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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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7
fs/proc/namespaces.c
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@ -45,7 +45,7 @@ static const struct inode_operations ns_inode_operations = {
static char *ns_dname(struct dentry *dentry, char *buffer, int buflen)
{
struct inode *inode = dentry->d_inode;
const struct proc_ns_operations *ns_ops = PROC_I(inode)->ns.ns_ops;
const struct proc_ns_operations *ns_ops = dentry->d_fsdata;
return dynamic_dname(dentry, buffer, buflen, "%s:[%lu]",
ns_ops->name, inode->i_ino);
@ -75,6 +75,7 @@ static struct dentry *proc_ns_get_dentry(struct super_block *sb,
ns_ops->put(ns);
return ERR_PTR(-ENOMEM);
}
dentry->d_fsdata = (void *)ns_ops;
inode = iget_locked(sb, ns->inum);
if (!inode) {
@ -286,9 +287,9 @@ out_invalid:
return ERR_PTR(-EINVAL);
}
struct proc_ns *get_proc_ns(struct inode *inode)
struct ns_common *get_proc_ns(struct inode *inode)
{
return &PROC_I(inode)->ns;
return PROC_I(inode)->ns.ns;
}
bool proc_ns_inode(struct inode *inode)