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GET /api/patches/2216356/?format=api
{ "id": 2216356, "url": "http://patchwork.ozlabs.org/api/patches/2216356/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-cifs-client/patch/20260326104544.509518-18-dhowells@redhat.com/", "project": { "id": 12, "url": "http://patchwork.ozlabs.org/api/projects/12/?format=api", "name": "Linux CIFS Client", "link_name": "linux-cifs-client", "list_id": "linux-cifs.vger.kernel.org", "list_email": "linux-cifs@vger.kernel.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260326104544.509518-18-dhowells@redhat.com>", "list_archive_url": null, "date": "2026-03-26T10:45:32", "name": "[17/26] cifs: Support ITER_BVECQ in smb_extract_iter_to_rdma()", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "c0c0ab1366313d44ec071b35086e2328fc9e1268", "submitter": { "id": 59, "url": "http://patchwork.ozlabs.org/api/people/59/?format=api", "name": "David Howells", "email": "dhowells@redhat.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-cifs-client/patch/20260326104544.509518-18-dhowells@redhat.com/mbox/", "series": [ { "id": 497565, "url": "http://patchwork.ozlabs.org/api/series/497565/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-cifs-client/list/?series=497565", "date": "2026-03-26T10:45:15", "name": "netfs: Keep track of folios in a segmented bio_vec[] chain", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/497565/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2216356/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2216356/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linux-cifs+bounces-10540-incoming=patchwork.ozlabs.org@vger.kernel.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-cifs@vger.kernel.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=is25/9mA;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c04:e001:36c::12fc:5321; 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a=rsa-sha256; c=relaxed/relaxed; d=redhat.com;\n\ts=mimecast20190719; t=1774522121;\n\th=from:from:reply-to:subject:subject:date:date:message-id:message-id:\n\t to:to:cc:cc:mime-version:mime-version:\n\t content-transfer-encoding:content-transfer-encoding:\n\t in-reply-to:in-reply-to:references:references;\n\tbh=eMP9bnV0yq18QtXiFKmTkxFw+bIJoptINTzT8/zA4D0=;\n\tb=is25/9mA8eVceG/S8f6xRz38TFtnXuchqdQM+SjoTK0jYXfOcZM+V9+uecUoF9owvXUGGd\n\tCewgkyB5nKh0J15HivnIsumVsuSSvcVy5ibYsausuG19QDXM3PuZPtHalRATDcy/+0kcoX\n\tzZ3wb+CE3BRszB/LU1eQasD/CrxmP2s=", "X-MC-Unique": "a-gXVbOYNM-z_sxtwygWsw-1", "X-Mimecast-MFC-AGG-ID": "a-gXVbOYNM-z_sxtwygWsw_1774522114", "From": "David Howells <dhowells@redhat.com>", "To": "Christian Brauner <christian@brauner.io>,\n\tMatthew Wilcox <willy@infradead.org>,\n\tChristoph Hellwig <hch@infradead.org>", "Cc": "David Howells <dhowells@redhat.com>,\n\tPaulo Alcantara <pc@manguebit.com>,\n\tJens Axboe <axboe@kernel.dk>,\n\tLeon Romanovsky <leon@kernel.org>,\n\tSteve French <sfrench@samba.org>,\n\tChenXiaoSong <chenxiaosong@chenxiaosong.com>,\n\tMarc Dionne <marc.dionne@auristor.com>,\n\tEric Van Hensbergen <ericvh@kernel.org>,\n\tDominique Martinet <asmadeus@codewreck.org>,\n\tIlya Dryomov <idryomov@gmail.com>,\n\tTrond Myklebust <trondmy@kernel.org>,\n\tnetfs@lists.linux.dev,\n\tlinux-afs@lists.infradead.org,\n\tlinux-cifs@vger.kernel.org,\n\tlinux-nfs@vger.kernel.org,\n\tceph-devel@vger.kernel.org,\n\tv9fs@lists.linux.dev,\n\tlinux-erofs@lists.ozlabs.org,\n\tlinux-fsdevel@vger.kernel.org,\n\tlinux-kernel@vger.kernel.org,\n\tPaulo Alcantara <pc@manguebit.org>,\n\tShyam Prasad N <sprasad@microsoft.com>,\n\tTom Talpey <tom@talpey.com>", "Subject": "[PATCH 17/26] cifs: Support ITER_BVECQ in smb_extract_iter_to_rdma()", "Date": "Thu, 26 Mar 2026 10:45:32 +0000", "Message-ID": "<20260326104544.509518-18-dhowells@redhat.com>", "In-Reply-To": "<20260326104544.509518-1-dhowells@redhat.com>", "References": "<20260326104544.509518-1-dhowells@redhat.com>", "Precedence": "bulk", "X-Mailing-List": "linux-cifs@vger.kernel.org", "List-Id": "<linux-cifs.vger.kernel.org>", "List-Subscribe": "<mailto:linux-cifs+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:linux-cifs+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Scanned-By": "MIMEDefang 3.0 on 10.30.177.12" }, "content": "Add support for ITER_BVECQ to smb_extract_iter_to_rdma().\n\nSigned-off-by: David Howells <dhowells@redhat.com>\ncc: Paulo Alcantara <pc@manguebit.org>\ncc: Matthew Wilcox <willy@infradead.org>\ncc: Christoph Hellwig <hch@infradead.org>\ncc: Steve French <sfrench@samba.org>\ncc: Shyam Prasad N <sprasad@microsoft.com>\ncc: Tom Talpey <tom@talpey.com>\ncc: linux-cifs@vger.kernel.org\ncc: netfs@lists.linux.dev\ncc: linux-fsdevel@vger.kernel.org\n---\n fs/smb/client/smbdirect.c | 60 +++++++++++++++++++++++++++++++++++++++\n 1 file changed, 60 insertions(+)", "diff": "diff --git a/fs/smb/client/smbdirect.c b/fs/smb/client/smbdirect.c\nindex c79304012b08..f8a6be83db98 100644\n--- a/fs/smb/client/smbdirect.c\n+++ b/fs/smb/client/smbdirect.c\n@@ -3298,6 +3298,63 @@ static ssize_t smb_extract_folioq_to_rdma(struct iov_iter *iter,\n \treturn ret;\n }\n \n+/*\n+ * Extract memory fragments from a BVECQ-class iterator and add them to an RDMA\n+ * list. The folios are not pinned.\n+ */\n+static ssize_t smb_extract_bvecq_to_rdma(struct iov_iter *iter,\n+\t\t\t\t\t struct smb_extract_to_rdma *rdma,\n+\t\t\t\t\t ssize_t maxsize)\n+{\n+\tconst struct bvecq *bq = iter->bvecq;\n+\tunsigned int slot = iter->bvecq_slot;\n+\tssize_t ret = 0;\n+\tsize_t offset = iter->iov_offset;\n+\n+\tif (slot >= bq->nr_slots) {\n+\t\tbq = bq->next;\n+\t\tif (WARN_ON_ONCE(!bq))\n+\t\t\treturn -EIO;\n+\t\tslot = 0;\n+\t}\n+\n+\tdo {\n+\t\tstruct bio_vec *bv = &bq->bv[slot];\n+\t\tstruct page *page = bv->bv_page;\n+\t\tsize_t bsize = bv->bv_len;\n+\n+\t\tif (offset < bsize) {\n+\t\t\tsize_t part = umin(maxsize, bsize - offset);\n+\n+\t\t\tif (!smb_set_sge(rdma, page, bv->bv_offset + offset, part))\n+\t\t\t\treturn -EIO;\n+\n+\t\t\toffset += part;\n+\t\t\tret += part;\n+\t\t\tmaxsize -= part;\n+\t\t}\n+\n+\t\tif (offset >= bsize) {\n+\t\t\toffset = 0;\n+\t\t\tslot++;\n+\t\t\tif (slot >= bq->nr_slots) {\n+\t\t\t\tif (!bq->next) {\n+\t\t\t\t\tWARN_ON_ONCE(ret < iter->count);\n+\t\t\t\t\tbreak;\n+\t\t\t\t}\n+\t\t\t\tbq = bq->next;\n+\t\t\t\tslot = 0;\n+\t\t\t}\n+\t\t}\n+\t} while (rdma->nr_sge < rdma->max_sge && maxsize > 0);\n+\n+\titer->bvecq = bq;\n+\titer->bvecq_slot = slot;\n+\titer->iov_offset = offset;\n+\titer->count -= ret;\n+\treturn ret;\n+}\n+\n /*\n * Extract page fragments from up to the given amount of the source iterator\n * and build up an RDMA list that refers to all of those bits. The RDMA list\n@@ -3325,6 +3382,9 @@ static ssize_t smb_extract_iter_to_rdma(struct iov_iter *iter, size_t len,\n \tcase ITER_FOLIOQ:\n \t\tret = smb_extract_folioq_to_rdma(iter, rdma, len);\n \t\tbreak;\n+\tcase ITER_BVECQ:\n+\t\tret = smb_extract_bvecq_to_rdma(iter, rdma, len);\n+\t\tbreak;\n \tdefault:\n \t\tWARN_ON_ONCE(1);\n \t\treturn -EIO;\n", "prefixes": [ "17/26" ] }