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1 | 83f64091 | bellard | /*
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2 | 223d4670 | ths | * Block driver for RAW files (posix)
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3 | 5fafdf24 | ths | *
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4 | 83f64091 | bellard | * Copyright (c) 2006 Fabrice Bellard
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5 | 5fafdf24 | ths | *
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6 | 83f64091 | bellard | * Permission is hereby granted, free of charge, to any person obtaining a copy
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7 | 83f64091 | bellard | * of this software and associated documentation files (the "Software"), to deal
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8 | 83f64091 | bellard | * in the Software without restriction, including without limitation the rights
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9 | 83f64091 | bellard | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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10 | 83f64091 | bellard | * copies of the Software, and to permit persons to whom the Software is
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11 | 83f64091 | bellard | * furnished to do so, subject to the following conditions:
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12 | 83f64091 | bellard | *
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13 | 83f64091 | bellard | * The above copyright notice and this permission notice shall be included in
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14 | 83f64091 | bellard | * all copies or substantial portions of the Software.
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15 | 83f64091 | bellard | *
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16 | 83f64091 | bellard | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 | 83f64091 | bellard | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 | 83f64091 | bellard | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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19 | 83f64091 | bellard | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 | 83f64091 | bellard | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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21 | 83f64091 | bellard | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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22 | 83f64091 | bellard | * THE SOFTWARE.
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23 | 83f64091 | bellard | */
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24 | faf07963 | pbrook | #include "qemu-common.h" |
25 | 87ecb68b | pbrook | #include "qemu-timer.h" |
26 | baf35cb9 | aliguori | #include "qemu-char.h" |
27 | 83f64091 | bellard | #include "block_int.h" |
28 | 83f64091 | bellard | #include <assert.h> |
29 | 414f0dab | blueswir1 | #ifdef CONFIG_AIO
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30 | 83f64091 | bellard | #include <aio.h> |
31 | 414f0dab | blueswir1 | #endif
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32 | 83f64091 | bellard | |
33 | 83f64091 | bellard | #ifdef CONFIG_COCOA
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34 | 83f64091 | bellard | #include <paths.h> |
35 | 83f64091 | bellard | #include <sys/param.h> |
36 | 83f64091 | bellard | #include <IOKit/IOKitLib.h> |
37 | 83f64091 | bellard | #include <IOKit/IOBSD.h> |
38 | 83f64091 | bellard | #include <IOKit/storage/IOMediaBSDClient.h> |
39 | 83f64091 | bellard | #include <IOKit/storage/IOMedia.h> |
40 | 83f64091 | bellard | #include <IOKit/storage/IOCDMedia.h> |
41 | 83f64091 | bellard | //#include <IOKit/storage/IOCDTypes.h>
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42 | 83f64091 | bellard | #include <CoreFoundation/CoreFoundation.h> |
43 | 83f64091 | bellard | #endif
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44 | 83f64091 | bellard | |
45 | 83f64091 | bellard | #ifdef __sun__
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46 | 2e9671da | ths | #define _POSIX_PTHREAD_SEMANTICS 1 |
47 | 2e9671da | ths | #include <signal.h> |
48 | 83f64091 | bellard | #include <sys/dkio.h> |
49 | 83f64091 | bellard | #endif
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50 | 19cb3738 | bellard | #ifdef __linux__
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51 | 19cb3738 | bellard | #include <sys/ioctl.h> |
52 | 19cb3738 | bellard | #include <linux/cdrom.h> |
53 | 19cb3738 | bellard | #include <linux/fd.h> |
54 | 19cb3738 | bellard | #endif
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55 | 1cb6c3fd | ths | #ifdef __FreeBSD__
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56 | 543952ca | blueswir1 | #include <signal.h> |
57 | 1cb6c3fd | ths | #include <sys/disk.h> |
58 | 1cb6c3fd | ths | #endif
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59 | 83f64091 | bellard | |
60 | 128ab2ff | blueswir1 | #ifdef __OpenBSD__
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61 | 128ab2ff | blueswir1 | #include <sys/ioctl.h> |
62 | 128ab2ff | blueswir1 | #include <sys/disklabel.h> |
63 | 128ab2ff | blueswir1 | #include <sys/dkio.h> |
64 | 128ab2ff | blueswir1 | #endif
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65 | 128ab2ff | blueswir1 | |
66 | 19cb3738 | bellard | //#define DEBUG_FLOPPY
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67 | 83f64091 | bellard | |
68 | faf07963 | pbrook | //#define DEBUG_BLOCK
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69 | 03ff3ca3 | aliguori | #if defined(DEBUG_BLOCK)
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70 | a50a6282 | balrog | #define DEBUG_BLOCK_PRINT(formatCstr, args...) do { if (loglevel != 0) \ |
71 | 2e03286b | balrog | { fprintf(logfile, formatCstr, ##args); fflush(logfile); } } while (0) |
72 | 8c05dbf9 | ths | #else
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73 | 8c05dbf9 | ths | #define DEBUG_BLOCK_PRINT(formatCstr, args...)
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74 | 8c05dbf9 | ths | #endif
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75 | 8c05dbf9 | ths | |
76 | f6465578 | aliguori | /* OS X does not have O_DSYNC */
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77 | f6465578 | aliguori | #ifndef O_DSYNC
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78 | 7ab064d2 | aliguori | #define O_DSYNC O_SYNC
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79 | f6465578 | aliguori | #endif
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80 | f6465578 | aliguori | |
81 | 9f7965c7 | aliguori | /* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */
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82 | 9f7965c7 | aliguori | #ifndef O_DIRECT
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83 | 9f7965c7 | aliguori | #define O_DIRECT O_DSYNC
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84 | 9f7965c7 | aliguori | #endif
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85 | 9f7965c7 | aliguori | |
86 | 19cb3738 | bellard | #define FTYPE_FILE 0 |
87 | 19cb3738 | bellard | #define FTYPE_CD 1 |
88 | 19cb3738 | bellard | #define FTYPE_FD 2 |
89 | 83f64091 | bellard | |
90 | bed5cc52 | bellard | #define ALIGNED_BUFFER_SIZE (32 * 512) |
91 | bed5cc52 | bellard | |
92 | 19cb3738 | bellard | /* if the FD is not accessed during that time (in ms), we try to
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93 | 19cb3738 | bellard | reopen it to see if the disk has been changed */
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94 | 19cb3738 | bellard | #define FD_OPEN_TIMEOUT 1000 |
95 | 83f64091 | bellard | |
96 | 53538725 | aliguori | /* posix-aio doesn't allow multiple outstanding requests to a single file
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97 | 53538725 | aliguori | * descriptor. we implement a pool of dup()'d file descriptors to work
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98 | 53538725 | aliguori | * around this */
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99 | 53538725 | aliguori | #define RAW_FD_POOL_SIZE 64 |
100 | 53538725 | aliguori | |
101 | 19cb3738 | bellard | typedef struct BDRVRawState { |
102 | 19cb3738 | bellard | int fd;
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103 | 19cb3738 | bellard | int type;
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104 | 8c05dbf9 | ths | unsigned int lseek_err_cnt; |
105 | 53538725 | aliguori | int fd_pool[RAW_FD_POOL_SIZE];
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106 | 19cb3738 | bellard | #if defined(__linux__)
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107 | 19cb3738 | bellard | /* linux floppy specific */
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108 | 6dd2db52 | blueswir1 | int fd_open_flags;
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109 | 19cb3738 | bellard | int64_t fd_open_time; |
110 | 19cb3738 | bellard | int64_t fd_error_time; |
111 | 19cb3738 | bellard | int fd_got_error;
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112 | 19cb3738 | bellard | int fd_media_changed;
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113 | 83f64091 | bellard | #endif
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114 | bed5cc52 | bellard | uint8_t* aligned_buf; |
115 | 19cb3738 | bellard | } BDRVRawState; |
116 | 19cb3738 | bellard | |
117 | a76bab49 | aliguori | static int posix_aio_init(void); |
118 | a76bab49 | aliguori | |
119 | 19cb3738 | bellard | static int fd_open(BlockDriverState *bs); |
120 | 83f64091 | bellard | |
121 | 83f64091 | bellard | static int raw_open(BlockDriverState *bs, const char *filename, int flags) |
122 | 83f64091 | bellard | { |
123 | 83f64091 | bellard | BDRVRawState *s = bs->opaque; |
124 | 19cb3738 | bellard | int fd, open_flags, ret;
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125 | 53538725 | aliguori | int i;
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126 | 83f64091 | bellard | |
127 | a76bab49 | aliguori | posix_aio_init(); |
128 | a76bab49 | aliguori | |
129 | 8c05dbf9 | ths | s->lseek_err_cnt = 0;
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130 | 8c05dbf9 | ths | |
131 | 83f64091 | bellard | open_flags = O_BINARY; |
132 | 83f64091 | bellard | if ((flags & BDRV_O_ACCESS) == O_RDWR) {
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133 | 83f64091 | bellard | open_flags |= O_RDWR; |
134 | 83f64091 | bellard | } else {
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135 | 83f64091 | bellard | open_flags |= O_RDONLY; |
136 | 83f64091 | bellard | bs->read_only = 1;
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137 | 83f64091 | bellard | } |
138 | 83f64091 | bellard | if (flags & BDRV_O_CREAT)
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139 | 83f64091 | bellard | open_flags |= O_CREAT | O_TRUNC; |
140 | 9f7965c7 | aliguori | |
141 | 9f7965c7 | aliguori | /* Use O_DSYNC for write-through caching, no flags for write-back caching,
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142 | 9f7965c7 | aliguori | * and O_DIRECT for no caching. */
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143 | 9f7965c7 | aliguori | if ((flags & BDRV_O_NOCACHE))
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144 | 33f00271 | balrog | open_flags |= O_DIRECT; |
145 | 9f7965c7 | aliguori | else if (!(flags & BDRV_O_CACHE_WB)) |
146 | 9f7965c7 | aliguori | open_flags |= O_DSYNC; |
147 | 83f64091 | bellard | |
148 | 19cb3738 | bellard | s->type = FTYPE_FILE; |
149 | 19cb3738 | bellard | |
150 | 83f64091 | bellard | fd = open(filename, open_flags, 0644);
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151 | 19cb3738 | bellard | if (fd < 0) { |
152 | 19cb3738 | bellard | ret = -errno; |
153 | 19cb3738 | bellard | if (ret == -EROFS)
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154 | 19cb3738 | bellard | ret = -EACCES; |
155 | 19cb3738 | bellard | return ret;
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156 | 19cb3738 | bellard | } |
157 | 83f64091 | bellard | s->fd = fd; |
158 | 53538725 | aliguori | for (i = 0; i < RAW_FD_POOL_SIZE; i++) |
159 | 53538725 | aliguori | s->fd_pool[i] = -1;
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160 | bed5cc52 | bellard | s->aligned_buf = NULL;
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161 | 9f7965c7 | aliguori | if ((flags & BDRV_O_NOCACHE)) {
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162 | bed5cc52 | bellard | s->aligned_buf = qemu_memalign(512, ALIGNED_BUFFER_SIZE);
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163 | bed5cc52 | bellard | if (s->aligned_buf == NULL) { |
164 | bed5cc52 | bellard | ret = -errno; |
165 | bed5cc52 | bellard | close(fd); |
166 | bed5cc52 | bellard | return ret;
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167 | bed5cc52 | bellard | } |
168 | bed5cc52 | bellard | } |
169 | 83f64091 | bellard | return 0; |
170 | 83f64091 | bellard | } |
171 | 83f64091 | bellard | |
172 | 83f64091 | bellard | /* XXX: use host sector size if necessary with:
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173 | 83f64091 | bellard | #ifdef DIOCGSECTORSIZE
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174 | 83f64091 | bellard | {
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175 | 83f64091 | bellard | unsigned int sectorsize = 512;
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176 | 83f64091 | bellard | if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) &&
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177 | 83f64091 | bellard | sectorsize > bufsize)
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178 | 83f64091 | bellard | bufsize = sectorsize;
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179 | 83f64091 | bellard | }
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180 | 83f64091 | bellard | #endif
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181 | 83f64091 | bellard | #ifdef CONFIG_COCOA
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182 | 83f64091 | bellard | u_int32_t blockSize = 512;
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183 | 83f64091 | bellard | if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
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184 | 83f64091 | bellard | bufsize = blockSize;
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185 | 83f64091 | bellard | }
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186 | 83f64091 | bellard | #endif
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187 | 83f64091 | bellard | */
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188 | 83f64091 | bellard | |
189 | bed5cc52 | bellard | /*
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190 | bed5cc52 | bellard | * offset and count are in bytes, but must be multiples of 512 for files
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191 | bed5cc52 | bellard | * opened with O_DIRECT. buf must be aligned to 512 bytes then.
