Commit Graph

287147 Commits

Author SHA1 Message Date
Stanislav Kinsbursky
f2ac4dc911 SUNRPC: parametrize rpc_uaddr2sockaddr() by network context
Parametrize rpc_uaddr2sockaddr() by network context and thus force it's callers to pass
in network context instead of using hard-coded "init_net".

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 19:28:12 -05:00
Stanislav Kinsbursky
90100b1766 SUNRPC: parametrize rpc_pton() by network context
Parametrize rpc_pton() by network context and thus force it's callers to pass
in network context instead of using hard-coded "init_net".

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 19:28:12 -05:00
Stanislav Kinsbursky
8b147f7473 SUNRPC: parametrize rpc_pton6() by network context
Parametrize rpc_pton6() by network context and thus force it's caller
to pass in network context instead of using hard-coded "init_net".

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 19:28:11 -05:00
Stanislav Kinsbursky
3065f1e29a SUNRPC: parametrize rpc_parse_scope_id() by network context
Parametrize rpc_parse_scope_id() by network context and thus force it's caller
to pass in network context instead of using hard-coded "init_net".

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 19:28:11 -05:00
Stanislav Kinsbursky
f7a30c18e8 SUNRPC: parametrize local rpcbind clients creation with net ns
These client are per network namespace and thus can be created for different
network namespaces.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 19:28:11 -05:00
Stanislav Kinsbursky
977ac31573 SUNRPC: register rpcbind programs in passed network namespase context
Registering rpcbind program requires rpcbind clients, which are per network
namespace context.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 19:28:10 -05:00
Stanislav Kinsbursky
c2550e07a6 SUNRPC: create rpcbind client in passed network namespace context
Rpcbind clients are per network namespace.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 19:28:10 -05:00
Stanislav Kinsbursky
1a114a6646 SUNRPC: optimize net_ns dereferencing in rpcbind registering calls
Static rpcbind registering functions can be parametrized by network namespace
pointer, calculated only once, instead of using init_net pointer (or taking it
from current when virtualization will be comleted) in many places.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 19:28:09 -05:00
Stanislav Kinsbursky
2ea75a10ad SUNRPC: optimize net_ns dereferencing in rpcbind creation calls
Static rpcbind creation functions can be parametrized by network namespace
pointer, calculated only once, instead of using init_net pointer (or taking it
from current when virtualization will be comleted) in many places.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 19:28:09 -05:00
Stanislav Kinsbursky
dff02d499c SUNRPC: move rpcbind internals to sunrpc part of network namespace context
This patch makes rpcbind logic works in network namespace context. IOW each
network namespace will have it's own unique rpcbind internals (clients and
friends) required for registering svc services per network namespace.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 19:28:09 -05:00
Trond Myklebust
961a828df6 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>
2012-01-31 19:28:08 -05:00
Trond Myklebust
2aeb98f498 NFS: Ensure that mmapped pages remain stable during writeback
Ensure that nfs_vm_page_mkwrite() waits for the page writeback to
complete before the application is allowed to modify page
contents.
The main reason for wanting to do this in NFS is to ensure that the
server doesn't get confused if we have to resend the RPC request
due to a dropped/missed reply.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 19:28:08 -05:00
Trond Myklebust
536e43d12b NFS: Optimise away unnecessary setattrs for open(O_TRUNC);
Currently, we will correctly optimise away a truncate that doesn't
change the file size. However, in the case of open(O_TRUNC), we
also want to optimise away the time changes.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 19:28:07 -05:00
Trond Myklebust
48c22eb210 NFS: Move struct nfs_unique_id into struct nfs_seqid_counter
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 19:28:07 -05:00
Trond Myklebust
7ba127ab9f NFSv4: Move contents of struct rpc_sequence into struct nfs_seqid_counter
Clean up.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 19:28:06 -05:00
Trond Myklebust
9d12b216aa NFSv41: Add a new helper nfs4_init_sequence()
Clean up

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 19:28:06 -05:00
Trond Myklebust
d2d7ce28a2 NFSv4: Replace lock_owner->ld_id with an ida based allocator
Again, We're unlikely to ever need more than 2^31 simultaneous lock
owners, so let's replace the custom allocator.

