diff options
Diffstat (limited to 'security/selinux/ss/ebitmap.h')
-rw-r--r-- | security/selinux/ss/ebitmap.h | 87 |
1 files changed, 44 insertions, 43 deletions
diff --git a/security/selinux/ss/ebitmap.h b/security/selinux/ss/ebitmap.h index e3c807cfad90..c9569998f287 100644 --- a/security/selinux/ss/ebitmap.h +++ b/security/selinux/ss/ebitmap.h @@ -12,23 +12,25 @@ * * Author : Stephen Smalley, <stephen.smalley.work@gmail.com> */ + #ifndef _SS_EBITMAP_H_ #define _SS_EBITMAP_H_ #include <net/netlabel.h> #ifdef CONFIG_64BIT -#define EBITMAP_NODE_SIZE 64 +#define EBITMAP_NODE_SIZE 64 #else -#define EBITMAP_NODE_SIZE 32 +#define EBITMAP_NODE_SIZE 32 #endif -#define EBITMAP_UNIT_NUMS ((EBITMAP_NODE_SIZE-sizeof(void *)-sizeof(u32))\ - / sizeof(unsigned long)) -#define EBITMAP_UNIT_SIZE BITS_PER_LONG -#define EBITMAP_SIZE (EBITMAP_UNIT_NUMS * EBITMAP_UNIT_SIZE) -#define EBITMAP_BIT 1ULL -#define EBITMAP_SHIFT_UNIT_SIZE(x) \ +#define EBITMAP_UNIT_NUMS \ + ((EBITMAP_NODE_SIZE - sizeof(void *) - sizeof(u32)) / \ + sizeof(unsigned long)) +#define EBITMAP_UNIT_SIZE BITS_PER_LONG +#define EBITMAP_SIZE (EBITMAP_UNIT_NUMS * EBITMAP_UNIT_SIZE) +#define EBITMAP_BIT 1UL +#define EBITMAP_SHIFT_UNIT_SIZE(x) \ (((x) >> EBITMAP_UNIT_SIZE / 2) >> EBITMAP_UNIT_SIZE / 2) struct ebitmap_node { @@ -38,16 +40,16 @@ struct ebitmap_node { }; struct ebitmap { - struct ebitmap_node *node; /* first node in the bitmap */ - u32 highbit; /* highest position in the total bitmap */ + struct ebitmap_node *node; /* first node in the bitmap */ + u32 highbit; /* highest position in the total bitmap */ }; #define ebitmap_length(e) ((e)->highbit) -static inline unsigned int ebitmap_start_positive(const struct ebitmap *e, - struct ebitmap_node **n) +static inline u32 ebitmap_start_positive(const struct ebitmap *e, + struct ebitmap_node **n) { - unsigned int ofs; + u32 ofs; for (*n = e->node; *n; *n = (*n)->next) { ofs = find_first_bit((*n)->maps, EBITMAP_SIZE); @@ -62,11 +64,10 @@ static inline void ebitmap_init(struct ebitmap *e) memset(e, 0, sizeof(*e)); } -static inline unsigned int ebitmap_next_positive(const struct ebitmap *e, - struct ebitmap_node **n, - unsigned int bit) +static inline u32 ebitmap_next_positive(const struct ebitmap *e, + struct ebitmap_node **n, u32 bit) { - unsigned int ofs; + u32 ofs; ofs = find_next_bit((*n)->maps, EBITMAP_SIZE, bit - (*n)->startbit + 1); if (ofs < EBITMAP_SIZE) @@ -80,16 +81,15 @@ static inline unsigned int ebitmap_next_positive(const struct ebitmap *e, return ebitmap_length(e); } -#define EBITMAP_NODE_INDEX(node, bit) \ +#define EBITMAP_NODE_INDEX(node, bit) \ (((bit) - (node)->startbit) / EBITMAP_UNIT_SIZE) -#define EBITMAP_NODE_OFFSET(node, bit) \ +#define EBITMAP_NODE_OFFSET(node, bit) \ (((bit) - (node)->startbit) % EBITMAP_UNIT_SIZE) -static inline int ebitmap_node_get_bit(const struct ebitmap_node *n, - unsigned int bit) +static inline int ebitmap_node_get_bit(const struct ebitmap_node *n, u32 bit) { - unsigned int index = EBITMAP_NODE_INDEX(n, bit); - unsigned int ofs = EBITMAP_NODE_OFFSET(n, bit); + u32 index = EBITMAP_NODE_INDEX(n, bit); + u32 ofs = EBITMAP_NODE_OFFSET(n, bit); BUG_ON(index >= EBITMAP_UNIT_NUMS); if ((n->maps[index] & (EBITMAP_BIT << ofs))) @@ -97,40 +97,41 @@ static inline int ebitmap_node_get_bit(const struct ebitmap_node *n, return 0; } -static inline void ebitmap_node_set_bit(struct ebitmap_node *n, - unsigned int bit) +static inline void ebitmap_node_set_bit(struct ebitmap_node *n, u32 bit) { - unsigned int index = EBITMAP_NODE_INDEX(n, bit); - unsigned int ofs = EBITMAP_NODE_OFFSET(n, bit); + u32 index = EBITMAP_NODE_INDEX(n, bit); + u32 ofs = EBITMAP_NODE_OFFSET(n, bit); BUG_ON(index >= EBITMAP_UNIT_NUMS); n->maps[index] |= (EBITMAP_BIT << ofs); } -static inline void ebitmap_node_clr_bit(struct ebitmap_node *n, - unsigned int bit) +static inline void ebitmap_node_clr_bit(struct ebitmap_node *n, u32 bit) { - unsigned int index = EBITMAP_NODE_INDEX(n, bit); - unsigned int ofs = EBITMAP_NODE_OFFSET(n, bit); + u32 index = EBITMAP_NODE_INDEX(n, bit); + u32 ofs = EBITMAP_NODE_OFFSET(n, bit); BUG_ON(index >= EBITMAP_UNIT_NUMS); n->maps[index] &= ~(EBITMAP_BIT << ofs); } -#define ebitmap_for_each_positive_bit(e, n, bit) \ - for ((bit) = ebitmap_start_positive(e, &(n)); \ - (bit) < ebitmap_length(e); \ - (bit) = ebitmap_next_positive(e, &(n), bit)) \ +#define ebitmap_for_each_positive_bit(e, n, bit) \ + for ((bit) = ebitmap_start_positive(e, &(n)); \ + (bit) < ebitmap_length(e); \ + (bit) = ebitmap_next_positive(e, &(n), bit)) -int ebitmap_cmp(const struct ebitmap *e1, const struct ebitmap *e2); +bool ebitmap_equal(const struct ebitmap *e1, const struct ebitmap *e2); int ebitmap_cpy(struct ebitmap *dst, const struct ebitmap *src); -int ebitmap_and(struct ebitmap *dst, const struct ebitmap *e1, const struct ebitmap *e2); -int ebitmap_contains(const struct ebitmap *e1, const struct ebitmap *e2, u32 last_e2bit); -int ebitmap_get_bit(const struct ebitmap *e, unsigned long bit); -int ebitmap_set_bit(struct ebitmap *e, unsigned long bit, int value); +int ebitmap_and(struct ebitmap *dst, const struct ebitmap *e1, + const struct ebitmap *e2); +int ebitmap_contains(const struct ebitmap *e1, const struct ebitmap *e2, + u32 last_e2bit); +int ebitmap_get_bit(const struct ebitmap *e, u32 bit); +int ebitmap_set_bit(struct ebitmap *e, u32 bit, int value); void ebitmap_destroy(struct ebitmap *e); -int ebitmap_read(struct ebitmap *e, void *fp); -int ebitmap_write(const struct ebitmap *e, void *fp); +struct policy_file; +int ebitmap_read(struct ebitmap *e, struct policy_file *fp); +int ebitmap_write(const struct ebitmap *e, struct policy_file *fp); u32 ebitmap_hash(const struct ebitmap *e, u32 hash); #ifdef CONFIG_NETLABEL @@ -151,4 +152,4 @@ static inline int ebitmap_netlbl_import(struct ebitmap *ebmap, } #endif -#endif /* _SS_EBITMAP_H_ */ +#endif /* _SS_EBITMAP_H_ */ |