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/*
* Intermezzo. (C) 1998 Peter J. Braam
* Intermezzo. (C) 2000 Red Hat, Inc.
* Intermezzo. (C) 2000 Los Alamos National Laboratory
* Intermezzo. (C) 2000 TurboLinux, Inc.
* Intermezzo. (C) 2001 Mountain View Data, Inc.
*/
#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_upcall.h>
#include <linux/intermezzo_psdev.h>
#include <linux/intermezzo_kml.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, struct reiserfs_transaction_handle *, sizeof(*th));
if (!th) {
printk("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;
}
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));
}
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
}
struct journal_ops presto_reiserfs_journal_ops = {
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
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