Now that there are no more users, we can also get rid of the custom
allocator code.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:28 -05:00
Trond Myklebust
9157c31dd6 NFSv4: Replace state_owner->so_owner_id with an ida based allocator
We're unlikely to ever need more than 2^31 simultaneous open owners,
so let's replace the custom allocator with the generic ida allocator.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:28 -05:00
Trond Myklebust
d1e284d50a NFSv4: Clean up nfs4_get_state_owner
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:28 -05:00
Trond Myklebust
1313e6034a NFS: Remove unnecessary includes from linux/nfs_fs_i.h
Also from linux/nfs_xdr.h.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:28 -05:00
Stanislav Kinsbursky
12bc372b96 SUNRPC: kernel PipeFS mount point creation routines removed
This patch removes static rpc_mnt variable and its creation and destruction
routines, because they are not used anymore.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:27 -05:00
Stanislav Kinsbursky
2561d618ff NFS: remove RPC PipeFS mount point reference from blocklayout routines
This is a cleanup patch. We don't need this reference anymore, because
blocklayout pipes dentries now creates and destroys in per-net operations and
on PipeFS mount/umount notification.
Note that nfs4blocklayout_register_net() now returns 0 instead of -ENOENT in
case of PipeFS superblock absence. This is ok, because blocklayout pipe dentry
will be created on PipeFS mount event.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:27 -05:00
Stanislav Kinsbursky
627f30668f NFS: blocklayout PipeFS notifier introduced
This patch subscribes blocklayout pipes to RPC pipefs notifications. Notifier
is registering on blocklayout module load. This notifier callback is
responsible for creation/destruction of PipeFS blocklayout pipe dentry.
Note that no locking required in notifier callback because PipeFS superblock
pointer is passed as an argument from it's creation or destruction routine and
thus we can be sure about it's validity.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:27 -05:00
Stanislav Kinsbursky
9e2e74dba6 NFS: blocklayout pipe creation per network namespace context introduced
This patch implements blocklayout pipe creation and registration per each
existent network namespace.
This was achived by registering NFS per-net operations, responsible for
blocklayout pipe allocation/register and unregister/destruction instead of
initialization and destruction of static "bl_device_pipe" pipe (this one was
removed).
Note, than pointer to network blocklayout pipe is stored in per-net "nfs_net"
structure, because allocating of one more per-net structure for blocklayout
module looks redundant.
This patch also changes dev_remove() function prototype (and all it's callers,
where it' requied) by adding network namespace pointer parameter, which is used
to discover proper blocklayout pipe for rpc_queue_upcall() call.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:27 -05:00
Stanislav Kinsbursky
332dfab6f4 NFS: handle blocklayout pipe PipeFS dentry by network namespace aware routines
This patch makes blocklayout pipe dentry allocated and destroyed in network
namespace context by PipeFS network namespace aware routines.
Network namespace context is obtained from nfs_client structure.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:27 -05:00
Stanislav Kinsbursky
eee17325f1 NFS: idmap PipeFS notifier introduced
v2:
1) Added "nfs_idmap_init" and "nfs_idmap_quit" definitions for kernels built
without CONFIG_NFS_V4 option set.

This patch subscribes NFS clients to RPC pipefs notifications. Idmap notifier
is registering on NFS module load. This notifier callback is responsible for
creation/destruction of PipeFS idmap pipe dentry for NFS4 clients.

Since ipdmap pipe is created in rpc client pipefs directory, we have make sure,
that this directory has been created already. IOW RPC client notifier callback
has been called already. To achive this, PipeFS notifier priorities has been
introduced (RPC clients notifier priority is greater than NFS idmap one).
But this approach gives another problem: unlink for RPC client directory will
be called before NFS idmap pipe unlink on UMOUNT event and will fail, because
directory is not empty.
The solution, introduced in this patch, is to try to remove client directory
once again after idmap pipe was unlinked. This looks like ugly hack, so
probably it should be replaced in some more elegant way.

Note that no locking required in notifier callback because PipeFS superblock
pointer is passed as an argument from it's creation or destruction routine and
thus we can be sure about it's validity.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:27 -05:00
Stanislav Kinsbursky
4929d1d33f NFS: handle NFS idmap pipe PipeFS dentries by network namespace aware routines
This patch makes NFS idmap pipes dentries allocated and destroyed in network
namespace context by PipeFS network namespace aware routines.
Network namespace context is obtained from nfs_client structure.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:27 -05:00
Stanislav Kinsbursky
7bb782c6ac NFS: create callback transports in parent transport network namespace
This patch replaces static "init_net" references with parent transport xprt_net
reference. Thus callback transports will be created in the same network
namespace as respective NFS mount point was created.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:27 -05:00
Stanislav Kinsbursky
6d59b8d599 NFS: pass NFS client owner network namespace to RPC client creation routine
This patch replaces static "init_net" with nfs_client->net pointer in RPC
client creation calls.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:27 -05:00
Stanislav Kinsbursky
e50a7a1a42 NFS: make NFS client allocated per network namespace context
This patch adds new net variable to nfs_client structure. This variable is set
on NFS client creation and cheched during matching NFS client search.
Initially current->nsproxy->net_ns is used as network namespace owner for new
NFS client to create. This network namespace pointer is set during mount
options parsing and thus can be passed from user-spave utils in future if will
be necessary.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:26 -05:00
Stanislav Kinsbursky
ad6b134008 SUNRPC: fix pipe->ops cleanup on pipe dentry unlink
This patch looks late due to GSS AUTH patches sent already. But it fixes a flaw
in RPC PipeFS pipes handling.
I've added this patch in the series, because this series related to pipes. But
it should be a part of previous series named "SUNPRC: cleanup PipeFS for
network-namespace-aware users".

