ext2: No longer export ext2_fs.h to user space

Since the on-disk format has been stable for quite some time, users
should either use the headers provided by libext2fs or keep a private
copy of this header. For the full discussion, see this thread:

	https://lkml.org/lkml/2012/3/21/516

While at it, this commit removes all __KERNEL__ guards, which are now
unnecessary.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Jan Kara <jack@suse.cz>
Cc: Ted Ts'o <tytso@mit.edu>
Cc: Artem Bityutskiy <dedekind1@gmail.com>
Cc: Andreas Dilger <aedilger@gmail.com>
Cc: linux-ext4@vger.kernel.org

2 files changed, 10 insertions, 63 deletions

diff --git a/include/linux/Kbuild b/include/linux/Kbuild
index a4b5da2b83f5..d05df2810354 100644
--- a/include/linux/Kbuild
+++ b/include/linux/Kbuild
@@ -120,7 +120,6 @@ header-y += errno.h
 header-y += errqueue.h
 header-y += ethtool.h
 header-y += eventpoll.h
-header-y += ext2_fs.h
 header-y += fadvise.h
 header-y += falloc.h
 header-y += fanotify.h
diff --git a/include/linux/ext2_fs.h b/include/linux/ext2_fs.h
index ce1b719e8bd4..f28dba518a4a 100644
--- a/include/linux/ext2_fs.h
+++ b/include/linux/ext2_fs.h
@@ -20,6 +20,8 @@
 #include <linux/magic.h>
 #include <linux/fs.h>
 
+#include <linux/ext2_fs_sb.h>
+
 /*
  * The second extended filesystem constants/structures
  */
@@ -66,18 +68,10 @@
 /* First non-reserved inode for old ext2 filesystems */
 #define EXT2_GOOD_OLD_FIRST_INO 11
 
-#ifdef __KERNEL__
-#include <linux/ext2_fs_sb.h>
 static inline struct ext2_sb_info *EXT2_SB(struct super_block *sb)
 {
         return sb->s_fs_info;
 }
-#else
-/* Assume that user mode programs are passing in an ext2fs superblock, not
- * a kernel struct super_block.  This will allow us to call the feature-test
- * macros from user land. */
-#define EXT2_SB(sb)     (sb)
-#endif
 
 /*
  * Maximal count of links to a file
@@ -90,29 +84,12 @@ static inline struct ext2_sb_info *EXT2_SB(struct super_block *sb)
 #define EXT2_MIN_BLOCK_SIZE             1024
 #define EXT2_MAX_BLOCK_SIZE             4096
 #define EXT2_MIN_BLOCK_LOG_SIZE           10
-#ifdef __KERNEL__
-# define EXT2_BLOCK_SIZE(s)             ((s)->s_blocksize)
-#else
-# define EXT2_BLOCK_SIZE(s)             (EXT2_MIN_BLOCK_SIZE << (s)->s_log_block_size)
-#endif
+#define EXT2_BLOCK_SIZE(s)              ((s)->s_blocksize)
 #define EXT2_ADDR_PER_BLOCK(s)          (EXT2_BLOCK_SIZE(s) / sizeof (__u32))
-#ifdef __KERNEL__
-# define EXT2_BLOCK_SIZE_BITS(s)        ((s)->s_blocksize_bits)
-#else
-# define EXT2_BLOCK_SIZE_BITS(s)        ((s)->s_log_block_size + 10)
-#endif
-#ifdef __KERNEL__
+#define EXT2_BLOCK_SIZE_BITS(s)         ((s)->s_blocksize_bits)
 #define EXT2_ADDR_PER_BLOCK_BITS(s)     (EXT2_SB(s)->s_addr_per_block_bits)
 #define EXT2_INODE_SIZE(s)              (EXT2_SB(s)->s_inode_size)
 #define EXT2_FIRST_INO(s)               (EXT2_SB(s)->s_first_ino)
-#else
-#define EXT2_INODE_SIZE(s)      (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \
-                                 EXT2_GOOD_OLD_INODE_SIZE : \
-                                 (s)->s_inode_size)
-#define EXT2_FIRST_INO(s)       (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \
-                                 EXT2_GOOD_OLD_FIRST_INO : \
-                                 (s)->s_first_ino)
-#endif
 
