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2012-02-27NFS: release per-net clients lock before calling PipeFS dentries creationStanislav Kinsbursky1-6/+24
v3: 1) Lookup for client is performed from the beginning of the list on each PipeFS event handling operation. Lockdep is sad otherwise, because inode mutex is taken on PipeFS dentry creation, which can be called on mount notification, where this per-net client lock is taken on clients list walk. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-26NFSv4.1: Don't call nfs4_deviceid_purge_client() unless we're NFSv4.1Trond Myklebust2-6/+4
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-19NFS: Ensure struct nfs_client holds a reference to the net namespaceTrond Myklebust1-1/+2
Otherwise we have no guarantee that the net namespace won't just disappear from underneath us once the task that created it is destroyed. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: Stanislav Kinsbursky <skinsbursky@parallels.com>
2012-02-19NFS: Ensure that the nfs_client 'net' field is always setTrond Myklebust1-2/+1
Currently, the nfs_parsed_mount_data->net field is initialised in the nfs_parse_mount_options() function, which means that it only gets set if we're using text based mounts. The legacy binary mount interface is therefore broken. Fix is to initialise the ->net field in nfs_alloc_parsed_mount_data. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: Stanislav Kinsbursky <skinsbursky@parallels.com>
2012-02-17NFS: include filelayout DS rpc stats in mountstatsWeston Andros Adamson1-0/+19
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>
2012-02-17NFSv4.1 set highest_used_slotid to NFS4_NO_SLOTAndy Adamson1-1/+1
Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-16nfs: Clean up debugging in nfs_follow_mountpoint()Chuck Lever1-1/+4
Clean up: Fix a debugging message which had an obsolete function name in it (nfs_follow_mountpoint). Introduced by commit 36d43a43 "NFS: Use d_automount() rather than abusing follow_link()" (January 14, 2011) Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-15nfs41: Verify channel's attributes accordingly to RFC v2Vitaliy Gusev1-2/+4
ca_maxoperations: For the backchannel, the server MUST NOT change the value the client offers. For the fore channel, the server MAY change the requested value. ca_maxrequests: For the backchannel, the server MUST NOT change the value the client offers. For the fore channel, the server MAY change the requested value. Signed-off-by: Vitaliy Gusev <gusev.vitaliy@nexenta.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-15NFS: dont allow minorversion= opt when vers != 4Weston Andros Adamson1-0/+7
Don't allow invalid 'vers' and 'minorversion' combinations in mount options, such as "vers=3,minorversion=1". Signed-off-by: Weston Andros Adamson <dros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-15NFSv4: Further reduce the footprint of the idmapperTrond Myklebust1-6/+36
Don't allocate the legacy idmapper tables until we actually need them. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Reviewed-by: Jeff Layton <jlayton@redhat.com>
2012-02-15NFSv4: The idmapper now depends on keyring functionalityTrond Myklebust1-1/+1
Add the appropriate 'select KEYS' to the NFSv4 Kconfig entry. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-15NFSv4: Reduce the footprint of the idmapperTrond Myklebust1-3/+13
Instead of pre-allocating the storage for all the strings, we can significantly reduce the size of that table by doing the allocation when we do the downcall. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Reviewed-by: Jeff Layton <jlayton@redhat.com>
2012-02-15NFS: add mount options 'v4.0' and 'v4.1'Weston Andros Adamson1-1/+13
Signed-off-by: Weston Andros Adamson <dros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-15NFS: fix nfs4_find_client_sessionid() arguments listStanislav Kinsbursky1-1/+1
It's not compilable in case of CONFIG_NFS_V4_1 is not set. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-15NFS: Initialise the nfs_net->nfs_client_lockTrond Myklebust1-2/+6
Ensure that we initialise the nfs_net->nfs_client_lock spinlock. Also ensure that nfs_server_remove_lists() doesn't try to dereference server->nfs_client before that is initialised. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: Stanislav Kinsbursky <skinsbursky@parallels.com>
2012-02-15Lockd: shutdown NLM hosts in network namespace contextStanislav Kinsbursky2-8/+22
Lockd now managed in network namespace context. And this patch introduces network namespace related NLM hosts shutdown in case of releasing per-net Lockd resources. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-15LockD: make NSM network namespace awareStanislav Kinsbursky1-6/+7
NLM host is network namespace aware now. So NSM have to take it into account. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-15LockD: make nlm hosts network namespace awareStanislav Kinsbursky3-3/+17
This object depends on RPC client, and thus on network namespace. So let's make it's allocation and lookup in network namespace context. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-15Lockd: per-net up and down routines introducedStanislav Kinsbursky1-2/+45
