1d5eff33eSChaitanya Kulkarni // SPDX-License-Identifier: GPL-2.0 2d5eff33eSChaitanya Kulkarni /* 3d5eff33eSChaitanya Kulkarni * NVMe Over Fabrics Target File I/O commands implementation. 4d5eff33eSChaitanya Kulkarni * Copyright (c) 2017-2018 Western Digital Corporation or its 5d5eff33eSChaitanya Kulkarni * affiliates. 6d5eff33eSChaitanya Kulkarni */ 7d5eff33eSChaitanya Kulkarni #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 8d5eff33eSChaitanya Kulkarni #include <linux/uio.h> 9d5eff33eSChaitanya Kulkarni #include <linux/falloc.h> 10d5eff33eSChaitanya Kulkarni #include <linux/file.h> 11d5eff33eSChaitanya Kulkarni #include "nvmet.h" 12d5eff33eSChaitanya Kulkarni 13d5eff33eSChaitanya Kulkarni #define NVMET_MAX_MPOOL_BVEC 16 14d5eff33eSChaitanya Kulkarni #define NVMET_MIN_MPOOL_OBJ 16 15d5eff33eSChaitanya Kulkarni 16e8cd1ff1SAnthony Iliopoulos int nvmet_file_ns_revalidate(struct nvmet_ns *ns) 17e8cd1ff1SAnthony Iliopoulos { 18e8cd1ff1SAnthony Iliopoulos struct kstat stat; 19e8cd1ff1SAnthony Iliopoulos int ret; 20e8cd1ff1SAnthony Iliopoulos 21e8cd1ff1SAnthony Iliopoulos ret = vfs_getattr(&ns->file->f_path, &stat, STATX_SIZE, 22e8cd1ff1SAnthony Iliopoulos AT_STATX_FORCE_SYNC); 23e8cd1ff1SAnthony Iliopoulos if (!ret) 24e8cd1ff1SAnthony Iliopoulos ns->size = stat.size; 25e8cd1ff1SAnthony Iliopoulos return ret; 26e8cd1ff1SAnthony Iliopoulos } 27e8cd1ff1SAnthony Iliopoulos 28d5eff33eSChaitanya Kulkarni void nvmet_file_ns_disable(struct nvmet_ns *ns) 29d5eff33eSChaitanya Kulkarni { 30d5eff33eSChaitanya Kulkarni if (ns->file) { 3155eb942eSChaitanya Kulkarni if (ns->buffered_io) 3255eb942eSChaitanya Kulkarni flush_workqueue(buffered_io_wq); 33d5eff33eSChaitanya Kulkarni mempool_destroy(ns->bvec_pool); 34d5eff33eSChaitanya Kulkarni ns->bvec_pool = NULL; 35d5eff33eSChaitanya Kulkarni kmem_cache_destroy(ns->bvec_cache); 36d5eff33eSChaitanya Kulkarni ns->bvec_cache = NULL; 37d5eff33eSChaitanya Kulkarni fput(ns->file); 38d5eff33eSChaitanya Kulkarni ns->file = NULL; 39d5eff33eSChaitanya Kulkarni } 40d5eff33eSChaitanya Kulkarni } 41d5eff33eSChaitanya Kulkarni 42d5eff33eSChaitanya Kulkarni int nvmet_file_ns_enable(struct nvmet_ns *ns) 43d5eff33eSChaitanya Kulkarni { 4455eb942eSChaitanya Kulkarni int flags = O_RDWR | O_LARGEFILE; 4555eb942eSChaitanya Kulkarni int ret; 46d5eff33eSChaitanya Kulkarni 4755eb942eSChaitanya Kulkarni if (!ns->buffered_io) 4855eb942eSChaitanya Kulkarni flags |= O_DIRECT; 4955eb942eSChaitanya Kulkarni 5055eb942eSChaitanya Kulkarni ns->file = filp_open(ns->device_path, flags, 0); 51d5eff33eSChaitanya Kulkarni if (IS_ERR(ns->file)) { 52*85428beaSDaniel Wagner ret = PTR_ERR(ns->file); 53*85428beaSDaniel Wagner pr_err("failed to