Illumos 5813 - zfs_setprop_error(): Handle errno value E2BIG.

5813 zfs_setprop_error(): Handle errno value E2BIG.
Reviewed by: Paul Dagnelie <paul.dagnelie@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Prakash Surya <prakash.surya@delphix.com>
Reviewed by: Richard Elling <richard.elling@richardelling.com>
Approved by: Garrett D'Amore <garrett@damore.org>

References:
  illumos/illumos-gate@6fdcb3d
  https://www.illumos.org/issues/5813

Ported-by: kernelOfTruth kerneloftruth@gmail.com
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #3572

Author: wca

lib/libzfs/libzfs_dataset.c

@@ -1445,6 +1445,12 @@ zfs_setprop_error(libzfs_handle_t *hdl, zfs_prop_t prop, int err,
 		(void) zfs_error(hdl, EZFS_DSREADONLY, errbuf);
 		break;
 
+	case E2BIG:
+		zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
+		    "property value too long"));
+		(void) zfs_error(hdl, EZFS_BADPROP, errbuf);
+		break;
+
 	case ENOTSUP:
 		zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 		    "pool and or dataset must be upgraded to set this "