When using the FIDEDUPRANGE ioctl, in case of success the requested size
is returned. In some cases this might not be the actual amount of bytes
deduplicated.
This change modifies vfs_dedupe_file_range() to report the actual amount
of bytes deduplicated, instead of the requested amount.
Link:
https://lore.kernel.org/linux-fsdevel/5548ef63-62f9-4f46-5793-03165ceccacc@xxxxxxxxxxxxxxx/
Reported-by: Ansgar Lößer (ansgar.loesser@xxxxxxxxxxxxxxxxxxx)
Reported-by: Max Schlecht (max.schlecht@xxxxxxxxxxxxxxxxxxxxxxx)
Reported-by: Björn Scheuermann (scheuermann@xxxxxxxxxxxxxxxxxxx)
Signed-off-by: Ansgar Lößer <ansgar.loesser@xxxxxxxxxxxxxxxxxxx>
---
Mind sending it with a sign-off and a short commit message?
Linus
Sure, thank you!
This is my first commit, so I hope it is ok like this.
fs/remap_range.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/remap_range.c b/fs/remap_range.c
index e112b5424cdb..072c2c48aeed 100644
--- a/fs/remap_range.c
+++ b/fs/remap_range.c
@@ -546,7 +546,7 @@ int vfs_dedupe_file_range(struct file *file, struct
file_dedupe_range *same)
else if (deduped < 0)
info->status = deduped;
else
- info->bytes_deduped = len;
+ info->bytes_deduped = deduped;
next_fdput:
fdput(dst_fd);
--
2.35.1
--
M.Sc. Ansgar Lößer
Fachgebiet Kommunikationsnetze
Fachbereich für Elektrotechnik und Informationstechnik
Technische Universität Darmstadt
Rundeturmstraße 10
64283 Darmstadt
E-Mail: ansgar.loesser@xxxxxxxxxxxxxxxxxxx
http://www.kom.tu-darmstadt.de
