Patch "NFSv4.1/pnfs: Ensure we handle the error NFS4ERR_RETURNCONFLICT" has been added to the 6.6-stable tree

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This is a note to let you know that I've just added the patch titled

    NFSv4.1/pnfs: Ensure we handle the error NFS4ERR_RETURNCONFLICT

to the 6.6-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     nfsv4.1-pnfs-ensure-we-handle-the-error-nfs4err_retu.patch
and it can be found in the queue-6.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 207942f42421b442fd1105ca7c72cf5fadc1c517
Author: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
Date:   Wed Nov 15 13:55:29 2023 -0500

    NFSv4.1/pnfs: Ensure we handle the error NFS4ERR_RETURNCONFLICT
    
    [ Upstream commit 037e56a22ff37f9a9c2330b66cff55d3d1ff9b90 ]
    
    Once the client has processed the CB_LAYOUTRECALL, but has not yet
    successfully returned the layout, the server is supposed to switch to
    returning NFS4ERR_RETURNCONFLICT. This patch ensures that we handle
    that return value correctly.
    
    Fixes: 183d9e7b112a ("pnfs: rework LAYOUTGET retry handling")
    Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
    Signed-off-by: Anna Schumaker <Anna.Schumaker@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 0ff913b4e9e0..e8b52e36906c 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -170,6 +170,7 @@ static int nfs4_map_errors(int err)
 	case -NFS4ERR_RESOURCE:
 	case -NFS4ERR_LAYOUTTRYLATER:
 	case -NFS4ERR_RECALLCONFLICT:
+	case -NFS4ERR_RETURNCONFLICT:
 		return -EREMOTEIO;
 	case -NFS4ERR_WRONGSEC:
 	case -NFS4ERR_WRONG_CRED:
@@ -558,6 +559,7 @@ static int nfs4_do_handle_exception(struct nfs_server *server,
 		case -NFS4ERR_GRACE:
 		case -NFS4ERR_LAYOUTTRYLATER:
 		case -NFS4ERR_RECALLCONFLICT:
+		case -NFS4ERR_RETURNCONFLICT:
 			exception->delay = 1;
 			return 0;
 
@@ -9662,6 +9664,7 @@ nfs4_layoutget_handle_exception(struct rpc_task *task,
 		status = -EBUSY;
 		break;
 	case -NFS4ERR_RECALLCONFLICT:
+	case -NFS4ERR_RETURNCONFLICT:
 		status = -ERECALLCONFLICT;
 		break;
 	case -NFS4ERR_DELEG_REVOKED:




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