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qemu-img: avoid calling exit(1) to release resources properly
This patch removes exit(1) from error(), and properly releases resources such as a block driver and an allocated memory. For testing the Sheepdog block driver with qemu-iotests, it is necessary to call bdrv_delete() before the program exits. Because the driver releases the lock of VM images in the close handler. Signed-off-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
MORITA Kazutaka
Kevin Wolf
parent
c0897e0cb9
commit
c2abccecd9
237
qemu-img.c
237
qemu-img.c
@ -39,14 +39,13 @@ typedef struct img_cmd_t {
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/* Default to cache=writeback as data integrity is not important for qemu-tcg. */
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#define BDRV_O_FLAGS BDRV_O_CACHE_WB
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static void QEMU_NORETURN error(const char *fmt, ...)
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static void error(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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fprintf(stderr, "qemu-img: ");
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vfprintf(stderr, fmt, ap);
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fprintf(stderr, "\n");
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exit(1);
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va_end(ap);
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}
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@ -197,57 +196,76 @@ static BlockDriverState *bdrv_new_open(const char *filename,
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char password[256];
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bs = bdrv_new("");
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if (!bs)
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if (!bs) {
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error("Not enough memory");
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goto fail;
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}
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if (fmt) {
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drv = bdrv_find_format(fmt);
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if (!drv)
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if (!drv) {
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error("Unknown file format '%s'", fmt);
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goto fail;
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}
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} else {
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drv = NULL;
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}
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if (bdrv_open(bs, filename, flags, drv) < 0) {
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error("Could not open '%s'", filename);
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goto fail;
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}
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if (bdrv_is_encrypted(bs)) {
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printf("Disk image '%s' is encrypted.\n", filename);
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if (read_password(password, sizeof(password)) < 0)
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if (read_password(password, sizeof(password)) < 0) {
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error("No password given");
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if (bdrv_set_key(bs, password) < 0)
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goto fail;
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}
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if (bdrv_set_key(bs, password) < 0) {
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error("invalid password");
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goto fail;
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}
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}
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return bs;
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fail:
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if (bs) {
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bdrv_delete(bs);
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}
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return NULL;
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}
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static void add_old_style_options(const char *fmt, QEMUOptionParameter *list,
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static int add_old_style_options(const char *fmt, QEMUOptionParameter *list,
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int flags, const char *base_filename, const char *base_fmt)
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{
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if (flags & BLOCK_FLAG_ENCRYPT) {
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if (set_option_parameter(list, BLOCK_OPT_ENCRYPT, "on")) {
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error("Encryption not supported for file format '%s'", fmt);
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return -1;
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}
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}
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if (flags & BLOCK_FLAG_COMPAT6) {
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if (set_option_parameter(list, BLOCK_OPT_COMPAT6, "on")) {
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error("VMDK version 6 not supported for file format '%s'", fmt);
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return -1;
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}
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}
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if (base_filename) {
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if (set_option_parameter(list, BLOCK_OPT_BACKING_FILE, base_filename)) {
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error("Backing file not supported for file format '%s'", fmt);
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return -1;
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}
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}
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if (base_fmt) {
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if (set_option_parameter(list, BLOCK_OPT_BACKING_FMT, base_fmt)) {
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error("Backing file format not supported for file format '%s'", fmt);
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return -1;
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}
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}
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return 0;
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}
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static int img_create(int argc, char **argv)
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{
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int c, ret, flags;
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int c, ret = 0, flags;
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const char *fmt = "raw";
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const char *base_fmt = NULL;
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const char *filename;
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@ -293,12 +311,16 @@ static int img_create(int argc, char **argv)
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/* Find driver and parse its options */
