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wic: make ext2/3/4 images reproducible

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Ext2/3/4 FS contains not only mtime, but also ctime, atime and crtime.
Currently, all the files are being added into the rootfs image using
mkfs -d functionality which affects all the timestamps excluding mtime.
This patch ensures these timestamps inside the FS image equal to
the SOURCE_DATE_EPOCH if it is set.

(From OE-Core rev: e0dc0f4a153f75d14d50d5bc91edb93fac93cd25)

Signed-off-by: Sergei Zhmylev <s.zhmylev@yadro.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
(cherry picked from commit 75d2dd0ea7790db2e8ee921784ca373abff2df65)
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Sergei Zhmylev 2022-11-07 17:24:53 +03:00 committed by Richard Purdie
parent 32342553c8
commit 658a991de2
1 changed files with 24 additions and 5 deletions
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29
scripts/lib/wic/partition.py
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@ -294,17 +294,36 @@ class Partition():
f.write("cd etc\n")
f.write("rm fstab\n")
f.write("write %s fstab\n" % (self.updated_fstab_path))
if os.getenv('SOURCE_DATE_EPOCH'):
fstab_time = int(os.getenv('SOURCE_DATE_EPOCH'))
for time in ["atime", "mtime", "ctime"]:
f.write("set_inode_field fstab %s %s\n" % (time, hex(fstab_time)))
f.write("set_inode_field fstab %s_extra 0\n" % (time))
debugfs_cmd = "debugfs -w -f %s %s" % (debugfs_script_path, rootfs)
exec_native_cmd(debugfs_cmd, native_sysroot)
mkfs_cmd = "fsck.%s -pvfD %s" % (self.fstype, rootfs)
exec_native_cmd(mkfs_cmd, native_sysroot, pseudo=pseudo)
if os.getenv('SOURCE_DATE_EPOCH'):
sde_time = hex(int(os.getenv('SOURCE_DATE_EPOCH')))
debugfs_script_path = os.path.join(cr_workdir, "debugfs_script")
files = []
for root, dirs, others in os.walk(rootfs_dir):
base = root.replace(rootfs_dir, "").rstrip(os.sep)
files += [ "/" if base == "" else base ]
files += [ base + "/" + n for n in dirs + others ]
with open(debugfs_script_path, "w") as f:
f.write("set_current_time %s\n" % (sde_time))
if self.updated_fstab_path and self.has_fstab and not self.no_fstab_update:
f.write("set_inode_field /etc/fstab mtime %s\n" % (sde_time))
f.write("set_inode_field /etc/fstab mtime_extra 0\n")
for file in set(files):
for time in ["atime", "ctime", "crtime"]:
f.write("set_inode_field \"%s\" %s %s\n" % (file, time, sde_time))
f.write("set_inode_field \"%s\" %s_extra 0\n" % (file, time))
for time in ["wtime", "mkfs_time", "lastcheck"]:
f.write("set_super_value %s %s\n" % (time, sde_time))
for time in ["mtime", "first_error_time", "last_error_time"]:
f.write("set_super_value %s 0\n" % (time))
debugfs_cmd = "debugfs -w -f %s %s" % (debugfs_script_path, rootfs)
exec_native_cmd(debugfs_cmd, native_sysroot)
self.check_for_Y2038_problem(rootfs, native_sysroot)
def prepare_rootfs_btrfs(self, rootfs, cr_workdir, oe_builddir, rootfs_dir,