src/file_xfs.c: add Frama-C annotations

src/xfs_struct.h: move structure from src/xfs.h

4 files changed, 184 insertions, 124 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
index 4fbb3c94..d1508ccd 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -42,7 +42,7 @@ base_C			= $(smallbase_C) autoset.c ewf.c fnctdsk.c hdaccess.c hdcache.c hdwin32
 base_H			= $(smallbase_H) alignio.h autoset.h ewf.h fnctdsk.h hdaccess.h hdwin32.h hidden.h guid_cmp.h guid_cpy.h hdcache.h hpa_dco.h intrf.h iso.h iso9660.h lang.h list.h list_sort.h log_part.h types.h io_redir.h msdos.h ntfs_utl.h parti386.h partgpt.h parthumax.h partmac.h partsun.h partxbox.h partauto.h sudo.h unicode.h win32.h
 
 fs_C			= analyse.c bfs.c bsd.c btrfs.c cramfs.c exfat.c ext2.c fat.c fatx.c f2fs.c jfs.c gfs2.c hfs.c hfsp.c hpfs.c luks.c lvm.c md.c netware.c ntfs.c refs.c rfs.c savehdr.c sun.c swap.c sysv.c ufs.c vmfs.c wbfs.c xfs.c zfs.c
-fs_H			= analyse.h bfs.h bsd.h btrfs.h cramfs.h exfat.h ext2.h fat.h fatx.h f2fs.h f2fs_fs.h jfs_superblock.h jfs.h gfs2.h hfs.h hfsp.h hpfs.h hfsp_struct.h luks.h luks_struct.h lvm.h md.h netware.h ntfs.h ntfs_struct.h refs.h rfs.h savehdr.h sun.h swap.h sysv.h ufs.h vmfs.h wbfs.h xfs.h zfs.h
+fs_H			= analyse.h bfs.h bsd.h btrfs.h cramfs.h exfat.h ext2.h fat.h fatx.h f2fs.h f2fs_fs.h jfs_superblock.h jfs.h gfs2.h hfs.h hfsp.h hpfs.h hfsp_struct.h luks.h luks_struct.h lvm.h md.h netware.h ntfs.h ntfs_struct.h refs.h rfs.h savehdr.h sun.h swap.h sysv.h ufs.h vmfs.h wbfs.h xfs.h xfs_struct.h zfs.h
 
 testdisk_ncurses_C	= addpart.c addpartn.c adv.c askloc.c chgarch.c chgarchn.c chgtype.c chgtypen.c dimage.c dirn.c dirpart.c diskacc.c diskcapa.c edit.c ext2_sb.c ext2_sbn.c fat1x.c fat32.c fat_adv.c fat_cluster.c fatn.c geometry.c geometryn.c godmode.c hiddenn.c intrface.c intrfn.c nodisk.c ntfs_adv.c ntfs_fix.c ntfs_udl.c parti386n.c partgptn.c partmacn.c partsunn.c partxboxn.c tanalyse.c tbanner.c tdelete.c tdiskop.c tdisksel.c testdisk.c texfat.c thfs.c tload.c tlog.c tmbrcode.c tntfs.c toptions.c tpartwr.c 
 testdisk_ncurses_H	= addpart.h addpartn.h adv.h askloc.h chgarch.h chgarchn.h chgtype.h chgtypen.h dimage.h dirn.h dirpart.h diskacc.h diskcapa.h edit.h ext2_sb.h ext2_sbn.h fat1x.h fat32.h fat_adv.h fat_cluster.h fatn.h geometry.h geometryn.h godmode.h hiddenn.h intrface.h intrfn.h nodisk.h ntfs_adv.h ntfs_fix.h ntfs_udl.h partgptn.h parti386n.h partmacn.h partsunn.h partxboxn.h tanalyse.h tdelete.h tdiskop.h tdisksel.h texfat.h thfs.h tload.h tlog.h tmbrcode.h tntfs.h toptions.h tpartwr.h
@@ -390,7 +390,7 @@ file_C			= filegen.c \
 			  file_zpr.c \
 			  utfsize.c
 
