diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/lclient/lcommon_misc.c')
| -rw-r--r-- | drivers/staging/lustre/lustre/lclient/lcommon_misc.c | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/lclient/lcommon_misc.c b/drivers/staging/lustre/lustre/lclient/lcommon_misc.c new file mode 100644 index 000000000000..8ecbef92753d --- /dev/null +++ b/drivers/staging/lustre/lustre/lclient/lcommon_misc.c @@ -0,0 +1,194 @@ +/* + * GPL HEADER START + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 only, + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License version 2 for more details (a copy is included + * in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU General Public License + * version 2 along with this program; If not, see + * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + * GPL HEADER END + */ +/* + * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. + * Use is subject to license terms. + * + * Copyright (c) 2011, 2012, Intel Corporation. + */ +/* + * This file is part of Lustre, http://www.lustre.org/ + * Lustre is a trademark of Sun Microsystems, Inc. + * + * cl code shared between vvp and liblustre (and other Lustre clients in the + * future). + * + */ +#include <obd_class.h> +#include <obd_support.h> +#include <obd.h> +#include <cl_object.h> +#include <lclient.h> + +#include <lustre_lite.h> + + +/* Initialize the default and maximum LOV EA and cookie sizes. This allows + * us to make MDS RPCs with large enough reply buffers to hold the + * maximum-sized (= maximum striped) EA and cookie without having to + * calculate this (via a call into the LOV + OSCs) each time we make an RPC. */ +int cl_init_ea_size(struct obd_export *md_exp, struct obd_export *dt_exp) +{ + struct lov_stripe_md lsm = { .lsm_magic = LOV_MAGIC_V3 }; + __u32 valsize = sizeof(struct lov_desc); + int rc, easize, def_easize, cookiesize; + struct lov_desc desc; + __u16 stripes; + ENTRY; + + rc = obd_get_info(NULL, dt_exp, sizeof(KEY_LOVDESC), KEY_LOVDESC, + &valsize, &desc, NULL); + if (rc) + RETURN(rc); + + stripes = min(desc.ld_tgt_count, (__u32)LOV_MAX_STRIPE_COUNT); + lsm.lsm_stripe_count = stripes; + easize = obd_size_diskmd(dt_exp, &lsm); + + lsm.lsm_stripe_count = desc.ld_default_stripe_count; + def_easize = obd_size_diskmd(dt_exp, &lsm); + + cookiesize = stripes * sizeof(struct llog_cookie); + + CDEBUG(D_HA, "updating max_mdsize/max_cookiesize: %d/%d\n", + easize, cookiesize); + + rc = md_init_ea_size(md_exp, easize, def_easize, cookiesize); + RETURN(rc); +} + +/** + * This function is used as an upcall-callback hooked by liblustre and llite + * clients into obd_notify() listeners chain to handle notifications about + * change of import connect_flags. See llu_fsswop_mount() and + * lustre_common_fill_super(). + */ +int cl_ocd_update(struct obd_device *host, + struct obd_device *watched, + enum obd_notify_event ev, void *owner, void *data) +{ + struct lustre_client_ocd *lco; + struct client_obd *cli; + __u64 flags; + int result; + + ENTRY; + if (!strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME)) { + cli = &watched->u.cli; + lco = owner; + flags = cli->cl_import->imp_connect_data.ocd_connect_flags; + CDEBUG(D_SUPER, "Changing connect_flags: "LPX64" -> "LPX64"\n", + lco->lco_flags, flags); + mutex_lock(&lco->lco_lock); + lco->lco_flags &= flags; + /* for each osc event update ea size */ + if (lco->lco_dt_exp) + cl_init_ea_size(lco->lco_md_exp, lco->lco_dt_exp); + + mutex_unlock(&lco->lco_lock); + result = 0; + } else { + CERROR("unexpected notification from %s %s!\n", + watched->obd_type->typ_name, + watched->obd_name); + result = -EINVAL; + } + RETURN(result); +} + +#define GROUPLOCK_SCOPE "grouplock" + +int cl_get_grouplock(struct cl_object *obj, unsigned long gid, int nonblock, + struct ccc_grouplock *cg) +{ + struct lu_env *env; + struct cl_io *io; + struct cl_lock *lock; + struct cl_lock_descr *descr; + __u32 enqflags; + int refcheck; + int rc; + + env = cl_env_get(&refcheck); + if (IS_ERR(env)) + return PTR_ERR(env); + + io = ccc_env_thread_io(env); + io->ci_obj = obj; + io->ci_ignore_layout = 1; + + rc = cl_io_init(env, io, CIT_MISC, io->ci_obj); + if (rc) { + LASSERT(rc < 0); + cl_env_put(env, &refcheck); + return rc; + } + + descr = &ccc_env_info(env)->cti_descr; + descr->cld_obj = obj; + descr->cld_start = 0; + descr->cld_end = CL_PAGE_EOF; + descr->cld_gid = gid; + descr->cld_mode = CLM_GROUP; + + enqflags = CEF_MUST | (nonblock ? CEF_NONBLOCK : 0); + descr->cld_enq_flags = enqflags; + + lock = cl_lock_request(env, io, descr, GROUPLOCK_SCOPE, current); + if (IS_ERR(lock)) { + cl_io_fini(env, io); + cl_env_put(env, &refcheck); + return PTR_ERR(lock); + } + + cg->cg_env = cl_env_get(&refcheck); + cg->cg_io = io; + cg->cg_lock = lock; + cg->cg_gid = gid; + LASSERT(cg->cg_env == env); + + cl_env_unplant(env, &refcheck); + return 0; +} + +void cl_put_grouplock(struct ccc_grouplock *cg) +{ + struct lu_env *env = cg->cg_env; + struct cl_io *io = cg->cg_io; + struct cl_lock *lock = cg->cg_lock; + int refcheck; + + LASSERT(cg->cg_env); + LASSERT(cg->cg_gid); + + cl_env_implant(env, &refcheck); + cl_env_put(env, &refcheck); + + cl_unuse(env, lock); + cl_lock_release(env, lock, GROUPLOCK_SCOPE, current); + cl_io_fini(env, io); + cl_env_put(env, NULL); +} |