[linux-2.6-block.git] / fs / autofs4 / inode.c

/* -*- c -*- --------------------------------------------------------------- *
 *
 * linux/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/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_init_ino(struct autofs_info *ino,
				     struct autofs_sb_info *sbi)
{
	int reinit = 1;

	if (ino == NULL) {
		reinit = 0;
		ino = kmalloc(sizeof(*ino), GFP_KERNEL);
	}

	if (ino == NULL)
		return NULL;

	if (!reinit) {
		ino->flags = 0;
		ino->dentry = NULL;
		INIT_LIST_HEAD(&ino->active);
		ino->active_count = 0;
		INIT_LIST_HEAD(&ino->expiring);
		atomic_set(&ino->count, 0);
	}

	ino->uid = 0;
	ino->gid = 0;
	ino->last_used = jiffies;

	ino->sbi = sbi;

	return ino;
}

void autofs4_free_ino(struct autofs_info *ino)
{
	if (ino->dentry) {
		ino->dentry->d_fsdata = NULL;
		ino->dentry = NULL;
	}
	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_init_ino(NULL, 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 <raven@themaw.net>
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
1da177e4	25	struct autofs_info autofs4_init_ino(struct autofs_info ino,
09f12c03	26	struct autofs_sb_info *sbi)
1da177e4 LT	27	{
	28	int reinit = 1;
	29
	30	if (ino == NULL) {
	31	reinit = 0;
	32	ino = kmalloc(sizeof(*ino), GFP_KERNEL);
	33	}
	34
	35	if (ino == NULL)
	36	return NULL;
	37
25767378 IK	38	if (!reinit) {
25767378 IK	39	ino->flags = 0;
25767378	40	ino->dentry = NULL;
25767378	41	INIT_LIST_HEAD(&ino->active);
4f8427d1	42	ino->active_count = 0;
25767378 IK	43	INIT_LIST_HEAD(&ino->expiring);
	44	atomic_set(&ino->count, 0);
	45	}
f50b6f86	46
c0f54d3e IK	47	ino->uid = 0;
c0f54d3e IK	48	ino->gid = 0;
1da177e4 LT	49	ino->last_used = jiffies;
	50
	51	ino->sbi = sbi;
	52
1da177e4 LT	53	return ino;
	54	}
	55
	56	void autofs4_free_ino(struct autofs_info *ino)
	57	{
	58	if (ino->dentry) {
	59	ino->dentry->d_fsdata = NULL;
1da177e4 LT	60	ino->dentry = NULL;
1da177e4 LT	61	}
1da177e4 LT	62	kfree(ino);
	63	}
	64
6ce31523	65	void autofs4_kill_sb(struct super_block *sb)
1da177e4 LT	66	{
	67	struct autofs_sb_info *sbi = autofs4_sbi(sb);
	68
ba8df43c IK	69	/*
	70	* In the event of a failure in get_sb_nodev the superblock
	71	* info is not present so nothing else has been setup, so
c949d4eb JK	72	* just call kill_anon_super when we are called from
c949d4eb JK	73	* deactivate_super.
ba8df43c IK	74	*/
ba8df43c IK	75	if (!sbi)
c949d4eb	76	goto out_kill_sb;
ba8df43c	77
5a11d4d0 IK	78	/* Free wait queues, close pipe */
5a11d4d0 IK	79	autofs4_catatonic_mode(sbi);
1da177e4	80
f50b6f86	81	sb->s_fs_info = NULL;
1da177e4 LT	82	kfree(sbi);
1da177e4 LT	83
c949d4eb	84	out_kill_sb:
1da177e4	85	DPRINTK("shutting down");
5b7e934d	86	kill_litter_super(sb);
1da177e4 LT	87	}
1da177e4 LT	88
d7c4a5f1 IK	89	static int autofs4_show_options(struct seq_file m, struct vfsmount mnt)
	90	{
