nilfs2: move ioctl interface and disk layout to uapi separately

The header file "include/linux/nilfs2_fs.h" is composed of parts for
ioctl and disk format, and both are intended to be shared with user
space programs.

This moves them to the uapi directory "include/uapi/linux" splitting the
file to "nilfs2_api.h" and "nilfs2_ondisk.h".  The following minor
changes are accompanied by this migration:

 - nilfs_direct_node struct in nilfs2/direct.h is converged to
   nilfs2_ondisk.h because it's an on-disk structure.
 - inline functions nilfs_rec_len_from_disk() and
   nilfs_rec_len_to_disk() are moved to nilfs2/dir.c.

Link: http://lkml.kernel.org/r/1465825507-3407-4-git-send-email-konishi.ryusuke@lab.ntt.co.jp
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

13 files changed, 29 insertions, 20 deletions

diff --git a/fs/nilfs2/bmap.h b/fs/nilfs2/bmap.h
index b6a4c8f9..2b6ffbe 100644
--- a/fs/nilfs2/bmap.h
+++ b/fs/nilfs2/bmap.h
@@ -22,7 +22,7 @@
 #include <linux/types.h>
 #include <linux/fs.h>
 #include <linux/buffer_head.h>
-#include <linux/nilfs2_fs.h>
+#include <linux/nilfs2_ondisk.h>	/* nilfs_binfo, nilfs_inode, etc */
 #include "alloc.h"
 #include "dat.h"
 
diff --git a/fs/nilfs2/btree.h b/fs/nilfs2/btree.h
index df1a25f..2184e47 100644
--- a/fs/nilfs2/btree.h
+++ b/fs/nilfs2/btree.h
@@ -22,7 +22,7 @@
 #include <linux/types.h>
 #include <linux/buffer_head.h>
 #include <linux/list.h>
-#include <linux/nilfs2_fs.h>
+#include <linux/nilfs2_ondisk.h>	/* nilfs_btree_node */
 #include "btnode.h"
 #include "bmap.h"
 
diff --git a/fs/nilfs2/cpfile.c b/fs/nilfs2/cpfile.c
index 19d9f4a..a15a160 100644
--- a/fs/nilfs2/cpfile.c
+++ b/fs/nilfs2/cpfile.c
@@ -21,7 +21,6 @@
 #include <linux/string.h>
 #include <linux/buffer_head.h>
 #include <linux/errno.h>
-#include <linux/nilfs2_fs.h>
 #include "mdt.h"
 #include "cpfile.h"
 
diff --git a/fs/nilfs2/cpfile.h b/fs/nilfs2/cpfile.h
index 0249744..6eca972 100644
--- a/fs/nilfs2/cpfile.h
+++ b/fs/nilfs2/cpfile.h
@@ -21,7 +21,8 @@
 
 #include <linux/fs.h>
 #include <linux/buffer_head.h>
-#include <linux/nilfs2_fs.h>
+#include <linux/nilfs2_api.h>		/* nilfs_cpstat */
+#include <linux/nilfs2_ondisk.h>	/* nilfs_inode, nilfs_checkpoint */
 
 
 int nilfs_cpfile_get_checkpoint(struct inode *, __u64, int,
diff --git a/fs/nilfs2/dat.h b/fs/nilfs2/dat.h
index abbfdab..57dc6cf 100644
--- a/fs/nilfs2/dat.h
+++ b/fs/nilfs2/dat.h
@@ -22,6 +22,7 @@
 #include <linux/types.h>
 #include <linux/buffer_head.h>
 #include <linux/fs.h>
+#include <linux/nilfs2_ondisk.h>	/* nilfs_inode, nilfs_checkpoint */
 
 
 struct nilfs_palloc_req;
diff --git a/fs/nilfs2/dir.c b/fs/nilfs2/dir.c
index 746956d..908ebbf 100644
--- a/fs/nilfs2/dir.c
+++ b/fs/nilfs2/dir.c
@@ -42,6 +42,28 @@
 #include "nilfs.h"
 #include "page.h"
 