-file_H			= ext2.h hfsp_struct.h filegen.h file_doc.h file_jpg.h file_gz.h file_riff.h file_sp3.h file_tar.h file_tiff.h luks_struct.h ntfs_struct.h ole.h pe.h suspend.h utfsize.h
+file_H			= ext2.h hfsp_struct.h filegen.h file_doc.h file_jpg.h file_gz.h file_riff.h file_sp3.h file_tar.h file_tiff.h luks_struct.h ntfs_struct.h ole.h pe.h suspend.h utfsize.h xfs_struct.h
 
 photorec_C		= photorec.c phcfg.c addpart.c chgarch.c chgtype.c dir.c exfatp.c ext2grp.c ext2_dir.c ext2p.c fat_dir.c fatp.c file_found.c geometry.c ntfs_dir.c ntfsp.c pdisksel.c poptions.c sessionp.c dfxml.c partgptro.c
 
diff --git a/src/file_xfs.c b/src/file_xfs.c
index 52fd7820..a309fbdd 100644
--- a/src/file_xfs.c
+++ b/src/file_xfs.c
@@ -30,55 +30,71 @@
 #include <stdio.h>
 #include "types.h"
 #include "common.h"
-#include "xfs.h"
+#include "xfs_struct.h"
 #include "filegen.h"
 
+/*@ requires \valid(file_stat); */
 static void register_header_check_xfs(file_stat_t *file_stat);
-static int header_check_xfs_sb(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new);
-
-const file_hint_t file_hint_xfs= {
-  .extension="xfs",
-  .description="xfs structure",
-  .max_filesize=0,
-  .recover=1,
-  .enable_by_default=1,
-  .register_header_check=&register_header_check_xfs
+
+const file_hint_t file_hint_xfs = {
+  .extension = "xfs",
+  .description = "xfs structure",
+  .max_filesize = 0,
+  .recover = 1,
+  .enable_by_default = 1,
+  .register_header_check = &register_header_check_xfs
 };
 
+/*@
+  @ requires buffer_size >= sizeof(struct xfs_sb);
+  @ requires \valid_read(buffer+(0..buffer_size-1));
+  @ requires valid_file_recovery(file_recovery);
+  @ requires \valid(file_recovery_new);
+  @ requires file_recovery_new->blocksize > 0;
+  @ requires separation: \separated(&file_hint_xfs, buffer+(..), file_recovery, file_recovery_new);
+  @ ensures  \result!=0 ==> valid_file_recovery(file_recovery_new);
+  @ assigns  *file_recovery_new;
+  @*/
 static int header_check_xfs_sb(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new)
 {
-  const struct xfs_sb *sb=(const struct xfs_sb *)buffer;
-  const unsigned int sb_blocksize=be32(sb->sb_blocksize);
-  if( sb->sb_sectlog >= 16 ||
-      sb->sb_inodelog >= 16 ||
-      sb->sb_blocklog >= 16)
+  const struct xfs_sb *sb = (const struct xfs_sb *)buffer;
+  const unsigned int sb_blocksize = be32(sb->sb_blocksize);
+  if(sb->sb_sectlog >= 16 || sb->sb_inodelog >= 16 || sb->sb_blocklog >= 16)
     return 0;
-  if(sb->sb_magicnum!=be32(XFS_SB_MAGIC) ||
-      be16(sb->sb_sectsize)  != (1U << sb->sb_sectlog) ||
-      sb_blocksize != (1U << sb->sb_blocklog) ||
-      be16(sb->sb_inodesize) != (1U << sb->sb_inodelog))
+  if(sb->sb_magicnum != be32(XFS_SB_MAGIC) || be16(sb->sb_sectsize) != (1U << sb->sb_sectlog) || sb_blocksize != (1U << sb->sb_blocklog) || be16(sb->sb_inodesize) != (1U << sb->sb_inodelog))
     return 0;
   reset_file_recovery(file_recovery_new);
-  file_recovery_new->extension=file_hint_xfs.extension;
-  file_recovery_new->calculated_file_size=sb_blocksize;
-  file_recovery_new->data_check=&data_check_size;
-  file_recovery_new->file_check=&file_check_size;
+  file_recovery_new->extension = file_hint_xfs.extension;
+  file_recovery_new->calculated_file_size = sb_blocksize;
+  file_recovery_new->data_check = &data_check_size;
+  file_recovery_new->file_check = &file_check_size;
   return 1;
 }
 
