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-rw-r--r--fs/minix/itree_v1.c61
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 0000000..ba06aef
--- /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);
+}