autofs4: always use lookup for lookup (213614d5) · Commits · 戴 / test

fs/autofs4/autofs_i.h

+7 −0

Original line number	Diff line number	Diff line
		@@ -60,6 +60,11 @@ do { \
		current->pid, __func__, ##args); \
		} while (0)

		struct rehash_entry {
		struct task_struct *task;
		struct list_head list;
		};

		/* 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
		@@ -76,6 +81,7 @@ struct autofs_info {

		struct list_head active;
		int active_count;
		struct list_head rehash_list;

		struct list_head expiring;

		@@ -98,6 +104,7 @@ struct autofs_info {
		#define AUTOFS_INF_EXPIRING (1<<0) /* dentry is in the process of expiring */
		#define AUTOFS_INF_MOUNTPOINT (1<<1) /* mountpoint status for direct expire */
		#define AUTOFS_INF_PENDING (1<<2) /* dentry pending mount */
		#define AUTOFS_INF_REHASH (1<<3) /* dentry in transit to ->lookup() */

		struct autofs_wait_queue {
		wait_queue_head_t queue;

fs/autofs4/expire.c

+5 −1

Original line number	Diff line number	Diff line
		@@ -279,6 +279,7 @@ struct dentry autofs4_expire_direct(struct super_block sb,
		root->d_mounted--;
		}
		ino->flags \|= AUTOFS_INF_EXPIRING;
		autofs4_add_expiring(root);
		init_completion(&ino->expire_complete);
		spin_unlock(&sbi->fs_lock);
		return root;
		@@ -406,6 +407,7 @@ found:
		expired, (int)expired->d_name.len, expired->d_name.name);
		ino = autofs4_dentry_ino(expired);
		ino->flags \|= AUTOFS_INF_EXPIRING;
		autofs4_add_expiring(expired);
		init_completion(&ino->expire_complete);
		spin_unlock(&sbi->fs_lock);
		spin_lock(&dcache_lock);
		@@ -433,7 +435,7 @@ int autofs4_expire_wait(struct dentry *dentry)

		DPRINTK("expire done status=%d", status);

		if (d_unhashed(dentry))
		if (d_unhashed(dentry) && IS_DEADDIR(dentry->d_inode))
		return -EAGAIN;

		return status;
		@@ -473,6 +475,7 @@ int autofs4_expire_run(struct super_block *sb,
		spin_lock(&sbi->fs_lock);
		ino = autofs4_dentry_ino(dentry);
		ino->flags &= ~AUTOFS_INF_EXPIRING;
		autofs4_del_expiring(dentry);
		complete_all(&ino->expire_complete);
		spin_unlock(&sbi->fs_lock);

		@@ -503,6 +506,7 @@ int autofs4_do_expire_multi(struct super_block sb, struct vfsmount mnt,
		ino->flags &= ~AUTOFS_INF_MOUNTPOINT;
		}
		ino->flags &= ~AUTOFS_INF_EXPIRING;
		autofs4_del_expiring(dentry);
		complete_all(&ino->expire_complete);
		spin_unlock(&sbi->fs_lock);
		dput(dentry);

fs/autofs4/inode.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -49,6 +49,7 @@ struct autofs_info autofs4_init_ino(struct autofs_info ino,
		ino->dentry = NULL;
		ino->size = 0;
		INIT_LIST_HEAD(&ino->active);
		INIT_LIST_HEAD(&ino->rehash_list);
		ino->active_count = 0;
		INIT_LIST_HEAD(&ino->expiring);
		atomic_set(&ino->count, 0);

fs/autofs4/root.c

+317 −157

Original line number	Diff line number	Diff line
		@@ -104,6 +104,99 @@ static void autofs4_del_active(struct dentry *dentry)
		return;
		}

		static void autofs4_add_rehash_entry(struct autofs_info *ino,
		struct rehash_entry *entry)
		{
		entry->task = current;
		INIT_LIST_HEAD(&entry->list);
		list_add(&entry->list, &ino->rehash_list);
		return;
		}

		static void autofs4_remove_rehash_entry(struct autofs_info *ino)
		{
		struct list_head *head = &ino->rehash_list;
		struct rehash_entry *entry;
		list_for_each_entry(entry, head, list) {
		if (entry->task == current) {
		list_del(&entry->list);
		kfree(entry);
		break;
		}
		}
		return;
		}

