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strace/v4l2.c
Dmitry V. Levin 0b03de74bc build: prepare for -Wimplicit-fallthrough=5 
* gcc_compat.h (ATTRIBUTE_FALLTHROUGH): New macro.
* block.c (block_ioctl): Use it instead of "fall through" comment.
* btrfs.c (btrfs_ioctl): Likewise.
* loop.c (loop_ioctl): Likewise.
* mtd.c (mtd_ioctl): Likewise.
* rtc.c (rtc_ioctl): Likewise.
* v4l2.c (v4l2_ioctl): Likewise.
* dm.c (dm_decode_values): Likewise.
* process.c (SYS_FUNC(ptrace)): Likewise.
* quota.c (decode_cmd_data): Likewise.
* ucopy.c (umovestr): Likewise.
* unwind.c (unwind_print_stacktrace, unwind_capture_stacktrace)):
Likewise.
* term.c (term_ioctl): Add ATTRIBUTE_FALLTHROUGH.
* ioctl.c (ioctl_decode) [ALPHA || POWERPC]: Likewise.
* m4/st_warn_cflags.m4 (gl_WARN_ADD): Add -Wimplicit-fallthrough=5.
* tests/ioctl_v4l2.c (init_v4l2_format): Reorganize the switch statement
without implicit fallthrough.
2018-03-06 23:52:08 +00:00

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/*
* Copyright (c) 2014 Philippe De Muyter <phdm@macqel.be>
* Copyright (c) 2014 William Manley <will@williammanley.net>
* Copyright (c) 2011 Peter Zotov <whitequark@whitequark.org>
* Copyright (c) 2014-2018 The strace developers.
* All rights reserved.
*
* 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 <stdint.h>
#include <linux/ioctl.h>
#include <linux/types.h>
#include <linux/videodev2.h>
#include DEF_MPERS_TYPE(struct_v4l2_buffer)
#include DEF_MPERS_TYPE(struct_v4l2_clip)
#ifdef VIDIOC_CREATE_BUFS
# include DEF_MPERS_TYPE(struct_v4l2_create_buffers)
#endif
#include DEF_MPERS_TYPE(struct_v4l2_ext_control)
#include DEF_MPERS_TYPE(struct_v4l2_ext_controls)
#include DEF_MPERS_TYPE(struct_v4l2_format)
#include DEF_MPERS_TYPE(struct_v4l2_framebuffer)
#include DEF_MPERS_TYPE(struct_v4l2_input)
#include DEF_MPERS_TYPE(struct_v4l2_standard)
typedef struct v4l2_buffer struct_v4l2_buffer;
typedef struct v4l2_clip struct_v4l2_clip;
#ifdef VIDIOC_CREATE_BUFS
typedef struct v4l2_create_buffers struct_v4l2_create_buffers;
#endif
typedef struct v4l2_ext_control struct_v4l2_ext_control;
typedef struct v4l2_ext_controls struct_v4l2_ext_controls;
typedef struct v4l2_format struct_v4l2_format;
typedef struct v4l2_framebuffer struct_v4l2_framebuffer;
typedef struct v4l2_input struct_v4l2_input;
typedef struct v4l2_standard struct_v4l2_standard;
#include MPERS_DEFS
#include "print_fields.h"
#include "xstring.h"
/* some historical constants */
#ifndef V4L2_CID_HCENTER
#define V4L2_CID_HCENTER (V4L2_CID_BASE+22)
#endif
#ifndef V4L2_CID_VCENTER
#define V4L2_CID_VCENTER (V4L2_CID_BASE+23)
#endif
#ifndef V4L2_CID_BAND_STOP_FILTER
#define V4L2_CID_BAND_STOP_FILTER (V4L2_CID_BASE+33)
#endif
/* v4l2_fourcc_be was added by Linux commit v3.18-rc1~101^2^2~127 */
#ifndef v4l2_fourcc_be
# define v4l2_fourcc_be(a, b, c, d) (v4l2_fourcc(a, b, c, d) | (1 << 31))
#endif
#define FMT_FRACT "%u/%u"
#define ARGS_FRACT(x) ((x).numerator), ((x).denominator)
#define FMT_RECT "{left=%d, top=%d, width=%u, height=%u}"
#define ARGS_RECT(x) (x).left, (x).top, (x).width, (x).height
#include "xlat/v4l2_pix_fmts.h"
#include "xlat/v4l2_sdr_fmts.h"
static void
print_pixelformat(uint32_t fourcc, const struct xlat *xlat)
{
unsigned char a[] = {
