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 16d5eff33eSChaitanya Kulkarni void nvmet_file_ns_disable(struct nvmet_ns *ns) 17d5eff33eSChaitanya Kulkarni { 18d5eff33eSChaitanya Kulkarni if (ns->file) { 1955eb942eSChaitanya Kulkarni if (ns->buffered_io) 2055eb942eSChaitanya Kulkarni flush_workqueue(buffered_io_wq); 21d5eff33eSChaitanya Kulkarni mempool_destroy(ns->bvec_pool); 22d5eff33eSChaitanya Kulkarni ns->bvec_pool = NULL; 23d5eff33eSChaitanya Kulkarni kmem_cache_destroy(ns->bvec_cache); 24d5eff33eSChaitanya Kulkarni ns->bvec_cache = NULL; 25d5eff33eSChaitanya Kulkarni fput(ns->file); 26d5eff33eSChaitanya Kulkarni ns->file = NULL; 27d5eff33eSChaitanya Kulkarni } 28d5eff33eSChaitanya Kulkarni } 29d5eff33eSChaitanya Kulkarni 30d5eff33eSChaitanya Kulkarni int nvmet_file_ns_enable(struct nvmet_ns *ns) 31d5eff33eSChaitanya Kulkarni { 3255eb942eSChaitanya Kulkarni int flags = O_RDWR | O_LARGEFILE; 33d5eff33eSChaitanya Kulkarni struct kstat stat; 3455eb942eSChaitanya Kulkarni int ret; 35d5eff33eSChaitanya Kulkarni 3655eb942eSChaitanya Kulkarni if (!ns->buffered_io) 3755eb942eSChaitanya Kulkarni flags |= O_DIRECT; 3855eb942eSChaitanya Kulkarni 3955eb942eSChaitanya Kulkarni ns->file = filp_open(ns->device_path, flags, 0); 40d5eff33eSChaitanya Kulkarni if (IS_ERR(ns->file)) { 41d5eff33eSChaitanya Kulkarni pr_err("failed to open file %s: (%ld)\n", 4281cf54e0SWei Yongjun ns->device_path, PTR_ERR(ns->file)); 43d5eff33eSChaitanya Kulkarni return PTR_ERR(ns->file); 44d5eff33eSChaitanya Kulkarni } 45d5eff33eSChaitanya Kulkarni 46d5eff33eSChaitanya Kulkarni ret = vfs_getattr(&ns->file->f_path, 47d5eff33eSChaitanya Kulkarni &stat, STATX_SIZE, AT_STATX_FORCE_SYNC); 48d5eff33eSChaitanya Kulkarni if (ret) 49d5eff33eSChaitanya Kulkarni goto err; 50d5eff33eSChaitanya Kulkarni 51d5eff33eSChaitanya Kulkarni ns->size = stat.size; 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_cache = kmem_cache_create("nvmet-bvec", 60d5eff33eSChaitanya Kulkarni NVMET_MAX_MPOOL_BVEC * sizeof(struct bio_vec), 61d5eff33eSChaitanya Kulkarni 0, SLAB_HWCACHE_ALIGN, NULL); 621367bc82SWei Yongjun if (!ns->bvec_cache) { 631367bc82SWei Yongjun ret = -ENOMEM; 64d5eff33eSChaitanya Kulkarni goto err; 651367bc82SWei Yongjun } 66d5eff33eSChaitanya Kulkarni 67d5eff33eSChaitanya Kulkarni ns->bvec_pool = mempool_create(NVMET_MIN_MPOOL_OBJ, mempool_alloc_slab, 68d5eff33eSChaitanya Kulkarni mempool_free_slab, ns->bvec_cache); 69d5eff33eSChaitanya Kulkarni 701367bc82SWei Yongjun if (!ns->bvec_pool) { 711367bc82SWei Yongjun ret = -ENOMEM; 72d5eff33eSChaitanya Kulkarni goto err; 731367bc82SWei Yongjun } 74d5eff33eSChaitanya Kulkarni 75d5eff33eSChaitanya Kulkarni return ret; 76d5eff33eSChaitanya Kulkarni err: 77d5eff33eSChaitanya Kulkarni ns->size = 0; 78d5eff33eSChaitanya Kulkarni ns->blksize_shift = 0; 79d5eff33eSChaitanya Kulkarni nvmet_file_ns_disable(ns); 