X-Git-Url: http://git.maemo.org/git/?a=blobdiff_plain;f=qemu-img.c;h=3edf25a8f0b88565f5e70b11d974e245b3dec008;hb=fd93a79999c728dd1f30bb2e726ce12bdf704e6d;hp=31f877606d4f80c0a990b8937c4e7001029c1181;hpb=b8076a748d52db5f5258c29fe342b8593a0b9914;p=qemu diff --git a/qemu-img.c b/qemu-img.c index 31f8776..3edf25a 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -1,8 +1,8 @@ /* - * create a COW disk image - * - * Copyright (c) 2003 Fabrice Bellard - * + * QEMU disk image utility + * + * Copyright (c) 2003-2008 Fabrice Bellard + * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights @@ -21,95 +21,20 @@ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ -#include "vl.h" - -void *get_mmap_addr(unsigned long size) -{ - return NULL; -} - -void qemu_free(void *ptr) -{ - free(ptr); -} - -void *qemu_malloc(size_t size) -{ - return malloc(size); -} - -void *qemu_mallocz(size_t size) -{ - void *ptr; - ptr = qemu_malloc(size); - if (!ptr) - return NULL; - memset(ptr, 0, size); - return ptr; -} - -char *qemu_strdup(const char *str) -{ - char *ptr; - ptr = qemu_malloc(strlen(str) + 1); - if (!ptr) - return NULL; - strcpy(ptr, str); - return ptr; -} +#include "qemu-common.h" +#include "qemu-option.h" +#include "osdep.h" +#include "block_int.h" +#include -void pstrcpy(char *buf, int buf_size, const char *str) -{ - int c; - char *q = buf; - - if (buf_size <= 0) - return; - - for(;;) { - c = *str++; - if (c == 0 || q >= buf + buf_size - 1) - break; - *q++ = c; - } - *q = '\0'; -} - -/* strcat and truncate. */ -char *pstrcat(char *buf, int buf_size, const char *s) -{ - int len; - len = strlen(buf); - if (len < buf_size) - pstrcpy(buf + len, buf_size - len, s); - return buf; -} - -int strstart(const char *str, const char *val, const char **ptr) -{ - const char *p, *q; - p = str; - q = val; - while (*q != '\0') { - if (*p != *q) - return 0; - p++; - q++; - } - if (ptr) - *ptr = p; - return 1; -} +#ifdef _WIN32 +#include +#endif -void term_printf(const char *fmt, ...) -{ - va_list ap; - va_start(ap, fmt); - vprintf(fmt, ap); - va_end(ap); -} +/* Default to cache=writeback as data integrity is not important for qemu-tcg. */ +#define BRDV_O_FLAGS BDRV_O_CACHE_WB -void __attribute__((noreturn)) error(const char *fmt, ...) +static void QEMU_NORETURN error(const char *fmt, ...) { va_list ap; va_start(ap, fmt); @@ -125,66 +50,53 @@ static void format_print(void *opaque, const char *name) printf(" %s", name); } -void help(void) +/* Please keep in synch with qemu-img.texi */ +static void help(void) { - printf("qemu-img version " QEMU_VERSION ", Copyright (c) 2004 Fabrice Bellard\n" + printf("qemu-img version " QEMU_VERSION ", Copyright (c) 2004-2008 Fabrice Bellard\n" "usage: qemu-img command [command options]\n" "QEMU disk image utility\n" "\n" "Command syntax:\n" - " create [-e] [-b base_image] [-f fmt] filename [size]\n" + " check [-f fmt] filename\n" + " create [-e] [-6] [-F fmt] [-b base_image] [-f fmt] filename [size]\n" " commit [-f fmt] filename\n" - " convert [-c] [-e] [-f fmt] filename [-O output_fmt] output_filename\n" + " convert [-c] [-e] [-6] [-f fmt] [-O output_fmt] [-B output_base_image] filename [filename2 [...]] output_filename\n" " info [-f fmt] filename\n" + " snapshot [-l | -a snapshot | -c snapshot | -d snapshot] filename\n" "\n" "Command parameters:\n" " 'filename' is a disk image filename\n" " 'base_image' is the read-only disk image