59317cef24
Currently select() is used to monitor file descriptors for vhostuser ports. This limits the number of ports possible to create since the fd number is used as index in the fd_set and we have seen fds > 1023. This patch changes select() to poll(). This way we can keep an packed (pollfd) array for the fds, e.g. as many fds as the size of the array. Also see: http://dpdk.org/ml/archives/dev/2016-April/037024.html Reported-by: Patrik Andersson <patrik.r.andersson@ericsson.com> Signed-off-by: Jan Wickbom <jan.wickbom@ericsson.com> Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
70 lines
2.5 KiB
C
70 lines
2.5 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _FD_MAN_H_
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#define _FD_MAN_H_
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#include <stdint.h>
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#include <pthread.h>
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#include <poll.h>
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#define MAX_FDS 1024
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typedef void (*fd_cb)(int fd, void *dat, int *remove);
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struct fdentry {
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int fd; /* -1 indicates this entry is empty */
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fd_cb rcb; /* callback when this fd is readable. */
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fd_cb wcb; /* callback when this fd is writeable.*/
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void *dat; /* fd context */
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int busy; /* whether this entry is being used in cb. */
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};
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struct fdset {
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struct pollfd rwfds[MAX_FDS];
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struct fdentry fd[MAX_FDS];
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pthread_mutex_t fd_mutex;
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int num; /* current fd number of this fdset */
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};
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void fdset_init(struct fdset *pfdset);
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int fdset_add(struct fdset *pfdset, int fd,
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fd_cb rcb, fd_cb wcb, void *dat);
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void *fdset_del(struct fdset *pfdset, int fd);
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void fdset_event_dispatch(struct fdset *pfdset);
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#endif
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