| From 0c6b698a880f7b50f16af918228f4db7273cf814 Mon Sep 17 00:00:00 2001 |
| From: David Howells <dhowells@redhat.com> |
| Date: Wed, 11 Dec 2019 08:56:04 +0000 |
| Subject: [PATCH] afs: Fix creation calls in the dynamic root to fail with |
| EOPNOTSUPP |
| |
| commit 1da4bd9f9d187f53618890d7b66b9628bbec3c70 upstream. |
| |
| Fix the lookup method on the dynamic root directory such that creation |
| calls, such as mkdir, open(O_CREAT), symlink, etc. fail with EOPNOTSUPP |
| rather than failing with some odd error (such as EEXIST). |
| |
| lookup() itself tries to create automount directories when it is invoked. |
| These are cached locally in RAM and not committed to storage. |
| |
| Signed-off-by: David Howells <dhowells@redhat.com> |
| Reviewed-by: Marc Dionne <marc.dionne@auristor.com> |
| Tested-by: Jonathan Billings <jsbillings@jsbillings.org> |
| Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> |
| |
| diff --git a/fs/afs/dynroot.c b/fs/afs/dynroot.c |
| index 9b3b2f1f1fc0..13522d2b0ec9 100644 |
| --- a/fs/afs/dynroot.c |
| +++ b/fs/afs/dynroot.c |
| @@ -141,6 +141,9 @@ static struct dentry *afs_dynroot_lookup(struct inode *dir, struct dentry *dentr |
| |
| ASSERTCMP(d_inode(dentry), ==, NULL); |
| |
| + if (flags & LOOKUP_CREATE) |
| + return ERR_PTR(-EOPNOTSUPP); |
| + |
| if (dentry->d_name.len >= AFSNAMEMAX) { |
| _leave(" = -ENAMETOOLONG"); |
| return ERR_PTR(-ENAMETOOLONG); |
| -- |
| 2.7.4 |
| |
