forked from luck/tmp_suning_uos_patched
NFSD: Update XDR encoders in NFSv4 callback client
Clean up. Remove old-style NFSv4 XDR macros in favor of the style now used in fs/nfs/nfs4xdr.c. These were forgotten during the recent nfs4xdr.c rewrite. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Tested-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Chuck Lever
Trond Myklebust
parent
3460f29a27
commit
a033db487e
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@ -50,11 +50,6 @@ enum {
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NFSPROC4_CLNT_CB_SEQUENCE,
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};
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enum nfs_cb_opnum4 {
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OP_CB_RECALL = 4,
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OP_CB_SEQUENCE = 11,
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};
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#define NFS4_MAXTAGLEN 20
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#define NFS4_enc_cb_null_sz 0
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@ -79,30 +74,6 @@ enum nfs_cb_opnum4 {
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cb_sequence_dec_sz + \
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op_dec_sz)
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/*
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* Generic encode routines from fs/nfs/nfs4xdr.c
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*/
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static inline __be32 *
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xdr_writemem(__be32 *p, const void *ptr, int nbytes)
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{
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int tmp = XDR_QUADLEN(nbytes);
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if (!tmp)
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return p;
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p[tmp-1] = 0;
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memcpy(p, ptr, nbytes);
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return p + tmp;
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}
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#define WRITE32(n) *p++ = htonl(n)
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#define WRITEMEM(ptr,nbytes) do { \
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p = xdr_writemem(p, ptr, nbytes); \
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} while (0)
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#define RESERVE_SPACE(nbytes) do { \
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p = xdr_reserve_space(xdr, nbytes); \
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if (!p) dprintk("NFSD: RESERVE_SPACE(%d) failed in function %s\n", (int) (nbytes), __func__); \
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BUG_ON(!p); \
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} while (0)
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/*
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* Generic decode routines from fs/nfs/nfs4xdr.c
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*/
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@ -197,102 +168,232 @@ nfs_cb_stat_to_errno(int stat)
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return stat;
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}
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static __be32 *xdr_encode_empty_array(__be32 *p)
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{
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*p++ = xdr_zero;
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return p;
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}
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/*
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* XDR encode
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* Encode/decode NFSv4 CB basic data types
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*
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* Basic NFSv4 callback data types are defined in section 15 of RFC
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* 3530: "Network File System (NFS) version 4 Protocol" and section
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* 20 of RFC 5661: "Network File System (NFS) Version 4 Minor Version
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* 1 Protocol"
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*/
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static void
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encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
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/*
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* nfs_cb_opnum4
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*
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* enum nfs_cb_opnum4 {
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* OP_CB_GETATTR = 3,
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* ...
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* };
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*/
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enum nfs_cb_opnum4 {
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OP_CB_GETATTR = 3,
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OP_CB_RECALL = 4,
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OP_CB_LAYOUTRECALL = 5,
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OP_CB_NOTIFY = 6,
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OP_CB_PUSH_DELEG = 7,
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OP_CB_RECALL_ANY = 8,
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OP_CB_RECALLABLE_OBJ_AVAIL = 9,
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OP_CB_RECALL_SLOT = 10,
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OP_CB_SEQUENCE = 11,
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OP_CB_WANTS_CANCELLED = 12,
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OP_CB_NOTIFY_LOCK = 13,
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OP_CB_NOTIFY_DEVICEID = 14,
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OP_CB_ILLEGAL = 10044
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};
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static void encode_nfs_cb_opnum4(struct xdr_stream *xdr, enum nfs_cb_opnum4 op)
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{
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__be32 *p;
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RESERVE_SPACE(sizeof(stateid_t));
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WRITE32(sid->si_generation);
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WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
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p = xdr_reserve_space(xdr, 4);
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*p = cpu_to_be32(op);
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}
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static void
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encode_cb_compound_hdr(struct xdr_stream *xdr, struct nfs4_cb_compound_hdr *hdr)
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/*
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* nfs_fh4
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*
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* typedef opaque nfs_fh4<NFS4_FHSIZE>;
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*/
