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_MIN_MPOOL_OBJ 16 15d5eff33eSChaitanya Kulkarni 162caecd62SChaitanya Kulkarni void nvmet_file_ns_revalidate(struct nvmet_ns *ns) 17e8cd1ff1SAnthony Iliopoulos { 182caecd62SChaitanya Kulkarni ns->size = i_size_read(ns->file->f_mapping->host); 19e8cd1ff1SAnthony Iliopoulos } 20e8cd1ff1SAnthony Iliopoulos 21d5eff33eSChaitanya Kulkarni void nvmet_file_ns_disable(struct nvmet_ns *ns) 22d5eff33eSChaitanya Kulkarni { 23d5eff33eSChaitanya Kulkarni if (ns->file) { 2455eb942eSChaitanya Kulkarni if (ns->buffered_io) 2555eb942eSChaitanya Kulkarni flush_workqueue(buffered_io_wq); 26d5eff33eSChaitanya Kulkarni mempool_destroy(ns->bvec_pool); 27d5eff33eSChaitanya Kulkarni ns->bvec_pool = NULL; 28d5eff33eSChaitanya Kulkarni fput(ns->file); 29d5eff33eSChaitanya Kulkarni ns->file = NULL; 30d5eff33eSChaitanya Kulkarni } 31d5eff33eSChaitanya Kulkarni } 32d5eff33eSChaitanya Kulkarni 33d5eff33eSChaitanya Kulkarni int nvmet_file_ns_enable(struct nvmet_ns *ns) 34d5eff33eSChaitanya Kulkarni { 3555eb942eSChaitanya Kulkarni int flags = O_RDWR | O_LARGEFILE; 362caecd62SChaitanya Kulkarni int ret = 0; 37d5eff33eSChaitanya Kulkarni 3855eb942eSChaitanya Kulkarni if (!ns->buffered_io) 3955eb942eSChaitanya Kulkarni flags |= O_DIRECT; 4055eb942eSChaitanya Kulkarni 4155eb942eSChaitanya Kulkarni ns->file = filp_open(ns->device_path, flags, 0); 42d5eff33eSChaitanya Kulkarni if (IS_ERR(ns->file)) { 4385428beaSDaniel Wagner ret = PTR_ERR(ns->file); 4485428beaSDaniel Wagner pr_err("failed to open file %s: (%d)\n", 4585428beaSDaniel Wagner ns->device_path, ret); 4685428beaSDaniel Wagner ns->file = NULL; 4785428beaSDaniel Wagner return ret; 48d5eff33eSChaitanya Kulkarni } 49d5eff33eSChaitanya Kulkarni 502caecd62SChaitanya Kulkarni nvmet_file_ns_revalidate(ns); 51d5eff33eSChaitanya Kulkarni 52525ec495SSagi Grimberg /* 53525ec495SSagi Grimberg * i_blkbits can be greater than the universally accepted upper bound, 54525ec495SSagi Grimberg * so make sure we export a sane namespace lba_shift. 55525ec495SSagi Grimberg */ 56525ec495SSagi Grimberg ns->blksize_shift = min_t(u8, 57525ec495SSagi Grimberg file_inode(ns->file)->i_blkbits, 12); 58d5eff33eSChaitanya Kulkarni 59d5eff33eSChaitanya Kulkarni ns->bvec_pool = mempool_create(NVMET_MIN_MPOOL_OBJ, mempool_alloc_slab, 60*fa8f9ac4SChristoph Hellwig mempool_free_slab, nvmet_bvec_cache); 61d5eff33eSChaitanya Kulkarni 621367bc82SWei Yongjun if (!ns->bvec_pool) { 631367bc82SWei Yongjun ret = -ENOMEM; 64d5eff33eSChaitanya Kulkarni goto err; 651367bc82SWei Yongjun } 66d5eff33eSChaitanya Kulkarni 67d5eff33eSChaitanya Kulkarni return ret; 68d5eff33eSChaitanya Kulkarni err: 69*fa8f9ac4SChristoph Hellwig fput(ns->file); 70*fa8f9ac4SChristoph Hellwig ns->file = NULL; 71d5eff33eSChaitanya Kulkarni ns->size = 0; 72d5eff33eSChaitanya Kulkarni