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authorAlessio Balsini <balsini@android.com>2021-01-25 15:30:51 +0000
committerMiklos Szeredi <mszeredi@redhat.com>2021-03-16 15:20:16 +0100
commitf8425c9396639cc462bcce44b1051f8b4e62fddb (patch)
tree69f35483555a347f8fb83e31f6ca8ebb8809fb30 /include
parent3f9b9efd82a84f27e95d0414f852caf1fa839e83 (diff)
fuse: 32-bit user space ioctl compat for fuse device
With a 64-bit kernel build the FUSE device cannot handle ioctl requests coming from 32-bit user space. This is due to the ioctl command translation that generates different command identifiers that thus cannot be used for direct comparisons without proper manipulation. Explicitly extract type and number from the ioctl command to enable 32-bit user space compatibility on 64-bit kernel builds. Signed-off-by: Alessio Balsini <balsini@android.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'include')
-rw-r--r--include/uapi/linux/fuse.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/uapi/linux/fuse.h b/include/uapi/linux/fuse.h
index 98ca64d1beb6..54442612c48b 100644
--- a/include/uapi/linux/fuse.h
+++ b/include/uapi/linux/fuse.h
@@ -903,7 +903,8 @@ struct fuse_notify_retrieve_in {
};
/* Device ioctls: */
-#define FUSE_DEV_IOC_CLONE _IOR(229, 0, uint32_t)
+#define FUSE_DEV_IOC_MAGIC 229
+#define FUSE_DEV_IOC_CLONE _IOR(FUSE_DEV_IOC_MAGIC, 0, uint32_t)
struct fuse_lseek_in {
uint64_t fh;