VSOCK utility functions for Linux VSocket module.
Signed-off-by: George Zhang <georgezh...@vmware.com>
---
net/vmw_vsock/util.c | 626 ++++++++++++++++++++++++++++++++++++++++++++++++++
net/vmw_vsock/util.h | 312 +++++++++++++++++++++++++
2 files changed, 938 insertions(+), 0 deletions(-)
create mode 100644 net/vmw_vsock/util.c
create mode 100644 net/vmw_vsock/util.h
diff --git a/net/vmw_vsock/util.c b/net/vmw_vsock/util.c
new file mode 100644
index 0000000..1c42b23
--- /dev/null
+++ b/net/vmw_vsock/util.c
@@ -0,0 +1,626 @@
+/*
+ * VMware vSockets Driver
+ *
+ * Copyright (C) 2007-2012 VMware, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation version 2 and no later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+/*
+ * util.c --
+ *
+ * Utility functions for Linux VSocket module.
+ */
+
+#include <linux/types.h>
+#include <linux/list.h>
+#include <linux/socket.h>
+#include <linux/stddef.h> /* for NULL */
+#include <net/sock.h>
+
+#include "af_vsock.h"
+#include "util.h"
+
+struct list_head vsock_bind_table[VSOCK_HASH_SIZE + 1];
+struct list_head vsock_connected_table[VSOCK_HASH_SIZE];
+
+DEFINE_SPINLOCK(vsock_table_lock);
+
+/*
+ *
+ * vsock_vmci_log_pkt --
+ *
+ * Logs the provided packet.
+ *
+ * Results: None.
+ *
+ * Side effects: None.
+ */
+
+void vsock_vmci_log_pkt(char const *function, u32 line, vsock_packet *pkt)
+{
+ char buf[256];
+ char *cur = buf;
+ int left = sizeof buf;
+ int written = 0;
+ char *type_strings[] = {
+ [VSOCK_PACKET_TYPE_INVALID] = "INVALID",
+ [VSOCK_PACKET_TYPE_REQUEST] = "REQUEST",
+ [VSOCK_PACKET_TYPE_NEGOTIATE] = "NEGOTIATE",
+ [VSOCK_PACKET_TYPE_OFFER] = "OFFER",
+ [VSOCK_PACKET_TYPE_ATTACH] = "ATTACH",
+ [VSOCK_PACKET_TYPE_WROTE] = "WROTE",
+ [VSOCK_PACKET_TYPE_READ] = "READ",
+ [VSOCK_PACKET_TYPE_RST] = "RST",
+ [VSOCK_PACKET_TYPE_SHUTDOWN] = "SHUTDOWN",
+ [VSOCK_PACKET_TYPE_WAITING_WRITE] = "WAITING_WRITE",
+ [VSOCK_PACKET_TYPE_WAITING_READ] = "WAITING_READ",
+ [VSOCK_PACKET_TYPE_REQUEST2] = "REQUEST2",
+ [VSOCK_PACKET_TYPE_NEGOTIATE2] = "NEGOTIATE2",
+ };
+
+ written = snprintf(cur, left, "PKT: %u:%u -> %u:%u",
+ VMCI_HANDLE_TO_CONTEXT_ID(pkt->dg.src),
+ pkt->src_port,
+ VMCI_HANDLE_TO_CONTEXT_ID(pkt->dg.dst),
+ pkt->dst_port);
+ if (written >= left)
+ goto error;
+
+ left -= written;
+ cur += written;
+
+ switch (pkt->type) {
+ case VSOCK_PACKET_TYPE_REQUEST:
+ case VSOCK_PACKET_TYPE_NEGOTIATE:
+ written = snprintf(cur, left, ", %s, size = %" FMT64 "u",
+ type_strings[pkt->type], pkt->u.size);
+ break;
+
+ case VSOCK_PACKET_TYPE_OFFER:
+ case VSOCK_PACKET_TYPE_ATTACH:
+ written = snprintf(cur, left, ", %s, handle = %u:%u",
+ type_strings[pkt->type],
+ VMCI_HANDLE_TO_CONTEXT_ID(pkt->u.handle),
+ VMCI_HANDLE_TO_RESOURCE_ID(pkt->u.handle));
+ break;
+
+ case VSOCK_PACKET_TYPE_WROTE:
+ case VSOCK_PACKET_TYPE_READ:
+ case VSOCK_PACKET_TYPE_RST:
+ written = snprintf(cur, left, ", %s", type_strings[pkt->type]);
+ break;
+ case VSOCK_PACKET_TYPE_SHUTDOWN: {
+ bool recv;