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192 | bed5cc52 | bellard | *
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193 | bed5cc52 | bellard | * This function may be called without alignment if the caller ensures
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194 | bed5cc52 | bellard | * that O_DIRECT is not in effect.
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195 | bed5cc52 | bellard | */
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196 | bed5cc52 | bellard | static int raw_pread_aligned(BlockDriverState *bs, int64_t offset, |
197 | 83f64091 | bellard | uint8_t *buf, int count)
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198 | 83f64091 | bellard | { |
199 | 83f64091 | bellard | BDRVRawState *s = bs->opaque; |
200 | 83f64091 | bellard | int ret;
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201 | 3b46e624 | ths | |
202 | 19cb3738 | bellard | ret = fd_open(bs); |
203 | 19cb3738 | bellard | if (ret < 0) |
204 | 19cb3738 | bellard | return ret;
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205 | 19cb3738 | bellard | |
206 | 985a03b0 | ths | if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) { |
207 | 8c05dbf9 | ths | ++(s->lseek_err_cnt); |
208 | 8c05dbf9 | ths | if(s->lseek_err_cnt <= 10) { |
209 | 92868412 | j_mayer | DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
210 | 92868412 | j_mayer | "] lseek failed : %d = %s\n",
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211 | 8c05dbf9 | ths | s->fd, bs->filename, offset, buf, count, |
212 | 8c05dbf9 | ths | bs->total_sectors, errno, strerror(errno)); |
213 | 8c05dbf9 | ths | } |
214 | 8c05dbf9 | ths | return -1; |
215 | 8c05dbf9 | ths | } |
216 | 8c05dbf9 | ths | s->lseek_err_cnt=0;
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217 | 8c05dbf9 | ths | |
218 | 83f64091 | bellard | ret = read(s->fd, buf, count); |
219 | 8c05dbf9 | ths | if (ret == count)
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220 | 8c05dbf9 | ths | goto label__raw_read__success;
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221 | 8c05dbf9 | ths | |
222 | 92868412 | j_mayer | DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
223 | 92868412 | j_mayer | "] read failed %d : %d = %s\n",
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224 | 8c05dbf9 | ths | s->fd, bs->filename, offset, buf, count, |
225 | 8c05dbf9 | ths | bs->total_sectors, ret, errno, strerror(errno)); |
226 | 8c05dbf9 | ths | |
227 | 8c05dbf9 | ths | /* Try harder for CDrom. */
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228 | 8c05dbf9 | ths | if (bs->type == BDRV_TYPE_CDROM) {
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229 | 8c05dbf9 | ths | lseek(s->fd, offset, SEEK_SET); |
230 | 8c05dbf9 | ths | ret = read(s->fd, buf, count); |
231 | 8c05dbf9 | ths | if (ret == count)
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232 | 8c05dbf9 | ths | goto label__raw_read__success;
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233 | 8c05dbf9 | ths | lseek(s->fd, offset, SEEK_SET); |
234 | 8c05dbf9 | ths | ret = read(s->fd, buf, count); |
235 | 8c05dbf9 | ths | if (ret == count)
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236 | 8c05dbf9 | ths | goto label__raw_read__success;
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237 | 8c05dbf9 | ths | |
238 | 92868412 | j_mayer | DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
239 | 92868412 | j_mayer | "] retry read failed %d : %d = %s\n",
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240 | 8c05dbf9 | ths | s->fd, bs->filename, offset, buf, count, |
241 | 8c05dbf9 | ths | bs->total_sectors, ret, errno, strerror(errno)); |
242 | 8c05dbf9 | ths | } |
243 | 8c05dbf9 | ths | |
244 | 8c05dbf9 | ths | label__raw_read__success:
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245 | 8c05dbf9 | ths | |
246 | 83f64091 | bellard | return ret;
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247 | 83f64091 | bellard | } |
248 | 83f64091 | bellard | |
249 | bed5cc52 | bellard | /*
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250 | bed5cc52 | bellard | * offset and count are in bytes, but must be multiples of 512 for files
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251 | bed5cc52 | bellard | * opened with O_DIRECT. buf must be aligned to 512 bytes then.
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252 | bed5cc52 | bellard | *
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253 | bed5cc52 | bellard | * This function may be called without alignment if the caller ensures
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254 | bed5cc52 | bellard | * that O_DIRECT is not in effect.
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255 | bed5cc52 | bellard | */
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256 | bed5cc52 | bellard | static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset, |
257 | 83f64091 | bellard | const uint8_t *buf, int count) |
258 | 83f64091 | bellard | { |
259 | 83f64091 | bellard | BDRVRawState *s = bs->opaque; |
260 | 83f64091 | bellard | int ret;
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261 | 3b46e624 | ths | |
262 | 19cb3738 | bellard | ret = fd_open(bs); |
263 | 19cb3738 | bellard | if (ret < 0) |
264 | 19cb3738 | bellard | return ret;
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265 | 19cb3738 | bellard | |
266 | 985a03b0 | ths | if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) { |
267 | 8c05dbf9 | ths | ++(s->lseek_err_cnt); |
268 | 8c05dbf9 | ths | if(s->lseek_err_cnt) {
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269 | 92868412 | j_mayer | DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" |
270 | 92868412 | j_mayer | PRId64 "] lseek failed : %d = %s\n",
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271 | 8c05dbf9 | ths | s->fd, bs->filename, offset, buf, count, |
272 | 8c05dbf9 | ths | bs->total_sectors, errno, strerror(errno)); |
273 | 8c05dbf9 | ths | } |
274 | 8c05dbf9 | ths | return -1; |
275 | 8c05dbf9 | ths | } |
276 | 8c05dbf9 | ths | s->lseek_err_cnt = 0;
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277 | 8c05dbf9 | ths | |
278 | 83f64091 | bellard | ret = write(s->fd, buf, count); |
279 | 8c05dbf9 | ths | if (ret == count)
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280 | 8c05dbf9 | ths | goto label__raw_write__success;
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281 | 8c05dbf9 | ths | |
282 | 92868412 | j_mayer | DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
283 | 92868412 | j_mayer | "] write failed %d : %d = %s\n",
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284 | 8c05dbf9 | ths | s->fd, bs->filename, offset, buf, count, |
285 | 8c05dbf9 | ths | bs->total_sectors, ret, errno, strerror(errno)); |
286 | 8c05dbf9 | ths | |
287 | 8c05dbf9 | ths | label__raw_write__success:
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288 | 8c05dbf9 | ths | |
289 | 83f64091 | bellard | return ret;
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290 | 83f64091 | bellard | } |
291 | 83f64091 | bellard | |
292 | bed5cc52 | bellard | |
293 | bed5cc52 | bellard | /*
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294 | bed5cc52 | bellard | * offset and count are in bytes and possibly not aligned. For files opened
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295 | bed5cc52 | bellard | * with O_DIRECT, necessary alignments are ensured before calling
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296 | bed5cc52 | bellard | * raw_pread_aligned to do the actual read.
