diff --git a/fs/afs/cmservice.c b/fs/afs/cmservice.c
index 7dcbca3bf828dfcf4c02bd523508ffed7f88834a..7ae88958051f7cc1fcf5a40e4f858d93dc647a51 100644
--- a/fs/afs/cmservice.c
+++ b/fs/afs/cmservice.c
@@ -157,7 +157,7 @@ static int afs_record_cm_probe(struct afs_call *call, struct afs_server *server)
_enter("");
if (test_bit(AFS_SERVER_FL_HAVE_EPOCH, &server->flags) &&
- !test_bit(AFS_SERVER_FL_PROBING, &server->flags)) {
+ !afs_is_probing_server(server)) {
if (server->cm_epoch == call->epoch)
return 0;
diff --git a/fs/afs/fs_probe.c b/fs/afs/fs_probe.c
index d37d78eb84bd5406ed50c98005d38436c9a47cdb..442b5e7944ff28320f63bf4497c15a97603f42ea 100644
--- a/fs/afs/fs_probe.c
+++ b/fs/afs/fs_probe.c
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/* AFS fileserver probing
*
- * Copyright (C) 2018 Red Hat, Inc. All Rights Reserved.
+ * Copyright (C) 2018, 2020 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*/
@@ -11,14 +11,83 @@
#include "internal.h"
#include "protocol_yfs.h"
-static bool afs_fs_probe_done(struct afs_server *server)
+static unsigned int afs_fs_probe_fast_poll_interval = 30 * HZ;
+static unsigned int afs_fs_probe_slow_poll_interval = 5 * 60 * HZ;
+
+/*
+ * Start the probe polling timer. We have to supply it with an inc on the
+ * outstanding server count.
+ */
+static void afs_schedule_fs_probe(struct afs_net *net,
+ struct afs_server *server, bool fast)
+{
+ unsigned long atj;
+
+ if (!net->live)
+ return;
+
+ atj = server->probed_at;
+ atj += fast ? afs_fs_probe_fast_poll_interval : afs_fs_probe_slow_poll_interval;
+
+ afs_inc_servers_outstanding(net);
+ if (timer_reduce(&net->fs_probe_timer, atj))
+ afs_dec_servers_outstanding(net);
+}
+
+/*
+ * Handle the completion of a set of probes.
+ */
+static void afs_finished_fs_probe(struct afs_net *net, struct afs_server *server)
+{
+ bool responded = server->probe.responded;
+
+ write_seqlock(&net->fs_lock);
+ if (responded)
+ list_add_tail(&server->probe_link, &net->fs_probe_slow);
+ else
+ list_add_tail(&server->probe_link, &net->fs_probe_fast);
+ write_sequnlock(&net->fs_lock);
+
+ afs_schedule_fs_probe(net, server, !responded);
+}
+
+/*
+ * Handle the completion of a probe.
+ */
+static void afs_done_one_fs_probe(struct afs_net *net, struct afs_server *server)
+{
+ _enter("");
+
+ if (atomic_dec_and_test(&server->probe_outstanding))
+ afs_finished_fs_probe(net, server);
+
+ wake_up_all(&server->probe_wq);
+}
+
+/*
+ * Handle inability to send a probe due to ENOMEM when trying to allocate a
+ * call struct.
