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)) { 52d5eff33eSChaitanya Kulkarni pr_err("failed to open file %s: (%ld)\n", 5381cf54e0SWei Yongjun ns->device_path, PTR_ERR(ns->file)); 54d5eff33eSChaitanya Kulkarni return PTR_ERR(ns->file); 55d5eff33eSChaitanya Kulkarni } 56d5eff33eSChaitanya Kulkarni 57e8cd1ff1SAnthony Iliopoulos ret = nvmet_file_ns_revalidate(ns); 58d5eff33eSChaitanya Kulkarni if (ret) 59d5eff33eSChaitanya Kulkarni goto err; 60d5eff33eSChaitanya Kulkarni 61525ec495SSagi Grimberg /* 62525ec495SSagi Grimberg * i_blkbits can be greater than the universally accepted upper bound, 63525ec495SSagi Grimberg * so make sure we export a sane namespace lba_shift. 64525ec495SSagi Grimberg */ 65525ec495SSagi Grimberg ns->blksize_shift = min_t(u8, 66525ec495SSagi Grimberg file_inode(ns->file)->i_blkbits, 12); 67d5eff33eSChaitanya Kulkarni 68d5eff33eSChaitanya Kulkarni ns->bvec_cache = kmem_cache_create("nvmet-bvec", 69d5eff33eSChaitanya Kulkarni NVMET_MAX_MPOOL_BVEC * sizeof(struct bio_vec), 70d5eff33eSChaitanya Kulkarni 0, SLAB_HWCACHE_ALIGN, NULL); 711367bc82SWei Yongjun if (!ns->bvec_cache) { 721367bc82SWei Yongjun ret = -ENOMEM; 73d5eff33eSChaitanya Kulkarni goto err; 741367bc82SWei Yongjun } 75d5eff33eSChaitanya Kulkarni 76d5eff33eSChaitanya Kulkarni ns->bvec_pool = mempool_create(NVMET_MIN_MPOOL_OBJ, mempool_alloc_slab, 77d5eff33eSChaitanya Kulkarni mempool_free_slab, ns->bvec_cache); 78d5eff33eSChaitanya Kulkarni 791367bc82SWei Yongjun if (!ns->bvec_pool) { 801367bc82SWei Yongjun ret = -ENOMEM; 81d5eff33eSChaitanya Kulkarni goto err; 821367bc82SWei Yongjun } 83d5eff33eSChaitanya Kulkarni 84d5eff33eSChaitanya Kulkarni return ret; 85d5eff33eSChaitanya Kulkarni err: 86d5eff33eSChaitanya Kulkarni ns->size = 0; 87d5eff33eSChaitanya Kulkarni ns->blksize_shift = 0; 88d5eff33eSChaitanya Kulkarni nvmet_file_ns_disable(ns); 89d5eff33eSChaitanya Kulkarni return ret; 90d5eff33eSChaitanya Kulkarni } 91d5eff33eSChaitanya Kulkarni 9202db9954SMing Lei static void nvmet_file_init_bvec(struct bio_vec *bv, struct scatterlist *sg) 93d5eff33eSChaitanya Kulkarni { 9402db9954SMing Lei bv->bv_page = sg_page(sg); 9502db9954SMing Lei bv->bv_offset = sg->offset; 9602db9954SMing Lei bv->bv_len = sg->length; 97d5eff33eSChaitanya Kulkarni } 98d5eff33eSChaitanya Kulkarni 99d5eff33eSChaitanya Kulkarni static ssize_t nvmet_file_submit_bvec(struct nvmet_req *req, loff_t pos, 10050a909dbSChaitanya Kulkarni unsigned long nr_segs, size_t count, int ki_flags) 101d5eff33eSChaitanya Kulkarni { 102d5eff33eSChaitanya Kulkarni struct kiocb *iocb = &req->f.iocb; 103d5eff33eSChaitanya Kulkarni ssize_t (*call_iter)(struct kiocb *iocb, struct iov_iter *iter); 104d5eff33eSChaitanya Kulkarni struct iov_iter iter; 