2 files changed, 0 insertions, 503 deletions

diff --git a/ANDROID_3.4.5/fs/exportfs/Makefile b/ANDROID_3.4.5/fs/exportfs/Makefile
deleted file mode 100644
index d7c5d4dd..00000000
--- a/ANDROID_3.4.5/fs/exportfs/Makefile
+++ /dev/null
@@ -1,6 +0,0 @@
-#
-# Makefile for the filesystem export support routines.
-
-obj-$(CONFIG_EXPORTFS) += exportfs.o
-
-exportfs-objs := expfs.o
diff --git a/ANDROID_3.4.5/fs/exportfs/expfs.c b/ANDROID_3.4.5/fs/exportfs/expfs.c
deleted file mode 100644
index b05acb79..00000000
--- a/ANDROID_3.4.5/fs/exportfs/expfs.c
+++ /dev/null
@@ -1,497 +0,0 @@
-/*
- * Copyright (C) Neil Brown 2002
- * Copyright (C) Christoph Hellwig 2007
- *
- * This file contains the code mapping from inodes to NFS file handles,
- * and for mapping back from file handles to dentries.
- *
- * For details on why we do all the strange and hairy things in here
- * take a look at Documentation/filesystems/nfs/Exporting.
- */
-#include <linux/exportfs.h>
-#include <linux/fs.h>
-#include <linux/file.h>
-#include <linux/module.h>
-#include <linux/mount.h>
-#include <linux/namei.h>
-#include <linux/sched.h>
-
-#define dprintk(fmt, args...) do{}while(0)
-
-
-static int get_name(struct vfsmount *mnt, struct dentry *dentry, char *name,
-		struct dentry *child);
-
-
-static int exportfs_get_name(struct vfsmount *mnt, struct dentry *dir,
-		char *name, struct dentry *child)
-{
-	const struct export_operations *nop = dir->d_sb->s_export_op;
-
-	if (nop->get_name)
-		return nop->get_name(dir, name, child);
-	else
-		return get_name(mnt, dir, name, child);
-}
-
-/*
- * Check if the dentry or any of it's aliases is acceptable.
- */
-static struct dentry *
-find_acceptable_alias(struct dentry *result,
-		int (*acceptable)(void *context, struct dentry *dentry),
-		void *context)
-{
-	struct dentry *dentry, *toput = NULL;
-	struct inode *inode;
-
-	if (acceptable(context, result))
-		return result;
-
-	inode = result->d_inode;
-	spin_lock(&inode->i_lock);
-	list_for_each_entry(dentry, &inode->i_dentry, d_alias) {
-		dget(dentry);
-		spin_unlock(&inode->i_lock);
-		if (toput)
-			dput(toput);
-		if (dentry != result && acceptable(context, dentry)) {
-			dput(result);
-			return dentry;
-		}
-		spin_lock(&inode->i_lock);
-		toput = dentry;
-	}
-	spin_unlock(&inode->i_lock);
-
-	if (toput)
-		dput(toput);
-	return NULL;
-}
-
-/*
- * Find root of a disconnected subtree and return a reference to it.
- */
-static struct dentry *
-find_disconnected_root(struct dentry *dentry)
-{
-	dget(dentry);
-	while (!IS_ROOT(dentry)) {
-		struct dentry *parent = dget_parent(dentry);
-
-		if (!(parent->d_flags & DCACHE_DISCONNECTED)) {
-			dput(parent);
-			break;
-		}
-
-		dput(dentry);
-		dentry = parent;
-	}
-	return dentry;
-}
-
-/*
- * Make sure target_dir is fully connected to the dentry tree.
- *
- * It may already be, as the flag isn't always updated when connection happens.
