) + 1);
- list_del(&lmi->lmi_list_chain);
- OBD_FREE(lmi, sizeof(*lmi));
- mutex_unlock(&lustre_mount_info_lock);
-
- RETURN(0);
-}
-
-/* obd's look up a registered mount using their obdname. This is just
- for initial obd setup to find the mount struct. It should not be
- called every time you want to mntget. */
-struct lustre_mount_info *server_get_mount(const char *name)
-{
- struct lustre_mount_info *lmi;
- struct lustre_sb_info *lsi;
- ENTRY;
-
- mutex_lock(&lustre_mount_info_lock);
- lmi = server_find_mount(name);
- mutex_unlock(&lustre_mount_info_lock);
- if (!lmi) {
- CERROR("Can't find mount for %s\n", name);
- RETURN(NULL);
- }
- lsi = s2lsi(lmi->lmi_sb);
-
- atomic_inc(&lsi->lsi_mounts);
-
- CDEBUG(D_MOUNT, "get_mnt %p from %s, refs=%d\n", lmi->lmi_mnt,
- name, atomic_read(&lsi->lsi_mounts));
-
- RETURN(lmi);
-}
-EXPORT_SYMBOL(server_get_mount);
-
-/*
- * Used by mdt to get mount_info from obdname.
- * There are no blocking when using the mount_info.
- * Do not use server_get_mount for this purpose.
- */
-struct lustre_mount_info *server_get_mount_2(const char *name)
-{
- struct lustre_mount_info *lmi;
- ENTRY;
-
- mutex_lock(&lustre_mount_info_lock);
- lmi = server_find_mount(name);
- mutex_unlock(&lustre_mount_info_lock);
- if (!lmi)
- CERROR("Can't find mount for %s\n", name);
-
- RETURN(lmi);
-}
-EXPORT_SYMBOL(server_get_mount_2);
-
-/* to be called from obd_cleanup methods */
-int server_put_mount(const char *name, struct vfsmount *mnt)
-{
- struct lustre_mount_info *lmi;
- struct lustre_sb_info *lsi;
- ENTRY;
-
- mutex_lock(&lustre_mount_info_lock);
- lmi = server_find_mount(name);
- mutex_unlock(&lustre_mount_info_lock);
- if (!lmi) {
- CERROR("Can't find mount for %s\n", name);
- RETURN(-ENOENT);
- }
- lsi = s2lsi(lmi->lmi_sb);
-
- CDEBUG(D_MOUNT, "put_mnt %p from %s, refs=%d\n",
- lmi->lmi_mnt, name, atomic_read(&lsi->lsi_mounts));
-
- if (lustre_put_lsi(lmi->lmi_sb))
- CDEBUG(D_MOUNT, "Last put of mnt %p from %s\n",
- lmi->lmi_mnt, name);
-
- /* this obd should never need the mount again */
- server_deregister_mount(name);
-
- RETURN(0);
-}
-EXPORT_SYMBOL(server_put_mount);
-
-/* Corresponding to server_get_mount_2 */
-int server_put_mount_2(const char *name, struct vfsmount *mnt)
-{
- ENTRY;
- RETURN(0);
-}
-EXPORT_SYMBOL(server_put_mount_2);
-
-/* Set up a MGS to serve startup logs */
-static int server_start_mgs(struct super_block *sb)
-{
- struct lustre_sb_info *lsi = s2lsi(sb);
- struct vfsmount *mnt = lsi->lsi_srv_mnt;
- struct lustre_mount_info *lmi;
- int rc = 0;
- ENTRY;
-
- /* It is impossible to have more than 1 MGS per node, since
- MGC wouldn't know which to connect to */
- lmi = server_find_mount(LUSTRE_MGS_OBDNAME);
- if (lmi) {
- lsi = s2lsi(lmi->lmi_sb);
- LCONSOLE_ERROR_MSG(0x15d, "The MGS service was already started"
- " from server\n");
- RETURN(-EALREADY);
- }
-
- CDEBUG(D_CONFIG, "Start MGS service %s\n", LUSTRE_MGS_OBDNAME);
-
- rc = server_register_mount(LUSTRE_MGS_OBDNAME, sb, mnt);
-
- if (!rc) {
- rc = lustre_start_simple(LUSTRE_MGS_OBDNAME, LUSTRE_MGS_NAME,
- LUSTRE_MGS_OBDNAME, 0, 0,
- lsi->lsi_osd_obdname, 0);
- /* Do NOT call server_deregister_mount() here. This leads to
- * inability cleanup cleanly and free lsi and other stuff when
- * mgs calls server_put_mount() in error handling case. -umka */
- }
-
- if (rc)
- LCONSOLE_ERROR_MSG(0x15e, "Failed to start MGS '%s' (%d). "
- "Is the 'mgs' module loaded?\n",
- LUSTRE_MGS_OBDNAME, rc);
- RETURN(rc);
-}
-
-static int server_stop_mgs(struct super_block *sb)
-{
- struct obd_device *obd;
- int rc;
- ENTRY;
-
- CDEBUG(D_MOUNT, "Stop MGS service %s\n", LUSTRE_MGS_OBDNAME);
-
- /* There better be only one MGS */
- obd = class_name2obd(LUSTRE_MGS_OBDNAME);
- if (!obd) {
- CDEBUG(D_CONFIG, "mgs %s not running\n", LUSTRE_MGS_OBDNAME);
- RETURN(-EALREADY);
- }
-
- /* The MGS should always stop when we say so */
- obd->obd_force = 1;
- rc = class_manual_cleanup(obd);
- RETURN(rc);
-}
-
-/* Since there's only one mgc per node, we have to change it's fs to get
- access to the right disk. */
-static int server_mgc_set_fs(struct obd_device *mgc, struct super_block *sb)
-{
- struct lustre_sb_info *lsi = s2lsi(sb);
- int rc;
- ENTRY;
-
- CDEBUG(D_MOUNT, "Set mgc disk for %s\n", lsi->lsi_lmd->lmd_dev);
-
- /* cl_mgc_sem in mgc insures we sleep if the mgc_fs is busy */
- rc = obd_set_info_async(NULL, mgc->obd_self_export,
- sizeof(KEY_SET_FS), KEY_SET_FS,
- sizeof(*sb), sb, NULL);
- if (rc != 0)
- CERROR("can't set_fs %d\n", rc);
-
- RETURN(rc);
-}
-
-static int server_mgc_clear_fs(struct obd_device *mgc)
-{
- int rc;
- ENTRY;
-
- CDEBUG(D_MOUNT, "Unassign mgc disk\n");
-
- rc = obd_set_info_async(NULL, mgc->obd_self_export,
- sizeof(KEY_CLEAR_FS), KEY_CLEAR_FS,
- 0, NULL, NULL);
- RETURN(rc);
-}
-
-static int is_mdc_device(const char *devname)
-{
- char *ptr;
-
- ptr = strrchr(devname, '-');
- if (ptr != NULL && strcmp(ptr, "-mdc") == 0)
- return 1;
-
- return 0;
-}
-
-static inline int tgt_is_mdt0(const char *tgtname)
-{
- __u32 idx;
- int type;
-
- type = server_name2index(tgtname, &idx, NULL);
- if (type != LDD_F_SV_TYPE_MDT)
- return 0;
-
- return idx == 0;
-}
-
