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linux-user: fix to handle variably sized SIOCGSTAMP with new kernels

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The SIOCGSTAMP symbol was previously defined in the
asm-generic/sockios.h header file. QEMU sees that header
indirectly via sys/socket.h

In linux kernel commit 0768e17073dc527ccd18ed5f96ce85f9985e9115
the asm-generic/sockios.h header no longer defines SIOCGSTAMP.
Instead it provides only SIOCGSTAMP_OLD, which only uses a
32-bit time_t on 32-bit architectures.

The linux/sockios.h header then defines SIOCGSTAMP using
either SIOCGSTAMP_OLD or SIOCGSTAMP_NEW as appropriate. If
SIOCGSTAMP_NEW is used, then the tv_sec field is 64-bit even
on 32-bit architectures

To cope with this we must now convert the old and new type from
the target to the host one.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Message-Id: <20190718130641.15294-1-laurent@vivier.eu>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Daniel P. Berrangé 2019-07-18 15:06:41 +02:00 • committed by Laurent Vivier
parent 0acd4ab849
commit 6d5d5dde9a
4 changed files with 159 additions and 38 deletions
Download patch file Download diff file Expand all files Collapse all files

140
linux-user/syscall.c
View file

@ -37,6 +37,7 @@
#include <sched.h>
#include <sys/timex.h>
#include <sys/socket.h>
#include <linux/sockios.h>
#include <sys/un.h>
#include <sys/uio.h>
#include <poll.h>
@ -1126,8 +1127,9 @@ static inline abi_long copy_from_user_timeval(struct timeval *tv,
{
struct target_timeval *target_tv;
if (!lock_user_struct(VERIFY_READ, target_tv, target_tv_addr, 1))
if (!lock_user_struct(VERIFY_READ, target_tv, target_tv_addr, 1)) {
return -TARGET_EFAULT;
}
__get_user(tv->tv_sec, &target_tv->tv_sec);
__get_user(tv->tv_usec, &target_tv->tv_usec);
@ -1142,8 +1144,9 @@ static inline abi_long copy_to_user_timeval(abi_ulong target_tv_addr,
{
struct target_timeval *target_tv;
if (!lock_user_struct(VERIFY_WRITE, target_tv, target_tv_addr, 0))
if (!lock_user_struct(VERIFY_WRITE, target_tv, target_tv_addr, 0)) {
return -TARGET_EFAULT;
}
__put_user(tv->tv_sec, &target_tv->tv_sec);
__put_user(tv->tv_usec, &target_tv->tv_usec);
@ -1153,6 +1156,65 @@ static inline abi_long copy_to_user_timeval(abi_ulong target_tv_addr,
return 0;
}
static inline abi_long copy_to_user_timeval64(abi_ulong target_tv_addr,
const struct timeval *tv)
{
struct target__kernel_sock_timeval *target_tv;
if (!lock_user_struct(VERIFY_WRITE, target_tv, target_tv_addr, 0)) {
return -TARGET_EFAULT;
}
__put_user(tv->tv_sec, &target_tv->tv_sec);
__put_user(tv->tv_usec, &target_tv->tv_usec);
unlock_user_struct(target_tv, target_tv_addr, 1);
return 0;
}
static inline abi_long target_to_host_timespec(struct timespec *host_ts,
abi_ulong target_addr)
{
struct target_timespec *target_ts;
if (!lock_user_struct(VERIFY_READ, target_ts, target_addr, 1)) {
return -TARGET_EFAULT;
}
__get_user(host_ts->tv_sec, &target_ts->tv_sec);
__get_user(host_ts->tv_nsec, &target_ts->tv_nsec);
unlock_user_struct(target_ts, target_addr, 0);
