From ecc3f3edbfb65e7706d704c5aac0f7bd60df93de Mon Sep 17 00:00:00 2001 From: Nicholas Mc Guire Date: Fri, 16 Jan 2015 12:20:17 +0100 Subject: ib_srpt: wait_for_completion_timeout does not return negative status This patch changes srpt_close_session() to properly use an unsigned long for wait_for_completion_timeout()'s return value, and to update WARN_ON() to only trigger for a zero return. Signed-off-by: Nicholas Mc Guire Signed-off-by: Nicholas Bellinger --- drivers/infiniband/ulp/srpt/ib_srpt.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/infiniband') diff --git a/drivers/infiniband/ulp/srpt/ib_srpt.c b/drivers/infiniband/ulp/srpt/ib_srpt.c index eb694ddad79f..6e0a477681e9 100644 --- a/drivers/infiniband/ulp/srpt/ib_srpt.c +++ b/drivers/infiniband/ulp/srpt/ib_srpt.c @@ -3518,7 +3518,7 @@ static void srpt_close_session(struct se_session *se_sess) DECLARE_COMPLETION_ONSTACK(release_done); struct srpt_rdma_ch *ch; struct srpt_device *sdev; - int res; + unsigned long res; ch = se_sess->fabric_sess_ptr; WARN_ON(ch->sess != se_sess); @@ -3533,7 +3533,7 @@ static void srpt_close_session(struct se_session *se_sess) spin_unlock_irq(&sdev->spinlock); res = wait_for_completion_timeout(&release_done, 60 * HZ); - WARN_ON(res <= 0); + WARN_ON(res == 0); } /** -- cgit v1.2.1 From 45678b6b7891b8eef5b5951415287d1fa0ff71ad Mon Sep 17 00:00:00 2001 From: Sagi Grimberg Date: Sun, 25 Jan 2015 19:11:19 +0200 Subject: iser-target: Fix sparse warning isert_debug_level should be static, hence no need to initialize it. Reported-by: Shachar Raindel Signed-off-by: Sagi Grimberg Signed-off-by: Nicholas Bellinger --- drivers/infiniband/ulp/isert/ib_isert.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/infiniband') diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c index dafb3c531f96..29adca121238 100644 --- a/drivers/infiniband/ulp/isert/ib_isert.c +++ b/drivers/infiniband/ulp/isert/ib_isert.c @@ -38,7 +38,7 @@ #define ISER_MAX_CQ_LEN (ISER_MAX_RX_CQ_LEN + ISER_MAX_TX_CQ_LEN + \ ISERT_MAX_CONN) -int isert_debug_level = 0; +static int isert_debug_level; module_param_named(debug_level, isert_debug_level, int, 0644); MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0 (default:0)"); -- cgit v1.2.1 From f64d2792dde1423af05e661abcf28e7fab9c6e28 Mon Sep 17 00:00:00 2001 From: Sagi Grimberg Date: Sun, 25 Jan 2015 19:11:20 +0200 Subject: iser-target: Fix typo in isert_put_text_rsp We are sending text response and not reject. Signed-off-by: Sagi Grimberg Signed-off-by: Nicholas Bellinger --- drivers/infiniband/ulp/isert/ib_isert.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/infiniband') diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c index 29adca121238..1b35c8a9dcee 100644 --- a/drivers/infiniband/ulp/isert/ib_isert.c +++ b/drivers/infiniband/ulp/isert/ib_isert.c @@ -2275,7 +2275,7 @@ isert_put_text_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) } isert_init_send_wr(isert_conn, isert_cmd, send_wr); - isert_dbg("conn %p Text Reject\n", isert_conn); + isert_dbg("conn %p Text Response\n", isert_conn); return isert_post_response(isert_conn, isert_cmd); } -- cgit v1.2.1 From 631af550621071d56abe2edbb63d9afd4f4dafcf Mon Sep 17 00:00:00 2001 From: Sagi Grimberg Date: Sun, 25 Jan 2015 19:09:50 +0200 Subject: iser-target: Use WQ_UNBOUND for completion workqueue Bound workqueues might be too restrictive since they allow only a single core per