		static void autofs4_remove_rehash_entrys(struct autofs_info *ino)
		{
		struct autofs_sb_info *sbi = ino->sbi;
		struct rehash_entry entry, next;
		struct list_head *head;

		spin_lock(&sbi->fs_lock);
		spin_lock(&sbi->lookup_lock);
		if (!(ino->flags & AUTOFS_INF_REHASH)) {
		spin_unlock(&sbi->lookup_lock);
		spin_unlock(&sbi->fs_lock);
		return;
		}
		ino->flags &= ~AUTOFS_INF_REHASH;
		head = &ino->rehash_list;
		list_for_each_entry_safe(entry, next, head, list) {
		list_del(&entry->list);
		kfree(entry);
		}
		spin_unlock(&sbi->lookup_lock);
		spin_unlock(&sbi->fs_lock);
		dput(ino->dentry);

		return;
		}

		static void autofs4_revalidate_drop(struct dentry *dentry,
		struct rehash_entry *entry)
		{
		struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
		struct autofs_info *ino = autofs4_dentry_ino(dentry);
		/*
		* Add to the active list so we can pick this up in
		* ->lookup(). Also add an entry to a rehash list so
		* we know when there are no dentrys in flight so we
		* know when we can rehash the dentry.
		*/
		spin_lock(&sbi->lookup_lock);
		if (list_empty(&ino->active))
		list_add(&ino->active, &sbi->active_list);
		autofs4_add_rehash_entry(ino, entry);
		spin_unlock(&sbi->lookup_lock);
		if (!(ino->flags & AUTOFS_INF_REHASH)) {
		ino->flags \|= AUTOFS_INF_REHASH;
		dget(dentry);
		spin_lock(&dentry->d_lock);
		__d_drop(dentry);
		spin_unlock(&dentry->d_lock);
		}
		return;
		}

		static void autofs4_revalidate_rehash(struct dentry *dentry)
		{
		struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
		struct autofs_info *ino = autofs4_dentry_ino(dentry);
		if (ino->flags & AUTOFS_INF_REHASH) {
		spin_lock(&sbi->lookup_lock);
		autofs4_remove_rehash_entry(ino);
		if (list_empty(&ino->rehash_list)) {
		spin_unlock(&sbi->lookup_lock);
		ino->flags &= ~AUTOFS_INF_REHASH;
		d_rehash(dentry);
		dput(ino->dentry);
		} else
		spin_unlock(&sbi->lookup_lock);
		}
		return;
		}

		static unsigned int autofs4_need_mount(unsigned int flags)
		{
		unsigned int res = 0;
		@@ -143,7 +236,7 @@ out:
		return dcache_dir_open(inode, file);
		}

		static int try_to_fill_dentry(struct dentry *dentry, int flags)
		static int try_to_fill_dentry(struct dentry *dentry)
		{
		struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
		struct autofs_info *ino = autofs4_dentry_ino(dentry);
		@@ -156,7 +249,6 @@ static int try_to_fill_dentry(struct dentry *dentry, int flags)
		* Wait for a pending mount, triggering one if there
		* isn't one already
		*/
		if (dentry->d_inode == NULL) {
		DPRINTK("waiting for mount name=%.*s",
		dentry->d_name.len, dentry->d_name.name);

		@@ -164,47 +256,10 @@ static int try_to_fill_dentry(struct dentry *dentry, int flags)

		DPRINTK("mount done status=%d", status);

		/* Turn this into a real negative dentry? */
		if (status == -ENOENT) {
		spin_lock(&sbi->fs_lock);
		ino->flags &= ~AUTOFS_INF_PENDING;
		spin_unlock(&sbi->fs_lock);
		return status;
		} else if (status) {
		/* Return a negative dentry, but leave it "pending" */
		return status;
		}
		/* Trigger mount for path component or follow link */
		} else if (ino->flags & AUTOFS_INF_PENDING \|\|
		autofs4_need_mount(flags) \|\|
		current->link_count) {
		DPRINTK("waiting for mount name=%.*s",
		dentry->d_name.len, dentry->d_name.name);

		spin_lock(&sbi->fs_lock);
		ino->flags \|= AUTOFS_INF_PENDING;
		spin_unlock(&sbi->fs_lock);
		status = autofs4_wait(sbi, dentry, NFY_MOUNT);

