-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* 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.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
/*
* Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
- */
-/*
- * Copyright (c) 2011 Whamcloud, Inc.
+ *
+ * Copyright (c) 2011, 2016, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#ifndef _LMV_INTERNAL_H_
#define _LMV_INTERNAL_H_
-#include <lustre/lustre_idl.h>
#include <obd.h>
+#include <lustre_lmv.h>
#define LMV_MAX_TGT_COUNT 128
-#define lmv_init_lock(lmv) cfs_down(&lmv->init_sem);
-#define lmv_init_unlock(lmv) cfs_up(&lmv->init_sem);
-
#define LL_IT2STR(it) \
((it) ? ldlm_it2str((it)->it_op) : "0")
-struct lmv_stripe {
- /**
- * Dir stripe fid.
- */
- struct lu_fid ls_fid;
- /**
- * Cached home mds number for \a li_fid.
- */
- mdsno_t ls_mds;
- /**
- * Stripe object size.
- */
- unsigned long ls_size;
- /**
- * Stripe flags.
- */
- int ls_flags;
-};
-
-#define O_FREEING (1 << 0)
-
-struct lmv_object {
- /**
- * Link to global objects list.
- */
- cfs_list_t lo_list;
- /**
- * Sema for protecting fields.
- */
- cfs_semaphore_t lo_guard;
- /**
- * Object state like O_FREEING.
- */
- int lo_state;
- /**
- * Object ref counter.
- */
- cfs_atomic_t lo_count;
- /**
- * Object master fid.
- */
- struct lu_fid lo_fid;
- /**
- * Object hash type to find stripe by name.
- */
- __u32 lo_hashtype;
- /**
- * Number of stripes.
- */
- int lo_objcount;
- /**
- * Array of sub-objs.
- */
- struct lmv_stripe *lo_stripes;
- /**
- * Pointer to LMV obd.
- */
- struct obd_device *lo_obd;
-};
-
-int lmv_object_setup(struct obd_device *obd);
-void lmv_object_cleanup(struct obd_device *obd);
-
-static inline void
-lmv_object_lock(struct lmv_object *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(struct lmv_obd *lmv, 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);
- cfs_down(&obj->lo_guard);
+ return container_of0(lmv, struct obd_device, u.lmv);
}
-static inline void
-lmv_object_unlock(struct lmv_object *obj)
+static inline struct lu_tgt_desc *
+lmv_tgt(struct lmv_obd *lmv, __u32 index)
{
- LASSERT(obj);
- cfs_up(&obj->lo_guard);
+ return index < lmv->lmv_mdt_descs.ltd_tgt_bitmap->size ?
+ LTD_TGT(&lmv->lmv_mdt_descs, index) : NULL;
}
-void lmv_object_add(struct lmv_object *obj);
-void lmv_object_del(struct lmv_object *obj);
-
-void lmv_object_put(struct lmv_object *obj);
-void lmv_object_put_unlock(struct lmv_object *obj);
-void lmv_object_free(struct lmv_object *obj);
+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_object *lmv_object_get(struct lmv_object *obj);
+#define lmv_foreach_tgt(lmv, tgt) ltd_foreach_tgt(&(lmv)->lmv_mdt_descs, tgt)
-struct lmv_object *lmv_object_find(struct obd_device *obd,
- const struct lu_fid *fid);
+#define lmv_foreach_tgt_safe(lmv, tgt, tmp) \
+ ltd_foreach_tgt_safe(&(lmv)->lmv_mdt_descs, tgt, tmp)
-struct lmv_object *lmv_object_find_lock(struct obd_device *obd,
- const struct lu_fid *fid);
+static inline
+struct lu_tgt_desc *lmv_first_connected_tgt(struct lmv_obd *lmv)
+{
+ struct lu_tgt_desc *tgt;
-struct lmv_object *lmv_object_alloc(struct obd_device *obd,
- const struct lu_fid *fid,
- struct lmv_stripe_md *mea);
+ tgt = ltd_first_tgt(&lmv->lmv_mdt_descs);
+ while (tgt && !tgt->ltd_exp)
+ tgt = ltd_next_tgt(&lmv->lmv_mdt_descs, tgt);
-struct lmv_object *lmv_object_create(struct obd_export *exp,
