1 /* 2 * trace/beauty/ioctl.c 3 * 4 * Copyright (C) 2017, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> 5 * 6 * Released under the GPL v2. (and only v2, not any later version) 7 */ 8 9 #include "trace/beauty/beauty.h" 10 #include <linux/kernel.h> 11 12 /* 13 * FIXME: to support all arches we have to improve this, for 14 * now, to build on older systems without things like TIOCGEXCL, 15 * get it directly from our copy. 16 * 17 * Right now only x86 is being supported for beautifying ioctl args 18 * in 'perf trace', see tools/perf/trace/beauty/Build and builtin-trace.c 19 */ 20 #include <uapi/asm-generic/ioctls.h> 21 22 static size_t ioctl__scnprintf_tty_cmd(int nr, int dir, char *bf, size_t size) 23 { 24 static const char *ioctl_tty_cmd[] = { 25 "TCGETS", "TCSETS", "TCSETSW", "TCSETSF", "TCGETA", "TCSETA", "TCSETAW", 26 "TCSETAF", "TCSBRK", "TCXONC", "TCFLSH", "TIOCEXCL", "TIOCNXCL", "TIOCSCTTY", 27 "TIOCGPGRP", "TIOCSPGRP", "TIOCOUTQ", "TIOCSTI", "TIOCGWINSZ", "TIOCSWINSZ", 28 "TIOCMGET", "TIOCMBIS", "TIOCMBIC", "TIOCMSET", "TIOCGSOFTCAR", "TIOCSSOFTCAR", 29 "FIONREAD", "TIOCLINUX", "TIOCCONS", "TIOCGSERIAL", "TIOCSSERIAL", "TIOCPKT", 30 "FIONBIO", "TIOCNOTTY", "TIOCSETD", "TIOCGETD", "TCSBRKP", 31 [_IOC_NR(TIOCSBRK)] = "TIOCSBRK", "TIOCCBRK", "TIOCGSID", "TCGETS2", "TCSETS2", 32 "TCSETSW2", "TCSETSF2", "TIOCGRS48", "TIOCSRS485", "TIOCGPTN", "TIOCSPTLCK", 33 "TIOCGDEV", "TCSETX", "TCSETXF", "TCSETXW", "TIOCSIG", "TIOCVHANGUP", "TIOCGPKT", 34 "TIOCGPTLCK", [_IOC_NR(TIOCGEXCL)] = "TIOCGEXCL", "TIOCGPTPEER", 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 47 static 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 58 static 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 69 static 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 80 static 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 91 static 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 } 103 104 static 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 } 114 115 static size_t ioctl__scnprintf_cmd(unsigned long cmd, char *bf, size_t size) 116 { 117 int dir = _IOC_DIR(cmd), 118 type = _IOC_TYPE(cmd), 119 nr = _IOC_NR(cmd), 120 sz = _IOC_SIZE(cmd); 121 int printed = 0; 122 static const struct ioctl_type { 123 int type; 124 size_t (*scnprintf)(int nr, int dir, char *bf, size_t size); 125 } ioctl_types[] = { /* Must be ordered by type */ 126 { .type = '$', .scnprintf = ioctl__scnprintf_perf_cmd, }, 127 ['A' - '$'] = { .type = 'A', .scnprintf = ioctl__scnprintf_sndrv_pcm_cmd, }, 128 ['T' - '$'] = { .type = 'T', .scnprintf = ioctl__scnprintf_tty_cmd, }, 129 ['U' - '$'] = { .type = 'U', .scnprintf = ioctl__scnprintf_sndrv_ctl_cmd, }, 130 ['d' - '$'] = { .type = 'd', .scnprintf = ioctl__scnprintf_drm_cmd, }, 131 [0xAE - '$'] = { .type = 0xAE, .scnprintf = ioctl__scnprintf_kvm_cmd, }, 132 [0xAF - '$'] = { .type = 0xAF, .scnprintf = ioctl__scnprintf_vhost_virtio_cmd, }, 133 }; 134 const int nr_types = ARRAY_SIZE(ioctl_types); 135 136 if (type >= ioctl_types[0].type && type <= ioctl_types[nr_types - 1].type) { 137 const int index = type - ioctl_types[0].type; 138 139 if (ioctl_types[index].scnprintf != NULL) 140 return ioctl_types[index].scnprintf(nr, dir, bf, size); 141 } 142 143 printed += scnprintf(bf + printed, size - printed, "%c", '('); 144 145 if (dir == _IOC_NONE) { 146 printed += scnprintf(bf + printed, size - printed, "%s", "NONE"); 147 } else { 148 if (dir & _IOC_READ) 149 printed += scnprintf(bf + printed, size - printed, "%s", "READ"); 150 if (dir & _IOC_WRITE) 151 printed += scnprintf(bf + printed, size - printed, "%s%s", dir & _IOC_READ ? "|" : "", "WRITE"); 152 } 153 154 return printed + scnprintf(bf + printed, size - printed, ", %#x, %#x, %#x)", type, nr, sz); 155 } 156 157 size_t syscall_arg__scnprintf_ioctl_cmd(char *bf, size_t size, struct syscall_arg *arg) 158 { 159 unsigned long cmd = arg->val; 160 161 return ioctl__scnprintf_cmd(cmd, bf, size); 162 } 163