ea26d58729
Removed dead code that assumed that M_TRYWAIT can return NULL; it's not true since the advent of MBUMA. Reviewed by: arch There are ongoing disputes as to whether we want to switch to directly using UMA flags M_WAITOK/M_NOWAIT for mbuf(9) allocation.
293 lines
9.1 KiB
C
293 lines
9.1 KiB
C
/*-
|
|
*
|
|
* ===================================
|
|
* HARP | Host ATM Research Platform
|
|
* ===================================
|
|
*
|
|
*
|
|
* This Host ATM Research Platform ("HARP") file (the "Software") is
|
|
* made available by Network Computing Services, Inc. ("NetworkCS")
|
|
* "AS IS". NetworkCS does not provide maintenance, improvements or
|
|
* support of any kind.
|
|
*
|
|
* NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
|
|
* INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
|
|
* AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
|
|
* SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
|
|
* In no event shall NetworkCS be responsible for any damages, including
|
|
* but not limited to consequential damages, arising from or relating to
|
|
* any use of the Software or related support.
|
|
*
|
|
* Copyright 1994-1998 Network Computing Services, Inc.
|
|
*
|
|
* Copies of this Software may be made, however, the above copyright
|
|
* notice must be reproduced on all copies.
|
|
*
|
|
* @(#) $FreeBSD$
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* System Configuration
|
|
* --------------------
|
|
*
|
|
* Porting aides
|
|
*
|
|
*/
|
|
|
|
#ifndef _NETATM_PORT_H
|
|
#define _NETATM_PORT_H
|
|
|
|
|
|
#ifdef _KERNEL
|
|
/*
|
|
* Kernel buffers
|
|
*
|
|
* KBuffer Typedef for a kernel buffer.
|
|
*
|
|
* KB_NEXT(bfr) Access next buffer in chain (r/w).
|
|
* KB_LEN(bfr) Access length of data in this buffer (r/w).
|
|
* KB_QNEXT(bfr) Access next buffer in queue (r/w).
|
|
*
|
|
* KB_ALLOC(bfr, size, flags, type)
|
|
* Allocates a new kernel buffer of at least size bytes.
|
|
* KB_ALLOCPKT(bfr, size, flags, type)
|
|
* Allocates a new kernel packet header buffer of at
|
|
* least size bytes.
|
|
* KB_ALLOCEXT(bfr, size, flags, type)
|
|
* Allocates a new kernel buffer with external storage
|
|
* of at least size bytes.
|
|
* KB_FREEONE(bfr, nxt) Free buffer bfr and set next buffer in chain in nxt.
|
|
* KB_FREEALL(bfr) Free bfr's entire buffer chain.
|
|
* KB_COPY(bfr, off, len, new, flags)
|
|
* Copy len bytes of user data from buffer bfr starting at
|
|
* byte offset off and return new buffer chain in new.
|
|
* If len is KB_COPYALL, copy until end of chain.
|
|
* KB_COPYDATA(bfr, off, len, datap)
|
|
* Copy data from buffer bfr starting at byte offset off
|
|
* for len bytes into the data area pointed to by datap.
|
|
* Returns the number of bytes not copied to datap.
|
|
* KB_PULLUP(bfr, n, new)
|
|
* Get at least the first n bytes of data in the buffer
|
|
* chain headed by bfr contiguous in the first buffer.
|
|
* Returns the (potentially new) head of the chain in new.
|
|
* On failure the chain is freed and NULL is returned.
|
|
* KB_LINKHEAD(new, head)
|
|
* Link the kernel buffer new at the head of the buffer
|
|
* chain headed by head. If both new and head are
|
|
* packet header buffers, new will become the packet
|
|
* header for the chain.
|
|
* KB_LINK(new, prev)
|
|
* Link the kernel buffer new into the buffer chain
|
|
* after the buffer prev.
|
|
* KB_UNLINKHEAD(head, next)
|
|
* Unlink the kernel buffer from the head of the buffer
|
|
* chain headed by head. The buffer head will be freed
|
|
* and the new chain head will be placed in next.
|
|
* KB_UNLINK(old, prev, next)
|
|
* Unlink the kernel buffer old with previous buffer prev
|
|
* from its buffer chain. The following buffer in the
|
|
* chain will be placed in next and the buffer old will
|
|
* be freed.
|
|
* KB_ISPKT(bfr) Tests whether bfr is a packet header buffer.
|
|
* KB_ISEXT(bfr) Tests whether bfr has external storage.
|
|
* KB_BFRSTART(bfr, x, t)
|
|
* Sets x (cast to type t) to point to the start of the
|
|
* buffer space in bfr.
|
|
* KB_BFREND(bfr, x, t)
|
|
* Sets x (cast to type t) to point one byte past the end
|
|
* of the buffer space in bfr.
|
|
* KB_BFRLEN(bfr) Returns length of buffer space in bfr.
