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authorLinus Torvalds <torvalds@linux-foundation.org>2009-03-27 16:23:12 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-03-27 16:23:12 -0700
commit3ae5080f4c2e293229508dabe7c8a90af4e4c460 (patch)
tree9cb11f26905a82b7fac9d3b8f9d61d58bc5c94b0 /fs/compat.c
parent2c9e15a011c55ff96b2b8d2b126d1b9a96abba20 (diff)
parentaabb8fdb41128705fd1627f56fdd571e45fdbcdb (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (37 commits) fs: avoid I_NEW inodes Merge code for single and multiple-instance mounts Remove get_init_pts_sb() Move common mknod_ptmx() calls into caller Parse mount options just once and copy them to super block Unroll essentials of do_remount_sb() into devpts vfs: simple_set_mnt() should return void fs: move bdev code out of buffer.c constify dentry_operations: rest constify dentry_operations: configfs constify dentry_operations: sysfs constify dentry_operations: JFS constify dentry_operations: OCFS2 constify dentry_operations: GFS2 constify dentry_operations: FAT constify dentry_operations: FUSE constify dentry_operations: procfs constify dentry_operations: ecryptfs constify dentry_operations: CIFS constify dentry_operations: AFS ...
Diffstat (limited to 'fs/compat.c')
-rw-r--r--fs/compat.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/fs/compat.c b/fs/compat.c
index 0949b43794a..5e374aad33f 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -378,6 +378,34 @@ out:
return error;
}
+/*
+ * This is a copy of sys_ustat, just dealing with a structure layout.
+ * Given how simple this syscall is that apporach is more maintainable
+ * than the various conversion hacks.
+ */
+asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u)
+{
+ struct super_block *sb;
+ struct compat_ustat tmp;
+ struct kstatfs sbuf;
+ int err;
+
+ sb = user_get_super(new_decode_dev(dev));
+ if (!sb)
+ return -EINVAL;
+ err = vfs_statfs(sb->s_root, &sbuf);
+ drop_super(sb);
+ if (err)
+ return err;
+
+ memset(&tmp, 0, sizeof(struct compat_ustat));
+ tmp.f_tfree = sbuf.f_bfree;
+ tmp.f_tinode = sbuf.f_ffree;
+ if (copy_to_user(u, &tmp, sizeof(struct compat_ustat)))
+ return -EFAULT;
+ return 0;
+}
+
static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
{
if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||