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rockbox/apps/tagcache.c
Michael Sevakis 7d1a47cf13 Rewrite filesystem code (WIP) 
This patch redoes the filesystem code from the FAT driver up to the
clipboard code in onplay.c.

Not every aspect of this is finished therefore it is still "WIP". I
don't wish to do too much at once (haha!). What is left to do is get
dircache back in the sim and find an implementation for the dircache
indicies in the tagcache and playlist code or do something else that
has the same benefit. Leaving these out for now does not make anything
unusable. All the basics are done.

Phone app code should probably get vetted (and app path handling
just plain rewritten as environment expansions); the SDL app and
Android run well.

Main things addressed:
1) Thread safety: There is none right now in the trunk code. Most of
what currently works is luck when multiple threads are involved or
multiple descriptors to the same file are open.

2) POSIX compliance: Many of the functions behave nothing like their
counterparts on a host system. This leads to inconsistent code or very
different behavior from native to hosted. One huge offender was
rename(). Going point by point would fill a book.

3) Actual running RAM usage: Many targets will use less RAM and less
stack space (some more RAM because I upped the number of cache buffers
for large memory). There's very little memory lying fallow in rarely-used
areas (see 'Key core changes' below). Also, all targets may open the same
number of directory streams whereas before those with less than 8MB RAM
were limited to 8, not 12 implying those targets will save slightly
less.

4) Performance: The test_disk plugin shows markedly improved performance,
particularly in the area of (uncached) directory scanning, due partly to
more optimal directory reading and to a better sector cache algorithm.
Uncached times tend to be better while there is a bit of a slowdown in
dircache due to it being a bit heavier of an implementation. It's not
noticeable by a human as far as I can say.

Key core changes:
1) Files and directories share core code and data structures.

2) The filesystem code knows which descriptors refer to same file.
This ensures that changes from one stream are appropriately reflected
in every open descriptor for that file (fileobj_mgr.c).

3) File and directory cache buffers are borrowed from the main sector
cache. This means that when they are not in use by a file, they are not
wasted, but used for the cache. Most of the time, only a few of them
are needed. It also means that adding more file and directory handles
is less expensive. All one must do in ensure a large enough cache to
borrow from.

4) Relative path components are supported and the namespace is unified.
It does not support full relative paths to an implied current directory;
what is does support is use of "." and "..". Adding the former would
not be very difficult. The namespace is unified in the sense that
volumes may be specified several times along with relative parts, e.g.:
"/<0>/foo/../../<1>/bar" :<=> "/<1>/bar".

5) Stack usage is down due to sharing of data, static allocation and
less duplication of strings on the stack. This requires more
serialization than I would like but since the number of threads is
limited to a low number, the tradoff in favor of the stack seems
reasonable.

6) Separates and heirarchicalizes (sic) the SIM and APP filesystem
code. SIM path and volume handling is just like the target. Some
aspects of the APP file code get more straightforward (e.g. no path
hashing is needed).

Dircache:
Deserves its own section. Dircache is new but pays homage to the old.
The old one was not compatible and so it, since it got redone, does
all the stuff it always should have done such as:

1) It may be update and used at any time during the build process.
No longer has one to wait for it to finish building to do basic file
management (create, remove, rename, etc.).

2) It does not need to be either fully scanned or completely disabled;
it can be incomplete (i.e. overfilled, missing paths), still be
of benefit and be correct.

3) Handles mounting and dismounting of individual volumes which means
a full rebuild is not needed just because you pop a new SD card in the
slot. Now, because it reuses its freed entry data, may rebuild only
that volume.

4) Much more fundamental to the file code. When it is built, it is
the keeper of the master file list whether enabled or not ("disabled"
is just a state of the cache). Its must always to ready to be started
and bind all streams opened prior to being enabled.

5) Maintains any short filenames in OEM format which means that it does
not need to be rebuilt when changing the default codepage.

Miscellaneous Compatibility:
1) Update any other code that would otherwise not work such as the
hotswap mounting code in various card drivers.

2) File management: Clipboard needed updating because of the behavioral
changes. Still needs a little more work on some finer points.

3) Remove now-obsolete functionality such as the mutex's "no preempt"
flag (which was only for the prior FAT driver).

4) struct dirinfo uses time_t rather than raw FAT directory entry
time fields. I plan to follow up on genericizing everything there
(i.e. no FAT attributes).

5) unicode.c needed some redoing so that the file code does not try
try to load codepages during a scan, which is actually a problem with
the current code. The default codepage, if any is required, is now
kept in RAM separarately (bufalloced) from codepages specified to
iso_decode() (which must not be bufalloced because the conversion
may be done by playback threads).

Brings with it some additional reusable core code:
1) Revised file functions: Reusable code that does things such as
safe path concatenation and parsing without buffer limitations or
data duplication. Variants that copy or alter the input path may be
based off these.

To do:
1) Put dircache functionality back in the sim. Treating it internally
as a different kind of file system seems the best approach at this
time.

2) Restore use of dircache indexes in the playlist and database or
something effectively the same. Since the cache doesn't have to be
complete in order to be used, not getting a hit on the cache doesn't
unambiguously say if the path exists or not.

Change-Id: Ia30f3082a136253e3a0eae0784e3091d138915c8
Reviewed-on: http://gerrit.rockbox.org/566
Reviewed-by: Michael Sevakis <jethead71@rockbox.org>
Tested: Michael Sevakis <jethead71@rockbox.org>
2014-08-30 03:48:23 +02:00

