[IB] uverbs: Add a mask of device methods allowed for userspace

Give each device a uverbs_cmd_mask, so that a low-level driver can
control which methods may be called on behalf of userspace.

Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c
index 3a887006b25..6a5e5084db7 100644
--- a/drivers/infiniband/core/uverbs_main.c
+++ b/drivers/infiniband/core/uverbs_main.c
@@ -514,7 +514,8 @@ static ssize_t ib_uverbs_write(struct file *filp, const char __user *buf,
 
         if (hdr.command < 0                             ||
             hdr.command >= ARRAY_SIZE(uverbs_cmd_table) ||
-            !uverbs_cmd_table[hdr.command])
+            !uverbs_cmd_table[hdr.command]              ||
+            !(file->device->ib_dev->uverbs_cmd_mask & (1ull << hdr.command)))
                 return -EINVAL;
 
         if (!file->ucontext &&