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Commit 32ec4397 authored by Yan, Zheng's avatar Yan, Zheng Committed by Ilya Dryomov
Browse files

ceph: hold on to exclusive caps on complete directories 



If a directory is complete, we want to keep the exclusive
cap. So that MDS does not end up revoking the shared cap
on every create/unlink operation.

Signed-off-by: default avatarYan, Zheng <zyan@redhat.com>
parent 9571eb4f

fs/ceph/caps.c

+12 −0
Original line number Diff line number Diff line
@@ -1561,7 +1561,19 @@ void ceph_check_caps(struct ceph_inode_info *ci, int flags, 
	if (!mdsc->stopping && inode->i_nlink > 0) {

		if (want) {

			retain |= CEPH_CAP_ANY;       /* be greedy */

		} else if (S_ISDIR(inode->i_mode) &&

			   (issued & CEPH_CAP_FILE_SHARED) &&

			    __ceph_dir_is_complete(ci)) {

			/*

			 * If a directory is complete, we want to keep

			 * the exclusive cap. So that MDS does not end up

			 * revoking the shared cap on every create/unlink

			 * operation.

			 */

			want = CEPH_CAP_ANY_SHARED | CEPH_CAP_FILE_EXCL;

			retain |= want;

		} else {



			retain |= CEPH_CAP_ANY_SHARED;

			/*

			 * keep RD only if we didn't have the file open RW,