[deliverable/linux.git] / fs / autofs4 / autofs_i.h

/* -*- c -*- ------------------------------------------------------------- *
 *   
 * linux/fs/autofs/autofs_i.h
 *
 *   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.
 *
 * ----------------------------------------------------------------------- */

/* Internal header file for autofs */

#include <linux/auto_fs4.h>
#include <linux/auto_dev-ioctl.h>
#include <linux/mutex.h>
#include <linux/spinlock.h>
#include <linux/list.h>

/* This is the range of ioctl() numbers we claim as ours */
#define AUTOFS_IOC_FIRST     AUTOFS_IOC_READY
#define AUTOFS_IOC_COUNT     32

#define AUTOFS_DEV_IOCTL_IOC_FIRST	(AUTOFS_DEV_IOCTL_VERSION)
#define AUTOFS_DEV_IOCTL_IOC_COUNT	(AUTOFS_IOC_COUNT - 11)

#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/time.h>
#include <linux/string.h>
#include <linux/wait.h>
#include <linux/sched.h>
#include <linux/mount.h>
#include <linux/namei.h>
#include <asm/current.h>
#include <asm/uaccess.h>

/* #define DEBUG */

#ifdef DEBUG
#define DPRINTK(fmt, args...)				\
do {							\
	printk(KERN_DEBUG "pid %d: %s: " fmt "\n",	\
		current->pid, __func__, ##args);	\
} while (0)
#else
#define DPRINTK(fmt, args...) do {} while (0)
#endif

#define AUTOFS_WARN(fmt, args...)			\
do {							\
	printk(KERN_WARNING "pid %d: %s: " fmt "\n",	\
		current->pid, __func__, ##args);	\
} while (0)

#define AUTOFS_ERROR(fmt, args...)			\
do {							\
	printk(KERN_ERR "pid %d: %s: " fmt "\n",	\
		current->pid, __func__, ##args);	\
} while (0)

extern spinlock_t autofs4_lock;

/* Unified info structure.  This is pointed to by both the dentry and
   inode structures.  Each file in the filesystem has an instance of this
   structure.  It holds a reference to the dentry, so dentries are never
   flushed while the file exists.  All name lookups are dealt with at the
   dentry level, although the filesystem can interfere in the validation
   process.  Readdir is implemented by traversing the dentry lists. */
struct autofs_info {
	struct dentry	*dentry;
	struct inode	*inode;

	int		flags;

	struct completion expire_complete;

	struct list_head active;
	int active_count;

	struct list_head expiring;

	struct autofs_sb_info *sbi;
	unsigned long last_used;
	atomic_t count;

	uid_t uid;
	gid_t gid;

	mode_t	mode;
	size_t	size;

	void (*free)(struct autofs_info *);
	union {
		const char *symlink;
	} u;
};

#define AUTOFS_INF_EXPIRING	(1<<0) /* dentry is in the process of expiring */
#define AUTOFS_INF_PENDING	(1<<2) /* dentry pending mount */

struct autofs_wait_queue {
	wait_queue_head_t queue;
	struct autofs_wait_queue *next;
	autofs_wqt_t wait_queue_token;
	/* We use the following to see what we are waiting for */
	struct qstr name;
	u32 dev;
	u64 ino;
	uid_t uid;
	gid_t gid;
	pid_t pid;
	pid_t tgid;
	/* This is for status reporting upon return */
	int status;
	unsigned int wait_ctr;
};

#define AUTOFS_SBI_MAGIC 0x6d4a556d

struct autofs_sb_info {
	u32 magic;
	int pipefd;
	struct file *pipe;
	pid_t oz_pgrp;
	int catatonic;
	int version;
	int sub_version;
	int min_proto;
	int max_proto;
	unsigned long exp_timeout;
	unsigned int type;
	int reghost_enabled;
	int needs_reghost;
	struct super_block *sb;
	struct mutex wq_mutex;
	spinlock_t fs_lock;
	struct autofs_wait_queue *queues; /* Wait queue pointer */
	spinlock_t lookup_lock;
	struct list_head active_list;
	struct list_head expiring_list;
};

static inline struct autofs_sb_info *autofs4_sbi(struct super_block *sb)
{
	return (struct autofs_sb_info *)(sb->s_fs_info);
}

static inline struct autofs_info *autofs4_dentry_ino(struct dentry *dentry)
{
	return (struct autofs_info *)(dentry->d_fsdata);
}

