static int
smb_refill_dir_cache(struct smb_server *server, struct inode *dir,
unsigned long f_pos)
{
int result;
static struct semaphore sem = MUTEX;
int i;
ino_t ino;
do
{
down(&sem);
result = smb_proc_readdir(server, dir, f_pos,
SMB_READDIR_CACHE_SIZE, c_entry);
if (result <= 0)
{
smb_invalid_dir_cache(dir->i_ino);
up(&sem);
return result;
}
c_seen_eof = (result < SMB_READDIR_CACHE_SIZE);
c_dev = dir->i_dev;
c_ino = dir->i_ino;
c_size = result;
c_last_returned_index = 0;
ino = smb_fresh_inodes(server, c_size);
for (i = 0; i < c_size; i++)
{
c_entry[i].f_ino = ino;
ino += 1;
}
up(&sem);
}
while ((c_dev != dir->i_dev) || (c_ino != dir->i_ino));
return result;
}
int
smb_refill_dircache(struct cache_head * cachep, struct dentry *dentry)
{
struct inode * inode = dentry->d_inode;
int result;
VERBOSE("cache %s/%s, blocks=%d\n", DENTRY_PATH(dentry), cachep->pages);
/*
* Fill the cache, starting at position 2.
*/
retry:
inode->u.smbfs_i.cache_valid |= SMB_F_CACHEVALID;
result = smb_proc_readdir(dentry, 2, cachep);
if (result < 0)
{
PARANOIA("readdir failed, result=%d\n", result);
goto out;
}
/*
* Check whether the cache was invalidated while
* we were doing the scan ...
*/
if (!(inode->u.smbfs_i.cache_valid & SMB_F_CACHEVALID))
{
PARANOIA("cache invalidated, retrying\n");
goto retry;
}
result = cachep->status;
if (!result)
{
cachep->valid = 1;
cachep->mtime = dentry->d_inode->i_mtime;
}
VERBOSE("cache %s/%s status=%d, entries=%d\n",
DENTRY_PATH(dentry), cachep->status, cachep->entries);
out:
return result;
}
