Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 777 insertions, 0 deletions

diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c
new file mode 100644
index 0000000000..c26d48355c
--- /dev/null
+++ b/fs/gfs2/aops.c
@@ -0,0 +1,777 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
+ * Copyright (C) 2004-2008 Red Hat, Inc.  All rights reserved.
+ */
+
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/completion.h>
+#include <linux/buffer_head.h>
+#include <linux/pagemap.h>
+#include <linux/pagevec.h>
+#include <linux/mpage.h>
+#include <linux/fs.h>
+#include <linux/writeback.h>
+#include <linux/swap.h>
+#include <linux/gfs2_ondisk.h>
+#include <linux/backing-dev.h>
+#include <linux/uio.h>
+#include <trace/events/writeback.h>
+#include <linux/sched/signal.h>
+
+#include "gfs2.h"
+#include "incore.h"
+#include "bmap.h"
+#include "glock.h"
+#include "inode.h"
+#include "log.h"
+#include "meta_io.h"
+#include "quota.h"
+#include "trans.h"
+#include "rgrp.h"
+#include "super.h"
+#include "util.h"
+#include "glops.h"
+#include "aops.h"
+
+
+void gfs2_trans_add_databufs(struct gfs2_inode *ip, struct folio *folio,
+			     size_t from, size_t len)
+{
+	struct buffer_head *head = folio_buffers(folio);
+	unsigned int bsize = head->b_size;
+	struct buffer_head *bh;
+	size_t to = from + len;
+	size_t start, end;
+
+	for (bh = head, start = 0; bh != head || !start;
+	     bh = bh->b_this_page, start = end) {
+		end = start + bsize;
+		if (end <= from)
+			continue;
+		if (start >= to)
+			break;
+		set_buffer_uptodate(bh);
+		gfs2_trans_add_data(ip->i_gl, bh);
+	}
+}
+
+/**
+ * gfs2_get_block_noalloc - Fills in a buffer head with details about a block
+ * @inode: The inode
+ * @lblock: The block number to look up
+ * @bh_result: The buffer head to return the result in
+ * @create: Non-zero if we may add block to the file
+ *
+ * Returns: errno
+ */
+
+static int gfs2_get_block_noalloc(struct inode *inode, sector_t lblock,
+				  struct buffer_head *bh_result, int create)
+{
+	int error;
+
+	error = gfs2_block_map(inode, lblock, bh_result, 0);
+	if (error)
+		return error;
+	if (!buffer_mapped(bh_result))
+		return -ENODATA;
+	return 0;
+}
+
+/**
+ * gfs2_write_jdata_folio - gfs2 jdata-specific version of block_write_full_page
+ * @folio: The folio to write
+ * @wbc: The writeback control
+ *
+ * This is the same as calling block_write_full_page, but it also
+ * writes pages outside of i_size
+ */
+static int gfs2_write_jdata_folio(struct folio *folio,
+				 struct writeback_control *wbc)
+{
+	struct inode * const inode = folio->mapping->host;
+	loff_t i_size = i_size_read(inode);
+
+	/*
+	 * The folio straddles i_size.  It must be zeroed out on each and every
+	 * writepage invocation 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."
+	 */
+	if (folio_pos(folio) < i_size &&
+	    i_size < folio_pos(folio) + folio_size(folio))
+		folio_zero_segment(folio, offset_in_folio(folio, i_size),
+				folio_size(folio));
+
+	return __block_write_full_folio(inode, folio, gfs2_get_block_noalloc,
+			wbc, end_buffer_async_write);
+}
+
+/**
+ * __gfs2_jdata_write_folio - The core of jdata writepage
+ * @folio: The folio to write
+ * @wbc: The writeback control
+ *
+ * This is shared between writepage and writepages and implements the
+ * core of the writepage operation. If a transaction is required then
+ * the checked flag will have been set and the transaction will have
+ * already been started before this is called.
