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Tue, 11 Apr 2023 17:19:42 +0900 (KST) Received: from epsmtrp1.samsung.com (unknown [182.195.40.13]) by epcas5p2.samsung.com (KnoxPortal) with ESMTPA id 20230411081342epcas5p22a4c587babd6a373cfa709d9609f65f4~U0z2KF_911873318733epcas5p2C; Tue, 11 Apr 2023 08:13:42 +0000 (GMT) Received: from epsmgms1p2.samsung.com (unknown [182.195.42.42]) by epsmtrp1.samsung.com (KnoxPortal) with ESMTP id 20230411081342epsmtrp165a97aca7b9f744fe5e1ac9e658333dc~U0z2HYLTt1918219182epsmtrp1T; Tue, 11 Apr 2023 08:13:42 +0000 (GMT) X-AuditID: b6c32a4b-7fbff70000002703-5d-6435181e2d29 Received: from epsmtip2.samsung.com ( [182.195.34.31]) by epsmgms1p2.samsung.com (Symantec Messaging Gateway) with SMTP id 4A.FD.08609.5B615346; Tue, 11 Apr 2023 17:13:42 +0900 (KST) Received: from green5.sa.corp.samsungelectronics.net (unknown [107.110.206.5]) by epsmtip2.samsung.com (KnoxPortal) with ESMTPA id 20230411081338epsmtip254352bf2c68432e6e66ec343cd492f17~U0zyW-oCI2386223862epsmtip2T; Tue, 11 Apr 2023 08:13:37 +0000 (GMT) From: Anuj Gupta To: Jens Axboe , Alasdair Kergon , Mike Snitzer , dm-devel@redhat.com, Keith Busch , Christoph Hellwig , Sagi Grimberg , James Smart , Chaitanya Kulkarni , Alexander Viro , Christian Brauner Cc: bvanassche@acm.org, hare@suse.de, ming.lei@redhat.com, dlemoal@kernel.org, anuj20.g@samsung.com, joshi.k@samsung.com, nitheshshetty@gmail.com, gost.dev@samsung.com, Nitesh Shetty , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, linux-fsdevel@vger.kernel.org Subject: [PATCH v9 7/9] dm: Add support for copy offload Date: Tue, 11 Apr 2023 13:40:34 +0530 Message-Id: <20230411081041.5328-8-anuj20.g@samsung.com> X-Mailer: git-send-email 2.35.1.500.gb896f729e2 In-Reply-To: <20230411081041.5328-1-anuj20.g@samsung.com> MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA02Te0zTVxTHc3+/8mshKSkg2wUcdl0IAQRaWsoFAcl0+kvYli5mD0kca+gv lEcf6WPKyBAhPETkUdBAYbzHAmw4ChIEioaXFoPMoU1kMhnSoGOAIkQIICu0bP73Oed+z/2e c24uA3ctpHsykuQaSiUXp3IIJ1r3kJ9voDcMlXAXSv3RtbFRHGWVbOOobbqYQAtDKwBdfbGB o5mbR5FxqcoBPbp1A0P9DToMtbSNYKiv/iWGRnYWCaQbNANkeajHkHEqAPUbTTQ02VtNoNpm Cx0NlmVjqGfuAkDdm7U4al9YpqE7U15oYvu2QwwkJx/Ekvon4wR5Qz9NJyf+7KCRk+Na0tB6 kSA7m86TfY8yCfJy9hJBLg88JMiirlZAdt5NJ18ZvEnD3CImco5LiZRSYgmlYlPyBIUkSZ4Y xYk9FX8sPlTI5QXywlEYhy0Xy6gozvGPRYEnklKtG+CwvxWnaq0pkVit5gRHR6oUWg3FlirU migOpZSkKgXKILVYptbKE4PklCaCx+WGhFqF36RI51vqgPKp57l7Dfm0TDDrXgAcGZAlgI39 r0EBcGK4svoA7FlsxG3BCoD3LR10W/AKQHPJG3y/pKW8gLAd9AL4uvmxXZWNwbH1sj0VwfKF w/M5excfYOXi8KXlIm03wFm/Y3Cra3lP5cZC8A9DDX2XaSwfqNus32OmNZ+1U2H1YFj9gmHx E5fdtCMrHG79kE/YJC7QVDlH22WcdQhmX6+yt1frCCfKP7fxcdi+cMXBxm7w79tddBt7wufF