1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * cl code shared between vvp and liblustre (and other Lustre clients in the
40 #include <obd_class.h>
41 #include <obd_support.h>
43 #include <cl_object.h>
46 #include <lustre_lite.h>
49 /* Initialize the default and maximum LOV EA and cookie sizes. This allows
50 * us to make MDS RPCs with large enough reply buffers to hold the
51 * maximum-sized (= maximum striped) EA and cookie without having to
52 * calculate this (via a call into the LOV + OSCs) each time we make an RPC. */
53 int cl_init_ea_size(struct obd_export *md_exp, struct obd_export *dt_exp)
55 struct lov_stripe_md lsm = { .lsm_magic = LOV_MAGIC_V3 };
56 __u32 valsize = sizeof(struct lov_desc);
57 int rc, easize, def_easize, cookiesize;
62 rc = obd_get_info(dt_exp, sizeof(KEY_LOVDESC), KEY_LOVDESC,
63 &valsize, &desc, NULL);
67 stripes = min(desc.ld_tgt_count, (__u32)LOV_MAX_STRIPE_COUNT);
68 lsm.lsm_stripe_count = stripes;
69 easize = obd_size_diskmd(dt_exp, &lsm);
71 lsm.lsm_stripe_count = desc.ld_default_stripe_count;
72 def_easize = obd_size_diskmd(dt_exp, &lsm);
74 cookiesize = stripes * sizeof(struct llog_cookie);
76 CDEBUG(D_HA, "updating max_mdsize/max_cookiesize: %d/%d\n",
79 rc = md_init_ea_size(md_exp, easize, def_easize, cookiesize);
84 * This function is used as an upcall-callback hooked by liblustre and llite
85 * clients into obd_notify() listeners chain to handle notifications about
86 * change of import connect_flags. See llu_fsswop_mount() and
87 * lustre_common_fill_super().
89 int cl_ocd_update(struct obd_device *host,
90 struct obd_device *watched,
91 enum obd_notify_event ev, void *owner)
93 struct lustre_client_ocd *lco;
94 struct client_obd *cli;
99 if (!strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME)) {
100 cli = &watched->u.cli;
102 flags = cli->cl_import->imp_connect_data.ocd_connect_flags;
103 CDEBUG(D_SUPER, "Changing connect_flags: "LPX64" -> "LPX64"\n",
104 lco->lco_flags, flags);
105 spin_lock(&lco->lco_lock);
106 lco->lco_flags &= flags;
107 /* for each osc event update ea size */
109 cl_init_ea_size(lco->lco_md_exp, lco->lco_dt_exp);
111 spin_unlock(&lco->lco_lock);
114 CERROR("unexpected notification from %s %s!\n",
115 watched->obd_type->typ_name,
122 #define GROUPLOCK_SCOPE "grouplock"
124 int cl_get_grouplock(struct cl_object *obj, unsigned long gid, int nonblock,
125 struct ccc_grouplock *cg)
129 struct cl_lock *lock;
130 struct cl_lock_descr *descr;
135 env = cl_env_get(&refcheck);
139 io = &ccc_env_info(env)->cti_io;
142 rc = cl_io_init(env, io, CIT_MISC, io->ci_obj);
145 cl_env_put(env, &refcheck);
149 descr = &ccc_env_info(env)->cti_descr;
150 descr->cld_obj = obj;
151 descr->cld_start = 0;
152 descr->cld_end = CL_PAGE_EOF;
153 descr->cld_gid = gid;
154 descr->cld_mode = CLM_GROUP;
156 enqflags = CEF_MUST | (nonblock ? CEF_NONBLOCK : 0);
157 lock = cl_lock_request(env, io, descr, enqflags,
158 GROUPLOCK_SCOPE, cfs_current());
161 cl_env_put(env, &refcheck);
162 return PTR_ERR(lock);
165 cg->cg_env = cl_env_get(&refcheck);
168 LASSERT(cg->cg_env == env);
170 cl_env_unplant(env, &refcheck);
174 void cl_put_grouplock(struct ccc_grouplock *cg)
176 struct lu_env *env = cg->cg_env;
177 struct cl_lock *lock = cg->cg_lock;
183 cl_env_implant(env, &refcheck);
184 cl_env_put(env, &refcheck);
187 cl_lock_release(env, lock, GROUPLOCK_SCOPE, cfs_current());
188 cl_io_fini(env, &ccc_env_info(env)->cti_io);
189 cl_env_put(env, NULL);