Pipe dentry can be created and destroyed many times during pipe life cycle.
This actually means, that we can't set pipe->ops to NULL in rpc_close_pipes()
and use this variable as a flag, indicating, that pipe's dentry is unlinking.
To follow this restriction, this patch replaces "pipe->ops = NULL" assignment
and checks for NULL with "pipe->dentry = NULL" assignment and checks for
NULL respectively.
This patch also removes check for non-NULL pipe->ops (or pipe->dentry) in
rpc_close_pipes() because it always non-NULL now.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:26 -05:00
Stanislav Kinsbursky
39cb67b9a0 NFS: remove RPC PipeFS mount point references from NFS cache routines
This is a cleanup patch. We don't need this reference anymore, because DNS
resolver cache now creates it's dentries in per-net operations and on PipeFS
mount/umount notification.
Note that nfs_cache_register_net() now returns 0 instead of -ENOENT in case of
PiepFS superblock absence. This is ok, Dns resolver cache will be regestered on
PipeFS mount event.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:26 -05:00
Stanislav Kinsbursky
9df69c81b4 NFS: DNS resolver PipeFS notifier introduced
This patch subscribes DNS resolver caches to RPC pipefs notifications. Notifier
is registering on NFS module load. This notifier callback is responsible for
creation/destruction of PipeFS DNS resolver cache directory.
Note that no locking required in notifier callback because PipeFS superblock
pointer is passed as an argument from it's creation or destruction routine and
thus we can be sure about it's validity.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:26 -05:00
Stanislav Kinsbursky
1b340d0118 NFS: DNS resolver cache per network namespace context introduced
This patch implements DNS resolver cache creation and registration for each
alive network namespace context.
This was done by registering NFS per-net operations, responsible for DNS cache
allocation/register and unregister/destructioning instead of initialization and
destruction of static "nfs_dns_resolve" cache detail (this one was removed).
Pointer to network dns resolver cache is stored in new per-net "nfs_net"
structure.
This patch also changes nfs_dns_resolve_name() function prototype (and it's
calls) by adding network pointer parameter, which is used to get proper DNS
resolver cache pointer for do_cache_lookup_wait() call.

Note: empty nfs_dns_resolver_init() and nfs_dns_resolver_destroy() functions
will be used in next patch in the series.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:26 -05:00
Stanislav Kinsbursky
5c1cacb175 NFS: handle NFS caches dentries by network namespace aware routines
This patch makes NFS caches PipeFS dentries allocated and destroyed in network
namespace context by PipeFS network namespace aware routines.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:26 -05:00
Stanislav Kinsbursky
9222b95506 NFS: split cache creation and PipeFS registration
This precursor patch splits NFS cache creation and PipeFS registartion.
It's required for latter split of NFS DNS resolver cache creation per network
namespace context and PipeFS registration/unregistration on MOUNT/UMOUNT
events.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:26 -05:00
Stanislav Kinsbursky
820f9442e7 SUNRPC: split cache creation and PipeFS registration
This precursor patch splits SUNRPC cache creation and PipeFS registartion.
It's required for latter split of NFS DNS resolver cache creation per network
namespace context and PipeFS registration/unregistration on MOUNT/UMOUNT
events.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:26 -05:00
Stanislav Kinsbursky
30507f58ce SUNRPC: remove RPC PipeFS mount point reference from RPC client
This is a cleanup patch. We don't need this reference anymore.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:26 -05:00
Stanislav Kinsbursky
70fe25b6e1 SUNRPC: remove RPC pipefs mount point manipulations from RPC clients code
v2:
1) Updated due to changes in the first patch of the series.

Now, with RPC pipefs mount notifications handling in RPC clients, we can remove
mount point creation and destruction. RPC clients dentries will be created on
PipeFS mount event and removed on umount event.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:25 -05:00
Stanislav Kinsbursky
f5131257f7 SUNRPC: remove RPC client pipefs dentries after unregister
Without this patch we have races:

rpc_fill_super				rpc_free_client
rpc_pipefs_event(MOUNT)			rpc_remove_pipedir
spin_lock(&rpc_client_lock);
rpc_setup_pipedir_sb
spin_unlock(&rpc_client_lock);
					spin_lock(&rpc_client_lock);
					(remove from list)
					spin_unlock(&rpc_client_lock);
					MEAMORY LEAKED