80d5eff33eSChaitanya Kulkarni return ret; 81d5eff33eSChaitanya Kulkarni } 82d5eff33eSChaitanya Kulkarni 8302db9954SMing Lei static void nvmet_file_init_bvec(struct bio_vec *bv, struct scatterlist *sg) 84d5eff33eSChaitanya Kulkarni { 8502db9954SMing Lei bv->bv_page = sg_page(sg); 8602db9954SMing Lei bv->bv_offset = sg->offset; 8702db9954SMing Lei bv->bv_len = sg->length; 88d5eff33eSChaitanya Kulkarni } 89d5eff33eSChaitanya Kulkarni 90d5eff33eSChaitanya Kulkarni static ssize_t nvmet_file_submit_bvec(struct nvmet_req *req, loff_t pos, 9150a909dbSChaitanya Kulkarni unsigned long nr_segs, size_t count, int ki_flags) 92d5eff33eSChaitanya Kulkarni { 93d5eff33eSChaitanya Kulkarni struct kiocb *iocb = &req->f.iocb; 94d5eff33eSChaitanya Kulkarni ssize_t (*call_iter)(struct kiocb *iocb, struct iov_iter *iter); 95d5eff33eSChaitanya Kulkarni struct iov_iter iter; 9650a909dbSChaitanya Kulkarni int rw; 97d5eff33eSChaitanya Kulkarni 98d5eff33eSChaitanya Kulkarni if (req->cmd->rw.opcode == nvme_cmd_write) { 99d5eff33eSChaitanya Kulkarni if (req->cmd->rw.control & cpu_to_le16(NVME_RW_FUA)) 10050a909dbSChaitanya Kulkarni ki_flags |= IOCB_DSYNC; 101d5eff33eSChaitanya Kulkarni call_iter = req->ns->file->f_op->write_iter; 102d5eff33eSChaitanya Kulkarni rw = WRITE; 103d5eff33eSChaitanya Kulkarni } else { 104d5eff33eSChaitanya Kulkarni call_iter = req->ns->file->f_op->read_iter; 105d5eff33eSChaitanya Kulkarni rw = READ; 106d5eff33eSChaitanya Kulkarni } 107d5eff33eSChaitanya Kulkarni 108aa563d7bSDavid Howells iov_iter_bvec(&iter, rw, req->f.bvec, nr_segs, count); 109d5eff33eSChaitanya Kulkarni 110d5eff33eSChaitanya Kulkarni iocb->ki_pos = pos; 111d5eff33eSChaitanya Kulkarni iocb->ki_filp = req->ns->file; 11255eb942eSChaitanya Kulkarni iocb->ki_flags = ki_flags | iocb_flags(req->ns->file); 113d5eff33eSChaitanya Kulkarni 11450a909dbSChaitanya Kulkarni return call_iter(iocb, &iter); 115d5eff33eSChaitanya Kulkarni } 116d5eff33eSChaitanya Kulkarni 117d5eff33eSChaitanya Kulkarni static void nvmet_file_io_done(struct kiocb *iocb, long ret, long ret2) 118d5eff33eSChaitanya Kulkarni { 119d5eff33eSChaitanya Kulkarni struct nvmet_req *req = container_of(iocb, struct nvmet_req, f.iocb); 120c6aa3542SChaitanya Kulkarni u16 status = NVME_SC_SUCCESS; 121d5eff33eSChaitanya Kulkarni 122d5eff33eSChaitanya Kulkarni if (req->f.bvec != req->inline_bvec) { 123d5eff33eSChaitanya Kulkarni if (likely(req->f.mpool_alloc == false)) 124d5eff33eSChaitanya Kulkarni kfree(req->f.bvec); 125d5eff33eSChaitanya Kulkarni else 126d5eff33eSChaitanya Kulkarni mempool_free(req->f.bvec, req->ns->bvec_pool); 127d5eff33eSChaitanya Kulkarni } 128d5eff33eSChaitanya Kulkarni 129e9061c39SChristoph Hellwig if (unlikely(ret != req->transfer_len)) 130c6aa3542SChaitanya Kulkarni status = errno_to_nvme_status(req, ret); 131c6aa3542SChaitanya Kulkarni nvmet_req_complete(req, status); 132d5eff33eSChaitanya