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linux-sg2042/Documentation/infiniband/ipoib.txt

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Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
IP OVER INFINIBAND
The ib_ipoib driver is an implementation of the IP over InfiniBand
IPoIB: Mention RFC numbers in documentation Now that the IETF has released RFCs covering IPoIB, give the numbers in the documentation for IPoIB. Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-06-18 11:37:32 +08:00
protocol as specified by RFC 4391 and 4392, issued by the IETF ipoib
working group. It is a "native" implementation in the sense of
setting the interface type to ARPHRD_INFINIBAND and the hardware
address length to 20 (earlier proprietary implementations
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
masqueraded to the kernel as ethernet interfaces).
Partitions and P_Keys
When the IPoIB driver is loaded, it creates one interface for each
port using the P_Key at index 0. To create an interface with a
different P_Key, write the desired P_Key into the main interface's
/sys/class/net/<intf name>/create_child file. For example:
echo 0x8001 > /sys/class/net/ib0/create_child
This will create an interface named ib0.8001 with P_Key 0x8001. To
remove a subinterface, use the "delete_child" file:
echo 0x8001 > /sys/class/net/ib0/delete_child
The P_Key for any interface is given by the "pkey" file, and the
main interface for a subinterface is in "parent."
Debugging Information
By compiling the IPoIB driver with CONFIG_INFINIBAND_IPOIB_DEBUG set
to 'y', tracing messages are compiled into the driver. They are
turned on by setting the module parameters debug_level and
mcast_debug_level to 1. These parameters can be controlled at
runtime through files in /sys/module/ib_ipoib/.
[PATCH] IPoIB: document conversion to debugfs Update IPoIB documentation now that multicast debugging files have moved from ipoibdebugfs to debugfs. Signed-off-by: Roland Dreier <roland@topspin.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-17 06:26:07 +08:00
CONFIG_INFINIBAND_IPOIB_DEBUG also enables files in the debugfs
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
virtual filesystem. By mounting this filesystem, for example with
[PATCH] IPoIB: document conversion to debugfs Update IPoIB documentation now that multicast debugging files have moved from ipoibdebugfs to debugfs. Signed-off-by: Roland Dreier <roland@topspin.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-17 06:26:07 +08:00
mount -t debugfs none /sys/kernel/debug
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
it is possible to get statistics about multicast groups from the
[PATCH] IPoIB: document conversion to debugfs Update IPoIB documentation now that multicast debugging files have moved from ipoibdebugfs to debugfs. Signed-off-by: Roland Dreier <roland@topspin.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-17 06:26:07 +08:00
files /sys/kernel/debug/ipoib/ib0_mcg and so on.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
The performance impact of this option is negligible, so it
is safe to enable this option with debug_level set to 0 for normal
operation.
CONFIG_INFINIBAND_IPOIB_DEBUG_DATA enables even more debug output in
the data path when data_debug_level is set to 1. However, even with
the output disabled, enabling this configuration option will affect
performance, because it adds tests to the fast path.
References
IPoIB: Mention RFC numbers in documentation Now that the IETF has released RFCs covering IPoIB, give the numbers in the documentation for IPoIB. Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-06-18 11:37:32 +08:00
Transmission of IP over InfiniBand (IPoIB) (RFC 4391)
http://ietf.org/rfc/rfc4391.txt
IP over InfiniBand (IPoIB) Architecture (RFC 4392)
http://ietf.org/rfc/rfc4392.txt