Revision 4130a4b206e7c628482aa12ec30949382c8cdc5e authored by David S. Miller on 26 October 2006, 05:31:06 UTC, committed by David S. Miller on 26 October 2006, 05:39:15 UTC
1) probe_other_fhcs() wants to see only non-central FHC busses, so skip FHCs that don't sit off the root 2) Like SBUS, FHC can lack the appropriate address and size cell count properties, so add an of_busses[] entry and handlers for that. 3) Central FHC irq translator probing was buggy. We were trying to use dp->child in irq_trans_init but that linkage is not setup at this point. So instead, pass in the parent of "dp" and look for the child "fhc" with parent "central". Thanks to the tireless assistence of Ben Collins in tracking down these problems and testing out these fixes. Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent 291b58d
vnode.c
/* vnode.c: AFS vnode management
*
* Copyright (C) 2002 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 License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/pagemap.h>
#include "volume.h"
#include "cell.h"
#include "cmservice.h"
#include "fsclient.h"
#include "vlclient.h"
#include "vnode.h"
#include "internal.h"
static void afs_vnode_cb_timed_out(struct afs_timer *timer);
struct afs_timer_ops afs_vnode_cb_timed_out_ops = {
.timed_out = afs_vnode_cb_timed_out,
};
#ifdef AFS_CACHING_SUPPORT
static cachefs_match_val_t afs_vnode_cache_match(void *target,
const void *entry);
static void afs_vnode_cache_update(void *source, void *entry);
struct cachefs_index_def afs_vnode_cache_index_def = {
.name = "vnode",
.data_size = sizeof(struct afs_cache_vnode),
.keys[0] = { CACHEFS_INDEX_KEYS_BIN, 4 },
.match = afs_vnode_cache_match,
.update = afs_vnode_cache_update,
};
#endif
/*****************************************************************************/
/*
* handle a callback timing out
* TODO: retain a ref to vnode struct for an outstanding callback timeout
*/
static void afs_vnode_cb_timed_out(struct afs_timer *timer)
{
struct afs_server *oldserver;
struct afs_vnode *vnode;
vnode = list_entry(timer, struct afs_vnode, cb_timeout);
_enter("%p", vnode);
/* set the changed flag in the vnode and release the server */
spin_lock(&vnode->lock);
oldserver = xchg(&vnode->cb_server, NULL);
if (oldserver) {
vnode->flags |= AFS_VNODE_CHANGED;
spin_lock(&afs_cb_hash_lock);
list_del_init(&vnode->cb_hash_link);
spin_unlock(&afs_cb_hash_lock);
spin_lock(&oldserver->cb_lock);
list_del_init(&vnode->cb_link);
spin_unlock(&oldserver->cb_lock);
}
spin_unlock(&vnode->lock);
afs_put_server(oldserver);
_leave("");
} /* end afs_vnode_cb_timed_out() */
/*****************************************************************************/
/*
* finish off updating the recorded status of a file
* - starts callback expiry timer
* - adds to server's callback list
*/
static void afs_vnode_finalise_status_update(struct afs_vnode *vnode,
struct afs_server *server,
int ret)
{
struct afs_server *oldserver = NULL;
_enter("%p,%p,%d", vnode, server, ret);
spin_lock(&vnode->lock);
vnode->flags &= ~AFS_VNODE_CHANGED;
if (ret == 0) {
/* adjust the callback timeout appropriately */
afs_kafstimod_add_timer(&vnode->cb_timeout,
vnode->cb_expiry * HZ);
spin_lock(&afs_cb_hash_lock);
list_move_tail(&vnode->cb_hash_link,
&afs_cb_hash(server, &vnode->fid));
spin_unlock(&afs_cb_hash_lock);
/* swap ref to old callback server with that for new callback
* server */
oldserver = xchg(&vnode->cb_server, server);
if (oldserver != server) {
if (oldserver) {
spin_lock(&oldserver->cb_lock);
list_del_init(&vnode->cb_link);
spin_unlock(&oldserver->cb_lock);
}
afs_get_server(server);
spin_lock(&server->cb_lock);
list_add_tail(&vnode->cb_link, &server->cb_promises);
spin_unlock(&server->cb_lock);
}
else {
/* same server */
oldserver = NULL;
}
}
else if (ret == -ENOENT) {
/* the file was deleted - clear the callback timeout */
oldserver = xchg(&vnode->cb_server, NULL);
afs_kafstimod_del_timer(&vnode->cb_timeout);
_debug("got NOENT from server - marking file deleted");
vnode->flags |= AFS_VNODE_DELETED;
}
vnode->update_cnt--;
spin_unlock(&vnode->lock);
wake_up_all(&vnode->update_waitq);
afs_put_server(oldserver);
_leave("");
} /* end afs_vnode_finalise_status_update() */
/*****************************************************************************/
/*
* fetch file status from the volume
* - don't issue a fetch if:
* - the changed bit is not set and there's a valid callback
* - there are any outstanding ops that will fetch the status
* - TODO implement local caching
*/
int afs_vnode_fetch_status(struct afs_vnode *vnode)
{
struct afs_server *server;
int ret;
DECLARE_WAITQUEUE(myself, current);
_enter("%s,{%u,%u,%u}",
vnode->volume->vlocation->vldb.name,
vnode->fid.vid, vnode->fid.vnode, vnode->fid.unique);
if (!(vnode->flags & AFS_VNODE_CHANGED) && vnode->cb_server) {
_leave(" [unchanged]");
return 0;
}
if (vnode->flags & AFS_VNODE_DELETED) {
_leave(" [deleted]");
return -ENOENT;
}