+ bool send;
+
+ recv = pkt->u.mode & RCV_SHUTDOWN;
+ send = pkt->u.mode & SEND_SHUTDOWN;
+ written = snprintf(cur, left, ", %s, mode = %c%c",
+ type_strings[pkt->type],
+ recv ? 'R' : ' ', send ? 'S' : ' ');
+ }
+ break;
+
+ case VSOCK_PACKET_TYPE_WAITING_WRITE:
+ case VSOCK_PACKET_TYPE_WAITING_READ:
+ written = snprintf(cur, left, ", %s, generation = %" FMT64 "u, "
+ "offset = %" FMT64 "u",
+ type_strings[pkt->type],
+ pkt->u.wait.generation, pkt->u.wait.offset);
+
+ break;
+
+ case VSOCK_PACKET_TYPE_REQUEST2:
+ case VSOCK_PACKET_TYPE_NEGOTIATE2:
+ written = snprintf(cur, left, ", %s, size = %" FMT64 "u, "
+ "proto = %u",
+ type_strings[pkt->type], pkt->u.size,
+ pkt->proto);
+ break;
+
+ default:
+ written = snprintf(cur, left, ", unrecognized type");
+ }
+
+ if (written >= left)
+ goto error;
+
+ left -= written;
+ cur += written;
+
+ written = snprintf(cur, left, " [%s:%u]\n", function, line);
+ if (written >= left)
+ goto error;
+
+ return;
+
+error:
+ pr_err("could not log packet\n");
+}
+
+/*
+ *
+ * vsock_vmci_init_tables --
+ *
+ * Initializes the tables used for socket lookup.
+ *
+ * Results: None.
+ *
+ * Side effects: None.
+ */
+
+void vsock_vmci_init_tables(void)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(vsock_bind_table); i++)
+ INIT_LIST_HEAD(&vsock_bind_table[i]);
+
+ for (i = 0; i < ARRAY_SIZE(vsock_connected_table); i++)
+ INIT_LIST_HEAD(&vsock_connected_table[i]);
+}
+
+/*
+ *
+ * __vsock_vmci_insert_bound --
+ *
+ * Inserts socket into the bound table.
+ *
+ * Note that this assumes any necessary locks are held.
+ *
+ * Results: None.
+ *
+ * Side effects: The reference count for sk is incremented.
+ */
+
+void __vsock_vmci_insert_bound(struct list_head *list, struct sock *sk)
+{
+ vsock_vmci_sock *vsk = vsock_sk(sk);
+
+ sock_hold(sk);
+ list_add(&vsk->bound_table, list);
+}
+
+/*
+ *
+ * __vsock_vmci_insert_connected --
+ *
+ * Inserts socket into the connected table.
+ *
+ * Note that this assumes any necessary locks are held.
+ *
+ * Results: None.
+ *
+ * Side effects: The reference count for sk is incremented.
+ */
+
+void __vsock_vmci_insert_connected(struct list_head *list, struct sock *sk)
+{
+ vsock_vmci_sock *vsk = vsock_sk(sk);
+
+ sock_hold(sk);
+ list_add(&vsk->connected_table, list);
+}
+
+/*
+ *
+ * __vsock_vmci_remove_bound --
+ *
+ * Removes socket from the bound table.
+ *
+ * Note that this assumes any necessary locks are held.
+ *
+ * Results: None.
+ *
+ * Side effects: The reference count for sk is decremented.
+ */
+
+void __vsock_vmci_remove_bound(struct sock *sk)
+{
+ vsock_vmci_sock *vsk;
+
+ ASSERT(__vsock_vmci_in_bound_table(sk));
+
+ vsk = vsock_sk(sk);
+
+ list_del_init(&vsk->bound_table);
+ sock_put(sk);
+}
+
+/*
+ *
+ * __vsock_vmci_remove_connected --
+ *
+ * Removes socket from the connected table.
+ *
+ * Note that this assumes any necessary locks are held.
+ *
+ * Results: None.
+ *
+ * Side effects: The reference count for sk is decremented.
