Merge branch 'for-linus' of ssh://master.kernel.org/pub/scm/linux/kernel/git/ieee1394...

[linux-2.6-omap-h63xx.git] / include / linux / nfsd / nfsfh.h

diff --git a/include/linux/nfsd/nfsfh.h b/include/linux/nfsd/nfsfh.h
index d9c6c382165dd23165d025ae4cd044db9dcf7f8b..11e568ee0eeb877b69ea1e78f320f203bffb6a39 100644 (file)
--- a/include/linux/nfsd/nfsfh.h
+++ b/include/linux/nfsd/nfsfh.h
@@ -165,38 +165,91 @@ typedef struct svc_fh {
 
 } svc_fh;
 
-static inline void mk_fsid_v0(u32 *fsidv, dev_t dev, ino_t ino)
-{
-       fsidv[0] = htonl((MAJOR(dev)<<16) |
-                       MINOR(dev));
-       fsidv[1] = ino_t_to_u32(ino);
-}
+enum nfsd_fsid {
+       FSID_DEV = 0,
+       FSID_NUM,
+       FSID_MAJOR_MINOR,
+       FSID_ENCODE_DEV,
+       FSID_UUID4_INUM,
+       FSID_UUID8,
+       FSID_UUID16,
+       FSID_UUID16_INUM,
+};
 
-static inline void mk_fsid_v1(u32 *fsidv, u32 fsid)
-{
-       fsidv[0] = fsid;
-}
+enum fsid_source {
+       FSIDSOURCE_DEV,
+       FSIDSOURCE_FSID,
+       FSIDSOURCE_UUID,
+};
+extern enum fsid_source fsid_source(struct svc_fh *fhp);
 
-static inline void mk_fsid_v2(u32 *fsidv, dev_t dev, ino_t ino)
-{
-       fsidv[0] = htonl(MAJOR(dev));
-       fsidv[1] = htonl(MINOR(dev));
-       fsidv[2] = ino_t_to_u32(ino);
-}
 
-static inline void mk_fsid_v3(u32 *fsidv, dev_t dev, ino_t ino)
+/* This might look a little large to "inline" but in all calls except
+ * one, 'vers' is constant so moste of the function disappears.
+ */
+static inline void mk_fsid(int vers, u32 *fsidv, dev_t dev, ino_t ino,
+                          u32 fsid, unsigned char *uuid)
 {
-       fsidv[0] = new_encode_dev(dev);
-       fsidv[1] = ino_t_to_u32(ino);
+       u32 *up;
+       switch(vers) {
+       case FSID_DEV:
+               fsidv[0] = htonl((MAJOR(dev)<<16) |
+                                MINOR(dev));
+               fsidv[1] = ino_t_to_u32(ino);
+               break;
+       case FSID_NUM:
+               fsidv[0] = fsid;
+               break;
+       case FSID_MAJOR_MINOR:
+               fsidv[0] = htonl(MAJOR(dev));
+               fsidv[1] = htonl(MINOR(dev));
+               fsidv[2] = ino_t_to_u32(ino);
+               break;
+
+       case FSID_ENCODE_DEV:
+               fsidv[0] = new_encode_dev(dev);
+               fsidv[1] = ino_t_to_u32(ino);
+               break;
+
+       case FSID_UUID4_INUM:
+               /* 4 byte fsid and inode number */
+               up = (u32*)uuid;
+               fsidv[0] = ino_t_to_u32(ino);
+               fsidv[1] = up[0] ^ up[1] ^ up[2] ^ up[3];
+               break;
+
+       case FSID_UUID8:
+               /* 8 byte fsid  */
+               up = (u32*)uuid;
+               fsidv[0] = up[0] ^ up[2];
+               fsidv[1] = up[1] ^ up[3];
+               break;
+
+       case FSID_UUID16:
+               /* 16 byte fsid - NFSv3+ only */
+               memcpy(fsidv, uuid, 16);
+               break;
+
+       case FSID_UUID16_INUM:
+               /* 8 byte inode and 16 byte fsid */
+               *(u64*)fsidv = (u64)ino;
+               memcpy(fsidv+2, uuid, 16);
+               break;
+       default: BUG();
+       }
 }
 
 static inline int key_len(int type)
 {
        switch(type) {
-       case 0: return 8;
-       case 1: return 4;
-       case 2: return 12;
-       case 3: return 8;
+       case FSID_DEV:          return 8;
+       case FSID_NUM:          return 4;
+       case FSID_MAJOR_MINOR:  return 12;
+       case FSID_ENCODE_DEV:   return 8;
+       case FSID_UUID4_INUM:   return 8;
+       case FSID_UUID8:        return 8;
+       case FSID_UUID16:       return 16;
+       case FSID_UUID16_INUM:  return 24;
        default: return 0;
        }
 }