freebsd-nq/sys/geom
Conrad Meyer bc1ee0be2d gmirror: Evaluate mirror components against newest metadata copy
If we happen to taste a stale mirror component first, don't reject valid,
newer components that have differing metadata from the stale component
(during STARTING).  Instead, update our view of the most recent metadata as
we taste components.

Like mediasize beforehand, remove some checks from g_mirror_check_metadata
which would evict valid components due to metadata that can change over a
mirror's lifetime.  g_mirror_check_metadata is invoked long before we check
genid/syncid and decide which component(s) are newest and whether or not we
have quorum.

Before checking if we can enter RUNNING (i.e., we have quorum) after a NEW
component is added, first remove any known stale or inconsistent disks from
the mirrorset, rather than removing them *after* deciding we have quorum.
Check if we have quorum after removing these components.

Additionally, add a knob, kern.geom.mirror.launch_mirror_before_timeout, to
force gmirrors to wait out the full timeout (kern.geom.mirror.timeout)
before transitioning from STARTING to RUNNING.  This is a kludge to help
ensure all eligible, boot-time available mirror components are tasted before
RUNNING a gmirror.

When we are instructed to forget mirror components, bump the generation id
to avoid confusion with such stale components later.

Add a basic test case for STARTING -> RUNNING startup behavior around stale
genids.

PR:		232671, 232835
Submitted by:	Cindy Yang <cyang AT isilon.com> (previous version)
Reviewed by:	markj (kernel portions)
Discussed with:	asomers, Cindy Yang
Tested by:	pho
Sponsored by:	Dell EMC Isilon
Differential Revision:	https://reviews.freebsd.org/D18062
2018-12-06 23:55:39 +00:00
..
bde Annotate geom modules with MODULE_VERSION 2018-04-10 19:18:16 +00:00
cache Annotate geom modules with MODULE_VERSION 2018-04-10 19:18:16 +00:00
concat Have gconcat advertise delete support if one of its disks does. 2018-10-30 00:22:14 +00:00
eli Restore backward compatibility for "attach" verb. 2018-10-27 03:37:14 +00:00
gate geom_gate: enable resize 2018-07-13 07:08:06 +00:00
journal Normally when an attempt is made to mount a UFS/FFS filesystem whose 2018-12-06 00:09:39 +00:00
label Normally when an attempt is made to mount a UFS/FFS filesystem whose 2018-12-06 00:09:39 +00:00
linux_lvm Annotate geom modules with MODULE_VERSION 2018-04-10 19:18:16 +00:00
mirror gmirror: Evaluate mirror components against newest metadata copy 2018-12-06 23:55:39 +00:00
mountver Annotate geom modules with MODULE_VERSION 2018-04-10 19:18:16 +00:00
multipath Annotate geom modules with MODULE_VERSION 2018-04-10 19:18:16 +00:00
nop Extend stripeoffset and stripesize of GEOMs from u_int to off_t 2018-10-27 16:14:42 +00:00
part Add a “skip_dsn” option to g_part's bootcode verb to prevent g_part_mbr 2018-11-27 14:58:19 +00:00
raid Extend stripeoffset and stripesize of GEOMs from u_int to off_t 2018-10-27 16:14:42 +00:00
raid3 Annotate geom modules with MODULE_VERSION 2018-04-10 19:18:16 +00:00
sched sys/geom: adoption of SPDX licensing ID tags. 2017-11-27 15:17:37 +00:00
shsec Annotate geom modules with MODULE_VERSION 2018-04-10 19:18:16 +00:00
stripe Extend stripeoffset and stripesize of GEOMs from u_int to off_t 2018-10-27 16:14:42 +00:00
uzip Extend stripeoffset and stripesize of GEOMs from u_int to off_t 2018-10-27 16:14:42 +00:00
vinum Annotate geom modules with MODULE_VERSION 2018-04-10 19:18:16 +00:00
virstor Annotate geom modules with MODULE_VERSION 2018-04-10 19:18:16 +00:00
zero Annotate geom modules with MODULE_VERSION 2018-04-10 19:18:16 +00:00
geom_bsd_enc.c sys/geom: adoption of SPDX licensing ID tags. 2017-11-27 15:17:37 +00:00
geom_bsd.c Annotate geom modules with MODULE_VERSION 2018-04-10 19:18:16 +00:00
geom_ccd.c Annotate geom modules with MODULE_VERSION 2018-04-10 19:18:16 +00:00
geom_ctl.c sys/geom: adoption of SPDX licensing ID tags. 2017-11-27 15:17:37 +00:00
geom_ctl.h sys/geom: adoption of SPDX licensing ID tags. 2017-11-27 15:17:37 +00:00
geom_dev.c Another attempt to fix issue with the DIOCGDELETE ioctl(2) not 2018-12-04 21:48:56 +00:00
geom_disk.c geom_disk / scsi_da: deny opening write-protected disks for writing 2018-01-15 11:20:00 +00:00
geom_disk.h Extend stripeoffset and stripesize of GEOMs from u_int to off_t 2018-10-27 16:14:42 +00:00
geom_dump.c Extend stripeoffset and stripesize of GEOMs from u_int to off_t 2018-10-27 16:14:42 +00:00
geom_event.c Instrument "boot holds" for the benefit of the TSLOG framework. These 2017-12-31 09:23:52 +00:00
geom_flashmap.c sys/geom: adoption of SPDX licensing ID tags. 2017-11-27 15:17:37 +00:00
geom_fox.c Annotate geom modules with MODULE_VERSION 2018-04-10 19:18:16 +00:00
geom_int.h sys/geom: adoption of SPDX licensing ID tags. 2017-11-27 15:17:37 +00:00
geom_io.c Revert r340187, it breaks EOD (end-of-device) detection logic. Turns out, 2018-11-07 16:28:09 +00:00
geom_kern.c sys/geom: adoption of SPDX licensing ID tags. 2017-11-27 15:17:37 +00:00
geom_map.c Annotate geom modules with MODULE_VERSION 2018-04-10 19:18:16 +00:00
geom_mbr_enc.c sys/geom: adoption of SPDX licensing ID tags. 2017-11-27 15:17:37 +00:00
geom_mbr.c Annotate geom modules with MODULE_VERSION 2018-04-10 19:18:16 +00:00
geom_redboot.c Extend stripeoffset and stripesize of GEOMs from u_int to off_t 2018-10-27 16:14:42 +00:00
geom_slice.c sys/geom: adoption of SPDX licensing ID tags. 2017-11-27 15:17:37 +00:00
geom_slice.h sys/geom: adoption of SPDX licensing ID tags. 2017-11-27 15:17:37 +00:00
geom_subr.c Extend stripeoffset and stripesize of GEOMs from u_int to off_t 2018-10-27 16:14:42 +00:00
geom_sunlabel_enc.c sys/geom: adoption of SPDX licensing ID tags. 2017-11-27 15:17:37 +00:00
geom_sunlabel.c Annotate geom modules with MODULE_VERSION 2018-04-10 19:18:16 +00:00
geom_vfs.c sys/geom: adoption of SPDX licensing ID tags. 2017-11-27 15:17:37 +00:00
geom_vfs.h sys/geom: adoption of SPDX licensing ID tags. 2017-11-27 15:17:37 +00:00
geom_vol_ffs.c Annotate geom modules with MODULE_VERSION 2018-04-10 19:18:16 +00:00
geom.h Extend stripeoffset and stripesize of GEOMs from u_int to off_t 2018-10-27 16:14:42 +00:00
notes