- 18 6月, 2009 40 次提交
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由 Andy Adamson 提交于
The NFS v4.1 callback service has already been setup, and rpc_xprt->serv points to the svc_serv structure describing it. Invoke the xprt_setup_backchannel() initialization to pre- allocate the necessary backchannel structures. Signed-off-by: NRicardo Labiaga <ricardo.labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41: change nfs4_put_session(nfs4_session**) to nfs4_destroy_session(nfs_session*)] Signed-off-by: NAlexandros Batsakis <Alexandros.Batsakis@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [moved xprt_setup_backchannel from nfs4_init_session to nfs4_init_backchannel] Signed-off-by: NAndy Adamson <andros@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com>
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由 Andy Adamson 提交于
Tracks the nfs_callback_info for both versions, enabling the callback service for v4 and v4.1 to run concurrently and be stopped independently of each other. Signed-off-by: NRicardo Labiaga <ricardo.labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com>
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由 Benny Halevy 提交于
Signed-off-by: NBenny Halevy <bhalevy@panasas.com>
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由 Andy Adamson 提交于
This svc_xprt is passed on to the callback service thread to be later used to processes incoming svc_rqst's Signed-off-by: NBenny Halevy <bhalevy@panasas.com>
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由 Benny Halevy 提交于
For nfs41 callbacks we need an svc_xprt to process requests coming up the backchannel socket as rpc_rqst's that are transformed into svc_rqst's that need a rq_xprt to be processed. The svc_{udp,tcp}_create methods are too heavy for this job as svc_create_socket creates an actual socket to listen on while for nfs41 we're "reusing" the fore channel's socket. Signed-off-by: NBenny Halevy <bhalevy@panasas.com>
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由 Ricardo Labiaga 提交于
nfs41_callback_up() initializes the necessary queues and creates the new nfs41_callback_svc thread. This thread executes the callback service which waits for requests to arrive on the svc_serv->sv_cb_list. NFS41_BC_MIN_CALLBACKS is set to 1 because we expect callbacks to not cause substantial latency. The actual processing of the callback will be implemented as a separate patch. There is only one NFSv4.1 callback service. The first caller of nfs4_callback_up() creates the service, subsequent callers increment a reference count on the service. The service is destroyed when the last caller invokes nfs_callback_down(). The transport needs to hold a reference to the callback service in order to invoke it during callback processing. Currently this reference is only obtained when the service is first created. This is incorrect, since subsequent registrations for other transports will leave the xprt->serv pointer uninitialized, leading to an oops when a callback arrives on the "unreferenced" transport. This patch fixes the problem by ensuring that a reference to the service is saved in xprt->serv, either because the service is created by this invocation to nfs4_callback_up() or by a prior invocation. Signed-off-by: NRicardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41: Add a reference to svc_serv during callback service bring up] Signed-off-by: NRicardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [Type check arguments of nfs_callback_up] Signed-off-by: NRicardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41: save svc_serv in nfs_callback_info] Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [Removal of ugly #ifdefs] [nfs41: Update to removal of ugly #ifdefs] Signed-off-by: NRicardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com>
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由 Ricardo Labiaga 提交于
Implement the NFSv4.1 backchannel service. Invokes the common callback processing logic svc_process_common() to authenticate the call and dispatch the appropriate NFSv4.1 XDR decoder and operation procedure. It then invokes bc_send() to send the reply over the same connection. bc_send() is implemented in a separate patch. At this time there is no slot validation or reply cache handling. [nfs41: Preallocate rpc_rqst receive buffer for handling callbacks] Signed-off-by: NRicardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [Move bc_svc_process() declaration to correct patch] Signed-off-by: NRicardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com>
