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| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2013-07-17 16:43:16 -0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2013-07-17 16:54:46 -0400 |
| commit | b4a2cf76ab7c08628c62b2062dacefa496b59dfd (patch) | |
| tree | 82bf8b6f4e48f7c2533beef0587ea0395d14f79f | |
| parent | 1540c5d3cbf7670eb68a0d02611ec73e5604a91a (diff) | |
| download | linux-b4a2cf76ab7c08628c62b2062dacefa496b59dfd.tar.gz linux-b4a2cf76ab7c08628c62b2062dacefa496b59dfd.tar.bz2 linux-b4a2cf76ab7c08628c62b2062dacefa496b59dfd.zip | |
NFSv4: Fix a regression against the FreeBSD server
Technically, the Linux client is allowed by the NFSv4 spec to send
3 word bitmaps as part of an OPEN request. However, this causes the
current FreeBSD server to return NFS4ERR_ATTRNOTSUPP errors.
Fix the regression by making the Linux client use a 2 word bitmap unless
doing NFSv4.2 with labeled NFS.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| -rw-r--r-- | fs/nfs/nfs4xdr.c | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index 0abfb8466e79..c74d6168db99 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -999,6 +999,7 @@ static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, __be32 *p; __be32 *q; int len; + uint32_t bmval_len = 2; uint32_t bmval0 = 0; uint32_t bmval1 = 0; uint32_t bmval2 = 0; @@ -1010,7 +1011,7 @@ static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, * = 40 bytes, plus any contribution from variable-length fields * such as owner/group. */ - len = 20; + len = 8; /* Sigh */ if (iap->ia_valid & ATTR_SIZE) @@ -1040,8 +1041,6 @@ static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, } len += 4 + (XDR_QUADLEN(owner_grouplen) << 2); } - if (label) - len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2); if (iap->ia_valid & ATTR_ATIME_SET) len += 16; else if (iap->ia_valid & ATTR_ATIME) @@ -1050,15 +1049,22 @@ static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, len += 16; else if (iap->ia_valid & ATTR_MTIME) len += 4; + if (label) { + len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2); + bmval_len = 3; + } + + len += bmval_len << 2; p = reserve_space(xdr, len); /* * We write the bitmap length now, but leave the bitmap and the attribute * buffer length to be backfilled at the end of this routine. */ - *p++ = cpu_to_be32(3); + *p++ = cpu_to_be32(bmval_len); q = p; - p += 4; + /* Skip bitmap entries + attrlen */ + p += bmval_len + 1; if (iap->ia_valid & ATTR_SIZE) { bmval0 |= FATTR4_WORD0_SIZE; @@ -1112,10 +1118,11 @@ static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, len, ((char *)p - (char *)q) + 4); BUG(); } - len = (char *)p - (char *)q - 16; + len = (char *)p - (char *)q - (bmval_len << 2); *q++ = htonl(bmval0); *q++ = htonl(bmval1); - *q++ = htonl(bmval2); + if (bmval_len == 3) + *q++ = htonl(bmval2); *q = htonl(len); /* out: */ |