- const struct lu_fid *fid,
- struct lmv_stripe_md *mea);
+ return tgt;
+}
-int lmv_object_delete(struct obd_export *exp,
- const struct lu_fid *fid);
+static inline
+struct lu_tgt_desc *lmv_next_connected_tgt(struct lmv_obd *lmv,
+ struct lu_tgt_desc *tgt)
+{
+ do {
+ tgt = ltd_next_tgt(&lmv->lmv_mdt_descs, tgt);
+ } while (tgt && !tgt->ltd_exp);
-int lmv_check_connect(struct obd_device *obd);
+ return 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_allocate_slaves(struct obd_device *obd, struct lu_fid *pid,
- struct md_op_data *op, struct lu_fid *fid);
-
-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);
+#define lmv_foreach_connected_tgt(lmv, tgt) \
+ for (tgt = lmv_first_connected_tgt(lmv); tgt; \
+ tgt = lmv_next_connected_tgt(lmv, 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);
-
-static inline struct lmv_stripe_md *lmv_get_mea(struct ptlrpc_request *req)
+static inline int
+lmv_fid2tgt_index(struct lmv_obd *lmv, const struct lu_fid *fid)
{
- struct mdt_body *body;
- struct lmv_stripe_md *mea;
+ u32 mdt_idx;
+ int rc;
- LASSERT(req != NULL);
+ if (lmv->lmv_mdt_count < 2)
+ return 0;
- body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
+ rc = lmv_fld_lookup(lmv, fid, &mdt_idx);
+ if (rc < 0)
+ return rc;
- if (!body || !S_ISDIR(body->mode) || !body->eadatasize)
- return NULL;
+ return mdt_idx;
+}
+
+static inline struct lmv_tgt_desc *
+lmv_fid2tgt(struct lmv_obd *lmv, const struct lu_fid *fid)
+{
+ struct lu_tgt_desc *tgt;
+ int index;
- mea = req_capsule_server_sized_get(&req->rq_pill, &RMF_MDT_MD,
- body->eadatasize);
- LASSERT(mea != NULL);
+ index = lmv_fid2tgt_index(lmv, fid);
+ if (index < 0)
+ return ERR_PTR(index);
- 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;
+ tgt = lmv_tgt(lmv, index);
- return mea;
+ return tgt ? tgt : ERR_PTR(-ENODEV);
}
-static inline int lmv_get_easize(struct lmv_obd *lmv)
+static inline int lmv_stripe_md_size(int stripe_count)
{
- return sizeof(struct lmv_stripe_md) +
- lmv->desc.ld_tgt_count *
- sizeof(struct lu_fid);
+ struct lmv_stripe_md *lsm;
+
+ return sizeof(*lsm) + stripe_count * sizeof(lsm->lsm_md_oinfo[0]);
}
-static inline struct lmv_tgt_desc *
-lmv_get_target(struct lmv_obd *lmv, mdsno_t mds)
+/* 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)
{
- return &lmv->tgts[mds];
+ __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 struct lmv_tgt_desc *
-lmv_find_target(struct lmv_obd *lmv, const struct lu_fid *fid)
+static inline bool lmv_dir_retry_check_update(struct md_op_data *op_data)
{
- mdsno_t mds = 0;
- int rc;
+ const struct lmv_stripe_md *lsm = op_data->op_mea1;
+
+ if (!lsm)
+ return false;
- if (lmv->desc.ld_tgt_count > 1) {
- rc = lmv_fld_lookup(lmv, fid, &mds);
- if (rc)
- return ERR_PTR(rc);
- }
+ if (lmv_dir_migrating(lsm) && !op_data->op_post_migrate) {
+ op_data->op_post_migrate = true;
+ return true;
+ }
- return lmv_get_target(lmv, mds);
+ 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;
}
+struct lmv_tgt_desc *lmv_locate_tgt(struct lmv_obd *lmv,
+ struct md_op_data *op_data);
+
/* lproc_lmv.c */
-#ifdef LPROCFS
-void lprocfs_lmv_init_vars(struct lprocfs_static_vars *lvars);
-#else
-static inline void lprocfs_lmv_init_vars(struct lprocfs_static_vars *lvars)
-{
- memset(lvars, 0, sizeof(*lvars));
-}
-#endif
-extern struct file_operations lmv_proc_target_fops;
+int lmv_tunables_init(struct obd_device *obd);
#endif