summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--Documentation/networking/rxrpc.txt43
-rw-r--r--fs/afs/rxrpc.c18
-rw-r--r--include/linux/rxrpc.h25
-rw-r--r--include/net/af_rxrpc.h2
-rw-r--r--net/rxrpc/af_rxrpc.c35
-rw-r--r--net/rxrpc/ar-internal.h3
-rw-r--r--net/rxrpc/call_object.c3
-rw-r--r--net/rxrpc/sendmsg.c135
8 files changed, 207 insertions, 57 deletions
diff --git a/Documentation/networking/rxrpc.txt b/Documentation/networking/rxrpc.txt
index 18078e630a63..8c70ba5dee4d 100644
--- a/Documentation/networking/rxrpc.txt
+++ b/Documentation/networking/rxrpc.txt
@@ -327,6 +327,7 @@ calls, to invoke certain actions and to report certain conditions. These are:
RXRPC_ACCEPT s-- n/a Accept new call
RXRPC_EXCLUSIVE_CALL s-- n/a Make an exclusive client call
RXRPC_UPGRADE_SERVICE s-- n/a Client call can be upgraded
+ RXRPC_TX_LENGTH s-- data len Total length of Tx data
(SRT = usable in Sendmsg / delivered by Recvmsg / Terminal message)
@@ -406,6 +407,23 @@ calls, to invoke certain actions and to report certain conditions. These are:
future communication to that server and RXRPC_UPGRADE_SERVICE should no
longer be set.
+ (*) RXRPC_TX_LENGTH
+
+ This is used to inform the kernel of the total amount of data that is
+ going to be transmitted by a call (whether in a client request or a
+ service response). If given, it allows the kernel to encrypt from the
+ userspace buffer directly to the packet buffers, rather than copying into
+ the buffer and then encrypting in place. This may only be given with the
+ first sendmsg() providing data for a call. EMSGSIZE will be generated if
+ the amount of data actually given is different.
+
+ This takes a parameter of __s64 type that indicates how much will be
+ transmitted. This may not be less than zero.
+
+The symbol RXRPC__SUPPORTED is defined as one more than the highest control
+message type supported. At run time this can be queried by means of the
+RXRPC_SUPPORTED_CMSG socket option (see below).
+
==============
SOCKET OPTIONS
@@ -459,6 +477,11 @@ AF_RXRPC sockets support a few socket options at the SOL_RXRPC level:
must point to an array of two unsigned short ints. The first is the
service ID to upgrade from and the second the service ID to upgrade to.
+ (*) RXRPC_SUPPORTED_CMSG
+
+ This is a read-only option that writes an int into the buffer indicating
+ the highest control message type supported.
+
========
SECURITY
@@ -568,6 +591,9 @@ A client would issue an operation by:
MSG_MORE should be set in msghdr::msg_flags on all but the last part of
the request. Multiple requests may be made simultaneously.
+ An RXRPC_TX_LENGTH control message can also be specified on the first
+ sendmsg() call.
+
If a call is intended to go to a destination other than the default
specified through connect(), then msghdr::msg_name should be set on the
first request message of that call.
@@ -755,6 +781,7 @@ The kernel interface functions are as follows:
struct sockaddr_rxrpc *srx,
struct key *key,
unsigned long user_call_ID,
+ s64 tx_total_len,
gfp_t gfp);
This allocates the infrastructure to make a new RxRPC call and assigns
@@ -771,6 +798,11 @@ The kernel interface functions are as follows:
control data buffer. It is entirely feasible to use this to point to a
kernel data structure.
+ tx_total_len is the amount of data the caller is intending to transmit
+ with this call (or -1 if unknown at this point). Setting the data size
+ allows the kernel to encrypt directly to the packet buffers, thereby
+ saving a copy. The value may not be less than -1.
+
If this function is successful, an opaque reference to the RxRPC call is
returned. The caller now holds a reference on this and it must be
properly ended.