open file %s: (%d)\n", 54*85428beaSDaniel Wagner ns->device_path, ret); 55*85428beaSDaniel Wagner ns->file = NULL; 56*85428beaSDaniel Wagner return ret; 57d5eff33eSChaitanya Kulkarni } 58d5eff33eSChaitanya Kulkarni 59e8cd1ff1SAnthony Iliopoulos ret = nvmet_file_ns_revalidate(ns); 60d5eff33eSChaitanya Kulkarni if (ret) 61d5eff33eSChaitanya Kulkarni goto err; 62d5eff33eSChaitanya Kulkarni 63525ec495SSagi Grimberg /* 64525ec495SSagi Grimberg * i_blkbits can be greater than the universally accepted upper bound, 65525ec495SSagi Grimberg * so make sure we export a sane namespace lba_shift. 66525ec495SSagi Grimberg */ 67525ec495SSagi Grimberg ns->blksize_shift = min_t(u8, 68525ec495SSagi Grimberg file_inode(ns->file)->i_blkbits, 12); 69d5eff33eSChaitanya Kulkarni 70d5eff33eSChaitanya Kulkarni ns->bvec_cache = kmem_cache_create("nvmet-bvec", 71d5eff33eSChaitanya Kulkarni NVMET_MAX_MPOOL_BVEC * sizeof(struct bio_vec), 72d5eff33eSChaitanya Kulkarni 0, SLAB_HWCACHE_ALIGN, NULL); 731367bc82SWei Yongjun if (!ns->bvec_cache) { 741367bc82SWei Yongjun ret = -ENOMEM; 75d5eff33eSChaitanya Kulkarni goto err; 761367bc82SWei Yongjun } 77d5eff33eSChaitanya Kulkarni 78d5eff33eSChaitanya Kulkarni ns->bvec_pool = mempool_create(NVMET_MIN_MPOOL_OBJ, mempool_alloc_slab, 79d5eff33eSChaitanya Kulkarni mempool_free_slab, ns->bvec_cache); 80d5eff33eSChaitanya Kulkarni 811367bc82SWei Yongjun if (!ns->bvec_pool) { 821367bc82SWei Yongjun ret = -ENOMEM; 83d5eff33eSChaitanya Kulkarni goto err; 841367bc82SWei Yongjun } 85d5eff33eSChaitanya Kulkarni 86d5eff33eSChaitanya Kulkarni return ret; 87d5eff33eSChaitanya Kulkarni err: 88d5eff33eSChaitanya Kulkarni ns->size = 0; 89d5eff33eSChaitanya Kulkarni ns->blksize_shift = 0; 90d5eff33eSChaitanya Kulkarni nvmet_file_ns_disable(ns); 91d5eff33eSChaitanya Kulkarni return ret; 92d5eff33eSChaitanya Kulkarni } 93d5eff33eSChaitanya Kulkarni 9402db9954SMing Lei static void nvmet_file_init_bvec(struct bio_vec *bv, struct scatterlist *sg) 95d5eff33eSChaitanya Kulkarni { 9602db9954SMing Lei bv->bv_page = sg_page(sg); 9702db9954SMing Lei bv->bv_offset = sg->offset; 9802db9954SMing Lei bv->bv_len = sg->length; 99d5eff33eSChaitanya Kulkarni } 100d5eff33eSChaitanya Kulkarni 101d5eff33eSChaitanya Kulkarni static ssize_t nvmet_file_submit_bvec(struct nvmet_req *req, loff_t pos, 10250a909dbSChaitanya Kulkarni unsigned long nr_segs, size_t count, int ki_flags) 103d5eff33eSChaitanya Kulkarni { 104d5eff33eSChaitanya Kulkarni struct kiocb *iocb = &req->f.iocb; 105d5eff33eSChaitanya Kulkarni ssize_t (*call_iter)(struct kiocb *iocb, struct iov_iter *iter); 106d5eff33eSChaitanya Kulkarni struct iov_iter iter; 10750a909dbSChaitanya Kulkarni int rw; 