Merge branch 'perf/core' into perf/uprobes

Merge in latest upstream (and the latest perf development tree),
to prepare for tooling changes, and also to pick up v3.4 MM
changes that the uprobes code needs to take care of.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 16 insertions, 28 deletions

diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index 44262908def5..8b1d5e62ed40 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -23,6 +23,7 @@
 #include <linux/crypto.h>
 #include <linux/completion.h>
 #include <linux/module.h>
+#include <linux/idr.h>
 #include <asm/unaligned.h>
 #include <scsi/scsi_device.h>
 #include <scsi/iscsi_proto.h>
@@ -780,7 +781,7 @@ static int iscsit_alloc_buffs(struct iscsi_cmd *cmd)
 	struct scatterlist *sgl;
 	u32 length = cmd->se_cmd.data_length;
 	int nents = DIV_ROUND_UP(length, PAGE_SIZE);
-	int i = 0, ret;
+	int i = 0, j = 0, ret;
 	/*
 	 * If no SCSI payload is present, allocate the default iovecs used for
 	 * iSCSI PDU Header
@@ -821,17 +822,15 @@ static int iscsit_alloc_buffs(struct iscsi_cmd *cmd)
 	 */
         ret = iscsit_allocate_iovecs(cmd);
         if (ret < 0)
-		goto page_alloc_failed;
+		return -ENOMEM;
 
 	return 0;
 
 page_alloc_failed:
-	while (i >= 0) {
-		__free_page(sg_page(&sgl[i]));
-		i--;
-	}
-	kfree(cmd->t_mem_sg);
-	cmd->t_mem_sg = NULL;
+	while (j < i)
+		__free_page(sg_page(&sgl[j++]));
+
+	kfree(sgl);
 	return -ENOMEM;
 }
 
@@ -1006,8 +1005,8 @@ done:
 	/*
 	 * The CDB is going to an se_device_t.
 	 */
-	ret = iscsit_get_lun_for_cmd(cmd, hdr->cdb,
-				get_unaligned_le64(&hdr->lun));
+	ret = transport_lookup_cmd_lun(&cmd->se_cmd,
+				       scsilun_to_int(&hdr->lun));
 	if (ret < 0) {
 		if (cmd->se_cmd.scsi_sense_reason == TCM_NON_EXISTENT_LUN) {
 			pr_debug("Responding to non-acl'ed,"
@@ -1028,7 +1027,7 @@ done:
 		return iscsit_add_reject_from_cmd(
 				ISCSI_REASON_BOOKMARK_NO_RESOURCES,
 				1, 1, buf, cmd);
-	} else if (transport_ret == -EINVAL) {
+	} else if (transport_ret < 0) {
 		/*
 		 * Unsupported SAM Opcode.  CHECK_CONDITION will be sent
 		 * in iscsit_execute_cmd() during the CmdSN OOO Execution
@@ -1363,7 +1362,7 @@ static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf)
 		 * outstanding_r2ts reaches zero, go ahead and send the delayed
 		 * TASK_ABORTED status.
 		 */
-		if (atomic_read(&se_cmd->t_transport_aborted) != 0) {
+		if (se_cmd->transport_state & CMD_T_ABORTED) {
 			if (hdr->flags & ISCSI_FLAG_CMD_FINAL)
 				if (--cmd->outstanding_r2ts < 1) {
 					iscsit_stop_dataout_timer(cmd);
@@ -1471,14 +1470,12 @@ static int iscsit_handle_nop_out(
 	unsigned char *ping_data = NULL;
 	int cmdsn_ret, niov = 0, ret = 0, rx_got, rx_size;
 	u32 checksum, data_crc, padding = 0, payload_length;
-	u64 lun;
 	struct iscsi_cmd *cmd = NULL;
 	struct kvec *iov = NULL;
 	struct iscsi_nopout *hdr;
 
