[linux-2.6-block.git] / fs / afs / proc.c

/* /proc interface for AFS
 *
 * 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/slab.h>
#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/sched.h>
#include <linux/uaccess.h>
#include "internal.h"

struct afs_vl_seq_net_private {
	struct seq_net_private		seq;	/* Must be first */
	struct afs_vlserver_list	*vllist;
};

static inline struct afs_net *afs_seq2net(struct seq_file *m)
{
	return afs_net(seq_file_net(m));
}

static inline struct afs_net *afs_seq2net_single(struct seq_file *m)
{
	return afs_net(seq_file_single_net(m));
}

/*
 * Display the list of cells known to the namespace.
 */
static int afs_proc_cells_show(struct seq_file *m, void *v)
{
	struct afs_vlserver_list *vllist;
	struct afs_cell *cell;

	if (v == SEQ_START_TOKEN) {
		/* display header on line 1 */
		seq_puts(m, "USE    TTL SV NAME\n");
		return 0;
	}

	cell = list_entry(v, struct afs_cell, proc_link);
	vllist = rcu_dereference(cell->vl_servers);

	/* display one cell per line on subsequent lines */
	seq_printf(m, "%3u %6lld %2u %s\n",
		   atomic_read(&cell->usage),
		   cell->dns_expiry - ktime_get_real_seconds(),
		   vllist ? vllist->nr_servers : 0,
		   cell->name);
	return 0;
}

static void *afs_proc_cells_start(struct seq_file *m, loff_t *_pos)
	__acquires(rcu)
{
	rcu_read_lock();
	return seq_hlist_start_head_rcu(&afs_seq2net(m)->proc_cells, *_pos);
}

static void *afs_proc_cells_next(struct seq_file *m, void *v, loff_t *pos)
{
	return seq_hlist_next_rcu(v, &afs_seq2net(m)->proc_cells, pos);
}

static void afs_proc_cells_stop(struct seq_file *m, void *v)
	__releases(rcu)
{
	rcu_read_unlock();
}

static const struct seq_operations afs_proc_cells_ops = {
	.start	= afs_proc_cells_start,
	.next	= afs_proc_cells_next,
	.stop	= afs_proc_cells_stop,
	.show	= afs_proc_cells_show,
};

/*
 * handle writes to /proc/fs/afs/cells
 * - to add cells: echo "add <cellname> <IP>[:<IP>][:<IP>]"
 */
static int afs_proc_cells_write(struct file *file, char *buf, size_t size)
{
	struct seq_file *m = file->private_data;
	struct afs_net *net = afs_seq2net(m);
	char *name, *args;
	int ret;

	/* trim to first NL */
	name = memchr(buf, '\n', size);
	if (name)
		*name = 0;

	/* split into command, name and argslist */
	name = strchr(buf, ' ');
	if (!name)
		goto inval;
	do {
		*name++ = 0;
	} while(*name == ' ');
	if (!*name)
		goto inval;

	args = strchr(name, ' ');
	if (args) {
		do {
			*args++ = 0;
		} while(*args == ' ');
		if (!*args)
			goto inval;
	}

	/* determine command to perform */
	_debug("cmd=%s name=%s args=%s", buf, name, args);

	if (strcmp(buf, "add") == 0) {
		struct afs_cell *cell;

		cell = afs_lookup_cell(net, name, strlen(name), args, true);
		if (IS_ERR(cell)) {
			ret = PTR_ERR(cell);
			goto done;
		}

		if (test_and_set_bit(AFS_CELL_FL_NO_GC, &cell->flags))
			afs_put_cell(net, cell);
	} else {
		goto inval;
	}

	ret = 0;

done:
	_leave(" = %d", ret);
	return ret;

inval:
	ret = -EINVAL;
	printk("kAFS: Invalid Command on /proc/fs/afs/cells file\n");
	goto done;
}

/*
 * Display the name of the current workstation cell.
 */
static int afs_proc_rootcell_show(struct seq_file *m, void *v)
{
	struct afs_cell *cell;
	struct afs_net *net;

	net = afs_seq2net_single(m);
	if (rcu_access_pointer(net->ws_cell)) {
		rcu_read_lock();
		cell = rcu_dereference(net->ws_cell);
		if (cell)
			seq_printf(m, "%s\n", cell->name);
		rcu_read_unlock();
	}
	return 0;
}

/*
 * Set the current workstation cell and optionally supply its list of volume
 * location servers.
 *
 *	echo "cell.name:192.168.231.14" >/proc/fs/afs/rootcell
 */
static int afs_proc_rootcell_write(struct file *file, char *buf, size_t size)
{
	struct seq_file *m = file->private_data;
	struct afs_net *net = afs_seq2net_single(m);
	char *s;
	int ret;

	ret = -EINVAL;
	if (buf[0] == '.')
		goto out;
	if (memchr(buf, '/', size))
		goto out;

	/* trim to first NL */
	s = memchr(buf, '\n', size);
	if (s)
		*s = 0;

	/* determine command to perform */
	_debug("rootcell=%s", buf);

	ret = afs_cell_init(net, buf);

out:
	_leave(" = %d", ret);
	return ret;
}

static const char afs_vol_types[3][3] = {
	[AFSVL_RWVOL]	= "RW",
	[AFSVL_ROVOL]	= "RO",
	[AFSVL_BACKVOL]	= "BK",
};

/*
 * Display the list of volumes known to a cell.
 */
static int afs_proc_cell_volumes_show(struct seq_file *m, void *v)
{
	struct afs_cell *cell = PDE_DATA(file_inode(m->file));
	struct afs_volume *vol = list_entry(v, struct afs_volume, proc_link);

