![nikolay@redhat.com](/assets/img/avatar_default.png)
When bond_3ad_get_active_agg_info() is used in all show_ad_ functions it is not protected against slave manipulation and since it walks over the slaves and uses them, this can easily result in NULL pointer dereference or use of freed memory. Both the new wrapper and the internal function are exported to the bonding as they're needed in different places. Signed-off-by: Nikolay Aleksandrov <nikolay@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
285 lines
9.1 KiB
C
285 lines
9.1 KiB
C
/*
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* Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59
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* Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* The full GNU General Public License is included in this distribution in the
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* file called LICENSE.
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*
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*/
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#ifndef __BOND_3AD_H__
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#define __BOND_3AD_H__
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#include <asm/byteorder.h>
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#include <linux/skbuff.h>
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#include <linux/netdevice.h>
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#include <linux/if_ether.h>
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// General definitions
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#define PKT_TYPE_LACPDU cpu_to_be16(ETH_P_SLOW)
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#define AD_TIMER_INTERVAL 100 /*msec*/
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#define MULTICAST_LACPDU_ADDR {0x01, 0x80, 0xC2, 0x00, 0x00, 0x02}
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#define AD_LACP_SLOW 0
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#define AD_LACP_FAST 1
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typedef struct mac_addr {
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u8 mac_addr_value[ETH_ALEN];
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} __packed mac_addr_t;
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enum {
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BOND_AD_STABLE = 0,
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BOND_AD_BANDWIDTH = 1,
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BOND_AD_COUNT = 2,
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};
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// rx machine states(43.4.11 in the 802.3ad standard)
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typedef enum {
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AD_RX_DUMMY,
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AD_RX_INITIALIZE, // rx Machine
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AD_RX_PORT_DISABLED, // rx Machine
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AD_RX_LACP_DISABLED, // rx Machine
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AD_RX_EXPIRED, // rx Machine
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AD_RX_DEFAULTED, // rx Machine
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AD_RX_CURRENT // rx Machine
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} rx_states_t;
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// periodic machine states(43.4.12 in the 802.3ad standard)
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typedef enum {
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AD_PERIODIC_DUMMY,
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AD_NO_PERIODIC, // periodic machine
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AD_FAST_PERIODIC, // periodic machine
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AD_SLOW_PERIODIC, // periodic machine
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AD_PERIODIC_TX // periodic machine
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} periodic_states_t;
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// mux machine states(43.4.13 in the 802.3ad standard)
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typedef enum {
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AD_MUX_DUMMY,
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AD_MUX_DETACHED, // mux machine
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AD_MUX_WAITING, // mux machine
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AD_MUX_ATTACHED, // mux machine
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AD_MUX_COLLECTING_DISTRIBUTING // mux machine
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} mux_states_t;
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// tx machine states(43.4.15 in the 802.3ad standard)
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typedef enum {
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AD_TX_DUMMY,
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AD_TRANSMIT // tx Machine
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} tx_states_t;
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// rx indication types
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typedef enum {
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AD_TYPE_LACPDU = 1, // type lacpdu
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AD_TYPE_MARKER // type marker
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} pdu_type_t;
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// rx marker indication types
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typedef enum {
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AD_MARKER_INFORMATION_SUBTYPE = 1, // marker imformation subtype
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AD_MARKER_RESPONSE_SUBTYPE // marker response subtype
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} bond_marker_subtype_t;
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// timers types(43.4.9 in the 802.3ad standard)
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typedef enum {
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AD_CURRENT_WHILE_TIMER,
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AD_ACTOR_CHURN_TIMER,
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AD_PERIODIC_TIMER,
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AD_PARTNER_CHURN_TIMER,
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AD_WAIT_WHILE_TIMER
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} ad_timers_t;
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#pragma pack(1)
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// Link Aggregation Control Protocol(LACP) data unit structure(43.4.2.2 in the 802.3ad standard)
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typedef struct lacpdu {
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u8 subtype; // = LACP(= 0x01)
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u8 version_number;
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u8 tlv_type_actor_info; // = actor information(type/length/value)
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u8 actor_information_length; // = 20
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__be16 actor_system_priority;
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struct mac_addr actor_system;
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__be16 actor_key;
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__be16 actor_port_priority;
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__be16 actor_port;
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u8 actor_state;
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u8 reserved_3_1[3]; // = 0
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u8 tlv_type_partner_info; // = partner information
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u8 partner_information_length; // = 20
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__be16 partner_system_priority;
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struct mac_addr partner_system;
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__be16 partner_key;
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__be16 partner_port_priority;
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__be16 partner_port;
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u8 partner_state;
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u8 reserved_3_2[3]; // = 0
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u8 tlv_type_collector_info; // = collector information
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u8 collector_information_length; // = 16
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__be16 collector_max_delay;
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u8 reserved_12[12];
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u8 tlv_type_terminator; // = terminator
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u8 terminator_length; // = 0
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u8 reserved_50[50]; // = 0
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} __packed lacpdu_t;
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typedef struct lacpdu_header {
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struct ethhdr hdr;
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struct lacpdu lacpdu;
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} __packed lacpdu_header_t;
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// Marker Protocol Data Unit(PDU) structure(43.5.3.2 in the 802.3ad standard)
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typedef struct bond_marker {
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u8 subtype; // = 0x02 (marker PDU)
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u8 version_number; // = 0x01
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u8 tlv_type; // = 0x01 (marker information)
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// = 0x02 (marker response information)
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u8 marker_length; // = 0x16
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u16 requester_port; // The number assigned to the port by the requester
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struct mac_addr requester_system; // The requester's system id
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u32 requester_transaction_id; // The transaction id allocated by the requester,