- */
-static int
-reconnect_path(struct vfsmount *mnt, struct dentry *target_dir, char *nbuf)
-{
-	int noprogress = 0;
-	int err = -ESTALE;
-
-	/*
-	 * It is possible that a confused file system might not let us complete
-	 * the path to the root.  For example, if get_parent returns a directory
-	 * in which we cannot find a name for the child.  While this implies a
-	 * very sick filesystem we don't want it to cause knfsd to spin.  Hence
-	 * the noprogress counter.  If we go through the loop 10 times (2 is
-	 * probably enough) without getting anywhere, we just give up
-	 */
-	while (target_dir->d_flags & DCACHE_DISCONNECTED && noprogress++ < 10) {
-		struct dentry *pd = find_disconnected_root(target_dir);
-
-		if (!IS_ROOT(pd)) {
-			/* must have found a connected parent - great */
-			spin_lock(&pd->d_lock);
-			pd->d_flags &= ~DCACHE_DISCONNECTED;
-			spin_unlock(&pd->d_lock);
-			noprogress = 0;
-		} else if (pd == mnt->mnt_sb->s_root) {
-			printk(KERN_ERR "export: Eeek filesystem root is not connected, impossible\n");
-			spin_lock(&pd->d_lock);
-			pd->d_flags &= ~DCACHE_DISCONNECTED;
-			spin_unlock(&pd->d_lock);
-			noprogress = 0;
-		} else {
-			/*
-			 * We have hit the top of a disconnected path, try to
-			 * find parent and connect.
-			 *
-			 * Racing with some other process renaming a directory
-			 * isn't much of a problem here.  If someone renames
-			 * the directory, it will end up properly connected,
-			 * which is what we want
-			 *
-			 * Getting the parent can't be supported generically,
-			 * the locking is too icky.
-			 *
-			 * Instead we just return EACCES.  If server reboots
-			 * or inodes get flushed, you lose
-			 */
-			struct dentry *ppd = ERR_PTR(-EACCES);
-			struct dentry *npd;
-
-			mutex_lock(&pd->d_inode->i_mutex);
-			if (mnt->mnt_sb->s_export_op->get_parent)
-				ppd = mnt->mnt_sb->s_export_op->get_parent(pd);
-			mutex_unlock(&pd->d_inode->i_mutex);
-
-			if (IS_ERR(ppd)) {
-				err = PTR_ERR(ppd);
-				dprintk("%s: get_parent of %ld failed, err %d\n",
-					__func__, pd->d_inode->i_ino, err);
-				dput(pd);
-				break;
-			}
-
-			dprintk("%s: find name of %lu in %lu\n", __func__,
-				pd->d_inode->i_ino, ppd->d_inode->i_ino);
-			err = exportfs_get_name(mnt, ppd, nbuf, pd);
-			if (err) {
-				dput(ppd);
-				dput(pd);
-				if (err == -ENOENT)
-					/* some race between get_parent and
-					 * get_name?  just try again
-					 */
-					continue;
-				break;
-			}
-			dprintk("%s: found name: %s\n", __func__, nbuf);
-			mutex_lock(&ppd->d_inode->i_mutex);
-			npd = lookup_one_len(nbuf, ppd, strlen(nbuf));
-			mutex_unlock(&ppd->d_inode->i_mutex);
-			if (IS_ERR(npd)) {
-				err = PTR_ERR(npd);
-				dprintk("%s: lookup failed: %d\n",
-					__func__, err);
-				dput(ppd);
-				dput(pd);
-				break;
-			}
-			/* we didn't really want npd, we really wanted
-			 * a side-effect of the lookup.
-			 * hopefully, npd == pd, though it isn't really
-			 * a problem if it isn't
-			 */
-			if (npd == pd)
-				noprogress = 0;
-			else
-				printk("%s: npd != pd\n", __func__);
-			dput(npd);
-			dput(ppd);
-			if (IS_ROOT(pd)) {
-				/* something went wrong, we have to give up */
-				dput(pd);
-				break;
-			}
-		}
-		dput(pd);
-	}
-
-	if (target_dir->d_flags & DCACHE_DISCONNECTED) {
-		/* something went wrong - oh-well */
-		if (!err)
-			err = -ESTALE;
-		return err;
-	}
-
-	return 0;
-}
-
-struct getdents_callback {
-	char *name;		/* name that was found. It already points to a
-				   buffer NAME_MAX+1 is size */
-	unsigned long ino;	/* the inum we are looking for */
-	int found;		/* inode matched? */
-	int sequence;		/* sequence counter */
-};
-
-/*
- * A rather strange filldir function to capture
- * the name matching the specified inode number.