4902 lines
132 KiB
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 by Miika Pekkarinen
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
/*
* TagCache API
*
* ----------x---------x------------------x-----
* | | | External
* +---------------x-------+ | TagCache | Libraries
* | Modification routines | | Core |
* +-x---------x-----------+ | |
* | (R/W) | | | |
* | +------x-------------x-+ +-------------x-----+ |
* | | x==x Filters & clauses | |
* | | Search routines | +-------------------+ |
* | | x============================x DirCache
* | +-x--------------------+ | (optional)
* | | (R) |
* | | +-------------------------------+ +---------+ |
* | | | DB Commit (sort,unique,index) | | | |
* | | +-x--------------------------x--+ | Control | |
* | | | (R/W) | (R) | Thread | |
* | | | +----------------------+ | | | |
* | | | | TagCache DB Builder | | +---------+ |
* | | | +-x-------------x------+ | |
* | | | | (R) | (W) | |
* | | | | +--x--------x---------+ |
* | | | | | Temporary Commit DB | |
* | | | | +---------------------+ |
* +-x----x-------x--+ |
* | TagCache RAM DB x==\(W) +-----------------+ |
* +-----------------+ \===x | |
* | | | | (R) | Ram DB Loader x============x DirCache
* +-x----x---x---x---+ /==x | | (optional)
* | Tagcache Disk DB x==/ +-----------------+ |
* +------------------+ |
*
*/
/*#define LOGF_ENABLE*/
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#ifdef APPLICATION
#include <unistd.h> /* readlink() */
#include <limits.h> /* PATH_MAX */
#endif
#include "config.h"
#include "ata_idle_notify.h"
#include "thread.h"
#include "kernel.h"
#include "system.h"
#include "logf.h"
#include "string-extra.h"
#include "usb.h"
#include "metadata.h"
#include "tagcache.h"
#include "core_alloc.h"
#include "crc32.h"
#include "misc.h"
#include "settings.h"
#include "dir.h"
#include "pathfuncs.h"
#include "structec.h"
#include "debug.h"
#ifndef __PCTOOL__
#include "lang.h"
#include "eeprom_settings.h"
#endif
#undef HAVE_DIRCACHE
#ifdef __PCTOOL__
#define yield() do { } while(0)
#define sim_sleep(timeout) do { } while(0)
#define do_timed_yield() do { } while(0)
#endif
#ifndef __PCTOOL__
/* Tag Cache thread. */
static struct event_queue tagcache_queue SHAREDBSS_ATTR;
static long tagcache_stack[(DEFAULT_STACK_SIZE + 0x4000)/sizeof(long)];
static const char tagcache_thread_name[] = "tagcache";
#endif
/* Previous path when scanning directory tree recursively. */
static char curpath[TAG_MAXLEN+32];
/* Used when removing duplicates. */
static char *tempbuf; /* Allocated when needed. */
static long tempbufidx; /* Current location in buffer. */
static size_t tempbuf_size; /* Buffer size (TEMPBUF_SIZE). */
static long tempbuf_left; /* Buffer space left. */
static long tempbuf_pos;
#define SORTED_TAGS_COUNT 8
#define TAGCACHE_IS_UNIQUE(tag) (BIT_N(tag) & TAGCACHE_UNIQUE_TAGS)
#define TAGCACHE_IS_SORTED(tag) (BIT_N(tag) & TAGCACHE_SORTED_TAGS)
#define TAGCACHE_IS_NUMERIC_OR_NONUNIQUE(tag) \
(BIT_N(tag) & (TAGCACHE_NUMERIC_TAGS | ~TAGCACHE_UNIQUE_TAGS))
/* Tags we want to get sorted (loaded to the tempbuf). */
#define TAGCACHE_SORTED_TAGS ((1LU << tag_artist) | (1LU << tag_album) | \
(1LU << tag_genre) | (1LU << tag_composer) | (1LU << tag_comment) | \
(1LU << tag_albumartist) | (1LU << tag_grouping) | (1LU << tag_title))
/* Uniqued tags (we can use these tags with filters and conditional clauses). */
#define TAGCACHE_UNIQUE_TAGS ((1LU << tag_artist) | (1LU << tag_album) | \
(1LU << tag_genre) | (1LU << tag_composer) | (1LU << tag_comment) | \
(1LU << tag_albumartist) | (1LU << tag_grouping))
/* String presentation of the tags defined in tagcache.h. Must be in correct order! */
static const char *tags_str[] = { "artist", "album", "genre", "title",
"filename", "composer", "comment", "albumartist", "grouping", "year",
"discnumber", "tracknumber", "bitrate", "length", "playcount", "rating",
"playtime", "lastplayed", "commitid", "mtime", "lastelapsed", "lastoffset" };
/* Status information of the tagcache. */
static struct tagcache_stat tc_stat;
/* Queue commands. */
enum tagcache_queue {
Q_STOP_SCAN = 0,
Q_START_SCAN,
Q_IMPORT_CHANGELOG,
Q_UPDATE,
Q_REBUILD,
/* Internal tagcache command queue. */
CMD_UPDATE_MASTER_HEADER,
CMD_UPDATE_NUMERIC,
};
struct tagcache_command_entry {
int32_t command;
int32_t idx_id;
int32_t tag;
int32_t data;
};
#ifndef __PCTOOL__
static struct tagcache_command_entry command_queue[TAGCACHE_COMMAND_QUEUE_LENGTH];
static volatile int command_queue_widx = 0;
static volatile int command_queue_ridx = 0;
static struct mutex command_queue_mutex SHAREDBSS_ATTR;
#endif
/* Tag database structures. */
/* Variable-length tag entry in tag files. */
struct tagfile_entry {
int32_t tag_length; /* Length of the data in bytes including '\0' */
int32_t idx_id; /* Corresponding entry location in index file of not unique tags */
char tag_data[0]; /* Begin of the tag data */
};
/* Fixed-size tag entry in master db index. */
struct index_entry {
int32_t tag_seek[TAG_COUNT]; /* Location of tag data or numeric tag data */
int32_t flag; /* Status flags */
};
/* Header is the same in every file. */
struct tagcache_header {
int32_t magic; /* Header version number */
int32_t datasize; /* Data size in bytes */
int32_t entry_count; /* Number of entries in this file */
};
struct master_header {
struct tagcache_header tch;
int32_t serial; /* Increasing counting number */
int32_t commitid; /* Number of commits so far */
int32_t dirty;
};
/* For the endianess correction */
static const char * const tagfile_entry_ec = "ll";
/**
Note: This should be (1 + TAG_COUNT) amount of l's.
*/
static const char * const index_entry_ec = "lllllllllllllllllllllll";
static const char * const tagcache_header_ec = "lll";
static const char * const master_header_ec = "llllll";
static struct master_header current_tcmh;
#ifdef HAVE_TC_RAMCACHE
/* Header is created when loading database to ram. */
struct ramcache_header {
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; /* Old load address of hdr for relocation */
struct tagcache_stat tc_stat;
};
# endif
/* Pointer to allocated ramcache_header */
static struct ramcache_header *ramcache_hdr;
/* lock entity to temporarily prevent ramcache_hdr from moving */
static int move_lock;
#endif
/**
* Full tag entries stored in a temporary file waiting
* for commit to the cache. */
struct temp_file_entry {
long tag_offset[TAG_COUNT];
short tag_length[TAG_COUNT];
long flag;
long data_length;
};
struct tempbuf_id_list {
long id;
struct tempbuf_id_list *next;
};
struct tempbuf_searchidx {
long idx_id;
char *str;
int seek;
struct tempbuf_id_list idlist;
};
/* Lookup buffer for fixing messed up index while after sorting. */
static long commit_entry_count;
static long lookup_buffer_depth;
static struct tempbuf_searchidx **lookup;
/* Used when building the temporary file. */
static int cachefd = -1, filenametag_fd;
static int total_entry_count = 0;
static int data_size = 0;
static int processed_dir_count;
/* Thread safe locking */
static volatile int write_lock;
static volatile int read_lock;
static bool delete_entry(long idx_id);
const char* tagcache_tag_to_str(int tag)
{
return tags_str[tag];
}
/* Helper functions for the two most read/write data structure: tagfile_entry and index_entry */
static ssize_t ecread_tagfile_entry(int fd, struct tagfile_entry *buf)
{
return ecread(fd, buf, 1, tagfile_entry_ec, tc_stat.econ);
}
static ssize_t ecread_index_entry(int fd, struct index_entry *buf)
{
return ecread(fd, buf, 1, index_entry_ec, tc_stat.econ);
}
static ssize_t ecwrite_index_entry(int fd, struct index_entry *buf)
{
return ecwrite(fd, buf, 1, index_entry_ec, tc_stat.econ);
}
#ifdef HAVE_DIRCACHE
/**
* Returns true if specified flag is still present, i.e., dircache
* has not been reloaded.
*/
static bool is_dircache_intact(void)
{
return dircache_get_appflag(DIRCACHE_APPFLAG_TAGCACHE);
}
#endif
static int open_tag_fd(struct tagcache_header *hdr, int tag, bool write)
{
int fd;
char buf[MAX_PATH];
int rc;
if (TAGCACHE_IS_NUMERIC(tag) || tag < 0 || tag >= TAG_COUNT)
return -1;
snprintf(buf, sizeof buf, TAGCACHE_FILE_INDEX, tag);
fd = open(buf, write ? O_RDWR : O_RDONLY);
if (fd < 0)
{
logf("tag file open failed: tag=%d write=%d file=%s", tag, write, buf);
tc_stat.ready = false;
return fd;
}
/* Check the header. */
rc = ecread(fd, hdr, 1, tagcache_header_ec, tc_stat.econ);
if (hdr->magic != TAGCACHE_MAGIC || rc != sizeof(struct tagcache_header))
{
logf("header error");
tc_stat.ready = false;
close(fd);
return -2;
}
return fd;
}
static int open_master_fd(struct master_header *hdr, bool write)
{
int fd;
int rc;
fd = open(TAGCACHE_FILE_MASTER, write ? O_RDWR : O_RDONLY);
if (fd < 0)
{
logf("master file open failed for R/W");
tc_stat.ready = false;
return fd;
}
tc_stat.econ = false;
/* Check the header. */
rc = read(fd, hdr, sizeof(struct master_header));
if (hdr->tch.magic == TAGCACHE_MAGIC && rc == sizeof(struct master_header))
{
/* Success. */
return fd;
}
/* Trying to read again, this time with endianess correction enabled. */
lseek(fd, 0, SEEK_SET);
rc = ecread(fd, hdr, 1, master_header_ec, true);
if (hdr->tch.magic != TAGCACHE_MAGIC || rc != sizeof(struct master_header))
{
logf("header error");
tc_stat.ready = false;
close(fd);
return -2;
}
tc_stat.econ = true;
return fd;
}
#ifndef __PCTOOL__
static bool do_timed_yield(void)
{
/* Sorting can lock up for quite a while, so yield occasionally */
static long wakeup_tick = 0;
if (TIME_AFTER(current_tick, wakeup_tick))
{
wakeup_tick = current_tick + (HZ/4);
yield();
return true;
}
return false;
}
#endif
#if defined(HAVE_TC_RAMCACHE) && defined(HAVE_DIRCACHE)
/* find the ramcache entry corresponding to the file indicated by
* filename and dc (it's corresponding dircache id). */
static long find_entry_ram(const char *filename, int dc)
{
static long last_pos = 0;
int i;
/* Check if tagcache is loaded into ram. */
if (!tc_stat.ramcache || !is_dircache_intact())
return -1;
if (dc < 0)
dc = dircache_get_entry_id(filename);
if (dc < 0)
{
logf("tagcache: file not found.");
return -1;
}
try_again:
if (last_pos > 0)
i = last_pos;
else
i = 0;
for (; i < current_tcmh.tch.entry_count; i++)
{
if (ramcache_hdr->indices[i].tag_seek[tag_filename] == dc)
{
last_pos = MAX(0, i - 3);
return i;
}
do_timed_yield();
}
if (last_pos > 0)
{
last_pos = 0;
goto try_again;
}
return -1;
}
#endif
static long find_entry_disk(const char *filename_raw, bool localfd)
{
struct tagcache_header tch;
static long last_pos = -1;
long pos_history[POS_HISTORY_COUNT];
long pos_history_idx = 0;
bool found = false;
struct tagfile_entry tfe;
int fd;
char buf[TAG_MAXLEN+32];
int i;
int pos = -1;
const char *filename = filename_raw;
#ifdef APPLICATION
char pathbuf[PATH_MAX]; /* Note: Don't use MAX_PATH here, it's too small */
if (realpath(filename, pathbuf) == pathbuf)
filename = pathbuf;
#endif
if (!tc_stat.ready)
return -2;
fd = filenametag_fd;
if (fd < 0 || localfd)
{
last_pos = -1;
if ( (fd = open_tag_fd(&tch, tag_filename, false)) < 0)
return -1;
}
check_again:
if (last_pos > 0)
lseek(fd, last_pos, SEEK_SET);
else
lseek(fd, sizeof(struct tagcache_header), SEEK_SET);
while (true)
{
pos = lseek(fd, 0, SEEK_CUR);
for (i = pos_history_idx-1; i >= 0; i--)
pos_history[i+1] = pos_history[i];
pos_history[0] = pos;
if (ecread_tagfile_entry(fd, &tfe)
!= sizeof(struct tagfile_entry))
{
break ;
}
if (tfe.tag_length >= (long)sizeof(buf))
{
logf("too long tag #1");
close(fd);
if (!localfd)
filenametag_fd = -1;
last_pos = -1;
return -2;
}
if (read(fd, buf, tfe.tag_length) != tfe.tag_length)
{
logf("read error #2");
close(fd);
if (!localfd)
filenametag_fd = -1;
last_pos = -1;
return -3;
}
if (!strcmp(filename, buf))
{
last_pos = pos_history[pos_history_idx];
found = true;
break ;
}
if (pos_history_idx < POS_HISTORY_COUNT - 1)
pos_history_idx++;
}
/* Not found? */
if (!found)
{
if (last_pos > 0)
{
last_pos = -1;
logf("seek again");
goto check_again;
}
if (fd != filenametag_fd || localfd)
close(fd);
return -4;
}
if (fd != filenametag_fd || localfd)
close(fd);
return tfe.idx_id;
}
static int find_index(const char *filename)
{
long idx_id = -1;
#if defined(HAVE_TC_RAMCACHE) && defined(HAVE_DIRCACHE)
idx_id = find_entry_ram(filename, -1);
#endif
if (idx_id < 0)
idx_id = find_entry_disk(filename, true);
return idx_id;
}
bool tagcache_find_index(struct tagcache_search *tcs, const char *filename)
{
int idx_id;
if (!tc_stat.ready)
return false;
idx_id = find_index(filename);
if (idx_id < 0)
return false;
if (!tagcache_search(tcs, tag_filename))
return false;
tcs->entry_count = 0;
tcs->idx_id = idx_id;
return true;
}
static bool get_index(int masterfd, int idxid,
struct index_entry *idx, bool use_ram)
{
bool localfd = false;
if (idxid < 0)
{
logf("Incorrect idxid: %d", idxid);
return false;
}
#ifdef HAVE_TC_RAMCACHE
if (tc_stat.ramcache && use_ram)
{
if (ramcache_hdr->indices[idxid].flag & FLAG_DELETED)
return false;
# ifdef HAVE_DIRCACHE
if (!(ramcache_hdr->indices[idxid].flag & FLAG_DIRCACHE)
|| is_dircache_intact())
#endif
{
memcpy(idx, &ramcache_hdr->indices[idxid], sizeof(struct index_entry));
return true;
}
}
#else
(void)use_ram;
#endif
if (masterfd < 0)
{
struct master_header tcmh;
localfd = true;
masterfd = open_master_fd(&tcmh, false);
if (masterfd < 0)
return false;
}
lseek(masterfd, idxid * sizeof(struct index_entry)
+ sizeof(struct master_header), SEEK_SET);
if (ecread_index_entry(masterfd, idx)
!= sizeof(struct index_entry))
{
logf("read error #3");
if (localfd)
close(masterfd);
return false;
}
if (localfd)
close(masterfd);
if (idx->flag & FLAG_DELETED)
return false;
return true;
}
#ifndef __PCTOOL__
static bool write_index(int masterfd, int idxid, struct index_entry *idx)
{
/* We need to exclude all memory only flags & tags when writing to disk. */
if (idx->flag & FLAG_DIRCACHE)
{
logf("memory only flags!");
return false;
}
#ifdef HAVE_TC_RAMCACHE
/* Only update numeric data. Writing the whole index to RAM by memcpy
* destroys dircache pointers!
*/
if (tc_stat.ramcache)
{
int tag;
struct index_entry *idx_ram = &ramcache_hdr->indices[idxid];
for (tag = 0; tag < TAG_COUNT; tag++)
{
if (TAGCACHE_IS_NUMERIC(tag))
{
idx_ram->tag_seek[tag] = idx->tag_seek[tag];