uXZOhOuTFszGSpg9OgBsfBTmjBXjuy3gLD94rTfYln4PXhlrx2y2zvDy5py9lAl7avaZA/Na qu0MofFepp1JOD72o32/hQAO360DJYCtf2sc/Vvj6P+3rgN4K/CglGpZIqUOVfLl1Nn/njlB ITOAvW/hH9sDZmdeBA0CjAEGAWTgnAPMtR2+xJUpEad9R6kU8SptKqUeBKHWdZfinu4JCuu/ kmvieYJwrkAoFArC+UIe512mb5QpwZWVKNZQKRSlpFT7dRjD0TMTy7iZPntm2Xzy/cPsIw61 t76mzqokHZEzRc3HHie7Vw7FO05GbZ8Y4eeMrDYItCerYngtSvPzhW0vXd5qepylMV/oKnBL ykxLkM0MdKw+2OHxL60tf2ZuE/nFBjr7pFXi2s7DF6i1S3e2RoimkI+CTn0ljT6vypuqPXOw YqN7RVfE/cL7YENAtCmLbzkkW6molpm6yqZLRXlvapoCMlSn/zLyTsvjNvuXPtkq73lWXubh nszI4jwN1xjDvIaPuCRvlGb88v2Q9JzH5gemyJ/DIr4Uad8pkcy3job8thFjqE+bzv3QSee3 XvTp+n3zs5+md9JH1/+5Wni9jNnZ+SsZ4VPD59DUUjHPH1epxf8C1XKlyJ8EAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrEIsWRmVeSWpSXmKPExsWy7bCSvO42MdMUg+mfmCzWnzrGbNE04S+z xeq7/WwWrw9/YrSY9uEns8WD/fYWe9/NZrW4eWAnk8WeRZOYLFauPspksXvhRyaLo//fsllM OnSN0eLp1VlMFntvaVvs2XuSxeLyrjlsFvOXPWW3ODS5mclix5NGRottv+czW6x7/Z7F4sQt aYvzf4+zOkh4XL7i7THr/lk2j52z7rJ7nL+3kcXj8tlSj02rOtk8Ni+p99h9s4HNo7f5HZvH +31X2Tz6tqxi9Nh8utrj8yY5j01P3jIF8EVx2aSk5mSWpRbp2yVwZTxfuYCx4LFUxblFHSwN jI9Euxg5OSQETCRWTuli62Lk4hAS2MEocetVAwtEQkLi1MtljBC2sMTKf8/ZIYoamSTmzWxn BkmwCahLHHneygiSEBGYwCxx6X4D2ChmgQdMEueff2EFqRIWsJC4vWkeO4jNIqAqMen3QjCb Fyje9H8GUAMH0Ap9if77giBhTgFLiT9zO8DCQkAlS/awQFQLSpyc+QTMZhaQl2jeOpt5AqPA LCSpWUhSCxiZVjFKphYU56bnFhsWGOWllusVJ+YWl+al6yXn525iBEezltYOxj2rPugdYmTi YDzEKMHBrCTC+/W/cYoQb0piZVVqUX58UWlOavEhRmkOFiVx3gtdJ+OFBNITS1KzU1MLUotg skwcnFINTPmCcb2L42xae/jWPFtmeUK74bLT6knaaQFir3TUC3ZoPuqY53mBf09PchmDau6z 7NJtv/w64s/OesG7b0sxi627huG1T5qS3ou4r/4LLRX6O79Ys+qk1ayU47P33pfwjpq5QvvW Ib3Hlyy/TfM9kbFcWKgqke+jbKDc1GSneSxnTBY0xb1X6n05UYHD2t81j9v80++0E0k/zn2L /nghz7r4u9DPBfJOrcuPh2//9YFBWKA0sCdoxfSvuzYtyfFjPbdJw9xie1mvg1X3p/nHVfdF h1ufCVcsesB18Hm3nWBE1dfvHxfXsHClhBZlx95eEm2+evWKr6lv1S1XTQhm+R9YeWz1/jNV Do07KiRYlViKMxINtZiLihMBKOh6SlUDAAA= X-CMS-MailID: 20230411081342epcas5p22a4c587babd6a373cfa709d9609f65f4 X-Msg-Generator: CA X-Sendblock-Type: REQ_APPROVE CMS-TYPE: 105P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20230411081342epcas5p22a4c587babd6a373cfa709d9609f65f4 References: <20230411081041.5328-1-anuj20.g@samsung.com> Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org From: Nitesh Shetty Before enabling copy for dm target, check if underlying devices and dm target support copy. Avoid split happening inside dm target. Fail early if the request needs split, currently splitting copy request is not supported. Signed-off-by: Nitesh Shetty --- drivers/md/dm-table.c | 41 +++++++++++++++++++++++++++++++++++ drivers/md/dm.c | 7 ++++++ include/linux/device-mapper.h | 5 +++++ 3 files changed, 53 