 /*
  * Macro-instructions used to manage fragments
@@ -120,13 +97,8 @@ static inline struct ext2_sb_info *EXT2_SB(struct super_block *sb)
 #define EXT2_MIN_FRAG_SIZE              1024
 #define EXT2_MAX_FRAG_SIZE              4096
 #define EXT2_MIN_FRAG_LOG_SIZE            10
-#ifdef __KERNEL__
-# define EXT2_FRAG_SIZE(s)              (EXT2_SB(s)->s_frag_size)
-# define EXT2_FRAGS_PER_BLOCK(s)        (EXT2_SB(s)->s_frags_per_block)
-#else
-# define EXT2_FRAG_SIZE(s)              (EXT2_MIN_FRAG_SIZE << (s)->s_log_frag_size)
-# define EXT2_FRAGS_PER_BLOCK(s)        (EXT2_BLOCK_SIZE(s) / EXT2_FRAG_SIZE(s))
-#endif
+#define EXT2_FRAG_SIZE(s)               (EXT2_SB(s)->s_frag_size)
+#define EXT2_FRAGS_PER_BLOCK(s)         (EXT2_SB(s)->s_frags_per_block)
 
 /*
  * Structure of a blocks group descriptor
@@ -146,16 +118,10 @@ struct ext2_group_desc
 /*
  * Macro-instructions used to manage group descriptors
  */
-#ifdef __KERNEL__
-# define EXT2_BLOCKS_PER_GROUP(s)       (EXT2_SB(s)->s_blocks_per_group)
-# define EXT2_DESC_PER_BLOCK(s)         (EXT2_SB(s)->s_desc_per_block)
-# define EXT2_INODES_PER_GROUP(s)       (EXT2_SB(s)->s_inodes_per_group)
-# define EXT2_DESC_PER_BLOCK_BITS(s)    (EXT2_SB(s)->s_desc_per_block_bits)
-#else
-# define EXT2_BLOCKS_PER_GROUP(s)       ((s)->s_blocks_per_group)
-# define EXT2_DESC_PER_BLOCK(s)         (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_group_desc))
-# define EXT2_INODES_PER_GROUP(s)       ((s)->s_inodes_per_group)
-#endif
+#define EXT2_BLOCKS_PER_GROUP(s)        (EXT2_SB(s)->s_blocks_per_group)
+#define EXT2_DESC_PER_BLOCK(s)          (EXT2_SB(s)->s_desc_per_block)
+#define EXT2_INODES_PER_GROUP(s)        (EXT2_SB(s)->s_inodes_per_group)
+#define EXT2_DESC_PER_BLOCK_BITS(s)     (EXT2_SB(s)->s_desc_per_block_bits)
 
 /*
  * Constants relative to the data blocks
@@ -296,7 +262,6 @@ struct ext2_inode {
 
 #define i_size_high     i_dir_acl
 
-#if defined(__KERNEL__) || defined(__linux__)
 #define i_reserved1     osd1.linux1.l_i_reserved1
 #define i_frag          osd2.linux2.l_i_frag
 #define i_fsize         osd2.linux2.l_i_fsize
@@ -305,23 +270,6 @@ struct ext2_inode {
 #define i_uid_high      osd2.linux2.l_i_uid_high
 #define i_gid_high      osd2.linux2.l_i_gid_high
 #define i_reserved2     osd2.linux2.l_i_reserved2
-#endif
-
-#ifdef  __hurd__
-#define i_translator    osd1.hurd1.h_i_translator
-#define i_frag          osd2.hurd2.h_i_frag
-#define i_fsize         osd2.hurd2.h_i_fsize
-#define i_uid_high      osd2.hurd2.h_i_uid_high
-#define i_gid_high      osd2.hurd2.h_i_gid_high
-#define i_author        osd2.hurd2.h_i_author
-#endif
-
-#ifdef  __masix__
-#define i_reserved1     osd1.masix1.m_i_reserved1
-#define i_frag          osd2.masix2.m_i_frag
-#define i_fsize         osd2.masix2.m_i_fsize
-#define i_reserved2     osd2.masix2.m_i_reserved2
-#endif
 
 /*
  * File system states