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fs/nfs/nfs4state.c
58.3 KB
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/* * fs/nfs/nfs4state.c * * Client-side XDR for NFSv4. * * Copyright (c) 2002 The Regents of the University of Michigan. * All rights reserved. * * Kendrick Smith <kmsmith@umich.edu> * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * Implementation of the NFSv4 state model. For the time being, * this is minimal, but will be made much more complex in a * subsequent patch. */ |
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#include <linux/kernel.h> |
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#include <linux/slab.h> |
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#include <linux/fs.h> |
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#include <linux/nfs_fs.h> #include <linux/nfs_idmap.h> |
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#include <linux/kthread.h> #include <linux/module.h> |
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#include <linux/random.h> |
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#include <linux/ratelimit.h> |
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#include <linux/workqueue.h> #include <linux/bitops.h> |
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#include <linux/jiffies.h> |
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|
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#include <linux/sunrpc/clnt.h> |
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#include "nfs4_fs.h" |
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#include "callback.h" #include "delegation.h" |
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#include "internal.h" |
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#include "pnfs.h" |
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#include "netns.h" |
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|
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#define NFSDBG_FACILITY NFSDBG_STATE |
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#define OPENOWNER_POOL_SIZE 8 |
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const nfs4_stateid zero_stateid; |
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static DEFINE_MUTEX(nfs_clid_init_mutex); |
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static LIST_HEAD(nfs4_clientid_list); |
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int nfs4_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
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{ |
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struct nfs4_setclientid_res clid = { .clientid = clp->cl_clientid, .confirm = clp->cl_confirm, }; |
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unsigned short port; int status; |
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struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
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|
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if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) goto do_confirm; |
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port = nn->nfs_callback_tcpport; |
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if (clp->cl_addr.ss_family == AF_INET6) |
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port = nn->nfs_callback_tcpport6; |
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|
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status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); if (status != 0) goto out; |
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clp->cl_clientid = clid.clientid; clp->cl_confirm = clid.confirm; set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); do_confirm: |
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status = nfs4_proc_setclientid_confirm(clp, &clid, cred); if (status != 0) goto out; |
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clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
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nfs4_schedule_state_renewal(clp); out: |
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return status; } |
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/** * nfs40_discover_server_trunking - Detect server IP address trunking (mv0) * * @clp: nfs_client under test * @result: OUT: found nfs_client, or clp * @cred: credential to use for trunking test * * Returns zero, a negative errno, or a negative NFS4ERR status. * If zero is returned, an nfs_client pointer is planted in * "result". * * Note: The returned client may not yet be marked ready. */ int nfs40_discover_server_trunking(struct nfs_client *clp, struct nfs_client **result, struct rpc_cred *cred) { struct nfs4_setclientid_res clid = { .clientid = clp->cl_clientid, .confirm = clp->cl_confirm, }; |
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struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
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unsigned short port; int status; |
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port = nn->nfs_callback_tcpport; |
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if (clp->cl_addr.ss_family == AF_INET6) |
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port = nn->nfs_callback_tcpport6; |
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status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); if (status != 0) goto out; clp->cl_clientid = clid.clientid; clp->cl_confirm = clid.confirm; status = nfs40_walk_client_list(clp, result, cred); switch (status) { case -NFS4ERR_STALE_CLIENTID: set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); case 0: /* Sustain the lease, even if it's empty. If the clientid4 * goes stale it's of no use for trunking discovery. */ nfs4_schedule_state_renewal(*result); break; } out: return status; } |
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struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp) |
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{ struct rpc_cred *cred = NULL; |
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if (clp->cl_machine_cred != NULL) cred = get_rpccred(clp->cl_machine_cred); |
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return cred; } static void nfs4_clear_machine_cred(struct nfs_client *clp) { struct rpc_cred *cred; spin_lock(&clp->cl_lock); cred = clp->cl_machine_cred; clp->cl_machine_cred = NULL; spin_unlock(&clp->cl_lock); if (cred != NULL) put_rpccred(cred); } |
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static struct rpc_cred * nfs4_get_renew_cred_server_locked(struct nfs_server *server) |
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{ |
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struct rpc_cred *cred = NULL; |
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struct nfs4_state_owner *sp; |
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struct rb_node *pos; |
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|
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for (pos = rb_first(&server->state_owners); pos != NULL; pos = rb_next(pos)) { sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); |
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if (list_empty(&sp->so_states)) continue; cred = get_rpccred(sp->so_cred); break; } return cred; } |
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/** * nfs4_get_renew_cred_locked - Acquire credential for a renew operation * @clp: client state handle * * Returns an rpc_cred with reference count bumped, or NULL. * Caller must hold clp->cl_lock. */ struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp) { struct rpc_cred *cred = NULL; struct nfs_server *server; |
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/* Use machine credentials if available */ cred = nfs4_get_machine_cred_locked(clp); if (cred != NULL) goto out; |
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rcu_read_lock(); list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { cred = nfs4_get_renew_cred_server_locked(server); if (cred != NULL) break; } rcu_read_unlock(); |
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out: |
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return cred; } |
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#if defined(CONFIG_NFS_V4_1) |
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static int nfs41_setup_state_renewal(struct nfs_client *clp) { int status; struct nfs_fsinfo fsinfo; |
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if (!test_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state)) { nfs4_schedule_state_renewal(clp); return 0; } |
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status = nfs4_proc_get_lease_time(clp, &fsinfo); if (status == 0) { /* Update lease time and schedule renewal */ spin_lock(&clp->cl_lock); clp->cl_lease_time = fsinfo.lease_time * HZ; clp->cl_last_renewal = jiffies; spin_unlock(&clp->cl_lock); nfs4_schedule_state_renewal(clp); } return status; } |
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/* * Back channel returns NFS4ERR_DELAY for new requests when * NFS4_SESSION_DRAINING is set so there is no work to be done when draining * is ended. */ |
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static void nfs4_end_drain_session(struct nfs_client *clp) |
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{ |
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struct nfs4_session *ses = clp->cl_session; |
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struct nfs4_slot_table *tbl; |
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int max_slots; |
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if (ses == NULL) return; |
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tbl = &ses->fc_slot_table; |
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if (test_and_clear_bit(NFS4_SESSION_DRAINING, &ses->session_state)) { |
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spin_lock(&tbl->slot_tbl_lock); max_slots = tbl->max_slots; |
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while (max_slots--) { |
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if (rpc_wake_up_first(&tbl->slot_tbl_waitq, nfs4_set_task_privileged, NULL) == NULL) |
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break; |
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} |
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spin_unlock(&tbl->slot_tbl_lock); |
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} |
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} |
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static int nfs4_wait_on_slot_tbl(struct nfs4_slot_table *tbl) |
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{ |
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spin_lock(&tbl->slot_tbl_lock); |
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if (tbl->highest_used_slotid != NFS4_NO_SLOT) { |
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INIT_COMPLETION(tbl->complete); |
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spin_unlock(&tbl->slot_tbl_lock); |
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return wait_for_completion_interruptible(&tbl->complete); |
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} spin_unlock(&tbl->slot_tbl_lock); return 0; } |
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static int nfs4_begin_drain_session(struct nfs_client *clp) { struct nfs4_session *ses = clp->cl_session; int ret = 0; set_bit(NFS4_SESSION_DRAINING, &ses->session_state); /* back channel */ ret = nfs4_wait_on_slot_tbl(&ses->bc_slot_table); if (ret) return ret; /* fore channel */ return nfs4_wait_on_slot_tbl(&ses->fc_slot_table); } |
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static void nfs41_finish_session_reset(struct nfs_client *clp) { clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); /* create_session negotiated new slot table */ clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); nfs41_setup_state_renewal(clp); } |
