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smb: client: make use of struct smbdirect_recv_io

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This is the shared structure that will be used in
the server too and will allow us to move helper functions
into common code soon.

Cc: Steve French <smfrench@gmail.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: Long Li <longli@microsoft.com>
Cc: linux-cifs@vger.kernel.org
Cc: samba-technical@lists.samba.org
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Stefan Metzmacher 2025-08-05 18:11:33 +02:00 • committed by Steve French
parent 60812d20da
commit 5dddf04974
2 changed files with 41 additions and 54 deletions
Download patch file Download diff file Expand all files Collapse all files

79
fs/smb/client/smbdirect.c
View file

@ -13,23 +13,23 @@
#include "cifsproto.h"
#include "smb2proto.h"
static struct smbd_response *get_receive_buffer(
static struct smbdirect_recv_io *get_receive_buffer(
struct smbd_connection *info);
static void put_receive_buffer(
struct smbd_connection *info,
struct smbd_response *response);
struct smbdirect_recv_io *response);
static int allocate_receive_buffers(struct smbd_connection *info, int num_buf);
static void destroy_receive_buffers(struct smbd_connection *info);
static void enqueue_reassembly(
struct smbd_connection *info,
struct smbd_response *response, int data_length);
static struct smbd_response *_get_first_reassembly(
struct smbdirect_recv_io *response, int data_length);
static struct smbdirect_recv_io *_get_first_reassembly(
struct smbd_connection *info);
static int smbd_post_recv(
struct smbd_connection *info,
struct smbd_response *response);
struct smbdirect_recv_io *response);
static int smbd_post_send_empty(struct smbd_connection *info);
@ -260,7 +260,7 @@ static inline void *smbd_request_payload(struct smbd_request *request)
return (void *)request->packet;
}
static inline void *smbd_response_payload(struct smbd_response *response)
static inline void *smbdirect_recv_io_payload(struct smbdirect_recv_io *response)
{
return (void *)response->packet;
}
@ -315,12 +315,13 @@ static void dump_smbdirect_negotiate_resp(struct smbdirect_negotiate_resp *resp)
* return value: true if negotiation is a success, false if failed
*/
static bool process_negotiation_response(
struct smbd_response *response, int packet_length)
struct smbdirect_recv_io *response, int packet_length)
{
struct smbd_connection *info = response->info;
struct smbdirect_socket *sc = &info->socket;
struct smbdirect_socket *sc = response->socket;
struct smbd_connection *info =
container_of(sc, struct smbd_connection, socket);
struct smbdirect_socket_parameters *sp = &sc->parameters;
struct smbdirect_negotiate_resp *packet = smbd_response_payload(response);
struct smbdirect_negotiate_resp *packet = smbdirect_recv_io_payload(response);
if (packet_length < sizeof(struct smbdirect_negotiate_resp)) {
log_rdma_event(ERR,
@ -391,7 +392,7 @@ static void smbd_post_send_credits(struct work_struct *work)
{
int ret = 0;
int rc;
struct smbd_response *response;
struct smbdirect_recv_io *response;
struct smbd_connection *info =
container_of(work, struct smbd_connection,
post_send_credits_work);
@ -442,10 +443,11 @@ static void smbd_post_send_credits(struct work_struct *work)
static void recv_done(struct ib_cq *cq, struct ib_wc *wc)
{
struct smbdirect_data_transfer *data_transfer;
struct smbd_response *response =
container_of(wc->wr_cqe, struct smbd_response, cqe);
struct smbd_connection *info = response->info;
struct smbdirect_socket *sc = &info->socket;
struct smbdirect_recv_io *response =
container_of(wc->wr_cqe, struct smbdirect_recv_io, cqe);
