C++ (Cpp) dbg_check_name Examples

Example #1

File: dir.c Project: DenisLug/mptcp

static struct dentry *ubifs_lookup(struct inode *dir, struct dentry *dentry,
				   unsigned int flags)
{
	int err;
	union ubifs_key key;
	struct inode *inode = NULL;
	struct ubifs_dent_node *dent;
	struct ubifs_info *c = dir->i_sb->s_fs_info;

	dbg_gen("'%pd' in dir ino %lu", dentry, dir->i_ino);

	if (dentry->d_name.len > UBIFS_MAX_NLEN)
		return ERR_PTR(-ENAMETOOLONG);

	dent = kmalloc(UBIFS_MAX_DENT_NODE_SZ, GFP_NOFS);
	if (!dent)
		return ERR_PTR(-ENOMEM);

	dent_key_init(c, &key, dir->i_ino, &dentry->d_name);

	err = ubifs_tnc_lookup_nm(c, &key, dent, &dentry->d_name);
	if (err) {
		if (err == -ENOENT) {
			dbg_gen("not found");
			goto done;
		}
		goto out;
	}

	if (dbg_check_name(c, dent, &dentry->d_name)) {
		err = -EINVAL;
		goto out;
	}

	inode = ubifs_iget(dir->i_sb, le64_to_cpu(dent->inum));
	if (IS_ERR(inode)) {
		/*
		 * This should not happen. Probably the file-system needs
		 * checking.
		 */
		err = PTR_ERR(inode);
		ubifs_err(c, "dead directory entry '%pd', error %d",
			  dentry, err);
		ubifs_ro_mode(c, err);
		goto out;
	}

done:
	kfree(dent);
	/*
	 * Note, d_splice_alias() would be required instead if we supported
	 * NFS.
	 */
	d_add(dentry, inode);
	return NULL;

out:
	kfree(dent);
	return ERR_PTR(err);
}

Example #2

File: dir.c Project: SantoshShilimkar/linux

static struct dentry *ubifs_lookup(struct inode *dir, struct dentry *dentry,
				   unsigned int flags)
{
	int err;
	union ubifs_key key;
	struct inode *inode = NULL;
	struct ubifs_dent_node *dent;
	struct ubifs_info *c = dir->i_sb->s_fs_info;
	struct fscrypt_name nm;

	dbg_gen("'%pd' in dir ino %lu", dentry, dir->i_ino);

	if (ubifs_crypt_is_encrypted(dir)) {
		err = fscrypt_get_encryption_info(dir);

		/*
		 * DCACHE_ENCRYPTED_WITH_KEY is set if the dentry is
		 * created while the directory was encrypted and we
		 * have access to the key.
		 */
		if (fscrypt_has_encryption_key(dir))
			fscrypt_set_encrypted_dentry(dentry);
		fscrypt_set_d_op(dentry);
		if (err && err != -ENOKEY)
			return ERR_PTR(err);
	}

	err = fscrypt_setup_filename(dir, &dentry->d_name, 1, &nm);
	if (err)
		return ERR_PTR(err);

	if (fname_len(&nm) > UBIFS_MAX_NLEN) {
		err = -ENAMETOOLONG;
		goto out_fname;
	}

	dent = kmalloc(UBIFS_MAX_DENT_NODE_SZ, GFP_NOFS);
	if (!dent) {
		err = -ENOMEM;
		goto out_fname;
	}

	if (nm.hash) {
		ubifs_assert(fname_len(&nm) == 0);
		ubifs_assert(fname_name(&nm) == NULL);
		dent_key_init_hash(c, &key, dir->i_ino, nm.hash);
		err = ubifs_tnc_lookup_dh(c, &key, dent, nm.minor_hash);
	} else {
		dent_key_init(c, &key, dir->i_ino, &nm);
		err = ubifs_tnc_lookup_nm(c, &key, dent, &nm);
	}

	if (err) {
		if (err == -ENOENT) {
			dbg_gen("not found");
			goto done;
		}
		goto out_dent;
	}

	if (dbg_check_name(c, dent, &nm)) {
		err = -EINVAL;
		goto out_dent;
	}

	inode = ubifs_iget(dir->i_sb, le64_to_cpu(dent->inum));
	if (IS_ERR(inode)) {
		/*
		 * This should not happen. Probably the file-system needs
		 * checking.
		 */
		err = PTR_ERR(inode);
		ubifs_err(c, "dead directory entry '%pd', error %d",
			  dentry, err);
		ubifs_ro_mode(c, err);
		goto out_dent;
	}

	if (ubifs_crypt_is_encrypted(dir) &&
	    (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
	    !fscrypt_has_permitted_context(dir, inode)) {
		ubifs_warn(c, "Inconsistent encryption contexts: %lu/%lu",
			   dir->i_ino, inode->i_ino);
		err = -EPERM;
		goto out_inode;
	}

done:
	kfree(dent);
	fscrypt_free_filename(&nm);
	/*
	 * Note, d_splice_alias() would be required instead if we supported
	 * NFS.
	 */
	d_add(dentry, inode);
	return NULL;

out_inode:
	iput(inode);
out_dent:
	kfree(dent);
out_fname:
	fscrypt_free_filename(&nm);
	return ERR_PTR(err);
}