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* NFS: start printks w/ NFS: even if __func__ shownWeston Andros Adamson2012-02-06
| | | | | | | | 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>
* NFS: printks in fs/nfs/ should start with NFS:Weston Andros Adamson2012-02-06
| | | | | | | | | | | | 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>
* NFS: Call test_stateid() and free_stateid() with correct stateidsBryan Schumaker2012-02-06
| | | | | | | | | | | | 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>
* NFS: Pass a stateid to test_stateid() and free_stateid()Bryan Schumaker2012-02-06
| | | | | | | | 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>
* NFSv4: ACCESS validation doesn't require a full attribute refreshTrond Myklebust2012-01-31
| | | | | | | 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>
* NFSv4: Don't decode fs_locations if we didn't ask for them...Trond Myklebust2012-01-31
| | | | | | | 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>
* nfs: remove unneeded NULL pointer check in nfs4_remote_mountJeff Layton2012-01-31
| | | | | | | | "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>
* pnfs: clean up initiate_file_draining layout lookupBenny Halevy2012-01-31
| | | | | | | | | | | 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>
* NFS: Use kcalloc() when allocating arraysTrond Myklebust2012-01-31
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4: Avoid thundering herd issues with nfs_release_seqidTrond Myklebust2012-01-31
| | | | | | | 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>
* SUNRPC: constify the rpc_programTrond Myklebust2012-01-31
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: remove unused nfs4_find_client_no_ident functionStanislav Kinsbursky2012-01-31
| | | | | | | | 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>
* SUNRPC: register RPC stats /proc entries in passed network namespace contextStanislav Kinsbursky2012-01-31
| | | | | | | | 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>
* NFS: decode destination address in proper network namespace contextStanislav Kinsbursky2012-01-31
| | | | | | | | 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>
* NFS: parse DNS cache in proper network namespace contextStanislav Kinsbursky2012-01-31
| | | | | | | 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>
* SUNRPC: parametrize rpc_pton() by network contextStanislav Kinsbursky2012-01-31
| | | | | | | | 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>
* SUNRPC: Fix potential races in xprt_lock_write_next()Trond Myklebust2012-01-31
| | | | | | | | 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>
* NFS: Ensure that mmapped pages remain stable during writebackTrond Myklebust2012-01-31
| | | | | | | | | | | 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>
* NFS: Optimise away unnecessary setattrs for open(O_TRUNC);Trond Myklebust2012-01-31
| | | | | | | | 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>
* NFS: Move struct nfs_unique_id into struct nfs_seqid_counterTrond Myklebust2012-01-31
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4: Move contents of struct rpc_sequence into struct nfs_seqid_counterTrond Myklebust2012-01-31
| | | | | | Clean up. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv41: Add a new helper nfs4_init_sequence()Trond Myklebust2012-01-31
| | | | | | Clean up Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4: Replace lock_owner->ld_id with an ida based allocatorTrond Myklebust2012-01-31
| | | | | | | | | | 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>
* NFSv4: Replace state_owner->so_owner_id with an ida based allocatorTrond Myklebust2012-01-31
| | | | | | | 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>
* NFSv4: Clean up nfs4_get_state_ownerTrond Myklebust2012-01-31
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Remove unnecessary includes from linux/nfs_fs_i.hTrond Myklebust2012-01-31
| | | | | | Also from linux/nfs_xdr.h. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: remove RPC PipeFS mount point reference from blocklayout routinesStanislav Kinsbursky2012-01-31
| | | | | | | | | | | | 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>
* NFS: blocklayout PipeFS notifier introducedStanislav Kinsbursky2012-01-31
| | | | | | | | | | | | 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>
* NFS: blocklayout pipe creation per network namespace context introducedStanislav Kinsbursky2012-01-31
| | | | | | | | | | | | | | | | | | 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>
* NFS: handle blocklayout pipe PipeFS dentry by network namespace aware routinesStanislav Kinsbursky2012-01-31
| | | | | | | | | 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>
* NFS: idmap PipeFS notifier introducedStanislav Kinsbursky2012-01-31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* NFS: handle NFS idmap pipe PipeFS dentries by network namespace aware routinesStanislav Kinsbursky2012-01-31
