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| author | Jan Kara <jack@suse.cz> | 2008-04-07 16:15:04 +0200 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2008-04-17 14:23:13 +0200 |
| commit | 5fb28aa25ab0b71af2e441d68e63ad257e610a04 (patch) | |
| tree | e0cba62535022802a4b47e5d04d49e2cc9f93ced /fs/udf/super.c | |
| parent | 423cf6dc04eb79d441bfda2b127bc4b57134b41d (diff) | |
| download | lwn-5fb28aa25ab0b71af2e441d68e63ad257e610a04.tar.gz lwn-5fb28aa25ab0b71af2e441d68e63ad257e610a04.zip | |
udf: Improve anchor block detection
Add <last block>+1 and <last block>-1 to a list of blocks which can be the
real last recorded block on a UDF media. Sebastian Manciulea
<manciuleas@yahoo.com> claims this helps some drive + media combinations
he is able to test.
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/udf/super.c')
| -rw-r--r-- | fs/udf/super.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/fs/udf/super.c b/fs/udf/super.c index fe0dafebde71..b9e719de0704 100644 --- a/fs/udf/super.c +++ b/fs/udf/super.c @@ -709,14 +709,16 @@ static int udf_check_anchor_block(struct super_block *sb, sector_t block, static sector_t udf_scan_anchors(struct super_block *sb, bool varconv, sector_t lastblock) { - sector_t last[4]; + sector_t last[6]; int i; struct udf_sb_info *sbi = UDF_SB(sb); last[0] = lastblock; - last[1] = last[0] - 2; - last[2] = last[0] - 150; - last[3] = last[0] - 152; + last[1] = last[0] - 1; + last[2] = last[0] + 1; + last[3] = last[0] - 2; + last[4] = last[0] - 150; + last[5] = last[0] - 152; /* according to spec, anchor is in either: * block 256 @@ -727,6 +729,9 @@ static sector_t udf_scan_anchors(struct super_block *sb, bool varconv, for (i = 0; i < ARRAY_SIZE(last); i++) { if (last[i] < 0) continue; + if (last[i] >= sb->s_bdev->bd_inode->i_size >> + sb->s_blocksize_bits) + continue; if (udf_check_anchor_block(sb, last[i], varconv)) { sbi->s_anchor[0] = last[i]; |