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, 459 deletions

diff --git a/ANDROID_3.4.5/fs/gfs2/meta_io.c b/ANDROID_3.4.5/fs/gfs2/meta_io.c
deleted file mode 100644
index 181586e6..00000000
--- a/ANDROID_3.4.5/fs/gfs2/meta_io.c
+++ /dev/null
@@ -1,459 +0,0 @@
-/*
- * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
- * Copyright (C) 2004-2008 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
- */
-
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/completion.h>
-#include <linux/buffer_head.h>
-#include <linux/mm.h>
-#include <linux/pagemap.h>
-#include <linux/writeback.h>
-#include <linux/swap.h>
-#include <linux/delay.h>
-#include <linux/bio.h>
-#include <linux/gfs2_ondisk.h>
-
-#include "gfs2.h"
-#include "incore.h"
-#include "glock.h"
-#include "glops.h"
-#include "inode.h"
-#include "log.h"
-#include "lops.h"
-#include "meta_io.h"
-#include "rgrp.h"
-#include "trans.h"
-#include "util.h"
-#include "trace_gfs2.h"
-
-static int gfs2_aspace_writepage(struct page *page, struct writeback_control *wbc)
-{
-	struct buffer_head *bh, *head;
-	int nr_underway = 0;
-	int write_op = REQ_META | REQ_PRIO |
-		(wbc->sync_mode == WB_SYNC_ALL ? WRITE_SYNC : WRITE);
-
-	BUG_ON(!PageLocked(page));
-	BUG_ON(!page_has_buffers(page));
-
-	head = page_buffers(page);
-	bh = head;
-
-	do {
-		if (!buffer_mapped(bh))
-			continue;
-		/*
-		 * If it's a fully non-blocking write attempt and we cannot
-		 * lock the buffer then redirty the page.  Note that this can
-		 * potentially cause a busy-wait loop from pdflush and kswapd
-		 * activity, but those code paths have their own higher-level
-		 * throttling.
-		 */
-		if (wbc->sync_mode != WB_SYNC_NONE) {
-			lock_buffer(bh);
-		} else if (!trylock_buffer(bh)) {
-			redirty_page_for_writepage(wbc, page);
-			continue;
-		}
-		if (test_clear_buffer_dirty(bh)) {
-			mark_buffer_async_write(bh);
-		} else {
-			unlock_buffer(bh);
-		}
-	} while ((bh = bh->b_this_page) != head);
-
-	/*
-	 * The page and its buffers are protected by PageWriteback(), so we can
-	 * drop the bh refcounts early.
-	 */
-	BUG_ON(PageWriteback(page));
-	set_page_writeback(page);
-
-	do {
-		struct buffer_head *next = bh->b_this_page;
-		if (buffer_async_write(bh)) {
-			submit_bh(write_op, bh);
-			nr_underway++;
-		}
-		bh = next;
-	} while (bh != head);
-	unlock_page(page);
-
-	if (nr_underway == 0)
-		end_page_writeback(page);
-
-	return 0;
-}
-
-const struct address_space_operations gfs2_meta_aops = {
-	.writepage = gfs2_aspace_writepage,
-	.releasepage = gfs2_releasepage,
-};
-
-/**
- * gfs2_meta_sync - Sync all buffers associated with a glock
- * @gl: The glock
- *
- */
-
-void gfs2_meta_sync(struct gfs2_glock *gl)
-{
-	struct address_space *mapping = gfs2_glock2aspace(gl);
-	int error;
-
-	filemap_fdatawrite(mapping);
-	error = filemap_fdatawait(mapping);
-
-	if (error)
-		gfs2_io_error(gl->gl_sbd);
-}
-
-/**
- * gfs2_getbuf - Get a buffer with a given address space
- * @gl: the glock
- * @blkno: the block number (filesystem scope)
- * @create: 1 if the buffer should be created
- *
- * Returns: the buffer
- */
-
-struct buffer_head *gfs2_getbuf(struct gfs2_glock *gl, u64 blkno, int create)
-{
-	struct address_space *mapping = gfs2_glock2aspace(gl);
-	struct gfs2_sbd *sdp = gl->gl_sbd;
-	struct page *page;
-	struct buffer_head *bh;
-	unsigned int shift;
-	unsigned long index;
-	unsigned int bufnum;
-
-	shift = PAGE_CACHE_SHIFT - sdp->sd_sb.sb_bsize_shift;
-	index = blkno >> shift;             /* convert block to page */
-	bufnum = blkno - (index << shift);  /* block buf index within page */
-
-	if (create) {
-		for (;;) {
-			page = grab_cache_page(mapping, index);
