1 files changed, 0 insertions, 459 deletions

diff --git a/fs/gfs2/unlinked.c b/fs/gfs2/unlinked.c
deleted file mode 100644
index b92d73002055..000000000000
--- a/fs/gfs2/unlinked.c
+++ /dev/null
@@ -1,459 +0,0 @@
-/*
- * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
- * Copyright (C) 2004-2006 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 v.2.
- */
-
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/completion.h>
-#include <linux/buffer_head.h>
-#include <linux/kthread.h>
-#include <linux/gfs2_ondisk.h>
-
-#include "gfs2.h"
-#include "lm_interface.h"
-#include "incore.h"
-#include "bmap.h"
-#include "inode.h"
-#include "meta_io.h"
-#include "trans.h"
-#include "unlinked.h"
-#include "util.h"
-
-static int munge_ondisk(struct gfs2_sbd *sdp, unsigned int slot,
-			struct gfs2_unlinked_tag *ut)
-{
-	struct gfs2_inode *ip = sdp->sd_ut_inode->u.generic_ip;
-	unsigned int block, offset;
-	uint64_t dblock;
-	int new = 0;
-	struct buffer_head *bh;
-	int error;
-	int boundary;
-
-	block = slot / sdp->sd_ut_per_block;
-	offset = slot % sdp->sd_ut_per_block;
-
-	error = gfs2_block_map(ip->i_vnode, block, &new, &dblock, &boundary);
-	if (error)
-		return error;
-	error = gfs2_meta_read(ip->i_gl, dblock, DIO_START | DIO_WAIT, &bh);
-	if (error)
-		return error;
-	if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_UT)) {
-		error = -EIO;
-		goto out;
-	}
-
-	mutex_lock(&sdp->sd_unlinked_mutex);
-	gfs2_trans_add_bh(ip->i_gl, bh, 1);
-	gfs2_unlinked_tag_out(ut, bh->b_data +
-				  sizeof(struct gfs2_meta_header) +
-				  offset * sizeof(struct gfs2_unlinked_tag));
-	mutex_unlock(&sdp->sd_unlinked_mutex);
-
- out:
-	brelse(bh);
-
-	return error;
-}
-
-static void ul_hash(struct gfs2_sbd *sdp, struct gfs2_unlinked *ul)
-{
-	spin_lock(&sdp->sd_unlinked_spin);
-	list_add(&ul->ul_list, &sdp->sd_unlinked_list);
-	gfs2_assert(sdp, ul->ul_count);
-	ul->ul_count++;
-	atomic_inc(&sdp->sd_unlinked_count);
-	spin_unlock(&sdp->sd_unlinked_spin);
-}
-
-static void ul_unhash(struct gfs2_sbd *sdp, struct gfs2_unlinked *ul)
-{
-	spin_lock(&sdp->sd_unlinked_spin);
-	list_del_init(&ul->ul_list);
-	gfs2_assert(sdp, ul->ul_count > 1);
-	ul->ul_count--;
-	gfs2_assert_warn(sdp, atomic_read(&sdp->sd_unlinked_count) > 0);
-	atomic_dec(&sdp->sd_unlinked_count);
-	spin_unlock(&sdp->sd_unlinked_spin);
-}
-
-static struct gfs2_unlinked *ul_fish(struct gfs2_sbd *sdp)
-{
-	struct list_head *head;
-	struct gfs2_unlinked *ul;
-	int found = 0;
-
-	if (sdp->sd_vfs->s_flags & MS_RDONLY)
-		return NULL;
-
-	spin_lock(&sdp->sd_unlinked_spin);
-
-	head = &sdp->sd_unlinked_list;
