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authorAl Viro <viro@zeniv.linux.org.uk>2011-11-24 19:59:16 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2012-01-03 22:57:00 -0500
commit0fb54e50562d8d6f4b1a4517ba9783a9c7c5c2b7 (patch)
tree5cb0c780208f837b004b7cc0be18e6dff3839246 /fs/namespace.c
parent4b8b21f4fe16ee15eec5c69ea5fb41b30e428e59 (diff)
vfs: spread struct mount - attach_recursive_mnt
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/namespace.c')
-rw-r--r--fs/namespace.c25
1 files changed, 14 insertions, 11 deletions
diff --git a/fs/namespace.c b/fs/namespace.c
index 60d5c15c087..64ae40c9107 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1587,7 +1587,7 @@ static int invent_group_ids(struct mount *mnt, bool recurse)
* Must be called without spinlocks held, since this function can sleep
* in allocations.
*/
-static int attach_recursive_mnt(struct vfsmount *source_mnt,
+static int attach_recursive_mnt(struct mount *source_mnt,
struct path *path, struct path *parent_path)
{
LIST_HEAD(tree_list);
@@ -1597,27 +1597,27 @@ static int attach_recursive_mnt(struct vfsmount *source_mnt,
int err;
if (IS_MNT_SHARED(dest_mnt)) {
- err = invent_group_ids(real_mount(source_mnt), true);
+ err = invent_group_ids(source_mnt, true);
if (err)
goto out;
}
- err = propagate_mnt(dest_mnt, dest_dentry, source_mnt, &tree_list);
+ err = propagate_mnt(dest_mnt, dest_dentry, &source_mnt->mnt, &tree_list);
if (err)
goto out_cleanup_ids;
br_write_lock(vfsmount_lock);
if (IS_MNT_SHARED(dest_mnt)) {
- for (p = real_mount(source_mnt); p; p = next_mnt(p, source_mnt))
+ for (p = source_mnt; p; p = next_mnt(p, &source_mnt->mnt))
set_mnt_shared(&p->mnt);
}
if (parent_path) {
- detach_mnt(real_mount(source_mnt), parent_path);
- attach_mnt(real_mount(source_mnt), path);
+ detach_mnt(source_mnt, parent_path);
+ attach_mnt(source_mnt, path);
touch_mnt_namespace(parent_path->mnt->mnt_ns);
} else {
- mnt_set_mountpoint(dest_mnt, dest_dentry, source_mnt);
- commit_tree(real_mount(source_mnt));
+ mnt_set_mountpoint(dest_mnt, dest_dentry, &source_mnt->mnt);
+ commit_tree(source_mnt);
}
list_for_each_entry_safe(child, p, &tree_list, mnt.mnt_hash) {
@@ -1630,7 +1630,7 @@ static int attach_recursive_mnt(struct vfsmount *source_mnt,
out_cleanup_ids:
if (IS_MNT_SHARED(dest_mnt))
- cleanup_group_ids(real_mount(source_mnt), NULL);
+ cleanup_group_ids(source_mnt, NULL);
out:
return err;
}
@@ -1674,7 +1674,7 @@ static int graft_tree(struct vfsmount *mnt, struct path *path)
if (d_unlinked(path->dentry))
return -ENOENT;
- return attach_recursive_mnt(mnt, path, NULL);
+ return attach_recursive_mnt(real_mount(mnt), path, NULL);
}
/*
@@ -1859,6 +1859,7 @@ static int do_move_mount(struct path *path, char *old_name)
{
struct path old_path, parent_path;
struct vfsmount *p;
+ struct mount *old;
int err = 0;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
@@ -1883,6 +1884,8 @@ static int do_move_mount(struct path *path, char *old_name)
if (old_path.dentry != old_path.mnt->mnt_root)
goto out1;
+ old = real_mount(old_path.mnt);
+
if (!mnt_has_parent(old_path.mnt))
goto out1;
@@ -1906,7 +1909,7 @@ static int do_move_mount(struct path *path, char *old_name)
if (p == old_path.mnt)
goto out1;
- err = attach_recursive_mnt(old_path.mnt, path, &parent_path);
+ err = attach_recursive_mnt(old, path, &parent_path);
if (err)
goto out1;