linux-kernel - [PATCH 2/2] add ->mount function introduction into Documentation/filesystems/vfs.txt

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Date:	Sat, 19 Feb 2011 00:21:38 +0800
From:	Steven Liu <lingjiujianke@...il.com>
To:	viro <viro@...iv.linux.org.uk>
Cc:	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	linux-kernel@...r.kernel.org, liuqi <liuqi@...nderst.com>,
	LiDongyang <jerry87905@...il.com>
Subject: [PATCH 2/2] add ->mount function introduction into Documentation/filesystems/vfs.txt

Hi Alexander Viro,

    add ->mount function introduction into Documentation/filesystems/vfs.txt
    and note that the vfs will replace ->get_sb to ->mount

Signed-off-by: LiuQi <lingjiujianke@...il.com>
---
 Documentation/filesystems/porting |   24 ++++++++++++++++++++++++
 1 files changed, 24 insertions(+), 0 deletions(-)

diff --git a/Documentation/filesystems/porting
b/Documentation/filesystems/porting
index dfbcd1b..9e20eb5 100644
--- a/Documentation/filesystems/porting
+++ b/Documentation/filesystems/porting
@@ -66,6 +66,30 @@ foo_get_sb.
 ---
 [mandatory]

+Newset change of file_system_type method (new mount function ->mount)
+
+*NOTE* linux will replace ->get_sb to ->mount soon.
+the foo_mount function that would return dentry in case of success and negative
+number in case of error (-EINVAL unless you have more informative
error value to
+report).  Call it foo_fill_super().  Now declare
+
+struct dentry *foo_mount(struct file_system_type *fs_type,
+		int flags, const char *dev_name, void *data)
+{
+	return mount_bdev(fs_type, flags, dev_name, data, foo_fill_super);
+}
+
+(or similar with s/bdev/nodev/ or s/bdev/single/, depending on the kind of
+filesystem).
+
+Replace DECLARE_FSTYPE... with explicit initializer and have ->mount set as
+foo_mount.
+
+---
+
+
+[mandatory]
+
 Locking change: ->s_vfs_rename_sem is taken only by cross-directory renames.
 Most likely there is no need to change anything, but if you relied on
 global exclusion between renames for some internal purpose - you need to
-- 
1.7.2



Best Regards
LiuQi
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