diff options
Diffstat (limited to 'fs/jffs2/nodelist.c')
| -rw-r--r-- | fs/jffs2/nodelist.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/fs/jffs2/nodelist.c b/fs/jffs2/nodelist.c index 7997f526c94b..0cf5e6f11989 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 1.102 2005/07/28 12:45:10 dedekind Exp $ + * $Id: nodelist.c,v 1.103 2005/07/31 08:20:44 dedekind Exp $ * */ @@ -51,6 +51,30 @@ void jffs2_add_fd_to_list(struct jffs2_sb_info *c, struct jffs2_full_dirent *new *prev = new; } +void jffs2_truncate_fragtree(struct jffs2_sb_info *c, struct rb_root *list, uint32_t size) +{ + struct jffs2_node_frag *frag = jffs2_lookup_node_frag(list, size); + + JFFS2_DBG_FRAGTREE("truncating fragtree to 0x%08x bytes\n", size); + + /* We know frag->ofs <= size. That's what lookup does for us */ + if (frag && frag->ofs != size) { + if (frag->ofs+frag->size >= size) { + JFFS2_DBG_FRAGTREE2("truncating frag 0x%08x-0x%08x\n", frag->ofs, frag->ofs+frag->size); + frag->size = size - frag->ofs; + } + frag = frag_next(frag); + } + while (frag && frag->ofs >= size) { + struct jffs2_node_frag *next = frag_next(frag); + + JFFS2_DBG_FRAGTREE("removing frag 0x%08x-0x%08x\n", frag->ofs, frag->ofs+frag->size); + frag_erase(frag, list); + jffs2_obsolete_node_frag(c, frag); + frag = next; + } +} + void jffs2_obsolete_node_frag(struct jffs2_sb_info *c, struct jffs2_node_frag *this) { if (this->node) { |