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bury struct proc_ns in fs/proc

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a) make get_proc_ns() return a pointer to struct ns_common
b) mirror ns_ops in dentry->d_fsdata of ns dentries, so that
is_mnt_ns_file() could get away with fewer dereferences.

That way struct proc_ns becomes invisible outside of fs/proc/*.c

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2014-11-01 03:13:17 -04:00
parent 33c429405a
commit f77c80142e
6 changed files with 15 additions and 27 deletions
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4
kernel/nsproxy.c
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@ -222,7 +222,6 @@ SYSCALL_DEFINE2(setns, int, fd, int, nstype)
{
struct task_struct *tsk = current;
struct nsproxy *new_nsproxy;
struct proc_ns *ei;
struct file *file;
struct ns_common *ns;
int err;
@ -232,8 +231,7 @@ SYSCALL_DEFINE2(setns, int, fd, int, nstype)
return PTR_ERR(file);
err = -EINVAL;
ei = get_proc_ns(file_inode(file));
ns = ei->ns;
ns = get_proc_ns(file_inode(file));
if (nstype && (ns->ops->type != nstype))
goto out;