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authorYan, Zheng <zyan@redhat.com>2015-06-16 20:48:56 +0800
committerIlya Dryomov <idryomov@gmail.com>2015-06-25 11:49:32 +0300
commitfdd4e15838e59c394a1ec4963b57c22c12608685 (patch)
treeb5486f7b0f12abf9ed670d187f4841dfdb2aa13e /fs/ceph/mds_client.h
parentb459be739f97e2062b2ba77cfe8ea198dbd58904 (diff)
downloadlinux-fdd4e15838e59c394a1ec4963b57c22c12608685.tar.bz2
ceph: rework dcache readdir
Previously our dcache readdir code relies on that child dentries in directory dentry's d_subdir list are sorted by dentry's offset in descending order. When adding dentries to the dcache, if a dentry already exists, our readdir code moves it to head of directory dentry's d_subdir list. This design relies on dcache internals. Al Viro suggests using ncpfs's approach: keeping array of pointers to dentries in page cache of directory inode. the validity of those pointers are presented by directory inode's complete and ordered flags. When a dentry gets pruned, we clear directory inode's complete flag in the d_prune() callback. Before moving a dentry to other directory, we clear the ordered flag for both old and new directory. Signed-off-by: Yan, Zheng <zyan@redhat.com>
Diffstat (limited to 'fs/ceph/mds_client.h')
-rw-r--r--fs/ceph/mds_client.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/ceph/mds_client.h b/fs/ceph/mds_client.h
index 470be4eb25f3..762757e6cebf 100644
--- a/fs/ceph/mds_client.h
+++ b/fs/ceph/mds_client.h
@@ -253,6 +253,9 @@ struct ceph_mds_request {
bool r_got_unsafe, r_got_safe, r_got_result;
bool r_did_prepopulate;
+ long long r_dir_release_cnt;
+ long long r_dir_ordered_cnt;
+ int r_readdir_cache_idx;
u32 r_readdir_offset;
struct ceph_cap_reservation r_caps_reservation;