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SUNRPC: New xdr_streams XDR encoder API
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Now that all client-side XDR encoder routines use xdr_streams, there
should be no need to support the legacy calling sequence [rpc_rqst *,
__be32 *, RPC arg *] anywhere.  We can construct an xdr_stream in the
generic RPC code, instead of in each encoder function.

Also, all the client-side encoder functions return 0 now, making a
return value superfluous.  Take this opportunity to convert them to
return void instead.

This is a refactoring change.  It should not cause different behavior.

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>
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Chuck Lever authored and Trond Myklebust committed Dec 16, 2010
1 parent 1ac7c23 commit 9f06c71
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Showing 15 changed files with 606 additions and 807 deletions.
92 changes: 39 additions & 53 deletions fs/lockd/clnt4xdr.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -385,17 +385,15 @@ static void encode_nlm4_lock(struct xdr_stream *xdr,
* struct nlm4_lock alock;
* };
*/
static int nlm4_xdr_enc_testargs(struct rpc_rqst *req, __be32 *p,
const struct nlm_args *args)
static void nlm4_xdr_enc_testargs(struct rpc_rqst *req,
struct xdr_stream *xdr,
const struct nlm_args *args)
{
const struct nlm_lock *lock = &args->lock;
struct xdr_stream xdr;

xdr_init_encode(&xdr, &req->rq_snd_buf, p);
encode_cookie(&xdr, &args->cookie);
encode_bool(&xdr, lock->fl.fl_type == F_WRLCK);
encode_nlm4_lock(&xdr, lock);
return 0;
encode_cookie(xdr, &args->cookie);
encode_bool(xdr, lock->fl.fl_type == F_WRLCK);
encode_nlm4_lock(xdr, lock);
}

/*
Expand All @@ -408,20 +406,18 @@ static int nlm4_xdr_enc_testargs(struct rpc_rqst *req, __be32 *p,
* int state;
* };
*/
static int nlm4_xdr_enc_lockargs(struct rpc_rqst *req, __be32 *p,
const struct nlm_args *args)
static void nlm4_xdr_enc_lockargs(struct rpc_rqst *req,
struct xdr_stream *xdr,
const struct nlm_args *args)
{
const struct nlm_lock *lock = &args->lock;
struct xdr_stream xdr;

xdr_init_encode(&xdr, &req->rq_snd_buf, p);
encode_cookie(&xdr, &args->cookie);
encode_bool(&xdr, args->block);
encode_bool(&xdr, lock->fl.fl_type == F_WRLCK);
encode_nlm4_lock(&xdr, lock);
encode_bool(&xdr, args->reclaim);
encode_int32(&xdr, args->state);
return 0;
encode_cookie(xdr, &args->cookie);
encode_bool(xdr, args->block);
encode_bool(xdr, lock->fl.fl_type == F_WRLCK);
encode_nlm4_lock(xdr, lock);
encode_bool(xdr, args->reclaim);
encode_int32(xdr, args->state);
}

/*
Expand All @@ -432,18 +428,16 @@ static int nlm4_xdr_enc_lockargs(struct rpc_rqst *req, __be32 *p,
* struct nlm4_lock alock;
* };
*/
static int nlm4_xdr_enc_cancargs(struct rpc_rqst *req, __be32 *p,
const struct nlm_args *args)
static void nlm4_xdr_enc_cancargs(struct rpc_rqst *req,
struct xdr_stream *xdr,
const struct nlm_args *args)
{
const struct nlm_lock *lock = &args->lock;
struct xdr_stream xdr;

xdr_init_encode(&xdr, &req->rq_snd_buf, p);
encode_cookie(&xdr, &args->cookie);
encode_bool(&xdr, args->block);
encode_bool(&xdr, lock->fl.fl_type == F_WRLCK);
encode_nlm4_lock(&xdr, lock);
return 0;
encode_cookie(xdr, &args->cookie);
encode_bool(xdr, args->block);
encode_bool(xdr, lock->fl.fl_type == F_WRLCK);
encode_nlm4_lock(xdr, lock);
}

