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target: Convert demo-mode only drivers to target_alloc_session

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This patch converts existing loopback, usb-gadget, and
xen-scsiback demo-mode only fabric drivers to use the
new target_alloc_session API caller.

This includes adding a new alloc_session callback for
fabric driver internal nexus pointer assignments.

(Fixes for early for-next nexus breakage - Dan Carpenter)

Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Acked-by: Juergen Gross <jgross@suse.com>
Tested-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Tested-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Christoph Hellwig
2016-01-09 05:30:45 -08:00
committed by Nicholas Bellinger
parent 7861728d42
commit fb444abe61
4 changed files with 72 additions and 122 deletions
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60
drivers/xen/xen-scsiback.c
View File

@@ -1482,61 +1482,47 @@ static struct configfs_attribute *scsiback_param_attrs[] = {
NULL,
};
static int scsiback_alloc_sess_cb(struct se_portal_group *se_tpg,
struct se_session *se_sess, void *p)
{
struct scsiback_tpg *tpg = container_of(se_tpg,
struct scsiback_tpg, se_tpg);
tpg->tpg_nexus = p;
return 0;
}
static int scsiback_make_nexus(struct scsiback_tpg *tpg,
const char *name)
{
struct se_portal_group *se_tpg;
struct se_session *se_sess;
struct scsiback_nexus *tv_nexus;
int ret = 0;
mutex_lock(&tpg->tv_tpg_mutex);
if (tpg->tpg_nexus) {
mutex_unlock(&tpg->tv_tpg_mutex);
pr_debug("tpg->tpg_nexus already exists\n");
return -EEXIST;
ret = -EEXIST;
goto out_unlock;
}
se_tpg = &tpg->se_tpg;
tv_nexus = kzalloc(sizeof(struct scsiback_nexus), GFP_KERNEL);
if (!tv_nexus) {
mutex_unlock(&tpg->tv_tpg_mutex);
return -ENOMEM;
ret = -ENOMEM;
goto out_unlock;
}
/*
* Initialize the struct se_session pointer
*/
tv_nexus->tvn_se_sess = transport_init_session(TARGET_PROT_NORMAL);
tv_nexus->tvn_se_sess = target_alloc_session(&tpg->se_tpg, 0, 0,
TARGET_PROT_NORMAL, name,
tv_nexus, scsiback_alloc_sess_cb);
if (IS_ERR(tv_nexus->tvn_se_sess)) {
mutex_unlock(&tpg->tv_tpg_mutex);
kfree(tv_nexus);
return -ENOMEM;
ret = -ENOMEM;
goto out_unlock;
}
se_sess = tv_nexus->tvn_se_sess;
/*
* Since we are running in 'demo mode' this call with generate a
* struct se_node_acl for the scsiback struct se_portal_group with
* the SCSI Initiator port name of the passed configfs group 'name'.
*/
tv_nexus->tvn_se_sess->se_node_acl = core_tpg_check_initiator_node_acl(
se_tpg, (unsigned char *)name);
if (!tv_nexus->tvn_se_sess->se_node_acl) {
mutex_unlock(&tpg->tv_tpg_mutex);
pr_debug("core_tpg_check_initiator_node_acl() failed for %s\n",
name);
goto out;
}
/* Now register the TCM pvscsi virtual I_T Nexus as active. */
transport_register_session(se_tpg, tv_nexus->tvn_se_sess->se_node_acl,
tv_nexus->tvn_se_sess, tv_nexus);
tpg->tpg_nexus = tv_nexus;
out_unlock:
mutex_unlock(&tpg->tv_tpg_mutex);
return 0;
out:
transport_free_session(se_sess);
kfree(tv_nexus);
return -ENOMEM;
return ret;
}
static int scsiback_drop_nexus(struct scsiback_tpg *tpg)