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IB/mad: add new ioctl to ABI to support new registration options

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Registrations options are specified through flags.  Definitions of flags will
be in subsequent patches.

Signed-off-by: Ira Weiny <[email protected]>
Signed-off-by: Roland Dreier <[email protected]>
This commit is contained in:
Ira Weiny 2014-08-08 19:00:55 -04:00 • committed by Roland Dreier
commit 0f29b46d49
12 changed files with 186 additions and 16 deletions
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13
Documentation/infiniband/user_mad.txt
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@ -26,6 +26,11 @@ Creating MAD agents
ioctl. Also, all agents registered through a file descriptor will
be unregistered when the descriptor is closed.
2014 -- a new registration ioctl is now provided which allows additional
fields to be provided during registration.
Users of this registration call are implicitly setting the use of
pkey_index (see below).
Receiving MADs
MADs are received using read(). The receive side now supports
@ -104,10 +109,10 @@ P_Key Index Handling
The old ib_umad interface did not allow setting the P_Key index for
MADs that are sent and did not provide a way for obtaining the P_Key
index of received MADs. A new layout for struct ib_user_mad_hdr
with a pkey_index member has been defined; however, to preserve
binary compatibility with older applications, this new layout will
not be used unless the IB_USER_MAD_ENABLE_PKEY ioctl is called
before a file descriptor is used for anything else.
with a pkey_index member has been defined; however, to preserve binary
compatibility with older applications, this new layout will not be used
unless one of IB_USER_MAD_ENABLE_PKEY or IB_USER_MAD_REGISTER_AGENT2 ioctl's
are called before a file descriptor is used for anything else.
In September 2008, the IB_USER_MAD_ABI_VERSION will be incremented
to 6, the new layout of struct ib_user_mad_hdr will be used by