-
-	list_for_each_entry(ul, head, ul_list) {
-		if (test_bit(ULF_LOCKED, &ul->ul_flags))
-			continue;
-
-		list_move_tail(&ul->ul_list, head);
-		ul->ul_count++;
-		set_bit(ULF_LOCKED, &ul->ul_flags);
-		found = 1;
-
-		break;
-	}
-
-	if (!found)
-		ul = NULL;
-
-	spin_unlock(&sdp->sd_unlinked_spin);
-
-	return ul;
-}
-
-/**
- * enforce_limit - limit the number of inodes waiting to be deallocated
- * @sdp: the filesystem
- *
- * Returns: errno
- */
-
-static void enforce_limit(struct gfs2_sbd *sdp)
-{
-	unsigned int tries = 0, min = 0;
-	int error;
-
-	if (atomic_read(&sdp->sd_unlinked_count) <
-	    gfs2_tune_get(sdp, gt_ilimit))
-		return;
-
-	tries = gfs2_tune_get(sdp, gt_ilimit_tries);
-	min = gfs2_tune_get(sdp, gt_ilimit_min);
-
-	while (tries--) {
-		struct gfs2_unlinked *ul = ul_fish(sdp);
-		if (!ul)
-			break;
-		error = gfs2_inode_dealloc(sdp, ul);
-		gfs2_unlinked_put(sdp, ul);
-
-		if (!error) {
-			if (!--min)
-				break;
-		} else if (error != 1)
-			break;
-	}
-}
-
-static struct gfs2_unlinked *ul_alloc(struct gfs2_sbd *sdp)
-{
-	struct gfs2_unlinked *ul;
-
-	ul = kzalloc(sizeof(struct gfs2_unlinked), GFP_KERNEL);
-	if (ul) {
-		INIT_LIST_HEAD(&ul->ul_list);
-		ul->ul_count = 1;
-		set_bit(ULF_LOCKED, &ul->ul_flags);
-	}
-
-	return ul;
-}
-
-int gfs2_unlinked_get(struct gfs2_sbd *sdp, struct gfs2_unlinked **ul)
-{
-	unsigned int c, o = 0, b;
-	unsigned char byte = 0;
-
-	enforce_limit(sdp);
-
-	*ul = ul_alloc(sdp);
-	if (!*ul)
-		return -ENOMEM;
-
-	spin_lock(&sdp->sd_unlinked_spin);
-
-	for (c = 0; c < sdp->sd_unlinked_chunks; c++)
-		for (o = 0; o < PAGE_SIZE; o++) {
-			byte = sdp->sd_unlinked_bitmap[c][o];
-			if (byte != 0xFF)
-				goto found;
-		}
-
-	goto fail;
-
-found:
-	for (b = 0; b < 8; b++)
-		if (!(byte & (1 << b)))
-			break;
-	(*ul)->ul_slot = c * (8 * PAGE_SIZE) + o * 8 + b;
-
-	if ((*ul)->ul_slot >= sdp->sd_unlinked_slots)
-		goto fail;
-
-	sdp->sd_unlinked_bitmap[c][o] |= 1 << b;
-
-	spin_unlock(&sdp->sd_unlinked_spin);
-
-	return 0;
-
-fail:
-	spin_unlock(&sdp->sd_unlinked_spin);
-	kfree(*ul);
-	return -ENOSPC;
-}
-
-void gfs2_unlinked_put(struct gfs2_sbd *sdp, struct gfs2_unlinked *ul)
-{
-	gfs2_assert_warn(sdp, test_and_clear_bit(ULF_LOCKED, &ul->ul_flags));
-
-	spin_lock(&sdp->sd_unlinked_spin);
-	gfs2_assert(sdp, ul->ul_count);
-	ul->ul_count--;
-	if (!ul->ul_count) {
-		gfs2_icbit_munge(sdp, sdp->sd_unlinked_bitmap, ul->ul_slot, 0);
-		spin_unlock(&sdp->sd_unlinked_spin);
-		kfree(ul);
-	} else
-		spin_unlock(&sdp->sd_unlinked_spin);
-}
-
-int gfs2_unlinked_ondisk_add(struct gfs2_sbd *sdp, struct gfs2_unlinked *ul)
