btrfs-progs: add option g to show generation

Add 'g' to pair the 'G' filter.

Signed-off-by: David Sterba <dsterba@suse.cz>

diff --git a/cmds-subvolume.c b/cmds-subvolume.c
index 0a01cbe..f2744e8 100644 (file)
--- a/cmds-subvolume.c
+++ b/cmds-subvolume.c
@@ -279,7 +279,7 @@ out:
  * - lowercase for enabling specific items in the output
  */
 static const char * const cmd_subvol_list_usage[] = {
-       "btrfs subvolume list [-aopurts] [-G [+|-]value] [-C [+|-]value] "
+       "btrfs subvolume list [-agopurts] [-G [+|-]value] [-C [+|-]value] "
        "[--sort=gen,ogen,rootid,path] <path>",
        "List subvolumes (and snapshots)",
        "",
@@ -287,6 +287,7 @@ static const char * const cmd_subvol_list_usage[] = {
        "-a           print all the subvolumes in the filesystem and",
        "             distinguish absolute and relative path with respect",
        "             to the given <path>",
+       "-g           print the generation of the subvolume",
        "-o           print only subvolumes bellow specified path",
        "-u           print the uuid of subvolumes (and snapshots)",
        "-q           print the parent uuid of the snapshots",
@@ -330,7 +331,7 @@ static int cmd_subvol_list(int argc, char **argv)
        optind = 1;
        while(1) {
                c = getopt_long(argc, argv,
-                                   "aopqsurG:C:t", long_options, NULL);
+                                   "agopqsurG:C:t", long_options, NULL);
                if (c < 0)
                        break;
 
@@ -341,6 +342,9 @@ static int cmd_subvol_list(int argc, char **argv)
                case 'a':
                        is_list_all = 1;
                        break;
+               case 'g':
+                       btrfs_list_setup_print_column(BTRFS_LIST_GENERATION);
+                       break;
                case 'o':
                        is_only_in_path = 1;
                        break;