Set MORETOCOME for AIO write requests on a socket.
Add a MSG_MOREOTOCOME message flag. When this flag is set, sosend* set PRUS_MOREOTOCOME when invoking the protocol send method. The aio worker tasks for sending on a socket set this flag when there are additional write jobs waiting on the socket buffer. Reviewed by: adrian MFC after: 1 month Sponsored by: Chelsio Communications Differential Revision: https://reviews.freebsd.org/D8955
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=311568
@ -604,6 +604,8 @@ soaio_process_job(struct socket *so, struct sockbuf *sb, struct kaiocb *job)
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if (td->td_ru.ru_msgrcv != ru_before)
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job->msgrcv = 1;
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} else {
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if (!TAILQ_EMPTY(&sb->sb_aiojobq))
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flags |= MSG_MORETOCOME;
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uio.uio_rw = UIO_WRITE;
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ru_before = td->td_ru.ru_msgsnd;
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#ifdef MAC
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@ -1182,6 +1182,7 @@ sosend_dgram(struct socket *so, struct sockaddr *addr, struct uio *uio,
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(resid <= 0)) ?
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PRUS_EOF :
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/* If there is more to send set PRUS_MORETOCOME */
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(flags & MSG_MORETOCOME) ||
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(resid > 0 && space > 0) ? PRUS_MORETOCOME : 0,
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top, addr, control, td);
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if (dontroute) {
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@ -1368,6 +1369,7 @@ sosend_generic(struct socket *so, struct sockaddr *addr, struct uio *uio,
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(resid <= 0)) ?
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PRUS_EOF :
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/* If there is more to send set PRUS_MORETOCOME. */
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(flags & MSG_MORETOCOME) ||
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(resid > 0 && space > 0) ? PRUS_MORETOCOME : 0,
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top, addr, control, td);
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if (dontroute) {
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@ -435,6 +435,7 @@ struct msghdr {
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#endif
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#ifdef _KERNEL
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#define MSG_SOCALLBCK 0x10000 /* for use by socket callbacks - soreceive (TCP) */
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#define MSG_MORETOCOME 0x20000 /* additional data pending */
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#endif
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/*
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