/*
Expand All @@ -452,16 +446,14 @@ static int nlm4_xdr_enc_cancargs(struct rpc_rqst *req, __be32 *p,
* struct nlm4_lock alock;
* };
*/
static int nlm4_xdr_enc_unlockargs(struct rpc_rqst *req, __be32 *p,
const struct nlm_args *args)
static void nlm4_xdr_enc_unlockargs(struct rpc_rqst *req,
struct xdr_stream *xdr,
const struct nlm_args *args)
{
const struct nlm_lock *lock = &args->lock;
struct xdr_stream xdr;

xdr_init_encode(&xdr, &req->rq_snd_buf, p);
encode_cookie(&xdr, &args->cookie);
encode_nlm4_lock(&xdr, lock);
return 0;
encode_cookie(xdr, &args->cookie);
encode_nlm4_lock(xdr, lock);
}

/*
Expand All @@ -470,15 +462,12 @@ static int nlm4_xdr_enc_unlockargs(struct rpc_rqst *req, __be32 *p,
* nlm4_stat stat;
* };
*/
static int nlm4_xdr_enc_res(struct rpc_rqst *req, __be32 *p,
const struct nlm_res *result)
static void nlm4_xdr_enc_res(struct rpc_rqst *req,
struct xdr_stream *xdr,
const struct nlm_res *result)
{
struct xdr_stream xdr;

xdr_init_encode(&xdr, &req->rq_snd_buf, p);
encode_cookie(&xdr, &result->cookie);
encode_nlm4_stat(&xdr, result->status);
return 0;
encode_cookie(xdr, &result->cookie);
encode_nlm4_stat(xdr, result->status);
}

/*
Expand All @@ -494,17 +483,14 @@ static int nlm4_xdr_enc_res(struct rpc_rqst *req, __be32 *p,
* nlm4_testrply test_stat;
* };
*/
static int nlm4_xdr_enc_testres(struct rpc_rqst *req, __be32 *p,
const struct nlm_res *result)
static void nlm4_xdr_enc_testres(struct rpc_rqst *req,
struct xdr_stream *xdr,
const struct nlm_res *result)
{
struct xdr_stream xdr;

xdr_init_encode(&xdr, &req->rq_snd_buf, p);
encode_cookie(&xdr, &result->cookie);
encode_nlm4_stat(&xdr, result->status);
encode_cookie(xdr, &result->cookie);
encode_nlm4_stat(xdr, result->status);
if (result->status == nlm_lck_denied)
encode_nlm4_holder(&xdr, result);
return 0;
encode_nlm4_holder(xdr, result);
}


Expand Down Expand Up @@ -588,7 +574,7 @@ static int nlm4_xdr_dec_res(struct rpc_rqst *req, __be32 *p,
#define PROC(proc, argtype, restype) \
[NLMPROC_##proc] = { \
.p_proc = NLMPROC_##proc, \
.p_encode = (kxdrproc_t)nlm4_xdr_enc_##argtype, \
.p_encode = (kxdreproc_t)nlm4_xdr_enc_##argtype, \
.p_decode = (kxdrproc_t)nlm4_xdr_dec_##restype, \
.p_arglen = NLM4_##argtype##_sz, \
.p_replen = NLM4_##restype##_sz, \
Expand Down
92 changes: 39 additions & 53 deletions fs/lockd/clntxdr.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -378,17 +378,15 @@ static void encode_nlm_lock(struct xdr_stream *xdr,
* struct nlm_lock alock;
* };
*/
static int nlm_xdr_enc_testargs(struct rpc_rqst *req, __be32 *p,
const struct nlm_args *args)
static void nlm_xdr_enc_testargs(struct rpc_rqst *req,
struct xdr_stream *xdr,
const struct nlm_args *args)
{
const struct nlm_lock *lock = &args->lock;
struct xdr_stream xdr;

xdr_init_encode(&xdr, &req->rq_snd_buf, p);
encode_cookie(&xdr, &args->cookie);
encode_bool(&xdr, lock->fl.fl_type == F_WRLCK);
encode_nlm_lock(&xdr, lock);
return 0;
encode_cookie(xdr, &args->cookie);
encode_bool(xdr, lock->fl.fl_type == F_WRLCK);
encode_nlm_lock(xdr, lock);
}

