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

// SPDX-License-Identifier: GPL-2.0-or-later
/* /proc interface for AFS
 *
 * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 */

#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->nr_servers,
		   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 ? vllist->source : 0],
			   dns_lookup_statuses[vllist ? vllist->status : 0]);
		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 (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
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
ec26815a	2	/* /proc interface for AFS
1da177e4 LT	3	*
	4	* Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
	5	* Written by David Howells (dhowells@redhat.com)
1da177e4 LT	6	*/
1da177e4 LT	7
1da177e4 LT	8	#include <linux/slab.h>
	9	#include <linux/module.h>
	10	#include <linux/proc_fs.h>
	11	#include <linux/seq_file.h>
e8edc6e0	12	#include <linux/sched.h>
7c0f6ba6	13	#include <linux/uaccess.h>
1da177e4 LT	14	#include "internal.h"
1da177e4 LT	15
0a5143f2 DH	16	struct afs_vl_seq_net_private {
	17	struct seq_net_private seq; /* Must be first */
	18	struct afs_vlserver_list *vllist;
	19	};
	20
5b86d4ff	21	static inline struct afs_net afs_seq2net(struct seq_file m)
f044c884	22	{
5b86d4ff	23	return afs_net(seq_file_net(m));
f044c884	24	}
1da177e4	25
5b86d4ff	26	static inline struct afs_net afs_seq2net_single(struct seq_file m)
f044c884	27	{
5b86d4ff	28	return afs_net(seq_file_single_net(m));
f044c884	29	}
1da177e4	30
f0691689	31	/*
5d9de25d	32	* Display the list of cells known to the namespace.
f0691689 DH	33	*/
	34	static int afs_proc_cells_show(struct seq_file m, void v)
	35	{
ded2f4c5 DH	36	struct afs_vlserver_list *vllist;
ded2f4c5 DH	37	struct afs_cell *cell;
f0691689	38
6b3944e4	39	if (v == SEQ_START_TOKEN) {
f0691689	40	/* display header on line 1 */
ded2f4c5	41	seq_puts(m, "USE TTL SV NAME\n");
f0691689 DH	42	return 0;
	43	}
	44
ded2f4c5 DH	45	cell = list_entry(v, struct afs_cell, proc_link);
	46	vllist = rcu_dereference(cell->vl_servers);
	47
f0691689	48	/* display one cell per line on subsequent lines */
ded2f4c5 DH	49	seq_printf(m, "%3u %6lld %2u %s\n",
	50	atomic_read(&cell->usage),
	51	cell->dns_expiry - ktime_get_real_seconds(),
ca1cbbdc	52	vllist->nr_servers,
ded2f4c5	53	cell->name);
f0691689 DH	54	return 0;
	55	}
	56
1da177e4	57	static void afs_proc_cells_start(struct seq_file m, loff_t *_pos)
fe342cf7	58	__acquires(rcu)
1da177e4	59	{
989782dc	60	rcu_read_lock();
6b3944e4	61	return seq_hlist_start_head_rcu(&afs_seq2net(m)->proc_cells, *_pos);
ec26815a	62	}
1da177e4	63
f044c884	64	static void afs_proc_cells_next(struct seq_file m, void v, loff_t pos)
1da177e4	65	{
6b3944e4	66	return seq_hlist_next_rcu(v, &afs_seq2net(m)->proc_cells, pos);
ec26815a	67	}
1da177e4	68
f044c884	69	static void afs_proc_cells_stop(struct seq_file m, void v)
fe342cf7	70	__releases(rcu)
1da177e4	71	{
989782dc	72	rcu_read_unlock();
ec26815a	73	}
1da177e4	74
5d9de25d DH	75	static const struct seq_operations afs_proc_cells_ops = {
