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Embed a struct path into struct nameidata instead of nd->{dentry,mnt}

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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.

[[email protected]: coding-style fixes]
[[email protected]: fix cifs]
[[email protected]: fix smack]
Signed-off-by: Jan Blunck <[email protected]>
Signed-off-by: Andreas Gruenbacher <[email protected]>
Acked-by: Christoph Hellwig <[email protected]>
Cc: Al Viro <[email protected]>
Cc: Casey Schaufler <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Jan Blunck 2008-02-14 19:34:32 -08:00 • committed by Linus Torvalds
commit 4ac9137858
47 changed files with 431 additions and 402 deletions
Download patch file Download diff file Expand all files Collapse all files

4
fs/compat.c
View file

@ -241,7 +241,7 @@ asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs
error = user_path_walk(path, &nd);
if (!error) {
struct kstatfs tmp;
error = vfs_statfs(nd.dentry, &tmp);
error = vfs_statfs(nd.path.dentry, &tmp);
if (!error)
error = put_compat_statfs(buf, &tmp);
path_release(&nd);
@ -309,7 +309,7 @@ asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, s
error = user_path_walk(path, &nd);
if (!error) {
struct kstatfs tmp;
error = vfs_statfs(nd.dentry, &tmp);
error = vfs_statfs(nd.path.dentry, &tmp);
if (!error)
error = put_compat_statfs64(buf, &tmp);
path_release(&nd);