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Commit 025d0e7f authored by Andreas Gruenbacher's avatar Andreas Gruenbacher
Browse files

gfs2: Remove gfs2_write_{begin,end} 



Now that generic_file_write_iter is no longer used, there are no
remaining users of these address space operations.

Signed-off-by: default avatarAndreas Gruenbacher <agruenba@redhat.com>
Reviewed-by: default avatarBob Peterson <rpeterso@redhat.com>
parent 967bcc91

fs/gfs2/aops.c

+0 −213
Original line number Diff line number Diff line
@@ -639,135 +639,6 @@ static int gfs2_readpages(struct file *file, struct address_space *mapping, 
	return ret;

}



/**

 * gfs2_write_begin - Begin to write to a file

 * @file: The file to write to

 * @mapping: The mapping in which to write

 * @pos: The file offset at which to start writing

 * @len: Length of the write

 * @flags: Various flags

 * @pagep: Pointer to return the page

 * @fsdata: Pointer to return fs data (unused by GFS2)

 *

 * Returns: errno

 */



static int gfs2_write_begin(struct file *file, struct address_space *mapping,

			    loff_t pos, unsigned len, unsigned flags,

			    struct page **pagep, void **fsdata)

{

	struct gfs2_inode *ip = GFS2_I(mapping->host);

	struct gfs2_sbd *sdp = GFS2_SB(mapping->host);

	struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode);

	unsigned int data_blocks = 0, ind_blocks = 0, rblocks;

	unsigned requested = 0;

	int alloc_required;

	int error = 0;

	pgoff_t index = pos >> PAGE_SHIFT;

	unsigned from = pos & (PAGE_SIZE - 1);

	struct page *page;



	gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &ip->i_gh);

	error = gfs2_glock_nq(&ip->i_gh);

	if (unlikely(error))

		goto out_uninit;

	if (&ip->i_inode == sdp->sd_rindex) {

		error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE,

					   GL_NOCACHE, &m_ip->i_gh);

		if (unlikely(error)) {

			gfs2_glock_dq(&ip->i_gh);

			goto out_uninit;

		}

	}



	alloc_required = gfs2_write_alloc_required(ip, pos, len);



	if (alloc_required || gfs2_is_jdata(ip))

		gfs2_write_calc_reserv(ip, len, &data_blocks, &ind_blocks);



	if (alloc_required) {

		struct gfs2_alloc_parms ap = { .aflags = 0, };

		requested = data_blocks + ind_blocks;

		ap.target = requested;

		error = gfs2_quota_lock_check(ip, &ap);

		if (error)

			goto out_unlock;



		error = gfs2_inplace_reserve(ip, &ap);

		if (error)

			goto out_qunlock;

	}



	rblocks = RES_DINODE + ind_blocks;

	if (gfs2_is_jdata(ip))

		rblocks += data_blocks ? data_blocks : 1;

	if (ind_blocks || data_blocks)

		rblocks += RES_STATFS + RES_QUOTA;

	if (&ip->i_inode == sdp->sd_rindex)

		rblocks += 2 * RES_STATFS;

	if (alloc_required)

		rblocks += gfs2_rg_blocks(ip, requested);



	error = gfs2_trans_begin(sdp, rblocks,

				 PAGE_SIZE/sdp->sd_sb.sb_bsize);

	if (error)

		goto out_trans_fail;



	error = -ENOMEM;

	flags |= AOP_FLAG_NOFS;

	page = grab_cache_page_write_begin(mapping, index, flags);

	*pagep = page;

	if (unlikely(!page))

		goto out_endtrans;



	if (gfs2_is_stuffed(ip)) {

		error = 0;

		if (pos + len > gfs2_max_stuffed_size(ip)) {

			error = gfs2_unstuff_dinode(ip, page);

			if (error == 0)

				goto prepare_write;

		} else if (!PageUptodate(page)) {

			error = stuffed_readpage(ip, page);

		}

		goto out;

	}



prepare_write:

	error = __block_write_begin(page, from, len, gfs2_block_map);

out:

	if (error == 0)

		return 0;



	unlock_page(page);

	put_page(page);



	gfs2_trans_end(sdp);

	if (alloc_required) {

		gfs2_inplace_release(ip);

		if (pos + len > ip->i_inode.i_size)

			gfs2_trim_blocks(&ip->i_inode);

	}

	goto out_qunlock;



out_endtrans:

	gfs2_trans_end(sdp);

out_trans_fail:

	if (alloc_required)

		gfs2_inplace_release(ip);

out_qunlock:

	if (alloc_required)

		gfs2_quota_unlock(ip);

out_unlock:

	if (&ip->i_inode == sdp->sd_rindex) {

		gfs2_glock_dq(&m_ip->i_gh);

		gfs2_holder_uninit(&m_ip->i_gh);