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由 Ricardo Labiaga 提交于
net/sunrpc/svc.c:svc_process() is used by the NFSv4 callback service to process RPC requests arriving over connections initiated by the server. NFSv4.1 supports callbacks over the backchannel on connections initiated by the client. This patch refactors svc_process() so that common code can also be used by the backchannel. Signed-off-by: NRicardo Labiaga <ricardo.labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com>
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由 Ricardo Labiaga 提交于
Executes the backchannel task on the RPC state machine using the existing open connection previously established by the client. Signed-off-by: NRicardo Labiaga <ricardo.labiaga@netapp.com> nfs41: Add bc_svc.o to sunrpc Makefile. [nfs41: bc_send() does not need to be exported outside RPC module] [nfs41: xprt_free_bc_request() need not be exported outside RPC module] Signed-off-by: NRicardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [Update copyright] Signed-off-by: NRicardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com>
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由 Ricardo Labiaga 提交于
Adds rpc_run_bc_task() which is called by the NFS callback service to process backchannel requests. It performs similar work to rpc_run_task() though "schedules" the backchannel task to be executed starting at the call_trasmit state in the RPC state machine. It also introduces some miscellaneous updates to the argument validation, call_transmit, and transport cleanup functions to take into account that there are now forechannel and backchannel tasks. Backchannel requests do not carry an RPC message structure, since the payload has already been XDR encoded using the existing NFSv4 callback mechanism. Introduce a new transmit state for the client to reply on to backchannel requests. This new state simply reserves the transport and issues the reply. In case of a connection related error, disconnects the transport and drops the reply. It requires the forechannel to re-establish the connection and the server to retransmit the request, as stated in NFSv4.1 section 2.9.2 "Client and Server Transport Behavior". Note: There is no need to loop attempting to reserve the transport. If EAGAIN is returned by xprt_prepare_transmit(), return with tk_status == 0, setting tk_action to call_bc_transmit. rpc_execute() will invoke it again after the task is taken off the sleep queue. [nfs41: rpc_run_bc_task() need not be exported outside RPC module] [nfs41: New call_bc_transmit RPC state] Signed-off-by: NRicardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41: Backchannel: No need to loop in call_bc_transmit()] Signed-off-by: NAndy Adamson <andros@netapp.com> Signed-off-by: NRicardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [rpc_count_iostats incorrectly exits early] Signed-off-by: NRicardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [Convert rpc_reply_expected() to inline function] [Remove unnecessary BUG_ON()] [Rename variable] Signed-off-by: NRicardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com>
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由 Ricardo Labiaga 提交于
Handles RPC replies and backchannel callbacks. Traditionally the NFS client has expected only RPC replies on its open connections. With NFSv4.1, callbacks can arrive over an existing open connection. This patch refactors the old xs_tcp_read_request() into an RPC reply handler: xs_tcp_read_reply(), a new backchannel callback handler: xs_tcp_read_callback(), and a common routine to read the data off the transport: xs_tcp_read_common(). The new xs_tcp_read_callback() queues callback requests onto a queue where the callback service (a separate thread) is listening for the processing. This patch incorporates work and suggestions from Rahul Iyer (iyer@netapp.com) and Benny Halevy (bhalevy@panasas.com). xs_tcp_read_callback() drops the connection when the number of expected callbacks is exceeded. Use xprt_force_disconnect(), ensuring tasks on the pending queue are awaken on disconnect. [nfs41: Keep track of RPC call/reply direction with a flag] [nfs41: Preallocate rpc_rqst receive buffer for handling callbacks] Signed-off-by: NRicardo Labiaga <ricardo.labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41: sunrpc: xs_tcp_read_callback() should use xprt_force_disconnect()] Signed-off-by: NRicardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [Moves embedded #ifdefs into #ifdef function blocks] Signed-off-by: NRicardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com>