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297 | bed5cc52 | bellard | */
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298 | bed5cc52 | bellard | static int raw_pread(BlockDriverState *bs, int64_t offset, |
299 | bed5cc52 | bellard | uint8_t *buf, int count)
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300 | bed5cc52 | bellard | { |
301 | bed5cc52 | bellard | BDRVRawState *s = bs->opaque; |
302 | bed5cc52 | bellard | int size, ret, shift, sum;
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303 | bed5cc52 | bellard | |
304 | bed5cc52 | bellard | sum = 0;
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305 | bed5cc52 | bellard | |
306 | bed5cc52 | bellard | if (s->aligned_buf != NULL) { |
307 | bed5cc52 | bellard | |
308 | bed5cc52 | bellard | if (offset & 0x1ff) { |
309 | bed5cc52 | bellard | /* align offset on a 512 bytes boundary */
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310 | bed5cc52 | bellard | |
311 | bed5cc52 | bellard | shift = offset & 0x1ff;
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312 | bed5cc52 | bellard | size = (shift + count + 0x1ff) & ~0x1ff; |
313 | bed5cc52 | bellard | if (size > ALIGNED_BUFFER_SIZE)
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314 | bed5cc52 | bellard | size = ALIGNED_BUFFER_SIZE; |
315 | bed5cc52 | bellard | ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, size); |
316 | bed5cc52 | bellard | if (ret < 0) |
317 | bed5cc52 | bellard | return ret;
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318 | bed5cc52 | bellard | |
319 | bed5cc52 | bellard | size = 512 - shift;
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320 | bed5cc52 | bellard | if (size > count)
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321 | bed5cc52 | bellard | size = count; |
322 | bed5cc52 | bellard | memcpy(buf, s->aligned_buf + shift, size); |
323 | bed5cc52 | bellard | |
324 | bed5cc52 | bellard | buf += size; |
325 | bed5cc52 | bellard | offset += size; |
326 | bed5cc52 | bellard | count -= size; |
327 | bed5cc52 | bellard | sum += size; |
328 | bed5cc52 | bellard | |
329 | bed5cc52 | bellard | if (count == 0) |
330 | bed5cc52 | bellard | return sum;
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331 | bed5cc52 | bellard | } |
332 | bed5cc52 | bellard | if (count & 0x1ff || (uintptr_t) buf & 0x1ff) { |
333 | bed5cc52 | bellard | |
334 | bed5cc52 | bellard | /* read on aligned buffer */
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335 | bed5cc52 | bellard | |
336 | bed5cc52 | bellard | while (count) {
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337 | bed5cc52 | bellard | |
338 | bed5cc52 | bellard | size = (count + 0x1ff) & ~0x1ff; |
339 | bed5cc52 | bellard | if (size > ALIGNED_BUFFER_SIZE)
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340 | bed5cc52 | bellard | size = ALIGNED_BUFFER_SIZE; |
341 | bed5cc52 | bellard | |
342 | bed5cc52 | bellard | ret = raw_pread_aligned(bs, offset, s->aligned_buf, size); |
343 | bed5cc52 | bellard | if (ret < 0) |
344 | bed5cc52 | bellard | return ret;
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345 | bed5cc52 | bellard | |
346 | bed5cc52 | bellard | size = ret; |
347 | bed5cc52 | bellard | if (size > count)
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348 | bed5cc52 | bellard | size = count; |
349 | bed5cc52 | bellard | |
350 | bed5cc52 | bellard | memcpy(buf, s->aligned_buf, size); |
351 | bed5cc52 | bellard | |
352 | bed5cc52 | bellard | buf += size; |
353 | bed5cc52 | bellard | offset += size; |
354 | bed5cc52 | bellard | count -= size; |
355 | bed5cc52 | bellard | sum += size; |
356 | bed5cc52 | bellard | } |
357 | bed5cc52 | bellard | |
358 | bed5cc52 | bellard | return sum;
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359 | bed5cc52 | bellard | } |
360 | bed5cc52 | bellard | } |
361 | bed5cc52 | bellard | |
362 | bed5cc52 | bellard | return raw_pread_aligned(bs, offset, buf, count) + sum;
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363 | bed5cc52 | bellard | } |
364 | bed5cc52 | bellard | |
365 | bed5cc52 | bellard | /*
|
366 | bed5cc52 | bellard | * offset and count are in bytes and possibly not aligned. For files opened
|
367 | bed5cc52 | bellard | * with O_DIRECT, necessary alignments are ensured before calling
|
368 | bed5cc52 | bellard | * raw_pwrite_aligned to do the actual write.
|
369 | bed5cc52 | bellard | */
|
370 | bed5cc52 | bellard | static int raw_pwrite(BlockDriverState *bs, int64_t offset, |
371 | bed5cc52 | bellard | const uint8_t *buf, int count) |
372 | bed5cc52 | bellard | { |
373 | bed5cc52 | bellard | BDRVRawState *s = bs->opaque; |
374 | bed5cc52 | bellard | int size, ret, shift, sum;
|
375 | bed5cc52 | bellard | |
376 | bed5cc52 | bellard | sum = 0;
|
377 | bed5cc52 | bellard | |
378 | bed5cc52 | bellard | if (s->aligned_buf != NULL) { |
379 | bed5cc52 | bellard | |
380 | bed5cc52 | bellard | if (offset & 0x1ff) { |
381 | bed5cc52 | bellard | /* align offset on a 512 bytes boundary */
|
382 | bed5cc52 | bellard | shift = offset & 0x1ff;
|
383 | bed5cc52 | bellard | ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, 512);
|
384 | bed5cc52 | bellard | if (ret < 0) |
385 | bed5cc52 | bellard | return ret;
|
386 | bed5cc52 | bellard | |
387 | bed5cc52 | bellard | size = 512 - shift;
|
388 | bed5cc52 | bellard | if (size > count)
|
389 | bed5cc52 | bellard | size = count; |
390 | bed5cc52 | bellard | memcpy(s->aligned_buf + shift, buf, size); |
391 | bed5cc52 | bellard | |
392 | bed5cc52 | bellard | ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, 512);
|
393 | bed5cc52 | bellard | if (ret < 0) |
394 | bed5cc52 | bellard | return ret;
|
395 | bed5cc52 | bellard | |
396 | bed5cc52 | bellard | buf += size; |
397 | bed5cc52 | bellard | offset += size; |
398 | bed5cc52 | bellard | count -= size; |
399 | bed5cc52 | bellard | sum += size; |
400 | bed5cc52 | bellard | |
401 | bed5cc52 | bellard | if (count == 0) |
402 | bed5cc52 | bellard | return sum;
|
403 | bed5cc52 | bellard | } |
404 | bed5cc52 | bellard | if (count & 0x1ff || (uintptr_t) buf & 0x1ff) { |
405 | bed5cc52 | bellard | |
406 | bed5cc52 | bellard | while ((size = (count & ~0x1ff)) != 0) { |
407 | bed5cc52 | bellard | |
408 | bed5cc52 | bellard | if (size > ALIGNED_BUFFER_SIZE)
|
409 | bed5cc52 | bellard | size = ALIGNED_BUFFER_SIZE; |
410 | bed5cc52 | bellard | |
411 | bed5cc52 | bellard | memcpy(s->aligned_buf, buf, size); |
412 | bed5cc52 | bellard | |
413 | bed5cc52 | bellard | ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size); |
414 | bed5cc52 | bellard | if (ret < 0) |
415 | bed5cc52 | bellard | return ret;
|
416 | bed5cc52 | bellard | |
417 | bed5cc52 | bellard | buf += ret; |
418 | bed5cc52 | bellard | offset += ret; |
419 | bed5cc52 | bellard | count -= ret; |
420 | bed5cc52 | bellard | sum += ret; |
421 | bed5cc52 | bellard | } |
422 | bed5cc52 | bellard | /* here, count < 512 because (count & ~0x1ff) == 0 */
|
423 | bed5cc52 | bellard | if (count) {
|
424 | bed5cc52 | bellard | ret = raw_pread_aligned(bs, offset, s->aligned_buf, 512);
|
425 | bed5cc52 | bellard | if (ret < 0) |
426 | bed5cc52 | bellard | return ret;
|
427 | bed5cc52 | bellard | memcpy(s->aligned_buf, buf, count); |
428 | bed5cc52 | bellard | |
429 | bed5cc52 | bellard | ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, 512);
|
430 | bed5cc52 | bellard | if (ret < 0) |
431 | bed5cc52 | bellard | return ret;
|
432 | bed5cc52 | bellard | if (count < ret)
|
433 | bed5cc52 | bellard | ret = count; |
434 | bed5cc52 | bellard | |
435 | bed5cc52 | bellard | sum += ret; |
436 | bed5cc52 | bellard | } |
437 | bed5cc52 | bellard | return sum;
|
438 | bed5cc52 | bellard | } |
439 | bed5cc52 | bellard | } |
440 | bed5cc52 | bellard | return raw_pwrite_aligned(bs, offset, buf, count) + sum;
|
441 | bed5cc52 | bellard | } |
442 | bed5cc52 | bellard | |
443 | 414f0dab | blueswir1 | #ifdef CONFIG_AIO
|
444 | 83f64091 | bellard | /***********************************************************/
|
445 | 19cb3738 | bellard | /* Unix AIO using POSIX AIO */
|
446 | 83f64091 | bellard | |
447 | 83f64091 | bellard | typedef struct RawAIOCB { |
448 | ce1a14dc | pbrook | BlockDriverAIOCB common; |
449 | 53538725 | aliguori | int fd;
|
450 | 83f64091 | bellard | struct aiocb aiocb;
|
451 | ce1a14dc | pbrook | struct RawAIOCB *next;
|
452 | bed5cc52 | bellard | int ret;
|
453 | 83f64091 | bellard | } RawAIOCB; |
454 | 83f64091 | bellard | |
455 | a76bab49 | aliguori | typedef struct PosixAioState |
456 | a76bab49 | aliguori | { |
457 | 9e472e10 | aliguori | int rfd, wfd;
|
458 | a76bab49 | aliguori | RawAIOCB *first_aio; |
459 | a76bab49 | aliguori | } PosixAioState; |
460 | 83f64091 | bellard | |
461 | 53538725 | aliguori | static int raw_fd_pool_get(BDRVRawState *s) |
462 | 53538725 | aliguori | { |
463 | 53538725 | aliguori | int i;
|
464 | 53538725 | aliguori | |
465 | 53538725 | aliguori | for (i = 0; i < RAW_FD_POOL_SIZE; i++) { |
466 | 53538725 | aliguori | /* already in use */
|
467 | 53538725 | aliguori | if (s->fd_pool[i] != -1) |
468 | 53538725 | aliguori | continue;
|
469 | 53538725 | aliguori | |
470 | 53538725 | aliguori | /* try to dup file descriptor */
|
471 | 53538725 | aliguori | s->fd_pool[i] = dup(s->fd); |
472 | 53538725 | aliguori | if (s->fd_pool[i] != -1) |
473 | 53538725 | aliguori | return s->fd_pool[i];
|
