1 files changed, 0 insertions, 377 deletions
diff --git a/ANDROID_3.4.5/fs/sysv/dir.c b/ANDROID_3.4.5/fs/sysv/dir.c
deleted file mode 100644
index a77c4215..00000000
--- a/ANDROID_3.4.5/fs/sysv/dir.c
+++ /dev/null
@@ -1,377 +0,0 @@
-/*
- *  linux/fs/sysv/dir.c
- *
- *  minix/dir.c
- *  Copyright (C) 1991, 1992  Linus Torvalds
- *
- *  coh/dir.c
- *  Copyright (C) 1993  Pascal Haible, Bruno Haible
- *
- *  sysv/dir.c
- *  Copyright (C) 1993  Bruno Haible
- *
- *  SystemV/Coherent directory handling functions
- */
-
-#include <linux/pagemap.h>
-#include <linux/highmem.h>
-#include <linux/swap.h>
-#include "sysv.h"
-
-static int sysv_readdir(struct file *, void *, filldir_t);
-
-const struct file_operations sysv_dir_operations = {
-	.llseek		= generic_file_llseek,
-	.read		= generic_read_dir,
-	.readdir	= sysv_readdir,
-	.fsync		= generic_file_fsync,
-};
-
-static inline void dir_put_page(struct page *page)
-{
-	kunmap(page);
-	page_cache_release(page);
-}
-
-static inline unsigned long dir_pages(struct inode *inode)
-{
-	return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT;
-}
-
-static int dir_commit_chunk(struct page *page, loff_t pos, unsigned len)
-{
-	struct address_space *mapping = page->mapping;
-	struct inode *dir = mapping->host;
-	int err = 0;
-
-	block_write_end(NULL, mapping, pos, len, len, page, NULL);
-	if (pos+len > dir->i_size) {
-		i_size_write(dir, pos+len);
-		mark_inode_dirty(dir);
-	}
-	if (IS_DIRSYNC(dir))
-		err = write_one_page(page, 1);
-	else
-		unlock_page(page);
-	return err;
-}
-
-static struct page * dir_get_page(struct inode *dir, unsigned long n)
-{
-	struct address_space *mapping = dir->i_mapping;
-	struct page *page = read_mapping_page(mapping, n, NULL);
-	if (!IS_ERR(page))
-		kmap(page);
-	return page;
-}
-
-static int sysv_readdir(struct file * filp, void * dirent, filldir_t filldir)
-{
-	unsigned long pos = filp->f_pos;
-	struct inode *inode = filp->f_path.dentry->d_inode;
-	struct super_block *sb = inode->i_sb;
-	unsigned offset = pos & ~PAGE_CACHE_MASK;
-	unsigned long n = pos >> PAGE_CACHE_SHIFT;
-	unsigned long npages = dir_pages(inode);
-
-	pos = (pos + SYSV_DIRSIZE-1) & ~(SYSV_DIRSIZE-1);
-	if (pos >= inode->i_size)
-		goto done;
-
-	for ( ; n < npages; n++, offset = 0) {
-		char *kaddr, *limit;
-		struct sysv_dir_entry *de;
-		struct page *page = dir_get_page(inode, n);
-
-		if (IS_ERR(page))
-			continue;
-		kaddr = (char *)page_address(page);
-		de = (struct sysv_dir_entry *)(kaddr+offset);
-		limit = kaddr + PAGE_CACHE_SIZE - SYSV_DIRSIZE;
-		for ( ;(char*)de <= limit; de++) {
-			char *name = de->name;
-			int over;
-
-			if (!de->inode)
-				continue;
-
-			offset = (char *)de - kaddr;
-
-			over = filldir(dirent, name, strnlen(name,SYSV_NAMELEN),
-					((loff_t)n<<PAGE_CACHE_SHIFT) | offset,
-					fs16_to_cpu(SYSV_SB(sb), de->inode),
-					DT_UNKNOWN);
-			if (over) {
-				dir_put_page(page);
-				goto done;
-			}
-		}
-		dir_put_page(page);
-	}
-
-done:
-	filp->f_pos = ((loff_t)n << PAGE_CACHE_SHIFT) | offset;
-	return 0;
-}
-
-/* compare strings: name[0..len-1] (not zero-terminated) and
- * buffer[0..] (filled with zeroes up to buffer[0..maxlen-1])
- */
-static inline int namecompare(int len, int maxlen,
-	const char * name, const char * buffer)
-{
-	if (len < maxlen && buffer[len])
-		return 0;
-	return !memcmp(name, buffer, len);
-}
-
-/*
- *	sysv_find_entry()
- *
- * finds an entry in the specified directory with the wanted name. It
- * returns the cache buffer in which the entry was found, and the entry
- * itself (as a parameter - res_dir). It does NOT read the inode of the
- * entry - you'll have to do that yourself if you want to.
