| 33d90ac0581ce81d1ebfc51918a2757e41a6011c |
|
11-Apr-2013 |
J. Bruce Fields <bfields@redhat.com> |
SUNRPC: allow disabling idle timeout
In the gss-proxy case we don't want to have to reconnect at random--we
want to connect only on gss-proxy startup when we can steal gss-proxy's
context to do the connect in the right namespace.
So, provide a flag that allows the rpc_create caller to turn off the
idle timeout.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
|
| ba60eb25ff6be6f8e60488cdfd454e5c612bce60 |
|
14-Apr-2013 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Fix a livelock problem in the xprt->backlog queue
This patch ensures that we throttle new RPC requests if there are
requests already waiting in the xprt->backlog queue. The reason for
doing this is to fix livelock issues that can occur when an existing
(high priority) task is waiting in the backlog queue, gets woken up
by xprt_free_slot(), but a new task then steals the slot.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| a9a6b52ee1baa865283a91eb8d443ee91adfca56 |
|
22-Feb-2013 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Don't start the retransmission timer when out of socket space
If the socket is full, we're better off just waiting until it empties,
or until the connection is broken. The reason why we generally don't
want to time out is that the call to xprt->ops->release_xprt() will
trigger a connection reset, which isn't helpful...
Let's make an exception for soft RPC calls, since they have to provide
timeout guarantees.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@vger.kernel.org
|
| ad2368d6f5ec6467b9503176e9fb878daf999629 |
|
08-Jan-2013 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Avoid RCU dereferences in the transport bind and connect code
Avoid an RCU dereference by removing task->tk_xprt
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 45bc0dce9879505d6fd9ff68dcd0359fb260dfd7 |
|
08-Jan-2013 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Fix an RCU dereference in xprt_reserve
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 6a24dfb645dbcb05b34d08b991d082bdaa3ff072 |
|
08-Jan-2013 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Pass pointers to struct rpc_xprt to the congestion window
Avoid access to task->tk_xprt
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 1b092092bf0e2e8b7af1c2a03f615b4e60b05d47 |
|
08-Jan-2013 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Pass a pointer to struct rpc_xprt to the connect callback
Avoid another RCU dereference by passing the pointer to struct rpc_xprt
from the caller.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| a4f0835c604f80f945ab3e72ffd00547145c4b2b |
|
08-Jan-2013 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Eliminate task->tk_xprt accesses that bypass rcu_dereference()
tk_xprt is just a shortcut for tk_client->cl_xprt, however cl_xprt is
defined as an __rcu variable. Replace dereferences of tk_xprt with
non-rcu dereferences where it is safe to do so.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 87ed50036b866db2ec2ba16b2a7aec4a2b0b7c39 |
|
07-Jan-2013 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Ensure we release the socket write lock if the rpc_task exits early
If the rpc_task exits while holding the socket write lock before it has
allocated an rpc slot, then the usual mechanism for releasing the write
lock in xprt_release() is defeated.
The problem occurs if the call to xprt_lock_write() initially fails, so
that the rpc_task is put on the xprt->sending wait queue. If the task
exits after being assigned the lock by __xprt_lock_write_func, but
before it has retried the call to xprt_lock_and_alloc_slot(), then
it calls xprt_release() while holding the write lock, but will
immediately exit due to the test for task->tk_rqstp != NULL.
Reported-by: Chris Perl <chris.perl@gmail.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@vger.kernel.org [>= 3.1]
|
| d19751e7b9bd8a01d00372325439589886674f79 |
|
11-Sep-2012 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Get rid of the redundant xprt->shutdown bit field
It is only set after everyone has dereferenced the transport,
and serves no useful purpose: setting it is racy, so all the
socket code, etc still needs to be able to cope with the cases
where they miss reading it.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| f39c1bfb5a03e2d255451bff05be0d7255298fa4 |
|
07-Sep-2012 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Fix a UDP transport regression
Commit 43cedbf0e8dfb9c5610eb7985d5f21263e313802 (SUNRPC: Ensure that
we grab the XPRT_LOCK before calling xprt_alloc_slot) is causing
hangs in the case of NFS over UDP mounts.
Since neither the UDP or the RDMA transport mechanism use dynamic slot
allocation, we can skip grabbing the socket lock for those transports.
Add a new rpc_xprt_op to allow switching between the TCP and UDP/RDMA
case.
Note that the NFSv4.1 back channel assigns the slot directly
through rpc_run_bc_task, so we can ignore that case.
Reported-by: Dick Streefland <dick.streefland@altium.nl>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@vger.kernel.org [>= 3.1]
|
| 2c53040f018b6c36a46eec75b9b937aaa5f78e6d |
|
10-Jul-2012 |
Ben Hutchings <bhutchings@solarflare.com> |
net: Fix (nearly-)kernel-doc comments for various functions
Fix incorrect start markers, wrapped summary lines, missing section
breaks, incorrect separators, and some name mismatches.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
| 1afeaf5c29aa07db25760d2fbed5c08a3aec3498 |
|
19-May-2012 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
sunrpc: fix loss of task->tk_status after rpc_delay call in xprt_alloc_slot
xprt_alloc_slot will call rpc_delay() to make the task wait a bit before
retrying when it gets back an -ENOMEM error from xprt_dynamic_alloc_slot.
The problem is that rpc_delay will clear the task->tk_status, causing
call_reserveresult to abort the task.
The solution is simply to let call_reserveresult handle the ENOMEM error
directly.
Reported-by: Jeff Layton <jlayton@redhat.com>
Cc: stable@vger.kernel.org [>= 3.1]
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 6b34309936ed5c85cbe5868655814065f42c2f38 |
|
16-May-2012 |
Jeff Layton <jlayton@redhat.com> |
sunrpc: suppress page allocation warnings in xprt_alloc_slot()
It's easily possible for these allocations to fail since we're using
GFP_NOWAIT here. We don't want to spam the logs with warnings about
that though.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 95c961747284a6b83a5e2d81240e214b0fa3464d |
|
15-Apr-2012 |
Eric Dumazet <eric.dumazet@gmail.com> |
net: cleanup unsigned to unsigned int
Use of "unsigned int" is preferred to bare "unsigned" in net tree.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
| 4e0038b6b246e4145fc4a53dca61a556d17bc52c |
|
01-Mar-2012 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Move clnt->cl_server into struct rpc_xprt
When the cl_xprt field is updated, the cl_server field will also have
to change. Since the contents of cl_server follow the remote endpoint
of cl_xprt, just move that field to the rpc_xprt.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
[ cel: simplify check_gss_callback_principal(), whitespace changes ]
[ cel: forward ported to 3.4 ]
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 0a702195234eb77c4097148285cccf7f095de9cf |
|
17-Feb-2012 |
Weston Andros Adamson <dros@netapp.com> |
NFS: include filelayout DS rpc stats in mountstats
Include RPC statistics from all data servers in /proc/self/mountstats for pNFS
filelayout mounts.
Signed-off-by: Weston Andros Adamson <dros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 15a4520621824a3c2eb2de2d1f3984bc1663d3c8 |
|
14-Feb-2012 |
Andy Adamson <andros@netapp.com> |
SUNRPC: add sending,pending queue and max slot to xprt stats
With static RPC slots, the xprt backlog queue stats were useful in showing
when the transport (TCP) was starved by lack of RPC slots. The new dynamic
RPC slot code, commit d9ba131d8f58c0d2ff5029e7002ab43f913b36f9, always
provides an RPC slot and so only uses the xprt backlog queue when the
tcp_max_slot_table_entries value has been hit or when an allocation error
occurs. All requests are now placed on the xprt sending or pending queue which
need to be monitored for debugging.
The max_slot stat shows the maximum number of dynamic RPC slots reached which is
useful when debugging performance issues.
Add the new fields at the end of the mountstats xprt stanza so that mountstats
outputs the previous correct values and ignores the new fields. Bump
NFS_IOSTATS_VERS.
