From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hannes Reinecke Subject: [PATCH 3/4] dm-zoned: V2 metadata handling Date: Fri, 27 Mar 2020 08:14:58 +0100 Message-ID: <20200327071459.67796-4-hare@suse.de> References: <20200327071459.67796-1-hare@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20200327071459.67796-1-hare@suse.de> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: Mike Snitzer Cc: Damien LeMoal , Bob Liu , dm-devel@redhat.com List-Id: dm-devel.ids Add 'V2' metadata which includes UUIDs for the dmz set and for the device itself. Signed-off-by: Hannes Reinecke --- drivers/md/dm-zoned-metadata.c | 80 +++++++++++++++++++++++++++++++++--------- drivers/md/dm-zoned-target.c | 2 +- 2 files changed, 64 insertions(+), 18 deletions(-) diff --git a/drivers/md/dm-zoned-metadata.c b/drivers/md/dm-zoned-metadata.c index dc1d17bc3bbb..026f285fba33 100644 --- a/drivers/md/dm-zoned-metadata.c +++ b/drivers/md/dm-zoned-metadata.c @@ -16,7 +16,8 @@ /* * Metadata version. */ -#define DMZ_META_VER 1 +#define DMZ_META_COMPAT_VER 1 +#define DMZ_META_VER 2 /* * On-disk super block magic. @@ -69,8 +70,17 @@ struct dmz_super { /* Checksum */ __le32 crc; /* 48 */ - /* Padding to full 512B sector */ - u8 reserved[464]; /* 512 */ + /* DM-Zoned label */ + u8 dmz_label[32]; /* 80 */ + + /* DM-Zoned UUID */ + u8 dmz_uuid[16]; /* 96 */ + + /* Device UUID */ + u8 dev_uuid[16]; /* 112 */ + + /* Padding to full 512B - CRC sector */ + u8 reserved[400]; /* 512 */ }; /* @@ -133,6 +143,10 @@ struct dmz_sb { struct dmz_metadata { struct dmz_dev *dev; + char dmz_label[BDEVNAME_SIZE]; + uuid_t dmz_uuid; + uuid_t dev_uuid; + sector_t zone_bitmap_size; unsigned int zone_nr_bitmap_blocks; unsigned int zone_bits_per_mblk; @@ -659,7 +673,14 @@ static int dmz_write_sb(struct dmz_metadata *zmd, unsigned int set) int ret; sb->magic = cpu_to_le32(DMZ_MAGIC); - sb->version = cpu_to_le32(DMZ_META_VER); + + if (!uuid_is_null(&zmd->dmz_uuid)) { + sb->version = cpu_to_le32(DMZ_META_VER); + uuid_copy((uuid_t *)sb->dmz_uuid, &zmd->dmz_uuid); + memcpy(sb->dmz_label, zmd->dmz_label, BDEVNAME_SIZE); + uuid_copy((uuid_t *)sb->dev_uuid, &zmd->dev_uuid); + } else + sb->version = cpu_to_le32(DMZ_META_COMPAT_VER); sb->gen = cpu_to_le64(sb_gen); @@ -848,28 +869,29 @@ static int dmz_check_sb(struct dmz_metadata *zmd, struct dmz_super *sb) { unsigned int nr_meta_zones, nr_data_zones; struct dmz_dev *dev = zmd->dev; - u32 crc, stored_crc; + u32 crc, stored_crc, dmz_version; u64 gen; - gen = le64_to_cpu(sb->gen); - stored_crc = le32_to_cpu(sb->crc); - sb->crc = 0; - crc = crc32_le(gen, (unsigned char *)sb, DMZ_BLOCK_SIZE); - if (crc != stored_crc) { - dmz_dev_err(dev, "Invalid