|
|
* KB_DATASTART(bfr, x, t)
|
|
* Sets x (cast to type t) to point to the start of the
|
|
* buffer data contained in bfr.
|
|
* KB_DATAEND(bfr, x, t)
|
|
* Sets x (cast to type t) to point one byte past the end
|
|
* of the buffer data contained in bfr.
|
|
* KB_HEADSET(bfr, n) Sets the start address for buffer data in buffer bfr to
|
|
* n bytes from the beginning of the buffer space.
|
|
* KB_HEADMOVE(bfr, n) Adjust buffer data controls to move data down (n > 0)
|
|
* or up (n < 0) n bytes in the buffer bfr.
|
|
* KB_HEADADJ(bfr, n) Adjust buffer data controls to add (n > 0) or subtract
|
|
* (n < 0) n bytes of data to/from the beginning of bfr.
|
|
* KB_TAILADJ(bfr, n) Adjust buffer data controls to add (n > 0) or subtract
|
|
* (n < 0) n bytes of data to/from the end of bfr.
|
|
* KB_TAILALIGN(bfr, n) Set buffer data controls to place an object of size n
|
|
* at the end of bfr, longword aligned.
|
|
* KB_HEADROOM(bfr, n) Set n to the amount of buffer space available before
|
|
* the start of data in bfr.
|
|
* KB_TAILROOM(bfr, n) Set n to the amount of buffer space available after
|
|
* the end of data in bfr.
|
|
* KB_PLENGET(bfr, n) Set n to bfr's packet length.
|
|
* KB_PLENSET(bfr, n) Set bfr's packet length to n.
|
|
* KB_PLENADJ(bfr, n) Adjust total packet length by n bytes.
|
|
*
|
|
*/
|
|
#include <sys/mbuf.h>
|
|
typedef struct mbuf KBuffer;
|
|
|
|
#define KB_F_WAIT M_WAIT
|
|
#define KB_F_NOWAIT M_DONTWAIT
|
|
|
|
#define KB_T_HEADER MT_HEADER
|
|
#define KB_T_DATA MT_DATA
|
|
|
|
#define KB_COPYALL M_COPYALL
|
|
|
|
#define KB_NEXT(bfr) (bfr)->m_next
|
|
#define KB_LEN(bfr) (bfr)->m_len
|
|
#define KB_QNEXT(bfr) (bfr)->m_nextpkt
|
|
#define KB_ALLOC(bfr, size, flags, type) { \
|
|
if ((size) <= MLEN) { \
|
|
MGET((bfr), (flags), (type)); \
|
|
} else \
|
|
(bfr) = NULL; \
|
|
}
|
|
#define KB_ALLOCPKT(bfr, size, flags, type) { \
|
|
if ((size) <= MHLEN) { \
|
|
MGETHDR((bfr), (flags), (type)); \
|
|
} else \
|
|
(bfr) = NULL; \
|
|
}
|
|
#define KB_ALLOCEXT(bfr, size, flags, type) { \
|
|
if ((size) <= MCLBYTES) { \
|
|
MGET((bfr), (flags), (type)); \
|
|
if ((bfr) != NULL) { \
|
|
MCLGET((bfr), (flags)); \
|
|
if (((bfr)->m_flags & M_EXT) == 0) { \
|
|
m_freem((bfr)); \
|
|
(bfr) = NULL; \
|
|
} \
|
|
} \
|
|
} else \
|
|
(bfr) = NULL; \
|
|
}
|
|
#define KB_FREEONE(bfr, nxt) { \
|
|
(nxt) = m_free(bfr); \
|
|
}
|
|
#define KB_FREEALL(bfr) { \
|
|
m_freem(bfr); \
|
|
}
|
|
#define KB_COPY(bfr, off, len, new, flags) { \
|
|
(new) = m_copym((bfr), (off), (len), (flags)); \
|
|
}
|
|
#define KB_COPYDATA(bfr, off, len, datap) \
|
|
(m_copydata((bfr), (off), (len), (datap)), 0)
|
|
#define KB_PULLUP(bfr, n, new) { \
|
|
(new) = m_pullup((bfr), (n)); \
|
|
}
|
|
#define KB_LINKHEAD(new, head) { \
|
|
if ((head) && KB_ISPKT(new) && KB_ISPKT(head)) {\
|
|
M_MOVE_PKTHDR((new), (head)); \
|
|
} \
|
|
(new)->m_next = (head); \
|
|
}
|
|
#define KB_LINK(new, prev) { \
|
|
(new)->m_next = (prev)->m_next; \
|
|
(prev)->m_next = (new); \
|
|
}