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 87e3c0553fcbea79bf9f17fc5694484ecf3ae5e8 |
|
01-Feb-2012 |
Dan Carpenter <dan.carpenter@oracle.com> |
SUNRPC: remove an unneeded NULL check in xprt_connect()
We check "task->tk_rqstp" and then we dereference it without checking on
the next line. The only caller is call_connect() and that has a check
which prevents it from calling xprt_connect() with a NULL.
if (task->tk_status < 0)
return;
If "task->tk_rqstp" were NULL then "tk_status" would be -EAGAIN.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 961a828df64979d2a9faeeeee043391670a193b9 |
|
18-Jan-2012 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Fix potential races in xprt_lock_write_next()
We have to ensure that the wake up from the waitqueue and the assignment
of xprt->snd_task are atomic. We can do this by assigning the snd_task
while under the waitqueue spinlock.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| c25573b5134294c0be82bfaecc6d08136835b271 |
|
01-Dec-2011 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Ensure we always bump the backlog queue in xprt_free_slot
Whenever we free a slot, we know that the resulting xprt->num_reqs will
be less than xprt->max_reqs, so we know that we can release at least one
backlogged rpc_task.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@vger.kernel.org [>=3.1]
|
| 177c27bf05d0ea508e65afdbe4b6998c81e46af5 |
|
28-Jul-2011 |
Randy Dunlap <rdunlap@xenotime.net> |
net: fix new sunrpc kernel-doc warning
Fix new kernel-doc warning in sunrpc:
Warning(net/sunrpc/xprt.c:196): No description found for parameter 'xprt'
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
| 34006cee28f7344f9557a4be3816c7891b1bbab1 |
|
18-Jul-2011 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Replace xprt->resend and xprt->sending with a priority queue
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| d9ba131d8f58c0d2ff5029e7002ab43f913b36f9 |
|
18-Jul-2011 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Support dynamic slot allocation for TCP connections
Allow the number of available slots to grow with the TCP window size.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 21de0a955f3af29fa1100d96f66e6adade89e77a |
|
17-Jul-2011 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Clean up the slot table allocation
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 8d9266ffe4332afc5ac9de401ef6f825b3798585 |
|
17-Jul-2011 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Initalise the struct xprt upon allocation
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 43cedbf0e8dfb9c5610eb7985d5f21263e313802 |
|
17-Jul-2011 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Ensure that we grab the XPRT_LOCK before calling xprt_alloc_slot
This throttles the allocation of new slots when the socket is busy
reconnecting and/or is out of buffer space.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 9e00abc3c20904fd6a5d888bb7023925799ec8a5 |
|
14-Jul-2011 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: sunrpc should not explicitly depend on NFS config options
Change explicit references to CONFIG_NFS_V4_1 to implicit ones
Get rid of the unnecessary defines in backchannel_rqst.c and
bc_svc.c: the Makefile takes care of those dependency.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 468f86134ee515234afe5c5b3f39f266c50e61a5 |
|
18-Apr-2011 |
Bryan Schumaker <bjschuma@netapp.com> |
NFSv4.1: Don't update sequence number if rpc_task is not sent
If we fail to contact the gss upcall program, then no message will
be sent to the server. The client still updated the sequence number,
however, and this lead to NFS4ERR_SEQ_MISMATCH for the next several
RPC calls.
Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| ba3c578de274a5438bafbce03f9225936698051c |
|
16-Mar-2011 |
j223yang@asset.uwaterloo.ca <j223yang@asset.uwaterloo.ca> |
xprt: remove redundant check
remove redundant check.
Signed-off-by: Jinqiu Yang <crindy646@gmail.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| a8de240a9074b72b156d9e6d53f00076e6cd5f03 |
|
16-Mar-2011 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Convert struct rpc_xprt to use atomic_t counters
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 4d4a76f3309edc671918a767b336492fbc80a16d |
|
10-Mar-2011 |
j223yang@asset.uwaterloo.ca <j223yang@asset.uwaterloo.ca> |
xprt: remove redundant null check
'req' is dereferenced before checked for NULL.
The patch simply removes the check.
Signed-off-by: Jinqiu Yang<crindy646@gmail.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| f0418aa4b1103f959d64dc18273efa04ee0140e9 |
|
08-Dec-2010 |
J. Bruce Fields <bfields@redhat.com> |
rpc: allow xprt_class->setup to return a preexisting xprt
This allows us to reuse the xprt associated with a server connection if
one has already been set up.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
|
| 99de8ea962bbc11a51ad4c52e3dc93bee5f6ba70 |
|
08-Dec-2010 |
J. Bruce Fields <bfields@redhat.com> |
rpc: keep backchannel xprt as long as server connection
Multiple backchannels can share the same tcp connection; from rfc 5661 section
2.10.3.1:
A connection's association with a session is not exclusive. A
connection associated with the channel(s) of one session may be
simultaneously associated with the channel(s) of other sessions
including sessions associated with other client IDs.
However, multiple backchannels share a connection, they must all share
the same xid stream (hence the same rpc_xprt); the only way we have to
match replies with calls at the rpc layer is using the xid.
So, keep the rpc_xprt around as long as the connection lasts, in case
we're asked to use the connection as a backchannel again.
Requests to create new backchannel clients over a given server
connection should results in creating new clients that reuse the
existing rpc_xprt.
But to start, just reject attempts to associate multiple rpc_xprt's with
the same underlying bc_xprt.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
|
| 8f3a6de313391b6910aa7db185eb9f3e930a51cf |
|
05-Oct-2010 |
Pavel Emelyanov <xemul@parallels.com> |
sunrpc: Turn list_for_each-s into the ..._entry-s
Saves some lines of code and some branticks when reading one.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
|
| f10fef38d2d1605c977346457d0adb0919d0bbe7 |
|
05-Oct-2010 |
Pavel Emelyanov <xemul@parallels.com> |
sunrpc: Remove useless if (task == NULL) from xprt_reserve_xprt
The task in question is dereferenced above (and is actually never NULL).
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
|
| 37aa2133731d9231eb834f700119f0d3f1ed2664 |
|
29-Sep-2010 |
Pavel Emelyanov <xemul@parallels.com> |
sunrpc: Tag rpc_xprt with net
The net is known from the xprt_create and this tagging will also
give un the context in the conntection workers where real sockets
are created.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
|
| e204e621b4160c802315bc2d0fa335337c0d62e8 |
|
29-Sep-2010 |
Pavel Emelyanov <xemul@parallels.com> |
sunrpc: Factor out rpc_xprt freeing
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
|
| bd1722d4316e42a12fe6337ebe34d7e1e2c088b2 |
|
29-Sep-2010 |
Pavel Emelyanov <xemul@parallels.com> |
sunrpc: Factor out rpc_xprt allocation
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
|
| c3ae62ae08bb0db3639d8c579e4ff0967d908199 |
|
03-Aug-2010 |
J. Bruce Fields <bfields@redhat.com> |
SUNRPC: prevent task_cleanup running on freed xprt
We saw a report of a NULL dereference in xprt_autoclose:
https://bugzilla.redhat.com/show_bug.cgi?id=611938
This appears to be the result of an xprt's task_cleanup running after
the xprt is destroyed. Nothing in the current code appears to prevent
that.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| a17c2153d2e271b0cbacae9bed83b0eaa41db7e1 |
|
31-Jul-2010 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Move the bound cred to struct rpc_rqst
This will allow us to save the original generic cred in rpc_message, so
that if we migrate from one server to another, we can generate a new bound
cred without having to punt back to the NFS layer.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| ef7ffe8f06895312aeb08a5f8a1d4c90e34335ea |
|
24-May-2010 |
Alex Riesen <raa.lkml@gmail.com> |
sunrpc: use formatting of module name in SUNRPC
gcc-4.3.3 produces the warning:
"format not a string literal and no format arguments"
Signed-off-by: Alex Riesen <raa.lkml@gmail.com>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Chuck Lever <cel@citi.umich.edu>
Cc: David S. Miller <davem@davemloft.net>
Acked-by: Tom Talpey <tmtalpey@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
| 3fa21e07e6acefa31f974d57fba2b6920a7ebd1a |
|
18-May-2010 |
Joe Perches <joe@perches.com> |
net: Remove unnecessary returns from void function()s
This patch removes from net/ (but not any netfilter files)
all the unnecessary return; statements that precede the
last closing brace of void functions.
It does not remove the returns that are immediately
preceded by a label as gcc doesn't like that.
Done via:
$ grep -rP --include=*.[ch] -l "return;\n}" net/ | \
xargs perl -i -e 'local $/ ; while (<>) { s/\n[ \t\n]+return;\n}/\n}/g; print; }'
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
| d60dbb20a74c2cfa142be0a34dac3c6547ea086c |
|
13-May-2010 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Move the task->tk_bytes_sent and tk_rtt to struct rpc_rqst
It seems strange to maintain stats for bytes_sent in one structure, and
bytes received in another. Try to assemble all the RPC request-related
stats in struct rpc_rqst
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| ff8399709e41bf72b4cb145612a0f9a9f7283c83 |
|
07-May-2010 |
Chuck Lever <chuck.lever@oracle.com> |
SUNRPC: Replace jiffies-based metrics with ktime-based metrics
Currently RPC performance metrics that tabulate elapsed time use
jiffies time values. This is problematic on systems that use slow
jiffies (for instance 100HZ systems built for paravirtualized
environments). It is also a problem for computing precise latency
statistics for advanced network transports, such as InfiniBand,
that can have round-trip latencies significanly faster than a single
clock tick.
For the RPC client, adopt the high resolution time stamp mechanism
already used by the network layer and blktrace: ktime.
We use ktime format time stamps for all internal computations, and
convert to milliseconds for presentation. As a result, we need only
addition operations in the performance critical paths; multiply/divide
is required only for presentation.
We could report RTT metrics in microseconds. In fact the mountstats
format is versioned to accomodate exactly this kind of interface
improvement.
