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| author | Stefan Brüns <stefan.bruens@rwth-aachen.de> | 2016-09-17 02:10:09 +0200 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2016-09-23 09:18:57 -0400 |
| commit | f798b1dda1c5de818b806189e523d1b75db7e72d (patch) | |
| tree | 8a75244a1caed4622f20fb5e9304041becadbf19 /fs/ext4/ext4_common.c | |
| parent | 9f5dd8b6e2ff0f1553cc71aaf6cb53adb9c7f5e6 (diff) | |
ext4: Use correct descriptor size when reading the block group descriptor
The correct descriptor size must be used when calculating offsets, and
also to read the correct amount of data.
Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Diffstat (limited to 'fs/ext4/ext4_common.c')
| -rw-r--r-- | fs/ext4/ext4_common.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/ext4/ext4_common.c b/fs/ext4/ext4_common.c index 81740f8c66..b745d8d450 100644 --- a/fs/ext4/ext4_common.c +++ b/fs/ext4/ext4_common.c @@ -1527,20 +1527,20 @@ static int ext4fs_blockgroup long int blkno; unsigned int blkoff, desc_per_blk; int log2blksz = get_fs()->dev_desc->log2blksz; + int desc_size = get_fs()->gdsize; - desc_per_blk = EXT2_BLOCK_SIZE(data) / sizeof(struct ext2_block_group); + desc_per_blk = EXT2_BLOCK_SIZE(data) / desc_size; blkno = le32_to_cpu(data->sblock.first_data_block) + 1 + group / desc_per_blk; - blkoff = (group % desc_per_blk) * sizeof(struct ext2_block_group); + blkoff = (group % desc_per_blk) * desc_size; debug("ext4fs read %d group descriptor (blkno %ld blkoff %u)\n", group, blkno, blkoff); return ext4fs_devread((lbaint_t)blkno << (LOG2_BLOCK_SIZE(data) - log2blksz), - blkoff, sizeof(struct ext2_block_group), - (char *)blkgrp); + blkoff, desc_size, (char *)blkgrp); } int ext4fs_read_inode(struct ext2_data *data, int ino, struct ext2_inode *inode) |