[linux.git] / fs / autofs4 / inode.c

/* -*- c -*- --------------------------------------------------------------- *
 *
 * linux/fs/autofs/inode.c
 *
 *  Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved
 *  Copyright 2005-2006 Ian Kent <[email protected]>
 *
 * 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/kernel.h>
#include <linux/slab.h>
#include <linux/file.h>
#include <linux/seq_file.h>
#include <linux/pagemap.h>
#include <linux/parser.h>
#include <linux/bitops.h>
#include <linux/magic.h>
#include "autofs_i.h"
#include <linux/module.h>

struct autofs_info *autofs4_new_ino(struct autofs_sb_info *sbi)
{
	struct autofs_info *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 autofs4_clean_ino(struct autofs_info *ino)
{
	ino->uid = 0;
	ino->gid = 0;
	ino->last_used = jiffies;
}

void autofs4_free_ino(struct autofs_info *ino)
{
	kfree(ino);
}

void autofs4_kill_sb(struct super_block *sb)
{
	struct autofs_sb_info *sbi = autofs4_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)
		goto out_kill_sb;

	/* Free wait queues, close pipe */
	autofs4_catatonic_mode(sbi);

	sb->s_fs_info = NULL;
	kfree(sbi);

out_kill_sb:
	DPRINTK("shutting down");
	kill_litter_super(sb);
}

static int autofs4_show_options(struct seq_file *m, struct vfsmount *mnt)
{
	struct autofs_sb_info *sbi = autofs4_sbi(mnt->mnt_sb);
	struct inode *root_inode = mnt->mnt_sb->s_root->d_inode;

	if (!sbi)
		return 0;

	seq_printf(m, ",fd=%d", sbi->pipefd);
	if (root_inode->i_uid != 0)
		seq_printf(m, ",uid=%u", root_inode->i_uid);
	if (root_inode->i_gid != 0)
		seq_printf(m, ",gid=%u", root_inode->i_gid);
	seq_printf(m, ",pgrp=%d", 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");

	return 0;
}

static void autofs4_evict_inode(struct inode *inode)
{
	end_writeback(inode);
	kfree(inode->i_private);
}

static const struct super_operations autofs4_sops = {
	.statfs		= simple_statfs,
	.show_options	= autofs4_show_options,
	.evict_inode	= autofs4_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, int *pipefd, uid_t *uid, gid_t *gid,
		pid_t *pgrp, unsigned int *type, int *minproto, int *maxproto)
{
	char *p;
	substring_t args[MAX_OPT_ARGS];
	int option;

	*uid = current_uid();
	*gid = current_gid();
	*pgrp = task_pgrp_nr(current);

	*minproto = AUTOFS_MIN_PROTO_VERSION;
	*maxproto = AUTOFS_MAX_PROTO_VERSION;

	*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;
			break;
		case Opt_uid:
			if (match_int(args, &option))
				return 1;
			*uid = option;
			break;
		case Opt_gid:
			if (match_int(args, &option))
				return 1;
			*gid = option;
			break;
		case Opt_pgrp:
			if (match_int(args, &option))
				return 1;
			*pgrp = option;
			break;
		case Opt_minproto:
			if (match_int(args, &option))
				return 1;
			*minproto = option;
			break;
		case Opt_maxproto:
			if (match_int(args, &option))
				return 1;
			*maxproto = option;
			break;
		case Opt_indirect:
			set_autofs_type_indirect(type);
			break;
		case Opt_direct:
			set_autofs_type_direct(type);
			break;
		case Opt_offset:
			set_autofs_type_offset(type);
			break;
		default:
			return 1;
		}
	}
	return (*pipefd < 0);
}

int autofs4_fill_super(struct super_block *s, void *data, int silent)
{
	struct inode * root_inode;
	struct dentry * root;
	struct file * pipe;
	int pipefd;
	struct autofs_sb_info *sbi;
	struct autofs_info *ino;

	sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
	if (!sbi)
		goto fail_unlock;
	DPRINTK("starting up, sbi = %p",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 = task_pgrp_nr(current);
	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);
	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 = &autofs4_sops;
	s->s_d_op = &autofs4_dentry_operations;
	s->s_time_gran = 1;

	/*
	 * Get the root inode and dentry, but defer checking for errors.
	 */
	ino = autofs4_new_ino(sbi);
	if (!ino)
		goto fail_free;
	root_inode = autofs4_get_inode(s, S_IFDIR | 0755);
	if (!root_inode)
		goto fail_ino;

	root = d_alloc_root(root_inode);
	if (!root)
		goto fail_iput;
	pipe = NULL;

	root->d_fsdata = ino;

