/* Find free atom */
static int get_freeatom(struct inode *atable, atom_t *atom)
{
if(DEBUG_MODE_K==1)
{
printf("\t\t\t\t%25s[K] %25s %4d #in\n",__FILE__,__func__,__LINE__);
}
struct sb *sb = tux_sb(atable->i_sb);
atom_t freeatom = sb->freeatom;
if (!freeatom) {
*atom = sb->atomgen++;
return 0;
}
loff_t next = unatom_dict_read(atable, freeatom);
if (next < 0)
return next;
if (!is_free_unatom(next)) {
tux3_fs_error(sb, "something horrible happened");
return -EIO;
}
*atom = freeatom;
sb->freeatom = next & ~UNATOM_FREE_MASK;
return 0;
}
/* Convert atom to name */
static int unatom(struct inode *atable, atom_t atom, char *name, unsigned size)
{
if(DEBUG_MODE_K==1)
{
printf("\t\t\t\t%25s[K] %25s %4d #in\n",__FILE__,__func__,__LINE__);
}
struct sb *sb = tux_sb(atable->i_sb);
struct buffer_head *buffer;
int err;
loff_t where = unatom_dict_read(atable, atom);
if (where < 0) {
err = where;
goto error;
}
buffer = blockread(mapping(atable), where >> sb->blockbits);
if (!buffer) {
err = -EIO;
goto error;
}
tux_dirent *entry = bufdata(buffer) + (where & sb->blockmask);
if (entry_atom(entry) != atom) {
tux3_fs_error(sb, "atom %x reverse entry broken", atom);
err = -EIO;
goto error_blockput;
}
unsigned len = entry->name_len;
if (size) {
if (len > size) {
err = -ERANGE;
goto error_blockput;
}
memcpy(name, entry->name, len);
}
blockput(buffer);
return len;
error_blockput:
blockput(buffer);
error:
return err;
}
/* Find free atom */
static int get_freeatom(struct inode *atable, atom_t *atom)
{
struct sb *sb = tux_sb(atable->i_sb);
atom_t freeatom = sb->freeatom;
if (!freeatom) {
*atom = sb->atomgen++;
return 0;
}
loff_t next = unatom_dict_read(atable, freeatom);
if (next < 0)
return next;
if (!is_free_unatom(next)) {
tux3_fs_error(sb, "something horrible happened");
return -EIO;
}
*atom = freeatom;
sb->freeatom = next & ~UNATOM_FREE_MASK;
return 0;
}