	76	.start = afs_proc_cells_start,
	77	.next = afs_proc_cells_next,
	78	.stop = afs_proc_cells_stop,
	79	.show = afs_proc_cells_show,
	80	};
	81
1da177e4 LT	82	/*
	83	* handle writes to /proc/fs/afs/cells
	84	* - to add cells: echo "add <cellname> <IP>[:<IP>][:<IP>]"
	85	*/
5b86d4ff	86	static int afs_proc_cells_write(struct file file, char buf, size_t size)
1da177e4	87	{
5b86d4ff DH	88	struct seq_file *m = file->private_data;
	89	struct afs_net *net = afs_seq2net(m);
	90	char name, args;
1da177e4 LT	91	int ret;
1da177e4 LT	92
1da177e4	93	/* trim to first NL */
5b86d4ff	94	name = memchr(buf, '\n', size);
1da177e4 LT	95	if (name)
	96	*name = 0;
	97
	98	/* split into command, name and argslist */
5b86d4ff	99	name = strchr(buf, ' ');
1da177e4 LT	100	if (!name)
	101	goto inval;
	102	do {
	103	*name++ = 0;
	104	} while(*name == ' ');
	105	if (!*name)
	106	goto inval;
	107
	108	args = strchr(name, ' ');
ecfe951f DH	109	if (args) {
	110	do {
	111	*args++ = 0;
	112	} while(*args == ' ');
	113	if (!*args)
	114	goto inval;
	115	}
1da177e4 LT	116
1da177e4 LT	117	/* determine command to perform */
5b86d4ff	118	_debug("cmd=%s name=%s args=%s", buf, name, args);
1da177e4	119
5b86d4ff	120	if (strcmp(buf, "add") == 0) {
1da177e4	121	struct afs_cell *cell;
08e0e7c8	122
989782dc	123	cell = afs_lookup_cell(net, name, strlen(name), args, true);
08e0e7c8 DH	124	if (IS_ERR(cell)) {
08e0e7c8 DH	125	ret = PTR_ERR(cell);
1da177e4	126	goto done;
08e0e7c8	127	}
1da177e4	128
17814aef DH	129	if (test_and_set_bit(AFS_CELL_FL_NO_GC, &cell->flags))
17814aef DH	130	afs_put_cell(net, cell);
ec26815a	131	} else {
1da177e4 LT	132	goto inval;
	133	}
	134
5b86d4ff	135	ret = 0;
1da177e4	136
ec26815a	137	done:
1da177e4 LT	138	_leave(" = %d", ret);
	139	return ret;
	140
ec26815a	141	inval:
1da177e4 LT	142	ret = -EINVAL;
	143	printk("kAFS: Invalid Command on /proc/fs/afs/cells file\n");
	144	goto done;
ec26815a	145	}
1da177e4	146
5d9de25d	147	/*
5b86d4ff	148	* Display the name of the current workstation cell.
5d9de25d	149	*/
5b86d4ff	150	static int afs_proc_rootcell_show(struct seq_file m, void v)
1da177e4	151	{
37ab6368	152	struct afs_cell *cell;
5b86d4ff DH	153	struct afs_net *net;
	154
	155	net = afs_seq2net_single(m);
	156	if (rcu_access_pointer(net->ws_cell)) {
	157	rcu_read_lock();
	158	cell = rcu_dereference(net->ws_cell);
	159	if (cell)
	160	seq_printf(m, "%s\n", cell->name);
	161	rcu_read_unlock();
	162	}
	163	return 0;
1da177e4 LT	164	}
1da177e4 LT	165
1da177e4	166	/*
5d9de25d DH	167	* Set the current workstation cell and optionally supply its list of volume
	168	* location servers.
	169	*
	170	* echo "cell.name:192.168.231.14" >/proc/fs/afs/rootcell
1da177e4	171	*/
5b86d4ff	172	static int afs_proc_rootcell_write(struct file file, char buf, size_t size)
1da177e4	173	{
5b86d4ff DH	174	struct seq_file *m = file->private_data;
	175	struct afs_net *net = afs_seq2net_single(m);
	176	char *s;
1da177e4 LT	177	int ret;
1da177e4 LT	178
6f8880d8	179	ret = -EINVAL;
5b86d4ff	180	if (buf[0] == '.')
