root / block / blkverify.c @ 34b5d2c6
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1 | d9d33417 | Stefan Hajnoczi | /*
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2 | d9d33417 | Stefan Hajnoczi | * Block protocol for block driver correctness testing
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3 | d9d33417 | Stefan Hajnoczi | *
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4 | d9d33417 | Stefan Hajnoczi | * Copyright (C) 2010 IBM, Corp.
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5 | d9d33417 | Stefan Hajnoczi | *
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6 | d9d33417 | Stefan Hajnoczi | * This work is licensed under the terms of the GNU GPL, version 2 or later.
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7 | d9d33417 | Stefan Hajnoczi | * See the COPYING file in the top-level directory.
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8 | d9d33417 | Stefan Hajnoczi | */
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9 | d9d33417 | Stefan Hajnoczi | |
10 | d9d33417 | Stefan Hajnoczi | #include <stdarg.h> |
11 | 1de7afc9 | Paolo Bonzini | #include "qemu/sockets.h" /* for EINPROGRESS on Windows */ |
12 | 737e150e | Paolo Bonzini | #include "block/block_int.h" |
13 | d9d33417 | Stefan Hajnoczi | |
14 | d9d33417 | Stefan Hajnoczi | typedef struct { |
15 | d9d33417 | Stefan Hajnoczi | BlockDriverState *test_file; |
16 | d9d33417 | Stefan Hajnoczi | } BDRVBlkverifyState; |
17 | d9d33417 | Stefan Hajnoczi | |
18 | d9d33417 | Stefan Hajnoczi | typedef struct BlkverifyAIOCB BlkverifyAIOCB; |
19 | d9d33417 | Stefan Hajnoczi | struct BlkverifyAIOCB {
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20 | d9d33417 | Stefan Hajnoczi | BlockDriverAIOCB common; |
21 | d9d33417 | Stefan Hajnoczi | QEMUBH *bh; |
22 | d9d33417 | Stefan Hajnoczi | |
23 | d9d33417 | Stefan Hajnoczi | /* Request metadata */
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24 | d9d33417 | Stefan Hajnoczi | bool is_write;
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25 | d9d33417 | Stefan Hajnoczi | int64_t sector_num; |
26 | d9d33417 | Stefan Hajnoczi | int nb_sectors;
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27 | d9d33417 | Stefan Hajnoczi | |
28 | d9d33417 | Stefan Hajnoczi | int ret; /* first completed request's result */ |
29 | d9d33417 | Stefan Hajnoczi | unsigned int done; /* completion counter */ |
30 | d9d33417 | Stefan Hajnoczi | bool *finished; /* completion signal for cancel */ |
31 | d9d33417 | Stefan Hajnoczi | |
32 | d9d33417 | Stefan Hajnoczi | QEMUIOVector *qiov; /* user I/O vector */
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33 | d9d33417 | Stefan Hajnoczi | QEMUIOVector raw_qiov; /* cloned I/O vector for raw file */
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34 | d9d33417 | Stefan Hajnoczi | void *buf; /* buffer for raw file I/O */ |
35 | d9d33417 | Stefan Hajnoczi | |
36 | d9d33417 | Stefan Hajnoczi | void (*verify)(BlkverifyAIOCB *acb);
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37 | d9d33417 | Stefan Hajnoczi | }; |
38 | d9d33417 | Stefan Hajnoczi | |
39 | d9d33417 | Stefan Hajnoczi | static void blkverify_aio_cancel(BlockDriverAIOCB *blockacb) |
40 | d9d33417 | Stefan Hajnoczi | { |
41 | d9d33417 | Stefan Hajnoczi | BlkverifyAIOCB *acb = (BlkverifyAIOCB *)blockacb; |
42 | d9d33417 | Stefan Hajnoczi | bool finished = false; |
43 | d9d33417 | Stefan Hajnoczi | |
44 | d9d33417 | Stefan Hajnoczi | /* Wait until request completes, invokes its callback, and frees itself */
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45 | d9d33417 | Stefan Hajnoczi | acb->finished = &finished; |
46 | d9d33417 | Stefan Hajnoczi | while (!finished) {
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47 | d9d33417 | Stefan Hajnoczi | qemu_aio_wait(); |
48 | d9d33417 | Stefan Hajnoczi | } |
