ZIL: Do not encrypt block pointers in lr_clone_range_t

In case of crash cloned blocks need to be claimed on pool import. It is only possible if they (lr_bps) and their count (lr_nbps) are not encrypted but only authenticated, similar to block pointer in lr_write_t. Few other fields can be and are still encrypted. This should fix panic on ZIL claim after crash when block cloning is actively used. Signed-off-by: Alexander Motin <[email protected]> Sponsored by: iXsystems, Inc.
openzfs · Nov 22, 2023 · 3029346 · 3029346
1 parent a94860a
commit 3029346
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Showing 2 changed files with 38 additions and 20 deletions.
diff --git a/module/os/freebsd/zfs/zio_crypt.c b/module/os/freebsd/zfs/zio_crypt.c
@@ -1338,19 +1338,14 @@ zio_crypt_init_uios_zil(boolean_t encrypt, uint8_t *plainbuf,
 		 * authenticate it.
 		 */
 		if (txtype == TX_WRITE) {
-			crypt_len = sizeof (lr_write_t) -
-			    sizeof (lr_t) - sizeof (blkptr_t);
-			dst_iovecs[vec].iov_base = (char *)dlrp +
-			    sizeof (lr_t);
+			const size_t o = offsetof(lr_write_t, lr_blkptr);
+			crypt_len = o - sizeof (lr_t);
+			dst_iovecs[vec].iov_base = (char *)dlrp + sizeof (lr_t);
 			dst_iovecs[vec].iov_len = crypt_len;
 
 			/* copy the bp now since it will not be encrypted */
-			memcpy(dlrp + sizeof (lr_write_t) - sizeof (blkptr_t),
-			    slrp + sizeof (lr_write_t) - sizeof (blkptr_t),
-			    sizeof (blkptr_t));
-			memcpy(aadp,
-			    slrp + sizeof (lr_write_t) - sizeof (blkptr_t),
-			    sizeof (blkptr_t));
+			memcpy(dlrp + o, slrp + o, sizeof (blkptr_t));
+			memcpy(aadp, slrp + o, sizeof (blkptr_t));
 			aadp += sizeof (blkptr_t);
 			aad_len += sizeof (blkptr_t);
 			vec++;
@@ -1364,10 +1359,22 @@ zio_crypt_init_uios_zil(boolean_t encrypt, uint8_t *plainbuf,
 				vec++;
 				total_len += crypt_len;
 			}
+		} else if (txtype == TX_CLONE_RANGE) {
+			const size_t o = offsetof(lr_clone_range_t, lr_nbps);
+			crypt_len = o - sizeof (lr_t);
+			dst_iovecs[vec].iov_base = (char *)dlrp + sizeof (lr_t);
+			dst_iovecs[vec].iov_len = crypt_len;
+
+			/* copy the bps now since they will not be encrypted */
+			memcpy(dlrp + o, slrp + o, lr_len - o);
+			memcpy(aadp, slrp + o, lr_len - o);
+			aadp += lr_len - o;
+			aad_len += lr_len - o;
+			vec++;
+			total_len += crypt_len;
 		} else {
 			crypt_len = lr_len - sizeof (lr_t);
-			dst_iovecs[vec].iov_base = (char *)dlrp +
-			    sizeof (lr_t);
+			dst_iovecs[vec].iov_base = (char *)dlrp + sizeof (lr_t);
 			dst_iovecs[vec].iov_len = crypt_len;
 			vec++;
 			total_len += crypt_len;

diff --git a/module/os/linux/zfs/zio_crypt.c b/module/os/linux/zfs/zio_crypt.c
@@ -1513,20 +1513,16 @@ zio_crypt_init_uios_zil(boolean_t encrypt, uint8_t *plainbuf,
 		 * authenticate it.
 		 */
 		if (txtype == TX_WRITE) {
-			crypt_len = sizeof (lr_write_t) -
-			    sizeof (lr_t) - sizeof (blkptr_t);
+			const size_t o = offsetof(lr_write_t, lr_blkptr);
+			crypt_len = o - sizeof (lr_t);
 			src_iovecs[nr_iovecs].iov_base = slrp + sizeof (lr_t);
 			src_iovecs[nr_iovecs].iov_len = crypt_len;
 			dst_iovecs[nr_iovecs].iov_base = dlrp + sizeof (lr_t);
 			dst_iovecs[nr_iovecs].iov_len = crypt_len;
 
 			/* copy the bp now since it will not be encrypted */
-			memcpy(dlrp + sizeof (lr_write_t) - sizeof (blkptr_t),
-			    slrp + sizeof (lr_write_t) - sizeof (blkptr_t),
-			    sizeof (blkptr_t));
-			memcpy(aadp,
-			    slrp + sizeof (lr_write_t) - sizeof (blkptr_t),
-			    sizeof (blkptr_t));
+			memcpy(dlrp + o, slrp + o, sizeof (blkptr_t));
+			memcpy(aadp, slrp + o, sizeof (blkptr_t));
 			aadp += sizeof (blkptr_t);
 			aad_len += sizeof (blkptr_t);
 			nr_iovecs++;
@@ -1543,6 +1539,21 @@ zio_crypt_init_uios_zil(boolean_t encrypt, uint8_t *plainbuf,
 				nr_iovecs++;
 				total_len += crypt_len;
 			}
+		} else if (txtype == TX_CLONE_RANGE) {
+			const size_t o = offsetof(lr_clone_range_t, lr_nbps);
+			crypt_len = o - sizeof (lr_t);
+			src_iovecs[nr_iovecs].iov_base = slrp + sizeof (lr_t);
+			src_iovecs[nr_iovecs].iov_len = crypt_len;
+			dst_iovecs[nr_iovecs].iov_base = dlrp + sizeof (lr_t);
+			dst_iovecs[nr_iovecs].iov_len = crypt_len;
+
+			/* copy the bps now since they will not be encrypted */
+			memcpy(dlrp + o, slrp + o, lr_len - o);
+			memcpy(aadp, slrp + o, lr_len - o);
+			aadp += lr_len - o;
+			aad_len += lr_len - o;
+			nr_iovecs++;
+			total_len += crypt_len;
 		} else {
 			crypt_len = lr_len - sizeof (lr_t);
 			src_iovecs[nr_iovecs].iov_base = slrp + sizeof (lr_t);