^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * This file is part of UBIFS.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2006-2008 Nokia Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2006, 2007 University of Szeged, Hungary
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Authors: Adrian Hunter
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Artem Bityutskiy (Битюцкий Артём)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Zoltan Sogor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * This file provides a single place to access to compression and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * decompression.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/crypto.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include "ubifs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) /* Fake description object for the "none" compressor */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) static struct ubifs_compressor none_compr = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) .compr_type = UBIFS_COMPR_NONE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) .name = "none",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) .capi_name = "",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #ifdef CONFIG_UBIFS_FS_LZO
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static DEFINE_MUTEX(lzo_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static struct ubifs_compressor lzo_compr = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) .compr_type = UBIFS_COMPR_LZO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) .comp_mutex = &lzo_mutex,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) .name = "lzo",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) .capi_name = "lzo",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static struct ubifs_compressor lzo_compr = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) .compr_type = UBIFS_COMPR_LZO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) .name = "lzo",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #ifdef CONFIG_UBIFS_FS_ZLIB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static DEFINE_MUTEX(deflate_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) static DEFINE_MUTEX(inflate_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) static struct ubifs_compressor zlib_compr = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) .compr_type = UBIFS_COMPR_ZLIB,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) .comp_mutex = &deflate_mutex,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) .decomp_mutex = &inflate_mutex,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) .name = "zlib",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) .capi_name = "deflate",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) static struct ubifs_compressor zlib_compr = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) .compr_type = UBIFS_COMPR_ZLIB,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) .name = "zlib",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #ifdef CONFIG_UBIFS_FS_ZSTD
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) static DEFINE_MUTEX(zstd_enc_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) static DEFINE_MUTEX(zstd_dec_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) static struct ubifs_compressor zstd_compr = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) .compr_type = UBIFS_COMPR_ZSTD,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) .comp_mutex = &zstd_enc_mutex,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) .decomp_mutex = &zstd_dec_mutex,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) .name = "zstd",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) .capi_name = "zstd",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) static struct ubifs_compressor zstd_compr = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) .compr_type = UBIFS_COMPR_ZSTD,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) .name = "zstd",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) /* All UBIFS compressors */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) struct ubifs_compressor *ubifs_compressors[UBIFS_COMPR_TYPES_CNT];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) * ubifs_compress - compress data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) * @in_buf: data to compress
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) * @in_len: length of the data to compress
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) * @out_buf: output buffer where compressed data should be stored
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) * @out_len: output buffer length is returned here
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) * @compr_type: type of compression to use on enter, actually used compression
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) * type on exit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) * This function compresses input buffer @in_buf of length @in_len and stores
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) * the result in the output buffer @out_buf and the resulting length in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) * @out_len. If the input buffer does not compress, it is just copied to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) * @out_buf. The same happens if @compr_type is %UBIFS_COMPR_NONE or if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) * compression error occurred.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) * Note, if the input buffer was not compressed, it is copied to the output
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) * buffer and %UBIFS_COMPR_NONE is returned in @compr_type.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) void ubifs_compress(const struct ubifs_info *c, const void *in_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) int in_len, void *out_buf, int *out_len, int *compr_type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) struct ubifs_compressor *compr = ubifs_compressors[*compr_type];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (*compr_type == UBIFS_COMPR_NONE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) goto no_compr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) /* If the input data is small, do not even try to compress it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) if (in_len < UBIFS_MIN_COMPR_LEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) goto no_compr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) if (compr->comp_mutex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) mutex_lock(compr->comp_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) err = crypto_comp_compress(compr->cc, in_buf, in_len, out_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) (unsigned int *)out_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (compr->comp_mutex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) mutex_unlock(compr->comp_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) if (unlikely(err)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) ubifs_warn(c, "cannot compress %d bytes, compressor %s, error %d, leave data uncompressed",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) in_len, compr->name, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) goto no_compr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) * If the data compressed only slightly, it is better to leave it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) * uncompressed to improve read speed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) if (in_len - *out_len < UBIFS_MIN_COMPRESS_DIFF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) goto no_compr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) no_compr:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) memcpy(out_buf, in_buf, in_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) *out_len = in_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) *compr_type = UBIFS_COMPR_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) * ubifs_decompress - decompress data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) * @in_buf: data to decompress
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) * @in_len: length of the data to decompress
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) * @out_buf: output buffer where decompressed data should
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) * @out_len: output length is returned here
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) * @compr_type: type of compression
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) * This function decompresses data from buffer @in_buf into buffer @out_buf.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) * The length of the uncompressed data is returned in @out_len. This functions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) * returns %0 on success or a negative error code on failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) int ubifs_decompress(const struct ubifs_info *c, const void *in_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) int in_len, void *out_buf, int *out_len, int compr_type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) struct ubifs_compressor *compr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) if (unlikely(compr_type < 0 || compr_type >= UBIFS_COMPR_TYPES_CNT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) ubifs_err(c, "invalid compression type %d", compr_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) compr = ubifs_compressors[compr_type];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) if (unlikely(!compr->capi_name)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) ubifs_err(c, "%s compression is not compiled in", compr->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) if (compr_type == UBIFS_COMPR_NONE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) memcpy(out_buf, in_buf, in_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) *out_len = in_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) if (compr->decomp_mutex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) mutex_lock(compr->decomp_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) err = crypto_comp_decompress(compr->cc, in_buf, in_len, out_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) (unsigned int *)out_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) if (compr->decomp_mutex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) mutex_unlock(compr->decomp_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) ubifs_err(c, "cannot decompress %d bytes, compressor %s, error %d",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) in_len, compr->name, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) * compr_init - initialize a compressor.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) * @compr: compressor description object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) * This function initializes the requested compressor and returns zero in case
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) * of success or a negative error code in case of failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) static int __init compr_init(struct ubifs_compressor *compr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) if (compr->capi_name) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) compr->cc = crypto_alloc_comp(compr->capi_name, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) if (IS_ERR(compr->cc)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) pr_err("UBIFS error (pid %d): cannot initialize compressor %s, error %ld",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) current->pid, compr->name, PTR_ERR(compr->cc));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) return PTR_ERR(compr->cc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) ubifs_compressors[compr->compr_type] = compr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) * compr_exit - de-initialize a compressor.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) * @compr: compressor description object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) static void compr_exit(struct ubifs_compressor *compr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) if (compr->capi_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) crypto_free_comp(compr->cc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) * ubifs_compressors_init - initialize UBIFS compressors.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) * This function initializes the compressor which were compiled in. Returns
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) * zero in case of success and a negative error code in case of failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) int __init ubifs_compressors_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) err = compr_init(&lzo_compr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) err = compr_init(&zstd_compr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) goto out_lzo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) err = compr_init(&zlib_compr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) goto out_zstd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) ubifs_compressors[UBIFS_COMPR_NONE] = &none_compr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) out_zstd:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) compr_exit(&zstd_compr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) out_lzo:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) compr_exit(&lzo_compr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) * ubifs_compressors_exit - de-initialize UBIFS compressors.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) void ubifs_compressors_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) compr_exit(&lzo_compr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) compr_exit(&zlib_compr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) compr_exit(&zstd_compr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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