__attribute__((noinline)) void
fn0 (void)
{
pthread_cleanup_push (clh, (void *) 1l);
fn_read ();
pthread_cleanup_pop (1);
}
/****************************************************************************
*
* fn_getc
*
* get a character from file
*
* INPUTS
*
* filehandle - file where to read from
*
* RETURNS
*
* with the read character or -1 if read was not successfully
*
***************************************************************************/
int fn_getc ( F_FILE * filehandle )
{
unsigned char ch;
if ( !fn_read( &ch, 1, 1, filehandle ) )
{
return -1;
}
return (int)ch;
}
static int fn(void *d)
{
struct l4fdx_client *client = d;
int err;
err = sys_setregid(client->gid, client->gid);
err = sys_setreuid(client->uid, client->uid);
err = sys_setsid();
if (client->capname)
snprintf(current->comm, sizeof(current->comm),
"l4xfdx-%s", client->capname);
else
snprintf(current->comm, sizeof(current->comm),
"l4xfdx-%lx", client->cap >> L4_CAP_SHIFT);
current->comm[sizeof(current->comm) - 1] = 0;
set_user_nice(current, -20);
while (!should_stop || !list_empty(&client->req_list)) {
struct internal_request *r;
wait_event_interruptible(client->event,
!list_empty(&client->req_list)
|| should_stop);
r = pop_request(client->srv_obj);
switch (r->type) {
case L4FS_REQ_OPEN:
fn_open(client->srv_obj, r);
break;
case L4FS_REQ_READ:
fn_read(client->srv_obj, r);
break;
case L4FS_REQ_WRITE:
fn_write(client->srv_obj, r);
break;
case L4FS_REQ_CLOSE:
fn_close(client->srv_obj, r);
break;
case L4FS_REQ_FSTAT64:
fn_fstat64(client->srv_obj, r);
break;
default:
pr_err("l4fdx: Invalid type=%d\n", r->type);
break;
}
}
return 0;
}
/*
** fr_read
**
** Read from a file.
**
** INPUT : buf - buffer to read data
** size - number of unique
** size_st - size of unique
** *filehandle - pointer to file descriptor
** OUTPUT: number of read bytes
*/
long fr_read ( void * bbuf, long size, long size_st, F_FILE * filehandle )
{
long rc;
if( xSemaphoreTake( fs_lock_semaphore, F_MAX_LOCK_WAIT_TICKS ) == pdPASS )
{
rc = fn_read( bbuf, size, size_st, filehandle );
xSemaphoreGive( fs_lock_semaphore );
}
else
{
rc = 0;
}
return rc;
}
