Previously _iov_iter_fast_forward can fast forward only from the
start of the iovec array. This patch enables fast forward in the
middle of the iovec array.
Change-Id: I801fc46dec3c759e1d754042abe15e7100cbdc17
Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/453734
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
By clearing head_align to zero after using it, we can merge two code
blocks into a single while loop, and replace goto by simple break.
Change-Id: Ia63cd0d7dbf4b9dddf7da93e11351bb46bd04791
Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/454394
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
struct dif_sgl had been used only to iterate the passed iovec
array. This patch utilizes struct dif_sgl and adds a helper
function _dif_sgl_append() to simplify to create iovec array.
_dif_sgl_append() is a static function and we have to add
the callee together when we add any static function.
So this patch adds both even if the patch size is a little
larger.
Besides, iovcnt has been used to mean the number of elements
in the iovec array widely in the DIF library. So this patch
changes the name of it from num_iovs to iovcnt.
Change-Id: I1db4abc8ed4d2c107fe01ec6592f5f6731dc5520
Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/454558
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Previously whenever bdev module went through init>fini>init,
the async modules would trigger assert in spdk_bdev_module_action_done().
This was because starting value for action_in_progress was being
set only once - during registration of the modules.
With this change, modules are set as async just before their init start.
Change-Id: If177a8dc97812b1b264cb61d5ad202ce47fca3b5
Signed-off-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/454614
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Set the PPA to FTL_PPA_INVALID during IO initialization to explicitly
mark it uninitialized.
Change-Id: I75ca1644b59501056f0d4ea8a4f446fd1b770045
Signed-off-by: Konrad Sztyber <konrad.sztyber@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/453684
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Removed unused 'context' parameter. Removed 'lbk' parameter from
next_ppa function signature, as it could be easily deduced from ftl_io
passed as the first argument.
Change-Id: I2b2b699ffc1b282086adcc2d4dc6c4691a87a7c5
Signed-off-by: Konrad Sztyber <konrad.sztyber@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/454228
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Record last processed LBA instead of the first one when tracing IO
completion.
Change-Id: If16a6d0f5a82b5317ab391f9e49c6aa0f372ab97
Signed-off-by: Konrad Sztyber <konrad.sztyber@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/454227
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Replaced all direct accesses to io->lba / io->iov with getter functions,
as they both should behave differently based on the FTL_IO_VECTOR_LBA
flag and io->iov_cnt respectively.
Change-Id: I0d387a2a908cc37afa9e1b97ca5b408cef0d6b08
Signed-off-by: Konrad Sztyber <konrad.sztyber@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/450265
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Allow user to set timeout for poller in management operations.
Now also all management pollers have 5 sec default timeout.
Signed-off-by: Vitaliy Mysak <vitaliy.mysak@intel.com>
Change-Id: Ic75f2b150ef21ccd673b80aa84f16c9a24f90e32
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/453655
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Add stop function to management interface.
It is needed for error handling when execution has to be aborted early.
Example flow:
```
rc = op();
if (rc) {
handle();
vbdev_ocf_mngt_stop();
} else {
vbdev_ocf_mngt_continue();
}
```
This can be improved in the future, because currently, error
handling cannot be a management operation on its own (but should be).
Signed-off-by: Vitaliy Mysak <vitaliy.mysak@intel.com>
Change-Id: I9ba528db8a9957ee561e5c1b5528b16bd143d5d8
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/453654
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
We could run into issues with this if we were using an arbitrarily large
amount of cores to run SPDK.
Change-Id: Ia7add027d7e6ef1ccb4a69ac328dbdf4f2751fd8
Signed-off-by: Seth Howell <seth.howell@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/452250
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
This change unifies the DIF library to use dif_sgl throughout.
Change-Id: I60addcf05e75b823e4dfb216122bf46edbc42e78
Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/454528
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Using for loop is better for a few cases now.