- */
-static int filldir_one(void * __buf, const char * name, int len,
-			loff_t pos, u64 ino, unsigned int d_type)
-{
-	struct getdents_callback *buf = __buf;
-	int result = 0;
-
-	buf->sequence++;
-	if (buf->ino == ino) {
-		memcpy(buf->name, name, len);
-		buf->name[len] = '\0';
-		buf->found = 1;
-		result = -1;
-	}
-	return result;
-}
-
-/**
- * get_name - default export_operations->get_name function
- * @dentry: the directory in which to find a name
- * @name:   a pointer to a %NAME_MAX+1 char buffer to store the name
- * @child:  the dentry for the child directory.
- *
- * calls readdir on the parent until it finds an entry with
- * the same inode number as the child, and returns that.
- */
-static int get_name(struct vfsmount *mnt, struct dentry *dentry,
-		char *name, struct dentry *child)
-{
-	const struct cred *cred = current_cred();
-	struct inode *dir = dentry->d_inode;
-	int error;
-	struct file *file;
-	struct getdents_callback buffer;
-
-	error = -ENOTDIR;
-	if (!dir || !S_ISDIR(dir->i_mode))
-		goto out;
-	error = -EINVAL;
-	if (!dir->i_fop)
-		goto out;
-	/*
-	 * Open the directory ...
-	 */
-	file = dentry_open(dget(dentry), mntget(mnt), O_RDONLY, cred);
-	error = PTR_ERR(file);
-	if (IS_ERR(file))
-		goto out;
-
-	error = -EINVAL;
-	if (!file->f_op->readdir)
-		goto out_close;
-
-	buffer.name = name;
-	buffer.ino = child->d_inode->i_ino;
-	buffer.found = 0;
-	buffer.sequence = 0;
-	while (1) {
-		int old_seq = buffer.sequence;
-
-		error = vfs_readdir(file, filldir_one, &buffer);
-		if (buffer.found) {
-			error = 0;
-			break;
-		}
-
-		if (error < 0)
-			break;
-
-		error = -ENOENT;
-		if (old_seq == buffer.sequence)
-			break;
-	}
-
-out_close:
-	fput(file);
-out:
-	return error;
-}
-
-/**
- * export_encode_fh - default export_operations->encode_fh function
- * @dentry:  the dentry to encode
- * @fh:      where to store the file handle fragment
- * @max_len: maximum length to store there
- * @connectable: whether to store parent information
- *
- * This default encode_fh function assumes that the 32 inode number
- * is suitable for locating an inode, and that the generation number
- * can be used to check that it is still valid.  It places them in the
- * filehandle fragment where export_decode_fh expects to find them.
- */
-static int export_encode_fh(struct dentry *dentry, struct fid *fid,
-		int *max_len, int connectable)
-{
-	struct inode * inode = dentry->d_inode;
-	int len = *max_len;
-	int type = FILEID_INO32_GEN;
-
-	if (connectable && (len < 4)) {
-		*max_len = 4;
-		return 255;
-	} else if (len < 2) {
-		*max_len = 2;
-		return 255;
-	}
-
-	len = 2;
-	fid->i32.ino = inode->i_ino;
-	fid->i32.gen = inode->i_generation;
-	if (connectable && !S_ISDIR(inode->i_mode)) {
-		struct inode *parent;
-
-		spin_lock(&dentry->d_lock);
-		parent = dentry->d_parent->d_inode;
-		fid->i32.parent_ino = parent->i_ino;
-		fid->i32.parent_gen = parent->i_generation;
-		spin_unlock(&dentry->d_lock);
-		len = 4;
-		type = FILEID_INO32_GEN_PARENT;
-	}
-	*max_len = len;
-	return type;
-}
-
-int exportfs_encode_fh(struct dentry *dentry, struct fid *fid, int *max_len,
-		int connectable)
-{
-	const struct export_operations *nop = dentry->d_sb->s_export_op;
-	int error;
-
-	if (nop->encode_fh)
-		error = nop->encode_fh(dentry, fid->raw, max_len, connectable);
-	else
-		error = export_encode_fh(dentry, fid, max_len, connectable);
-
-	return error;
-}
-EXPORT_SYMBOL_GPL(exportfs_encode_fh);
-
-struct dentry *exportfs_decode_fh(struct vfsmount *mnt, struct fid *fid,
-		int fh_len, int fileid_type,
-		int (*acceptable)(void *, struct dentry *), void *context)
-{
-	const struct export_operations *nop = mnt->mnt_sb->s_export_op;
-	struct dentry *result, *alias;
-	char nbuf[NAME_MAX+1];
-	int err;
-
-	/*
-	 * Try to get any dentry for the given file handle from the filesystem.