ns->blksize_shift = 0; 73d5eff33eSChaitanya Kulkarni return ret; 74d5eff33eSChaitanya Kulkarni } 75d5eff33eSChaitanya Kulkarni 7602db9954SMing Lei static void nvmet_file_init_bvec(struct bio_vec *bv, struct scatterlist *sg) 77d5eff33eSChaitanya Kulkarni { 7802db9954SMing Lei bv->bv_page = sg_page(sg); 7902db9954SMing Lei bv->bv_offset = sg->offset; 8002db9954SMing Lei bv->bv_len = sg->length; 81d5eff33eSChaitanya Kulkarni } 82d5eff33eSChaitanya Kulkarni 83d5eff33eSChaitanya Kulkarni static ssize_t nvmet_file_submit_bvec(struct nvmet_req *req, loff_t pos, 8450a909dbSChaitanya Kulkarni unsigned long nr_segs, size_t count, int ki_flags) 85d5eff33eSChaitanya Kulkarni { 86d5eff33eSChaitanya Kulkarni struct kiocb *iocb = &req->f.iocb; 87d5eff33eSChaitanya Kulkarni ssize_t (*call_iter)(struct kiocb *iocb, struct iov_iter *iter); 88d5eff33eSChaitanya Kulkarni struct iov_iter iter; 8950a909dbSChaitanya Kulkarni int rw; 90d5eff33eSChaitanya Kulkarni 91d5eff33eSChaitanya Kulkarni if (req->cmd->rw.opcode == nvme_cmd_write) { 92d5eff33eSChaitanya Kulkarni if (req->cmd->rw.control & cpu_to_le16(NVME_RW_FUA)) 9350a909dbSChaitanya Kulkarni ki_flags |= IOCB_DSYNC; 94d5eff33eSChaitanya Kulkarni call_iter = req->ns->file->f_op->write_iter; 95d5eff33eSChaitanya Kulkarni rw = WRITE; 96d5eff33eSChaitanya Kulkarni } else { 97d5eff33eSChaitanya Kulkarni call_iter = req->ns->file->f_op->read_iter; 98d5eff33eSChaitanya Kulkarni rw = READ; 99d5eff33eSChaitanya Kulkarni } 100d5eff33eSChaitanya Kulkarni 101aa563d7bSDavid Howells iov_iter_bvec(&iter, rw, req->f.bvec, nr_segs, count); 102d5eff33eSChaitanya Kulkarni 103d5eff33eSChaitanya Kulkarni iocb->ki_pos = pos; 104d5eff33eSChaitanya Kulkarni iocb->ki_filp = req->ns->file; 105164f4064SAl Viro iocb->ki_flags = ki_flags | iocb->ki_filp->f_iocb_flags; 106d5eff33eSChaitanya Kulkarni 10750a909dbSChaitanya Kulkarni return call_iter(iocb, &iter); 108d5eff33eSChaitanya Kulkarni } 109d5eff33eSChaitanya Kulkarni 1106b19b766SJens Axboe static void nvmet_file_io_done(struct kiocb *iocb, long ret) 111d5eff33eSChaitanya Kulkarni { 112d5eff33eSChaitanya Kulkarni struct nvmet_req *req = container_of(iocb, struct nvmet_req, f.iocb); 113c6aa3542SChaitanya Kulkarni u16 status = NVME_SC_SUCCESS; 114d5eff33eSChaitanya Kulkarni 115d5eff33eSChaitanya Kulkarni if (req->f.bvec != req->inline_bvec) { 116d5eff33eSChaitanya Kulkarni if (likely(req->f.mpool_alloc == false)) 117d5eff33eSChaitanya Kulkarni kfree(req->f.bvec); 118d5eff33eSChaitanya Kulkarni else 119d5eff33eSChaitanya Kulkarni mempool_free(req->f.bvec, req->ns->bvec_pool); 120d5eff33eSChaitanya Kulkarni } 121d5eff33eSChaitanya Kulkarni 122e9061c39SChristoph Hellwig if (unlikely(ret != req->transfer_len)) 123c6aa3542SChaitanya Kulkarni status = errno_to_nvme_status(req, ret); 124c6aa3542SChaitanya Kulkarni