root / block / raw.c @ c6df7102
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1 | 84a12e66 | Christoph Hellwig | |
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2 | 84a12e66 | Christoph Hellwig | #include "qemu-common.h" |
3 | 84a12e66 | Christoph Hellwig | #include "block_int.h" |
4 | 84a12e66 | Christoph Hellwig | #include "module.h" |
5 | 84a12e66 | Christoph Hellwig | |
6 | 66f82cee | Kevin Wolf | static int raw_open(BlockDriverState *bs, int flags) |
7 | 84a12e66 | Christoph Hellwig | { |
8 | 66f82cee | Kevin Wolf | bs->sg = bs->file->sg; |
9 | 66f82cee | Kevin Wolf | return 0; |
10 | 84a12e66 | Christoph Hellwig | } |
11 | 84a12e66 | Christoph Hellwig | |
12 | 84a12e66 | Christoph Hellwig | static int raw_read(BlockDriverState *bs, int64_t sector_num, |
13 | 84a12e66 | Christoph Hellwig | uint8_t *buf, int nb_sectors)
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14 | 84a12e66 | Christoph Hellwig | { |
15 | 66f82cee | Kevin Wolf | return bdrv_read(bs->file, sector_num, buf, nb_sectors);
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16 | 84a12e66 | Christoph Hellwig | } |
17 | 84a12e66 | Christoph Hellwig | |
18 | 84a12e66 | Christoph Hellwig | static int raw_write(BlockDriverState *bs, int64_t sector_num, |
19 | 84a12e66 | Christoph Hellwig | const uint8_t *buf, int nb_sectors) |
20 | 84a12e66 | Christoph Hellwig | { |
21 | 66f82cee | Kevin Wolf | return bdrv_write(bs->file, sector_num, buf, nb_sectors);
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22 | 84a12e66 | Christoph Hellwig | } |
23 | 84a12e66 | Christoph Hellwig | |
24 | 84a12e66 | Christoph Hellwig | static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs,
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25 | 84a12e66 | Christoph Hellwig | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
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26 | 84a12e66 | Christoph Hellwig | BlockDriverCompletionFunc *cb, void *opaque)
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27 | 84a12e66 | Christoph Hellwig | { |
28 | 66f82cee | Kevin Wolf | return bdrv_aio_readv(bs->file, sector_num, qiov, nb_sectors, cb, opaque);
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29 | 84a12e66 | Christoph Hellwig | } |
30 | 84a12e66 | Christoph Hellwig | |
31 | 84a12e66 | Christoph Hellwig | static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs,
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32 | 84a12e66 | Christoph Hellwig | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
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33 | 84a12e66 | Christoph Hellwig | BlockDriverCompletionFunc *cb, void *opaque)
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34 | 84a12e66 | Christoph Hellwig | { |
35 | 66f82cee | Kevin Wolf | return bdrv_aio_writev(bs->file, sector_num, qiov, nb_sectors, cb, opaque);
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36 | 84a12e66 | Christoph Hellwig | } |
37 | 84a12e66 | Christoph Hellwig | |
38 | 84a12e66 | Christoph Hellwig | static void raw_close(BlockDriverState *bs) |
39 | 84a12e66 | Christoph Hellwig | { |
40 | 84a12e66 | Christoph Hellwig | } |
41 | 84a12e66 | Christoph Hellwig | |
42 | 205ef796 | Kevin Wolf | static int raw_flush(BlockDriverState *bs) |
43 | 84a12e66 | Christoph Hellwig | { |
44 | 205ef796 | Kevin Wolf | return bdrv_flush(bs->file);
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45 | 84a12e66 | Christoph Hellwig | } |
46 | 84a12e66 | Christoph Hellwig | |
47 | 84a12e66 | Christoph Hellwig | static BlockDriverAIOCB *raw_aio_flush(BlockDriverState *bs,
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48 | 84a12e66 | Christoph Hellwig | BlockDriverCompletionFunc *cb, void *opaque)