49 | d9d33417 | Stefan Hajnoczi | } |
50 | d9d33417 | Stefan Hajnoczi | |
51 | d7331bed | Stefan Hajnoczi | static const AIOCBInfo blkverify_aiocb_info = { |
52 | d9d33417 | Stefan Hajnoczi | .aiocb_size = sizeof(BlkverifyAIOCB),
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53 | d9d33417 | Stefan Hajnoczi | .cancel = blkverify_aio_cancel, |
54 | d9d33417 | Stefan Hajnoczi | }; |
55 | d9d33417 | Stefan Hajnoczi | |
56 | a77cffe7 | Stefan Weil | static void GCC_FMT_ATTR(2, 3) blkverify_err(BlkverifyAIOCB *acb, |
57 | a77cffe7 | Stefan Weil | const char *fmt, ...) |
58 | d9d33417 | Stefan Hajnoczi | { |
59 | d9d33417 | Stefan Hajnoczi | va_list ap; |
60 | d9d33417 | Stefan Hajnoczi | |
61 | d9d33417 | Stefan Hajnoczi | va_start(ap, fmt); |
62 | 687db4ed | Anthony Liguori | fprintf(stderr, "blkverify: %s sector_num=%" PRId64 " nb_sectors=%d ", |
63 | d9d33417 | Stefan Hajnoczi | acb->is_write ? "write" : "read", acb->sector_num, |
64 | d9d33417 | Stefan Hajnoczi | acb->nb_sectors); |
65 | d9d33417 | Stefan Hajnoczi | vfprintf(stderr, fmt, ap); |
66 | d9d33417 | Stefan Hajnoczi | fprintf(stderr, "\n");
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67 | d9d33417 | Stefan Hajnoczi | va_end(ap); |
68 | d9d33417 | Stefan Hajnoczi | exit(1);
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69 | d9d33417 | Stefan Hajnoczi | } |
70 | d9d33417 | Stefan Hajnoczi | |
71 | d9d33417 | Stefan Hajnoczi | /* Valid blkverify filenames look like blkverify:path/to/raw_image:path/to/image */
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72 | 16c79092 | Kevin Wolf | static void blkverify_parse_filename(const char *filename, QDict *options, |
73 | 16c79092 | Kevin Wolf | Error **errp) |
74 | d9d33417 | Stefan Hajnoczi | { |
75 | 16c79092 | Kevin Wolf | const char *c; |
76 | 16c79092 | Kevin Wolf | QString *raw_path; |
77 | 16c79092 | Kevin Wolf | |
78 | d9d33417 | Stefan Hajnoczi | |
79 | d9d33417 | Stefan Hajnoczi | /* Parse the blkverify: prefix */
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80 | 16c79092 | Kevin Wolf | if (!strstart(filename, "blkverify:", &filename)) { |
81 | 16c79092 | Kevin Wolf | error_setg(errp, "File name string must start with 'blkverify:'");
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82 | 16c79092 | Kevin Wolf | return;
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83 | d9d33417 | Stefan Hajnoczi | } |
84 | d9d33417 | Stefan Hajnoczi | |
85 | d9d33417 | Stefan Hajnoczi | /* Parse the raw image filename */
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86 | d9d33417 | Stefan Hajnoczi | c = strchr(filename, ':');
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87 | d9d33417 | Stefan Hajnoczi | if (c == NULL) { |
88 | 16c79092 | Kevin Wolf | error_setg(errp, "blkverify requires raw copy and original image path");
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89 | 16c79092 | Kevin Wolf | return;
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90 | 16c79092 | Kevin Wolf | } |
91 | 16c79092 | Kevin Wolf | |
92 | 16c79092 | Kevin Wolf | /* TODO Implement option pass-through and set raw.filename here */
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93 | 16c79092 | Kevin Wolf | raw_path = qstring_from_substr(filename, 0, c - filename - 1); |
94 | 16c79092 | Kevin Wolf | qdict_put(options, "x-raw", raw_path);
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95 | 16c79092 | Kevin Wolf | |
96 | 16c79092 | Kevin Wolf | /* TODO Allow multi-level nesting and set file.filename here */
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97 | 16c79092 | Kevin Wolf | filename = c + 1;
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98 | 16c79092 | Kevin Wolf | qdict_put(options, "x-image", qstring_from_str(filename));
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99 | 16c79092 | Kevin Wolf | } |
100 | 16c79092 | Kevin Wolf | |