	/* Can this call block? */
	if (parse_options(data, &pipefd, &root_inode->i_uid, &root_inode->i_gid,
				&sbi->oz_pgrp, &sbi->type, &sbi->min_proto,
				&sbi->max_proto)) {
		printk("autofs: called with bogus options\n");
		goto fail_dput;
	}

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

	root_inode->i_fop = &autofs4_root_operations;
	root_inode->i_op = &autofs4_dir_inode_operations;

	/* Couldn't this be tested earlier? */
	if (sbi->max_proto < AUTOFS_MIN_PROTO_VERSION ||
	    sbi->min_proto > AUTOFS_MAX_PROTO_VERSION) {
		printk("autofs: 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;

	DPRINTK("pipe fd = %d, pgrp = %u", pipefd, sbi->oz_pgrp);
	pipe = fget(pipefd);
	
	if (!pipe) {
		printk("autofs: could not open pipe file descriptor\n");
		goto fail_dput;
	}
	if (!pipe->f_op || !pipe->f_op->write)
		goto fail_fput;
	sbi->pipe = pipe;
	sbi->pipefd = pipefd;
	sbi->catatonic = 0;

	/*
	 * Success! Install the root dentry now to indicate completion.
	 */
	s->s_root = root;
	return 0;
	
	/*
	 * Failure ... clean up.
	 */
fail_fput:
	printk("autofs: pipe file descriptor does not contain proper ops\n");
	fput(pipe);
	/* fall through */
fail_dput:
	dput(root);
	goto fail_free;
fail_iput:
	printk("autofs: get root dentry failed\n");
	iput(root_inode);
fail_ino:
	kfree(ino);
fail_free:
	kfree(sbi);
	s->s_fs_info = NULL;
fail_unlock:
	return -EINVAL;
}

struct inode *autofs4_get_inode(struct super_block *sb, mode_t mode)
{
	struct inode *inode = new_inode(sb);

	if (inode == NULL)
		return NULL;

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

	if (S_ISDIR(mode)) {
		inode->i_nlink = 2;
		inode->i_op = &autofs4_dir_inode_operations;
		inode->i_fop = &autofs4_dir_operations;
	} else if (S_ISLNK(mode)) {
		inode->i_op = &autofs4_symlink_inode_operations;
	}