(unsigned char) fourcc,
(unsigned char) (fourcc >> 8),
(unsigned char) (fourcc >> 16),
(unsigned char) (fourcc >> 24),
};
unsigned int i;
tprints("v4l2_fourcc(");
for (i = 0; i < ARRAY_SIZE(a); ++i) {
unsigned char c = a[i];
if (i)
tprints(", ");
if (c == '\'' || c == '\\') {
char sym[] = {
'\'',
'\\',
c,
'\'',
'\0'
};
tprints(sym);
} else if (c >= ' ' && c <= 0x7e) {
char sym[] = {
'\'',
c,
'\'',
'\0'
};
tprints(sym);
} else {
char hex[] = {
'\'',
'\\',
'x',
"0123456789abcdef"[c >> 4],
"0123456789abcdef"[c & 0xf],
'\'',
'\0'
};
tprints(hex);
}
}
tprints(")");
if (xlat) {
const char *pixfmt_name = xlookup(xlat, fourcc);
if (pixfmt_name)
tprints_comment(pixfmt_name);
}
}
#include "xlat/v4l2_device_capabilities_flags.h"
static int
print_v4l2_capability(struct tcb *const tcp, const kernel_ulong_t arg)
{
struct v4l2_capability caps;
if (entering(tcp))
return 0;
tprints(", ");
if (umove_or_printaddr(tcp, arg, &caps))
return RVAL_IOCTL_DECODED;
PRINT_FIELD_CSTRING("{", caps, driver);
PRINT_FIELD_CSTRING(", ", caps, card);
PRINT_FIELD_CSTRING(", ", caps, bus_info);
tprintf(", version=%u.%u.%u, capabilities=",
(caps.version >> 16) & 0xFF,
(caps.version >> 8) & 0xFF,
caps.version & 0xFF);
printflags(v4l2_device_capabilities_flags, caps.capabilities,
"V4L2_CAP_???");
#ifdef V4L2_CAP_DEVICE_CAPS
tprints(", device_caps=");
printflags(v4l2_device_capabilities_flags, caps.device_caps,
"V4L2_CAP_???");
#endif
tprints("}");
return RVAL_IOCTL_DECODED;
}
#include "xlat/v4l2_buf_types.h"
#include "xlat/v4l2_format_description_flags.h"
static int
print_v4l2_fmtdesc(struct tcb *const tcp, const kernel_ulong_t arg)
{
struct v4l2_fmtdesc f;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &f))
return RVAL_IOCTL_DECODED;
tprintf("{index=%u, type=", f.index);
printxval(v4l2_buf_types, f.type, "V4L2_BUF_TYPE_???");
return 0;
}
if (!syserror(tcp) && !umove(tcp, arg, &f)) {
tprints(", flags=");
printflags(v4l2_format_description_flags, f.flags,
"V4L2_FMT_FLAG_???");
PRINT_FIELD_CSTRING(", ", f, description);
tprints(", pixelformat=");
print_pixelformat(f.pixelformat, v4l2_pix_fmts);
}
tprints("}");
return RVAL_IOCTL_DECODED;
}
#include "xlat/v4l2_fields.h"
#include "xlat/v4l2_colorspaces.h"
#include "xlat/v4l2_vbi_flags.h"
#include "xlat/v4l2_sliced_flags.h"
static bool
print_v4l2_clip(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
{
const struct_v4l2_clip *p = elem_buf;
tprintf(FMT_RECT, ARGS_RECT(p->c));
return true;
}
static bool
print_v4l2_format_fmt(struct tcb *const tcp, const char *prefix,
const struct_v4l2_format *f)
{
bool ret = true;
switch (f->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
tprints(prefix);
tprintf("fmt.pix={width=%u, height=%u, pixelformat=",
f->fmt.pix.width, f->fmt.pix.height);
print_pixelformat(f->fmt.pix.pixelformat, v4l2_pix_fmts);
tprints(", field=");
printxval(v4l2_fields, f->fmt.pix.field, "V4L2_FIELD_???");
tprintf(", bytesperline=%u, sizeimage=%u, colorspace=",
f->fmt.pix.bytesperline, f->fmt.pix.sizeimage);
printxval(v4l2_colorspaces, f->fmt.pix.colorspace,
"V4L2_COLORSPACE_???");
tprints("}");
break;
#if HAVE_DECL_V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE
case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: {
unsigned int i, max;
tprints(prefix);