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drv = bdrv_find_format(fmt);
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if (!drv)
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if (!drv) {
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error("Unknown file format '%s'", fmt);
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return 1;
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}
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proto_drv = bdrv_find_protocol(filename);
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if (!proto_drv)
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if (!proto_drv) {
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error("Unknown protocol '%s'", filename);
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return 1;
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}
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create_options = append_option_parameters(create_options,
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drv->create_options);
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@ -307,7 +329,7 @@ static int img_create(int argc, char **argv)
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if (options && !strcmp(options, "?")) {
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print_option_help(create_options);
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return 0;
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goto out;
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}
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/* Create parameter list with default values */
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@ -319,6 +341,8 @@ static int img_create(int argc, char **argv)
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param = parse_option_parameters(options, create_options, param);
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if (param == NULL) {
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error("Invalid options for file format '%s'.", fmt);
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ret = -1;
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goto out;
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}
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}
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@ -328,7 +352,10 @@ static int img_create(int argc, char **argv)
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}
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/* Add old-style options to parameters */
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add_old_style_options(fmt, param, flags, base_filename, base_fmt);
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ret = add_old_style_options(fmt, param, flags, base_filename, base_fmt);
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if (ret < 0) {
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goto out;
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}
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// The size for the image must always be specified, with one exception:
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// If we are using a backing file, we can obtain the size from there
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@ -351,10 +378,16 @@ static int img_create(int argc, char **argv)
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} else {
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error("Unknown backing file format '%s'",
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backing_fmt->value.s);
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ret = -1;
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goto out;
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}
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}
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bs = bdrv_new_open(backing_file->value.s, fmt, BDRV_O_FLAGS);
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if (!bs) {
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ret = -1;
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goto out;
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}
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bdrv_get_geometry(bs, &size);
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size *= 512;
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bdrv_delete(bs);
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@ -363,6 +396,8 @@ static int img_create(int argc, char **argv)
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set_option_parameter(param, BLOCK_OPT_SIZE, buf);
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} else {
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error("Image creation needs a size parameter");
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ret = -1;
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goto out;
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}
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}
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@ -383,6 +418,10 @@ static int img_create(int argc, char **argv)
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error("%s: error while creating %s: %s", filename, fmt, strerror(-ret));
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}
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}
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out:
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if (ret) {
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return 1;
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}
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return 0;
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}
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@ -411,6 +450,9 @@ static int img_check(int argc, char **argv)
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filename = argv[optind++];
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bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS);
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if (!bs) {
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return 1;
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}
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ret = bdrv_check(bs);
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switch(ret) {
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case 0:
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@ -429,6 +471,9 @@ static int img_check(int argc, char **argv)
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}
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bdrv_delete(bs);
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if (ret) {
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return 1;
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}
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return 0;
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}
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@ -457,6 +502,9 @@ static int img_commit(int argc, char **argv)
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filename = argv[optind++];
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bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR);
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if (!bs) {
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return 1;
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}
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ret = bdrv_commit(bs);
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switch(ret) {
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case 0:
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@ -477,6 +525,9 @@ static int img_commit(int argc, char **argv)
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}