		DPRINTK("mount done status=%d", status);

		if (status) {
		spin_lock(&sbi->fs_lock);
		ino->flags &= ~AUTOFS_INF_PENDING;
		spin_unlock(&sbi->fs_lock);
		return status;
		}
		}

		/* Initialize expiry counter after successful mount */
		if (ino)
		/* Update expiry counter */
		ino->last_used = jiffies;

		spin_lock(&sbi->fs_lock);
		ino->flags &= ~AUTOFS_INF_PENDING;
		spin_unlock(&sbi->fs_lock);

		return 0;
		return status;
		}

		/* For autofs direct mounts the follow link triggers the mount */
		@@ -258,10 +313,16 @@ static void autofs4_follow_link(struct dentry dentry, struct nameidata *nd)
		*/
		if (ino->flags & AUTOFS_INF_PENDING \|\|
		(!d_mountpoint(dentry) && list_empty(&dentry->d_subdirs))) {
		ino->flags \|= AUTOFS_INF_PENDING;
		spin_unlock(&dcache_lock);
		spin_unlock(&sbi->fs_lock);

		status = try_to_fill_dentry(dentry, 0);
		status = try_to_fill_dentry(dentry);

		spin_lock(&sbi->fs_lock);
		ino->flags &= ~AUTOFS_INF_PENDING;
		spin_unlock(&sbi->fs_lock);

		if (status)
		goto out_error;

		@@ -300,18 +361,47 @@ static int autofs4_revalidate(struct dentry dentry, struct nameidata nd)
		{
		struct inode *dir = dentry->d_parent->d_inode;
		struct autofs_sb_info *sbi = autofs4_sbi(dir->i_sb);
		int oz_mode = autofs4_oz_mode(sbi);
		struct autofs_info *ino = autofs4_dentry_ino(dentry);
		struct rehash_entry *entry;
		int flags = nd ? nd->flags : 0;
		int status = 1;
		unsigned int mutex_aquired;

		DPRINTK("name = %.*s oz_mode = %d",
		dentry->d_name.len, dentry->d_name.name, oz_mode);

		/* Daemon never causes a mount to trigger */
		if (autofs4_oz_mode(sbi))
		return 1;

		entry = kmalloc(sizeof(struct rehash_entry), GFP_KERNEL);
		if (!entry)
		return -ENOMEM;

		mutex_aquired = mutex_trylock(&dir->i_mutex);

		/* Pending dentry */
		spin_lock(&sbi->fs_lock);
		spin_lock(&dcache_lock);
		/* Pending dentry */
		if (autofs4_ispending(dentry)) {
		/* The daemon never causes a mount to trigger */
		spin_unlock(&sbi->fs_lock);
		int status;

		if (oz_mode)
		return 1;
		/*
		* We can only unhash and send this to ->lookup() if
		* the directory mutex is held over d_revalidate() and
		* ->lookup(). This prevents the VFS from incorrectly
		* seeing the dentry as non-existent.
		*/
		ino->flags \|= AUTOFS_INF_PENDING;
		if (!mutex_aquired) {
		autofs4_revalidate_drop(dentry, entry);
		spin_unlock(&dcache_lock);
		spin_unlock(&sbi->fs_lock);
		return 0;
		}
		spin_unlock(&dcache_lock);
		spin_unlock(&sbi->fs_lock);
		mutex_unlock(&dir->i_mutex);
		kfree(entry);

		/*
		* If the directory has gone away due to an expire
		@@ -325,45 +415,82 @@ static int autofs4_revalidate(struct dentry dentry, struct nameidata nd)
		* A zero status is success otherwise we have a
		* negative error code.
		*/
		status = try_to_fill_dentry(dentry, flags);
		status = try_to_fill_dentry(dentry);

		spin_lock(&sbi->fs_lock);
		ino->flags &= ~AUTOFS_INF_PENDING;
		spin_unlock(&sbi->fs_lock);

		if (status == 0)
		return 1;

		return status;
		}
		spin_unlock(&sbi->fs_lock);

		/* Negative dentry.. invalidate if "old" */
		if (dentry->d_inode == NULL)
		return 0;

