Hello all,
I am continuing my journey on the MIPS architecture.
I wanted to add wks files for my MIPS target (Creator Ci40) and do_wic_image failed:
INFO: Creating image(s)...
-rw-r--r-- 1 root root 697932185 Jun 18 13:34 /tmp/development-image-mel-omni-img-creator-ci40.wic/tmp.wic.n3m8x3xo/rootfs_platforma.1.ext4
Unsupported ioctl: cmd=0x0002
Traceback (most recent call last):
File "/home/chombourger/Projects/isar/scripts/lib/wic/filemap.py", line 40, in get_block_size
binary_data = fcntl.ioctl(file_obj, 2, struct.pack('I', 0))
OSError: [Errno 89] Function not implemented
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/chombourger/Projects/isar/scripts/lib/wic/filemap.py", line 103, in __init__
self.block_size = get_block_size(self._f_image)
File "/home/chombourger/Projects/isar/scripts/lib/wic/filemap.py", line 42, in get_block_size
raise IOError("Unable to determine block size")
OSError: Unable to determine block size
wic appears to be running from buildchroot-target and therefore under qemu-<arch>-static
evidently mips does not implement the FIGETBSZ ioctl
My options would be:
(1) check if a more recent version of qemu does implement this ioctl
(2) add support for this ioctl in qemu-user
(3) work-around it in wic with something like:
diff --git a/scripts/lib/wic/filemap.py b/scripts/lib/wic/filemap.py
index 080668e..1ce3ace 100644
--- a/scripts/lib/wic/filemap.py
+++ b/scripts/lib/wic/filemap.py
@@ -40,8 +40,13 @@ def get_block_size(file_obj):
# Get the block size of the host file-system for the image file by calling
# the FIGETBSZ ioctl (number 2).
- binary_data = ioctl(file_obj, 2, struct.pack('I', 0))
- return struct.unpack('I', binary_data)[0]
+ try:
+ binary_data = ioctl(file_obj, 2, struct.pack('I', 0))
+ return struct.unpack('I', binary_data)[0]
+ except OSError as err:
+ if err.errno == os.errno.ENOSYS:
+ return 4096
+ raise err
class ErrorNotSupp(Exception):
"""
Ok.
But why are we running wic in buildchroot-target. Comments I have seen in the code only say that it is a prerequisite but do not say why (I should probably check git logs as well)
I wonder if it should run in buildchroot-host context instead (so we still use a host environment we control) but avoid the overhead of qemu emulation for DISTRO_ARCH != amd64
What are your thoughts?
Cedric