/* todo: remove this */
static int h_d_revalidate(struct dentry *dentry, struct inode *inode,
struct nameidata *nd, int do_udba)
{
int err;
umode_t mode, h_mode;
aufs_bindex_t bindex, btail, bstart, ibs, ibe;
unsigned char plus, unhashed, is_root, h_plus;
struct inode *h_inode, *h_cached_inode;
struct dentry *h_dentry;
struct qstr *name, *h_name;
err = 0;
plus = 0;
mode = 0;
ibs = -1;
ibe = -1;
unhashed = !!d_unhashed(dentry);
is_root = !!IS_ROOT(dentry);
name = &dentry->d_name;
/*
* Theoretically, REVAL test should be unnecessary in case of INOTIFY.
* But inotify doesn't fire some necessary events,
* IN_ATTRIB for atime/nlink/pageio
* IN_DELETE for NFS dentry
* Let's do REVAL test too.
*/
if (do_udba && inode) {
mode = (inode->i_mode & S_IFMT);
plus = (inode->i_nlink > 0);
ibs = au_ibstart(inode);
ibe = au_ibend(inode);
}
bstart = au_dbstart(dentry);
btail = bstart;
if (inode && S_ISDIR(inode->i_mode))
btail = au_dbtaildir(dentry);
for (bindex = bstart; bindex <= btail; bindex++) {
h_dentry = au_h_dptr(dentry, bindex);
if (!h_dentry)
continue;
AuDbg("b%d, %.*s\n", bindex, AuDLNPair(h_dentry));
h_name = &h_dentry->d_name;
if (unlikely(do_udba
&& !is_root
&& (unhashed != !!d_unhashed(h_dentry)
|| name->len != h_name->len
|| memcmp(name->name, h_name->name, name->len))
)) {
AuDbg("unhash 0x%x 0x%x, %.*s %.*s\n",
unhashed, d_unhashed(h_dentry),
AuDLNPair(dentry), AuDLNPair(h_dentry));
goto err;
}
err = au_do_h_d_reval(h_dentry, nd, dentry, bindex);
if (unlikely(err))
/* do not goto err, to keep the errno */
break;
/* todo: plink too? */
if (!do_udba)
continue;
/* UDBA tests */
h_inode = h_dentry->d_inode;
if (unlikely(!!inode != !!h_inode))
goto err;
h_plus = plus;
h_mode = mode;
h_cached_inode = h_inode;
if (h_inode) {
h_mode = (h_inode->i_mode & S_IFMT);
h_plus = (h_inode->i_nlink > 0);
}
if (inode && ibs <= bindex && bindex <= ibe)
h_cached_inode = au_h_iptr(inode, bindex);
if (unlikely(plus != h_plus
|| mode != h_mode
|| h_cached_inode != h_inode))
goto err;
continue;
err:
err = -EINVAL;
break;
}
return err;
}
/* todo: remove this */
static int h_d_revalidate(struct dentry *dentry, struct inode *inode,
unsigned int flags, int do_udba)
{
int err;
umode_t mode, h_mode;
aufs_bindex_t bindex, btail, bstart, ibs, ibe;
unsigned char plus, unhashed, is_root, h_plus, h_nfs, tmpfile;
struct inode *h_inode, *h_cached_inode;
struct dentry *h_dentry;
struct qstr *name, *h_name;
err = 0;
plus = 0;
mode = 0;
ibs = -1;
ibe = -1;
unhashed = !!d_unhashed(dentry);
is_root = !!IS_ROOT(dentry);
name = &dentry->d_name;
tmpfile = au_di(dentry)->di_tmpfile;
/*
* Theoretically, REVAL test should be unnecessary in case of
* {FS,I}NOTIFY.
* But {fs,i}notify doesn't fire some necessary events,
* IN_ATTRIB for atime/nlink/pageio
* Let's do REVAL test too.
*/
if (do_udba && inode) {
mode = (inode->i_mode & S_IFMT);
plus = (inode->i_nlink > 0);
ibs = au_ibstart(inode);
ibe = au_ibend(inode);
}
bstart = au_dbstart(dentry);
btail = bstart;
if (inode && S_ISDIR(inode->i_mode))
btail = au_dbtaildir(dentry);
for (bindex = bstart; bindex <= btail; bindex++) {
h_dentry = au_h_dptr(dentry, bindex);
if (!h_dentry)
continue;
AuDbg("b%d, %pd\n", bindex, h_dentry);
h_nfs = !!au_test_nfs(h_dentry->d_sb);
spin_lock(&h_dentry->d_lock);
h_name = &h_dentry->d_name;
if (unlikely(do_udba
&& !is_root
&& ((!h_nfs
&& (unhashed != !!d_unhashed(h_dentry)
|| (!tmpfile
&& !au_qstreq(name, h_name))
))
|| (h_nfs
&& !(flags & LOOKUP_OPEN)
&& (h_dentry->d_flags
& DCACHE_NFSFS_RENAMED)))
)) {
int h_unhashed;
h_unhashed = d_unhashed(h_dentry);
spin_unlock(&h_dentry->d_lock);
AuDbg("unhash 0x%x 0x%x, %pd %pd\n",
unhashed, h_unhashed, dentry, h_dentry);
goto err;
}
spin_unlock(&h_dentry->d_lock);
err = au_do_h_d_reval(h_dentry, flags, dentry, bindex);
if (unlikely(err))
/* do not goto err, to keep the errno */
break;
/* todo: plink too? */
if (!do_udba)
continue;
/* UDBA tests */
if (unlikely(!!inode != d_is_positive(h_dentry)))
goto err;
h_inode = NULL;
if (d_is_positive(h_dentry))
h_inode = d_inode(h_dentry);
h_plus = plus;
h_mode = mode;
h_cached_inode = h_inode;
if (h_inode) {
h_mode = (h_inode->i_mode & S_IFMT);
h_plus = (h_inode->i_nlink > 0);
}
if (inode && ibs <= bindex && bindex <= ibe)
h_cached_inode = au_h_iptr(inode, bindex);
if (!h_nfs) {
if (unlikely(plus != h_plus && !tmpfile))
goto err;
} else {
if (unlikely(!(h_dentry->d_flags & DCACHE_NFSFS_RENAMED)
&& !is_root
&& !IS_ROOT(h_dentry)
&& unhashed != d_unhashed(h_dentry)))
goto err;
}
if (unlikely(mode != h_mode
|| h_cached_inode != h_inode))
goto err;
continue;
err:
err = -EINVAL;
break;
}
AuTraceErr(err);
return err;
}
