Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (96 commits)
  no need for list_for_each_entry_safe()/resetting with superblock list
  Fix sget() race with failing mount
  vfs: don't hold s_umount over close_bdev_exclusive() call
  sysv: do not mark superblock dirty on remount
  sysv: do not mark superblock dirty on mount
  btrfs: remove junk sb_dirt change
  BFS: clean up the superblock usage
  AFFS: wait for sb synchronization when needed
  AFFS: clean up dirty flag usage
  cifs: truncate fallout
  mbcache: fix shrinker function return value
  mbcache: Remove unused features
  add f_flags to struct statfs(64)
  pass a struct path to vfs_statfs
  update VFS documentation for method changes.
  All filesystems that need invalidate_inode_buffers() are doing that explicitly
  convert remaining ->clear_inode() to ->evict_inode()
  Make ->drop_inode() just return whether inode needs to be dropped
  fs/inode.c:clear_inode() is gone
  fs/inode.c:evict() doesn't care about delete vs. non-delete paths now
  ...

Fix up trivial conflicts in fs/nilfs2/super.c

fs/reiserfs/file.c

@@ -38,19 +38,23 @@ static int reiserfs_file_release(struct inode *inode, struct file *filp)
 
 	BUG_ON(!S_ISREG(inode->i_mode));
 
-	/* fast out for when nothing needs to be done */
-	if ((atomic_read(&inode->i_count) > 1 ||
-	     !(REISERFS_I(inode)->i_flags & i_pack_on_close_mask) ||
-	     !tail_has_to_be_packed(inode)) &&
-	    REISERFS_I(inode)->i_prealloc_count <= 0) {
+        if (atomic_add_unless(&REISERFS_I(inode)->openers, -1, 1))
+		return 0;
+
+	mutex_lock(&(REISERFS_I(inode)->tailpack));
+
+        if (!atomic_dec_and_test(&REISERFS_I(inode)->openers)) {
+		mutex_unlock(&(REISERFS_I(inode)->tailpack));
 		return 0;
 	}
 
-	mutex_lock(&inode->i_mutex);
-
-	mutex_lock(&(REISERFS_I(inode)->i_mmap));
-	if (REISERFS_I(inode)->i_flags & i_ever_mapped)
-		REISERFS_I(inode)->i_flags &= ~i_pack_on_close_mask;
+	/* fast out for when nothing needs to be done */
+	if ((!(REISERFS_I(inode)->i_flags & i_pack_on_close_mask) ||
+	     !tail_has_to_be_packed(inode)) &&
+	    REISERFS_I(inode)->i_prealloc_count <= 0) {
+		mutex_unlock(&(REISERFS_I(inode)->tailpack));
+		return 0;
+	}
 
 	reiserfs_write_lock(inode->i_sb);
 	/* freeing preallocation only involves relogging blocks that
@@ -94,9 +98,10 @@ static int reiserfs_file_release(struct inode *inode, struct file *filp)
 	if (!err)
 		err = jbegin_failure;
 
-	if (!err && atomic_read(&inode->i_count) <= 1 &&
+	if (!err &&
 	    (REISERFS_I(inode)->i_flags & i_pack_on_close_mask) &&
 	    tail_has_to_be_packed(inode)) {
+
 		/* if regular file is released by last holder and it has been
 		   appended (we append by unformatted node only) or its direct
 		   item(s) had to be converted, then it may have to be
@@ -104,27 +109,28 @@ static int reiserfs_file_release(struct inode *inode, struct file *filp)
 		err = reiserfs_truncate_file(inode, 0);
 	}
       out:
-	mutex_unlock(&(REISERFS_I(inode)->i_mmap));
-	mutex_unlock(&inode->i_mutex);
 	reiserfs_write_unlock(inode->i_sb);
+	mutex_unlock(&(REISERFS_I(inode)->tailpack));
 	return err;
 }
 
-static int reiserfs_file_mmap(struct file *file, struct vm_area_struct *vma)
+static int reiserfs_file_open(struct inode *inode, struct file *file)
 {
-	struct inode *inode;
-
-	inode = file->f_path.dentry->d_inode;
-	mutex_lock(&(REISERFS_I(inode)->i_mmap));
-	REISERFS_I(inode)->i_flags |= i_ever_mapped;
-	mutex_unlock(&(REISERFS_I(inode)->i_mmap));
-
-	return generic_file_mmap(file, vma);
+	int err = dquot_file_open(inode, file);
+        if (!atomic_inc_not_zero(&REISERFS_I(inode)->openers)) {
+		/* somebody might be tailpacking on final close; wait for it */
+		mutex_lock(&(REISERFS_I(inode)->tailpack));
+		atomic_inc(&REISERFS_I(inode)->openers);
+		mutex_unlock(&(REISERFS_I(inode)->tailpack));
+	}
+	return err;
 }
 
 static void reiserfs_vfs_truncate_file(struct inode *inode)
 {
+	mutex_lock(&(REISERFS_I(inode)->tailpack));
 	reiserfs_truncate_file(inode, 1);
+	mutex_unlock(&(REISERFS_I(inode)->tailpack));
 }
 