101 | 16c79092 | Kevin Wolf | static QemuOptsList runtime_opts = {
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102 | 16c79092 | Kevin Wolf | .name = "blkverify",
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103 | 16c79092 | Kevin Wolf | .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head), |
104 | 16c79092 | Kevin Wolf | .desc = { |
105 | 16c79092 | Kevin Wolf | { |
106 | 16c79092 | Kevin Wolf | .name = "x-raw",
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107 | 16c79092 | Kevin Wolf | .type = QEMU_OPT_STRING, |
108 | 16c79092 | Kevin Wolf | .help = "[internal use only, will be removed]",
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109 | 16c79092 | Kevin Wolf | }, |
110 | 16c79092 | Kevin Wolf | { |
111 | 16c79092 | Kevin Wolf | .name = "x-image",
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112 | 16c79092 | Kevin Wolf | .type = QEMU_OPT_STRING, |
113 | 16c79092 | Kevin Wolf | .help = "[internal use only, will be removed]",
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114 | 16c79092 | Kevin Wolf | }, |
115 | 16c79092 | Kevin Wolf | { /* end of list */ }
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116 | 16c79092 | Kevin Wolf | }, |
117 | 16c79092 | Kevin Wolf | }; |
118 | 16c79092 | Kevin Wolf | |
119 | 015a1036 | Max Reitz | static int blkverify_open(BlockDriverState *bs, QDict *options, int flags, |
120 | 015a1036 | Max Reitz | Error **errp) |
121 | 16c79092 | Kevin Wolf | { |
122 | 16c79092 | Kevin Wolf | BDRVBlkverifyState *s = bs->opaque; |
123 | 16c79092 | Kevin Wolf | QemuOpts *opts; |
124 | 16c79092 | Kevin Wolf | Error *local_err = NULL;
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125 | 16c79092 | Kevin Wolf | const char *filename, *raw; |
126 | 16c79092 | Kevin Wolf | int ret;
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127 | 16c79092 | Kevin Wolf | |
128 | 16c79092 | Kevin Wolf | opts = qemu_opts_create_nofail(&runtime_opts); |
129 | 16c79092 | Kevin Wolf | qemu_opts_absorb_qdict(opts, options, &local_err); |
130 | 16c79092 | Kevin Wolf | if (error_is_set(&local_err)) {
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131 | 16c79092 | Kevin Wolf | qerror_report_err(local_err); |
132 | 16c79092 | Kevin Wolf | error_free(local_err); |
133 | 16c79092 | Kevin Wolf | ret = -EINVAL; |
134 | 16c79092 | Kevin Wolf | goto fail;
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135 | 16c79092 | Kevin Wolf | } |
136 | 16c79092 | Kevin Wolf | |
137 | 16c79092 | Kevin Wolf | /* Parse the raw image filename */
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138 | 16c79092 | Kevin Wolf | raw = qemu_opt_get(opts, "x-raw");
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139 | 16c79092 | Kevin Wolf | if (raw == NULL) { |
140 | 16c79092 | Kevin Wolf | ret = -EINVAL; |
141 | 16c79092 | Kevin Wolf | goto fail;
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142 | d9d33417 | Stefan Hajnoczi | } |
143 | d9d33417 | Stefan Hajnoczi | |
144 | 34b5d2c6 | Max Reitz | ret = bdrv_file_open(&bs->file, raw, NULL, flags, &local_err);
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145 | d9d33417 | Stefan Hajnoczi | if (ret < 0) { |
146 | 34b5d2c6 | Max Reitz | qerror_report_err(local_err); |
147 | 34b5d2c6 | Max Reitz | error_free(local_err); |
148 | 16c79092 | Kevin Wolf | goto fail;
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149 | d9d33417 | Stefan Hajnoczi | } |
150 | d9d33417 | Stefan Hajnoczi | |
151 | d9d33417 | Stefan Hajnoczi | /* Open the test file */
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152 | 16c79092 | Kevin Wolf | filename = qemu_opt_get(opts, "x-image");
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153 | 16c79092 | Kevin Wolf | if (filename == NULL) { |
154 | 16c79092 | Kevin Wolf | ret = -EINVAL; |
155 | 16c79092 | Kevin Wolf | goto fail;
