#include <linux/module.h>
#include <linux/sysfs.h>
#include <linux/seq_file.h>
-#include <linux/namespace.h>
+#include <linux/mnt_namespace.h>
#include <linux/namei.h>
#include <linux/security.h>
#include <linux/mount.h>
struct vfsmount *alloc_vfsmnt(const char *name)
{
- struct vfsmount *mnt = kmem_cache_alloc(mnt_cache, GFP_KERNEL);
+ struct vfsmount *mnt = kmem_cache_zalloc(mnt_cache, GFP_KERNEL);
if (mnt) {
- memset(mnt, 0, sizeof(struct vfsmount));
atomic_set(&mnt->mnt_count, 1);
INIT_LIST_HEAD(&mnt->mnt_hash);
INIT_LIST_HEAD(&mnt->mnt_child);
static inline int check_mnt(struct vfsmount *mnt)
{
- return mnt->mnt_namespace == current->nsproxy->namespace;
+ return mnt->mnt_ns == current->nsproxy->mnt_ns;
}
-static void touch_namespace(struct namespace *ns)
+static void touch_mnt_namespace(struct mnt_namespace *ns)
{
if (ns) {
ns->event = ++event;
}
}
-static void __touch_namespace(struct namespace *ns)
+static void __touch_mnt_namespace(struct mnt_namespace *ns)
{
if (ns && ns->event != event) {
ns->event = event;
struct vfsmount *parent = mnt->mnt_parent;
struct vfsmount *m;
LIST_HEAD(head);
- struct namespace *n = parent->mnt_namespace;
+ struct mnt_namespace *n = parent->mnt_ns;
BUG_ON(parent == mnt);
list_add_tail(&head, &mnt->mnt_list);
list_for_each_entry(m, &head, mnt_list)
- m->mnt_namespace = n;
+ m->mnt_ns = n;
list_splice(&head, n->list.prev);
list_add_tail(&mnt->mnt_hash, mount_hashtable +
hash(parent, mnt->mnt_mountpoint));
list_add_tail(&mnt->mnt_child, &parent->mnt_mounts);
- touch_namespace(n);
+ touch_mnt_namespace(n);
}
static struct vfsmount *next_mnt(struct vfsmount *p, struct vfsmount *root)
/* iterator */
static void *m_start(struct seq_file *m, loff_t *pos)
{
- struct namespace *n = m->private;
+ struct mnt_namespace *n = m->private;
struct list_head *p;
loff_t l = *pos;
static void *m_next(struct seq_file *m, void *v, loff_t *pos)
{
- struct namespace *n = m->private;
+ struct mnt_namespace *n = m->private;
struct list_head *p = ((struct vfsmount *)v)->mnt_list.next;
(*pos)++;
return p == &n->list ? NULL : list_entry(p, struct vfsmount, mnt_list);
{ MNT_NOEXEC, ",noexec" },
{ MNT_NOATIME, ",noatime" },
{ MNT_NODIRATIME, ",nodiratime" },
+ { MNT_RELATIME, ",relatime" },
{ 0, NULL }
};
struct proc_fs_info *fs_infop;
list_for_each_entry(p, kill, mnt_hash) {
list_del_init(&p->mnt_expire);
list_del_init(&p->mnt_list);
- __touch_namespace(p->mnt_namespace);
- p->mnt_namespace = NULL;
+ __touch_mnt_namespace(p->mnt_ns);
+ p->mnt_ns = NULL;
list_del_init(&p->mnt_child);
if (p->mnt_parent != p)
p->mnt_mountpoint->d_mounted--;
if (parent_nd) {
detach_mnt(source_mnt, parent_nd);
