diff options
| author | Vivek Goyal <vgoyal@redhat.com> | 2020-08-19 18:19:50 -0400 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2020-09-10 11:39:23 +0200 |
| commit | ceec02d4354a317cacce4b053a580ea3c7fc6cdc (patch) | |
| tree | 0ec35bd0329ccef520cdefc51b083a2275d14d19 /include/uapi/linux/fuse.h | |
| parent | fd1a1dc6f5aa7361e3562790336e116935f8fcfa (diff) | |
virtiofs: introduce setupmapping/removemapping commands
Introduce two new fuse commands to setup/remove memory mappings. This
will be used to setup/tear down file mapping in dax window.
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Peng Tao <tao.peng@linux.alibaba.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'include/uapi/linux/fuse.h')
| -rw-r--r-- | include/uapi/linux/fuse.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/include/uapi/linux/fuse.h b/include/uapi/linux/fuse.h index 5b85819e045f..60a7bfc787ce 100644 --- a/include/uapi/linux/fuse.h +++ b/include/uapi/linux/fuse.h @@ -894,4 +894,33 @@ struct fuse_copy_file_range_in { uint64_t flags; }; +#define FUSE_SETUPMAPPING_FLAG_WRITE (1ull << 0) +struct fuse_setupmapping_in { + /* An already open handle */ + uint64_t fh; + /* Offset into the file to start the mapping */ + uint64_t foffset; + /* Length of mapping required */ + uint64_t len; + /* Flags, FUSE_SETUPMAPPING_FLAG_* */ + uint64_t flags; + /* Offset in Memory Window */ + uint64_t moffset; +}; + +struct fuse_removemapping_in { + /* number of fuse_removemapping_one follows */ + uint32_t count; +}; + +struct fuse_removemapping_one { + /* Offset into the dax window start the unmapping */ + uint64_t moffset; + /* Length of mapping required */ + uint64_t len; +}; + +#define FUSE_REMOVEMAPPING_MAX_ENTRY \ + (PAGE_SIZE / sizeof(struct fuse_removemapping_one)) + #endif /* _LINUX_FUSE_H */ |