return 0;
}
static inline abi_long host_to_target_timespec(abi_ulong target_addr,
struct timespec *host_ts)
{
struct target_timespec *target_ts;
if (!lock_user_struct(VERIFY_WRITE, target_ts, target_addr, 0)) {
return -TARGET_EFAULT;
}
__put_user(host_ts->tv_sec, &target_ts->tv_sec);
__put_user(host_ts->tv_nsec, &target_ts->tv_nsec);
unlock_user_struct(target_ts, target_addr, 1);
return 0;
}
static inline abi_long host_to_target_timespec64(abi_ulong target_addr,
struct timespec *host_ts)
{
struct target__kernel_timespec *target_ts;
if (!lock_user_struct(VERIFY_WRITE, target_ts, target_addr, 0)) {
return -TARGET_EFAULT;
}
__put_user(host_ts->tv_sec, &target_ts->tv_sec);
__put_user(host_ts->tv_nsec, &target_ts->tv_nsec);
unlock_user_struct(target_ts, target_addr, 1);
return 0;
}
static inline abi_long copy_from_user_timezone(struct timezone *tz,
abi_ulong target_tz_addr)
{
@ -4899,6 +4961,54 @@ static abi_long do_ioctl_kdsigaccept(const IOCTLEntry *ie, uint8_t *buf_temp,
return get_errno(safe_ioctl(fd, ie->host_cmd, sig));
}
static abi_long do_ioctl_SIOCGSTAMP(const IOCTLEntry *ie, uint8_t *buf_temp,
int fd, int cmd, abi_long arg)
{
struct timeval tv;
abi_long ret;
ret = get_errno(safe_ioctl(fd, SIOCGSTAMP, &tv));
if (is_error(ret)) {
return ret;
}
if (cmd == (int)TARGET_SIOCGSTAMP_OLD) {
if (copy_to_user_timeval(arg, &tv)) {
return -TARGET_EFAULT;
}
} else {
if (copy_to_user_timeval64(arg, &tv)) {
return -TARGET_EFAULT;
}
}
return ret;
}
static abi_long do_ioctl_SIOCGSTAMPNS(const IOCTLEntry *ie, uint8_t *buf_temp,
int fd, int cmd, abi_long arg)
{
struct timespec ts;
abi_long ret;
ret = get_errno(safe_ioctl(fd, SIOCGSTAMPNS, &ts));
if (is_error(ret)) {
return ret;
}
if (cmd == (int)TARGET_SIOCGSTAMPNS_OLD) {
if (host_to_target_timespec(arg, &ts)) {
return -TARGET_EFAULT;
}
} else{
if (host_to_target_timespec64(arg, &ts)) {
return -TARGET_EFAULT;
}
}
return ret;
}
#ifdef TIOCGPTPEER
static abi_long do_ioctl_tiocgptpeer(const IOCTLEntry *ie, uint8_t *buf_temp,
int fd, int cmd, abi_long arg)
@ -6271,32 +6381,6 @@ static inline abi_long target_ftruncate64(void *cpu_env, abi_long arg1,
}
#endif
static inline abi_long target_to_host_timespec(struct timespec *host_ts,
abi_ulong target_addr)
{
struct target_timespec *target_ts;
if (!lock_user_struct(VERIFY_READ, target_ts, target_addr, 1))
return -TARGET_EFAULT;
__get_user(host_ts->tv_sec, &target_ts->tv_sec);
__get_user(host_ts->tv_nsec, &target_ts->tv_nsec);
unlock_user_struct(target_ts, target_addr, 0);
return 0;
}
static inline abi_long host_to_target_timespec(abi_ulong target_addr,
struct timespec *host_ts)
{
struct target_timespec *target_ts;
if (!lock_user_struct(VERIFY_WRITE, target_ts, target_addr, 0))
return -TARGET_EFAULT;
__put_user(host_ts->tv_sec, &target_ts->tv_sec);
__put_user(host_ts->tv_nsec, &target_ts->tv_nsec);
unlock_user_struct(target_ts, target_addr, 1);
return 0;
}
static inline abi_long target_to_host_itimerspec(struct itimerspec *host_itspec,
abi_ulong target_addr)
{