diff options
| author | Carolina Jubran <cjubran@nvidia.com> | 2025-06-29 17:21:31 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-07-03 01:39:04 +0300 |
| commit | 42401c42389622424f2973ec57414f033ae6be8f (patch) | |
| tree | 227374c1eb3268a3cf0c246d75708abb8fce2e32 /include | |
| parent | 97b2409f28e0d69e5ab62df0798be8bd744a770f (diff) | |
| download | linux-42401c42389622424f2973ec57414f033ae6be8f.tar.xz | |
netlink: introduce type-checking attribute iteration for nlmsg
Add the nlmsg_for_each_attr_type() macro to simplify iteration over
attributes of a specific type in a Netlink message.
Convert existing users in vxlan and nfsd to use the new macro.
Suggested-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Carolina Jubran <cjubran@nvidia.com>
Signed-off-by: Mark Bloch <mbloch@nvidia.com>
Link: https://patch.msgid.link/20250629142138.361537-2-mbloch@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/netlink.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/net/netlink.h b/include/net/netlink.h index 90a560dc167a..1a8356ca4b78 100644 --- a/include/net/netlink.h +++ b/include/net/netlink.h @@ -68,6 +68,8 @@ * nlmsg_for_each_msg() loop over all messages * nlmsg_validate() validate netlink message incl. attrs * nlmsg_for_each_attr() loop over all attributes + * nlmsg_for_each_attr_type() loop over all attributes with the + * given type * * Misc: * nlmsg_report() report back to application? @@ -967,6 +969,18 @@ static inline u32 nlmsg_seq(const struct nlmsghdr *nlh) nlmsg_attrlen(nlh, hdrlen), rem) /** + * nlmsg_for_each_attr_type - iterate over a stream of attributes + * @pos: loop counter, set to the current attribute + * @type: required attribute type for @pos + * @nlh: netlink message header + * @hdrlen: length of the family specific header + * @rem: initialized to len, holds bytes currently remaining in stream + */ +#define nlmsg_for_each_attr_type(pos, type, nlh, hdrlen, rem) \ + nlmsg_for_each_attr(pos, nlh, hdrlen, rem) \ + if (nla_type(pos) == type) + +/** * nlmsg_put - Add a new netlink message to an skb * @skb: socket buffer to store message in * @portid: netlink PORTID of requesting application |