[git pull] vfs.git pile 1

From: Al Viro
Date: Sun Oct 12 2014 - 19:24:21 EST

The big thing in this pile is Eric's unmount-on-rmdir series; we finally
have everything we need for that. The final piece of prereqs is delayed
mntput() - now filesystem shutdown always happens on shallow stack.
Other than that, we have several new primitives for iov_iter (Matt Wilcox,
culled from his XIP-related series) pushing the conversion to ->read_iter()/
->write_iter() a bit more, a bunch of fs/dcache.c cleanups and fixes
(including the external name refcounting, which gives consistent behaviour
of d_move() wrt procfs symlinks for long and short names alike) and
assorted cleanups and fixes all over the place.

This is just the first pile; there's a lot of stuff from various people that
ought to go in this window. Starting with unionmount/overlayfs mess... ;-/

Please, pull from the usual place:
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git for-linus

Shortlog:
Al Viro (38):
missing data dependency barrier in prepend_name()
Allow sharing external names after __d_move()
delayed mntput
d_prune_alias(): just lock the parent and call __dentry_kill()
dcache.c: call ->d_prune() regardless of d_unhashed()
handle suicide on late failure exits in execve() in search_binary_handler()
constify file_inode()
[jffs2] kill wbuf_queued/wbuf_dwork_lock
cifs: switch to use of %p[dD]
9p: switch to %p[dD]
ashmem: use vfs_llseek()
vme: don't open-code fixed_size_llseek()
cachefiles_write_page(): switch to __kernel_write()
carma-fpga: switch to fixed_size_llseek()
carma-fpga: switch to simple_read_from_buffer()
rsxx debugfs inanity
dma-buf: don't open-code atomic_long_read()
switch /dev/zero and /dev/full to ->read_iter()
switch hci_vhci to ->write_iter()
switch logger to ->write_iter()
switch /dev/kmsg to ->write_iter()
saner perf_atoll()
missing annotation in fs/file.c
nouveau: __iomem misannotations
android: ->f_op is never NULL
ecryptfs: ->f_op is never NULL
[s390] remove pointless assignment of ->f_op in vmlogrdr ->open()
jfs: don't hash direct inode
f_fs: saner API for ffs_sb_create_file()
gadgetfs: saner API for gadgetfs_create_file()
[infiniband] remove pointless assignments
gfs2_atomic_open(): skip lookups on hashed dentry
ncpfs: use list_for_each_entry() for d_subdirs walk
fix misuses of f_count() in ppp and netlink
let path_init() failures treated the same way as subsequent link_path_walk()
take dname_external() into fs/dcache.c
don't need that forward declaration of struct nameidata in dcache.h anymore
reiserfs: remove pointless forward declaration of struct nameidata

Daeseok Youn (1):
dcache: Fix no spaces at the start of a line in dcache.c

Eric Biggers (2):
vfs: Deduplicate code shared by xattr system calls operating on paths
fs/file_table.c: Update alloc_file() comment

Eric W. Biederman (12):
vfs: Document the effect of d_revalidate on d_find_alias
vfs: More precise tests in d_invalidate
vfs: Don't allow overwriting mounts in the current mount namespace
vfs: Keep a list of mounts on a mount point
vfs: factor out lookup_mountpoint from new_mountpoint
vfs: Add a function to lazily unmount all mounts from any dentry.
vfs: Lazily remove mounts on unlinked files and directories.
vfs: Remove unnecessary calls of check_submounts_and_drop
vfs: Merge check_submounts_and_drop and d_invalidate
vfs: Make d_invalidate return void
vfs: Remove d_drop calls from d_revalidate implementations
proc: Update proc_flush_task_mnt to use d_invalidate

Ian Kent (1):
autofs - remove obsolete d_invalidate() from expire

Kirill Smelkov (1):
vfs: fix typo in s_op->alloc_inode() documentation

Matthew Wilcox (1):
Add copy_to_iter(), copy_from_iter() and iov_iter_zero()

Mikulas Patocka (1):
fs: make cont_expand_zero interruptible

Seunghun Lee (1):
vfs: move getname() from callers to do_mount()

Tetsuo Handa (1):
fs: Fix theoretical division by 0 in super_cache_scan().

Tim Gardner (1):
fs: namespace: suppress 'may be used uninitialized' warnings

Diffstat:
Documentation/filesystems/vfs.txt | 2 +-
arch/alpha/kernel/osf_sys.c | 23 ++-
arch/x86/ia32/ia32_aout.c | 21 +--
drivers/block/rsxx/core.c | 81 ++--------
drivers/bluetooth/hci_vhci.c | 22 +--
drivers/char/mem.c | 56 ++-----
drivers/dma-buf/dma-buf.c | 2 +-
drivers/gpu/drm/nouveau/nouveau_nvif.c | 4 +-
drivers/gpu/drm/nouveau/nvif/driver.h | 4 +-
drivers/gpu/drm/nouveau/nvif/object.h | 6 +-
drivers/infiniband/hw/ipath/ipath_fs.c | 1 -
drivers/infiniband/hw/qib/qib_fs.c | 1 -
drivers/misc/carma/carma-fpga-program.c | 30 +---
drivers/net/ppp/ppp_generic.c | 2 +-
drivers/s390/char/vmlogrdr.c | 1 -
drivers/staging/android/ashmem.c | 2 +-
drivers/staging/android/ion/compat_ion.c | 2 +-
drivers/staging/android/logger.c | 103 +++---------
drivers/staging/vme/devices/vme_user.c | 28 +---
drivers/usb/gadget/function/f_fs.c | 24 ++-
drivers/usb/gadget/legacy/inode.c | 26 ++-
fs/9p/fid.c | 4 +-
fs/9p/vfs_addr.c | 4 +-
fs/9p/vfs_dentry.c | 8 +-
fs/9p/vfs_dir.c | 4 +-
fs/9p/vfs_file.c | 8 +-
fs/9p/vfs_inode.c | 32 ++--
fs/9p/vfs_inode_dotl.c | 8 +-
fs/afs/dir.c | 5 -
fs/autofs4/expire.c | 6 -
fs/binfmt_aout.c | 25 +--
fs/binfmt_elf.c | 25 +--
fs/binfmt_elf_fdpic.c | 24 +--
fs/btrfs/ioctl.c | 5 +-
fs/buffer.c | 5 +
fs/cachefiles/rdwr.c | 48 +++---
fs/ceph/dir.c | 1 -
fs/cifs/dir.c | 14 +-
fs/cifs/file.c | 12 +-
fs/cifs/inode.c | 12 +-
fs/cifs/readdir.c | 6 +-
fs/compat.c | 28 ++--
fs/dcache.c | 259 +++++++++++++++---------------
fs/ecryptfs/file.c | 2 +-
fs/exec.c | 17 +-
fs/file.c | 1 +
fs/file_table.c | 12 +-
fs/fuse/dir.c | 7 +-
fs/gfs2/dentry.c | 3 -
fs/gfs2/inode.c | 5 +
fs/internal.h | 2 +-
fs/jffs2/jffs2_fs_sb.h | 2 -
fs/jffs2/wbuf.c | 17 +-
fs/jfs/super.c | 2 +-
fs/kernfs/dir.c | 11 --
fs/mount.h | 25 ++-
fs/namei.c | 27 ++--
fs/namespace.c | 203 ++++++++++++++++-------
fs/ncpfs/dir.c | 6 +-
fs/ncpfs/ncplib_kernel.h | 14 +-
fs/nfs/dir.c | 7 +-
fs/proc/base.c | 10 +-
fs/proc/fd.c | 2 -
fs/read_write.c | 2 +
fs/reiserfs/xattr.h | 1 -
fs/super.c | 2 +
fs/xattr.c | 116 +++++--------
include/linux/dcache.h | 9 +-
include/linux/fs.h | 5 +-
include/linux/uio.h | 3 +
kernel/printk/printk.c | 20 +--
mm/iov_iter.c | 240 +++++++++++++++++++++++++--
net/netlink/af_netlink.c | 2 +-
tools/perf/util/string.c | 90 ++++-------
74 files changed, 889 insertions(+), 960 deletions(-)
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