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authorsandeen@sandeen.net <sandeen@sandeen.net>2008-11-25 21:20:09 -0600
committerLachlan McIlroy <lachlan@redback.melbourne.sgi.com>2008-12-02 17:10:04 +1100
commite94fc4a43e5c39f689e83caf6d2f0939081f5e6b (patch)
tree8c076b71376488d7829f6c992d5e5ee545be9e19 /fs/xfs
parentd5547f9feea459dfc9e7313bd1d561394e2c129f (diff)
[XFS] Add compat handlers for swapext ioctl
The big hitter here was the bstat field, which contains different sized time_t on 32 vs. 64 bit. Add a copyin function to translate the 32-bit arg to 64-bit, and call the swapext ioctl helper. Signed-off-by: Eric Sandeen <sandeen@sandeen.net> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Diffstat (limited to 'fs/xfs')
-rw-r--r--fs/xfs/linux-2.6/xfs_ioctl32.c61
-rw-r--r--fs/xfs/linux-2.6/xfs_ioctl32.h13
2 files changed, 69 insertions, 5 deletions
diff --git a/fs/xfs/linux-2.6/xfs_ioctl32.c b/fs/xfs/linux-2.6/xfs_ioctl32.c
index 35edc054fb99..132f3dd2c7e8 100644
--- a/fs/xfs/linux-2.6/xfs_ioctl32.c
+++ b/fs/xfs/linux-2.6/xfs_ioctl32.c
@@ -108,6 +108,50 @@ xfs_inumbers_fmt_compat(
#define xfs_inumbers_fmt_compat xfs_inumbers_fmt
#endif
+STATIC int
+xfs_ioctl32_bstime_copyin(
+ xfs_bstime_t *bstime,
+ compat_xfs_bstime_t __user *bstime32)
+{
+ compat_time_t sec32; /* tv_sec differs on 64 vs. 32 */
+
+ if (get_user(sec32, &bstime32->tv_sec) ||
+ get_user(bstime->tv_nsec, &bstime32->tv_nsec))
+ return -XFS_ERROR(EFAULT);
+ bstime->tv_sec = sec32;
+ return 0;
+}
+
+/* xfs_bstat_t has differing alignment on intel, & bstime_t sizes everywhere */
+STATIC int
+xfs_ioctl32_bstat_copyin(
+ xfs_bstat_t *bstat,
+ compat_xfs_bstat_t __user *bstat32)
+{
+ if (get_user(bstat->bs_ino, &bstat32->bs_ino) ||
+ get_user(bstat->bs_mode, &bstat32->bs_mode) ||
+ get_user(bstat->bs_nlink, &bstat32->bs_nlink) ||
+ get_user(bstat->bs_uid, &bstat32->bs_uid) ||
+ get_user(bstat->bs_gid, &bstat32->bs_gid) ||
+ get_user(bstat->bs_rdev, &bstat32->bs_rdev) ||
+ get_user(bstat->bs_blksize, &bstat32->bs_blksize) ||
+ get_user(bstat->bs_size, &bstat32->bs_size) ||
+ xfs_ioctl32_bstime_copyin(&bstat->bs_atime, &bstat32->bs_atime) ||
+ xfs_ioctl32_bstime_copyin(&bstat->bs_mtime, &bstat32->bs_mtime) ||
+ xfs_ioctl32_bstime_copyin(&bstat->bs_ctime, &bstat32->bs_ctime) ||
+ get_user(bstat->bs_blocks, &bstat32->bs_size) ||
+ get_user(bstat->bs_xflags, &bstat32->bs_size) ||
+ get_user(bstat->bs_extsize, &bstat32->bs_extsize) ||
+ get_user(bstat->bs_extents, &bstat32->bs_extents) ||
+ get_user(bstat->bs_gen, &bstat32->bs_gen) ||
+ get_user(bstat->bs_projid, &bstat32->bs_projid) ||
+ get_user(bstat->bs_dmevmask, &bstat32->bs_dmevmask) ||
+ get_user(bstat->bs_dmstate, &bstat32->bs_dmstate) ||
+ get_user(bstat->bs_aextents, &bstat32->bs_aextents))
+ return -XFS_ERROR(EFAULT);
+ return 0;
+}
+
/* XFS_IOC_FSBULKSTAT and friends */
STATIC int
@@ -292,6 +336,18 @@ xfs_compat_ioctl(
case XFS_IOC_GETVERSION_32:
cmd = _NATIVE_IOC(cmd, long);
break;
+ case XFS_IOC_SWAPEXT: {
+ struct xfs_swapext sxp;
+ struct compat_xfs_swapext __user *sxu = arg;
+
+ /* Bulk copy in up to the sx_stat field, then grab bstat */
+ if (copy_from_user(&sxp, sxu,
+ offsetof(xfs_swapext_t, sx_stat)) ||
+ xfs_ioctl32_bstat_copyin(&sxp.sx_stat, &sxu->sx_stat))
+ return -XFS_ERROR(EFAULT);
+ error = xfs_swapext(&sxp);
+ return -error;
+ }
#ifdef BROKEN_X86_ALIGNMENT
/* xfs_flock_t has wrong u32 vs u64 alignment */
case XFS_IOC_ALLOCSP_32:
@@ -322,11 +378,6 @@ xfs_compat_ioctl(
case XFS_IOC_UNRESVSP64:
case XFS_IOC_FSGEOMETRY_V1:
break;
-
- /* xfs_bstat_t still has wrong u32 vs u64 alignment */
- case XFS_IOC_SWAPEXT:
- break;
-
#endif
case XFS_IOC_FSBULKSTAT_32:
case XFS_IOC_FSBULKSTAT_SINGLE_32:
diff --git a/fs/xfs/linux-2.6/xfs_ioctl32.h b/fs/xfs/linux-2.6/xfs_ioctl32.h
index 003a10e695be..bf08ab12a6f8 100644
--- a/fs/xfs/linux-2.6/xfs_ioctl32.h
+++ b/fs/xfs/linux-2.6/xfs_ioctl32.h
@@ -110,6 +110,19 @@ typedef struct compat_xfs_fsop_handlereq {
#define XFS_IOC_READLINK_BY_HANDLE_32 \
_IOWR('X', 108, struct compat_xfs_fsop_handlereq)
+/* The bstat field in the swapext struct needs translation */
+typedef struct compat_xfs_swapext {
+ __int64_t sx_version; /* version */
+ __int64_t sx_fdtarget; /* fd of target file */
+ __int64_t sx_fdtmp; /* fd of tmp file */
+ xfs_off_t sx_offset; /* offset into file */
+ xfs_off_t sx_length; /* leng from offset */
+ char sx_pad[16]; /* pad space, unused */
+ compat_xfs_bstat_t sx_stat; /* stat of target b4 copy */
+} __compat_packed compat_xfs_swapext_t;
+
+#define XFS_IOC_SWAPEXT_32 _IOWR('X', 109, struct compat_xfs_swapext)
+
#ifdef BROKEN_X86_ALIGNMENT
/* on ia32 l_start is on a 32-bit boundary */
typedef struct compat_xfs_flock64 {