kernel/fs/ceph/inode.c, branch linux-5.1.y

ceph: handle the case where a dentry has been renamed on outstanding req

2019-04-23T19:37:54Z

It's possible for us to issue a lookup to revalidate a dentry concurrently with a rename. If done in the right order, then we could end up processing dentry info in the reply that no longer reflects the state of the dentry. If req->r_dentry->d_name differs from the one in the trace, then just ignore the trace in the reply. We only need to do this however if the parent's i_rwsem is not held. Signed-off-by: Jeff Layton Reviewed-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov

ceph: fix use-after-free on symlink traversal

2019-03-27T18:00:37Z

free the symlink body after the same RCU delay we have for freeing the struct inode itself, so that traversal during RCU pathwalk wouldn't step into freed memory. Signed-off-by: Al Viro Reviewed-by: Jeff Layton Signed-off-by: Ilya Dryomov

ceph: periodically trim stale dentries

2019-03-05T17:55:17Z

Previous commit make VFS delete stale dentry when last reference is dropped. Lease also can become invalid when corresponding dentry has no reference. This patch make cephfs periodically scan lease list, delete corresponding dentry if lease is invalid. There are two types of lease, dentry lease and dir lease. dentry lease has life time and applies to singe dentry. Dentry lease is added to tail of a list when it's updated, leases at front of the list will expire first. Dir lease is CEPH_CAP_FILE_SHARED on directory inode, it applies to all dentries in the directory. Dentries have dir leases are added to another list. Dentries in the list are periodically checked in a round robin manner. Signed-off-by: "Yan, Zheng" Reviewed-by: Jeff Layton Signed-off-by: Ilya Dryomov

ceph: delete stale dentry when last reference is dropped

2019-03-05T17:55:17Z

introduce ceph_d_delete(), which checks if dentry has valid lease. Signed-off-by: "Yan, Zheng" Reviewed-by: Jeff Layton Signed-off-by: Ilya Dryomov

ceph: send cap releases more aggressively

2019-03-05T17:55:16Z

When pending cap releases fill up one message, start a work to send cap release message. (old way is sending cap releases every 5 seconds) Signed-off-by: "Yan, Zheng" Reviewed-by: Jeff Layton Signed-off-by: Ilya Dryomov

ceph: support getting ceph.dir.pin vxattr

2019-03-05T17:55:16Z

Link: http://tracker.ceph.com/issues/37576 Signed-off-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov

ceph: map snapid to anonymous bdev ID

2019-03-05T17:55:16Z

ceph_getattr() return zero dev ID for head inodes and set dev ID to snapid directly for snaphost inodes. This is not good because userspace utilities may consider device ID of 0 as invalid, snapid may conflict with other device's ID. This patch introduces "snapids to anonymous bdev IDs" map. we create a new mapping when we see a snapid for the first time. we trim unused mapping after it is ilde for 5 minutes. Link: http://tracker.ceph.com/issues/22353 Signed-off-by: "Yan, Zheng" Acked-by: Jeff Layton Signed-off-by: Ilya Dryomov

ceph: set special inode's blocksize to page size

2019-03-05T17:55:16Z

Signed-off-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov

ceph: cleanup splice_dentry()

2018-12-26T14:56:03Z

splice_dentry() may drop the original dentry and return other dentry. It relies on its caller to update pointer that points to the dropped dentry. This is error-prone. Signed-off-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov

ceph: check if LOOKUPNAME request was aborted when filling trace

2018-10-22T08:28:20Z

d_lookup()/d_alloc() require parent inode locked. Parent inode is not locked if request is aborted. Signed-off-by: "Yan, Zheng" Reviewed-by: Jeff Layton Signed-off-by: Ilya Dryomov