}
}
/* Don't touch the dircache flag or attributes. */
idx_ram->flag = (idx->flag & 0x0000ffff)
| (idx_ram->flag & (0xffff0000 | FLAG_DIRCACHE));
}
#endif
lseek(masterfd, idxid * sizeof(struct index_entry)
+ sizeof(struct master_header), SEEK_SET);
if (ecwrite_index_entry(masterfd, idx) != sizeof(struct index_entry))
{
logf("write error #3");
logf("idxid: %d", idxid);
return false;
}
return true;
}
#endif /* !__PCTOOL__ */
static bool open_files(struct tagcache_search *tcs, int tag)
{
if (tcs->idxfd[tag] < 0)
{
char fn[MAX_PATH];
snprintf(fn, sizeof fn, TAGCACHE_FILE_INDEX, tag);
tcs->idxfd[tag] = open(fn, O_RDONLY);
}
if (tcs->idxfd[tag] < 0)
{
logf("File not open!");
return false;
}
return true;
}
static bool retrieve(struct tagcache_search *tcs, struct index_entry *idx,
int tag, char *buf, long size)
{
struct tagfile_entry tfe;
long seek;
*buf = '\0';
if (TAGCACHE_IS_NUMERIC(tag))
return false;
seek = idx->tag_seek[tag];
if (seek < 0)
{
logf("Retrieve failed");
return false;
}
#ifdef HAVE_TC_RAMCACHE
if (tcs->ramsearch)
{
struct tagfile_entry *ep;
# ifdef HAVE_DIRCACHE
if (tag == tag_filename && (idx->flag & FLAG_DIRCACHE))
{
/* for tag_filename, seek is a dircache index */
if (is_dircache_intact())
{
dircache_copy_path(seek, buf, size);
return true;
}
else
{
/* The seek is useless now, there's nothing we can return. */
logf("retrieve: dircache gone, cannot read file name");
tagcache_unload_ramcache();
// XXX do this when there's a way to not trigger an
// update before reloading:
// tagcache_start_scan();
return false;
}
}
else
# endif
if (tag != tag_filename)
{
ep = (struct tagfile_entry *)&ramcache_hdr->tags[tag][seek];
strlcpy(buf, ep->tag_data, size);
return true;
}
}
#endif
if (!open_files(tcs, tag))
return false;
lseek(tcs->idxfd[tag], seek, SEEK_SET);
if (ecread_tagfile_entry(tcs->idxfd[tag], &tfe)
!= sizeof(struct tagfile_entry))
{
logf("read error #5");
return false;
}
if (tfe.tag_length >= size)
{
logf("too small buffer");
return false;
}
if (read(tcs->idxfd[tag], buf, tfe.tag_length) !=
tfe.tag_length)
{
logf("read error #6");
return false;
}
buf[tfe.tag_length] = '\0';
return true;
}
#define COMMAND_QUEUE_IS_EMPTY (command_queue_ridx == command_queue_widx)
static long find_tag(int tag, int idx_id, const struct index_entry *idx)
{
#ifndef __PCTOOL__
if (! COMMAND_QUEUE_IS_EMPTY && TAGCACHE_IS_NUMERIC(tag))
{
/* Attempt to find tag data through store-to-load forwarding in
command queue */
long result = -1;
mutex_lock(&command_queue_mutex);
int ridx = command_queue_widx;
while (ridx != command_queue_ridx)
{
if (--ridx < 0)
ridx = TAGCACHE_COMMAND_QUEUE_LENGTH - 1;
if (command_queue[ridx].command == CMD_UPDATE_NUMERIC
&& command_queue[ridx].idx_id == idx_id
&& command_queue[ridx].tag == tag)
{
result = command_queue[ridx].data;
break;
}
}
mutex_unlock(&command_queue_mutex);
if (result >= 0)
{
logf("find_tag: "
"Recovered tag %d value %lX from write queue",
tag, result);
return result;
}
}
#else
(void)idx_id;
#endif
return idx->tag_seek[tag];
}
static long check_virtual_tags(int tag, int idx_id,
const struct index_entry *idx)
{
long data = 0;
switch (tag)
{
case tag_virt_length_sec:
data = (find_tag(tag_length, idx_id, idx)/1000) % 60;
break;
case tag_virt_length_min:
data = (find_tag(tag_length, idx_id, idx)/1000) / 60;
break;
case tag_virt_playtime_sec:
data = (find_tag(tag_playtime, idx_id, idx)/1000) % 60;
break;
case tag_virt_playtime_min:
data = (find_tag(tag_playtime, idx_id, idx)/1000) / 60;
break;
case tag_virt_autoscore:
if (find_tag(tag_length, idx_id, idx) == 0
|| find_tag(tag_playcount, idx_id, idx) == 0)
{
data = 0;
}
else
{
/* A straight calculus gives:
autoscore = 100 * playtime / length / playcout (1)
Now, consider the euclidian division of playtime by length:
playtime = alpha * length + beta
With:
0 <= beta < length
Now, (1) becomes:
autoscore = 100 * (alpha / playcout + beta / length / playcount)
Both terms should be small enough to avoid any overflow
*/
data = 100 * (find_tag(tag_playtime, idx_id, idx)
/ find_tag(tag_length, idx_id, idx))
+ (100 * (find_tag(tag_playtime, idx_id, idx)
% find_tag(tag_length, idx_id, idx)))
/ find_tag(tag_length, idx_id, idx);
data /= find_tag(tag_playcount, idx_id, idx);
}
break;
/* How many commits before the file has been added to the DB. */
case tag_virt_entryage:
data = current_tcmh.commitid
- find_tag(tag_commitid, idx_id, idx) - 1;
break;
case tag_virt_basename:
tag = tag_filename; /* return filename; caller handles basename */
/* FALLTHRU */
default:
data = find_tag(tag, idx_id, idx);
}
return data;
}
long tagcache_get_numeric(const struct tagcache_search *tcs, int tag)
{
struct index_entry idx;
if (!tc_stat.ready)
return false;
if (!TAGCACHE_IS_NUMERIC(tag))
return -1;
if (!get_index(tcs->masterfd, tcs->idx_id, &idx, true))
return -2;
return check_virtual_tags(tag, tcs->idx_id, &idx);
}
inline static bool str_ends_with(const char *str1, const char *str2)
{
int str_len = strlen(str1);
int clause_len = strlen(str2);
if (clause_len > str_len)
return false;
return !strcasecmp(&str1[str_len - clause_len], str2);
}
inline static bool str_oneof(const char *str, const char *list)
{
const char *sep;
int l, len = strlen(str);
while (*list)
{
sep = strchr(list, '|');
l = sep ? (long)sep - (long)list : (int)strlen(list);
if ((l==len) && !strncasecmp(str, list, len))
return true;
list += sep ? l + 1 : l;
}
return false;
}
static bool check_against_clause(long numeric, const char *str,
const struct tagcache_search_clause *clause)
{
if (clause->numeric)
{
switch (clause->type)
{
case clause_is:
return numeric == clause->numeric_data;
case clause_is_not:
return numeric != clause->numeric_data;
case clause_gt:
return numeric > clause->numeric_data;
case clause_gteq:
return numeric >= clause->numeric_data;
case clause_lt:
return numeric < clause->numeric_data;
case clause_lteq:
return numeric <= clause->numeric_data;
default:
logf("Incorrect numeric tag: %d", clause->type);
}
}
else
{
switch (clause->type)
{
case clause_is:
return !strcasecmp(clause->str, str);
case clause_is_not:
return strcasecmp(clause->str, str);
case clause_gt:
return 0>strcasecmp(clause->str, str);
case clause_gteq:
return 0>=strcasecmp(clause->str, str);
case clause_lt:
return 0<strcasecmp(clause->str, str);
case clause_lteq:
return 0<=strcasecmp(clause->str, str);
case clause_contains:
return (strcasestr(str, clause->str) != NULL);
case clause_not_contains:
return (strcasestr(str, clause->str) == NULL);
case clause_begins_with:
return (strcasestr(str, clause->str) == str);
case clause_not_begins_with:
return (strcasestr(str, clause->str) != str);
case clause_ends_with:
return str_ends_with(str, clause->str);
case clause_not_ends_with:
return !str_ends_with(str, clause->str);
case clause_oneof:
return str_oneof(str, clause->str);
default:
logf("Incorrect tag: %d", clause->type);
}
}
return false;
}
static bool check_clauses(struct tagcache_search *tcs,
struct index_entry *idx,
struct tagcache_search_clause **clauses, int count)
{
int i;
/* Go through all conditional clauses. */
for (i = 0; i < count; i++)
{
int seek;
char buf[256];
char *str = buf;
struct tagcache_search_clause *clause = clauses[i];
if (clause->type == clause_logical_or)
break; /* all conditions before logical-or satisfied --
stop processing clauses */
seek = check_virtual_tags(clause->tag, tcs->idx_id, idx);
#ifdef HAVE_TC_RAMCACHE
if (tcs->ramsearch)
{
struct tagfile_entry *tfe;
if (!TAGCACHE_IS_NUMERIC(clause->tag))
{
if (clause->tag == tag_filename
|| clause->tag == tag_virt_basename)
{
retrieve(tcs, idx, tag_filename, buf, sizeof buf);
}
else
{
tfe = (struct tagfile_entry *)
&ramcache_hdr->tags[clause->tag][seek];
/* str points to movable data, but no locking required here,
* as no yield() is following */
str = tfe->tag_data;
}
}
}
else
#endif
{
struct tagfile_entry tfe;
if (!TAGCACHE_IS_NUMERIC(clause->tag))
{
int tag = clause->tag;
if (tag == tag_virt_basename)
tag = tag_filename;
int fd = tcs->idxfd[tag];
lseek(fd, seek, SEEK_SET);
ecread_tagfile_entry(fd, &tfe);
if (tfe.tag_length >= (int)sizeof(buf))
{
logf("Too long tag read!");
return false;
}
read(fd, str, tfe.tag_length);
str[tfe.tag_length] = '\0';
/* Check if entry has been deleted. */
if (str[0] == '\0')
return false;
}
}
if (clause->tag == tag_virt_basename)
{
char *basename = strrchr(str, '/');
if (basename)
str = basename + 1;
}
if (!check_against_clause(seek, str, clause))
{
/* Clause failed -- try finding a logical-or clause */
while (++i < count)
{
if (clauses[i]->type == clause_logical_or)
break;
}
if (i < count) /* Found logical-or? */
continue; /* Check clauses after logical-or */
return false;
}
}
return true;
}
bool tagcache_check_clauses(struct tagcache_search *tcs,
struct tagcache_search_clause **clause, int count)
{
struct index_entry idx;
if (count == 0)
return true;
if (!get_index(tcs->masterfd, tcs->idx_id, &idx, true))
return false;
return check_clauses(tcs, &idx, clause, count);
}
static bool add_uniqbuf(struct tagcache_search *tcs, unsigned long id)
{
int i;
/* If uniq buffer is not defined we must return true for search to work. */
if (tcs->unique_list == NULL || (!TAGCACHE_IS_UNIQUE(tcs->type)
&& !TAGCACHE_IS_NUMERIC(tcs->type)))
{
return true;
}
for (i = 0; i < tcs->unique_list_count; i++)
{
/* Return false if entry is found. */
if (tcs->unique_list[i] == id)
return false;
}
if (tcs->unique_list_count < tcs->unique_list_capacity)
{
tcs->unique_list[i] = id;
tcs->unique_list_count++;
}
return true;
}
static bool build_lookup_list(struct tagcache_search *tcs)
{
struct index_entry entry;
int i, j;
tcs->seek_list_count = 0;
#ifdef HAVE_TC_RAMCACHE
if (tcs->ramsearch
# ifdef HAVE_DIRCACHE
&& (tcs->type != tag_filename || is_dircache_intact())
# endif
)
{
move_lock++; /* lock because below makes a pointer to movable data */
for (i = tcs->seek_pos; i < current_tcmh.tch.entry_count; i++)
{
struct tagcache_seeklist_entry *seeklist;
/* idx points to movable data, don't yield or reload */
struct index_entry *idx = &ramcache_hdr->indices[i];
if (tcs->seek_list_count == SEEK_LIST_SIZE)
break ;
/* Skip deleted files. */
if (idx->flag & FLAG_DELETED)
continue;
/* Go through all filters.. */
for (j = 0; j < tcs->filter_count; j++)
{
if (idx->tag_seek[tcs->filter_tag[j]] != tcs->filter_seek[j])
{
break ;
}
}
if (j < tcs->filter_count)
continue ;
/* Check for conditions. */
if (!check_clauses(tcs, idx, tcs->clause, tcs->clause_count))
continue;
/* Add to the seek list if not already in uniq buffer (doesn't yield)*/
if (!add_uniqbuf(tcs, idx->tag_seek[tcs->type]))
continue;
/* Lets add it. */
seeklist = &tcs->seeklist[tcs->seek_list_count];
seeklist->seek = idx->tag_seek[tcs->type];
seeklist->flag = idx->flag;
seeklist->idx_id = i;
tcs->seek_list_count++;
}
move_lock--;
tcs->seek_pos = i;
return tcs->seek_list_count > 0;
}
#endif
if (tcs->masterfd < 0)
{
struct master_header tcmh;
tcs->masterfd = open_master_fd(&tcmh, false);
}
lseek(tcs->masterfd, tcs->seek_pos * sizeof(struct index_entry) +
sizeof(struct master_header), SEEK_SET);
while (ecread_index_entry(tcs->masterfd, &entry)
== sizeof(struct index_entry))
{
struct tagcache_seeklist_entry *seeklist;
if (tcs->seek_list_count == SEEK_LIST_SIZE)
break ;
i = tcs->seek_pos;
tcs->seek_pos++;
/* Check if entry has been deleted. */
if (entry.flag & FLAG_DELETED)
continue;
/* Go through all filters.. */
for (j = 0; j < tcs->filter_count; j++)
{
if (entry.tag_seek[tcs->filter_tag[j]] != tcs->filter_seek[j])
break ;
}
if (j < tcs->filter_count)
continue ;
/* Check for conditions. */
if (!check_clauses(tcs, &entry, tcs->clause, tcs->clause_count))
continue;
/* Add to the seek list if not already in uniq buffer. */
if (!add_uniqbuf(tcs, entry.tag_seek[tcs->type]))
continue;
/* Lets add it. */
seeklist = &tcs->seeklist[tcs->seek_list_count];
seeklist->seek = entry.tag_seek[tcs->type];
seeklist->flag = entry.flag;
seeklist->idx_id = i;
tcs->seek_list_count++;
yield();
}
return tcs->seek_list_count > 0;
}
static void remove_files(void)
{
int i;
char buf[MAX_PATH];
tc_stat.ready = false;
tc_stat.ramcache = false;
tc_stat.econ = false;
remove(TAGCACHE_FILE_MASTER);
for (i = 0; i < TAG_COUNT; i++)
{
if (TAGCACHE_IS_NUMERIC(i))
continue;
snprintf(buf, sizeof buf, TAGCACHE_FILE_INDEX, i);
remove(buf);
}
}
static bool check_all_headers(void)
{
struct master_header myhdr;
struct tagcache_header tch;
int tag;
int fd;
if ( (fd = open_master_fd(&myhdr, false)) < 0)
return false;
close(fd);
if (myhdr.dirty)
{
logf("tagcache is dirty!");
return false;
}
memcpy(&current_tcmh, &myhdr, sizeof(struct master_header));
for (tag = 0; tag < TAG_COUNT; tag++)
{
if (TAGCACHE_IS_NUMERIC(tag))
continue;
if ( (fd = open_tag_fd(&tch, tag, false)) < 0)
return false;
close(fd);
}
return true;
}
bool tagcache_search(struct tagcache_search *tcs, int tag)
{
struct tagcache_header tag_hdr;
struct master_header master_hdr;
int i;
while (read_lock)
sleep(1);
memset(tcs, 0, sizeof(struct tagcache_search));
if (tc_stat.commit_step > 0 || !tc_stat.ready)
return false;
tcs->position = sizeof(struct tagcache_header);
tcs->type = tag;
tcs->seek_pos = 0;
tcs->list_position = 0;
tcs->seek_list_count = 0;
tcs->filter_count = 0;
tcs->masterfd = -1;
for (i = 0; i < TAG_COUNT; i++)
tcs->idxfd[i] = -1;
#ifndef HAVE_TC_RAMCACHE
tcs->ramsearch = false;
#else
tcs->ramsearch = tc_stat.ramcache;
if (tcs->ramsearch)
{
tcs->entry_count = ramcache_hdr->entry_count[tcs->type];
}
else
#endif
{
/* Always open as R/W so we can pass tcs to functions that modify data also
* without failing. */
tcs->masterfd = open_master_fd(&master_hdr, true);
if (tcs->masterfd < 0)
return false;
if (!TAGCACHE_IS_NUMERIC(tcs->type))
{
tcs->idxfd[tcs->type] = open_tag_fd(&tag_hdr, tcs->type, false);
if (tcs->idxfd[tcs->type] < 0)
return false;
tcs->entry_count = tag_hdr.entry_count;
}
else
{
tcs->entry_count = master_hdr.tch.entry_count;
}
}
tcs->valid = true;
tcs->initialized = true;
write_lock++;
return true;
}
void tagcache_search_set_uniqbuf(struct tagcache_search *tcs,
void *buffer, long length)
{
tcs->unique_list = (unsigned long *)buffer;
tcs->unique_list_capacity = length / sizeof(*tcs->unique_list);
