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linux-user: syscall: ioctls: support DRM_IOCTL_VERSION

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Another DRM_IOCTL_* commands will be done later.

Signed-off-by: Chen Gang <chengang@emindsoft.com.cn>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20200605013221.22828-1-chengang@emindsoft.com.cn>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Chen Gang 2020-06-05 09:32:21 +08:00 • committed by Laurent Vivier
parent d43624c400
commit e865b97ff4
5 changed files with 139 additions and 0 deletions
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98
linux-user/syscall.c
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@ -112,6 +112,9 @@
#include <linux/if_alg.h>
#include <linux/rtc.h>
#include <sound/asound.h>
#ifdef HAVE_DRM_H
#include <libdrm/drm.h>
#endif
#include "linux_loop.h"
#include "uname.h"
@ -5276,6 +5279,101 @@ static abi_long do_ioctl_tiocgptpeer(const IOCTLEntry *ie, uint8_t *buf_temp,
}
#endif
#ifdef HAVE_DRM_H
static void unlock_drm_version(struct drm_version *host_ver,
struct target_drm_version *target_ver,
bool copy)
{
unlock_user(host_ver->name, target_ver->name,
copy ? host_ver->name_len : 0);
unlock_user(host_ver->date, target_ver->date,
copy ? host_ver->date_len : 0);
unlock_user(host_ver->desc, target_ver->desc,
copy ? host_ver->desc_len : 0);
}
static inline abi_long target_to_host_drmversion(struct drm_version *host_ver,
struct target_drm_version *target_ver)
{
memset(host_ver, 0, sizeof(*host_ver));
__get_user(host_ver->name_len, &target_ver->name_len);
if (host_ver->name_len) {
host_ver->name = lock_user(VERIFY_WRITE, target_ver->name,
target_ver->name_len, 0);
if (!host_ver->name) {
return -EFAULT;
}
}
__get_user(host_ver->date_len, &target_ver->date_len);
if (host_ver->date_len) {
host_ver->date = lock_user(VERIFY_WRITE, target_ver->date,
target_ver->date_len, 0);
if (!host_ver->date) {
goto err;
}
}
__get_user(host_ver->desc_len, &target_ver->desc_len);
if (host_ver->desc_len) {
host_ver->desc = lock_user(VERIFY_WRITE, target_ver->desc,
target_ver->desc_len, 0);
if (!host_ver->desc) {
goto err;
}
}
return 0;
err:
unlock_drm_version(host_ver, target_ver, false);
return -EFAULT;
}
static inline void host_to_target_drmversion(
struct target_drm_version *target_ver,
struct drm_version *host_ver)
{
__put_user(host_ver->version_major, &target_ver->version_major);
__put_user(host_ver->version_minor, &target_ver->version_minor);
__put_user(host_ver->version_patchlevel, &target_ver->version_patchlevel);
__put_user(host_ver->name_len, &target_ver->name_len);
__put_user(host_ver->date_len, &target_ver->date_len);
__put_user(host_ver->desc_len, &target_ver->desc_len);
unlock_drm_version(host_ver, target_ver, true);
}
static abi_long do_ioctl_drm(const IOCTLEntry *ie, uint8_t *buf_temp,
int fd, int cmd, abi_long arg)
{
struct drm_version *ver;
struct target_drm_version *target_ver;
abi_long ret;
switch (ie->host_cmd) {
case DRM_IOCTL_VERSION:
if (!lock_user_struct(VERIFY_WRITE, target_ver, arg, 0)) {
return -TARGET_EFAULT;
}
ver = (struct drm_version *)buf_temp;
ret = target_to_host_drmversion(ver, target_ver);
if (!is_error(ret)) {
ret = get_errno(safe_ioctl(fd, ie->host_cmd, ver));
if (is_error(ret)) {
unlock_drm_version(ver, target_ver, false);
} else {
host_to_target_drmversion(target_ver, ver);
}
}
unlock_user_struct(target_ver, arg, 0);
return ret;
}
return -TARGET_ENOSYS;
}
#endif
static IOCTLEntry ioctl_entries[] = {
#define IOCTL(cmd, access, ...) \
{ TARGET_ ## cmd, cmd, #cmd, access, 0, { __VA_ARGS__ } },