Re: [git pull] more vfs bits

[Al Viro <viro@ZenIV.linux.org.uk>]

On Sat, Feb 21, 2015 at 07:16:16PM -0800, Linus Torvalds wrote:
> On Sat, Feb 21, 2015 at 6:51 PM, Al Viro <viro@zeniv.linux.org.uk> wrote:
> >
> > Umm...  Works for me.  Let's do it this way, then:
> >         * rename those guys through the whole series
> >         * leave the "annotate the filesystems" bits to sit in a vfs.git
> > branch
> >         * slap trylock_super() + bugfixes I'd been doing today
> > (procfs and debugfs symlink removals racing with follow_link, oopsable;
> > double-copy in autofs dev_ioctl.c, with length not rechecked after
> > copying, theoretically oopsable + reasonably likely data leak) on top of queue
> >         * feed it through local tests and send an updated pull request later
> > tonight.
> 
> Ok, I guess I can live with that.

Looks like it survived all the local beating so far...

Stuff in there: assorted fixes, multilayer overlayfs from Miklos, beginning
of David's series (long-term goal being to have VFS understand stacking
relationships, rather than kludging that up in a bunch of places; for now
it's mostly infrastructure pieces along with some optimizations that could
be standalone).  Pushed, please pull from the usual place -
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git for-linus

Shortlog:
Al Viro (10):
      switch ll_lookup_finish_locks() and ll_revalidate_it_finish() to inode
      configfs: configfs_create() init callback is never NULL and it never fails
      configfs: fold create_dir() into its only caller
      configfs_add_file: fold into its sole caller
      don't bother with most of the bad_file_ops methods
      hypfs: switch to read_iter/write_iter
      Documentation/filesystems/Locking: ->get_sb() is long gone
      debugfs: leave freeing a symlink body until inode eviction
      procfs: fix race between symlink removals and traversals
      autofs4 copy_dev_ioctl(): keep the value of ->size we'd used for allocation

Bastien Nocera (1):
      coredump: Fix typo in comment

David Howells (14):
      configfs: Fix potential NULL d_inode dereference
      Infiniband: Fix potential NULL d_inode dereference
      VFS: Introduce inode-getting helpers for layered/unioned fs environments
      VFS: Add a whiteout dentry type
      VFS: Add a fallthrough flag for marking virtual dentries
      VFS: Split DCACHE_FILE_TYPE into regular and special types
      Apparmor: mediated_filesystem() should use dentry->d_sb not inode->i_sb
      Apparmor: Use d_is_positive/negative() rather than testing dentry->d_inode
      TOMOYO: Use d_is_dir() rather than d_inode and S_ISDIR()
      Smack: Use d_is_positive() rather than testing dentry->d_inode
      SELinux: Use d_is_positive() rather than testing dentry->d_inode
      VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry)
      Cachefiles: Fix up scripted S_ISDIR/S_ISREG/S_ISLNK conversions
      fanotify: Fix up scripted S_ISDIR/S_ISREG/S_ISLNK conversions

Kinglong Mee (1):
      fs/aio.c: Remove duplicate function name in pr_debug messages

Konstantin Khlebnikov (1):
      trylock_super(): replacement for grab_super_passive()

Miklos Szeredi (16):
      ovl: check whiteout while reading directory
      ovl: make path-type a bitmap
      ovl: dont replace opaque dir
      ovl: add mutli-layer infrastructure
      ovl: helper to iterate layers
      ovl: multi-layer readdir
      ovl: multi-layer lookup
      ovl: check whiteout on lowest layer as well
      ovl: lookup ENAMETOOLONG on lower means ENOENT
      ovl: allow statfs if no upper layer
      ovl: mount: change order of initialization
      ovl: improve mount helpers
      ovl: make upperdir optional
      ovl: support multiple lower layers
      ovl: add testsuite to docs
      ovl: document lower layer ordering

Omar Sandoval (1):
      posix_acl: fix reference leaks in posix_acl_create

Rasmus Villemoes (1):
      autofs4: Wrong format for printing dentry

Seunghun Lee (1):
      ovl: Prevent rw remount when it should be ro mount

hujianyang (5):
      ovl: Cleanup redundant blank lines
      ovl: Use macros to present ovl_xattr
      ovl: Fix kernel panic while mounting overlayfs
      ovl: Fix opaque regression in ovl_lookup
      ovl: discard independent cursor in readdir()