tcs->unique_list_count = 0;
}
bool tagcache_search_add_filter(struct tagcache_search *tcs,
int tag, int seek)
{
if (tcs->filter_count == TAGCACHE_MAX_FILTERS)
return false;
if (TAGCACHE_IS_NUMERIC_OR_NONUNIQUE(tag))
return false;
tcs->filter_tag[tcs->filter_count] = tag;
tcs->filter_seek[tcs->filter_count] = seek;
tcs->filter_count++;
return true;
}
bool tagcache_search_add_clause(struct tagcache_search *tcs,
struct tagcache_search_clause *clause)
{
int i;
if (tcs->clause_count >= TAGCACHE_MAX_CLAUSES)
{
logf("Too many clauses");
return false;
}
if (clause->type != clause_logical_or)
{
/* Check if there is already a similar filter in present (filters are
* much faster than clauses).
*/
for (i = 0; i < tcs->filter_count; i++)
{
if (tcs->filter_tag[i] == clause->tag)
return true;
}
if (!TAGCACHE_IS_NUMERIC(clause->tag) && tcs->idxfd[clause->tag] < 0)
{
char buf[MAX_PATH];
snprintf(buf, sizeof buf, TAGCACHE_FILE_INDEX, clause->tag);
tcs->idxfd[clause->tag] = open(buf, O_RDONLY);
}
}
tcs->clause[tcs->clause_count] = clause;
tcs->clause_count++;
return true;
}
static bool get_next(struct tagcache_search *tcs)
{
static char buf[TAG_MAXLEN+32];
struct tagfile_entry entry;
#if defined(HAVE_TC_RAMCACHE) && defined(HAVE_DIRCACHE)
long flag = 0;
#endif
if (!tcs->valid || !tc_stat.ready)
return false;
if (tcs->idxfd[tcs->type] < 0 && !TAGCACHE_IS_NUMERIC(tcs->type)
#ifdef HAVE_TC_RAMCACHE
&& !tcs->ramsearch
#endif
)
return false;
/* Relative fetch. */
if (tcs->filter_count > 0 || tcs->clause_count > 0
|| TAGCACHE_IS_NUMERIC(tcs->type)
#if defined(HAVE_TC_RAMCACHE) && defined(HAVE_DIRCACHE)
/* We need to retrieve flag status for dircache. */
|| (tcs->ramsearch && tcs->type == tag_filename)
#endif
)
{
struct tagcache_seeklist_entry *seeklist;
/* Check for end of list. */
if (tcs->list_position == tcs->seek_list_count)
{
tcs->list_position = 0;
/* Try to fetch more. */
if (!build_lookup_list(tcs))
{
tcs->valid = false;
return false;
}
}
seeklist = &tcs->seeklist[tcs->list_position];
#if defined(HAVE_TC_RAMCACHE) && defined(HAVE_DIRCACHE)
flag = seeklist->flag;
#endif
tcs->position = seeklist->seek;
tcs->idx_id = seeklist->idx_id;
tcs->list_position++;
}
else
{
if (tcs->entry_count == 0)
{
tcs->valid = false;
return false;
}
tcs->entry_count--;
}
tcs->result_seek = tcs->position;
if (TAGCACHE_IS_NUMERIC(tcs->type))
{
snprintf(buf, sizeof(buf), "%ld", tcs->position);
tcs->result = buf;
tcs->result_len = strlen(buf) + 1;
return true;
}
/* Direct fetch. */
#ifdef HAVE_TC_RAMCACHE
if (tcs->ramsearch)
{
#if defined(HAVE_TC_RAMCACHE) && defined(HAVE_DIRCACHE)
if (tcs->type == tag_filename && (flag & FLAG_DIRCACHE))
{
if (is_dircache_intact())
{
size_t len = dircache_copy_path(tcs->position, buf, sizeof buf);
tcs->result_len = len + 1;
tcs->result = buf;
tcs->ramresult = false;
return true;
}
else
{
/* The seek is useless now, there's nothing we can return. */
logf("get_next: dircache gone, cannot read file name");
tagcache_unload_ramcache();
// XXX do this when there's a way to not trigger an
// update before reloading:
// tagcache_start_scan();
tcs->valid = false;
return false;
}
}
else
#endif
if (tcs->type != tag_filename)
{
struct tagfile_entry *ep;
ep = (struct tagfile_entry *)&ramcache_hdr->tags[tcs->type][tcs->position];
/* don't return ep->tag_data directly as it may move */
tcs->result_len = strlcpy(buf, ep->tag_data, sizeof(buf)) + 1;
tcs->result = buf;
tcs->idx_id = ep->idx_id;
tcs->ramresult = false; /* was true before we copied to buf too */
/* Increase position for the next run. This may get overwritten. */
tcs->position += sizeof(struct tagfile_entry) + ep->tag_length;
return true;
}
}
#endif
if (!open_files(tcs, tcs->type))
{
tcs->valid = false;
return false;
}
/* Seek stream to the correct position and continue to direct fetch. */
lseek(tcs->idxfd[tcs->type], tcs->position, SEEK_SET);
if (ecread_tagfile_entry(tcs->idxfd[tcs->type], &entry) != sizeof(struct tagfile_entry))
{
logf("read error #5");
tcs->valid = false;
return false;
}
if (entry.tag_length > (long)sizeof(buf))
{
tcs->valid = false;
logf("too long tag #2");
logf("P:%lX/%lX", tcs->position, entry.tag_length);
return false;
}
if (read(tcs->idxfd[tcs->type], buf, entry.tag_length) != entry.tag_length)
{
tcs->valid = false;
logf("read error #4");
return false;
}
/**
Update the position for the next read (this may be overridden
if filters or clauses are being used).
*/
tcs->position += sizeof(struct tagfile_entry) + entry.tag_length;
tcs->result = buf;
tcs->result_len = strlen(tcs->result) + 1;
tcs->idx_id = entry.idx_id;
tcs->ramresult = false;
return true;
}
bool tagcache_get_next(struct tagcache_search *tcs)
{
while (get_next(tcs))
{
if (tcs->result_len > 1)
return true;
}
return false;
}
bool tagcache_retrieve(struct tagcache_search *tcs, int idxid,
int tag, char *buf, long size)
{
struct index_entry idx;
*buf = '\0';
if (!get_index(tcs->masterfd, idxid, &idx, true))
return false;
return retrieve(tcs, &idx, tag, buf, size);
}
static bool update_master_header(void)
{
struct master_header myhdr;
int fd;
if (!tc_stat.ready)
return false;
if ( (fd = open_master_fd(&myhdr, true)) < 0)
return false;
myhdr.serial = current_tcmh.serial;
myhdr.commitid = current_tcmh.commitid;
myhdr.dirty = current_tcmh.dirty;
/* Write it back */
lseek(fd, 0, SEEK_SET);
ecwrite(fd, &myhdr, 1, master_header_ec, tc_stat.econ);
close(fd);
return true;
}
void tagcache_search_finish(struct tagcache_search *tcs)
{
int i;
if (!tcs->initialized)
return;
if (tcs->masterfd >= 0)
{
close(tcs->masterfd);
tcs->masterfd = -1;
}
for (i = 0; i < TAG_COUNT; i++)
{
if (tcs->idxfd[i] >= 0)
{
close(tcs->idxfd[i]);
tcs->idxfd[i] = -1;
}
}
tcs->ramsearch = false;
tcs->valid = false;
tcs->initialized = 0;
if (write_lock > 0)
write_lock--;
}
#if defined(HAVE_TC_RAMCACHE) && defined(HAVE_DIRCACHE)
static struct tagfile_entry *get_tag(const struct index_entry *entry, int tag)
{
return (struct tagfile_entry *)&ramcache_hdr->tags[tag][entry->tag_seek[tag]];
}
static long get_tag_numeric(const struct index_entry *entry, int tag, int idx_id)
{
return check_virtual_tags(tag, idx_id, entry);
}
static char* get_tag_string(const struct index_entry *entry, int tag)
{
char* s = get_tag(entry, tag)->tag_data;
return strcmp(s, UNTAGGED) ? s : NULL;
}
bool tagcache_fill_tags(struct mp3entry *id3, const char *filename)
{
struct index_entry *entry;
int idx_id;
if (!tc_stat.ready || !tc_stat.ramcache)
return false;
/* Find the corresponding entry in tagcache. */
idx_id = find_entry_ram(filename, -1);
if (idx_id < 0)
return false;
entry = &ramcache_hdr->indices[idx_id];
memset(id3, 0, sizeof(struct mp3entry));
char* buf = id3->id3v2buf;
ssize_t remaining = sizeof(id3->id3v2buf);
/* this macro sets id3 strings by copying to the id3v2buf */
#define SET(x, y) do \
{ \
if (remaining > 0) \
{ \
x = NULL; /* initialize with null if tag doesn't exist */ \
char* src = get_tag_string(entry, y); \
if (src) \
{ \
x = buf; \
size_t len = strlcpy(buf, src, remaining) +1; \
buf += len; remaining -= len; \
} \
} \
} while(0)
SET(id3->title, tag_title);
SET(id3->artist, tag_artist);
SET(id3->album, tag_album);
SET(id3->genre_string, tag_genre);
SET(id3->composer, tag_composer);
SET(id3->comment, tag_comment);
SET(id3->albumartist, tag_albumartist);
SET(id3->grouping, tag_grouping);
id3->length = get_tag_numeric(entry, tag_length, idx_id);
id3->playcount = get_tag_numeric(entry, tag_playcount, idx_id);
id3->rating = get_tag_numeric(entry, tag_rating, idx_id);
id3->lastplayed = get_tag_numeric(entry, tag_lastplayed, idx_id);
id3->score = get_tag_numeric(entry, tag_virt_autoscore, idx_id) / 10;
id3->year = get_tag_numeric(entry, tag_year, idx_id);
id3->discnum = get_tag_numeric(entry, tag_discnumber, idx_id);
id3->tracknum = get_tag_numeric(entry, tag_tracknumber, idx_id);
id3->bitrate = get_tag_numeric(entry, tag_bitrate, idx_id);
if (id3->bitrate == 0)
id3->bitrate = 1;
#if CONFIG_CODEC == SWCODEC
if (global_settings.autoresume_enable)
{
id3->elapsed = get_tag_numeric(entry, tag_lastelapsed, idx_id);
logf("tagcache_fill_tags: Set elapsed for %s to %lX\n",
id3->title, id3->elapsed);
id3->offset = get_tag_numeric(entry, tag_lastoffset, idx_id);
logf("tagcache_fill_tags: Set offset for %s to %lX\n",
id3->title, id3->offset);
}
#endif
return true;
}
#endif
static inline void write_item(const char *item)
{
int len = strlen(item) + 1;
data_size += len;
write(cachefd, item, len);
}
static int check_if_empty(char **tag)
{
int length;
if (*tag == NULL || **tag == '\0')
{
*tag = UNTAGGED;
return sizeof(UNTAGGED); /* Tag length */
}
length = strlen(*tag);
if (length > TAG_MAXLEN)
{
logf("over length tag: %s", *tag);
length = TAG_MAXLEN;
(*tag)[length] = '\0';
}
return length + 1;
}
#define ADD_TAG(entry,tag,data) \
/* Adding tag */ \
entry.tag_offset[tag] = offset; \
entry.tag_length[tag] = check_if_empty(data); \
offset += entry.tag_length[tag]
/* GCC 3.4.6 for Coldfire can choose to inline this function. Not a good
* idea, as it uses lots of stack and is called from a recursive function
* (check_dir).
*/
static void __attribute__ ((noinline)) add_tagcache(char *path,
unsigned long mtime
#if defined(HAVE_TC_RAMCACHE) && defined(HAVE_DIRCACHE)
,int dc
#endif
)
{
struct mp3entry id3;
struct temp_file_entry entry;
bool ret;
int fd;
int idx_id = -1;
char tracknumfix[3];
int offset = 0;
int path_length = strlen(path);
bool has_albumartist;
bool has_grouping;
#ifdef SIMULATOR
/* Crude logging for the sim - to aid in debugging */
int logfd = open(ROCKBOX_DIR "/database.log",
O_WRONLY | O_APPEND | O_CREAT, 0666);
if (logfd >= 0) {
write(logfd, path, strlen(path));
write(logfd, "\n", 1);
close(logfd);
}
#endif
if (cachefd < 0)
return ;
/* Check for overlength file path. */
if (path_length > TAG_MAXLEN)
{
/* Path can't be shortened. */
logf("Too long path: %s", path);
return ;
}
/* Check if the file is supported. */
if (probe_file_format(path) == AFMT_UNKNOWN)
return ;
/* Check if the file is already cached. */
#if defined(HAVE_TC_RAMCACHE) && defined(HAVE_DIRCACHE)
idx_id = find_entry_ram(path, dc);
#endif
/* Be sure the entry doesn't exist. */
if (filenametag_fd >= 0 && idx_id < 0)
idx_id = find_entry_disk(path, false);
/* Check if file has been modified. */
if (idx_id >= 0)
{
struct index_entry idx;
/* TODO: Mark that the index exists (for fast reverse scan) */
//found_idx[idx_id/8] |= idx_id%8;
if (!get_index(-1, idx_id, &idx, true))
{
logf("failed to retrieve index entry");
return ;
}
if ((unsigned long)idx.tag_seek[tag_mtime] == mtime)
{
/* No changes to file. */
return ;
}
/* Metadata might have been changed. Delete the entry. */
logf("Re-adding: %s", path);
if (!delete_entry(idx_id))
{
logf("delete_entry failed: %d", idx_id);
return ;
}
}
fd = open(path, O_RDONLY);
if (fd < 0)
{
logf("open fail: %s", path);
return ;
}
memset(&id3, 0, sizeof(struct mp3entry));
memset(&entry, 0, sizeof(struct temp_file_entry));
memset(&tracknumfix, 0, sizeof(tracknumfix));
ret = get_metadata(&id3, fd, path);
close(fd);
if (!ret)
return ;
logf("-> %s", path);
if (id3.tracknum <= 0) /* Track number missing? */
{
id3.tracknum = -1;
}
/* Numeric tags */
entry.tag_offset[tag_year] = id3.year;
entry.tag_offset[tag_discnumber] = id3.discnum;
entry.tag_offset[tag_tracknumber] = id3.tracknum;
entry.tag_offset[tag_length] = id3.length;
entry.tag_offset[tag_bitrate] = id3.bitrate;
entry.tag_offset[tag_mtime] = mtime;
/* String tags. */
has_albumartist = id3.albumartist != NULL
&& strlen(id3.albumartist) > 0;
has_grouping = id3.grouping != NULL
&& strlen(id3.grouping) > 0;
ADD_TAG(entry, tag_filename, &path);
ADD_TAG(entry, tag_title, &id3.title);
ADD_TAG(entry, tag_artist, &id3.artist);
ADD_TAG(entry, tag_album, &id3.album);
ADD_TAG(entry, tag_genre, &id3.genre_string);
ADD_TAG(entry, tag_composer, &id3.composer);
ADD_TAG(entry, tag_comment, &id3.comment);
if (has_albumartist)
{
ADD_TAG(entry, tag_albumartist, &id3.albumartist);
}
else
{
ADD_TAG(entry, tag_albumartist, &id3.artist);
}
if (has_grouping)
{
ADD_TAG(entry, tag_grouping, &id3.grouping);
}
else
{
ADD_TAG(entry, tag_grouping, &id3.title);
}
entry.data_length = offset;
/* Write the header */
write(cachefd, &entry, sizeof(struct temp_file_entry));
/* And tags also... Correct order is critical */
write_item(path);
write_item(id3.title);
write_item(id3.artist);
write_item(id3.album);
write_item(id3.genre_string);
write_item(id3.composer);
write_item(id3.comment);
if (has_albumartist)
{
write_item(id3.albumartist);
}
else
{
write_item(id3.artist);
}
if (has_grouping)
{
write_item(id3.grouping);
}
else
{
write_item(id3.title);
}
total_entry_count++;
}
static bool tempbuf_insert(char *str, int id, int idx_id, bool unique)
{
struct tempbuf_searchidx *index = (struct tempbuf_searchidx *)tempbuf;
int len = strlen(str)+1;
int i;
unsigned crc32;
unsigned *crcbuf = (unsigned *)&tempbuf[tempbuf_size-4];
char buf[TAG_MAXLEN+32];
for (i = 0; str[i] != '\0' && i < (int)sizeof(buf)-1; i++)
buf[i] = tolower(str[i]);
buf[i] = '\0';
crc32 = crc_32(buf, i, 0xffffffff);
if (unique)
{
/* Check if the crc does not exist -> entry does not exist for sure. */
for (i = 0; i < tempbufidx; i++)
{
if (crcbuf[-i] != crc32)
continue;
if (!strcasecmp(str, index[i].str))
{
if (id < 0 || id >= lookup_buffer_depth)
{
logf("lookup buf overf.: %d", id);
return false;
}
lookup[id] = &index[i];
return true;
}
}
}
/* Insert to CRC buffer. */
crcbuf[-tempbufidx] = crc32;
tempbuf_left -= 4;
/* Insert it to the buffer. */
tempbuf_left -= len;
if (tempbuf_left - 4 < 0 || tempbufidx >= commit_entry_count-1)
return false;
if (id >= lookup_buffer_depth)
{
logf("lookup buf overf. #2: %d", id);
return false;
}
if (id >= 0)
{
lookup[id] = &index[tempbufidx];
index[tempbufidx].idlist.id = id;
}
else
index[tempbufidx].idlist.id = -1;
index[tempbufidx].idlist.next = NULL;
index[tempbufidx].idx_id = idx_id;
index[tempbufidx].seek = -1;
index[tempbufidx].str = &tempbuf[tempbuf_pos];
memcpy(index[tempbufidx].str, str, len);
tempbuf_pos += len;
tempbufidx++;
return true;
}
static int compare(const void *p1, const void *p2)
{
do_timed_yield();
struct tempbuf_searchidx *e1 = (struct tempbuf_searchidx *)p1;
