From a00c2d59e914b8ec46f1637e2e283aa35583c455 Mon Sep 17 00:00:00 2001 From: Vivek Goyal Date: Fri, 11 May 2018 11:49:32 -0400 Subject: ovl: Add an inode flag OVL_CONST_INO Add an ovl_inode flag OVL_CONST_INO. This flag signifies if inode number will remain constant over copy up or not. This flag does not get updated over copy up and remains unmodifed after setting once. Next patch in the series will make use of this flag. It will basically figure out if dentry is of type ORIGIN or not. And this can be derived by this flag. ORIGIN = (upperdentry && ovl_test_flag(OVL_CONST_INO, inode)). Suggested-by: Amir Goldstein Signed-off-by: Vivek Goyal Reviewed-by: Amir Goldstein Signed-off-by: Miklos Szeredi --- fs/overlayfs/inode.c | 3 +++ fs/overlayfs/overlayfs.h | 2 ++ 2 files changed, 5 insertions(+) (limited to 'fs/overlayfs') diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c index 12553274eae7..7c7092aaf9b4 100644 --- a/fs/overlayfs/inode.c +++ b/fs/overlayfs/inode.c @@ -883,6 +883,9 @@ struct inode *ovl_get_inode(struct super_block *sb, OVL_I(inode)->redirect = oip->redirect; + if (bylower) + ovl_set_flag(OVL_CONST_INO, inode); + /* Check for non-merge dir that may have whiteouts */ if (is_dir) { if (((upperdentry && lowerdentry) || oip->numlower > 1) || diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h index 99f793904801..a6b466b30f2b 100644 --- a/fs/overlayfs/overlayfs.h +++ b/fs/overlayfs/overlayfs.h @@ -38,6 +38,8 @@ enum ovl_inode_flag { OVL_WHITEOUTS, OVL_INDEX, OVL_UPPERDATA, + /* Inode number will remain constant over copy up. */ + OVL_CONST_INO, }; enum ovl_entry_flag { -- cgit