[Buildroot] [PATCH 4/5] fs/custom: add support for squashfs

[Yann E. MORIN]

From: "Yann E. MORIN" <yann.morin.1998 at free.fr>

Signed-off-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
Cc: Ryan Barnett <rjbarnet at rockwellcollins.com>
---
 docs/manual/partition-layout.txt | 11 ++++++++++-
 fs/custom/fs/squashfs            | 19 +++++++++++++++++++
 2 files changed, 29 insertions(+), 1 deletion(-)
 create mode 100644 fs/custom/fs/squashfs

diff --git a/docs/manual/partition-layout.txt b/docs/manual/partition-layout.txt
index 092ae1b..e9027bf 100644
--- a/docs/manual/partition-layout.txt
+++ b/docs/manual/partition-layout.txt
@@ -133,7 +133,8 @@ Properties for +type=fs+
 
 * +fs_type+ (mandatory): the type of filesystem to generate
 ** +ext+: generate an extended filesystem (ext2, ext3, ext4)
-** +vfat+: generate a VFAT filesystem (FAT16, FAT32)
+** +squashfs+: generate a squashfs (version 4) filesystem
+** +vfat+: generate a VFAT filesystem (FAT12, FAT16 or FAT32)
 
 * +fs_label+ (optional): the label to assign to this filesystem, if that
   filesystem supports a label
@@ -177,6 +178,14 @@ Properties for +fs_type=ext+
 ** +1+ (mandatory for ext3 or ext4): generate a revision 1 extended
    filesystem
 
+Properties for +fs_type=squashfs+
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+* +squashfs_comp+ (mandatory): the compression type to use
+** +gzip+, +xz+, +lzo+: gzip, xz or lzo compression
+
+* +squashfs_block+ (optional): the size of blocks, in bytes
+
 Properties for +fs_type=vfat+
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
diff --git a/fs/custom/fs/squashfs b/fs/custom/fs/squashfs
new file mode 100644
index 0000000..132d3ef
--- /dev/null
+++ b/fs/custom/fs/squashfs
@@ -0,0 +1,19 @@
+# Create a squashfs filesystem
+
+#-----------------------------------------------------------------------------
+DEPENDS+=( squashfs )
+
+#-----------------------------------------------------------------------------
+do_image() {
+    local root_dir="${1}"
+    local img="${2}"
+    local -a fs_opts
+
+    fs_opts+=( -no-progress -noappend )
+    [ -z "${squashfs_comp}"  ] || fs_opts+=( -comp "${squashfs_comp}" )
+    [ -z "${squashfs_block}" ] || fs_opts+=( -b ${squahsfs_block} )
+
+    mksquashfs "${root_dir}" "${img}" "${fs_opts[@]}" >/dev/null
+}
+
+# vim: ft=sh
-- 
1.8.1.2