[PATCH] FUSE - read-only operations

This patch adds the read-only filesystem operations of FUSE.

This contains the following files:

 o dir.c
    - directory, symlink and file-inode operations

The following operations are added:

 o lookup
 o getattr
 o readlink
 o follow_link
 o directory open
 o readdir
 o directory release
 o permission
 o dentry revalidate
 o statfs

Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 60 insertions, 0 deletions

diff --git a/include/linux/fuse.h b/include/linux/fuse.h
index a1aebd7104c4..21b9ba16f8d5 100644
--- a/include/linux/fuse.h
+++ b/include/linux/fuse.h
@@ -42,13 +42,61 @@ struct fuse_attr {
         __u32   rdev;
 };
 
+struct fuse_kstatfs {
+        __u64   blocks;
+        __u64   bfree;
+        __u64   bavail;
+        __u64   files;
+        __u64   ffree;
+        __u32   bsize;
+        __u32   namelen;
+};
+
 enum fuse_opcode {
+        FUSE_LOOKUP        = 1,
+        FUSE_FORGET        = 2,  /* no reply */
+        FUSE_GETATTR       = 3,
+        FUSE_READLINK      = 5,
+        FUSE_GETDIR        = 7,
+        FUSE_STATFS        = 17,
         FUSE_INIT          = 26
 };
 
 /* Conservative buffer size for the client */
 #define FUSE_MAX_IN 8192
 
+#define FUSE_NAME_MAX 1024
+
+struct fuse_entry_out {
+        __u64   nodeid;         /* Inode ID */
+        __u64   generation;     /* Inode generation: nodeid:gen must
+                                   be unique for the fs's lifetime */
+        __u64   entry_valid;    /* Cache timeout for the name */
+        __u64   attr_valid;     /* Cache timeout for the attributes */
+        __u32   entry_valid_nsec;
+        __u32   attr_valid_nsec;
+        struct fuse_attr attr;
+};
+
+struct fuse_forget_in {
+        __u64   version;
+};
+
+struct fuse_attr_out {
+        __u64   attr_valid;     /* Cache timeout for the attributes */
+        __u32   attr_valid_nsec;
+        __u32   dummy;
+        struct fuse_attr attr;
+};
+
+struct fuse_getdir_out {
+        __u32   fd;
+};
+
+struct fuse_statfs_out {
+        struct fuse_kstatfs st;
+};
+
 struct fuse_init_in_out {
         __u32   major;
         __u32   minor;
@@ -70,3 +118,15 @@ struct fuse_out_header {
         __u64   unique;
 };
 
+struct fuse_dirent {
+        __u64   ino;
+        __u64   off;
+        __u32   namelen;
+        __u32   type;
+        char name[0];
+};
+
+#define FUSE_NAME_OFFSET ((unsigned) ((struct fuse_dirent *) 0)->name)
+#define FUSE_DIRENT_ALIGN(x) (((x) + sizeof(__u64) - 1) & ~(sizeof(__u64) - 1))
+#define FUSE_DIRENT_SIZE(d) \
+        FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)