Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=faacbfd3a6808bf87d8f353b42eceeaba2c78a47
Commit: faacbfd3a6808bf87d8f353b42eceeaba2c78a47
Parent: 4c3f2ead5a3dff9069a45560ba4d007c8ae2e2ee
Author: Pavel Emelyanov <[EMAIL PROTECTED]>
AuthorDate: Thu Oct 18 23:40:04 2007 -0700
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Fri Oct 19 11:53:38 2007 -0700
pid namespaces: add support for pid namespaces hierarchy
Each namespace has a parent and is characterized by its "level". Level is
the
number of the namespace generation. E.g. init namespace has level 0, after
cloning new one it will have level 1, the next one - 2 and so on and so
forth.
This level is not explicitly limited.
True hierarchy must have some way to find each namespace's children, but it
is
not used in the patches, so this ability is not added (yet).
Signed-off-by: Pavel Emelyanov <[EMAIL PROTECTED]>
Cc: Oleg Nesterov <[EMAIL PROTECTED]>
Cc: Sukadev Bhattiprolu <[EMAIL PROTECTED]>
Cc: Paul Menage <[EMAIL PROTECTED]>
Cc: "Eric W. Biederman" <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
include/linux/pid_namespace.h | 2 ++
kernel/pid.c | 3 ++-
2 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/include/linux/pid_namespace.h b/include/linux/pid_namespace.h
index aea13ec..14376eb 100644
--- a/include/linux/pid_namespace.h
+++ b/include/linux/pid_namespace.h
@@ -21,6 +21,8 @@ struct pid_namespace {
int last_pid;
struct task_struct *child_reaper;
struct kmem_cache *pid_cachep;
+ int level;
+ struct pid_namespace *parent;
};
extern struct pid_namespace init_pid_ns;
diff --git a/kernel/pid.c b/kernel/pid.c
index bb07851..c7346fb 100644
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -67,7 +67,8 @@ struct pid_namespace init_pid_ns = {
[ 0 ... PIDMAP_ENTRIES-1] = { ATOMIC_INIT(BITS_PER_PAGE), NULL }
},
.last_pid = 0,
- .child_reaper = &init_task
+ .level = 0,
+ .child_reaper = &init_task,
};
int is_global_init(struct task_struct *tsk)
-
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