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md/raid1: support read error check

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After commit 1e50915fe0 ("raid: improve MD/raid10 handling of correctable
read errors."), rdev will be set to faulty if it reads data error to many
times in raid10. Add this mechanism to raid1 now.

Signed-off-by: Li Nan <linan122@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20231215023852.3478228-3-linan666@huaweicloud.com
This commit is contained in:
Li Nan 2023-12-15 10:38:52 +08:00 committed by Song Liu
parent 1979dbbe32
commit ca294b34aa
1 changed files with 12 additions and 5 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

17
drivers/md/raid1.c
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@ -2256,16 +2256,24 @@ static void sync_request_write(struct mddev *mddev, struct r1bio *r1_bio)
* 3. Performs writes following reads for array synchronising.
*/
static void fix_read_error(struct r1conf *conf, int read_disk,
sector_t sect, int sectors)
static void fix_read_error(struct r1conf *conf, struct r1bio *r1_bio)
{
sector_t sect = r1_bio->sector;
int sectors = r1_bio->sectors;
int read_disk = r1_bio->read_disk;
struct mddev *mddev = conf->mddev;
struct md_rdev *rdev = rcu_dereference(conf->mirrors[read_disk].rdev);
if (exceed_read_errors(mddev, rdev)) {
r1_bio->bios[r1_bio->read_disk] = IO_BLOCKED;
return;
}
while(sectors) {
int s = sectors;
int d = read_disk;
int success = 0;
int start;
struct md_rdev *rdev;
if (s > (PAGE_SIZE>>9))
s = PAGE_SIZE >> 9;
@ -2506,8 +2514,7 @@ static void handle_read_error(struct r1conf *conf, struct r1bio *r1_bio)
if (mddev->ro == 0
&& !test_bit(FailFast, &rdev->flags)) {
freeze_array(conf, 1);
fix_read_error(conf, r1_bio->read_disk,
r1_bio->sector, r1_bio->sectors);
fix_read_error(conf, r1_bio);
unfreeze_array(conf);
} else if (mddev->ro == 0 && test_bit(FailFast, &rdev->flags)) {
md_error(mddev, rdev);