-static inline int is_mdc_for_mdt0(const char *devname)
-{
- char *ptr;
-
- if (!is_mdc_device(devname))
- return 0;
-
- ptr = strrchr(devname, '-');
- if (ptr == NULL)
- return 0;
-
- *ptr = 0;
- if (tgt_is_mdt0(devname)) {
- *ptr = '-';
- return 1;
- }
- *ptr = '-';
- return 0;
-}
-
-/**
- * Convert OST/MDT name(fsname-OSTxxxx) to a lwp name
- * (fsname-MDT0000-lwp-OSTxxxx)
- **/
-int tgt_name2lwpname(const char *svname, char *lwpname)
-{
- char *fsname;
- const char *tgt;
- int rc;
- ENTRY;
-
- OBD_ALLOC(fsname, MTI_NAME_MAXLEN);
- if (fsname == NULL)
- RETURN(-ENOMEM);
-
- rc = server_name2fsname(svname, fsname, &tgt);
- if (rc != 0) {
- CERROR("%s: failed to get fsname from svname. %d\n",
- svname, rc);
- GOTO(cleanup, rc);
- }
-
- if (*tgt != '-' && *tgt != ':') {
- CERROR("%s: invalid svname name!\n", svname);
- GOTO(cleanup, rc = -EINVAL);
- }
-
- tgt++;
- if (strncmp(tgt, "OST", 3) != 0 && strncmp(tgt, "MDT", 3) != 0) {
- CERROR("%s is not an OST or MDT target!\n", svname);
- GOTO(cleanup, rc = -EINVAL);
- }
- sprintf(lwpname, "%s-MDT0000-%s-%s", fsname, LUSTRE_LWP_NAME, tgt);
-cleanup:
- if (fsname != NULL)
- OBD_FREE(fsname, MTI_NAME_MAXLEN);
- RETURN(rc);
-}
-EXPORT_SYMBOL(tgt_name2lwpname);
-
-static LIST_HEAD(lwp_register_list);
-DEFINE_MUTEX(lwp_register_list_lock);
-
-int lustre_register_lwp_item(const char *lwpname, struct obd_export **exp,
- register_lwp_cb cb_func, void *cb_data)
-{
- struct obd_device *lwp;
- struct lwp_register_item *lri;
- ENTRY;
-
- LASSERTF(strlen(lwpname) < MTI_NAME_MAXLEN, "lwpname is too long %s\n",
- lwpname);
- LASSERT(exp != NULL && *exp == NULL);
-
- OBD_ALLOC_PTR(lri);
- if (lri == NULL)
- RETURN(-ENOMEM);
-
- mutex_lock(&lwp_register_list_lock);
-
- lwp = class_name2obd(lwpname);
- if (lwp != NULL && lwp->obd_set_up == 1) {
- struct obd_uuid *uuid;
-
- OBD_ALLOC_PTR(uuid);
- if (uuid == NULL) {
- mutex_unlock(&lwp_register_list_lock);
- OBD_FREE_PTR(lri);
- RETURN(-ENOMEM);
- }
- memcpy(uuid->uuid, lwpname, strlen(lwpname));
- *exp = cfs_hash_lookup(lwp->obd_uuid_hash, uuid);
- OBD_FREE_PTR(uuid);
- }
-
- memcpy(lri->lri_name, lwpname, strlen(lwpname));
- lri->lri_exp = exp;
- lri->lri_cb_func = cb_func;
- lri->lri_cb_data = cb_data;
- INIT_LIST_HEAD(&lri->lri_list);
- list_add(&lri->lri_list, &lwp_register_list);
-
- if (*exp != NULL && cb_func != NULL)
- cb_func(cb_data);
-
- mutex_unlock(&lwp_register_list_lock);
- RETURN(0);
-}
-EXPORT_SYMBOL(lustre_register_lwp_item);
-
-void lustre_deregister_lwp_item(struct obd_export **exp)
-{
- struct lwp_register_item *lri, *tmp;
-
- mutex_lock(&lwp_register_list_lock);
- list_for_each_entry_safe(lri, tmp, &lwp_register_list, lri_list) {
- if (exp == lri->lri_exp) {
- if (*exp)
- class_export_put(*exp);
- list_del(&lri->lri_list);
- OBD_FREE_PTR(lri);
- break;
- }
- }
- mutex_unlock(&lwp_register_list_lock);
-}
-EXPORT_SYMBOL(lustre_deregister_lwp_item);
-
-static void lustre_notify_lwp_list(struct obd_export *exp)
-{
- struct lwp_register_item *lri, *tmp;
- LASSERT(exp != NULL);
-
- mutex_lock(&lwp_register_list_lock);
- list_for_each_entry_safe(lri, tmp, &lwp_register_list, lri_list) {
- if (strcmp(exp->exp_obd->obd_name, lri->lri_name))
- continue;
- if (*lri->lri_exp != NULL)
- continue;
- *lri->lri_exp = class_export_get(exp);
- if (lri->lri_cb_func != NULL)
- lri->lri_cb_func(lri->lri_cb_data);
- }
- mutex_unlock(&lwp_register_list_lock);
-}
-
-static int lustre_lwp_connect(struct obd_device *lwp)
-{
- struct lu_env env;
- struct lu_context session_ctx;
- struct obd_export *exp;
- struct obd_uuid *uuid = NULL;
- struct obd_connect_data *data = NULL;
- int rc;
- ENTRY;
-
- /* log has been fully processed, let clients connect */
- rc = lu_env_init(&env, lwp->obd_lu_dev->ld_type->ldt_ctx_tags);
- if (rc != 0)
- RETURN(rc);
-
- lu_context_init(&session_ctx, LCT_SESSION);
- session_ctx.lc_thread = NULL;
- lu_context_enter(&session_ctx);
- env.le_ses = &session_ctx;
-
- OBD_ALLOC_PTR(data);
- if (data == NULL)
- GOTO(out, rc = -ENOMEM);
-
- data->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_INDEX;
- data->ocd_version = LUSTRE_VERSION_CODE;
- data->ocd_connect_flags |= OBD_CONNECT_MDS_MDS | OBD_CONNECT_FID |
- OBD_CONNECT_AT | OBD_CONNECT_LRU_RESIZE |
- OBD_CONNECT_FULL20 | OBD_CONNECT_LVB_TYPE |
- OBD_CONNECT_LIGHTWEIGHT;
- OBD_ALLOC_PTR(uuid);
- if (uuid == NULL)
- GOTO(out, rc = -ENOMEM);
-
- if (strlen(lwp->obd_name) > sizeof(uuid->uuid)) {
- CERROR("%s: Too long lwp name %s, max_size is %d\n",
- lwp->obd_name, lwp->obd_name, (int)sizeof(uuid->uuid));
- GOTO(out, rc = -EINVAL);
- }
-
- /* Use lwp name as the uuid, so we find the export by lwp name later */
- memcpy(uuid->uuid, lwp->obd_name, strlen(lwp->obd_name));
- rc = obd_connect(&env, &exp, lwp, uuid, data, NULL);
- if (rc != 0)
- CERROR("%s: connect failed: rc = %d\n", lwp->obd_name, rc);
- else
- lustre_notify_lwp_list(exp);
-
-out:
- if (data != NULL)
- OBD_FREE_PTR(data);
- if (uuid != NULL)
- OBD_FREE_PTR(uuid);
-
- lu_env_fini(&env);
- lu_context_exit(&session_ctx);
- lu_context_fini(&session_ctx);
-
- RETURN(rc);
-}
-
-/**
- * lwp is used by slaves (Non-MDT0 targets) to manage the connection
- * to MDT0.
