From: Leon Romanovsky <leonro@xxxxxxxxxxxx>
The .doit callback is used by netlink core to differentiate
between get and set operations. Common convention is to use
that call for command operations like (SET, ADD, e.t.c.) and/or
access without NLF_M_DUMP flag.
This commit adds proper declaration and implementation
to RDMA netlink.
Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxxxx>
Reviewed-by: Steve Wise <swise@xxxxxxxxxxxxxxxxxxxxx>
---
drivers/infiniband/core/netlink.c | 19 ++++++++++++++-----
include/rdma/rdma_netlink.h | 2 ++
2 files changed, 16 insertions(+), 5 deletions(-)
diff --git a/drivers/infiniband/core/netlink.c b/drivers/infiniband/core/netlink.c
index 2a88f92657fc..a5276bfc5909 100644
--- a/drivers/infiniband/core/netlink.c
+++ b/drivers/infiniband/core/netlink.c
@@ -76,9 +76,13 @@ static bool is_nl_msg_valid(unsigned int type, unsigned int op)
static bool is_nl_valid(unsigned int type, unsigned int op)
{
- if (!is_nl_msg_valid(type, op) ||
- !rdma_nl_types[type].cb_table ||
- !rdma_nl_types[type].cb_table[op].dump)
+ const struct rdma_nl_cbs *cb_table;
+
+ if (!is_nl_msg_valid(type, op))
+ return false;
+
+ cb_table = rdma_nl_types[type].cb_table;
+ if (!cb_table || (!cb_table[op].dump && !cb_table[op].doit))
return false;
return true;
}
@@ -153,6 +157,7 @@ static int rdma_nl_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
unsigned int op = RDMA_NL_GET_OP(type);
struct netlink_callback cb = {};
struct netlink_dump_control c = {};
+ int ret;
if (!is_nl_valid(index, op))
return -EINVAL;
@@ -171,10 +176,14 @@ static int rdma_nl_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
cb.nlh = nlh;
cb.dump = rdma_nl_types[index].cb_table[op].dump;
return cb.dump(skb, &cb);
+ } else {
+ c.dump = rdma_nl_types[index].cb_table[op].dump;
+ return netlink_dump_start(nls, skb, nlh, &c);
}
+ if (rdma_nl_types[index].cb_table[op].doit)
+ ret = rdma_nl_types[index].cb_table[op].doit(skb, nlh, extack);
+ return ret;
- c.dump = rdma_nl_types[index].cb_table[op].dump;
- return netlink_dump_start(nls, skb, nlh, &c);
}
/*
diff --git a/include/rdma/rdma_netlink.h b/include/rdma/rdma_netlink.h
index 92f8832297ab..e25bf1988846 100644
--- a/include/rdma/rdma_netlink.h
+++ b/include/rdma/rdma_netlink.h
@@ -6,6 +6,8 @@
#include <uapi/rdma/rdma_netlink.h>
struct rdma_nl_cbs {
+ int (*doit)(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct netlink_ext_ack *extack);
int (*dump)(struct sk_buff *skb, struct netlink_callback *nlcb);
u8 flags;
};
--
2.14.0
--
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