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nfs: we don't support removing system.nfs4_acl

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[ Upstream commit 4f8be1f53b ]

The NFSv4 protocol doesn't have any notion of reomoving an attribute, so
removexattr(path,"system.nfs4_acl") doesn't make sense.

There's no documented return value.  Arguably it could be EOPNOTSUPP but
I'm a little worried an application might take that to mean that we
don't support ACLs or xattrs.  How about EINVAL?

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
J. Bruce Fields 2021-01-28 17:36:38 -05:00 committed by Greg Kroah-Hartman
parent 3dab008e23
commit 9f70460801
1 changed files with 3 additions and 0 deletions
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3
fs/nfs/nfs4proc.c
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@ -5891,6 +5891,9 @@ static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t bufl
unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
int ret, i;
/* You can't remove system.nfs4_acl: */
if (buflen == 0)
return -EINVAL;
if (!nfs4_server_supports_acls(server))
return -EOPNOTSUPP;
if (npages > ARRAY_SIZE(pages))