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mke2fs: add support for cluster size in mke2fs.conf

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Add support for specifying the cluster size in mke2fs.conf

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Theodore Ts'o 2011-06-14 14:30:22 -04:00
parent 4c2b28ab67
commit 2d34a25f81
2 changed files with 17 additions and 9 deletions
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19
misc/mke2fs.c
View File

@ -1177,7 +1177,7 @@ out:
static void PRS(int argc, char *argv[])
{
int b, c;
int size;
int cluster_size = 0;
char *tmp, **cpp;
int blocksize = 0;
int inode_ratio = 0;
@ -1305,16 +1305,14 @@ profile_error:
cflag++;
break;
case 'C':
size = strtoul(optarg, &tmp, 0);
if (size < EXT2_MIN_CLUSTER_SIZE ||
size > EXT2_MAX_CLUSTER_SIZE || *tmp) {
cluster_size = strtoul(optarg, &tmp, 0);
if (cluster_size < EXT2_MIN_CLUSTER_SIZE ||
cluster_size > EXT2_MAX_CLUSTER_SIZE || *tmp) {
com_err(program_name, 0,
_("invalid fragment size - %s"),
optarg);
exit(1);
}
fs_param.s_log_cluster_size =
int_log2(size >> EXT2_MIN_CLUSTER_LOG_SIZE);
break;
case 'g':
fs_param.s_blocks_per_group = strtoul(optarg, &tmp, 0);
@ -1801,9 +1799,12 @@ profile_error:
fs_param.s_log_block_size =
int_log2(blocksize >> EXT2_MIN_BLOCK_LOG_SIZE);
if (fs_param.s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_BIGALLOC) {
if (fs_param.s_log_cluster_size == 0)
fs_param.s_log_cluster_size =
fs_param.s_log_block_size + 4;
if (!cluster_size)
cluster_size = get_int_from_profile(fs_types,
"cluster_size",
blocksize*4);
fs_param.s_log_cluster_size =
int_log2(cluster_size >> EXT2_MIN_CLUSTER_LOG_SIZE);
} else
fs_param.s_log_cluster_size = fs_param.s_log_block_size;

7
misc/mke2fs.conf.5.in
View File

@ -395,6 +395,13 @@ on a per-filesystem type basis.
This relation is a boolean which specifies whether the
.BR mke2fs (8)
should attempt to discard device prior to filesystem creation.
.TP
.I cluster_size
This relation specifies the default cluster size if the bigalloc file
system feature is enabled. It can be overridden via the
.B \-C
command line option to
.BR mke2fs (8)
.SH THE [devices] STANZA
Each tag in the
.I [devices]