1 files changed, 30 insertions, 37 deletions

diff --git a/drivers/block/rnbd/rnbd-srv.c b/drivers/block/rnbd/rnbd-srv.c
index 2cfed2e58d64..c186df0ec641 100644
--- a/drivers/block/rnbd/rnbd-srv.c
+++ b/drivers/block/rnbd/rnbd-srv.c
@@ -96,7 +96,7 @@ rnbd_get_sess_dev(int dev_id, struct rnbd_srv_session *srv_sess)
 		ret = kref_get_unless_zero(&sess_dev->kref);
 	rcu_read_unlock();
 
-	if (!sess_dev || !ret)
+	if (!ret)
 		return ERR_PTR(-ENXIO);
 
 	return sess_dev;
@@ -180,7 +180,7 @@ static void destroy_device(struct kref *kref)
 
 	WARN_ONCE(!list_empty(&dev->sess_dev_list),
 		  "Device %s is being destroyed but still in use!\n",
-		  dev->id);
+		  dev->name);
 
 	spin_lock(&dev_lock);
 	list_del(&dev->list);
@@ -219,10 +219,10 @@ void rnbd_destroy_sess_dev(struct rnbd_srv_sess_dev *sess_dev, bool keep_id)
 	rnbd_put_sess_dev(sess_dev);
 	wait_for_completion(&dc); /* wait for inflights to drop to zero */
 
-	blkdev_put(sess_dev->bdev, sess_dev->open_flags);
+	blkdev_put(sess_dev->bdev, NULL);
 	mutex_lock(&sess_dev->dev->lock);
 	list_del(&sess_dev->dev_list);
-	if (sess_dev->open_flags & FMODE_WRITE)
+	if (!sess_dev->readonly)
 		sess_dev->dev->open_write_cnt--;
 	mutex_unlock(&sess_dev->dev->lock);
 
@@ -356,7 +356,7 @@ static int process_msg_open(struct rnbd_srv_session *srv_sess,
 			    const void *msg, size_t len,
 			    void *data, size_t datalen);
 
-static int process_msg_sess_info(struct rnbd_srv_session *srv_sess,
+static void process_msg_sess_info(struct rnbd_srv_session *srv_sess,
 				 const void *msg, size_t len,
 				 void *data, size_t datalen);
 
@@ -384,8 +384,7 @@ static int rnbd_srv_rdma_ev(void *priv, struct rtrs_srv_op *id,
 		ret = process_msg_open(srv_sess, usr, usrlen, data, datalen);
 		break;
 	case RNBD_MSG_SESS_INFO:
-		ret = process_msg_sess_info(srv_sess, usr, usrlen, data,
-					    datalen);
+		process_msg_sess_info(srv_sess, usr, usrlen, data, datalen);
 		break;
 	default:
 		pr_warn("Received unexpected message type %d from session %s\n",
@@ -431,7 +430,7 @@ static struct rnbd_srv_dev *rnbd_srv_init_srv_dev(struct block_device *bdev)
 	if (!dev)
 		return ERR_PTR(-ENOMEM);
 
-	snprintf(dev->id, sizeof(dev->id), "%pg", bdev);
+	snprintf(dev->name, sizeof(dev->name), "%pg", bdev);
 	kref_init(&dev->kref);
 	INIT_LIST_HEAD(&dev->sess_dev_list);
 	mutex_init(&dev->lock);
@@ -446,7 +445,7 @@ rnbd_srv_find_or_add_srv_dev(struct rnbd_srv_dev *new_dev)
 
 	spin_lock(&dev_lock);
 	list_for_each_entry(dev, &dev_list, list) {
-		if (!strncmp(dev->id, new_dev->id, sizeof(dev->id))) {
+		if (!strncmp(dev->name, new_dev->name, sizeof(dev->name))) {
 			if (!kref_get_unless_zero(&dev->kref))
 				/*
 				 * We lost the race, device is almost dead.
@@ -467,39 +466,38 @@ static int rnbd_srv_check_update_open_perm(struct rnbd_srv_dev *srv_dev,
 					    struct rnbd_srv_session *srv_sess,
 					    enum rnbd_access_mode access_mode)
 {
-	int ret = -EPERM;
+	int ret = 0;
 
