| /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- |
| * vim:expandtab:shiftwidth=8:tabstop=8: |
| * |
| * Copyright (C) 1998 Peter J. Braam <braam@clusterfs.com> |
| * Copyright (C) 2000 Red Hat, Inc. |
| * Copyright (C) 2000 Los Alamos National Laboratory |
| * Copyright (C) 2000 TurboLinux, Inc. |
| * Copyright (C) 2001 Mountain View Data, Inc. |
| * |
| * This file is part of InterMezzo, http://www.inter-mezzo.org. |
| * |
| * InterMezzo 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. |
| * |
| * InterMezzo 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 |
| * along with InterMezzo; if not, write to the Free Software |
| * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| |
| #include <linux/types.h> |
| #include <linux/param.h> |
| #include <linux/sched.h> |
| #include <linux/fs.h> |
| #include <linux/slab.h> |
| #include <linux/vmalloc.h> |
| #include <linux/stat.h> |
| #include <linux/errno.h> |
| #include <linux/smp_lock.h> |
| #include <linux/locks.h> |
| #include <asm/segment.h> |
| #include <asm/uaccess.h> |
| #include <linux/string.h> |
| #if 0 |
| #if defined(CONFIG_REISERFS_FS) || defined(CONFIG_REISERFS_FS_MODULE) |
| #include <linux/reiserfs_fs.h> |
| #include <linux/reiserfs_fs_sb.h> |
| #include <linux/reiserfs_fs_i.h> |
| #endif |
| |
| #include <linux/intermezzo_fs.h> |
| #include <linux/intermezzo_psdev.h> |
| |
| #if defined(CONFIG_REISERFS_FS) || defined(CONFIG_REISERFS_FS_MODULE) |
| |
| |
| static loff_t presto_reiserfs_freespace(struct presto_cache *cache, |
| struct super_block *sb) |
| { |
| struct reiserfs_super_block * rs = SB_DISK_SUPER_BLOCK (sb); |
| loff_t avail; |
| |
| avail = le32_to_cpu(rs->s_free_blocks) * |
| le16_to_cpu(rs->s_blocksize); |
| return avail; |
| } |
| |
| /* start the filesystem journal operations */ |
| static void *presto_reiserfs_trans_start(struct presto_file_set *fset, |
| struct inode *inode, |
| int op) |
| { |
| int jblocks; |
| __u32 avail_kmlblocks; |
| struct reiserfs_transaction_handle *th ; |
| |
| PRESTO_ALLOC(th, sizeof(*th)); |
| if (!th) { |
| CERROR("presto: No memory for trans handle\n"); |
| return NULL; |
| } |
| |
| avail_kmlblocks = presto_reiserfs_freespace(fset->fset_cache, |
| inode->i_sb); |
| if ( presto_no_journal(fset) || |
| strcmp(fset->fset_cache->cache_type, "reiserfs")) |
| { |
| CDEBUG(D_JOURNAL, "got cache_type \"%s\"\n", |
| fset->fset_cache->cache_type); |
| return NULL; |
| } |
| |
| if ( avail_kmlblocks < 3 ) { |
| return ERR_PTR(-ENOSPC); |
| } |
| |
| if ( (op != PRESTO_OP_UNLINK && op != PRESTO_OP_RMDIR) |
| && avail_kmlblocks < 6 ) { |
| return ERR_PTR(-ENOSPC); |
| } |
| |
| jblocks = 3 + JOURNAL_PER_BALANCE_CNT * 4; |
| CDEBUG(D_JOURNAL, "creating journal handle (%d blocks)\n", jblocks); |
| |
| lock_kernel(); |
| journal_begin(th, inode->i_sb, jblocks); |
| unlock_kernel(); |
| return th; |
| } |
| |
| static void presto_reiserfs_trans_commit(struct presto_file_set *fset, |
| void *handle) |
| { |
| int jblocks; |
| jblocks = 3 + JOURNAL_PER_BALANCE_CNT * 4; |
| |
| lock_kernel(); |
| journal_end(handle, fset->fset_cache->cache_sb, jblocks); |
| unlock_kernel(); |
| PRESTO_FREE(handle, sizeof(struct reiserfs_transaction_handle)); |
| } |
| |
| static void presto_reiserfs_journal_file_data(struct inode *inode) |
| { |
| #ifdef EXT3_JOURNAL_DATA_FL |
| inode->u.ext3_i.i_flags |= EXT3_JOURNAL_DATA_FL; |
| #else |
| #warning You must have a facility to enable journaled writes for recovery! |
| #endif |
| } |
| |
| static int presto_reiserfs_has_all_data(struct inode *inode) |
| { |
| BUG(); |
| return 0; |
| } |
| |
| struct journal_ops presto_reiserfs_journal_ops = { |
| .tr_all_data = presto_reiserfs_has_all_data, |
| .tr_avail = presto_reiserfs_freespace, |
| .tr_start = presto_reiserfs_trans_start, |
| .tr_commit = presto_reiserfs_trans_commit, |
| .tr_journal_data = presto_reiserfs_journal_file_data |
| }; |
| |
| #endif |
| #endif |