diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/obdclass/obd_mount_server.c')
| -rw-r--r-- | drivers/staging/lustre/lustre/obdclass/obd_mount_server.c | 1783 |
1 files changed, 1783 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/obdclass/obd_mount_server.c b/drivers/staging/lustre/lustre/obdclass/obd_mount_server.c new file mode 100644 index 000000000000..a3a44091c433 --- /dev/null +++ b/drivers/staging/lustre/lustre/obdclass/obd_mount_server.c @@ -0,0 +1,1783 @@ +/* + * 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); |