which is used as base for a copy on\n" " write image; the copy on write image only stores the modified data\n" + " 'output_base_image' forces the output image to be created as a copy on write\n" + " image of the specified base image; 'output_base_image' should have the same\n" + " content as the input's base image, however the path, image format, etc may\n" + " differ\n" " 'fmt' is the disk image format. It is guessed automatically in most cases\n" - " 'size' is the disk image size in kilobytes. Optional suffixes 'M' (megabyte)\n" - " and 'G' (gigabyte) are supported\n" + " 'size' is the disk image size in kilobytes. Optional suffixes\n" + " 'M' (megabyte, 1024 * 1024) and 'G' (gigabyte, 1024 * 1024 * 1024) are\n" + " supported any 'k' or 'K' is ignored\n" " 'output_filename' is the destination disk image filename\n" " 'output_fmt' is the destination format\n" " '-c' indicates that target image must be compressed (qcow format only)\n" " '-e' indicates that the target image must be encrypted (qcow format only)\n" + " '-6' indicates that the target image must use compatibility level 6 (vmdk format only)\n" + " '-h' with or without a command shows this help and lists the supported formats\n" + "\n" + "Parameters to snapshot subcommand:\n" + " 'snapshot' is the name of the snapshot to create, apply or delete\n" + " '-a' applies a snapshot (revert disk to saved state)\n" + " '-c' creates a snapshot\n" + " '-d' deletes a snapshot\n" + " '-l' lists all snapshots in the given image\n" ); - printf("\nSupported format:"); + printf("\nSupported formats:"); bdrv_iterate_format(format_print, NULL); printf("\n"); exit(1); } - -#define NB_SUFFIXES 4 - -static void get_human_readable_size(char *buf, int buf_size, int64_t size) -{ - char suffixes[NB_SUFFIXES] = "KMGT"; - int64_t base; - int i; - - if (size <= 999) { - snprintf(buf, buf_size, "%lld", (long long) size); - } else { - base = 1024; - for(i = 0; i < NB_SUFFIXES; i++) { - if (size < (10 * base)) { - snprintf(buf, buf_size, "%0.1f%c", - (double)size / base, - suffixes[i]); - break; - } else if (size < (1000 * base) || i == (NB_SUFFIXES - 1)) { - snprintf(buf, buf_size, "%lld%c", - (long long) ((size + (base >> 1)) / base), - suffixes[i]); - break; - } - base = base * 1024; - } - } -} - #if defined(WIN32) /* XXX: put correct support for win32 */ static int read_password(char *buf, int buf_size) @@ -230,13 +142,13 @@ static void term_init(void) tty.c_cflag |= CS8; tty.c_cc[VMIN] = 1; tty.c_cc[VTIME] = 0; - + tcsetattr (0, TCSANOW, &tty); atexit(term_exit); } -int read_password(char *buf, int buf_size) +static int read_password(char *buf, int buf_size) { uint8_t ch; int i, ret; @@ -290,7 +202,7 @@ static BlockDriverState *bdrv_new_open(const char *filename, } else { drv = NULL; } - if (bdrv_open2(bs, filename, 0, drv) < 0) { + if (bdrv_open2(bs, filename, BRDV_O_FLAGS, drv) < 0) { error("Could not open '%s'", filename); } if (bdrv_is_encrypted(bs)) { @@ -303,25 +215,55 @@ static BlockDriverState *bdrv_new_open(const char *filename, return bs; } +static void add_old_style_options(const char *fmt, QEMUOptionParameter *list, + int flags, const char *base_filename, const char *base_fmt) +{ + if (flags & BLOCK_FLAG_ENCRYPT) { + if (set_option_parameter(list, BLOCK_OPT_ENCRYPT, "on")) { + error("Encryption not supported for file format '%s'", fmt); + } + } + if (flags & BLOCK_FLAG_COMPAT6) { + if (set_option_parameter(list, BLOCK_OPT_COMPAT6, "on")) { + error("VMDK version 6 not supported for file format '%s'", fmt); + } + } + + if (base_filename) { + if (set_option_parameter(list, BLOCK_OPT_BACKING_FILE, base_filename)) { + error("Backing file not supported for file format '%s'", fmt); + } + } + if (base_fmt) { + if (set_option_parameter(list, BLOCK_OPT_BACKING_FMT, base_fmt)) { + error("Backing file format not supported for file format '%s'", fmt); + } + } +} + static int img_create(int argc, char **argv) { - int c, ret, encrypted; + int c, ret, flags; const char *fmt = "raw"; + const char *base_fmt = NULL; const char *filename; const char *base_filename = NULL; - int64_t size; - const char *p; BlockDriver *drv; - - encrypted = 0; + QEMUOptionParameter *param = NULL; + char *options = NULL; + + flags = 0; for(;;) { - c = getopt(argc, argv, "b:f:he"); + c = getopt(argc, argv, "F:b:f:he6o:"); if (c == -1) break; switch(c) { case 'h': help(); break; + case 'F': + base_fmt = optarg; + break; case 'b': base_filename = optarg; break; @@ -329,51 +271,90 @@ static int img_create(int argc, char **argv) fmt = optarg; break; case 'e': - encrypted = 1; + flags |= BLOCK_FLAG_ENCRYPT; + break; + case '6': + flags |= BLOCK_FLAG_COMPAT6; + break; + case 'o': + options = optarg; break; } } - if (optind >= argc) + if (optind >= argc) help(); filename = argv[optind++]; - size = 0; - if (base_filename) { - BlockDriverState *bs; - bs = bdrv_new_open(base_filename, NULL); - bdrv_get_geometry(bs, &size); - size *= 512; - bdrv_delete(bs); - } else { - if (optind >= argc) - help(); - p = argv[optind]; - size = strtoul(p, (char **)&p, 0); - if (*p == 'M') { - size *= 1024 * 1024; - } else if (*p == 'G') { - size *= 1024 * 1024 * 1024; - } else if (*p == 'k' || *p == 'K' || *p == '\0') { - size *= 1024; - } else { - help(); - } - } + + /* Find driver and parse its options */ drv = bdrv_find_format(fmt); if (!drv) error("Unknown file format '%s'", fmt); - printf("Formating '%s', fmt=%s", - filename, fmt); - if (encrypted) - printf(", encrypted"); - if (base_filename) { - printf(", backing_file=%s", - base_filename); + + if (options) { + param = parse_option_parameters(options, drv->create_options, param); + if (param == NULL) { + error("Invalid options for file format '%s'.", fmt); + } + } else { + param = parse_option_parameters("", drv->create_options, param); + } + + /* Add size to parameters */ + if (optind < argc) { + set_option_parameter(param, BLOCK_OPT_SIZE, argv[optind++]); + } + + /* Add old-style options to parameters */ + add_old_style_options(fmt, param, flags, base_filename, base_fmt); + + // The size for the image must always be specified, with one exception: + // If we are using a backing file, we can obtain the size from there + if (get_option_parameter(param, BLOCK_OPT_SIZE)->value.n == 0) { + + QEMUOptionParameter *backing_file = + get_option_parameter(param, BLOCK_OPT_BACKING_FILE); + QEMUOptionParameter *backing_fmt = + get_option_parameter(param, BLOCK_OPT_BACKING_FMT); + + if (backing_file && backing_file->value.s) { + BlockDriverState *bs; + uint64_t size; + const char *fmt = NULL; + char buf[32]; + + if (backing_fmt && backing_fmt->value.s) { + if (bdrv_find_format(backing_fmt->value.s)) { + fmt = backing_fmt->value.s; + } else { + error("Unknown backing file format '%s'", + backing_fmt->value.s); + } + } + + bs = bdrv_new_open(backing_file->value.s, fmt); + bdrv_get_geometry(bs, &size); + size *= 512; + bdrv_delete(bs); + + snprintf(buf, sizeof(buf), "%" PRId64, size); + set_option_parameter(param, BLOCK_OPT_SIZE, buf); + } else { + error("Image creation needs a size parameter"); + } } - printf(", size=%lld kB\n", (long long) (size / 1024)); - ret = bdrv_create(drv, filename, size / 512, base_filename, encrypted); + + printf("Formatting '%s', fmt=%s ", filename, fmt); + print_option_parameters(param); + puts(""); + + ret = bdrv_create(drv, filename, param); + free_option_parameters(param); + if (ret < 0) { if (ret == -ENOTSUP) { error("Formatting or formatting option not supported for file format '%s'", fmt); + } else if (ret == -EFBIG) { + error("The image size is too large for file format '%s'", fmt); } else { error("Error while formatting"); } @@ -381,6 +362,65 @@ static int img_create(int argc, char **argv) return 0; } +static int img_check(int argc, char **argv) +{ + int c, ret; + const char *filename, *fmt; + BlockDriver *drv; + BlockDriverState *bs; + + fmt = NULL; + for(;;) { + c = getopt(argc, argv, "f:h"); + if (c == -1) + break; + switch(c) { + case 'h': + help(); + break; + case 'f': + fmt = optarg; + break; + } + } + if (optind >= argc) + help(); + filename = argv[optind++]; + + bs = bdrv_new(""); + if (!bs) + error("Not enough memory"); + if (fmt) { + drv = bdrv_find_format(fmt); + if (!drv) + error("Unknown file format '%s'", fmt); + } else { + drv = NULL; + } + if (bdrv_open2(bs, filename, BRDV_O_FLAGS, drv) < 0) { + error("Could not open '%s'", filename); + } + ret = bdrv_check(bs); + switch(ret) { + case 0: + printf("No errors were found on the image.\n"); + break; + case -ENOTSUP: + error("This image format does not support checks"); + break; + default: + if (ret < 0) { + error("An error occurred during the check"); + } else { + printf("%d errors were found on the image.\n", ret); + } + break; + } + + bdrv_delete(bs); + return 0; +} + static int img_commit(int argc, char **argv) { int c, ret; @@ -402,7 +442,7 @@ static int img_commit(int argc, char **argv) break; } } - if (optind >= argc) + if (optind >= argc) help(); filename = argv[optind++]; @@ -416,7 +456,7 @@ static int img_commit(int argc, char **argv) } else { drv = NULL; } - if (bdrv_open2(bs, filename, 0, drv) < 0) { + if (bdrv_open2(bs, filename, BRDV_O_FLAGS, drv) < 0) { error("Could not open '%s'", filename); } ret = bdrv_commit(bs); @@ -453,6 +493,13 @@ static int is_not_zero(const uint8_t *sector, int len) return 0; } +/* + * Returns true iff the first sector pointed to by 'buf' contains at least + * a non-NUL byte. + * + * 'pnum' is set to the number of sectors (including and immediately following + * the first one) that are known to be in the same allocated/unallocated state. + */ static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) { int v, i; @@ -475,20 +522,24 @@ static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) static int img_convert(int argc, char **argv) { - int c, ret, n, n1, compress, cluster_size, cluster_sectors, encrypt; - const char *filename, *fmt, *out_fmt, *out_filename; + int c, ret, n, n1, bs_n, bs_i, flags, cluster_size, cluster_sectors; + const char *fmt, *out_fmt, *out_baseimg, *out_filename; BlockDriver *drv; - BlockDriverState *bs, *out_bs; - int64_t total_sectors, nb_sectors, sector_num; + BlockDriverState **bs, *out_bs; + int64_t