6f8880d8	181	goto out;
5b86d4ff	182	if (memchr(buf, '/', size))
6f8880d8 DH	183	goto out;
6f8880d8 DH	184
1da177e4	185	/* trim to first NL */
5b86d4ff	186	s = memchr(buf, '\n', size);
1da177e4 LT	187	if (s)
	188	*s = 0;
	189
	190	/* determine command to perform */
5b86d4ff	191	_debug("rootcell=%s", buf);
1da177e4	192
5b86d4ff	193	ret = afs_cell_init(net, buf);
1da177e4	194
6f8880d8	195	out:
1da177e4 LT	196	_leave(" = %d", ret);
1da177e4 LT	197	return ret;
ec26815a	198	}
1da177e4	199
f0691689 DH	200	static const char afs_vol_types[3][3] = {
	201	[AFSVL_RWVOL] = "RW",
	202	[AFSVL_ROVOL] = "RO",
	203	[AFSVL_BACKVOL] = "BK",
	204	};
	205
	206	/*
5d9de25d	207	* Display the list of volumes known to a cell.
f0691689 DH	208	*/
	209	static int afs_proc_cell_volumes_show(struct seq_file m, void v)
	210	{
	211	struct afs_cell *cell = PDE_DATA(file_inode(m->file));
	212	struct afs_volume *vol = list_entry(v, struct afs_volume, proc_link);
	213
	214	/* Display header on line 1 */
	215	if (v == &cell->proc_volumes) {
	216	seq_puts(m, "USE VID TY\n");
	217	return 0;
	218	}
	219
3b6492df	220	seq_printf(m, "%3d %08llx %s\n",
f0691689 DH	221	atomic_read(&vol->usage), vol->vid,
	222	afs_vol_types[vol->type]);
	223
	224	return 0;
	225	}
	226
1da177e4	227	static void afs_proc_cell_volumes_start(struct seq_file m, loff_t *_pos)
fe342cf7	228	__acquires(cell->proc_lock)
1da177e4	229	{
353861cf	230	struct afs_cell *cell = PDE_DATA(file_inode(m->file));
1da177e4	231
d2ddc776 DH	232	read_lock(&cell->proc_lock);
d2ddc776 DH	233	return seq_list_start_head(&cell->proc_volumes, *_pos);
ec26815a	234	}
1da177e4	235
5b86d4ff	236	static void afs_proc_cell_volumes_next(struct seq_file m, void *v,
1da177e4 LT	237	loff_t *_pos)
1da177e4 LT	238	{
5b86d4ff	239	struct afs_cell *cell = PDE_DATA(file_inode(m->file));
1da177e4	240
d2ddc776	241	return seq_list_next(v, &cell->proc_volumes, _pos);
ec26815a	242	}
1da177e4	243
5b86d4ff	244	static void afs_proc_cell_volumes_stop(struct seq_file m, void v)
fe342cf7	245	__releases(cell->proc_lock)
1da177e4	246	{
5b86d4ff	247	struct afs_cell *cell = PDE_DATA(file_inode(m->file));
1da177e4	248
d2ddc776	249	read_unlock(&cell->proc_lock);
ec26815a	250	}
1da177e4	251
5d9de25d DH	252	static const struct seq_operations afs_proc_cell_volumes_ops = {
	253	.start = afs_proc_cell_volumes_start,
	254	.next = afs_proc_cell_volumes_next,
	255	.stop = afs_proc_cell_volumes_stop,
	256	.show = afs_proc_cell_volumes_show,
	257	};
	258
0a5143f2 DH	259	static const char *const dns_record_sources[NR__dns_record_source + 1] = {
	260	[DNS_RECORD_UNAVAILABLE] = "unav",
	261	[DNS_RECORD_FROM_CONFIG] = "cfg",
	262	[DNS_RECORD_FROM_DNS_A] = "A",
	263	[DNS_RECORD_FROM_DNS_AFSDB] = "AFSDB",
	264	[DNS_RECORD_FROM_DNS_SRV] = "SRV",
	265	[DNS_RECORD_FROM_NSS] = "nss",
	266	[NR__dns_record_source] = "[weird]"
	267	};
	268
