--- /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 COPYING file that accompanied this code.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2012, Intel, Inc.
+ *
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/lod/lod_dev.c
+ *
+ * Lustre Logical Object Device
+ *
+ * Author: Alex Zhuravlev <alexey.zhuravlev@intel.com>
+ * Author: Mikhail Pershin <mike.pershin@intel.com>
+ */
+
+#ifndef EXPORT_SYMTAB
+# define EXPORT_SYMTAB
+#endif
+#define DEBUG_SUBSYSTEM S_MDS
+
+#include <obd_class.h>
+#include <lustre_param.h>
+
+#include "lod_internal.h"
+
+/* Slab for OSD object allocation */
+cfs_mem_cache_t *lod_object_kmem;
+
+static struct lu_kmem_descr lod_caches[] = {
+ {
+ .ckd_cache = &lod_object_kmem,
+ .ckd_name = "lod_obj",
+ .ckd_size = sizeof(struct lod_object)
+ },
+ {
+ .ckd_cache = NULL
+ }
+};
+
+static int lod_process_config(const struct lu_env *env,
+ struct lu_device *dev,
+ struct lustre_cfg *lcfg)
+{
+ struct lod_device *lod = lu2lod_dev(dev);
+ struct lu_device *next = &lod->lod_child->dd_lu_dev;
+ char *arg1;
+ int rc, i;
+ ENTRY;
+
+ switch(lcfg->lcfg_command) {
+
+ case LCFG_LOV_DEL_OBD:
+ case LCFG_LOV_ADD_INA:
+ case LCFG_LOV_ADD_OBD: {
+ __u32 index;
+ int gen;
+ /* lov_modify_tgts add 0:lov_mdsA 1:osp 2:0 3:1 */
+ arg1 = lustre_cfg_string(lcfg, 1);
+
+ if (sscanf(lustre_cfg_buf(lcfg, 2), "%d", &index) != 1)
+ GOTO(out, rc = -EINVAL);
+ if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", &gen) != 1)
+ GOTO(out, rc = -EINVAL);
+
+ rc = -EINVAL;
+ break;
+ }
+
+ case LCFG_PARAM: {
+ struct lprocfs_static_vars v = { 0 };
+ struct obd_device *obd = lod2obd(lod);
+
+ rc = class_process_proc_param(PARAM_LOV, v.obd_vars, lcfg, obd);
+ if (rc > 0)
+ rc = 0;
+ GOTO(out, rc);
+ }
+
+ case LCFG_CLEANUP:
+ lu_dev_del_linkage(dev->ld_site, dev);
+ lod_getref(lod);
+ lod_foreach_ost(lod, i) {
+ struct lod_ost_desc *ost;
+ ost = OST_TGT(lod, i);
+ LASSERT(ost && ost->ltd_ost);
+ next = &ost->ltd_ost->dd_lu_dev;
+ rc = next->ld_ops->ldo_process_config(env, next, lcfg);
+ if (rc)
+ CERROR("%s: can't process %u: %d\n",
+ lod2obd(lod)->obd_name,
+ lcfg->lcfg_command, rc);
+ }
+ lod_putref(lod);
+
+ /*
+ * do cleanup on underlying storage only when
+ * all OSPs are cleaned up, as they use that OSD as well
+ */
+ next = &lod->lod_child->dd_lu_dev;
+ rc = next->ld_ops->ldo_process_config(env, next, lcfg);
+ if (rc)
+ CERROR("%s: can't process %u: %d\n",
+ lod2obd(lod)->obd_name, lcfg->lcfg_command, rc);
+ break;
+
+ default:
+ CERROR("%s: unknown command %u\n", lod2obd(lod)->obd_name,
+ lcfg->lcfg_command);
+ rc = -EINVAL;
+ break;
+ }
+
+out:
+ RETURN(rc);
+}
+
+static int lod_recovery_complete(const struct lu_env *env,
+ struct lu_device *dev)
+{
+ struct lod_device *lod = lu2lod_dev(dev);
+ struct lu_device *next = &lod->lod_child->dd_lu_dev;
+ struct lod_ost_desc *ost;
+ int i, rc;
+ ENTRY;
+
+ LASSERT(lod->lod_recovery_completed == 0);
+ lod->lod_recovery_completed = 1;
+
+ rc = next->ld_ops->ldo_recovery_complete(env, next);
+
+ lod_getref(lod);
+ lod_foreach_ost(lod, i) {
+ ost = OST_TGT(lod, i);
+ LASSERT(ost && ost->ltd_ost);
+ next = &ost->ltd_ost->dd_lu_dev;