108d5eff33eSChaitanya Kulkarni 109d5eff33eSChaitanya Kulkarni if (req->cmd->rw.opcode == nvme_cmd_write) { 110d5eff33eSChaitanya Kulkarni if (req->cmd->rw.control & cpu_to_le16(NVME_RW_FUA)) 11150a909dbSChaitanya Kulkarni ki_flags |= IOCB_DSYNC; 112d5eff33eSChaitanya Kulkarni call_iter = req->ns->file->f_op->write_iter; 113d5eff33eSChaitanya Kulkarni rw = WRITE; 114d5eff33eSChaitanya Kulkarni } else { 115d5eff33eSChaitanya Kulkarni call_iter = req->ns->file->f_op->read_iter; 116d5eff33eSChaitanya Kulkarni rw = READ; 117d5eff33eSChaitanya Kulkarni } 118d5eff33eSChaitanya Kulkarni 119aa563d7bSDavid Howells iov_iter_bvec(&iter, rw, req->f.bvec, nr_segs, count); 120d5eff33eSChaitanya Kulkarni 121d5eff33eSChaitanya Kulkarni iocb->ki_pos = pos; 122d5eff33eSChaitanya Kulkarni iocb->ki_filp = req->ns->file; 12355eb942eSChaitanya Kulkarni iocb->ki_flags = ki_flags | iocb_flags(req->ns->file); 124d5eff33eSChaitanya Kulkarni 12550a909dbSChaitanya Kulkarni return call_iter(iocb, &iter); 126d5eff33eSChaitanya Kulkarni } 127d5eff33eSChaitanya Kulkarni 128d5eff33eSChaitanya Kulkarni static void nvmet_file_io_done(struct kiocb *iocb, long ret, long ret2) 129d5eff33eSChaitanya Kulkarni { 130d5eff33eSChaitanya Kulkarni struct nvmet_req *req = container_of(iocb, struct nvmet_req, f.iocb); 131c6aa3542SChaitanya Kulkarni u16 status = NVME_SC_SUCCESS; 132d5eff33eSChaitanya Kulkarni 133d5eff33eSChaitanya Kulkarni if (req->f.bvec != req->inline_bvec) { 134d5eff33eSChaitanya Kulkarni if (likely(req->f.mpool_alloc == false)) 135d5eff33eSChaitanya Kulkarni kfree(req->f.bvec); 136d5eff33eSChaitanya Kulkarni else 137d5eff33eSChaitanya Kulkarni mempool_free(req->f.bvec, req->ns->bvec_pool); 138d5eff33eSChaitanya Kulkarni } 139d5eff33eSChaitanya Kulkarni 140e9061c39SChristoph Hellwig if (unlikely(ret != req->transfer_len)) 141c6aa3542SChaitanya Kulkarni status = errno_to_nvme_status(req, ret); 142c6aa3542SChaitanya Kulkarni nvmet_req_complete(req, status); 143d5eff33eSChaitanya Kulkarni } 144d5eff33eSChaitanya Kulkarni 14550a909dbSChaitanya Kulkarni static bool nvmet_file_execute_io(struct nvmet_req *req, int ki_flags) 146d5eff33eSChaitanya Kulkarni { 14702db9954SMing Lei ssize_t nr_bvec = req->sg_cnt; 148d5eff33eSChaitanya Kulkarni unsigned long bv_cnt = 0; 149d5eff33eSChaitanya Kulkarni bool is_sync = false; 150d5eff33eSChaitanya Kulkarni size_t len = 0, total_len = 0; 151d5eff33eSChaitanya Kulkarni ssize_t ret = 0; 152d5eff33eSChaitanya Kulkarni loff_t pos; 15302db9954SMing Lei int i; 15402db9954SMing Lei struct scatterlist *sg; 15550a909dbSChaitanya Kulkarni 15650a909dbSChaitanya Kulkarni if (req->f.mpool_alloc && nr_bvec > NVMET_MAX_MPOOL_BVEC) 15750a909dbSChaitanya Kulkarni