#include "block/nbd.h"
#include "block/qdict.h"
#include "qemu/error-report.h"
-#include "module_block.h"
+#include "block/module_block.h"
#include "qemu/main-loop.h"
#include "qemu/module.h"
#include "qapi/error.h"
{
static const char *whitelist_rw[] = {
CONFIG_BDRV_RW_WHITELIST
+ NULL
};
static const char *whitelist_ro[] = {
CONFIG_BDRV_RO_WHITELIST
+ NULL
};
const char **p;
}
ret = bdrv_change_backing_file(parent, filename,
- base->drv ? base->drv->format_name : "");
+ base->drv ? base->drv->format_name : "",
+ false);
if (ret < 0) {
error_setg_errno(errp, -ret, "Could not update backing file link");
}
assert(options != NULL && bs->options != options);
opts = qemu_opts_create(&bdrv_runtime_opts, NULL, 0, &error_abort);
- if (!qemu_opts_absorb_qdict(opts, options, &local_err)) {
- error_propagate(errp, local_err);
+ if (!qemu_opts_absorb_qdict(opts, options, errp)) {
ret = -EINVAL;
goto fail_opts;
}
return -EPERM;
}
+ /*
+ * Unaligned requests will automatically be aligned to bl.request_alignment
+ * and without RESIZE we can't extend requests to write to space beyond the
+ * end of the image, so it's required that the image size is aligned.
+ */
+ if ((cumulative_perms & (BLK_PERM_WRITE | BLK_PERM_WRITE_UNCHANGED)) &&
+ !(cumulative_perms & BLK_PERM_RESIZE))
+ {
+ if ((bs->total_sectors * BDRV_SECTOR_SIZE) % bs->bl.request_alignment) {
+ error_setg(errp, "Cannot get 'write' permission without 'resize': "
+ "Image size is not a multiple of request "
+ "alignment");
+ return -EPERM;
+ }
+ }
+
/* Check this node */
if (!drv) {
return 0;
/* Process generic block layer options */
opts = qemu_opts_create(&bdrv_runtime_opts, NULL, 0, &error_abort);
- if (!qemu_opts_absorb_qdict(opts, reopen_state->options, &local_err)) {
- error_propagate(errp, local_err);
+ if (!qemu_opts_absorb_qdict(opts, reopen_state->options, errp)) {
ret = -EINVAL;
goto error;
}
* image file header
* -ENOTSUP - format driver doesn't support changing the backing file
*/
-int bdrv_change_backing_file(BlockDriverState *bs,
- const char *backing_file, const char *backing_fmt)
+int bdrv_change_backing_file(BlockDriverState *bs, const char *backing_file,
+ const char *backing_fmt, bool warn)
{
BlockDriver *drv = bs->drv;
int ret;
return -EINVAL;
}
+ if (warn && backing_file && !backing_fmt) {
+ warn_report("Deprecated use of backing file without explicit "
+ "backing format, use of this image requires "
+ "potentially unsafe format probing");
+ }
+
if (drv->bdrv_change_backing_file != NULL) {
ret = drv->bdrv_change_backing_file(bs, backing_file, backing_fmt);
} else {
if (bs->open_flags & BDRV_O_INACTIVE) {
bs->open_flags &= ~BDRV_O_INACTIVE;
bdrv_get_cumulative_perm(bs, &perm, &shared_perm);
- ret = bdrv_check_perm(bs, NULL, perm, shared_perm, NULL, NULL, &local_err);
+ ret = bdrv_check_perm(bs, NULL, perm, shared_perm, NULL, NULL, errp);
if (ret < 0) {
bs->open_flags |= BDRV_O_INACTIVE;
- error_propagate(errp, local_err);
return;
}
bdrv_set_perm(bs, perm, shared_perm);
/* Parse -o options */
if (options) {
- if (!qemu_opts_do_parse(opts, options, NULL, &local_err)) {
+ if (!qemu_opts_do_parse(opts, options, NULL, errp)) {
goto out;
}
}
bs = bdrv_open(full_backing, NULL, backing_options, back_flags,
&local_err);
g_free(full_backing);
- if (!bs && size != -1) {
- /* Couldn't open BS, but we have a size, so it's nonfatal */
- warn_reportf_err(local_err,
- "Could not verify backing image. "
- "This may become an error in future versions.\n");
- local_err = NULL;
- } else if (!bs) {
- /* Couldn't open bs, do not have size */
- error_append_hint(&local_err,
- "Could not open backing image to determine size.\n");
+ if (!bs) {
+ error_append_hint(&local_err, "Could not open backing image.\n");
goto out;
} else {
+ if (!backing_fmt) {
+ warn_report("Deprecated use of backing file without explicit "
+ "backing format (detected format of %s)",
+ bs->drv->format_name);
+ if (bs->drv != &bdrv_raw) {
+ /*
+ * A probe of raw deserves the most attention:
+ * leaving the backing format out of the image
+ * will ensure bs->probed is set (ensuring we
+ * don't accidentally commit into the backing
+ * file), and allow more spots to warn the users
+ * to fix their toolchain when opening this image
+ * later. For other images, we can safely record
+ * the format that we probed.
+ */
+ backing_fmt = bs->drv->format_name;
+ qemu_opt_set(opts, BLOCK_OPT_BACKING_FMT, backing_fmt,
+ NULL);
+ }
+ }
if (size == -1) {
/* Opened BS, have no size */
size = bdrv_getlength(bs);
}
bdrv_unref(bs);
}
- } /* (backing_file && !(flags & BDRV_O_NO_BACKING)) */
+ /* (backing_file && !(flags & BDRV_O_NO_BACKING)) */
+ } else if (backing_file && !backing_fmt) {
+ warn_report("Deprecated use of unopened backing file without "
+ "explicit backing format, use of this image requires "
+ "potentially unsafe format probing");
+ }
if (size == -1) {
error_setg(errp, "Image creation needs a size parameter");
printf("Formatting '%s', fmt=%s ", filename, fmt);
qemu_opts_print(opts, " ");
puts("");
+ fflush(stdout);
}
ret = bdrv_create(drv, filename, opts, &local_err);
projects / mirror_qemu.git / blobdiff