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> 11c024b226SMaurizio Lombardi #include <linux/fs.h> 12d5eff33eSChaitanya Kulkarni #include "nvmet.h" 13d5eff33eSChaitanya Kulkarni 14d5eff33eSChaitanya Kulkarni #define NVMET_MAX_MPOOL_BVEC 16 15d5eff33eSChaitanya Kulkarni #define NVMET_MIN_MPOOL_OBJ 16 16d5eff33eSChaitanya Kulkarni 172caecd62SChaitanya Kulkarni void nvmet_file_ns_revalidate(struct nvmet_ns *ns) 18e8cd1ff1SAnthony Iliopoulos { 192caecd62SChaitanya Kulkarni ns->size = i_size_read(ns->file->f_mapping->host); 20e8cd1ff1SAnthony Iliopoulos } 21e8cd1ff1SAnthony Iliopoulos 22d5eff33eSChaitanya Kulkarni void nvmet_file_ns_disable(struct nvmet_ns *ns) 23d5eff33eSChaitanya Kulkarni { 24d5eff33eSChaitanya Kulkarni if (ns->file) { 2555eb942eSChaitanya Kulkarni if (ns->buffered_io) 2655eb942eSChaitanya Kulkarni flush_workqueue(buffered_io_wq); 27d5eff33eSChaitanya Kulkarni mempool_destroy(ns->bvec_pool); 28d5eff33eSChaitanya Kulkarni ns->bvec_pool = NULL; 29d5eff33eSChaitanya Kulkarni kmem_cache_destroy(ns->bvec_cache); 30d5eff33eSChaitanya Kulkarni ns->bvec_cache = NULL; 31d5eff33eSChaitanya Kulkarni fput(ns->file); 32d5eff33eSChaitanya Kulkarni ns->file = NULL; 33d5eff33eSChaitanya Kulkarni } 34d5eff33eSChaitanya Kulkarni } 35d5eff33eSChaitanya Kulkarni 36d5eff33eSChaitanya Kulkarni int nvmet_file_ns_enable(struct nvmet_ns *ns) 37d5eff33eSChaitanya Kulkarni { 3855eb942eSChaitanya Kulkarni int flags = O_RDWR | O_LARGEFILE; 392caecd62SChaitanya Kulkarni int ret = 0; 40d5eff33eSChaitanya Kulkarni 4155eb942eSChaitanya Kulkarni if (!ns->buffered_io) 4255eb942eSChaitanya Kulkarni flags |= O_DIRECT; 4355eb942eSChaitanya Kulkarni 4455eb942eSChaitanya Kulkarni ns->file = filp_open(ns->device_path, flags, 0); 45d5eff33eSChaitanya Kulkarni if (IS_ERR(ns->file)) { 4685428beaSDaniel Wagner ret = PTR_ERR(ns->file); 4785428beaSDaniel Wagner pr_err("failed to open file %s: (%d)\n", 4885428beaSDaniel Wagner ns->device_path, ret); 4985428beaSDaniel Wagner ns->file = NULL; 5085428beaSDaniel Wagner return ret; 51d5eff33eSChaitanya Kulkarni } 52d5eff33eSChaitanya Kulkarni 532caecd62SChaitanya Kulkarni nvmet_file_ns_revalidate(ns); 54d5eff33eSChaitanya Kulkarni 55525ec495SSagi Grimberg /* 56525ec495SSagi Grimberg * i_blkbits can be greater than the universally accepted upper bound, 57525ec495SSagi Grimberg * so make sure we export a sane namespace lba_shift. 58525ec495SSagi Grimberg */ 59525ec495SSagi Grimberg ns->blksize_shift = min_t(u8, 60525ec495SSagi Grimberg file_inode(ns->file)->i_blkbits, 12); 61d5eff33eSChaitanya Kulkarni 62d5eff33eSChaitanya Kulkarni ns->bvec_cache = kmem_cache_create("nvmet-bvec", 63d5eff33eSChaitanya Kulkarni NVMET_MAX_MPOOL_BVEC * sizeof(struct bio_vec), 64d5eff33eSChaitanya Kulkarni 0, SLAB_HWCACHE_ALIGN, NULL); 651367bc82SWei Yongjun if (!ns->bvec_cache) { 661367bc82SWei Yongjun ret = -ENOMEM; 67d5eff33eSChaitanya Kulkarni goto err; 681367bc82SWei Yongjun } 