is_sync = true; 158d5eff33eSChaitanya Kulkarni 1599c891c13SSagi Grimberg pos = le64_to_cpu(req->cmd->rw.slba) << req->ns->blksize_shift; 160e9061c39SChristoph Hellwig if (unlikely(pos + req->transfer_len > req->ns->size)) { 161c6aa3542SChaitanya Kulkarni nvmet_req_complete(req, errno_to_nvme_status(req, -ENOSPC)); 16250a909dbSChaitanya Kulkarni return true; 163d5eff33eSChaitanya Kulkarni } 164d5eff33eSChaitanya Kulkarni 165d5eff33eSChaitanya Kulkarni memset(&req->f.iocb, 0, sizeof(struct kiocb)); 16602db9954SMing Lei for_each_sg(req->sg, sg, req->sg_cnt, i) { 16702db9954SMing Lei nvmet_file_init_bvec(&req->f.bvec[bv_cnt], sg); 168d5eff33eSChaitanya Kulkarni len += req->f.bvec[bv_cnt].bv_len; 169d5eff33eSChaitanya Kulkarni total_len += req->f.bvec[bv_cnt].bv_len; 170d5eff33eSChaitanya Kulkarni bv_cnt++; 171d5eff33eSChaitanya Kulkarni 172d5eff33eSChaitanya Kulkarni WARN_ON_ONCE((nr_bvec - 1) < 0); 173d5eff33eSChaitanya Kulkarni 174d5eff33eSChaitanya Kulkarni if (unlikely(is_sync) && 175d5eff33eSChaitanya Kulkarni (nr_bvec - 1 == 0 || bv_cnt == NVMET_MAX_MPOOL_BVEC)) { 17650a909dbSChaitanya Kulkarni ret = nvmet_file_submit_bvec(req, pos, bv_cnt, len, 0); 177d5eff33eSChaitanya Kulkarni if (ret < 0) 17850a909dbSChaitanya Kulkarni goto complete; 17950a909dbSChaitanya Kulkarni 180d5eff33eSChaitanya Kulkarni pos += len; 181d5eff33eSChaitanya Kulkarni bv_cnt = 0; 182d5eff33eSChaitanya Kulkarni len = 0; 183d5eff33eSChaitanya Kulkarni } 184d5eff33eSChaitanya Kulkarni nr_bvec--; 185d5eff33eSChaitanya Kulkarni } 186d5eff33eSChaitanya Kulkarni 187e9061c39SChristoph Hellwig if (WARN_ON_ONCE(total_len != req->transfer_len)) { 188d5eff33eSChaitanya Kulkarni ret = -EIO; 18950a909dbSChaitanya Kulkarni goto complete; 190d5eff33eSChaitanya Kulkarni } 19150a909dbSChaitanya Kulkarni 19250a909dbSChaitanya Kulkarni if (unlikely(is_sync)) { 19350a909dbSChaitanya Kulkarni ret = total_len; 19450a909dbSChaitanya Kulkarni goto complete; 19550a909dbSChaitanya Kulkarni } 19650a909dbSChaitanya Kulkarni 19750a909dbSChaitanya Kulkarni /* 19850a909dbSChaitanya Kulkarni * A NULL ki_complete ask for synchronous execution, which we want 19950a909dbSChaitanya Kulkarni * for the IOCB_NOWAIT case. 20050a909dbSChaitanya Kulkarni */ 20150a909dbSChaitanya Kulkarni if (!(ki_flags & IOCB_NOWAIT)) 202d5eff33eSChaitanya Kulkarni req->f.iocb.ki_complete = nvmet_file_io_done; 20350a909dbSChaitanya Kulkarni 20450a909dbSChaitanya Kulkarni ret = nvmet_file_submit_bvec(req, pos, bv_cnt, total_len, ki_flags); 20550a909dbSChaitanya Kulkarni 20650a909dbSChaitanya Kulkarni switch (ret) { 20750a909dbSChaitanya Kulkarni case -EIOCBQUEUED: 20850a909dbSChaitanya Kulkarni return true; 20950a909dbSChaitanya Kulkarni case -EAGAIN: 21050a909dbSChaitanya Kulkarni if (WARN_ON_ONCE(!