diff options
Diffstat (limited to 'include/linux/cgroup.h')
| -rw-r--r-- | include/linux/cgroup.h | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index c5f3684ef557..c5a170ca4a48 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -515,6 +515,15 @@ struct cftype { */ int (*trigger)(struct cgroup_subsys_state *css, unsigned int event); + /* + * write() is the generic write callback which maps directly to + * kernfs write operation and overrides all other operations. + * Maximum write size is determined by ->max_write_len. Use + * of_css/cft() to access the associated css and cft. + */ + ssize_t (*write)(struct kernfs_open_file *of, + char *buf, size_t nbytes, loff_t off); + #ifdef CONFIG_DEBUG_LOCK_ALLOC struct lock_class_key lockdep_key; #endif @@ -552,14 +561,24 @@ static inline ino_t cgroup_ino(struct cgroup *cgrp) return 0; } -static inline struct cftype *seq_cft(struct seq_file *seq) +/* cft/css accessors for cftype->write() operation */ +static inline struct cftype *of_cft(struct kernfs_open_file *of) { - struct kernfs_open_file *of = seq->private; - return of->kn->priv; } -struct cgroup_subsys_state *seq_css(struct seq_file *seq); +struct cgroup_subsys_state *of_css(struct kernfs_open_file *of); + +/* cft/css accessors for cftype->seq_*() operations */ +static inline struct cftype *seq_cft(struct seq_file *seq) +{ + return of_cft(seq->private); +} + +static inline struct cgroup_subsys_state *seq_css(struct seq_file *seq) +{ + return of_css(seq->private); +} /* * Name / path handling functions. All are thin wrappers around the kernfs |