1  /*
       2   * Copyright (c) 2021 Eugene Syromyatnikov <evgsyr@gmail.com>.
       3   * All rights reserved.
       4   *
       5   * SPDX-License-Identifier: LGPL-2.1-or-later
       6   */
       7  
       8  #include "defs.h"
       9  
      10  #include <linux/ioctl.h>
      11  #include <linux/counter.h>
      12  
      13  #include "xlat/counter_ioctl_component_types.h"
      14  #include "xlat/counter_ioctl_event_types.h"
      15  #include "xlat/counter_ioctl_scopes.h"
      16  
      17  
      18  static void
      19  print_struct_counter_component(const struct counter_component *const cc)
      20  {
      21  	tprint_struct_begin();
      22  	PRINT_FIELD_XVAL(*cc, type, counter_ioctl_component_types,
      23  			 "COUNTER_COMPONENT_???");
      24  	tprint_struct_next();
      25  	PRINT_FIELD_XVAL(*cc, scope, counter_ioctl_scopes,
      26  			 "COUNTER_SCOPE_???");
      27  	tprint_struct_next();
      28  	PRINT_FIELD_U(*cc, parent);
      29  	tprint_struct_next();
      30  	PRINT_FIELD_U(*cc, id);
      31  	tprint_struct_end();
      32  }
      33  
      34  static void
      35  print_struct_counter_watch(struct tcb *const tcp, const kernel_ulong_t addr)
      36  {
      37  	CHECK_IOCTL_SIZE(COUNTER_ADD_WATCH_IOCTL, 6);
      38  	CHECK_TYPE_SIZE(struct counter_watch, 6);
      39  	struct counter_watch w;
      40  
      41  	if (umove_or_printaddr(tcp, addr, &w))
      42  		return;
      43  
      44  	tprint_struct_begin();
      45  	PRINT_FIELD_OBJ_PTR(w, component, print_struct_counter_component);
      46  	tprint_struct_next();
      47  	PRINT_FIELD_XVAL(w, event, counter_ioctl_event_types,
      48  			 "COUNTER_EVENT_???");
      49  	tprint_struct_next();
      50  	PRINT_FIELD_U(w, channel);
      51  	tprint_struct_end();
      52  }
      53  
      54  int
      55  counter_ioctl(struct tcb *const tcp, const unsigned int code,
      56  	      const kernel_ulong_t arg)
      57  {
      58  	switch (code) {
      59  	case COUNTER_ADD_WATCH_IOCTL:
      60  		tprint_arg_next();
      61  		print_struct_counter_watch(tcp, arg);
      62  		return RVAL_IOCTL_DECODED;
      63  
      64  	case COUNTER_ENABLE_EVENTS_IOCTL:
      65  	case COUNTER_DISABLE_EVENTS_IOCTL:
      66  		return RVAL_IOCTL_DECODED;
      67  
      68  	default:
      69  		return RVAL_DECODED;
      70  	}
      71  }