struct tempbuf_searchidx *e2 = (struct tempbuf_searchidx *)p2;
if (strcmp(e1->str, UNTAGGED) == 0)
{
if (strcmp(e2->str, UNTAGGED) == 0)
return 0;
return -1;
}
else if (strcmp(e2->str, UNTAGGED) == 0)
return 1;
return strncasecmp(e1->str, e2->str, TAG_MAXLEN);
}
static int tempbuf_sort(int fd)
{
struct tempbuf_searchidx *index = (struct tempbuf_searchidx *)tempbuf;
struct tagfile_entry fe;
int i;
int length;
/* Generate reverse lookup entries. */
for (i = 0; i < lookup_buffer_depth; i++)
{
struct tempbuf_id_list *idlist;
if (!lookup[i])
continue;
if (lookup[i]->idlist.id == i)
continue;
idlist = &lookup[i]->idlist;
while (idlist->next != NULL)
idlist = idlist->next;
tempbuf_left -= sizeof(struct tempbuf_id_list);
if (tempbuf_left - 4 < 0)
return -1;
idlist->next = (struct tempbuf_id_list *)&tempbuf[tempbuf_pos];
if (tempbuf_pos & 0x03)
{
tempbuf_pos = (tempbuf_pos & ~0x03) + 0x04;
tempbuf_left -= 3;
idlist->next = (struct tempbuf_id_list *)&tempbuf[tempbuf_pos];
}
tempbuf_pos += sizeof(struct tempbuf_id_list);
idlist = idlist->next;
idlist->id = i;
idlist->next = NULL;
do_timed_yield();
}
qsort(index, tempbufidx, sizeof(struct tempbuf_searchidx), compare);
memset(lookup, 0, lookup_buffer_depth * sizeof(struct tempbuf_searchidx **));
for (i = 0; i < tempbufidx; i++)
{
struct tempbuf_id_list *idlist = &index[i].idlist;
/* Fix the lookup list. */
while (idlist != NULL)
{
if (idlist->id >= 0)
lookup[idlist->id] = &index[i];
idlist = idlist->next;
}
index[i].seek = lseek(fd, 0, SEEK_CUR);
length = strlen(index[i].str) + 1;
fe.tag_length = length;
fe.idx_id = index[i].idx_id;
/* Check the chunk alignment. */
if ((fe.tag_length + sizeof(struct tagfile_entry))
% TAGFILE_ENTRY_CHUNK_LENGTH)
{
fe.tag_length += TAGFILE_ENTRY_CHUNK_LENGTH -
((fe.tag_length + sizeof(struct tagfile_entry))
% TAGFILE_ENTRY_CHUNK_LENGTH);
}
#ifdef TAGCACHE_STRICT_ALIGN
/* Make sure the entry is long aligned. */
if (index[i].seek & 0x03)
{
logf("tempbuf_sort: alignment error!");
return -3;
}
#endif
if (ecwrite(fd, &fe, 1, tagfile_entry_ec, tc_stat.econ) !=
sizeof(struct tagfile_entry))
{
logf("tempbuf_sort: write error #1");
return -1;
}
if (write(fd, index[i].str, length) != length)
{
logf("tempbuf_sort: write error #2");
return -2;
}
/* Write some padding. */
if (fe.tag_length - length > 0)
write(fd, "XXXXXXXX", fe.tag_length - length);
}
return i;
}
inline static struct tempbuf_searchidx* tempbuf_locate(int id)
{
if (id < 0 || id >= lookup_buffer_depth)
return NULL;
return lookup[id];
}
inline static int tempbuf_find_location(int id)
{
struct tempbuf_searchidx *entry;
entry = tempbuf_locate(id);
if (entry == NULL)
return -1;
return entry->seek;
}
static bool build_numeric_indices(struct tagcache_header *h, int tmpfd)
{
struct master_header tcmh;
struct index_entry idx;
int masterfd;
int masterfd_pos;
struct temp_file_entry *entrybuf = (struct temp_file_entry *)tempbuf;
int max_entries;
int entries_processed = 0;
int i, j;
char buf[TAG_MAXLEN];
max_entries = tempbuf_size / sizeof(struct temp_file_entry) - 1;
logf("Building numeric indices...");
lseek(tmpfd, sizeof(struct tagcache_header), SEEK_SET);
if ( (masterfd = open_master_fd(&tcmh, true)) < 0)
return false;
masterfd_pos = lseek(masterfd, tcmh.tch.entry_count * sizeof(struct index_entry),
SEEK_CUR);
if (masterfd_pos == filesize(masterfd))
{
logf("we can't append!");
close(masterfd);
return false;
}
while (entries_processed < h->entry_count)
{
int count = MIN(h->entry_count - entries_processed, max_entries);
/* Read in as many entries as possible. */
for (i = 0; i < count; i++)
{
struct temp_file_entry *tfe = &entrybuf[i];
int datastart;
/* Read in numeric data. */
if (read(tmpfd, tfe, sizeof(struct temp_file_entry)) !=
sizeof(struct temp_file_entry))
{
logf("read fail #1");
close(masterfd);
return false;
}
datastart = lseek(tmpfd, 0, SEEK_CUR);
/**
* Read string data from the following tags:
* - tag_filename
* - tag_artist
* - tag_album
* - tag_title
*
* A crc32 hash is calculated from the read data
* and stored back to the data offset field kept in memory.
*/
#define tmpdb_read_string_tag(tag) \
lseek(tmpfd, tfe->tag_offset[tag], SEEK_CUR); \
if ((unsigned long)tfe->tag_length[tag] > sizeof buf) \
{ \
logf("read fail: buffer overflow"); \
close(masterfd); \
return false; \
} \
\
if (read(tmpfd, buf, tfe->tag_length[tag]) != \
tfe->tag_length[tag]) \
{ \
logf("read fail #2"); \
close(masterfd); \
return false; \
} \
\
tfe->tag_offset[tag] = crc_32(buf, strlen(buf), 0xffffffff); \
lseek(tmpfd, datastart, SEEK_SET)
tmpdb_read_string_tag(tag_filename);
tmpdb_read_string_tag(tag_artist);
tmpdb_read_string_tag(tag_album);
tmpdb_read_string_tag(tag_title);
/* Seek to the end of the string data. */
lseek(tmpfd, tfe->data_length, SEEK_CUR);
}
/* Backup the master index position. */
masterfd_pos = lseek(masterfd, 0, SEEK_CUR);
lseek(masterfd, sizeof(struct master_header), SEEK_SET);
/* Check if we can resurrect some deleted runtime statistics data. */
for (i = 0; i < tcmh.tch.entry_count; i++)
{
/* Read the index entry. */
if (ecread_index_entry(masterfd, &idx)
!= sizeof(struct index_entry))
{
logf("read fail #3");
close(masterfd);
return false;
}
/**
* Skip unless the entry is marked as being deleted
* or the data has already been resurrected.
*/
if (!(idx.flag & FLAG_DELETED) || idx.flag & FLAG_RESURRECTED)
continue;
/* Now try to match the entry. */
/**
* To succesfully match a song, the following conditions
* must apply:
*
* For numeric fields: tag_length
* - Full identical match is required
*
* If tag_filename matches, no further checking necessary.
*
* For string hashes: tag_artist, tag_album, tag_title
* - All three of these must match
*/
for (j = 0; j < count; j++)
{
struct temp_file_entry *tfe = &entrybuf[j];
/* Try to match numeric fields first. */
if (tfe->tag_offset[tag_length] != idx.tag_seek[tag_length])
continue;
/* Now it's time to do the hash matching. */
if (tfe->tag_offset[tag_filename] != idx.tag_seek[tag_filename])
{
int match_count = 0;
/* No filename match, check if we can match two other tags. */
#define tmpdb_match(tag) \
if (tfe->tag_offset[tag] == idx.tag_seek[tag]) \
match_count++
tmpdb_match(tag_artist);
tmpdb_match(tag_album);
tmpdb_match(tag_title);
if (match_count < 3)
{
/* Still no match found, give up. */
continue;
}
}
/* A match found, now copy & resurrect the statistical data. */
#define tmpdb_copy_tag(tag) \
tfe->tag_offset[tag] = idx.tag_seek[tag]
tmpdb_copy_tag(tag_playcount);
tmpdb_copy_tag(tag_rating);
tmpdb_copy_tag(tag_playtime);
tmpdb_copy_tag(tag_lastplayed);
tmpdb_copy_tag(tag_commitid);
tmpdb_copy_tag(tag_lastelapsed);
tmpdb_copy_tag(tag_lastoffset);
/* Avoid processing this entry again. */
idx.flag |= FLAG_RESURRECTED;
lseek(masterfd, -sizeof(struct index_entry), SEEK_CUR);
if (ecwrite_index_entry(masterfd, &idx) != sizeof(struct index_entry))
{
logf("masterfd writeback fail #1");
close(masterfd);
return false;
}
logf("Entry resurrected");
}
}
/* Restore the master index position. */
lseek(masterfd, masterfd_pos, SEEK_SET);
/* Commit the data to the index. */
for (i = 0; i < count; i++)
{
int loc = lseek(masterfd, 0, SEEK_CUR);
if (ecread_index_entry(masterfd, &idx) != sizeof(struct index_entry))
{
logf("read fail #3");
close(masterfd);
return false;
}
for (j = 0; j < TAG_COUNT; j++)
{
if (!TAGCACHE_IS_NUMERIC(j))
continue;
idx.tag_seek[j] = entrybuf[i].tag_offset[j];
}
idx.flag = entrybuf[i].flag;
if (idx.tag_seek[tag_commitid])
{
/* Data has been resurrected. */
idx.flag |= FLAG_DIRTYNUM;
}
else if (tc_stat.ready && current_tcmh.commitid > 0)
{
idx.tag_seek[tag_commitid] = current_tcmh.commitid;
idx.flag |= FLAG_DIRTYNUM;
}
/* Write back the updated index. */
lseek(masterfd, loc, SEEK_SET);
if (ecwrite_index_entry(masterfd, &idx) != sizeof(struct index_entry))
{
logf("write fail");
close(masterfd);
return false;
}
}
entries_processed += count;
logf("%d/%ld entries processed", entries_processed, h->entry_count);
}
close(masterfd);
return true;
}
/**
* Return values:
* > 0 success
* == 0 temporary failure
* < 0 fatal error
*/
static int build_index(int index_type, struct tagcache_header *h, int tmpfd)
{
int i;
struct tagcache_header tch;
struct master_header tcmh;
struct index_entry idxbuf[IDX_BUF_DEPTH];
int idxbuf_pos;
char buf[TAG_MAXLEN+32];
int fd = -1, masterfd;
bool error = false;
int init;
int masterfd_pos;
logf("Building index: %d", index_type);
/* Check the number of entries we need to allocate ram for. */
commit_entry_count = h->entry_count + 1;
masterfd = open_master_fd(&tcmh, false);
if (masterfd >= 0)
{
commit_entry_count += tcmh.tch.entry_count;
close(masterfd);
}
else
remove_files(); /* Just to be sure we are clean. */
/* Open the index file, which contains the tag names. */
fd = open_tag_fd(&tch, index_type, true);
if (fd >= 0)
{
logf("tch.datasize=%ld", tch.datasize);
lookup_buffer_depth = 1 +
/* First part */ commit_entry_count +
/* Second part */ (tch.datasize / TAGFILE_ENTRY_CHUNK_LENGTH);
}
else
{
lookup_buffer_depth = 1 +
/* First part */ commit_entry_count +
/* Second part */ 0;
}
logf("lookup_buffer_depth=%ld", lookup_buffer_depth);
logf("commit_entry_count=%ld", commit_entry_count);
/* Allocate buffer for all index entries from both old and new
* tag files. */
tempbufidx = 0;
tempbuf_pos = commit_entry_count * sizeof(struct tempbuf_searchidx);
/* Allocate lookup buffer. The first portion of commit_entry_count
* contains the new tags in the temporary file and the second
* part for locating entries already in the db.
*
* New tags Old tags
* +---------+---------------------------+
* | index | position/ENTRY_CHUNK_SIZE | lookup buffer
* +---------+---------------------------+
*
* Old tags are inserted to a temporary buffer with position:
* tempbuf_insert(position/ENTRY_CHUNK_SIZE, ...);
* And new tags with index:
* tempbuf_insert(idx, ...);
*
* The buffer is sorted and written into tag file:
* tempbuf_sort(...);
* leaving master index locations messed up.
*
* That is fixed using the lookup buffer for old tags:
* new_seek = tempbuf_find_location(old_seek, ...);
* and for new tags:
* new_seek = tempbuf_find_location(idx);
*/
lookup = (struct tempbuf_searchidx **)&tempbuf[tempbuf_pos];
tempbuf_pos += lookup_buffer_depth * sizeof(void **);
memset(lookup, 0, lookup_buffer_depth * sizeof(void **));
/* And calculate the remaining data space used mainly for storing
* tag data (strings). */
tempbuf_left = tempbuf_size - tempbuf_pos - 8;
if (tempbuf_left - TAGFILE_ENTRY_AVG_LENGTH * commit_entry_count < 0)
{
logf("Buffer way too small!");
return 0;
}
if (fd >= 0)
{
/**
* If tag file contains unique tags (sorted index), we will load
* it entirely into memory so we can resort it later for use with
* chunked browsing.
*/
if (TAGCACHE_IS_SORTED(index_type))
{
logf("loading tags...");
for (i = 0; i < tch.entry_count; i++)
{
struct tagfile_entry entry;
int loc = lseek(fd, 0, SEEK_CUR);
bool ret;
if (ecread_tagfile_entry(fd, &entry) != sizeof(struct tagfile_entry))
{
logf("read error #7");
close(fd);
return -2;
}
if (entry.tag_length >= (int)sizeof(buf))
{
logf("too long tag #3");
close(fd);
return -2;
}
if (read(fd, buf, entry.tag_length) != entry.tag_length)
{
logf("read error #8");
close(fd);
return -2;
}
/* Skip deleted entries. */
if (buf[0] == '\0')
continue;
/**
* Save the tag and tag id in the memory buffer. Tag id
* is saved so we can later reindex the master lookup
* table when the index gets resorted.
*/
ret = tempbuf_insert(buf, loc/TAGFILE_ENTRY_CHUNK_LENGTH
+ commit_entry_count, entry.idx_id,
TAGCACHE_IS_UNIQUE(index_type));
if (!ret)
{
close(fd);
return -3;
}
do_timed_yield();
}
logf("done");
}
else
tempbufidx = tch.entry_count;
}
else
{
/**
* Creating new index file to store the tags. No need to preload
* anything whether the index type is sorted or not.
*/
snprintf(buf, sizeof buf, TAGCACHE_FILE_INDEX, index_type);
fd = open(buf, O_WRONLY | O_CREAT | O_TRUNC, 0666);
if (fd < 0)
{
logf("%s open fail", buf);
return -2;
}
tch.magic = TAGCACHE_MAGIC;
tch.entry_count = 0;
tch.datasize = 0;
if (ecwrite(fd, &tch, 1, tagcache_header_ec, tc_stat.econ)
!= sizeof(struct tagcache_header))
{
logf("header write failed");
close(fd);
return -2;
}
}
/* Loading the tag lookup file as "master file". */
logf("Loading index file");
masterfd = open(TAGCACHE_FILE_MASTER, O_RDWR);
if (masterfd < 0)
{
logf("Creating new DB");
masterfd = open(TAGCACHE_FILE_MASTER, O_WRONLY | O_CREAT | O_TRUNC, 0666);
if (masterfd < 0)
{
logf("Failure to create index file (%s)", TAGCACHE_FILE_MASTER);
close(fd);
return -2;
}
/* Write the header (write real values later). */
memset(&tcmh, 0, sizeof(struct master_header));
tcmh.tch = *h;
tcmh.tch.entry_count = 0;
tcmh.tch.datasize = 0;
tcmh.dirty = true;
ecwrite(masterfd, &tcmh, 1, master_header_ec, tc_stat.econ);
init = true;
masterfd_pos = lseek(masterfd, 0, SEEK_CUR);
}
else
{
/**
* Master file already exists so we need to process the current
* file first.
*/
init = false;
if (ecread(masterfd, &tcmh, 1, master_header_ec, tc_stat.econ) !=
sizeof(struct master_header) || tcmh.tch.magic != TAGCACHE_MAGIC)
{
logf("header error");
close(fd);
close(masterfd);
return -2;
}
/**
* If we reach end of the master file, we need to expand it to
* hold new tags. If the current index is not sorted, we can
* simply append new data to end of the file.
* However, if the index is sorted, we need to update all tag
* pointers in the master file for the current index.
*/
masterfd_pos = lseek(masterfd, tcmh.tch.entry_count * sizeof(struct index_entry),
SEEK_CUR);
if (masterfd_pos == filesize(masterfd))
{
logf("appending...");
init = true;
}
}
/**
* Load new unique tags in memory to be sorted later and added
* to the master lookup file.
*/
if (TAGCACHE_IS_SORTED(index_type))
{
lseek(tmpfd, sizeof(struct tagcache_header), SEEK_SET);
/* h is the header of the temporary file containing new tags. */
logf("inserting new tags...");
for (i = 0; i < h->entry_count; i++)
{
struct temp_file_entry entry;
if (read(tmpfd, &entry, sizeof(struct temp_file_entry)) !=
sizeof(struct temp_file_entry))
{
logf("read fail #3");
error = true;
goto error_exit;
}
/* Read data. */
if (entry.tag_length[index_type] >= (long)sizeof(buf))
