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.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2012, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * cl code shared between vvp and liblustre (and other Lustre clients in the
36 #include "../include/obd_class.h"
37 #include "../include/obd_support.h"
38 #include "../include/obd.h"
39 #include "../include/cl_object.h"
41 #include "../include/lustre_lite.h"
42 #include "llite_internal.h"
44 /* Initialize the default and maximum LOV EA and cookie sizes. This allows
45 * us to make MDS RPCs with large enough reply buffers to hold the
46 * maximum-sized (= maximum striped) EA and cookie without having to
47 * calculate this (via a call into the LOV + OSCs) each time we make an RPC.
49 int cl_init_ea_size(struct obd_export *md_exp, struct obd_export *dt_exp)
51 struct lov_stripe_md lsm = { .lsm_magic = LOV_MAGIC_V3 };
52 __u32 valsize = sizeof(struct lov_desc);
53 int rc, easize, def_easize, cookiesize;
55 __u16 stripes, def_stripes;
57 rc = obd_get_info(NULL, dt_exp, sizeof(KEY_LOVDESC), KEY_LOVDESC,
58 &valsize, &desc, NULL);
62 stripes = min_t(__u32, desc.ld_tgt_count, LOV_MAX_STRIPE_COUNT);
63 lsm.lsm_stripe_count = stripes;
64 easize = obd_size_diskmd(dt_exp, &lsm);
66 def_stripes = min_t(__u32, desc.ld_default_stripe_count,
67 LOV_MAX_STRIPE_COUNT);
68 lsm.lsm_stripe_count = def_stripes;
69 def_easize = obd_size_diskmd(dt_exp, &lsm);
71 cookiesize = stripes * sizeof(struct llog_cookie);
73 /* default cookiesize is 0 because from 2.4 server doesn't send
74 * llog cookies to client.
77 "updating def/max_easize: %d/%d def/max_cookiesize: 0/%d\n",
78 def_easize, easize, cookiesize);
80 rc = md_init_ea_size(md_exp, easize, def_easize, cookiesize, 0);
85 * This function is used as an upcall-callback hooked by liblustre and llite
86 * clients into obd_notify() listeners chain to handle notifications about
87 * change of import connect_flags. See llu_fsswop_mount() and
88 * lustre_common_fill_super().
90 int cl_ocd_update(struct obd_device *host,
91 struct obd_device *watched,
92 enum obd_notify_event ev, void *owner, void *data)
94 struct lustre_client_ocd *lco;
95 struct client_obd *cli;
99 if (!strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME) &&
100 watched->obd_set_up && !watched->obd_stopping) {
101 cli = &watched->u.cli;
103 flags = cli->cl_import->imp_connect_data.ocd_connect_flags;
104 CDEBUG(D_SUPER, "Changing connect_flags: %#llx -> %#llx\n",
105 lco->lco_flags, flags);
106 mutex_lock(&lco->lco_lock);
107 lco->lco_flags &= flags;
108 /* for each osc event update ea size */
110 cl_init_ea_size(lco->lco_md_exp, lco->lco_dt_exp);
112 mutex_unlock(&lco->lco_lock);
115 CERROR("unexpected notification from %s %s (setup:%d,stopping:%d)!\n",
116 watched->obd_type->typ_name,
117 watched->obd_name, watched->obd_set_up,
118 watched->obd_stopping);
124 #define GROUPLOCK_SCOPE "grouplock"
126 int cl_get_grouplock(struct cl_object *obj, unsigned long gid, int nonblock,
127 struct ll_grouplock *cg)
131 struct cl_lock *lock;
132 struct cl_lock_descr *descr;
137 env = cl_env_get(&refcheck);
141 io = vvp_env_thread_io(env);
143 io->ci_ignore_layout = 1;
145 rc = cl_io_init(env, io, CIT_MISC, io->ci_obj);
148 cl_env_put(env, &refcheck);
149 /* Does not make sense to take GL for released layout */
155 lock = vvp_env_lock(env);
156 descr = &lock->cll_descr;
157 descr->cld_obj = obj;
158 descr->cld_start = 0;
159 descr->cld_end = CL_PAGE_EOF;
160 descr->cld_gid = gid;
161 descr->cld_mode = CLM_GROUP;
163 enqflags = CEF_MUST | (nonblock ? CEF_NONBLOCK : 0);
164 descr->cld_enq_flags = enqflags;
166 rc = cl_lock_request(env, io, lock);
169 cl_env_put(env, &refcheck);
173 cg->lg_env = cl_env_get(&refcheck);
177 LASSERT(cg->lg_env == env);
179 cl_env_unplant(env, &refcheck);
183 void cl_put_grouplock(struct ll_grouplock *cg)
185 struct lu_env *env = cg->lg_env;
186 struct cl_io *io = cg->lg_io;
187 struct cl_lock *lock = cg->lg_lock;
193 cl_env_implant(env, &refcheck);
194 cl_env_put(env, &refcheck);
196 cl_lock_release(env, lock);
198 cl_env_put(env, NULL);