/*
* Handle incoming FCP command.
*/
static void ft_recv_cmd(struct ft_sess *sess, struct fc_frame *fp)
{
struct ft_cmd *cmd;
struct fc_lport *lport = sess->tport->lport;
struct se_session *se_sess = sess->se_sess;
int tag;
tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
if (tag < 0)
goto busy;
cmd = &((struct ft_cmd *)se_sess->sess_cmd_map)[tag];
memset(cmd, 0, sizeof(struct ft_cmd));
cmd->se_cmd.map_tag = tag;
cmd->sess = sess;
cmd->seq = lport->tt.seq_assign(lport, fp);
if (!cmd->seq) {
percpu_ida_free(&se_sess->sess_tag_pool, tag);
goto busy;
}
cmd->req_frame = fp; /* hold frame during cmd */
INIT_WORK(&cmd->work, ft_send_work);
queue_work(sess->tport->tpg->workqueue, &cmd->work);
return;
busy:
pr_debug("cmd or seq allocation failure - sending BUSY\n");
ft_send_resp_status(lport, fp, SAM_STAT_BUSY, 0);
fc_frame_free(fp);
ft_sess_put(sess); /* undo get from lookup */
}
static void __blk_mq_put_reserved_tag(struct blk_mq_tags *tags,
unsigned int tag)
{
BUG_ON(tag >= tags->nr_reserved_tags);
percpu_ida_free(&tags->reserved_tags, tag);
}
static void ft_free_cmd(struct ft_cmd *cmd)
{
struct fc_frame *fp;
struct fc_lport *lport;
struct ft_sess *sess;
if (!cmd)
return;
sess = cmd->sess;
fp = cmd->req_frame;
lport = fr_dev(fp);
if (fr_seq(fp))
lport->tt.seq_release(fr_seq(fp));
fc_frame_free(fp);
percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
ft_sess_put(sess); /* undo get from lookup at recv */
}
