On Thu, 28 Feb 2013 19:25:32 +0400
Pavel Shilovsky <piastry@xxxxxxxxxxx> wrote:
> by passing these flags to NFSv4 open request.
>
> Signed-off-by: Pavel Shilovsky <piastry@xxxxxxxxxxx>
> ---
> fs/nfs/nfs4xdr.c | 24 ++++++++++++++++++++----
> 1 file changed, 20 insertions(+), 4 deletions(-)
>
> diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
> index 26b1439..58ddc74 100644
> --- a/fs/nfs/nfs4xdr.c
> +++ b/fs/nfs/nfs4xdr.c
> @@ -1325,7 +1325,8 @@ static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struc
> encode_string(xdr, name->len, name->name);
> }
>
> -static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
> +static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode,
> + int open_flags)
> {
> __be32 *p;
>
> @@ -1343,7 +1344,22 @@ static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
> default:
> *p++ = cpu_to_be32(0);
> }
> - *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
> + if (open_flags & O_DENYMAND) {
As Bruce mentioned, I think a mount option to enable this on a per-fs
basis would be a better approach than this new O_DENYMAND flag.
> + switch (open_flags & (O_DENYREAD|O_DENYWRITE)) {
> + case O_DENYREAD:
> + *p = cpu_to_be32(NFS4_SHARE_DENY_READ);
> + break;
> + case O_DENYWRITE:
> + *p = cpu_to_be32(NFS4_SHARE_DENY_WRITE);
> + break;
> + case O_DENYREAD|O_DENYWRITE:
> + *p = cpu_to_be32(NFS4_SHARE_DENY_BOTH);
> + break;
> + default:
> + *p = cpu_to_be32(0);
> + }
> + } else
> + *p = cpu_to_be32(0);
> }
>
> static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
> @@ -1354,7 +1370,7 @@ static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_opena
> * owner 4 = 32
> */
> encode_nfs4_seqid(xdr, arg->seqid);
> - encode_share_access(xdr, arg->fmode);
> + encode_share_access(xdr, arg->fmode, arg->open_flags);
> p = reserve_space(xdr, 36);
> p = xdr_encode_hyper(p, arg->clientid);
> *p++ = cpu_to_be32(24);
> @@ -1491,7 +1507,7 @@ static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_close
> encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
> encode_nfs4_stateid(xdr, arg->stateid);
> encode_nfs4_seqid(xdr, arg->seqid);
> - encode_share_access(xdr, arg->fmode);
> + encode_share_access(xdr, arg->fmode, 0);
> }
>
> static void
Other than that, this seems reasonable.
Acked-by: Jeff Layton <jlayton@xxxxxxxxxx>
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