1/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- 2 * vim:expandtab:shiftwidth=8:tabstop=8: 3 * 4 * Copyright (C) 1998 Peter J. Braam <braam@clusterfs.com> 5 * Copyright (C) 2000 Red Hat, Inc. 6 * Copyright (C) 2000 Los Alamos National Laboratory 7 * Copyright (C) 2000 TurboLinux, Inc. 8 * Copyright (C) 2001 Mountain View Data, Inc. 9 * Copyright (C) 2001 Tacit Networks, Inc. <phil@off.net> 10 * 11 * This file is part of InterMezzo, http://www.inter-mezzo.org. 12 * 13 * InterMezzo is free software; you can redistribute it and/or 14 * modify it under the terms of version 2 of the GNU General Public 15 * License as published by the Free Software Foundation. 16 * 17 * InterMezzo is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 * 22 * You should have received a copy of the GNU General Public License 23 * along with InterMezzo; if not, write to the Free Software 24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 25 */ 26 27#include <linux/types.h> 28#include <linux/param.h> 29#include <linux/kernel.h> 30#include <linux/sched.h> 31#include <linux/fs.h> 32#include <linux/slab.h> 33#include <linux/vmalloc.h> 34#include <linux/stat.h> 35#include <linux/errno.h> 36#include <linux/locks.h> 37#include <asm/segment.h> 38#include <asm/uaccess.h> 39#include <linux/string.h> 40#include <linux/smp_lock.h> 41#if defined(CONFIG_TMPFS) 42#include <linux/jbd.h> 43#if defined(CONFIG_EXT3) 44#include <linux/ext3_fs.h> 45#include <linux/ext3_jbd.h> 46#endif 47#endif 48 49#include <linux/intermezzo_fs.h> 50#include <linux/intermezzo_psdev.h> 51 52#if defined(CONFIG_TMPFS) 53 54/* space requirements: 55 presto_do_truncate: 56 used to truncate the KML forward to next fset->chunksize boundary 57 - zero partial block 58 - update inode 59 presto_write_record: 60 write header (< one block) 61 write one path (< MAX_PATHLEN) 62 possibly write another path (< MAX_PATHLEN) 63 write suffix (< one block) 64 presto_update_last_rcvd 65 write one block 66*/ 67 68static loff_t presto_tmpfs_freespace(struct presto_cache *cache, 69 struct super_block *sb) 70{ 71 return (1<<30); 72} 73 74/* start the filesystem journal operations */ 75static void *presto_tmpfs_trans_start(struct presto_file_set *fset, 76 struct inode *inode, 77 int op) 78{ 79 return (void *)1; 80} 81 82static void presto_tmpfs_trans_commit(struct presto_file_set *fset, void *handle) 83{ 84 return; 85} 86 87static void presto_tmpfs_journal_file_data(struct inode *inode) 88{ 89 return; 90} 91 92/* The logic here is a slightly modified version of ext3/inode.c:block_to_path 93 */ 94static int presto_tmpfs_has_all_data(struct inode *inode) 95{ 96 return 0; 97} 98 99struct journal_ops presto_tmpfs_journal_ops = { 100 tr_all_data: presto_tmpfs_has_all_data, 101 tr_avail: presto_tmpfs_freespace, 102 tr_start: presto_tmpfs_trans_start, 103 tr_commit: presto_tmpfs_trans_commit, 104 tr_journal_data: presto_tmpfs_journal_file_data, 105 tr_ilookup: presto_tmpfs_ilookup, 106 tr_add_ilookup: presto_add_ilookup_dentry 107}; 108 109#endif /* CONFIG_EXT3_FS */ 110