Line data Source code
1 : /* SPDX-License-Identifier: BSD-3-Clause
2 : * Copyright (C) 2018 Intel Corporation.
3 : * All rights reserved.
4 : * Copyright (c) 2022 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
5 : */
6 :
7 : #include "spdk/stdinc.h"
8 : #include "spdk/blob.h"
9 : #include "spdk/log.h"
10 : #include "blobstore.h"
11 :
12 : static void
13 0 : blob_bs_dev_write(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, void *payload,
14 : uint64_t lba, uint32_t lba_count,
15 : struct spdk_bs_dev_cb_args *cb_args)
16 : {
17 0 : cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, -EPERM);
18 0 : assert(false);
19 : }
20 :
21 : static void
22 0 : blob_bs_dev_writev(struct spdk_bs_dev *dev, struct spdk_io_channel *channel,
23 : struct iovec *iov, int iovcnt,
24 : uint64_t lba, uint32_t lba_count,
25 : struct spdk_bs_dev_cb_args *cb_args)
26 : {
27 0 : cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, -EPERM);
28 0 : assert(false);
29 : }
30 :
31 : static void
32 0 : blob_bs_dev_writev_ext(struct spdk_bs_dev *dev, struct spdk_io_channel *channel,
33 : struct iovec *iov, int iovcnt,
34 : uint64_t lba, uint32_t lba_count,
35 : struct spdk_bs_dev_cb_args *cb_args,
36 : struct spdk_blob_ext_io_opts *ext_opts)
37 : {
38 0 : cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, -EPERM);
39 0 : assert(false);
40 : }
41 :
42 : static void
43 0 : blob_bs_dev_write_zeroes(struct spdk_bs_dev *dev, struct spdk_io_channel *channel,
44 : uint64_t lba, uint64_t lba_count,
45 : struct spdk_bs_dev_cb_args *cb_args)
46 : {
47 0 : cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, -EPERM);
48 0 : assert(false);
49 : }
50 :
51 : static void
52 0 : blob_bs_dev_unmap(struct spdk_bs_dev *dev, struct spdk_io_channel *channel,
53 : uint64_t lba, uint64_t lba_count,
54 : struct spdk_bs_dev_cb_args *cb_args)
55 : {
56 0 : cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, -EPERM);
57 0 : assert(false);
58 : }
59 :
60 : static void
61 424 : blob_bs_dev_read_cpl(void *cb_arg, int bserrno)
62 : {
63 424 : struct spdk_bs_dev_cb_args *cb_args = (struct spdk_bs_dev_cb_args *)cb_arg;
64 :
65 424 : cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, bserrno);
66 424 : }
67 :
68 : static inline void
69 272 : blob_bs_dev_read(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, void *payload,
70 : uint64_t lba, uint32_t lba_count, struct spdk_bs_dev_cb_args *cb_args)
71 : {
72 272 : struct spdk_blob_bs_dev *b = (struct spdk_blob_bs_dev *)dev;
73 :
74 272 : spdk_blob_io_read(b->blob, channel, payload, lba, lba_count,
75 : blob_bs_dev_read_cpl, cb_args);
76 272 : }
77 :
78 : static inline void
79 80 : blob_bs_dev_readv(struct spdk_bs_dev *dev, struct spdk_io_channel *channel,
80 : struct iovec *iov, int iovcnt,
81 : uint64_t lba, uint32_t lba_count, struct spdk_bs_dev_cb_args *cb_args)
82 : {
83 80 : struct spdk_blob_bs_dev *b = (struct spdk_blob_bs_dev *)dev;
84 :
85 80 : spdk_blob_io_readv(b->blob, channel, iov, iovcnt, lba, lba_count,
86 : blob_bs_dev_read_cpl, cb_args);
87 80 : }
88 :
89 : static inline void
90 72 : blob_bs_dev_readv_ext(struct spdk_bs_dev *dev, struct spdk_io_channel *channel,
91 : struct iovec *iov, int iovcnt,
92 : uint64_t lba, uint32_t lba_count, struct spdk_bs_dev_cb_args *cb_args,
93 : struct spdk_blob_ext_io_opts *ext_opts)
94 : {
95 72 : struct spdk_blob_bs_dev *b = (struct spdk_blob_bs_dev *)dev;
96 :
97 72 : spdk_blob_io_readv_ext(b->blob, channel, iov, iovcnt, lba, lba_count,
