1 /*- 2 * BSD LICENSE 3 * 4 * Copyright (c) Intel Corporation. 5 * All rights reserved. 6 * Copyright (c) 2022 NVIDIA CORPORATION & AFFILIATES. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * * Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * * Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the 17 * distribution. 18 * * Neither the name of Intel Corporation nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 25 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 26 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 28 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 32 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include "spdk/stdinc.h" 36 #include "spdk/blob.h" 37 #include "spdk/log.h" 38 #include "blobstore.h" 39 40 static void 41 blob_bs_dev_write(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, void *payload, 42 uint64_t lba, uint32_t lba_count, 43 struct spdk_bs_dev_cb_args *cb_args) 44 { 45 cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, -EPERM); 46 assert(false); 47 } 48 49 static void 50 blob_bs_dev_writev(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, 51 struct iovec *iov, int iovcnt, 52 uint64_t lba, uint32_t lba_count, 53 struct spdk_bs_dev_cb_args *cb_args) 54 { 55 cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, -EPERM); 56 assert(false); 57 } 58 59 static void 60 blob_bs_dev_writev_ext(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, 61 struct iovec *iov, int iovcnt, 62 uint64_t lba, uint32_t lba_count, 63 struct spdk_bs_dev_cb_args *cb_args, 64 struct spdk_blob_ext_io_opts *ext_opts) 65 { 66 cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, -EPERM); 67 assert(false); 68 } 69 70 static void 71 blob_bs_dev_write_zeroes(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, 72 uint64_t lba, uint64_t lba_count, 73 struct spdk_bs_dev_cb_args *cb_args) 74 { 75 cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, -EPERM); 76 assert(false); 77 } 78 79 static void 80 blob_bs_dev_unmap(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, 81 uint64_t lba, uint64_t lba_count, 82 struct spdk_bs_dev_cb_args *cb_args) 83 { 84 cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, -EPERM); 85 assert(false); 86 } 87 88 static void 89 blob_bs_dev_read_cpl(void *cb_arg, int bserrno) 90 { 91 struct spdk_bs_dev_cb_args *cb_args = (struct spdk_bs_dev_cb_args *)cb_arg; 92 93 cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, bserrno); 94 } 95 96 static inline void 97 blob_bs_dev_read(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, void *payload, 98 uint64_t lba, uint32_t lba_count, struct spdk_bs_dev_cb_args *cb_args) 99 { 100 struct spdk_blob_bs_dev *b = (struct spdk_blob_bs_dev *)dev; 101 102 spdk_blob_io_read(b->blob, channel, payload, lba, lba_count, 103 blob_bs_dev_read_cpl, cb_args); 104 } 105 106 static inline void 107 blob_bs_dev_readv(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, 108 struct iovec *iov, int iovcnt, 109 uint64_t lba, uint32_t lba_count, struct spdk_bs_dev_cb_args *cb_args) 110 { 111 struct spdk_blob_bs_dev *b = (struct spdk_blob_bs_dev *)dev; 112 113 spdk_blob_io_readv(b->blob, channel, iov, iovcnt, lba, lba_count, 114 blob_bs_dev_read_cpl, cb_args); 115 } 116 117 static inline void 118 blob_bs_dev_readv_ext(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, 119 struct iovec *iov, int iovcnt, 120 uint64_t lba, uint32_t lba_count, struct spdk_bs_dev_cb_args *cb_args, 121 struct spdk_blob_ext_io_opts *ext_opts) 122 { 123 struct spdk_blob_bs_dev *b = (struct spdk_blob_bs_dev *)dev; 124 125 spdk_blob_io_readv_ext(b->blob, channel, iov, iovcnt, lba, lba_count, 126 blob_bs_dev_read_cpl, cb_args, ext_opts); 127 } 128 129 static void 130 blob_bs_dev_destroy_cpl(void *cb_arg, int bserrno) 131 { 132 if (bserrno != 0) { 133 SPDK_ERRLOG("Error on blob_bs_dev destroy: %d", bserrno); 134 } 135 136 /* Free blob_bs_dev */ 137 free(cb_arg); 138 } 139 140 static void 141 blob_bs_dev_destroy(struct spdk_bs_dev *bs_dev) 142 { 143 struct spdk_blob_bs_dev *b = (struct spdk_blob_bs_dev *)bs_dev; 144 145 spdk_blob_close(b->blob, blob_bs_dev_destroy_cpl, b); 146 } 147 148 149 struct spdk_bs_dev * 150 bs_create_blob_bs_dev(struct spdk_blob *blob) 151 { 152 struct spdk_blob_bs_dev *b; 153 154 b = calloc(1, sizeof(*b)); 155 if (b == NULL) { 156 return NULL; 157 } 158 /* snapshot blob */ 159 b->bs_dev.blockcnt = blob->active.num_clusters * 160 blob->bs->pages_per_cluster * bs_io_unit_per_page(blob->bs); 161 b->bs_dev.blocklen = spdk_bs_get_io_unit_size(blob->bs); 162 b->bs_dev.create_channel = NULL; 163 b->bs_dev.destroy_channel = NULL; 164 b->bs_dev.destroy = blob_bs_dev_destroy; 165 b->bs_dev.write = blob_bs_dev_write; 166 b->bs_dev.writev = blob_bs_dev_writev; 167 b->bs_dev.writev_ext = blob_bs_dev_writev_ext; 168 b->bs_dev.read = blob_bs_dev_read; 169 b->bs_dev.readv = blob_bs_dev_readv; 170 b->bs_dev.readv_ext = blob_bs_dev_readv_ext; 171 b->bs_dev.write_zeroes = blob_bs_dev_write_zeroes; 172 b->bs_dev.unmap = blob_bs_dev_unmap; 173 b->blob = blob; 174 175 return &b->bs_dev; 176 } 177