{
logf("too long entry!");
error = true;
goto error_exit;
}
lseek(tmpfd, entry.tag_offset[index_type], SEEK_CUR);
if (read(tmpfd, buf, entry.tag_length[index_type]) !=
entry.tag_length[index_type])
{
logf("read fail #4");
error = true;
goto error_exit;
}
if (TAGCACHE_IS_UNIQUE(index_type))
error = !tempbuf_insert(buf, i, -1, true);
else
error = !tempbuf_insert(buf, i, tcmh.tch.entry_count + i, false);
if (error)
{
logf("insert error");
goto error_exit;
}
/* Skip to next. */
lseek(tmpfd, entry.data_length - entry.tag_offset[index_type] -
entry.tag_length[index_type], SEEK_CUR);
do_timed_yield();
}
logf("done");
/* Sort the buffer data and write it to the index file. */
lseek(fd, sizeof(struct tagcache_header), SEEK_SET);
/**
* We need to truncate the index file now. There can be junk left
* at the end of file (however, we _should_ always follow the
* entry_count and don't crash with that).
*/
ftruncate(fd, lseek(fd, 0, SEEK_CUR));
i = tempbuf_sort(fd);
if (i < 0)
goto error_exit;
logf("sorted %d tags", i);
/**
* Now update all indexes in the master lookup file.
*/
logf("updating indices...");
lseek(masterfd, sizeof(struct master_header), SEEK_SET);
for (i = 0; i < tcmh.tch.entry_count; i += idxbuf_pos)
{
int j;
int loc = lseek(masterfd, 0, SEEK_CUR);
idxbuf_pos = MIN(tcmh.tch.entry_count - i, IDX_BUF_DEPTH);
if (ecread(masterfd, idxbuf, idxbuf_pos, index_entry_ec, tc_stat.econ)
!= (int)sizeof(struct index_entry)*idxbuf_pos)
{
logf("read fail #5");
error = true;
goto error_exit ;
}
lseek(masterfd, loc, SEEK_SET);
for (j = 0; j < idxbuf_pos; j++)
{
if (idxbuf[j].flag & FLAG_DELETED)
{
/* We can just ignore deleted entries. */
// idxbuf[j].tag_seek[index_type] = 0;
continue;
}
idxbuf[j].tag_seek[index_type] = tempbuf_find_location(
idxbuf[j].tag_seek[index_type]/TAGFILE_ENTRY_CHUNK_LENGTH
+ commit_entry_count);
if (idxbuf[j].tag_seek[index_type] < 0)
{
logf("update error: %ld/%d/%ld",
idxbuf[j].flag, i+j, tcmh.tch.entry_count);
error = true;
goto error_exit;
}
do_timed_yield();
}
/* Write back the updated index. */
if (ecwrite(masterfd, idxbuf, idxbuf_pos,
index_entry_ec, tc_stat.econ) !=
(int)sizeof(struct index_entry)*idxbuf_pos)
{
logf("write fail");
error = true;
goto error_exit;
}
}
logf("done");
}
/**
* Walk through the temporary file containing the new tags.
*/
// build_normal_index(h, tmpfd, masterfd, idx);
logf("updating new indices...");
lseek(masterfd, masterfd_pos, SEEK_SET);
lseek(tmpfd, sizeof(struct tagcache_header), SEEK_SET);
lseek(fd, 0, SEEK_END);
for (i = 0; i < h->entry_count; i += idxbuf_pos)
{
int j;
idxbuf_pos = MIN(h->entry_count - i, IDX_BUF_DEPTH);
if (init)
{
memset(idxbuf, 0, sizeof(struct index_entry)*IDX_BUF_DEPTH);
}
else
{
int loc = lseek(masterfd, 0, SEEK_CUR);
if (ecread(masterfd, idxbuf, idxbuf_pos, index_entry_ec, tc_stat.econ)
!= (int)sizeof(struct index_entry)*idxbuf_pos)
{
logf("read fail #6");
error = true;
break ;
}
lseek(masterfd, loc, SEEK_SET);
}
/* Read entry headers. */
for (j = 0; j < idxbuf_pos; j++)
{
if (!TAGCACHE_IS_SORTED(index_type))
{
struct temp_file_entry entry;
struct tagfile_entry fe;
if (read(tmpfd, &entry, sizeof(struct temp_file_entry)) !=
sizeof(struct temp_file_entry))
{
logf("read fail #7");
error = true;
break ;
}
/* Read data. */
if (entry.tag_length[index_type] >= (int)sizeof(buf))
{
logf("too long entry!");
logf("length=%d", entry.tag_length[index_type]);
logf("pos=0x%02lx", lseek(tmpfd, 0, SEEK_CUR));
error = true;
break ;
}
lseek(tmpfd, entry.tag_offset[index_type], SEEK_CUR);
if (read(tmpfd, buf, entry.tag_length[index_type]) !=
entry.tag_length[index_type])
{
logf("read fail #8");
logf("offset=0x%02lx", entry.tag_offset[index_type]);
logf("length=0x%02x", entry.tag_length[index_type]);
error = true;
break ;
}
/* Write to index file. */
idxbuf[j].tag_seek[index_type] = lseek(fd, 0, SEEK_CUR);
fe.tag_length = entry.tag_length[index_type];
fe.idx_id = tcmh.tch.entry_count + i + j;
ecwrite(fd, &fe, 1, tagfile_entry_ec, tc_stat.econ);
write(fd, buf, fe.tag_length);
tempbufidx++;
/* Skip to next. */
lseek(tmpfd, entry.data_length - entry.tag_offset[index_type] -
entry.tag_length[index_type], SEEK_CUR);
}
else
{
/* Locate the correct entry from the sorted array. */
idxbuf[j].tag_seek[index_type] = tempbuf_find_location(i + j);
if (idxbuf[j].tag_seek[index_type] < 0)
{
logf("entry not found (%d)", j);
error = true;
break ;
}
}
}
/* Write index. */
if (ecwrite(masterfd, idxbuf, idxbuf_pos,
index_entry_ec, tc_stat.econ) !=
(int)sizeof(struct index_entry)*idxbuf_pos)
{
logf("tagcache: write fail #4");
error = true;
break ;
}
do_timed_yield();
}
logf("done");
/* Finally write the header. */
tch.magic = TAGCACHE_MAGIC;
tch.entry_count = tempbufidx;
tch.datasize = lseek(fd, 0, SEEK_END) - sizeof(struct tagcache_header);
lseek(fd, 0, SEEK_SET);
ecwrite(fd, &tch, 1, tagcache_header_ec, tc_stat.econ);
if (index_type != tag_filename)
h->datasize += tch.datasize;
logf("s:%d/%ld/%ld", index_type, tch.datasize, h->datasize);
error_exit:
close(fd);
close(masterfd);
if (error)
return -2;
return 1;
}
static bool commit(void)
{
struct tagcache_header tch;
struct master_header tcmh;
int i, len, rc;
int tmpfd;
int masterfd;
#ifdef HAVE_DIRCACHE
bool dircache_buffer_stolen = false;
#endif
#ifdef HAVE_TC_RAMCACHE
bool ramcache_buffer_stolen = false;
#endif
bool local_allocation = false;
logf("committing tagcache");
while (write_lock)
sleep(1);
tmpfd = open(TAGCACHE_FILE_TEMP, O_RDONLY);
if (tmpfd < 0)
{
logf("nothing to commit");
return true;
}
/* Load the header. */
len = sizeof(struct tagcache_header);
rc = read(tmpfd, &tch, len);
if (tch.magic != TAGCACHE_MAGIC || rc != len)
{
logf("incorrect tmpheader");
close(tmpfd);
remove(TAGCACHE_FILE_TEMP);
return false;
}
if (tch.entry_count == 0)
{
logf("nothing to commit");
close(tmpfd);
remove(TAGCACHE_FILE_TEMP);
return true;
}
/* Fully initialize existing headers (if any) before going further. */
tc_stat.ready = check_all_headers();
#ifdef HAVE_EEPROM_SETTINGS
remove(TAGCACHE_STATEFILE);
#endif
/* At first be sure to unload the ramcache! */
#ifdef HAVE_TC_RAMCACHE
tc_stat.ramcache = false;
#endif
read_lock++;
/* Try to steal every buffer we can :) */
if (tempbuf_size == 0)
local_allocation = true;
#if 0 /* FIXME: How much big? dircache buffer can no longer be taken but
may be freed to make room and the cache resumed. --jethead71 */
#ifdef HAVE_DIRCACHE
if (tempbuf_size == 0)
{
/* Shut down dircache to free its allocation. */
dircache_free_buffer();
if (tempbuf_size > 0)
{
dircache_buffer_stolen = true;
}
}
#endif
#endif
#ifdef HAVE_TC_RAMCACHE
if (tempbuf_size == 0 && tc_stat.ramcache_allocated > 0)
{
tempbuf = (char *)(ramcache_hdr + 1);
tempbuf_size = tc_stat.ramcache_allocated - sizeof(struct ramcache_header) - 128;
tempbuf_size &= ~0x03;
move_lock++;
ramcache_buffer_stolen = true;
}
#endif
/* And finally fail if there are no buffers available. */
if (tempbuf_size == 0)
{
logf("delaying commit until next boot");
tc_stat.commit_delayed = true;
close(tmpfd);
read_lock--;
return false;
}
logf("commit %ld entries...", tch.entry_count);
/* Mark DB dirty so it will stay disabled if commit fails. */
current_tcmh.dirty = true;
update_master_header();
/* Now create the index files. */
tc_stat.commit_step = 0;
tch.datasize = 0;
tc_stat.commit_delayed = false;
for (i = 0; i < TAG_COUNT; i++)
{
int ret;
if (TAGCACHE_IS_NUMERIC(i))
continue;
tc_stat.commit_step++;
ret = build_index(i, &tch, tmpfd);
if (ret <= 0)
{
close(tmpfd);
logf("tagcache failed init");
if (ret == 0)
tc_stat.commit_delayed = true;
tc_stat.commit_step = 0;
read_lock--;
return false;
}
}
if (!build_numeric_indices(&tch, tmpfd))
{
logf("Failure to commit numeric indices");
close(tmpfd);
tc_stat.commit_step = 0;
read_lock--;
return false;
}
close(tmpfd);
tc_stat.commit_step = 0;
/* Update the master index headers. */
if ( (masterfd = open_master_fd(&tcmh, true)) < 0)
{
read_lock--;
return false;
}
remove(TAGCACHE_FILE_TEMP);
tcmh.tch.entry_count += tch.entry_count;
tcmh.tch.datasize = sizeof(struct master_header)
+ sizeof(struct index_entry) * tcmh.tch.entry_count
+ tch.datasize;
tcmh.dirty = false;
tcmh.commitid++;
lseek(masterfd, 0, SEEK_SET);
ecwrite(masterfd, &tcmh, 1, master_header_ec, tc_stat.econ);
close(masterfd);
logf("tagcache committed");
tc_stat.ready = check_all_headers();
tc_stat.readyvalid = true;
if (local_allocation)
{
tempbuf = NULL;
tempbuf_size = 0;
}
#ifdef HAVE_DIRCACHE
/* Rebuild the dircache, if we stole the buffer. */
if (dircache_buffer_stolen)
dircache_resume();
#endif
#ifdef HAVE_TC_RAMCACHE
if (ramcache_buffer_stolen)
move_lock--;
/* Reload tagcache. */
if (tc_stat.ramcache_allocated > 0)
tagcache_start_scan();
#endif
read_lock--;
return true;
}
#ifndef __PCTOOL__
static int tempbuf_handle;
#endif
static void allocate_tempbuf(void)
{
/* Yeah, malloc would be really nice now :) */
#ifdef __PCTOOL__
tempbuf_size = 32*1024*1024;
tempbuf = malloc(tempbuf_size);
#else
tempbuf_handle = core_alloc_maximum("tc tempbuf", &tempbuf_size, NULL);
tempbuf = core_get_data(tempbuf_handle);
#endif
}
static void free_tempbuf(void)
{
if (tempbuf_size == 0)
return ;
#ifdef __PCTOOL__
free(tempbuf);
#else
tempbuf_handle = core_free(tempbuf_handle);
#endif
tempbuf = NULL;
tempbuf_size = 0;
}
#ifndef __PCTOOL__
static bool modify_numeric_entry(int masterfd, int idx_id, int tag, long data)
{
struct index_entry idx;
if (!tc_stat.ready)
return false;
if (!TAGCACHE_IS_NUMERIC(tag))
return false;
if (!get_index(masterfd, idx_id, &idx, false))
return false;
idx.tag_seek[tag] = data;
idx.flag |= FLAG_DIRTYNUM;
return write_index(masterfd, idx_id, &idx);
}
#if 0
bool tagcache_modify_numeric_entry(struct tagcache_search *tcs,
int tag, long data)
{
struct master_header myhdr;
if (tcs->masterfd < 0)
{
if ( (tcs->masterfd = open_master_fd(&myhdr, true)) < 0)
return false;
}
return modify_numeric_entry(tcs->masterfd, tcs->idx_id, tag, data);
}
#endif
static bool command_queue_is_full(void)
{
int next;
next = command_queue_widx + 1;
if (next >= TAGCACHE_COMMAND_QUEUE_LENGTH)
next = 0;
return (next == command_queue_ridx);
}
static void command_queue_sync_callback(void)
{
struct master_header myhdr;
int masterfd;
mutex_lock(&command_queue_mutex);
if ( (masterfd = open_master_fd(&myhdr, true)) < 0)
return;
while (command_queue_ridx != command_queue_widx)
{
struct tagcache_command_entry *ce = &command_queue[command_queue_ridx];
switch (ce->command)
{
case CMD_UPDATE_MASTER_HEADER:
{
close(masterfd);
update_master_header();
/* Re-open the masterfd. */
if ( (masterfd = open_master_fd(&myhdr, true)) < 0)
return;
break;
}
case CMD_UPDATE_NUMERIC:
{
modify_numeric_entry(masterfd, ce->idx_id, ce->tag, ce->data);
break;
}
}
if (++command_queue_ridx >= TAGCACHE_COMMAND_QUEUE_LENGTH)
command_queue_ridx = 0;
}
close(masterfd);
tc_stat.queue_length = 0;
mutex_unlock(&command_queue_mutex);
}
static void run_command_queue(bool force)
{
if (COMMAND_QUEUE_IS_EMPTY)
return;
if (force || command_queue_is_full())
command_queue_sync_callback();
else
register_storage_idle_func(command_queue_sync_callback);
}
static void queue_command(int cmd, long idx_id, int tag, long data)
{
while (1)
{
int next;
mutex_lock(&command_queue_mutex);
next = command_queue_widx + 1;
if (next >= TAGCACHE_COMMAND_QUEUE_LENGTH)
next = 0;
/* Make sure queue is not full. */
if (next != command_queue_ridx)
{
struct tagcache_command_entry *ce = &command_queue[command_queue_widx];
ce->command = cmd;
ce->idx_id = idx_id;
ce->tag = tag;
ce->data = data;
command_queue_widx = next;
tc_stat.queue_length++;
mutex_unlock(&command_queue_mutex);
break;
}
/* Queue is full, try again later... */
mutex_unlock(&command_queue_mutex);
sleep(1);
}
}
long tagcache_increase_serial(void)
{
long old;
if (!tc_stat.ready)
return -2;
while (read_lock)
sleep(1);
old = current_tcmh.serial++;
queue_command(CMD_UPDATE_MASTER_HEADER, 0, 0, 0);
return old;
}
void tagcache_update_numeric(int idx_id, int tag, long data)
{
queue_command(CMD_UPDATE_NUMERIC, idx_id, tag, data);
}
#endif /* !__PCTOOL__ */
static bool write_tag(int fd, const char *tagstr, const char *datastr)
{
char buf[512];
int i;
snprintf(buf, sizeof buf, "%s=\"", tagstr);
for (i = strlen(buf); i < (long)sizeof(buf)-4; i++)
{
if (*datastr == '\0')
break;
if (*datastr == '"' || *datastr == '\\')
buf[i++] = '\\';
else if (*datastr == '\n')
{
buf[i++] = '\\';
buf[i] = 'n';
continue;
}
buf[i] = *(datastr++);
}
strcpy(&buf[i], "\" ");
write(fd, buf, i + 2);
return true;
}
#ifndef __PCTOOL__
static bool read_tag(char *dest, long size,
const char *src, const char *tagstr)
{
int pos;
char current_tag[32];
while (*src != '\0')
{
/* Skip all whitespace */
while (*src == ' ')
src++;
if (*src == '\0')
break;
pos = 0;
/* Read in tag name */
while (*src != '=' && *src != ' ')
{
current_tag[pos] = *src;
src++;
pos++;
if (*src == '\0' || pos >= (long)sizeof(current_tag))
return false;
}
current_tag[pos] = '\0';
/* Read in tag data */
/* Find the start. */
while (*src != '"' && *src != '\0')
src++;
if (*src == '\0' || *(++src) == '\0')
return false;
/* Read the data. */
for (pos = 0; pos < size; pos++)
{
if (*src == '\0')
break;
if (*src == '\\')
{
src++;
if (*src == 'n')
dest[pos] = '\n';
else
dest[pos] = *src;
src++;
continue;
}
if (*src == '\0')
break;
if (*src == '"')
{
src++;
break;
}
dest[pos] = *(src++);
}
dest[pos] = '\0';
if (!strcasecmp(tagstr, current_tag))
return true;
}
return false;
}
static int parse_changelog_line(int line_n, char *buf, void *parameters)
{
struct index_entry idx;
char tag_data[TAG_MAXLEN+32];
int idx_id;
long masterfd = (long)parameters;
const int import_tags[] = { tag_playcount, tag_rating, tag_playtime,
tag_lastplayed, tag_commitid, tag_lastelapsed,
tag_lastoffset };
int i;
(void)line_n;
if (*buf == '#')
return 0;
/* logf("%d/%s", line_n, buf); */
if (!read_tag(tag_data, sizeof tag_data, buf, "filename"))
{
logf("%d/filename missing", line_n);
logf("-> %s", buf);
return 0;
}
idx_id = find_index(tag_data);
if (idx_id < 0)
{
logf("%d/entry not found", line_n);
return 0;
}
if (!get_index(masterfd, idx_id, &idx, false))
{
logf("%d/failed to retrieve index entry", line_n);
return 0;
}
