Embed a struct path into struct nameidata instead of nd->{dentry,mnt}
This is the central patch of a cleanup series. In most cases there is no good
reason why someone would want to use a dentry for itself. This series reflects
that fact and embeds a struct path into nameidata.
Together with the other patches of this series
- it enforced the correct order of getting/releasing the reference count on
<dentry,vfsmount> pairs
- it prepares the VFS for stacking support since it is essential to have a
struct path in every place where the stack can be traversed
- it reduces the overall code size:
without patch series:
text data bss dec hex filename
5321639 858418 715768 6895825 6938d1 vmlinux
with patch series:
text data bss dec hex filename
5320026 858418 715768 6894212 693284 vmlinux
This patch:
Switch from nd->{dentry,mnt} to nd->path.{dentry,mnt} everywhere.
[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: fix cifs]
[akpm@linux-foundation.org: fix smack]
Signed-off-by: Jan Blunck <jblunck@suse.de>
Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Acked-by: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/kernel/audit_tree.c b/kernel/audit_tree.c
index f4fcf58..b898814 100644
--- a/kernel/audit_tree.c
+++ b/kernel/audit_tree.c
@@ -549,7 +549,7 @@
if (err)
goto skip_it;
- root_mnt = collect_mounts(nd.mnt, nd.dentry);
+ root_mnt = collect_mounts(nd.path.mnt, nd.path.dentry);
path_release(&nd);
if (!root_mnt)
goto skip_it;
@@ -583,17 +583,17 @@
static int is_under(struct vfsmount *mnt, struct dentry *dentry,
struct nameidata *nd)
{
- if (mnt != nd->mnt) {
+ if (mnt != nd->path.mnt) {
for (;;) {
if (mnt->mnt_parent == mnt)
return 0;
- if (mnt->mnt_parent == nd->mnt)
+ if (mnt->mnt_parent == nd->path.mnt)
break;
mnt = mnt->mnt_parent;
}
dentry = mnt->mnt_mountpoint;
}
- return is_subdir(dentry, nd->dentry);
+ return is_subdir(dentry, nd->path.dentry);
}
int audit_make_tree(struct audit_krule *rule, char *pathname, u32 op)
@@ -641,7 +641,7 @@
err = path_lookup(tree->pathname, 0, &nd);
if (err)
goto Err;
- mnt = collect_mounts(nd.mnt, nd.dentry);
+ mnt = collect_mounts(nd.path.mnt, nd.path.dentry);
path_release(&nd);
if (!mnt) {
err = -ENOMEM;
@@ -701,7 +701,7 @@
err = path_lookup(new, 0, &nd);
if (err)
return err;
- tagged = collect_mounts(nd.mnt, nd.dentry);
+ tagged = collect_mounts(nd.path.mnt, nd.path.dentry);
path_release(&nd);
if (!tagged)
return -ENOMEM;
@@ -711,8 +711,8 @@
drop_collected_mounts(tagged);
return err;
}
- mnt = mntget(nd.mnt);
- dentry = dget(nd.dentry);
+ mnt = mntget(nd.path.mnt);
+ dentry = dget(nd.path.dentry);
path_release(&nd);
if (dentry == tagged->mnt_root && dentry == mnt->mnt_root)