linux-imx

/*

 * Copyright (c) 2002, 2007 Red Hat, Inc. All rights reserved.

 *

 * This software may be freely redistributed under the terms of the

 * GNU General Public License.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

 *

 * Authors: David Woodhouse <dwmw2@infradead.org>

 *          David Howells <dhowells@redhat.com>

 *

 */

​

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/circ_buf.h>

#include <linux/sched.h>

#include "internal.h"

​

/*

 * Create volume and callback interests on a server.

 */

static struct afs_cb_interest *afs_create_interest(struct afs_server *server,

                           struct afs_vnode *vnode)

{

    struct afs_vol_interest *new_vi, *vi;

    struct afs_cb_interest *new;

    struct hlist_node **pp;

​

    new_vi = kzalloc(sizeof(struct afs_vol_interest), GFP_KERNEL);

    if (!new_vi)

        return NULL;

​

    new = kzalloc(sizeof(struct afs_cb_interest), GFP_KERNEL);

    if (!new) {

        kfree(new_vi);

        return NULL;

    }

​

    new_vi->usage = 1;

    new_vi->vid = vnode->volume->vid;

    INIT_HLIST_NODE(&new_vi->srv_link);

    INIT_HLIST_HEAD(&new_vi->cb_interests);

​

    refcount_set(&new->usage, 1);

    new->sb = vnode->vfs_inode.i_sb;

    new->vid = vnode->volume->vid;

    new->server = afs_get_server(server);

    INIT_HLIST_NODE(&new->cb_vlink);

​

    write_lock(&server->cb_break_lock);

​

    for (pp = &server->cb_volumes.first; *pp; pp = &(*pp)->next) {

        vi = hlist_entry(*pp, struct afs_vol_interest, srv_link);

        if (vi->vid < new_vi->vid)

            continue;

        if (vi->vid > new_vi->vid)

            break;

        vi->usage++;

        goto found_vi;