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Btrfs-progs: introduce '-t' option into subvolume list command

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This patch introduces '-t' option into subvolume list command. By this
option, we can output the result as a table.

Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
This commit is contained in:
Miao Xie 2012-09-20 19:04:22 +08:00 committed by root
parent 60d11eca66
commit 0f53cf81f6
4 changed files with 74 additions and 9 deletions
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64
btrfs-list.c
View File

@ -1334,6 +1334,25 @@ static void print_subvolume_column(struct root_info *subv,
}
}
static void print_single_volume_info_table(struct root_info *subv)
{
int i;
for (i = 0; i < BTRFS_LIST_ALL; i++) {
if (!btrfs_list_columns[i].need_print)
continue;
print_subvolume_column(subv, i);
if (i != BTRFS_LIST_PATH)
printf("\t");
if (i == BTRFS_LIST_TOP_LEVEL)
printf("\t");
}
printf("\n");
}
static void print_single_volume_info_default(struct root_info *subv)
{
int i;
@ -1351,21 +1370,58 @@ static void print_single_volume_info_default(struct root_info *subv)
printf("\n");
}
static void print_all_volume_info_default(struct root_lookup *sorted_tree)
static void print_all_volume_info_tab_head()
{
int i;
int len;
char barrier[20];
for (i = 0; i < BTRFS_LIST_ALL; i++) {
if (btrfs_list_columns[i].need_print)
printf("%s\t", btrfs_list_columns[i].name);
if (i == BTRFS_LIST_ALL-1)
printf("\n");
}
for (i = 0; i < BTRFS_LIST_ALL; i++) {
memset(barrier, 0, sizeof(barrier));
if (btrfs_list_columns[i].need_print) {
len = strlen(btrfs_list_columns[i].name);
while (len--)
strcat(barrier, "-");
printf("%s\t", barrier);
}
if (i == BTRFS_LIST_ALL-1)
printf("\n");
}
}
static void print_all_volume_info(struct root_lookup *sorted_tree,
int is_tab_result)
{
struct rb_node *n;
struct root_info *entry;
if (is_tab_result)
print_all_volume_info_tab_head();
n = rb_first(&sorted_tree->root);
while (n) {
entry = rb_entry(n, struct root_info, sort_node);
print_single_volume_info_default(entry);
if (is_tab_result)
print_single_volume_info_table(entry);
else
print_single_volume_info_default(entry);
n = rb_next(n);
}
}
int btrfs_list_subvols(int fd, struct btrfs_list_filter_set *filter_set,
struct btrfs_list_comparer_set *comp_set)
struct btrfs_list_comparer_set *comp_set,
int is_tab_result)
{
struct root_lookup root_lookup;
struct root_lookup root_sort;
@ -1389,7 +1445,7 @@ int btrfs_list_subvols(int fd, struct btrfs_list_filter_set *filter_set,
__filter_and_sort_subvol(&root_lookup, &root_sort, filter_set,
comp_set);
print_all_volume_info_default(&root_sort);
print_all_volume_info(&root_sort, is_tab_result);
__free_all_subvolumn(&root_lookup);
return ret;
}

3
btrfs-list.h
View File

@ -98,7 +98,8 @@ int btrfs_list_setup_comparer(struct btrfs_list_comparer_set **comp_set,
int is_descending);
int btrfs_list_subvols(int fd, struct btrfs_list_filter_set *filter_set,
struct btrfs_list_comparer_set *comp_set);
struct btrfs_list_comparer_set *comp_set,
int is_tab_result);
int btrfs_list_find_updated_files(int fd, u64 root_id, u64 oldest_gen);
int btrfs_list_get_default_subvolume(int fd, u64 *default_id);
char *btrfs_list_path_for_root(int fd, u64 root);

14
cmds-subvolume.c
View File

@ -260,12 +260,13 @@ static int cmd_subvol_delete(int argc, char **argv)
}
static const char * const cmd_subvol_list_usage[] = {
"btrfs subvolume list [-pur] [-s 0|1] [-g [+|-]value] [-c [+|-]value] "
"btrfs subvolume list [-purt] [-s 0|1] [-g [+|-]value] [-c [+|-]value] "
"[--sort=gen,ogen,rootid,path] <path>",
"List subvolumes (and snapshots)",
"",
"-p print parent ID",
"-u print the uuid of subvolumes (and snapshots)",
"-t print the result as a table",
"-s value list snapshots with generation in ascending/descending order",
" (1: ascending, 0: descending)",
"-r list readonly subvolumes (including snapshots)",
@ -292,6 +293,7 @@ static int cmd_subvol_list(int argc, char **argv)
int order;
int c;
char *subvol;
int is_tab_result = 0;
struct option long_options[] = {
{"sort", 1, NULL, 'S'},
{0, 0, 0, 0}
@ -303,7 +305,7 @@ static int cmd_subvol_list(int argc, char **argv)
optind = 1;
while(1) {
c = getopt_long(argc, argv,
"ps:urg:c:", long_options, NULL);
"ps:urg:c:t", long_options, NULL);
if (c < 0)
break;
@ -311,6 +313,9 @@ static int cmd_subvol_list(int argc, char **argv)
case 'p':
btrfs_list_setup_print_column(BTRFS_LIST_PARENT);
break;
case 't':
is_tab_result = 1;
break;
case 's':
order = atoi(optarg);
btrfs_list_setup_filter(&filter_set,
@ -382,7 +387,8 @@ static int cmd_subvol_list(int argc, char **argv)
return 12;
}
ret = btrfs_list_subvols(fd, filter_set, comparer_set);
ret = btrfs_list_subvols(fd, filter_set, comparer_set,
is_tab_result);
if (ret)
return 19;
return 0;
@ -588,7 +594,7 @@ static int cmd_subvol_get_default(int argc, char **argv)
btrfs_list_setup_filter(&filter_set, BTRFS_LIST_FILTER_ROOTID,
default_id);
ret = btrfs_list_subvols(fd, filter_set, NULL);
ret = btrfs_list_subvols(fd, filter_set, NULL, 0);
if (ret)
return 19;
return 0;

2
man/btrfs.8.in
View File

@ -122,6 +122,8 @@ If \fI-p\fR is given, then \fIparent <ID>\fR is added to the output between ID
and top level. The parent's ID may be used at mount time via the
\fIsubvolrootid=\fR option.
\fB-t\fP print the result as a table.
\fB-r\fP only readonly subvolumes in the filesystem wille be listed.
\fB-s\fP only snapshot subvolumes in the filesystem will be listed.