Diffstat:
 Documentation/filesystems/Locking                  |   2 -
 Documentation/filesystems/overlayfs.txt            |  28 +
 arch/s390/hypfs/inode.c                            |  53 +-
 drivers/infiniband/hw/ipath/ipath_fs.c             |   2 +-
 drivers/infiniband/hw/qib/qib_fs.c                 |   2 +-
 drivers/staging/lustre/lustre/llite/dcache.c       |  12 +-
 drivers/staging/lustre/lustre/llite/file.c         |   8 +-
 .../staging/lustre/lustre/llite/llite_internal.h   |   4 +-
 drivers/staging/lustre/lustre/llite/namei.c        |  12 +-
 fs/9p/vfs_inode.c                                  |   2 +-
 fs/aio.c                                           |   6 +-
 fs/autofs4/dev-ioctl.c                             |   8 +-
 fs/autofs4/expire.c                                |   2 +-
 fs/autofs4/root.c                                  |   6 +-
 fs/bad_inode.c                                     | 147 ------
 fs/btrfs/ioctl.c                                   |   4 +-
 fs/cachefiles/daemon.c                             |   4 +-
 fs/cachefiles/interface.c                          |   4 +-
 fs/cachefiles/namei.c                              |  16 +-
 fs/cachefiles/rdwr.c                               |   2 +-
 fs/ceph/dir.c                                      |   2 +-
 fs/ceph/file.c                                     |   2 +-
 fs/coda/dir.c                                      |   2 +-
 fs/configfs/configfs_internal.h                    |   3 +-
 fs/configfs/dir.c                                  |  72 ++-
 fs/configfs/file.c                                 |  28 +-
 fs/configfs/inode.c                                |  12 +-
 fs/coredump.c                                      |   2 +-
 fs/dcache.c                                        |  37 +-
 fs/debugfs/inode.c                                 |  36 +-
 fs/ecryptfs/file.c                                 |   2 +-
 fs/ecryptfs/inode.c                                |   4 +-
 fs/exportfs/expfs.c                                |   2 +-
 fs/fs-writeback.c                                  |   6 +-
 fs/fuse/dir.c                                      |   2 +-
 fs/gfs2/dir.c                                      |   2 +-
 fs/hfsplus/dir.c                                   |   2 +-
 fs/hppfs/hppfs.c                                   |   4 +-
 fs/internal.h                                      |   2 +-
 fs/jffs2/dir.c                                     |  14 +-
 fs/jffs2/super.c                                   |   2 +-
 fs/libfs.c                                         |   2 +-
 fs/namei.c                                         |   2 +-
 fs/namespace.c                                     |  10 +-
 fs/nfsd/nfs4recover.c                              |   4 +-
 fs/nfsd/nfsfh.c                                    |   8 +-
 fs/nfsd/vfs.c                                      |   8 +-
 fs/notify/fanotify/fanotify.c                      |   6 +-
 fs/overlayfs/copy_up.c                             |   5 +-
 fs/overlayfs/dir.c                                 |  34 +-
 fs/overlayfs/inode.c                               |  12 +-
 fs/overlayfs/overlayfs.h                           |  18 +-
 fs/overlayfs/readdir.c                             | 181 +++----
 fs/overlayfs/super.c                               | 564 ++++++++++++++-------
 fs/posix_acl.c                                     |  18 +-
 fs/proc/generic.c                                  |  12 -
 fs/proc/inode.c                                    |  21 +
 fs/proc/internal.h                                 |   1 +
 fs/reiserfs/xattr.c                                |   4 +-
 fs/super.c                                         |  40 +-
 fs/xfs/xfs_ioctl.c                                 |   2 +-
 include/linux/dcache.h                             | 120 ++++-
 mm/shmem.c                                         |   4 +-
 security/apparmor/include/apparmor.h               |   4 +-
 security/apparmor/lsm.c                            |  20 +-
 security/apparmor/path.c                           |   2 +-
 security/inode.c                                   |   2 +-
 security/selinux/hooks.c                           |   8 +-
 security/smack/smack_lsm.c                         |   4 +-
 security/tomoyo/file.c                             |   4 +-
 70 files changed, 924 insertions(+), 758 deletions(-)