--- /dev/null
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2012, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/obdclass/obd_mount.c
+ *
+ * Client 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
+
+#include "../include/obd.h"
+#include "../include/linux/lustre_compat25.h"
+#include "../include/obd_class.h"
+#include "../include/lustre/lustre_user.h"
+#include "../include/lustre_log.h"
+#include "../include/lustre_disk.h"
+#include "../include/lustre_param.h"
+
+static int (*client_fill_super)(struct super_block *sb,
+ struct vfsmount *mnt);
+
+static void (*kill_super_cb)(struct super_block *sb);
+
+/**************** config llog ********************/
+
+/** Get a config log from the MGS and process it.
+ * This func is called for both clients and servers.
+ * Continue to process new statements appended to the logs
+ * (whenever the config lock is revoked) until lustre_end_log
+ * is called.
+ * @param sb The superblock is used by the MGC to write to the local copy of
+ * the config log
+ * @param logname The name of the llog to replicate from the MGS
+ * @param cfg Since the same mgc may be used to follow multiple config logs
+ * (e.g. ost1, ost2, client), the config_llog_instance keeps the state for
+ * this log, and is added to the mgc's list of logs to follow.
+ */
+int lustre_process_log(struct super_block *sb, char *logname,
+ struct config_llog_instance *cfg)
+{
+ struct lustre_cfg *lcfg;
+ struct lustre_cfg_bufs *bufs;
+ struct lustre_sb_info *lsi = s2lsi(sb);
+ struct obd_device *mgc = lsi->lsi_mgc;
+ int rc;
+
+ LASSERT(mgc);
+ LASSERT(cfg);
+
+ OBD_ALLOC_PTR(bufs);
+ if (bufs == NULL)
+ return -ENOMEM;
+
+ /* mgc_process_config */
+ lustre_cfg_bufs_reset(bufs, mgc->obd_name);
+ lustre_cfg_bufs_set_string(bufs, 1, logname);
+ lustre_cfg_bufs_set(bufs, 2, cfg, sizeof(*cfg));
+ lustre_cfg_bufs_set(bufs, 3, &sb, sizeof(sb));
+ lcfg = lustre_cfg_new(LCFG_LOG_START, bufs);
+ rc = obd_process_config(mgc, sizeof(*lcfg), lcfg);
+ lustre_cfg_free(lcfg);
+
+ OBD_FREE_PTR(bufs);
+
+ if (rc == -EINVAL)
+ LCONSOLE_ERROR_MSG(0x15b, "%s: The configuration from log '%s' failed from the MGS (%d). Make sure this client and the MGS are running compatible versions of Lustre.\n",
+ mgc->obd_name, logname, rc);
+
+ if (rc)
+ LCONSOLE_ERROR_MSG(0x15c, "%s: The configuration from log '%s' failed (%d). This may be the result of communication errors between this node and the MGS, a bad configuration, or other errors. See the syslog for more information.\n",
+ mgc->obd_name, logname,
+ rc);
+
+ /* class_obd_list(); */
+ return rc;
+}
+EXPORT_SYMBOL(lustre_process_log);
+
+/* Stop watching this config log for updates */
+int lustre_end_log(struct super_block *sb, char *logname,
+ struct config_llog_instance *cfg)
+{
+ struct lustre_cfg *lcfg;
+ struct lustre_cfg_bufs bufs;
+ struct lustre_sb_info *lsi = s2lsi(sb);
+ struct obd_device *mgc = lsi->lsi_mgc;
+ int rc;
+
+ if (!mgc)
+ return -ENOENT;
+
+ /* mgc_process_config */
+ lustre_cfg_bufs_reset(&bufs, mgc->obd_name);
+ lustre_cfg_bufs_set_string(&bufs, 1, logname);
+ if (cfg)
+ lustre_cfg_bufs_set(&bufs, 2, cfg, sizeof(*cfg));
+ lcfg = lustre_cfg_new(LCFG_LOG_END, &bufs);
+ rc = obd_process_config(mgc, sizeof(*lcfg), lcfg);
+ lustre_cfg_free(lcfg);
+ return rc;
+}
+EXPORT_SYMBOL(lustre_end_log);
+
+/**************** obd start *******************/
+
+/** lustre_cfg_bufs are a holdover from 1.4; we can still set these up from
+ * lctl (and do for echo cli/srv.
+ */
+int do_lcfg(char *cfgname, lnet_nid_t nid, int cmd,
+ char *s1, char *s2, char *s3, char *s4)
+{
+ struct lustre_cfg_bufs bufs;
+ struct lustre_cfg * lcfg = NULL;
+ int rc;
+
+ CDEBUG(D_TRACE, "lcfg %s %#x %s %s %s %s\n", cfgname,
+ cmd, s1, s2, s3, s4);
+
+ lustre_cfg_bufs_reset(&bufs, cfgname);
+ if (s1)
+ lustre_cfg_bufs_set_string(&bufs, 1, s1);
+ if (s2)
+ lustre_cfg_bufs_set_string(&bufs, 2, s2);
+ if (s3)
+ lustre_cfg_bufs_set_string(&bufs, 3, s3);
+ if (s4)
+ lustre_cfg_bufs_set_string(&bufs, 4, s4);
+
+ lcfg = lustre_cfg_new(cmd, &bufs);
+ lcfg->lcfg_nid = nid;
+ rc = class_process_config(lcfg);
+ lustre_cfg_free(lcfg);
+ return rc;
+}
+EXPORT_SYMBOL(do_lcfg);
+
+/** Call class_attach and class_setup. These methods in turn call
+ * obd type-specific methods.
