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| author | J. Bruce Fields <bfields@redhat.com> | 2021-01-28 17:36:38 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-30 14:41:39 +0200 |
| commit | a69c8d135e6673b37ce93291579ad08b95e0d179 (patch) | |
| tree | dd0bb0446063c94caf2a5e118f4912b80e9ccc8b | |
| parent | d54d0aaa05379d5cfcd6db328bf595c51e4fbc98 (diff) | |
| download | linux-rt-a69c8d135e6673b37ce93291579ad08b95e0d179.tar.gz | |
nfs: we don't support removing system.nfs4_acl
[ Upstream commit 4f8be1f53bf615102d103c0509ffa9596f65b718 ]
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>
| -rw-r--r-- | fs/nfs/nfs4proc.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 0cebe0ca03b2..94130588ebf5 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -5144,6 +5144,9 @@ 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)) |