mirror of
https://github.com/torvalds/linux.git
synced 2024-11-01 09:41:44 +00:00
98f842e675
Assign a unique proc inode to each namespace, and use that inode number to ensure we only allocate at most one proc inode for every namespace in proc. A single proc inode per namespace allows userspace to test to see if two processes are in the same namespace. This has been a long requested feature and only blocked because a naive implementation would put the id in a global space and would ultimately require having a namespace for the names of namespaces, making migration and certain virtualization tricks impossible. We still don't have per superblock inode numbers for proc, which appears necessary for application unaware checkpoint/restart and migrations (if the application is using namespace file descriptors) but that is now allowd by the design if it becomes important. I have preallocated the ipc and uts initial proc inode numbers so their structures can be statically initialized. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
51 lines
1.2 KiB
C
51 lines
1.2 KiB
C
/*
|
|
* linux/init/version.c
|
|
*
|
|
* Copyright (C) 1992 Theodore Ts'o
|
|
*
|
|
* May be freely distributed as part of Linux.
|
|
*/
|
|
|
|
#include <generated/compile.h>
|
|
#include <linux/module.h>
|
|
#include <linux/uts.h>
|
|
#include <linux/utsname.h>
|
|
#include <generated/utsrelease.h>
|
|
#include <linux/version.h>
|
|
#include <linux/proc_fs.h>
|
|
|
|
#ifndef CONFIG_KALLSYMS
|
|
#define version(a) Version_ ## a
|
|
#define version_string(a) version(a)
|
|
|
|
extern int version_string(LINUX_VERSION_CODE);
|
|
int version_string(LINUX_VERSION_CODE);
|
|
#endif
|
|
|
|
struct uts_namespace init_uts_ns = {
|
|
.kref = {
|
|
.refcount = ATOMIC_INIT(2),
|
|
},
|
|
.name = {
|
|
.sysname = UTS_SYSNAME,
|
|
.nodename = UTS_NODENAME,
|
|
.release = UTS_RELEASE,
|
|
.version = UTS_VERSION,
|
|
.machine = UTS_MACHINE,
|
|
.domainname = UTS_DOMAINNAME,
|
|
},
|
|
.user_ns = &init_user_ns,
|
|
.proc_inum = PROC_UTS_INIT_INO,
|
|
};
|
|
EXPORT_SYMBOL_GPL(init_uts_ns);
|
|
|
|
/* FIXED STRINGS! Don't touch! */
|
|
const char linux_banner[] =
|
|
"Linux version " UTS_RELEASE " (" LINUX_COMPILE_BY "@"
|
|
LINUX_COMPILE_HOST ") (" LINUX_COMPILER ") " UTS_VERSION "\n";
|
|
|
|
const char linux_proc_banner[] =
|
|
"%s version %s"
|
|
" (" LINUX_COMPILE_BY "@" LINUX_COMPILE_HOST ")"
|
|
" (" LINUX_COMPILER ") %s\n";
|