[PATCH v3 03/38] vfs: add try_break_deleg calls for parents to vfs_{link,rename,unlink}
From: Jeff Layton <jlayton@kernel.org>
Date: 2025-09-24 18:06:24
Also in:
linux-cifs, linux-doc, linux-fsdevel, linux-nfs, linux-unionfs, linux-xfs, lkml, 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. 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 cd43ff89fbaa38206db2aec4f097ca119819f92e..cd517eb232317d326e6d2fc5a60cb4c7569a137d 100644
--- a/fs/namei.c
+++ b/fs/namei.c@@ -4580,6 +4580,9 @@ 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;
@@ -4849,7 +4852,9 @@ 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); }
@@ -5116,6 +5121,14 @@ 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)
--
2.51.0