 	mutex_lock(&srv_dev->lock);
 
 	switch (access_mode) {
 	case RNBD_ACCESS_RO:
-		ret = 0;
 		break;
 	case RNBD_ACCESS_RW:
 		if (srv_dev->open_write_cnt == 0)  {
 			srv_dev->open_write_cnt++;
-			ret = 0;
 		} else {
 			pr_err("Mapping device '%s' for session %s with RW permissions failed. Device already opened as 'RW' by %d client(s), access mode %s.\n",
-			       srv_dev->id, srv_sess->sessname,
+			       srv_dev->name, srv_sess->sessname,
 			       srv_dev->open_write_cnt,
-			       rnbd_access_mode_str(access_mode));
+			       rnbd_access_modes[access_mode].str);
+			ret = -EPERM;
 		}
 		break;
 	case RNBD_ACCESS_MIGRATION:
 		if (srv_dev->open_write_cnt < 2) {
 			srv_dev->open_write_cnt++;
-			ret = 0;
 		} else {
 			pr_err("Mapping device '%s' for session %s with migration permissions failed. Device already opened as 'RW' by %d client(s), access mode %s.\n",
-			       srv_dev->id, srv_sess->sessname,
+			       srv_dev->name, srv_sess->sessname,
 			       srv_dev->open_write_cnt,
-			       rnbd_access_mode_str(access_mode));
+			       rnbd_access_modes[access_mode].str);
+			ret = -EPERM;
 		}
 		break;
 	default:
 		pr_err("Received mapping request for device '%s' on session %s with invalid access mode: %d\n",
-		       srv_dev->id, srv_sess->sessname, access_mode);
+		       srv_dev->name, srv_sess->sessname, access_mode);
 		ret = -EINVAL;
 	}
 
@@ -561,7 +559,7 @@ static void rnbd_srv_fill_msg_open_rsp(struct rnbd_msg_open_rsp *rsp,
 static struct rnbd_srv_sess_dev *
 rnbd_srv_create_set_sess_dev(struct rnbd_srv_session *srv_sess,
 			      const struct rnbd_msg_open *open_msg,
-			      struct block_device *bdev, fmode_t open_flags,
+			      struct block_device *bdev, bool readonly,
 			      struct rnbd_srv_dev *srv_dev)
 {
 	struct rnbd_srv_sess_dev *sdev = rnbd_sess_dev_alloc(srv_sess);
@@ -576,7 +574,7 @@ rnbd_srv_create_set_sess_dev(struct rnbd_srv_session *srv_sess,
 	sdev->bdev		= bdev;
 	sdev->sess		= srv_sess;
 	sdev->dev		= srv_dev;
-	sdev->open_flags	= open_flags;
+	sdev->readonly		= readonly;
 	sdev->access_mode	= open_msg->access_mode;
 
 	return sdev;
@@ -631,7 +629,7 @@ static char *rnbd_srv_get_full_path(struct rnbd_srv_session *srv_sess,
 	return full_path;
 }
 
-static int process_msg_sess_info(struct rnbd_srv_session *srv_sess,
+static void process_msg_sess_info(struct rnbd_srv_session *srv_sess,
 				 const void *msg, size_t len,
 				 void *data, size_t datalen)
 {
@@ -644,8 +642,6 @@ static int process_msg_sess_info(struct rnbd_srv_session *srv_sess,
 
 	rsp->hdr.type = cpu_to_le16(RNBD_MSG_SESS_INFO_RSP);
 	rsp->ver = srv_sess->ver;
-
-	return 0;
 }
 
