Hi All,
Piotr and Chris, pointed me at these bugs which could be triggered by this test case:
# btrfs sub create test1
# btrfs sub create test1/test2
# btrfs sub snap test1 test1.snap
# btrfs fi du -s test1
Total Exclusive Set shared Filename
0.00B 0.00B 0.00B test1
# btrfs fi du -s test1.snap
Total Exclusive Set shared Filename
ERROR: cannot check space of 'test1.snap': Inappropriate ioctl for device
These are two bugs:
1) in the function du_walk_dir() the error returned by du_add_file() normally
is ignored. But if du_walk_dir() "walks" the last items, the error is returned
to the caller
2) in the function du_add_file() it doesn't make sense to call
lookup_path_rootid() when the inode is BTRFS_EMPTY_SUBVOL_DIR_OBJECTID: in this
case the function doesn't return a valid value.
BR
G.Baroncelli
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