util-vserver-0.30.208

[util-vserver.git] / kernel / xid.h

diff --git a/kernel/xid.h b/kernel/xid.h
new file mode 100644 (file)
index 0000000..4848951
--- /dev/null
+++ b/kernel/xid.h
@@ -0,0 +1,145 @@
+#ifndef _VX_XID_H
+#define _VX_XID_H
+
+#ifndef        CONFIG_VSERVER
+#warning config options missing
+#endif
+
+#define XID_TAG_SB(sb) (sb->s_flags & MS_TAGXID)
+
+#define XID_TAG(in)    (!(in) || \
+       (((struct inode *)in)->i_sb && \
+       XID_TAG_SB(((struct inode *)in)->i_sb)))
+
+
+#ifdef CONFIG_XID_TAG_NFSD
+#define        XID_TAG_NFSD    1
+#else
+#define        XID_TAG_NFSD    0
+#endif
+
+
+#ifdef CONFIG_INOXID_NONE
+
+#define MAX_UID                0xFFFFFFFF
+#define MAX_GID                0xFFFFFFFF
+
+#define INOXID_XID(tag, uid, gid, xid) (0)
+
+#define XIDINO_UID(tag, uid, xid)      (uid)
+#define XIDINO_GID(tag, gid, xid)      (gid)
+
+#endif
+
+
+#ifdef CONFIG_INOXID_GID16
+
+#define MAX_UID                0xFFFFFFFF
+#define MAX_GID                0x0000FFFF
+
+#define INOXID_XID(tag, uid, gid, xid) \
+       ((tag) ? (((gid) >> 16) & 0xFFFF) : 0)
+
+#define XIDINO_UID(tag, uid, xid)      (uid)
+#define XIDINO_GID(tag, gid, xid)      \
+       ((tag) ? (((gid) & 0xFFFF) | ((xid) << 16)) : (gid))
+
+#endif
+
+
+#ifdef CONFIG_INOXID_UGID24
+
+#define MAX_UID                0x00FFFFFF
+#define MAX_GID                0x00FFFFFF
+
+#define INOXID_XID(tag, uid, gid, xid) \
+       ((tag) ? ((((uid) >> 16) & 0xFF00) | (((gid) >> 24) & 0xFF)) : 0)
+
+#define XIDINO_UID(tag, uid, xid)      \
+       ((tag) ? (((uid) & 0xFFFFFF) | (((xid) & 0xFF00) << 16)) : (uid))
+#define XIDINO_GID(tag, gid, xid)      \
+       ((tag) ? (((gid) & 0xFFFFFF) | (((xid) & 0x00FF) << 24)) : (gid))
+
+#endif
+
+
+#ifdef CONFIG_INOXID_UID16
+
+#define MAX_UID                0x0000FFFF
+#define MAX_GID                0xFFFFFFFF
+
+#define INOXID_XID(tag, uid, gid, xid) \
+       ((tag) ? (((uid) >> 16) & 0xFFFF) : 0)
+
+#define XIDINO_UID(tag, uid, xid)      \
+       ((tag) ? (((uid) & 0xFFFF) | ((xid) << 16)) : (uid))
+#define XIDINO_GID(tag, gid, xid)      (gid)
+
+#endif
+
+
+#ifdef CONFIG_INOXID_INTERN
+
+#define MAX_UID                0xFFFFFFFF
+#define MAX_GID                0xFFFFFFFF
+
+#define INOXID_XID(tag, uid, gid, xid) \
+       ((tag) ? (xid) : 0)
+
+#define XIDINO_UID(tag, uid, xid)      (uid)
+#define XIDINO_GID(tag, gid, xid)      (gid)
+
+#endif
+
+
+#ifdef CONFIG_INOXID_RUNTIME
+
+#define MAX_UID                0xFFFFFFFF
+#define MAX_GID                0xFFFFFFFF
+
+#define INOXID_XID(tag, uid, gid, xid) (0)
+
+#define XIDINO_UID(tag, uid, xid)      (uid)
+#define XIDINO_GID(tag, gid, xid)      (gid)
+
+#endif
+
+
+#ifdef CONFIG_INOXID_NONE
+#define vx_current_fsxid(sb)   (0)
+#else
+#define vx_current_fsxid(sb)   \
+       (XID_TAG_SB(sb) ? current->xid : 0)
+#endif
+
+#define INOXID_UID(tag, uid, gid)      \
+       ((tag) ? ((uid) & MAX_UID) : (uid))
+#define INOXID_GID(tag, uid, gid)      \
+       ((tag) ? ((gid) & MAX_GID) : (gid))
+
+
+static inline uid_t vx_map_uid(uid_t uid)
+{
+       if ((uid > MAX_UID) && (uid != -1))
+               uid = -2;
+       return (uid & MAX_UID);
+}
+
+static inline gid_t vx_map_gid(gid_t gid)
+{
+       if ((gid > MAX_GID) && (gid != -1))
+               gid = -2;
+       return (gid & MAX_GID);
+}
+
+
+#ifdef CONFIG_VSERVER_LEGACY
+#define FIOC_GETXID    _IOR('x', 1, long)
+#define FIOC_SETXID    _IOW('x', 2, long)
+#define FIOC_SETXIDJ   _IOW('x', 3, long)
+#endif
+
+int vx_parse_xid(char *string, xid_t *xid, int remove);
+void vx_propagate_xid(struct nameidata *nd, struct inode *inode);
+
+#endif /* _VX_XID_H */