- **/
-static int lustre_lwp_setup(struct lustre_cfg *lcfg, struct lustre_sb_info *lsi)
-{
- struct obd_connect_data *data = NULL;
- struct obd_device *obd;
- char *lwpname = NULL;
- char *lwpuuid = NULL;
- int rc;
- ENTRY;
-
- rc = class_add_uuid(lustre_cfg_string(lcfg, 1),
- lcfg->lcfg_nid);
- if (rc) {
- CERROR("%s: Can't add uuid: rc =%d\n", lsi->lsi_svname, rc);
- GOTO(out, rc);
- }
-
- OBD_ALLOC(lwpname, MTI_NAME_MAXLEN);
- if (lwpname == NULL)
- GOTO(out, rc = -ENOMEM);
-
- rc = tgt_name2lwpname(lsi->lsi_svname, lwpname);
- if (rc != 0) {
- CERROR("%s: failed to generate lwp name. %d\n",
- lsi->lsi_svname, rc);
- GOTO(out, rc);
- }
-
- OBD_ALLOC(lwpuuid, MTI_NAME_MAXLEN);
- if (lwpuuid == NULL)
- GOTO(out, rc = -ENOMEM);
-
- sprintf(lwpuuid, "%s_UUID", lwpname);
- rc = lustre_start_simple(lwpname, LUSTRE_LWP_NAME,
- lwpuuid, lustre_cfg_string(lcfg, 1),
- 0, 0, 0);
- if (rc) {
- CERROR("%s: setup up failed: rc %d\n", lwpname, rc);
- GOTO(out, rc);
- }
-
- obd = class_name2obd(lwpname);
- LASSERT(obd != NULL);
-
- rc = lustre_lwp_connect(obd);
- if (rc != 0)
- CERROR("%s: connect failed: rc = %d\n", lwpname, rc);
-out:
- if (data != NULL)
- OBD_FREE_PTR(data);
- if (lwpname != NULL)
- OBD_FREE(lwpname, MTI_NAME_MAXLEN);
- if (lwpuuid != NULL)
- OBD_FREE(lwpuuid, MTI_NAME_MAXLEN);
-
- RETURN(rc);
-}
-
-/* the caller is responsible for memory free */
-static struct obd_device *lustre_find_lwp(struct lustre_sb_info *lsi,
- char **lwpname, char **logname)
-{
- struct obd_device *lwp;
- int rc = 0;
- ENTRY;
-
- LASSERT(lwpname != NULL);
- LASSERT(IS_OST(lsi) || IS_MDT(lsi));
-
- OBD_ALLOC(*lwpname, MTI_NAME_MAXLEN);
- if (*lwpname == NULL)
- RETURN(ERR_PTR(-ENOMEM));
-
- if (logname != NULL) {
- OBD_ALLOC(*logname, MTI_NAME_MAXLEN);
- if (*logname == NULL)
- GOTO(out, rc = -ENOMEM);
- rc = server_name2fsname(lsi->lsi_svname, *lwpname, NULL);
- if (rc != 0) {
- CERROR("%s: failed to get fsname from svname. %d\n",
- lsi->lsi_svname, rc);
- GOTO(out, rc = -EINVAL);
- }
- sprintf(*logname, "%s-client", *lwpname);
- }
-
- rc = tgt_name2lwpname(lsi->lsi_svname, *lwpname);
- if (rc != 0) {
- CERROR("%s: failed to generate lwp name. %d\n",
- lsi->lsi_svname, rc);
- GOTO(out, rc = -EINVAL);
- }
-
- lwp = class_name2obd(*lwpname);
-
-out:
- if (rc != 0) {
- if (*lwpname != NULL) {
- OBD_FREE(*lwpname, MTI_NAME_MAXLEN);
- *lwpname = NULL;
- }
- if (logname != NULL && *logname != NULL) {
- OBD_FREE(*logname, MTI_NAME_MAXLEN);
- *logname = NULL;
- }
- lwp = ERR_PTR(rc);
- }
-
- RETURN(lwp != NULL ? lwp : ERR_PTR(-ENOENT));
-}
-
-static int lustre_lwp_add_conn(struct lustre_cfg *cfg,
- struct lustre_sb_info *lsi)
-{
- struct lustre_cfg_bufs *bufs = NULL;
- struct lustre_cfg *lcfg = NULL;
- char *lwpname = NULL;
- struct obd_device *lwp;
- int rc;
- ENTRY;
-
- lwp = lustre_find_lwp(lsi, &lwpname, NULL);
- if (IS_ERR(lwp)) {
- CERROR("%s: can't find lwp device.\n", lsi->lsi_svname);
- GOTO(out, rc = PTR_ERR(lwp));
- }
- LASSERT(lwpname != NULL);
-
- OBD_ALLOC_PTR(bufs);
- if (bufs == NULL)
- GOTO(out, rc = -ENOMEM);
-
- lustre_cfg_bufs_reset(bufs, lwpname);
- lustre_cfg_bufs_set_string(bufs, 1,
- lustre_cfg_string(cfg, 1));
-
- lcfg = lustre_cfg_new(LCFG_ADD_CONN, bufs);
-
- rc = class_add_conn(lwp, lcfg);
- if (rc)
- CERROR("%s: can't add conn: rc = %d\n", lwpname, rc);
-
-out:
- if (bufs != NULL)
- OBD_FREE_PTR(bufs);
- if (lcfg != NULL)
- lustre_cfg_free(lcfg);
- if (lwpname != NULL)
- OBD_FREE(lwpname, MTI_NAME_MAXLEN);
- RETURN(rc);
-}
-
-/**
- * Retrieve MDT nids from the client log, then start the lwp device.
- * there are only two scenarios which would include mdt nid.
- * 1.
- * marker 5 (flags=0x01, v2.1.54.0) lustre-MDT0000 'add mdc' xxx-
- * add_uuid nid=192.168.122.162@tcp(0x20000c0a87aa2) 0: 1:192.168.122.162@tcp
- * attach 0:lustre-MDT0000-mdc 1:mdc 2:lustre-clilmv_UUID
- * setup 0:lustre-MDT0000-mdc 1:lustre-MDT0000_UUID 2:192.168.122.162@tcp
- * add_uuid nid=192.168.172.1@tcp(0x20000c0a8ac01) 0: 1:192.168.172.1@tcp
- * add_conn 0:lustre-MDT0000-mdc 1:192.168.172.1@tcp
- * modify_mdc_tgts add 0:lustre-clilmv 1:lustre-MDT0000_UUID xxxx
- * marker 5 (flags=0x02, v2.1.54.0) lustre-MDT0000 'add mdc' xxxx-
- * 2.
