Revision eed2ef4403de3d8937ccb624e15d3c5004e7dda5 authored by Linus Torvalds on 01 October 2020, 18:49:01 UTC, committed by Linus Torvalds on 01 October 2020, 18:49:01 UTC
Pull arm64 fix from Catalin Marinas: "A previous commit to prevent AML memory opregions from accessing the kernel memory turned out to be too restrictive. Relax the permission check to permit the ACPI core to map kernel memory used for table overrides" * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: permit ACPI core to map kernel memory used for table overrides
test-statx.c
// SPDX-License-Identifier: GPL-2.0-or-later
/* Test the statx() system call.
*
* Note that the output of this program is intended to look like the output of
* /bin/stat where possible.
*
* Copyright (C) 2015 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*/
#define _GNU_SOURCE
#define _ATFILE_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <ctype.h>
#include <errno.h>
#include <time.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <linux/stat.h>
#include <linux/fcntl.h>
#define statx foo
#define statx_timestamp foo_timestamp
struct statx;
struct statx_timestamp;
#include <sys/stat.h>
#undef statx
#undef statx_timestamp
#define AT_STATX_SYNC_TYPE 0x6000
#define AT_STATX_SYNC_AS_STAT 0x0000
#define AT_STATX_FORCE_SYNC 0x2000
#define AT_STATX_DONT_SYNC 0x4000
#ifndef __NR_statx
#define __NR_statx -1
#endif
static __attribute__((unused))
ssize_t statx(int dfd, const char *filename, unsigned flags,
unsigned int mask, struct statx *buffer)
{
return syscall(__NR_statx, dfd, filename, flags, mask, buffer);
}
static void print_time(const char *field, struct statx_timestamp *ts)
{
struct tm tm;
time_t tim;
char buffer[100];
int len;
tim = ts->tv_sec;
if (!localtime_r(&tim, &tm)) {
perror("localtime_r");
exit(1);
}
len = strftime(buffer, 100, "%F %T", &tm);
if (len == 0) {
perror("strftime");
exit(1);
}
printf("%s", field);
fwrite(buffer, 1, len, stdout);
printf(".%09u", ts->tv_nsec);
len = strftime(buffer, 100, "%z", &tm);
if (len == 0) {
perror("strftime2");
exit(1);
}
fwrite(buffer, 1, len, stdout);
printf("\n");
}
static void dump_statx(struct statx *stx)
{
char buffer[256], ft = '?';
printf("results=%x\n", stx->stx_mask);
printf(" ");
if (stx->stx_mask & STATX_SIZE)
printf(" Size: %-15llu", (unsigned long long)stx->stx_size);
if (stx->stx_mask & STATX_BLOCKS)
printf(" Blocks: %-10llu", (unsigned long long)stx->stx_blocks);
printf(" IO Block: %-6llu", (unsigned long long)stx->stx_blksize);
if (stx->stx_mask & STATX_TYPE) {
switch (stx->stx_mode & S_IFMT) {
case S_IFIFO: printf(" FIFO\n"); ft = 'p'; break;
case S_IFCHR: printf(" character special file\n"); ft = 'c'; break;
case S_IFDIR: printf(" directory\n"); ft = 'd'; break;
case S_IFBLK: printf(" block special file\n"); ft = 'b'; break;
case S_IFREG: printf(" regular file\n"); ft = '-'; break;
case S_IFLNK: printf(" symbolic link\n"); ft = 'l'; break;
case S_IFSOCK: printf(" socket\n"); ft = 's'; break;
default:
printf(" unknown type (%o)\n", stx->stx_mode & S_IFMT);
break;
}
} else {
printf(" no type\n");
}
sprintf(buffer, "%02x:%02x", stx->stx_dev_major, stx->stx_dev_minor);
printf("Device: %-15s", buffer);
if (stx->stx_mask & STATX_INO)
printf(" Inode: %-11llu", (unsigned long long) stx->stx_ino);
if (stx->stx_mask & STATX_NLINK)
printf(" Links: %-5u", stx->stx_nlink);