@@ -922,6 +954,17 @@ The kernel interface functions are as follows:
This is used to find the remote peer address of a call.
+ (*) Set the total transmit data size on a call.
+
+ void rxrpc_kernel_set_tx_length(struct socket *sock,
+ struct rxrpc_call *call,
+ s64 tx_total_len);
+
+ This sets the amount of data that the caller is intending to transmit on a
+ call. It's intended to be used for setting the reply size as the request
+ size should be set when the call is begun. tx_total_len may not be less
+ than zero.
+
=======================
CONFIGURABLE PARAMETERS
diff --git a/fs/afs/rxrpc.c b/fs/afs/rxrpc.c
index d5990eb160bd..02781e78ffb6 100644
--- a/fs/afs/rxrpc.c
+++ b/fs/afs/rxrpc.c
@@ -341,6 +341,7 @@ int afs_make_call(struct in_addr *addr, struct afs_call *call, gfp_t gfp,
struct msghdr msg;
struct kvec iov[1];
size_t offset;
+ s64 tx_total_len;
u32 abort_code;
int ret;
@@ -364,9 +365,20 @@ int afs_make_call(struct in_addr *addr, struct afs_call *call, gfp_t gfp,
srx.transport.sin.sin_port = call->port;
memcpy(&srx.transport.sin.sin_addr, addr, 4);
+ /* Work out the length we're going to transmit. This is awkward for
+ * calls such as FS.StoreData where there's an extra injection of data
+ * after the initial fixed part.
+ */
+ tx_total_len = call->request_size;
+ if (call->send_pages) {
+ tx_total_len += call->last_to - call->first_offset;
+ tx_total_len += (call->last - call->first) * PAGE_SIZE;
+ }
+
/* create a call */
rxcall = rxrpc_kernel_begin_call(afs_socket, &srx, call->key,
- (unsigned long) call, gfp,
+ (unsigned long)call,
+ tx_total_len, gfp,
(async ?
afs_wake_up_async_call :
afs_wake_up_call_waiter));
@@ -738,6 +750,8 @@ void afs_send_empty_reply(struct afs_call *call)
_enter("");
+ rxrpc_kernel_set_tx_length(afs_socket, call->rxcall, 0);
+
msg.msg_name = NULL;
msg.msg_namelen = 0;
iov_iter_kvec(&msg.msg_iter, WRITE | ITER_KVEC, NULL, 0, 0);
@@ -772,6 +786,8 @@ void afs_send_simple_reply(struct afs_call *call, const void *buf, size_t len)
_enter("");
+ rxrpc_kernel_set_tx_length(afs_socket, call->rxcall, len);
+
iov[0].iov_base = (void *) buf;
iov[0].iov_len = len;
msg.msg_name = NULL;
diff --git a/include/linux/rxrpc.h b/include/linux/rxrpc.h
index 707910c6c6c5..7343f71783dc 100644
--- a/include/linux/rxrpc.h
+++ b/include/linux/rxrpc.h
@@ -38,6 +38,7 @@ struct sockaddr_rxrpc {
#define RXRPC_EXCLUSIVE_CONNECTION 3 /* Deprecated; use RXRPC_EXCLUSIVE_CALL instead */
#define RXRPC_MIN_SECURITY_LEVEL 4 /* minimum security level */
#define RXRPC_UPGRADEABLE_SERVICE 5 /* Upgrade service[0] -> service[1] */
+#define RXRPC_SUPPORTED_CMSG 6 /* Get highest supported control message type */
/*
* RxRPC control messages
@@ -45,16 +46,20 @@ struct sockaddr_rxrpc {
* - terminal messages mean that a user call ID tag can be recycled
* - s/r/- indicate whether these are applicable to sendmsg() and/or recvmsg()
*/
-#define RXRPC_USER_CALL_ID 1 /* sr: user call ID specifier */
-#define RXRPC_ABORT 2 /* sr: abort request / notification [terminal] */
-#define RXRPC_ACK 3 /* -r: [Service] RPC op final ACK received [terminal] */
-#define RXRPC_NET_ERROR 5 /* -r: network error received [terminal] */
