1 files changed, 0 insertions, 260 deletions
diff --git a/drivers/staging/autofs/dirhash.c b/drivers/staging/autofs/dirhash.c
deleted file mode 100644
index a08bd7355035..000000000000
--- a/drivers/staging/autofs/dirhash.c
+++ /dev/null
@@ -1,260 +0,0 @@
-/* -*- linux-c -*- --------------------------------------------------------- *
- *
- * drivers/staging/autofs/dirhash.c
- *
- *  Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved
- *
- * 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 "autofs_i.h"
-
-/* Functions for maintenance of expiry queue */
-
-static void autofs_init_usage(struct autofs_dirhash *dh,
-			      struct autofs_dir_ent *ent)
-{
-	list_add_tail(&ent->exp, &dh->expiry_head);
-	ent->last_usage = jiffies;
-}
-
-static void autofs_delete_usage(struct autofs_dir_ent *ent)
-{
-	list_del(&ent->exp);
-}
-
-void autofs_update_usage(struct autofs_dirhash *dh,
-			 struct autofs_dir_ent *ent)
-{
-	autofs_delete_usage(ent);   /* Unlink from current position */
-	autofs_init_usage(dh, ent);  /* Relink at queue tail */
-}
-
-struct autofs_dir_ent *autofs_expire(struct super_block *sb,
-				     struct autofs_sb_info *sbi,
-				     struct vfsmount *mnt)
-{
-	struct autofs_dirhash *dh = &sbi->dirhash;
-	struct autofs_dir_ent *ent;
-	unsigned long timeout = sbi->exp_timeout;
-
-	while (1) {
-		struct path path;
-		int umount_ok;
-
-		if (list_empty(&dh->expiry_head) || sbi->catatonic)
-			return NULL;	/* No entries */
-		/* We keep the list sorted by last_usage and want old stuff */
-		ent = list_entry(dh->expiry_head.next,
-						struct autofs_dir_ent, exp);
-		if (jiffies - ent->last_usage < timeout)
-			break;
-		/* Move to end of list in case expiry isn't desirable */
-		autofs_update_usage(dh, ent);
-
-		/* Check to see that entry is expirable */
-		if (ent->ino < AUTOFS_FIRST_DIR_INO)
-			return ent; /* Symlinks are always expirable */
-
-		/* Get the dentry for the autofs subdirectory */
-		path.dentry = ent->dentry;
-
-		if (!path.dentry) {
-			/* Should only happen in catatonic mode */
-			printk(KERN_DEBUG "autofs: dentry == NULL but inode \
-				range is directory, entry %s\n", ent->name);
-			autofs_delete_usage(ent);
-			continue;
-		}
-
-		if (!path.dentry->d_inode) {
-			dput(path.dentry);
-			printk(KERN_DEBUG "autofs: negative dentry on expiry queue: %s\n",
-			       ent->name);
-			autofs_delete_usage(ent);
-			continue;
-		}
-
-		/* Make sure entry is mounted and unused; note that dentry will
-		   point to the mounted-on-top root. */
-		if (!S_ISDIR(path.dentry->d_inode->i_mode) ||
-		    !d_mountpoint(path.dentry)) {
-			DPRINTK(("autofs: not expirable \
-				(not a mounted directory): %s\n", ent->name));
-			continue;
-		}
-		path.mnt = mnt;
-		path_get(&path);
-		if (!follow_down_one(&path)) {
-			path_put(&path);
-			DPRINTK(("autofs: not expirable\
-			(not a mounted directory): %s\n", ent->name));
-			continue;
-		}
-		follow_down(&path, false);  // TODO: need to check error
-		umount_ok = may_umount(path.mnt);
-		path_put(&path);
-
-		if (umount_ok) {
-			DPRINTK(("autofs: signaling expire on %s\n",
-								ent->name));
-			return ent; /* Expirable! */
-		}
-
-		DPRINTK(("autofs: didn't expire due to may_umount: %s\n",
-								ent->name));
-	}
-	return NULL;		/* No expirable entries */
-}
-
-void autofs_initialize_hash(struct autofs_dirhash *dh)
-{
-	memset(&dh->h, 0, AUTOFS_HASH_SIZE*sizeof(struct autofs_dir_ent *));
