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@ -74,16 +74,20 @@ ecryptfs_create_underlying_file(struct inode *lower_dir_inode,
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unsigned int flags_save;
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int rc;
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dentry_save = nd->path.dentry;
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vfsmount_save = nd->path.mnt;
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flags_save = nd->flags;
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nd->path.dentry = lower_dentry;
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nd->path.mnt = lower_mnt;
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nd->flags &= ~LOOKUP_OPEN;
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if (nd) {
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dentry_save = nd->path.dentry;
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vfsmount_save = nd->path.mnt;
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flags_save = nd->flags;
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nd->path.dentry = lower_dentry;
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nd->path.mnt = lower_mnt;
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nd->flags &= ~LOOKUP_OPEN;
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}
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rc = vfs_create(lower_dir_inode, lower_dentry, mode, nd);
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nd->path.dentry = dentry_save;
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nd->path.mnt = vfsmount_save;
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nd->flags = flags_save;
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if (nd) {
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nd->path.dentry = dentry_save;
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nd->path.mnt = vfsmount_save;
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nd->flags = flags_save;
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}
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return rc;
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}
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@ -241,8 +245,7 @@ out:
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*/
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int ecryptfs_lookup_and_interpose_lower(struct dentry *ecryptfs_dentry,
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struct dentry *lower_dentry,
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struct inode *ecryptfs_dir_inode,
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struct nameidata *ecryptfs_nd)
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struct inode *ecryptfs_dir_inode)
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{
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struct dentry *lower_dir_dentry;
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struct vfsmount *lower_mnt;
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@ -290,8 +293,6 @@ int ecryptfs_lookup_and_interpose_lower(struct dentry *ecryptfs_dentry,
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goto out;
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if (special_file(lower_inode->i_mode))
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goto out;
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if (!ecryptfs_nd)
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goto out;
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/* Released in this function */
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page_virt = kmem_cache_zalloc(ecryptfs_header_cache_2, GFP_USER);
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if (!page_virt) {
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@ -348,75 +349,6 @@ out:
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return rc;
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}
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/**
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* ecryptfs_new_lower_dentry
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* @name: The name of the new dentry.
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* @lower_dir_dentry: Parent directory of the new dentry.
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* @nd: nameidata from last lookup.
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*
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* Create a new dentry or get it from lower parent dir.
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*/
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static struct dentry *
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ecryptfs_new_lower_dentry(struct qstr *name, struct dentry *lower_dir_dentry,
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struct nameidata *nd)
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{
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struct dentry *new_dentry;
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struct dentry *tmp;
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struct inode *lower_dir_inode;
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lower_dir_inode = lower_dir_dentry->d_inode;
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tmp = d_alloc(lower_dir_dentry, name);
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if (!tmp)
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return ERR_PTR(-ENOMEM);
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mutex_lock(&lower_dir_inode->i_mutex);
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new_dentry = lower_dir_inode->i_op->lookup(lower_dir_inode, tmp, nd);
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mutex_unlock(&lower_dir_inode->i_mutex);
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if (!new_dentry)
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new_dentry = tmp;
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else
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dput(tmp);
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return new_dentry;
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}
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/**
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* ecryptfs_lookup_one_lower
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* @ecryptfs_dentry: The eCryptfs dentry that we are looking up
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* @lower_dir_dentry: lower parent directory
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* @name: lower file name
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*
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* Get the lower dentry from vfs. If lower dentry does not exist yet,
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* create it.
