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| author | Lubomir Rintel <lkundrak@v3.sk> | 2010-08-10 18:03:33 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-11 08:59:22 -0700 |
| commit | 0bcaa65a56ab74003666cf741b0bfa1e9263a11c (patch) | |
| tree | 580445e4f38cf6894ff695069edcc048b09870dd /include/linux | |
| parent | a36517e9302b8396db24600bf9f67e4d1c441907 (diff) | |
| download | linux-stable-0bcaa65a56ab74003666cf741b0bfa1e9263a11c.tar.gz linux-stable-0bcaa65a56ab74003666cf741b0bfa1e9263a11c.tar.bz2 linux-stable-0bcaa65a56ab74003666cf741b0bfa1e9263a11c.zip | |
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')
| -rw-r--r-- | include/linux/sysv_fs.h | 11 |
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 */ |