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Fri, 24 Jul 2020 15:53:43 +0000 (GMT) From: Kanchan Joshi To: axboe@kernel.dk, viro@zeniv.linux.org.uk, bcrl@kvack.org Cc: willy@infradead.org, hch@infradead.org, Damien.LeMoal@wdc.com, asml.silence@gmail.com, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-block@vger.kernel.org, linux-api@vger.kernel.org, Kanchan Joshi , Selvakumar S , Nitesh Shetty , Javier Gonzalez Subject: [PATCH v4 5/6] block: enable zone-append for iov_iter of bvec type Date: Fri, 24 Jul 2020 21:19:21 +0530 Message-Id: <1595605762-17010-6-git-send-email-joshi.k@samsung.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1595605762-17010-1-git-send-email-joshi.k@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrBKsWRmVeSWpSXmKPExsWy7bCmpq40t3S8wfKfhha/p09htZizahuj xeq7/WwWXf+2sFi0tn9jsjg9YRGTxbvWcywWj+98Zrc4+v8tm8WUaU2MFpu/d7BZ7L2lbbFn 70kWi8u75rBZbPs9n9niypRFzBavf5xkszj/9zirxe8fc9gchD12zrrL7rF5hZbH5bOlHps+ TWL36NuyitHj8yY5j/YD3Uwem568ZQrgiOKySUnNySxLLdK3S+DK+HB2KXPBC4GKRTd/sDUw vuftYuTkkBAwkdi+7jVbFyMXh5DAbkaJ+4fuMkE4nxglXh68CJX5zCgx7/J5ZpiWbz2zoap2 MUrMnDWLBSQBVrXwh18XIwcHm4CmxIXJpSCmiICNxM4lKiAVzALLmSXWrwXbLCzgLTH/VjMz SAmLgKrEpG5hkDCvgLPEzAk7mCA2yUncPNcJtpVTwEXiwsW7jBDxLRwSCzc5gLRKAMU3feaH CAtLvDq+hR3ClpL4/G4vG4RdLPHrzlFmkIMlBDoYJa43zGSBSNhLXNzzlwlkDjPQwet36UOE ZSWmnlrHBHExn0Tv7ydQ5/BK7JgHYytK3Jv0lBXCFpd4OGMJlO0h0XfiOCMkPKYDQ+2t+ARG uVkIGxYwMq5ilEwtKM5NTy02LTDKSy3XK07MLS7NS9dLzs/dxAhOTFpeOxgfPvigd4iRiYPx EKMEB7OSCO+Kb1LxQrwpiZVVqUX58UWlOanFhxilOViUxHmVfpyJExJITyxJzU5NLUgtgsky cXBKNTC1HdPoXGhY+Yr1zPUWX45nXfkhwRrePPZxWRmeT+rXR7y59D0q+HrHhN4jf86ttDf5 HZu57NT8NyU/llydvW5u96VCYUcGR+31ngt+f0zYIvezJmiT2SO/X2uveItNZD3GXH6B8bHQ 429Cxo1XoidsCtT6wNWz/72ix6MNBkZJtse/XF8UsZLfdPsbu8U797yN+plmVzuXSVPkssn5 jXZLDVf/+SF8d71pMes0G375R1e+TFnlefikqK5jPmvL/wL3kn/r+sW+GpuXzjm1ffLJi+LH +JV7GRj3MJ94ca1n+/cL3+dGVvIxPexg/TY5r35Cq9fjw0F2rcU5T34y6unJnRSee4LxG6eP gNBO/Z0tSizFGYmGWsxFxYkAL47hIbsDAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrDLMWRmVeSWpSXmKPExsWy7bCSnC4ni3S8wcFea4vf06ewWsxZtY3R YvXdfjaLrn9bWCxa278xWZyesIjJ4l3rORaLx3c+s1sc/f+WzWLKtCZGi83fO9gs9t7Sttiz 9ySLxeVdc9gstv2ez2xxZcoiZovXP06yWZz/e5zV4vePOWwOwh47Z91l99i8Qsvj8tlSj02f JrF79G1ZxejxeZOcR/uBbiaPTU/eMgVwRHHZpKTmZJalFunbJXBlfDi7lLnghUDFops/2BoY 3/N2MXJySAiYSHzrmc0EYgsJ7GCU2N6WBBEXl2i+9oMdwhaWWPnvOZDNBVTzkVHi+6p9zF2M HBxsApoSFyaXgtSICDhIdB1/zARSwyywnVni+5v5bCAJYQFvifm3msHqWQRUJSZ1C4OEeQWc JWZO2MEEMV9O4ua5TmYQm1PAReLCxbuMIOVCQDUXf5RPYORbwMiwilEytaA4Nz232LDAKC+1 XK84Mbe4NC9dLzk/dxMjOAK0tHYw7ln1Qe8QIxMH4yFGCQ5mJRHeFd+k4oV4UxIrq1KL8uOL SnNSiw8xSnOwKInzfp21ME5IID2xJDU7NbUgtQgmy8TBKdXAdO7O/87KJ3afM7qvsxbycwjq