^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * NETLINK Policy advertisement to userspace
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Authors: Johannes Berg <johannes@sipsolutions.net>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright 2019 Intel Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <net/netlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #define INITIAL_POLICIES_ALLOC 10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) struct netlink_policy_dump_state {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) unsigned int policy_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) unsigned int attr_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) unsigned int n_alloc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) const struct nla_policy *policy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) unsigned int maxtype;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) } policies[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) static int add_policy(struct netlink_policy_dump_state **statep,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) const struct nla_policy *policy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) unsigned int maxtype)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) struct netlink_policy_dump_state *state = *statep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) unsigned int n_alloc, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) if (!policy || !maxtype)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) for (i = 0; i < state->n_alloc; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) if (state->policies[i].policy == policy &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) state->policies[i].maxtype == maxtype)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) if (!state->policies[i].policy) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) state->policies[i].policy = policy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) state->policies[i].maxtype = maxtype;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) n_alloc = state->n_alloc + INITIAL_POLICIES_ALLOC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) state = krealloc(state, struct_size(state, policies, n_alloc),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) if (!state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) memset(&state->policies[state->n_alloc], 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) flex_array_size(state, policies, n_alloc - state->n_alloc));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) state->policies[state->n_alloc].policy = policy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) state->policies[state->n_alloc].maxtype = maxtype;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) state->n_alloc = n_alloc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) *statep = state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) * netlink_policy_dump_get_policy_idx - retrieve policy index
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) * @state: the policy dump state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * @policy: the policy to find
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) * @maxtype: the policy's maxattr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) * Returns: the index of the given policy in the dump state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * Call this to find a policy index when you've added multiple and e.g.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) * need to tell userspace which command has which policy (by index).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) * Note: this will WARN and return 0 if the policy isn't found, which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) * means it wasn't added in the first place, which would be an
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) * internal consistency bug.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) int netlink_policy_dump_get_policy_idx(struct netlink_policy_dump_state *state,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) const struct nla_policy *policy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) unsigned int maxtype)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (WARN_ON(!policy || !maxtype))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) for (i = 0; i < state->n_alloc; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) if (state->policies[i].policy == policy &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) state->policies[i].maxtype == maxtype)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) return i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) WARN_ON(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) static struct netlink_policy_dump_state *alloc_state(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) struct netlink_policy_dump_state *state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) state = kzalloc(struct_size(state, policies, INITIAL_POLICIES_ALLOC),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) if (!state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) state->n_alloc = INITIAL_POLICIES_ALLOC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) return state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) * netlink_policy_dump_add_policy - add a policy to the dump
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) * @pstate: state to add to, may be reallocated, must be %NULL the first time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) * @policy: the new policy to add to the dump
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) * @maxtype: the new policy's max attr type
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) * Returns: 0 on success, a negative error code otherwise.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) * Call this to allocate a policy dump state, and to add policies to it. This
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) * should be called from the dump start() callback.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) * Note: on failures, any previously allocated state is freed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) int netlink_policy_dump_add_policy(struct netlink_policy_dump_state **pstate,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) const struct nla_policy *policy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) unsigned int maxtype)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) struct netlink_policy_dump_state *state = *pstate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) unsigned int policy_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) if (!state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) state = alloc_state();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) if (IS_ERR(state))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) return PTR_ERR(state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) * walk the policies and nested ones first, and build
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) * a linear list of them.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) err = add_policy(&state, policy, maxtype);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) for (policy_idx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) policy_idx < state->n_alloc && state->policies[policy_idx].policy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) policy_idx++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) const struct nla_policy *policy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) unsigned int type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) policy = state->policies[policy_idx].policy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) for (type = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) type <= state->policies[policy_idx].maxtype;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) type++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) switch (policy[type].type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) case NLA_NESTED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) case NLA_NESTED_ARRAY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) err = add_policy(&state,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) policy[type].nested_policy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) policy[type].len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) *pstate = state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) static bool
