From 22d11759a4e7018f8cd7914e4e706ca2c96d6c01 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Mon, 2 May 2016 15:45:21 +0200 Subject: [PATCH] target: make ->shutdown_session optional Turns out the template and thus many drivers got the return value wrong: 0 means the fabrics driver needs to put a session reference, which no driver except for the iSCSI target drivers did. Fortunately none of these drivers supports explicit Node ACLs, so the bug was harmless. Even without that only qla2xxx and iscsi every did real work in shutdown_session, so get rid of the boilerplate code in all other drivers. Signed-off-by: Christoph Hellwig Signed-off-by: Nicholas Bellinger --- Documentation/target/tcm_mod_builder.py | 8 -------- drivers/infiniband/ulp/srpt/ib_srpt.c | 9 --------- drivers/target/loopback/tcm_loop.c | 6 ------ drivers/target/sbp/sbp_target.c | 6 ------ drivers/target/target_core_configfs.c | 4 ---- drivers/target/target_core_tpg.c | 5 ++++- drivers/target/tcm_fc/tcm_fc.h | 1 - drivers/target/tcm_fc/tfc_conf.c | 1 - drivers/target/tcm_fc/tfc_sess.c | 12 ------------ drivers/usb/gadget/function/f_tcm.c | 6 ------ drivers/vhost/scsi.c | 6 ------ drivers/xen/xen-scsiback.c | 6 ------ 12 files changed, 4 insertions(+), 66 deletions(-) diff --git a/Documentation/target/tcm_mod_builder.py b/Documentation/target/tcm_mod_builder.py index 7d370c9b1450..6b8aa4086c5d 100755 --- a/Documentation/target/tcm_mod_builder.py +++ b/Documentation/target/tcm_mod_builder.py @@ -294,7 +294,6 @@ def tcm_mod_build_configfs(proto_ident, fabric_mod_dir_var, fabric_mod_name): buf += " .tpg_check_prod_mode_write_protect = " + fabric_mod_name + "_check_false,\n" buf += " .tpg_get_inst_index = " + fabric_mod_name + "_tpg_get_inst_index,\n" buf += " .release_cmd = " + fabric_mod_name + "_release_cmd,\n" - buf += " .shutdown_session = " + fabric_mod_name + "_shutdown_session,\n" buf += " .close_session = " + fabric_mod_name + "_close_session,\n" buf += " .sess_get_index = " + fabric_mod_name + "_sess_get_index,\n" buf += " .sess_get_initiator_sid = NULL,\n" @@ -467,13 +466,6 @@ def tcm_mod_dump_fabric_ops(proto_ident, fabric_mod_dir_var, fabric_mod_name): buf += "}\n\n" bufi += "void " + fabric_mod_name + "_release_cmd(struct se_cmd *);\n" - if re.search('shutdown_session\)\(', fo): - buf += "int " + fabric_mod_name + "_shutdown_session(struct se_session *se_sess)\n" - buf += "{\n" - buf += " return 0;\n" - buf += "}\n\n" - bufi += "int " + fabric_mod_name + "_shutdown_session(struct se_session *);\n" - if re.search('close_session\)\(', fo): buf += "void " + fabric_mod_name + "_close_session(struct se_session *se_sess)\n" buf += "{\n" diff --git a/drivers/infiniband/ulp/srpt/ib_srpt.c b/drivers/infiniband/ulp/srpt/ib_srpt.c index 8b42401d4795..3b425af04572 100644 --- a/drivers/infiniband/ulp/srpt/ib_srpt.c +++ b/drivers/infiniband/ulp/srpt/ib_srpt.c @@ -1960,14 +1960,6 @@ static void __srpt_close_all_ch(struct srpt_device *sdev) } } -/** - * srpt_shutdown_session() - Whether or not a session may be shut down. - */ -static int srpt_shutdown_session(struct se_session *se_sess) -{ - return 1; -} - static void srpt_free_ch(struct kref *kref) { struct srpt_rdma_ch *ch = container_of(kref, struct srpt_rdma_ch, kref); @@ -3287,7 +3279,6 @@ static const struct target_core_fabric_ops srpt_template = { .tpg_get_inst_index = srpt_tpg_get_inst_index, .release_cmd = srpt_release_cmd, .check_stop_free = srpt_check_stop_free, - .shutdown_session = srpt_shutdown_session, .close_session = srpt_close_session, .sess_get_index = srpt_sess_get_index, .sess_get_initiator_sid = NULL, diff --git a/drivers/target/loopback/tcm_loop.c b/drivers/target/loopback/tcm_loop.c index 0ad5ac541a7f..0941b2c13f5a 100644 --- a/drivers/target/loopback/tcm_loop.c +++ b/drivers/target/loopback/tcm_loop.c @@ -601,11 +601,6 @@ static int tcm_loop_get_cmd_state(struct se_cmd *se_cmd) return tl_cmd->sc_cmd_state; } -static int tcm_loop_shutdown_session(struct se_session *se_sess) -{ - return 0; -} - static void tcm_loop_close_session(struct se_session *se_sess) { return; @@ -1243,7 +1238,6 @@ static const struct target_core_fabric_ops loop_ops = { .tpg_get_inst_index = tcm_loop_get_inst_index, .check_stop_free = tcm_loop_check_stop_free, .release_cmd = tcm_loop_release_cmd, - .shutdown_session = tcm_loop_shutdown_session, .close_session = tcm_loop_close_session, .sess_get_index = tcm_loop_sess_get_index, .write_pending = tcm_loop_write_pending, diff --git a/drivers/target/sbp/sbp_target.c b/drivers/target/sbp/sbp_target.c index c57e7884973d..6c8b8f84a047 100644 --- a/drivers/target/sbp/sbp_target.c +++ b/drivers/target/sbp/sbp_target.c @@ -1726,11 +1726,6 @@ static void sbp_release_cmd(struct se_cmd *se_cmd) sbp_free_request(req); } -static int sbp_shutdown_session(struct se_session *se_sess) -{ - return 0; -} - static void sbp_close_session(struct se_session *se_sess) { return; @@ -2349,7 +2344,6 @@ static const struct target_core_fabric_ops sbp_ops = { .tpg_check_prod_mode_write_protect = sbp_check_false, .tpg_get_inst_index = sbp_tpg_get_inst_index, .release_cmd = sbp_release_cmd, - .shutdown_session = sbp_shutdown_session, .close_session = sbp_close_session, .sess_get_index = sbp_sess_get_index, .write_pending = sbp_write_pending, diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c index 73c23c75528a..75c5000ca95e 100644 --- a/drivers/target/target_core_configfs.c +++ b/drivers/target/target_core_configfs.c @@ -385,10 +385,6 @@ static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo) pr_err("Missing tfo->release_cmd()\n"); return -EINVAL; } - if (!tfo->shutdown_session) { - pr_err("Missing tfo->shutdown_session()\n"); - return -EINVAL; - } if (!tfo->close_session) { pr_err("Missing tfo->close_session()\n"); return -EINVAL; diff --git a/drivers/target/target_core_tpg.c b/drivers/target/target_core_tpg.c index b1ac600f5b45..a81a37045403 100644 --- a/drivers/target/target_core_tpg.c +++ b/drivers/target/target_core_tpg.c @@ -353,7 +353,10 @@ restart: list_del_init(&sess->sess_acl_list); spin_unlock_irqrestore(&acl->nacl_sess_lock, flags); - ret = acl->se_tpg->se_tpg_tfo->shutdown_session(sess); + if (acl->se_tpg->se_tpg_tfo->shutdown_session) + ret = acl->se_tpg->se_tpg_tfo->shutdown_session(sess); + else + ret = 1; target_put_session(sess); if (ret) target_put_session(sess); diff --git a/drivers/target/tcm_fc/tcm_fc.h b/drivers/target/tcm_fc/tcm_fc.h index c30003bd4ff0..e28209b99b59 100644 --- a/drivers/target/tcm_fc/tcm_fc.h +++ b/drivers/target/tcm_fc/tcm_fc.h @@ -139,7 +139,6 @@ extern unsigned int ft_debug_logging; * Session ops. */ void ft_sess_put(struct ft_sess *); -int ft_sess_shutdown(struct se_session *); void ft_sess_close(struct se_session *); u32 ft_sess_get_index(struct se_session *); u32 ft_sess_get_port_name(struct se_session *, unsigned char *, u32); diff --git a/drivers/target/tcm_fc/tfc_conf.c b/drivers/target/tcm_fc/tfc_conf.c index 4d375e95841b..42ee91123dca 100644 --- a/drivers/target/tcm_fc/tfc_conf.c +++ b/drivers/target/tcm_fc/tfc_conf.c @@ -442,7 +442,6 @@ static const struct target_core_fabric_ops