-/*-
- * BSD LICENSE
- *
- * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2014 Intel Corporation
*/
#include <stdint.h>
#include "fd_man.h"
+
+#define RTE_LOGTYPE_VHOST_FDMAN RTE_LOGTYPE_USER1
+
#define FDPOLLERR (POLLERR | POLLHUP | POLLNVAL)
static int
pfdset->rwfds[dst] = pfdset->rwfds[src];
}
-/*
- * Find deleted fd entries and remove them
- */
static void
-fdset_shrink(struct fdset *pfdset)
+fdset_shrink_nolock(struct fdset *pfdset)
{
int i;
int last_valid_idx = get_last_valid_idx(pfdset, pfdset->num - 1);
- pthread_mutex_lock(&pfdset->fd_mutex);
-
for (i = 0; i < last_valid_idx; i++) {
if (pfdset->fd[i].fd != -1)
continue;
last_valid_idx = get_last_valid_idx(pfdset, last_valid_idx - 1);
}
pfdset->num = last_valid_idx + 1;
+}
+/*
+ * Find deleted fd entries and remove them
+ */
+static void
+fdset_shrink(struct fdset *pfdset)
+{
+ pthread_mutex_lock(&pfdset->fd_mutex);
+ fdset_shrink_nolock(pfdset);
pthread_mutex_unlock(&pfdset->fd_mutex);
}
pthread_mutex_lock(&pfdset->fd_mutex);
i = pfdset->num < MAX_FDS ? pfdset->num++ : -1;
if (i == -1) {
- pthread_mutex_unlock(&pfdset->fd_mutex);
- return -2;
+ fdset_shrink_nolock(pfdset);
+ i = pfdset->num < MAX_FDS ? pfdset->num++ : -1;
+ if (i == -1) {
+ pthread_mutex_unlock(&pfdset->fd_mutex);
+ return -2;
+ }
}
fdset_add_fd(pfdset, i, fd, rcb, wcb, dat);
return dat;
}
+/**
+ * Unregister the fd from the fdset.
+ *
+ * If parameters are invalid, return directly -2.
+ * And check whether fd is busy, if yes, return -1.
+ * Otherwise, try to delete the fd from fdset and
+ * return true.
+ */
+int
+fdset_try_del(struct fdset *pfdset, int fd)
+{
+ int i;
+
+ if (pfdset == NULL || fd == -1)
+ return -2;
+
+ pthread_mutex_lock(&pfdset->fd_mutex);
+ i = fdset_find_fd(pfdset, fd);
+ if (i != -1 && pfdset->fd[i].busy) {
+ pthread_mutex_unlock(&pfdset->fd_mutex);
+ return -1;
+ }
+
+ if (i != -1) {
+ pfdset->fd[i].fd = -1;
+ pfdset->fd[i].rcb = pfdset->fd[i].wcb = NULL;
+ pfdset->fd[i].dat = NULL;
+ }
+
+ pthread_mutex_unlock(&pfdset->fd_mutex);
+ return 0;
+}
/**
* This functions runs in infinite blocking loop until there is no fd in
* will wait until the flag is reset to zero(which indicates the callback is
* finished), then it could free the context after fdset_del.
*/
-void
-fdset_event_dispatch(struct fdset *pfdset)
+void *
+fdset_event_dispatch(void *arg)
{
int i;
struct pollfd *pfd;
int fd, numfds;
int remove1, remove2;
int need_shrink;
+ struct fdset *pfdset = arg;
+ int val;
if (pfdset == NULL)
- return;
+ return NULL;
while (1) {
numfds = pfdset->num;
pthread_mutex_unlock(&pfdset->fd_mutex);
- poll(pfdset->rwfds, numfds, 1000 /* millisecs */);
+ val = poll(pfdset->rwfds, numfds, 1000 /* millisecs */);
+ if (val < 0)
+ continue;
need_shrink = 0;
for (i = 0; i < numfds; i++) {
* because the fd is closed in the cb,
* the old fd val could be reused by when creates new
* listen fd in another thread, we couldn't call
- * fd_set_del.
+ * fdset_del.
*/
if (remove1 || remove2) {
pfdentry->fd = -1;
if (need_shrink)
fdset_shrink(pfdset);
}
+
+ return NULL;
+}
+
+static void
+fdset_pipe_read_cb(int readfd, void *dat __rte_unused,
+ int *remove __rte_unused)
+{
+ char charbuf[16];
+ int r = read(readfd, charbuf, sizeof(charbuf));
+ /*
+ * Just an optimization, we don't care if read() failed
+ * so ignore explicitly its return value to make the
+ * compiler happy
+ */
+ RTE_SET_USED(r);
+}
+
+void
+fdset_pipe_uninit(struct fdset *fdset)
+{
+ fdset_del(fdset, fdset->u.readfd);
+ close(fdset->u.readfd);
+ close(fdset->u.writefd);
+}
+
+int
+fdset_pipe_init(struct fdset *fdset)
+{
+ int ret;
+
+ if (pipe(fdset->u.pipefd) < 0) {
+ RTE_LOG(ERR, VHOST_FDMAN,
+ "failed to create pipe for vhost fdset\n");
+ return -1;
+ }
+
+ ret = fdset_add(fdset, fdset->u.readfd,
+ fdset_pipe_read_cb, NULL, NULL);
+
+ if (ret < 0) {
+ RTE_LOG(ERR, VHOST_FDMAN,
+ "failed to add pipe readfd %d into vhost server fdset\n",
+ fdset->u.readfd);
+
+ fdset_pipe_uninit(fdset);
+ return -1;
+ }
+
+ return 0;
+}
+
+void
+fdset_pipe_notify(struct fdset *fdset)
+{
+ int r = write(fdset->u.writefd, "1", 1);
+ /*
+ * Just an optimization, we don't care if write() failed
+ * so ignore explicitly its return value to make the
+ * compiler happy
+ */
+ RTE_SET_USED(r);
+
}
Code Review / deb_dpdk.git / blobdiff