48c62af68a
After shrinking the common_audit_data stack usage for private LSM data I'm not going to shrink the data union. To do this I'm going to move anything larger than 2 void * ptrs to it's own structure and require it to be declared separately on the calling stack. Thus hot paths which don't need more than a couple pointer don't have to declare space to hold large unneeded structures. I could get this down to one void * by dealing with the key struct and the struct path. We'll see if that is helpful after taking care of networking. Signed-off-by: Eric Paris <eparis@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
107 lines
2.5 KiB
C
107 lines
2.5 KiB
C
/*
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* Common LSM logging functions
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* Heavily borrowed from selinux/avc.h
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*
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* Author : Etienne BASSET <etienne.basset@ensta.org>
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*
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* All credits to : Stephen Smalley, <sds@epoch.ncsc.mil>
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* All BUGS to : Etienne BASSET <etienne.basset@ensta.org>
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*/
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#ifndef _LSM_COMMON_LOGGING_
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#define _LSM_COMMON_LOGGING_
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#include <linux/stddef.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/kdev_t.h>
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#include <linux/spinlock.h>
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#include <linux/init.h>
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#include <linux/audit.h>
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#include <linux/in6.h>
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#include <linux/path.h>
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#include <linux/key.h>
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#include <linux/skbuff.h>
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struct lsm_network_audit {
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int netif;
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struct sock *sk;
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u16 family;
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__be16 dport;
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__be16 sport;
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union {
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struct {
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__be32 daddr;
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__be32 saddr;
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} v4;
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struct {
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struct in6_addr daddr;
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struct in6_addr saddr;
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} v6;
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} fam;
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};
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/* Auxiliary data to use in generating the audit record. */
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struct common_audit_data {
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char type;
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#define LSM_AUDIT_DATA_PATH 1
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#define LSM_AUDIT_DATA_NET 2
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#define LSM_AUDIT_DATA_CAP 3
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#define LSM_AUDIT_DATA_IPC 4
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#define LSM_AUDIT_DATA_TASK 5
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#define LSM_AUDIT_DATA_KEY 6
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#define LSM_AUDIT_DATA_NONE 7
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#define LSM_AUDIT_DATA_KMOD 8
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#define LSM_AUDIT_DATA_INODE 9
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#define LSM_AUDIT_DATA_DENTRY 10
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struct task_struct *tsk;
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union {
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struct path path;
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struct dentry *dentry;
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struct inode *inode;
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struct lsm_network_audit *net;
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int cap;
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int ipc_id;
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struct task_struct *tsk;
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#ifdef CONFIG_KEYS
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struct {
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key_serial_t key;
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char *key_desc;
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} key_struct;
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#endif
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char *kmod_name;
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} u;
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/* this union contains LSM specific data */
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union {
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#ifdef CONFIG_SECURITY_SMACK
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struct smack_audit_data *smack_audit_data;
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#endif
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#ifdef CONFIG_SECURITY_SELINUX
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struct selinux_audit_data *selinux_audit_data;
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#endif
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#ifdef CONFIG_SECURITY_APPARMOR
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struct apparmor_audit_data *apparmor_audit_data;
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#endif
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}; /* per LSM data pointer union */
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/* these callback will be implemented by a specific LSM */
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void (*lsm_pre_audit)(struct audit_buffer *, void *);
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void (*lsm_post_audit)(struct audit_buffer *, void *);
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};
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#define v4info fam.v4
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#define v6info fam.v6
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int ipv4_skb_to_auditdata(struct sk_buff *skb,
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struct common_audit_data *ad, u8 *proto);
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int ipv6_skb_to_auditdata(struct sk_buff *skb,
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struct common_audit_data *ad, u8 *proto);
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/* Initialize an LSM audit data structure. */
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#define COMMON_AUDIT_DATA_INIT(_d, _t) \
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{ memset((_d), 0, sizeof(struct common_audit_data)); \
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(_d)->type = LSM_AUDIT_DATA_##_t; }
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void common_lsm_audit(struct common_audit_data *a);
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#endif
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