+ */
+int lustre_start_simple(char *obdname, char *type, char *uuid,
+ char *s1, char *s2, char *s3, char *s4)
+{
+ int rc;
+ CDEBUG(D_MOUNT, "Starting obd %s (typ=%s)\n", obdname, type);
+
+ rc = do_lcfg(obdname, 0, LCFG_ATTACH, type, uuid, NULL, NULL);
+ if (rc) {
+ CERROR("%s attach error %d\n", obdname, rc);
+ return rc;
+ }
+ rc = do_lcfg(obdname, 0, LCFG_SETUP, s1, s2, s3, s4);
+ if (rc) {
+ CERROR("%s setup error %d\n", obdname, rc);
+ do_lcfg(obdname, 0, LCFG_DETACH, NULL, NULL, NULL, NULL);
+ }
+ return rc;
+}
+
+DEFINE_MUTEX(mgc_start_lock);
+
+/** Set up a mgc obd to process startup logs
+ *
+ * \param sb [in] super block of the mgc obd
+ *
+ * \retval 0 success, otherwise error code
+ */
+int lustre_start_mgc(struct super_block *sb)
+{
+ struct obd_connect_data *data = NULL;
+ struct lustre_sb_info *lsi = s2lsi(sb);
+ struct obd_device *obd;
+ struct obd_export *exp;
+ struct obd_uuid *uuid;
+ class_uuid_t uuidc;
+ lnet_nid_t nid;
+ char *mgcname = NULL, *niduuid = NULL, *mgssec = NULL;
+ char *ptr;
+ int rc = 0, i = 0, j, len;
+
+ LASSERT(lsi->lsi_lmd);
+
+ /* Find the first non-lo MGS nid for our MGC name */
+ if (IS_SERVER(lsi)) {
+ /* mount -o mgsnode=nid */
+ ptr = lsi->lsi_lmd->lmd_mgs;
+ if (lsi->lsi_lmd->lmd_mgs &&
+ (class_parse_nid(lsi->lsi_lmd->lmd_mgs, &nid, &ptr) == 0)) {
+ i++;
+ } else if (IS_MGS(lsi)) {
+ lnet_process_id_t id;
+ while ((rc = LNetGetId(i++, &id)) != -ENOENT) {
+ if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
+ continue;
+ nid = id.nid;
+ i++;
+ break;
+ }
+ }
+ } else { /* client */
+ /* Use nids from mount line: uml1,1@elan:uml2,2@elan:/lustre */
+ ptr = lsi->lsi_lmd->lmd_dev;
+ if (class_parse_nid(ptr, &nid, &ptr) == 0)
+ i++;
+ }
+ if (i == 0) {
+ CERROR("No valid MGS nids found.\n");
+ return -EINVAL;
+ }
+
+ mutex_lock(&mgc_start_lock);
+
+ len = strlen(LUSTRE_MGC_OBDNAME) + strlen(libcfs_nid2str(nid)) + 1;
+ OBD_ALLOC(mgcname, len);
+ OBD_ALLOC(niduuid, len + 2);
+ if (!mgcname || !niduuid) {
+ rc = -ENOMEM;
+ goto out_free;
+ }
+ sprintf(mgcname, "%s%s", LUSTRE_MGC_OBDNAME, libcfs_nid2str(nid));
+
+ mgssec = lsi->lsi_lmd->lmd_mgssec ? lsi->lsi_lmd->lmd_mgssec : "";
+
+ OBD_ALLOC_PTR(data);
+ if (data == NULL) {
+ rc = -ENOMEM;
+ goto out_free;
+ }
+
+ obd = class_name2obd(mgcname);
+ if (obd && !obd->obd_stopping) {
+ int recov_bk;
+
+ rc = obd_set_info_async(NULL, obd->obd_self_export,
+ strlen(KEY_MGSSEC), KEY_MGSSEC,
+ strlen(mgssec), mgssec, NULL);
+ if (rc)
+ goto out_free;
+
+ /* Re-using an existing MGC */
+ atomic_inc(&obd->u.cli.cl_mgc_refcount);
+
+ /* IR compatibility check, only for clients */
+ if (lmd_is_client(lsi->lsi_lmd)) {
+ int has_ir;
+ int vallen = sizeof(*data);
+ __u32 *flags = &lsi->lsi_lmd->lmd_flags;
+
+ rc = obd_get_info(NULL, obd->obd_self_export,
+ strlen(KEY_CONN_DATA), KEY_CONN_DATA,
+ &vallen, data, NULL);
+ LASSERT(rc == 0);
+ has_ir = OCD_HAS_FLAG(data, IMP_RECOV);
+ if (has_ir ^ !(*flags & LMD_FLG_NOIR)) {
+ /* LMD_FLG_NOIR is for test purpose only */
+ LCONSOLE_WARN(
+ "Trying to mount a client with IR setting not compatible with current mgc. Force to use current mgc setting that is IR %s.\n",
+ has_ir ? "enabled" : "disabled");
+ if (has_ir)
+ *flags &= ~LMD_FLG_NOIR;
+ else
+ *flags |= LMD_FLG_NOIR;
+ }
+ }
+
+ recov_bk = 0;
+ /* If we are restarting the MGS, don't try to keep the MGC's
+ old connection, or registration will fail. */
+ if (IS_MGS(lsi)) {
+ CDEBUG(D_MOUNT, "New MGS with live MGC\n");
+ recov_bk = 1;
+ }
+
+ /* Try all connections, but only once (again).
