Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 0 insertions, 598 deletions

diff --git a/ANDROID_3.4.5/fs/cramfs/inode.c b/ANDROID_3.4.5/fs/cramfs/inode.c
deleted file mode 100644
index d013c464..00000000
--- a/ANDROID_3.4.5/fs/cramfs/inode.c
+++ /dev/null
@@ -1,598 +0,0 @@
-/*
- * Compressed rom filesystem for Linux.
- *
- * Copyright (C) 1999 Linus Torvalds.
- *
- * This file is released under the GPL.
- */
-
-/*
- * These are the VFS interfaces to the compressed rom filesystem.
- * The actual compression is based on zlib, see the other files.
- */
-
-#include <linux/module.h>
-#include <linux/fs.h>
-#include <linux/pagemap.h>
-#include <linux/init.h>
-#include <linux/string.h>
-#include <linux/blkdev.h>
-#include <linux/cramfs_fs.h>
-#include <linux/slab.h>
-#include <linux/cramfs_fs_sb.h>
-#include <linux/vfs.h>
-#include <linux/mutex.h>
-
-#include <asm/uaccess.h>
-
-static const struct super_operations cramfs_ops;
-static const struct inode_operations cramfs_dir_inode_operations;
-static const struct file_operations cramfs_directory_operations;
-static const struct address_space_operations cramfs_aops;
-
-static DEFINE_MUTEX(read_mutex);
-
-
-/* These macros may change in future, to provide better st_ino semantics. */
-#define OFFSET(x)	((x)->i_ino)
-
-static unsigned long cramino(const struct cramfs_inode *cino, unsigned int offset)
-{
-	if (!cino->offset)
-		return offset + 1;
-	if (!cino->size)
-		return offset + 1;
-
-	/*
-	 * The file mode test fixes buggy mkcramfs implementations where
-	 * cramfs_inode->offset is set to a non zero value for entries
-	 * which did not contain data, like devices node and fifos.
-	 */
-	switch (cino->mode & S_IFMT) {
-	case S_IFREG:
-	case S_IFDIR:
-	case S_IFLNK:
-		return cino->offset << 2;
-	default:
-		break;
-	}
-	return offset + 1;
-}
-
-static struct inode *get_cramfs_inode(struct super_block *sb,
-	const struct cramfs_inode *cramfs_inode, unsigned int offset)
-{
-	struct inode *inode;
-	static struct timespec zerotime;
-
-	inode = iget_locked(sb, cramino(cramfs_inode, offset));
-	if (!inode)
-		return ERR_PTR(-ENOMEM);
-	if (!(inode->i_state & I_NEW))
-		return inode;
-
-	switch (cramfs_inode->mode & S_IFMT) {
-	case S_IFREG:
-		inode->i_fop = &generic_ro_fops;
-		inode->i_data.a_ops = &cramfs_aops;
-		break;
-	case S_IFDIR:
-		inode->i_op = &cramfs_dir_inode_operations;
-		inode->i_fop = &cramfs_directory_operations;
-		break;
-	case S_IFLNK:
-		inode->i_op = &page_symlink_inode_operations;
-		inode->i_data.a_ops = &cramfs_aops;
-		break;
-	default:
-		init_special_inode(inode, cramfs_inode->mode,
-				old_decode_dev(cramfs_inode->size));
-	}
-
-	inode->i_mode = cramfs_inode->mode;
-	inode->i_uid = cramfs_inode->uid;
-	inode->i_gid = cramfs_inode->gid;
-
-	/* if the lower 2 bits are zero, the inode contains data */
-	if (!(inode->i_ino & 3)) {
-		inode->i_size = cramfs_inode->size;
-		inode->i_blocks = (cramfs_inode->size - 1) / 512 + 1;
-	}
-
-	/* Struct copy intentional */
-	inode->i_mtime = inode->i_atime = inode->i_ctime = zerotime;
-	/* inode->i_nlink is left 1 - arguably wrong for directories,
-	   but it's the best we can do without reading the directory
-	   contents.  1 yields the right result in GNU find, even
-	   without -noleaf option. */
-
-	unlock_new_inode(inode);
-
-	return inode;
-}
-
-/*
- * We have our own block cache: don't fill up the buffer cache
- * with the rom-image, because the way the filesystem is set
- * up the accesses should be fairly regular and cached in the
- * page cache and dentry tree anyway..