+ */
+static void afs_fs_probe_not_done(struct afs_net *net,
+ struct afs_server *server,
+ struct afs_addr_cursor *ac)
{
- if (!atomic_dec_and_test(&server->probe_outstanding))
- return false;
+ struct afs_addr_list *alist = ac->alist;
+ unsigned int index = ac->index;
+
+ _enter("");
- clear_bit_unlock(AFS_SERVER_FL_PROBING, &server->flags);
- wake_up_bit(&server->flags, AFS_SERVER_FL_PROBING);
- return true;
+ trace_afs_io_error(0, -ENOMEM, afs_io_error_fs_probe_fail);
+ spin_lock(&server->probe_lock);
+
+ server->probe.local_failure = true;
+ if (server->probe.error == 0)
+ server->probe.error = -ENOMEM;
+
+ set_bit(index, &alist->failed);
+
+ spin_unlock(&server->probe_lock);
+ return afs_done_one_fs_probe(net, server);
}
/*
@@ -29,10 +98,8 @@ void afs_fileserver_probe_result(struct afs_call *call)
{
struct afs_addr_list *alist = call->alist;
struct afs_server *server = call->server;
- unsigned int server_index = call->server_index;
unsigned int index = call->addr_ix;
unsigned int rtt_us = 0;
- bool have_result = false;
int ret = call->error;
_enter("%pU,%u", &server->uuid, index);
@@ -51,8 +118,9 @@ void afs_fileserver_probe_result(struct afs_call *call)
goto responded;
case -ENOMEM:
case -ENONET:
+ clear_bit(index, &alist->responded);
server->probe.local_failure = true;
- afs_io_error(call, afs_io_error_fs_probe_fail);
+ trace_afs_io_error(call->debug_id, ret, afs_io_error_fs_probe_fail);
goto out;
case -ECONNRESET: /* Responded, but call expired. */
case -ERFKILL:
@@ -71,12 +139,11 @@ void afs_fileserver_probe_result(struct afs_call *call)
server->probe.error == -ETIMEDOUT ||
server->probe.error == -ETIME))
server->probe.error = ret;
- afs_io_error(call, afs_io_error_fs_probe_fail);
+ trace_afs_io_error(call->debug_id, ret, afs_io_error_fs_probe_fail);
goto out;
}
responded:
- set_bit(index, &alist->responded);
clear_bit(index, &alist->failed);
if (call->service_id == YFS_FS_SERVICE) {
@@ -95,38 +162,31 @@ void afs_fileserver_probe_result(struct afs_call *call)
if (rtt_us < server->probe.rtt) {
server->probe.rtt = rtt_us;
alist->preferred = index;
- have_result = true;
}
smp_wmb(); /* Set rtt before responded. */
server->probe.responded = true;
- set_bit(AFS_SERVER_FL_PROBED, &server->flags);
+ set_bit(index, &alist->responded);
out:
spin_unlock(&server->probe_lock);
- _debug("probe [%u][%u] %pISpc rtt=%u ret=%d",
- server_index, index, &alist->addrs[index].transport, rtt_us, ret);
+ _debug("probe %pU [%u] %pISpc rtt=%u ret=%d",
+ &server->uuid, index, &alist->addrs[index].transport,
+ rtt_us, ret);
- have_result |= afs_fs_probe_done(server);
- if (have_result)
- wake_up_all(&server->probe_wq);
+ return afs_done_one_fs_probe(call->net, server);
}
/*
- * Probe all of a fileserver's addresses to find out the best route and to
- * query its capabilities.
+ * Probe one or all of a fileserver's addresses to find out the best route and
+ * to query its capabilities.
*/
-static int afs_do_probe_fileserver(struct afs_net *net,
- struct afs_server *server,
- struct key *key,
- unsigned int server_index,
- struct afs_error *_e)
+void afs_fs_probe_fileserver(struct afs_net *net, struct afs_server *server,
+ struct key *key, bool all)
{
struct afs_addr_cursor ac = {
.index = 0,
};
- struct afs_call *call;
- bool in_progress = false;
_enter("%pU", &server->uuid);
@@ -136,50 +196,25 @@ static int afs_do_probe_fileserver(struct afs_net *net,
afs_get_addrlist(ac.alist);
read_unlock(&server->fs_lock);
- atomic_set(&server->probe_outstanding, ac.alist->nr_addrs);
+ server->probed_at = jiffies;
+ atomic_set(&server->probe_outstanding, all ? ac.alist->nr_addrs : 1);
memset(&server->probe, 0, sizeof(server->probe));
server->probe.rtt = UINT_MAX;
- for (ac.index = 0; ac.index < ac.alist->nr_addrs; ac.index++) {
- call = afs_fs_get_capabilities(net, server, &ac, key, server_index);
- if (!IS_ERR(call)) {
- afs_put_call(call);
- in_progress = true;
- } else {
- afs_prioritise_error(_e, PTR_ERR(call), ac.abort_code);
- }
- }
-
- if (!in_progress)
- afs_fs_probe_done(server);
- afs_put_addrlist(ac.alist);
- return in_progress;
-}
+ ac.index = ac.alist->preferred;
+ if (ac.index < 0 || ac.index >= ac.alist->nr_addrs)
+ all = true;
-/*
- * Send off probes to all unprobed servers.