|
|
#define KB_UNLINKHEAD(head, next) { \
|
|
(next) = m_free((head)); \
|
|
(head) = NULL; \
|
|
}
|
|
#define KB_UNLINK(old, prev, next) { \
|
|
(next) = m_free((old)); \
|
|
(old) = NULL; \
|
|
(prev)->m_next = (next); \
|
|
}
|
|
#define KB_ISPKT(bfr) (((bfr)->m_flags & M_PKTHDR) != 0)
|
|
#define KB_ISEXT(bfr) (((bfr)->m_flags & M_EXT) != 0)
|
|
#define KB_BFRSTART(bfr, x, t) { \
|
|
if ((bfr)->m_flags & M_EXT) \
|
|
(x) = (t)((bfr)->m_ext.ext_buf); \
|
|
else if ((bfr)->m_flags & M_PKTHDR) \
|
|
(x) = (t)(&(bfr)->m_pktdat); \
|
|
else \
|
|
(x) = (t)((bfr)->m_dat); \
|
|
}
|
|
#define KB_BFREND(bfr, x, t) { \
|
|
if ((bfr)->m_flags & M_EXT) \
|
|
(x) = (t)((bfr)->m_ext.ext_buf + (bfr)->m_ext.ext_size);\
|
|
else if ((bfr)->m_flags & M_PKTHDR) \
|
|
(x) = (t)(&(bfr)->m_pktdat + MHLEN); \
|
|
else \
|
|
(x) = (t)((bfr)->m_dat + MLEN); \
|
|
}
|
|
#define KB_BFRLEN(bfr) \
|
|
(((bfr)->m_flags & M_EXT) ? (bfr)->m_ext.ext_size : \
|
|
(((bfr)->m_flags & M_PKTHDR) ? MHLEN : MLEN))
|
|
#define KB_DATASTART(bfr, x, t) { \
|
|
(x) = mtod((bfr), t); \
|
|
}
|
|
#define KB_DATAEND(bfr, x, t) { \
|
|
(x) = (t)(mtod((bfr), caddr_t) + (bfr)->m_len); \
|
|
}
|
|
#define KB_HEADSET(bfr, n) { \
|
|
if ((bfr)->m_flags & M_EXT) \
|
|
(bfr)->m_data = (bfr)->m_ext.ext_buf + (n); \
|
|
else if ((bfr)->m_flags & M_PKTHDR) \
|
|
(bfr)->m_data = (bfr)->m_pktdat + (n); \
|
|
else \
|
|
(bfr)->m_data = (bfr)->m_dat + (n); \
|
|
}
|
|
#define KB_HEADMOVE(bfr, n) { \
|
|
(bfr)->m_data += (n); \
|
|
}
|
|
#define KB_HEADADJ(bfr, n) { \
|
|
(bfr)->m_len += (n); \
|
|
(bfr)->m_data -= (n); \
|
|
}
|
|
#define KB_TAILADJ(bfr, n) { \
|
|
(bfr)->m_len += (n); \
|
|
}
|
|
#define KB_TAILALIGN(bfr, n) { \
|
|
(bfr)->m_len = (n); \
|
|
if ((bfr)->m_flags & M_EXT) \
|
|
(bfr)->m_data = (caddr_t)(((uintptr_t)(bfr)->m_ext.ext_buf \
|
|
+ (bfr)->m_ext.ext_size - (n)) & ~(sizeof(long) - 1));\
|
|
else \
|
|
(bfr)->m_data = (caddr_t)(((uintptr_t)(bfr)->m_dat + MLEN - (n)) \
|
|
& ~(sizeof(long) - 1)); \
|
|
}
|
|
#define KB_HEADROOM(bfr, n) { \
|
|
/* N = m_leadingspace(BFR) XXX */ \
|
|
(n) = ((bfr)->m_flags & M_EXT ? (bfr)->m_data - (bfr)->m_ext.ext_buf : \
|
|
(bfr)->m_flags & M_PKTHDR ? (bfr)->m_data - (bfr)->m_pktdat : \
|
|
(bfr)->m_data - (bfr)->m_dat); \
|
|
}
|
|
#define KB_TAILROOM(bfr, n) { \
|
|
(n) = M_TRAILINGSPACE(bfr); \
|
|
}
|
|
#define KB_PLENGET(bfr, n) { \
|
|
(n) = (bfr)->m_pkthdr.len; \
|
|
}
|
|
#define KB_PLENSET(bfr, n) { \
|
|
(bfr)->m_pkthdr.len = (n); \
|
|
}
|
|
#define KB_PLENADJ(bfr, n) { \
|
|
(bfr)->m_pkthdr.len += (n); \
|
|
}
|
|
|
|
|
|
/*
|
|
* Kernel time
|
|
*
|
|
* KTimeout_ret Typedef for timeout() function return
|
|
*
|
|
* KT_TIME(t) Sets t to the current time.
|
|
*
|
|
*/
|
|
typedef void KTimeout_ret;
|
|
#define KT_TIME(t) microtime(&t)
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
#ifndef MAX
|
|
#define MAX(a,b) max((a),(b))
|
|
#endif
|
|
#ifndef MIN
|
|
#define MIN(a,b) min((a),(b))
|
|
#endif
|
|
|
|
#endif /* _NETATM_PORT_H */
|