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由 Ricardo Labiaga 提交于
Contains prototype for backchannel helper routines. Signed-off-by: NRicardo Labiaga <ricardo.labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41: xprt_setup_backchannel v4.0 only inline] Fix compile error when CONFIG_NFS_V4_1 is not set. Signed-off-by: NAndy Adamson <andros@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [Update Copyright notice and fix formatting] Signed-off-by: NRicardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com>
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由 Ricardo Labiaga 提交于
This patch introduces support to setup the callback xprt on the client side. It allocates/ destroys the preallocated memory structures used to process backchannel requests. At setup time, xprt_setup_backchannel() is invoked to allocate one or more rpc_rqst structures and substructures. This ensures that they are available when an RPC callback arrives. The rpc_rqst structures are maintained in a linked list attached to the rpc_xprt structure. We keep track of the number of allocations so that they can be correctly removed when the channel is destroyed. When an RPC callback arrives, xprt_alloc_bc_request() is invoked to obtain a preallocated rpc_rqst structure. An rpc_xprt structure is returned, and its RPC_BC_PREALLOC_IN_USE bit is set in rpc_xprt->bc_flags. The structure is removed from the the list since it is now in use, and it will be later added back when its user is done with it. After the RPC callback replies, the rpc_rqst structure is returned by invoking xprt_free_bc_request(). This clears the RPC_BC_PREALLOC_IN_USE bit and adds it back to the list, allowing it to be reused by a subsequent RPC callback request. To be consistent with the reception of RPC messages, the backchannel requests should be placed into the 'struct rpc_rqst' rq_rcv_buf, which is then in turn copied to the 'struct rpc_rqst' rq_private_buf. [nfs41: Preallocate rpc_rqst receive buffer for handling callbacks] Signed-off-by: NRicardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [Update copyright notice and explain page allocation] Signed-off-by: NRicardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com>
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由 Ricardo Labiaga 提交于
Signed-off-by: NRicardo Labiaga <ricardo.labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com>
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由 Ricardo Labiaga 提交于
Adds new list of rpc_xprt structures, and a readers/writers lock to protect the list. The list is used to preallocate resources for the backchannel during backchannel requests. Callbacks are not expected to cause significant latency, so only one callback will be allowed at this time. It also adds a pointer to the NFS callback service so that requests can be directed to it for processing. New callback members added to svc_serv. The NFSv4.1 callback service will sleep on the svc_serv->svc_cb_waitq until new callback requests arrive. The request will be queued in svc_serv->svc_cb_list. This patch adds this list, the sleep queue and spinlock to svc_serv. [nfs41: NFSv4.1 callback support] Signed-off-by: NRicardo Labiaga <ricardo.labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com>
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由 Benny Halevy 提交于
move nfs4_init_callback into nfs4_init_client_minor_version and nfs4_destroy_callback into nfs4_clear_client_minor_version as these need to happen also when auto-negotiating the minorversion once the callback service for nfs41 becomes different than for nfs4.0 Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41: Fix checkpatch warning] Signed-off-by: NRicardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [Type check arguments of nfs_callback_up] Signed-off-by: NRicardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41: Backchannel: Remove FIXME comment] Signed-off-by: NRicardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com>
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由 Benny Halevy 提交于
Refactor-out code to bring the callback service up and down. Signed-off-by: NBenny Halevy <bhalevy@panasas.com>
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由 Ricardo Labiaga 提交于
