int au_reval_dpath(struct dentry *dentry, unsigned int sigen)
{
int err;
struct dentry *d, *parent;
struct inode *inode;
if (!au_ftest_si(au_sbi(dentry->d_sb), FAILED_REFRESH_DIR))
return simple_reval_dpath(dentry, sigen);
/* slow loop, keep it simple and stupid */
/* cf: au_cpup_dirs() */
err = 0;
parent = NULL;
while (au_digen_test(dentry, sigen)) {
d = dentry;
while (1) {
dput(parent);
parent = dget_parent(d);
if (!au_digen_test(parent, sigen))
break;
d = parent;
}
inode = d->d_inode;
if (d != dentry)
di_write_lock_child2(d);
/* someone might update our dentry while we were sleeping */
if (au_digen_test(d, sigen)) {
/*
* todo: consolidate with simple_reval_dpath(),
* do_refresh() and au_reval_for_attr().
*/
di_read_lock_parent(parent, AuLock_IR);
err = au_refresh_dentry(d, parent);
di_read_unlock(parent, AuLock_IR);
}
if (d != dentry)
di_write_unlock(d);
dput(parent);
if (unlikely(err))
break;
}
return err;
}
/* todo: consolidate with do_refresh() and au_reval_for_attr() */
static int simple_reval_dpath(struct dentry *dentry, unsigned int sigen)
{
int err;
struct dentry *parent;
if (!au_digen_test(dentry, sigen))
return 0;
parent = dget_parent(dentry);
di_read_lock_parent(parent, AuLock_IR);
AuDebugOn(au_digen_test(parent, sigen));
au_dbg_verify_gen(parent, sigen);
err = au_refresh_dentry(dentry, parent);
di_read_unlock(parent, AuLock_IR);
dput(parent);
AuTraceErr(err);
return err;
}
/* todo: consolidate with do_refresh() and simple_reval_dpath() */
static int au_reval_for_attr(struct dentry *dentry, unsigned int sigen)
{
int err;
struct inode *inode;
struct dentry *parent;
err = 0;
inode = dentry->d_inode;
if (au_digen_test(dentry, sigen)) {
parent = dget_parent(dentry);
di_read_lock_parent(parent, AuLock_IR);
err = au_refresh_dentry(dentry, parent);
di_read_unlock(parent, AuLock_IR);
dput(parent);
}
AuTraceErr(err);
return err;
}