nvmet_req_complete(req, status); 125d5eff33eSChaitanya Kulkarni } 126d5eff33eSChaitanya Kulkarni 12750a909dbSChaitanya Kulkarni static bool nvmet_file_execute_io(struct nvmet_req *req, int ki_flags) 128d5eff33eSChaitanya Kulkarni { 12902db9954SMing Lei ssize_t nr_bvec = req->sg_cnt; 130d5eff33eSChaitanya Kulkarni unsigned long bv_cnt = 0; 131d5eff33eSChaitanya Kulkarni bool is_sync = false; 132d5eff33eSChaitanya Kulkarni size_t len = 0, total_len = 0; 133d5eff33eSChaitanya Kulkarni ssize_t ret = 0; 134d5eff33eSChaitanya Kulkarni loff_t pos; 13502db9954SMing Lei int i; 13602db9954SMing Lei struct scatterlist *sg; 13750a909dbSChaitanya Kulkarni 13850a909dbSChaitanya Kulkarni if (req->f.mpool_alloc && nr_bvec > NVMET_MAX_MPOOL_BVEC) 13950a909dbSChaitanya Kulkarni is_sync = true; 140d5eff33eSChaitanya Kulkarni 1419c891c13SSagi Grimberg pos = le64_to_cpu(req->cmd->rw.slba) << req->ns->blksize_shift; 142e9061c39SChristoph Hellwig if (unlikely(pos + req->transfer_len > req->ns->size)) { 143c6aa3542SChaitanya Kulkarni nvmet_req_complete(req, errno_to_nvme_status(req, -ENOSPC)); 14450a909dbSChaitanya Kulkarni return true; 145d5eff33eSChaitanya Kulkarni } 146d5eff33eSChaitanya Kulkarni 147d5eff33eSChaitanya Kulkarni memset(&req->f.iocb, 0, sizeof(struct kiocb)); 14802db9954SMing Lei for_each_sg(req->sg, sg, req->sg_cnt, i) { 14902db9954SMing Lei nvmet_file_init_bvec(&req->f.bvec[bv_cnt], sg); 150d5eff33eSChaitanya Kulkarni len += req->f.bvec[bv_cnt].bv_len; 151d5eff33eSChaitanya Kulkarni total_len += req->f.bvec[bv_cnt].bv_len; 152d5eff33eSChaitanya Kulkarni bv_cnt++; 153d5eff33eSChaitanya Kulkarni 154d5eff33eSChaitanya Kulkarni WARN_ON_ONCE((nr_bvec - 1) < 0); 155d5eff33eSChaitanya Kulkarni 156d5eff33eSChaitanya Kulkarni if (unlikely(is_sync) && 157d5eff33eSChaitanya Kulkarni (nr_bvec - 1 == 0 || bv_cnt == NVMET_MAX_MPOOL_BVEC)) { 15850a909dbSChaitanya Kulkarni ret = nvmet_file_submit_bvec(req, pos, bv_cnt, len, 0); 159d5eff33eSChaitanya Kulkarni if (ret < 0) 16050a909dbSChaitanya Kulkarni goto complete; 16150a909dbSChaitanya Kulkarni 162d5eff33eSChaitanya Kulkarni pos += len; 163d5eff33eSChaitanya Kulkarni bv_cnt = 0; 164d5eff33eSChaitanya Kulkarni len = 0; 165d5eff33eSChaitanya Kulkarni } 166d5eff33eSChaitanya Kulkarni nr_bvec--; 167d5eff33eSChaitanya Kulkarni } 168d5eff33eSChaitanya Kulkarni 169e9061c39SChristoph Hellwig if (WARN_ON_ONCE(total_len != req->transfer_len)) { 170d5eff33eSChaitanya Kulkarni ret = -EIO; 17150a909dbSChaitanya Kulkarni goto complete; 172d5eff33eSChaitanya Kulkarni } 17350a909dbSChaitanya Kulkarni 17450a909dbSChaitanya Kulkarni if (unlikely(is_sync)) { 17550a909dbSChaitanya Kulkarni ret = total_len; 17650a909dbSChaitanya Kulkarni goto complete; 17750a909dbSChaitanya Kulkarni } 17850a909dbSChaitanya Kulkarni 17950a909dbSChaitanya Kulkarni /* 18050a909dbSChaitanya Kulkarni * A NULL ki_complete ask for synchronous execution, which we want 18150a909dbSChaitanya Kulkarni * for the IOCB_NOWAIT case. 18250a909dbSChaitanya Kulkarni */ 18350a909dbSChaitanya Kulkarni if (!