Commit 4a57a840 authored by Ansgar Lößer's avatar Ansgar Lößer Committed by Linus Torvalds

vf/remap: return the amount of bytes actually deduplicated

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@tu-darmstadt.de/Reported-by: default avatarAnsgar Lößer <ansgar.loesser@kom.tu-darmstadt.de>
Reported-by: default avatarMax Schlecht <max.schlecht@informatik.hu-berlin.de>
Reported-by: default avatarBjörn Scheuermann <scheuermann@kom.tu-darmstadt.de>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Darrick J Wong <djwong@kernel.org>
Signed-off-by: default avatarAnsgar Lößer <ansgar.loesser@kom.tu-darmstadt.de>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent d0b97f38
...@@ -547,7 +547,7 @@ int vfs_dedupe_file_range(struct file *file, struct file_dedupe_range *same) ...@@ -547,7 +547,7 @@ int vfs_dedupe_file_range(struct file *file, struct file_dedupe_range *same)
else if (deduped < 0) else if (deduped < 0)
info->status = deduped; info->status = deduped;
else else
info->bytes_deduped = len; info->bytes_deduped = deduped;
next_fdput: next_fdput:
fdput(dst_fd); fdput(dst_fd);
......
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