-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
+/*
+ * GPL HEADER START
*
- * Copyright (C) 2002, 2003, 2004, 2005, 2006 Cluster File Systems, Inc.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
- * This file is part of Lustre, http://www.lustre.org.
+ * 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.
*
- * Lustre is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License 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).
*
- * Lustre 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 for more details.
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
- * You should have received a copy of the GNU General Public License
- * along with Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2016, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
*/
#ifndef _LMV_INTERNAL_H_
#define _LMV_INTERNAL_H_
-#include <lustre/lustre_idl.h>
#include <obd.h>
-
-#ifndef __KERNEL__
-/* XXX: dirty hack, needs to be fixed more clever way. */
-struct qstr {
- const char *name;
- size_t len;
- unsigned hashval;
-};
-#endif
+#include <lustre_lmv.h>
#define LMV_MAX_TGT_COUNT 128
-#define lmv_init_lock(lmv) down(&lmv->init_sem);
-#define lmv_init_unlock(lmv) up(&lmv->init_sem);
-
#define LL_IT2STR(it) \
((it) ? ldlm_it2str((it)->it_op) : "0")
-struct lmv_inode {
- struct lu_fid li_fid; /* id of dirobj */
- mdsno_t li_mds; /* cached mdsno where @li_fid lives */
- unsigned long li_size; /* slave size value */
- int li_flags;
-};
-
-#define O_FREEING (1 << 0)
-
-struct lmv_obj {
- struct list_head lo_list;
- struct semaphore lo_guard;
- int lo_state; /* object state. */
- atomic_t lo_count; /* ref counter. */
- struct lu_fid lo_fid; /* master id of dir */
- void *lo_update; /* bitmap of status (up-to-date) */
- __u32 lo_hashtype;
- int lo_objcount; /* number of slaves */
- struct lmv_inode *lo_inodes; /* array of sub-objs */
- struct obd_device *lo_obd; /* pointer to LMV itself */
-};
-
-int lmv_obj_setup(struct obd_device *obd);
-void lmv_obj_cleanup(struct obd_device *obd);
-
-static inline void
-lmv_obj_lock(struct lmv_obj *obj)
+int lmv_intent_lock(struct obd_export *exp, struct md_op_data *op_data,
+ struct lookup_intent *it, struct ptlrpc_request **reqp,
+ ldlm_blocking_callback cb_blocking,
+ __u64 extra_lock_flags);
+
+int lmv_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *,
+ void *, int);
+int lmv_fld_lookup(struct lmv_obd *lmv, const struct lu_fid *fid, u32 *mds);
+int lmv_fid_alloc(const struct lu_env *env, struct obd_export *exp,
+ struct lu_fid *fid, struct md_op_data *op_data);
+
+int lmv_revalidate_slaves(struct obd_export *exp,
+ const struct lmv_stripe_md *lsm,
+ ldlm_blocking_callback cb_blocking,
+ int extra_lock_flags);
+
+int lmv_getattr_name(struct obd_export *exp, struct md_op_data *op_data,
+ struct ptlrpc_request **preq);
+void lmv_activate_target(struct lmv_obd *lmv, struct lmv_tgt_desc *tgt,
+ int activate);
+
+int lmv_statfs_check_update(struct obd_device *obd, struct lmv_tgt_desc *tgt);
+
+static inline struct obd_device *lmv2obd_dev(struct lmv_obd *lmv)
{
- LASSERT(obj);
- down(&obj->lo_guard);
+ return container_of0(lmv, struct obd_device, u.lmv);
}
-static inline void
-lmv_obj_unlock(struct lmv_obj *obj)
+static inline struct lu_tgt_desc *
+lmv_tgt(struct lmv_obd *lmv, __u32 index)
{
- LASSERT(obj);
- up(&obj->lo_guard);
+ return index < lmv->lmv_mdt_descs.ltd_tgt_bitmap->size ?