For now, however, we'll stay with millisecond precision for
presentation to maintain backwards compatibility with the handful of
currently deployed user space tools. At a later point, we'll move to
an API such as BDI_STATS where a finer timestamp precision can be
reported.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| bbc72cea58f671665b6362be0d4e391813ac0eee |
|
07-May-2010 |
Chuck Lever <chuck.lever@oracle.com> |
SUNRPC: RPC metrics and RTT estimator should use same RTT value
Compute an RPC request's RTT once, and use that value both for reporting
RPC metrics, and for adjusting the RTT context used by the RPC client's RTT
estimator algorithm.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| a8ce4a8f37fef0a09a1e920c2e09f67a80426c7e |
|
16-Apr-2010 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Fail over more quickly on connect errors
We should not allow soft tasks to wait for longer than the major timeout
period when waiting for a reconnect to occur.
Remove the field xprt->connect_timeout since it has been obsoleted by
xprt->reestablish_timeout.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 0b9e79431377df452348e78262dd5a3dc359eeef |
|
16-Apr-2010 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Move the test for XPRT_CONNECTING into xprt_connect()
This fixes a bug with setting xprt->stat.connect_start.
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| ee5ebe851ed60206f150d3f189416f9c63245b66 |
|
16-Apr-2010 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Clean up xprt_release()
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 0eae88f31ca2b88911ce843452054139e028771f |
|
21-Apr-2010 |
Eric Dumazet <eric.dumazet@gmail.com> |
net: Fix various endianness glitches
Sparse can help us find endianness bugs, but we need to make some
cleanups to be able to more easily spot real bugs.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
| c9acb42ef1904d15d0fb315061cefbe638f67f3a |
|
19-Mar-2010 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Fix a use after free bug with the NFSv4.1 backchannel
The ->release_request() callback was designed to allow the transport layer
to do housekeeping after the RPC call is done. It cannot be used to free
the request itself, and doing so leads to a use-after-free bug in
xprt_release().
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| feb8ca37cc3d83c07fd042509ef1e176cfeb2cfa |
|
03-Dec-2009 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Ensure that we honour autoclose before attempting to reconnect
If the XPRT_CLOSE_WAIT flag is set, we need to ensure that we call
xprt->ops->close() while holding xprt_lock_write() before we can
start reconnecting.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 4cfc7e6019caa3e97d2a81c48c8d575d7b38d751 |
|
10-Sep-2009 |
Rahul Iyer <iyer@netapp.com> |
nfsd41: sunrpc: Added rpc server-side backchannel handling
When the call direction is a reply, copy the xid and call direction into the
req->rq_private_buf.head[0].iov_base otherwise rpc_verify_header returns
rpc_garbage.
Signed-off-by: Rahul Iyer <iyer@netapp.com>
Signed-off-by: Mike Sager <sager@netapp.com>
Signed-off-by: Marc Eshel <eshel@almaden.ibm.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[get rid of CONFIG_NFSD_V4_1]
[sunrpc: refactoring of svc_tcp_recvfrom]
[nfsd41: sunrpc: create common send routine for the fore and the back channels]
[nfsd41: sunrpc: Use free_page() to free server backchannel pages]
[nfsd41: sunrpc: Document server backchannel locking]
[nfsd41: sunrpc: remove bc_connect_worker()]
[nfsd41: sunrpc: Define xprt_server_backchannel()[
[nfsd41: sunrpc: remove bc_close and bc_init_auto_disconnect dummy functions]
[nfsd41: sunrpc: eliminate unneeded switch statement in xs_setup_tcp()]
[nfsd41: sunrpc: Don't auto close the server backchannel connection]
[nfsd41: sunrpc: Remove unused functions]
Signed-off-by: Alexandros Batsakis <batsakis@netapp.com>
Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfsd41: change bc_sock to bc_xprt]
[nfsd41: sunrpc: move struct rpc_buffer def into a common header file]
[nfsd41: sunrpc: use rpc_sleep in bc_send_request so not to block on mutex]
[removed cosmetic changes]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[sunrpc: add new xprt class for nfsv4.1 backchannel]
[sunrpc: v2.1 change handling of auto_close and init_auto_disconnect operations for the nfsv4.1 backchannel]
Signed-off-by: Alexandros Batsakis <batsakis@netapp.com>
[reverted more cosmetic leftovers]
[got rid of xprt_server_backchannel]
[separated "nfsd41: sunrpc: add new xprt class for nfsv4.1 backchannel"]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Cc: Trond Myklebust <trond.myklebust@netapp.com>
[sunrpc: change idle timeout value for the backchannel]
Signed-off-by: Alexandros Batsakis <batsakis@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Acked-by: Trond Myklebust <trond.myklebust@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
|
| dd2b63d049480979016b959abc2d141cdddb1389 |
|
01-Apr-2009 |
Ricardo Labiaga <Ricardo.Labiaga@netapp.com> |
nfs41: Rename rq_received to rq_reply_bytes_recvd
The 'rq_received' member of 'struct rpc_rqst' is used to track when we
have received a reply to our request. With v4.1, the backchannel
can now accept callback requests over the existing connection. Rename
this field to make it clear that it is only used for tracking reply bytes
and not all bytes received on the connection.
Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
|
| 343952fa5aac888934ffc203abed26a823400eb6 |
|
01-Apr-2009 |
Rahul Iyer <iyer@netapp.com> |
nfs41: Get the rpc_xprt * from the rpc_rqst instead of the rpc_clnt.
Obtain the rpc_xprt from the rpc_rqst so that calls and callback replies
can both use the same code path. A client needs the rpc_xprt in order
to reply to a callback.
Signed-off-by: Rahul Iyer <iyer@netapp.com>
Signed-off-by: Ricardo Labiaga <ricardo.labiaga@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
|
| 55ae1aabfb108106dd095de2578ceef1c755a8b8 |
|
01-Apr-2009 |
Ricardo Labiaga <Ricardo.Labiaga@netapp.com> |
nfs41: Add backchannel processing support to RPC state machine
Adds rpc_run_bc_task() which is called by the NFS callback service to
process backchannel requests. It performs similar work to rpc_run_task()
though "schedules" the backchannel task to be executed starting at the
call_trasmit state in the RPC state machine.
It also introduces some miscellaneous updates to the argument validation,
call_transmit, and transport cleanup functions to take into account
that there are now forechannel and backchannel tasks.
Backchannel requests do not carry an RPC message structure, since the
payload has already been XDR encoded using the existing NFSv4 callback
mechanism.
Introduce a new transmit state for the client to reply on to backchannel
requests. This new state simply reserves the transport and issues the
reply. In case of a connection related error, disconnects the transport and
drops the reply. It requires the forechannel to re-establish the connection
and the server to retransmit the request, as stated in NFSv4.1 section
2.9.2 "Client and Server Transport Behavior".
Note: There is no need to loop attempting to reserve the transport. If EAGAIN
is returned by xprt_prepare_transmit(), return with tk_status == 0,
setting tk_action to call_bc_transmit. rpc_execute() will invoke it again
after the task is taken off the sleep queue.
[nfs41: rpc_run_bc_task() need not be exported outside RPC module]
[nfs41: New call_bc_transmit RPC state]
Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfs41: Backchannel: No need to loop in call_bc_transmit()]
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[rpc_count_iostats incorrectly exits early]
Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[Convert rpc_reply_expected() to inline function]
[Remove unnecessary BUG_ON()]
[Rename variable]
Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
|
| f9acac1a4710ce88871f1ae323fc91c1cb6e9d52 |
|
01-Apr-2009 |
Ricardo Labiaga <Ricardo.Labiaga@netapp.com> |
nfs41: Initialize new rpc_xprt callback related fields
Signed-off-by: Ricardo Labiaga <ricardo.labiaga@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
|
| f75e6745aa3084124ae1434fd7629853bdaf6798 |
|
21-Apr-2009 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Fix the problem of EADDRNOTAVAIL syslog floods on reconnect
See http://bugzilla.kernel.org/show_bug.cgi?id=13034
If the port gets into a TIME_WAIT state, then we cannot reconnect without
binding to a new port.
Tested-by: Petr Vandrovec <petr@vandrovec.name>
Tested-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
| 2a4919919a97911b0aa4b9f5ac1eab90ba87652b |
|
11-Mar-2009 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Return EAGAIN instead of ENOTCONN when waking up xprt->pending
While we should definitely return socket errors to the task that is
currently trying to send data, there is no need to propagate the same error
to all the other tasks on xprt->pending. Doing so actually slows down
recovery, since it causes more than one tasks to attempt socket recovery.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| c8485e4d634f6df155040293928707f127f0d06d |
|
11-Mar-2009 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Handle ECONNREFUSED correctly in xprt_transmit()
If we get an ECONNREFUSED error, we currently go to sleep on the
'xprt->sending' wait queue. The problem is that no timeout is set there,
and there is nothing else that will wake the task up later.