69d5eff33eSChaitanya Kulkarni 70d5eff33eSChaitanya Kulkarni ns->bvec_pool = mempool_create(NVMET_MIN_MPOOL_OBJ, mempool_alloc_slab, 71d5eff33eSChaitanya Kulkarni mempool_free_slab, ns->bvec_cache); 72d5eff33eSChaitanya Kulkarni 731367bc82SWei Yongjun if (!ns->bvec_pool) { 741367bc82SWei Yongjun ret = -ENOMEM; 75d5eff33eSChaitanya Kulkarni goto err; 761367bc82SWei Yongjun } 77d5eff33eSChaitanya Kulkarni 78d5eff33eSChaitanya Kulkarni return ret; 79d5eff33eSChaitanya Kulkarni err: 80d5eff33eSChaitanya Kulkarni ns->size = 0; 81d5eff33eSChaitanya Kulkarni ns->blksize_shift = 0; 82d5eff33eSChaitanya Kulkarni nvmet_file_ns_disable(ns); 83d5eff33eSChaitanya Kulkarni return ret; 84d5eff33eSChaitanya Kulkarni } 85d5eff33eSChaitanya Kulkarni 8602db9954SMing Lei static void nvmet_file_init_bvec(struct bio_vec *bv, struct scatterlist *sg) 87d5eff33eSChaitanya Kulkarni { 8802db9954SMing Lei bv->bv_page = sg_page(sg); 8902db9954SMing Lei bv->bv_offset = sg->offset; 9002db9954SMing Lei bv->bv_len = sg->length; 91d5eff33eSChaitanya Kulkarni } 92d5eff33eSChaitanya Kulkarni 93d5eff33eSChaitanya Kulkarni static ssize_t nvmet_file_submit_bvec(struct nvmet_req *req, loff_t pos, 9450a909dbSChaitanya Kulkarni unsigned long nr_segs, size_t count, int ki_flags) 95d5eff33eSChaitanya Kulkarni { 96d5eff33eSChaitanya Kulkarni struct kiocb *iocb = &req->f.iocb; 97d5eff33eSChaitanya Kulkarni ssize_t (*call_iter)(struct kiocb *iocb, struct iov_iter *iter); 98d5eff33eSChaitanya Kulkarni struct iov_iter iter; 9950a909dbSChaitanya Kulkarni int rw; 100d5eff33eSChaitanya Kulkarni 101d5eff33eSChaitanya Kulkarni if (req->cmd->rw.opcode == nvme_cmd_write) { 102d5eff33eSChaitanya Kulkarni if (req->cmd->rw.control & cpu_to_le16(NVME_RW_FUA)) 10350a909dbSChaitanya Kulkarni ki_flags |= IOCB_DSYNC; 104d5eff33eSChaitanya Kulkarni call_iter = req->ns->file->f_op->write_iter; 105*de4eda9dSAl Viro rw = ITER_SOURCE; 106d5eff33eSChaitanya Kulkarni } else { 107d5eff33eSChaitanya Kulkarni call_iter = req->ns->file->f_op->read_iter; 108*de4eda9dSAl Viro rw = ITER_DEST; 109d5eff33eSChaitanya Kulkarni } 110d5eff33eSChaitanya Kulkarni 111aa563d7bSDavid Howells iov_iter_bvec(&iter, rw, req->f.bvec, nr_segs, count); 112d5eff33eSChaitanya Kulkarni 113d5eff33eSChaitanya Kulkarni iocb->ki_pos = pos; 114d5eff33eSChaitanya Kulkarni iocb->ki_filp = req->ns->file; 115164f4064SAl Viro iocb->ki_flags = ki_flags | iocb->ki_filp->f_iocb_flags; 116d5eff33eSChaitanya Kulkarni 11750a909dbSChaitanya Kulkarni return call_iter(iocb, &iter); 118d5eff33eSChaitanya Kulkarni } 119d5eff33eSChaitanya Kulkarni 1206b19b766SJens Axboe static void nvmet_file_io_done(struct kiocb *iocb, long ret) 121d5eff33eSChaitanya Kulkarni { 122d5eff33eSChaitanya Kulkarni struct nvmet_req *req = container_of(iocb, struct nvmet_req, f.iocb); 123c6aa3542SChaitanya Kulkarni u16 status = NVME_SC_SUCCESS; 124d5eff33eSChaitanya Kulkarni 125d5eff33eSChaitanya Kulkarni if (req->f.bvec != req->inline_bvec) { 126d5eff33eSChaitanya Kulkarni if (likely(req->f.mpool_alloc == false)) 127d5eff33eSChaitanya Kulkarni kfree(req->f.bvec); 128d5eff33eSChaitanya Kulkarni else 129d5eff33eSChaitanya Kulkarni mempool_free(req->f.bvec, req->ns->bvec_pool); 130d5eff33eSChaitanya Kulkarni } 131d5eff33eSChaitanya Kulkarni 132e9061c39SChristoph Hellwig if (unlikely(ret != req->transfer_len)) 133c6aa3542SChaitanya Kulkarni status = errno_to_nvme_status(req, ret); 134c6aa3542SChaitanya Kulkarni nvmet_req_complete(req, status); 135d5eff33eSChaitanya Kulkarni } 136d5eff33eSChaitanya Kulkarni 13750a909dbSChaitanya Kulkarni static bool nvmet_file_execute_io(struct nvmet_req *req, int ki_flags) 138d5eff33eSChaitanya Kulkarni { 13902db9954SMing Lei ssize_t nr_bvec = req->sg_cnt; 140d5eff33eSChaitanya Kulkarni unsigned long bv_cnt = 0; 141d5eff33eSChaitanya Kulkarni bool is_sync = false; 142d5eff33eSChaitanya Kulkarni size_t len = 0, total_len = 0; 143d5eff33eSChaitanya Kulkarni ssize_t ret = 0; 144d5eff33eSChaitanya Kulkarni loff_t pos; 14502db9954SMing Lei int i; 14602db9954SMing Lei struct scatterlist *sg; 14750a909dbSChaitanya Kulkarni 14850a909dbSChaitanya Kulkarni if (req->f.mpool_alloc && nr_bvec > NVMET_MAX_MPOOL_BVEC) 14950a909dbSChaitanya Kulkarni is_sync = true; 150d5eff33eSChaitanya Kulkarni 1519c891c13SSagi Grimberg pos = le64_to_cpu(req->cmd->rw.slba) << req->ns->blksize_shift; 152e9061c39SChristoph Hellwig if (unlikely(pos + req->transfer_len > req->ns->size)) { 153c6aa3542SChaitanya Kulkarni nvmet_req_complete(req, errno_to_nvme_status(req, -ENOSPC)); 15450a909dbSChaitanya Kulkarni return true; 155d5eff33eSChaitanya Kulkarni } 156d5eff33eSChaitanya Kulkarni 157d5eff33eSChaitanya Kulkarni memset(&req->f.iocb, 0, sizeof(struct kiocb)); 15802db9954SMing Lei for_each_sg(req->sg, sg, req->sg_cnt, i) { 15902db9954SMing Lei nvmet_file_init_bvec(&req->f.bvec[bv_cnt], sg); 160d5eff33eSChaitanya Kulkarni len += req->f.bvec[bv_cnt].bv_len; 161d5eff33eSChaitanya Kulkarni total_len += req->f.bvec[bv_cnt].bv_len; 162d5eff33eSChaitanya Kulkarni bv_cnt++; 163d5eff33eSChaitanya Kulkarni 164d5eff33eSChaitanya Kulkarni WARN_ON_ONCE((nr_bvec - 1) < 0); 165d5eff33eSChaitanya Kulkarni 166d5eff33eSChaitanya Kulkarni if (unlikely(is_sync) && 167d5eff33eSChaitanya Kulkarni (nr_bvec - 1 == 0 || bv_cnt == NVMET_MAX_MPOOL_BVEC)) { 16850a909dbSChaitanya Kulkarni ret = nvmet_file_submit_bvec(req, pos, bv_cnt, len, 0); 169d5eff33eSChaitanya Kulkarni if (ret < 0) 17050a909dbSChaitanya Kulkarni goto complete; 17150a909dbSChaitanya Kulkarni 172d5eff33eSChaitanya Kulkarni pos += len; 173d5eff33eSChaitanya Kulkarni bv_cnt = 0; 174d5eff33eSChaitanya Kulkarni len = 0; 175d5eff33eSChaitanya Kulkarni } 176d5eff33eSChaitanya Kulkarni nr_bvec--; 177d5eff33eSChaitanya Kulkarni } 178d5eff33eSChaitanya Kulkarni 179e9061c39SChristoph Hellwig if (WARN_ON_ONCE(total_len != req->transfer_len)) { 180d5eff33eSChaitanya Kulkarni