mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 08:19:28 +00:00
![David Howells](/assets/img/avatar_default.png)
Send probes to all the unprobed fileservers in a fileserver list on all addresses simultaneously in an attempt to find out the fastest route whilst not getting stuck for 20s on any server or address that we don't get a reply from. This alleviates the problem whereby attempting to access a new server can take a long time because the rotation algorithm ends up rotating through all servers and addresses until it finds one that responds. Signed-off-by: David Howells <dhowells@redhat.com>
650 lines
16 KiB
C
650 lines
16 KiB
C
/* Handle fileserver selection and rotation.
|
|
*
|
|
* Copyright (C) 2017 Red Hat, Inc. All Rights Reserved.
|
|
* Written by David Howells (dhowells@redhat.com)
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public Licence
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the Licence, or (at your option) any later version.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/sched/signal.h>
|
|
#include "internal.h"
|
|
#include "afs_fs.h"
|
|
|
|
/*
|
|
* Begin an operation on the fileserver.
|
|
*
|
|
* Fileserver operations are serialised on the server by vnode, so we serialise
|
|
* them here also using the io_lock.
|
|
*/
|
|
bool afs_begin_vnode_operation(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
|
|
struct key *key)
|
|
{
|
|
memset(fc, 0, sizeof(*fc));
|
|
fc->vnode = vnode;
|
|
fc->key = key;
|
|
fc->ac.error = SHRT_MAX;
|
|
fc->error = -EDESTADDRREQ;
|
|
|
|
if (mutex_lock_interruptible(&vnode->io_lock) < 0) {
|
|
fc->error = -EINTR;
|
|
fc->flags |= AFS_FS_CURSOR_STOP;
|
|
return false;
|
|
}
|
|
|
|
if (vnode->lock_state != AFS_VNODE_LOCK_NONE)
|
|
fc->flags |= AFS_FS_CURSOR_CUR_ONLY;
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* Begin iteration through a server list, starting with the vnode's last used
|
|
* server if possible, or the last recorded good server if not.
|
|
*/
|
|
static bool afs_start_fs_iteration(struct afs_fs_cursor *fc,
|
|
struct afs_vnode *vnode)
|
|
{
|
|
struct afs_cb_interest *cbi;
|
|
int i;
|
|
|
|
read_lock(&vnode->volume->servers_lock);
|
|
fc->server_list = afs_get_serverlist(vnode->volume->servers);
|
|
read_unlock(&vnode->volume->servers_lock);
|
|
|
|
fc->untried = (1UL << fc->server_list->nr_servers) - 1;
|
|
fc->index = READ_ONCE(fc->server_list->preferred);
|
|
|
|
cbi = vnode->cb_interest;
|
|
if (cbi) {
|
|
/* See if the vnode's preferred record is still available */
|
|
for (i = 0; i < fc->server_list->nr_servers; i++) {
|
|
if (fc->server_list->servers[i].cb_interest == cbi) {
|
|
fc->index = i;
|
|
goto found_interest;
|
|
}
|
|
}
|
|
|
|
/* If we have a lock outstanding on a server that's no longer
|
|
* serving this vnode, then we can't switch to another server
|
|
* and have to return an error.
|
|
*/
|
|
if (fc->flags & AFS_FS_CURSOR_CUR_ONLY) {
|
|
fc->error = -ESTALE;
|
|
return false;
|
|
}
|
|
|
|
/* Note that the callback promise is effectively broken */
|
|
write_seqlock(&vnode->cb_lock);
|
|
ASSERTCMP(cbi, ==, vnode->cb_interest);
|
|
vnode->cb_interest = NULL;
|
|
if (test_and_clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags))
|
|
vnode->cb_break++;
|
|
write_sequnlock(&vnode->cb_lock);
|
|
|
|
afs_put_cb_interest(afs_v2net(vnode), cbi);
|
|
cbi = NULL;
|
|
}
|
|
|
|
found_interest:
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* Post volume busy note.