- */
-int afs_probe_fileservers(struct afs_net *net, struct key *key,
- struct afs_server_list *list)
-{
- struct afs_server *server;
- struct afs_error e;
- bool in_progress = false;
- int i;
-
- e.error = 0;
- e.responded = false;
- for (i = 0; i < list->nr_servers; i++) {
- server = list->servers[i].server;
- if (test_bit(AFS_SERVER_FL_PROBED, &server->flags))
- continue;
-
- if (!test_and_set_bit_lock(AFS_SERVER_FL_PROBING, &server->flags) &&
- afs_do_probe_fileserver(net, server, key, i, &e))
- in_progress = true;
+ if (all) {
+ for (ac.index = 0; ac.index < ac.alist->nr_addrs; ac.index++)
+ if (!afs_fs_get_capabilities(net, server, &ac, key))
+ afs_fs_probe_not_done(net, server, &ac);
+ } else {
+ if (!afs_fs_get_capabilities(net, server, &ac, key))
+ afs_fs_probe_not_done(net, server, &ac);
}
- return in_progress ? 0 : e.error;
+ afs_put_addrlist(ac.alist);
}
/*
@@ -199,7 +234,7 @@ int afs_wait_for_fs_probes(struct afs_server_list *slist, unsigned long untried)
for (i = 0; i < slist->nr_servers; i++) {
if (test_bit(i, &untried)) {
server = slist->servers[i].server;
- if (!test_bit(AFS_SERVER_FL_PROBING, &server->flags))
+ if (!atomic_read(&server->probe_outstanding))
__clear_bit(i, &untried);
if (server->probe.responded)
have_responders = true;
@@ -229,7 +264,7 @@ int afs_wait_for_fs_probes(struct afs_server_list *slist, unsigned long untried)
server = slist->servers[i].server;
if (server->probe.responded)
goto stop;
- if (test_bit(AFS_SERVER_FL_PROBING, &server->flags))
+ if (atomic_read(&server->probe_outstanding))
still_probing = true;
}
}
@@ -264,3 +299,109 @@ int afs_wait_for_fs_probes(struct afs_server_list *slist, unsigned long untried)
slist->preferred = pref;
return 0;
}
+
+/*
+ * Probe timer. We have an increment on fs_outstanding that we need to pass
+ * along to the work item.
+ */
+void afs_fs_probe_timer(struct timer_list *timer)
+{
+ struct afs_net *net = container_of(timer, struct afs_net, fs_probe_timer);
+
+ if (!queue_work(afs_wq, &net->fs_prober))
+ afs_dec_servers_outstanding(net);
+}
+
+/*
+ * Dispatch a probe to a server.
+ */
+static void afs_dispatch_fs_probe(struct afs_net *net, struct afs_server *server, bool all)
+ __releases(&net->fs_lock)
+{
+ struct key *key = NULL;
+
+ /* We remove it from the queues here - it will be added back to
+ * one of the queues on the completion of the probe.
+ */
+ list_del_init(&server->probe_link);
+
+ afs_get_server(server, afs_server_trace_get_probe);
+ write_sequnlock(&net->fs_lock);
+
+ afs_fs_probe_fileserver(net, server, key, all);
+ afs_put_server(net, server, afs_server_trace_put_probe);
+}
+
+/*
+ * Probe dispatcher to regularly dispatch probes to keep NAT alive.
