Fam's image locking series introduced some special-casing in the file-posix
driver that avoids taking locks when the image is inactive. While this works,
it really isn't the job of the file-posix driver, but the core block layer
should consider that inactive nodes require a lot less permissions.
This series integrates op blockers with bdrv_inactivate/invalidate_cache() to
solve this problem gennerically, and removes the workaround in file-posix.
Kevin Wolf (6):
migration: Unify block node activation error handling
block: New BdrvChildRole.activate() for blk_resume_after_migration()
block: Drop permissions when migration completes
block: Inactivate parents before children
block: Fix write/resize permissions for inactive images
file-posix: Remove .bdrv_inactivate/invalidate_cache
block.c | 76 ++++++++++++++++++++++++++++++++++++++++----
block/block-backend.c | 81 +++++++++++++++++++++++++++++++----------------
block/file-posix.c | 33 -------------------
include/block/block.h | 3 +-
include/block/block_int.h | 6 ++++
migration/migration.c | 13 ++------
migration/savevm.c | 9 ++----
qmp.c | 18 ++++-------
8 files changed, 139 insertions(+), 100 deletions(-)
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1.8.3.1