|
|
*/
|
|
static void afs_busy(struct afs_volume *volume, u32 abort_code)
|
|
{
|
|
const char *m;
|
|
|
|
switch (abort_code) {
|
|
case VOFFLINE: m = "offline"; break;
|
|
case VRESTARTING: m = "restarting"; break;
|
|
case VSALVAGING: m = "being salvaged"; break;
|
|
default: m = "busy"; break;
|
|
}
|
|
|
|
pr_notice("kAFS: Volume %llu '%s' is %s\n", volume->vid, volume->name, m);
|
|
}
|
|
|
|
/*
|
|
* Sleep and retry the operation to the same fileserver.
|
|
*/
|
|
static bool afs_sleep_and_retry(struct afs_fs_cursor *fc)
|
|
{
|
|
msleep_interruptible(1000);
|
|
if (signal_pending(current)) {
|
|
fc->error = -ERESTARTSYS;
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* Select the fileserver to use. May be called multiple times to rotate
|
|
* through the fileservers.
|
|
*/
|
|
bool afs_select_fileserver(struct afs_fs_cursor *fc)
|
|
{
|
|
struct afs_addr_list *alist;
|
|
struct afs_server *server;
|
|
struct afs_vnode *vnode = fc->vnode;
|
|
u32 rtt, abort_code;
|
|
int error = fc->ac.error, i;
|
|
|
|
_enter("%lx[%d],%lx[%d],%d,%d",
|
|
fc->untried, fc->index,
|
|
fc->ac.tried, fc->ac.index,
|
|
error, fc->ac.abort_code);
|
|
|
|
if (fc->flags & AFS_FS_CURSOR_STOP) {
|
|
_leave(" = f [stopped]");
|
|
return false;
|
|
}
|
|
|
|
fc->nr_iterations++;
|
|
|
|
/* Evaluate the result of the previous operation, if there was one. */
|
|
switch (error) {
|
|
case SHRT_MAX:
|
|
goto start;
|
|
|
|
case 0:
|
|
default:
|
|
/* Success or local failure. Stop. */
|
|
fc->error = error;
|
|
fc->flags |= AFS_FS_CURSOR_STOP;
|
|
_leave(" = f [okay/local %d]", error);
|
|
return false;
|
|
|
|
case -ECONNABORTED:
|
|
/* The far side rejected the operation on some grounds. This
|
|
* might involve the server being busy or the volume having been moved.
|
|
*/
|
|
switch (fc->ac.abort_code) {
|
|
case VNOVOL:
|
|
/* This fileserver doesn't know about the volume.
|
|
* - May indicate that the VL is wrong - retry once and compare
|
|
* the results.
|
|
* - May indicate that the fileserver couldn't attach to the vol.
|
|
*/
|
|
if (fc->flags & AFS_FS_CURSOR_VNOVOL) {
|
|
fc->error = -EREMOTEIO;
|
|
goto next_server;
|
|
}
|
|
|
|
write_lock(&vnode->volume->servers_lock);
|
|
fc->server_list->vnovol_mask |= 1 << fc->index;
|
|
write_unlock(&vnode->volume->servers_lock);
|
|
|
|
set_bit(AFS_VOLUME_NEEDS_UPDATE, &vnode->volume->flags);
|
|
error = afs_check_volume_status(vnode->volume, fc->key);
|
|
if (error < 0)
|
|
goto failed_set_error;
|
|
|
|
if (test_bit(AFS_VOLUME_DELETED, &vnode->volume->flags)) {
|
|
fc->error = -ENOMEDIUM;
|
|
goto failed;
|
|
}
|
|
|
|
/* If the server list didn't change, then assume that
|
|
* it's the fileserver having trouble.
