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ocf: split remove_base() function

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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>
This commit is contained in:
Vitaliy Mysak 2019-04-29 17:52:29 +00:00 committed by Darek Stojaczyk
parent b29ec8a261
commit 27ddbb7393
2 changed files with 65 additions and 47 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

110
lib/bdev/ocf/vbdev_ocf.c
View File

@ -155,61 +155,71 @@ get_other_cache_instance(struct vbdev_ocf *vbdev)
return NULL;
}
/* Release SPDK and OCF objects associated with base */
static int
remove_base(struct vbdev_ocf_base *base)
/* Close and unclaim base bdev */
static void
remove_base_bdev(struct vbdev_ocf_base *base)
{
ocf_core_t core;
int rc = 0;
if (base == NULL) {
return -EFAULT;
}
assert(base->attached);
if (base->is_cache && get_other_cache_base(base)) {
if (base->attached) {
spdk_bdev_module_release_bdev(base->bdev);
spdk_bdev_close(base->desc);
base->attached = false;
return 0;
}
/* Release OCF-part */
if (base->parent->ocf_cache && ocf_cache_is_running(base->parent->ocf_cache)) {
if (!base->is_cache) {
rc = ocf_core_get(base->parent->ocf_cache, base->id, &core);
if (rc) {
goto close_spdk_dev;
}
rc = ocf_mngt_cache_lock(base->parent->ocf_cache);
if (rc) {
goto close_spdk_dev;
}
rc = ocf_mngt_cache_remove_core(core);
ocf_mngt_cache_unlock(base->parent->ocf_cache);
}
}
close_spdk_dev:
/* Release SPDK-part */
spdk_bdev_module_release_bdev(base->bdev);
spdk_bdev_close(base->desc);
base->attached = false;
return rc;
}
/* Finish unregister operation */
static void
unregister_finish(struct vbdev_ocf *vbdev)
{
if (vbdev->core.attached) {
remove_base(&vbdev->core);
spdk_bdev_destruct_done(&vbdev->exp_bdev, vbdev->state.stop_status);
vbdev_ocf_mngt_continue(vbdev, 0);
}
static void
close_core_bdev(struct vbdev_ocf *vbdev)
{
remove_base_bdev(&vbdev->core);
vbdev_ocf_mngt_continue(vbdev, 0);
}
/* Detach core base */
static void
detach_core(struct vbdev_ocf *vbdev)
{
int rc;
if (vbdev->ocf_cache && ocf_cache_is_running(vbdev->ocf_cache)) {
rc = ocf_mngt_cache_lock(vbdev->ocf_cache);
if (rc) {
vbdev_ocf_mngt_continue(vbdev, rc);
return;
}
rc = ocf_mngt_cache_remove_core(vbdev->ocf_core);
ocf_mngt_cache_unlock(vbdev->ocf_cache);
vbdev_ocf_mngt_continue(vbdev, rc);
} else {
vbdev_ocf_mngt_continue(vbdev, 0);
}
if (vbdev->cache.attached) {
remove_base(&vbdev->cache);
}
static void
close_cache_bdev(struct vbdev_ocf *vbdev)
{
remove_base_bdev(&vbdev->cache);
vbdev_ocf_mngt_continue(vbdev, 0);
}
/* Detach cache base */
static void
detach_cache(struct vbdev_ocf *vbdev)
{
vbdev->state.stop_status = vbdev->mngt_ctx.status;
/* If some other vbdev references this cache bdev,
* we detach this only by changing the flag, without actual close */
if (get_other_cache_base(&vbdev->cache)) {
vbdev->cache.attached = false;
}
spdk_bdev_destruct_done(&vbdev->exp_bdev, vbdev->mngt_ctx.status);
vbdev_ocf_mngt_continue(vbdev, 0);
}
@ -276,6 +286,10 @@ wait_for_requests(struct vbdev_ocf *vbdev)
vbdev_ocf_mngt_fn unregister_path[] = {
wait_for_requests,
stop_vbdev,
detach_cache,
close_cache_bdev,
detach_core,
close_core_bdev,
unregister_finish,
NULL
};
@ -312,11 +326,13 @@ vbdev_ocf_destruct(void *opaque)
return 1;
}
if (vbdev->core.attached) {
remove_base(&vbdev->core);
}
if (vbdev->cache.attached) {
remove_base(&vbdev->cache);
detach_cache(vbdev);
close_cache_bdev(vbdev);
}
if (vbdev->core.attached) {
detach_core(vbdev);
close_core_bdev(vbdev);
}
return 0;

2
lib/bdev/ocf/vbdev_ocf.h
View File

@ -65,6 +65,8 @@ struct vbdev_ocf_state {
bool doing_reset;
/* From the moment when exp_bdev is registered */
bool started;
/* Status of last attempt for stopping this device */
int stop_status;
};
/*