Re: [PATCH v8 02/27] block: Fixes nfs compiling error on msys2/mingw

[Yonggang Luo]

How about using the following patch with 

+#if !defined (_WIN32)
     .bdrv_get_allocated_file_size   = nfs_get_allocated_file_size,
+#endif  

Also,

  +static blkcnt_t nfs_get_st_blocks(const struct nfs_stat *st)
+{
+#if defined(_WIN32)
+    return (st->st_size + 511) / 512;
+#else
+    return st->st_blocks;
+#endif
+} 

Change to be 

    +static blkcnt_t nfs_get_st_blocks(const struct nfs_stat *st)
+{
+#if defined(_WIN32)
+    return-1; /* TODO: unimplemented on win32 yet */
+#else
+    return st->st_blocks;
+#endif
+}   

 block/nfs.c | 32 +++++++++++++++++++++++++-------
 1 file changed, 25 insertions(+), 7 deletions(-)

diff --git a/block/nfs.c b/block/nfs.c
index cc2413d5ab..beebd566d1 100644
--- a/block/nfs.c
+++ b/block/nfs.c
@@ -24,7 +24,9 @@
 
 #include "qemu/osdep.h"
 
+#if !defined(_WIN32)
 #include <poll.h>
+#endif
 #include "qemu/config-file.h"
 #include "qemu/error-report.h"
 #include "qapi/error.h"
@@ -51,6 +53,13 @@
 #define QEMU_NFS_MAX_PAGECACHE_SIZE (8388608 / NFS_BLKSIZE)
 #define QEMU_NFS_MAX_DEBUG_LEVEL 2
 
+#if defined (_WIN32)
+#define nfs_stat __stat64
+typedef long long blkcnt_t;
+#else
+#define nfs_stat stat
+#endif
+
 typedef struct NFSClient {
     struct nfs_context *context;
     struct nfsfh *fh;
@@ -70,7 +79,7 @@ typedef struct NFSRPC {
     int ret;
     int complete;
     QEMUIOVector *iov;
-    struct stat *st;
+    struct nfs_stat *st;
     Coroutine *co;
     NFSClient *client;
 } NFSRPC;
@@ -418,11 +427,20 @@ static void nfs_file_close(BlockDriverState *bs)
     nfs_client_close(client);
 }
 
+static blkcnt_t nfs_get_st_blocks(const struct nfs_stat *st)
+{
+#if defined(_WIN32)
+    return (st->st_size + 511) / 512;
+#else
+    return st->st_blocks;
+#endif
+}
+
 static int64_t nfs_client_open(NFSClient *client, BlockdevOptionsNfs *opts,
                                int flags, int open_flags, Error **errp)
 {
     int64_t ret = -EINVAL;
-    struct stat st;
+    struct nfs_stat st;
     char *file = NULL, *strp = NULL;
 
     qemu_mutex_init(&client->mutex);
@@ -548,7 +566,7 @@ static int64_t nfs_client_open(NFSClient *client, BlockdevOptionsNfs *opts,
     }
 
     ret = DIV_ROUND_UP(st.st_size, BDRV_SECTOR_SIZE);
-    client->st_blocks = st.st_blocks;
+    client->st_blocks = nfs_get_st_blocks(&st);
     client->has_zero_init = S_ISREG(st.st_mode);
     *strp = '/';
     goto out;
@@ -733,7 +751,7 @@ static int64_t nfs_get_allocated_file_size(BlockDriverState *bs)
 {
     NFSClient *client = bs->opaque;
     NFSRPC task = {0};
-    struct stat st;
+    struct nfs_stat st;
 
     if (bdrv_is_read_only(bs) &&
         !(bs->open_flags & BDRV_O_NOCACHE)) {
@@ -750,7 +768,7 @@ static int64_t nfs_get_allocated_file_size(BlockDriverState *bs)
     nfs_set_events(client);
     BDRV_POLL_WHILE(bs, !task.complete);
 
-    return (task.ret < 0 ? task.ret : st.st_blocks * 512);
+    return (task.ret < 0 ? task.ret : nfs_get_st_blocks(&st) * 512);
 }
 
 static int coroutine_fn
@@ -781,7 +799,7 @@ static int nfs_reopen_prepare(BDRVReopenState *state,
                               BlockReopenQueue *queue, Error **errp)
 {
     NFSClient *client = state->bs->opaque;
-    struct stat st;
+    struct nfs_stat st;
     int ret = 0;
 
     if (state->flags & BDRV_O_RDWR && bdrv_is_read_only(state->bs)) {
@@ -803,7 +821,7 @@ static int nfs_reopen_prepare(BDRVReopenState *state,
                        nfs_get_error(client->context));
             return ret;
         }
-        client->st_blocks = st.st_blocks;
+        client->st_blocks = nfs_get_st_blocks(&st);
     }
 
     return 0;