This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / include / linux / vserver / tag.h

diff --git a/include/linux/vserver/tag.h b/include/linux/vserver/tag.h
new file mode 100644 (file)
index 0000000..f448070
--- /dev/null
+++ b/include/linux/vserver/tag.h
@@ -0,0 +1,140 @@
+#ifndef _DX_TAG_H
+#define _DX_TAG_H
+
+
+#define DX_TAG(in)     (IS_TAGGED(in))
+
+
+#ifdef CONFIG_DX_TAG_NFSD
+#define DX_TAG_NFSD    1
+#else
+#define DX_TAG_NFSD    0
+#endif
+
+
+#ifdef CONFIG_TAGGING_NONE
+
+#define MAX_UID                0xFFFFFFFF
+#define MAX_GID                0xFFFFFFFF
+
+#define INOTAG_TAG(cond, uid, gid, tag)        (0)
+
+#define TAGINO_UID(cond, uid, tag)     (uid)
+#define TAGINO_GID(cond, gid, tag)     (gid)
+
+#endif
+
+
+#ifdef CONFIG_TAGGING_GID16
+
+#define MAX_UID                0xFFFFFFFF
+#define MAX_GID                0x0000FFFF
+
+#define INOTAG_TAG(cond, uid, gid, tag)        \
+       ((cond) ? (((gid) >> 16) & 0xFFFF) : 0)
+
+#define TAGINO_UID(cond, uid, tag)     (uid)
+#define TAGINO_GID(cond, gid, tag)     \
+       ((cond) ? (((gid) & 0xFFFF) | ((tag) << 16)) : (gid))
+
+#endif
+
+
+#ifdef CONFIG_TAGGING_ID24
+
+#define MAX_UID                0x00FFFFFF
+#define MAX_GID                0x00FFFFFF
+
+#define INOTAG_TAG(cond, uid, gid, tag)        \
+       ((cond) ? ((((uid) >> 16) & 0xFF00) | (((gid) >> 24) & 0xFF)) : 0)
+
+#define TAGINO_UID(cond, uid, tag)     \
+       ((cond) ? (((uid) & 0xFFFFFF) | (((tag) & 0xFF00) << 16)) : (uid))
+#define TAGINO_GID(cond, gid, tag)     \
+       ((cond) ? (((gid) & 0xFFFFFF) | (((tag) & 0x00FF) << 24)) : (gid))
+
+#endif
+
+
+#ifdef CONFIG_TAGGING_UID16
+
+#define MAX_UID                0x0000FFFF
+#define MAX_GID                0xFFFFFFFF
+
+#define INOTAG_TAG(cond, uid, gid, tag)        \
+       ((cond) ? (((uid) >> 16) & 0xFFFF) : 0)
+
+#define TAGINO_UID(cond, uid, tag)     \
+       ((cond) ? (((uid) & 0xFFFF) | ((tag) << 16)) : (uid))
+#define TAGINO_GID(cond, gid, tag)     (gid)
+
+#endif
+
+
+#ifdef CONFIG_TAGGING_INTERN
+
+#define MAX_UID                0xFFFFFFFF
+#define MAX_GID                0xFFFFFFFF
+
+#define INOTAG_TAG(cond, uid, gid, tag)        \
+       ((cond) ? (tag) : 0)
+
+#define TAGINO_UID(cond, uid, tag)     (uid)
+#define TAGINO_GID(cond, gid, tag)     (gid)
+
+#endif
+
+
+#ifndef CONFIG_TAGGING_NONE
+#define dx_current_fstag(sb)   \
+       ((sb)->s_flags & MS_TAGGED ? dx_current_tag(): 0)
+#else
+#define dx_current_fstag(sb)   (0)
+#endif
+
+#ifndef CONFIG_TAGGING_INTERN
+#define TAGINO_TAG(cond, tag)  (0)
+#else
+#define TAGINO_TAG(cond, tag)  ((cond) ? (tag) : 0)
+#endif
+
+#define INOTAG_UID(cond, uid, gid)     \
+       ((cond) ? ((uid) & MAX_UID) : (uid))
+#define INOTAG_GID(cond, uid, gid)     \
+       ((cond) ? ((gid) & MAX_GID) : (gid))
+
+
+static inline uid_t dx_map_uid(uid_t uid)
+{
+       if ((uid > MAX_UID) && (uid != -1))
+               uid = -2;
+       return (uid & MAX_UID);
+}
+
+static inline gid_t dx_map_gid(gid_t gid)
+{
+       if ((gid > MAX_GID) && (gid != -1))
+               gid = -2;
+       return (gid & MAX_GID);
+}
+
+
+#ifdef CONFIG_VSERVER_LEGACY
+#define FIOC_GETTAG    _IOR('x', 1, long)
+#define FIOC_SETTAG    _IOW('x', 2, long)
+#define FIOC_SETTAGJ   _IOW('x', 3, long)
+#endif
+
+#ifdef CONFIG_PROPAGATE
+
+int dx_parse_tag(char *string, tag_t *tag, int remove);
+
+void __dx_propagate_tag(struct nameidata *nd, struct inode *inode);
+
+#define dx_propagate_tag(n,i)  __dx_propagate_tag(n,i)
+
+#else
+#define dx_propagate_tag(n,i)  do { } while (0)
+#endif
+
+#endif /* _DX_TAG_H */