+ */
+
+void __vsock_vmci_remove_connected(struct sock *sk)
+{
+ vsock_vmci_sock *vsk;
+
+ ASSERT(__vsock_vmci_in_connected_table(sk));
+
+ vsk = vsock_sk(sk);
+
+ list_del_init(&vsk->connected_table);
+ sock_put(sk);
+}
+
+/*
+ *
+ * __vsock_vmci_find_bound_socket --
+ *
+ * Finds the socket corresponding to the provided address in the bound sockets
+ * hash table.
+ *
+ * Note that this assumes any necessary locks are held.
+ *
+ * Results: The sock structure if found, NULL if not found.
+ *
+ * Side effects: None.
+ */
+
+struct sock *__vsock_vmci_find_bound_socket(struct sockaddr_vm *addr)
+{
+ vsock_vmci_sock *vsk;
+
+ list_for_each_entry(vsk, vsock_bound_sockets(addr), bound_table) {
+ if (vsock_addr_equals_addr_any(addr, &vsk->local_addr)) {
+ return sk_vsock(vsk);
+ }
+ }
+
+ return NULL;
+}
+
+/*
+ *
+ * __vsock_vmci_find_connected_socket --
+ *
+ * Finds the socket corresponding to the provided addresses in the connected
+ * sockets hash table.
+ *
+ * Note that this assumes any necessary locks are held.
+ *
+ * Results: The sock structure if found, NULL if not found.
+ *
+ * Side effects: None.
+ */
+
+struct sock *__vsock_vmci_find_connected_socket(struct sockaddr_vm *src,
+ struct sockaddr_vm *dst)
+{
+ vsock_vmci_sock *vsk;
+
+ list_for_each_entry(vsk, vsock_connected_sockets(src, dst),
+ connected_table) {
+ if (vsock_addr_equals_addr(src, &vsk->remote_addr)
+ && vsock_addr_equals_addr(dst, &vsk->local_addr)) {
+ return sk_vsock(vsk);
+ }
+ }
+
+ return NULL;
+}
+
+/*
+ *
+ * __vsock_vmci_in_bound_table --
+ *
+ * Determines whether the provided socket is in the bound table.
+ *
+ * Results: TRUE is socket is in bound table, FALSE otherwise.
+ *
+ * Side effects: None.
+ */
+
+bool __vsock_vmci_in_bound_table(struct sock *sk)
+{
+ vsock_vmci_sock *vsk = vsock_sk(sk);
+
+ return !list_empty(&vsk->bound_table);
+}
+
+/*
+ *
+ * __vsock_vmci_in_connected_table --
+ *
+ * Determines whether the provided socket is in the connected table.
+ *
+ * Results: TRUE is socket is in connected table, FALSE otherwise.
+ *
+ * Side effects: None.
+ */
+
+bool __vsock_vmci_in_connected_table(struct sock *sk)
+{
+ vsock_vmci_sock *vsk = vsock_sk(sk);
+
+ return !list_empty(&vsk->connected_table);
+}
+
+/*
+ *
+ * vsock_vmci_get_pending --
+ *
+ * Retrieves a pending connection that matches the addresses specified in the
+ * provided packet.
+ *
+ * Assumes the socket lock is held for listener.
+ *
+ * Results: Socket of the pending connection on success, NULL if not found.
+ *
+ * Side effects: A reference is held on the socket until the release function
+ * is called.
+ */
+
+struct sock *vsock_vmci_get_pending(struct sock *listener, vsock_packet *pkt)
+{
+ vsock_vmci_sock *vlistener;
+ vsock_vmci_sock *vpending;
+ struct sock *pending;
+
+ vlistener = vsock_sk(listener);
+
+ list_for_each_entry(vpending, &vlistener->pending_links,
+ pending_links) {
+ struct sockaddr_vm src;
+ struct sockaddr_vm dst;
+
+ vsock_addr_init(&src, VMCI_HANDLE_TO_CONTEXT_ID(pkt->dg.src),
+ pkt->src_port);
+ vsock_addr_init(&dst, VMCI_HANDLE_TO_CONTEXT_ID(pkt->dg.dst),
+ pkt->dst_port);
+
+ if (vsock_addr_equals_addr(&src, &vpending->remote_addr) &&
+ vsock_addr_equals_addr(&dst, &vpending->local_addr)) {
+ pending = sk_vsock(vpending);
+ sock_hold(pending);
+ goto found;
+ }
+ }
+
+ pending = NULL;
+found:
+ return pending;
+
+}
+
+/*
+ *
+ * vsock_vmci_release_pending --
+ *
+ * Releases the reference on a socket previously obtained by a call to
+ * vsock_vmci_get_pending().