ret = -EIO; 18150a909dbSChaitanya Kulkarni goto complete; 182d5eff33eSChaitanya Kulkarni } 18350a909dbSChaitanya Kulkarni 18450a909dbSChaitanya Kulkarni if (unlikely(is_sync)) { 18550a909dbSChaitanya Kulkarni ret = total_len; 18650a909dbSChaitanya Kulkarni goto complete; 18750a909dbSChaitanya Kulkarni } 18850a909dbSChaitanya Kulkarni 18950a909dbSChaitanya Kulkarni /* 19050a909dbSChaitanya Kulkarni * A NULL ki_complete ask for synchronous execution, which we want 19150a909dbSChaitanya Kulkarni * for the IOCB_NOWAIT case. 19250a909dbSChaitanya Kulkarni */ 19350a909dbSChaitanya Kulkarni if (!(ki_flags & IOCB_NOWAIT)) 194d5eff33eSChaitanya Kulkarni req->f.iocb.ki_complete = nvmet_file_io_done; 19550a909dbSChaitanya Kulkarni 19650a909dbSChaitanya Kulkarni ret = nvmet_file_submit_bvec(req, pos, bv_cnt, total_len, ki_flags); 19750a909dbSChaitanya Kulkarni 19850a909dbSChaitanya Kulkarni switch (ret) { 19950a909dbSChaitanya Kulkarni case -EIOCBQUEUED: 20050a909dbSChaitanya Kulkarni return true; 20150a909dbSChaitanya Kulkarni case -EAGAIN: 20250a909dbSChaitanya Kulkarni if (WARN_ON_ONCE(!(ki_flags & IOCB_NOWAIT))) 20350a909dbSChaitanya Kulkarni goto complete; 20450a909dbSChaitanya Kulkarni return false; 20550a909dbSChaitanya Kulkarni case -EOPNOTSUPP: 20650a909dbSChaitanya Kulkarni /* 20750a909dbSChaitanya Kulkarni * For file systems returning error -EOPNOTSUPP, handle 20850a909dbSChaitanya Kulkarni * IOCB_NOWAIT error case separately and retry without 20950a909dbSChaitanya Kulkarni * IOCB_NOWAIT. 21050a909dbSChaitanya Kulkarni */ 21150a909dbSChaitanya Kulkarni if ((ki_flags & IOCB_NOWAIT)) 21250a909dbSChaitanya Kulkarni return false; 21350a909dbSChaitanya Kulkarni break; 21450a909dbSChaitanya Kulkarni } 21550a909dbSChaitanya Kulkarni 21650a909dbSChaitanya Kulkarni complete: 2176b19b766SJens Axboe nvmet_file_io_done(&req->f.iocb, ret); 21850a909dbSChaitanya Kulkarni return true; 219d5eff33eSChaitanya Kulkarni } 220d5eff33eSChaitanya Kulkarni 22155eb942eSChaitanya Kulkarni static void nvmet_file_buffered_io_work(struct work_struct *w) 22255eb942eSChaitanya Kulkarni { 22355eb942eSChaitanya Kulkarni struct nvmet_req *req = container_of(w, struct nvmet_req, f.work); 22455eb942eSChaitanya Kulkarni 22550a909dbSChaitanya Kulkarni nvmet_file_execute_io(req, 0); 22655eb942eSChaitanya Kulkarni } 22755eb942eSChaitanya Kulkarni 22850a909dbSChaitanya Kulkarni static void nvmet_file_submit_buffered_io(struct nvmet_req *req) 22955eb942eSChaitanya Kulkarni { 23055eb942eSChaitanya Kulkarni INIT_WORK(&req->f.work, nvmet_file_buffered_io_work); 23155eb942eSChaitanya Kulkarni queue_work(buffered_io_wq, &req->f.work); 23255eb942eSChaitanya Kulkarni } 23355eb942eSChaitanya Kulkarni 23450a909dbSChaitanya Kulkarni static void nvmet_file_execute_rw(struct nvmet_req *req) 23550a909dbSChaitanya Kulkarni { 23602db9954SMing Lei ssize_t nr_bvec = req->sg_cnt; 23750a909dbSChaitanya Kulkarni 238136cc1ffSIsrael Rukshin