root/fs/dlm/memory.c

DEFINITIONS

1. dlm_memory_init
2. dlm_memory_exit
3. dlm_allocate_lvb
4. dlm_free_lvb
5. dlm_allocate_rsb
6. dlm_free_rsb
7. dlm_allocate_lkb
8. dlm_free_lkb

/******************************************************************************
*******************************************************************************
**
**  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
**  Copyright (C) 2004-2007 Red Hat, Inc.  All rights reserved.
**
**  This copyrighted material is made available to anyone wishing to use,
**  modify, copy, or redistribute it subject to the terms and conditions
**  of the GNU General Public License v.2.
**
*******************************************************************************
******************************************************************************/

#include "dlm_internal.h"
#include "config.h"
#include "memory.h"

static struct kmem_cache *lkb_cache;


int __init dlm_memory_init(void)
{
        int ret = 0;

        lkb_cache = kmem_cache_create("dlm_lkb", sizeof(struct dlm_lkb),
                                __alignof__(struct dlm_lkb), 0, NULL);
        if (!lkb_cache)
                ret = -ENOMEM;
        return ret;
}

void dlm_memory_exit(void)
{
        if (lkb_cache)
                kmem_cache_destroy(lkb_cache);
}

char *dlm_allocate_lvb(struct dlm_ls *ls)
{
        char *p;

        p = kzalloc(ls->ls_lvblen, GFP_KERNEL);
        return p;
}

void dlm_free_lvb(char *p)
{
        kfree(p);
}

/* FIXME: have some minimal space built-in to rsb for the name and
   kmalloc a separate name if needed, like dentries are done */

struct dlm_rsb *dlm_allocate_rsb(struct dlm_ls *ls, int namelen)
{
        struct dlm_rsb *r;

        DLM_ASSERT(namelen <= DLM_RESNAME_MAXLEN,);

        r = kzalloc(sizeof(*r) + namelen, GFP_KERNEL);
        return r;
}

void dlm_free_rsb(struct dlm_rsb *r)
{
        if (r->res_lvbptr)
                dlm_free_lvb(r->res_lvbptr);
        kfree(r);
}

struct dlm_lkb *dlm_allocate_lkb(struct dlm_ls *ls)
{
        struct dlm_lkb *lkb;

        lkb = kmem_cache_zalloc(lkb_cache, GFP_KERNEL);
        return lkb;
}

void dlm_free_lkb(struct dlm_lkb *lkb)
{
        if (lkb->lkb_flags & DLM_IFL_USER) {
                struct dlm_user_args *ua;
                ua = lkb->lkb_ua;
                if (ua) {
                        if (ua->lksb.sb_lvbptr)
                                kfree(ua->lksb.sb_lvbptr);
                        kfree(ua);
                }
        }
        kmem_cache_free(lkb_cache, lkb);
}