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int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) { int status; |
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if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) goto do_confirm; |
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nfs4_begin_drain_session(clp); |
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status = nfs4_proc_exchange_id(clp, cred); |
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if (status != 0) goto out; |
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set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); do_confirm: |
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status = nfs4_proc_create_session(clp, cred); |
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if (status != 0) goto out; |
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nfs41_finish_session_reset(clp); |
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nfs_mark_client_ready(clp, NFS_CS_READY); out: |
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return status; } |
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/** * nfs41_discover_server_trunking - Detect server IP address trunking (mv1) * * @clp: nfs_client under test * @result: OUT: found nfs_client, or clp * @cred: credential to use for trunking test * * Returns NFS4_OK, a negative errno, or a negative NFS4ERR status. * If NFS4_OK is returned, an nfs_client pointer is planted in * "result". * * Note: The returned client may not yet be marked ready. */ int nfs41_discover_server_trunking(struct nfs_client *clp, struct nfs_client **result, struct rpc_cred *cred) { int status; status = nfs4_proc_exchange_id(clp, cred); if (status != NFS4_OK) return status; |
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set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
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return nfs41_walk_client_list(clp, result, cred); } |
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struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp) { struct rpc_cred *cred; spin_lock(&clp->cl_lock); cred = nfs4_get_machine_cred_locked(clp); spin_unlock(&clp->cl_lock); return cred; } #endif /* CONFIG_NFS_V4_1 */ |
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static struct rpc_cred * nfs4_get_setclientid_cred_server(struct nfs_server *server) |
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{ |
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struct nfs_client *clp = server->nfs_client; struct rpc_cred *cred = NULL; |
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struct nfs4_state_owner *sp; |
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struct rb_node *pos; |
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spin_lock(&clp->cl_lock); pos = rb_first(&server->state_owners); if (pos != NULL) { sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); cred = get_rpccred(sp->so_cred); } spin_unlock(&clp->cl_lock); return cred; } /** * nfs4_get_setclientid_cred - Acquire credential for a setclientid operation * @clp: client state handle * * Returns an rpc_cred with reference count bumped, or NULL. */ struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp) { struct nfs_server *server; |
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struct rpc_cred *cred; |
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|
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spin_lock(&clp->cl_lock); cred = nfs4_get_machine_cred_locked(clp); |
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spin_unlock(&clp->cl_lock); |
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if (cred != NULL) goto out; |
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rcu_read_lock(); list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { cred = nfs4_get_setclientid_cred_server(server); if (cred != NULL) break; |
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} |
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rcu_read_unlock(); |
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out: return cred; |
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} |
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static struct nfs4_state_owner * |
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nfs4_find_state_owner_locked(struct nfs_server *server, struct rpc_cred *cred) |
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{ |
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struct rb_node **p = &server->state_owners.rb_node, |
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*parent = NULL; |
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struct nfs4_state_owner *sp; |
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|
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while (*p != NULL) { parent = *p; |
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sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
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if (cred < sp->so_cred) p = &parent->rb_left; else if (cred > sp->so_cred) p = &parent->rb_right; else { |
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if (!list_empty(&sp->so_lru)) list_del_init(&sp->so_lru); |
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atomic_inc(&sp->so_count); |
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return sp; |
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} |
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} |
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return NULL; |
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} |
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static struct nfs4_state_owner * |
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nfs4_insert_state_owner_locked(struct nfs4_state_owner *new) |
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{ |
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struct nfs_server *server = new->so_server; struct rb_node **p = &server->state_owners.rb_node, |
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*parent = NULL; struct nfs4_state_owner *sp; |
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int err; |
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while (*p != NULL) { parent = *p; |
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sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
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if (new->so_cred < sp->so_cred) p = &parent->rb_left; else if (new->so_cred > sp->so_cred) p = &parent->rb_right; else { |
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if (!list_empty(&sp->so_lru)) list_del_init(&sp->so_lru); |
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atomic_inc(&sp->so_count); return sp; } } |
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err = ida_get_new(&server->openowner_id, &new->so_seqid.owner_id); |
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438 439 |
if (err) return ERR_PTR(err); |
24d292b89 NFS: Move cl_stat... |
440 441 |
rb_link_node(&new->so_server_node, parent, p); rb_insert_color(&new->so_server_node, &server->state_owners); |
9f958ab88 NFSv4: Reduce the... |
442 443 444 445 |
return new; } static void |
24d292b89 NFS: Move cl_stat... |
446 |
nfs4_remove_state_owner_locked(struct nfs4_state_owner *sp) |
9f958ab88 NFSv4: Reduce the... |
447 |
{ |
24d292b89 NFS: Move cl_stat... |
448 449 450 451 |
struct nfs_server *server = sp->so_server; if (!RB_EMPTY_NODE(&sp->so_server_node)) rb_erase(&sp->so_server_node, &server->state_owners); |
48c22eb21 NFS: Move struct ... |
452 |
ida_remove(&server->openowner_id, sp->so_seqid.owner_id); |
9f958ab88 NFSv4: Reduce the... |
453 |
} |
7ba127ab9 NFSv4: Move conte... |
454 455 456 |
static void nfs4_init_seqid_counter(struct nfs_seqid_counter *sc) { |
95b72eb0b NFSv4: Ensure we ... |
457 |
sc->create_time = ktime_get(); |
7ba127ab9 NFSv4: Move conte... |
458 459 460 461 462 463 464 465 466 467 468 469 |
sc->flags = 0; sc->counter = 0; spin_lock_init(&sc->lock); INIT_LIST_HEAD(&sc->list); rpc_init_wait_queue(&sc->wait, "Seqid_waitqueue"); } static void nfs4_destroy_seqid_counter(struct nfs_seqid_counter *sc) { rpc_destroy_wait_queue(&sc->wait); } |
1da177e4c Linux-2.6.12-rc2 |
470 471 472 473 474 475 |
/* * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to * create a new state_owner. * */ static struct nfs4_state_owner * |
d1e284d50 NFSv4: Clean up n... |
476 477 478 |
nfs4_alloc_state_owner(struct nfs_server *server, struct rpc_cred *cred, gfp_t gfp_flags) |
1da177e4c Linux-2.6.12-rc2 |
479 480 |
{ struct nfs4_state_owner *sp; |
d1e284d50 NFSv4: Clean up n... |
481 |
sp = kzalloc(sizeof(*sp), gfp_flags); |
1da177e4c Linux-2.6.12-rc2 |
482 483 |
if (!sp) return NULL; |
d1e284d50 NFSv4: Clean up n... |
484 485 |
sp->so_server = server; sp->so_cred = get_rpccred(cred); |
ec0734282 NFSv4: Fix up loc... |
486 |
spin_lock_init(&sp->so_lock); |
1da177e4c Linux-2.6.12-rc2 |
487 |
INIT_LIST_HEAD(&sp->so_states); |
7ba127ab9 NFSv4: Move conte... |
488 |
nfs4_init_seqid_counter(&sp->so_seqid); |
1da177e4c Linux-2.6.12-rc2 |
489 |
atomic_set(&sp->so_count, 1); |
0aaaf5c42 NFS: Cache state ... |
490 |
INIT_LIST_HEAD(&sp->so_lru); |
1da177e4c Linux-2.6.12-rc2 |
491 492 |
return sp; } |
1d2e88e73 nfs: make nfs4_dr... |
493 |
static void |
1da177e4c Linux-2.6.12-rc2 |
494 495 |
nfs4_drop_state_owner(struct nfs4_state_owner *sp) { |
c77365c96 NFSv4: Ensure tha... |
496 497 498 |
struct rb_node *rb_node = &sp->so_server_node; if (!RB_EMPTY_NODE(rb_node)) { |
24d292b89 NFS: Move cl_stat... |
499 500 |
struct nfs_server *server = sp->so_server; struct nfs_client *clp = server->nfs_client; |
9f958ab88 NFSv4: Reduce the... |
501 502 |
spin_lock(&clp->cl_lock); |
c77365c96 NFSv4: Ensure tha... |
503 504 505 506 |
if (!RB_EMPTY_NODE(rb_node)) { rb_erase(rb_node, &server->state_owners); RB_CLEAR_NODE(rb_node); } |
9f958ab88 NFSv4: Reduce the... |
507 508 |
spin_unlock(&clp->cl_lock); } |
1da177e4c Linux-2.6.12-rc2 |
509 |
} |
0aaaf5c42 NFS: Cache state ... |
510 511 |
static void nfs4_free_state_owner(struct nfs4_state_owner *sp) { |
7ba127ab9 NFSv4: Move conte... |
512 |
nfs4_destroy_seqid_counter(&sp->so_seqid); |
0aaaf5c42 NFS: Cache state ... |
513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 |
put_rpccred(sp->so_cred); kfree(sp); } static void nfs4_gc_state_owners(struct nfs_server *server) { struct nfs_client *clp = server->nfs_client; struct nfs4_state_owner *sp, *tmp; unsigned long time_min, time_max; LIST_HEAD(doomed); spin_lock(&clp->cl_lock); time_max = jiffies; time_min = (long)time_max - (long)clp->cl_lease_time; list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { /* NB: LRU is sorted so that oldest is at the head */ if (time_in_range(sp->so_expires, time_min, time_max)) break; list_move(&sp->so_lru, &doomed); nfs4_remove_state_owner_locked(sp); } spin_unlock(&clp->cl_lock); list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { list_del(&sp->so_lru); nfs4_free_state_owner(sp); } } |
24d292b89 NFS: Move cl_stat... |
541 542 543 544 545 546 547 548 |
/** * nfs4_get_state_owner - Look up a state owner given a credential * @server: nfs_server to search * @cred: RPC credential to match * * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL. */ struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, |
d1e284d50 NFSv4: Clean up n... |
549 550 |
struct rpc_cred *cred, gfp_t gfp_flags) |
1da177e4c Linux-2.6.12-rc2 |
551 |
{ |
7539bbab8 NFS: Rename nfs_s... |
552 |
struct nfs_client *clp = server->nfs_client; |
1da177e4c Linux-2.6.12-rc2 |
553 |
struct nfs4_state_owner *sp, *new; |
1da177e4c Linux-2.6.12-rc2 |
554 |
spin_lock(&clp->cl_lock); |
24d292b89 NFS: Move cl_stat... |
555 |
sp = nfs4_find_state_owner_locked(server, cred); |
1da177e4c Linux-2.6.12-rc2 |
