ksmbd: don't remove dos attribute xattr on O_TRUNC open
[ Upstream commit 17661ecf ] When smb client open file in ksmbd share with O_TRUNC, dos attribute xattr is removed as well as data in file. This cause the FSCTL_SET_SPARSE request from the client fails because ksmbd can't update the dos attribute after setting ATTR_SPARSE_FILE. And this patch fix xfstests generic/469 test also. Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Steve French <stfrench@microsoft.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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