+ rc = next->ld_ops->ldo_recovery_complete(env, next);
+ if (rc)
+ CERROR("%s: can't complete recovery on #%d: %d\n",
+ lod2obd(lod)->obd_name, i, rc);
+ }
+ lod_putref(lod);
+
+ RETURN(rc);
+}
+
+const struct lu_device_operations lod_lu_ops = {
+ .ldo_process_config = lod_process_config,
+ .ldo_recovery_complete = lod_recovery_complete,
+};
+
+static int lod_root_get(const struct lu_env *env,
+ struct dt_device *dev, struct lu_fid *f)
+{
+ return dt_root_get(env, dt2lod_dev(dev)->lod_child, f);
+}
+
+static int lod_statfs(const struct lu_env *env,
+ struct dt_device *dev, struct obd_statfs *sfs)
+{
+ return dt_statfs(env, dt2lod_dev(dev)->lod_child, sfs);
+}
+
+static struct thandle *lod_trans_create(const struct lu_env *env,
+ struct dt_device *dev)
+{
+ return dt_trans_create(env, dt2lod_dev(dev)->lod_child);
+}
+
+static int lod_trans_start(const struct lu_env *env, struct dt_device *dev,
+ struct thandle *th)
+{
+ return dt_trans_start(env, dt2lod_dev(dev)->lod_child, th);
+}
+
+static int lod_trans_stop(const struct lu_env *env, struct thandle *th)
+{
+ /* XXX: we don't know next device, will be fixed with DNE */
+ return dt_trans_stop(env, th->th_dev, th);
+}
+
+static void lod_conf_get(const struct lu_env *env,
+ const struct dt_device *dev,
+ struct dt_device_param *param)
+{
+ dt_conf_get(env, dt2lod_dev((struct dt_device *)dev)->lod_child, param);
+}
+
+static int lod_sync(const struct lu_env *env, struct dt_device *dev)
+{
+ struct lod_device *lod = dt2lod_dev(dev);
+ struct lod_ost_desc *ost;
+ int rc = 0, i;
+ ENTRY;
+
+ lod_getref(lod);
+ lod_foreach_ost(lod, i) {
+ ost = OST_TGT(lod, i);
+ LASSERT(ost && ost->ltd_ost);
+ rc = dt_sync(env, ost->ltd_ost);
+ if (rc) {
+ CERROR("%s: can't sync %u: %d\n",
+ lod2obd(lod)->obd_name, i, rc);
+ break;
+ }
+ }
+ lod_putref(lod);
+ if (rc == 0)
+ rc = dt_sync(env, lod->lod_child);
+
+ RETURN(rc);
+}
+
+static int lod_ro(const struct lu_env *env, struct dt_device *dev)
+{
+ return dt_ro(env, dt2lod_dev(dev)->lod_child);
+}
+
+static int lod_commit_async(const struct lu_env *env, struct dt_device *dev)
+{
+ return dt_commit_async(env, dt2lod_dev(dev)->lod_child);
+}
+
+static int lod_init_capa_ctxt(const struct lu_env *env, struct dt_device *dev,
+ int mode, unsigned long timeout,
+ __u32 alg, struct lustre_capa_key *keys)
+{
+ struct dt_device *next = dt2lod_dev(dev)->lod_child;
+ return dt_init_capa_ctxt(env, next, mode, timeout, alg, keys);
+}
+
+static const struct dt_device_operations lod_dt_ops = {
+ .dt_root_get = lod_root_get,
+ .dt_statfs = lod_statfs,
+ .dt_trans_create = lod_trans_create,
+ .dt_trans_start = lod_trans_start,
+ .dt_trans_stop = lod_trans_stop,
+ .dt_conf_get = lod_conf_get,
+ .dt_sync = lod_sync,
+ .dt_ro = lod_ro,
+ .dt_commit_async = lod_commit_async,
+ .dt_init_capa_ctxt = lod_init_capa_ctxt,
+};
+
+static int lod_connect_to_osd(const struct lu_env *env, struct lod_device *lod,
+ struct lustre_cfg *cfg)
+{
+ struct obd_connect_data *data = NULL;
+ struct obd_device *obd;
+ char *nextdev = NULL, *p, *s;
+ int rc, len = 0;
+ ENTRY;
+
+ LASSERT(cfg);
+ LASSERT(lod->lod_child_exp == NULL);
+
