diff options
| author | Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> | 2010-02-11 09:41:58 +0900 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2010-02-15 09:00:16 +1100 |
| commit | bf24fb016c861b7f52be0c36c4cedd3e89afa2e2 (patch) | |
| tree | f485ca2e70d8305d9aaecf45b5fd929b68b971b2 /security/tomoyo/realpath.h | |
| parent | ca0b7df3374c5566468c17f26fa2dfd3fe3c6a37 (diff) | |
| download | blackbird-op-linux-bf24fb016c861b7f52be0c36c4cedd3e89afa2e2.tar.gz blackbird-op-linux-bf24fb016c861b7f52be0c36c4cedd3e89afa2e2.zip | |
TOMOYO: Add refcounter on string data.
Add refcounter to "struct tomoyo_name_entry" and replace tomoyo_save_name()
with tomoyo_get_name()/tomoyo_put_name() pair so that we can kfree() when
garbage collector is added.
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security/tomoyo/realpath.h')
| -rw-r--r-- | security/tomoyo/realpath.h | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/security/tomoyo/realpath.h b/security/tomoyo/realpath.h index da4f06ff6f8d..b94cb512adb5 100644 --- a/security/tomoyo/realpath.h +++ b/security/tomoyo/realpath.h @@ -43,7 +43,7 @@ bool tomoyo_memory_ok(void *ptr); * Keep the given name on the RAM. * The RAM is shared, so NEVER try to modify or kfree() the returned name. */ -const struct tomoyo_path_info *tomoyo_save_name(const char *name); +const struct tomoyo_path_info *tomoyo_get_name(const char *name); /* Check for memory usage. */ int tomoyo_read_memory_counter(struct tomoyo_io_buffer *head); @@ -54,4 +54,23 @@ int tomoyo_write_memory_quota(struct tomoyo_io_buffer *head); /* Initialize realpath related code. */ void __init tomoyo_realpath_init(void); +/* + * tomoyo_name_entry is a structure which is used for linking + * "struct tomoyo_path_info" into tomoyo_name_list . + */ +struct tomoyo_name_entry { + struct list_head list; + atomic_t users; + struct tomoyo_path_info entry; +}; + +static inline void tomoyo_put_name(const struct tomoyo_path_info *name) +{ + if (name) { + struct tomoyo_name_entry *ptr = + container_of(name, struct tomoyo_name_entry, entry); + atomic_dec(&ptr->users); + } +} + #endif /* !defined(_SECURITY_TOMOYO_REALPATH_H) */ |