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static void encode_nfs_fh4(struct xdr_stream *xdr, const struct knfsd_fh *fh)
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{
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u32 length = fh->fh_size;
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__be32 *p;
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BUG_ON(length > NFS4_FHSIZE);
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p = xdr_reserve_space(xdr, 4 + length);
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xdr_encode_opaque(p, &fh->fh_base, length);
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}
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/*
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* stateid4
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*
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* struct stateid4 {
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* uint32_t seqid;
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* opaque other[12];
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* };
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*/
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static void encode_stateid4(struct xdr_stream *xdr, const stateid_t *sid)
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{
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__be32 *p;
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p = xdr_reserve_space(xdr, NFS4_STATEID_SIZE);
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*p++ = cpu_to_be32(sid->si_generation);
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xdr_encode_opaque_fixed(p, &sid->si_opaque, NFS4_STATEID_OTHER_SIZE);
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}
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/*
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* sessionid4
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*
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* typedef opaque sessionid4[NFS4_SESSIONID_SIZE];
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*/
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static void encode_sessionid4(struct xdr_stream *xdr,
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const struct nfsd4_session *session)
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{
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__be32 *p;
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p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN);
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xdr_encode_opaque_fixed(p, session->se_sessionid.data,
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NFS4_MAX_SESSIONID_LEN);
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}
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/*
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* CB_COMPOUND4args
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*
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* struct CB_COMPOUND4args {
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* utf8str_cs tag;
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* uint32_t minorversion;
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* uint32_t callback_ident;
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* nfs_cb_argop4 argarray<>;
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* };
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*/
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static void encode_cb_compound4args(struct xdr_stream *xdr,
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struct nfs4_cb_compound_hdr *hdr)
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{
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__be32 * p;
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RESERVE_SPACE(16);
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WRITE32(0); /* tag length is always 0 */
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WRITE32(hdr->minorversion);
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WRITE32(hdr->ident);
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p = xdr_reserve_space(xdr, 4 + 4 + 4 + 4);
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p = xdr_encode_empty_array(p); /* empty tag */
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*p++ = cpu_to_be32(hdr->minorversion);
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*p++ = cpu_to_be32(hdr->ident);
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hdr->nops_p = p;
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WRITE32(hdr->nops);
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*p = cpu_to_be32(hdr->nops); /* argarray element count */
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}
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/*
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* Update argarray element count
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*/
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static void encode_cb_nops(struct nfs4_cb_compound_hdr *hdr)
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{
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*hdr->nops_p = htonl(hdr->nops);
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BUG_ON(hdr->nops > NFS4_MAX_BACK_CHANNEL_OPS);
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*hdr->nops_p = cpu_to_be32(hdr->nops);
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}
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static void
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encode_cb_recall(struct xdr_stream *xdr, struct nfs4_delegation *dp,
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/*
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* CB_RECALL4args
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*
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* struct CB_RECALL4args {
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* stateid4 stateid;
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* bool truncate;
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* nfs_fh4 fh;
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* };
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*/
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static void encode_cb_recall4args(struct xdr_stream *xdr,
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const struct nfs4_delegation *dp,
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struct nfs4_cb_compound_hdr *hdr)
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{
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__be32 *p;
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int len = dp->dl_fh.fh_size;
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RESERVE_SPACE(4);
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WRITE32(OP_CB_RECALL);
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encode_stateid(xdr, &dp->dl_stateid);
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RESERVE_SPACE(8 + (XDR_QUADLEN(len) << 2));
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WRITE32(0); /* truncate optimization not implemented */
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WRITE32(len);
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WRITEMEM(&dp->dl_fh.fh_base, len);
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encode_nfs_cb_opnum4(xdr, OP_CB_RECALL);
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encode_stateid4(xdr, &dp->dl_stateid);
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p = xdr_reserve_space(xdr, 4);
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*p++ = xdr_zero; /* truncate */
