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Diffstat (limited to 'qemu-img.c')
-rw-r--r--qemu-img.c375
1 files changed, 364 insertions, 11 deletions
diff --git a/qemu-img.c b/qemu-img.c
index f204d04136..6949b73ca5 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -25,7 +25,7 @@
#include "qemu-version.h"
#include "qapi/error.h"
#include "qapi-visit.h"
-#include "qapi/qmp-output-visitor.h"
+#include "qapi/qobject-output-visitor.h"
#include "qapi/qmp/qerror.h"
#include "qapi/qmp/qjson.h"
#include "qemu/cutils.h"
@@ -44,7 +44,7 @@
#include <getopt.h>
#define QEMU_IMG_VERSION "qemu-img version " QEMU_VERSION QEMU_PKGVERSION \
- ", " QEMU_COPYRIGHT "\n"
+ "\n" QEMU_COPYRIGHT "\n"
typedef struct img_cmd_t {
const char *name;
@@ -166,7 +166,15 @@ static void QEMU_NORETURN help(void)
"Parameters to compare subcommand:\n"
" '-f' first image format\n"
" '-F' second image format\n"
- " '-s' run in Strict mode - fail on different image size or sector allocation\n";
+ " '-s' run in Strict mode - fail on different image size or sector allocation\n"
+ "\n"
+ "Parameters to dd subcommand:\n"
+ " 'bs=BYTES' read and write up to BYTES bytes at a time "
+ "(default: 512)\n"
+ " 'count=N' copy only N input blocks\n"
+ " 'if=FILE' read from FILE\n"
+ " 'of=FILE' write to FILE\n"
+ " 'skip=N' skip N bs-sized blocks at the start of input\n";
printf("%s\nSupported formats:", help_msg);
bdrv_iterate_format(format_print, NULL);
@@ -492,7 +500,7 @@ static void dump_json_image_check(ImageCheck *check, bool quiet)
{
QString *str;
QObject *obj;
- Visitor *v = qmp_output_visitor_new(&obj);
+ Visitor *v = qobject_output_visitor_new(&obj);
visit_type_ImageCheck(v, NULL, &check, &error_abort);
visit_complete(v, &obj);
@@ -787,6 +795,7 @@ static void run_block_job(BlockJob *job, Error **errp)
{
AioContext *aio_context = blk_get_aio_context(job->blk);
+ aio_context_acquire(aio_context);
do {
aio_poll(aio_context, true);
qemu_progress_print(job->len ?
@@ -794,6 +803,7 @@ static void run_block_job(BlockJob *job, Error **errp)
} while (!job->ready);
block_job_complete_sync(job, errp);
+ aio_context_release(aio_context);
/* A block job may finish instantaneously without publishing any progress,
* so just signal completion here */
@@ -811,6 +821,7 @@ static int img_commit(int argc, char **argv)
Error *local_err = NULL;
CommonBlockJobCBInfo cbi;
bool image_opts = false;
+ AioContext *aio_context;
fmt = NULL;
cache = BDRV_DEFAULT_CACHE;
@@ -920,8 +931,12 @@ static int img_commit(int argc, char **argv)
.bs = bs,
};
- commit_active_start("commit", bs, base_bs, 0, BLOCKDEV_ON_ERROR_REPORT,
- common_block_job_cb, &cbi, &local_err);
+ aio_context = bdrv_get_aio_context(bs);
+ aio_context_acquire(aio_context);
+ commit_active_start("commit", bs, base_bs, BLOCK_JOB_DEFAULT, 0,
+ BLOCKDEV_ON_ERROR_REPORT, common_block_job_cb, &cbi,
+ &local_err, false);
+ aio_context_release(aio_context);
if (local_err) {
goto done;
}
@@ -1590,7 +1605,9 @@ static int convert_write(ImgConvertState *s, int64_t sector_num, int nb_sectors,