We should deal with ECONNREFUSED in call_status, given that is where we
also deal with -EHOSTDOWN, and friends.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 441e3e242903f9b190d5764bed73edb58f977413 |
|
11-Mar-2009 |
Tom Talpey <tmtalpey@gmail.com> |
SUNRPC: dynamically load RPC transport modules on-demand
Provide an api to attempt to load any necessary kernel RPC
client transport module automatically. By convention, the
desired module name is "xprt"+"transport name". For example,
when NFS mounting with "-o proto=rdma", attempt to load the
"xprtrdma" module.
Signed-off-by: Tom Talpey <tmtalpey@gmail.com>
Cc: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 01d37c428ae080563c0a3bb8bdfa88c65a6891d3 |
|
11-Mar-2009 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: xprt_connect() don't abort the task if the transport isn't bound
If the transport isn't bound, then we should just return ENOTCONN, letting
call_connect_status() and/or call_status() deal with retrying. Currently,
we appear to abort all pending tasks with an EIO error.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| c9f6cde6e26ef98ee9c4b6288b126ac9c580d88b |
|
31-Jul-2008 |
Denis V. Lunev <den@openvz.org> |
sunrpc: do not pin sunrpc module in the memory
Basically, try_module_get here are pretty useless. Any other module using
this API will pin sunrpc in memory due using exported symbols.
Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| b22602a673b1743bba4b62bb404ffd3b269d2f09 |
|
06-Jun-2008 |
Chuck Lever <chuck.lever@oracle.com> |
SUNRPC: Ensure all transports set rq_xtime consistently
The RPC client uses the rq_xtime field in each RPC request to determine the
round-trip time of the request. Currently, the rq_xtime field is
initialized by each transport just before it starts enqueing a request to
be sent. However, transports do not handle initializing this value
consistently; sometimes they don't initialize it at all.
To make the measurement of request round-trip time consistent for all
RPC client transport capabilities, pull rq_xtime initialization into the
RPC client's generic transport logic. Now all transports will get a
standardized RTT measure automatically, from:
xprt_transmit()
to
xprt_complete_rqst()
This makes round-trip time calculation more accurate for the TCP transport.
The socket ->sendmsg() method can return "-EAGAIN" if the socket's output
buffer is full, so the TCP transport's ->send_request() method may call
the ->sendmsg() method repeatedly until it gets all of the request's bytes
queued in the socket's buffer.
Currently, the TCP transport sets the rq_xtime field every time through
that loop so the final value is the timestamp just before the *last* call
to the underlying socket's ->sendmsg() method. After this patch, the
rq_xtime field contains a timestamp that reflects the time just before the
*first* call to ->sendmsg().
This is consequential under heavy workloads because large requests often
take multiple ->sendmsg() calls to get all the bytes of a request queued.
The TCP transport causes the request to sleep until the remote end of the
socket has received enough bytes to clear space in the socket's local
output buffer. This delay can be quite significant.
The method introduced by this patch is a more accurate measure of RTT
for stream transports, since the server can cause enough back pressure
to delay (ie increase the latency of) requests from the client.
Additionally, this patch corrects the behavior of the RDMA transport, which
entirely neglected to initialize the rq_xtime field. RPC performance
metrics for RDMA transports now display correct RPC request round trip
times.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Acked-by: Tom Talpey <thomas.talpey@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| cd983ef81b9d79573848dabf81277c7314220257 |
|
11-Jun-2008 |
Chuck Lever <chuck.lever@oracle.com> |
SUNRPC: Remove obsolete messages during transport connect
Recent changes to the RPC client's transport connect logic make connect
status values ECONNREFUSED and ECONNRESET impossible.
Clean up xprt_connect_status() to account for these changes.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 0b80ae4201e5128e16e5161825f5cd377a5d1fee |
|
27-Apr-2008 |
Randy Dunlap <randy.dunlap@oracle.com> |
sunrpc: fix missing kernel-doc
Fix missing sunrpc kernel-doc:
Warning(linux-2.6.25-git7//net/sunrpc/xprt.c:451): No description found for parameter 'action'
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
| 7c1d71cf56feebfb5b98219b9d11dfc3a2feca62 |
|
17-Apr-2008 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Don't disconnect more than once if retransmitting NFSv4 requests
NFSv4 requires us to ensure that we break the TCP connection before we're
allowed to retransmit a request. However in the case where we're
retransmitting several requests that have been sent on the same
connection, we need to ensure that we don't interfere with the attempt to
reconnect and/or break the connection again once it has been established.
We therefore introduce a 'connection' cookie that is bumped every time a
connection is broken. This allows requests to track if they need to force a
disconnection.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 636ac43318ce6939c1698fb67e714d421314ed71 |
|
17-Apr-2008 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Remove the unused export of xprt_force_disconnect
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 1e799b673c6b82b336ab13c48b5651d511ca3000 |
|
21-Mar-2008 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Fix read ordering problems with req->rq_private_buf.len
We want to ensure that req->rq_private_buf.len is updated before
req->rq_received, so that call_decode() doesn't use an old value for
req->rq_rcv_buf.len.
In 'call_decode()' itself, instead of using task->tk_status (which is set
using req->rq_received) must use the actual value of
req->rq_private_buf.len when deciding whether or not the received RPC reply
is too short.
Finally ensure that we set req->rq_rcv_buf.len to zero when retrying a
request. A typo meant that we were resetting req->rq_private_buf.len in
call_decode(), and then clobbering that value with the old rq_rcv_buf.len
again in xprt_transmit().
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| b6ddf64ffe9d59577a9176856bb6fe69a539f573 |
|
18-Apr-2008 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Fix up xprt_write_space()
The rest of the networking layer uses SOCK_ASYNC_NOSPACE to signal whether
or not we have someone waiting for buffer memory. Convert the SUNRPC layer
to use the same idiom.
Remove the unlikely()s in xs_udp_write_space and xs_tcp_write_space. In
fact, the most common case will be that there is nobody waiting for buffer
space.
SOCK_NOSPACE is there to tell the TCP layer whether or not the cwnd was
limited by the application window. Ensure that we follow the same idiom as
the rest of the networking layer here too.
Finally, ensure that we clear SOCK_ASYNC_NOSPACE once we wake up, so that
write_space() doesn't keep waking things up on xprt->pending.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| f6a1cc89309f0ae847a9b6fe418d1c4215e5bc55 |
|
22-Feb-2008 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Add a (empty for the moment) destructor for rpc_wait_queues
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 5d00837b90340af9106dcd93af75fd664c8eb87f |
|
22-Feb-2008 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Run rpc timeout functions as callbacks instead of in softirqs
An audit of the current RPC timeout functions shows that they don't really
ever need to run in the softirq context. As long as the softirq is
able to signal that the wakeup is due to a timeout (which it can do by
setting task->tk_status to -ETIMEDOUT) then the callback functions can just
run as standard task->tk_callback functions (in the rpciod/process
context).
The only possible border-line case would be xprt_timer() for the case of
UDP, when the callback is used to reduce the size of the transport
congestion window. In testing, however, the effect of moving that update
to a callback would appear to be minor.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| fda1393938035559b417dd5b26b9cc293a7aee00 |
|
22-Feb-2008 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Convert users of rpc_wake_up_task to use rpc_wake_up_queued_task
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| fde95c7554aa77f9a242f32b0b5f8f15395abf52 |
|
22-Feb-2008 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Clean up rpc_run_timer()
All RPC timeout callback functions are expected to wake the task up. We can
enforce this by moving the wakeup back into rpc_run_timer.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 65b6e42cdc5b6a1ce2ada31cc294d7e60b22bb43 |
|
14-Feb-2008 |
Randy Dunlap <randy.dunlap@oracle.com> |
docbook: sunrpc filenames and notation fixes
Use updated file list for docbook files and
fix kernel-doc warnings in sunrpc:
Warning(linux-2.6.24-git12//net/sunrpc/rpc_pipe.c:689): No description found for parameter 'rpc_client'
Warning(linux-2.6.24-git12//net/sunrpc/rpc_pipe.c:765): No description found for parameter 'flags'
Warning(linux-2.6.24-git12//net/sunrpc/clnt.c:584): No description found for parameter 'tk_ops'
Warning(linux-2.6.24-git12//net/sunrpc/clnt.c:618): No description found for parameter 'bufsize'
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Neil Brown <neilb@suse.de>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
| ba7392bb37cb12781890f45d7ddee1618e33a036 |
|
20-Dec-2007 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Add support for per-client timeout values
In order to be able to support setting the timeo and retrans parameters on
a per-mountpoint basis, we move the rpc_timeout structure into the
rpc_clnt.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 2881ae74e68ecfe3b32a90936e5d93a9ba598c3a |
|
20-Dec-2007 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Clean up the transport timeout initialisation
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| e8914c65f7f8d4e8701b8e78a12b714872ea0402 |
|
14-Jul-2007 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Restrict sunrpc client exports
The sunrpc client exports are not meant to be part of any official kernel
API: they can change at the drop of a hat. Mark them as internal functions
using EXPORT_SYMBOL_GPL.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| a6eaf8bdf9308b51ec84e358915fc65400029519 |
|
14-Jul-2007 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Move exported declarations to the function declarations
Do this for all RPC client related functions and XDR functions.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 62da3b24880bccd4ffc32cf8d9a7e23fab475bdd |
|
07-Nov-2007 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Rename xprt_disconnect()
xprt_disconnect() should really only be called when the transport shutdown
is completed, and it is time to wake up any pending tasks. Rename it to
xprt_disconnect_done() in order to reflect the semantical change.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 7272dcd31d56580dee7693c21e369fd167e137fe |
|
07-Nov-2007 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: xprt_autoclose() should not call xprt_disconnect()
The transport layer should do that itself whenever appropriate.
