linux-toradex.git/include/linux/lockd/lockd.h, branch tegra-9.12.13

NLM: Shrink the IPv4-only version of nlm_cmp_addr()

2009-03-11T00:33:19+00:00

Clean up/micro-optimatization:  Make the AF_INET-only version of
nlm_cmp_addr() smaller.  This matches the style of
nlm_privileged_requester(), and makes the AF_INET-only version of
nlm_cmp_addr() nearly the same size as it was before IPv6 support.

Signed-off-by: Chuck Lever 
Signed-off-by: Trond Myklebust

NLM: Rewrite IPv4 privileged requester's check

2009-01-06T16:53:56+00:00

Clean up.

For consistency, rewrite the IPv4 check to match the same style as the
new IPv6 check.  Note that ipv4_is_loopback() is somewhat broader in
its interpretation of what is a loopback address than simply
"127.0.0.1".

Signed-off-by: Chuck Lever 
Signed-off-by: J. Bruce Fields

NLM: nlm_privileged_requester() doesn't recognize mapped loopback address

2009-01-06T16:53:56+00:00

Commit b85e4676 added the nlm_privileged_requester() helper to check
whether an RPC request was sent from a local privileged caller.  It
recognizes IPv4 privileged callers (from "127.0.0.1"), and IPv6
privileged callers (from "::1").

However, IPV6_ADDR_LOOPBACK is not set for the mapped IPv4 loopback
address (::ffff:7f00:0001), so the test breaks when the kernel's RPC
service is IPv6-enabled but user space is calling via the IPv4
loopback address.  This is actually the most common case for IPv6-
enabled RPC services on Linux.

Rewrite the IPv6 check to handle the mapped IPv4 loopback address as
well as a normal IPv6 loopback address.

Signed-off-by: Chuck Lever 
Signed-off-by: J. Bruce Fields

NSM: Move nsm_addr() to fs/lockd/mon.c

2009-01-06T16:53:55+00:00

Clean up: nsm_addr_in() is no longer used, and nsm_addr() is used only in
fs/lockd/mon.c, so move it there.

Signed-off-by: Chuck Lever 
Signed-off-by: J. Bruce Fields

NSM: Remove include/linux/lockd/sm_inter.h

2009-01-06T16:53:55+00:00

Clean up: The include/linux/lockd/sm_inter.h header is nearly empty
now.  Remove it.

Signed-off-by: Chuck Lever 
Signed-off-by: J. Bruce Fields

NLM: Remove "create" argument from nsm_find()

2009-01-06T16:53:54+00:00

Clean up: nsm_find() now has only one caller, and that caller
unconditionally sets the @create argument. Thus the @create
argument is no longer needed.

Since nsm_find() now has a more specific purpose, pick a more
appropriate name for it.

Signed-off-by: Chuck Lever 
Signed-off-by: J. Bruce Fields

NSM: Add nsm_lookup() function

2009-01-06T16:53:54+00:00

Introduce a new API to fs/lockd/mon.c that allows nlm_host_rebooted()
to lookup up nsm_handles via the contents of an nlm_reboot struct.

The new function is equivalent to calling nsm_find() with @create set
to zero, but it takes a struct nlm_reboot instead of separate
arguments.

Signed-off-by: Chuck Lever 
Signed-off-by: J. Bruce Fields

NLM: Change nlm_host_rebooted() to take a single nlm_reboot argument

2009-01-06T16:53:54+00:00

Pass the nlm_reboot data structure directly from the NLMPROC_SM_NOTIFY
XDR decoders to nlm_host_rebooted().  This eliminates some packing and
unpacking of the NLMPROC_SM_NOTIFY results, and prepares for passing
these results, including the "priv" cookie, directly to a lookup
routine in fs/lockd/mon.c.

This patch changes code organization but should not cause any
behavioral change.

Signed-off-by: Chuck Lever 
Signed-off-by: J. Bruce Fields

NSM: Generate NSMPROC_MON's "priv" argument when nsm_handle is created

2009-01-06T16:53:53+00:00

Introduce a new data type, used by both the in-kernel NLM and NSM
implementations, that is used to manage the opaque "priv" argument
for the NSMPROC_MON and NLMPROC_SM_NOTIFY calls.

Construct the "priv" cookie when the nsm_handle is created.

The nsm_init_private() function may look a little strange, but it is
roughly equivalent to how the XDR encoder formed the "priv" argument.
It's going to go away soon.

Signed-off-by: Chuck Lever 
Signed-off-by: J. Bruce Fields

NSM: Move nsm_find() to fs/lockd/mon.c

2009-01-06T16:53:53+00:00

The nsm_find() function sets up fresh nsm_handle entries.  This is
where we will store the "priv" cookie used to lookup nsm_handles during
reboot recovery.  The cookie will be constructed when nsm_find()
creates a new nsm_handle.

As much as possible, I would like to keep everything that handles a
"priv" cookie in fs/lockd/mon.c so that all the smarts are in one
source file.  That organization should make it pretty simple to see how
all this works.

To me, it makes more sense than the current arrangement to keep
nsm_find() with nsm_monitor() and nsm_unmonitor().

So, start reorganizing by moving nsm_find() into fs/lockd/mon.c.  The
nsm_release() function comes along too, since it shares the nsm_lock
global variable.

Signed-off-by: Chuck Lever 
Signed-off-by: J. Bruce Fields