summaryrefslogtreecommitdiff
path: root/fs/nfs/nfs4client.c
AgeCommit message (Collapse)Author
2022-01-06nfs: nfs4clinet: check the return value of kstrdup()Xiaoke Wang
kstrdup() returns NULL when some internal memory errors happen, it is better to check the return value of it so to catch the memory error in time. Signed-off-by: Xiaoke Wang <xkernel.wang@foxmail.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2021-10-20NFS: Replace calls to nfs_probe_fsinfo() with nfs_probe_server()Anna Schumaker
Clean up. There are a few places where we want to probe the server, but don't actually care about the fsinfo result. Change these to use nfs_probe_server(), which handles the fattr allocation for us. Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2021-10-20NFS: Move nfs_probe_destination() into the generic clientAnna Schumaker
And rename it to nfs_probe_server(). I also change it to take the nfs_fh as an argument so callers can choose what filehandle to probe. Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2021-10-20NFS: Create an nfs4_server_set_init_caps() functionAnna Schumaker
And call it before doing an FSINFO probe to reset to the baseline capabilities before probing. Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2021-08-27NFSv4.1 add network transport when session trunking is detectedOlga Kornievskaia
After trunking is discovered in nfs4_discover_server_trunking(), add the transport to the old client structure if the allowed limit of transports has not been reached. An example: there exists a multi-homed server and client mounts one server address and some volume and then doest another mount to a different address of the same server and perhaps a different volume. Previously, the client checks that this is a session trunkable servers (same server), and removes the newly created client structure along with its transport. Now, the client adds the connection from the 2nd mount into the xprt switch of the existing client (it leads to having 2 available connections). Signed-off-by: Olga Kornievskaia <kolga@netapp.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2021-08-27NFSv4 introduce max_connect mount optionsOlga Kornievskaia
This option will control up to how many xprts can the client establish to the server with a distinct address (that means nconnect connections are not counted towards this new limit). This patch is setting up nfs structures to keeep track of the max_connect limit (does not enforce it). The default value is kept at 1 so that no current mounts that don't want any additional connections would be effected. The maximum value is set at 16. Mounts to DS are not limited to default value of 1 but instead set to the maximum default value of 16 (NFS_MAX_TRANSPORTS). Signed-off-by: Olga Kornievskaia <kolga@netapp.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2021-06-13NFSv4: Initialise connection to the server in nfs4_alloc_client()Trond Myklebust
Set up the connection to the NFSv4 server in nfs4_alloc_client(), before we've added the struct nfs_client to the net-namespace's nfs_client_list so that a downed server won't cause other mounts to hang in the trunking detection code. Reported-by: Michael Wakabayashi <mwakabayashi@vmware.com> Fixes: 5c6e5b60aae4 ("NFS: Fix an Oops in the pNFS files and flexfiles connection setup to the DS") Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2021-06-03NFS: Fix use-after-free in nfs4_init_client()Anna Schumaker
KASAN reports a use-after-free when attempting to mount two different exports through two different NICs that belong to the same server. Olga was able to hit this with kernels starting somewhere between 5.7 and 5.10, but I traced the patch that introduced the clear_bit() call to 4.13. So something must have changed in the refcounting of the clp pointer to make this call to nfs_put_client() the very last one. Fixes: 8dcbec6d20 ("NFSv41: Handle EXCHID4_FLAG_CONFIRMED_R during NFSv4.1 migration") Cc: stable@vger.kernel.org # 4.13+ Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2021-02-01nfs: Fix fall-through warnings for ClangGustavo A. R. Silva
