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| author |   Jason Gunthorpe <jgg@mellanox.com> | 2018-07-25 21:40:14 -0600 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2018-08-01 14:55:48 -0600 |
| commit | 7452a3c745a2e7eb70d09dc5bb870759b1f26c91 (patch) | |
| tree | 6299209a46563a69fba8408baf3184f0e0d8df91 /drivers/infiniband/core/uverbs_ioctl.c | |
| parent | IB/uverbs: Convert 'bool exclusive' into an enum (diff) | |
| download | linux-dev-7452a3c745a2e7eb70d09dc5bb870759b1f26c91.tar.xz linux-dev-7452a3c745a2e7eb70d09dc5bb870759b1f26c91.zip | |
IB/uverbs: Allow RDMA_REMOVE_DESTROY to work concurrently with disassociate
After all the recent structural changes this is now straightfoward, hoist
the hw_destroy_rwsem up out of rdma_destroy_explicit and wrap it around
the uobject write lock as well as the destroy.
This is necessary as obtaining a write lock concurrently with
uverbs_destroy_ufile_hw() will cause malfunction.
After this change none of the destroy callbacks require the
disassociate_srcu lock to be correct.
This requires introducing a new lookup mode, UVERBS_LOOKUP_DESTROY as the
IOCTL interface needs to hold an unlocked kref until all command
verification is completed.
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/core/uverbs_ioctl.c')
| -rw-r--r-- | drivers/infiniband/core/uverbs_ioctl.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/infiniband/core/uverbs_ioctl.c b/drivers/infiniband/core/uverbs_ioctl.c index 404acfcdbeb2..f3776f909ca5 100644 --- a/drivers/infiniband/core/uverbs_ioctl.c +++ b/drivers/infiniband/core/uverbs_ioctl.c @@ -349,13 +349,18 @@ static int uverbs_handle_method(struct ib_uverbs_attr __user *uattr_ptr, * not get to manipulate the HW objects. */ if (destroy_attr) { - ret = rdma_explicit_destroy(destroy_attr->uobject); + ret = uobj_destroy(destroy_attr->uobject); if (ret) goto cleanup; } ret = method_spec->handler(ibdev, ufile, attr_bundle); + if (destroy_attr) { + uobj_put_destroy(destroy_attr->uobject); + destroy_attr->uobject = NULL; + } + cleanup: finalize_ret = uverbs_finalize_attrs(attr_bundle, method_spec->attr_buckets, |