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Diffstat (limited to 'fs/xfs/xfs_ioctl32.c')
-rw-r--r--fs/xfs/xfs_ioctl32.c58
1 files changed, 51 insertions, 7 deletions
diff --git a/fs/xfs/xfs_ioctl32.c b/fs/xfs/xfs_ioctl32.c
index fba115f4103a..5001dca361e9 100644
--- a/fs/xfs/xfs_ioctl32.c
+++ b/fs/xfs/xfs_ioctl32.c
@@ -241,6 +241,32 @@ xfs_compat_ioc_bulkstat(
int done;
int error;
+ /*
+ * Output structure handling functions. Depending on the command,
+ * either the xfs_bstat and xfs_inogrp structures are written out
+ * to userpace memory via bulkreq.ubuffer. Normally the compat
+ * functions and structure size are the correct ones to use ...
+ */
+ inumbers_fmt_pf inumbers_func = xfs_inumbers_fmt_compat;
+ bulkstat_one_pf bs_one_func = xfs_bulkstat_one_compat;
+ size_t bs_one_size = sizeof(struct compat_xfs_bstat);
+
+#ifdef CONFIG_X86_X32
+ if (in_x32_syscall()) {
+ /*
+ * ... but on x32 the input xfs_fsop_bulkreq has pointers
+ * which must be handled in the "compat" (32-bit) way, while
+ * the xfs_bstat and xfs_inogrp structures follow native 64-
+ * bit layout convention. So adjust accordingly, otherwise
+ * the data written out in compat layout will not match what
+ * x32 userspace expects.
+ */
+ inumbers_func = xfs_inumbers_fmt;
+ bs_one_func = xfs_bulkstat_one;
+ bs_one_size = sizeof(struct xfs_bstat);
+ }
+#endif
+
/* done = 1 if there are more stats to get and if bulkstat */
/* should be called again (unused here, but used in dmapi) */
@@ -272,15 +298,15 @@ xfs_compat_ioc_bulkstat(
if (cmd == XFS_IOC_FSINUMBERS_32) {
error = xfs_inumbers(mp, &inlast, &count,
- bulkreq.ubuffer, xfs_inumbers_fmt_compat);
+ bulkreq.ubuffer, inumbers_func);
} else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE_32) {
int res;
- error = xfs_bulkstat_one_compat(mp, inlast, bulkreq.ubuffer,
- sizeof(compat_xfs_bstat_t), NULL, &res);
+ error = bs_one_func(mp, inlast, bulkreq.ubuffer,
+ bs_one_size, NULL, &res);
} else if (cmd == XFS_IOC_FSBULKSTAT_32) {
error = xfs_bulkstat(mp, &inlast, &count,
- xfs_bulkstat_one_compat, sizeof(compat_xfs_bstat_t),
+ bs_one_func, bs_one_size,
bulkreq.ubuffer, &done);
} else
error = -EINVAL;
@@ -336,6 +362,7 @@ xfs_compat_attrlist_by_handle(
{
int error;
attrlist_cursor_kern_t *cursor;
+ compat_xfs_fsop_attrlist_handlereq_t __user *p = arg;
compat_xfs_fsop_attrlist_handlereq_t al_hreq;
struct dentry *dentry;
char *kbuf;
@@ -370,6 +397,11 @@ xfs_compat_attrlist_by_handle(
if (error)
goto out_kfree;
+ if (copy_to_user(&p->pos, cursor, sizeof(attrlist_cursor_kern_t))) {
+ error = -EFAULT;
+ goto out_kfree;
+ }
+
if (copy_to_user(compat_ptr(al_hreq.buffer), kbuf, al_hreq.buflen))
error = -EFAULT;
@@ -547,8 +579,12 @@ xfs_file_compat_ioctl(
case FS_IOC_GETFSMAP:
case XFS_IOC_SCRUB_METADATA:
return xfs_file_ioctl(filp, cmd, p);
-#ifndef BROKEN_X86_ALIGNMENT
- /* These are handled fine if no alignment issues */
+#if !defined(BROKEN_X86_ALIGNMENT) || defined(CONFIG_X86_X32)
+ /*
+ * These are handled fine if no alignment issues. To support x32
+ * which uses native 64-bit alignment we must emit these cases in
+ * addition to the ia-32 compat set below.
+ */
case XFS_IOC_ALLOCSP:
case XFS_IOC_FREESP:
case XFS_IOC_RESVSP:
@@ -561,8 +597,16 @@ xfs_file_compat_ioctl(
case XFS_IOC_FSGROWFSDATA:
case XFS_IOC_FSGROWFSRT:
case XFS_IOC_ZERO_RANGE:
+#ifdef CONFIG_X86_X32
+ /*
+ * x32 special: this gets a different cmd number from the ia-32 compat
+ * case below; the associated data will match native 64-bit alignment.
+ */
+ case XFS_IOC_SWAPEXT:
+#endif
return xfs_file_ioctl(filp, cmd, p);
-#else
+#endif
+#if defined(BROKEN_X86_ALIGNMENT)
case XFS_IOC_ALLOCSP_32:
case XFS_IOC_FREESP_32:
case XFS_IOC_ALLOCSP64_32: