f2fs: merge {invalidate,release}page for meta/node/data pages

This patch merges ->{invalidate,release}page function for meta/node/data pages.

After this, duplication of codes could be removed.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

4 files changed, 22 insertions, 51 deletions

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 470fa58606b2..31a715b5fd5c 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -309,32 +309,12 @@ static int f2fs_set_meta_page_dirty(struct page *page)
         return 0;
 }
 
-static void f2fs_invalidate_meta_page(struct page *page, unsigned int offset,
-                                      unsigned int length)
-{
-        struct inode *inode = page->mapping->host;
-
-        if (PageDirty(page))
-                dec_page_count(F2FS_I_SB(inode), F2FS_DIRTY_META);
-        ClearPagePrivate(page);
-}
-
-static int f2fs_release_meta_page(struct page *page, gfp_t wait)
-{
-        /* If this is dirty page, keep PagePrivate */
-        if (PageDirty(page))
-                return 0;
-
-        ClearPagePrivate(page);
-        return 1;
-}
-
 const struct address_space_operations f2fs_meta_aops = {
         .writepage      = f2fs_write_meta_page,
         .writepages     = f2fs_write_meta_pages,
         .set_page_dirty = f2fs_set_meta_page_dirty,
-        .invalidatepage = f2fs_invalidate_meta_page,
-        .releasepage    = f2fs_release_meta_page,
+        .invalidatepage = f2fs_invalidate_page,
+        .releasepage    = f2fs_release_page,
 };
 
 static void __add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 27dc3fd9fb60..d166557ca867 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1115,20 +1115,28 @@ static ssize_t f2fs_direct_IO(int rw, struct kiocb *iocb,
         return err;
 }
 
-static void f2fs_invalidate_data_page(struct page *page, unsigned int offset,
-                                      unsigned int length)
+void f2fs_invalidate_page(struct page *page, unsigned int offset,
+                                                        unsigned int length)
 {
         struct inode *inode = page->mapping->host;
+        struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 
-        if (offset % PAGE_CACHE_SIZE || length != PAGE_CACHE_SIZE)
+        if (inode->i_ino >= F2FS_ROOT_INO(sbi) &&
+                (offset % PAGE_CACHE_SIZE || length != PAGE_CACHE_SIZE))
                 return;
 
-        if (PageDirty(page))
-                inode_dec_dirty_pages(inode);
+        if (PageDirty(page)) {
+                if (inode->i_ino == F2FS_META_INO(sbi))
+                        dec_page_count(sbi, F2FS_DIRTY_META);
+                else if (inode->i_ino == F2FS_NODE_INO(sbi))
+                        dec_page_count(sbi, F2FS_DIRTY_NODES);
+                else
+                        inode_dec_dirty_pages(inode);
+        }
         ClearPagePrivate(page);
 }
 
-static int f2fs_release_data_page(struct page *page, gfp_t wait)
+int f2fs_release_page(struct page *page, gfp_t wait)
 {
         /* If this is dirty page, keep PagePrivate */
         if (PageDirty(page))
@@ -1183,8 +1191,8 @@ const struct address_space_operations f2fs_dblock_aops = {
         .write_begin    = f2fs_write_begin,
         .write_end      = f2fs_write_end,
         .set_page_dirty = f2fs_set_data_page_dirty,
-        .invalidatepage = f2fs_invalidate_data_page,
-        .releasepage    = f2fs_release_data_page,
+        .invalidatepage = f2fs_invalidate_page,
+        .releasepage    = f2fs_release_page,
         .direct_IO      = f2fs_direct_IO,
         .bmap           = f2fs_bmap,
 };
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 964c240c287f..db1ff55de0bc 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1520,6 +1520,8 @@ struct page *get_lock_data_page(struct inode *, pgoff_t);
 struct page *get_new_data_page(struct inode *, struct page *, pgoff_t, bool);
 int do_write_data_page(struct page *, struct f2fs_io_info *);
 int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *, u64, u64);
+void f2fs_invalidate_page(struct page *, unsigned int, unsigned int);
+int f2fs_release_page(struct page *, gfp_t);
 
 /*
  * gc.c
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 9feda386ed80..ea22c3210c8a 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -1370,25 +1370,6 @@ static int f2fs_set_node_page_dirty(struct page *page)
         return 0;
 }
 
-static void f2fs_invalidate_node_page(struct page *page, unsigned int offset,
-                                      unsigned int length)
-{
-        struct inode *inode = page->mapping->host;
-        if (PageDirty(page))
-                dec_page_count(F2FS_I_SB(inode), F2FS_DIRTY_NODES);
-        ClearPagePrivate(page);
-}
-
-static int f2fs_release_node_page(struct page *page, gfp_t wait)
-{
-        /* If this is dirty page, keep PagePrivate */
-        if (PageDirty(page))
-                return 0;
-
-        ClearPagePrivate(page);
-        return 1;
-}
-
 /*
  * Structure of the f2fs node operations
  */
@@ -1396,8 +1377,8 @@ const struct address_space_operations f2fs_node_aops = {
         .writepage      = f2fs_write_node_page,
         .writepages     = f2fs_write_node_pages,
         .set_page_dirty = f2fs_set_node_page_dirty,
-        .invalidatepage = f2fs_invalidate_node_page,
-        .releasepage    = f2fs_release_node_page,
+        .invalidatepage = f2fs_invalidate_page,
+        .releasepage    = f2fs_release_page,
 };
 
 static struct free_nid *__lookup_free_nid_list(struct f2fs_nm_info *nm_i,