556 |
spin_unlock(&clp->cl_lock); |
1da177e4c Linux-2.6.12-rc2 |
557 |
if (sp != NULL) |
0aaaf5c42 NFS: Cache state ... |
558 |
goto out; |
d1e284d50 NFSv4: Clean up n... |
559 |
new = nfs4_alloc_state_owner(server, cred, gfp_flags); |
9f958ab88 NFSv4: Reduce the... |
560 |
if (new == NULL) |
0aaaf5c42 NFS: Cache state ... |
561 |
goto out; |
9157c31dd NFSv4: Replace st... |
562 563 564 565 566 567 568 |
do { if (ida_pre_get(&server->openowner_id, gfp_flags) == 0) break; spin_lock(&clp->cl_lock); sp = nfs4_insert_state_owner_locked(new); spin_unlock(&clp->cl_lock); } while (sp == ERR_PTR(-EAGAIN)); |
d1e284d50 NFSv4: Clean up n... |
569 570 |
if (sp != new) nfs4_free_state_owner(new); |
0aaaf5c42 NFS: Cache state ... |
571 572 |
out: nfs4_gc_state_owners(server); |
9f958ab88 NFSv4: Reduce the... |
573 |
return sp; |
1da177e4c Linux-2.6.12-rc2 |
574 |
} |
24d292b89 NFS: Move cl_stat... |
575 576 577 |
/** * nfs4_put_state_owner - Release a nfs4_state_owner * @sp: state owner data to release |
7bf97bc27 NFSv4: Keep dropp... |
578 579 580 581 582 583 584 585 |
* * Note that we keep released state owners on an LRU * list. * This caches valid state owners so that they can be * reused, to avoid the OPEN_CONFIRM on minor version 0. * It also pins the uniquifier of dropped state owners for * a while, to ensure that those state owner names are * never reused. |
24d292b89 NFS: Move cl_stat... |
586 |
*/ |
1da177e4c Linux-2.6.12-rc2 |
587 588 |
void nfs4_put_state_owner(struct nfs4_state_owner *sp) { |
0aaaf5c42 NFS: Cache state ... |
589 590 |
struct nfs_server *server = sp->so_server; struct nfs_client *clp = server->nfs_client; |
1da177e4c Linux-2.6.12-rc2 |
591 592 593 |
if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) return; |
0aaaf5c42 NFS: Cache state ... |
594 |
|
7bf97bc27 NFSv4: Keep dropp... |
595 596 597 |
sp->so_expires = jiffies; list_add_tail(&sp->so_lru, &server->state_owners_lru); spin_unlock(&clp->cl_lock); |
0aaaf5c42 NFS: Cache state ... |
598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 |
} /** * nfs4_purge_state_owners - Release all cached state owners * @server: nfs_server with cached state owners to release * * Called at umount time. Remaining state owners will be on * the LRU with ref count of zero. */ void nfs4_purge_state_owners(struct nfs_server *server) { struct nfs_client *clp = server->nfs_client; struct nfs4_state_owner *sp, *tmp; LIST_HEAD(doomed); spin_lock(&clp->cl_lock); list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { list_move(&sp->so_lru, &doomed); nfs4_remove_state_owner_locked(sp); } |
1da177e4c Linux-2.6.12-rc2 |
618 |
spin_unlock(&clp->cl_lock); |
0aaaf5c42 NFS: Cache state ... |
619 620 621 622 623 |
list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { list_del(&sp->so_lru); nfs4_free_state_owner(sp); } |
1da177e4c Linux-2.6.12-rc2 |
624 625 626 627 628 629 |
} static struct nfs4_state * nfs4_alloc_open_state(void) { struct nfs4_state *state; |
8535b2be5 NFSv4: Don't use ... |
630 |
state = kzalloc(sizeof(*state), GFP_NOFS); |
1da177e4c Linux-2.6.12-rc2 |
631 632 |
if (!state) return NULL; |
1da177e4c Linux-2.6.12-rc2 |
633 634 |
atomic_set(&state->count, 1); INIT_LIST_HEAD(&state->lock_states); |
8d0a8a9d0 [PATCH] NFSv4: Cl... |
635 |
spin_lock_init(&state->state_lock); |
8bda4e4c9 NFSv4: Fix up sta... |
636 |
seqlock_init(&state->seqlock); |
1da177e4c Linux-2.6.12-rc2 |
637 638 |
return state; } |
4cecb76ff NFSv4: Fix a race... |
639 |
void |
dc0b027df NFSv4: Convert th... |
640 |
nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
4cecb76ff NFSv4: Fix a race... |
641 |
{ |
dc0b027df NFSv4: Convert th... |
642 |
if (state->state == fmode) |
4cecb76ff NFSv4: Fix a race... |
643 644 |
return; /* NB! List reordering - see the reclaim code for why. */ |
dc0b027df NFSv4: Convert th... |
645 646 |
if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { if (fmode & FMODE_WRITE) |
4cecb76ff NFSv4: Fix a race... |
647 648 649 650 |
list_move(&state->open_states, &state->owner->so_states); else list_move_tail(&state->open_states, &state->owner->so_states); } |
dc0b027df NFSv4: Convert th... |
651 |
state->state = fmode; |
4cecb76ff NFSv4: Fix a race... |
652 |
} |
1da177e4c Linux-2.6.12-rc2 |
653 |
static struct nfs4_state * |
1da177e4c Linux-2.6.12-rc2 |
654 655 656 657 658 659 |
__nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) { struct nfs_inode *nfsi = NFS_I(inode); struct nfs4_state *state; list_for_each_entry(state, &nfsi->open_states, inode_states) { |
1c816efa2 NFSv4: Fix a bug ... |
660 |
if (state->owner != owner) |
1da177e4c Linux-2.6.12-rc2 |
661 |
continue; |
1c816efa2 NFSv4: Fix a bug ... |
662 |
if (atomic_inc_not_zero(&state->count)) |
1da177e4c Linux-2.6.12-rc2 |
663 |
return state; |
1da177e4c Linux-2.6.12-rc2 |
664 665 666 |
} return NULL; } |
1da177e4c Linux-2.6.12-rc2 |
667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 |
static void nfs4_free_open_state(struct nfs4_state *state) { kfree(state); } struct nfs4_state * nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) { struct nfs4_state *state, *new; struct nfs_inode *nfsi = NFS_I(inode); spin_lock(&inode->i_lock); state = __nfs4_find_state_byowner(inode, owner); spin_unlock(&inode->i_lock); if (state) goto out; new = nfs4_alloc_open_state(); |
ec0734282 NFSv4: Fix up loc... |
685 |
spin_lock(&owner->so_lock); |
1da177e4c Linux-2.6.12-rc2 |
686 687 688 689 |
spin_lock(&inode->i_lock); state = __nfs4_find_state_byowner(inode, owner); if (state == NULL && new != NULL) { state = new; |
1da177e4c Linux-2.6.12-rc2 |
690 691 692 |
state->owner = owner; atomic_inc(&owner->so_count); list_add(&state->inode_states, &nfsi->open_states); |
0444d76ae fs: don't use igr... |
693 694 |
ihold(inode); state->inode = inode; |
1da177e4c Linux-2.6.12-rc2 |
695 |
spin_unlock(&inode->i_lock); |
ec0734282 NFSv4: Fix up loc... |
696 697 698 699 |
/* Note: The reclaim code dictates that we add stateless * and read-only stateids to the end of the list */ list_add_tail(&state->open_states, &owner->so_states); spin_unlock(&owner->so_lock); |
1da177e4c Linux-2.6.12-rc2 |
700 701 |
} else { spin_unlock(&inode->i_lock); |
ec0734282 NFSv4: Fix up loc... |
702 |
spin_unlock(&owner->so_lock); |
1da177e4c Linux-2.6.12-rc2 |
703 704 705 706 707 708 |
if (new) nfs4_free_open_state(new); } out: return state; } |
1da177e4c Linux-2.6.12-rc2 |
709 710 711 712 |
void nfs4_put_open_state(struct nfs4_state *state) { struct inode *inode = state->inode; struct nfs4_state_owner *owner = state->owner; |
ec0734282 NFSv4: Fix up loc... |
713 |
if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) |
1da177e4c Linux-2.6.12-rc2 |
714 |
return; |
ec0734282 NFSv4: Fix up loc... |
715 |
spin_lock(&inode->i_lock); |
ba683031f NFSv4: Fix a lock... |
716 |
list_del(&state->inode_states); |
1da177e4c Linux-2.6.12-rc2 |
717 |
list_del(&state->open_states); |
ec0734282 NFSv4: Fix up loc... |
718 719 |
spin_unlock(&inode->i_lock); spin_unlock(&owner->so_lock); |
1da177e4c Linux-2.6.12-rc2 |
720 |
iput(inode); |
1da177e4c Linux-2.6.12-rc2 |
721 722 723 724 725 |
nfs4_free_open_state(state); nfs4_put_state_owner(owner); } /* |
83c9d41e4 NFSv4: Remove nfs... |
726 |
* Close the current file. |
1da177e4c Linux-2.6.12-rc2 |
727 |
*/ |
643168c2d nfs4_closedata do... |
728 |
static void __nfs4_close(struct nfs4_state *state, |
8535b2be5 NFSv4: Don't use ... |
729 |
fmode_t fmode, gfp_t gfp_mask, int wait) |
1da177e4c Linux-2.6.12-rc2 |
730 |
{ |
1da177e4c Linux-2.6.12-rc2 |
731 |
struct nfs4_state_owner *owner = state->owner; |
003707c72 NFSv4: Always use... |
732 |
int call_close = 0; |
dc0b027df NFSv4: Convert th... |
733 |
fmode_t newstate; |
1da177e4c Linux-2.6.12-rc2 |
734 735 |
atomic_inc(&owner->so_count); |
1da177e4c Linux-2.6.12-rc2 |
736 |
/* Protect against nfs4_find_state() */ |
ec0734282 NFSv4: Fix up loc... |
737 |
spin_lock(&owner->so_lock); |
dc0b027df NFSv4: Convert th... |
738 |
switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
e76169238 NFSv4: Make nfs4_... |
739 740 741 742 743 744 745 746 747 |
case FMODE_READ: state->n_rdonly--; break; case FMODE_WRITE: state->n_wronly--; break; case FMODE_READ|FMODE_WRITE: state->n_rdwr--; } |
003707c72 NFSv4: Always use... |
748 |
newstate = FMODE_READ|FMODE_WRITE; |
e76169238 NFSv4: Make nfs4_... |
749 |
if (state->n_rdwr == 0) { |
003707c72 NFSv4: Always use... |
750 |
if (state->n_rdonly == 0) { |
e76169238 NFSv4: Make nfs4_... |
751 |
newstate &= ~FMODE_READ; |
003707c72 NFSv4: Always use... |
752 753 754 755 |
call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); } if (state->n_wronly == 0) { |
e76169238 NFSv4: Make nfs4_... |
756 |
newstate &= ~FMODE_WRITE; |
003707c72 NFSv4: Always use... |
757 758 759 760 761 |
call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); } if (newstate == 0) clear_bit(NFS_DELEGATED_STATE, &state->flags); |
e76169238 NFSv4: Make nfs4_... |
762 |
} |
003707c72 NFSv4: Always use... |
763 |
nfs4_state_set_mode_locked(state, newstate); |
ec0734282 NFSv4: Fix up loc... |
764 |
spin_unlock(&owner->so_lock); |
4cecb76ff NFSv4: Fix a race... |
765 |
|
003707c72 NFSv4: Always use... |
766 |
if (!call_close) { |
b39e625b6 NFSv4: Clean up n... |
767 768 |
nfs4_put_open_state(state); nfs4_put_state_owner(owner); |
1f7977c13 NFSv4.1: Simplify... |
769 770 |
} else nfs4_do_close(state, gfp_mask, wait); |
a49c3c773 NFSv4: Ensure tha... |
771 |
} |
643168c2d nfs4_closedata do... |
772 |
void nfs4_close_state(struct nfs4_state *state, fmode_t fmode) |
a49c3c773 NFSv4: Ensure tha... |
773 |
{ |
643168c2d nfs4_closedata do... |
774 |
__nfs4_close(state, fmode, GFP_NOFS, 0); |
a49c3c773 NFSv4: Ensure tha... |
775 |
} |
643168c2d nfs4_closedata do... |
776 |
void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode) |
a49c3c773 NFSv4: Ensure tha... |
777 |
{ |
643168c2d nfs4_closedata do... |
778 |
__nfs4_close(state, fmode, GFP_KERNEL, 1); |
1da177e4c Linux-2.6.12-rc2 |
779 780 781 782 783 784 785 |
} /* * Search the state->lock_states for an existing lock_owner * that is compatible with current->files */ static struct nfs4_lock_state * |
77041ed9b NFSv4: Ensure the... |
786 |
__nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid, unsigned int type) |
1da177e4c Linux-2.6.12-rc2 |
787 788 789 |
{ struct nfs4_lock_state *pos; list_for_each_entry(pos, &state->lock_states, ls_locks) { |
77041ed9b NFSv4: Ensure the... |
790 |
if (type != NFS4_ANY_LOCK_TYPE && pos->ls_owner.lo_type != type) |
1da177e4c Linux-2.6.12-rc2 |
791 |
continue; |
77041ed9b NFSv4: Ensure the... |
792 793 794 795 796 797 798 799 800 |
switch (pos->ls_owner.lo_type) { case NFS4_POSIX_LOCK_TYPE: if (pos->ls_owner.lo_u.posix_owner != fl_owner) continue; break; case NFS4_FLOCK_LOCK_TYPE: if (pos->ls_owner.lo_u.flock_owner != fl_pid) continue; } |
1da177e4c Linux-2.6.12-rc2 |
801 802 803 804 805 |
atomic_inc(&pos->ls_count); return pos; } return NULL; } |
1da177e4c Linux-2.6.12-rc2 |
806 807 808 809 |
/* * Return a compatible lock_state. If no initialized lock_state structure * exists, return an uninitialized one. * |
1da177e4c Linux-2.6.12-rc2 |
810 |
*/ |
77041ed9b NFSv4: Ensure the... |
811 |
static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid, unsigned int type) |
1da177e4c Linux-2.6.12-rc2 |
812 813 |
{ struct nfs4_lock_state *lsp; |
24d292b89 NFS: Move cl_stat... |
814 |
struct nfs_server *server = state->owner->so_server; |
1da177e4c Linux-2.6.12-rc2 |
815 |
|
8535b2be5 NFSv4: Don't use ... |
816 |
lsp = kzalloc(sizeof(*lsp), GFP_NOFS); |
1da177e4c Linux-2.6.12-rc2 |
817 818 |
if (lsp == NULL) return NULL; |
7ba127ab9 NFSv4: Move conte... |
819 |
nfs4_init_seqid_counter(&lsp->ls_seqid); |
1da177e4c Linux-2.6.12-rc2 |
820 |
atomic_set(&lsp->ls_count, 1); |
b64aec8d1 NFSv4: Fix an Oop... |
821 |
lsp->ls_state = state; |
77041ed9b NFSv4: Ensure the... |
822 823 824 825 826 827 828 829 830 |