+ We don't want to block another target from starting
+ (using its local copy of the log), but we do want to connect
+ if at all possible. */
+ recov_bk++;
+ CDEBUG(D_MOUNT, "%s: Set MGC reconnect %d\n", mgcname,
+ recov_bk);
+ rc = obd_set_info_async(NULL, obd->obd_self_export,
+ sizeof(KEY_INIT_RECOV_BACKUP),
+ KEY_INIT_RECOV_BACKUP,
+ sizeof(recov_bk), &recov_bk, NULL);
+ rc = 0;
+ goto out;
+ }
+
+ CDEBUG(D_MOUNT, "Start MGC '%s'\n", mgcname);
+
+ /* Add the primary nids for the MGS */
+ i = 0;
+ sprintf(niduuid, "%s_%x", mgcname, i);
+ if (IS_SERVER(lsi)) {
+ ptr = lsi->lsi_lmd->lmd_mgs;
+ if (IS_MGS(lsi)) {
+ /* Use local nids (including LO) */
+ lnet_process_id_t id;
+ while ((rc = LNetGetId(i++, &id)) != -ENOENT) {
+ rc = do_lcfg(mgcname, id.nid,
+ LCFG_ADD_UUID, niduuid,
+ NULL, NULL, NULL);
+ }
+ } else {
+ /* Use mgsnode= nids */
+ /* mount -o mgsnode=nid */
+ if (lsi->lsi_lmd->lmd_mgs) {
+ ptr = lsi->lsi_lmd->lmd_mgs;
+ } else if (class_find_param(ptr, PARAM_MGSNODE,
+ &ptr) != 0) {
+ CERROR("No MGS nids given.\n");
+ rc = -EINVAL;
+ goto out_free;
+ }
+ while (class_parse_nid(ptr, &nid, &ptr) == 0) {
+ rc = do_lcfg(mgcname, nid,
+ LCFG_ADD_UUID, niduuid,
+ NULL, NULL, NULL);
+ i++;
+ }
+ }
+ } else { /* client */
+ /* Use nids from mount line: uml1,1@elan:uml2,2@elan:/lustre */
+ ptr = lsi->lsi_lmd->lmd_dev;
+ while (class_parse_nid(ptr, &nid, &ptr) == 0) {
+ rc = do_lcfg(mgcname, nid,
+ LCFG_ADD_UUID, niduuid, NULL, NULL, NULL);
+ i++;
+ /* Stop at the first failover nid */
+ if (*ptr == ':')
+ break;
+ }
+ }
+ if (i == 0) {
+ CERROR("No valid MGS nids found.\n");
+ rc = -EINVAL;
+ goto out_free;
+ }
+ lsi->lsi_lmd->lmd_mgs_failnodes = 1;
+
+ /* Random uuid for MGC allows easier reconnects */
+ OBD_ALLOC_PTR(uuid);
+ if (!uuid) {
+ rc = -ENOMEM;
+ goto out_free;
+ }
+
+ ll_generate_random_uuid(uuidc);
+ class_uuid_unparse(uuidc, uuid);
+
+ /* Start the MGC */
+ rc = lustre_start_simple(mgcname, LUSTRE_MGC_NAME,
+ (char *)uuid->uuid, LUSTRE_MGS_OBDNAME,
+ niduuid, NULL, NULL);
+ OBD_FREE_PTR(uuid);
+ if (rc)
+ goto out_free;
+
+ /* Add any failover MGS nids */
+ i = 1;
+ while (ptr && ((*ptr == ':' ||
+ class_find_param(ptr, PARAM_MGSNODE, &ptr) == 0))) {
+ /* New failover node */
+ sprintf(niduuid, "%s_%x", mgcname, i);
+ j = 0;
+ while (class_parse_nid_quiet(ptr, &nid, &ptr) == 0) {
+ j++;
+ rc = do_lcfg(mgcname, nid,
+ LCFG_ADD_UUID, niduuid, NULL, NULL, NULL);
+ if (*ptr == ':')
+ break;
+ }
+ if (j > 0) {
+ rc = do_lcfg(mgcname, 0, LCFG_ADD_CONN,
+ niduuid, NULL, NULL, NULL);
+ i++;
+ } else {
+ /* at ":/fsname" */
+ break;
+ }
+ }
+ lsi->lsi_lmd->lmd_mgs_failnodes = i;
+
+ obd = class_name2obd(mgcname);
+ if (!obd) {
+ CERROR("Can't find mgcobd %s\n", mgcname);
+ rc = -ENOTCONN;
+ goto out_free;
+ }
+
+ rc = obd_set_info_async(NULL, obd->obd_self_export,
+ strlen(KEY_MGSSEC), KEY_MGSSEC,
+ strlen(mgssec), mgssec, NULL);
+ if (rc)
+ goto out_free;
+
+ /* Keep a refcount of servers/clients who started with "mount",
+ so we know when we can get rid of the mgc. */
+ atomic_set(&obd->u.cli.cl_mgc_refcount, 1);
+
+ /* We connect to the MGS at setup, and don't disconnect until cleanup */
+ data->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_AT |
+ OBD_CONNECT_FULL20 | OBD_CONNECT_IMP_RECOV |
+ OBD_CONNECT_LVB_TYPE;
+
+#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 2, 50, 0)
+ data->ocd_connect_flags |= OBD_CONNECT_MNE_SWAB;
+#else
+#warning "LU-1644: Remove old OBD_CONNECT_MNE_SWAB fixup and imp_need_mne_swab"
+#endif
+
+ if (lmd_is_client(lsi->lsi_lmd) &&
+ lsi->lsi_lmd->lmd_flags & LMD_FLG_NOIR)
+ data->ocd_connect_flags &= ~OBD_CONNECT_IMP_RECOV;
+ data->ocd_version = LUSTRE_VERSION_CODE;
+ rc = obd_connect(NULL, &exp, obd, &(obd->obd_uuid), data, NULL);
+ if (rc) {
+ CERROR("connect failed %d\n", rc);
+ goto out;
+ }
+
+ obd->u.cli.cl_mgc_mgsexp = exp;
+
+out:
+ /* Keep the mgc info in the sb. Note that many lsi's can point
+ to the same mgc.*/
+ lsi->lsi_mgc = obd;
+out_free:
+ mutex_unlock(&mgc_start_lock);
+
+ if (data)
+ OBD_FREE_PTR(data);
+ if (mgcname)
+ OBD_FREE(mgcname, len);
+ if (niduuid)
+ OBD_FREE(niduuid, len + 2);
+ return rc;
+}
+
+static int lustre_stop_mgc(struct super_block *sb)
+{
+ struct lustre_sb_info *lsi = s2lsi(sb);
+ struct obd_device *obd;
+ char *niduuid = NULL, *ptr = NULL;
+ int i, rc = 0, len = 0;
+
+ if (!lsi)
+ return -ENOENT;
+ obd = lsi->lsi_mgc;
+ if (!obd)
+ return -ENOENT;
+ lsi->lsi_mgc = NULL;
+
+ mutex_lock(&mgc_start_lock);
+ LASSERT(atomic_read(&obd->u.cli.cl_mgc_refcount) > 0);
+ if (!atomic_dec_and_test(&obd->u.cli.cl_mgc_refcount)) {
+ /* This is not fatal, every client that stops
+ will call in here. */
+ CDEBUG(D_MOUNT, "mgc still has %d references.\n",
+ atomic_read(&obd->u.cli.cl_mgc_refcount));
+ rc = -EBUSY;
+ goto out;
+ }
+
+ /* The MGC has no recoverable data in any case.
