nilfs2: use sb instance instead of nilfs_sb_info struct

This replaces sbi uses with direct reference to sb instance.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

1 files changed, 51 insertions, 54 deletions

diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 1368c4293c7f..a8cbd695441e 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -71,23 +71,23 @@ struct kmem_cache *nilfs_transaction_cachep;
 struct kmem_cache *nilfs_segbuf_cachep;
 struct kmem_cache *nilfs_btree_path_cache;
 
-static int nilfs_setup_super(struct nilfs_sb_info *sbi, int is_mount);
+static int nilfs_setup_super(struct super_block *sb, int is_mount);
 static int nilfs_remount(struct super_block *sb, int *flags, char *data);
 
-static void nilfs_set_error(struct nilfs_sb_info *sbi)
+static void nilfs_set_error(struct super_block *sb)
 {
-        struct the_nilfs *nilfs = sbi->s_nilfs;
+        struct the_nilfs *nilfs = NILFS_SB(sb)->s_nilfs;
         struct nilfs_super_block **sbp;
 
         down_write(&nilfs->ns_sem);
         if (!(nilfs->ns_mount_state & NILFS_ERROR_FS)) {
                 nilfs->ns_mount_state |= NILFS_ERROR_FS;
-                sbp = nilfs_prepare_super(sbi, 0);
+                sbp = nilfs_prepare_super(sb, 0);
                 if (likely(sbp)) {
                         sbp[0]->s_state |= cpu_to_le16(NILFS_ERROR_FS);
                         if (sbp[1])
                                 sbp[1]->s_state |= cpu_to_le16(NILFS_ERROR_FS);
-                        nilfs_commit_super(sbi, NILFS_SB_COMMIT_ALL);
+                        nilfs_commit_super(sb, NILFS_SB_COMMIT_ALL);
                 }
         }
         up_write(&nilfs->ns_sem);
@@ -108,7 +108,7 @@ static void nilfs_set_error(struct nilfs_sb_info *sbi)
 void nilfs_error(struct super_block *sb, const char *function,
                  const char *fmt, ...)
 {
-        struct the_nilfs *nilfs = sbi->s_nilfs;
+        struct the_nilfs *nilfs = NILFS_SB(sb)->s_nilfs;
         struct va_format vaf;
         va_list args;
 
@@ -123,7 +123,7 @@ void nilfs_error(struct super_block *sb, const char *function,
         va_end(args);
 
         if (!(sb->s_flags & MS_RDONLY)) {
-                nilfs_set_error(sbi);
+                nilfs_set_error(sb);
 
                 if (nilfs_test_opt(nilfs, ERRORS_RO)) {
                         printk(KERN_CRIT "Remounting filesystem read-only\n");
@@ -188,9 +188,9 @@ void nilfs_destroy_inode(struct inode *inode)
         call_rcu(&inode->i_rcu, nilfs_i_callback);
 }
 
-static int nilfs_sync_super(struct nilfs_sb_info *sbi, int flag)
+static int nilfs_sync_super(struct super_block *sb, int flag)
 {
-        struct the_nilfs *nilfs = sbi->s_nilfs;
+        struct the_nilfs *nilfs = NILFS_SB(sb)->s_nilfs;
         int err;
 
  retry:
@@ -262,10 +262,10 @@ void nilfs_set_log_cursor(struct nilfs_super_block *sbp,
         spin_unlock(&nilfs->ns_last_segment_lock);
 }
 
-struct nilfs_super_block **nilfs_prepare_super(struct nilfs_sb_info *sbi,
+struct nilfs_super_block **nilfs_prepare_super(struct super_block *sb,
                                                int flip)
 {
-        struct the_nilfs *nilfs = sbi->s_nilfs;
+        struct the_nilfs *nilfs = NILFS_SB(sb)->s_nilfs;
         struct nilfs_super_block **sbp = nilfs->ns_sbp;
 
         /* nilfs->ns_sem must be locked by the caller. */
@@ -275,7 +275,7 @@ struct nilfs_super_block **nilfs_prepare_super(struct nilfs_sb_info *sbi,
                         memcpy(sbp[0], sbp[1], nilfs->ns_sbsize);
                 } else {
                         printk(KERN_CRIT "NILFS: superblock broke on dev %s\n",
-                               sbi->s_super->s_id);
+                               sb->s_id);
                         return NULL;
                 }
         } else if (sbp[1] &&
@@ -289,9 +289,9 @@ struct nilfs_super_block **nilfs_prepare_super(struct nilfs_sb_info *sbi,
         return sbp;
 }
 
