1 | // SPDX-License-Identifier: LGPL-2.1 |
2 | /* |
3 | * trace/beauty/fcntl.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 | #include <uapi/linux/fcntl.h> |
11 | |
12 | static size_t fcntl__scnprintf_getfd(unsigned long val, char *bf, size_t size, bool show_prefix) |
13 | { |
14 | return val ? scnprintf(buf: bf, size, fmt: "%s" , "0" ) : |
15 | scnprintf(buf: bf, size, fmt: "%s%s" , show_prefix ? "FD_" : "" , "CLOEXEC" ); |
16 | } |
17 | |
18 | static size_t syscall_arg__scnprintf_fcntl_getfd(char *bf, size_t size, struct syscall_arg *arg) |
19 | { |
20 | return fcntl__scnprintf_getfd(val: arg->val, bf, size, show_prefix: arg->show_string_prefix); |
21 | } |
22 | |
23 | static size_t fcntl__scnprintf_getlease(unsigned long val, char *bf, size_t size, bool show_prefix) |
24 | { |
25 | static const char *fcntl_setlease[] = { "RDLCK" , "WRLCK" , "UNLCK" , }; |
26 | static DEFINE_STRARRAY(fcntl_setlease, "F_" ); |
27 | |
28 | return strarray__scnprintf(&strarray__fcntl_setlease, bf, size, "%x" , show_prefix, val); |
29 | } |
30 | |
31 | static size_t syscall_arg__scnprintf_fcntl_getlease(char *bf, size_t size, struct syscall_arg *arg) |
32 | { |
33 | return fcntl__scnprintf_getlease(val: arg->val, bf, size, show_prefix: arg->show_string_prefix); |
34 | } |
35 | |
36 | size_t syscall_arg__scnprintf_fcntl_cmd(char *bf, size_t size, struct syscall_arg *arg) |
37 | { |
38 | if (arg->val == F_GETFL) { |
39 | syscall_arg__set_ret_scnprintf(arg, syscall_arg__scnprintf_open_flags); |
40 | goto mask_arg; |
41 | } |
42 | if (arg->val == F_GETFD) { |
43 | syscall_arg__set_ret_scnprintf(arg, syscall_arg__scnprintf_fcntl_getfd); |
44 | goto mask_arg; |
45 | } |
46 | if (arg->val == F_DUPFD_CLOEXEC || arg->val == F_DUPFD) { |
47 | syscall_arg__set_ret_scnprintf(arg, syscall_arg__scnprintf_fd); |
48 | goto out; |
49 | } |
50 | if (arg->val == F_GETOWN) { |
51 | syscall_arg__set_ret_scnprintf(arg, syscall_arg__scnprintf_pid); |
52 | goto mask_arg; |
53 | } |
54 | if (arg->val == F_GETLEASE) { |
55 | syscall_arg__set_ret_scnprintf(arg, syscall_arg__scnprintf_fcntl_getlease); |
56 | goto mask_arg; |
57 | } |
58 | /* |
59 | * Some commands ignore the third fcntl argument, "arg", so mask it |
60 | */ |
61 | if (arg->val == F_GET_SEALS || |
62 | arg->val == F_GETSIG) { |
63 | mask_arg: |
64 | arg->mask |= (1 << 2); |
65 | } |
66 | out: |
67 | return syscall_arg__scnprintf_strarrays(bf, size, arg); |
68 | } |
69 | |
70 | size_t syscall_arg__scnprintf_fcntl_arg(char *bf, size_t size, struct syscall_arg *arg) |
71 | { |
72 | bool show_prefix = arg->show_string_prefix; |
73 | int cmd = syscall_arg__val(arg, 1); |
74 | |
75 | if (cmd == F_DUPFD) |
76 | return syscall_arg__scnprintf_fd(bf, size, arg); |
77 | |
78 | if (cmd == F_SETFD) |
79 | return fcntl__scnprintf_getfd(val: arg->val, bf, size, show_prefix); |
80 | |
81 | if (cmd == F_SETFL) |
82 | return open__scnprintf_flags(arg->val, bf, size, show_prefix); |
83 | |
84 | if (cmd == F_SETOWN) |
85 | return syscall_arg__scnprintf_pid(bf, size, arg); |
86 | |
87 | if (cmd == F_SETLEASE) |
88 | return fcntl__scnprintf_getlease(val: arg->val, bf, size, show_prefix); |
89 | /* |
90 | * We still don't grab the contents of pointers on entry or exit, |
91 | * so just print them as hex numbers |
92 | */ |
93 | if (cmd == F_SETLK || cmd == F_SETLKW || cmd == F_GETLK || |
94 | cmd == F_OFD_SETLK || cmd == F_OFD_SETLKW || cmd == F_OFD_GETLK || |
95 | cmd == F_GETOWN_EX || cmd == F_SETOWN_EX || |
96 | cmd == F_GET_RW_HINT || cmd == F_SET_RW_HINT || |
97 | cmd == F_GET_FILE_RW_HINT || cmd == F_SET_FILE_RW_HINT) |
98 | return syscall_arg__scnprintf_hex(bf, size, arg); |
99 | |
100 | return syscall_arg__scnprintf_long(bf, size, arg); |
101 | } |
102 | |