if (length < 0) {
return length;
}
- hint = length >> BDRV_SECTOR_BITS;
+ hint = DIV_ROUND_UP(length, BDRV_SECTOR_SIZE);
}
bs->total_sectors = hint;
bs->read_only = !(open_flags & BDRV_O_RDWR);
if (use_bdrv_whitelist && !bdrv_is_whitelisted(drv, bs->read_only)) {
- error_setg(errp, "Driver '%s' is not whitelisted", drv->format_name);
+ error_setg(errp,
+ !bs->read_only && bdrv_is_whitelisted(drv, true)
+ ? "Driver '%s' can only be used for read-only devices"
+ : "Driver '%s' is not whitelisted",
+ drv->format_name);
return -ENOTSUP;
}
assert(bs->copy_on_read == 0); /* bdrv_new() and bdrv_close() make it so */
- if (!bs->read_only && (flags & BDRV_O_COPY_ON_READ)) {
- bdrv_enable_copy_on_read(bs);
+ if (flags & BDRV_O_COPY_ON_READ) {
+ if (!bs->read_only) {
+ bdrv_enable_copy_on_read(bs);
+ } else {
+ error_setg(errp, "Can't use copy-on-read on read-only device");
+ return -EINVAL;
+ }
}
if (filename != NULL) {
/* Open the image, either directly or using a protocol */
if (drv->bdrv_file_open) {
assert(file == NULL);
- assert(drv->bdrv_parse_filename || filename != NULL);
+ assert(!drv->bdrv_needs_filename || filename != NULL);
ret = drv->bdrv_file_open(bs, options, open_flags, &local_err);
} else {
if (file == NULL) {
if (ret < 0) {
if (error_is_set(&local_err)) {
error_propagate(errp, local_err);
- } else if (filename) {
- error_setg_errno(errp, -ret, "Could not open '%s'", filename);
+ } else if (bs->filename[0]) {
+ error_setg_errno(errp, -ret, "Could not open '%s'", bs->filename);
} else {
error_setg_errno(errp, -ret, "Could not open image");
}
#ifndef _WIN32
if (bs->is_temporary) {
- assert(filename != NULL);
- unlink(filename);
+ assert(bs->filename[0] != '\0');
+ unlink(bs->filename);
}
#endif
return 0;
/* Find the right block driver */
drvname = qdict_get_try_str(options, "driver");
if (drvname) {
- drv = bdrv_find_whitelisted_format(drvname, !(flags & BDRV_O_RDWR));
+ drv = bdrv_find_format(drvname);
if (!drv) {
error_setg(errp, "Unknown driver '%s'", drvname);
}
goto fail;
}
qdict_del(options, "filename");
- } else if (!drv->bdrv_parse_filename && !filename) {
+ } else if (drv->bdrv_needs_filename && !filename) {
error_setg(errp, "The '%s' block driver requires a file name",
drv->format_name);
ret = -EINVAL;
} else if (bs->backing_file[0] == '\0' && qdict_size(options) == 0) {
QDECREF(options);
return 0;
+ } else {
+ bdrv_get_full_backing_filename(bs, backing_filename,
+ sizeof(backing_filename));
}
bs->backing_hd = bdrv_new("");
- bdrv_get_full_backing_filename(bs, backing_filename,
- sizeof(backing_filename));
if (bs->backing_format[0] != '\0') {
back_drv = bdrv_find_format(bs->backing_format);
}
/* backing files always opened read-only */
- back_flags = bs->open_flags & ~(BDRV_O_RDWR | BDRV_O_SNAPSHOT);
+ back_flags = bs->open_flags & ~(BDRV_O_RDWR | BDRV_O_SNAPSHOT |
+ BDRV_O_COPY_ON_READ);
ret = bdrv_open(bs->backing_hd,
*backing_filename ? backing_filename : NULL, options,
bdrv_unref(bs->backing_hd);
bs->backing_hd = NULL;
bs->open_flags |= BDRV_O_NO_BACKING;
- error_propagate(errp, local_err);
+ error_setg(errp, "Could not open backing file: %s",
+ error_get_pretty(local_err));
+ error_free(local_err);
return ret;
}
+ pstrcpy(bs->backing_file, sizeof(bs->backing_file),
+ bs->backing_hd->file->filename);
return 0;
}
-static void extract_subqdict(QDict *src, QDict **dst, const char *start)
-{
- const QDictEntry *entry, *next;
- const char *p;
-
- *dst = qdict_new();
- entry = qdict_first(src);
-
- while (entry != NULL) {
- next = qdict_next(src, entry);
- if (strstart(entry->key, start, &p)) {
- qobject_incref(entry->value);
- qdict_put_obj(*dst, p, entry->value);
- qdict_del(src, entry->key);
- }
- entry = next;
- }
-}
-
/*
* Opens a disk image (raw, qcow2, vmdk, ...)