Change-Id: I48e3a276fb860f2b969e7c331bdfdac8102172d7
Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/454527
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Piotr Pelpliński <piotr.pelplinski@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
The struct _iov_iter has been used to iterate the passed iovec array.
Subsequent patches will share the struct among iteration and
creation. To clarify this update, rename the struct _iov_iter to
_dif_sgl. The name sgl has been already adopted widely in SPDK.
Change-Id: Iab81bcb0658fbd0e39305e045c3d0aadba8fc55f
Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/454525
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
The new added API can load file content into a data buffer, which
can be used to read configuration file as well as JSON file, and
we can add WRITE API in future which can be used to implement the
persistent reservation feature.
Change-Id: I9aaca7571648e1ab6dbfdd7cfd6ca34083cbeec2
Signed-off-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/453498
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Make this explicit instead of implicit.
Change-Id: Iab1b856648e1f11722e1f76602f1eee4bc4ed0b5
Signed-off-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/454381
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Replace remove_base() function by smaller ones:
detach_cache(), remove_cache_bdev(),
detach_core(), remove_core_bdev()
This change is necessary for implementing asynchronous unregister using
trylock API.
Also introduce stop status variable because unregister path has changed.
Change-Id: I62599cafacdba685848bd7d32d3d5245907ee4a1
Signed-off-by: Vitaliy Mysak <vitaliy.mysak@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/452416
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reorder function for register and unregister path to make code more
readable.
Change-Id: I3479b231de1f6a4f84f9538f345e62eb73e6847c
Signed-off-by: Vitaliy Mysak <vitaliy.mysak@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/452415
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
stop_vbdev() is management a function so it should be one of the steps
of unregister_path[]. It will have to be when stoping is asynchronous,
but right now it is not a hard requirement.
remove_base() no longer calls stop_vbdev() because that was actually a
dead code.
Signed-off-by: Vitaliy Mysak <vitaliy.mysak@intel.com>
Change-Id: Ie2d87da0fbe7807efea084181ea386b323e6b9d8
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/453653
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
This is just for readability.
Change-Id: Ic2a62ded78146c5b8736b6b7daebda1f3d5e3c47
Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/454414
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Some data is freed but is cleared to zero just before the free.
They are not necessary and can be removed.
Change-Id: Ia4d789ef77c22059c412ee3c974ab0cf068d6c67
Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/454412
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Currently the nvme driver will always log any
request completed with error status. Some
applications may not want this behavior. So provide
an option to disable it at the controller level.
When this option is enabled, any failed requests
from queues associated with that controller
(including the admin queue) will not log the
failed request.
Of course the application will still receive
the failed status code and can decide to do its
own logging there.
Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: Ia093fcd23cf321a820fd53183ee7e2dac4f9d378
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/454081
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
This will (finally) enable resets for fabrics
controllers.
Move some of the work previously done in enable_admin_queue
up to this new disconnect/connect logic.
Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I6239f0c0f36192db921d33f2322b1874b9382a01
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/453939
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
This will be used on the adminq, and set while the
qpair is connecting. It allows the qpair_process_completions
routine to know that it should still try to process completions,
even if the controller is resetting.
Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I377b9c934295eb5f45f03efd90c2a268defb4bd4
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/453938
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
For fabrics controllers, the fabrics cmds are what gets
the controller out of reset.
Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I6804874e867466669a55dff11a0a865add8bbc99
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/453937
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
We cannot complete error reqs from spdk_nvme_ctrlr_reset -
this could result in completions on threads not expected
by the user for I/O queues.
Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I2e266a2618f1791ef1a1b713d1940357f23f7bff
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/453932
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
We are going to use it earlier in this file in an
upcoming patch.
Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: Ie388ca76370e53465edb73a99d191492580603c9
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/453930
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
This requires moving the function, but since it's so
small and the change is trivial, move and plumb it in
the same patch.
Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I69cf020736676d80c6426491865d2eb063e923df
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/453739
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
The RDMA transport was the only one implementing this
function, and it only does a connect - not a disconnect
followed by a connect.
