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Allocate indices directly in ramcache header. Add version code to

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tagcache state dump header. Debug: hdr-structure corruption might
happen after rebuilding of dircache.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30109 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Miika Pekkarinen 2011-07-01 13:48:28 +00:00
parent 563a185ff4
commit 337e922685
2 changed files with 10 additions and 6 deletions
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13
apps/tagcache.c
View file

@ -206,15 +206,16 @@ static struct master_header current_tcmh;
#ifdef HAVE_TC_RAMCACHE
/* Header is created when loading database to ram. */
struct ramcache_header {
struct index_entry *indices; /* Master index file content */
char *tags[TAG_COUNT]; /* Tag file content (not including filename tag) */
int entry_count[TAG_COUNT]; /* Number of entries in the indices. */
struct index_entry indices[0]; /* Master index file content */
};
# ifdef HAVE_EEPROM_SETTINGS
struct statefile_header {
int32_t magic; /* Statefile version number */
struct master_header mh; /* Header from the master index */
struct ramcache_header *hdr;
struct ramcache_header *hdr; /* Old load address of hdr for relocation */
struct tagcache_stat tc_stat;
};
# endif
@ -3793,7 +3794,6 @@ static bool allocate_tagcache(void)
hdr = buffer_alloc(tc_stat.ramcache_allocated + 128);
memset(hdr, 0, sizeof(struct ramcache_header));
memcpy(&current_tcmh, &tcmh, sizeof current_tcmh);
hdr->indices = (struct index_entry *)(hdr + 1);
logf("tagcache: %d bytes allocated.", tc_stat.ramcache_allocated);
return true;
@ -3818,6 +3818,7 @@ static bool tagcache_dumpload(void)
hdr = buffer_alloc(0);
rc = read(fd, &shdr, sizeof(struct statefile_header));
if (rc != sizeof(struct statefile_header)
|| shdr.magic != TAGCACHE_STATEFILE_MAGIC
|| shdr.mh.tch.magic != TAGCACHE_MAGIC)
{
logf("incorrect statefile");
@ -3843,7 +3844,6 @@ static bool tagcache_dumpload(void)
memcpy(&tc_stat, &shdr.tc_stat, sizeof(struct tagcache_stat));
/* Now fix the pointers */
hdr->indices = (struct index_entry *)((long)hdr->indices + offpos);
for (i = 0; i < TAG_COUNT; i++)
hdr->tags[i] += offpos;
@ -3869,6 +3869,7 @@ static bool tagcache_dumpsave(void)
}
/* Create the header */
shdr.magic = TAGCACHE_STATEFILE_MAGIC;
shdr.hdr = hdr;
memcpy(&shdr.mh, &current_tcmh, sizeof current_tcmh);
memcpy(&shdr.tc_stat, &tc_stat, sizeof tc_stat);
@ -3924,6 +3925,8 @@ static bool load_tagcache(void)
/* Load the master index table. */
for (i = 0; i < tcmh.tch.entry_count; i++)
{
/* DEBUG: After tagcache commit and dircache rebuild, hdr-sturcture
* may become corrupt. */
rc = ecread_index_entry(fd, idx);
if (rc != sizeof(struct index_entry))
{
@ -3997,8 +4000,6 @@ static bool load_tagcache(void)
int dc;
# endif
// FIXME: This is wrong!
// idx = &hdr->indices[hdr->entry_count[i]];
idx = &hdr->indices[fe->idx_id];
if (fe->tag_length >= (long)sizeof(buf)-1)

3
apps/tagcache.h
View file

@ -52,6 +52,9 @@ enum tag_type { tag_artist = 0, tag_album, tag_genre, tag_title,
/* Tag Cache Header version 'TCHxx'. Increment when changing internal structures. */
#define TAGCACHE_MAGIC 0x5443480e
/* Dump store/restore header version 'TCSxx'. */
#define TAGCACHE_STATEFILE_MAGIC 0x54435301
/* How much to allocate extra space for ramcache. */
#define TAGCACHE_RESERVE 32768