Reserve DMU_BACKUP_FEATURE for ZSTD

Reserve bit 25 for the ZSTD compression feature from FreeBSD.

Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Matthew Ahrens <mahrens@delphix.com>
Signed-off-by: Allan Jude <allanjude@freebsd.org>
Closes #7626

diff --git a/include/sys/zfs_ioctl.h b/include/sys/zfs_ioctl.h
index 06e3cb24a46cdba1bf619071cff4dbc782e66401..317622f7c733e948f7b19efc8f535e94d3bc8cbe 100644 (file)
--- a/include/sys/zfs_ioctl.h
+++ b/include/sys/zfs_ioctl.h
@@ -105,6 +105,7 @@ typedef enum drr_headertype {
 #define        DMU_BACKUP_FEATURE_COMPRESSED           (1 << 22)
 #define        DMU_BACKUP_FEATURE_LARGE_DNODE          (1 << 23)
 #define        DMU_BACKUP_FEATURE_RAW                  (1 << 24)
+/* flag #25 is reserved for the ZSTD compression feature */
 
 /*
  * Mask of all supported backup features