if (!nvmet_check_transfer_len(req, nvmet_rw_data_len(req))) 239e9061c39SChristoph Hellwig return; 240e9061c39SChristoph Hellwig 24150a909dbSChaitanya Kulkarni if (!req->sg_cnt || !nr_bvec) { 24250a909dbSChaitanya Kulkarni nvmet_req_complete(req, 0); 24350a909dbSChaitanya Kulkarni return; 24450a909dbSChaitanya Kulkarni } 24550a909dbSChaitanya Kulkarni 24650a909dbSChaitanya Kulkarni if (nr_bvec > NVMET_MAX_INLINE_BIOVEC) 24750a909dbSChaitanya Kulkarni req->f.bvec = kmalloc_array(nr_bvec, sizeof(struct bio_vec), 24850a909dbSChaitanya Kulkarni GFP_KERNEL); 24950a909dbSChaitanya Kulkarni else 25050a909dbSChaitanya Kulkarni req->f.bvec = req->inline_bvec; 25150a909dbSChaitanya Kulkarni 25250a909dbSChaitanya Kulkarni if (unlikely(!req->f.bvec)) { 25350a909dbSChaitanya Kulkarni /* fallback under memory pressure */ 25450a909dbSChaitanya Kulkarni req->f.bvec = mempool_alloc(req->ns->bvec_pool, GFP_KERNEL); 25550a909dbSChaitanya Kulkarni req->f.mpool_alloc = true; 25650a909dbSChaitanya Kulkarni } else 25750a909dbSChaitanya Kulkarni req->f.mpool_alloc = false; 25850a909dbSChaitanya Kulkarni 25950a909dbSChaitanya Kulkarni if (req->ns->buffered_io) { 26050a909dbSChaitanya Kulkarni if (likely(!req->f.mpool_alloc) && 261c024b226SMaurizio Lombardi (req->ns->file->f_mode & FMODE_NOWAIT) && 26250a909dbSChaitanya Kulkarni nvmet_file_execute_io(req, IOCB_NOWAIT)) 26350a909dbSChaitanya Kulkarni return; 26450a909dbSChaitanya Kulkarni nvmet_file_submit_buffered_io(req); 26550a909dbSChaitanya Kulkarni } else 26650a909dbSChaitanya Kulkarni nvmet_file_execute_io(req, 0); 26750a909dbSChaitanya Kulkarni } 26850a909dbSChaitanya Kulkarni 269dedf0be5SChaitanya Kulkarni u16 nvmet_file_flush(struct nvmet_req *req) 270dedf0be5SChaitanya Kulkarni { 271c6aa3542SChaitanya Kulkarni return errno_to_nvme_status(req, vfs_fsync(req->ns->file, 1)); 272dedf0be5SChaitanya Kulkarni } 273dedf0be5SChaitanya Kulkarni 274d5eff33eSChaitanya Kulkarni static void nvmet_file_flush_work(struct work_struct *w) 275d5eff33eSChaitanya Kulkarni { 276d5eff33eSChaitanya Kulkarni struct nvmet_req *req = container_of(w, struct nvmet_req, f.work); 277d5eff33eSChaitanya Kulkarni 278dedf0be5SChaitanya Kulkarni nvmet_req_complete(req, nvmet_file_flush(req)); 279d5eff33eSChaitanya Kulkarni } 280d5eff33eSChaitanya Kulkarni 281d5eff33eSChaitanya Kulkarni static void nvmet_file_execute_flush(struct nvmet_req *req) 282d5eff33eSChaitanya Kulkarni { 283136cc1ffSIsrael Rukshin if (!nvmet_check_transfer_len(req, 0)) 284e9061c39SChristoph Hellwig return; 285d5eff33eSChaitanya Kulkarni INIT_WORK(&req->f.work, nvmet_file_flush_work); 2868832cf92SSagi Grimberg queue_work(nvmet_wq, &req->f.work); 287d5eff33eSChaitanya Kulkarni } 288d5eff33eSChaitanya Kulkarni 289d5eff33eSChaitanya Kulkarni static void nvmet_file_execute_discard(struct nvmet_req *req) 290d5eff33eSChaitanya Kulkarni { 291d5eff33eSChaitanya Kulkarni int mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE; 