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/fs/exec.c b/fs/exec.c
index 9ff6069..7a12d2d 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -112,7 +112,7 @@
goto out;
error = -EINVAL;
- if (!S_ISREG(nd.dentry->d_inode->i_mode))
+ if (!S_ISREG(nd.path.dentry->d_inode->i_mode))
goto exit;
error = vfs_permission(&nd, MAY_READ | MAY_EXEC);
@@ -652,7 +652,7 @@
file = ERR_PTR(err);
if (!err) {
- struct inode *inode = nd.dentry->d_inode;
+ struct inode *inode = nd.path.dentry->d_inode;
file = ERR_PTR(-EACCES);
if (S_ISREG(inode->i_mode)) {
int err = vfs_permission(&nd, MAY_EXEC);
