rbd: new request handling code

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The notable changes are:

- instead of explicitly stat'ing the object to see if it exists before
  issuing the write, send the write optimistically along with the stat
  in a single OSD request
- zero copyup optimization
- all object requests are associated with an image request and have
  a valid ->img_request pointer; there are no standalone (!IMG_DATA)
  object requests anymore
- code is structured as a state machine (vs a bunch of callbacks with
  implicit state)

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

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This commit is contained in:

Ilya Dryomov 2018-01-29 14:04:08 +01:00

parent 45a267dbb4

commit 3da691bf43

1 changed files with 601 additions and 77 deletions

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drivers/block/rbd.c

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