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| author | Toshiyuki Okajima <toshi.okajima@jp.fujitsu.com> | 2009-06-08 18:41:35 +0200 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2009-06-08 18:41:35 +0200 |
| commit | 9aee2286071c23c535fe9928eec1a26e0bcf256d (patch) | |
| tree | e0518acaa75c1399ffcf67ca74a54d5a9488296b /fs/ext4/inode.c | |
| parent | ext4: truncate the file properly if we fail to copy data from userspace (diff) | |
| download | linux-9aee2286071c23c535fe9928eec1a26e0bcf256d.tar.xz linux-9aee2286071c23c535fe9928eec1a26e0bcf256d.zip | |
ext4: fix dx_map_entry to support 256k directory blocks
The dx_map_entry structure doesn't support over 64KB block size by
current usage of its member("offs"). Because "offs" treats an offset
of copies of the ext4_dir_entry_2 structure as is. This member size is
16 bits. But real offset for over 64KB(256KB) block size needs 18
bits. However, real offset keeps 4 byte boundary, so lower 2 bits is
not used.
Therefore, we do the following to fix this limitation:
For "store":
we divide the real offset by 4 and then store this result to "offs"
member.
For "use":
we multiply "offs" member by 4 and then use this result
as real offset.
Signed-off-by: Toshiyuki Okajima <toshi.okajima@jp.fujitsu.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/inode.c')
0 files changed, 0 insertions, 0 deletions