diff options
| -rw-r--r-- | softmmu/physmem.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/softmmu/physmem.c b/softmmu/physmem.c index 88482bd32a..c520c2ac55 100644 --- a/softmmu/physmem.c +++ b/softmmu/physmem.c @@ -3482,6 +3482,16 @@ int ram_block_discard_range(RAMBlock *rb, uint64_t start, size_t length) */ #ifdef CONFIG_FALLOCATE_PUNCH_HOLE /* + * fallocate() will fail with readonly files. Let's print a + * proper error message. + */ + if (rb->flags & RAM_READONLY_FD) { + error_report("ram_block_discard_range: Discarding RAM" + " with readonly files is not supported"); + goto err; + + } + /* * We'll discard data from the actual file, even though we only * have a MAP_PRIVATE mapping, possibly messing with other * MAP_PRIVATE/MAP_SHARED mappings. There is no easy way to |