nilfs2: move s_inode_lock and s_dirty_files into nilfs object

Moves s_inode_lock spinlock and s_dirty_files list to nilfs object
from nilfs_sb_info structure.

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

6 files changed, 63 insertions, 61 deletions

diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c
index 22a816ba3621..dd5d6d633ea1 100644
--- a/fs/nilfs2/inode.c
+++ b/fs/nilfs2/inode.c
@@ -807,18 +807,18 @@ int nilfs_permission(struct inode *inode, int mask, unsigned int flags)
 
 int nilfs_load_inode_block(struct inode *inode, struct buffer_head **pbh)
 {
-        struct nilfs_sb_info *sbi = NILFS_SB(inode->i_sb);
+        struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
         struct nilfs_inode_info *ii = NILFS_I(inode);
         int err;
 
-        spin_lock(&sbi->s_inode_lock);
+        spin_lock(&nilfs->ns_inode_lock);
         if (ii->i_bh == NULL) {
-                spin_unlock(&sbi->s_inode_lock);
+                spin_unlock(&nilfs->ns_inode_lock);
                 err = nilfs_ifile_get_inode_block(ii->i_root->ifile,
                                                   inode->i_ino, pbh);
                 if (unlikely(err))
                         return err;
-                spin_lock(&sbi->s_inode_lock);
+                spin_lock(&nilfs->ns_inode_lock);
                 if (ii->i_bh == NULL)
                         ii->i_bh = *pbh;
                 else {
@@ -829,36 +829,36 @@ int nilfs_load_inode_block(struct inode *inode, struct buffer_head **pbh)
                 *pbh = ii->i_bh;
 
         get_bh(*pbh);
-        spin_unlock(&sbi->s_inode_lock);
+        spin_unlock(&nilfs->ns_inode_lock);
         return 0;
 }
 
 int nilfs_inode_dirty(struct inode *inode)
 {
         struct nilfs_inode_info *ii = NILFS_I(inode);
-        struct nilfs_sb_info *sbi = NILFS_SB(inode->i_sb);
+        struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
         int ret = 0;
 
         if (!list_empty(&ii->i_dirty)) {
-                spin_lock(&sbi->s_inode_lock);
+                spin_lock(&nilfs->ns_inode_lock);
                 ret = test_bit(NILFS_I_DIRTY, &ii->i_state) ||
                         test_bit(NILFS_I_BUSY, &ii->i_state);
-                spin_unlock(&sbi->s_inode_lock);
+                spin_unlock(&nilfs->ns_inode_lock);
         }
         return ret;
 }
 
 int nilfs_set_file_dirty(struct inode *inode, unsigned nr_dirty)
 {
-        struct nilfs_sb_info *sbi = NILFS_SB(inode->i_sb);
         struct nilfs_inode_info *ii = NILFS_I(inode);
+        struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
 
-        atomic_add(nr_dirty, &sbi->s_nilfs->ns_ndirtyblks);
+        atomic_add(nr_dirty, &nilfs->ns_ndirtyblks);
 
         if (test_and_set_bit(NILFS_I_DIRTY, &ii->i_state))
                 return 0;
 
-        spin_lock(&sbi->s_inode_lock);
+        spin_lock(&nilfs->ns_inode_lock);
         if (!test_bit(NILFS_I_QUEUED, &ii->i_state) &&
             !test_bit(NILFS_I_BUSY, &ii->i_state)) {
                 /* Because this routine may race with nilfs_dispose_list(),
@@ -866,18 +866,18 @@ int nilfs_set_file_dirty(struct inode *inode, unsigned nr_dirty)
                 if (list_empty(&ii->i_dirty) && igrab(inode) == NULL) {
                         /* This will happen when somebody is freeing
                            this inode. */
-                        nilfs_warning(sbi->s_super, __func__,
+                        nilfs_warning(inode->i_sb, __func__,
                                       "cannot get inode (ino=%lu)\n",
                                       inode->i_ino);
-                        spin_unlock(&sbi->s_inode_lock);
+                        spin_unlock(&nilfs->ns_inode_lock);
                         return -EINVAL; /* NILFS_I_DIRTY may remain for
                                            freeing inode */
                 }
                 list_del(&ii->i_dirty);
-                list_add_tail(&ii->i_dirty, &sbi->s_dirty_files);
+                list_add_tail(&ii->i_dirty, &nilfs->ns_dirty_files);
                 set_bit(NILFS_I_QUEUED, &ii->i_state);
         }
-        spin_unlock(&sbi->s_inode_lock);
+        spin_unlock(&nilfs->ns_inode_lock);
         return 0;
 }
 
