diff options
Diffstat (limited to 'include/linux/cgroup-defs.h')
| -rw-r--r-- | include/linux/cgroup-defs.h | 40 |
1 files changed, 39 insertions, 1 deletions
diff --git a/include/linux/cgroup-defs.h b/include/linux/cgroup-defs.h index 5e1694fe035b..77258d276f93 100644 --- a/include/linux/cgroup-defs.h +++ b/include/linux/cgroup-defs.h @@ -32,6 +32,7 @@ struct kernfs_node; struct kernfs_ops; struct kernfs_open_file; struct seq_file; +struct poll_table_struct; #define MAX_CGROUP_TYPE_NAMELEN 32 #define MAX_CGROUP_ROOT_NAMELEN 64 @@ -64,6 +65,12 @@ enum { * specified at mount time and thus is implemented here. */ CGRP_CPUSET_CLONE_CHILDREN, + + /* Control group has to be frozen. */ + CGRP_FREEZE, + + /* Cgroup is frozen. */ + CGRP_FROZEN, }; /* cgroup_root->flags */ @@ -92,6 +99,7 @@ enum { CFTYPE_NO_PREFIX = (1 << 3), /* (DON'T USE FOR NEW FILES) no subsys prefix */ CFTYPE_WORLD_WRITABLE = (1 << 4), /* (DON'T USE FOR NEW FILES) S_IWUGO */ + CFTYPE_DEBUG = (1 << 5), /* create when cgroup_debug */ /* internal flags, do not use outside cgroup core proper */ __CFTYPE_ONLY_ON_DFL = (1 << 16), /* only on default hierarchy */ @@ -315,6 +323,25 @@ struct cgroup_rstat_cpu { struct cgroup *updated_next; /* NULL iff not on the list */ }; +struct cgroup_freezer_state { + /* Should the cgroup and its descendants be frozen. */ + bool freeze; + + /* Should the cgroup actually be frozen? */ + int e_freeze; + + /* Fields below are protected by css_set_lock */ + + /* Number of frozen descendant cgroups */ + int nr_frozen_descendants; + + /* + * Number of tasks, which are counted as frozen: + * frozen, SIGSTOPped, and PTRACEd. + */ + int nr_frozen_tasks; +}; + struct cgroup { /* self css with NULL ->ss, points back to this cgroup */ struct cgroup_subsys_state self; @@ -347,6 +374,11 @@ struct cgroup { * Dying cgroups are cgroups which were deleted by a user, * but are still existing because someone else is holding a reference. * max_descendants is a maximum allowed number of descent cgroups. + * + * nr_descendants and nr_dying_descendants are protected + * by cgroup_mutex and css_set_lock. It's fine to read them holding + * any of cgroup_mutex and css_set_lock; for writing both locks + * should be held. */ int nr_descendants; int nr_dying_descendants; @@ -446,6 +478,9 @@ struct cgroup { /* If there is block congestion on this cgroup. */ atomic_t congestion_count; + /* Used to store internal freezer state */ + struct cgroup_freezer_state freezer; + /* ids of the ancestors at each level including self */ int ancestor_ids[]; }; @@ -573,6 +608,9 @@ struct cftype { ssize_t (*write)(struct kernfs_open_file *of, char *buf, size_t nbytes, loff_t off); + __poll_t (*poll)(struct kernfs_open_file *of, + struct poll_table_struct *pt); + #ifdef CONFIG_DEBUG_LOCK_ALLOC struct lock_class_key lockdep_key; #endif @@ -601,7 +639,7 @@ struct cgroup_subsys { void (*cancel_fork)(struct task_struct *task); void (*fork)(struct task_struct *task); void (*exit)(struct task_struct *task); - void (*free)(struct task_struct *task); + void (*release)(struct task_struct *task); void (*bind)(struct cgroup_subsys_state *root_css); bool early_init:1; |