X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Flmv%2Flmv_internal.h;h=d0527ba0f00272ea4e383ca3aa24b72b2c742914;hb=2d2dac3ae77a3cbdc505328b6cbf648323a0795c;hp=87706464f58bbd2fb7a2f39f07d06fea6d281fb8;hpb=cc28cf202635ddda1a342357ab6431e5569c8179;p=fs%2Flustre-release.git diff --git a/lustre/lmv/lmv_internal.h b/lustre/lmv/lmv_internal.h index 8770646..d0527ba 100644 --- a/lustre/lmv/lmv_internal.h +++ b/lustre/lmv/lmv_internal.h @@ -1,142 +1,204 @@ +/* + * 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.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, 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 +#include + +#define LMV_MAX_TGT_COUNT 128 + #define LL_IT2STR(it) \ ((it) ? ldlm_it2str((it)->it_op) : "0") -#define MEA_SIZE_LMV(lmv) \ - ((lmv)->desc.ld_tgt_count * \ - sizeof(struct ll_fid) + sizeof(struct mea)) - -struct lmv_inode { - struct ll_fid fid; /* fid of dirobj */ - unsigned long size; /* slave size value */ - int flags; -}; - -#define O_FREEING (1 << 0) - -struct lmv_obj { - struct list_head list; - struct semaphore guard; - int state; /* object state. */ - atomic_t count; /* ref counter. */ - struct ll_fid fid; /* master fid of dir */ - void *update; /* bitmap of status (uptodate) */ - __u32 hashtype; - int objcount; /* number of slaves */ - struct lmv_inode *objs; /* array of dirobjs */ - struct obd_device *obd; /* pointer to LMV itself */ - unsigned long mtime; - unsigned long ctime; - unsigned long atime; - unsigned long nlink; -}; - -static inline void -lmv_lock_obj(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 lu_fid *pfid, + 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->guard); + return container_of_safe(lmv, struct obd_device, u.lmv); } -static inline void -lmv_unlock_obj(struct lmv_obj *obj) +static inline struct lu_tgt_desc * +lmv_tgt(struct lmv_obd *lmv, __u32 index) { - LASSERT(obj); - up(&obj->guard); + return index < lmv->lmv_mdt_descs.ltd_tgts_size ? + LTD_TGT(&lmv->lmv_mdt_descs, index) : NULL; } -void lmv_add_obj(struct lmv_obj *obj); -void lmv_del_obj(struct lmv_obj *obj); +static inline bool +lmv_mdt0_inited(struct lmv_obd *lmv) +{ + return lmv->lmv_mdt_descs.ltd_tgts_size > 0 && + test_bit(0, lmv->lmv_mdt_descs.ltd_tgt_bitmap); +} + +#define lmv_foreach_tgt(lmv, tgt) ltd_foreach_tgt(&(lmv)->lmv_mdt_descs, tgt) + +#define lmv_foreach_tgt_safe(lmv, tgt, tmp) \ + ltd_foreach_tgt_safe(&(lmv)->lmv_mdt_descs, tgt, tmp) -void lmv_put_obj(struct lmv_obj *obj); -void lmv_free_obj(struct lmv_obj *obj); +static inline +struct lu_tgt_desc *lmv_first_connected_tgt(struct lmv_obd *lmv) +{ + struct lu_tgt_desc *tgt; + + tgt = ltd_first_tgt(&lmv->lmv_mdt_descs); + while (tgt && !tgt->ltd_exp) + tgt = ltd_next_tgt(&lmv->lmv_mdt_descs, tgt); -int lmv_setup_mgr(struct obd_device *obd); -void lmv_cleanup_mgr(struct obd_device *obd); -int lmv_check_connect(struct obd_device *obd); + return tgt; +} -struct lmv_obj *lmv_get_obj(struct lmv_obj *obj); +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); -struct lmv_obj *lmv_grab_obj(struct obd_device *obd, - struct ll_fid *fid); + return tgt; +} -struct lmv_obj *lmv_alloc_obj(struct obd_device *obd, - struct ll_fid *fid, - struct mea *mea); +#define lmv_foreach_connected_tgt(lmv, tgt) \ + for (tgt = lmv_first_connected_tgt(lmv); tgt; \ + tgt = lmv_next_connected_tgt(lmv, tgt)) -struct lmv_obj *lmv_create_obj(struct obd_export *exp, - struct ll_fid *fid, - struct mea *mea); +static inline