+ /* compatibility hack: we still use old config logs
+ * which specify LOV, but we need to learn underlying
+ * OSD device, which is supposed to be:
+ * <fsname>-MDTxxxx-osd
+ *
+ * 2.x MGS generates lines like the following:
+ * #03 (176)lov_setup 0:lustre-MDT0000-mdtlov 1:(struct lov_desc)
+ * 1.8 MGS generates lines like the following:
+ * #03 (168)lov_setup 0:lustre-mdtlov 1:(struct lov_desc)
+ *
+ * we use "-MDT" to differentiate 2.x from 1.8 */
+
+ if ((p = lustre_cfg_string(cfg, 0)) && strstr(p, "-mdtlov")) {
+ len = strlen(p) + 1;
+ OBD_ALLOC(nextdev, len);
+ if (nextdev == NULL)
+ GOTO(out, rc = -ENOMEM);
+
+ strcpy(nextdev, p);
+ s = strstr(nextdev, "-mdtlov");
+ if (unlikely(s == NULL)) {
+ CERROR("unable to parse device name %s\n",
+ lustre_cfg_string(cfg, 0));
+ GOTO(out, rc = -EINVAL);
+ }
+
+ if (strstr(nextdev, "-MDT")) {
+ /* 2.x config */
+ strcpy(s, "-osd");
+ } else {
+ /* 1.8 config */
+ strcpy(s, "-MDT0000-osd");
+ }
+ } else {
+ CERROR("unable to parse device name %s\n",
+ lustre_cfg_string(cfg, 0));
+ GOTO(out, rc = -EINVAL);
+ }
+
+ OBD_ALLOC_PTR(data);
+ if (data == NULL)
+ GOTO(out, rc = -ENOMEM);
+
+ obd = class_name2obd(nextdev);
+ if (obd == NULL) {
+ CERROR("can not locate next device: %s\n", nextdev);
+ GOTO(out, rc = -ENOTCONN);
+ }
+
+ data->ocd_connect_flags = OBD_CONNECT_VERSION;
+ data->ocd_version = LUSTRE_VERSION_CODE;
+
+ rc = obd_connect(env, &lod->lod_child_exp, obd, &obd->obd_uuid,
+ data, NULL);
+ if (rc) {
+ CERROR("cannot connect to next dev %s (%d)\n", nextdev, rc);
+ GOTO(out, rc);
+ }
+
+ lod->lod_dt_dev.dd_lu_dev.ld_site =
+ lod->lod_child_exp->exp_obd->obd_lu_dev->ld_site;
+ LASSERT(lod->lod_dt_dev.dd_lu_dev.ld_site);
+ lod->lod_child = lu2dt_dev(lod->lod_child_exp->exp_obd->obd_lu_dev);
+
+out:
+ if (data)
+ OBD_FREE_PTR(data);
+ if (nextdev)
+ OBD_FREE(nextdev, len);
+ RETURN(rc);
+}
+
+static int lod_init0(const struct lu_env *env, struct lod_device *lod,
+ struct lu_device_type *ldt, struct lustre_cfg *cfg)
+{
+ struct dt_device_param ddp;
+ struct proc_dir_entry *lov_proc_dir;
+ struct obd_device *obd;
+ int rc;
+ ENTRY;
+
+ obd = class_name2obd(lustre_cfg_string(cfg, 0));
+ if (obd == NULL) {
+ CERROR("Cannot find obd with name %s\n",
+ lustre_cfg_string(cfg, 0));
+ RETURN(-ENODEV);
+ }
+
+ lod->lod_dt_dev.dd_lu_dev.ld_ops = &lod_lu_ops;
+ lod->lod_dt_dev.dd_ops = &lod_dt_ops;
+
+ rc = lod_connect_to_osd(env, lod, cfg);
+ if (rc)
+ RETURN(rc);
+
+ dt_conf_get(env, &lod->lod_dt_dev, &ddp);
+ lod->lod_osd_max_easize = ddp.ddp_max_ea_size;
+
+ /* for compatibility we link old procfs's OSC entries to osp ones */
+ lov_proc_dir = lprocfs_srch(proc_lustre_root, "lov");
+ if (lov_proc_dir) {
+ cfs_proc_dir_entry_t *symlink = NULL;
+ char *name;
+ OBD_ALLOC(name, strlen(obd->obd_name) + 1);
+ if (name) {
+ strcpy(name, obd->obd_name);
+ if (strstr(name, "lov"))
+ symlink = lprocfs_add_symlink(name,
+ lov_proc_dir,
+ "../lod/%s",
+ obd->obd_name);
+ OBD_FREE(name, strlen(obd->obd_name) + 1);
+ lod->lod_symlink = symlink;
+ }
+ }
+
+ cfs_mutex_init(&lod->lod_mutex);
+ cfs_init_rwsem(&lod->lod_rw_sem);
+ cfs_spin_lock_init(&lod->lod_desc_lock);
+
+ RETURN(0);
+