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encode_nfs_fh4(xdr, &dp->dl_fh);
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hdr->nops++;
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}
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static void
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encode_cb_sequence(struct xdr_stream *xdr, struct nfsd4_callback *cb,
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/*
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* CB_SEQUENCE4args
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*
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* struct CB_SEQUENCE4args {
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* sessionid4 csa_sessionid;
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* sequenceid4 csa_sequenceid;
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* slotid4 csa_slotid;
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* slotid4 csa_highest_slotid;
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* bool csa_cachethis;
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* referring_call_list4 csa_referring_call_lists<>;
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* };
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*/
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static void encode_cb_sequence4args(struct xdr_stream *xdr,
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const struct nfsd4_callback *cb,
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struct nfs4_cb_compound_hdr *hdr)
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{
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struct nfsd4_session *session = cb->cb_clp->cl_cb_session;
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__be32 *p;
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struct nfsd4_session *ses = cb->cb_clp->cl_cb_session;
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if (hdr->minorversion == 0)
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return;
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RESERVE_SPACE(1 + NFS4_MAX_SESSIONID_LEN + 20);
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encode_nfs_cb_opnum4(xdr, OP_CB_SEQUENCE);
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encode_sessionid4(xdr, session);
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p = xdr_reserve_space(xdr, 4 + 4 + 4 + 4 + 4);
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*p++ = cpu_to_be32(session->se_cb_seq_nr); /* csa_sequenceid */
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*p++ = xdr_zero; /* csa_slotid */
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*p++ = xdr_zero; /* csa_highest_slotid */
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*p++ = xdr_zero; /* csa_cachethis */
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xdr_encode_empty_array(p); /* csa_referring_call_lists */
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WRITE32(OP_CB_SEQUENCE);
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WRITEMEM(ses->se_sessionid.data, NFS4_MAX_SESSIONID_LEN);
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WRITE32(ses->se_cb_seq_nr);
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WRITE32(0); /* slotid, always 0 */
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WRITE32(0); /* highest slotid always 0 */
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WRITE32(0); /* cachethis always 0 */
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WRITE32(0); /* FIXME: support referring_call_lists */
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hdr->nops++;
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}
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static int
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nfs4_xdr_enc_cb_null(struct rpc_rqst *req, __be32 *p)
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/*
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* NFSv4.0 and NFSv4.1 XDR encode functions
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*
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* NFSv4.0 callback argument types are defined in section 15 of RFC
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* 3530: "Network File System (NFS) version 4 Protocol" and section 20
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* of RFC 5661: "Network File System (NFS) Version 4 Minor Version 1
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* Protocol".
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*/
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/*
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* NB: Without this zero space reservation, callbacks over krb5p fail
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*/
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static int nfs4_xdr_enc_cb_null(struct rpc_rqst *req, __be32 *p, void *__unused)
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{
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struct xdr_stream xdrs, *xdr = &xdrs;
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xdr_init_encode(&xdrs, &req->rq_snd_buf, p);
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RESERVE_SPACE(0);
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xdr_reserve_space(xdr, 0);
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return 0;
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}
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static int
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nfs4_xdr_enc_cb_recall(struct rpc_rqst *req, __be32 *p,
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struct nfsd4_callback *cb)
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/*
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* 20.2. Operation 4: CB_RECALL - Recall a Delegation
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*/
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static int nfs4_xdr_enc_cb_recall(struct rpc_rqst *req, __be32 *p,
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const struct nfsd4_callback *cb)
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{
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struct xdr_stream xdr;
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struct nfs4_delegation *args = cb->cb_op;
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const struct nfs4_delegation *args = cb->cb_op;
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struct nfs4_cb_compound_hdr hdr = {
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.ident = cb->cb_clp->cl_cb_ident,
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.minorversion = cb->cb_minorversion,
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};
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xdr_init_encode(&xdr, &req->rq_snd_buf, p);
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encode_cb_compound_hdr(&xdr, &hdr);
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encode_cb_sequence(&xdr, cb, &hdr);
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encode_cb_recall(&xdr, args, &hdr);
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encode_cb_compound4args(&xdr, &hdr);
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encode_cb_sequence4args(&xdr, cb, &hdr);
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encode_cb_recall4args(&xdr, args, &hdr);
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encode_cb_nops(&hdr);
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return 0;
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}
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