This new FUSE_INIT field communicates the alignment constraint for
FUSE_SETUPMAPPING/FUSE_REMOVEMAPPING.
This feature will be implemented in the next commit.
Signed-off-by: Stefan Hajnoczi <stefa...@redhat.com>
---
contrib/virtiofsd/fuse_kernel.h | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/contrib/virtiofsd/fuse_kernel.h b/contrib/virtiofsd/fuse_kernel.h
index 7722e0ac23..550fc3cb64 100644
--- a/contrib/virtiofsd/fuse_kernel.h
+++ b/contrib/virtiofsd/fuse_kernel.h
@@ -263,6 +263,9 @@ struct fuse_file_lock {
* FUSE_MAX_PAGES: init_out.max_pages contains the max number of req pages
* FUSE_CACHE_SYMLINKS: cache READLINK responses
* FUSE_NO_OPENDIR_SUPPORT: kernel supports zero-message opendir
+ * FUSE_MAP_ALIGNMENT: init_out.map_alignment contains byte alignment for
+ * foffset and moffset fields in struct
+ * fuse_setupmapping_out and fuse_removemapping_one.
*/
#define FUSE_ASYNC_READ (1 << 0)
#define FUSE_POSIX_LOCKS (1 << 1)
@@ -289,6 +292,7 @@ struct fuse_file_lock {
#define FUSE_MAX_PAGES (1 << 22)
#define FUSE_CACHE_SYMLINKS (1 << 23)
#define FUSE_NO_OPENDIR_SUPPORT (1 << 24)
+#define FUSE_MAP_ALIGNMENT (1 << 25)
/**
* CUSE INIT request/reply flags
@@ -637,7 +641,8 @@ struct fuse_init_out {
uint32_t time_gran;
uint16_t max_pages;
uint16_t padding;
- uint32_t unused[8];
+ uint32_t map_alignment;
+ uint32_t unused[7];
};
#define CUSE_INIT_INFO_MAX 4096
--
2.21.0
