linux-kernel - [PATCH] afs: Return -EAGAIN, not -EREMOTEIO, when a file already locked

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Date:   Tue, 06 Sep 2022 22:09:11 +0100
From:   David Howells <dhowells@...hat.com>
To:     torvalds@...ux-foundation.org
Cc:     dhowells@...hat.com, marc.dionne@...istor.com,
        jaltman@...istor.com, linux-afs@...ts.infradead.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] afs: Return -EAGAIN, not -EREMOTEIO, when a file already locked

Hi Linus,

Can you apply this please?

Thanks,
David
---
afs: Return -EAGAIN, not -EREMOTEIO, when a file already locked

When trying to get a file lock on an AFS file, the server may return
UAEAGAIN to indicate that the lock is already held.  This is currently
translated by the default path to -EREMOTEIO.  Translate it instead to
-EAGAIN so that we know we can retry it.

Signed-off-by: David Howells <dhowells@...hat.com>
Reviewed-by: Jeffrey E Altman <jaltman@...istor.com>
cc: Marc Dionne <marc.dionne@...istor.com>
cc: linux-afs@...ts.infradead.org
Link: https://lore.kernel.org/r/166075761334.3533338.2591992675160918098.stgit@warthog.procyon.org.uk/
---
 fs/afs/misc.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/afs/misc.c b/fs/afs/misc.c
index 933e67fcdab1..805328ca5428 100644
--- a/fs/afs/misc.c
+++ b/fs/afs/misc.c
@@ -69,6 +69,7 @@ int afs_abort_to_error(u32 abort_code)
 		/* Unified AFS error table */
 	case UAEPERM:			return -EPERM;
 	case UAENOENT:			return -ENOENT;
+	case UAEAGAIN:			return -EAGAIN;
 	case UAEACCES:			return -EACCES;
 	case UAEBUSY:			return -EBUSY;
 	case UAEEXIST:			return -EEXIST;