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block: do not parse BDRV_O_CACHE_WB in block drivers

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Block drivers should ignore BDRV_O_CACHE_WB in .bdrv_open flags,
and in the bs->open_flags.

This patch removes the code, leaving the behaviour behind as if
BDRV_O_CACHE_WB was set.

Signed-off-by: Jeff Cody <jcody@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Jeff Cody 2012-09-20 15:13:22 -04:00 committed by Kevin Wolf
parent 6a8dc0422e
commit 39c9fb9565
5 changed files with 6 additions and 24 deletions
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4
block/iscsi.c
View File

@ -268,10 +268,6 @@ iscsi_aio_writev(BlockDriverState *bs, int64_t sector_num,
acb->task->xfer_dir = SCSI_XFER_WRITE;
acb->task->cdb_size = 16;
acb->task->cdb[0] = 0x8a;
if (!(bs->open_flags & BDRV_O_CACHE_WB)) {
/* set FUA on writes when cache mode is write through */
acb->task->cdb[1] |= 0x04;
}
lba = sector_qemu2lun(sector_num, iscsilun);
*(uint32_t *)&acb->task->cdb[2] = htonl(lba >> 32);
*(uint32_t *)&acb->task->cdb[6] = htonl(lba & 0xffffffff);

3
block/raw-posix.c
View File

@ -202,9 +202,6 @@ static void raw_parse_flags(int bdrv_flags, int *open_flags)
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

3
block/raw-win32.c
View File

@ -92,9 +92,6 @@ static void raw_parse_flags(int flags, int *access_flags, DWORD *overlapped)
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)

6
block/rbd.c
View File

@ -487,12 +487,6 @@ static int qemu_rbd_open(BlockDriverState *bs, const char *filename, int flags)
rados_conf_set(s->cluster, "rbd_cache", "false");
} else {
rados_conf_set(s->cluster, "rbd_cache", "true");
if (!(flags & BDRV_O_CACHE_WB)) {
r = rados_conf_set(s->cluster, "rbd_cache_max_dirty", "0");
if (r < 0) {
rados_conf_set(s->cluster, "rbd_cache", "false");
}
}
}
if (strstr(conf, "conf=") == NULL) {

14
block/sheepdog.c
View File

@ -1114,14 +1114,12 @@ static int sd_open(BlockDriverState *bs, const char *filename, int flags)
goto out;
}
if (flags & BDRV_O_CACHE_WB) {
s->cache_enabled = 1;
s->flush_fd = connect_to_sdog(s->addr, s->port);
if (s->flush_fd < 0) {
error_report("failed to connect");
ret = s->flush_fd;
goto out;
}
s->cache_enabled = 1;
s->flush_fd = connect_to_sdog(s->addr, s->port);
if (s->flush_fd < 0) {
error_report("failed to connect");
ret = s->flush_fd;
goto out;
}
if (snapid || tag[0] != '\0') {