292d5eff33eSChaitanya Kulkarni struct nvme_dsm_range range; 2931b72b71fSSagi Grimberg loff_t offset, len; 294c6aa3542SChaitanya Kulkarni u16 status = 0; 295c6aa3542SChaitanya Kulkarni int ret; 2961b72b71fSSagi Grimberg int i; 297d5eff33eSChaitanya Kulkarni 298d5eff33eSChaitanya Kulkarni for (i = 0; i <= le32_to_cpu(req->cmd->dsm.nr); i++) { 299c6aa3542SChaitanya Kulkarni status = nvmet_copy_from_sgl(req, i * sizeof(range), &range, 3001b72b71fSSagi Grimberg sizeof(range)); 301c6aa3542SChaitanya Kulkarni if (status) 302d5eff33eSChaitanya Kulkarni break; 3039c891c13SSagi Grimberg 304d5eff33eSChaitanya Kulkarni offset = le64_to_cpu(range.slba) << req->ns->blksize_shift; 3058eacd1bdSBart Van Assche len = le32_to_cpu(range.nlb); 3068eacd1bdSBart Van Assche len <<= req->ns->blksize_shift; 3079c891c13SSagi Grimberg if (offset + len > req->ns->size) { 308c6aa3542SChaitanya Kulkarni req->error_slba = le64_to_cpu(range.slba); 309c6aa3542SChaitanya Kulkarni status = errno_to_nvme_status(req, -ENOSPC); 3109c891c13SSagi Grimberg break; 3119c891c13SSagi Grimberg } 3129c891c13SSagi Grimberg 313c6aa3542SChaitanya Kulkarni ret = vfs_fallocate(req->ns->file, mode, offset, len); 314005c674fSChristoph Hellwig if (ret && ret != -EOPNOTSUPP) { 315c6aa3542SChaitanya Kulkarni req->error_slba = le64_to_cpu(range.slba); 316c6aa3542SChaitanya Kulkarni status = errno_to_nvme_status(req, ret); 317d5eff33eSChaitanya Kulkarni break; 318d5eff33eSChaitanya Kulkarni } 3191b72b71fSSagi Grimberg } 320d5eff33eSChaitanya Kulkarni 321c6aa3542SChaitanya Kulkarni nvmet_req_complete(req, status); 322d5eff33eSChaitanya Kulkarni } 323d5eff33eSChaitanya Kulkarni 324d5eff33eSChaitanya Kulkarni static void nvmet_file_dsm_work(struct work_struct *w) 325d5eff33eSChaitanya Kulkarni { 326d5eff33eSChaitanya Kulkarni struct nvmet_req *req = container_of(w, struct nvmet_req, f.work); 327d5eff33eSChaitanya Kulkarni 328d5eff33eSChaitanya Kulkarni switch (le32_to_cpu(req->cmd->dsm.attributes)) { 329d5eff33eSChaitanya Kulkarni case NVME_DSMGMT_AD: 330d5eff33eSChaitanya Kulkarni nvmet_file_execute_discard(req); 331d5eff33eSChaitanya Kulkarni return; 332d5eff33eSChaitanya Kulkarni case NVME_DSMGMT_IDR: 333d5eff33eSChaitanya Kulkarni case NVME_DSMGMT_IDW: 334d5eff33eSChaitanya Kulkarni default: 335d5eff33eSChaitanya Kulkarni /* Not supported yet */ 336d5eff33eSChaitanya Kulkarni nvmet_req_complete(req, 0); 337d5eff33eSChaitanya Kulkarni return; 338d5eff33eSChaitanya Kulkarni } 339d5eff33eSChaitanya Kulkarni } 340d5eff33eSChaitanya Kulkarni 341d5eff33eSChaitanya Kulkarni static void nvmet_file_execute_dsm(struct nvmet_req *req) 342d5eff33eSChaitanya Kulkarni { 343b716e688SSagi Grimberg if (!nvmet_check_data_len_lte(req, nvmet_dsm_len(req))) 344e9061c39SChristoph Hellwig return; 345d5eff33eSChaitanya Kulkarni INIT_WORK(&req->f.work, nvmet_file_dsm_work); 3468832cf92SSagi Grimberg queue_work(nvmet_wq, &req->f.work); 347d5eff33eSChaitanya