session for processing completions. WQ_UNBOUND will allow bouncing to another CPU if the running CPU is currently busy. Luckily, our workqueues are NUMA aware and will first try to bounce within the same NUMA socket. My measurements with NULL backend devices show that there is no (noticeable) additional latency as a result of the change. I'd expect even to gain performance when working with fast devices that also allocate MSIX interrupt vectors. While we're at it, make it WQ_HIGHPRI since processing completions is really a high priority for performance. Signed-off-by: Sagi Grimberg Reported-by: Moussa Ba Signed-off-by: Moussa Ba Signed-off-by: Nicholas Bellinger --- drivers/infiniband/ulp/isert/ib_isert.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/infiniband') diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c index 1b35c8a9dcee..7f6a0d288f02 100644 --- a/drivers/infiniband/ulp/isert/ib_isert.c +++ b/drivers/infiniband/ulp/isert/ib_isert.c @@ -3320,7 +3320,8 @@ static int __init isert_init(void) { int ret; - isert_comp_wq = alloc_workqueue("isert_comp_wq", 0, 0); + isert_comp_wq = alloc_workqueue("isert_comp_wq", + WQ_UNBOUND | WQ_HIGHPRI, 0); if (!isert_comp_wq) { isert_err("Unable to allocate isert_comp_wq\n"); ret = -ENOMEM; -- cgit v1.2.1 From b44a2b6790b04621c14de176757a09193699bc37 Mon Sep 17 00:00:00 2001 From: Sagi Grimberg Date: Mon, 26 Jan 2015 12:49:08 +0200 Subject: iser-target: Fix wrong allocation in the case of an empty text message if text message dlength is 0, don't allocate a buffer for it, pass NULL to iscsit_process_text_cmd. Signed-off-by: Sagi Grimberg Signed-off-by: Nicholas Bellinger --- drivers/infiniband/ulp/isert/ib_isert.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) (limited to 'drivers/infiniband') diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c index 7f6a0d288f02..1d31ffb5d789 100644 --- a/drivers/infiniband/ulp/isert/ib_isert.c +++ b/drivers/infiniband/ulp/isert/ib_isert.c @@ -1351,17 +1351,19 @@ isert_handle_text_cmd(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd struct iscsi_conn *conn = isert_conn->conn; u32 payload_length = ntoh24(hdr->dlength); int rc; - unsigned char *text_in; + unsigned char *text_in = NULL; rc = iscsit_setup_text_cmd(conn, cmd, hdr); if (rc < 0) return rc; - text_in = kzalloc(payload_length, GFP_KERNEL); - if (!text_in) { - isert_err("Unable to allocate text_in of payload_length: %u\n", - payload_length); - return -ENOMEM; + if (payload_length) { + text_in = kzalloc(payload_length, GFP_KERNEL); + if (!text_in) { + isert_err("Unable to allocate text_in of payload_length: %u\n", + payload_length); + return -ENOMEM; + } } cmd->text_in_ptr = text_in; -- cgit v1.2.1 From 11378cdbb69521530f69072a987f7f1280747c1a Mon Sep 17 00:00:00 2001 From: Rasmus Villemoes Date: Fri, 6 Feb 2015 01:09:05 +0100 Subject: iser-target: Remove duplicate function names The macro isert_dbg already ensures that __func__ is part of the output, so there's no reason to duplicate the function name in the format string itself. Signed-off-by: Rasmus Villemoes Signed-off-by: Nicholas Bellinger --- drivers/infiniband/ulp/isert/ib_isert.