	269	static const char *const dns_lookup_statuses[NR__dns_lookup_status + 1] = {
	270	[DNS_LOOKUP_NOT_DONE] = "no-lookup",
	271	[DNS_LOOKUP_GOOD] = "good",
	272	[DNS_LOOKUP_GOOD_WITH_BAD] = "good/bad",
	273	[DNS_LOOKUP_BAD] = "bad",
	274	[DNS_LOOKUP_GOT_NOT_FOUND] = "not-found",
	275	[DNS_LOOKUP_GOT_LOCAL_FAILURE] = "local-failure",
	276	[DNS_LOOKUP_GOT_TEMP_FAILURE] = "temp-failure",
	277	[DNS_LOOKUP_GOT_NS_FAILURE] = "ns-failure",
	278	[NR__dns_lookup_status] = "[weird]"
	279	};
	280
1da177e4	281	/*
5d9de25d	282	* Display the list of Volume Location servers we're using for a cell.
1da177e4	283	*/
f0691689	284	static int afs_proc_cell_vlservers_show(struct seq_file m, void v)
1da177e4	285	{
0a5143f2 DH	286	const struct afs_vl_seq_net_private *priv = m->private;
	287	const struct afs_vlserver_list *vllist = priv->vllist;
	288	const struct afs_vlserver_entry *entry;
	289	const struct afs_vlserver *vlserver;
	290	const struct afs_addr_list *alist;
	291	int i;
1da177e4	292
0a5143f2 DH	293	if (v == SEQ_START_TOKEN) {
0a5143f2 DH	294	seq_printf(m, "# source %s, status %s\n",
ca1cbbdc DH	295	dns_record_sources[vllist ? vllist->source : 0],
ca1cbbdc DH	296	dns_lookup_statuses[vllist ? vllist->status : 0]);
1da177e4 LT	297	return 0;
	298	}
	299
0a5143f2 DH	300	entry = v;
	301	vlserver = entry->server;
	302	alist = rcu_dereference(vlserver->addresses);
	303
	304	seq_printf(m, "%s [p=%hu w=%hu s=%s,%s]:\n",
	305	vlserver->name, entry->priority, entry->weight,
	306	dns_record_sources[alist ? alist->source : entry->source],
	307	dns_lookup_statuses[alist ? alist->status : entry->status]);
	308	if (alist) {
	309	for (i = 0; i < alist->nr_addrs; i++)
	310	seq_printf(m, " %c %pISpc\n",
3bf0fb6f	311	alist->preferred == i ? '>' : '-',
0a5143f2 DH	312	&alist->addrs[i].transport);
0a5143f2 DH	313	}
1da177e4	314	return 0;
ec26815a	315	}
1da177e4	316
1da177e4	317	static void afs_proc_cell_vlservers_start(struct seq_file m, loff_t *_pos)
fe342cf7	318	__acquires(rcu)
1da177e4	319	{
0a5143f2 DH	320	struct afs_vl_seq_net_private *priv = m->private;
0a5143f2 DH	321	struct afs_vlserver_list *vllist;
353861cf	322	struct afs_cell *cell = PDE_DATA(file_inode(m->file));
1da177e4 LT	323	loff_t pos = *_pos;
1da177e4 LT	324
8b2a464c	325	rcu_read_lock();
1da177e4	326
0a5143f2 DH	327	vllist = rcu_dereference(cell->vl_servers);
0a5143f2 DH	328	priv->vllist = vllist;
1da177e4	329
0a5143f2 DH	330	if (pos < 0)
	331	*_pos = pos = 0;
	332	if (pos == 0)
	333	return SEQ_START_TOKEN;
1da177e4	334
ca1cbbdc	335	if (pos - 1 >= vllist->nr_servers)
1da177e4 LT	336	return NULL;
1da177e4 LT	337
0a5143f2	338	return &vllist->servers[pos - 1];
ec26815a	339	}
1da177e4	340
5b86d4ff	341	static void afs_proc_cell_vlservers_next(struct seq_file m, void *v,
1da177e4 LT	342	loff_t *_pos)
1da177e4 LT	343	{
0a5143f2 DH	344	struct afs_vl_seq_net_private *priv = m->private;
