Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / fs / minix / itree_v1.c

diff --git a/kernel/fs/minix/itree_v1.c b/kernel/fs/minix/itree_v1.c
new file mode 100644 (file)
index 0000000..282e15a
--- /dev/null
+++ b/kernel/fs/minix/itree_v1.c
@@ -0,0 +1,67 @@
+#include <linux/buffer_head.h>
+#include <linux/slab.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;
+       char b[BDEVNAME_SIZE];
+
+       if (block < 0) {
+               printk("MINIX-fs: block_to_path: block %ld < 0 on dev %s\n",
+                       block, bdevname(inode->i_sb->s_bdev, b));
+       } else if (block >= (minix_sb(inode->i_sb)->s_max_size/BLOCK_SIZE)) {
+               if (printk_ratelimit())
+                       printk("MINIX-fs: block_to_path: "
+                              "block %ld too big on dev %s\n",
+                               block, bdevname(inode->i_sb->s_bdev, b));
+       } 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, struct super_block *sb)
+{
+       return nblocks(size, sb);
+}