474 | 53538725 | aliguori | } |
475 | 53538725 | aliguori | |
476 | 53538725 | aliguori | /* we couldn't dup the file descriptor so just use the main one */
|
477 | 53538725 | aliguori | return s->fd;
|
478 | 53538725 | aliguori | } |
479 | 53538725 | aliguori | |
480 | 53538725 | aliguori | static void raw_fd_pool_put(RawAIOCB *acb) |
481 | 53538725 | aliguori | { |
482 | 53538725 | aliguori | BDRVRawState *s = acb->common.bs->opaque; |
483 | 53538725 | aliguori | int i;
|
484 | 53538725 | aliguori | |
485 | 53538725 | aliguori | for (i = 0; i < RAW_FD_POOL_SIZE; i++) { |
486 | 53538725 | aliguori | if (s->fd_pool[i] == acb->fd) {
|
487 | 53538725 | aliguori | close(s->fd_pool[i]); |
488 | 53538725 | aliguori | s->fd_pool[i] = -1;
|
489 | 53538725 | aliguori | } |
490 | 53538725 | aliguori | } |
491 | 53538725 | aliguori | } |
492 | 53538725 | aliguori | |
493 | a76bab49 | aliguori | static void posix_aio_read(void *opaque) |
494 | 83f64091 | bellard | { |
495 | a76bab49 | aliguori | PosixAioState *s = opaque; |
496 | ce1a14dc | pbrook | RawAIOCB *acb, **pacb; |
497 | 83f64091 | bellard | int ret;
|
498 | 9e472e10 | aliguori | ssize_t len; |
499 | 9e472e10 | aliguori | |
500 | e20e830b | aliguori | /* read all bytes from signal pipe */
|
501 | e20e830b | aliguori | for (;;) {
|
502 | e20e830b | aliguori | char bytes[16]; |
503 | 9e472e10 | aliguori | |
504 | e20e830b | aliguori | len = read(s->rfd, bytes, sizeof(bytes));
|
505 | 2c41a5f9 | aliguori | if (len == -1 && errno == EINTR) |
506 | e20e830b | aliguori | continue; /* try again */ |
507 | e20e830b | aliguori | if (len == sizeof(bytes)) |
508 | e20e830b | aliguori | continue; /* more to read */ |
509 | e20e830b | aliguori | break;
|
510 | e20e830b | aliguori | } |
511 | 83f64091 | bellard | |
512 | 83f64091 | bellard | for(;;) {
|
513 | a76bab49 | aliguori | pacb = &s->first_aio; |
514 | 83f64091 | bellard | for(;;) {
|
515 | 83f64091 | bellard | acb = *pacb; |
516 | 83f64091 | bellard | if (!acb)
|
517 | 83f64091 | bellard | goto the_end;
|
518 | ce1a14dc | pbrook | ret = aio_error(&acb->aiocb); |
519 | 83f64091 | bellard | if (ret == ECANCELED) {
|
520 | 83f64091 | bellard | /* remove the request */
|
521 | ce1a14dc | pbrook | *pacb = acb->next; |
522 | 53538725 | aliguori | raw_fd_pool_put(acb); |
523 | ce1a14dc | pbrook | qemu_aio_release(acb); |
524 | 83f64091 | bellard | } else if (ret != EINPROGRESS) { |
525 | 83f64091 | bellard | /* end of aio */
|
526 | 83f64091 | bellard | if (ret == 0) { |
527 | ce1a14dc | pbrook | ret = aio_return(&acb->aiocb); |
528 | ce1a14dc | pbrook | if (ret == acb->aiocb.aio_nbytes)
|
529 | 83f64091 | bellard | ret = 0;
|
530 | 83f64091 | bellard | else
|
531 | 19cb3738 | bellard | ret = -EINVAL; |
532 | 83f64091 | bellard | } else {
|
533 | 83f64091 | bellard | ret = -ret; |
534 | 83f64091 | bellard | } |
535 | 83f64091 | bellard | /* remove the request */
|
536 | ce1a14dc | pbrook | *pacb = acb->next; |
537 | 83f64091 | bellard | /* call the callback */
|
538 | ce1a14dc | pbrook | acb->common.cb(acb->common.opaque, ret); |
539 | 53538725 | aliguori | raw_fd_pool_put(acb); |
540 | ce1a14dc | pbrook | qemu_aio_release(acb); |
541 | 83f64091 | bellard | break;
|
542 | 83f64091 | bellard | } else {
|
543 | ce1a14dc | pbrook | pacb = &acb->next; |
544 | 83f64091 | bellard | } |
545 | 83f64091 | bellard | } |
546 | 83f64091 | bellard | } |
547 | 83f64091 | bellard | the_end: ;
|
548 | 83f64091 | bellard | } |
549 | 83f64091 | bellard | |
550 | a76bab49 | aliguori | static int posix_aio_flush(void *opaque) |
551 | baf35cb9 | aliguori | { |
552 | a76bab49 | aliguori | PosixAioState *s = opaque; |
553 | a76bab49 | aliguori | return !!s->first_aio;
|
554 | a76bab49 | aliguori | } |
555 | a76bab49 | aliguori | |
556 | a76bab49 | aliguori | static PosixAioState *posix_aio_state;
|
557 | baf35cb9 | aliguori | |
558 | 9e472e10 | aliguori | static void aio_signal_handler(int signum) |
559 | 9e472e10 | aliguori | { |
560 | 9e472e10 | aliguori | if (posix_aio_state) {
|
561 | 9e472e10 | aliguori | char byte = 0; |
562 | 9e472e10 | aliguori | |
563 | 9e472e10 | aliguori | write(posix_aio_state->wfd, &byte, sizeof(byte));
|
564 | 9e472e10 | aliguori | } |
565 | 9e472e10 | aliguori | |
566 | 9e472e10 | aliguori | qemu_service_io(); |
567 | 9e472e10 | aliguori | } |
568 | 9e472e10 | aliguori | |
569 | a76bab49 | aliguori | static int posix_aio_init(void) |
570 | a76bab49 | aliguori | { |
571 | 9e472e10 | aliguori | struct sigaction act;
|
572 | a76bab49 | aliguori | PosixAioState *s; |
573 | 9e472e10 | aliguori | int fds[2]; |
574 | a76bab49 | aliguori | |
575 | a76bab49 | aliguori | if (posix_aio_state)
|
576 | a76bab49 | aliguori | return 0; |
577 | ad02ad6f | aliguori | |
578 | a76bab49 | aliguori | s = qemu_malloc(sizeof(PosixAioState));
|
579 | a76bab49 | aliguori | if (s == NULL) |
580 | a76bab49 | aliguori | return -ENOMEM;
|
581 | baf35cb9 | aliguori | |
582 | 9e472e10 | aliguori | sigfillset(&act.sa_mask); |
583 | 9e472e10 | aliguori | act.sa_flags = 0; /* do not restart syscalls to interrupt select() */ |
584 | 9e472e10 | aliguori | act.sa_handler = aio_signal_handler; |
585 | 9e472e10 | aliguori | sigaction(SIGUSR2, &act, NULL);
|
586 | 9e472e10 | aliguori | |
587 | a76bab49 | aliguori | s->first_aio = NULL;
|
588 | 9e472e10 | aliguori | if (pipe(fds) == -1) { |
589 | 9e472e10 | aliguori | fprintf(stderr, "failed to create pipe\n");
|
590 | 27463101 | aliguori | return -errno;
|
591 | 27463101 | aliguori | } |
592 | 2c41a5f9 | aliguori | |
593 | 9e472e10 | aliguori | s->rfd = fds[0];
|
594 | 9e472e10 | aliguori | s->wfd = fds[1];
|
595 | 9e472e10 | aliguori | |
596 | e20e830b | aliguori | fcntl(s->rfd, F_SETFL, O_NONBLOCK); |
597 | 9e472e10 | aliguori | fcntl(s->wfd, F_SETFL, O_NONBLOCK); |
598 | 2c41a5f9 | aliguori | |
599 | 9e472e10 | aliguori | qemu_aio_set_fd_handler(s->rfd, posix_aio_read, NULL, posix_aio_flush, s);
|
600 | baf35cb9 | aliguori | |
601 | acce87f9 | aliguori | #if defined(__linux__)
|
602 | acce87f9 | aliguori | { |
603 | acce87f9 | aliguori | struct aioinit ai;
|
604 | acce87f9 | aliguori | |
605 | acce87f9 | aliguori | memset(&ai, 0, sizeof(ai)); |
606 | acce87f9 | aliguori | #if defined(__GLIBC_PREREQ) && __GLIBC_PREREQ(2, 4) |
607 | acce87f9 | aliguori | ai.aio_threads = 64;
|
608 | acce87f9 | aliguori | ai.aio_num = 64;
|
609 | 997306fc | aliguori | #else
|
610 | acce87f9 | aliguori | /* XXX: aio thread exit seems to hang on RedHat 9 and this init
|
611 | acce87f9 | aliguori | seems to fix the problem. */
|
612 | acce87f9 | aliguori | ai.aio_threads = 1;
|
613 | acce87f9 | aliguori | ai.aio_num = 1;
|
614 | acce87f9 | aliguori | ai.aio_idle_time = 365 * 100000; |
615 | acce87f9 | aliguori | #endif
|
616 | acce87f9 | aliguori | aio_init(&ai); |
617 | acce87f9 | aliguori | } |
618 | baf35cb9 | aliguori | #endif
|
619 | a76bab49 | aliguori | posix_aio_state = s; |
620 | 6eb5733a | bellard | |
621 | a76bab49 | aliguori | return 0; |
622 | 83f64091 | bellard | } |
623 | 83f64091 | bellard | |
624 | ce1a14dc | pbrook | static RawAIOCB *raw_aio_setup(BlockDriverState *bs,
|
625 | ce1a14dc | pbrook | int64_t sector_num, uint8_t *buf, int nb_sectors,
|
626 | ce1a14dc | pbrook | BlockDriverCompletionFunc *cb, void *opaque)
|
627 | 83f64091 | bellard | { |
628 | ce1a14dc | pbrook | BDRVRawState *s = bs->opaque; |
629 | ce1a14dc | pbrook | RawAIOCB *acb; |
630 | ce1a14dc | pbrook | |
631 | 19cb3738 | bellard | if (fd_open(bs) < 0) |
632 | 19cb3738 | bellard | return NULL; |
633 | 19cb3738 | bellard | |
634 | ce1a14dc | pbrook | acb = qemu_aio_get(bs, cb, opaque); |
635 | ce1a14dc | pbrook | if (!acb)
|
636 | ce1a14dc | pbrook | return NULL; |
637 | 53538725 | aliguori | acb->fd = raw_fd_pool_get(s); |
638 | 53538725 | aliguori | acb->aiocb.aio_fildes = acb->fd; |
639 | a76bab49 | aliguori | acb->aiocb.aio_sigevent.sigev_signo = SIGUSR2; |
640 | ce1a14dc | pbrook | acb->aiocb.aio_sigevent.sigev_notify = SIGEV_SIGNAL; |
641 | ce1a14dc | pbrook | acb->aiocb.aio_buf = buf; |
642 | 985a03b0 | ths | if (nb_sectors < 0) |
643 | 985a03b0 | ths | acb->aiocb.aio_nbytes = -nb_sectors; |
644 | 985a03b0 | ths | else
|
645 | 985a03b0 | ths | acb->aiocb.aio_nbytes = nb_sectors * 512;
|
646 | ce1a14dc | pbrook | acb->aiocb.aio_offset = sector_num * 512;
|
647 | a76bab49 | aliguori | acb->next = posix_aio_state->first_aio; |
648 | a76bab49 | aliguori | posix_aio_state->first_aio = acb; |
649 | ce1a14dc | pbrook | return acb;
|
650 | 83f64091 | bellard | } |
651 | 83f64091 | bellard | |
652 | bed5cc52 | bellard | static void raw_aio_em_cb(void* opaque) |
653 | bed5cc52 | bellard | { |
654 | bed5cc52 | bellard | RawAIOCB *acb = opaque; |
655 | bed5cc52 | bellard | acb->common.cb(acb->common.opaque, acb->ret); |
656 | bed5cc52 | bellard | qemu_aio_release(acb); |
657 | bed5cc52 | bellard | } |
658 | bed5cc52 | bellard | |
659 | ce1a14dc | pbrook | static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
|
660 | ce1a14dc | pbrook | int64_t sector_num, uint8_t *buf, int nb_sectors,
|
661 | ce1a14dc | pbrook | BlockDriverCompletionFunc *cb, void *opaque)
|
662 | 83f64091 | bellard | { |
663 | ce1a14dc | pbrook | RawAIOCB *acb; |
664 | 83f64091 | bellard | |
665 | bed5cc52 | bellard | /*
|
666 | bed5cc52 | bellard | * If O_DIRECT is used and the buffer is not aligned fall back
|
667 | bed5cc52 | bellard | * to synchronous IO.
