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vfs: move mnt_list to struct mount

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2011-11-25 02:19:55 -05:00
parent fc7be130c7
commit 1a4eeaf2a8
3 changed files with 26 additions and 25 deletions
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3
fs/mount.h
View file

@ -19,7 +19,8 @@ struct mount {
#endif
struct list_head mnt_mounts; /* list of children, anchored here */
struct list_head mnt_child; /* and going through their mnt_child */
/* yet to be moved - up to mnt_list */
/* yet to be moved - up to mnt_devname */
struct list_head mnt_list;
struct list_head mnt_expire; /* link in fs-specific expiry list */
struct list_head mnt_share; /* circular list of shared mounts */
struct list_head mnt_slave_list;/* list of slave mounts */

47
fs/namespace.c
View file

@ -202,7 +202,7 @@ static struct mount *alloc_vfsmnt(const char *name)
INIT_LIST_HEAD(&p->mnt_hash);
INIT_LIST_HEAD(&p->mnt_child);
INIT_LIST_HEAD(&p->mnt_mounts);
INIT_LIST_HEAD(&mnt->mnt_list);
INIT_LIST_HEAD(&p->mnt_list);
INIT_LIST_HEAD(&p->mnt_expire);
INIT_LIST_HEAD(&p->mnt_share);
INIT_LIST_HEAD(&p->mnt_slave_list);
@ -618,8 +618,8 @@ static void commit_tree(struct mount *mnt)
BUG_ON(parent == mnt);
list_add_tail(&head, &mnt->mnt.mnt_list);
list_for_each_entry(m, &head, mnt.mnt_list) {
list_add_tail(&head, &mnt->mnt_list);
list_for_each_entry(m, &head, mnt_list) {
m->mnt_ns = n;
__mnt_make_longterm(m);
}
@ -987,7 +987,8 @@ static void show_type(struct seq_file *m, struct super_block *sb)
static int show_vfsmnt(struct seq_file *m, void *v)
{
struct vfsmount *mnt = list_entry(v, struct vfsmount, mnt_list);
struct mount *r = list_entry(v, struct mount, mnt_list);
struct vfsmount *mnt = &r->mnt;
int err = 0;
struct path mnt_path = { .dentry = mnt->mnt_root, .mnt = mnt };
@ -1024,8 +1025,8 @@ const struct seq_operations mounts_op = {
static int show_mountinfo(struct seq_file *m, void *v)
{
struct proc_mounts *p = m->private;
struct vfsmount *mnt = list_entry(v, struct vfsmount, mnt_list);
struct mount *r = real_mount(mnt);
struct mount *r = list_entry(v, struct mount, mnt_list);
struct vfsmount *mnt = &r->mnt;
struct super_block *sb = mnt->mnt_sb;
struct path mnt_path = { .dentry = mnt->mnt_root, .mnt = mnt };
struct path root = p->root;
@ -1092,7 +1093,8 @@ const struct seq_operations mountinfo_op = {
static int show_vfsstat(struct seq_file *m, void *v)
{
struct vfsmount *mnt = list_entry(v, struct vfsmount, mnt_list);
struct mount *r = list_entry(v, struct mount, mnt_list);
struct vfsmount *mnt = &r->mnt;
struct path mnt_path = { .dentry = mnt->mnt_root, .mnt = mnt };
int err = 0;
@ -1235,7 +1237,7 @@ void umount_tree(struct mount *mnt, int propagate, struct list_head *kill)
list_for_each_entry(p, &tmp_list, mnt_hash) {
list_del_init(&p->mnt_expire);
list_del_init(&p->mnt.mnt_list);
list_del_init(&p->mnt_list);
__touch_mnt_namespace(p->mnt_ns);
p->mnt_ns = NULL;
__mnt_make_shortterm(p);
@ -1331,7 +1333,7 @@ static int do_umount(struct mount *mnt, int flags)
retval = -EBUSY;
if (flags & MNT_DETACH || !propagate_mount_busy(mnt, 2)) {
if (!list_empty(&mnt->mnt.mnt_list))
if (!list_empty(&mnt->mnt_list))
umount_tree(mnt, 1, &umount_list);
retval = 0;
}
@ -1451,7 +1453,7 @@ struct mount *copy_tree(struct mount *mnt, struct dentry *dentry,
if (!q)
goto Enomem;
br_write_lock(vfsmount_lock);
list_add_tail(&q->mnt.mnt_list, &res->mnt.mnt_list);
list_add_tail(&q->mnt_list, &res->mnt_list);
attach_mnt(q, &path);
br_write_unlock(vfsmount_lock);
}
@ -1492,12 +1494,12 @@ void drop_collected_mounts(struct vfsmount *mnt)
int iterate_mounts(int (*f)(struct vfsmount *, void *), void *arg,
struct vfsmount *root)
{
struct vfsmount *mnt;
struct mount *mnt;
int res = f(root, arg);
if (res)
return res;
list_for_each_entry(mnt, &root->mnt_list, mnt_list) {
res = f(mnt, arg);
list_for_each_entry(mnt, &real_mount(root)->mnt_list, mnt_list) {
res = f(&mnt->mnt, arg);
if (res)
return res;
}
@ -2415,7 +2417,7 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns,
}
new_ns->root = &new->mnt;
br_write_lock(vfsmount_lock);
list_add_tail(&new_ns->list, &new_ns->root->mnt_list);
list_add_tail(&new_ns->list, &new->mnt_list);
br_write_unlock(vfsmount_lock);
/*
@ -2476,18 +2478,17 @@ struct mnt_namespace *copy_mnt_ns(unsigned long flags, struct mnt_namespace *ns,
* create_mnt_ns - creates a private namespace and adds a root filesystem
* @mnt: pointer to the new root filesystem mountpoint
*/
static struct mnt_namespace *create_mnt_ns(struct vfsmount *mnt)
static struct mnt_namespace *create_mnt_ns(struct vfsmount *m)
{
struct mnt_namespace *new_ns;
new_ns = alloc_mnt_ns();
struct mnt_namespace *new_ns = alloc_mnt_ns();
if (!IS_ERR(new_ns)) {
real_mount(mnt)->mnt_ns = new_ns;
__mnt_make_longterm(real_mount(mnt));
new_ns->root = mnt;
list_add(&new_ns->list, &new_ns->root->mnt_list);
struct mount *mnt = real_mount(m);
mnt->mnt_ns = new_ns;
__mnt_make_longterm(mnt);
new_ns->root = m;
list_add(&new_ns->list, &mnt->mnt_list);
} else {
mntput(mnt);
mntput(m);
}
return new_ns;
}

1
include/linux/mount.h
View file

@ -57,7 +57,6 @@ struct vfsmount {
struct hlist_head mnt_fsnotify_marks;
#endif
const char *mnt_devname; /* Name of device e.g. /dev/dsk/hda1 */
struct list_head mnt_list;
};
struct file; /* forward dec */