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blockjob: Add permissions to block_job_add_bdrv()

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Block jobs don't actually do I/O through the the reference they create
with block_job_add_bdrv(), but they might want to use the permisssion
system to express what the block job does to intermediate nodes. This
adds permissions to block_job_add_bdrv() to provide the means to request
permissions.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Acked-by: Fam Zheng <famz@redhat.com>
This commit is contained in:
Kevin Wolf 2017-01-17 11:56:42 +01:00
parent 26de9438c1
commit 76d554e20b
6 changed files with 53 additions and 13 deletions
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8
block/commit.c
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@ -267,13 +267,17 @@ void commit_start(const char *job_id, BlockDriverState *bs,
* disappear from the chain after this operation. */
assert(bdrv_chain_contains(top, base));
for (iter = top; iter != backing_bs(base); iter = backing_bs(iter)) {
block_job_add_bdrv(&s->common, iter);
/* FIXME Use real permissions */
block_job_add_bdrv(&s->common, "intermediate node", iter, 0,
BLK_PERM_ALL, &error_abort);
}
/* overlay_bs must be blocked because it needs to be modified to
* update the backing image string, but if it's the root node then
* don't block it again */
if (bs != overlay_bs) {
block_job_add_bdrv(&s->common, overlay_bs);
/* FIXME Use real permissions */
block_job_add_bdrv(&s->common, "overlay of top", overlay_bs, 0,
BLK_PERM_ALL, &error_abort);
}
/* FIXME Use real permissions */