/* Stop if tag has already been modified. */
if (idx.flag & FLAG_DIRTYNUM)
return 0;
logf("%d/import: %s", line_n, tag_data);
idx.flag |= FLAG_DIRTYNUM;
for (i = 0; i < (long)(sizeof(import_tags)/sizeof(import_tags[0])); i++)
{
int data;
if (!read_tag(tag_data, sizeof tag_data, buf,
tagcache_tag_to_str(import_tags[i])))
{
continue;
}
data = atoi(tag_data);
if (data < 0)
continue;
idx.tag_seek[import_tags[i]] = data;
if (import_tags[i] == tag_lastplayed && data >= current_tcmh.serial)
current_tcmh.serial = data + 1;
else if (import_tags[i] == tag_commitid && data >= current_tcmh.commitid)
current_tcmh.commitid = data + 1;
}
return write_index(masterfd, idx_id, &idx) ? 0 : -5;
}
bool tagcache_import_changelog(void)
{
struct master_header myhdr;
struct tagcache_header tch;
int clfd;
long masterfd;
char buf[2048];
if (!tc_stat.ready)
return false;
while (read_lock)
sleep(1);
clfd = open(TAGCACHE_FILE_CHANGELOG, O_RDONLY);
if (clfd < 0)
{
logf("failure to open changelog");
return false;
}
if ( (masterfd = open_master_fd(&myhdr, true)) < 0)
{
close(clfd);
return false;
}
write_lock++;
filenametag_fd = open_tag_fd(&tch, tag_filename, false);
fast_readline(clfd, buf, sizeof buf, (long *)masterfd,
parse_changelog_line);
close(clfd);
close(masterfd);
if (filenametag_fd >= 0)
{
close(filenametag_fd);
filenametag_fd = -1;
}
write_lock--;
update_master_header();
return true;
}
#endif /* !__PCTOOL__ */
bool tagcache_create_changelog(struct tagcache_search *tcs)
{
struct master_header myhdr;
struct index_entry idx;
char buf[TAG_MAXLEN+32];
char temp[32];
int clfd;
int i, j;
if (!tc_stat.ready)
return false;
if (!tagcache_search(tcs, tag_filename))
return false;
/* Initialize the changelog */
clfd = open(TAGCACHE_FILE_CHANGELOG, O_WRONLY | O_CREAT | O_TRUNC, 0666);
if (clfd < 0)
{
logf("failure to open changelog");
return false;
}
if (tcs->masterfd < 0)
{
if ( (tcs->masterfd = open_master_fd(&myhdr, false)) < 0)
{
close(clfd);
return false;
}
}
else
{
lseek(tcs->masterfd, 0, SEEK_SET);
ecread(tcs->masterfd, &myhdr, 1, master_header_ec, tc_stat.econ);
}
write(clfd, "## Changelog version 1\n", 23);
for (i = 0; i < myhdr.tch.entry_count; i++)
{
if (ecread_index_entry(tcs->masterfd, &idx) != sizeof(struct index_entry))
{
logf("read error #9");
tagcache_search_finish(tcs);
close(clfd);
return false;
}
/* Skip until the entry found has been modified. */
if (! (idx.flag & FLAG_DIRTYNUM) )
continue;
/* Skip deleted entries too. */
if (idx.flag & FLAG_DELETED)
continue;
/* Now retrieve all tags. */
for (j = 0; j < TAG_COUNT; j++)
{
if (TAGCACHE_IS_NUMERIC(j))
{
snprintf(temp, sizeof temp, "%d", (int)idx.tag_seek[j]);
write_tag(clfd, tagcache_tag_to_str(j), temp);
continue;
}
tcs->type = j;
tagcache_retrieve(tcs, i, tcs->type, buf, sizeof buf);
write_tag(clfd, tagcache_tag_to_str(j), buf);
}
write(clfd, "\n", 1);
do_timed_yield();
}
close(clfd);
tagcache_search_finish(tcs);
return true;
}
static bool delete_entry(long idx_id)
{
int fd = -1;
int masterfd = -1;
int tag, i;
struct index_entry idx, myidx;
struct master_header myhdr;
char buf[TAG_MAXLEN+32];
int in_use[TAG_COUNT];
logf("delete_entry(): %ld", idx_id);
#ifdef HAVE_TC_RAMCACHE
/* At first mark the entry removed from ram cache. */
if (tc_stat.ramcache)
ramcache_hdr->indices[idx_id].flag |= FLAG_DELETED;
#endif
if ( (masterfd = open_master_fd(&myhdr, true) ) < 0)
return false;
lseek(masterfd, idx_id * sizeof(struct index_entry), SEEK_CUR);
if (ecread_index_entry(masterfd, &myidx) != sizeof(struct index_entry))
{
logf("delete_entry(): read error");
goto cleanup;
}
if (myidx.flag & FLAG_DELETED)
{
logf("delete_entry(): already deleted!");
goto cleanup;
}
myidx.flag |= FLAG_DELETED;
lseek(masterfd, -sizeof(struct index_entry), SEEK_CUR);
if (ecwrite_index_entry(masterfd, &myidx) != sizeof(struct index_entry))
{
logf("delete_entry(): write_error #1");
goto cleanup;
}
/* Now check which tags are no longer in use (if any) */
for (tag = 0; tag < TAG_COUNT; tag++)
in_use[tag] = 0;
lseek(masterfd, sizeof(struct master_header), SEEK_SET);
for (i = 0; i < myhdr.tch.entry_count; i++)
{
struct index_entry *idxp;
#ifdef HAVE_TC_RAMCACHE
/* Use RAM DB if available for greater speed */
if (tc_stat.ramcache)
idxp = &ramcache_hdr->indices[i];
else
#endif
{
if (ecread_index_entry(masterfd, &idx) != sizeof(struct index_entry))
{
logf("delete_entry(): read error #2");
goto cleanup;
}
idxp = &idx;
}
if (idxp->flag & FLAG_DELETED)
continue;
for (tag = 0; tag < TAG_COUNT; tag++)
{
if (TAGCACHE_IS_NUMERIC(tag))
continue;
if (idxp->tag_seek[tag] == myidx.tag_seek[tag])
in_use[tag]++;
}
}
/* Now delete all tags no longer in use. */
for (tag = 0; tag < TAG_COUNT; tag++)
{
struct tagcache_header tch;
int oldseek = myidx.tag_seek[tag];
if (TAGCACHE_IS_NUMERIC(tag))
continue;
/**
* Replace tag seek with a hash value of the field string data.
* That way runtime statistics of moved or altered files can be
* resurrected.
*/
#ifdef HAVE_TC_RAMCACHE
if (tc_stat.ramcache && tag != tag_filename)
{
struct tagfile_entry *tfe;
int32_t *seek = &ramcache_hdr->indices[idx_id].tag_seek[tag];
tfe = (struct tagfile_entry *)&ramcache_hdr->tags[tag][*seek];
move_lock++; /* protect tfe and seek if crc_32() yield()s */
*seek = crc_32(tfe->tag_data, strlen(tfe->tag_data), 0xffffffff);
move_lock--;
myidx.tag_seek[tag] = *seek;
}
else
#endif
{
struct tagfile_entry tfe;
/* Open the index file, which contains the tag names. */
if ((fd = open_tag_fd(&tch, tag, true)) < 0)
goto cleanup;
/* Skip the header block */
lseek(fd, myidx.tag_seek[tag], SEEK_SET);
if (ecread_tagfile_entry(fd, &tfe) != sizeof(struct tagfile_entry))
{
logf("delete_entry(): read error #3");
goto cleanup;
}
if (read(fd, buf, tfe.tag_length) != tfe.tag_length)
{
logf("delete_entry(): read error #4");
goto cleanup;
}
myidx.tag_seek[tag] = crc_32(buf, strlen(buf), 0xffffffff);
}
if (in_use[tag])
{
logf("in use: %d/%d", tag, in_use[tag]);
if (fd >= 0)
{
close(fd);
fd = -1;
}
continue;
}
#ifdef HAVE_TC_RAMCACHE
/* Delete from ram. */
if (tc_stat.ramcache && tag != tag_filename)
{
struct tagfile_entry *tagentry =
(struct tagfile_entry *)&ramcache_hdr->tags[tag][oldseek];
tagentry->tag_data[0] = '\0';
}
#endif
/* Open the index file, which contains the tag names. */
if (fd < 0)
{
if ((fd = open_tag_fd(&tch, tag, true)) < 0)
goto cleanup;
}
/* Skip the header block */
lseek(fd, oldseek + sizeof(struct tagfile_entry), SEEK_SET);
/* Debug, print 10 first characters of the tag
read(fd, buf, 10);
buf[10]='\0';
logf("TAG:%s", buf);
lseek(fd, -10, SEEK_CUR);
*/
/* Write first data byte in tag as \0 */
write(fd, "", 1);
/* Now tag data has been removed */
close(fd);
fd = -1;
}
/* Write index entry back into master index. */
lseek(masterfd, sizeof(struct master_header) +
(idx_id * sizeof(struct index_entry)), SEEK_SET);
if (ecwrite_index_entry(masterfd, &myidx) != sizeof(struct index_entry))
{
logf("delete_entry(): write_error #2");
goto cleanup;
}
close(masterfd);
return true;
cleanup:
if (fd >= 0)
close(fd);
if (masterfd >= 0)
close(masterfd);
return false;
}
#ifndef __PCTOOL__
/**
* Returns true if there is an event waiting in the queue
* that requires the current operation to be aborted.
*/
static bool check_event_queue(void)
{
struct queue_event ev;
if(!queue_peek(&tagcache_queue, &ev))
return false;
switch (ev.id)
{
case Q_STOP_SCAN:
case SYS_POWEROFF:
case SYS_USB_CONNECTED:
return true;
}
return false;
}
#endif
#ifdef HAVE_TC_RAMCACHE
static void fix_ramcache(void* old_addr, void* new_addr)
{
ptrdiff_t offpos = new_addr - old_addr;
for (int i = 0; i < TAG_COUNT; i++)
ramcache_hdr->tags[i] += offpos;
}
static int move_cb(int handle, void* current, void* new)
{
(void)handle;
if (move_lock > 0)
return BUFLIB_CB_CANNOT_MOVE;
fix_ramcache(current, new);
ramcache_hdr = new;
return BUFLIB_CB_OK;
}
static struct buflib_callbacks ops = {
.move_callback = move_cb,
.shrink_callback = NULL,
};
static bool allocate_tagcache(void)
{
struct master_header tcmh;
int fd;
/* Load the header. */
if ( (fd = open_master_fd(&tcmh, false)) < 0)
{
ramcache_hdr = NULL;
return false;
}
close(fd);
/**
* Now calculate the required cache size plus
* some extra space for alignment fixes.
*/
tc_stat.ramcache_allocated = tcmh.tch.datasize + 256 + TAGCACHE_RESERVE +
sizeof(struct ramcache_header) + TAG_COUNT*sizeof(void *);
int handle = core_alloc_ex("tc ramcache", tc_stat.ramcache_allocated, &ops);
ramcache_hdr = core_get_data(handle);
memset(ramcache_hdr, 0, sizeof(struct ramcache_header));
memcpy(&current_tcmh, &tcmh, sizeof current_tcmh);
logf("tagcache: %d bytes allocated.", tc_stat.ramcache_allocated);
return true;
}
# ifdef HAVE_EEPROM_SETTINGS
static bool tagcache_dumpload(void)
{
struct statefile_header shdr;
int fd, rc, handle;
fd = open(TAGCACHE_STATEFILE, O_RDONLY);
if (fd < 0)
{
logf("no tagcache statedump");
return false;
}
/* Check the statefile memory placement */
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");
ramcache_hdr = NULL;
close(fd);
return false;
}
/* Lets allocate real memory and load it */
handle = core_alloc_ex("tc ramcache", shdr.tc_stat.ramcache_allocated, &ops);
ramcache_hdr = core_get_data(handle);
move_lock++;
rc = read(fd, ramcache_hdr, shdr.tc_stat.ramcache_allocated);
move_lock--;
close(fd);
if (rc != shdr.tc_stat.ramcache_allocated)
{
logf("read failure!");
ramcache_hdr = NULL;
return false;
}
memcpy(&tc_stat, &shdr.tc_stat, sizeof(struct tagcache_stat));
/* Now fix the pointers */
fix_ramcache(shdr.hdr, ramcache_hdr);
/* Load the tagcache master header (should match the actual DB file header). */
memcpy(&current_tcmh, &shdr.mh, sizeof current_tcmh);
return true;
}
static bool tagcache_dumpsave(void)
{
struct statefile_header shdr;
int fd;
if (!tc_stat.ramcache)
return false;
fd = open(TAGCACHE_STATEFILE, O_WRONLY | O_CREAT | O_TRUNC, 0666);
if (fd < 0)
{
logf("failed to create a statedump");
return false;
}
/* Create the header */
shdr.magic = TAGCACHE_STATEFILE_MAGIC;
shdr.hdr = ramcache_hdr;
memcpy(&shdr.mh, &current_tcmh, sizeof current_tcmh);
memcpy(&shdr.tc_stat, &tc_stat, sizeof tc_stat);
write(fd, &shdr, sizeof shdr);
/* And dump the data too */
move_lock++;
write(fd, ramcache_hdr, tc_stat.ramcache_allocated);
move_lock--;
close(fd);
return true;
}
# endif
static bool load_tagcache(void)
{
struct tagcache_header *tch;
struct master_header tcmh;
long bytesleft = tc_stat.ramcache_allocated - sizeof(struct ramcache_header);
struct index_entry *idx;
int rc, fd;
char *p;
int i, tag;
# ifdef HAVE_DIRCACHE
while (dircache_is_initializing())
sleep(1);
dircache_set_appflag(DIRCACHE_APPFLAG_TAGCACHE);
# endif
logf("loading tagcache to ram...");
fd = open(TAGCACHE_FILE_MASTER, O_RDONLY);
if (fd < 0)
{
logf("tagcache open failed");
return false;
}
if (ecread(fd, &tcmh, 1, master_header_ec, tc_stat.econ)
!= sizeof(struct master_header)
|| tcmh.tch.magic != TAGCACHE_MAGIC)
{
logf("incorrect header");
return false;
}
/* Master header copy should already match, this can be redundant to do. */
memcpy(&current_tcmh, &tcmh, sizeof current_tcmh);
move_lock++; /* lock for the reset of the scan, simpler to handle */
idx = ramcache_hdr->indices;
/* Load the master index table. */
for (i = 0; i < tcmh.tch.entry_count; i++)
{
bytesleft -= sizeof(struct index_entry);
if (bytesleft < 0)
{
logf("too big tagcache.");
goto failure;
}
/* DEBUG: After tagcache commit and dircache rebuild, hdr-sturcture
* may become corrupt. */
rc = ecread_index_entry(fd, idx);
if (rc != sizeof(struct index_entry))
{
logf("read error #10");
goto failure;
}
idx++;
}
close(fd);
/* Load the tags. */
p = (char *)idx;
for (tag = 0; tag < TAG_COUNT; tag++)
{
struct tagfile_entry *fe;
char buf[TAG_MAXLEN+32];
if (TAGCACHE_IS_NUMERIC(tag))
continue ;
//p = ((void *)p+1);
p = (char *)((long)p & ~0x03) + 0x04;
ramcache_hdr->tags[tag] = p;
/* Check the header. */
tch = (struct tagcache_header *)p;
p += sizeof(struct tagcache_header);
if ( (fd = open_tag_fd(tch, tag, false)) < 0)
goto failure_nofd;
for (ramcache_hdr->entry_count[tag] = 0;
ramcache_hdr->entry_count[tag] < tch->entry_count;
ramcache_hdr->entry_count[tag]++)
{
long pos;
if (do_timed_yield())
{
/* Abort if we got a critical event in queue */
if (check_event_queue())
goto failure;
}
fe = (struct tagfile_entry *)p;
pos = lseek(fd, 0, SEEK_CUR);
rc = ecread_tagfile_entry(fd, fe);
if (rc != sizeof(struct tagfile_entry))
{
/* End of lookup table. */
logf("read error #11");
goto failure;
}
/* We have a special handling for the filename tags. */
if (tag == tag_filename)
{
# ifdef HAVE_DIRCACHE
int dc;
# endif
idx = &ramcache_hdr->indices[fe->idx_id];
if (fe->tag_length >= (long)sizeof(buf)-1)
{
read(fd, buf, 10);
buf[10] = '\0';
logf("TAG:%s", buf);
logf("too long filename");
goto failure;
}
rc = read(fd, buf, fe->tag_length);
if (rc != fe->tag_length)
{
logf("read error #12");
goto failure;
}
/* Check if the entry has already been removed */
if (idx->flag & FLAG_DELETED)
continue;
/* This flag must not be used yet. */
if (idx->flag & FLAG_DIRCACHE)
{
logf("internal error!");
goto failure;
}
if (idx->tag_seek[tag] != pos)
{
logf("corrupt data structures!");
goto failure;
}
# ifdef HAVE_DIRCACHE
if (dircache_is_enabled())
{
dc = dircache_get_entry_id(buf);
if (dc < 0)
{
logf("Entry no longer valid.");
logf("-> %s", buf);
if (global_settings.tagcache_autoupdate)
delete_entry(fe->idx_id);
continue ;
}
idx->flag |= FLAG_DIRCACHE;
idx->tag_seek[tag_filename] = dc;
}
else
# endif
{
/* This will be very slow unless dircache is enabled
or target is flash based, but do it anyway for
consistency. */
/* Check if entry has been removed. */
if (global_settings.tagcache_autoupdate)
{
if (!file_exists(buf))
{
logf("Entry no longer valid.");
logf("-> %s", buf);
delete_entry(fe->idx_id);
continue;
}
}
}
continue ;
}
bytesleft -= sizeof(struct tagfile_entry) + fe->tag_length;
if (bytesleft < 0)
{
logf("too big tagcache #2");
logf("tl: %ld", fe->tag_length);
logf("bl: %ld", bytesleft);
goto failure;
}
p = fe->tag_data;
rc = read(fd, fe->tag_data, fe->tag_length);
p += rc;
if (rc != fe->tag_length)
{
logf("read error #13");
logf("rc=0x%04x", rc); // 0x431
logf("len=0x%04lx", fe->tag_length); // 0x4000