break;
}
- ret = blk_write_compressed(s->target, sector_num, buf, n);
+ ret = blk_pwrite_compressed(s->target,
+ sector_num << BDRV_SECTOR_BITS,
+ buf, n << BDRV_SECTOR_BITS);
if (ret < 0) {
return ret;
}
@@ -1727,7 +1744,7 @@ static int convert_do_copy(ImgConvertState *s)
if (s->compressed) {
/* signal EOF to align */
- ret = blk_write_compressed(s->target, 0, NULL, 0);
+ ret = blk_pwrite_compressed(s->target, 0, NULL, 0);
if (ret < 0) {
goto fail;
}
@@ -2032,7 +2049,7 @@ static int img_convert(int argc, char **argv)
const char *preallocation =
qemu_opt_get(opts, BLOCK_OPT_PREALLOC);
- if (!drv->bdrv_write_compressed) {
+ if (!drv->bdrv_co_pwritev_compressed) {
error_report("Compression not supported for this file format");
ret = -1;
goto out;
@@ -2183,7 +2200,7 @@ static void dump_json_image_info_list(ImageInfoList *list)
{
QString *str;
QObject *obj;
- Visitor *v = qmp_output_visitor_new(&obj);
+ Visitor *v = qobject_output_visitor_new(&obj);
visit_type_ImageInfoList(v, NULL, &list, &error_abort);
visit_complete(v, &obj);
@@ -2199,7 +2216,7 @@ static void dump_json_image_info(ImageInfo *info)
{
QString *str;
QObject *obj;
- Visitor *v = qmp_output_visitor_new(&obj);
+ Visitor *v = qobject_output_visitor_new(&obj);
visit_type_ImageInfo(v, NULL, &info, &error_abort);
visit_complete(v, &obj);
@@ -2946,6 +2963,7 @@ static int img_rebase(int argc, char **argv)
error_reportf_err(local_err,
"Could not open old backing file '%s': ",
backing_name);
+ ret = -1;
goto out;
}
@@ -2963,6 +2981,7 @@ static int img_rebase(int argc, char **argv)
error_reportf_err(local_err,
"Could not open new backing file '%s': ",
out_baseimg);
+ ret = -1;
goto out;
}
}
@@ -3794,6 +3813,339 @@ out:
return 0;
}
+#define C_BS 01
+#define C_COUNT 02
+#define C_IF 04
+#define C_OF 010
+#define C_SKIP 020
+
+struct DdInfo {
+ unsigned int flags;
+ int64_t count;
+};
+
+struct DdIo {
+ int bsz; /* Block size */
+ char *filename;
+ uint8_t *buf;
+ int64_t offset;
+};
+
+struct DdOpts {
+ const char *name;
+ int (*f)(const char *, struct DdIo *, struct DdIo *, struct DdInfo *);
+ unsigned int flag;
+};
+
+static int img_dd_bs(const char *arg,
+ struct DdIo *in, struct DdIo *out,
+ struct DdInfo *dd)
+{
+ char *end;
+ int64_t res;
+
+ res = qemu_strtosz_suffix(arg, &end, QEMU_STRTOSZ_DEFSUFFIX_B);
+
+ if (res <= 0 || res > INT_MAX || *end) {
+ error_report("invalid number: '%s'", arg);
+ return 1;
+ }
+ in->bsz = out->bsz = res;
+
+ return 0;
+}
+
+static int img_dd_count(const char *arg,
+ struct DdIo *in, struct DdIo *out,
+ struct DdInfo *dd)
+{
+ char *end;
+
+ dd->count = qemu_strtosz_suffix(arg, &end, QEMU_STRTOSZ_DEFSUFFIX_B);
+
+ if (dd->count < 0 || *end) {
+ error_report("invalid number: '%s'", arg);
+ return 1;
+ }
+
+ return 0;
+}
+
+static int img_dd_if(const char *arg,
+ struct DdIo *in, struct DdIo *out,
+ struct DdInfo *dd)
+{
+ in->filename = g_strdup(arg);
+
+ return 0;
+}
+
+static int img_dd_of(const char *arg,