(ki_flags & IOCB_NOWAIT)) 184d5eff33eSChaitanya Kulkarni req->f.iocb.ki_complete = nvmet_file_io_done; 18550a909dbSChaitanya Kulkarni 18650a909dbSChaitanya Kulkarni ret = nvmet_file_submit_bvec(req, pos, bv_cnt, total_len, ki_flags); 18750a909dbSChaitanya Kulkarni 18850a909dbSChaitanya Kulkarni switch (ret) { 18950a909dbSChaitanya Kulkarni case -EIOCBQUEUED: 19050a909dbSChaitanya Kulkarni return true; 19150a909dbSChaitanya Kulkarni case -EAGAIN: 19250a909dbSChaitanya Kulkarni if (WARN_ON_ONCE(!(ki_flags & IOCB_NOWAIT))) 19350a909dbSChaitanya Kulkarni goto complete; 19450a909dbSChaitanya Kulkarni return false; 19550a909dbSChaitanya Kulkarni case -EOPNOTSUPP: 19650a909dbSChaitanya Kulkarni /* 19750a909dbSChaitanya Kulkarni * For file systems returning error -EOPNOTSUPP, handle 19850a909dbSChaitanya Kulkarni * IOCB_NOWAIT error case separately and retry without 19950a909dbSChaitanya Kulkarni * IOCB_NOWAIT. 20050a909dbSChaitanya Kulkarni */ 20150a909dbSChaitanya Kulkarni if ((ki_flags & IOCB_NOWAIT)) 20250a909dbSChaitanya Kulkarni return false; 20350a909dbSChaitanya Kulkarni break; 20450a909dbSChaitanya Kulkarni } 20550a909dbSChaitanya Kulkarni 20650a909dbSChaitanya Kulkarni complete: 2076b19b766SJens Axboe nvmet_file_io_done(&req->f.iocb, ret); 20850a909dbSChaitanya Kulkarni return true; 209d5eff33eSChaitanya Kulkarni } 210d5eff33eSChaitanya Kulkarni 21155eb942eSChaitanya Kulkarni static void nvmet_file_buffered_io_work(struct work_struct *w) 21255eb942eSChaitanya Kulkarni { 21355eb942eSChaitanya Kulkarni struct nvmet_req *req = container_of(w, struct nvmet_req, f.work); 21455eb942eSChaitanya Kulkarni 21550a909dbSChaitanya Kulkarni nvmet_file_execute_io(req, 0); 21655eb942eSChaitanya Kulkarni } 21755eb942eSChaitanya Kulkarni 21850a909dbSChaitanya Kulkarni static void nvmet_file_submit_buffered_io(struct nvmet_req *req) 21955eb942eSChaitanya Kulkarni { 22055eb942eSChaitanya Kulkarni INIT_WORK(&req->f.work, nvmet_file_buffered_io_work); 22155eb942eSChaitanya Kulkarni queue_work(buffered_io_wq, &req->f.work); 22255eb942eSChaitanya Kulkarni } 22355eb942eSChaitanya Kulkarni 22450a909dbSChaitanya Kulkarni static void nvmet_file_execute_rw(struct nvmet_req *req) 22550a909dbSChaitanya Kulkarni { 22602db9954SMing Lei ssize_t nr_bvec = req->sg_cnt; 22750a909dbSChaitanya Kulkarni 228136cc1ffSIsrael Rukshin if (!nvmet_check_transfer_len(req, nvmet_rw_data_len(req))) 229e9061c39SChristoph Hellwig return; 230e9061c39SChristoph Hellwig 23150a909dbSChaitanya Kulkarni if (!req->sg_cnt || !nr_bvec) { 23250a909dbSChaitanya Kulkarni nvmet_req_complete(req, 0); 23350a909dbSChaitanya Kulkarni return; 23450a909dbSChaitanya