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1592c9b223
Now that the v1 mount code is split into separate functions, move them to kernel/cgroup/cgroup-v1.c along with the mount option handling code. As this puts all v1-only kernfs_syscall_ops in cgroup-v1.c, move cgroup1_kf_syscall_ops to cgroup-v1.c too. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Acked-by: Zefan Li <lizefan@huawei.com>
126 lines
4.3 KiB
C
126 lines
4.3 KiB
C
#ifndef __CGROUP_INTERNAL_H
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#define __CGROUP_INTERNAL_H
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#include <linux/cgroup.h>
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#include <linux/kernfs.h>
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#include <linux/workqueue.h>
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#include <linux/list.h>
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/*
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* A cgroup can be associated with multiple css_sets as different tasks may
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* belong to different cgroups on different hierarchies. In the other
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* direction, a css_set is naturally associated with multiple cgroups.
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* This M:N relationship is represented by the following link structure
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* which exists for each association and allows traversing the associations
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* from both sides.
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*/
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struct cgrp_cset_link {
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/* the cgroup and css_set this link associates */
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struct cgroup *cgrp;
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struct css_set *cset;
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/* list of cgrp_cset_links anchored at cgrp->cset_links */
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struct list_head cset_link;
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/* list of cgrp_cset_links anchored at css_set->cgrp_links */
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struct list_head cgrp_link;
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};
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struct cgroup_sb_opts {
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u16 subsys_mask;
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unsigned int flags;
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char *release_agent;
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bool cpuset_clone_children;
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char *name;
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/* User explicitly requested empty subsystem */
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bool none;
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};
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extern struct mutex cgroup_mutex;
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extern spinlock_t css_set_lock;
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extern struct cgroup_subsys *cgroup_subsys[];
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extern struct list_head cgroup_roots;
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extern struct file_system_type cgroup_fs_type;
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/* iterate across the hierarchies */
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#define for_each_root(root) \
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list_for_each_entry((root), &cgroup_roots, root_list)
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/**
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* for_each_subsys - iterate all enabled cgroup subsystems
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* @ss: the iteration cursor
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* @ssid: the index of @ss, CGROUP_SUBSYS_COUNT after reaching the end
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*/
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#define for_each_subsys(ss, ssid) \
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for ((ssid) = 0; (ssid) < CGROUP_SUBSYS_COUNT && \
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(((ss) = cgroup_subsys[ssid]) || true); (ssid)++)
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static inline bool cgroup_is_dead(const struct cgroup *cgrp)
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{
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return !(cgrp->self.flags & CSS_ONLINE);
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}
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static inline bool notify_on_release(const struct cgroup *cgrp)
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{
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return test_bit(CGRP_NOTIFY_ON_RELEASE, &cgrp->flags);
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}
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bool cgroup_ssid_enabled(int ssid);
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bool cgroup_on_dfl(const struct cgroup *cgrp);
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struct cgroup_root *cgroup_root_from_kf(struct kernfs_root *kf_root);
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struct cgroup *task_cgroup_from_root(struct task_struct *task,
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struct cgroup_root *root);
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struct cgroup *cgroup_kn_lock_live(struct kernfs_node *kn, bool drain_offline);
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void cgroup_kn_unlock(struct kernfs_node *kn);
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int cgroup_path_ns_locked(struct cgroup *cgrp, char *buf, size_t buflen,
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struct cgroup_namespace *ns);
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void cgroup_free_root(struct cgroup_root *root);
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void init_cgroup_root(struct cgroup_root *root, struct cgroup_sb_opts *opts);
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int cgroup_setup_root(struct cgroup_root *root, u16 ss_mask);
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int rebind_subsystems(struct cgroup_root *dst_root, u16 ss_mask);
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struct dentry *cgroup_do_mount(struct file_system_type *fs_type, int flags,
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struct cgroup_root *root, unsigned long magic,
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struct cgroup_namespace *ns);
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bool cgroup_may_migrate_to(struct cgroup *dst_cgrp);
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void cgroup_migrate_finish(struct list_head *preloaded_csets);
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void cgroup_migrate_add_src(struct css_set *src_cset,
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struct cgroup *dst_cgrp,
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struct list_head *preloaded_csets);
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int cgroup_migrate_prepare_dst(struct list_head *preloaded_csets);
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int cgroup_migrate(struct task_struct *leader, bool threadgroup,
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struct cgroup_root *root);
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int cgroup_attach_task(struct cgroup *dst_cgrp, struct task_struct *leader,
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bool threadgroup);
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ssize_t __cgroup_procs_write(struct kernfs_open_file *of, char *buf,
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size_t nbytes, loff_t off, bool threadgroup);
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ssize_t cgroup_procs_write(struct kernfs_open_file *of, char *buf, size_t nbytes,
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loff_t off);
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void cgroup_lock_and_drain_offline(struct cgroup *cgrp);
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int cgroup_mkdir(struct kernfs_node *parent_kn, const char *name, umode_t mode);
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int cgroup_rmdir(struct kernfs_node *kn);
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int cgroup_show_path(struct seq_file *sf, struct kernfs_node *kf_node,
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struct kernfs_root *kf_root);
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/*
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* cgroup-v1.c
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*/
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extern struct cftype cgroup_legacy_base_files[];
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extern const struct file_operations proc_cgroupstats_operations;
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extern struct kernfs_syscall_ops cgroup1_kf_syscall_ops;
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bool cgroup_ssid_no_v1(int ssid);
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void cgroup_pidlist_destroy_all(struct cgroup *cgrp);
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void cgroup_release_agent(struct work_struct *work);
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void check_for_release(struct cgroup *cgrp);
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struct dentry *cgroup1_mount(struct file_system_type *fs_type, int flags,
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void *data, unsigned long magic,
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struct cgroup_namespace *ns);
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#endif /* __CGROUP_INTERNAL_H */
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