	/* Display header on line 1 */
	if (v == &cell->proc_volumes) {
		seq_puts(m, "USE VID      TY\n");
		return 0;
	}

	seq_printf(m, "%3d %08llx %s\n",
		   atomic_read(&vol->usage), vol->vid,
		   afs_vol_types[vol->type]);

	return 0;
}

static void *afs_proc_cell_volumes_start(struct seq_file *m, loff_t *_pos)
	__acquires(cell->proc_lock)
{
	struct afs_cell *cell = PDE_DATA(file_inode(m->file));

	read_lock(&cell->proc_lock);
	return seq_list_start_head(&cell->proc_volumes, *_pos);
}

static void *afs_proc_cell_volumes_next(struct seq_file *m, void *v,
					loff_t *_pos)
{
	struct afs_cell *cell = PDE_DATA(file_inode(m->file));

	return seq_list_next(v, &cell->proc_volumes, _pos);
}

static void afs_proc_cell_volumes_stop(struct seq_file *m, void *v)
	__releases(cell->proc_lock)
{
	struct afs_cell *cell = PDE_DATA(file_inode(m->file));

	read_unlock(&cell->proc_lock);
}

static const struct seq_operations afs_proc_cell_volumes_ops = {
	.start	= afs_proc_cell_volumes_start,
	.next	= afs_proc_cell_volumes_next,
	.stop	= afs_proc_cell_volumes_stop,
	.show	= afs_proc_cell_volumes_show,
};

static const char *const dns_record_sources[NR__dns_record_source + 1] = {
	[DNS_RECORD_UNAVAILABLE]	= "unav",
	[DNS_RECORD_FROM_CONFIG]	= "cfg",
	[DNS_RECORD_FROM_DNS_A]		= "A",
	[DNS_RECORD_FROM_DNS_AFSDB]	= "AFSDB",
	[DNS_RECORD_FROM_DNS_SRV]	= "SRV",
	[DNS_RECORD_FROM_NSS]		= "nss",
	[NR__dns_record_source]		= "[weird]"
};

static const char *const dns_lookup_statuses[NR__dns_lookup_status + 1] = {
	[DNS_LOOKUP_NOT_DONE]		= "no-lookup",
	[DNS_LOOKUP_GOOD]		= "good",
	[DNS_LOOKUP_GOOD_WITH_BAD]	= "good/bad",
	[DNS_LOOKUP_BAD]		= "bad",
	[DNS_LOOKUP_GOT_NOT_FOUND]	= "not-found",
	[DNS_LOOKUP_GOT_LOCAL_FAILURE]	= "local-failure",
	[DNS_LOOKUP_GOT_TEMP_FAILURE]	= "temp-failure",
	[DNS_LOOKUP_GOT_NS_FAILURE]	= "ns-failure",
	[NR__dns_lookup_status]		= "[weird]"
};

/*
 * Display the list of Volume Location servers we're using for a cell.
 */
static int afs_proc_cell_vlservers_show(struct seq_file *m, void *v)
{
	const struct afs_vl_seq_net_private *priv = m->private;
	const struct afs_vlserver_list *vllist = priv->vllist;
	const struct afs_vlserver_entry *entry;
	const struct afs_vlserver *vlserver;
	const struct afs_addr_list *alist;
	int i;

	if (v == SEQ_START_TOKEN) {
		seq_printf(m, "# source %s, status %s\n",
			   dns_record_sources[vllist->source],
			   dns_lookup_statuses[vllist->status]);
		return 0;
	}

	entry = v;
	vlserver = entry->server;
	alist = rcu_dereference(vlserver->addresses);

	seq_printf(m, "%s [p=%hu w=%hu s=%s,%s]:\n",
		   vlserver->name, entry->priority, entry->weight,
		   dns_record_sources[alist ? alist->source : entry->source],
		   dns_lookup_statuses[alist ? alist->status : entry->status]);
	if (alist) {
		for (i = 0; i < alist->nr_addrs; i++)
			seq_printf(m, " %c %pISpc\n",
				   alist->preferred == i ? '>' : '-',
				   &alist->addrs[i].transport);
	}
	return 0;
}

static void *afs_proc_cell_vlservers_start(struct seq_file *m, loff_t *_pos)
	__acquires(rcu)
{
	struct afs_vl_seq_net_private *priv = m->private;
	struct afs_vlserver_list *vllist;
	struct afs_cell *cell = PDE_DATA(file_inode(m->file));
	loff_t pos = *_pos;

	rcu_read_lock();

	vllist = rcu_dereference(cell->vl_servers);
	priv->vllist = vllist;

	if (pos < 0)
		*_pos = pos = 0;
	if (pos == 0)
		return SEQ_START_TOKEN;

	if (!vllist || pos - 1 >= vllist->nr_servers)
		return NULL;

	return &vllist->servers[pos - 1];
}

static void *afs_proc_cell_vlservers_next(struct seq_file *m, void *v,
					  loff_t *_pos)
{
	struct afs_vl_seq_net_private *priv = m->private;
	struct afs_vlserver_list *vllist = priv->vllist;
	loff_t pos;

	pos = *_pos;
	pos++;
	*_pos = pos;
	if (!vllist || pos - 1 >= vllist->nr_servers)
		return NULL;

	return &vllist->servers[pos - 1];
}

static void afs_proc_cell_vlservers_stop(struct seq_file *m, void *v)
	__releases(rcu)
{
	rcu_read_unlock();
}

static const struct seq_operations afs_proc_cell_vlservers_ops = {
	.start	= afs_proc_cell_vlservers_start,
	.next	= afs_proc_cell_vlservers_next,
	.stop	= afs_proc_cell_vlservers_stop,
	.show	= afs_proc_cell_vlservers_show,
};

/*
 * Display the list of fileservers we're using within a namespace.
 */
static int afs_proc_servers_show(struct seq_file *m, void *v)
{
	struct afs_server *server;
	struct afs_addr_list *alist;
	int i;

	if (v == SEQ_START_TOKEN) {
		seq_puts(m, "UUID                                 USE ADDR\n");
		return 0;
	}

	server = list_entry(v, struct afs_server, proc_link);
	alist = rcu_dereference(server->addresses);
	seq_printf(m, "%pU %3d %pISpc%s\n",
		   &server->uuid,
		   atomic_read(&server->usage),
		   &alist->addrs[0].transport,
		   alist->preferred == 0 ? "*" : "");
	for (i = 1; i < alist->nr_addrs; i++)
		seq_printf(m, "                                         %pISpc%s\n",
			   &alist->addrs[i].transport,
			   alist->preferred == i ? "*" : "");
	return 0;
}

static void *afs_proc_servers_start(struct seq_file *m, loff_t *_pos)
	__acquires(rcu)
{
	rcu_read_lock();
	return seq_hlist_start_head_rcu(&afs_seq2net(m)->fs_proc, *_pos);
}

static void *afs_proc_servers_next(struct seq_file *m, void *v, loff_t *_pos)
{
	return seq_hlist_next_rcu(v, &afs_seq2net(m)->fs_proc, _pos);
}

static void afs_proc_servers_stop(struct seq_file *m, void *v)
	__releases(rcu)
{
	rcu_read_unlock();
}

static const struct seq_operations afs_proc_servers_ops = {
	.start	= afs_proc_servers_start,
	.next	= afs_proc_servers_next,
	.stop	= afs_proc_servers_stop,
	.show	= afs_proc_servers_show,
};

