lkml.org 
[lkml]   [2018]   [Sep]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH AUTOSEL 4.14 22/36] md/raid5-cache: disable reshape completely
Date
From: Shaohua Li <shli@fb.com>

[ Upstream commit e254de6bcf3f5b6e78a92ac95fb91acef8adfe1a ]

We don't support reshape yet if an array supports log device. Previously we
determine the fact by checking ->log. However, ->log could be NULL after a log
device is removed, but the array is still marked to support log device. Don't
allow reshape in this case too. User can disable log device support by setting
'consistency_policy' to 'resync' then do reshape.

Reported-by: Xiao Ni <xni@redhat.com>
Tested-by: Xiao Ni <xni@redhat.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
drivers/md/raid5-log.h | 5 +++++
drivers/md/raid5.c | 6 +++---
2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/md/raid5-log.h b/drivers/md/raid5-log.h
index 284578b0a349..5c908c510c77 100644
--- a/drivers/md/raid5-log.h
+++ b/drivers/md/raid5-log.h
@@ -43,6 +43,11 @@ extern void ppl_write_stripe_run(struct r5conf *conf);
extern void ppl_stripe_write_finished(struct stripe_head *sh);
extern int ppl_modify_log(struct r5conf *conf, struct md_rdev *rdev, bool add);

+static inline bool raid5_has_log(struct r5conf *conf)
+{
+ return test_bit(MD_HAS_JOURNAL, &conf->mddev->flags);
+}
+
static inline bool raid5_has_ppl(struct r5conf *conf)
{
return test_bit(MD_HAS_PPL, &conf->mddev->flags);
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 5018fb2352c2..dbf51b4c21b3 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -736,7 +736,7 @@ static bool stripe_can_batch(struct stripe_head *sh)
{
struct r5conf *conf = sh->raid_conf;

- if (conf->log || raid5_has_ppl(conf))
+ if (raid5_has_log(conf) || raid5_has_ppl(conf))
return false;
return test_bit(STRIPE_BATCH_READY, &sh->state) &&
!test_bit(STRIPE_BITMAP_PENDING, &sh->state) &&
@@ -7717,7 +7717,7 @@ static int raid5_resize(struct mddev *mddev, sector_t sectors)
sector_t newsize;
struct r5conf *conf = mddev->private;

- if (conf->log || raid5_has_ppl(conf))
+ if (raid5_has_log(conf) || raid5_has_ppl(conf))
return -EINVAL;
sectors &= ~((sector_t)conf->chunk_sectors - 1);
newsize = raid5_size(mddev, sectors, mddev->raid_disks);
@@ -7768,7 +7768,7 @@ static int check_reshape(struct mddev *mddev)
{
struct r5conf *conf = mddev->private;

- if (conf->log || raid5_has_ppl(conf))
+ if (raid5_has_log(conf) || raid5_has_ppl(conf))
return -EINVAL;
if (mddev->delta_disks == 0 &&
mddev->new_layout == mddev->layout &&
--
2.17.1
\
 
 \ /
  Last update: 2018-09-24 16:58    [W:0.175 / U:0.944 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site