tprintf("fmt.pix_mp={width=%u, height=%u, pixelformat=",
f->fmt.pix_mp.width, f->fmt.pix_mp.height);
print_pixelformat(f->fmt.pix_mp.pixelformat, v4l2_pix_fmts);
tprints(", field=");
printxval(v4l2_fields, f->fmt.pix_mp.field, "V4L2_FIELD_???");
tprints(", colorspace=");
printxval(v4l2_colorspaces, f->fmt.pix_mp.colorspace,
"V4L2_COLORSPACE_???");
tprints(", plane_fmt=[");
max = f->fmt.pix_mp.num_planes;
if (max > VIDEO_MAX_PLANES)
max = VIDEO_MAX_PLANES;
for (i = 0; i < max; i++) {
if (i > 0)
tprints(", ");
tprintf("{sizeimage=%u, bytesperline=%u}",
f->fmt.pix_mp.plane_fmt[i].sizeimage,
f->fmt.pix_mp.plane_fmt[i].bytesperline);
}
tprintf("], num_planes=%u}",
(unsigned) f->fmt.pix_mp.num_planes);
break;
}
#endif
/* OUTPUT_OVERLAY since Linux v2.6.22-rc1~1118^2~179 */
#if HAVE_DECL_V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY
case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
#endif
case V4L2_BUF_TYPE_VIDEO_OVERLAY: {
struct_v4l2_clip clip;
tprints(prefix);
tprintf("fmt.win={left=%d, top=%d, width=%u, height=%u, field=",
ARGS_RECT(f->fmt.win.w));
printxval(v4l2_fields, f->fmt.win.field, "V4L2_FIELD_???");
tprintf(", chromakey=%#x, clips=", f->fmt.win.chromakey);
ret = print_array(tcp, ptr_to_kulong(f->fmt.win.clips),
f->fmt.win.clipcount, &clip, sizeof(clip),
umoven_or_printaddr, print_v4l2_clip, 0);
tprintf(", clipcount=%u, bitmap=", f->fmt.win.clipcount);
printaddr(ptr_to_kulong(f->fmt.win.bitmap));
#ifdef HAVE_STRUCT_V4L2_WINDOW_GLOBAL_ALPHA
tprintf(", global_alpha=%#x", f->fmt.win.global_alpha);
#endif
tprints("}");
break;
}
case V4L2_BUF_TYPE_VBI_CAPTURE:
case V4L2_BUF_TYPE_VBI_OUTPUT:
tprints(prefix);
tprintf("fmt.vbi={sampling_rate=%u, offset=%u, "
"samples_per_line=%u, sample_format=",
f->fmt.vbi.sampling_rate, f->fmt.vbi.offset,
f->fmt.vbi.samples_per_line);
print_pixelformat(f->fmt.vbi.sample_format, v4l2_pix_fmts);
tprintf(", start=[%u, %u], count=[%u, %u], ",
f->fmt.vbi.start[0], f->fmt.vbi.start[1],
f->fmt.vbi.count[0], f->fmt.vbi.count[1]);
tprints("flags=");
printxval(v4l2_vbi_flags, f->fmt.vbi.flags, "V4L2_VBI_???");
tprints("}");
break;
/* both since Linux v2.6.14-rc2~64 */
#if HAVE_DECL_V4L2_BUF_TYPE_SLICED_VBI_CAPTURE
case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: {
unsigned int i, j;
tprints(prefix);
tprints("fmt.sliced={service_set=");
printxval(v4l2_sliced_flags, f->fmt.sliced.service_set,
"V4L2_SLICED_???");
tprintf(", io_size=%u, service_lines=[",
f->fmt.sliced.io_size);
for (i = 0; i < ARRAY_SIZE(f->fmt.sliced.service_lines); i++) {
if (i > 0)
tprints(", ");
tprints("[");
for (j = 0;
j < ARRAY_SIZE(f->fmt.sliced.service_lines[0]);
j++) {
if (j > 0)
tprints(", ");
tprintf("%#x",
f->fmt.sliced.service_lines[i][j]);
}
tprints("]");
}
tprints("]}");
break;
}
#endif
/* since Linux v4.4-rc1~118^2~14 */
#if HAVE_DECL_V4L2_BUF_TYPE_SDR_OUTPUT
case V4L2_BUF_TYPE_SDR_OUTPUT:
#endif
/* since Linux v3.15-rc1~85^2~213 */
#if HAVE_DECL_V4L2_BUF_TYPE_SDR_CAPTURE
case V4L2_BUF_TYPE_SDR_CAPTURE:
tprints(prefix);
tprints("fmt.sdr={pixelformat=");
print_pixelformat(f->fmt.sdr.pixelformat, v4l2_sdr_fmts);
#ifdef HAVE_STRUCT_V4L2_SDR_FORMAT_BUFFERSIZE
tprintf(", buffersize=%u",
f->fmt.sdr.buffersize);
#endif
tprints("}");
break;
#endif
}
return ret;
}
static int