logf("pos=0x%04lx", lseek(fd, 0, SEEK_CUR)); // 0x433
logf("tag=0x%02x", tag); // 0x00
goto failure;
}
}
close(fd);
}
tc_stat.ramcache_used = tc_stat.ramcache_allocated - bytesleft;
logf("tagcache loaded into ram!");
move_lock--;
return true;
failure:
close(fd);
failure_nofd:
move_lock--;
return false;
}
#endif /* HAVE_TC_RAMCACHE */
static bool check_deleted_files(void)
{
int fd;
char buf[TAG_MAXLEN+32];
struct tagfile_entry tfe;
logf("reverse scan...");
snprintf(buf, sizeof buf, TAGCACHE_FILE_INDEX, tag_filename);
fd = open(buf, O_RDONLY);
if (fd < 0)
{
logf("%s open fail", buf);
return false;
}
lseek(fd, sizeof(struct tagcache_header), SEEK_SET);
while (ecread_tagfile_entry(fd, &tfe) == sizeof(struct tagfile_entry)
#ifndef __PCTOOL__
&& !check_event_queue()
#endif
)
{
if (tfe.tag_length >= (long)sizeof(buf)-1)
{
logf("too long tag");
close(fd);
return false;
}
if (read(fd, buf, tfe.tag_length) != tfe.tag_length)
{
logf("read error #14");
close(fd);
return false;
}
/* Check if the file has already deleted from the db. */
if (*buf == '\0')
continue;
/* Now check if the file exists. */
if (!file_exists(buf))
{
logf("Entry no longer valid.");
logf("-> %s / %ld", buf, tfe.tag_length);
delete_entry(tfe.idx_id);
}
}
close(fd);
logf("done");
return true;
}
/* Note that this function must not be inlined, otherwise the whole point
* of having the code in a separate function is lost.
*/
static void __attribute__ ((noinline)) check_ignore(const char *dirname,
int *ignore, int *unignore)
{
char newpath[MAX_PATH];
/* check for a database.ignore file */
snprintf(newpath, MAX_PATH, "%s/database.ignore", dirname);
*ignore = file_exists(newpath);
/* check for a database.unignore file */
snprintf(newpath, MAX_PATH, "%s/database.unignore", dirname);
*unignore = file_exists(newpath);
}
/* max roots on native. on application more can be added via malloc() */
#define MAX_STATIC_ROOTS 12
static struct search_roots_ll {
const char *path;
struct search_roots_ll * next;
} roots_ll[MAX_STATIC_ROOTS];
/* check if the path is already included in the search roots, by the
* means that the path itself or one of its parents folders is in the list */
static bool search_root_exists(const char *path)
{
struct search_roots_ll *this;
for(this = &roots_ll[0]; this; this = this->next)
{
size_t root_len = strlen(this->path);
/* check if the link target is inside of an existing search root
* don't add if target is inside, we'll scan it later */
if (!strncmp(this->path, path, root_len))
return true;
}
return false;
}
#ifdef APPLICATION
/*
* This adds a path to the search roots, possibly during traveling through
* the filesystem. It only adds if the path is not inside an already existing
* search root.
*
* Returns true if it added the path to the search roots
*
* Windows 2000 and greater supports symlinks, but they don't provide
* realpath() or readlink(), and symlinks are rarely used on them so
* ignore this for windows for now
**/
static bool add_search_root(const char *name)
{
(void)name;
#ifndef WIN32
struct search_roots_ll *this, *prev = NULL;
char target[MAX_PATH];
/* Okay, realpath() is almost completely broken on android
*
* It doesn't accept NULL for resolved_name to dynamically allocate
* the resulting path; and it assumes resolved_name to be PATH_MAX
* (actually MAXPATHLEN, but it's the same [as of 2.3]) long
* and blindly writes to the end if it
*
* therefore use sufficiently large static storage here
* Note that PATH_MAX != MAX_PATH
**/
static char abs_target[PATH_MAX];
ssize_t len;
len = readlink(name, target, sizeof(target)-1);
if (len < 0)
return false;
target[len] = '\0';
if (realpath(target, abs_target) == NULL)
return false;
if (search_root_exists(abs_target))
return false;
/* get the end of the list */
for(this = &roots_ll[0]; this; prev = this, this = this->next);
if (prev)
{
size_t len = strlen(abs_target) + 1; /* count \0 */
this = malloc(sizeof(struct search_roots_ll) + len );
if (!this || len > MAX_PATH)
{
logf("Error at adding a search root: %s", this ? "path too long":"OOM");
free(this);
prev->next = NULL;
return false;
}
this->path = ((char*)this) + sizeof(struct search_roots_ll);
strcpy((char*)this->path, abs_target); /* ok to cast const away here */
this->next = NULL;
prev->next = this;
logf("Added %s to the search roots\n", abs_target);
return true;
}
#endif
return false;
}
static int free_search_root_single(struct search_roots_ll * start)
{
if (start < &roots_ll[0] && start >= &roots_ll[MAX_STATIC_ROOTS])
{
free(start->next);
return sizeof(struct search_roots_ll);
}
return 0;
}
static int free_search_roots(struct search_roots_ll * start)
{
int ret = 0;
if (start->next)
{
ret += free_search_root_single(start->next);
}
return ret;
}
#else /* native, simulator */
#define add_search_root(a) do {} while(0)
#define free_search_roots(a) do {} while(0)
#endif
static bool check_dir(const char *dirname, int add_files)
{
DIR *dir;
int len;
int success = false;
int ignore, unignore;
dir = opendir(dirname);
if (!dir)
{
logf("tagcache: opendir(%s) failed", dirname);
return false;
}
/* check for a database.ignore and database.unignore */
check_ignore(dirname, &ignore, &unignore);
/* don't do anything if both ignore and unignore are there */
if (ignore != unignore)
add_files = unignore;
/* Recursively scan the dir. */
#ifdef __PCTOOL__
while (1)
#else
while (!check_event_queue())
#endif
{
struct dirent *entry = readdir(dir);
if (entry == NULL)
{
success = true;
break;
}
if (!strcmp((char *)entry->d_name, ".") ||
!strcmp((char *)entry->d_name, ".."))
continue;
struct dirinfo info = dir_get_info(dir, entry);
yield();
len = strlen(curpath);
/* don't add an extra / for curpath == / */
if (len <= 1) len = 0;
snprintf(&curpath[len], sizeof(curpath) - len, "/%s", entry->d_name);
processed_dir_count++;
if (info.attribute & ATTR_DIRECTORY)
#ifndef SIMULATOR
{ /* don't follow symlinks to dirs, but try to add it as a search root
* this makes able to avoid looping in recursive symlinks */
if (info.attribute & ATTR_LINK)
add_search_root(curpath);
else
check_dir(curpath, add_files);
}
#else
check_dir(curpath, add_files);
#endif
else if (add_files)
{
tc_stat.curentry = curpath;
/* Add a new entry to the temporary db file. */
add_tagcache(curpath, info.mtime
#if defined(HAVE_TC_RAMCACHE) && defined(HAVE_DIRCACHE)
, dir->internal_entry
#endif
);
/* Wait until current path for debug screen is read and unset. */
while (tc_stat.syncscreen && tc_stat.curentry != NULL)
yield();
tc_stat.curentry = NULL;
}
curpath[len] = '\0';
}
closedir(dir);
return success;
}
void tagcache_screensync_event(void)
{
tc_stat.curentry = NULL;
}
void tagcache_screensync_enable(bool state)
{
tc_stat.syncscreen = state;
}
#ifndef __PCTOOL__
/* this is called by the database tool to not pull in global_settings */
static
#endif
void do_tagcache_build(const char *path[])
{
struct tagcache_header header;
bool ret;
curpath[0] = '\0';
data_size = 0;
total_entry_count = 0;
processed_dir_count = 0;
#ifdef HAVE_DIRCACHE
while (dircache_is_initializing())
sleep(1);
#endif
logf("updating tagcache");
cachefd = open(TAGCACHE_FILE_TEMP, O_RDONLY);
if (cachefd >= 0)
{
logf("skipping, cache already waiting for commit");
close(cachefd);
return ;
}
cachefd = open(TAGCACHE_FILE_TEMP, O_RDWR | O_CREAT | O_TRUNC, 0666);
if (cachefd < 0)
{
logf("master file open failed: %s", TAGCACHE_FILE_TEMP);
return ;
}
filenametag_fd = open_tag_fd(&header, tag_filename, false);
cpu_boost(true);
logf("Scanning files...");
/* Scan for new files. */
memset(&header, 0, sizeof(struct tagcache_header));
write(cachefd, &header, sizeof(struct tagcache_header));
ret = true;
roots_ll[0].path = path[0];
roots_ll[0].next = NULL;
/* i is for the path vector, j for the roots_ll array
* path can be skipped , but root_ll entries can't */
for(int i = 1, j = 1; path[i] && j < MAX_STATIC_ROOTS; i++)
{
if (search_root_exists(path[i])) /* skip this path */
continue;
roots_ll[j].path = path[i];
roots_ll[j-1].next = &roots_ll[j];
j++;
}
struct search_roots_ll * this;
/* check_dir might add new roots */
for(this = &roots_ll[0]; this; this = this->next)
{
strcpy(curpath, this->path);
ret = ret && check_dir(this->path, true);
}
free_search_roots(&roots_ll[0]);
/* Write the header. */
header.magic = TAGCACHE_MAGIC;
header.datasize = data_size;
header.entry_count = total_entry_count;
lseek(cachefd, 0, SEEK_SET);
write(cachefd, &header, sizeof(struct tagcache_header));
close(cachefd);
if (filenametag_fd >= 0)
{
close(filenametag_fd);
filenametag_fd = -1;
}
if (!ret)
{
logf("Aborted.");
cpu_boost(false);
return ;
}
/* Commit changes to the database. */
#ifdef __PCTOOL__
allocate_tempbuf();
#endif
if (commit())
{
logf("tagcache built!");
}
#ifdef __PCTOOL__
free_tempbuf();
#endif
#ifdef HAVE_TC_RAMCACHE
if (ramcache_hdr)
{
/* Import runtime statistics if we just initialized the db. */
if (current_tcmh.serial == 0)
queue_post(&tagcache_queue, Q_IMPORT_CHANGELOG, 0);
}
#endif
cpu_boost(false);
}
#ifndef __PCTOOL__
void tagcache_build(void)
{
char *vect[MAX_STATIC_ROOTS + 1]; /* +1 to ensure NULL sentinel */
char str[sizeof(global_settings.tagcache_scan_paths)];
strlcpy(str, global_settings.tagcache_scan_paths, sizeof(str));
int res = split_string(str, ':', vect, MAX_STATIC_ROOTS);
vect[res] = NULL;
do_tagcache_build((const char**)vect);
}
#endif
#ifdef HAVE_TC_RAMCACHE
static void load_ramcache(void)
{
if (!ramcache_hdr)
return ;
cpu_boost(true);
/* At first we should load the cache (if exists). */
tc_stat.ramcache = load_tagcache();
if (!tc_stat.ramcache)
{
/* If loading failed, it must indicate some problem with the db
* so disable it entirely to prevent further issues. */
tc_stat.ready = false;
ramcache_hdr = NULL;
}
cpu_boost(false);
}
void tagcache_unload_ramcache(void)
{
tc_stat.ramcache = false;
/* Just to make sure there is no statefile present. */
// remove(TAGCACHE_STATEFILE);
}
#endif
#ifndef __PCTOOL__
static void tagcache_thread(void)
{
struct queue_event ev;
bool check_done = false;
/* If the previous cache build/update was interrupted, commit
* the changes first in foreground. */
cpu_boost(true);
allocate_tempbuf();
commit();
free_tempbuf();
#ifdef HAVE_TC_RAMCACHE
# ifdef HAVE_EEPROM_SETTINGS
if (firmware_settings.initialized && firmware_settings.disk_clean
&& global_settings.tagcache_ram)
{
check_done = tagcache_dumpload();
}
remove(TAGCACHE_STATEFILE);
# endif
/* Allocate space for the tagcache if found on disk. */
if (global_settings.tagcache_ram && !tc_stat.ramcache)
allocate_tagcache();
#endif
cpu_boost(false);
tc_stat.initialized = true;
/* Don't delay bootup with the header check but do it on background. */
if (!tc_stat.ready)
{
sleep(HZ);
tc_stat.ready = check_all_headers();
tc_stat.readyvalid = true;
}
while (1)
{
run_command_queue(false);
queue_wait_w_tmo(&tagcache_queue, &ev, HZ);
switch (ev.id)
{
case Q_IMPORT_CHANGELOG:
tagcache_import_changelog();
break;
case Q_REBUILD:
remove_files();
remove(TAGCACHE_FILE_TEMP);
tagcache_build();
break;
case Q_UPDATE:
tagcache_build();
#ifdef HAVE_TC_RAMCACHE
load_ramcache();
#endif
check_deleted_files();
break ;
case Q_START_SCAN:
check_done = false;
case SYS_TIMEOUT:
if (check_done || !tc_stat.ready)
break ;
#ifdef HAVE_TC_RAMCACHE
if (!tc_stat.ramcache && global_settings.tagcache_ram)
{
load_ramcache();
if (tc_stat.ramcache && global_settings.tagcache_autoupdate)
tagcache_build();
}
else
#endif
if (global_settings.tagcache_autoupdate)
{
tagcache_build();
/* This will be very slow unless dircache is enabled
or target is flash based, but do it anyway for
consistency. */
check_deleted_files();
}
logf("tagcache check done");
check_done = true;
break ;
case Q_STOP_SCAN:
break ;
case SYS_POWEROFF:
break ;
case SYS_USB_CONNECTED:
logf("USB: TagCache");
usb_acknowledge(SYS_USB_CONNECTED_ACK);
usb_wait_for_disconnect(&tagcache_queue);
break ;
}
}
}
bool tagcache_prepare_shutdown(void)
{
if (tagcache_get_commit_step() > 0)
return false;
tagcache_stop_scan();
while (read_lock || write_lock)
sleep(1);
return true;
}
void tagcache_shutdown(void)
{
/* Flush the command queue. */
run_command_queue(true);
#if defined(HAVE_EEPROM_SETTINGS) && defined(HAVE_TC_RAMCACHE)
if (tc_stat.ramcache)
tagcache_dumpsave();
#endif
}
static int get_progress(void)
{
int total_count = -1;
#ifdef HAVE_DIRCACHE
if (dircache_is_enabled())
{
total_count = dircache_get_entry_count();
}
else
#endif
#ifdef HAVE_TC_RAMCACHE
{
if (ramcache_hdr && tc_stat.ramcache)
total_count = current_tcmh.tch.entry_count;
}
#endif
if (total_count < 0)
return -1;
return processed_dir_count * 100 / total_count;
}
struct tagcache_stat* tagcache_get_stat(void)
{
tc_stat.progress = get_progress();
tc_stat.processed_entries = processed_dir_count;
return &tc_stat;
}
void tagcache_start_scan(void)
{
queue_post(&tagcache_queue, Q_START_SCAN, 0);
}
bool tagcache_update(void)
{
if (!tc_stat.ready)
return false;
queue_post(&tagcache_queue, Q_UPDATE, 0);
return false;
}
bool tagcache_rebuild()
{
queue_post(&tagcache_queue, Q_REBUILD, 0);
return false;
}
void tagcache_stop_scan(void)
{
queue_post(&tagcache_queue, Q_STOP_SCAN, 0);
}
#endif /* !__PCTOOL__ */
void tagcache_init(void)
{
memset(&tc_stat, 0, sizeof(struct tagcache_stat));
memset(&current_tcmh, 0, sizeof(struct master_header));
filenametag_fd = -1;
write_lock = read_lock = 0;
#ifndef __PCTOOL__
mutex_init(&command_queue_mutex);
queue_init(&tagcache_queue, true);
create_thread(tagcache_thread, tagcache_stack,
sizeof(tagcache_stack), 0, tagcache_thread_name
IF_PRIO(, PRIORITY_BACKGROUND)
IF_COP(, CPU));
#else
tc_stat.initialized = true;
allocate_tempbuf();
commit();
free_tempbuf();
tc_stat.ready = check_all_headers();
#endif
}
#ifdef __PCTOOL__
void tagcache_reverse_scan(void)
{
logf("Checking for deleted files");
check_deleted_files();
}
#endif
bool tagcache_is_initialized(void)
{
return tc_stat.initialized;
}
bool tagcache_is_fully_initialized(void)
{
return tc_stat.readyvalid;
}
bool tagcache_is_usable(void)
{
return tc_stat.initialized && tc_stat.ready;
}
int tagcache_get_commit_step(void)
{
return tc_stat.commit_step;
}
int tagcache_get_max_commit_step(void)
{
return (int)(SORTED_TAGS_COUNT)+1;
}
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