1 files changed, 0 insertions, 285 deletions
diff --git a/fs/logfs/file.c b/fs/logfs/file.c
deleted file mode 100644
index 1db04930ad57..000000000000
--- a/fs/logfs/file.c
+++ /dev/null
@@ -1,285 +0,0 @@
-/*
- * fs/logfs/file.c	- prepare_write, commit_write and friends
- *
- * As should be obvious for Linux kernel code, license is GPLv2
- *
- * Copyright (c) 2005-2008 Joern Engel <joern@logfs.org>
- */
-#include "logfs.h"
-#include <linux/sched.h>
-#include <linux/writeback.h>
-
-static int logfs_write_begin(struct file *file, struct address_space *mapping,
-		loff_t pos, unsigned len, unsigned flags,
-		struct page **pagep, void **fsdata)
-{
-	struct inode *inode = mapping->host;
-	struct page *page;
-	pgoff_t index = pos >> PAGE_SHIFT;
-
-	page = grab_cache_page_write_begin(mapping, index, flags);
-	if (!page)
-		return -ENOMEM;
-	*pagep = page;
-
-	if ((len == PAGE_SIZE) || PageUptodate(page))
-		return 0;
-	if ((pos & PAGE_MASK) >= i_size_read(inode)) {
-		unsigned start = pos & (PAGE_SIZE - 1);
-		unsigned end = start + len;
-
-		/* Reading beyond i_size is simple: memset to zero */
-		zero_user_segments(page, 0, start, end, PAGE_SIZE);
-		return 0;
-	}
-	return logfs_readpage_nolock(page);
-}
-
-static int logfs_write_end(struct file *file, struct address_space *mapping,
-		loff_t pos, unsigned len, unsigned copied, struct page *page,
-		void *fsdata)
-{
-	struct inode *inode = mapping->host;
-	pgoff_t index = page->index;
-	unsigned start = pos & (PAGE_SIZE - 1);
-	unsigned end = start + copied;
-	int ret = 0;
-
-	BUG_ON(PAGE_SIZE != inode->i_sb->s_blocksize);
-	BUG_ON(page->index > I3_BLOCKS);
-
-	if (copied < len) {
-		/*
-		 * Short write of a non-initialized paged.  Just tell userspace
-		 * to retry the entire page.
-		 */
-		if (!PageUptodate(page)) {
-			copied = 0;
-			goto out;
-		}
-	}
-	if (copied == 0)
-		goto out; /* FIXME: do we need to update inode? */
-
-	if (i_size_read(inode) < (index << PAGE_SHIFT) + end) {
-		i_size_write(inode, (index << PAGE_SHIFT) + end);
-		mark_inode_dirty_sync(inode);
-	}
-
-	SetPageUptodate(page);
-	if (!PageDirty(page)) {
-		if (!get_page_reserve(inode, page))
-			__set_page_dirty_nobuffers(page);
-		else
-			ret = logfs_write_buf(inode, page, WF_LOCK);
-	}
-out:
-	unlock_page(page);
-	put_page(page);
-	return ret ? ret : copied;
-}
-
-int logfs_readpage(struct file *file, struct page *page)
-{
-	int ret;
-
-	ret = logfs_readpage_nolock(page);
-	unlock_page(page);
-	return ret;
-}
-
-/* Clear the page's dirty flag in the radix tree. */
-/* TODO: mucking with PageWriteback is silly.  Add a generic function to clear
- * the dirty bit from the radix tree for filesystems that don't have to wait
- * for page writeback to finish (i.e. any compressing filesystem).
- */
-static void clear_radix_tree_dirty(struct page *page)
-{
-	BUG_ON(PagePrivate(page) || page->private);
-	set_page_writeback(page);
-	end_page_writeback(page);
-}
-
-static int __logfs_writepage(struct page *page)
-{
-	struct inode *inode = page->mapping->host;
-	int err;
-
-	err = logfs_write_buf(inode, page, WF_LOCK);
-	if (err)
-		set_page_dirty(page);
-	else
-		clear_radix_tree_dirty(page);
-	unlock_page(page);
-	return err;
-}
-
-static int logfs_writepage(struct page *page, struct writeback_control *wbc)
-{
-	struct inode *inode = page->mapping->host;
-	loff_t i_size = i_size_read(inode);
-	pgoff_t end_index = i_size >> PAGE_SHIFT;
-	unsigned offset;
-	u64 bix;
-	level_t level;
-
-	log_file("logfs_writepage(%lx, %lx, %p)\n", inode->i_ino, page->index,
-			page);
-
-	logfs_unpack_index(page->index, &bix, &level);
-
-	/* Indirect blocks are never truncated */
-	if (level != 0)
-		return __logfs_writepage(page);
-
-	/*
-	 * TODO: everything below is a near-verbatim copy of nobh_writepage().
-	 * The relevant bits should be factored out after logfs is merged.