/* autofs4_oz_mode(): do we see the man behind the curtain?  (The
   processes which do manipulations for us in user space sees the raw
   filesystem without "magic".) */

static inline int autofs4_oz_mode(struct autofs_sb_info *sbi) {
	return sbi->catatonic || task_pgrp_nr(current) == sbi->oz_pgrp;
}

/* Does a dentry have some pending activity? */
static inline int autofs4_ispending(struct dentry *dentry)
{
	struct autofs_info *inf = autofs4_dentry_ino(dentry);

	if (inf->flags & AUTOFS_INF_PENDING)
		return 1;

	if (inf->flags & AUTOFS_INF_EXPIRING)
		return 1;

	return 0;
}

struct inode *autofs4_get_inode(struct super_block *, struct autofs_info *);
void autofs4_free_ino(struct autofs_info *);

/* Expiration */
int is_autofs4_dentry(struct dentry *);
int autofs4_expire_wait(struct dentry *dentry);
int autofs4_expire_run(struct super_block *, struct vfsmount *,
			struct autofs_sb_info *,
			struct autofs_packet_expire __user *);
int autofs4_do_expire_multi(struct super_block *sb, struct vfsmount *mnt,
			    struct autofs_sb_info *sbi, int when);
int autofs4_expire_multi(struct super_block *, struct vfsmount *,
			struct autofs_sb_info *, int __user *);
struct dentry *autofs4_expire_direct(struct super_block *sb,
				     struct vfsmount *mnt,
				     struct autofs_sb_info *sbi, int how);
struct dentry *autofs4_expire_indirect(struct super_block *sb,
				       struct vfsmount *mnt,
				       struct autofs_sb_info *sbi, int how);

/* Device node initialization */

int autofs_dev_ioctl_init(void);
void autofs_dev_ioctl_exit(void);

/* Operations structures */

extern const struct inode_operations autofs4_symlink_inode_operations;
extern const struct inode_operations autofs4_dir_inode_operations;
extern const struct inode_operations autofs4_root_inode_operations;
extern const struct inode_operations autofs4_indirect_root_inode_operations;
extern const struct inode_operations autofs4_direct_root_inode_operations;
extern const struct file_operations autofs4_dir_operations;
extern const struct file_operations autofs4_root_operations;

/* Operations methods */

struct vfsmount *autofs4_d_automount(struct path *);
int autofs4_d_manage(struct dentry *, bool);

/* VFS automount flags management functions */

static inline void __managed_dentry_set_automount(struct dentry *dentry)
{
	dentry->d_flags |= DCACHE_NEED_AUTOMOUNT;
}

static inline void managed_dentry_set_automount(struct dentry *dentry)
{
	spin_lock(&dentry->d_lock);
	__managed_dentry_set_automount(dentry);
	spin_unlock(&dentry->d_lock);
}

static inline void __managed_dentry_clear_automount(struct dentry *dentry)
{
	dentry->d_flags &= ~DCACHE_NEED_AUTOMOUNT;
}

static inline void managed_dentry_clear_automount(struct dentry *dentry)
{
	spin_lock(&dentry->d_lock);
	__managed_dentry_clear_automount(dentry);
	spin_unlock(&dentry->d_lock);
}

static inline void __managed_dentry_set_transit(struct dentry *dentry)
{
	dentry->d_flags |= DCACHE_MANAGE_TRANSIT;
}

static inline void managed_dentry_set_transit(struct dentry *dentry)
{
	spin_lock(&dentry->d_lock);
	__managed_dentry_set_transit(dentry);
	spin_unlock(&dentry->d_lock);
}

static inline void __managed_dentry_clear_transit(struct dentry *dentry)
{
	dentry->d_flags &= ~DCACHE_MANAGE_TRANSIT;
}

static inline void managed_dentry_clear_transit(struct dentry *dentry)
{
	spin_lock(&dentry->d_lock);
	__managed_dentry_clear_transit(dentry);
	spin_unlock(&dentry->d_lock);
}

static inline void __managed_dentry_set_managed(struct dentry *dentry)
{
	dentry->d_flags |= (DCACHE_NEED_AUTOMOUNT|DCACHE_MANAGE_TRANSIT);
}

static inline void managed_dentry_set_managed(struct dentry *dentry)
{
	spin_lock(&dentry->d_lock);
	__managed_dentry_set_managed(dentry);
	spin_unlock(&dentry->d_lock);
}

static inline void __managed_dentry_clear_managed(struct dentry *dentry)
{
	dentry->d_flags &= ~(DCACHE_NEED_AUTOMOUNT|DCACHE_MANAGE_TRANSIT);
}

static inline void managed_dentry_clear_managed(struct dentry *dentry)
{
	spin_lock(&dentry->d_lock);
	__managed_dentry_clear_managed(dentry);
	spin_unlock(&dentry->d_lock);
}