|
668 | bed5cc52 | bellard | */
|
669 | bed5cc52 | bellard | BDRVRawState *s = bs->opaque; |
670 | bed5cc52 | bellard | |
671 | bed5cc52 | bellard | if (unlikely(s->aligned_buf != NULL && ((uintptr_t) buf % 512))) { |
672 | bed5cc52 | bellard | QEMUBH *bh; |
673 | bed5cc52 | bellard | acb = qemu_aio_get(bs, cb, opaque); |
674 | bed5cc52 | bellard | acb->ret = raw_pread(bs, 512 * sector_num, buf, 512 * nb_sectors); |
675 | bed5cc52 | bellard | bh = qemu_bh_new(raw_aio_em_cb, acb); |
676 | bed5cc52 | bellard | qemu_bh_schedule(bh); |
677 | bed5cc52 | bellard | return &acb->common;
|
678 | bed5cc52 | bellard | } |
679 | bed5cc52 | bellard | |
680 | ce1a14dc | pbrook | acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque); |
681 | ce1a14dc | pbrook | if (!acb)
|
682 | ce1a14dc | pbrook | return NULL; |
683 | ce1a14dc | pbrook | if (aio_read(&acb->aiocb) < 0) { |
684 | ce1a14dc | pbrook | qemu_aio_release(acb); |
685 | ce1a14dc | pbrook | return NULL; |
686 | 5fafdf24 | ths | } |
687 | ce1a14dc | pbrook | return &acb->common;
|
688 | 83f64091 | bellard | } |
689 | 83f64091 | bellard | |
690 | ce1a14dc | pbrook | static BlockDriverAIOCB *raw_aio_write(BlockDriverState *bs,
|
691 | ce1a14dc | pbrook | int64_t sector_num, const uint8_t *buf, int nb_sectors, |
692 | ce1a14dc | pbrook | BlockDriverCompletionFunc *cb, void *opaque)
|
693 | 83f64091 | bellard | { |
694 | ce1a14dc | pbrook | RawAIOCB *acb; |
695 | 83f64091 | bellard | |
696 | bed5cc52 | bellard | /*
|
697 | bed5cc52 | bellard | * If O_DIRECT is used and the buffer is not aligned fall back
|
698 | bed5cc52 | bellard | * to synchronous IO.
|
699 | bed5cc52 | bellard | */
|
700 | bed5cc52 | bellard | BDRVRawState *s = bs->opaque; |
701 | bed5cc52 | bellard | |
702 | bed5cc52 | bellard | if (unlikely(s->aligned_buf != NULL && ((uintptr_t) buf % 512))) { |
703 | bed5cc52 | bellard | QEMUBH *bh; |
704 | bed5cc52 | bellard | acb = qemu_aio_get(bs, cb, opaque); |
705 | bed5cc52 | bellard | acb->ret = raw_pwrite(bs, 512 * sector_num, buf, 512 * nb_sectors); |
706 | bed5cc52 | bellard | bh = qemu_bh_new(raw_aio_em_cb, acb); |
707 | bed5cc52 | bellard | qemu_bh_schedule(bh); |
708 | bed5cc52 | bellard | return &acb->common;
|
709 | bed5cc52 | bellard | } |
710 | bed5cc52 | bellard | |
711 | ce1a14dc | pbrook | acb = raw_aio_setup(bs, sector_num, (uint8_t*)buf, nb_sectors, cb, opaque); |
712 | ce1a14dc | pbrook | if (!acb)
|
713 | ce1a14dc | pbrook | return NULL; |
714 | ce1a14dc | pbrook | if (aio_write(&acb->aiocb) < 0) { |
715 | ce1a14dc | pbrook | qemu_aio_release(acb); |
716 | ce1a14dc | pbrook | return NULL; |
717 | 5fafdf24 | ths | } |
718 | ce1a14dc | pbrook | return &acb->common;
|
719 | 83f64091 | bellard | } |
720 | 83f64091 | bellard | |
721 | ce1a14dc | pbrook | static void raw_aio_cancel(BlockDriverAIOCB *blockacb) |
722 | 83f64091 | bellard | { |
723 | 83f64091 | bellard | int ret;
|
724 | ce1a14dc | pbrook | RawAIOCB *acb = (RawAIOCB *)blockacb; |
725 | ce1a14dc | pbrook | RawAIOCB **pacb; |
726 | 83f64091 | bellard | |
727 | ce1a14dc | pbrook | ret = aio_cancel(acb->aiocb.aio_fildes, &acb->aiocb); |
728 | 83f64091 | bellard | if (ret == AIO_NOTCANCELED) {
|
729 | 83f64091 | bellard | /* fail safe: if the aio could not be canceled, we wait for
|
730 | 83f64091 | bellard | it */
|
731 | ce1a14dc | pbrook | while (aio_error(&acb->aiocb) == EINPROGRESS);
|
732 | 83f64091 | bellard | } |
733 | 83f64091 | bellard | |
734 | 83f64091 | bellard | /* remove the callback from the queue */
|
735 | a76bab49 | aliguori | pacb = &posix_aio_state->first_aio; |
736 | 83f64091 | bellard | for(;;) {
|
737 | 83f64091 | bellard | if (*pacb == NULL) { |
738 | 83f64091 | bellard | break;
|
739 | 83f64091 | bellard | } else if (*pacb == acb) { |
740 | ce1a14dc | pbrook | *pacb = acb->next; |
741 | 53538725 | aliguori | raw_fd_pool_put(acb); |
742 | ce1a14dc | pbrook | qemu_aio_release(acb); |
743 | 83f64091 | bellard | break;
|
744 | 83f64091 | bellard | } |
745 | ce1a14dc | pbrook | pacb = &acb->next; |
746 | 83f64091 | bellard | } |
747 | 83f64091 | bellard | } |
748 | 83f64091 | bellard | |
749 | a76bab49 | aliguori | #else /* CONFIG_AIO */ |
750 | a76bab49 | aliguori | static int posix_aio_init(void) |
751 | 414f0dab | blueswir1 | { |
752 | 674a24ac | blueswir1 | return 0; |
753 | 414f0dab | blueswir1 | } |
754 | 414f0dab | blueswir1 | #endif /* CONFIG_AIO */ |
755 | 414f0dab | blueswir1 | |
756 | 53538725 | aliguori | static void raw_close_fd_pool(BDRVRawState *s) |
757 | 53538725 | aliguori | { |
758 | 53538725 | aliguori | int i;
|
759 | 53538725 | aliguori | |
760 | 53538725 | aliguori | for (i = 0; i < RAW_FD_POOL_SIZE; i++) { |
761 | 53538725 | aliguori | if (s->fd_pool[i] != -1) { |
762 | 53538725 | aliguori | close(s->fd_pool[i]); |
763 | 53538725 | aliguori | s->fd_pool[i] = -1;
|
764 | 53538725 | aliguori | } |
765 | 53538725 | aliguori | } |
766 | 53538725 | aliguori | } |
767 | 53538725 | aliguori | |
768 | 83f64091 | bellard | static void raw_close(BlockDriverState *bs) |
769 | 83f64091 | bellard | { |
770 | 83f64091 | bellard | BDRVRawState *s = bs->opaque; |
771 | 19cb3738 | bellard | if (s->fd >= 0) { |
772 | 19cb3738 | bellard | close(s->fd); |
773 | 19cb3738 | bellard | s->fd = -1;
|
774 | bed5cc52 | bellard | if (s->aligned_buf != NULL) |
775 | bed5cc52 | bellard | qemu_free(s->aligned_buf); |
776 | 19cb3738 | bellard | } |
777 | 53538725 | aliguori | raw_close_fd_pool(s); |
778 | 83f64091 | bellard | } |
779 | 83f64091 | bellard | |
780 | 83f64091 | bellard | static int raw_truncate(BlockDriverState *bs, int64_t offset) |
781 | 83f64091 | bellard | { |
782 | 83f64091 | bellard | BDRVRawState *s = bs->opaque; |
783 | 19cb3738 | bellard | if (s->type != FTYPE_FILE)
|
784 | 19cb3738 | bellard | return -ENOTSUP;
|
785 | 83f64091 | bellard | if (ftruncate(s->fd, offset) < 0) |
786 | 83f64091 | bellard | return -errno;
|
787 | 83f64091 | bellard | return 0; |
788 | 83f64091 | bellard | } |
789 | 83f64091 | bellard | |
790 | 128ab2ff | blueswir1 | #ifdef __OpenBSD__
|
791 | 128ab2ff | blueswir1 | static int64_t raw_getlength(BlockDriverState *bs)
|
792 | 128ab2ff | blueswir1 | { |
793 | 128ab2ff | blueswir1 | BDRVRawState *s = bs->opaque; |
794 | 128ab2ff | blueswir1 | int fd = s->fd;
|
795 | 128ab2ff | blueswir1 | struct stat st;
|
796 | 128ab2ff | blueswir1 | |
797 | 128ab2ff | blueswir1 | if (fstat(fd, &st))
|
798 | 128ab2ff | blueswir1 | return -1; |
799 | 128ab2ff | blueswir1 | if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
|
800 | 128ab2ff | blueswir1 | struct disklabel dl;
|
801 | 128ab2ff | blueswir1 | |
802 | 128ab2ff | blueswir1 | if (ioctl(fd, DIOCGDINFO, &dl))
|
803 | 128ab2ff | blueswir1 | return -1; |
804 | 128ab2ff | blueswir1 | return (uint64_t)dl.d_secsize *
|
805 | 128ab2ff | blueswir1 | dl.d_partitions[DISKPART(st.st_rdev)].p_size; |
806 | 128ab2ff | blueswir1 | } else
|
807 | 128ab2ff | blueswir1 | return st.st_size;
|
808 | 128ab2ff | blueswir1 | } |
809 | 128ab2ff | blueswir1 | #else /* !__OpenBSD__ */ |
810 | 83f64091 | bellard | static int64_t raw_getlength(BlockDriverState *bs)
|
811 | 83f64091 | bellard | { |
812 | 83f64091 | bellard | BDRVRawState *s = bs->opaque; |
813 | 83f64091 | bellard | int fd = s->fd;
|
814 | 83f64091 | bellard | int64_t size; |
815 | 83f64091 | bellard | #ifdef _BSD
|
816 | 83f64091 | bellard | struct stat sb;
|
817 | 83f64091 | bellard | #endif
|