diff --git a/fs/nilfs2/sb.h b/fs/nilfs2/sb.h
index 0512521ba8a4..3232e75fab75 100644
--- a/fs/nilfs2/sb.h
+++ b/fs/nilfs2/sb.h
@@ -39,10 +39,7 @@ struct nilfs_sb_info {
         struct the_nilfs *s_nilfs;
 
         /* Segment constructor */
-        struct list_head s_dirty_files; /* dirty files list */
         struct nilfs_sc_info *s_sc_info; /* segment constructor info */
-        spinlock_t s_inode_lock;        /* Lock for the nilfs inode.
-                                           It covers s_dirty_files list */
 
         /* Inode allocator */
         spinlock_t s_next_gen_lock;
diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
index a32d9cb2842a..6ac50d811841 100644
--- a/fs/nilfs2/segment.c
+++ b/fs/nilfs2/segment.c
@@ -104,8 +104,7 @@ struct nilfs_sc_operations {
 static void nilfs_segctor_start_timer(struct nilfs_sc_info *);
 static void nilfs_segctor_do_flush(struct nilfs_sc_info *, int);
 static void nilfs_segctor_do_immediate_flush(struct nilfs_sc_info *);
-static void nilfs_dispose_list(struct nilfs_sb_info *, struct list_head *,
-                               int);
+static void nilfs_dispose_list(struct the_nilfs *, struct list_head *, int);
 
 #define nilfs_cnt32_gt(a, b)   \
         (typecheck(__u32, a) && typecheck(__u32, b) && \
@@ -325,14 +324,15 @@ static void nilfs_transaction_lock(struct nilfs_sb_info *sbi,
 static void nilfs_transaction_unlock(struct nilfs_sb_info *sbi)
 {
         struct nilfs_transaction_info *ti = current->journal_info;
+        struct the_nilfs *nilfs = sbi->s_nilfs;
 
         BUG_ON(ti == NULL || ti->ti_magic != NILFS_TI_MAGIC);
         BUG_ON(ti->ti_count > 0);
 
-        up_write(&sbi->s_nilfs->ns_segctor_sem);
+        up_write(&nilfs->ns_segctor_sem);
         current->journal_info = ti->ti_save;
         if (!list_empty(&ti->ti_garbage))
-                nilfs_dispose_list(sbi, &ti->ti_garbage, 0);
+                nilfs_dispose_list(nilfs, &ti->ti_garbage, 0);
 }
 
 static void *nilfs_segctor_map_segsum_entry(struct nilfs_sc_info *sci,
@@ -714,7 +714,7 @@ static void nilfs_lookup_dirty_node_buffers(struct inode *inode,
         }
 }
 
-static void nilfs_dispose_list(struct nilfs_sb_info *sbi,
+static void nilfs_dispose_list(struct the_nilfs *nilfs,
                                struct list_head *head, int force)
 {
         struct nilfs_inode_info *ii, *n;
@@ -722,7 +722,7 @@ static void nilfs_dispose_list(struct nilfs_sb_info *sbi,
         unsigned nv = 0;
 