Note that the RDMA transport already assumes that it needs to call
xprt_disconnect in xprt_rdma_close().
For TCP sockets, we want to call xprt_disconnect() only after the
connection has been closed by both ends.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 66af1e558538137080615e7ad6d1f2f80862de01 |
|
06-Nov-2007 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Fix a race in xs_tcp_state_change()
When scheduling the autoclose RPC call, we want to ensure that we don't
race against the test_bit() call in xprt_clear_locked().
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| b24b8a247ff65c01b252025926fe564209fae4fc |
|
24-Jan-2008 |
Pavel Emelyanov <xemul@openvz.org> |
[NET]: Convert init_timer into setup_timer
Many-many code in the kernel initialized the timer->function
and timer->data together with calling init_timer(timer). There
is already a helper for this. Use it for networking code.
The patch is HUGE, but makes the code 130 lines shorter
(98 insertions(+), 228 deletions(-)).
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
| 5ba03e82b3dac41bb1c5ca29060aa44b5e44b486 |
|
22-Nov-2007 |
Jiri Slaby <jirislaby@gmail.com> |
[SUNRPC]: Remove SPIN_LOCK_UNLOCKED
SPIN_LOCK_UNLOCKED is deprecated, use DEFINE_SPINLOCK instead
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
|
| 4fa016eb248cac875541fa199af550a8aefa0e90 |
|
10-Sep-2007 |
\"Talpey, Thomas\ <Thomas.Talpey@netapp.com> |
NFS/SUNRPC: support transport protocol naming
To prepare for including non-sockets-based RPC transports, select
RPC transports by an identifier (to be used in following patches).
Signed-off-by: Tom Talpey <tmt@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 3c341b0b925eee01daae2c594b81e673f659d7cd |
|
10-Sep-2007 |
\"Talpey, Thomas\ <Thomas.Talpey@netapp.com> |
SUNRPC: rename the rpc_xprtsock_create structure
To prepare for including non-sockets-based RPC transports, change the
overly suggestive name of the transport creation arguments struct.
Signed-off-by: Tom Talpey <tmt@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| bc25571e21e8bd053554209f5b1b228ad71e6b99 |
|
10-Sep-2007 |
\"Talpey, Thomas\ <Thomas.Talpey@netapp.com> |
SUNRPC: Finish API to load RPC transport implementations dynamically
Allow RPC client transport implementations to be loaded as needed, or
as they become available from distributors or third-party vendors.
Note that we leave the IP sockets implementation in sunrpc.o
permanently, as IP functionality is always available in any
kernel that runs NFS.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Tom Talpey <tmt@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 81c098af3da7981902e9f8163aeccc2467c4ba6d |
|
10-Sep-2007 |
\"Talpey, Thomas\ <Thomas.Talpey@netapp.com> |
SUNRPC: Provide a new API for registering transport implementations
To allow transport capabilities to be loaded dynamically, provide an API
for registering and unregistering the transports with the RPC client.
Eventually xprt_create_transport() will be changed to search the list of
registered transports when initializing a fresh transport.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Tom Talpey <tmt@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 1244480976d357447aeddd3f44977586bfa0462b |
|
10-Sep-2007 |
\"Talpey, Thomas\ <Thomas.Talpey@netapp.com> |
SUNRPC: add EXPORT_SYMBOL_GPL for generic transport functions
SUNRPC: add EXPORT_SYMBOL_GPL for generic transport functions
As a preface to allowing arbitrary transport modules to be loaded
dynamically, add EXPORT_SYMBOL_GPL for all generic transport functions
that a transport implementation might want to use.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Acked-by: Tom Talpey <tmt@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 96802a095171f5b35cf0e1e0d4be943e6696a253 |
|
08-Jul-2007 |
Frank van Maarseveen <frankvm@frankvm.com> |
SUNRPC: cleanup transport creation argument passing
Cleanup argument passing to functions for creating an RPC transport.
Signed-off-by: Frank van Maarseveen <frankvm@frankvm.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| c1384c9c4c184543375b52a0997d06cd98145164 |
|
15-Jun-2007 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: fix hang due to eventd deadlock...
Brian Behlendorf writes:
The root cause of the NFS hang we were observing appears to be a rare
deadlock between the kernel provided usermodehelper API and the linux NFS
client. The deadlock can arise because both of these services use the
generic linux work queues. The usermodehelper API run the specified user
application in the context of the work queue. And NFS submits both cleanup
and reconnect work to the generic work queue for handling. Normally this
is fine but a deadlock can result in the following situation.
- NFS client is in a disconnected state
- [events/0] runs a usermodehelper app with an NFS dependent operation,
this triggers an NFS reconnect.
- NFS reconnect happens to be submitted to [events/0] work queue.
- Deadlock, the [events/0] work queue will never process the
reconnect because it is blocked on the previous NFS dependent
operation which will not complete.`
The solution is simply to run reconnect requests on rpciod.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| a509050bd3b8e0aa269c2241aa10d74ca7701e2f |
|
29-Mar-2007 |
Chuck Lever <chuck.lever@oracle.com> |
SUNRPC: introduce rpcbind: replacement for in-kernel portmapper
Introduce a replacement for the in-kernel portmapper client that supports
all 3 versions of the rpcbind protocol. This code is not used yet.
Original code by Groupe Bull updated for the latest kernel, with multiple
bug fixes.
Note that rpcb_clnt.c does not yet support registering via versions 3 and
4 of the rpcbind protocol. That is planned for a later patch.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| c5a4dd8b7c15927a8fbff83171b57cad675a79b9 |
|
29-Mar-2007 |
Chuck Lever <chuck.lever@oracle.com> |
SUNRPC: Eliminate side effects from rpc_malloc
Currently rpc_malloc sets req->rq_buffer internally. Make this a more
generic interface: return a pointer to the new buffer (or NULL) and
make the caller set req->rq_buffer and req->rq_bufsize. This looks much
more like kmalloc and eliminates the side effects.
To fix a potential deadlock, this patch also replaces GFP_NOFS with
GFP_NOWAIT in rpc_malloc. This prevents async RPCs from sleeping outside
the RPC's task scheduler while allocating their buffer.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 2bea90d43a050bbc4021d44e59beb34f384438db |
|
29-Mar-2007 |
Chuck Lever <chuck.lever@oracle.com> |
SUNRPC: RPC buffer size estimates are too large
The RPC buffer size estimation logic in net/sunrpc/clnt.c always
significantly overestimates the requirements for the buffer size.
A little instrumentation demonstrated that in fact rpc_malloc was never
allocating the buffer from the mempool, but almost always called kmalloc.
To compute the size of the RPC buffer more precisely, split p_bufsiz into
two fields; one for the argument size, and one for the result size.
Then, compute the sum of the exact call and reply header sizes, and split
the RPC buffer precisely between the two. That should keep almost all RPC
buffers within the 2KiB buffer mempool limit.
And, we can finally be rid of RPC_SLACK_SPACE!
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 241c39b9ac4bf847013aa06cce6d4d61426a2006 |
|
20-Apr-2007 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
RPC: Fix the TCP resend semantics for NFSv4
Fix a regression due to the patch "NFS: disconnect before retrying NFSv4
requests over TCP"
The assumption made in xprt_transmit() that the condition
"req->rq_bytes_sent == 0 and request is on the receive list"
should imply that we're dealing with a retransmission is false.
Firstly, it may simply happen that the socket send queue was full
at the time the request was initially sent through xprt_transmit().
Secondly, doing this for each request that was retransmitted implies
that we disconnect and reconnect for _every_ request that happened to
be retransmitted irrespective of whether or not a disconnection has
already occurred.
Fix is to move this logic into the call_status request timeout handler.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
| 43d78ef2ba5bec26d0315859e8324bfc0be23766 |
|
07-Feb-2007 |
Chuck Lever <chuck.lever@oracle.com> |
NFS: disconnect before retrying NFSv4 requests over TCP
RFC3530 section 3.1.1 states an NFSv4 client MUST NOT send a request
twice on the same connection unless it is the NULL procedure. Section
3.1.1 suggests that the client should disconnect and reconnect if it
wants to retry a request.
