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-rw-r--r--fs/jffs2/nodelist.c73
1 files changed, 54 insertions, 19 deletions
diff --git a/fs/jffs2/nodelist.c b/fs/jffs2/nodelist.c
index 8a8e4b86382..be38cc5c35c 100644
--- a/fs/jffs2/nodelist.c
+++ b/fs/jffs2/nodelist.c
@@ -7,7 +7,7 @@
*
* For licensing information, see the file 'LICENCE' in this directory.
*
- * $Id: nodelist.c,v 1.94 2005/04/13 13:22:35 dwmw2 Exp $
+ * $Id: nodelist.c,v 1.95 2005/07/05 21:03:07 dwmw2 Exp $
*
*/
@@ -58,27 +58,61 @@ void jffs2_add_fd_to_list(struct jffs2_sb_info *c, struct jffs2_full_dirent *new
/* Put a new tmp_dnode_info into the list, keeping the list in
order of increasing version
*/
-static void jffs2_add_tn_to_list(struct jffs2_tmp_dnode_info *tn, struct jffs2_tmp_dnode_info **list)
+
+static void jffs2_add_tn_to_list(struct jffs2_tmp_dnode_info *tn, struct rb_root *list)
{
- struct jffs2_tmp_dnode_info **prev = list;
-
- while ((*prev) && (*prev)->version < tn->version) {
- prev = &((*prev)->next);
- }
- tn->next = (*prev);
- *prev = tn;
+ struct rb_node **p = &list->rb_node;
+ struct rb_node * parent = NULL;
+ struct jffs2_tmp_dnode_info *this;
+
+ while (*p) {
+ parent = *p;
+ this = rb_entry(parent, struct jffs2_tmp_dnode_info, rb);
+
+ if (tn->version < this->version)
+ p = &(*p)->rb_left;
+ else if (tn->version > this->version)
+ p = &(*p)->rb_right;
+ else if (tn < this)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ }
+
+ rb_link_node(&tn->rb, parent, p);
+ rb_insert_color(&tn->rb, list);
}
-static void jffs2_free_tmp_dnode_info_list(struct jffs2_tmp_dnode_info *tn)
+static void jffs2_free_tmp_dnode_info_list(struct rb_root *list)
{
- struct jffs2_tmp_dnode_info *next;
+ struct rb_node *this;
+ struct jffs2_tmp_dnode_info *tn;
+
+ this = list->rb_node;
- while (tn) {
- next = tn;
- tn = tn->next;
- jffs2_free_full_dnode(next->fn);
- jffs2_free_tmp_dnode_info(next);
+ /* Now at bottom of tree */
+ while (this) {
+ if (this->rb_left)
+ this = this->rb_left;
+ else if (this->rb_right)
+ this = this->rb_right;
+ else {
+ tn = rb_entry(this, struct jffs2_tmp_dnode_info, rb);
+ jffs2_free_full_dnode(tn->fn);
+ jffs2_free_tmp_dnode_info(tn);
+
+ this = this->rb_parent;
+ if (!this)
+ break;
+
+ if (this->rb_left == &tn->rb)
+ this->rb_left = NULL;
+ else if (this->rb_right == &tn->rb)
+ this->rb_right = NULL;
+ else BUG();
+ }
}
+ list->rb_node = NULL;
}
static void jffs2_free_full_dirent_list(struct jffs2_full_dirent *fd)
@@ -108,12 +142,13 @@ static struct jffs2_raw_node_ref *jffs2_first_valid_node(struct jffs2_raw_node_r
with this ino, returning the former in order of version */
int jffs2_get_inode_nodes(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
- struct jffs2_tmp_dnode_info **tnp, struct jffs2_full_dirent **fdp,
+ struct rb_root *tnp, struct jffs2_full_dirent **fdp,
uint32_t *highest_version, uint32_t *latest_mctime,
uint32_t *mctime_ver)
{
struct jffs2_raw_node_ref *ref, *valid_ref;
- struct jffs2_tmp_dnode_info *tn, *ret_tn = NULL;
+ struct jffs2_tmp_dnode_info *tn;
+ struct rb_root ret_tn = RB_ROOT;
struct jffs2_full_dirent *fd, *ret_fd = NULL;
union jffs2_node_union node;
size_t retlen;
@@ -450,7 +485,7 @@ int jffs2_get_inode_nodes(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
return 0;
free_out:
- jffs2_free_tmp_dnode_info_list(ret_tn);
+ jffs2_free_tmp_dnode_info_list(&ret_tn);
jffs2_free_full_dirent_list(ret_fd);
return err;
}