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IB/uverbs: Lower the test for ongoing disassociation

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Commands that are reading/writing to objects can test for an ongoing
disassociation during their initial call to rdma_lookup_get_uobject.  This
directly prevents all of these commands from conflicting with an ongoing
disassociation.

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Jason Gunthorpe 2018-07-25 21:40:16 -06:00
parent 1e857e65d4
commit cc2e14e680
1 changed files with 11 additions and 0 deletions
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11
drivers/infiniband/core/rdma_core.c
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@ -449,6 +449,17 @@ struct ib_uobject *rdma_lookup_get_uobject(const struct uverbs_obj_type *type,
goto free; goto free;
} }
/*
* If we have been disassociated block every command except for
* DESTROY based commands.
*/
if (mode != UVERBS_LOOKUP_DESTROY &&
!srcu_dereference(ufile->device->ib_dev,
&ufile->device->disassociate_srcu)) {
ret = -EIO;
goto free;
}
ret = uverbs_try_lock_object(uobj, mode); ret = uverbs_try_lock_object(uobj, mode);
if (ret) if (ret)
goto free; goto free;