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Subject[PATCH 10/12] btrfs-progs: mkfs: Zoned block device support
Date
This patch makes the size of the temporary system group chunk equal to the
device zone size. It also enables PREP_DEVICE_HMZONED if the user enables
the HMZONED feature.

Enabling HMZONED feature is done using option "-O hmzoned". This feature is
incompatible for now with source directory setup.

Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
---
mkfs/common.c | 12 +++++++-----
mkfs/common.h | 1 +
mkfs/main.c | 45 +++++++++++++++++++++++++++++++++++++++------
3 files changed, 47 insertions(+), 11 deletions(-)

diff --git a/mkfs/common.c b/mkfs/common.c
index f7e3badcf2b9..12af54c1d886 100644
--- a/mkfs/common.c
+++ b/mkfs/common.c
@@ -152,6 +152,7 @@ int make_btrfs(int fd, struct btrfs_mkfs_config *cfg)
int skinny_metadata = !!(cfg->features &
BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA);
u64 num_bytes;
+ u64 system_group_size;

buf = malloc(sizeof(*buf) + max(cfg->sectorsize, cfg->nodesize));
if (!buf)
@@ -312,12 +313,14 @@ int make_btrfs(int fd, struct btrfs_mkfs_config *cfg)
btrfs_set_item_offset(buf, btrfs_item_nr(nritems), itemoff);
btrfs_set_item_size(buf, btrfs_item_nr(nritems), item_size);

+ system_group_size = (cfg->features & BTRFS_FEATURE_INCOMPAT_HMZONED) ?
+ cfg->zone_size : BTRFS_MKFS_SYSTEM_GROUP_SIZE;
+
dev_item = btrfs_item_ptr(buf, nritems, struct btrfs_dev_item);
btrfs_set_device_id(buf, dev_item, 1);
btrfs_set_device_generation(buf, dev_item, 0);
btrfs_set_device_total_bytes(buf, dev_item, num_bytes);
- btrfs_set_device_bytes_used(buf, dev_item,
- BTRFS_MKFS_SYSTEM_GROUP_SIZE);
+ btrfs_set_device_bytes_used(buf, dev_item, system_group_size);
btrfs_set_device_io_align(buf, dev_item, cfg->sectorsize);
btrfs_set_device_io_width(buf, dev_item, cfg->sectorsize);
btrfs_set_device_sector_size(buf, dev_item, cfg->sectorsize);
@@ -345,7 +348,7 @@ int make_btrfs(int fd, struct btrfs_mkfs_config *cfg)
btrfs_set_item_size(buf, btrfs_item_nr(nritems), item_size);

chunk = btrfs_item_ptr(buf, nritems, struct btrfs_chunk);
- btrfs_set_chunk_length(buf, chunk, BTRFS_MKFS_SYSTEM_GROUP_SIZE);
+ btrfs_set_chunk_length(buf, chunk, system_group_size);
btrfs_set_chunk_owner(buf, chunk, BTRFS_EXTENT_TREE_OBJECTID);
btrfs_set_chunk_stripe_len(buf, chunk, BTRFS_STRIPE_LEN);
btrfs_set_chunk_type(buf, chunk, BTRFS_BLOCK_GROUP_SYSTEM);
@@ -411,8 +414,7 @@ int make_btrfs(int fd, struct btrfs_mkfs_config *cfg)
(unsigned long)btrfs_dev_extent_chunk_tree_uuid(dev_extent),
BTRFS_UUID_SIZE);

- btrfs_set_dev_extent_length(buf, dev_extent,
- BTRFS_MKFS_SYSTEM_GROUP_SIZE);
+ btrfs_set_dev_extent_length(buf, dev_extent, system_group_size);
nritems++;

btrfs_set_header_bytenr(buf, cfg->blocks[MKFS_DEV_TREE]);
diff --git a/mkfs/common.h b/mkfs/common.h
index 28912906d0a9..d0e4c7b2c906 100644
--- a/mkfs/common.h
+++ b/mkfs/common.h
@@ -53,6 +53,7 @@ struct btrfs_mkfs_config {
u64 features;
/* Size of the filesystem in bytes */
u64 num_bytes;
+ u64 zone_size;

/* Output fields, set during creation */

diff --git a/mkfs/main.c b/mkfs/main.c
index 93c0b71c864e..cbfd45bee836 100644
--- a/mkfs/main.c
+++ b/mkfs/main.c
@@ -61,8 +61,12 @@ static int create_metadata_block_groups(struct btrfs_root *root, int mixed,
u64 bytes_used;
u64 chunk_start = 0;
u64 chunk_size = 0;
+ u64 system_group_size = 0;
int ret;

