[Qemu-block] [PATCH v10 6/9] file-posix: support BDRV_REQ_ALLOCATE

[Anton Nefedov]

Current write_zeroes implementation is good enough to satisfy this flag too

Signed-off-by: Anton Nefedov <address@hidden>
---
 block/file-posix.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/block/file-posix.c b/block/file-posix.c
index 07bbdab953..b0b7ab0159 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -603,6 +603,7 @@ static int raw_open_common(BlockDriverState *bs, QDict 
*options,
         } else {
             s->discard_zeroes = true;
             s->has_fallocate = true;
+            bs->supported_zero_flags = BDRV_REQ_ALLOCATE;
         }
     } else {
         if (!(S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) {
@@ -646,10 +647,11 @@ static int raw_open_common(BlockDriverState *bs, QDict 
*options,
 #ifdef CONFIG_XFS
     if (platform_test_xfs_fd(s->fd)) {
         s->is_xfs = true;
+        bs->supported_zero_flags = BDRV_REQ_ALLOCATE;
     }
 #endif
 
-    bs->supported_zero_flags = BDRV_REQ_MAY_UNMAP;
+    bs->supported_zero_flags |= BDRV_REQ_MAY_UNMAP;
     ret = 0;
 fail:
     if (filename && (bdrv_flags & BDRV_O_TEMPORARY)) {
@@ -1520,6 +1522,10 @@ static ssize_t handle_aiocb_write_zeroes(RawPosixAIOData 
*aiocb)
         }
         s->has_fallocate = false;
     }
+
+    if (!s->has_fallocate) {
+        aiocb->bs->supported_zero_flags &= ~BDRV_REQ_ALLOCATE;
+    }
 #endif
 
     return -ENOTSUP;
-- 
2.17.1