+ * force shutdown set in umount_begin */
+ obd->obd_no_recov = 1;
+
+ if (obd->u.cli.cl_mgc_mgsexp) {
+ /* An error is not fatal, if we are unable to send the
+ disconnect mgs ping evictor cleans up the export */
+ rc = obd_disconnect(obd->u.cli.cl_mgc_mgsexp);
+ if (rc)
+ CDEBUG(D_MOUNT, "disconnect failed %d\n", rc);
+ }
+
+ /* Save the obdname for cleaning the nid uuids, which are
+ obdname_XX */
+ len = strlen(obd->obd_name) + 6;
+ OBD_ALLOC(niduuid, len);
+ if (niduuid) {
+ strcpy(niduuid, obd->obd_name);
+ ptr = niduuid + strlen(niduuid);
+ }
+
+ rc = class_manual_cleanup(obd);
+ if (rc)
+ goto out;
+
+ /* Clean the nid uuids */
+ if (!niduuid) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ for (i = 0; i < lsi->lsi_lmd->lmd_mgs_failnodes; i++) {
+ sprintf(ptr, "_%x", i);
+ rc = do_lcfg(LUSTRE_MGC_OBDNAME, 0, LCFG_DEL_UUID,
+ niduuid, NULL, NULL, NULL);
+ if (rc)
+ CERROR("del MDC UUID %s failed: rc = %d\n",
+ niduuid, rc);
+ }
+out:
+ if (niduuid)
+ OBD_FREE(niduuid, len);
+
+ /* class_import_put will get rid of the additional connections */
+ mutex_unlock(&mgc_start_lock);
+ return rc;
+}
+
+/***************** lustre superblock **************/
+
+struct lustre_sb_info *lustre_init_lsi(struct super_block *sb)
+{
+ struct lustre_sb_info *lsi;
+
+ OBD_ALLOC_PTR(lsi);
+ if (!lsi)
+ return NULL;
+ OBD_ALLOC_PTR(lsi->lsi_lmd);
+ if (!lsi->lsi_lmd) {
+ OBD_FREE_PTR(lsi);
+ return NULL;
+ }
+
+ lsi->lsi_lmd->lmd_exclude_count = 0;
+ lsi->lsi_lmd->lmd_recovery_time_soft = 0;
+ lsi->lsi_lmd->lmd_recovery_time_hard = 0;
+ s2lsi_nocast(sb) = lsi;
+ /* we take 1 extra ref for our setup */
+ atomic_set(&lsi->lsi_mounts, 1);
+
+ /* Default umount style */
+ lsi->lsi_flags = LSI_UMOUNT_FAILOVER;
+
+ return lsi;
+}
+
+static int lustre_free_lsi(struct super_block *sb)
+{
+ struct lustre_sb_info *lsi = s2lsi(sb);
+
+ LASSERT(lsi != NULL);
+ CDEBUG(D_MOUNT, "Freeing lsi %p\n", lsi);
+
+ /* someone didn't call server_put_mount. */
+ LASSERT(atomic_read(&lsi->lsi_mounts) == 0);
+
+ if (lsi->lsi_lmd != NULL) {
+ if (lsi->lsi_lmd->lmd_dev != NULL)
+ OBD_FREE(lsi->lsi_lmd->lmd_dev,
+ strlen(lsi->lsi_lmd->lmd_dev) + 1);
+ if (lsi->lsi_lmd->lmd_profile != NULL)
+ OBD_FREE(lsi->lsi_lmd->lmd_profile,
+ strlen(lsi->lsi_lmd->lmd_profile) + 1);
+ if (lsi->lsi_lmd->lmd_mgssec != NULL)
+ OBD_FREE(lsi->lsi_lmd->lmd_mgssec,
+ strlen(lsi->lsi_lmd->lmd_mgssec) + 1);
+ if (lsi->lsi_lmd->lmd_opts != NULL)
+ OBD_FREE(lsi->lsi_lmd->lmd_opts,
+ strlen(lsi->lsi_lmd->lmd_opts) + 1);
+ if (lsi->lsi_lmd->lmd_exclude_count)
+ OBD_FREE(lsi->lsi_lmd->lmd_exclude,
+ sizeof(lsi->lsi_lmd->lmd_exclude[0]) *
+ lsi->lsi_lmd->lmd_exclude_count);
+ if (lsi->lsi_lmd->lmd_mgs != NULL)
+ OBD_FREE(lsi->lsi_lmd->lmd_mgs,
+ strlen(lsi->lsi_lmd->lmd_mgs) + 1);
+ if (lsi->lsi_lmd->lmd_osd_type != NULL)
+ OBD_FREE(lsi->lsi_lmd->lmd_osd_type,
+ strlen(lsi->lsi_lmd->lmd_osd_type) + 1);
+ if (lsi->lsi_lmd->lmd_params != NULL)
+ OBD_FREE(lsi->lsi_lmd->lmd_params, 4096);
+
+ OBD_FREE(lsi->lsi_lmd, sizeof(*lsi->lsi_lmd));
+ }
+
+ LASSERT(lsi->lsi_llsbi == NULL);
+ OBD_FREE(lsi, sizeof(*lsi));
+ s2lsi_nocast(sb) = NULL;
+
+ return 0;
+}
+
+/* The lsi has one reference for every server that is using the disk -
+ e.g. MDT, MGS, and potentially MGC */
+int lustre_put_lsi(struct super_block *sb)
+{
+ struct lustre_sb_info *lsi = s2lsi(sb);
+
+ LASSERT(lsi != NULL);
+
+ CDEBUG(D_MOUNT, "put %p %d\n", sb, atomic_read(&lsi->lsi_mounts));
+ if (atomic_dec_and_test(&lsi->lsi_mounts)) {
+ if (IS_SERVER(lsi) && lsi->lsi_osd_exp) {
+ lu_device_put(&lsi->lsi_dt_dev->dd_lu_dev);
+ lsi->lsi_osd_exp->exp_obd->obd_lvfs_ctxt.dt = NULL;
+ lsi->lsi_dt_dev = NULL;
+ obd_disconnect(lsi->lsi_osd_exp);
+ /* wait till OSD is gone */
+ obd_zombie_barrier();
+ }
+ lustre_free_lsi(sb);
+ return 1;
+ }
+ return 0;
+}
+
+/*** SERVER NAME ***
+ * <FSNAME><SEPARATOR><TYPE><INDEX>
+ * FSNAME is between 1 and 8 characters (inclusive).
