Commit aa405b1f authored by Ryusuke Konishi's avatar Ryusuke Konishi
Browse files

nilfs2: always set back pointer to host inode in mapping->host 



In the current nilfs, page cache for btree nodes and meta data files
do not set a valid back pointer to the host inode in mapping->host.

This will change it so that every address space in nilfs uses
mapping->host to hold its host inode.

Signed-off-by: default avatarRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
parent 0ef28f9a

fs/nilfs2/btnode.c

+0 −6
Original line number Diff line number Diff line
@@ -34,12 +34,6 @@ 
#include "page.h"

#include "btnode.h"



void nilfs_btnode_cache_init(struct address_space *btnc,

			     struct backing_dev_info *bdi)

{

	nilfs_mapping_init(btnc, bdi);

}



void nilfs_btnode_cache_clear(struct address_space *btnc)

{

	invalidate_mapping_pages(btnc, 0, -1);

fs/nilfs2/btnode.h

+0 −1
Original line number Diff line number Diff line
@@ -37,7 +37,6 @@ struct nilfs_btnode_chkey_ctxt { 
	struct buffer_head *newbh;

};



void nilfs_btnode_cache_init(struct address_space *, struct backing_dev_info *);

void nilfs_btnode_cache_clear(struct address_space *);

struct buffer_head *nilfs_btnode_create_block(struct address_space *btnc,

					      __u64 blocknr);

fs/nilfs2/mdt.c

+2 −2
Original line number Diff line number Diff line
@@ -450,9 +450,9 @@ int nilfs_mdt_setup_shadow_map(struct inode *inode, 


	INIT_LIST_HEAD(&shadow->frozen_buffers);

	address_space_init_once(&shadow->frozen_data);

	nilfs_mapping_init(&shadow->frozen_data, bdi);

	nilfs_mapping_init(&shadow->frozen_data, inode, bdi);

	address_space_init_once(&shadow->frozen_btnodes);

	nilfs_mapping_init(&shadow->frozen_btnodes, bdi);

	nilfs_mapping_init(&shadow->frozen_btnodes, inode, bdi);

	mi->mi_shadow = shadow;

	return 0;

}

fs/nilfs2/nilfs.h

+0 −6
Original line number Diff line number Diff line
@@ -80,12 +80,6 @@ static inline struct inode *NILFS_BTNC_I(struct address_space *btnc) 
	return &ii->vfs_inode;

}



static inline struct inode *NILFS_AS_I(struct address_space *mapping)

{

	return (mapping->host) ? :

		container_of(mapping, struct inode, i_data);

}



/*

 * Dynamic state flags of NILFS on-memory inode (i_state)

 */

fs/nilfs2/page.c

+5 −8
Original line number Diff line number Diff line
@@ -182,7 +182,7 @@ int nilfs_page_buffers_clean(struct page *page) 
void nilfs_page_bug(struct page *page)

{

	struct address_space *m;

	unsigned long ino = 0;

	unsigned long ino;



	if (unlikely(!page)) {

		printk(KERN_CRIT "NILFS_PAGE_BUG(NULL)\n");
@@ -190,11 +190,8 @@ void nilfs_page_bug(struct page *page) 
	}



	m = page->mapping;

	if (m) {

		struct inode *inode = NILFS_AS_I(m);

		if (inode != NULL)

			ino = inode->i_ino;

	}

	ino = m ? m->host->i_ino : 0;



	printk(KERN_CRIT "NILFS_PAGE_BUG(%p): cnt=%d index#=%llu flags=0x%lx "

	       "mapping=%p ino=%lu\n",

	       page, atomic_read(&page->_count),
@@ -441,10 +438,10 @@ unsigned nilfs_page_count_clean_buffers(struct page *page, 
	return nc;

}



void nilfs_mapping_init(struct address_space *mapping,

void nilfs_mapping_init(struct address_space *mapping, struct inode *inode,

			struct backing_dev_info *bdi)

{

	mapping->host = NULL;

	mapping->host = inode;

	mapping->flags = 0;

	mapping_set_gfp_mask(mapping, GFP_NOFS);

	mapping->assoc_mapping = NULL;

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