/**
* data_nodes_cmp - compare 2 data nodes.
* @priv: UBIFS file-system description object
* @a: first data node
* @a: second data node
*
* This function compares data nodes @a and @b. Returns %1 if @a has greater
* inode or block number, and %-1 otherwise.
*/
static int data_nodes_cmp(void *priv, struct list_head *a, struct list_head *b)
{
ino_t inuma, inumb;
struct ubifs_info *c = priv;
struct ubifs_scan_node *sa, *sb;
cond_resched();
if (a == b)
return 0;
sa = list_entry(a, struct ubifs_scan_node, list);
sb = list_entry(b, struct ubifs_scan_node, list);
ubifs_assert(key_type(c, &sa->key) == UBIFS_DATA_KEY);
ubifs_assert(key_type(c, &sb->key) == UBIFS_DATA_KEY);
ubifs_assert(sa->type == UBIFS_DATA_NODE);
ubifs_assert(sb->type == UBIFS_DATA_NODE);
inuma = key_inum(c, &sa->key);
inumb = key_inum(c, &sb->key);
if (inuma == inumb) {
unsigned int blka = key_block(c, &sa->key);
unsigned int blkb = key_block(c, &sb->key);
if (blka <= blkb)
return -1;
} else if (inuma <= inumb)
return -1;
return 1;
}
static void sprintf_key(const struct ubifs_info *c, const union ubifs_key *key,
char *buffer)
{
char *p = buffer;
int type = key_type(c, key);
if (c->key_fmt == UBIFS_SIMPLE_KEY_FMT) {
switch (type) {
case UBIFS_INO_KEY:
sprintf(p, "(%lu, %s)", (unsigned long)key_inum(c, key),
get_key_type(type));
break;
case UBIFS_DENT_KEY:
case UBIFS_XENT_KEY:
sprintf(p, "(%lu, %s, %#08x)",
(unsigned long)key_inum(c, key),
get_key_type(type), key_hash(c, key));
break;
case UBIFS_DATA_KEY:
sprintf(p, "(%lu, %s, %u)",
(unsigned long)key_inum(c, key),
get_key_type(type), key_block(c, key));
break;
case UBIFS_TRUN_KEY:
sprintf(p, "(%lu, %s)",
(unsigned long)key_inum(c, key),
get_key_type(type));
break;
default:
sprintf(p, "(bad key type: %#08x, %#08x)",
key->u32[0], key->u32[1]);
}
} else
sprintf(p, "bad key format %d", c->key_fmt);
}
/*
* nondata_nodes_cmp - compare 2 non-data nodes.
* @priv: UBIFS file-system description object
* @a: first node
* @a: second node
*
* This function compares nodes @a and @b. It makes sure that inode nodes go
* first and sorted by length in descending order. Directory entry nodes go
* after inode nodes and are sorted in ascending hash valuer order.
*/
static int nondata_nodes_cmp(void *priv, struct list_head *a,
struct list_head *b)
{
ino_t inuma, inumb;
struct ubifs_info *c = priv;
struct ubifs_scan_node *sa, *sb;
cond_resched();
if (a == b)
return 0;
sa = list_entry(a, struct ubifs_scan_node, list);
sb = list_entry(b, struct ubifs_scan_node, list);
ubifs_assert(key_type(c, &sa->key) != UBIFS_DATA_KEY &&
key_type(c, &sb->key) != UBIFS_DATA_KEY);
ubifs_assert(sa->type != UBIFS_DATA_NODE &&
sb->type != UBIFS_DATA_NODE);
/* Inodes go before directory entries */
if (sa->type == UBIFS_INO_NODE) {
if (sb->type == UBIFS_INO_NODE)
return sb->len - sa->len;
return -1;
}
if (sb->type == UBIFS_INO_NODE)
return 1;
ubifs_assert(key_type(c, &sa->key) == UBIFS_DENT_KEY ||
key_type(c, &sa->key) == UBIFS_XENT_KEY);
ubifs_assert(key_type(c, &sb->key) == UBIFS_DENT_KEY ||
key_type(c, &sb->key) == UBIFS_XENT_KEY);
ubifs_assert(sa->type == UBIFS_DENT_NODE ||
sa->type == UBIFS_XENT_NODE);
ubifs_assert(sb->type == UBIFS_DENT_NODE ||
sb->type == UBIFS_XENT_NODE);
inuma = key_inum(c, &sa->key);
inumb = key_inum(c, &sb->key);
if (inuma == inumb) {
uint32_t hasha = key_hash(c, &sa->key);
uint32_t hashb = key_hash(c, &sb->key);
if (hasha <= hashb)
return -1;
} else if (inuma <= inumb)
return -1;
return 1;
}
