1 /* $Id: commit.c,v 1.16 2002-08-02 19:26:55 adam Exp $
2 Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002
5 This file is part of the Zebra server.
7 Zebra is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 Zebra is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with Zebra; see the file LICENSE.zebra. If not, write to the
19 Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
32 #define CF_OPTIMIZE_COMMIT 0
34 void cf_unlink (CFile cf)
36 if (cf->bucket_in_memory)
38 logf (LOG_FATAL, "Cannot unlink potential dirty cache");
43 mf_unlink (cf->block_mf);
44 mf_unlink (cf->hash_mf);
48 #if CF_OPTIMIZE_COMMIT
49 struct map_cache_entity {
58 struct map_cache_entity *map;
63 static struct map_cache *map_cache_init (CFile cf)
65 int mem_max = 2000000;
66 struct map_cache *m_p;
68 m_p = xmalloc (sizeof(*m_p));
70 m_p->max = mem_max / cf->head.block_size;
71 m_p->buf = xmalloc (mem_max);
73 m_p->map = xmalloc (sizeof(*m_p->map) * m_p->max);
77 static int map_cache_cmp_from (const void *p1, const void *p2)
79 return ((struct map_cache_entity*) p1)->from -
80 ((struct map_cache_entity*) p2)->from;
83 static int map_cache_cmp_to (const void *p1, const void *p2)
85 return ((struct map_cache_entity*) p1)->to -
86 ((struct map_cache_entity*) p2)->to;
89 static void map_cache_flush (struct map_cache *m_p)
93 qsort (m_p->map, m_p->no, sizeof(*m_p->map), map_cache_cmp_from);
94 assert (m_p->no < 2 || m_p->map[0].from < m_p->map[1].from);
95 for (i = 0; i<m_p->no; i++)
97 if (!mf_read (m_p->cf->block_mf, m_p->map[i].from, 0, 0,
98 m_p->buf + i * m_p->cf->head.block_size))
100 logf (LOG_FATAL, "read commit block at position %d",
104 m_p->map[i].from = i;
106 qsort (m_p->map, m_p->no, sizeof(*m_p->map), map_cache_cmp_to);
107 assert (m_p->no < 2 || m_p->map[0].to < m_p->map[1].to);
108 for (i = 0; i<m_p->no; i++)
110 mf_write (m_p->cf->rmf, m_p->map[i].to, 0, 0,
111 m_p->buf + m_p->map[i].from * m_p->cf->head.block_size);
116 static void map_cache_del (struct map_cache *m_p)
118 map_cache_flush (m_p);
124 static void map_cache_add (struct map_cache *m_p, int from, int to)
128 m_p->map[i].from = from;
132 map_cache_flush (m_p);
135 /* CF_OPTIMIZE_COMMIT */
138 static void cf_commit_hash (CFile cf)
142 struct CFile_ph_bucket *p;
143 #if CF_OPTIMIZE_COMMIT
144 struct map_cache *m_p;
147 #if CF_OPTIMIZE_COMMIT
148 m_p = map_cache_init (cf);
151 p = (struct CFile_ph_bucket *) xmalloc (sizeof(*p));
152 hash_bytes = cf->head.hash_size * sizeof(int);
153 bucket_no = cf->head.first_bucket;
154 for (; bucket_no < cf->head.next_bucket; bucket_no++)
156 if (!mf_read (cf->hash_mf, bucket_no, 0, 0, p))
158 logf (LOG_FATAL, "read commit hash");
161 for (i = 0; i<HASH_BUCKET && p->vno[i]; i++)
163 #if CF_OPTIMIZE_COMMIT
164 map_cache_add (m_p, p->vno[i], p->no[i]);
166 if (!mf_read (cf->block_mf, p->vno[i], 0, 0, cf->iobuf))
168 logf (LOG_FATAL, "read commit block");
171 mf_write (cf->rmf, p->no[i], 0, 0, cf->iobuf);
175 #if CF_OPTIMIZE_COMMIT
181 static void cf_commit_flat (CFile cf)
187 #if CF_OPTIMIZE_COMMIT
188 struct map_cache *m_p;
192 #if CF_OPTIMIZE_COMMIT
193 m_p = map_cache_init (cf);
195 fp = (int *) xmalloc (HASH_BSIZE);
196 for (hno = cf->head.next_bucket; hno < cf->head.flat_bucket; hno++)
198 for (i = 0; i < (int) (HASH_BSIZE/sizeof(int)); i++)
200 if (!mf_read (cf->hash_mf, hno, 0, 0, fp) &&
201 hno != cf->head.flat_bucket-1)
203 logf (LOG_FATAL, "read index block hno=%d (%d-%d) commit",
204 hno, cf->head.next_bucket, cf->head.flat_bucket-1);
206 for (i = 0; i < (int) (HASH_BSIZE/sizeof(int)); i++)
210 #if CF_OPTIMIZE_COMMIT
211 map_cache_add (m_p, fp[i], vno);
213 if (!mf_read (cf->block_mf, fp[i], 0, 0, cf->iobuf))
215 logf (LOG_FATAL, "read data block hno=%d (%d-%d) "
216 "i=%d commit block at %d (->%d)",
217 hno, cf->head.next_bucket, cf->head.flat_bucket-1,
221 mf_write (cf->rmf, vno, 0, 0, cf->iobuf);
228 #if CF_OPTIMIZE_COMMIT
234 void cf_commit (CFile cf)
237 if (cf->bucket_in_memory)
239 logf (LOG_FATAL, "Cannot commit potential dirty cache");
242 if (cf->head.state == 1)
244 else if (cf->head.state == 2)