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