(ki_flags & IOCB_NOWAIT))) 21150a909dbSChaitanya Kulkarni goto complete; 21250a909dbSChaitanya Kulkarni return false; 21350a909dbSChaitanya Kulkarni case -EOPNOTSUPP: 21450a909dbSChaitanya Kulkarni /* 21550a909dbSChaitanya Kulkarni * For file systems returning error -EOPNOTSUPP, handle 21650a909dbSChaitanya Kulkarni * IOCB_NOWAIT error case separately and retry without 21750a909dbSChaitanya Kulkarni * IOCB_NOWAIT. 21850a909dbSChaitanya Kulkarni */ 21950a909dbSChaitanya Kulkarni if ((ki_flags & IOCB_NOWAIT)) 22050a909dbSChaitanya Kulkarni return false; 22150a909dbSChaitanya Kulkarni break; 22250a909dbSChaitanya Kulkarni } 22350a909dbSChaitanya Kulkarni 22450a909dbSChaitanya Kulkarni complete: 22550a909dbSChaitanya Kulkarni nvmet_file_io_done(&req->f.iocb, ret, 0); 22650a909dbSChaitanya Kulkarni return true; 227d5eff33eSChaitanya Kulkarni } 228d5eff33eSChaitanya Kulkarni 22955eb942eSChaitanya Kulkarni static void nvmet_file_buffered_io_work(struct work_struct *w) 23055eb942eSChaitanya Kulkarni { 23155eb942eSChaitanya Kulkarni struct nvmet_req *req = container_of(w, struct nvmet_req, f.work); 23255eb942eSChaitanya Kulkarni 23350a909dbSChaitanya Kulkarni nvmet_file_execute_io(req, 0); 23455eb942eSChaitanya Kulkarni } 23555eb942eSChaitanya Kulkarni 23650a909dbSChaitanya Kulkarni static void nvmet_file_submit_buffered_io(struct nvmet_req *req) 23755eb942eSChaitanya Kulkarni { 23855eb942eSChaitanya Kulkarni INIT_WORK(&req->f.work, nvmet_file_buffered_io_work); 23955eb942eSChaitanya Kulkarni queue_work(buffered_io_wq, &req->f.work); 24055eb942eSChaitanya Kulkarni } 24155eb942eSChaitanya Kulkarni 24250a909dbSChaitanya Kulkarni static void nvmet_file_execute_rw(struct nvmet_req *req) 24350a909dbSChaitanya Kulkarni { 24402db9954SMing Lei ssize_t nr_bvec = req->sg_cnt; 24550a909dbSChaitanya Kulkarni 246136cc1ffSIsrael Rukshin if (!nvmet_check_transfer_len(req, nvmet_rw_data_len(req))) 247e9061c39SChristoph Hellwig return; 248e9061c39SChristoph Hellwig 24950a909dbSChaitanya Kulkarni if (!req->sg_cnt || !nr_bvec) { 25050a909dbSChaitanya Kulkarni nvmet_req_complete(req, 0); 25150a909dbSChaitanya Kulkarni return; 25250a909dbSChaitanya Kulkarni } 25350a909dbSChaitanya Kulkarni 25450a909dbSChaitanya Kulkarni if (nr_bvec > NVMET_MAX_INLINE_BIOVEC) 25550a909dbSChaitanya Kulkarni req->f.bvec = kmalloc_array(nr_bvec, sizeof(struct bio_vec), 25650a909dbSChaitanya Kulkarni GFP_KERNEL); 25750a909dbSChaitanya Kulkarni else 25850a909dbSChaitanya Kulkarni req->f.bvec = req->inline_bvec; 25950a909dbSChaitanya Kulkarni 26050a909dbSChaitanya Kulkarni if (unlikely(!req->f.bvec)) { 