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bce159d734
-----BEGIN PGP SIGNATURE----- iQJEBAABCAAuFiEEwPw5LcreJtl1+l5K99NY+ylx4KYFAl7VPc4QHGF4Ym9lQGtl cm5lbC5kawAKCRD301j7KXHgpgQkEACnQlzWOfNQMz1AzgUAv/S8IYDJCLrkbjLZ JK4pJv8Hjhss/7sS+fd8kyKe9VtaZz2IjmrXcC66RMMwtpx4iHnkRffoNAgEdGOl /M5TCZGhs+F/mp3Lc0WdR5DFHkM6yy2Tkk9wCFLreB4bW67janAWnd7nbU4INqJj +WqIgpzNMc/kfUhpBYTeQLORhL4e2TG9ADTi/zeUITlpnEsA65LOgXKEpeIFYnSX KTl4GIZ9tjazG3Y1Eva7DYHDIErNNAtX67KBqf+WBgMV98eB0O6xIPN1WlmhDTqj FGMLkb8msH1HHntvxDAuc4/ortnUy8vPI4o6zKP89HJJNjIM5p5eHEuVF5JnBw42 Rtu9Om6JqWx51nhAhJNBj9bUStYbhEl0vVQCwbkfPbDJhzTy3RR8z709q9+ZwOrL xbp4aJBzqrzscjBEiSQbNCf2PyuOAdU0r1x81UN81ZN41d5qUcumcinjw4Y7vru8 z5zMlo1Iy/AWQYyu7jgHmnpI7ZyA/1Qclo5dV7aa72bLFaJa35e7QxgfQOFBA5dY UZl6QPJRlnB80uGRzD5jCh2O2sQ3XZqYnpaKsUAka1GgbceCp9IC4A5mfZvpACsh Xk8VXjlhvY/iPJsKLqrh4Oedg4Dj5M3PLL9C3MDfYeIP2qgXpbnk87UV1TPNSpY0 QcTxsXXXIw== =H+/Z -----END PGP SIGNATURE----- Merge tag 'for-5.8/drivers-2020-06-01' of git://git.kernel.dk/linux-block Pull block driver updates from Jens Axboe: "On top of the core changes, here are the block driver changes for this merge window: - NVMe changes: - NVMe over Fibre Channel protocol updates, which also reach over to drivers/scsi/lpfc (James Smart) - namespace revalidation support on the target (Anthony Iliopoulos) - gcc zero length array fix (Arnd Bergmann) - nvmet cleanups (Chaitanya Kulkarni) - misc cleanups and fixes (me, Keith Busch, Sagi Grimberg) - use a SRQ per completion vector (Max Gurtovoy) - fix handling of runtime changes to the queue count (Weiping Zhang) - t10 protection information support for nvme-rdma and nvmet-rdma (Israel Rukshin and Max Gurtovoy) - target side AEN improvements (Chaitanya Kulkarni) - various fixes and minor improvements all over, icluding the nvme part of the lpfc driver" - Floppy code cleanup series (Willy, Denis) - Floppy contention fix (Jiri) - Loop CONFIGURE support (Martijn) - bcache fixes/improvements (Coly, Joe, Colin) - q->queuedata cleanups (Christoph) - Get rid of ioctl_by_bdev (Christoph, Stefan) - md/raid5 allocation fixes (Coly) - zero length array fixes (Gustavo) - swim3 task state fix (Xu)" * tag 'for-5.8/drivers-2020-06-01' of git://git.kernel.dk/linux-block: (166 commits) bcache: configure the asynchronous registertion to be experimental bcache: asynchronous devices registration bcache: fix refcount underflow in bcache_device_free() bcache: Convert pr_<level> uses to a more typical style bcache: remove redundant variables i and n lpfc: Fix return value in __lpfc_nvme_ls_abort lpfc: fix axchg pointer reference after free and double frees lpfc: Fix pointer checks and comments in LS receive refactoring nvme: set dma alignment to qword nvmet: cleanups the loop in nvmet_async_events_process nvmet: fix memory leak when removing namespaces and controllers concurrently nvmet-rdma: add metadata/T10-PI support nvmet: add metadata support for block devices nvmet: add metadata/T10-PI support nvme: add Metadata Capabilities enumerations nvmet: rename nvmet_check_data_len to nvmet_check_transfer_len nvmet: rename nvmet_rw_len to nvmet_rw_data_len nvmet: add metadata characteristics for a namespace nvme-rdma: add metadata/T10-PI support nvme-rdma: introduce nvme_rdma_sgl structure ...
