1 files changed, 0 insertions, 645 deletions

diff --git a/drivers/staging/autofs/root.c b/drivers/staging/autofs/root.c
deleted file mode 100644
index 0fdec4befd8..00000000000
--- a/drivers/staging/autofs/root.c
+++ /dev/null
@@ -1,645 +0,0 @@
-/* -*- linux-c -*- --------------------------------------------------------- *
- *
- * drivers/staging/autofs/root.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 <linux/capability.h>
-#include <linux/errno.h>
-#include <linux/stat.h>
-#include <linux/slab.h>
-#include <linux/param.h>
-#include <linux/time.h>
-#include <linux/compat.h>
-#include <linux/smp_lock.h>
-#include "autofs_i.h"
-
-static int autofs_root_readdir(struct file *,void *,filldir_t);
-static struct dentry *autofs_root_lookup(struct inode *,struct dentry *, struct nameidata *);
-static int autofs_root_symlink(struct inode *,struct dentry *,const char *);
-static int autofs_root_unlink(struct inode *,struct dentry *);
-static int autofs_root_rmdir(struct inode *,struct dentry *);
-static int autofs_root_mkdir(struct inode *,struct dentry *,int);
-static long autofs_root_ioctl(struct file *,unsigned int,unsigned long);
-#ifdef CONFIG_COMPAT
-static long autofs_root_compat_ioctl(struct file *,unsigned int,unsigned long);
-#endif
-
-const struct file_operations autofs_root_operations = {
-	.llseek		= generic_file_llseek,
-	.read		= generic_read_dir,
-	.readdir	= autofs_root_readdir,
-	.unlocked_ioctl	= autofs_root_ioctl,
-#ifdef CONFIG_COMPAT
-	.compat_ioctl	= autofs_root_compat_ioctl,
-#endif
-};
-
-const struct inode_operations autofs_root_inode_operations = {
-        .lookup		= autofs_root_lookup,
-        .unlink		= autofs_root_unlink,
-        .symlink	= autofs_root_symlink,
-        .mkdir		= autofs_root_mkdir,
-        .rmdir		= autofs_root_rmdir,
-};
-
-static int autofs_root_readdir(struct file *filp, void *dirent, filldir_t filldir)
-{
-	struct autofs_dir_ent *ent = NULL;
-	struct autofs_dirhash *dirhash;
-	struct autofs_sb_info *sbi;
-	struct inode * inode = filp->f_path.dentry->d_inode;
-	off_t onr, nr;
-
-	lock_kernel();
-
-	sbi = autofs_sbi(inode->i_sb);
-	dirhash = &sbi->dirhash;
-	nr = filp->f_pos;
-
-	switch(nr)
-	{
-	case 0:
-		if (filldir(dirent, ".", 1, nr, inode->i_ino, DT_DIR) < 0)
-			goto out;
-		filp->f_pos = ++nr;
-		/* fall through */
-	case 1:
-		if (filldir(dirent, "..", 2, nr, inode->i_ino, DT_DIR) < 0)
-			goto out;
-		filp->f_pos = ++nr;
-		/* fall through */
-	default:
-		while (onr = nr, ent = autofs_hash_enum(dirhash,&nr,ent)) {
-			if (!ent->dentry || d_mountpoint(ent->dentry)) {
-				if (filldir(dirent,ent->name,ent->len,onr,ent->ino,DT_UNKNOWN) < 0)
-					goto out;
-				filp->f_pos = nr;
-			}
-		}
-		break;
-	}
-
-out:
-	unlock_kernel();
-	return 0;
-}
-
-static int try_to_fill_dentry(struct dentry *dentry, struct super_block *sb, struct autofs_sb_info *sbi)
-{
-	struct inode * inode;
-	struct autofs_dir_ent *ent;
-	int status = 0;
-
-	if (!(ent = autofs_hash_lookup(&sbi->dirhash, &dentry->d_name))) {
-		do {
-			if (status && dentry->d_inode) {
-				if (status != -ENOENT)
-					printk("autofs warning: lookup failure on positive dentry, status = %d, name = %s\n", status, dentry->d_name.name);
-				return 0; /* Try to get the kernel to invalidate this dentry */
-			}
-
-			/* Turn this into a real negative dentry? */
-			if (status == -ENOENT) {
-				dentry->d_time = jiffies + AUTOFS_NEGATIVE_TIMEOUT;
