@@ -20,6 +20,9 @@
#include <sys/socket.h>
#include <sys/un.h>
#include <attr/xattr.h>
+#include <linux/fs.h>
+#include <linux/magic.h>
+#include <sys/ioctl.h>
struct handle_data {
int mountfd;
@@ -543,9 +546,26 @@ static int handle_unlinkat(FsContext *ctx, V9fsPath *dir,
return ret;
}
+static int handle_ioc_getversion(FsContext *ctx, V9fsPath *path, uint64_t *st_gen)
+{
+ int mode = 0600;
+ int fd, err;
+
+ fd = handle_open(ctx, path, mode);
+ if(fd < 0) {
+ return fd;
+ }
+ err = ioctl(fd, FS_IOC_GETVERSION, st_gen);
+ handle_close(ctx, fd);
+ return err;
+}
+
+/* XFS_SUPER_MAGIC not available in linux/fs.h */
+#define XFS_SUPER_MAGIC 0x58465342
static int handle_init(FsContext *ctx)
{
int ret, mnt_id;
+ struct statfs stbuf;
struct file_handle fh;
struct handle_data *data = qemu_malloc(sizeof(struct handle_data));
data->mountfd = open(ctx->fs_root, O_DIRECTORY);
@@ -553,6 +573,17 @@ static int handle_init(FsContext *ctx)
ret = data->mountfd;
goto err_out;
}
+ ret = statfs(ctx->fs_root, &stbuf);
+ if(!ret) {
+ switch (stbuf.f_type) {
+ case EXT4_SUPER_MAGIC: /* same magic val for ext2/3 */
+ case BTRFS_SUPER_MAGIC:
+ case REISERFS_SUPER_MAGIC:
+ case XFS_SUPER_MAGIC:
+ ctx->exops.get_st_gen = handle_ioc_getversion;
+ break;
+ }
+ }
memset(&fh, 0, sizeof(struct file_handle));
ret = name_to_handle(data->mountfd, ".", &fh, &mnt_id, 0);
if (ret && errno == EOVERFLOW) {
v2: - close fd after use in handle_ioc_getversion Signed-off-by: Harsh Prateek Bora <harsh@linux.vnet.ibm.com> --- hw/9pfs/virtio-9p-handle.c | 31 +++++++++++++++++++++++++++++++ 1 files changed, 31 insertions(+), 0 deletions(-)