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/*
* trace/beauty/ioctl.c
*
* Copyright (C) 2017, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
*
* Released under the GPL v2. (and only v2, not any later version)
*/
#include "trace/beauty/beauty.h"
#include <linux/kernel.h>
/*
* FIXME: to support all arches we have to improve this, for
* now, to build on older systems without things like TIOCGEXCL,
* get it directly from our copy.
*
* Right now only x86 is being supported for beautifying ioctl args
* in 'perf trace', see tools/perf/trace/beauty/Build and builtin-trace.c
*/
#include <uapi/asm-generic/ioctls.h>
static size_t ioctl__scnprintf_tty_cmd(int nr, char *bf, size_t size)
{
static const char *ioctl_tty_cmd[] = {
"TCGETS", "TCSETS", "TCSETSW", "TCSETSF", "TCGETA", "TCSETA", "TCSETAW",
"TCSETAF", "TCSBRK", "TCXONC", "TCFLSH", "TIOCEXCL", "TIOCNXCL", "TIOCSCTTY",
"TIOCGPGRP", "TIOCSPGRP", "TIOCOUTQ", "TIOCSTI", "TIOCGWINSZ", "TIOCSWINSZ",
"TIOCMGET", "TIOCMBIS", "TIOCMBIC", "TIOCMSET", "TIOCGSOFTCAR", "TIOCSSOFTCAR",
"FIONREAD", "TIOCLINUX", "TIOCCONS", "TIOCGSERIAL", "TIOCSSERIAL", "TIOCPKT",
"FIONBIO", "TIOCNOTTY", "TIOCSETD", "TIOCGETD", "TCSBRKP",
[_IOC_NR(TIOCSBRK)] = "TIOCSBRK", "TIOCCBRK", "TIOCGSID", "TCGETS2", "TCSETS2",
"TCSETSW2", "TCSETSF2", "TIOCGRS48", "TIOCSRS485", "TIOCGPTN", "TIOCSPTLCK",
"TIOCGDEV", "TCSETX", "TCSETXF", "TCSETXW", "TIOCSIG", "TIOCVHANGUP", "TIOCGPKT",
"TIOCGPTLCK", [_IOC_NR(TIOCGEXCL)] = "TIOCGEXCL", "TIOCGPTPEER",
[_IOC_NR(FIONCLEX)] = "FIONCLEX", "FIOCLEX", "FIOASYNC", "TIOCSERCONFIG",
"TIOCSERGWILD", "TIOCSERSWILD", "TIOCGLCKTRMIOS", "TIOCSLCKTRMIOS",
"TIOCSERGSTRUCT", "TIOCSERGETLSR", "TIOCSERGETMULTI", "TIOCSERSETMULTI",
"TIOCMIWAIT", "TIOCGICOUNT", };
static DEFINE_STRARRAY(ioctl_tty_cmd);
if (nr < strarray__ioctl_tty_cmd.nr_entries && strarray__ioctl_tty_cmd.entries[nr] != NULL)
return scnprintf(bf, size, "%s", strarray__ioctl_tty_cmd.entries[nr]);
return scnprintf(bf, size, "(%#x, %#x)", 'T', nr);
}
static size_t ioctl__scnprintf_cmd(unsigned long cmd, char *bf, size_t size)
{
int dir = _IOC_DIR(cmd),
type = _IOC_TYPE(cmd),
nr = _IOC_NR(cmd),
sz = _IOC_SIZE(cmd);
int printed = 0;
static const struct ioctl_type {
int type;
size_t (*scnprintf)(int nr, char *bf, size_t size);
} ioctl_types[] = { /* Must be ordered by type */
{ .type = 'T', .scnprintf = ioctl__scnprintf_tty_cmd, }
};
const int nr_types = ARRAY_SIZE(ioctl_types);
if (type >= ioctl_types[0].type && type <= ioctl_types[nr_types - 1].type) {
const int index = type - ioctl_types[0].type;
if (ioctl_types[index].scnprintf != NULL)
return ioctl_types[index].scnprintf(nr, bf, size);
}
printed += scnprintf(bf + printed, size - printed, "%c", '(');
if (dir == _IOC_NONE) {
printed += scnprintf(bf + printed, size - printed, "%s", "NONE");
} else {
if (dir & _IOC_READ)
printed += scnprintf(bf + printed, size - printed, "%s", "READ");
if (dir & _IOC_WRITE)
printed += scnprintf(bf + printed, size - printed, "%s%s", dir & _IOC_READ ? "|" : "", "WRITE");
}
return printed + scnprintf(bf + printed, size - printed, ", %#x, %#x, %#x)", type, nr, sz);
}
size_t syscall_arg__scnprintf_ioctl_cmd(char *bf, size_t size, struct syscall_arg *arg)
{
unsigned long cmd = arg->val;
return ioctl__scnprintf_cmd(cmd, bf, size);
}
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