-			if (page)
-				break;
-			yield();
-		}
-	} else {
-		page = find_lock_page(mapping, index);
-		if (!page)
-			return NULL;
-	}
-
-	if (!page_has_buffers(page))
-		create_empty_buffers(page, sdp->sd_sb.sb_bsize, 0);
-
-	/* Locate header for our buffer within our page */
-	for (bh = page_buffers(page); bufnum--; bh = bh->b_this_page)
-		/* Do nothing */;
-	get_bh(bh);
-
-	if (!buffer_mapped(bh))
-		map_bh(bh, sdp->sd_vfs, blkno);
-
-	unlock_page(page);
-	mark_page_accessed(page);
-	page_cache_release(page);
-
-	return bh;
-}
-
-static void meta_prep_new(struct buffer_head *bh)
-{
-	struct gfs2_meta_header *mh = (struct gfs2_meta_header *)bh->b_data;
-
-	lock_buffer(bh);
-	clear_buffer_dirty(bh);
-	set_buffer_uptodate(bh);
-	unlock_buffer(bh);
-
-	mh->mh_magic = cpu_to_be32(GFS2_MAGIC);
-}
-
-/**
- * gfs2_meta_new - Get a block
- * @gl: The glock associated with this block
- * @blkno: The block number
- *
- * Returns: The buffer
- */
-
-struct buffer_head *gfs2_meta_new(struct gfs2_glock *gl, u64 blkno)
-{
-	struct buffer_head *bh;
-	bh = gfs2_getbuf(gl, blkno, CREATE);
-	meta_prep_new(bh);
-	return bh;
-}
-
-/**
- * gfs2_meta_read - Read a block from disk
- * @gl: The glock covering the block
- * @blkno: The block number
- * @flags: flags
- * @bhp: the place where the buffer is returned (NULL on failure)
- *
- * Returns: errno
- */
-
-int gfs2_meta_read(struct gfs2_glock *gl, u64 blkno, int flags,
-		   struct buffer_head **bhp)
-{
-	struct gfs2_sbd *sdp = gl->gl_sbd;
-	struct buffer_head *bh;
-
-	if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
-		return -EIO;
-
-	*bhp = bh = gfs2_getbuf(gl, blkno, CREATE);
-
-	lock_buffer(bh);
-	if (buffer_uptodate(bh)) {
-		unlock_buffer(bh);
-		return 0;
-	}
-	bh->b_end_io = end_buffer_read_sync;
-	get_bh(bh);
-	submit_bh(READ_SYNC | REQ_META | REQ_PRIO, bh);
-	if (!(flags & DIO_WAIT))
-		return 0;
-
-	wait_on_buffer(bh);
-	if (unlikely(!buffer_uptodate(bh))) {
-		struct gfs2_trans *tr = current->journal_info;
-		if (tr && tr->tr_touched)
-			gfs2_io_error_bh(sdp, bh);
-		brelse(bh);
-		return -EIO;
-	}
-
-	return 0;
-}
-
-/**
- * gfs2_meta_wait - Reread a block from disk
- * @sdp: the filesystem
- * @bh: The block to wait for
- *
- * Returns: errno
- */
-
-int gfs2_meta_wait(struct gfs2_sbd *sdp, struct buffer_head *bh)
-{
-	if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
-		return -EIO;
-
-	wait_on_buffer(bh);
-
-	if (!buffer_uptodate(bh)) {
-		struct gfs2_trans *tr = current->journal_info;
-		if (tr && tr->tr_touched)
-			gfs2_io_error_bh(sdp, bh);
-		return -EIO;
-	}
-	if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
-		return -EIO;
-
-	return 0;
-}
-
-/**
- * gfs2_attach_bufdata - attach a struct gfs2_bufdata structure to a buffer
- * @gl: the glock the buffer belongs to
- * @bh: The buffer to be attached to
- * @meta: Flag to indicate whether its metadata or not
- */
-
-void gfs2_attach_bufdata(struct gfs2_glock *gl, struct buffer_head *bh,
-			 int meta)
-{
-	struct gfs2_bufdata *bd;
-
-	if (meta)
-		lock_page(bh->b_page);
-
-	if (bh->b_private) {
-		if (meta)
-			unlock_page(bh->b_page);
-		return;
-	}
-
-	bd = kmem_cache_zalloc(gfs2_bufdata_cachep, GFP_NOFS | __GFP_NOFAIL);
-	bd->bd_bh = bh;
-	bd->bd_gl = gl;
-
-	INIT_LIST_HEAD(&bd->bd_list_tr);
-	if (meta)
-		lops_init_le(&bd->bd_le, &gfs2_buf_lops);
-	else
-		lops_init_le(&bd->bd_le, &gfs2_databuf_lops);
-	bh->b_private = bd;
-
-	if (meta)
-		unlock_page(bh->b_page);
-}
-
-void gfs2_remove_from_journal(struct buffer_head *bh, struct gfs2_trans *tr, int meta)
-{
-	struct address_space *mapping = bh->b_page->mapping;
-	struct gfs2_sbd *sdp = gfs2_mapping2sbd(mapping);
