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| author | Tejun Heo <tj@kernel.org> | 2013-11-28 20:54:43 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-11-30 03:16:08 +0100 |
| commit | 4b93dc9b1c684d0587fe44d36bbfdf45bd3bea9d (patch) | |
| tree | 99a8124d0407511d6193e286b1a5b6e7d5aafdb2 /fs/namespace.c | |
| parent | sysfs, kernfs: make super_blocks bind to different kernfs_roots (diff) | |
| download | linux-4b93dc9b1c684d0587fe44d36bbfdf45bd3bea9d.tar.xz linux-4b93dc9b1c684d0587fe44d36bbfdf45bd3bea9d.zip | |
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.c | 2 |
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", |