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 (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
32 * Copyright (c) 2011, 2012, Whamcloud, Inc.
35 * This file is part of Lustre, http://www.lustre.org/
36 * Lustre is a trademark of Sun Microsystems, Inc.
38 * cl code shared between vvp and liblustre (and other Lustre clients in the
42 #include <obd_class.h>
43 #include <obd_support.h>
45 #include <cl_object.h>
48 #include <lustre_lite.h>
51 /* Initialize the default and maximum LOV EA and cookie sizes. This allows
52 * us to make MDS RPCs with large enough reply buffers to hold the
53 * maximum-sized (= maximum striped) EA and cookie without having to
54 * calculate this (via a call into the LOV + OSCs) each time we make an RPC. */
55 int cl_init_ea_size(struct obd_export *md_exp, struct obd_export *dt_exp)
57 struct lov_stripe_md lsm = { .lsm_magic = LOV_MAGIC_V3 };
58 __u32 valsize = sizeof(struct lov_desc);
59 int rc, easize, def_easize, cookiesize;
64 rc = obd_get_info(dt_exp, sizeof(KEY_LOVDESC), KEY_LOVDESC,
65 &valsize, &desc, NULL);
69 stripes = min(desc.ld_tgt_count, (__u32)LOV_MAX_STRIPE_COUNT);
70 lsm.lsm_stripe_count = stripes;
71 easize = obd_size_diskmd(dt_exp, &lsm);
73 lsm.lsm_stripe_count = desc.ld_default_stripe_count;
74 def_easize = obd_size_diskmd(dt_exp, &lsm);
76 cookiesize = stripes * sizeof(struct llog_cookie);
78 CDEBUG(D_HA, "updating max_mdsize/max_cookiesize: %d/%d\n",
81 rc = md_init_ea_size(md_exp, easize, def_easize, cookiesize);
86 * This function is used as an upcall-callback hooked by liblustre and llite
87 * clients into obd_notify() listeners chain to handle notifications about
88 * change of import connect_flags. See llu_fsswop_mount() and
89 * lustre_common_fill_super().
91 int cl_ocd_update(struct obd_device *host,
92 struct obd_device *watched,
93 enum obd_notify_event ev, void *owner, void *data)
95 struct lustre_client_ocd *lco;
96 struct client_obd *cli;
101 if (!strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME)) {
102 cli = &watched->u.cli;
104 flags = cli->cl_import->imp_connect_data.ocd_connect_flags;
105 CDEBUG(D_SUPER, "Changing connect_flags: "LPX64" -> "LPX64"\n",
106 lco->lco_flags, flags);
107 cfs_mutex_down(&lco->lco_lock);
108 lco->lco_flags &= flags;
109 /* for each osc event update ea size */
111 cl_init_ea_size(lco->lco_md_exp, lco->lco_dt_exp);
113 cfs_mutex_up(&lco->lco_lock);
116 CERROR("unexpected notification from %s %s!\n",
117 watched->obd_type->typ_name,
124 #define GROUPLOCK_SCOPE "grouplock"
126 int cl_get_grouplock(struct cl_object *obj, unsigned long gid, int nonblock,
127 struct ccc_grouplock *cg)
131 struct cl_lock *lock;
132 struct cl_lock_descr *descr;
137 env = cl_env_get(&refcheck);
141 io = ccc_env_thread_io(env);
144 rc = cl_io_init(env, io, CIT_MISC, io->ci_obj);
147 cl_env_put(env, &refcheck);
151 descr = &ccc_env_info(env)->cti_descr;
152 descr->cld_obj = obj;
153 descr->cld_start = 0;
154 descr->cld_end = CL_PAGE_EOF;
155 descr->cld_gid = gid;
156 descr->cld_mode = CLM_GROUP;
158 enqflags = CEF_MUST | (nonblock ? CEF_NONBLOCK : 0);
159 descr->cld_enq_flags = enqflags;
161 lock = cl_lock_request(env, io, descr, GROUPLOCK_SCOPE, cfs_current());
164 cl_env_put(env, &refcheck);
165 return PTR_ERR(lock);
168 cg->cg_env = cl_env_get(&refcheck);
172 LASSERT(cg->cg_env == env);
174 cl_env_unplant(env, &refcheck);
178 void cl_put_grouplock(struct ccc_grouplock *cg)
180 struct lu_env *env = cg->cg_env;
181 struct cl_io *io = cg->cg_io;
182 struct cl_lock *lock = cg->cg_lock;
188 cl_env_implant(env, &refcheck);
189 cl_env_put(env, &refcheck);
192 cl_lock_release(env, lock, GROUPLOCK_SCOPE, cfs_current());
194 cl_env_put(env, NULL);