diff options
Diffstat (limited to 'include/linux/fanotify.h')
| -rw-r--r-- | include/linux/fanotify.h | 33 |
1 files changed, 28 insertions, 5 deletions
diff --git a/include/linux/fanotify.h b/include/linux/fanotify.h index 031a97d8369a..bad41bcb25df 100644 --- a/include/linux/fanotify.h +++ b/include/linux/fanotify.h @@ -18,15 +18,38 @@ extern struct ctl_table fanotify_table[]; /* for sysctl */ * these constant, the programs may break if re-compiled with new uapi headers * and then run on an old kernel. */ -#define FANOTIFY_CLASS_BITS (FAN_CLASS_NOTIF | FAN_CLASS_CONTENT | \ + +/* Group classes where permission events are allowed */ +#define FANOTIFY_PERM_CLASSES (FAN_CLASS_CONTENT | \ FAN_CLASS_PRE_CONTENT) +#define FANOTIFY_CLASS_BITS (FAN_CLASS_NOTIF | FANOTIFY_PERM_CLASSES) + #define FANOTIFY_FID_BITS (FAN_REPORT_FID | FAN_REPORT_DFID_NAME) -#define FANOTIFY_INIT_FLAGS (FANOTIFY_CLASS_BITS | FANOTIFY_FID_BITS | \ - FAN_REPORT_TID | \ - FAN_CLOEXEC | FAN_NONBLOCK | \ - FAN_UNLIMITED_QUEUE | FAN_UNLIMITED_MARKS) +/* + * fanotify_init() flags that require CAP_SYS_ADMIN. + * We do not allow unprivileged groups to request permission events. + * We do not allow unprivileged groups to get other process pid in events. + * We do not allow unprivileged groups to use unlimited resources. + */ +#define FANOTIFY_ADMIN_INIT_FLAGS (FANOTIFY_PERM_CLASSES | \ + FAN_REPORT_TID | \ + FAN_UNLIMITED_QUEUE | \ + FAN_UNLIMITED_MARKS) + +/* + * fanotify_init() flags that are allowed for user without CAP_SYS_ADMIN. + * FAN_CLASS_NOTIF is the only class we allow for unprivileged group. + * We do not allow unprivileged groups to get file descriptors in events, + * so one of the flags for reporting file handles is required. + */ +#define FANOTIFY_USER_INIT_FLAGS (FAN_CLASS_NOTIF | \ + FANOTIFY_FID_BITS | \ + FAN_CLOEXEC | FAN_NONBLOCK) + +#define FANOTIFY_INIT_FLAGS (FANOTIFY_ADMIN_INIT_FLAGS | \ + FANOTIFY_USER_INIT_FLAGS) #define FANOTIFY_MARK_TYPE_BITS (FAN_MARK_INODE | FAN_MARK_MOUNT | \ FAN_MARK_FILESYSTEM) |