10550a909dbSChaitanya Kulkarni int rw; 106d5eff33eSChaitanya Kulkarni 107d5eff33eSChaitanya Kulkarni if (req->cmd->rw.opcode == nvme_cmd_write) { 108d5eff33eSChaitanya Kulkarni if (req->cmd->rw.control & cpu_to_le16(NVME_RW_FUA)) 10950a909dbSChaitanya Kulkarni ki_flags |= IOCB_DSYNC; 110d5eff33eSChaitanya Kulkarni call_iter = req->ns->file->f_op->write_iter; 111d5eff33eSChaitanya Kulkarni rw = WRITE; 112d5eff33eSChaitanya Kulkarni } else { 113d5eff33eSChaitanya Kulkarni call_iter = req->ns->file->f_op->read_iter; 114d5eff33eSChaitanya Kulkarni rw = READ; 115d5eff33eSChaitanya Kulkarni } 116d5eff33eSChaitanya Kulkarni 117aa563d7bSDavid Howells iov_iter_bvec(&iter, rw, req->f.bvec, nr_segs, count); 118d5eff33eSChaitanya Kulkarni 119d5eff33eSChaitanya Kulkarni iocb->ki_pos = pos; 120d5eff33eSChaitanya Kulkarni iocb->ki_filp = req->ns->file; 12155eb942eSChaitanya Kulkarni iocb->ki_flags = ki_flags | iocb_flags(req->ns->file); 122d5eff33eSChaitanya Kulkarni 12350a909dbSChaitanya Kulkarni return call_iter(iocb, &iter); 124d5eff33eSChaitanya Kulkarni } 125d5eff33eSChaitanya Kulkarni 126d5eff33eSChaitanya Kulkarni static void nvmet_file_io_done(struct kiocb *iocb, long ret, long ret2) 127d5eff33eSChaitanya Kulkarni { 128d5eff33eSChaitanya Kulkarni struct nvmet_req *req = container_of(iocb, struct nvmet_req, f.iocb); 129c6aa3542SChaitanya Kulkarni u16 status = NVME_SC_SUCCESS; 130d5eff33eSChaitanya Kulkarni 131d5eff33eSChaitanya Kulkarni if (req->f.bvec != req->inline_bvec) { 132d5eff33eSChaitanya Kulkarni if (likely(req->f.mpool_alloc == false)) 133d5eff33eSChaitanya Kulkarni kfree(req->f.bvec); 134d5eff33eSChaitanya Kulkarni else 135d5eff33eSChaitanya Kulkarni mempool_free(req->f.bvec, req->ns->bvec_pool); 136d5eff33eSChaitanya Kulkarni } 137d5eff33eSChaitanya Kulkarni 138e9061c39SChristoph Hellwig if (unlikely(ret != req->transfer_len)) 139c6aa3542SChaitanya Kulkarni status = errno_to_nvme_status(req, ret); 140c6aa3542SChaitanya Kulkarni nvmet_req_complete(req, status); 141d5eff33eSChaitanya Kulkarni } 142d5eff33eSChaitanya Kulkarni 14350a909dbSChaitanya Kulkarni static bool nvmet_file_execute_io(struct nvmet_req *req, int ki_flags) 144d5eff33eSChaitanya Kulkarni { 14502db9954SMing Lei ssize_t nr_bvec = req->sg_cnt; 146d5eff33eSChaitanya Kulkarni unsigned long bv_cnt = 0; 147d5eff33eSChaitanya Kulkarni bool is_sync = false; 148d5eff33eSChaitanya Kulkarni size_t len = 0, total_len = 0; 149d5eff33eSChaitanya Kulkarni ssize_t ret = 0; 150d5eff33eSChaitanya Kulkarni loff_t pos; 15102db9954SMing Lei int i; 15202db9954SMing Lei struct scatterlist *sg; 15350a909dbSChaitanya Kulkarni 15450a909dbSChaitanya Kulkarni if (req->f.mpool_alloc && nr_bvec > NVMET_MAX_MPOOL_BVEC) 15550a909dbSChaitanya Kulkarni