patch-2.4.15 linux/fs/intermezzo/journal_reiserfs.c

• Lines: 120
• Date: Sun Nov 11 10:20:21 2001
• Orig file: v2.4.14/linux/fs/intermezzo/journal_reiserfs.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.14/linux/fs/intermezzo/journal_reiserfs.c linux/fs/intermezzo/journal_reiserfs.c
@@ -0,0 +1,119 @@
+
+/*
+ * 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