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SUNRPC: Clean up generic dispatcher code

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Simplify the generic server dispatcher.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Trond Myklebust 2019-04-09 11:46:16 -04:00 committed by J. Bruce Fields
parent 8e5b67731d
commit 4532608d71
1 changed files with 47 additions and 28 deletions
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75
net/sunrpc/svc.c
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@ -1160,6 +1160,45 @@ svc_get_autherr(struct svc_rqst *rqstp, __be32 *statp)
return rpc_auth_ok;
}
static int
svc_generic_dispatch(struct svc_rqst *rqstp, __be32 *statp)
{
struct kvec *argv = &rqstp->rq_arg.head[0];
struct kvec *resv = &rqstp->rq_res.head[0];
const struct svc_procedure *procp = rqstp->rq_procinfo;
/*
* Decode arguments
* XXX: why do we ignore the return value?
*/
if (procp->pc_decode &&
!procp->pc_decode(rqstp, argv->iov_base)) {
*statp = rpc_garbage_args;
return 1;
}
*statp = procp->pc_func(rqstp);
if (*statp == rpc_drop_reply ||
test_bit(RQ_DROPME, &rqstp->rq_flags))
return 0;
if (test_bit(RQ_AUTHERR, &rqstp->rq_flags))
return 1;
if (*statp != rpc_success)
return 1;
/* Encode reply */
if (procp->pc_encode &&
!procp->pc_encode(rqstp, resv->iov_base + resv->iov_len)) {
dprintk("svc: failed to encode reply\n");
/* serv->sv_stats->rpcsystemerr++; */
*statp = rpc_system_err;
}
return 1;
}
__be32
svc_generic_init_request(struct svc_rqst *rqstp,
const struct svc_program *progp,
@ -1328,40 +1367,17 @@ svc_process_common(struct svc_rqst *rqstp, struct kvec *argv, struct kvec *resv)
/* Call the function that processes the request. */
if (!process.dispatch) {
/*
* Decode arguments
* XXX: why do we ignore the return value?
*/
if (procp->pc_decode &&
!procp->pc_decode(rqstp, argv->iov_base))
if (!svc_generic_dispatch(rqstp, statp))
goto release_dropit;
if (*statp == rpc_garbage_args)
goto err_garbage;
*statp = procp->pc_func(rqstp);
/* Encode reply */
if (*statp == rpc_drop_reply ||
test_bit(RQ_DROPME, &rqstp->rq_flags)) {
if (procp->pc_release)
procp->pc_release(rqstp);
goto dropit;
}
auth_stat = svc_get_autherr(rqstp, statp);
if (auth_stat != rpc_auth_ok)
goto err_release_bad_auth;
if (*statp == rpc_success && procp->pc_encode &&
!procp->pc_encode(rqstp, resv->iov_base + resv->iov_len)) {
dprintk("svc: failed to encode reply\n");
/* serv->sv_stats->rpcsystemerr++; */
*statp = rpc_system_err;
}
} else {
dprintk("svc: calling dispatcher\n");
if (!process.dispatch(rqstp, statp)) {
/* Release reply info */
if (procp->pc_release)
procp->pc_release(rqstp);
goto dropit;
}
if (!process.dispatch(rqstp, statp))
goto release_dropit; /* Release reply info */
}
/* Check RPC status result */
@ -1380,6 +1396,9 @@ svc_process_common(struct svc_rqst *rqstp, struct kvec *argv, struct kvec *resv)
goto close;
return 1; /* Caller can now send it */
release_dropit:
if (procp->pc_release)
procp->pc_release(rqstp);
dropit:
svc_authorise(rqstp); /* doesn't hurt to call this twice */
dprintk("svc: svc_process dropit\n");