| 1 | |
| 2 | |
| 3 | *******************************************************************************
|
| 4 | **
|
| 5 | ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
|
| 6 | ** Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
|
| 7 | **
|
| 8 | **
|
| 9 | *******************************************************************************
|
| 10 | *****************************************************************************
|
| 11 |
|
| 12 | #include "dlm_internal.h"
|
| 13 | #include "midcomms.h"
|
| 14 | #include "lowcomms.h"
|
| 15 | #include "config.h"
|
| 16 | #include "memory.h"
|
| 17 | #include "ast.h"
|
| 18 |
|
| 19 | static struct kmem_cache *writequeue_cache;
|
| 20 | static struct kmem_cache *mhandle_cache;
|
| 21 | static struct kmem_cache *msg_cache;
|
| 22 | static struct kmem_cache *lkb_cache;
|
| 23 | static struct kmem_cache *rsb_cache;
|
| 24 | static struct kmem_cache *cb_cache;
|
| 25 |
|
| 26 |
|
| 27 | int __init dlm_memory_init(void)
|
| 28 | {
|
| 29 | writequeue_cache = dlm_lowcomms_writequeue_cache_create();
|
| 30 | if (!writequeue_cache)
|
| 31 | goto out;
|
| 32 |
|
| 33 | mhandle_cache = dlm_midcomms_cache_create();
|
| 34 | if (!mhandle_cache)
|
| 35 | goto mhandle;
|
| 36 |
|
| 37 | lkb_cache = kmem_cache_create("dlm_lkb", sizeof(struct dlm_lkb),
|
| 38 | __alignof__(struct dlm_lkb), 0, NULL);
|
| 39 | if (!lkb_cache)
|
| 40 | goto lkb;
|
| 41 |
|
| 42 | msg_cache = dlm_lowcomms_msg_cache_create();
|
| 43 | if (!msg_cache)
|
| 44 | goto msg;
|
| 45 |
|
| 46 | rsb_cache = kmem_cache_create("dlm_rsb", sizeof(struct dlm_rsb),
|
| 47 | __alignof__(struct dlm_rsb), 0, NULL);
|
| 48 | if (!rsb_cache)
|
| 49 | goto rsb;
|
| 50 |
|
| 51 | cb_cache = kmem_cache_create_usercopy("dlm_cb", sizeof(struct dlm_callback),
|
| 52 | __alignof__(struct dlm_callback), 0,
|
| 53 | offsetof(struct dlm_callback, lvbptr),
|
| 54 | sizeof_field(struct dlm_callback, lvbptr),
|
| 55 | NULL);
|
| 56 | if (!cb_cache)
|
| 57 | goto cb;
|
| 58 |
|
| 59 | return 0;
|
| 60 |
|
| 61 | cb:
|
| 62 | kmem_cache_destroy(rsb_cache);
|
| 63 | rsb:
|
| 64 | kmem_cache_destroy(msg_cache);
|
| 65 | msg:
|
| 66 | kmem_cache_destroy(lkb_cache);
|
| 67 | lkb:
|
| 68 | kmem_cache_destroy(mhandle_cache);
|
| 69 | mhandle:
|
| 70 | kmem_cache_destroy(writequeue_cache);
|
| 71 | out:
|
| 72 | return -ENOMEM;
|
| 73 | }
|
| 74 |
|
| 75 | void dlm_memory_exit(void)
|
| 76 | {
|
| 77 | rcu_barrier();
|
| 78 |
|
| 79 | kmem_cache_destroy(writequeue_cache);
|
| 80 | kmem_cache_destroy(mhandle_cache);
|
| 81 | kmem_cache_destroy(msg_cache);
|
| 82 | kmem_cache_destroy(lkb_cache);
|
| 83 | kmem_cache_destroy(rsb_cache);
|
| 84 | kmem_cache_destroy(cb_cache);