+ obd_disconnect(lod->lod_child_exp);
+ RETURN(rc);
+}
+
+static struct lu_device *lod_device_free(const struct lu_env *env,
+ struct lu_device *lu)
+{
+ struct lod_device *lod = lu2lod_dev(lu);
+ struct lu_device *next = &lod->lod_child->dd_lu_dev;
+ ENTRY;
+
+ LASSERT(cfs_atomic_read(&lu->ld_ref) == 0);
+ dt_device_fini(&lod->lod_dt_dev);
+ OBD_FREE_PTR(lod);
+ RETURN(next);
+}
+
+static struct lu_device *lod_device_alloc(const struct lu_env *env,
+ struct lu_device_type *type,
+ struct lustre_cfg *lcfg)
+{
+ struct lod_device *lod;
+ struct lu_device *lu_dev;
+
+ OBD_ALLOC_PTR(lod);
+ if (lod == NULL) {
+ lu_dev = ERR_PTR(-ENOMEM);
+ } else {
+ int rc;
+
+ lu_dev = lod2lu_dev(lod);
+ dt_device_init(&lod->lod_dt_dev, type);
+ rc = lod_init0(env, lod, type, lcfg);
+ if (rc != 0) {
+ lod_device_free(env, lu_dev);
+ lu_dev = ERR_PTR(rc);
+ }
+ }
+
+ return lu_dev;
+}
+
+static struct lu_device *lod_device_fini(const struct lu_env *env,
+ struct lu_device *d)
+{
+ struct lod_device *lod = lu2lod_dev(d);
+ int rc;
+ ENTRY;
+
+ if (lod->lod_symlink)
+ lprocfs_remove(&lod->lod_symlink);
+
+ rc = obd_disconnect(lod->lod_child_exp);
+ if (rc)
+ CERROR("error in disconnect from storage: %d\n", rc);
+
+ RETURN(NULL);
+}
+
+/*
+ * we use exports to track all LOD users
+ */
+static int lod_obd_connect(const struct lu_env *env, struct obd_export **exp,
+ struct obd_device *obd, struct obd_uuid *cluuid,
+ struct obd_connect_data *data, void *localdata)
+{
+ struct lod_device *lod = lu2lod_dev(obd->obd_lu_dev);
+ struct lustre_handle conn;
+ int rc;
+ ENTRY;
+
+ CDEBUG(D_CONFIG, "connect #%d\n", lod->lod_connects);
+
+ rc = class_connect(&conn, obd, cluuid);
+ if (rc)
+ RETURN(rc);
+
+ *exp = class_conn2export(&conn);
+
+ cfs_mutex_lock(&lod->lod_mutex);
+ lod->lod_connects++;
+ /* at the moment we expect the only user */
+ LASSERT(lod->lod_connects == 1);
+ cfs_mutex_unlock(&lod->lod_mutex);
+
+ RETURN(0);
+}
+
+/*
+ * once last export (we don't count self-export) disappeared
+ * lod can be released
+ */
+static int lod_obd_disconnect(struct obd_export *exp)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct lod_device *lod = lu2lod_dev(obd->obd_lu_dev);
+ int rc, release = 0;
+ ENTRY;
+
+ /* Only disconnect the underlying layers on the final disconnect. */
+ cfs_mutex_lock(&lod->lod_mutex);
+ lod->lod_connects--;
+ if (lod->lod_connects != 0) {
+ /* why should there be more than 1 connect? */
+ cfs_mutex_unlock(&lod->lod_mutex);
+ CERROR("%s: disconnect #%d\n", exp->exp_obd->obd_name,
+ lod->lod_connects);
+ goto out;
+ }
+ cfs_mutex_unlock(&lod->lod_mutex);
+
+ /* the last user of lod has gone, let's release the device */
+ release = 1;
+
+out:
+ rc = class_disconnect(exp); /* bz 9811 */
+
+ if (rc == 0 && release)
+ class_manual_cleanup(obd);
+ RETURN(rc);
+}
+
+LU_KEY_INIT(lod, struct lod_thread_info);
+
+static void lod_key_fini(const struct lu_context *ctx,
+ struct lu_context_key *key, void *data)
+{
+ struct lod_thread_info *info = data;
+ /* allocated in lod_get_lov_ea
+ * XXX: this is overload, a tread may have such store but used only
+ * once. Probably better would be pool of such stores per LOD.
+ */
+ if (info->lti_ea_store) {
+ OBD_FREE_LARGE(info->lti_ea_store, info->lti_ea_store_size);
+ info->lti_ea_store = NULL;
+ info->lti_ea_store_size = 0;
+ }
+ OBD_FREE_PTR(info);
+}
+
+/* context key: lod_thread_key */
+LU_CONTEXT_KEY_DEFINE(lod, LCT_MD_THREAD);
+
+LU_TYPE_INIT_FINI(lod, &lod_thread_key);
+
+static struct lu_device_type_operations lod_device_type_ops = {
+ .ldto_init = lod_type_init,
+ .ldto_fini = lod_type_fini,
+
+ .ldto_start = lod_type_start,
+ .ldto_stop = lod_type_stop,
+
+ .ldto_device_alloc = lod_device_alloc,
+ .ldto_device_free = lod_device_free,
+
+ .ldto_device_fini = lod_device_fini
+};
+
+static struct lu_device_type lod_device_type = {
+ .ldt_tags = LU_DEVICE_DT,
+ .ldt_name = LUSTRE_LOD_NAME,
+ .ldt_ops = &lod_device_type_ops,
+ .ldt_ctx_tags = LCT_MD_THREAD,
+};
+
+static int lod_obd_health_check(const struct lu_env *env,
+ struct obd_device *obd)
+{
+ struct lod_device *d = lu2lod_dev(obd->obd_lu_dev);
+ struct lod_ost_desc *ost;
+ int i, rc = 1;
+ ENTRY;
+
+ LASSERT(d);
+ lod_getref(d);
+ cfs_foreach_bit(d->lod_ost_bitmap, i) {
+ ost = OST_TGT(d, i);
+ LASSERT(ost && ost->ltd_ost);
+ rc = obd_health_check(env, ost->ltd_exp->exp_obd);
+ /* one healthy device is enough */
+ if (rc == 0)
+ break;
+ }
+ lod_putref(d);
+ RETURN(rc);
+}
+
+static struct obd_ops lod_obd_device_ops = {
+ .o_owner = THIS_MODULE,
+ .o_connect = lod_obd_connect,
+ .o_disconnect = lod_obd_disconnect,
+ .o_health_check = lod_obd_health_check,
+};
+
+static int __init lod_mod_init(void)
+{
+ struct lprocfs_static_vars lvars = { 0 };
+ cfs_proc_dir_entry_t *lov_proc_dir;
+ int rc;
+
+ rc = lu_kmem_init(lod_caches);
+ if (rc)
+ return rc;
+
+ rc = class_register_type(&lod_obd_device_ops, NULL, lvars.module_vars,
+ LUSTRE_LOD_NAME, &lod_device_type);
+ if (rc) {
+ lu_kmem_fini(lod_caches);
+ return rc;
+ }
+
+ /* create "lov" entry in procfs for compatibility purposes */
+ lov_proc_dir = lprocfs_srch(proc_lustre_root, "lov");
+ if (lov_proc_dir == NULL) {
+ lov_proc_dir = lprocfs_register("lov", proc_lustre_root,
+ NULL, NULL);
+ if (IS_ERR(lov_proc_dir))
+ CERROR("lod: can't create compat entry \"lov\": %d\n",
+ (int)PTR_ERR(lov_proc_dir));
+ }
+
+ return rc;
+}
+
+static void __exit lod_mod_exit(void)
+{
+
+ lprocfs_try_remove_proc_entry("lov", proc_lustre_root);
+
+ class_unregister_type(LUSTRE_LOD_NAME);
+ lu_kmem_fini(lod_caches);
+}
+
+MODULE_AUTHOR("Whamcloud, Inc. <http://www.whamcloud.com/>");
+MODULE_DESCRIPTION("Lustre Logical Object Device ("LUSTRE_LOD_NAME")");
+MODULE_LICENSE("GPL");
+
+module_init(lod_mod_init);
+module_exit(lod_mod_exit);
+
--- /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 COPYING file that accompanied this code.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved
+ * Use is subject to license terms.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/lod/lod_internal.h
+ *
+ * Author: Alex Zhuravlev <alexey.zhuravlev@intel.com>
+ * Author: Mikhail Pershin <mike.pershin@intel.com>