/*
Expand All @@ -401,20 +399,18 @@ static int nlm_xdr_enc_testargs(struct rpc_rqst *req, __be32 *p,
* int state;
* };
*/
static int nlm_xdr_enc_lockargs(struct rpc_rqst *req, __be32 *p,
const struct nlm_args *args)
static void nlm_xdr_enc_lockargs(struct rpc_rqst *req,
struct xdr_stream *xdr,
const struct nlm_args *args)
{
const struct nlm_lock *lock = &args->lock;
struct xdr_stream xdr;

xdr_init_encode(&xdr, &req->rq_snd_buf, p);
encode_cookie(&xdr, &args->cookie);
encode_bool(&xdr, args->block);
encode_bool(&xdr, lock->fl.fl_type == F_WRLCK);
encode_nlm_lock(&xdr, lock);
encode_bool(&xdr, args->reclaim);
encode_int32(&xdr, args->state);
return 0;
encode_cookie(xdr, &args->cookie);
encode_bool(xdr, args->block);
encode_bool(xdr, lock->fl.fl_type == F_WRLCK);
encode_nlm_lock(xdr, lock);
encode_bool(xdr, args->reclaim);
encode_int32(xdr, args->state);
}

/*
Expand All @@ -425,18 +421,16 @@ static int nlm_xdr_enc_lockargs(struct rpc_rqst *req, __be32 *p,
* struct nlm_lock alock;
* };
*/
static int nlm_xdr_enc_cancargs(struct rpc_rqst *req, __be32 *p,
const struct nlm_args *args)
static void nlm_xdr_enc_cancargs(struct rpc_rqst *req,
struct xdr_stream *xdr,
const struct nlm_args *args)
{
const struct nlm_lock *lock = &args->lock;
struct xdr_stream xdr;

xdr_init_encode(&xdr, &req->rq_snd_buf, p);
encode_cookie(&xdr, &args->cookie);
encode_bool(&xdr, args->block);
encode_bool(&xdr, lock->fl.fl_type == F_WRLCK);
encode_nlm_lock(&xdr, lock);
return 0;
encode_cookie(xdr, &args->cookie);
encode_bool(xdr, args->block);
encode_bool(xdr, lock->fl.fl_type == F_WRLCK);
encode_nlm_lock(xdr, lock);
}

/*
Expand All @@ -445,16 +439,14 @@ static int nlm_xdr_enc_cancargs(struct rpc_rqst *req, __be32 *p,
* struct nlm_lock alock;
* };
*/
static int nlm_xdr_enc_unlockargs(struct rpc_rqst *req, __be32 *p,
const struct nlm_args *args)
static void nlm_xdr_enc_unlockargs(struct rpc_rqst *req,
struct xdr_stream *xdr,
const struct nlm_args *args)
{
const struct nlm_lock *lock = &args->lock;
struct xdr_stream xdr;

xdr_init_encode(&xdr, &req->rq_snd_buf, p);
encode_cookie(&xdr, &args->cookie);
encode_nlm_lock(&xdr, lock);
return 0;
encode_cookie(xdr, &args->cookie);
encode_nlm_lock(xdr, lock);
}

/*
Expand All @@ -463,15 +455,12 @@ static int nlm_xdr_enc_unlockargs(struct rpc_rqst *req, __be32 *p,
* nlm_stat stat;
* };
*/
static int nlm_xdr_enc_res(struct rpc_rqst *req, __be32 *p,
const struct nlm_res *result)
static void nlm_xdr_enc_res(struct rpc_rqst *req,
struct xdr_stream *xdr,
const struct nlm_res *result)
{
struct xdr_stream xdr;

xdr_init_encode(&xdr, &req->rq_snd_buf, p);
encode_cookie(&xdr, &result->cookie);
encode_nlm_stat(&xdr, result->status);
return 0;
encode_cookie(xdr, &result->cookie);
encode_nlm_stat(xdr, result->status);
}