Reading and storing the RPC direction is a three step process. 1. xs_tcp_read_calldir() reads the RPC direction, but it will not store it in the XDR buffer since the 'struct rpc_rqst' is not yet available. 2. The 'struct rpc_rqst' is obtained during the TCP_RCV_COPY_DATA state. This state need not necessarily be preceeded by the TCP_RCV_READ_CALLDIR. For example, we may be reading a continuation packet to a large reply. Therefore, we can't simply obtain the 'struct rpc_rqst' during the TCP_RCV_READ_CALLDIR state and assume it's available during TCP_RCV_COPY_DATA. This patch adds a new TCP_RCV_READ_CALLDIR flag to indicate the need to read the RPC direction. It then uses TCP_RCV_COPY_CALLDIR to indicate the RPC direction needs to be saved after the 'struct rpc_rqst' has been allocated. 3. The 'struct rpc_rqst' is obtained by the xs_tcp_read_data() helper functions. xs_tcp_read_common() then saves the RPC direction in the XDR buffer if TCP_RCV_COPY_CALLDIR is set. This will happen when we're reading the data immediately after the direction was read. xs_tcp_read_common() then clears this flag. [was nfs41: Skip past the RPC call direction] Signed-off-by: NRicardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41: sunrpc: Add RPC direction back into the XDR buffer] Signed-off-by: NRicardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41: sunrpc: Don't skip past the RPC call direction] Signed-off-by: NRicardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com>
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由 Ricardo Labiaga 提交于
NFSv4.1 callbacks can arrive over an existing connection. This patch adds the logic to read the RPC call direction (call or reply). It does this by updating the state machine to look for the call direction invoking xs_tcp_read_calldir(...) after reading the XID. [nfs41: Keep track of RPC call/reply direction with a flag] As per 11/14/08 review of RFC 53/85. Add a new flag to track whether the incoming message is an RPC call or an RPC reply. TCP_RPC_REPLY is set in the 'struct sock_xprt' tcp_flags in xs_tcp_read_calldir() if the message is an RPC reply sent on the forechannel. It is cleared if the message is an RPC request sent on the back channel. Signed-off-by: NRicardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com>
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由 Benny Halevy 提交于
Unlike minorversion0, in nfsv4.1 the open and lock seqids need not be incremented by the client and should always be set to zero. This is implemented using a new nfs_rpc_ops methods - increment_open_seqid and increment_lock_seqid Signed-off-by: NRahul Iyer <iyer@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: NAndy Adamson <andros@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Andy Adamson 提交于
Stops an infinite loop of EXCHANGE_ID. Signed-off-by: NAndy Adamson <andros@netapp.com> [fixed checkpatch warnings] Signed-off-by: NBenny Halevy <bhalevy@panasas.com>
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由 Benny Halevy 提交于
This creates the nfsv4.1 session on mount. Signed-off-by: NBenny Halevy <bhalevy@panasas.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Andy Adamson 提交于
Unlike SETCLIENTID, EXCHANGE_ID requires a machine credential. Do not search for credentials other than the machine credential. Signed-off-by: NAndy Adamson <andros@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Andy Adamson 提交于
EXCHANGE_ID has different credential requirements than SETCLIENTID. Prepare for a separate credential function. Signed-off-by: NAndy Adamson <andros@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Andy Adamson 提交于
nfsv4.1 clientid is established via EXCHANGE_ID rather than SETCLIENTID{,_CONFIRM} This is implemented using a new establish_clid method in nfs4_state_recovery_ops. nfs41: establish clientid via exchange id only if cred != NULL >From 2.6.26 reclaimer() uses machine cred for setting up the client id therefore it is never expected to be NULL. Signed-off-by: NRahul Iyer <iyer@netapp.com> [removed dprintk] Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41: lease renewal] [revamped patch for new nfs4_state_manager design] Signed-off-by: NBenny Halevy <bhalevy@panasas.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Andy Adamson 提交于
Use the machine cred for sending SEQUENCE to renew the client's lease. [revamp patch for new state management design starting 2.6.29] [nfs41: support minorversion 1 for nfs4_check_lease] Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41: get cred in exchange_id when cred arg is NULL] Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41: use cl_machined_cred instead of cl_ex_cred] Since EXCHANGE_ID insists on using the machine credential, cl_ex_cred is not needed. nfs4_proc_exchange_id() is only called if the machine credential is available. Remove the credential logic from nfs4_proc_exchange_id. Signed-off-by: NAndy Adamson <andros@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Benny Halevy 提交于