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) netlink_policy_dump_finished(struct netlink_policy_dump_state *state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) return state->policy_idx >= state->n_alloc ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) !state->policies[state->policy_idx].policy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) * netlink_policy_dump_loop - dumping loop indicator
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) * @state: the policy dump state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) * Returns: %true if the dump continues, %false otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) * Note: this frees the dump state when finishing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) bool netlink_policy_dump_loop(struct netlink_policy_dump_state *state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) return !netlink_policy_dump_finished(state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) int netlink_policy_dump_attr_size_estimate(const struct nla_policy *pt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) /* nested + type */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) int common = 2 * nla_attr_size(sizeof(u32));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) switch (pt->type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) case NLA_UNSPEC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) case NLA_REJECT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) /* these actually don't need any space */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) case NLA_NESTED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) case NLA_NESTED_ARRAY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) /* common, policy idx, policy maxattr */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) return common + 2 * nla_attr_size(sizeof(u32));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) case NLA_U8:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) case NLA_U16:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) case NLA_U32:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) case NLA_U64:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) case NLA_MSECS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) case NLA_S8:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) case NLA_S16:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) case NLA_S32:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) case NLA_S64:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) /* maximum is common, u64 min/max with padding */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) return common +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 2 * (nla_attr_size(0) + nla_attr_size(sizeof(u64)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) case NLA_BITFIELD32:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) return common + nla_attr_size(sizeof(u32));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) case NLA_STRING:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) case NLA_NUL_STRING:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) case NLA_BINARY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) /* maximum is common, u32 min-length/max-length */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) return common + 2 * nla_attr_size(sizeof(u32));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) case NLA_FLAG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) return common;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) /* this should then cause a warning later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) __netlink_policy_dump_write_attr(struct netlink_policy_dump_state *state,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) const struct nla_policy *pt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) int nestattr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) int estimate = netlink_policy_dump_attr_size_estimate(pt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) enum netlink_attribute_type type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) struct nlattr *attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) attr = nla_nest_start(skb, nestattr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) if (!attr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) return -ENOBUFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) switch (pt->type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) case NLA_UNSPEC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) case NLA_REJECT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) /* skip - use NLA_MIN_LEN to advertise such */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) nla_nest_cancel(skb, attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) return -ENODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) case NLA_NESTED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) type = NL_ATTR_TYPE_NESTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) case NLA_NESTED_ARRAY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) if (pt->type == NLA_NESTED_ARRAY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) type = NL_ATTR_TYPE_NESTED_ARRAY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) if (state && pt->nested_policy && pt->len &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) (nla_put_u32(skb, NL_POLICY_TYPE_ATTR_POLICY_IDX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) netlink_policy_dump_get_policy_idx(state,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) pt->nested_policy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) pt->len)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) nla_put_u32(skb, NL_POLICY_TYPE_ATTR_POLICY_MAXTYPE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) pt->len)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) case NLA_U8:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) case NLA_U16:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) case NLA_U32:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) case NLA_U64:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) case NLA_MSECS: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) struct netlink_range_validation range;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) if (pt->type == NLA_U8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) type = NL_ATTR_TYPE_U8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) else if (pt->type == NLA_U16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) type = NL_ATTR_TYPE_U16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) else if (pt->type == NLA_U32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) type = NL_ATTR_TYPE_U32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) type = NL_ATTR_TYPE_U64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) if (pt->validation_type == NLA_VALIDATE_MASK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) if (nla_put_u64_64bit(skb, NL_POLICY_TYPE_ATTR_MASK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) pt->mask,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) NL_POLICY_TYPE_ATTR_PAD))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) nla_get_range_unsigned(pt, &range);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) if (nla_put_u64_64bit(skb, NL_POLICY_TYPE_ATTR_MIN_VALUE_U,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) range.min, NL_POLICY_TYPE_ATTR_PAD) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) nla_put_u64_64bit(skb, NL_POLICY_TYPE_ATTR_MAX_VALUE_U,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) range.max, NL_POLICY_TYPE_ATTR_PAD))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) case NLA_S8:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) case NLA_S16:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) case NLA_S32:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) case NLA_S64: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) struct netlink_range_validation_signed