1 files changed, 66 insertions, 0 deletions

diff --git a/fs/minix/itree_v2.c b/fs/minix/itree_v2.c
new file mode 100644
index 000000000000..3adc7675560f
--- /dev/null
+++ b/fs/minix/itree_v2.c
@@ -0,0 +1,66 @@
+#include <linux/buffer_head.h>
+#include "minix.h"
+
+enum {DIRECT = 7, DEPTH = 4};   /* Have triple indirect */
+
+typedef u32 block_t;    /* 32 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.i2_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) < 256) {
+                offsets[n++] = 7;
+                offsets[n++] = block;
+        } else if ((block -= 256) < 256*256) {
+                offsets[n++] = 8;
+                offsets[n++] = block>>8;
+                offsets[n++] = block & 255;
+        } else {
+                block -= 256*256;
+                offsets[n++] = 9;
+                offsets[n++] = block>>16;
+                offsets[n++] = (block>>8) & 255;
+                offsets[n++] = block & 255;
+        }
+        return n;
+}
+
+#include "itree_common.c"
+
+int V2_minix_get_block(struct inode * inode, long block,
+                        struct buffer_head *bh_result, int create)
+{
+        return get_block(inode, block, bh_result, create);
+}
+
+void V2_minix_truncate(struct inode * inode)
+{
+        truncate(inode);
+}
+
+unsigned V2_minix_blocks(loff_t size)
+{
+        return nblocks(size);
+}