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block: Always set writeback mode in blk_new_open() 

All callers of blk_new_open() either don't rely on the WCE bit set after
blk_new_open() because they explicitly set it anyway, or they pass
BDRV_O_CACHE_WB unconditionally.

This patch changes blk_new_open() so that it always enables writeback
mode and asserts that BDRV_O_CACHE_WB is clear. For those callers that
used to pass BDRV_O_CACHE_WB unconditionally, the flag is removed now.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
master
Kevin Wolf 2016-03-15 14:34:37 +01:00
parent e4b24b497e
commit 72e775c7d9
12 changed files with 20 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
block/block-backend.c
View File

@ -148,6 +148,8 @@ BlockBackend *blk_new_open(const char *filename, const char *reference,
BlockBackend *blk;
int ret;
assert((flags & BDRV_O_CACHE_WB) == 0);
blk = blk_new_with_bs(errp);
if (!blk) {
QDECREF(options);
@ -160,6 +162,8 @@ BlockBackend *blk_new_open(const char *filename, const char *reference,
return NULL;
}
blk_set_enable_write_cache(blk, true);
return blk;
}

3
block/crypto.c
View File

@ -121,8 +121,7 @@ static ssize_t block_crypto_init_func(QCryptoBlock *block,
}
data->blk = blk_new_open(data->filename, NULL, NULL,
BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL,
errp);
BDRV_O_RDWR | BDRV_O_PROTOCOL, errp);
if (!data->blk) {
return -1;
}

3
block/parallels.c
View File

@ -480,8 +480,7 @@ static int parallels_create(const char *filename, QemuOpts *opts, Error **errp)
}
file = blk_new_open(filename, NULL, NULL,
BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL,
&local_err);
BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
if (file == NULL) {
error_propagate(errp, local_err);
return -EIO;

3
block/qcow.c
View File

@ -804,8 +804,7 @@ static int qcow_create(const char *filename, QemuOpts *opts, Error **errp)
}
qcow_blk = blk_new_open(filename, NULL, NULL,
BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL,
&local_err);
BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
if (qcow_blk == NULL) {
error_propagate(errp, local_err);
ret = -EIO;

9
block/qcow2.c
View File

@ -2168,8 +2168,7 @@ static int qcow2_create2(const char *filename, int64_t total_size,
}
blk = blk_new_open(filename, NULL, NULL,
BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL,
&local_err);
BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
if (blk == NULL) {
error_propagate(errp, local_err);
return -EIO;
@ -2233,8 +2232,7 @@ static int qcow2_create2(const char *filename, int64_t total_size,
options = qdict_new();
qdict_put(options, "driver", qstring_from_str("qcow2"));
blk = blk_new_open(filename, NULL, options,
BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH,
&local_err);
BDRV_O_RDWR | BDRV_O_NO_FLUSH, &local_err);
if (blk == NULL) {
error_propagate(errp, local_err);
ret = -EIO;
@ -2295,8 +2293,7 @@ static int qcow2_create2(const char *filename, int64_t total_size,
options = qdict_new();
qdict_put(options, "driver", qstring_from_str("qcow2"));
blk = blk_new_open(filename, NULL, options,
BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_NO_BACKING,
&local_err);
BDRV_O_RDWR | BDRV_O_NO_BACKING, &local_err);
if (blk == NULL) {
error_propagate(errp, local_err);
ret = -EIO;

3
block/qed.c
View File

@ -576,8 +576,7 @@ static int qed_create(const char *filename, uint32_t cluster_size,
}
blk = blk_new_open(filename, NULL, NULL,
BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL,
&local_err);
BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
if (blk == NULL) {
error_propagate(errp, local_err);
return -EIO;

5
block/sheepdog.c
View File

@ -1648,8 +1648,7 @@ static int sd_prealloc(const char *filename, Error **errp)
int ret;
blk = blk_new_open(filename, NULL, NULL,
BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL,
errp);
BDRV_O_RDWR | BDRV_O_PROTOCOL, errp);
if (blk == NULL) {
ret = -EIO;
goto out_with_err_set;
@ -1845,7 +1844,7 @@ static int sd_create(const char *filename, QemuOpts *opts,
}
blk = blk_new_open(backing_file, NULL, NULL,
BDRV_O_PROTOCOL | BDRV_O_CACHE_WB, errp);
BDRV_O_PROTOCOL, errp);
if (blk == NULL) {
ret = -EIO;
goto out;

3
block/vdi.c
View File

@ -770,8 +770,7 @@ static int vdi_create(const char *filename, QemuOpts *opts, Error **errp)
}
blk = blk_new_open(filename, NULL, NULL,
BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL,
&local_err);
BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
if (blk == NULL) {
error_propagate(errp, local_err);
ret = -EIO;

3
block/vhdx.c
View File

@ -1840,8 +1840,7 @@ static int vhdx_create(const char *filename, QemuOpts *opts, Error **errp)
}
blk = blk_new_open(filename, NULL, NULL,
BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL,
&local_err);
BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
if (blk == NULL) {
error_propagate(errp, local_err);
ret = -EIO;

8
block/vmdk.c
View File

@ -1663,8 +1663,7 @@ static int vmdk_create_extent(const char *filename, int64_t filesize,
}
blk = blk_new_open(filename, NULL, NULL,
BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL,
&local_err);
BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
if (blk == NULL) {
error_propagate(errp, local_err);
ret = -EIO;
@ -1948,7 +1947,7 @@ static int vmdk_create(const char *filename, QemuOpts *opts, Error **errp)
}
blk = blk_new_open(full_backing, NULL, NULL,
BDRV_O_NO_BACKING | BDRV_O_CACHE_WB, errp);
BDRV_O_NO_BACKING, errp);
g_free(full_backing);
if (blk == NULL) {
ret = -EIO;
@ -2020,8 +2019,7 @@ static int vmdk_create(const char *filename, QemuOpts *opts, Error **errp)
}
new_blk = blk_new_open(filename, NULL, NULL,
BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL,
&local_err);
BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
if (new_blk == NULL) {
error_propagate(errp, local_err);
ret = -EIO;

3
block/vpc.c
View File

@ -890,8 +890,7 @@ static int vpc_create(const char *filename, QemuOpts *opts, Error **errp)
}
blk = blk_new_open(filename, NULL, NULL,
BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL,
&local_err);
BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
if (blk == NULL) {
error_propagate(errp, local_err);
ret = -EIO;

1
blockdev.c
View File

@ -598,6 +598,7 @@ static BlockBackend *blockdev_init(const char *file, QDict *bs_opts,
qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_WB, writethrough ? "off" : "on");
qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off");
qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off");
assert((bdrv_flags & BDRV_O_CACHE_MASK) == 0);
if (runstate_check(RUN_STATE_INMIGRATE)) {
bdrv_flags |= BDRV_O_INACTIVE;