From f87a0e29a9814a7ab6ee92b238989fed6186c4f3 Mon Sep 17 00:00:00 2001 From: Alberto Garcia Date: Thu, 15 Sep 2016 17:53:02 +0300 Subject: block: Add "read-only" to the options QDict This adds the "read-only" option to the QDict. One important effect of this change is that when a child inherits options from its parent, the existing "read-only" mode can be preserved if it was explicitly set previously. This addresses scenarios like this: [E] <- [D] <- [C] <- [B] <- [A] In this case, if we reopen [D] with read-only=off, and later reopen [B], then [D] will not inherit read-only=on from its parent during the bdrv_reopen_queue_child() stage. The BDRV_O_RDWR flag is not removed yet, but its keep in sync with the value of the "read-only" option. Signed-off-by: Alberto Garcia Signed-off-by: Kevin Wolf --- include/block/block.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/block') diff --git a/include/block/block.h b/include/block/block.h index f374e1a725..e18233afe0 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -107,6 +107,7 @@ typedef struct HDGeometry { #define BDRV_OPT_CACHE_WB "cache.writeback" #define BDRV_OPT_CACHE_DIRECT "cache.direct" #define BDRV_OPT_CACHE_NO_FLUSH "cache.no-flush" +#define BDRV_OPT_READ_ONLY "read-only" #define BDRV_SECTOR_BITS 9 -- cgit v1.2.3