1 files changed, 63 insertions, 46 deletions

diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c
index 534631358b13..a0ebdb17e912 100644
--- a/fs/nilfs2/inode.c
+++ b/fs/nilfs2/inode.c
@@ -13,11 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Ryusuke Konishi <ryusuke@osrg.net>
+ * Written by Ryusuke Konishi.
  *
  */
 
@@ -87,7 +83,7 @@ int nilfs_get_block(struct inode *inode, sector_t blkoff,
 	struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
 	__u64 blknum = 0;
 	int err = 0, ret;
-	unsigned maxblocks = bh_result->b_size >> inode->i_blkbits;
+	unsigned int maxblocks = bh_result->b_size >> inode->i_blkbits;
 
 	down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
 	ret = nilfs_bmap_lookup_contig(ii->i_bmap, blkoff, &blknum, maxblocks);
@@ -133,11 +129,14 @@ int nilfs_get_block(struct inode *inode, sector_t blkoff,
 		/* Error handling should be detailed */
 		set_buffer_new(bh_result);
 		set_buffer_delay(bh_result);
-		map_bh(bh_result, inode->i_sb, 0); /* dbn must be changed
-						      to proper value */
+		map_bh(bh_result, inode->i_sb, 0);
+		/* Disk block number must be changed to proper value */
+
 	} else if (ret == -ENOENT) {
-		/* not found is not error (e.g. hole); must return without
-		   the mapped state flag. */
+		/*
+		 * not found is not error (e.g. hole); must return without
+		 * the mapped state flag.
+		 */
 		;
 	} else {
 		err = ret;
@@ -167,7 +166,7 @@ static int nilfs_readpage(struct file *file, struct page *page)
  * @nr_pages - number of pages to be read
  */
 static int nilfs_readpages(struct file *file, struct address_space *mapping,
-			   struct list_head *pages, unsigned nr_pages)
+			   struct list_head *pages, unsigned int nr_pages)
 {
 	return mpage_readpages(mapping, pages, nr_pages, nilfs_get_block);
 }
@@ -226,7 +225,7 @@ static int nilfs_set_page_dirty(struct page *page)
 	int ret = __set_page_dirty_nobuffers(page);
 
 	if (page_has_buffers(page)) {
-		unsigned nr_dirty = 0;
+		unsigned int nr_dirty = 0;
 		struct buffer_head *bh, *head;
 
 		/*
@@ -249,7 +248,7 @@ static int nilfs_set_page_dirty(struct page *page)
 		if (nr_dirty)
 			nilfs_set_file_dirty(inode, nr_dirty);
 	} else if (ret) {
-		unsigned nr_dirty = 1 << (PAGE_SHIFT - inode->i_blkbits);
+		unsigned int nr_dirty = 1 << (PAGE_SHIFT - inode->i_blkbits);
 
 		nilfs_set_file_dirty(inode, nr_dirty);
 	}
@@ -291,8 +290,8 @@ static int nilfs_write_end(struct file *file, struct address_space *mapping,
 			   struct page *page, void *fsdata)
 {
 	struct inode *inode = mapping->host;
-	unsigned start = pos & (PAGE_SIZE - 1);
-	unsigned nr_dirty;
+	unsigned int start = pos & (PAGE_SIZE - 1);
+	unsigned int nr_dirty;
 	int err;
 
 	nr_dirty = nilfs_page_count_clean_buffers(page, start,
@@ -305,7 +304,7 @@ static int nilfs_write_end(struct file *file, struct address_space *mapping,
 }
 
 static ssize_t
-nilfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter, loff_t offset)
+nilfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
 {
 	struct inode *inode = file_inode(iocb->ki_filp);
 
@@ -313,7 +312,7 @@ nilfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter, loff_t offset)
 		return 0;
 
 	/* Needs synchronization with the cleaner */
-	return blockdev_direct_IO(iocb, inode, iter, offset, nilfs_get_block);
+	return blockdev_direct_IO(iocb, inode, iter, nilfs_get_block);
 }
 
 const struct address_space_operations nilfs_aops = {
@@ -399,23 +398,26 @@ struct inode *nilfs_new_inode(struct inode *dir, umode_t mode)
 
 	err = nilfs_init_acl(inode, dir);
 	if (unlikely(err))
-		goto failed_after_creation; /* never occur. When supporting
-				    nilfs_init_acl(), proper cancellation of
-				    above jobs should be considered */
+		/*
+		 * Never occur.  When supporting nilfs_init_acl(),
+		 * proper cancellation of above jobs should be considered.
+		 */
+		goto failed_after_creation;
 
 	return inode;
 
  failed_after_creation:
 	clear_nlink(inode);
 	unlock_new_inode(inode);
-	iput(inode);  /* raw_inode will be deleted through
-			 nilfs_evict_inode() */
+	iput(inode);  /*
+		       * raw_inode will be deleted through
+		       * nilfs_evict_inode().
+		       */
 	goto failed;
 
  failed_ifile_create_inode:
 	make_bad_inode(inode);
-	iput(inode);  /* if i_nlink == 1, generic_forget_inode() will be
-			 called */
+	iput(inode);
  failed:
 	return ERR_PTR(err);
 }
@@ -666,8 +668,10 @@ void nilfs_write_inode_common(struct inode *inode,
 	else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
 		raw_inode->i_device_code =
 			cpu_to_le64(huge_encode_dev(inode->i_rdev));
-	/* When extending inode, nilfs->ns_inode_size should be checked
-	   for substitutions of appended fields */
+	/*
+	 * When extending inode, nilfs->ns_inode_size should be checked
+	 * for substitutions of appended fields.
+	 */
 }
 