+ */
+static int __gfs2_jdata_write_folio(struct folio *folio,
+		struct writeback_control *wbc)
+{
+	struct inode *inode = folio->mapping->host;
+	struct gfs2_inode *ip = GFS2_I(inode);
+
+	if (folio_test_checked(folio)) {
+		folio_clear_checked(folio);
+		if (!folio_buffers(folio)) {
+			folio_create_empty_buffers(folio,
+					inode->i_sb->s_blocksize,
+					BIT(BH_Dirty)|BIT(BH_Uptodate));
+		}
+		gfs2_trans_add_databufs(ip, folio, 0, folio_size(folio));
+	}
+	return gfs2_write_jdata_folio(folio, wbc);
+}
+
+/**
+ * gfs2_jdata_writepage - Write complete page
+ * @page: Page to write
+ * @wbc: The writeback control
+ *
+ * Returns: errno
+ *
+ */
+
+static int gfs2_jdata_writepage(struct page *page, struct writeback_control *wbc)
+{
+	struct folio *folio = page_folio(page);
+	struct inode *inode = page->mapping->host;
+	struct gfs2_inode *ip = GFS2_I(inode);
+	struct gfs2_sbd *sdp = GFS2_SB(inode);
+
+	if (gfs2_assert_withdraw(sdp, gfs2_glock_is_held_excl(ip->i_gl)))
+		goto out;
+	if (folio_test_checked(folio) || current->journal_info)
+		goto out_ignore;
+	return __gfs2_jdata_write_folio(folio, wbc);
+
+out_ignore:
+	folio_redirty_for_writepage(wbc, folio);
+out:
+	folio_unlock(folio);
+	return 0;
+}
+
+/**
+ * gfs2_writepages - Write a bunch of dirty pages back to disk
+ * @mapping: The mapping to write
+ * @wbc: Write-back control
+ *
+ * Used for both ordered and writeback modes.
+ */
+static int gfs2_writepages(struct address_space *mapping,
+			   struct writeback_control *wbc)
+{
+	struct gfs2_sbd *sdp = gfs2_mapping2sbd(mapping);
+	struct iomap_writepage_ctx wpc = { };
+	int ret;
+
+	/*
+	 * Even if we didn't write enough pages here, we might still be holding
+	 * dirty pages in the ail. We forcibly flush the ail because we don't
+	 * want balance_dirty_pages() to loop indefinitely trying to write out
+	 * pages held in the ail that it can't find.
+	 */
+	ret = iomap_writepages(mapping, wbc, &wpc, &gfs2_writeback_ops);
+	if (ret == 0 && wbc->nr_to_write > 0)
+		set_bit(SDF_FORCE_AIL_FLUSH, &sdp->sd_flags);
+	return ret;
+}
+
+/**
+ * gfs2_write_jdata_batch - Write back a folio batch's worth of folios
+ * @mapping: The mapping
+ * @wbc: The writeback control
+ * @fbatch: The batch of folios
+ * @done_index: Page index
+ *
+ * Returns: non-zero if loop should terminate, zero otherwise
+ */
+
+static int gfs2_write_jdata_batch(struct address_space *mapping,
+				    struct writeback_control *wbc,
+				    struct folio_batch *fbatch,
+				    pgoff_t *done_index)
+{
+	struct inode *inode = mapping->host;
+	struct gfs2_sbd *sdp = GFS2_SB(inode);
+	unsigned nrblocks;
+	int i;
+	int ret;
+	int nr_pages = 0;
+	int nr_folios = folio_batch_count(fbatch);
+
+	for (i = 0; i < nr_folios; i++)
+		nr_pages += folio_nr_pages(fbatch->folios[i]);
+	nrblocks = nr_pages * (PAGE_SIZE >> inode->i_blkbits);
+
+	ret = gfs2_trans_begin(sdp, nrblocks, nrblocks);
+	if (ret < 0)
+		return ret;
+
+	for (i = 0; i < nr_folios; i++) {
+		struct folio *folio = fbatch->folios[i];
+
+		*done_index = folio->index;
+
+		folio_lock(folio);
+
+		if (unlikely(folio->mapping != mapping)) {
+continue_unlock:
+			folio_unlock(folio);
+			continue;
+		}
+
+		if (!folio_test_dirty(folio)) {
+			/* someone wrote it for us */
+			goto continue_unlock;
+		}
+
+		if (folio_test_writeback(folio)) {
+			if (wbc->sync_mode != WB_SYNC_NONE)
+				folio_wait_writeback(folio);
+			else
+				goto continue_unlock;
+		}
+
+		BUG_ON(folio_test_writeback(folio));
+		if (!folio_clear_dirty_for_io(folio))
+			goto continue_unlock;
+
+		trace_wbc_writepage(wbc, inode_to_bdi(inode));
+
+		ret = __gfs2_jdata_write_folio(folio, wbc);
+		if (unlikely(ret)) {
+			if (ret == AOP_WRITEPAGE_ACTIVATE) {
+				folio_unlock(folio);
+				ret = 0;
+			} else {
+
+				/*
+				 * done_index is set past this page,
+				 * so media errors will not choke
+				 * background writeout for the entire
+				 * file. This has consequences for
+				 * range_cyclic semantics (ie. it may
+				 * not be suitable for data integrity
+				 * writeout).
