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Mon, 4 Nov 2024 14:14:27 +0000 (GMT) Received: from epsmgms1p1new.samsung.com (unknown [182.195.42.41]) by epsmtrp1.samsung.com (KnoxPortal) with ESMTP id 20241104141427epsmtrp1951680db65d85ed654f857efd67449e3~EyXaAWEzH1329813298epsmtrp1P; Mon, 4 Nov 2024 14:14:27 +0000 (GMT) X-AuditID: b6c32a4b-23fff70000002648-1e-6728ee852624 Received: from epsmtip2.samsung.com ( [182.195.34.31]) by epsmgms1p1new.samsung.com (Symantec Messaging Gateway) with SMTP id B5.68.35203.3C6D8276; Mon, 4 Nov 2024 23:14:27 +0900 (KST) Received: from localhost.localdomain (unknown [107.99.41.245]) by epsmtip2.samsung.com (KnoxPortal) with ESMTPA id 20241104141425epsmtip2d47aa99a68a1870ba126da63ba39a31e~EyXXk6KtK3097330973epsmtip2V; Mon, 4 Nov 2024 14:14:24 +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, Anuj Gupta Subject: [PATCH v7 00/10] Read/Write with meta/integrity Date: Mon, 4 Nov 2024 19:35:51 +0530 Message-Id: <20241104140601.12239-1-anuj20.g@samsung.com> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrNJsWRmVeSWpSXmKPExsWy7bCmum7rO410g2dv2S0+fv3NYtE04S+z xZxV2xgtVt/tZ7N4ffgTo8XNAzuZLFauPspk8a71HIvF7OnNTBaTDl1jtNh7S9tiz96TLBbz lz1lt+i+voPNYvnxf0wW5/8eZ7U4P2sOu4Ogx85Zd9k9Lp8t9di0qpPNY/OSeo/dNxvYPD4+ vcXi0bdlFaPHmQVH2D0+b5Lz2PTkLVMAV1S2TUZqYkpqkUJqXnJ+SmZeuq2Sd3C8c7ypmYGh rqGlhbmSQl5ibqqtkotPgK5bZg7QO0oKZYk5pUChgMTiYiV9O5ui/NKSVIWM/OISW6XUgpSc ApMCveLE3OLSvHS9vNQSK0MDAyNToMKE7IzZP2+xFvyOrHjzNriBcbpjFyMHh4SAicSm5Uld jFwcQgK7GSVmb7nICuF8YpT40/yYGcL5xijxa+t29i5GTrCO22d62CESexkltk/6BVX1mVGi Ye8UJpAqNgF1iSPPWxlBEiICexgleheeZgFxmAVeMkosXbWIBaRKWMBC4tSNFcwgNouAqsT2 U4vBunkFLCUu3z3KCrFPXmLmpe/sEHFBiZMzn4D1MgPFm7fOBlstIbCFQ6LtwB02iAYXidPH 10IdKyzx6vgWKFtK4mV/G5SdLvHj8lMmCLtAovnYPkYI216i9VQ/MyhomAU0Jdbv0ocIy0pM PbWOCWIvn0Tv7ydQrbwSO+bB2EoS7SvnQNkSEnvPNUDZHhJvus8wgYwUEoiVWNCvMYFRfhaS b2Yh+WYWwuIFjMyrGCVTC4pz01OLTQuM81LL4RGbnJ+7iRGcqrW8dzA+evBB7xAjEwfjIUYJ DmYlEd55qerpQrwpiZVVqUX58UWlOanFhxhNgUE8kVlKNDkfmC3ySuINTSwNTMzMzEwsjc0M lcR5X7fOTRESSE8sSc1OTS1ILYLpY+LglAJ6Je+G6KsvlooyLmY7Py/6rxKdZ3v+7433dzi5 0+UeNnttV1Q+YfJe8csaDtaSpfO0nbVn1609s2L/XfWFb3bd37d2xZPFfrM6iupUZR4+/VFY n2N0Pe8t66lVE6pO/46JPLEt37yoM5CteBdT+TfTmxM4t0Ru5ro2P2GN5YzLpby7NxjWtjNU +3i0JnnpbDt7aIc705GYxLZPbHv/bpyyu/dAgmOWQK4S1/JtQUd+zRBkXjH7wQytSxv9Zh2/ PLM0eld07e1IDcmlDQKPBH5oO744YHf8C+O7Tcr8stGcW/+X3wiU3P1aomLG5z6htGkCzy8s UTzj8TU2dXdE9doba28fMQhMmSoaFpZ0iOeuoRJLcUaioRZzUXEiAMb3InheBAAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrOLMWRmVeSWpSXmKPExsWy7bCSvO7haxrpBne/Sll8/PqbxaJpwl9m izmrtjFarL7bz2bx+vAnRoubB3YyWaxcfZTJ4l3rORaL2dObmSwmHbrGaLH3lrbFnr0nWSzm L3vKbtF9fQebxfLj/5gszv89zmpxftYcdgdBj52z7rJ7XD5b6rFpVSebx+Yl9R67bzaweXx8 eovFo2/LKkaPMwuOsHt83iTnsenJW6YArigum5TUnMyy1CJ9uwSujNk/b7EW/I6sePM2uIFx umMXIyeHhICJxO0zPexdjFwcQgK7GSXav71ihUhISJx6uYwRwhaWWPnvOVTRR0aJvw8WM4Ek 2ATUJY48bwUrEhE4wSgxf6IbSBEzSNGEL7NZQBLCAhYSp26sYAaxWQRUJbafgmjmFbCUuHz3 KNQ2eYmZl76zQ8QFJU7OfALWywwUb946m3kCI98sJKlZSFILGJlWMUqmFhTnpucWGxYY5qWW 6xUn5haX5qXrJefnbmIEx42W5g7G7as+6B1iZOJgPMQowcGsJMI7L1U9XYg3JbGyKrUoP76o NCe1+BCjNAeLkjiv+IveFCGB9MSS1OzU1ILUIpgsEwenVANTRvQiQ8/5lzTqFr02XH3AjeuN 1sbJFt2bO6Ypn/Kd9jV2oWyI4a2lKu57Vbduibj+3pA16HGV4x6Ge3PTq/X1nRQWrb3VFsfN qnY1L9RxMnt4REpHWN2RC/+vM3K9/ZUvPOmLvWqEvHPzTTaJhsPPa5479KTtNnzGWpp472dC XuAJzT3XVLsNJya9ydle5vbTJGzRjryOaVpJrYXb/G6ZrPvGqHb9jfDBH3Ev2Z+H9d7trX2S