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2012-01-31SUNRPC: register RPC stats /proc entries in passed network namespace contextStanislav Kinsbursky
This patch makes it possible to create NFS program entry ("/proc/net/rpc/nfs") in passed network namespace context instead of hard-coded "init_net". Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31NFS: decode destination address in proper network namespace contextStanislav Kinsbursky
This patch replaces "init_net" with NFS client's owner net in rpc_pton() call in decode_ds_addr(). Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31NFS: parse DNS cache in proper network namespace contextStanislav Kinsbursky
This patch replaces "init_net" with cache's owner net in rpc_pton() call. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31SUNRPC: generic cache register routines removedStanislav Kinsbursky
All cache users now uses network-namespace-aware routines, so generic ones are obsolete. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Acked-by: J. Bruce Fields <bfields@redhat.com>
2012-01-31SUNRPC: ip map cache per network namespace cleanupStanislav Kinsbursky
This patch converts ip_map_cache per network namespace implemenetation to the same view, as other caches done in the series. Besides generalization, code becomes shorter with this patch. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Acked-by: J. Bruce Fields <bfields@redhat.com>
2012-01-31SUNRPC: create GSS auth cache per network namespaceStanislav Kinsbursky
This patch makes GSS auth cache details allocated and registered per network namespace context. Thus with this patch rsi_cache and rsc_cache contents for network namespace "X" are controlled from proc file system mount for the same network namespace "X". Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Acked-by: J. Bruce Fields <bfields@redhat.com>
2012-01-31SUNRPC: create unix gid cache per network namespaceStanislav Kinsbursky
v2: 1) fixed silly usage of template cache as a real one (this code left from static global cache for all) This patch makes unix_gid_cache cache detail allocated and registered per network namespace context. Thus with this patch unix_gid_cache contents for network namespace "X" are controlled from proc file system mount for the same network namespace "X". Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Acked-by: J. Bruce Fields <bfields@redhat.com>
2012-01-31SUNRPC: cache creation and destruction routines introducedStanislav Kinsbursky
This patch prepares infrastructure for network namespace aware cache detail allocation. One note about adding network namespace link to cache structure. It's going to be used later in NFS DNS cache parsing routine (nfs_dns_parse for rpc_pton() call). Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Acked-by: J. Bruce Fields <bfields@redhat.com>
2012-01-31SUNRPC: unregister service on creation in current network namespaceStanislav Kinsbursky
On service shutdown we can be sure, that no more users of it left except current. Thus it looks like using current network namespace context is safe in this case. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31SUNRPC: register service on creation in current network namespaceStanislav Kinsbursky
Service, using rpcbind (Lockd, NFSd) are starting from userspace call and thus we can use current network namespace. There could be a problem with NFSd service, because it's creation can be called through NFSd fs from different network namespace. But this is a part of "NFSd per net ns" task and will be fixed in future. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31SUNRPC: pass network namespace to service registering routinesStanislav Kinsbursky
Lockd and NFSd services will handle requests from and to many network nsamespaces. And thus have to be registered and unregistered per network namespace. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31SUNRPC: use proper network namespace in rpcbind RPCBPROC_GETADDR procedureStanislav Kinsbursky
Pass request socket network namespace to rpc_uaddr2sockaddr() instead of hardcoded "init_net", when decoding address in RPCBPROC_GETADDR procedure. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31SUNRPC: parametrize rpc_uaddr2sockaddr() by network contextStanislav Kinsbursky
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>
2012-01-31SUNRPC: parametrize rpc_pton() by network contextStanislav Kinsbursky
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>
2012-01-31SUNRPC: parametrize rpc_pton6() by network contextStanislav Kinsbursky
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>
2012-01-31SUNRPC: parametrize rpc_parse_scope_id() by network contextStanislav Kinsbursky
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>
2012-01-31SUNRPC: parametrize local rpcbind clients creation with net nsStanislav Kinsbursky
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>
2012-01-31SUNRPC: register rpcbind programs in passed network namespase contextStanislav Kinsbursky
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>
2012-01-31SUNRPC: create rpcbind client in passed network namespace contextStanislav Kinsbursky
Rpcbind clients are per network namespace. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31SUNRPC: optimize net_ns dereferencing in rpcbind registering callsStanislav Kinsbursky
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>
2012-01-31SUNRPC: optimize net_ns dereferencing in rpcbind creation callsStanislav Kinsbursky
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>
2012-01-31SUNRPC: move rpcbind internals to sunrpc part of network namespace contextStanislav Kinsbursky
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>
2012-01-31SUNRPC: Fix potential races in xprt_lock_write_next()Trond Myklebust
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>
2012-01-31NFS: Ensure that mmapped pages remain stable during writebackTrond Myklebust
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>
2012-01-31NFS: Optimise away unnecessary setattrs for open(O_TRUNC);Trond Myklebust
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>
2012-01-31NFS: Move struct nfs_unique_id into struct nfs_seqid_counterTrond Myklebust
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31NFSv4: Move contents of struct rpc_sequence into struct nfs_seqid_counterTrond Myklebust
Clean up. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31NFSv41: Add a new helper nfs4_init_sequence()Trond Myklebust
Clean up Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31NFSv4: Replace lock_owner->ld_id with an ida based allocatorTrond Myklebust
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>
2012-01-31NFSv4: Replace state_owner->so_owner_id with an ida based allocatorTrond Myklebust
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>
2012-01-31NFSv4: Clean up nfs4_get_state_ownerTrond Myklebust
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31NFS: Remove unnecessary includes from linux/nfs_fs_i.hTrond Myklebust
Also from linux/nfs_xdr.h. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31SUNRPC: kernel PipeFS mount point creation routines removedStanislav Kinsbursky
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>
2012-01-31NFS: remove RPC PipeFS mount point reference from blocklayout routinesStanislav Kinsbursky
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>
2012-01-31NFS: blocklayout PipeFS notifier introducedStanislav Kinsbursky
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>
2012-01-31NFS: blocklayout pipe creation per network namespace context introducedStanislav Kinsbursky
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>
2012-01-31NFS: handle blocklayout pipe PipeFS dentry by network namespace aware routinesStanislav Kinsbursky
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>
2012-01-31NFS: idmap PipeFS notifier introducedStanislav Kinsbursky
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>
2012-01-31NFS: handle NFS idmap pipe PipeFS dentries by network namespace aware routinesStanislav Kinsbursky
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>
2012-01-31NFS: create callback transports in parent transport network namespaceStanislav Kinsbursky
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>
2012-01-31NFS: pass NFS client owner network namespace to RPC client creation routineStanislav Kinsbursky
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>
2012-01-31NFS: make NFS client allocated per network namespace contextStanislav Kinsbursky
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>
2012-01-31SUNRPC: fix pipe->ops cleanup on pipe dentry unlinkStanislav Kinsbursky
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>
2012-01-31NFS: remove RPC PipeFS mount point references from NFS cache routinesStanislav Kinsbursky
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>
2012-01-31NFS: DNS resolver PipeFS notifier introducedStanislav Kinsbursky
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>
2012-01-31NFS: DNS resolver cache per network namespace context introducedStanislav Kinsbursky
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>
2012-01-31NFS: handle NFS caches dentries by network namespace aware routinesStanislav Kinsbursky
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>
2012-01-31NFS: split cache creation and PipeFS registrationStanislav Kinsbursky
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>
2012-01-31SUNRPC: split cache creation and PipeFS registrationStanislav Kinsbursky
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>
2012-01-31SUNRPC: remove RPC PipeFS mount point reference from RPC clientStanislav Kinsbursky
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>
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