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Tue, 29 Oct 2024 16:32:35 +0000 (GMT) Received: from epsmgmcp1.samsung.com (unknown [182.195.42.82]) by epsmtrp2.samsung.com (KnoxPortal) with ESMTP id 20241029163235epsmtrp22684874ace9623df1e50818911f04cd8~C_YTY_V5G1621316213epsmtrp2K; Tue, 29 Oct 2024 16:32:35 +0000 (GMT) X-AuditID: b6c32a4b-4a7fa70000002648-a9-67211a9f88a6 Received: from epsmtip2.samsung.com ( [182.195.34.31]) by epsmgmcp1.samsung.com (Symantec Messaging Gateway) with SMTP id D0.19.18937.32E01276; Wed, 30 Oct 2024 01:32:35 +0900 (KST) Received: from localhost.localdomain (unknown [107.99.41.245]) by epsmtip2.samsung.com (KnoxPortal) with ESMTPA id 20241029163233epsmtip23d279260c8fc2654bbb56d837ab74132~C_YQ_LO9c0998409984epsmtip2d; Tue, 29 Oct 2024 16:32:33 +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 v5 10/10] block: add support to pass user meta buffer Date: Tue, 29 Oct 2024 21:54:02 +0530 Message-Id: <20241029162402.21400-11-anuj20.g@samsung.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20241029162402.21400-1-anuj20.g@samsung.com> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrDJsWRmVeSWpSXmKPExsWy7bCmlu58KcV0g1k/FS0+fv3NYtE04S+z xZxV2xgtVt/tZ7N4ffgTo8XNAzuZLFauPspk8a71HIvF7OnNTBZH/79ls5h06Bqjxd5b2hZ7 9p5ksZi/7Cm7Rff1HWwWy4//Y7I4//c4q8X5WXPYHYQ8ds66y+5x+Wypx6ZVnWwem5fUe+y+ 2cDm8fHpLRaPvi2rGD3OLDjC7vF5k5zHpidvmQK4orJtMlITU1KLFFLzkvNTMvPSbZW8g+Od 403NDAx1DS0tzJUU8hJzU22VXHwCdN0yc4B+UlIoS8wpBQoFJBYXK+nb2RTll5akKmTkF5fY KqUWpOQUmBToFSfmFpfmpevlpZZYGRoYGJkCFSZkZzy918JY0G1esbD5HksDY6tuFyMHh4SA icTSdq4uRi4OIYHdjBLtz+4zQjifGCV+vdzMCuds3feSvYuRE6xjflsfG0RiJ6NEw1sY5zOj xIRjP8Gq2ATUJY48bwWbJSKwh1Gid+FpFhCHWWACk8SC6VuYQaqEBVwlWpobWEBsFgFViRX7 boDZvAJWEtta57FA7JOXmHnpO9hUTqD4saN7mCBqBCVOznwCVsMMVNO8dTYzRP0FDolznWYQ 37lI/PxbBxEWlnh1fAvUC1ISn9/tZYOw0yV+XH7KBGEXSDQf28cIYdtLtJ7qZwYZwyygKbF+ lz5EWFZi6ql1TBBb+SR6fz+BauWV2DEPxlaSaF85B8qWkNh7roEJ4hoPiRnfeCBh1csosfFD E+sERoVZSJ6ZheSZWQibFzAyr2KUTC0ozk1PLTYtMM5LLYdHcnJ+7iZGcDLX8t7B+OjBB71D jEwcjIcYJTiYlUR4V8fKpgvxpiRWVqUW5ccXleakFh9iNAWG9kRmKdHkfGA+ySuJNzSxNDAx MzMzsTQ2M1QS533dOjdFSCA9sSQ1OzW1ILUIpo+Jg1OqgWl+x7w5V2VSPrE80Onwd4z5oNXg XrBu9zmmbYtcJH48sLv6es7jxffDzy7dtaeyIKss3ynm9so29ZM+8lffhm5c+j+KLfLy27vn lSO1fk85lKQ5TeRMbrNaVPhtvr9i9gvE7FedbNFY0svo7svBsFjz69srWd0Cgr3Hj9TN84vu drwp3X+2Obm3LGR1vMHdvH7dh5faJr3qX7fu9Ya6/uX1U+ptXqo/5bj0tjl6+Rw587cz6w7G VPo8u1duEpjzx37t6p5NuwJyOm8vXjc9McboS3Kvnq28UNoRP0bT61zaS77NE75ygPP2Ep3V p5u+sHlFTJNgYkza1Zz66OTGnz8mlIodM3kX4GVd41F5olGJpTgj0VCLuag4EQCq6sFybwQA AA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprAIsWRmVeSWpSXmKPExsWy7bCSvK4yn2K6wbKfOhYfv/5msWia8JfZ Ys6qbYwWq+/2s1m8PvyJ0eLmgZ1MFitXH2WyeNd6jsVi9vRmJouj/9+yWUw6dI3RYu8tbYs9 e0+yWMxf9pTdovv6DjaL5cf/MVmc/3uc1eL8rDnsDkIeO2fdZfe4fLbUY9OqTjaPzUvqPXbf bGDz+Pj0FotH35ZVjB5nFhxh9/i8Sc5j05O3TAFcUVw2Kak5mWWpRfp2CVwZT++1MBZ0m1cs bL7H0sDYqtvFyMkhIWAiMb+tj62LkYtDSGA7o8TqtmeMEAkJiVMvl0HZwhIr/z1nhyj6yChx 9ORBFpAEm4C6xJHnrWBFIgInGCXmT3QDKWIWmMEk8fvPArAiYQFXiZbmBjCbRUBVYsW+G2A2 r4CVxLbWeSwQG+QlZl76zg5icwLFjx3dw9TFyAG0zVLi5CQ3iHJBiZMzn4CVMwOVN2+dzTyB UWAWktQsJKkFjEyrGEVTC4pz03OTCwz1ihNzi0vz0vWS83M3MYIjTStoB+Oy9X/1DjEycTAe YpTgYFYS4V0dK5suxJuSWFmVWpQfX1Sak1p8iFGag0VJnFc5pzNFSCA9sSQ1OzW1ILUIJsvE wSnVwCQ3X7xqsfW5iz2+nH+vTq/v67uyNuNIknqRQl7DEnmLOBanjHMT326a+189bK6fSH1z Yiv37LO3WD/pXpM+mrjE7EPrnelRggv3+Yc6NHg/6VWR2BHCzbFAclVIS5JYUOuX8IordYov fmQdn3fVPmzF2UrFD577ZrCX7cl4ElSkV2v57JHrosc3/e8+eN408+OTTff9+SX3Jb6Zqp92 5MbOuB1e/nEy6wymy4gKV4XubD/sK3bgG1dJ4dPdtWwdXxaorz8tE8ltdW7R3ZzkVbNUJ8Xn a6Xlv8pZe//Yy4zHPfxXGP74ud38bb5dwCiEq0mvwMp8vrztvbMPhDgEL9yf66OZu7hO6M3f 2p28DEosxRmJhlrMRcWJAGAapGAjAwAA X-CMS-MailID: 20241029163235epcas5p340ce6d131cc7bf220db978a2d4dc24c2 X-Msg-Generator: CA X-Sendblock-Type: REQ_APPROVE CMS-TYPE: 105P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20241029163235epcas5p340ce6d131cc7bf220db978a2d4dc24c2 References: <20241029162402.21400-1-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 | 42 ++++++++++++++++++++++------- include/linux/bio-integrity.h | 7 +++++ 3 files changed, 90 insertions(+), 9 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..3cf7e15eabbc 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 { @@ -128,6 +129,9 @@ static void blkdev_bio_end_io(struct bio *bio) if (bio->bi_status && !dio->bio.bi_status) dio->bio.bi_status = bio->bi_status; + if (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)) { struct kiocb *iocb = dio->iocb; @@ -221,14 +225,16 @@ 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 +275,12 @@ 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 +298,9 @@ 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 +345,8 @@ 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 +359,13 @@ 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 +380,10 @@ 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 fe2bfe122db2..96ec559c24ef 100644 --- a/include/linux/bio-integrity.h +++ b/include/linux/bio-integrity.h @@ -24,6 +24,7 @@ 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 */ @@ -80,6 +81,7 @@ 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); @@ -110,6 +112,11 @@ 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) { }