All of lore.kernel.org
 help / color / mirror / Atom feed
From: Lino Sanfilippo <LinoSanfilippo@gmx.de>
To: eparis@redhat.com
Cc: linux-fsdevel@vger.kernel.org, viro@ZenIV.linux.org.uk,
	Lino Sanfilippo <LinoSanfilippo@gmx.de>
Subject: [PATCH 2/9] fsnotify: introduce fsnotify_get_group()
Date: Tue, 14 Jun 2011 17:29:46 +0200	[thread overview]
Message-ID: <1308065393-29463-3-git-send-email-LinoSanfilippo@gmx.de> (raw)
In-Reply-To: <1308065393-29463-1-git-send-email-LinoSanfilippo@gmx.de>

Introduce fsnotify_get_group() which increments the reference counter of a group.

Signed-off-by: Lino Sanfilippo <LinoSanfilippo@gmx.de>
---
 fs/notify/group.c                |    8 ++++++++
 include/linux/fsnotify_backend.h |    4 +++-
 2 files changed, 11 insertions(+), 1 deletions(-)

diff --git a/fs/notify/group.c b/fs/notify/group.c
index 5e638a2..0fd8f5e 100644
--- a/fs/notify/group.c
+++ b/fs/notify/group.c
@@ -63,6 +63,14 @@ void fsnotify_destroy_group(struct fsnotify_group *group)
 }
 
 /*
+ * Get reference to a group.
+ */
+void fsnotify_get_group(struct fsnotify_group *group)
+{
+	atomic_inc(&group->refcnt);
+}
+
+/*
  * Drop a reference to a group.  Free it if it's through.
  */
 void fsnotify_put_group(struct fsnotify_group *group)
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index 877764a..073b72b 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -360,8 +360,10 @@ static inline void __fsnotify_d_instantiate(struct dentry *dentry, struct inode
 
 /* called from fsnotify listeners, such as fanotify or dnotify */
 
-/* get a reference to an existing or create a new group */
+/* create a new group */
 extern struct fsnotify_group *fsnotify_alloc_group(const struct fsnotify_ops *ops);
+/* get reference to a group */
+extern void fsnotify_get_group(struct fsnotify_group *group);
 /* drop reference on a group from fsnotify_alloc_group */
 extern void fsnotify_put_group(struct fsnotify_group *group);
 /* destroy group */
-- 
1.5.6.5


  parent reply	other threads:[~2011-06-14 15:32 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-06-14 15:29 [PATCH 0/9] fsnotify: change locking order Lino Sanfilippo
2011-06-14 15:29 ` [PATCH 1/9] inotify, fanotify: replace fsnotify_put_group() with fsnotify_destroy_group() Lino Sanfilippo
2011-06-14 15:29 ` Lino Sanfilippo [this message]
2011-06-14 15:29 ` [PATCH 3/9] fsnotify: use reference counting for groups Lino Sanfilippo
2011-06-14 15:29 ` [PATCH 4/9] fsnotify: take groups mark_lock before mark lock Lino Sanfilippo
2011-06-14 15:29 ` [PATCH 5/9] fanotify: add an extra flag to mark_remove_from_mask that indicates wheather a mark should be destroyed Lino Sanfilippo
2011-06-14 15:29 ` [PATCH 6/9] fsnotify: use a mutex instead of a spinlock to protect a groups mark list Lino Sanfilippo
2011-06-14 15:29 ` [PATCH 7/9] fsnotify: pass group to fsnotify_destroy_mark() Lino Sanfilippo
2011-06-14 15:29 ` [PATCH 8/9] fsnotify: introduce locked versions of fsnotify_add_mark() and fsnotify_remove_mark() Lino Sanfilippo
2011-06-14 15:29 ` [PATCH 9/9] fsnotify: dont put marks on temporary list when clearing marks by group Lino Sanfilippo
2011-08-01 20:38 ` [PATCH 0/9] fsnotify: change locking order Eric Paris
2011-08-11 23:13   ` Lino Sanfilippo
2012-03-20 18:49     ` Luis Henriques
2012-03-20 18:58       ` Eric Paris
2012-03-20 19:05         ` Luis Henriques
2012-03-22 22:14         ` Lino Sanfilippo
2012-03-26 11:27         ` Luis Henriques
2012-03-26 15:12           ` Eric Paris
2012-03-26 15:27             ` Luis Henriques
2012-03-26 22:51               ` Lino Sanfilippo

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1308065393-29463-3-git-send-email-LinoSanfilippo@gmx.de \
    --to=linosanfilippo@gmx.de \
    --cc=eparis@redhat.com \
    --cc=linux-fsdevel@vger.kernel.org \
    --cc=viro@ZenIV.linux.org.uk \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.