Re: [PATCH 02/12] Btrfs-progs: move printing subvol list outside of btrfs_list_subvols

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Thanks for the review. Comments accepted. V5 sent out.

Anand


On 01/30/2013 11:27 AM, Wang Shilong wrote:
Hi,
To improve the code reuse its better to have btrfs_list_subvols
just return list of subvols witout printing

Signed-off-by: Anand Jain <anand.jain@xxxxxxxxxx>
---
  btrfs-list.c     | 28 ++++++++++++++++++----------
  btrfs-list.h     |  2 +-
  cmds-subvolume.c |  4 ++--
  3 files changed, 21 insertions(+), 13 deletions(-)

diff --git a/btrfs-list.c b/btrfs-list.c
index cb42fbc..b404e1d 100644
--- a/btrfs-list.c
+++ b/btrfs-list.c
@@ -1439,15 +1439,11 @@ static void print_all_volume_info(struct root_lookup *sorted_tree,
  	}
  }

-int btrfs_list_subvols(int fd, struct btrfs_list_filter_set *filter_set,
-		       struct btrfs_list_comparer_set *comp_set,
-		       int is_tab_result)
+int btrfs_list_subvols(int fd, struct root_lookup *root_lookup)
  {
-	struct root_lookup root_lookup;
-	struct root_lookup root_sort;
  	int ret;

-	ret = __list_subvol_search(fd, &root_lookup);
+	ret = __list_subvol_search(fd, root_lookup);
  	if (ret) {
  		fprintf(stderr, "ERROR: can't perform the search - %s\n",
  				strerror(errno));
@@ -1458,16 +1454,28 @@ int btrfs_list_subvols(int fd, struct btrfs_list_filter_set *filter_set,
  	 * now we have an rbtree full of root_info objects, but we need to fill
  	 * in their path names within the subvol that is referencing each one.
  	 */
-	ret = __list_subvol_fill_paths(fd, &root_lookup);
-	if (ret < 0)
-		return ret;
+	ret = __list_subvol_fill_paths(fd, root_lookup);
+	return ret;
+}

+int btrfs_list_subvols_print(int fd, struct btrfs_list_filter_set *filter_set,
+		       struct btrfs_list_comparer_set *comp_set,
+		       int is_tab_result)
+{
+	struct root_lookup root_lookup;
+	struct root_lookup root_sort;
+	int ret;
+
+	ret = btrfs_list_subvols(fd, &root_lookup);
+	if (ret)
+		return ret;
  	__filter_and_sort_subvol(&root_lookup, &root_sort, filter_set,
  				 comp_set, fd);

  	print_all_volume_info(&root_sort, is_tab_result);
  	__free_all_subvolumn(&root_lookup);
     Here we forget to free filter and comp_set before..i hope you can add it to your patchset..
     Maybe you can have patch 13...

     if (filter_set)
         btrfs_list_free_filter_set(filter_set);
     if (comp_set)
         btrfs_list_free_comparer_set(comp_set);

     Thanks,
     Wang
-	return ret;
+
+	return 0;
  }

  static int print_one_extent(int fd, struct btrfs_ioctl_search_header *sh,
diff --git a/btrfs-list.h b/btrfs-list.h
index cde4b3c..71fe0f3 100644
--- a/btrfs-list.h
+++ b/btrfs-list.h
@@ -98,7 +98,7 @@ int btrfs_list_setup_comparer(struct btrfs_list_comparer_set **comp_set,
  			      enum btrfs_list_comp_enum comparer,
  			      int is_descending);

-int btrfs_list_subvols(int fd, struct btrfs_list_filter_set *filter_set,
+int btrfs_list_subvols_print(int fd, struct btrfs_list_filter_set *filter_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);
diff --git a/cmds-subvolume.c b/cmds-subvolume.c
index e3cdb1e..c35dff7 100644
--- a/cmds-subvolume.c
+++ b/cmds-subvolume.c
@@ -406,7 +406,7 @@ static int cmd_subvol_list(int argc, char **argv)
  					BTRFS_LIST_FILTER_TOPID_EQUAL,
  					top_id);

-	ret = btrfs_list_subvols(fd, filter_set, comparer_set,
+	ret = btrfs_list_subvols_print(fd, filter_set, comparer_set,
  				is_tab_result);
  	if (ret)
  		return 19;
@@ -613,7 +613,7 @@ 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, 0);
+	ret = btrfs_list_subvols_print(fd, filter_set, NULL, 0);
  	if (ret)
  		return 19;
  	return 0;

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