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*/
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static struct dentry *
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ecryptfs_lookup_one_lower(struct dentry *ecryptfs_dentry,
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struct dentry *lower_dir_dentry, struct qstr *name)
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{
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struct nameidata nd;
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struct vfsmount *lower_mnt;
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int err;
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lower_mnt = mntget(ecryptfs_dentry_to_lower_mnt(
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ecryptfs_dentry->d_parent));
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err = vfs_path_lookup(lower_dir_dentry, lower_mnt, name->name , 0, &nd);
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mntput(lower_mnt);
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if (!err) {
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/* we dont need the mount */
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mntput(nd.path.mnt);
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return nd.path.dentry;
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}
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if (err != -ENOENT)
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return ERR_PTR(err);
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/* create a new lower dentry */
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return ecryptfs_new_lower_dentry(name, lower_dir_dentry, &nd);
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}
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/**
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* ecryptfs_lookup
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* @ecryptfs_dir_inode: The eCryptfs directory inode
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@ -434,7 +366,6 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode,
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size_t encrypted_and_encoded_name_size;
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struct ecryptfs_mount_crypt_stat *mount_crypt_stat = NULL;
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struct dentry *lower_dir_dentry, *lower_dentry;
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struct qstr lower_name;
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int rc = 0;
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if ((ecryptfs_dentry->d_name.len == 1
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@ -444,20 +375,14 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode,
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goto out_d_drop;
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}
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lower_dir_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry->d_parent);
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lower_name.name = ecryptfs_dentry->d_name.name;
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lower_name.len = ecryptfs_dentry->d_name.len;
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lower_name.hash = ecryptfs_dentry->d_name.hash;
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if (lower_dir_dentry->d_op && lower_dir_dentry->d_op->d_hash) {
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rc = lower_dir_dentry->d_op->d_hash(lower_dir_dentry,
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lower_dir_dentry->d_inode, &lower_name);
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if (rc < 0)
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goto out_d_drop;
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}
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lower_dentry = ecryptfs_lookup_one_lower(ecryptfs_dentry,
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lower_dir_dentry, &lower_name);
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mutex_lock(&lower_dir_dentry->d_inode->i_mutex);
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lower_dentry = lookup_one_len(ecryptfs_dentry->d_name.name,
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lower_dir_dentry,
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ecryptfs_dentry->d_name.len);
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mutex_unlock(&lower_dir_dentry->d_inode->i_mutex);
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if (IS_ERR(lower_dentry)) {
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rc = PTR_ERR(lower_dentry);
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ecryptfs_printk(KERN_DEBUG, "%s: lookup_one_lower() returned "
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ecryptfs_printk(KERN_DEBUG, "%s: lookup_one_len() returned "
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"[%d] on lower_dentry = [%s]\n", __func__, rc,
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encrypted_and_encoded_name);
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goto out_d_drop;
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@ -479,28 +404,21 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode,
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"filename; rc = [%d]\n", __func__, rc);
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goto out_d_drop;
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}
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lower_name.name = encrypted_and_encoded_name;
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lower_name.len = encrypted_and_encoded_name_size;
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lower_name.hash = full_name_hash(lower_name.name, lower_name.len);
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if (lower_dir_dentry->d_op && lower_dir_dentry->d_op->d_hash) {
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rc = lower_dir_dentry->d_op->d_hash(lower_dir_dentry,
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lower_dir_dentry->d_inode, &lower_name);
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if (rc < 0)
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goto out_d_drop;
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}
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lower_dentry = ecryptfs_lookup_one_lower(ecryptfs_dentry,
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lower_dir_dentry, &lower_name);
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mutex_lock(&lower_dir_dentry->d_inode->i_mutex);
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lower_dentry = lookup_one_len(encrypted_and_encoded_name,
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lower_dir_dentry,
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encrypted_and_encoded_name_size);
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mutex_unlock(&lower_dir_dentry->d_inode->i_mutex);
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if (IS_ERR(lower_dentry)) {
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rc = PTR_ERR(lower_dentry);
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ecryptfs_printk(KERN_DEBUG, "%s: lookup_one_lower() returned "
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ecryptfs_printk(KERN_DEBUG, "%s: lookup_one_len() returned "
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"[%d] on lower_dentry = [%s]\n", __func__, rc,
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encrypted_and_encoded_name);
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goto out_d_drop;
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}
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lookup_and_interpose:
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rc = ecryptfs_lookup_and_interpose_lower(ecryptfs_dentry, lower_dentry,
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ecryptfs_dir_inode,
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ecryptfs_nd);
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ecryptfs_dir_inode);
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goto out;
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out_d_drop:
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d_drop(ecryptfs_dentry);
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@ -1092,6 +1010,8 @@ int ecryptfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
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rc = vfs_getattr(ecryptfs_dentry_to_lower_mnt(dentry),
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ecryptfs_dentry_to_lower(dentry), &lower_stat);
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if (!rc) {
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fsstack_copy_attr_all(dentry->d_inode,
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ecryptfs_inode_to_lower(dentry->d_inode));
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generic_fillattr(dentry->d_inode, stat);
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stat->blocks = lower_stat.blocks;
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}
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