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authorTrond Myklebust <trondmy@gmail.com>2019-04-09 11:46:16 -0400
committerJ. Bruce Fields <bfields@redhat.com>2019-04-24 09:46:34 -0400
commit4532608d71c8ed6049c949a667eeed719cb9291d (patch)
tree5d678aa0b8fba37dc7bcb6738066f1f2dc9a2ec8
parentSUNRPC: Add a callback to initialise server requests (diff)
downloadlinux-dev-4532608d71c8ed6049c949a667eeed719cb9291d.tar.xz
linux-dev-4532608d71c8ed6049c949a667eeed719cb9291d.zip
SUNRPC: Clean up generic dispatcher code
Simplify the generic server dispatcher. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
-rw-r--r--net/sunrpc/svc.c75
1 files changed, 47 insertions, 28 deletions
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index 69f3b9e015ce..791c8076793f 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -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");