In preparation to enable -Wimplicit-fallthrough for Clang, fix multiple warnings by explicitly add multiple break/goto/return/fallthrough statements instead of just letting the code fall through to the next case. Link: https://github.com/KSPP/linux/issues/115 Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-12-02NFSv4: Refactor to use user namespaces for nfs4idmapSargun Dhillon
In several patches work has been done to enable NFSv4 to use user namespaces: 58002399da65: NFSv4: Convert the NFS client idmapper to use the container user namespace 3b7eb5e35d0f: NFS: When mounting, don't share filesystems between different user namespaces Unfortunately, the userspace APIs were only such that the userspace facing side of the filesystem (superblock s_user_ns) could be set to a non init user namespace. This furthers the fs_context related refactoring, and piggybacks on top of that logic, so the superblock user namespace, and the NFS user namespace are the same. Users can still use rpc.idmapd if they choose to, but there are complexities with user namespaces and request-key that have yet to be addresssed. Eventually, we will need to at least: * Come up with an upcall mechanism that can be triggered inside of the container, or safely triggered outside, with the requisite context to do the right mapping. * Handle whatever refactoring needs to be done in net/sunrpc. Signed-off-by: Sargun Dhillon <sargun@sargun.me> Tested-by: Alban Crequy <alban.crequy@gmail.com> Fixes: 62a55d088cd8 ("NFS: Additional refactoring for fs_context conversion") Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2020-10-07NFS: Add READ_PLUS data segment supportAnna Schumaker
This patch adds client support for decoding a single NFS4_CONTENT_DATA segment returned by the server. This is the simplest implementation possible, since it does not account for any hole segments in the reply. Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-07-17NFSv4.0 allow nconnect for v4.0Olga Kornievskaia
It looks like this "else" is just a typo. It turns off nconnect for NFSv4.0 even though it works for every other version. Signed-off-by: Olga Kornievskaia <kolga@netapp.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2020-07-13NFSv4.2: define limits and sizes for user xattr handlingFrank van der Linden
Set limits for extended attributes (attribute value size and listxattr buffer size), based on the fs-independent limits (XATTR_*_MAX). Define the maximum XDR sizes for the RFC 8276 XATTR operations. In the case of operations that carry a larger payload (SETXATTR, GETXATTR, LISTXATTR), these exclude that payload, which is added as separate pages, like other operations do. Define, much like for read and write operations, the maximum overhead sizes for get/set/listxattr, and use them to limit the maximum payload size for those operations, in combination with the channel attributes. Signed-off-by: Frank van der Linden <fllinden@amazon.com> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2020-02-25nfs: add minor version to nfs_server_key for fscacheScott Mayhew
An NFS client that mounts multiple exports from the same NFS server with higher NFSv4 versions disabled (i.e. 4.2) and without forcing a specific NFS version results in fscache index cookie collisions and the following messages: [ 570.004348] FS-Cache: Duplicate cookie detected Each nfs_client structure should have its own fscache index cookie, so add the minorversion to nfs_server_key. Link: https://bugzilla.kernel.org/show_bug.cgi?id=200145 Signed-off-by: Scott Mayhew <smayhew@redhat.com> Signed-off-by: Dave Wysochanski <dwysocha@redhat.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFS: Additional refactoring for fs_context conversionScott Mayhew
Split out from commit "NFS: Add fs_context support." This patch adds additional refactoring for the conversion of NFS to use fs_context, namely: (*) Merge nfs_mount_info and nfs_clone_mount into nfs_fs_context. nfs_clone_mount has had several fields removed, and nfs_mount_info has been removed altogether. (*) Various functions now take an fs_context as an argument instead of nfs_mount_info, nfs_fs_context, etc. Signed-off-by: Scott Mayhew <smayhew@redhat.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFS: Rename struct nfs_parsed_mount_data to struct nfs_fs_contextDavid Howells