lsp->ls_owner.lo_type = type; switch (lsp->ls_owner.lo_type) { case NFS4_FLOCK_LOCK_TYPE: lsp->ls_owner.lo_u.flock_owner = fl_pid; break; case NFS4_POSIX_LOCK_TYPE: lsp->ls_owner.lo_u.posix_owner = fl_owner; break; default: |
d2d7ce28a NFSv4: Replace lo... |
831 |
goto out_free; |
77041ed9b NFSv4: Ensure the... |
832 |
} |
48c22eb21 NFS: Move struct ... |
833 834 |
lsp->ls_seqid.owner_id = ida_simple_get(&server->lockowner_id, 0, 0, GFP_NOFS); if (lsp->ls_seqid.owner_id < 0) |
d2d7ce28a NFSv4: Replace lo... |
835 |
goto out_free; |
8d0a8a9d0 [PATCH] NFSv4: Cl... |
836 |
INIT_LIST_HEAD(&lsp->ls_locks); |
1da177e4c Linux-2.6.12-rc2 |
837 |
return lsp; |
d2d7ce28a NFSv4: Replace lo... |
838 839 840 |
out_free: kfree(lsp); return NULL; |
1da177e4c Linux-2.6.12-rc2 |
841 |
} |
5ae67c4fe NFSv4: It is not ... |
842 |
void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) |
9f958ab88 NFSv4: Reduce the... |
843 |
{ |
48c22eb21 NFS: Move struct ... |
844 |
ida_simple_remove(&server->lockowner_id, lsp->ls_seqid.owner_id); |
7ba127ab9 NFSv4: Move conte... |
845 |
nfs4_destroy_seqid_counter(&lsp->ls_seqid); |
9f958ab88 NFSv4: Reduce the... |
846 847 |
kfree(lsp); } |
1da177e4c Linux-2.6.12-rc2 |
848 849 850 851 |
/* * Return a compatible lock_state. If no initialized lock_state structure * exists, return an uninitialized one. * |
1da177e4c Linux-2.6.12-rc2 |
852 |
*/ |
77041ed9b NFSv4: Ensure the... |
853 |
static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner, pid_t pid, unsigned int type) |
1da177e4c Linux-2.6.12-rc2 |
854 |
{ |
8d0a8a9d0 [PATCH] NFSv4: Cl... |
855 |
struct nfs4_lock_state *lsp, *new = NULL; |
1da177e4c Linux-2.6.12-rc2 |
856 |
|
8d0a8a9d0 [PATCH] NFSv4: Cl... |
857 858 |
for(;;) { spin_lock(&state->state_lock); |
77041ed9b NFSv4: Ensure the... |
859 |
lsp = __nfs4_find_lock_state(state, owner, pid, type); |
8d0a8a9d0 [PATCH] NFSv4: Cl... |
860 861 862 |
if (lsp != NULL) break; if (new != NULL) { |
8d0a8a9d0 [PATCH] NFSv4: Cl... |
863 864 865 866 867 868 869 |
list_add(&new->ls_locks, &state->lock_states); set_bit(LK_STATE_IN_USE, &state->flags); lsp = new; new = NULL; break; } spin_unlock(&state->state_lock); |
77041ed9b NFSv4: Ensure the... |
870 |
new = nfs4_alloc_lock_state(state, owner, pid, type); |
8d0a8a9d0 [PATCH] NFSv4: Cl... |
871 872 873 874 |
if (new == NULL) return NULL; } spin_unlock(&state->state_lock); |
9f958ab88 NFSv4: Reduce the... |
875 |
if (new != NULL) |
5ae67c4fe NFSv4: It is not ... |
876 |
nfs4_free_lock_state(state->owner->so_server, new); |
1da177e4c Linux-2.6.12-rc2 |
877 878 879 880 |
return lsp; } /* |
8d0a8a9d0 [PATCH] NFSv4: Cl... |
881 882 |
* Release reference to lock_state, and free it if we see that * it is no longer in use |
1da177e4c Linux-2.6.12-rc2 |
883 |
*/ |
faf5f49c2 NFSv4: Make NFS c... |
884 |
void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
1da177e4c Linux-2.6.12-rc2 |
885 |
{ |
8d0a8a9d0 [PATCH] NFSv4: Cl... |
886 |
struct nfs4_state *state; |
1da177e4c Linux-2.6.12-rc2 |
887 |
|
8d0a8a9d0 [PATCH] NFSv4: Cl... |
888 889 890 891 892 893 894 895 896 |
if (lsp == NULL) return; state = lsp->ls_state; if (!atomic_dec_and_lock(&lsp->ls_count, &state->state_lock)) return; list_del(&lsp->ls_locks); if (list_empty(&state->lock_states)) clear_bit(LK_STATE_IN_USE, &state->flags); spin_unlock(&state->state_lock); |
795a88c96 NFSv4: Convert th... |
897 |
if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { |
cf470c3e0 NFSv4: Don't free... |
898 899 900 |
if (nfs4_release_lockowner(lsp) == 0) return; } |
5ae67c4fe NFSv4: It is not ... |
901 |
nfs4_free_lock_state(lsp->ls_state->owner->so_server, lsp); |
1da177e4c Linux-2.6.12-rc2 |
902 |
} |
8d0a8a9d0 [PATCH] NFSv4: Cl... |
903 |
static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
1da177e4c Linux-2.6.12-rc2 |
904 |
{ |
8d0a8a9d0 [PATCH] NFSv4: Cl... |
905 |
struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
1da177e4c Linux-2.6.12-rc2 |
906 |
|
8d0a8a9d0 [PATCH] NFSv4: Cl... |
907 908 909 |
dst->fl_u.nfs4_fl.owner = lsp; atomic_inc(&lsp->ls_count); } |
1da177e4c Linux-2.6.12-rc2 |
910 |
|
8d0a8a9d0 [PATCH] NFSv4: Cl... |
911 |
static void nfs4_fl_release_lock(struct file_lock *fl) |
1da177e4c Linux-2.6.12-rc2 |
912 |
{ |
8d0a8a9d0 [PATCH] NFSv4: Cl... |
913 |
nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
1da177e4c Linux-2.6.12-rc2 |
914 |
} |
6aed62853 const: make file_... |
915 |
static const struct file_lock_operations nfs4_fl_lock_ops = { |
8d0a8a9d0 [PATCH] NFSv4: Cl... |
916 917 918 919 920 |
.fl_copy_lock = nfs4_fl_copy_lock, .fl_release_private = nfs4_fl_release_lock, }; int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) |
1da177e4c Linux-2.6.12-rc2 |
921 |
{ |
8d0a8a9d0 [PATCH] NFSv4: Cl... |
922 923 924 925 |
struct nfs4_lock_state *lsp; if (fl->fl_ops != NULL) return 0; |
77041ed9b NFSv4: Ensure the... |
926 927 928 |
if (fl->fl_flags & FL_POSIX) lsp = nfs4_get_lock_state(state, fl->fl_owner, 0, NFS4_POSIX_LOCK_TYPE); else if (fl->fl_flags & FL_FLOCK) |
17280175c NFS: Fix a number... |
929 930 |
lsp = nfs4_get_lock_state(state, NULL, fl->fl_pid, NFS4_FLOCK_LOCK_TYPE); |
77041ed9b NFSv4: Ensure the... |
931 932 |
else return -EINVAL; |
8d0a8a9d0 [PATCH] NFSv4: Cl... |
933 934 935 936 937 |
if (lsp == NULL) return -ENOMEM; fl->fl_u.nfs4_fl.owner = lsp; fl->fl_ops = &nfs4_fl_lock_ops; return 0; |
1da177e4c Linux-2.6.12-rc2 |
938 |
} |
4fc8796d2 NFSv4: Clean up n... |
939 |
static bool nfs4_copy_lock_stateid(nfs4_stateid *dst, struct nfs4_state *state, |
2a369153c NFS: Clean up hel... |
940 |
const struct nfs_lockowner *lockowner) |
1da177e4c Linux-2.6.12-rc2 |
941 |
{ |
8d0a8a9d0 [PATCH] NFSv4: Cl... |
942 |
struct nfs4_lock_state *lsp; |
2a369153c NFS: Clean up hel... |
943 944 |
fl_owner_t fl_owner; pid_t fl_pid; |
4fc8796d2 NFSv4: Clean up n... |
945 |
bool ret = false; |
1da177e4c Linux-2.6.12-rc2 |
946 |
|
2a369153c NFS: Clean up hel... |
947 948 949 |
if (lockowner == NULL) goto out; |
8d0a8a9d0 [PATCH] NFSv4: Cl... |
950 |
if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
4fc8796d2 NFSv4: Clean up n... |
951 |
goto out; |
1da177e4c Linux-2.6.12-rc2 |
952 |
|
2a369153c NFS: Clean up hel... |
953 954 |
fl_owner = lockowner->l_owner; fl_pid = lockowner->l_pid; |
8d0a8a9d0 [PATCH] NFSv4: Cl... |
955 |
spin_lock(&state->state_lock); |
77041ed9b NFSv4: Ensure the... |
956 |
lsp = __nfs4_find_lock_state(state, fl_owner, fl_pid, NFS4_ANY_LOCK_TYPE); |
795a88c96 NFSv4: Convert th... |
957 |
if (lsp != NULL && test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) { |
f597c5379 NFSv4: Add helper... |
958 |
nfs4_stateid_copy(dst, &lsp->ls_stateid); |
4fc8796d2 NFSv4: Clean up n... |
959 960 |
ret = true; } |
8d0a8a9d0 [PATCH] NFSv4: Cl... |
961 |
spin_unlock(&state->state_lock); |
1da177e4c Linux-2.6.12-rc2 |
962 |
nfs4_put_lock_state(lsp); |
4fc8796d2 NFSv4: Clean up n... |
963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 |
out: return ret; } static void nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state) { int seq; do { seq = read_seqbegin(&state->seqlock); nfs4_stateid_copy(dst, &state->stateid); } while (read_seqretry(&state->seqlock, seq)); } /* * Byte-range lock aware utility to initialize the stateid of read/write * requests. */ void nfs4_select_rw_stateid(nfs4_stateid *dst, struct nfs4_state *state, |
2a369153c NFS: Clean up hel... |
982 |
fmode_t fmode, const struct nfs_lockowner *lockowner) |
4fc8796d2 NFSv4: Clean up n... |
983 984 985 |
{ if (nfs4_copy_delegation_stateid(dst, state->inode, fmode)) return; |
2a369153c NFS: Clean up hel... |
986 |
if (nfs4_copy_lock_stateid(dst, state, lockowner)) |
4fc8796d2 NFSv4: Clean up n... |
987 988 |
return; nfs4_copy_open_stateid(dst, state); |
1da177e4c Linux-2.6.12-rc2 |
989 |
} |
8535b2be5 NFSv4: Don't use ... |
990 |
struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask) |
cee54fc94 NFSv4: Add functi... |
991 |
{ |
cee54fc94 NFSv4: Add functi... |
992 |
struct nfs_seqid *new; |
8535b2be5 NFSv4: Don't use ... |
993 |
new = kmalloc(sizeof(*new), gfp_mask); |
cee54fc94 NFSv4: Add functi... |
994 995 |
if (new != NULL) { new->sequence = counter; |
2f74c0a05 NFSv4: Clean up t... |
996 |
INIT_LIST_HEAD(&new->list); |
4601df20f NFSv4: Avoid thun... |
997 |
new->task = NULL; |
cee54fc94 NFSv4: Add functi... |
998 999 1000 |
} return new; } |
72211dbe7 NFSv4: Release th... |
1001 |
void nfs_release_seqid(struct nfs_seqid *seqid) |
1da177e4c Linux-2.6.12-rc2 |
1002 |
{ |
4601df20f NFSv4: Avoid thun... |
1003 |
struct nfs_seqid_counter *sequence; |
cee54fc94 NFSv4: Add functi... |
1004 |
|
4601df20f NFSv4: Avoid thun... |
1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 |
if (list_empty(&seqid->list)) return; sequence = seqid->sequence; spin_lock(&sequence->lock); list_del_init(&seqid->list); if (!list_empty(&sequence->list)) { struct nfs_seqid *next; next = list_first_entry(&sequence->list, struct nfs_seqid, list); rpc_wake_up_queued_task(&sequence->wait, next->task); |
2f74c0a05 NFSv4: Clean up t... |
1016 |
} |
4601df20f NFSv4: Avoid thun... |
1017 |
spin_unlock(&sequence->lock); |
72211dbe7 NFSv4: Release th... |
1018 1019 1020 1021 1022 |
} void nfs_free_seqid(struct nfs_seqid *seqid) { nfs_release_seqid(seqid); |
cee54fc94 NFSv4: Add functi... |
1023 |
kfree(seqid); |
1da177e4c Linux-2.6.12-rc2 |
1024 1025 1026 |
} /* |
cee54fc94 NFSv4: Add functi... |
1027 1028 1029 1030 |
* Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or * failed with a seqid incrementing error - * see comments nfs_fs.h:seqid_mutating_error() */ |
88d909399 NFSv4: nfs_increm... |
1031 |
static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
cee54fc94 NFSv4: Add functi... |
1032 |
{ |
7ba127ab9 NFSv4: Move conte... |
1033 |
BUG_ON(list_first_entry(&seqid->sequence->list, struct nfs_seqid, list) != seqid); |
cee54fc94 NFSv4: Add functi... |
1034 1035 1036 1037 |
switch (status) { case 0: break; case -NFS4ERR_BAD_SEQID: |
6f43ddccb NFSv4: Improve th... |
1038 1039 |
if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) return; |
9a3ba4323 NFSv4: Rate limit... |
1040 |
pr_warn_ratelimited("NFS: v4 server returned a bad" |
497799e7c NFS: missing spac... |
1041 1042 1043 |
" sequence-id error on an" " unconfirmed sequence %p! ", |
6f43ddccb NFSv4: Improve th... |
1044 |
seqid->sequence); |
cee54fc94 NFSv4: Add functi... |
1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 |
case -NFS4ERR_STALE_CLIENTID: case -NFS4ERR_STALE_STATEID: case -NFS4ERR_BAD_STATEID: case -NFS4ERR_BADXDR: case -NFS4ERR_RESOURCE: case -NFS4ERR_NOFILEHANDLE: /* Non-seqid mutating errors */ return; }; /* * Note: no locking needed as we are guaranteed to be first * on the sequence list */ seqid->sequence->counter++; } void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) { |
34dc1ad75 nfs41: increment_... |
1063 1064 1065 1066 1067 |
struct nfs4_state_owner *sp = container_of(seqid->sequence, struct nfs4_state_owner, so_seqid); struct nfs_server *server = sp->so_server; if (status == -NFS4ERR_BAD_SEQID) |
1da177e4c Linux-2.6.12-rc2 |
1068 |
nfs4_drop_state_owner(sp); |
34dc1ad75 nfs41: increment_... |
1069 1070 |
if (!nfs4_has_session(server->nfs_client)) nfs_increment_seqid(status, seqid); |
cee54fc94 NFSv4: Add functi... |
1071 1072 1073 |
} /* |
cee54fc94 NFSv4: Add functi... |
1074 1075 1076 1077 1078 1079 |
* Increment the seqid if the LOCK/LOCKU succeeded, or * failed with a seqid incrementing error - * see comments nfs_fs.h:seqid_mutating_error() */ void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) { |
88d909399 NFSv4: nfs_increm... |
1080 |
nfs_increment_seqid(status, seqid); |
cee54fc94 NFSv4: Add functi... |
1081 1082 1083 1084 |
} int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) { |
7ba127ab9 NFSv4: Move conte... |
1085 |
struct nfs_seqid_counter *sequence = seqid->sequence; |
cee54fc94 NFSv4: Add functi... |
1086 1087 1088 |
int status = 0; spin_lock(&sequence->lock); |
4601df20f NFSv4: Avoid thun... |
1089 |