+ * Excluded characters are '/' and ':'
+ * SEPARATOR is either ':' or '-'
+ * TYPE: "OST", "MDT", etc.
+ * INDEX: Hex representation of the index
+ */
+
+/** Get the fsname ("lustre") from the server name ("lustre-OST003F").
+ * @param [in] svname server name including type and index
+ * @param [out] fsname Buffer to copy filesystem name prefix into.
+ * Must have at least 'strlen(fsname) + 1' chars.
+ * @param [out] endptr if endptr isn't NULL it is set to end of fsname
+ * rc < 0 on error
+ */
+int server_name2fsname(const char *svname, char *fsname, const char **endptr)
+{
+ const char *dash;
+
+ dash = svname + strnlen(svname, 8); /* max fsname length is 8 */
+ for (; dash > svname && *dash != '-' && *dash != ':'; dash--)
+ ;
+ if (dash == svname)
+ return -EINVAL;
+
+ if (fsname != NULL) {
+ strncpy(fsname, svname, dash - svname);
+ fsname[dash - svname] = '\0';
+ }
+
+ if (endptr != NULL)
+ *endptr = dash;
+
+ return 0;
+}
+EXPORT_SYMBOL(server_name2fsname);
+
+/**
+ * Get service name (svname) from string
+ * rc < 0 on error
+ * if endptr isn't NULL it is set to end of fsname *
+ */
+int server_name2svname(const char *label, char *svname, const char **endptr,
+ size_t svsize)
+{
+ int rc;
+ const char *dash;
+
+ /* We use server_name2fsname() just for parsing */
+ rc = server_name2fsname(label, NULL, &dash);
+ if (rc != 0)
+ return rc;
+
+ if (endptr != NULL)
+ *endptr = dash;
+
+ if (strlcpy(svname, dash + 1, svsize) >= svsize)
+ return -E2BIG;
+
+ return 0;
+}
+EXPORT_SYMBOL(server_name2svname);
+
+
+/* Get the index from the obd name.
+ rc = server type, or
+ rc < 0 on error
+ if endptr isn't NULL it is set to end of name */
+int server_name2index(const char *svname, __u32 *idx, const char **endptr)
+{
+ unsigned long index;
+ int rc;
+ const char *dash;
+
+ /* We use server_name2fsname() just for parsing */
+ rc = server_name2fsname(svname, NULL, &dash);
+ if (rc != 0)
+ return rc;
+
+ dash++;
+
+ if (strncmp(dash, "MDT", 3) == 0)
+ rc = LDD_F_SV_TYPE_MDT;
+ else if (strncmp(dash, "OST", 3) == 0)
+ rc = LDD_F_SV_TYPE_OST;
+ else
+ return -EINVAL;
+
+ dash += 3;
+
+ if (strncmp(dash, "all", 3) == 0) {
+ if (endptr != NULL)
+ *endptr = dash + 3;
+ return rc | LDD_F_SV_ALL;
+ }
+
+ index = simple_strtoul(dash, (char **)endptr, 16);
+ if (idx != NULL)
+ *idx = index;
+
+ /* Account for -mdc after index that is possible when specifying mdt */
+ if (endptr != NULL && strncmp(LUSTRE_MDC_NAME, *endptr + 1,
+ sizeof(LUSTRE_MDC_NAME)-1) == 0)
+ *endptr += sizeof(LUSTRE_MDC_NAME);
+
+ return rc;
+}
+EXPORT_SYMBOL(server_name2index);
+
+/*************** mount common between server and client ***************/
+
+/* Common umount */
+int lustre_common_put_super(struct super_block *sb)
+{
+ int rc;
+
+ CDEBUG(D_MOUNT, "dropping sb %p\n", sb);
+
+ /* Drop a ref to the MGC */
+ rc = lustre_stop_mgc(sb);
+ if (rc && (rc != -ENOENT)) {
+ if (rc != -EBUSY) {
+ CERROR("Can't stop MGC: %d\n", rc);
+ return rc;
+ }
+ /* BUSY just means that there's some other obd that
+ needs the mgc. Let him clean it up. */
+ CDEBUG(D_MOUNT, "MGC still in use\n");
+ }
+ /* Drop a ref to the mounted disk */
+ lustre_put_lsi(sb);
+ lu_types_stop();
+ return rc;
+}
+EXPORT_SYMBOL(lustre_common_put_super);
+
+static void lmd_print(struct lustre_mount_data *lmd)
+{
+ int i;
+
+ PRINT_CMD(D_MOUNT, " mount data:\n");
+ if (lmd_is_client(lmd))
+ PRINT_CMD(D_MOUNT, "profile: %s\n", lmd->lmd_profile);
+ PRINT_CMD(D_MOUNT, "device: %s\n", lmd->lmd_dev);
+ PRINT_CMD(D_MOUNT, "flags: %x\n", lmd->lmd_flags);
+
+ if (lmd->lmd_opts)
+ PRINT_CMD(D_MOUNT, "options: %s\n", lmd->lmd_opts);
+
+ if (lmd->lmd_recovery_time_soft)
+ PRINT_CMD(D_MOUNT, "recovery time soft: %d\n",
+ lmd->lmd_recovery_time_soft);
+
+ if (lmd->lmd_recovery_time_hard)
+ PRINT_CMD(D_MOUNT, "recovery time hard: %d\n",
+ lmd->lmd_recovery_time_hard);
+
+ for (i = 0; i < lmd->lmd_exclude_count; i++) {
+ PRINT_CMD(D_MOUNT, "exclude %d: OST%04x\n", i,
+ lmd->lmd_exclude[i]);
+ }
+}
+
+/* Is this server on the exclusion list */
+int lustre_check_exclusion(struct super_block *sb, char *svname)
+{
+ struct lustre_sb_info *lsi = s2lsi(sb);
+ struct lustre_mount_data *lmd = lsi->lsi_lmd;
+ __u32 index;
+ int i, rc;
+
+ rc = server_name2index(svname, &index, NULL);
+ if (rc != LDD_F_SV_TYPE_OST)
+ /* Only exclude OSTs */
+ return 0;
+
+ CDEBUG(D_MOUNT, "Check exclusion %s (%d) in %d of %s\n", svname,
+ index, lmd->lmd_exclude_count, lmd->lmd_dev);
+
+ for (i = 0; i < lmd->lmd_exclude_count; i++) {
+ if (index == lmd->lmd_exclude[i]) {
+ CWARN("Excluding %s (on exclusion list)\n", svname);
+ return 1;
+ }
+ }
+ return 0;
+}
+
+/* mount -v -o exclude=lustre-OST0001:lustre-OST0002 -t lustre ... */
+static int lmd_make_exclusion(struct lustre_mount_data *lmd, const char *ptr)
+{
+ const char *s1 = ptr, *s2;
+ __u32 index, *exclude_list;
+ int rc = 0, devmax;
+
+ /* The shortest an ost name can be is 8 chars: -OST0000.