-	INIT_LIST_HEAD(&dh->expiry_head);
-}
-
-struct autofs_dir_ent *autofs_hash_lookup(const struct autofs_dirhash *dh,
-						struct qstr *name)
-{
-	struct autofs_dir_ent *dhn;
-
-	DPRINTK(("autofs_hash_lookup: hash = 0x%08x, name = ", name->hash));
-	autofs_say(name->name, name->len);
-
-	for (dhn = dh->h[(unsigned) name->hash % AUTOFS_HASH_SIZE];
-		dhn;
-		dhn = dhn->next) {
-		if (name->hash == dhn->hash &&
-		     name->len == dhn->len &&
-		     !memcmp(name->name, dhn->name, name->len))
-			break;
-	}
-
-	return dhn;
-}
-
-void autofs_hash_insert(struct autofs_dirhash *dh, struct autofs_dir_ent *ent)
-{
-	struct autofs_dir_ent **dhnp;
-
-	DPRINTK(("autofs_hash_insert: hash = 0x%08x, name = ", ent->hash));
-	autofs_say(ent->name, ent->len);
-
-	autofs_init_usage(dh, ent);
-	if (ent->dentry)
-		dget(ent->dentry);
-
-	dhnp = &dh->h[(unsigned) ent->hash % AUTOFS_HASH_SIZE];
-	ent->next = *dhnp;
-	ent->back = dhnp;
-	*dhnp = ent;
-	if (ent->next)
-		ent->next->back = &(ent->next);
-}
-
-void autofs_hash_delete(struct autofs_dir_ent *ent)
-{
-	*(ent->back) = ent->next;
-	if (ent->next)
-		ent->next->back = ent->back;
-
-	autofs_delete_usage(ent);
-
-	if (ent->dentry)
-		dput(ent->dentry);
-	kfree(ent->name);
-	kfree(ent);
-}
-
-/*
- * Used by readdir().  We must validate "ptr", so we can't simply make it
- * a pointer.  Values below 0xffff are reserved; calling with any value
- * <= 0x10000 will return the first entry found.
- *
- * "last" can be NULL or the value returned by the last search *if* we
- * want the next sequential entry.
- */
-struct autofs_dir_ent *autofs_hash_enum(const struct autofs_dirhash *dh,
-					off_t *ptr, struct autofs_dir_ent *last)
-{
-	int bucket, ecount, i;
-	struct autofs_dir_ent *ent;
-
-	bucket = (*ptr >> 16) - 1;
-	ecount = *ptr & 0xffff;
-
-	if (bucket < 0)
-		bucket = ecount = 0;
-
-	DPRINTK(("autofs_hash_enum: bucket %d, entry %d\n", bucket, ecount));
-
-	ent = last ? last->next : NULL;
-
-	if (ent) {
-		ecount++;
-	} else {
-		while  (bucket < AUTOFS_HASH_SIZE) {
-			ent = dh->h[bucket];
-			for (i = ecount ; ent && i ; i--)
-				ent = ent->next;
-
-			if (ent) {
-				ecount++; /* Point to *next* entry */
-				break;
-			}
-
-			bucket++; ecount = 0;
-		}
-	}
-
-#ifdef DEBUG
-	if (!ent)
-		printk(KERN_DEBUG "autofs_hash_enum: nothing found\n");
-	else {
-		printk(KERN_DEBUG "autofs_hash_enum: found hash %08x, name",
-								ent->hash);
-		autofs_say(ent->name, ent->len);
-	}
-#endif
-
-	*ptr = ((bucket+1) << 16) + ecount;
-	return ent;
-}
-
-/* Iterate over all the ents, and remove all dentry pointers.  Used on
-   entering catatonic mode, in order to make the filesystem unmountable. */
-void autofs_hash_dputall(struct autofs_dirhash *dh)
-{
-	int i;
-	struct autofs_dir_ent *ent;
-
-	for (i = 0 ; i < AUTOFS_HASH_SIZE ; i++) {
-		for (ent = dh->h[i] ; ent ; ent = ent->next) {
-			if (ent->dentry) {
-				dput(ent->dentry);
-				ent->dentry = NULL;
-			}
-		}
-	}
-}
-
-/* Delete everything.  This is used on filesystem destruction, so we
-   make no attempt to keep the pointers valid */
-void autofs_hash_nuke(struct autofs_sb_info *sbi)
-{
-	int i;
-	struct autofs_dir_ent *ent, *nent;
-
-	for (i = 0 ; i < AUTOFS_HASH_SIZE ; i++) {
-		for (ent = sbi->dirhash.h[i] ; ent ; ent = nent) {
-			nent = ent->next;
-			if (ent->dentry)
-				dput(ent->dentry);
-			kfree(ent->name);
-			kfree(ent);
-		}
-	}
-}