         while (!list_empty(head)) {
-                spin_lock(&sbi->s_inode_lock);
+                spin_lock(&nilfs->ns_inode_lock);
                 list_for_each_entry_safe(ii, n, head, i_dirty) {
                         list_del_init(&ii->i_dirty);
                         if (force) {
@@ -733,14 +733,14 @@ static void nilfs_dispose_list(struct nilfs_sb_info *sbi,
                         } else if (test_bit(NILFS_I_DIRTY, &ii->i_state)) {
                                 set_bit(NILFS_I_QUEUED, &ii->i_state);
                                 list_add_tail(&ii->i_dirty,
-                                              &sbi->s_dirty_files);
+                                              &nilfs->ns_dirty_files);
                                 continue;
                         }
                         ivec[nv++] = ii;
                         if (nv == SC_N_INODEVEC)
                                 break;
                 }
-                spin_unlock(&sbi->s_inode_lock);
+                spin_unlock(&nilfs->ns_inode_lock);
 
                 for (pii = ivec; nv > 0; pii++, nv--)
                         iput(&(*pii)->vfs_inode);
@@ -773,17 +773,17 @@ static int nilfs_segctor_clean(struct nilfs_sc_info *sci)
 
 static int nilfs_segctor_confirm(struct nilfs_sc_info *sci)
 {
-        struct nilfs_sb_info *sbi = sci->sc_sbi;
+        struct the_nilfs *nilfs = sci->sc_sbi->s_nilfs;
         int ret = 0;
 
-        if (nilfs_test_metadata_dirty(sbi->s_nilfs, sci->sc_root))
+        if (nilfs_test_metadata_dirty(nilfs, sci->sc_root))
                 set_bit(NILFS_SC_DIRTY, &sci->sc_flags);
 
-        spin_lock(&sbi->s_inode_lock);
-        if (list_empty(&sbi->s_dirty_files) && nilfs_segctor_clean(sci))
+        spin_lock(&nilfs->ns_inode_lock);
+        if (list_empty(&nilfs->ns_dirty_files) && nilfs_segctor_clean(sci))
                 ret++;
 
-        spin_unlock(&sbi->s_inode_lock);
+        spin_unlock(&nilfs->ns_inode_lock);
         return ret;
 }
 
@@ -1963,30 +1963,30 @@ static int nilfs_segctor_wait(struct nilfs_sc_info *sci)
         return ret;
 }
 
-static int nilfs_segctor_check_in_files(struct nilfs_sc_info *sci,
-                                        struct nilfs_sb_info *sbi)
+static int nilfs_segctor_collect_dirty_files(struct nilfs_sc_info *sci,
+                                             struct the_nilfs *nilfs)
 {
         struct nilfs_inode_info *ii, *n;
         struct inode *ifile = sci->sc_root->ifile;
 
-        spin_lock(&sbi->s_inode_lock);
+        spin_lock(&nilfs->ns_inode_lock);
  retry:
-        list_for_each_entry_safe(ii, n, &sbi->s_dirty_files, i_dirty) {
+        list_for_each_entry_safe(ii, n, &nilfs->ns_dirty_files, i_dirty) {
                 if (!ii->i_bh) {
                         struct buffer_head *ibh;
                         int err;
 
-                        spin_unlock(&sbi->s_inode_lock);
+                        spin_unlock(&nilfs->ns_inode_lock);
                         err = nilfs_ifile_get_inode_block(
                                 ifile, ii->vfs_inode.i_ino, &ibh);
                         if (unlikely(err)) {
-                                nilfs_warning(sbi->s_super, __func__,
+                                nilfs_warning(sci->sc_super, __func__,
                                               "failed to get inode block.\n");
                                 return err;
                         }
                         nilfs_mdt_mark_buffer_dirty(ibh);
                         nilfs_mdt_mark_dirty(ifile);
-                        spin_lock(&sbi->s_inode_lock);
+                        spin_lock(&nilfs->ns_inode_lock);
                         if (likely(!ii->i_bh))
                                 ii->i_bh = ibh;
                         else
@@ -1999,18 +1999,18 @@ static int nilfs_segctor_check_in_files(struct nilfs_sc_info *sci,
                 list_del(&ii->i_dirty);
                 list_add_tail(&ii->i_dirty, &sci->sc_dirty_files);
         }
-        spin_unlock(&sbi->s_inode_lock);
+        spin_unlock(&nilfs->ns_inode_lock);
 
         return 0;
 }
 
-static void nilfs_segctor_check_out_files(struct nilfs_sc_info *sci,
-                                          struct nilfs_sb_info *sbi)
+static void nilfs_segctor_drop_written_files(struct nilfs_sc_info *sci,
+                                             struct the_nilfs *nilfs)
 {
         struct nilfs_transaction_info *ti = current->journal_info;
         struct nilfs_inode_info *ii, *n;
 