Rename struct nfs_parsed_mount_data to struct nfs_fs_context and rename pointers to it to "ctx". At some point this will be pointed to by an fs_context struct's fs_private pointer. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15nfs: don't pass nfs_subversion to ->create_server()Al Viro
pick it from mount_info Reviewed-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2019-11-06Merge branch 'linux-ssc-for-5.5'Trond Myklebust
2019-11-03NFSv4.1: Don't rebind to the same source port when reconnecting to the serverTrond Myklebust
NFSv2, v3 and NFSv4 servers often have duplicate replay caches that look at the source port when deciding whether or not an RPC call is a replay of a previous call. This requires clients to perform strange TCP gymnastics in order to ensure that when they reconnect to the server, they bind to the same source port. NFSv4.1 and NFSv4.2 have sessions that provide proper replay semantics, that do not look at the source port of the connection. This patch therefore ensures they can ignore the rebind requirement. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2019-11-03NFS: Use non-atomic bit ops when initialising struct nfs_client_initdataTrond Myklebust
We don't need atomic bit ops when initialising a local structure on the stack. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2019-10-09NFS: add COPY_NOTIFY operationOlga Kornievskaia
Try using the delegation stateid, then the open stateid. Only NL4_NETATTR, No support for NL4_NAME and NL4_URL. Allow only one source server address to be returned for now. To distinguish between same server copy offload ("intra") and a copy between different server ("inter"), do a check of server owner identity and also make sure server is capable of doing a copy offload. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
2019-08-04NFSv4: Fix a potential sleep while atomic in nfs4_do_reclaim()Trond Myklebust
John Hubbard reports seeing the following stack trace: nfs4_do_reclaim rcu_read_lock /* we are now in_atomic() and must not sleep */ nfs4_purge_state_owners nfs4_free_state_owner nfs4_destroy_seqid_counter rpc_destroy_wait_queue cancel_delayed_work_sync __cancel_work_timer __flush_work start_flush_work might_sleep: (kernel/workqueue.c:2975: BUG) The solution is to separate out the freeing of the state owners from nfs4_purge_state_owners(), and perform that outside the atomic context. Reported-by: John Hubbard <jhubbard@nvidia.com> Fixes: 0aaaf5c424c7f ("NFS: Cache state owners after files are closed") Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2019-07-06pNFS: Allow multiple connections to the DSTrond Myklebust
If the user specifies -onconnect=<number> mount option, and the transport protocol is TCP, then set up <number> connections to the pNFS data server as well. The connections will all go to the same IP address. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2019-07-06NFSv4: Allow multiple connections to NFSv4.x (x>0) serversTrond Myklebust
If the user specifies the -onconn=<number> mount option, and the transport protocol is TCP, then set up <number> connections to the server. The connections will all go to the same IP address. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2019-05-21treewide: Add SPDX license identifier for missed filesThomas Gleixner
Add SPDX license identifiers to all files which: - Have no license information of any form - Have EXPORT_.*_SYMBOL_GPL inside which was used in the initial scan/conversion to ignore the file These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-04-26NFS: Store the credential of the mount process in the nfs_serverTrond Myklebust
Store the credential of the mount process so that we can determine information such as the user namespace. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2019-02-20NFS: drop useless LIST_HEADJulia Lawall
Drop LIST_HEAD where the variable it declares has never been used. The semantic patch that fixes this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ identifier x; @@ - LIST_HEAD(x); ... when != x // </smpl> Fixes: 0e20162ed1e9 ("NFSv4.1 Use MDS auth flavor for data server connection") Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2019-02-20NFS: Fix up documentation warningsTrond Myklebust