+ struct DdIo *in, struct DdIo *out,
+ struct DdInfo *dd)
+{
+ out->filename = g_strdup(arg);
+
+ return 0;
+}
+
+static int img_dd_skip(const char *arg,
+ struct DdIo *in, struct DdIo *out,
+ struct DdInfo *dd)
+{
+ char *end;
+
+ in->offset = qemu_strtosz_suffix(arg, &end, QEMU_STRTOSZ_DEFSUFFIX_B);
+
+ if (in->offset < 0 || *end) {
+ error_report("invalid number: '%s'", arg);
+ return 1;
+ }
+
+ return 0;
+}
+
+static int img_dd(int argc, char **argv)
+{
+ int ret = 0;
+ char *arg = NULL;
+ char *tmp;
+ BlockDriver *drv = NULL, *proto_drv = NULL;
+ BlockBackend *blk1 = NULL, *blk2 = NULL;
+ QemuOpts *opts = NULL;
+ QemuOptsList *create_opts = NULL;
+ Error *local_err = NULL;
+ bool image_opts = false;
+ int c, i;
+ const char *out_fmt = "raw";
+ const char *fmt = NULL;
+ int64_t size = 0;
+ int64_t block_count = 0, out_pos, in_pos;
+ struct DdInfo dd = {
+ .flags = 0,
+ .count = 0,
+ };
+ struct DdIo in = {
+ .bsz = 512, /* Block size is by default 512 bytes */
+ .filename = NULL,
+ .buf = NULL,
+ .offset = 0
+ };
+ struct DdIo out = {
+ .bsz = 512,
+ .filename = NULL,
+ .buf = NULL,
+ .offset = 0
+ };
+
+ const struct DdOpts options[] = {
+ { "bs", img_dd_bs, C_BS },
+ { "count", img_dd_count, C_COUNT },
+ { "if", img_dd_if, C_IF },
+ { "of", img_dd_of, C_OF },
+ { "skip", img_dd_skip, C_SKIP },
+ { NULL, NULL, 0 }
+ };
+ const struct option long_options[] = {
+ { "help", no_argument, 0, 'h'},
+ { "image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
+ { 0, 0, 0, 0 }
+ };
+
+ while ((c = getopt_long(argc, argv, "hf:O:", long_options, NULL))) {
+ if (c == EOF) {
+ break;
+ }
+ switch (c) {
+ case 'O':
+ out_fmt = optarg;
+ break;
+ case 'f':
+ fmt = optarg;
+ break;
+ case '?':
+ error_report("Try 'qemu-img --help' for more information.");
+ ret = -1;
+ goto out;
+ case 'h':
+ help();
+ break;
+ case OPTION_IMAGE_OPTS:
+ image_opts = true;
+ break;
+ }
+ }
+
+ for (i = optind; i < argc; i++) {
+ int j;
+ arg = g_strdup(argv[i]);
+
+ tmp = strchr(arg, '=');
+ if (tmp == NULL) {
+ error_report("unrecognized operand %s", arg);
+ ret = -1;
+ goto out;
+ }
+
+ *tmp++ = '\0';
+
+ for (j = 0; options[j].name != NULL; j++) {
+ if (!strcmp(arg, options[j].name)) {
+ break;
+ }
+ }
+ if (options[j].name == NULL) {
+ error_report("unrecognized operand %s", arg);
+ ret = -1;
+ goto out;
+ }
+
+ if (options[j].f(tmp, &in, &out, &dd) != 0) {
+ ret = -1;
+ goto out;
+ }
+ dd.flags |= options[j].flag;
+ g_free(arg);
+ arg = NULL;
+ }
+
+ if (!(dd.flags & C_IF && dd.flags & C_OF)) {
+ error_report("Must specify both input and output files");
+ ret = -1;
+ goto out;
+ }
+ blk1 = img_open(image_opts, in.filename, fmt, 0, false, false);
+
+ if (!blk1) {
+ ret = -1;
+ goto out;
+ }
+
+ drv = bdrv_find_format(out_fmt);
+ if (!drv) {
+ error_report("Unknown file format");
+ ret = -1;
+ goto out;
+ }
+ proto_drv = bdrv_find_protocol(out.filename, true, &local_err);
+
+ if (!proto_drv) {
+ error_report_err(local_err);
+ ret = -1;
+ goto out;
+ }
+ if (!drv->create_opts) {