Implement this by adding an rpc_clnt flag that an ULP can use to
specify that the underlying transport should be disconnected on a
major timeout. The NFSv4 client asserts this new flag, and requests
no retries after a minor retransmit timeout.
Note that disconnecting on a retransmit is in general not safe to do
if the RPC client does not reuse the TCP port number when reconnecting.
See http://bugzilla.linux-nfs.org/show_bug.cgi?id=6
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| cca5172a7ec10dfdb0b787cd8e9d5b0b8f179793 |
|
10-Feb-2007 |
YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> |
[NET] SUNRPC: Fix whitespace errors.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
| 46121cf7d85869bfe9588bac7ccf55aa0bc7f278 |
|
31-Jan-2007 |
Chuck Lever <chuck.lever@oracle.com> |
SUNRPC: fix print format for tk_pid
The tk_pid field is an unsigned short. The proper print format specifier for
that type is %5u, not %4d.
Also clean up some miscellaneous print formatting nits.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 5847e1f4d058677c5e46dc6c3e3c70e8855ea3ba |
|
05-Dec-2006 |
Chuck Lever <chuck.lever@oracle.com> |
SUNRPC: Remove pprintk() from net/sunrpc/xprt.c
These appear to be deprecated. Removing them also gets rid of some sparse
noise.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| c8541ecdd5692bcfbcb5305cab9a873288d29175 |
|
17-Oct-2006 |
Chuck Lever <chuck.lever@oracle.com> |
SUNRPC: Make the transport-specific setup routine allocate rpc_xprt
Change the location where the rpc_xprt structure is allocated so each
transport implementation can allocate a private area from the same
chunk of memory.
Note also that xprt->ops->destroy, rather than xprt_destroy, is now
responsible for freeing rpc_xprt when the transport is destroyed.
Test plan:
Connectathon.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 65f27f38446e1976cc98fd3004b110fedcddd189 |
|
22-Nov-2006 |
David Howells <dhowells@redhat.com> |
WorkStruct: Pass the work_struct pointer instead of context data
Pass the work_struct pointer to the work function rather than context data.
The work function can use container_of() to work out the data.
For the cases where the container of the work_struct may go away the moment the
pending bit is cleared, it is made possible to defer the release of the
structure by deferring the clearing of the pending bit.
To make this work, an extra flag is introduced into the management side of the
work_struct. This governs auto-release of the structure upon execution.
Ordinarily, the work queue executor would release the work_struct for further
scheduling or deallocation by clearing the pending bit prior to jumping to the
work function. This means that, unless the driver makes some guarantee itself
that the work_struct won't go away, the work function may not access anything
else in the work_struct or its container lest they be deallocated.. This is a
problem if the auxiliary data is taken away (as done by the last patch).
However, if the pending bit is *not* cleared before jumping to the work
function, then the work function *may* access the work_struct and its container
with no problems. But then the work function must itself release the
work_struct by calling work_release().
In most cases, automatic release is fine, so this is the default. Special
initiators exist for the non-auto-release case (ending in _NAR).
Signed-Off-By: David Howells <dhowells@redhat.com>
|
| d8ed029d6000ba2e2908d9286409e4833c091b4c |
|
27-Sep-2006 |
Alexey Dobriyan <adobriyan@gmail.com> |
[SUNRPC]: trivial endianness annotations
pure s/u32/__be32/
[AV: large part based on Alexey's patches]
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
| 6b6ca86b77b62b798cf9ca2599036420abce7796 |
|
05-Sep-2006 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Add refcounting to the struct rpc_xprt
In a subsequent patch, this will allow the portmapper to take a reference
to the rpc_xprt for which it is updating the port number, fixing an Oops.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| da45828e2835057045150b318c4fbe9bb91f18dd |
|
31-Aug-2006 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Clean up soft task error handling
- Ensure that the task aborts the RPC call only when it has actually timed out.
- Ensure that req->rq_majortimeo is initialised correctly.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| ff9aa5e56df60cc8565a93cc868fe25ae3f20e49 |
|
23-Aug-2006 |
Chuck Lever <chuck.lever@oracle.com> |
SUNRPC: Eliminate xprt_create_proto and rpc_create_client
The two function call API for creating a new RPC client is now obsolete.
Remove it.
Also, remove an unnecessary check to see whether the caller is capable of
using privileged network services. The kernel RPC client always uses a
privileged ephemeral port by default; callers are responsible for checking
the authority of users to make use of any RPC service, or for specifying
that a nonprivileged port is acceptable.
Test plan:
Repeated runs of Connectathon locking suite. Check network trace to ensure
correctness of NLM requests and replies.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| c2866763b4029411d166040306691773c12d4caf |
|
23-Aug-2006 |
Chuck Lever <chuck.lever@oracle.com> |
SUNRPC: use sockaddr + size when creating remote transport endpoints
Prepare for more generic transport endpoint handling needed by transports
that might use different forms of addressing, such as IPv6.
Introduce a single function call to replace the two-call
xprt_create_proto/rpc_create_client API. Define a new rpc_create_args
structure that allows callers to pass in remote endpoint addresses of
varying length.
Test-plan:
Compile kernel with CONFIG_NFS enabled.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| c4efcb1d3e0bc76aeb9ca6301d19a5079893c6c9 |
|
23-Aug-2006 |
Chuck Lever <chuck.lever@oracle.com> |
SUNRPC: Use "sockaddr_storage" for storing RPC client's remote peer address
IPv6 addresses are big (128 bytes). Now that no RPC client consumers treat
the addr field in rpc_xprt structs as an opaque, and access it only via the
API calls, we can safely widen the field in the rpc_xprt struct to
accomodate larger addresses.
Test plan:
Compile kernel with CONFIG_NFS enabled.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 4a68179d38874c37be2802442a71b847f5d1a2a9 |
|
23-Aug-2006 |
Chuck Lever <chuck.lever@oracle.com> |
SUNRPC: Make RPC portmapper use per-transport storage
Move connection and bind state that was maintained in the rpc_clnt
structure to the rpc_xprt structure. This will allow the creation of
a clean API for plugging in different types of bind mechanisms.
This brings improvements such as the elimination of a single spin lock to
control serialization for all in-kernel RPC binding. A set of per-xprt
bitops is used to serialize tasks during RPC binding, just like it now
works for making RPC transport connections.
Test-plan:
Destructive testing (unplugging the network temporarily). Connectathon
with UDP and TCP. NFSv2/3 and NFSv4 mounting should be carefully checked.
Probably need to rig a server where certain services aren't running, or
that returns an error for some typical operation.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| ec739ef03dc926d05051c8c5838971445504470a |
|
23-Aug-2006 |
Chuck Lever <chuck.lever@oracle.com> |
SUNRPC: Create a helper to tell whether a transport is bound
Hide the contents and format of xprt->addr by eliminating direct uses
of the xprt->addr.sin_port field. This change is required to support
alternate RPC host address formats (eg IPv6).
Test-plan:
Destructive testing (unplugging the network temporarily). Repeated runs of
Connectathon locking suite with UDP and TCP.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| e0ab53deaa91293a7958d63d5a2cf4c5645ad6f0 |
|
27-Jul-2006 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
RPC: Ensure that we disconnect TCP socket when client requests error out
If we're part way through transmitting a TCP request, and the client
errors, then we need to disconnect and reconnect the TCP socket in order to
avoid confusing the server.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
(cherry picked from 031a50c8b9ea82616abd4a4e18021a25848941ce commit)
|
| 0da974f4f303a6842516b764507e3c0a03f41e5a |
|
21-Jul-2006 |
Panagiotis Issaris <takis@issaris.org> |
[NET]: Conversions from kmalloc+memset to k(z|c)alloc.
Signed-off-by: Panagiotis Issaris <takis@issaris.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
| bf3fcf89552f24657bcfb6a9d73cd167ebb496c6 |
|
25-May-2006 |
Chuck Lever <cel@netapp.com> |
SUNRPC: NFS_ROOT always uses the same XIDs
The XID generator uses get_random_bytes to generate an initial XID.
NFS_ROOT starts up before the random driver, though, so get_random_bytes
doesn't set a random XID for NFS_ROOT. This causes NFS_ROOT mount points
to reuse XIDs every time the client is booted. If the client boots often
enough, the server will start serving old replies out of its DRC.
Use net_random() instead.
Test plan:
I/O intensive workloads should perform well and generate no errors. Traces
taken during client reboots should show that NFS_ROOT mounts use unique
XIDs after every reboot.
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 43ac3f2961b8616da26114ec6dc76ac2a61f76ad |
|
20-Mar-2006 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Fix memory barriers for req->rq_received
We need to ensure that all writes to the XDR buffers are done before
req->rq_received is visible to other processors.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| e95b85ec9d8c8ad4667f746aa4c9d22c281efc44 |
|
20-Mar-2006 |
Chuck Lever <cel@netapp.com> |
SUNRPC: minor cleanup
RPC_DEBUG_DATA no longer needed in net/sunrpc/xprt.c.