Kulkarni } 133d5eff33eSChaitanya Kulkarni 13450a909dbSChaitanya Kulkarni static bool nvmet_file_execute_io(struct nvmet_req *req, int ki_flags) 135d5eff33eSChaitanya Kulkarni { 13602db9954SMing Lei ssize_t nr_bvec = req->sg_cnt; 137d5eff33eSChaitanya Kulkarni unsigned long bv_cnt = 0; 138d5eff33eSChaitanya Kulkarni bool is_sync = false; 139d5eff33eSChaitanya Kulkarni size_t len = 0, total_len = 0; 140d5eff33eSChaitanya Kulkarni ssize_t ret = 0; 141d5eff33eSChaitanya Kulkarni loff_t pos; 14202db9954SMing Lei int i; 14302db9954SMing Lei struct scatterlist *sg; 14450a909dbSChaitanya Kulkarni 14550a909dbSChaitanya Kulkarni if (req->f.mpool_alloc && nr_bvec > NVMET_MAX_MPOOL_BVEC) 14650a909dbSChaitanya Kulkarni is_sync = true; 147d5eff33eSChaitanya Kulkarni 1489c891c13SSagi Grimberg pos = le64_to_cpu(req->cmd->rw.slba) << req->ns->blksize_shift; 149e9061c39SChristoph Hellwig if (unlikely(pos + req->transfer_len > req->ns->size)) { 150c6aa3542SChaitanya Kulkarni nvmet_req_complete(req, errno_to_nvme_status(req, -ENOSPC)); 15150a909dbSChaitanya Kulkarni return true; 152d5eff33eSChaitanya Kulkarni } 153d5eff33eSChaitanya Kulkarni 154d5eff33eSChaitanya Kulkarni memset(&req->f.iocb, 0, sizeof(struct kiocb)); 15502db9954SMing Lei for_each_sg(req->sg, sg, req->sg_cnt, i) { 15602db9954SMing Lei nvmet_file_init_bvec(&req->f.bvec[bv_cnt], sg); 157d5eff33eSChaitanya Kulkarni len += req->f.bvec[bv_cnt].bv_len; 158d5eff33eSChaitanya Kulkarni total_len += req->f.bvec[bv_cnt].bv_len; 159d5eff33eSChaitanya Kulkarni bv_cnt++; 160d5eff33eSChaitanya Kulkarni 161d5eff33eSChaitanya Kulkarni WARN_ON_ONCE((nr_bvec - 1) < 0); 162d5eff33eSChaitanya Kulkarni 163d5eff33eSChaitanya Kulkarni if (unlikely(is_sync) && 164d5eff33eSChaitanya Kulkarni (nr_bvec - 1 == 0 || bv_cnt == NVMET_MAX_MPOOL_BVEC)) { 16550a909dbSChaitanya Kulkarni ret = nvmet_file_submit_bvec(req, pos, bv_cnt, len, 0); 166d5eff33eSChaitanya Kulkarni if (ret < 0) 16750a909dbSChaitanya Kulkarni goto complete; 16850a909dbSChaitanya Kulkarni 169d5eff33eSChaitanya Kulkarni pos += len; 170d5eff33eSChaitanya Kulkarni bv_cnt = 0; 171d5eff33eSChaitanya Kulkarni len = 0; 172d5eff33eSChaitanya Kulkarni } 173d5eff33eSChaitanya Kulkarni nr_bvec--; 174d5eff33eSChaitanya Kulkarni } 175d5eff33eSChaitanya Kulkarni 176e9061c39SChristoph Hellwig if (WARN_ON_ONCE(total_len != req->transfer_len)) { 177d5eff33eSChaitanya Kulkarni ret = -EIO; 17850a909dbSChaitanya Kulkarni goto complete; 179d5eff33eSChaitanya Kulkarni } 18050a909dbSChaitanya Kulkarni 18150a909dbSChaitanya Kulkarni if (unlikely(is_sync)) { 18250a909dbSChaitanya Kulkarni ret = total_len; 18350a909dbSChaitanya Kulkarni goto complete; 18450a909dbSChaitanya Kulkarni } 18550a909dbSChaitanya Kulkarni 18650a909dbSChaitanya Kulkarni /* 18750a909dbSChaitanya Kulkarni * A NULL ki_complete ask for synchronous execution, which we want 18850a909dbSChaitanya Kulkarni * for the IOCB_NOWAIT case. 18950a909dbSChaitanya Kulkarni */ 19050a909dbSChaitanya Kulkarni if (!