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| author | Jeff Layton <jlayton@kernel.org> | 2020-03-18 15:34:20 -0400 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2020-06-01 13:22:52 +0200 |
| commit | d7dbfb4f2bdb037758f46271f75ea6c8d35626b4 (patch) | |
| tree | 25abcdbae29060e0d69c1c8661d175093b37688b | |
| parent | 681ac634883ba162ce5c50c10120c8bf4df81574 (diff) | |
| download | linux-d7dbfb4f2bdb037758f46271f75ea6c8d35626b4.tar.bz2 | |
ceph: add comments for handle_cap_flush_ack logic
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
| -rw-r--r-- | fs/ceph/caps.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index 74d05e5db68d..056ad0d99438 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -3471,14 +3471,26 @@ static void handle_cap_flush_ack(struct inode *inode, u64 flush_tid, bool wake_mdsc = false; list_for_each_entry_safe(cf, tmp_cf, &ci->i_cap_flush_list, i_list) { + /* Is this the one that was flushed? */ if (cf->tid == flush_tid) cleaned = cf->caps; - if (cf->caps == 0) /* capsnap */ + + /* Is this a capsnap? */ + if (cf->caps == 0) continue; + if (cf->tid <= flush_tid) { + /* + * An earlier or current tid. The FLUSH_ACK should + * represent a superset of this flush's caps. + */ wake_ci |= __detach_cap_flush_from_ci(ci, cf); list_add_tail(&cf->i_list, &to_remove); } else { + /* + * This is a later one. Any caps in it are still dirty + * so don't count them as cleaned. + */ cleaned &= ~cf->caps; if (!cleaned) break; |