[PATCH v3 03/22] ima: use "ima_hooks" enum as function argument
Dmitry Kasatkin
dmitry.kasatkin at gmail.com
Wed Feb 10 11:35:30 PST 2016
On Wed, Feb 3, 2016 at 9:06 PM, Mimi Zohar <zohar at linux.vnet.ibm.com> wrote:
> Cleanup the function arguments by using "ima_hooks" enumerator as needed.
>
> Signed-off-by: Mimi Zohar <zohar at linux.vnet.ibm.com>
Acked-by: Dmitry Kasatkin <dmitry.kasatkin at huawei.com>
> ---
> security/integrity/ima/ima.h | 25 +++++++++++++++++--------
> security/integrity/ima/ima_api.c | 6 +++---
> security/integrity/ima/ima_appraise.c | 13 +++++++------
> security/integrity/ima/ima_main.c | 14 +++++++-------
> security/integrity/ima/ima_policy.c | 6 +++---
> 5 files changed, 37 insertions(+), 27 deletions(-)
>
> diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h
> index fb8da36..b7e7935 100644
> --- a/security/integrity/ima/ima.h
> +++ b/security/integrity/ima/ima.h
> @@ -137,9 +137,18 @@ static inline unsigned long ima_hash_key(u8 *digest)
> return hash_long(*digest, IMA_HASH_BITS);
> }
>
> +enum ima_hooks {
> + FILE_CHECK = 1,
> + MMAP_CHECK,
> + BPRM_CHECK,
> + MODULE_CHECK,
> + FIRMWARE_CHECK,
> + POST_SETATTR
> +};
> +
> /* LIM API function definitions */
> -int ima_get_action(struct inode *inode, int mask, int function);
> -int ima_must_measure(struct inode *inode, int mask, int function);
> +int ima_get_action(struct inode *inode, int mask, enum ima_hooks func);
> +int ima_must_measure(struct inode *inode, int mask, enum ima_hooks func);
> int ima_collect_measurement(struct integrity_iint_cache *iint,
> struct file *file, enum hash_algo algo);
> void ima_store_measurement(struct integrity_iint_cache *iint, struct file *file,
> @@ -156,8 +165,6 @@ void ima_free_template_entry(struct ima_template_entry *entry);
> const char *ima_d_path(struct path *path, char **pathbuf);
>
> /* IMA policy related functions */
> -enum ima_hooks { FILE_CHECK = 1, MMAP_CHECK, BPRM_CHECK, MODULE_CHECK, FIRMWARE_CHECK, POST_SETATTR };
> -
> int ima_match_policy(struct inode *inode, enum ima_hooks func, int mask,
> int flags);
> void ima_init_policy(void);
> @@ -179,21 +186,22 @@ int ima_policy_show(struct seq_file *m, void *v);
> #define IMA_APPRAISE_FIRMWARE 0x10
>
> #ifdef CONFIG_IMA_APPRAISE
> -int ima_appraise_measurement(int func, struct integrity_iint_cache *iint,
> +int ima_appraise_measurement(enum ima_hooks func,
> + struct integrity_iint_cache *iint,
> struct file *file, const unsigned char *filename,
> struct evm_ima_xattr_data *xattr_value,
> int xattr_len, int opened);
> int ima_must_appraise(struct inode *inode, int mask, enum ima_hooks func);
> void ima_update_xattr(struct integrity_iint_cache *iint, struct file *file);
> enum integrity_status ima_get_cache_status(struct integrity_iint_cache *iint,
> - int func);
> + enum ima_hooks func);
> enum hash_algo ima_get_hash_algo(struct evm_ima_xattr_data *xattr_value,
> int xattr_len);
> int ima_read_xattr(struct dentry *dentry,
> struct evm_ima_xattr_data **xattr_value);
>
> #else
> -static inline int ima_appraise_measurement(int func,
> +static inline int ima_appraise_measurement(enum ima_hooks func,
> struct integrity_iint_cache *iint,
> struct file *file,
> const unsigned char *filename,
> @@ -215,7 +223,8 @@ static inline void ima_update_xattr(struct integrity_iint_cache *iint,
> }
>
> static inline enum integrity_status ima_get_cache_status(struct integrity_iint_cache
> - *iint, int func)
> + *iint,
> + enum ima_hooks func)
> {
> return INTEGRITY_UNKNOWN;
> }
> diff --git a/security/integrity/ima/ima_api.c b/security/integrity/ima/ima_api.c
> index e7c7a5d..8750254 100644
> --- a/security/integrity/ima/ima_api.c
> +++ b/security/integrity/ima/ima_api.c
> @@ -156,7 +156,7 @@ err_out:
> * ima_get_action - appraise & measure decision based on policy.
> * @inode: pointer to inode to measure
> * @mask: contains the permission mask (MAY_READ, MAY_WRITE, MAY_EXECUTE)
> - * @function: calling function (FILE_CHECK, BPRM_CHECK, MMAP_CHECK, MODULE_CHECK)
> + * @func: caller identifier
> *
> * The policy is defined in terms of keypairs:
> * subj=, obj=, type=, func=, mask=, fsmagic=
> @@ -168,13 +168,13 @@ err_out:
> * Returns IMA_MEASURE, IMA_APPRAISE mask.
