@@ -6124,25 +6124,33 @@ static noinline int smb2_read_pipe(struct ksmbd_work *work)
return err;
}
-static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
- struct smb2_read_req *req, void *data_buf,
- size_t length)
+static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work,
+ struct smb2_buffer_desc_v1 *desc,
+ __le32 Channel,
+ __le16 ChannelInfoOffset,
+ __le16 ChannelInfoLength)
{
- struct smb2_buffer_desc_v1 *desc =
- (struct smb2_buffer_desc_v1 *)&req->Buffer[0];
- int err;
-
if (work->conn->dialect == SMB30_PROT_ID &&
- req->Channel != SMB2_CHANNEL_RDMA_V1)
+ Channel != SMB2_CHANNEL_RDMA_V1)
return -EINVAL;
- if (req->ReadChannelInfoOffset == 0 ||
- le16_to_cpu(req->ReadChannelInfoLength) < sizeof(*desc))
+ if (ChannelInfoOffset == 0 ||
+ le16_to_cpu(ChannelInfoLength) < sizeof(*desc))
return -EINVAL;
work->need_invalidate_rkey =
- (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
+ (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
work->remote_key = le32_to_cpu(desc->token);
+ return 0;
+}
+
+static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
+ struct smb2_read_req *req, void *data_buf,
+ size_t length)
+{
+ struct smb2_buffer_desc_v1 *desc =
+ (struct smb2_buffer_desc_v1 *)&req->Buffer[0];
+ int err;
err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
le32_to_cpu(desc->token),
@@ -6179,6 +6187,18 @@ int smb2_read(struct ksmbd_work *work)
return smb2_read_pipe(work);
}
+ if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
+ req->Channel == SMB2_CHANNEL_RDMA_V1) {
+ err = smb2_set_remote_key_for_rdma(work,
+ (struct smb2_buffer_desc_v1 *)
+ &req->Buffer[0],
+ req->Channel,
+ req->ReadChannelInfoOffset,
+ req->ReadChannelInfoLength);
+ if (err)
+ goto out;
+ }
+
fp = ksmbd_lookup_fd_slow(work, le64_to_cpu(req->VolatileFileId),
le64_to_cpu(req->PersistentFileId));
if (!fp) {
@@ -6364,21 +6384,6 @@ static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
desc = (struct smb2_buffer_desc_v1 *)&req->Buffer[0];
- if (work->conn->dialect == SMB30_PROT_ID &&
- req->Channel != SMB2_CHANNEL_RDMA_V1)
- return -EINVAL;
-
- if (req->Length != 0 || req->DataOffset != 0)
- return -EINVAL;
-
- if (req->WriteChannelInfoOffset == 0 ||
- le16_to_cpu(req->WriteChannelInfoLength) < sizeof(*desc))
- return -EINVAL;
-
- work->need_invalidate_rkey =
- (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
- work->remote_key = le32_to_cpu(desc->token);
-
data_buf = kvmalloc(length, GFP_KERNEL | __GFP_ZERO);
if (!data_buf)
return -ENOMEM;
@@ -6425,6 +6430,20 @@ int smb2_write(struct ksmbd_work *work)
return smb2_write_pipe(work);
}
+ if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||
+ req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
+ if (req->Length != 0 || req->DataOffset != 0)
+ return -EINVAL;
+ err = smb2_set_remote_key_for_rdma(work,
+ (struct smb2_buffer_desc_v1 *)
+ &req->Buffer[0],
+ req->Channel,
+ req->WriteChannelInfoOffset,
+ req->WriteChannelInfoLength);
+ if (err)
+ goto out;
+ }
+
if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
ksmbd_debug(SMB, "User does not have write permission\n");
err = -EACCES;
if the Channel of a SMB2 WRITE request is SMB2_CHANNEL_RDMA_V1_INVALIDTE, a client does not invalidate its memory regions but ksmbd must do it by sending a SMB2 WRITE response with IB_WR_SEND_WITH_INV. But if errors occur while processing a SMB2 READ/WRITE request, ksmbd sends a response with IB_WR_SEND. So a client could use memory regions already in use. Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com> --- changes from v1: - factor out setting a remote key to helper functions. changes from v2: - Make helper functions one smb2_set_remote_key_for_rdma. fs/ksmbd/smb2pdu.c | 71 +++++++++++++++++++++++++++++----------------- 1 file changed, 45 insertions(+), 26 deletions(-)