diff options
| author | Yan, Zheng <zyan@redhat.com> | 2019-01-31 16:55:51 +0800 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2019-03-05 18:55:17 +0100 |
| commit | 37c4efc1ddf98ba8b234d116d863a9464445901e (patch) | |
| tree | 8eae1cafdd6f7be9fef1844375f41cc23b75a912 /fs/ceph/super.h | |
| parent | 1e9c2eb6811e8e017b589b483f6ff2b7c065eef5 (diff) | |
ceph: periodically trim stale dentries
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" <zyan@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs/ceph/super.h')
| -rw-r--r-- | fs/ceph/super.h | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/fs/ceph/super.h b/fs/ceph/super.h index c0654e613fc0..b3bcfb3c27bd 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -262,17 +262,22 @@ struct ceph_inode_xattr { * Ceph dentry state */ struct ceph_dentry_info { + struct dentry *dentry; struct ceph_mds_session *lease_session; + struct list_head lease_list; + unsigned flags; int lease_shared_gen; u32 lease_gen; u32 lease_seq; unsigned long lease_renew_after, lease_renew_from; - struct list_head lru; - struct dentry *dentry; unsigned long time; u64 offset; }; +#define CEPH_DENTRY_REFERENCED 1 +#define CEPH_DENTRY_LEASE_LIST 2 +#define CEPH_DENTRY_SHRINK_LIST 4 + struct ceph_inode_xattrs_info { /* * (still encoded) xattr blob. we avoid the overhead of parsing @@ -1064,10 +1069,10 @@ extern int ceph_handle_snapdir(struct ceph_mds_request *req, extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req, struct dentry *dentry, int err); -extern void ceph_dentry_lru_add(struct dentry *dn); -extern void ceph_dentry_lru_touch(struct dentry *dn); -extern void ceph_dentry_lru_del(struct dentry *dn); +extern void __ceph_dentry_lease_touch(struct ceph_dentry_info *di); +extern void __ceph_dentry_dir_lease_touch(struct ceph_dentry_info *di); extern void ceph_invalidate_dentry_lease(struct dentry *dentry); +extern int ceph_trim_dentries(struct ceph_mds_client *mdsc); extern unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn); extern void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl); |