 void nilfs_update_inode(struct inode *inode, struct buffer_head *ibh, int flags)
@@ -685,9 +689,12 @@ void nilfs_update_inode(struct inode *inode, struct buffer_head *ibh, int flags)
 		set_bit(NILFS_I_INODE_SYNC, &ii->i_state);
 
 	nilfs_write_inode_common(inode, raw_inode, 0);
-		/* XXX: call with has_bmap = 0 is a workaround to avoid
-		   deadlock of bmap. This delays update of i_bmap to just
-		   before writing */
+		/*
+		 * XXX: call with has_bmap = 0 is a workaround to avoid
+		 * deadlock of bmap.  This delays update of i_bmap to just
+		 * before writing.
+		 */
+
 	nilfs_ifile_unmap_inode(ifile, ino, ibh);
 }
 
@@ -752,14 +759,15 @@ void nilfs_truncate(struct inode *inode)
 	nilfs_mark_inode_dirty(inode);
 	nilfs_set_file_dirty(inode, 0);
 	nilfs_transaction_commit(sb);
-	/* May construct a logical segment and may fail in sync mode.
-	   But truncate has no return value. */
+	/*
+	 * May construct a logical segment and may fail in sync mode.
+	 * But truncate has no return value.
+	 */
 }
 
 static void nilfs_clear_inode(struct inode *inode)
 {
 	struct nilfs_inode_info *ii = NILFS_I(inode);
-	struct nilfs_mdt_info *mdi = NILFS_MDT(inode);
 
 	/*
 	 * Free resources allocated in nilfs_read_inode(), here.
@@ -768,8 +776,8 @@ static void nilfs_clear_inode(struct inode *inode)
 	brelse(ii->i_bh);
 	ii->i_bh = NULL;
 
-	if (mdi && mdi->mi_palloc_cache)
-		nilfs_palloc_destroy_cache(inode);
+	if (nilfs_is_metadata_file_inode(inode))
+		nilfs_mdt_clear(inode);
 
 	if (test_bit(NILFS_I_BMAP, &ii->i_state))
 		nilfs_bmap_clear(ii->i_bmap);
@@ -811,8 +819,10 @@ void nilfs_evict_inode(struct inode *inode)
 	if (IS_SYNC(inode))
 		nilfs_set_transaction_flag(NILFS_TI_SYNC);
 	nilfs_transaction_commit(sb);
-	/* May construct a logical segment and may fail in sync mode.
-	   But delete_inode has no return value. */
+	/*
+	 * May construct a logical segment and may fail in sync mode.
+	 * But delete_inode has no return value.
+	 */
 }
 
 int nilfs_setattr(struct dentry *dentry, struct iattr *iattr)
@@ -856,6 +866,7 @@ out_err:
 int nilfs_permission(struct inode *inode, int mask)
 {
 	struct nilfs_root *root = NILFS_I(inode)->i_root;
+
 	if ((mask & MAY_WRITE) && root &&
 	    root->cno != NILFS_CPTREE_CURRENT_CNO)
 		return -EROFS; /* snapshot is not writable */
@@ -906,7 +917,7 @@ int nilfs_inode_dirty(struct inode *inode)
 	return ret;
 }
 
-int nilfs_set_file_dirty(struct inode *inode, unsigned nr_dirty)
+int nilfs_set_file_dirty(struct inode *inode, unsigned int nr_dirty)
 {
 	struct nilfs_inode_info *ii = NILFS_I(inode);
 	struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
@@ -919,17 +930,23 @@ int nilfs_set_file_dirty(struct inode *inode, unsigned nr_dirty)
 	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(),
-		   we have to check NILFS_I_QUEUED here, too. */
+		/*
+		 * Because this routine may race with nilfs_dispose_list(),
+		 * we have to check NILFS_I_QUEUED here, too.
+		 */
 		if (list_empty(&ii->i_dirty) && igrab(inode) == NULL) {
-			/* This will happen when somebody is freeing
-			   this inode. */
+			/*
+			 * This will happen when somebody is freeing
+			 * this inode.
+			 */
 			nilfs_warning(inode->i_sb, __func__,
-				      "cannot get inode (ino=%lu)\n",
+				      "cannot get inode (ino=%lu)",
 				      inode->i_ino);
 			spin_unlock(&nilfs->ns_inode_lock);
-			return -EINVAL; /* NILFS_I_DIRTY may remain for
-					   freeing inode */
+			return -EINVAL; /*
+					 * NILFS_I_DIRTY may remain for
+					 * freeing inode.
+					 */
 		}
 		list_move_tail(&ii->i_dirty, &nilfs->ns_dirty_files);
 		set_bit(NILFS_I_QUEUED, &ii->i_state);
@@ -946,7 +963,7 @@ int __nilfs_mark_inode_dirty(struct inode *inode, int flags)
 	err = nilfs_load_inode_block(inode, &ibh);
 	if (unlikely(err)) {
 		nilfs_warning(inode->i_sb, __func__,
-			      "failed to reget inode block.\n");
+			      "failed to reget inode block.");
 		return err;
 	}
 	nilfs_update_inode(inode, ibh, flags);
@@ -973,7 +990,7 @@ void nilfs_dirty_inode(struct inode *inode, int flags)
 
 	if (is_bad_inode(inode)) {
 		nilfs_warning(inode->i_sb, __func__,
-			      "tried to mark bad_inode dirty. ignored.\n");
+			      "tried to mark bad_inode dirty. ignored.");
 		dump_stack();
 		return;
 	}