Subject: [PATCH] Modify proc to slict the process tree at the current pspace at mount time.
From: Eric W. Biederman <ebiederman@lnxi.com>
Date: 1130619651 -0600

---

 fs/proc/inode.c |    3 ++-
 fs/proc/root.c  |   16 +++++++++++++++-
 2 files changed, 17 insertions(+), 2 deletions(-)

7bf711c47af96e50c22c6a1ab8caeb108ff9a373
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index 70527e0..2fb25f7 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -191,6 +191,7 @@ out_fail:
 int proc_fill_super(struct super_block *s, void *data, int silent)
 {
 	struct inode * root_inode;
+	struct pspace *pspace = data;
 
 	s->s_flags |= MS_NODIRATIME;
 	s->s_blocksize = 1024;
@@ -199,7 +200,7 @@ int proc_fill_super(struct super_block *
 	s->s_op = &proc_sops;
 	s->s_time_gran = 1;
 	
-	root_inode = proc_pspace_make_inode(s, &init_pspace);
+	root_inode = proc_pspace_make_inode(s, pspace);
 	if (!root_inode)
 		goto out_no_root;
 	s->s_root = d_alloc_root(root_inode);
diff --git a/fs/proc/root.c b/fs/proc/root.c
index e7f765a..a8be1e6 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -28,10 +28,24 @@ struct proc_dir_entry *proc_net, *proc_n
 struct proc_dir_entry *proc_sys_root;
 #endif
 
+static int proc_test_sb(struct super_block *s, void *data)
+{
+	struct dentry *dentry = s->s_root;
+	struct inode *inode = dentry->d_inode;
+	struct task_struct *task = PROC_I(inode)->task;
+
+	return task->pspace == data;
+}
+
+static int proc_set_sb(struct super_block *s, void *data)
+{
+	return proc_fill_super(s, data, 0);
+}
+
 static struct super_block *proc_get_sb(struct file_system_type *fs_type,
 	int flags, const char *dev_name, void *data)
 {
-	return get_sb_single(fs_type, flags, data, proc_fill_super);
+	return sget(fs_type, proc_test_sb, proc_set_sb, current->pspace);
 }
 
 static struct file_system_type proc_fs_type = {
-- 
1.0.GIT