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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [fs/] [intermezzo/] [journal_reiserfs.c] - Rev 1765
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/* -*- 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