seqid->task = task; |
2f74c0a05 NFSv4: Clean up t... |
1090 1091 1092 1093 |
if (list_empty(&seqid->list)) list_add_tail(&seqid->list, &sequence->list); if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) goto unlock; |
5d00837b9 SUNRPC: Run rpc t... |
1094 |
rpc_sleep_on(&sequence->wait, task, NULL); |
2f74c0a05 NFSv4: Clean up t... |
1095 1096 |
status = -EAGAIN; unlock: |
cee54fc94 NFSv4: Add functi... |
1097 1098 |
spin_unlock(&sequence->lock); return status; |
1da177e4c Linux-2.6.12-rc2 |
1099 |
} |
e005e8041 NFSv4: Rename the... |
1100 |
static int nfs4_run_state_manager(void *); |
1da177e4c Linux-2.6.12-rc2 |
1101 |
|
e005e8041 NFSv4: Rename the... |
1102 |
static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
433fbe4c8 NFSv4: State reco... |
1103 1104 |
{ smp_mb__before_clear_bit(); |
e005e8041 NFSv4: Rename the... |
1105 |
clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
433fbe4c8 NFSv4: State reco... |
1106 |
smp_mb__after_clear_bit(); |
e005e8041 NFSv4: Rename the... |
1107 |
wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
433fbe4c8 NFSv4: State reco... |
1108 1109 |
rpc_wake_up(&clp->cl_rpcwaitq); } |
1da177e4c Linux-2.6.12-rc2 |
1110 |
/* |
e005e8041 NFSv4: Rename the... |
1111 |
* Schedule the nfs_client asynchronous state management routine |
1da177e4c Linux-2.6.12-rc2 |
1112 |
*/ |
b0d3ded1a NFSv4: Clean up n... |
1113 |
void nfs4_schedule_state_manager(struct nfs_client *clp) |
1da177e4c Linux-2.6.12-rc2 |
1114 |
{ |
5043e900f NFS: Convert inst... |
1115 |
struct task_struct *task; |
2446ab607 SUNRPC: Use RCU t... |
1116 |
char buf[INET6_ADDRSTRLEN + sizeof("-manager") + 1]; |
1da177e4c Linux-2.6.12-rc2 |
1117 |
|
e005e8041 NFSv4: Rename the... |
1118 1119 |
if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) return; |
5043e900f NFS: Convert inst... |
1120 1121 |
__module_get(THIS_MODULE); atomic_inc(&clp->cl_count); |
2446ab607 SUNRPC: Use RCU t... |
1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 |
/* The rcu_read_lock() is not strictly necessary, as the state * manager is the only thread that ever changes the rpc_xprt * after it's initialized. At this point, we're single threaded. */ rcu_read_lock(); snprintf(buf, sizeof(buf), "%s-manager", rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); rcu_read_unlock(); task = kthread_run(nfs4_run_state_manager, clp, buf); if (IS_ERR(task)) { printk(KERN_ERR "%s: kthread_run: %ld ", __func__, PTR_ERR(task)); nfs4_clear_state_manager_bit(clp); nfs_put_client(clp); module_put(THIS_MODULE); } |
1da177e4c Linux-2.6.12-rc2 |
1139 1140 1141 |
} /* |
0400a6b0c NFSv4/4.1: Fix nf... |
1142 |
* Schedule a lease recovery attempt |
1da177e4c Linux-2.6.12-rc2 |
1143 |
*/ |
0400a6b0c NFSv4/4.1: Fix nf... |
1144 |
void nfs4_schedule_lease_recovery(struct nfs_client *clp) |
1da177e4c Linux-2.6.12-rc2 |
1145 1146 1147 |
{ if (!clp) return; |
e598d843c NFSv4: Remove red... |
1148 1149 |
if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
cc0a98436 NFSv4: Add debugg... |
1150 1151 1152 |
dprintk("%s: scheduling lease recovery for server %s ", __func__, clp->cl_hostname); |
e005e8041 NFSv4: Rename the... |
1153 |
nfs4_schedule_state_manager(clp); |
1da177e4c Linux-2.6.12-rc2 |
1154 |
} |
9cb819683 NFSv4.1 handle DS... |
1155 |
EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery); |
1da177e4c Linux-2.6.12-rc2 |
1156 |
|
ad1e39682 NFSv4.0: Re-estab... |
1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 |
/* * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN * @clp: client to process * * Set the NFS4CLNT_LEASE_EXPIRED state in order to force a * resend of the SETCLIENTID and hence re-establish the * callback channel. Then return all existing delegations. */ static void nfs40_handle_cb_pathdown(struct nfs_client *clp) { set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); nfs_expire_all_delegations(clp); |
cc0a98436 NFSv4: Add debugg... |
1169 1170 1171 |
dprintk("%s: handling CB_PATHDOWN recovery for server %s ", __func__, clp->cl_hostname); |
ad1e39682 NFSv4.0: Re-estab... |
1172 |
} |
042b60beb NFSv4: renewd nee... |
1173 1174 |
void nfs4_schedule_path_down_recovery(struct nfs_client *clp) { |
ad1e39682 NFSv4.0: Re-estab... |
1175 |
nfs40_handle_cb_pathdown(clp); |
042b60beb NFSv4: renewd nee... |
1176 1177 |
nfs4_schedule_state_manager(clp); } |
f9feab1e1 NFSv4: nfs4_state... |
1178 |
static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b4 NFSv4: Fix state ... |
1179 1180 1181 1182 1183 1184 1185 1186 |
{ set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); /* Don't recover state that expired before the reboot */ if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); return 0; } |
7eff03aec NFSv4: Add a reco... |
1187 |
set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
b79a4a1b4 NFSv4: Fix state ... |
1188 1189 1190 |
set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); return 1; } |
f9feab1e1 NFSv4: nfs4_state... |
1191 |
static int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b4 NFSv4: Fix state ... |
1192 1193 1194 |
{ set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
7eff03aec NFSv4: Add a reco... |
1195 |
set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
b79a4a1b4 NFSv4: Fix state ... |
1196 1197 1198 |
set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); return 1; } |
0400a6b0c NFSv4/4.1: Fix nf... |
1199 1200 1201 1202 1203 |
void nfs4_schedule_stateid_recovery(const struct nfs_server *server, struct nfs4_state *state) { struct nfs_client *clp = server->nfs_client; nfs4_state_mark_reclaim_nograce(clp, state); |
cc0a98436 NFSv4: Add debugg... |
1204 1205 1206 |
dprintk("%s: scheduling stateid recovery for server %s ", __func__, clp->cl_hostname); |
0400a6b0c NFSv4/4.1: Fix nf... |
1207 1208 |
nfs4_schedule_state_manager(clp); } |
9cb819683 NFSv4.1 handle DS... |
1209 |
EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery); |
0400a6b0c NFSv4/4.1: Fix nf... |
1210 |
|
a1d0b5eeb NFS: Properly han... |
1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 |
void nfs_inode_find_state_and_recover(struct inode *inode, const nfs4_stateid *stateid) { struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; struct nfs_inode *nfsi = NFS_I(inode); struct nfs_open_context *ctx; struct nfs4_state *state; bool found = false; spin_lock(&inode->i_lock); list_for_each_entry(ctx, &nfsi->open_files, list) { state = ctx->state; if (state == NULL) continue; if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) continue; |
f597c5379 NFSv4: Add helper... |
1227 |
if (!nfs4_stateid_match(&state->stateid, stateid)) |
a1d0b5eeb NFS: Properly han... |
1228 1229 1230 1231 1232 1233 1234 1235 |
continue; nfs4_state_mark_reclaim_nograce(clp, state); found = true; } spin_unlock(&inode->i_lock); if (found) nfs4_schedule_state_manager(clp); } |
028600143 NFSv4: Clean up f... |
1236 |
static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops) |
1da177e4c Linux-2.6.12-rc2 |
1237 1238 |
{ struct inode *inode = state->inode; |
19e03c570 NFSv4: Ensure tha... |
1239 |
struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4c Linux-2.6.12-rc2 |
1240 1241 |
struct file_lock *fl; int status = 0; |
3f09df70e NFS: Ensure we al... |
1242 1243 1244 1245 |
if (inode->i_flock == NULL) return 0; /* Guard against delegation returns and new lock/unlock calls */ |
19e03c570 NFSv4: Ensure tha... |
1246 |
down_write(&nfsi->rwsem); |
3f09df70e NFS: Ensure we al... |
1247 |
/* Protect inode->i_flock using the BKL */ |
b89f43213 fs/locks.c: prepa... |
1248 |
lock_flocks(); |
90dc7d279 nfs: fix sparse w... |
1249 |
for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) { |
43b2a33aa NFSv4: Fix recove... |
1250 |
if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK))) |
1da177e4c Linux-2.6.12-rc2 |
1251 |
continue; |
cd3758e37 NFS: Replace file... |
1252 |
if (nfs_file_open_context(fl->fl_file)->state != state) |
1da177e4c Linux-2.6.12-rc2 |
1253 |
continue; |
b89f43213 fs/locks.c: prepa... |
1254 |
unlock_flocks(); |
1da177e4c Linux-2.6.12-rc2 |
1255 |
status = ops->recover_lock(state, fl); |
1da177e4c Linux-2.6.12-rc2 |
1256 |
switch (status) { |
965b5d679 NFSv4: Handle mor... |
1257 1258 1259 1260 1261 1262 1263 1264 1265 |
case 0: break; case -ESTALE: case -NFS4ERR_ADMIN_REVOKED: case -NFS4ERR_STALE_STATEID: case -NFS4ERR_BAD_STATEID: case -NFS4ERR_EXPIRED: case -NFS4ERR_NO_GRACE: case -NFS4ERR_STALE_CLIENTID: |
9c4c761a6 NFSv4.1: Handle N... |
1266 1267 1268 1269 |
case -NFS4ERR_BADSESSION: case -NFS4ERR_BADSLOT: case -NFS4ERR_BAD_HIGH_SLOT: case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
965b5d679 NFSv4: Handle mor... |
1270 |
goto out; |
1da177e4c Linux-2.6.12-rc2 |
1271 |
default: |
a030889a0 NFS: start printk... |
1272 1273 1274 |
printk(KERN_ERR "NFS: %s: unhandled error %d. " "Zeroing state ", __func__, status); |
965b5d679 NFSv4: Handle mor... |
1275 1276 |
case -ENOMEM: case -NFS4ERR_DENIED: |
1da177e4c Linux-2.6.12-rc2 |
1277 1278 |
case -NFS4ERR_RECLAIM_BAD: case -NFS4ERR_RECLAIM_CONFLICT: |
43b2a33aa NFSv4: Fix recove... |
1279 |
/* kill_proc(fl->fl_pid, SIGLOST, 1); */ |
965b5d679 NFSv4: Handle mor... |
1280 |
status = 0; |
1da177e4c Linux-2.6.12-rc2 |
1281 |
} |
b89f43213 fs/locks.c: prepa... |
1282 |
lock_flocks(); |
1da177e4c Linux-2.6.12-rc2 |
1283 |
} |
b89f43213 fs/locks.c: prepa... |
1284 |
unlock_flocks(); |
965b5d679 NFSv4: Handle mor... |
1285 |
out: |
19e03c570 NFSv4: Ensure tha... |
1286 |
up_write(&nfsi->rwsem); |
1da177e4c Linux-2.6.12-rc2 |
1287 1288 |
return status; } |
028600143 NFSv4: Clean up f... |
1289 |
static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs4_state_recovery_ops *ops) |
1da177e4c Linux-2.6.12-rc2 |
1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 |
{ struct nfs4_state *state; struct nfs4_lock_state *lock; int status = 0; /* Note: we rely on the sp->so_states list being ordered * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) * states first. * This is needed to ensure that the server won't give us any * read delegations that we have to return if, say, we are * recovering after a network partition or a reboot from a * server that doesn't support a grace period. */ |
fe1d81952 NFSv4: Ensure tha... |
1303 1304 |
restart: spin_lock(&sp->so_lock); |
1da177e4c Linux-2.6.12-rc2 |
1305 |
list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b4 NFSv4: Fix state ... |
1306 1307 |
if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) continue; |
1da177e4c Linux-2.6.12-rc2 |
1308 1309 |
if (state->state == 0) continue; |
fe1d81952 NFSv4: Ensure tha... |
1310 1311 |
atomic_inc(&state->count); spin_unlock(&sp->so_lock); |
1da177e4c Linux-2.6.12-rc2 |
1312 |
status = ops->recover_open(sp, state); |
1da177e4c Linux-2.6.12-rc2 |
1313 |
if (status >= 0) { |
028600143 NFSv4: Clean up f... |
1314 1315 |
status = nfs4_reclaim_locks(state, ops); if (status >= 0) { |
4b44b40e0 NFSv4: Ensure cor... |
1316 |
spin_lock(&state->state_lock); |
028600143 NFSv4: Clean up f... |
1317 |
list_for_each_entry(lock, &state->lock_states, ls_locks) { |
795a88c96 NFSv4: Convert th... |
1318 |
if (!test_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags)) |
96dcadc2f NFSv4: Rate limit... |
1319 1320 |
pr_warn_ratelimited("NFS: " "%s: Lock reclaim " |
a030889a0 NFS: start printk... |
1321 1322 |
"failed! ", __func__); |
028600143 NFSv4: Clean up f... |
1323 |
} |
4b44b40e0 NFSv4: Ensure cor... |
1324 |
spin_unlock(&state->state_lock); |
fe1d81952 NFSv4: Ensure tha... |
1325 1326 |
nfs4_put_open_state(state); goto restart; |
1da177e4c Linux-2.6.12-rc2 |
1327 |
} |
1da177e4c Linux-2.6.12-rc2 |
1328 1329 1330 |
} switch (status) { default: |
a030889a0 NFS: start printk... |
1331 1332 1333 |
printk(KERN_ERR "NFS: %s: unhandled error %d. " "Zeroing state ", __func__, status); |
1da177e4c Linux-2.6.12-rc2 |
1334 |
case -ENOENT: |
965b5d679 NFSv4: Handle mor... |
1335 |
case -ENOMEM: |
b79a4a1b4 NFSv4: Fix state ... |