print_v4l2_format(struct tcb *const tcp, const kernel_ulong_t arg,
const bool is_get)
{
struct_v4l2_format f;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &f))
return RVAL_IOCTL_DECODED;
tprints("{type=");
printxval(v4l2_buf_types, f.type, "V4L2_BUF_TYPE_???");
if (is_get)
return 0;
if (!print_v4l2_format_fmt(tcp, ", ", &f)) {
tprints("}");
return RVAL_IOCTL_DECODED;
}
return 0;
}
if (!syserror(tcp) && !umove(tcp, arg, &f))
print_v4l2_format_fmt(tcp, is_get ? ", " : " => ", &f);
tprints("}");
return RVAL_IOCTL_DECODED;
}
#include "xlat/v4l2_memories.h"
static int
print_v4l2_requestbuffers(struct tcb *const tcp, const kernel_ulong_t arg)
{
struct v4l2_requestbuffers reqbufs;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &reqbufs))
return RVAL_IOCTL_DECODED;
tprintf("{type=");
printxval(v4l2_buf_types, reqbufs.type, "V4L2_BUF_TYPE_???");
tprints(", memory=");
printxval(v4l2_memories, reqbufs.memory, "V4L2_MEMORY_???");
tprintf(", count=%u", reqbufs.count);
return 0;
}
if (!syserror(tcp)) {
tprints(" => ");
if (!umove(tcp, arg, &reqbufs))
tprintf("%u", reqbufs.count);
else
tprints("???");
}
tprints("}");
return RVAL_IOCTL_DECODED;
}
#include "xlat/v4l2_buf_flags.h"
static int
print_v4l2_buffer(struct tcb *const tcp, const unsigned int code,
const kernel_ulong_t arg)
{
struct_v4l2_buffer b;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &b))
return RVAL_IOCTL_DECODED;
tprints("{type=");
printxval(v4l2_buf_types, b.type, "V4L2_BUF_TYPE_???");
if (code != VIDIOC_DQBUF)
tprintf(", index=%u", b.index);
return 0;
}
if (!syserror(tcp) && !umove(tcp, arg, &b)) {
if (code == VIDIOC_DQBUF)
tprintf(", index=%u", b.index);
tprints(", memory=");
printxval(v4l2_memories, b.memory, "V4L2_MEMORY_???");
if (b.memory == V4L2_MEMORY_MMAP) {
tprintf(", m.offset=%#x", b.m.offset);
} else if (b.memory == V4L2_MEMORY_USERPTR) {
tprints(", m.userptr=");
printaddr(b.m.userptr);
}
tprintf(", length=%u, bytesused=%u, flags=",
b.length, b.bytesused);
printflags(v4l2_buf_flags, b.flags, "V4L2_BUF_FLAG_???");
if (code == VIDIOC_DQBUF) {
tprints(", timestamp = ");
MPERS_FUNC_NAME(print_struct_timeval)(&b.timestamp);
}
tprints(", ...");
}
tprints("}");
return RVAL_IOCTL_DECODED;
}
static int
print_v4l2_framebuffer(struct tcb *const tcp, const kernel_ulong_t arg)
{
struct_v4l2_framebuffer b;
tprints(", ");
if (!umove_or_printaddr(tcp, arg, &b)) {
tprintf("{capability=%#x, flags=%#x, base=",
b.capability, b.flags);
printaddr(ptr_to_kulong(b.base));
tprints("}");
}
return RVAL_IOCTL_DECODED;
}
static int
print_v4l2_buf_type(struct tcb *const tcp, const kernel_ulong_t arg)
{
int type;
tprints(", ");
if (!umove_or_printaddr(tcp, arg, &type)) {
tprints("[");
printxval(v4l2_buf_types, type, "V4L2_BUF_TYPE_???");
tprints("]");
}
return RVAL_IOCTL_DECODED;
}
#include "xlat/v4l2_streaming_capabilities.h"
#include "xlat/v4l2_capture_modes.h"
static int
print_v4l2_streamparm(struct tcb *const tcp, const kernel_ulong_t arg,
const bool is_get)
{
struct v4l2_streamparm s;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &s))
return RVAL_IOCTL_DECODED;
tprints("{type=");
printxval(v4l2_buf_types, s.type, "V4L2_BUF_TYPE_???");
switch (s.type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
if (is_get)
return 0;
