summaryrefslogtreecommitdiff
path: root/include/linux/sysv_fs.h
diff options
context:
space:
mode:
authorLubomir Rintel <lkundrak@v3.sk>2010-08-11 05:03:33 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2010-08-11 19:59:22 +0400
commit0bcaa65a56ab74003666cf741b0bfa1e9263a11c (patch)
tree580445e4f38cf6894ff695069edcc048b09870dd /include/linux/sysv_fs.h
parenta36517e9302b8396db24600bf9f67e4d1c441907 (diff)
downloadlinux-0bcaa65a56ab74003666cf741b0bfa1e9263a11c.tar.xz
fs/sysv: v7: adjust sanity checks for some volumes
Newly mkfs-ed filesystems from Seventh Edition have last modification time set to zero, but are otherwise perfectly valid. Also, tighten up other sanity checks to filter out most filesystems with [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Lubomir Rintel <lkundrak@v3.sk> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/sysv_fs.h')
-rw-r--r--include/linux/sysv_fs.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/sysv_fs.h b/include/linux/sysv_fs.h
index 96411306eec6..e47d6d90023d 100644
--- 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 */