1336 |
case -ESTALE: |
1da177e4c Linux-2.6.12-rc2 |
1337 1338 1339 1340 |
/* * Open state on this file cannot be recovered * All we can do is revert to using the zero stateid. */ |
2d2f24add NFSv4: Simplify t... |
1341 1342 |
memset(&state->stateid, 0, sizeof(state->stateid)); |
1da177e4c Linux-2.6.12-rc2 |
1343 1344 1345 |
/* Mark the file as being 'closed' */ state->state = 0; break; |
168667c43 NFSv4: The state ... |
1346 1347 1348 1349 1350 1351 1352 1353 |
case -EKEYEXPIRED: /* * User RPCSEC_GSS context has expired. * We cannot recover this stateid now, so * skip it and allow recovery thread to * proceed. */ break; |
965b5d679 NFSv4: Handle mor... |
1354 1355 1356 |
case -NFS4ERR_ADMIN_REVOKED: case -NFS4ERR_STALE_STATEID: case -NFS4ERR_BAD_STATEID: |
b79a4a1b4 NFSv4: Fix state ... |
1357 1358 |
case -NFS4ERR_RECLAIM_BAD: case -NFS4ERR_RECLAIM_CONFLICT: |
1f0e890db NFSv4: Clean up s... |
1359 |
nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
b79a4a1b4 NFSv4: Fix state ... |
1360 |
break; |
1da177e4c Linux-2.6.12-rc2 |
1361 1362 |
case -NFS4ERR_EXPIRED: case -NFS4ERR_NO_GRACE: |
1f0e890db NFSv4: Clean up s... |
1363 |
nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
1da177e4c Linux-2.6.12-rc2 |
1364 |
case -NFS4ERR_STALE_CLIENTID: |
9c4c761a6 NFSv4.1: Handle N... |
1365 1366 1367 1368 |
case -NFS4ERR_BADSESSION: case -NFS4ERR_BADSLOT: case -NFS4ERR_BAD_HIGH_SLOT: case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
1da177e4c Linux-2.6.12-rc2 |
1369 1370 |
goto out_err; } |
fe1d81952 NFSv4: Ensure tha... |
1371 1372 |
nfs4_put_open_state(state); goto restart; |
1da177e4c Linux-2.6.12-rc2 |
1373 |
} |
fe1d81952 NFSv4: Ensure tha... |
1374 |
spin_unlock(&sp->so_lock); |
1da177e4c Linux-2.6.12-rc2 |
1375 1376 |
return 0; out_err: |
fe1d81952 NFSv4: Ensure tha... |
1377 |
nfs4_put_open_state(state); |
1da177e4c Linux-2.6.12-rc2 |
1378 1379 |
return status; } |
b79a4a1b4 NFSv4: Fix state ... |
1380 1381 1382 1383 1384 1385 1386 1387 |
static void nfs4_clear_open_state(struct nfs4_state *state) { struct nfs4_lock_state *lock; clear_bit(NFS_DELEGATED_STATE, &state->flags); clear_bit(NFS_O_RDONLY_STATE, &state->flags); clear_bit(NFS_O_WRONLY_STATE, &state->flags); clear_bit(NFS_O_RDWR_STATE, &state->flags); |
4b44b40e0 NFSv4: Ensure cor... |
1388 |
spin_lock(&state->state_lock); |
b79a4a1b4 NFSv4: Fix state ... |
1389 |
list_for_each_entry(lock, &state->lock_states, ls_locks) { |
b79a4a1b4 NFSv4: Fix state ... |
1390 |
lock->ls_seqid.flags = 0; |
795a88c96 NFSv4: Convert th... |
1391 |
clear_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags); |
b79a4a1b4 NFSv4: Fix state ... |
1392 |
} |
4b44b40e0 NFSv4: Ensure cor... |
1393 |
spin_unlock(&state->state_lock); |
b79a4a1b4 NFSv4: Fix state ... |
1394 |
} |
24d292b89 NFS: Move cl_stat... |
1395 1396 |
static void nfs4_reset_seqids(struct nfs_server *server, int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) |
cee54fc94 NFSv4: Add functi... |
1397 |
{ |
24d292b89 NFS: Move cl_stat... |
1398 |
struct nfs_client *clp = server->nfs_client; |
cee54fc94 NFSv4: Add functi... |
1399 |
struct nfs4_state_owner *sp; |
9f958ab88 NFSv4: Reduce the... |
1400 |
struct rb_node *pos; |
cee54fc94 NFSv4: Add functi... |
1401 |
struct nfs4_state *state; |
cee54fc94 NFSv4: Add functi... |
1402 |
|
24d292b89 NFS: Move cl_stat... |
1403 1404 1405 1406 1407 |
spin_lock(&clp->cl_lock); for (pos = rb_first(&server->state_owners); pos != NULL; pos = rb_next(pos)) { sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); |
cee54fc94 NFSv4: Add functi... |
1408 |
sp->so_seqid.flags = 0; |
ec0734282 NFSv4: Fix up loc... |
1409 |
spin_lock(&sp->so_lock); |
cee54fc94 NFSv4: Add functi... |
1410 |
list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b4 NFSv4: Fix state ... |
1411 1412 |
if (mark_reclaim(clp, state)) nfs4_clear_open_state(state); |
cee54fc94 NFSv4: Add functi... |
1413 |
} |
ec0734282 NFSv4: Fix up loc... |
1414 |
spin_unlock(&sp->so_lock); |
cee54fc94 NFSv4: Add functi... |
1415 |
} |
24d292b89 NFS: Move cl_stat... |
1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 |
spin_unlock(&clp->cl_lock); } static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) { struct nfs_server *server; rcu_read_lock(); list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) nfs4_reset_seqids(server, mark_reclaim); rcu_read_unlock(); |
cee54fc94 NFSv4: Add functi... |
1428 |
} |
b79a4a1b4 NFSv4: Fix state ... |
1429 1430 1431 1432 1433 1434 |
static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) { /* Mark all delegations for reclaim */ nfs_delegation_mark_reclaim(clp); nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); } |
fce5c838e nfs41: RECLAIM_CO... |
1435 1436 1437 1438 1439 1440 1441 |
static void nfs4_reclaim_complete(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops) { /* Notify the server we're done reclaiming our state */ if (ops->reclaim_complete) (void)ops->reclaim_complete(clp); } |
24d292b89 NFS: Move cl_stat... |
1442 |
static void nfs4_clear_reclaim_server(struct nfs_server *server) |
b79a4a1b4 NFSv4: Fix state ... |
1443 |
{ |
24d292b89 NFS: Move cl_stat... |
1444 |
struct nfs_client *clp = server->nfs_client; |
b79a4a1b4 NFSv4: Fix state ... |
1445 1446 1447 |
struct nfs4_state_owner *sp; struct rb_node *pos; struct nfs4_state *state; |
24d292b89 NFS: Move cl_stat... |
1448 1449 1450 1451 1452 |
spin_lock(&clp->cl_lock); for (pos = rb_first(&server->state_owners); pos != NULL; pos = rb_next(pos)) { sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); |
b79a4a1b4 NFSv4: Fix state ... |
1453 1454 |
spin_lock(&sp->so_lock); list_for_each_entry(state, &sp->so_states, open_states) { |
24d292b89 NFS: Move cl_stat... |
1455 1456 |
if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags)) |
b79a4a1b4 NFSv4: Fix state ... |
1457 1458 1459 1460 1461 |
continue; nfs4_state_mark_reclaim_nograce(clp, state); } spin_unlock(&sp->so_lock); } |
24d292b89 NFS: Move cl_stat... |
1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 |
spin_unlock(&clp->cl_lock); } static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) { struct nfs_server *server; if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) return 0; rcu_read_lock(); list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) nfs4_clear_reclaim_server(server); rcu_read_unlock(); |
b79a4a1b4 NFSv4: Fix state ... |
1476 1477 |
nfs_delegation_reap_unclaimed(clp); |
6eaa61496 NFSv4: Don't call... |
1478 1479 1480 1481 1482 1483 1484 1485 |
return 1; } static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) { if (!nfs4_state_clear_reclaim_reboot(clp)) return; nfs4_reclaim_complete(clp, clp->cl_mvops->reboot_recovery_ops); |
b79a4a1b4 NFSv4: Fix state ... |
1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 |
} static void nfs_delegation_clear_all(struct nfs_client *clp) { nfs_delegation_mark_reclaim(clp); nfs_delegation_reap_unclaimed(clp); } static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) { nfs_delegation_clear_all(clp); nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); } |
168667c43 NFSv4: The state ... |
1499 1500 1501 1502 1503 1504 1505 1506 |
static void nfs4_warn_keyexpired(const char *s) { printk_ratelimited(KERN_WARNING "Error: state manager" " encountered RPCSEC_GSS session" " expired against NFSv4 server %s. ", s); } |
4f7cdf18e NFSv4: The state ... |
1507 |
static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
e598d843c NFSv4: Remove red... |
1508 1509 |
{ switch (error) { |
4f38e4aad NFSv4: Don't erro... |
1510 1511 |
case 0: break; |
e598d843c NFSv4: Remove red... |
1512 |
case -NFS4ERR_CB_PATH_DOWN: |
ad1e39682 NFSv4.0: Re-estab... |
1513 |
nfs40_handle_cb_pathdown(clp); |
4f38e4aad NFSv4: Don't erro... |
1514 |
break; |
c8b7ae3d3 NFSv4: Ensure the... |
1515 1516 |
case -NFS4ERR_NO_GRACE: nfs4_state_end_reclaim_reboot(clp); |
4f38e4aad NFSv4: Don't erro... |
1517 |
break; |
e598d843c NFSv4: Remove red... |
1518 1519 1520 |
case -NFS4ERR_STALE_CLIENTID: case -NFS4ERR_LEASE_MOVED: set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
6eaa61496 NFSv4: Don't call... |
1521 |
nfs4_state_clear_reclaim_reboot(clp); |
e598d843c NFSv4: Remove red... |
1522 1523 1524 1525 1526 |
nfs4_state_start_reclaim_reboot(clp); break; case -NFS4ERR_EXPIRED: set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); nfs4_state_start_reclaim_nograce(clp); |
8ba9bf8e5 nfs41: fix switch... |
1527 |
break; |
c3fad1b1a nfs41: add sessio... |
1528 1529 1530 1531 |
case -NFS4ERR_BADSESSION: case -NFS4ERR_BADSLOT: case -NFS4ERR_BAD_HIGH_SLOT: case -NFS4ERR_DEADSESSION: |
c3fad1b1a nfs41: add sessio... |
1532 1533 |
case -NFS4ERR_SEQ_FALSE_RETRY: case -NFS4ERR_SEQ_MISORDERED: |
6df08189f nfs41: rename cl_... |
1534 |
set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
0b9e2d41f nfs41: only state... |
1535 |
/* Zero session reset errors */ |
4f38e4aad NFSv4: Don't erro... |
1536 |
break; |
7c5d72568 NFSv4.1: Handle N... |
1537 1538 1539 |
case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); break; |
168667c43 NFSv4: The state ... |
1540 1541 1542 |
case -EKEYEXPIRED: /* Nothing we can do */ nfs4_warn_keyexpired(clp->cl_hostname); |
4f38e4aad NFSv4: Don't erro... |
1543 1544 |
break; default: |
cc0a98436 NFSv4: Add debugg... |
1545 1546 1547 |
dprintk("%s: failed to handle error %d for server %s ", __func__, error, clp->cl_hostname); |
4f38e4aad NFSv4: Don't erro... |
1548 |
return error; |
e598d843c NFSv4: Remove red... |
1549 |
} |
cc0a98436 NFSv4: Add debugg... |
1550 1551 1552 |
dprintk("%s: handled error %d for server %s ", __func__, error, clp->cl_hostname); |
4f38e4aad NFSv4: Don't erro... |
1553 |
return 0; |
e598d843c NFSv4: Remove red... |
1554 |
} |
028600143 NFSv4: Clean up f... |
1555 |
static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops) |
1da177e4c Linux-2.6.12-rc2 |
1556 |
{ |
24d292b89 NFS: Move cl_stat... |
1557 1558 |
struct nfs4_state_owner *sp; struct nfs_server *server; |
9f958ab88 NFSv4: Reduce the... |
1559 |
struct rb_node *pos; |
1da177e4c Linux-2.6.12-rc2 |
1560 |
int status = 0; |
7eff03aec NFSv4: Add a reco... |
1561 |
restart: |
24d292b89 NFS: Move cl_stat... |
1562 1563 |
rcu_read_lock(); list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
0aaaf5c42 NFS: Cache state ... |
1564 |
nfs4_purge_state_owners(server); |
24d292b89 NFS: Move cl_stat... |
1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 |
spin_lock(&clp->cl_lock); for (pos = rb_first(&server->state_owners); pos != NULL; pos = rb_next(pos)) { sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); if (!test_and_clear_bit(ops->owner_flag_bit, &sp->so_flags)) continue; atomic_inc(&sp->so_count); spin_unlock(&clp->cl_lock); rcu_read_unlock(); status = nfs4_reclaim_open_state(sp, ops); if (status < 0) { set_bit(ops->owner_flag_bit, &sp->so_flags); nfs4_put_state_owner(sp); return nfs4_recovery_handle_error(clp, status); } |
7eff03aec NFSv4: Add a reco... |
1584 |
nfs4_put_state_owner(sp); |
24d292b89 NFS: Move cl_stat... |
1585 |
goto restart; |
7eff03aec NFSv4: Add a reco... |
1586 |
} |
24d292b89 NFS: Move cl_stat... |
1587 |
spin_unlock(&clp->cl_lock); |
028600143 NFSv4: Clean up f... |
1588 |
} |
24d292b89 NFS: Move cl_stat... |
1589 |
rcu_read_unlock(); |
028600143 NFSv4: Clean up f... |
1590 1591 1592 1593 1594 1595 |
return status; } static int nfs4_check_lease(struct nfs_client *clp) { struct rpc_cred *cred; |
c48f4f354 NFSv41: Convert t... |
1596 1597 |
const struct nfs4_state_maintenance_ops *ops = clp->cl_mvops->state_renewal_ops; |
4f38e4aad NFSv4: Don't erro... |
1598 |
int status; |
1da177e4c Linux-2.6.12-rc2 |
1599 |
|
0f605b560 NFSv4: Don't tell... |
1600 1601 1602 |
/* Is the client already known to have an expired lease? */ if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) return 0; |
a7b721037 nfs41: introduce ... |
1603 1604 1605 |
spin_lock(&clp->cl_lock); cred = ops->get_state_renewal_cred_locked(clp); spin_unlock(&clp->cl_lock); |