/* Initializing function */

int autofs4_fill_super(struct super_block *, void *, int);
struct autofs_info *autofs4_init_ino(struct autofs_info *, struct autofs_sb_info *sbi, mode_t mode);

/* Queue management functions */

int autofs4_wait(struct autofs_sb_info *,struct dentry *, enum autofs_notify);
int autofs4_wait_release(struct autofs_sb_info *,autofs_wqt_t,int);
void autofs4_catatonic_mode(struct autofs_sb_info *);

static inline u32 autofs4_get_dev(struct autofs_sb_info *sbi)
{
	return new_encode_dev(sbi->sb->s_dev);
}

static inline u64 autofs4_get_ino(struct autofs_sb_info *sbi)
{
	return sbi->sb->s_root->d_inode->i_ino;
}

static inline int simple_positive(struct dentry *dentry)
{
	return dentry->d_inode && !d_unhashed(dentry);
}

static inline void __autofs4_add_expiring(struct dentry *dentry)
{
	struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
	struct autofs_info *ino = autofs4_dentry_ino(dentry);
	if (ino) {
		if (list_empty(&ino->expiring))
			list_add(&ino->expiring, &sbi->expiring_list);
	}
	return;
}

static inline void autofs4_add_expiring(struct dentry *dentry)
{
	struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
	struct autofs_info *ino = autofs4_dentry_ino(dentry);
	if (ino) {
		spin_lock(&sbi->lookup_lock);
		if (list_empty(&ino->expiring))
			list_add(&ino->expiring, &sbi->expiring_list);
		spin_unlock(&sbi->lookup_lock);
	}
	return;
}

static inline void autofs4_del_expiring(struct dentry *dentry)
{
	struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
	struct autofs_info *ino = autofs4_dentry_ino(dentry);
	if (ino) {
		spin_lock(&sbi->lookup_lock);
		if (!list_empty(&ino->expiring))
			list_del_init(&ino->expiring);
		spin_unlock(&sbi->lookup_lock);
	}
	return;
}

