/* Audited by: green(2002.06.15) */
item_id item_id_by_coord(const coord_t * coord /* coord to query */ )
{
assert("vs-539", coord != NULL);
assert("vs-538", coord->node != NULL);
assert("vs-537", znode_is_loaded(coord->node));
assert("vs-536", item_plugin_by_coord(coord) != NULL);
assert("vs-540",
item_id_by_plugin(item_plugin_by_coord(coord)) < LAST_ITEM_ID);
return item_id_by_plugin(item_plugin_by_coord(coord));
}
/* return the biggest key contained the unit @coord */
reiser4_key *max_unit_key_by_coord(const coord_t * coord /* coord to query */ ,
reiser4_key * key /* result */ )
{
assert("nikita-772", coord != NULL);
assert("nikita-774", coord->node != NULL);
assert("nikita-775", znode_is_loaded(coord->node));
if (item_plugin_by_coord(coord)->b.max_unit_key != NULL)
return item_plugin_by_coord(coord)->b.max_unit_key(coord, key);
else
return unit_key_by_coord(coord, key);
}
/* mergeable_cde(): implementation of ->mergeable() item method.
Two directory items are mergeable iff they are from the same
directory. That simple.
*/
int mergeable_cde(const coord_t * p1 /* coord of first item */ ,
const coord_t * p2 /* coord of second item */ )
{
reiser4_key k1;
reiser4_key k2;
assert("nikita-1339", p1 != NULL);
assert("nikita-1340", p2 != NULL);
return
(item_plugin_by_coord(p1) == item_plugin_by_coord(p2)) &&
(extract_dir_id_from_key(item_key_by_coord(p1, &k1)) ==
extract_dir_id_from_key(item_key_by_coord(p2, &k2)));
}
/* @data contains data which are to be put into tree */
int can_contain_key_cde(const coord_t * coord /* coord of item */ ,
const reiser4_key * key /* key to check */ ,
const reiser4_item_data * data /* parameters of new
* item/unit being
* created */ )
{
reiser4_key item_key;
/* FIXME-VS: do not rely on anything but iplug field of @data. Only
data->iplug is initialized */
assert("vs-457", data && data->iplug);
/* assert( "vs-553", data -> user == 0 );*/
item_key_by_coord(coord, &item_key);
return (item_plugin_by_coord(coord) == data->iplug) &&
(extract_dir_id_from_key(&item_key) ==
extract_dir_id_from_key(key));
}
/**
* find_start
* @inode:
* @id:
* @offset:
*
* this is used by tail2extent and extent2tail to detect where previous
* uncompleted conversion stopped
*/
static int find_start(struct inode *inode, reiser4_plugin_id id, __u64 *offset)
{
int result;
lock_handle lh;
coord_t coord;
struct unix_file_info *ufo;
int found;
reiser4_key key;
ufo = unix_file_inode_data(inode);
init_lh(&lh);
result = 0;
found = 0;
inode_file_plugin(inode)->key_by_inode(inode, *offset, &key);
do {
init_lh(&lh);
result = find_file_item_nohint(&coord, &lh, &key,
ZNODE_READ_LOCK, inode);
if (result == CBK_COORD_FOUND) {
if (coord.between == AT_UNIT) {
/*coord_clear_iplug(&coord); */
result = zload(coord.node);
if (result == 0) {
if (item_id_by_coord(&coord) == id)
found = 1;
else
item_plugin_by_coord(&coord)->s.
file.append_key(&coord,
&key);
zrelse(coord.node);
}
} else
result = RETERR(-ENOENT);
}
done_lh(&lh);
} while (result == 0 && !found);
*offset = get_key_offset(&key);
return result;
}