-				dentry->d_flags &= ~DCACHE_AUTOFS_PENDING;
-				return 1;
-			} else if (status) {
-				/* Return a negative dentry, but leave it "pending" */
-				return 1;
-			}
-			status = autofs_wait(sbi, &dentry->d_name);
-		} while (!(ent = autofs_hash_lookup(&sbi->dirhash, &dentry->d_name)));
-	}
-
-	/* Abuse this field as a pointer to the directory entry, used to
-	   find the expire list pointers */
-	dentry->d_time = (unsigned long) ent;
-	
-	if (!dentry->d_inode) {
-		inode = autofs_iget(sb, ent->ino);
-		if (IS_ERR(inode)) {
-			/* Failed, but leave pending for next time */
-			return 1;
-		}
-		dentry->d_inode = inode;
-	}
-
-	/* If this is a directory that isn't a mount point, bitch at the
-	   daemon and fix it in user space */
-	if (S_ISDIR(dentry->d_inode->i_mode) && !d_mountpoint(dentry)) {
-		return !autofs_wait(sbi, &dentry->d_name);
-	}
-
-	/* We don't update the usages for the autofs daemon itself, this
-	   is necessary for recursive autofs mounts */
-	if (!autofs_oz_mode(sbi)) {
-		autofs_update_usage(&sbi->dirhash,ent);
-	}
-
-	dentry->d_flags &= ~DCACHE_AUTOFS_PENDING;
-	return 1;
-}
-
-
-/*
- * Revalidate is called on every cache lookup.  Some of those
- * cache lookups may actually happen while the dentry is not
- * yet completely filled in, and revalidate has to delay such
- * lookups..
- */
-static int autofs_revalidate(struct dentry * dentry, struct nameidata *nd)
-{
-	struct inode * dir;
-	struct autofs_sb_info *sbi;
-	struct autofs_dir_ent *ent;
-	int res;
-
-	lock_kernel();
-	dir = dentry->d_parent->d_inode;
-	sbi = autofs_sbi(dir->i_sb);
-
-	/* Pending dentry */
-	if (dentry->d_flags & DCACHE_AUTOFS_PENDING) {
-		if (autofs_oz_mode(sbi))
-			res = 1;
-		else
-			res = try_to_fill_dentry(dentry, dir->i_sb, sbi);
-		unlock_kernel();
-		return res;
-	}
-
-	/* Negative dentry.. invalidate if "old" */
-	if (!dentry->d_inode) {
-		unlock_kernel();
-		return (dentry->d_time - jiffies <= AUTOFS_NEGATIVE_TIMEOUT);
-	}
-		
-	/* Check for a non-mountpoint directory */
-	if (S_ISDIR(dentry->d_inode->i_mode) && !d_mountpoint(dentry)) {
-		if (autofs_oz_mode(sbi))
-			res = 1;
-		else
-			res = try_to_fill_dentry(dentry, dir->i_sb, sbi);
-		unlock_kernel();
-		return res;
-	}
-
-	/* Update the usage list */
-	if (!autofs_oz_mode(sbi)) {
-		ent = (struct autofs_dir_ent *) dentry->d_time;
-		if (ent)
-			autofs_update_usage(&sbi->dirhash,ent);
-	}
-	unlock_kernel();
-	return 1;
-}
-
-static const struct dentry_operations autofs_dentry_operations = {
-	.d_revalidate	= autofs_revalidate,
-};
-
-static struct dentry *autofs_root_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
-{
-	struct autofs_sb_info *sbi;
-	int oz_mode;
-
-	DPRINTK(("autofs_root_lookup: name = "));
-	lock_kernel();
-	autofs_say(dentry->d_name.name,dentry->d_name.len);
-
-	if (dentry->d_name.len > NAME_MAX) {
-		unlock_kernel();
-		return ERR_PTR(-ENAMETOOLONG);/* File name too long to exist */
-	}
-
-	sbi = autofs_sbi(dir->i_sb);
-
-	oz_mode = autofs_oz_mode(sbi);
-	DPRINTK(("autofs_lookup: pid = %u, pgrp = %u, catatonic = %d, "
-				"oz_mode = %d\n", task_pid_nr(current),
-				task_pgrp_nr(current), sbi->catatonic,
-				oz_mode));
-
-	/*
-	 * Mark the dentry incomplete, but add it. This is needed so
-	 * that the VFS layer knows about the dentry, and we can count
-	 * on catching any lookups through the revalidate.
