Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3) #include <linux/sock_diag.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) #include <linux/net.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #include <linux/packet_diag.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <linux/percpu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <net/net_namespace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <net/sock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include "internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) static int pdiag_put_info(const struct packet_sock *po, struct sk_buff *nlskb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 	struct packet_diag_info pinfo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 	pinfo.pdi_index = po->ifindex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 	pinfo.pdi_version = po->tp_version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 	pinfo.pdi_reserve = po->tp_reserve;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 	pinfo.pdi_copy_thresh = po->copy_thresh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 	pinfo.pdi_tstamp = po->tp_tstamp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	pinfo.pdi_flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	if (po->running)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 		pinfo.pdi_flags |= PDI_RUNNING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	if (po->auxdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 		pinfo.pdi_flags |= PDI_AUXDATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	if (po->origdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 		pinfo.pdi_flags |= PDI_ORIGDEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	if (po->has_vnet_hdr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 		pinfo.pdi_flags |= PDI_VNETHDR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	if (po->tp_loss)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 		pinfo.pdi_flags |= PDI_LOSS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	return nla_put(nlskb, PACKET_DIAG_INFO, sizeof(pinfo), &pinfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) static int pdiag_put_mclist(const struct packet_sock *po, struct sk_buff *nlskb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	struct nlattr *mca;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	struct packet_mclist *ml;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	mca = nla_nest_start_noflag(nlskb, PACKET_DIAG_MCLIST);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	if (!mca)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 		return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	rtnl_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	for (ml = po->mclist; ml; ml = ml->next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 		struct packet_diag_mclist *dml;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 		dml = nla_reserve_nohdr(nlskb, sizeof(*dml));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 		if (!dml) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 			rtnl_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 			nla_nest_cancel(nlskb, mca);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 			return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		dml->pdmc_index = ml->ifindex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 		dml->pdmc_type = ml->type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 		dml->pdmc_alen = ml->alen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 		dml->pdmc_count = ml->count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 		BUILD_BUG_ON(sizeof(dml->pdmc_addr) != sizeof(ml->addr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 		memcpy(dml->pdmc_addr, ml->addr, sizeof(ml->addr));
^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) 	rtnl_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	nla_nest_end(nlskb, mca);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) static int pdiag_put_ring(struct packet_ring_buffer *ring, int ver, int nl_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 		struct sk_buff *nlskb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	struct packet_diag_ring pdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	if (!ring->pg_vec)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	pdr.pdr_block_size = ring->pg_vec_pages << PAGE_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	pdr.pdr_block_nr = ring->pg_vec_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	pdr.pdr_frame_size = ring->frame_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	pdr.pdr_frame_nr = ring->frame_max + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	if (ver > TPACKET_V2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		pdr.pdr_retire_tmo = ring->prb_bdqc.retire_blk_tov;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		pdr.pdr_sizeof_priv = ring->prb_bdqc.blk_sizeof_priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 		pdr.pdr_features = ring->prb_bdqc.feature_req_word;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 		pdr.pdr_retire_tmo = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 		pdr.pdr_sizeof_priv = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 		pdr.pdr_features = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	return nla_put(nlskb, nl_type, sizeof(pdr), &pdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) static int pdiag_put_rings_cfg(struct packet_sock *po, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	mutex_lock(&po->pg_vec_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	ret = pdiag_put_ring(&po->rx_ring, po->tp_version,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 			PACKET_DIAG_RX_RING, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		ret = pdiag_put_ring(&po->tx_ring, po->tp_version,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 				PACKET_DIAG_TX_RING, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	mutex_unlock(&po->pg_vec_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	return ret;
^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) static int pdiag_put_fanout(struct packet_sock *po, struct sk_buff *nlskb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	mutex_lock(&fanout_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	if (po->fanout) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		u32 val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		val = (u32)po->fanout->id | ((u32)po->fanout->type << 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 		ret = nla_put_u32(nlskb, PACKET_DIAG_FANOUT, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	mutex_unlock(&fanout_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) static int sk_diag_fill(struct sock *sk, struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 			struct packet_diag_req *req,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 			bool may_report_filterinfo,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 			struct user_namespace *user_ns,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 			u32 portid, u32 seq, u32 flags, int sk_ino)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	