Resync with head.

Remove unneeded include.

MFC after: 3 days

Update the projects tree to a newer FreeBSD current.

Teach m_copyback() to use trailing space of the last mbuf in chain.

Remove the alignment of the align parameter. This is up to the caller to pass
in and it breaks tap(4) on strict alignment machines as m_uiotombuf is called
with ETHER_ALIGN.

Found by: Jared Go
Revie

Remove the alignment of the align parameter. This is up to the caller to pass
in and it breaks tap(4) on strict alignment machines as m_uiotombuf is called
with ETHER_ALIGN.

Found by: Jared Go
Reviewed by: emax
MFC after: 3 days

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Attempt to make the print types more friendly to other architectures.

Prodded by: Max Laier
Help from: BMS, jhb

Add an option (compiled out by default)
to profile outoing packets for a number of mbuf chain
related parameters
e.g. number of mbufs, wasted space.
probably will do with further work later.

Reviewe

Add an option (compiled out by default)
to profile outoing packets for a number of mbuf chain
related parameters
e.g. number of mbufs, wasted space.
probably will do with further work later.

Reviewed by: various

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Replaced the misleading uses of a historical artefact M_TRYWAIT with M_WAIT.
Removed dead code that assumed that M_TRYWAIT can return NULL; it's not true
since the advent of MBUMA.

Reviewed by: arch

Replaced the misleading uses of a historical artefact M_TRYWAIT with M_WAIT.
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.

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Give MEXTADD() another argument to make both void pointers to the
free function controlable, instead of passing the KVA of the buffer
storage as the first argument.

Fix all conventional users of the

Give MEXTADD() another argument to make both void pointers to the
free function controlable, instead of passing the KVA of the buffer
storage as the first argument.

Fix all conventional users of the API to pass the KVA of the buffer
as the first argument, to make this a no-op commit.

Likely break the only non-convetional user of the API, after informing
the relevant committer.

Update the mbuf(9) manual page, which was already out of sync on
this point.

Bump __FreeBSD_version to 800016 as there is no way to tell how
many arguments a CPP macro needs any other way.

This paves the way for giving sendfile(9) a way to wait for the
passed storage to have been accessed before returning.

This does not affect the memory layout or size of mbufs.

Parental oversight by: sam and rwatson.

No MFC is anticipated.

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promote ath_defrag to m_collapse (and retire private+unused
m_collapse from cxgb)

Reviewed by: pyun, jhb, kmacy
MFC after: 2 weeks

This patch adds an M_NOFREE flag which allows one to mark an mbuf as
not being independently freeable. This allows one to embed an mbuf in
the cluster itself. This confers the benefits of the packet

This patch adds an M_NOFREE flag which allows one to mark an mbuf as
not being independently freeable. This allows one to embed an mbuf in
the cluster itself. This confers the benefits of the packet zone on
all cluster sizes. Embedded mbufs currently suffer from the same
limitation that packet zone mbufs do in that one cannot disconnect
them and pass them around independently of the cluster. It would
likely be possible to eliminate this limitation in the future by
adding a second reference for the mbuf itself.

Approved by: re(gnn)

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Generally migrate to ANSI function headers, and remove 'register' use.

remove now invalid check from m_sanity
panic on m_sanity check failure with INVARIANTS

Unbreak writes of 0 bytes. Zero byte writes happen when only ancillary
control data but no payload data is passed.

Change m_uiotombuf() to return at least one empty mbuf if the requested
length was

Unbreak writes of 0 bytes. Zero byte writes happen when only ancillary
control data but no payload data is passed.

Change m_uiotombuf() to return at least one empty mbuf if the requested
length was zero. Add comment to sosend_dgram and sosend_generic().

Diagnoses by: jhb
Regression test by: rwatson
Pointy hat to. andre

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The prepend function did not handle non-pkthdr's correctly.
It always called MH_ALIGN for small lengths being
prepended (less than MHLEN). This meant that if you did
a prepend on a non M_PKTHDR the s

The prepend function did not handle non-pkthdr's correctly.
It always called MH_ALIGN for small lengths being
prepended (less than MHLEN). This meant that if you did
a prepend on a non M_PKTHDR the system would panic with
the KASSERT in MH_ALIGN. Instead we are not aware of
this and do a MH_ALIGN or M_ALIGN as appropriate.

Reviewed by: andre
Approved by: gnn

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Rename m_getm() to m_getm2() and rewrite it to allocate up to page sized
mbuf clusters. Add a flags parameter to accept M_PKTHDR and M_EOR mbuf
chain flags. Provide compatibility macro for m_getm()

Rename m_getm() to m_getm2() and rewrite it to allocate up to page sized
mbuf clusters. Add a flags parameter to accept M_PKTHDR and M_EOR mbuf
chain flags. Provide compatibility macro for m_getm() calling m_getm2()
with M_PKTHDR set.

Rewrite m_uiotombuf() to use m_getm2() for mbuf allocation and do the
uiomove() in a tight loop over the mbuf chain. Add a flags parameter to
accept mbuf flags to be passed to m_getm2(). Adjust all callers for the
extra parameter.

Sponsored by: TCP/IP Optimization Fundraise 2005
MFC after: 3 month

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Complete break-out of sys/sys/mac.h into sys/security/mac/mac_framework.h
begun with a repo-copy of mac.h to mac_framework.h. sys/mac.h now
contains the userspace and user<->kernel API and definitio

Complete break-out of sys/sys/mac.h into sys/security/mac/mac_framework.h
begun with a repo-copy of mac.h to mac_framework.h. sys/mac.h now
contains the userspace and user<->kernel API and definitions, with all
in-kernel interfaces moved to mac_framework.h, which is now included
across most of the kernel instead.