0a5143f2 DH	345	struct afs_vlserver_list *vllist = priv->vllist;
1da177e4 LT	346	loff_t pos;
1da177e4 LT	347
1da177e4	348	pos = *_pos;
0a5143f2 DH	349	pos++;
	350	*_pos = pos;
	351	if (!vllist \|\| pos - 1 >= vllist->nr_servers)
1da177e4 LT	352	return NULL;
1da177e4 LT	353
0a5143f2	354	return &vllist->servers[pos - 1];
ec26815a	355	}
1da177e4	356
5b86d4ff	357	static void afs_proc_cell_vlservers_stop(struct seq_file m, void v)
fe342cf7	358	__releases(rcu)
1da177e4	359	{
8b2a464c	360	rcu_read_unlock();
ec26815a	361	}
1da177e4	362
5d9de25d DH	363	static const struct seq_operations afs_proc_cell_vlservers_ops = {
	364	.start = afs_proc_cell_vlservers_start,
	365	.next = afs_proc_cell_vlservers_next,
	366	.stop = afs_proc_cell_vlservers_stop,
	367	.show = afs_proc_cell_vlservers_show,
	368	};
	369
1da177e4	370	/*
5d9de25d	371	* Display the list of fileservers we're using within a namespace.
1da177e4	372	*/
f0691689	373	static int afs_proc_servers_show(struct seq_file m, void v)
1da177e4	374	{
f0691689 DH	375	struct afs_server *server;
f0691689 DH	376	struct afs_addr_list *alist;
0aac4bce	377	int i;
1da177e4	378
f0691689 DH	379	if (v == SEQ_START_TOKEN) {
f0691689 DH	380	seq_puts(m, "UUID USE ADDR\n");
1da177e4 LT	381	return 0;
	382	}
	383
f0691689 DH	384	server = list_entry(v, struct afs_server, proc_link);
f0691689 DH	385	alist = rcu_dereference(server->addresses);
0aac4bce	386	seq_printf(m, "%pU %3d %pISpc%s\n",
f0691689 DH	387	&server->uuid,
f0691689 DH	388	atomic_read(&server->usage),
0aac4bce	389	&alist->addrs[0].transport,
3bf0fb6f	390	alist->preferred == 0 ? "*" : "");
0aac4bce DH	391	for (i = 1; i < alist->nr_addrs; i++)
	392	seq_printf(m, " %pISpc%s\n",
	393	&alist->addrs[i].transport,
3bf0fb6f	394	alist->preferred == i ? "*" : "");
1da177e4	395	return 0;
ec26815a	396	}
1da177e4	397
d2ddc776	398	static void afs_proc_servers_start(struct seq_file m, loff_t *_pos)
fe342cf7	399	__acquires(rcu)
1da177e4	400	{
d2ddc776	401	rcu_read_lock();
5d9de25d	402	return seq_hlist_start_head_rcu(&afs_seq2net(m)->fs_proc, *_pos);
ec26815a	403	}
1da177e4	404
d2ddc776	405	static void afs_proc_servers_next(struct seq_file m, void v, loff_t _pos)
1da177e4	406	{
5d9de25d	407	return seq_hlist_next_rcu(v, &afs_seq2net(m)->fs_proc, _pos);
ec26815a	408	}
1da177e4	409
5b86d4ff	410	static void afs_proc_servers_stop(struct seq_file m, void v)
fe342cf7	411	__releases(rcu)
1da177e4	412	{
d2ddc776	413	rcu_read_unlock();
ec26815a	414	}
1da177e4	415
5d9de25d DH	416	static const struct seq_operations afs_proc_servers_ops = {
	417	.start = afs_proc_servers_start,
	418	.next = afs_proc_servers_next,
	419	.stop = afs_proc_servers_stop,
	420	.show = afs_proc_servers_show,
	421	};
6f8880d8	422
6f8880d8	423	/*
5d9de25d DH	424	* Display the list of strings that may be substituted for the @sys pathname
5d9de25d DH	425	* macro.
