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>
To prepare for including non-sockets-based RPC transports, move the
sockets-dependent definitions into their own file.
Signed-off-by: Tom Talpey <tmt@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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>
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>
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>
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>
Adds a flag word to the xdrbuf struct which indicates any bulk
disposition of the data. This enables RPC transport providers to
marshal it efficiently/appropriately, and may enable other
optimizations.
Signed-off-by: Tom Talpey <tmt@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
The rpcbind (v3+) netid is provided by each RPC client transport. This fixes
an omission in IPv6 rpcbind client support, and enables future extension.
Signed-off-by: Tom Talpey <tmt@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Move the TCP/UDP rpcbind netid's from the rpcbind client to a global header.
Signed-off-by: Tom Talpey <tmt@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
The purpose of an RPC ping (a NULL request) is to determine whether the
remote end is operating and supports the RPC program and version of the
request.
If we do an RPC bind and the remote's rpcbind service says "this
program or service isn't supported" then we have our answer already,
and we should give up immediately.
This is good for the kernel mount client, as it will cause the request
to fail, and then allow an immediate retry with different options.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Add more new error code processing to the kernel's rpcbind client
and to call_bind_status() to distinguish two cases:
Case 1: the remote has replied that the program/version tuple is not
registered (returns EACCES)
Case 2: retry with a lesser rpcbind version (rpcb now returns EPFNOSUPPORT)
This change allows more specific error processing for each of these two
cases. We now fail case 2 instead of retrying... it's a server
configuration error not to support even rpcbind version 2. And don't
expose this new error code to user land -- convert it to EIO before
failing the RPC.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Add new error code processing to the kernel's rpcbind client and to
call_bind_status() to distinguish two cases:
Case 1: the remote has replied that the program/version tuple is not
registered (returns -EACCES)
Case 2: another process is already in the middle of binding on this
transport (now returns -EAGAIN)
This change allows more specific retry processing for each of these two
cases.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
When a server returns a bad rpcbind reply, make rpcbind client recovery logic
retry with an older protocol version. Older versions are more likely to work
correctly.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Add better sanity checking of server replies to the GETVERSADDR reply
decoder. Change the error return code: EIO is what other XDR decoding
routines return if there is a failure while decoding.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
/home/cel/linux/net/sunrpc/clnt.c: In function ‘rpc_show_tasks’:
/home/cel/linux/net/sunrpc/clnt.c:1538: warning:
signed and unsigned type in conditional expression
This points out another case where a conditional expression returns a
signed value in one arm and an unsigned value in the other.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Check the length of the passed-in server name before trying to print it in
the log.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Noticed by Tom Talpey <tmt@netapp.com>:
OBTW, there's a nit on that memcpy, too. The r_addr is an array, so
memcpy(&map->r_addr
is passing the address of the array as a char **. It's the same as
map->r_addr, but technically the wrong type.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
/home/cel/linux/net/sunrpc/clnt.c: In function ‘rpc_bind_new_program’:
/home/cel/linux/net/sunrpc/clnt.c:445: warning:
comparison between signed and unsigned
RPC version numbers are u32, not int.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Remove one of two identical dprintk's that occur when an RPC client is
created.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Fix some problems with rpcbind v3 and v4 queries from the in-kernel rpcbind
client:
1. The r_addr argument must be a full universal address, not just an IP
address, and
2. The universal address in r_addr is the address of the remote rpcbind
server, not the RPC service being requested
This addresses bugzilla.kernel.org report 8891 for 2.6.23-rc and greater.
In addition, if the rpcbind client is unable to start the rpcbind request,
make sure not to leak the xprt.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
"Universal addresses" are a string representation of an IP address and
port. They are described fully in RFC 3530, section 2.2. Add support
for generating them in the RPC client's socket transport module.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Finalize support for setting up RPC client transports to remote RPC
services addressed via IPv6.