|
|
*/
|
|
if (vnode->volume->servers == fc->server_list) {
|
|
fc->error = -EREMOTEIO;
|
|
goto next_server;
|
|
}
|
|
|
|
/* Try again */
|
|
fc->flags |= AFS_FS_CURSOR_VNOVOL;
|
|
_leave(" = t [vnovol]");
|
|
return true;
|
|
|
|
case VSALVAGE: /* TODO: Should this return an error or iterate? */
|
|
case VVOLEXISTS:
|
|
case VNOSERVICE:
|
|
case VONLINE:
|
|
case VDISKFULL:
|
|
case VOVERQUOTA:
|
|
fc->error = afs_abort_to_error(fc->ac.abort_code);
|
|
goto next_server;
|
|
|
|
case VOFFLINE:
|
|
if (!test_and_set_bit(AFS_VOLUME_OFFLINE, &vnode->volume->flags)) {
|
|
afs_busy(vnode->volume, fc->ac.abort_code);
|
|
clear_bit(AFS_VOLUME_BUSY, &vnode->volume->flags);
|
|
}
|
|
if (fc->flags & AFS_FS_CURSOR_NO_VSLEEP) {
|
|
fc->error = -EADV;
|
|
goto failed;
|
|
}
|
|
if (fc->flags & AFS_FS_CURSOR_CUR_ONLY) {
|
|
fc->error = -ESTALE;
|
|
goto failed;
|
|
}
|
|
goto busy;
|
|
|
|
case VSALVAGING:
|
|
case VRESTARTING:
|
|
case VBUSY:
|
|
/* Retry after going round all the servers unless we
|
|
* have a file lock we need to maintain.
|
|
*/
|
|
if (fc->flags & AFS_FS_CURSOR_NO_VSLEEP) {
|
|
fc->error = -EBUSY;
|
|
goto failed;
|
|
}
|
|
if (!test_and_set_bit(AFS_VOLUME_BUSY, &vnode->volume->flags)) {
|
|
afs_busy(vnode->volume, fc->ac.abort_code);
|
|
clear_bit(AFS_VOLUME_OFFLINE, &vnode->volume->flags);
|
|
}
|
|
busy:
|
|
if (fc->flags & AFS_FS_CURSOR_CUR_ONLY) {
|
|
if (!afs_sleep_and_retry(fc))
|
|
goto failed;
|
|
|
|
/* Retry with same server & address */
|
|
_leave(" = t [vbusy]");
|
|
return true;
|
|
}
|
|
|
|
fc->flags |= AFS_FS_CURSOR_VBUSY;
|
|
goto next_server;
|
|
|
|
case VMOVED:
|
|
/* The volume migrated to another server. We consider
|
|
* consider all locks and callbacks broken and request
|
|
* an update from the VLDB.
|
|
*
|
|
* We also limit the number of VMOVED hops we will
|
|
* honour, just in case someone sets up a loop.
|
|
*/
|
|
if (fc->flags & AFS_FS_CURSOR_VMOVED) {
|
|
fc->error = -EREMOTEIO;
|
|
goto failed;
|
|
}
|
|
fc->flags |= AFS_FS_CURSOR_VMOVED;
|
|
|
|
set_bit(AFS_VOLUME_WAIT, &vnode->volume->flags);
|
|
set_bit(AFS_VOLUME_NEEDS_UPDATE, &vnode->volume->flags);
|
|
error = afs_check_volume_status(vnode->volume, fc->key);
|
|
if (error < 0)
|
|
goto failed_set_error;
|
|
|
|
/* If the server list didn't change, then the VLDB is
|
|
* out of sync with the fileservers. This is hopefully
|
|
* a temporary condition, however, so we don't want to
|
|
* permanently block access to the file.
|
|
*
|
|
* TODO: Try other fileservers if we can.
|
|
*
|
|
* TODO: Retry a few times with sleeps.
|
|
*/
|
|
if (vnode->volume->servers == fc->server_list) {
|
|
fc->error = -ENOMEDIUM;
|
|
goto failed;
|
|
}
|
|
|
|
goto restart_from_beginning;
|
|
|
|
default:
|
|
clear_bit(AFS_VOLUME_OFFLINE, &vnode->volume->flags);
|
|
clear_bit(AFS_VOLUME_BUSY, &vnode->volume->flags);
|
|
fc->error = afs_abort_to_error(fc->ac.abort_code);
|
|
goto failed;
|
|
}
|
|
|
|
case -ETIMEDOUT:
|
|
case -ETIME:
|
|
if (fc->error != -EDESTADDRREQ)
|
|
goto iterate_address;
|
|
/* Fall through */
|
|
case -ENETUNREACH:
|
|
case -EHOSTUNREACH:
|
|
case -ECONNREFUSED:
|
|
_debug("no conn");
|
|
fc->error = error;
|
|
goto iterate_address;
|
|
|
|
case -ECONNRESET:
|
|
_debug("call reset");
|
|
fc->error = error;
|
|
goto failed;
|
|
}
|
|
|
|
restart_from_beginning:
|
|
_debug("restart");
|
|
afs_end_cursor(&fc->ac);
|
|
afs_put_cb_interest(afs_v2net(vnode), fc->cbi);
|
|
fc->cbi = NULL;
|
|
afs_put_serverlist(afs_v2net(vnode), fc->server_list);
|
|
fc->server_list = NULL;
|
|
start:
|
|
_debug("start");
|
|
/* See if we need to do an update of the volume record. Note that the
|
|
* volume may have moved or even have been deleted.