6f8880d8	426	*/
5d9de25d	427	static int afs_proc_sysname_show(struct seq_file m, void v)
6f8880d8	428	{
5d9de25d DH	429	struct afs_net *net = afs_seq2net(m);
	430	struct afs_sysnames *sysnames = net->sysnames;
	431	unsigned int i = (unsigned long)v - 1;
6f8880d8	432
5d9de25d DH	433	if (i < sysnames->nr)
	434	seq_printf(m, "%s\n", sysnames->subs[i]);
	435	return 0;
	436	}
6f8880d8	437
5d9de25d DH	438	static void afs_proc_sysname_start(struct seq_file m, loff_t *pos)
	439	__acquires(&net->sysnames_lock)
	440	{
	441	struct afs_net *net = afs_seq2net(m);
5b86d4ff	442	struct afs_sysnames *names;
6f8880d8	443
5d9de25d	444	read_lock(&net->sysnames_lock);
6f8880d8	445
5b86d4ff	446	names = net->sysnames;
5d9de25d DH	447	if (*pos >= names->nr)
	448	return NULL;
	449	return (void )(unsigned long)(pos + 1);
	450	}
	451
	452	static void afs_proc_sysname_next(struct seq_file m, void v, loff_t pos)
	453	{
	454	struct afs_net *net = afs_seq2net(m);
	455	struct afs_sysnames *names = net->sysnames;
	456
	457	*pos += 1;
	458	if (*pos >= names->nr)
	459	return NULL;
	460	return (void )(unsigned long)(pos + 1);
	461	}
	462
	463	static void afs_proc_sysname_stop(struct seq_file m, void v)
	464	__releases(&net->sysnames_lock)
	465	{
	466	struct afs_net *net = afs_seq2net(m);
	467
	468	read_unlock(&net->sysnames_lock);
6f8880d8 DH	469	}
6f8880d8 DH	470
5d9de25d DH	471	static const struct seq_operations afs_proc_sysname_ops = {
	472	.start = afs_proc_sysname_start,
	473	.next = afs_proc_sysname_next,
	474	.stop = afs_proc_sysname_stop,
	475	.show = afs_proc_sysname_show,
	476	};
	477
6f8880d8	478	/*
5d9de25d	479	* Allow the @sys substitution to be configured.
6f8880d8	480	*/
5b86d4ff	481	static int afs_proc_sysname_write(struct file file, char buf, size_t size)
6f8880d8	482	{
5b86d4ff	483	struct afs_sysnames sysnames, kill;
6f8880d8	484	struct seq_file *m = file->private_data;
5b86d4ff DH	485	struct afs_net *net = afs_seq2net(m);
5b86d4ff DH	486	char s, p, *sub;
6f8880d8 DH	487	int ret, len;
6f8880d8 DH	488
5b86d4ff	489	sysnames = kzalloc(sizeof(*sysnames), GFP_KERNEL);
6f8880d8	490	if (!sysnames)
5b86d4ff DH	491	return -ENOMEM;
	492	refcount_set(&sysnames->usage, 1);
	493	kill = sysnames;
6f8880d8	494
5b86d4ff	495	p = buf;
6f8880d8 DH	496	while ((s = strsep(&p, " \t\n"))) {
	497	len = strlen(s);
	498	if (len == 0)
	499	continue;
	500	ret = -ENAMETOOLONG;
	501	if (len >= AFSNAMEMAX)
	502	goto error;
	503
	504	if (len >= 4 &&
	505	s[len - 4] == '@' &&
	506	s[len - 3] == 's' &&
	507	s[len - 2] == 'y' &&
	508	s[len - 1] == 's')
	509	/* Protect against recursion */
	510	goto invalid;
	511
	512	if (s[0] == '.' &&
	513	(len < 2 \|\| (len == 2 && s[1] == '.')))