checksum (needed 0x%08x, got 0x%08x)", - crc, stored_crc); - return -ENXIO; - } - if (le32_to_cpu(sb->magic) != DMZ_MAGIC) { dmz_dev_err(dev, "Invalid meta magic (needed 0x%08x, got 0x%08x)", DMZ_MAGIC, le32_to_cpu(sb->magic)); return -ENXIO; } - if (le32_to_cpu(sb->version) != DMZ_META_VER) { + dmz_version = le32_to_cpu(sb->version); + if (dmz_version > DMZ_META_VER) { dmz_dev_err(dev, "Invalid meta version (needed %d, got %d)", - DMZ_META_VER, le32_to_cpu(sb->version)); + DMZ_META_VER, dmz_version); + return -ENXIO; + } + + gen = le64_to_cpu(sb->gen); + stored_crc = le32_to_cpu(sb->crc); + sb->crc = 0; + crc = crc32_le(gen, (unsigned char *)sb, DMZ_BLOCK_SIZE); + if (crc != stored_crc) { + dmz_dev_err(dev, "Invalid checksum (needed 0x%08x, got 0x%08x)", + crc, stored_crc); return -ENXIO; } @@ -895,6 +917,21 @@ static int dmz_check_sb(struct dmz_metadata *zmd, struct dmz_super *sb) return -ENXIO; } + if (dmz_version == DMZ_META_VER) { + if (uuid_is_null((uuid_t *)sb->dmz_uuid)) { + dmz_dev_err(dev, "NULL DM-Zoned uuid"); + return -ENXIO; + } + uuid_copy(&zmd->dmz_uuid, (uuid_t *)sb->dmz_uuid); + memcpy(zmd->dmz_label, sb->dmz_label, BDEVNAME_SIZE); + if (uuid_is_null((uuid_t *)sb->dev_uuid)) { + dmz_dev_err(dev, "NULL device uuid"); + return -ENXIO; + } + uuid_copy(&zmd->dev_uuid, (uuid_t *)sb->dev_uuid); + + } + /* OK */ zmd->nr_meta_blocks = le32_to_cpu(sb->nr_meta_blocks); zmd->nr_reserved_seq = le32_to_cpu(sb->nr_reserved_seq); @@ -2460,9 +2497,18 @@ int dmz_ctr_metadata(struct dmz_dev *dev, struct dmz_metadata **metadata) goto err; } + dmz_dev_info(dev, "DM-Zoned version %d", + uuid_is_null(&zmd->dmz_uuid) ? + DMZ_META_COMPAT_VER : DMZ_META_VER); + if (!uuid_is_null(&zmd->dmz_uuid)) + dmz_dev_info(dev, "DM UUID %pUl", &zmd->dmz_uuid); + if (strlen(zmd->dmz_label)) + dmz_dev_info(dev, "DM Label %s", zmd->dmz_label); dmz_dev_info(dev, "Host-%s zoned block device", bdev_zoned_model(dev->bdev) == BLK_ZONED_HA ? "aware" : "managed"); + if (!uuid_is_null(&zmd->dev_uuid)) + dmz_dev_info(dev, " uuid %pUl", &zmd->dev_uuid); dmz_dev_info(dev, " %llu 512-byte logical sectors", (u64)dev->capacity); dmz_dev_info(dev, " %u zones of %llu 512-byte logical sectors", diff --git a/drivers/md/dm-zoned-target.c b/drivers/md/dm-zoned-target.c index 44e30a7de8b9..7ec9dde24516 100644 --- a/drivers/md/dm-zoned-target.c +++ b/drivers/md/dm-zoned-target.c @@ -1008,7 +1008,7 @@ static int dmz_message(struct dm_target *ti, unsigned int argc, char **argv, static struct target_type dmz_type = { .name = "zoned", - .version = {1, 1, 0}, + .version = {1, 2, 0}, .features = DM_TARGET_SINGLETON | DM_TARGET_ZONED_HM, .module = THIS_MODULE, .ctr = dmz_ctr, -- 2.16.4