+ */
+void afs_fs_probe_dispatcher(struct work_struct *work)
+{
+ struct afs_net *net = container_of(work, struct afs_net, fs_prober);
+ struct afs_server *fast, *slow, *server;
+ unsigned long nowj, timer_at, poll_at;
+ bool first_pass = true, set_timer = false;
+
+ if (!net->live)
+ return;
+
+ _enter("");
+
+ if (list_empty(&net->fs_probe_fast) && list_empty(&net->fs_probe_slow)) {
+ _leave(" [none]");
+ return;
+ }
+
+again:
+ write_seqlock(&net->fs_lock);
+
+ fast = slow = server = NULL;
+ nowj = jiffies;
+ timer_at = nowj + MAX_JIFFY_OFFSET;
+
+ if (!list_empty(&net->fs_probe_fast)) {
+ fast = list_first_entry(&net->fs_probe_fast, struct afs_server, probe_link);
+ poll_at = fast->probed_at + afs_fs_probe_fast_poll_interval;
+ if (time_before(nowj, poll_at)) {
+ timer_at = poll_at;
+ set_timer = true;
+ fast = NULL;
+ }
+ }
+
+ if (!list_empty(&net->fs_probe_slow)) {
+ slow = list_first_entry(&net->fs_probe_slow, struct afs_server, probe_link);
+ poll_at = slow->probed_at + afs_fs_probe_slow_poll_interval;
+ if (time_before(nowj, poll_at)) {
+ if (time_before(poll_at, timer_at))
+ timer_at = poll_at;
+ set_timer = true;
+ slow = NULL;
+ }
+ }
+
+ server = fast ?: slow;
+ if (server)
+ _debug("probe %pU", &server->uuid);
+
+ if (server && (first_pass || !need_resched())) {
+ afs_dispatch_fs_probe(net, server, server == fast);
+ first_pass = false;
+ goto again;
+ }
+
+ write_sequnlock(&net->fs_lock);
+
+ if (server) {
+ if (!queue_work(afs_wq, &net->fs_prober))
+ afs_dec_servers_outstanding(net);
+ _leave(" [requeue]");
+ } else if (set_timer) {
+ if (timer_reduce(&net->fs_probe_timer, timer_at))
+ afs_dec_servers_outstanding(net);
+ _leave(" [timer]");
+ } else {
+ afs_dec_servers_outstanding(net);
+ _leave(" [quiesce]");
+ }
+}
diff --git a/fs/afs/fsclient.c b/fs/afs/fsclient.c
index 3854d16e14b18c7e38317b7b361ad92dd0a3e9b2..401de063996c56d510d5882f044a9aa6384bc3ec 100644
--- a/fs/afs/fsclient.c
+++ b/fs/afs/fsclient.c
@@ -1905,14 +1905,13 @@ static const struct afs_call_type afs_RXFSGetCapabilities = {
};
/*
- * Probe a fileserver for the capabilities that it supports. This can
- * return up to 196 words.
- */
-struct afs_call *afs_fs_get_capabilities(struct afs_net *net,
- struct afs_server *server,
- struct afs_addr_cursor *ac,
- struct key *key,
- unsigned int server_index)
+ * Probe a fileserver for the capabilities that it supports. This RPC can
+ * reply with up to 196 words. The operation is asynchronous and if we managed
+ * to allocate a call, true is returned the result is delivered through the
+ * ->done() - otherwise we return false to indicate we didn't even try.
