mke2fs: implement timestamp clamping if SOURCE_DATE_EPOCH is set

When copying files to the newly created file system using "mke2fs -d",
and there are timestamps greater than what is specified by
SOURCE_DATE_EPOCH, clamp the timestamp to the SOURCE_DATE_EPOCH
timestamp.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --git a/misc/create_inode.c b/misc/create_inode.c
index 8310034..e2676a0 100644 (file)
--- a/misc/create_inode.c
+++ b/misc/create_inode.c
@@ -109,6 +109,13 @@ errcode_t add_link(ext2_filsys fs, ext2_ino_t parent_ino,
        return retval;
 }
 
+static time_t clamped_time(ext2_filsys fs, time_t t)
+{
+       if ((fs->flags2 & EXT2_FLAG2_USE_FAKE_TIME) && t > fs->now)
+               return fs->now;
+       return t;
+}
+
 /* Set the uid, gid, mode and time for the inode */
 errcode_t set_inode_extra(ext2_filsys fs, ext2_ino_t ino,
                                 const struct stat *st)
@@ -127,9 +134,9 @@ errcode_t set_inode_extra(ext2_filsys fs, ext2_ino_t ino,
        inode.i_gid = st->st_gid;
        ext2fs_set_i_gid_high(inode, st->st_gid >> 16);
        inode.i_mode = (LINUX_S_IFMT & inode.i_mode) | (~S_IFMT & st->st_mode);
-       ext2fs_inode_xtime_set(&inode, i_atime, st->st_atime);
-       ext2fs_inode_xtime_set(&inode, i_ctime, st->st_ctime);
-       ext2fs_inode_xtime_set(&inode, i_mtime, st->st_mtime);
+       ext2fs_inode_xtime_set(&inode, i_atime, clamped_time(fs, st->st_atime));
+       ext2fs_inode_xtime_set(&inode, i_ctime, clamped_time(fs, st->st_ctime));
+       ext2fs_inode_xtime_set(&inode, i_mtime, clamped_time(fs, st->st_mtime));
 
        retval = ext2fs_write_inode(fs, ino, &inode);
        if (retval)