Kulkarni } 348d5eff33eSChaitanya Kulkarni 349d5eff33eSChaitanya Kulkarni static void nvmet_file_write_zeroes_work(struct work_struct *w) 350d5eff33eSChaitanya Kulkarni { 351d5eff33eSChaitanya Kulkarni struct nvmet_req *req = container_of(w, struct nvmet_req, f.work); 352d5eff33eSChaitanya Kulkarni struct nvme_write_zeroes_cmd *write_zeroes = &req->cmd->write_zeroes; 353d5eff33eSChaitanya Kulkarni int mode = FALLOC_FL_ZERO_RANGE | FALLOC_FL_KEEP_SIZE; 354d5eff33eSChaitanya Kulkarni loff_t offset; 355d5eff33eSChaitanya Kulkarni loff_t len; 356d5eff33eSChaitanya Kulkarni int ret; 357d5eff33eSChaitanya Kulkarni 358d5eff33eSChaitanya Kulkarni offset = le64_to_cpu(write_zeroes->slba) << req->ns->blksize_shift; 359d5eff33eSChaitanya Kulkarni len = (((sector_t)le16_to_cpu(write_zeroes->length) + 1) << 360d5eff33eSChaitanya Kulkarni req->ns->blksize_shift); 361d5eff33eSChaitanya Kulkarni 3629c891c13SSagi Grimberg if (unlikely(offset + len > req->ns->size)) { 363c6aa3542SChaitanya Kulkarni nvmet_req_complete(req, errno_to_nvme_status(req, -ENOSPC)); 3649c891c13SSagi Grimberg return; 3659c891c13SSagi Grimberg } 3669c891c13SSagi Grimberg 367d5eff33eSChaitanya Kulkarni ret = vfs_fallocate(req->ns->file, mode, offset, len); 368c6aa3542SChaitanya Kulkarni nvmet_req_complete(req, ret < 0 ? errno_to_nvme_status(req, ret) : 0); 369d5eff33eSChaitanya Kulkarni } 370d5eff33eSChaitanya Kulkarni 371d5eff33eSChaitanya Kulkarni static void nvmet_file_execute_write_zeroes(struct nvmet_req *req) 372d5eff33eSChaitanya Kulkarni { 373136cc1ffSIsrael Rukshin if (!nvmet_check_transfer_len(req, 0)) 374e9061c39SChristoph Hellwig return; 375d5eff33eSChaitanya Kulkarni INIT_WORK(&req->f.work, nvmet_file_write_zeroes_work); 3768832cf92SSagi Grimberg queue_work(nvmet_wq, &req->f.work); 377d5eff33eSChaitanya Kulkarni } 378d5eff33eSChaitanya Kulkarni 379d5eff33eSChaitanya Kulkarni u16 nvmet_file_parse_io_cmd(struct nvmet_req *req) 380d5eff33eSChaitanya Kulkarni { 381f3dce2adSChaitanya Kulkarni switch (req->cmd->common.opcode) { 382d5eff33eSChaitanya Kulkarni case nvme_cmd_read: 383d5eff33eSChaitanya Kulkarni case nvme_cmd_write: 384d5eff33eSChaitanya Kulkarni req->execute = nvmet_file_execute_rw; 385d5eff33eSChaitanya Kulkarni return 0; 386d5eff33eSChaitanya Kulkarni case nvme_cmd_flush: 387d5eff33eSChaitanya Kulkarni req->execute = nvmet_file_execute_flush; 388d5eff33eSChaitanya Kulkarni return 0; 389d5eff33eSChaitanya Kulkarni case nvme_cmd_dsm: 390d5eff33eSChaitanya Kulkarni req->execute = nvmet_file_execute_dsm; 391d5eff33eSChaitanya Kulkarni return 0; 392d5eff33eSChaitanya Kulkarni case nvme_cmd_write_zeroes: 393d5eff33eSChaitanya Kulkarni req->execute = nvmet_file_execute_write_zeroes; 394d5eff33eSChaitanya Kulkarni return 0; 395d5eff33eSChaitanya Kulkarni default: 3961c2c7613SChaitanya Kulkarni return nvmet_report_invalid_opcode(req); 397d5eff33eSChaitanya Kulkarni } 398d5eff33eSChaitanya Kulkarni } 399