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[Qemu-block] [PATCH v14 03/20] block: Respect "force-shared-write" in pe
From: |
Fam Zheng |
Subject: |
[Qemu-block] [PATCH v14 03/20] block: Respect "force-shared-write" in perm propagating |
Date: |
Fri, 21 Apr 2017 11:55:49 +0800 |
Signed-off-by: Fam Zheng <address@hidden>
---
block.c | 31 +++++++++++++++++++++++--------
1 file changed, 23 insertions(+), 8 deletions(-)
diff --git a/block.c b/block.c
index f5c4e97..6acf618 100644
--- a/block.c
+++ b/block.c
@@ -1422,6 +1422,21 @@ static int bdrv_child_check_perm(BdrvChild *c, uint64_t
perm, uint64_t shared,
static void bdrv_child_abort_perm_update(BdrvChild *c);
static void bdrv_child_set_perm(BdrvChild *c, uint64_t perm, uint64_t shared);
+static void bdrv_child_perm(BlockDriverState *bs, BdrvChild *c,
+ const BdrvChildRole *role,
+ uint64_t parent_perm, uint64_t parent_shared,
+ uint64_t *nperm, uint64_t *nshared)
+{
+ if (bs->drv && bs->drv->bdrv_child_perm) {
+ bs->drv->bdrv_child_perm(bs, c, role,
+ parent_perm, parent_shared,
+ nperm, nshared);
+ }
+ if (bs->force_shared_write) {
+ *nshared |= BLK_PERM_WRITE;
+ }
+}
+
/*
* Check whether permissions on this node can be changed in a way that
* @cumulative_perms and @cumulative_shared_perms are the new cumulative
@@ -1466,9 +1481,9 @@ static int bdrv_check_perm(BlockDriverState *bs, uint64_t
cumulative_perms,
/* Check all children */
QLIST_FOREACH(c, &bs->children, next) {
uint64_t cur_perm, cur_shared;
- drv->bdrv_child_perm(bs, c, c->role,
- cumulative_perms, cumulative_shared_perms,
- &cur_perm, &cur_shared);
+ bdrv_child_perm(bs, c, c->role,
+ cumulative_perms, cumulative_shared_perms,
+ &cur_perm, &cur_shared);
ret = bdrv_child_check_perm(c, cur_perm, cur_shared, ignore_children,
errp);
if (ret < 0) {
@@ -1528,9 +1543,9 @@ static void bdrv_set_perm(BlockDriverState *bs, uint64_t
cumulative_perms,
/* Update all children */
QLIST_FOREACH(c, &bs->children, next) {
uint64_t cur_perm, cur_shared;
- drv->bdrv_child_perm(bs, c, c->role,
- cumulative_perms, cumulative_shared_perms,
- &cur_perm, &cur_shared);
+ bdrv_child_perm(bs, c, c->role,
+ cumulative_perms, cumulative_shared_perms,
+ &cur_perm, &cur_shared);
bdrv_child_set_perm(c, cur_perm, cur_shared);
}
}
@@ -1865,8 +1880,8 @@ BdrvChild *bdrv_attach_child(BlockDriverState *parent_bs,
assert(parent_bs->drv);
assert(bdrv_get_aio_context(parent_bs) == bdrv_get_aio_context(child_bs));
- parent_bs->drv->bdrv_child_perm(parent_bs, NULL, child_role,
- perm, shared_perm, &perm, &shared_perm);
+ bdrv_child_perm(parent_bs, NULL, child_role,
+ perm, shared_perm, &perm, &shared_perm);
child = bdrv_root_attach_child(child_bs, child_name, child_role,
perm, shared_perm, parent_bs, errp);
--
2.9.3
[Qemu-block] [PATCH v14 05/20] qemu-img: Update documentation for --share-rw, Fam Zheng, 2017/04/20