--- /dev/null
+/*
+ * 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 "../include/obd_class.h"
+#include "../include/obd_support.h"
+#include "../include/obd.h"
+#include "../include/cl_object.h"
+#include "../include/lclient.h"
+
+#include "../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, def_stripes;
+
+ rc = obd_get_info(NULL, dt_exp, sizeof(KEY_LOVDESC), KEY_LOVDESC,
+ &valsize, &desc, NULL);
+ if (rc)
+ return rc;
+
+ stripes = min_t(__u32, desc.ld_tgt_count, LOV_MAX_STRIPE_COUNT);
+ lsm.lsm_stripe_count = stripes;
+ easize = obd_size_diskmd(dt_exp, &lsm);
+
+ def_stripes = min_t(__u32, desc.ld_default_stripe_count,
+ LOV_MAX_STRIPE_COUNT);
+ lsm.lsm_stripe_count = def_stripes;
+ def_easize = obd_size_diskmd(dt_exp, &lsm);
+
+ cookiesize = stripes * sizeof(struct llog_cookie);
+
+ /* default cookiesize is 0 because from 2.4 server doesn't send
+ * llog cookies to client. */
+ CDEBUG(D_HA,
+ "updating def/max_easize: %d/%d def/max_cookiesize: 0/%d\n",
+ def_easize, easize, cookiesize);
+
+ rc = md_init_ea_size(md_exp, easize, def_easize, cookiesize, 0);
+ 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;
+
+ 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: %#llx -> %#llx\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) {
+ /* Does not make sense to take GL for released layout */
+ if (rc > 0)
+ rc = -ENOTSUPP;
+ 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);
+}
Code Review / kvmfornfv.git / blobdiff