diff options
-rw-r--r-- | block/dmg.c | 56 | ||||
-rwxr-xr-x | configure | 31 |
2 files changed, 84 insertions, 3 deletions
diff --git a/block/dmg.c b/block/dmg.c index 93b597f21e..67d4e2bb42 100644 --- a/block/dmg.c +++ b/block/dmg.c @@ -26,6 +26,9 @@ #include "qemu/bswap.h" #include "qemu/module.h" #include <zlib.h> +#ifdef CONFIG_BZIP2 +#include <bzlib.h> +#endif #include <glib.h> enum { @@ -56,6 +59,9 @@ typedef struct BDRVDMGState { uint8_t *compressed_chunk; uint8_t *uncompressed_chunk; z_stream zstream; +#ifdef CONFIG_BZIP2 + bz_stream bzstream; +#endif } BDRVDMGState; static int dmg_probe(const uint8_t *buf, int buf_size, const char *filename) @@ -123,6 +129,7 @@ static void update_max_chunk_size(BDRVDMGState *s, uint32_t chunk, switch (s->types[chunk]) { case 0x80000005: /* zlib compressed */ + case 0x80000006: /* bzip2 compressed */ compressed_size = s->lengths[chunk]; uncompressed_sectors = s->sectorcounts[chunk]; break; @@ -187,6 +194,21 @@ typedef struct DmgHeaderState { uint32_t max_sectors_per_chunk; } DmgHeaderState; +static bool dmg_is_valid_block_type(uint32_t entry_type) +{ + switch (entry_type) { + case 0x00000001: /* uncompressed */ + case 0x00000002: /* zeroes */ + case 0x80000005: /* zlib */ +#ifdef CONFIG_BZIP2 + case 0x80000006: /* bzip2 */ +#endif + return true; + default: + return false; + } +} + static int dmg_read_mish_block(BDRVDMGState *s, DmgHeaderState *ds, uint8_t *buffer, uint32_t count) { @@ -218,8 +240,7 @@ static int dmg_read_mish_block(BDRVDMGState *s, DmgHeaderState *ds, for (i = s->n_chunks; i < s->n_chunks + chunk_count; i++) { s->types[i] = buff_read_uint32(buffer, offset); offset += 4; - if (s->types[i] != 0x80000005 && s->types[i] != 1 && - s->types[i] != 2) { + if (!dmg_is_valid_block_type(s->types[i])) { if (s->types[i] == 0xffffffff && i > 0) { ds->last_in_offset = s->offsets[i - 1] + s->lengths[i - 1]; ds->last_out_offset = s->sectors[i - 1] + @@ -534,13 +555,14 @@ static inline int dmg_read_chunk(BlockDriverState *bs, uint64_t sector_num) if (!is_sector_in_chunk(s, s->current_chunk, sector_num)) { int ret; uint32_t chunk = search_chunk(s, sector_num); + uint64_t total_out; if (chunk >= s->n_chunks) { return -1; } s->current_chunk = s->n_chunks; - switch (s->types[chunk]) { + switch (s->types[chunk]) { /* block entry type */ case 0x80000005: { /* zlib compressed */ /* we need to buffer, because only the chunk as whole can be * inflated. */ @@ -564,6 +586,34 @@ static inline int dmg_read_chunk(BlockDriverState *bs, uint64_t sector_num) return -1; } break; } +#ifdef CONFIG_BZIP2 + case 0x80000006: /* bzip2 compressed */ + /* we need to buffer, because only the chunk as whole can be + * inflated. */ + ret = bdrv_pread(bs->file, s->offsets[chunk], + s->compressed_chunk, s->lengths[chunk]); + if (ret != s->lengths[chunk]) { + return -1; + } + + ret = BZ2_bzDecompressInit(&s->bzstream, 0, 0); + if (ret != BZ_OK) { + return -1; + } + s->bzstream.next_in = (char *)s->compressed_chunk; + s->bzstream.avail_in = (unsigned int) s->lengths[chunk]; + s->bzstream.next_out = (char *)s->uncompressed_chunk; + s->bzstream.avail_out = (unsigned int) 512 * s->sectorcounts[chunk]; + ret = BZ2_bzDecompress(&s->bzstream); + total_out = ((uint64_t)s->bzstream.total_out_hi32 << 32) + + s->bzstream.total_out_lo32; + BZ2_bzDecompressEnd(&s->bzstream); + if (ret != BZ_STREAM_END || + total_out != 512 * s->sectorcounts[chunk]) { + return -1; + } + break; +#endif /* CONFIG_BZIP2 */ case 1: /* copy */ ret = bdrv_pread(bs->file, s->offsets[chunk], s->uncompressed_chunk, s->lengths[chunk]); @@ -313,6 +313,7 @@ glx="" zlib="yes" lzo="" snappy="" +bzip2="" guest_agent="" guest_agent_with_vss="no" vss_win32_sdk="" @@ -1060,6 +1061,10 @@ for opt do ;; --enable-snappy) snappy="yes" ;; + --disable-bzip2) bzip2="no" + ;; + --enable-bzip2) bzip2="yes" + ;; --enable-guest-agent) guest_agent="yes" ;; --disable-guest-agent) guest_agent="no" @@ -1374,6 +1379,8 @@ Advanced options (experts only): --enable-usb-redir enable usb network redirection support --enable-lzo enable the support of lzo compression library --enable-snappy enable the support of snappy compression library + --enable-bzip2 enable the support of bzip2 compression library (for + reading bzip2-compressed dmg images) --disable-guest-agent disable building of the QEMU Guest Agent --enable-guest-agent enable building of the QEMU Guest Agent --with-vss-sdk=SDK-path enable Windows VSS support in QEMU Guest Agent @@ -1820,6 +1827,25 @@ EOF fi ########################################## +# bzip2 check + +if test "$bzip2" != "no" ; then + cat > $TMPC << EOF +#include <bzlib.h> +int main(void) { BZ2_bzlibVersion(); return 0; } +EOF + if compile_prog "" "-lbz2" ; then + libs_softmmu="$libs_softmmu -lbz2" + bzip2="yes" + else + if test "$bzip2" = "yes"; then + feature_not_found "libbzip2" "Install libbzip2 devel" + fi + bzip2="no" + fi +fi + +########################################## # libseccomp check if test "$seccomp" != "no" ; then @@ -4340,6 +4366,7 @@ echo "vhdx $vhdx" echo "Quorum $quorum" echo "lzo support $lzo" echo "snappy support $snappy" +echo "bzip2 support $bzip2" echo "NUMA host support $numa" if test "$sdl_too_old" = "yes"; then @@ -4695,6 +4722,10 @@ if test "$snappy" = "yes" ; then echo "CONFIG_SNAPPY=y" >> $config_host_mak fi +if test "$bzip2" = "yes" ; then + echo "CONFIG_BZIP2=y" >> $config_host_mak +fi + if test "$libiscsi" = "yes" ; then echo "CONFIG_LIBISCSI=m" >> $config_host_mak echo "LIBISCSI_CFLAGS=$libiscsi_cflags" >> $config_host_mak |