ksmbd: skip fallocate for SMB2_CREATE_ALLOCATION_SIZE on a stream handle

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smb2_open() calls vfs_fallocate(fp->filp, ...) unconditionally when a
client's CREATE request includes an AllocationSize create context.
For a stream handle, fp->filp refers to the base file's data fork
(streams are xattr-backed on the same underlying file, not separate
files), so this pre-allocates storage on the base file's actual data
instead of doing anything meaningful for the stream -- fallocate has
no applicability to an xattr-backed stream at all.

Skip the fallocate call for stream handles.

Assisted-by: Claude:claude-sonnet-5
Signed-off-by: Gael Blivet <gael.blivet@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>

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Gael Blivet 2026-07-09 02:01:11 +02:00 • committed by Namjae Jeon

parent 86f9018030

commit bfdf81c62f

1 changed files with 16 additions and 7 deletions

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fs/smb/server/smb2pdu.c

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