struct nlmsghdr *nlh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	struct packet_diag_msg *rp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	struct packet_sock *po = pkt_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	nlh = nlmsg_put(skb, portid, seq, SOCK_DIAG_BY_FAMILY, sizeof(*rp), flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	if (!nlh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	rp = nlmsg_data(nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	rp->pdiag_family = AF_PACKET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	rp->pdiag_type = sk->sk_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	rp->pdiag_num = ntohs(po->num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	rp->pdiag_ino = sk_ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	sock_diag_save_cookie(sk, rp->pdiag_cookie);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	if ((req->pdiag_show & PACKET_SHOW_INFO) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 			pdiag_put_info(po, skb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 		goto out_nlmsg_trim;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	if ((req->pdiag_show & PACKET_SHOW_INFO) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	    nla_put_u32(skb, PACKET_DIAG_UID,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 			from_kuid_munged(user_ns, sock_i_uid(sk))))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		goto out_nlmsg_trim;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	if ((req->pdiag_show & PACKET_SHOW_MCLIST) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 			pdiag_put_mclist(po, skb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		goto out_nlmsg_trim;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	if ((req->pdiag_show & PACKET_SHOW_RING_CFG) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 			pdiag_put_rings_cfg(po, skb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		goto out_nlmsg_trim;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	if ((req->pdiag_show & PACKET_SHOW_FANOUT) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 			pdiag_put_fanout(po, skb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		goto out_nlmsg_trim;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	if ((req->pdiag_show & PACKET_SHOW_MEMINFO) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	    sock_diag_put_meminfo(sk, skb, PACKET_DIAG_MEMINFO))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		goto out_nlmsg_trim;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	if ((req->pdiag_show & PACKET_SHOW_FILTER) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	    sock_diag_put_filterinfo(may_report_filterinfo, sk, skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 				     PACKET_DIAG_FILTER))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		goto out_nlmsg_trim;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	nlmsg_end(skb, nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) out_nlmsg_trim:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	nlmsg_cancel(skb, nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) static int packet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	int num = 0, s_num = cb->args[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	struct packet_diag_req *req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	struct net *net;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	struct sock *sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	bool may_report_filterinfo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	net = sock_net(skb->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	req = nlmsg_data(cb->nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	may_report_filterinfo = netlink_net_capable(cb->skb, CAP_NET_ADMIN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	mutex_lock(&net->packet.sklist_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	sk_for_each(sk, &net->packet.sklist) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		if (!net_eq(sock_net(sk), net))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 		if (num < s_num)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 			goto next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 		if (sk_diag_fill(sk, skb, req,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 				 may_report_filterinfo,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 				 sk_user_ns(NETLINK_CB(cb->skb).sk),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 				 NETLINK_CB(cb->skb).portid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 				 cb->nlh->nlmsg_seq, NLM_F_MULTI,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 				 sock_i_ino(sk)) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 			goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) next:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		num++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	mutex_unlock(&net->packet.sklist_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	cb->args[0] = num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	return skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) static int packet_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	int hdrlen = sizeof(struct packet_diag_req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	struct net *net = sock_net(skb->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	struct packet_diag_req *req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	if (nlmsg_len(h) < hdrlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	req = nlmsg_data(h);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	/* Make it possible to support protocol filtering later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	if (req->sdiag_protocol)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	if (h->nlmsg_flags & NLM_F_DUMP) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 		struct netlink_dump_control c = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 			.dump = packet_diag_dump,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 		};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 		return netlink_dump_start(net->diag_nlsk, skb, h, &c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	} else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 		return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) static const struct sock_diag_handler packet_diag_handler = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	.family = AF_PACKET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	.dump = packet_diag_handler_dump,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) static int __init packet_diag_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	return sock_diag_register(&packet_diag_handler);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) static void __exit packet_diag_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	sock_diag_unregister(&packet_diag_handler);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) module_init(packet_diag_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) module_exit(packet_diag_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 17 /* AF_PACKET */);