+ *
+ * Results: None.
+ *
+ * Side effects: The socket may be freed if this was the last reference.
+ */
+
+void vsock_vmci_release_pending(struct sock *pending)
+{
+ sock_put(pending);
+}
+
+/*
+ *
+ * vsock_vmci_add_pending --
+ *
+ * Adds a pending connection on listener's pending list.
+ *
+ * Assumes the socket lock is held for listener. Assumes the socket lock is
+ * held for pending.
+ *
+ * Results: None.
+ *
+ * Side effects: The reference count of the sockets is incremented.
+ */
+
+void vsock_vmci_add_pending(struct sock *listener, struct sock *pending)
+{
+ vsock_vmci_sock *vlistener;
+ vsock_vmci_sock *vpending;
+
+ vlistener = vsock_sk(listener);
+ vpending = vsock_sk(pending);
+
+ sock_hold(pending);
+ sock_hold(listener);
+ list_add_tail(&vpending->pending_links, &vlistener->pending_links);
+}
+
+/*
+ *
+ * vsock_vmci_remove_pending --
+ *
+ * Removes a pending connection from the listener's pending list.
+ *
+ * Assumes the socket lock is held for listener. Assumes the socket lock is
+ * held for pending.
+ *
+ * Results: None.
+ *
+ * Side effects: The reference count of the sockets is decremented.
+ */
+
+void vsock_vmci_remove_pending(struct sock *listener, struct sock *pending)
+{
+ vsock_vmci_sock *vpending = vsock_sk(pending);
+
+ list_del_init(&vpending->pending_links);
+ sock_put(listener);
+ sock_put(pending);
+}
+
+/*
+ *
+ * vsock_vmci_enqueue_accept --
+ *
+ * Enqueues the connected socket on the listening socket's accepting queue.
+ *
+ * Assumes the socket lock is held for listener. Assumes the socket lock is
+ * held for connected.
+ *
+ * Results: None.
+ *
+ * Side effects: The sockets' reference counts are incremented.
+ */
+
+void vsock_vmci_enqueue_accept(struct sock *listener, struct sock *connected)
+{
+ vsock_vmci_sock *vlistener;
+ vsock_vmci_sock *vconnected;
+
+ vlistener = vsock_sk(listener);
+ vconnected = vsock_sk(connected);
+
+ sock_hold(connected);
+ sock_hold(listener);
+ list_add_tail(&vconnected->accept_queue, &vlistener->accept_queue);
+}
+
+/*
+ *
+ * vsock_vmci_dequeue_accept --
+ *
+ * Dequeues the next connected socket from the listening socket's accept queue.
+ *
+ * Assumes the socket lock is held for listener.
+ *
+ * Note that the caller must call sock_put() on the returned socket once it is
+ * done with the socket.
+ *
+ * Results: The next socket from the queue, or NULL if the queue is empty.
+ *
+ * Side effects: The reference count of the listener is decremented.
+ */
+
+struct sock *vsock_vmci_dequeue_accept(struct sock *listener)
+{
+ vsock_vmci_sock *vlistener;
+ vsock_vmci_sock *vconnected;
+
+ vlistener = vsock_sk(listener);
+
+ if (list_empty(&vlistener->accept_queue))
+ return NULL;
+
+ vconnected = list_entry(vlistener->accept_queue.next,
+ vsock_vmci_sock, accept_queue);
+ ASSERT(vconnected);
+
+ list_del_init(&vconnected->accept_queue);
+ sock_put(listener);
+ /*
+ * The caller will need a reference on the connected socket so we let
+ * it call sock_put().
+ */
+
+ ASSERT(sk_vsock(vconnected));
+ return sk_vsock(vconnected);
+}
+
+/*
+ *
+ * vsock_vmci_remove_accept --
+ *
+ * Removes a socket from the accept queue of a listening socket.
+ *
+ * Assumes the socket lock is held for listener. Assumes the socket lock is
+ * held for connected.
+ *
+ * Results: None.
+ *
+ * Side effects: The sockets' reference counts are decremented.
