[XFS] Fix XFS_IOC_FSBULKSTAT{,_SINGLE} & XFS_IOC_FSINUMBERS in compat mode

* 32bit struct xfs_fsop_bulkreq has different size and layout of
members, no matter the alignment. Move the code out of the #else
branch (why was it there in the first place?). Define _32 variants of
the ioctl constants.
* 32bit struct xfs_bstat is different because of time_t and on
i386 because of different padding. Make xfs_bulkstat_one() accept a
custom "output formatter" in the private_data argument which takes care
of the xfs_bulkstat_one_compat() that takes care of the different
layout in the compat case.
* i386 struct xfs_inogrp has different padding.
Add a similar "output formatter" mecanism to xfs_inumbers().

SGI-PV: 967354
SGI-Modid: xfs-linux-melb:xfs-kern:29102a

Signed-off-by: Michal Marek <mmarek@suse.cz>
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>

1 files changed, 19 insertions, 1 deletions

diff --git a/fs/xfs/xfs_itable.h b/fs/xfs/xfs_itable.h
index f25a28862a17..a1f18fce9b70 100644
--- a/fs/xfs/xfs_itable.h
+++ b/fs/xfs/xfs_itable.h
@@ -69,6 +69,10 @@ xfs_bulkstat_single(
         char                    __user *buffer,
         int                     *done);
 
+typedef int (*bulkstat_one_fmt_pf)(  /* used size in bytes or negative error */
+        void                    __user *ubuffer, /* buffer to write to */
+        const xfs_bstat_t       *buffer);        /* buffer to read from */
+
 int
 xfs_bulkstat_one(
         xfs_mount_t             *mp,
@@ -86,11 +90,25 @@ xfs_internal_inum(
         xfs_mount_t             *mp,
         xfs_ino_t               ino);
 
+typedef int (*inumbers_fmt_pf)(
+        void                    __user *ubuffer, /* buffer to write to */
+        const xfs_inogrp_t      *buffer,        /* buffer to read from */
+        long                    count,          /* # of elements to read */
+        long                    *written);      /* # of bytes written */
+
+int
+xfs_inumbers_fmt(
+        void                    __user *ubuffer, /* buffer to write to */
+        const xfs_inogrp_t      *buffer,        /* buffer to read from */
+        long                    count,          /* # of elements to read */
+        long                    *written);      /* # of bytes written */
+
 int                                     /* error status */
 xfs_inumbers(
         xfs_mount_t             *mp,    /* mount point for filesystem */
         xfs_ino_t               *last,  /* last inode returned */
         int                     *count, /* size of buffer/count returned */
-        xfs_inogrp_t            __user *buffer);/* buffer with inode info */
+        void                    __user *buffer, /* buffer with inode info */
+        inumbers_fmt_pf         formatter);
 
 #endif  /* __XFS_ITABLE_H__ */