ceph: don't include used caps in cap_wanted (41445999) · Commits · 戴 / test

when copying files to cephfs, file data may stay in page cache after corresponding file is closed. Cached data use Fc capability. If we include Fc capability in cap_wanted, MDS will treat files with cached data as open files, and journal them in an EOpen event when trimming log segment. Signed-off-by:

Yan, Zheng <zyan@redhat.com>

fs/ceph/caps.c

+3 −3

Original line number	Diff line number	Diff line
		@@ -1525,13 +1525,13 @@ retry:
		retry_locked:
		file_wanted = __ceph_caps_file_wanted(ci);
		used = __ceph_caps_used(ci);
		want = file_wanted \| used;
		issued = __ceph_caps_issued(ci, &implemented);
		revoking = implemented & ~issued;

		retain = want \| CEPH_CAP_PIN;
		want = file_wanted;
		retain = file_wanted \| used \| CEPH_CAP_PIN;
		if (!mdsc->stopping && inode->i_nlink > 0) {
		if (want) {
		if (file_wanted) {
		retain \|= CEPH_CAP_ANY; /* be greedy */
		} else if (S_ISDIR(inode->i_mode) &&
		(issued & CEPH_CAP_FILE_SHARED) &&

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