diff options
Diffstat (limited to 'block.c')
| -rw-r--r-- | block.c | 142 |
1 files changed, 16 insertions, 126 deletions
@@ -536,9 +536,10 @@ BlockDriver *bdrv_probe_all(const uint8_t *buf, int buf_size, return drv; } -static int find_image_format(BlockDriverState *bs, const char *filename, +static int find_image_format(BdrvChild *file, const char *filename, BlockDriver **pdrv, Error **errp) { + BlockDriverState *bs = file->bs; BlockDriver *drv; uint8_t buf[BLOCK_PROBE_BUF_SIZE]; int ret = 0; @@ -549,7 +550,7 @@ static int find_image_format(BlockDriverState *bs, const char *filename, return ret; } - ret = bdrv_pread(bs, 0, buf, sizeof(buf)); + ret = bdrv_pread(file, 0, buf, sizeof(buf)); if (ret < 0) { error_setg_errno(errp, -ret, "Could not read image for determining its " "format"); @@ -937,7 +938,6 @@ static int bdrv_open_common(BlockDriverState *bs, BdrvChild *file, goto fail_opts; } - bs->request_alignment = drv->bdrv_co_preadv ? 1 : 512; bs->read_only = !(bs->open_flags & BDRV_O_RDWR); if (use_bdrv_whitelist && !bdrv_is_whitelisted(drv, bs->read_only)) { @@ -1017,7 +1017,7 @@ static int bdrv_open_common(BlockDriverState *bs, BdrvChild *file, assert(bdrv_opt_mem_align(bs) != 0); assert(bdrv_min_mem_align(bs) != 0); - assert(is_power_of_2(bs->request_alignment) || bdrv_is_sg(bs)); + assert(is_power_of_2(bs->bl.request_alignment)); qemu_opts_del(opts); return 0; @@ -1653,7 +1653,7 @@ static BlockDriverState *bdrv_open_inherit(const char *filename, /* Image format probing */ bs->probed = !drv; if (!drv && file) { - ret = find_image_format(file->bs, filename, &drv, &local_err); + ret = find_image_format(file, filename, &drv, &local_err); if (ret < 0) { goto fail; } @@ -2184,9 +2184,9 @@ static void bdrv_close(BlockDriverState *bs) bs->backing_file[0] = '\0'; bs->backing_format[0] = '\0'; bs->total_sectors = 0; - bs->encrypted = 0; - bs->valid_key = 0; - bs->sg = 0; + bs->encrypted = false; + bs->valid_key = false; + bs->sg = false; QDECREF(bs->options); QDECREF(bs->explicit_options); bs->options = NULL; @@ -2323,116 +2323,6 @@ int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res, BdrvCheckMode fix) return bs->drv->bdrv_check(bs, res, fix); } -#define COMMIT_BUF_SECTORS 2048 - -/* commit COW file into the raw image */ -int bdrv_commit(BlockDriverState *bs) -{ - BlockDriver *drv = bs->drv; - int64_t sector, total_sectors, length, backing_length; - int n, ro, open_flags; - int ret = 0; - uint8_t *buf = NULL; - - if (!drv) - return -ENOMEDIUM; - - if (!bs->backing) { - return -ENOTSUP; - } - - if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_COMMIT_SOURCE, NULL) || - bdrv_op_is_blocked(bs->backing->bs, BLOCK_OP_TYPE_COMMIT_TARGET, NULL)) { - return -EBUSY; - } - - ro = bs->backing->bs->read_only; - open_flags = bs->backing->bs->open_flags; - - if (ro) { - if (bdrv_reopen(bs->backing->bs, open_flags | BDRV_O_RDWR, NULL)) { - return -EACCES; - } - } - - length = bdrv_getlength(bs); - if (length < 0) { - ret = length; - goto ro_cleanup; - } - - backing_length = bdrv_getlength(bs->backing->bs); - if (backing_length < 0) { - ret = backing_length; - goto ro_cleanup; - } - - /* If our top snapshot is larger than the backing file image, - * grow the backing file image if possible. If not possible, - * we must return an error */ - if (length > backing_length) { - ret = bdrv_truncate(bs->backing->bs, length); - if (ret < 0) { - goto ro_cleanup; - } - } - - total_sectors = length >> BDRV_SECTOR_BITS; - - /* qemu_try_blockalign() for bs will choose an alignment that works for - * bs->backing->bs as well, so no need to compare the alignment manually. */ - buf = qemu_try_blockalign(bs, COMMIT_BUF_SECTORS * BDRV_SECTOR_SIZE); - if (buf == NULL) { - ret = -ENOMEM; - goto ro_cleanup; - } - - for (sector = 0; sector < total_sectors; sector += n) { - ret = bdrv_is_allocated(bs, sector, COMMIT_BUF_SECTORS, &n); - if (ret < 0) { - goto ro_cleanup; - } - if (ret) { - ret = bdrv_read(bs, sector, buf, n); - if (ret < 0) { - goto ro_cleanup; - } - - ret = bdrv_write(bs->backing->bs, sector, buf, n); - if (ret < 0) { - goto ro_cleanup; - } - } - } - - if (drv->bdrv_make_empty) { - ret = drv->bdrv_make_empty(bs); - if (ret < 0) { - goto ro_cleanup; - } - bdrv_flush(bs); - } - - /* - * Make sure all data we wrote to the backing device is actually - * stable on disk. - */ - if (bs->backing) { - bdrv_flush(bs->backing->bs); - } - - ret = 0; -ro_cleanup: - qemu_vfree(buf); - - if (ro) { - /* ignoring error return here */ - bdrv_reopen(bs->backing->bs, open_flags & ~BDRV_O_RDWR, NULL); - } - - return ret; -} - /* * Return values: * 0 - success @@ -2644,30 +2534,30 @@ void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr) *nb_sectors_ptr = nb_sectors < 0 ? 0 : nb_sectors; } -int bdrv_is_read_only(BlockDriverState *bs) +bool bdrv_is_read_only(BlockDriverState *bs) { return bs->read_only; } -int bdrv_is_sg(BlockDriverState *bs) +bool bdrv_is_sg(BlockDriverState *bs) { return bs->sg; } -int bdrv_is_encrypted(BlockDriverState *bs) +bool bdrv_is_encrypted(BlockDriverState *bs) { if (bs->backing && bs->backing->bs->encrypted) { - return 1; + return true; } return bs->encrypted; } -int bdrv_key_required(BlockDriverState *bs) +bool bdrv_key_required(BlockDriverState *bs) { BdrvChild *backing = bs->backing; if (backing && backing->bs->encrypted && !backing->bs->valid_key) { - return 1; + return true; } return (bs->encrypted && !bs->valid_key); } @@ -2689,10 +2579,10 @@ int bdrv_set_key(BlockDriverState *bs, const char *key) } ret = bs->drv->bdrv_set_key(bs, key); if (ret < 0) { - bs->valid_key = 0; + bs->valid_key = false; } else if (!bs->valid_key) { /* call the change callback now, we skipped it on open */ - bs->valid_key = 1; + bs->valid_key = true; bdrv_parent_cb_change_media(bs, true); } return ret; |