	return inode;
}
Commit	Line	Data
1da177e4 LT	1	/* -- c -- --------------------------------------------------------------- *
	2	*
	3	* linux/fs/autofs/inode.c
	4	*
	5	* Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved
34ca959c	6	* Copyright 2005-2006 Ian Kent <[email protected]>
1da177e4 LT	7	*
	8	* This file is part of the Linux kernel and is made available under
	9	* the terms of the GNU General Public License, version 2, or at your
	10	* option, any later version, incorporated herein by reference.
	11	*
	12	* ------------------------------------------------------------------------- */
	13
	14	#include <linux/kernel.h>
	15	#include <linux/slab.h>
	16	#include <linux/file.h>
d7c4a5f1	17	#include <linux/seq_file.h>
1da177e4 LT	18	#include <linux/pagemap.h>
	19	#include <linux/parser.h>
	20	#include <linux/bitops.h>
e18fa700	21	#include <linux/magic.h>
1da177e4 LT	22	#include "autofs_i.h"
	23	#include <linux/module.h>
	24
26e6c910	25	struct autofs_info autofs4_new_ino(struct autofs_sb_info sbi)
1da177e4	26	{
26e6c910 AV	27	struct autofs_info ino = kzalloc(sizeof(ino), GFP_KERNEL);
26e6c910 AV	28	if (ino) {
25767378 IK	29	INIT_LIST_HEAD(&ino->active);
25767378 IK	30	INIT_LIST_HEAD(&ino->expiring);
26e6c910 AV	31	ino->last_used = jiffies;
26e6c910 AV	32	ino->sbi = sbi;
25767378	33	}
26e6c910 AV	34	return ino;
26e6c910 AV	35	}
f50b6f86	36
26e6c910 AV	37	void autofs4_clean_ino(struct autofs_info *ino)
26e6c910 AV	38	{
c0f54d3e IK	39	ino->uid = 0;
c0f54d3e IK	40	ino->gid = 0;
1da177e4	41	ino->last_used = jiffies;
1da177e4 LT	42	}
	43
	44	void autofs4_free_ino(struct autofs_info *ino)
	45	{
1da177e4 LT	46	kfree(ino);
	47	}
	48
6ce31523	49	void autofs4_kill_sb(struct super_block *sb)
1da177e4 LT	50	{
	51	struct autofs_sb_info *sbi = autofs4_sbi(sb);
	52
ba8df43c IK	53	/*
	54	* In the event of a failure in get_sb_nodev the superblock
	55	* info is not present so nothing else has been setup, so
c949d4eb JK	56	* just call kill_anon_super when we are called from
c949d4eb JK	57	* deactivate_super.
ba8df43c IK	58	*/
ba8df43c IK	59	if (!sbi)
c949d4eb	60	goto out_kill_sb;
ba8df43c	61
5a11d4d0 IK	62	/* Free wait queues, close pipe */
5a11d4d0 IK	63	autofs4_catatonic_mode(sbi);
1da177e4	64
f50b6f86	65	sb->s_fs_info = NULL;
1da177e4 LT	66	kfree(sbi);
1da177e4 LT	67
c949d4eb	68	out_kill_sb:
1da177e4	69	DPRINTK("shutting down");
5b7e934d	70	kill_litter_super(sb);
1da177e4 LT	71	}
1da177e4 LT	72
d7c4a5f1 IK	73	static int autofs4_show_options(struct seq_file m, struct vfsmount mnt)
	74	{
	75	struct autofs_sb_info *sbi = autofs4_sbi(mnt->mnt_sb);
aef97cb9	76	struct inode *root_inode = mnt->mnt_sb->s_root->d_inode;
d7c4a5f1 IK	77
	78	if (!sbi)
	79	return 0;
	80
	81	seq_printf(m, ",fd=%d", sbi->pipefd);
aef97cb9 MS	82	if (root_inode->i_uid != 0)
	83	seq_printf(m, ",uid=%u", root_inode->i_uid);
	84	if (root_inode->i_gid != 0)
	85	seq_printf(m, ",gid=%u", root_inode->i_gid);
d7c4a5f1 IK	86	seq_printf(m, ",pgrp=%d", sbi->oz_pgrp);
	87	seq_printf(m, ",timeout=%lu", sbi->exp_timeout/HZ);
	88	seq_printf(m, ",minproto=%d", sbi->min_proto);
	89	seq_printf(m, ",maxproto=%d", sbi->max_proto);
	90
a92daf6b	91	if (autofs_type_offset(sbi->type))
34ca959c	92	seq_printf(m, ",offset");
a92daf6b	93	else if (autofs_type_direct(sbi->type))
34ca959c IK	94	seq_printf(m, ",direct");
	95	else
	96	seq_printf(m, ",indirect");
	97
d7c4a5f1 IK	98	return 0;
	99	}
	100
292c5ee8 AV	101	static void autofs4_evict_inode(struct inode *inode)
	102	{
	103	end_writeback(inode);
	104	kfree(inode->i_private);
	105	}
	106
ee9b6d61	107	static const struct super_operations autofs4_sops = {
1da177e4	108	.statfs = simple_statfs,
d7c4a5f1	109	.show_options = autofs4_show_options,
