cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

fcntl.c (3209B)

      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
     12static size_t fcntl__scnprintf_getfd(unsigned long val, char *bf, size_t size, bool show_prefix)
     13{
     14	return val ? scnprintf(bf, size, "%s", "0") :
     15		     scnprintf(bf, size, "%s%s", show_prefix ? "FD_" : "", "CLOEXEC");
     16}
     17
     18static size_t syscall_arg__scnprintf_fcntl_getfd(char *bf, size_t size, struct syscall_arg *arg)
     19{
     20	return fcntl__scnprintf_getfd(arg->val, bf, size, arg->show_string_prefix);
     21}
     22
     23static 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
     31static size_t syscall_arg__scnprintf_fcntl_getlease(char *bf, size_t size, struct syscall_arg *arg)
     32{
     33	return fcntl__scnprintf_getlease(arg->val, bf, size, arg->show_string_prefix);
     34}
     35
     36size_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) {
     63mask_arg:
     64		arg->mask |= (1 << 2);
     65	}
     66out:
     67	return syscall_arg__scnprintf_strarrays(bf, size, arg);
     68}
     69
     70size_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(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(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}