+ LTD_TGT(&lmv->lmv_mdt_descs, index) : NULL;
}
-void lmv_obj_add(struct lmv_obj *obj);
-void lmv_obj_del(struct lmv_obj *obj);
-
-void lmv_obj_put(struct lmv_obj *obj);
-void lmv_obj_free(struct lmv_obj *obj);
-
-struct lmv_obj *lmv_obj_get(struct lmv_obj *obj);
-
-struct lmv_obj *lmv_obj_grab(struct obd_device *obd,
- const struct lu_fid *fid);
+static inline bool
+lmv_mdt0_inited(struct lmv_obd *lmv)
+{
+ return lmv->lmv_mdt_descs.ltd_tgt_bitmap->size > 0 &&
+ cfs_bitmap_check(lmv->lmv_mdt_descs.ltd_tgt_bitmap, 0);
+}
-struct lmv_obj *lmv_obj_alloc(struct obd_device *obd,
- const struct lu_fid *fid,
- struct lmv_stripe_md *mea);
+#define lmv_foreach_tgt(lmv, tgt) ltd_foreach_tgt(&(lmv)->lmv_mdt_descs, tgt)
-struct lmv_obj *lmv_obj_create(struct obd_export *exp,
- const struct lu_fid *fid,
- struct lmv_stripe_md *mea);
+#define lmv_foreach_tgt_safe(lmv, tgt, tmp) \
+ ltd_foreach_tgt_safe(&(lmv)->lmv_mdt_descs, tgt, tmp)
-int lmv_obj_delete(struct obd_export *exp,
- const struct lu_fid *fid);
+static inline
+struct lu_tgt_desc *lmv_first_connected_tgt(struct lmv_obd *lmv)
+{
+ struct lu_tgt_desc *tgt;
-int lmv_check_connect(struct obd_device *obd);
+ tgt = ltd_first_tgt(&lmv->lmv_mdt_descs);
+ while (tgt && !tgt->ltd_exp)
+ tgt = ltd_next_tgt(&lmv->lmv_mdt_descs, tgt);
-int lmv_intent_lock(struct obd_export *exp, struct md_op_data *op_data,
- void *lmm, int lmmsize, struct lookup_intent *it,
- int flags, struct ptlrpc_request **reqp,
- ldlm_blocking_callback cb_blocking,
- int extra_lock_flags);
-
-int lmv_intent_lookup(struct obd_export *exp, struct md_op_data *op_data,
- void *lmm, int lmmsize, struct lookup_intent *it,
- int flags, struct ptlrpc_request **reqp,
- ldlm_blocking_callback cb_blocking,
- int extra_lock_flags);
-
-int lmv_intent_open(struct obd_export *exp, struct md_op_data *op_data,
- void *lmm, int lmmsize, struct lookup_intent *it,
- int flags, struct ptlrpc_request **reqp,
- ldlm_blocking_callback cb_blocking,
- int extra_lock_flags);
-
-int lmv_intent_getattr(struct obd_export *exp, struct md_op_data *op_data,
- void *lmm, int lmmsize, struct lookup_intent *it,
- int flags, struct ptlrpc_request **reqp,
- ldlm_blocking_callback cb_blocking,
- int extra_lock_flags);
-
-int lmv_revalidate_slaves(struct obd_export *, struct ptlrpc_request **,
- const struct lu_fid *, struct lookup_intent *, int,
- ldlm_blocking_callback cb_blocking,
- int extra_lock_flags);
+ return tgt;
+}
-int lmv_handle_split(struct obd_export *, const struct lu_fid *);
-int lmv_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *,
- void *, int);
-int lmv_fld_lookup(struct lmv_obd *lmv, const struct lu_fid *fid,
- mdsno_t *mds);
-int __lmv_fid_alloc(struct lmv_obd *lmv, struct lu_fid *fid,
- mdsno_t mds);
-int lmv_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
- struct md_op_data *op_data);
-int lmv_alloc_slave_fids(struct obd_device *obd, struct lu_fid *pid,
- struct md_op_data *op, struct lu_fid *fid);
-
-static inline struct lmv_stripe_md *
-lmv_get_mea(struct ptlrpc_request *req, int offset)
+static inline
+struct lu_tgt_desc *lmv_next_connected_tgt(struct lmv_obd *lmv,
+ struct lu_tgt_desc *tgt)
{
- struct mdt_body *body;
- struct lmv_stripe_md *mea;
+ do {
+ tgt = ltd_next_tgt(&lmv->lmv_mdt_descs, tgt);
+ } while (tgt && !tgt->ltd_exp);
- LASSERT(req);
+ return tgt;
+}
- body = lustre_msg_buf(req->rq_repmsg, offset, sizeof(*body));
- LASSERT(lustre_rep_swabbed(req, offset));
+#define lmv_foreach_connected_tgt(lmv, tgt) \
+ for (tgt = lmv_first_connected_tgt(lmv); tgt; \
+ tgt = lmv_next_connected_tgt(lmv, tgt))
- if (!body || !S_ISDIR(body->mode) || !body->eadatasize)
- return NULL;
+static inline int
+lmv_fid2tgt_index(struct lmv_obd *lmv, const struct lu_fid *fid)
+{
+ u32 mdt_idx;
+ int rc;
- mea = lustre_msg_buf(req->rq_repmsg, offset + 1,
- body->eadatasize);
- LASSERT(mea != NULL);
