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Thu, 26 Mar 2026 06:48:56 -0400 X-MC-Unique: NVW6woi9PzuY_nXMvCratw-1 X-Mimecast-MFC-AGG-ID: NVW6woi9PzuY_nXMvCratw_1774522133 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 31466195608B; Thu, 26 Mar 2026 10:48:53 +0000 (UTC) Received: from warthog.procyon.org.com (unknown [10.44.33.121]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 4F81F3000223; Thu, 26 Mar 2026 10:48:46 +0000 (UTC) From: David Howells To: Christian Brauner , Matthew Wilcox , Christoph Hellwig Cc: David Howells , Paulo Alcantara , Jens Axboe , Leon Romanovsky , Steve French , ChenXiaoSong , Marc Dionne , Eric Van Hensbergen , Dominique Martinet , Ilya Dryomov , Trond Myklebust , netfs@lists.linux.dev, linux-afs@lists.infradead.org, linux-cifs@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, v9fs@lists.linux.dev, linux-erofs@lists.ozlabs.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Paulo Alcantara , Shyam Prasad N , Tom Talpey Subject: [PATCH 19/26] cifs: Remove support for ITER_KVEC/BVEC/FOLIOQ from smb_extract_iter_to_rdma() Date: Thu, 26 Mar 2026 10:45:34 +0000 Message-ID: <20260326104544.509518-20-dhowells@redhat.com> In-Reply-To: <20260326104544.509518-1-dhowells@redhat.com> References: <20260326104544.509518-1-dhowells@redhat.com> X-Mailing-List: linux-erofs@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 X-Mimecast-MFC-PROC-ID: Qq5fcAgfFv_wVrb66LrmSePNcxKxLGkKENrnFJ_h6n0_1774522133 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit content-type: text/plain; charset="US-ASCII"; x-default=true netfslib now only presents an bvecq queue and an associated ITER_BVECQ iterator to the filesystem, so it isn't going to see ITER_KVEC, ITER_BVEC or ITER_FOLIOQ iterators. So remove that code. Signed-off-by: David Howells cc: Steve French cc: Paulo Alcantara cc: Shyam Prasad N cc: Tom Talpey cc: linux-cifs@vger.kernel.org cc: netfs@lists.linux.dev cc: linux-fsdevel@vger.kernel.org --- fs/smb/client/smbdirect.c | 165 -------------------------------------- 1 file changed, 165 deletions(-) diff --git a/fs/smb/client/smbdirect.c b/fs/smb/client/smbdirect.c index f8a6be83db98..d9e026d5e9f9 100644 --- a/fs/smb/client/smbdirect.c +++ b/fs/smb/client/smbdirect.c @@ -3142,162 +3142,6 @@ static bool smb_set_sge(struct smb_extract_to_rdma *rdma, return true; } -/* - * Extract page fragments from a BVEC-class iterator and add them to an RDMA - * element list. The pages are not pinned. - */ -static ssize_t smb_extract_bvec_to_rdma(struct iov_iter *iter, - struct smb_extract_to_rdma *rdma, - ssize_t maxsize) -{ - const struct bio_vec *bv = iter->bvec; - unsigned long start = iter->iov_offset; - unsigned int i; - ssize_t ret = 0; - - for (i = 0; i < iter->nr_segs; i++) { - size_t off, len; - - len = bv[i].bv_len; - if (start >= len) { - start -= len; - continue; - } - - len = min_t(size_t, maxsize, len - start); - off = bv[i].bv_offset + start; - - if (!smb_set_sge(rdma, bv[i].bv_page, off, len)) - return -EIO; - - ret += len; - maxsize -= len; - if (rdma->nr_sge >= rdma->max_sge || maxsize <= 0) - break; - start = 0; - } - - if (ret > 0) - iov_iter_advance(iter, ret); - return