/*
Expand All @@ -494,16 +483,13 @@ static void encode_nlm_testrply(struct xdr_stream *xdr,
encode_nlm_holder(xdr, result);
}

static int nlm_xdr_enc_testres(struct rpc_rqst *req, __be32 *p,
const struct nlm_res *result)
static void nlm_xdr_enc_testres(struct rpc_rqst *req,
struct xdr_stream *xdr,
const struct nlm_res *result)
{
struct xdr_stream xdr;

xdr_init_encode(&xdr, &req->rq_snd_buf, p);
encode_cookie(&xdr, &result->cookie);
encode_nlm_stat(&xdr, result->status);
encode_nlm_testrply(&xdr, result);
return 0;
encode_cookie(xdr, &result->cookie);
encode_nlm_stat(xdr, result->status);
encode_nlm_testrply(xdr, result);
}


Expand Down Expand Up @@ -586,7 +572,7 @@ static int nlm_xdr_dec_res(struct rpc_rqst *req, __be32 *p,
#define PROC(proc, argtype, restype) \
[NLMPROC_##proc] = { \
.p_proc = NLMPROC_##proc, \
.p_encode = (kxdrproc_t)nlm_xdr_enc_##argtype, \
.p_encode = (kxdreproc_t)nlm_xdr_enc_##argtype, \
.p_decode = (kxdrproc_t)nlm_xdr_dec_##restype, \
.p_arglen = NLM_##argtype##_sz, \
.p_replen = NLM_##restype##_sz, \
Expand Down
26 changes: 9 additions & 17 deletions fs/lockd/mon.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -459,25 +459,17 @@ static void encode_priv(struct xdr_stream *xdr, const struct nsm_args *argp)
xdr_encode_opaque_fixed(p, argp->priv->data, SM_PRIV_SIZE);
}

static int xdr_enc_mon(struct rpc_rqst *req, __be32 *p,
const struct nsm_args *argp)
static void nsm_xdr_enc_mon(struct rpc_rqst *req, struct xdr_stream *xdr,
const struct nsm_args *argp)
{
struct xdr_stream xdr;

xdr_init_encode(&xdr, &req->rq_snd_buf, p);
encode_mon_id(&xdr, argp);
encode_priv(&xdr, argp);
return 0;
encode_mon_id(xdr, argp);
encode_priv(xdr, argp);
}

static int xdr_enc_unmon(struct rpc_rqst *req, __be32 *p,
const struct nsm_args *argp)
static void nsm_xdr_enc_unmon(struct rpc_rqst *req, struct xdr_stream *xdr,
const struct nsm_args *argp)
{
struct xdr_stream xdr;

xdr_init_encode(&xdr, &req->rq_snd_buf, p);
encode_mon_id(&xdr, argp);
return 0;
encode_mon_id(xdr, argp);
}

static int xdr_dec_stat_res(struct rpc_rqst *rqstp, __be32 *p,
Expand Down Expand Up @@ -524,7 +516,7 @@ static int xdr_dec_stat(struct rpc_rqst *rqstp, __be32 *p,
static struct rpc_procinfo nsm_procedures[] = {
[NSMPROC_MON] = {
.p_proc = NSMPROC_MON,
.p_encode = (kxdrproc_t)xdr_enc_mon,
.p_encode = (kxdreproc_t)nsm_xdr_enc_mon,
.p_decode = (kxdrproc_t)xdr_dec_stat_res,
.p_arglen = SM_mon_sz,
.p_replen = SM_monres_sz,
Expand All @@ -533,7 +525,7 @@ static struct rpc_procinfo nsm_procedures[] = {
},
[NSMPROC_UNMON] = {
.p_proc = NSMPROC_UNMON,
.p_encode = (kxdrproc_t)xdr_enc_unmon,
.p_encode = (kxdreproc_t)nsm_xdr_enc_unmon,
.p_decode = (kxdrproc_t)xdr_dec_stat,
.p_arglen = SM_mon_id_sz,
.p_replen = SM_unmonres_sz,
Expand Down
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