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authorLinus Torvalds <torvalds@linux-foundation.org>2014-12-16 15:53:03 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-12-16 15:53:03 -0800
commit603ba7e41bf5d405aba22294af5d075d8898176d (patch)
treefb9cf0b7c4912b5105f7da5efdd204cd0e66c8db /ipc
parent31f48fc8f226f968d6e6b9b9718abe8e16c51fe8 (diff)
parent93fe74b2e2b5d266d630f0c3f8287efcbe6ecd10 (diff)
downloadkernel-603ba7e41bf5d405aba22294af5d075d8898176d.tar.gz
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs pile #2 from Al Viro: "Next pile (and there'll be one or two more). The large piece in this one is getting rid of /proc/*/ns/* weirdness; among other things, it allows to (finally) make nameidata completely opaque outside of fs/namei.c, making for easier further cleanups in there" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: coda_venus_readdir(): use file_inode() fs/namei.c: fold link_path_walk() call into path_init() path_init(): don't bother with LOOKUP_PARENT in argument fs/namei.c: new helper (path_cleanup()) path_init(): store the "base" pointer to file in nameidata itself make default ->i_fop have ->open() fail with ENXIO make nameidata completely opaque outside of fs/namei.c kill proc_ns completely take the targets of /proc/*/ns/* symlinks to separate fs bury struct proc_ns in fs/proc copy address of proc_ns_ops into ns_common new helpers: ns_alloc_inum/ns_free_inum make proc_ns_operations work with struct ns_common * instead of void * switch the rest of proc_ns_operations to working with &...->ns netns: switch ->get()/->put()/->install()/->inum() to working with &net->ns make mntns ->get()/->put()/->install()/->inum() work with &mnt_ns->ns common object embedded into various struct ....ns
Diffstat (limited to 'ipc')
-rw-r--r--ipc/msgutil.c5
-rw-r--r--ipc/namespace.c32
2 files changed, 19 insertions, 18 deletions
diff --git a/ipc/msgutil.c b/ipc/msgutil.c
index 7e7095974d54..2b491590ebab 100644
--- a/ipc/msgutil.c
+++ b/ipc/msgutil.c
@@ -31,7 +31,10 @@ DEFINE_SPINLOCK(mq_lock);
struct ipc_namespace init_ipc_ns = {
.count = ATOMIC_INIT(1),
.user_ns = &init_user_ns,
- .proc_inum = PROC_IPC_INIT_INO,
+ .ns.inum = PROC_IPC_INIT_INO,
+#ifdef CONFIG_IPC_NS
+ .ns.ops = &ipcns_operations,
+#endif
};
atomic_t nr_ipc_ns = ATOMIC_INIT(1);
diff --git a/ipc/namespace.c b/ipc/namespace.c
index 1a3ffd40356e..068caf18d565 100644
--- a/ipc/namespace.c
+++ b/ipc/namespace.c
@@ -26,16 +26,17 @@ static struct ipc_namespace *create_ipc_ns(struct user_namespace *user_ns,
if (ns == NULL)
return ERR_PTR(-ENOMEM);
- err = proc_alloc_inum(&ns->proc_inum);
+ err = ns_alloc_inum(&ns->ns);
if (err) {
kfree(ns);
return ERR_PTR(err);
}
+ ns->ns.ops = &ipcns_operations;
atomic_set(&ns->count, 1);
err = mq_init_ns(ns);
if (err) {
- proc_free_inum(ns->proc_inum);
+ ns_free_inum(&ns->ns);
kfree(ns);
return ERR_PTR(err);
}
@@ -97,7 +98,7 @@ static void free_ipc_ns(struct ipc_namespace *ns)
atomic_dec(&nr_ipc_ns);
put_user_ns(ns->user_ns);
- proc_free_inum(ns->proc_inum);
+ ns_free_inum(&ns->ns);
kfree(ns);
}
@@ -127,7 +128,12 @@ void put_ipc_ns(struct ipc_namespace *ns)
}
}
-static void *ipcns_get(struct task_struct *task)
+static inline struct ipc_namespace *to_ipc_ns(struct ns_common *ns)
+{
+ return container_of(ns, struct ipc_namespace, ns);
+}
+
+static struct ns_common *ipcns_get(struct task_struct *task)
{
struct ipc_namespace *ns = NULL;
struct nsproxy *nsproxy;
@@ -138,17 +144,17 @@ static void *ipcns_get(struct task_struct *task)
ns = get_ipc_ns(nsproxy->ipc_ns);
task_unlock(task);
- return ns;
+ return ns ? &ns->ns : NULL;
}
-static void ipcns_put(void *ns)
+static void ipcns_put(struct ns_common *ns)
{
- return put_ipc_ns(ns);
+ return put_ipc_ns(to_ipc_ns(ns));
}
-static int ipcns_install(struct nsproxy *nsproxy, void *new)
+static int ipcns_install(struct nsproxy *nsproxy, struct ns_common *new)
{
- struct ipc_namespace *ns = new;
+ struct ipc_namespace *ns = to_ipc_ns(new);
if (!ns_capable(ns->user_ns, CAP_SYS_ADMIN) ||
!ns_capable(current_user_ns(), CAP_SYS_ADMIN))
return -EPERM;
@@ -160,18 +166,10 @@ static int ipcns_install(struct nsproxy *nsproxy, void *new)
return 0;
}
-static unsigned int ipcns_inum(void *vp)
-{
- struct ipc_namespace *ns = vp;
-
- return ns->proc_inum;
-}
-
const struct proc_ns_operations ipcns_operations = {
.name = "ipc",
.type = CLONE_NEWIPC,
.get = ipcns_get,
.put = ipcns_put,
.install = ipcns_install,
- .inum = ipcns_inum,
};