461 lines
12 KiB
C
461 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* NVMe I/O command implementation.
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* Copyright (c) 2015-2016 HGST, a Western Digital Company.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/blkdev.h>
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#include <linux/module.h>
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#include "nvmet.h"
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void nvmet_bdev_set_limits(struct block_device *bdev, struct nvme_id_ns *id)
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{
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const struct queue_limits *ql = &bdev_get_queue(bdev)->limits;
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/* Number of logical blocks per physical block. */
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const u32 lpp = ql->physical_block_size / ql->logical_block_size;
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/* Logical blocks per physical block, 0's based. */
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const __le16 lpp0b = to0based(lpp);
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/*
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* For NVMe 1.2 and later, bit 1 indicates that the fields NAWUN,
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* NAWUPF, and NACWU are defined for this namespace and should be
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* used by the host for this namespace instead of the AWUN, AWUPF,
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* and ACWU fields in the Identify Controller data structure. If
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* any of these fields are zero that means that the corresponding
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* field from the identify controller data structure should be used.
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*/
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id->nsfeat |= 1 << 1;
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id->nawun = lpp0b;
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id->nawupf = lpp0b;
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id->nacwu = lpp0b;
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/*
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* Bit 4 indicates that the fields NPWG, NPWA, NPDG, NPDA, and
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* NOWS are defined for this namespace and should be used by
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* the host for I/O optimization.
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*/
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id->nsfeat |= 1 << 4;
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/* NPWG = Namespace Preferred Write Granularity. 0's based */
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id->npwg = lpp0b;
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/* NPWA = Namespace Preferred Write Alignment. 0's based */
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id->npwa = id->npwg;
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/* NPDG = Namespace Preferred Deallocate Granularity. 0's based */
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id->npdg = to0based(ql->discard_granularity / ql->logical_block_size);
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/* NPDG = Namespace Preferred Deallocate Alignment */
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id->npda = id->npdg;
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/* NOWS = Namespace Optimal Write Size */
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id->nows = to0based(ql->io_opt / ql->logical_block_size);
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}
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static void nvmet_bdev_ns_enable_integrity(struct nvmet_ns *ns)
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{
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struct blk_integrity *bi = bdev_get_integrity(ns->bdev);
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if (bi) {
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ns->metadata_size = bi->tuple_size;
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if (bi->profile == &t10_pi_type1_crc)
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ns->pi_type = NVME_NS_DPS_PI_TYPE1;
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else if (bi->profile == &t10_pi_type3_crc)
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ns->pi_type = NVME_NS_DPS_PI_TYPE3;
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else
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/* Unsupported metadata type */
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ns->metadata_size = 0;
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}
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}
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int nvmet_bdev_ns_enable(struct nvmet_ns *ns)
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{
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int ret;
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ns->bdev = blkdev_get_by_path(ns->device_path,
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FMODE_READ | FMODE_WRITE, NULL);
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if (IS_ERR(ns->bdev)) {
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ret = PTR_ERR(ns->bdev);
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if (ret != -ENOTBLK) {
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pr_err("failed to open block device %s: (%ld)\n",
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ns->device_path, PTR_ERR(ns->bdev));
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}
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ns->bdev = NULL;
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return ret;
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}
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ns->size = i_size_read(ns->bdev->bd_inode);
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ns->blksize_shift = blksize_bits(bdev_logical_block_size(ns->bdev));
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ns->pi_type = 0;
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ns->metadata_size = 0;
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if (IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY_T10))
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nvmet_bdev_ns_enable_integrity(ns);
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return 0;
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}
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void nvmet_bdev_ns_disable(struct nvmet_ns *ns)
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{
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if (ns->bdev) {
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blkdev_put(ns->bdev, FMODE_WRITE | FMODE_READ);
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ns->bdev = NULL;
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}
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}
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void nvmet_bdev_ns_revalidate(struct nvmet_ns *ns)
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{
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ns->size = i_size_read(ns->bdev->bd_inode);
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}
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static u16 blk_to_nvme_status(struct nvmet_req *req, blk_status_t blk_sts)
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{
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u16 status = NVME_SC_SUCCESS;
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if (likely(blk_sts == BLK_STS_OK))
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return status;
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/*
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* Right now there exists M : 1 mapping between block layer error
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* to the NVMe status code (see nvme_error_status()). For consistency,
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* when we reverse map we use most appropriate NVMe Status code from
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* the group of the NVMe staus codes used in the nvme_error_status().