insertions(+) diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 1398f1d6e83e..b3269271e761 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -1867,6 +1867,39 @@ static bool dm_table_supports_nowait(struct dm_table *t) return true; } +static int device_not_copy_capable(struct dm_target *ti, struct dm_dev *dev, + sector_t start, sector_t len, void *data) +{ + struct request_queue *q = bdev_get_queue(dev->bdev); + + return !blk_queue_copy(q); +} + +static bool dm_table_supports_copy(struct dm_table *t) +{ + struct dm_target *ti; + unsigned int i; + + for (i = 0; i < t->num_targets; i++) { + ti = dm_table_get_target(t, i); + + if (!ti->copy_offload_supported) + return false; + + /* + * target provides copy support (as implied by setting + * 'copy_offload_supported') + * and it relies on _all_ data devices having copy support. + */ + if (!ti->type->iterate_devices || + ti->type->iterate_devices(ti, + device_not_copy_capable, NULL)) + return false; + } + + return true; +} + static int device_not_discard_capable(struct dm_target *ti, struct dm_dev *dev, sector_t start, sector_t len, void *data) { @@ -1949,6 +1982,14 @@ int dm_table_set_restrictions(struct dm_table *t, struct request_queue *q, q->limits.discard_misaligned = 0; } + if (!dm_table_supports_copy(t)) { + blk_queue_flag_clear(QUEUE_FLAG_COPY, q); + q->limits.max_copy_sectors = 0; + q->limits.max_copy_sectors_hw = 0; + } else { + blk_queue_flag_set(QUEUE_FLAG_COPY, q); + } + if (!dm_table_supports_secure_erase(t)) q->limits.max_secure_erase_sectors = 0; diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 20c6b72a0245..1492bea4d605 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -1709,6 +1709,13 @@ static blk_status_t __split_and_process_bio(struct clone_info *ci) if (unlikely(ci->is_abnormal_io)) return __process_abnormal_io(ci, ti); + if ((unlikely(op_is_copy(ci->bio->bi_opf)) && + max_io_len(ti, ci->sector) < ci->sector_count)) { + DMERR("Error, IO size(%u) > max target size(%llu)\n", + ci->sector_count, max_io_len(ti, ci->sector)); + return BLK_STS_IOERR; + } + /* * Only support bio polling for normal IO, and the target io is * exactly inside the dm_io instance (verified in dm_poll_dm_io) diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h index 8aa6b3ea91fa..70142fff417c 100644 --- a/include/linux/device-mapper.h +++ b/include/linux/device-mapper.h @@ -386,6 +386,11 @@ struct dm_target { * bio_set_dev(). NOTE: ideally a target should _not_ need this. */ bool needs_bio_set_dev:1; + + /* + * copy offload is supported + */ + bool copy_offload_supported:1; }; void *dm_per_bio_data(struct bio *bio, size_t data_size);