1 files changed, 0 insertions, 720 deletions

diff --git a/fs/afs/vlocation.c b/fs/afs/vlocation.c
deleted file mode 100644
index 37b7c3b342a6..000000000000
--- a/fs/afs/vlocation.c
+++ /dev/null
@@ -1,720 +0,0 @@
-/* AFS volume location management
- *
- * Copyright (C) 2002, 2007 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/slab.h>
-#include <linux/init.h>
-#include <linux/sched.h>
-#include "internal.h"
-
-static unsigned afs_vlocation_timeout = 10;	/* volume location timeout in seconds */
-static unsigned afs_vlocation_update_timeout = 10 * 60;
-
-static void afs_vlocation_reaper(struct work_struct *);
-static void afs_vlocation_updater(struct work_struct *);
-
-static LIST_HEAD(afs_vlocation_updates);
-static LIST_HEAD(afs_vlocation_graveyard);
-static DEFINE_SPINLOCK(afs_vlocation_updates_lock);
-static DEFINE_SPINLOCK(afs_vlocation_graveyard_lock);
-static DECLARE_DELAYED_WORK(afs_vlocation_reap, afs_vlocation_reaper);
-static DECLARE_DELAYED_WORK(afs_vlocation_update, afs_vlocation_updater);
-static struct workqueue_struct *afs_vlocation_update_worker;
-
-/*
- * iterate through the VL servers in a cell until one of them admits knowing
- * about the volume in question
- */
-static int afs_vlocation_access_vl_by_name(struct afs_vlocation *vl,
-					   struct key *key,
-					   struct afs_cache_vlocation *vldb)
-{
-	struct afs_cell *cell = vl->cell;
-	struct in_addr addr;
-	int count, ret;
-
-	_enter("%s,%s", cell->name, vl->vldb.name);
-
-	down_write(&vl->cell->vl_sem);
-	ret = -ENOMEDIUM;
-	for (count = cell->vl_naddrs; count > 0; count--) {
-		addr = cell->vl_addrs[cell->vl_curr_svix];
-
-		_debug("CellServ[%hu]: %08x", cell->vl_curr_svix, addr.s_addr);
-
-		/* attempt to access the VL server */
-		ret = afs_vl_get_entry_by_name(&addr, key, vl->vldb.name, vldb,
-					       false);
-		switch (ret) {
-		case 0:
-			goto out;
-		case -ENOMEM:
-		case -ENONET:
-		case -ENETUNREACH:
-		case -EHOSTUNREACH:
-		case -ECONNREFUSED:
-			if (ret == -ENOMEM || ret == -ENONET)
-				goto out;
-			goto rotate;
-		case -ENOMEDIUM:
-		case -EKEYREJECTED:
-		case -EKEYEXPIRED:
-			goto out;
-		default:
-			ret = -EIO;
-			goto rotate;
-		}
-
-		/* rotate the server records upon lookup failure */
-	rotate:
-		cell->vl_curr_svix++;
-		cell->vl_curr_svix %= cell->vl_naddrs;
-	}
-
-out:
-	up_write(&vl->cell->vl_sem);
-	_leave(" = %d", ret);
-	return ret;
-}
-
-/*
- * iterate through the VL servers in a cell until one of them admits knowing
- * about the volume in question
- */
-static int afs_vlocation_access_vl_by_id(struct afs_vlocation *vl,
-					 struct key *key,
-					 afs_volid_t volid,
-					 afs_voltype_t voltype,
-					 struct afs_cache_vlocation *vldb)
-{
-	struct afs_cell *cell = vl->cell;
-	struct in_addr addr;
-	int count, ret;
-
-	_enter("%s,%x,%d,", cell->name, volid, voltype);
-
-	down_write(&vl->cell->vl_sem);
-	ret = -ENOMEDIUM;
-	for (count = cell->vl_naddrs; count > 0; count--) {
-		addr = cell->vl_addrs[cell->vl_curr_svix];
-
-		_debug("CellServ[%hu]: %08x", cell->vl_curr_svix, addr.s_addr);
-