-	 *
-	 * Let all the hard work be done by the revalidate function that
-	 * needs to be able to do this anyway..
-	 *
-	 * We need to do this before we release the directory semaphore.
-	 */
-	dentry->d_op = &autofs_dentry_operations;
-	dentry->d_flags |= DCACHE_AUTOFS_PENDING;
-	d_add(dentry, NULL);
-
-	mutex_unlock(&dir->i_mutex);
-	autofs_revalidate(dentry, nd);
-	mutex_lock(&dir->i_mutex);
-
-	/*
-	 * If we are still pending, check if we had to handle
-	 * a signal. If so we can force a restart..
-	 */
-	if (dentry->d_flags & DCACHE_AUTOFS_PENDING) {
-		/* See if we were interrupted */
-		if (signal_pending(current)) {
-			sigset_t *sigset = &current->pending.signal;
-			if (sigismember (sigset, SIGKILL) ||
-			    sigismember (sigset, SIGQUIT) ||
-			    sigismember (sigset, SIGINT)) {
-				unlock_kernel();
-				return ERR_PTR(-ERESTARTNOINTR);
-			}
-		}
-	}
-	unlock_kernel();
-
-	/*
-	 * If this dentry is unhashed, then we shouldn't honour this
-	 * lookup even if the dentry is positive.  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.
-	 */
-	if (dentry->d_inode && d_unhashed(dentry))
-		return ERR_PTR(-ENOENT);
-
-	return NULL;
-}
-
-static int autofs_root_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
-{
-	struct autofs_sb_info *sbi = autofs_sbi(dir->i_sb);
-	struct autofs_dirhash *dh = &sbi->dirhash;
-	struct autofs_dir_ent *ent;
-	unsigned int n;
-	int slsize;
-	struct autofs_symlink *sl;
-	struct inode *inode;
-
-	DPRINTK(("autofs_root_symlink: %s <- ", symname));
-	autofs_say(dentry->d_name.name,dentry->d_name.len);
-
-	lock_kernel();
-	if (!autofs_oz_mode(sbi)) {
-		unlock_kernel();
-		return -EACCES;
-	}
-
-	if (autofs_hash_lookup(dh, &dentry->d_name)) {
-		unlock_kernel();
-		return -EEXIST;
-	}
-
-	n = find_first_zero_bit(sbi->symlink_bitmap,AUTOFS_MAX_SYMLINKS);
-	if (n >= AUTOFS_MAX_SYMLINKS) {
-		unlock_kernel();
-		return -ENOSPC;
-	}
-
-	set_bit(n,sbi->symlink_bitmap);
-	sl = &sbi->symlink[n];
-	sl->len = strlen(symname);
-	sl->data = kmalloc(slsize = sl->len+1, GFP_KERNEL);
-	if (!sl->data) {
-		clear_bit(n,sbi->symlink_bitmap);
-		unlock_kernel();
-		return -ENOSPC;
-	}
-
-	ent = kmalloc(sizeof(struct autofs_dir_ent), GFP_KERNEL);
-	if (!ent) {
-		kfree(sl->data);
-		clear_bit(n,sbi->symlink_bitmap);
-		unlock_kernel();
-		return -ENOSPC;
-	}
-
-	ent->name = kmalloc(dentry->d_name.len+1, GFP_KERNEL);
-	if (!ent->name) {
-		kfree(sl->data);
-		kfree(ent);
-		clear_bit(n,sbi->symlink_bitmap);
-		unlock_kernel();
-		return -ENOSPC;
-	}
-
-	memcpy(sl->data,symname,slsize);
