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block: Add error parameter to blk_insert_bs()

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Now that blk_insert_bs() requests the BlockBackend permissions for the
node it attaches to, it can fail. Instead of aborting, pass the errors
to the callers.

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 2017-01-13 19:02:32 +01:00
parent 6d0eb64d5c
commit d7086422b1
14 changed files with 100 additions and 29 deletions
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6
nbd/server.c
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@ -891,10 +891,14 @@ NBDExport *nbd_export_new(BlockDriverState *bs, off_t dev_offset, off_t size,
{
BlockBackend *blk;
NBDExport *exp = g_malloc0(sizeof(NBDExport));
int ret;
/* FIXME Use real permissions */
blk = blk_new(0, BLK_PERM_ALL);
blk_insert_bs(blk, bs);
ret = blk_insert_bs(blk, bs, errp);
if (ret < 0) {
goto fail;
}
blk_set_enable_write_cache(blk, !writethrough);
exp->refcount = 1;