From fb2b2844743bc3d84ce1033167210e5fe3963455 Mon Sep 17 00:00:00 2001 From: Hannes Reinecke Date: Wed, 16 Oct 2013 09:12:53 +0200 Subject: tcm_loop: Implement transport offline Add attribute 'transport_status' to simulate link failure. Signed-off-by: Hannes Reinecke Signed-off-by: Nicholas Bellinger --- drivers/target/loopback/tcm_loop.c | 53 +++++++++++++++++++++++++++++++++++++- drivers/target/loopback/tcm_loop.h | 4 +++ 2 files changed, 56 insertions(+), 1 deletion(-) diff --git a/drivers/target/loopback/tcm_loop.c b/drivers/target/loopback/tcm_loop.c index 21b49f35172..a00ad27940b 100644 --- a/drivers/target/loopback/tcm_loop.c +++ b/drivers/target/loopback/tcm_loop.c @@ -178,7 +178,10 @@ static void tcm_loop_submission_work(struct work_struct *work) set_host_byte(sc, DID_NO_CONNECT); goto out_done; } - + if (tl_tpg->tl_transport_status == TCM_TRANSPORT_OFFLINE) { + set_host_byte(sc, DID_TRANSPORT_DISRUPTED); + goto out_done; + } tl_nexus = tl_hba->tl_nexus; if (!tl_nexus) { scmd_printk(KERN_ERR, sc, "TCM_Loop I_T Nexus" @@ -1064,8 +1067,56 @@ check_newline: TF_TPG_BASE_ATTR(tcm_loop, nexus, S_IRUGO | S_IWUSR); +static ssize_t tcm_loop_tpg_show_transport_status( + 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); + const char *status = NULL; + ssize_t ret = -EINVAL; + + switch (tl_tpg->tl_transport_status) { + case TCM_TRANSPORT_ONLINE: + status = "online"; + break; + case TCM_TRANSPORT_OFFLINE: + status = "offline"; + break; + default: + break; + } + + if (status) + ret = snprintf(page, PAGE_SIZE, "%s\n", status); + + return ret; +} + +static ssize_t tcm_loop_tpg_store_transport_status( + 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); + + if (!strncmp(page, "online", 6)) { + tl_tpg->tl_transport_status = TCM_TRANSPORT_ONLINE; + return count; + } + if (!strncmp(page, "offline", 7)) { + tl_tpg->tl_transport_status = TCM_TRANSPORT_OFFLINE; + return count; + } + return -EINVAL; +} + +TF_TPG_BASE_ATTR(tcm_loop, transport_status, S_IRUGO | S_IWUSR); + static struct configfs_attribute *tcm_loop_tpg_attrs[] = { &tcm_loop_tpg_nexus.attr, + &tcm_loop_tpg_transport_status.attr, NULL, }; diff --git a/drivers/target/loopback/tcm_loop.h b/drivers/target/loopback/tcm_loop.h index dd7a84ee78e..56528f7dafa 100644 --- a/drivers/target/loopback/tcm_loop.h +++ b/drivers/target/loopback/tcm_loop.h @@ -40,8 +40,12 @@ struct tcm_loop_nacl { struct se_node_acl se_node_acl; }; +#define TCM_TRANSPORT_ONLINE 0 +#define TCM_TRANSPORT_OFFLINE 1 + struct tcm_loop_tpg { unsigned short tl_tpgt; + unsigned short tl_transport_status; atomic_t tl_tpg_port_count; struct se_portal_group tl_se_tpg; struct tcm_loop_hba *tl_hba; -- cgit v1.2.3-70-g09d2