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authorTejun Heo <tj@kernel.org>2013-11-28 23:54:43 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-11-30 06:16:08 +0400
commit4b93dc9b1c684d0587fe44d36bbfdf45bd3bea9d (patch)
tree99a8124d0407511d6193e286b1a5b6e7d5aafdb2 /fs/namespace.c
parentdf394fb56c64244b30b442e9e02de1a2d9c5a98b (diff)
downloadlinux-4b93dc9b1c684d0587fe44d36bbfdf45bd3bea9d.tar.xz
sysfs, kernfs: prepare mount path for kernfs
We're in the process of separating out core sysfs functionality into kernfs which will deal with sysfs_dirents directly. This patch rearranges mount path so that the kernfs and sysfs parts are separate. * As sysfs_super_info won't be visible outside kernfs proper, kernfs_super_ns() is added to allow kernfs users to access a super_block's namespace tag. * Generic mount operation is separated out into kernfs_mount_ns(). sysfs_mount() now just performs sysfs-specific permission check, acquires namespace tag, and invokes kernfs_mount_ns(). * Generic superblock release is separated out into kernfs_kill_sb() which can be used directly as file_system_type->kill_sb(). As sysfs needs to put the namespace tag, sysfs_kill_sb() wraps kernfs_kill_sb() with ns tag put. * sysfs_dir_cachep init and sysfs_inode_init() are separated out into kernfs_init(). kernfs_init() uses only small amount of memory and trying to handle and propagate kernfs_init() failure doesn't make much sense. Use SLAB_PANIC for sysfs_dir_cachep and make sysfs_inode_init() panic on failure. After this change, kernfs_init() should be called before sysfs_init(), fs/namespace.c::mnt_init() modified accordingly. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: linux-fsdevel@vger.kernel.org Cc: Christoph Hellwig <hch@infradead.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/namespace.c')
-rw-r--r--fs/namespace.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/namespace.c b/fs/namespace.c
index ac2ce8a766e1..a511ea003f89 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -2790,6 +2790,8 @@ void __init mnt_init(void)
for (u = 0; u < HASH_SIZE; u++)
INIT_LIST_HEAD(&mountpoint_hashtable[u]);
+ kernfs_init();
+
err = sysfs_init();
if (err)
printk(KERN_WARNING "%s: sysfs_init error: %d\n",