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| author | Jin Qian <jinqian@google.com> | 2017-04-25 16:28:48 -0700 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2017-05-02 21:19:48 -0700 |
| commit | b9dd46188edc2f0d1f37328637860bb65a771124 (patch) | |
| tree | 9476c2adfe493a9b3f91f3e8363a3e269b21cde6 /include/linux | |
| parent | a817737e87d506ea7b3983d287b4578c99922d85 (diff) | |
| download | lwn-b9dd46188edc2f0d1f37328637860bb65a771124.tar.gz lwn-b9dd46188edc2f0d1f37328637860bb65a771124.zip | |
f2fs: sanity check segment count
F2FS uses 4 bytes to represent block address. As a result, supported
size of disk is 16 TB and it equals to 16 * 1024 * 1024 / 2 segments.
Signed-off-by: Jin Qian <jinqian@google.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/f2fs_fs.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h index 639cbdf65e2b..093549e10ee2 100644 --- a/include/linux/f2fs_fs.h +++ b/include/linux/f2fs_fs.h @@ -302,6 +302,12 @@ struct f2fs_nat_block { #define SIT_ENTRY_PER_BLOCK (PAGE_SIZE / sizeof(struct f2fs_sit_entry)) /* + * F2FS uses 4 bytes to represent block address. As a result, supported size of + * disk is 16 TB and it equals to 16 * 1024 * 1024 / 2 segments. + */ +#define F2FS_MAX_SEGMENT ((16 * 1024 * 1024) / 2) + +/* * Note that f2fs_sit_entry->vblocks has the following bit-field information. * [15:10] : allocation type such as CURSEG_XXXX_TYPE * [9:0] : valid block count |