struct smbdirect_socket *sc = response->socket;
struct smbd_connection *info =
container_of(sc, struct smbd_connection, socket);
int data_length = 0;
log_rdma_recv(INFO, "response=0x%p type=%d wc status=%d wc opcode %d byte_len=%d pkey_index=%u\n",
@ -467,7 +469,7 @@ static void recv_done(struct ib_cq *cq, struct ib_wc *wc)
switch (sc->recv_io.expected) {
/* SMBD negotiation response */
case SMBDIRECT_EXPECT_NEGOTIATE_REP:
dump_smbdirect_negotiate_resp(smbd_response_payload(response));
dump_smbdirect_negotiate_resp(smbdirect_recv_io_payload(response));
info->full_packet_received = true;
info->negotiate_done =
process_negotiation_response(response, wc->byte_len);
@ -477,7 +479,7 @@ static void recv_done(struct ib_cq *cq, struct ib_wc *wc)
/* SMBD data transfer packet */
case SMBDIRECT_EXPECT_DATA_TRANSFER:
data_transfer = smbd_response_payload(response);
data_transfer = smbdirect_recv_io_payload(response);
data_length = le32_to_cpu(data_transfer->data_length);
if (data_length) {
@ -1034,7 +1036,7 @@ static int smbd_post_send_full_iter(struct smbd_connection *info,
* The interaction is controlled by send/receive credit system
*/
static int smbd_post_recv(
struct smbd_connection *info, struct smbd_response *response)
struct smbd_connection *info, struct smbdirect_recv_io *response)
{
struct smbdirect_socket *sc = &info->socket;
struct smbdirect_socket_parameters *sp = &sc->parameters;
@ -1074,7 +1076,7 @@ static int smbd_negotiate(struct smbd_connection *info)
{
struct smbdirect_socket *sc = &info->socket;
int rc;
struct smbd_response *response = get_receive_buffer(info);
struct smbdirect_recv_io *response = get_receive_buffer(info);
sc->recv_io.expected = SMBDIRECT_EXPECT_NEGOTIATE_REP;
rc = smbd_post_recv(info, response);
@ -1119,7 +1121,7 @@ static int smbd_negotiate(struct smbd_connection *info)
*/
static void enqueue_reassembly(
struct smbd_connection *info,
struct smbd_response *response,
struct smbdirect_recv_io *response,
int data_length)
{
spin_lock(&info->reassembly_queue_lock);
@ -1143,14 +1145,14 @@ static void enqueue_reassembly(
* Caller is responsible for locking
* return value: the first entry if any, NULL if queue is empty
*/
static struct smbd_response *_get_first_reassembly(struct smbd_connection *info)
static struct smbdirect_recv_io *_get_first_reassembly(struct smbd_connection *info)
{
struct smbd_response *ret = NULL;
struct smbdirect_recv_io *ret = NULL;
if (!list_empty(&info->reassembly_queue)) {
ret = list_first_entry(
&info->reassembly_queue,
struct smbd_response, list);
struct smbdirect_recv_io, list);
}
return ret;
}
@ -1161,16 +1163,16 @@ static struct smbd_response *_get_first_reassembly(struct smbd_connection *info)
* pre-allocated in advance.
* return value: the receive buffer, NULL if none is available
*/
static struct smbd_response *get_receive_buffer(struct smbd_connection *info)
static struct smbdirect_recv_io *get_receive_buffer(struct smbd_connection *info)
{
struct smbd_response *ret = NULL;
struct smbdirect_recv_io *ret = NULL;
unsigned long flags;
spin_lock_irqsave(&info->receive_queue_lock, flags);
if (!list_empty(&info->receive_queue)) {
ret = list_first_entry(
&info->receive_queue,
struct smbd_response, list);
struct smbdirect_recv_io, list);
list_del(&ret->list);
info->count_receive_queue--;
info->count_get_receive_buffer++;
@ -1187,7 +1189,7 @@ static struct smbd_response *get_receive_buffer(struct smbd_connection *info)
* receive buffer is returned.
*/
static void put_receive_buffer(
struct smbd_connection *info, struct smbd_response *response)
struct smbd_connection *info, struct smbdirect_recv_io *response)
{
struct smbdirect_socket *sc = &info->socket;
unsigned long flags;