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u16 pad; // = 0
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u8 tlv_type_terminator; // = 0x00
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u8 terminator_length; // = 0x00
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u8 reserved_90[90]; // = 0
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} __packed bond_marker_t;
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typedef struct bond_marker_header {
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struct ethhdr hdr;
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struct bond_marker marker;
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} __packed bond_marker_header_t;
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#pragma pack()
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struct slave;
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struct bonding;
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struct ad_info;
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struct port;
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#ifdef __ia64__
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#pragma pack(8)
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#endif
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// aggregator structure(43.4.5 in the 802.3ad standard)
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typedef struct aggregator {
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struct mac_addr aggregator_mac_address;
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u16 aggregator_identifier;
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bool is_individual;
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u16 actor_admin_aggregator_key;
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u16 actor_oper_aggregator_key;
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struct mac_addr partner_system;
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u16 partner_system_priority;
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u16 partner_oper_aggregator_key;
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u16 receive_state; // BOOLEAN
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u16 transmit_state; // BOOLEAN
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struct port *lag_ports;
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// ****** PRIVATE PARAMETERS ******
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struct slave *slave; // pointer to the bond slave that this aggregator belongs to
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u16 is_active; // BOOLEAN. Indicates if this aggregator is active
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u16 num_of_ports;
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} aggregator_t;
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struct port_params {
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struct mac_addr system;
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u16 system_priority;
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u16 key;
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u16 port_number;
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u16 port_priority;
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u16 port_state;
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};
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// port structure(43.4.6 in the 802.3ad standard)
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typedef struct port {
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u16 actor_port_number;
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u16 actor_port_priority;
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struct mac_addr actor_system; // This parameter is added here although it is not specified in the standard, just for simplification
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u16 actor_system_priority; // This parameter is added here although it is not specified in the standard, just for simplification
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u16 actor_port_aggregator_identifier;
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bool ntt;
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u16 actor_admin_port_key;
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u16 actor_oper_port_key;
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u8 actor_admin_port_state;
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u8 actor_oper_port_state;
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struct port_params partner_admin;
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struct port_params partner_oper;
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bool is_enabled;
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// ****** PRIVATE PARAMETERS ******
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u16 sm_vars; // all state machines variables for this port
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rx_states_t sm_rx_state; // state machine rx state
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u16 sm_rx_timer_counter; // state machine rx timer counter
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periodic_states_t sm_periodic_state;// state machine periodic state
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u16 sm_periodic_timer_counter; // state machine periodic timer counter
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mux_states_t sm_mux_state; // state machine mux state
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u16 sm_mux_timer_counter; // state machine mux timer counter
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tx_states_t sm_tx_state; // state machine tx state
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u16 sm_tx_timer_counter; // state machine tx timer counter(allways on - enter to transmit state 3 time per second)
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struct slave *slave; // pointer to the bond slave that this port belongs to
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struct aggregator *aggregator; // pointer to an aggregator that this port related to
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struct port *next_port_in_aggregator; // Next port on the linked list of the parent aggregator
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u32 transaction_id; // continuous number for identification of Marker PDU's;
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struct lacpdu lacpdu; // the lacpdu that will be sent for this port
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} port_t;
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// system structure
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struct ad_system {
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u16 sys_priority;
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struct mac_addr sys_mac_addr;
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};
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#ifdef __ia64__
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#pragma pack()
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#endif
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// ================= AD Exported structures to the main bonding code ==================
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#define BOND_AD_INFO(bond) ((bond)->ad_info)
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#define SLAVE_AD_INFO(slave) ((slave)->ad_info)
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struct ad_bond_info {
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struct ad_system system; /* 802.3ad system structure */
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u32 agg_select_timer; // Timer to select aggregator after all adapter's hand shakes
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};
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struct ad_slave_info {
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struct aggregator aggregator; // 802.3ad aggregator structure
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struct port port; // 802.3ad port structure
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spinlock_t state_machine_lock; /* mutex state machines vs.
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incoming LACPDU */
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u16 id;
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};
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// ================= AD Exported functions to the main bonding code ==================
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void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution);
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int bond_3ad_bind_slave(struct slave *slave);
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void bond_3ad_unbind_slave(struct slave *slave);
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void bond_3ad_state_machine_handler(struct work_struct *);
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void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout);
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void bond_3ad_adapter_speed_changed(struct slave *slave);
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void bond_3ad_adapter_duplex_changed(struct slave *slave);
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void bond_3ad_handle_link_change(struct slave *slave, char link);
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int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info);
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int __bond_3ad_get_active_agg_info(struct bonding *bond,
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struct ad_info *ad_info);
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int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev);
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int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
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struct slave *slave);
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int bond_3ad_set_carrier(struct bonding *bond);
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void bond_3ad_update_lacp_rate(struct bonding *bond);
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#endif //__BOND_3AD_H__
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