Kulkarni } 23550a909dbSChaitanya Kulkarni 23650a909dbSChaitanya Kulkarni if (nr_bvec > NVMET_MAX_INLINE_BIOVEC) 23750a909dbSChaitanya Kulkarni req->f.bvec = kmalloc_array(nr_bvec, sizeof(struct bio_vec), 23850a909dbSChaitanya Kulkarni GFP_KERNEL); 23950a909dbSChaitanya Kulkarni else 24050a909dbSChaitanya Kulkarni req->f.bvec = req->inline_bvec; 24150a909dbSChaitanya Kulkarni 24250a909dbSChaitanya Kulkarni if (unlikely(!req->f.bvec)) { 24350a909dbSChaitanya Kulkarni /* fallback under memory pressure */ 24450a909dbSChaitanya Kulkarni req->f.bvec = mempool_alloc(req->ns->bvec_pool, GFP_KERNEL); 24550a909dbSChaitanya Kulkarni req->f.mpool_alloc = true; 24650a909dbSChaitanya Kulkarni } else 24750a909dbSChaitanya Kulkarni req->f.mpool_alloc = false; 24850a909dbSChaitanya Kulkarni 24950a909dbSChaitanya Kulkarni if (req->ns->buffered_io) { 25050a909dbSChaitanya Kulkarni if (likely(!req->f.mpool_alloc) && 251c024b226SMaurizio Lombardi (req->ns->file->f_mode & FMODE_NOWAIT) && 25250a909dbSChaitanya Kulkarni nvmet_file_execute_io(req, IOCB_NOWAIT)) 25350a909dbSChaitanya Kulkarni return; 25450a909dbSChaitanya Kulkarni nvmet_file_submit_buffered_io(req); 25550a909dbSChaitanya Kulkarni } else 25650a909dbSChaitanya Kulkarni nvmet_file_execute_io(req, 0); 25750a909dbSChaitanya Kulkarni } 25850a909dbSChaitanya Kulkarni 259dedf0be5SChaitanya Kulkarni u16 nvmet_file_flush(struct nvmet_req *req) 260dedf0be5SChaitanya Kulkarni { 261c6aa3542SChaitanya Kulkarni return errno_to_nvme_status(req, vfs_fsync(req->ns->file, 1)); 262dedf0be5SChaitanya Kulkarni } 263dedf0be5SChaitanya Kulkarni 264d5eff33eSChaitanya Kulkarni static void nvmet_file_flush_work(struct work_struct *w) 265d5eff33eSChaitanya Kulkarni { 266d5eff33eSChaitanya Kulkarni struct nvmet_req *req = container_of(w, struct nvmet_req, f.work); 267d5eff33eSChaitanya Kulkarni 268dedf0be5SChaitanya Kulkarni nvmet_req_complete(req, nvmet_file_flush(req)); 269d5eff33eSChaitanya Kulkarni } 270d5eff33eSChaitanya Kulkarni 271d5eff33eSChaitanya Kulkarni static void nvmet_file_execute_flush(struct nvmet_req *req) 272d5eff33eSChaitanya Kulkarni { 273136cc1ffSIsrael Rukshin if (!nvmet_check_transfer_len(req, 0)) 274e9061c39SChristoph Hellwig return; 275d5eff33eSChaitanya Kulkarni INIT_WORK(&req->f.work, nvmet_file_flush_work); 2768832cf92SSagi Grimberg queue_work(nvmet_wq, &req->f.work); 277d5eff33eSChaitanya Kulkarni } 278d5eff33eSChaitanya Kulkarni 279d5eff33eSChaitanya Kulkarni static void nvmet_file_execute_discard(struct nvmet_req *req) 280d5eff33eSChaitanya Kulkarni { 281d5eff33eSChaitanya Kulkarni int mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE; 282d5eff33eSChaitanya Kulkarni struct nvme_dsm_range range; 2831b72b71fSSagi Grimberg loff_t offset, len; 284c6aa3542SChaitanya Kulkarni u16 status = 0; 285c6aa3542SChaitanya Kulkarni int