void autofs4_dentry_release(struct dentry *);
extern void autofs4_kill_sb(struct super_block *);
Commit	Line	Data
1da177e4 LT	1	/* -- c -- ------------------------------------------------------------- *
	2	*
	3	* linux/fs/autofs/autofs_i.h
	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	/* Internal header file for autofs */
	15
	16	#include <linux/auto_fs4.h>
8d7b48e0	17	#include <linux/auto_dev-ioctl.h>
1d5599e3	18	#include <linux/mutex.h>
b5c84bf6	19	#include <linux/spinlock.h>
1da177e4 LT	20	#include <linux/list.h>
	21
	22	/* This is the range of ioctl() numbers we claim as ours */
	23	#define AUTOFS_IOC_FIRST AUTOFS_IOC_READY
	24	#define AUTOFS_IOC_COUNT 32
	25
8d7b48e0 IK	26	#define AUTOFS_DEV_IOCTL_IOC_FIRST (AUTOFS_DEV_IOCTL_VERSION)
	27	#define AUTOFS_DEV_IOCTL_IOC_COUNT (AUTOFS_IOC_COUNT - 11)
	28
1da177e4 LT	29	#include <linux/kernel.h>
	30	#include <linux/slab.h>
	31	#include <linux/time.h>
	32	#include <linux/string.h>
	33	#include <linux/wait.h>
	34	#include <linux/sched.h>
	35	#include <linux/mount.h>
	36	#include <linux/namei.h>
	37	#include <asm/current.h>
	38	#include <asm/uaccess.h>
	39
	40	/* #define DEBUG */
	41
	42	#ifdef DEBUG
8d7b48e0 IK	43	#define DPRINTK(fmt, args...) \
	44	do { \
	45	printk(KERN_DEBUG "pid %d: %s: " fmt "\n", \
	46	current->pid, __func__, ##args); \
	47	} while (0)
1da177e4	48	#else
8d7b48e0	49	#define DPRINTK(fmt, args...) do {} while (0)
1da177e4 LT	50	#endif
1da177e4 LT	51
8d7b48e0 IK	52	#define AUTOFS_WARN(fmt, args...) \
	53	do { \
	54	printk(KERN_WARNING "pid %d: %s: " fmt "\n", \
	55	current->pid, __func__, ##args); \
	56	} while (0)
	57
	58	#define AUTOFS_ERROR(fmt, args...) \
	59	do { \
	60	printk(KERN_ERR "pid %d: %s: " fmt "\n", \
	61	current->pid, __func__, ##args); \
	62	} while (0)
	63
b5c84bf6 NP	64	extern spinlock_t autofs4_lock;
b5c84bf6 NP	65
1da177e4 LT	66	/* Unified info structure. This is pointed to by both the dentry and
	67	inode structures. Each file in the filesystem has an instance of this
	68	structure. It holds a reference to the dentry, so dentries are never
	69	flushed while the file exists. All name lookups are dealt with at the
	70	dentry level, although the filesystem can interfere in the validation
	71	process. Readdir is implemented by traversing the dentry lists. */
	72	struct autofs_info {
	73	struct dentry *dentry;
	74	struct inode *inode;
	75
	76	int flags;
	77
6e60a9ab IK	78	struct completion expire_complete;
6e60a9ab IK	79
25767378	80	struct list_head active;
4f8427d1 IK	81	int active_count;
4f8427d1 IK	82
5f6f4f28	83	struct list_head expiring;
f50b6f86	84
1da177e4 LT	85	struct autofs_sb_info *sbi;
1da177e4 LT	86	unsigned long last_used;
1aff3c8b	87	atomic_t count;
1da177e4	88
c0f54d3e IK	89	uid_t uid;
	90	gid_t gid;
	91
1da177e4 LT	92	mode_t mode;
	93	size_t size;
	94
	95	void (free)(struct autofs_info );
	96	union {
	97	const char *symlink;
	98	} u;
	99	};
	100
	101	#define AUTOFS_INF_EXPIRING (1<<0) /* dentry is in the process of expiring */
aa952eb2	102	#define AUTOFS_INF_PENDING (1<<2) /* dentry pending mount */
1da177e4 LT	103
	104	struct autofs_wait_queue {
	105	wait_queue_head_t queue;
	106	struct autofs_wait_queue *next;
	107	autofs_wqt_t wait_queue_token;
	108	/* We use the following to see what we are waiting for */
70b52a0a	109	struct qstr name;
5c0a32fc IK	110	u32 dev;
	111	u64 ino;
	112	uid_t uid;
	113	gid_t gid;
	114	pid_t pid;
	115	pid_t tgid;
1da177e4 LT	116	/* This is for status reporting upon return */
1da177e4 LT	117	int status;
296f7bf7	118	unsigned int wait_ctr;
1da177e4 LT	119	};
	120
	121	#define AUTOFS_SBI_MAGIC 0x6d4a556d
	122
	123	struct autofs_sb_info {
	124	u32 magic;
d7c4a5f1	125	int pipefd;
1da177e4 LT	126	struct file *pipe;
	127	pid_t oz_pgrp;
	128	int catatonic;
	129	int version;
	130	int sub_version;
d7c4a5f1 IK	131	int min_proto;
d7c4a5f1 IK	132	int max_proto;
1da177e4	133	unsigned long exp_timeout;
