diff options
| author | Nikolay Aleksandrov <razor@blackwall.org> | 2022-04-13 13:51:55 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-04-13 12:46:26 +0100 |
| commit | a6cec0bcd34264be8887791594be793b3f12719f (patch) | |
| tree | b7da7e285081c96a18e5bf32b8feda15f3f56a3d /net | |
| parent | 545528d788556c724eeb5400757f828ef27782a8 (diff) | |
net: rtnetlink: add bulk delete support flag
Add a new rtnl flag (RTNL_FLAG_BULK_DEL_SUPPORTED) which is used to
verify that the delete operation allows bulk object deletion. Also emit
a warning if anyone tries to set it for non-delete kind.
Suggested-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/rtnetlink.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index beda4a7da062..63c7df52a667 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -249,6 +249,8 @@ static int rtnl_register_internal(struct module *owner, if (dumpit) link->dumpit = dumpit; + WARN_ON(rtnl_msgtype_kind(msgtype) != RTNL_KIND_DEL && + (flags & RTNL_FLAG_BULK_DEL_SUPPORTED)); link->flags |= flags; /* publish protocol:msgtype */ @@ -6009,6 +6011,12 @@ static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, } flags = link->flags; + if (kind == RTNL_KIND_DEL && (nlh->nlmsg_flags & NLM_F_BULK) && + !(flags & RTNL_FLAG_BULK_DEL_SUPPORTED)) { + NL_SET_ERR_MSG(extack, "Bulk delete is not supported"); + goto err_unlock; + } + if (flags & RTNL_FLAG_DOIT_UNLOCKED) { doit = link->doit; rcu_read_unlock(); |