+ */
+bool afs_fs_get_capabilities(struct afs_net *net, struct afs_server *server,
+ struct afs_addr_cursor *ac, struct key *key)
{
struct afs_call *call;
__be32 *bp;
@@ -1921,11 +1920,10 @@ struct afs_call *afs_fs_get_capabilities(struct afs_net *net,
call = afs_alloc_flat_call(net, &afs_RXFSGetCapabilities, 1 * 4, 16 * 4);
if (!call)
- return ERR_PTR(-ENOMEM);
+ return false;
call->key = key;
call->server = afs_use_server(server, afs_server_trace_get_caps);
- call->server_index = server_index;
call->upgrade = true;
call->async = true;
call->max_lifespan = AFS_PROBE_MAX_LIFESPAN;
@@ -1936,7 +1934,8 @@ struct afs_call *afs_fs_get_capabilities(struct afs_net *net,
trace_afs_make_fs_call(call, NULL);
afs_make_call(ac, call, GFP_NOFS);
- return call;
+ afs_put_call(call);
+ return true;
}
/*
diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index cb70e1c234cc37f8faf55b6867a4ff54ecb38f05..61320a632e15faa40e979bb2b1a65455fd8ef694 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -90,7 +90,6 @@ struct afs_addr_list {
unsigned char nr_ipv4; /* Number of IPv4 addresses */
enum dns_record_source source:8;
enum dns_lookup_status status:8;
- unsigned long probed; /* Mask of servers that have been probed */
unsigned long failed; /* Mask of addrs that failed locally/ICMP */
unsigned long responded; /* Mask of addrs that responded */
struct sockaddr_rxrpc addrs[];
@@ -299,9 +298,10 @@ struct afs_net {
* cell, but in practice, people create aliases and subsets and there's
* no easy way to distinguish them.
*/
- seqlock_t fs_lock; /* For fs_servers */
+ seqlock_t fs_lock; /* For fs_servers, fs_probe_*, fs_proc */
struct rb_root fs_servers; /* afs_server (by server UUID or address) */
- struct list_head fs_updates; /* afs_server (by update_at) */
+ struct list_head fs_probe_fast; /* List of afs_server to probe at 30s intervals */
+ struct list_head fs_probe_slow; /* List of afs_server to probe at 5m intervals */
struct hlist_head fs_proc; /* procfs servers list */
struct hlist_head fs_addresses4; /* afs_server (by lowest IPv4 addr) */
@@ -310,6 +310,9 @@ struct afs_net {
struct work_struct fs_manager;
struct timer_list fs_timer;
+
+ struct work_struct fs_prober;
+ struct timer_list fs_probe_timer;
atomic_t servers_outstanding;
/* File locking renewal management */
@@ -493,7 +496,8 @@ struct afs_server {
};
struct afs_addr_list __rcu *addresses;
- struct rb_node uuid_rb; /* Link in net->servers */
+ struct rb_node uuid_rb; /* Link in net->fs_servers */
+ struct list_head probe_link; /* Link in net->fs_probe_list */
struct hlist_node addr4_link; /* Link in net->fs_addresses4 */
struct hlist_node addr6_link; /* Link in net->fs_addresses6 */
struct hlist_node proc_link; /* Link in net->fs_proc */
@@ -504,8 +508,6 @@ struct afs_server {
#define AFS_SERVER_FL_NOT_FOUND 2 /* VL server says no such server */
#define AFS_SERVER_FL_VL_FAIL 3 /* Failed to access VL server */
#define AFS_SERVER_FL_UPDATING 4
-#define AFS_SERVER_FL_PROBED 5 /* The fileserver has been probed */
-#define AFS_SERVER_FL_PROBING 6 /* Fileserver is being probed */
