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Sun, 5 Jul 2020 18:52:18 +0000 (GMT) From: Kanchan Joshi To: axboe@kernel.dk, viro@zeniv.linux.org.uk, bcrl@kvack.org Cc: hch@infradead.org, Damien.LeMoal@wdc.com, asml.silence@gmail.com, linux-fsdevel@vger.kernel.org, mb@lightnvm.io, linux-kernel@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-block@vger.kernel.org, Kanchan Joshi , Selvakumar S , Nitesh Shetty , Javier Gonzalez Subject: [PATCH v3 3/4] block: enable zone-append for iov_iter of bvec type Date: Mon, 6 Jul 2020 00:17:49 +0530 Message-Id: <1593974870-18919-4-git-send-email-joshi.k@samsung.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1593974870-18919-1-git-send-email-joshi.k@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrAKsWRmVeSWpSXmKPExsWy7bCmhm6aIlO8wbHpPBa/p09htZizahuj xeq7/WwWXf+2sFi0tn9jsjg9YRGTxbvWcywWj+98Zrc4+v8tm8WUaU2MFntvaVvs2XuSxeLy rjlsFiu2H2Gx2PZ7PrPFlSmLmC1e/zjJZnH+73FWByGPnbPusntsXqHlcflsqcemT5PYPbqv /mD06NuyitHj8yY5j/YD3Uwem568ZQrgjOKySUnNySxLLdK3S+DK+HB2KXPBC4GKRTd/sDUw vuftYuTkkBAwkeh5f4Wli5GLQ0hgN6NE14MeZgjnE6PE990vGSGcb4wS11b8ZYVpebCphw0i sZdR4vCOh1DOZ0aJS83NQFUcHGwCmhIXJpeCmCICNhI7l6iAlDALtDNLXDt5CWyQsIC3xPXl TYwgNouAqsSjmdfBbF4BZ4n5m38wQyyTk7h5rhPM5hRwkWjbfRrsPAmBLRwS1yf3sEMUuUhc ODUT6jphiVfHt0DFpSRe9rdB2cUSv+4chWruYJS43jCTBSJhL3Fxz18mkEuZgY5ev0sfJMws wCfR+/sJWFhCgFeio00IolpR4t6kp1CrxCUezlgCZXtIdLw9DLZKSGA6o8S9izYTGGVnIQxd wMi4ilEytaA4Nz212LTAKC+1XK84Mbe4NC9dLzk/dxMjOBFpee1gfPjgg94hRiYOxkOMEhzM SiK8vdqM8UK8KYmVValF+fFFpTmpxYcYpTlYlMR5lX6ciRMSSE8sSc1OTS1ILYLJMnFwSjUw mS3oz3sXoDTvb+bCHFa/5bEZP2dMX1A/LbjnhW4+8+pG+1W//4ZrRKlt3RR3cs25V69O2nr9 rxAQrz30S03xd0jw3Exf7dfSccsi9zWX2k6J4Y4szplyvnpWXINegqiVVcXll+63g2YITU/S /Gz078BD8a3n6hsU6m8u/jpnxltZjemG9YFfLh99ZORww5OzYbWkkExkpcP8YG3DVYnaU9Q9 woX7q0xeWpz3+B1ZFRYvV5Mpd+tAZ5uk52Lxo07vbS7uFBXYkf/cyyD1jNF7hbMSEyO2ZHiw mO/vOPe1smLp9Cd5Vy86+aQYBjqfDrnyYauHYPlT2fRFRwVW3z/39X5qzmOVqOPCXee2hP9U YinOSDTUYi4qTgQATTmlBrMDAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrLLMWRmVeSWpSXmKPExsWy7bCSvG6KIlO8wcwfNha/p09htZizahuj xeq7/WwWXf+2sFi0tn9jsjg9YRGTxbvWcywWj+98Zrc4+v8tm8WUaU2MFntvaVvs2XuSxeLy rjlsFiu2H2Gx2PZ7PrPFlSmLmC1e/zjJZnH+73FWByGPnbPusntsXqHlcflsqcemT5PYPbqv /mD06NuyitHj8yY5j/YD3Uwem568ZQrgjOKySUnNySxLLdK3S+DK+HB2KXPBC4GKRTd/sDUw vuftYuTkkBAwkXiwqYcNxBYS2M0o0bFEEiIuLtF87Qc7hC0ssfLfcyCbC6jmI6PE+VlTmboY OTjYBDQlLkwuBakREXCQ6Dr+mAmkhllgKrPE3OYDYEOFBbwlri9vYgSxWQRUJR7NvA5m8wo4 S8zf/IMZYoGcxM1znWA2p4CLRNvu08wg84WAaqZeUpzAyLeAkWEVo2RqQXFuem6xYYFhXmq5 XnFibnFpXrpecn7uJkZwDGhp7mDcvuqD3iFGJg7GQ4wSHMxKIry92ozxQrwpiZVVqUX58UWl OanFhxilOViUxHlvFC6MExJITyxJzU5NLUgtgskycXBKNTBJcRnavZt3fq1B85q0RSuN/zU0 HxO/NnuOaWSi6kYtRU/lNOW6fg/+1YYznGX/JL9a7ziN8frEiQcCUiYJNkWuWvE01TY7QXz5 37kWujLsm9vSmd4GBy9yDK+aMq/17faqJbv/Kgf8vO5efi1mQ7PslnzNoqx50V6i32xPTdD0 qaq7sujT3yc/E3NXM+a9fWn371WepNTaRUWZ/cc7c1id7Ly4P2d9WLdKxSH5nf6v5fPmuvz5 X/tPO78t+6zksTO7vgo17EkuajNs/BfyhvXlKV2dKoWNyxbt/v1LPqfKkWU757P37BVyBs1N t0R8ZFxP6bvt+i5zXjx8be0pezlDQebowxszz9bviWuZMluJpTgj0VCLuag4EQCG1RVp8AIA AA== X-CMS-MailID: 20200705185221epcas5p28b6d060df829b751109265222285da0e X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" CMS-TYPE: 105P X-CMS-RootMailID: 20200705185221epcas5p28b6d060df829b751109265222285da0e References: <1593974870-18919-1-git-send-email-joshi.k@samsung.com> Sender: io-uring-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: io-uring@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