[PATCH 50/58] convert logfs to ->evict_inode()

[Al Viro <viro@ftp.linux.org.uk>]

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 fs/logfs/inode.c     |    3 +-
 fs/logfs/logfs.h     |    3 +-
 fs/logfs/readwrite.c |   61 +++++++++++++++++++++++--------------------------
 3 files changed, 31 insertions(+), 36 deletions(-)

diff --git a/fs/logfs/inode.c b/fs/logfs/inode.c
index 7811a2a..78be674 100644
--- a/fs/logfs/inode.c
+++ b/fs/logfs/inode.c
@@ -373,9 +373,8 @@ static void logfs_put_super(struct super_block *sb)
 
 const struct super_operations logfs_super_operations = {
 	.alloc_inode	= logfs_alloc_inode,
-	.clear_inode	= logfs_clear_inode,
-	.delete_inode	= logfs_delete_inode,
 	.destroy_inode	= logfs_destroy_inode,
+	.evict_inode	= logfs_evict_inode,
 	.drop_inode	= logfs_drop_inode,
 	.put_super	= logfs_put_super,
 	.write_inode	= logfs_write_inode,
diff --git a/fs/logfs/logfs.h b/fs/logfs/logfs.h
index 5e65171..5e3b720 100644
--- a/fs/logfs/logfs.h
+++ b/fs/logfs/logfs.h
@@ -529,8 +529,7 @@ void logfs_set_blocks(struct inode *inode, u64 no);
 /* these logically belong into inode.c but actually reside in readwrite.c */
 int logfs_read_inode(struct inode *inode);
 int __logfs_write_inode(struct inode *inode, long flags);
-void logfs_delete_inode(struct inode *inode);
-void logfs_clear_inode(struct inode *inode);
+void logfs_evict_inode(struct inode *inode);
 
 /* journal.c */
 void logfs_write_anchor(struct super_block *sb);
diff --git a/fs/logfs/readwrite.c b/fs/logfs/readwrite.c
index 580d126..6127baf 100644
--- a/fs/logfs/readwrite.c
+++ b/fs/logfs/readwrite.c
@@ -1972,31 +1972,6 @@ static struct page *inode_to_page(struct inode *inode)
 	return page;
 }
 
-/* Cheaper version of write_inode.  All changes are concealed in
- * aliases, which are moved back.  No write to the medium happens.
- */
-void logfs_clear_inode(struct inode *inode)
-{
-	struct super_block *sb = inode->i_sb;
-	struct logfs_inode *li = logfs_inode(inode);
-	struct logfs_block *block = li->li_block;
-	struct page *page;
-
-	/* Only deleted files may be dirty at this point */
-	BUG_ON(inode->i_state & I_DIRTY && inode->i_nlink);
-	if (!block)
-		return;
-	if ((logfs_super(sb)->s_flags & LOGFS_SB_FLAG_SHUTDOWN)) {
-		block->ops->free_block(inode->i_sb, block);
-		return;
-	}
-
-	BUG_ON(inode->i_ino < LOGFS_RESERVED_INOS);
-	page = inode_to_page(inode);
-	BUG_ON(!page); /* FIXME: Use emergency page */
-	logfs_put_write_page(page);
-}
-
 static int do_write_inode(struct inode *inode)
 {
 	struct super_block *sb = inode->i_sb;
@@ -2164,18 +2139,40 @@ static int do_delete_inode(struct inode *inode)
  * ZOMBIE inodes have already been deleted before and should remain dead,
  * if it weren't for valid checking.  No need to kill them again here.
  */
-void logfs_delete_inode(struct inode *inode)
+void logfs_evict_inode(struct inode *inode)
 {
+	struct super_block *sb = inode->i_sb;
 	struct logfs_inode *li = logfs_inode(inode);
+	struct logfs_block *block = li->li_block;
+	struct page *page;
 
-	if (!(li->li_flags & LOGFS_IF_ZOMBIE)) {
-		li->li_flags |= LOGFS_IF_ZOMBIE;
-		if (i_size_read(inode) > 0)
-			logfs_truncate(inode, 0);
-		do_delete_inode(inode);
+	if (!inode->i_nlink) {
+		if (!(li->li_flags & LOGFS_IF_ZOMBIE)) {
+			li->li_flags |= LOGFS_IF_ZOMBIE;
+			if (i_size_read(inode) > 0)
+				logfs_truncate(inode, 0);
+			do_delete_inode(inode);
+		}
 	}
 	truncate_inode_pages(&inode->i_data, 0);
-	clear_inode(inode);
+	end_writeback(inode);
+
+	/* Cheaper version of write_inode.  All changes are concealed in
+	 * aliases, which are moved back.  No write to the medium happens.
+	 */
+	/* Only deleted files may be dirty at this point */
+	BUG_ON(inode->i_state & I_DIRTY && inode->i_nlink);
+	if (!block)
+		return;
+	if ((logfs_super(sb)->s_flags & LOGFS_SB_FLAG_SHUTDOWN)) {
+		block->ops->free_block(inode->i_sb, block);
+		return;
+	}
+
+	BUG_ON(inode->i_ino < LOGFS_RESERVED_INOS);
+	page = inode_to_page(inode);
+	BUG_ON(!page); /* FIXME: Use emergency page */
+	logfs_put_write_page(page);
 }
 
 void btree_write_block(struct logfs_block *block)
-- 
1.5.6.5