292c5ee8	110	.evict_inode = autofs4_evict_inode,
1da177e4 LT	111	};
1da177e4 LT	112
34ca959c IK	113	enum {Opt_err, Opt_fd, Opt_uid, Opt_gid, Opt_pgrp, Opt_minproto, Opt_maxproto,
34ca959c IK	114	Opt_indirect, Opt_direct, Opt_offset};
1da177e4	115
a447c093	116	static const match_table_t tokens = {
1da177e4 LT	117	{Opt_fd, "fd=%u"},
	118	{Opt_uid, "uid=%u"},
	119	{Opt_gid, "gid=%u"},
	120	{Opt_pgrp, "pgrp=%u"},
	121	{Opt_minproto, "minproto=%u"},
	122	{Opt_maxproto, "maxproto=%u"},
34ca959c IK	123	{Opt_indirect, "indirect"},
	124	{Opt_direct, "direct"},
	125	{Opt_offset, "offset"},
1da177e4 LT	126	{Opt_err, NULL}
	127	};
	128
	129	static int parse_options(char options, int pipefd, uid_t uid, gid_t gid,
d78e53c8	130	pid_t pgrp, unsigned int type, int minproto, int maxproto)
1da177e4 LT	131	{
	132	char *p;
	133	substring_t args[MAX_OPT_ARGS];
	134	int option;
	135
0eb790e3 DH	136	*uid = current_uid();
0eb790e3 DH	137	*gid = current_gid();
a47afb0f	138	*pgrp = task_pgrp_nr(current);
1da177e4 LT	139
	140	*minproto = AUTOFS_MIN_PROTO_VERSION;
	141	*maxproto = AUTOFS_MAX_PROTO_VERSION;
	142
	143	*pipefd = -1;
	144
	145	if (!options)
	146	return 1;
	147
	148	while ((p = strsep(&options, ",")) != NULL) {
	149	int token;
	150	if (!*p)
	151	continue;
	152
	153	token = match_token(p, tokens, args);
	154	switch (token) {
	155	case Opt_fd:
	156	if (match_int(args, pipefd))
	157	return 1;
	158	break;
	159	case Opt_uid:
	160	if (match_int(args, &option))
	161	return 1;
	162	*uid = option;
	163	break;
	164	case Opt_gid:
	165	if (match_int(args, &option))
	166	return 1;
	167	*gid = option;
	168	break;
	169	case Opt_pgrp:
	170	if (match_int(args, &option))
	171	return 1;
	172	*pgrp = option;
	173	break;
	174	case Opt_minproto:
	175	if (match_int(args, &option))
	176	return 1;
	177	*minproto = option;
	178	break;
	179	case Opt_maxproto:
	180	if (match_int(args, &option))
	181	return 1;
	182	*maxproto = option;
	183	break;
34ca959c	184	case Opt_indirect:
a92daf6b	185	set_autofs_type_indirect(type);
34ca959c IK	186	break;
34ca959c IK	187	case Opt_direct:
a92daf6b	188	set_autofs_type_direct(type);
34ca959c IK	189	break;
34ca959c IK	190	case Opt_offset:
a92daf6b	191	set_autofs_type_offset(type);
34ca959c	192	break;
1da177e4 LT	193	default:
	194	return 1;
	195	}
	196	}
	197	return (*pipefd < 0);
	198	}
	199
1da177e4 LT	200	int autofs4_fill_super(struct super_block s, void data, int silent)
	201	{
	202	struct inode * root_inode;
	203	struct dentry * root;
	204	struct file * pipe;
	205	int pipefd;
	206	struct autofs_sb_info *sbi;
	207	struct autofs_info *ino;
1da177e4	208
b63d50c4	209	sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
d78e53c8	210	if (!sbi)
1da177e4 LT	211	goto fail_unlock;
	212	DPRINTK("starting up, sbi = %p",sbi);
	213
1da177e4 LT	214	s->s_fs_info = sbi;
1da177e4 LT	215	sbi->magic = AUTOFS_SBI_MAGIC;
d7c4a5f1	216	sbi->pipefd = -1;
ba8df43c IK	217	sbi->pipe = NULL;
ba8df43c IK	218	sbi->catatonic = 1;
1da177e4	219	sbi->exp_timeout = 0;
a47afb0f	220	sbi->oz_pgrp = task_pgrp_nr(current);
1da177e4 LT	221	sbi->sb = s;
	222	sbi->version = 0;
	223	sbi->sub_version = 0;
a92daf6b	224	set_autofs_type_indirect(&sbi->type);
d7c4a5f1 IK	225	sbi->min_proto = 0;
d7c4a5f1 IK	226	sbi->max_proto = 0;
1d5599e3	227	mutex_init(&sbi->wq_mutex);
3a9720ce	228	spin_lock_init(&sbi->fs_lock);
1da177e4	229	sbi->queues = NULL;
5f6f4f28	230	spin_lock_init(&sbi->lookup_lock);
25767378	231	INIT_LIST_HEAD(&sbi->active_list);
5f6f4f28	232	INIT_LIST_HEAD(&sbi->expiring_list);
1da177e4 LT	233	s->s_blocksize = 1024;
	234	s->s_blocksize_bits = 10;
	235	s->s_magic = AUTOFS_SUPER_MAGIC;
	236	s->s_op = &autofs4_sops;
b650c858	237	s->s_d_op = &autofs4_dentry_operations;
1da177e4 LT	238	s->s_time_gran = 1;
