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vfs: spread struct mount - remaining argument of next_mnt()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2011-11-25 03:06:56 -05:00
parent c63181e6b6
commit 909b0a88ef
1 changed files with 18 additions and 17 deletions
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35
fs/namespace.c
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@ -631,12 +631,12 @@ static void commit_tree(struct mount *mnt)
touch_mnt_namespace(n);
}
static struct mount *next_mnt(struct mount *p, struct vfsmount *root)
static struct mount *next_mnt(struct mount *p, struct mount *root)
{
struct list_head *next = p->mnt_mounts.next;
if (next == &p->mnt_mounts) {
while (1) {
if (&p->mnt == root)
if (p == root)
return NULL;
next = p->mnt_child.next;
if (next != &p->mnt_parent->mnt_mounts)
@ -1145,16 +1145,17 @@ const struct seq_operations mountstats_op = {
* open files, pwds, chroots or sub mounts that are
* busy.
*/
int may_umount_tree(struct vfsmount *mnt)
int may_umount_tree(struct vfsmount *m)
{
struct mount *mnt = real_mount(m);
int actual_refs = 0;
int minimum_refs = 0;
struct mount *p;
BUG_ON(!mnt);
BUG_ON(!m);
/* write lock needed for mnt_get_count */
br_write_lock(vfsmount_lock);
for (p = real_mount(mnt); p; p = next_mnt(p, mnt)) {
for (p = mnt; p; p = next_mnt(p, mnt)) {
actual_refs += mnt_get_count(p);
minimum_refs += 2;
}
@ -1228,7 +1229,7 @@ void umount_tree(struct mount *mnt, int propagate, struct list_head *kill)
LIST_HEAD(tmp_list);
struct mount *p;
for (p = mnt; p; p = next_mnt(p, &mnt->mnt))
for (p = mnt; p; p = next_mnt(p, mnt))
list_move(&p->mnt_hash, &tmp_list);
if (propagate)
@ -1436,7 +1437,7 @@ struct mount *copy_tree(struct mount *mnt, struct dentry *dentry,
if (!is_subdir(r->mnt_mountpoint, dentry))
continue;
for (s = r; s; s = next_mnt(s, &r->mnt)) {
for (s = r; s; s = next_mnt(s, r)) {
if (!(flag & CL_COPY_ALL) && IS_MNT_UNBINDABLE(s)) {
s = skip_mnt_tree(s);
continue;
@ -1509,7 +1510,7 @@ static void cleanup_group_ids(struct mount *mnt, struct mount *end)
{
struct mount *p;
for (p = mnt; p != end; p = next_mnt(p, &mnt->mnt)) {
for (p = mnt; p != end; p = next_mnt(p, mnt)) {
if (p->mnt_group_id && !IS_MNT_SHARED(p))
mnt_release_group_id(p);
}
@ -1519,7 +1520,7 @@ static int invent_group_ids(struct mount *mnt, bool recurse)
{
struct mount *p;
for (p = mnt; p; p = recurse ? next_mnt(p, &mnt->mnt) : NULL) {
for (p = mnt; p; p = recurse ? next_mnt(p, mnt) : NULL) {
if (!p->mnt_group_id && !IS_MNT_SHARED(p)) {
int err = mnt_alloc_group_id(p);
if (err) {
@ -1616,7 +1617,7 @@ static int attach_recursive_mnt(struct mount *source_mnt,
br_write_lock(vfsmount_lock);
if (IS_MNT_SHARED(dest_mnt)) {
for (p = source_mnt; p; p = next_mnt(p, &source_mnt->mnt))
for (p = source_mnt; p; p = next_mnt(p, source_mnt))
set_mnt_shared(p);
}
if (parent_path) {
@ -1731,7 +1732,7 @@ static int do_change_type(struct path *path, int flag)
}
br_write_lock(vfsmount_lock);
for (m = mnt; m; m = (recurse ? next_mnt(m, &mnt->mnt) : NULL))
for (m = mnt; m; m = (recurse ? next_mnt(m, mnt) : NULL))
change_mnt_propagation(m, type);
br_write_unlock(vfsmount_lock);
@ -1859,7 +1860,7 @@ static int do_remount(struct path *path, int flags, int mnt_flags,
static inline int tree_contains_unbindable(struct mount *mnt)
{
struct mount *p;
for (p = mnt; p; p = next_mnt(p, &mnt->mnt)) {
for (p = mnt; p; p = next_mnt(p, mnt)) {
if (IS_MNT_UNBINDABLE(p))
return 1;
}
@ -2399,6 +2400,7 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns,
struct mnt_namespace *new_ns;
struct vfsmount *rootmnt = NULL, *pwdmnt = NULL;
struct mount *p, *q;
struct mount *old = real_mount(mnt_ns->root);
struct mount *new;
new_ns = alloc_mnt_ns();
@ -2407,8 +2409,7 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns,
down_write(&namespace_sem);
/* First pass: copy the tree topology */
new = copy_tree(real_mount(mnt_ns->root), mnt_ns->root->mnt_root,
CL_COPY_ALL | CL_EXPIRE);
new = copy_tree(old, old->mnt.mnt_root, CL_COPY_ALL | CL_EXPIRE);
if (!new) {
up_write(&namespace_sem);
kfree(new_ns);
@ -2424,7 +2425,7 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns,
* as belonging to new namespace. We have already acquired a private
* fs_struct, so tsk->fs->lock is not needed.
*/
p = real_mount(mnt_ns->root);
p = old;
q = new;
while (p) {
q->mnt_ns = new_ns;
@ -2443,8 +2444,8 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns,
pwdmnt = &p->mnt;
}
}
p = next_mnt(p, mnt_ns->root);
q = next_mnt(q, new_ns->root);
p = next_mnt(p, old);
q = next_mnt(q, new);
}
up_write(&namespace_sem);