- * marker 7 (flags=0x01, v2.1.54.0) lustre-MDT0000 'add failnid' xxxx-
- * add_uuid nid=192.168.122.2@tcp(0x20000c0a87a02) 0: 1:192.168.122.2@tcp
- * add_conn 0:lustre-MDT0000-mdc 1:192.168.122.2@tcp
- * marker 7 (flags=0x02, v2.1.54.0) lustre-MDT0000 'add failnid' xxxx-
- **/
-static int client_lwp_config_process(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);
- struct lustre_cfg *lcfg = NULL;
- struct lustre_sb_info *lsi;
- int rc = 0, swab = 0;
- ENTRY;
-
- if (rec->lrh_type != OBD_CFG_REC) {
- CERROR("Unknown llog record type %#x encountered\n",
- rec->lrh_type);
- RETURN(-EINVAL);
- }
-
- LASSERT(clli->cfg_sb != NULL);
- lsi = s2lsi(clli->cfg_sb);
-
- 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);
-
- switch (lcfg->lcfg_command) {
- case LCFG_MARKER: {
- struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
-
- lustre_swab_cfg_marker(marker, swab,
- LUSTRE_CFG_BUFLEN(lcfg, 1));
- if (marker->cm_flags & CM_SKIP ||
- marker->cm_flags & CM_EXCLUDE)
- GOTO(out, rc = 0);
-
- if (!tgt_is_mdt0(marker->cm_tgtname))
- GOTO(out, rc = 0);
-
- if (!strncmp(marker->cm_comment, "add mdc", 7) ||
- !strncmp(marker->cm_comment, "add failnid", 11)) {
- if (marker->cm_flags & CM_START) {
- clli->cfg_flags = CFG_F_MARKER;
- /* This hack is to differentiate the
- * ADD_UUID is come from "add mdc" record
- * or from "add failnid" record. */
- if (!strncmp(marker->cm_comment,
- "add failnid", 11))
- clli->cfg_flags |= CFG_F_SKIP;
- } else if (marker->cm_flags & CM_END) {
- clli->cfg_flags = 0;
- }
- }
- break;
- }
- case LCFG_ADD_UUID: {
- if (clli->cfg_flags == CFG_F_MARKER) {
- rc = lustre_lwp_setup(lcfg, lsi);
- /* XXX: process only the first nid as
- * we don't need another instance of lwp */
- clli->cfg_flags |= CFG_F_SKIP;
- } else if (clli->cfg_flags == (CFG_F_MARKER | CFG_F_SKIP)) {
- rc = class_add_uuid(lustre_cfg_string(lcfg, 1),
- lcfg->lcfg_nid);
- if (rc)
- CERROR("%s: Fail to add uuid, rc:%d\n",
- lsi->lsi_svname, rc);
- }
- break;
- }
- case LCFG_ADD_CONN: {
- if (is_mdc_for_mdt0(lustre_cfg_string(lcfg, 0)))
- rc = lustre_lwp_add_conn(lcfg, lsi);
- break;
- }
- default:
- break;
- }
-out:
- RETURN(rc);
-}
-
-static int lustre_disconnect_lwp(struct super_block *sb)
-{
- struct lustre_sb_info *lsi = s2lsi(sb);
- struct obd_device *lwp;
- char *lwpname = NULL;
- char *logname = NULL;
- struct lustre_cfg *lcfg = NULL;
- struct lustre_cfg_bufs *bufs = NULL;
- struct config_llog_instance *cfg = NULL;
- int rc;
- ENTRY;
-
- lwp = lustre_find_lwp(lsi, &lwpname, &logname);
- if (IS_ERR(lwp) && PTR_ERR(lwp) != -ENOENT)
- GOTO(out, rc = PTR_ERR(lwp));
-
- LASSERT(lwpname != NULL);
- LASSERT(logname != NULL);
-
- OBD_ALLOC_PTR(cfg);
- if (cfg == NULL)
- GOTO(out, rc = -ENOMEM);
-
- /* end log first */
- cfg->cfg_instance = sb;
- rc = lustre_end_log(sb, logname, cfg);
- if (rc != 0) {
- CERROR("%s: Can't end config log %s.\n", lwpname, logname);
- GOTO(out, rc);
- }
-
- if (PTR_ERR(lwp) == -ENOENT) {
- CDEBUG(D_CONFIG, "%s: lwp device wasn't started.\n",
- lsi->lsi_svname);
- GOTO(out, rc = 0);
- }
-
- OBD_ALLOC_PTR(bufs);
- if (bufs == NULL)
- GOTO(out, rc = -ENOMEM);
-
- lustre_cfg_bufs_reset(bufs, lwp->obd_name);
- lustre_cfg_bufs_set_string(bufs, 1, NULL);
- lcfg = lustre_cfg_new(LCFG_CLEANUP, bufs);
- if (!lcfg)
- GOTO(out, rc = -ENOMEM);
-
- /* Disconnect import first. NULL is passed for the '@env', since
- * it will not be used. */
- rc = lwp->obd_lu_dev->ld_ops->ldo_process_config(NULL, lwp->obd_lu_dev,
- lcfg);
-out:
- if (lcfg)
- lustre_cfg_free(lcfg);
- if (bufs)
- OBD_FREE_PTR(bufs);
- if (cfg)
- OBD_FREE_PTR(cfg);
- if (lwpname)
- OBD_FREE(lwpname, MTI_NAME_MAXLEN);
- if (logname)
- OBD_FREE(logname, MTI_NAME_MAXLEN);
- RETURN(rc);
-}
-
-/**
- * Stop the lwp for an OST/MDT target.
- **/
-static int lustre_stop_lwp(struct super_block *sb)
-{
- struct lustre_sb_info *lsi = s2lsi(sb);
- struct obd_device *lwp = NULL;
- char *lwpname = NULL;
- int rc = 0;
- ENTRY;
-
- lwp = lustre_find_lwp(lsi, &lwpname, NULL);
- if (IS_ERR(lwp)) {
- CDEBUG(PTR_ERR(lwp) == -ENOENT ? D_CONFIG : D_ERROR,
- "%s: lwp wasn't started.\n", lsi->lsi_svname);
- GOTO(out, rc = 0);
- }
-
- lwp->obd_force = 1;
- rc = class_manual_cleanup(lwp);
-
-out:
- if (lwpname != NULL)
- OBD_FREE(lwpname, MTI_NAME_MAXLEN);
- RETURN(rc);
-}
-
-/**
- * Start the lwp(fsname-MDT0000-lwp-OSTxxxx) for an OST or MDT target,
- * which would be used to establish connection from OST to MDT0.
