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"
47 /* Initialize the default and maximum LOV EA and cookie sizes. This allows
48 * us to make MDS RPCs with large enough reply buffers to hold the
49 * maximum-sized (= maximum striped) EA and cookie without having to
50 * calculate this (via a call into the LOV + OSCs) each time we make an RPC. */
51 static int cl_init_ea_size(struct obd_export *md_exp, struct obd_export *dt_exp)
53 struct lov_stripe_md lsm = { .lsm_magic = LOV_MAGIC_V3 };
54 __u32 valsize = sizeof(struct lov_desc);
55 int rc, easize, def_easize, cookiesize;
57 __u16 stripes, def_stripes;
60 rc = obd_get_info(NULL, dt_exp, sizeof(KEY_LOVDESC), KEY_LOVDESC,
61 &valsize, &desc, NULL);
65 stripes = min(desc.ld_tgt_count, (__u32)LOV_MAX_STRIPE_COUNT);
66 lsm.lsm_stripe_count = stripes;
67 easize = obd_size_diskmd(dt_exp, &lsm);
69 def_stripes = min_t(__u32, desc.ld_default_stripe_count,
70 LOV_MAX_STRIPE_COUNT);
71 lsm.lsm_stripe_count = def_stripes;
72 def_easize = obd_size_diskmd(dt_exp, &lsm);
74 cookiesize = stripes * sizeof(struct llog_cookie);
76 /* default cookiesize is 0 because from 2.4 server doesn't send
77 * llog cookies to client. */
79 "updating def/max_easize: %d/%d def/max_cookiesize: 0/%d\n",
80 def_easize, easize, cookiesize);
82 rc = md_init_ea_size(md_exp, easize, def_easize, cookiesize, 0);
87 * This function is used as an upcall-callback hooked by liblustre and llite
88 * clients into obd_notify() listeners chain to handle notifications about
89 * change of import connect_flags. See llu_fsswop_mount() and
90 * lustre_common_fill_super().
92 int cl_ocd_update(struct obd_device *host,
93 struct obd_device *watched,
94 enum obd_notify_event ev, void *owner, void *data)
96 struct lustre_client_ocd *lco;
97 struct client_obd *cli;
102 if (!strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME)) {
103 cli = &watched->u.cli;
105 flags = cli->cl_import->imp_connect_data.ocd_connect_flags;
106 CDEBUG(D_SUPER, "Changing connect_flags: "LPX64" -> "LPX64"\n",
107 lco->lco_flags, flags);
108 mutex_lock(&lco->lco_lock);
109 lco->lco_flags &= flags;
110 /* for each osc event update ea size */
112 cl_init_ea_size(lco->lco_md_exp, lco->lco_dt_exp);
114 mutex_unlock(&lco->lco_lock);
117 CERROR("unexpected notification from %s %s!\n",
118 watched->obd_type->typ_name,
125 #define GROUPLOCK_SCOPE "grouplock"
127 int cl_get_grouplock(struct cl_object *obj, unsigned long gid, int nonblock,
128 struct ll_grouplock *lg)
132 struct cl_lock *lock;
133 struct cl_lock_descr *descr;
138 env = cl_env_get(&refcheck);
142 io = vvp_env_thread_io(env);
144 io->ci_ignore_layout = 1;
146 rc = cl_io_init(env, io, CIT_MISC, io->ci_obj);
149 cl_env_put(env, &refcheck);
150 /* Does not make sense to take GL for released layout */
156 lock = vvp_env_lock(env);
157 descr = &lock->cll_descr;
158 descr->cld_obj = obj;
159 descr->cld_start = 0;
160 descr->cld_end = CL_PAGE_EOF;
161 descr->cld_gid = gid;
162 descr->cld_mode = CLM_GROUP;
164 enqflags = CEF_MUST | (nonblock ? CEF_NONBLOCK : 0);
165 descr->cld_enq_flags = enqflags;
167 rc = cl_lock_request(env, io, lock);
170 cl_env_put(env, &refcheck);
174 lg->lg_env = cl_env_get(&refcheck);
178 LASSERT(lg->lg_env == env);
180 cl_env_unplant(env, &refcheck);
184 void cl_put_grouplock(struct ll_grouplock *lg)
186 struct lu_env *env = lg->lg_env;
187 struct cl_io *io = lg->lg_io;
188 struct cl_lock *lock = lg->lg_lock;
191 LASSERT(lg->lg_env != NULL);
192 LASSERT(lg->lg_gid != 0);
194 cl_env_implant(env, &refcheck);
195 cl_env_put(env, &refcheck);
197 cl_lock_release(env, lock);
199 cl_env_put(env, NULL);