[PATCH 2/4] btrfs-progs: add option g to show generation, do not show it by default

[David Sterba <dsterba@suse.cz>]

The generation was not printed so far, and adding 'g' will pair the 'G'
filter.

Signed-off-by: David Sterba <dsterba@suse.cz>
---
 btrfs-list.c     |    2 +-
 cmds-subvolume.c |    8 ++++++--
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/btrfs-list.c b/btrfs-list.c
index e5f0f96..3821064 100644
--- a/btrfs-list.c
+++ b/btrfs-list.c
@@ -105,7 +105,7 @@ struct {
 	{
 		.name		= "gen",
 		.column_name	= "Gen",
-		.need_print	= 1,
+		.need_print	= 0,
 	},
 	{
 		.name		= "cgen",
diff --git a/cmds-subvolume.c b/cmds-subvolume.c
index 61be38a..a2dece6 100644
--- a/cmds-subvolume.c
+++ b/cmds-subvolume.c
@@ -277,7 +277,7 @@ out:
  * - lowercase for enabling specific items in the output
  */
 static const char * const cmd_subvol_list_usage[] = {
-	"btrfs subvolume list [-apurts] [-G [+|-]value] [-C [+|-]value] "
+	"btrfs subvolume list [-agpurts] [-G [+|-]value] [-C [+|-]value] "
 	"[--sort=gen,ogen,rootid,path] <path>",
 	"List subvolumes (and snapshots)",
 	"",
@@ -285,6 +285,7 @@ static const char * const cmd_subvol_list_usage[] = {
 	"-a           print all the subvolumes in the filesystem.",
 	"-u           print the uuid of subvolumes (and snapshots)",
 	"-t           print the result as a table",
+	"-g           print the generation of the subvolume",
 	"-s           list snapshots only in the filesystem",
 	"-r           list readonly subvolumes (including snapshots)",
 	"-G [+|-]value",
@@ -323,7 +324,7 @@ static int cmd_subvol_list(int argc, char **argv)
 	optind = 1;
 	while(1) {
 		c = getopt_long(argc, argv,
-				    "apsurG:C:t", long_options, NULL);
+				    "agpsurG:C:t", long_options, NULL);
 		if (c < 0)
 			break;
 
@@ -334,6 +335,9 @@ 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 't':
 			is_tab_result = 1;
 			break;
-- 
1.7.6.233.gd79bc