ft_fabric_ops = { .tpg_get_inst_index = ft_tpg_get_inst_index, .check_stop_free = ft_check_stop_free, .release_cmd = ft_release_cmd, - .shutdown_session = ft_sess_shutdown, .close_session = ft_sess_close, .sess_get_index = ft_sess_get_index, .sess_get_initiator_sid = NULL, diff --git a/drivers/target/tcm_fc/tfc_sess.c b/drivers/target/tcm_fc/tfc_sess.c index d0c3e1894c61..f5186a744399 100644 --- a/drivers/target/tcm_fc/tfc_sess.c +++ b/drivers/target/tcm_fc/tfc_sess.c @@ -302,18 +302,6 @@ static void ft_sess_delete_all(struct ft_tport *tport) * TCM ops for sessions. */ -/* - * Determine whether session is allowed to be shutdown in the current context. - * Returns non-zero if the session should be shutdown. - */ -int ft_sess_shutdown(struct se_session *se_sess) -{ - struct ft_sess *sess = se_sess->fabric_sess_ptr; - - pr_debug("port_id %x\n", sess->port_id); - return 1; -} - /* * Remove session and send PRLO. * This is called when the ACL is being deleted or queue depth is changing. diff --git a/drivers/usb/gadget/function/f_tcm.c b/drivers/usb/gadget/function/f_tcm.c index 2ace0295408e..f4ed427e04ce 100644 --- a/drivers/usb/gadget/function/f_tcm.c +++ b/drivers/usb/gadget/function/f_tcm.c @@ -1290,11 +1290,6 @@ static void usbg_release_cmd(struct se_cmd *se_cmd) percpu_ida_free(&se_sess->sess_tag_pool, se_cmd->map_tag); } -static int usbg_shutdown_session(struct se_session *se_sess) -{ - return 0; -} - static void usbg_close_session(struct se_session *se_sess) { } @@ -1735,7 +1730,6 @@ static const struct target_core_fabric_ops usbg_ops = { .tpg_check_prod_mode_write_protect = usbg_check_false, .tpg_get_inst_index = usbg_tpg_get_inst_index, .release_cmd = usbg_release_cmd, - .shutdown_session = usbg_shutdown_session, .close_session = usbg_close_session, .sess_get_index = usbg_sess_get_index, .sess_get_initiator_sid = NULL, diff --git a/drivers/vhost/scsi.c b/drivers/vhost/scsi.c index 0e6fd556c982..d2c60e5c48b3 100644 --- a/drivers/vhost/scsi.c +++ b/drivers/vhost/scsi.c @@ -333,11 +333,6 @@ static void vhost_scsi_release_cmd(struct se_cmd *se_cmd) percpu_ida_free(&se_sess->sess_tag_pool, se_cmd->map_tag); } -static int vhost_scsi_shutdown_session(struct se_session *se_sess) -{ - return 0; -} - static void vhost_scsi_close_session(struct se_session *se_sess) { return; @@ -2114,7 +2109,6 @@ static struct target_core_fabric_ops vhost_scsi_ops = { .tpg_get_inst_index = vhost_scsi_tpg_get_inst_index, .release_cmd = vhost_scsi_release_cmd, .check_stop_free = vhost_scsi_check_stop_free, - .shutdown_session = vhost_scsi_shutdown_session, .close_session = vhost_scsi_close_session, .sess_get_index = vhost_scsi_sess_get_index, .sess_get_initiator_sid = NULL, diff --git a/drivers/xen/xen-scsiback.c b/drivers/xen/xen-scsiback.c index ff932624eaad..783947a272ab 100644 --- a/drivers/xen/xen-scsiback.c +++ b/drivers/xen/xen-scsiback.c @@ -1399,11 +1399,6 @@ static void scsiback_release_cmd(struct se_cmd *se_cmd) percpu_ida_free(&se_sess->sess_tag_pool, se_cmd->map_tag); } -static int scsiback_shutdown_session(struct se_session *se_sess) -{ - return 0; -} - static void scsiback_close_session(struct se_session *se_sess) { } @@ -1841,7 +1836,6 @@ static const struct target_core_fabric_ops scsiback_ops = { .tpg_get_inst_index = scsiback_tpg_get_inst_index, .check_stop_free = scsiback_check_stop_free, .release_cmd = scsiback_release_cmd, - .shutdown_session = scsiback_shutdown_session, .close_session = scsiback_close_session, .sess_get_index = scsiback_sess_get_index, .sess_get_initiator_sid = NULL,