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cmd_show_super: --field-only

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Kent Overstreet 2024-01-05 12:39:05 -05:00
parent 799439a88a
commit e7049c592a
1 changed files with 16 additions and 1 deletions
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17
cmd_format.c
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@ -305,6 +305,7 @@ static void show_super_usage(void)
"\n" "\n"
"Options:\n" "Options:\n"
" -f, --fields=(fields) list of sections to print\n" " -f, --fields=(fields) list of sections to print\n"
" --field-only=fiel) print superblock section only, no header\n"
" -l, --layout print superblock layout\n" " -l, --layout print superblock layout\n"
" -h, --help display this help and exit\n" " -h, --help display this help and exit\n"
"Report bugs to <linux-bcachefs@vger.kernel.org>"); "Report bugs to <linux-bcachefs@vger.kernel.org>");
@ -315,11 +316,13 @@ int cmd_show_super(int argc, char *argv[])
{ {
static const struct option longopts[] = { static const struct option longopts[] = {
{ "fields", 1, NULL, 'f' }, { "fields", 1, NULL, 'f' },
{ "field-only", 1, NULL, 'F' },
{ "layout", 0, NULL, 'l' }, { "layout", 0, NULL, 'l' },
{ "help", 0, NULL, 'h' }, { "help", 0, NULL, 'h' },
{ NULL } { NULL }
}; };
unsigned fields = 0; unsigned fields = 0;
int field_only = -1;
bool print_layout = false; bool print_layout = false;
bool print_default_fields = true; bool print_default_fields = true;
int opt; int opt;
@ -333,6 +336,11 @@ int cmd_show_super(int argc, char *argv[])
bch2_sb_fields, "superblock field"); bch2_sb_fields, "superblock field");
print_default_fields = false; print_default_fields = false;
break; break;
case 'F':
field_only = read_string_list_or_die(optarg,
bch2_sb_fields, "superblock field");
print_default_fields = false;
break;
case 'l': case 'l':
print_layout = true; print_layout = true;
break; break;
@ -369,7 +377,14 @@ int cmd_show_super(int argc, char *argv[])
buf.human_readable_units = true; buf.human_readable_units = true;
bch2_sb_to_text(&buf, sb.sb, print_layout, fields); if (field_only >= 0) {
struct bch_sb_field *f = bch2_sb_field_get_id(sb.sb, field_only);
if (f)
__bch2_sb_field_to_text(&buf, sb.sb, f);
} else {
bch2_sb_to_text(&buf, sb.sb, print_layout, fields);
}
printf("%s", buf.buf); printf("%s", buf.buf);
bch2_free_super(&sb); bch2_free_super(&sb);