ioctl.c (7595B)
1// SPDX-License-Identifier: LGPL-2.1 2/* 3 * trace/beauty/ioctl.c 4 * 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, for 13 * 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 args 17 * in 'perf trace', see tools/perf/trace/beauty/Build and builtin-trace.c 18 */ 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_MAJOR 172#define USB_DEVICE_MAJOR 189 173#endif // USB_DEVICE_MAJOR 174 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}