Only three families use info->userhdr today and going forward we discourage using fixed headers in new families. So having the pointer to user header in struct genl_info is an overkill. Compute the header pointer at runtime.
Reviewed-by: Johannes Berg <[email protected]> Reviewed-by: Jiri Pirko <[email protected]> Signed-off-by: Jakub Kicinski <[email protected]> --- CC: [email protected] CC: [email protected] CC: [email protected] CC: [email protected] CC: [email protected] CC: [email protected] CC: [email protected] CC: [email protected] CC: [email protected] CC: [email protected] CC: [email protected] CC: [email protected] --- drivers/block/drbd/drbd_nl.c | 9 +++++---- include/net/genetlink.h | 7 +++++-- net/netlink/genetlink.c | 1 - net/openvswitch/conntrack.c | 2 +- net/openvswitch/datapath.c | 29 ++++++++++++++++------------- net/openvswitch/meter.c | 10 +++++----- net/tipc/netlink_compat.c | 2 +- 7 files changed, 33 insertions(+), 27 deletions(-) diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c index cddae6f4b00f..d3538bd83fb3 100644 --- a/drivers/block/drbd/drbd_nl.c +++ b/drivers/block/drbd/drbd_nl.c @@ -159,7 +159,7 @@ static int drbd_msg_sprintf_info(struct sk_buff *skb, const char *fmt, ...) static int drbd_adm_prepare(struct drbd_config_context *adm_ctx, struct sk_buff *skb, struct genl_info *info, unsigned flags) { - struct drbd_genlmsghdr *d_in = info->userhdr; + struct drbd_genlmsghdr *d_in = genl_info_userhdr(info); const u8 cmd = info->genlhdr->cmd; int err; @@ -1396,8 +1396,9 @@ static void drbd_suspend_al(struct drbd_device *device) static bool should_set_defaults(struct genl_info *info) { - unsigned flags = ((struct drbd_genlmsghdr*)info->userhdr)->flags; - return 0 != (flags & DRBD_GENL_F_SET_DEFAULTS); + struct drbd_genlmsghdr *dh = genl_info_userhdr(info); + + return 0 != (dh->flags & DRBD_GENL_F_SET_DEFAULTS); } static unsigned int drbd_al_extents_max(struct drbd_backing_dev *bdev) @@ -4276,7 +4277,7 @@ static void device_to_info(struct device_info *info, int drbd_adm_new_minor(struct sk_buff *skb, struct genl_info *info) { struct drbd_config_context adm_ctx; - struct drbd_genlmsghdr *dh = info->userhdr; + struct drbd_genlmsghdr *dh = genl_info_userhdr(info); enum drbd_ret_code retcode; retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_RESOURCE); diff --git a/include/net/genetlink.h b/include/net/genetlink.h index 0366d0925596..9dc21ec15734 100644 --- a/include/net/genetlink.h +++ b/include/net/genetlink.h @@ -95,7 +95,6 @@ struct genl_family { * @snd_portid: netlink portid of sender * @nlhdr: netlink message header * @genlhdr: generic netlink message header - * @userhdr: user specific header * @attrs: netlink attributes * @_net: network namespace * @user_ptr: user pointers @@ -106,7 +105,6 @@ struct genl_info { u32 snd_portid; const struct nlmsghdr * nlhdr; struct genlmsghdr * genlhdr; - void * userhdr; struct nlattr ** attrs; possible_net_t _net; void * user_ptr[2]; @@ -123,6 +121,11 @@ static inline void genl_info_net_set(struct genl_info *info, struct net *net) write_pnet(&info->_net, net); } +static inline void *genl_info_userhdr(const struct genl_info *info) +{ + return (u8 *)info->genlhdr + GENL_HDRLEN; +} + #define GENL_SET_ERR_MSG(info, msg) NL_SET_ERR_MSG((info)->extack, msg) #define GENL_SET_ERR_MSG_FMT(info, msg, args...) \ diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c index 0d4285688ab9..f98f730bb245 100644 --- a/net/netlink/genetlink.c +++ b/net/netlink/genetlink.c @@ -943,7 +943,6 @@ static int genl_family_rcv_msg_doit(const struct genl_family *family, info.snd_portid = NETLINK_CB(skb).portid; info.nlhdr = nlh; info.genlhdr = nlmsg_data(nlh); - info.userhdr = nlmsg_data(nlh) + GENL_HDRLEN; info.attrs = attrbuf; info.extack = extack; genl_info_net_set(&info, net); diff --git a/net/openvswitch/conntrack.c b/net/openvswitch/conntrack.c index 0cfa1e9482e6..0b9a785dea45 100644 --- a/net/openvswitch/conntrack.c +++ b/net/openvswitch/conntrack.c @@ -1605,7 +1605,7 @@ static struct sk_buff * ovs_ct_limit_cmd_reply_start(struct genl_info *info, u8 cmd, struct ovs_header **ovs_reply_header) { - struct ovs_header *ovs_header = info->userhdr; + struct ovs_header *ovs_header = genl_info_userhdr(info); struct sk_buff *skb; skb = genlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c index d33cb739883f..0a974eeef76e 100644 --- a/net/openvswitch/datapath.c +++ b/net/openvswitch/datapath.c @@ -590,7 +590,7 @@ static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) { - struct ovs_header *ovs_header = info->userhdr; + struct ovs_header *ovs_header = genl_info_userhdr(info); struct net *net = sock_net(skb->sk); struct nlattr **a = info->attrs; struct sw_flow_actions *acts; @@ -967,7 +967,7 @@ static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) { struct net *net = sock_net(skb->sk); struct nlattr **a = info->attrs; - struct ovs_header *ovs_header = info->userhdr; + struct ovs_header *ovs_header = genl_info_userhdr(info); struct sw_flow *flow = NULL, *new_flow; struct sw_flow_mask mask; struct sk_buff *reply; @@ -1214,7 +1214,7 @@ static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) { struct net *net = sock_net(skb->sk); struct nlattr **a = info->attrs; - struct ovs_header *ovs_header = info->userhdr; + struct ovs_header *ovs_header = genl_info_userhdr(info); struct sw_flow_key key; struct sw_flow *flow; struct sk_buff *reply = NULL; @@ -1315,7 +1315,7 @@ static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) { struct nlattr **a = info->attrs; - struct ovs_header *ovs_header = info->userhdr; + struct ovs_header *ovs_header = genl_info_userhdr(info); struct net *net = sock_net(skb->sk); struct sw_flow_key key; struct sk_buff *reply; @@ -1374,7 +1374,7 @@ static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) { struct nlattr **a = info->attrs; - struct ovs_header *ovs_header = info->userhdr; + struct ovs_header *ovs_header = genl_info_userhdr(info); struct net *net = sock_net(skb->sk); struct sw_flow_key key; struct sk_buff *reply; @@ -1642,7 +1642,7 @@ static void ovs_dp_reset_user_features(struct sk_buff *skb, { struct datapath *dp; - dp = lookup_datapath(sock_net(skb->sk), info->userhdr, + dp = lookup_datapath(sock_net(skb->sk), genl_info_userhdr(info), info->attrs); if (IS_ERR(dp)) return; @@ -1935,7 +1935,8 @@ static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) return -ENOMEM; ovs_lock(); - dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); + dp = lookup_datapath(sock_net(skb->sk), genl_info_userhdr(info), + info->attrs); err = PTR_ERR(dp); if (IS_ERR(dp)) goto err_unlock_free; @@ -1968,7 +1969,8 @@ static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) return -ENOMEM; ovs_lock(); - dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); + dp = lookup_datapath(sock_net(skb->sk), genl_info_userhdr(info), + info->attrs); err = PTR_ERR(dp); if (IS_ERR(dp)) goto err_unlock_free; @@ -2003,7 +2005,8 @@ static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) return -ENOMEM; ovs_lock(); - dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); + dp = lookup_datapath(sock_net(skb->sk), genl_info_userhdr(info), + info->attrs); if (IS_ERR(dp)) { err = PTR_ERR(dp); goto err_unlock_free; @@ -2246,7 +2249,7 @@ static void ovs_update_headroom(struct datapath *dp, unsigned int new_headroom) static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) { struct