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Fix 64KB blocksize in ext3 directories

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With 64KB blocksize, a directory entry can have size 64KB which does not
fit into 16 bits we have for entry lenght.  So we store 0xffff instead and
convert value when read from / written to disk.  The patch also converts
some places to use ext3_next_entry() when we are changing them anyway.

[akpm@linux-foundation.org: coding-style cleanups]
Signed-off-by: Jan Kara <jack@suse.cz>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jan Kara
2007-11-14 17:00:19 -08:00
committed by Linus Torvalds
parent dbaf4c024a
commit 7c06a8dc64
3 changed files with 70 additions and 52 deletions
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20
include/linux/ext3_fs.h
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@@ -656,6 +656,26 @@ struct ext3_dir_entry_2 {
#define EXT3_DIR_ROUND (EXT3_DIR_PAD - 1)
#define EXT3_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT3_DIR_ROUND) & \
~EXT3_DIR_ROUND)
#define EXT3_MAX_REC_LEN ((1<<16)-1)
static inline unsigned ext3_rec_len_from_disk(__le16 dlen)
{
unsigned len = le16_to_cpu(dlen);
if (len == EXT3_MAX_REC_LEN)
return 1 << 16;
return len;
}
static inline __le16 ext3_rec_len_to_disk(unsigned len)
{
if (len == (1 << 16))
return cpu_to_le16(EXT3_MAX_REC_LEN);
else if (len > (1 << 16))
BUG();
return cpu_to_le16(len);
}
/*
* Hash Tree Directory indexing
* (c) Daniel Phillips, 2001