Illumos 5960, 5925

5960 zfs recv should prefetch indirect blocks
5925 zfs receive -o origin=
Reviewed by: Prakash Surya <prakash.surya@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>

References:
  https://www.illumos.org/issues/5960
  https://www.illumos.org/issues/5925
  https://github.com/illumos/illumos-gate/commit/a2cdcdd

Porting notes:
- [lib/libzfs/libzfs_sendrecv.c]
  - b8864a2 Fix gcc cast warnings
  - 325f023 Add linux kernel device support
  - 5c3f61e Increase Linux pipe buffer size on 'zfs receive'
- [module/zfs/zfs_vnops.c]
  - 3558fd7 Prototype/structure update for Linux
  - c12e3a5 Restructure zfs_readdir() to fix regressions
- [module/zfs/zvol.c]
  - Function @zvol_map_block() isn't needed in ZoL
  - 9965059 Prefetch start and end of volumes
- [module/zfs/dmu.c]
  - Fixed ISO C90 - mixed declarations and code
  - Function dmu_prefetch() 'int i' is initialized before
    the following code block (c90 vs. c99)
- [module/zfs/dbuf.c]
  - fc5bb51 Fix stack dbuf_hold_impl()
  - 9b67f60 Illumos 4757, 4913
  - 34229a2 Reduce stack usage for recursive traverse_visitbp()
- [module/zfs/dmu_send.c]
  - Fixed ISO C90 - mixed declarations and code
  - b58986e Use large stacks when available
  - 241b541 Illumos 5959 - clean up per-dataset feature count code
  - 77aef6f Use vmem_alloc() for nvlists
  - 00b4602 Add linux kernel memory support

Ported-by: kernelOfTruth kerneloftruth@gmail.com
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>

cmd/zdb/zdb.c

@@ -2489,6 +2489,9 @@ zdb_blkptr_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
 	dmu_object_type_t type;
 	boolean_t is_metadata;
 
+	if (bp == NULL)
+		return (0);
+
 	if (dump_opt['b'] >= 5 && bp->blk_birth > 0) {
 		char blkbuf[BP_SPRINTF_LEN];
 		snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
@@ -2985,7 +2988,7 @@ zdb_ddt_add_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
 	avl_index_t where;
 	zdb_ddt_entry_t *zdde, zdde_search;
 
-	if (BP_IS_HOLE(bp) || BP_IS_EMBEDDED(bp))
+	if (bp == NULL || BP_IS_HOLE(bp) || BP_IS_EMBEDDED(bp))
 		return (0);
 
 	if (dump_opt['S'] > 1 && zb->zb_level == ZB_ROOT_LEVEL) {

cmd/zfs/zfs_main.c

@@ -249,8 +249,9 @@ get_usage(zfs_help_t idx)
 		return (gettext("\tpromote <clone-filesystem>\n"));
 	case HELP_RECEIVE:
 		return (gettext("\treceive [-vnFu] <filesystem|volume|"
-		"snapshot>\n"
-		"\treceive [-vnFu] [-d | -e] <filesystem>\n"));
+		    "snapshot>\n"
+		    "\treceive [-vnFu] [-o origin=<snapshot>] [-d | -e] "
+		    "<filesystem>\n"));
 	case HELP_RENAME:
 		return (gettext("\trename [-f] <filesystem|volume|snapshot> "
 		    "<filesystem|volume|snapshot>\n"
@@ -793,7 +794,7 @@ zfs_do_create(int argc, char **argv)
 				nomem();
 			break;
 		case 'o':
-			if (parseprop(props, optarg))
+			if (parseprop(props, optarg) != 0)
 				goto error;
 			break;
 		case 's':
@@ -3622,7 +3623,7 @@ zfs_do_snapshot(int argc, char **argv)
 	while ((c = getopt(argc, argv, "ro:")) != -1) {
 		switch (c) {
 		case 'o':
-			if (parseprop(props, optarg))
+			if (parseprop(props, optarg) != 0)
 				return (1);
 			break;
 		case 'r':
@@ -3881,10 +3882,19 @@ zfs_do_receive(int argc, char **argv)
 {
 	int c, err;
 	recvflags_t flags = { 0 };
+	nvlist_t *props;
+	nvpair_t *nvp = NULL;
+
+	if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0)
+		nomem();
 
 	/* check options */
-	while ((c = getopt(argc, argv, ":denuvF")) != -1) {
+	while ((c = getopt(argc, argv, ":o:denuvF")) != -1) {
 		switch (c) {
+		case 'o':
+			if (parseprop(props, optarg) != 0)
+				return (1);
+			break;
 		case 'd':
 			flags.isprefix = B_TRUE;
 			break;
@@ -3929,6 +3939,13 @@ zfs_do_receive(int argc, char **argv)
 		usage(B_FALSE);
 	}
 
+	while ((nvp = nvlist_next_nvpair(props, nvp))) {
+		if (strcmp(nvpair_name(nvp), "origin") != 0) {
+			(void) fprintf(stderr, gettext("invalid option"));
+			usage(B_FALSE);
+		}
+	}
+
 	if (isatty(STDIN_FILENO)) {
 		(void) fprintf(stderr,
 		    gettext("Error: Backup stream can not be read "
@@ -3937,7 +3954,7 @@ zfs_do_receive(int argc, char **argv)
 		return (1);
 	}
 
-	err = zfs_receive(g_zfs, argv[0], &flags, STDIN_FILENO, NULL);
+	err = zfs_receive(g_zfs, argv[0], props, &flags, STDIN_FILENO, NULL);
 
 	return (err != 0);
 }

cmd/ztest/ztest.c

@@ -3728,7 +3728,8 @@ ztest_dmu_read_write(ztest_ds_t *zd, uint64_t id)
 	 */
 	n = ztest_random(regions) * stride + ztest_random(width);
 	s = 1 + ztest_random(2 * width - 1);
-	dmu_prefetch(os, bigobj, n * chunksize, s * chunksize);
+	dmu_prefetch(os, bigobj, 0, n * chunksize, s * chunksize,
+	    ZIO_PRIORITY_SYNC_READ);
 
 	/*
 	 * Pick a random index and compute the offsets into packobj and bigobj.
@@ -5930,8 +5931,10 @@ ztest_run(ztest_shared_t *zs)
 	 * Right before closing the pool, kick off a bunch of async I/O;
 	 * spa_close() should wait for it to complete.
 	 */
-	for (object = 1; object < 50; object++)
-		dmu_prefetch(spa->spa_meta_objset, object, 0, 1ULL << 20);
+	for (object = 1; object < 50; object++) {
+		dmu_prefetch(spa->spa_meta_objset, object, 0, 0, 1ULL << 20,
+		    ZIO_PRIORITY_SYNC_READ);
+	}
 
 	/* Verify that at least one commit cb was called in a timely fashion */
 	if (zc_cb_counter >= ZTEST_COMMIT_CB_MIN_REG)