diff options
| author | Christian Brauner <brauner@kernel.org> | 2025-09-19 10:14:45 +0200 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2025-09-19 16:22:36 +0200 |
| commit | bb57289f0ce1bab7c9ea2106a29088088dc95229 (patch) | |
| tree | a40d44f79e5762729dee07a3ee2373eb74568ec5 /include/linux/ns_common.h | |
| parent | 3ab378cfa793c648d4edf02bbfff3af8715aca91 (diff) | |
| parent | be5f21d3985f00827e09b798f7a07ebd6dd7f54a (diff) | |
Merge patch series "ns: rework common initialization"
Christian Brauner <brauner@kernel.org> says:
The current scheme still involves a lot of open-coding and copy-pasing
and bleeds a lot of unnecessary details into actual namespace
implementers. Encapsulate it in the common helpers and simplify it all.
* patches from https://lore.kernel.org/20250917-work-namespace-ns_common-v1-0-1b3bda8ef8f2@kernel.org:
ns: add ns_common_free()
nscommon: simplify initialization
net: centralize ns_common initialization
mnt: simplify ns_common_init() handling
nsfs: add inode number for anon namespace
cgroup: split namespace into separate header
nscommon: move to separate file
mnt: expose pointer to init_mnt_ns
uts: split namespace into separate header
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'include/linux/ns_common.h')
| -rw-r--r-- | include/linux/ns_common.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/include/linux/ns_common.h b/include/linux/ns_common.h index 7224072cccc5..19833ac547f9 100644 --- a/include/linux/ns_common.h +++ b/include/linux/ns_common.h @@ -16,6 +16,15 @@ struct time_namespace; struct user_namespace; struct uts_namespace; +extern struct cgroup_namespace init_cgroup_ns; +extern struct ipc_namespace init_ipc_ns; +extern struct mnt_namespace init_mnt_ns; +extern struct net init_net; +extern struct pid_namespace init_pid_ns; +extern struct time_namespace init_time_ns; +extern struct user_namespace init_user_ns; +extern struct uts_namespace init_uts_ns; + struct ns_common { struct dentry *stashed; const struct proc_ns_operations *ops; @@ -31,6 +40,9 @@ struct ns_common { }; }; +int __ns_common_init(struct ns_common *ns, const struct proc_ns_operations *ops, int inum); +void __ns_common_free(struct ns_common *ns); + #define to_ns_common(__ns) \ _Generic((__ns), \ struct cgroup_namespace *: &(__ns)->ns, \ @@ -42,4 +54,33 @@ struct ns_common { struct user_namespace *: &(__ns)->ns, \ struct uts_namespace *: &(__ns)->ns) +#define ns_init_inum(__ns) \ + _Generic((__ns), \ + struct cgroup_namespace *: CGROUP_NS_INIT_INO, \ + struct ipc_namespace *: IPC_NS_INIT_INO, \ + struct mnt_namespace *: MNT_NS_INIT_INO, \ + struct net *: NET_NS_INIT_INO, \ + struct pid_namespace *: PID_NS_INIT_INO, \ + struct time_namespace *: TIME_NS_INIT_INO, \ + struct user_namespace *: USER_NS_INIT_INO, \ + struct uts_namespace *: UTS_NS_INIT_INO) + +#define ns_init_ns(__ns) \ + _Generic((__ns), \ + struct cgroup_namespace *: &init_cgroup_ns, \ + struct ipc_namespace *: &init_ipc_ns, \ + struct mnt_namespace *: &init_mnt_ns, \ + struct net *: &init_net, \ + struct pid_namespace *: &init_pid_ns, \ + struct time_namespace *: &init_time_ns, \ + struct user_namespace *: &init_user_ns, \ + struct uts_namespace *: &init_uts_ns) + +#define ns_common_init(__ns, __ops) \ + __ns_common_init(to_ns_common(__ns), __ops, (((__ns) == ns_init_ns(__ns)) ? ns_init_inum(__ns) : 0)) + +#define ns_common_init_inum(__ns, __ops, __inum) __ns_common_init(to_ns_common(__ns), __ops, __inum) + +#define ns_common_free(__ns) __ns_common_free(to_ns_common((__ns))) + #endif |