Test plan:
Compile kernel with CONFIG_NFS enabled.
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 11c556b3d8d481829ab5f9933a25d29b00913b5a |
|
20-Mar-2006 |
Chuck Lever <cel@netapp.com> |
SUNRPC: provide a mechanism for collecting stats in the RPC client
Add a simple mechanism for collecting stats in the RPC client. Stats are
tabulated during xprt_release. Note that per_cpu shenanigans are not
required here because the RPC client already serializes on the transport
write lock.
Test plan:
Compile kernel with CONFIG_NFS enabled. Basic performance regression
testing with high-speed networking and high performance server.
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| ef759a2e54ed434b2f72b52a14edecd6d4eadf74 |
|
20-Mar-2006 |
Chuck Lever <cel@netapp.com> |
SUNRPC: introduce per-task RPC iostats
Account for various things that occur while an RPC task is executed.
Separate timers for RPC round trip and RPC execution time show how
long RPC requests wait in queue before being sent. Eventually these
will be accumulated at xprt_release time in one place where they can
be viewed from userland.
Test plan:
Compile kernel with CONFIG_NFS enabled.
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 262ca07de4d7f1bff20361c1353bb14b3607afb2 |
|
20-Mar-2006 |
Chuck Lever <cel@netapp.com> |
SUNRPC: add a handful of per-xprt counters
Monitor generic transport events. Add a transport switch callout to
format transport counters for export to user-land.
Test plan:
Compile kernel with CONFIG_NFS enabled.
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 0065db328533c390fbfb0fe0c46bcf9a278fb99e |
|
03-Jan-2006 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Clean up xprt_destroy()
We ought never to be calling xprt_destroy() if there are still active
rpc_tasks. Optimise away the broken code that attempts to "fix" that case.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 632e3bdc5006334cea894d078660b691685e1075 |
|
03-Jan-2006 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
SUNRPC: Ensure client closes the socket when server initiates a close
If the server decides to close the RPC socket, we currently don't actually
respond until either another RPC call is scheduled, or until xprt_autoclose()
gets called by the socket expiry timer (which may be up to 5 minutes
later).
This patch ensures that xprt_autoclose() is called much sooner if the
server closes the socket.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 02107148349f31eee7c0fb06fd7a880df73dbd20 |
|
03-Jan-2006 |
Chuck Lever <cel@netapp.com> |
SUNRPC: switchable buffer allocation
Add RPC client transport switch support for replacing buffer management
on a per-transport basis.
In the current IPv4 socket transport implementation, RPC buffers are
allocated as needed for each RPC message that is sent. Some transport
implementations may choose to use pre-allocated buffers for encoding,
sending, receiving, and unmarshalling RPC messages, however. For
transports capable of direct data placement, the buffers can be carved
out of a pre-registered area of memory rather than from a slab cache.
Test-plan:
Millions of fsx operations. Performance characterization with "sio" and
"iozone". Use oprofile and other tools to look for significant regression
in CPU utilization.
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| ead5e1c26fdcd969cf40c49cb0589d56879d240d |
|
13-Oct-2005 |
J. Bruce Fields <bfields@fieldses.org> |
SUNRPC: Provide a callback to allow free pages allocated during xdr encoding
For privacy, we need to allocate pages to store the encrypted data (passed
in pages can't be used without the risk of corrupting data in the page cache).
So we need a way to free that memory after the request has been transmitted.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 5e5ce5be6f0161d2a069a4f8a1154fe639c5c02f |
|
18-Oct-2005 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
RPC: allow call_encode() to delay transmission of an RPC call.
Currently, call_encode will cause the entire RPC call to abort if it returns
an error. This is unnecessarily rigid, and gets in the way of attempts
to allow the NFSv4 layer to order RPC calls that carry sequence ids.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 03bf4b707eee06706c9db343dd5c905b7ee47ed2 |
|
26-Aug-2005 |
Chuck Lever <cel@netapp.com> |
[PATCH] RPC: parametrize various transport connect timeouts
Each transport implementation can now set unique bind, connect,
reestablishment, and idle timeout values. These are variables,
allowing the values to be modified dynamically. This permits
exponential backoff of any of these values, for instance.
As an example, we implement exponential backoff for the connection
reestablishment timeout.
Test-plan:
Destructive testing (unplugging the network temporarily). Connectathon
with UDP and TCP.
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 555ee3af161b037865793bd4bebc06b58daafde6 |
|
26-Aug-2005 |
Chuck Lever <cel@netapp.com> |
[PATCH] RPC: clean up after nocong was removed
Clean-up: Move some macros that are specific to the Van Jacobson
implementation into xprt.c. Get rid of the cong_wait field in
rpc_xprt, which is no longer used. Get rid of xprt_clear_backlog.
Test-plan:
Compile with CONFIG_NFS enabled.
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| a58dd398f5db4f73d5c581069fd70a4304cc4f0a |
|
26-Aug-2005 |
Chuck Lever <cel@netapp.com> |
[PATCH] RPC: add a release_rqst callout to the RPC transport switch
The final place where congestion control state is adjusted is in
xprt_release, where each request is finally released. Add a callout
there to allow transports to perform additional processing when a
request is about to be released.
Test-plan:
Use WAN simulation to cause sporadic bursty packet loss. Look for significant
regression in performance or client stability.
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 1570c1e41eabf6b7031f3e4322a2cf1cbe319fee |
|
26-Aug-2005 |
Chuck Lever <cel@netapp.com> |
[PATCH] RPC: add generic interface for adjusting the congestion window
A new interface that allows transports to adjust their congestion window
using the Van Jacobson implementation in xprt.c is provided.
Test-plan:
Use WAN simulation to cause sporadic bursty packet loss. Look for
significant regression in performance or client stability.
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 46c0ee8bc4ad3743de05e8b8b20201df44dcb6d3 |
|
26-Aug-2005 |
Chuck Lever <cel@netapp.com> |
[PATCH] RPC: separate xprt_timer implementations
Allow transports to hook the retransmit timer interrupt. Some transports
calculate their congestion window here so that a retransmit timeout has
immediate effect on the congestion window.
Test-plan:
Use WAN simulation to cause sporadic bursty packet loss. Look for significant
regression in performance or client stability.
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 49e9a89086b3cae784a4868ca852863e4f4ea3fe |
|
26-Aug-2005 |
Chuck Lever <cel@netapp.com> |
[PATCH] RPC: expose API for serializing access to RPC transports
The next method we abstract is the one that releases a transport,
allowing another task to have access to the transport.
Again, one generic version of this is provided for transports that
don't need the RPC client to perform congestion control, and one
version is for transports that can use the original Van Jacobson
implementation in xprt.c.
Test-plan:
Use WAN simulation to cause sporadic bursty packet loss. Look for
significant regression in performance or client stability.
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 12a804698b29d040b7cdd92e8a44b0e75164dae9 |
|
26-Aug-2005 |
Chuck Lever <cel@netapp.com> |
[PATCH] RPC: expose API for serializing access to RPC transports
The next several patches introduce an API that allows transports to
choose whether the RPC client provides congestion control or whether
the transport itself provides it.
The first method we abstract is the one that serializes access to the
RPC transport to prevent the bytes from different requests from mingling
together. This method provides proper request serialization and the
opportunity to prevent new requests from being started because the
transport is congested.
The normal situation is for the transport to handle congestion control
itself. Although NFS over UDP was first, it has been recognized after
years of experience that having the transport provide congestion control
is much better than doing it in the RPC client. Thus TCP, and probably
every future transport implementation, will use the default method,
xprt_lock_write, provided in xprt.c, which does not provide any kind
of congestion control. UDP can continue using the xprt.c-provided
Van Jacobson congestion avoidance implementation.
Test-plan:
Use WAN simulation to cause sporadic bursty packet loss. Look for significant
regression in performance or client stability.
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| fe3aca290f17ae4978bd73d02aa4029f1c9c024c |
|
26-Aug-2005 |
Chuck Lever <cel@netapp.com> |
[PATCH] RPC: add API to set transport-specific timeouts
Prepare the way to remove the "xprt->nocong" variable by adding a callout
to the RPC client transport switch API to handle setting RPC retransmit
timeouts.
Add a pair of generic helper functions that provide the ability to set a
simple fixed timeout, or to set a timeout based on the state of a round-
trip estimator.
Test-plan:
Use WAN simulation to cause sporadic bursty packet loss. Look for significant
regression in performance or client stability.
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 43118c29dea2b23798bd42a147015cceee7fa885 |
|
26-Aug-2005 |
Chuck Lever <cel@netapp.com> |
[PATCH] RPC: get rid of xprt->stream
Now we can fix up the last few places that use the "xprt->stream"
variable, and get rid of it from the rpc_xprt structure.
Test-plan:
Destructive testing (unplugging the network temporarily). Connectathon
with UDP and TCP.
