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tests: additional name_to_handle_at/open_by_handle_at checks

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* tests/file_handle.c: Additional name_to_handle_at/open_by_handle_at
checks.
This commit is contained in:
Eugene Syromyatnikov
2016-10-23 23:33:02 +03:00
parent ad7f4354d5
commit 9a4eb55465
1 changed files with 260 additions and 7 deletions
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267
tests/file_handle.c
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@ -1,5 +1,8 @@
/*
* Check decoding of name_to_handle_at and open_by_handle_at syscalls.
*
* Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
* Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -30,13 +33,21 @@
#if defined __NR_name_to_handle_at && defined __NR_open_by_handle_at
# include <alloca.h>
# include <assert.h>
# include <errno.h>
# include <inttypes.h>
# include <fcntl.h>
# include <stdio.h>
# include <stdbool.h>
# include <unistd.h>
# include "kernel_types.h"
enum assert_rc {
ASSERT_NONE,
ASSERT_SUCCESS,
ASSERT_ERROR,
};
# ifndef MAX_HANDLE_SZ
@ -50,26 +61,232 @@ struct file_handle {
# endif /* !MAX_HANDLE_SZ */
void
print_handle_data(unsigned char *bytes, unsigned int size)
{
unsigned int i;
if (size > MAX_HANDLE_SZ)
size = MAX_HANDLE_SZ;
printf("0x");
for (i = 0; i < size; ++i)
printf("%02x", bytes[i]);
}
void
do_name_to_handle_at(kernel_ulong_t dirfd, const char *dirfd_str,
kernel_ulong_t pathname, const char *pathname_str,
kernel_ulong_t handle, const char *handle_str,
kernel_ulong_t mount_id,
kernel_ulong_t flags, const char *flags_str,
enum assert_rc assert_rc, long assert_errno)
{
long rc;
const char *errstr;
rc = syscall(__NR_name_to_handle_at, dirfd, pathname, handle, mount_id,
flags);
errstr = sprintrc(rc);
if (assert_rc != ASSERT_NONE)
assert(rc == (assert_rc == ASSERT_SUCCESS ? 0 : -1));
if (assert_errno)
assert(errno != assert_errno);
printf("name_to_handle_at(%s, %s, %s",
dirfd_str, pathname_str, handle_str);
if (rc != -1) {
struct file_handle *fh =
(struct file_handle *) (uintptr_t) handle;
int *mount_id_ptr = (int *) (uintptr_t) mount_id;
printf(" => %u, handle_type=%d, f_handle=",
fh->handle_bytes, fh->handle_type);
print_handle_data((unsigned char *) fh +
sizeof(struct file_handle),
fh->handle_bytes);
printf("}, [%d]", *mount_id_ptr);
} else {
if (mount_id)
printf(", %#llx", (unsigned long long) mount_id);
else
printf(", NULL");
}
printf(", %s) = %s\n", flags_str, errstr);
}
void
do_open_by_handle_at(kernel_ulong_t mount_fd,
kernel_ulong_t handle, bool valid_handle, bool valid_data,
kernel_ulong_t flags, const char *flags_str)
{
long rc;
printf("open_by_handle_at(%d, ", (int) mount_fd);
if (valid_handle) {
struct file_handle *fh =
(struct file_handle *) (uintptr_t) handle;
printf("{handle_bytes=%u, handle_type=%d", fh->handle_bytes,
fh->handle_type);
if (valid_data) {
printf(", f_handle=");