nlattr **a = info->attrs; - struct ovs_header *ovs_header = info->userhdr; + struct ovs_header *ovs_header = genl_info_userhdr(info); struct vport_parms parms; struct sk_buff *reply; struct vport *vport; @@ -2348,7 +2351,7 @@ static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) return -ENOMEM; ovs_lock(); - vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); + vport = lookup_vport(sock_net(skb->sk), genl_info_userhdr(info), a); err = PTR_ERR(vport); if (IS_ERR(vport)) goto exit_unlock_free; @@ -2404,7 +2407,7 @@ static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) return -ENOMEM; ovs_lock(); - vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); + vport = lookup_vport(sock_net(skb->sk), genl_info_userhdr(info), a); err = PTR_ERR(vport); if (IS_ERR(vport)) goto exit_unlock_free; @@ -2447,7 +2450,7 @@ static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) { struct nlattr **a = info->attrs; - struct ovs_header *ovs_header = info->userhdr; + struct ovs_header *ovs_header = genl_info_userhdr(info); struct sk_buff *reply; struct vport *vport; int err; diff --git a/net/openvswitch/meter.c b/net/openvswitch/meter.c index c4ebf810e4b1..cc08e0403909 100644 --- a/net/openvswitch/meter.c +++ b/net/openvswitch/meter.c @@ -211,7 +211,7 @@ ovs_meter_cmd_reply_start(struct genl_info *info, u8 cmd, struct ovs_header **ovs_reply_header) { struct sk_buff *skb; - struct ovs_header *ovs_header = info->userhdr; + struct ovs_header *ovs_header = genl_info_userhdr(info); skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); if (!skb) @@ -272,7 +272,7 @@ static int ovs_meter_cmd_reply_stats(struct sk_buff *reply, u32 meter_id, static int ovs_meter_cmd_features(struct sk_buff *skb, struct genl_info *info) { - struct ovs_header *ovs_header = info->userhdr; + struct ovs_header *ovs_header = genl_info_userhdr(info); struct ovs_header *ovs_reply_header; struct nlattr *nla, *band_nla; struct sk_buff *reply; @@ -409,7 +409,7 @@ static int ovs_meter_cmd_set(struct sk_buff *skb, struct genl_info *info) struct dp_meter *meter, *old_meter; struct sk_buff *reply; struct ovs_header *ovs_reply_header; - struct ovs_header *ovs_header = info->userhdr; + struct ovs_header *ovs_header = genl_info_userhdr(info); struct dp_meter_table *meter_tbl; struct datapath *dp; int err; @@ -482,7 +482,7 @@ static int ovs_meter_cmd_set(struct sk_buff *skb, struct genl_info *info) static int ovs_meter_cmd_get(struct sk_buff *skb, struct genl_info *info) { - struct ovs_header *ovs_header = info->userhdr; + struct ovs_header *ovs_header = genl_info_userhdr(info); struct ovs_header *ovs_reply_header; struct nlattr **a = info->attrs; struct dp_meter *meter; @@ -535,7 +535,7 @@ static int ovs_meter_cmd_get(struct sk_buff *skb, struct genl_info *info) static int ovs_meter_cmd_del(struct sk_buff *skb, struct genl_info *info) { - struct ovs_header *ovs_header = info->userhdr; + struct ovs_header *ovs_header = genl_info_userhdr(info); struct ovs_header *ovs_reply_header; struct nlattr **a = info->attrs; struct dp_meter *old_meter; diff --git a/net/tipc/netlink_compat.c b/net/tipc/netlink_compat.c index 9b47c8409231..299cd6754f14 100644 --- a/net/tipc/netlink_compat.c +++ b/net/tipc/netlink_compat.c @@ -1294,7 +1294,7 @@ static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info) struct tipc_nl_compat_msg msg; struct nlmsghdr *req_nlh; struct nlmsghdr *rep_nlh; - struct tipc_genlmsghdr *req_userhdr = info->userhdr; + struct tipc_genlmsghdr *req_userhdr = genl_info_userhdr(info); memset(&msg, 0, sizeof(msg)); -- 2.41.0 _______________________________________________ dev mailing list [email protected] https://mail.openvswitch.org/mailman/listinfo/ovs-dev
