linux.git/include/linux/sunrpc/svc.h, branch v2.6.29

sunrpc: add sv_maxconn field to svc_serv (try #3)

2009-01-06T16:53:47+00:00

svc_check_conn_limits() attempts to prevent denial of service attacks
by having the service close old connections once it reaches a
threshold. This threshold is based on the number of threads in the
service:

	(serv->sv_nrthreads + 3) * 20

Once we reach this, we drop the oldest connections and a printk pops
to warn the admin that they should increase the number of threads.

Increasing the number of threads isn't an option however for services
like lockd. We don't want to eliminate this check entirely for such
services but we need some way to increase this limit.

This patch adds a sv_maxconn field to the svc_serv struct. When it's
set to 0, we use the current method to calculate the max number of
connections. RPC services can then set this on an as-needed basis.

Signed-off-by: Jeff Layton 
Acked-by: Neil Brown 
Signed-off-by: J. Bruce Fields

SUNRPC: Make svc_addr's argument a constant

2008-09-29T22:13:38+00:00

Clean up: Add extra type safety and squelch a few compiler complaints
in upcoming patches.

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

SUNRPC: Support IPv6 when registering kernel RPC services

2008-09-29T22:13:38+00:00

In order to advertise NFS-related services on IPv6 interfaces via
rpcbind, the kernel RPC server implementation must use
rpcb_v4_register() instead of rpcb_register().

A new kernel build option allows distributions to use the legacy
v2 call until they integrate an appropriate user-space rpcbind
daemon that can support IPv6 RPC services.

I tried adding some automatic logic to fall back if registering
with a v4 protocol request failed, but there are too many corner
cases.  So I just made it a compile-time switch that distributions
can throw when they've replaced portmapper with rpcbind.

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

SUNRPC: Add address family field to svc_serv data structure

2008-09-29T21:56:56+00:00

Introduce and initialize an address family field in the svc_serv structure.

This field will determine what family to use for the service's listener
sockets and what families are advertised via the local rpcbind daemon.

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

sunrpc: remove sv_kill_signal field from svc_serv struct

2008-06-23T17:02:49+00:00

Since we no longer make any distinction between shutdown signals with
nfsd, then it becomes easier to just standardize on a particular signal
to use to bring it down (SIGINT, in this case).

Signed-off-by: Jeff Layton 
Signed-off-by: J. Bruce Fields

knfsd: convert knfsd to kthread API

2008-06-23T17:02:49+00:00

This patch is rather large, but I couldn't figure out a way to break it
up that would remain bisectable. It does several things:

- change svc_thread_fn typedef to better match what kthread_create expects
- change svc_pool_map_set_cpumask to be more kthread friendly. Make it
  take a task arg and and get rid of the "oldmask"
- have svc_set_num_threads call kthread_create directly
- eliminate __svc_create_thread

Signed-off-by: Jeff Layton 
Signed-off-by: J. Bruce Fields

SUNRPC: remove svc_create_thread()

2008-04-23T20:13:42+00:00

Now that the nfs4 callback thread uses the kthread API, there are no
more users of svc_create_thread(). Remove it.

Signed-off-by: Jeff Layton 
Signed-off-by: J. Bruce Fields

nfsd: clean up svc_reserve_auth()

2008-02-10T23:11:16+00:00

This is a void function attempting to return the return value from
another void function, which seems harmless but extremely weird, and
apparently makes some compilers complain.

While we're there, clean up a little (e.g. the switch statement had a
minor style problem and seemed overkill as long as there's only one
case).

Thanks to Trond for noticing this.

Signed-off-by: J. Bruce Fields 
Cc: Trond Myklebust

SUNRPC: spin svc_rqst initialization to its own function

2008-02-01T21:42:15+00:00

Move the initialzation in __svc_create_thread that happens prior to
thread creation to a new function. Export the function to allow
services to have better control over the svc_rqst structs.

Also rearrange the rqstp initialization to prevent NULL pointer
dereferences in svc_exit_thread in case allocations fail.

Signed-off-by: Jeff Layton 
Reviewed-by: NeilBrown 
Signed-off-by: J. Bruce Fields

svc: Add transport hdr size for defer/revisit

2008-02-01T21:42:13+00:00

Some transports have a header in front of the RPC header. The current
defer/revisit processing considers only the iov_len and arg_len to
determine how much to back up when saving the original request
to revisit. Add a field to the rqstp structure to save the size
of the transport header so svc_defer can correctly compute
the start of a request.

Signed-off-by: Tom Tucker 
Acked-by: Neil Brown 
Reviewed-by: Chuck Lever 
Reviewed-by: Greg Banks 
Signed-off-by: J. Bruce Fields