From patchwork Mon Aug 3 17:00:07 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anna Schumaker X-Patchwork-Id: 11698453 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 376D6138A for ; Mon, 3 Aug 2020 17:00:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1572420792 for ; Mon, 3 Aug 2020 17:00:21 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="WrjLjcXm" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727768AbgHCRAV (ORCPT ); Mon, 3 Aug 2020 13:00:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56490 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728150AbgHCRAU (ORCPT ); Mon, 3 Aug 2020 13:00:20 -0400 Received: from mail-il1-x142.google.com (mail-il1-x142.google.com [IPv6:2607:f8b0:4864:20::142]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 68C40C06174A for ; Mon, 3 Aug 2020 10:00:20 -0700 (PDT) Received: by mail-il1-x142.google.com with SMTP id p16so20919804ile.0 for ; Mon, 03 Aug 2020 10:00:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=SqrIKFKArlFgakLk7PZTdk3/K8f7ykmJ3escxfEQuww=; b=WrjLjcXmV8E8dsu9fJy94ZUIHnXbR3LlinlLSYVXvJZntTgbpRitAjL+ol/ounRyha dZni2ZqTBdslT++ZYyGGAQ3XCo6RysOPS9ItPvieRfKKSPOF76VQ0Bi1nbnlRM912mil jAA17DMh13ac/UtJwVeVZjdWce/lAw5tkL9u55ZuorUhuX1zOWbSBGEsys2MS/+0VN4z nvoF8C/JtTidWNBU3YA2TuTQQUknmvrQ2W1fN0qArsq1E/XthaQOjm2h1TsWGM++SPeB 74c+VnZjfBCQnO/C0F4hv9VThwkIP1OE+aqMZobn41KnxPV1CbtH+KLwYneqEeoYihA5 IdJw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-transfer-encoding; bh=SqrIKFKArlFgakLk7PZTdk3/K8f7ykmJ3escxfEQuww=; b=VUnY0+Qy93qzFirxjqajrxxuOJs/V21/0ZL6q9rFVG091ii2FF7j2la+jiFnE+TA2b jndOmYW5VNElf/ngsQG06MKqg0d4A4zES8cTRDtwRP+MHx2mbz7cu4rcdFsdBn8jXb+T rSUcehGl+baXMyWUhL1tYtNjFQfUZXEtNhs0RJdl4lSlcZu3EObnAq+iNdRdfIQ3DYWo pPwNo3IpCJpzxg89oJnhKD6neowbV3ji2r1sPb6Jk0wCLzrQwprXugQ5P0hn2XkXiZJ2 M6+b3AYpzNfsSnGz2uZ/78p/p7yKfP5HFiULw7s8n7OgtafrdGmgxFabmHMzlssSmygk VW6A== X-Gm-Message-State: AOAM530wifs0dkpaxKtVtorb4I5NDEjijjMRexw2Vuo3+o/VKaBvNpxc PD1cygv8rLnvI1qy2F+Xr66WGDKC X-Google-Smtp-Source: ABdhPJwqz60lnMYJMQpGHoTi8iwQeNOUgrQQtXST13T5YVed303XZ3bcoQMukc6Km5n9KDlrG4OG1A== X-Received: by 2002:a92:1f4f:: with SMTP id i76mr326150ile.226.1596474019376; Mon, 03 Aug 2020 10:00:19 -0700 (PDT) Received: from gouda.nowheycreamery.com (c-68-32-74-190.hsd1.mi.comcast.net. [68.32.74.190]) by smtp.gmail.com with ESMTPSA id a6sm10498040ioo.44.2020.08.03.10.00.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Aug 2020 10:00:18 -0700 (PDT) From: schumaker.anna@gmail.com X-Google-Original-From: Anna.Schumaker@Netapp.com To: linux-nfs@vger.kernel.org Cc: Anna.Schumaker@Netapp.com Subject: [PATCH v3 04/10] NFS: Add READ_PLUS data segment support Date: Mon, 3 Aug 2020 13:00:07 -0400 Message-Id: <20200803170013.1348350-5-Anna.Schumaker@Netapp.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200803170013.1348350-1-Anna.Schumaker@Netapp.com> References: <20200803170013.1348350-1-Anna.Schumaker@Netapp.com> MIME-Version: 1.0 Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: Anna Schumaker This patch adds client support for decoding a single NFS4_CONTENT_DATA segment returned by the server. This is the simplest implementation possible, since it does not account for any hole segments in the reply. Signed-off-by: Anna Schumaker --- fs/nfs/nfs42xdr.c | 140 ++++++++++++++++++++++++++++++++++++++ fs/nfs/nfs4proc.c | 43 +++++++++++- fs/nfs/nfs4xdr.c | 1 + include/linux/nfs4.h | 2 +- include/linux/nfs_fs_sb.h | 1 + include/linux/nfs_xdr.h | 2 +- 6 files changed, 184 insertions(+), 5 deletions(-) diff --git a/fs/nfs/nfs42xdr.c b/fs/nfs/nfs42xdr.c index c03f3246d6c5..9a1e18295e55 100644 --- a/fs/nfs/nfs42xdr.c +++ b/fs/nfs/nfs42xdr.c @@ -45,6 +45,15 @@ #define encode_deallocate_maxsz (op_encode_hdr_maxsz + \ encode_fallocate_maxsz) #define decode_deallocate_maxsz (op_decode_hdr_maxsz) +#define encode_read_plus_maxsz (op_encode_hdr_maxsz + \ + encode_stateid_maxsz + 3) +#define NFS42_READ_PLUS_SEGMENT_SIZE (1 /* data_content4 */ + \ + 2 /* data_info4.di_offset */ + \ + 2 /* data_info4.di_length */) +#define decode_read_plus_maxsz (op_decode_hdr_maxsz + \ + 1 /* rpr_eof */ + \ + 1 /* rpr_contents count */ + \ + NFS42_READ_PLUS_SEGMENT_SIZE) #define encode_seek_maxsz (op_encode_hdr_maxsz + \ encode_stateid_maxsz + \ 2 /* offset */ + \ @@ -128,6 +137,14 @@ decode_putfh_maxsz + \ decode_deallocate_maxsz + \ decode_getattr_maxsz) +#define NFS4_enc_read_plus_sz (compound_encode_hdr_maxsz + \ + encode_sequence_maxsz + \ + encode_putfh_maxsz + \ + encode_read_plus_maxsz) +#define NFS4_dec_read_plus_sz (compound_decode_hdr_maxsz + \ + decode_sequence_maxsz + \ + decode_putfh_maxsz + \ + decode_read_plus_maxsz) #define NFS4_enc_seek_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ @@ -252,6 +269,16 @@ static void encode_deallocate(struct xdr_stream *xdr, encode_fallocate(xdr, args); } +static void encode_read_plus(struct xdr_stream *xdr, + const struct nfs_pgio_args *args, + struct compound_hdr *hdr) +{ + encode_op_hdr(xdr, OP_READ_PLUS, decode_read_plus_maxsz, hdr); + encode_nfs4_stateid(xdr, &args->stateid); + encode_uint64(xdr, args->offset); + encode_uint32(xdr, args->count); +} + static void encode_seek(struct xdr_stream *xdr, const struct nfs42_seek_args *args, struct compound_hdr *hdr) @@ -446,6 +473,28 @@ static void nfs4_xdr_enc_deallocate(struct rpc_rqst *req, encode_nops(&hdr); } +/* + * Encode READ_PLUS request + */ +static void nfs4_xdr_enc_read_plus(struct rpc_rqst *req, + struct xdr_stream *xdr, + const void *data) +{ + const struct nfs_pgio_args *args = data; + struct compound_hdr hdr = { + .minorversion = nfs4_xdr_minorversion(&args->seq_args), + }; + + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_read_plus(xdr, args, &hdr); + + rpc_prepare_reply_pages(req, args->pages, args->pgbase, + args->count, hdr.replen); + encode_nops(&hdr); +} + /* * Encode SEEK request */ @@ -694,6 +743,70 @@ static int decode_deallocate(struct xdr_stream *xdr, struct nfs42_falloc_res *re return decode_op_hdr(xdr, OP_DEALLOCATE); } +static int decode_read_plus_data(struct xdr_stream *xdr, struct nfs_pgio_res *res, + uint32_t *eof) +{ + uint32_t count, recvd; + uint64_t offset; + __be32 *p; + + p = xdr_inline_decode(xdr, 8 + 4); + if (unlikely(!p)) + return -EIO; + + p = xdr_decode_hyper(p, &offset); + count = be32_to_cpup(p); + recvd = xdr_read_pages(xdr, count); + if (count > recvd) { + dprintk("NFS: server cheating in read reply: " + "count %u > recvd %u\n", count, recvd); + count = recvd; + *eof = 0; + } + + res->count += count; + return 0; +} + +static int decode_read_plus(struct xdr_stream *xdr, struct nfs_pgio_res *res) +{ + uint32_t eof, segments, type; + int status; + __be32 *p; + + status = decode_op_hdr(xdr, OP_READ_PLUS); + if (status) + return status; + + p = xdr_inline_decode(xdr, 4 + 4); + if (unlikely(!p)) + return -EIO; + + eof = be32_to_cpup(p++); + segments = be32_to_cpup(p++); + if (segments == 0) + goto out; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + return -EIO; + + type = be32_to_cpup(p++); + if (type == NFS4_CONTENT_DATA) + status = decode_read_plus_data(xdr, res, &eof); + else + return -EINVAL; + + if (status) + return status; + if (segments > 1) + eof = 0; + +out: + res->eof = eof; + return 0; +} + static int decode_seek(struct xdr_stream *xdr, struct nfs42_seek_res *res) { int status; @@ -870,6 +983,33 @@ static int nfs4_xdr_dec_deallocate(struct rpc_rqst *rqstp, return status; } +/* + * Decode READ_PLUS request + */ +static int nfs4_xdr_dec_read_plus(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + void *data) +{ + struct nfs_pgio_res *res = data; + struct compound_hdr hdr; + int status; + + status = decode_compound_hdr(xdr, &hdr); + if (status) + goto out; + status = decode_sequence(xdr, &res->seq_res, rqstp); + if (status) + goto out; + status = decode_putfh(xdr); + if (status) + goto out; + status = decode_read_plus(xdr, res); + if (!status) + status = res->count; +out: + return status; +} + /* * Decode SEEK request */ diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 2e2dac29a9e9..509198eb968e 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -69,6 +69,10 @@ #include "nfs4trace.h" +#ifdef CONFIG_NFS_V4_2 +#include "nfs42.h" +#endif /* CONFIG_NFS_V4_2 */ + #define NFSDBG_FACILITY NFSDBG_PROC #define NFS4_BITMASK_SZ 3 @@ -5226,28 +5230,60 @@ static bool nfs4_read_stateid_changed(struct rpc_task *task, return true; } +static bool nfs4_read_plus_not_supported(struct rpc_task *task, + struct nfs_pgio_header *hdr) +{ + struct nfs_server *server = NFS_SERVER(hdr->inode); + struct rpc_message *msg = &task->tk_msg; + + if (msg->rpc_proc == &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS] && + server->caps & NFS_CAP_READ_PLUS && task->tk_status == -ENOTSUPP) { + server->caps &= ~NFS_CAP_READ_PLUS; + msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; + rpc_restart_call_prepare(task); + return true; + } + return false; +} + static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) { - dprintk("--> %s\n", __func__); if (!nfs4_sequence_done(task, &hdr->res.seq_res)) return -EAGAIN; if (nfs4_read_stateid_changed(task, &hdr->args)) return -EAGAIN; + if (nfs4_read_plus_not_supported(task, hdr)) + return -EAGAIN; if (task->tk_status > 0) nfs_invalidate_atime(hdr->inode); return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : nfs4_read_done_cb(task, hdr); } +#ifdef CONFIG_NFS_V4_2 +static void nfs42_read_plus_support(struct nfs_server *server, struct rpc_message *msg) +{ + if (server->caps & NFS_CAP_READ_PLUS) + msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS]; + else + msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; +} +#else +static void nfs42_read_plus_support(struct nfs_server *server, struct rpc_message *msg) +{ + msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; +} +#endif /* CONFIG_NFS_V4_2 */ + static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr, struct rpc_message *msg) { hdr->timestamp = jiffies; if (!hdr->pgio_done_cb) hdr->pgio_done_cb = nfs4_read_done_cb; - msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; + nfs42_read_plus_support(NFS_SERVER(hdr->inode), msg); nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); } @@ -10006,7 +10042,8 @@ static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { | NFS_CAP_SEEK | NFS_CAP_LAYOUTSTATS | NFS_CAP_CLONE - | NFS_CAP_LAYOUTERROR, + | NFS_CAP_LAYOUTERROR + | NFS_CAP_READ_PLUS, .init_client = nfs41_init_client, .shutdown_client = nfs41_shutdown_client, .match_stateid = nfs41_match_stateid, diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index 6742646d4feb..80d9d55a48c2 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -7580,6 +7580,7 @@ const struct rpc_procinfo nfs4_procedures[] = { PROC42(COPY_NOTIFY, enc_copy_notify, dec_copy_notify), PROC(LOOKUPP, enc_lookupp, dec_lookupp), PROC42(LAYOUTERROR, enc_layouterror, dec_layouterror), + PROC42(READ_PLUS, enc_read_plus, dec_read_plus), }; static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)]; diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h index 4dba3c948932..4bf75b56758c 100644 --- a/include/linux/nfs4.h +++ b/include/linux/nfs4.h @@ -540,8 +540,8 @@ enum { NFSPROC4_CLNT_LOOKUPP, NFSPROC4_CLNT_LAYOUTERROR, - NFSPROC4_CLNT_COPY_NOTIFY, + NFSPROC4_CLNT_READ_PLUS, }; /* nfs41 types */ diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h index 465fa98258a3..11248c5a7b24 100644 --- a/include/linux/nfs_fs_sb.h +++ b/include/linux/nfs_fs_sb.h @@ -281,5 +281,6 @@ struct nfs_server { #define NFS_CAP_OFFLOAD_CANCEL (1U << 25) #define NFS_CAP_LAYOUTERROR (1U << 26) #define NFS_CAP_COPY_NOTIFY (1U << 27) +#define NFS_CAP_READ_PLUS (1U << 28) #endif diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h index 5fd0a9ef425f..6da54d010421 100644 --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h @@ -656,7 +656,7 @@ struct nfs_pgio_args { struct nfs_pgio_res { struct nfs4_sequence_res seq_res; struct nfs_fattr * fattr; - __u32 count; + __u64 count; __u32 op_status; union { struct {