0f605b560 NFSv4: Don't tell... |
1606 1607 |
if (cred == NULL) { cred = nfs4_get_setclientid_cred(clp); |
4f38e4aad NFSv4: Don't erro... |
1608 |
status = -ENOKEY; |
0f605b560 NFSv4: Don't tell... |
1609 1610 |
if (cred == NULL) goto out; |
286d7d6a0 NFSv4: Remove req... |
1611 |
} |
8e69514f2 nfs41: support mi... |
1612 |
status = ops->renew_lease(clp, cred); |
0f605b560 NFSv4: Don't tell... |
1613 1614 |
put_rpccred(cred); out: |
4f7cdf18e NFSv4: The state ... |
1615 |
return nfs4_recovery_handle_error(clp, status); |
028600143 NFSv4: Clean up f... |
1616 |
} |
47b803c8d NFSv4.0 reclaim r... |
1617 1618 |
/* Set NFS4CLNT_LEASE_EXPIRED and reclaim reboot state for all v4.0 errors * and for recoverable errors on EXCHANGE_ID for v4.1 |
2a6ee6aa2 NFSv4: Clean up t... |
1619 1620 1621 1622 |
*/ static int nfs4_handle_reclaim_lease_error(struct nfs_client *clp, int status) { switch (status) { |
89a217360 NFSv4.1: Handle N... |
1623 1624 1625 1626 1627 |
case -NFS4ERR_SEQ_MISORDERED: if (test_and_set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) return -ESERVERFAULT; /* Lease confirmation error: retry after purging the lease */ ssleep(1); |
47b803c8d NFSv4.0 reclaim r... |
1628 1629 |
clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); break; |
2a6ee6aa2 NFSv4: Clean up t... |
1630 1631 |
case -NFS4ERR_STALE_CLIENTID: clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
47b803c8d NFSv4.0 reclaim r... |
1632 1633 |
nfs4_state_clear_reclaim_reboot(clp); nfs4_state_start_reclaim_reboot(clp); |
2a6ee6aa2 NFSv4: Clean up t... |
1634 |
break; |
de7348312 NFS: Treat NFS4ER... |
1635 1636 1637 1638 1639 1640 1641 |
case -NFS4ERR_CLID_INUSE: pr_err("NFS: Server %s reports our clientid is in use ", clp->cl_hostname); nfs_mark_client_ready(clp, -EPERM); clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); return -EPERM; |
2a6ee6aa2 NFSv4: Clean up t... |
1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 |
case -EACCES: if (clp->cl_machine_cred == NULL) return -EACCES; /* Handle case where the user hasn't set up machine creds */ nfs4_clear_machine_cred(clp); case -NFS4ERR_DELAY: case -ETIMEDOUT: case -EAGAIN: ssleep(1); break; case -NFS4ERR_MINOR_VERS_MISMATCH: if (clp->cl_cons_state == NFS_CS_SESSION_INITING) nfs_mark_client_ready(clp, -EPROTONOSUPPORT); |
cc0a98436 NFSv4: Add debugg... |
1656 1657 1658 |
dprintk("%s: exit with error %d for server %s ", __func__, -EPROTONOSUPPORT, clp->cl_hostname); |
2a6ee6aa2 NFSv4: Clean up t... |
1659 1660 1661 1662 1663 1664 |
return -EPROTONOSUPPORT; case -EKEYEXPIRED: nfs4_warn_keyexpired(clp->cl_hostname); case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery * in nfs4_exchange_id */ default: |
cc0a98436 NFSv4: Add debugg... |
1665 1666 1667 |
dprintk("%s: exit with error %d for server %s ", __func__, status, clp->cl_hostname); |
2a6ee6aa2 NFSv4: Clean up t... |
1668 1669 1670 |
return status; } set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
cc0a98436 NFSv4: Add debugg... |
1671 1672 1673 |
dprintk("%s: handled error %d for server %s ", __func__, status, clp->cl_hostname); |
2a6ee6aa2 NFSv4: Clean up t... |
1674 1675 |
return 0; } |
b42353ff8 NFSv4.1: Clean up... |
1676 |
static int nfs4_establish_lease(struct nfs_client *clp) |
028600143 NFSv4: Clean up f... |
1677 1678 |
{ struct rpc_cred *cred; |
c48f4f354 NFSv41: Convert t... |
1679 1680 |
const struct nfs4_state_recovery_ops *ops = clp->cl_mvops->reboot_recovery_ops; |
2a6ee6aa2 NFSv4: Clean up t... |
1681 |
int status; |
028600143 NFSv4: Clean up f... |
1682 |
|
90a16617e nfs41: add a get_... |
1683 |
cred = ops->get_clid_cred(clp); |
2a6ee6aa2 NFSv4: Clean up t... |
1684 1685 1686 1687 1688 |
if (cred == NULL) return -ENOENT; status = ops->establish_clid(clp, cred); put_rpccred(cred); if (status != 0) |
b42353ff8 NFSv4.1: Clean up... |
1689 1690 1691 1692 |
return status; pnfs_destroy_all_layouts(clp); return 0; } |
6bbb4ae8f NFS: Clean up nfs... |
1693 1694 1695 1696 |
/* * Returns zero or a negative errno. NFS4ERR values are converted * to local errno values. */ |
b42353ff8 NFSv4.1: Clean up... |
1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 |
static int nfs4_reclaim_lease(struct nfs_client *clp) { int status; status = nfs4_establish_lease(clp); if (status < 0) return nfs4_handle_reclaim_lease_error(clp, status); if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state)) nfs4_state_start_reclaim_nograce(clp); if (!test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); return 0; } static int nfs4_purge_lease(struct nfs_client *clp) { int status; status = nfs4_establish_lease(clp); if (status < 0) |
2a6ee6aa2 NFSv4: Clean up t... |
1719 |
return nfs4_handle_reclaim_lease_error(clp, status); |
b42353ff8 NFSv4.1: Clean up... |
1720 1721 1722 |
clear_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); nfs4_state_start_reclaim_nograce(clp); |
2a6ee6aa2 NFSv4: Clean up t... |
1723 |
return 0; |
028600143 NFSv4: Clean up f... |
1724 |
} |
05f4c350e NFS: Discover NFS... |
1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 |
/** * nfs4_discover_server_trunking - Detect server IP address trunking * * @clp: nfs_client under test * @result: OUT: found nfs_client, or clp * * Returns zero or a negative errno. If zero is returned, * an nfs_client pointer is planted in "result". * * Note: since we are invoked in process context, and * not from inside the state manager, we cannot use * nfs4_handle_reclaim_lease_error(). */ int nfs4_discover_server_trunking(struct nfs_client *clp, struct nfs_client **result) { const struct nfs4_state_recovery_ops *ops = clp->cl_mvops->reboot_recovery_ops; rpc_authflavor_t *flavors, flav, save; struct rpc_clnt *clnt; struct rpc_cred *cred; int i, len, status; dprintk("NFS: %s: testing '%s' ", __func__, clp->cl_hostname); len = NFS_MAX_SECFLAVORS; flavors = kcalloc(len, sizeof(*flavors), GFP_KERNEL); if (flavors == NULL) { status = -ENOMEM; goto out; } len = rpcauth_list_flavors(flavors, len); if (len < 0) { status = len; goto out_free; } clnt = clp->cl_rpcclient; save = clnt->cl_auth->au_flavor; i = 0; mutex_lock(&nfs_clid_init_mutex); status = -ENOENT; again: cred = ops->get_clid_cred(clp); if (cred == NULL) goto out_unlock; status = ops->detect_trunking(clp, result, cred); put_rpccred(cred); switch (status) { case 0: break; case -EACCES: if (clp->cl_machine_cred == NULL) break; /* Handle case where the user hasn't set up machine creds */ nfs4_clear_machine_cred(clp); case -NFS4ERR_DELAY: case -ETIMEDOUT: case -EAGAIN: ssleep(1); dprintk("NFS: %s after status %d, retrying ", __func__, status); goto again; case -NFS4ERR_CLID_INUSE: case -NFS4ERR_WRONGSEC: status = -EPERM; if (i >= len) break; flav = flavors[i++]; if (flav == save) flav = flavors[i++]; clnt = rpc_clone_client_set_auth(clnt, flav); if (IS_ERR(clnt)) { status = PTR_ERR(clnt); break; } clp->cl_rpcclient = clnt; goto again; case -NFS4ERR_MINOR_VERS_MISMATCH: status = -EPROTONOSUPPORT; break; case -EKEYEXPIRED: nfs4_warn_keyexpired(clp->cl_hostname); case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery * in nfs4_exchange_id */ status = -EKEYEXPIRED; } out_unlock: mutex_unlock(&nfs_clid_init_mutex); out_free: kfree(flavors); out: dprintk("NFS: %s: status = %d ", __func__, status); return status; } |
76db6d950 nfs41: add sessio... |
1830 |
#ifdef CONFIG_NFS_V4_1 |
9f594791d NFSv4.1: Handle o... |
1831 |
void nfs4_schedule_session_recovery(struct nfs4_session *session, int err) |
0400a6b0c NFSv4/4.1: Fix nf... |
1832 |
{ |
444f72fe7 NFSv4.1: Fix the ... |
1833 |
struct nfs_client *clp = session->clp; |
9f594791d NFSv4.1: Handle o... |
1834 1835 1836 1837 1838 1839 1840 |
switch (err) { default: set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); break; case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); } |
444f72fe7 NFSv4.1: Fix the ... |
1841 |
nfs4_schedule_lease_recovery(clp); |
0400a6b0c NFSv4/4.1: Fix nf... |
1842 |
} |
cbdabc7f8 NFSv4.1: filelayo... |
1843 |
EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery); |
0400a6b0c NFSv4/4.1: Fix nf... |
1844 |
|
b9efa1b27 nfs41: implement ... |
1845 1846 1847 |
void nfs41_handle_recall_slot(struct nfs_client *clp) { set_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); |
cc0a98436 NFSv4: Add debugg... |
1848 1849 1850 |
dprintk("%s: scheduling slot recall for server %s ", __func__, clp->cl_hostname); |
0400a6b0c NFSv4/4.1: Fix nf... |
1851 |
nfs4_schedule_state_manager(clp); |
b9efa1b27 nfs41: implement ... |
1852 |
} |
0f79fd6f5 NFSv4.1: Various ... |
1853 1854 1855 |
static void nfs4_reset_all_state(struct nfs_client *clp) { if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { |
2c820d9a9 NFS: Force server... |
1856 |
set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
be0bfed00 NFSv4: When purgi... |
1857 |
clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
0f79fd6f5 NFSv4.1: Various ... |
1858 |
nfs4_state_start_reclaim_nograce(clp); |
cc0a98436 NFSv4: Add debugg... |
1859 1860 1861 |
dprintk("%s: scheduling reset of all state for server %s! ", __func__, clp->cl_hostname); |
0400a6b0c NFSv4/4.1: Fix nf... |
1862 |
nfs4_schedule_state_manager(clp); |
0f79fd6f5 NFSv4.1: Various ... |
1863 1864 1865 1866 1867 1868 1869 |
} } static void nfs41_handle_server_reboot(struct nfs_client *clp) { if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { nfs4_state_start_reclaim_reboot(clp); |
cc0a98436 NFSv4: Add debugg... |
1870 1871 1872 |
dprintk("%s: server %s rebooted! ", __func__, clp->cl_hostname); |
0400a6b0c NFSv4/4.1: Fix nf... |
1873 |
nfs4_schedule_state_manager(clp); |
0f79fd6f5 NFSv4.1: Various ... |
1874 1875 1876 1877 1878 |
} } static void nfs41_handle_state_revoked(struct nfs_client *clp) { |
0f79fd6f5 NFSv4.1: Various ... |
1879 |
nfs4_reset_all_state(clp); |
cc0a98436 NFSv4: Add debugg... |
1880 1881 |
dprintk("%s: state revoked on server %s ", __func__, clp->cl_hostname); |
0f79fd6f5 NFSv4.1: Various ... |
1882 1883 1884 1885 1886 1887 |
} static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) { /* This will need to handle layouts too */ nfs_expire_all_delegations(clp); |
cc0a98436 NFSv4: Add debugg... |
1888 1889 1890 |
dprintk("%s: Recallable state revoked on server %s! ", __func__, clp->cl_hostname); |
0f79fd6f5 NFSv4.1: Various ... |
1891 |
} |
a9e64442f nfs41: Use BIND_C... |
1892 |
static void nfs41_handle_backchannel_fault(struct nfs_client *clp) |
0f79fd6f5 NFSv4.1: Various ... |
1893 1894 1895 |
{ nfs_expire_all_delegations(clp); if (test_and_set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) == 0) |
0400a6b0c NFSv4/4.1: Fix nf... |
1896 |
nfs4_schedule_state_manager(clp); |
cc0a98436 NFSv4: Add debugg... |
1897 1898 1899 |
dprintk("%s: server %s declared a backchannel fault ", __func__, clp->cl_hostname); |
0f79fd6f5 NFSv4.1: Various ... |
1900 |
} |
a9e64442f nfs41: Use BIND_C... |
1901 1902 1903 1904 1905 1906 |
static void nfs41_handle_cb_path_down(struct nfs_client *clp) { if (test_and_set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state) == 0) nfs4_schedule_state_manager(clp); } |
0629e370d nfs41: check SEQU... |
1907 1908 1909 1910 |
void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) { if (!flags) return; |
2c820d9a9 NFS: Force server... |
1911 1912 1913 1914 |
dprintk("%s: \"%s\" (client ID %llx) flags=0x%08x ", __func__, clp->cl_hostname, clp->cl_clientid, flags); |
111d489f0 NFSv4.1: Ensure t... |
1915 |
if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
0f79fd6f5 NFSv4.1: Various ... |
1916 |
nfs41_handle_server_reboot(clp); |
111d489f0 NFSv4.1: Ensure t... |
1917 |
if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED | |
0629e370d nfs41: check SEQU... |
1918 1919 |
SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | SEQ4_STATUS_ADMIN_STATE_REVOKED | |
0f79fd6f5 NFSv4.1: Various ... |
1920 1921 |
SEQ4_STATUS_LEASE_MOVED)) nfs41_handle_state_revoked(clp); |