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156 | 16c79092 | Kevin Wolf | } |
157 | 16c79092 | Kevin Wolf | |
158 | d9d33417 | Stefan Hajnoczi | s->test_file = bdrv_new("");
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159 | 34b5d2c6 | Max Reitz | ret = bdrv_open(s->test_file, filename, NULL, flags, NULL, &local_err); |
160 | d9d33417 | Stefan Hajnoczi | if (ret < 0) { |
161 | 34b5d2c6 | Max Reitz | qerror_report_err(local_err); |
162 | 34b5d2c6 | Max Reitz | error_free(local_err); |
163 | 4f6fd349 | Fam Zheng | bdrv_unref(s->test_file); |
164 | d9d33417 | Stefan Hajnoczi | s->test_file = NULL;
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165 | 16c79092 | Kevin Wolf | goto fail;
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166 | d9d33417 | Stefan Hajnoczi | } |
167 | d9d33417 | Stefan Hajnoczi | |
168 | 16c79092 | Kevin Wolf | ret = 0;
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169 | 16c79092 | Kevin Wolf | fail:
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170 | 16c79092 | Kevin Wolf | return ret;
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171 | d9d33417 | Stefan Hajnoczi | } |
172 | d9d33417 | Stefan Hajnoczi | |
173 | d9d33417 | Stefan Hajnoczi | static void blkverify_close(BlockDriverState *bs) |
174 | d9d33417 | Stefan Hajnoczi | { |
175 | d9d33417 | Stefan Hajnoczi | BDRVBlkverifyState *s = bs->opaque; |
176 | d9d33417 | Stefan Hajnoczi | |
177 | 4f6fd349 | Fam Zheng | bdrv_unref(s->test_file); |
178 | d9d33417 | Stefan Hajnoczi | s->test_file = NULL;
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179 | d9d33417 | Stefan Hajnoczi | } |
180 | d9d33417 | Stefan Hajnoczi | |
181 | d9d33417 | Stefan Hajnoczi | static int64_t blkverify_getlength(BlockDriverState *bs)
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182 | d9d33417 | Stefan Hajnoczi | { |
183 | d9d33417 | Stefan Hajnoczi | BDRVBlkverifyState *s = bs->opaque; |
184 | d9d33417 | Stefan Hajnoczi | |
185 | d9d33417 | Stefan Hajnoczi | return bdrv_getlength(s->test_file);
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186 | d9d33417 | Stefan Hajnoczi | } |
187 | d9d33417 | Stefan Hajnoczi | |
188 | d9d33417 | Stefan Hajnoczi | /**
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189 | d9d33417 | Stefan Hajnoczi | * Check that I/O vector contents are identical
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190 | d9d33417 | Stefan Hajnoczi | *
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191 | d9d33417 | Stefan Hajnoczi | * @a: I/O vector
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192 | d9d33417 | Stefan Hajnoczi | * @b: I/O vector
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193 | d9d33417 | Stefan Hajnoczi | * @ret: Offset to first mismatching byte or -1 if match
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194 | d9d33417 | Stefan Hajnoczi | */
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195 | d9d33417 | Stefan Hajnoczi | static ssize_t blkverify_iovec_compare(QEMUIOVector *a, QEMUIOVector *b)
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196 | d9d33417 | Stefan Hajnoczi | { |
197 | d9d33417 | Stefan Hajnoczi | int i;
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198 | d9d33417 | Stefan Hajnoczi | ssize_t offset = 0;
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199 | d9d33417 | Stefan Hajnoczi | |
200 | d9d33417 | Stefan Hajnoczi | assert(a->niov == b->niov); |
201 | d9d33417 | Stefan Hajnoczi | for (i = 0; i < a->niov; i++) { |
202 | d9d33417 | Stefan Hajnoczi | size_t len = 0;
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203 | d9d33417 | Stefan Hajnoczi | uint8_t *p = (uint8_t *)a->iov[i].iov_base; |
204 | d9d33417 | Stefan Hajnoczi | uint8_t *q = (uint8_t *)b->iov[i].iov_base; |
205 | d9d33417 | Stefan Hajnoczi | |
206 | d9d33417 | Stefan Hajnoczi | assert(a->iov[i].iov_len == b->iov[i].iov_len); |