- *
- * This also acts as a way to guarantee contiguous areas of up to
- * BLKS_PER_BUF*PAGE_CACHE_SIZE, so that the caller doesn't need to
- * worry about end-of-buffer issues even when decompressing a full
- * page cache.
- */
-#define READ_BUFFERS (2)
-/* NEXT_BUFFER(): Loop over [0..(READ_BUFFERS-1)]. */
-#define NEXT_BUFFER(_ix) ((_ix) ^ 1)
-
-/*
- * BLKS_PER_BUF_SHIFT should be at least 2 to allow for "compressed"
- * data that takes up more space than the original and with unlucky
- * alignment.
- */
-#define BLKS_PER_BUF_SHIFT	(2)
-#define BLKS_PER_BUF		(1 << BLKS_PER_BUF_SHIFT)
-#define BUFFER_SIZE		(BLKS_PER_BUF*PAGE_CACHE_SIZE)
-
-static unsigned char read_buffers[READ_BUFFERS][BUFFER_SIZE];
-static unsigned buffer_blocknr[READ_BUFFERS];
-static struct super_block * buffer_dev[READ_BUFFERS];
-static int next_buffer;
-
-/*
- * Returns a pointer to a buffer containing at least LEN bytes of
- * filesystem starting at byte offset OFFSET into the filesystem.
- */
-static void *cramfs_read(struct super_block *sb, unsigned int offset, unsigned int len)
-{
-	struct address_space *mapping = sb->s_bdev->bd_inode->i_mapping;
-	struct page *pages[BLKS_PER_BUF];
-	unsigned i, blocknr, buffer;
-	unsigned long devsize;
-	char *data;
-
-	if (!len)
-		return NULL;
-	blocknr = offset >> PAGE_CACHE_SHIFT;
-	offset &= PAGE_CACHE_SIZE - 1;
-
-	/* Check if an existing buffer already has the data.. */
-	for (i = 0; i < READ_BUFFERS; i++) {
-		unsigned int blk_offset;
-
-		if (buffer_dev[i] != sb)
-			continue;
-		if (blocknr < buffer_blocknr[i])
-			continue;
-		blk_offset = (blocknr - buffer_blocknr[i]) << PAGE_CACHE_SHIFT;
-		blk_offset += offset;
-		if (blk_offset + len > BUFFER_SIZE)
-			continue;
-		return read_buffers[i] + blk_offset;
-	}
-
-	devsize = mapping->host->i_size >> PAGE_CACHE_SHIFT;
-
-	/* Ok, read in BLKS_PER_BUF pages completely first. */
-	for (i = 0; i < BLKS_PER_BUF; i++) {
-		struct page *page = NULL;
-
-		if (blocknr + i < devsize) {
-			page = read_mapping_page_async(mapping, blocknr + i,
-									NULL);
-			/* synchronous error? */
-			if (IS_ERR(page))
-				page = NULL;
-		}
-		pages[i] = page;
-	}
-
-	for (i = 0; i < BLKS_PER_BUF; i++) {
-		struct page *page = pages[i];
-		if (page) {
-			wait_on_page_locked(page);
-			if (!PageUptodate(page)) {
-				/* asynchronous error */
-				page_cache_release(page);
-				pages[i] = NULL;
-			}
-		}
-	}
-
-	buffer = next_buffer;
-	next_buffer = NEXT_BUFFER(buffer);
-	buffer_blocknr[buffer] = blocknr;
-	buffer_dev[buffer] = sb;
-
-	data = read_buffers[buffer];
-	for (i = 0; i < BLKS_PER_BUF; i++) {
-		struct page *page = pages[i];
-		if (page) {
-			memcpy(data, kmap(page), PAGE_CACHE_SIZE);
-			kunmap(page);
-			page_cache_release(page);
-		} else
-			memset(data, 0, PAGE_CACHE_SIZE);
-		data += PAGE_CACHE_SIZE;
-	}
-	return read_buffers[buffer] + offset;
-}
-
-static void cramfs_put_super(struct super_block *sb)
-{
-	kfree(sb->s_fs_info);
-	sb->s_fs_info = NULL;
-}
-
-static int cramfs_remount(struct super_block *sb, int *flags, char *data)
-{
-	*flags |= MS_RDONLY;
-	return 0;
-}
-
-static int cramfs_fill_super(struct super_block *sb, void *data, int silent)