818 | 83f64091 | bellard | #ifdef __sun__
|
819 | 83f64091 | bellard | struct dk_minfo minfo;
|
820 | 83f64091 | bellard | int rv;
|
821 | 83f64091 | bellard | #endif
|
822 | 19cb3738 | bellard | int ret;
|
823 | 19cb3738 | bellard | |
824 | 19cb3738 | bellard | ret = fd_open(bs); |
825 | 19cb3738 | bellard | if (ret < 0) |
826 | 19cb3738 | bellard | return ret;
|
827 | 83f64091 | bellard | |
828 | 83f64091 | bellard | #ifdef _BSD
|
829 | 83f64091 | bellard | if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
|
830 | 83f64091 | bellard | #ifdef DIOCGMEDIASIZE
|
831 | 83f64091 | bellard | if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
|
832 | 83f64091 | bellard | #endif
|
833 | 83f64091 | bellard | #ifdef CONFIG_COCOA
|
834 | 83f64091 | bellard | size = LONG_LONG_MAX; |
835 | 83f64091 | bellard | #else
|
836 | 83f64091 | bellard | size = lseek(fd, 0LL, SEEK_END);
|
837 | 83f64091 | bellard | #endif
|
838 | 83f64091 | bellard | } else
|
839 | 83f64091 | bellard | #endif
|
840 | 83f64091 | bellard | #ifdef __sun__
|
841 | 83f64091 | bellard | /*
|
842 | 83f64091 | bellard | * use the DKIOCGMEDIAINFO ioctl to read the size.
|
843 | 83f64091 | bellard | */
|
844 | 83f64091 | bellard | rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo ); |
845 | 83f64091 | bellard | if ( rv != -1 ) { |
846 | 83f64091 | bellard | size = minfo.dki_lbsize * minfo.dki_capacity; |
847 | 83f64091 | bellard | } else /* there are reports that lseek on some devices |
848 | 83f64091 | bellard | fails, but irc discussion said that contingency
|
849 | 83f64091 | bellard | on contingency was overkill */
|
850 | 83f64091 | bellard | #endif
|
851 | 83f64091 | bellard | { |
852 | 83f64091 | bellard | size = lseek(fd, 0, SEEK_END);
|
853 | 83f64091 | bellard | } |
854 | 83f64091 | bellard | return size;
|
855 | 83f64091 | bellard | } |
856 | 128ab2ff | blueswir1 | #endif
|
857 | 83f64091 | bellard | |
858 | 83f64091 | bellard | static int raw_create(const char *filename, int64_t total_size, |
859 | 83f64091 | bellard | const char *backing_file, int flags) |
860 | 83f64091 | bellard | { |
861 | 83f64091 | bellard | int fd;
|
862 | 83f64091 | bellard | |
863 | 83f64091 | bellard | if (flags || backing_file)
|
864 | 83f64091 | bellard | return -ENOTSUP;
|
865 | 83f64091 | bellard | |
866 | 5fafdf24 | ths | fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, |
867 | 83f64091 | bellard | 0644);
|
868 | 83f64091 | bellard | if (fd < 0) |
869 | 83f64091 | bellard | return -EIO;
|
870 | 83f64091 | bellard | ftruncate(fd, total_size * 512);
|
871 | 83f64091 | bellard | close(fd); |
872 | 83f64091 | bellard | return 0; |
873 | 83f64091 | bellard | } |
874 | 83f64091 | bellard | |
875 | 83f64091 | bellard | static void raw_flush(BlockDriverState *bs) |
876 | 83f64091 | bellard | { |
877 | 83f64091 | bellard | BDRVRawState *s = bs->opaque; |
878 | 83f64091 | bellard | fsync(s->fd); |
879 | 83f64091 | bellard | } |
880 | 83f64091 | bellard | |
881 | 83f64091 | bellard | BlockDriver bdrv_raw = { |
882 | 83f64091 | bellard | "raw",
|
883 | 83f64091 | bellard | sizeof(BDRVRawState),
|
884 | 83f64091 | bellard | NULL, /* no probe for protocols */ |
885 | 83f64091 | bellard | raw_open, |
886 | 83f64091 | bellard | NULL,
|
887 | 83f64091 | bellard | NULL,
|
888 | 83f64091 | bellard | raw_close, |
889 | 83f64091 | bellard | raw_create, |
890 | 83f64091 | bellard | raw_flush, |
891 | 3b46e624 | ths | |
892 | 414f0dab | blueswir1 | #ifdef CONFIG_AIO
|
893 | 83f64091 | bellard | .bdrv_aio_read = raw_aio_read, |
894 | 83f64091 | bellard | .bdrv_aio_write = raw_aio_write, |
895 | 83f64091 | bellard | .bdrv_aio_cancel = raw_aio_cancel, |
896 | ce1a14dc | pbrook | .aiocb_size = sizeof(RawAIOCB),
|
897 | 414f0dab | blueswir1 | #endif
|
898 | 83f64091 | bellard | .bdrv_pread = raw_pread, |
899 | 83f64091 | bellard | .bdrv_pwrite = raw_pwrite, |
900 | 83f64091 | bellard | .bdrv_truncate = raw_truncate, |
901 | 83f64091 | bellard | .bdrv_getlength = raw_getlength, |
902 | 83f64091 | bellard | }; |
903 | 83f64091 | bellard | |
904 | 19cb3738 | bellard | /***********************************************/
|
905 | 19cb3738 | bellard | /* host device */
|
906 | 19cb3738 | bellard | |
907 | 19cb3738 | bellard | #ifdef CONFIG_COCOA
|
908 | 19cb3738 | bellard | static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
|
909 | 19cb3738 | bellard | static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ); |
910 | 19cb3738 | bellard | |
911 | 19cb3738 | bellard | kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ) |
912 | 19cb3738 | bellard | { |
913 | 5fafdf24 | ths | kern_return_t kernResult; |
914 | 19cb3738 | bellard | mach_port_t masterPort; |
915 | 19cb3738 | bellard | CFMutableDictionaryRef classesToMatch; |
916 | 19cb3738 | bellard | |
917 | 19cb3738 | bellard | kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort ); |
918 | 19cb3738 | bellard | if ( KERN_SUCCESS != kernResult ) {
|
919 | 19cb3738 | bellard | printf( "IOMasterPort returned %d\n", kernResult );
|
920 | 19cb3738 | bellard | } |
921 | 3b46e624 | ths | |
922 | 5fafdf24 | ths | classesToMatch = IOServiceMatching( kIOCDMediaClass ); |
923 | 19cb3738 | bellard | if ( classesToMatch == NULL ) { |
924 | 19cb3738 | bellard | printf( "IOServiceMatching returned a NULL dictionary.\n" );
|
925 | 19cb3738 | bellard | } else {
|
926 | 19cb3738 | bellard | CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue ); |
927 | 19cb3738 | bellard | } |
928 | 19cb3738 | bellard | kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator ); |
929 | 19cb3738 | bellard | if ( KERN_SUCCESS != kernResult )
|
930 | 19cb3738 | bellard | { |
931 | 19cb3738 | bellard | printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
|
932 | 19cb3738 | bellard | } |
933 | 3b46e624 | ths | |
934 | 19cb3738 | bellard | return kernResult;
|
935 | 19cb3738 | bellard | } |
936 | 19cb3738 | bellard | |
937 | 19cb3738 | bellard | kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
|
938 | 19cb3738 | bellard | { |
939 | 19cb3738 | bellard | io_object_t nextMedia; |
940 | 19cb3738 | bellard | kern_return_t kernResult = KERN_FAILURE; |
941 | 19cb3738 | bellard | *bsdPath = '\0';
|
942 | 19cb3738 | bellard | nextMedia = IOIteratorNext( mediaIterator ); |
943 | 19cb3738 | bellard | if ( nextMedia )
|
944 | 19cb3738 | bellard | { |
945 | 19cb3738 | bellard | CFTypeRef bsdPathAsCFString; |
946 | 19cb3738 | bellard | bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
|
947 | 19cb3738 | bellard | if ( bsdPathAsCFString ) {
|
948 | 19cb3738 | bellard | size_t devPathLength; |
949 | 19cb3738 | bellard | strcpy( bsdPath, _PATH_DEV ); |
950 | 19cb3738 | bellard | strcat( bsdPath, "r" );
|
951 | 19cb3738 | bellard | devPathLength = strlen( bsdPath ); |
952 | 19cb3738 | bellard | if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
|
953 | 19cb3738 | bellard | kernResult = KERN_SUCCESS; |
954 | 19cb3738 | bellard | } |
955 | 19cb3738 | bellard | CFRelease( bsdPathAsCFString ); |
956 | 19cb3738 | bellard | } |
957 | 19cb3738 | bellard | IOObjectRelease( nextMedia ); |
958 | 19cb3738 | bellard | } |
959 | 3b46e624 | ths | |
960 | 19cb3738 | bellard | return kernResult;
|
961 | 19cb3738 | bellard | } |
962 | 19cb3738 | bellard | |
963 | 19cb3738 | bellard | #endif
|
964 | 19cb3738 | bellard | |
965 | 19cb3738 | bellard | static int hdev_open(BlockDriverState *bs, const char *filename, int flags) |