Fix up some compiler warnings about function parameters, etc not being correctly described or formatted. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-12-19NFS/NFSD/SUNRPC: replace generic creds with 'struct cred'.NeilBrown
SUNRPC has two sorts of credentials, both of which appear as "struct rpc_cred". There are "generic credentials" which are supplied by clients such as NFS and passed in 'struct rpc_message' to indicate which user should be used to authorize the request, and there are low-level credentials such as AUTH_NULL, AUTH_UNIX, AUTH_GSS which describe the credential to be sent over the wires. This patch replaces all the generic credentials by 'struct cred' pointers - the credential structure used throughout Linux. For machine credentials, there is a special 'struct cred *' pointer which is statically allocated and recognized where needed as having a special meaning. A look-up of a low-level cred will map this to a machine credential. Signed-off-by: NeilBrown <neilb@suse.com> Acked-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2018-09-30NFSv4.1: Fix the r/wsize checkingTrond Myklebust
The intention of nfs4_session_set_rwsize() was to cap the r/wsize to the buffer sizes negotiated by the CREATE_SESSION. The initial code had a bug whereby we would not check the values negotiated by nfs_probe_fsinfo() (the assumption being that CREATE_SESSION will always negotiate buffer values that are sane w.r.t. the server's preferred r/wsizes) but would only check values set by the user in the 'mount' command. The code was changed in 4.11 to _always_ set the r/wsize, meaning that we now never use the server preferred r/wsizes. This is the regression that this patch fixes. Also rename the function to nfs4_session_limit_rwsize() in order to avoid future confusion. Fixes: 033853325fe3 (NFSv4.1 respect server's max size in CREATE_SESSION") Cc: stable@vger.kernel.org # v4.11+ Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-08-09NFS handle COPY reply CB_OFFLOAD call raceOlga Kornievskaia
It's possible that server replies back with CB_OFFLOAD call and COPY reply at the same time such that client will process CB_OFFLOAD before reply to COPY. For that keep a list of pending callback stateids received and then before waiting on completion check the pending list. Cleanup any pending copies on the client shutdown. Signed-off-by: Olga Kornievskaia <kolga@netapp.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2018-07-30nfs: Referrals not inheriting proto setting from parentCalum Mackay
Commit 530ea4219231 ("nfs: Referrals should use the same proto setting as their parent") encloses the fix with #ifdef CONFIG_SUNRPC_XPRT_RDMA. CONFIG_SUNRPC_XPRT_RDMA is a tristate option, so it should be tested with #if IS_ENABLED(). Fixes: 530ea4219231 ("nfs: Referrals should use the same proto setting as their parent") Reported-by: Helen Chao <helen.chao@oracle.com> Tested-by: Helen Chao <helen.chao@oracle.com> Reviewed-by: Chuck Lever <chuck.lever@oracle.com> Reviewed-by: Bill Baker <bill.baker@oracle.com> Signed-off-by: Calum Mackay <calum.mackay@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2018-02-22nfs: system crashes after NFS4ERR_MOVED recoveryBill.Baker@oracle.com
nfs4_update_server unconditionally releases the nfs_client for the source server. If migration fails, this can cause the source server's nfs_client struct to be left with a low reference count, resulting in use-after-free. Also, adjust reference count handling for ELOOP. NFS: state manager: migration failed on NFSv4 server nfsvmu10 with error 6 WARNING: CPU: 16 PID: 17960 at fs/nfs/client.c:281 nfs_put_client+0xfa/0x110 [nfs]() nfs_put_client+0xfa/0x110 [nfs] nfs4_run_state_manager+0x30/0x40 [nfsv4] kthread+0xd8/0xf0 BUG: unable to handle kernel NULL pointer dereference at 00000000000002a8 nfs4_xdr_enc_write+0x6b/0x160 [nfsv4] rpcauth_wrap_req+0xac/0xf0 [sunrpc] call_transmit+0x18c/0x2c0 [sunrpc] __rpc_execute+0xa6/0x490 [sunrpc] rpc_async_schedule+0x15/0x20 [sunrpc] process_one_work+0x160/0x470 worker_thread+0x112/0x540 ? rescuer_thread+0x3f0/0x3f0 kthread+0xd8/0xf0 This bug was introduced by 32e62b7c ("NFS: Add nfs4_update_server"), but the fix applies cleanly to 52442f9b ("NFS4: Avoid migration loops") Reported-by: Helen Chao <helen.chao@oracle.com> Fixes: 52442f9b11b7 ("NFS4: Avoid migration loops") Signed-off-by: Bill Baker <bill.baker@oracle.com> Reviewed-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2018-01-14nfs: Update server port after referral or migrationChuck Lever