-	struct gfs2_bufdata *bd = bh->b_private;
-
-	if (test_clear_buffer_pinned(bh)) {
-		trace_gfs2_pin(bd, 0);
-		atomic_dec(&sdp->sd_log_pinned);
-		list_del_init(&bd->bd_le.le_list);
-		if (meta) {
-			gfs2_assert_warn(sdp, sdp->sd_log_num_buf);
-			sdp->sd_log_num_buf--;
-			tr->tr_num_buf_rm++;
-		} else {
-			gfs2_assert_warn(sdp, sdp->sd_log_num_databuf);
-			sdp->sd_log_num_databuf--;
-			tr->tr_num_databuf_rm++;
-		}
-		tr->tr_touched = 1;
-		brelse(bh);
-	}
-	if (bd) {
-		spin_lock(&sdp->sd_ail_lock);
-		if (bd->bd_ail) {
-			gfs2_remove_from_ail(bd);
-			bh->b_private = NULL;
-			bd->bd_bh = NULL;
-			bd->bd_blkno = bh->b_blocknr;
-			gfs2_trans_add_revoke(sdp, bd);
-		}
-		spin_unlock(&sdp->sd_ail_lock);
-	}
-	clear_buffer_dirty(bh);
-	clear_buffer_uptodate(bh);
-}
-
-/**
- * gfs2_meta_wipe - make inode's buffers so they aren't dirty/pinned anymore
- * @ip: the inode who owns the buffers
- * @bstart: the first buffer in the run
- * @blen: the number of buffers in the run
- *
- */
-
-void gfs2_meta_wipe(struct gfs2_inode *ip, u64 bstart, u32 blen)
-{
-	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
-	struct buffer_head *bh;
-
-	while (blen) {
-		bh = gfs2_getbuf(ip->i_gl, bstart, NO_CREATE);
-		if (bh) {
-			lock_buffer(bh);
-			gfs2_log_lock(sdp);
-			gfs2_remove_from_journal(bh, current->journal_info, 1);
-			gfs2_log_unlock(sdp);
-			unlock_buffer(bh);
-			brelse(bh);
-		}
-
-		bstart++;
-		blen--;
-	}
-}
-
-/**
- * gfs2_meta_indirect_buffer - Get a metadata buffer
- * @ip: The GFS2 inode
- * @height: The level of this buf in the metadata (indir addr) tree (if any)
- * @num: The block number (device relative) of the buffer
- * @new: Non-zero if we may create a new buffer
- * @bhp: the buffer is returned here
- *
- * Returns: errno
- */
-
-int gfs2_meta_indirect_buffer(struct gfs2_inode *ip, int height, u64 num,
-			      int new, struct buffer_head **bhp)
-{
-	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
-	struct gfs2_glock *gl = ip->i_gl;
-	struct buffer_head *bh;
-	int ret = 0;
-
-	if (new) {
-		BUG_ON(height == 0);
-		bh = gfs2_meta_new(gl, num);
-		gfs2_trans_add_bh(ip->i_gl, bh, 1);
-		gfs2_metatype_set(bh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
-		gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header));
-	} else {
-		u32 mtype = height ? GFS2_METATYPE_IN : GFS2_METATYPE_DI;
-		ret = gfs2_meta_read(gl, num, DIO_WAIT, &bh);
-		if (ret == 0 && gfs2_metatype_check(sdp, bh, mtype)) {
-			brelse(bh);
-			ret = -EIO;
-		}
-	}
-	*bhp = bh;
-	return ret;
-}
-
-/**
- * gfs2_meta_ra - start readahead on an extent of a file
- * @gl: the glock the blocks belong to
- * @dblock: the starting disk block
- * @extlen: the number of blocks in the extent
- *
- * returns: the first buffer in the extent
- */
-
-struct buffer_head *gfs2_meta_ra(struct gfs2_glock *gl, u64 dblock, u32 extlen)
-{
-	struct gfs2_sbd *sdp = gl->gl_sbd;
-	struct buffer_head *first_bh, *bh;
-	u32 max_ra = gfs2_tune_get(sdp, gt_max_readahead) >>
-			  sdp->sd_sb.sb_bsize_shift;
-
-	BUG_ON(!extlen);
-
-	if (max_ra < 1)
-		max_ra = 1;
-	if (extlen > max_ra)
-		extlen = max_ra;
-
-	first_bh = gfs2_getbuf(gl, dblock, CREATE);
-
-	if (buffer_uptodate(first_bh))
-		goto out;
-	if (!buffer_locked(first_bh))
-		ll_rw_block(READ_SYNC | REQ_META, 1, &first_bh);
-
-	dblock++;
-	extlen--;
-
-	while (extlen) {
-		bh = gfs2_getbuf(gl, dblock, CREATE);
-
-		if (!buffer_uptodate(bh) && !buffer_locked(bh))
-			ll_rw_block(READA | REQ_META, 1, &bh);
-		brelse(bh);
-		dblock++;
-		extlen--;
-		if (!buffer_locked(first_bh) && buffer_uptodate(first_bh))
-			goto out;
-	}
-
-	wait_on_buffer(first_bh);
-out:
-	return first_bh;
-}
-