ext4: use sb_issue_zeroout in setup_new_group_blocks

Use sb_issue_zeroout to zero out inode table and descriptor table
blocks instead of old approach which involves journaling.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

1 files changed, 13 insertions, 33 deletions

diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index ca5c8aa00a2f..2f5e347de48b 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -226,23 +226,13 @@ static int setup_new_group_blocks(struct super_block *sb,
         }
 
         /* Zero out all of the reserved backup group descriptor table blocks */
-        for (i = 0, bit = gdblocks + 1, block = start + bit;
-             i < reserved_gdb; i++, block++, bit++) {
-                struct buffer_head *gdb;
-
-                ext4_debug("clear reserved block %#04llx (+%d)\n", block, bit);
-
-                if ((err = extend_or_restart_transaction(handle, 1, bh)))
-                        goto exit_bh;
+        ext4_debug("clear inode table blocks %#04llx -> %#04llx\n",
+                        block, sbi->s_itb_per_group);
+        err = sb_issue_zeroout(sb, gdblocks + start + 1, reserved_gdb,
+                               GFP_NOFS, BLKDEV_IFL_WAIT);
+        if (err)
+                goto exit_bh;
 
-                if (IS_ERR(gdb = bclean(handle, sb, block))) {
-                        err = PTR_ERR(gdb);
-                        goto exit_bh;
-                }
-                ext4_handle_dirty_metadata(handle, NULL, gdb);
-                ext4_set_bit(bit, bh->b_data);
-                brelse(gdb);
-        }
         ext4_debug("mark block bitmap %#04llx (+%llu)\n", input->block_bitmap,
                    input->block_bitmap - start);
         ext4_set_bit(input->block_bitmap - start, bh->b_data);
@@ -251,23 +241,13 @@ static int setup_new_group_blocks(struct super_block *sb,
         ext4_set_bit(input->inode_bitmap - start, bh->b_data);
 
         /* Zero out all of the inode table blocks */
-        for (i = 0, block = input->inode_table, bit = block - start;
-             i < sbi->s_itb_per_group; i++, bit++, block++) {
-                struct buffer_head *it;
-
-                ext4_debug("clear inode block %#04llx (+%d)\n", block, bit);
-
-                if ((err = extend_or_restart_transaction(handle, 1, bh)))
-                        goto exit_bh;
-
-                if (IS_ERR(it = bclean(handle, sb, block))) {
-                        err = PTR_ERR(it);
-                        goto exit_bh;
-                }
-                ext4_handle_dirty_metadata(handle, NULL, it);
-                brelse(it);
-                ext4_set_bit(bit, bh->b_data);
-        }
+        block = input->inode_table;
+        ext4_debug("clear inode table blocks %#04llx -> %#04llx\n",
+                        block, sbi->s_itb_per_group);
+        err = sb_issue_zeroout(sb, block, sbi->s_itb_per_group,
+                               GFP_NOFS, BLKDEV_IFL_WAIT);
+        if (err)
+                goto exit_bh;
 
         if ((err = extend_or_restart_transaction(handle, 2, bh)))
                 goto exit_bh;