Commit 4deb14a2 authored by Yan, Zheng's avatar Yan, Zheng Committed by Ilya Dryomov
Browse files

ceph: optimize flock encoding during reconnect 



Don't malloc if there is no flock.

Signed-off-by: default avatar"Yan, Zheng" <zyan@redhat.com>
Reviewed-by: default avatarJeff Layton <jlayton@redhat.com>
Signed-off-by: default avatarIlya Dryomov <idryomov@gmail.com>
parent c6db8472

fs/ceph/locks.c

+10 −7
Original line number Diff line number Diff line
@@ -431,19 +431,22 @@ int ceph_locks_to_pagelist(struct ceph_filelock *flocks, 
	if (err)

		goto out_fail;



	if (num_fcntl_locks > 0) {

		err = ceph_pagelist_append(pagelist, flocks,

					   num_fcntl_locks * sizeof(*flocks));

		if (err)

			goto out_fail;

	}



	nlocks = cpu_to_le32(num_flock_locks);

	err = ceph_pagelist_append(pagelist, &nlocks, sizeof(nlocks));

	if (err)

		goto out_fail;



	err = ceph_pagelist_append(pagelist,

				   &flocks[num_fcntl_locks],

	if (num_flock_locks > 0) {

		err = ceph_pagelist_append(pagelist, &flocks[num_fcntl_locks],

					   num_flock_locks * sizeof(*flocks));

	}

out_fail:

	return err;

}

fs/ceph/mds_client.c

+20 −14
Original line number Diff line number Diff line
@@ -2899,12 +2899,13 @@ static int encode_caps_cb(struct inode *inode, struct ceph_cap *cap, 


	if (recon_state->msg_version >= 2) {

		int num_fcntl_locks, num_flock_locks;

		struct ceph_filelock *flocks;

		struct ceph_filelock *flocks = NULL;

		size_t struct_len, total_len = 0;

		u8 struct_v = 0;



encode_again:

		ceph_count_locks(inode, &num_fcntl_locks, &num_flock_locks);

		if (num_fcntl_locks + num_flock_locks > 0) {

			flocks = kmalloc((num_fcntl_locks + num_flock_locks) *

					 sizeof(struct ceph_filelock), GFP_NOFS);

			if (!flocks) {
@@ -2916,10 +2917,15 @@ static int encode_caps_cb(struct inode *inode, struct ceph_cap *cap, 
							  num_flock_locks);

			if (err) {

				kfree(flocks);

				flocks = NULL;

				if (err == -ENOSPC)

					goto encode_again;

				goto out_free;

			}

		} else {

			kfree(flocks);

			flocks = NULL;

		}



		if (recon_state->msg_version >= 3) {

			/* version, compat_version and struct_len */