		/* Check for a non-mountpoint directory with no contents */
		spin_lock(&dcache_lock);
		if (S_ISDIR(dentry->d_inode->i_mode) &&
		!d_mountpoint(dentry) && list_empty(&dentry->d_subdirs)) {
		DPRINTK("dentry=%p %.*s, emptydir",
		dentry, dentry->d_name.len, dentry->d_name.name);
		spin_unlock(&dcache_lock);

		/* The daemon never causes a mount to trigger */
		if (oz_mode)
		return 1;
		if (autofs4_need_mount(flags) \|\| current->link_count) {
		int status;

		/*
		* We can only unhash and send this to ->lookup() if
		* the directory mutex is held over d_revalidate() and
		* ->lookup(). This prevents the VFS from incorrectly
		* seeing the dentry as non-existent.
		*/
		ino->flags \|= AUTOFS_INF_PENDING;
		if (!mutex_aquired) {
		autofs4_revalidate_drop(dentry, entry);
		spin_unlock(&dcache_lock);
		spin_unlock(&sbi->fs_lock);
		return 0;
		}
		spin_unlock(&dcache_lock);
		spin_unlock(&sbi->fs_lock);
		mutex_unlock(&dir->i_mutex);
		kfree(entry);

		/*
		* A zero status is success otherwise we have a
		* negative error code.
		*/
		status = try_to_fill_dentry(dentry, flags);
		status = try_to_fill_dentry(dentry);

		spin_lock(&sbi->fs_lock);
		ino->flags &= ~AUTOFS_INF_PENDING;
		spin_unlock(&sbi->fs_lock);

		if (status == 0)
		return 1;

		return status;
		}
		}
		spin_unlock(&dcache_lock);
		spin_unlock(&sbi->fs_lock);

		if (mutex_aquired)
		mutex_unlock(&dir->i_mutex);

		kfree(entry);

		return 1;
		}

		static void autofs4_free_rehash_entrys(struct autofs_info *inf)
		{
		struct list_head *head = &inf->rehash_list;
		struct rehash_entry entry, next;
		list_for_each_entry_safe(entry, next, head, list) {
		list_del(&entry->list);
		kfree(entry);
		}
		}

		void autofs4_dentry_release(struct dentry *de)
		{
		struct autofs_info *inf;
		@@ -382,6 +509,8 @@ void autofs4_dentry_release(struct dentry *de)
		list_del(&inf->active);
		if (!list_empty(&inf->expiring))
		list_del(&inf->expiring);
		if (!list_empty(&inf->rehash_list))
		autofs4_free_rehash_entrys(inf);
		spin_unlock(&sbi->lookup_lock);
		}

		@@ -414,6 +543,7 @@ static struct dentry autofs4_lookup_active(struct dentry dentry)
		const unsigned char *str = name->name;
		struct list_head p, head;

		restart:
		spin_lock(&dcache_lock);
		spin_lock(&sbi->lookup_lock);
		head = &sbi->active_list;
		@@ -431,6 +561,19 @@ static struct dentry autofs4_lookup_active(struct dentry dentry)
		if (atomic_read(&active->d_count) == 0)
		goto next;

		if (active->d_inode && IS_DEADDIR(active->d_inode)) {
		if (!list_empty(&ino->rehash_list)) {
		dget(active);
		spin_unlock(&active->d_lock);
		spin_unlock(&sbi->lookup_lock);
		spin_unlock(&dcache_lock);
		autofs4_remove_rehash_entrys(ino);
		dput(active);
		goto restart;
		}
		goto next;
		}

		qstr = &active->d_name;

		if (active->d_name.hash != hash)
		@@ -443,13 +586,11 @@ static struct dentry autofs4_lookup_active(struct dentry dentry)
		if (memcmp(qstr->name, str, len))
		goto next;

		if (d_unhashed(active)) {
		dget(active);
		spin_unlock(&active->d_lock);
		spin_unlock(&sbi->lookup_lock);
		spin_unlock(&dcache_lock);
		return active;
		}
		next:
		spin_unlock(&active->d_lock);
		}
		@@ -498,13 +639,11 @@ static struct dentry autofs4_lookup_expiring(struct dentry dentry)
		if (memcmp(qstr->name, str, len))
		goto next;

		if (d_unhashed(expiring)) {
		dget(expiring);
		spin_unlock(&expiring->d_lock);
		spin_unlock(&sbi->lookup_lock);
		spin_unlock(&dcache_lock);
		return expiring;
		}
		next:
		spin_unlock(&expiring->d_lock);
		}
		@@ -514,32 +653,11 @@ next:
		return NULL;
		}

