diff options
| author | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2008-10-22 14:23:00 +0300 |
|---|---|---|
| committer | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2008-10-22 15:31:12 +0300 |
| commit | 06ff08f391e0297c4fcde63b801e6992d2238ae2 (patch) | |
| tree | 9ed853db391876a887962c1d75b1c13786ce85bf | |
| parent | d217a4e65084b0ef807e5749513bff16ddfb0b58 (diff) | |
Define the worst case compression constant
It will be used in the next patches.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
| -rw-r--r-- | mkfs.ubifs/compr.h | 8 | ||||
| -rw-r--r-- | mkfs.ubifs/mkfs.ubifs.c | 3 |
2 files changed, 10 insertions, 1 deletions
diff --git a/mkfs.ubifs/compr.h b/mkfs.ubifs/compr.h index c76a5b9..e3dd95c 100644 --- a/mkfs.ubifs/compr.h +++ b/mkfs.ubifs/compr.h @@ -23,6 +23,14 @@ #ifndef __UBIFS_COMPRESS_H__ #define __UBIFS_COMPRESS_H__ +/* + * Compressors may end-up with more data in the output buffer than in the input + * buffer. This constant defined the worst case factor, i.e. we assume that the + * output buffer may be at max. WORST_COMPR_FACTOR times larger than input + * buffer. + */ +#define WORST_COMPR_FACTOR 4 + enum compression_type { MKFS_UBIFS_COMPR_NONE, diff --git a/mkfs.ubifs/mkfs.ubifs.c b/mkfs.ubifs/mkfs.ubifs.c index 65ebc8c..18ede49 100644 --- a/mkfs.ubifs/mkfs.ubifs.c +++ b/mkfs.ubifs/mkfs.ubifs.c @@ -28,7 +28,8 @@ #define HASH_TABLE_SIZE 10099 /* The node buffer must allow for worst case compression */ -#define NODE_BUFFER_SIZE (UBIFS_DATA_NODE_SZ + UBIFS_BLOCK_SIZE * 4) +#define NODE_BUFFER_SIZE (UBIFS_DATA_NODE_SZ + \ + UBIFS_BLOCK_SIZE * WORST_COMPR_FACTOR) /* Default time granularity in nanoseconds */ #define DEFAULT_TIME_GRAN 1000000000 |