+ */
+
+void vsock_vmci_remove_accept(struct sock *listener, struct sock *connected)
+{
+ vsock_vmci_sock *vconnected;
+
+ if (!vsock_vmci_in_accept_queue(connected))
+ return;
+
+ vconnected = vsock_sk(connected);
+ ASSERT(vconnected->listener == listener);
+
+ list_del_init(&vconnected->accept_queue);
+ sock_put(listener);
+ sock_put(connected);
+}
+
+/*
+ *
+ * vsock_vmci_in_accept_queue --
+ *
+ * Determines whether a socket is on an accept queue.
+ *
+ * Assumes the socket lock is held for sk.
+ *
+ * Results: TRUE if the socket is in an accept queue, FALSE otherwise.
+ *
+ * Side effects: None.
+ */
+
+bool vsock_vmci_in_accept_queue(struct sock *sk)
+{
+ /*
+ * If our accept queue isn't empty, it means we're linked into some
+ * listener socket's accept queue.
+ */
+ return !vsock_vmci_is_accept_queue_empty(sk);
+}
+
+/*
+ *
+ * vsock_vmci_is_accept_queue_empty --
+ *
+ * Determines whether the provided socket's accept queue is empty.
+ *
+ * Assumes the socket lock is held for sk.
+ *
+ * Results: TRUE if the socket's accept queue is empty, FALSE otherwsise.
+ *
+ * Side effects: None.
+ *
+ */
+
+bool vsock_vmci_is_accept_queue_empty(struct sock *sk)
+{
+ vsock_vmci_sock *vsk = vsock_sk(sk);
+ return list_empty(&vsk->accept_queue);
+}
+
+/*
+ *
+ * vsock_vmci_is_pending --
+ *
+ * Determines whether a socket is pending.
+ *
+ * Assumes the socket lock is held for sk.
+ *
+ * Results: TRUE if the socket is pending, FALSE otherwise.
+ *
+ * Side effects: None.
+ */
+
+bool vsock_vmci_is_pending(struct sock *sk)
+{
+ vsock_vmci_sock *vsk = vsock_sk(sk);
+ return !list_empty(&vsk->pending_links);
+}
diff --git a/net/vmw_vsock/util.h b/net/vmw_vsock/util.h
new file mode 100644
index 0000000..50ed6c8
--- /dev/null
+++ b/net/vmw_vsock/util.h
@@ -0,0 +1,312 @@
+/*
+ * VMware vSockets Driver
+ *
+ * Copyright (C) 2007-2012 VMware, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation version 2 and no later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+/*
+ * util.h --
+ *
+ * Utility functions for Linux VSocket module.
+ */
+
+#ifndef __UTIL_H__
+#define __UTIL_H__
+
+#include <linux/types.h>
+#include <linux/stddef.h> /* for NULL */
+#include <net/sock.h>
+#include <linux/spinlock.h>
+
+#include "vsock_common.h"
+#include "vsock_packet.h"
+
+/*
+ * Each bound VSocket is stored in the bind hash table and each connected
+ * VSocket is stored in the connected hash table.
+ *
+ * Unbound sockets are all put on the same list attached to the end of the hash
+ * table (vsock_unbound_sockets). Bound sockets are added to the hash table in
+ * the bucket that their local address hashes to (vsock_bound_sockets(addr)
+ * represents the list that addr hashes to).
+ *
+ * Specifically, we initialize the vsock_bind_table array to a size of
+ * VSOCK_HASH_SIZE + 1 so that vsock_bind_table[0] through
+ * vsock_bind_table[VSOCK_HASH_SIZE - 1] are for bound sockets and
+ * vsock_bind_table[VSOCK_HASH_SIZE] is for unbound sockets. The hash function
+ * mods with VSOCK_HASH_SIZE - 1 to ensure this.
+ */
+#define VSOCK_HASH_SIZE 251
+#define LAST_RESERVED_PORT 1023
+#define MAX_PORT_RETRIES 24
+
+extern struct list_head vsock_bind_table[VSOCK_HASH_SIZE + 1];
+extern struct list_head vsock_connected_table[VSOCK_HASH_SIZE];
+
+extern spinlock_t vsock_table_lock;
+
+#define VSOCK_HASH(addr) ((addr)->svm_port % (VSOCK_HASH_SIZE - 1))
+#define vsock_bound_sockets(addr) (&vsock_bind_table[VSOCK_HASH(addr)])
+#define vsock_unbound_sockets (&vsock_bind_table[VSOCK_HASH_SIZE])
+
+/* XXX This can probably be implemented in a better way. */
+#define VSOCK_CONN_HASH(src, dst) \
+ (((src)->svm_cid ^ (dst)->svm_port) % (VSOCK_HASH_SIZE - 1))
+#define vsock_connected_sockets(src, dst) \
+ (&vsock_connected_table[VSOCK_CONN_HASH(src, dst)])
+#define vsock_connected_sockets_vsk(vsk) \
+ vsock_connected_sockets(&(vsk)->remote_addr, &(vsk)->local_addr)
+
+/*
+ * Prototypes.
