[people/ms/linux.git] / fs / autofs / inode.c

/*
 * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved
 * Copyright 2005-2006 Ian Kent <raven@themaw.net>
 *
 * This file is part of the Linux kernel and is made available under
 * the terms of the GNU General Public License, version 2, or at your
 * option, any later version, incorporated herein by reference.
 */

#include <linux/seq_file.h>
#include <linux/pagemap.h>
#include <linux/parser.h>

#include "autofs_i.h"

struct autofs_info *autofs_new_ino(struct autofs_sb_info *sbi)
{
	struct autofs_info *ino;

	ino = kzalloc(sizeof(*ino), GFP_KERNEL);
	if (ino) {
		INIT_LIST_HEAD(&ino->active);
		INIT_LIST_HEAD(&ino->expiring);
		ino->last_used = jiffies;
		ino->sbi = sbi;
	}
	return ino;
}

void autofs_clean_ino(struct autofs_info *ino)
{
	ino->uid = GLOBAL_ROOT_UID;
	ino->gid = GLOBAL_ROOT_GID;
	ino->last_used = jiffies;
}

void autofs_free_ino(struct autofs_info *ino)
{
	kfree(ino);
}

void autofs_kill_sb(struct super_block *sb)
{
	struct autofs_sb_info *sbi = autofs_sbi(sb);

	/*
	 * In the event of a failure in get_sb_nodev the superblock
	 * info is not present so nothing else has been setup, so
	 * just call kill_anon_super when we are called from
	 * deactivate_super.
	 */
	if (sbi) {
		/* Free wait queues, close pipe */
		autofs_catatonic_mode(sbi);
		put_pid(sbi->oz_pgrp);
	}

	pr_debug("shutting down\n");
	kill_litter_super(sb);
	if (sbi)
		kfree_rcu(sbi, rcu);
}

static int autofs_show_options(struct seq_file *m, struct dentry *root)
{
	struct autofs_sb_info *sbi = autofs_sbi(root->d_sb);
	struct inode *root_inode = d_inode(root->d_sb->s_root);

	if (!sbi)
		return 0;

	seq_printf(m, ",fd=%d", sbi->pipefd);
	if (!uid_eq(root_inode->i_uid, GLOBAL_ROOT_UID))
		seq_printf(m, ",uid=%u",
			from_kuid_munged(&init_user_ns, root_inode->i_uid));
	if (!gid_eq(root_inode->i_gid, GLOBAL_ROOT_GID))
		seq_printf(m, ",gid=%u",
			from_kgid_munged(&init_user_ns, root_inode->i_gid));
	seq_printf(m, ",pgrp=%d", pid_vnr(sbi->oz_pgrp));
	seq_printf(m, ",timeout=%lu", sbi->exp_timeout/HZ);
	seq_printf(m, ",minproto=%d", sbi->min_proto);
	seq_printf(m, ",maxproto=%d", sbi->max_proto);

	if (autofs_type_offset(sbi->type))
		seq_printf(m, ",offset");
	else if (autofs_type_direct(sbi->type))
		seq_printf(m, ",direct");
	else
		seq_printf(m, ",indirect");
#ifdef CONFIG_CHECKPOINT_RESTORE
	if (sbi->pipe)
		seq_printf(m, ",pipe_ino=%ld", file_inode(sbi->pipe)->i_ino);
	else
		seq_printf(m, ",pipe_ino=-1");
#endif
	return 0;
}

static void autofs_evict_inode(struct inode *inode)
{
	clear_inode(inode);
	kfree(inode->i_private);
}

static const struct super_operations autofs_sops = {
	.statfs		= simple_statfs,
	.show_options	= autofs_show_options,
	.evict_inode	= autofs_evict_inode,
};

enum {Opt_err, Opt_fd, Opt_uid, Opt_gid, Opt_pgrp, Opt_minproto, Opt_maxproto,
	Opt_indirect, Opt_direct, Opt_offset};

static const match_table_t tokens = {
	{Opt_fd, "fd=%u"},
	{Opt_uid, "uid=%u"},
	{Opt_gid, "gid=%u"},
	{Opt_pgrp, "pgrp=%u"},
	{Opt_minproto, "minproto=%u"},
	{Opt_maxproto, "maxproto=%u"},
	{Opt_indirect, "indirect"},
	{Opt_direct, "direct"},
	{Opt_offset, "offset"},
	{Opt_err, NULL}
};

