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OCF: hotremove support

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Add basic handling of base devices hotremove
When either core or caching device gets unregistered,
  the vbdev_ocf does so as well

Change-Id: I05769f714bf22cb320558fed86adc8c3d8a0a185
Signed-off-by: Vitaliy Mysak <vitaliy.mysak@intel.com>
Reviewed-on: https://review.gerrithub.io/c/435729
Chandler-Test-Pool: SPDK Automated Test System <sys_sgsw@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-by: Pawel Wodkowski <pawelx.wodkowski@intel.com>
This commit is contained in:
Vitaliy Mysak 2018-12-01 20:51:25 +00:00 committed by Jim Harris
parent 0487d3a4ee
commit 3ec532e1f7
1 changed files with 19 additions and 1 deletions
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20
lib/bdev/ocf/vbdev_ocf.c
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@ -780,6 +780,24 @@ vbdev_ocf_module_fini(void)
vbdev_ocf_ctx_cleanup();
}
/* When base device gets unpluged this is called
* We will unregister cache vbdev here */
static void
hotremove_cb(void *ctx)
{
struct vbdev_ocf_base *base = ctx;
struct spdk_bdev *bdev = base->bdev;
if (base->parent->state.doing_finish) {
return;
}
SPDK_NOTICELOG("Deinitializing '%s' because its %s device '%s' was removed\n",
base->parent->name, base->is_cache ? "cache" : "core", bdev->name);
vbdev_ocf_delete(base->parent);
}
/* Open base SPDK bdev and claim it */
static int
attach_base(struct vbdev_ocf_base *base)
@ -790,7 +808,7 @@ attach_base(struct vbdev_ocf_base *base)
return -EALREADY;
}
status = spdk_bdev_open(base->bdev, true, NULL, NULL, &base->desc);
status = spdk_bdev_open(base->bdev, true, hotremove_cb, base, &base->desc);
if (status) {
SPDK_ERRLOG("Unable to open device '%s' for writing\n", base->name);
return status;