diff options
Diffstat (limited to 'net/sunrpc/svc.c')
| -rw-r--r-- | net/sunrpc/svc.c | 68 |
1 files changed, 54 insertions, 14 deletions
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c index fea7ce8fba14..79967b6925bd 100644 --- a/net/sunrpc/svc.c +++ b/net/sunrpc/svc.c @@ -649,6 +649,8 @@ svc_rqst_alloc(struct svc_serv *serv, struct svc_pool *pool, int node) if (!rqstp) return rqstp; + pagevec_init(&rqstp->rq_pvec); + __set_bit(RQ_BUSY, &rqstp->rq_flags); rqstp->rq_server = serv; rqstp->rq_pool = pool; @@ -842,9 +844,21 @@ EXPORT_SYMBOL_GPL(svc_set_num_threads); * * When replacing a page in rq_pages, batch the release of the * replaced pages to avoid hammering the page allocator. + * + * Return values: + * %true: page replaced + * %false: array bounds checking failed */ -void svc_rqst_replace_page(struct svc_rqst *rqstp, struct page *page) +bool svc_rqst_replace_page(struct svc_rqst *rqstp, struct page *page) { + struct page **begin = rqstp->rq_pages; + struct page **end = &rqstp->rq_pages[RPCSVC_MAXPAGES]; + + if (unlikely(rqstp->rq_next_page < begin || rqstp->rq_next_page > end)) { + trace_svc_replace_page_err(rqstp); + return false; + } + if (*rqstp->rq_next_page) { if (!pagevec_space(&rqstp->rq_pvec)) __pagevec_release(&rqstp->rq_pvec); @@ -853,9 +867,28 @@ void svc_rqst_replace_page(struct svc_rqst *rqstp, struct page *page) get_page(page); *(rqstp->rq_next_page++) = page; + return true; } EXPORT_SYMBOL_GPL(svc_rqst_replace_page); +/** + * svc_rqst_release_pages - Release Reply buffer pages + * @rqstp: RPC transaction context + * + * Release response pages that might still be in flight after + * svc_send, and any spliced filesystem-owned pages. + */ +void svc_rqst_release_pages(struct svc_rqst *rqstp) +{ + int i, count = rqstp->rq_next_page - rqstp->rq_respages; + + if (count) { + release_pages(rqstp->rq_respages, count); + for (i = 0; i < count; i++) + rqstp->rq_respages[i] = NULL; + } +} + /* * Called from a server thread as it's exiting. Caller must hold the "service * mutex" for the service. @@ -863,6 +896,7 @@ EXPORT_SYMBOL_GPL(svc_rqst_replace_page); void svc_rqst_free(struct svc_rqst *rqstp) { + pagevec_release(&rqstp->rq_pvec); svc_release_buffer(rqstp); if (rqstp->rq_scratch_page) put_page(rqstp->rq_scratch_page); @@ -1018,7 +1052,7 @@ static int __svc_register(struct net *net, const char *progname, #endif } - trace_svc_register(progname, version, protocol, port, family, error); + trace_svc_register(progname, version, family, protocol, port, error); return error; } @@ -1382,7 +1416,7 @@ err_bad_rpc: /* Only RPCv2 supported */ xdr_stream_encode_u32(xdr, RPC_VERSION); xdr_stream_encode_u32(xdr, RPC_VERSION); - goto sendit; + return 1; /* don't wrap */ err_bad_auth: dprintk("svc: authentication failed (%d)\n", @@ -1398,7 +1432,7 @@ err_bad_auth: err_bad_prog: dprintk("svc: unknown program %d\n", rqstp->rq_prog); serv->sv_stats->rpcbadfmt++; - xdr_stream_encode_u32(xdr, RPC_PROG_UNAVAIL); + *rqstp->rq_accept_statp = rpc_prog_unavail; goto sendit; err_bad_vers: @@ -1406,7 +1440,12 @@ err_bad_vers: rqstp->rq_vers, rqstp->rq_prog, progp->pg_name); serv->sv_stats->rpcbadfmt++; - xdr_stream_encode_u32(xdr, RPC_PROG_MISMATCH); + *rqstp->rq_accept_statp = rpc_prog_mismatch; + + /* + * svc_authenticate() has already added the verifier and + * advanced the stream just past rq_accept_statp. + */ xdr_stream_encode_u32(xdr, process.mismatch.lovers); xdr_stream_encode_u32(xdr, process.mismatch.hivers); goto sendit; @@ -1415,27 +1454,28 @@ err_bad_proc: svc_printk(rqstp, "unknown procedure (%d)\n", rqstp->rq_proc); serv->sv_stats->rpcbadfmt++; - xdr_stream_encode_u32(xdr, RPC_PROC_UNAVAIL); + *rqstp->rq_accept_statp = rpc_proc_unavail; goto sendit; err_garbage_args: svc_printk(rqstp, "failed to decode RPC header\n"); serv->sv_stats->rpcbadfmt++; - xdr_stream_encode_u32(xdr, RPC_GARBAGE_ARGS); + *rqstp->rq_accept_statp = rpc_garbage_args; goto sendit; err_system_err: serv->sv_stats->rpcbadfmt++; - xdr_stream_encode_u32(xdr, RPC_SYSTEM_ERR); + *rqstp->rq_accept_statp = rpc_system_err; goto sendit; } -/* - * Process the RPC request. +/** + * svc_process - Execute one RPC transaction + * @rqstp: RPC transaction context + * */ -int -svc_process(struct svc_rqst *rqstp) +void svc_process(struct svc_rqst *rqstp) { struct kvec *resv = &rqstp->rq_res.head[0]; __be32 *p; @@ -1471,7 +1511,8 @@ svc_process(struct svc_rqst *rqstp) if (!svc_process_common(rqstp)) goto out_drop; - return svc_send(rqstp); + svc_send(rqstp); + return; out_baddir: svc_printk(rqstp, "bad direction 0x%08x, dropping request\n", @@ -1479,7 +1520,6 @@ out_baddir: rqstp->rq_server->sv_stats->rpcbadfmt++; out_drop: svc_drop(rqstp); - return 0; } EXPORT_SYMBOL_GPL(svc_process); |