(ki_flags & IOCB_NOWAIT)) 191d5eff33eSChaitanya Kulkarni req->f.iocb.ki_complete = nvmet_file_io_done; 19250a909dbSChaitanya Kulkarni 19350a909dbSChaitanya Kulkarni ret = nvmet_file_submit_bvec(req, pos, bv_cnt, total_len, ki_flags); 19450a909dbSChaitanya Kulkarni 19550a909dbSChaitanya Kulkarni switch (ret) { 19650a909dbSChaitanya Kulkarni case -EIOCBQUEUED: 19750a909dbSChaitanya Kulkarni return true; 19850a909dbSChaitanya Kulkarni case -EAGAIN: 19950a909dbSChaitanya Kulkarni if (WARN_ON_ONCE(!(ki_flags & IOCB_NOWAIT))) 20050a909dbSChaitanya Kulkarni goto complete; 20150a909dbSChaitanya Kulkarni return false; 20250a909dbSChaitanya Kulkarni case -EOPNOTSUPP: 20350a909dbSChaitanya Kulkarni /* 20450a909dbSChaitanya Kulkarni * For file systems returning error -EOPNOTSUPP, handle 20550a909dbSChaitanya Kulkarni * IOCB_NOWAIT error case separately and retry without 20650a909dbSChaitanya Kulkarni * IOCB_NOWAIT. 20750a909dbSChaitanya Kulkarni */ 20850a909dbSChaitanya Kulkarni if ((ki_flags & IOCB_NOWAIT)) 20950a909dbSChaitanya Kulkarni return false; 21050a909dbSChaitanya Kulkarni break; 21150a909dbSChaitanya Kulkarni } 21250a909dbSChaitanya Kulkarni 21350a909dbSChaitanya Kulkarni complete: 21450a909dbSChaitanya Kulkarni nvmet_file_io_done(&req->f.iocb, ret, 0); 21550a909dbSChaitanya Kulkarni return true; 216d5eff33eSChaitanya Kulkarni } 217d5eff33eSChaitanya Kulkarni 21855eb942eSChaitanya Kulkarni static void nvmet_file_buffered_io_work(struct work_struct *w) 21955eb942eSChaitanya Kulkarni { 22055eb942eSChaitanya Kulkarni struct nvmet_req *req = container_of(w, struct nvmet_req, f.work); 22155eb942eSChaitanya Kulkarni 22250a909dbSChaitanya Kulkarni nvmet_file_execute_io(req, 0); 22355eb942eSChaitanya Kulkarni } 22455eb942eSChaitanya Kulkarni 22550a909dbSChaitanya Kulkarni static void nvmet_file_submit_buffered_io(struct nvmet_req *req) 22655eb942eSChaitanya Kulkarni { 22755eb942eSChaitanya Kulkarni INIT_WORK(&req->f.work, nvmet_file_buffered_io_work); 22855eb942eSChaitanya Kulkarni queue_work(buffered_io_wq, &req->f.work); 22955eb942eSChaitanya Kulkarni } 23055eb942eSChaitanya Kulkarni 23150a909dbSChaitanya Kulkarni static void nvmet_file_execute_rw(struct nvmet_req *req) 23250a909dbSChaitanya Kulkarni { 23302db9954SMing Lei ssize_t nr_bvec = req->sg_cnt; 23450a909dbSChaitanya Kulkarni 235e9061c39SChristoph Hellwig if (!nvmet_check_data_len(req, nvmet_rw_len(req))) 236e9061c39SChristoph Hellwig return; 237e9061c39SChristoph Hellwig 23850a909dbSChaitanya Kulkarni if (!req->sg_cnt || !nr_bvec) { 23950a909dbSChaitanya Kulkarni nvmet_req_complete(req, 0); 24050a909dbSChaitanya Kulkarni return; 24150a909dbSChaitanya Kulkarni } 24250a909dbSChaitanya Kulkarni 24350a909dbSChaitanya Kulkarni if (nr_bvec > NVMET_MAX_INLINE_BIOVEC) 