*
snprintf(backing_filename, sizeof(backing_filename),
"%s", filename);
} else if (!realpath(filename, backing_filename)) {
- error_setg_errno(errp, errno, "Could not resolve path '%s'", filename);
ret = -errno;
+ error_setg_errno(errp, errno, "Could not resolve path '%s'", filename);
goto fail;
}
flags |= BDRV_O_ALLOW_RDWR;
}
- extract_subqdict(options, &file_options, "file.");
+ qdict_extract_subqdict(options, &file_options, "file.");
ret = bdrv_file_open(&file, filename, file_options,
bdrv_open_flags(bs, flags | BDRV_O_UNMAP), &local_err);
/* Find the right image format driver */
drvname = qdict_get_try_str(options, "driver");
if (drvname) {
- drv = bdrv_find_whitelisted_format(drvname, !(flags & BDRV_O_RDWR));
+ drv = bdrv_find_format(drvname);
qdict_del(options, "driver");
+ if (!drv) {
+ error_setg(errp, "Invalid driver: '%s'", drvname);
+ ret = -EINVAL;
+ goto unlink_and_fail;
+ }
}
if (!drv) {
if ((flags & BDRV_O_NO_BACKING) == 0) {
QDict *backing_options;
- extract_subqdict(options, &backing_options, "backing.");
+ qdict_extract_subqdict(options, &backing_options, "backing.");
ret = bdrv_open_backing_file(bs, backing_options, &local_err);
if (ret < 0) {
goto close_and_fail;
goto out;
}
- total_sectors = len >> BDRV_SECTOR_BITS;
+ total_sectors = DIV_ROUND_UP(len, BDRV_SECTOR_SIZE);
max_nb_sectors = MAX(0, total_sectors - sector_num);
if (max_nb_sectors > 0) {
ret = drv->bdrv_co_readv(bs, sector_num,
if (!drv)
return -ENOMEDIUM;
- if (bdrv_dev_has_removable_media(bs)) {
- if (drv->bdrv_getlength) {
- return drv->bdrv_getlength(bs);
+ if (drv->has_variable_length) {
+ int ret = refresh_total_sectors(bs, bs->total_sectors);
+ if (ret < 0) {
+ return ret;
}
}
return bs->total_sectors * BDRV_SECTOR_SIZE;
ret = bs->drv->bdrv_co_get_block_status(bs, sector_num, nb_sectors, pnum);
if (ret < 0) {
+ *pnum = 0;
return ret;
}
+ if (ret & BDRV_BLOCK_RAW) {
+ assert(ret & BDRV_BLOCK_OFFSET_VALID);
+ return bdrv_get_block_status(bs->file, ret >> BDRV_SECTOR_BITS,
+ *pnum, pnum);
+ }
+
if (!(ret & BDRV_BLOCK_DATA)) {
if (bdrv_has_zero_init(bs)) {
ret |= BDRV_BLOCK_ZERO;
- } else {
+ } else if (bs->backing_hd) {
BlockDriverState *bs2 = bs->backing_hd;
int64_t length2 = bdrv_getlength(bs2);
if (length2 >= 0 && sector_num >= (length2 >> BDRV_SECTOR_BITS)) {
return drv->bdrv_get_info(bs, bdi);
}
+ImageInfoSpecific *bdrv_get_specific_info(BlockDriverState *bs)
+{
+ BlockDriver *drv = bs->drv;
+ if (drv && drv->bdrv_get_specific_info) {
+ return drv->bdrv_get_specific_info(bs);
+ }
+ return NULL;
+}
+
int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf,
int64_t pos, int size)
{
}
return bs->drv->bdrv_amend_options(bs, options);
}
+
+ExtSnapshotPerm bdrv_check_ext_snapshot(BlockDriverState *bs)
+{
+ if (bs->drv->bdrv_check_ext_snapshot) {
+ return bs->drv->bdrv_check_ext_snapshot(bs);
+ }
+
+ if (bs->file && bs->file->drv && bs->file->drv->bdrv_check_ext_snapshot) {
+ return bs->file->drv->bdrv_check_ext_snapshot(bs);
+ }
+
+ /* external snapshots are allowed by default */
+ return EXT_SNAPSHOT_ALLOWED;
+}
+
+ExtSnapshotPerm bdrv_check_ext_snapshot_forbidden(BlockDriverState *bs)
+{
+ return EXT_SNAPSHOT_FORBIDDEN;
+}
projects / qemu.git / blobdiff