static void tipc_printbuf_move(struct print_buf *pb_to,
struct print_buf *pb_from)
{
int len;
/* Handle the cases where contents can't be moved */
if (!pb_to->buf)
return;
if (!pb_from->buf) {
tipc_printbuf_reset(pb_to);
return;
}
if (pb_to->size < pb_from->size) {
strcpy(pb_to->buf, "*** PRINT BUFFER MOVE ERROR ***");
pb_to->buf[pb_to->size - 1] = ~0;
pb_to->crs = strchr(pb_to->buf, 0);
return;
}
/* Copy data from char after cursor to end (if used) */
len = pb_from->buf + pb_from->size - pb_from->crs - 2;
if ((pb_from->buf[pb_from->size - 1] == 0) && (len > 0)) {
strcpy(pb_to->buf, pb_from->crs + 1);
pb_to->crs = pb_to->buf + len;
} else
pb_to->crs = pb_to->buf;
/* Copy data from start to cursor (always) */
len = pb_from->crs - pb_from->buf;
strcpy(pb_to->crs, pb_from->buf);
pb_to->crs += len;
tipc_printbuf_reset(pb_from);
}
void tipc_dump_dbg(struct print_buf *pb, const char *fmt, ...)
{
int len;
if (pb == TIPC_CONS)
return;
spin_lock_bh(&print_lock);
FORMAT(print_string, len, fmt);
printk(print_string);
printk("\n---- Start of %s log dump ----\n\n",
(pb == TIPC_LOG) ? "global" : "local");
printbuf_dump(pb);
tipc_printbuf_reset(pb);
printk("\n---- End of dump ----\n");
spin_unlock_bh(&print_lock);
}
void tipc_dump(struct print_buf *pb, const char *fmt, ...)
{
struct print_buf *pb_next;
int len;
spin_lock_bh(&print_lock);
FORMAT(print_string, len, fmt);
printk(print_string);
for (; pb; pb = pb->next) {
if (pb != TIPC_CONS) {
printk("\n---- Start of %s log dump ----\n\n",
(pb == TIPC_LOG) ? "global" : "local");
printbuf_dump(pb);
tipc_printbuf_reset(pb);
printk("\n---- End of dump ----\n");
}
pb_next = pb->next;
pb->next = NULL;
pb = pb_next;
}
spin_unlock_bh(&print_lock);
}
int tipc_printbuf_validate(struct print_buf *pb)
{
char *err = "\n\n*** PRINT BUFFER OVERFLOW ***\n\n";
char *cp_buf;
struct print_buf cb;
if (!pb->buf)
return 0;
if (pb->buf[pb->size - 1] == 0) {
cp_buf = kmalloc(pb->size, GFP_ATOMIC);
if (cp_buf) {
tipc_printbuf_init(&cb, cp_buf, pb->size);
tipc_printbuf_move(&cb, pb);
tipc_printbuf_move(pb, &cb);
kfree(cp_buf);
memcpy(pb->buf, err, strlen(err));
} else {
tipc_printbuf_reset(pb);
tipc_printf(pb, err);
}
}
return (pb->crs - pb->buf + 1);
}