24450a909dbSChaitanya Kulkarni req->f.bvec = kmalloc_array(nr_bvec, sizeof(struct bio_vec), 24550a909dbSChaitanya Kulkarni GFP_KERNEL); 24650a909dbSChaitanya Kulkarni else 24750a909dbSChaitanya Kulkarni req->f.bvec = req->inline_bvec; 24850a909dbSChaitanya Kulkarni 24950a909dbSChaitanya Kulkarni if (unlikely(!req->f.bvec)) { 25050a909dbSChaitanya Kulkarni /* fallback under memory pressure */ 25150a909dbSChaitanya Kulkarni req->f.bvec = mempool_alloc(req->ns->bvec_pool, GFP_KERNEL); 25250a909dbSChaitanya Kulkarni req->f.mpool_alloc = true; 25350a909dbSChaitanya Kulkarni } else 25450a909dbSChaitanya Kulkarni req->f.mpool_alloc = false; 25550a909dbSChaitanya Kulkarni 25650a909dbSChaitanya Kulkarni if (req->ns->buffered_io) { 25750a909dbSChaitanya Kulkarni if (likely(!req->f.mpool_alloc) && 25850a909dbSChaitanya Kulkarni nvmet_file_execute_io(req, IOCB_NOWAIT)) 25950a909dbSChaitanya Kulkarni return; 26050a909dbSChaitanya Kulkarni nvmet_file_submit_buffered_io(req); 26150a909dbSChaitanya Kulkarni } else 26250a909dbSChaitanya Kulkarni nvmet_file_execute_io(req, 0); 26350a909dbSChaitanya Kulkarni } 26450a909dbSChaitanya Kulkarni 265dedf0be5SChaitanya Kulkarni u16 nvmet_file_flush(struct nvmet_req *req) 266dedf0be5SChaitanya Kulkarni { 267c6aa3542SChaitanya Kulkarni return errno_to_nvme_status(req, vfs_fsync(req->ns->file, 1)); 268dedf0be5SChaitanya Kulkarni } 269dedf0be5SChaitanya Kulkarni 270d5eff33eSChaitanya Kulkarni static void nvmet_file_flush_work(struct work_struct *w) 271d5eff33eSChaitanya Kulkarni { 272d5eff33eSChaitanya Kulkarni struct nvmet_req *req = container_of(w, struct nvmet_req, f.work); 273d5eff33eSChaitanya Kulkarni 274dedf0be5SChaitanya Kulkarni nvmet_req_complete(req, nvmet_file_flush(req)); 275d5eff33eSChaitanya Kulkarni } 276d5eff33eSChaitanya Kulkarni 277d5eff33eSChaitanya Kulkarni static void nvmet_file_execute_flush(struct nvmet_req *req) 278d5eff33eSChaitanya Kulkarni { 279e9061c39SChristoph Hellwig if (!nvmet_check_data_len(req, 0)) 280e9061c39SChristoph Hellwig return; 281d5eff33eSChaitanya Kulkarni INIT_WORK(&req->f.work, nvmet_file_flush_work); 282d5eff33eSChaitanya Kulkarni schedule_work(&req->f.work); 283d5eff33eSChaitanya Kulkarni } 284d5eff33eSChaitanya Kulkarni 285d5eff33eSChaitanya Kulkarni static void nvmet_file_execute_discard(struct nvmet_req *req) 286d5eff33eSChaitanya Kulkarni { 287d5eff33eSChaitanya Kulkarni int mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE; 288d5eff33eSChaitanya Kulkarni struct nvme_dsm_range range; 2891b72b71fSSagi Grimberg loff_t offset, len; 290c6aa3542SChaitanya Kulkarni u16 status = 0; 291c6aa3542SChaitanya Kulkarni int ret; 2921b72b71fSSagi Grimberg int i; 293d5eff33eSChaitanya Kulkarni 294d5eff33eSChaitanya Kulkarni for (i = 0; i <= le32_to_cpu(req->cmd->dsm.nr); i++) { 295c6aa3542SChaitanya Kulkarni status = nvmet_copy_from_sgl(req, i * sizeof(range), &range, 