dky0TDakx/S77po0Ld+deQLrViimGlnmuTiK8D//fca62uLgnGXmhTkRzftuPNj52+j8t80b zXd3r//yW9f8/vX5vw9Xz2a3it74YevUVwVvrli4K+4+OMFKiaU4I9FQi7moOBEAXt8liQoD AAA= X-CMS-MailID: 20241104141427epcas5p2174ded627e2d785294ac4977b011a75b X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-Sendblock-Type: REQ_APPROVE CMS-TYPE: 105P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20241104141427epcas5p2174ded627e2d785294ac4977b011a75b References: This adds a new io_uring interface to exchange additional integrity/pi metadata with read/write. The patchset is on top of block/for-next. Interface: A new meta_type field is introduced in SQE, which describes the type of metadata. Currently one type "META_TYPE_PI" is supported. This meta type requires application to setup a SQE128 ring. Application can use the second SQE to pass following PI informaion: * pi_flags: Three flags are exposed for integrity checks, namely IO_INTEGRITY_CHK_GUARD/APPTAG/REFTAG. * len: length of the meta buffer * addr: address of the meta buffer * seed: seed value for reftag remapping * app_tag: application-specific 16b value Block path (direct IO) , NVMe and SCSI driver are modified to support this. Patch 1 is an enhancement patch. Patch 2 is required to make the bounce buffer copy back work correctly. Patch 3 to 5 are prep patches. Patch 6 adds the io_uring support. Patch 7 gives us unified interface for user and kernel generated integrity. Patch 8 adds support in SCSI and patch 9 in NVMe. Patch 10 adds the support for block direct IO. Testing has been done by modifying fio to use this interface. Example program for the interface is appended below [1]. Changes since v6: https://lore.kernel.org/linux-block/20241030180112.4635-1-joshi.k@samsung.com/ - io_uring changes (bring back meta_type, move PI to the end of SQE128) - Fix robot warnings Changes since v5: https://lore.kernel.org/linux-block/20241029162402.21400-1-anuj20.g@samsung.com/ - remove meta_type field from SQE (hch, keith) - remove __bitwise annotation (hch) - remove BIP_CTRL_NOCHECK from scsi (hch) Changes since v4: https://lore.kernel.org/linux-block/20241016112912.63542-1-anuj20.g@samsung.com/ - better variable names to describe bounce buffer copy back (hch) - move defintion of flags in the same patch introducing uio_meta (hch) - move uio_meta definition to include/linux/uio.h (hch) - bump seed size in uio_meta to 8 bytes (martin) - move flags definition to include/uapi/linux/fs.h (hch) - s/meta/metadata in commit description of io-uring (hch) - rearrange the meta fields in sqe for cleaner layout - partial submission case is not applicable as, we are only plumbing for async case - s/META_TYPE_INTEGRITY/META_TYPE_PI (hch, martin) - remove unlikely branching (hch) - Better formatting, misc cleanups, better commit descriptions, reordering commits(hch) Changes since v3: https://lore.kernel.org/linux-block/20240823103811.2421-1-anuj20.g@samsung.com/ - add reftag seed support (Martin) - fix incorrect formatting in uio_meta (hch) - s/IOCB_HAS_META/IOCB_HAS_METADATA (hch) - move integrity check flags to block layer header (hch) - add comments for BIP_CHECK_GUARD/REFTAG/APPTAG flags (hch) - remove bio_integrity check during completion if IOCB_HAS_METADATA is set (hch) - use goto label to get rid of duplicate error handling (hch) - add warn_on if trying to do sync io with