linux-kernel - [PATCH] knfsd: fix spurious EINVAL errors on first access of new filesystem

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Message-Id: <1194901503-23105-2-git-send-email-bfields@citi.umich.edu>
Date:	Mon, 12 Nov 2007 16:05:02 -0500
From:	"J. Bruce Fields" <bfields@...i.umich.edu>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	nfs@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
	Neil Brown <neilb@...e.de>, stable@...nel.org,
	"J. Bruce Fields" <bfields@...i.umich.edu>, Roland <devzero@....de>
Subject: [PATCH] knfsd: fix spurious EINVAL errors on first access of new filesystem

The v2/v3 acl code in nfsd is translating any return from fh_verify() to
nfserr_inval.  This is particularly unfortunate in the case of an
nfserr_dropit return, which is an internal error meant to indicate to
callers that this request has been deferred and should just be dropped
pending the results of an upcall to mountd.

Thanks to Roland <devzero@....de> for bug report and data collection.

Cc: Roland <devzero@....de>
Acked-by: Andreas Gruenbacher <agruen@...e.de>
Signed-off-by: J. Bruce Fields <bfields@...i.umich.edu>
---
 fs/nfsd/nfs2acl.c |    2 +-
 fs/nfsd/nfs3acl.c |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/nfsd/nfs2acl.c b/fs/nfsd/nfs2acl.c
index b617428..0e5fa11 100644
--- a/fs/nfsd/nfs2acl.c
+++ b/fs/nfsd/nfs2acl.c
@@ -41,7 +41,7 @@ static __be32 nfsacld_proc_getacl(struct svc_rqst * rqstp,
 
 	fh = fh_copy(&resp->fh, &argp->fh);
 	if ((nfserr = fh_verify(rqstp, &resp->fh, 0, MAY_NOP)))
-		RETURN_STATUS(nfserr_inval);
+		RETURN_STATUS(nfserr);
 
 	if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT))
 		RETURN_STATUS(nfserr_inval);
diff --git a/fs/nfsd/nfs3acl.c b/fs/nfsd/nfs3acl.c
index 3e3f2de..b647f2f 100644
--- a/fs/nfsd/nfs3acl.c
+++ b/fs/nfsd/nfs3acl.c
@@ -37,7 +37,7 @@ static __be32 nfsd3_proc_getacl(struct svc_rqst * rqstp,
 
 	fh = fh_copy(&resp->fh, &argp->fh);
 	if ((nfserr = fh_verify(rqstp, &resp->fh, 0, MAY_NOP)))
-		RETURN_STATUS(nfserr_inval);
+		RETURN_STATUS(nfserr);
 
 	if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT))
 		RETURN_STATUS(nfserr_inval);
-- 
1.5.3.5.561.g140d

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