-	sl->mtime = get_seconds();
-
-	ent->ino = AUTOFS_FIRST_SYMLINK + n;
-	ent->hash = dentry->d_name.hash;
-	memcpy(ent->name, dentry->d_name.name, 1+(ent->len = dentry->d_name.len));
-	ent->dentry = NULL;	/* We don't keep the dentry for symlinks */
-
-	autofs_hash_insert(dh,ent);
-
-	inode = autofs_iget(dir->i_sb, ent->ino);
-	if (IS_ERR(inode))
-		return PTR_ERR(inode);
-
-	d_instantiate(dentry, inode);
-	unlock_kernel();
-	return 0;
-}
-
-/*
- * NOTE!
- *
- * Normal filesystems would do a "d_delete()" to tell the VFS dcache
- * that the file no longer exists. However, doing that means that the
- * VFS layer can turn the dentry into a negative dentry, which we
- * obviously do not want (we're dropping the entry not because it
- * doesn't exist, but because it has timed out).
- *
- * Also see autofs_root_rmdir()..
- */
-static int autofs_root_unlink(struct inode *dir, struct dentry *dentry)
-{
-	struct autofs_sb_info *sbi = autofs_sbi(dir->i_sb);
-	struct autofs_dirhash *dh = &sbi->dirhash;
-	struct autofs_dir_ent *ent;
-	unsigned int n;
-
-	/* This allows root to remove symlinks */
-	lock_kernel();
-	if (!autofs_oz_mode(sbi) && !capable(CAP_SYS_ADMIN)) {
-		unlock_kernel();
-		return -EACCES;
-	}
-
-	ent = autofs_hash_lookup(dh, &dentry->d_name);
-	if (!ent) {
-		unlock_kernel();
-		return -ENOENT;
-	}
-
-	n = ent->ino - AUTOFS_FIRST_SYMLINK;
-	if (n >= AUTOFS_MAX_SYMLINKS) {
-		unlock_kernel();
-		return -EISDIR;	/* It's a directory, dummy */
-	}
-	if (!test_bit(n,sbi->symlink_bitmap)) {
-		unlock_kernel();
-		return -EINVAL;	/* Nonexistent symlink?  Shouldn't happen */
-	}
-	
-	dentry->d_time = (unsigned long)(struct autofs_dirhash *)NULL;
-	autofs_hash_delete(ent);
-	clear_bit(n,sbi->symlink_bitmap);
-	kfree(sbi->symlink[n].data);
-	d_drop(dentry);
-	
-	unlock_kernel();
-	return 0;
-}
-
-static int autofs_root_rmdir(struct inode *dir, struct dentry *dentry)
-{
-	struct autofs_sb_info *sbi = autofs_sbi(dir->i_sb);
-	struct autofs_dirhash *dh = &sbi->dirhash;
-	struct autofs_dir_ent *ent;
-
-	lock_kernel();
-	if (!autofs_oz_mode(sbi)) {
-		unlock_kernel();
-		return -EACCES;
-	}
-
-	ent = autofs_hash_lookup(dh, &dentry->d_name);
-	if (!ent) {
-		unlock_kernel();
-		return -ENOENT;
-	}
-
-	if ((unsigned int)ent->ino < AUTOFS_FIRST_DIR_INO) {
-		unlock_kernel();
-		return -ENOTDIR; /* Not a directory */
-	}
-
-	if (ent->dentry != dentry) {
-		printk("autofs_rmdir: odentry != dentry for entry %s\n", dentry->d_name.name);
-	}
-
-	dentry->d_time = (unsigned long)(struct autofs_dir_ent *)NULL;
-	autofs_hash_delete(ent);
-	drop_nlink(dir);
