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 
ioctl__scnprintf_tty_cmd(int nr,int dir,char * bf,size_t size)21 static 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 
ioctl__scnprintf_drm_cmd(int nr,int dir,char * bf,size_t size)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 
ioctl__scnprintf_sndrv_pcm_cmd(int nr,int dir,char * bf,size_t size)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 
ioctl__scnprintf_sndrv_ctl_cmd(int nr,int dir,char * bf,size_t size)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 
ioctl__scnprintf_kvm_cmd(int nr,int dir,char * bf,size_t size)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 
ioctl__scnprintf_vhost_virtio_cmd(int nr,int dir,char * bf,size_t size)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 
ioctl__scnprintf_perf_cmd(int nr,int dir,char * bf,size_t size)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 
ioctl__scnprintf_usbdevfs_cmd(int nr,int dir,char * bf,size_t size)115 static 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 
ioctl__scnprintf_cmd(unsigned long cmd,char * bf,size_t size,bool show_prefix)126 static 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 
syscall_arg__scnprintf_ioctl_cmd(char * bf,size_t size,struct syscall_arg * arg)175 size_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