-		/* attempt to access the VL server */
-		ret = afs_vl_get_entry_by_id(&addr, key, volid, voltype, vldb,
-					     false);
-		switch (ret) {
-		case 0:
-			goto out;
-		case -ENOMEM:
-		case -ENONET:
-		case -ENETUNREACH:
-		case -EHOSTUNREACH:
-		case -ECONNREFUSED:
-			if (ret == -ENOMEM || ret == -ENONET)
-				goto out;
-			goto rotate;
-		case -EBUSY:
-			vl->upd_busy_cnt++;
-			if (vl->upd_busy_cnt <= 3) {
-				if (vl->upd_busy_cnt > 1) {
-					/* second+ BUSY - sleep a little bit */
-					set_current_state(TASK_UNINTERRUPTIBLE);
-					schedule_timeout(1);
-				}
-				continue;
-			}
-			break;
-		case -ENOMEDIUM:
-			vl->upd_rej_cnt++;
-			goto rotate;
-		default:
-			ret = -EIO;
-			goto rotate;
-		}
-
-		/* rotate the server records upon lookup failure */
-	rotate:
-		cell->vl_curr_svix++;
-		cell->vl_curr_svix %= cell->vl_naddrs;
-		vl->upd_busy_cnt = 0;
-	}
-
-out:
-	if (ret < 0 && vl->upd_rej_cnt > 0) {
-		printk(KERN_NOTICE "kAFS:"
-		       " Active volume no longer valid '%s'\n",
-		       vl->vldb.name);
-		vl->valid = 0;
-		ret = -ENOMEDIUM;
-	}
-
-	up_write(&vl->cell->vl_sem);
-	_leave(" = %d", ret);
-	return ret;
-}
-
-/*
- * allocate a volume location record
- */
-static struct afs_vlocation *afs_vlocation_alloc(struct afs_cell *cell,
-						 const char *name,
-						 size_t namesz)
-{
-	struct afs_vlocation *vl;
-
-	vl = kzalloc(sizeof(struct afs_vlocation), GFP_KERNEL);
-	if (vl) {
-		vl->cell = cell;
-		vl->state = AFS_VL_NEW;
-		atomic_set(&vl->usage, 1);
-		INIT_LIST_HEAD(&vl->link);
-		INIT_LIST_HEAD(&vl->grave);
-		INIT_LIST_HEAD(&vl->update);
-		init_waitqueue_head(&vl->waitq);
-		spin_lock_init(&vl->lock);
-		memcpy(vl->vldb.name, name, namesz);
-	}
-
-	_leave(" = %p", vl);
-	return vl;
-}
-
-/*
- * update record if we found it in the cache
- */
-static int afs_vlocation_update_record(struct afs_vlocation *vl,
-				       struct key *key,
-				       struct afs_cache_vlocation *vldb)
-{
-	afs_voltype_t voltype;
-	afs_volid_t vid;
-	int ret;
-
-	/* try to look up a cached volume in the cell VL databases by ID */
-	_debug("Locally Cached: %s %02x { %08x(%x) %08x(%x) %08x(%x) }",
-	       vl->vldb.name,
-	       vl->vldb.vidmask,
-	       ntohl(vl->vldb.servers[0].s_addr),
-	       vl->vldb.srvtmask[0],
-	       ntohl(vl->vldb.servers[1].s_addr),
-	       vl->vldb.srvtmask[1],
-	       ntohl(vl->vldb.servers[2].s_addr),
-	       vl->vldb.srvtmask[2]);
-
-	_debug("Vids: %08x %08x %08x",
-	       vl->vldb.vid[0],
-	       vl->vldb.vid[1],
-	       vl->vldb.vid[2]);
-
-	if (vl->vldb.vidmask & AFS_VOL_VTM_RW) {
-		vid = vl->vldb.vid[0];
-		voltype = AFSVL_RWVOL;
-	} else if (vl->vldb.vidmask & AFS_VOL_VTM_RO) {
-		vid = vl->vldb.vid[1];
-		voltype = AFSVL_ROVOL;
-	} else if (vl->vldb.vidmask & AFS_VOL_VTM_BAK) {
-		vid = vl->vldb.vid[2];
-		voltype = AFSVL_BACKVOL;
-	} else {
-		BUG();
-		vid = 0;
-		voltype = 0;
-	}
-
-	/* contact the server to make sure the volume is still available
-	 * - TODO: need to handle disconnected operation here
-	 */
-	ret = afs_vlocation_access_vl_by_id(vl, key, vid, voltype, vldb);
-	switch (ret) {
-		/* net error */
-	default:
-		printk(KERN_WARNING "kAFS:"
-		       " failed to update volume '%s' (%x) up in '%s': %d\n",
-		       vl->vldb.name, vid, vl->cell->name, ret);
-		_leave(" = %d", ret);
-		return ret;
-
-		/* pulled from local cache into memory */
-	case 0:
-		_leave(" = 0");
-		return 0;
-
-		/* uh oh... looks like the volume got deleted */
-	case -ENOMEDIUM:
-		printk(KERN_ERR "kAFS:"
-		       " volume '%s' (%x) does not exist '%s'\n",
-		       vl->vldb.name, vid, vl->cell->name);
-
-		/* TODO: make existing record unavailable */
-		_leave(" = %d", ret);
-		return ret;
-	}
-}
-
-/*
- * apply the update to a VL record
- */
-static void afs_vlocation_apply_update(struct afs_vlocation *vl,
-				       struct afs_cache_vlocation *vldb)
-{
-	_debug("Done VL Lookup: %s %02x { %08x(%x) %08x(%x) %08x(%x) }",
-	       vldb->name, vldb->vidmask,
-	       ntohl(vldb->servers[0].s_addr), vldb->srvtmask[0],
-	       ntohl(vldb->servers[1].s_addr), vldb->srvtmask[1],
-	       ntohl(vldb->servers[2].s_addr), vldb->srvtmask[2]);
-
-	_debug("Vids: %08x %08x %08x",
-	       vldb->vid[0], vldb->vid[1], vldb->vid[2]);
-
-	if (strcmp(vldb->name, vl->vldb.name) != 0)
-		printk(KERN_NOTICE "kAFS:"
-		       " name of volume '%s' changed to '%s' on server\n",
-		       vl->vldb.name, vldb->name);
-
-	vl->vldb = *vldb;
-
-#ifdef CONFIG_AFS_FSCACHE
-	fscache_update_cookie(vl->cache);
-#endif
-}
-
-/*
- * fill in a volume location record, consulting the cache and the VL server
- * both
- */
-static int afs_vlocation_fill_in_record(struct afs_vlocation *vl,
-					struct key *key)
-{
-	struct afs_cache_vlocation vldb;
-	int ret;
-
-	_enter("");
-
-	ASSERTCMP(vl->valid, ==, 0);
-
-	memset(&vldb, 0, sizeof(vldb));
-
-	/* see if we have an in-cache copy (will set vl->valid if there is) */
-#ifdef CONFIG_AFS_FSCACHE
-	vl->cache = fscache_acquire_cookie(vl->cell->cache,
-					   &afs_vlocation_cache_index_def, vl,
-					   true);
-#endif
-
-	if (vl->valid) {
-		/* try to update a known volume in the cell VL databases by
-		 * ID as the name may have changed */
-		_debug("found in cache");
-		ret = afs_vlocation_update_record(vl, key, &vldb);
-	} else {
-		/* try to look up an unknown volume in the cell VL databases by
-		 * name */
-		ret = afs_vlocation_access_vl_by_name(vl, key, &vldb);
-		if (ret < 0) {
-			printk("kAFS: failed to locate '%s' in cell '%s'\n",
-			       vl->vldb.name, vl->cell->name);
-			return ret;
-		}
-	}
-
-	afs_vlocation_apply_update(vl, &vldb);
-	_leave(" = 0");
-	return 0;
-}
-
-/*
- * queue a vlocation record for updates
- */
-static void afs_vlocation_queue_for_updates(struct afs_vlocation *vl)
-{
-	struct afs_vlocation *xvl;
-
-	/* wait at least 10 minutes before updating... */
-	vl->update_at = ktime_get_real_seconds() +
-			afs_vlocation_update_timeout;
-
-	spin_lock(&afs_vlocation_updates_lock);
-
-	if (!list_empty(&afs_vlocation_updates)) {
-		/* ... but wait at least 1 second more than the newest record
-		 * already queued so that we don't spam the VL server suddenly
-		 * with lots of requests
-		 */
-		xvl = list_entry(afs_vlocation_updates.prev,
-				 struct afs_vlocation, update);
-		if (vl->update_at <= xvl->update_at)
-			vl->update_at = xvl->update_at + 1;
-	} else {
-		queue_delayed_work(afs_vlocation_update_worker,
-				   &afs_vlocation_update,
-				   afs_vlocation_update_timeout * HZ);
-	}
-
-	list_add_tail(&vl->update, &afs_vlocation_updates);
-	spin_unlock(&afs_vlocation_updates_lock);
-}
-
-/*
- * lookup volume location
- * - iterate through the VL servers in a cell until one of them admits knowing
- *   about the volume in question
- * - lookup in the local cache if not able to find on the VL server
- * - insert/update in the local cache if did get a VL response
- */
-struct afs_vlocation *afs_vlocation_lookup(struct afs_cell *cell,
-					   struct key *key,
-					   const char *name,
-					   size_t namesz)
-{
-	struct afs_vlocation *vl;
-	int ret;
-
-	_enter("{%s},{%x},%*.*s,%zu",
-	       cell->name, key_serial(key),
-	       (int) namesz, (int) namesz, name, namesz);
-
-	if (namesz >= sizeof(vl->vldb.name)) {
-		_leave(" = -ENAMETOOLONG");
-		return ERR_PTR(-ENAMETOOLONG);
-	}
-
-	/* see if we have an in-memory copy first */
-	down_write(&cell->vl_sem);
-	spin_lock(&cell->vl_lock);
-	list_for_each_entry(vl, &cell->vl_list, link) {
-		if (vl->vldb.name[namesz] != '\0')
-			continue;
-		if (memcmp(vl->vldb.name, name, namesz) == 0)
-			goto found_in_memory;
-	}
-	spin_unlock(&cell->vl_lock);
-
-	/* not in the cell's in-memory lists - create a new record */
-	vl = afs_vlocation_alloc(cell, name, namesz);
-	if (!vl) {
-		up_write(&cell->vl_sem);
-		return ERR_PTR(-ENOMEM);
-	}
-
-	afs_get_cell(cell);
-
-	list_add_tail(&vl->link, &cell->vl_list);
-	vl->state = AFS_VL_CREATING;
-	up_write(&cell->vl_sem);
-
-fill_in_record:
-	ret = afs_vlocation_fill_in_record(vl, key);
-	if (ret < 0)
-		goto error_abandon;
-	spin_lock(&vl->lock);
-	vl->state = AFS_VL_VALID;
-	spin_unlock(&vl->lock);
-	wake_up(&vl->waitq);
-
-	/* update volume entry in local cache */
-#ifdef CONFIG_AFS_FSCACHE
-	fscache_update_cookie(vl->cache);
-#endif
-
-	/* schedule for regular updates */
-	afs_vlocation_queue_for_updates(vl);
-	goto success;
-
-found_in_memory:
-	/* found in memory */
-	_debug("found in memory");
-	atomic_inc(&vl->usage);
-	spin_unlock(&cell->vl_lock);
-	if (!list_empty(&vl->grave)) {
-		spin_lock(&afs_vlocation_graveyard_lock);
-		list_del_init(&vl->grave);
-		spin_unlock(&afs_vlocation_graveyard_lock);
-	}
-	up_write(&cell->vl_sem);
-
-	/* see if it was an abandoned record that we might try filling in */
-	spin_lock(&vl->lock);
-	while (vl->state != AFS_VL_VALID) {
-		afs_vlocation_state_t state = vl->state;
-
-		_debug("invalid [state %d]", state);
-
-		if (state == AFS_VL_NEW || state == AFS_VL_NO_VOLUME) {
-			vl->state = AFS_VL_CREATING;
-			spin_unlock(&vl->lock);
-			goto fill_in_record;
-		}
-
-		/* must now wait for creation or update by someone else to
-		 * complete */
-		_debug("wait");
-
-		spin_unlock(&vl->lock);
-		ret = wait_event_interruptible(vl->waitq,
-					       vl->state == AFS_VL_NEW ||