 /* Sync a reiserfs file. */
@@ -288,8 +294,8 @@ const struct file_operations reiserfs_file_operations = {
 #ifdef CONFIG_COMPAT
 	.compat_ioctl = reiserfs_compat_ioctl,
 #endif
-	.mmap = reiserfs_file_mmap,
-	.open = dquot_file_open,
+	.mmap = generic_file_mmap,
+	.open = reiserfs_file_open,
 	.release = reiserfs_file_release,
 	.fsync = reiserfs_sync_file,
 	.aio_read = generic_file_aio_read,

fs/reiserfs/inode.c

@@ -25,7 +25,7 @@ int reiserfs_commit_write(struct file *f, struct page *page,
 int reiserfs_prepare_write(struct file *f, struct page *page,
 			   unsigned from, unsigned to);
 
-void reiserfs_delete_inode(struct inode *inode)
+void reiserfs_evict_inode(struct inode *inode)
 {
 	/* We need blocks for transaction + (user+group) quota update (possibly delete) */
 	int jbegin_count =
@@ -35,10 +35,12 @@ void reiserfs_delete_inode(struct inode *inode)
 	int depth;
 	int err;
 
-	if (!is_bad_inode(inode))
+	if (!inode->i_nlink && !is_bad_inode(inode))
 		dquot_initialize(inode);
 
 	truncate_inode_pages(&inode->i_data, 0);
+	if (inode->i_nlink)
+		goto no_delete;
 
 	depth = reiserfs_write_lock_once(inode->i_sb);
 
@@ -77,9 +79,14 @@ void reiserfs_delete_inode(struct inode *inode)
 		;
 	}
       out:
-	clear_inode(inode);	/* note this must go after the journal_end to prevent deadlock */
+	end_writeback(inode);	/* note this must go after the journal_end to prevent deadlock */
+	dquot_drop(inode);
 	inode->i_blocks = 0;
 	reiserfs_write_unlock_once(inode->i_sb, depth);
+
+no_delete:
+	end_writeback(inode);
+	dquot_drop(inode);
 }
 
 static void _make_cpu_key(struct cpu_key *key, int version, __u32 dirid,
@@ -1138,7 +1145,6 @@ static void init_inode(struct inode *inode, struct treepath *path)
 	REISERFS_I(inode)->i_prealloc_count = 0;
 	REISERFS_I(inode)->i_trans_id = 0;
 	REISERFS_I(inode)->i_jl = NULL;
-	mutex_init(&(REISERFS_I(inode)->i_mmap));
 	reiserfs_init_xattr_rwsem(inode);
 
 	if (stat_data_v1(ih)) {
@@ -1841,7 +1847,6 @@ int reiserfs_new_inode(struct reiserfs_transaction_handle *th,
 	REISERFS_I(inode)->i_attrs =
 	    REISERFS_I(dir)->i_attrs & REISERFS_INHERIT_MASK;
 	sd_attrs_to_i_attrs(REISERFS_I(inode)->i_attrs, inode);
-	mutex_init(&(REISERFS_I(inode)->i_mmap));
 	reiserfs_init_xattr_rwsem(inode);
 
 	/* key to search for correct place for new stat data */
@@ -2587,8 +2592,7 @@ static int reiserfs_write_begin(struct file *file,
 		old_ref = th->t_refcount;
 		th->t_refcount++;
 	}
-	ret = block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
-				reiserfs_get_block);
+	ret = __block_write_begin(page, pos, len, reiserfs_get_block);
 	if (ret && reiserfs_transaction_running(inode->i_sb)) {
 		struct reiserfs_transaction_handle *th = current->journal_info;
 		/* this gets a little ugly.  If reiserfs_get_block returned an
@@ -3059,10 +3063,25 @@ static ssize_t reiserfs_direct_IO(int rw, struct kiocb *iocb,
 {
 	struct file *file = iocb->ki_filp;
 	struct inode *inode = file->f_mapping->host;
+	ssize_t ret;
 
-	return blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
+	ret = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
 				  offset, nr_segs,
 				  reiserfs_get_blocks_direct_io, NULL);
+
+	/*
+	 * In case of error extending write may have instantiated a few
+	 * blocks outside i_size. Trim these off again.
+	 */
+	if (unlikely((rw & WRITE) && ret < 0)) {
+		loff_t isize = i_size_read(inode);
+		loff_t end = offset + iov_length(iov, nr_segs);
+
+		if (end > isize)
+			vmtruncate(inode, isize);
+	}
+
+	return ret;
 }
 
 int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
@@ -3072,6 +3091,10 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
 	int depth;
 	int error;
 
+	error = inode_change_ok(inode, attr);
+	if (error)
+		return error;
+
 	/* must be turned off for recursive notify_change calls */
 	ia_valid = attr->ia_valid &= ~(ATTR_KILL_SUID|ATTR_KILL_SGID);
 
