static int blk_log_dump_pdu(struct trace_seq *s, const struct trace_entry *ent)
{
const unsigned char *pdu_buf;
int pdu_len;
int i, end, ret;
pdu_buf = pdu_start(ent);
pdu_len = te_blk_io_trace(ent)->pdu_len;
if (!pdu_len)
return 1;
for (end = pdu_len - 1; end >= 0; end--)
if (pdu_buf[end])
break;
end++;
if (!trace_seq_putc(s, '('))
return 0;
for (i = 0; i < pdu_len; i++) {
ret = trace_seq_printf(s, "%s%02x",
i == 0 ? "" : " ", pdu_buf[i]);
if (!ret)
return ret;
if (i == end && end != pdu_len - 1)
return trace_seq_puts(s, " ..) ");
}
return trace_seq_puts(s, ") ");
}
static enum print_line_t print_one_line(struct trace_iterator *iter,
bool classic)
{
struct trace_seq *s = &iter->seq;
const struct blk_io_trace *t;
u16 what;
int ret;
bool long_act;
blk_log_action_t *log_action;
t = te_blk_io_trace(iter->ent);
what = t->action & ((1 << BLK_TC_SHIFT) - 1);
long_act = !!(trace_flags & TRACE_ITER_VERBOSE);
log_action = classic ? &blk_log_action_classic : &blk_log_action;
if (t->action == BLK_TN_MESSAGE) {
ret = log_action(iter, long_act ? "message" : "m");
if (ret)
ret = blk_log_msg(s, iter->ent);
goto out;
}
if (unlikely(what == 0 || what >= ARRAY_SIZE(what2act)))
ret = trace_seq_printf(s, "Unknown action %x\n", what);
else {
ret = log_action(iter, what2act[what].act[long_act]);
if (ret)
ret = what2act[what].print(s, iter->ent);
}
out:
return ret ? TRACE_TYPE_HANDLED : TRACE_TYPE_PARTIAL_LINE;
}
static int blk_log_action(struct trace_iterator *iter, const char *act)
{
char rwbs[RWBS_LEN];
const struct blk_io_trace *t = te_blk_io_trace(iter->ent);
fill_rwbs(rwbs, t);
return trace_seq_printf(&iter->seq, "%3d,%-3d %2s %3s ",
MAJOR(t->device), MINOR(t->device), act, rwbs);
}
static int blk_log_msg(struct trace_seq *s, const struct trace_entry *ent)
{
int ret;
const struct blk_io_trace *t = te_blk_io_trace(ent);
ret = trace_seq_putmem(s, t + 1, t->pdu_len);
if (ret)
return trace_seq_putc(s, '\n');
return ret;
}
static int blk_log_action_classic(struct trace_iterator *iter, const char *act)
{
char rwbs[RWBS_LEN];
unsigned long long ts = iter->ts;
unsigned long nsec_rem = do_div(ts, NSEC_PER_SEC);
unsigned secs = (unsigned long)ts;
const struct blk_io_trace *t = te_blk_io_trace(iter->ent);
fill_rwbs(rwbs, t);
return trace_seq_printf(&iter->seq,
"%3d,%-3d %2d %5d.%09lu %5u %2s %3s ",
MAJOR(t->device), MINOR(t->device), iter->cpu,
secs, nsec_rem, iter->ent->pid, act, rwbs);
}
static int blk_log_dump_pdu(struct trace_seq *s, const struct trace_entry *ent)
{
const unsigned char *pdu_buf;
int pdu_len;
int i, end, ret;
pdu_buf = pdu_start(ent);
pdu_len = te_blk_io_trace(ent)->pdu_len;
if (!pdu_len)
return 1;
/* find the last zero that needs to be printed */
for (end = pdu_len - 1; end >= 0; end--)
if (pdu_buf[end])
break;
end++;
if (!trace_seq_putc(s, '('))
return 0;
for (i = 0; i < pdu_len; i++) {
ret = trace_seq_printf(s, "%s%02x",
i == 0 ? "" : " ", pdu_buf[i]);
if (!ret)
return ret;
/*
* stop when the rest is just zeroes and indicate so
* with a ".." appended
*/
if (i == end && end != pdu_len - 1)
return trace_seq_puts(s, " ..) ");
}
return trace_seq_puts(s, ") ");
}
static inline __u16 t_error(const struct trace_entry *ent)
{
return te_blk_io_trace(ent)->error;
}
static inline unsigned long long t_sector(const struct trace_entry *ent)
{
return te_blk_io_trace(ent)->sector;
}
static inline u32 t_bytes(const struct trace_entry *ent)
{
return te_blk_io_trace(ent)->bytes;
}
static inline u32 t_action(const struct trace_entry *ent)
{
return te_blk_io_trace(ent)->action;
}
static inline const void *pdu_start(const struct trace_entry *ent)
{
return te_blk_io_trace(ent) + 1;
}