-					       vl->state == AFS_VL_VALID ||
-					       vl->state == AFS_VL_NO_VOLUME);
-		if (ret < 0)
-			goto error;
-		spin_lock(&vl->lock);
-	}
-	spin_unlock(&vl->lock);
-
-success:
-	_leave(" = %p", vl);
-	return vl;
-
-error_abandon:
-	spin_lock(&vl->lock);
-	vl->state = AFS_VL_NEW;
-	spin_unlock(&vl->lock);
-	wake_up(&vl->waitq);
-error:
-	ASSERT(vl != NULL);
-	afs_put_vlocation(vl);
-	_leave(" = %d", ret);
-	return ERR_PTR(ret);
-}
-
-/*
- * finish using a volume location record
- */
-void afs_put_vlocation(struct afs_vlocation *vl)
-{
-	if (!vl)
-		return;
-
-	_enter("%s", vl->vldb.name);
-
-	ASSERTCMP(atomic_read(&vl->usage), >, 0);
-
-	if (likely(!atomic_dec_and_test(&vl->usage))) {
-		_leave("");
-		return;
-	}
-
-	spin_lock(&afs_vlocation_graveyard_lock);
-	if (atomic_read(&vl->usage) == 0) {
-		_debug("buried");
-		list_move_tail(&vl->grave, &afs_vlocation_graveyard);
-		vl->time_of_death = ktime_get_real_seconds();
-		queue_delayed_work(afs_wq, &afs_vlocation_reap,
-				   afs_vlocation_timeout * HZ);
-
-		/* suspend updates on this record */
-		if (!list_empty(&vl->update)) {
-			spin_lock(&afs_vlocation_updates_lock);
-			list_del_init(&vl->update);
-			spin_unlock(&afs_vlocation_updates_lock);
-		}
-	}
-	spin_unlock(&afs_vlocation_graveyard_lock);
-	_leave(" [killed?]");
-}
-
-/*
- * destroy a dead volume location record
- */
-static void afs_vlocation_destroy(struct afs_vlocation *vl)
-{
-	_enter("%p", vl);
-
-#ifdef CONFIG_AFS_FSCACHE
-	fscache_relinquish_cookie(vl->cache, 0);
-#endif
-	afs_put_cell(vl->cell);
-	kfree(vl);
-}
-
-/*
- * reap dead volume location records
- */
-static void afs_vlocation_reaper(struct work_struct *work)
-{
-	LIST_HEAD(corpses);
-	struct afs_vlocation *vl;
-	unsigned long delay, expiry;
-	time64_t now;
-
-	_enter("");
-
-	now = ktime_get_real_seconds();
-	spin_lock(&afs_vlocation_graveyard_lock);
-
-	while (!list_empty(&afs_vlocation_graveyard)) {
-		vl = list_entry(afs_vlocation_graveyard.next,
-				struct afs_vlocation, grave);
-
-		_debug("check %p", vl);
-
-		/* the queue is ordered most dead first */
-		expiry = vl->time_of_death + afs_vlocation_timeout;
-		if (expiry > now) {
-			delay = (expiry - now) * HZ;
-			_debug("delay %lu", delay);
-			mod_delayed_work(afs_wq, &afs_vlocation_reap, delay);
-			break;
-		}
-
-		spin_lock(&vl->cell->vl_lock);
-		if (atomic_read(&vl->usage) > 0) {
-			_debug("no reap");
-			list_del_init(&vl->grave);
-		} else {
-			_debug("reap");
-			list_move_tail(&vl->grave, &corpses);
-			list_del_init(&vl->link);
-		}
-		spin_unlock(&vl->cell->vl_lock);
-	}
-
-	spin_unlock(&afs_vlocation_graveyard_lock);
-
-	/* now reap the corpses we've extracted */
-	while (!list_empty(&corpses)) {
-		vl = list_entry(corpses.next, struct afs_vlocation, grave);
-		list_del(&vl->grave);
-		afs_vlocation_destroy(vl);
-	}
-
-	_leave("");
-}
-
-/*
- * initialise the VL update process
- */
-int __init afs_vlocation_update_init(void)
-{
-	afs_vlocation_update_worker = alloc_workqueue("kafs_vlupdated",
-						      WQ_MEM_RECLAIM, 0);