Based on work done by Gilles Quillard at Bull Open Source.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: Aurelien Charbon <aurelien.charbon@ext.bull.net>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Prepare for introduction of IPv6 versions of same.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Finishing a socket connect is the same for IPv4 and IPv6, so split it out
into a helper.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: Aurelien Charbon <aurelien.charbon@ext.bull.net>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Clone xs_bindresvport into two functions, one that can handle IPv4
addresses, and one that can handle IPv6 addresses.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: Aurelien Charbon <aurelien.charbon@ext.bull.net>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
We could clone xs_set_port, but this is easier overall.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: Aurelien Charbon <aurelien.charbon@ext.bull.net>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Prepare for adding IPv6 support to the RPC client by adding IPv6
capabilities to rpcbind. Note that this is support on the query side
only; registering IPv6 addresses with the local portmapper will come
later.
Note we have to take care not to fall back to using version 2 of the
rpcbind protocol if we're dealing with IPv6 address. Version 2 doesn't
support IPv6 at all.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: Aurelien Charbon <aurelien.charbon@ext.bull.net>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Prepare to add an IPv6 version of xs_format_peer_addresses by renaming it
to xs_format_ipv4_peer_addresses.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: Aurelien Charbon <aurelien.charbon@ext.bull.net>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Add support for the NFS client's need to export volume information
with IP addresses formatted in hex instead of decimal.
This isn't used yet, but subsequent patches (not in this series) will
change the NFS client to use this functionality.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Use more generic logic to free buffers holding formatted addresses. This
makes it less likely a bug will be introduced when adding additional buffer
types in xs_format_peer_address().
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
include/linux/kernel.h gives us some nice macros for formatting IP
addresses. Use them.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This will allow rpc.gssd to use inotify instead of dnotify in order to
locate new rpc upcall pipes.
This also requires the exporting of __audit_inode_child(), which is used by
fsnotify_create() and fsnotify_mkdir(). Ccing David Woodhouse.
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
we upgraded the kernel of a nfs-server from 2.6.17.11 to 2.6.22.6. Since
then we get the message
lockd: too many open TCP sockets, consider increasing the number of nfsd threads
lockd: last TCP connect from ^\\236^\É^D
These random characters in the second line are caused by a bug in
svc_tcp_accept.
(Note: there are two previous __svc_print_addr(sin, buf, sizeof(buf))
calls in this function, either of which would initialize buf correctly;
but both are inside "if"'s and are not necessarily executed. This is
less obvious in the second case, which is inside a dprintk(), which is a
macro which expands to an if statement.)
Signed-off-by: Wolfgang Walter <wolfgang.walter@studentenwerk.mhn.de>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Commit aaf68cfbf2 added a bias
to sk_inuse, so this test for an unused socket now fails. So no
sockets get closed because they are old (they might get closed
if the client closed them).
This bug has existed since 2.6.21-rc1.
Thanks to Wolfgang Walter for finding and reporting the bug.
Cc: Wolfgang Walter <wolfgang.walter@studentenwerk.mhn.de>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This patch cleans up duplicate includes in
net/sunrpc/
Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
The commit 4ada539ed7 lead to the unpleasant
possibility of an asynchronous rpc_task being required to call
rpciod_down() when it is complete. This again means that the rpciod
workqueue may get to call destroy_workqueue on itself -> hang...
Change rpciod_up/rpciod_down to just get/put the module, and then
create/destroy the workqueues on module load/unload.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
The handling of the re-registration case is wrong here; the "test" that was
returned from auth_domain_lookup will not be used again, so that reference
should be put. And auth_domain_lookup never did anything with "new" in
this case, so we should just clean it up ourself.
Thanks to Akinobu Mita for bug report, analysis, and testing.
Cc: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu>
Cc: Neil Brown <neilb@suse.de>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Slab destructors were no longer supported after Christoph's
c59def9f22 change. They've been
BUGs for both slab and slub, and slob never supported them
either.
This rips out support for the dtor pointer from kmem_cache_create()
completely and fixes up every single callsite in the kernel (there were
about 224, not including the slab allocator definitions themselves,
or the documentation references).
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Since every invocation of xdr encode or decode functions takes the BKL now,
there's a lot of redundant lock_kernel/unlock_kernel pairs that we can pull
out into a common function.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
![](/assets/img/avatar_default.png "\\"Talpey, Thomas\"){kind=avatar}