search for: ext3_wait_for_readon

...vice immutable. It does this by setting a flag which is tested in submit_bh(). For WRITE requests submit_bh() will simply call bh_end_io(uptodate=1) and return. There's a new ext3 ioctl() which will block the caller until the device has gone readonly. I semi-randomly chose #define EXT3_WAIT_FOR_READONLY _IOR('w', 1, long) The intent here is that a controlling script will: 1: Mount the fs with ro-after=1000 (Ten seconds) 2: Start a test script (eg: dbench) 3: Block on the wait-for-readonly ioctl 4: wake up when the disk has "crashed" 5: Kill off the test script...