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| c7b2cae8a634015b72941ba2fc6c4bc9b8d3a129 |
|
11-Aug-2005 |
Chuck Lever <cel@citi.umich.edu> |
[PATCH] RPC: separate TCP and UDP write space callbacks
Split the socket write space callback function into a TCP version and UDP
version, eliminating one dependence on the "xprt->stream" variable.
Keep the common pieces of this path in xprt.c so other transports can use
it too.
Test-plan:
Write-intensive workload on a single mount point.
Version: Thu, 11 Aug 2005 16:07:51 -0400
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 55aa4f58aa43dc9a51fb80010630d94b96053a2e |
|
11-Aug-2005 |
Chuck Lever <cel@citi.umich.edu> |
[PATCH] RPC: client-side transport switch cleanup
Clean-up: change some comments to reflect the realities of the new RPC
transport switch mechanism. Get rid of unused xprt_receive() prototype.
Also, organize function prototypes in xprt.h by usage and scope.
Test-plan:
Compile kernel with CONFIG_NFS enabled.
Version: Thu, 11 Aug 2005 16:07:21 -0400
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 44fbac2288dfed6f1963ac00bf922c3bcd779cd1 |
|
11-Aug-2005 |
Chuck Lever <cel@citi.umich.edu> |
[PATCH] RPC: Add helper for waking tasks pending on a transport
Clean-up: remove only reference to xprt->pending from the socket transport
implementation. This makes a cleaner interface for other transport
implementations as well.
Test-plan:
Compile kernel with CONFIG_NFS enabled.
Version: Thu, 11 Aug 2005 16:06:52 -0400
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 2226feb6bcd0e5e117a9be3ea3dd3ffc14f3e41e |
|
11-Aug-2005 |
Chuck Lever <cel@citi.umich.edu> |
[PATCH] RPC: rename the sockstate field
Clean-up: get rid of a name reference to sockets in the generic parts of the
RPC client by renaming the sockstate field in the rpc_xprt structure.
Test-plan:
Compile kernel with CONFIG_NFS enabled.
Version: Thu, 11 Aug 2005 16:05:53 -0400
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 5dc07727f86b25851e95193a0c484ea21b531c47 |
|
11-Aug-2005 |
Chuck Lever <cel@citi.umich.edu> |
[PATCH] RPC: Rename xprt_lock
Clean-up: Replace the xprt_lock with something more aptly named. This lock
single-threads the XID and request slot reservation process.
Test-plan:
Compile kernel with CONFIG_NFS enabled.
Version: Thu, 11 Aug 2005 16:05:26 -0400
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 4a0f8c04f2ece949d54a0c4fd7490259cf23a58a |
|
11-Aug-2005 |
Chuck Lever <cel@citi.umich.edu> |
[PATCH] RPC: Rename sock_lock
Clean-up: replace a name reference to sockets in the generic parts of the RPC
client by renaming sock_lock in the rpc_xprt structure.
Test-plan:
Compile kernel with CONFIG_NFS enabled.
Version: Thu, 11 Aug 2005 16:05:00 -0400
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 9903cd1c27a1f30e8efea75e125be3b2002f7cb9 |
|
11-Aug-2005 |
Chuck Lever <cel@citi.umich.edu> |
[PATCH] RPC: transport switch function naming
Introduce block header comments and a function naming convention to the
socket transport implementation. Provide a debug setting for transports
that is separate from RPCDBG_XPRT. Eliminate xprt_default_timeout().
Provide block comments for exposed interfaces in xprt.c, and eliminate
the useless obvious comments.
Convert printk's to dprintk's.
Test-plan:
Compile kernel with CONFIG_NFS enabled.
Version: Thu, 11 Aug 2005 16:04:04 -0400
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| a246b0105bbd9a70a698f69baae2042996f2a0e9 |
|
11-Aug-2005 |
Chuck Lever <cel@citi.umich.edu> |
[PATCH] RPC: introduce client-side transport switch
Move the bulk of client-side socket-specific code into a separate source
file, net/sunrpc/xprtsock.c.
Test-plan:
Millions of fsx operations. Performance characterization such as "sio" or
"iozone". Destructive testing (unplugging the network temporarily, server
reboots). Connectathon with v2, v3, and v4.
Version: Thu, 11 Aug 2005 16:03:38 -0400
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 094bb20b9fcab3a1652a77741caba6b78097d622 |
|
11-Aug-2005 |
Chuck Lever <cel@citi.umich.edu> |
[PATCH] RPC: extract socket logic common to both client and server
Clean-up: Move some code that is common to both RPC client- and server-side
socket transports into its own source file, net/sunrpc/socklib.c.
Test-plan:
Compile kernel with CONFIG_NFS enabled. Millions of fsx operations over
UDP, client and server. Connectathon over UDP.
Version: Thu, 11 Aug 2005 16:03:09 -0400
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| eab5c084b858fd95a873fc2b97de9a9ad937b4ed |
|
11-Aug-2005 |
Chuck Lever <cel@citi.umich.edu> |
[PATCH] NFS: use a constant value for TCP retransmit timeouts
Implement a best practice: don't use exponential backoff when computing
retransmit timeout values on TCP connections, but simply retransmit
at regular intervals.
This also fixes a bug introduced when xprt_reset_majortimeo() was added.
Test-plan:
Enable RPC debugging and watch timeout behavior on a NFS/TCP mount.
Version: Thu, 11 Aug 2005 16:02:19 -0400
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 23475d66bd8600e0c5353f86c1b74f68df27bdb5 |
|
11-Aug-2005 |
Chuck Lever <cel@citi.umich.edu> |
[PATCH] RPC: Report connection errors properly when mounting with "soft"
Fix up xprt_connect_status: the soft timeout logic was clobbering tk_status,
so TCP connect errors were not properly reported on soft mounts.
Test-plan:
Destructive testing (unplugging the network temporarily). Connectathon
with UDP and TCP.
Version: Thu, 11 Aug 2005 16:01:28 -0400
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 7e8d7e3c9e38dab8d28a8667faa4941842f64213 |
|
08-Jul-2005 |
KAMBAROV, ZAUR <kambarov@berkeley.edu> |
[PATCH] coverity: sunrpc/xprt task null check
In __xprt_lock_write() we check to see if `task' is NULL, but in other places
we just go and dereference it.
`task' shouldn't be NULL anyway, so remove this test.
This defect was found automatically by Coverity Prevent, a static analysis
tool.
Signed-off-by: Zaur Kambarov <zkambarov@coverity.com>
Acked-by: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
|
| c54d7e03c3a21b38c587f671704c5a12aa3987fc |
|
25-Jun-2005 |
David S. Miller <davem@davemloft.net> |
[SUNRPC]: Fix {s,}size_t printf format strings in xprt.c
Signed-off-by: David S. Miller <davem@davemloft.net>
|
| ae3884621bf5b4caff7785b9a417f262202965b2 |
|
22-Jun-2005 |
Chuck Lever <cel@netapp.com> |
[PATCH] RPC: kick off socket connect operations faster
Make the socket transport kick the event queue to start socket connects
immediately. This should improve responsiveness of applications that are
sensitive to slow mount operations (like automounters).
We are now also careful to cancel the connect worker before destroying
the xprt. This eliminates a race where xprt_destroy can finish before
the connect worker is even allowed to run.
Test-plan:
Destructive testing (unplugging the network temporarily). Connectathon
with UDP and TCP. Hard-code impossibly small connect timeout.
Version: Fri, 29 Apr 2005 15:32:01 -0400
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 20e5ac828dfd23b9080159c62a34f32d2dcd92fc |
|
22-Jun-2005 |
Chuck Lever <cel@netapp.com> |
[PATCH] RPC: TCP reconnects are too slow
When the network layer reports a connection close, the RPC task
waiting to reconnect should be notified so it can retry immediately
instead of waiting for the normal connection establishment timeout.
This reverts a change made in 2.6.6 as part of adding client support
for RPC over TCP socket idle timeouts.
Test-plan:
Destructive testing with NFS over TCP mounts.
Version: Fri, 29 Apr 2005 15:31:46 -0400
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 0f9dc2b16884bb5957d010ed8e9114e771a05916 |
|
22-Jun-2005 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
[PATCH] RPC: Clean up socket autodisconnect
Cancel autodisconnect requests inside xprt_transmit() in order to avoid
races.
Use more efficient del_singleshot_timer_sync()
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 7e06b53d796a3740307b54aa2799077f8a0c84e7 |
|
22-Jun-2005 |
Trond Myklebust <Trond.Myklebust@netapp.com> |
[PATCH] RPC: fix accounting bug in the case of a truncated RPC message
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| e053d1ab62c8ef0eff3dd4c95448cad3c6d2fbf4 |
|
22-Jun-2005 |
Olaf Kirch <okir@suse.de> |
[PATCH] RPC: Lazy RPC receive buffer allocation
Signed-off-by: Olaf Kirch <okir@suse.de>
Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
|
| 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 |
|
17-Apr-2005 |
Linus Torvalds <torvalds@ppc970.osdl.org> |
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!
|