patch-2.1.78 linux/fs/hfs/sysdep.c

• Lines: 53
• Date: Sun Jan 4 10:40:17 1998
• Orig file: v2.1.77/linux/fs/hfs/sysdep.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.77/linux/fs/hfs/sysdep.c linux/fs/hfs/sysdep.c
@@ -0,0 +1,52 @@
+/*
+ * linux/fs/hfs/sysdep.c
+ *
+ * Copyright (C) 1996  Paul H. Hargrove
+ * This file may be distributed under the terms of the GNU Public License.
+ *
+ * This file contains the code to do various system dependent things.
+ *
+ * "XXX" in a comment is a note to myself to consider changing something.
+ *
+ * In function preconditions the term "valid" applied to a pointer to
+ * a structure means that the pointer is non-NULL and the structure it
+ * points to has all fields initialized to consistent values.
+ */
+
+#include "hfs.h"
+#include <linux/hfs_fs_sb.h>
+#include <linux/hfs_fs_i.h>
+#include <linux/hfs_fs.h>
+
+/*
+ * hfs_buffer_get()
+ *
+ * Return a buffer for the 'block'th block of the media.
+ * If ('read'==0) then the buffer is not read from disk.
+ */
+hfs_buffer hfs_buffer_get(hfs_sysmdb sys_mdb, int block, int read) {
+	hfs_buffer tmp = HFS_BAD_BUFFER;
+
+	if (read) {
+		tmp = bread(sys_mdb->s_dev, block, HFS_SECTOR_SIZE);
+	} else {
+		tmp = getblk(sys_mdb->s_dev, block, HFS_SECTOR_SIZE);
+		if (tmp) {
+			mark_buffer_uptodate(tmp, 1);
+		}
+	}
+	if (!tmp) {
+		hfs_error("hfs_fs: unable to read block 0x%08x from dev %s\n",
+			  block, hfs_mdb_name(sys_mdb));
+	}
+
+	return tmp;
+}
+
+/* catalog.c needs a re-write. as a kludge, we throw away all of 
+ * the dcache if we need more entries. */
+int hfs_prune_entry(struct hfs_cat_entry *entry)
+{
+        shrink_dcache_sb(entry->mdb->sys_mdb);
+	return 1;
+}