total_sectors, nb_sectors, sector_num, bs_offset; + uint64_t bs_sectors; uint8_t buf[IO_BUF_SIZE]; const uint8_t *buf1; + BlockDriverInfo bdi; + QEMUOptionParameter *param = NULL; + char *options = NULL; fmt = NULL; out_fmt = "raw"; - compress = 0; - encrypt = 0; + out_baseimg = NULL; + flags = 0; for(;;) { - c = getopt(argc, argv, "f:O:hce"); + c = getopt(argc, argv, "f:O:B:hce6o:"); if (c == -1) break; switch(c) { @@ -501,51 +552,109 @@ static int img_convert(int argc, char **argv) case 'O': out_fmt = optarg; break; + case 'B': + out_baseimg = optarg; + break; case 'c': - compress = 1; + flags |= BLOCK_FLAG_COMPRESS; break; case 'e': - encrypt = 1; + flags |= BLOCK_FLAG_ENCRYPT; + break; + case '6': + flags |= BLOCK_FLAG_COMPAT6; + break; + case 'o': + options = optarg; break; } } - if (optind >= argc) - help(); - filename = argv[optind++]; - if (optind >= argc) - help(); - out_filename = argv[optind++]; - - bs = bdrv_new_open(filename, fmt); + bs_n = argc - optind - 1; + if (bs_n < 1) help(); + + out_filename = argv[argc - 1]; + + if (bs_n > 1 && out_baseimg) + error("-B makes no sense when concatenating multiple input images"); + + bs = calloc(bs_n, sizeof(BlockDriverState *)); + if (!bs) + error("Out of memory"); + + total_sectors = 0; + for (bs_i = 0; bs_i < bs_n; bs_i++) { + bs[bs_i] = bdrv_new_open(argv[optind + bs_i], fmt); + if (!bs[bs_i]) + error("Could not open '%s'", argv[optind + bs_i]); + bdrv_get_geometry(bs[bs_i], &bs_sectors); + total_sectors += bs_sectors; + } + + /* Find driver and parse its options */ drv = bdrv_find_format(out_fmt); if (!drv) - error("Unknown file format '%s'", fmt); - if (compress && drv != &bdrv_qcow) - error("Compression not supported for this file format"); - if (encrypt && drv != &bdrv_qcow) - error("Encryption not supported for this file format"); - if (compress && encrypt) - error("Compression and encryption not supported at the same time"); - bdrv_get_geometry(bs, &total_sectors); - ret = bdrv_create(drv, out_filename, total_sectors, NULL, encrypt); + error("Unknown file format '%s'", out_fmt); + + if (options) { + param = parse_option_parameters(options, drv->create_options, param); + if (param == NULL) { + error("Invalid options for file format '%s'.", out_fmt); + } + } else { + param = parse_option_parameters("", drv->create_options, param); + } + + set_option_parameter_int(param, BLOCK_OPT_SIZE, total_sectors * 512); + add_old_style_options(out_fmt, param, flags, out_baseimg, NULL); + + /* Check if compression is supported */ + if (flags & BLOCK_FLAG_COMPRESS) { + QEMUOptionParameter *encryption = + get_option_parameter(param, BLOCK_OPT_ENCRYPT); + + if (!drv->bdrv_write_compressed) { + error("Compression not supported for this file format"); + } + + if (encryption && encryption->value.n) { + error("Compression and encryption not supported at the same time"); + } + } + + /* Create the new image */ + ret = bdrv_create(drv, out_filename, param); + free_option_parameters(param); + if (ret < 0) { if (ret == -ENOTSUP) { - error("Formatting not supported for file format '%s'", fmt); + error("Formatting not supported for file format '%s'", out_fmt); + } else if (ret == -EFBIG) { + error("The image size is too large for file format '%s'", out_fmt); } else { error("Error while formatting '%s'", out_filename); } } - + out_bs = bdrv_new_open(out_filename, out_fmt); - if (compress) { - cluster_size = qcow_get_cluster_size(out_bs); + bs_i = 0; + bs_offset = 0; + bdrv_get_geometry(bs[0], &bs_sectors); + + if (flags & BLOCK_FLAG_COMPRESS) { + if (bdrv_get_info(out_bs, &bdi) < 0) + error("could not get block driver info"); + cluster_size = bdi.cluster_size; if (cluster_size <= 0 || cluster_size > IO_BUF_SIZE) error("invalid cluster size"); cluster_sectors = cluster_size >> 9; sector_num = 0; for(;;) { + int64_t bs_num; + int remainder; + uint8_t *buf2; + nb_sectors = total_sectors - sector_num; if (nb_sectors <= 0) break; @@ -553,18 +662,51 @@ static int img_convert(int argc, char **argv) n = cluster_sectors; else n = nb_sectors; - if (bdrv_read(bs, sector_num, buf, n) < 0) - error("error while reading"); + + bs_num = sector_num - bs_offset; + assert (bs_num >= 0); + remainder = n; + buf2 = buf; + while (remainder > 0) { + int nlow; + while (bs_num == bs_sectors) { + bs_i++; + assert (bs_i < bs_n); + bs_offset += bs_sectors; + bdrv_get_geometry(bs[bs_i], &bs_sectors); + bs_num = 0; + /* printf("changing part: sector_num=%lld, " + "bs_i=%d, bs_offset=%lld, bs_sectors=%lld\n", + sector_num, bs_i, bs_offset, bs_sectors); */ + } + assert (bs_num < bs_sectors); + + nlow = (remainder > bs_sectors - bs_num) ? bs_sectors - bs_num : remainder; + + if (bdrv_read(bs[bs_i], bs_num, buf2, nlow) < 0) + error("error while reading"); + + buf2 += nlow * 512; + bs_num += nlow; + + remainder -= nlow; + } + assert (remainder == 0); + if (n < cluster_sectors) memset(buf + n * 512, 0, cluster_size - n * 512); if (is_not_zero(buf, cluster_size)) { - if (qcow_compress_cluster(out_bs, sector_num, buf) != 0) - error("error while compressing sector %lld", sector_num); + if (bdrv_write_compressed(out_bs, sector_num, buf, + cluster_sectors) != 0) + error("error while compressing sector %" PRId64, + sector_num); } sector_num += n; } + /* signal EOF to align */ + bdrv_write_compressed(out_bs, 0, NULL, 0); } else { - sector_num = 0; + sector_num = 0; // total number of sectors converted so far for(;;) { nb_sectors = total_sectors - sector_num; if (nb_sectors <= 0) @@ -573,15 +715,50 @@ static int img_convert(int argc, char **argv) n = (IO_BUF_SIZE / 512); else n = nb_sectors; - if (bdrv_read(bs, sector_num, buf, n) < 0) + + while (sector_num - bs_offset >= bs_sectors) { + bs_i ++; + assert (bs_i < bs_n); + bs_offset += bs_sectors; + bdrv_get_geometry(bs[bs_i], &bs_sectors); + /* printf("changing part: sector_num=%lld, bs_i=%d, " + "bs_offset=%lld, bs_sectors=%lld\n", + sector_num, bs_i, bs_offset, bs_sectors); */ + } + + if (n > bs_offset + bs_sectors - sector_num) + n = bs_offset + bs_sectors - sector_num; + + if (strcmp(drv->format_name, "host_device")) { + if (!bdrv_is_allocated(bs[bs_i], sector_num - bs_offset, + n, &n1)) { + sector_num += n1; + continue; + } + /* The next 'n1' sectors are allocated in the input image. Copy + only those as they may be followed by unallocated sectors. */ + n = n1; + } else { + n1 = n; + } + + if (bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n) < 0) error("error while reading"); /* NOTE: at the same time we convert, we do not write zero sectors to have a chance to compress the image. Ideally, we should add a specific call to have the info to go faster */ buf1 = buf; while (n > 0) { - if (is_allocated_sectors(buf1, n, &n1)) { - if (bdrv_write(out_bs, sector_num, buf1, n1) < 0) + /* If the output image is being created