26150a909dbSChaitanya Kulkarni /* fallback under memory pressure */ 26250a909dbSChaitanya Kulkarni req->f.bvec = mempool_alloc(req->ns->bvec_pool, GFP_KERNEL); 26350a909dbSChaitanya Kulkarni req->f.mpool_alloc = true; 26450a909dbSChaitanya Kulkarni } else 26550a909dbSChaitanya Kulkarni req->f.mpool_alloc = false; 26650a909dbSChaitanya Kulkarni 26750a909dbSChaitanya Kulkarni if (req->ns->buffered_io) { 26850a909dbSChaitanya Kulkarni if (likely(!req->f.mpool_alloc) && 26950a909dbSChaitanya Kulkarni nvmet_file_execute_io(req, IOCB_NOWAIT)) 27050a909dbSChaitanya Kulkarni return; 27150a909dbSChaitanya Kulkarni nvmet_file_submit_buffered_io(req); 27250a909dbSChaitanya Kulkarni } else 27350a909dbSChaitanya Kulkarni nvmet_file_execute_io(req, 0); 27450a909dbSChaitanya Kulkarni } 27550a909dbSChaitanya Kulkarni 276dedf0be5SChaitanya Kulkarni u16 nvmet_file_flush(struct nvmet_req *req) 277dedf0be5SChaitanya Kulkarni { 278c6aa3542SChaitanya Kulkarni return errno_to_nvme_status(req, vfs_fsync(req->ns->file, 1)); 279dedf0be5SChaitanya Kulkarni } 280dedf0be5SChaitanya Kulkarni 281d5eff33eSChaitanya Kulkarni static void nvmet_file_flush_work(struct work_struct *w) 282d5eff33eSChaitanya Kulkarni { 283d5eff33eSChaitanya Kulkarni struct nvmet_req *req = container_of(w, struct nvmet_req, f.work); 284d5eff33eSChaitanya Kulkarni 285dedf0be5SChaitanya Kulkarni nvmet_req_complete(req, nvmet_file_flush(req)); 286d5eff33eSChaitanya Kulkarni } 287d5eff33eSChaitanya Kulkarni 288d5eff33eSChaitanya Kulkarni static void nvmet_file_execute_flush(struct nvmet_req *req) 289d5eff33eSChaitanya Kulkarni { 290136cc1ffSIsrael Rukshin if (!nvmet_check_transfer_len(req, 0)) 291e9061c39SChristoph Hellwig return; 292d5eff33eSChaitanya Kulkarni INIT_WORK(&req->f.work, nvmet_file_flush_work); 293d5eff33eSChaitanya Kulkarni schedule_work(&req->f.work); 294d5eff33eSChaitanya Kulkarni } 295d5eff33eSChaitanya Kulkarni 296d5eff33eSChaitanya Kulkarni static void nvmet_file_execute_discard(struct nvmet_req *req) 297d5eff33eSChaitanya Kulkarni { 298d5eff33eSChaitanya Kulkarni int mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE; 299d5eff33eSChaitanya Kulkarni struct nvme_dsm_range range; 3001b72b71fSSagi Grimberg loff_t offset, len; 301c6aa3542SChaitanya Kulkarni u16 status = 0; 302c6aa3542SChaitanya Kulkarni int ret; 3031b72b71fSSagi Grimberg int i; 304d5eff33eSChaitanya Kulkarni 305d5eff33eSChaitanya Kulkarni for (i = 0; i <= le32_to_cpu(req->cmd->dsm.nr); i++) { 306c6aa3542SChaitanya Kulkarni status = nvmet_copy_from_sgl(req, i * sizeof(range), &range, 3071b72b71fSSagi Grimberg sizeof(range)); 308c6aa3542SChaitanya Kulkarni if (status) 309d5eff33eSChaitanya Kulkarni break; 3109c891c13SSagi