[PATCH v2 0/2] btrfs: send: fix sending link commands for existing file paths

[bingjingc <bingjingc@synology.com>]

From: BingJing Chang <bingjingc@synology.com>

There is a bug sending link commands for existing file paths. When we're
processing an inode, we go over all references. All the new file paths are
added to the "new_refs" list. And all the deleted file paths are added to
the "deleted_refs" list. In the end, when we finish processing the inode,
we iterate over all the items in the "new_refs" list and send link commands
for those file paths. After that, we go over all the items in the
"deleted_refs" list and send unlink commands for them. If there are
duplicated file paths in both lists, we will try to create them before we
remove them. Then the receiver gets an -EEXIST error when trying the link
operations.

BingJing Chang (2):
  btrfs: send: introduce recorded_ref_alloc and recorded_ref_free
  btrfs: send: fix sending link commands for existing file paths

 fs/btrfs/send.c | 195 ++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 181 insertions(+), 14 deletions(-)

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2.37.0