litmus-rt.git/fs/configfs, branch master

sysfs: Create mountpoints with sysfs_create_mount_point

2015-07-21T17:10:01+00:00

commit f9bb48825a6b5d02f4cabcc78967c75db903dcdc upstream.

This allows for better documentation in the code and
it allows for a simpler and fully correct version of
fs_fully_visible to be written.

The mount points converted and their filesystems are:
/sys/hypervisor/s390/       s390_hypfs
/sys/kernel/config/         configfs
/sys/kernel/debug/          debugfs
/sys/firmware/efi/efivars/  efivarfs
/sys/fs/fuse/connections/   fusectl
/sys/fs/pstore/             pstore
/sys/kernel/tracing/        tracefs
/sys/fs/cgroup/             cgroup
/sys/kernel/security/       securityfs
/sys/fs/selinux/            selinuxfs
/sys/fs/smackfs/            smackfs

Acked-by: Greg Kroah-Hartman 
Signed-off-by: "Eric W. Biederman" 
Signed-off-by: Greg Kroah-Hartman

configfs: init configfs module earlier at boot time

2015-05-06T00:10:11+00:00

We need this earlier in the boot process to allow various subsystems to
use configfs (e.g Industrial IIO).

Also, debugfs is at core_initcall level and configfs should be on the same
level from infrastructure point of view.

Signed-off-by: Daniel Baluta 
Suggested-by: Lars-Peter Clausen 
Reviewed-by: Christoph Hellwig 
Cc: Al Viro 
Cc: Joel Becker 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

VFS: normal filesystems (and lustre): d_inode() annotations

2015-04-15T19:06:57+00:00

that's the bulk of filesystem drivers dealing with inodes of their own

Signed-off-by: David Howells 
Signed-off-by: Al Viro

configfs: Fix inconsistent use of file_inode() vs file->f_path.dentry->d_inode

2015-04-15T19:05:31+00:00

Fix inconsistent use of file_inode() vs file->f_path.dentry->d_inode.

Reported-by: Dan Carpenter 
Signed-off-by: David Howells 
Signed-off-by: Al Viro

configfs: Fix potential NULL d_inode dereference

2015-02-20T09:56:43+00:00

Code that does this:

		if (!(d_unhashed(dentry) && dentry->d_inode)) {
			...
			simple_unlink(parent->d_inode, dentry);
		}

is broken because:

    !(d_unhashed(dentry) && dentry->d_inode)

is equivalent to:

    !d_unhashed(dentry) || !dentry->d_inode

so it is possible to get into simple_unlink() with dentry->d_inode == NULL.

simple_unlink(), however, assumes dentry->d_inode cannot be NULL.

I think that what was meant is this:

    !d_unhashed(dentry) && dentry->d_inode

and that the logical-not operator or the final close-bracket was misplaced.

Signed-off-by: David Howells 
cc: Joel Becker 
Signed-off-by: Al Viro

configfs_add_file: fold into its sole caller

2015-02-18T03:16:46+00:00

Signed-off-by: Al Viro

configfs: fold create_dir() into its only caller

2015-02-18T03:16:35+00:00

Signed-off-by: Al Viro

configfs: configfs_create() init callback is never NULL and it never fails

2015-02-18T03:15:47+00:00

... so make it return void and drop the check for it being non-NULL

Signed-off-by: Al Viro

fs: remove mapping->backing_dev_info

2015-01-20T21:03:05+00:00

Now that we never use the backing_dev_info pointer in struct address_space
we can simply remove it and save 4 to 8 bytes in every inode.

Signed-off-by: Christoph Hellwig 
Acked-by: Ryusuke Konishi 
Reviewed-by: Tejun Heo 
Reviewed-by: Jan Kara 
Signed-off-by: Jens Axboe

fs: introduce f_op->mmap_capabilities for nommu mmap support

2015-01-20T21:02:58+00:00

Since "BDI: Provide backing device capability information [try #3]" the
backing_dev_info structure also provides flags for the kind of mmap
operation available in a nommu environment, which is entirely unrelated
to it's original purpose.

Introduce a new nommu-only file operation to provide this information to
the nommu mmap code instead.  Splitting this from the backing_dev_info
structure allows to remove lots of backing_dev_info instance that aren't
otherwise needed, and entirely gets rid of the concept of providing a
backing_dev_info for a character device.  It also removes the need for
the mtd_inodefs filesystem.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Tejun Heo 
Acked-by: Brian Norris 
Signed-off-by: Jens Axboe