188 lines · c
1// SPDX-License-Identifier: LGPL-2.12/*3 * trace/beauty/ioctl.c4 *5 * Copyright (C) 2017, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>6 */7 8#include "trace/beauty/beauty.h"9#include <linux/kernel.h>10 11/*12 * FIXME: to support all arches we have to improve this, for13 * now, to build on older systems without things like TIOCGEXCL,14 * get it directly from our copy.15 *16 * Right now only x86 is being supported for beautifying ioctl args17 * in 'perf trace', see tools/perf/trace/beauty/Build and builtin-trace.c18 */19#include <uapi/asm-generic/ioctls.h>20 21static size_t ioctl__scnprintf_tty_cmd(int nr, int dir, char *bf, size_t size)22{23 static const char *ioctl_tty_cmd[] = {24 [_IOC_NR(TCGETS)] = "TCGETS", "TCSETS", "TCSETSW", "TCSETSF", "TCGETA", "TCSETA", "TCSETAW",25 "TCSETAF", "TCSBRK", "TCXONC", "TCFLSH", "TIOCEXCL", "TIOCNXCL", "TIOCSCTTY",26 "TIOCGPGRP", "TIOCSPGRP", "TIOCOUTQ", "TIOCSTI", "TIOCGWINSZ", "TIOCSWINSZ",27 "TIOCMGET", "TIOCMBIS", "TIOCMBIC", "TIOCMSET", "TIOCGSOFTCAR", "TIOCSSOFTCAR",28 "FIONREAD", "TIOCLINUX", "TIOCCONS", "TIOCGSERIAL", "TIOCSSERIAL", "TIOCPKT",29 "FIONBIO", "TIOCNOTTY", "TIOCSETD", "TIOCGETD", "TCSBRKP",30 [_IOC_NR(TIOCSBRK)] = "TIOCSBRK", "TIOCCBRK", "TIOCGSID", "TCGETS2", "TCSETS2",31 "TCSETSW2", "TCSETSF2", "TIOCGRS48", "TIOCSRS485", "TIOCGPTN", "TIOCSPTLCK",32 "TIOCGDEV", "TCSETX", "TCSETXF", "TCSETXW", "TIOCSIG", "TIOCVHANGUP", "TIOCGPKT",33 "TIOCGPTLCK", [_IOC_NR(TIOCGEXCL)] = "TIOCGEXCL", "TIOCGPTPEER",34 "TIOCGISO7816", "TIOCSISO7816",35 [_IOC_NR(FIONCLEX)] = "FIONCLEX", "FIOCLEX", "FIOASYNC", "TIOCSERCONFIG",36 "TIOCSERGWILD", "TIOCSERSWILD", "TIOCGLCKTRMIOS", "TIOCSLCKTRMIOS",37 "TIOCSERGSTRUCT", "TIOCSERGETLSR", "TIOCSERGETMULTI", "TIOCSERSETMULTI",38 "TIOCMIWAIT", "TIOCGICOUNT", };39 static DEFINE_STRARRAY(ioctl_tty_cmd, "");40 41 if (nr < strarray__ioctl_tty_cmd.nr_entries && strarray__ioctl_tty_cmd.entries[nr] != NULL)42 return scnprintf(bf, size, "%s", strarray__ioctl_tty_cmd.entries[nr]);43 44 return scnprintf(bf, size, "(%#x, %#x, %#x)", 'T', nr, dir);45}46 47static size_t ioctl__scnprintf_drm_cmd(int nr, int dir, char *bf, size_t size)48{49#include "trace/beauty/generated/ioctl/drm_ioctl_array.c"50 static DEFINE_STRARRAY(drm_ioctl_cmds, "");51 52 if (nr < strarray__drm_ioctl_cmds.nr_entries && strarray__drm_ioctl_cmds.entries[nr] != NULL)53 return scnprintf(bf, size, "DRM_%s", strarray__drm_ioctl_cmds.entries[nr]);54 55 return scnprintf(bf, size, "(%#x, %#x, %#x)", 'd', nr, dir);56}57 58static size_t ioctl__scnprintf_sndrv_pcm_cmd(int nr, int dir, char *bf, size_t size)59{60#include "trace/beauty/generated/ioctl/sndrv_pcm_ioctl_array.c"61 static DEFINE_STRARRAY(sndrv_pcm_ioctl_cmds, "");62 63 if (nr < strarray__sndrv_pcm_ioctl_cmds.nr_entries && strarray__sndrv_pcm_ioctl_cmds.entries[nr] != NULL)64 return scnprintf(bf, size, "SNDRV_PCM_%s", strarray__sndrv_pcm_ioctl_cmds.entries[nr]);65 66 return scnprintf(bf, size, "(%#x, %#x, %#x)", 'A', nr, dir);67}68 69static size_t ioctl__scnprintf_sndrv_ctl_cmd(int nr, int dir, char *bf, size_t size)70{71#include "trace/beauty/generated/ioctl/sndrv_ctl_ioctl_array.c"72 static DEFINE_STRARRAY(sndrv_ctl_ioctl_cmds, "");73 74 if (nr < strarray__sndrv_ctl_ioctl_cmds.nr_entries && strarray__sndrv_ctl_ioctl_cmds.entries[nr] != NULL)75 return scnprintf(bf, size, "SNDRV_CTL_%s", strarray__sndrv_ctl_ioctl_cmds.entries[nr]);76 77 return scnprintf(bf, size, "(%#x, %#x, %#x)", 'U', nr, dir);78}79 80static size_t ioctl__scnprintf_kvm_cmd(int nr, int dir, char *bf, size_t size)81{82#include "trace/beauty/generated/ioctl/kvm_ioctl_array.c"83 static DEFINE_STRARRAY(kvm_ioctl_cmds, "");84 85 if (nr < strarray__kvm_ioctl_cmds.nr_entries && strarray__kvm_ioctl_cmds.entries[nr] != NULL)86 return scnprintf(bf, size, "KVM_%s", strarray__kvm_ioctl_cmds.entries[nr]);87 88 return scnprintf(bf, size, "(%#x, %#x, %#x)", 0xAE, nr, dir);89}90 91static size_t ioctl__scnprintf_vhost_virtio_cmd(int nr, int dir, char *bf, size_t size)92{93#include "trace/beauty/generated/ioctl/vhost_virtio_ioctl_array.c"94 static DEFINE_STRARRAY(vhost_virtio_ioctl_cmds, "");95 static DEFINE_STRARRAY(vhost_virtio_ioctl_read_cmds, "");96 struct strarray *s = (dir & _IOC_READ) ? &strarray__vhost_virtio_ioctl_read_cmds : &strarray__vhost_virtio_ioctl_cmds;97 98 if (nr < s->nr_entries && s->entries[nr] != NULL)99 return scnprintf(bf, size, "VHOST_%s", s->entries[nr]);100 101 return scnprintf(bf, size, "(%#x, %#x, %#x)", 0xAF, nr, dir);102}103 104static size_t ioctl__scnprintf_perf_cmd(int nr, int dir, char *bf, size_t size)105{106#include "trace/beauty/generated/ioctl/perf_ioctl_array.c"107 static DEFINE_STRARRAY(perf_ioctl_cmds, "");108 109 if (nr < strarray__perf_ioctl_cmds.nr_entries && strarray__perf_ioctl_cmds.entries[nr] != NULL)110 return scnprintf(bf, size, "PERF_%s", strarray__perf_ioctl_cmds.entries[nr]);111 112 return scnprintf(bf, size, "(%#x, %#x, %#x)", 0xAE, nr, dir);113}114 115static size_t ioctl__scnprintf_usbdevfs_cmd(int nr, int dir, char *bf, size_t size)116{117#include "trace/beauty/generated/ioctl/usbdevfs_ioctl_array.c"118 static DEFINE_STRARRAY(usbdevfs_ioctl_cmds, "");119 120 if (nr < strarray__usbdevfs_ioctl_cmds.nr_entries && strarray__usbdevfs_ioctl_cmds.entries[nr] != NULL)121 return scnprintf(bf, size, "USBDEVFS_%s", strarray__usbdevfs_ioctl_cmds.entries[nr]);122 123 return scnprintf(bf, size, "(%c, %#x, %#x)", 'U', nr, dir);124}125 126static size_t ioctl__scnprintf_cmd(unsigned long cmd, char *bf, size_t size, bool show_prefix)127{128 const char *prefix = "_IOC_";129 int dir = _IOC_DIR(cmd),130 type = _IOC_TYPE(cmd),131 nr = _IOC_NR(cmd),132 sz = _IOC_SIZE(cmd);133 int printed = 0;134 static const struct ioctl_type {135 int type;136 size_t (*scnprintf)(int nr, int dir, char *bf, size_t size);137 } ioctl_types[] = { /* Must be ordered by type */138 { .type = '$', .scnprintf = ioctl__scnprintf_perf_cmd, },139 ['A' - '$'] = { .type = 'A', .scnprintf = ioctl__scnprintf_sndrv_pcm_cmd, },140 ['T' - '$'] = { .type = 'T', .scnprintf = ioctl__scnprintf_tty_cmd, },141 ['U' - '$'] = { .type = 'U', .scnprintf = ioctl__scnprintf_sndrv_ctl_cmd, },142 ['d' - '$'] = { .type = 'd', .scnprintf = ioctl__scnprintf_drm_cmd, },143 [0xAE - '$'] = { .type = 0xAE, .scnprintf = ioctl__scnprintf_kvm_cmd, },144 [0xAF - '$'] = { .type = 0xAF, .scnprintf = ioctl__scnprintf_vhost_virtio_cmd, },145 };146 const int nr_types = ARRAY_SIZE(ioctl_types);147 148 if (type >= ioctl_types[0].type && type <= ioctl_types[nr_types - 1].type) {149 const int index = type - ioctl_types[0].type;150 151 if (ioctl_types[index].scnprintf != NULL)152 return ioctl_types[index].scnprintf(nr, dir, bf, size);153 }154 155 printed += scnprintf(bf + printed, size - printed, "%c", '(');156 157 if (dir == _IOC_NONE) {158 printed += scnprintf(bf + printed, size - printed, "%s%s", show_prefix ? prefix : "", "NONE");159 } else {160 if (dir & _IOC_READ)161 printed += scnprintf(bf + printed, size - printed, "%s%s", show_prefix ? prefix : "", "READ");162 if (dir & _IOC_WRITE) {163 printed += scnprintf(bf + printed, size - printed, "%s%s%s", dir & _IOC_READ ? "|" : "",164 show_prefix ? prefix : "", "WRITE");165 }166 }167 168 return printed + scnprintf(bf + printed, size - printed, ", %#x, %#x, %#x)", type, nr, sz);169}170 171#ifndef USB_DEVICE_MAJOR172#define USB_DEVICE_MAJOR 189173#endif // USB_DEVICE_MAJOR174 175size_t syscall_arg__scnprintf_ioctl_cmd(char *bf, size_t size, struct syscall_arg *arg)176{177 unsigned long cmd = arg->val;178 int fd = syscall_arg__val(arg, 0);179 struct file *file = thread__files_entry(arg->thread, fd);180 181 if (file != NULL) {182 if (file->dev_maj == USB_DEVICE_MAJOR)183 return ioctl__scnprintf_usbdevfs_cmd(_IOC_NR(cmd), _IOC_DIR(cmd), bf, size);184 }185 186 return ioctl__scnprintf_cmd(cmd, bf, size, arg->show_string_prefix);187}188