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/*
* Copyright (c) 2012 The Chromium OS Authors.
* Copyright (c) 2012-2017 The strace developers.
* Written by Mike Frysinger <vapier@gentoo.org>.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "defs.h"
#include <linux/ioctl.h>
#include <linux/loop.h>
typedef struct loop_info struct_loop_info;
#include DEF_MPERS_TYPE(struct_loop_info)
#include MPERS_DEFS
#include "print_fields.h"
#include "xlat/loop_cmds.h"
#include "xlat/loop_flags_options.h"
#include "xlat/loop_crypt_type_options.h"
static void
decode_loop_info(struct tcb *const tcp, const kernel_ulong_t addr)
{
struct_loop_info info;
tprints(", ");
if (umove_or_printaddr(tcp, addr, &info))
return;
tprintf("{lo_number=%d", info.lo_number);
if (!abbrev(tcp)) {
PRINT_FIELD_DEV(", ", info, lo_device);
tprintf(", lo_inode=%" PRI_klu, (kernel_ulong_t) info.lo_inode);
PRINT_FIELD_DEV(", ", info, lo_rdevice);
}
tprintf(", lo_offset=%#x", info.lo_offset);
if (!abbrev(tcp) || info.lo_encrypt_type != LO_CRYPT_NONE) {
tprints(", lo_encrypt_type=");
printxval(loop_crypt_type_options, info.lo_encrypt_type,
"LO_CRYPT_???");
/*
* It is converted to unsigned before use in kernel, see
* loop_info64_from_old in drivers/block/loop.c
*/
tprintf(", lo_encrypt_key_size=%" PRIu32,
(uint32_t) info.lo_encrypt_key_size);
}
tprints(", lo_flags=");
printflags(loop_flags_options, info.lo_flags, "LO_FLAGS_???");
PRINT_FIELD_CSTRING(", ", info, lo_name);
if (!abbrev(tcp) || info.lo_encrypt_type != LO_CRYPT_NONE) {
const unsigned int lo_encrypt_key_size =
MIN((unsigned) info.lo_encrypt_key_size, LO_KEY_SIZE);
PRINT_FIELD_STRING(", ", info, lo_encrypt_key,
lo_encrypt_key_size, 0);
}
if (!abbrev(tcp))
tprintf(", lo_init=[%#" PRI_klx ", %#" PRI_klx "]"
", reserved=[%#hhx, %#hhx, %#hhx, %#hhx]}",
(kernel_ulong_t) info.lo_init[0],
(kernel_ulong_t) info.lo_init[1],
info.reserved[0], info.reserved[1],
info.reserved[2], info.reserved[3]);
else
tprints(", ...}");
}
static void
decode_loop_info64(struct tcb *const tcp, const kernel_ulong_t addr)
{
struct loop_info64 info64;
tprints(", ");
if (umove_or_printaddr(tcp, addr, &info64))
return;
if (!abbrev(tcp)) {
PRINT_FIELD_DEV("{", info64, lo_device);
tprintf(", lo_inode=%" PRIu64, (uint64_t) info64.lo_inode);
PRINT_FIELD_DEV(", ", info64, lo_rdevice);
tprintf(", lo_offset=%#" PRIx64 ", lo_sizelimit=%" PRIu64
", lo_number=%" PRIu32,
(uint64_t) info64.lo_offset,
(uint64_t) info64.lo_sizelimit,
(uint32_t) info64.lo_number);
} else {
tprintf("{lo_offset=%#" PRIx64 ", lo_number=%" PRIu32,
(uint64_t) info64.lo_offset,
(uint32_t) info64.lo_number);
}
if (!abbrev(tcp) || info64.lo_encrypt_type != LO_CRYPT_NONE) {
tprints(", lo_encrypt_type=");
printxval(loop_crypt_type_options, info64.lo_encrypt_type,
"LO_CRYPT_???");
tprintf(", lo_encrypt_key_size=%" PRIu32,
info64.lo_encrypt_key_size);
}
tprints(", lo_flags=");
printflags(loop_flags_options, info64.lo_flags, "LO_FLAGS_???");
PRINT_FIELD_CSTRING(", ", info64, lo_file_name);
if (!abbrev(tcp) || info64.lo_encrypt_type != LO_CRYPT_NONE) {
PRINT_FIELD_CSTRING(", ", info64, lo_crypt_name);
const unsigned int lo_encrypt_key_size =
MIN((unsigned) info64.lo_encrypt_key_size, LO_KEY_SIZE);
PRINT_FIELD_STRING(", ", info64, lo_encrypt_key,
lo_encrypt_key_size, 0);
}
if (!abbrev(tcp))
tprintf(", lo_init=[%#" PRIx64 ", %#" PRIx64 "]}",
(uint64_t) info64.lo_init[0],
(uint64_t) info64.lo_init[1]);
else
tprints(", ...}");
}
MPERS_PRINTER_DECL(int, loop_ioctl,
struct tcb *tcp, const unsigned int code,
const kernel_ulong_t arg)
{
switch (code) {
case LOOP_GET_STATUS:
if (entering(tcp))
return 0;
ATTRIBUTE_FALLTHROUGH;
case LOOP_SET_STATUS:
decode_loop_info(tcp, arg);
break;
case LOOP_GET_STATUS64:
if (entering(tcp))
return 0;
ATTRIBUTE_FALLTHROUGH;
case LOOP_SET_STATUS64:
decode_loop_info64(tcp, arg);
break;
case LOOP_CLR_FD:
case LOOP_SET_CAPACITY:
/* newer loop-control stuff */
case LOOP_CTL_GET_FREE:
/* Takes no arguments */
break;
case LOOP_SET_FD:
case LOOP_CHANGE_FD:
tprints(", ");
printfd(tcp, arg);
break;
/* newer loop-control stuff */
case LOOP_CTL_ADD:
case LOOP_CTL_REMOVE:
tprintf(", %d", (int) arg);
break;
case LOOP_SET_DIRECT_IO:
case LOOP_SET_BLOCK_SIZE:
tprintf(", %" PRI_klu, arg);
break;
default:
return RVAL_DECODED;
}
return RVAL_IOCTL_DECODED;
}
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