- **/
-static int lustre_start_lwp(struct super_block *sb)
-{
- struct lustre_sb_info *lsi = s2lsi(sb);
- struct config_llog_instance *cfg = NULL;
- struct obd_device *lwp;
- char *lwpname = NULL;
- char *logname = NULL;
- int rc;
- ENTRY;
-
- lwp = lustre_find_lwp(lsi, &lwpname, &logname);
-
- /* the lwp device already stared */
- if (lwp && !IS_ERR(lwp))
- GOTO(out, rc = 0);
-
- if (PTR_ERR(lwp) != -ENOENT)
- GOTO(out, rc = PTR_ERR(lwp));
-
- LASSERT(lwpname != NULL);
- LASSERT(logname != NULL);
-
- OBD_ALLOC_PTR(cfg);
- if (cfg == NULL)
- GOTO(out, rc = -ENOMEM);
-
- cfg->cfg_callback = client_lwp_config_process;
- cfg->cfg_instance = sb;
-
- rc = lustre_process_log(sb, logname, cfg);
-out:
- if (lwpname != NULL)
- OBD_FREE(lwpname, MTI_NAME_MAXLEN);
- if (logname != NULL)
- OBD_FREE(logname, MTI_NAME_MAXLEN);
- if (cfg != NULL)
- OBD_FREE_PTR(cfg);
- RETURN(rc);
-}
-
-DEFINE_MUTEX(server_start_lock);
-
-/* Stop MDS/OSS if nobody is using them */
-static int server_stop_servers(int lsiflags)
-{
- struct obd_device *obd = NULL;
- struct obd_type *type = NULL;
- int rc = 0;
- ENTRY;
-
- mutex_lock(&server_start_lock);
-
- /* Either an MDT or an OST or neither */
- /* if this was an MDT, and there are no more MDT's, clean up the MDS */
- if (lsiflags & LDD_F_SV_TYPE_MDT) {
- obd = class_name2obd(LUSTRE_MDS_OBDNAME);
- if (obd != NULL)
- type = class_search_type(LUSTRE_MDT_NAME);
- }
-
- /* if this was an OST, and there are no more OST's, clean up the OSS */
- if (lsiflags & LDD_F_SV_TYPE_OST) {
- obd = class_name2obd(LUSTRE_OSS_OBDNAME);
- if (obd != NULL)
- type = class_search_type(LUSTRE_OST_NAME);
- }
-
- if (obd != NULL && (type == NULL || type->typ_refcnt == 0)) {
- int err;
-
- obd->obd_force = 1;
- /* obd_fail doesn't mean much on a server obd */
- err = class_manual_cleanup(obd);
- if (rc != 0)
- rc = err;
- }
-
- mutex_unlock(&server_start_lock);
-
- RETURN(rc);
-}
-
-int server_mti_print(const char *title, struct mgs_target_info *mti)
-{
- PRINT_CMD(PRINT_MASK, "mti %s\n", title);
- PRINT_CMD(PRINT_MASK, "server: %s\n", mti->mti_svname);
- PRINT_CMD(PRINT_MASK, "fs: %s\n", mti->mti_fsname);
- PRINT_CMD(PRINT_MASK, "uuid: %s\n", mti->mti_uuid);
- PRINT_CMD(PRINT_MASK, "ver: %d flags: %#x\n",
- mti->mti_config_ver, mti->mti_flags);
- return 0;
-}
-EXPORT_SYMBOL(server_mti_print);
-
-/* Generate data for registration */
-static int server_lsi2mti(struct lustre_sb_info *lsi,
- struct mgs_target_info *mti)
-{
- lnet_process_id_t id;
- int rc, i = 0;
- int cplen = 0;
- ENTRY;
-
- if (!IS_SERVER(lsi))
- RETURN(-EINVAL);
-
- if (strlcpy(mti->mti_svname, lsi->lsi_svname, sizeof(mti->mti_svname))
- >= sizeof(mti->mti_svname))
- RETURN(-E2BIG);
-
- mti->mti_nid_count = 0;
- while (LNetGetId(i++, &id) != -ENOENT) {
- if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
- continue;
-
- /* server use --servicenode param, only allow specified
- * nids be registered */
- if ((lsi->lsi_lmd->lmd_flags & LMD_FLG_NO_PRIMNODE) != 0 &&
- class_match_nid(lsi->lsi_lmd->lmd_params,
- PARAM_FAILNODE, id.nid) < 1)
- continue;
-
- /* match specified network */
- if (!class_match_net(lsi->lsi_lmd->lmd_params,
- PARAM_NETWORK, LNET_NIDNET(id.nid)))
- continue;
-
- mti->mti_nids[mti->mti_nid_count] = id.nid;
- mti->mti_nid_count++;
- if (mti->mti_nid_count >= MTI_NIDS_MAX) {
- CWARN("Only using first %d nids for %s\n",
- mti->mti_nid_count, mti->mti_svname);
- break;
- }
- }
-
- mti->mti_lustre_ver = LUSTRE_VERSION_CODE;
- mti->mti_config_ver = 0;
-
- rc = server_name2fsname(lsi->lsi_svname, mti->mti_fsname, NULL);
- if (rc != 0)
- return rc;
-
- rc = server_name2index(lsi->lsi_svname, &mti->mti_stripe_index, NULL);
- if (rc < 0)
- return rc;
- /* Orion requires index to be set */
- LASSERT(!(rc & LDD_F_NEED_INDEX));
- /* keep only LDD flags */
- mti->mti_flags = lsi->lsi_flags & LDD_F_MASK;
- if (mti->mti_flags & (LDD_F_WRITECONF | LDD_F_VIRGIN))
- mti->mti_flags |= LDD_F_UPDATE;
- cplen = strlcpy(mti->mti_params, lsi->lsi_lmd->lmd_params,
- sizeof(mti->mti_params));
- if (cplen >= sizeof(mti->mti_params))
- return -E2BIG;
- return 0;
-}
-
-/* Register an old or new target with the MGS. If needed MGS will construct
- startup logs and assign index */
-static int server_register_target(struct lustre_sb_info *lsi)
-{
- struct obd_device *mgc = lsi->lsi_mgc;
- struct mgs_target_info *mti = NULL;
- bool writeconf;
- int rc;
- ENTRY;
-
- LASSERT(mgc);
-
- if (!IS_SERVER(lsi))
- RETURN(-EINVAL);
-
- OBD_ALLOC_PTR(mti);
- if (!mti)
- RETURN(-ENOMEM);
-
- rc = server_lsi2mti(lsi, mti);
- if (rc)
- GOTO(out, rc);
-
- CDEBUG(D_MOUNT, "Registration %s, fs=%s, %s, index=%04x, flags=%#x\n",
- mti->mti_svname, mti->mti_fsname,
- libcfs_nid2str(mti->mti_nids[0]), mti->mti_stripe_index,
- mti->mti_flags);
-
- /* if write_conf is true, the registration must succeed */
- writeconf = !!(lsi->lsi_flags & (LDD_F_NEED_INDEX | LDD_F_UPDATE));
- mti->mti_flags |= LDD_F_OPC_REG;
-
- /* Register the target */
- /* FIXME use mgc_process_config instead */
- rc = obd_set_info_async(NULL, mgc->u.cli.cl_mgc_mgsexp,
- sizeof(KEY_REGISTER_TARGET),
- KEY_REGISTER_TARGET,
- sizeof(*mti), mti, NULL);
- if (rc) {
- if (mti->mti_flags & LDD_F_ERROR) {
- LCONSOLE_ERROR_MSG(0x160,
- "%s: the MGS refuses to allow this server "
- "to start: rc = %d. Please see messages on "
- "the MGS.\n", lsi->lsi_svname, rc);
- } else if (writeconf) {
- LCONSOLE_ERROR_MSG(0x15f,
- "%s: cannot register this server with the MGS: "
- "rc = %d. Is the MGS running?\n",
- lsi->lsi_svname, rc);
- } else {
- CERROR("%s: error registering with the MGS: rc = %d "
- "(not fatal)\n", lsi->lsi_svname, rc);
- /* reset the error code for non-fatal error. */
- rc = 0;
- }
- GOTO(out, rc);
- }
-
-out:
- if (mti)
- OBD_FREE_PTR(mti);
- RETURN(rc);
-}
-
-/**
- * Notify the MGS that this target is ready.
- * Used by IR - if the MGS receives this message, it will notify clients.