+/*@ assigns \nothing; */
 static data_check_t data_check_stopasap(const unsigned char *buffer, const unsigned int buffer_size, file_recovery_t *file_recovery)
 {
   return DC_STOP;
 }
 
+/*@
+  @ requires buffer_size > 0;
+  @ requires \valid_read(buffer+(0..buffer_size-1));
+  @ requires valid_file_recovery(file_recovery);
+  @ requires \valid(file_recovery_new);
+  @ requires file_recovery_new->blocksize > 0;
+  @ requires separation: \separated(&file_hint_xfs, buffer+(..), file_recovery, file_recovery_new);
+  @ ensures  \result!=0 ==> valid_file_recovery(file_recovery_new);
+  @ assigns  *file_recovery_new;
+  @*/
 static int header_save_xfs(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new)
 {
-  if(safe_header_only>0)
+  if(safe_header_only > 0)
     return 0;
   reset_file_recovery(file_recovery_new);
-  file_recovery_new->extension=file_hint_xfs.extension;
-  file_recovery_new->data_check=&data_check_stopasap;
-  file_recovery_new->min_filesize=512;
+  file_recovery_new->extension = file_hint_xfs.extension;
+  file_recovery_new->data_check = &data_check_stopasap;
+  file_recovery_new->min_filesize = 512;
   return 1;
 }
 
@@ -88,9 +104,9 @@ typedef struct xfs_timestamp
   int32_t t_nsec;
 } xfs_timestamp_t;
 
-typedef int64_t xfs_fsize_t;    /* bytes in a file */
-typedef int32_t xfs_extnum_t;   /* # of extents in a file */
-typedef int16_t xfs_aextnum_t;  /* # extents in an attribute fork */
+typedef int64_t xfs_fsize_t;   /* bytes in a file */
+typedef int32_t xfs_extnum_t;  /* # of extents in a file */
+typedef int16_t xfs_aextnum_t; /* # extents in an attribute fork */
 
 typedef struct xfs_dinode_core
 {
@@ -121,31 +137,36 @@ typedef struct xfs_dinode_core
   uint32_t di_gen;
 } xfs_dinode_core_t;
 
+/*@
+  @ requires buffer_size >= sizeof(xfs_dinode_core_t);
+  @ requires \valid_read(buffer+(0..buffer_size-1));
+  @ requires valid_file_recovery(file_recovery);
+  @ requires \valid(file_recovery_new);
+  @ requires file_recovery_new->blocksize > 0;
+  @ requires separation: \separated(&file_hint_xfs, buffer+(..), file_recovery, file_recovery_new);
+  @ ensures  \result!=0 ==> valid_file_recovery(file_recovery_new);
+  @ assigns  *file_recovery_new;
+  @*/
 static int header_check_xfs_inode(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new)
 {
-  const xfs_dinode_core_t *inode=(const xfs_dinode_core_t *)buffer;
-  if(safe_header_only>0)
+  const xfs_dinode_core_t *inode = (const xfs_dinode_core_t *)buffer;
+  if(safe_header_only > 0)
     return 0;
-  if(inode->di_version!=2 ||
-      inode->di_pad[0]!=0 || inode->di_pad[1]!=0 ||
-      inode->di_pad[2]!=0 || inode->di_pad[3]!=0 ||
-      inode->di_pad[4]!=0 || inode->di_pad[5]!=0 ||
-      inode->di_pad[6]!=0 || inode->di_pad[7]!=0)
+  if(inode->di_version != 2 || inode->di_pad[0] != 0 || inode->di_pad[1] != 0 || inode->di_pad[2] != 0 || inode->di_pad[3] != 0 || inode->di_pad[4] != 0 || inode->di_pad[5] != 0 || inode->di_pad[6] != 0 || inode->di_pad[7] != 0)
     return 0;
   reset_file_recovery(file_recovery_new);
-  file_recovery_new->extension=file_hint_xfs.extension;
-  file_recovery_new->data_check=&data_check_stopasap;
+  file_recovery_new->extension = file_hint_xfs.extension;
+  file_recovery_new->data_check = &data_check_stopasap;
   return 1;
 }
 
-
 static void register_header_check_xfs(file_stat_t *file_stat)
 {
-  static const unsigned char xagf[8]={'X','A','G','F', 0,0,0,1};
-  static const unsigned char xagi[8]={'X','A','G','I', 0,0,0,1};
-  static const unsigned char abtb[8]={'A','B','T','B', 0,0,0,1};
-  static const unsigned char abtc[8]={'A','B','T','C', 0,0,0,1};
-  static const unsigned char iabt[8]={'I','A','B','T', 0,0,0,1};
+  static const unsigned char xagf[8] = { 'X', 'A', 'G', 'F', 0, 0, 0, 1 };
+  static const unsigned char xagi[8] = { 'X', 'A', 'G', 'I', 0, 0, 0, 1 };
+  static const unsigned char abtb[8] = { 'A', 'B', 'T', 'B', 0, 0, 0, 1 };
+  static const unsigned char abtc[8] = { 'A', 'B', 'T', 'C', 0, 0, 0, 1 };
+  static const unsigned char iabt[8] = { 'I', 'A', 'B', 'T', 0, 0, 0, 1 };
   register_header_check(0, "XFSB", 4, &header_check_xfs_sb, file_stat);
   register_header_check(0, xagf, 8, &header_save_xfs, file_stat);
   register_header_check(0, xagi, 8, &header_save_xfs, file_stat);
diff --git a/src/xfs.h b/src/xfs.h
index dbd654be..f55d1498 100644
--- a/src/xfs.h
+++ b/src/xfs.h
@@ -22,6 +22,7 @@
  *
  */
 
+#include "xfs_struct.h"
 /*
  * Super block
  * Fits into a sector-sized buffer at address 0 of each allocation group.
@@ -33,83 +34,6 @@
 extern "C" {
 #endif
 
