diff options
Diffstat (limited to 'block/blk-cgroup.h')
| -rw-r--r-- | block/blk-cgroup.h | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/block/blk-cgroup.h b/block/blk-cgroup.h index ef6550a67a69..c524267e4f7f 100644 --- a/block/blk-cgroup.h +++ b/block/blk-cgroup.h @@ -77,8 +77,6 @@ struct blkio_group { struct list_head q_node; struct hlist_node blkcg_node; struct blkio_cgroup *blkcg; - /* Store cgroup path */ - char path[128]; /* reference count */ int refcnt; @@ -167,9 +165,24 @@ static inline struct blkio_group *pdata_to_blkg(void *pdata) return NULL; } -static inline char *blkg_path(struct blkio_group *blkg) +/** + * blkg_path - format cgroup path of blkg + * @blkg: blkg of interest + * @buf: target buffer + * @buflen: target buffer length + * + * Format the path of the cgroup of @blkg into @buf. + */ +static inline int blkg_path(struct blkio_group *blkg, char *buf, int buflen) { - return blkg->path; + int ret; + + rcu_read_lock(); + ret = cgroup_path(blkg->blkcg->css.cgroup, buf, buflen); + rcu_read_unlock(); + if (ret) + strncpy(buf, "<unavailable>", buflen); + return ret; } /** |