		/* Lookups in the root directory */
		static struct dentry autofs4_lookup(struct inode dir, struct dentry dentry, struct nameidata nd)
		static struct autofs_info init_new_dentry(struct autofs_sb_info sbi,
		struct dentry *dentry, int oz_mode)
		{
		struct autofs_sb_info *sbi;
		struct autofs_info *ino;
		struct dentry expiring, active;
		int oz_mode;

		DPRINTK("name = %.*s",
		dentry->d_name.len, dentry->d_name.name);

		/* File name too long to exist */
		if (dentry->d_name.len > NAME_MAX)
		return ERR_PTR(-ENAMETOOLONG);

		sbi = autofs4_sbi(dir->i_sb);
		oz_mode = autofs4_oz_mode(sbi);

		DPRINTK("pid = %u, pgrp = %u, catatonic = %d, oz_mode = %d",
		current->pid, task_pgrp_nr(current), sbi->catatonic, oz_mode);

		active = autofs4_lookup_active(dentry);
		if (active) {
		dentry = active;
		ino = autofs4_dentry_ino(dentry);
		} else {
		/*
		* Mark the dentry incomplete but don't hash it. We do this
		* to serialize our inode creation operations (symlink and
		@@ -565,14 +683,60 @@ static struct dentry autofs4_lookup(struct inode dir, struct dentry *dentry, s
		dentry->d_fsdata = ino;
		ino->dentry = dentry;

		autofs4_add_active(dentry);
		/*
		* Only set the mount pending flag for new dentrys not created
		* by the daemon.
		*/
		if (!oz_mode)
		ino->flags \|= AUTOFS_INF_PENDING;

		d_instantiate(dentry, NULL);

		return ino;
		}

		/* Lookups in the root directory */
		static struct dentry autofs4_lookup(struct inode dir, struct dentry dentry, struct nameidata nd)
		{
		struct autofs_sb_info *sbi;
		struct autofs_info *ino;
		struct dentry expiring, active;
		int oz_mode;
		int status = 0;

		DPRINTK("name = %.*s",
		dentry->d_name.len, dentry->d_name.name);

		/* File name too long to exist */
		if (dentry->d_name.len > NAME_MAX)
		return ERR_PTR(-ENAMETOOLONG);

		sbi = autofs4_sbi(dir->i_sb);
		oz_mode = autofs4_oz_mode(sbi);

		DPRINTK("pid = %u, pgrp = %u, catatonic = %d, oz_mode = %d",
		current->pid, task_pgrp_nr(current), sbi->catatonic, oz_mode);

		spin_lock(&sbi->fs_lock);
		active = autofs4_lookup_active(dentry);
		if (active) {
		dentry = active;
		ino = autofs4_dentry_ino(dentry);
		/* If this came from revalidate, rehash it */
		autofs4_revalidate_rehash(dentry);
		spin_unlock(&sbi->fs_lock);
		} else {
		spin_unlock(&sbi->fs_lock);
		ino = init_new_dentry(sbi, dentry, oz_mode);
		if (IS_ERR(ino))
		return (struct dentry *) ino;
		}

		autofs4_add_active(dentry);

		if (!oz_mode) {
		mutex_unlock(&dir->i_mutex);
		expiring = autofs4_lookup_expiring(dentry);
		mutex_unlock(&dir->i_mutex);
		if (expiring) {
		/*
		* If we are racing with expire the request might not
		@@ -580,23 +744,22 @@ static struct dentry autofs4_lookup(struct inode dir, struct dentry *dentry, s
		* so it must have been successful, so just wait for it.
		*/
		autofs4_expire_wait(expiring);
		autofs4_del_expiring(expiring);
		dput(expiring);
		}

		status = try_to_fill_dentry(dentry);
		mutex_lock(&dir->i_mutex);
		spin_lock(&sbi->fs_lock);
		ino->flags \|= AUTOFS_INF_PENDING;
		ino->flags &= ~AUTOFS_INF_PENDING;
		spin_unlock(&sbi->fs_lock);
		if (dentry->d_op && dentry->d_op->d_revalidate)
		(dentry->d_op->d_revalidate)(dentry, nd);
		mutex_lock(&dir->i_mutex);
		}

		autofs4_del_active(dentry);