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*/
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switch (blk_sts) {
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case BLK_STS_NOSPC:
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status = NVME_SC_CAP_EXCEEDED | NVME_SC_DNR;
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req->error_loc = offsetof(struct nvme_rw_command, length);
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break;
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case BLK_STS_TARGET:
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status = NVME_SC_LBA_RANGE | NVME_SC_DNR;
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req->error_loc = offsetof(struct nvme_rw_command, slba);
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break;
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case BLK_STS_NOTSUPP:
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req->error_loc = offsetof(struct nvme_common_command, opcode);
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switch (req->cmd->common.opcode) {
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case nvme_cmd_dsm:
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case nvme_cmd_write_zeroes:
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status = NVME_SC_ONCS_NOT_SUPPORTED | NVME_SC_DNR;
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break;
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default:
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status = NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
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}
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break;
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case BLK_STS_MEDIUM:
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status = NVME_SC_ACCESS_DENIED;
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req->error_loc = offsetof(struct nvme_rw_command, nsid);
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break;
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case BLK_STS_IOERR:
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/* fallthru */
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default:
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status = NVME_SC_INTERNAL | NVME_SC_DNR;
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req->error_loc = offsetof(struct nvme_common_command, opcode);
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}
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switch (req->cmd->common.opcode) {
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case nvme_cmd_read:
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case nvme_cmd_write:
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req->error_slba = le64_to_cpu(req->cmd->rw.slba);
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break;
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case nvme_cmd_write_zeroes:
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req->error_slba =
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le64_to_cpu(req->cmd->write_zeroes.slba);
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break;
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default:
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req->error_slba = 0;
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}
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return status;
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}
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static void nvmet_bio_done(struct bio *bio)
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{
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struct nvmet_req *req = bio->bi_private;
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nvmet_req_complete(req, blk_to_nvme_status(req, bio->bi_status));
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if (bio != &req->b.inline_bio)
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bio_put(bio);
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}
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#ifdef CONFIG_BLK_DEV_INTEGRITY
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static int nvmet_bdev_alloc_bip(struct nvmet_req *req, struct bio *bio,
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struct sg_mapping_iter *miter)
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{
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struct blk_integrity *bi;
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struct bio_integrity_payload *bip;
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struct block_device *bdev = req->ns->bdev;
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int rc;
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size_t resid, len;
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bi = bdev_get_integrity(bdev);
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if (unlikely(!bi)) {
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pr_err("Unable to locate bio_integrity\n");
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return -ENODEV;
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}
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bip = bio_integrity_alloc(bio, GFP_NOIO,
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min_t(unsigned int, req->metadata_sg_cnt, BIO_MAX_PAGES));
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if (IS_ERR(bip)) {
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pr_err("Unable to allocate bio_integrity_payload\n");
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return PTR_ERR(bip);
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}
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bip->bip_iter.bi_size = bio_integrity_bytes(bi, bio_sectors(bio));
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/* virtual start sector must be in integrity interval units */
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bip_set_seed(bip, bio->bi_iter.bi_sector >>
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(bi->interval_exp - SECTOR_SHIFT));
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resid = bip->bip_iter.bi_size;
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while (resid > 0 && sg_miter_next(miter)) {
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len = min_t(size_t, miter->length, resid);
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rc = bio_integrity_add_page(bio, miter->page, len,
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offset_in_page(miter->addr));
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if (unlikely(rc != len)) {
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pr_err("bio_integrity_add_page() failed; %d\n", rc);
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sg_miter_stop(miter);
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return -ENOMEM;
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}
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resid -= len;
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if (len < miter->length)
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miter->consumed -= miter->length - len;
