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| author | Trond Myklebust <trond.myklebust@primarydata.com> | 2017-05-09 22:47:15 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-04-13 20:47:53 +0300 |
| commit | fca22d52b70fe72d9b8f55177ccc01ea743aa76a (patch) | |
| tree | ec6a67479e0c8d3601dc7ae5b484b4214395f6df | |
| parent | 408719afbc61e388b1dc311d96a85e5d5e6e8f39 (diff) | |
| download | linux-fca22d52b70fe72d9b8f55177ccc01ea743aa76a.tar.xz | |
NFSv4.1: Work around a Linux server bug...
[ Upstream commit f4b23de3dda1536590787c9e5c3d16b8738ab108 ]
It turns out the Linux server has a bug in its implementation of
supattr_exclcreat; it returns the set of all attributes, whether
or not they are supported by minor version 1.
In order to avoid a regression, we therefore apply the supported_attrs
as a mask on top of whatever the server sent us.
Reported-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/nfs/nfs4proc.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index d0d2a5e980aa..1b1b616a6171 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -3300,6 +3300,7 @@ static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *f .rpc_resp = &res, }; int status; + int i; bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_FH_EXPIRE_TYPE | @@ -3365,8 +3366,13 @@ static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *f server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; server->cache_consistency_bitmask[2] = 0; + + /* Avoid a regression due to buggy server */ + for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++) + res.exclcreat_bitmask[i] &= res.attr_bitmask[i]; memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask, sizeof(server->exclcreat_bitmask)); + server->acl_bitmask = res.acl_bitmask; server->fh_expire_type = res.fh_expire_type; } |