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/* Copyright (C) 2001-2005 by Hans Reiser, licensing governed by
* reiser4progs/COPYING.
*/
#include "../node40/node40.h"
#include "../node40/node40_repair.h"
#include "node41.h"
#include "node41_repair.h"
#include <aux/crc32c.h>
uint32_t node41_get_csum(reiser4_node_t *entity) {
aal_assert("edward-3", entity != NULL);
return nh41_get_csum((reiser4_node_t *)entity);
}
uint32_t csum_node41(reiser4_node_t *entity, uint32_t check)
{
uint32_t calc;
calc = reiser4_crc32c(~0,
entity->block->data,
sizeof(node40_header_t));
calc = reiser4_crc32c(calc,
entity->block->data + sizeof(node41_header_t),
entity->block->size - sizeof(node41_header_t));
if (check)
return calc == nh41_get_csum(entity);
else {
nh41_set_csum(entity, calc);
return 1;
}
}
reiser4_node_t *node41_prepare(aal_block_t *block, reiser4_key_plug_t *kplug) {
reiser4_node_t *entity;
aal_assert("edward-4", kplug != NULL);
aal_assert("edward-5", block != NULL);
if (!(entity = aal_calloc(sizeof(*entity), 0)))
return NULL;
entity->kplug = kplug;
entity->block = block;
entity->plug = &node41_plug;
entity->keypol = plugcall(kplug, bodysize);
return entity;
}
/* Open the node on the given @block with the given key plugin @kplug. Returns
initialized node instance. */
reiser4_node_t *node41_open(aal_block_t *block, reiser4_key_plug_t *kplug)
{
reiser4_node_t *entity;
aal_assert("edward-6", kplug != NULL);
aal_assert("edward-7", block != NULL);
if (!(entity = node41_prepare(block, kplug)))
return NULL;
/* Verify checksum */
if (csum_node41(entity, 1 /* check */) == 0) {
aal_free(entity);
return NULL;
}
/* Check the magic. */
if (nh_get_magic(entity) != NODE41_MAGIC) {
aal_free(entity);
return NULL;
}
return entity;
}
errno_t node41_sync(reiser4_node_t *entity) {
csum_node41(entity, 0 /* update */);
return node40_sync(entity);
}
#ifndef ENABLE_MINIMAL
/* Returns maximal size of item possible for passed node instance */
static uint16_t node41_maxspace(reiser4_node_t *entity) {
aal_assert("edward-8", entity != NULL);
/*
* Maximal space is node size minus node header and minus item
* header
*/
return (entity->block->size - sizeof(node41_header_t) -
ih_size(entity->keypol));
}
/*
* Initializes node of the given @level on the @block with key plugin
* @kplug. Returns initialized node instance
*/
static reiser4_node_t *node41_init(aal_block_t *block, uint8_t level,
reiser4_key_plug_t *kplug)
{
return node40_init_common(block, level, kplug,
&node41_plug,
NODE41_MAGIC,
sizeof(node41_header_t),
node41_prepare);
}
#endif
reiser4_node_plug_t node41_plug = {
.p = {
.id = {NODE_REISER41_ID, 0, NODE_PLUG_TYPE},
#ifndef ENABLE_MINIMAL
.label = "node41",
.desc = "Protected node layout plugin.",
#endif
},
.open = node41_open,
.fini = node40_fini,
.lookup = node40_lookup,
.fetch = node40_fetch,
.items = node40_items,
.get_key = node40_get_key,
.get_level = node40_get_level,
#ifndef ENABLE_MINIMAL
.init = node41_init,
.sync = node41_sync,
.merge = node40_merge,
.pack = node41_pack,
.unpack = node41_unpack,
.insert = node40_insert,
.write = node40_write,
.trunc = node40_trunc,
.remove = node40_remove,
.print = node41_print,
.shift = node40_shift,
.shrink = node40_shrink,
.expand = node40_expand,
.insert_raw = node40_insert_raw,
.copy = node40_copy,
.overhead = node40_overhead,
.maxspace = node41_maxspace,
.space = node40_space,
.set_key = node40_set_key,
.set_level = node40_set_level,
.get_mstamp = node40_get_mstamp,
.get_fstamp = node40_get_fstamp,
.set_mstamp = node40_set_mstamp,
.set_fstamp = node40_set_fstamp,
.set_flags = node40_set_flags,
.get_flags = node40_get_flags,
.set_state = node40_set_state,
.get_state = node40_get_state,
.check_struct = node41_check_struct
#endif
};
/*
Local variables:
c-indentation-style: "K&R"
mode-name: "LC"
c-basic-offset: 8
tab-width: 8
fill-column: 80
scroll-step: 1
End:
*/
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