+ We don't actually know the fsname at this time, so in fact
+ a user could specify any fsname. */
+ devmax = strlen(ptr) / 8 + 1;
+
+ /* temp storage until we figure out how many we have */
+ OBD_ALLOC(exclude_list, sizeof(index) * devmax);
+ if (!exclude_list)
+ return -ENOMEM;
+
+ /* we enter this fn pointing at the '=' */
+ while (*s1 && *s1 != ' ' && *s1 != ',') {
+ s1++;
+ rc = server_name2index(s1, &index, &s2);
+ if (rc < 0) {
+ CERROR("Can't parse server name '%s': rc = %d\n",
+ s1, rc);
+ break;
+ }
+ if (rc == LDD_F_SV_TYPE_OST)
+ exclude_list[lmd->lmd_exclude_count++] = index;
+ else
+ CDEBUG(D_MOUNT, "ignoring exclude %.*s: type = %#x\n",
+ (uint)(s2-s1), s1, rc);
+ s1 = s2;
+ /* now we are pointing at ':' (next exclude)
+ or ',' (end of excludes) */
+ if (lmd->lmd_exclude_count >= devmax)
+ break;
+ }
+ if (rc >= 0) /* non-err */
+ rc = 0;
+
+ if (lmd->lmd_exclude_count) {
+ /* permanent, freed in lustre_free_lsi */
+ OBD_ALLOC(lmd->lmd_exclude, sizeof(index) *
+ lmd->lmd_exclude_count);
+ if (lmd->lmd_exclude) {
+ memcpy(lmd->lmd_exclude, exclude_list,
+ sizeof(index) * lmd->lmd_exclude_count);
+ } else {
+ rc = -ENOMEM;
+ lmd->lmd_exclude_count = 0;
+ }
+ }
+ OBD_FREE(exclude_list, sizeof(index) * devmax);
+ return rc;
+}
+
+static int lmd_parse_mgssec(struct lustre_mount_data *lmd, char *ptr)
+{
+ char *tail;
+ int length;
+
+ if (lmd->lmd_mgssec != NULL) {
+ OBD_FREE(lmd->lmd_mgssec, strlen(lmd->lmd_mgssec) + 1);
+ lmd->lmd_mgssec = NULL;
+ }
+
+ tail = strchr(ptr, ',');
+ if (tail == NULL)
+ length = strlen(ptr);
+ else
+ length = tail - ptr;
+
+ OBD_ALLOC(lmd->lmd_mgssec, length + 1);
+ if (lmd->lmd_mgssec == NULL)
+ return -ENOMEM;
+
+ memcpy(lmd->lmd_mgssec, ptr, length);
+ lmd->lmd_mgssec[length] = '\0';
+ return 0;
+}
+
+static int lmd_parse_string(char **handle, char *ptr)
+{
+ char *tail;
+ int length;
+
+ if ((handle == NULL) || (ptr == NULL))
+ return -EINVAL;
+
+ if (*handle != NULL) {
+ OBD_FREE(*handle, strlen(*handle) + 1);
+ *handle = NULL;
+ }
+
+ tail = strchr(ptr, ',');
+ if (tail == NULL)
+ length = strlen(ptr);
+ else
+ length = tail - ptr;
+
+ OBD_ALLOC(*handle, length + 1);
+ if (*handle == NULL)
+ return -ENOMEM;
+
+ memcpy(*handle, ptr, length);
+ (*handle)[length] = '\0';
+
+ return 0;
+}
+
+/* Collect multiple values for mgsnid specifiers */
+static int lmd_parse_mgs(struct lustre_mount_data *lmd, char **ptr)
+{
+ lnet_nid_t nid;
+ char *tail = *ptr;
+ char *mgsnid;
+ int length;
+ int oldlen = 0;
+
+ /* Find end of nidlist */
+ while (class_parse_nid_quiet(tail, &nid, &tail) == 0) {}
+ length = tail - *ptr;
+ if (length == 0) {
+ LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", *ptr);
+ return -EINVAL;
+ }
+
+ if (lmd->lmd_mgs != NULL)
+ oldlen = strlen(lmd->lmd_mgs) + 1;
+
+ OBD_ALLOC(mgsnid, oldlen + length + 1);
+ if (mgsnid == NULL)
+ return -ENOMEM;
+
+ if (lmd->lmd_mgs != NULL) {
+ /* Multiple mgsnid= are taken to mean failover locations */
+ memcpy(mgsnid, lmd->lmd_mgs, oldlen);
+ mgsnid[oldlen - 1] = ':';
+ OBD_FREE(lmd->lmd_mgs, oldlen);
+ }
+ memcpy(mgsnid + oldlen, *ptr, length);
+ mgsnid[oldlen + length] = '\0';
+ lmd->lmd_mgs = mgsnid;
+ *ptr = tail;
+
+ return 0;
+}
+
+/** Parse mount line options
+ * e.g. mount -v -t lustre -o abort_recov uml1:uml2:/lustre-client /mnt/lustre
+ * dev is passed as device=uml1:/lustre by mount.lustre
+ */
+static int lmd_parse(char *options, struct lustre_mount_data *lmd)
+{
+ char *s1, *s2, *devname = NULL;
+ struct lustre_mount_data *raw = (struct lustre_mount_data *)options;
+ int rc = 0;
+
+ LASSERT(lmd);
+ if (!options) {
+ LCONSOLE_ERROR_MSG(0x162, "Missing mount data: check that /sbin/mount.lustre is installed.\n");
+ return -EINVAL;
+ }
+
+ /* Options should be a string - try to detect old lmd data */
+ if ((raw->lmd_magic & 0xffffff00) == (LMD_MAGIC & 0xffffff00)) {
+ LCONSOLE_ERROR_MSG(0x163, "You're using an old version of /sbin/mount.lustre. Please install version %s\n",
+ LUSTRE_VERSION_STRING);
+ return -EINVAL;
+ }
+ lmd->lmd_magic = LMD_MAGIC;
+
+ OBD_ALLOC(lmd->lmd_params, 4096);
+ if (lmd->lmd_params == NULL)
+ return -ENOMEM;
+ lmd->lmd_params[0] = '\0';
+
+ /* Set default flags here */
+
+ s1 = options;
+ while (*s1) {
+ int clear = 0;
+ int time_min = OBD_RECOVERY_TIME_MIN;
+