+static inline unsigned int nilfs_rec_len_from_disk(__le16 dlen)
+{
+	unsigned int len = le16_to_cpu(dlen);
+
+#if (PAGE_SIZE >= 65536)
+	if (len == NILFS_MAX_REC_LEN)
+		return 1 << 16;
+#endif
+	return len;
+}
+
+static inline __le16 nilfs_rec_len_to_disk(unsigned int len)
+{
+#if (PAGE_SIZE >= 65536)
+	if (len == (1 << 16))
+		return cpu_to_le16(NILFS_MAX_REC_LEN);
+
+	BUG_ON(len > (1 << 16));
+#endif
+	return cpu_to_le16(len);
+}
+
 /*
  * nilfs uses block-sized chunks. Arguably, sector-sized ones would be
  * more robust, but we have what we have
diff --git a/fs/nilfs2/direct.h b/fs/nilfs2/direct.h
index 3015a6e..cfe85e8 100644
--- a/fs/nilfs2/direct.h
+++ b/fs/nilfs2/direct.h
@@ -24,16 +24,6 @@
 #include "bmap.h"
 
 
-/**
- * struct nilfs_direct_node - direct node
- * @dn_flags: flags
- * @dn_pad: padding
- */
-struct nilfs_direct_node {
-	__u8 dn_flags;
-	__u8 pad[7];
-};
-
 #define NILFS_DIRECT_NBLOCKS	(NILFS_BMAP_SIZE / sizeof(__le64) - 1)
 #define NILFS_DIRECT_KEY_MIN	0
 #define NILFS_DIRECT_KEY_MAX	(NILFS_DIRECT_NBLOCKS - 1)
diff --git a/fs/nilfs2/ifile.h b/fs/nilfs2/ifile.h
index 23ad2f0..188b94f 100644
--- a/fs/nilfs2/ifile.h
+++ b/fs/nilfs2/ifile.h
@@ -23,7 +23,6 @@
 
 #include <linux/fs.h>
 #include <linux/buffer_head.h>
-#include <linux/nilfs2_fs.h>
 #include "mdt.h"
 #include "alloc.h"
 
diff --git a/fs/nilfs2/ioctl.c b/fs/nilfs2/ioctl.c
index 827283f..f1d7989 100644
--- a/fs/nilfs2/ioctl.c
+++ b/fs/nilfs2/ioctl.c
@@ -25,7 +25,6 @@
 #include <linux/compat.h>	/* compat_ptr() */
 #include <linux/mount.h>	/* mnt_want_write_file(), mnt_drop_write_file() */
 #include <linux/buffer_head.h>
-#include <linux/nilfs2_fs.h>
 #include "nilfs.h"
 #include "segment.h"
 #include "bmap.h"
diff --git a/fs/nilfs2/nilfs.h b/fs/nilfs2/nilfs.h
index 2ba8a14..33f8c8f 100644
--- a/fs/nilfs2/nilfs.h
+++ b/fs/nilfs2/nilfs.h
@@ -23,7 +23,8 @@
 #include <linux/buffer_head.h>
 #include <linux/spinlock.h>
 #include <linux/blkdev.h>
-#include <linux/nilfs2_fs.h>
+#include <linux/nilfs2_api.h>
+#include <linux/nilfs2_ondisk.h>
 #include "the_nilfs.h"
 #include "bmap.h"
 
diff --git a/fs/nilfs2/segment.h b/fs/nilfs2/segment.h
index 6565c10..1060949 100644
--- a/fs/nilfs2/segment.h
+++ b/fs/nilfs2/segment.h
@@ -23,7 +23,6 @@
 #include <linux/fs.h>
 #include <linux/buffer_head.h>
 #include <linux/workqueue.h>
-#include <linux/nilfs2_fs.h>
 #include "nilfs.h"
 
 struct nilfs_root;
diff --git a/fs/nilfs2/sufile.c b/fs/nilfs2/sufile.c
index 12d11de..1541a1e 100644
--- a/fs/nilfs2/sufile.c
+++ b/fs/nilfs2/sufile.c
@@ -22,7 +22,6 @@
 #include <linux/string.h>
 #include <linux/buffer_head.h>
 #include <linux/errno.h>
-#include <linux/nilfs2_fs.h>
 #include "mdt.h"
 #include "sufile.h"
 
diff --git a/fs/nilfs2/sufile.h b/fs/nilfs2/sufile.h
index 46e8987..158a919 100644
--- a/fs/nilfs2/sufile.h
+++ b/fs/nilfs2/sufile.h
@@ -21,7 +21,6 @@
 
 #include <linux/fs.h>
 #include <linux/buffer_head.h>
-#include <linux/nilfs2_fs.h>
 #include "mdt.h"