111d489f0 NFSv4.1: Ensure t... |
1922 |
if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) |
0f79fd6f5 NFSv4.1: Various ... |
1923 |
nfs41_handle_recallable_state_revoked(clp); |
a9e64442f nfs41: Use BIND_C... |
1924 1925 1926 1927 |
if (flags & SEQ4_STATUS_BACKCHANNEL_FAULT) nfs41_handle_backchannel_fault(clp); else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) |
0f79fd6f5 NFSv4.1: Various ... |
1928 |
nfs41_handle_cb_path_down(clp); |
0629e370d nfs41: check SEQU... |
1929 |
} |
c3fad1b1a nfs41: add sessio... |
1930 1931 |
static int nfs4_reset_session(struct nfs_client *clp) { |
848f5bda5 NFSv4.1: Ensure w... |
1932 |
struct rpc_cred *cred; |
c3fad1b1a nfs41: add sessio... |
1933 |
int status; |
1a47e7a66 NFSv4.1: Cleanup ... |
1934 1935 |
if (!nfs4_has_session(clp)) return 0; |
380454126 NFSv4: Fix a regr... |
1936 |
nfs4_begin_drain_session(clp); |
848f5bda5 NFSv4.1: Ensure w... |
1937 1938 |
cred = nfs4_get_exchange_id_cred(clp); status = nfs4_proc_destroy_session(clp->cl_session, cred); |
c3fad1b1a nfs41: add sessio... |
1939 1940 |
if (status && status != -NFS4ERR_BADSESSION && status != -NFS4ERR_DEADSESSION) { |
f455848a1 nfs41: Mark state... |
1941 |
status = nfs4_recovery_handle_error(clp, status); |
c3fad1b1a nfs41: add sessio... |
1942 1943 1944 1945 |
goto out; } memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); |
848f5bda5 NFSv4.1: Ensure w... |
1946 |
status = nfs4_proc_create_session(clp, cred); |
41f54a554 nfs41: clear NFS4... |
1947 |
if (status) { |
cc0a98436 NFSv4: Add debugg... |
1948 1949 1950 |
dprintk("%s: session reset failed with status %d for server %s! ", __func__, status, clp->cl_hostname); |
f2c1b5100 NFSv4.1: nfs4_res... |
1951 |
status = nfs4_handle_reclaim_lease_error(clp, status); |
41f54a554 nfs41: clear NFS4... |
1952 1953 |
goto out; } |
bda197f5d NFSv4.1: Ensure w... |
1954 |
nfs41_finish_session_reset(clp); |
cc0a98436 NFSv4: Add debugg... |
1955 1956 1957 |
dprintk("%s: session reset was successful for server %s! ", __func__, clp->cl_hostname); |
41f54a554 nfs41: clear NFS4... |
1958 |
out: |
848f5bda5 NFSv4.1: Ensure w... |
1959 1960 |
if (cred) put_rpccred(cred); |
c3fad1b1a nfs41: add sessio... |
1961 1962 |
return status; } |
76db6d950 nfs41: add sessio... |
1963 |
|
b9efa1b27 nfs41: implement ... |
1964 1965 |
static int nfs4_recall_slot(struct nfs_client *clp) { |
60f00153d NFSv4.1: Clean up... |
1966 |
struct nfs4_slot_table *fc_tbl; |
b9efa1b27 nfs41: implement ... |
1967 1968 |
struct nfs4_slot *new, *old; int i; |
60f00153d NFSv4.1: Clean up... |
1969 1970 |
if (!nfs4_has_session(clp)) return 0; |
b9efa1b27 nfs41: implement ... |
1971 |
nfs4_begin_drain_session(clp); |
60f00153d NFSv4.1: Clean up... |
1972 |
fc_tbl = &clp->cl_session->fc_slot_table; |
b9efa1b27 nfs41: implement ... |
1973 |
new = kmalloc(fc_tbl->target_max_slots * sizeof(struct nfs4_slot), |
8535b2be5 NFSv4: Don't use ... |
1974 |
GFP_NOFS); |
b9efa1b27 nfs41: implement ... |
1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 |
if (!new) return -ENOMEM; spin_lock(&fc_tbl->slot_tbl_lock); for (i = 0; i < fc_tbl->target_max_slots; i++) new[i].seq_nr = fc_tbl->slots[i].seq_nr; old = fc_tbl->slots; fc_tbl->slots = new; fc_tbl->max_slots = fc_tbl->target_max_slots; fc_tbl->target_max_slots = 0; |
60f00153d NFSv4.1: Clean up... |
1985 |
clp->cl_session->fc_attrs.max_reqs = fc_tbl->max_slots; |
b9efa1b27 nfs41: implement ... |
1986 1987 1988 |
spin_unlock(&fc_tbl->slot_tbl_lock); kfree(old); |
b9efa1b27 nfs41: implement ... |
1989 1990 |
return 0; } |
a9e64442f nfs41: Use BIND_C... |
1991 1992 |
static int nfs4_bind_conn_to_session(struct nfs_client *clp) { |
2cf047c99 NFSv4.1: Ensure w... |
1993 1994 |
struct rpc_cred *cred; int ret; |
1a47e7a66 NFSv4.1: Cleanup ... |
1995 1996 |
if (!nfs4_has_session(clp)) return 0; |
43ac544cb NFSv4.1: nfs4_bin... |
1997 |
nfs4_begin_drain_session(clp); |
2cf047c99 NFSv4.1: Ensure w... |
1998 1999 2000 2001 |
cred = nfs4_get_exchange_id_cred(clp); ret = nfs4_proc_bind_conn_to_session(clp, cred); if (cred) put_rpccred(cred); |
43ac544cb NFSv4.1: nfs4_bin... |
2002 |
clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
bf674c822 NFSv4.1: Handle e... |
2003 2004 |
switch (ret) { case 0: |
cc0a98436 NFSv4: Add debugg... |
2005 2006 2007 |
dprintk("%s: bind_conn_to_session was successful for server %s! ", __func__, clp->cl_hostname); |
bf674c822 NFSv4.1: Handle e... |
2008 2009 2010 2011 2012 2013 2014 2015 2016 |
break; case -NFS4ERR_DELAY: ssleep(1); set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); break; default: return nfs4_recovery_handle_error(clp, ret); } return 0; |
a9e64442f nfs41: Use BIND_C... |
2017 |
} |
76db6d950 nfs41: add sessio... |
2018 |
#else /* CONFIG_NFS_V4_1 */ |
c3fad1b1a nfs41: add sessio... |
2019 |
static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
5601a00d6 nfs: run state ma... |
2020 |
static int nfs4_end_drain_session(struct nfs_client *clp) { return 0; } |
b9efa1b27 nfs41: implement ... |
2021 |
static int nfs4_recall_slot(struct nfs_client *clp) { return 0; } |
a9e64442f nfs41: Use BIND_C... |
2022 2023 2024 2025 2026 |
static int nfs4_bind_conn_to_session(struct nfs_client *clp) { return 0; } |
76db6d950 nfs41: add sessio... |
2027 |
#endif /* CONFIG_NFS_V4_1 */ |
e005e8041 NFSv4: Rename the... |
2028 |
static void nfs4_state_manager(struct nfs_client *clp) |
028600143 NFSv4: Clean up f... |
2029 |
{ |
028600143 NFSv4: Clean up f... |
2030 |
int status = 0; |
8ed27d4fb NFS: add more con... |
2031 |
const char *section = "", *section_sep = ""; |
028600143 NFSv4: Clean up f... |
2032 |
|
028600143 NFSv4: Clean up f... |
2033 |
/* Ensure exclusive access to NFSv4 state */ |
47c2199b6 NFSv4.1: Ensure s... |
2034 |
do { |
2c820d9a9 NFS: Force server... |
2035 |
if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { |
8ed27d4fb NFS: add more con... |
2036 |
section = "purge state"; |
b42353ff8 NFSv4.1: Clean up... |
2037 |
status = nfs4_purge_lease(clp); |
2a6ee6aa2 NFSv4: Clean up t... |
2038 2039 |
if (status < 0) goto out_error; |
b42353ff8 NFSv4.1: Clean up... |
2040 |
continue; |
2c820d9a9 NFS: Force server... |
2041 |
} |
b42353ff8 NFSv4.1: Clean up... |
2042 |
if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
8ed27d4fb NFS: add more con... |
2043 |
section = "lease expired"; |
b79a4a1b4 NFSv4: Fix state ... |
2044 2045 |
/* We're going to have to re-establish a clientid */ status = nfs4_reclaim_lease(clp); |
2a6ee6aa2 NFSv4: Clean up t... |
2046 |
if (status < 0) |
b79a4a1b4 NFSv4: Fix state ... |
2047 |
goto out_error; |
b42353ff8 NFSv4.1: Clean up... |
2048 |
continue; |
e598d843c NFSv4: Remove red... |
2049 2050 2051 |
} if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { |
8ed27d4fb NFS: add more con... |
2052 |
section = "check lease"; |
e598d843c NFSv4: Remove red... |
2053 |
status = nfs4_check_lease(clp); |
4f38e4aad NFSv4: Don't erro... |
2054 2055 |
if (status < 0) goto out_error; |
b6d408ba8 NFSv4: Fix up err... |
2056 |
if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
e598d843c NFSv4: Remove red... |
2057 |
continue; |
b79a4a1b4 NFSv4: Fix state ... |
2058 |
} |
b6d408ba8 NFSv4: Fix up err... |
2059 |
|
c3fad1b1a nfs41: add sessio... |
2060 |
/* Initialize or reset the session */ |
1a47e7a66 NFSv4.1: Cleanup ... |
2061 |
if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) { |
8ed27d4fb NFS: add more con... |
2062 |
section = "reset session"; |
4d643d1df nfs41: add create... |
2063 |
status = nfs4_reset_session(clp); |
b6d408ba8 NFSv4: Fix up err... |
2064 2065 2066 |
if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) continue; if (status < 0) |
76db6d950 nfs41: add sessio... |
2067 |
goto out_error; |
76db6d950 nfs41: add sessio... |
2068 |
} |
b6d408ba8 NFSv4: Fix up err... |
2069 |
|
a9e64442f nfs41: Use BIND_C... |
2070 2071 |
/* Send BIND_CONN_TO_SESSION */ if (test_and_clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, |
1a47e7a66 NFSv4.1: Cleanup ... |
2072 |
&clp->cl_state)) { |
8ed27d4fb NFS: add more con... |
2073 |
section = "bind conn to session"; |
a9e64442f nfs41: Use BIND_C... |
2074 2075 2076 |
status = nfs4_bind_conn_to_session(clp); if (status < 0) goto out_error; |
bf674c822 NFSv4.1: Handle e... |
2077 |
continue; |
a9e64442f nfs41: Use BIND_C... |
2078 |
} |
1a2dd948e NFSv4.1: Handle s... |
2079 |
/* Recall session slots */ |
60f00153d NFSv4.1: Clean up... |
2080 |
if (test_and_clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state)) { |
1a2dd948e NFSv4.1: Handle s... |
2081 2082 2083 2084 2085 2086 |
section = "recall slot"; status = nfs4_recall_slot(clp); if (status < 0) goto out_error; continue; } |
b79a4a1b4 NFSv4: Fix state ... |
2087 |
/* First recover reboot state... */ |
e345e88a7 NFSv4: Fix up the... |
2088 |
if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
8ed27d4fb NFS: add more con... |
2089 |
section = "reclaim reboot"; |
591d71cbd nfs41: establish ... |
2090 |
status = nfs4_do_reclaim(clp, |
c48f4f354 NFSv41: Convert t... |
2091 |
clp->cl_mvops->reboot_recovery_ops); |
b6d408ba8 NFSv4: Fix up err... |
2092 |
if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189f nfs41: rename cl_... |
2093 |
test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) |
c3fad1b1a nfs41: add sessio... |
2094 |
continue; |
b79a4a1b4 NFSv4: Fix state ... |
2095 |
nfs4_state_end_reclaim_reboot(clp); |
b6d408ba8 NFSv4: Fix up err... |
2096 2097 2098 2099 |
if (test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) continue; if (status < 0) goto out_error; |
028600143 NFSv4: Clean up f... |
2100 |
} |
b79a4a1b4 NFSv4: Fix state ... |
2101 2102 |
/* Now recover expired state... */ if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { |
8ed27d4fb NFS: add more con... |
2103 |
section = "reclaim nograce"; |
591d71cbd nfs41: establish ... |
2104 |
status = nfs4_do_reclaim(clp, |
c48f4f354 NFSv41: Convert t... |
2105 |
clp->cl_mvops->nograce_recovery_ops); |
b6d408ba8 NFSv4: Fix up err... |
2106 |
if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189f nfs41: rename cl_... |
2107 |
test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) || |
b6d408ba8 NFSv4: Fix up err... |
2108 2109 2110 |
test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) continue; if (status < 0) |
b79a4a1b4 NFSv4: Fix state ... |
2111 |
goto out_error; |
1da177e4c Linux-2.6.12-rc2 |
2112 |
} |
707fb4b32 NFSv4: Clean up N... |
2113 |
|
5601a00d6 nfs: run state ma... |
2114 |
nfs4_end_drain_session(clp); |
707fb4b32 NFSv4: Clean up N... |
2115 2116 2117 2118 |
if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { nfs_client_return_marked_delegations(clp); continue; } |
e005e8041 NFSv4: Rename the... |
2119 2120 |
nfs4_clear_state_manager_bit(clp); |
f3c76491e NFSv4: Don't exit... |
2121 2122 2123 2124 2125 |
/* Did we race with an attempt to give us more work? */ if (clp->cl_state == 0) break; if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) break; |
47c2199b6 NFSv4.1: Ensure s... |
2126 |
} while (atomic_read(&clp->cl_count) > 1); |
e005e8041 NFSv4: Rename the... |
2127 |
return; |
1da177e4c Linux-2.6.12-rc2 |
2128 |
out_error: |
8ed27d4fb NFS: add more con... |
2129 2130 2131 2132 2133 2134 |
if (strlen(section)) section_sep = ": "; pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s" " with error %d ", section_sep, section, clp->cl_hostname, -status); |
ffe5a8300 NFS: Slow down st... |
2135 |
ssleep(1); |
5601a00d6 nfs: run state ma... |
2136 |
nfs4_end_drain_session(clp); |
e005e8041 NFSv4: Rename the... |
2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 |
nfs4_clear_state_manager_bit(clp); } static int nfs4_run_state_manager(void *ptr) { struct nfs_client *clp = ptr; allow_signal(SIGKILL); nfs4_state_manager(clp); nfs_put_client(clp); module_put_and_exit(0); return 0; |
1da177e4c Linux-2.6.12-rc2 |
2149 2150 2151 2152 2153 2154 2155 |
} /* * Local variables: * c-basic-offset: 8 * End: */ |