- */
-static int server_notify_target(struct super_block *sb, struct obd_device *obd)
-{
- struct lustre_sb_info *lsi = s2lsi(sb);
- struct obd_device *mgc = lsi->lsi_mgc;
- struct mgs_target_info *mti = NULL;
- int rc;
- ENTRY;
-
- LASSERT(mgc);
-
- if (!(IS_SERVER(lsi)))
- RETURN(-EINVAL);
-
- OBD_ALLOC_PTR(mti);
- if (!mti)
- RETURN(-ENOMEM);
- rc = server_lsi2mti(lsi, mti);
- if (rc)
- GOTO(out, rc);
-
- mti->mti_instance = obd->u.obt.obt_instance;
- mti->mti_flags |= LDD_F_OPC_READY;
-
- /* FIXME use mgc_process_config instead */
- rc = obd_set_info_async(NULL, mgc->u.cli.cl_mgc_mgsexp,
- sizeof(KEY_REGISTER_TARGET),
- KEY_REGISTER_TARGET,
- sizeof(*mti), mti, NULL);
-
- /* Imperative recovery: if the mgs informs us to use IR? */
- if (!rc && !(mti->mti_flags & LDD_F_ERROR) &&
- (mti->mti_flags & LDD_F_IR_CAPABLE))
- lsi->lsi_flags |= LDD_F_IR_CAPABLE;
-
-out:
- if (mti)
- OBD_FREE_PTR(mti);
- RETURN(rc);
-
-}
-
-/** Start server targets: MDTs and OSTs
- */
-static int server_start_targets(struct super_block *sb, struct vfsmount *mnt)
-{
- struct obd_device *obd;
- struct lustre_sb_info *lsi = s2lsi(sb);
- struct config_llog_instance cfg;
- struct lu_env env;
- struct lu_device *dev;
- int rc;
- ENTRY;
-
- CDEBUG(D_MOUNT, "starting target %s\n", lsi->lsi_svname);
-
- if (IS_MDT(lsi)) {
- /* make sure the MDS is started */
- mutex_lock(&server_start_lock);
- obd = class_name2obd(LUSTRE_MDS_OBDNAME);
- if (!obd) {
- rc = lustre_start_simple(LUSTRE_MDS_OBDNAME,
- LUSTRE_MDS_NAME,
- LUSTRE_MDS_OBDNAME"_uuid",
- 0, 0, 0, 0);
- if (rc) {
- mutex_unlock(&server_start_lock);
- CERROR("failed to start MDS: %d\n", rc);
- RETURN(rc);
- }
- }
- mutex_unlock(&server_start_lock);
- }
-
- /* If we're an OST, make sure the global OSS is running */
- if (IS_OST(lsi)) {
- /* make sure OSS is started */
- mutex_lock(&server_start_lock);
- obd = class_name2obd(LUSTRE_OSS_OBDNAME);
- if (!obd) {
- rc = lustre_start_simple(LUSTRE_OSS_OBDNAME,
- LUSTRE_OSS_NAME,
- LUSTRE_OSS_OBDNAME"_uuid",
- 0, 0, 0, 0);
- if (rc) {
- mutex_unlock(&server_start_lock);
- CERROR("failed to start OSS: %d\n", rc);
- RETURN(rc);
- }
- }
- mutex_unlock(&server_start_lock);
- }
-
- /* Set the mgc fs to our server disk. This allows the MGC to
- * read and write configs locally, in case it can't talk to the MGS. */
- if (lsi->lsi_srv_mnt) {
- rc = server_mgc_set_fs(lsi->lsi_mgc, sb);
- if (rc)
- GOTO(out_stop_service, rc);
- }
-
- /* Register with MGS */
- rc = server_register_target(lsi);
- if (rc)
- GOTO(out_mgc, rc);
-
- /* Let the target look up the mount using the target's name
- (we can't pass the sb or mnt through class_process_config.) */
- rc = server_register_mount(lsi->lsi_svname, sb, mnt);
- if (rc)
- GOTO(out_mgc, rc);
-
- /* Start targets using the llog named for the target */
- memset(&cfg, 0, sizeof(cfg));
- cfg.cfg_callback = class_config_llog_handler;
- rc = lustre_process_log(sb, lsi->lsi_svname, &cfg);
- if (rc) {
- CERROR("failed to start server %s: %d\n",
- lsi->lsi_svname, rc);
- /* Do NOT call server_deregister_mount() here. This makes it
- * impossible to find mount later in cleanup time and leaves
- * @lsi and othder stuff leaked. -umka */
- GOTO(out_mgc, rc);
- }
-
- obd = class_name2obd(lsi->lsi_svname);
- if (!obd) {
- CERROR("no server named %s was started\n", lsi->lsi_svname);
- GOTO(out_mgc, rc = -ENXIO);
- }
-
- if (IS_OST(lsi) || IS_MDT(lsi)) {
- rc = lustre_start_lwp(sb);
- if (rc) {
- CERROR("%s: failed to start LWP: %d\n",
- lsi->lsi_svname, rc);
- GOTO(out_mgc, rc);
- }
- }
-
- server_notify_target(sb, obd);
-
- /* calculate recovery timeout, do it after lustre_process_log */
- server_calc_timeout(lsi, obd);
-
- /* log has been fully processed */
- obd_notify(obd, NULL, OBD_NOTIFY_CONFIG, (void *)CONFIG_LOG);
-
- /* log has been fully processed, let clients connect */
- dev = obd->obd_lu_dev;
- if (dev && dev->ld_ops->ldo_prepare) {
- rc = lu_env_init(&env, dev->ld_type->ldt_ctx_tags);
- if (rc == 0) {
- struct lu_context session_ctx;
-
- lu_context_init(&session_ctx, LCT_SESSION);
- session_ctx.lc_thread = NULL;
- lu_context_enter(&session_ctx);
- env.le_ses = &session_ctx;
-
- rc = dev->ld_ops->ldo_prepare(&env, NULL, dev);
-
- lu_env_fini(&env);
- lu_context_exit(&session_ctx);
- lu_context_fini(&session_ctx);
- }
- }
-
- /* abort recovery only on the complete stack:
- * many devices can be involved */
- if ((lsi->lsi_lmd->lmd_flags & LMD_FLG_ABORT_RECOV) &&
- (OBP(obd, iocontrol))) {
- obd_iocontrol(OBD_IOC_ABORT_RECOVERY, obd->obd_self_export, 0,
- NULL, NULL);
- }
-
-out_mgc:
- /* Release the mgc fs for others to use */
- if (lsi->lsi_srv_mnt)
- server_mgc_clear_fs(lsi->lsi_mgc);
-
-out_stop_service:
- if (rc != 0)
- server_stop_servers(lsi->lsi_flags);
-
- RETURN(rc);
-}
-
-static int lsi_prepare(struct lustre_sb_info *lsi)
-{
- __u32 index;
- int rc;
- ENTRY;
-
- LASSERT(lsi);
- LASSERT(lsi->lsi_lmd);
-
- /* The server name is given as a mount line option */
- if (lsi->lsi_lmd->lmd_profile == NULL) {
- LCONSOLE_ERROR("Can't determine server name\n");
- RETURN(-EINVAL);
- }
-
- if (strlen(lsi->lsi_lmd->lmd_profile) >= sizeof(lsi->lsi_svname))
- RETURN(-ENAMETOOLONG);
-
- strcpy(lsi->lsi_svname, lsi->lsi_lmd->lmd_profile);
-
- /* Determine osd type */
- if (lsi->lsi_lmd->lmd_osd_type != NULL) {
- if (strlen(lsi->lsi_lmd->lmd_osd_type) >=
- sizeof(lsi->lsi_osd_type))
- RETURN(-ENAMETOOLONG);
-
- strcpy(lsi->lsi_osd_type, lsi->lsi_lmd->lmd_osd_type);
- } else {
- strcpy(lsi->lsi_osd_type, LUSTRE_OSD_LDISKFS_NAME);
- }
-
- /* XXX: a temp. solution for components using fsfilt
- * to be removed in one of the subsequent patches */
- if (!strcmp(lsi->lsi_lmd->lmd_osd_type, "osd-ldiskfs"))
- strcpy(lsi->lsi_fstype, "ldiskfs");
- else
- strcpy(lsi->lsi_fstype, lsi->lsi_lmd->lmd_osd_type);
-
- /* Determine server type */
- rc = server_name2index(lsi->lsi_svname, &index, NULL);
- if (rc < 0) {
- if (lsi->lsi_lmd->lmd_flags & LMD_FLG_MGS) {
- /* Assume we're a bare MGS */
- rc = 0;
- lsi->lsi_lmd->lmd_flags |= LMD_FLG_NOSVC;
- } else {
- LCONSOLE_ERROR("Can't determine server type of '%s'\n",
- lsi->lsi_svname);
- RETURN(rc);
- }
- }
- lsi->lsi_flags |= rc;
-
- /* Add mount line flags that used to be in ldd:
- * writeconf, mgs, anything else?
