linux-ext4 - [PATCH V3 08/15] ext4: add a function which sets up a flex groups each time

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Message-Id: <1320707608-14246-9-git-send-email-xiaoqiangnk@gmail.com>
Date:	Tue,  8 Nov 2011 07:13:21 +0800
From:	Yongqiang Yang <xiaoqiangnk@...il.com>
To:	tytso@....edu
Cc:	linux-ext4@...r.kernel.org, Yongqiang Yang <xiaoqiangnk@...il.com>
Subject: [PATCH V3 08/15] ext4: add a function which sets up a flex groups each time

This patch adds a function named ext4_setup_new_descs() which sets up
a flex groups each time.

Signed-off-by: Yongqiang Yang <xiaoqiangnk@...il.com>
---
 fs/ext4/resize.c |   25 +++++++++++++++++++++++--
 1 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index e44b0b8..353cf9b 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -1082,7 +1082,8 @@ static int ext4_add_new_descs(handle_t *handle, struct super_block *sb,
  * @sb: super block
  */
 static int ext4_setup_new_desc(handle_t *handle, struct super_block *sb,
-			       struct ext4_new_group_data *input)
+			       struct ext4_new_group_data *input,
+			       __u16 bg_flags)
 {
 	struct ext4_sb_info *sbi = EXT4_SB(sb);
 	ext4_group_t group;
@@ -1112,7 +1113,7 @@ static int ext4_setup_new_desc(handle_t *handle, struct super_block *sb,
 	ext4_free_group_clusters_set(sb, gdp,
 				     EXT4_B2C(sbi, input->free_blocks_count));
 	ext4_free_inodes_set(sb, gdp, EXT4_INODES_PER_GROUP(sb));
-	gdp->bg_flags = cpu_to_le16(EXT4_BG_INODE_ZEROED);
+	gdp->bg_flags = cpu_to_le16(bg_flags);
 	gdp->bg_checksum = ext4_group_desc_csum(sbi, input->group, gdp);
 
 	err = ext4_handle_dirty_metadata(handle, NULL, gdb_bh);
@@ -1131,6 +1132,26 @@ static int ext4_setup_new_desc(handle_t *handle, struct super_block *sb,
 }
 
 /*
+ * ext4_setup_new_descs setups group descriptors of a flex groups
+ */
+static int ext4_setup_new_descs(handle_t *handle, struct super_block *sb,
+				struct ext4_new_flex_group_data *flex_gd)
+{
+	struct ext4_new_group_data *group_data = flex_gd->groups;
+	__u16 *bg_flags = flex_gd->bg_flags;
+	int i, err = 0;
+
+	for (i = 0; i < flex_gd->count; i++) {
+		err = ext4_setup_new_desc(handle, sb, group_data + i,
+					  bg_flags[i]);
+		if (err)
+			return err;
+	}
+
+	return err;
+}
+
+/*
  * ext4_update_super() updates super so that new the added group can be seen
  *   by the filesystem.
  *
-- 
1.7.5.1

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