From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Fasheh Date: Wed, 2 Apr 2008 13:15:01 -0700 Subject: [Ocfs2-devel] [PATCH 51/62] ocfs2: Move /sys/o2cb to /sys/fs/o2cb In-Reply-To: <12071674242631-git-send-email-mfasheh@suse.com> References: <12071673121124-git-send-email-mfasheh@suse.com> <1207167318479-git-send-email-mfasheh@suse.com> <12071673203909-git-send-email-mfasheh@suse.com> <12071673232465-git-send-email-mfasheh@suse.com> <12071673263948-git-send-email-mfasheh@suse.com> <12071673282579-git-send-email-mfasheh@suse.com> <1207167330482-git-send-email-mfasheh@suse.com> <12071673321172-git-send-email-mfasheh@suse.com> <12071673341888-git-send-email-mfasheh@suse.com> <12071673362069-git-send-email-mfasheh@suse.com> <12071673391031-git-send-email-mfasheh@suse.com> <12071673413492-git-send-email-mfasheh@suse.com> <1207167343926-git-send-email-mfasheh@suse.com> <12071673461268-git-send-email-mfasheh@suse.com> <12071673481928-git-send-email-mfasheh@suse.com> <12071673492775-git-send-email-mfasheh@suse.com> <12071673511262-git-send-email-mfasheh@suse.com> <12071673543752-git-send-email-mfasheh@suse.com> <1207167355295-git-send-email-mfasheh@suse.com> <12071673571757-git-send-email-mfasheh@suse.com> <12071673591158-git-send-email-mfasheh@suse.com> <12071673613757-git-send-email-mfasheh@suse.com> <1207167363119-git-send-email-mfasheh@suse.com> <12071673661674-git-send-email-mfasheh@suse.com> <12071673681650-git-send-email-mfasheh@suse.com> <12071673701937-git-send-email-mfasheh@suse.com> <12071673722691-git-send-email-mfasheh@suse.com> <12071673731276-git-send-email-mfasheh@suse.com> <12071673753788-git-send-email-mfasheh@suse.com> <12071673772233-git-send-email-mfasheh@suse.com> <1207167379283-git-send-email-mfasheh@suse.com> <12071673821008-git-send-email-mfasheh@suse.com> <12071673843208-git-send-email-mfasheh@suse.com> <12071673872568-git-send-email-mfasheh@suse.com> <12071673882492-git-send-email-mfasheh@suse.com> <1207167390414-git-send-email-mfasheh@suse.com> <1207167392537-git-send-email-mfasheh@suse.com> <12071673941659-git-send-email-mfasheh@suse.com> <12071673964014-git-send-email-mfasheh@suse.com> <1207167398684-git-send-email-mfasheh@suse.com> <12071674013954-git-send-email-mfasheh@suse.com> <12071674033903-git-send-email-mfasheh@suse.com> <12071674061934-git-send-email-mfasheh@suse.com> <12071674083120-git-send-email-mfasheh@suse.com> <12071674103432-git-send-email-mfasheh@suse.com> <1207167413855-git-send-email-mfasheh@suse.com> <12071674151752-git-send-email-mfasheh@suse.com> <12071674171596-git-send-email-mfasheh@suse.com> <12071674193441-git-send-email-mfasheh@suse.com> <12071674213882-git-send-email-mfasheh@suse.com> <12071674242631-git-send-email-mfasheh@suse.com> Message-ID: <1207167425415-git-send-email-mfasheh@suse.