+				 */
+				*done_index = folio_next_index(folio);
+				ret = 1;
+				break;
+			}
+		}
+
+		/*
+		 * We stop writing back only if we are not doing
+		 * integrity sync. In case of integrity sync we have to
+		 * keep going until we have written all the pages
+		 * we tagged for writeback prior to entering this loop.
+		 */
+		if (--wbc->nr_to_write <= 0 && wbc->sync_mode == WB_SYNC_NONE) {
+			ret = 1;
+			break;
+		}
+
+	}
+	gfs2_trans_end(sdp);
+	return ret;
+}
+
+/**
+ * gfs2_write_cache_jdata - Like write_cache_pages but different
+ * @mapping: The mapping to write
+ * @wbc: The writeback control
+ *
+ * The reason that we use our own function here is that we need to
+ * start transactions before we grab page locks. This allows us
+ * to get the ordering right.
+ */
+
+static int gfs2_write_cache_jdata(struct address_space *mapping,
+				  struct writeback_control *wbc)
+{
+	int ret = 0;
+	int done = 0;
+	struct folio_batch fbatch;
+	int nr_folios;
+	pgoff_t writeback_index;
+	pgoff_t index;
+	pgoff_t end;
+	pgoff_t done_index;
+	int cycled;
+	int range_whole = 0;
+	xa_mark_t tag;
+
+	folio_batch_init(&fbatch);
+	if (wbc->range_cyclic) {
+		writeback_index = mapping->writeback_index; /* prev offset */
+		index = writeback_index;
+		if (index == 0)
+			cycled = 1;
+		else
+			cycled = 0;
+		end = -1;
+	} else {
+		index = wbc->range_start >> PAGE_SHIFT;
+		end = wbc->range_end >> PAGE_SHIFT;
+		if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX)
+			range_whole = 1;
+		cycled = 1; /* ignore range_cyclic tests */
+	}
+	if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
+		tag = PAGECACHE_TAG_TOWRITE;
+	else
+		tag = PAGECACHE_TAG_DIRTY;
+
+retry:
+	if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
+		tag_pages_for_writeback(mapping, index, end);
+	done_index = index;
+	while (!done && (index <= end)) {
+		nr_folios = filemap_get_folios_tag(mapping, &index, end,
+				tag, &fbatch);
+		if (nr_folios == 0)
+			break;
+
+		ret = gfs2_write_jdata_batch(mapping, wbc, &fbatch,
+				&done_index);
+		if (ret)
+			done = 1;
+		if (ret > 0)
+			ret = 0;
+		folio_batch_release(&fbatch);
+		cond_resched();
+	}
+
+	if (!cycled && !done) {
+		/*
+		 * range_cyclic:
+		 * We hit the last page and there is more work to be done: wrap
+		 * back to the start of the file
+		 */
+		cycled = 1;
+		index = 0;
+		end = writeback_index - 1;
+		goto retry;
+	}
+
+	if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0))
+		mapping->writeback_index = done_index;
+
+	return ret;
+}
+
+
+/**
+ * gfs2_jdata_writepages - Write a bunch of dirty pages back to disk
+ * @mapping: The mapping to write
+ * @wbc: The writeback control
+ * 
+ */
+
+static int gfs2_jdata_writepages(struct address_space *mapping,
+				 struct writeback_control *wbc)
+{
+	struct gfs2_inode *ip = GFS2_I(mapping->host);
+	struct gfs2_sbd *sdp = GFS2_SB(mapping->host);
+	int ret;
+
+	ret = gfs2_write_cache_jdata(mapping, wbc);
+	if (ret == 0 && wbc->sync_mode == WB_SYNC_ALL) {
+		gfs2_log_flush(sdp, ip->i_gl, GFS2_LOG_HEAD_FLUSH_NORMAL |
+			       GFS2_LFC_JDATA_WPAGES);
+		ret = gfs2_write_cache_jdata(mapping, wbc);
+	}
+	return ret;
+}
+
+/**
+ * stuffed_readpage - Fill in a Linux page with stuffed file data
+ * @ip: the inode
+ * @page: the page
+ *
+ * Returns: errno
+ */
+static int stuffed_readpage(struct gfs2_inode *ip, struct page *page)
+{
+	struct buffer_head *dibh;
+	u64 dsize = i_size_read(&ip->i_inode);
+	void *kaddr;
+	int error;
+
+	/*
+	 * Due to the order of unstuffing files and ->fault(), we can be
+	 * asked for a zero page in the case of a stuffed file being extended,
+	 * so we need to supply one here. It doesn't happen often.
