linux-kernel - [PATCH v3 01/18] nvmet-fcloop: remove nport from list on last user

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Message-Id: <20250318-nvmet-fcloop-v3-1-05fec0fc02f6@kernel.org>
Date: Tue, 18 Mar 2025 11:39:55 +0100
From: Daniel Wagner <wagi@...nel.org>
To: James Smart <james.smart@...adcom.com>, Christoph Hellwig <hch@....de>, 
 Sagi Grimberg <sagi@...mberg.me>, Chaitanya Kulkarni <kch@...dia.com>
Cc: Hannes Reinecke <hare@...e.de>, Keith Busch <kbusch@...nel.org>, 
 linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Daniel Wagner <wagi@...nel.org>
Subject: [PATCH v3 01/18] nvmet-fcloop: remove nport from list on last user

The nport object has an association with the rport and lport object,
that means we can only remove an nport object from the global nport_list
after the last user of an rport or lport is gone.

Reviewed-by: Hannes Reinecke <hare@...e.de>
Reviewed-by: Christoph Hellwig <hch@....de>
Signed-off-by: Daniel Wagner <wagi@...nel.org>
---
 drivers/nvme/target/fcloop.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/nvme/target/fcloop.c b/drivers/nvme/target/fcloop.c
index 3390215b1c1f040001985a0d33741e57f1f80cb3..09546c3161fd9828234e58641de3e53519e27824 100644
--- a/drivers/nvme/target/fcloop.c
+++ b/drivers/nvme/target/fcloop.c
@@ -1004,6 +1004,11 @@ fcloop_nport_free(struct kref *ref)
 {
 	struct fcloop_nport *nport =
 		container_of(ref, struct fcloop_nport, ref);
+	unsigned long flags;
+
+	spin_lock_irqsave(&fcloop_lock, flags);
+	list_del(&nport->nport_list);
+	spin_unlock_irqrestore(&fcloop_lock, flags);
 
 	kfree(nport);
 }
@@ -1362,8 +1367,6 @@ __unlink_remote_port(struct fcloop_nport *nport)
 		nport->tport->remoteport = NULL;
 	nport->rport = NULL;
 
-	list_del(&nport->nport_list);
-
 	return rport;
 }
 

-- 
2.48.1