lguest: clean up length-used value in example launcher

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The "len" field in the used ring for virtio indicates the number of
bytes *written* to the buffer.  This means the guest doesn't have to
zero the buffers in advance as it always knows the used length.

Erroneously, the console and network example code puts the length
*read* into that field.  The guest ignores it, but it's wrong.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

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This commit is contained in:

Rusty Russell 2009-06-12 22:27:04 -06:00

parent f086122bb6

commit e606490c44

1 changed files with 4 additions and 7 deletions

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Documentation/lguest/lguest.c

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