- */
- lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_WRITECONF) ?
- LDD_F_WRITECONF : 0;
- lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_VIRGIN) ?
- LDD_F_VIRGIN : 0;
- lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_UPDATE) ?
- LDD_F_UPDATE : 0;
- lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_MGS) ?
- LDD_F_SV_TYPE_MGS : 0;
- lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_NO_PRIMNODE) ?
- LDD_F_NO_PRIMNODE : 0;
-
- RETURN(0);
-}
-
-/*************** server mount ******************/
-
-/** Start the shutdown of servers at umount.
- */
-static void server_put_super(struct super_block *sb)
-{
- struct lustre_sb_info *lsi = s2lsi(sb);
- struct obd_device *obd;
- char *tmpname, *extraname = NULL;
- int tmpname_sz;
- int lsiflags = lsi->lsi_flags;
- ENTRY;
-
- LASSERT(IS_SERVER(lsi));
-
- tmpname_sz = strlen(lsi->lsi_svname) + 1;
- OBD_ALLOC(tmpname, tmpname_sz);
- memcpy(tmpname, lsi->lsi_svname, tmpname_sz);
- CDEBUG(D_MOUNT, "server put_super %s\n", tmpname);
- if (IS_MDT(lsi) && (lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC))
- snprintf(tmpname, tmpname_sz, "MGS");
-
- /* disconnect the lwp first to drain off the inflight request */
- if (IS_OST(lsi) || IS_MDT(lsi)) {
- int rc;
-
- rc = lustre_disconnect_lwp(sb);
- if (rc && rc != ETIMEDOUT)
- CERROR("%s: failed to disconnect lwp. (rc=%d)\n",
- tmpname, rc);
- }
-
- /* Stop the target */
- if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC) &&
- (IS_MDT(lsi) || IS_OST(lsi))) {
- struct lustre_profile *lprof = NULL;
-
- /* tell the mgc to drop the config log */
- lustre_end_log(sb, lsi->lsi_svname, NULL);
-
- /* COMPAT_146 - profile may get deleted in mgc_cleanup.
- If there are any setup/cleanup errors, save the lov
- name for safety cleanup later. */
- lprof = class_get_profile(lsi->lsi_svname);
- if (lprof && lprof->lp_dt) {
- OBD_ALLOC(extraname, strlen(lprof->lp_dt) + 1);
- strcpy(extraname, lprof->lp_dt);
- }
-
- obd = class_name2obd(lsi->lsi_svname);
- if (obd) {
- CDEBUG(D_MOUNT, "stopping %s\n", obd->obd_name);
- if (lsiflags & LSI_UMOUNT_FAILOVER)
- obd->obd_fail = 1;
- /* We can't seem to give an error return code
- * to .put_super, so we better make sure we clean up! */
- obd->obd_force = 1;
- class_manual_cleanup(obd);
- } else {
- CERROR("no obd %s\n", lsi->lsi_svname);
- server_deregister_mount(lsi->lsi_svname);
- }
- }
-
- /* If they wanted the mgs to stop separately from the mdt, they
- should have put it on a different device. */
- if (IS_MGS(lsi)) {
- /* if MDS start with --nomgs, don't stop MGS then */
- if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOMGS))
- server_stop_mgs(sb);
- }
-
- if (IS_OST(lsi) || IS_MDT(lsi)) {
- if (lustre_stop_lwp(sb) < 0)
- CERROR("%s: failed to stop lwp!\n", tmpname);
- }
-
- /* Clean the mgc and sb */
- lustre_common_put_super(sb);
-
- /* wait till all in-progress cleanups are done
- * specifically we're interested in ofd cleanup
- * as it pins OSS */
- obd_zombie_barrier();
-
- /* Stop the servers (MDS, OSS) if no longer needed. We must wait
- until the target is really gone so that our type refcount check
- is right. */
- server_stop_servers(lsiflags);
-
- /* In case of startup or cleanup err, stop related obds */
- if (extraname) {
- obd = class_name2obd(extraname);
- if (obd) {
- CWARN("Cleaning orphaned obd %s\n", extraname);
- obd->obd_force = 1;
- class_manual_cleanup(obd);
- }
- OBD_FREE(extraname, strlen(extraname) + 1);
- }
-
- LCONSOLE_WARN("server umount %s complete\n", tmpname);
- OBD_FREE(tmpname, tmpname_sz);
- EXIT;
-}
-
-/** Called only for 'umount -f'
- */
-static void server_umount_begin(struct super_block *sb)
-{
- struct lustre_sb_info *lsi = s2lsi(sb);
- ENTRY;
-
- CDEBUG(D_MOUNT, "umount -f\n");
- /* umount = failover
- umount -f = force
- no third way to do non-force, non-failover */
- lsi->lsi_flags &= ~LSI_UMOUNT_FAILOVER;
- EXIT;
-}
-
-static int server_statfs(struct dentry *dentry, struct kstatfs *buf)
-{
- struct super_block *sb = dentry->d_sb;
- struct lustre_sb_info *lsi = s2lsi(sb);
- struct obd_statfs statfs;
- int rc;
- ENTRY;
-
- if (lsi->lsi_dt_dev) {
- rc = dt_statfs(NULL, lsi->lsi_dt_dev, &statfs);
- if (rc == 0) {
- statfs_unpack(buf, &statfs);
- buf->f_type = sb->s_magic;
- RETURN(0);
- }
- }
-
- /* just return 0 */
- buf->f_type = sb->s_magic;
- buf->f_bsize = sb->s_blocksize;
- buf->f_blocks = 1;
- buf->f_bfree = 0;
- buf->f_bavail = 0;
- buf->f_files = 1;
- buf->f_ffree = 0;
- buf->f_namelen = NAME_MAX;
- RETURN(0);
-}
-
-/** The operations we support directly on the superblock:
- * mount, umount, and df.