static int parse_options(char *options,
			 struct inode *root, int *pgrp, bool *pgrp_set,
			 struct autofs_sb_info *sbi)
{
	char *p;
	substring_t args[MAX_OPT_ARGS];
	int option;
	int pipefd = -1;
	kuid_t uid;
	kgid_t gid;

	root->i_uid = current_uid();
	root->i_gid = current_gid();

	sbi->min_proto = AUTOFS_MIN_PROTO_VERSION;
	sbi->max_proto = AUTOFS_MAX_PROTO_VERSION;

	sbi->pipefd = -1;

	if (!options)
		return 1;

	while ((p = strsep(&options, ",")) != NULL) {
		int token;

		if (!*p)
			continue;

		token = match_token(p, tokens, args);
		switch (token) {
		case Opt_fd:
			if (match_int(args, &pipefd))
				return 1;
			sbi->pipefd = pipefd;
			break;
		case Opt_uid:
			if (match_int(args, &option))
				return 1;
			uid = make_kuid(current_user_ns(), option);
			if (!uid_valid(uid))
				return 1;
			root->i_uid = uid;
			break;
		case Opt_gid:
			if (match_int(args, &option))
				return 1;
			gid = make_kgid(current_user_ns(), option);
			if (!gid_valid(gid))
				return 1;
			root->i_gid = gid;
			break;
		case Opt_pgrp:
			if (match_int(args, &option))
				return 1;
			*pgrp = option;
			*pgrp_set = true;
			break;
		case Opt_minproto:
			if (match_int(args, &option))
				return 1;
			sbi->min_proto = option;
			break;
		case Opt_maxproto:
			if (match_int(args, &option))
				return 1;
			sbi->max_proto = option;
			break;
		case Opt_indirect:
			set_autofs_type_indirect(&sbi->type);
			break;
		case Opt_direct:
			set_autofs_type_direct(&sbi->type);
			break;
		case Opt_offset:
			set_autofs_type_offset(&sbi->type);
			break;
		default:
			return 1;
		}
	}
	return (sbi->pipefd < 0);
}

int autofs_fill_super(struct super_block *s, void *data, int silent)
{
	struct inode *root_inode;
	struct dentry *root;
	struct file *pipe;
	struct autofs_sb_info *sbi;
	struct autofs_info *ino;
	int pgrp = 0;
	bool pgrp_set = false;
	int ret = -EINVAL;

	sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
	if (!sbi)
		return -ENOMEM;
	pr_debug("starting up, sbi = %p\n", sbi);

	s->s_fs_info = sbi;
	sbi->magic = AUTOFS_SBI_MAGIC;
	sbi->pipefd = -1;
	sbi->pipe = NULL;
	sbi->catatonic = 1;
	sbi->exp_timeout = 0;
	sbi->oz_pgrp = NULL;
	sbi->sb = s;
	sbi->version = 0;
	sbi->sub_version = 0;
	set_autofs_type_indirect(&sbi->type);
	sbi->min_proto = 0;
	sbi->max_proto = 0;
	mutex_init(&sbi->wq_mutex);
	mutex_init(&sbi->pipe_mutex);
	spin_lock_init(&sbi->fs_lock);
	sbi->queues = NULL;
	spin_lock_init(&sbi->lookup_lock);
	INIT_LIST_HEAD(&sbi->active_list);
	INIT_LIST_HEAD(&sbi->expiring_list);
	s->s_blocksize = 1024;
	s->s_blocksize_bits = 10;
	s->s_magic = AUTOFS_SUPER_MAGIC;
	s->s_op = &autofs_sops;
	s->s_d_op = &autofs_dentry_operations;
	s->s_time_gran = 1;

	/*
	 * Get the root inode and dentry, but defer checking for errors.
	 */
	ino = autofs_new_ino(sbi);
	if (!ino) {
		ret = -ENOMEM;
		goto fail_free;
	}
	root_inode = autofs_get_inode(s, S_IFDIR | 0755);
	root = d_make_root(root_inode);
	if (!root)
		goto fail_ino;
	pipe = NULL;

	root->d_fsdata = ino;

	/* Can this call block? */
	if (parse_options(data, root_inode, &pgrp, &pgrp_set, sbi)) {
		pr_err("called with bogus options\n");
		goto fail_dput;
	}

