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blobstore: Add _spdk_bs_is_blob_deletable function

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This patch adds new function which is used to check
if blob can be removed when requested.

Signed-off-by: Maciej Szwed <maciej.szwed@intel.com>
Change-Id: Iafa82fba9bf67ffd15cf639f4665087f054b6b7d
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/452242
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
This commit is contained in:
Maciej Szwed 2019-04-26 17:46:58 +02:00 committed by Jim Harris
parent 8a9c101446
commit 5fb0e244ed
1 changed files with 27 additions and 18 deletions
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45
lib/blob/blobstore.c
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@ -5055,6 +5055,29 @@ _spdk_bs_delete_persist_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
spdk_blob_close(blob, _spdk_bs_delete_close_cpl, seq);
}
static int
_spdk_bs_is_blob_deletable(struct spdk_blob *blob)
{
struct spdk_blob_list *snapshot_entry = NULL;
if (blob->open_ref > 1) {
/* Someone has this blob open (besides this delete context). */
return -EBUSY;
}
/* Check if this is a snapshot with clones */
snapshot_entry = _spdk_bs_get_snapshot_entry(blob->bs, blob->id);
if (snapshot_entry != NULL) {
/* If snapshot have clones, we cannot remove it */
if (!TAILQ_EMPTY(&snapshot_entry->clones)) {
SPDK_ERRLOG("Cannot remove snapshot with clones\n");
return -EBUSY;
}
}
return 0;
}
static void
_spdk_bs_delete_open_cpl(void *cb_arg, struct spdk_blob *blob, int bserrno)
{
@ -5069,27 +5092,12 @@ _spdk_bs_delete_open_cpl(void *cb_arg, struct spdk_blob *blob, int bserrno)
_spdk_blob_verify_md_op(blob);
if (blob->open_ref > 1) {
/*
* Someone has this blob open (besides this delete context).
* Decrement the ref count directly and return -EBUSY.
*/
blob->open_ref--;
spdk_bs_sequence_finish(seq, -EBUSY);
bserrno = _spdk_bs_is_blob_deletable(blob);
if (bserrno) {
spdk_blob_close(blob, _spdk_bs_delete_ebusy_close_cpl, seq);
return;
}
/* Check if this is a snapshot with clones */
snapshot = _spdk_bs_get_snapshot_entry(blob->bs, blob->id);
if (snapshot != NULL) {
/* If snapshot have clones, we cannot remove it */
if (!TAILQ_EMPTY(&snapshot->clones)) {
SPDK_ERRLOG("Cannot remove snapshot with clones\n");
spdk_blob_close(blob, _spdk_bs_delete_ebusy_close_cpl, seq);
return;
}
}
_spdk_bs_blob_list_remove(blob);
if (blob->locked_operation_in_progress) {
@ -5107,6 +5115,7 @@ _spdk_bs_delete_open_cpl(void *cb_arg, struct spdk_blob *blob, int bserrno)
TAILQ_REMOVE(&blob->bs->blobs, blob, link);
/* If blob is a snapshot then remove it from the list */
snapshot = _spdk_bs_get_snapshot_entry(blob->bs, blob->id);
if (snapshot != NULL) {
TAILQ_REMOVE(&blob->bs->snapshots, snapshot, link);
free(snapshot);