ext4: init statistics after journal recovery

Currently block/inode/dir counters initialized before journal was
recovered. In fact after journal recovery this info will probably
change. And freeblocks it critical for correct delalloc mode
accounting.

https://bugzilla.kernel.org/show_bug.cgi?id=15768

Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Acked-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

1 files changed, 18 insertions, 22 deletions

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 00d09f58f188..d83cdcbd9b31 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2794,24 +2794,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
         get_random_bytes(&sbi->s_next_generation, sizeof(u32));
         spin_lock_init(&sbi->s_next_gen_lock);
 
-        err = percpu_counter_init(&sbi->s_freeblocks_counter,
-                        ext4_count_free_blocks(sb));
-        if (!err) {
-                err = percpu_counter_init(&sbi->s_freeinodes_counter,
-                                ext4_count_free_inodes(sb));
-        }
-        if (!err) {
-                err = percpu_counter_init(&sbi->s_dirs_counter,
-                                ext4_count_dirs(sb));
-        }
-        if (!err) {
-                err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0);
-        }
-        if (err) {
-                ext4_msg(sb, KERN_ERR, "insufficient memory");
-                goto failed_mount3;
-        }
-
         sbi->s_stripe = ext4_get_stripe_size(sbi);
         sbi->s_max_writeback_mb_bump = 128;
 
@@ -2911,6 +2893,20 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
         set_task_ioprio(sbi->s_journal->j_task, journal_ioprio);
 
 no_journal:
+        err = percpu_counter_init(&sbi->s_freeblocks_counter,
+                                  ext4_count_free_blocks(sb));
+        if (!err)
+                err = percpu_counter_init(&sbi->s_freeinodes_counter,
+                                          ext4_count_free_inodes(sb));
+        if (!err)
+                err = percpu_counter_init(&sbi->s_dirs_counter,
+                                          ext4_count_dirs(sb));
+        if (!err)
+                err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0);
+        if (err) {
+                ext4_msg(sb, KERN_ERR, "insufficient memory");
+                goto failed_mount_wq;
+        }
         if (test_opt(sb, NOBH)) {
                 if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) {
                         ext4_msg(sb, KERN_WARNING, "Ignoring nobh option - "
@@ -3060,6 +3056,10 @@ failed_mount_wq:
                 jbd2_journal_destroy(sbi->s_journal);
                 sbi->s_journal = NULL;
         }
+        percpu_counter_destroy(&sbi->s_freeblocks_counter);
+        percpu_counter_destroy(&sbi->s_freeinodes_counter);
+        percpu_counter_destroy(&sbi->s_dirs_counter);
+        percpu_counter_destroy(&sbi->s_dirtyblocks_counter);
 failed_mount3:
         if (sbi->s_flex_groups) {
                 if (is_vmalloc_addr(sbi->s_flex_groups))
@@ -3067,10 +3067,6 @@ failed_mount3:
                 else
                         kfree(sbi->s_flex_groups);
         }
-        percpu_counter_destroy(&sbi->s_freeblocks_counter);
-        percpu_counter_destroy(&sbi->s_freeinodes_counter);
-        percpu_counter_destroy(&sbi->s_dirs_counter);
-        percpu_counter_destroy(&sbi->s_dirtyblocks_counter);
 failed_mount2:
         for (i = 0; i < db_count; i++)
                 brelse(sbi->s_group_desc[i]);