tprints(", ");
break;
default:
tprints("}");
return RVAL_IOCTL_DECODED;
}
} else {
if (syserror(tcp) || umove(tcp, arg, &s) < 0) {
tprints("}");
return RVAL_IOCTL_DECODED;
}
tprints(is_get ? ", " : " => ");
}
if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
tprints("parm.capture={capability=");
printflags(v4l2_streaming_capabilities,
s.parm.capture.capability, "V4L2_CAP_???");
tprints(", capturemode=");
printflags(v4l2_capture_modes,
s.parm.capture.capturemode, "V4L2_MODE_???");
tprintf(", timeperframe=" FMT_FRACT,
ARGS_FRACT(s.parm.capture.timeperframe));
tprintf(", extendedmode=%u, readbuffers=%u}",
s.parm.capture.extendedmode,
s.parm.capture.readbuffers);
} else {
tprints("parm.output={capability=");
printflags(v4l2_streaming_capabilities,
s.parm.output.capability, "V4L2_CAP_???");
tprintf(", outputmode=%u", s.parm.output.outputmode);
tprintf(", timeperframe=" FMT_FRACT,
ARGS_FRACT(s.parm.output.timeperframe));
tprintf(", extendedmode=%u, writebuffers=%u}",
s.parm.output.extendedmode,
s.parm.output.writebuffers);
}
if (entering(tcp)) {
return 0;
} else {
tprints("}");
return RVAL_IOCTL_DECODED;
}
}
static int
print_v4l2_standard(struct tcb *const tcp, const kernel_ulong_t arg)
{
struct_v4l2_standard s;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &s))
return RVAL_IOCTL_DECODED;
tprintf("{index=%u", s.index);
return 0;
}
if (!syserror(tcp) && !umove(tcp, arg, &s)) {
PRINT_FIELD_CSTRING(", ", s, name);
tprintf(", frameperiod=" FMT_FRACT,
ARGS_FRACT(s.frameperiod));
tprintf(", framelines=%d", s.framelines);
}
tprints("}");
return RVAL_IOCTL_DECODED;
}
#include "xlat/v4l2_input_types.h"
static int
print_v4l2_input(struct tcb *const tcp, const kernel_ulong_t arg)
{
struct_v4l2_input i;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &i))
return RVAL_IOCTL_DECODED;
tprintf("{index=%u", i.index);
return 0;
}
if (!syserror(tcp) && !umove(tcp, arg, &i)) {
PRINT_FIELD_CSTRING(", ", i, name);
tprints(", type=");
printxval(v4l2_input_types, i.type, "V4L2_INPUT_TYPE_???");
}
tprints("}");
return RVAL_IOCTL_DECODED;
}
#include "xlat/v4l2_control_ids.h"
static int
print_v4l2_control(struct tcb *const tcp, const kernel_ulong_t arg,
const bool is_get)
{
struct v4l2_control c;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &c))
return RVAL_IOCTL_DECODED;
tprints("{id=");
printxval(v4l2_control_ids, c.id, "V4L2_CID_???");
if (!is_get)
tprintf(", value=%d", c.value);
return 0;
}
if (!syserror(tcp) && !umove(tcp, arg, &c)) {
tprints(is_get ? ", " : " => ");
tprintf("value=%d", c.value);
}
tprints("}");
return RVAL_IOCTL_DECODED;
}
#include "xlat/v4l2_tuner_types.h"
#include "xlat/v4l2_tuner_capabilities.h"
#include "xlat/v4l2_tuner_rxsubchanses.h"
#include "xlat/v4l2_tuner_audmodes.h"
static int
print_v4l2_tuner(struct tcb *const tcp, const kernel_ulong_t arg,
const bool is_get)
{
struct v4l2_tuner c;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &c))
return RVAL_IOCTL_DECODED;
tprintf("{index=%u", c.index);
if (is_get)
return 0;
tprints(", ");
} else {
if (syserror(tcp) || umove(tcp, arg, &c) < 0) {
tprints("}");
return RVAL_IOCTL_DECODED;
}
tprints(is_get ? ", " : " => ");
}
PRINT_FIELD_CSTRING("", c, name);
tprints(", type=");
printxval(v4l2_tuner_types, c.type, "V4L2_TUNER_TYPE_???");