+ /* Skip whitespace and extra commas */
+ while (*s1 == ' ' || *s1 == ',')
+ s1++;
+
+ /* Client options are parsed in ll_options: eg. flock,
+ user_xattr, acl */
+
+ /* Parse non-ldiskfs options here. Rather than modifying
+ ldiskfs, we just zero these out here */
+ if (strncmp(s1, "abort_recov", 11) == 0) {
+ lmd->lmd_flags |= LMD_FLG_ABORT_RECOV;
+ clear++;
+ } else if (strncmp(s1, "recovery_time_soft=", 19) == 0) {
+ lmd->lmd_recovery_time_soft = max_t(int,
+ simple_strtoul(s1 + 19, NULL, 10), time_min);
+ clear++;
+ } else if (strncmp(s1, "recovery_time_hard=", 19) == 0) {
+ lmd->lmd_recovery_time_hard = max_t(int,
+ simple_strtoul(s1 + 19, NULL, 10), time_min);
+ clear++;
+ } else if (strncmp(s1, "noir", 4) == 0) {
+ lmd->lmd_flags |= LMD_FLG_NOIR; /* test purpose only. */
+ clear++;
+ } else if (strncmp(s1, "nosvc", 5) == 0) {
+ lmd->lmd_flags |= LMD_FLG_NOSVC;
+ clear++;
+ } else if (strncmp(s1, "nomgs", 5) == 0) {
+ lmd->lmd_flags |= LMD_FLG_NOMGS;
+ clear++;
+ } else if (strncmp(s1, "noscrub", 7) == 0) {
+ lmd->lmd_flags |= LMD_FLG_NOSCRUB;
+ clear++;
+ } else if (strncmp(s1, PARAM_MGSNODE,
+ sizeof(PARAM_MGSNODE) - 1) == 0) {
+ s2 = s1 + sizeof(PARAM_MGSNODE) - 1;
+ /* Assume the next mount opt is the first
+ invalid nid we get to. */
+ rc = lmd_parse_mgs(lmd, &s2);
+ if (rc)
+ goto invalid;
+ clear++;
+ } else if (strncmp(s1, "writeconf", 9) == 0) {
+ lmd->lmd_flags |= LMD_FLG_WRITECONF;
+ clear++;
+ } else if (strncmp(s1, "update", 6) == 0) {
+ lmd->lmd_flags |= LMD_FLG_UPDATE;
+ clear++;
+ } else if (strncmp(s1, "virgin", 6) == 0) {
+ lmd->lmd_flags |= LMD_FLG_VIRGIN;
+ clear++;
+ } else if (strncmp(s1, "noprimnode", 10) == 0) {
+ lmd->lmd_flags |= LMD_FLG_NO_PRIMNODE;
+ clear++;
+ } else if (strncmp(s1, "mgssec=", 7) == 0) {
+ rc = lmd_parse_mgssec(lmd, s1 + 7);
+ if (rc)
+ goto invalid;
+ clear++;
+ /* ost exclusion list */
+ } else if (strncmp(s1, "exclude=", 8) == 0) {
+ rc = lmd_make_exclusion(lmd, s1 + 7);
+ if (rc)
+ goto invalid;
+ clear++;
+ } else if (strncmp(s1, "mgs", 3) == 0) {
+ /* We are an MGS */
+ lmd->lmd_flags |= LMD_FLG_MGS;
+ clear++;
+ } else if (strncmp(s1, "svname=", 7) == 0) {
+ rc = lmd_parse_string(&lmd->lmd_profile, s1 + 7);
+ if (rc)
+ goto invalid;
+ clear++;
+ } else if (strncmp(s1, "param=", 6) == 0) {
+ int length;
+ char *tail = strchr(s1 + 6, ',');
+ if (tail == NULL)
+ length = strlen(s1);
+ else
+ length = tail - s1;
+ length -= 6;
+ strncat(lmd->lmd_params, s1 + 6, length);
+ strcat(lmd->lmd_params, " ");
+ clear++;
+ } else if (strncmp(s1, "osd=", 4) == 0) {
+ rc = lmd_parse_string(&lmd->lmd_osd_type, s1 + 4);
+ if (rc)
+ goto invalid;
+ clear++;
+ }
+ /* Linux 2.4 doesn't pass the device, so we stuck it at the
+ end of the options. */
+ else if (strncmp(s1, "device=", 7) == 0) {
+ devname = s1 + 7;
+ /* terminate options right before device. device
+ must be the last one. */
+ *s1 = '\0';
+ break;
+ }
+
+ /* Find next opt */
+ s2 = strchr(s1, ',');
+ if (s2 == NULL) {
+ if (clear)
+ *s1 = '\0';
+ break;
+ }
+ s2++;
+ if (clear)
+ memmove(s1, s2, strlen(s2) + 1);
+ else
+ s1 = s2;
+ }
+
+ if (!devname) {
+ LCONSOLE_ERROR_MSG(0x164, "Can't find the device name (need mount option 'device=...')\n");
+ goto invalid;
+ }
+
+ s1 = strstr(devname, ":/");
+ if (s1) {
+ ++s1;
+ lmd->lmd_flags |= LMD_FLG_CLIENT;
+ /* Remove leading /s from fsname */
+ while (*++s1 == '/') ;
+ /* Freed in lustre_free_lsi */
+ OBD_ALLOC(lmd->lmd_profile, strlen(s1) + 8);
+ if (!lmd->lmd_profile)
+ return -ENOMEM;
+ sprintf(lmd->lmd_profile, "%s-client", s1);
+ }
+
+ /* Freed in lustre_free_lsi */
+ OBD_ALLOC(lmd->lmd_dev, strlen(devname) + 1);
+ if (!lmd->lmd_dev)
+ return -ENOMEM;
+ strcpy(lmd->lmd_dev, devname);
+
+ /* Save mount options */
+ s1 = options + strlen(options) - 1;
+ while (s1 >= options && (*s1 == ',' || *s1 == ' '))
+ *s1-- = 0;
+ if (*options != 0) {
+ /* Freed in lustre_free_lsi */
+ OBD_ALLOC(lmd->lmd_opts, strlen(options) + 1);
+ if (!lmd->lmd_opts)
+ return -ENOMEM;
+ strcpy(lmd->lmd_opts, options);
+ }
+
+ lmd_print(lmd);
+ lmd->lmd_magic = LMD_MAGIC;
+
+ return rc;
+
+invalid:
+ CERROR("Bad mount options %s\n", options);
+ return -EINVAL;
+}
+
+struct lustre_mount_data2 {
+ void *lmd2_data;
+ struct vfsmount *lmd2_mnt;
+};
+
+/** This is the entry point for the mount call into Lustre.