/*
 * Display the list of strings that may be substituted for the @sys pathname
 * macro.
 */
static int afs_proc_sysname_show(struct seq_file *m, void *v)
{
	struct afs_net *net = afs_seq2net(m);
	struct afs_sysnames *sysnames = net->sysnames;
	unsigned int i = (unsigned long)v - 1;

	if (i < sysnames->nr)
		seq_printf(m, "%s\n", sysnames->subs[i]);
	return 0;
}

static void *afs_proc_sysname_start(struct seq_file *m, loff_t *pos)
	__acquires(&net->sysnames_lock)
{
	struct afs_net *net = afs_seq2net(m);
	struct afs_sysnames *names;

	read_lock(&net->sysnames_lock);

	names = net->sysnames;
	if (*pos >= names->nr)
		return NULL;
	return (void *)(unsigned long)(*pos + 1);
}

static void *afs_proc_sysname_next(struct seq_file *m, void *v, loff_t *pos)
{
	struct afs_net *net = afs_seq2net(m);
	struct afs_sysnames *names = net->sysnames;

	*pos += 1;
	if (*pos >= names->nr)
		return NULL;
	return (void *)(unsigned long)(*pos + 1);
}

static void afs_proc_sysname_stop(struct seq_file *m, void *v)
	__releases(&net->sysnames_lock)
{
	struct afs_net *net = afs_seq2net(m);

	read_unlock(&net->sysnames_lock);
}

static const struct seq_operations afs_proc_sysname_ops = {
	.start	= afs_proc_sysname_start,
	.next	= afs_proc_sysname_next,
	.stop	= afs_proc_sysname_stop,
	.show	= afs_proc_sysname_show,
};

/*
 * Allow the @sys substitution to be configured.
 */
static int afs_proc_sysname_write(struct file *file, char *buf, size_t size)
{
	struct afs_sysnames *sysnames, *kill;
	struct seq_file *m = file->private_data;
	struct afs_net *net = afs_seq2net(m);
	char *s, *p, *sub;
	int ret, len;

	sysnames = kzalloc(sizeof(*sysnames), GFP_KERNEL);
	if (!sysnames)
		return -ENOMEM;
	refcount_set(&sysnames->usage, 1);
	kill = sysnames;

	p = buf;
	while ((s = strsep(&p, " \t\n"))) {
		len = strlen(s);
		if (len == 0)
			continue;
		ret = -ENAMETOOLONG;
		if (len >= AFSNAMEMAX)
			goto error;

		if (len >= 4 &&
		    s[len - 4] == '@' &&
		    s[len - 3] == 's' &&
		    s[len - 2] == 'y' &&
		    s[len - 1] == 's')
			/* Protect against recursion */
			goto invalid;

		if (s[0] == '.' &&
		    (len < 2 || (len == 2 && s[1] == '.')))
			goto invalid;

		if (memchr(s, '/', len))
			goto invalid;

		ret = -EFBIG;
		if (sysnames->nr >= AFS_NR_SYSNAME)
			goto out;

		if (strcmp(s, afs_init_sysname) == 0) {
			sub = (char *)afs_init_sysname;
		} else {
			ret = -ENOMEM;
			sub = kmemdup(s, len + 1, GFP_KERNEL);
			if (!sub)
				goto out;
		}

		sysnames->subs[sysnames->nr] = sub;
		sysnames->nr++;
	}

	if (sysnames->nr == 0) {
		sysnames->subs[0] = sysnames->blank;
		sysnames->nr++;
	}

	write_lock(&net->sysnames_lock);
	kill = net->sysnames;
	net->sysnames = sysnames;
	write_unlock(&net->sysnames_lock);
	ret = 0;
out:
	afs_put_sysnames(kill);
	return ret;

invalid:
	ret = -EINVAL;
error:
	goto out;
}

void afs_put_sysnames(struct afs_sysnames *sysnames)
{
	int i;

	if (sysnames && refcount_dec_and_test(&sysnames->usage)) {
		for (i = 0; i < sysnames->nr; i++)
			if (sysnames->subs[i] != afs_init_sysname &&
			    sysnames->subs[i] != sysnames->blank)
				kfree(sysnames->subs[i]);
	}
}

/*
 * Display general per-net namespace statistics
 */
static int afs_proc_stats_show(struct seq_file *m, void *v)
{
	struct afs_net *net = afs_seq2net_single(m);

	seq_puts(m, "kAFS statistics\n");

	seq_printf(m, "dir-mgmt: look=%u reval=%u inval=%u relpg=%u\n",
		   atomic_read(&net->n_lookup),
		   atomic_read(&net->n_reval),
		   atomic_read(&net->n_inval),
		   atomic_read(&net->n_relpg));

	seq_printf(m, "dir-data: rdpg=%u\n",
		   atomic_read(&net->n_read_dir));

	seq_printf(m, "dir-edit: cr=%u rm=%u\n",
		   atomic_read(&net->n_dir_cr),
		   atomic_read(&net->n_dir_rm));

	seq_printf(m, "file-rd : n=%u nb=%lu\n",
		   atomic_read(&net->n_fetches),
		   atomic_long_read(&net->n_fetch_bytes));
	seq_printf(m, "file-wr : n=%u nb=%lu\n",
		   atomic_read(&net->n_stores),
		   atomic_long_read(&net->n_store_bytes));
	return 0;
}

/*
 * initialise /proc/fs/afs/<cell>/
 */
int afs_proc_cell_setup(struct afs_cell *cell)
{
	struct proc_dir_entry *dir;
	struct afs_net *net = cell->net;

	_enter("%p{%s},%p", cell, cell->name, net->proc_afs);

	dir = proc_net_mkdir(net->net, cell->name, net->proc_afs);
	if (!dir)
		goto error_dir;

	if (!proc_create_net_data("vlservers", 0444, dir,
				  &afs_proc_cell_vlservers_ops,
				  sizeof(struct afs_vl_seq_net_private),
				  cell) ||
	    !proc_create_net_data("volumes", 0444, dir,
				  &afs_proc_cell_volumes_ops,
				  sizeof(struct seq_net_private),
				  cell))
		goto error_tree;

	_leave(" = 0");
	return 0;

error_tree:
	remove_proc_subtree(cell->name, net->proc_afs);
error_dir:
	_leave(" = -ENOMEM");
	return -ENOMEM;
}

/*
 * remove /proc/fs/afs/<cell>/
 */
void afs_proc_cell_remove(struct afs_cell *cell)
{
	struct afs_net *net = cell->net;