[moved nfs4_get_renew_cred related changes to "nfs41: introduce get_state_renewal_cred"] Signed-off-by: NBenny Halevy <bhalevy@panasas.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Benny Halevy 提交于
Send a NFSv4.1 SEQUENCE op rather than RENEW that was deprecated in minorversion 1. Use the nfs_client minorversion to select reboot_recover/ network_partition_recovery/state_renewal ops. Note: we use reclaimer to create the nfs41 session before there are any cl_superblocks for the nfs_client. Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: NAndy Adamson <andros@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [revamped patch for new nfs4_state_manager design] Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41: obliterate nfs4_state_recovery_ops.renew_lease method] moved to nfs4_state_maintenance_ops [also undid per-minorversion nfs4_state_recovery_ops here] Signed-off-by: NBenny Halevy <bhalevy@panasas.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Andy Adamson 提交于
Define a new session reset state which is set upon a sequence operation error in both the sync and async error handlers. Place all new requests and all but the last outstanding rpc on the slot_tbl_waitq. Spawn the recovery thread when the last slot is free. Call nfs4_proc_destroy_session, reinitialize the session, call nfs4_proc_create_session, clear the session reset state, and wake up the next task on the slot_tbl_waitq. Return the nfs4_proc_destroy_session status to the session reclaimer and check for NFS4ERR_BADSESSION and NFS4ERR_DEADSESSION. Other destroy session errors should be handled in nfs4_proc_destroy_session where the call can be retried with adjusted arguments. Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> nfs41: make nfs4_wait_bit_killable public] nfs4_wait_bit_killable to be used by NFSv4.1 session recover logic. Signed-off-by: NRahul Iyer <iyer@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41: have create_session work on nfs_client] Signed-off-by: NAndy Adamson <andros@netapp.com> [nfs41: trigger the state manager for session reset] Replace the session reset state with the NFS4CLNT_SESSION_SETUP cl_state. Place all rpc tasks to sleep on the slot table waitqueue until the slot table is drained, then schedule state recovery and wait for it to complete. Signed-off-by: NAndy Adamson <andros@netapp.com> [nfs41: remove nfs41_session_recovery [ch] Replaced by using the nfs4_state_manager. Signed-off-by: NAndy Adamson <andros@netapp.com> [nfs41: nfs4_wait_bit_killable only used locally] [nfs41: keep nfs4_wait_bit_killable static] [nfs41: keep const nfs_server in nfs4_handle_exception] [nfs41: remove session parameter from nfs4_find_slot] Signed-off-by: Andy Adamson <andros@netapp.com Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41: resset the session from nfs41_setup_sequence] Signed-off-by: NAndy Adamson <andros@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Andy Adamson 提交于
Remove checking for any errors that the SEQUENCE operation does not return. -NFS4ERR_STALE_CLIENTID, NFS4ERR_EXPIRED, NFS4ERR_CB_PATH_DOWN, NFS4ERR_BACK_CHAN_BUSY, NFS4ERR_OP_NOT_IN_SESSION. SEQUENCE operation error recovery is very primative, we only reset the session. Remove checking for any errors that are returned by the SEQUENCE operation, but that resetting the session won't address. NFS4ERR_RETRY_UNCACHED_REP, NFS4ERR_SEQUENCE_POS,NFS4ERR_TOO_MANY_OPS. Add error checking for missing SEQUENCE errors that a session reset will address. NFS4ERR_BAD_HIGH_SLOT, NFS4ERR_DEADSESSION, NFS4ERR_SEQ_FALSE_RETRY. A reset of the session is currently our only response to a SEQUENCE operation error. Don't reset the session on errors where a new session won't help. Don't reset the session on errors where a new session won't help. [nfs41: nfs4_async_handle_error update error checking] Signed-off-by: NAndy Adamson <andros@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41: trigger the state manager for session reset] Replace session state bit with nfs_client state bit. Set the NFS4CLNT_SESSION_SETUP bit upon a session related error in the sync/async error handlers. [nfs41: _nfs4_async_handle_error fix session reset error list] Sequence operation errors that session reset could help. NFS4ERR_BADSESSION NFS4ERR_BADSLOT NFS4ERR_BAD_HIGH_SLOT NFS4ERR_DEADSESSION NFS4ERR_CONN_NOT_BOUND_TO_SESSION NFS4ERR_SEQ_FALSE_RETRY NFS4ERR_SEQ_MISORDERED Sequence operation errors that a session reset would not help NFS4ERR_BADXDR NFS4ERR_DELAY NFS4ERR_REP_TOO_BIG NFS4ERR_REP_TOO_BIG_TO_CACHE NFS4ERR_REQ_TOO_BIG NFS4ERR_RETRY_UNCACHED_REP NFS4ERR_SEQUENCE_POS NFS4ERR_TOO_MANY_OPS Signed-off-by: NAndy Adamson <andros@netapp.com> [nfs41 nfs4_handle_exception fix session reset error list] Signed-off-by: NAndy Adamson <andros@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [moved nfs41_sequece_call_done code to nfs41: sequence operation] Signed-off-by: NAndy Adamson <andros@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Andy Adamson 提交于