207 | d9d33417 | Stefan Hajnoczi | while (len < a->iov[i].iov_len && *p++ == *q++) {
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208 | d9d33417 | Stefan Hajnoczi | len++; |
209 | d9d33417 | Stefan Hajnoczi | } |
210 | d9d33417 | Stefan Hajnoczi | |
211 | d9d33417 | Stefan Hajnoczi | offset += len; |
212 | d9d33417 | Stefan Hajnoczi | |
213 | d9d33417 | Stefan Hajnoczi | if (len != a->iov[i].iov_len) {
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214 | d9d33417 | Stefan Hajnoczi | return offset;
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215 | d9d33417 | Stefan Hajnoczi | } |
216 | d9d33417 | Stefan Hajnoczi | } |
217 | d9d33417 | Stefan Hajnoczi | return -1; |
218 | d9d33417 | Stefan Hajnoczi | } |
219 | d9d33417 | Stefan Hajnoczi | |
220 | d9d33417 | Stefan Hajnoczi | typedef struct { |
221 | d9d33417 | Stefan Hajnoczi | int src_index;
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222 | d9d33417 | Stefan Hajnoczi | struct iovec *src_iov;
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223 | d9d33417 | Stefan Hajnoczi | void *dest_base;
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224 | d9d33417 | Stefan Hajnoczi | } IOVectorSortElem; |
225 | d9d33417 | Stefan Hajnoczi | |
226 | d9d33417 | Stefan Hajnoczi | static int sortelem_cmp_src_base(const void *a, const void *b) |
227 | d9d33417 | Stefan Hajnoczi | { |
228 | d9d33417 | Stefan Hajnoczi | const IOVectorSortElem *elem_a = a;
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229 | d9d33417 | Stefan Hajnoczi | const IOVectorSortElem *elem_b = b;
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230 | d9d33417 | Stefan Hajnoczi | |
231 | d9d33417 | Stefan Hajnoczi | /* Don't overflow */
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232 | d9d33417 | Stefan Hajnoczi | if (elem_a->src_iov->iov_base < elem_b->src_iov->iov_base) {
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233 | d9d33417 | Stefan Hajnoczi | return -1; |
234 | d9d33417 | Stefan Hajnoczi | } else if (elem_a->src_iov->iov_base > elem_b->src_iov->iov_base) { |
235 | d9d33417 | Stefan Hajnoczi | return 1; |
236 | d9d33417 | Stefan Hajnoczi | } else {
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237 | d9d33417 | Stefan Hajnoczi | return 0; |
238 | d9d33417 | Stefan Hajnoczi | } |
239 | d9d33417 | Stefan Hajnoczi | } |
240 | d9d33417 | Stefan Hajnoczi | |
241 | d9d33417 | Stefan Hajnoczi | static int sortelem_cmp_src_index(const void *a, const void *b) |
242 | d9d33417 | Stefan Hajnoczi | { |
243 | d9d33417 | Stefan Hajnoczi | const IOVectorSortElem *elem_a = a;
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244 | d9d33417 | Stefan Hajnoczi | const IOVectorSortElem *elem_b = b;
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245 | d9d33417 | Stefan Hajnoczi | |
246 | d9d33417 | Stefan Hajnoczi | return elem_a->src_index - elem_b->src_index;
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247 | d9d33417 | Stefan Hajnoczi | } |
248 | d9d33417 | Stefan Hajnoczi | |
249 | d9d33417 | Stefan Hajnoczi | /**
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250 | d9d33417 | Stefan Hajnoczi | * Copy contents of I/O vector
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251 | d9d33417 | Stefan Hajnoczi | *
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252 | d9d33417 | Stefan Hajnoczi | * The relative relationships of overlapping iovecs are preserved. This is
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253 | d9d33417 | Stefan Hajnoczi | * necessary to ensure identical semantics in the cloned I/O vector.
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254 | d9d33417 | Stefan Hajnoczi | */
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255 | d9d33417 | Stefan Hajnoczi | static void blkverify_iovec_clone(QEMUIOVector *dest, const QEMUIOVector *src, |
