Mention that FICLONE, FICLONERANGE, and FIDEDUPERANGE all require both
files to reside on the same filesystem.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
man2/ioctl_ficlonerange.2 | 1 +
man2/ioctl_fideduperange.2 | 1 +
2 files changed, 2 insertions(+)
diff --git a/man2/ioctl_ficlonerange.2 b/man2/ioctl_ficlonerange.2
index 0cb1567..c6e0762 100644
--- a/man2/ioctl_ficlonerange.2
+++ b/man2/ioctl_ficlonerange.2
@@ -36,6 +36,7 @@ file appear in the
.I dest_fd
file by sharing the underlying storage, which is faster than making a separate
physical copy of the data.
+Both files must reside within the same filesystem.
If a file write should occur to a shared region,
the filesystem must ensure that the changes remain private to the file being
written.
diff --git a/man2/ioctl_fideduperange.2 b/man2/ioctl_fideduperange.2
index c69f8c5..44a7765 100644
--- a/man2/ioctl_fideduperange.2
+++ b/man2/ioctl_fideduperange.2
@@ -34,6 +34,7 @@ file appear in the
.B dest_fd
file by sharing the underlying storage if the file data is identical
("deduplication").
+Both files must reside within the same filesystem.
This reduces storage consumption by allowing the filesystem
to store one shared copy of the data.
If a file write should occur to a shared
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