diff options
author | Al Viro <viro@zeniv.linux.org.uk> | 2019-01-17 07:42:38 +0300 |
---|---|---|
committer | Al Viro <viro@zeniv.linux.org.uk> | 2019-02-28 11:29:30 +0300 |
commit | f5dfb5315d340abd71bec523be9b114d5ac410de (patch) | |
tree | b2bbeb90606b63e904bc309bb7f18c29cfd7b1c9 /kernel/cgroup/cgroup-internal.h | |
parent | 7feeef58690a5ea8c5033d43e696ef41b28d82eb (diff) | |
download | linux-f5dfb5315d340abd71bec523be9b114d5ac410de.tar.xz |
cgroup: take options parsing into ->parse_monolithic()
Store the results in cgroup_fs_context. There's a nasty twist caused
by the enabling/disabling subsystems - we can't do the checks sensitive
to that until cgroup_mutex gets grabbed. Frankly, these checks are
complete bullshit (e.g. all,none combination is accepted if all subsystems
are disabled; so's cpusets,none and all,cpusets when cpusets is disabled,
etc.), but touching that would be a userland-visible behaviour change ;-/
So we do parsing in ->parse_monolithic() and have the consistency checks
done in check_cgroupfs_options(), with the latter called (on already parsed
options) from cgroup1_get_tree() and cgroup1_reconfigure().
Freeing the strdup'ed strings is done from fs_context destructor, which
somewhat simplifies the life for cgroup1_{get_tree,reconfigure}().
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel/cgroup/cgroup-internal.h')
-rw-r--r-- | kernel/cgroup/cgroup-internal.h | 23 |
1 files changed, 11 insertions, 12 deletions
diff --git a/kernel/cgroup/cgroup-internal.h b/kernel/cgroup/cgroup-internal.h index 37836d598ff8..e627ff193dba 100644 --- a/kernel/cgroup/cgroup-internal.h +++ b/kernel/cgroup/cgroup-internal.h @@ -41,7 +41,15 @@ extern void __init enable_debug_cgroup(void); * The cgroup filesystem superblock creation/mount context. */ struct cgroup_fs_context { - char *data; + unsigned int flags; /* CGRP_ROOT_* flags */ + + /* cgroup1 bits */ + bool cpuset_clone_children; + bool none; /* User explicitly requested empty subsystem */ + bool all_ss; /* Seen 'all' option */ + u16 subsys_mask; /* Selected subsystems */ + char *name; /* Hierarchy name */ + char *release_agent; /* Path for release notifications */ }; static inline struct cgroup_fs_context *cgroup_fc2context(struct fs_context *fc) @@ -130,16 +138,6 @@ struct cgroup_mgctx { #define DEFINE_CGROUP_MGCTX(name) \ struct cgroup_mgctx name = CGROUP_MGCTX_INIT(name) -struct cgroup_sb_opts { - u16 subsys_mask; - unsigned int flags; - char *release_agent; - bool cpuset_clone_children; - char *name; - /* User explicitly requested empty subsystem */ - bool none; -}; - extern struct mutex cgroup_mutex; extern spinlock_t css_set_lock; extern struct cgroup_subsys *cgroup_subsys[]; @@ -210,7 +208,7 @@ int cgroup_path_ns_locked(struct cgroup *cgrp, char *buf, size_t buflen, struct cgroup_namespace *ns); void cgroup_free_root(struct cgroup_root *root); -void init_cgroup_root(struct cgroup_root *root, struct cgroup_sb_opts *opts); +void init_cgroup_root(struct cgroup_root *root, struct cgroup_fs_context *ctx); int cgroup_setup_root(struct cgroup_root *root, u16 ss_mask); int rebind_subsystems(struct cgroup_root *dst_root, u16 ss_mask); struct dentry *cgroup_do_mount(struct file_system_type *fs_type, int flags, @@ -266,6 +264,7 @@ void cgroup1_pidlist_destroy_all(struct cgroup *cgrp); void cgroup1_release_agent(struct work_struct *work); void cgroup1_check_for_release(struct cgroup *cgrp); int cgroup1_get_tree(struct fs_context *fc); +int parse_cgroup1_options(char *data, struct cgroup_fs_context *ctx); int cgroup1_reconfigure(struct fs_context *ctx); #endif /* __CGROUP_INTERNAL_H */ |