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smb: server: split out smb_direct_send_iter() out of smb_direct_writev()

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This will help to move to common code in future.

Cc: Namjae Jeon <linkinjeon@kernel.org>
Cc: Steve French <smfrench@gmail.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: linux-cifs@vger.kernel.org
Cc: samba-technical@lists.samba.org
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Stefan Metzmacher 2025-10-17 19:25:12 +02:00 committed by Steve French
parent da20536c50
commit 08ffdf0c41
1 changed files with 32 additions and 15 deletions
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47
fs/smb/server/transport_rdma.c
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@ -959,43 +959,47 @@ static int smb_direct_post_send_data(struct smbdirect_socket *sc,
return ret;
}
static int smb_direct_writev(struct ksmbd_transport *t,
struct kvec *iov, int niovs, int buflen,
bool need_invalidate, unsigned int remote_key)
static int smb_direct_send_iter(struct smbdirect_socket *sc,
struct iov_iter *iter,
bool need_invalidate,
unsigned int remote_key)
{
struct smb_direct_transport *st = SMBD_TRANS(t);
struct smbdirect_socket *sc = &st->socket;
struct smbdirect_socket_parameters *sp = &sc->parameters;
int ret;
struct smbdirect_send_batch send_ctx;
struct iov_iter iter;
int error = 0;
__be32 hdr;
if (sc->status != SMBDIRECT_SOCKET_CONNECTED)
return -ENOTCONN;
//FIXME: skip RFC1002 header..
if (WARN_ON_ONCE(niovs <= 1 || iov[0].iov_len != 4))
/*
* For now we expect the iter to have the full
* message, including a 4 byte length header.
*/
if (iov_iter_count(iter) <= 4)
return -EINVAL;
if (!copy_from_iter_full(&hdr, sizeof(hdr), iter))
return -EFAULT;
if (iov_iter_count(iter) != be32_to_cpu(hdr))
return -EINVAL;
iov_iter_kvec(&iter, ITER_SOURCE, iov, niovs, buflen);
iov_iter_advance(&iter, 4);
/*
* The size must fit into the negotiated
* fragmented send size.
*/
if (iov_iter_count(&iter) > sp->max_fragmented_send_size)
if (iov_iter_count(iter) > sp->max_fragmented_send_size)
return -EMSGSIZE;
ksmbd_debug(RDMA, "Sending smb (RDMA): smb_len=%zu\n",
iov_iter_count(&iter));
iov_iter_count(iter));
smb_direct_send_ctx_init(&send_ctx, need_invalidate, remote_key);
while (iov_iter_count(&iter)) {
while (iov_iter_count(iter)) {
ret = smb_direct_post_send_data(sc,
&send_ctx,
&iter,
iov_iter_count(&iter));
iter,
iov_iter_count(iter));
if (unlikely(ret)) {
error = ret;
break;
@ -1022,6 +1026,19 @@ static int smb_direct_writev(struct ksmbd_transport *t,
return ret;
}
static int smb_direct_writev(struct ksmbd_transport *t,
struct kvec *iov, int niovs, int buflen,
bool need_invalidate, unsigned int remote_key)
{
struct smb_direct_transport *st = SMBD_TRANS(t);
struct smbdirect_socket *sc = &st->socket;
struct iov_iter iter;
iov_iter_kvec(&iter, ITER_SOURCE, iov, niovs, buflen);
return smb_direct_send_iter(sc, &iter, need_invalidate, remote_key);
}
static int smb_direct_rdma_write(struct ksmbd_transport *t,
void *buf, unsigned int buflen,
struct smbdirect_buffer_descriptor_v1 *desc,