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btrfs-progs: check: fix error reporting on root inode

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If btrfs check detects an error on the root inode of a subvolume it
prints:

    Opening filesystem to check...
    Checking filesystem on /dev/vdc
    UUID: 4ac7a216-bf97-4c5f-9899-0f203c20d8af
    [1/7] checking root items
    [2/7] checking extents
    [3/7] checking free space cache
    [4/7] checking fs roots
    root 5 root dir 256 error
    ERROR: errors found in fs roots
    found 196608 bytes used, error(s) found
    total csum bytes: 0
    total tree bytes: 131072
    total fs tree bytes: 32768
    total extent tree bytes: 16384
    btree space waste bytes: 124376
    file data blocks allocated: 65536
     referenced 65536

This is not very helpful since there is no specific information about
the exact error. This is due to the fact that check_root_dir doesn't
set inode_record::errors accordingly. This patch rectifies this and now
the output would look like:

	[1/7] checking root items
	[2/7] checking extents
	[3/7] checking free space cache
	[4/7] checking fs roots
	root 5 inode 256 errors 2000, link count wrong
	ERROR: errors found in fs roots
	found 196608 bytes used, error(s) found
	total csum bytes: 0
	total tree bytes: 131072
	total fs tree bytes: 32768
	total extent tree bytes: 16384
	btree space waste bytes: 124376
	file data blocks allocated: 65536
	 referenced 65536

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Nikolay Borisov 2020-08-24 17:00:49 +03:00 committed by David Sterba
parent fedc94091f
commit c08983291e
1 changed files with 31 additions and 9 deletions
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40
check/main.c
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@ -1882,20 +1882,45 @@ static int check_root_dir(struct inode_record *rec)
struct inode_backref *backref;
int ret = -1;
if (!rec->found_inode_item || rec->errors)
if (rec->errors)
goto out;
if (rec->nlink != 1 || rec->found_link != 0)
if (!rec->found_inode_item) {
rec->errors |= I_ERR_NO_INODE_ITEM;
goto out;
if (list_empty(&rec->backrefs))
}
if (rec->nlink != 1 || rec->found_link != 0) {
rec->errors |= I_ERR_LINK_COUNT_WRONG;
goto out;
}
if (list_empty(&rec->backrefs)) {
rec->errors |= REF_ERR_NO_ROOT_BACKREF;
goto out;
}
backref = to_inode_backref(rec->backrefs.next);
if (!backref->found_inode_ref)
if (!backref->found_inode_ref) {
rec->errors |= REF_ERR_NO_INODE_REF;
goto out;
}
if (backref->index != 0 || backref->namelen != 2 ||
memcmp(backref->name, "..", 2))
memcmp(backref->name, "..", 2)) {
rec->errors |= I_ERR_ODD_DIR_ITEM;
goto out;
if (backref->found_dir_index || backref->found_dir_item)
}
if (backref->found_dir_index) {
rec->errors |= REF_ERR_DUP_DIR_INDEX;
goto out;
}
if (backref->found_dir_item) {
rec->errors |= REF_ERR_DUP_DIR_ITEM;
goto out;
}
ret = 0;
out:
return ret;
@ -2989,9 +3014,6 @@ static int check_inode_recs(struct btrfs_root *root,
}
ret = check_root_dir(rec);
if (ret) {
fprintf(stderr, "root %llu root dir %llu error\n",
(unsigned long long)root->root_key.objectid,
(unsigned long long)root_dirid);
print_inode_error(root, rec);
error++;
}