/**
* ecryptfs_lookup_interpose - Dentry interposition for a lookup
*/
static int ecryptfs_lookup_interpose(struct dentry *dentry,
struct dentry *lower_dentry,
struct inode *dir_inode)
{
struct inode *inode, *lower_inode = lower_dentry->d_inode;
struct ecryptfs_dentry_info *dentry_info;
struct vfsmount *lower_mnt;
int rc = 0;
lower_mnt = mntget(ecryptfs_dentry_to_lower_mnt(dentry->d_parent));
fsstack_copy_attr_atime(dir_inode, lower_dentry->d_parent->d_inode);
BUG_ON(!lower_dentry->d_count);
dentry_info = kmem_cache_alloc(ecryptfs_dentry_info_cache, GFP_KERNEL);
ecryptfs_set_dentry_private(dentry, dentry_info);
if (!dentry_info) {
printk(KERN_ERR "%s: Out of memory whilst attempting "
"to allocate ecryptfs_dentry_info struct\n",
__func__);
dput(lower_dentry);
mntput(lower_mnt);
d_drop(dentry);
return -ENOMEM;
}
ecryptfs_set_dentry_lower(dentry, lower_dentry);
ecryptfs_set_dentry_lower_mnt(dentry, lower_mnt);
if (!lower_dentry->d_inode) {
/* We want to add because we couldn't find in lower */
d_add(dentry, NULL);
return 0;
}
inode = __ecryptfs_get_inode(lower_inode, dir_inode->i_sb);
if (IS_ERR(inode)) {
printk(KERN_ERR "%s: Error interposing; rc = [%ld]\n",
__func__, PTR_ERR(inode));
return PTR_ERR(inode);
}
if (S_ISREG(inode->i_mode)) {
rc = ecryptfs_i_size_read(dentry, inode);
if (rc) {
make_bad_inode(inode);
return rc;
}
}
if (inode->i_state & I_NEW)
unlock_new_inode(inode);
d_add(dentry, inode);
return rc;
}
/**
* ecryptfs_lookup_interpose - Dentry interposition for a lookup
*/
static struct dentry *ecryptfs_lookup_interpose(struct dentry *dentry,
struct dentry *lower_dentry)
{
struct inode *inode, *lower_inode = d_inode(lower_dentry);
struct ecryptfs_dentry_info *dentry_info;
struct vfsmount *lower_mnt;
int rc = 0;
dentry_info = kmem_cache_alloc(ecryptfs_dentry_info_cache, GFP_KERNEL);
if (!dentry_info) {
printk(KERN_ERR "%s: Out of memory whilst attempting "
"to allocate ecryptfs_dentry_info struct\n",
__func__);
dput(lower_dentry);
return ERR_PTR(-ENOMEM);
}
lower_mnt = mntget(ecryptfs_dentry_to_lower_mnt(dentry->d_parent));
fsstack_copy_attr_atime(d_inode(dentry->d_parent),
d_inode(lower_dentry->d_parent));
BUG_ON(!d_count(lower_dentry));
ecryptfs_set_dentry_private(dentry, dentry_info);
dentry_info->lower_path.mnt = lower_mnt;
dentry_info->lower_path.dentry = lower_dentry;
if (d_really_is_negative(lower_dentry)) {
/* We want to add because we couldn't find in lower */
d_add(dentry, NULL);
return NULL;
}
inode = __ecryptfs_get_inode(lower_inode, dentry->d_sb);
if (IS_ERR(inode)) {
printk(KERN_ERR "%s: Error interposing; rc = [%ld]\n",
__func__, PTR_ERR(inode));
return ERR_CAST(inode);
}
if (S_ISREG(inode->i_mode)) {
rc = ecryptfs_i_size_read(dentry, inode);
if (rc) {
make_bad_inode(inode);
return ERR_PTR(rc);
}
}
if (inode->i_state & I_NEW)
unlock_new_inode(inode);
return d_splice_alias(inode, dentry);
}
/**
* ecryptfs_lookup_interpose - Dentry interposition for a lookup
*/
static int ecryptfs_lookup_interpose(struct dentry *dentry,
struct dentry *lower_dentry,
struct inode *dir_inode)
{
struct inode *inode, *lower_inode = lower_dentry->d_inode;
struct ecryptfs_dentry_info *dentry_info;
struct vfsmount *lower_mnt;
int rc = 0;
dentry_info = kmem_cache_alloc(ecryptfs_dentry_info_cache, GFP_KERNEL);
if (!dentry_info) {
printk(KERN_ERR "%s: Out of memory whilst attempting "
"to allocate ecryptfs_dentry_info struct\n",
__func__);
dput(lower_dentry);
return -ENOMEM;
}
lower_mnt = mntget(ecryptfs_dentry_to_lower_mnt(dentry->d_parent));
fsstack_copy_attr_atime(dir_inode, lower_dentry->d_parent->d_inode);
BUG_ON(!lower_dentry->d_count);
ecryptfs_set_dentry_private(dentry, dentry_info);
ecryptfs_set_dentry_lower(dentry, lower_dentry);
ecryptfs_set_dentry_lower_mnt(dentry, lower_mnt);
if (!lower_dentry->d_inode) {
/* We want to add because we couldn't find in lower */
d_add(dentry, NULL);
return 0;
}
inode = __ecryptfs_get_inode(lower_inode, dir_inode->i_sb);
if (IS_ERR(inode)) {
printk(KERN_ERR "%s: Error interposing; rc = [%ld]\n",
__func__, PTR_ERR(inode));
return PTR_ERR(inode);
}
if (S_ISREG(inode->i_mode)) {
rc = ecryptfs_i_size_read(dentry, inode);
if (rc) {
make_bad_inode(inode);
return rc;
}
}
#ifdef CONFIG_SDP
if (S_ISDIR(inode->i_mode) && dentry) {
if(IS_UNDER_ROOT(dentry)) {
struct ecryptfs_mount_crypt_stat *mount_crypt_stat =
&ecryptfs_superblock_to_private(inode->i_sb)->mount_crypt_stat;
printk("Lookup a directoy under root directory of current partition.\n");
if(is_chamber_directory(mount_crypt_stat, (char *)dentry->d_name.name)) {
/*
* When this directory is under ROOT directory and the name is registered
* as Chamber.
*/
printk("This is a chamber directory\n");
set_chamber_flag(inode);
}
} else if(IS_SENSITIVE_DENTRY(dentry->d_parent)) {
/*
* When parent directory is sensitive
*/
struct ecryptfs_crypt_stat *crypt_stat =
&ecryptfs_inode_to_private(inode)->crypt_stat;
printk("Parent %s is sensitive. so this directory is sensitive too\n",
dentry->d_parent->d_name.name);
crypt_stat->flags |= ECRYPTFS_DEK_IS_SENSITIVE;
}
}
#endif
if (inode->i_state & I_NEW)
unlock_new_inode(inode);
d_add(dentry, inode);
return rc;
}