tprints(", capability=");
printxval(v4l2_tuner_capabilities, c.capability,
"V4L2_TUNER_CAP_???");
tprintf(", rangelow=%u, rangehigh=%u, rxsubchans=",
c.rangelow, c.rangehigh);
printxval(v4l2_tuner_rxsubchanses, c.rxsubchans,
"V4L2_TUNER_SUB_???");
tprints(", audmode=");
printxval(v4l2_tuner_audmodes, c.audmode,
"V4L2_TUNER_MODE_???");
tprintf(", signal=%d, afc=%d", c.signal, c.afc);
if (entering(tcp)) {
return 0;
} else {
tprints("}");
return RVAL_IOCTL_DECODED;
}
}
#include "xlat/v4l2_control_types.h"
#include "xlat/v4l2_control_flags.h"
static int
print_v4l2_queryctrl(struct tcb *const tcp, const kernel_ulong_t arg)
{
struct v4l2_queryctrl c;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &c))
return RVAL_IOCTL_DECODED;
tprints("{id=");
} else {
if (syserror(tcp) || umove(tcp, arg, &c) < 0) {
tprints("}");
return RVAL_IOCTL_DECODED;
}
if (get_tcb_priv_ulong(tcp))
tprints(" => ");
}
if (entering(tcp) || get_tcb_priv_ulong(tcp)) {
#ifdef V4L2_CTRL_FLAG_NEXT_CTRL
const unsigned long next = c.id & V4L2_CTRL_FLAG_NEXT_CTRL;
set_tcb_priv_ulong(tcp, next);
if (next) {
tprints("V4L2_CTRL_FLAG_NEXT_CTRL|");
c.id &= ~V4L2_CTRL_FLAG_NEXT_CTRL;
}
#endif
printxval(v4l2_control_ids, c.id, "V4L2_CID_???");
}
if (exiting(tcp)) {
tprints(", type=");
printxval(v4l2_control_types, c.type, "V4L2_CTRL_TYPE_???");
PRINT_FIELD_CSTRING(", ", c, name);
tprintf(", minimum=%d, maximum=%d, step=%d"
", default_value=%d, flags=",
c.minimum, c.maximum, c.step, c.default_value);
printflags(v4l2_control_flags, c.flags, "V4L2_CTRL_FLAG_???");
tprints("}");
}
return entering(tcp) ? 0 : RVAL_IOCTL_DECODED;
}
static int
print_v4l2_cropcap(struct tcb *const tcp, const kernel_ulong_t arg)
{
struct v4l2_cropcap c;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &c))
return RVAL_IOCTL_DECODED;
tprints("{type=");
printxval(v4l2_buf_types, c.type, "V4L2_BUF_TYPE_???");
return 0;
}
if (!syserror(tcp) && !umove(tcp, arg, &c)) {
tprintf(", bounds=" FMT_RECT
", defrect=" FMT_RECT
", pixelaspect=" FMT_FRACT,
ARGS_RECT(c.bounds),
ARGS_RECT(c.defrect),
ARGS_FRACT(c.pixelaspect));
}
tprints("}");
return RVAL_IOCTL_DECODED;
}
static int
print_v4l2_crop(struct tcb *const tcp, const kernel_ulong_t arg,
const bool is_get)
{
struct v4l2_crop c;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &c))
return RVAL_IOCTL_DECODED;
tprints("{type=");
printxval(v4l2_buf_types, c.type, "V4L2_BUF_TYPE_???");
if (is_get)
return 0;
tprintf(", c=" FMT_RECT, ARGS_RECT(c.c));
} else {
if (!syserror(tcp) && !umove(tcp, arg, &c))
tprintf(", c=" FMT_RECT, ARGS_RECT(c.c));
}
tprints("}");
return RVAL_IOCTL_DECODED;
}
#ifdef VIDIOC_S_EXT_CTRLS
static bool
print_v4l2_ext_control(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
{
const struct_v4l2_ext_control *p = elem_buf;
tprints("{id=");
printxval(v4l2_control_ids, p->id, "V4L2_CID_???");
# if HAVE_DECL_V4L2_CTRL_TYPE_STRING
tprintf(", size=%u", p->size);
if (p->size > 0) {
tprints(", string=");
printstrn(tcp, ptr_to_kulong(p->string), p->size);
} else
# endif
tprintf(", value=%d, value64=%" PRId64, p->value, (int64_t) p->value64);
tprints("}");
return true;
}
#include "xlat/v4l2_control_classes.h"
static int
print_v4l2_ext_controls(struct tcb *const tcp, const kernel_ulong_t arg,