 /**
@@ -681,15 +677,14 @@ static int process_msg_open(struct rnbd_srv_session *srv_sess,
 	struct rnbd_srv_sess_dev *srv_sess_dev;
 	const struct rnbd_msg_open *open_msg = msg;
 	struct block_device *bdev;
-	fmode_t open_flags;
+	blk_mode_t open_flags = BLK_OPEN_READ;
 	char *full_path;
 	struct rnbd_msg_open_rsp *rsp = data;
 
 	trace_process_msg_open(srv_sess, open_msg);
 
-	open_flags = FMODE_READ;
 	if (open_msg->access_mode != RNBD_ACCESS_RO)
-		open_flags |= FMODE_WRITE;
+		open_flags |= BLK_OPEN_WRITE;
 
 	mutex_lock(&srv_sess->lock);
 
@@ -719,7 +714,7 @@ static int process_msg_open(struct rnbd_srv_session *srv_sess,
 		goto reject;
 	}
 
-	bdev = blkdev_get_by_path(full_path, open_flags, THIS_MODULE);
+	bdev = blkdev_get_by_path(full_path, open_flags, NULL, NULL);
 	if (IS_ERR(bdev)) {
 		ret = PTR_ERR(bdev);
 		pr_err("Opening device '%s' on session %s failed, failed to open the block device, err: %d\n",
@@ -736,9 +731,9 @@ static int process_msg_open(struct rnbd_srv_session *srv_sess,
 		goto blkdev_put;
 	}
 
-	srv_sess_dev = rnbd_srv_create_set_sess_dev(srv_sess, open_msg,
-						     bdev, open_flags,
-						     srv_dev);
+	srv_sess_dev = rnbd_srv_create_set_sess_dev(srv_sess, open_msg, bdev,
+				open_msg->access_mode == RNBD_ACCESS_RO,
+				srv_dev);
 	if (IS_ERR(srv_sess_dev)) {
 		pr_err("Opening device '%s' on session %s failed, creating sess_dev failed, err: %ld\n",
 		       full_path, srv_sess->sessname, PTR_ERR(srv_sess_dev));
@@ -774,7 +769,7 @@ static int process_msg_open(struct rnbd_srv_session *srv_sess,
 	list_add(&srv_sess_dev->dev_list, &srv_dev->sess_dev_list);
 	mutex_unlock(&srv_dev->lock);
 
-	rnbd_srv_info(srv_sess_dev, "Opened device '%s'\n", srv_dev->id);
+	rnbd_srv_info(srv_sess_dev, "Opened device '%s'\n", srv_dev->name);
 
 	kfree(full_path);
 
@@ -795,7 +790,7 @@ srv_dev_put:
 	}
 	rnbd_put_srv_dev(srv_dev);
 blkdev_put:
-	blkdev_put(bdev, open_flags);
+	blkdev_put(bdev, NULL);
 free_path:
 	kfree(full_path);
 reject:
@@ -808,7 +803,7 @@ static struct rtrs_srv_ctx *rtrs_ctx;
 static struct rtrs_srv_ops rtrs_ops;
 static int __init rnbd_srv_init_module(void)
 {
-	int err;
+	int err = 0;
 
 	BUILD_BUG_ON(sizeof(struct rnbd_msg_hdr) != 4);
 	BUILD_BUG_ON(sizeof(struct rnbd_msg_sess_info) != 36);
@@ -822,19 +817,17 @@ static int __init rnbd_srv_init_module(void)
 	};
 	rtrs_ctx = rtrs_srv_open(&rtrs_ops, port_nr);
 	if (IS_ERR(rtrs_ctx)) {
-		err = PTR_ERR(rtrs_ctx);
 		pr_err("rtrs_srv_open(), err: %d\n", err);
-		return err;
+		return PTR_ERR(rtrs_ctx);
 	}
 
 	err = rnbd_srv_create_sysfs_files();
 	if (err) {
 		pr_err("rnbd_srv_create_sysfs_files(), err: %d\n", err);
 		rtrs_srv_close(rtrs_ctx);
-		return err;
 	}
 
-	return 0;
+	return err;
 }
 
 static void __exit rnbd_srv_cleanup_module(void)