2961b72b71fSSagi Grimberg sizeof(range)); 297c6aa3542SChaitanya Kulkarni if (status) 298d5eff33eSChaitanya Kulkarni break; 2999c891c13SSagi Grimberg 300d5eff33eSChaitanya Kulkarni offset = le64_to_cpu(range.slba) << req->ns->blksize_shift; 3018eacd1bdSBart Van Assche len = le32_to_cpu(range.nlb); 3028eacd1bdSBart Van Assche len <<= req->ns->blksize_shift; 3039c891c13SSagi Grimberg if (offset + len > req->ns->size) { 304c6aa3542SChaitanya Kulkarni req->error_slba = le64_to_cpu(range.slba); 305c6aa3542SChaitanya Kulkarni status = errno_to_nvme_status(req, -ENOSPC); 3069c891c13SSagi Grimberg break; 3079c891c13SSagi Grimberg } 3089c891c13SSagi Grimberg 309c6aa3542SChaitanya Kulkarni ret = vfs_fallocate(req->ns->file, mode, offset, len); 310005c674fSChristoph Hellwig if (ret && ret != -EOPNOTSUPP) { 311c6aa3542SChaitanya Kulkarni req->error_slba = le64_to_cpu(range.slba); 312c6aa3542SChaitanya Kulkarni status = errno_to_nvme_status(req, ret); 313d5eff33eSChaitanya Kulkarni break; 314d5eff33eSChaitanya Kulkarni } 3151b72b71fSSagi Grimberg } 316d5eff33eSChaitanya Kulkarni 317c6aa3542SChaitanya Kulkarni nvmet_req_complete(req, status); 318d5eff33eSChaitanya Kulkarni } 319d5eff33eSChaitanya Kulkarni 320d5eff33eSChaitanya Kulkarni static void nvmet_file_dsm_work(struct work_struct *w) 321d5eff33eSChaitanya Kulkarni { 322d5eff33eSChaitanya Kulkarni struct nvmet_req *req = container_of(w, struct nvmet_req, f.work); 323d5eff33eSChaitanya Kulkarni 324d5eff33eSChaitanya Kulkarni switch (le32_to_cpu(req->cmd->dsm.attributes)) { 325d5eff33eSChaitanya Kulkarni case NVME_DSMGMT_AD: 326d5eff33eSChaitanya Kulkarni nvmet_file_execute_discard(req); 327d5eff33eSChaitanya Kulkarni return; 328d5eff33eSChaitanya Kulkarni case NVME_DSMGMT_IDR: 329d5eff33eSChaitanya Kulkarni case NVME_DSMGMT_IDW: 330d5eff33eSChaitanya Kulkarni default: 331d5eff33eSChaitanya Kulkarni /* Not supported yet */ 332d5eff33eSChaitanya Kulkarni nvmet_req_complete(req, 0); 333d5eff33eSChaitanya Kulkarni return; 334d5eff33eSChaitanya Kulkarni } 335d5eff33eSChaitanya Kulkarni } 336d5eff33eSChaitanya Kulkarni 337d5eff33eSChaitanya Kulkarni static void nvmet_file_execute_dsm(struct nvmet_req *req) 338d5eff33eSChaitanya Kulkarni { 339e9061c39SChristoph Hellwig if (!nvmet_check_data_len(req, nvmet_dsm_len(req))) 340e9061c39SChristoph Hellwig return; 341d5eff33eSChaitanya Kulkarni INIT_WORK(&req->f.work, nvmet_file_dsm_work); 342d5eff33eSChaitanya Kulkarni schedule_work(&req->f.work); 343d5eff33eSChaitanya Kulkarni } 344d5eff33eSChaitanya Kulkarni 345d5eff33eSChaitanya Kulkarni static void nvmet_file_write_zeroes_work(struct work_struct *w) 346d5eff33eSChaitanya Kulkarni { 347d5eff33eSChaitanya Kulkarni struct nvmet_req *req = container_of(w, struct nvmet_req, f.work); 348d5eff33eSChaitanya Kulkarni struct nvme_write_zeroes_cmd *write_zeroes = &req->cmd->write_zeroes; 349d5eff33eSChaitanya