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Commit 8d753182 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs 

Pull filesystem fixes from Jan Kara:
 "Notification, writeback, udf, quota fixes

  The notification patches are (with one exception) a fallout of my
  fsnotify rework which went into -rc1 (I've extented LTP to cover these
  cornercases to avoid similar breakage in future).

  The UDF patch is a nasty data corruption Al has recently reported,
  the revert of the writeback patch is due to possibility of violating
  sync(2) guarantees, and a quota bug can lead to corruption of quota
  files in ocfs2"

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  fsnotify: Allocate overflow events with proper type
  fanotify: Handle overflow in case of permission events
  fsnotify: Fix detection whether overflow event is queued
  Revert "writeback: do not sync data dirtied after sync start"
  quota: Fix race between dqput() and dquot_scan_active()
  udf: Fix data corruption on file type conversion
  inotify: Fix reporting of cookies for inotify events
parents bb7d43b1 ff57cd58

fs/fs-writeback.c

+11 −22
Original line number Diff line number Diff line
@@ -40,18 +40,13 @@ 
struct wb_writeback_work {

	long nr_pages;

	struct super_block *sb;

	/*

	 * Write only inodes dirtied before this time. Don't forget to set

	 * older_than_this_is_set when you set this.

	 */

	unsigned long older_than_this;

	unsigned long *older_than_this;

	enum writeback_sync_modes sync_mode;

	unsigned int tagged_writepages:1;

	unsigned int for_kupdate:1;

	unsigned int range_cyclic:1;

	unsigned int for_background:1;

	unsigned int for_sync:1;	/* sync(2) WB_SYNC_ALL writeback */

	unsigned int older_than_this_is_set:1;

	enum wb_reason reason;		/* why was writeback initiated? */



	struct list_head list;		/* pending work list */
@@ -252,10 +247,10 @@ static int move_expired_inodes(struct list_head *delaying_queue, 
	int do_sb_sort = 0;

	int moved = 0;



	WARN_ON_ONCE(!work->older_than_this_is_set);

	while (!list_empty(delaying_queue)) {

		inode = wb_inode(delaying_queue->prev);

		if (inode_dirtied_after(inode, work->older_than_this))

		if (work->older_than_this &&

		    inode_dirtied_after(inode, *work->older_than_this))

			break;

		list_move(&inode->i_wb_list, &tmp);

		moved++;
@@ -742,8 +737,6 @@ static long writeback_inodes_wb(struct bdi_writeback *wb, long nr_pages, 
		.sync_mode	= WB_SYNC_NONE,

		.range_cyclic	= 1,

		.reason		= reason,

		.older_than_this = jiffies,

		.older_than_this_is_set = 1,

	};



	spin_lock(&wb->list_lock);
@@ -802,13 +795,12 @@ static long wb_writeback(struct bdi_writeback *wb, 
{

	unsigned long wb_start = jiffies;

	long nr_pages = work->nr_pages;

	unsigned long oldest_jif;

	struct inode *inode;

	long progress;



	if (!work->older_than_this_is_set) {

		work->older_than_this = jiffies;

		work->older_than_this_is_set = 1;

	}

	oldest_jif = jiffies;

	work->older_than_this = &oldest_jif;



	spin_lock(&wb->list_lock);

	for (;;) {
@@ -842,10 +834,10 @@ static long wb_writeback(struct bdi_writeback *wb, 
		 * safe.

		 */

		if (work->for_kupdate) {

			work->older_than_this = jiffies -

			oldest_jif = jiffies -

				msecs_to_jiffies(dirty_expire_interval * 10);

		} else if (work->for_background)

			work->older_than_this = jiffies;

			oldest_jif = jiffies;



		trace_writeback_start(wb->bdi, work);

		if (list_empty(&wb->b_io))
@@ -1358,20 +1350,17 @@ EXPORT_SYMBOL(try_to_writeback_inodes_sb); 
/**

 * sync_inodes_sb	-	sync sb inode pages

 * @sb: the superblock

 * @older_than_this:	timestamp

 *

 * This function writes and waits on any dirty inode belonging to this

 * superblock that has been dirtied before given timestamp.

