> Am 10.09.2020 um 12:30 schrieb Yonggang Luo <[email protected]>:
>
> These compiling errors are fixed:
> ../block/nfs.c:27:10: fatal error: poll.h: No such file or directory
> 27 | #include <poll.h>
> | ^~~~~~~~
> compilation terminated.
>
> ../block/nfs.c:63:5: error: unknown type name 'blkcnt_t'
> 63 | blkcnt_t st_blocks;
> | ^~~~~~~~
> ../block/nfs.c: In function 'nfs_client_open':
> ../block/nfs.c:550:27: error: 'struct _stat64' has no member named 'st_blocks'
> 550 | client->st_blocks = st.st_blocks;
> | ^
> ../block/nfs.c: In function 'nfs_get_allocated_file_size':
> ../block/nfs.c:751:41: error: 'struct _stat64' has no member named 'st_blocks'
> 751 | return (task.ret < 0 ? task.ret : st.st_blocks * 512);
> | ^
> ../block/nfs.c: In function 'nfs_reopen_prepare':
> ../block/nfs.c:805:31: error: 'struct _stat64' has no member named 'st_blocks'
> 805 | client->st_blocks = st.st_blocks;
> | ^
> ../block/nfs.c: In function 'nfs_get_allocated_file_size':
> ../block/nfs.c:752:1: error: control reaches end of non-void function
> [-Werror=return-type]
> 752 | }
> | ^
>
> On msys2/mingw, there is no st_blocks in struct _stat64, so we use
> consistence st_size instead.
>
> Signed-off-by: Yonggang Luo <[email protected]>
> ---
> block/nfs.c | 32 +++++++++++++++++++++++++-------
> 1 file changed, 25 insertions(+), 7 deletions(-)
>
> diff --git a/block/nfs.c b/block/nfs.c
> index 61a249a9fc..db6d8c2d2b 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;
> @@ -415,11 +424,20 @@ 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);
> @@ -545,7 +563,7 @@ 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;
> @@ -729,7 +747,7 @@ 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)) {
> @@ -746,7 +764,7 @@ 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
> @@ -778,7 +796,7 @@ 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)) {
> @@ -800,7 +818,7 @@ 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;
> --
> 2.28.0.windows.1
You still implement nfs_get_allocated_file_size without actually returning the
allocated file size on WIN32.
I would simply do this:
diff --git a/block/nfs.c b/block/nfs.c
index 61a249a..0983143 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"
@@ -58,7 +60,9 @@ typedef struct NFSClient {
bool has_zero_init;
AioContext *aio_context;
QemuMutex mutex;
+#if !defined(_WIN32)
blkcnt_t st_blocks;
+#endif
bool cache_used;
NFSServer *server;
char *path;
@@ -545,7 +549,9 @@ static int64_t nfs_client_open(NFSClient *client,
BlockdevOptionsNfs *opts,
}
ret = DIV_ROUND_UP(st.st_size, BDRV_SECTOR_SIZE);
+#if !defined(_WIN32)
client->st_blocks = st.st_blocks;
+#endif
client->has_zero_init = S_ISREG(st.st_mode);
*strp = '/';
goto out;
@@ -706,6 +712,8 @@ static int nfs_has_zero_init(BlockDriverState *bs)
return client->has_zero_init;
}
+
+#if !defined(_WIN32)
/* Called (via nfs_service) with QemuMutex held. */
static void
nfs_get_allocated_file_size_cb(int ret, struct nfs_context *nfs, void *data,
@@ -748,6 +756,7 @@ static int64_t nfs_get_allocated_file_size(BlockDriverState
*bs)
return (task.ret < 0 ? task.ret : st.st_blocks * 512);
}
+#endif
static int coroutine_fn
nfs_file_co_truncate(BlockDriverState *bs, int64_t offset, bool exact,
@@ -792,6 +801,7 @@ static int nfs_reopen_prepare(BDRVReopenState *state,
return -EINVAL;
}
+#if !defined(_WIN32)
/* Update cache for read-only reopens */
if (!(state->flags & BDRV_O_RDWR)) {
ret = nfs_fstat(client->context, client->fh, &st);
@@ -802,6 +812,7 @@ static int nfs_reopen_prepare(BDRVReopenState *state,
}
client->st_blocks = st.st_blocks;
}
+#endif
return 0;
}
@@ -869,7 +880,9 @@ static BlockDriver bdrv_nfs = {
.create_opts = &nfs_create_opts,
.bdrv_has_zero_init = nfs_has_zero_init,
+#if !defined(_WIN32)
.bdrv_get_allocated_file_size = nfs_get_allocated_file_size,
+#endif
.bdrv_co_truncate = nfs_file_co_truncate,
.bdrv_file_open = nfs_file_open,
Best,
Peter