ret; 2861b72b71fSSagi Grimberg int i; 287d5eff33eSChaitanya Kulkarni 288d5eff33eSChaitanya Kulkarni for (i = 0; i <= le32_to_cpu(req->cmd->dsm.nr); i++) { 289c6aa3542SChaitanya Kulkarni status = nvmet_copy_from_sgl(req, i * sizeof(range), &range, 2901b72b71fSSagi Grimberg sizeof(range)); 291c6aa3542SChaitanya Kulkarni if (status) 292d5eff33eSChaitanya Kulkarni break; 2939c891c13SSagi Grimberg 294d5eff33eSChaitanya Kulkarni offset = le64_to_cpu(range.slba) << req->ns->blksize_shift; 2958eacd1bdSBart Van Assche len = le32_to_cpu(range.nlb); 2968eacd1bdSBart Van Assche len <<= req->ns->blksize_shift; 2979c891c13SSagi Grimberg if (offset + len > req->ns->size) { 298c6aa3542SChaitanya Kulkarni req->error_slba = le64_to_cpu(range.slba); 299c6aa3542SChaitanya Kulkarni status = errno_to_nvme_status(req, -ENOSPC); 3009c891c13SSagi Grimberg break; 3019c891c13SSagi Grimberg } 3029c891c13SSagi Grimberg 303c6aa3542SChaitanya Kulkarni ret = vfs_fallocate(req->ns->file, mode, offset, len); 304005c674fSChristoph Hellwig if (ret && ret != -EOPNOTSUPP) { 305c6aa3542SChaitanya Kulkarni req->error_slba = le64_to_cpu(range.slba); 306c6aa3542SChaitanya Kulkarni status = errno_to_nvme_status(req, ret); 307d5eff33eSChaitanya Kulkarni break; 308d5eff33eSChaitanya Kulkarni } 3091b72b71fSSagi Grimberg } 310d5eff33eSChaitanya Kulkarni 311c6aa3542SChaitanya Kulkarni nvmet_req_complete(req, status); 312d5eff33eSChaitanya Kulkarni } 313d5eff33eSChaitanya Kulkarni 314d5eff33eSChaitanya Kulkarni static void nvmet_file_dsm_work(struct work_struct *w) 315d5eff33eSChaitanya Kulkarni { 316d5eff33eSChaitanya Kulkarni struct nvmet_req *req = container_of(w, struct nvmet_req, f.work); 317d5eff33eSChaitanya Kulkarni 318d5eff33eSChaitanya Kulkarni switch (le32_to_cpu(req->cmd->dsm.attributes)) { 319d5eff33eSChaitanya Kulkarni case NVME_DSMGMT_AD: 320d5eff33eSChaitanya Kulkarni nvmet_file_execute_discard(req); 321d5eff33eSChaitanya Kulkarni return; 322d5eff33eSChaitanya Kulkarni case NVME_DSMGMT_IDR: 323d5eff33eSChaitanya Kulkarni case NVME_DSMGMT_IDW: 324d5eff33eSChaitanya Kulkarni default: 325d5eff33eSChaitanya Kulkarni /* Not supported yet */ 326d5eff33eSChaitanya Kulkarni nvmet_req_complete(req, 0); 327d5eff33eSChaitanya Kulkarni return; 328d5eff33eSChaitanya Kulkarni } 329d5eff33eSChaitanya Kulkarni } 330d5eff33eSChaitanya Kulkarni 331d5eff33eSChaitanya Kulkarni static void nvmet_file_execute_dsm(struct nvmet_req *req) 332d5eff33eSChaitanya Kulkarni { 333b716e688SSagi Grimberg if (!nvmet_check_data_len_lte(req, nvmet_dsm_len(req))) 334e9061c39SChristoph Hellwig return; 335d5eff33eSChaitanya Kulkarni INIT_WORK(&req->f.work, nvmet_file_dsm_work); 3368832cf92SSagi Grimberg queue_work(nvmet_wq, &req->f.work); 337d5eff33eSChaitanya Kulkarni } 338d5eff33eSChaitanya Kulkarni 339d5eff33eSChaitanya Kulkarni static void