chore: unwritten block check from current blob during read (#42)

Signed-off-by: Hrudaya <[email protected]>
openebs · Apr 19, 2024 · 38ea349 · 38ea349
1 parent 0c2995e
commit 38ea349
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diff --git a/include/spdk/nvme_spec.h b/include/spdk/nvme_spec.h
@@ -4355,6 +4355,9 @@ SPDK_STATIC_ASSERT(sizeof(struct spdk_nvme_ns_streams_status) == 131072, "Incorr
 /** When set, reading of unwritten or deallocated block of a thin-provisioned device will fail
  * with SPDK_NVME_SC_DEALLOCATED_OR_UNWRITTEN_BLOCK */
 #define SPDK_NVME_IO_FLAGS_UNWRITTEN_READ_FAIL (4U << 20)
+/** When set, check for allocated blocks from current blob, rather checking from
+ * complete blob chain while doing read */
+#define SPDK_NVME_IO_FLAG_CURRENT_UNWRITTEN_READ_FAIL (4U << 19)
 /** Zone append specific, determines the contents of the reference tag written to the media */
 #define SPDK_NVME_IO_FLAGS_ZONE_APPEND_PIREMAP (1U << 25)
 /** Enable protection information checking of the Logical Block Reference Tag field */

diff --git a/lib/blob/blobstore.c b/lib/blob/blobstore.c
@@ -3322,6 +3322,10 @@ blob_request_submit_rw_iov(struct spdk_blob *blob, struct spdk_io_channel *_chan
 		if (read) {
 			spdk_bs_sequence_t *seq;
 
+			if (!is_allocated && (ext_io_flags & SPDK_NVME_IO_FLAG_CURRENT_UNWRITTEN_READ_FAIL)) {
+				cb_fn(cb_arg, -ETXTBSY);
+				return;
+			}
 			if (!is_allocated && (ext_io_flags & SPDK_NVME_IO_FLAGS_UNWRITTEN_READ_FAIL)) {
 				is_allocated = blob_ancestor_calc_lba_and_lba_count(blob, offset, length, &lba, &lba_count);
 				if (!is_allocated) {