/* * JFFS2 -- Journalling Flash File System, Version 2. * * Copyright © 2001-2007 Red Hat, Inc. * Copyright © 2004-2010 David Woodhouse * * Created by David Woodhouse * * For licensing information, see the file 'LICENCE' in this directory. * */ #if !defined(__KERNEL__) && !defined(__ECOS) #error "The userspace support got too messy and was removed. Update your mkfs.jffs2" #endif #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include #include #include #include "nodelist.h" #include "compr.h" /* Plan: call deflate() with avail_in == *sourcelen, avail_out = *dstlen - 12 and flush == Z_FINISH. If it doesn't manage to finish, call it again with avail_in == 0 and avail_out set to the remaining 12 bytes for it to clean up. Q: Is 12 bytes sufficient? */ #define STREAM_END_SPACE 12 static DEFINE_MUTEX(deflate_mutex); static DEFINE_MUTEX(inflate_mutex); static z_stream inf_strm, def_strm; #ifdef __KERNEL__ /* Linux-only */ #include #include #include static int __init alloc_workspaces(void) { def_strm.workspace = vmalloc(zlib_deflate_workspacesize(MAX_WBITS, MAX_MEM_LEVEL)); if (!def_strm.workspace) return -ENOMEM; jffs2_dbg(1, "Allocated %d bytes for deflate workspace\n", zlib_deflate_workspacesize(MAX_WBITS, MAX_MEM_LEVEL)); inf_strm.workspace = vmalloc(zlib_inflate_workspacesize()); if (!inf_strm.workspace) { vfree(def_strm.workspace); return -ENOMEM; } jffs2_dbg(1, "Allocated %d bytes for inflate workspace\n", zlib_inflate_workspacesize()); return 0; } static void free_workspaces(void) { vfree(def_strm.workspace); vfree(inf_strm.workspace); } #else #define alloc_workspaces() (0) #define free_workspaces() do { } while(0) #endif /* __KERNEL__ */ static int jffs2_zlib_compress(unsigned char *data_in, unsigned char *cpage_out, uint32_t *sourcelen, uint32_t *dstlen) { int ret; if (*dstlen <= STREAM_END_SPACE) return -1; mutex_lock(&deflate_mutex); if (Z_OK != zlib_deflateInit(&def_strm, 3)) { pr_warn("deflateInit failed\n"); mutex_unlock(&deflate_mutex); return -1; } def_strm.next_in = data_in; def_strm.total_in = 0; def_strm.next_out = cpage_out; def_strm.total_out = 0; while (def_strm.total_out < *dstlen - STREAM_END_SPACE && def_strm.total_in < *sourcelen) { def_strm.avail_out = *dstlen - (def_strm.total_out + STREAM_END_SPACE); def_strm.avail_in = min_t(unsigned long, (*sourcelen-def_strm.total_in), def_strm.avail_out); jffs2_dbg(1, "calling deflate with avail_in %ld, avail_out %ld\n", def_strm.avail_in, def_strm.avail_out); ret = zlib_deflate(&def_strm, Z_PARTIAL_FLUSH); jffs2_dbg(1, "deflate returned with avail_in %ld, avail_out %ld, total_in %ld, total_out %ld\n", def_strm.avail_in, def_strm.avail_out, def_strm.total_in, def_strm.total_out); if (ret != Z_OK) { jffs2_dbg(1, "deflate in loop returned %d\n", ret); zlib_deflateEnd(&def_strm); mutex_unlock(&deflate_mutex); return -1; } } def_strm.avail_out += STREAM_END_SPACE; def_strm.avail_in = 0; ret = zlib_deflate(&def_strm, Z_FINISH); zlib_deflateEnd(&def_strm); if (ret != Z_STREAM_END) { jffs2_dbg(1, "final deflate returned %d\n", ret); ret = -1; goto out; } if (def_strm.total_out >= def_strm.total_in) { jffs2_dbg(1, "zlib compressed %ld bytes into %ld; failing\n", def_strm.total_in, def_strm.total_out); ret = -1; goto out; } jffs2_dbg(1, "zlib compressed %ld bytes into %ld\n", def_strm.total_in, def_strm.total_out); *dstlen = def_strm.total_out; *sourcelen = def_strm.total_in; ret = 0; out: mutex_unlock(&deflate_mutex); return ret; } static int jffs2_zlib_decompress(unsigned char *data_in, unsigned char *cpage_out, uint32_t srclen, uint32_t destlen) { int ret; int wbits = MAX_WBITS; mutex_lock(&inflate_mutex); inf_strm.next_in = data_in; inf_strm.avail_in = srclen; inf_strm.total_in = 0; inf_strm.next_out = cpage_out; inf_strm.avail_out = destlen; inf_strm.total_out = 0; /* If it's deflate, and it's got no preset dictionary, then we can tell zlib to skip the adler32 check. */ if (srclen > 2 && !