- */
-struct sysv_dir_entry *sysv_find_entry(struct dentry *dentry, struct page **res_page)
-{
-	const char * name = dentry->d_name.name;
-	int namelen = dentry->d_name.len;
-	struct inode * dir = dentry->d_parent->d_inode;
-	unsigned long start, n;
-	unsigned long npages = dir_pages(dir);
-	struct page *page = NULL;
-	struct sysv_dir_entry *de;
-
-	*res_page = NULL;
-
-	start = SYSV_I(dir)->i_dir_start_lookup;
-	if (start >= npages)
-		start = 0;
-	n = start;
-
-	do {
-		char *kaddr;
-		page = dir_get_page(dir, n);
-		if (!IS_ERR(page)) {
-			kaddr = (char*)page_address(page);
-			de = (struct sysv_dir_entry *) kaddr;
-			kaddr += PAGE_CACHE_SIZE - SYSV_DIRSIZE;
-			for ( ; (char *) de <= kaddr ; de++) {
-				if (!de->inode)
-					continue;
-				if (namecompare(namelen, SYSV_NAMELEN,
-							name, de->name))
-					goto found;
-			}
-			dir_put_page(page);
-		}
-
-		if (++n >= npages)
-			n = 0;
-	} while (n != start);
-
-	return NULL;
-
-found:
-	SYSV_I(dir)->i_dir_start_lookup = n;
-	*res_page = page;
-	return de;
-}
-
-int sysv_add_link(struct dentry *dentry, struct inode *inode)
-{
-	struct inode *dir = dentry->d_parent->d_inode;
-	const char * name = dentry->d_name.name;
-	int namelen = dentry->d_name.len;
-	struct page *page = NULL;
-	struct sysv_dir_entry * de;
-	unsigned long npages = dir_pages(dir);
-	unsigned long n;
-	char *kaddr;
-	loff_t pos;
-	int err;
-
-	/* We take care of directory expansion in the same loop */
-	for (n = 0; n <= npages; n++) {
-		page = dir_get_page(dir, n);
-		err = PTR_ERR(page);
-		if (IS_ERR(page))
-			goto out;
-		kaddr = (char*)page_address(page);
-		de = (struct sysv_dir_entry *)kaddr;
-		kaddr += PAGE_CACHE_SIZE - SYSV_DIRSIZE;
-		while ((char *)de <= kaddr) {
-			if (!de->inode)
-				goto got_it;
-			err = -EEXIST;
-			if (namecompare(namelen, SYSV_NAMELEN, name, de->name)) 
-				goto out_page;
-			de++;
-		}
-		dir_put_page(page);
-	}
-	BUG();
-	return -EINVAL;
-
-got_it:
-	pos = page_offset(page) +
-			(char*)de - (char*)page_address(page);
-	lock_page(page);
-	err = sysv_prepare_chunk(page, pos, SYSV_DIRSIZE);
-	if (err)
-		goto out_unlock;
-	memcpy (de->name, name, namelen);
-	memset (de->name + namelen, 0, SYSV_DIRSIZE - namelen - 2);
-	de->inode = cpu_to_fs16(SYSV_SB(inode->i_sb), inode->i_ino);
-	err = dir_commit_chunk(page, pos, SYSV_DIRSIZE);
-	dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
-	mark_inode_dirty(dir);
-out_page:
-	dir_put_page(page);
-out:
-	return err;
-out_unlock:
-	unlock_page(page);
-	goto out_page;
-}
-
-int sysv_delete_entry(struct sysv_dir_entry *de, struct page *page)
-{
-	struct inode *inode = page->mapping->host;
-	char *kaddr = (char*)page_address(page);
-	loff_t pos = page_offset(page) + (char *)de - kaddr;
-	int err;
-
-	lock_page(page);
-	err = sysv_prepare_chunk(page, pos, SYSV_DIRSIZE);
-	BUG_ON(err);
-	de->inode = 0;
-	err = dir_commit_chunk(page, pos, SYSV_DIRSIZE);
-	dir_put_page(page);
