[PATCH v6 05/17] vfs: add try_break_deleg calls for parents to vfs_{link,rename,unlink}
From: Jeff Layton <jlayton@kernel.org>
Date: 2025-11-11 14:13:20
Also in:
linux-cifs, linux-fsdevel, linux-nfs, linux-unionfs, linux-xfs, lkml, netdev, netfs
Subsystem:
filesystems (vfs and infrastructure), the rest · Maintainers:
Alexander Viro, Christian Brauner, Linus Torvalds
In order to add directory delegation support, we need to break delegations on the parent whenever there is going to be a change in the directory. vfs_link, vfs_unlink, and vfs_rename all have existing delegation break handling for the children in the rename. Add the necessary calls for breaking delegations in the parent(s) as well. Reviewed-by: Jan Kara <jack@suse.cz> Reviewed-by: NeilBrown <neil@brown.name> Signed-off-by: Jeff Layton <jlayton@kernel.org> --- fs/namei.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/fs/namei.c b/fs/namei.c
index bf42f146f847a5330fc581595c7256af28d9db90..5bcf3e93d350ffd290f72725c378d3dffeeae364 100644
--- a/fs/namei.c
+++ b/fs/namei.c@@ -4667,6 +4667,9 @@ int vfs_unlink(struct mnt_idmap *idmap, struct inode *dir, else { error = security_inode_unlink(dir, dentry); if (!error) { + error = try_break_deleg(dir, delegated_inode); + if (error) + goto out; error = try_break_deleg(target, delegated_inode); if (error) goto out;
@@ -4936,7 +4939,9 @@ int vfs_link(struct dentry *old_dentry, struct mnt_idmap *idmap, else if (max_links && inode->i_nlink >= max_links) error = -EMLINK; else { - error = try_break_deleg(inode, delegated_inode); + error = try_break_deleg(dir, delegated_inode); + if (!error) + error = try_break_deleg(inode, delegated_inode); if (!error) error = dir->i_op->link(old_dentry, dir, new_dentry); }
@@ -5203,6 +5208,14 @@ int vfs_rename(struct renamedata *rd) old_dir->i_nlink >= max_links) goto out; } + error = try_break_deleg(old_dir, delegated_inode); + if (error) + goto out; + if (new_dir != old_dir) { + error = try_break_deleg(new_dir, delegated_inode); + if (error) + goto out; + } if (!is_dir) { error = try_break_deleg(source, delegated_inode); if (error)
--
2.51.1