-#define RXRPC_BUSY 6 /* -r: server busy received [terminal] */
-#define RXRPC_LOCAL_ERROR 7 /* -r: local error generated [terminal] */
-#define RXRPC_NEW_CALL 8 /* -r: [Service] new incoming call notification */
-#define RXRPC_ACCEPT 9 /* s-: [Service] accept request */
-#define RXRPC_EXCLUSIVE_CALL 10 /* s-: Call should be on exclusive connection */
-#define RXRPC_UPGRADE_SERVICE 11 /* s-: Request service upgrade for client call */
+enum rxrpc_cmsg_type {
+ RXRPC_USER_CALL_ID = 1, /* sr: user call ID specifier */
+ RXRPC_ABORT = 2, /* sr: abort request / notification [terminal] */
+ RXRPC_ACK = 3, /* -r: [Service] RPC op final ACK received [terminal] */
+ RXRPC_NET_ERROR = 5, /* -r: network error received [terminal] */
+ RXRPC_BUSY = 6, /* -r: server busy received [terminal] */
+ RXRPC_LOCAL_ERROR = 7, /* -r: local error generated [terminal] */
+ RXRPC_NEW_CALL = 8, /* -r: [Service] new incoming call notification */
+ RXRPC_ACCEPT = 9, /* s-: [Service] accept request */
+ RXRPC_EXCLUSIVE_CALL = 10, /* s-: Call should be on exclusive connection */
+ RXRPC_UPGRADE_SERVICE = 11, /* s-: Request service upgrade for client call */
+ RXRPC_TX_LENGTH = 12, /* s-: Total length of Tx data */
+ RXRPC__SUPPORTED
+};
/*
* RxRPC security levels
diff --git a/include/net/af_rxrpc.h b/include/net/af_rxrpc.h
index b5f5187f488c..c172709787af 100644
--- a/include/net/af_rxrpc.h
+++ b/include/net/af_rxrpc.h
@@ -33,6 +33,7 @@ struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *,
struct sockaddr_rxrpc *,
struct key *,
unsigned long,
+ s64,
gfp_t,
rxrpc_notify_rx_t);
int rxrpc_kernel_send_data(struct socket *, struct rxrpc_call *,
@@ -46,5 +47,6 @@ void rxrpc_kernel_get_peer(struct socket *, struct rxrpc_call *,
struct sockaddr_rxrpc *);
int rxrpc_kernel_charge_accept(struct socket *, rxrpc_notify_rx_t,
rxrpc_user_attach_call_t, unsigned long, gfp_t);
+void rxrpc_kernel_set_tx_length(struct socket *, struct rxrpc_call *, s64);
#endif /* _NET_RXRPC_H */
diff --git a/net/rxrpc/af_rxrpc.c b/net/rxrpc/af_rxrpc.c
index 0c4dc4a7832c..58ae0db52ea1 100644
--- a/net/rxrpc/af_rxrpc.c
+++ b/net/rxrpc/af_rxrpc.c
@@ -262,6 +262,7 @@ static int rxrpc_listen(struct socket *sock, int backlog)
* @srx: The address of the peer to contact
* @key: The security context to use (defaults to socket setting)
* @user_call_ID: The ID to use
+ * @tx_total_len: Total length of data to transmit during the call (or -1)
* @gfp: The allocation constraints
* @notify_rx: Where to send notifications instead of socket queue
*
@@ -276,6 +277,7 @@ struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock,
struct sockaddr_rxrpc *srx,
struct key *key,
unsigned long user_call_ID,
+ s64 tx_total_len,
gfp_t gfp,
rxrpc_notify_rx_t notify_rx)
{
@@ -303,7 +305,8 @@ struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock,
cp.security_level = 0;
cp.exclusive = false;
cp.service_id = srx->srx_service;
- call = rxrpc_new_client_call(rx, &cp, srx, user_call_ID, gfp);
+ call = rxrpc_new_client_call(rx, &cp, srx, user_call_ID, tx_total_len,
+ gfp);
/* The socket has been unlocked. */
if (!IS_ERR(call))
call->notify_rx = notify_rx;
@@ -582,6 +585,34 @@ error:
}
/*
+ * Get socket options.
