/* * Copyright (C) 2002-2003 Ardis Technolgies <roman@ardistech.com> * * Released under the terms of the GNU GPL v2.0. */#include "iscsi.h"#include "iscsi_dbg.h"struct iscsi_session *session_lookup(struct iscsi_target *target, u64 sid){	struct iscsi_session *session;	list_for_each_entry(session, &target->session_list, list) {		if (session->sid == sid)			return session;	}	return NULL;}static struct iscsi_session *iet_session_alloc(struct iscsi_target *target, struct session_info *info){	int i;	struct iscsi_session *session;	dprintk(D_SETUP, "%p %u %#Lx\n", target, target->tid,		(unsigned long long) info->sid);	session = kzalloc(sizeof(*session), GFP_KERNEL);	if (!session)		return NULL;	session->target = target;	session->sid = info->sid;	memcpy(&session->param, &target->sess_param, sizeof(session->param));	session->max_queued_cmnds = target->trgt_param.queued_cmnds;	session->exp_cmd_sn = info->exp_cmd_sn;	session->max_cmd_sn = info->max_cmd_sn;	session->initiator = kstrdup(info->initiator_name, GFP_KERNEL);	if (!session->initiator) {		kfree(session);		return NULL;	}	INIT_LIST_HEAD(&session->conn_list);	INIT_LIST_HEAD(&session->pending_list);	spin_lock_init(&session->cmnd_hash_lock);	for (i = 0; i < ARRAY_SIZE(session->cmnd_hash); i++)		INIT_LIST_HEAD(&session->cmnd_hash[i]);	session->next_ttt = 1;	list_add(&session->list, &target->session_list);	return session;}static int session_free(struct iscsi_session *session){	int i;	dprintk(D_SETUP, "%#Lx\n", (unsigned long long) session->sid);	assert(list_empty(&session->conn_list));	for (i = 0; i < ARRAY_SIZE(session->cmnd_hash); i++) {		if (!list_empty(&session->cmnd_hash[i]))			BUG();	}	list_del(&session->list);	kfree(session->initiator);	kfree(session);	return 0;}int session_add(struct iscsi_target *target, struct session_info *info){	struct iscsi_session *session;	int err = -EEXIST;	session = session_lookup(target, info->sid);	if (session)		return err;	session = iet_session_alloc(target, info);	if (!session)		err = -ENOMEM;	return err;}int session_del(struct iscsi_target *target, u64 sid){	struct iscsi_session *session;	session = session_lookup(target, sid);	if (!session)		return -ENOENT;	if (!list_empty(&session->conn_list)) {		eprintk("%llu still have connections\n", (unsigned long long) session->sid);		return -EBUSY;	}	return session_free(session);}static void iet_session_info_show(struct seq_file *seq, struct iscsi_target *target){	struct iscsi_session *session;	list_for_each_entry(session, &target->session_list, list) {		seq_printf(seq, "\tsid:%llu initiator:%s\n",			   (unsigned long long) session->sid, session->initiator);		conn_info_show(seq, session);	}}static int iet_sessions_info_show(struct seq_file *seq, void *v){	return iet_info_show(seq, iet_session_info_show);}static int iet_session_seq_open(struct inode *inode, struct file *file){	return single_open(file, iet_sessions_info_show, NULL);}struct file_operations session_seq_fops = {	.owner		= THIS_MODULE,	.open		= iet_session_seq_open,	.read		= seq_read,	.llseek		= seq_lseek,	.release	= single_release,};