linux-ext4 - [PATCH 1/2] ext4: rename journal_dev to s_journal_dev inside ext4_sb

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Date:   Wed, 29 Jul 2020 14:19:20 +0800
From:   brookxu <brookxu.cn@...il.com>
To:     tytso@....edu, adilger.kernel@...ger.ca
Cc:     linux-ext4@...r.kernel.org
Subject: [PATCH 1/2] ext4: rename journal_dev to s_journal_dev inside
 ext4_sb_info

Rename journal_dev to s_journal_dev inside ext4_sb_info, keep
the naming rules consistent with other variables, which is
convenient for code reading and writing.

Signed-off-by: Chunguang Xu <brookxu@...cent.com>
---
 fs/ext4/ext4.h  |  2 +-
 fs/ext4/fsmap.c |  8 ++++----
 fs/ext4/super.c | 14 +++++++-------
 3 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 68e0ebe..8ca9adf 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1463,7 +1463,7 @@ struct ext4_sb_info {
     unsigned long s_commit_interval;
     u32 s_max_batch_time;
     u32 s_min_batch_time;
-    struct block_device *journal_bdev;
+    struct block_device *s_journal_bdev;
 #ifdef CONFIG_QUOTA
     /* Names of quota files with journalled quota */
     char __rcu *s_qf_names[EXT4_MAXQUOTAS];
diff --git a/fs/ext4/fsmap.c b/fs/ext4/fsmap.c
index dbccf46..005c0ae 100644
--- a/fs/ext4/fsmap.c
+++ b/fs/ext4/fsmap.c
@@ -571,8 +571,8 @@ static bool ext4_getfsmap_is_valid_device(struct super_block *sb,
     if (fm->fmr_device == 0 || fm->fmr_device == UINT_MAX ||
         fm->fmr_device == new_encode_dev(sb->s_bdev->bd_dev))
         return true;
-    if (EXT4_SB(sb)->journal_bdev &&
-        fm->fmr_device == new_encode_dev(EXT4_SB(sb)->journal_bdev->bd_dev))
+    if (EXT4_SB(sb)->s_journal_bdev &&
+        fm->fmr_device == new_encode_dev(EXT4_SB(sb)->s_journal_bdev->bd_dev))
         return true;
     return false;
 }
@@ -642,9 +642,9 @@ int ext4_getfsmap(struct super_block *sb, struct ext4_fsmap_head *head,
     memset(handlers, 0, sizeof(handlers));
     handlers[0].gfd_dev = new_encode_dev(sb->s_bdev->bd_dev);
     handlers[0].gfd_fn = ext4_getfsmap_datadev;
-    if (EXT4_SB(sb)->journal_bdev) {
+    if (EXT4_SB(sb)->s_journal_bdev) {
         handlers[1].gfd_dev = new_encode_dev(
-                EXT4_SB(sb)->journal_bdev->bd_dev);
+                EXT4_SB(sb)->s_journal_bdev->bd_dev);
         handlers[1].gfd_fn = ext4_getfsmap_logdev;
     }
 
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 8ce61f3..f785aee7 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -935,10 +935,10 @@ static void ext4_blkdev_put(struct block_device *bdev)
 static void ext4_blkdev_remove(struct ext4_sb_info *sbi)
 {
     struct block_device *bdev;
-    bdev = sbi->journal_bdev;
+    bdev = sbi->s_journal_bdev;
     if (bdev) {
         ext4_blkdev_put(bdev);
-        sbi->journal_bdev = NULL;
+        sbi->s_journal_bdev = NULL;
     }
 }
 
@@ -1069,14 +1069,14 @@ static void ext4_put_super(struct super_block *sb)
 
     sync_blockdev(sb->s_bdev);
     invalidate_bdev(sb->s_bdev);
-    if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) {
+    if (sbi->s_journal_bdev && sbi->s_journal_bdev != sb->s_bdev) {
         /*
          * Invalidate the journal device's buffers.  We don't want them
          * floating about in memory - the physical journal device may
          * hotswapped, and it breaks the `ro-after' testing code.
          */
-        sync_blockdev(sbi->journal_bdev);
-        invalidate_bdev(sbi->journal_bdev);
+        sync_blockdev(sbi->s_journal_bdev);
+        invalidate_bdev(sbi->s_journal_bdev);
         ext4_blkdev_remove(sbi);
     }
 
@@ -3712,7 +3712,7 @@ int ext4_calculate_overhead(struct super_block *sb)
      * Add the internal journal blocks whether the journal has been
      * loaded or not
      */
-    if (sbi->s_journal && !sbi->journal_bdev)
+    if (sbi->s_journal && !sbi->s_journal_bdev)
         overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen);
     else if (ext4_has_feature_journal(sb) && !sbi->s_journal && j_inum) {
         /* j_inum for internal journal is non-zero */
@@ -5057,7 +5057,7 @@ static journal_t *ext4_get_dev_journal(struct super_block *sb,
             be32_to_cpu(journal->j_superblock->s_nr_users));
         goto out_journal;
     }
-    EXT4_SB(sb)->journal_bdev = bdev;
+    EXT4_SB(sb)->s_journal_bdev = bdev;
     ext4_init_journal_params(sb, journal);
     return journal;
 
-- 
1.8.3.1