/*
* Expects va args : (int elem_num, const char __user *s)
* Element size is implicit (sizeof(char)).
*/
static char *ltt_serialize_fs_data(char *buffer, char *str,
struct ltt_serialize_closure *closure,
void *serialize_private,
int align, const char *fmt, va_list *args)
{
int elem_size;
int elem_num;
const char __user *s;
unsigned long noncopy;
elem_num = va_arg(*args, int);
s = va_arg(*args, const char __user *);
elem_size = sizeof(*s);
if (align)
str += ltt_align((long)str, sizeof(int));
if (buffer)
*(int*)str = elem_num;
str += sizeof(int);
if (elem_num > 0) {
/* No alignment required for char */
if (buffer) {
noncopy = __copy_from_user_inatomic(str, s,
elem_num*elem_size);
memset(str+(elem_num*elem_size)-noncopy, 0, noncopy);
}
str += (elem_num*elem_size);
}
/* Following alignment for genevent compatibility */
if (align)
str += ltt_align((long)str, sizeof(void*));
return str;
}
size_t ltt_write_event_header_slow(struct ltt_chanbuf_alloc *bufa,
struct ltt_chan_alloc *chana,
long buf_offset, u16 eID, u32 event_size,
u64 tsc, unsigned int rflags)
{
struct ltt_event_header header;
u16 small_size;
switch (rflags) {
case LTT_RFLAG_ID_SIZE_TSC:
header.id_time = 29 << LTT_TSC_BITS;
break;
case LTT_RFLAG_ID_SIZE:
header.id_time = 30 << LTT_TSC_BITS;
break;
case LTT_RFLAG_ID:
header.id_time = 31 << LTT_TSC_BITS;
break;
default:
WARN_ON_ONCE(1);
header.id_time = 0;
}
header.id_time |= (u32)tsc & LTT_TSC_MASK;
ltt_relay_write(bufa, chana, buf_offset, &header, sizeof(header));
buf_offset += sizeof(header);
switch (rflags) {
case LTT_RFLAG_ID_SIZE_TSC:
small_size = (u16)min_t(u32, event_size, LTT_MAX_SMALL_SIZE);
ltt_relay_write(bufa, chana, buf_offset,
&eID, sizeof(u16));
buf_offset += sizeof(u16);
ltt_relay_write(bufa, chana, buf_offset,
&small_size, sizeof(u16));
buf_offset += sizeof(u16);
if (small_size == LTT_MAX_SMALL_SIZE) {
ltt_relay_write(bufa, chana, buf_offset,
&event_size, sizeof(u32));
buf_offset += sizeof(u32);
}
buf_offset += ltt_align(buf_offset, sizeof(u64));
ltt_relay_write(bufa, chana, buf_offset,
&tsc, sizeof(u64));
buf_offset += sizeof(u64);
break;
case LTT_RFLAG_ID_SIZE:
small_size = (u16)min_t(u32, event_size, LTT_MAX_SMALL_SIZE);
ltt_relay_write(bufa, chana, buf_offset,
&eID, sizeof(u16));
buf_offset += sizeof(u16);
ltt_relay_write(bufa, chana, buf_offset,
&small_size, sizeof(u16));
buf_offset += sizeof(u16);
if (small_size == LTT_MAX_SMALL_SIZE) {
ltt_relay_write(bufa, chana, buf_offset,
&event_size, sizeof(u32));
buf_offset += sizeof(u32);
}
break;
case LTT_RFLAG_ID:
ltt_relay_write(bufa, chana, buf_offset,
&eID, sizeof(u16));
buf_offset += sizeof(u16);
break;
}
return buf_offset;
}