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49 | 84a12e66 | Christoph Hellwig | { |
50 | 66f82cee | Kevin Wolf | return bdrv_aio_flush(bs->file, cb, opaque);
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51 | 84a12e66 | Christoph Hellwig | } |
52 | 84a12e66 | Christoph Hellwig | |
53 | 84a12e66 | Christoph Hellwig | static int64_t raw_getlength(BlockDriverState *bs)
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54 | 84a12e66 | Christoph Hellwig | { |
55 | 66f82cee | Kevin Wolf | return bdrv_getlength(bs->file);
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56 | 84a12e66 | Christoph Hellwig | } |
57 | 84a12e66 | Christoph Hellwig | |
58 | 84a12e66 | Christoph Hellwig | static int raw_truncate(BlockDriverState *bs, int64_t offset) |
59 | 84a12e66 | Christoph Hellwig | { |
60 | 66f82cee | Kevin Wolf | return bdrv_truncate(bs->file, offset);
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61 | 84a12e66 | Christoph Hellwig | } |
62 | 84a12e66 | Christoph Hellwig | |
63 | 84a12e66 | Christoph Hellwig | static int raw_probe(const uint8_t *buf, int buf_size, const char *filename) |
64 | 84a12e66 | Christoph Hellwig | { |
65 | 84a12e66 | Christoph Hellwig | return 1; /* everything can be opened as raw image */ |
66 | 84a12e66 | Christoph Hellwig | } |
67 | 84a12e66 | Christoph Hellwig | |
68 | bb8bf76f | Christoph Hellwig | static int raw_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors) |
69 | bb8bf76f | Christoph Hellwig | { |
70 | bb8bf76f | Christoph Hellwig | return bdrv_discard(bs->file, sector_num, nb_sectors);
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71 | bb8bf76f | Christoph Hellwig | } |
72 | bb8bf76f | Christoph Hellwig | |
73 | 84a12e66 | Christoph Hellwig | static int raw_is_inserted(BlockDriverState *bs) |
74 | 84a12e66 | Christoph Hellwig | { |
75 | 66f82cee | Kevin Wolf | return bdrv_is_inserted(bs->file);
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76 | 84a12e66 | Christoph Hellwig | } |
77 | 84a12e66 | Christoph Hellwig | |
78 | 84a12e66 | Christoph Hellwig | static int raw_eject(BlockDriverState *bs, int eject_flag) |
79 | 84a12e66 | Christoph Hellwig | { |
80 | 66f82cee | Kevin Wolf | return bdrv_eject(bs->file, eject_flag);
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81 | 84a12e66 | Christoph Hellwig | } |
82 | 84a12e66 | Christoph Hellwig | |
83 | 84a12e66 | Christoph Hellwig | static int raw_set_locked(BlockDriverState *bs, int locked) |
84 | 84a12e66 | Christoph Hellwig | { |
85 | 66f82cee | Kevin Wolf | bdrv_set_locked(bs->file, locked); |
86 | 84a12e66 | Christoph Hellwig | return 0; |
87 | 84a12e66 | Christoph Hellwig | } |
88 | 84a12e66 | Christoph Hellwig | |
89 | 84a12e66 | Christoph Hellwig | static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
90 | 84a12e66 | Christoph Hellwig | { |
91 | 66f82cee | Kevin Wolf | return bdrv_ioctl(bs->file, req, buf);
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92 | 84a12e66 | Christoph Hellwig | } |
93 | 84a12e66 | Christoph Hellwig | |
94 | 84a12e66 | Christoph Hellwig | static BlockDriverAIOCB *raw_aio_ioctl(BlockDriverState *bs,
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95 | 84a12e66 | Christoph Hellwig | unsigned long int req, void *buf, |
96 | 84a12e66 | Christoph Hellwig | BlockDriverCompletionFunc *cb, void *opaque)
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97 | 84a12e66 | Christoph Hellwig | { |
98 | 66f82cee | Kevin Wolf | return bdrv_aio_ioctl(bs->file, req, buf, cb, opaque);
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99 | 84a12e66 | Christoph Hellwig | } |
100 | 84a12e66 | Christoph Hellwig | |