- */
-static struct super_operations server_ops = {
- .put_super = server_put_super,
- .umount_begin = server_umount_begin, /* umount -f */
- .statfs = server_statfs,
-};
-
-#define log2(n) ffz(~(n))
-#define LUSTRE_SUPER_MAGIC 0x0BD00BD1
-
-static int server_fill_super_common(struct super_block *sb)
-{
- struct inode *root = 0;
- ENTRY;
-
- CDEBUG(D_MOUNT, "Server sb, dev=%d\n", (int)sb->s_dev);
-
- sb->s_blocksize = 4096;
- sb->s_blocksize_bits = log2(sb->s_blocksize);
- sb->s_magic = LUSTRE_SUPER_MAGIC;
- sb->s_maxbytes = 0; /* we don't allow file IO on server mountpoints */
- sb->s_flags |= MS_RDONLY;
- sb->s_op = &server_ops;
-
- root = new_inode(sb);
- if (!root) {
- CERROR("Can't make root inode\n");
- RETURN(-EIO);
- }
-
- /* returns -EIO for every operation */
- /* make_bad_inode(root); -- badness - can't umount */
- /* apparently we need to be a directory for the mount to finish */
- root->i_mode = S_IFDIR;
-
- sb->s_root = d_make_root(root);
- if (!sb->s_root) {
- CERROR("%s: can't make root dentry\n", sb->s_id);
- RETURN(-EIO);
- }
-
- RETURN(0);
-}
-
-static int osd_start(struct lustre_sb_info *lsi, unsigned long mflags)
-{
- struct lustre_mount_data *lmd = lsi->lsi_lmd;
- struct obd_device *obd;
- struct dt_device_param p;
- char flagstr[16];
- int rc;
- ENTRY;
-
- CDEBUG(D_MOUNT,
- "Attempting to start %s, type=%s, lsifl=%x, mountfl=%lx\n",
- lsi->lsi_svname, lsi->lsi_osd_type, lsi->lsi_flags, mflags);
-
- sprintf(lsi->lsi_osd_obdname, "%s-osd", lsi->lsi_svname);
- strcpy(lsi->lsi_osd_uuid, lsi->lsi_osd_obdname);
- strcat(lsi->lsi_osd_uuid, "_UUID");
- sprintf(flagstr, "%lu:%lu", mflags, (unsigned long) lmd->lmd_flags);
-
- obd = class_name2obd(lsi->lsi_osd_obdname);
- if (obd == NULL) {
- rc = lustre_start_simple(lsi->lsi_osd_obdname,
- lsi->lsi_osd_type,
- lsi->lsi_osd_uuid, lmd->lmd_dev,
- flagstr, lsi->lsi_lmd->lmd_opts,
- lsi->lsi_svname);
- if (rc)
- GOTO(out, rc);
- obd = class_name2obd(lsi->lsi_osd_obdname);
- LASSERT(obd);
- }
-
- rc = obd_connect(NULL, &lsi->lsi_osd_exp,
- obd, &obd->obd_uuid, NULL, NULL);
- if (rc) {
- obd->obd_force = 1;
- class_manual_cleanup(obd);
- lsi->lsi_dt_dev = NULL;
- }
-
- /* XXX: to keep support old components relying on lsi_srv_mnt
- * we get this info from OSD just started */
- LASSERT(obd->obd_lu_dev);
- lsi->lsi_dt_dev = lu2dt_dev(obd->obd_lu_dev);
- LASSERT(lsi->lsi_dt_dev);
-
- dt_conf_get(NULL, lsi->lsi_dt_dev, &p);
-
- lsi->lsi_srv_mnt = p.ddp_mnt;
-
-out:
- RETURN(rc);
-}
-
-/** Fill in the superblock info for a Lustre server.
- * Mount the device with the correct options.
- * Read the on-disk config file.
- * Start the services.
- */
-int server_fill_super(struct super_block *sb)
-{
- struct lustre_sb_info *lsi = s2lsi(sb);
- int rc;
- ENTRY;
-
- rc = lsi_prepare(lsi);
- if (rc)
- RETURN(rc);
-
- /* Start low level OSD */
- rc = osd_start(lsi, sb->s_flags);
- if (rc) {
- CERROR("Unable to start osd on %s: %d\n",
- lsi->lsi_lmd->lmd_dev, rc);
- lustre_put_lsi(sb);
- RETURN(rc);
- }
-
- CDEBUG(D_MOUNT, "Found service %s on device %s\n",
- lsi->lsi_svname, lsi->lsi_lmd->lmd_dev);
-
- if (class_name2obd(lsi->lsi_svname)) {
- LCONSOLE_ERROR_MSG(0x161, "The target named %s is already "
- "running. Double-mount may have compromised"
- " the disk journal.\n",
- lsi->lsi_svname);
- lustre_put_lsi(sb);
- RETURN(-EALREADY);
- }
-
- /* Start MGS before MGC */
- if (IS_MGS(lsi) && !(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOMGS)) {
- rc = server_start_mgs(sb);
- if (rc)
- GOTO(out_mnt, rc);
- }
-
- /* Start MGC before servers */
- rc = lustre_start_mgc(sb);
- if (rc)
- GOTO(out_mnt, rc);
-
- /* Set up all obd devices for service */
- if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC) &&
- (IS_OST(lsi) || IS_MDT(lsi))) {
- rc = server_start_targets(sb, lsi->lsi_srv_mnt);
- if (rc < 0) {
- CERROR("Unable to start targets: %d\n", rc);
- GOTO(out_mnt, rc);
- }
- /* FIXME overmount client here, or can we just start a
- * client log and client_fill_super on this sb? We
- * need to make sure server_put_super gets called too
- * - ll_put_super calls lustre_common_put_super; check
- * there for LSI_SERVER flag, call s_p_s if so.
- *
- * Probably should start client from new thread so we
- * can return. Client will not finish until all
- * servers are connected. Note - MGS-only server does
- * NOT get a client, since there is no lustre fs
- * associated - the MGS is for all lustre fs's */
- }
-
- rc = server_fill_super_common(sb);
- if (rc)
- GOTO(out_mnt, rc);
-
- RETURN(0);
-out_mnt:
- /* We jump here in case of failure while starting targets or MGS.
- * In this case we can't just put @mnt and have to do real cleanup
- * with stoping targets, etc. */
- server_put_super(sb);
- return rc;
-}
-
-/*
- * Calculate timeout value for a target.
- */
-void server_calc_timeout(struct lustre_sb_info *lsi, struct obd_device *obd)
-{
- struct lustre_mount_data *lmd;
- int soft = 0;
- int hard = 0;
- int factor = 0;
- bool has_ir = !!(lsi->lsi_flags & LDD_F_IR_CAPABLE);
- int min = OBD_RECOVERY_TIME_MIN;
-
- LASSERT(IS_SERVER(lsi));
-
- lmd = lsi->lsi_lmd;
- if (lmd) {
- soft = lmd->lmd_recovery_time_soft;
- hard = lmd->lmd_recovery_time_hard;
- has_ir = has_ir && !(lmd->lmd_flags & LMD_FLG_NOIR);
- obd->obd_no_ir = !has_ir;
- }
-
- if (soft == 0)
- soft = OBD_RECOVERY_TIME_SOFT;
- if (hard == 0)
- hard = OBD_RECOVERY_TIME_HARD;
-
- /* target may have ir_factor configured. */
- factor = OBD_IR_FACTOR_DEFAULT;
- if (obd->obd_recovery_ir_factor)
- factor = obd->obd_recovery_ir_factor;
-
- if (has_ir) {
- int new_soft = soft;
- int new_hard = hard;
-
- /* adjust timeout value by imperative recovery */
-
- new_soft = (soft * factor) / OBD_IR_FACTOR_MAX;
- new_hard = (hard * factor) / OBD_IR_FACTOR_MAX;
-
- /* make sure the timeout is not too short */
- new_soft = max(min, new_soft);
- new_hard = max(new_soft, new_hard);
-
- LCONSOLE_INFO("%s: Imperative Recovery enabled, recovery "
- "window shrunk from %d-%d down to %d-%d\n",
- obd->obd_name, soft, hard, new_soft, new_hard);
-
- soft = new_soft;
- hard = new_hard;
- }
-
- /* we're done */
- obd->obd_recovery_timeout = max(obd->obd_recovery_timeout, soft);
- obd->obd_recovery_time_hard = hard;
- obd->obd_recovery_ir_factor = factor;
-}
-EXPORT_SYMBOL(server_calc_timeout);
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff