From 2e158b0e0b0bc0375b85a7db64e6f3213f0a6dc0 Mon Sep 17 00:00:00 2001
From: Rich Ercolani <214141+rincebrain@users.noreply.github.com>
Date: Wed, 9 Jun 2021 20:57:57 -0400
Subject: Added error for writing to /dev/ on Linux
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Starting in Linux 5.10, trying to write to /dev/{null,zero} errors out.
Prefer to inform people when this happens rather than hoping they guess
what's wrong.

Reviewed-by: Antonio Russo <aerusso@aerusso.net>
Reviewed-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: John Kennedy <john.kennedy@delphix.com>
Signed-off-by: Rich Ercolani <rincebrain@gmail.com>
Closes:  #11991
---
 lib/libzfs/libzfs_sendrecv.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'lib/libzfs')

diff --git a/lib/libzfs/libzfs_sendrecv.c b/lib/libzfs/libzfs_sendrecv.c
index 8b732bb22..410c34888 100644
--- a/lib/libzfs/libzfs_sendrecv.c
+++ b/lib/libzfs/libzfs_sendrecv.c
@@ -849,6 +849,7 @@ dump_ioctl(zfs_handle_t *zhp, const char *fromsnap, uint64_t fromsnap_obj,
 		case ERANGE:
 		case EFAULT:
 		case EROFS:
+		case EINVAL:
 			zfs_error_aux(hdl, "%s", strerror(errno));
 			return (zfs_error(hdl, EZFS_BADBACKUP, errbuf));
 
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