Btrfs-progs: mkfs can now create fs with skinny extents

Before this change, passing -O skinny-metadata to mkfs.btrfs would
only set the skinny metadata incompat flag in the super block after
the filesystem was created. This change makes mkfs.btrfs directly
create a filesystem with only skinny extents for metadata.

Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
master
Filipe David Borba Manana 2013-08-17 14:48:29 +01:00 committed by David Sterba
parent da10563d8b
commit d608d404c3
4 changed files with 36 additions and 31 deletions

View File

@ -2319,7 +2319,7 @@ static int do_convert(const char *devname, int datacsum, int packing,
}
ret = make_btrfs(fd, devname, ext2_fs->super->s_volume_name,
blocks, total_bytes, blocksize, blocksize,
blocksize, blocksize);
blocksize, blocksize, 0);
if (ret) {
fprintf(stderr, "unable to create initial ctree: %s\n",
strerror(-ret));

37
mkfs.c
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@ -1352,8 +1352,6 @@ int main(int ac, char **av)
u64 num_of_meta_chunks = 0;
u64 size_of_data = 0;
u64 source_dir_size = 0;
struct btrfs_super_block *super;
u64 flags;
int dev_cnt = 0;
int saved_optind;
char estr[100];
@ -1526,9 +1524,23 @@ int main(int ac, char **av)
leafsize * i;
}
/*
* FS features that can be set by other means than -O
* just set the bit here
*/
if (mixed)
features |= BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS;
if ((data_profile | metadata_profile) &
(BTRFS_BLOCK_GROUP_RAID5 | BTRFS_BLOCK_GROUP_RAID6)) {
features |= BTRFS_FEATURE_INCOMPAT_RAID56;
}
process_fs_features(features);
ret = make_btrfs(fd, file, label, blocks, dev_block_count,
nodesize, leafsize,
sectorsize, stripesize);
sectorsize, stripesize, features);
if (ret) {
fprintf(stderr, "error during mkfs: %s\n", strerror(-ret));
exit(1);
@ -1602,25 +1614,6 @@ raid_groups:
ret = create_data_reloc_tree(trans, root);
BUG_ON(ret);
super = root->fs_info->super_copy;
flags = btrfs_super_incompat_flags(super);
/*
* FS features that can be set by other means than -O
* just set the bit here
*/
if (mixed)
features |= BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS;
if ((data_profile | metadata_profile) &
(BTRFS_BLOCK_GROUP_RAID5 | BTRFS_BLOCK_GROUP_RAID6)) {
features |= BTRFS_FEATURE_INCOMPAT_RAID56;
}
process_fs_features(features);
flags |= features;
btrfs_set_super_incompat_flags(super, flags);
printf("fs created label %s on %s\n\tnodesize %u leafsize %u "
"sectorsize %u size %s\n",
label, first_file, nodesize, leafsize, sectorsize,

26
utils.c
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@ -73,7 +73,7 @@ static u64 reference_root_table[] = {
int make_btrfs(int fd, const char *device, const char *label,
u64 blocks[7], u64 num_bytes, u32 nodesize,
u32 leafsize, u32 sectorsize, u32 stripesize)
u32 leafsize, u32 sectorsize, u32 stripesize, u64 features)
{
struct btrfs_super_block super;
struct extent_buffer *buf;
@ -94,6 +94,8 @@ int make_btrfs(int fd, const char *device, const char *label,
u64 ref_root;
u32 array_size;
u32 item_size;
int skinny_metadata = !!(features &
BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA);
first_free = BTRFS_SUPER_INFO_OFFSET + sectorsize * 2 - 1;
first_free &= ~((u64)sectorsize - 1);
@ -120,6 +122,7 @@ int make_btrfs(int fd, const char *device, const char *label,
btrfs_set_super_csum_type(&super, BTRFS_CSUM_TYPE_CRC32);
btrfs_set_super_chunk_root_generation(&super, 1);
btrfs_set_super_cache_generation(&super, -1);
btrfs_set_super_incompat_flags(&super, features);
if (label)
strncpy(super.label, label, BTRFS_LABEL_SIZE - 1);
@ -218,21 +221,30 @@ int make_btrfs(int fd, const char *device, const char *label,
nritems = 0;
itemoff = __BTRFS_LEAF_DATA_SIZE(leafsize);
for (i = 1; i < 7; i++) {
item_size = sizeof(struct btrfs_extent_item);
if (!skinny_metadata)
item_size += sizeof(struct btrfs_tree_block_info);
BUG_ON(blocks[i] < first_free);
BUG_ON(blocks[i] < blocks[i - 1]);
/* create extent item */
itemoff -= sizeof(struct btrfs_extent_item) +
sizeof(struct btrfs_tree_block_info);
itemoff -= item_size;
btrfs_set_disk_key_objectid(&disk_key, blocks[i]);
btrfs_set_disk_key_offset(&disk_key, leafsize);
btrfs_set_disk_key_type(&disk_key, BTRFS_EXTENT_ITEM_KEY);
if (skinny_metadata) {
btrfs_set_disk_key_type(&disk_key,
BTRFS_METADATA_ITEM_KEY);
btrfs_set_disk_key_offset(&disk_key, 0);
} else {
btrfs_set_disk_key_type(&disk_key,
BTRFS_EXTENT_ITEM_KEY);
btrfs_set_disk_key_offset(&disk_key, leafsize);
}
btrfs_set_item_key(buf, &disk_key, nritems);
btrfs_set_item_offset(buf, btrfs_item_nr(buf, nritems),
itemoff);
btrfs_set_item_size(buf, btrfs_item_nr(buf, nritems),
sizeof(struct btrfs_extent_item) +
sizeof(struct btrfs_tree_block_info));
item_size);
extent_item = btrfs_item_ptr(buf, nritems,
struct btrfs_extent_item);
btrfs_set_extent_refs(buf, extent_item, 1);

View File

@ -30,7 +30,7 @@
int make_btrfs(int fd, const char *device, const char *label,
u64 blocks[6], u64 num_bytes, u32 nodesize,
u32 leafsize, u32 sectorsize, u32 stripesize);
u32 leafsize, u32 sectorsize, u32 stripesize, u64 features);
int btrfs_make_root_dir(struct btrfs_trans_handle *trans,
struct btrfs_root *root, u64 objectid);
int btrfs_prepare_device(int fd, char *file, int zero_end, u64 *block_count_ret,