256 | d9d33417 | Stefan Hajnoczi | void *buf)
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257 | d9d33417 | Stefan Hajnoczi | { |
258 | d9d33417 | Stefan Hajnoczi | IOVectorSortElem sortelems[src->niov]; |
259 | d9d33417 | Stefan Hajnoczi | void *last_end;
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260 | d9d33417 | Stefan Hajnoczi | int i;
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261 | d9d33417 | Stefan Hajnoczi | |
262 | d9d33417 | Stefan Hajnoczi | /* Sort by source iovecs by base address */
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263 | d9d33417 | Stefan Hajnoczi | for (i = 0; i < src->niov; i++) { |
264 | d9d33417 | Stefan Hajnoczi | sortelems[i].src_index = i; |
265 | d9d33417 | Stefan Hajnoczi | sortelems[i].src_iov = &src->iov[i]; |
266 | d9d33417 | Stefan Hajnoczi | } |
267 | d9d33417 | Stefan Hajnoczi | qsort(sortelems, src->niov, sizeof(sortelems[0]), sortelem_cmp_src_base); |
268 | d9d33417 | Stefan Hajnoczi | |
269 | d9d33417 | Stefan Hajnoczi | /* Allocate buffer space taking into account overlapping iovecs */
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270 | d9d33417 | Stefan Hajnoczi | last_end = NULL;
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271 | d9d33417 | Stefan Hajnoczi | for (i = 0; i < src->niov; i++) { |
272 | d9d33417 | Stefan Hajnoczi | struct iovec *cur = sortelems[i].src_iov;
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273 | d9d33417 | Stefan Hajnoczi | ptrdiff_t rewind = 0;
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274 | d9d33417 | Stefan Hajnoczi | |
275 | d9d33417 | Stefan Hajnoczi | /* Detect overlap */
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276 | d9d33417 | Stefan Hajnoczi | if (last_end && last_end > cur->iov_base) {
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277 | d9d33417 | Stefan Hajnoczi | rewind = last_end - cur->iov_base; |
278 | d9d33417 | Stefan Hajnoczi | } |
279 | d9d33417 | Stefan Hajnoczi | |
280 | d9d33417 | Stefan Hajnoczi | sortelems[i].dest_base = buf - rewind; |
281 | d9d33417 | Stefan Hajnoczi | buf += cur->iov_len - MIN(rewind, cur->iov_len); |
282 | d9d33417 | Stefan Hajnoczi | last_end = MAX(cur->iov_base + cur->iov_len, last_end); |
283 | d9d33417 | Stefan Hajnoczi | } |
284 | d9d33417 | Stefan Hajnoczi | |
285 | d9d33417 | Stefan Hajnoczi | /* Sort by source iovec index and build destination iovec */
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286 | d9d33417 | Stefan Hajnoczi | qsort(sortelems, src->niov, sizeof(sortelems[0]), sortelem_cmp_src_index); |
287 | d9d33417 | Stefan Hajnoczi | for (i = 0; i < src->niov; i++) { |
288 | d9d33417 | Stefan Hajnoczi | qemu_iovec_add(dest, sortelems[i].dest_base, src->iov[i].iov_len); |
289 | d9d33417 | Stefan Hajnoczi | } |
290 | d9d33417 | Stefan Hajnoczi | } |
291 | d9d33417 | Stefan Hajnoczi | |
292 | d9d33417 | Stefan Hajnoczi | static BlkverifyAIOCB *blkverify_aio_get(BlockDriverState *bs, bool is_write, |
293 | d9d33417 | Stefan Hajnoczi | int64_t sector_num, QEMUIOVector *qiov, |
294 | d9d33417 | Stefan Hajnoczi | int nb_sectors,
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295 | d9d33417 | Stefan Hajnoczi | BlockDriverCompletionFunc *cb, |
296 | d9d33417 | Stefan Hajnoczi | void *opaque)
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297 | d9d33417 | Stefan Hajnoczi | { |
298 | d7331bed | Stefan Hajnoczi | BlkverifyAIOCB *acb = qemu_aio_get(&blkverify_aiocb_info, bs, cb, opaque); |
299 | d9d33417 | Stefan Hajnoczi | |
300 | d9d33417 | Stefan Hajnoczi | acb->bh = NULL;
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301 | d9d33417 | Stefan Hajnoczi | acb->is_write = is_write; |
302 | d9d33417 | Stefan Hajnoczi | acb->sector_num = sector_num; |
303 | d9d33417 | Stefan Hajnoczi | acb->nb_sectors = nb_sectors; |
304 | d9d33417 | Stefan Hajnoczi | acb->ret = -EINPROGRESS; |
