redonkable/alistair23-linux
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dm zoned: use array for superblock zones

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Instead of storing just the first superblock zone and calculate
the secondary relative to that we should be using an array for
holding the superblock zones.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Bob Liu <bob.liu@oracle.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Hannes Reinecke 2020-05-11 10:24:19 +02:00 committed by Mike Snitzer
parent b712287398
commit 735bd7e4cd
1 changed files with 25 additions and 16 deletions
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41
drivers/md/dm-zoned-metadata.c
View file

@ -124,6 +124,7 @@ struct dmz_sb {
sector_t block;
struct dmz_mblock *mblk;
struct dmz_super *sb;
struct dm_zone *zone;
};
/*
@ -150,7 +151,6 @@ struct dmz_metadata {
/* Zone information array */
struct dm_zone *zones;
struct dm_zone *sb_zone;
struct dmz_sb sb[2];
unsigned int mblk_primary;
u64 sb_gen;
@ -839,8 +839,9 @@ err:
/*
* Check super block.
*/
static int dmz_check_sb(struct dmz_metadata *zmd, struct dmz_super *sb)
static int dmz_check_sb(struct dmz_metadata *zmd, unsigned int set)
{
struct dmz_super *sb = zmd->sb[set].sb;
unsigned int nr_meta_zones, nr_data_zones;
struct dmz_dev *dev = zmd->dev;
u32 crc, stored_crc;
@ -932,16 +933,20 @@ static int dmz_lookup_secondary_sb(struct dmz_metadata *zmd)
/* Bad first super block: search for the second one */
zmd->sb[1].block = zmd->sb[0].block + zone_nr_blocks;
zmd->sb[1].zone = zmd->sb[0].zone + 1;
for (i = 0; i < zmd->nr_rnd_zones - 1; i++) {
if (dmz_read_sb(zmd, 1) != 0)
break;
if (le32_to_cpu(zmd->sb[1].sb->magic) == DMZ_MAGIC)
if (le32_to_cpu(zmd->sb[1].sb->magic) == DMZ_MAGIC) {
zmd->sb[1].zone += i;
return 0;
}
zmd->sb[1].block += zone_nr_blocks;
}
dmz_free_mblock(zmd, mblk);
zmd->sb[1].mblk = NULL;
zmd->sb[1].zone = NULL;
return -EIO;
}
@ -985,11 +990,9 @@ static int dmz_recover_mblocks(struct dmz_metadata *zmd, unsigned int dst_set)
dmz_dev_warn(zmd->dev, "Metadata set %u invalid: recovering", dst_set);
if (dst_set == 0)
zmd->sb[0].block = dmz_start_block(zmd, zmd->sb_zone);
else {
zmd->sb[1].block = zmd->sb[0].block +
(zmd->nr_meta_zones << zmd->dev->zone_nr_blocks_shift);
}
zmd->sb[0].block = dmz_start_block(zmd, zmd->sb[0].zone);
else
zmd->sb[1].block = dmz_start_block(zmd, zmd->sb[1].zone);
page = alloc_page(GFP_NOIO);
if (!page)
@ -1033,21 +1036,27 @@ static int dmz_load_sb(struct dmz_metadata *zmd)
u64 sb_gen[2] = {0, 0};
int ret;
if (!zmd->sb[0].zone) {
dmz_dev_err(zmd->dev, "Primary super block zone not set");
return -ENXIO;
}
/* Read and check the primary super block */
zmd->sb[0].block = dmz_start_block(zmd, zmd->sb_zone);
zmd->sb[0].block = dmz_start_block(zmd, zmd->sb[0].zone);
ret = dmz_get_sb(zmd, 0);
if (ret) {
dmz_dev_err(zmd->dev, "Read primary super block failed");
return ret;
}
ret = dmz_check_sb(zmd, zmd->sb[0].sb);
ret = dmz_check_sb(zmd, 0);
/* Read and check secondary super block */
if (ret == 0) {
sb_good[0] = true;
zmd->sb[1].block = zmd->sb[0].block +
(zmd->nr_meta_zones << zmd->dev->zone_nr_blocks_shift);
if (!zmd->sb[1].zone)
zmd->sb[1].zone = zmd->sb[0].zone + zmd->nr_meta_zones;
zmd->sb[1].block = dmz_start_block(zmd, zmd->sb[1].zone);
ret = dmz_get_sb(zmd, 1);
} else
ret = dmz_lookup_secondary_sb(zmd);
@ -1057,7 +1066,7 @@ static int dmz_load_sb(struct dmz_metadata *zmd)
return ret;
}
ret = dmz_check_sb(zmd, zmd->sb[1].sb);
ret = dmz_check_sb(zmd, 1);
if (ret == 0)
sb_good[1] = true;
@ -1142,9 +1151,9 @@ static int dmz_init_zone(struct blk_zone *blkz, unsigned int idx, void *data)
zmd->nr_useable_zones++;
if (dmz_is_rnd(zone)) {
zmd->nr_rnd_zones++;
if (!zmd->sb_zone) {
if (!zmd->sb[0].zone) {
/* Super block zone */
zmd->sb_zone = zone;
zmd->sb[0].zone = zone;
}
}
}
@ -2415,7 +2424,7 @@ int dmz_ctr_metadata(struct dmz_dev *dev, struct dmz_metadata **metadata)
/* Set metadata zones starting from sb_zone */
for (i = 0; i < zmd->nr_meta_zones << 1; i++) {
zone = dmz_get(zmd, zmd->sb_zone->id + i);
zone = dmz_get(zmd, zmd->sb[0].zone->id + i);
if (!dmz_is_rnd(zone))
goto err;
set_bit(DMZ_META, &zone->flags);