-        spin_lock(&sbi->s_inode_lock);
+        spin_lock(&nilfs->ns_inode_lock);
         list_for_each_entry_safe(ii, n, &sci->sc_dirty_files, i_dirty) {
                 if (!test_and_clear_bit(NILFS_I_UPDATED, &ii->i_state) ||
                     test_bit(NILFS_I_DIRTY, &ii->i_state))
@@ -2022,7 +2022,7 @@ static void nilfs_segctor_check_out_files(struct nilfs_sc_info *sci,
                 list_del(&ii->i_dirty);
                 list_add_tail(&ii->i_dirty, &ti->ti_garbage);
         }
-        spin_unlock(&sbi->s_inode_lock);
+        spin_unlock(&nilfs->ns_inode_lock);
 }
 
 /*
@@ -2038,7 +2038,7 @@ static int nilfs_segctor_do_construct(struct nilfs_sc_info *sci, int mode)
         sci->sc_stage.scnt = NILFS_ST_INIT;
         sci->sc_cno = nilfs->ns_cno;
 
-        err = nilfs_segctor_check_in_files(sci, sbi);
+        err = nilfs_segctor_collect_dirty_files(sci, nilfs);
         if (unlikely(err))
                 goto out;
 
@@ -2116,7 +2116,7 @@ static int nilfs_segctor_do_construct(struct nilfs_sc_info *sci, int mode)
         } while (sci->sc_stage.scnt != NILFS_ST_DONE);
 
  out:
-        nilfs_segctor_check_out_files(sci, sbi);
+        nilfs_segctor_drop_written_files(sci, nilfs);
         return err;
 
  failed_to_write:
@@ -2319,14 +2319,14 @@ int nilfs_construct_dsync_segment(struct super_block *sb, struct inode *inode,
                 return err;
         }
 
-        spin_lock(&sbi->s_inode_lock);
+        spin_lock(&nilfs->ns_inode_lock);
         if (!test_bit(NILFS_I_QUEUED, &ii->i_state) &&
             !test_bit(NILFS_I_BUSY, &ii->i_state)) {
-                spin_unlock(&sbi->s_inode_lock);
+                spin_unlock(&nilfs->ns_inode_lock);
                 nilfs_transaction_unlock(sbi);
                 return 0;
         }
-        spin_unlock(&sbi->s_inode_lock);
+        spin_unlock(&nilfs->ns_inode_lock);
         sci->sc_dsync_inode = ii;
         sci->sc_dsync_start = start;
         sci->sc_dsync_end = end;
@@ -2738,10 +2738,10 @@ static void nilfs_segctor_write_out(struct nilfs_sc_info *sci)
  */
 static void nilfs_segctor_destroy(struct nilfs_sc_info *sci)
 {
-        struct nilfs_sb_info *sbi = sci->sc_sbi;
+        struct the_nilfs *nilfs = sci->sc_sbi->s_nilfs;
         int flag;
 
-        up_write(&sbi->s_nilfs->ns_segctor_sem);
+        up_write(&nilfs->ns_segctor_sem);
 
         spin_lock(&sci->sc_state_lock);
         nilfs_segctor_kill_thread(sci);
@@ -2755,9 +2755,9 @@ static void nilfs_segctor_destroy(struct nilfs_sc_info *sci)
         WARN_ON(!list_empty(&sci->sc_copied_buffers));
 
         if (!list_empty(&sci->sc_dirty_files)) {
-                nilfs_warning(sbi->s_super, __func__,
+                nilfs_warning(sci->sc_super, __func__,
                               "dirty file(s) after the final construction\n");
-                nilfs_dispose_list(sbi, &sci->sc_dirty_files, 1);
+                nilfs_dispose_list(nilfs, &sci->sc_dirty_files, 1);
         }
 
