ksmbd: support copychunk for alternate data streams

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Copychunk rejects requests when either handle refers to an alternate
data stream. These streams are stored in extended attributes and cannot
be passed directly to vfs_copy_file_range().

Use the bounded buffered copy path when a source or destination is a
stream. Obtain the source length from the stream extended attribute and
perform I/O through the existing stream-aware read and write helpers.
Keep vfs_copy_file_range() and its fallback for regular files only.

Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>

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Namjae Jeon 2026-07-07 21:41:11 +09:00

parent f7c0366e0a

commit 8482150a07

1 changed files with 50 additions and 30 deletions

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fs/smb/server/vfs.c

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