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RDMA/netlink: Add and implement doit netlink callback

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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@mellanox.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
This commit is contained in:
Leon Romanovsky 2017-06-15 12:46:33 +03:00 committed by Leon Romanovsky
parent ecc82c53f9
commit 1830ba21b9
2 changed files with 16 additions and 5 deletions
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19
drivers/infiniband/core/netlink.c
View File

@ -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;
}
@ -151,6 +155,7 @@ 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;
@ -169,10 +174,14 @@ 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);
}
/*

2
include/rdma/rdma_netlink.h
View File

@ -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;
};