1/* 2 * GPL HEADER START 3 * 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 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. 9 * 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). 15 * 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 19 * 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 22 * have any questions. 23 * 24 * GPL HEADER END 25 */ 26/* 27 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. 28 * Use is subject to license terms. 29 * 30 * Copyright (c) 2011, 2012, Intel Corporation. 31 */ 32/* 33 * This file is part of Lustre, http://www.lustre.org/ 34 * Lustre is a trademark of Sun Microsystems, Inc. 35 * 36 * cl code shared between vvp and liblustre (and other Lustre clients in the 37 * future). 38 * 39 */ 40#include "../include/obd_class.h" 41#include "../include/obd_support.h" 42#include "../include/obd.h" 43#include "../include/cl_object.h" 44#include "../include/lclient.h" 45 46#include "../include/lustre_lite.h" 47 48 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. */ 53int cl_init_ea_size(struct obd_export *md_exp, struct obd_export *dt_exp) 54{ 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; 58 struct lov_desc desc; 59 __u16 stripes, def_stripes; 60 61 rc = obd_get_info(NULL, dt_exp, sizeof(KEY_LOVDESC), KEY_LOVDESC, 62 &valsize, &desc, NULL); 63 if (rc) 64 return rc; 65 66 stripes = min_t(__u32, desc.ld_tgt_count, LOV_MAX_STRIPE_COUNT); 67 lsm.lsm_stripe_count = stripes; 68 easize = obd_size_diskmd(dt_exp, &lsm); 69 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); 74 75 cookiesize = stripes * sizeof(struct llog_cookie); 76 77 /* default cookiesize is 0 because from 2.4 server doesn't send 78 * llog cookies to client. */ 79 CDEBUG(D_HA, 80 "updating def/max_easize: %d/%d def/max_cookiesize: 0/%d\n", 81 def_easize, easize, cookiesize); 82 83 rc = md_init_ea_size(md_exp, easize, def_easize, cookiesize, 0); 84 return rc; 85} 86 87/** 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(). 92 */ 93int cl_ocd_update(struct obd_device *host, 94 struct obd_device *watched, 95 enum obd_notify_event ev, void *owner, void *data) 96{ 97 struct lustre_client_ocd *lco; 98 struct client_obd *cli; 99 __u64 flags; 100 int result; 101 102 if (!strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME)) { 103 cli = &watched->u.cli; 104 lco = owner; 105 flags = cli->cl_import->imp_connect_data.ocd_connect_flags; 106 CDEBUG(D_SUPER, "Changing connect_flags: %#llx -> %#llx\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 */ 111 if (lco->lco_dt_exp) 112 cl_init_ea_size(lco->lco_md_exp, lco->lco_dt_exp); 113 114 mutex_unlock(&lco->lco_lock); 115 result = 0; 116 } else { 117 CERROR("unexpected notification from %s %s!\n", 118 watched->obd_type->typ_name, 119 watched->obd_name); 120 result = -EINVAL; 121 } 122 return result; 123} 124 125#define GROUPLOCK_SCOPE "grouplock" 126 127int cl_get_grouplock(struct cl_object *obj, unsigned long gid, int nonblock, 128 struct ccc_grouplock *cg) 129{ 130 struct lu_env *env; 131 struct cl_io *io; 132 struct cl_lock *lock; 133 struct cl_lock_descr *descr; 134 __u32 enqflags; 135 int refcheck; 136 int rc; 137 138 env = cl_env_get(&refcheck); 139 if (IS_ERR(env)) 140 return PTR_ERR(env); 141 142 io = ccc_env_thread_io(env); 143 io->ci_obj = obj; 144 io->ci_ignore_layout = 1; 145 146 rc = cl_io_init(env, io, CIT_MISC, io->ci_obj); 147 if (rc) { 148 /* Does not make sense to take GL for released layout */ 149 if (rc > 0) 150 rc = -ENOTSUPP; 151 cl_env_put(env, &refcheck); 152 return rc; 153 } 154 155 descr = &ccc_env_info(env)->cti_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; 161 162 enqflags = CEF_MUST | (nonblock ? CEF_NONBLOCK : 0); 163 descr->cld_enq_flags = enqflags; 164 165 lock = cl_lock_request(env, io, descr, GROUPLOCK_SCOPE, current); 166 if (IS_ERR(lock)) { 167 cl_io_fini(env, io); 168 cl_env_put(env, &refcheck); 169 return PTR_ERR(lock); 170 } 171 172 cg->cg_env = cl_env_get(&refcheck); 173 cg->cg_io = io; 174 cg->cg_lock = lock; 175 cg->cg_gid = gid; 176 LASSERT(cg->cg_env == env); 177 178 cl_env_unplant(env, &refcheck); 179 return 0; 180} 181 182void cl_put_grouplock(struct ccc_grouplock *cg) 183{ 184 struct lu_env *env = cg->cg_env; 185 struct cl_io *io = cg->cg_io; 186 struct cl_lock *lock = cg->cg_lock; 187 int refcheck; 188 189 LASSERT(cg->cg_env); 190 LASSERT(cg->cg_gid); 191 192 cl_env_implant(env, &refcheck); 193 cl_env_put(env, &refcheck); 194 195 cl_unuse(env, lock); 196 cl_lock_release(env, lock, GROUPLOCK_SCOPE, current); 197 cl_io_fini(env, io); 198 cl_env_put(env, NULL); 199} 200