trace/beauty/fcntl.c

0001 // SPDX-License-Identifier: LGPL-2.1
0002 /*
0003  * trace/beauty/fcntl.c
0004  *
0005  *  Copyright (C) 2017, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
0006  */
0007
0008 #include "trace/beauty/beauty.h"
0009 #include <linux/kernel.h>
0010 #include <uapi/linux/fcntl.h>
0011
0012 static size_t fcntl__scnprintf_getfd(unsigned long val, char *bf, size_t size, bool show_prefix)
0013 {
0014     return val ? scnprintf(bf, size, "%s", "0") :
0015              scnprintf(bf, size, "%s%s", show_prefix ? "FD_" : "", "CLOEXEC");
0016 }
0017
0018 static size_t syscall_arg__scnprintf_fcntl_getfd(char *bf, size_t size, struct syscall_arg *arg)
0019 {
0020     return fcntl__scnprintf_getfd(arg->val, bf, size, arg->show_string_prefix);
0021 }
0022
0023 static size_t fcntl__scnprintf_getlease(unsigned long val, char *bf, size_t size, bool show_prefix)
0024 {
0025     static const char *fcntl_setlease[] = { "RDLCK", "WRLCK", "UNLCK", };
0026     static DEFINE_STRARRAY(fcntl_setlease, "F_");
0027
0028     return strarray__scnprintf(&strarray__fcntl_setlease, bf, size, "%x", show_prefix, val);
0029 }
0030
0031 static size_t syscall_arg__scnprintf_fcntl_getlease(char *bf, size_t size, struct syscall_arg *arg)
0032 {
0033     return fcntl__scnprintf_getlease(arg->val, bf, size, arg->show_string_prefix);
0034 }
0035
0036 size_t syscall_arg__scnprintf_fcntl_cmd(char *bf, size_t size, struct syscall_arg *arg)
0037 {
0038     if (arg->val == F_GETFL) {
0039         syscall_arg__set_ret_scnprintf(arg, syscall_arg__scnprintf_open_flags);
0040         goto mask_arg;
0041     }
0042     if (arg->val == F_GETFD) {
0043         syscall_arg__set_ret_scnprintf(arg, syscall_arg__scnprintf_fcntl_getfd);
0044         goto mask_arg;
0045     }
0046     if (arg->val == F_DUPFD_CLOEXEC || arg->val == F_DUPFD) {
0047         syscall_arg__set_ret_scnprintf(arg, syscall_arg__scnprintf_fd);
0048         goto out;
0049     }
0050     if (arg->val == F_GETOWN) {
0051         syscall_arg__set_ret_scnprintf(arg, syscall_arg__scnprintf_pid);
0052         goto mask_arg;
0053     }
0054     if (arg->val == F_GETLEASE) {
0055         syscall_arg__set_ret_scnprintf(arg, syscall_arg__scnprintf_fcntl_getlease);
0056         goto mask_arg;
0057     }
0058     /*
0059      * Some commands ignore the third fcntl argument, "arg", so mask it
0060      */
0061     if (arg->val == F_GET_SEALS ||
0062         arg->val == F_GETSIG) {
0063 mask_arg:
0064         arg->mask |= (1 << 2);
0065     }
0066 out:
0067     return syscall_arg__scnprintf_strarrays(bf, size, arg);
0068 }
0069
0070 size_t syscall_arg__scnprintf_fcntl_arg(char *bf, size_t size, struct syscall_arg *arg)
0071 {
0072     bool show_prefix = arg->show_string_prefix;
0073     int cmd = syscall_arg__val(arg, 1);
0074
0075     if (cmd == F_DUPFD)
0076         return syscall_arg__scnprintf_fd(bf, size, arg);
0077
0078     if (cmd == F_SETFD)
0079         return fcntl__scnprintf_getfd(arg->val, bf, size, show_prefix);
0080
0081     if (cmd == F_SETFL)
0082         return open__scnprintf_flags(arg->val, bf, size, show_prefix);
0083
0084     if (cmd == F_SETOWN)
0085         return syscall_arg__scnprintf_pid(bf, size, arg);
0086
0087     if (cmd == F_SETLEASE)
0088         return fcntl__scnprintf_getlease(arg->val, bf, size, show_prefix);
0089     /*
0090      * We still don't grab the contents of pointers on entry or exit,
0091      * so just print them as hex numbers
0092      */
0093     if (cmd == F_SETLK || cmd == F_SETLKW || cmd == F_GETLK ||
0094         cmd == F_OFD_SETLK || cmd == F_OFD_SETLKW || cmd == F_OFD_GETLK ||
0095         cmd == F_GETOWN_EX || cmd == F_SETOWN_EX ||
0096         cmd == F_GET_RW_HINT || cmd == F_SET_RW_HINT ||
0097         cmd == F_GET_FILE_RW_HINT || cmd == F_SET_FILE_RW_HINT)
0098         return syscall_arg__scnprintf_hex(bf, size, arg);
0099
0100     return syscall_arg__scnprintf_long(bf, size, arg);
0101 }