+	 */
+	if (unlikely(page->index)) {
+		zero_user(page, 0, PAGE_SIZE);
+		SetPageUptodate(page);
+		return 0;
+	}
+
+	error = gfs2_meta_inode_buffer(ip, &dibh);
+	if (error)
+		return error;
+
+	kaddr = kmap_local_page(page);
+	memcpy(kaddr, dibh->b_data + sizeof(struct gfs2_dinode), dsize);
+	memset(kaddr + dsize, 0, PAGE_SIZE - dsize);
+	kunmap_local(kaddr);
+	flush_dcache_page(page);
+	brelse(dibh);
+	SetPageUptodate(page);
+
+	return 0;
+}
+
+/**
+ * gfs2_read_folio - read a folio from a file
+ * @file: The file to read
+ * @folio: The folio in the file
+ */
+static int gfs2_read_folio(struct file *file, struct folio *folio)
+{
+	struct inode *inode = folio->mapping->host;
+	struct gfs2_inode *ip = GFS2_I(inode);
+	struct gfs2_sbd *sdp = GFS2_SB(inode);
+	int error;
+
+	if (!gfs2_is_jdata(ip) ||
+	    (i_blocksize(inode) == PAGE_SIZE && !folio_buffers(folio))) {
+		error = iomap_read_folio(folio, &gfs2_iomap_ops);
+	} else if (gfs2_is_stuffed(ip)) {
+		error = stuffed_readpage(ip, &folio->page);
+		folio_unlock(folio);
+	} else {
+		error = mpage_read_folio(folio, gfs2_block_map);
+	}
+
+	if (unlikely(gfs2_withdrawn(sdp)))
+		return -EIO;
+
+	return error;
+}
+
+/**
+ * gfs2_internal_read - read an internal file
+ * @ip: The gfs2 inode
+ * @buf: The buffer to fill
+ * @pos: The file position
+ * @size: The amount to read
+ *
+ */
+
+int gfs2_internal_read(struct gfs2_inode *ip, char *buf, loff_t *pos,
+                       unsigned size)
+{
+	struct address_space *mapping = ip->i_inode.i_mapping;
+	unsigned long index = *pos >> PAGE_SHIFT;
+	unsigned offset = *pos & (PAGE_SIZE - 1);
+	unsigned copied = 0;
+	unsigned amt;
+	struct page *page;
+
+	do {
+		page = read_cache_page(mapping, index, gfs2_read_folio, NULL);
+		if (IS_ERR(page)) {
+			if (PTR_ERR(page) == -EINTR)
+				continue;
+			return PTR_ERR(page);
+		}
+		amt = size - copied;
+		if (offset + size > PAGE_SIZE)
+			amt = PAGE_SIZE - offset;
+		memcpy_from_page(buf + copied, page, offset, amt);
+		put_page(page);
+		copied += amt;
+		index++;
+		offset = 0;
+	} while(copied < size);
+	(*pos) += size;
+	return size;
+}
+
+/**
+ * gfs2_readahead - Read a bunch of pages at once
+ * @rac: Read-ahead control structure
+ *
+ * Some notes:
+ * 1. This is only for readahead, so we can simply ignore any things
+ *    which are slightly inconvenient (such as locking conflicts between
+ *    the page lock and the glock) and return having done no I/O. Its
+ *    obviously not something we'd want to do on too regular a basis.
+ *    Any I/O we ignore at this time will be done via readpage later.
+ * 2. We don't handle stuffed files here we let readpage do the honours.
+ * 3. mpage_readahead() does most of the heavy lifting in the common case.
+ * 4. gfs2_block_map() is relied upon to set BH_Boundary in the right places.