+ */
+
+void vsock_vmci_log_pkt(char const *function, u32 line, vsock_packet *pkt);
+
+void vsock_vmci_init_tables(void);
+void __vsock_vmci_insert_bound(struct list_head *list, struct sock *sk);
+void __vsock_vmci_insert_connected(struct list_head *list, struct sock *sk);
+void __vsock_vmci_remove_bound(struct sock *sk);
+void __vsock_vmci_remove_connected(struct sock *sk);
+struct sock *__vsock_vmci_find_bound_socket(struct sockaddr_vm *addr);
+struct sock *__vsock_vmci_find_connected_socket(struct sockaddr_vm *src,
+ struct sockaddr_vm *dst);
+bool __vsock_vmci_in_bound_table(struct sock *sk);
+bool __vsock_vmci_in_connected_table(struct sock *sk);
+
+struct sock *vsock_vmci_get_pending(struct sock *listener, vsock_packet *pkt);
+void vsock_vmci_release_pending(struct sock *pending);
+void vsock_vmci_add_pending(struct sock *listener, struct sock *pending);
+void vsock_vmci_remove_pending(struct sock *listener, struct sock *pending);
+void vsock_vmci_enqueue_accept(struct sock *listener, struct sock *connected);
+struct sock *vsock_vmci_dequeue_accept(struct sock *listener);
+void vsock_vmci_remove_accept(struct sock *listener, struct sock *connected);
+bool vsock_vmci_in_accept_queue(struct sock *sk);
+bool vsock_vmci_is_accept_queue_empty(struct sock *sk);
+bool vsock_vmci_is_pending(struct sock *sk);
+
+static inline void vsock_vmci_insert_bound(struct list_head *list,
+ struct sock *sk);
+static inline void vsock_vmci_insert_connected(struct list_head *list,
+ struct sock *sk);
+static inline void vsock_vmci_remove_bound(struct sock *sk);
+static inline void vsock_vmci_remove_connected(struct sock *sk);
+static inline struct sock *vsock_vmci_find_bound_socket(struct sockaddr_vm
+ *addr);
+static inline struct sock *vsock_vmci_find_connected_socket(struct sockaddr_vm
+ *src,
+ struct sockaddr_vm
+ *dst);
+static inline bool vsock_vmci_in_bound_table(struct sock *sk);
+static inline bool vsock_vmci_in_connected_table(struct sock *sk);
+
+/*
+ *
+ * vsock_vmci_insert_bound --
+ *
+ * Inserts socket into the bound table.
+ *
+ * Note that it is important to invoke the bottom-half versions of the spinlock
+ * functions since these may be called from tasklets.
+ *
+ * Results: None.
+ *
+ * Side effects: vsock_table_lock is acquired and released.
+ */
+
+static inline void
+vsock_vmci_insert_bound(struct list_head *list, struct sock *sk)
+{
+ spin_lock_bh(&vsock_table_lock);
+ __vsock_vmci_insert_bound(list, sk);
+ spin_unlock_bh(&vsock_table_lock);
+}
+
+/*
+ *
+ * vsock_vmci_insert_connected --
+ *
+ * Inserts socket into the connected table.
+ *
+ * Note that it is important to invoke the bottom-half versions of the spinlock
+ * functions since these may be called from tasklets.
+ *
+ * Results: None.
+ *
+ * Side effects: vsock_table_lock is acquired and released.
+ */
+
+static inline void
+vsock_vmci_insert_connected(struct list_head *list, struct sock *sk)
+{
+ spin_lock_bh(&vsock_table_lock);
+ __vsock_vmci_insert_connected(list, sk);
+ spin_unlock_bh(&vsock_table_lock);
+}
+
+/*
+ *
+ * vsock_vmci_remove_bound --
+ *
+ * Removes socket from the bound list.
+ *
+ * Note that it is important to invoke the bottom-half versions of the spinlock
+ * functions since these may be called from tasklets.
