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e00bdbefab
refcount_t type and corresponding API should be used instead of atomic_t when the variable is used as a reference counter. This allows to avoid accidental refcounter overflows that might lead to use-after-free situations. Signed-off-by: Elena Reshetova <elena.reshetova@intel.com> Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com> Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: David Windsor <dwindsor@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
98 lines
3.0 KiB
C
98 lines
3.0 KiB
C
#ifndef MPOA_CACHES_H
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#define MPOA_CACHES_H
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#include <linux/netdevice.h>
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#include <linux/types.h>
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#include <linux/atm.h>
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#include <linux/atmdev.h>
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#include <linux/atmmpc.h>
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#include <linux/refcount.h>
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struct mpoa_client;
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void atm_mpoa_init_cache(struct mpoa_client *mpc);
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typedef struct in_cache_entry {
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struct in_cache_entry *next;
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struct in_cache_entry *prev;
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struct timeval tv;
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struct timeval reply_wait;
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struct timeval hold_down;
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uint32_t packets_fwded;
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uint16_t entry_state;
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uint32_t retry_time;
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uint32_t refresh_time;
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uint32_t count;
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struct atm_vcc *shortcut;
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uint8_t MPS_ctrl_ATM_addr[ATM_ESA_LEN];
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struct in_ctrl_info ctrl_info;
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refcount_t use;
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} in_cache_entry;
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struct in_cache_ops{
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in_cache_entry *(*add_entry)(__be32 dst_ip,
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struct mpoa_client *client);
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in_cache_entry *(*get)(__be32 dst_ip, struct mpoa_client *client);
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in_cache_entry *(*get_with_mask)(__be32 dst_ip,
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struct mpoa_client *client,
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__be32 mask);
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in_cache_entry *(*get_by_vcc)(struct atm_vcc *vcc,
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struct mpoa_client *client);
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void (*put)(in_cache_entry *entry);
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void (*remove_entry)(in_cache_entry *delEntry,
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struct mpoa_client *client );
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int (*cache_hit)(in_cache_entry *entry,
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struct mpoa_client *client);
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void (*clear_count)(struct mpoa_client *client);
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void (*check_resolving)(struct mpoa_client *client);
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void (*refresh)(struct mpoa_client *client);
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void (*destroy_cache)(struct mpoa_client *mpc);
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};
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typedef struct eg_cache_entry{
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struct eg_cache_entry *next;
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struct eg_cache_entry *prev;
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struct timeval tv;
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uint8_t MPS_ctrl_ATM_addr[ATM_ESA_LEN];
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struct atm_vcc *shortcut;
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uint32_t packets_rcvd;
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uint16_t entry_state;
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__be32 latest_ip_addr; /* The src IP address of the last packet */
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struct eg_ctrl_info ctrl_info;
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refcount_t use;
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} eg_cache_entry;
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struct eg_cache_ops{
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eg_cache_entry *(*add_entry)(struct k_message *msg, struct mpoa_client *client);
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eg_cache_entry *(*get_by_cache_id)(__be32 cache_id, struct mpoa_client *client);
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eg_cache_entry *(*get_by_tag)(__be32 cache_id, struct mpoa_client *client);
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eg_cache_entry *(*get_by_vcc)(struct atm_vcc *vcc, struct mpoa_client *client);
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eg_cache_entry *(*get_by_src_ip)(__be32 ipaddr, struct mpoa_client *client);
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void (*put)(eg_cache_entry *entry);
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void (*remove_entry)(eg_cache_entry *entry, struct mpoa_client *client);
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void (*update)(eg_cache_entry *entry, uint16_t holding_time);
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void (*clear_expired)(struct mpoa_client *client);
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void (*destroy_cache)(struct mpoa_client *mpc);
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};
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/* Ingress cache entry states */
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#define INGRESS_REFRESHING 3
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#define INGRESS_RESOLVED 2
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#define INGRESS_RESOLVING 1
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#define INGRESS_INVALID 0
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/* VCC states */
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#define OPEN 1
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#define CLOSED 0
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/* Egress cache entry states */
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#define EGRESS_RESOLVED 2
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#define EGRESS_PURGE 1
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#define EGRESS_INVALID 0
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#endif
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