-	return afs_vlocation_update_worker ? 0 : -ENOMEM;
-}
-
-/*
- * discard all the volume location records for rmmod
- */
-void afs_vlocation_purge(void)
-{
-	afs_vlocation_timeout = 0;
-
-	spin_lock(&afs_vlocation_updates_lock);
-	list_del_init(&afs_vlocation_updates);
-	spin_unlock(&afs_vlocation_updates_lock);
-	mod_delayed_work(afs_vlocation_update_worker, &afs_vlocation_update, 0);
-	destroy_workqueue(afs_vlocation_update_worker);
-
-	mod_delayed_work(afs_wq, &afs_vlocation_reap, 0);
-}
-
-/*
- * update a volume location
- */
-static void afs_vlocation_updater(struct work_struct *work)
-{
-	struct afs_cache_vlocation vldb;
-	struct afs_vlocation *vl, *xvl;
-	time64_t now;
-	long timeout;
-	int ret;
-
-	_enter("");
-
-	now = ktime_get_real_seconds();
-
-	/* find a record to update */
-	spin_lock(&afs_vlocation_updates_lock);
-	for (;;) {
-		if (list_empty(&afs_vlocation_updates)) {
-			spin_unlock(&afs_vlocation_updates_lock);
-			_leave(" [nothing]");
-			return;
-		}
-
-		vl = list_entry(afs_vlocation_updates.next,
-				struct afs_vlocation, update);
-		if (atomic_read(&vl->usage) > 0)
-			break;
-		list_del_init(&vl->update);
-	}
-
-	timeout = vl->update_at - now;
-	if (timeout > 0) {
-		queue_delayed_work(afs_vlocation_update_worker,
-				   &afs_vlocation_update, timeout * HZ);
-		spin_unlock(&afs_vlocation_updates_lock);
-		_leave(" [nothing]");
-		return;
-	}
-
-	list_del_init(&vl->update);
-	atomic_inc(&vl->usage);
-	spin_unlock(&afs_vlocation_updates_lock);
-
-	/* we can now perform the update */
-	_debug("update %s", vl->vldb.name);
-	vl->state = AFS_VL_UPDATING;
-	vl->upd_rej_cnt = 0;
-	vl->upd_busy_cnt = 0;
-
-	ret = afs_vlocation_update_record(vl, NULL, &vldb);
-	spin_lock(&vl->lock);
-	switch (ret) {
-	case 0:
-		afs_vlocation_apply_update(vl, &vldb);
-		vl->state = AFS_VL_VALID;
-		break;
-	case -ENOMEDIUM:
-		vl->state = AFS_VL_VOLUME_DELETED;
-		break;
-	default:
-		vl->state = AFS_VL_UNCERTAIN;
-		break;
-	}
-	spin_unlock(&vl->lock);
-	wake_up(&vl->waitq);
-
-	/* and then reschedule */
-	_debug("reschedule");
-	vl->update_at = ktime_get_real_seconds() +
-			afs_vlocation_update_timeout;
-
-	spin_lock(&afs_vlocation_updates_lock);
-
-	if (!list_empty(&afs_vlocation_updates)) {
-		/* next update in 10 minutes, but wait at least 1 second more
-		 * than the newest record already queued so that we don't spam
-		 * the VL server suddenly with lots of requests
-		 */
-		xvl = list_entry(afs_vlocation_updates.prev,
-				 struct afs_vlocation, update);
-		if (vl->update_at <= xvl->update_at)
-			vl->update_at = xvl->update_at + 1;
-		xvl = list_entry(afs_vlocation_updates.next,
-				 struct afs_vlocation, update);
-		timeout = xvl->update_at - now;
-		if (timeout < 0)
-			timeout = 0;
-	} else {
-		timeout = afs_vlocation_update_timeout;
-	}
-
-	ASSERT(list_empty(&vl->update));
-
-	list_add_tail(&vl->update, &afs_vlocation_updates);
-
-	_debug("timeout %ld", timeout);
-	queue_delayed_work(afs_vlocation_update_worker,
-			   &afs_vlocation_update, timeout * HZ);
-	spin_unlock(&afs_vlocation_updates_lock);
-	afs_put_vlocation(vl);
-}