d_path: Make get_dcookie() use a struct path argument

[linux-2.6] / fs / namei.c

diff --git a/fs/namei.c b/fs/namei.c
index a6575ca9f9d77eb49e2d14fbe27068cd1a6e70f0..941c8e8228c041d90652313f13e72f2b6e975716 100644 (file)
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -549,16 +549,16 @@ walk_init_root(const char *name, struct nameidata *nd)
        struct fs_struct *fs = current->fs;
 
        read_lock(&fs->lock);
-       if (fs->altroot && !(nd->flags & LOOKUP_NOALT)) {
-               nd->path.mnt = mntget(fs->altrootmnt);
-               nd->path.dentry = dget(fs->altroot);
+       if (fs->altroot.dentry && !(nd->flags & LOOKUP_NOALT)) {
+               nd->path = fs->altroot;
+               path_get(&fs->altroot);
                read_unlock(&fs->lock);
                if (__emul_lookup_dentry(name,nd))
                        return 0;
                read_lock(&fs->lock);
        }
-       nd->path.mnt = mntget(fs->rootmnt);
-       nd->path.dentry = dget(fs->root);
+       nd->path = fs->root;
+       path_get(&fs->root);
        read_unlock(&fs->lock);
        return 1;
 }
@@ -755,8 +755,8 @@ static __always_inline void follow_dotdot(struct nameidata *nd)
                struct dentry *old = nd->path.dentry;
 
                 read_lock(&fs->lock);
-               if (nd->path.dentry == fs->root &&
-                   nd->path.mnt == fs->rootmnt) {
+               if (nd->path.dentry == fs->root.dentry &&
+                   nd->path.mnt == fs->root.mnt) {
                         read_unlock(&fs->lock);
                        break;
                }
@@ -1078,8 +1078,8 @@ static int __emul_lookup_dentry(const char *name, struct nameidata *nd)
                 */
                nd->last_type = LAST_ROOT;
                read_lock(&fs->lock);
-               nd->path.mnt = mntget(fs->rootmnt);
-               nd->path.dentry = dget(fs->root);
+               nd->path = fs->root;
+               path_get(&fs->root);
                read_unlock(&fs->lock);
                if (path_walk(name, nd) == 0) {
                        if (nd->path.dentry->d_inode) {
@@ -1099,29 +1099,22 @@ void set_fs_altroot(void)
 {
        char *emul = __emul_prefix();
        struct nameidata nd;
-       struct vfsmount *mnt = NULL, *oldmnt;
-       struct dentry *dentry = NULL, *olddentry;
+       struct path path = {}, old_path;
        int err;
        struct fs_struct *fs = current->fs;
 
        if (!emul)
                goto set_it;
        err = path_lookup(emul, LOOKUP_FOLLOW|LOOKUP_DIRECTORY|LOOKUP_NOALT, &nd);
-       if (!err) {
-               mnt = nd.path.mnt;
-               dentry = nd.path.dentry;
-       }
+       if (!err)
+               path = nd.path;
 set_it:
        write_lock(&fs->lock);
-       oldmnt = fs->altrootmnt;
-       olddentry = fs->altroot;
-       fs->altrootmnt = mnt;
-       fs->altroot = dentry;
+       old_path = fs->altroot;
+       fs->altroot = path;
        write_unlock(&fs->lock);
-       if (olddentry) {
-               dput(olddentry);
-               mntput(oldmnt);
-       }
+       if (old_path.dentry)
+               path_put(&old_path);
 }
 
 /* Returns 0 and nd will be valid on success; Retuns error, otherwise. */
@@ -1139,21 +1132,21 @@ static int do_path_lookup(int dfd, const char *name,
 
        if (*name=='/') {
                read_lock(&fs->lock);
-               if (fs->altroot && !(nd->flags & LOOKUP_NOALT)) {
-                       nd->path.mnt = mntget(fs->altrootmnt);
-                       nd->path.dentry = dget(fs->altroot);
+               if (fs->altroot.dentry && !(nd->flags & LOOKUP_NOALT)) {
+                       nd->path = fs->altroot;
+                       path_get(&fs->altroot);
                        read_unlock(&fs->lock);
                        if (__emul_lookup_dentry(name,nd))
                                goto out; /* found in altroot */
                        read_lock(&fs->lock);
                }
-               nd->path.mnt = mntget(fs->rootmnt);
-               nd->path.dentry = dget(fs->root);
+               nd->path = fs->root;
+               path_get(&fs->root);
                read_unlock(&fs->lock);
        } else if (dfd == AT_FDCWD) {
                read_lock(&fs->lock);
-               nd->path.mnt = mntget(fs->pwdmnt);
-               nd->path.dentry = dget(fs->pwd);
+               nd->path = fs->pwd;
+               path_get(&fs->pwd);
                read_unlock(&fs->lock);
        } else {
                struct dentry *dentry;