This patch introduces per-net Lockd initialization and destruction routines. The logic is the same as in global Lockd up and down routines. Probably the solution is not the best one. But at least it looks clear. So per-net "up" routine are called only in case of lockd is running already. If per-net resources are not allocated yet, then service is being registered with local portmapper and lockd sockets created. Per-net "down" routine is called on every lockd_down() call in case of global users counter is not zero. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-15Lockd: pernet usage counter introducedStanislav Kinsbursky2-3/+54
Lockd is going to be shared between network namespaces - i.e. going to be able to handle lock requests from different network namespaces. This means, that network namespace related resources have to be allocated not once (like now), but for every network namespace context, from which service is requested to operate. This patch implements Lockd per-net users accounting. New per-net counter is used to determine, when per-net resources have to be freed. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-15Lockd: create permanent lockd sockets in current network namespaceStanislav Kinsbursky1-10/+13
This patch parametrizes Lockd permanent sockets creation routine by network namespace context. It also replaces hard-coded init_net with current network namespace context in Lockd sockets creation routines. This approach looks safe, because Lockd is created during NFS mount (or NFS server start) and thus socket is required exactly in current network namespace context. But in the same time it means, that Lockd sockets inherits first Lockd requester network namespace. This issue will be fixed in further patches of the series. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-15NFSv4.1: Add a module parameter to set the number of session slotsTrond Myklebust1-1/+7
Add the module parameter 'max_session_slots' to set the initial number of slots that the NFSv4.1 client will attempt to negotiate with the server. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-15NFSv4.1: Convert slotid from u8 to u32Trond Myklebust3-26/+24
It is perfectly legal to negotiate up to 2^32-1 slots in the protocol, and with 10GigE, we are already seeing that 255 slots is far too limiting. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-06NFS: build fixed in case of NFS_USE_NEW_IDMAPPER is undefinedStanislav Kinsbursky1-0/+1
Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-06NFS: pass transport net to rpc_pton() while parse server nameStanislav Kinsbursky1-3/+3
Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-06NFS: pass current net to rpc_pton() while parsing mount optionsStanislav Kinsbursky1-2/+2
Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-06NFS: search for client session id in proper network namespaceStanislav Kinsbursky5-4/+7
Network namespace is taken from request transport and passed as a part of cb_process_state structure. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-06NFS: pass proper net rpc_pton() in nfs_dns_resolve_name()Stanislav Kinsbursky1-1/+1
Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-06NFS: make nfs_client_lock per net nsStanislav Kinsbursky4-27/+32
This patch makes nfs_clients_lock allocated per network namespace. All items it protects are already network namespace aware. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-06NFS: make cb_ident_idr per net nsStanislav Kinsbursky5-14/+25
This patch makes ID's infrastructure network namespace aware. This was done mainly because of nfs_client_lock, which is desired to be per network namespace, but protects NFS clients ID's. NOTE: NFS client's net pointer have to be set prior to ID initialization, proper assignment was moved. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-06NFS: make nfs_volume_list per net nsStanislav Kinsbursky2-6/+15
This patch splits global list of NFS servers into per-net-ns array of lists. This looks more strict and clearer. BTW, this patch also makes "/proc/fs/nfsfs/volumes" content depends on /proc mount owner pid namespace. See below for details. NOTE: few words about how was /proc/fs/nfsfs/ entries content show per network namespace done. This is a little bit tricky and not the best is could be. But it's cheap (proper fix for /proc conteinerization is a hard nut to crack). The idea is simple: take proper network namespace from pid namespace child reaper nsproxy of /proc/ mount creator. This actually means, that if there are 2 containers with different net namespace sharing pid namespace, then read of /proc/fs/nfsfs/ entries will always return content, taken from net namespace of pid namespace creator task (and thus second namespace set wil be unvisible). Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-06NFS: make nfs_client_list per net nsStanislav Kinsbursky5-15/+32
This patch splits global list of NFS clients into per-net-ns array of lists. This looks more strict and clearer. BTW, this patch also makes "/proc/fs/nfsfs/servers" entry content depends on /proc mount owner pid namespace. See below for details. NOTE: few words about how was /proc/fs/nfsfs/ entries content show per network namespace done. This is a little bit tricky and not the best is could be. But it's cheap (proper fix for /proc conteinerization is a hard nut to crack). The idea is simple: take proper network namespace from pid namespace child reaper nsproxy of /proc/ mount creator. This actually means, that if there are 2 containers with different net namespace sharing pid namespace, then read of /proc/fs/nfsfs/ entries will always return content, taken from net namespace of pid namespace creator task (and thus second namespace set wil be unvisible). Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-06NFS: Keep idmapper include files in one placeBryan Schumaker1-35/+31
Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-06NFS: Fall back on old idmapper if request_key() failsBryan Schumaker3-67/+37
This patch removes the CONFIG_NFS_USE_NEW_IDMAPPER compile option. First, the idmapper will attempt to map the id using /sbin/request-key and nfsidmap. If this fails (if /etc/request-key.conf is not configured properly) then the idmapper will call the legacy code to perform the mapping. I left a comment stating where the legacy code begins to make it easier for somebody to remove in the future. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-06NFS: Fix comparison between DS address listsWeston Andros Adamson1-47/+24
data_server_cache entries should only be treated as the same if the address list hasn't changed. A new entry will be made when an MDS changes an address list (as seen by GETDEVINFO). The old entry will be freed once all references are gone. Signed-off-by: Weston Andros Adamson <dros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-06NFS: start printks w/ NFS: even if __func__ shownWeston Andros Adamson14-43/+48
This patch addresses printks that have some context to show that they are from fs/nfs/, but for the sake of consistency now start with NFS: Signed-off-by: Weston Andros Adamson <dros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-06NFS: printks in fs/nfs/ should start with NFS:Weston Andros Adamson5-5/+6
Messages like "Got error -10052 from the server on DESTROY_SESSION. Session has been destroyed regardless" can be confusing to users who aren't very familiar with NFS. NOTE: This patch ignores any printks() that start by printing __func__ - that will be in a separate patch. Signed-off-by: Weston Andros Adamson <dros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-06NFS: Call test_stateid() and free_stateid() with correct stateidsBryan Schumaker1-11/+47
I noticed that test_stateid() was always using the same stateid for open and lock recovery. After poking around a bit, I discovered that it was always testing with a delegation stateid (even if there was no delegation present). I figured this wasn't correct, so now delegation and open stateids are tested during open_expired() and lock stateids are tested during lock_expired(). Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-06NFS: Pass a stateid to test_stateid() and free_stateid()Bryan Schumaker2-16/+24
This takes the guesswork out of what stateid to use. The caller is expected to figure this out and pass in the correct one. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31NFSv4: ACCESS validation doesn't require a full attribute refreshTrond Myklebust1-1/+1
We only really need to check the change attribute, so let's just use the server->cache_consistency_bitmask. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31NFSv4: Don't decode fs_locations if we didn't ask for them...Trond Myklebust1-9/+14
Currently, the server can potentially cause us to Oops by returning an fs_locations request that we didn't actually request. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31nfs: remove unneeded NULL pointer check in nfs4_remote_mountJeff Layton1-2/+1
"data" is never NULL here. Reported-by: Eric Paris <eparis@redhat.com> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31pnfs: clean up initiate_file_draining layout lookupBenny Halevy1-18/+38
Fixes the following compiler warning: fs/nfs/callback_proc.c: In function 'do_callback_layoutrecall': fs/nfs/callback_proc.c:115:26: warning: 'lo' may be used uninitialized in this function Reported-by: Jim Rees <rees@umich.edu> Signed-off-by: Benny Halevy <bhalevy@tonian.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31NFS: Use kcalloc() when allocating arraysTrond Myklebust2-2/+2
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31NFSv4: Avoid thundering herd issues with nfs_release_seqidTrond Myklebust2-6/+16
Store a pointer to the rpc_task in struct nfs_seqid so that we can wake up only that request that is able to grab the lock after we've released it. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31SUNRPC: constify the rpc_programTrond Myklebust10-26/+26
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31SUNRPC: search for service transports in network namespace contextStanislav Kinsbursky2-3/+3
Service transports are parametrized by network namespace. And thus lookup of transport instance have to take network namespace into account. 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>
2012-01-31NFS: remove unused nfs4_find_client_no_ident functionStanislav Kinsbursky2-28/+0
Looks like this function survived after some cleanup patch without a reason. Now it's not called or referenced and I believe, that it can be simply removed. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-31SUNRPC: register service stats /proc entries in passed network namespace contextStanislav Kinsbursky1-2/+3
This patch makes it possible to create NFSd program entry ("/proc/net/rpc/nfsd") 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>
2012-01-31SUNRPC: register RPC stats /proc entries in passed network namespace contextStanislav Kinsbursky1-3/+3
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>
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