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nfsd: plumb in a CB_NOTIFY_LOCK operation

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Add the encoding/decoding for CB_NOTIFY_LOCK operations.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Jeff Layton 2016-09-16 16:28:23 -04:00 committed by J. Bruce Fields
parent 1eca45f8a8
commit a188620ebd
3 changed files with 73 additions and 0 deletions
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57
fs/nfsd/nfs4callback.c
View File

@ -623,6 +623,62 @@ static int nfs4_xdr_dec_cb_layout(struct rpc_rqst *rqstp,
}
#endif /* CONFIG_NFSD_PNFS */
static void encode_stateowner(struct xdr_stream *xdr, struct nfs4_stateowner *so)
{
__be32 *p;
p = xdr_reserve_space(xdr, 8 + 4 + so->so_owner.len);
p = xdr_encode_opaque_fixed(p, &so->so_client->cl_clientid, 8);
xdr_encode_opaque(p, so->so_owner.data, so->so_owner.len);
}
static void nfs4_xdr_enc_cb_notify_lock(struct rpc_rqst *req,
struct xdr_stream *xdr,
const struct nfsd4_callback *cb)
{
const struct nfsd4_blocked_lock *nbl =
container_of(cb, struct nfsd4_blocked_lock, nbl_cb);
struct nfs4_lockowner *lo = (struct nfs4_lockowner *)nbl->nbl_lock.fl_owner;
struct nfs4_cb_compound_hdr hdr = {
.ident = 0,
.minorversion = cb->cb_clp->cl_minorversion,
};
__be32 *p;
BUG_ON(hdr.minorversion == 0);
encode_cb_compound4args(xdr, &hdr);
encode_cb_sequence4args(xdr, cb, &hdr);
p = xdr_reserve_space(xdr, 4);
*p = cpu_to_be32(OP_CB_NOTIFY_LOCK);
encode_nfs_fh4(xdr, &nbl->nbl_fh);
encode_stateowner(xdr, &lo->lo_owner);
hdr.nops++;
encode_cb_nops(&hdr);
}
static int nfs4_xdr_dec_cb_notify_lock(struct rpc_rqst *rqstp,
struct xdr_stream *xdr,
struct nfsd4_callback *cb)
{
struct nfs4_cb_compound_hdr hdr;
int status;
status = decode_cb_compound4res(xdr, &hdr);
if (unlikely(status))
return status;
if (cb) {
status = decode_cb_sequence4res(xdr, cb);
if (unlikely(status || cb->cb_seq_status))
return status;
}
return decode_cb_op_status(xdr, OP_CB_NOTIFY_LOCK, &cb->cb_status);
}
/*
* RPC procedure tables
*/
@ -643,6 +699,7 @@ static struct rpc_procinfo nfs4_cb_procedures[] = {
#ifdef CONFIG_NFSD_PNFS
PROC(CB_LAYOUT, COMPOUND, cb_layout, cb_layout),
#endif
PROC(CB_NOTIFY_LOCK, COMPOUND, cb_notify_lock, cb_notify_lock),
};
static struct rpc_version nfs_cb_version4 = {

7
fs/nfsd/state.h
View File

@ -571,6 +571,7 @@ enum nfsd4_cb_op {
NFSPROC4_CLNT_CB_RECALL,
NFSPROC4_CLNT_CB_LAYOUT,
NFSPROC4_CLNT_CB_SEQUENCE,
NFSPROC4_CLNT_CB_NOTIFY_LOCK,
};
/* Returns true iff a is later than b: */
@ -579,6 +580,12 @@ static inline bool nfsd4_stateid_generation_after(stateid_t *a, stateid_t *b)
return (s32)(a->si_generation - b->si_generation) > 0;
}
struct nfsd4_blocked_lock {
struct file_lock nbl_lock;
struct knfsd_fh nbl_fh;
struct nfsd4_callback nbl_cb;
};
struct nfsd4_compound_state;
struct nfsd_net;

9
fs/nfsd/xdr4cb.h
View File

@ -28,3 +28,12 @@
#define NFS4_dec_cb_layout_sz (cb_compound_dec_hdr_sz + \
cb_sequence_dec_sz + \
op_dec_sz)
#define NFS4_enc_cb_notify_lock_sz (cb_compound_enc_hdr_sz + \
cb_sequence_enc_sz + \
2 + 1 + \
XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
enc_nfs4_fh_sz)
#define NFS4_dec_cb_notify_lock_sz (cb_compound_dec_hdr_sz + \
cb_sequence_dec_sz + \
op_dec_sz)