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From: Bernd Eckenfels <W1012@lina.inka.de>
To: linux-kernel@vger.kernel.org
Subject: Re: [BUG] tmpfs and loop
In-Reply-To: <01041321112600.23961@oscar>
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Date: Sat, 14 Apr 2001 10:45:20 +0200
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In article <01041321112600.23961@oscar> you wrote:
> oscar% sudo mount /tmp/disk /snap -oloop -text2
> ioctl: LOOP_SET_FD: Invalid argument

are you sure you have a working loop device? Try to verify it in a non tmpfs
filesystem.

> stat64("/dev/loop0", {st_mode=S_IFBLK|0660, st_rdev=makedev(7, 0), ...}) = 0
> open("/dev/loop0", O_RDONLY|O_LARGEFILE) = 3
> ioctl(3, 0x4c03, 0xbffff7fc)            = -1 ENXIO (No such device or address)

otherwise try this by hand with losetup.

> close(3)                                = 0
> open("/tmp/disk", O_RDWR|O_LARGEFILE)   = 3
> open("/dev/loop0", O_RDWR|O_LARGEFILE)  = 4
> mlockall(MCL_CURRENT|MCL_FUTURE)        = 0
> ioctl(4, 0x4c00, 0x3)                   = -1 EINVAL (Invalid argument)
> write(2, "ioctl: LOOP_SET_FD: Invalid argu"..., 37ioctl: LOOP_SET_FD: Invalid argument

Greetings
Bernd
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