After traversing a referral or recovering from a migration event, ensure that the server port reported in /proc/mounts is updated to the correct port setting for the new submount. Reported-by: Helen Chao <helen.chao@oracle.com> Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2018-01-14nfs: Referrals should use the same proto setting as their parentChuck Lever
Helen Chao <helen.chao@oracle.com> noticed that when a user traverses a referral on an NFS/RDMA mount, the resulting submount always uses TCP. This behavior does not match the vers= setting when traversing a referral (vers=4.1 is preserved). It also does not match the behavior of crossing from the pseudofs into a real filesystem (proto=rdma is preserved in that case). The Linux NFS client does not currently support the fs_locations_info attribute. The situation is similar for all NFSv4 servers I know of. Therefore until the community has broad support for fs_locations_info, when following a referral: - First try to connect with RPC-over-RDMA. This will fail quickly if the client has no RDMA-capable interfaces. - If connecting with RPC-over-RDMA fails, or the RPC-over-RDMA transport is not available, use TCP. Reported-by: Helen Chao <helen.chao@oracle.com> Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-12-15nfs: fix a deadlock in nfs client initializationScott Mayhew
The following deadlock can occur between a process waiting for a client to initialize in while walking the client list during nfsv4 server trunking detection and another process waiting for the nfs_clid_init_mutex so it can initialize that client: Process 1 Process 2 --------- --------- spin_lock(&nn->nfs_client_lock); list_add_tail(&CLIENTA->cl_share_link, &nn->nfs_client_list); spin_unlock(&nn->nfs_client_lock); spin_lock(&nn->nfs_client_lock); list_add_tail(&CLIENTB->cl_share_link, &nn->nfs_client_list); spin_unlock(&nn->nfs_client_lock); mutex_lock(&nfs_clid_init_mutex); nfs41_walk_client_list(clp, result, cred); nfs_wait_client_init_complete(CLIENTA); (waiting for nfs_clid_init_mutex) Make sure nfs_match_client() only evaluates clients that have completed initialization in order to prevent that deadlock. This patch also fixes v4.0 trunking behavior by not marking the client NFS_CS_READY until the clientid has been confirmed. Signed-off-by: Scott Mayhew <smayhew@redhat.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2017-11-17NFS: Fix bool initialization/comparisonThomas Meyer
Bool initializations should use true and false. Bool tests don't need comparisons. Signed-off-by: Thomas Meyer <thomas@m3y3r.de> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2017-11-17fs, nfs: convert nfs_client.cl_count from atomic_t to refcount_tElena Reshetova
atomic_t variables are currently used to implement reference counters with the following properties: - counter is initialized to 1 using atomic_set() - a resource is freed upon counter reaching zero - once counter reaches zero, its further increments aren't allowed - counter schema uses basic atomic operations (set, inc, inc_not_zero, dec_and_test, etc.) Such atomic variables should be converted to a newly provided refcount_t type and API that prevents accidental counter overflows and underflows. This is important since overflows and underflows can lead to use-after-free situation and be exploitable. The variable nfs_client.cl_count is used as pure reference counter. Convert it to refcount_t and fix up the operations. Suggested-by: Kees Cook <keescook@chromium.org> Reviewed-by: David Windsor <dwindsor@gmail.com> Reviewed-by: Hans Liljestrand <ishkamiel@gmail.com> Signed-off-by: Elena Reshetova <elena.reshetova@intel.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2017-08-02NFSv4: Fix double frees in nfs4_test_session_trunk()Trond Myklebust
