1  /*
       2   * Copyright (c) 2014 Mike Frysinger <vapier@gentoo.org>
       3   * Copyright (c) 2015-2016 Dmitry V. Levin <ldv@strace.io>
       4   * Copyright (c) 2016-2021 The strace developers.
       5   * All rights reserved.
       6   *
       7   * SPDX-License-Identifier: LGPL-2.1-or-later
       8   */
       9  
      10  #include "defs.h"
      11  #include <linux/fs.h>
      12  
      13  static void
      14  decode_fstrim_range(struct tcb *const tcp, const kernel_ulong_t arg)
      15  {
      16  	struct fstrim_range range;
      17  
      18  	if (!umove_or_printaddr(tcp, arg, &range)) {
      19  		tprint_struct_begin();
      20  		PRINT_FIELD_X(range, start);
      21  		tprint_struct_next();
      22  		PRINT_FIELD_U(range, len);
      23  		tprint_struct_next();
      24  		PRINT_FIELD_U(range, minlen);
      25  		tprint_struct_end();
      26  	}
      27  }
      28  
      29  #include "xlat/fs_xflags.h"
      30  
      31  static void
      32  decode_fsxattr(struct tcb *const tcp, const kernel_ulong_t arg,
      33  	       const bool is_get)
      34  {
      35  	struct fsxattr fsxattr;
      36  
      37  	if (!umove_or_printaddr(tcp, arg, &fsxattr)) {
      38  		tprint_struct_begin();
      39  		PRINT_FIELD_FLAGS(fsxattr, fsx_xflags, fs_xflags, "FS_XFLAG_???");
      40  		tprint_struct_next();
      41  		PRINT_FIELD_U(fsxattr, fsx_extsize);
      42  		if (is_get) {
      43  			tprint_struct_next();
      44  			PRINT_FIELD_U(fsxattr, fsx_nextents);
      45  		}
      46  		tprint_struct_next();
      47  		PRINT_FIELD_X(fsxattr, fsx_projid);
      48  		tprint_struct_next();
      49  		PRINT_FIELD_U(fsxattr, fsx_cowextsize);
      50  		tprint_struct_end();
      51  	}
      52  }
      53  
      54  int
      55  fs_x_ioctl(struct tcb *const tcp, const unsigned int code,
      56  	   const kernel_ulong_t arg)
      57  {
      58  	switch (code) {
      59  	case FITRIM:
      60  		tprint_arg_next();
      61  		decode_fstrim_range(tcp, arg);
      62  		break;
      63  
      64  	case FS_IOC_FSGETXATTR:
      65  		if (entering(tcp))
      66  			return 0;
      67  		tprint_arg_next();
      68  		decode_fsxattr(tcp, arg, true);
      69  		break;
      70  
      71  	case FS_IOC_FSSETXATTR:
      72  		tprint_arg_next();
      73  		decode_fsxattr(tcp, arg, false);
      74  		break;
      75  
      76  	/* No arguments */
      77  	case FIFREEZE:
      78  	case FITHAW:
      79  		break;
      80  
      81  	default:
      82  		return RVAL_DECODED;
      83  	}
      84  
      85  	return RVAL_IOCTL_DECODED;
      86  }