+ if (lmv->lmv_mdt_count < 2)
+ return 0;
- if (mea->mea_count == 0)
- return NULL;
- if( mea->mea_magic != MEA_MAGIC_LAST_CHAR &&
- mea->mea_magic != MEA_MAGIC_ALL_CHARS &&
- mea->mea_magic != MEA_MAGIC_HASH_SEGMENT)
- return NULL;
-
- return mea;
-}
+ rc = lmv_fld_lookup(lmv, fid, &mdt_idx);
+ if (rc < 0)
+ return rc;
-static inline int lmv_get_easize(struct lmv_obd *lmv)
-{
- return sizeof(struct lmv_stripe_md) +
- lmv->desc.ld_tgt_count *
- sizeof(struct lu_fid);
+ return mdt_idx;
}
static inline struct lmv_tgt_desc *
-lmv_get_target(struct lmv_obd *lmv, mdsno_t mds)
+lmv_fid2tgt(struct lmv_obd *lmv, const struct lu_fid *fid)
{
- return &lmv->tgts[mds];
-}
+ struct lu_tgt_desc *tgt;
+ int index;
-static inline struct obd_export *
-lmv_get_export(struct lmv_obd *lmv, mdsno_t mds)
-{
- return lmv_get_target(lmv, mds)->ltd_exp;
+ index = lmv_fid2tgt_index(lmv, fid);
+ if (index < 0)
+ return ERR_PTR(index);
+
+ tgt = lmv_tgt(lmv, index);
+
+ return tgt ? tgt : ERR_PTR(-ENODEV);
}
-static inline struct lmv_tgt_desc *
-lmv_find_target(struct lmv_obd *lmv, const struct lu_fid *fid)
+static inline int lmv_stripe_md_size(int stripe_count)
{
- mdsno_t mds;
- int rc;
-
- rc = lmv_fld_lookup(lmv, fid, &mds);
- if (rc)
- return ERR_PTR(rc);
-
- return lmv_get_target(lmv, mds);
+ struct lmv_stripe_md *lsm;
+
+ return sizeof(*lsm) + stripe_count * sizeof(lsm->lsm_md_oinfo[0]);
}
-static inline struct obd_export *
-lmv_find_export(struct lmv_obd *lmv, const struct lu_fid *fid)
+/* for file under migrating directory, return the target stripe info */
+static inline const struct lmv_oinfo *
+lsm_name_to_stripe_info(const struct lmv_stripe_md *lsm, const char *name,
+ int namelen, bool post_migrate)
{
- struct lmv_tgt_desc *tgt = lmv_find_target(lmv, fid);
- if (IS_ERR(tgt))
- return (struct obd_export *)tgt;
- return tgt->ltd_exp;
+ __u32 hash_type = lsm->lsm_md_hash_type;
+ __u32 stripe_count = lsm->lsm_md_stripe_count;
+ int stripe_index;
+
+ LASSERT(lmv_dir_striped(lsm));
+
+ if (hash_type & LMV_HASH_FLAG_MIGRATION) {
+ if (post_migrate) {
+ hash_type &= ~LMV_HASH_FLAG_MIGRATION;
+ stripe_count = lsm->lsm_md_migrate_offset;
+ } else {
+ hash_type = lsm->lsm_md_migrate_hash;
+ stripe_count -= lsm->lsm_md_migrate_offset;
+ }
+ }
+
+ stripe_index = lmv_name_to_stripe_index(hash_type, stripe_count,
+ name, namelen);
+ if (stripe_index < 0)
+ return ERR_PTR(stripe_index);
+
+ if ((lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION) && !post_migrate)
+ stripe_index += lsm->lsm_md_migrate_offset;
+
+ if (stripe_index >= lsm->lsm_md_stripe_count) {
+ CERROR("stripe_index %d stripe_count %d hash_type %#x "
+ "migrate_offset %d migrate_hash %#x name %.*s\n",
+ stripe_index, lsm->lsm_md_stripe_count,
+ lsm->lsm_md_hash_type, lsm->lsm_md_migrate_offset,
+ lsm->lsm_md_migrate_hash, namelen, name);
+ return ERR_PTR(-EBADF);
+ }
+
+ return &lsm->lsm_md_oinfo[stripe_index];
}
-static inline void lmv_update_body(struct mdt_body *body,
- struct lmv_inode *lino)
+static inline bool lmv_dir_retry_check_update(struct md_op_data *op_data)
{
- /* update object size */
- body->size += lino->li_size;
+ const struct lmv_stripe_md *lsm = op_data->op_mea1;
+
+ if (!lsm)
+ return false;
+
+ if (lmv_dir_migrating(lsm) && !op_data->op_post_migrate) {
+ op_data->op_post_migrate = true;
+ return true;
+ }
+
+ if (lmv_dir_bad_hash(lsm) &&
+ op_data->op_stripe_index < lsm->lsm_md_stripe_count - 1) {
+ op_data->op_stripe_index++;
+ return true;
+ }
+
+ return false;
}
-/* lproc_lmv.c */
-extern struct file_operations lmv_proc_target_fops;
+struct lmv_tgt_desc *lmv_locate_tgt(struct lmv_obd *lmv,
+ struct md_op_data *op_data);
+int lmv_migrate_existence_check(struct lmv_obd *lmv,
+ struct md_op_data *op_data);
+/* lproc_lmv.c */
+int lmv_tunables_init(struct obd_device *obd);
#endif
-
git://git.whamcloud.com / fs / lustre-release.git / blobdiff