(data_in[1] & PRESET_DICT) && ((data_in[0] & 0x0f) == Z_DEFLATED) && !(((data_in[0]<<8) + data_in[1]) % 31)) { jffs2_dbg(2, "inflate skipping adler32\n"); wbits = -((data_in[0] >> 4) + 8); inf_strm.next_in += 2; inf_strm.avail_in -= 2; } else { /* Let this remain D1 for now -- it should never happen */ jffs2_dbg(1, "inflate not skipping adler32\n"); } if (Z_OK != zlib_inflateInit2(&inf_strm, wbits)) { pr_warn("inflateInit failed\n"); mutex_unlock(&inflate_mutex); return 1; } while((ret = zlib_inflate(&inf_strm, Z_FINISH)) == Z_OK) ; if (ret != Z_STREAM_END) { pr_notice("inflate returned %d\n", ret); } zlib_inflateEnd(&inf_strm); mutex_unlock(&inflate_mutex); return 0; } static struct jffs2_compressor jffs2_zlib_comp = { .priority = JFFS2_ZLIB_PRIORITY, .name = "zlib", .compr = JFFS2_COMPR_ZLIB, .compress = &jffs2_zlib_compress, .decompress = &jffs2_zlib_decompress, #ifdef JFFS2_ZLIB_DISABLED .disabled = 1, #else .disabled = 0, #endif }; int __init jffs2_zlib_init(void) { int ret; ret = alloc_workspaces(); if (ret) return ret; ret = jffs2_register_compressor(&jffs2_zlib_comp); if (ret) free_workspaces(); return ret; } void jffs2_zlib_exit(void) { jffs2_unregister_compressor(&jffs2_zlib_comp); free_workspaces(); } ='ls-blob h' href='/cgit.cgi/linux/net-next.git/tree/include/sound/aess.h?id=de04b6a35887b742dccbc17e6663e4749aaa7542'>aess.h1668logplain -rw-r--r--ak4113.h11112logplain -rw-r--r--ak4114.h10424logplain -rw-r--r--ak4117.h9193logplain -rw-r--r--ak4531_codec.h3173logplain -rw-r--r--ak4641.h622logplain -rw-r--r--ak4xxx-adda.h3416logplain -rw-r--r--alc5623.h497logplain -rw-r--r--asequencer.h3670logplain -rw-r--r--asound.h1285logplain -rw-r--r--asoundef.h17098logplain -rw-r--r--atmel-abdac.h639logplain -rw-r--r--atmel-ac97c.h1342logplain -rw-r--r--compress_driver.h6772logplain -rw-r--r--control.h8704logplain -rw-r--r--core.h14380logplain -rw-r--r--cs35l33.h1034logplain -rw-r--r--cs35l34.h887logplain -rw-r--r--cs4231-regs.h8480logplain -rw-r--r--cs4271.h1417logplain -rw-r--r--cs42l52.h738logplain -rw-r--r--cs42l56.h1192logplain -rw-r--r--cs42l73.h507logplain -rw-r--r--cs8403.h8833logplain -rw-r--r--cs8427.h10649logplain -rw-r--r--da7213.h1178logplain -rw-r--r--da7218.h2681logplain -rw-r--r--da7219-aad.h2476logplain -rw-r--r--da7219.h1064logplain -rw-r--r--da9055.h914logplain -rw-r--r--designware_i2s.h2249logplain -rw-r--r--dmaengine_pcm.h6157logplain -rw-r--r--emu10k1.h91396logplain -rw-r--r--emu10k1_synth.h1382logplain -rw-r--r--emu8000.h4109logplain -rw-r--r--emu8000_reg.h10459logplain -rw-r--r--emux_legacy.h5503logplain -rw-r--r--emux_synth.h7649logplain -rw-r--r--es1688.h3618logplain -rw-r--r--gus.h20691logplain -rw-r--r--hda_chmap.h2621logplain -rw-r--r--hda_hwdep.h1412logplain -rw-r--r--hda_i915.h1645logplain -rw-r--r--hda_register.h9475logplain -rw-r--r--hda_regmap.h6714logplain -rw-r--r--hda_verbs.h17130logplain -rw-r--r--hdaudio.h18455logplain -rw-r--r--hdaudio_ext.h7119logplain -rw-r--r--hdmi-codec.h2290logplain -rw-r--r--hwdep.h2624logplain -rw-r--r--i2c.h3555logplain -rw-r--r--info.h7584logplain