-int nilfs_commit_super(struct nilfs_sb_info *sbi, int flag)
+int nilfs_commit_super(struct super_block *sb, int flag)
 {
-        struct the_nilfs *nilfs = sbi->s_nilfs;
+        struct the_nilfs *nilfs = NILFS_SB(sb)->s_nilfs;
         struct nilfs_super_block **sbp = nilfs->ns_sbp;
         time_t t;
 
@@ -311,27 +311,28 @@ int nilfs_commit_super(struct nilfs_sb_info *sbi, int flag)
                                             nilfs->ns_sbsize));
         }
         clear_nilfs_sb_dirty(nilfs);
-        return nilfs_sync_super(sbi, flag);
+        return nilfs_sync_super(sb, flag);
 }
 
 /**
  * nilfs_cleanup_super() - write filesystem state for cleanup
- * @sbi: nilfs_sb_info to be unmounted or degraded to read-only
+ * @sb: super block instance to be unmounted or degraded to read-only
  *
  * This function restores state flags in the on-disk super block.
  * This will set "clean" flag (i.e. NILFS_VALID_FS) unless the
  * filesystem was not clean previously.
  */
-int nilfs_cleanup_super(struct nilfs_sb_info *sbi)
+int nilfs_cleanup_super(struct super_block *sb)
 {
+        struct the_nilfs *nilfs = NILFS_SB(sb)->s_nilfs;
         struct nilfs_super_block **sbp;
         int flag = NILFS_SB_COMMIT;
         int ret = -EIO;
 
-        sbp = nilfs_prepare_super(sbi, 0);
+        sbp = nilfs_prepare_super(sb, 0);
         if (sbp) {
-                sbp[0]->s_state = cpu_to_le16(sbi->s_nilfs->ns_mount_state);
-                nilfs_set_log_cursor(sbp[0], sbi->s_nilfs);
+                sbp[0]->s_state = cpu_to_le16(nilfs->ns_mount_state);
+                nilfs_set_log_cursor(sbp[0], nilfs);
                 if (sbp[1] && sbp[0]->s_last_cno == sbp[1]->s_last_cno) {
                         /*
                          * make the "clean" flag also to the opposite
@@ -341,7 +342,7 @@ int nilfs_cleanup_super(struct nilfs_sb_info *sbi)
                         sbp[1]->s_state = sbp[0]->s_state;
                         flag = NILFS_SB_COMMIT_ALL;
                 }
-                ret = nilfs_commit_super(sbi, flag);
+                ret = nilfs_commit_super(sb, flag);
         }
         return ret;
 }
@@ -351,11 +352,11 @@ static void nilfs_put_super(struct super_block *sb)
         struct nilfs_sb_info *sbi = NILFS_SB(sb);
         struct the_nilfs *nilfs = sbi->s_nilfs;
 
-        nilfs_detach_segment_constructor(sbi);
+        nilfs_detach_log_writer(sb);
 
         if (!(sb->s_flags & MS_RDONLY)) {
                 down_write(&nilfs->ns_sem);
-                nilfs_cleanup_super(sbi);
+                nilfs_cleanup_super(sb);
                 up_write(&nilfs->ns_sem);
         }
 
@@ -371,8 +372,7 @@ static void nilfs_put_super(struct super_block *sb)
 
 static int nilfs_sync_fs(struct super_block *sb, int wait)
 {
-        struct nilfs_sb_info *sbi = NILFS_SB(sb);
-        struct the_nilfs *nilfs = sbi->s_nilfs;
+        struct the_nilfs *nilfs = NILFS_SB(sb)->s_nilfs;
         struct nilfs_super_block **sbp;
         int err = 0;
 
@@ -382,10 +382,10 @@ static int nilfs_sync_fs(struct super_block *sb, int wait)
 
         down_write(&nilfs->ns_sem);
         if (nilfs_sb_dirty(nilfs)) {
-                sbp = nilfs_prepare_super(sbi, nilfs_sb_will_flip(nilfs));
+                sbp = nilfs_prepare_super(sb, nilfs_sb_will_flip(nilfs));
                 if (likely(sbp)) {
                         nilfs_set_log_cursor(sbp[0], nilfs);
-                        nilfs_commit_super(sbi, NILFS_SB_COMMIT);
+                        nilfs_commit_super(sb, NILFS_SB_COMMIT);
                 }
         }
         up_write(&nilfs->ns_sem);
@@ -393,10 +393,10 @@ static int nilfs_sync_fs(struct super_block *sb, int wait)
         return err;
 }
 
