Revision 6a8dc042 block/raw-posix.c
| b/block/raw-posix.c | ||
|---|---|---|
| 185 | 185 |
} |
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#endif |
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static void raw_parse_flags(int bdrv_flags, int *open_flags) |
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{
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assert(open_flags != NULL); |
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*open_flags |= O_BINARY; |
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*open_flags &= ~O_ACCMODE; |
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if (bdrv_flags & BDRV_O_RDWR) {
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*open_flags |= O_RDWR; |
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} else {
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*open_flags |= O_RDONLY; |
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} |
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/* Use O_DSYNC for write-through caching, no flags for write-back caching, |
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* and O_DIRECT for no caching. */ |
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if ((bdrv_flags & BDRV_O_NOCACHE)) {
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*open_flags |= O_DIRECT; |
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} |
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if (!(bdrv_flags & BDRV_O_CACHE_WB)) {
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*open_flags |= O_DSYNC; |
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} |
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} |
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| 188 | 210 |
#ifdef CONFIG_LINUX_AIO |
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static int raw_set_aio(void **aio_ctx, int *use_aio, int bdrv_flags) |
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{
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| ... | ... | |
| 228 | 250 |
return ret; |
| 229 | 251 |
} |
| 230 | 252 |
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s->open_flags = open_flags | O_BINARY; |
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s->open_flags &= ~O_ACCMODE; |
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if (bdrv_flags & BDRV_O_RDWR) {
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s->open_flags |= O_RDWR; |
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} else {
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s->open_flags |= O_RDONLY; |
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} |
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/* Use O_DSYNC for write-through caching, no flags for write-back caching, |
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* and O_DIRECT for no caching. */ |
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if ((bdrv_flags & BDRV_O_NOCACHE)) |
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s->open_flags |= O_DIRECT; |
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if (!(bdrv_flags & BDRV_O_CACHE_WB)) |
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s->open_flags |= O_DSYNC; |
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s->open_flags = open_flags; |
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raw_parse_flags(bdrv_flags, &s->open_flags); |
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| 245 | 255 |
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| 246 | 256 |
s->fd = -1; |
| 247 | 257 |
fd = qemu_open(filename, s->open_flags, 0644); |
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