-{
-	int i;
-	struct cramfs_super super;
-	unsigned long root_offset;
-	struct cramfs_sb_info *sbi;
-	struct inode *root;
-
-	sb->s_flags |= MS_RDONLY;
-
-	sbi = kzalloc(sizeof(struct cramfs_sb_info), GFP_KERNEL);
-	if (!sbi)
-		return -ENOMEM;
-	sb->s_fs_info = sbi;
-
-	/* Invalidate the read buffers on mount: think disk change.. */
-	mutex_lock(&read_mutex);
-	for (i = 0; i < READ_BUFFERS; i++)
-		buffer_blocknr[i] = -1;
-
-	/* Read the first block and get the superblock from it */
-	memcpy(&super, cramfs_read(sb, 0, sizeof(super)), sizeof(super));
-	mutex_unlock(&read_mutex);
-
-	/* Do sanity checks on the superblock */
-	if (super.magic != CRAMFS_MAGIC) {
-		/* check for wrong endianness */
-		if (super.magic == CRAMFS_MAGIC_WEND) {
-			if (!silent)
-				printk(KERN_ERR "cramfs: wrong endianness\n");
-			goto out;
-		}
-
-		/* check at 512 byte offset */
-		mutex_lock(&read_mutex);
-		memcpy(&super, cramfs_read(sb, 512, sizeof(super)), sizeof(super));
-		mutex_unlock(&read_mutex);
-		if (super.magic != CRAMFS_MAGIC) {
-			if (super.magic == CRAMFS_MAGIC_WEND && !silent)
-				printk(KERN_ERR "cramfs: wrong endianness\n");
-			else if (!silent)
-				printk(KERN_ERR "cramfs: wrong magic\n");
-			goto out;
-		}
-	}
-
-	/* get feature flags first */
-	if (super.flags & ~CRAMFS_SUPPORTED_FLAGS) {
-		printk(KERN_ERR "cramfs: unsupported filesystem features\n");
-		goto out;
-	}
-
-	/* Check that the root inode is in a sane state */
-	if (!S_ISDIR(super.root.mode)) {
-		printk(KERN_ERR "cramfs: root is not a directory\n");
-		goto out;
-	}
-	/* correct strange, hard-coded permissions of mkcramfs */
-	super.root.mode |= (S_IRUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH);
-
-	root_offset = super.root.offset << 2;
-	if (super.flags & CRAMFS_FLAG_FSID_VERSION_2) {
-		sbi->size=super.size;
-		sbi->blocks=super.fsid.blocks;
-		sbi->files=super.fsid.files;
-	} else {
-		sbi->size=1<<28;
-		sbi->blocks=0;
-		sbi->files=0;
-	}
-	sbi->magic=super.magic;
-	sbi->flags=super.flags;
-	if (root_offset == 0)
-		printk(KERN_INFO "cramfs: empty filesystem");
-	else if (!(super.flags & CRAMFS_FLAG_SHIFTED_ROOT_OFFSET) &&
-		 ((root_offset != sizeof(struct cramfs_super)) &&
-		  (root_offset != 512 + sizeof(struct cramfs_super))))
-	{
-		printk(KERN_ERR "cramfs: bad root offset %lu\n", root_offset);
-		goto out;
-	}
-
-	/* Set it all up.. */
-	sb->s_op = &cramfs_ops;
-	root = get_cramfs_inode(sb, &super.root, 0);
-	if (IS_ERR(root))
-		goto out;
-	sb->s_root = d_make_root(root);
-	if (!sb->s_root)
-		goto out;
-	return 0;
-out:
-	kfree(sbi);
-	sb->s_fs_info = NULL;
-	return -EINVAL;
-}
-
-static int cramfs_statfs(struct dentry *dentry, struct kstatfs *buf)
-{
-	struct super_block *sb = dentry->d_sb;
-	u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
-
-	buf->f_type = CRAMFS_MAGIC;
-	buf->f_bsize = PAGE_CACHE_SIZE;
-	buf->f_blocks = CRAMFS_SB(sb)->blocks;
-	buf->f_bfree = 0;
-	buf->f_bavail = 0;
-	buf->f_files = CRAMFS_SB(sb)->files;
-	buf->f_ffree = 0;
-	buf->f_fsid.val[0] = (u32)id;
-	buf->f_fsid.val[1] = (u32)(id >> 32);
-	buf->f_namelen = CRAMFS_MAXPATHLEN;
-	return 0;
-}
-
-/*
- * Read a cramfs directory entry.