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bdrv_delete(bs);
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if (ret) {
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return 1;
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}
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return 0;
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}
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@ -551,13 +602,13 @@ static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n,
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static int img_convert(int argc, char **argv)
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{
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int c, ret, n, n1, bs_n, bs_i, flags, cluster_size, cluster_sectors;
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int c, ret = 0, n, n1, bs_n, bs_i, flags, cluster_size, cluster_sectors;
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const char *fmt, *out_fmt, *out_baseimg, *out_filename;
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BlockDriver *drv, *proto_drv;
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BlockDriverState **bs, *out_bs;
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BlockDriverState **bs = NULL, *out_bs = NULL;
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int64_t total_sectors, nb_sectors, sector_num, bs_offset;
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uint64_t bs_sectors;
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uint8_t * buf;
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uint8_t * buf = NULL;
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const uint8_t *buf1;
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BlockDriverInfo bdi;
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QEMUOptionParameter *param = NULL, *create_options = NULL;
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@ -604,30 +655,43 @@ static int img_convert(int argc, char **argv)
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out_filename = argv[argc - 1];
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if (bs_n > 1 && out_baseimg)
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if (bs_n > 1 && out_baseimg) {
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error("-B makes no sense when concatenating multiple input images");
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return 1;
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}
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bs = calloc(bs_n, sizeof(BlockDriverState *));
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if (!bs)
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if (!bs) {
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error("Out of memory");
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return 1;
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}
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total_sectors = 0;
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for (bs_i = 0; bs_i < bs_n; bs_i++) {
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bs[bs_i] = bdrv_new_open(argv[optind + bs_i], fmt, BDRV_O_FLAGS);
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if (!bs[bs_i])
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if (!bs[bs_i]) {
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error("Could not open '%s'", argv[optind + bs_i]);
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ret = -1;
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goto out;
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}
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bdrv_get_geometry(bs[bs_i], &bs_sectors);
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total_sectors += bs_sectors;
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}
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/* Find driver and parse its options */
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drv = bdrv_find_format(out_fmt);
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if (!drv)
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if (!drv) {
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error("Unknown file format '%s'", out_fmt);
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ret = -1;
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goto out;
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}
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proto_drv = bdrv_find_protocol(out_filename);
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if (!proto_drv)
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if (!proto_drv) {
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error("Unknown protocol '%s'", out_filename);
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ret = -1;
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goto out;
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}
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create_options = append_option_parameters(create_options,
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drv->create_options);
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@ -635,21 +699,25 @@ static int img_convert(int argc, char **argv)
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proto_drv->create_options);
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if (options && !strcmp(options, "?")) {
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print_option_help(create_options);
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free(bs);
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return 0;
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goto out;
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}
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if (options) {
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param = parse_option_parameters(options, create_options, param);
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if (param == NULL) {
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error("Invalid options for file format '%s'.", out_fmt);
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ret = -1;
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goto out;
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}
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} else {
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param = parse_option_parameters("", create_options, param);
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}
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set_option_parameter_int(param, BLOCK_OPT_SIZE, total_sectors * 512);
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add_old_style_options(out_fmt, param, flags, out_baseimg, NULL);
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ret = add_old_style_options(out_fmt, param, flags, out_baseimg, NULL);
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if (ret < 0) {
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goto out;
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}
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/* Check if compression is supported */
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if (flags & BLOCK_FLAG_COMPRESS) {
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@ -658,18 +726,19 @@ static int img_convert(int argc, char **argv)
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if (!drv->bdrv_write_compressed) {
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error("Compression not supported for this file format");
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ret = -1;
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goto out;
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}
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if (encryption && encryption->value.n) {
