Messages in this thread | | | Date | Mon, 11 Mar 2013 14:54:34 -0400 | From | Jeff Layton <> | Subject | Re: [PATCH v3 6/7] NFSv4: Add O_DENY* open flags support |
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On Thu, 28 Feb 2013 19:25:32 +0400 Pavel Shilovsky <piastry@etersoft.ru> wrote:
> by passing these flags to NFSv4 open request. > > Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru> > --- > 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@redhat.com>
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