         WARN_ON(!list_empty(&sci->sc_segbufs));
@@ -2765,7 +2765,7 @@ static void nilfs_segctor_destroy(struct nilfs_sc_info *sci)
 
         nilfs_put_root(sci->sc_root);
 
-        down_write(&sbi->s_nilfs->ns_segctor_sem);
+        down_write(&nilfs->ns_segctor_sem);
 
         del_timer_sync(&sci->sc_timer);
         kfree(sci);
@@ -2829,15 +2829,15 @@ void nilfs_detach_segment_constructor(struct nilfs_sb_info *sbi)
         }
 
         /* Force to free the list of dirty files */
-        spin_lock(&sbi->s_inode_lock);
-        if (!list_empty(&sbi->s_dirty_files)) {
-                list_splice_init(&sbi->s_dirty_files, &garbage_list);
+        spin_lock(&nilfs->ns_inode_lock);
+        if (!list_empty(&nilfs->ns_dirty_files)) {
+                list_splice_init(&nilfs->ns_dirty_files, &garbage_list);
                 nilfs_warning(sbi->s_super, __func__,
                               "Non empty dirty list after the last "
                               "segment construction\n");
         }
-        spin_unlock(&sbi->s_inode_lock);
+        spin_unlock(&nilfs->ns_inode_lock);
         up_write(&nilfs->ns_segctor_sem);
 
-        nilfs_dispose_list(sbi, &garbage_list, 1);
+        nilfs_dispose_list(nilfs, &garbage_list, 1);
 }
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 2f17a2f9ef9c..6dc8b3cad127 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -943,9 +943,6 @@ nilfs_fill_super(struct super_block *sb, void *data, int silent)
         if (err)
                 goto failed_nilfs;
 
-        spin_lock_init(&sbi->s_inode_lock);
-        INIT_LIST_HEAD(&sbi->s_dirty_files);
-
         /*
          * Following initialization is overlapped because
          * nilfs_sb_info structure has been cleared at the beginning.
diff --git a/fs/nilfs2/the_nilfs.c b/fs/nilfs2/the_nilfs.c
index d3775336a16c..40239a932dec 100644
--- a/fs/nilfs2/the_nilfs.c
+++ b/fs/nilfs2/the_nilfs.c
@@ -75,7 +75,9 @@ struct the_nilfs *alloc_nilfs(struct block_device *bdev)
         nilfs->ns_bdev = bdev;
         atomic_set(&nilfs->ns_ndirtyblks, 0);
         init_rwsem(&nilfs->ns_sem);
+        INIT_LIST_HEAD(&nilfs->ns_dirty_files);
         INIT_LIST_HEAD(&nilfs->ns_gc_inodes);
+        spin_lock_init(&nilfs->ns_inode_lock);
         spin_lock_init(&nilfs->ns_last_segment_lock);
         nilfs->ns_cptree = RB_ROOT;
         spin_lock_init(&nilfs->ns_cptree_lock);
diff --git a/fs/nilfs2/the_nilfs.h b/fs/nilfs2/the_nilfs.h
index 4a9bf3913c9c..6106ec5ad89a 100644
--- a/fs/nilfs2/the_nilfs.h
+++ b/fs/nilfs2/the_nilfs.h
@@ -71,6 +71,8 @@ enum {
  * @ns_sufile: segusage file inode
  * @ns_cptree: rb-tree of all mounted checkpoints (nilfs_root)
  * @ns_cptree_lock: lock protecting @ns_cptree
+ * @ns_dirty_files: list of dirty files
+ * @ns_inode_lock: lock protecting @ns_dirty_files
  * @ns_gc_inodes: dummy inodes to keep live blocks
  * @ns_mount_opt: mount options
  * @ns_resuid: uid for reserved blocks
@@ -150,6 +152,10 @@ struct the_nilfs {
         struct rb_root          ns_cptree;
         spinlock_t              ns_cptree_lock;
 
+        /* Dirty inode list */
+        struct list_head        ns_dirty_files;
+        spinlock_t              ns_inode_lock;
+
         /* GC inode list */
         struct list_head        ns_gc_inodes;