const bool is_get)
{
struct_v4l2_ext_controls c;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &c))
return RVAL_IOCTL_DECODED;
tprints("{ctrl_class=");
printxval(v4l2_control_classes, c.ctrl_class,
"V4L2_CTRL_CLASS_???");
tprintf(", count=%u", c.count);
if (!c.count) {
tprints("}");
return RVAL_IOCTL_DECODED;
}
if (is_get)
return 0;
tprints(", ");
} else {
if (umove(tcp, arg, &c) < 0) {
tprints("}");
return RVAL_IOCTL_DECODED;
}
tprints(is_get ? ", " : " => ");
}
tprints("controls=");
struct_v4l2_ext_control ctrl;
bool fail = !print_array(tcp, ptr_to_kulong(c.controls), c.count,
&ctrl, sizeof(ctrl),
umoven_or_printaddr_ignore_syserror,
print_v4l2_ext_control, 0);
if (exiting(tcp) && syserror(tcp))
tprintf(", error_idx=%u", c.error_idx);
if (exiting(tcp) || fail) {
tprints("}");
return RVAL_IOCTL_DECODED;
}
/* entering */
return 0;
}
#endif /* VIDIOC_S_EXT_CTRLS */
#ifdef VIDIOC_ENUM_FRAMESIZES
# include "xlat/v4l2_framesize_types.h"
static int
print_v4l2_frmsizeenum(struct tcb *const tcp, const kernel_ulong_t arg)
{
struct v4l2_frmsizeenum s;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &s))
return RVAL_IOCTL_DECODED;
tprintf("{index=%u, pixel_format=", s.index);
print_pixelformat(s.pixel_format, v4l2_pix_fmts);
return 0;
}
if (!syserror(tcp) && !umove(tcp, arg, &s)) {
tprints(", type=");
printxval(v4l2_framesize_types, s.type, "V4L2_FRMSIZE_TYPE_???");
switch (s.type) {
case V4L2_FRMSIZE_TYPE_DISCRETE:
tprintf(", discrete={width=%u, height=%u}",
s.discrete.width, s.discrete.height);
break;
case V4L2_FRMSIZE_TYPE_STEPWISE:
tprintf(", stepwise={min_width=%u, max_width=%u, "
"step_width=%u, min_height=%u, max_height=%u, "
"step_height=%u}",
s.stepwise.min_width, s.stepwise.max_width,
s.stepwise.step_width, s.stepwise.min_height,
s.stepwise.max_height, s.stepwise.step_height);
break;
}
}
tprints("}");
return RVAL_IOCTL_DECODED;
}
#endif /* VIDIOC_ENUM_FRAMESIZES */
#ifdef VIDIOC_ENUM_FRAMEINTERVALS
# include "xlat/v4l2_frameinterval_types.h"
static int
print_v4l2_frmivalenum(struct tcb *const tcp, const kernel_ulong_t arg)
{
struct v4l2_frmivalenum f;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &f))
return RVAL_IOCTL_DECODED;
tprintf("{index=%u, pixel_format=", f.index);
print_pixelformat(f.pixel_format, v4l2_pix_fmts);
tprintf(", width=%u, height=%u", f.width, f.height);
return 0;
}
if (!syserror(tcp) && !umove(tcp, arg, &f)) {
tprints(", type=");
printxval(v4l2_frameinterval_types, f.type,
"V4L2_FRMIVAL_TYPE_???");
switch (f.type) {
case V4L2_FRMIVAL_TYPE_DISCRETE:
tprintf(", discrete=" FMT_FRACT,
ARGS_FRACT(f.discrete));
break;
case V4L2_FRMIVAL_TYPE_STEPWISE:
case V4L2_FRMSIZE_TYPE_CONTINUOUS:
tprintf(", stepwise={min=" FMT_FRACT ", max="
FMT_FRACT ", step=" FMT_FRACT "}",
ARGS_FRACT(f.stepwise.min),
ARGS_FRACT(f.stepwise.max),
ARGS_FRACT(f.stepwise.step));
break;
}
}
tprints("}");
return RVAL_IOCTL_DECODED;
}
#endif /* VIDIOC_ENUM_FRAMEINTERVALS */
#ifdef VIDIOC_CREATE_BUFS
static int
print_v4l2_create_buffers(struct tcb *const tcp, const kernel_ulong_t arg)
{
static const char fmt[] = "{index=%u, count=%u}";
static char outstr[sizeof(fmt) + sizeof(int) * 6];
struct_v4l2_create_buffers b;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &b))
return RVAL_IOCTL_DECODED;
