diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/drbd_genl.h | 1 | ||||
| -rw-r--r-- | include/linux/drbd_limits.h | 6 |
2 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/drbd_genl.h b/include/linux/drbd_genl.h index ab649d8e9ed2..c934d3a96b5e 100644 --- a/include/linux/drbd_genl.h +++ b/include/linux/drbd_genl.h @@ -132,6 +132,7 @@ GENL_struct(DRBD_NLA_DISK_CONF, 3, disk_conf, __flg_field_def(18, DRBD_GENLA_F_MANDATORY, disk_drain, DRBD_DISK_DRAIN_DEF) __flg_field_def(19, DRBD_GENLA_F_MANDATORY, md_flushes, DRBD_MD_FLUSHES_DEF) __flg_field_def(23, 0 /* OPTIONAL */, al_updates, DRBD_AL_UPDATES_DEF) + __flg_field_def(24, 0 /* OPTIONAL */, discard_zeroes_if_aligned, DRBD_DISCARD_ZEROES_IF_ALIGNED) ) GENL_struct(DRBD_NLA_RESOURCE_OPTS, 4, res_opts, diff --git a/include/linux/drbd_limits.h b/include/linux/drbd_limits.h index 2e4aad8d8ae8..a351c40087cd 100644 --- a/include/linux/drbd_limits.h +++ b/include/linux/drbd_limits.h @@ -210,6 +210,12 @@ #define DRBD_MD_FLUSHES_DEF 1 #define DRBD_TCP_CORK_DEF 1 #define DRBD_AL_UPDATES_DEF 1 +/* We used to ignore the discard_zeroes_data setting. + * To not change established (and expected) behaviour, + * by default assume that, for discard_zeroes_data=0, + * we can make that an effective discard_zeroes_data=1, + * if we only explicitly zero-out unaligned partial chunks. */ +#define DRBD_DISCARD_ZEROES_IF_ALIGNED 1 #define DRBD_ALLOW_TWO_PRIMARIES_DEF 0 #define DRBD_ALWAYS_ASBP_DEF 0 |