|
|
*/
|
|
error = afs_check_volume_status(vnode->volume, fc->key);
|
|
if (error < 0)
|
|
goto failed_set_error;
|
|
|
|
if (!afs_start_fs_iteration(fc, vnode))
|
|
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);
|
|
|
|
error = afs_wait_for_fs_probes(fc->server_list, fc->untried);
|
|
if (error < 0)
|
|
goto failed_set_error;
|
|
|
|
/* Pick the untried server with the lowest RTT. If we have outstanding
|
|
* callbacks, we stick with the server we're already using if we can.
|
|
*/
|
|
if (fc->cbi) {
|
|
_debug("cbi %u", fc->index);
|
|
if (test_bit(fc->index, &fc->untried))
|
|
goto selected_server;
|
|
afs_put_cb_interest(afs_v2net(vnode), fc->cbi);
|
|
fc->cbi = NULL;
|
|
_debug("nocbi");
|
|
}
|
|
|
|
fc->index = -1;
|
|
rtt = U32_MAX;
|
|
for (i = 0; i < fc->server_list->nr_servers; i++) {
|
|
struct afs_server *s = fc->server_list->servers[i].server;
|
|
|
|
if (!test_bit(i, &fc->untried) || !s->probe.responded)
|
|
continue;
|
|
if (s->probe.rtt < rtt) {
|
|
fc->index = i;
|
|
rtt = s->probe.rtt;
|
|
}
|
|
}
|
|
|
|
if (fc->index == -1)
|
|
goto no_more_servers;
|
|
|
|
selected_server:
|
|
_debug("use %d", fc->index);
|
|
__clear_bit(fc->index, &fc->untried);
|
|
|
|
/* We're starting on a different fileserver from the list. We need to
|
|
* check it, create a callback intercept, find its address list and
|
|
* probe its capabilities before we use it.
|
|
*/
|
|
ASSERTCMP(fc->ac.alist, ==, NULL);
|
|
server = fc->server_list->servers[fc->index].server;
|
|
|
|
if (!afs_check_server_record(fc, server))
|
|
goto failed;
|
|
|
|
_debug("USING SERVER: %pU", &server->uuid);
|
|
|
|
/* Make sure we've got a callback interest record for this server. We
|
|
* have to link it in before we send the request as we can be sent a
|
|
* break request before we've finished decoding the reply and
|
|
* installing the vnode.
|
|
*/
|
|
error = afs_register_server_cb_interest(vnode, fc->server_list,
|
|
fc->index);
|
|
if (error < 0)
|
|
goto failed_set_error;
|
|
|
|
fc->cbi = afs_get_cb_interest(vnode->cb_interest);
|
|
|
|
read_lock(&server->fs_lock);
|
|
alist = rcu_dereference_protected(server->addresses,
|
|
lockdep_is_held(&server->fs_lock));
|
|
afs_get_addrlist(alist);
|
|
read_unlock(&server->fs_lock);
|
|
|
|
memset(&fc->ac, 0, sizeof(fc->ac));
|
|
|
|
if (!fc->ac.alist)
|
|
fc->ac.alist = alist;
|
|
else
|
|
afs_put_addrlist(alist);
|
|
|
|
fc->ac.index = -1;
|
|
|
|
iterate_address:
|
|
ASSERT(fc->ac.alist);
|
|
/* Iterate over the current server's address list to try and find an
|
|
* address on which it will respond to us.