Grimberg 311d5eff33eSChaitanya Kulkarni offset = le64_to_cpu(range.slba) << req->ns->blksize_shift; 3128eacd1bdSBart Van Assche len = le32_to_cpu(range.nlb); 3138eacd1bdSBart Van Assche len <<= req->ns->blksize_shift; 3149c891c13SSagi Grimberg if (offset + len > req->ns->size) { 315c6aa3542SChaitanya Kulkarni req->error_slba = le64_to_cpu(range.slba); 316c6aa3542SChaitanya Kulkarni status = errno_to_nvme_status(req, -ENOSPC); 3179c891c13SSagi Grimberg break; 3189c891c13SSagi Grimberg } 3199c891c13SSagi Grimberg 320c6aa3542SChaitanya Kulkarni ret = vfs_fallocate(req->ns->file, mode, offset, len); 321005c674fSChristoph Hellwig if (ret && ret != -EOPNOTSUPP) { 322c6aa3542SChaitanya Kulkarni req->error_slba = le64_to_cpu(range.slba); 323c6aa3542SChaitanya Kulkarni status = errno_to_nvme_status(req, ret); 324d5eff33eSChaitanya Kulkarni break; 325d5eff33eSChaitanya Kulkarni } 3261b72b71fSSagi Grimberg } 327d5eff33eSChaitanya Kulkarni 328c6aa3542SChaitanya Kulkarni nvmet_req_complete(req, status); 329d5eff33eSChaitanya Kulkarni } 330d5eff33eSChaitanya Kulkarni 331d5eff33eSChaitanya Kulkarni static void nvmet_file_dsm_work(struct work_struct *w) 332d5eff33eSChaitanya Kulkarni { 333d5eff33eSChaitanya Kulkarni struct nvmet_req *req = container_of(w, struct nvmet_req, f.work); 334d5eff33eSChaitanya Kulkarni 335d5eff33eSChaitanya Kulkarni switch (le32_to_cpu(req->cmd->dsm.attributes)) { 336d5eff33eSChaitanya Kulkarni case NVME_DSMGMT_AD: 337d5eff33eSChaitanya Kulkarni nvmet_file_execute_discard(req); 338d5eff33eSChaitanya Kulkarni return; 339d5eff33eSChaitanya Kulkarni case NVME_DSMGMT_IDR: 340d5eff33eSChaitanya Kulkarni case NVME_DSMGMT_IDW: 341d5eff33eSChaitanya Kulkarni default: 342d5eff33eSChaitanya Kulkarni /* Not supported yet */ 343d5eff33eSChaitanya Kulkarni nvmet_req_complete(req, 0); 344d5eff33eSChaitanya Kulkarni return; 345d5eff33eSChaitanya Kulkarni } 346d5eff33eSChaitanya Kulkarni } 347d5eff33eSChaitanya Kulkarni 348d5eff33eSChaitanya Kulkarni static void nvmet_file_execute_dsm(struct nvmet_req *req) 349d5eff33eSChaitanya Kulkarni { 350b716e688SSagi Grimberg if (!nvmet_check_data_len_lte(req, nvmet_dsm_len(req))) 351e9061c39SChristoph Hellwig return; 352d5eff33eSChaitanya Kulkarni INIT_WORK(&req->f.work, nvmet_file_dsm_work); 353d5eff33eSChaitanya Kulkarni schedule_work(&req->f.work); 354d5eff33eSChaitanya Kulkarni } 355d5eff33eSChaitanya Kulkarni 356d5eff33eSChaitanya Kulkarni static void nvmet_file_write_zeroes_work(struct work_struct *w) 357d5eff33eSChaitanya Kulkarni { 358d5eff33eSChaitanya Kulkarni struct nvmet_req *req = container_of(w, struct nvmet_req, f.work); 359d5eff33eSChaitanya Kulkarni struct nvme_write_zeroes_cmd *write_zeroes = &req->cmd->write_zeroes; 360d5eff33eSChaitanya Kulkarni int mode = FALLOC_FL_ZERO_RANGE | FALLOC_FL_KEEP_SIZE; 361d5eff33eSChaitanya Kulkarni loff_t offset; 362d5eff33eSChaitanya Kulkarni loff_t len; 363d5eff33eSChaitanya Kulkarni int ret; 364d5eff33eSChaitanya Kulkarni 365d5eff33eSChaitanya Kulkarni offset = le64_to_cpu(write_zeroes->slba) << req->ns->blksize_shift; 366d5eff33eSChaitanya Kulkarni len = (((sector_t)le16_to_cpu(write_zeroes->length) + 1) << 367d5eff33eSChaitanya Kulkarni req->ns->blksize_shift); 368d5eff33eSChaitanya Kulkarni 3699c891c13SSagi Grimberg if (unlikely(offset + len > req->ns->size)) { 370c6aa3542SChaitanya Kulkarni nvmet_req_complete(req, errno_to_nvme_status(req, -ENOSPC)); 3719c891c13SSagi Grimberg return; 3729c891c13SSagi Grimberg } 3739c891c13SSagi Grimberg 374d5eff33eSChaitanya Kulkarni ret = vfs_fallocate(req->ns->file, mode, offset, len); 375c6aa3542SChaitanya Kulkarni nvmet_req_complete(req, ret < 0 ? errno_to_nvme_status(req, ret) : 0); 376d5eff33eSChaitanya Kulkarni } 377d5eff33eSChaitanya Kulkarni 378d5eff33eSChaitanya Kulkarni static void nvmet_file_execute_write_zeroes(struct nvmet_req *req) 379d5eff33eSChaitanya Kulkarni { 380136cc1ffSIsrael Rukshin if (!nvmet_check_transfer_len(req, 0)) 381e9061c39SChristoph Hellwig return; 382d5eff33eSChaitanya Kulkarni INIT_WORK(&req->f.work, nvmet_file_write_zeroes_work); 383d5eff33eSChaitanya Kulkarni schedule_work(&req->f.work); 384d5eff33eSChaitanya Kulkarni } 385d5eff33eSChaitanya Kulkarni 386d5eff33eSChaitanya Kulkarni u16 nvmet_file_parse_io_cmd(struct nvmet_req *req) 387d5eff33eSChaitanya Kulkarni { 388d5eff33eSChaitanya Kulkarni struct nvme_command *cmd = req->cmd; 389d5eff33eSChaitanya Kulkarni 390d5eff33eSChaitanya Kulkarni switch (cmd->common.opcode) { 391d5eff33eSChaitanya Kulkarni case nvme_cmd_read: 392d5eff33eSChaitanya Kulkarni case nvme_cmd_write: 393d5eff33eSChaitanya Kulkarni req->execute = nvmet_file_execute_rw; 394d5eff33eSChaitanya Kulkarni return 0; 395d5eff33eSChaitanya Kulkarni case nvme_cmd_flush: 396d5eff33eSChaitanya Kulkarni req->execute = nvmet_file_execute_flush; 397d5eff33eSChaitanya Kulkarni return 0; 398d5eff33eSChaitanya Kulkarni case nvme_cmd_dsm: 399d5eff33eSChaitanya Kulkarni req->execute = nvmet_file_execute_dsm; 400d5eff33eSChaitanya Kulkarni return 0; 401d5eff33eSChaitanya Kulkarni case nvme_cmd_write_zeroes: 402d5eff33eSChaitanya Kulkarni req->execute = nvmet_file_execute_write_zeroes; 403d5eff33eSChaitanya Kulkarni return 0; 404d5eff33eSChaitanya Kulkarni default: 4051c2c7613SChaitanya Kulkarni return nvmet_report_invalid_opcode(req); 406d5eff33eSChaitanya Kulkarni } 407d5eff33eSChaitanya Kulkarni } 408