-{
-	int error;
-
-	gfs2_assert_warn(sdp, test_bit(ULF_LOCKED, &ul->ul_flags));
-	gfs2_assert_warn(sdp, list_empty(&ul->ul_list));
-
-	error = munge_ondisk(sdp, ul->ul_slot, &ul->ul_ut);
-	if (!error)
-		ul_hash(sdp, ul);
-
-	return error;
-}
-
-int gfs2_unlinked_ondisk_munge(struct gfs2_sbd *sdp, struct gfs2_unlinked *ul)
-{
-	int error;
-
-	gfs2_assert_warn(sdp, test_bit(ULF_LOCKED, &ul->ul_flags));
-	gfs2_assert_warn(sdp, !list_empty(&ul->ul_list));
-
-	error = munge_ondisk(sdp, ul->ul_slot, &ul->ul_ut);
-
-	return error;
-}
-
-int gfs2_unlinked_ondisk_rm(struct gfs2_sbd *sdp, struct gfs2_unlinked *ul)
-{
-	struct gfs2_unlinked_tag ut;
-	int error;
-
-	gfs2_assert_warn(sdp, test_bit(ULF_LOCKED, &ul->ul_flags));
-	gfs2_assert_warn(sdp, !list_empty(&ul->ul_list));
-
-	memset(&ut, 0, sizeof(struct gfs2_unlinked_tag));
-
-	error = munge_ondisk(sdp, ul->ul_slot, &ut);
-	if (error)
-		return error;
-
-	ul_unhash(sdp, ul);
-
-	return 0;
-}
-
-/**
- * gfs2_unlinked_dealloc - Go through the list of inodes to be deallocated
- * @sdp: the filesystem
- *
- * Returns: errno
- */
-
-int gfs2_unlinked_dealloc(struct gfs2_sbd *sdp)
-{
-	unsigned int hits, strikes;
-	int error;
-
-	for (;;) {
-		hits = 0;
-		strikes = 0;
-
-		for (;;) {
-			struct gfs2_unlinked *ul = ul_fish(sdp);
-			if (!ul)
-				return 0;
-			error = gfs2_inode_dealloc(sdp, ul);
-			gfs2_unlinked_put(sdp, ul);
-
-			if (!error) {
-				hits++;
-				if (strikes)
-					strikes--;
-			} else if (error == 1) {
-				strikes++;
-				if (strikes >=
-				    atomic_read(&sdp->sd_unlinked_count)) {
-					error = 0;
-					break;
-				}
-			} else
-				return error;
-		}
-
-		if (!hits || kthread_should_stop())
-			break;
-
-		cond_resched();
-	}
-
-	return 0;
-}
-
-int gfs2_unlinked_init(struct gfs2_sbd *sdp)
-{
-	struct gfs2_inode *ip = sdp->sd_ut_inode->u.generic_ip;
-	unsigned int blocks = ip->i_di.di_size >> sdp->sd_sb.sb_bsize_shift;
-	unsigned int x, slot = 0;
-	unsigned int found = 0;
-	uint64_t dblock;
-	uint32_t extlen = 0;
-	int error;
-
-	if (!ip->i_di.di_size ||
-	    ip->i_di.di_size > (64 << 20) ||
-	    ip->i_di.di_size & (sdp->sd_sb.sb_bsize - 1)) {
-		gfs2_consist_inode(ip);
-		return -EIO;		
-	}
-	sdp->sd_unlinked_slots = blocks * sdp->sd_ut_per_block;
-	sdp->sd_unlinked_chunks = DIV_ROUND_UP(sdp->sd_unlinked_slots,
-					       8 * PAGE_SIZE);
-
-	error = -ENOMEM;
-
-	sdp->sd_unlinked_bitmap = kcalloc(sdp->sd_unlinked_chunks,
-					  sizeof(unsigned char *),
-					  GFP_KERNEL);
-	if (!sdp->sd_unlinked_bitmap)
-		return error;
-
-	for (x = 0; x < sdp->sd_unlinked_chunks; x++) {
