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 "llite_internal.h"
43 /* Initialize the default and maximum LOV EA and cookie sizes. This allows
44 * us to make MDS RPCs with large enough reply buffers to hold the
45 * maximum-sized (= maximum striped) EA and cookie without having to
46 * calculate this (via a call into the LOV + OSCs) each time we make an RPC.
48 int cl_init_ea_size(struct obd_export *md_exp, struct obd_export *dt_exp)
50 struct lov_stripe_md lsm = { .lsm_magic = LOV_MAGIC_V3 };
51 __u32 valsize = sizeof(struct lov_desc);
52 int rc, easize, def_easize, cookiesize;
54 __u16 stripes, def_stripes;
56 rc = obd_get_info(NULL, dt_exp, sizeof(KEY_LOVDESC), KEY_LOVDESC,
57 &valsize, &desc, NULL);
61 stripes = min_t(__u32, desc.ld_tgt_count, LOV_MAX_STRIPE_COUNT);
62 lsm.lsm_stripe_count = stripes;
63 easize = obd_size_diskmd(dt_exp, &lsm);
65 def_stripes = min_t(__u32, desc.ld_default_stripe_count,
66 LOV_MAX_STRIPE_COUNT);
67 lsm.lsm_stripe_count = def_stripes;
68 def_easize = obd_size_diskmd(dt_exp, &lsm);
70 cookiesize = stripes * sizeof(struct llog_cookie);
72 /* default cookiesize is 0 because from 2.4 server doesn't send
73 * llog cookies to client.
76 "updating def/max_easize: %d/%d def/max_cookiesize: 0/%d\n",
77 def_easize, easize, cookiesize);
79 rc = md_init_ea_size(md_exp, easize, def_easize, cookiesize, 0);
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, void *data)
93 struct lustre_client_ocd *lco;
94 struct client_obd *cli;
98 if (!strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME) &&
99 watched->obd_set_up && !watched->obd_stopping) {
100 cli = &watched->u.cli;
102 flags = cli->cl_import->imp_connect_data.ocd_connect_flags;
103 CDEBUG(D_SUPER, "Changing connect_flags: %#llx -> %#llx\n",
104 lco->lco_flags, flags);
105 mutex_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 mutex_unlock(&lco->lco_lock);
114 CERROR("unexpected notification from %s %s (setup:%d,stopping:%d)!\n",
115 watched->obd_type->typ_name,
116 watched->obd_name, watched->obd_set_up,
117 watched->obd_stopping);
123 #define GROUPLOCK_SCOPE "grouplock"
125 int cl_get_grouplock(struct cl_object *obj, unsigned long gid, int nonblock,
126 struct ll_grouplock *cg)
130 struct cl_lock *lock;
131 struct cl_lock_descr *descr;
136 env = cl_env_get(&refcheck);
140 io = vvp_env_thread_io(env);
142 io->ci_ignore_layout = 1;
144 rc = cl_io_init(env, io, CIT_MISC, io->ci_obj);
147 cl_env_put(env, &refcheck);
148 /* Does not make sense to take GL for released layout */
154 lock = vvp_env_lock(env);
155 descr = &lock->cll_descr;
156 descr->cld_obj = obj;
157 descr->cld_start = 0;
158 descr->cld_end = CL_PAGE_EOF;
159 descr->cld_gid = gid;
160 descr->cld_mode = CLM_GROUP;
162 enqflags = CEF_MUST | (nonblock ? CEF_NONBLOCK : 0);
163 descr->cld_enq_flags = enqflags;
165 rc = cl_lock_request(env, io, lock);
168 cl_env_put(env, &refcheck);
172 cg->lg_env = cl_env_get(&refcheck);
176 LASSERT(cg->lg_env == env);
178 cl_env_unplant(env, &refcheck);
182 void cl_put_grouplock(struct ll_grouplock *cg)
184 struct lu_env *env = cg->lg_env;
185 struct cl_io *io = cg->lg_io;
186 struct cl_lock *lock = cg->lg_lock;
192 cl_env_implant(env, &refcheck);
193 cl_env_put(env, &refcheck);
195 cl_lock_release(env, lock);
197 cl_env_put(env, NULL);