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vfs: add try_break_deleg calls for parents to vfs_{link,rename,unlink}

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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>
Link: https://patch.msgid.link/20251111-dir-deleg-ro-v6-5-52f3feebb2f2@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Jeff Layton
2025-11-11 09:12:46 -05:00
committed by Christian Brauner
parent e6d28ebc17
commit b46ebf9a76
1 changed files with 14 additions and 1 deletions
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15
fs/namei.c
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@@ -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)