linux-kernel - [PATCH v3 6/6] composefs: Add kconfig and build support

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Message-Id: <44514e018d5fa27ace5c97c6c30e95a9cca89032.1674227308.git.alexl@redhat.com>
Date:   Fri, 20 Jan 2023 16:23:34 +0100
From:   Alexander Larsson <alexl@...hat.com>
To:     linux-fsdevel@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, gscrivan@...hat.com,
        david@...morbit.com, brauner@...nel.org, viro@...iv.linux.org.uk,
        Alexander Larsson <alexl@...hat.com>
Subject: [PATCH v3 6/6] composefs: Add kconfig and build support

This commit adds Makefile and Kconfig for composefs, and
updates Makefile and Kconfig files in the fs directory

Signed-off-by: Alexander Larsson <alexl@...hat.com>
---
 fs/Kconfig            |  1 +
 fs/Makefile           |  1 +
 fs/composefs/Kconfig  | 18 ++++++++++++++++++
 fs/composefs/Makefile |  5 +++++
 4 files changed, 25 insertions(+)
 create mode 100644 fs/composefs/Kconfig
 create mode 100644 fs/composefs/Makefile

diff --git a/fs/Kconfig b/fs/Kconfig
index 2685a4d0d353..de8493fc2b1e 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -127,6 +127,7 @@ source "fs/quota/Kconfig"
 source "fs/autofs/Kconfig"
 source "fs/fuse/Kconfig"
 source "fs/overlayfs/Kconfig"
+source "fs/composefs/Kconfig"
 
 menu "Caches"
 
diff --git a/fs/Makefile b/fs/Makefile
index 4dea17840761..d16974e02468 100644
--- a/fs/Makefile
+++ b/fs/Makefile
@@ -137,3 +137,4 @@ obj-$(CONFIG_EFIVAR_FS)		+= efivarfs/
 obj-$(CONFIG_EROFS_FS)		+= erofs/
 obj-$(CONFIG_VBOXSF_FS)		+= vboxsf/
 obj-$(CONFIG_ZONEFS_FS)		+= zonefs/
+obj-$(CONFIG_COMPOSEFS_FS)	+= composefs/
diff --git a/fs/composefs/Kconfig b/fs/composefs/Kconfig
new file mode 100644
index 000000000000..88c5b55380e6
--- /dev/null
+++ b/fs/composefs/Kconfig
@@ -0,0 +1,18 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+config COMPOSEFS_FS
+	tristate "Composefs filesystem support"
+	select EXPORTFS
+	help
+	  Composefs is a filesystem that allows combining file content from
+	  existing regular files with a metadata directory structure from
+	  a separate binary file. This is useful to share file content between
+	  many different directory trees, such as in a local container image store.
+
+	  Composefs also allows using fs-verity to validate the content of the
+	  content-files as well as the metadata file which allows dm-verity
+	  like validation with the flexibility of regular files.
+
+	  For more information see Documentation/filesystems/composefs.rst
+
+	  If unsure, say N.
diff --git a/fs/composefs/Makefile b/fs/composefs/Makefile
new file mode 100644
index 000000000000..eac8445e7d25
--- /dev/null
+++ b/fs/composefs/Makefile
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+obj-$(CONFIG_COMPOSEFS_FS) += composefs.o
+
+composefs-objs += cfs-reader.o cfs.o
-- 
2.39.0