int +lmv_fid2tgt_index(struct lmv_obd *lmv, const struct lu_fid *fid) +{ + u32 mdt_idx; + int rc; -int lmv_delete_obj(struct obd_export *exp, struct ll_fid *fid); + if (lmv->lmv_mdt_count < 2) + return 0; -int lmv_intent_lock(struct obd_export *, struct ll_uctxt *, - struct ll_fid *, const char *, int, void *, int, - struct ll_fid *, struct lookup_intent *, int, - struct ptlrpc_request **, ldlm_blocking_callback); + rc = lmv_fld_lookup(lmv, fid, &mdt_idx); + if (rc < 0) + return rc; -int lmv_intent_lookup(struct obd_export *, struct ll_uctxt *, - struct ll_fid *, const char *, int, void *, int, - struct ll_fid *, struct lookup_intent *, int, - struct ptlrpc_request **, ldlm_blocking_callback); + return mdt_idx; +} -int lmv_intent_getattr(struct obd_export *, struct ll_uctxt *, - struct ll_fid *, const char *, int, void *, int, - struct ll_fid *, struct lookup_intent *, int, - struct ptlrpc_request **, ldlm_blocking_callback); +static inline struct lmv_tgt_desc * +lmv_fid2tgt(struct lmv_obd *lmv, const struct lu_fid *fid) +{ + struct lu_tgt_desc *tgt; + int index; -int lmv_intent_open(struct obd_export *, struct ll_uctxt *, - struct ll_fid *, const char *, int, void *, int, - struct ll_fid *, struct lookup_intent *, int, - struct ptlrpc_request **, ldlm_blocking_callback); + index = lmv_fid2tgt_index(lmv, fid); + if (index < 0) + return ERR_PTR(index); -int lmv_revalidate_slaves(struct obd_export *, struct ptlrpc_request **, - struct ll_fid *, struct lookup_intent *, int, - ldlm_blocking_callback cb_blocking); + tgt = lmv_tgt(lmv, index); -int lmv_get_mea_and_update_object(struct obd_export *, struct ll_fid *); -int lmv_dirobj_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *, - void *, int); + return tgt ? tgt : ERR_PTR(-ENODEV); +} -static inline struct mea * -body_of_splitted_dir(struct ptlrpc_request *req, int offset) +static inline int lmv_stripe_md_size(int stripe_count) { - struct mds_body *body; - struct mea *mea; + struct lmv_stripe_md *lsm; - LASSERT(req); + return sizeof(*lsm) + stripe_count * sizeof(lsm->lsm_md_oinfo[0]); +} - body = lustre_msg_buf(req->rq_repmsg, offset, sizeof(*body)); +/* 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 new_layout) +{ + int stripe_index; - if (!body || !S_ISDIR(body->mode) || !body->eadatasize) - return NULL; + LASSERT(lmv_dir_striped(lsm)); - mea = lustre_msg_buf(req->rq_repmsg, - offset + 1, body->eadatasize); - LASSERT(mea); + stripe_index = __lmv_name_to_stripe_index(lsm->lsm_md_hash_type, + lsm->lsm_md_stripe_count, + lsm->lsm_md_migrate_hash, + lsm->lsm_md_migrate_offset, + name, namelen, new_layout); + if (stripe_index < 0) + return ERR_PTR(stripe_index); - if (mea->mea_count == 0) - return NULL; - - return mea; + return &lsm->lsm_md_oinfo[stripe_index]; } -static inline int -fid_equal(struct ll_fid *fid1, struct ll_fid *fid2) +static inline bool lmv_dir_retry_check_update(struct md_op_data *op_data) { - if (fid1->mds != fid2->mds) - return 0; - if (fid1->id != fid2->id) - return 0; - if (fid1->generation != fid2->generation) - return 0; - return 1; + const struct lmv_stripe_md *lsm = op_data->op_mea1; + + if (!lsm) + return false; + + if (lmv_dir_layout_changing(lsm) && !op_data->op_new_layout) { + op_data->op_new_layout = 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_old_layout_lookup(struct lmv_obd *lmv, struct md_op_data *op_data); +/* lproc_lmv.c */ +int lmv_tunables_init(struct obd_device *obd); #endif -