	_enter("");
	remove_proc_subtree(cell->name, net->proc_afs);
	_leave("");
}

/*
 * initialise the /proc/fs/afs/ directory
 */
int afs_proc_init(struct afs_net *net)
{
	struct proc_dir_entry *p;

	_enter("");

	p = proc_net_mkdir(net->net, "afs", net->net->proc_net);
	if (!p)
		goto error_dir;

	if (!proc_create_net_data_write("cells", 0644, p,
					&afs_proc_cells_ops,
					afs_proc_cells_write,
					sizeof(struct seq_net_private),
					NULL) ||
	    !proc_create_net_single_write("rootcell", 0644, p,
					  afs_proc_rootcell_show,
					  afs_proc_rootcell_write,
					  NULL) ||
	    !proc_create_net("servers", 0444, p, &afs_proc_servers_ops,
			     sizeof(struct seq_net_private)) ||
	    !proc_create_net_single("stats", 0444, p, afs_proc_stats_show, NULL) ||
	    !proc_create_net_data_write("sysname", 0644, p,
					&afs_proc_sysname_ops,
					afs_proc_sysname_write,
					sizeof(struct seq_net_private),
					NULL))
		goto error_tree;

	net->proc_afs = p;
	_leave(" = 0");
	return 0;

error_tree:
	proc_remove(p);
error_dir:
	_leave(" = -ENOMEM");
	return -ENOMEM;
}

