[Devel] [PATCH rh7 0/4] ploop: push_backup

[Maxim Patlasov]

The following series implements new feature: ploop push_backup.

The idea is to suspend all incoming WRITE-requests until userspace
backup application reports explicitly that corresponding parts of
ploop block device are "pushed" -- i.e. stored in backup.

To improve latency, the kernel ploop tells userspace about suspended
requests. This lets userspace to "push" correspondign parts of device
out-of-band. After that, the userspace may tell kernel to re-schedule
those requests.

https://jira.sw.ru/browse/PSBM-45000

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Maxim Patlasov (4):
      ploop: introduce pbd
      ploop: implement PLOOP_IOC_PUSH_BACKUP_IO
      ploop: wire push_backup into state-machine
      ploop: push_backup cleanup


 drivers/block/ploop/Makefile      |    2 
 drivers/block/ploop/dev.c         |  226 +++++++++++++++
 drivers/block/ploop/push_backup.c |  564 +++++++++++++++++++++++++++++++++++++
 drivers/block/ploop/push_backup.h |   19 +
 include/linux/ploop/ploop.h       |    4 
 include/linux/ploop/ploop_if.h    |   42 +++
 6 files changed, 856 insertions(+), 1 deletion(-)
 create mode 100644 drivers/block/ploop/push_backup.c
 create mode 100644 drivers/block/ploop/push_backup.h

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