is_sync = true; 156d5eff33eSChaitanya Kulkarni 1579c891c13SSagi Grimberg pos = le64_to_cpu(req->cmd->rw.slba) << req->ns->blksize_shift; 158e9061c39SChristoph Hellwig if (unlikely(pos + req->transfer_len > req->ns->size)) { 159c6aa3542SChaitanya Kulkarni nvmet_req_complete(req, errno_to_nvme_status(req, -ENOSPC)); 16050a909dbSChaitanya Kulkarni return true; 161d5eff33eSChaitanya Kulkarni } 162d5eff33eSChaitanya Kulkarni 163d5eff33eSChaitanya Kulkarni memset(&req->f.iocb, 0, sizeof(struct kiocb)); 16402db9954SMing Lei for_each_sg(req->sg, sg, req->sg_cnt, i) { 16502db9954SMing Lei nvmet_file_init_bvec(&req->f.bvec[bv_cnt], sg); 166d5eff33eSChaitanya Kulkarni len += req->f.bvec[bv_cnt].bv_len; 167d5eff33eSChaitanya Kulkarni total_len += req->f.bvec[bv_cnt].bv_len; 168d5eff33eSChaitanya Kulkarni bv_cnt++; 169d5eff33eSChaitanya Kulkarni 170d5eff33eSChaitanya Kulkarni WARN_ON_ONCE((nr_bvec - 1) < 0); 171d5eff33eSChaitanya Kulkarni 172d5eff33eSChaitanya Kulkarni if (unlikely(is_sync) && 173d5eff33eSChaitanya Kulkarni (nr_bvec - 1 == 0 || bv_cnt == NVMET_MAX_MPOOL_BVEC)) { 17450a909dbSChaitanya Kulkarni ret = nvmet_file_submit_bvec(req, pos, bv_cnt, len, 0); 175d5eff33eSChaitanya Kulkarni if (ret < 0) 17650a909dbSChaitanya Kulkarni goto complete; 17750a909dbSChaitanya Kulkarni 178d5eff33eSChaitanya Kulkarni pos += len; 179d5eff33eSChaitanya Kulkarni bv_cnt = 0; 180d5eff33eSChaitanya Kulkarni len = 0; 181d5eff33eSChaitanya Kulkarni } 182d5eff33eSChaitanya Kulkarni nr_bvec--; 183d5eff33eSChaitanya Kulkarni } 184d5eff33eSChaitanya Kulkarni 185e9061c39SChristoph Hellwig if (WARN_ON_ONCE(total_len != req->transfer_len)) { 186d5eff33eSChaitanya Kulkarni ret = -EIO; 18750a909dbSChaitanya Kulkarni goto complete; 188d5eff33eSChaitanya Kulkarni } 18950a909dbSChaitanya Kulkarni 19050a909dbSChaitanya Kulkarni if (unlikely(is_sync)) { 19150a909dbSChaitanya Kulkarni ret = total_len; 19250a909dbSChaitanya Kulkarni goto complete; 19350a909dbSChaitanya Kulkarni } 19450a909dbSChaitanya Kulkarni 19550a909dbSChaitanya Kulkarni /* 19650a909dbSChaitanya Kulkarni * A NULL ki_complete ask for synchronous execution, which we want 19750a909dbSChaitanya Kulkarni * for the IOCB_NOWAIT case. 19850a909dbSChaitanya Kulkarni */ 19950a909dbSChaitanya Kulkarni if (!(ki_flags & IOCB_NOWAIT)) 200d5eff33eSChaitanya Kulkarni req->f.iocb.ki_complete = nvmet_file_io_done; 20150a909dbSChaitanya Kulkarni 20250a909dbSChaitanya Kulkarni ret = nvmet_file_submit_bvec(req, pos, bv_cnt, total_len, ki_flags); 20350a909dbSChaitanya Kulkarni 20450a909dbSChaitanya Kulkarni switch (ret) { 20550a909dbSChaitanya Kulkarni case -EIOCBQUEUED: 20650a909dbSChaitanya Kulkarni return true; 20750a909dbSChaitanya Kulkarni case -EAGAIN: 20850a909dbSChaitanya Kulkarni if (WARN_ON_ONCE(!