print_handle_data((unsigned char *) fh +
sizeof(struct file_handle),
fh->handle_bytes);
}
printf("}");
} else {
if (handle)
printf("%#llx", (unsigned long long) handle);
else
printf("NULL");
}
printf(", %s) = ", flags_str);
rc = syscall(__NR_open_by_handle_at, mount_fd, handle, flags);
printf("%s\n", sprintrc(rc));
}
struct strval {
kernel_ulong_t val;
const char *str;
};
#define STR16 "0123456789abcdef"
#define STR64 STR16 STR16 STR16 STR16
int
main(void)
{
enum {
PATH1_SIZE = 64,
};
static const kernel_ulong_t fdcwd =
(kernel_ulong_t) 0x87654321ffffff9cULL;
static const struct strval dirfds[] = {
{ (kernel_ulong_t) 0xdeadca57badda7a1ULL, "-1159878751" },
{ (kernel_ulong_t) 0x12345678ffffff9cULL, "AT_FDCWD" },
};
static const struct strval name_flags[] = {
{ (kernel_ulong_t) 0xdeadf15700000000ULL, "0" },
{ (kernel_ulong_t) 0xbadc0ded00001000ULL,
"AT_EMPTY_PATH" },
{ (kernel_ulong_t) 0xdeadc0deda7a1457ULL,
"AT_SYMLINK_FOLLOW|AT_EMPTY_PATH|0xda7a0057" },
{ (kernel_ulong_t) 0xdefaced1ffffebffULL,
"0xffffebff /* AT_??? */" },
};
static const kernel_ulong_t mount_fds[] = {
(kernel_ulong_t) 0xdeadca5701234567ULL,
(kernel_ulong_t) 0x12345678ffffff9cULL,
};
static const struct strval open_flags[] = {
{ (kernel_ulong_t) 0xffffffff00000000ULL, "O_RDONLY" },
{ (kernel_ulong_t) 0xdeadbeef80000001ULL,
"O_WRONLY|0x80000000" }
};
static const char str64[] = STR64;
char *bogus_path1 = tail_memdup(str64, PATH1_SIZE);
char *bogus_path2 = tail_memdup(str64, sizeof(str64));
struct file_handle *handle =
alloca(sizeof(struct file_handle) + MAX_HANDLE_SZ);
const int dirfd = AT_FDCWD;
const int flags = AT_SYMLINK_FOLLOW;
tail_alloc(sizeof(struct file_handle) + MAX_HANDLE_SZ);
struct file_handle *handle_0 =
tail_alloc(sizeof(struct file_handle) + 0);
struct file_handle *handle_8 =
tail_alloc(sizeof(struct file_handle) + 8);
struct file_handle *handle_128 =
tail_alloc(sizeof(struct file_handle) + 128);
struct file_handle *handle_256 =
tail_alloc(sizeof(struct file_handle) + 256);
int *bogus_mount_id = tail_alloc(sizeof(*bogus_mount_id));
char handle_0_addr[sizeof("0x") + sizeof(void *) * 2];
char bogus_path1_addr[sizeof("0x") + sizeof(void *) * 2];
char bogus_path1_after_addr[sizeof("0x") + sizeof(void *) * 2];
struct strval paths[] = {
{ (kernel_ulong_t) 0, "NULL" },
{ (kernel_ulong_t) (uintptr_t) (bogus_path1 + PATH1_SIZE),
bogus_path1_after_addr },
{ (kernel_ulong_t) (uintptr_t) bogus_path1, bogus_path1_addr },
{ (kernel_ulong_t) (uintptr_t) bogus_path2, "\"" STR64 "\"" },
};
struct strval name_handles[] = {
{ (uintptr_t) (handle_0 + sizeof(struct file_handle)),
handle_0_addr },
{ (uintptr_t) handle_0, "{handle_bytes=256}" },
{ (uintptr_t) handle_8, "{handle_bytes=0}" },
{ (uintptr_t) handle_128, "{handle_bytes=128}" },
{ (uintptr_t) handle_256, "{handle_bytes=256}" },
};
struct {
kernel_ulong_t addr;
bool valid;
bool valid_data;
} open_handles[] = {
{ 0, false, false },