#define AFS_SERVER_FL_NO_IBULK 7 /* Fileserver doesn't support FS.InlineBulkStatus */
#define AFS_SERVER_FL_MAY_HAVE_CB 8 /* May have callbacks on this fileserver */
#define AFS_SERVER_FL_IS_YFS 9 /* Server is YFS not AFS */
@@ -527,6 +529,7 @@ struct afs_server {
rwlock_t cb_break_lock; /* Volume finding lock */
/* Probe state */
+ unsigned long probed_at; /* Time last probe was dispatched (jiffies) */
wait_queue_head_t probe_wq;
atomic_t probe_outstanding;
spinlock_t probe_lock;
@@ -956,7 +959,6 @@ extern int afs_flock(struct file *, int, struct file_lock *);
*/
extern int afs_fs_fetch_file_status(struct afs_fs_cursor *, struct afs_status_cb *,
struct afs_volsync *);
-extern int afs_fs_give_up_callbacks(struct afs_net *, struct afs_server *);
extern int afs_fs_fetch_data(struct afs_fs_cursor *, struct afs_status_cb *, struct afs_read *);
extern int afs_fs_create(struct afs_fs_cursor *, const char *, umode_t,
struct afs_status_cb *, struct afs_fid *, struct afs_status_cb *);
@@ -978,9 +980,8 @@ extern int afs_fs_extend_lock(struct afs_fs_cursor *, struct afs_status_cb *);
extern int afs_fs_release_lock(struct afs_fs_cursor *, struct afs_status_cb *);
extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *,
struct afs_addr_cursor *, struct key *);
-extern struct afs_call *afs_fs_get_capabilities(struct afs_net *, struct afs_server *,
- struct afs_addr_cursor *, struct key *,
- unsigned int);
+extern bool afs_fs_get_capabilities(struct afs_net *, struct afs_server *,
+ struct afs_addr_cursor *, struct key *);
extern int afs_fs_inline_bulk_status(struct afs_fs_cursor *, struct afs_net *,
struct afs_fid *, struct afs_status_cb *,
unsigned int, struct afs_volsync *);
@@ -1001,8 +1002,9 @@ extern int afs_fs_store_acl(struct afs_fs_cursor *, const struct afs_acl *,
* fs_probe.c
*/
extern void afs_fileserver_probe_result(struct afs_call *);
-extern int afs_probe_fileservers(struct afs_net *, struct key *, struct afs_server_list *);
+extern void afs_fs_probe_fileserver(struct afs_net *, struct afs_server *, struct key *, bool);
extern int afs_wait_for_fs_probes(struct afs_server_list *, unsigned long);
+extern void afs_fs_probe_dispatcher(struct work_struct *);
/*
* inode.c
@@ -1251,9 +1253,26 @@ extern void afs_unuse_server_notime(struct afs_net *, struct afs_server *, enum
extern void afs_put_server(struct afs_net *, struct afs_server *, enum afs_server_trace);
extern void afs_manage_servers(struct work_struct *);
extern void afs_servers_timer(struct timer_list *);
+extern void afs_fs_probe_timer(struct timer_list *);
extern void __net_exit afs_purge_servers(struct afs_net *);
extern bool afs_check_server_record(struct afs_fs_cursor *, struct afs_server *);
+static inline void afs_inc_servers_outstanding(struct afs_net *net)
+{
+ atomic_inc(&net->servers_outstanding);
+}
+
+static inline void afs_dec_servers_outstanding(struct afs_net *net)
+{
+ if (atomic_dec_and_test(&net->servers_outstanding))
+ wake_up_var(&net->servers_outstanding);
+}
+
+static inline bool afs_is_probing_server(struct afs_server *server)
+{
+ return list_empty(&server->probe_link);
+}
+
/*