/*
 * clean up the /proc/fs/afs/ directory
 */
void afs_proc_cleanup(struct afs_net *net)
{
	proc_remove(net->proc_afs);
	net->proc_afs = NULL;
}
Commit	Line	Data
ec26815a	1	/* /proc interface for AFS
1da177e4 LT	2	*
	3	* Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
	4	* Written by David Howells (dhowells@redhat.com)
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License
	8	* as published by the Free Software Foundation; either version
	9	* 2 of the License, or (at your option) any later version.
	10	*/
	11
1da177e4 LT	12	#include <linux/slab.h>
	13	#include <linux/module.h>
	14	#include <linux/proc_fs.h>
	15	#include <linux/seq_file.h>
e8edc6e0	16	#include <linux/sched.h>
7c0f6ba6	17	#include <linux/uaccess.h>
1da177e4 LT	18	#include "internal.h"
1da177e4 LT	19
0a5143f2 DH	20	struct afs_vl_seq_net_private {
	21	struct seq_net_private seq; /* Must be first */
	22	struct afs_vlserver_list *vllist;
	23	};
	24
5b86d4ff	25	static inline struct afs_net afs_seq2net(struct seq_file m)
f044c884	26	{
5b86d4ff	27	return afs_net(seq_file_net(m));
f044c884	28	}
1da177e4	29
5b86d4ff	30	static inline struct afs_net afs_seq2net_single(struct seq_file m)
f044c884	31	{
5b86d4ff	32	return afs_net(seq_file_single_net(m));
f044c884	33	}
1da177e4	34
f0691689	35	/*
5d9de25d	36	* Display the list of cells known to the namespace.
f0691689 DH	37	*/
	38	static int afs_proc_cells_show(struct seq_file m, void v)
	39	{
ded2f4c5 DH	40	struct afs_vlserver_list *vllist;
ded2f4c5 DH	41	struct afs_cell *cell;
f0691689	42
6b3944e4	43	if (v == SEQ_START_TOKEN) {
f0691689	44	/* display header on line 1 */
ded2f4c5	45	seq_puts(m, "USE TTL SV NAME\n");
f0691689 DH	46	return 0;
	47	}
	48
ded2f4c5 DH	49	cell = list_entry(v, struct afs_cell, proc_link);
	50	vllist = rcu_dereference(cell->vl_servers);
	51
f0691689	52	/* display one cell per line on subsequent lines */
ded2f4c5 DH	53	seq_printf(m, "%3u %6lld %2u %s\n",
	54	atomic_read(&cell->usage),
	55	cell->dns_expiry - ktime_get_real_seconds(),
	56	vllist ? vllist->nr_servers : 0,
	57	cell->name);
f0691689 DH	58	return 0;
	59	}
	60
1da177e4	61	static void afs_proc_cells_start(struct seq_file m, loff_t *_pos)
fe342cf7	62	__acquires(rcu)
1da177e4	63	{
989782dc	64	rcu_read_lock();
6b3944e4	65	return seq_hlist_start_head_rcu(&afs_seq2net(m)->proc_cells, *_pos);
ec26815a	66	}
1da177e4	67
f044c884	68	static void afs_proc_cells_next(struct seq_file m, void v, loff_t pos)
1da177e4	69	{
6b3944e4	70	return seq_hlist_next_rcu(v, &afs_seq2net(m)->proc_cells, pos);
ec26815a	71	}
1da177e4	72
f044c884	73	static void afs_proc_cells_stop(struct seq_file m, void v)
fe342cf7	74	__releases(rcu)
1da177e4	75	{
989782dc	76	rcu_read_unlock();
ec26815a	77	}
1da177e4	78
5d9de25d DH	79	static const struct seq_operations afs_proc_cells_ops = {
	80	.start = afs_proc_cells_start,
	81	.next = afs_proc_cells_next,
	82	.stop = afs_proc_cells_stop,
	83	.show = afs_proc_cells_show,
	84	};
	85
1da177e4 LT	86	/*
	87	* handle writes to /proc/fs/afs/cells
	88	* - to add cells: echo "add <cellname> <IP>[:<IP>][:<IP>]"
	89	*/
5b86d4ff	90	static int afs_proc_cells_write(struct file file, char buf, size_t size)
1da177e4	91	{
5b86d4ff DH	92	struct seq_file *m = file->private_data;
	93	struct afs_net *net = afs_seq2net(m);
	94	char name, args;
1da177e4 LT	95	int ret;
1da177e4 LT	96
1da177e4	97	/* trim to first NL */
5b86d4ff	98	name = memchr(buf, '\n', size);
1da177e4 LT	99	if (name)
	100	*name = 0;
	101
	102	/* split into command, name and argslist */
5b86d4ff	103	name = strchr(buf, ' ');
1da177e4 LT	104	if (!name)
	105	goto inval;
	106	do {
	107	*name++ = 0;
	108	} while(*name == ' ');
	109	if (!*name)
	110	goto inval;
	111
	112	args = strchr(name, ' ');
ecfe951f DH	113	if (args) {
	114	do {
	115	*args++ = 0;
	116	} while(*args == ' ');
	117	if (!*args)
	118	goto inval;
	119	}
1da177e4 LT	120
1da177e4 LT	121	/* determine command to perform */
5b86d4ff	122	_debug("cmd=%s name=%s args=%s", buf, name, args);
1da177e4	123
5b86d4ff	124	if (strcmp(buf, "add") == 0) {
1da177e4	125	struct afs_cell *cell;
08e0e7c8	126
989782dc	127	cell = afs_lookup_cell(net, name, strlen(name), args, true);
08e0e7c8 DH	128	if (IS_ERR(cell)) {
08e0e7c8 DH	129	ret = PTR_ERR(cell);
1da177e4	130	goto done;
08e0e7c8	131	}
1da177e4	132
17814aef DH	133	if (test_and_set_bit(AFS_CELL_FL_NO_GC, &cell->flags))
17814aef DH	134	afs_put_cell(net, cell);
ec26815a	135	} else {
1da177e4 LT	136	goto inval;
	137	}
	138
5b86d4ff	139	ret = 0;
1da177e4	140
ec26815a	141	done:
1da177e4 LT	142	_leave(" = %d", ret);
	143	return ret;
	144
ec26815a	145	inval:
1da177e4 LT	146	ret = -EINVAL;
	147	printk("kAFS: Invalid Command on /proc/fs/afs/cells file\n");
	148	goto done;
ec26815a	149	}
1da177e4	150
5d9de25d	151	/*
5b86d4ff	152	* Display the name of the current workstation cell.
5d9de25d	153	*/
5b86d4ff	154	static int afs_proc_rootcell_show(struct seq_file m, void v)
1da177e4	155	{
37ab6368	156	struct afs_cell *cell;
5b86d4ff DH	157	struct afs_net *net;
	158
	159	net = afs_seq2net_single(m);
	160	if (rcu_access_pointer(net->ws_cell)) {
	161	rcu_read_lock();
	162	cell = rcu_dereference(net->ws_cell);
	163	if (cell)
	164	seq_printf(m, "%s\n", cell->name);
	165	rcu_read_unlock();
	166	}
	167	return 0;
1da177e4 LT	168	}
1da177e4 LT	169
1da177e4	170	/*
5d9de25d DH	171	* Set the current workstation cell and optionally supply its list of volume
	172	* location servers.
	173	*
	174	* echo "cell.name:192.168.231.14" >/proc/fs/afs/rootcell
1da177e4	175	*/