 * super_block.

 */

void sync_inodes_sb(struct super_block *sb, unsigned long older_than_this)

void sync_inodes_sb(struct super_block *sb)

{

	DECLARE_COMPLETION_ONSTACK(done);

	struct wb_writeback_work work = {

		.sb		= sb,

		.sync_mode	= WB_SYNC_ALL,

		.nr_pages	= LONG_MAX,

		.older_than_this = older_than_this,

		.older_than_this_is_set = 1,

		.range_cyclic	= 0,

		.done		= &done,

		.reason		= WB_REASON_SYNC,

fs/notify/dnotify/dnotify.c

+1 −1
Original line number Diff line number Diff line
@@ -86,7 +86,7 @@ static int dnotify_handle_event(struct fsnotify_group *group, 
				struct fsnotify_mark *inode_mark,

				struct fsnotify_mark *vfsmount_mark,

				u32 mask, void *data, int data_type,

				const unsigned char *file_name)

				const unsigned char *file_name, u32 cookie)

{

	struct dnotify_mark *dn_mark;

	struct dnotify_struct *dn;

fs/notify/fanotify/fanotify.c

+5 −3
Original line number Diff line number Diff line
@@ -147,7 +147,7 @@ static int fanotify_handle_event(struct fsnotify_group *group, 
				 struct fsnotify_mark *inode_mark,

				 struct fsnotify_mark *fanotify_mark,

				 u32 mask, void *data, int data_type,

				 const unsigned char *file_name)

				 const unsigned char *file_name, u32 cookie)

{

	int ret = 0;

	struct fanotify_event_info *event;
@@ -192,10 +192,12 @@ static int fanotify_handle_event(struct fsnotify_group *group, 


	ret = fsnotify_add_notify_event(group, fsn_event, fanotify_merge);

	if (ret) {

		BUG_ON(mask & FAN_ALL_PERM_EVENTS);

		/* Permission events shouldn't be merged */

		BUG_ON(ret == 1 && mask & FAN_ALL_PERM_EVENTS);

		/* Our event wasn't used in the end. Free it. */

		fsnotify_destroy_event(group, fsn_event);

		ret = 0;



		return 0;

	}



#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS

fs/notify/fanotify/fanotify_user.c

+13 −0
Original line number Diff line number Diff line
@@ -698,6 +698,7 @@ SYSCALL_DEFINE2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags) 
	struct fsnotify_group *group;

	int f_flags, fd;

	struct user_struct *user;

	struct fanotify_event_info *oevent;



	pr_debug("%s: flags=%d event_f_flags=%d\n",

		__func__, flags, event_f_flags);
@@ -730,8 +731,20 @@ SYSCALL_DEFINE2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags) 
	group->fanotify_data.user = user;

	atomic_inc(&user->fanotify_listeners);



	oevent = kmem_cache_alloc(fanotify_event_cachep, GFP_KERNEL);

	if (unlikely(!oevent)) {

		fd = -ENOMEM;

		goto out_destroy_group;

	}

	group->overflow_event = &oevent->fse;

	fsnotify_init_event(group->overflow_event, NULL, FS_Q_OVERFLOW);

	oevent->tgid = get_pid(task_tgid(current));

	oevent->path.mnt = NULL;

	oevent->path.dentry = NULL;



	group->fanotify_data.f_flags = event_f_flags;

#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS

	oevent->response = 0;

	mutex_init(&group->fanotify_data.access_mutex);

	init_waitqueue_head(&group->fanotify_data.access_waitq);

	INIT_LIST_HEAD(&group->fanotify_data.access_list);

fs/notify/fsnotify.c

+1 −1
Original line number Diff line number Diff line
@@ -179,7 +179,7 @@ static int send_to_group(struct inode *to_tell, 


	return group->ops->handle_event(group, to_tell, inode_mark,

					vfsmount_mark, mask, data, data_is,

					file_name);

					file_name, cookie);

}



/*