ZQn+OGyyzHffDFlXjVMl6+tquHeFrBDZp/D2TabkMfmbBa4ep69O/u5mL7GiWU5EnL3E0mXL F5OZeVksUy6oHSxL1LnUcmjeJNPI99wt63S1JPNCrk6e/f5qkKjsts17ZU02PrX8+uVBTGXg cb9d8rKBDgd46l2+Xo5bdfHVHBGBbwkduoE6KxJUna1blaZv+3S2bc2T2lN1Z6QXh9dxydyx 3SZhxPCCy5HPbVX338SYkpiGkEDTKDmBx7sK9sn3ClrOCl05+farFb80JMLUPqbYyibcnGlS UbjP/oDm0iBVoUyFUp0mjRteT098YX+R7Gpz9O4GixK21JNKLMUZiYZazEXFiQA38RbV7wIA AA== X-CMS-MailID: 20200724155346epcas5p2cfb383fe9904a45280c6145f4c13e1b4 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-Sendblock-Type: REQ_APPROVE CMS-TYPE: 105P X-CMS-RootMailID: 20200724155346epcas5p2cfb383fe9904a45280c6145f4c13e1b4 References: <1595605762-17010-1-git-send-email-joshi.k@samsung.com> Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org zone-append with bvec iov_iter gives WARN_ON, and returns -EINVAL. Add new helper to process such iov_iter and add pages in bio honoring zone-append specific constraints. This is used to enable zone-append with io-uring fixed-buffer. Signed-off-by: Kanchan Joshi Signed-off-by: Selvakumar S Signed-off-by: Nitesh Shetty Signed-off-by: Javier Gonzalez --- block/bio.c | 31 ++++++++++++++++++++++++++++--- 1 file changed, 28 insertions(+), 3 deletions(-) diff --git a/block/bio.c b/block/bio.c index 0cecdbc..ade9da7 100644 --- a/block/bio.c +++ b/block/bio.c @@ -975,6 +975,30 @@ static int __bio_iov_bvec_add_pages(struct bio *bio, struct iov_iter *iter) iov_iter_advance(iter, size); return 0; } +static int __bio_iov_bvec_append_add_pages(struct bio *bio, struct iov_iter *iter) +{ + const struct bio_vec *bv = iter->bvec; + unsigned int len; + size_t size; + struct request_queue *q = bio->bi_disk->queue; + unsigned int max_append_sectors = queue_max_zone_append_sectors(q); + bool same_page = false; + + if (WARN_ON_ONCE(!max_append_sectors)) + return -EINVAL; + + if (WARN_ON_ONCE(iter->iov_offset > bv->bv_len)) + return -EINVAL; + + len = min_t(size_t, bv->bv_len - iter->iov_offset, iter->count); + size = bio_add_hw_page(q, bio, bv->bv_page, len, + bv->bv_offset + iter->iov_offset, + max_append_sectors, &same_page); + if (unlikely(size != len)) + return -EINVAL; + iov_iter_advance(iter, size); + return 0; +} #define PAGE_PTRS_PER_BVEC (sizeof(struct bio_vec) / sizeof(struct page *)) @@ -1105,9 +1129,10 @@ int bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter) do { if (bio_op(bio) == REQ_OP_ZONE_APPEND) { - if (WARN_ON_ONCE(is_bvec)) - return -EINVAL; - ret = __bio_iov_append_get_pages(bio, iter); + if (is_bvec) + ret = __bio_iov_bvec_append_add_pages(bio, iter); + else + ret = __bio_iov_append_get_pages(bio, iter); } else { if (is_bvec) ret = __bio_iov_bvec_add_pages(bio, iter); -- 2.7.4