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Wed, 6 Nov 2024 12:27:21 +0000 (GMT) Received: from epsmgms1p1new.samsung.com (unknown [182.195.42.41]) by epsmtrp1.samsung.com (KnoxPortal) with ESMTP id 20241106122721epsmtrp1bdd1f5a15dcf3734ec183b4cc1275f08~FYMdnuyhZ2054020540epsmtrp1T; Wed, 6 Nov 2024 12:27:21 +0000 (GMT) X-AuditID: b6c32a4b-4a7fa70000002648-7e-672b7d58f2f4 Received: from epsmtip1.samsung.com ( [182.195.34.30]) by epsmgms1p1new.samsung.com (Symantec Messaging Gateway) with SMTP id CA.01.35203.9A06B276; Wed, 6 Nov 2024 21:27:21 +0900 (KST) Received: from localhost.localdomain (unknown [107.99.41.245]) by epsmtip1.samsung.com (KnoxPortal) with ESMTPA id 20241106122718epsmtip1f4f0cccb196ed013747170516d7b45df~FYMbJ800Q0829608296epsmtip1F; Wed, 6 Nov 2024 12:27:18 +0000 (GMT) From: Anuj Gupta To: axboe@kernel.dk, hch@lst.de, kbusch@kernel.org, martin.petersen@oracle.com, asml.silence@gmail.com, anuj1072538@gmail.com, brauner@kernel.org, jack@suse.cz, viro@zeniv.linux.org.uk Cc: io-uring@vger.kernel.org, linux-nvme@lists.infradead.org, linux-block@vger.kernel.org, gost.dev@samsung.com, linux-scsi@vger.kernel.org, vishak.g@samsung.com, linux-fsdevel@vger.kernel.org, Kanchan Joshi , Anuj Gupta Subject: [PATCH v8 10/10] block: add support to pass user meta buffer Date: Wed, 6 Nov 2024 17:48:42 +0530 Message-Id: <20241106121842.5004-11-anuj20.g@samsung.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20241106121842.5004-1-anuj20.g@samsung.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA01Ta0xTZxj2O+fQ62oORbdvDczuZLoAgbbQ1lPHbRsuJ8FEkv1RtgQLPSmM 0na9zEE0a0TQ4SoMQbQi1MkUqs7Bym1Q4xBoQC4bbEi97CbIxKEiY+qaylpaNv897/s+z/Pm +S4slP8zQ8DK15pog1apIRgcrP1KdHTcjr2xavGls2vJhSUvRu6r9KFknaMdkOduVTDIe1ce AdJzuQshm8/1I+T90lGMPFFbgpD9y/MMsqp3EpCu67Fkj2sQIxvOzDDJQ9c6GeRZ9zOEHPO5 w8gxWx0zjU912W4xqYkRM9Xq+JRBfdP4CdXtsTCohZnrGHXY6QDUsL2PSS22vkK1Ts8jmZys gqQ8WqmiDUJam6tT5WvVyUTGu9lvZ8vkYkmcREFuJoRaZSGdTKRvy4x7J1/jz0QIP1JqzP5W ptJoJEQpSQad2UQL83RGUzJB61UavVQfb1QWGs1adbyWNm2RiMUJMj9xV0HeQNsvQH9I8fG1 iWZgAd/HlwM2C+JSeH5wjFkOOCw+3g2gfXYpLFg8AnDCdzE0+RvAG47LyKrEu9+LBAcuACc7 /gwViwBedU6tsBj467BvthQEBuvwHgCtp65igQLFKxFor3WiAVYEvhVOWuuxAMbwjbDl/rRf wWLxcAV8UMIMrtsAj48/XsFsf3tksR0EMA8Ph4PHp1ekqJ9T0nYCDfhD/CYLjtvtKz4QT4dH uzODPhFwzu0MeQrg3YqyEFbDJxMzoWh6WDJwCQRxKiwdqkADNigeDS9+Kwq2o2DN0FdIcO1a aPVOh6Q82Fm/igl4oLkuhCF0jVpCmIItz6qx4GF9BqDLOoVUAqHtuTi25+LY/l9tB6gDvEzr jYVq2ijTJ2rp3f9dc66usBWsPPSYjE7w+68P43sBwgK9ALJQYh1ve1asms9TKYuKaYMu22DW 0MZeIPMf9+eoYH2uzv9TtKZsiVQhlsrlcqkiUS4hXuLdKz2p4uNqpYkuoGk9bVjVISy2wIK4 jwi2nvRxl5e3DMjWi7kJOZFzPyCGXJugxdOwOWXhdocNd4saI97fkWtOS22rjEkZlj4pmTdV l+0UCedaNsx1NaQn981bR+Tb+qeLtbtq65cuyM6/Ov6dew3bEj5k6XC8UJTYy1aNJvy4pqw6 h3eq4CHoThXd4C6hvtNRjPf2v9E9eLAtv2g2z/MbV9QklKWmvWmpOPh13Z3wxeap8tP7nOV1 