5b86d4ff	176	static int afs_proc_rootcell_write(struct file file, char buf, size_t size)
1da177e4	177	{
5b86d4ff DH	178	struct seq_file *m = file->private_data;
	179	struct afs_net *net = afs_seq2net_single(m);
	180	char *s;
1da177e4 LT	181	int ret;
1da177e4 LT	182
6f8880d8	183	ret = -EINVAL;
5b86d4ff	184	if (buf[0] == '.')
6f8880d8	185	goto out;
5b86d4ff	186	if (memchr(buf, '/', size))
6f8880d8 DH	187	goto out;
6f8880d8 DH	188
1da177e4	189	/* trim to first NL */
5b86d4ff	190	s = memchr(buf, '\n', size);
1da177e4 LT	191	if (s)
	192	*s = 0;
	193
	194	/* determine command to perform */
5b86d4ff	195	_debug("rootcell=%s", buf);
1da177e4	196
5b86d4ff	197	ret = afs_cell_init(net, buf);
1da177e4	198
6f8880d8	199	out:
1da177e4 LT	200	_leave(" = %d", ret);
1da177e4 LT	201	return ret;
ec26815a	202	}
1da177e4	203
f0691689 DH	204	static const char afs_vol_types[3][3] = {
	205	[AFSVL_RWVOL] = "RW",
	206	[AFSVL_ROVOL] = "RO",
	207	[AFSVL_BACKVOL] = "BK",
	208	};
	209
	210	/*
5d9de25d	211	* Display the list of volumes known to a cell.
f0691689 DH	212	*/
	213	static int afs_proc_cell_volumes_show(struct seq_file m, void v)
	214	{
	215	struct afs_cell *cell = PDE_DATA(file_inode(m->file));
	216	struct afs_volume *vol = list_entry(v, struct afs_volume, proc_link);
	217
	218	/* Display header on line 1 */
	219	if (v == &cell->proc_volumes) {
	220	seq_puts(m, "USE VID TY\n");
	221	return 0;
	222	}
	223
3b6492df	224	seq_printf(m, "%3d %08llx %s\n",
f0691689 DH	225	atomic_read(&vol->usage), vol->vid,
	226	afs_vol_types[vol->type]);
	227
	228	return 0;
	229	}
	230
1da177e4	231	static void afs_proc_cell_volumes_start(struct seq_file m, loff_t *_pos)
fe342cf7	232	__acquires(cell->proc_lock)
1da177e4	233	{
353861cf	234	struct afs_cell *cell = PDE_DATA(file_inode(m->file));
1da177e4	235
d2ddc776 DH	236	read_lock(&cell->proc_lock);
d2ddc776 DH	237	return seq_list_start_head(&cell->proc_volumes, *_pos);
ec26815a	238	}
1da177e4	239
5b86d4ff	240	static void afs_proc_cell_volumes_next(struct seq_file m, void *v,
1da177e4 LT	241	loff_t *_pos)
1da177e4 LT	242	{
5b86d4ff	243	struct afs_cell *cell = PDE_DATA(file_inode(m->file));
1da177e4	244
d2ddc776	245	return seq_list_next(v, &cell->proc_volumes, _pos);
ec26815a	246	}
1da177e4	247
5b86d4ff	248	static void afs_proc_cell_volumes_stop(struct seq_file m, void v)
fe342cf7	249	__releases(cell->proc_lock)
1da177e4	250	{
5b86d4ff	251	struct afs_cell *cell = PDE_DATA(file_inode(m->file));
1da177e4	252
d2ddc776	253	read_unlock(&cell->proc_lock);
ec26815a	254	}
1da177e4	255
5d9de25d DH	256	static const struct seq_operations afs_proc_cell_volumes_ops = {
	257	.start = afs_proc_cell_volumes_start,
	258	.next = afs_proc_cell_volumes_next,
	259	.stop = afs_proc_cell_volumes_stop,
	260	.show = afs_proc_cell_volumes_show,
	261	};
	262
0a5143f2 DH	263	static const char *const dns_record_sources[NR__dns_record_source + 1] = {
	264	[DNS_RECORD_UNAVAILABLE] = "unav",
	265	[DNS_RECORD_FROM_CONFIG] = "cfg",
	266	[DNS_RECORD_FROM_DNS_A] = "A",
	267	[DNS_RECORD_FROM_DNS_AFSDB] = "AFSDB",
	268	[DNS_RECORD_FROM_DNS_SRV] = "SRV",
	269	[DNS_RECORD_FROM_NSS] = "nss",
	270	[NR__dns_record_source] = "[weird]"
	271	};
	272
	273	static const char *const dns_lookup_statuses[NR__dns_lookup_status + 1] = {
	274	[DNS_LOOKUP_NOT_DONE] = "no-lookup",
	275	[DNS_LOOKUP_GOOD] = "good",
	276	[DNS_LOOKUP_GOOD_WITH_BAD] = "good/bad",
	277	[DNS_LOOKUP_BAD] = "bad",
	278	[DNS_LOOKUP_GOT_NOT_FOUND] = "not-found",
	279	[DNS_LOOKUP_GOT_LOCAL_FAILURE] = "local-failure",
	280	[DNS_LOOKUP_GOT_TEMP_FAILURE] = "temp-failure",
	281	[DNS_LOOKUP_GOT_NS_FAILURE] = "ns-failure",
	282	[NR__dns_lookup_status] = "[weird]"
	283	};
	284
1da177e4	285	/*
5d9de25d	286	* Display the list of Volume Location servers we're using for a cell.
1da177e4	287	*/
f0691689	288	static int afs_proc_cell_vlservers_show(struct seq_file m, void v)
1da177e4	289	{
0a5143f2 DH	290	const struct afs_vl_seq_net_private *priv = m->private;
	291	const struct afs_vlserver_list *vllist = priv->vllist;
	292	const struct afs_vlserver_entry *entry;
	293	const struct afs_vlserver *vlserver;
	294	const struct afs_addr_list *alist;
	295	int i;
1da177e4	296
0a5143f2 DH	297	if (v == SEQ_START_TOKEN) {
	298	seq_printf(m, "# source %s, status %s\n",
	299	dns_record_sources[vllist->source],
	300	dns_lookup_statuses[vllist->status]);
1da177e4 LT	301	return 0;
	302	}
	303
0a5143f2 DH	304	entry = v;
	305	vlserver = entry->server;
	306	alist = rcu_dereference(vlserver->addresses);
	307
	308	seq_printf(m, "%s [p=%hu w=%hu s=%s,%s]:\n",
	309	vlserver->name, entry->priority, entry->weight,
	310	dns_record_sources[alist ? alist->source : entry->source],
	311	dns_lookup_statuses[alist ? alist->status : entry->status]);
	312	if (alist) {
	313	for (i = 0; i < alist->nr_addrs; i++)
	314	seq_printf(m, " %c %pISpc\n",
3bf0fb6f	315	alist->preferred == i ? '>' : '-',
0a5143f2 DH	316	&alist->addrs[i].transport);
0a5143f2 DH	317	}
1da177e4	318	return 0;
ec26815a	319	}
1da177e4	320
1da177e4	321	static void afs_proc_cell_vlservers_start(struct seq_file m, loff_t *_pos)
fe342cf7	322	__acquires(rcu)
1da177e4	323	{
0a5143f2 DH	324	struct afs_vl_seq_net_private *priv = m->private;
0a5143f2 DH	325	struct afs_vlserver_list *vllist;
353861cf	326	struct afs_cell *cell = PDE_DATA(file_inode(m->file));
1da177e4 LT	327	loff_t pos = *_pos;
1da177e4 LT	328
8b2a464c	329	rcu_read_lock();
1da177e4	330
0a5143f2 DH	331	vllist = rcu_dereference(cell->vl_servers);
0a5143f2 DH	332	priv->vllist = vllist;
1da177e4	333
0a5143f2 DH	334	if (pos < 0)