-	inode->i_ctime = inode->i_mtime = CURRENT_TIME_SEC;
-	mark_inode_dirty(inode);
-	return err;
-}
-
-int sysv_make_empty(struct inode *inode, struct inode *dir)
-{
-	struct page *page = grab_cache_page(inode->i_mapping, 0);
-	struct sysv_dir_entry * de;
-	char *base;
-	int err;
-
-	if (!page)
-		return -ENOMEM;
-	err = sysv_prepare_chunk(page, 0, 2 * SYSV_DIRSIZE);
-	if (err) {
-		unlock_page(page);
-		goto fail;
-	}
-	kmap(page);
-
-	base = (char*)page_address(page);
-	memset(base, 0, PAGE_CACHE_SIZE);
-
-	de = (struct sysv_dir_entry *) base;
-	de->inode = cpu_to_fs16(SYSV_SB(inode->i_sb), inode->i_ino);
-	strcpy(de->name,".");
-	de++;
-	de->inode = cpu_to_fs16(SYSV_SB(inode->i_sb), dir->i_ino);
-	strcpy(de->name,"..");
-
-	kunmap(page);
-	err = dir_commit_chunk(page, 0, 2 * SYSV_DIRSIZE);
-fail:
-	page_cache_release(page);
-	return err;
-}
-
-/*
- * routine to check that the specified directory is empty (for rmdir)
- */
-int sysv_empty_dir(struct inode * inode)
-{
-	struct super_block *sb = inode->i_sb;
-	struct page *page = NULL;
-	unsigned long i, npages = dir_pages(inode);
-
-	for (i = 0; i < npages; i++) {
-		char *kaddr;
-		struct sysv_dir_entry * de;
-		page = dir_get_page(inode, i);
-
-		if (IS_ERR(page))
-			continue;
-
-		kaddr = (char *)page_address(page);
-		de = (struct sysv_dir_entry *)kaddr;
-		kaddr += PAGE_CACHE_SIZE-SYSV_DIRSIZE;
-
-		for ( ;(char *)de <= kaddr; de++) {
-			if (!de->inode)
-				continue;
-			/* check for . and .. */
-			if (de->name[0] != '.')
-				goto not_empty;
-			if (!de->name[1]) {
-				if (de->inode == cpu_to_fs16(SYSV_SB(sb),
-							inode->i_ino))
-					continue;
-				goto not_empty;
-			}
-			if (de->name[1] != '.' || de->name[2])
-				goto not_empty;
-		}
-		dir_put_page(page);
-	}
-	return 1;
-
-not_empty:
-	dir_put_page(page);
-	return 0;
-}
-
-/* Releases the page */
-void sysv_set_link(struct sysv_dir_entry *de, struct page *page,
-	struct inode *inode)
-{
-	struct inode *dir = page->mapping->host;
-	loff_t pos = page_offset(page) +
-			(char *)de-(char*)page_address(page);
-	int err;
-
-	lock_page(page);
-	err = sysv_prepare_chunk(page, pos, SYSV_DIRSIZE);
-	BUG_ON(err);
-	de->inode = cpu_to_fs16(SYSV_SB(inode->i_sb), inode->i_ino);
-	err = dir_commit_chunk(page, pos, SYSV_DIRSIZE);
-	dir_put_page(page);
-	dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
-	mark_inode_dirty(dir);
-}
-
-struct sysv_dir_entry * sysv_dotdot (struct inode *dir, struct page **p)
-{
-	struct page *page = dir_get_page(dir, 0);
-	struct sysv_dir_entry *de = NULL;
-
-	if (!IS_ERR(page)) {
-		de = (struct sysv_dir_entry*) page_address(page) + 1;
-		*p = page;
-	}
-	return de;
-}
-
-ino_t sysv_inode_by_name(struct dentry *dentry)
-{
-	struct page *page;
-	struct sysv_dir_entry *de = sysv_find_entry (dentry, &page);
-	ino_t res = 0;
-	
-	if (de) {
-		res = fs16_to_cpu(SYSV_SB(dentry->d_sb), de->inode);
-		dir_put_page(page);
-	}
-	return res;
-}