-		sdp->sd_unlinked_bitmap[x] = kzalloc(PAGE_SIZE, GFP_KERNEL);
-		if (!sdp->sd_unlinked_bitmap[x])
-			goto fail;
-	}
-
-	for (x = 0; x < blocks; x++) {
-		struct buffer_head *bh;
-		unsigned int y;
-
-		if (!extlen) {
-			int new = 0;
-			error = gfs2_extent_map(ip->i_vnode, x, &new, &dblock, &extlen);
-			if (error)
-				goto fail;
-		}
-		gfs2_meta_ra(ip->i_gl, dblock, extlen);
-		error = gfs2_meta_read(ip->i_gl, dblock, DIO_START | DIO_WAIT,
-				       &bh);
-		if (error)
-			goto fail;
-		error = -EIO;
-		if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_UT)) {
-			brelse(bh);
-			goto fail;
-		}
-
-		for (y = 0;
-		     y < sdp->sd_ut_per_block && slot < sdp->sd_unlinked_slots;
-		     y++, slot++) {
-			struct gfs2_unlinked_tag ut;
-			struct gfs2_unlinked *ul;
-
-			gfs2_unlinked_tag_in(&ut, bh->b_data +
-					  sizeof(struct gfs2_meta_header) +
-					  y * sizeof(struct gfs2_unlinked_tag));
-			if (!ut.ut_inum.no_addr)
-				continue;
-
-			error = -ENOMEM;
-			ul = ul_alloc(sdp);
-			if (!ul) {
-				brelse(bh);
-				goto fail;
-			}
-			ul->ul_ut = ut;
-			ul->ul_slot = slot;
-
-			spin_lock(&sdp->sd_unlinked_spin);
-			gfs2_icbit_munge(sdp, sdp->sd_unlinked_bitmap, slot, 1);
-			spin_unlock(&sdp->sd_unlinked_spin);
-			ul_hash(sdp, ul);
-
-			gfs2_unlinked_put(sdp, ul);
-			found++;
-		}
-
-		brelse(bh);
-		dblock++;
-		extlen--;
-	}
-
-	if (found)
-		fs_info(sdp, "found %u unlinked inodes\n", found);
-
-	return 0;
-
-fail:
-	gfs2_unlinked_cleanup(sdp);
-	return error;
-}
-
-/**
- * gfs2_unlinked_cleanup - get rid of any extra struct gfs2_unlinked structures
- * @sdp: the filesystem
- *
- */
-
-void gfs2_unlinked_cleanup(struct gfs2_sbd *sdp)
-{
-	struct list_head *head = &sdp->sd_unlinked_list;
-	struct gfs2_unlinked *ul;
-	unsigned int x;
-
-	spin_lock(&sdp->sd_unlinked_spin);
-	while (!list_empty(head)) {
-		ul = list_entry(head->next, struct gfs2_unlinked, ul_list);
-
-		if (ul->ul_count > 1) {
-			list_move_tail(&ul->ul_list, head);
-			spin_unlock(&sdp->sd_unlinked_spin);
-			schedule();
-			spin_lock(&sdp->sd_unlinked_spin);
-			continue;
-		}
-
-		list_del_init(&ul->ul_list);
-		atomic_dec(&sdp->sd_unlinked_count);
-
-		gfs2_assert_warn(sdp, ul->ul_count == 1);
-		gfs2_assert_warn(sdp, !test_bit(ULF_LOCKED, &ul->ul_flags));
-		kfree(ul);
-	}
-	spin_unlock(&sdp->sd_unlinked_spin);
-
-	gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_unlinked_count));
-
-	if (sdp->sd_unlinked_bitmap) {
-		for (x = 0; x < sdp->sd_unlinked_chunks; x++)
-			kfree(sdp->sd_unlinked_bitmap[x]);
-		kfree(sdp->sd_unlinked_bitmap);
-	}
-}
-