(ki_flags & IOCB_NOWAIT))) 20950a909dbSChaitanya Kulkarni goto complete; 21050a909dbSChaitanya Kulkarni return false; 21150a909dbSChaitanya Kulkarni case -EOPNOTSUPP: 21250a909dbSChaitanya Kulkarni /* 21350a909dbSChaitanya Kulkarni * For file systems returning error -EOPNOTSUPP, handle 21450a909dbSChaitanya Kulkarni * IOCB_NOWAIT error case separately and retry without 21550a909dbSChaitanya Kulkarni * IOCB_NOWAIT. 21650a909dbSChaitanya Kulkarni */ 21750a909dbSChaitanya Kulkarni if ((ki_flags & IOCB_NOWAIT)) 21850a909dbSChaitanya Kulkarni return false; 21950a909dbSChaitanya Kulkarni break; 22050a909dbSChaitanya Kulkarni } 22150a909dbSChaitanya Kulkarni 22250a909dbSChaitanya Kulkarni complete: 22350a909dbSChaitanya Kulkarni nvmet_file_io_done(&req->f.iocb, ret, 0); 22450a909dbSChaitanya Kulkarni return true; 225d5eff33eSChaitanya Kulkarni } 226d5eff33eSChaitanya Kulkarni 22755eb942eSChaitanya Kulkarni static void nvmet_file_buffered_io_work(struct work_struct *w) 22855eb942eSChaitanya Kulkarni { 22955eb942eSChaitanya Kulkarni struct nvmet_req *req = container_of(w, struct nvmet_req, f.work); 23055eb942eSChaitanya Kulkarni 23150a909dbSChaitanya Kulkarni nvmet_file_execute_io(req, 0); 23255eb942eSChaitanya Kulkarni } 23355eb942eSChaitanya Kulkarni 23450a909dbSChaitanya Kulkarni static void nvmet_file_submit_buffered_io(struct nvmet_req *req) 23555eb942eSChaitanya Kulkarni { 23655eb942eSChaitanya Kulkarni INIT_WORK(&req->f.work, nvmet_file_buffered_io_work); 23755eb942eSChaitanya Kulkarni queue_work(buffered_io_wq, &req->f.work); 23855eb942eSChaitanya Kulkarni } 23955eb942eSChaitanya Kulkarni 24050a909dbSChaitanya Kulkarni static void nvmet_file_execute_rw(struct nvmet_req *req) 24150a909dbSChaitanya Kulkarni { 24202db9954SMing Lei ssize_t nr_bvec = req->sg_cnt; 24350a909dbSChaitanya Kulkarni 244136cc1ffSIsrael Rukshin if (!nvmet_check_transfer_len(req, nvmet_rw_data_len(req))) 245e9061c39SChristoph Hellwig return; 246e9061c39SChristoph Hellwig 24750a909dbSChaitanya Kulkarni if (!req->sg_cnt || !nr_bvec) { 24850a909dbSChaitanya Kulkarni nvmet_req_complete(req, 0); 24950a909dbSChaitanya Kulkarni return; 25050a909dbSChaitanya Kulkarni } 25150a909dbSChaitanya Kulkarni 25250a909dbSChaitanya Kulkarni if (nr_bvec > NVMET_MAX_INLINE_BIOVEC) 25350a909dbSChaitanya Kulkarni req->f.bvec = kmalloc_array(nr_bvec, sizeof(struct bio_vec), 25450a909dbSChaitanya Kulkarni GFP_KERNEL); 25550a909dbSChaitanya Kulkarni else 25650a909dbSChaitanya Kulkarni req->f.bvec = req->inline_bvec; 25750a909dbSChaitanya Kulkarni 25850a909dbSChaitanya Kulkarni if (unlikely(!req->f.bvec)) { 25950a909dbSChaitanya Kulkarni /* fallback under memory pressure */ 26050a909dbSChaitanya Kulkarni req->f.bvec = mempool_alloc(req->ns->bvec_pool, GFP_KERNEL); 26150a909dbSChaitanya Kulkarni req->f.mpool_alloc = true; 26250a909dbSChaitanya Kulkarni } else 26350a909dbSChaitanya Kulkarni req->f.mpool_alloc = false; 26450a909dbSChaitanya Kulkarni 26550a909dbSChaitanya Kulkarni if (req->ns->buffered_io) { 26650a909dbSChaitanya Kulkarni if (likely(!req->f.mpool_alloc) && 26750a909dbSChaitanya Kulkarni nvmet_file_execute_io(req, IOCB_NOWAIT)) 26850a909dbSChaitanya Kulkarni return; 26950a909dbSChaitanya Kulkarni nvmet_file_submit_buffered_io(req); 27050a909dbSChaitanya Kulkarni } else 27150a909dbSChaitanya Kulkarni nvmet_file_execute_io(req, 0); 27250a909dbSChaitanya Kulkarni } 27350a909dbSChaitanya Kulkarni 274dedf0be5SChaitanya Kulkarni u16 nvmet_file_flush(struct nvmet_req *req) 275dedf0be5SChaitanya Kulkarni { 276c6aa3542SChaitanya Kulkarni return errno_to_nvme_status(req, vfs_fsync(req->ns->file, 1)); 277dedf0be5SChaitanya Kulkarni } 278dedf0be5SChaitanya Kulkarni 279d5eff33eSChaitanya Kulkarni static void nvmet_file_flush_work(struct work_struct *w) 280d5eff33eSChaitanya Kulkarni { 281d5eff33eSChaitanya Kulkarni struct nvmet_req *req = container_of(w, struct nvmet_req, f.work); 282d5eff33eSChaitanya Kulkarni 283dedf0be5SChaitanya Kulkarni nvmet_req_complete(req, nvmet_file_flush(req)); 284d5eff33eSChaitanya Kulkarni } 285d5eff33eSChaitanya Kulkarni 286d5eff33eSChaitanya Kulkarni static void nvmet_file_execute_flush(struct nvmet_req *req) 287d5eff33eSChaitanya Kulkarni { 288136cc1ffSIsrael Rukshin if (!nvmet_check_transfer_len(req, 0)) 289e9061c39SChristoph Hellwig return; 290d5eff33eSChaitanya Kulkarni INIT_WORK(&req->f.work, nvmet_file_flush_work); 291d5eff33eSChaitanya Kulkarni schedule_work(&req->f.work); 292d5eff33eSChaitanya Kulkarni } 293d5eff33eSChaitanya Kulkarni 294d5eff33eSChaitanya Kulkarni static void nvmet_file_execute_discard(struct nvmet_req *req) 295d5eff33eSChaitanya Kulkarni { 296d5eff33eSChaitanya Kulkarni int mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE; 297d5eff33eSChaitanya Kulkarni struct nvme_dsm_range range; 2981b72b71fSSagi Grimberg loff_t offset, len; 299c6aa3542SChaitanya Kulkarni u16 status = 0; 300c6aa3542SChaitanya Kulkarni int ret; 3011b72b71fSSagi Grimberg int i; 302d5eff33eSChaitanya Kulkarni 303d5eff33eSChaitanya Kulkarni for (i = 0; i <= le32_to_cpu(req->cmd->dsm.nr); i++) { 304c6aa3542SChaitanya Kulkarni status = nvmet_copy_from_sgl(req, i * sizeof(range), &range, 3051b72b71fSSagi Grimberg sizeof(range)); 306c6aa3542SChaitanya Kulkarni if (status) 307d5eff33eSChaitanya Kulkarni break; 3089c891c13SSagi Grimberg 309d5eff33eSChaitanya Kulkarni offset = le64_to_cpu(range.slba) << req->ns->blksize_shift; 3108eacd1bdSBart Van Assche len = le32_to_cpu(range.nlb); 3118eacd1bdSBart Van Assche len <<= req->ns->blksize_shift; 3129c891c13SSagi Grimberg if (offset + len > req->ns->size) { 313c6aa3542SChaitanya Kulkarni req->error_slba = le64_to_cpu(range.slba); 314c6aa3542SChaitanya Kulkarni status = errno_to_nvme_status(req, -ENOSPC); 3159c891c13SSagi Grimberg break; 3169c891c13SSagi Grimberg } 3179c891c13SSagi Grimberg 318c6aa3542SChaitanya Kulkarni ret = vfs_fallocate(req->ns->file, mode, offset, len); 319005c674fSChristoph Hellwig if (ret && ret != -EOPNOTSUPP) { 320c6aa3542SChaitanya Kulkarni req->error_slba = le64_to_cpu(range.slba); 321c6aa3542SChaitanya Kulkarni status = errno_to_nvme_status(req, ret); 322d5eff33eSChaitanya Kulkarni break; 323d5eff33eSChaitanya Kulkarni } 3241b72b71fSSagi Grimberg } 325d5eff33eSChaitanya Kulkarni 326c6aa3542SChaitanya Kulkarni nvmet_req_complete(req, status); 327d5eff33eSChaitanya Kulkarni } 328d5eff33eSChaitanya Kulkarni 329d5eff33eSChaitanya Kulkarni static void nvmet_file_dsm_work(struct work_struct *w) 330d5eff33eSChaitanya Kulkarni { 331d5eff33eSChaitanya Kulkarni struct nvmet_req *req = container_of(w, struct nvmet_req, f.work); 332d5eff33eSChaitanya Kulkarni 333d5eff33eSChaitanya Kulkarni switch (le32_to_cpu(req->cmd->dsm.attributes)) { 334d5eff33eSChaitanya Kulkarni case NVME_DSMGMT_AD: 335d5eff33eSChaitanya Kulkarni nvmet_file_execute_discard(req); 336d5eff33eSChaitanya Kulkarni return; 337d5eff33eSChaitanya Kulkarni case NVME_DSMGMT_IDR: 338d5eff33eSChaitanya Kulkarni case NVME_DSMGMT_IDW: 339d5eff33eSChaitanya Kulkarni default: 340d5eff33eSChaitanya Kulkarni /* Not supported yet */ 341d5eff33eSChaitanya Kulkarni nvmet_req_complete(req, 0); 342d5eff33eSChaitanya Kulkarni return; 343d5eff33eSChaitanya Kulkarni } 344d5eff33eSChaitanya Kulkarni } 345d5eff33eSChaitanya Kulkarni 346d5eff33eSChaitanya Kulkarni static void nvmet_file_execute_dsm(struct nvmet_req *req) 347d5eff33eSChaitanya Kulkarni { 348b716e688SSagi Grimberg if (!nvmet_check_data_len_lte(req, nvmet_dsm_len(req))) 349e9061c39SChristoph Hellwig return; 350d5eff33eSChaitanya Kulkarni INIT_WORK(&req->f.work, nvmet_file_dsm_work); 351d5eff33eSChaitanya Kulkarni schedule_work(&req->f.work); 352d5eff33eSChaitanya Kulkarni } 353d5eff33eSChaitanya Kulkarni 354d5eff33eSChaitanya Kulkarni static void nvmet_file_write_zeroes_work(struct work_struct *w) 355d5eff33eSChaitanya Kulkarni { 356d5eff33eSChaitanya Kulkarni struct nvmet_req *req = container_of(w, struct nvmet_req, f.work); 357d5eff33eSChaitanya Kulkarni struct nvme_write_zeroes_cmd *write_zeroes = &req->cmd->write_zeroes; 358d5eff33eSChaitanya Kulkarni int mode = FALLOC_FL_ZERO_RANGE | FALLOC_FL_KEEP_SIZE; 359d5eff33eSChaitanya Kulkarni loff_t offset; 360d5eff33eSChaitanya Kulkarni