security/selinux/ss/conditional.h

Source file repositories/reference/linux-study-clean/security/selinux/ss/conditional.h

File Facts

System
Linux kernel
Corpus path
security/selinux/ss/conditional.h
Extension
.h
Size
2535 bytes
Lines
85
Domain
Core OS
Bucket
Security And Isolation
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct cond_expr_node {
#define COND_BOOL 1 /* plain bool */
#define COND_NOT  2 /* !bool */
#define COND_OR	  3 /* bool || bool */
#define COND_AND  4 /* bool && bool */
#define COND_XOR  5 /* bool ^ bool */
#define COND_EQ	  6 /* bool == bool */
#define COND_NEQ  7 /* bool != bool */
#define COND_LAST COND_NEQ
	u32 expr_type;
	u32 boolean;
};

struct cond_expr {
	struct cond_expr_node *nodes;
	u32 len;
};

/*
 * Each cond_node contains a list of rules to be enabled/disabled
 * depending on the current value of the conditional expression. This
 * struct is for that list.
 */
struct cond_av_list {
	struct avtab_node **nodes;
	u32 len;
};

/*
 * A cond node represents a conditional block in a policy. It
 * contains a conditional expression, the current state of the expression,
 * two lists of rules to enable/disable depending on the value of the
 * expression (the true list corresponds to if and the false list corresponds
 * to else)..
 */
struct cond_node {
	int cur_state;
	struct cond_expr expr;
	struct cond_av_list true_list;
	struct cond_av_list false_list;
};

void cond_policydb_init(struct policydb *p);
void cond_policydb_destroy(struct policydb *p);

int cond_init_bool_indexes(struct policydb *p);
int cond_destroy_bool(void *key, void *datum, void *p);

int cond_index_bool(void *key, void *datum, void *datap);

int cond_read_bool(struct policydb *p, struct symtab *s, struct policy_file *fp);
int cond_read_list(struct policydb *p, struct policy_file *fp);
int cond_write_bool(void *key, void *datum, void *ptr);
int cond_write_list(struct policydb *p, struct policy_file *fp);

void cond_compute_av(struct avtab *ctab, struct avtab_key *key,
		     struct av_decision *avd, struct extended_perms *xperms);
void cond_compute_xperms(struct avtab *ctab, struct avtab_key *key,
			 struct extended_perms_decision *xpermd);
void evaluate_cond_nodes(struct policydb *p);
void cond_policydb_destroy_dup(struct policydb *p);
int cond_policydb_dup(struct policydb *new, const struct policydb *orig);

#endif /* _CONDITIONAL_H_ */

Annotation

Implementation Notes