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block: Rename BDRV_O_INCOMING to BDRV_O_INACTIVE

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Instead of covering only the state of images on the migration
destination before the migration is completed, the flag will also cover
the state of images on the migration source after completion. This
common state implies that the image is technically still open, but no
writes will happen and any cached contents will be reloaded from disk if
and when the image leaves this state.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Kevin Wolf 2016-01-13 15:56:06 +01:00
parent 23c88b2472
commit 04c01a5c8f
6 changed files with 14 additions and 14 deletions
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10
block.c
View File

@ -1191,7 +1191,7 @@ static int bdrv_fill_options(QDict **options, const char *filename,
}
if (runstate_check(RUN_STATE_INMIGRATE)) {
*flags |= BDRV_O_INCOMING;
*flags |= BDRV_O_INACTIVE;
}
return 0;
@ -3261,10 +3261,10 @@ void bdrv_invalidate_cache(BlockDriverState *bs, Error **errp)
return;
}
if (!(bs->open_flags & BDRV_O_INCOMING)) {
if (!(bs->open_flags & BDRV_O_INACTIVE)) {
return;
}
bs->open_flags &= ~BDRV_O_INCOMING;
bs->open_flags &= ~BDRV_O_INACTIVE;
if (bs->drv->bdrv_invalidate_cache) {
bs->drv->bdrv_invalidate_cache(bs, &local_err);
@ -3272,14 +3272,14 @@ void bdrv_invalidate_cache(BlockDriverState *bs, Error **errp)
bdrv_invalidate_cache(bs->file->bs, &local_err);
}
if (local_err) {
bs->open_flags |= BDRV_O_INCOMING;
bs->open_flags |= BDRV_O_INACTIVE;
error_propagate(errp, local_err);
return;
}
ret = refresh_total_sectors(bs, bs->total_sectors);
if (ret < 0) {
bs->open_flags |= BDRV_O_INCOMING;
bs->open_flags |= BDRV_O_INACTIVE;
error_setg_errno(errp, -ret, "Could not refresh total sector count");
return;
}

4
block/io.c
View File

@ -1301,7 +1301,7 @@ static int coroutine_fn bdrv_co_do_pwritev(BlockDriverState *bs,
if (bs->read_only) {
return -EPERM;
}
assert(!(bs->open_flags & BDRV_O_INCOMING));
assert(!(bs->open_flags & BDRV_O_INACTIVE));
ret = bdrv_check_byte_request(bs, offset, bytes);
if (ret < 0) {
@ -2463,7 +2463,7 @@ int coroutine_fn bdrv_co_discard(BlockDriverState *bs, int64_t sector_num,
} else if (bs->read_only) {
return -EPERM;
}
assert(!(bs->open_flags & BDRV_O_INCOMING));
assert(!(bs->open_flags & BDRV_O_INACTIVE));
/* Do nothing if disabled. */
if (!(bs->open_flags & BDRV_O_UNMAP)) {

6
block/qcow2.c
View File

@ -1141,7 +1141,7 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
}
/* Clear unknown autoclear feature bits */
if (!bs->read_only && !(flags & BDRV_O_INCOMING) && s->autoclear_features) {
if (!bs->read_only && !(flags & BDRV_O_INACTIVE) && s->autoclear_features) {
s->autoclear_features = 0;
ret = qcow2_update_header(bs);
if (ret < 0) {
@ -1154,7 +1154,7 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
qemu_co_mutex_init(&s->lock);
/* Repair image if dirty */
if (!(flags & (BDRV_O_CHECK | BDRV_O_INCOMING)) && !bs->read_only &&
if (!(flags & (BDRV_O_CHECK | BDRV_O_INACTIVE)) && !bs->read_only &&
(s->incompatible_features & QCOW2_INCOMPAT_DIRTY)) {
BdrvCheckResult result = {0};
@ -1693,7 +1693,7 @@ static void qcow2_close(BlockDriverState *bs)
/* else pre-write overlap checks in cache_destroy may crash */
s->l1_table = NULL;
if (!(bs->open_flags & BDRV_O_INCOMING)) {
if (!(bs->open_flags & BDRV_O_INACTIVE)) {
int ret1, ret2;
ret1 = qcow2_cache_flush(bs, s->l2_table_cache);

4
block/qed.c
View File

@ -478,7 +478,7 @@ static int bdrv_qed_open(BlockDriverState *bs, QDict *options, int flags,
* feature is no longer valid.
*/
if ((s->header.autoclear_features & ~QED_AUTOCLEAR_FEATURE_MASK) != 0 &&
!bdrv_is_read_only(bs->file->bs) && !(flags & BDRV_O_INCOMING)) {
!bdrv_is_read_only(bs->file->bs) && !(flags & BDRV_O_INACTIVE)) {
s->header.autoclear_features &= QED_AUTOCLEAR_FEATURE_MASK;
ret = qed_write_header_sync(s);
@ -506,7 +506,7 @@ static int bdrv_qed_open(BlockDriverState *bs, QDict *options, int flags,
* aid data recovery from an otherwise inconsistent image.
*/
if (!bdrv_is_read_only(bs->file->bs) &&
!(flags & BDRV_O_INCOMING)) {
!(flags & BDRV_O_INACTIVE)) {
BdrvCheckResult result = {0};
ret = qed_check(s, &result, true);

2
include/block/block.h
View File

@ -84,7 +84,7 @@ typedef struct HDGeometry {
#define BDRV_O_NO_BACKING 0x0100 /* don't open the backing file */
#define BDRV_O_NO_FLUSH 0x0200 /* disable flushing on this disk */
#define BDRV_O_COPY_ON_READ 0x0400 /* copy read backing sectors into image */
#define BDRV_O_INCOMING 0x0800 /* consistency hint for incoming migration */
#define BDRV_O_INACTIVE 0x0800 /* consistency hint for migration handoff */
#define BDRV_O_CHECK 0x1000 /* open solely for consistency check */
#define BDRV_O_ALLOW_RDWR 0x2000 /* allow reopen to change from r/o to r/w */
#define BDRV_O_UNMAP 0x4000 /* execute guest UNMAP/TRIM operations */

2
nbd/server.c
View File

@ -668,7 +668,7 @@ NBDExport *nbd_export_new(BlockBackend *blk, off_t dev_offset, off_t size,
blk_add_aio_context_notifier(blk, blk_aio_attached, blk_aio_detach, exp);
/*
* NBD exports are used for non-shared storage migration. Make sure
* that BDRV_O_INCOMING is cleared and the image is ready for write
* that BDRV_O_INACTIVE is cleared and the image is ready for write
* access since the export could be available before migration handover.
*/
blk_invalidate_cache(blk, NULL);