spin_lock(&vnode->lock);
if (!(vnode->flags & AFS_VNODE_CHANGED)) {
spin_unlock(&vnode->lock);
_leave(" [unchanged]");
return 0;
}
if (vnode->update_cnt > 0) {
/* someone else started a fetch */
set_current_state(TASK_UNINTERRUPTIBLE);
add_wait_queue(&vnode->update_waitq, &myself);
/* wait for the status to be updated */
for (;;) {
if (!(vnode->flags & AFS_VNODE_CHANGED))
break;
if (vnode->flags & AFS_VNODE_DELETED)
break;
/* it got updated and invalidated all before we saw
* it */
if (vnode->update_cnt == 0) {
remove_wait_queue(&vnode->update_waitq,
&myself);
set_current_state(TASK_RUNNING);
goto get_anyway;
}
spin_unlock(&vnode->lock);
schedule();
set_current_state(TASK_UNINTERRUPTIBLE);
spin_lock(&vnode->lock);
}
remove_wait_queue(&vnode->update_waitq, &myself);
spin_unlock(&vnode->lock);
set_current_state(TASK_RUNNING);
return vnode->flags & AFS_VNODE_DELETED ? -ENOENT : 0;
}
get_anyway:
/* okay... we're going to have to initiate the op */
vnode->update_cnt++;
spin_unlock(&vnode->lock);
/* merge AFS status fetches and clear outstanding callback on this
* vnode */
do {
/* pick a server to query */
ret = afs_volume_pick_fileserver(vnode->volume, &server);
if (ret<0)
return ret;
_debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
ret = afs_rxfs_fetch_file_status(server, vnode, NULL);
} while (!afs_volume_release_fileserver(vnode->volume, server, ret));
/* adjust the flags */
afs_vnode_finalise_status_update(vnode, server, ret);
_leave(" = %d", ret);
return ret;
} /* end afs_vnode_fetch_status() */
/*****************************************************************************/
/*
* fetch file data from the volume
* - TODO implement caching and server failover
*/
int afs_vnode_fetch_data(struct afs_vnode *vnode,
struct afs_rxfs_fetch_descriptor *desc)
{
struct afs_server *server;
int ret;
_enter("%s,{%u,%u,%u}",
vnode->volume->vlocation->vldb.name,
vnode->fid.vid,
vnode->fid.vnode,
vnode->fid.unique);
/* this op will fetch the status */
spin_lock(&vnode->lock);
vnode->update_cnt++;
spin_unlock(&vnode->lock);
/* merge in AFS status fetches and clear outstanding callback on this
* vnode */
do {
/* pick a server to query */
ret = afs_volume_pick_fileserver(vnode->volume, &server);
if (ret < 0)
return ret;
_debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
ret = afs_rxfs_fetch_file_data(server, vnode, desc, NULL);
} while (!afs_volume_release_fileserver(vnode->volume, server, ret));
/* adjust the flags */
afs_vnode_finalise_status_update(vnode, server, ret);
_leave(" = %d", ret);
return ret;
} /* end afs_vnode_fetch_data() */
/*****************************************************************************/
/*
* break any outstanding callback on a vnode
* - only relevent to server that issued it
*/
int afs_vnode_give_up_callback(struct afs_vnode *vnode)
{
struct afs_server *server;
int ret;
_enter("%s,{%u,%u,%u}",
vnode->volume->vlocation->vldb.name,
vnode->fid.vid,
vnode->fid.vnode,
vnode->fid.unique);
spin_lock(&afs_cb_hash_lock);
list_del_init(&vnode->cb_hash_link);
spin_unlock(&afs_cb_hash_lock);
/* set the changed flag in the vnode and release the server */
spin_lock(&vnode->lock);
afs_kafstimod_del_timer(&vnode->cb_timeout);
server = xchg(&vnode->cb_server, NULL);
if (server) {
vnode->flags |= AFS_VNODE_CHANGED;
spin_lock(&server->cb_lock);
list_del_init(&vnode->cb_link);
spin_unlock(&server->cb_lock);
}
spin_unlock(&vnode->lock);
ret = 0;
if (server) {
ret = afs_rxfs_give_up_callback(server, vnode);
afs_put_server(server);
}
_leave(" = %d", ret);
return ret;
} /* end afs_vnode_give_up_callback() */
/*****************************************************************************/
/*
* match a vnode record stored in the cache
*/
#ifdef AFS_CACHING_SUPPORT
static cachefs_match_val_t afs_vnode_cache_match(void *target,
const void *entry)
{
const struct afs_cache_vnode *cvnode = entry;
struct afs_vnode *vnode = target;
_enter("{%x,%x,%Lx},{%x,%x,%Lx}",
vnode->fid.vnode,
vnode->fid.unique,
vnode->status.version,
cvnode->vnode_id,
cvnode->vnode_unique,
cvnode->data_version);
if (vnode->fid.vnode != cvnode->vnode_id) {
_leave(" = FAILED");
return CACHEFS_MATCH_FAILED;
}
if (vnode->fid.unique != cvnode->vnode_unique ||
vnode->status.version != cvnode->data_version) {
_leave(" = DELETE");
return CACHEFS_MATCH_SUCCESS_DELETE;
}
_leave(" = SUCCESS");
return CACHEFS_MATCH_SUCCESS;
} /* end afs_vnode_cache_match() */
#endif
/*****************************************************************************/
/*
* update a vnode record stored in the cache
*/
#ifdef AFS_CACHING_SUPPORT
static void afs_vnode_cache_update(void *source, void *entry)
{
struct afs_cache_vnode *cvnode = entry;
struct afs_vnode *vnode = source;
_enter("");
cvnode->vnode_id = vnode->fid.vnode;
cvnode->vnode_unique = vnode->fid.unique;
cvnode->data_version = vnode->status.version;
} /* end afs_vnode_cache_update() */
#endif
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