|
|
*/
|
|
if (!afs_iterate_addresses(&fc->ac))
|
|
goto next_server;
|
|
|
|
_debug("address [%u] %u/%u", fc->index, fc->ac.index, fc->ac.alist->nr_addrs);
|
|
|
|
_leave(" = t");
|
|
return true;
|
|
|
|
next_server:
|
|
_debug("next");
|
|
afs_end_cursor(&fc->ac);
|
|
goto pick_server;
|
|
|
|
no_more_servers:
|
|
/* That's all the servers poked to no good effect. Try again if some
|
|
* of them were busy.
|
|
*/
|
|
if (fc->flags & AFS_FS_CURSOR_VBUSY)
|
|
goto restart_from_beginning;
|
|
|
|
abort_code = 0;
|
|
error = -EDESTADDRREQ;
|
|
for (i = 0; i < fc->server_list->nr_servers; i++) {
|
|
struct afs_server *s = fc->server_list->servers[i].server;
|
|
int probe_error = READ_ONCE(s->probe.error);
|
|
|
|
switch (probe_error) {
|
|
case 0:
|
|
continue;
|
|
default:
|
|
if (error == -ETIMEDOUT ||
|
|
error == -ETIME)
|
|
continue;
|
|
case -ETIMEDOUT:
|
|
case -ETIME:
|
|
if (error == -ENOMEM ||
|
|
error == -ENONET)
|
|
continue;
|
|
case -ENOMEM:
|
|
case -ENONET:
|
|
if (error == -ENETUNREACH)
|
|
continue;
|
|
case -ENETUNREACH:
|
|
if (error == -EHOSTUNREACH)
|
|
continue;
|
|
case -EHOSTUNREACH:
|
|
if (error == -ECONNREFUSED)
|
|
continue;
|
|
case -ECONNREFUSED:
|
|
if (error == -ECONNRESET)
|
|
continue;
|
|
case -ECONNRESET: /* Responded, but call expired. */
|
|
if (error == -ECONNABORTED)
|
|
continue;
|
|
case -ECONNABORTED:
|
|
abort_code = s->probe.abort_code;
|
|
error = probe_error;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (error == -ECONNABORTED)
|
|
error = afs_abort_to_error(abort_code);
|
|
|
|
failed_set_error:
|
|
fc->error = error;
|
|
failed:
|
|
fc->flags |= AFS_FS_CURSOR_STOP;
|
|
afs_end_cursor(&fc->ac);
|
|
_leave(" = f [failed %d]", fc->error);
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* Select the same fileserver we used for a vnode before and only that
|
|
* fileserver. We use this when we have a lock on that file, which is backed
|
|
* only by the fileserver we obtained it from.
|
|
*/
|
|
bool afs_select_current_fileserver(struct afs_fs_cursor *fc)
|
|
{
|
|
struct afs_vnode *vnode = fc->vnode;
|
|
struct afs_cb_interest *cbi = vnode->cb_interest;
|
|
struct afs_addr_list *alist;
|
|
int error = fc->ac.error;
|
|
|
|
_enter("");
|
|
|
|
switch (error) {
|
|
case SHRT_MAX:
|
|
if (!cbi) {
|
|
fc->error = -ESTALE;
|
|
fc->flags |= AFS_FS_CURSOR_STOP;
|
|
return false;
|
|
}
|
|
|
|
fc->cbi = afs_get_cb_interest(vnode->cb_interest);
|
|
|
|
read_lock(&cbi->server->fs_lock);
|
|
alist = rcu_dereference_protected(cbi->server->addresses,
|
|
lockdep_is_held(&cbi->server->fs_lock));
|
|
afs_get_addrlist(alist);
|
|
read_unlock(&cbi->server->fs_lock);
|
|
if (!alist) {
|
|
fc->error = -ESTALE;
|
|
fc->flags |= AFS_FS_CURSOR_STOP;
|
|
return false;
|
|
}
|
|
|
|
memset(&fc->ac, 0, sizeof(fc->ac));
|
|
fc->ac.alist = alist;
|
|
fc->ac.index = -1;
|
|
goto iterate_address;
|
|
|
|
case 0:
|
|
default:
|
|
/* Success or local failure. Stop. */
|
|
fc->error = error;
|
|
fc->flags |= AFS_FS_CURSOR_STOP;
|
|
_leave(" = f [okay/local %d]", error);
|
|
return false;
|
|
|
|
case -ECONNABORTED:
|
|
fc->error = afs_abort_to_error(fc->ac.abort_code);
|
|
fc->flags |= AFS_FS_CURSOR_STOP;
|
|
_leave(" = f [abort]");
|
|
return false;
|
|
|
|
case -ENETUNREACH:
|
|
case -EHOSTUNREACH:
|
|
case -ECONNREFUSED:
|
|
case -ETIMEDOUT:
|
|
case -ETIME:
|
|
_debug("no conn");
|
|
fc->error = error;
|
|
goto iterate_address;
|
|
}
|
|
|
|
iterate_address:
|
|
/* Iterate over the current server's address list to try and find an
|
|
* address on which it will respond to us.
