isa/make_ext4fs
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Allow specifying reserved blocks percentage

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Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>
This commit is contained in:
Jo-Philipp Wich 2015-04-08 07:45:53 +02:00
parent 67cbf164c7
commit 828ec043d2
4 changed files with 8 additions and 4 deletions
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1
ext4_sb.h
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@ -39,6 +39,7 @@ struct fs_info {
uint16_t feat_compat; uint16_t feat_compat;
uint16_t feat_incompat; uint16_t feat_incompat;
uint32_t bg_desc_reserve_blocks; uint32_t bg_desc_reserve_blocks;
uint32_t reserve_pcnt;
const char *label; const char *label;
uint8_t no_journal; uint8_t no_journal;
}; };

3
ext4_utils.c
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@ -191,7 +191,7 @@ void ext4_fill_in_sb()
sb->s_inodes_count = info.inodes_per_group * aux_info.groups; sb->s_inodes_count = info.inodes_per_group * aux_info.groups;
sb->s_blocks_count_lo = aux_info.len_blocks; sb->s_blocks_count_lo = aux_info.len_blocks;
sb->s_r_blocks_count_lo = 0; sb->s_r_blocks_count_lo = (aux_info.len_blocks / 100) * info.reserve_pcnt;
sb->s_free_blocks_count_lo = 0; sb->s_free_blocks_count_lo = 0;
sb->s_free_inodes_count = 0; sb->s_free_inodes_count = 0;
sb->s_first_data_block = aux_info.first_data_block; sb->s_first_data_block = aux_info.first_data_block;
@ -533,4 +533,3 @@ int read_ext(int fd, int verbose)
return 0; return 0;
} }

1
make_ext4fs.c
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@ -456,6 +456,7 @@ int make_ext4fs_internal(int fd, const char *_directory,
printf(" Blocks: %"PRIu64"\n", aux_info.len_blocks); printf(" Blocks: %"PRIu64"\n", aux_info.len_blocks);
printf(" Block groups: %d\n", aux_info.groups); printf(" Block groups: %d\n", aux_info.groups);
printf(" Reserved blocks: %"PRIu64"\n", (aux_info.len_blocks / 100) * info.reserve_pcnt);
printf(" Reserved block group size: %d\n", info.bg_desc_reserve_blocks); printf(" Reserved block group size: %d\n", info.bg_desc_reserve_blocks);
ext4_sparse_file = sparse_file_new(info.block_size, info.len); ext4_sparse_file = sparse_file_new(info.block_size, info.len);

7
make_ext4fs_main.c
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@ -35,7 +35,7 @@ static void usage(char *path)
{ {
fprintf(stderr, "%s [ -l <len> ] [ -j <journal size> ] [ -b <block_size> ]\n", basename(path)); fprintf(stderr, "%s [ -l <len> ] [ -j <journal size> ] [ -b <block_size> ]\n", basename(path));
fprintf(stderr, " [ -g <blocks per group> ] [ -i <inodes> ] [ -I <inode size> ]\n"); fprintf(stderr, " [ -g <blocks per group> ] [ -i <inodes> ] [ -I <inode size> ]\n");
fprintf(stderr, " [ -L <label> ] [ -f ]\n"); fprintf(stderr, " [ -m <reserved blocks percent> ] [ -L <label> ] [ -f ]\n");
fprintf(stderr, " [ -S file_contexts ] [ -C fs_config ] [ -T timestamp ]\n"); fprintf(stderr, " [ -S file_contexts ] [ -C fs_config ] [ -T timestamp ]\n");
fprintf(stderr, " [ -z | -s ] [ -w ] [ -c ] [ -J ] [ -v ] [ -B <block_list_file> ]\n"); fprintf(stderr, " [ -z | -s ] [ -w ] [ -c ] [ -J ] [ -v ] [ -B <block_list_file> ]\n");
fprintf(stderr, " <filename> [<directory>]\n"); fprintf(stderr, " <filename> [<directory>]\n");
@ -58,7 +58,7 @@ int main(int argc, char **argv)
time_t fixed_time = -1; time_t fixed_time = -1;
FILE* block_list_file = NULL; FILE* block_list_file = NULL;
while ((opt = getopt(argc, argv, "l:j:b:g:i:I:L:T:C:B:fwzJsctv")) != -1) { while ((opt = getopt(argc, argv, "l:j:b:g:i:I:L:T:C:B:m:fwzJsctv")) != -1) {
switch (opt) { switch (opt) {
case 'l': case 'l':
info.len = parse_num(optarg); info.len = parse_num(optarg);
@ -118,6 +118,9 @@ int main(int argc, char **argv)
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
break; break;
case 'm':
info.reserve_pcnt = strtoul(optarg, NULL, 0);
break;
default: /* '?' */ default: /* '?' */
usage(argv[0]); usage(argv[0]);
exit(EXIT_FAILURE); exit(EXIT_FAILURE);