 	hdr			= (struct iscsi_nopout *) buf;
 	payload_length		= ntoh24(hdr->dlength);
-	lun			= get_unaligned_le64(&hdr->lun);
 	hdr->itt		= be32_to_cpu(hdr->itt);
 	hdr->ttt		= be32_to_cpu(hdr->ttt);
 	hdr->cmdsn		= be32_to_cpu(hdr->cmdsn);
@@ -1688,13 +1685,11 @@ static int iscsit_handle_task_mgt_cmd(
 	struct se_tmr_req *se_tmr;
 	struct iscsi_tmr_req *tmr_req;
 	struct iscsi_tm *hdr;
-	u32 payload_length;
 	int out_of_order_cmdsn = 0;
 	int ret;
 	u8 function;
 
 	hdr			= (struct iscsi_tm *) buf;
-	payload_length		= ntoh24(hdr->dlength);
 	hdr->itt		= be32_to_cpu(hdr->itt);
 	hdr->rtt		= be32_to_cpu(hdr->rtt);
 	hdr->cmdsn		= be32_to_cpu(hdr->cmdsn);
@@ -1746,8 +1741,8 @@ static int iscsit_handle_task_mgt_cmd(
 	 * Locate the struct se_lun for all TMRs not related to ERL=2 TASK_REASSIGN
 	 */
 	if (function != ISCSI_TM_FUNC_TASK_REASSIGN) {
-		ret = iscsit_get_lun_for_tmr(cmd,
-				get_unaligned_le64(&hdr->lun));
+		ret = transport_lookup_tmr_lun(&cmd->se_cmd,
+					       scsilun_to_int(&hdr->lun));
 		if (ret < 0) {
 			cmd->se_cmd.se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 			se_tmr->response = ISCSI_TMF_RSP_NO_LUN;
@@ -2206,14 +2201,10 @@ static int iscsit_handle_snack(
 	struct iscsi_conn *conn,
 	unsigned char *buf)
 {
-	u32 unpacked_lun;
-	u64 lun;
 	struct iscsi_snack *hdr;
 
 	hdr			= (struct iscsi_snack *) buf;
 	hdr->flags		&= ~ISCSI_FLAG_CMD_FINAL;
-	lun			= get_unaligned_le64(&hdr->lun);
-	unpacked_lun		= scsilun_to_int((struct scsi_lun *)&lun);
 	hdr->itt		= be32_to_cpu(hdr->itt);
 	hdr->ttt		= be32_to_cpu(hdr->ttt);
 	hdr->exp_statsn		= be32_to_cpu(hdr->exp_statsn);
@@ -3513,7 +3504,6 @@ int iscsi_target_tx_thread(void *arg)
 	struct iscsi_cmd *cmd = NULL;
 	struct iscsi_conn *conn;
 	struct iscsi_queue_req *qr = NULL;
-	struct se_cmd *se_cmd;
 	struct iscsi_thread_set *ts = arg;
 	/*
 	 * Allow ourselves to be interrupted by SIGINT so that a
@@ -3696,8 +3686,6 @@ check_rsp_state:
 				goto transport_err;
 			}
 
-			se_cmd = &cmd->se_cmd;
-
 			if (map_sg && !conn->conn_ops->IFMarker) {
 				if (iscsit_fe_sendpage_sg(cmd, conn) < 0) {
 					conn->tx_response_queue = 0;
@@ -4170,7 +4158,7 @@ int iscsit_close_connection(
 	if (!atomic_read(&sess->session_reinstatement) &&
 	     atomic_read(&sess->session_fall_back_to_erl0)) {
 		spin_unlock_bh(&sess->conn_lock);
-		iscsit_close_session(sess);
+		target_put_session(sess->se_sess);
 
 		return 0;
 	} else if (atomic_read(&sess->session_logout)) {
@@ -4291,7 +4279,7 @@ static void iscsit_logout_post_handler_closesession(
 	iscsit_dec_conn_usage_count(conn);
 	iscsit_stop_session(sess, 1, 1);
 	iscsit_dec_session_usage_count(sess);
-	iscsit_close_session(sess);
+	target_put_session(sess->se_sess);
 }
 
 static void iscsit_logout_post_handler_samecid(
@@ -4457,7 +4445,7 @@ int iscsit_free_session(struct iscsi_session *sess)
 	} else
 		spin_unlock_bh(&sess->conn_lock);
 
-	iscsit_close_session(sess);
+	target_put_session(sess->se_sess);
 	return 0;
 }