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}
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sg_miter_stop(miter);
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return 0;
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}
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#else
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static int nvmet_bdev_alloc_bip(struct nvmet_req *req, struct bio *bio,
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struct sg_mapping_iter *miter)
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{
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return -EINVAL;
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}
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#endif /* CONFIG_BLK_DEV_INTEGRITY */
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static void nvmet_bdev_execute_rw(struct nvmet_req *req)
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{
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int sg_cnt = req->sg_cnt;
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struct bio *bio;
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struct scatterlist *sg;
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struct blk_plug plug;
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sector_t sector;
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int op, i, rc;
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struct sg_mapping_iter prot_miter;
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unsigned int iter_flags;
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unsigned int total_len = nvmet_rw_data_len(req) + req->metadata_len;
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if (!nvmet_check_transfer_len(req, total_len))
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return;
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if (!req->sg_cnt) {
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nvmet_req_complete(req, 0);
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return;
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}
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if (req->cmd->rw.opcode == nvme_cmd_write) {
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op = REQ_OP_WRITE | REQ_SYNC | REQ_IDLE;
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if (req->cmd->rw.control & cpu_to_le16(NVME_RW_FUA))
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op |= REQ_FUA;
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iter_flags = SG_MITER_TO_SG;
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} else {
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op = REQ_OP_READ;
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iter_flags = SG_MITER_FROM_SG;
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}
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if (is_pci_p2pdma_page(sg_page(req->sg)))
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op |= REQ_NOMERGE;
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sector = le64_to_cpu(req->cmd->rw.slba);
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sector <<= (req->ns->blksize_shift - 9);
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if (req->transfer_len <= NVMET_MAX_INLINE_DATA_LEN) {
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bio = &req->b.inline_bio;
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bio_init(bio, req->inline_bvec, ARRAY_SIZE(req->inline_bvec));
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} else {
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bio = bio_alloc(GFP_KERNEL, min(sg_cnt, BIO_MAX_PAGES));
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}
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bio_set_dev(bio, req->ns->bdev);
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bio->bi_iter.bi_sector = sector;
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bio->bi_private = req;
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bio->bi_end_io = nvmet_bio_done;
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bio->bi_opf = op;
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blk_start_plug(&plug);
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if (req->metadata_len)
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sg_miter_start(&prot_miter, req->metadata_sg,
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req->metadata_sg_cnt, iter_flags);
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for_each_sg(req->sg, sg, req->sg_cnt, i) {
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while (bio_add_page(bio, sg_page(sg), sg->length, sg->offset)
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!= sg->length) {
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struct bio *prev = bio;
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if (req->metadata_len) {
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rc = nvmet_bdev_alloc_bip(req, bio,
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&prot_miter);
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if (unlikely(rc)) {
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bio_io_error(bio);
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return;
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}
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}
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bio = bio_alloc(GFP_KERNEL, min(sg_cnt, BIO_MAX_PAGES));
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bio_set_dev(bio, req->ns->bdev);
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bio->bi_iter.bi_sector = sector;
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bio->bi_opf = op;
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bio_chain(bio, prev);
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submit_bio(prev);
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}
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sector += sg->length >> 9;
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sg_cnt--;
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}
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if (req->metadata_len) {
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rc = nvmet_bdev_alloc_bip(req, bio, &prot_miter);
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if (unlikely(rc)) {
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bio_io_error(bio);
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return;
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}
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}
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submit_bio(bio);
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blk_finish_plug(&plug);
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}
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static void nvmet_bdev_execute_flush(struct nvmet_req *req)
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{
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struct bio *bio = &req->b.inline_bio;
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if (!nvmet_check_transfer_len(req, 0))
