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btrfs-progs: Introduce function to initialize csum tree 

Introduce new function, setup_temp_csum_tree(), to setup temporary
csum tree for make_btrfs_v2().

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
master
Qu Wenruo 2016-01-29 13:03:20 +08:00 committed by David Sterba
parent b2da12034a
commit 1b8851ec40
1 changed files with 25 additions and 0 deletions
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25
utils.c
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@ -678,6 +678,28 @@ out:
return ret;
}
static int setup_temp_csum_tree(int fd, struct btrfs_mkfs_config *cfg,
u64 csum_bytenr)
{
struct extent_buffer *buf = NULL;
int ret;
buf = malloc(sizeof(*buf) + cfg->nodesize);
if (!buf)
return -ENOMEM;
ret = setup_temp_extent_buffer(buf, cfg, csum_bytenr,
BTRFS_CSUM_TREE_OBJECTID);
if (ret < 0)
goto out;
/*
* Temporary csum tree is completely empty.
*/
ret = write_temp_extent_buffer(fd, buf, csum_bytenr);
out:
free(buf);
return ret;
}
/*
* Improved version of make_btrfs().
*
@ -776,6 +798,9 @@ static int make_convert_btrfs(int fd, struct btrfs_mkfs_config *cfg,
if (ret < 0)
goto out;
ret = setup_temp_fs_tree(fd, cfg, fs_bytenr);
if (ret < 0)
goto out;
ret = setup_temp_csum_tree(fd, cfg, csum_bytenr);
out:
return ret;