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:25 -05:00
Stanislav Kinsbursky
80df9d2022 SUNRPC: subscribe RPC clients to pipefs notifications
This patch subscribes RPC clients to RPC pipefs notifications. RPC clients
notifier block is registering with pipefs initialization during SUNRPC module
init.
This notifier callback is responsible for RPC client PipeFS directory and GSS
pipes creation. For pipes creation and destruction two additional callbacks
were added to struct rpc_authops.
Note that no locking required in notifier callback because PipeFS superblock
pointer is passed as an argument from it's creation or destruction routine and
thus we can be sure about it's validity.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:25 -05:00
Stanislav Kinsbursky
70abc49b4f SUNRPC: make SUNPRC clients list per network namespace context
This patch moves static SUNRPC clients list and it's lock to sunrpc_net
structure.
Currently this list is used only for debug purposes. But later it will be used
also for selecting clients by networks namespace on PipeFS mount/umount events.
Per-network namespace lists will make this faster and simplier.

Note: client list is taken from "init_net" network namespace context in
rpc_show_tasks(). This will be changed some day later with making SUNRPC
sysctl's per network namespace context.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:25 -05:00
Stanislav Kinsbursky
ccdc28f81c SUNRPC: handle GSS AUTH pipes by network namespace aware routines
This patch makes RPC GSS PipeFs pipes allocated in it's RPC client owner
network namespace context.
Pipes creation and destruction now done in separated functions, which takes
care about PipeFS superblock locking.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:25 -05:00
Stanislav Kinsbursky
0157d021d2 SUNRPC: handle RPC client pipefs dentries by network namespace aware routines
v2:
1) "Over-put" of PipeFS mount point fixed. Fix is ugly, but allows to bisect
the patch set. And it will be removed later in the series.

This patch makes RPC clients PipeFs dentries allocations in it's owner network
namespace context.
RPC client pipefs dentries creation logic has been changed:
1) Pipefs dentries creation by sb was moved to separated function, which will
be used for handling PipeFS mount notification.
2) Initial value of RPC client PipeFS dir dentry is set no NULL now.

RPC client pipefs dentries cleanup logic has been changed:
1) Cleanup is done now in separated rpc_remove_pipedir() function, which takes
care about pipefs superblock locking.

Also this patch removes slashes from cb_program.pipe_dir_name and from
NFS_PIPE_DIRNAME to make rpc_d_lookup_sb() work. This doesn't affect
vfs_path_lookup() results in nfs4blocklayout_init() since this slash is cutted
off anyway in link_path_walk().

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:25 -05:00
Stanislav Kinsbursky
c239d83b99 SUNRPC: split SUNPRC PipeFS dentry and private pipe data creation
This patch is a final step towards to removing PipeFS inode references from
kernel code other than PipeFS itself. It makes all kernel SUNRPC PipeFS users
depends on pipe private data, which state depend on their specific operations,
etc.
This patch completes SUNRPC PipeFS preparations and allows to create pipe
private data and PipeFS dentries independently.
Next step will be making SUNPRC PipeFS dentries allocated by SUNRPC PipeFS
network namespace aware routines.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:25 -05:00
Stanislav Kinsbursky
9beae4677d SUNRPC: cleanup GSS pipes usage
Currently gss auth holds RPC inode pointer which is now redundant since it
requires only pipes operations which takes private pipe data as an argument.
Thus this code can be cleaned and all references to RPC inode can be replaced
with privtae pipe data references.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:25 -05:00
Stanislav Kinsbursky
d706ed1f50 SUNPRC: cleanup RPC PipeFS pipes upcall interface
RPC pipe upcall doesn't requires only private pipe data. Thus RPC inode
references in this code can be removed.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:25 -05:00
Stanislav Kinsbursky
d0fe13ba91 SUNRPC: cleanup PipeFS redundant RPC inode usage
This patch removes redundant RPC inode references from PipeFS. These places are
actually where pipes operations are performed.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:24 -05:00
Stanislav Kinsbursky
ba9e097593 SUNRPC: split SUNPRC PipeFS pipe data and inode creation
Generally, pipe data is used only for pipes, and thus allocating space for it
on every RPC inode allocation is redundant. This patch splits private SUNRPC
PipeFS pipe data and inode, makes pipe data allocated only for pipe inodes.
This patch is also is a next step towards to to removing PipeFS inode
references from kernel code other than PipeFS itself.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:24 -05:00
Stanislav Kinsbursky
766347bec3 SUNRPC: replace inode lock with pipe lock for RPC PipeFS operations
Currenly, inode i_lock is used to provide concurrent access to SUNPRC PipeFS
pipes. It looks redundant, since now other use of inode is present in most of
these places and thus can be easely replaced, which will allow to remove most
of inode references from PipeFS code. This is a first step towards to removing
PipeFS inode references from kernel code other than PipeFS itself.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31 18:20:24 -05:00