305 | d9d33417 | Stefan Hajnoczi | acb->done = 0;
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306 | d9d33417 | Stefan Hajnoczi | acb->qiov = qiov; |
307 | d9d33417 | Stefan Hajnoczi | acb->buf = NULL;
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308 | d9d33417 | Stefan Hajnoczi | acb->verify = NULL;
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309 | d9d33417 | Stefan Hajnoczi | acb->finished = NULL;
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310 | d9d33417 | Stefan Hajnoczi | return acb;
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311 | d9d33417 | Stefan Hajnoczi | } |
312 | d9d33417 | Stefan Hajnoczi | |
313 | d9d33417 | Stefan Hajnoczi | static void blkverify_aio_bh(void *opaque) |
314 | d9d33417 | Stefan Hajnoczi | { |
315 | d9d33417 | Stefan Hajnoczi | BlkverifyAIOCB *acb = opaque; |
316 | d9d33417 | Stefan Hajnoczi | |
317 | d9d33417 | Stefan Hajnoczi | qemu_bh_delete(acb->bh); |
318 | d9d33417 | Stefan Hajnoczi | if (acb->buf) {
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319 | d9d33417 | Stefan Hajnoczi | qemu_iovec_destroy(&acb->raw_qiov); |
320 | d9d33417 | Stefan Hajnoczi | qemu_vfree(acb->buf); |
321 | d9d33417 | Stefan Hajnoczi | } |
322 | d9d33417 | Stefan Hajnoczi | acb->common.cb(acb->common.opaque, acb->ret); |
323 | d9d33417 | Stefan Hajnoczi | if (acb->finished) {
|
324 | d9d33417 | Stefan Hajnoczi | *acb->finished = true;
|
325 | d9d33417 | Stefan Hajnoczi | } |
326 | d9d33417 | Stefan Hajnoczi | qemu_aio_release(acb); |
327 | d9d33417 | Stefan Hajnoczi | } |
328 | d9d33417 | Stefan Hajnoczi | |
329 | d9d33417 | Stefan Hajnoczi | static void blkverify_aio_cb(void *opaque, int ret) |
330 | d9d33417 | Stefan Hajnoczi | { |
331 | d9d33417 | Stefan Hajnoczi | BlkverifyAIOCB *acb = opaque; |
332 | d9d33417 | Stefan Hajnoczi | |
333 | d9d33417 | Stefan Hajnoczi | switch (++acb->done) {
|
334 | d9d33417 | Stefan Hajnoczi | case 1: |
335 | d9d33417 | Stefan Hajnoczi | acb->ret = ret; |
336 | d9d33417 | Stefan Hajnoczi | break;
|
337 | d9d33417 | Stefan Hajnoczi | |
338 | d9d33417 | Stefan Hajnoczi | case 2: |
339 | d9d33417 | Stefan Hajnoczi | if (acb->ret != ret) {
|
340 | d9d33417 | Stefan Hajnoczi | blkverify_err(acb, "return value mismatch %d != %d", acb->ret, ret);
|
341 | d9d33417 | Stefan Hajnoczi | } |
342 | d9d33417 | Stefan Hajnoczi | |
343 | d9d33417 | Stefan Hajnoczi | if (acb->verify) {
|
344 | d9d33417 | Stefan Hajnoczi | acb->verify(acb); |
345 | d9d33417 | Stefan Hajnoczi | } |
346 | d9d33417 | Stefan Hajnoczi | |
347 | d9d33417 | Stefan Hajnoczi | acb->bh = qemu_bh_new(blkverify_aio_bh, acb); |
348 | d9d33417 | Stefan Hajnoczi | qemu_bh_schedule(acb->bh); |
349 | d9d33417 | Stefan Hajnoczi | break;
|
350 | d9d33417 | Stefan Hajnoczi | } |
351 | d9d33417 | Stefan Hajnoczi | } |
352 | d9d33417 | Stefan Hajnoczi | |
353 | d9d33417 | Stefan Hajnoczi | static void blkverify_verify_readv(BlkverifyAIOCB *acb) |
354 | d9d33417 | Stefan Hajnoczi | { |
355 | d9d33417 | Stefan Hajnoczi | ssize_t offset = blkverify_iovec_compare(acb->qiov, &acb->raw_qiov); |
356 | d9d33417 | Stefan Hajnoczi | if (offset != -1) { |
357 | a3133586 | Blue Swirl | blkverify_err(acb, "contents mismatch in sector %" PRId64,
|
358 | a3133586 | Blue Swirl | acb->sector_num + (int64_t)(offset / BDRV_SECTOR_SIZE)); |
359 | d9d33417 | Stefan Hajnoczi | } |
360 | d9d33417 | Stefan Hajnoczi | } |
361 | d9d33417 | Stefan Hajnoczi | |
362 | d9d33417 | Stefan Hajnoczi | static BlockDriverAIOCB *blkverify_aio_readv(BlockDriverState *bs,
|
363 | d9d33417 | Stefan Hajnoczi | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
364 | d9d33417 | Stefan Hajnoczi | BlockDriverCompletionFunc *cb, void *opaque)
|
365 | d9d33417 | Stefan Hajnoczi | { |
366 | d9d33417 | Stefan Hajnoczi | BDRVBlkverifyState *s = bs->opaque; |
367 | d9d33417 | Stefan Hajnoczi | BlkverifyAIOCB *acb = blkverify_aio_get(bs, false, sector_num, qiov,