34ca959c	134	unsigned int type;
1da177e4 LT	135	int reghost_enabled;
	136	int needs_reghost;
	137	struct super_block *sb;
1d5599e3	138	struct mutex wq_mutex;
3a9720ce	139	spinlock_t fs_lock;
1da177e4	140	struct autofs_wait_queue queues; / Wait queue pointer */
5f6f4f28	141	spinlock_t lookup_lock;
25767378	142	struct list_head active_list;
5f6f4f28	143	struct list_head expiring_list;
1da177e4 LT	144	};
	145
	146	static inline struct autofs_sb_info autofs4_sbi(struct super_block sb)
	147	{
	148	return (struct autofs_sb_info *)(sb->s_fs_info);
	149	}
	150
	151	static inline struct autofs_info autofs4_dentry_ino(struct dentry dentry)
	152	{
	153	return (struct autofs_info *)(dentry->d_fsdata);
	154	}
	155
	156	/* autofs4_oz_mode(): do we see the man behind the curtain? (The
	157	processes which do manipulations for us in user space sees the raw
	158	filesystem without "magic".) */
	159
	160	static inline int autofs4_oz_mode(struct autofs_sb_info *sbi) {
a47afb0f	161	return sbi->catatonic \|\| task_pgrp_nr(current) == sbi->oz_pgrp;
1da177e4 LT	162	}
	163
	164	/* Does a dentry have some pending activity? */
	165	static inline int autofs4_ispending(struct dentry *dentry)
	166	{
	167	struct autofs_info *inf = autofs4_dentry_ino(dentry);
	168
aa952eb2	169	if (inf->flags & AUTOFS_INF_PENDING)
3a9720ce IK	170	return 1;
3a9720ce IK	171
97e7449a IK	172	if (inf->flags & AUTOFS_INF_EXPIRING)
97e7449a IK	173	return 1;
3a9720ce	174
97e7449a	175	return 0;
1da177e4 LT	176	}
1da177e4 LT	177
1da177e4 LT	178	struct inode autofs4_get_inode(struct super_block , struct autofs_info *);
	179	void autofs4_free_ino(struct autofs_info *);
	180
	181	/* Expiration */
	182	int is_autofs4_dentry(struct dentry *);
06a35985	183	int autofs4_expire_wait(struct dentry *dentry);
1da177e4 LT	184	int autofs4_expire_run(struct super_block , struct vfsmount ,
	185	struct autofs_sb_info *,
	186	struct autofs_packet_expire __user *);
56fcef75 IK	187	int autofs4_do_expire_multi(struct super_block sb, struct vfsmount mnt,
56fcef75 IK	188	struct autofs_sb_info *sbi, int when);
1da177e4 LT	189	int autofs4_expire_multi(struct super_block , struct vfsmount ,
1da177e4 LT	190	struct autofs_sb_info , int __user );
8d7b48e0 IK	191	struct dentry autofs4_expire_direct(struct super_block sb,
	192	struct vfsmount *mnt,
	193	struct autofs_sb_info *sbi, int how);
	194	struct dentry autofs4_expire_indirect(struct super_block sb,
	195	struct vfsmount *mnt,
	196	struct autofs_sb_info *sbi, int how);
	197
	198	/* Device node initialization */
	199
	200	int autofs_dev_ioctl_init(void);
	201	void autofs_dev_ioctl_exit(void);
1da177e4 LT	202
	203	/* Operations structures */
	204
754661f1 AV	205	extern const struct inode_operations autofs4_symlink_inode_operations;
	206	extern const struct inode_operations autofs4_dir_inode_operations;
	207	extern const struct inode_operations autofs4_root_inode_operations;
	208	extern const struct inode_operations autofs4_indirect_root_inode_operations;
	209	extern const struct inode_operations autofs4_direct_root_inode_operations;
4b6f5d20 AV	210	extern const struct file_operations autofs4_dir_operations;
4b6f5d20 AV	211	extern const struct file_operations autofs4_root_operations;
1da177e4	212
10584211 IK	213	/* Operations methods */
	214
	215	struct vfsmount autofs4_d_automount(struct path );
b5b80177	216	int autofs4_d_manage(struct dentry *, bool);
10584211 IK	217
	218	/* VFS automount flags management functions */
	219
	220	static inline void __managed_dentry_set_automount(struct dentry *dentry)
	221	{
	222	dentry->d_flags \|= DCACHE_NEED_AUTOMOUNT;
	223	}
	224
	225	static inline void managed_dentry_set_automount(struct dentry *dentry)
	226	{
	227	spin_lock(&dentry->d_lock);
	228	__managed_dentry_set_automount(dentry);
	229	spin_unlock(&dentry->d_lock);
	230	}
	231
	232	static inline void __managed_dentry_clear_automount(struct dentry *dentry)
	233	{