> *
> */
> -int ima_get_action(struct inode *inode, int mask, int function)
> +int ima_get_action(struct inode *inode, int mask, enum ima_hooks func)
> {
> int flags = IMA_MEASURE | IMA_AUDIT | IMA_APPRAISE;
>
> flags &= ima_policy_flag;
>
> - return ima_match_policy(inode, function, mask, flags);
> + return ima_match_policy(inode, func, mask, flags);
> }
>
> /*
> diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c
> index 9c2b46b..2888449 100644
> --- a/security/integrity/ima/ima_appraise.c
> +++ b/security/integrity/ima/ima_appraise.c
> @@ -67,7 +67,7 @@ static int ima_fix_xattr(struct dentry *dentry,
>
> /* Return specific func appraised cached result */
> enum integrity_status ima_get_cache_status(struct integrity_iint_cache *iint,
> - int func)
> + enum ima_hooks func)
> {
> switch (func) {
> case MMAP_CHECK:
> @@ -85,7 +85,8 @@ enum integrity_status ima_get_cache_status(struct integrity_iint_cache *iint,
> }
>
> static void ima_set_cache_status(struct integrity_iint_cache *iint,
> - int func, enum integrity_status status)
> + enum ima_hooks func,
> + enum integrity_status status)
> {
> switch (func) {
> case MMAP_CHECK:
> @@ -103,11 +104,11 @@ static void ima_set_cache_status(struct integrity_iint_cache *iint,
> case FILE_CHECK:
> default:
> iint->ima_file_status = status;
> - break;
> }
> }
>
> -static void ima_cache_flags(struct integrity_iint_cache *iint, int func)
> +static void ima_cache_flags(struct integrity_iint_cache *iint,
> + enum ima_hooks func)
> {
> switch (func) {
> case MMAP_CHECK:
> @@ -125,7 +126,6 @@ static void ima_cache_flags(struct integrity_iint_cache *iint, int func)
> case FILE_CHECK:
> default:
> iint->flags |= (IMA_FILE_APPRAISED | IMA_APPRAISED);
> - break;
> }
> }
>
> @@ -185,7 +185,8 @@ int ima_read_xattr(struct dentry *dentry,
> *
> * Return 0 on success, error code otherwise
> */
> -int ima_appraise_measurement(int func, struct integrity_iint_cache *iint,
> +int ima_appraise_measurement(enum ima_hooks func,
> + struct integrity_iint_cache *iint,
> struct file *file, const unsigned char *filename,
> struct evm_ima_xattr_data *xattr_value,
> int xattr_len, int opened)
> diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
> index d9fc463..78a80c8 100644
> --- a/security/integrity/ima/ima_main.c
> +++ b/security/integrity/ima/ima_main.c
> @@ -153,8 +153,8 @@ void ima_file_free(struct file *file)
> ima_check_last_writer(iint, inode, file);
> }
>
> -static int process_measurement(struct file *file, int mask, int function,
> - int opened)
> +static int process_measurement(struct file *file, int mask,
> + enum ima_hooks func, int opened)
> {
> struct inode *inode = file_inode(file);
> struct integrity_iint_cache *iint = NULL;
> @@ -174,8 +174,8 @@ static int process_measurement(struct file *file, int mask, int function,
> * bitmask based on the appraise/audit/measurement policy.
> * Included is the appraise submask.
> */
> - action = ima_get_action(inode, mask, function);
> - violation_check = ((function == FILE_CHECK || function == MMAP_CHECK) &&
> + action = ima_get_action(inode, mask, func);
> + violation_check = ((func == FILE_CHECK || func == MMAP_CHECK) &&
> (ima_policy_flag & IMA_MEASURE));
> if (!action && !violation_check)
> return 0;
> @@ -184,7 +184,7 @@ static int process_measurement(struct file *file, int mask, int function,
>
> /* Is the appraise rule hook specific? */
> if (action & IMA_FILE_APPRAISE)
> - function = FILE_CHECK;
> + func = FILE_CHECK;
>
> mutex_lock(&inode->i_mutex);
>
> @@ -214,7 +214,7 @@ static int process_measurement(struct file *file, int mask, int function,
> /* Nothing to do, just return existing appraised status */
> if (!action) {
> if (must_appraise)
> - rc = ima_get_cache_status(iint, function);
> + rc = ima_get_cache_status(iint, func);
> goto out_digsig;
> }
>
> @@ -240,7 +240,7 @@ static int process_measurement(struct file *file, int mask, int function,
> ima_store_measurement(iint, file, pathname,
> xattr_value, xattr_len);
> if (action & IMA_APPRAISE_SUBMASK)
> - rc = ima_appraise_measurement(function, iint, file, pathname,
> + rc = ima_appraise_measurement(func, iint, file, pathname,
> xattr_value, xattr_len, opened);
> if (action & IMA_AUDIT)
> ima_audit_measurement(iint, pathname);
> diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c
> index 43b6425..b089ebe 100644
> --- a/security/integrity/ima/ima_policy.c
> +++ b/security/integrity/ima/ima_policy.c
> @@ -207,8 +207,8 @@ static void ima_lsm_update_rules(void)
> *
> * Returns true on rule match, false on failure.
> */
> -static bool ima_match_rules(struct ima_rule_entry *rule,
> - struct inode *inode, enum ima_hooks func, int mask)
> +static bool ima_match_rules(struct ima_rule_entry *rule, struct inode *inode,
> + enum ima_hooks func, int mask)
> {
> struct task_struct *tsk = current;
> const struct cred *cred = current_cred();
> @@ -289,7 +289,7 @@ retry:
> * In addition to knowing that we need to appraise the file in general,
> * we need to differentiate between calling hooks, for hook specific rules.
> */
> -static int get_subaction(struct ima_rule_entry *rule, int func)
> +static int get_subaction(struct ima_rule_entry *rule, enum ima_hooks func)
> {
> if (!(rule->flags & IMA_FUNC))
> return IMA_FILE_APPRAISE;
> --
> 2.1.0
>
--
Thanks,
Dmitry
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