-#define XFS_SUPERBLOCK_SIZE	512
-
-#define	XFS_SB_MAGIC		0x58465342	/* 'XFSB' */
-#define	XFS_SB_VERSION_1	1		/* 5.3, 6.0.1, 6.1 */
-#define	XFS_SB_VERSION_2	2		/* 6.2 - attributes */
-#define	XFS_SB_VERSION_3	3		/* 6.2 - new inode version */
-#define	XFS_SB_VERSION_4	4		/* 6.2+ - bitmask version */
-#define	XFS_SB_VERSION_5	5		/* CRC enabled filesystem */
-#define XFS_SB_VERSION_NUMBITS          0x000f
-
-typedef	uint32_t	xfs_extlen_t;	/* extent length in blocks */
-typedef uint64_t	xfs_drfsbno_t;	/* blockno in filesystem (raw) */
-typedef	uint64_t	xfs_drtbno_t;	/* extent (block) in realtime area */
-typedef uint64_t	xfs_ino_t;	/* <inode> type */
-typedef uint32_t	xfs_agblock_t;	/* blockno in alloc. group */
-typedef	uint32_t	xfs_agnumber_t;	/* allocation group number */
-typedef uint64_t        xfs_dfsbno_t;
-
-struct xfs_sb
-{
-	uint32_t	sb_magicnum;	/* magic number == XFS_SB_MAGIC */
-	uint32_t	sb_blocksize;	/* logical block size, bytes */
-	xfs_drfsbno_t	sb_dblocks;	/* number of data blocks */
-	xfs_drfsbno_t	sb_rblocks;	/* number of realtime blocks */
-	xfs_drtbno_t	sb_rextents;	/* number of realtime extents */
-	uint8_t		sb_uuid[16];	/* file system unique id */
-	xfs_dfsbno_t	sb_logstart;	/* starting block of log if internal */
-	xfs_ino_t	sb_rootino;	/* root inode number */
-	xfs_ino_t	sb_rbmino;	/* bitmap inode for realtime extents */
-	xfs_ino_t	sb_rsumino;	/* summary inode for rt bitmap */
-	xfs_agblock_t	sb_rextsize;	/* realtime extent size, blocks */
-	xfs_agblock_t	sb_agblocks;	/* size of an allocation group */
-	xfs_agnumber_t	sb_agcount;	/* number of allocation groups */
-	xfs_extlen_t	sb_rbmblocks;	/* number of rt bitmap blocks */
-	xfs_extlen_t	sb_logblocks;	/* number of log blocks */
-	uint16_t	sb_versionnum;	/* header version == XFS_SB_VERSION */
-	uint16_t	sb_sectsize;	/* volume sector size, bytes */
-	uint16_t	sb_inodesize;	/* inode size, bytes */
-	uint16_t	sb_inopblock;	/* inodes per block */
-	char		sb_fname[12];	/* file system name */
-	uint8_t	sb_blocklog;	/* log2 of sb_blocksize */
-	uint8_t	sb_sectlog;	/* log2 of sb_sectsize */
-	uint8_t	sb_inodelog;	/* log2 of sb_inodesize */
-	uint8_t	sb_inopblog;	/* log2 of sb_inopblock */
-	uint8_t	sb_agblklog;	/* log2 of sb_agblocks (rounded up) */
-	uint8_t	sb_rextslog;	/* log2 of sb_rextents */
-	uint8_t	sb_inprogress;	/* mkfs is in progress, don't mount */
-	uint8_t	sb_imax_pct;	/* max % of fs for inode space */
-					/* statistics */
-	/*
-	 * These fields must remain contiguous.  If you really
-	 * want to change their layout, make sure you fix the
-	 * code in xfs_trans_apply_sb_deltas().
-	 */
-	uint64_t	sb_icount;	/* allocated inodes */
-	uint64_t	sb_ifree;	/* free inodes */
-	uint64_t	sb_fdblocks;	/* free data blocks */
-	uint64_t	sb_frextents;	/* free realtime extents */
-	/*
-	 * End contiguous fields.
-	 */
-	xfs_ino_t	sb_uquotino;	/* user quota inode */
-	xfs_ino_t	sb_gquotino;	/* group quota inode */
-	uint16_t	sb_qflags;	/* quota flags */
-	uint8_t	sb_flags;	/* misc. flags */
-	uint8_t	sb_shared_vn;	/* shared version number */
-	xfs_extlen_t	sb_inoalignmt;	/* inode chunk alignment, fsblocks */
-	uint32_t	sb_unit;	/* stripe or raid unit */
-	uint32_t	sb_width;	/* stripe or raid width */
-	uint8_t	sb_dirblklog;	/* log2 of dir block size (fsbs) */
-	uint8_t	sb_logsectlog;	/* log2 of the log sector size */
-	uint16_t	sb_logsectsize;	/* sector size for the log, bytes */
-	uint32_t	sb_logsunit;	/* stripe unit size for the log */
-	uint32_t	sb_features2;	/* additonal feature bits */
-} __attribute__ ((gcc_struct, __packed__));
-
-
 /*@
   @ requires \valid(disk_car);
   @ requires \valid(partition);
diff --git a/src/xfs_struct.h b/src/xfs_struct.h
new file mode 100644
index 00000000..dea602f7
--- /dev/null
+++ b/src/xfs_struct.h
@@ -0,0 +1,115 @@
+/*
+ * File xfs_struct.h
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.  Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 51
+ * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+/*
+ * Super block
+ * Fits into a sector-sized buffer at address 0 of each allocation group.
+ * Only the first of these is ever updated except during growfs.
+ */
+#ifndef _XFS_STRUCT_H
+#define _XFS_STRUCT_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define XFS_SUPERBLOCK_SIZE	512
+
+#define	XFS_SB_MAGIC		0x58465342	/* 'XFSB' */
+#define	XFS_SB_VERSION_1	1		/* 5.3, 6.0.1, 6.1 */
+#define	XFS_SB_VERSION_2	2		/* 6.2 - attributes */
+#define	XFS_SB_VERSION_3	3		/* 6.2 - new inode version */
+#define	XFS_SB_VERSION_4	4		/* 6.2+ - bitmask version */
+#define	XFS_SB_VERSION_5	5		/* CRC enabled filesystem */
+#define XFS_SB_VERSION_NUMBITS          0x000f
+
+typedef	uint32_t	xfs_extlen_t;	/* extent length in blocks */
+typedef uint64_t	xfs_drfsbno_t;	/* blockno in filesystem (raw) */
+typedef	uint64_t	xfs_drtbno_t;	/* extent (block) in realtime area */
+typedef uint64_t	xfs_ino_t;	/* <inode> type */
+typedef uint32_t	xfs_agblock_t;	/* blockno in alloc. group */
+typedef	uint32_t	xfs_agnumber_t;	/* allocation group number */
+typedef uint64_t        xfs_dfsbno_t;
+
+struct xfs_sb
+{
+	uint32_t	sb_magicnum;	/* magic number == XFS_SB_MAGIC */
+	uint32_t	sb_blocksize;	/* logical block size, bytes */
+	xfs_drfsbno_t	sb_dblocks;	/* number of data blocks */
+	xfs_drfsbno_t	sb_rblocks;	/* number of realtime blocks */
+	xfs_drtbno_t	sb_rextents;	/* number of realtime extents */
+	uint8_t		sb_uuid[16];	/* file system unique id */
+	xfs_dfsbno_t	sb_logstart;	/* starting block of log if internal */
+	xfs_ino_t	sb_rootino;	/* root inode number */
+	xfs_ino_t	sb_rbmino;	/* bitmap inode for realtime extents */
+	xfs_ino_t	sb_rsumino;	/* summary inode for rt bitmap */
+	xfs_agblock_t	sb_rextsize;	/* realtime extent size, blocks */
+	xfs_agblock_t	sb_agblocks;	/* size of an allocation group */
+	xfs_agnumber_t	sb_agcount;	/* number of allocation groups */
+	xfs_extlen_t	sb_rbmblocks;	/* number of rt bitmap blocks */
+	xfs_extlen_t	sb_logblocks;	/* number of log blocks */
+	uint16_t	sb_versionnum;	/* header version == XFS_SB_VERSION */
+	uint16_t	sb_sectsize;	/* volume sector size, bytes */
+	uint16_t	sb_inodesize;	/* inode size, bytes */
+	uint16_t	sb_inopblock;	/* inodes per block */
+	char		sb_fname[12];	/* file system name */
+	uint8_t	sb_blocklog;	/* log2 of sb_blocksize */
+	uint8_t	sb_sectlog;	/* log2 of sb_sectsize */
+	uint8_t	sb_inodelog;	/* log2 of sb_inodesize */
+	uint8_t	sb_inopblog;	/* log2 of sb_inopblock */
+	uint8_t	sb_agblklog;	/* log2 of sb_agblocks (rounded up) */
+	uint8_t	sb_rextslog;	/* log2 of sb_rextents */
+	uint8_t	sb_inprogress;	/* mkfs is in progress, don't mount */
+	uint8_t	sb_imax_pct;	/* max % of fs for inode space */
+					/* statistics */
+	/*
+	 * These fields must remain contiguous.  If you really
+	 * want to change their layout, make sure you fix the
+	 * code in xfs_trans_apply_sb_deltas().
+	 */
+	uint64_t	sb_icount;	/* allocated inodes */
+	uint64_t	sb_ifree;	/* free inodes */
+	uint64_t	sb_fdblocks;	/* free data blocks */
+	uint64_t	sb_frextents;	/* free realtime extents */
+	/*
+	 * End contiguous fields.
+	 */
+	xfs_ino_t	sb_uquotino;	/* user quota inode */
+	xfs_ino_t	sb_gquotino;	/* group quota inode */
+	uint16_t	sb_qflags;	/* quota flags */
+	uint8_t	sb_flags;	/* misc. flags */
+	uint8_t	sb_shared_vn;	/* shared version number */
+	xfs_extlen_t	sb_inoalignmt;	/* inode chunk alignment, fsblocks */
+	uint32_t	sb_unit;	/* stripe or raid unit */
+	uint32_t	sb_width;	/* stripe or raid width */
+	uint8_t	sb_dirblklog;	/* log2 of dir block size (fsbs) */
+	uint8_t	sb_logsectlog;	/* log2 of the log sector size */
+	uint16_t	sb_logsectsize;	/* sector size for the log, bytes */
+	uint32_t	sb_logsunit;	/* stripe unit size for the log */
+	uint32_t	sb_features2;	/* additonal feature bits */
+} __attribute__ ((gcc_struct, __packed__));
+
+#ifdef __cplusplus
+} /* closing brace for extern "C" */
+#endif
+#endif