if (stx->stx_mask & STATX_TYPE) {
switch (stx->stx_mode & S_IFMT) {
case S_IFBLK:
case S_IFCHR:
printf(" Device type: %u,%u",
stx->stx_rdev_major, stx->stx_rdev_minor);
break;
}
}
printf("\n");
if (stx->stx_mask & STATX_MODE)
printf("Access: (%04o/%c%c%c%c%c%c%c%c%c%c) ",
stx->stx_mode & 07777,
ft,
stx->stx_mode & S_IRUSR ? 'r' : '-',
stx->stx_mode & S_IWUSR ? 'w' : '-',
stx->stx_mode & S_IXUSR ? 'x' : '-',
stx->stx_mode & S_IRGRP ? 'r' : '-',
stx->stx_mode & S_IWGRP ? 'w' : '-',
stx->stx_mode & S_IXGRP ? 'x' : '-',
stx->stx_mode & S_IROTH ? 'r' : '-',
stx->stx_mode & S_IWOTH ? 'w' : '-',
stx->stx_mode & S_IXOTH ? 'x' : '-');
if (stx->stx_mask & STATX_UID)
printf("Uid: %5d ", stx->stx_uid);
if (stx->stx_mask & STATX_GID)
printf("Gid: %5d\n", stx->stx_gid);
if (stx->stx_mask & STATX_ATIME)
print_time("Access: ", &stx->stx_atime);
if (stx->stx_mask & STATX_MTIME)
print_time("Modify: ", &stx->stx_mtime);
if (stx->stx_mask & STATX_CTIME)
print_time("Change: ", &stx->stx_ctime);
if (stx->stx_mask & STATX_BTIME)
print_time(" Birth: ", &stx->stx_btime);
if (stx->stx_attributes_mask) {
unsigned char bits, mbits;
int loop, byte;
static char attr_representation[64 + 1] =
/* STATX_ATTR_ flags: */
"????????" /* 63-56 */
"????????" /* 55-48 */
"????????" /* 47-40 */
"????????" /* 39-32 */
"????????" /* 31-24 0x00000000-ff000000 */
"????????" /* 23-16 0x00000000-00ff0000 */
"???me???" /* 15- 8 0x00000000-0000ff00 */
"?dai?c??" /* 7- 0 0x00000000-000000ff */
;
printf("Attributes: %016llx (",
(unsigned long long)stx->stx_attributes);
for (byte = 64 - 8; byte >= 0; byte -= 8) {
bits = stx->stx_attributes >> byte;
mbits = stx->stx_attributes_mask >> byte;
for (loop = 7; loop >= 0; loop--) {
int bit = byte + loop;
if (!(mbits & 0x80))
putchar('.'); /* Not supported */
else if (bits & 0x80)
putchar(attr_representation[63 - bit]);
else
putchar('-'); /* Not set */
bits <<= 1;
mbits <<= 1;
}
if (byte)
putchar(' ');
}
printf(")\n");
}
}
static void dump_hex(unsigned long long *data, int from, int to)
{
unsigned offset, print_offset = 1, col = 0;
from /= 8;
to = (to + 7) / 8;
for (offset = from; offset < to; offset++) {
if (print_offset) {
printf("%04x: ", offset * 8);
print_offset = 0;
}
printf("%016llx", data[offset]);
col++;
if ((col & 3) == 0) {
printf("\n");
print_offset = 1;
} else {
printf(" ");
}
}
if (!print_offset)
printf("\n");
}
int main(int argc, char **argv)
{
struct statx stx;
int ret, raw = 0, atflag = AT_SYMLINK_NOFOLLOW;
unsigned int mask = STATX_BASIC_STATS | STATX_BTIME;
for (argv++; *argv; argv++) {
if (strcmp(*argv, "-F") == 0) {
atflag &= ~AT_STATX_SYNC_TYPE;
atflag |= AT_STATX_FORCE_SYNC;
continue;
}
if (strcmp(*argv, "-D") == 0) {
atflag &= ~AT_STATX_SYNC_TYPE;
atflag |= AT_STATX_DONT_SYNC;
continue;
}
if (strcmp(*argv, "-L") == 0) {
atflag &= ~AT_SYMLINK_NOFOLLOW;
continue;
}
if (strcmp(*argv, "-O") == 0) {
mask &= ~STATX_BASIC_STATS;
continue;
}
if (strcmp(*argv, "-A") == 0) {
atflag |= AT_NO_AUTOMOUNT;
continue;
}
if (strcmp(*argv, "-R") == 0) {
raw = 1;
continue;
}
memset(&stx, 0xbf, sizeof(stx));
ret = statx(AT_FDCWD, *argv, atflag, mask, &stx);
printf("statx(%s) = %d\n", *argv, ret);
if (ret < 0) {
perror(*argv);
exit(1);
}
if (raw)
dump_hex((unsigned long long *)&stx, 0, sizeof(stx));
dump_statx(&stx);
}
return 0;
}
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