| mbuf.9 (141851) | mbuf.9 (143761) |
|---|---|
| 1.\" Copyright (c) 2000 FreeBSD Inc. 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. --- 8 unchanged lines hidden (view full) --- 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" | 1.\" Copyright (c) 2000 FreeBSD Inc. 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. --- 8 unchanged lines hidden (view full) --- 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" |
| 25.\" $FreeBSD: head/share/man/man9/mbuf.9 141851 2005-02-13 23:45:54Z ru $ | 25.\" $FreeBSD: head/share/man/man9/mbuf.9 143761 2005-03-17 19:34:57Z jmg $ |
| 26.\" 27.Dd August 27, 2004 28.Dt MBUF 9 29.Os 30.\" 31.Sh NAME 32.Nm mbuf 33.Nd "memory management in the kernel IPC subsystem" --- 56 unchanged lines hidden (view full) --- 90.Ss Mbuf utility functions 91.Ft void 92.Fn m_adj "struct mbuf *mbuf" "int len" 93.Ft int 94.Fn m_append "struct mbuf *mbuf" "int len" "c_caddr_t cp" 95.Ft struct mbuf * 96.Fn m_prepend "struct mbuf *mbuf" "int len" "int how" 97.Ft struct mbuf * | 26.\" 27.Dd August 27, 2004 28.Dt MBUF 9 29.Os 30.\" 31.Sh NAME 32.Nm mbuf 33.Nd "memory management in the kernel IPC subsystem" --- 56 unchanged lines hidden (view full) --- 90.Ss Mbuf utility functions 91.Ft void 92.Fn m_adj "struct mbuf *mbuf" "int len" 93.Ft int 94.Fn m_append "struct mbuf *mbuf" "int len" "c_caddr_t cp" 95.Ft struct mbuf * 96.Fn m_prepend "struct mbuf *mbuf" "int len" "int how" 97.Ft struct mbuf * |
| 98.Fn m_copyup "struct mbuf *mbuf" "int len" "int dstoff" 99.Ft struct mbuf * |
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| 98.Fn m_pullup "struct mbuf *mbuf" "int len" 99.Ft struct mbuf * 100.Fn m_copym "struct mbuf *mbuf" "int offset" "int len" "int how" 101.Ft struct mbuf * 102.Fn m_copypacket "struct mbuf *mbuf" "int how" 103.Ft struct mbuf * 104.Fn m_dup "struct mbuf *mbuf" "int how" 105.Ft void --- 503 unchanged lines hidden (view full) --- 609must be less than 610.Dv MLEN 611or 612.Dv MHLEN , 613depending on the 614.Dv M_PKTHDR 615flag setting. 616.\" | 100.Fn m_pullup "struct mbuf *mbuf" "int len" 101.Ft struct mbuf * 102.Fn m_copym "struct mbuf *mbuf" "int offset" "int len" "int how" 103.Ft struct mbuf * 104.Fn m_copypacket "struct mbuf *mbuf" "int how" 105.Ft struct mbuf * 106.Fn m_dup "struct mbuf *mbuf" "int how" 107.Ft void --- 503 unchanged lines hidden (view full) --- 611must be less than 612.Dv MLEN 613or 614.Dv MHLEN , 615depending on the 616.Dv M_PKTHDR 617flag setting. 618.\" |
| 619.It Fn m_copyup mbuf len dstoff 620Similar to 621.Fn m_pullup 622but copies 623.Fa len 624bytes of data into a new mbuf at 625.Fa dstoff 626bytes into the mbuf. 627The 628.Fa dstoff 629argument aligns the data and leaves room for a link layer header. 630Return the new 631.Vt mbuf chain 632on success, 633and frees the 634.Vt mbuf chain 635and returns 636.Dv NULL 637on failure. 638.Sy Note : 639The function does not allocate 640.Vt mbuf clusters , 641so 642.Fa len + dstoff 643must be less than 644.Dv MHLEN . 645.\" |
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| 617.It Fn m_pullup mbuf len 618Arrange that the first 619.Fa len 620bytes of an 621.Vt mbuf chain 622are contiguous and lay in the data area of 623.Fa mbuf , 624so they are accessible with --- 460 unchanged lines hidden --- | 646.It Fn m_pullup mbuf len 647Arrange that the first 648.Fa len 649bytes of an 650.Vt mbuf chain 651are contiguous and lay in the data area of 652.Fa mbuf , 653so they are accessible with --- 460 unchanged lines hidden --- |