nvmet_file_write_zeroes_work(struct work_struct *w) 340d5eff33eSChaitanya Kulkarni { 341d5eff33eSChaitanya Kulkarni struct nvmet_req *req = container_of(w, struct nvmet_req, f.work); 342d5eff33eSChaitanya Kulkarni struct nvme_write_zeroes_cmd *write_zeroes = &req->cmd->write_zeroes; 343d5eff33eSChaitanya Kulkarni int mode = FALLOC_FL_ZERO_RANGE | FALLOC_FL_KEEP_SIZE; 344d5eff33eSChaitanya Kulkarni loff_t offset; 345d5eff33eSChaitanya Kulkarni loff_t len; 346d5eff33eSChaitanya Kulkarni int ret; 347d5eff33eSChaitanya Kulkarni 348d5eff33eSChaitanya Kulkarni offset = le64_to_cpu(write_zeroes->slba) << req->ns->blksize_shift; 349d5eff33eSChaitanya Kulkarni len = (((sector_t)le16_to_cpu(write_zeroes->length) + 1) << 350d5eff33eSChaitanya Kulkarni req->ns->blksize_shift); 351d5eff33eSChaitanya Kulkarni 3529c891c13SSagi Grimberg if (unlikely(offset + len > req->ns->size)) { 353c6aa3542SChaitanya Kulkarni nvmet_req_complete(req, errno_to_nvme_status(req, -ENOSPC)); 3549c891c13SSagi Grimberg return; 3559c891c13SSagi Grimberg } 3569c891c13SSagi Grimberg 357d5eff33eSChaitanya Kulkarni ret = vfs_fallocate(req->ns->file, mode, offset, len); 358c6aa3542SChaitanya Kulkarni nvmet_req_complete(req, ret < 0 ? errno_to_nvme_status(req, ret) : 0); 359d5eff33eSChaitanya Kulkarni } 360d5eff33eSChaitanya Kulkarni 361d5eff33eSChaitanya Kulkarni static void nvmet_file_execute_write_zeroes(struct nvmet_req *req) 362d5eff33eSChaitanya Kulkarni { 363136cc1ffSIsrael Rukshin if (!nvmet_check_transfer_len(req, 0)) 364e9061c39SChristoph Hellwig return; 365d5eff33eSChaitanya Kulkarni INIT_WORK(&req->f.work, nvmet_file_write_zeroes_work); 3668832cf92SSagi Grimberg queue_work(nvmet_wq, &req->f.work); 367d5eff33eSChaitanya Kulkarni } 368d5eff33eSChaitanya Kulkarni 369d5eff33eSChaitanya Kulkarni u16 nvmet_file_parse_io_cmd(struct nvmet_req *req) 370d5eff33eSChaitanya Kulkarni { 371f3dce2adSChaitanya Kulkarni switch (req->cmd->common.opcode) { 372d5eff33eSChaitanya Kulkarni case nvme_cmd_read: 373d5eff33eSChaitanya Kulkarni case nvme_cmd_write: 374d5eff33eSChaitanya Kulkarni req->execute = nvmet_file_execute_rw; 375d5eff33eSChaitanya Kulkarni return 0; 376d5eff33eSChaitanya Kulkarni case nvme_cmd_flush: 377d5eff33eSChaitanya Kulkarni req->execute = nvmet_file_execute_flush; 378d5eff33eSChaitanya Kulkarni return 0; 379d5eff33eSChaitanya Kulkarni case nvme_cmd_dsm: 380d5eff33eSChaitanya Kulkarni req->execute = nvmet_file_execute_dsm; 381d5eff33eSChaitanya Kulkarni return 0; 382d5eff33eSChaitanya Kulkarni case nvme_cmd_write_zeroes: 383d5eff33eSChaitanya Kulkarni req->execute = nvmet_file_execute_write_zeroes; 384d5eff33eSChaitanya Kulkarni return 0; 385d5eff33eSChaitanya Kulkarni default: 3861c2c7613SChaitanya Kulkarni return nvmet_report_invalid_opcode(req); 387d5eff33eSChaitanya Kulkarni } 388d5eff33eSChaitanya Kulkarni } 389