-int nilfs_attach_checkpoint(struct nilfs_sb_info *sbi, __u64 cno, int curr_mnt,
+int nilfs_attach_checkpoint(struct super_block *sb, __u64 cno, int curr_mnt,
                             struct nilfs_root **rootp)
 {
-        struct the_nilfs *nilfs = sbi->s_nilfs;
+        struct the_nilfs *nilfs = NILFS_SB(sb)->s_nilfs;
         struct nilfs_root *root;
         struct nilfs_checkpoint *raw_cp;
         struct buffer_head *bh_cp;
@@ -425,7 +425,7 @@ int nilfs_attach_checkpoint(struct nilfs_sb_info *sbi, __u64 cno, int curr_mnt,
                 goto failed;
         }
 
-        err = nilfs_ifile_read(sbi->s_super, root, nilfs->ns_inode_size,
+        err = nilfs_ifile_read(sb, root, nilfs->ns_inode_size,
                                &raw_cp->cp_ifile_inode, &root->ifile);
         if (err)
                 goto failed_bh;
@@ -449,8 +449,7 @@ int nilfs_attach_checkpoint(struct nilfs_sb_info *sbi, __u64 cno, int curr_mnt,
 
 static int nilfs_freeze(struct super_block *sb)
 {
-        struct nilfs_sb_info *sbi = NILFS_SB(sb);
-        struct the_nilfs *nilfs = sbi->s_nilfs;
+        struct the_nilfs *nilfs = NILFS_SB(sb)->s_nilfs;
         int err;
 
         if (sb->s_flags & MS_RDONLY)
@@ -458,21 +457,20 @@ static int nilfs_freeze(struct super_block *sb)
 
         /* Mark super block clean */
         down_write(&nilfs->ns_sem);
-        err = nilfs_cleanup_super(sbi);
+        err = nilfs_cleanup_super(sb);
         up_write(&nilfs->ns_sem);
         return err;
 }
 
 static int nilfs_unfreeze(struct super_block *sb)
 {
-        struct nilfs_sb_info *sbi = NILFS_SB(sb);
-        struct the_nilfs *nilfs = sbi->s_nilfs;
+        struct the_nilfs *nilfs = NILFS_SB(sb)->s_nilfs;
 
         if (sb->s_flags & MS_RDONLY)
                 return 0;
 
         down_write(&nilfs->ns_sem);
-        nilfs_setup_super(sbi, false);
+        nilfs_setup_super(sb, false);
         up_write(&nilfs->ns_sem);
         return 0;
 }
@@ -668,15 +666,15 @@ nilfs_set_default_options(struct super_block *sb,
                 NILFS_MOUNT_ERRORS_RO | NILFS_MOUNT_BARRIER;
 }
 
-static int nilfs_setup_super(struct nilfs_sb_info *sbi, int is_mount)
+static int nilfs_setup_super(struct super_block *sb, int is_mount)
 {
-        struct the_nilfs *nilfs = sbi->s_nilfs;
+        struct the_nilfs *nilfs = NILFS_SB(sb)->s_nilfs;
         struct nilfs_super_block **sbp;
         int max_mnt_count;
         int mnt_count;
 
         /* nilfs->ns_sem must be locked by the caller. */
-        sbp = nilfs_prepare_super(sbi, 0);
+        sbp = nilfs_prepare_super(sb, 0);
         if (!sbp)
                 return -EIO;
 
@@ -707,7 +705,7 @@ skip_mount_setup:
         /* synchronize sbp[1] with sbp[0] */
         if (sbp[1])
                 memcpy(sbp[1], sbp[0], nilfs->ns_sbsize);
-        return nilfs_commit_super(sbi, NILFS_SB_COMMIT_ALL);
+        return nilfs_commit_super(sb, NILFS_SB_COMMIT_ALL);
 }
 
 struct nilfs_super_block *nilfs_read_super_block(struct super_block *sb,
@@ -841,7 +839,7 @@ static int nilfs_attach_snapshot(struct super_block *s, __u64 cno,
                 goto out;
         }
 