-	d_drop(dentry);
-	unlock_kernel();
-
-	return 0;
-}
-
-static int autofs_root_mkdir(struct inode *dir, struct dentry *dentry, int mode)
-{
-	struct autofs_sb_info *sbi = autofs_sbi(dir->i_sb);
-	struct autofs_dirhash *dh = &sbi->dirhash;
-	struct autofs_dir_ent *ent;
-	struct inode *inode;
-	ino_t ino;
-
-	lock_kernel();
-	if (!autofs_oz_mode(sbi)) {
-		unlock_kernel();
-		return -EACCES;
-	}
-
-	ent = autofs_hash_lookup(dh, &dentry->d_name);
-	if (ent) {
-		unlock_kernel();
-		return -EEXIST;
-	}
-
-	if (sbi->next_dir_ino < AUTOFS_FIRST_DIR_INO) {
-		printk("autofs: Out of inode numbers -- what the heck did you do??\n");
-		unlock_kernel();
-		return -ENOSPC;
-	}
-	ino = sbi->next_dir_ino++;
-
-	ent = kmalloc(sizeof(struct autofs_dir_ent), GFP_KERNEL);
-	if (!ent) {
-		unlock_kernel();
-		return -ENOSPC;
-	}
-
-	ent->name = kmalloc(dentry->d_name.len+1, GFP_KERNEL);
-	if (!ent->name) {
-		kfree(ent);
-		unlock_kernel();
-		return -ENOSPC;
-	}
-
-	ent->hash = dentry->d_name.hash;
-	memcpy(ent->name, dentry->d_name.name, 1+(ent->len = dentry->d_name.len));
-	ent->ino = ino;
-	ent->dentry = dentry;
-	autofs_hash_insert(dh,ent);
-
-	inc_nlink(dir);
-
-	inode = autofs_iget(dir->i_sb, ino);
-	if (IS_ERR(inode)) {
-		drop_nlink(dir);
-		return PTR_ERR(inode);
-	}
-
-	d_instantiate(dentry, inode);
-	unlock_kernel();
-
-	return 0;
-}
-
-/* Get/set timeout ioctl() operation */
-#ifdef CONFIG_COMPAT
-static inline int autofs_compat_get_set_timeout(struct autofs_sb_info *sbi,
-					 unsigned int __user *p)
-{
-	unsigned long ntimeout;
-
-	if (get_user(ntimeout, p) ||
-	    put_user(sbi->exp_timeout / HZ, p))
-		return -EFAULT;
-
-	if (ntimeout > UINT_MAX/HZ)
-		sbi->exp_timeout = 0;
-	else
-		sbi->exp_timeout = ntimeout * HZ;
-
-	return 0;
-}
-#endif
-
-static inline int autofs_get_set_timeout(struct autofs_sb_info *sbi,
-					 unsigned long __user *p)
-{
-	unsigned long ntimeout;
-
-	if (get_user(ntimeout, p) ||
-	    put_user(sbi->exp_timeout / HZ, p))
-		return -EFAULT;
-
-	if (ntimeout > ULONG_MAX/HZ)
-		sbi->exp_timeout = 0;
-	else
-		sbi->exp_timeout = ntimeout * HZ;
-
-	return 0;
-}
-
-/* Return protocol version */
-static inline int autofs_get_protover(int __user *p)
-{
-	return put_user(AUTOFS_PROTO_VERSION, p);
-}
-
-/* Perform an expiry operation */
-static inline int autofs_expire_run(struct super_block *sb,
-				    struct autofs_sb_info *sbi,
-				    struct vfsmount *mnt,
-				    struct autofs_packet_expire __user *pkt_p)
-{
-	struct autofs_dir_ent *ent;
-	struct autofs_packet_expire pkt;
-
-	memset(&pkt,0,sizeof pkt);
