| commit | f3c4ebe65ea149ec892f94474233cfebe9cbe299 | [log] [tgz] |
|---|---|---|
| author | Yan, Zheng <zyan@redhat.com> | Fri Apr 29 11:27:30 2016 +0800 |
| committer | Ilya Dryomov <idryomov@gmail.com> | Thu May 26 01:15:36 2016 +0200 |
| tree | 4a6aa1280fa6160d55935577792cd5d46e18f665 | |
| parent | 076c40f18d10489e29c515bf5936952830df5e16 [diff] |
ceph: using hash value to compose dentry offset If MDS sorts dentries in dirfrag in hash order, we use hash value to compose dentry offset. dentry offset is: (0xff << 52) | ((24 bits hash) << 28) | (the nth entry hash hash collision) This offset is stable across directory fragmentation. This alos means there is no need to reset readdir offset if directory get fragmented in the middle of readdir. Signed-off-by: Yan, Zheng <zyan@redhat.com>