attach_mnt(source_mnt, nd);
- touch_namespace(current->nsproxy->namespace);
+ touch_mnt_namespace(current->nsproxy->mnt_ns);
} else {
mnt_set_mountpoint(dest_mnt, dest_dentry, source_mnt);
commit_tree(source_mnt);
*/
if (!propagate_mount_busy(mnt, 2)) {
/* delete from the namespace */
- touch_namespace(mnt->mnt_namespace);
+ touch_mnt_namespace(mnt->mnt_ns);
list_del_init(&mnt->mnt_list);
- mnt->mnt_namespace = NULL;
+ mnt->mnt_ns = NULL;
umount_tree(mnt, 1, umounts);
spin_unlock(&vfsmount_lock);
} else {
*/
static void expire_mount_list(struct list_head *graveyard, struct list_head *mounts)
{
- struct namespace *namespace;
+ struct mnt_namespace *ns;
struct vfsmount *mnt;
while (!list_empty(graveyard)) {
/* don't do anything if the namespace is dead - all the
* vfsmounts from it are going away anyway */
- namespace = mnt->mnt_namespace;
- if (!namespace || !namespace->root)
+ ns = mnt->mnt_ns;
+ if (!ns || !ns->root)
continue;
- get_namespace(namespace);
+ get_mnt_ns(ns);
spin_unlock(&vfsmount_lock);
down_write(&namespace_sem);
up_write(&namespace_sem);
release_mounts(&umounts);
mntput(mnt);
- put_namespace(namespace);
+ put_mnt_ns(ns);
spin_lock(&vfsmount_lock);
}
}
mnt_flags |= MNT_NOATIME;
if (flags & MS_NODIRATIME)
mnt_flags |= MNT_NODIRATIME;
+ if (flags & MS_RELATIME)
+ mnt_flags |= MNT_RELATIME;
flags &= ~(MS_NOSUID | MS_NOEXEC | MS_NODEV | MS_ACTIVE |
- MS_NOATIME | MS_NODIRATIME);
+ MS_NOATIME | MS_NODIRATIME | MS_RELATIME);
/* ... and get the mountpoint */
retval = path_lookup(dir_name, LOOKUP_FOLLOW, &nd);
* Allocate a new namespace structure and populate it with contents
* copied from the namespace of the passed in task structure.
*/
-struct namespace *dup_namespace(struct task_struct *tsk, struct fs_struct *fs)
+struct mnt_namespace *dup_mnt_ns(struct task_struct *tsk,
+ struct fs_struct *fs)
{
- struct namespace *namespace = tsk->nsproxy->namespace;
- struct namespace *new_ns;
+ struct mnt_namespace *mnt_ns = tsk->nsproxy->mnt_ns;
+ struct mnt_namespace *new_ns;
struct vfsmount *rootmnt = NULL, *pwdmnt = NULL, *altrootmnt = NULL;
struct vfsmount *p, *q;
- new_ns = kmalloc(sizeof(struct namespace), GFP_KERNEL);
+ new_ns = kmalloc(sizeof(struct mnt_namespace), GFP_KERNEL);
if (!new_ns)
return NULL;
down_write(&namespace_sem);
/* First pass: copy the tree topology */
- new_ns->root = copy_tree(namespace->root, namespace->root->mnt_root,
+ new_ns->root = copy_tree(mnt_ns->root, mnt_ns->root->mnt_root,
CL_COPY_ALL | CL_EXPIRE);
if (!new_ns->root) {
up_write(&namespace_sem);
* as belonging to new namespace. We have already acquired a private
* fs_struct, so tsk->fs->lock is not needed.
