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authorStefan Brüns <stefan.bruens@rwth-aachen.de>2016-09-17 02:10:07 +0200
committerTom Rini <trini@konsulko.com>2016-09-23 09:18:56 -0400
commitfc214ef90910159f33fbe92a6cb77839a27fa8a6 (patch)
tree2e6b1fc13ed19e24b3992d6fd10197a4ee82da41 /fs/ext4
parent3ee2f977f3649bcc1d0de86356145e8e6999575a (diff)
ext4: determine group descriptor size for 64bit feature
If EXT4_FEATURE_INCOMPAT_64BIT is set, the descriptor can be read from the superblocks, otherwise it defaults to 32. Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Diffstat (limited to 'fs/ext4')
-rw-r--r--fs/ext4/ext4_common.c18
1 files changed, 14 insertions, 4 deletions
diff --git a/fs/ext4/ext4_common.c b/fs/ext4/ext4_common.c
index 5f21dc7948..2df4f8b6d9 100644
--- a/fs/ext4/ext4_common.c
+++ b/fs/ext4/ext4_common.c
@@ -2233,13 +2233,23 @@ int ext4fs_mount(unsigned part_length)
goto fail;
}
- if (le32_to_cpu(data->sblock.revision_level) == 0)
+ if (le32_to_cpu(data->sblock.revision_level) == 0) {
fs->inodesz = 128;
- else
+ } else {
+ debug("EXT4 features COMPAT: %08x INCOMPAT: %08x RO_COMPAT: %08x\n",
+ __le32_to_cpu(data->sblock.feature_compatibility),
+ __le32_to_cpu(data->sblock.feature_incompat),
+ __le32_to_cpu(data->sblock.feature_ro_compat));
+
fs->inodesz = le16_to_cpu(data->sblock.inode_size);
+ fs->gdsize = le32_to_cpu(data->sblock.feature_incompat) &
+ EXT4_FEATURE_INCOMPAT_64BIT ?
+ le16_to_cpu(data->sblock.descriptor_size) : 32;
+ }
- debug("EXT2 rev %d, inode_size %d\n",
- le32_to_cpu(data->sblock.revision_level), fs->inodesz);
+ debug("EXT2 rev %d, inode_size %d, descriptor size %d\n",
+ le32_to_cpu(data->sblock.revision_level),
+ fs->inodesz, fs->gdsize);
data->diropen.data = data;
data->diropen.ino = 2;