966 | 19cb3738 | bellard | { |
967 | 19cb3738 | bellard | BDRVRawState *s = bs->opaque; |
968 | 53538725 | aliguori | int fd, open_flags, ret, i;
|
969 | 19cb3738 | bellard | |
970 | a76bab49 | aliguori | posix_aio_init(); |
971 | a76bab49 | aliguori | |
972 | 19cb3738 | bellard | #ifdef CONFIG_COCOA
|
973 | 19cb3738 | bellard | if (strstart(filename, "/dev/cdrom", NULL)) { |
974 | 19cb3738 | bellard | kern_return_t kernResult; |
975 | 19cb3738 | bellard | io_iterator_t mediaIterator; |
976 | 19cb3738 | bellard | char bsdPath[ MAXPATHLEN ];
|
977 | 19cb3738 | bellard | int fd;
|
978 | 5fafdf24 | ths | |
979 | 19cb3738 | bellard | kernResult = FindEjectableCDMedia( &mediaIterator ); |
980 | 19cb3738 | bellard | kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
|
981 | 3b46e624 | ths | |
982 | 19cb3738 | bellard | if ( bsdPath[ 0 ] != '\0' ) { |
983 | 19cb3738 | bellard | strcat(bsdPath,"s0");
|
984 | 19cb3738 | bellard | /* some CDs don't have a partition 0 */
|
985 | 19cb3738 | bellard | fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE); |
986 | 19cb3738 | bellard | if (fd < 0) { |
987 | 19cb3738 | bellard | bsdPath[strlen(bsdPath)-1] = '1'; |
988 | 19cb3738 | bellard | } else {
|
989 | 19cb3738 | bellard | close(fd); |
990 | 19cb3738 | bellard | } |
991 | 19cb3738 | bellard | filename = bsdPath; |
992 | 19cb3738 | bellard | } |
993 | 3b46e624 | ths | |
994 | 19cb3738 | bellard | if ( mediaIterator )
|
995 | 19cb3738 | bellard | IOObjectRelease( mediaIterator ); |
996 | 19cb3738 | bellard | } |
997 | 19cb3738 | bellard | #endif
|
998 | 19cb3738 | bellard | open_flags = O_BINARY; |
999 | 19cb3738 | bellard | if ((flags & BDRV_O_ACCESS) == O_RDWR) {
|
1000 | 19cb3738 | bellard | open_flags |= O_RDWR; |
1001 | 19cb3738 | bellard | } else {
|
1002 | 19cb3738 | bellard | open_flags |= O_RDONLY; |
1003 | 19cb3738 | bellard | bs->read_only = 1;
|
1004 | 19cb3738 | bellard | } |
1005 | 9f7965c7 | aliguori | /* Use O_DSYNC for write-through caching, no flags for write-back caching,
|
1006 | 9f7965c7 | aliguori | * and O_DIRECT for no caching. */
|
1007 | 9f7965c7 | aliguori | if ((flags & BDRV_O_NOCACHE))
|
1008 | 33f00271 | balrog | open_flags |= O_DIRECT; |
1009 | 9f7965c7 | aliguori | else if (!(flags & BDRV_O_CACHE_WB)) |
1010 | 9f7965c7 | aliguori | open_flags |= O_DSYNC; |
1011 | 19cb3738 | bellard | |
1012 | 19cb3738 | bellard | s->type = FTYPE_FILE; |
1013 | 19cb3738 | bellard | #if defined(__linux__)
|
1014 | 19cb3738 | bellard | if (strstart(filename, "/dev/cd", NULL)) { |
1015 | 19cb3738 | bellard | /* open will not fail even if no CD is inserted */
|
1016 | 19cb3738 | bellard | open_flags |= O_NONBLOCK; |
1017 | 19cb3738 | bellard | s->type = FTYPE_CD; |
1018 | 19cb3738 | bellard | } else if (strstart(filename, "/dev/fd", NULL)) { |
1019 | 19cb3738 | bellard | s->type = FTYPE_FD; |
1020 | 6dd2db52 | blueswir1 | s->fd_open_flags = open_flags; |
1021 | 19cb3738 | bellard | /* open will not fail even if no floppy is inserted */
|
1022 | 19cb3738 | bellard | open_flags |= O_NONBLOCK; |
1023 | 985a03b0 | ths | } else if (strstart(filename, "/dev/sg", NULL)) { |
1024 | 985a03b0 | ths | bs->sg = 1;
|
1025 | 19cb3738 | bellard | } |
1026 | 19cb3738 | bellard | #endif
|
1027 | 19cb3738 | bellard | fd = open(filename, open_flags, 0644);
|
1028 | 19cb3738 | bellard | if (fd < 0) { |
1029 | 19cb3738 | bellard | ret = -errno; |
1030 | 19cb3738 | bellard | if (ret == -EROFS)
|
1031 | 19cb3738 | bellard | ret = -EACCES; |
1032 | 19cb3738 | bellard | return ret;
|
1033 | 19cb3738 | bellard | } |
1034 | 19cb3738 | bellard | s->fd = fd; |
1035 | 53538725 | aliguori | for (i = 0; i < RAW_FD_POOL_SIZE; i++) |
1036 | 53538725 | aliguori | s->fd_pool[i] = -1;
|
1037 | 19cb3738 | bellard | #if defined(__linux__)
|
1038 | 19cb3738 | bellard | /* close fd so that we can reopen it as needed */
|
1039 | 19cb3738 | bellard | if (s->type == FTYPE_FD) {
|
1040 | 19cb3738 | bellard | close(s->fd); |
1041 | 19cb3738 | bellard | s->fd = -1;
|
1042 | 19cb3738 | bellard | s->fd_media_changed = 1;
|
1043 | 19cb3738 | bellard | } |
1044 | 19cb3738 | bellard | #endif
|
1045 | 19cb3738 | bellard | return 0; |
1046 | 19cb3738 | bellard | } |
1047 | 19cb3738 | bellard | |
1048 | 03ff3ca3 | aliguori | #if defined(__linux__)
|
1049 | 19cb3738 | bellard | /* Note: we do not have a reliable method to detect if the floppy is
|
1050 | 19cb3738 | bellard | present. The current method is to try to open the floppy at every
|
1051 | 19cb3738 | bellard | I/O and to keep it opened during a few hundreds of ms. */
|
1052 | 19cb3738 | bellard | static int fd_open(BlockDriverState *bs) |
1053 | 19cb3738 | bellard | { |
1054 | 19cb3738 | bellard | BDRVRawState *s = bs->opaque; |
1055 | 19cb3738 | bellard | int last_media_present;
|
1056 | 19cb3738 | bellard | |
1057 | 19cb3738 | bellard | if (s->type != FTYPE_FD)
|
1058 | 19cb3738 | bellard | return 0; |
1059 | 19cb3738 | bellard | last_media_present = (s->fd >= 0);
|
1060 | 5fafdf24 | ths | if (s->fd >= 0 && |
1061 | 19cb3738 | bellard | (qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) { |
1062 | 19cb3738 | bellard | close(s->fd); |
1063 | 19cb3738 | bellard | s->fd = -1;
|
1064 | 53538725 | aliguori | raw_close_fd_pool(s); |
1065 | 19cb3738 | bellard | #ifdef DEBUG_FLOPPY
|
1066 | 19cb3738 | bellard | printf("Floppy closed\n");
|
1067 | 19cb3738 | bellard | #endif
|
1068 | 19cb3738 | bellard | } |
1069 | 19cb3738 | bellard | if (s->fd < 0) { |
1070 | 5fafdf24 | ths | if (s->fd_got_error &&
|
1071 | 19cb3738 | bellard | (qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) { |
1072 | 19cb3738 | bellard | #ifdef DEBUG_FLOPPY
|
1073 | 19cb3738 | bellard | printf("No floppy (open delayed)\n");
|
1074 | 19cb3738 | bellard | #endif
|
1075 | 19cb3738 | bellard | return -EIO;
|
1076 | 19cb3738 | bellard | } |
1077 | 6dd2db52 | blueswir1 | s->fd = open(bs->filename, s->fd_open_flags); |
1078 | 19cb3738 | bellard | if (s->fd < 0) { |
1079 | 19cb3738 | bellard | s->fd_error_time = qemu_get_clock(rt_clock); |
1080 | 19cb3738 | bellard | s->fd_got_error = 1;
|
1081 | 19cb3738 | bellard | if (last_media_present)
|
1082 | 19cb3738 | bellard | s->fd_media_changed = 1;
|
1083 | 19cb3738 | bellard | #ifdef DEBUG_FLOPPY
|
1084 | 19cb3738 | bellard | printf("No floppy\n");
|
1085 | 19cb3738 | bellard | #endif
|
1086 | 19cb3738 | bellard | return -EIO;
|
1087 | 19cb3738 | bellard | } |
1088 | 19cb3738 | bellard | #ifdef DEBUG_FLOPPY
|
1089 | 19cb3738 | bellard | printf("Floppy opened\n");
|
1090 | 19cb3738 | bellard | #endif
|
1091 | 19cb3738 | bellard | } |
1092 | 19cb3738 | bellard | if (!last_media_present)
|
1093 | 19cb3738 | bellard | s->fd_media_changed = 1;
|
1094 | 19cb3738 | bellard | s->fd_open_time = qemu_get_clock(rt_clock); |
1095 | 19cb3738 | bellard | s->fd_got_error = 0;
|
1096 | 19cb3738 | bellard | return 0; |
1097 | 19cb3738 | bellard | } |
1098 | 19cb3738 | bellard | |
1099 | 19cb3738 | bellard | static int raw_is_inserted(BlockDriverState *bs) |
1100 | 19cb3738 | bellard | { |
1101 | 19cb3738 | bellard | BDRVRawState *s = bs->opaque; |
1102 | 19cb3738 | bellard | int ret;
|
1103 | 19cb3738 | bellard | |
1104 | 19cb3738 | bellard | switch(s->type) {
|
1105 | 19cb3738 | bellard | case FTYPE_CD:
|
1106 | 19cb3738 | bellard | ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); |
1107 | 19cb3738 | bellard | if (ret == CDS_DISC_OK)
|
1108 | 19cb3738 | bellard | return 1; |
