diff options
Diffstat (limited to 'fs/ioctl.c')
| -rw-r--r-- | fs/ioctl.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/fs/ioctl.c b/fs/ioctl.c index e14bd85f3bc6..812061ba667a 100644 --- a/fs/ioctl.c +++ b/fs/ioctl.c @@ -491,6 +491,35 @@ int ioctl_preallocate(struct file *filp, void __user *argp) return vfs_fallocate(filp, FALLOC_FL_KEEP_SIZE, sr.l_start, sr.l_len); } +/* on ia32 l_start is on a 32-bit boundary */ +#if defined CONFIG_COMPAT && defined(CONFIG_X86_64) +/* just account for different alignment */ +int compat_ioctl_preallocate(struct file *file, + struct space_resv_32 __user *argp) +{ + struct inode *inode = file_inode(file); + struct space_resv_32 sr; + + if (copy_from_user(&sr, argp, sizeof(sr))) + return -EFAULT; + + switch (sr.l_whence) { + case SEEK_SET: + break; + case SEEK_CUR: + sr.l_start += file->f_pos; + break; + case SEEK_END: + sr.l_start += i_size_read(inode); + break; + default: + return -EINVAL; + } + + return vfs_fallocate(file, FALLOC_FL_KEEP_SIZE, sr.l_start, sr.l_len); +} +#endif + static int file_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { |