This adds a new ng_device command, NGM_DEVICE_ETHERALIGN, which has no
associated args. After the command arrives, the device begins adjusting all
packets sent out its hook to have ETHER_ALIGN bytes of padding at the
beginning of the packet. The ETHER_ALIGN padding is added only when
running on an architecture that requires strict alignment of IP headers
(based on the __NO_STRICT_ALIGNMENT macro, which is only #define'd on
x86 as of this writing).
This also adds ascii <-> binary command translation to ng_device, both for
the existing NGM_DEVICE_GET_DEVNAME and the new ETHERALIGN command.
This also gives a name to every ng_device node when it is constructed, using
the cdev device name (ngd0, ngd1, etc). This makes it easier to address
command msgs to the device using ngctl(8).
Reviewed by: donner, ray, adrian
Differential Revision: https://reviews.freebsd.org/D32905
MFC after: 1 week
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.
The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
No functional change intended.
struct ifnet if_oqdrops.
Some netgraph modules used ifqueue w/o ifnet. Accounting of queue drops
is simply removed from them. There were no API to read this statistic.
Sponsored by: Netflix
Sponsored by: Nginx, Inc.
Code should just use the devtoname() function to obtain the name of a
character device. Also add const keywords to pieces of code that need it
to build properly.
MFC after: 2 weeks
When I changed kern_conf.c three months ago I made device unit numbers
equal to (unneeded) device minor numbers. We used to require
bitshifting, because there were eight bits in the middle that were
reserved for a device major number. Not very long after I turned
dev2unit(), minor(), unit2minor() and minor2unit() into macro's.
The unit2minor() and minor2unit() macro's were no-ops.
We'd better not remove these four macro's from the kernel, because there
is a lot of (external) code that may still depend on them. For now it's
harmless to remove all invocations of unit2minor() and minor2unit().
Reviewed by: kib
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
to the mbuf. Offset cannot exceed MHLEN bytes. This is currently used to
fix Ethernet header alignment problem on alpha and sparc64. Also change all
users of m_uiotombuf to pass proper offset.
Reviewed by: jmg, sam
Tested by: Sten Spans "sten AT blinkenlights DOT nl"
MFC after: 1 week
- refactor ngd_constructor, so that make_dev() is called without
any locks held, since it mallocs memory with M_WAITOK flag.
- rename global mtx, to have name different to per-node mtx
MFC after: 2 weeks
List of functional changes:
- Make a single device per single node with a single hook.
This gives us parrallelizm, which can't be achieved on a single
node with many devices/hooks. This also gives us flexibility - we
can play with a particular device node, not affecting others.
- Remove read queue as it is. Use struct ifqueue instead. This change
removes a lot of extra memcpy()ing, m_devget()ting and m_copymem()ming.
In ng_device_receivedata() we enqueue an mbuf and wake readers.
In ngdread() we take one mbuf from qeueue and uiomove() it to
userspace. If no mbuf is present we optionally block. [1]
- In ngdwrite() we create an mbuf from uio using m_uiotombuf().
This is faster then uiomove() into buffer, and then m_copydata(),
and this is much better than huge m_pullup().
- Perform locking of device
- Perform locking of connection list.
- Clear out _rcvmsg method, since it does nothing good yet.
- Implement NGM_DEVICE_GET_DEVNAME message.
- #if 0 ioctl method, while nothing is done here yet.
- Return immediately from ngdwrite() if uio_resid == 0.
List of tidyness changes:
- Introduce device2priv(), to remove cut'n'paste.
- Use MALLOC/FREE, instead of malloc/free.
- Use unit2minor().
- Use UID_ROOT/GID_WHEEL instead of 0/0.
- Define NGD_DEVICE_DEVNAME, use it.
- Use more nice macros for debugging. [2]
- Return Exxx, not -1.
style(9) changes:
- No "#endif" after short block.
- Break long lines.
- Remove extra spaces, add needed spaces.
[1] Obtained from: if_tun.c
[2] Obtained from: ng_pppoe.c
Reviewed by: marks
Approved by: julian (mentor)
MFC after: 1 month
- Return meaningful return errorcodes.
- Free previously allocated connection in error cases.
In ng_device_rcvdata():
- Return meaningful return errorcodes.
- Detach mbuf from netgraph item, and free the item before
doing any other actions that may return from method.
- Do not call strange malloc() for buffer. [1]
- In case of any error jump to end, where mbuf is freed.
In ng_device_disconnect():
- Return meaningful return errorcodes.
- Free disconnected connection.
style(9) in mentioned above functions:
- Remove '/* NGD_DEBUG */', when only one line is ifdef'ed.
- Remove extra braces to easier reading.
- Add space after comma in function calls.
PR: kern/41881 (part)
Reviewed by: marks
Approved by: julian (mentor)
2. Sort includes, while here.
3. s/NULL/0/ in NG_SEND_MSG_HOOK(), since ng_ID_t is integer.
PR: kern/41881 (part)
Reviewed by: marks
Approved by: julian (mentor)
Introduce d_version field in struct cdevsw, this must always be
initialized to D_VERSION.
Flip sense of D_NOGIANT flag to D_NEEDGIANT, this involves removing
four D_NOGIANT flags and adding 145 D_NEEDGIANT flags.
Free approx 86 major numbers with a mostly automatically generated patch.
A number of strategic drivers have been left behind by caution, and a few
because they still (ab)use their major number.
branches:
Initialize struct cdevsw using C99 sparse initializtion and remove
all initializations to default values.
This patch is automatically generated and has been tested by compiling
LINT with all the fields in struct cdevsw in reverse order on alpha,
sparc64 and i386.
Approved by: re(scottl)
so that /dev/mumble can be the entrypoint to some networking graph,
e.g. a tunnel or a remote tape drive or whatever...
Not fully tested (by me) yet.
Submitted by: Mark Santcroos <marks@ripe.net>
MFC after: 3 weeks
