/*
* 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 unsigned int __blk_mq_get_tag(struct blk_mq_tags *tags, gfp_t gfp)
{
int tag;
tag = percpu_ida_alloc(&tags->free_tags, gfp);
if (tag < 0)
return BLK_MQ_TAG_FAIL;
return tag + tags->nr_reserved_tags;
}
static unsigned int __blk_mq_get_tag(struct blk_mq_tags *tags, gfp_t gfp)
{
int tag;
tag = percpu_ida_alloc(&tags->free_tags, (gfp & __GFP_WAIT) ?
TASK_UNINTERRUPTIBLE : TASK_RUNNING);
if (tag < 0)
return BLK_MQ_TAG_FAIL;
return tag + tags->nr_reserved_tags;
}
static unsigned int __blk_mq_get_reserved_tag(struct blk_mq_tags *tags,
gfp_t gfp)
{
int tag;
if (unlikely(!tags->nr_reserved_tags)) {
WARN_ON_ONCE(1);
return BLK_MQ_TAG_FAIL;
}
tag = percpu_ida_alloc(&tags->reserved_tags, gfp);
if (tag < 0)
return BLK_MQ_TAG_FAIL;
return tag;
}
static unsigned int __blk_mq_get_reserved_tag(struct blk_mq_tags *tags,
gfp_t gfp)
{
int tag;
if (unlikely(!tags->nr_reserved_tags)) {
WARN_ON_ONCE(1);
return BLK_MQ_TAG_FAIL;
}
tag = percpu_ida_alloc(&tags->reserved_tags, (gfp & __GFP_WAIT) ?
TASK_UNINTERRUPTIBLE : TASK_RUNNING);
if (tag < 0)
return BLK_MQ_TAG_FAIL;
return tag;
}
