globals.c

/*
    FuseCompress
    Copyright (C) 2005 Milan Svoboda <milan.svoboda@centrum.cz>
    (C) 2009, 2011 Ulrich Hecht <uli@suse.de>
*/

#include "config.h"

#include <pthread.h>
#include <sys/types.h>
#include <assert.h>

#include "structs.h"
#include "compress.h"

pthread_t           pt_comp;	/* compress thread */
pthread_mutexattr_t locktype;

// Files smaller than this are not compressed
//
int min_filesize_background;

int read_only;	/* set if mounted read-only to avoid temporary decompression of files */
int cache_decompressed_data;
int decomp_cache_size;
int max_decomp_cache_size;

int dedup_enabled;
int dedup_redup;

compressor_t *compressor_default = NULL;

// Table of supported compressors. This is array and
// it is vital to sort modules according it's type. E.g. module_null
// has type 0x0 or module_gzip has type 0x02.
//
compressor_t *compressors[5] = {
	&module_null,
#ifdef HAVE_BZIP2
	&module_bz2,
#else
	NULL,
#endif
#ifdef HAVE_ZLIB
	&module_gzip,
#else
	NULL,
#endif
#ifdef HAVE_LZO2
	&module_lzo,
#else
	NULL,
#endif
#ifdef HAVE_LZMA
	&module_lzma,
#else
	NULL,
#endif
};

char *incompressible[] = {
    /* audio */
    ".mp3", ".ogg", ".wma" /* check */, ".m4a", ".mp2",
    /* media */
    ".avi", ".mov", ".mpg", ".mpeg", ".mp4", ".m4v", ".mkv", ".asf" /* check */, ".flv",
    ".3gp" /* check */, ".vob" /* check */, ".swf", ".ogm",
    /* archives */
    ".gz", ".bz2", ".zip", ".tgz", ".lzo" /* check */, ".lzma", ".rar", ".ace", ".7z",
    ".lha", ".lzh" /* check */, ".chm", ".lrz", ".xz", ".odt" /* check */, ".epub", ".xpi" /* check */,
    ".lzx",
    /* images, documents */
    /* (NOT incompressible: .pdf, .gif) */
    ".jpg", ".png", ".djvu" /* check */, ".cbr", ".cbz",
    /* software packages */
    /* (NOT incompressible: .jar (often not or weakly compressed)) */
    ".rpm", ".deb", ".cab",
    /* compressed CD images */
    ".cdz" /* check */, ".cso",
    /* other */
    ".torrent",
    /* on probation */
    ".pack",	/* git .pack files don't compress, but there may be other
                   kinds of files with this extension. */
    ".wmv",	/* Intuitively, you'd say this won't compress at all, but I
                   have a screencast file here that compresses down to 30%
                   the original size with LZMA. */
    NULL
};

char **user_incompressible = NULL;
char **user_exclude_paths = NULL;

int root_fs;	/* set if you do not want to compress shared objects or binaries in mmapped_dirs[] */
char *mmapped_dirs[] = {
    "bin/", "sbin/", "usr/bin/", "usr/sbin/", NULL
};

size_t dont_compress_beyond; /* maximum size of files to compress in the bg compress thread */

database_t database = {
	.head = LIST_HEAD_INIT(database.head),
	.lock = PTHREAD_MUTEX_INITIALIZER,
	.cond = PTHREAD_COND_INITIALIZER,		// Not used
	.entries = 0,
};

database_t comp_database = {
	.head = LIST_HEAD_INIT(comp_database.head),
	.lock = PTHREAD_MUTEX_INITIALIZER,
	.cond = PTHREAD_COND_INITIALIZER,		// When new item is added to the list
	.entries = 0,
};

#ifdef WITH_DEDUP
dedup_hash_t dedup_database = {
        /* .head_filename[] and .head_md5[] cannot be initialized statically */
	.lock = PTHREAD_MUTEX_INITIALIZER,
	.cond = PTHREAD_COND_INITIALIZER,		// When new item is added to the list
	.entries = 0,
};
#endif

#ifdef DEBUG
int _debug_on = 1;
#endif