+ */
+static int rxrpc_getsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int __user *_optlen)
+{
+ int optlen;
+
+ if (level != SOL_RXRPC)
+ return -EOPNOTSUPP;
+
+ if (get_user(optlen, _optlen))
+ return -EFAULT;
+
+ switch (optname) {
+ case RXRPC_SUPPORTED_CMSG:
+ if (optlen < sizeof(int))
+ return -ETOOSMALL;
+ if (put_user(RXRPC__SUPPORTED - 1, (int __user *)optval) ||
+ put_user(sizeof(int), _optlen))
+ return -EFAULT;
+ return 0;
+
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+/*
* permit an RxRPC socket to be polled
*/
static unsigned int rxrpc_poll(struct file *file, struct socket *sock,
@@ -784,7 +815,7 @@ static const struct proto_ops rxrpc_rpc_ops = {
.listen = rxrpc_listen,
.shutdown = rxrpc_shutdown,
.setsockopt = rxrpc_setsockopt,
- .getsockopt = sock_no_getsockopt,
+ .getsockopt = rxrpc_getsockopt,
.sendmsg = rxrpc_sendmsg,
.recvmsg = rxrpc_recvmsg,
.mmap = sock_no_mmap,
diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h
index e9b536cb0acf..adbf37946450 100644
--- a/net/rxrpc/ar-internal.h
+++ b/net/rxrpc/ar-internal.h
@@ -528,6 +528,7 @@ struct rxrpc_call {
struct rb_node sock_node; /* Node in rx->calls */
struct sk_buff *tx_pending; /* Tx socket buffer being filled */
wait_queue_head_t waitq; /* Wait queue for channel or Tx */
+ s64 tx_total_len; /* Total length left to be transmitted (or -1) */
__be32 crypto_buf[2]; /* Temporary packet crypto buffer */
unsigned long user_call_ID; /* user-defined call ID */
unsigned long flags;
@@ -683,7 +684,7 @@ struct rxrpc_call *rxrpc_alloc_call(gfp_t);
struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
struct rxrpc_conn_parameters *,
struct sockaddr_rxrpc *,
- unsigned long, gfp_t);
+ unsigned long, s64, gfp_t);
void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *,
struct sk_buff *);
void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *);
diff --git a/net/rxrpc/call_object.c b/net/rxrpc/call_object.c
index 692110808baa..423030fd93be 100644
--- a/net/rxrpc/call_object.c
+++ b/net/rxrpc/call_object.c
@@ -127,6 +127,7 @@ struct rxrpc_call *rxrpc_alloc_call(gfp_t gfp)
rwlock_init(&call->state_lock);
atomic_set(&call->usage, 1);
call->debug_id = atomic_inc_return(&rxrpc_debug_id);
+ call->tx_total_len = -1;
memset(&call->sock_node, 0xed, sizeof(call->sock_node));
@@ -201,6 +202,7 @@ struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx,
struct rxrpc_conn_parameters *cp,
struct sockaddr_rxrpc *srx,
unsigned long user_call_ID,
+ s64 tx_total_len,
gfp_t gfp)
__releases(&rx->sk.sk_lock.slock)
{
@@ -219,6 +221,7 @@ struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx,
return call;
}
+ call->tx_total_len = tx_total_len;
trace_rxrpc_call(call, rxrpc_call_new_client, atomic_read(&call->usage),