	335	*_pos = pos = 0;
	336	if (pos == 0)
	337	return SEQ_START_TOKEN;
1da177e4	338
0a5143f2	339	if (!vllist \|\| pos - 1 >= vllist->nr_servers)
1da177e4 LT	340	return NULL;
1da177e4 LT	341
0a5143f2	342	return &vllist->servers[pos - 1];
ec26815a	343	}
1da177e4	344
5b86d4ff	345	static void afs_proc_cell_vlservers_next(struct seq_file m, void *v,
1da177e4 LT	346	loff_t *_pos)
1da177e4 LT	347	{
0a5143f2 DH	348	struct afs_vl_seq_net_private *priv = m->private;
0a5143f2 DH	349	struct afs_vlserver_list *vllist = priv->vllist;
1da177e4 LT	350	loff_t pos;
1da177e4 LT	351
1da177e4	352	pos = *_pos;
0a5143f2 DH	353	pos++;
	354	*_pos = pos;
	355	if (!vllist \|\| pos - 1 >= vllist->nr_servers)
1da177e4 LT	356	return NULL;
1da177e4 LT	357
0a5143f2	358	return &vllist->servers[pos - 1];
ec26815a	359	}
1da177e4	360
5b86d4ff	361	static void afs_proc_cell_vlservers_stop(struct seq_file m, void v)
fe342cf7	362	__releases(rcu)
1da177e4	363	{
8b2a464c	364	rcu_read_unlock();
ec26815a	365	}
1da177e4	366
5d9de25d DH	367	static const struct seq_operations afs_proc_cell_vlservers_ops = {
	368	.start = afs_proc_cell_vlservers_start,
	369	.next = afs_proc_cell_vlservers_next,
	370	.stop = afs_proc_cell_vlservers_stop,
	371	.show = afs_proc_cell_vlservers_show,
	372	};
	373
1da177e4	374	/*
5d9de25d	375	* Display the list of fileservers we're using within a namespace.
1da177e4	376	*/
f0691689	377	static int afs_proc_servers_show(struct seq_file m, void v)
1da177e4	378	{
f0691689 DH	379	struct afs_server *server;
f0691689 DH	380	struct afs_addr_list *alist;
0aac4bce	381	int i;
1da177e4	382
f0691689 DH	383	if (v == SEQ_START_TOKEN) {
f0691689 DH	384	seq_puts(m, "UUID USE ADDR\n");
1da177e4 LT	385	return 0;
	386	}
	387
f0691689 DH	388	server = list_entry(v, struct afs_server, proc_link);
f0691689 DH	389	alist = rcu_dereference(server->addresses);
0aac4bce	390	seq_printf(m, "%pU %3d %pISpc%s\n",
f0691689 DH	391	&server->uuid,
f0691689 DH	392	atomic_read(&server->usage),
0aac4bce	393	&alist->addrs[0].transport,
3bf0fb6f	394	alist->preferred == 0 ? "*" : "");
0aac4bce DH	395	for (i = 1; i < alist->nr_addrs; i++)
	396	seq_printf(m, " %pISpc%s\n",
	397	&alist->addrs[i].transport,
3bf0fb6f	398	alist->preferred == i ? "*" : "");
1da177e4	399	return 0;
ec26815a	400	}
1da177e4	401
d2ddc776	402	static void afs_proc_servers_start(struct seq_file m, loff_t *_pos)
fe342cf7	403	__acquires(rcu)
1da177e4	404	{
d2ddc776	405	rcu_read_lock();
5d9de25d	406	return seq_hlist_start_head_rcu(&afs_seq2net(m)->fs_proc, *_pos);
ec26815a	407	}
1da177e4	408
d2ddc776	409	static void afs_proc_servers_next(struct seq_file m, void v, loff_t _pos)
1da177e4	410	{
5d9de25d	411	return seq_hlist_next_rcu(v, &afs_seq2net(m)->fs_proc, _pos);
ec26815a	412	}
1da177e4	413
5b86d4ff	414	static void afs_proc_servers_stop(struct seq_file m, void v)
fe342cf7	415	__releases(rcu)
1da177e4	416	{
d2ddc776	417	rcu_read_unlock();
ec26815a	418	}
1da177e4	419
5d9de25d DH	420	static const struct seq_operations afs_proc_servers_ops = {
	421	.start = afs_proc_servers_start,
	422	.next = afs_proc_servers_next,
	423	.stop = afs_proc_servers_stop,
	424	.show = afs_proc_servers_show,
	425	};
6f8880d8	426
6f8880d8	427	/*
5d9de25d DH	428	* Display the list of strings that may be substituted for the @sys pathname
5d9de25d DH	429	* macro.
6f8880d8	430	*/
5d9de25d	431	static int afs_proc_sysname_show(struct seq_file m, void v)
6f8880d8	432	{
5d9de25d DH	433	struct afs_net *net = afs_seq2net(m);
	434	struct afs_sysnames *sysnames = net->sysnames;
	435	unsigned int i = (unsigned long)v - 1;
6f8880d8	436
5d9de25d DH	437	if (i < sysnames->nr)
	438	seq_printf(m, "%s\n", sysnames->subs[i]);
	439	return 0;
	440	}
6f8880d8	441
5d9de25d DH	442	static void afs_proc_sysname_start(struct seq_file m, loff_t *pos)
	443	__acquires(&net->sysnames_lock)
	444	{
	445	struct afs_net *net = afs_seq2net(m);
5b86d4ff	446	struct afs_sysnames *names;
6f8880d8	447
5d9de25d	448	read_lock(&net->sysnames_lock);
6f8880d8	449
5b86d4ff	450	names = net->sysnames;
5d9de25d DH	451	if (*pos >= names->nr)
	452	return NULL;
	453	return (void )(unsigned long)(pos + 1);
	454	}
	455
	456	static void afs_proc_sysname_next(struct seq_file m, void v, loff_t pos)
	457	{
	458	struct afs_net *net = afs_seq2net(m);
	459	struct afs_sysnames *names = net->sysnames;
	460
	461	*pos += 1;
	462	if (*pos >= names->nr)
	463	return NULL;
	464	return (void )(unsigned long)(pos + 1);
	465	}
	466
	467	static void afs_proc_sysname_stop(struct seq_file m, void v)
	468	__releases(&net->sysnames_lock)
	469	{
	470	struct afs_net *net = afs_seq2net(m);
	471
	472	read_unlock(&net->sysnames_lock);
6f8880d8 DH	473	}
6f8880d8 DH	474
5d9de25d DH	475	static const struct seq_operations afs_proc_sysname_ops = {
	476	.start = afs_proc_sysname_start,
	477	.next = afs_proc_sysname_next,
	478	.stop = afs_proc_sysname_stop,
	479	.show = afs_proc_sysname_show,
	480	};
	481
6f8880d8	482	/*
5d9de25d	483	* Allow the @sys substitution to be configured.
6f8880d8	484	*/
5b86d4ff	485	static int afs_proc_sysname_write(struct file file, char buf, size_t size)
6f8880d8	486	{
5b86d4ff	487	struct afs_sysnames sysnames, kill;
6f8880d8	488	struct seq_file *m = file->private_data;
5b86d4ff DH	489	struct afs_net *net = afs_seq2net(m);
5b86d4ff DH	490	char s, p, *sub;
6f8880d8 DH	491	int ret, len;
6f8880d8 DH	492
5b86d4ff	493	sysnames = kzalloc(sizeof(*sysnames), GFP_KERNEL);
6f8880d8	494	if (!sysnames)
5b86d4ff DH	495	return -ENOMEM;
	496	refcount_set(&sysnames->usage, 1);
	497	kill = sysnames;