-	 */
-	if (!nop || !nop->fh_to_dentry)
-		return ERR_PTR(-ESTALE);
-	result = nop->fh_to_dentry(mnt->mnt_sb, fid, fh_len, fileid_type);
-	if (!result)
-		result = ERR_PTR(-ESTALE);
-	if (IS_ERR(result))
-		return result;
-
-	if (S_ISDIR(result->d_inode->i_mode)) {
-		/*
-		 * This request is for a directory.
-		 *
-		 * On the positive side there is only one dentry for each
-		 * directory inode.  On the negative side this implies that we
-		 * to ensure our dentry is connected all the way up to the
-		 * filesystem root.
-		 */
-		if (result->d_flags & DCACHE_DISCONNECTED) {
-			err = reconnect_path(mnt, result, nbuf);
-			if (err)
-				goto err_result;
-		}
-
-		if (!acceptable(context, result)) {
-			err = -EACCES;
-			goto err_result;
-		}
-
-		return result;
-	} else {
-		/*
-		 * It's not a directory.  Life is a little more complicated.
-		 */
-		struct dentry *target_dir, *nresult;
-
-		/*
-		 * See if either the dentry we just got from the filesystem
-		 * or any alias for it is acceptable.  This is always true
-		 * if this filesystem is exported without the subtreecheck
-		 * option.  If the filesystem is exported with the subtree
-		 * check option there's a fair chance we need to look at
-		 * the parent directory in the file handle and make sure
-		 * it's connected to the filesystem root.
-		 */
-		alias = find_acceptable_alias(result, acceptable, context);
-		if (alias)
-			return alias;
-
-		/*
-		 * Try to extract a dentry for the parent directory from the
-		 * file handle.  If this fails we'll have to give up.
-		 */
-		err = -ESTALE;
-		if (!nop->fh_to_parent)
-			goto err_result;
-
-		target_dir = nop->fh_to_parent(mnt->mnt_sb, fid,
-				fh_len, fileid_type);
-		if (!target_dir)
-			goto err_result;
-		err = PTR_ERR(target_dir);
-		if (IS_ERR(target_dir))
-			goto err_result;
-
-		/*
-		 * And as usual we need to make sure the parent directory is
-		 * connected to the filesystem root.  The VFS really doesn't
-		 * like disconnected directories..
-		 */
-		err = reconnect_path(mnt, target_dir, nbuf);
-		if (err) {
-			dput(target_dir);
-			goto err_result;
-		}
-
-		/*
-		 * Now that we've got both a well-connected parent and a
-		 * dentry for the inode we're after, make sure that our
-		 * inode is actually connected to the parent.
-		 */
-		err = exportfs_get_name(mnt, target_dir, nbuf, result);
-		if (!err) {
-			mutex_lock(&target_dir->d_inode->i_mutex);
-			nresult = lookup_one_len(nbuf, target_dir,
-						 strlen(nbuf));
-			mutex_unlock(&target_dir->d_inode->i_mutex);
-			if (!IS_ERR(nresult)) {
-				if (nresult->d_inode) {
-					dput(result);
-					result = nresult;
-				} else
-					dput(nresult);
-			}
-		}
-
-		/*
-		 * At this point we are done with the parent, but it's pinned
-		 * by the child dentry anyway.
-		 */
-		dput(target_dir);
-
-		/*
-		 * And finally make sure the dentry is actually acceptable
-		 * to NFSD.
-		 */
-		alias = find_acceptable_alias(result, acceptable, context);
-		if (!alias) {
-			err = -EACCES;
-			goto err_result;
-		}
-
-		return alias;
-	}
-
- err_result:
-	dput(result);
-	return ERR_PTR(err);
-}
-EXPORT_SYMBOL_GPL(exportfs_decode_fh);
-
-MODULE_LICENSE("GPL");