	}

	gfs2_glock_dq(&ip->i_gh);

out_uninit:

	gfs2_holder_uninit(&ip->i_gh);

	return error;

}



/**

 * adjust_fs_space - Adjusts the free space available due to gfs2_grow

 * @inode: the rindex inode
@@ -848,84 +719,6 @@ int gfs2_stuffed_write_end(struct inode *inode, struct buffer_head *dibh, 
	return copied;

}



/**

 * gfs2_write_end

 * @file: The file to write to

 * @mapping: The address space to write to

 * @pos: The file position

 * @len: The length of the data

 * @copied: How much was actually copied by the VFS

 * @page: The page that has been written

 * @fsdata: The fsdata (unused in GFS2)

 *

 * The main write_end function for GFS2. We just put our locking around the VFS

 * provided functions.

 *

 * Returns: copied bytes or errno

 */



static int gfs2_write_end(struct file *file, struct address_space *mapping,

			  loff_t pos, unsigned len, unsigned copied,

			  struct page *page, void *fsdata)

{

	struct inode *inode = page->mapping->host;

	struct gfs2_inode *ip = GFS2_I(inode);

	struct gfs2_sbd *sdp = GFS2_SB(inode);

	struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode);

	struct buffer_head *dibh;

	int ret;

	struct gfs2_trans *tr = current->journal_info;

	BUG_ON(!tr);



	BUG_ON(gfs2_glock_is_locked_by_me(ip->i_gl) == NULL);



	ret = gfs2_meta_inode_buffer(ip, &dibh);

	if (unlikely(ret))

		goto out;



	if (gfs2_is_stuffed(ip)) {

		ret = gfs2_stuffed_write_end(inode, dibh, pos, copied, page);

		page = NULL;

		goto out2;

	}



	if (gfs2_is_jdata(ip))

		gfs2_page_add_databufs(ip, page, pos & ~PAGE_MASK, len);

	else

		gfs2_ordered_add_inode(ip);



	ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata);

	page = NULL;

	if (tr->tr_num_buf_new)

		__mark_inode_dirty(inode, I_DIRTY_DATASYNC);

	else

		gfs2_trans_add_meta(ip->i_gl, dibh);



out2:

	if (inode == sdp->sd_rindex) {

		adjust_fs_space(inode);

		sdp->sd_rindex_uptodate = 0;

	}



	brelse(dibh);

out:

	if (page) {

		unlock_page(page);

		put_page(page);

	}

	gfs2_trans_end(sdp);

	gfs2_inplace_release(ip);

	if (ip->i_qadata && ip->i_qadata->qa_qd_num)

		gfs2_quota_unlock(ip);

	if (inode == sdp->sd_rindex) {

		gfs2_glock_dq(&m_ip->i_gh);

		gfs2_holder_uninit(&m_ip->i_gh);

	}

	gfs2_glock_dq(&ip->i_gh);

	gfs2_holder_uninit(&ip->i_gh);

	return ret;

}



/**

 * jdata_set_page_dirty - Page dirtying function

 * @page: The page to dirty
@@ -1093,8 +886,6 @@ static const struct address_space_operations gfs2_writeback_aops = { 
	.writepages = gfs2_writepages,

	.readpage = gfs2_readpage,

	.readpages = gfs2_readpages,

	.write_begin = gfs2_write_begin,

	.write_end = gfs2_write_end,

	.bmap = gfs2_bmap,

	.invalidatepage = gfs2_invalidatepage,

	.releasepage = gfs2_releasepage,
@@ -1109,8 +900,6 @@ static const struct address_space_operations gfs2_ordered_aops = { 
	.writepages = gfs2_writepages,

	.readpage = gfs2_readpage,

	.readpages = gfs2_readpages,

	.write_begin = gfs2_write_begin,

	.write_end = gfs2_write_end,

	.set_page_dirty = __set_page_dirty_buffers,

	.bmap = gfs2_bmap,

	.invalidatepage = gfs2_invalidatepage,
@@ -1126,8 +915,6 @@ static const struct address_space_operations gfs2_jdata_aops = { 
	.writepages = gfs2_jdata_writepages,

	.readpage = gfs2_readpage,

	.readpages = gfs2_readpages,

	.write_begin = gfs2_write_begin,

	.write_end = gfs2_write_end,

	.set_page_dirty = jdata_set_page_dirty,

	.bmap = gfs2_bmap,

	.invalidatepage = gfs2_invalidatepage,