+ */
+
+#ifndef _LOD_INTERNAL_H
+#define _LOD_INTERNAL_H
+
+#include <libcfs/libcfs.h>
+#include <obd.h>
+#include <dt_object.h>
+
+#define LOV_USES_ASSIGNED_STRIPE 0
+#define LOV_USES_DEFAULT_STRIPE 1
+
+struct lod_ost_desc {
+ struct dt_device *ltd_ost;
+ struct list_head ltd_kill;
+ struct obd_export *ltd_exp;
+ struct obd_uuid ltd_uuid;
+ __u32 ltd_gen;
+ __u32 ltd_index;
+ struct ltd_qos ltd_qos; /* qos info per target */
+ struct obd_statfs ltd_statfs;
+ unsigned long ltd_active:1,/* is this target up for requests */
+ ltd_activate:1,/* should target be activated */
+ ltd_reap:1; /* should this target be deleted */
+};
+
+#define OST_PTRS 256 /* number of pointers at 1st level */
+#define OST_PTRS_PER_BLOCK 256 /* number of pointers at 2nd level */
+
+struct lod_ost_desc_idx {
+ struct lod_ost_desc *ldi_ost[OST_PTRS_PER_BLOCK];
+};
+
+#define OST_TGT(dev,index) \
+ ((dev)->lod_ost_idx[(index) / \
+ OST_PTRS_PER_BLOCK]->ldi_ost[(index)%OST_PTRS_PER_BLOCK])
+
+struct lod_device {
+ struct dt_device lod_dt_dev;
+ struct obd_export *lod_child_exp;
+ struct dt_device *lod_child;
+ cfs_proc_dir_entry_t *lod_proc_entry;
+ struct lprocfs_stats *lod_stats;
+ int lod_connects;
+ int lod_recovery_completed;
+
+ /* lov settings descriptor storing static information */
+ struct lov_desc lod_desc;
+
+ /* use to protect ld_active_tgt_count and all ltd_active */
+ cfs_spinlock_t lod_desc_lock;
+
+ /* list of known OSTs */
+ struct lod_ost_desc_idx *lod_ost_idx[OST_PTRS];
+
+ /* Size of the lod_osts array, granted to be a power of 2 */
+ __u32 lod_osts_size;
+ /* number of registered OSTs */
+ int lod_ostnr;
+ /* OSTs scheduled to be deleted */
+ __u32 lod_death_row;
+ /* bitmap of OSTs available */
+ cfs_bitmap_t *lod_ost_bitmap;
+
+ /* maximum EA size underlied OSD may have */
+ unsigned int lod_osd_max_easize;
+
+ /* Table refcount used for delayed deletion */
+ int lod_refcount;
+ /* mutex to serialize concurrent updates to the ost table */
+ cfs_mutex_t lod_mutex;
+ /* read/write semaphore used for array relocation */
+ cfs_rw_semaphore_t lod_rw_sem;
+
+ /* QoS info per LOD */
+ struct lov_qos lod_qos; /* qos info per lod */
+
+ /* OST pool data */
+ struct ost_pool lod_pool_info; /* all OSTs in a packed array */
+ int lod_pool_count;
+ cfs_hash_t *lod_pools_hash_body; /* used for key access */
+ cfs_list_t lod_pool_list; /* used for sequential access */
+ cfs_proc_dir_entry_t *lod_pool_proc_entry;
+
+ enum lustre_sec_part lod_sp_me;
+
+ cfs_proc_dir_entry_t *lod_symlink;
+};
+
+/*
+ * XXX: shrink this structure, currently it's 72bytes on 32bit arch,
+ * so, slab will be allocating 128bytes
+ */
+struct lod_object {
+ struct dt_object ldo_obj;
+
+ /* if object is striped, then the next fields describe stripes */
+ __u16 ldo_stripenr;
+ __u16 ldo_layout_gen;
+ __u32 ldo_stripe_size;
+ char *ldo_pool;
+ struct dt_object **ldo_stripe;
+ /* to know how much memory to free, ldo_stripenr can be less */