1109 | 19cb3738 | bellard | else
|
1110 | 19cb3738 | bellard | return 0; |
1111 | 19cb3738 | bellard | break;
|
1112 | 19cb3738 | bellard | case FTYPE_FD:
|
1113 | 19cb3738 | bellard | ret = fd_open(bs); |
1114 | 19cb3738 | bellard | return (ret >= 0); |
1115 | 19cb3738 | bellard | default:
|
1116 | 19cb3738 | bellard | return 1; |
1117 | 19cb3738 | bellard | } |
1118 | 19cb3738 | bellard | } |
1119 | 19cb3738 | bellard | |
1120 | 19cb3738 | bellard | /* currently only used by fdc.c, but a CD version would be good too */
|
1121 | 19cb3738 | bellard | static int raw_media_changed(BlockDriverState *bs) |
1122 | 19cb3738 | bellard | { |
1123 | 19cb3738 | bellard | BDRVRawState *s = bs->opaque; |
1124 | 19cb3738 | bellard | |
1125 | 19cb3738 | bellard | switch(s->type) {
|
1126 | 19cb3738 | bellard | case FTYPE_FD:
|
1127 | 19cb3738 | bellard | { |
1128 | 19cb3738 | bellard | int ret;
|
1129 | 19cb3738 | bellard | /* XXX: we do not have a true media changed indication. It
|
1130 | 19cb3738 | bellard | does not work if the floppy is changed without trying
|
1131 | 19cb3738 | bellard | to read it */
|
1132 | 19cb3738 | bellard | fd_open(bs); |
1133 | 19cb3738 | bellard | ret = s->fd_media_changed; |
1134 | 19cb3738 | bellard | s->fd_media_changed = 0;
|
1135 | 19cb3738 | bellard | #ifdef DEBUG_FLOPPY
|
1136 | 19cb3738 | bellard | printf("Floppy changed=%d\n", ret);
|
1137 | 19cb3738 | bellard | #endif
|
1138 | 19cb3738 | bellard | return ret;
|
1139 | 19cb3738 | bellard | } |
1140 | 19cb3738 | bellard | default:
|
1141 | 19cb3738 | bellard | return -ENOTSUP;
|
1142 | 19cb3738 | bellard | } |
1143 | 19cb3738 | bellard | } |
1144 | 19cb3738 | bellard | |
1145 | 19cb3738 | bellard | static int raw_eject(BlockDriverState *bs, int eject_flag) |
1146 | 19cb3738 | bellard | { |
1147 | 19cb3738 | bellard | BDRVRawState *s = bs->opaque; |
1148 | 19cb3738 | bellard | |
1149 | 19cb3738 | bellard | switch(s->type) {
|
1150 | 19cb3738 | bellard | case FTYPE_CD:
|
1151 | 19cb3738 | bellard | if (eject_flag) {
|
1152 | 19cb3738 | bellard | if (ioctl (s->fd, CDROMEJECT, NULL) < 0) |
1153 | 19cb3738 | bellard | perror("CDROMEJECT");
|
1154 | 19cb3738 | bellard | } else {
|
1155 | 19cb3738 | bellard | if (ioctl (s->fd, CDROMCLOSETRAY, NULL) < 0) |
1156 | 19cb3738 | bellard | perror("CDROMEJECT");
|
1157 | 19cb3738 | bellard | } |
1158 | 19cb3738 | bellard | break;
|
1159 | 19cb3738 | bellard | case FTYPE_FD:
|
1160 | 19cb3738 | bellard | { |
1161 | 19cb3738 | bellard | int fd;
|
1162 | 19cb3738 | bellard | if (s->fd >= 0) { |
1163 | 19cb3738 | bellard | close(s->fd); |
1164 | 19cb3738 | bellard | s->fd = -1;
|
1165 | 53538725 | aliguori | raw_close_fd_pool(s); |
1166 | 19cb3738 | bellard | } |
1167 | 6dd2db52 | blueswir1 | fd = open(bs->filename, s->fd_open_flags | O_NONBLOCK); |
1168 | 19cb3738 | bellard | if (fd >= 0) { |
1169 | 19cb3738 | bellard | if (ioctl(fd, FDEJECT, 0) < 0) |
1170 | 19cb3738 | bellard | perror("FDEJECT");
|
1171 | 19cb3738 | bellard | close(fd); |
1172 | 19cb3738 | bellard | } |
1173 | 19cb3738 | bellard | } |
1174 | 19cb3738 | bellard | break;
|
1175 | 19cb3738 | bellard | default:
|
1176 | 19cb3738 | bellard | return -ENOTSUP;
|
1177 | 19cb3738 | bellard | } |
1178 | 19cb3738 | bellard | return 0; |
1179 | 19cb3738 | bellard | } |
1180 | 19cb3738 | bellard | |
1181 | 19cb3738 | bellard | static int raw_set_locked(BlockDriverState *bs, int locked) |
1182 | 19cb3738 | bellard | { |
1183 | 19cb3738 | bellard | BDRVRawState *s = bs->opaque; |
1184 | 19cb3738 | bellard | |
1185 | 19cb3738 | bellard | switch(s->type) {
|
1186 | 19cb3738 | bellard | case FTYPE_CD:
|
1187 | 19cb3738 | bellard | if (ioctl (s->fd, CDROM_LOCKDOOR, locked) < 0) { |
1188 | 19cb3738 | bellard | /* Note: an error can happen if the distribution automatically
|
1189 | 19cb3738 | bellard | mounts the CD-ROM */
|
1190 | 19cb3738 | bellard | // perror("CDROM_LOCKDOOR");
|
1191 | 19cb3738 | bellard | } |
1192 | 19cb3738 | bellard | break;
|
1193 | 19cb3738 | bellard | default:
|
1194 | 19cb3738 | bellard | return -ENOTSUP;
|
1195 | 19cb3738 | bellard | } |
1196 | 19cb3738 | bellard | return 0; |
1197 | 19cb3738 | bellard | } |
1198 | 19cb3738 | bellard | |
1199 | 985a03b0 | ths | static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
1200 | 985a03b0 | ths | { |
1201 | 985a03b0 | ths | BDRVRawState *s = bs->opaque; |
1202 | 985a03b0 | ths | |
1203 | 985a03b0 | ths | return ioctl(s->fd, req, buf);
|
1204 | 985a03b0 | ths | } |
1205 | 19cb3738 | bellard | #else
|
1206 | 19cb3738 | bellard | |
1207 | 08af02e2 | aliguori | static int fd_open(BlockDriverState *bs) |
1208 | 08af02e2 | aliguori | { |
1209 | 08af02e2 | aliguori | return 0; |
1210 | 08af02e2 | aliguori | } |
1211 | 08af02e2 | aliguori | |
1212 | 19cb3738 | bellard | static int raw_is_inserted(BlockDriverState *bs) |
1213 | 19cb3738 | bellard | { |
1214 | 19cb3738 | bellard | return 1; |
1215 | 19cb3738 | bellard | } |
1216 | 19cb3738 | bellard | |
1217 | 19cb3738 | bellard | static int raw_media_changed(BlockDriverState *bs) |
1218 | 19cb3738 | bellard | { |
1219 | 19cb3738 | bellard | return -ENOTSUP;
|
1220 | 19cb3738 | bellard | } |
1221 | 19cb3738 | bellard | |
1222 | 19cb3738 | bellard | static int raw_eject(BlockDriverState *bs, int eject_flag) |
1223 | 19cb3738 | bellard | { |
1224 | 19cb3738 | bellard | return -ENOTSUP;
|
1225 | 19cb3738 | bellard | } |
1226 | 19cb3738 | bellard | |
1227 | 19cb3738 | bellard | static int raw_set_locked(BlockDriverState *bs, int locked) |
1228 | 19cb3738 | bellard | { |
1229 | 19cb3738 | bellard | return -ENOTSUP;
|
1230 | 19cb3738 | bellard | } |
1231 | 19cb3738 | bellard | |
1232 | 985a03b0 | ths | static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
1233 | 985a03b0 | ths | { |
1234 | 985a03b0 | ths | return -ENOTSUP;
|
1235 | 985a03b0 | ths | } |
1236 | 19cb3738 | bellard | #endif /* !linux */ |
1237 | 19cb3738 | bellard | |
1238 | 19cb3738 | bellard | BlockDriver bdrv_host_device = { |
1239 | 19cb3738 | bellard | "host_device",
|
1240 | 19cb3738 | bellard | sizeof(BDRVRawState),
|
1241 | 19cb3738 | bellard | NULL, /* no probe for protocols */ |
1242 | 19cb3738 | bellard | hdev_open, |
1243 | 19cb3738 | bellard | NULL,
|
1244 | 19cb3738 | bellard | NULL,
|
1245 | 19cb3738 | bellard | raw_close, |
1246 | 19cb3738 | bellard | NULL,
|
1247 | 19cb3738 | bellard | raw_flush, |
1248 | 3b46e624 | ths | |
1249 | 414f0dab | blueswir1 | #ifdef CONFIG_AIO
|
1250 | 19cb3738 | bellard | .bdrv_aio_read = raw_aio_read, |
1251 | 19cb3738 | bellard | .bdrv_aio_write = raw_aio_write, |
1252 | 19cb3738 | bellard | .bdrv_aio_cancel = raw_aio_cancel, |
1253 | 19cb3738 | bellard | .aiocb_size = sizeof(RawAIOCB),
|
1254 | 414f0dab | blueswir1 | #endif
|
1255 | 19cb3738 | bellard | .bdrv_pread = raw_pread, |
1256 | 19cb3738 | bellard | .bdrv_pwrite = raw_pwrite, |
1257 | 19cb3738 | bellard | .bdrv_getlength = raw_getlength, |
1258 | 19cb3738 | bellard | |
1259 | 19cb3738 | bellard | /* removable device support */
|
1260 | 19cb3738 | bellard | .bdrv_is_inserted = raw_is_inserted, |
1261 | 19cb3738 | bellard | .bdrv_media_changed = raw_media_changed, |
1262 | 19cb3738 | bellard | .bdrv_eject = raw_eject, |
1263 | 19cb3738 | bellard | .bdrv_set_locked = raw_set_locked, |
1264 | 985a03b0 | ths | /* generic scsi device */
|
1265 | 985a03b0 | ths | .bdrv_ioctl = raw_ioctl, |
1266 | 19cb3738 | bellard | }; |