[RFC 0/7] netlink: Add allocation flag to netlink_unicast()

Though netlink_broadcast() has allocation flag which can specify memory allocation type (ex. GFP_KERNEL/GFP_ATOMIC), netlink_unicast() does not have it. This can cause "BUG: sleeping function called from invalid context at" with CONFIG_DEBUG_ATOMIC_SLEEP enabled kernel when calling netlink_unicast() inside RCU read-side section and not in IRQ. Though currently such a use case was not found, to solve potential issue we will add an allocation flag to netlink_unicast(). Previously netlink_unicast() have used gfp_any() as a flag. We replaced it to GFP_KERNEL or GFP_ATOMIC or etc by guessing based on context. If we could not determine the value, we remain it gfp_any(). We welcome comments like "this gfp_any() should be GFP_KERNEL". Of course other comments are welcome as well. This series of patches are not tested. This is a RFC because this does not fix existing issue. Masashi Honma (7): netlink: Add allocation flag to netlink_unicast() netfilter: Add allocation flag to nfnetlink_unicast() netlink: Add allocation flag to nlmsg_unicast() infiniband: Add allocation flag to ibnl_unicast() net: Add allocation flag to rtnl_unicast() genetlink: Add allocation flag to genlmsg_unicast() genetlink: Add allocation flag to genlmsg_reply() crypto/crypto_user.c | 3 ++- drivers/block/drbd/drbd_nl.c | 2 +- drivers/connector/connector.c | 2 +- drivers/infiniband/core/iwpm_msg.c | 6 ++--- drivers/infiniband/core/iwpm_util.c | 5 ++-- drivers/infiniband/core/iwpm_util.h | 1 + drivers/infiniband/core/netlink.c | 4 ++-- drivers/net/gtp.c | 3 ++- drivers/net/team/team.c | 5 ++-- drivers/net/wireless/mac80211_hwsim.c | 4 ++-- fs/dlm/netlink.c | 2 +- include/linux/netfilter/nfnetlink.h | 2 +- include/linux/netlink.h | 3 ++- include/linux/rtnetlink.h | 3 ++- include/net/genetlink.h | 13 +++++++---- include/net/netlink.h | 6 +++-- include/rdma/rdma_netlink.h | 3 ++- kernel/audit.c | 9 ++++---- kernel/taskstats.c | 4 ++-- net/core/devlink.c | 12 +++++----- net/core/net_namespace.c | 2 +- net/core/rtnetlink.c | 12 ++++++---- net/dcb/dcbnl.c | 2 +- net/decnet/dn_route.c | 3 ++- net/hsr/hsr_netlink.c | 6 +++-- net/ieee802154/ieee802154.h | 3 ++- net/ieee802154/netlink.c | 5 ++-- net/ieee802154/nl-mac.c | 4 ++-- net/ieee802154/nl-phy.c | 6 ++--- net/ieee802154/nl802154.c | 4 ++-- net/ipv4/devinet.c | 2 +- net/ipv4/fib_frontend.c | 2 +- net/ipv4/fou.c | 2 +- net/ipv4/inet_diag.c | 2 +- net/ipv4/ipmr.c | 6 +++-- net/ipv4/route.c | 2 +- net/ipv4/tcp_metrics.c | 2 +- net/ipv4/udp_diag.c | 2 +- net/ipv6/addrconf.c | 4 ++-- net/ipv6/addrlabel.c | 2 +- net/ipv6/ila/ila_xlat.c | 2 +- net/ipv6/ip6mr.c | 6 +++-- net/ipv6/route.c | 2 +- net/irda/irnetlink.c | 2 +- net/l2tp/l2tp_netlink.c | 8 ++++--- net/netfilter/ipset/ip_set_core.c | 11 +++++---- net/netfilter/ipvs/ip_vs_ctl.c | 2 +- net/netfilter/nf_conntrack_netlink.c | 9 +++++--- net/netfilter/nf_tables_api.c | 10 ++++---- net/netfilter/nfnetlink.c | 4 ++-- net/netfilter/nfnetlink_acct.c | 2 +- net/netfilter/nfnetlink_cthelper.c | 2 +- net/netfilter/nfnetlink_cttimeout.c | 5 ++-- net/netfilter/nfnetlink_log.c | 4 ++-- net/netfilter/nfnetlink_queue.c | 3 ++- net/netfilter/nft_compat.c | 4 ++-- net/netlabel/netlabel_cipso_v4.c | 2 +- net/netlabel/netlabel_mgmt.c | 4 ++-- net/netlabel/netlabel_unlabeled.c | 2 +- net/netlink/af_netlink.c | 14 +++++++----- net/netlink/genetlink.c | 2 +- net/nfc/netlink.c | 6 ++--- net/openvswitch/datapath.c | 9 ++++---- net/sched/act_api.c | 2 +- net/sctp/sctp_diag.c | 2 +- net/tipc/bearer.c | 4 ++-- net/tipc/netlink_compat.c | 2 +- net/tipc/node.c | 2 +- net/unix/diag.c | 2 +- net/wireless/nl80211.c | 43 ++++++++++++++++++----------------- net/xfrm/xfrm_user.c | 15 +++++++----- samples/connector/cn_test.c | 2 +- 72 files changed, 199 insertions(+), 155 deletions(-) -- 2.7.4