diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/fork.c | 22 | ||||
| -rw-r--r-- | kernel/nsproxy.c | 41 |
2 files changed, 46 insertions, 17 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index 208dd99f13b..d6cc5655850 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1608,13 +1608,15 @@ asmlinkage long sys_unshare(unsigned long unshare_flags) struct sem_undo_list *new_ulist = NULL; struct nsproxy *new_nsproxy = NULL, *old_nsproxy = NULL; struct uts_namespace *uts, *new_uts = NULL; + struct ipc_namespace *ipc, *new_ipc = NULL; check_unshare_flags(&unshare_flags); /* Return -EINVAL for all unsupported flags */ err = -EINVAL; if (unshare_flags & ~(CLONE_THREAD|CLONE_FS|CLONE_NEWNS|CLONE_SIGHAND| - CLONE_VM|CLONE_FILES|CLONE_SYSVSEM|CLONE_NEWUTS)) + CLONE_VM|CLONE_FILES|CLONE_SYSVSEM| + CLONE_NEWUTS|CLONE_NEWIPC)) goto bad_unshare_out; if ((err = unshare_thread(unshare_flags))) @@ -1633,18 +1635,20 @@ asmlinkage long sys_unshare(unsigned long unshare_flags) goto bad_unshare_cleanup_fd; if ((err = unshare_utsname(unshare_flags, &new_uts))) goto bad_unshare_cleanup_semundo; + if ((err = unshare_ipcs(unshare_flags, &new_ipc))) + goto bad_unshare_cleanup_uts; - if (new_ns || new_uts) { + if (new_ns || new_uts || new_ipc) { old_nsproxy = current->nsproxy; new_nsproxy = dup_namespaces(old_nsproxy); if (!new_nsproxy) { err = -ENOMEM; - goto bad_unshare_cleanup_uts; + goto bad_unshare_cleanup_ipc; } } if (new_fs || new_ns || new_sigh || new_mm || new_fd || new_ulist || - new_uts) { + new_uts || new_ipc) { task_lock(current); @@ -1692,12 +1696,22 @@ asmlinkage long sys_unshare(unsigned long unshare_flags) new_uts = uts; } + if (new_ipc) { + ipc = current->nsproxy->ipc_ns; + current->nsproxy->ipc_ns = new_ipc; + new_ipc = ipc; + } + task_unlock(current); } if (new_nsproxy) put_nsproxy(new_nsproxy); +bad_unshare_cleanup_ipc: + if (new_ipc) + put_ipc_ns(new_ipc); + bad_unshare_cleanup_uts: if (new_uts) put_uts_ns(new_uts); diff --git a/kernel/nsproxy.c b/kernel/nsproxy.c index 8246813335c..8d6c852dc51 100644 --- a/kernel/nsproxy.c +++ b/kernel/nsproxy.c @@ -7,6 +7,10 @@ * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation, version 2 of the * License. + * + * Jun 2006 - namespaces support + * OpenVZ, SWsoft Inc. + * Pavel Emelianov <xemul@openvz.org> */ #include <linux/module.h> @@ -62,6 +66,8 @@ struct nsproxy *dup_namespaces(struct nsproxy *orig) get_namespace(ns->namespace); if (ns->uts_ns) get_uts_ns(ns->uts_ns); + if (ns->ipc_ns) + get_ipc_ns(ns->ipc_ns); } return ns; @@ -82,7 +88,7 @@ int copy_namespaces(int flags, struct task_struct *tsk) get_nsproxy(old_ns); - if (!(flags & (CLONE_NEWNS | CLONE_NEWUTS))) + if (!(flags & (CLONE_NEWNS | CLONE_NEWUTS | CLONE_NEWIPC))) return 0; new_ns = clone_namespaces(old_ns); @@ -94,24 +100,31 @@ int copy_namespaces(int flags, struct task_struct *tsk) tsk->nsproxy = new_ns; err = copy_namespace(flags, tsk); - if (err) { - tsk->nsproxy = old_ns; - put_nsproxy(new_ns); - goto out; - } + if (err) + goto out_ns; err = copy_utsname(flags, tsk); - if (err) { - if (new_ns->namespace) - put_namespace(new_ns->namespace); - tsk->nsproxy = old_ns; - put_nsproxy(new_ns); - goto out; - } + if (err) + goto out_uts; + + err = copy_ipcs(flags, tsk); + if (err) + goto out_ipc; out: put_nsproxy(old_ns); return err; + +out_ipc: + if (new_ns->uts_ns) + put_uts_ns(new_ns->uts_ns); +out_uts: + if (new_ns->namespace) + put_namespace(new_ns->namespace); +out_ns: + tsk->nsproxy = old_ns; + put_nsproxy(new_ns); + goto out; } void free_nsproxy(struct nsproxy *ns) @@ -120,5 +133,7 @@ void free_nsproxy(struct nsproxy *ns) put_namespace(ns->namespace); if (ns->uts_ns) put_uts_ns(ns->uts_ns); + if (ns->ipc_ns) + put_ipc_ns(ns->ipc_ns); kfree(ns); } |