- */
-static int cramfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
-{
-	struct inode *inode = filp->f_path.dentry->d_inode;
-	struct super_block *sb = inode->i_sb;
-	char *buf;
-	unsigned int offset;
-	int copied;
-
-	/* Offset within the thing. */
-	offset = filp->f_pos;
-	if (offset >= inode->i_size)
-		return 0;
-	/* Directory entries are always 4-byte aligned */
-	if (offset & 3)
-		return -EINVAL;
-
-	buf = kmalloc(CRAMFS_MAXPATHLEN, GFP_KERNEL);
-	if (!buf)
-		return -ENOMEM;
-
-	copied = 0;
-	while (offset < inode->i_size) {
-		struct cramfs_inode *de;
-		unsigned long nextoffset;
-		char *name;
-		ino_t ino;
-		umode_t mode;
-		int namelen, error;
-
-		mutex_lock(&read_mutex);
-		de = cramfs_read(sb, OFFSET(inode) + offset, sizeof(*de)+CRAMFS_MAXPATHLEN);
-		name = (char *)(de+1);
-
-		/*
-		 * Namelengths on disk are shifted by two
-		 * and the name padded out to 4-byte boundaries
-		 * with zeroes.
-		 */
-		namelen = de->namelen << 2;
-		memcpy(buf, name, namelen);
-		ino = cramino(de, OFFSET(inode) + offset);
-		mode = de->mode;
-		mutex_unlock(&read_mutex);
-		nextoffset = offset + sizeof(*de) + namelen;
-		for (;;) {
-			if (!namelen) {
-				kfree(buf);
-				return -EIO;
-			}
-			if (buf[namelen-1])
-				break;
-			namelen--;
-		}
-		error = filldir(dirent, buf, namelen, offset, ino, mode >> 12);
-		if (error)
-			break;
-
-		offset = nextoffset;
-		filp->f_pos = offset;
-		copied++;
-	}
-	kfree(buf);
-	return 0;
-}
-
-/*
- * Lookup and fill in the inode data..
- */
-static struct dentry * cramfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
-{
-	unsigned int offset = 0;
-	struct inode *inode = NULL;
-	int sorted;
-
-	mutex_lock(&read_mutex);
-	sorted = CRAMFS_SB(dir->i_sb)->flags & CRAMFS_FLAG_SORTED_DIRS;
-	while (offset < dir->i_size) {
-		struct cramfs_inode *de;
-		char *name;
-		int namelen, retval;
-		int dir_off = OFFSET(dir) + offset;
-
-		de = cramfs_read(dir->i_sb, dir_off, sizeof(*de)+CRAMFS_MAXPATHLEN);
-		name = (char *)(de+1);
-
-		/* Try to take advantage of sorted directories */
-		if (sorted && (dentry->d_name.name[0] < name[0]))
-			break;
-
-		namelen = de->namelen << 2;
-		offset += sizeof(*de) + namelen;
-
-		/* Quick check that the name is roughly the right length */
-		if (((dentry->d_name.len + 3) & ~3) != namelen)
-			continue;
-
-		for (;;) {
-			if (!namelen) {
-				inode = ERR_PTR(-EIO);
-				goto out;
-			}
-			if (name[namelen-1])
-				break;
-			namelen--;
-		}
-		if (namelen != dentry->d_name.len)
-			continue;
-		retval = memcmp(dentry->d_name.name, name, namelen);
-		if (retval > 0)
-			continue;
-		if (!retval) {
-			inode = get_cramfs_inode(dir->i_sb, de, dir_off);
-			break;
-		}
-		/* else (retval < 0) */
-		if (sorted)
-			break;
-	}
-out:
-	mutex_unlock(&read_mutex);
-	if (IS_ERR(inode))
-		return ERR_CAST(inode);
-	d_add(dentry, inode);
-	return NULL;
-}