|
|
*/
|
|
if (afs_iterate_addresses(&fc->ac)) {
|
|
_leave(" = t");
|
|
return true;
|
|
}
|
|
|
|
afs_end_cursor(&fc->ac);
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* Dump cursor state in the case of the error being EDESTADDRREQ.
|
|
*/
|
|
static void afs_dump_edestaddrreq(const struct afs_fs_cursor *fc)
|
|
{
|
|
static int count;
|
|
int i;
|
|
|
|
if (!IS_ENABLED(CONFIG_AFS_DEBUG_CURSOR) || count > 3)
|
|
return;
|
|
count++;
|
|
|
|
rcu_read_lock();
|
|
|
|
pr_notice("EDESTADDR occurred\n");
|
|
pr_notice("FC: cbb=%x cbb2=%x fl=%hx err=%hd\n",
|
|
fc->cb_break, fc->cb_break_2, fc->flags, fc->error);
|
|
pr_notice("FC: ut=%lx ix=%d ni=%u\n",
|
|
fc->untried, fc->index, fc->nr_iterations);
|
|
|
|
if (fc->server_list) {
|
|
const struct afs_server_list *sl = fc->server_list;
|
|
pr_notice("FC: SL nr=%u pr=%u vnov=%hx\n",
|
|
sl->nr_servers, sl->preferred, sl->vnovol_mask);
|
|
for (i = 0; i < sl->nr_servers; i++) {
|
|
const struct afs_server *s = sl->servers[i].server;
|
|
pr_notice("FC: server fl=%lx av=%u %pU\n",
|
|
s->flags, s->addr_version, &s->uuid);
|
|
if (s->addresses) {
|
|
const struct afs_addr_list *a =
|
|
rcu_dereference(s->addresses);
|
|
pr_notice("FC: - av=%u nr=%u/%u/%u pr=%u\n",
|
|
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);
|
|
if (a == fc->ac.alist)
|
|
pr_notice("FC: - current\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
pr_notice("AC: t=%lx ax=%u ac=%d er=%d r=%u ni=%u\n",
|
|
fc->ac.tried, fc->ac.index, fc->ac.abort_code, fc->ac.error,
|
|
fc->ac.responded, fc->ac.nr_iterations);
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
/*
|
|
* Tidy up a filesystem cursor and unlock the vnode.
|
|
*/
|
|
int afs_end_vnode_operation(struct afs_fs_cursor *fc)
|
|
{
|
|
struct afs_net *net = afs_v2net(fc->vnode);
|
|
|
|
if (fc->error == -EDESTADDRREQ ||
|
|
fc->error == -ENETUNREACH ||
|
|
fc->error == -EHOSTUNREACH)
|
|
afs_dump_edestaddrreq(fc);
|
|
|
|
mutex_unlock(&fc->vnode->io_lock);
|
|
|
|
afs_end_cursor(&fc->ac);
|
|
afs_put_cb_interest(net, fc->cbi);
|
|
afs_put_serverlist(net, fc->server_list);
|
|
|
|
if (fc->error == -ECONNABORTED)
|
|
fc->error = afs_abort_to_error(fc->ac.abort_code);
|
|
|
|
return fc->error;
|
|
}
|