+ * This is called when a server or client is mounted,
+ * and this is where we start setting things up.
+ * @param data Mount options (e.g. -o flock,abort_recov)
+ */
+int lustre_fill_super(struct super_block *sb, void *data, int silent)
+{
+ struct lustre_mount_data *lmd;
+ struct lustre_mount_data2 *lmd2 = data;
+ struct lustre_sb_info *lsi;
+ int rc;
+
+ CDEBUG(D_MOUNT|D_VFSTRACE, "VFS Op: sb %p\n", sb);
+
+ lsi = lustre_init_lsi(sb);
+ if (!lsi)
+ return -ENOMEM;
+ lmd = lsi->lsi_lmd;
+
+ /*
+ * Disable lockdep during mount, because mount locking patterns are
+ * `special'.
+ */
+ lockdep_off();
+
+ /*
+ * LU-639: the obd cleanup of last mount may not finish yet, wait here.
+ */
+ obd_zombie_barrier();
+
+ /* Figure out the lmd from the mount options */
+ if (lmd_parse((char *)(lmd2->lmd2_data), lmd)) {
+ lustre_put_lsi(sb);
+ rc = -EINVAL;
+ goto out;
+ }
+
+ if (lmd_is_client(lmd)) {
+ CDEBUG(D_MOUNT, "Mounting client %s\n", lmd->lmd_profile);
+ if (client_fill_super == NULL)
+ request_module("lustre");
+ if (client_fill_super == NULL) {
+ LCONSOLE_ERROR_MSG(0x165, "Nothing registered for client mount! Is the 'lustre' module loaded?\n");
+ lustre_put_lsi(sb);
+ rc = -ENODEV;
+ } else {
+ rc = lustre_start_mgc(sb);
+ if (rc) {
+ lustre_put_lsi(sb);
+ goto out;
+ }
+ /* Connect and start */
+ /* (should always be ll_fill_super) */
+ rc = (*client_fill_super)(sb, lmd2->lmd2_mnt);
+ /* c_f_s will call lustre_common_put_super on failure */
+ }
+ } else {
+ CERROR("This is client-side-only module, cannot handle server mount.\n");
+ rc = -EINVAL;
+ }
+
+ /* If error happens in fill_super() call, @lsi will be killed there.
+ * This is why we do not put it here. */
+ goto out;
+out:
+ if (rc) {
+ CERROR("Unable to mount %s (%d)\n",
+ s2lsi(sb) ? lmd->lmd_dev : "", rc);
+ } else {
+ CDEBUG(D_SUPER, "Mount %s complete\n",
+ lmd->lmd_dev);
+ }
+ lockdep_on();
+ return rc;
+}
+
+
+/* We can't call ll_fill_super by name because it lives in a module that
+ must be loaded after this one. */
+void lustre_register_client_fill_super(int (*cfs)(struct super_block *sb,
+ struct vfsmount *mnt))
+{
+ client_fill_super = cfs;
+}
+EXPORT_SYMBOL(lustre_register_client_fill_super);
+
+void lustre_register_kill_super_cb(void (*cfs)(struct super_block *sb))
+{
+ kill_super_cb = cfs;
+}
+EXPORT_SYMBOL(lustre_register_kill_super_cb);
+
+/***************** FS registration ******************/
+struct dentry *lustre_mount(struct file_system_type *fs_type, int flags,
+ const char *devname, void *data)
+{
+ struct lustre_mount_data2 lmd2 = {
+ .lmd2_data = data,
+ .lmd2_mnt = NULL
+ };
+
+ return mount_nodev(fs_type, flags, &lmd2, lustre_fill_super);
+}
+
+static void lustre_kill_super(struct super_block *sb)
+{
+ struct lustre_sb_info *lsi = s2lsi(sb);
+
+ if (kill_super_cb && lsi && !IS_SERVER(lsi))
+ (*kill_super_cb)(sb);
+
+ kill_anon_super(sb);
+}
+
+/** Register the "lustre" fs type
+ */
+struct file_system_type lustre_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "lustre",
+ .mount = lustre_mount,
+ .kill_sb = lustre_kill_super,
+ .fs_flags = FS_BINARY_MOUNTDATA | FS_REQUIRES_DEV |
+ FS_HAS_FIEMAP | FS_RENAME_DOES_D_MOVE,
+};
+MODULE_ALIAS_FS("lustre");
+
+int lustre_register_fs(void)
+{
+ return register_filesystem(&lustre_fs_type);
+}
+
+int lustre_unregister_fs(void)
+{
+ return unregister_filesystem(&lustre_fs_type);
+}
Code Review / kvmfornfv.git / blobdiff