as a copy on write image, + copy all sectors even the ones containing only NUL bytes, + because they may differ from the sectors in the base image. + + If the output is to a host device, we also write out + sectors that are entirely 0, since whatever data was + already there is garbage, not 0s. */ + if (strcmp(drv->format_name, "host_device") == 0 || out_baseimg || + is_allocated_sectors(buf1, n, &n1)) { + if (bdrv_write(out_bs, sector_num, buf1, n1) < 0) error("error while writing"); } sector_num += n1; @@ -591,15 +768,29 @@ static int img_convert(int argc, char **argv) } } bdrv_delete(out_bs); - bdrv_delete(bs); + for (bs_i = 0; bs_i < bs_n; bs_i++) + bdrv_delete(bs[bs_i]); + free(bs); return 0; } #ifdef _WIN32 static int64_t get_allocated_file_size(const char *filename) { + typedef DWORD (WINAPI * get_compressed_t)(const char *filename, DWORD *high); + get_compressed_t get_compressed; struct _stati64 st; - if (_stati64(filename, &st) < 0) + + /* WinNT support GetCompressedFileSize to determine allocate size */ + get_compressed = (get_compressed_t) GetProcAddress(GetModuleHandle("kernel32"), "GetCompressedFileSizeA"); + if (get_compressed) { + DWORD high, low; + low = get_compressed(filename, &high); + if (low != 0xFFFFFFFFlu || GetLastError() == NO_ERROR) + return (((int64_t) high) << 32) + low; + } + + if (_stati64(filename, &st) < 0) return -1; return st.st_size; } @@ -607,12 +798,30 @@ static int64_t get_allocated_file_size(const char *filename) static int64_t get_allocated_file_size(const char *filename) { struct stat st; - if (stat(filename, &st) < 0) + if (stat(filename, &st) < 0) return -1; return (int64_t)st.st_blocks * 512; } #endif +static void dump_snapshots(BlockDriverState *bs) +{ + QEMUSnapshotInfo *sn_tab, *sn; + int nb_sns, i; + char buf[256]; + + nb_sns = bdrv_snapshot_list(bs, &sn_tab); + if (nb_sns <= 0) + return; + printf("Snapshot list:\n"); + printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); + for(i = 0; i < nb_sns; i++) { + sn = &sn_tab[i]; + printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); + } + qemu_free(sn_tab); +} + static int img_info(int argc, char **argv) { int c; @@ -620,7 +829,11 @@ static int img_info(int argc, char **argv) BlockDriver *drv; BlockDriverState *bs; char fmt_name[128], size_buf[128], dsize_buf[128]; - int64_t total_sectors, allocated_size; + uint64_t total_sectors; + int64_t allocated_size; + char backing_filename[1024]; + char backing_filename2[1024]; + BlockDriverInfo bdi; fmt = NULL; for(;;) { @@ -636,7 +849,7 @@ static int img_info(int argc, char **argv) break; } } - if (optind >= argc) + if (optind >= argc) help(); filename = argv[optind++]; @@ -650,7 +863,7 @@ static int img_info(int argc, char **argv) } else { drv = NULL; } - if (bdrv_open2(bs, filename, 0, drv) < 0) { + if (bdrv_open2(bs, filename, BRDV_O_FLAGS, drv) < 0) { error("Could not open '%s'", filename); } bdrv_get_format(bs, fmt_name, sizeof(fmt_name)); @@ -658,22 +871,145 @@ static int img_info(int argc, char **argv) get_human_readable_size(size_buf, sizeof(size_buf), total_sectors * 512); allocated_size = get_allocated_file_size(filename); if (allocated_size < 0) - error("Could not get file size '%s'", filename); - get_human_readable_size(dsize_buf, sizeof(dsize_buf), - allocated_size); + snprintf(dsize_buf, sizeof(dsize_buf), "unavailable"); + else + get_human_readable_size(dsize_buf, sizeof(dsize_buf), + allocated_size); printf("image: %s\n" "file format: %s\n" - "virtual size: %s (%lld bytes)\n" + "virtual size: %s (%" PRId64 " bytes)\n" "disk size: %s\n", - filename, fmt_name, size_buf, - (long long) (total_sectors * 512), + filename, fmt_name, size_buf, + (total_sectors * 512), dsize_buf); if (bdrv_is_encrypted(bs)) printf("encrypted: yes\n"); + if (bdrv_get_info(bs, &bdi) >= 0) { + if (bdi.cluster_size != 0) + printf("cluster_size: %d\n", bdi.cluster_size); + } + bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename)); + if (backing_filename[0] != '\0') { + path_combine(backing_filename2, sizeof(backing_filename2), + filename, backing_filename); + printf("backing file: %s (actual path: %s)\n", + backing_filename, + backing_filename2); + } + dump_snapshots(bs); bdrv_delete(bs); return 0; } +#define SNAPSHOT_LIST 1 +#define SNAPSHOT_CREATE 2 +#define SNAPSHOT_APPLY 3 +#define SNAPSHOT_DELETE 4 + +static void img_snapshot(int argc, char **argv) +{ + BlockDriverState *bs; + QEMUSnapshotInfo sn; + char *filename, *snapshot_name = NULL; + int c, ret; + int action = 0; + qemu_timeval tv; + + /* Parse commandline parameters */ + for(;;) { + c = getopt(argc, argv, "la:c:d:h"); + if (c == -1) + break; + switch(c) { + case 'h': + help(); + return; + case 'l': + if (action) { + help(); + return; + } + action = SNAPSHOT_LIST; + break; + case 'a': + if (action) { + help(); + return; + } + action = SNAPSHOT_APPLY; + snapshot_name = optarg; + break; + case 'c': + if (action) { + help(); + return; + } + action = SNAPSHOT_CREATE; + snapshot_name = optarg; + break; + case 'd': + if (action) { + help(); + return; + } + action = SNAPSHOT_DELETE; + snapshot_name = optarg; + break; + } + } + + if (optind >= argc) + help(); + filename = argv[optind++]; + + /* Open the image */ + bs = bdrv_new(""); + if (!bs) + error("Not enough memory"); + + if (bdrv_open2(bs, filename, 0, NULL) < 0) { + error("Could not open '%s'", filename); + } + + /* Perform the requested action */ + switch(action) { + case SNAPSHOT_LIST: + dump_snapshots(bs); + break; + + case SNAPSHOT_CREATE: + memset(&sn, 0, sizeof(sn)); + pstrcpy(sn.name, sizeof(sn.name), snapshot_name); + + qemu_gettimeofday(&tv); + sn.date_sec = tv.tv_sec; + sn.date_nsec = tv.tv_usec * 1000; + + ret = bdrv_snapshot_create(bs, &sn); + if (ret) + error("Could not create snapshot '%s': %d (%s)", + snapshot_name, ret, strerror(-ret)); + break; + + case SNAPSHOT_APPLY: + ret = bdrv_snapshot_goto(bs, snapshot_name); + if (ret) + error("Could not apply snapshot '%s': %d (%s)", + snapshot_name, ret, strerror(-ret)); + break; + + case SNAPSHOT_DELETE: + ret = bdrv_snapshot_delete(bs, snapshot_name); + if (ret) + error("Could not delete snapshot '%s': %d (%s)", + snapshot_name, ret, strerror(-ret)); + break; + } + + /* Cleanup */ + bdrv_delete(bs); +} + int main(int argc, char **argv) { const char *cmd; @@ -682,15 +1018,19 @@ int main(int argc, char **argv) if (argc < 2) help(); cmd = argv[1]; - optind++; + argc--; argv++; if (!strcmp(cmd, "create")) { img_create(argc, argv); + } else if (!strcmp(cmd, "check")) { + img_check(argc, argv); } else if (!strcmp(cmd, "commit")) { img_commit(argc, argv); } else if (!strcmp(cmd, "convert")) { img_convert(argc, argv); } else if (!strcmp(cmd, "info")) { img_info(argc, argv); + } else if (!strcmp(cmd, "snapshot")) { + img_snapshot(argc, argv); } else { help(); }