ret; -} - -/* - * Extract fragments from a KVEC-class iterator and add them to an RDMA list. - * This can deal with vmalloc'd buffers as well as kmalloc'd or static buffers. - * The pages are not pinned. - */ -static ssize_t smb_extract_kvec_to_rdma(struct iov_iter *iter, - struct smb_extract_to_rdma *rdma, - ssize_t maxsize) -{ - const struct kvec *kv = iter->kvec; - unsigned long start = iter->iov_offset; - unsigned int i; - ssize_t ret = 0; - - for (i = 0; i < iter->nr_segs; i++) { - struct page *page; - unsigned long kaddr; - size_t off, len, seg; - - len = kv[i].iov_len; - if (start >= len) { - start -= len; - continue; - } - - kaddr = (unsigned long)kv[i].iov_base + start; - off = kaddr & ~PAGE_MASK; - len = min_t(size_t, maxsize, len - start); - kaddr &= PAGE_MASK; - - maxsize -= len; - do { - seg = min_t(size_t, len, PAGE_SIZE - off); - - if (is_vmalloc_or_module_addr((void *)kaddr)) - page = vmalloc_to_page((void *)kaddr); - else - page = virt_to_page((void *)kaddr); - - if (!smb_set_sge(rdma, page, off, seg)) - return -EIO; - - ret += seg; - len -= seg; - kaddr += PAGE_SIZE; - off = 0; - } while (len > 0 && rdma->nr_sge < rdma->max_sge); - - if (rdma->nr_sge >= rdma->max_sge || maxsize <= 0) - break; - start = 0; - } - - if (ret > 0) - iov_iter_advance(iter, ret); - return ret; -} - -/* - * Extract folio fragments from a FOLIOQ-class iterator and add them to an RDMA - * list. The folios are not pinned. - */ -static ssize_t smb_extract_folioq_to_rdma(struct iov_iter *iter, - struct smb_extract_to_rdma *rdma, - ssize_t maxsize) -{ - const struct folio_queue *folioq = iter->folioq; - unsigned int slot = iter->folioq_slot; - ssize_t ret = 0; - size_t offset = iter->iov_offset; - - BUG_ON(!folioq); - - if (slot >= folioq_nr_slots(folioq)) { - folioq = folioq->next; - if (WARN_ON_ONCE(!folioq)) - return -EIO; - slot = 0; - } - - do { - struct folio *folio = folioq_folio(folioq, slot); - size_t fsize = folioq_folio_size(folioq, slot); - - if (offset < fsize) { - size_t part = umin(maxsize, fsize - offset); - - if (!smb_set_sge(rdma, folio_page(folio, 0), offset, part)) - return -EIO; - - offset += part; - ret += part; - maxsize -= part; - } - - if (offset >= fsize) { - offset = 0; - slot++; - if (slot >= folioq_nr_slots(folioq)) { - if (!folioq->next) { - WARN_ON_ONCE(ret < iter->count); - break; - } - folioq = folioq->next; - slot = 0; - } - } - } while (rdma->nr_sge < rdma->max_sge && maxsize > 0); - - iter->folioq = folioq; - iter->folioq_slot = slot; - iter->iov_offset = offset; - iter->count -= ret; - return ret; -} - /* * Extract memory fragments from a BVECQ-class iterator and add them to an RDMA * list. The folios are not pinned. @@ -3373,15 +3217,6 @@ static ssize_t smb_extract_iter_to_rdma(struct iov_iter *iter, size_t len, int before = rdma->nr_sge; switch (iov_iter_type(iter)) { - case ITER_BVEC: - ret = smb_extract_bvec_to_rdma(iter, rdma, len); - break; - case ITER_KVEC: - ret = smb_extract_kvec_to_rdma(iter, rdma, len); - break; - case ITER_FOLIOQ: - ret = smb_extract_folioq_to_rdma(iter, rdma, len); - break; case ITER_BVECQ: ret = smb_extract_bvecq_to_rdma(iter, rdma, len); break;