1 files changed, 61 insertions, 0 deletions

diff --git a/fs/minix/itree_v1.c b/fs/minix/itree_v1.c
new file mode 100644
index 000000000000..ba06aef4aca1
--- /dev/null
+++ b/fs/minix/itree_v1.c
@@ -0,0 +1,61 @@
+#include <linux/buffer_head.h>
+#include "minix.h"
+
+enum {DEPTH = 3, DIRECT = 7};   /* Only double indirect */
+
+typedef u16 block_t;    /* 16 bit, host order */
+
+static inline unsigned long block_to_cpu(block_t n)
+{
+        return n;
+}
+
+static inline block_t cpu_to_block(unsigned long n)
+{
+        return n;
+}
+
+static inline block_t *i_data(struct inode *inode)
+{
+        return (block_t *)minix_i(inode)->u.i1_data;
+}
+
+static int block_to_path(struct inode * inode, long block, int offsets[DEPTH])
+{
+        int n = 0;
+
+        if (block < 0) {
+                printk("minix_bmap: block<0");
+        } else if (block >= (minix_sb(inode->i_sb)->s_max_size/BLOCK_SIZE)) {
+                printk("minix_bmap: block>big");
+        } else if (block < 7) {
+                offsets[n++] = block;
+        } else if ((block -= 7) < 512) {
+                offsets[n++] = 7;
+                offsets[n++] = block;
+        } else {
+                block -= 512;
+                offsets[n++] = 8;
+                offsets[n++] = block>>9;
+                offsets[n++] = block & 511;
+        }
+        return n;
+}
+
+#include "itree_common.c"
+
+int V1_minix_get_block(struct inode * inode, long block,
+                        struct buffer_head *bh_result, int create)
+{
+        return get_block(inode, block, bh_result, create);
+}
+
+void V1_minix_truncate(struct inode * inode)
+{
+        truncate(inode);
+}
+
+unsigned V1_minix_blocks(loff_t size)
+{
+        return nblocks(size);
+}