+ error_report("Format driver '%s' does not support image creation",
+ drv->format_name);
+ ret = -1;
+ goto out;
+ }
+ if (!proto_drv->create_opts) {
+ error_report("Protocol driver '%s' does not support image creation",
+ proto_drv->format_name);
+ ret = -1;
+ goto out;
+ }
+ create_opts = qemu_opts_append(create_opts, drv->create_opts);
+ create_opts = qemu_opts_append(create_opts, proto_drv->create_opts);
+
+ opts = qemu_opts_create(create_opts, NULL, 0, &error_abort);
+
+ size = blk_getlength(blk1);
+ if (size < 0) {
+ error_report("Failed to get size for '%s'", in.filename);
+ ret = -1;
+ goto out;
+ }
+
+ if (dd.flags & C_COUNT && dd.count <= INT64_MAX / in.bsz &&
+ dd.count * in.bsz < size) {
+ size = dd.count * in.bsz;
+ }
+
+ /* Overflow means the specified offset is beyond input image's size */
+ if (dd.flags & C_SKIP && (in.offset > INT64_MAX / in.bsz ||
+ size < in.bsz * in.offset)) {
+ qemu_opt_set_number(opts, BLOCK_OPT_SIZE, 0, &error_abort);
+ } else {
+ qemu_opt_set_number(opts, BLOCK_OPT_SIZE,
+ size - in.bsz * in.offset, &error_abort);
+ }
+
+ ret = bdrv_create(drv, out.filename, opts, &local_err);
+ if (ret < 0) {
+ error_reportf_err(local_err,
+ "%s: error while creating output image: ",
+ out.filename);
+ ret = -1;
+ goto out;
+ }
+
+ blk2 = img_open(image_opts, out.filename, out_fmt, BDRV_O_RDWR,
+ false, false);
+
+ if (!blk2) {
+ ret = -1;
+ goto out;
+ }
+
+ if (dd.flags & C_SKIP && (in.offset > INT64_MAX / in.bsz ||
+ size < in.offset * in.bsz)) {
+ /* We give a warning if the skip option is bigger than the input
+ * size and create an empty output disk image (i.e. like dd(1)).
+ */
+ error_report("%s: cannot skip to specified offset", in.filename);
+ in_pos = size;
+ } else {
+ in_pos = in.offset * in.bsz;
+ }
+
+ in.buf = g_new(uint8_t, in.bsz);
+
+ for (out_pos = 0; in_pos < size; block_count++) {
+ int in_ret, out_ret;
+
+ if (in_pos + in.bsz > size) {
+ in_ret = blk_pread(blk1, in_pos, in.buf, size - in_pos);
+ } else {
+ in_ret = blk_pread(blk1, in_pos, in.buf, in.bsz);
+ }
+ if (in_ret < 0) {
+ error_report("error while reading from input image file: %s",
+ strerror(-in_ret));
+ ret = -1;
+ goto out;
+ }
+ in_pos += in_ret;
+
+ out_ret = blk_pwrite(blk2, out_pos, in.buf, in_ret, 0);
+
+ if (out_ret < 0) {
+ error_report("error while writing to output image file: %s",
+ strerror(-out_ret));
+ ret = -1;
+ goto out;
+ }
+ out_pos += out_ret;
+ }
+
+out:
+ g_free(arg);
+ qemu_opts_del(opts);
+ qemu_opts_free(create_opts);
+ blk_unref(blk1);
+ blk_unref(blk2);
+ g_free(in.filename);
+ g_free(out.filename);
+ g_free(in.buf);
+ g_free(out.buf);
+
+ if (ret) {
+ return 1;
+ }
+ return 0;
+}
+
static const img_cmd_t img_cmds[] = {
#define DEF(option, callback, arg_string) \
@@ -3822,6 +4174,7 @@ int main(int argc, char **argv)
signal(SIGPIPE, SIG_IGN);
#endif
+ module_call_init(MODULE_INIT_TRACE);
error_set_progname(argv[0]);
qemu_init_exec_dir(argv[0]);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-21 17:17:01 +0000