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return;
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bio_init(bio, req->inline_bvec, ARRAY_SIZE(req->inline_bvec));
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bio_set_dev(bio, req->ns->bdev);
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bio->bi_private = req;
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bio->bi_end_io = nvmet_bio_done;
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bio->bi_opf = REQ_OP_WRITE | REQ_PREFLUSH;
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submit_bio(bio);
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}
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u16 nvmet_bdev_flush(struct nvmet_req *req)
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{
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if (blkdev_issue_flush(req->ns->bdev, GFP_KERNEL))
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return NVME_SC_INTERNAL | NVME_SC_DNR;
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return 0;
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}
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static u16 nvmet_bdev_discard_range(struct nvmet_req *req,
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struct nvme_dsm_range *range, struct bio **bio)
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{
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struct nvmet_ns *ns = req->ns;
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int ret;
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ret = __blkdev_issue_discard(ns->bdev,
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le64_to_cpu(range->slba) << (ns->blksize_shift - 9),
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le32_to_cpu(range->nlb) << (ns->blksize_shift - 9),
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GFP_KERNEL, 0, bio);
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if (ret && ret != -EOPNOTSUPP) {
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req->error_slba = le64_to_cpu(range->slba);
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return errno_to_nvme_status(req, ret);
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}
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return NVME_SC_SUCCESS;
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}
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static void nvmet_bdev_execute_discard(struct nvmet_req *req)
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{
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struct nvme_dsm_range range;
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struct bio *bio = NULL;
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int i;
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u16 status;
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for (i = 0; i <= le32_to_cpu(req->cmd->dsm.nr); i++) {
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status = nvmet_copy_from_sgl(req, i * sizeof(range), &range,
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sizeof(range));
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if (status)
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break;
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status = nvmet_bdev_discard_range(req, &range, &bio);
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if (status)
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break;
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}
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if (bio) {
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bio->bi_private = req;
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bio->bi_end_io = nvmet_bio_done;
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if (status)
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bio_io_error(bio);
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else
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submit_bio(bio);
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} else {
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nvmet_req_complete(req, status);
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}
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}
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static void nvmet_bdev_execute_dsm(struct nvmet_req *req)
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{
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if (!nvmet_check_data_len_lte(req, nvmet_dsm_len(req)))
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return;
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switch (le32_to_cpu(req->cmd->dsm.attributes)) {
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case NVME_DSMGMT_AD:
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nvmet_bdev_execute_discard(req);
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return;
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case NVME_DSMGMT_IDR:
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case NVME_DSMGMT_IDW:
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default:
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/* Not supported yet */
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nvmet_req_complete(req, 0);
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return;
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}
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}
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static void nvmet_bdev_execute_write_zeroes(struct nvmet_req *req)
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{
|
|
struct nvme_write_zeroes_cmd *write_zeroes = &req->cmd->write_zeroes;
|
|
struct bio *bio = NULL;
|
|
sector_t sector;
|
|
sector_t nr_sector;
|
|
int ret;
|
|
|
|
if (!nvmet_check_transfer_len(req, 0))
|
|
return;
|
|
|
|
sector = le64_to_cpu(write_zeroes->slba) <<
|
|
(req->ns->blksize_shift - 9);
|
|
nr_sector = (((sector_t)le16_to_cpu(write_zeroes->length) + 1) <<
|
|
(req->ns->blksize_shift - 9));
|
|
|
|
ret = __blkdev_issue_zeroout(req->ns->bdev, sector, nr_sector,
|
|
GFP_KERNEL, &bio, 0);
|
|
if (bio) {
|
|
bio->bi_private = req;
|
|
bio->bi_end_io = nvmet_bio_done;
|
|
submit_bio(bio);
|
|
} else {
|
|
nvmet_req_complete(req, errno_to_nvme_status(req, ret));
|
|
}
|
|
}
|
|
|
|
u16 nvmet_bdev_parse_io_cmd(struct nvmet_req *req)
|
|
{
|
|
struct nvme_command *cmd = req->cmd;
|
|
|
|
switch (cmd->common.opcode) {
|
|
case nvme_cmd_read:
|
|
case nvme_cmd_write:
|
|
req->execute = nvmet_bdev_execute_rw;
|
|
if (req->sq->ctrl->pi_support && nvmet_ns_has_pi(req->ns))
|
|
req->metadata_len = nvmet_rw_metadata_len(req);
|
|
return 0;
|
|
case nvme_cmd_flush:
|
|
req->execute = nvmet_bdev_execute_flush;
|
|
return 0;
|
|
case nvme_cmd_dsm:
|
|
req->execute = nvmet_bdev_execute_dsm;
|
|
return 0;
|
|
case nvme_cmd_write_zeroes:
|
|
req->execute = nvmet_bdev_execute_write_zeroes;
|
|
return 0;
|
|
default:
|
|
pr_err("unhandled cmd %d on qid %d\n", cmd->common.opcode,
|
|
req->sq->qid);
|
|
req->error_loc = offsetof(struct nvme_common_command, opcode);
|
|
return NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
|
|
}
|
|
}
|