When active MDS wants to fragment a replica dirfrag, it should set
the 'replay' parameter of MDCache::adjust_dir_fragments() to false.
It makes sure that CDir::merge/split wake up any dentry waiter.
Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
After ScatterLock::infer_state_from_strong_rejoin() set scatterlock
to LOCK_MIX state, don't change the scatterlock to other state.
Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Otherwise the flushing flag may confuse Locker::eval_gather() if MDS later
imports lock's parent inode.
Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
check_clone() allocates temporary good_buf and temp_buf with malloc(),
which is not good enough for krbd with O_DIRECT.
Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Wire up O_DIRECT mode (-Z) for krbd, to have a workaround for possible
problems with BLKDISCARD leaving stale entries in the buffer cache in
place.
Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
docloseopen() always opens $iname image. This is bad, because the
image we had opened could have been something like $iname-clone3. Fix
it by leveraging the fact that rbd_ctx has an image name field.
Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Add krbd mode support (-K) to test krbd in the same way librbd is
tested. This introduces a dependency on libkrbd and, because it's
a C++ static library, requires C++ linking. The rbd_operations
framework can be extended in the future to also test rbd_fuse.
Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
In preparation for krbd mode support, introduce an option to disable
randomized striping. The kernel as of 3.15 does not support "fancy"
striping and will not map images with non-default striping values.
Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
In preparation for krbd mode support, provide an option to specify
alignment for discards. The kernel will reject discard requests whose
offset and length are not sector-size aligned.
Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
In preparation for krbd mode support, change check_trunc_hack() to
resize to a sector-size aligned value. The kernel will not work with
images whose size is not sector-size aligned.
Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Use posix_memalign() to allocate good_buf and temp_buf, which must be
writebdy and readbdy aligned respectively. Using round_ptr_up() the
way it is used makes fsx crash on free()s at the end of main(), because
the pointer returned by malloc() is overwritten by the aligned pointer.
Drop round_ptr_up() as it is no longer used.
Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
fast dispatch
This series adds an ms_fast_dispatch interface to the Messenger/Dispatcher, designed so that you can dispatch messages directly from the Pipe threads without going through the Dispatch queue.
It also sets the OSD to make use of this interface for most operations, and switches to finer-grained locking and use of local data in a bunch of different paths to enable that.
Reviewed-by: Samuel Just <sam.just@inktank.com>
