4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2014, Intel Corporation.
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>
45 #include "llite_internal.h"
48 /* Initialize the default and maximum LOV EA and cookie sizes. This allows
49 * us to make MDS RPCs with large enough reply buffers to hold the
50 * maximum-sized (= maximum striped) EA and cookie without having to
51 * calculate this (via a call into the LOV + OSCs) each time we make an RPC. */
52 int cl_init_ea_size(struct obd_export *md_exp, struct obd_export *dt_exp)
54 struct lov_stripe_md lsm = { .lsm_magic = LOV_MAGIC_V3 };
55 __u32 valsize = sizeof(struct lov_desc);
56 int rc, easize, def_easize, cookiesize;
58 __u16 stripes, def_stripes;
61 rc = obd_get_info(NULL, dt_exp, sizeof(KEY_LOVDESC), KEY_LOVDESC,
62 &valsize, &desc, NULL);
66 stripes = min(desc.ld_tgt_count, (__u32)LOV_MAX_STRIPE_COUNT);
67 lsm.lsm_stripe_count = stripes;
68 easize = obd_size_diskmd(dt_exp, &lsm);
70 def_stripes = min_t(__u32, desc.ld_default_stripe_count,
71 LOV_MAX_STRIPE_COUNT);
72 lsm.lsm_stripe_count = def_stripes;
73 def_easize = obd_size_diskmd(dt_exp, &lsm);
75 cookiesize = stripes * sizeof(struct llog_cookie);
77 /* default cookiesize is 0 because from 2.4 server doesn't send
78 * llog cookies to client. */
80 "updating def/max_easize: %d/%d def/max_cookiesize: 0/%d\n",
81 def_easize, easize, cookiesize);
83 rc = md_init_ea_size(md_exp, easize, def_easize, cookiesize, 0);
88 * This function is used as an upcall-callback hooked by liblustre and llite
89 * clients into obd_notify() listeners chain to handle notifications about
90 * change of import connect_flags. See llu_fsswop_mount() and
91 * lustre_common_fill_super().
93 int cl_ocd_update(struct obd_device *host,
94 struct obd_device *watched,
95 enum obd_notify_event ev, void *owner, void *data)
97 struct lustre_client_ocd *lco;
98 struct client_obd *cli;
103 if (!strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME)) {
104 cli = &watched->u.cli;
106 flags = cli->cl_import->imp_connect_data.ocd_connect_flags;
107 CDEBUG(D_SUPER, "Changing connect_flags: "LPX64" -> "LPX64"\n",
108 lco->lco_flags, flags);
109 mutex_lock(&lco->lco_lock);
110 lco->lco_flags &= flags;
111 /* for each osc event update ea size */
113 cl_init_ea_size(lco->lco_md_exp, lco->lco_dt_exp);
115 mutex_unlock(&lco->lco_lock);
118 CERROR("unexpected notification from %s %s!\n",
119 watched->obd_type->typ_name,
126 #define GROUPLOCK_SCOPE "grouplock"
128 int cl_get_grouplock(struct cl_object *obj, unsigned long gid, int nonblock,
129 struct ccc_grouplock *cg)
133 struct cl_lock *lock;
134 struct cl_lock_descr *descr;
139 env = cl_env_get(&refcheck);
143 io = ccc_env_thread_io(env);
145 io->ci_ignore_layout = 1;
147 rc = cl_io_init(env, io, CIT_MISC, io->ci_obj);
150 cl_env_put(env, &refcheck);
151 /* Does not make sense to take GL for released layout */
157 lock = ccc_env_lock(env);
158 descr = &lock->cll_descr;
159 descr->cld_obj = obj;
160 descr->cld_start = 0;
161 descr->cld_end = CL_PAGE_EOF;
162 descr->cld_gid = gid;
163 descr->cld_mode = CLM_GROUP;
165 enqflags = CEF_MUST | (nonblock ? CEF_NONBLOCK : 0);
166 descr->cld_enq_flags = enqflags;
168 rc = cl_lock_request(env, io, lock);
171 cl_env_put(env, &refcheck);
175 cg->cg_env = cl_env_get(&refcheck);
179 LASSERT(cg->cg_env == env);
181 cl_env_unplant(env, &refcheck);
185 void cl_put_grouplock(struct ccc_grouplock *cg)
187 struct lu_env *env = cg->cg_env;
188 struct cl_io *io = cg->cg_io;
189 struct cl_lock *lock = cg->cg_lock;
195 cl_env_implant(env, &refcheck);
196 cl_env_put(env, &refcheck);
198 cl_lock_release(env, lock);
200 cl_env_put(env, NULL);