	91	struct autofs_sb_info *sbi = autofs4_sbi(mnt->mnt_sb);
aef97cb9	92	struct inode *root_inode = mnt->mnt_sb->s_root->d_inode;
d7c4a5f1 IK	93
	94	if (!sbi)
	95	return 0;
	96
	97	seq_printf(m, ",fd=%d", sbi->pipefd);
aef97cb9 MS	98	if (root_inode->i_uid != 0)
	99	seq_printf(m, ",uid=%u", root_inode->i_uid);
	100	if (root_inode->i_gid != 0)
	101	seq_printf(m, ",gid=%u", root_inode->i_gid);
d7c4a5f1 IK	102	seq_printf(m, ",pgrp=%d", sbi->oz_pgrp);
	103	seq_printf(m, ",timeout=%lu", sbi->exp_timeout/HZ);
	104	seq_printf(m, ",minproto=%d", sbi->min_proto);
	105	seq_printf(m, ",maxproto=%d", sbi->max_proto);
	106
a92daf6b	107	if (autofs_type_offset(sbi->type))
34ca959c	108	seq_printf(m, ",offset");
a92daf6b	109	else if (autofs_type_direct(sbi->type))
34ca959c IK	110	seq_printf(m, ",direct");
	111	else
	112	seq_printf(m, ",indirect");
	113
d7c4a5f1 IK	114	return 0;
	115	}
	116
292c5ee8 AV	117	static void autofs4_evict_inode(struct inode *inode)
	118	{
	119	end_writeback(inode);
	120	kfree(inode->i_private);
	121	}
	122
ee9b6d61	123	static const struct super_operations autofs4_sops = {
1da177e4	124	.statfs = simple_statfs,
d7c4a5f1	125	.show_options = autofs4_show_options,
292c5ee8	126	.evict_inode = autofs4_evict_inode,
1da177e4 LT	127	};
1da177e4 LT	128
34ca959c IK	129	enum {Opt_err, Opt_fd, Opt_uid, Opt_gid, Opt_pgrp, Opt_minproto, Opt_maxproto,
34ca959c IK	130	Opt_indirect, Opt_direct, Opt_offset};
1da177e4	131
a447c093	132	static const match_table_t tokens = {
1da177e4 LT	133	{Opt_fd, "fd=%u"},
	134	{Opt_uid, "uid=%u"},
	135	{Opt_gid, "gid=%u"},
	136	{Opt_pgrp, "pgrp=%u"},
	137	{Opt_minproto, "minproto=%u"},
	138	{Opt_maxproto, "maxproto=%u"},
34ca959c IK	139	{Opt_indirect, "indirect"},
	140	{Opt_direct, "direct"},
	141	{Opt_offset, "offset"},
1da177e4 LT	142	{Opt_err, NULL}
	143	};
	144
	145	static int parse_options(char options, int pipefd, uid_t uid, gid_t gid,
d78e53c8	146	pid_t pgrp, unsigned int type, int minproto, int maxproto)
1da177e4 LT	147	{
	148	char *p;
	149	substring_t args[MAX_OPT_ARGS];
	150	int option;
	151
0eb790e3 DH	152	*uid = current_uid();
0eb790e3 DH	153	*gid = current_gid();
a47afb0f	154	*pgrp = task_pgrp_nr(current);
1da177e4 LT	155
	156	*minproto = AUTOFS_MIN_PROTO_VERSION;
	157	*maxproto = AUTOFS_MAX_PROTO_VERSION;
	158
	159	*pipefd = -1;
	160
	161	if (!options)
	162	return 1;
	163
	164	while ((p = strsep(&options, ",")) != NULL) {
	165	int token;
	166	if (!*p)
	167	continue;
	168
	169	token = match_token(p, tokens, args);
	170	switch (token) {
	171	case Opt_fd:
	172	if (match_int(args, pipefd))
	173	return 1;
	174	break;
	175	case Opt_uid:
	176	if (match_int(args, &option))
	177	return 1;
	178	*uid = option;
	179	break;
	180	case Opt_gid:
	181	if (match_int(args, &option))
	182	return 1;
	183	*gid = option;
	184	break;
	185	case Opt_pgrp:
	186	if (match_int(args, &option))
	187	return 1;
	188	*pgrp = option;
