/*
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* trace/beauty/fcntl.c
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*
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* Copyright (C) 2017, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
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*
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* Released under the GPL v2. (and only v2, not any later version)
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*/
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#include "trace/beauty/beauty.h"
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#include <linux/kernel.h>
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#include <uapi/linux/fcntl.h>
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static size_t fcntl__scnprintf_getfd(unsigned long val, char *bf, size_t size)
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{
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return scnprintf(bf, size, "%s", val ? "CLOEXEC" : "0");
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}
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static size_t syscall_arg__scnprintf_fcntl_getfd(char *bf, size_t size, struct syscall_arg *arg)
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{
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return fcntl__scnprintf_getfd(arg->val, bf, size);
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}
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static size_t fcntl__scnprintf_getlease(unsigned long val, char *bf, size_t size)
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{
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static const char *fcntl_setlease[] = { "RDLCK", "WRLCK", "UNLCK", };
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static DEFINE_STRARRAY(fcntl_setlease);
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return strarray__scnprintf(&strarray__fcntl_setlease, bf, size, "%x", val);
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}
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static size_t syscall_arg__scnprintf_fcntl_getlease(char *bf, size_t size, struct syscall_arg *arg)
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{
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return fcntl__scnprintf_getlease(arg->val, bf, size);
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}
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size_t syscall_arg__scnprintf_fcntl_cmd(char *bf, size_t size, struct syscall_arg *arg)
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{
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if (arg->val == F_GETFL) {
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syscall_arg__set_ret_scnprintf(arg, syscall_arg__scnprintf_open_flags);
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goto mask_arg;
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}
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if (arg->val == F_GETFD) {
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syscall_arg__set_ret_scnprintf(arg, syscall_arg__scnprintf_fcntl_getfd);
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goto mask_arg;
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}
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if (arg->val == F_DUPFD_CLOEXEC || arg->val == F_DUPFD) {
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syscall_arg__set_ret_scnprintf(arg, syscall_arg__scnprintf_fd);
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goto out;
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}
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if (arg->val == F_GETOWN) {
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syscall_arg__set_ret_scnprintf(arg, syscall_arg__scnprintf_pid);
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goto mask_arg;
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}
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if (arg->val == F_GETLEASE) {
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syscall_arg__set_ret_scnprintf(arg, syscall_arg__scnprintf_fcntl_getlease);
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goto mask_arg;
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}
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/*
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* Some commands ignore the third fcntl argument, "arg", so mask it
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*/
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if (arg->val == F_GET_SEALS ||
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arg->val == F_GETSIG) {
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mask_arg:
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arg->mask |= (1 << 2);
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}
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out:
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return syscall_arg__scnprintf_strarrays(bf, size, arg);
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}
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size_t syscall_arg__scnprintf_fcntl_arg(char *bf, size_t size, struct syscall_arg *arg)
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{
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int cmd = syscall_arg__val(arg, 1);
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if (cmd == F_DUPFD)
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return syscall_arg__scnprintf_fd(bf, size, arg);
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if (cmd == F_SETFD)
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return fcntl__scnprintf_getfd(arg->val, bf, size);
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if (cmd == F_SETFL)
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return open__scnprintf_flags(arg->val, bf, size);
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if (cmd == F_SETOWN)
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return syscall_arg__scnprintf_pid(bf, size, arg);
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if (cmd == F_SETLEASE)
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return fcntl__scnprintf_getlease(arg->val, bf, size);
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/*
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* We still don't grab the contents of pointers on entry or exit,
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* so just print them as hex numbers
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*/
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if (cmd == F_SETLK || cmd == F_SETLKW || cmd == F_GETLK ||
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cmd == F_OFD_SETLK || cmd == F_OFD_SETLKW || cmd == F_OFD_GETLK ||
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cmd == F_GETOWN_EX || cmd == F_SETOWN_EX ||
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cmd == F_GET_RW_HINT || cmd == F_SET_RW_HINT ||
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cmd == F_GET_FILE_RW_HINT || cmd == F_SET_FILE_RW_HINT)
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return syscall_arg__scnprintf_hex(bf, size, arg);
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return syscall_arg__scnprintf_long(bf, size, arg);
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}
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