This change is the first step in a larger cleanup and sweep of MAC
Framework interfaces in the kernel, and will not be MFC'd.

Obtained from: TrustedBSD Project
Sponsored by: SPARTA

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atomic_fetchadd_int is used by mb_free_ext(), but it
returns the previous value that the "add" effected (In
this case we are adding -1), afterwhich we compare it
to '0'... to see if we free the mbuf.

atomic_fetchadd_int is used by mb_free_ext(), but it
returns the previous value that the "add" effected (In
this case we are adding -1), afterwhich we compare it
to '0'... to see if we free the mbuf... we should
be comparing it to '1'... Note that this only effects
when there is contention since there is a first part
to the comparison that checks to see if its '1'. So
this bug would only crop up if two CPU's are trying
to free the same mbuf refcount at the same time. This
will happen in SCTP but I doubt can happen in TCP or
UDP.
PR: N/A
Submitted by: rrs
Reviewed by: gnn,sam
Approved by: gnn,sam

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Move some functions and definitions from uipc_socket2.c to uipc_socket.c:

- Move sonewconn(), which creates new sockets for incoming connections on
listen sockets, so that all socket allocate code

Move some functions and definitions from uipc_socket2.c to uipc_socket.c:

- Move sonewconn(), which creates new sockets for incoming connections on
listen sockets, so that all socket allocate code is together in
uipc_socket.c.

- Move 'maxsockets' and associated sysctls to uipc_socket.c with the
socket allocation code.

- Move kern.ipc sysctl node to uipc_socket.c, add a SYSCTL_DECL() for it
to sysctl.h and remove lots of scattered implementations in various
IPC modules.

- Sort sodealloc() after soalloc() in uipc_socket.c for dependency order
reasons. Statisticize soalloc() and sodealloc() as they are now
required only in uipc_socket.c, and are internal to the socket
implementation.

After this change, socket allocation and deallocation is entirely
centralized in one file, and uipc_socket2.c consists entirely of socket
buffer manipulation and default protocol switch functions.

MFC after: 1 month

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promote fast ipsec's m_clone routine for public use; it is renamed
m_unshare and the caller can now control how mbufs are allocated

Reviewed by: andre, luigi, mlaier
MFC after: 1 week

spell pdata correctly, we now will only dump maxlen of each mbuf in the
chain, instead of the entire mbuf... This should probably be reworked
so that it prints at max maxlen bytes for the entire cha

spell pdata correctly, we now will only dump maxlen of each mbuf in the
chain, instead of the entire mbuf... This should probably be reworked
so that it prints at max maxlen bytes for the entire chain...

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For consistency sake, use >= MINCLSIZE rather than > MINCLSIZE to determine
whether or not to allocate a full mbuf cluster rather than just a plain
mbuf when adding on additional mbufs in m_getm().

For consistency sake, use >= MINCLSIZE rather than > MINCLSIZE to determine
whether or not to allocate a full mbuf cluster rather than just a plain
mbuf when adding on additional mbufs in m_getm(). In practice, there wasn't
any resulting mem trashing since m_getm() doesn't ever allocate an mbuf with
a packet header, and MINCLSIZE is the available payload in an mbuf with a
header rather than the available payload in a plain mbuf.

Discussed with: andre (lightly)

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The sysctls kern.ipc.[max_linkhdr|max_protohdr|max_hdr|max_datalen]
can't be changed from userland. Make them read-only and provide
descriptions.

kern.ipc.max_datalen must never be less than one by

The sysctls kern.ipc.[max_linkhdr|max_protohdr|max_hdr|max_datalen]
can't be changed from userland. Make them read-only and provide
descriptions.

kern.ipc.max_datalen must never be less than one byte. Enforce this
with a panic in net_init_domain().

Sponsored by: TCP/IP Optimization Fundraise 2005
MFC after: 3 days

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Replace the 4k fixed sized jumbo mbuf clusters with PAGE_SIZE sized
jumbo mbuf clusters. To make the variable size clear they are named
MJUMPAGESIZE.

Having jumbo clusters with the native PAGE_SIZE

Replace the 4k fixed sized jumbo mbuf clusters with PAGE_SIZE sized
jumbo mbuf clusters. To make the variable size clear they are named
MJUMPAGESIZE.

Having jumbo clusters with the native PAGE_SIZE is more useful than
a fixed 4k size according the device driver writers using this API.

The 9k and 16k jumbo mbuf clusters remain unchanged.

Requested by: glebius, gallatin
Sponsored by: TCP/IP Optimization Fundraise 2005
MFC after: 3 days

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When using m_dup(9) to copy more than MHLEN bytes of data, don't create an
mbuf chain that starts with a cluster containing just MHLEN bytes. This
happened because m_dup called m_get or m_getcl depe

When using m_dup(9) to copy more than MHLEN bytes of data, don't create an
mbuf chain that starts with a cluster containing just MHLEN bytes. This
happened because m_dup called m_get or m_getcl depending on the amount of
data to copy, but then always set the size available in the first mbuf to
MHLEN.

Submitted by: Matt Koivisto <mkoivisto at sandvine dot com>
Approved by: jmg
Silence from: rwatson (mentor)

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