Add (stub) functions for doing netmem allocations. We want to allocate
memory from the netmem buffering as that does bulk DMA and IOMMU
management.
Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
cc: Steve French <sfrench@xxxxxxxxx>
cc: Paulo Alcantara <pc@xxxxxxxxxxxxx>
cc: Shyam Prasad N <sprasad@xxxxxxxxxxxxx>
cc: Tom Talpey <tom@xxxxxxxxxx>
cc: linux-cifs@xxxxxxxxxxxxxxx
cc: netfs@xxxxxxxxxxxxxxx
cc: linux-fsdevel@xxxxxxxxxxxxxxx
---
fs/smb/client/cifsproto.h | 3 +++
fs/smb/client/transport.c | 15 +++++++++++++++
2 files changed, 18 insertions(+)
diff --git a/fs/smb/client/cifsproto.h b/fs/smb/client/cifsproto.h
index 074b65bb57a5..ccd70a402567 100644
--- a/fs/smb/client/cifsproto.h
+++ b/fs/smb/client/cifsproto.h
@@ -766,4 +766,7 @@ void smb_get_message(struct smb_message *smb, enum smb_message_trace trace);
void smb_put_message(struct smb_message *smb, enum smb_message_trace trace);
void smb_put_messages(struct smb_message *smb);
+void *cifs_allocate_tx_buf(struct TCP_Server_Info *server, size_t size);
+void cifs_free_tx_buf(void *p);
+
#endif /* _CIFSPROTO_H */
diff --git a/fs/smb/client/transport.c b/fs/smb/client/transport.c
index 2ccfdd6b958b..b497bf319a7e 100644
--- a/fs/smb/client/transport.c
+++ b/fs/smb/client/transport.c
@@ -32,6 +32,21 @@
#include "smbdirect.h"
#include "compress.h"
+/*
+ * Allocate transmission buffers for a socket. This memory will be allocated
+ * from the netmem buffers. It comes with a page ref that we need to drop.
+ * The networking layer can pin it by getting its own ref.
+ */
+void *cifs_allocate_tx_buf(struct TCP_Server_Info *server, size_t size)
+{
+ return NULL; /* TODO */
+}
+
+void cifs_free_tx_buf(void *p)
+{
+ /* TODO */
+}
+
struct smb_message *smb_message_alloc(enum smb2_command cmd, gfp_t gfp)
{
static atomic_t debug_ids;