	/* Test versions first */
	if (sbi->max_proto < AUTOFS_MIN_PROTO_VERSION ||
	    sbi->min_proto > AUTOFS_MAX_PROTO_VERSION) {
		pr_err("kernel does not match daemon version "
		       "daemon (%d, %d) kernel (%d, %d)\n",
		       sbi->min_proto, sbi->max_proto,
		       AUTOFS_MIN_PROTO_VERSION, AUTOFS_MAX_PROTO_VERSION);
		goto fail_dput;
	}

	/* Establish highest kernel protocol version */
	if (sbi->max_proto > AUTOFS_MAX_PROTO_VERSION)
		sbi->version = AUTOFS_MAX_PROTO_VERSION;
	else
		sbi->version = sbi->max_proto;
	sbi->sub_version = AUTOFS_PROTO_SUBVERSION;

	if (pgrp_set) {
		sbi->oz_pgrp = find_get_pid(pgrp);
		if (!sbi->oz_pgrp) {
			pr_err("could not find process group %d\n",
				pgrp);
			goto fail_dput;
		}
	} else {
		sbi->oz_pgrp = get_task_pid(current, PIDTYPE_PGID);
	}

	if (autofs_type_trigger(sbi->type))
		__managed_dentry_set_managed(root);

	root_inode->i_fop = &autofs_root_operations;
	root_inode->i_op = &autofs_dir_inode_operations;

	pr_debug("pipe fd = %d, pgrp = %u\n",
		 sbi->pipefd, pid_nr(sbi->oz_pgrp));
	pipe = fget(sbi->pipefd);

	if (!pipe) {
		pr_err("could not open pipe file descriptor\n");
		goto fail_put_pid;
	}
	ret = autofs_prepare_pipe(pipe);
	if (ret < 0)
		goto fail_fput;
	sbi->pipe = pipe;
	sbi->catatonic = 0;

	/*
	 * Success! Install the root dentry now to indicate completion.
	 */
	s->s_root = root;
	return 0;

	/*
	 * Failure ... clean up.
	 */
fail_fput:
	pr_err("pipe file descriptor does not contain proper ops\n");
	fput(pipe);
fail_put_pid:
	put_pid(sbi->oz_pgrp);
fail_dput:
	dput(root);
	goto fail_free;
fail_ino:
	autofs_free_ino(ino);
fail_free:
	kfree(sbi);
	s->s_fs_info = NULL;
	return ret;
}

struct inode *autofs_get_inode(struct super_block *sb, umode_t mode)
{
	struct inode *inode = new_inode(sb);

	if (inode == NULL)
		return NULL;

	inode->i_mode = mode;
	if (sb->s_root) {
		inode->i_uid = d_inode(sb->s_root)->i_uid;
		inode->i_gid = d_inode(sb->s_root)->i_gid;
	}
	inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
	inode->i_ino = get_next_ino();

	if (S_ISDIR(mode)) {
		set_nlink(inode, 2);
		inode->i_op = &autofs_dir_inode_operations;
		inode->i_fop = &autofs_dir_operations;
	} else if (S_ISLNK(mode)) {
		inode->i_op = &autofs_symlink_inode_operations;
	} else
		WARN_ON(1);

