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btrfs-progs: check: remove old mixed backref code

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A code added in 2009 (95d3f20b51) for a very short-lived change in
the format is no concern to us nowadays.

Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2017-08-30 16:56:51 +02:00
parent 4851de27f1
commit af3369ae31
1 changed files with 0 additions and 22 deletions
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22
cmds-check.c
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@ -66,7 +66,6 @@ static u64 total_extent_tree_bytes = 0;
static u64 btree_space_waste = 0;
static u64 data_bytes_allocated = 0;
static u64 data_bytes_referenced = 0;
static int found_old_backref = 0;
static LIST_HEAD(duplicate_extents);
static LIST_HEAD(delete_items);
static int no_holes = 0;
@ -7945,11 +7944,6 @@ static int run_next_block(struct btrfs_root *root,
total_fs_tree_bytes += buf->len;
if (btrfs_header_owner(buf) == BTRFS_EXTENT_TREE_OBJECTID)
total_extent_tree_bytes += buf->len;
if (!found_old_backref &&
btrfs_header_owner(buf) == BTRFS_TREE_RELOC_OBJECTID &&
btrfs_header_backref_rev(buf) == BTRFS_MIXED_BACKREF_REV &&
!btrfs_header_flag(buf, BTRFS_HEADER_FLAG_RELOC))
found_old_backref = 1;
out:
free_extent_buffer(buf);
return ret;
@ -11456,11 +11450,6 @@ static int traverse_tree_block(struct btrfs_root *root,
total_fs_tree_bytes += node->len;
if (btrfs_header_owner(node) == BTRFS_EXTENT_TREE_OBJECTID)
total_extent_tree_bytes += node->len;
if (!found_old_backref &&
btrfs_header_owner(node) == BTRFS_TREE_RELOC_OBJECTID &&
btrfs_header_backref_rev(node) == BTRFS_MIXED_BACKREF_REV &&
!btrfs_header_flag(node, BTRFS_HEADER_FLAG_RELOC))
found_old_backref = 1;
/* pre-order tranversal, check itself first */
level = btrfs_header_level(node);
@ -13150,17 +13139,6 @@ int cmd_check(int argc, char **argv)
err |= !!ret;
}
out:
if (found_old_backref) { /*
* there was a disk format change when mixed
* backref was in testing tree. The old format
* existed about one week.
*/
printf("\n * Found old mixed backref format. "
"The old format is not supported! *"
"\n * Please mount the FS in readonly mode, "
"backup data and re-format the FS. *\n\n");
err |= 1;
}
printf("found %llu bytes used, ",
(unsigned long long)bytes_used);
if (err)