diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/raw-posix.c | 38 | ||||
| -rw-r--r-- | block/raw-win32.c | 43 |
2 files changed, 47 insertions, 34 deletions
diff --git a/block/raw-posix.c b/block/raw-posix.c index 5981d04..155205f 100644 --- a/block/raw-posix.c +++ b/block/raw-posix.c @@ -185,6 +185,28 @@ static int raw_normalize_devicepath(const char **filename) } #endif +static void raw_parse_flags(int bdrv_flags, int *open_flags) +{ + assert(open_flags != NULL); + + *open_flags |= O_BINARY; + *open_flags &= ~O_ACCMODE; + if (bdrv_flags & BDRV_O_RDWR) { + *open_flags |= O_RDWR; + } else { + *open_flags |= O_RDONLY; + } + + /* Use O_DSYNC for write-through caching, no flags for write-back caching, + * and O_DIRECT for no caching. */ + if ((bdrv_flags & BDRV_O_NOCACHE)) { + *open_flags |= O_DIRECT; + } + if (!(bdrv_flags & BDRV_O_CACHE_WB)) { + *open_flags |= O_DSYNC; + } +} + #ifdef CONFIG_LINUX_AIO static int raw_set_aio(void **aio_ctx, int *use_aio, int bdrv_flags) { @@ -228,20 +250,8 @@ static int raw_open_common(BlockDriverState *bs, const char *filename, return ret; } - s->open_flags = open_flags | O_BINARY; - s->open_flags &= ~O_ACCMODE; - if (bdrv_flags & BDRV_O_RDWR) { - s->open_flags |= O_RDWR; - } else { - s->open_flags |= O_RDONLY; - } - - /* Use O_DSYNC for write-through caching, no flags for write-back caching, - * and O_DIRECT for no caching. */ - if ((bdrv_flags & BDRV_O_NOCACHE)) - s->open_flags |= O_DIRECT; - if (!(bdrv_flags & BDRV_O_CACHE_WB)) - s->open_flags |= O_DSYNC; + s->open_flags = open_flags; + raw_parse_flags(bdrv_flags, &s->open_flags); s->fd = -1; fd = qemu_open(filename, s->open_flags, 0644); diff --git a/block/raw-win32.c b/block/raw-win32.c index c56bf83..335c06a 100644 --- a/block/raw-win32.c +++ b/block/raw-win32.c @@ -77,6 +77,26 @@ static int set_sparse(int fd) NULL, 0, NULL, 0, &returned, NULL); } +static void raw_parse_flags(int flags, int *access_flags, DWORD *overlapped) +{ + assert(access_flags != NULL); + assert(overlapped != NULL); + + if (flags & BDRV_O_RDWR) { + *access_flags = GENERIC_READ | GENERIC_WRITE; + } else { + *access_flags = GENERIC_READ; + } + + *overlapped = FILE_ATTRIBUTE_NORMAL; + if (flags & BDRV_O_NOCACHE) { + *overlapped |= FILE_FLAG_NO_BUFFERING; + } + if (!(flags & BDRV_O_CACHE_WB)) { + *overlapped |= FILE_FLAG_WRITE_THROUGH; + } +} + static int raw_open(BlockDriverState *bs, const char *filename, int flags) { BDRVRawState *s = bs->opaque; @@ -85,17 +105,8 @@ static int raw_open(BlockDriverState *bs, const char *filename, int flags) s->type = FTYPE_FILE; - if (flags & BDRV_O_RDWR) { - access_flags = GENERIC_READ | GENERIC_WRITE; - } else { - access_flags = GENERIC_READ; - } + raw_parse_flags(flags, &access_flags, &overlapped); - overlapped = FILE_ATTRIBUTE_NORMAL; - if (flags & BDRV_O_NOCACHE) - overlapped |= FILE_FLAG_NO_BUFFERING; - if (!(flags & BDRV_O_CACHE_WB)) - overlapped |= FILE_FLAG_WRITE_THROUGH; s->hfile = CreateFile(filename, access_flags, FILE_SHARE_READ, NULL, OPEN_EXISTING, overlapped, NULL); @@ -374,18 +385,10 @@ static int hdev_open(BlockDriverState *bs, const char *filename, int flags) } s->type = find_device_type(bs, filename); - if (flags & BDRV_O_RDWR) { - access_flags = GENERIC_READ | GENERIC_WRITE; - } else { - access_flags = GENERIC_READ; - } + raw_parse_flags(flags, &access_flags, &overlapped); + create_flags = OPEN_EXISTING; - overlapped = FILE_ATTRIBUTE_NORMAL; - if (flags & BDRV_O_NOCACHE) - overlapped |= FILE_FLAG_NO_BUFFERING; - if (!(flags & BDRV_O_CACHE_WB)) - overlapped |= FILE_FLAG_WRITE_THROUGH; s->hfile = CreateFile(filename, access_flags, FILE_SHARE_READ, NULL, create_flags, overlapped, NULL); |