rpc_clnt_add_xprt() expects the callback function to be synchronous, and expects to release the transport and switch references itself. Fixes: 04fa2c6bb51b1 ("NFS pnfs data server multipath session trunking") Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2017-07-13NFSv4.1: Handle EXCHGID4_FLAG_CONFIRMED_R during NFSv4.1 migrationChuck Lever
Transparent State Migration copies a client's lease state from the server where a filesystem used to reside to the server where it now resides. When an NFSv4.1 client first contacts that destination server, it uses EXCHANGE_ID to detect trunking relationships. The lease that was copied there is returned to that client, but the destination server sets EXCHGID4_FLAG_CONFIRMED_R when replying to the client. This is because the lease was confirmed on the source server (before it was copied). Normally, when CONFIRMED_R is set, a client purges the lease and creates a new one. However, that throws away the entire benefit of Transparent State Migration. Therefore, the client must not purge that lease when it is possible that Transparent State Migration has occurred. Reported-by: Xuan Qi <xuan.qi@oracle.com> Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Tested-by: Xuan Qi <xuan.qi@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2017-05-24NFSv4.0: Fix a lock leak in nfs40_walk_client_listTrond Myklebust
Xiaolong Ye's kernel test robot detected the following Oops: [ 299.158991] BUG: scheduling while atomic: mount.nfs/9387/0x00000002 [ 299.169587] 2 locks held by mount.nfs/9387: [ 299.176165] #0: (nfs_clid_init_mutex){......}, at: [<ffffffff8130cc92>] nfs4_discover_server_trunking+0x47/0x1fc [ 299.201802] #1: (&(&nn->nfs_client_lock)->rlock){......}, at: [<ffffffff813125fa>] nfs40_walk_client_list+0x2e9/0x338 [ 299.221979] CPU: 0 PID: 9387 Comm: mount.nfs Not tainted 4.11.0-rc7-00021-g14d1bbb #45 [ 299.235584] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014 [ 299.251176] Call Trace: [ 299.255192] dump_stack+0x61/0x7e [ 299.260416] __schedule_bug+0x65/0x74 [ 299.266208] __schedule+0x5d/0x87c [ 299.271883] schedule+0x89/0x9a [ 299.276937] schedule_timeout+0x232/0x289 [ 299.283223] ? detach_if_pending+0x10b/0x10b [ 299.289935] schedule_timeout_uninterruptible+0x2a/0x2c [ 299.298266] ? put_rpccred+0x3e/0x115 [ 299.304327] ? schedule_timeout_uninterruptible+0x2a/0x2c [ 299.312851] msleep+0x1e/0x22 [ 299.317612] nfs4_discover_server_trunking+0x102/0x1fc [ 299.325644] nfs4_init_client+0x13f/0x194 It looks as if we recently added a spin_lock() leak to nfs40_walk_client_list() when cleaning up the code. Reported-by: kernel test robot <xiaolong.ye@intel.com> Fixes: 14d1bbb0ca42 ("NFS: Create a common nfs4_match_client() function") Cc: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-20NFS: Remove extra dprintk()s from nfs4client.cAnna Schumaker
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-20NFS: Clean up nfs4_init_server()Anna Schumaker
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-20NFS: Clean up nfs4_set_client()Anna Schumaker
If we cut out the dprintk()s, then we can return error codes directly and cut out the goto. Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-20NFS: Clean up nfs4_check_server_scope()Anna Schumaker
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-20NFS: Clean up nfs4_check_serverowner_major_id()Anna Schumaker
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-20NFS: Create a common nfs4_match_client() functionAnna Schumaker
This puts all the common code in a single place for the walk_client_list() functions. Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-20NFS: Clean up nfs4_check_serverowner_minor_id()Anna Schumaker
Once again, we can remove the function and compare integer values directly. Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-04-20NFS: Clean up nfs4_match_clientids()Anna Schumaker
If we cut out the dprintk()s, then we don't even need this to be a separate function. Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2017-03-17NFSv4.1 respect server's max size in CREATE_SESSIONOlga Kornievskaia
Currently client doesn't respect max sizes server returns in CREATE_SESSION. nfs4_session_set_rwsize() gets called and server->rsize, server->wsize are 0 so they never get set to the sizes returned by the server. Signed-off-by: Olga Kornievskaia <kolga@netapp.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>