Kulkarni int mode = FALLOC_FL_ZERO_RANGE | FALLOC_FL_KEEP_SIZE; 350d5eff33eSChaitanya Kulkarni loff_t offset; 351d5eff33eSChaitanya Kulkarni loff_t len; 352d5eff33eSChaitanya Kulkarni int ret; 353d5eff33eSChaitanya Kulkarni 354d5eff33eSChaitanya Kulkarni offset = le64_to_cpu(write_zeroes->slba) << req->ns->blksize_shift; 355d5eff33eSChaitanya Kulkarni len = (((sector_t)le16_to_cpu(write_zeroes->length) + 1) << 356d5eff33eSChaitanya Kulkarni req->ns->blksize_shift); 357d5eff33eSChaitanya Kulkarni 3589c891c13SSagi Grimberg if (unlikely(offset + len > req->ns->size)) { 359c6aa3542SChaitanya Kulkarni nvmet_req_complete(req, errno_to_nvme_status(req, -ENOSPC)); 3609c891c13SSagi Grimberg return; 3619c891c13SSagi Grimberg } 3629c891c13SSagi Grimberg 363d5eff33eSChaitanya Kulkarni ret = vfs_fallocate(req->ns->file, mode, offset, len); 364c6aa3542SChaitanya Kulkarni nvmet_req_complete(req, ret < 0 ? errno_to_nvme_status(req, ret) : 0); 365d5eff33eSChaitanya Kulkarni } 366d5eff33eSChaitanya Kulkarni 367d5eff33eSChaitanya Kulkarni static void nvmet_file_execute_write_zeroes(struct nvmet_req *req) 368d5eff33eSChaitanya Kulkarni { 369e9061c39SChristoph Hellwig if (!nvmet_check_data_len(req, 0)) 370e9061c39SChristoph Hellwig return; 371d5eff33eSChaitanya Kulkarni INIT_WORK(&req->f.work, nvmet_file_write_zeroes_work); 372d5eff33eSChaitanya Kulkarni schedule_work(&req->f.work); 373d5eff33eSChaitanya Kulkarni } 374d5eff33eSChaitanya Kulkarni 375d5eff33eSChaitanya Kulkarni u16 nvmet_file_parse_io_cmd(struct nvmet_req *req) 376d5eff33eSChaitanya Kulkarni { 377d5eff33eSChaitanya Kulkarni struct nvme_command *cmd = req->cmd; 378d5eff33eSChaitanya Kulkarni 379d5eff33eSChaitanya Kulkarni switch (cmd->common.opcode) { 380d5eff33eSChaitanya Kulkarni case nvme_cmd_read: 381d5eff33eSChaitanya Kulkarni case nvme_cmd_write: 382d5eff33eSChaitanya Kulkarni req->execute = nvmet_file_execute_rw; 383d5eff33eSChaitanya Kulkarni return 0; 384d5eff33eSChaitanya Kulkarni case nvme_cmd_flush: 385d5eff33eSChaitanya Kulkarni req->execute = nvmet_file_execute_flush; 386d5eff33eSChaitanya Kulkarni return 0; 387d5eff33eSChaitanya Kulkarni case nvme_cmd_dsm: 388d5eff33eSChaitanya Kulkarni req->execute = nvmet_file_execute_dsm; 389d5eff33eSChaitanya Kulkarni return 0; 390d5eff33eSChaitanya Kulkarni case nvme_cmd_write_zeroes: 391d5eff33eSChaitanya Kulkarni req->execute = nvmet_file_execute_write_zeroes; 392d5eff33eSChaitanya Kulkarni return 0; 393d5eff33eSChaitanya Kulkarni default: 394d5eff33eSChaitanya Kulkarni pr_err("unhandled cmd for file ns %d on qid %d\n", 395d5eff33eSChaitanya Kulkarni cmd->common.opcode, req->sq->qid); 396c6aa3542SChaitanya Kulkarni req->error_loc = offsetof(struct nvme_common_command, opcode); 397d5eff33eSChaitanya Kulkarni return NVME_SC_INVALID_OPCODE | NVME_SC_DNR; 398d5eff33eSChaitanya Kulkarni } 399d5eff33eSChaitanya Kulkarni } 400