diff options
Diffstat (limited to 'sys/fs/ext2fs/ext2fs.h')
| -rwxr-xr-x | sys/fs/ext2fs/ext2fs.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/sys/fs/ext2fs/ext2fs.h b/sys/fs/ext2fs/ext2fs.h index baac2de..7dc93dc 100755 --- a/sys/fs/ext2fs/ext2fs.h +++ b/sys/fs/ext2fs/ext2fs.h @@ -45,6 +45,16 @@ #define EXT2_LINK_MAX 32000 /* + * A summary of contiguous blocks of various sizes is maintained + * in each cylinder group. Normally this is set by the initial + * value of fs_maxcontig. + * + * XXX:FS_MAXCONTIG is set to 16 to conserve space. Here we set + * EXT2_MAXCONTIG to 32 for better performance. + */ +#define EXT2_MAXCONTIG 32 + +/* * Constants relative to the data blocks */ #define EXT2_NDIR_BLOCKS 12 @@ -151,6 +161,10 @@ struct m_ext2fs { char e2fs_wasvalid; /* valid at mount time */ off_t e2fs_maxfilesize; struct ext2_gd *e2fs_gd; /* Group Descriptors */ + int32_t e2fs_maxcontig; /* max number of contiguous blks */ + int32_t e2fs_contigsumsize; /* size of cluster summary array */ + int32_t *e2fs_maxcluster; /* max cluster in each cyl group */ + struct csum *e2fs_clustersum; /* cluster summary in each cyl group */ }; /* @@ -253,6 +267,13 @@ struct ext2_gd { uint32_t reserved2[3]; }; +/* cluster summary information */ + +struct csum { + int8_t cs_init; /* cluster summary has been initialized */ + int32_t *cs_sum; /* cluster summary array */ +}; + /* EXT2FS metadatas are stored in little-endian byte order. These macros * helps reading these metadatas */ |
