forked from Minki/linux
597d0cae0f
This changes the way the dlm handles user locks. The core dlm is now aware of user locks so they can be dealt with more efficiently. There is no more dlm_device module which previously managed its own duplicate copy of every user lock. Signed-off-by: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
116 lines
2.4 KiB
C
116 lines
2.4 KiB
C
/******************************************************************************
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*******************************************************************************
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**
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** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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** Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
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**
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** This copyrighted material is made available to anyone wishing to use,
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** modify, copy, or redistribute it subject to the terms and conditions
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** of the GNU General Public License v.2.
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**
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*******************************************************************************
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******************************************************************************/
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#include "dlm_internal.h"
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#include "config.h"
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#include "memory.h"
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static kmem_cache_t *lkb_cache;
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int dlm_memory_init(void)
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{
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int ret = 0;
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lkb_cache = kmem_cache_create("dlm_lkb", sizeof(struct dlm_lkb),
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__alignof__(struct dlm_lkb), 0, NULL, NULL);
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if (!lkb_cache)
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ret = -ENOMEM;
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return ret;
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}
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void dlm_memory_exit(void)
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{
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if (lkb_cache)
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kmem_cache_destroy(lkb_cache);
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}
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char *allocate_lvb(struct dlm_ls *ls)
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{
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char *p;
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p = kmalloc(ls->ls_lvblen, GFP_KERNEL);
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if (p)
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memset(p, 0, ls->ls_lvblen);
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return p;
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}
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void free_lvb(char *p)
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{
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kfree(p);
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}
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/* FIXME: have some minimal space built-in to rsb for the name and
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kmalloc a separate name if needed, like dentries are done */
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struct dlm_rsb *allocate_rsb(struct dlm_ls *ls, int namelen)
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{
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struct dlm_rsb *r;
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DLM_ASSERT(namelen <= DLM_RESNAME_MAXLEN,);
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r = kmalloc(sizeof(*r) + namelen, GFP_KERNEL);
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if (r)
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memset(r, 0, sizeof(*r) + namelen);
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return r;
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}
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void free_rsb(struct dlm_rsb *r)
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{
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if (r->res_lvbptr)
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free_lvb(r->res_lvbptr);
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kfree(r);
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}
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struct dlm_lkb *allocate_lkb(struct dlm_ls *ls)
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{
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struct dlm_lkb *lkb;
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lkb = kmem_cache_alloc(lkb_cache, GFP_KERNEL);
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if (lkb)
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memset(lkb, 0, sizeof(*lkb));
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return lkb;
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}
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void free_lkb(struct dlm_lkb *lkb)
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{
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if (lkb->lkb_flags & DLM_IFL_USER) {
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struct dlm_user_args *ua;
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ua = (struct dlm_user_args *)lkb->lkb_astparam;
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if (ua) {
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if (ua->lksb.sb_lvbptr)
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kfree(ua->lksb.sb_lvbptr);
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kfree(ua);
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}
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}
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kmem_cache_free(lkb_cache, lkb);
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}
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struct dlm_direntry *allocate_direntry(struct dlm_ls *ls, int namelen)
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{
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struct dlm_direntry *de;
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DLM_ASSERT(namelen <= DLM_RESNAME_MAXLEN,);
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de = kmalloc(sizeof(*de) + namelen, GFP_KERNEL);
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if (de)
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memset(de, 0, sizeof(*de) + namelen);
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return de;
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}
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void free_direntry(struct dlm_direntry *de)
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{
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kfree(de);
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}
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