From 436f4a0a99520623ef3fb994d70d2938fc9f00b6 Mon Sep 17 00:00:00 2001 From: Nicholas Bellinger Date: Sun, 8 Feb 2015 12:31:39 -0800 Subject: [PATCH] loopback: Add fabric_prot_type attribute support This patch updates loopback to add a new fabric_prot_type TPG attribute, used for controlling LLD level protection into LIO when the backend device does not support T10-PI. Also, go ahead and set DIN_PASS + DOUT_PASS so target-core knows that it will be doing any WRITE_STRIP and READ_INSERT operations. Cc: Martin Petersen Cc: Sagi Grimberg Cc: Hannes Reinecke Signed-off-by: Nicholas Bellinger --- drivers/target/loopback/tcm_loop.c | 54 ++++++++++++++++++++++++++++-- drivers/target/loopback/tcm_loop.h | 1 + 2 files changed, 53 insertions(+), 2 deletions(-) diff --git a/drivers/target/loopback/tcm_loop.c b/drivers/target/loopback/tcm_loop.c index f4618e722187..797c7315f520 100644 --- a/drivers/target/loopback/tcm_loop.c +++ b/drivers/target/loopback/tcm_loop.c @@ -697,6 +697,13 @@ static int tcm_loop_check_prod_mode_write_protect(struct se_portal_group *se_tpg return 0; } +static int tcm_loop_check_prot_fabric_only(struct se_portal_group *se_tpg) +{ + struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, struct tcm_loop_tpg, + tl_se_tpg); + return tl_tpg->tl_fabric_prot_type; +} + static struct se_node_acl *tcm_loop_tpg_alloc_fabric_acl( struct se_portal_group *se_tpg) { @@ -912,6 +919,46 @@ static void tcm_loop_port_unlink( /* End items for tcm_loop_port_cit */ +static ssize_t tcm_loop_tpg_attrib_show_fabric_prot_type( + struct se_portal_group *se_tpg, + char *page) +{ + struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, struct tcm_loop_tpg, + tl_se_tpg); + + return sprintf(page, "%d\n", tl_tpg->tl_fabric_prot_type); +} + +static ssize_t tcm_loop_tpg_attrib_store_fabric_prot_type( + struct se_portal_group *se_tpg, + const char *page, + size_t count) +{ + struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, struct tcm_loop_tpg, + tl_se_tpg); + unsigned long val; + int ret = kstrtoul(page, 0, &val); + + if (ret) { + pr_err("kstrtoul() returned %d for fabric_prot_type\n", ret); + return ret; + } + if (val != 0 && val != 1 && val != 3) { + pr_err("Invalid qla2xxx fabric_prot_type: %lu\n", val); + return -EINVAL; + } + tl_tpg->tl_fabric_prot_type = val; + + return count; +} + +TF_TPG_ATTRIB_ATTR(tcm_loop, fabric_prot_type, S_IRUGO | S_IWUSR); + +static struct configfs_attribute *tcm_loop_tpg_attrib_attrs[] = { + &tcm_loop_tpg_attrib_fabric_prot_type.attr, + NULL, +}; + /* Start items for tcm_loop_nexus_cit */ static int tcm_loop_make_nexus( @@ -937,7 +984,8 @@ static int tcm_loop_make_nexus( /* * Initialize the struct se_session pointer */ - tl_nexus->se_sess = transport_init_session(TARGET_PROT_ALL); + tl_nexus->se_sess = transport_init_session( + TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS); if (IS_ERR(tl_nexus->se_sess)) { ret = PTR_ERR(tl_nexus->se_sess); goto out; @@ -1377,6 +1425,8 @@ static int tcm_loop_register_configfs(void) &tcm_loop_check_demo_mode_write_protect; fabric->tf_ops.tpg_check_prod_mode_write_protect = &tcm_loop_check_prod_mode_write_protect; + fabric->tf_ops.tpg_check_prot_fabric_only = + &tcm_loop_check_prot_fabric_only; /* * The TCM loopback fabric module runs in demo-mode to a local * virtual SCSI device, so fabric dependent initator ACLs are @@ -1429,7 +1479,7 @@ static int tcm_loop_register_configfs(void) */ fabric->tf_cit_tmpl.tfc_wwn_cit.ct_attrs = tcm_loop_wwn_attrs; fabric->tf_cit_tmpl.tfc_tpg_base_cit.ct_attrs = tcm_loop_tpg_attrs; - fabric->tf_cit_tmpl.tfc_tpg_attrib_cit.ct_attrs = NULL; + fabric->tf_cit_tmpl.tfc_tpg_attrib_cit.ct_attrs = tcm_loop_tpg_attrib_attrs; fabric->tf_cit_tmpl.tfc_tpg_param_cit.ct_attrs = NULL; fabric->tf_cit_tmpl.tfc_tpg_np_base_cit.ct_attrs = NULL; /* diff --git a/drivers/target/loopback/tcm_loop.h b/drivers/target/loopback/tcm_loop.h index 6ae49f272ba6..1e72ff77cac9 100644 --- a/drivers/target/loopback/tcm_loop.h +++ b/drivers/target/loopback/tcm_loop.h @@ -43,6 +43,7 @@ struct tcm_loop_nacl { struct tcm_loop_tpg { unsigned short tl_tpgt; unsigned short tl_transport_status; + enum target_prot_type tl_fabric_prot_type; atomic_t tl_tpg_port_count; struct se_portal_group tl_se_tpg; struct tcm_loop_hba *tl_hba; -- GitLab