	return inode;
}
Commit	Line	Data
ebc921ca IK	1	/*
	2	* Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved
	3	* Copyright 2005-2006 Ian Kent <raven@themaw.net>
	4	*
	5	* This file is part of the Linux kernel and is made available under
	6	* the terms of the GNU General Public License, version 2, or at your
	7	* option, any later version, incorporated herein by reference.
	8	*/
	9
ebc921ca IK	10	#include <linux/seq_file.h>
	11	#include <linux/pagemap.h>
	12	#include <linux/parser.h>
6471e938	13
ebc921ca	14	#include "autofs_i.h"
ebc921ca IK	15
	16	struct autofs_info autofs_new_ino(struct autofs_sb_info sbi)
	17	{
	18	struct autofs_info *ino;
	19
	20	ino = kzalloc(sizeof(*ino), GFP_KERNEL);
	21	if (ino) {
	22	INIT_LIST_HEAD(&ino->active);
	23	INIT_LIST_HEAD(&ino->expiring);
	24	ino->last_used = jiffies;
	25	ino->sbi = sbi;
	26	}
	27	return ino;
	28	}
	29
	30	void autofs_clean_ino(struct autofs_info *ino)
	31	{
	32	ino->uid = GLOBAL_ROOT_UID;
	33	ino->gid = GLOBAL_ROOT_GID;
	34	ino->last_used = jiffies;
	35	}
	36
	37	void autofs_free_ino(struct autofs_info *ino)
	38	{
	39	kfree(ino);
	40	}
	41
	42	void autofs_kill_sb(struct super_block *sb)
	43	{
	44	struct autofs_sb_info *sbi = autofs_sbi(sb);
	45
	46	/*
	47	* In the event of a failure in get_sb_nodev the superblock
	48	* info is not present so nothing else has been setup, so
	49	* just call kill_anon_super when we are called from
	50	* deactivate_super.
	51	*/
	52	if (sbi) {
	53	/* Free wait queues, close pipe */
	54	autofs_catatonic_mode(sbi);
	55	put_pid(sbi->oz_pgrp);
	56	}
	57
	58	pr_debug("shutting down\n");
	59	kill_litter_super(sb);
	60	if (sbi)
	61	kfree_rcu(sbi, rcu);
	62	}
	63
	64	static int autofs_show_options(struct seq_file m, struct dentry root)
	65	{
	66	struct autofs_sb_info *sbi = autofs_sbi(root->d_sb);
	67	struct inode *root_inode = d_inode(root->d_sb->s_root);
	68
	69	if (!sbi)
	70	return 0;
	71
	72	seq_printf(m, ",fd=%d", sbi->pipefd);
	73	if (!uid_eq(root_inode->i_uid, GLOBAL_ROOT_UID))
	74	seq_printf(m, ",uid=%u",
	75	from_kuid_munged(&init_user_ns, root_inode->i_uid));
	76	if (!gid_eq(root_inode->i_gid, GLOBAL_ROOT_GID))
	77	seq_printf(m, ",gid=%u",
	78	from_kgid_munged(&init_user_ns, root_inode->i_gid));
79	seq_printf(m, ",pgrp=%d", pid_vnr(sbi->oz_pgrp));
80	seq_printf(m, ",timeout=%lu", sbi->exp_timeout/HZ);
81	seq_printf(m, ",minproto=%d", sbi->min_proto);
82	seq_printf(m, ",maxproto=%d", sbi->max_proto);
83
84	if (autofs_type_offset(sbi->type))
85	seq_printf(m, ",offset");
86	else if (autofs_type_direct(sbi->type))
87	seq_printf(m, ",direct");
88	else
89	seq_printf(m, ",indirect");
90	#ifdef CONFIG_CHECKPOINT_RESTORE
91	if (sbi->pipe)
92	seq_printf(m, ",pipe_ino=%ld", file_inode(sbi->pipe)->i_ino);
93	else
94	seq_printf(m, ",pipe_ino=-1");
95	#endif
96	return 0;
97	}
98
99	static void autofs_evict_inode(struct inode *inode)
100	{
101	clear_inode(inode);
102	kfree(inode->i_private);
103	}
104
105	static const struct super_operations autofs_sops = {
106	.statfs = simple_statfs,
107	.show_options = autofs_show_options,
108	.evict_inode = autofs_evict_inode,
109	};
110
111	enum {Opt_err, Opt_fd, Opt_uid, Opt_gid, Opt_pgrp, Opt_minproto, Opt_maxproto,
112	Opt_indirect, Opt_direct, Opt_offset};
113
114	static const match_table_t tokens = {
115	{Opt_fd, "fd=%u"},
116	{Opt_uid, "uid=%u"},
117	{Opt_gid, "gid=%u"},
118	{Opt_pgrp, "pgrp=%u"},
119	{Opt_minproto, "minproto=%u"},
120	{Opt_maxproto, "maxproto=%u"},
