diff options
Diffstat (limited to 'hw/9pfs/virtio-9p-local.c')
| -rw-r--r-- | hw/9pfs/virtio-9p-local.c | 54 |
1 files changed, 53 insertions, 1 deletions
diff --git a/hw/9pfs/virtio-9p-local.c b/hw/9pfs/virtio-9p-local.c index 47295b7e27..ad2d84153f 100644 --- a/hw/9pfs/virtio-9p-local.c +++ b/hw/9pfs/virtio-9p-local.c @@ -20,6 +20,24 @@ #include <sys/socket.h> #include <sys/un.h> #include <attr/xattr.h> +#include <linux/fs.h> +#ifdef CONFIG_LINUX_MAGIC_H +#include <linux/magic.h> +#endif +#include <sys/ioctl.h> + +#ifndef XFS_SUPER_MAGIC +#define XFS_SUPER_MAGIC 0x58465342 +#endif +#ifndef EXT2_SUPER_MAGIC +#define EXT2_SUPER_MAGIC 0xEF53 +#endif +#ifndef REISERFS_SUPER_MAGIC +#define REISERFS_SUPER_MAGIC 0x52654973 +#endif +#ifndef BTRFS_SUPER_MAGIC +#define BTRFS_SUPER_MAGIC 0x9123683E +#endif static int local_lstat(FsContext *fs_ctx, V9fsPath *fs_path, struct stat *stbuf) { @@ -659,10 +677,44 @@ static int local_unlinkat(FsContext *ctx, V9fsPath *dir, return ret; } +static int local_ioc_getversion(FsContext *ctx, V9fsPath *path, + mode_t st_mode, uint64_t *st_gen) +{ + int err, fd; + /* + * Do not try to open special files like device nodes, fifos etc + * We can get fd for regular files and directories only + */ + if (!S_ISREG(st_mode) && !S_ISDIR(st_mode)) { + return 0; + } + fd = local_open(ctx, path, O_RDONLY); + if (fd < 0) { + return fd; + } + err = ioctl(fd, FS_IOC_GETVERSION, st_gen); + local_close(ctx, fd); + return err; +} + static int local_init(FsContext *ctx) { + int err; + struct statfs stbuf; + ctx->flags |= PATHNAME_FSCONTEXT; - return 0; + err = statfs(ctx->fs_root, &stbuf); + if (!err) { + switch (stbuf.f_type) { + case EXT2_SUPER_MAGIC: + case BTRFS_SUPER_MAGIC: + case REISERFS_SUPER_MAGIC: + case XFS_SUPER_MAGIC: + ctx->exops.get_st_gen = local_ioc_getversion; + break; + } + } + return err; } FileOperations local_ops = { |