		/*
		* If we are still pending, check if we had to handle
		* If we had a mount fail, check if we had to handle
		* a signal. If so we can force a restart..
		*/
		if (ino->flags & AUTOFS_INF_PENDING) {
		if (status) {
		/* See if we were interrupted */
		if (signal_pending(current)) {
		sigset_t *sigset = &current->pending.signal;
		@@ -608,42 +771,45 @@ static struct dentry autofs4_lookup(struct inode dir, struct dentry *dentry, s
		return ERR_PTR(-ERESTARTNOINTR);
		}
		}
		if (!oz_mode) {
		spin_lock(&sbi->fs_lock);
		ino->flags &= ~AUTOFS_INF_PENDING;
		spin_unlock(&sbi->fs_lock);
		}
		}

		/*
		* If this dentry is unhashed, then we shouldn't honour this
		* lookup. Returning ENOENT here doesn't do the right thing
		* for all system calls, but it should be OK for the operations
		* we permit from an autofs.
		* User space can (and has done in the past) remove and re-create
		* this directory during the callback. This can leave us with an
		* unhashed dentry, but a successful mount! So we need to
		* perform another cached lookup in case the dentry now exists.
		*/
		if (!oz_mode && d_unhashed(dentry)) {
		if (!oz_mode && !have_submounts(dentry)) {
		struct dentry *new;
		new = d_lookup(dentry->d_parent, &dentry->d_name);
		if (new) {
		if (active)
		dput(active);
		return new;
		} else {
		if (!status)
		status = -ENOENT;
		}
		}

		/*
		* A user space application can (and has done in the past)
		* remove and re-create this directory during the callback.
		* This can leave us with an unhashed dentry, but a
		* successful mount! So we need to perform another
		* cached lookup in case the dentry now exists.
		* If we had a mount failure, return status to user space.
		* If the mount succeeded and we used a dentry from the active queue
		* return it.
		*/
		struct dentry *parent = dentry->d_parent;
		struct dentry *new = d_lookup(parent, &dentry->d_name);
		if (new != NULL)
		dentry = new;
		else
		dentry = ERR_PTR(-ENOENT);

		if (status) {
		dentry = ERR_PTR(status);
		if (active)
		dput(active);

		return dentry;
		}

		} else {
		/*
		* Valid successful mount, return active dentry or NULL
		* for a new dentry.
		*/
		if (active)
		return active;
		}

		return NULL;
		}
		@@ -668,8 +834,6 @@ static int autofs4_dir_symlink(struct inode *dir,
		if (!ino)
		return -ENOMEM;

		autofs4_del_active(dentry);

		ino->size = strlen(symname);
		cp = kmalloc(ino->size + 1, GFP_KERNEL);
		if (!cp) {
		@@ -746,7 +910,6 @@ static int autofs4_dir_unlink(struct inode dir, struct dentry dentry)
		dir->i_mtime = CURRENT_TIME;

		spin_lock(&dcache_lock);
		autofs4_add_expiring(dentry);
		spin_lock(&dentry->d_lock);
		__d_drop(dentry);
		spin_unlock(&dentry->d_lock);
		@@ -772,7 +935,6 @@ static int autofs4_dir_rmdir(struct inode dir, struct dentry dentry)
		spin_unlock(&dcache_lock);
		return -ENOTEMPTY;
		}
		autofs4_add_expiring(dentry);
		spin_lock(&dentry->d_lock);
		__d_drop(dentry);
		spin_unlock(&dentry->d_lock);
		@@ -810,8 +972,6 @@ static int autofs4_dir_mkdir(struct inode dir, struct dentry dentry, int mode)
		if (!ino)
		return -ENOMEM;

		autofs4_del_active(dentry);

		inode = autofs4_get_inode(dir->i_sb, ino);
		if (!inode) {
		if (!dentry->d_fsdata)

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