* server_list.c
*/
diff --git a/fs/afs/main.c b/fs/afs/main.c
index c9c45d7078bd184bc85417783160c9cb813f0222..56b52f8dbf1507192ff60b2b02776c2518859d64 100644
--- a/fs/afs/main.c
+++ b/fs/afs/main.c
@@ -87,7 +87,8 @@ static int __net_init afs_net_init(struct net *net_ns)
seqlock_init(&net->fs_lock);
net->fs_servers = RB_ROOT;
- INIT_LIST_HEAD(&net->fs_updates);
+ INIT_LIST_HEAD(&net->fs_probe_fast);
+ INIT_LIST_HEAD(&net->fs_probe_slow);
INIT_HLIST_HEAD(&net->fs_proc);
INIT_HLIST_HEAD(&net->fs_addresses4);
@@ -96,6 +97,8 @@ static int __net_init afs_net_init(struct net *net_ns)
INIT_WORK(&net->fs_manager, afs_manage_servers);
timer_setup(&net->fs_timer, afs_servers_timer, 0);
+ INIT_WORK(&net->fs_prober, afs_fs_probe_dispatcher);
+ timer_setup(&net->fs_probe_timer, afs_fs_probe_timer, 0);
ret = -ENOMEM;
sysnames = kzalloc(sizeof(*sysnames), GFP_KERNEL);
diff --git a/fs/afs/rotate.c b/fs/afs/rotate.c
index 2a3305e42b145cc1a5ea336092793a302c79ee4a..46b68da89faa253197cab78d091058e68708589d 100644
--- a/fs/afs/rotate.c
+++ b/fs/afs/rotate.c
@@ -349,9 +349,6 @@ bool afs_select_fileserver(struct afs_fs_cursor *fc)
goto failed;
_debug("__ VOL %llx __", vnode->volume->vid);
- error = afs_probe_fileservers(afs_v2net(vnode), fc->key, fc->server_list);
- if (error < 0)
- goto failed_set_error;
pick_server:
_debug("pick [%lx]", fc->untried);
@@ -596,8 +593,8 @@ static void afs_dump_edestaddrreq(const struct afs_fs_cursor *fc)
a->version,
a->nr_ipv4, a->nr_addrs, a->max_addrs,
a->preferred);
- pr_notice("FC: - pr=%lx R=%lx F=%lx\n",
- a->probed, a->responded, a->failed);
+ pr_notice("FC: - R=%lx F=%lx\n",
+ a->responded, a->failed);
if (a == fc->ac.alist)
pr_notice("FC: - current\n");
}
diff --git a/fs/afs/server.c b/fs/afs/server.c
index 4969a681f8f5c5cd30617f890eafa487f5916e91..3f707b5ecb625e43646d03e231fb8a90714be34c 100644
--- a/fs/afs/server.c
+++ b/fs/afs/server.c
@@ -14,17 +14,6 @@
static unsigned afs_server_gc_delay = 10; /* Server record timeout in seconds */
static atomic_t afs_server_debug_id;
-static void afs_inc_servers_outstanding(struct afs_net *net)
-{
- atomic_inc(&net->servers_outstanding);
-}
-
-static void afs_dec_servers_outstanding(struct afs_net *net)
-{
- if (atomic_dec_and_test(&net->servers_outstanding))
- wake_up_var(&net->servers_outstanding);
-}
-
static struct afs_server *afs_maybe_use_server(struct afs_server *,
enum afs_server_trace);
static void __afs_put_server(struct afs_net *, struct afs_server *);
@@ -226,6 +215,7 @@ static struct afs_server *afs_alloc_server(struct afs_net *net,
INIT_HLIST_HEAD(&server->cb_volumes);
rwlock_init(&server->cb_break_lock);
init_waitqueue_head(&server->probe_wq);
+ INIT_LIST_HEAD(&server->probe_link);
spin_lock_init(&server->probe_lock);
afs_inc_servers_outstanding(net);
@@ -295,6 +285,12 @@ struct afs_server *afs_lookup_server(struct afs_cell *cell, struct key *key,
if (server != candidate) {
afs_put_addrlist(alist);
kfree(candidate);
+ } else {
+ /* Immediately dispatch an asynchronous probe to each interface
+ * on the fileserver. This will make sure the repeat-probing
+ * service is started.
