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block: Avoid bdrv_get_geometry() where errors should be detected 

bdrv_get_geometry() hides errors.  Use bdrv_nb_sectors() or
bdrv_getlength() instead where that's obviously inappropriate.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Benoit Canet <benoit@irqsave.net>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Markus Armbruster 2014-06-26 13:23:25 +02:00 committed by Kevin Wolf
parent d739f1c410
commit 52bf1e722d
3 changed files with 68 additions and 21 deletions
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11
block.c
View File

@ -5595,7 +5595,7 @@ void bdrv_img_create(const char *filename, const char *fmt,
if (size == -1) {
if (backing_file) {
BlockDriverState *bs;
uint64_t size;
int64_t size;
int back_flags;
/* backing files always opened read-only */
@ -5613,8 +5613,13 @@ void bdrv_img_create(const char *filename, const char *fmt,
local_err = NULL;
goto out;
}
bdrv_get_geometry(bs, &size);
size *= 512;
size = bdrv_getlength(bs);
if (size < 0) {
error_setg_errno(errp, -size, "Could not get size of '%s'",
backing_file);
bdrv_unref(bs);
goto out;
}
qemu_opt_set_number(opts, BLOCK_OPT_SIZE, size);

14
block/qapi.c
View File

@ -165,19 +165,25 @@ void bdrv_query_image_info(BlockDriverState *bs,
ImageInfo **p_info,
Error **errp)
{
uint64_t total_sectors;
int64_t size;
const char *backing_filename;
char backing_filename2[1024];
BlockDriverInfo bdi;
int ret;
Error *err = NULL;
ImageInfo *info = g_new0(ImageInfo, 1);
ImageInfo *info;
bdrv_get_geometry(bs, &total_sectors);
size = bdrv_getlength(bs);
if (size < 0) {
error_setg_errno(errp, -size, "Can't get size of device '%s'",
bdrv_get_device_name(bs));
return;
}
info = g_new0(ImageInfo, 1);
info->filename = g_strdup(bs->filename);
info->format = g_strdup(bdrv_get_format_name(bs));
info->virtual_size = total_sectors * 512;
info->virtual_size = size;
info->actual_size = bdrv_get_allocated_file_size(bs);
info->has_actual_size = info->actual_size >= 0;
if (bdrv_is_encrypted(bs)) {

64
qemu-img.c
View File

@ -955,7 +955,6 @@ static int img_compare(int argc, char **argv)
int64_t sector_num = 0;
int64_t nb_sectors;
int c, pnum;
uint64_t bs_sectors;
uint64_t progress_base;
for (;;) {
@ -1017,10 +1016,20 @@ static int img_compare(int argc, char **argv)
buf1 = qemu_blockalign(bs1, IO_BUF_SIZE);
buf2 = qemu_blockalign(bs2, IO_BUF_SIZE);
bdrv_get_geometry(bs1, &bs_sectors);
total_sectors1 = bs_sectors;
bdrv_get_geometry(bs2, &bs_sectors);
total_sectors2 = bs_sectors;
total_sectors1 = bdrv_nb_sectors(bs1);
if (total_sectors1 < 0) {
error_report("Can't get size of %s: %s",
filename1, strerror(-total_sectors1));
ret = 4;
goto out;
}
total_sectors2 = bdrv_nb_sectors(bs2);
if (total_sectors2 < 0) {
error_report("Can't get size of %s: %s",
filename2, strerror(-total_sectors2));
ret = 4;
goto out;
}
total_sectors = MIN(total_sectors1, total_sectors2);
progress_base = MAX(total_sectors1, total_sectors2);
@ -1182,7 +1191,7 @@ static int img_convert(int argc, char **argv)
BlockDriver *drv, *proto_drv;
BlockDriverState **bs = NULL, *out_bs = NULL;
int64_t total_sectors, nb_sectors, sector_num, bs_offset;
uint64_t *bs_sectors = NULL;
int64_t *bs_sectors = NULL;
uint8_t * buf = NULL;
size_t bufsectors = IO_BUF_SIZE / BDRV_SECTOR_SIZE;
const uint8_t *buf1;
@ -1324,7 +1333,7 @@ static int img_convert(int argc, char **argv)
qemu_progress_print(0, 100);
bs = g_new0(BlockDriverState *, bs_n);
bs_sectors = g_new(uint64_t, bs_n);
bs_sectors = g_new(int64_t, bs_n);
total_sectors = 0;
for (bs_i = 0; bs_i < bs_n; bs_i++) {
@ -1338,7 +1347,13 @@ static int img_convert(int argc, char **argv)
ret = -1;
goto out;
}
bdrv_get_geometry(bs[bs_i], &bs_sectors[bs_i]);
bs_sectors[bs_i] = bdrv_nb_sectors(bs[bs_i]);
if (bs_sectors[bs_i] < 0) {
error_report("Could not get size of %s: %s",
argv[optind + bs_i], strerror(-bs_sectors[bs_i]));
ret = -1;
goto out;
}
total_sectors += bs_sectors[bs_i];
}
@ -2413,9 +2428,9 @@ static int img_rebase(int argc, char **argv)
* the image is the same as the original one at any time.
*/
if (!unsafe) {
uint64_t num_sectors;
uint64_t old_backing_num_sectors;
uint64_t new_backing_num_sectors = 0;
int64_t num_sectors;
int64_t old_backing_num_sectors;
int64_t new_backing_num_sectors = 0;
uint64_t sector;
int n;
uint8_t * buf_old;
@ -2425,10 +2440,31 @@ static int img_rebase(int argc, char **argv)
buf_old = qemu_blockalign(bs, IO_BUF_SIZE);
buf_new = qemu_blockalign(bs, IO_BUF_SIZE);
bdrv_get_geometry(bs, &num_sectors);
bdrv_get_geometry(bs_old_backing, &old_backing_num_sectors);
num_sectors = bdrv_nb_sectors(bs);
if (num_sectors < 0) {
error_report("Could not get size of '%s': %s",
filename, strerror(-num_sectors));
ret = -1;
goto out;
}
old_backing_num_sectors = bdrv_nb_sectors(bs_old_backing);
if (old_backing_num_sectors < 0) {
char backing_name[1024];
bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name));
error_report("Could not get size of '%s': %s",
backing_name, strerror(-old_backing_num_sectors));
ret = -1;
goto out;
}
if (bs_new_backing) {
bdrv_get_geometry(bs_new_backing, &new_backing_num_sectors);
new_backing_num_sectors = bdrv_nb_sectors(bs_new_backing);
if (new_backing_num_sectors < 0) {
error_report("Could not get size of '%s': %s",
out_baseimg, strerror(-new_backing_num_sectors));
ret = -1;
goto out;
}
}
if (num_sectors != 0) {