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, 2012, 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>
46 #include <lustre_lite.h>
49 /* Initialize the default and maximum LOV EA and cookie sizes. This allows
50 * us to make MDS RPCs with large enough reply buffers to hold the
51 * maximum-sized (= maximum striped) EA and cookie without having to
52 * calculate this (via a call into the LOV + OSCs) each time we make an RPC. */
53 int cl_init_ea_size(struct obd_export
*md_exp
, struct obd_export
*dt_exp
)
55 struct lov_stripe_md lsm
= { .lsm_magic
= LOV_MAGIC_V3
};
56 __u32 valsize
= sizeof(struct lov_desc
);
57 int rc
, easize
, def_easize
, cookiesize
;
62 rc
= obd_get_info(NULL
, dt_exp
, sizeof(KEY_LOVDESC
), KEY_LOVDESC
,
63 &valsize
, &desc
, NULL
);
67 stripes
= min(desc
.ld_tgt_count
, (__u32
)LOV_MAX_STRIPE_COUNT
);
68 lsm
.lsm_stripe_count
= stripes
;
69 easize
= obd_size_diskmd(dt_exp
, &lsm
);
71 lsm
.lsm_stripe_count
= desc
.ld_default_stripe_count
;
72 def_easize
= obd_size_diskmd(dt_exp
, &lsm
);
74 cookiesize
= stripes
* sizeof(struct llog_cookie
);
76 CDEBUG(D_HA
, "updating max_mdsize/max_cookiesize: %d/%d\n",
79 rc
= md_init_ea_size(md_exp
, easize
, def_easize
, cookiesize
);
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
;
99 if (!strcmp(watched
->obd_type
->typ_name
, LUSTRE_OSC_NAME
)) {
100 cli
= &watched
->u
.cli
;
102 flags
= cli
->cl_import
->imp_connect_data
.ocd_connect_flags
;
103 CDEBUG(D_SUPER
, "Changing connect_flags: "LPX64
" -> "LPX64
"\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!\n",
115 watched
->obd_type
->typ_name
,
122 #define GROUPLOCK_SCOPE "grouplock"
124 int cl_get_grouplock(struct cl_object
*obj
, unsigned long gid
, int nonblock
,
125 struct ccc_grouplock
*cg
)
129 struct cl_lock
*lock
;
130 struct cl_lock_descr
*descr
;
135 env
= cl_env_get(&refcheck
);
139 io
= ccc_env_thread_io(env
);
141 io
->ci_ignore_layout
= 1;
143 rc
= cl_io_init(env
, io
, CIT_MISC
, io
->ci_obj
);
146 cl_env_put(env
, &refcheck
);
150 descr
= &ccc_env_info(env
)->cti_descr
;
151 descr
->cld_obj
= obj
;
152 descr
->cld_start
= 0;
153 descr
->cld_end
= CL_PAGE_EOF
;
154 descr
->cld_gid
= gid
;
155 descr
->cld_mode
= CLM_GROUP
;
157 enqflags
= CEF_MUST
| (nonblock
? CEF_NONBLOCK
: 0);
158 descr
->cld_enq_flags
= enqflags
;
160 lock
= cl_lock_request(env
, io
, descr
, GROUPLOCK_SCOPE
, current
);
163 cl_env_put(env
, &refcheck
);
164 return PTR_ERR(lock
);
167 cg
->cg_env
= cl_env_get(&refcheck
);
171 LASSERT(cg
->cg_env
== env
);
173 cl_env_unplant(env
, &refcheck
);
177 void cl_put_grouplock(struct ccc_grouplock
*cg
)
179 struct lu_env
*env
= cg
->cg_env
;
180 struct cl_io
*io
= cg
->cg_io
;
181 struct cl_lock
*lock
= cg
->cg_lock
;
187 cl_env_implant(env
, &refcheck
);
188 cl_env_put(env
, &refcheck
);
191 cl_lock_release(env
, lock
, GROUPLOCK_SCOPE
, current
);
193 cl_env_put(env
, NULL
);
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