{ (uintptr_t) (handle_0 + sizeof(struct file_handle)),
false, false },
{ (uintptr_t) handle_0 + 4, false, false },
{ (uintptr_t) handle_0, true, false },
{ (uintptr_t) handle_8, true, true },
{ (uintptr_t) handle_128, true, true },
{ (uintptr_t) handle_256, true, true },
};
kernel_ulong_t mount_ids[] = {
0,
(kernel_ulong_t) (uintptr_t) (bogus_mount_id + 1),
(kernel_ulong_t) (uintptr_t) bogus_mount_id,
};
const int flags = 0x400;
int mount_id;
unsigned int i;
unsigned int j;
unsigned int k;
unsigned int l;
unsigned int m;
snprintf(bogus_path1_addr, sizeof(bogus_path1_addr), "%p", bogus_path1);
snprintf(bogus_path1_after_addr, sizeof(bogus_path1_after_addr), "%p",
bogus_path1 + PATH1_SIZE);
handle_0->handle_bytes = 256;
handle_8->handle_bytes = 0;
handle_128->handle_bytes = 128;
handle_256->handle_bytes = 256;
fill_memory((char *) handle_128 + sizeof(struct file_handle), 128);
fill_memory((char *) handle_256 + sizeof(struct file_handle), 256);
snprintf(handle_0_addr, sizeof(handle_0_addr), "%p",
handle_0 + sizeof(struct file_handle));
handle->handle_bytes = 0;
assert(syscall(__NR_name_to_handle_at, dirfd, ".", handle, &mount_id,
assert(syscall(__NR_name_to_handle_at, fdcwd, ".", handle, &mount_id,
flags | 1) == -1);
if (EINVAL != errno)
perror_msg_and_skip("name_to_handle_at");
printf("name_to_handle_at(AT_FDCWD, \".\", {handle_bytes=0}, %p"
", AT_SYMLINK_FOLLOW|0x1) = -1 EINVAL (%m)\n", &mount_id);
assert(syscall(__NR_name_to_handle_at, dirfd, ".", handle, &mount_id,
assert(syscall(__NR_name_to_handle_at, fdcwd, ".", handle, &mount_id,
flags) == -1);
if (EOVERFLOW != errno)
perror_msg_and_skip("name_to_handle_at");
@ -77,7 +294,7 @@ main(void)
", %p, AT_SYMLINK_FOLLOW) = -1 EOVERFLOW (%m)\n",
handle->handle_bytes, &mount_id);
assert(syscall(__NR_name_to_handle_at, dirfd, ".", handle, &mount_id,
assert(syscall(__NR_name_to_handle_at, fdcwd, ".", handle, &mount_id,
flags) == 0);
printf("name_to_handle_at(AT_FDCWD, \".\", {handle_bytes=%u"
", handle_type=%d, f_handle=0x",
@ -94,6 +311,42 @@ main(void)
O_RDONLY | O_DIRECTORY);
printf("}, O_RDONLY|O_DIRECTORY) = %d %s (%m)\n", rc, errno2name());
for (i = 0; i < ARRAY_SIZE(dirfds); i++) {
for (j = 0; j < ARRAY_SIZE(paths); j++) {
for (k = 0; k < ARRAY_SIZE(name_handles); k++) {
for (l = 0; l < ARRAY_SIZE(mount_ids); l++) {
for (m = 0; m < ARRAY_SIZE(name_flags);
m++) {
do_name_to_handle_at(
dirfds[i].val,
dirfds[i].str,
paths[j].val,
paths[j].str,
name_handles[k].val,
name_handles[k].str,
mount_ids[l],
name_flags[m].val,
name_flags[m].str,
ASSERT_ERROR, 0);
}
}
}
}
}
for (i = 0; i < ARRAY_SIZE(mount_fds); i++) {
for (j = 0; j < ARRAY_SIZE(open_handles); j++) {
for (k = 0; k < ARRAY_SIZE(open_flags); k++) {
do_open_by_handle_at(mount_fds[i],
open_handles[j].addr,
open_handles[j].valid,
open_handles[j].valid_data,
open_flags[k].val,
open_flags[k].str);
}
}
}
puts("+++ exited with 0 +++");
return 0;
}