[Qemu-devel] [PULL 01/25] replication: Fix replication open fail

[Kevin Wolf]

From: Wang Guang <address@hidden>

replication_child_perm request write
permissions for all child which will lead bdrv_check_perm fail.
replication_child_perm() should request write
permissions only if it is writable itself.

Signed-off-by: Wang Guang <address@hidden>
Signed-off-by: Wang Yong <address@hidden>
Reviewed-by: Xie Changlong <address@hidden>
Signed-off-by: Kevin Wolf <address@hidden>
---
 block/replication.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/block/replication.c b/block/replication.c
index 3a4e6822e4..1c95d673ff 100644
--- a/block/replication.c
+++ b/block/replication.c
@@ -161,10 +161,13 @@ static void replication_child_perm(BlockDriverState *bs, 
BdrvChild *c,
                                    uint64_t perm, uint64_t shared,
                                    uint64_t *nperm, uint64_t *nshared)
 {
-    *nperm = *nshared = BLK_PERM_CONSISTENT_READ \
-                        | BLK_PERM_WRITE \
-                        | BLK_PERM_WRITE_UNCHANGED;
-
+    *nperm = BLK_PERM_CONSISTENT_READ;
+    if ((bs->open_flags & (BDRV_O_INACTIVE | BDRV_O_RDWR)) == BDRV_O_RDWR) {
+        *nperm |= BLK_PERM_WRITE;
+    }
+    *nshared = BLK_PERM_CONSISTENT_READ \
+               | BLK_PERM_WRITE \
+               | BLK_PERM_WRITE_UNCHANGED;
     return;
 }
 
-- 
2.13.6