-        ret = nilfs_attach_checkpoint(NILFS_SB(s), cno, false, &root);
+        ret = nilfs_attach_checkpoint(s, cno, false, &root);
         if (ret) {
                 printk(KERN_ERR "NILFS: error loading snapshot "
                        "(checkpoint number=%llu).\n",
@@ -938,7 +936,7 @@ nilfs_fill_super(struct super_block *sb, void *data, int silent)
         }
         sbi->s_nilfs = nilfs;
 
-        err = init_nilfs(nilfs, sbi, (char *)data);
+        err = init_nilfs(nilfs, sb, (char *)data);
         if (err)
                 goto failed_nilfs;
 
@@ -950,12 +948,12 @@ nilfs_fill_super(struct super_block *sb, void *data, int silent)
         bdi = sb->s_bdev->bd_inode->i_mapping->backing_dev_info;
         sb->s_bdi = bdi ? : &default_backing_dev_info;
 
-        err = load_nilfs(nilfs, sbi);
+        err = load_nilfs(nilfs, sb);
         if (err)
                 goto failed_nilfs;
 
         cno = nilfs_last_cno(nilfs);
-        err = nilfs_attach_checkpoint(sbi, cno, true, &fsroot);
+        err = nilfs_attach_checkpoint(sb, cno, true, &fsroot);
         if (err) {
                 printk(KERN_ERR "NILFS: error loading last checkpoint "
                        "(checkpoint number=%llu).\n", (unsigned long long)cno);
@@ -963,7 +961,7 @@ nilfs_fill_super(struct super_block *sb, void *data, int silent)
         }
 
         if (!(sb->s_flags & MS_RDONLY)) {
-                err = nilfs_attach_segment_constructor(sbi, fsroot);
+                err = nilfs_attach_log_writer(sb, fsroot);
                 if (err)
                         goto failed_checkpoint;
         }
@@ -976,14 +974,14 @@ nilfs_fill_super(struct super_block *sb, void *data, int silent)
 
         if (!(sb->s_flags & MS_RDONLY)) {
                 down_write(&nilfs->ns_sem);
-                nilfs_setup_super(sbi, true);
+                nilfs_setup_super(sb, true);
                 up_write(&nilfs->ns_sem);
         }
 
         return 0;
 
  failed_segctor:
-        nilfs_detach_segment_constructor(sbi);
+        nilfs_detach_log_writer(sb);
 
  failed_checkpoint:
         nilfs_put_root(fsroot);
@@ -1004,8 +1002,7 @@ nilfs_fill_super(struct super_block *sb, void *data, int silent)
 
 static int nilfs_remount(struct super_block *sb, int *flags, char *data)
 {
-        struct nilfs_sb_info *sbi = NILFS_SB(sb);
-        struct the_nilfs *nilfs = sbi->s_nilfs;
+        struct the_nilfs *nilfs = NILFS_SB(sb)->s_nilfs;
         unsigned long old_sb_flags;
         unsigned long old_mount_opt;
         int err;
@@ -1031,8 +1028,8 @@ static int nilfs_remount(struct super_block *sb, int *flags, char *data)
         if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
                 goto out;
         if (*flags & MS_RDONLY) {
-                /* Shutting down the segment constructor */
-                nilfs_detach_segment_constructor(sbi);
+                /* Shutting down log writer */
+                nilfs_detach_log_writer(sb);
                 sb->s_flags |= MS_RDONLY;
 
                 /*
@@ -1040,7 +1037,7 @@ static int nilfs_remount(struct super_block *sb, int *flags, char *data)
                  * the RDONLY flag and then mark the partition as valid again.
                  */
                 down_write(&nilfs->ns_sem);
-                nilfs_cleanup_super(sbi);
+                nilfs_cleanup_super(sb);
                 up_write(&nilfs->ns_sem);
         } else {
                 __u64 features;
@@ -1067,12 +1064,12 @@ static int nilfs_remount(struct super_block *sb, int *flags, char *data)
                 sb->s_flags &= ~MS_RDONLY;
 
                 root = NILFS_I(sb->s_root->d_inode)->i_root;
-                err = nilfs_attach_segment_constructor(sbi, root);
+                err = nilfs_attach_log_writer(sb, root);
                 if (err)
                         goto restore_opts;
 
                 down_write(&nilfs->ns_sem);
-                nilfs_setup_super(sbi, true);
+                nilfs_setup_super(sb, true);
                 up_write(&nilfs->ns_sem);
         }
  out: