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| author | Eric W. Biederman <ebiederm@xmission.com> | 2012-07-26 04:02:49 -0700 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2012-11-20 04:17:43 -0800 |
| commit | bcf58e725ddc45d31addbc6627d4f0edccc824c1 (patch) | |
| tree | e6dff2fbed40f26d8c45f78e23a7476527573bf1 /kernel/utsname.c | |
| parent | 142e1d1d5f088e7a38659daca6e84a730967774a (diff) | |
| download | lwn-bcf58e725ddc45d31addbc6627d4f0edccc824c1.tar.gz lwn-bcf58e725ddc45d31addbc6627d4f0edccc824c1.zip | |
userns: Make create_new_namespaces take a user_ns parameter
Modify create_new_namespaces to explicitly take a user namespace
parameter, instead of implicitly through the task_struct.
This allows an implementation of unshare(CLONE_NEWUSER) where
the new user namespace is not stored onto the current task_struct
until after all of the namespaces are created.
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'kernel/utsname.c')
| -rw-r--r-- | kernel/utsname.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/kernel/utsname.c b/kernel/utsname.c index 4a9362f9325d..fdc619eb61ef 100644 --- a/kernel/utsname.c +++ b/kernel/utsname.c @@ -32,7 +32,7 @@ static struct uts_namespace *create_uts_ns(void) * @old_ns: namespace to clone * Return NULL on error (failure to kmalloc), new ns otherwise */ -static struct uts_namespace *clone_uts_ns(struct task_struct *tsk, +static struct uts_namespace *clone_uts_ns(struct user_namespace *user_ns, struct uts_namespace *old_ns) { struct uts_namespace *ns; @@ -43,7 +43,7 @@ static struct uts_namespace *clone_uts_ns(struct task_struct *tsk, down_read(&uts_sem); memcpy(&ns->name, &old_ns->name, sizeof(ns->name)); - ns->user_ns = get_user_ns(task_cred_xxx(tsk, user_ns)); + ns->user_ns = get_user_ns(user_ns); up_read(&uts_sem); return ns; } @@ -55,9 +55,8 @@ static struct uts_namespace *clone_uts_ns(struct task_struct *tsk, * versa. */ struct uts_namespace *copy_utsname(unsigned long flags, - struct task_struct *tsk) + struct user_namespace *user_ns, struct uts_namespace *old_ns) { - struct uts_namespace *old_ns = tsk->nsproxy->uts_ns; struct uts_namespace *new_ns; BUG_ON(!old_ns); @@ -66,7 +65,7 @@ struct uts_namespace *copy_utsname(unsigned long flags, if (!(flags & CLONE_NEWUTS)) return old_ns; - new_ns = clone_uts_ns(tsk, old_ns); + new_ns = clone_uts_ns(user_ns, old_ns); put_uts_ns(old_ns); return new_ns; |