+ system_group_size = fs_info->fs_devices->hmzoned ?
+ fs_info->fs_devices->zone_size : BTRFS_MKFS_SYSTEM_GROUP_SIZE;
+
trans = btrfs_start_transaction(root, 1);
BUG_ON(IS_ERR(trans));
bytes_used = btrfs_super_bytes_used(fs_info->super_copy);
@@ -75,8 +79,8 @@ static int create_metadata_block_groups(struct btrfs_root *root, int mixed,
ret = btrfs_make_block_group(trans, fs_info, bytes_used,
BTRFS_BLOCK_GROUP_SYSTEM,
BTRFS_BLOCK_RESERVED_1M_FOR_SUPER,
- BTRFS_MKFS_SYSTEM_GROUP_SIZE);
- allocation->system += BTRFS_MKFS_SYSTEM_GROUP_SIZE;
+ system_group_size);
+ allocation->system += system_group_size;
if (ret)
return ret;

@@ -761,6 +765,7 @@ int main(int argc, char **argv)
int metadata_profile_opt = 0;
int discard = 1;
int ssd = 0;
+ int hmzoned = 0;
int force_overwrite = 0;
char *source_dir = NULL;
bool source_dir_set = false;
@@ -774,6 +779,7 @@ int main(int argc, char **argv)
u64 features = BTRFS_MKFS_DEFAULT_FEATURES;
struct mkfs_allocation allocation = { 0 };
struct btrfs_mkfs_config mkfs_cfg;
+ u64 system_group_size;

while(1) {
int c;
@@ -896,6 +902,8 @@ int main(int argc, char **argv)
if (dev_cnt == 0)
print_usage(1);

+ hmzoned = features & BTRFS_FEATURE_INCOMPAT_HMZONED;
+
if (source_dir_set && dev_cnt > 1) {
error("the option -r is limited to a single device");
goto error;
@@ -905,6 +913,11 @@ int main(int argc, char **argv)
goto error;
}

+ if (source_dir_set && hmzoned) {
+ error("The -r and hmzoned feature are incompatible\n");
+ exit(1);
+ }
+
if (*fs_uuid) {
uuid_t dummy_uuid;

@@ -936,6 +949,16 @@ int main(int argc, char **argv)

file = argv[optind++];
ssd = is_ssd(file);
+ if (hmzoned) {
+ if (zoned_model(file) == ZONED_NONE) {
+ error("%s: not a zoned block device\n", file);
+ exit(1);
+ }
+ if (!zone_size(file)) {
+ error("%s: zone size undefined\n", file);
+ exit(1);
+ }
+ }

/*
* Set default profiles according to number of added devices.
@@ -1087,7 +1110,8 @@ int main(int argc, char **argv)
ret = btrfs_prepare_device(fd, file, &dev_block_count, block_count,
(zero_end ? PREP_DEVICE_ZERO_END : 0) |
(discard ? PREP_DEVICE_DISCARD : 0) |
- (verbose ? PREP_DEVICE_VERBOSE : 0));
+ (verbose ? PREP_DEVICE_VERBOSE : 0) |
+ (hmzoned ? PREP_DEVICE_HMZONED : 0));
if (ret)
goto error;
if (block_count && block_count > dev_block_count) {
@@ -1098,9 +1122,11 @@ int main(int argc, char **argv)
}

/* To create the first block group and chunk 0 in make_btrfs */
- if (dev_block_count < BTRFS_MKFS_SYSTEM_GROUP_SIZE) {
+ system_group_size = hmzoned ?
+ zone_size(file) : BTRFS_MKFS_SYSTEM_GROUP_SIZE;
+ if (dev_block_count < system_group_size) {
error("device is too small to make filesystem, must be at least %llu",
- (unsigned long long)BTRFS_MKFS_SYSTEM_GROUP_SIZE);
+ (unsigned long long)system_group_size);
goto error;
}

@@ -1116,6 +1142,7 @@ int main(int argc, char **argv)
mkfs_cfg.sectorsize = sectorsize;
mkfs_cfg.stripesize = stripesize;
mkfs_cfg.features = features;
+ mkfs_cfg.zone_size = zone_size(file);

ret = make_btrfs(fd, &mkfs_cfg);
if (ret) {
@@ -1126,6 +1153,7 @@ int main(int argc, char **argv)

fs_info = open_ctree_fs_info(file, 0, 0, 0,
OPEN_CTREE_WRITES | OPEN_CTREE_TEMPORARY_SUPER);
+
if (!fs_info) {
error("open ctree failed");
goto error;
@@ -1199,7 +1227,8 @@ int main(int argc, char **argv)
block_count,
(verbose ? PREP_DEVICE_VERBOSE : 0) |
(zero_end ? PREP_DEVICE_ZERO_END : 0) |
- (discard ? PREP_DEVICE_DISCARD : 0));
+ (discard ? PREP_DEVICE_DISCARD : 0) |
+ (hmzoned ? PREP_DEVICE_HMZONED : 0));
if (ret) {
goto error;
}
@@ -1296,6 +1325,10 @@ raid_groups:
btrfs_group_profile_str(metadata_profile),
pretty_size(allocation.system));
printf("SSD detected: %s\n", ssd ? "yes" : "no");
+ printf("Zoned device: %s\n", hmzoned ? "yes" : "no");
+ if (hmzoned)
+ printf("Zone size: %s\n",
+ pretty_size(fs_info->fs_devices->zone_size));
btrfs_parse_features_to_string(features_buf, features);
printf("Incompat features: %s", features_buf);
printf("\n");
--
2.21.0
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