diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/export/export.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/block/export/export.c b/block/export/export.c index 657bb58..f2c00d1 100644 --- a/block/export/export.c +++ b/block/export/export.c @@ -62,6 +62,7 @@ BlockExport *blk_exp_add(BlockExportOptions *export, Error **errp) BlockDriverState *bs; BlockBackend *blk; AioContext *ctx; + uint64_t perm; int ret; if (!id_wellformed(export->id)) { @@ -84,6 +85,14 @@ BlockExport *blk_exp_add(BlockExportOptions *export, Error **errp) return NULL; } + if (!export->has_writable) { + export->writable = false; + } + if (bdrv_is_read_only(bs) && export->writable) { + error_setg(errp, "Cannot export read-only node as writable"); + return NULL; + } + ctx = bdrv_get_aio_context(bs); aio_context_acquire(ctx); @@ -95,7 +104,12 @@ BlockExport *blk_exp_add(BlockExportOptions *export, Error **errp) */ bdrv_invalidate_cache(bs, NULL); - blk = blk_new(ctx, BLK_PERM_CONSISTENT_READ, BLK_PERM_ALL); + perm = BLK_PERM_CONSISTENT_READ; + if (export->writable) { + perm |= BLK_PERM_WRITE; + } + + blk = blk_new(ctx, perm, BLK_PERM_ALL); ret = blk_insert_bs(blk, bs, errp); if (ret < 0) { goto fail; |