iocb_has_metadata flag (hch) - remove check for disabling reftag remapping (hch) - remove BIP_INTEGRITY_USER flag (hch) - add comment for app_tag field introduced in bio_integrity_payload (hch) - pass request to nvme_set_app_tag function (hch) - right indentation at a place in scsi patch (hch) - move IOCB_HAS_METADATA to a separate fs patch (hch) Changes since v2: https://lore.kernel.org/linux-block/20240626100700.3629-1-anuj20.g@samsung.com/ - io_uring error handling styling (Gabriel) - add documented helper to get metadata bytes from data iter (hch) - during clone specify "what flags to clone" rather than "what not to clone" (hch) - Move uio_meta defination to bio-integrity.h (hch) - Rename apptag field to app_tag (hch) - Change datatype of flags field in uio_meta to bitwise (hch) - Don't introduce BIP_USER_CHK_FOO flags (hch, martin) - Driver should rely on block layer flags instead of seeing if it is user-passthrough (hch) - update the scsi code for handling user-meta (hch, martin) Changes since v1: https://lore.kernel.org/linux-block/20240425183943.6319-1-joshi.k@samsung.com/ - Do not use new opcode for meta, and also add the provision to introduce new meta types beyond integrity (Pavel) - Stuff IOCB_HAS_META check in need_complete_io (Jens) - Split meta handling in NVMe into a separate handler (Keith) - Add meta handling for __blkdev_direct_IO too (Keith) - Don't inherit BIP_COPY_USER flag for cloned bio's (Christoph) - Better commit descriptions (Christoph) Changes since RFC: - modify io_uring plumbing based on recent async handling state changes - fixes/enhancements to correctly handle the split for meta buffer - add flags to specify guard/reftag/apptag checks - add support to send apptag [1] #define _GNU_SOURCE #include #include #include #include #include #include #include "liburing.h" /* * write data/meta. read both. compare. send apptag too. * prerequisite: * protected xfer: format namespace with 4KB + 8b, pi_type = 1 * For testing reftag remapping on device-mapper, create a * device-mapper and run this program. Device mapper creation: * # echo 0 80 linear /dev/nvme0n1 0 > /tmp/table * # echo 80 160 linear /dev/nvme0n1 200 >> /tmp/table * # dmsetup create two /tmp/table * # ./a.out /dev/dm-0 */ #define DATA_LEN 4096 #define META_LEN 8 struct t10_pi_tuple { __be16 guard; __be16 apptag; __be32 reftag; }; int main(int argc, char *argv[]) { struct io_uring ring; struct io_uring_sqe *sqe = NULL; struct io_uring_cqe *cqe = NULL; void *wdb,*rdb; char wmb[META_LEN], rmb[META_LEN]; char *data_str = "data buffer"; int fd, ret, blksize; struct stat fstat; unsigned long long offset = DATA_LEN * 10; struct t10_pi_tuple *pi; struct io_uring_sqe_ext *sqe_ext; if (argc != 2) { fprintf(stderr, "Usage: %s ", argv[0]); return 1; }; if (stat(argv[1], &fstat) == 0) { blksize = (int)fstat.st_blksize; } else { perror("stat"); return 1; } if (posix_memalign(&wdb, blksize, DATA_LEN)) { perror("posix_memalign failed"); return 1; } if (posix_memalign(&rdb, blksize, DATA_LEN)) { perror("posix_memalign failed"); return 1; } memset(wdb, 0, DATA_LEN); fd = open(argv[1], O_RDWR | O_DIRECT); if (fd < 0) { printf("Error in opening device\n"); return 0; } ret = io_uring_queue_init(8, &ring, IORING_SETUP_SQE128); if (ret) { fprintf(stderr, "ring setup failed: %d\n", ret); return 1; } /* write data + meta-buffer to device */ sqe = io_uring_get_sqe(&ring); if (!sqe) { fprintf(stderr, "get sqe failed\n"); return 1; } io_uring_prep_write(sqe, fd, wdb, DATA_LEN, offset); sqe->meta_type = META_TYPE_PI; sqe_ext= (struct io_uring_sqe_ext *) (sqe + 1); sqe_ext->rw_pi.addr = (__u64)wmb; sqe_ext->rw_pi.len = META_LEN; /* flags to ask for guard/reftag/apptag*/ sqe_ext->rw_pi.flags = IO_INTEGRITY_CHK_GUARD | IO_INTEGRITY_CHK_REFTAG | IO_INTEGRITY_CHK_APPTAG; sqe_ext->rw_pi.app_tag = 0x1234; sqe_ext->rw_pi.seed = 10; pi = (struct t10_pi_tuple *)wmb; pi->guard = 0; pi->reftag = 0x0A000000; pi->apptag = 0x3412; ret = io_uring_submit(&ring); if (ret <= 0) { fprintf(stderr, "sqe submit failed: %d\n", ret); return 1; } ret = io_uring_wait_cqe(&ring, &cqe); if (!cqe) { fprintf(stderr, "cqe is NULL :%d\n", ret); return 1; } if (cqe->res < 0) { fprintf(stderr, "write cqe failure: %d", cqe->res); return 1; } io_uring_cqe_seen(&ring, cqe); /* read data + meta-buffer back from device */ sqe = io_uring_get_sqe(&ring); if (!sqe) { fprintf(stderr, "get sqe failed\n"); return 1; } io_uring_prep_read(sqe, fd, rdb, DATA_LEN, offset); sqe->meta_type = META_TYPE_PI; sqe_ext= (struct io_uring_sqe_ext *) (sqe + 1); sqe_ext->rw_pi.addr = (__u64)rmb; sqe_ext->rw_pi.len = META_LEN; sqe_ext->rw_pi.flags = IO_INTEGRITY_CHK_GUARD | IO_INTEGRITY_CHK_REFTAG | IO_INTEGRITY_CHK_APPTAG; sqe_ext->rw_pi.app_tag = 0x1234; sqe_ext->rw_pi.seed = 10; ret = io_uring_submit(&ring); if (ret <= 0) { fprintf(stderr, "sqe submit failed: %d\n", ret); return 1; } ret = io_uring_wait_cqe(&ring, &cqe); if (!cqe) { fprintf(stderr, "cqe is NULL :%d\n", ret); return 1; } if (cqe->res < 0) { fprintf(stderr, "read cqe failure: %d", cqe->res); return 1; } pi = (struct t10_pi_tuple *)rmb; if (pi->apptag != 0x3412) printf("Failure: apptag mismatch!\n"); if (pi->reftag != 0x0A000000) printf("Failure: reftag mismatch!\n"); io_uring_cqe_seen(&ring, cqe); pi = (struct t10_pi_tuple *)rmb; if (strncmp(wmb, rmb, META_LEN)) printf("Failure: meta mismatch!, wmb=%s, rmb=%s\n", wmb, rmb); if (strncmp(wdb, rdb, DATA_LEN)) printf("Failure: data mismatch!\n"); io_uring_queue_exit(&ring); free(rdb); free(wdb); return 0; } Anuj Gupta (7): block: define set of integrity flags to be inherited by cloned bip block: modify bio_integrity_map_user to accept iov_iter as argument fs, iov_iter: define meta io descriptor fs: introduce IOCB_HAS_METADATA for metadata io_uring/rw: add support to send metadata along with read/write block: introduce BIP_CHECK_GUARD/REFTAG/APPTAG bip_flags scsi: add support for user-meta interface Christoph Hellwig (1): block: copy back bounce buffer to user-space correctly in case of split Kanchan Joshi (2): nvme: add support for passing on the application tag block: add support to pass user meta buffer block/bio-integrity.c | 84 +++++++++++++++++++++++++++------ block/blk-integrity.c | 10 +++- block/fops.c | 42 +++++++++++++---- drivers/nvme/host/core.c | 21 +++++---- drivers/scsi/sd.c | 4 +- include/linux/bio-integrity.h | 25 +++++++--- include/linux/fs.h | 1 + include/linux/uio.h | 9 ++++ include/uapi/linux/fs.h | 9 ++++ include/uapi/linux/io_uring.h | 30 ++++++++++++ io_uring/io_uring.c | 8 ++++ io_uring/rw.c | 88 ++++++++++++++++++++++++++++++++++- io_uring/rw.h | 14 +++++- 13 files changed, 300 insertions(+), 45 deletions(-) -- 2.25.1