	189	break;
	190	case Opt_minproto:
	191	if (match_int(args, &option))
	192	return 1;
	193	*minproto = option;
	194	break;
	195	case Opt_maxproto:
	196	if (match_int(args, &option))
	197	return 1;
	198	*maxproto = option;
	199	break;
34ca959c	200	case Opt_indirect:
a92daf6b	201	set_autofs_type_indirect(type);
34ca959c IK	202	break;
34ca959c IK	203	case Opt_direct:
a92daf6b	204	set_autofs_type_direct(type);
34ca959c IK	205	break;
34ca959c IK	206	case Opt_offset:
a92daf6b	207	set_autofs_type_offset(type);
34ca959c	208	break;
1da177e4 LT	209	default:
	210	return 1;
	211	}
	212	}
	213	return (*pipefd < 0);
	214	}
	215
1da177e4 LT	216	int autofs4_fill_super(struct super_block s, void data, int silent)
	217	{
	218	struct inode * root_inode;
	219	struct dentry * root;
	220	struct file * pipe;
	221	int pipefd;
	222	struct autofs_sb_info *sbi;
	223	struct autofs_info *ino;
1da177e4	224
b63d50c4	225	sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
d78e53c8	226	if (!sbi)
1da177e4 LT	227	goto fail_unlock;
	228	DPRINTK("starting up, sbi = %p",sbi);
	229
1da177e4 LT	230	s->s_fs_info = sbi;
1da177e4 LT	231	sbi->magic = AUTOFS_SBI_MAGIC;
d7c4a5f1	232	sbi->pipefd = -1;
ba8df43c IK	233	sbi->pipe = NULL;
ba8df43c IK	234	sbi->catatonic = 1;
1da177e4	235	sbi->exp_timeout = 0;
a47afb0f	236	sbi->oz_pgrp = task_pgrp_nr(current);
1da177e4 LT	237	sbi->sb = s;
	238	sbi->version = 0;
	239	sbi->sub_version = 0;
a92daf6b	240	set_autofs_type_indirect(&sbi->type);
d7c4a5f1 IK	241	sbi->min_proto = 0;
d7c4a5f1 IK	242	sbi->max_proto = 0;
1d5599e3	243	mutex_init(&sbi->wq_mutex);
3a9720ce	244	spin_lock_init(&sbi->fs_lock);
1da177e4	245	sbi->queues = NULL;
5f6f4f28	246	spin_lock_init(&sbi->lookup_lock);
25767378	247	INIT_LIST_HEAD(&sbi->active_list);
5f6f4f28	248	INIT_LIST_HEAD(&sbi->expiring_list);
1da177e4 LT	249	s->s_blocksize = 1024;
	250	s->s_blocksize_bits = 10;
	251	s->s_magic = AUTOFS_SUPER_MAGIC;
	252	s->s_op = &autofs4_sops;
b650c858	253	s->s_d_op = &autofs4_dentry_operations;
1da177e4 LT	254	s->s_time_gran = 1;
	255
	256	/*
	257	* Get the root inode and dentry, but defer checking for errors.
	258	*/
09f12c03	259	ino = autofs4_init_ino(NULL, sbi);
1da177e4 LT	260	if (!ino)
1da177e4 LT	261	goto fail_free;
726a5e06	262	root_inode = autofs4_get_inode(s, S_IFDIR \| 0755);
1da177e4	263	if (!root_inode)
34ca959c	264	goto fail_ino;
1da177e4	265
1da177e4	266	root = d_alloc_root(root_inode);
1da177e4 LT	267	if (!root)
1da177e4 LT	268	goto fail_iput;
34ca959c IK	269	pipe = NULL;
34ca959c IK	270
34ca959c	271	root->d_fsdata = ino;
1da177e4 LT	272
1da177e4 LT	273	/* Can this call block? */
d78e53c8 SB	274	if (parse_options(data, &pipefd, &root_inode->i_uid, &root_inode->i_gid,
	275	&sbi->oz_pgrp, &sbi->type, &sbi->min_proto,
	276	&sbi->max_proto)) {
1da177e4 LT	277	printk("autofs: called with bogus options\n");
	278	goto fail_dput;
	279	}