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error("Compression and encryption not supported at the same time");
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ret = -1;
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goto out;
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}
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}
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/* Create the new image */
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ret = bdrv_create(drv, out_filename, param);
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free_option_parameters(create_options);
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free_option_parameters(param);
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if (ret < 0) {
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if (ret == -ENOTSUP) {
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error("Formatting not supported for file format '%s'", out_fmt);
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@ -678,9 +747,14 @@ static int img_convert(int argc, char **argv)
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} else {
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error("%s: error while converting %s: %s", out_filename, out_fmt, strerror(-ret));
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}
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goto out;
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}
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out_bs = bdrv_new_open(out_filename, out_fmt, BDRV_O_FLAGS | BDRV_O_RDWR);
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if (!out_bs) {
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ret = -1;
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goto out;
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}
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bs_i = 0;
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bs_offset = 0;
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@ -688,11 +762,17 @@ static int img_convert(int argc, char **argv)
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buf = qemu_malloc(IO_BUF_SIZE);
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if (flags & BLOCK_FLAG_COMPRESS) {
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if (bdrv_get_info(out_bs, &bdi) < 0)
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ret = bdrv_get_info(out_bs, &bdi);
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if (ret < 0) {
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error("could not get block driver info");
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goto out;
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}
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cluster_size = bdi.cluster_size;
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if (cluster_size <= 0 || cluster_size > IO_BUF_SIZE)
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if (cluster_size <= 0 || cluster_size > IO_BUF_SIZE) {
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error("invalid cluster size");
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ret = -1;
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goto out;
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}
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cluster_sectors = cluster_size >> 9;
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sector_num = 0;
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for(;;) {
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@ -728,8 +808,11 @@ static int img_convert(int argc, char **argv)
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nlow = (remainder > bs_sectors - bs_num) ? bs_sectors - bs_num : remainder;
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if (bdrv_read(bs[bs_i], bs_num, buf2, nlow) < 0)
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ret = bdrv_read(bs[bs_i], bs_num, buf2, nlow);
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if (ret < 0) {
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error("error while reading");
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goto out;
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}
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buf2 += nlow * 512;
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bs_num += nlow;
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@ -741,10 +824,13 @@ static int img_convert(int argc, char **argv)
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if (n < cluster_sectors)
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memset(buf + n * 512, 0, cluster_size - n * 512);
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if (is_not_zero(buf, cluster_size)) {
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if (bdrv_write_compressed(out_bs, sector_num, buf,
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cluster_sectors) != 0)
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ret = bdrv_write_compressed(out_bs, sector_num, buf,
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cluster_sectors);
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if (ret != 0) {
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error("error while compressing sector %" PRId64,
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sector_num);
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goto out;
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}
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}
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sector_num += n;
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}
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@ -795,8 +881,11 @@ static int img_convert(int argc, char **argv)
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n1 = n;
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}
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if (bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n) < 0)
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ret = bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n);
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if (ret < 0) {
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error("error while reading");
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goto out;
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}
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/* NOTE: at the same time we convert, we do not write zero
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sectors to have a chance to compress the image. Ideally, we
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should add a specific call to have the info to go faster */
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@ -811,8 +900,11 @@ static int img_convert(int argc, char **argv)
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already there is garbage, not 0s. */
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if (!has_zero_init || out_baseimg ||
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is_allocated_sectors(buf1, n, &n1)) {
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if (bdrv_write(out_bs, sector_num, buf1, n1) < 0)
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ret = bdrv_write(out_bs, sector_num, buf1, n1);
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if (ret < 0) {
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error("error while writing");
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goto out;
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}
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}
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sector_num += n1;
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n -= n1;