@@ -3121,56 +3144,59 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
 		goto out;
 	}
 
-	error = inode_change_ok(inode, attr);
-	if (!error) {
-		if ((ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) ||
-		    (ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) {
-			error = reiserfs_chown_xattrs(inode, attr);
+	if ((ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) ||
+	    (ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) {
+		struct reiserfs_transaction_handle th;
+		int jbegin_count =
+		    2 *
+		    (REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb) +
+		     REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb)) +
+		    2;
 
-			if (!error) {
-				struct reiserfs_transaction_handle th;
-				int jbegin_count =
-				    2 *
-				    (REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb) +
-				     REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb)) +
-				    2;
+		error = reiserfs_chown_xattrs(inode, attr);
 
-				/* (user+group)*(old+new) structure - we count quota info and , inode write (sb, inode) */
-				error =
-				    journal_begin(&th, inode->i_sb,
-						  jbegin_count);
-				if (error)
-					goto out;
-				error = dquot_transfer(inode, attr);
-				if (error) {
-					journal_end(&th, inode->i_sb,
-						    jbegin_count);
-					goto out;
-				}
-				/* Update corresponding info in inode so that everything is in
-				 * one transaction */
-				if (attr->ia_valid & ATTR_UID)
-					inode->i_uid = attr->ia_uid;
-				if (attr->ia_valid & ATTR_GID)
-					inode->i_gid = attr->ia_gid;
-				mark_inode_dirty(inode);
-				error =
-				    journal_end(&th, inode->i_sb, jbegin_count);
-			}
-		}
-		if (!error) {
-			/*
-			 * Relax the lock here, as it might truncate the
-			 * inode pages and wait for inode pages locks.
-			 * To release such page lock, the owner needs the
-			 * reiserfs lock
-			 */
-			reiserfs_write_unlock_once(inode->i_sb, depth);
-			error = inode_setattr(inode, attr);
-			depth = reiserfs_write_lock_once(inode->i_sb);
+		if (error)
+			return error;
+
+		/* (user+group)*(old+new) structure - we count quota info and , inode write (sb, inode) */
+		error = journal_begin(&th, inode->i_sb, jbegin_count);
+		if (error)
+			goto out;
+		error = dquot_transfer(inode, attr);
+		if (error) {
+			journal_end(&th, inode->i_sb, jbegin_count);
+			goto out;
 		}
+
+		/* Update corresponding info in inode so that everything is in
+		 * one transaction */
+		if (attr->ia_valid & ATTR_UID)
+			inode->i_uid = attr->ia_uid;
+		if (attr->ia_valid & ATTR_GID)
+			inode->i_gid = attr->ia_gid;
+		mark_inode_dirty(inode);
+		error = journal_end(&th, inode->i_sb, jbegin_count);
+		if (error)
+			goto out;
 	}
 
+	/*
+	 * Relax the lock here, as it might truncate the
+	 * inode pages and wait for inode pages locks.
+	 * To release such page lock, the owner needs the
+	 * reiserfs lock
+	 */
+	reiserfs_write_unlock_once(inode->i_sb, depth);
+	if ((attr->ia_valid & ATTR_SIZE) &&
+	    attr->ia_size != i_size_read(inode))
+		error = vmtruncate(inode, attr->ia_size);
+
+	if (!error) {
+		setattr_copy(inode, attr);
+		mark_inode_dirty(inode);
+	}
+	depth = reiserfs_write_lock_once(inode->i_sb);
+
 	if (!error && reiserfs_posixacl(inode->i_sb)) {
 		if (attr->ia_valid & ATTR_MODE)
 			error = reiserfs_acl_chmod(inode);

fs/reiserfs/super.c

@@ -525,6 +525,8 @@ static struct inode *reiserfs_alloc_inode(struct super_block *sb)
 	    kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL);
 	if (!ei)
 		return NULL;
+	atomic_set(&ei->openers, 0);
+	mutex_init(&ei->tailpack);
 	return &ei->vfs_inode;
 }
 
@@ -589,11 +591,6 @@ out:
 	reiserfs_write_unlock_once(inode->i_sb, lock_depth);
 }
 
-static void reiserfs_clear_inode(struct inode *inode)
-{
-	dquot_drop(inode);
-}
-
 #ifdef CONFIG_QUOTA
 static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
 				    size_t, loff_t);
@@ -606,8 +603,7 @@ static const struct super_operations reiserfs_sops = {
 	.destroy_inode = reiserfs_destroy_inode,
 	.write_inode = reiserfs_write_inode,
 	.dirty_inode = reiserfs_dirty_inode,
-	.clear_inode = reiserfs_clear_inode,
-	.delete_inode = reiserfs_delete_inode,
+	.evict_inode = reiserfs_evict_inode,
 	.put_super = reiserfs_put_super,
 	.write_super = reiserfs_write_super,
 	.sync_fs = reiserfs_sync_fs,