	234	dentry->d_flags &= ~DCACHE_NEED_AUTOMOUNT;
	235	}
	236
	237	static inline void managed_dentry_clear_automount(struct dentry *dentry)
	238	{
	239	spin_lock(&dentry->d_lock);
	240	__managed_dentry_clear_automount(dentry);
	241	spin_unlock(&dentry->d_lock);
	242	}
	243
b5b80177 IK	244	static inline void __managed_dentry_set_transit(struct dentry *dentry)
	245	{
	246	dentry->d_flags \|= DCACHE_MANAGE_TRANSIT;
	247	}
	248
	249	static inline void managed_dentry_set_transit(struct dentry *dentry)
	250	{
	251	spin_lock(&dentry->d_lock);
	252	__managed_dentry_set_transit(dentry);
	253	spin_unlock(&dentry->d_lock);
	254	}
	255
	256	static inline void __managed_dentry_clear_transit(struct dentry *dentry)
	257	{
	258	dentry->d_flags &= ~DCACHE_MANAGE_TRANSIT;
	259	}
	260
	261	static inline void managed_dentry_clear_transit(struct dentry *dentry)
	262	{
	263	spin_lock(&dentry->d_lock);
	264	__managed_dentry_clear_transit(dentry);
	265	spin_unlock(&dentry->d_lock);
	266	}
	267
	268	static inline void __managed_dentry_set_managed(struct dentry *dentry)
	269	{
	270	dentry->d_flags \|= (DCACHE_NEED_AUTOMOUNT\|DCACHE_MANAGE_TRANSIT);
	271	}
	272
	273	static inline void managed_dentry_set_managed(struct dentry *dentry)
	274	{
	275	spin_lock(&dentry->d_lock);
	276	__managed_dentry_set_managed(dentry);
	277	spin_unlock(&dentry->d_lock);
	278	}
	279
	280	static inline void __managed_dentry_clear_managed(struct dentry *dentry)
	281	{
	282	dentry->d_flags &= ~(DCACHE_NEED_AUTOMOUNT\|DCACHE_MANAGE_TRANSIT);
	283	}
	284
	285	static inline void managed_dentry_clear_managed(struct dentry *dentry)
	286	{
	287	spin_lock(&dentry->d_lock);
	288	__managed_dentry_clear_managed(dentry);
	289	spin_unlock(&dentry->d_lock);
	290	}
	291
1da177e4 LT	292	/* Initializing function */
	293
	294	int autofs4_fill_super(struct super_block , void , int);
	295	struct autofs_info autofs4_init_ino(struct autofs_info , struct autofs_sb_info *sbi, mode_t mode);
	296
	297	/* Queue management functions */
	298
1da177e4 LT	299	int autofs4_wait(struct autofs_sb_info ,struct dentry , enum autofs_notify);
	300	int autofs4_wait_release(struct autofs_sb_info *,autofs_wqt_t,int);
	301	void autofs4_catatonic_mode(struct autofs_sb_info *);
	302
5c0a32fc IK	303	static inline u32 autofs4_get_dev(struct autofs_sb_info *sbi)
	304	{
	305	return new_encode_dev(sbi->sb->s_dev);
	306	}
	307
	308	static inline u64 autofs4_get_ino(struct autofs_sb_info *sbi)
	309	{
	310	return sbi->sb->s_root->d_inode->i_ino;
	311	}
	312
1da177e4 LT	313	static inline int simple_positive(struct dentry *dentry)
	314	{
	315	return dentry->d_inode && !d_unhashed(dentry);
	316	}
	317
2fd6b7f5 NP	318	static inline void __autofs4_add_expiring(struct dentry *dentry)
	319	{
	320	struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
	321	struct autofs_info *ino = autofs4_dentry_ino(dentry);
	322	if (ino) {
	323	if (list_empty(&ino->expiring))
	324	list_add(&ino->expiring, &sbi->expiring_list);
	325	}
	326	return;
	327	}
	328
c4cd70b3 IK	329	static inline void autofs4_add_expiring(struct dentry *dentry)
	330	{
	331	struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
	332	struct autofs_info *ino = autofs4_dentry_ino(dentry);
	333	if (ino) {
	334	spin_lock(&sbi->lookup_lock);
	335	if (list_empty(&ino->expiring))
	336	list_add(&ino->expiring, &sbi->expiring_list);
	337	spin_unlock(&sbi->lookup_lock);
	338	}
	339	return;
	340	}
	341
	342	static inline void autofs4_del_expiring(struct dentry *dentry)
	343	{
	344	struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
	345	struct autofs_info *ino = autofs4_dentry_ino(dentry);
	346	if (ino) {
	347	spin_lock(&sbi->lookup_lock);
	348	if (!list_empty(&ino->expiring))
	349	list_del_init(&ino->expiring);
	350	spin_unlock(&sbi->lookup_lock);
	351	}
	352	return;
	353	}
	354
f5b95ff0	355	void autofs4_dentry_release(struct dentry *);
6ce31523	356	extern void autofs4_kill_sb(struct super_block *);