@ -1212,8 +1214,9 @@ static void put_receive_buffer(
/* Preallocate all receive buffer on transport establishment */
static int allocate_receive_buffers(struct smbd_connection *info, int num_buf)
{
struct smbdirect_socket *sc = &info->socket;
struct smbdirect_recv_io *response;
int i;
struct smbd_response *response;
INIT_LIST_HEAD(&info->reassembly_queue);
spin_lock_init(&info->reassembly_queue_lock);
@ -1231,7 +1234,7 @@ static int allocate_receive_buffers(struct smbd_connection *info, int num_buf)
if (!response)
goto allocate_failed;
response->info = info;
response->socket = sc;
response->sge.length = 0;
list_add_tail(&response->list, &info->receive_queue);
info->count_receive_queue++;
@ -1243,7 +1246,7 @@ allocate_failed:
while (!list_empty(&info->receive_queue)) {
response = list_first_entry(
&info->receive_queue,
struct smbd_response, list);
struct smbdirect_recv_io, list);
list_del(&response->list);
info->count_receive_queue--;
@ -1254,7 +1257,7 @@ allocate_failed:
static void destroy_receive_buffers(struct smbd_connection *info)
{
struct smbd_response *response;
struct smbdirect_recv_io *response;
while ((response = get_receive_buffer(info)))
mempool_free(response, info->response_mempool);
@ -1295,7 +1298,7 @@ void smbd_destroy(struct TCP_Server_Info *server)
struct smbd_connection *info = server->smbd_conn;
struct smbdirect_socket *sc;
struct smbdirect_socket_parameters *sp;
struct smbd_response *response;
struct smbdirect_recv_io *response;
unsigned long flags;
if (!info) {
@ -1456,17 +1459,17 @@ static int allocate_caches_and_workqueue(struct smbd_connection *info)
if (!info->request_mempool)
goto out1;
scnprintf(name, MAX_NAME_LEN, "smbd_response_%p", info);
scnprintf(name, MAX_NAME_LEN, "smbdirect_recv_io_%p", info);
struct kmem_cache_args response_args = {
.align = __alignof__(struct smbd_response),
.useroffset = (offsetof(struct smbd_response, packet) +
.align = __alignof__(struct smbdirect_recv_io),
.useroffset = (offsetof(struct smbdirect_recv_io, packet) +
sizeof(struct smbdirect_data_transfer)),
.usersize = sp->max_recv_size - sizeof(struct smbdirect_data_transfer),
};
info->response_cache =
kmem_cache_create(name,
sizeof(struct smbd_response) + sp->max_recv_size,
sizeof(struct smbdirect_recv_io) + sp->max_recv_size,
&response_args, SLAB_HWCACHE_ALIGN);
if (!info->response_cache)
goto out2;
@ -1756,7 +1759,7 @@ try_again:
int smbd_recv(struct smbd_connection *info, struct msghdr *msg)
{
struct smbdirect_socket *sc = &info->socket;
struct smbd_response *response;
struct smbdirect_recv_io *response;
struct smbdirect_data_transfer *data_transfer;
size_t size = iov_iter_count(&msg->msg_iter);
int to_copy, to_read, data_read, offset;
@ -1792,7 +1795,7 @@ again:
offset = info->first_entry_offset;
while (data_read < size) {
response = _get_first_reassembly(info);
data_transfer = smbd_response_payload(response);
data_transfer = smbdirect_recv_io_payload(response);
data_length = le32_to_cpu(data_transfer->data_length);
remaining_data_length =
le32_to_cpu(

16
fs/smb/client/smbdirect.h
View file

@ -175,22 +175,6 @@ struct smbd_request {
/* Maximum number of SGEs used by smbdirect.c in any receive work request */
#define SMBDIRECT_MAX_RECV_SGE 1
/* The context for a SMBD response */
struct smbd_response {
struct smbd_connection *info;
struct ib_cqe cqe;
struct ib_sge sge;
/* Link to receive queue or reassembly queue */
struct list_head list;
/* Indicate if this is the 1st packet of a payload */
bool first_segment;
/* SMBD packet header and payload follows this structure */
u8 packet[];
};
/* Create a SMBDirect session */
struct smbd_connection *smbd_get_connection(
struct TCP_Server_Info *server, struct sockaddr *dstaddr);