here, (const void *)user_call_ID);
diff --git a/net/rxrpc/sendmsg.c b/net/rxrpc/sendmsg.c
index 5a4801e7f560..2e636a525a65 100644
--- a/net/rxrpc/sendmsg.c
+++ b/net/rxrpc/sendmsg.c
@@ -28,6 +28,15 @@ enum rxrpc_command {
RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */
};
+struct rxrpc_send_params {
+ s64 tx_total_len; /* Total Tx data length (if send data) */
+ unsigned long user_call_ID; /* User's call ID */
+ u32 abort_code; /* Abort code to Tx (if abort) */
+ enum rxrpc_command command : 8; /* The command to implement */
+ bool exclusive; /* Shared or exclusive call */
+ bool upgrade; /* If the connection is upgradeable */
+};
+
/*
* wait for space to appear in the transmit/ACK window
* - caller holds the socket locked
@@ -199,6 +208,13 @@ static int rxrpc_send_data(struct rxrpc_sock *rx,
more = msg->msg_flags & MSG_MORE;
+ if (call->tx_total_len != -1) {
+ if (len > call->tx_total_len)
+ return -EMSGSIZE;
+ if (!more && len != call->tx_total_len)
+ return -EMSGSIZE;
+ }
+
skb = call->tx_pending;
call->tx_pending = NULL;
rxrpc_see_skb(skb, rxrpc_skb_tx_seen);
@@ -291,6 +307,8 @@ static int rxrpc_send_data(struct rxrpc_sock *rx,
sp->remain -= copy;
skb->mark += copy;
copied += copy;
+ if (call->tx_total_len != -1)
+ call->tx_total_len -= copy;
}
/* check for the far side aborting the call or a network error
@@ -362,19 +380,12 @@ efault:
/*
* extract control messages from the sendmsg() control buffer
*/
-static int rxrpc_sendmsg_cmsg(struct msghdr *msg,
- unsigned long *user_call_ID,
- enum rxrpc_command *command,
- u32 *abort_code,
- bool *_exclusive,
- bool *_upgrade)
+static int rxrpc_sendmsg_cmsg(struct msghdr *msg, struct rxrpc_send_params *p)
{
struct cmsghdr *cmsg;
bool got_user_ID = false;
int len;
- *command = RXRPC_CMD_SEND_DATA;
-
if (msg->msg_controllen == 0)
return -EINVAL;
@@ -394,49 +405,55 @@ static int rxrpc_sendmsg_cmsg(struct msghdr *msg,
if (msg->msg_flags & MSG_CMSG_COMPAT) {
if (len != sizeof(u32))
return -EINVAL;
- *user_call_ID = *(u32 *) CMSG_DATA(cmsg);
+ p->user_call_ID = *(u32 *)CMSG_DATA(cmsg);
} else {
if (len != sizeof(unsigned long))
return -EINVAL;
- *user_call_ID = *(unsigned long *)
+ p->user_call_ID = *(unsigned long *)
CMSG_DATA(cmsg);
}
- _debug("User Call ID %lx", *user_call_ID);
got_user_ID = true;
break;
case RXRPC_ABORT:
- if (*command != RXRPC_CMD_SEND_DATA)
+ if (p->command != RXRPC_CMD_SEND_DATA)
return -EINVAL;
- *command = RXRPC_CMD_SEND_ABORT;
- if (len != sizeof(*abort_code))
+ p->command = RXRPC_CMD_SEND_ABORT;
+ if (len != sizeof(p->abort_code))
return -EINVAL;
- *abort_code = *(unsigned int *) CMSG_DATA(cmsg);
- _debug("Abort %x", *abort_code);
- if (*abort_code == 0)
+ p->abort_code = *(unsigned int *)CMSG_DATA(cmsg);