j61ZNTc3fVBpq/miqW03J4M7jIXtKf7y2B9H0eq7rx3AZ6oEnEhFXIHbt/dFh7yxZ6GJeWfP TvbTM3/dbt7kiUro+Ccn3hXpcyZ1XjicVPWgjCv3lvYfeTry01v9sg8JzJinlMSgBqPyX8jA fZRxBAAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprMIsWRmVeSWpSXmKPExsWy7bCSnO7KBO10g40H+Sw+fv3NYtE04S+z xZxV2xgtVt/tZ7N4ffgTo8XNAzuZLFauPspk8a71HIvF7OnNTBZH/79ls5h06Bqjxd5b2hZ7 9p5ksZi/7Cm7Rff1HWwWy4//Y7I4//c4q8X5WXPYHYQ8ds66y+5x+Wypx6ZVnWwem5fUe+y+ 2cDm8fHpLRaPvi2rGD3OLDjC7vF5k5zHpidvmQK4orhsUlJzMstSi/TtErgyjm29z1jQbVlx /fJKxgbGC3pdjJwcEgImEr9bfjN1MXJxCAnsZpR43HeaGSIhIXHq5TJGCFtYYuW/5+wgtpDA R0aJhwfDQWw2AXWJI89bwWpEBE4wSsyf6AYyiFlgBpPE7z8LWEASwgKuEtd654HZLAKqEhvf PQFq4ODgFbCUeN/MDjFfXmLmpe9gNidQ+OznbYwQuywk/izoA7uHV0BQ4uTMJ2BjmIHqm7fO Zp7AKDALSWoWktQCRqZVjJKpBcW56bnFhgWGeanlesWJucWleel6yfm5mxjB8aaluYNx+6oP eocYmTgYDzFKcDArifD6R2mnC/GmJFZWpRblxxeV5qQWH2KU5mBREucVf9GbIiSQnliSmp2a WpBaBJNl4uCUamDKuPD/xKHcKp9tF/xzJjmfbKxJinljlVP7m/1vWeW/CJeHkcXbs+4+fW+4 4vbtpXsKlk96pBdX8bvE/q2WjrzqwwnVtvujFPvLUnhX/FvW6qQW2PDqE+vNzufvXqRmZe8P 27U/tz39/nSHL0JMb1/WNss+msr88emTmS3yGlO+rzw4gc/x0KytDAuPrFx25O73aRGT3Dv0 P52Kdtn0oF/ATaqX5VXHubX/WB+Xc3tGM2rnrDpn+nj+zaoCwayH23hckuc1O6f8ad3r6533 Mrr5ieL7dX8471sl1LW3T+b3zDmzQluCoecv80HO22tPFspESBsEMEi1uZUuP8L+49Us3X12 4m2sm39y3wnV3/tDiaU4I9FQi7moOBEAz/uG0iYDAAA= X-CMS-MailID: 20241106122721epcas5p3849e3582fcb6547be2b1b10b031138d4 X-Msg-Generator: CA X-Sendblock-Type: REQ_APPROVE CMS-TYPE: 105P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20241106122721epcas5p3849e3582fcb6547be2b1b10b031138d4 References: <20241106121842.5004-1-anuj20.g@samsung.com> From: Kanchan Joshi If an iocb contains metadata, extract that and prepare the bip. Based on flags specified by the user, set corresponding guard/app/ref tags to be checked in bip. Reviewed-by: Christoph Hellwig Signed-off-by: Anuj Gupta Signed-off-by: Kanchan Joshi Reviewed-by: Keith Busch --- block/bio-integrity.c | 50 +++++++++++++++++++++++++++++++++++ block/fops.c | 45 ++++++++++++++++++++++++------- include/linux/bio-integrity.h | 7 +++++ 3 files changed, 92 insertions(+), 10 deletions(-) diff --git a/block/bio-integrity.c b/block/bio-integrity.c index 3bee43b87001..5d81ad9a3d20 100644 --- a/block/bio-integrity.c +++ b/block/bio-integrity.c @@ -364,6 +364,55 @@ int bio_integrity_map_user(struct bio *bio, struct iov_iter *iter) return ret; } +static void bio_uio_meta_to_bip(struct bio *bio, struct uio_meta *meta) +{ + struct bio_integrity_payload *bip = bio_integrity(bio); + + if (meta->flags & IO_INTEGRITY_CHK_GUARD) + bip->bip_flags |= BIP_CHECK_GUARD; + if (meta->flags & IO_INTEGRITY_CHK_APPTAG) + bip->bip_flags |= BIP_CHECK_APPTAG; + if (meta->flags & IO_INTEGRITY_CHK_REFTAG) + bip->bip_flags |= BIP_CHECK_REFTAG; + + bip->app_tag = meta->app_tag; +} + +int