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@ -820,11 +912,22 @@ static int img_convert(int argc, char **argv)
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}
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}
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}
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out:
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free_option_parameters(create_options);
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free_option_parameters(param);
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qemu_free(buf);
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bdrv_delete(out_bs);
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for (bs_i = 0; bs_i < bs_n; bs_i++)
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bdrv_delete(bs[bs_i]);
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if (out_bs) {
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bdrv_delete(out_bs);
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}
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for (bs_i = 0; bs_i < bs_n; bs_i++) {
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if (bs[bs_i]) {
|
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bdrv_delete(bs[bs_i]);
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}
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}
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free(bs);
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if (ret) {
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return 1;
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}
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return 0;
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}
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@ -907,6 +1010,9 @@ static int img_info(int argc, char **argv)
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filename = argv[optind++];
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bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_NO_BACKING);
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if (!bs) {
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return 1;
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}
|
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bdrv_get_format(bs, fmt_name, sizeof(fmt_name));
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bdrv_get_geometry(bs, &total_sectors);
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get_human_readable_size(size_buf, sizeof(size_buf), total_sectors * 512);
|
||||
@ -952,7 +1058,7 @@ static int img_snapshot(int argc, char **argv)
|
||||
BlockDriverState *bs;
|
||||
QEMUSnapshotInfo sn;
|
||||
char *filename, *snapshot_name = NULL;
|
||||
int c, ret, bdrv_oflags;
|
||||
int c, ret = 0, bdrv_oflags;
|
||||
int action = 0;
|
||||
qemu_timeval tv;
|
||||
|
||||
@ -1007,6 +1113,9 @@ static int img_snapshot(int argc, char **argv)
|
||||
|
||||
/* Open the image */
|
||||
bs = bdrv_new_open(filename, NULL, bdrv_oflags);
|
||||
if (!bs) {
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* Perform the requested action */
|
||||
switch(action) {
|
||||
@ -1045,13 +1154,15 @@ static int img_snapshot(int argc, char **argv)
|
||||
|
||||
/* Cleanup */
|
||||
bdrv_delete(bs);
|
||||
|
||||
if (ret) {
|
||||
return 1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int img_rebase(int argc, char **argv)
|
||||
{
|
||||
BlockDriverState *bs, *bs_old_backing, *bs_new_backing;
|
||||
BlockDriverState *bs, *bs_old_backing = NULL, *bs_new_backing = NULL;
|
||||
BlockDriver *old_backing_drv, *new_backing_drv;
|
||||
char *filename;
|
||||
const char *fmt, *out_basefmt, *out_baseimg;
|
||||
@ -1098,6 +1209,9 @@ static int img_rebase(int argc, char **argv)
|
||||
*/
|
||||
flags = BDRV_O_FLAGS | BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0);
|
||||
bs = bdrv_new_open(filename, fmt, flags);
|
||||
if (!bs) {
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* Find the right drivers for the backing files */
|
||||
old_backing_drv = NULL;
|
||||
@ -1107,6 +1221,8 @@ static int img_rebase(int argc, char **argv)
|
||||
old_backing_drv = bdrv_find_format(bs->backing_format);
|
||||
if (old_backing_drv == NULL) {
|
||||
error("Invalid format name: '%s'", bs->backing_format);
|
||||
ret = -1;
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
|
||||
@ -1114,6 +1230,8 @@ static int img_rebase(int argc, char **argv)
|
||||
new_backing_drv = bdrv_find_format(out_basefmt);
|
||||
if (new_backing_drv == NULL) {
|
||||
error("Invalid format name: '%s'", out_basefmt);
|
||||
ret = -1;
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
|
||||
@ -1127,19 +1245,19 @@ static int img_rebase(int argc, char **argv)
|
||||
|
||||
bs_old_backing = bdrv_new("old_backing");
|
||||
bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name));
|
||||
if (bdrv_open(bs_old_backing, backing_name, BDRV_O_FLAGS,
|
||||
old_backing_drv))
|
||||
{
|
||||
ret = bdrv_open(bs_old_backing, backing_name, BDRV_O_FLAGS,
|
||||
old_backing_drv);
|
||||
if (ret) {
|
||||
error("Could not open old backing file '%s'", backing_name);
|
||||
return -1;
|
||||
goto out;
|
||||
}
|
||||
|
||||
bs_new_backing = bdrv_new("new_backing");
|
||||
if (bdrv_open(bs_new_backing, out_baseimg, BDRV_O_FLAGS | BDRV_O_RDWR,
|
||||
new_backing_drv))
|
||||
{
|
||||
ret = bdrv_open(bs_new_backing, out_baseimg, BDRV_O_FLAGS | BDRV_O_RDWR,
|
||||
new_backing_drv);
|
||||
if (ret) {
|
||||
error("Could not open new backing file '%s'", out_baseimg);
|
||||
return -1;
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
|
||||
@ -1180,11 +1298,15 @@ static int img_rebase(int argc, char **argv)
|
||||
}
|
||||
|
||||
/* Read old and new backing file */
|
||||
if (bdrv_read(bs_old_backing, sector, buf_old, n) < 0) {
|
||||
ret = bdrv_read(bs_old_backing, sector, buf_old, n);
|
||||
if (ret < 0) {
|
||||
error("error while reading from old backing file");
|
||||
goto out;
|
||||
}
|
||||
if (bdrv_read(bs_new_backing, sector, buf_new, n) < 0) {
|
||||
ret = bdrv_read(bs_new_backing, sector, buf_new, n);
|
||||
if (ret < 0) {
|
||||
error("error while reading from new backing file");
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* If they differ, we need to write to the COW file */
|
||||
@ -1201,6 +1323,7 @@ static int img_rebase(int argc, char **argv)
|
||||
if (ret < 0) {
|
||||
error("Error while writing to COW image: %s",
|
||||
strerror(-ret));
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
|
||||
@ -1232,7 +1355,7 @@ static int img_rebase(int argc, char **argv)
|
||||
* could be dropped from the COW file. Don't do this before switching the
|
||||
* backing file, in case of a crash this would lead to corruption.
|
||||
*/
|
||||
|
||||
out:
|
||||
/* Cleanup */
|
||||
if (!unsafe) {
|
||||
bdrv_delete(bs_old_backing);
|
||||
@ -1240,7 +1363,9 @@ static int img_rebase(int argc, char **argv)
|
||||
}
|
||||
|
||||
bdrv_delete(bs);
|
||||
|
||||
if (ret) {
|
||||
return 1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -1306,6 +1431,9 @@ static int img_resize(int argc, char **argv)
|
||||
free_option_parameters(param);
|
||||
|
||||
bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR);
|
||||
if (!bs) {
|
||||
return 1;
|
||||
}
|
||||
|
||||
if (relative) {
|
||||
total_size = bdrv_getlength(bs) + n * relative;
|
||||
@ -1314,6 +1442,8 @@ static int img_resize(int argc, char **argv)
|
||||
}
|
||||
if (total_size <= 0) {
|
||||
error("New image size must be positive");
|
||||
ret = -1;
|
||||
goto out;
|
||||
}
|
||||
|
||||
ret = bdrv_truncate(bs, total_size);
|
||||
@ -1331,8 +1461,11 @@ static int img_resize(int argc, char **argv)
|
||||
error("Error resizing image (%d)", -ret);
|
||||
break;
|
||||
}
|
||||
|
||||
out:
|
||||
bdrv_delete(bs);
|
||||
if (ret) {
|
||||
return 1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user