[nfs41: change nfs4_restart_rpc argument] [nfs41: check for session not minorversion] [nfs41: trigger the state manager for session reset] Signed-off-by: NAndy Adamson <andros@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [always define nfs4_restart_rpc] Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Andy Adamson 提交于
Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Andy Adamson 提交于
Move the code to reset a session from the session_reclaimer to the nfs4_state_manager. Destroy the session, and create a new one. Treat NFS4ERR_BADSESSION and NFS4ERR_DEADSESSION as a successful nfs4_proc_destroy_session. Signal nfs4_proc_create_session that this is a session reset so that the session slot table is re-used. If the clientid is stale, set both NFS4CLNT_LEASE_EXPIRED and NFS4CLNT_SESSION_SETUP bits and retry. Use a switch statement in nfs4_session_recovery_handle_error for future patche which will add handling for other errors. Signed-off-by: NAndy Adamson <andros@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41: session reset in nfs4_recovery_handle_error] Signed-off-by: NAndy Adamson <andros@netapp.com> [nfs41: reset session on nfs4_do_reclaim session reset error] If nfs4_do_reclaim gets a session reset error, nfs4_recovery_handle_error will set the NFS4CLNT_SESSION_SETUP bit, and the state manager should continue processing to reset the session. Signed-off-by: NAndy Adamson <andros@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [move nfs4_proc_destroy_session declaration here] Signed-off-by: NBenny Halevy <bhalevy@panasas.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Andy Adamson 提交于
At mount, nfs_alloc_client sets the cl_state NFS4CLNT_LEASE_EXPIRED bit and nfs4_alloc_session sets the NFS4CLNT_SESSION_SETUP bit, so both bits are set when nfs4_lookup_root calls nfs4_recover_expired_lease which schedules the nfs4_state_manager and waits for it to complete. Place the session setup after the clientid establishment in nfs4_state_manager so that the session is setup right after the clientid has been established without rescheduling the state manager. Unlike nfsv4.0, the nfs_client struct is not ready to use until the session has been established. Postpone marking the nfs_client struct to NFS_CS_READY until after a successful CREATE_SESSION call so that other threads cannot use the client until the session is established. If the EXCHANGE_ID call fails and the session has not been setup (the NFS4CLNT_SESSION_SETUP bit is set), mark the client with the error and return. If the session setup CREATE_SESSION call fails with NFS4ERR_STALE_CLIENTID which could occur due to server reboot or network partition inbetween the EXCHANGE_ID and CREATE_SESSION call, reset the NFS4CLNT_LEASE_EXPIRED and NFS4CLNT_SESSION_SETUP bits and try again. If the CREATE_SESSION call fails with other errors, mark the client with the error and return. Signed-off-by: NAndy Adamson <andros@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41: NFS_CS_SESSION_SETUP cl_cons_state for back channel setup] On session setup, the CREATE_SESSION reply races with the server back channel probe which needs to succeed to setup the back channel. Set a new cl_cons_state NFS_CS_SESSION_SETUP just prior to the CREATE_SESSION call and add it as a valid state to nfs_find_client so that the client back channel can find the nfs_client struct and won't drop the server backchannel probe. Use a new cl_cons_state so that NFSv4.0 back channel behaviour which only sets NFS_CS_READY is unchanged. Adjust waiting on the nfs_client_active_wq accordingly. Signed-off-by: NAndy Adamson <andros@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41: rename NFS_CS_SESSION_SETUP to NFS_CS_SESSION_INITING] Signed-off-by: NAndy Adamson <andros@netapp.com> [nfs41: set NFS_CL_SESSION_INITING in alloc_session] Signed-off-by: NAndy Adamson <andros@netapp.com> [nfs41: move session setup into a function] Signed-off-by: NAndy Adamson <andros@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [moved nfs4_proc_create_session declaration here] Signed-off-by: NBenny Halevy <bhalevy@panasas.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Andy Adamson 提交于
