f2fs: add help function META_MAPPING

Introduce help function META_MAPPING() to get the cache meta blocks'
address space.

Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 4de0345..f9d4f7d 100644 (file)
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -30,7 +30,7 @@ static struct kmem_cache *inode_entry_slab;
  */
 struct page *grab_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
 {
-       struct address_space *mapping = sbi->meta_inode->i_mapping;
+       struct address_space *mapping = META_MAPPING(sbi);
        struct page *page = NULL;
 repeat:
        page = grab_cache_page(mapping, index);
@@ -50,7 +50,7 @@ repeat:
  */
 struct page *get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
 {
-       struct address_space *mapping = sbi->meta_inode->i_mapping;
+       struct address_space *mapping = META_MAPPING(sbi);
        struct page *page;
 repeat:
        page = grab_cache_page(mapping, index);
@@ -128,7 +128,7 @@ static int f2fs_write_meta_pages(struct address_space *mapping,
 long sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type,
                                                long nr_to_write)
 {
-       struct address_space *mapping = sbi->meta_inode->i_mapping;
+       struct address_space *mapping = META_MAPPING(sbi);
        pgoff_t index = 0, end = LONG_MAX;
        struct pagevec pvec;
        long nwritten = 0;
@@ -771,7 +771,7 @@ static void do_checkpoint(struct f2fs_sb_info *sbi, bool is_umount)
        wait_on_all_pages_writeback(sbi);
 
        filemap_fdatawait_range(sbi->node_inode->i_mapping, 0, LONG_MAX);
-       filemap_fdatawait_range(sbi->meta_inode->i_mapping, 0, LONG_MAX);
+       filemap_fdatawait_range(META_MAPPING(sbi), 0, LONG_MAX);
 
        /* update user_block_counts */
        sbi->last_valid_block_count = sbi->total_valid_block_count;

diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
index 63cb7e2..8bdc365 100644 (file)
--- a/fs/f2fs/debug.c
+++ b/fs/f2fs/debug.c
@@ -53,7 +53,7 @@ static void update_general_status(struct f2fs_sb_info *sbi)
        si->prefree_count = prefree_segments(sbi);
        si->dirty_count = dirty_segments(sbi);
        si->node_pages = sbi->node_inode->i_mapping->nrpages;
-       si->meta_pages = sbi->meta_inode->i_mapping->nrpages;
+       si->meta_pages = META_MAPPING(sbi)->nrpages;
        si->nats = NM_I(sbi)->nat_cnt;
        si->sits = SIT_I(sbi)->dirty_sentries;
        si->fnids = NM_I(sbi)->fcnt;
@@ -168,7 +168,7 @@ get_cache:
        si->cache_mem += NM_I(sbi)->nat_cnt;
        npages = sbi->node_inode->i_mapping->nrpages;
        si->cache_mem += npages << PAGE_CACHE_SHIFT;
-       npages = sbi->meta_inode->i_mapping->nrpages;
+       npages = META_MAPPING(sbi)->nrpages;
        si->cache_mem += npages << PAGE_CACHE_SHIFT;
        si->cache_mem += sbi->n_orphans * sizeof(struct orphan_inode_entry);
        si->cache_mem += sbi->n_dirty_dirs * sizeof(struct dir_inode_entry);

diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 5ab3981..117e30f 100644 (file)
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -533,6 +533,11 @@ static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi)
        return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info);
 }
 
+static inline struct address_space *META_MAPPING(struct f2fs_sb_info *sbi)
+{
+       return sbi->meta_inode->i_mapping;
+}
+
 static inline void F2FS_SET_SB_DIRT(struct f2fs_sb_info *sbi)
 {
        sbi->s_dirty = 1;

diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 226a05a..527bd12 100644 (file)
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -87,7 +87,7 @@ static struct page *get_next_nat_page(struct f2fs_sb_info *sbi, nid_t nid)
  */
 static void ra_nat_pages(struct f2fs_sb_info *sbi, int nid)
 {
-       struct address_space *mapping = sbi->meta_inode->i_mapping;
+       struct address_space *mapping = META_MAPPING(sbi);
        struct f2fs_nm_info *nm_i = NM_I(sbi);
        struct page *page;
        pgoff_t index;

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index e82423f..7caac5f 100644 (file)
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1585,7 +1585,7 @@ static int build_curseg(struct f2fs_sb_info *sbi)
 
 static int ra_sit_pages(struct f2fs_sb_info *sbi, int start, int nrpages)
 {
-       struct address_space *mapping = sbi->meta_inode->i_mapping;
+       struct address_space *mapping = META_MAPPING(sbi);
        struct page *page;
        block_t blk_addr, prev_blk_addr = 0;
        int sit_blk_cnt = SIT_BLK_CNT(sbi);