|
368 | d9d33417 | Stefan Hajnoczi | nb_sectors, cb, opaque); |
369 | d9d33417 | Stefan Hajnoczi | |
370 | d9d33417 | Stefan Hajnoczi | acb->verify = blkverify_verify_readv; |
371 | d9d33417 | Stefan Hajnoczi | acb->buf = qemu_blockalign(bs->file, qiov->size); |
372 | d9d33417 | Stefan Hajnoczi | qemu_iovec_init(&acb->raw_qiov, acb->qiov->niov); |
373 | d9d33417 | Stefan Hajnoczi | blkverify_iovec_clone(&acb->raw_qiov, qiov, acb->buf); |
374 | d9d33417 | Stefan Hajnoczi | |
375 | ad54ae80 | Paolo Bonzini | bdrv_aio_readv(s->test_file, sector_num, qiov, nb_sectors, |
376 | ad54ae80 | Paolo Bonzini | blkverify_aio_cb, acb); |
377 | ad54ae80 | Paolo Bonzini | bdrv_aio_readv(bs->file, sector_num, &acb->raw_qiov, nb_sectors, |
378 | ad54ae80 | Paolo Bonzini | blkverify_aio_cb, acb); |
379 | d9d33417 | Stefan Hajnoczi | return &acb->common;
|
380 | d9d33417 | Stefan Hajnoczi | } |
381 | d9d33417 | Stefan Hajnoczi | |
382 | d9d33417 | Stefan Hajnoczi | static BlockDriverAIOCB *blkverify_aio_writev(BlockDriverState *bs,
|
383 | d9d33417 | Stefan Hajnoczi | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
384 | d9d33417 | Stefan Hajnoczi | BlockDriverCompletionFunc *cb, void *opaque)
|
385 | d9d33417 | Stefan Hajnoczi | { |
386 | d9d33417 | Stefan Hajnoczi | BDRVBlkverifyState *s = bs->opaque; |
387 | d9d33417 | Stefan Hajnoczi | BlkverifyAIOCB *acb = blkverify_aio_get(bs, true, sector_num, qiov,
|
388 | d9d33417 | Stefan Hajnoczi | nb_sectors, cb, opaque); |
389 | d9d33417 | Stefan Hajnoczi | |
390 | ad54ae80 | Paolo Bonzini | bdrv_aio_writev(s->test_file, sector_num, qiov, nb_sectors, |
391 | ad54ae80 | Paolo Bonzini | blkverify_aio_cb, acb); |
392 | ad54ae80 | Paolo Bonzini | bdrv_aio_writev(bs->file, sector_num, qiov, nb_sectors, |
393 | ad54ae80 | Paolo Bonzini | blkverify_aio_cb, acb); |
394 | d9d33417 | Stefan Hajnoczi | return &acb->common;
|
395 | d9d33417 | Stefan Hajnoczi | } |
396 | d9d33417 | Stefan Hajnoczi | |
397 | d9d33417 | Stefan Hajnoczi | static BlockDriverAIOCB *blkverify_aio_flush(BlockDriverState *bs,
|
398 | d9d33417 | Stefan Hajnoczi | BlockDriverCompletionFunc *cb, |
399 | d9d33417 | Stefan Hajnoczi | void *opaque)
|
400 | d9d33417 | Stefan Hajnoczi | { |
401 | d9d33417 | Stefan Hajnoczi | BDRVBlkverifyState *s = bs->opaque; |
402 | d9d33417 | Stefan Hajnoczi | |
403 | d9d33417 | Stefan Hajnoczi | /* Only flush test file, the raw file is not important */
|
404 | d9d33417 | Stefan Hajnoczi | return bdrv_aio_flush(s->test_file, cb, opaque);
|
405 | d9d33417 | Stefan Hajnoczi | } |
406 | d9d33417 | Stefan Hajnoczi | |
407 | d9d33417 | Stefan Hajnoczi | static BlockDriver bdrv_blkverify = {
|
408 | 16c79092 | Kevin Wolf | .format_name = "blkverify",
|
409 | 16c79092 | Kevin Wolf | .protocol_name = "blkverify",
|
410 | 16c79092 | Kevin Wolf | .instance_size = sizeof(BDRVBlkverifyState),
|
411 | 16c79092 | Kevin Wolf | |
412 | 16c79092 | Kevin Wolf | .bdrv_parse_filename = blkverify_parse_filename, |
413 | 16c79092 | Kevin Wolf | .bdrv_file_open = blkverify_open, |
414 | 16c79092 | Kevin Wolf | .bdrv_close = blkverify_close, |
415 | 16c79092 | Kevin Wolf | .bdrv_getlength = blkverify_getlength, |
416 | 16c79092 | Kevin Wolf | |
417 | 16c79092 | Kevin Wolf | .bdrv_aio_readv = blkverify_aio_readv, |
418 | 16c79092 | Kevin Wolf | .bdrv_aio_writev = blkverify_aio_writev, |
419 | 16c79092 | Kevin Wolf | .bdrv_aio_flush = blkverify_aio_flush, |
420 | d9d33417 | Stefan Hajnoczi | }; |
421 | d9d33417 | Stefan Hajnoczi | |
422 | d9d33417 | Stefan Hajnoczi | static void bdrv_blkverify_init(void) |
423 | d9d33417 | Stefan Hajnoczi | { |
424 | d9d33417 | Stefan Hajnoczi | bdrv_register(&bdrv_blkverify); |
425 | d9d33417 | Stefan Hajnoczi | } |
426 | d9d33417 | Stefan Hajnoczi | |
427 | d9d33417 | Stefan Hajnoczi | block_init(bdrv_blkverify_init); |