121	{Opt_indirect, "indirect"},
122	{Opt_direct, "direct"},
123	{Opt_offset, "offset"},
124	{Opt_err, NULL}
125	};
126
9bf964c9 IK	127	static int parse_options(char *options,
	128	struct inode root, int pgrp, bool *pgrp_set,
	129	struct autofs_sb_info *sbi)
ebc921ca IK	130	{
	131	char *p;
	132	substring_t args[MAX_OPT_ARGS];
	133	int option;
9bf964c9 IK	134	int pipefd = -1;
	135	kuid_t uid;
	136	kgid_t gid;
ebc921ca	137
9bf964c9 IK	138	root->i_uid = current_uid();
9bf964c9 IK	139	root->i_gid = current_gid();
ebc921ca	140
9bf964c9 IK	141	sbi->min_proto = AUTOFS_MIN_PROTO_VERSION;
9bf964c9 IK	142	sbi->max_proto = AUTOFS_MAX_PROTO_VERSION;
ebc921ca	143
9bf964c9	144	sbi->pipefd = -1;
ebc921ca IK	145
	146	if (!options)
	147	return 1;
	148
	149	while ((p = strsep(&options, ",")) != NULL) {
	150	int token;
	151
	152	if (!*p)
	153	continue;
	154
	155	token = match_token(p, tokens, args);
	156	switch (token) {
	157	case Opt_fd:
9bf964c9	158	if (match_int(args, &pipefd))
ebc921ca	159	return 1;
9bf964c9	160	sbi->pipefd = pipefd;
ebc921ca IK	161	break;
	162	case Opt_uid:
	163	if (match_int(args, &option))
	164	return 1;
9bf964c9 IK	165	uid = make_kuid(current_user_ns(), option);
9bf964c9 IK	166	if (!uid_valid(uid))
ebc921ca	167	return 1;
9bf964c9	168	root->i_uid = uid;
ebc921ca IK	169	break;
	170	case Opt_gid:
	171	if (match_int(args, &option))
	172	return 1;
9bf964c9 IK	173	gid = make_kgid(current_user_ns(), option);
9bf964c9 IK	174	if (!gid_valid(gid))
ebc921ca	175	return 1;
9bf964c9	176	root->i_gid = gid;
ebc921ca IK	177	break;
	178	case Opt_pgrp:
	179	if (match_int(args, &option))
	180	return 1;
	181	*pgrp = option;
	182	*pgrp_set = true;
	183	break;
	184	case Opt_minproto:
	185	if (match_int(args, &option))
	186	return 1;
9bf964c9	187	sbi->min_proto = option;
ebc921ca IK	188	break;
	189	case Opt_maxproto:
	190	if (match_int(args, &option))
	191	return 1;
9bf964c9	192	sbi->max_proto = option;
ebc921ca IK	193	break;
ebc921ca IK	194	case Opt_indirect:
9bf964c9	195	set_autofs_type_indirect(&sbi->type);
ebc921ca IK	196	break;
ebc921ca IK	197	case Opt_direct:
9bf964c9	198	set_autofs_type_direct(&sbi->type);
ebc921ca IK	199	break;
ebc921ca IK	200	case Opt_offset:
9bf964c9	201	set_autofs_type_offset(&sbi->type);
ebc921ca IK	202	break;
	203	default:
	204	return 1;
	205	}
	206	}
9bf964c9	207	return (sbi->pipefd < 0);
ebc921ca IK	208	}
	209
	210	int autofs_fill_super(struct super_block s, void data, int silent)
	211	{
	212	struct inode *root_inode;
	213	struct dentry *root;
	214	struct file *pipe;
ebc921ca IK	215	struct autofs_sb_info *sbi;
	216	struct autofs_info *ino;
	217	int pgrp = 0;
	218	bool pgrp_set = false;
	219	int ret = -EINVAL;
	220
	221	sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
	222	if (!sbi)
	223	return -ENOMEM;
	224	pr_debug("starting up, sbi = %p\n", sbi);
	225
	226	s->s_fs_info = sbi;
	227	sbi->magic = AUTOFS_SBI_MAGIC;
	228	sbi->pipefd = -1;
	229	sbi->pipe = NULL;
	230	sbi->catatonic = 1;
	231	sbi->exp_timeout = 0;
	232	sbi->oz_pgrp = NULL;
	233	sbi->sb = s;
	234	sbi->version = 0;
	235	sbi->sub_version = 0;
	236	set_autofs_type_indirect(&sbi->type);
	237	sbi->min_proto = 0;
	238	sbi->max_proto = 0;
	239	mutex_init(&sbi->wq_mutex);
	240	mutex_init(&sbi->pipe_mutex);
	241	spin_lock_init(&sbi->fs_lock);
	242	sbi->queues = NULL;
	243	spin_lock_init(&sbi->lookup_lock);
	244	INIT_LIST_HEAD(&sbi->active_list);
	245	INIT_LIST_HEAD(&sbi->expiring_list);