range;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) if (pt->type == NLA_S8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) type = NL_ATTR_TYPE_S8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) else if (pt->type == NLA_S16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) type = NL_ATTR_TYPE_S16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) else if (pt->type == NLA_S32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) type = NL_ATTR_TYPE_S32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) type = NL_ATTR_TYPE_S64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) nla_get_range_signed(pt, &range);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) if (nla_put_s64(skb, NL_POLICY_TYPE_ATTR_MIN_VALUE_S,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) range.min, NL_POLICY_TYPE_ATTR_PAD) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) nla_put_s64(skb, NL_POLICY_TYPE_ATTR_MAX_VALUE_S,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) range.max, NL_POLICY_TYPE_ATTR_PAD))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) case NLA_BITFIELD32:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) type = NL_ATTR_TYPE_BITFIELD32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) if (nla_put_u32(skb, NL_POLICY_TYPE_ATTR_BITFIELD32_MASK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) pt->bitfield32_valid))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) case NLA_STRING:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) case NLA_NUL_STRING:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) case NLA_BINARY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) if (pt->type == NLA_STRING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) type = NL_ATTR_TYPE_STRING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) else if (pt->type == NLA_NUL_STRING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) type = NL_ATTR_TYPE_NUL_STRING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) type = NL_ATTR_TYPE_BINARY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) if (pt->validation_type == NLA_VALIDATE_RANGE ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) pt->validation_type == NLA_VALIDATE_RANGE_WARN_TOO_LONG) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) struct netlink_range_validation range;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) nla_get_range_unsigned(pt, &range);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) if (range.min &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) nla_put_u32(skb, NL_POLICY_TYPE_ATTR_MIN_LENGTH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) range.min))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) if (range.max < U16_MAX &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) nla_put_u32(skb, NL_POLICY_TYPE_ATTR_MAX_LENGTH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) range.max))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) } else if (pt->len &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) nla_put_u32(skb, NL_POLICY_TYPE_ATTR_MAX_LENGTH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) pt->len)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) case NLA_FLAG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) type = NL_ATTR_TYPE_FLAG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) if (nla_put_u32(skb, NL_POLICY_TYPE_ATTR_TYPE, type))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) nla_nest_end(skb, attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) WARN_ON(attr->nla_len > estimate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) nla_put_failure:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) nla_nest_cancel(skb, attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) return -ENOBUFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) * netlink_policy_dump_write_attr - write a given attribute policy
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) * @skb: the message skb to write to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) * @pt: the attribute's policy
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) * @nestattr: the nested attribute ID to use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) * Returns: 0 on success, an error code otherwise; -%ENODATA is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) * special, indicating that there's no policy data and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) * the attribute is generally rejected.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) int netlink_policy_dump_write_attr(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) const struct nla_policy *pt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) int nestattr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) return __netlink_policy_dump_write_attr(NULL, skb, pt, nestattr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) * netlink_policy_dump_write - write current policy dump attributes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) * @skb: the message skb to write to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) * @state: the policy dump state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) * Returns: 0 on success, an error code otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) int netlink_policy_dump_write(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) struct netlink_policy_dump_state *state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) const struct nla_policy *pt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) struct nlattr *policy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) bool again;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) send_attribute:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) again = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) pt = &state->policies[state->policy_idx].policy[state->attr_idx];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) policy = nla_nest_start(skb, state->policy_idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) if (!policy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) return -ENOBUFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) err = __netlink_policy_dump_write_attr(state, skb, pt, state->attr_idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) if (err == -ENODATA) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) nla_nest_cancel(skb, policy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) again = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) goto next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) } else if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) /* finish and move state to next attribute */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) nla_nest_end(skb, policy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) next:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) state->attr_idx += 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) if (state->attr_idx > state->policies[state->policy_idx].maxtype) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) state->attr_idx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) state->policy_idx++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) if (again) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) if (netlink_policy_dump_finished(state))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) return -ENODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) goto send_attribute;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) nla_put_failure:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) nla_nest_cancel(skb, policy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) return -ENOBUFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) * netlink_policy_dump_free - free policy dump state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) * @state: the policy dump state to free
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) * Call this from the done() method to ensure dump state is freed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) void netlink_policy_dump_free(struct netlink_policy_dump_state *state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) kfree(state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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