	280
b650c858	281	if (autofs_type_trigger(sbi->type))
b5b80177	282	__managed_dentry_set_managed(root);
10584211	283
34ca959c	284	root_inode->i_fop = &autofs4_root_operations;
e61da20a	285	root_inode->i_op = &autofs4_dir_inode_operations;
34ca959c	286
1da177e4	287	/* Couldn't this be tested earlier? */
d7c4a5f1 IK	288	if (sbi->max_proto < AUTOFS_MIN_PROTO_VERSION \|\|
d7c4a5f1 IK	289	sbi->min_proto > AUTOFS_MAX_PROTO_VERSION) {
1da177e4 LT	290	printk("autofs: kernel does not match daemon version "
1da177e4 LT	291	"daemon (%d, %d) kernel (%d, %d)\n",
d7c4a5f1	292	sbi->min_proto, sbi->max_proto,
1da177e4 LT	293	AUTOFS_MIN_PROTO_VERSION, AUTOFS_MAX_PROTO_VERSION);
	294	goto fail_dput;
	295	}
	296
d7c4a5f1 IK	297	/* Establish highest kernel protocol version */
	298	if (sbi->max_proto > AUTOFS_MAX_PROTO_VERSION)
	299	sbi->version = AUTOFS_MAX_PROTO_VERSION;
	300	else
	301	sbi->version = sbi->max_proto;
1da177e4 LT	302	sbi->sub_version = AUTOFS_PROTO_SUBVERSION;
	303
	304	DPRINTK("pipe fd = %d, pgrp = %u", pipefd, sbi->oz_pgrp);
	305	pipe = fget(pipefd);
	306
d78e53c8	307	if (!pipe) {
1da177e4 LT	308	printk("autofs: could not open pipe file descriptor\n");
	309	goto fail_dput;
	310	}
d78e53c8	311	if (!pipe->f_op \|\| !pipe->f_op->write)
1da177e4 LT	312	goto fail_fput;
1da177e4 LT	313	sbi->pipe = pipe;
d7c4a5f1	314	sbi->pipefd = pipefd;
ba8df43c	315	sbi->catatonic = 0;
1da177e4 LT	316
	317	/*
	318	* Success! Install the root dentry now to indicate completion.
	319	*/
	320	s->s_root = root;
	321	return 0;
	322
	323	/*
	324	* Failure ... clean up.
	325	*/
	326	fail_fput:
	327	printk("autofs: pipe file descriptor does not contain proper ops\n");
	328	fput(pipe);
	329	/* fall through */
	330	fail_dput:
	331	dput(root);
	332	goto fail_free;
	333	fail_iput:
	334	printk("autofs: get root dentry failed\n");
	335	iput(root_inode);
34ca959c IK	336	fail_ino:
34ca959c IK	337	kfree(ino);
1da177e4 LT	338	fail_free:
1da177e4 LT	339	kfree(sbi);
ba8df43c	340	s->s_fs_info = NULL;
1da177e4 LT	341	fail_unlock:
	342	return -EINVAL;
	343	}
	344
726a5e06	345	struct inode autofs4_get_inode(struct super_block sb, mode_t mode)
1da177e4 LT	346	{
	347	struct inode *inode = new_inode(sb);
	348
	349	if (inode == NULL)
	350	return NULL;
	351
09f12c03	352	inode->i_mode = mode;
1da177e4 LT	353	if (sb->s_root) {
	354	inode->i_uid = sb->s_root->d_inode->i_uid;
	355	inode->i_gid = sb->s_root->d_inode->i_gid;
1da177e4	356	}
1da177e4	357	inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
85fe4025	358	inode->i_ino = get_next_ino();
1da177e4	359
09f12c03	360	if (S_ISDIR(mode)) {
1da177e4 LT	361	inode->i_nlink = 2;
	362	inode->i_op = &autofs4_dir_inode_operations;
	363	inode->i_fop = &autofs4_dir_operations;
09f12c03	364	} else if (S_ISLNK(mode)) {
1da177e4 LT	365	inode->i_op = &autofs4_symlink_inode_operations;
	366	}
	367
	368	return inode;
	369	}