|
| 85 | }
|
| 86 |
|
| 87 | char *dlm_allocate_lvb(struct dlm_ls *ls)
|
| 88 | {
|
| 89 | return kzalloc(ls->ls_lvblen, GFP_ATOMIC);
|
| 90 | }
|
| 91 |
|
| 92 | void dlm_free_lvb(char *p)
|
| 93 | {
|
| 94 | kfree(p);
|
| 95 | }
|
| 96 |
|
| 97 | struct dlm_rsb *dlm_allocate_rsb(void)
|
| 98 | {
|
| 99 | return kmem_cache_zalloc(rsb_cache, GFP_ATOMIC);
|
| 100 | }
|
| 101 |
|
| 102 | static void __free_rsb_rcu(struct rcu_head *rcu)
|
| 103 | {
|
| 104 | struct dlm_rsb *r = container_of(rcu, struct dlm_rsb, rcu);
|
| 105 | if (r->res_lvbptr)
|
| 106 | dlm_free_lvb(r->res_lvbptr);
|
| 107 | kmem_cache_free(rsb_cache, r);
|
| 108 | }
|
| 109 |
|
| 110 | void dlm_free_rsb(struct dlm_rsb *r)
|
| 111 | {
|
| 112 | call_rcu(&r->rcu, __free_rsb_rcu);
|
| 113 | }
|
| 114 |
|
| 115 | struct dlm_lkb *dlm_allocate_lkb(void)
|
| 116 | {
|
| 117 | return kmem_cache_zalloc(lkb_cache, GFP_ATOMIC);
|
| 118 | }
|
| 119 |
|
| 120 | static void __free_lkb_rcu(struct rcu_head *rcu)
|
| 121 | {
|
| 122 | struct dlm_lkb *lkb = container_of(rcu, struct dlm_lkb, rcu);
|
| 123 |
|
| 124 | if (test_bit(DLM_DFL_USER_BIT, &lkb->lkb_dflags)) {
|
| 125 | struct dlm_user_args *ua;
|
| 126 | ua = lkb->lkb_ua;
|
| 127 | if (ua) {
|
| 128 | kfree(ua->lksb.sb_lvbptr);
|
| 129 | kfree(ua);
|
| 130 | }
|
| 131 | }
|
| 132 |
|
| 133 | kmem_cache_free(lkb_cache, lkb);
|
| 134 | }
|
| 135 |
|
| 136 | void dlm_free_lkb(struct dlm_lkb *lkb)
|
| 137 | {
|
| 138 | call_rcu(&lkb->rcu, __free_lkb_rcu);
|
| 139 | }
|
| 140 |
|
| 141 | struct dlm_mhandle *dlm_allocate_mhandle(void)
|
| 142 | {
|
| 143 | return kmem_cache_alloc(mhandle_cache, GFP_ATOMIC);
|
| 144 | }
|
| 145 |
|
| 146 | void dlm_free_mhandle(struct dlm_mhandle *mhandle)
|
| 147 | {
|
| 148 | kmem_cache_free(mhandle_cache, mhandle);
|
| 149 | }
|
| 150 |
|
| 151 | struct writequeue_entry *dlm_allocate_writequeue(void)
|
| 152 | {
|
| 153 | return kmem_cache_alloc(writequeue_cache, GFP_ATOMIC);
|
| 154 | }
|
| 155 |
|
| 156 | void dlm_free_writequeue(struct writequeue_entry *writequeue)
|
| 157 | {
|
| 158 | kmem_cache_free(writequeue_cache, writequeue);
|
| 159 | }
|
| 160 |
|
| 161 | struct dlm_msg *dlm_allocate_msg(void)
|
| 162 | {
|
| 163 | return kmem_cache_alloc(msg_cache, GFP_ATOMIC);
|
| 164 | }
|
| 165 |
|
| 166 | void dlm_free_msg(struct dlm_msg *msg)
|
| 167 | {
|
| 168 | kmem_cache_free(msg_cache, msg);
|
| 169 | }
|
| 170 |
|
| 171 | struct dlm_callback *dlm_allocate_cb(void)
|
| 172 | {
|
| 173 | return kmem_cache_alloc(cb_cache, GFP_ATOMIC);
|
| 174 | }
|
| 175 |
|
| 176 | void dlm_free_cb(struct dlm_callback *cb)
|
| 177 | {
|
| 178 | kmem_cache_free(cb_cache, cb);
|
| 179 | }
|