98 : blob_bs_dev_read_cpl, cb_args, ext_opts);
99 72 : }
100 :
101 : static void
102 592 : blob_bs_dev_destroy_cpl(void *cb_arg, int bserrno)
103 : {
104 592 : if (bserrno != 0) {
105 0 : SPDK_ERRLOG("Error on blob_bs_dev destroy: %d", bserrno);
106 : }
107 :
108 : /* Free blob_bs_dev */
109 592 : free(cb_arg);
110 592 : }
111 :
112 : static void
113 592 : blob_bs_dev_destroy(struct spdk_bs_dev *bs_dev)
114 : {
115 592 : struct spdk_blob_bs_dev *b = (struct spdk_blob_bs_dev *)bs_dev;
116 :
117 592 : spdk_blob_close(b->blob, blob_bs_dev_destroy_cpl, b);
118 592 : }
119 :
120 : static bool
121 360 : blob_bs_is_zeroes(struct spdk_bs_dev *dev, uint64_t lba, uint64_t lba_count)
122 : {
123 360 : struct spdk_blob_bs_dev *b = (struct spdk_blob_bs_dev *)dev;
124 360 : struct spdk_blob *blob = b->blob;
125 :
126 360 : assert(lba == bs_cluster_to_lba(blob->bs, bs_lba_to_cluster(blob->bs, lba)));
127 360 : assert(lba_count == bs_dev_byte_to_lba(dev, blob->bs->cluster_sz));
128 :
129 360 : if (bs_io_unit_is_allocated(blob, lba)) {
130 216 : return false;
131 : }
132 :
133 144 : assert(blob->back_bs_dev != NULL);
134 144 : return blob->back_bs_dev->is_zeroes(blob->back_bs_dev,
135 : bs_io_unit_to_back_dev_lba(blob, lba),
136 : bs_io_unit_to_back_dev_lba(blob, lba_count));
137 : }
138 :
139 : static bool
140 180 : blob_bs_translate_lba(struct spdk_bs_dev *dev, uint64_t lba, uint64_t *base_lba)
141 : {
142 180 : struct spdk_blob_bs_dev *b = (struct spdk_blob_bs_dev *)dev;
143 180 : struct spdk_blob *blob = b->blob;
144 :
145 180 : assert(base_lba != NULL);
146 180 : if (bs_io_unit_is_allocated(blob, lba)) {
147 108 : *base_lba = bs_blob_io_unit_to_lba(blob, lba);
148 108 : return true;
149 : }
150 :
151 72 : assert(blob->back_bs_dev != NULL);
152 72 : return blob->back_bs_dev->translate_lba(blob->back_bs_dev,
153 : bs_io_unit_to_back_dev_lba(blob, lba),
154 : base_lba);
155 : }
156 :
157 : static bool
158 0 : blob_bs_is_degraded(struct spdk_bs_dev *dev)
159 : {
160 0 : struct spdk_blob_bs_dev *b = (struct spdk_blob_bs_dev *)dev;
161 :
162 0 : return spdk_blob_is_degraded(b->blob);
163 : }
164 :
165 : struct spdk_bs_dev *
166 592 : bs_create_blob_bs_dev(struct spdk_blob *blob)
167 : {
168 : struct spdk_blob_bs_dev *b;
169 :
170 592 : b = calloc(1, sizeof(*b));
171 592 : if (b == NULL) {
172 0 : return NULL;
173 : }
174 : /* snapshot blob */
175 1184 : b->bs_dev.blockcnt = blob->active.num_clusters *
176 592 : blob->bs->pages_per_cluster * bs_io_unit_per_page(blob->bs);
177 592 : b->bs_dev.blocklen = spdk_bs_get_io_unit_size(blob->bs);
178 592 : b->bs_dev.create_channel = NULL;
179 592 : b->bs_dev.destroy_channel = NULL;
180 592 : b->bs_dev.destroy = blob_bs_dev_destroy;
181 592 : b->bs_dev.write = blob_bs_dev_write;
182 592 : b->bs_dev.writev = blob_bs_dev_writev;
183 592 : b->bs_dev.writev_ext = blob_bs_dev_writev_ext;
184 592 : b->bs_dev.read = blob_bs_dev_read;
185 592 : b->bs_dev.readv = blob_bs_dev_readv;
186 592 : b->bs_dev.readv_ext = blob_bs_dev_readv_ext;
187 592 : b->bs_dev.write_zeroes = blob_bs_dev_write_zeroes;
188 592 : b->bs_dev.unmap = blob_bs_dev_unmap;
189 592 : b->bs_dev.is_zeroes = blob_bs_is_zeroes;
190 592 : b->bs_dev.translate_lba = blob_bs_translate_lba;
191 592 : b->bs_dev.is_degraded = blob_bs_is_degraded;
192 592 : b->blob = blob;
193 :
194 592 : return &b->bs_dev;
195 : }
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