Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...

[firefly-linux-kernel-4.4.55.git] / include / linux / sysv_fs.h

diff --git a/include/linux/sysv_fs.h b/include/linux/sysv_fs.h
index 96411306eec63f66e3dc0afe20a169151ccbc3c6..e47d6d90023dbd55794134f8a86035c8e629820e 100644 (file)
--- a/include/linux/sysv_fs.h
+++ b/include/linux/sysv_fs.h
@@ -148,6 +148,17 @@ struct v7_super_block {
        char    s_fname[6];     /* file system name */
        char    s_fpack[6];     /* file system pack name */
 };
+/* Constants to aid sanity checking */
+/* This is not a hard limit, nor enforced by v7 kernel. It's actually just
+ * the limit used by Seventh Edition's ls, though is high enough to assume
+ * that no reasonable file system would have that much entries in root
+ * directory. Thus, if we see anything higher, we just probably got the
+ * endiannes wrong. */
+#define V7_NFILES      1024
+/* The disk addresses are three-byte (despite direct block addresses being
+ * aligned word-wise in inode). If the most significant byte is non-zero,
+ * something is most likely wrong (not a filesystem, bad bytesex). */
+#define V7_MAXSIZE     0x00ffffff
 
 /* Coherent super-block data on disk */
 #define COH_NICINOD    100     /* number of inode cache entries */