	239
	240	/*
	241	* Get the root inode and dentry, but defer checking for errors.
	242	*/
26e6c910	243	ino = autofs4_new_ino(sbi);
1da177e4 LT	244	if (!ino)
1da177e4 LT	245	goto fail_free;
726a5e06	246	root_inode = autofs4_get_inode(s, S_IFDIR \| 0755);
1da177e4	247	if (!root_inode)
34ca959c	248	goto fail_ino;
1da177e4	249
1da177e4	250	root = d_alloc_root(root_inode);
1da177e4 LT	251	if (!root)
1da177e4 LT	252	goto fail_iput;
34ca959c IK	253	pipe = NULL;
34ca959c IK	254
34ca959c	255	root->d_fsdata = ino;
1da177e4 LT	256
1da177e4 LT	257	/* Can this call block? */
d78e53c8 SB	258	if (parse_options(data, &pipefd, &root_inode->i_uid, &root_inode->i_gid,
	259	&sbi->oz_pgrp, &sbi->type, &sbi->min_proto,
	260	&sbi->max_proto)) {
1da177e4 LT	261	printk("autofs: called with bogus options\n");
	262	goto fail_dput;
	263	}
	264
b650c858	265	if (autofs_type_trigger(sbi->type))
b5b80177	266	__managed_dentry_set_managed(root);
10584211	267
34ca959c	268	root_inode->i_fop = &autofs4_root_operations;
e61da20a	269	root_inode->i_op = &autofs4_dir_inode_operations;
34ca959c	270
1da177e4	271	/* Couldn't this be tested earlier? */
d7c4a5f1 IK	272	if (sbi->max_proto < AUTOFS_MIN_PROTO_VERSION \|\|
d7c4a5f1 IK	273	sbi->min_proto > AUTOFS_MAX_PROTO_VERSION) {
1da177e4 LT	274	printk("autofs: kernel does not match daemon version "
1da177e4 LT	275	"daemon (%d, %d) kernel (%d, %d)\n",
d7c4a5f1	276	sbi->min_proto, sbi->max_proto,
1da177e4 LT	277	AUTOFS_MIN_PROTO_VERSION, AUTOFS_MAX_PROTO_VERSION);
	278	goto fail_dput;
	279	}
	280
d7c4a5f1 IK	281	/* Establish highest kernel protocol version */
	282	if (sbi->max_proto > AUTOFS_MAX_PROTO_VERSION)
	283	sbi->version = AUTOFS_MAX_PROTO_VERSION;
	284	else
	285	sbi->version = sbi->max_proto;
1da177e4 LT	286	sbi->sub_version = AUTOFS_PROTO_SUBVERSION;
	287
	288	DPRINTK("pipe fd = %d, pgrp = %u", pipefd, sbi->oz_pgrp);
	289	pipe = fget(pipefd);
	290
d78e53c8	291	if (!pipe) {
1da177e4 LT	292	printk("autofs: could not open pipe file descriptor\n");
	293	goto fail_dput;
	294	}
d78e53c8	295	if (!pipe->f_op \|\| !pipe->f_op->write)
1da177e4 LT	296	goto fail_fput;
1da177e4 LT	297	sbi->pipe = pipe;
d7c4a5f1	298	sbi->pipefd = pipefd;
ba8df43c	299	sbi->catatonic = 0;
1da177e4 LT	300
	301	/*
	302	* Success! Install the root dentry now to indicate completion.
	303	*/
	304	s->s_root = root;
	305	return 0;
	306
	307	/*
	308	* Failure ... clean up.
	309	*/
	310	fail_fput:
	311	printk("autofs: pipe file descriptor does not contain proper ops\n");
	312	fput(pipe);
	313	/* fall through */
	314	fail_dput:
	315	dput(root);
	316	goto fail_free;
	317	fail_iput:
	318	printk("autofs: get root dentry failed\n");
	319	iput(root_inode);
34ca959c IK	320	fail_ino:
34ca959c IK	321	kfree(ino);
1da177e4 LT	322	fail_free:
1da177e4 LT	323	kfree(sbi);
ba8df43c	324	s->s_fs_info = NULL;
1da177e4 LT	325	fail_unlock:
	326	return -EINVAL;
	327	}
	328
726a5e06	329	struct inode autofs4_get_inode(struct super_block sb, mode_t mode)
1da177e4 LT	330	{
	331	struct inode *inode = new_inode(sb);
	332
	333	if (inode == NULL)
	334	return NULL;
	335
09f12c03	336	inode->i_mode = mode;
1da177e4 LT	337	if (sb->s_root) {
	338	inode->i_uid = sb->s_root->d_inode->i_uid;
	339	inode->i_gid = sb->s_root->d_inode->i_gid;
1da177e4	340	}
1da177e4	341	inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
85fe4025	342	inode->i_ino = get_next_ino();
1da177e4	343
09f12c03	344	if (S_ISDIR(mode)) {
1da177e4 LT	345	inode->i_nlink = 2;
	346	inode->i_op = &autofs4_dir_inode_operations;
	347	inode->i_fop = &autofs4_dir_operations;
09f12c03	348	} else if (S_ISLNK(mode)) {
1da177e4 LT	349	inode->i_op = &autofs4_symlink_inode_operations;
	350	}
	351
	352	return inode;
	353	}