Separated from nfs41: schedule async session reset Do not kfree the session slot table upon session reset, just re-initialize it. Add a boolean to nfs4_proc_create_session to inidicate if this is a session reset or a session initialization. Signed-off-by: NBenny Halevy <bhalevy@panasas.com> Signed-off-by: NAndy Adamson <andros@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Andy Adamson 提交于
Implement the sequence operation conforming to http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion1-26 Check returned sessionid, slotid and slot sequenceid in decode_sequence. If the server returns different values for sessionID, slotID or slot sequence number than what was sent, the server is looney tunes. Pass the sequence operation status to nfs41_sequence_done in order to determine when to increment the slot sequence ID. Free slot is separated from sequence done. Signed-off-by: NRahul Iyer <iyer@netapp.com> Signed-off-by: NRicardo Labiaga <ricardo.labiaga@netapp.com> Signed-off-by: Andy Adamson<andros@umich.edu> [nfs41: sequence res use slotid] Signed-off-by: NAndy Adamson <andros@netapp.com> [nfs41: deref slot table in decode_sequence only for minorversion!=0] Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] [nfs41: remove SEQ4_STATUS_USE_TK_STATUS] [nfs41: return ESERVERFAULT in decode_sequence] [no sr_session, no sr_flags] Signed-off-by: NAndy Adamson <andros@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41: use nfs4_call_sync_sequence to renew session lease] Signed-off-by: NAndy Adamson <andros@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41: remove nfs4_call_sync_sequence forward definition] Signed-off-by: NAndy Adamson <andros@netapp.com> [nfs41: use struct nfs_client for nfs41_proc_async_sequence] Signed-off-by: NAndy Adamson <andros@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41: pass *session in seq_args and seq_res] Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41 nfs41_sequence_call_done update error checking] [nfs41 nfs41_sequence_done update error checking] Signed-off-by: NAndy Adamson <andros@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41: remove switch on error from nfs41_sequence_call_done] Signed-off-by: NAndy Adamson <andros@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Andy Adamson 提交于
The session is per struct nfs_client, not per nfs_server. Allow the handler to be called with no nfs_server which simplifies the nfs4_proc_async_sequence session renewal call and will let it be used by pnfs file layout data servers. Signed-off-by: NAndy Adamson <andros@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Andy Adamson 提交于
Implement the destroy_session operation conforming to http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion1-26Signed-off-by: NRicardo Labiaga <ricardo.labiaga@netapp.com> Signed-off-by: Andy Adamson<andros@umich.edu> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41: remove extraneous rpc_clnt pointer] Signed-off-by: NAndy Adamson <andros@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41; NFS_CS_READY required for DESTROY_SESSION] Signed-off-by: NAndy Adamson <andros@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [nfs41: pass *session in seq_args and seq_res] Signed-off-by: NBenny Halevy <bhalevy@panasas.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com> [nfs41: fix encode_destroy_session's xdr Xcoding pointer type] Signed-off-by: NBenny Halevy <bhalevy@panasas.com>
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由 Andy Adamson 提交于
Set the mount points rsize and wsize to the negotiated session fore channel maximum response and requeset size. These values will be bound checked in nfs_server_set_fsinfo. Signed-off-by: NAndy Adamson <andros@netapp.com> Signed-off-by: NBenny Halevy <bhalevy@panasas.com> [move nfs4_session_set_rwsize into CONFIG_NFS_V4] Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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由 Andy Adamson 提交于
Invalidate the session if the server returns invalid fore or back channel attributes. Use a KERN_WARNING to report the fatal session estabishment error. Signed-off-by: NAndy Adamson <andros@netapp.com> [refactor nfs4_verify_channel_attrs] Signed-off-by: NBenny Halevy <bhalevy@panasas.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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