[SCM] Hurd branch, master, updated. v0.9.git20200930-12-g5641703

[Samuel Thibault]

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- Log -----------------------------------------------------------------
commit 5641703ef043ffc10ab9ab0e15f29ccbe30df7a5
Author: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date:   Sat Nov 14 12:51:03 2020 +0100

    rumpdisk: Support opening a device several times
    
    * rumpdisk/block-rump.c (struct block_data): Make taken field an integer
    instead of a boolean.
    (device_open): When search_bd succeeds, set a new reference and return a
    new port right. Separate out io_return_t err, int fd, and int ret to avoid
    confusions. Simplify the error handling path.
    (device_close): Decrement reference and close rump disk only when
    reaching zero. Also destroy our port.

-----------------------------------------------------------------------

Summary of changes:
 rumpdisk/block-rump.c | 113 ++++++++++++++++++++++++++------------------------
 1 file changed, 58 insertions(+), 55 deletions(-)


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