LXR linux/drivers/staging/lustre/lustre/include/lu

   1/*
   2 * GPL HEADER START
   3 *
   4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License version 2 only,
   8 * as published by the Free Software Foundation.
   9 *
  10 * This program is distributed in the hope that it will be useful, but
  11 * WITHOUT ANY WARRANTY; without even the implied warranty of
  12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 * General Public License version 2 for more details (a copy is included
  14 * in the LICENSE file that accompanied this code).
  15 *
  16 * You should have received a copy of the GNU General Public License
  17 * version 2 along with this program; If not, see
  18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19 *
  20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21 * CA 95054 USA or visit www.sun.com if you need additional information or
  22 * have any questions.
  23 *
  24 * GPL HEADER END
  25 */
  26/*
  27 * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
  28 * Use is subject to license terms.
  29 *
  30 * Copyright (c) 2011, 2012, Intel Corporation.
  31 */
  32/*
  33 * This file is part of Lustre, http://www.lustre.org/
  34 * Lustre is a trademark of Sun Microsystems, Inc.
  35 */
  36
  37#ifndef _LUSTRE_LU_TARGET_H
  38#define _LUSTRE_LU_TARGET_H
  39
  40#include <dt_object.h>
  41#include <lustre_disk.h>
  42
  43struct lu_target {
  44        struct obd_device       *lut_obd;
  45        struct dt_device        *lut_bottom;
  46        /** last_rcvd file */
  47        struct dt_object        *lut_last_rcvd;
  48        /* transaction callbacks */
  49        struct dt_txn_callback   lut_txn_cb;
  50        /** server data in last_rcvd file */
  51        struct lr_server_data    lut_lsd;
  52        /** Server last transaction number */
  53        __u64               lut_last_transno;
  54        /** Lock protecting last transaction number */
  55        spinlock_t               lut_translock;
  56        /** Lock protecting client bitmap */
  57        spinlock_t               lut_client_bitmap_lock;
  58        /** Bitmap of known clients */
  59        unsigned long      *lut_client_bitmap;
  60};
  61
  62typedef void (*tgt_cb_t)(struct lu_target *lut, __u64 transno,
  63                         void *data, int err);
  64struct tgt_commit_cb {
  65        tgt_cb_t  tgt_cb_func;
  66        void     *tgt_cb_data;
  67};
  68
  69void tgt_boot_epoch_update(struct lu_target *lut);
  70int tgt_last_commit_cb_add(struct thandle *th, struct lu_target *lut,
  71                           struct obd_export *exp, __u64 transno);
  72int tgt_new_client_cb_add(struct thandle *th, struct obd_export *exp);
  73int tgt_init(const struct lu_env *env, struct lu_target *lut,
  74             struct obd_device *obd, struct dt_device *dt);
  75void tgt_fini(const struct lu_env *env, struct lu_target *lut);
  76int tgt_client_alloc(struct obd_export *exp);
  77void tgt_client_free(struct obd_export *exp);
  78int tgt_client_del(const struct lu_env *env, struct obd_export *exp);
  79int tgt_client_add(const struct lu_env *env, struct obd_export *exp, int);
  80int tgt_client_new(const struct lu_env *env, struct obd_export *exp);
  81int tgt_client_data_read(const struct lu_env *env, struct lu_target *tg,
  82                         struct lsd_client_data *lcd, loff_t *off, int index);
  83int tgt_client_data_write(const struct lu_env *env, struct lu_target *tg,
  84                          struct lsd_client_data *lcd, loff_t *off, struct thandle *th);
  85int tgt_server_data_read(const struct lu_env *env, struct lu_target *tg);
  86int tgt_server_data_write(const struct lu_env *env, struct lu_target *tg,
  87                          struct thandle *th);
  88int tgt_server_data_update(const struct lu_env *env, struct lu_target *tg, int sync);
  89int tgt_truncate_last_rcvd(const struct lu_env *env, struct lu_target *tg, loff_t off);
  90
  91#endif /* __LUSTRE_LU_TARGET_H */
  92