A later patch will add a matching disconnect function.
Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: Ib68eb0ff2f8e59f437d6d8831bb37dfddf83e9a4
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/453929
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
This will help us not iterate through the whole list of connections when
only some of them have pending recvs.
Change-Id: I681bc98befbdda4e77ef333b7a086c08b2708eb3
Signed-off-by: Seth Howell <seth.howell@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/449266
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
This will help save MMIO overhead. Especially in the SRQ case.
Change-Id: I6fb70cf6de4763450f97961f41ccdce3acec2e63
Signed-off-by: Seth Howell <seth.howell@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/449265
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
This will eliminate a lot of unnecessary verbose
messages, especially from cryptodev.
Change-Id: I000adfa524c86f6379ebab4ba2087a8d6fabfe5f
Signed-off-by: paul luse <paul.e.luse@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/454099
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
In prep for next patch where queueing a comp op requires
the poller to call a func that was previously below it.
Change-Id: I0ba8a00e958e0766f866a0cd49d7b288ea4cbe73
Signed-off-by: paul luse <paul.e.luse@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/453029
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
In working on a future patch to queue compress operations, I found
some corruptions in our mbuf pool stemming from an inconsistency
in using mbuf macros when constructing a compress operation and
how we allocated and freed both the pool and the mbufs.
This also fixes an issue that I hadn't addressed yet with freeing
chained mbufs. Use of the mbuf macro to free them instead of the
generic spdk functions takes care of that for us.
Change-Id: I7b29a0d740ab745574698c721d575d8a735ad5cb
Signed-off-by: paul luse <paul.e.luse@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/453028
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Will need this for upcoming compress patches so remove
from its current conditional linking and link for all.
Change-Id: Iba0cf0f529a0765b6d54f7f88eb86e516c5b89ee
Signed-off-by: paul luse <paul.e.luse@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/453026
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
I didn't test delete after making a bunch of channel changes so there
were some bugs in that path. Also as a drive-by I NULL out the
base_desc in vbdev_reduce_load_cb() to be consistent with other places
where I'm closing the base desc.
Change-Id: Iddd5dc704cde8eb7a6a5a3a8481e064a5c6c6d4e
Signed-off-by: paul luse <paul.e.luse@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/452267
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
On init, we pass reducelib the address of our params structure
so that the volume size is updated accordingly. On load however,
there was nothing to set the volume size so any load of a previously
created compress volume would result in a 0 length bdev.
Change-Id: I7643c79fa2e664115fd25df064ff1c74d82e358b
Signed-off-by: paul luse <paul.e.luse@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/452906
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Both for vhost SCSI and iSCSI target, IO channel is allocated to
LUN before using it. Hence LUN is not used by anyone if IO channel
is not allocated to it. So we can call scsi_lun_remove in this
case.
Change-Id: I6881a5e075ed6ef11802e1b166dfb3f35531d100
Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/453968
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
We have observed unexpcted timeout when we remove LUNs from the
active iSCSI target dynamically during FIO workload.
By making destroy_raid_bdev RPC wait for its completion, we could know
the destroy_raid_bdev RPC caused timeout because LUN hot removal didn't
complete.
By investigating the log, incoming I/Os from the host had not stopped
even after hot removal process was started.
The reason was that iSCSI target had continued to accept incoming I/Os
from the host.
By removing LUN from the SCSI device at the start of the LUN hot removal
process, iSCSI target will be able to stop incoming I/Os and LUN hot removal
will complete in finite time.
LUN itself can be accessible even after it is removed from the SCSI device.
LUN hot removal is for not I_T nexus but I_T_L nexus and so we cannot
start connection exiting in this case because connection can have multiple
LUNs. So this fix requires few changes and will be practical.
Fixes#715
Change-Id: I17d7a1f6c6557297289c3bd148a62db46da48ec5
Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/453959
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
