[PATCH V2 04/10] cgroup: add owner name to cftypes
From: Paolo Valente <hidden>
Date: 2018-11-19 10:34:51
Also in:
linux-block, linux-doc, lkml
Subsystem:
control group (cgroup), the rest · Maintainers:
Tejun Heo, Johannes Weiner, Michal Koutný, Linus Torvalds
From: Angelo Ruocco <redacted> The piece of information "who created a certain cftype" is not stored anywhere, thus a cftype is not able to know who is its owner. This commit addresses this problem by adding a new field in the cftype structure that enables the name of its owner to be explicitly set. Signed-off-by: Angelo Ruocco <redacted> Signed-off-by: Paolo Valente <redacted> --- include/linux/cgroup-defs.h | 2 ++ include/linux/cgroup.h | 13 +++++++++++++ 2 files changed, 15 insertions(+)
diff --git a/include/linux/cgroup-defs.h b/include/linux/cgroup-defs.h
index d659763c7221..6e31f478c6e1 100644
--- a/include/linux/cgroup-defs.h
+++ b/include/linux/cgroup-defs.h@@ -36,6 +36,7 @@ struct seq_file; #define MAX_CGROUP_TYPE_NAMELEN 32 #define MAX_CGROUP_ROOT_NAMELEN 64 #define MAX_CFTYPE_NAME 64 +#define MAX_OWNER_NAME 64 /* define the enumeration of all cgroup subsystems */ #define SUBSYS(_x) _x ## _cgrp_id,
@@ -505,6 +506,7 @@ struct cftype { * end of cftype array. */ char name[MAX_CFTYPE_NAME]; + char owner_name[MAX_OWNER_NAME]; unsigned long private; /*
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index 9d12757a65b0..267153bd898a 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h@@ -291,6 +291,19 @@ void css_task_iter_end(struct css_task_iter *it); ; \ else +/** + * list_for_each_cft - walk circular list of cftypes linked together + * @cft: cftype from where to start + * @n: cftype used as a temporary storage + * + * A cftype pointed by a file may be part of a circular list of cftypes, this + * macro walks the circular list starting from any given cftype. Unlike the + * "list_for_each_entry" macro, the first element is included in the iteration. + */ +#define list_for_each_cft(cft, n) \ + for (n = NULL; cft != n; n = (n == NULL) ? cft : n, \ + cft = list_next_entry(cft, share_node)) + /* * Inline functions. */
--
2.16.1