*/
- p = namespace->root;
+ p = mnt_ns->root;
q = new_ns->root;
while (p) {
- q->mnt_namespace = new_ns;
+ q->mnt_ns = new_ns;
if (fs) {
if (p == fs->rootmnt) {
rootmnt = p;
fs->altrootmnt = mntget(q);
}
}
- p = next_mnt(p, namespace->root);
+ p = next_mnt(p, mnt_ns->root);
q = next_mnt(q, new_ns->root);
}
up_write(&namespace_sem);
return new_ns;
}
-int copy_namespace(int flags, struct task_struct *tsk)
+int copy_mnt_ns(int flags, struct task_struct *tsk)
{
- struct namespace *namespace = tsk->nsproxy->namespace;
- struct namespace *new_ns;
+ struct mnt_namespace *ns = tsk->nsproxy->mnt_ns;
+ struct mnt_namespace *new_ns;
int err = 0;
- if (!namespace)
+ if (!ns)
return 0;
- get_namespace(namespace);
+ get_mnt_ns(ns);
if (!(flags & CLONE_NEWNS))
return 0;
goto out;
}
- new_ns = dup_namespace(tsk, tsk->fs);
+ new_ns = dup_mnt_ns(tsk, tsk->fs);
if (!new_ns) {
err = -ENOMEM;
goto out;
}
- tsk->nsproxy->namespace = new_ns;
+ tsk->nsproxy->mnt_ns = new_ns;
out:
- put_namespace(namespace);
+ put_mnt_ns(ns);
return err;
}
detach_mnt(user_nd.mnt, &root_parent);
attach_mnt(user_nd.mnt, &old_nd); /* mount old root on put_old */
attach_mnt(new_nd.mnt, &root_parent); /* mount new_root on / */
- touch_namespace(current->nsproxy->namespace);
+ touch_mnt_namespace(current->nsproxy->mnt_ns);
spin_unlock(&vfsmount_lock);
chroot_fs_refs(&user_nd, &new_nd);
security_sb_post_pivotroot(&user_nd, &new_nd);
static void __init init_mount_tree(void)
{
struct vfsmount *mnt;
- struct namespace *namespace;
+ struct mnt_namespace *ns;
mnt = do_kern_mount("rootfs", 0, "rootfs", NULL);
if (IS_ERR(mnt))
panic("Can't create rootfs");
- namespace = kmalloc(sizeof(*namespace), GFP_KERNEL);
- if (!namespace)
+ ns = kmalloc(sizeof(*ns), GFP_KERNEL);
+ if (!ns)
panic("Can't allocate initial namespace");
- atomic_set(&namespace->count, 1);
- INIT_LIST_HEAD(&namespace->list);
- init_waitqueue_head(&namespace->poll);
- namespace->event = 0;
- list_add(&mnt->mnt_list, &namespace->list);
- namespace->root = mnt;
- mnt->mnt_namespace = namespace;
-
- init_task.nsproxy->namespace = namespace;
- get_namespace(namespace);
-
- set_fs_pwd(current->fs, namespace->root, namespace->root->mnt_root);
- set_fs_root(current->fs, namespace->root, namespace->root->mnt_root);
+ atomic_set(&ns->count, 1);
+ INIT_LIST_HEAD(&ns->list);
+ init_waitqueue_head(&ns->poll);
+ ns->event = 0;
+ list_add(&mnt->mnt_list, &ns->list);
+ ns->root = mnt;
+ mnt->mnt_ns = ns;
+
+ init_task.nsproxy->mnt_ns = ns;
+ get_mnt_ns(ns);
+
+ set_fs_pwd(current->fs, ns->root, ns->root->mnt_root);
+ set_fs_root(current->fs, ns->root, ns->root->mnt_root);
}
void __init mnt_init(unsigned long mempages)
init_mount_tree();
}
-void __put_namespace(struct namespace *namespace)
+void __put_mnt_ns(struct mnt_namespace *ns)
{
- struct vfsmount *root = namespace->root;
+ struct vfsmount *root = ns->root;
LIST_HEAD(umount_list);
- namespace->root = NULL;
+ ns->root = NULL;
spin_unlock(&vfsmount_lock);
down_write(&namespace_sem);
spin_lock(&vfsmount_lock);
spin_unlock(&vfsmount_lock);
up_write(&namespace_sem);
release_mounts(&umount_list);
- kfree(namespace);
+ kfree(ns);
}
projects / linux-drm-fsl-dcu.git / blobdiff