-
-static int cramfs_readpage(struct file *file, struct page * page)
-{
-	struct inode *inode = page->mapping->host;
-	u32 maxblock;
-	int bytes_filled;
-	void *pgdata;
-
-	maxblock = (inode->i_size + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
-	bytes_filled = 0;
-	pgdata = kmap(page);
-
-	if (page->index < maxblock) {
-		struct super_block *sb = inode->i_sb;
-		u32 blkptr_offset = OFFSET(inode) + page->index*4;
-		u32 start_offset, compr_len;
-
-		start_offset = OFFSET(inode) + maxblock*4;
-		mutex_lock(&read_mutex);
-		if (page->index)
-			start_offset = *(u32 *) cramfs_read(sb, blkptr_offset-4,
-				4);
-		compr_len = (*(u32 *) cramfs_read(sb, blkptr_offset, 4) -
-			start_offset);
-		mutex_unlock(&read_mutex);
-
-		if (compr_len == 0)
-			; /* hole */
-		else if (unlikely(compr_len > (PAGE_CACHE_SIZE << 1))) {
-			pr_err("cramfs: bad compressed blocksize %u\n",
-				compr_len);
-			goto err;
-		} else {
-			mutex_lock(&read_mutex);
-			bytes_filled = cramfs_uncompress_block(pgdata,
-				 PAGE_CACHE_SIZE,
-				 cramfs_read(sb, start_offset, compr_len),
-				 compr_len);
-			mutex_unlock(&read_mutex);
-			if (unlikely(bytes_filled < 0))
-				goto err;
-		}
-	}
-
-	memset(pgdata + bytes_filled, 0, PAGE_CACHE_SIZE - bytes_filled);
-	flush_dcache_page(page);
-	kunmap(page);
-	SetPageUptodate(page);
-	unlock_page(page);
-	return 0;
-
-err:
-	kunmap(page);
-	ClearPageUptodate(page);
-	SetPageError(page);
-	unlock_page(page);
-	return 0;
-}
-
-static const struct address_space_operations cramfs_aops = {
-	.readpage = cramfs_readpage
-};
-
-/*
- * Our operations:
- */
-
-/*
- * A directory can only readdir
- */
-static const struct file_operations cramfs_directory_operations = {
-	.llseek		= generic_file_llseek,
-	.read		= generic_read_dir,
-	.readdir	= cramfs_readdir,
-};
-
-static const struct inode_operations cramfs_dir_inode_operations = {
-	.lookup		= cramfs_lookup,
-};
-
-static const struct super_operations cramfs_ops = {
-	.put_super	= cramfs_put_super,
-	.remount_fs	= cramfs_remount,
-	.statfs		= cramfs_statfs,
-};
-
-static struct dentry *cramfs_mount(struct file_system_type *fs_type,
-	int flags, const char *dev_name, void *data)
-{
-	return mount_bdev(fs_type, flags, dev_name, data, cramfs_fill_super);
-}
-
-static struct file_system_type cramfs_fs_type = {
-	.owner		= THIS_MODULE,
-	.name		= "cramfs",
-	.mount		= cramfs_mount,
-	.kill_sb	= kill_block_super,
-	.fs_flags	= FS_REQUIRES_DEV,
-};
-
-static int __init init_cramfs_fs(void)
-{
-	int rv;
-
-	rv = cramfs_uncompress_init();
-	if (rv < 0)
-		return rv;
-	rv = register_filesystem(&cramfs_fs_type);
-	if (rv < 0)
-		cramfs_uncompress_exit();
-	return rv;
-}
-
-static void __exit exit_cramfs_fs(void)
-{
-	cramfs_uncompress_exit();
-	unregister_filesystem(&cramfs_fs_type);
-}
-
-module_init(init_cramfs_fs)
-module_exit(exit_cramfs_fs)
-MODULE_LICENSE("GPL");