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[Qemu-devel] [PATCH 1/3] nbd: Return correct error for write to read-onl
From: |
Eric Blake |
Subject: |
[Qemu-devel] [PATCH 1/3] nbd: Return correct error for write to read-only export |
Date: |
Tue, 5 Apr 2016 21:35:02 -0600 |
The NBD Protocol requires that servers should send EPERM for
attempts to write (or trim) a read-only export. We were
correct for TRIM (blk_co_discard() gave EPERM); but were
manually setting EROFS which then got mapped to EINVAL over
the wire on writes.
Signed-off-by: Eric Blake <address@hidden>
---
nbd/server.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/nbd/server.c b/nbd/server.c
index b95571b..98e3957 100644
--- a/nbd/server.c
+++ b/nbd/server.c
@@ -26,6 +26,7 @@ static int system_errno_to_nbd_errno(int err)
case 0:
return NBD_SUCCESS;
case EPERM:
+ case EROFS:
return NBD_EPERM;
case EIO:
return NBD_EIO;
--
2.5.5