ofs += 4;
continue;
}
+ /* Due to poor choice of crc32 seed, an all-zero node will have a correct CRC */
+ if (!je32_to_cpu(node->hdr_crc) && !je16_to_cpu(node->nodetype) &&
+ !je16_to_cpu(node->magic) && !je32_to_cpu(node->totlen)) {
+ noisy_printk(&noise, "jffs2_scan_eraseblock(): All zero node header at 0x%08x.\n", ofs);
+ if ((err = jffs2_scan_dirty_space(c, jeb, 4)))
+ return err;
+ ofs += 4;
+ continue;
+ }
if (ofs + je32_to_cpu(node->totlen) >
jeb->offset + c->sector_size) {
struct jffs2_raw_inode *ri, uint32_t ofs, struct jffs2_summary *s)
{
struct jffs2_inode_cache *ic;
- uint32_t ino = je32_to_cpu(ri->ino);
- int err;
+ uint32_t crc, ino = je32_to_cpu(ri->ino);
D1(printk(KERN_DEBUG "jffs2_scan_inode_node(): Node at 0x%08x\n", ofs));
Which means that the _full_ amount of time to get to proper write mode with GC
operational may actually be _longer_ than before. Sucks to be me. */
+ /* Check the node CRC in any case. */
+ crc = crc32(0, ri, sizeof(*ri)-8);
+ if (crc != je32_to_cpu(ri->node_crc)) {
+ printk(KERN_NOTICE "jffs2_scan_inode_node(): CRC failed on "
+ "node at 0x%08x: Read 0x%08x, calculated 0x%08x\n",
+ ofs, je32_to_cpu(ri->node_crc), crc);
+ /*
+ * We believe totlen because the CRC on the node
+ * _header_ was OK, just the node itself failed.
+ */
+ return jffs2_scan_dirty_space(c, jeb,
+ PAD(je32_to_cpu(ri->totlen)));
+ }
+
ic = jffs2_get_ino_cache(c, ino);
if (!ic) {
- /* Inocache get failed. Either we read a bogus ino# or it's just genuinely the
- first node we found for this inode. Do a CRC check to protect against the former
- case */
- uint32_t crc = crc32(0, ri, sizeof(*ri)-8);
-
- if (crc != je32_to_cpu(ri->node_crc)) {
- printk(KERN_NOTICE "jffs2_scan_inode_node(): CRC failed on node at 0x%08x: Read 0x%08x, calculated 0x%08x\n",
- ofs, je32_to_cpu(ri->node_crc), crc);
- /* We believe totlen because the CRC on the node _header_ was OK, just the node itself failed. */
- if ((err = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(ri->totlen)))))
- return err;
- return 0;
- }
ic = jffs2_scan_make_ino_cache(c, ino);
if (!ic)
return -ENOMEM;