| | | | | | | | | 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>
* NFS: create callback transports in parent transport network namespaceStanislav Kinsbursky2012-01-31
| | | | | | | | | 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>
* NFS: pass NFS client owner network namespace to RPC client creation routineStanislav Kinsbursky2012-01-31
| | | | | | | | 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>
* NFS: make NFS client allocated per network namespace contextStanislav Kinsbursky2012-01-31
| | | | | | | | | | | | 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>
* NFS: remove RPC PipeFS mount point references from NFS cache routinesStanislav Kinsbursky2012-01-31
| | | | | | | | | | | | 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>
* NFS: DNS resolver PipeFS notifier introducedStanislav Kinsbursky2012-01-31
| | | | | | | | | | | | 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>
* NFS: DNS resolver cache per network namespace context introducedStanislav Kinsbursky2012-01-31
| | | | | | | | | | | | | | | | | | | 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>
* NFS: handle NFS caches dentries by network namespace aware routinesStanislav Kinsbursky2012-01-31
| | | | | | | | 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>
* NFS: split cache creation and PipeFS registrationStanislav Kinsbursky2012-01-31
| | | | | | | | | | 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>
* SUNRPC: split cache creation and PipeFS registrationStanislav Kinsbursky2012-01-31
| | | | | | | | | | 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>
* SUNRPC: remove RPC PipeFS mount point reference from RPC clientStanislav Kinsbursky2012-01-31
| | | | | | | 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>
* SUNRPC: split SUNPRC PipeFS dentry and private pipe data creationStanislav Kinsbursky2012-01-31
| | | | | | | | | | | | | | 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>
* SUNPRC: cleanup RPC PipeFS pipes upcall interfaceStanislav Kinsbursky2012-01-31
| | | | | | | | 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>
* Merge tag 'nfs-for-3.3-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfsLinus Torvalds2012-01-16
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | NFS client bugfixes and cleanups for Linux 3.3 (pull 2) * tag 'nfs-for-3.3-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: pnfsblock: alloc short extent before submit bio pnfsblock: remove rpc_call_ops from struct parallel_io pnfsblock: move find lock page logic out of bl_write_pagelist pnfsblock: cleanup bl_mark_sectors_init pnfsblock: limit bio page count pnfsblock: don't spinlock when freeing block_dev pnfsblock: clean up _add_entry pnfsblock: set read/write tk_status to pnfs_error pnfsblock: acquire im_lock in _preload_range NFS4: fix compile warnings in nfs4proc.c nfs: check for integer overflow in decode_devicenotify_args() NFS: cleanup endian type in decode_ds_addr() NFS: add an endian notation
| * pnfsblock: alloc short extent before submit bioPeng Tao2012-01-12
| | | | | | | | | | | | | | | | | | | | | | | | As discussed earlier, it is better for block client to allocate memory for tracking extents state before submitting bio. So the patch does it by allocating a short_extent for every INVALID extent touched by write pagelist and for every zeroing page we created, saving them in layout header. Then in end_io we can just use them to create commit list items and avoid memory allocation there. Signed-off-by: Peng Tao <peng_tao@emc.com> Signed-off-by: Benny Halevy <bhalevy@tonian.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * pnfsblock: remove rpc_call_ops from struct parallel_ioPeng Tao2012-01-12
| | | | | | | | | | | | | | | | block layout can just make use of generic read/write_done. Signed-off-by: Peng Tao <peng_tao@emc.com> Signed-off-by: Benny Halevy <bhalevy@tonian.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * pnfsblock: move find lock page logic out of bl_write_pagelistPeng Tao2012-01-12
| | | | | | | | | | | | | | | | Also avoid unnecessary lock_page if page is handled by others. Signed-off-by: Peng Tao <peng_tao@emc.com> Signed-off-by: Benny Halevy <bhalevy@tonian.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * pnfsblock: cleanup bl_mark_sectors_initPeng Tao2012-01-12
| | | | | | | | | | | | | | | | | | It does not need to manipulate on partial initialized blocks. Writeback code takes care of it. Signed-off-by: Peng Tao <peng_tao@emc.com> Signed-off-by: Benny Halevy <bhalevy@tonian.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * pnfsblock: limit bio page countPeng Tao2012-01-12
| | | | | | | | | | | | | | | | | | | | One bio can have at most BIO_MAX_PAGES pages. We should limit it bec otherwise bio_alloc will fail when there are many pages in one read/write_pagelist. Cc: <stable@vger.kernel.org> #3.1+ Signed-off-by: Peng Tao <peng_tao@emc.com> Signed-off-by: Benny Halevy <bhalevy@tonian.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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