	514	goto invalid;
	515
	516	if (memchr(s, '/', len))
	517	goto invalid;
	518
	519	ret = -EFBIG;
	520	if (sysnames->nr >= AFS_NR_SYSNAME)
	521	goto out;
	522
	523	if (strcmp(s, afs_init_sysname) == 0) {
	524	sub = (char *)afs_init_sysname;
	525	} else {
	526	ret = -ENOMEM;
	527	sub = kmemdup(s, len + 1, GFP_KERNEL);
	528	if (!sub)
	529	goto out;
	530	}
	531
	532	sysnames->subs[sysnames->nr] = sub;
	533	sysnames->nr++;
	534	}
	535
5b86d4ff DH	536	if (sysnames->nr == 0) {
	537	sysnames->subs[0] = sysnames->blank;
	538	sysnames->nr++;
	539	}
	540
	541	write_lock(&net->sysnames_lock);
	542	kill = net->sysnames;
	543	net->sysnames = sysnames;
	544	write_unlock(&net->sysnames_lock);
	545	ret = 0;
6f8880d8	546	out:
5b86d4ff	547	afs_put_sysnames(kill);
6f8880d8 DH	548	return ret;
	549
	550	invalid:
	551	ret = -EINVAL;
	552	error:
6f8880d8 DH	553	goto out;
	554	}
	555
5d9de25d DH	556	void afs_put_sysnames(struct afs_sysnames *sysnames)
	557	{
	558	int i;
	559
	560	if (sysnames && refcount_dec_and_test(&sysnames->usage)) {
	561	for (i = 0; i < sysnames->nr; i++)
	562	if (sysnames->subs[i] != afs_init_sysname &&
	563	sysnames->subs[i] != sysnames->blank)
	564	kfree(sysnames->subs[i]);
	565	}
	566	}
	567
d55b4da4 DH	568	/*
	569	* Display general per-net namespace statistics
	570	*/
	571	static int afs_proc_stats_show(struct seq_file m, void v)
	572	{
5b86d4ff	573	struct afs_net *net = afs_seq2net_single(m);
d55b4da4 DH	574
	575	seq_puts(m, "kAFS statistics\n");
	576
f3ddee8d	577	seq_printf(m, "dir-mgmt: look=%u reval=%u inval=%u relpg=%u\n",
d55b4da4 DH	578	atomic_read(&net->n_lookup),
d55b4da4 DH	579	atomic_read(&net->n_reval),
f3ddee8d DH	580	atomic_read(&net->n_inval),
f3ddee8d DH	581	atomic_read(&net->n_relpg));
d55b4da4 DH	582
	583	seq_printf(m, "dir-data: rdpg=%u\n",
	584	atomic_read(&net->n_read_dir));
63a4681f DH	585
	586	seq_printf(m, "dir-edit: cr=%u rm=%u\n",
	587	atomic_read(&net->n_dir_cr),
	588	atomic_read(&net->n_dir_rm));
76a5cb6f DH	589
	590	seq_printf(m, "file-rd : n=%u nb=%lu\n",
	591	atomic_read(&net->n_fetches),
	592	atomic_long_read(&net->n_fetch_bytes));
	593	seq_printf(m, "file-wr : n=%u nb=%lu\n",
	594	atomic_read(&net->n_stores),
	595	atomic_long_read(&net->n_store_bytes));
d55b4da4 DH	596	return 0;
d55b4da4 DH	597	}
10495a00 DH	598
	599	/*
	600	* initialise /proc/fs/afs/<cell>/
	601	*/
5b86d4ff	602	int afs_proc_cell_setup(struct afs_cell *cell)
10495a00 DH	603	{
10495a00 DH	604	struct proc_dir_entry *dir;
5b86d4ff	605	struct afs_net *net = cell->net;