+ */
+
+static void gfs2_readahead(struct readahead_control *rac)
+{
+	struct inode *inode = rac->mapping->host;
+	struct gfs2_inode *ip = GFS2_I(inode);
+
+	if (gfs2_is_stuffed(ip))
+		;
+	else if (gfs2_is_jdata(ip))
+		mpage_readahead(rac, gfs2_block_map);
+	else
+		iomap_readahead(rac, &gfs2_iomap_ops);
+}
+
+/**
+ * adjust_fs_space - Adjusts the free space available due to gfs2_grow
+ * @inode: the rindex inode
+ */
+void adjust_fs_space(struct inode *inode)
+{
+	struct gfs2_sbd *sdp = GFS2_SB(inode);
+	struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode);
+	struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
+	struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
+	struct buffer_head *m_bh;
+	u64 fs_total, new_free;
+
+	if (gfs2_trans_begin(sdp, 2 * RES_STATFS, 0) != 0)
+		return;
+
+	/* Total up the file system space, according to the latest rindex. */
+	fs_total = gfs2_ri_total(sdp);
+	if (gfs2_meta_inode_buffer(m_ip, &m_bh) != 0)
+		goto out;
+
+	spin_lock(&sdp->sd_statfs_spin);
+	gfs2_statfs_change_in(m_sc, m_bh->b_data +
+			      sizeof(struct gfs2_dinode));
+	if (fs_total > (m_sc->sc_total + l_sc->sc_total))
+		new_free = fs_total - (m_sc->sc_total + l_sc->sc_total);
+	else
+		new_free = 0;
+	spin_unlock(&sdp->sd_statfs_spin);
+	fs_warn(sdp, "File system extended by %llu blocks.\n",
+		(unsigned long long)new_free);
+	gfs2_statfs_change(sdp, new_free, new_free, 0);
+
+	update_statfs(sdp, m_bh);
+	brelse(m_bh);
+out:
+	sdp->sd_rindex_uptodate = 0;
+	gfs2_trans_end(sdp);
+}
+
+static bool jdata_dirty_folio(struct address_space *mapping,
+		struct folio *folio)
+{
+	if (current->journal_info)
+		folio_set_checked(folio);
+	return block_dirty_folio(mapping, folio);
+}
+
+/**
+ * gfs2_bmap - Block map function
+ * @mapping: Address space info
+ * @lblock: The block to map
+ *
+ * Returns: The disk address for the block or 0 on hole or error
+ */
+
+static sector_t gfs2_bmap(struct address_space *mapping, sector_t lblock)
+{
+	struct gfs2_inode *ip = GFS2_I(mapping->host);
+	struct gfs2_holder i_gh;
+	sector_t dblock = 0;
+	int error;
+
+	error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
+	if (error)
+		return 0;
+
+	if (!gfs2_is_stuffed(ip))
+		dblock = iomap_bmap(mapping, lblock, &gfs2_iomap_ops);
+
+	gfs2_glock_dq_uninit(&i_gh);
+
+	return dblock;
+}
+
+static void gfs2_discard(struct gfs2_sbd *sdp, struct buffer_head *bh)
+{
+	struct gfs2_bufdata *bd;
+
+	lock_buffer(bh);
+	gfs2_log_lock(sdp);
+	clear_buffer_dirty(bh);
+	bd = bh->b_private;
+	if (bd) {
+		if (!list_empty(&bd->bd_list) && !buffer_pinned(bh))
+			list_del_init(&bd->bd_list);
+		else {
+			spin_lock(&sdp->sd_ail_lock);
+			gfs2_remove_from_journal(bh, REMOVE_JDATA);
+			spin_unlock(&sdp->sd_ail_lock);
+		}
+	}
+	bh->b_bdev = NULL;
+	clear_buffer_mapped(bh);
+	clear_buffer_req(bh);
+	clear_buffer_new(bh);
+	gfs2_log_unlock(sdp);
+	unlock_buffer(bh);
+}
+
+static void gfs2_invalidate_folio(struct folio *folio, size_t offset,
+				size_t length)
+{
+	struct gfs2_sbd *sdp = GFS2_SB(folio->mapping->host);
+	size_t stop = offset + length;
+	int partial_page = (offset || length < folio_size(folio));
+	struct buffer_head *bh, *head;
+	unsigned long pos = 0;
+
+	BUG_ON(!folio_test_locked(folio));
+	if (!partial_page)
+		folio_clear_checked(folio);
+	head = folio_buffers(folio);
+	if (!head)
+		goto out;
+
+	bh = head;
+	do {
+		if (pos + bh->b_size > stop)
+			return;
+
+		if (offset <= pos)
+			gfs2_discard(sdp, bh);
+		pos += bh->b_size;
+		bh = bh->b_this_page;
+	} while (bh != head);
+out:
+	if (!partial_page)
+		filemap_release_folio(folio, 0);
+}
+
+/**
+ * gfs2_release_folio - free the metadata associated with a folio
+ * @folio: the folio that's being released
+ * @gfp_mask: passed from Linux VFS, ignored by us
+ *
+ * Calls try_to_free_buffers() to free the buffers and put the folio if the
+ * buffers can be released.
