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SubjectRe: [2.4.19] How to get the path name of a struct dentry
Date
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On Wednesday 12 March 2003 14:04, Torsten Foertsch wrote:
> On Wednesday 12 March 2003 11:47, Christoph Hellwig wrote:
> > On Wed, Mar 12, 2003 at 11:38:27AM +0100, Torsten Foertsch wrote:
> > > Next question, is there a way to get the dentry and vfsmount of /? I
> > > mean not current->fs->root and current->fs->rootmnt. They can be
> > > chrooted. I mean the real /.
> >
> > No. Esecially as there is not single "real" root.
>
> How about that slightly modified d_path()?
>
> char*
> full_d_path( struct dentry *dentry,
> struct vfsmount *vfsmnt,
> char *buf, int buflen ) {
...
> }

or even simpler

char*
full_d_path( struct dentry *dentry,
struct vfsmount *vfsmnt,
char *buf, int buflen ) {
char *res;
struct vfsmount *rootmnt;
struct dentry *root;
struct namespace *ns;

ns=current->namespace;
/* get_namespace( ns ); */
rootmnt=mntget( ns->root );
/* put_namespace( ns ); */

root = dget(rootmnt->mnt_root);

spin_lock(&dcache_lock);
res = __d_path(dentry, vfsmnt, root, rootmnt, buf, buflen);
spin_unlock(&dcache_lock);

dput(root);
mntput(rootmnt);
return res;
}

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