Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2:
  nilfs2: move NILFS_SUPER_MAGIC to linux/magic.h
  nilfs2: get rid of nilfs_sb_info structure
  nilfs2: use sb instance instead of nilfs_sb_info struct
  nilfs2: get rid of sc_sbi back pointer
  nilfs2: move log writer onto nilfs object
  nilfs2: move next generation counter into nilfs object
  nilfs2: move s_inode_lock and s_dirty_files into nilfs object
  nilfs2: move parameters on nilfs_sb_info into nilfs object
  nilfs2: move mount options to nilfs object
  nilfs2: record used amount of each checkpoint in checkpoint list
  nilfs2: optimize rec_len functions
  nilfs2: append blocksize info to warnings during loading super blocks
  nilfs2: add compat ioctl
  nilfs2: implement FS_IOC_GETFLAGS/SETFLAGS/GETVERSION
  nilfs2: tighten restrictions on inode flags
  nilfs2: mark S_NOATIME on inodes only if NOATIME attribute is set
  nilfs2: use common file attribute macros
  nilfs2: add free entries count only if clear bit operation succeeded
  nilfs2: decrement inodes count only if raw inode was successfully deleted

2 files changed, 10 insertions, 23 deletions

diff --git a/include/linux/magic.h b/include/linux/magic.h
index 6cfe344f955..1e5df2af8d8 100644
--- a/include/linux/magic.h
+++ b/include/linux/magic.h
@@ -23,6 +23,7 @@
 #define XENFS_SUPER_MAGIC	0xabba1974
 #define EXT4_SUPER_MAGIC	0xEF53
 #define BTRFS_SUPER_MAGIC	0x9123683E
+#define NILFS_SUPER_MAGIC	0x3434
 #define HPFS_SUPER_MAGIC	0xf995e849
 #define ISOFS_SUPER_MAGIC	0x9660
 #define JFFS2_SUPER_MAGIC	0x72b6
diff --git a/include/linux/nilfs2_fs.h b/include/linux/nilfs2_fs.h
index 227e49dd572..8768c469e93 100644
--- a/include/linux/nilfs2_fs.h
+++ b/include/linux/nilfs2_fs.h
@@ -40,26 +40,7 @@
 
 #include <linux/types.h>
 #include <linux/ioctl.h>
-
-/*
- * Inode flags stored in nilfs_inode and on-memory nilfs inode
- *
- * We define these flags based on ext2-fs because of the
- * compatibility reason; to avoid problems in chattr(1)
- */
-#define NILFS_SECRM_FL		0x00000001 /* Secure deletion */
-#define NILFS_UNRM_FL		0x00000002 /* Undelete */
-#define NILFS_SYNC_FL		0x00000008 /* Synchronous updates */
-#define NILFS_IMMUTABLE_FL	0x00000010 /* Immutable file */
-#define NILFS_APPEND_FL		0x00000020 /* writes to file may only append */
-#define NILFS_NODUMP_FL		0x00000040 /* do not dump file */
-#define NILFS_NOATIME_FL	0x00000080 /* do not update atime */
-/* Reserved for compression usage... */
-#define NILFS_NOTAIL_FL		0x00008000 /* file tail should not be merged */
-#define NILFS_DIRSYNC_FL	0x00010000 /* dirsync behaviour */
-
-#define NILFS_FL_USER_VISIBLE	0x0003DFFF /* User visible flags */
-#define NILFS_FL_USER_MODIFIABLE	0x000380FF /* User modifiable flags */
+#include <linux/magic.h>
 
 
 #define NILFS_INODE_BMAP_SIZE	7
@@ -236,8 +217,10 @@ struct nilfs_super_block {
  * If there is a bit set in the incompatible feature set that the kernel
  * doesn't know about, it should refuse to mount the filesystem.
  */
+#define NILFS_FEATURE_COMPAT_RO_BLOCK_COUNT	0x00000001ULL
+
 #define NILFS_FEATURE_COMPAT_SUPP	0ULL
-#define NILFS_FEATURE_COMPAT_RO_SUPP	0ULL
+#define NILFS_FEATURE_COMPAT_RO_SUPP	NILFS_FEATURE_COMPAT_RO_BLOCK_COUNT
 #define NILFS_FEATURE_INCOMPAT_SUPP	0ULL
 
 /*
@@ -260,7 +243,6 @@ struct nilfs_super_block {
 #define NILFS_USER_INO		11	/* Fisrt user's file inode number */
 
 #define NILFS_SB_OFFSET_BYTES	1024	/* byte offset of nilfs superblock */
-#define NILFS_SUPER_MAGIC	0x3434	/* NILFS filesystem  magic number */
 
 #define NILFS_SEG_MIN_BLOCKS	16	/* Minimum number of blocks in
 					   a full segment */
@@ -346,17 +328,21 @@ static inline unsigned nilfs_rec_len_from_disk(__le16 dlen)
 {
 	unsigned len = le16_to_cpu(dlen);
 
+#if !defined(__KERNEL__) || (PAGE_CACHE_SIZE >= 65536)
 	if (len == NILFS_MAX_REC_LEN)
 		return 1 << 16;
+#endif
 	return len;
 }
 
 static inline __le16 nilfs_rec_len_to_disk(unsigned len)
 {
+#if !defined(__KERNEL__) || (PAGE_CACHE_SIZE >= 65536)
 	if (len == (1 << 16))
 		return cpu_to_le16(NILFS_MAX_REC_LEN);
 	else if (len > (1 << 16))
 		BUG();
+#endif
 	return cpu_to_le16(len);
 }
 
@@ -525,7 +511,7 @@ struct nilfs_checkpoint {
 	__le64 cp_create;
 	__le64 cp_nblk_inc;
 	__le64 cp_inodes_count;
-	__le64 cp_blocks_count;		/* Reserved (might be deleted) */
+	__le64 cp_blocks_count;
 
 	/* Do not change the byte offset of ifile inode.
 	   To keep the compatibility of the disk format,