[Qemu-devel] [PATCH v5 03/45] qemu_ram_foreach_block: pass up error value, and down the ramblock name

["Dr. David Alan Gilbert (git)" <dgilbert@redhat.com>]

From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

check the return value of the function it calls and error if it's non-0
Fixup qemu_rdma_init_one_block that is the only current caller,
  and __qemu_rdma_add_block the only function it calls using it.

Pass the name of the ramblock to the function; helps in debugging.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
---
 exec.c                    | 10 ++++++++--
 include/exec/cpu-common.h |  4 ++--
 migration/rdma.c          |  4 ++--
 3 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/exec.c b/exec.c
index 6dff7bc..018b07a 100644
--- a/exec.c
+++ b/exec.c
@@ -2944,12 +2944,18 @@ bool cpu_physical_memory_is_io(hwaddr phys_addr)
              memory_region_is_romd(mr));
 }
 
-void qemu_ram_foreach_block(RAMBlockIterFunc func, void *opaque)
+int qemu_ram_foreach_block(RAMBlockIterFunc func, void *opaque)
 {
     RAMBlock *block;
+    int ret;
 
     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
-        func(block->host, block->offset, block->used_length, opaque);
+        ret = func(block->idstr, block->host, block->offset,
+                   block->used_length, opaque);
+        if (ret) {
+            return ret;
+        }
     }
+    return 0;
 }
 #endif
diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h
index 427b851..a31300c 100644
--- a/include/exec/cpu-common.h
+++ b/include/exec/cpu-common.h
@@ -124,10 +124,10 @@ void cpu_flush_icache_range(hwaddr start, int len);
 extern struct MemoryRegion io_mem_rom;
 extern struct MemoryRegion io_mem_notdirty;
 
-typedef void (RAMBlockIterFunc)(void *host_addr,
+typedef int (RAMBlockIterFunc)(const char *block_name, void *host_addr,
     ram_addr_t offset, ram_addr_t length, void *opaque);
 
-void qemu_ram_foreach_block(RAMBlockIterFunc func, void *opaque);
+int qemu_ram_foreach_block(RAMBlockIterFunc func, void *opaque);
 
 #endif
 
diff --git a/migration/rdma.c b/migration/rdma.c
index 6bee30c..d5cb6b7 100644
--- a/migration/rdma.c
+++ b/migration/rdma.c
@@ -569,10 +569,10 @@ static int __qemu_rdma_add_block(RDMAContext *rdma, void *host_addr,
  * in advanced before the migration starts. This tells us where the RAM blocks
  * are so that we can register them individually.
  */
-static void qemu_rdma_init_one_block(void *host_addr,
+static int qemu_rdma_init_one_block(const char *block_name, void *host_addr,
     ram_addr_t block_offset, ram_addr_t length, void *opaque)
 {
-    __qemu_rdma_add_block(opaque, host_addr, block_offset, length);
+    return __qemu_rdma_add_block(opaque, host_addr, block_offset, length);
 }
 
 /*
-- 
2.1.0