+ if (p->abort_code == 0)
return -EINVAL;
break;
case RXRPC_ACCEPT:
- if (*command != RXRPC_CMD_SEND_DATA)
+ if (p->command != RXRPC_CMD_SEND_DATA)
return -EINVAL;
- *command = RXRPC_CMD_ACCEPT;
+ p->command = RXRPC_CMD_ACCEPT;
if (len != 0)
return -EINVAL;
break;
case RXRPC_EXCLUSIVE_CALL:
- *_exclusive = true;
+ p->exclusive = true;
if (len != 0)
return -EINVAL;
break;
case RXRPC_UPGRADE_SERVICE:
- *_upgrade = true;
+ p->upgrade = true;
if (len != 0)
return -EINVAL;
break;
+ case RXRPC_TX_LENGTH:
+ if (p->tx_total_len != -1 || len != sizeof(__s64))
+ return -EINVAL;
+ p->tx_total_len = *(__s64 *)CMSG_DATA(cmsg);
+ if (p->tx_total_len < 0)
+ return -EINVAL;
+ break;
+
default:
return -EINVAL;
}
@@ -444,6 +461,8 @@ static int rxrpc_sendmsg_cmsg(struct msghdr *msg,
if (!got_user_ID)
return -EINVAL;
+ if (p->tx_total_len != -1 && p->command != RXRPC_CMD_SEND_DATA)
+ return -EINVAL;
_leave(" = 0");
return 0;
}
@@ -455,8 +474,7 @@ static int rxrpc_sendmsg_cmsg(struct msghdr *msg,
*/
static struct rxrpc_call *
rxrpc_new_client_call_for_sendmsg(struct rxrpc_sock *rx, struct msghdr *msg,
- unsigned long user_call_ID, bool exclusive,
- bool upgrade)
+ struct rxrpc_send_params *p)
__releases(&rx->sk.sk_lock.slock)
{
struct rxrpc_conn_parameters cp;
@@ -480,10 +498,11 @@ rxrpc_new_client_call_for_sendmsg(struct rxrpc_sock *rx, struct msghdr *msg,
cp.local = rx->local;
cp.key = rx->key;
cp.security_level = rx->min_sec_level;
- cp.exclusive = rx->exclusive | exclusive;
- cp.upgrade = upgrade;
+ cp.exclusive = rx->exclusive | p->exclusive;
+ cp.upgrade = p->upgrade;
cp.service_id = srx->srx_service;
- call = rxrpc_new_client_call(rx, &cp, srx, user_call_ID, GFP_KERNEL);
+ call = rxrpc_new_client_call(rx, &cp, srx, p->user_call_ID,
+ p->tx_total_len, GFP_KERNEL);
/* The socket is now unlocked */
_leave(" = %p\n", call);
@@ -499,26 +518,29 @@ int rxrpc_do_sendmsg(struct rxrpc_sock *rx, struct msghdr *msg, size_t len)
__releases(&rx->sk.sk_lock.slock)
{
enum rxrpc_call_state state;
- enum rxrpc_command cmd;
struct rxrpc_call *call;
- unsigned long user_call_ID = 0;
- bool exclusive = false;
- bool upgrade = true;
- u32 abort_code = 0;
int ret;
+ struct rxrpc_send_params p = {
+ .tx_total_len = -1,
+ .user_call_ID = 0,
+ .abort_code = 0,
+ .command = RXRPC_CMD_SEND_DATA,
+ .exclusive = false,
+ .upgrade = true,
+ };
+
_enter("");
- ret = rxrpc_sendmsg_cmsg(msg, &user_call_ID, &cmd, &abort_code,
- &exclusive, &upgrade);
+ ret = rxrpc_sendmsg_cmsg(msg, &p);
if (ret < 0)
goto error_release_sock;
- if (cmd == RXRPC_CMD_ACCEPT) {
+ if (p.command == RXRPC_CMD_ACCEPT) {
ret = -EINVAL;
if (rx->sk.sk_state != RXRPC_SERVER_LISTENING)
goto error_release_sock;