-	 */
-
-	/* Is the page fully inside i_size? */
-	if (bix < end_index)
-		return __logfs_writepage(page);
-
-	 /* Is the page fully outside i_size? (truncate in progress) */
-	offset = i_size & (PAGE_SIZE-1);
-	if (bix > end_index || offset == 0) {
-		unlock_page(page);
-		return 0; /* don't care */
-	}
-
-	/*
-	 * The page straddles i_size.  It must be zeroed out on each and every
-	 * writepage invokation because it may be mmapped.  "A file is mapped
-	 * in multiples of the page size.  For a file that is not a multiple of
-	 * the  page size, the remaining memory is zeroed when mapped, and
-	 * writes to that region are not written out to the file."
-	 */
-	zero_user_segment(page, offset, PAGE_SIZE);
-	return __logfs_writepage(page);
-}
-
-static void logfs_invalidatepage(struct page *page, unsigned int offset,
-				 unsigned int length)
-{
-	struct logfs_block *block = logfs_block(page);
-
-	if (block->reserved_bytes) {
-		struct super_block *sb = page->mapping->host->i_sb;
-		struct logfs_super *super = logfs_super(sb);
-
-		super->s_dirty_pages -= block->reserved_bytes;
-		block->ops->free_block(sb, block);
-		BUG_ON(bitmap_weight(block->alias_map, LOGFS_BLOCK_FACTOR));
-	} else
-		move_page_to_btree(page);
-	BUG_ON(PagePrivate(page) || page->private);
-}
-
-static int logfs_releasepage(struct page *page, gfp_t only_xfs_uses_this)
-{
-	return 0; /* None of these are easy to release */
-}
-
-
-long logfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
-{
-	struct inode *inode = file_inode(file);
-	struct logfs_inode *li = logfs_inode(inode);
-	unsigned int oldflags, flags;
-	int err;
-
-	switch (cmd) {
-	case FS_IOC_GETFLAGS:
-		flags = li->li_flags & LOGFS_FL_USER_VISIBLE;
-		return put_user(flags, (int __user *)arg);
-	case FS_IOC_SETFLAGS:
-		if (IS_RDONLY(inode))
-			return -EROFS;
-
-		if (!inode_owner_or_capable(inode))
-			return -EACCES;
-
-		err = get_user(flags, (int __user *)arg);
-		if (err)
-			return err;
-
-		inode_lock(inode);
-		oldflags = li->li_flags;
-		flags &= LOGFS_FL_USER_MODIFIABLE;
-		flags |= oldflags & ~LOGFS_FL_USER_MODIFIABLE;
-		li->li_flags = flags;
-		inode_unlock(inode);
-
-		inode->i_ctime = current_time(inode);
-		mark_inode_dirty_sync(inode);
-		return 0;
-
-	default:
-		return -ENOTTY;
-	}
-}
-
-int logfs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
-{
-	struct super_block *sb = file->f_mapping->host->i_sb;
-	struct inode *inode = file->f_mapping->host;
-	int ret;
-
-	ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
-	if (ret)
-		return ret;
-
-	inode_lock(inode);
-	logfs_get_wblocks(sb, NULL, WF_LOCK);
-	logfs_write_anchor(sb);
-	logfs_put_wblocks(sb, NULL, WF_LOCK);
-	inode_unlock(inode);
-
-	return 0;
-}
-
-static int logfs_setattr(struct dentry *dentry, struct iattr *attr)
-{
-	struct inode *inode = d_inode(dentry);
-	int err = 0;
-
-	err = setattr_prepare(dentry, attr);
-	if (err)
-		return err;
-
-	if (attr->ia_valid & ATTR_SIZE) {
-		err = logfs_truncate(inode, attr->ia_size);
-		if (err)
-			return err;
-	}
-
-	setattr_copy(inode, attr);
-	mark_inode_dirty(inode);
-	return 0;
-}
-
-const struct inode_operations logfs_reg_iops = {
-	.setattr	= logfs_setattr,
-};
-
-const struct file_operations logfs_reg_fops = {
-	.read_iter	= generic_file_read_iter,
-	.write_iter	= generic_file_write_iter,
-	.fsync		= logfs_fsync,
-	.unlocked_ioctl	= logfs_ioctl,
-	.llseek		= generic_file_llseek,
-	.mmap		= generic_file_readonly_mmap,
-	.open		= generic_file_open,
-};
-
-const struct address_space_operations logfs_reg_aops = {
-	.invalidatepage	= logfs_invalidatepage,
-	.readpage	= logfs_readpage,
-	.releasepage	= logfs_releasepage,
-	.set_page_dirty	= __set_page_dirty_nobuffers,
-	.writepage	= logfs_writepage,
-	.writepages	= generic_writepages,
-	.write_begin	= logfs_write_begin,
-	.write_end	= logfs_write_end,
-};