-
-	pkt.hdr.proto_version = AUTOFS_PROTO_VERSION;
-	pkt.hdr.type = autofs_ptype_expire;
-
-	if (!sbi->exp_timeout || !(ent = autofs_expire(sb,sbi,mnt)))
-		return -EAGAIN;
-
-	pkt.len = ent->len;
-	memcpy(pkt.name, ent->name, pkt.len);
-	pkt.name[pkt.len] = '\0';
-
-	if (copy_to_user(pkt_p, &pkt, sizeof(struct autofs_packet_expire)))
-		return -EFAULT;
-
-	return 0;
-}
-
-/*
- * ioctl()'s on the root directory is the chief method for the daemon to
- * generate kernel reactions
- */
-static int autofs_do_root_ioctl(struct inode *inode, struct file *filp,
-			     unsigned int cmd, unsigned long arg)
-{
-	struct autofs_sb_info *sbi = autofs_sbi(inode->i_sb);
-	void __user *argp = (void __user *)arg;
-
-	DPRINTK(("autofs_ioctl: cmd = 0x%08x, arg = 0x%08lx, sbi = %p, pgrp = %u\n",cmd,arg,sbi,task_pgrp_nr(current)));
-
-	if (_IOC_TYPE(cmd) != _IOC_TYPE(AUTOFS_IOC_FIRST) ||
-	     _IOC_NR(cmd) - _IOC_NR(AUTOFS_IOC_FIRST) >= AUTOFS_IOC_COUNT)
-		return -ENOTTY;
-	
-	if (!autofs_oz_mode(sbi) && !capable(CAP_SYS_ADMIN))
-		return -EPERM;
-	
-	switch(cmd) {
-	case AUTOFS_IOC_READY:	/* Wait queue: go ahead and retry */
-		return autofs_wait_release(sbi,(autofs_wqt_t)arg,0);
-	case AUTOFS_IOC_FAIL:	/* Wait queue: fail with ENOENT */
-		return autofs_wait_release(sbi,(autofs_wqt_t)arg,-ENOENT);
-	case AUTOFS_IOC_CATATONIC: /* Enter catatonic mode (daemon shutdown) */
-		autofs_catatonic_mode(sbi);
-		return 0;
-	case AUTOFS_IOC_PROTOVER: /* Get protocol version */
-		return autofs_get_protover(argp);
-#ifdef CONFIG_COMPAT
-	case AUTOFS_IOC_SETTIMEOUT32:
-		return autofs_compat_get_set_timeout(sbi, argp);
-#endif
-	case AUTOFS_IOC_SETTIMEOUT:
-		return autofs_get_set_timeout(sbi, argp);
-	case AUTOFS_IOC_EXPIRE:
-		return autofs_expire_run(inode->i_sb, sbi, filp->f_path.mnt,
-					 argp);
-	default:
-		return -ENOSYS;
-	}
-
-}
-
-static long autofs_root_ioctl(struct file *filp,
-			     unsigned int cmd, unsigned long arg)
-{
-	int ret;
-
-	lock_kernel();
-	ret = autofs_do_root_ioctl(filp->f_path.dentry->d_inode,
-				   filp, cmd, arg);
-	unlock_kernel();
-
-	return ret;
-}
-
-#ifdef CONFIG_COMPAT
-static long autofs_root_compat_ioctl(struct file *filp,
-			     unsigned int cmd, unsigned long arg)
-{
-	struct inode *inode = filp->f_path.dentry->d_inode;
-	int ret;
-
-	lock_kernel();
-	if (cmd == AUTOFS_IOC_READY || cmd == AUTOFS_IOC_FAIL)
-		ret = autofs_do_root_ioctl(inode, filp, cmd, arg);
-	else
-		ret = autofs_do_root_ioctl(inode, filp, cmd,
-			(unsigned long)compat_ptr(arg));
-	unlock_kernel();
-
-	return ret;
-}
-#endif