diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/mgc/libmgc.c')
| -rw-r--r-- | drivers/staging/lustre/lustre/mgc/libmgc.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/mgc/libmgc.c b/drivers/staging/lustre/lustre/mgc/libmgc.c new file mode 100644 index 000000000000..442146cc7e60 --- /dev/null +++ b/drivers/staging/lustre/lustre/mgc/libmgc.c @@ -0,0 +1,166 @@ +/* + * 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/mgc/libmgc.c + * + * Lustre Management Client + * Author: Nathan Rutman <nathan@clusterfs.com> + */ + +/* Minimal MGC for liblustre: only used to read the config log from the MGS + at setup time, no updates. */ + +#define DEBUG_SUBSYSTEM S_MGC + +#include <liblustre.h> + +#include <obd_class.h> +#include <lustre_dlm.h> +#include <lustre_log.h> +#include <lustre_fsfilt.h> +#include <lustre_disk.h> + + +static int mgc_setup(struct obd_device *obd, struct lustre_cfg *lcfg) +{ + int rc; + ENTRY; + + ptlrpcd_addref(); + + rc = client_obd_setup(obd, lcfg); + if (rc) + GOTO(err_decref, rc); + + /* liblustre only support null flavor to MGS */ + obd->u.cli.cl_flvr_mgc.sf_rpc = SPTLRPC_FLVR_NULL; + + rc = obd_llog_init(obd, &obd->obd_olg, obd, NULL); + if (rc) { + CERROR("failed to setup llogging subsystems\n"); + GOTO(err_cleanup, rc); + } + + RETURN(rc); + +err_cleanup: + client_obd_cleanup(obd); +err_decref: + ptlrpcd_decref(); + RETURN(rc); +} + +static int mgc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage) +{ + int rc = 0; + ENTRY; + + switch (stage) { + case OBD_CLEANUP_EARLY: + case OBD_CLEANUP_EXPORTS: + obd_cleanup_client_import(obd); + rc = obd_llog_finish(obd, 0); + if (rc != 0) + CERROR("failed to cleanup llogging subsystems\n"); + break; + } + RETURN(rc); +} + +static int mgc_cleanup(struct obd_device *obd) +{ + struct client_obd *cli = &obd->u.cli; + int rc; + ENTRY; + + LASSERT(cli->cl_mgc_vfsmnt == NULL); + + ptlrpcd_decref(); + + rc = client_obd_cleanup(obd); + RETURN(rc); +} + +static int mgc_llog_init(struct obd_device *obd, struct obd_llog_group *olg, + struct obd_device *tgt, int *index) +{ + struct llog_ctxt *ctxt; + int rc; + ENTRY; + + LASSERT(olg == &obd->obd_olg); + rc = llog_setup(NULL, obd, olg, LLOG_CONFIG_REPL_CTXT, tgt, + &llog_client_ops); + if (rc < 0) + RETURN(rc); + + ctxt = llog_group_get_ctxt(olg, LLOG_CONFIG_REPL_CTXT); + llog_initiator_connect(ctxt); + llog_ctxt_put(ctxt); + + RETURN(rc); +} + +static int mgc_llog_finish(struct obd_device *obd, int count) +{ + struct llog_ctxt *ctxt; + + ENTRY; + + ctxt = llog_get_context(obd, LLOG_CONFIG_REPL_CTXT); + if (ctxt) + llog_cleanup(NULL, ctxt); + + RETURN(0); +} + +struct obd_ops mgc_obd_ops = { + .o_owner = THIS_MODULE, + .o_setup = mgc_setup, + .o_precleanup = mgc_precleanup, + .o_cleanup = mgc_cleanup, + .o_add_conn = client_import_add_conn, + .o_del_conn = client_import_del_conn, + .o_connect = client_connect_import, + .o_disconnect = client_disconnect_export, + .o_llog_init = mgc_llog_init, + .o_llog_finish = mgc_llog_finish, +}; + +int __init mgc_init(void) +{ + return class_register_type(&mgc_obd_ops, NULL, + NULL, LUSTRE_MGC_NAME, NULL); +} |