loff_t len; 361d5eff33eSChaitanya Kulkarni int ret; 362d5eff33eSChaitanya Kulkarni 363d5eff33eSChaitanya Kulkarni offset = le64_to_cpu(write_zeroes->slba) << req->ns->blksize_shift; 364d5eff33eSChaitanya Kulkarni len = (((sector_t)le16_to_cpu(write_zeroes->length) + 1) << 365d5eff33eSChaitanya Kulkarni req->ns->blksize_shift); 366d5eff33eSChaitanya Kulkarni 3679c891c13SSagi Grimberg if (unlikely(offset + len > req->ns->size)) { 368c6aa3542SChaitanya Kulkarni nvmet_req_complete(req, errno_to_nvme_status(req, -ENOSPC)); 3699c891c13SSagi Grimberg return; 3709c891c13SSagi Grimberg } 3719c891c13SSagi Grimberg 372d5eff33eSChaitanya Kulkarni ret = vfs_fallocate(req->ns->file, mode, offset, len); 373c6aa3542SChaitanya Kulkarni nvmet_req_complete(req, ret < 0 ? errno_to_nvme_status(req, ret) : 0); 374d5eff33eSChaitanya Kulkarni } 375d5eff33eSChaitanya Kulkarni 376d5eff33eSChaitanya Kulkarni static void nvmet_file_execute_write_zeroes(struct nvmet_req *req) 377d5eff33eSChaitanya Kulkarni { 378136cc1ffSIsrael Rukshin if (!nvmet_check_transfer_len(req, 0)) 379e9061c39SChristoph Hellwig return; 380d5eff33eSChaitanya Kulkarni INIT_WORK(&req->f.work, nvmet_file_write_zeroes_work); 381d5eff33eSChaitanya Kulkarni schedule_work(&req->f.work); 382d5eff33eSChaitanya Kulkarni } 383d5eff33eSChaitanya Kulkarni 384d5eff33eSChaitanya Kulkarni u16 nvmet_file_parse_io_cmd(struct nvmet_req *req) 385d5eff33eSChaitanya Kulkarni { 386d5eff33eSChaitanya Kulkarni struct nvme_command *cmd = req->cmd; 387d5eff33eSChaitanya Kulkarni 388d5eff33eSChaitanya Kulkarni switch (cmd->common.opcode) { 389d5eff33eSChaitanya Kulkarni case nvme_cmd_read: 390d5eff33eSChaitanya Kulkarni case nvme_cmd_write: 391d5eff33eSChaitanya Kulkarni req->execute = nvmet_file_execute_rw; 392d5eff33eSChaitanya Kulkarni return 0; 393d5eff33eSChaitanya Kulkarni case nvme_cmd_flush: 394d5eff33eSChaitanya Kulkarni req->execute = nvmet_file_execute_flush; 395d5eff33eSChaitanya Kulkarni return 0; 396d5eff33eSChaitanya Kulkarni case nvme_cmd_dsm: 397d5eff33eSChaitanya Kulkarni req->execute = nvmet_file_execute_dsm; 398d5eff33eSChaitanya Kulkarni return 0; 399d5eff33eSChaitanya Kulkarni case nvme_cmd_write_zeroes: 400d5eff33eSChaitanya Kulkarni req->execute = nvmet_file_execute_write_zeroes; 401d5eff33eSChaitanya Kulkarni return 0; 402d5eff33eSChaitanya Kulkarni default: 403d5eff33eSChaitanya Kulkarni pr_err("unhandled cmd for file ns %d on qid %d\n", 404d5eff33eSChaitanya Kulkarni cmd->common.opcode, req->sq->qid); 405c6aa3542SChaitanya Kulkarni req->error_loc = offsetof(struct nvme_common_command, opcode); 406d5eff33eSChaitanya Kulkarni return NVME_SC_INVALID_OPCODE | NVME_SC_DNR; 407d5eff33eSChaitanya Kulkarni } 408d5eff33eSChaitanya Kulkarni } 409