bio_integrity_map_iter(struct bio *bio, struct uio_meta *meta) +{ + struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk); + unsigned int integrity_bytes; + int ret; + struct iov_iter it; + + if (!bi) + return -EINVAL; + /* + * original meta iterator can be bigger. + * process integrity info corresponding to current data buffer only. + */ + it = meta->iter; + integrity_bytes = bio_integrity_bytes(bi, bio_sectors(bio)); + if (it.count < integrity_bytes) + return -EINVAL; + + /* should fit into two bytes */ + BUILD_BUG_ON(IO_INTEGRITY_VALID_FLAGS >= (1 << 16)); + + if (meta->flags && (meta->flags & ~IO_INTEGRITY_VALID_FLAGS)) + return -EINVAL; + + it.count = integrity_bytes; + ret = bio_integrity_map_user(bio, &it); + if (!ret) { + bio_uio_meta_to_bip(bio, meta); + bip_set_seed(bio_integrity(bio), meta->seed); + iov_iter_advance(&meta->iter, integrity_bytes); + meta->seed += bio_integrity_intervals(bi, bio_sectors(bio)); + } + return ret; +} + /** * bio_integrity_prep - Prepare bio for integrity I/O * @bio: bio to prepare @@ -564,6 +613,7 @@ int bio_integrity_clone(struct bio *bio, struct bio *bio_src, bip->bip_vec = bip_src->bip_vec; bip->bip_iter = bip_src->bip_iter; bip->bip_flags = bip_src->bip_flags & BIP_CLONE_FLAGS; + bip->app_tag = bip_src->app_tag; return 0; } diff --git a/block/fops.c b/block/fops.c index 2d01c9007681..412ae74032ad 100644 --- a/block/fops.c +++ b/block/fops.c @@ -54,6 +54,7 @@ static ssize_t __blkdev_direct_IO_simple(struct kiocb *iocb, struct bio bio; ssize_t ret; + WARN_ON_ONCE(iocb->ki_flags & IOCB_HAS_METADATA); if (nr_pages <= DIO_INLINE_BIO_VECS) vecs = inline_vecs; else { @@ -124,12 +125,16 @@ static void blkdev_bio_end_io(struct bio *bio) { struct blkdev_dio *dio = bio->bi_private; bool should_dirty = dio->flags & DIO_SHOULD_DIRTY; + bool is_sync = dio->flags & DIO_IS_SYNC; if (bio->bi_status && !dio->bio.bi_status) dio->bio.bi_status = bio->bi_status; + if (!is_sync && (dio->iocb->ki_flags & IOCB_HAS_METADATA)) + bio_integrity_unmap_user(bio); + if (atomic_dec_and_test(&dio->ref)) { - if (!(dio->flags & DIO_IS_SYNC)) { + if (!is_sync) { struct kiocb *iocb = dio->iocb; ssize_t ret; @@ -221,14 +226,16 @@ static ssize_t __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter, * a retry of this from blocking context. */ if (unlikely(iov_iter_count(iter))) { - bio_release_pages(bio, false); - bio_clear_flag(bio, BIO_REFFED); - bio_put(bio); - blk_finish_plug(&plug); - return -EAGAIN; + ret = -EAGAIN; + goto fail; } bio->bi_opf |= REQ_NOWAIT; } + if (!is_sync && (iocb->ki_flags & IOCB_HAS_METADATA)) { + ret = bio_integrity_map_iter(bio, iocb->private); + if (unlikely(ret)) + goto fail; + } if (is_read) { if (dio->flags & DIO_SHOULD_DIRTY) @@ -269,6 +276,12 @@ static ssize_t __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter, bio_put(&dio->bio); return ret; +fail: + bio_release_pages(bio, false); + bio_clear_flag(bio, BIO_REFFED); + bio_put(bio); + blk_finish_plug(&plug); + return ret; } static void blkdev_bio_end_io_async(struct bio *bio) @@ -286,6 +299,9 @@ static void blkdev_bio_end_io_async(struct bio *bio) ret = blk_status_to_errno(bio->bi_status); } + if (iocb->ki_flags & IOCB_HAS_METADATA) + bio_integrity_unmap_user(bio); + iocb->ki_complete(iocb, ret); if (dio->flags & DIO_SHOULD_DIRTY) { @@ -330,10 +346,8 @@ static ssize_t __blkdev_direct_IO_async(struct kiocb *iocb, bio_iov_bvec_set(bio, iter); } else { ret = bio_iov_iter_get_pages(bio, iter); - if (unlikely(ret)) { - bio_put(bio); - return ret; - } + if (unlikely(ret)) + goto out_bio_put; } dio->size = bio->bi_iter.bi_size; @@ -346,6 +360,13 @@ static ssize_t __blkdev_direct_IO_async(struct kiocb *iocb, task_io_account_write(bio->bi_iter.bi_size); } + if (iocb->ki_flags & IOCB_HAS_METADATA) { + ret = bio_integrity_map_iter(bio, iocb->private); + WRITE_ONCE(iocb->private, NULL); + if (unlikely(ret)) + goto out_bio_put; + } + if (iocb->ki_flags & IOCB_ATOMIC) bio->bi_opf |= REQ_ATOMIC; @@ -360,6 +381,10 @@ static ssize_t __blkdev_direct_IO_async(struct kiocb *iocb, submit_bio(bio); } return -EIOCBQUEUED; + +out_bio_put: + bio_put(bio); + return ret; } static ssize_t blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter) diff --git a/include/linux/bio-integrity.h b/include/linux/bio-integrity.h index 2195bc06dcde..de0a6c9de4d1 100644 --- a/include/linux/bio-integrity.h +++ b/include/linux/bio-integrity.h @@ -23,6 +23,7 @@ struct bio_integrity_payload { unsigned short bip_vcnt; /* # of integrity bio_vecs */ unsigned short bip_max_vcnt; /* integrity bio_vec slots */ unsigned short bip_flags; /* control flags */ + u16 app_tag; /* application tag value */ struct bvec_iter bio_iter; /* for rewinding parent bio */ @@ -78,6 +79,7 @@ struct bio_integrity_payload *bio_integrity_alloc(struct bio *bio, gfp_t gfp, int bio_integrity_add_page(struct bio *bio, struct page *page, unsigned int len, unsigned int offset); int bio_integrity_map_user(struct bio *bio, struct iov_iter *iter); +int bio_integrity_map_iter(struct bio *bio, struct uio_meta *meta); void bio_integrity_unmap_user(struct bio *bio); bool bio_integrity_prep(struct bio *bio); void bio_integrity_advance(struct bio *bio, unsigned int bytes_done); @@ -108,6 +110,11 @@ static int bio_integrity_map_user(struct bio *bio, struct iov_iter *iter) return -EINVAL; } +static inline int bio_integrity_map_iter(struct bio *bio, struct uio_meta *meta) +{ + return -EINVAL; +} + static inline void bio_integrity_unmap_user(struct bio *bio) { }