6f8880d8	498
5b86d4ff	499	p = buf;
6f8880d8 DH	500	while ((s = strsep(&p, " \t\n"))) {
	501	len = strlen(s);
	502	if (len == 0)
	503	continue;
	504	ret = -ENAMETOOLONG;
	505	if (len >= AFSNAMEMAX)
	506	goto error;
	507
	508	if (len >= 4 &&
	509	s[len - 4] == '@' &&
	510	s[len - 3] == 's' &&
	511	s[len - 2] == 'y' &&
	512	s[len - 1] == 's')
	513	/* Protect against recursion */
	514	goto invalid;
	515
	516	if (s[0] == '.' &&
	517	(len < 2 \|\| (len == 2 && s[1] == '.')))
	518	goto invalid;
	519
	520	if (memchr(s, '/', len))
	521	goto invalid;
	522
	523	ret = -EFBIG;
	524	if (sysnames->nr >= AFS_NR_SYSNAME)
	525	goto out;
	526
	527	if (strcmp(s, afs_init_sysname) == 0) {
	528	sub = (char *)afs_init_sysname;
	529	} else {
	530	ret = -ENOMEM;
	531	sub = kmemdup(s, len + 1, GFP_KERNEL);
	532	if (!sub)
	533	goto out;
	534	}
	535
	536	sysnames->subs[sysnames->nr] = sub;
	537	sysnames->nr++;
	538	}
	539
5b86d4ff DH	540	if (sysnames->nr == 0) {
	541	sysnames->subs[0] = sysnames->blank;
	542	sysnames->nr++;
	543	}
	544
	545	write_lock(&net->sysnames_lock);
	546	kill = net->sysnames;
	547	net->sysnames = sysnames;
	548	write_unlock(&net->sysnames_lock);
	549	ret = 0;
6f8880d8	550	out:
5b86d4ff	551	afs_put_sysnames(kill);
6f8880d8 DH	552	return ret;
	553
	554	invalid:
	555	ret = -EINVAL;
	556	error:
6f8880d8 DH	557	goto out;
	558	}
	559
5d9de25d DH	560	void afs_put_sysnames(struct afs_sysnames *sysnames)
	561	{
	562	int i;
	563
	564	if (sysnames && refcount_dec_and_test(&sysnames->usage)) {
	565	for (i = 0; i < sysnames->nr; i++)
	566	if (sysnames->subs[i] != afs_init_sysname &&
	567	sysnames->subs[i] != sysnames->blank)
	568	kfree(sysnames->subs[i]);
	569	}
	570	}
	571
d55b4da4 DH	572	/*
	573	* Display general per-net namespace statistics
	574	*/
	575	static int afs_proc_stats_show(struct seq_file m, void v)
	576	{
5b86d4ff	577	struct afs_net *net = afs_seq2net_single(m);
d55b4da4 DH	578
	579	seq_puts(m, "kAFS statistics\n");
	580
f3ddee8d	581	seq_printf(m, "dir-mgmt: look=%u reval=%u inval=%u relpg=%u\n",
d55b4da4 DH	582	atomic_read(&net->n_lookup),
d55b4da4 DH	583	atomic_read(&net->n_reval),
f3ddee8d DH	584	atomic_read(&net->n_inval),
f3ddee8d DH	585	atomic_read(&net->n_relpg));
d55b4da4 DH	586
	587	seq_printf(m, "dir-data: rdpg=%u\n",
	588	atomic_read(&net->n_read_dir));
63a4681f DH	589
	590	seq_printf(m, "dir-edit: cr=%u rm=%u\n",
	591	atomic_read(&net->n_dir_cr),
	592	atomic_read(&net->n_dir_rm));
76a5cb6f DH	593
	594	seq_printf(m, "file-rd : n=%u nb=%lu\n",
	595	atomic_read(&net->n_fetches),
	596	atomic_long_read(&net->n_fetch_bytes));
	597	seq_printf(m, "file-wr : n=%u nb=%lu\n",
	598	atomic_read(&net->n_stores),
	599	atomic_long_read(&net->n_store_bytes));
d55b4da4 DH	600	return 0;
d55b4da4 DH	601	}
10495a00 DH	602
	603	/*
	604	* initialise /proc/fs/afs/<cell>/
	605	*/
5b86d4ff	606	int afs_proc_cell_setup(struct afs_cell *cell)
10495a00 DH	607	{
10495a00 DH	608	struct proc_dir_entry *dir;
5b86d4ff	609	struct afs_net *net = cell->net;
10495a00 DH	610
	611	_enter("%p{%s},%p", cell, cell->name, net->proc_afs);
	612
5b86d4ff	613	dir = proc_net_mkdir(net->net, cell->name, net->proc_afs);
10495a00 DH	614	if (!dir)
	615	goto error_dir;
	616
5b86d4ff DH	617	if (!proc_create_net_data("vlservers", 0444, dir,
5b86d4ff DH	618	&afs_proc_cell_vlservers_ops,
0a5143f2	619	sizeof(struct afs_vl_seq_net_private),
5b86d4ff DH	620	cell) \|\|
	621	!proc_create_net_data("volumes", 0444, dir,
	622	&afs_proc_cell_volumes_ops,
	623	sizeof(struct seq_net_private),
	624	cell))
10495a00 DH	625	goto error_tree;
	626
	627	_leave(" = 0");
	628	return 0;
	629
	630	error_tree:
	631	remove_proc_subtree(cell->name, net->proc_afs);
	632	error_dir:
	633	_leave(" = -ENOMEM");
	634	return -ENOMEM;
	635	}
	636
	637	/*
	638	* remove /proc/fs/afs/<cell>/
	639	*/
5b86d4ff	640	void afs_proc_cell_remove(struct afs_cell *cell)
10495a00	641	{
5b86d4ff	642	struct afs_net *net = cell->net;
10495a00	643
5b86d4ff	644	_enter("");
10495a00	645	remove_proc_subtree(cell->name, net->proc_afs);
10495a00 DH	646	_leave("");
	647	}
	648
	649	/*
	650	* initialise the /proc/fs/afs/ directory
	651	*/
	652	int afs_proc_init(struct afs_net *net)
	653	{
5b86d4ff DH	654	struct proc_dir_entry *p;
5b86d4ff DH	655
10495a00 DH	656	_enter("");
10495a00 DH	657
5b86d4ff DH	658	p = proc_net_mkdir(net->net, "afs", net->net->proc_net);
5b86d4ff DH	659	if (!p)
10495a00 DH	660	goto error_dir;
10495a00 DH	661
5b86d4ff DH	662	if (!proc_create_net_data_write("cells", 0644, p,
	663	&afs_proc_cells_ops,
	664	afs_proc_cells_write,
	665	sizeof(struct seq_net_private),
	666	NULL) \|\|
	667	!proc_create_net_single_write("rootcell", 0644, p,
	668	afs_proc_rootcell_show,
	669	afs_proc_rootcell_write,
	670	NULL) \|\|
	671	!proc_create_net("servers", 0444, p, &afs_proc_servers_ops,
	672	sizeof(struct seq_net_private)) \|\|
	673	!proc_create_net_single("stats", 0444, p, afs_proc_stats_show, NULL) \|\|
	674	!proc_create_net_data_write("sysname", 0644, p,
	675	&afs_proc_sysname_ops,
	676	afs_proc_sysname_write,
	677	sizeof(struct seq_net_private),
	678	NULL))
10495a00 DH	679	goto error_tree;
10495a00 DH	680
5b86d4ff	681	net->proc_afs = p;
10495a00 DH	682	_leave(" = 0");
	683	return 0;
	684
	685	error_tree:
5b86d4ff	686	proc_remove(p);
10495a00 DH	687	error_dir:
	688	_leave(" = -ENOMEM");
	689	return -ENOMEM;
	690	}
	691
	692	/*
	693	* clean up the /proc/fs/afs/ directory
	694	*/
	695	void afs_proc_cleanup(struct afs_net *net)
	696	{
	697	proc_remove(net->proc_afs);
	698	net->proc_afs = NULL;
	699	}