+ *
+ * Results: None.
+ *
+ * Side effects: vsock_table_lock is acquired and released.
+ */
+
+static inline void vsock_vmci_remove_bound(struct sock *sk)
+{
+ spin_lock_bh(&vsock_table_lock);
+ __vsock_vmci_remove_bound(sk);
+ spin_unlock_bh(&vsock_table_lock);
+}
+
+/*
+ *
+ * vsock_vmci_remove_connected --
+ *
+ * Removes socket from the connected list.
+ *
+ * Note that it is important to invoke the bottom-half versions of the spinlock
+ * functions since these may be called from tasklets.
+ *
+ * Results: None.
+ *
+ * Side effects: vsock_table_lock is acquired and released.
+ */
+
+static inline void vsock_vmci_remove_connected(struct sock *sk)
+{
+ spin_lock_bh(&vsock_table_lock);
+ __vsock_vmci_remove_connected(sk);
+ spin_unlock_bh(&vsock_table_lock);
+}
+
+/*
+ *
+ * vsock_vmci_find_bound_socket --
+ *
+ * Finds the socket corresponding to the provided address in the bound sockets
+ * hash table.
+ *
+ * Note that it is important to invoke the bottom-half versions of the spinlock
+ * functions since these are called from tasklets.
+ *
+ * Results: The sock structure if found, NULL on failure.
+ *
+ * Side effects: vsock_table_lock is acquired and released. The socket's
+ * reference count is increased.
+ */
+
+static inline struct sock *vsock_vmci_find_bound_socket(struct sockaddr_vm
+ *addr)
+{
+ struct sock *sk;
+
+ spin_lock_bh(&vsock_table_lock);
+ sk = __vsock_vmci_find_bound_socket(addr);
+ if (sk)
+ sock_hold(sk);
+
+ spin_unlock_bh(&vsock_table_lock);
+
+ return sk;
+}
+
+/*
+ *
+ * vsock_vmci_find_connected_socket --
+ *
+ * Finds the socket corresponding to the provided address in the connected
+ * sockets hash table.
+ *
+ * Note that it is important to invoke the bottom-half versions of the spinlock
+ * functions since these are called from tasklets.
+ *
+ * Results: The sock structure if found, NULL on failure.
+ *
+ * Side effects: vsock_table_lock is acquired and released. The socket's
+ * reference count is increased.
+ */
+
+static inline struct sock *vsock_vmci_find_connected_socket(struct sockaddr_vm
+ *src,
+ struct sockaddr_vm
+ *dst)
+{
+ struct sock *sk;
+
+ spin_lock_bh(&vsock_table_lock);
+ sk = __vsock_vmci_find_connected_socket(src, dst);
+ if (sk)
+ sock_hold(sk);
+
+ spin_unlock_bh(&vsock_table_lock);
+
+ return sk;
+}
+
+/*
+ *
+ * vsock_vmci_in_bound_table --
+ *
+ * Determines whether the provided socket is in the bound table.
+ *
+ * Note that it is important to invoke the bottom-half versions of the spinlock
+ * functions since these may be called from tasklets.
+ *
+ * Results: TRUE is socket is in bound table, FALSE otherwise.
+ *
+ * Side effects: vsock_table_lock is acquired and released.
+ */
+
+static inline bool vsock_vmci_in_bound_table(struct sock *sk)
+{
+ bool ret;
+
+ spin_lock_bh(&vsock_table_lock);
+ ret = __vsock_vmci_in_bound_table(sk);
+ spin_unlock_bh(&vsock_table_lock);
+
+ return ret;
+}
+
+/*
+ *
+ * vsock_vmci_in_connected_table --
+ *
+ * Determines whether the provided socket is in the connected table.
+ *
+ * Note that it is important to invoke the bottom-half versions of the spinlock
+ * functions since these may be called from tasklets.
+ *
+ * Results: TRUE is socket is in connected table, FALSE otherwise.
+ *
+ * Side effects: vsock_table_lock is acquired and released.
+ */
+
+static inline bool vsock_vmci_in_connected_table(struct sock *sk)
+{
+ bool ret;
+
+ spin_lock_bh(&vsock_table_lock);
+ ret = __vsock_vmci_in_connected_table(sk);
+ spin_unlock_bh(&vsock_table_lock);
+
+ return ret;
+}
+
+#endif /* __UTIL_H__ */
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