- call = rxrpc_accept_call(rx, user_call_ID, NULL);
+ call = rxrpc_accept_call(rx, p.user_call_ID, NULL);
/* The socket is now unlocked. */
if (IS_ERR(call))
return PTR_ERR(call);
@@ -526,13 +548,12 @@ int rxrpc_do_sendmsg(struct rxrpc_sock *rx, struct msghdr *msg, size_t len)
return 0;
}
- call = rxrpc_find_call_by_user_ID(rx, user_call_ID);
+ call = rxrpc_find_call_by_user_ID(rx, p.user_call_ID);
if (!call) {
ret = -EBADSLT;
- if (cmd != RXRPC_CMD_SEND_DATA)
+ if (p.command != RXRPC_CMD_SEND_DATA)
goto error_release_sock;
- call = rxrpc_new_client_call_for_sendmsg(rx, msg, user_call_ID,
- exclusive, upgrade);
+ call = rxrpc_new_client_call_for_sendmsg(rx, msg, &p);
/* The socket is now unlocked... */
if (IS_ERR(call))
return PTR_ERR(call);
@@ -556,6 +577,15 @@ int rxrpc_do_sendmsg(struct rxrpc_sock *rx, struct msghdr *msg, size_t len)
ret = -ERESTARTSYS;
goto error_put;
}
+
+ if (p.tx_total_len != -1) {
+ ret = -EINVAL;
+ if (call->tx_total_len != -1 ||
+ call->tx_pending ||
+ call->tx_top != 0)
+ goto error_put;
+ call->tx_total_len = p.tx_total_len;
+ }
}
state = READ_ONCE(call->state);
@@ -565,11 +595,11 @@ int rxrpc_do_sendmsg(struct rxrpc_sock *rx, struct msghdr *msg, size_t len)
if (state >= RXRPC_CALL_COMPLETE) {
/* it's too late for this call */
ret = -ESHUTDOWN;
- } else if (cmd == RXRPC_CMD_SEND_ABORT) {
+ } else if (p.command == RXRPC_CMD_SEND_ABORT) {
ret = 0;
- if (rxrpc_abort_call("CMD", call, 0, abort_code, -ECONNABORTED))
+ if (rxrpc_abort_call("CMD", call, 0, p.abort_code, -ECONNABORTED))
ret = rxrpc_send_abort_packet(call);
- } else if (cmd != RXRPC_CMD_SEND_DATA) {
+ } else if (p.command != RXRPC_CMD_SEND_DATA) {
ret = -EINVAL;
} else if (rxrpc_is_client_call(call) &&
state != RXRPC_CALL_CLIENT_SEND_REQUEST) {
@@ -673,5 +703,24 @@ bool rxrpc_kernel_abort_call(struct socket *sock, struct rxrpc_call *call,
mutex_unlock(&call->user_mutex);
return aborted;
}
-
EXPORT_SYMBOL(rxrpc_kernel_abort_call);
+
+/**
+ * rxrpc_kernel_set_tx_length - Set the total Tx length on a call
+ * @sock: The socket the call is on
+ * @call: The call to be informed
+ * @tx_total_len: The amount of data to be transmitted for this call
+ *
+ * Allow a kernel service to set the total transmit length on a call. This
+ * allows buffer-to-packet encrypt-and-copy to be performed.
+ *
+ * This function is primarily for use for setting the reply length since the
+ * request length can be set when beginning the call.
+ */
+void rxrpc_kernel_set_tx_length(struct socket *sock, struct rxrpc_call *call,
+ s64 tx_total_len)
+{
+ WARN_ON(call->tx_total_len != -1);
+ call->tx_total_len = tx_total_len;
+}
+EXPORT_SYMBOL(rxrpc_kernel_set_tx_length);
generated by cgit v1.2.3 (git 2.39.0) at 2024-09-07 22:56:17 +0300