PVRSRV_ERROR OSSecureExport(CONNECTION_DATA *psConnection,
IMG_PVOID pvData,
IMG_SECURE_TYPE *phSecure,
CONNECTION_DATA **ppsSecureConnection)
{
ENV_CONNECTION_DATA *psEnvConnection;
CONNECTION_DATA *psSecureConnection;
struct file *connection_file;
struct file *secure_file;
struct dentry *secure_dentry;
struct vfsmount *secure_mnt;
int secure_fd;
IMG_BOOL bPmrUnlocked = IMG_FALSE;
PVRSRV_ERROR eError;
/* Obtain the current connections struct file */
psEnvConnection = PVRSRVConnectionPrivateData(psConnection);
connection_file = LinuxFileFromEnvConnection(psEnvConnection);
/* Allocate a fd number */
secure_fd = get_unused_fd();
if (secure_fd < 0)
{
eError = PVRSRV_ERROR_OUT_OF_MEMORY;
goto e0;
}
/*
Get a reference to the dentry so when close is called we don't
drop the last reference too early and delete the file
*/
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0))
secure_dentry = dget(connection_file->f_path.dentry);
secure_mnt = mntget(connection_file->f_path.mnt);
#else
secure_dentry = dget(connection_file->f_dentry);
secure_mnt = mntget(connection_file->f_vfsmnt);
#endif
/* PMR lock needs to be released before bridge lock to keep lock hierarchy
* and avoid deadlock situation.
* OSSecureExport() can be called from functions that are not acquiring
* PMR lock (e.g. by PVRSRVSyncPrimServerSecureExportKM()) so we have to
* check if PMR lock is locked. */
if (PMRIsLockedByMe())
{
PMRUnlock();
bPmrUnlocked = IMG_TRUE;
}
OSReleaseBridgeLock();
/* Open our device (using the file information from our current connection) */
secure_file = dentry_open(
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
&connection_file->f_path,
#else
connection_file->f_dentry,
connection_file->f_vfsmnt,
#endif
connection_file->f_flags,
current_cred());
OSAcquireBridgeLock();
if (bPmrUnlocked)
PMRLock();
/* Bail if the open failed */
if (IS_ERR(secure_file))
{
put_unused_fd(secure_fd);
eError = PVRSRV_ERROR_OUT_OF_MEMORY;
goto e0;
}
/* Bind our struct file with it's fd number */
fd_install(secure_fd, secure_file);
/* Return the new services connection our secure data created */
#if defined(SUPPORT_DRM)
psSecureConnection = LinuxConnectionFromFile(PVR_DRM_FILE_FROM_FILE(secure_file));
#else
psSecureConnection = LinuxConnectionFromFile(secure_file);
#endif
/* Save the private data */
PVR_ASSERT(psSecureConnection->hSecureData == IMG_NULL);
psSecureConnection->hSecureData = pvData;
*phSecure = secure_fd;
*ppsSecureConnection = psSecureConnection;
return PVRSRV_OK;
e0:
PVR_ASSERT(eError != PVRSRV_OK);
return eError;
}
PVRSRV_ERROR OSSecureExport(CONNECTION_DATA *psConnection,
IMG_PVOID pvData,
IMG_SECURE_TYPE *phSecure,
CONNECTION_DATA **ppsSecureConnection)
{
ENV_CONNECTION_DATA *psEnvConnection;
CONNECTION_DATA *psSecureConnection;
struct file *connection_file;
struct file *secure_file;
struct dentry *secure_dentry;
struct vfsmount *secure_mnt;
int secure_fd;
PVRSRV_ERROR eError;
/* Obtain the current connections struct file */
psEnvConnection = PVRSRVConnectionPrivateData(psConnection);
connection_file = LinuxFileFromEnvConnection(psEnvConnection);
/* Allocate a fd number */
secure_fd = get_unused_fd();
if (secure_fd < 0)
{
eError = PVRSRV_ERROR_OUT_OF_MEMORY;
goto e0;
}
/*
Get a reference to the dentry so when close is called we don't
drop the last reference too early and delete the file
*/
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0))
secure_dentry = dget(connection_file->f_path.dentry);
secure_mnt = mntget(connection_file->f_path.mnt);
#else
secure_dentry = dget(connection_file->f_dentry);
secure_mnt = mntget(connection_file->f_vfsmnt);
#endif
mutex_unlock(&gPVRSRVLock);
/* Open our device (using the file information from our current connection) */
secure_file = dentry_open(
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
&connection_file->f_path,
#else
connection_file->f_dentry,
connection_file->f_vfsmnt,
#endif
connection_file->f_flags,
current_cred());
mutex_lock(&gPVRSRVLock);
/* Bail if the open failed */
if (IS_ERR(secure_file))
{
put_unused_fd(secure_fd);
eError = PVRSRV_ERROR_OUT_OF_MEMORY;
goto e0;
}
/* Bind our struct file with it's fd number */
fd_install(secure_fd, secure_file);
/* Return the new services connection our secure data created */
#if defined(SUPPORT_DRM)
psSecureConnection = LinuxConnectionFromFile(PVR_DRM_FILE_FROM_FILE(secure_file));
#else
psSecureConnection = LinuxConnectionFromFile(secure_file);
#endif
/* Save the private data */
PVR_ASSERT(psSecureConnection->hSecureData == IMG_NULL);
psSecureConnection->hSecureData = pvData;
*phSecure = secure_fd;
*ppsSecureConnection = psSecureConnection;
return PVRSRV_OK;
e0:
PVR_ASSERT(eError != PVRSRV_OK);
return eError;
}