101 | 84a12e66 | Christoph Hellwig | static int raw_create(const char *filename, QEMUOptionParameter *options) |
102 | 84a12e66 | Christoph Hellwig | { |
103 | 84a12e66 | Christoph Hellwig | return bdrv_create_file(filename, options);
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104 | 84a12e66 | Christoph Hellwig | } |
105 | 84a12e66 | Christoph Hellwig | |
106 | 84a12e66 | Christoph Hellwig | static QEMUOptionParameter raw_create_options[] = {
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107 | 84a12e66 | Christoph Hellwig | { |
108 | 84a12e66 | Christoph Hellwig | .name = BLOCK_OPT_SIZE, |
109 | 84a12e66 | Christoph Hellwig | .type = OPT_SIZE, |
110 | 84a12e66 | Christoph Hellwig | .help = "Virtual disk size"
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111 | 84a12e66 | Christoph Hellwig | }, |
112 | 84a12e66 | Christoph Hellwig | { NULL }
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113 | 84a12e66 | Christoph Hellwig | }; |
114 | 84a12e66 | Christoph Hellwig | |
115 | 336c1c12 | Kevin Wolf | static int raw_has_zero_init(BlockDriverState *bs) |
116 | 336c1c12 | Kevin Wolf | { |
117 | 336c1c12 | Kevin Wolf | return bdrv_has_zero_init(bs->file);
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118 | 336c1c12 | Kevin Wolf | } |
119 | 336c1c12 | Kevin Wolf | |
120 | 84a12e66 | Christoph Hellwig | static BlockDriver bdrv_raw = {
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121 | 84a12e66 | Christoph Hellwig | .format_name = "raw",
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122 | 84a12e66 | Christoph Hellwig | |
123 | 66f82cee | Kevin Wolf | /* It's really 0, but we need to make qemu_malloc() happy */
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124 | 66f82cee | Kevin Wolf | .instance_size = 1,
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125 | 84a12e66 | Christoph Hellwig | |
126 | 84a12e66 | Christoph Hellwig | .bdrv_open = raw_open, |
127 | 84a12e66 | Christoph Hellwig | .bdrv_close = raw_close, |
128 | 84a12e66 | Christoph Hellwig | .bdrv_read = raw_read, |
129 | 84a12e66 | Christoph Hellwig | .bdrv_write = raw_write, |
130 | 84a12e66 | Christoph Hellwig | .bdrv_flush = raw_flush, |
131 | 84a12e66 | Christoph Hellwig | .bdrv_probe = raw_probe, |
132 | 84a12e66 | Christoph Hellwig | .bdrv_getlength = raw_getlength, |
133 | 84a12e66 | Christoph Hellwig | .bdrv_truncate = raw_truncate, |
134 | 84a12e66 | Christoph Hellwig | |
135 | 84a12e66 | Christoph Hellwig | .bdrv_aio_readv = raw_aio_readv, |
136 | 84a12e66 | Christoph Hellwig | .bdrv_aio_writev = raw_aio_writev, |
137 | 84a12e66 | Christoph Hellwig | .bdrv_aio_flush = raw_aio_flush, |
138 | bb8bf76f | Christoph Hellwig | .bdrv_discard = raw_discard, |
139 | 84a12e66 | Christoph Hellwig | |
140 | 84a12e66 | Christoph Hellwig | .bdrv_is_inserted = raw_is_inserted, |
141 | 84a12e66 | Christoph Hellwig | .bdrv_eject = raw_eject, |
142 | 84a12e66 | Christoph Hellwig | .bdrv_set_locked = raw_set_locked, |
143 | 84a12e66 | Christoph Hellwig | .bdrv_ioctl = raw_ioctl, |
144 | 84a12e66 | Christoph Hellwig | .bdrv_aio_ioctl = raw_aio_ioctl, |
145 | 84a12e66 | Christoph Hellwig | |
146 | 84a12e66 | Christoph Hellwig | .bdrv_create = raw_create, |
147 | 84a12e66 | Christoph Hellwig | .create_options = raw_create_options, |
148 | 336c1c12 | Kevin Wolf | .bdrv_has_zero_init = raw_has_zero_init, |
149 | 84a12e66 | Christoph Hellwig | }; |
150 | 84a12e66 | Christoph Hellwig | |
151 | 84a12e66 | Christoph Hellwig | static void bdrv_raw_init(void) |
152 | 84a12e66 | Christoph Hellwig | { |
153 | 84a12e66 | Christoph Hellwig | bdrv_register(&bdrv_raw); |
154 | 84a12e66 | Christoph Hellwig | } |
155 | 84a12e66 | Christoph Hellwig | |
156 | 84a12e66 | Christoph Hellwig | block_init(bdrv_raw_init); |