+ int ldo_stripes_allocated;
+ /* default striping for directory represented by this object
+ * is cached in stripenr/stripe_size */
+ int ldo_striping_cached:1;
+ int ldo_def_striping_set:1;
+ __u32 ldo_def_stripe_size;
+ __u16 ldo_def_stripenr;
+ __u16 ldo_def_stripe_offset;
+};
+
+
+struct lod_thread_info {
+ /* per-thread buffer for LOV EA */
+ void *lti_ea_store;
+ int lti_ea_store_size;
+ struct lu_buf lti_buf;
+ struct ost_id lti_ostid;
+ struct lu_fid lti_fid;
+ struct obd_statfs lti_osfs;
+ struct lu_attr lti_attr;
+};
+
+extern const struct lu_device_operations lod_lu_ops;
+
+static inline int lu_device_is_lod(struct lu_device *d)
+{
+ return ergo(d != NULL && d->ld_ops != NULL, d->ld_ops == &lod_lu_ops);
+}
+
+static inline struct lod_device* lu2lod_dev(struct lu_device *d)
+{
+ LASSERT(lu_device_is_lod(d));
+ return container_of0(d, struct lod_device, lod_dt_dev.dd_lu_dev);
+}
+
+static inline struct lu_device *lod2lu_dev(struct lod_device *d)
+{
+ return &d->lod_dt_dev.dd_lu_dev;
+}
+
+static inline struct obd_device *lod2obd(struct lod_device *d)
+{
+ return d->lod_dt_dev.dd_lu_dev.ld_obd;
+}
+
+static inline struct lod_device *dt2lod_dev(struct dt_device *d)
+{
+ LASSERT(lu_device_is_lod(&d->dd_lu_dev));
+ return container_of0(d, struct lod_device, lod_dt_dev);
+}
+
+static inline struct lod_object *lu2lod_obj(struct lu_object *o)
+{
+ LASSERT(ergo(o != NULL, lu_device_is_lod(o->lo_dev)));
+ return container_of0(o, struct lod_object, ldo_obj.do_lu);
+}
+
+static inline struct lu_object *lod2lu_obj(struct lod_object *obj)
+{
+ return &obj->ldo_obj.do_lu;
+}
+
+static inline struct lod_object *lod_obj(const struct lu_object *o)
+{
+ LASSERT(lu_device_is_lod(o->lo_dev));
+ return container_of0(o, struct lod_object, ldo_obj.do_lu);
+}
+
+static inline struct lod_object *lod_dt_obj(const struct dt_object *d)
+{
+ return lod_obj(&d->do_lu);
+}
+
+static inline struct dt_object* lod_object_child(struct lod_object *o)
+{
+ return container_of0(lu_object_next(lod2lu_obj(o)),
+ struct dt_object, do_lu);
+}
+
+static inline struct dt_object *lu2dt_obj(struct lu_object *o)
+{
+ LASSERT(ergo(o != NULL, lu_device_is_dt(o->lo_dev)));
+ return container_of0(o, struct dt_object, do_lu);
+}
+
+static inline struct dt_object *dt_object_child(struct dt_object *o)
+{
+ return container_of0(lu_object_next(&(o)->do_lu),
+ struct dt_object, do_lu);
+}
+
+extern struct lu_context_key lod_thread_key;
+
+static inline struct lod_thread_info *lod_env_info(const struct lu_env *env)
+{
+ struct lod_thread_info *info;
+ info = lu_context_key_get(&env->le_ctx, &lod_thread_key);
+ LASSERT(info);
+ return info;
+}
+
+#define lod_foreach_ost(__dev, index) \
+ if ((__dev)->lod_osts_size > 0) \
+ cfs_foreach_bit((__dev)->lod_ost_bitmap, (index))
+
+/* lod_lov.c */
+void lod_getref(struct lod_device *lod);
+void lod_putref(struct lod_device *lod);
+
+
+#endif
+
git://git.whamcloud.com / fs / lustre-release.git / commitdiff