[ Resend to trigger my patchwork updates, and Cc linux-trace-kernel ]
A couple of fixes to eventfs:
- With the usage of simple_recursive_remove() recommended by Al Viro,
the code should not be calling "d_invalidate()" itself. Doing so
is causing crashes. The code was calling d_invalidate() on the race
of trying to look up a file while the parent was being deleted.
This was detected, and the added dentry was having d_invalidate() called
on it, but the deletion of the directory was also calling d_invalidate()
on that same dentry.
- A fix to not free the eventfs_inode (ei) until the last dput() was called
on its ei->dentry made the ei->dentry exist even after it was marked
for free by setting the ei->is_freed. But code elsewhere still was
checking if ei->dentry was NULL if ei->is_freed is set and would
trigger WARN_ON if that was the case. That's no longer true and there
should not be any warnings when it is true.
Steven Rostedt (Google) (2):
eventfs: Remove expectation that ei->is_freed means ei->dentry == NULL
eventfs: Do not invalidate dentry in create_file/dir_dentry()
----
fs/tracefs/event_inode.c | 41 ++++++++++++++++++-----------------------
1 file changed, 18 insertions(+), 23 deletions(-)
