+/*
+ * 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>
+#ifdef HAVE_KERNEL_LOCKED
+#include <linux/smp_lock.h>
+#endif
+
+/*********** mount lookup *********/
+
+DEFINE_MUTEX(lustre_mount_info_lock);
+static CFS_LIST_HEAD(server_mount_info_list);
+
+static struct lustre_mount_info *server_find_mount(const char *name)
+{
+ cfs_list_t *tmp;
+ struct lustre_mount_info *lmi;
+ ENTRY;
+
+ cfs_list_for_each(tmp, &server_mount_info_list) {
+ lmi = cfs_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;
+ cfs_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);
+ cfs_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);
+
+ cfs_atomic_inc(&lsi->lsi_mounts);
+
+ CDEBUG(D_MOUNT, "get_mnt %p from %s, refs=%d\n", lmi->lmi_mnt,
+ name, cfs_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, cfs_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 CFS_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;
+ CFS_INIT_LIST_HEAD(&lri->lri_list);
+ cfs_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);
+ cfs_list_for_each_entry_safe(lri, tmp, &lwp_register_list, lri_list) {
+ if (exp == lri->lri_exp) {
+ if (*exp)
+ class_export_put(*exp);
+ cfs_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);
+ cfs_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_CONNECT_PINGLESS;
+ 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_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);
git://git.whamcloud.com / fs / lustre-release.git / commitdiff