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selinux: constify some avtab function arguments

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This makes the code a bit easier to reason about.

Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
This commit is contained in:
Ondrej Mosnacek 2021-03-30 15:16:46 +02:00 committed by Paul Moore
parent fba472bb38
commit e1cce3a3cb
3 changed files with 26 additions and 21 deletions
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28
security/selinux/ss/avtab.c
View File

@ -29,7 +29,7 @@ static struct kmem_cache *avtab_xperms_cachep __ro_after_init;
/* Based on MurmurHash3, written by Austin Appleby and placed in the
* public domain.
*/
static inline int avtab_hash(struct avtab_key *keyp, u32 mask)
static inline int avtab_hash(const struct avtab_key *keyp, u32 mask)
{
static const u32 c1 = 0xcc9e2d51;
static const u32 c2 = 0x1b873593;
@ -68,7 +68,7 @@ static inline int avtab_hash(struct avtab_key *keyp, u32 mask)
static struct avtab_node*
avtab_insert_node(struct avtab *h, int hvalue,
struct avtab_node *prev, struct avtab_node *cur,
struct avtab_key *key, struct avtab_datum *datum)
const struct avtab_key *key, const struct avtab_datum *datum)
{
struct avtab_node *newnode;
struct avtab_extended_perms *xperms;
@ -103,7 +103,8 @@ avtab_insert_node(struct avtab *h, int hvalue,
return newnode;
}
static int avtab_insert(struct avtab *h, struct avtab_key *key, struct avtab_datum *datum)
static int avtab_insert(struct avtab *h, const struct avtab_key *key,
const struct avtab_datum *datum)
{
int hvalue;
struct avtab_node *prev, *cur, *newnode;
@ -147,8 +148,9 @@ static int avtab_insert(struct avtab *h, struct avtab_key *key, struct avtab_dat
* key/specified mask into the table, as needed by the conditional avtab.
* It also returns a pointer to the node inserted.
*/
struct avtab_node *
avtab_insert_nonunique(struct avtab *h, struct avtab_key *key, struct avtab_datum *datum)
struct avtab_node *avtab_insert_nonunique(struct avtab *h,
const struct avtab_key *key,
const struct avtab_datum *datum)
{
int hvalue;
struct avtab_node *prev, *cur;
@ -178,7 +180,7 @@ avtab_insert_nonunique(struct avtab *h, struct avtab_key *key, struct avtab_datu
return avtab_insert_node(h, hvalue, prev, cur, key, datum);
}
struct avtab_datum *avtab_search(struct avtab *h, struct avtab_key *key)
struct avtab_datum *avtab_search(struct avtab *h, const struct avtab_key *key)
{
int hvalue;
struct avtab_node *cur;
@ -213,8 +215,8 @@ struct avtab_datum *avtab_search(struct avtab *h, struct avtab_key *key)
/* This search function returns a node pointer, and can be used in
* conjunction with avtab_search_next_node()
*/
struct avtab_node*
avtab_search_node(struct avtab *h, struct avtab_key *key)
struct avtab_node *avtab_search_node(struct avtab *h,
const struct avtab_key *key)
{
int hvalue;
struct avtab_node *cur;
@ -396,8 +398,8 @@ static uint16_t spec_order[] = {
};
int avtab_read_item(struct avtab *a, void *fp, struct policydb *pol,
int (*insertf)(struct avtab *a, struct avtab_key *k,
struct avtab_datum *d, void *p),
int (*insertf)(struct avtab *a, const struct avtab_key *k,
const struct avtab_datum *d, void *p),
void *p)
{
__le16 buf16[4];
@ -557,8 +559,8 @@ int avtab_read_item(struct avtab *a, void *fp, struct policydb *pol,
return insertf(a, &key, &datum, p);
}
static int avtab_insertf(struct avtab *a, struct avtab_key *k,
struct avtab_datum *d, void *p)
static int avtab_insertf(struct avtab *a, const struct avtab_key *k,
const struct avtab_datum *d, void *p)
{
return avtab_insert(a, k, d);
}
@ -607,7 +609,7 @@ bad:
goto out;
}
int avtab_write_item(struct policydb *p, struct avtab_node *cur, void *fp)
int avtab_write_item(struct policydb *p, const struct avtab_node *cur, void *fp)
{
__le16 buf16[4];
__le32 buf32[ARRAY_SIZE(cur->datum.u.xperms->perms.p)];

16
security/selinux/ss/avtab.h
View File

@ -90,24 +90,26 @@ struct avtab {
void avtab_init(struct avtab *h);
int avtab_alloc(struct avtab *, u32);
int avtab_alloc_dup(struct avtab *new, const struct avtab *orig);
struct avtab_datum *avtab_search(struct avtab *h, struct avtab_key *k);
struct avtab_datum *avtab_search(struct avtab *h, const struct avtab_key *k);
void avtab_destroy(struct avtab *h);
void avtab_hash_eval(struct avtab *h, char *tag);
struct policydb;
int avtab_read_item(struct avtab *a, void *fp, struct policydb *pol,
int (*insert)(struct avtab *a, struct avtab_key *k,
struct avtab_datum *d, void *p),
int (*insert)(struct avtab *a, const struct avtab_key *k,
const struct avtab_datum *d, void *p),
void *p);
int avtab_read(struct avtab *a, void *fp, struct policydb *pol);
int avtab_write_item(struct policydb *p, struct avtab_node *cur, void *fp);
int avtab_write_item(struct policydb *p, const struct avtab_node *cur, void *fp);
int avtab_write(struct policydb *p, struct avtab *a, void *fp);
struct avtab_node *avtab_insert_nonunique(struct avtab *h, struct avtab_key *key,
struct avtab_datum *datum);
struct avtab_node *avtab_insert_nonunique(struct avtab *h,
const struct avtab_key *key,
const struct avtab_datum *datum);
struct avtab_node *avtab_search_node(struct avtab *h, struct avtab_key *key);
struct avtab_node *avtab_search_node(struct avtab *h,
const struct avtab_key *key);
struct avtab_node *avtab_search_node_next(struct avtab_node *node, int specified);

3
security/selinux/ss/conditional.c
View File

@ -254,7 +254,8 @@ struct cond_insertf_data {
struct cond_av_list *other;
};
static int cond_insertf(struct avtab *a, struct avtab_key *k, struct avtab_datum *d, void *ptr)
static int cond_insertf(struct avtab *a, const struct avtab_key *k,
const struct avtab_datum *d, void *ptr)
{
struct cond_insertf_data *data = ptr;
struct policydb *p = data->p;