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[PATCH] identifier to nsproxy 

Add an identifier to nsproxy.  The default init_ns_proxy has identifier 0 and
allocated nsproxies are given -1.

This identifier will be used by a new syscall sys_bind_ns.

Signed-off-by: Cedric Le Goater <clg@fr.ibm.com>
Cc: Kirill Korotaev <dev@openvz.org>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Herbert Poetzl <herbert@13thfloor.at>
Cc: Sukadev Bhattiprolu <sukadev@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Cedric Le Goater 2006-12-08 02:37:57 -08:00 committed by Linus Torvalds
parent 6b3286ed11
commit 373beb35cd
3 changed files with 5 additions and 1 deletions
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1
include/linux/init_task.h
View File

@ -75,6 +75,7 @@ extern struct nsproxy init_nsproxy;
#define INIT_NSPROXY(nsproxy) { \ #define INIT_NSPROXY(nsproxy) { \
.count = ATOMIC_INIT(1), \ .count = ATOMIC_INIT(1), \
.nslock = __SPIN_LOCK_UNLOCKED(nsproxy.nslock), \ .nslock = __SPIN_LOCK_UNLOCKED(nsproxy.nslock), \
.id = 0, \
.uts_ns = &init_uts_ns, \ .uts_ns = &init_uts_ns, \
.mnt_ns = NULL, \ .mnt_ns = NULL, \
INIT_IPC_NS(ipc_ns) \ INIT_IPC_NS(ipc_ns) \

1
include/linux/nsproxy.h
View File

@ -23,6 +23,7 @@ struct ipc_namespace;
struct nsproxy { struct nsproxy {
atomic_t count; atomic_t count;
spinlock_t nslock; spinlock_t nslock;
unsigned long id;
struct uts_namespace *uts_ns; struct uts_namespace *uts_ns;
struct ipc_namespace *ipc_ns; struct ipc_namespace *ipc_ns;
struct mnt_namespace *mnt_ns; struct mnt_namespace *mnt_ns;

4
kernel/nsproxy.c
View File

@ -45,8 +45,10 @@ static inline struct nsproxy *clone_namespaces(struct nsproxy *orig)
struct nsproxy *ns; struct nsproxy *ns;
ns = kmemdup(orig, sizeof(struct nsproxy), GFP_KERNEL); ns = kmemdup(orig, sizeof(struct nsproxy), GFP_KERNEL);
if (ns) if (ns) {
atomic_set(&ns->count, 1); atomic_set(&ns->count, 1);
ns->id = -1;
}
return ns; return ns;
} }