+ */
+ afs_fs_probe_fileserver(cell->net, server, key, true);
}
return server;
@@ -464,6 +460,7 @@ static void afs_gc_servers(struct afs_net *net, struct afs_server *gc_list)
trace_afs_server(server, atomic_read(&server->ref),
active, afs_server_trace_gc);
rb_erase(&server->uuid_rb, &net->fs_servers);
+ list_del(&server->probe_link);
hlist_del_rcu(&server->proc_link);
if (!hlist_unhashed(&server->addr4_link))
hlist_del_rcu(&server->addr4_link);
diff --git a/fs/afs/volume.c b/fs/afs/volume.c
index 4310336b9bb8c10543c0157950d4b19d2a4d0eab..249000195f8ab07accb1b4df863cabf69af45a73 100644
--- a/fs/afs/volume.c
+++ b/fs/afs/volume.c
@@ -266,7 +266,6 @@ static int afs_update_volume_status(struct afs_volume *volume, struct key *key)
}
volume->update_at = ktime_get_real_seconds() + afs_volume_record_life;
- clear_bit(AFS_VOLUME_NEEDS_UPDATE, &volume->flags);
write_unlock(&volume->servers_lock);
ret = 0;
@@ -283,23 +282,25 @@ static int afs_update_volume_status(struct afs_volume *volume, struct key *key)
*/
int afs_check_volume_status(struct afs_volume *volume, struct afs_fs_cursor *fc)
{
- time64_t now = ktime_get_real_seconds();
int ret, retries = 0;
_enter("");
- if (volume->update_at <= now)
- set_bit(AFS_VOLUME_NEEDS_UPDATE, &volume->flags);
-
retry:
- if (!test_bit(AFS_VOLUME_NEEDS_UPDATE, &volume->flags) &&
- !test_bit(AFS_VOLUME_WAIT, &volume->flags)) {
- _leave(" = 0");
- return 0;
- }
-
+ if (test_bit(AFS_VOLUME_WAIT, &volume->flags))
+ goto wait;
+ if (volume->update_at <= ktime_get_real_seconds() ||
+ test_bit(AFS_VOLUME_NEEDS_UPDATE, &volume->flags))
+ goto update;
+ _leave(" = 0");
+ return 0;
+
+update:
if (!test_and_set_bit_lock(AFS_VOLUME_UPDATING, &volume->flags)) {
+ clear_bit(AFS_VOLUME_NEEDS_UPDATE, &volume->flags);
ret = afs_update_volume_status(volume, fc->key);
+ if (ret < 0)
+ set_bit(AFS_VOLUME_NEEDS_UPDATE, &volume->flags);
clear_bit_unlock(AFS_VOLUME_WAIT, &volume->flags);
clear_bit_unlock(AFS_VOLUME_UPDATING, &volume->flags);
wake_up_bit(&volume->flags, AFS_VOLUME_WAIT);
@@ -307,6 +308,7 @@ int afs_check_volume_status(struct afs_volume *volume, struct afs_fs_cursor *fc)
return ret;
}
+wait:
if (!test_bit(AFS_VOLUME_WAIT, &volume->flags)) {
_leave(" = 0 [no wait]");
return 0;
diff --git a/include/trace/events/afs.h b/include/trace/events/afs.h
index f9691f69b2d68f742e14309487ea9c02c51d839a..19a07fbf35df03b270f1883aa837a92f6d46a2f8 100644
--- a/include/trace/events/afs.h
+++ b/include/trace/events/afs.h
@@ -38,10 +38,12 @@ enum afs_server_trace {
afs_server_trace_get_caps,
afs_server_trace_get_install,
afs_server_trace_get_new_cbi,
+ afs_server_trace_get_probe,
afs_server_trace_give_up_cb,
afs_server_trace_put_call,
afs_server_trace_put_cbi,
afs_server_trace_put_find_rsq,
+ afs_server_trace_put_probe,
afs_server_trace_put_slist,
afs_server_trace_put_slist_isort,
afs_server_trace_put_uuid_rsq,
@@ -247,10 +249,12 @@ enum afs_cb_break_reason {
EM(afs_server_trace_get_caps, "GET caps ") \
EM(afs_server_trace_get_install, "GET inst ") \
EM(afs_server_trace_get_new_cbi, "GET cbi ") \
+ EM(afs_server_trace_get_probe, "GET probe") \
EM(afs_server_trace_give_up_cb, "giveup-cb") \
EM(afs_server_trace_put_call, "PUT call ") \
EM(afs_server_trace_put_cbi, "PUT cbi ") \
EM(afs_server_trace_put_find_rsq, "PUT f-rsq") \
+ EM(afs_server_trace_put_probe, "PUT probe") \
EM(afs_server_trace_put_slist, "PUT slist") \
EM(afs_server_trace_put_slist_isort, "PUT isort") \
EM(afs_server_trace_put_uuid_rsq, "PUT u-req") \