+ *
+ * Returns: true if the folio was put or else false
+ */
+
+bool gfs2_release_folio(struct folio *folio, gfp_t gfp_mask)
+{
+	struct address_space *mapping = folio->mapping;
+	struct gfs2_sbd *sdp = gfs2_mapping2sbd(mapping);
+	struct buffer_head *bh, *head;
+	struct gfs2_bufdata *bd;
+
+	head = folio_buffers(folio);
+	if (!head)
+		return false;
+
+	/*
+	 * mm accommodates an old ext3 case where clean folios might
+	 * not have had the dirty bit cleared.	Thus, it can send actual
+	 * dirty folios to ->release_folio() via shrink_active_list().
+	 *
+	 * As a workaround, we skip folios that contain dirty buffers
+	 * below.  Once ->release_folio isn't called on dirty folios
+	 * anymore, we can warn on dirty buffers like we used to here
+	 * again.
+	 */
+
+	gfs2_log_lock(sdp);
+	bh = head;
+	do {
+		if (atomic_read(&bh->b_count))
+			goto cannot_release;
+		bd = bh->b_private;
+		if (bd && bd->bd_tr)
+			goto cannot_release;
+		if (buffer_dirty(bh) || WARN_ON(buffer_pinned(bh)))
+			goto cannot_release;
+		bh = bh->b_this_page;
+	} while (bh != head);
+
+	bh = head;
+	do {
+		bd = bh->b_private;
+		if (bd) {
+			gfs2_assert_warn(sdp, bd->bd_bh == bh);
+			bd->bd_bh = NULL;
+			bh->b_private = NULL;
+			/*
+			 * The bd may still be queued as a revoke, in which
+			 * case we must not dequeue nor free it.
+			 */
+			if (!bd->bd_blkno && !list_empty(&bd->bd_list))
+				list_del_init(&bd->bd_list);
+			if (list_empty(&bd->bd_list))
+				kmem_cache_free(gfs2_bufdata_cachep, bd);
+		}
+
+		bh = bh->b_this_page;
+	} while (bh != head);
+	gfs2_log_unlock(sdp);
+
+	return try_to_free_buffers(folio);
+
+cannot_release:
+	gfs2_log_unlock(sdp);
+	return false;
+}
+
+static const struct address_space_operations gfs2_aops = {
+	.writepages = gfs2_writepages,
+	.read_folio = gfs2_read_folio,
+	.readahead = gfs2_readahead,
+	.dirty_folio = iomap_dirty_folio,
+	.release_folio = iomap_release_folio,
+	.invalidate_folio = iomap_invalidate_folio,
+	.bmap = gfs2_bmap,
+	.migrate_folio = filemap_migrate_folio,
+	.is_partially_uptodate = iomap_is_partially_uptodate,
+	.error_remove_page = generic_error_remove_page,
+};
+
+static const struct address_space_operations gfs2_jdata_aops = {
+	.writepage = gfs2_jdata_writepage,
+	.writepages = gfs2_jdata_writepages,
+	.read_folio = gfs2_read_folio,
+	.readahead = gfs2_readahead,
+	.dirty_folio = jdata_dirty_folio,
+	.bmap = gfs2_bmap,
+	.invalidate_folio = gfs2_invalidate_folio,
+	.release_folio = gfs2_release_folio,
+	.is_partially_uptodate = block_is_partially_uptodate,
+	.error_remove_page = generic_error_remove_page,
+};
+
+void gfs2_set_aops(struct inode *inode)
+{
+	if (gfs2_is_jdata(GFS2_I(inode)))
+		inode->i_mapping->a_ops = &gfs2_jdata_aops;
+	else
+		inode->i_mapping->a_ops = &gfs2_aops;
+}