	246	s->s_blocksize = 1024;
	247	s->s_blocksize_bits = 10;
	248	s->s_magic = AUTOFS_SUPER_MAGIC;
	249	s->s_op = &autofs_sops;
	250	s->s_d_op = &autofs_dentry_operations;
	251	s->s_time_gran = 1;
	252
	253	/*
	254	* Get the root inode and dentry, but defer checking for errors.
	255	*/
	256	ino = autofs_new_ino(sbi);
	257	if (!ino) {
	258	ret = -ENOMEM;
	259	goto fail_free;
	260	}
	261	root_inode = autofs_get_inode(s, S_IFDIR \| 0755);
	262	root = d_make_root(root_inode);
	263	if (!root)
	264	goto fail_ino;
	265	pipe = NULL;
	266
	267	root->d_fsdata = ino;
	268
	269	/* Can this call block? */
9bf964c9	270	if (parse_options(data, root_inode, &pgrp, &pgrp_set, sbi)) {
ebc921ca IK	271	pr_err("called with bogus options\n");
	272	goto fail_dput;
	273	}
	274
	275	/* Test versions first */
	276	if (sbi->max_proto < AUTOFS_MIN_PROTO_VERSION \|\|
	277	sbi->min_proto > AUTOFS_MAX_PROTO_VERSION) {
	278	pr_err("kernel does not match daemon version "
	279	"daemon (%d, %d) kernel (%d, %d)\n",
	280	sbi->min_proto, sbi->max_proto,
	281	AUTOFS_MIN_PROTO_VERSION, AUTOFS_MAX_PROTO_VERSION);
	282	goto fail_dput;
	283	}
	284
	285	/* Establish highest kernel protocol version */
	286	if (sbi->max_proto > AUTOFS_MAX_PROTO_VERSION)
	287	sbi->version = AUTOFS_MAX_PROTO_VERSION;
	288	else
	289	sbi->version = sbi->max_proto;
	290	sbi->sub_version = AUTOFS_PROTO_SUBVERSION;
	291
	292	if (pgrp_set) {
	293	sbi->oz_pgrp = find_get_pid(pgrp);
	294	if (!sbi->oz_pgrp) {
	295	pr_err("could not find process group %d\n",
	296	pgrp);
	297	goto fail_dput;
	298	}
	299	} else {
	300	sbi->oz_pgrp = get_task_pid(current, PIDTYPE_PGID);
	301	}
	302
	303	if (autofs_type_trigger(sbi->type))
	304	__managed_dentry_set_managed(root);
	305
	306	root_inode->i_fop = &autofs_root_operations;
	307	root_inode->i_op = &autofs_dir_inode_operations;
	308
9bf964c9 IK	309	pr_debug("pipe fd = %d, pgrp = %u\n",
	310	sbi->pipefd, pid_nr(sbi->oz_pgrp));
	311	pipe = fget(sbi->pipefd);
ebc921ca IK	312
	313	if (!pipe) {
	314	pr_err("could not open pipe file descriptor\n");
	315	goto fail_put_pid;
	316	}
	317	ret = autofs_prepare_pipe(pipe);
	318	if (ret < 0)
	319	goto fail_fput;
	320	sbi->pipe = pipe;
ebc921ca IK	321	sbi->catatonic = 0;
	322
	323	/*
	324	* Success! Install the root dentry now to indicate completion.
	325	*/
	326	s->s_root = root;
	327	return 0;
	328
	329	/*
	330	* Failure ... clean up.
	331	*/
	332	fail_fput:
	333	pr_err("pipe file descriptor does not contain proper ops\n");
	334	fput(pipe);
	335	fail_put_pid:
	336	put_pid(sbi->oz_pgrp);
	337	fail_dput:
	338	dput(root);
	339	goto fail_free;
	340	fail_ino:
	341	autofs_free_ino(ino);
	342	fail_free:
	343	kfree(sbi);
	344	s->s_fs_info = NULL;
	345	return ret;
	346	}
	347
	348	struct inode autofs_get_inode(struct super_block sb, umode_t mode)
	349	{
	350	struct inode *inode = new_inode(sb);
	351
	352	if (inode == NULL)
	353	return NULL;
	354
	355	inode->i_mode = mode;
	356	if (sb->s_root) {
	357	inode->i_uid = d_inode(sb->s_root)->i_uid;
	358	inode->i_gid = d_inode(sb->s_root)->i_gid;
	359	}
	360	inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
	361	inode->i_ino = get_next_ino();
	362
	363	if (S_ISDIR(mode)) {
	364	set_nlink(inode, 2);
	365	inode->i_op = &autofs_dir_inode_operations;
	366	inode->i_fop = &autofs_dir_operations;
	367	} else if (S_ISLNK(mode)) {
	368	inode->i_op = &autofs_symlink_inode_operations;
	369	} else
	370	WARN_ON(1);
	371
	372	return inode;
	373	}