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) (limited to 'drivers/infiniband') diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c index 1d31ffb5d789..da8c860e71c1 100644 --- a/drivers/infiniband/ulp/isert/ib_isert.c +++ b/drivers/infiniband/ulp/isert/ib_isert.c @@ -949,7 +949,7 @@ isert_post_recv(struct isert_conn *isert_conn, u32 count) isert_err("ib_post_recv() failed with ret: %d\n", ret); isert_conn->post_recv_buf_count -= count; } else { - isert_dbg("isert_post_recv(): Posted %d RX buffers\n", count); + isert_dbg("Posted %d RX buffers\n", count); isert_conn->conn_rx_desc_head = rx_head; } return ret; @@ -1711,8 +1711,7 @@ isert_put_cmd(struct isert_cmd *isert_cmd, bool comp_err) * associated cmd->se_cmd needs to be released. */ if (cmd->se_cmd.se_tfo != NULL) { - isert_dbg("Calling transport_generic_free_cmd from" - " isert_put_cmd for 0x%02x\n", + isert_dbg("Calling transport_generic_free_cmd for 0x%02x\n", cmd->iscsi_opcode); transport_generic_free_cmd(&cmd->se_cmd, 0); break; @@ -3138,7 +3137,7 @@ accept_wait: spin_lock_bh(&np->np_thread_lock); if (np->np_thread_state >= ISCSI_NP_THREAD_RESET) { spin_unlock_bh(&np->np_thread_lock); - isert_dbg("np_thread_state %d for isert_accept_np\n", + isert_dbg("np_thread_state %d\n", np->np_thread_state); /** * No point in stalling here when np_thread -- cgit v1.2.1 From e4f4e8016e6823475291eb0da7cc95d0fada2237 Mon Sep 17 00:00:00 2001 From: Sagi Grimberg Date: Mon, 9 Feb 2015 18:07:25 +0200 Subject: iscsi/iser-target: Support multi-sequence sendtargets text response In case sendtargets response is larger than initiator MRDSL, we send a partial sendtargets response (setting F=0, C=1, TTT!=0xffffffff), accept a consecutive empty text message and send the rest of the payload. In case we are done, we set F=1, C=0, TTT=0xffffffff. We do that by storing the sendtargets response bytes done under the session. This patch also makes iscsit_find_cmd_from_itt public for isert. (Re-add cmd->maxcmdsn_inc and clear in iscsit_build_text_rsp - nab) Signed-off-by: Sagi Grimberg Signed-off-by: Nicholas Bellinger --- drivers/infiniband/ulp/isert/ib_isert.c | 18 +++++++++++++++--- 1 file changed, 15 insertions(+), 3 deletions(-) (limited to 'drivers/infiniband') diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c index da8c860e71c1..075b19cc78e8 100644 --- a/drivers/infiniband/ulp/isert/ib_isert.c +++ b/drivers/infiniband/ulp/isert/ib_isert.c @@ -1436,9 +1436,15 @@ isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc, ret = iscsit_handle_logout_cmd(conn, cmd, (unsigned char *)hdr); break; case ISCSI_OP_TEXT: - cmd = isert_allocate_cmd(conn); - if (!cmd) - break; + if (be32_to_cpu(hdr->ttt) != 0xFFFFFFFF) { + cmd = iscsit_find_cmd_from_itt(conn, hdr->itt); + if (!cmd) + break; + } else { + cmd = isert_allocate_cmd(conn); + if (!cmd) + break; + } isert_cmd = iscsit_priv_cmd(cmd); ret = isert_handle_text_cmd(isert_conn, isert_cmd, cmd, @@ -1660,6 +1666,7 @@ isert_put_cmd(struct isert_cmd *isert_cmd, bool comp_err) struct isert_conn *isert_conn = isert_cmd->conn; struct iscsi_conn *conn = isert_conn->conn; struct isert_device *device = isert_conn->conn_device; + struct iscsi_text_rsp *hdr; isert_dbg("Cmd %p\n", isert_cmd); @@ -1700,6 +1707,11 @@ isert_put_cmd(struct isert_cmd *isert_cmd, bool comp_err) case ISCSI_OP_REJECT: case ISCSI_OP_NOOP_OUT: case ISCSI_OP_TEXT: + hdr = (struct iscsi_text_rsp *)&isert_cmd->tx_desc.iscsi_header; + /* If the continue bit is on, keep the command alive */ + if (hdr->flags & ISCSI_FLAG_TEXT_CONTINUE) + break; + spin_lock_bh(&conn->cmd_lock); if (!list_empty(&cmd->i_conn_node)) list_del_init(&cmd->i_conn_node); -- cgit v1.2.1