diff options
| -rw-r--r-- | drivers/target/target_core_transport.c | 56 | ||||
| -rw-r--r-- | include/target/target_core_fabric.h | 6 |
2 files changed, 62 insertions, 0 deletions
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index 867bc6d0a68a..f5ad9e063b65 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -281,6 +281,17 @@ struct se_session *transport_init_session_tags(unsigned int tag_num, struct se_session *se_sess; int rc; + if (tag_num != 0 && !tag_size) { + pr_err("init_session_tags called with percpu-ida tag_num:" + " %u, but zero tag_size\n", tag_num); + return ERR_PTR(-EINVAL); + } + if (!tag_num && tag_size) { + pr_err("init_session_tags called with percpu-ida tag_size:" + " %u, but zero tag_num\n", tag_size); + return ERR_PTR(-EINVAL); + } + se_sess = transport_init_session(sup_prot_ops); if (IS_ERR(se_sess)) return se_sess; @@ -374,6 +385,51 @@ void transport_register_session( } EXPORT_SYMBOL(transport_register_session); +struct se_session * +target_alloc_session(struct se_portal_group *tpg, + unsigned int tag_num, unsigned int tag_size, + enum target_prot_op prot_op, + const char *initiatorname, void *private, + int (*callback)(struct se_portal_group *, + struct se_session *, void *)) +{ + struct se_session *sess; + + /* + * If the fabric driver is using percpu-ida based pre allocation + * of I/O descriptor tags, go ahead and perform that setup now.. + */ + if (tag_num != 0) + sess = transport_init_session_tags(tag_num, tag_size, prot_op); + else + sess = transport_init_session(prot_op); + + if (IS_ERR(sess)) + return sess; + + sess->se_node_acl = core_tpg_check_initiator_node_acl(tpg, + (unsigned char *)initiatorname); + if (!sess->se_node_acl) { + transport_free_session(sess); + return ERR_PTR(-EACCES); + } + /* + * Go ahead and perform any remaining fabric setup that is + * required before transport_register_session(). + */ + if (callback != NULL) { + int rc = callback(tpg, sess, private); + if (rc) { + transport_free_session(sess); + return ERR_PTR(rc); + } + } + + transport_register_session(tpg, sess->se_node_acl, sess, private); + return sess; +} +EXPORT_SYMBOL(target_alloc_session); + static void target_release_session(struct kref *kref) { struct se_session *se_sess = container_of(kref, diff --git a/include/target/target_core_fabric.h b/include/target/target_core_fabric.h index 56653408f53b..685a51aa98cc 100644 --- a/include/target/target_core_fabric.h +++ b/include/target/target_core_fabric.h @@ -108,6 +108,12 @@ void target_unregister_template(const struct target_core_fabric_ops *fo); int target_depend_item(struct config_item *item); void target_undepend_item(struct config_item *item); +struct se_session *target_alloc_session(struct se_portal_group *, + unsigned int, unsigned int, enum target_prot_op prot_op, + const char *, void *, + int (*callback)(struct se_portal_group *, + struct se_session *, void *)); + struct se_session *transport_init_session(enum target_prot_op); int transport_alloc_session_tags(struct se_session *, unsigned int, unsigned int); |