kernel/linux.git/include/linux/netlink.h, branch v6.6.132

rtnetlink: add RTNL_FLAG_DUMP_UNLOCKED flag

2024-10-17T13:24:29+00:00

[ Upstream commit 386520e0ecc01004d3a29c70c5a77d4bbf8a8420 ] Similarly to RTNL_FLAG_DOIT_UNLOCKED, this new flag allows dump operations registered via rtnl_register() or rtnl_register_module() to opt-out from RTNL protection. Signed-off-by: Eric Dumazet Reviewed-by: Donald Hunter Signed-off-by: David S. Miller Stable-dep-of: 5be2062e3080 ("mpls: Handle error of rtnl_register_module().") Signed-off-by: Sasha Levin

netlink: Add new netlink_release function

2023-07-23T10:34:22+00:00

A new function netlink_release is added in netlink_sock to store the protocol's release function. This is called when the socket is deleted. This can be supplied by the protocol via the release function in netlink_kernel_cfg. This is being added for the NETLINK_CONNECTOR protocol, so it can free it's data when socket is deleted. Signed-off-by: Anjali Kulkarni Reviewed-by: Liam R. Howlett Acked-by: Jakub Kicinski Signed-off-by: David S. Miller

netlink: Reverse the patch which removed filtering

2023-07-23T10:34:22+00:00

To use filtering at the connector & cn_proc layers, we need to enable filtering in the netlink layer. This reverses the patch which removed netlink filtering - commit ID for that patch: 549017aa1bb7 (netlink: remove netlink_broadcast_filtered). Signed-off-by: Anjali Kulkarni Reviewed-by: Liam R. Howlett Acked-by: Jakub Kicinski Signed-off-by: David S. Miller

netlink: support extack in dump ->start()

2023-06-12T10:32:44+00:00

Commit 4a19edb60d02 ("netlink: Pass extack to dump handlers") added extack support to netlink dumps. It was focused on rtnl and since rtnl does not use ->start(), ->done() callbacks it ignored those. Genetlink on the other hand uses ->start() extensively, for parsing and input validation. Pass the extact in via struct netlink_dump_control and link it to cb for the time of ->start(). Both struct netlink_dump_control and extack itself live on the stack so we can't keep the same extack for the duration of the dump. This means that the extack visible in ->start() and each ->dump() callbacks will be different. Corner cases like reporting a warning message in DONE across dump calls are still not supported. We could put the extack (for dumps) in the socket struct, but layering makes it slightly awkward (extack pointer is decided before the DO / DUMP split). The genetlink dump error extacks are now surfaced: $ cli.py --spec netlink/specs/ethtool.yaml --dump channels-get lib.ynl.NlError: Netlink error: Invalid argument nl_len = 64 (48) nl_flags = 0x300 nl_type = 2 error: -22 extack: {'msg': 'request header missing'} Previously extack was missing: $ cli.py --spec netlink/specs/ethtool.yaml --dump channels-get lib.ynl.NlError: Netlink error: Invalid argument nl_len = 36 (20) nl_flags = 0x100 nl_type = 2 error: -22 Signed-off-by: Jakub Kicinski Signed-off-by: David S. Miller

netlink: Add a macro to set policy message with format string

2023-03-28T02:49:58+00:00

Similar to NL_SET_ERR_MSG_FMT, add a macro which sets netlink policy error message with a format string. Signed-off-by: Shay Agroskin Signed-off-by: Jakub Kicinski

netlink: remove unused 'compare' function

2023-03-10T07:11:09+00:00

No users in the tree. Tested with allmodconfig build. Signed-off-by: Florian Westphal Link: https://lore.kernel.org/r/20230308142006.20879-1-fw@strlen.de Signed-off-by: Jakub Kicinski

netlink: provide an ability to set default extack message

2023-02-02T05:04:09+00:00

In netdev common pattern, extack pointer is forwarded to the drivers to be filled with error message. However, the caller can easily overwrite the filled message. Instead of adding multiple "if (!extack->_msg)" checks before any NL_SET_ERR_MSG() call, which appears after call to the driver, let's add new macro to common code. [1] https://lore.kernel.org/all/Y9Irgrgf3uxOjwUm@unreal Reviewed-by: Simon Horman Reviewed-by: Nikolay Aleksandrov Signed-off-by: Leon Romanovsky Link: https://lore.kernel.org/r/6993fac557a40a1973dfa0095107c3d03d40bec1.1675171790.git.leon@kernel.org Signed-off-by: Jakub Kicinski

netlink: fix spelling mistake in dump size assert

2023-01-25T00:29:11+00:00

Commit 2c7bc10d0f7b ("netlink: add macro for checking dump ctx size") misspelled the name of the assert as asset, missing an R. Reported-by: Ido Schimmel Reviewed-by: Ido Schimmel Link: https://lore.kernel.org/r/20230123222224.732338-1-kuba@kernel.org Signed-off-by: Jakub Kicinski

netlink: add macro for checking dump ctx size

2023-01-06T06:13:39+00:00

We encourage casting struct netlink_callback::ctx to a local struct (in a comment above the field). Provide a convenience macro for checking if the local struct fits into the ctx. Reviewed-by: Jacob Keller Reviewed-by: Jiri Pirko Signed-off-by: Jakub Kicinski

netlink: add support for formatted extack messages

2022-10-19T20:00:04+00:00

Include an 80-byte buffer in struct netlink_ext_ack that can be used for scnprintf()ed messages. This does mean that the resulting string can't be enumerated, translated etc. in the way NL_SET_ERR_MSG() was designed to allow. Signed-off-by: Edward Cree Reviewed-by: Jakub Kicinski Signed-off-by: Jakub Kicinski