10495a00 DH	606
	607	_enter("%p{%s},%p", cell, cell->name, net->proc_afs);
	608
5b86d4ff	609	dir = proc_net_mkdir(net->net, cell->name, net->proc_afs);
10495a00 DH	610	if (!dir)
	611	goto error_dir;
	612
5b86d4ff DH	613	if (!proc_create_net_data("vlservers", 0444, dir,
5b86d4ff DH	614	&afs_proc_cell_vlservers_ops,
0a5143f2	615	sizeof(struct afs_vl_seq_net_private),
5b86d4ff DH	616	cell) \|\|
	617	!proc_create_net_data("volumes", 0444, dir,
	618	&afs_proc_cell_volumes_ops,
	619	sizeof(struct seq_net_private),
	620	cell))
10495a00 DH	621	goto error_tree;
	622
	623	_leave(" = 0");
	624	return 0;
	625
	626	error_tree:
	627	remove_proc_subtree(cell->name, net->proc_afs);
	628	error_dir:
	629	_leave(" = -ENOMEM");
	630	return -ENOMEM;
	631	}
	632
	633	/*
	634	* remove /proc/fs/afs/<cell>/
	635	*/
5b86d4ff	636	void afs_proc_cell_remove(struct afs_cell *cell)
10495a00	637	{
5b86d4ff	638	struct afs_net *net = cell->net;
10495a00	639
5b86d4ff	640	_enter("");
10495a00	641	remove_proc_subtree(cell->name, net->proc_afs);
10495a00 DH	642	_leave("");
	643	}
	644
	645	/*
	646	* initialise the /proc/fs/afs/ directory
	647	*/
	648	int afs_proc_init(struct afs_net *net)
	649	{
5b86d4ff DH	650	struct proc_dir_entry *p;
5b86d4ff DH	651
10495a00 DH	652	_enter("");
10495a00 DH	653
5b86d4ff DH	654	p = proc_net_mkdir(net->net, "afs", net->net->proc_net);
5b86d4ff DH	655	if (!p)
10495a00 DH	656	goto error_dir;
10495a00 DH	657
5b86d4ff DH	658	if (!proc_create_net_data_write("cells", 0644, p,
	659	&afs_proc_cells_ops,
	660	afs_proc_cells_write,
	661	sizeof(struct seq_net_private),
	662	NULL) \|\|
	663	!proc_create_net_single_write("rootcell", 0644, p,
	664	afs_proc_rootcell_show,
	665	afs_proc_rootcell_write,
	666	NULL) \|\|
	667	!proc_create_net("servers", 0444, p, &afs_proc_servers_ops,
	668	sizeof(struct seq_net_private)) \|\|
	669	!proc_create_net_single("stats", 0444, p, afs_proc_stats_show, NULL) \|\|
	670	!proc_create_net_data_write("sysname", 0644, p,
	671	&afs_proc_sysname_ops,
	672	afs_proc_sysname_write,
	673	sizeof(struct seq_net_private),
	674	NULL))
10495a00 DH	675	goto error_tree;
10495a00 DH	676
5b86d4ff	677	net->proc_afs = p;
10495a00 DH	678	_leave(" = 0");
	679	return 0;
	680
	681	error_tree:
5b86d4ff	682	proc_remove(p);
10495a00 DH	683	error_dir:
	684	_leave(" = -ENOMEM");
	685	return -ENOMEM;
	686	}
	687
	688	/*
	689	* clean up the /proc/fs/afs/ directory
	690	*/
	691	void afs_proc_cleanup(struct afs_net *net)
	692	{
	693	proc_remove(net->proc_afs);
	694	net->proc_afs = NULL;
	695	}