diff mbox series

[RFC,v3,04/10] ovl: implement overlayfs' ->evict_inode operation

Message ID 20201108140307.1385745-5-cgxu519@mykernel.net (mailing list archive)
State New
Headers show
Series implement containerized syncfs for overlayfs | expand

Commit Message

Chengguang Xu Nov. 8, 2020, 2:03 p.m. UTC 
Implement overlayfs' ->evict_inode operation,
so that we can clear all inode dirty flags.

Signed-off-by: Chengguang Xu <cgxu519@mykernel.net>
---
 fs/overlayfs/super.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
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Patch

diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index 1e21feb87297..694eff76eb09 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -391,11 +391,26 @@  static int ovl_remount(struct super_block *sb, int *flags, char *data)
 	return ret;
 }
 
+static void ovl_evict_inode(struct inode *inode)
+{
+	struct ovl_fs *ofs = inode->i_sb->s_fs_info;
+
+	if (!list_empty(&OVL_I(inode)->wait_list)) {
+		spin_lock(&ofs->syncfs_wait_list_lock);
+		if (!list_empty(&OVL_I(inode)->wait_list))
+			list_del(&OVL_I(inode)->wait_list);
+		spin_unlock(&ofs->syncfs_wait_list_lock);
+	}
+	inode->i_state &= ~I_DIRTY_ALL;
+	clear_inode(inode);
+}
+
 static const struct super_operations ovl_super_operations = {
 	.alloc_inode	= ovl_alloc_inode,
 	.free_inode	= ovl_free_inode,
 	.destroy_inode	= ovl_destroy_inode,
 	.drop_inode	= generic_delete_inode,
+	.evict_inode	= ovl_evict_inode,
 	.put_super	= ovl_put_super,
 	.sync_fs	= ovl_sync_fs,
 	.statfs		= ovl_statfs,