mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-08-30 15:18:11 +02:00
Christian Brauner
660def10b0
No point in cargo-culting the same code across all the different types. Use one common initializer. Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Christian Brauner <brauner@kernel.org>
96 lines
2.4 KiB
C
96 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* procfs namespace bits
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*/
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#ifndef _LINUX_PROC_NS_H
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#define _LINUX_PROC_NS_H
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#include <linux/nsfs.h>
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#include <uapi/linux/nsfs.h>
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struct pid_namespace;
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struct nsset;
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struct path;
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struct task_struct;
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struct inode;
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struct proc_ns_operations {
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const char *name;
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const char *real_ns_name;
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int type;
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struct ns_common *(*get)(struct task_struct *task);
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void (*put)(struct ns_common *ns);
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int (*install)(struct nsset *nsset, struct ns_common *ns);
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struct user_namespace *(*owner)(struct ns_common *ns);
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struct ns_common *(*get_parent)(struct ns_common *ns);
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} __randomize_layout;
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extern const struct proc_ns_operations netns_operations;
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extern const struct proc_ns_operations utsns_operations;
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extern const struct proc_ns_operations ipcns_operations;
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extern const struct proc_ns_operations pidns_operations;
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extern const struct proc_ns_operations pidns_for_children_operations;
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extern const struct proc_ns_operations userns_operations;
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extern const struct proc_ns_operations mntns_operations;
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extern const struct proc_ns_operations cgroupns_operations;
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extern const struct proc_ns_operations timens_operations;
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extern const struct proc_ns_operations timens_for_children_operations;
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/*
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* We always define these enumerators
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*/
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enum {
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PROC_IPC_INIT_INO = IPC_NS_INIT_INO,
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PROC_UTS_INIT_INO = UTS_NS_INIT_INO,
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PROC_USER_INIT_INO = USER_NS_INIT_INO,
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PROC_PID_INIT_INO = PID_NS_INIT_INO,
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PROC_CGROUP_INIT_INO = CGROUP_NS_INIT_INO,
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PROC_TIME_INIT_INO = TIME_NS_INIT_INO,
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PROC_NET_INIT_INO = NET_NS_INIT_INO,
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PROC_MNT_INIT_INO = MNT_NS_INIT_INO,
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};
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#ifdef CONFIG_PROC_FS
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extern int proc_alloc_inum(unsigned int *pino);
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extern void proc_free_inum(unsigned int inum);
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#else /* CONFIG_PROC_FS */
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static inline int proc_alloc_inum(unsigned int *inum)
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{
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*inum = 1;
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return 0;
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}
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static inline void proc_free_inum(unsigned int inum) {}
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#endif /* CONFIG_PROC_FS */
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static inline int ns_alloc_inum(struct ns_common *ns)
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{
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WRITE_ONCE(ns->stashed, NULL);
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return proc_alloc_inum(&ns->inum);
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}
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static inline int ns_common_init(struct ns_common *ns,
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const struct proc_ns_operations *ops,
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bool alloc_inum)
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{
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if (alloc_inum) {
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int ret;
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ret = proc_alloc_inum(&ns->inum);
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if (ret)
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return ret;
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}
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refcount_set(&ns->count, 1);
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ns->stashed = NULL;
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ns->ops = ops;
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return 0;
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}
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#define ns_free_inum(ns) proc_free_inum((ns)->inum)
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#define get_proc_ns(inode) ((struct ns_common *)(inode)->i_private)
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#endif /* _LINUX_PROC_NS_H */
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