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-kernel@vger.kernel.org Cc: ocfs2-devel@oss.oracle.com, Joel Becker /sys/fs is where we really want file system specific sysfs objects. Ocfs2-tools has been updated to look in /sys/fs/o2cb. We can maintain backwards compatibility with old ocfs2-tools by using a sysfs symlink. After some time (2 years), the symlink can be safely removed. This patch also adds documentation to make it easier for people to figure out what /sys/fs/o2cb is used for. Signed-off-by: Mark Fasheh --- Documentation/ABI/obsolete/o2cb | 11 +++++++++++ Documentation/ABI/stable/o2cb | 10 ++++++++++ Documentation/feature-removal-schedule.txt | 10 ++++++++++ fs/ocfs2/cluster/sys.c | 9 +++++++++ 4 files changed, 40 insertions(+), 0 deletions(-) create mode 100644 Documentation/ABI/obsolete/o2cb create mode 100644 Documentation/ABI/stable/o2cb diff --git a/Documentation/ABI/obsolete/o2cb b/Documentation/ABI/obsolete/o2cb new file mode 100644 index 0000000..9c49d8e --- /dev/null +++ b/Documentation/ABI/obsolete/o2cb @@ -0,0 +1,11 @@ +What: /sys/o2cb symlink +Date: Dec 2005 +KernelVersion: 2.6.16 +Contact: ocfs2-devel at oss.oracle.com +Description: This is a symlink: /sys/o2cb to /sys/fs/o2cb. The symlink will + be removed when new versions of ocfs2-tools which know to look + in /sys/fs/o2cb are sufficiently prevalent. Don't code new + software to look here, it should try /sys/fs/o2cb instead. + See Documentation/ABI/stable/o2cb for more information on usage. +Users: ocfs2-tools. It's sufficient to mail proposed changes to + ocfs2-devel at oss.oracle.com. diff --git a/Documentation/ABI/stable/o2cb b/Documentation/ABI/stable/o2cb new file mode 100644 index 0000000..5eb1545 --- /dev/null +++ b/Documentation/ABI/stable/o2cb @@ -0,0 +1,10 @@ +What: /sys/fs/o2cb/ (was /sys/o2cb) +Date: Dec 2005 +KernelVersion: 2.6.16 +Contact: ocfs2-devel at oss.oracle.com +Description: Ocfs2-tools looks at 'interface-revision' for versioning + information. Each logmask/ file controls a set of debug prints + and can be written into with the strings "allow", "deny", or + "off". Reading the file returns the current state. +Users: ocfs2-tools. It's sufficient to mail proposed changes to + ocfs2-devel at oss.oracle.com. diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt index bf0e3df..4101f1f 100644 --- a/Documentation/feature-removal-schedule.txt +++ b/Documentation/feature-removal-schedule.txt @@ -318,3 +318,13 @@ Why: Not used in-tree. The current out-of-tree users used it to code / infrastructure should be in the kernel and not in some out-of-tree driver. Who: Thomas Gleixner + +--------------------------- + +What: /sys/o2cb symlink +When: January 2010 +Why: /sys/fs/o2cb is the proper location for this information - /sys/o2cb + exists as a symlink for backwards compatibility for old versions of + ocfs2-tools. 2 years should be sufficient time to phase in new versions + which know to look in /sys/fs/o2cb. +Who: ocfs2-devel at oss.oracle.com diff --git a/fs/ocfs2/cluster/sys.c b/fs/ocfs2/cluster/sys.c index 0c095ce..98429fd 100644 --- a/fs/ocfs2/cluster/sys.c +++ b/fs/ocfs2/cluster/sys.c @@ -57,6 +57,7 @@ static struct kset *o2cb_kset; void o2cb_sys_shutdown(void) { mlog_sys_shutdown(); + sysfs_remove_link(NULL, "o2cb"); kset_unregister(o2cb_kset); } @@ -68,6 +69,14 @@ int o2cb_sys_init(void) if (!o2cb_kset) return -ENOMEM; + /* + * Create this symlink for backwards compatibility with old + * versions of ocfs2-tools which look for things in /sys/o2cb. + */ + ret = sysfs_create_link(NULL, &o2cb_kset->kobj, "o2cb"); + if (ret) + goto error; + ret = sysfs_create_group(&o2cb_kset->kobj, &o2cb_attr_group); if (ret) goto error; -- 1.5.4.1