diff options
Diffstat (limited to 'fs/sysfs/sysfs.h')
| -rw-r--r-- | fs/sysfs/sysfs.h | 25 |
1 files changed, 18 insertions, 7 deletions
diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h index e3aea92ebfa3..0af09fbfb3f6 100644 --- a/fs/sysfs/sysfs.h +++ b/fs/sysfs/sysfs.h @@ -90,8 +90,11 @@ struct sysfs_dirent { #define SYSFS_COPY_NAME (SYSFS_DIR | SYSFS_KOBJ_LINK) #define SYSFS_ACTIVE_REF (SYSFS_KOBJ_ATTR | SYSFS_KOBJ_BIN_ATTR) -#define SYSFS_FLAG_MASK ~SYSFS_TYPE_MASK -#define SYSFS_FLAG_HAS_NS 0x01000 +/* identify any namespace tag on sysfs_dirents */ +#define SYSFS_NS_TYPE_MASK 0xf00 +#define SYSFS_NS_TYPE_SHIFT 8 + +#define SYSFS_FLAG_MASK ~(SYSFS_NS_TYPE_MASK|SYSFS_TYPE_MASK) #define SYSFS_FLAG_REMOVED 0x02000 static inline unsigned int sysfs_type(struct sysfs_dirent *sd) @@ -99,6 +102,15 @@ static inline unsigned int sysfs_type(struct sysfs_dirent *sd) return sd->s_flags & SYSFS_TYPE_MASK; } +/* + * Return any namespace tags on this dirent. + * enum kobj_ns_type is defined in linux/kobject.h + */ +static inline enum kobj_ns_type sysfs_ns_type(struct sysfs_dirent *sd) +{ + return (sd->s_flags & SYSFS_NS_TYPE_MASK) >> SYSFS_NS_TYPE_SHIFT; +} + #ifdef CONFIG_DEBUG_LOCK_ALLOC #define sysfs_dirent_init_lockdep(sd) \ @@ -143,13 +155,12 @@ struct sysfs_addrm_cxt { */ /* - * Each sb is associated with one namespace tag, currently the network - * namespace of the task which mounted this sysfs instance. If multiple - * tags become necessary, make the following an array and compare - * sysfs_dirent tag against every entry. + * Each sb is associated with a set of namespace tags (i.e. + * the network namespace of the task which mounted this sysfs + * instance). */ struct sysfs_super_info { - void *ns; + void *ns[KOBJ_NS_TYPES]; }; #define sysfs_info(SB) ((struct sysfs_super_info *)(SB->s_fs_info)) extern struct sysfs_dirent sysfs_root; |