Initial remote commit

test/patch3.sh

@@ -0,0 +1,40 @@
+python3 -c "
+import struct
+
+data = bytearray(open('/tmp/merged_gdt.bin','rb').read())
+
+# Fix group 0 specifically
+# It has flags=0x0004 (INODE_ZEROED) but missing INODE_UNINIT
+# and has non-zero ib_csum=0x9f37 which won't match zeroed bitmap
+
+g = 0
+off = 0  # group 0 offset in GDT
+
+flags = struct.unpack_from('<H', data, off+18)[0]
+print(f'Group 0 flags before: 0x{flags:04x}')
+
+# Set INODE_UNINIT (0x0002) so libext2fs skips inode bitmap validation
+flags |= 0x0002
+struct.pack_into('<H', data, off+18, flags)
+
+# Zero the inode bitmap checksum to match actual zeroed data
+struct.pack_into('<H', data, off+26, 0)  # ib_csum_lo
+struct.pack_into('<H', data, off+50, 0)  # ib_csum_hi
+
+print(f'Group 0 flags after:  0x{flags:04x}')
+print(f'Group 0 ib_csum now:  0x0000')
+
+with open('/tmp/merged_gdt.bin','wb') as f:
+    f.write(data)
+print('Saved')
+"
+
+# Restart server
+pkill -f nbd_server
+nbd-client -d /dev/nbd0 2>/dev/null
+sleep 1
+python3 nbd_server_v9.py &
+sleep 2
+nbd-client 127.0.0.1 10809 /dev/nbd0 -N ""
+
+e2fsck -n /dev/nbd0 2>&1 | head -20