tprintf("{count=%u, memory=", b.count);
printxval(v4l2_memories, b.memory, "V4L2_MEMORY_???");
tprints(", format={type=");
printxval(v4l2_buf_types, b.format.type,
"V4L2_BUF_TYPE_???");
print_v4l2_format_fmt(tcp, ", ",
(struct_v4l2_format *) &b.format);
tprints("}}");
return 0;
}
if (syserror(tcp) || umove(tcp, arg, &b))
return RVAL_IOCTL_DECODED;
xsprintf(outstr, fmt, b.index, b.count);
tcp->auxstr = outstr;
return RVAL_IOCTL_DECODED | RVAL_STR;
}
#endif /* VIDIOC_CREATE_BUFS */
MPERS_PRINTER_DECL(int, v4l2_ioctl, struct tcb *const tcp,
const unsigned int code, const kernel_ulong_t arg)
{
if (!verbose(tcp))
return RVAL_DECODED;
switch (code) {
case VIDIOC_QUERYCAP: /* R */
return print_v4l2_capability(tcp, arg);
case VIDIOC_ENUM_FMT: /* RW */
return print_v4l2_fmtdesc(tcp, arg);
case VIDIOC_G_FMT: /* RW */
case VIDIOC_S_FMT: /* RW */
case VIDIOC_TRY_FMT: /* RW */
return print_v4l2_format(tcp, arg, code == VIDIOC_G_FMT);
case VIDIOC_REQBUFS: /* RW */
return print_v4l2_requestbuffers(tcp, arg);
case VIDIOC_QUERYBUF: /* RW */
case VIDIOC_QBUF: /* RW */
case VIDIOC_DQBUF: /* RW */
return print_v4l2_buffer(tcp, code, arg);
case VIDIOC_G_FBUF: /* R */
if (entering(tcp))
return 0;
ATTRIBUTE_FALLTHROUGH;
case VIDIOC_S_FBUF: /* W */
return print_v4l2_framebuffer(tcp, arg);
case VIDIOC_STREAMON: /* W */
case VIDIOC_STREAMOFF: /* W */
return print_v4l2_buf_type(tcp, arg);
case VIDIOC_G_PARM: /* RW */
case VIDIOC_S_PARM: /* RW */
return print_v4l2_streamparm(tcp, arg, code == VIDIOC_G_PARM);
case VIDIOC_G_STD: /* R */
if (entering(tcp))
return 0;
ATTRIBUTE_FALLTHROUGH;
case VIDIOC_S_STD: /* W */
tprints(", ");
printnum_int64(tcp, arg, "%#" PRIx64);
break;
case VIDIOC_ENUMSTD: /* RW */
return print_v4l2_standard(tcp, arg);
case VIDIOC_ENUMINPUT: /* RW */
return print_v4l2_input(tcp, arg);
case VIDIOC_G_CTRL: /* RW */
case VIDIOC_S_CTRL: /* RW */
return print_v4l2_control(tcp, arg, code == VIDIOC_G_CTRL);
case VIDIOC_G_TUNER: /* RW */
case VIDIOC_S_TUNER: /* RW */
return print_v4l2_tuner(tcp, arg, code == VIDIOC_G_TUNER);
case VIDIOC_QUERYCTRL: /* RW */
return print_v4l2_queryctrl(tcp, arg);
case VIDIOC_G_INPUT: /* R */
if (entering(tcp))
return 0;
ATTRIBUTE_FALLTHROUGH;
case VIDIOC_S_INPUT: /* RW */
tprints(", ");
printnum_int(tcp, arg, "%u");
break;
case VIDIOC_CROPCAP: /* RW */
return print_v4l2_cropcap(tcp, arg);
case VIDIOC_G_CROP: /* RW */
case VIDIOC_S_CROP: /* W */
return print_v4l2_crop(tcp, arg, code == VIDIOC_G_CROP);
#ifdef VIDIOC_S_EXT_CTRLS
case VIDIOC_S_EXT_CTRLS: /* RW */
case VIDIOC_TRY_EXT_CTRLS: /* RW */
case VIDIOC_G_EXT_CTRLS: /* RW */
return print_v4l2_ext_controls(tcp, arg,
code == VIDIOC_G_EXT_CTRLS);
#endif /* VIDIOC_S_EXT_CTRLS */
#ifdef VIDIOC_ENUM_FRAMESIZES
case VIDIOC_ENUM_FRAMESIZES: /* RW */
return print_v4l2_frmsizeenum(tcp, arg);
#endif /* VIDIOC_ENUM_FRAMESIZES */
#ifdef VIDIOC_ENUM_FRAMEINTERVALS
case VIDIOC_ENUM_FRAMEINTERVALS: /* RW */
return print_v4l2_frmivalenum(tcp, arg);
#endif /* VIDIOC_ENUM_FRAMEINTERVALS */
#ifdef VIDIOC_CREATE_BUFS
case VIDIOC_CREATE_BUFS: /* RW */
return print_v4l2_create_buffers(tcp, arg);
#endif /* VIDIOC_CREATE_BUFS */
default:
return RVAL_DECODED;
}
return RVAL_IOCTL_DECODED;
}
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