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Subject[git pull] rework of open-related logics
* "do we need fput() or put_filp()" rules are gone - it's always fput() now.
We keep track of that state where it belongs - in ->f_mode.
* int *opened mess killed - in finish_open(), in ->atomic_open() instances
and in fs/namei.c code around do_last()/lookup_open()/atomic_open().
* alloc_file() wrappers with saner calling conventions are introduced
(alloc_file_clone() and alloc_file_pseudo()); callers converted, with
much simplification.
* while we are at it, saner calling conventions for path_init() and
link_path_walk(), simplifying things inside fs/namei.c (both on
open-related paths and elsewhere).

The following changes since commit c7e9075fb89362812059fbf8e25bb4a6e825c4c5:

ocxlflash_getfile(): fix double-iput() on alloc_file() failures (2018-07-10 23:29:03 -0400)

are available in the git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git work.open3

for you to fetch changes up to 5f336e722cc961be94d264d96b90c92888fffae1:

few more cleanups of link_path_walk() callers (2018-07-12 10:04:31 -0400)

----------------------------------------------------------------
Al Viro (40):
fold security_file_free() into file_free()
turn filp_clone_open() into inline wrapper for dentry_open()
create_pipe_files(): use fput() if allocation of the second file fails
make sure do_dentry_open() won't return positive as an error
alloc_file(): switch to passing O_... flags instead of FMODE_... mode
pass creds to get_empty_filp(), make sure dentry_open() passes the right creds
pass ->f_flags value to alloc_empty_file()
get rid of cred argument of vfs_open() and do_dentry_open()
security_file_open(): lose cred argument
->file_open(): lose cred argument
introduce FMODE_OPENED
fold put_filp() into fput()
lift fput() on late failures into path_openat()
now we can fold open_check_o_direct() into do_dentry_open()
switch all remaining checks for FILE_OPENED to FMODE_OPENED
introduce FMODE_CREATED and switch to it
IMA: don't propagate opened through the entire thing
getting rid of 'opened' argument of ->atomic_open() - part 1
getting rid of 'opened' argument of ->atomic_open() - part 2
get rid of 'opened' argument of ->atomic_open() - part 3
get rid of 'opened' in path_openat() and the helpers downstream
->atomic_open(): return 0 in all success cases
document ->atomic_open() changes
switch atomic_open() and lookup_open() to returning 0 in all success cases
kill FILE_{CREATED,OPENED}
new wrapper: alloc_file_pseudo()
__shmem_file_setup(): reorder allocations
... and switch shmem_file_setup() to alloc_file_pseudo()
cxl_getfile(): switch to alloc_file_pseudo()
ocxlflash_getfile(): switch to alloc_file_pseudo()
hugetlb_file_setup(): switch to alloc_file_pseudo()
anon_inode_getfile(): switch to alloc_file_pseudo()
create_pipe_files(): switch the first allocation to alloc_file_pseudo()
new helper: alloc_file_clone()
do_shmat(): grab shp->shm_file earlier, switch to alloc_file_clone()
make alloc_file() static
document alloc_file() changes
make path_init() unconditionally paired with terminate_walk()
allow link_path_walk() to take ERR_PTR()
few more cleanups of link_path_walk() callers

Documentation/filesystems/Locking | 2 +-
Documentation/filesystems/porting | 20 +++
Documentation/filesystems/vfs.txt | 18 +--
drivers/gpu/drm/drm_lease.c | 2 +-
drivers/misc/cxl/api.c | 22 +---
drivers/scsi/cxlflash/ocxl_hw.c | 24 +---
fs/9p/vfs_inode.c | 7 +-
fs/9p/vfs_inode_dotl.c | 7 +-
fs/aio.c | 24 +---
fs/anon_inodes.c | 30 +----
fs/bad_inode.c | 2 +-
fs/binfmt_misc.c | 2 +-
fs/ceph/file.c | 7 +-
fs/ceph/super.h | 3 +-
fs/cifs/cifsfs.h | 3 +-
fs/cifs/dir.c | 7 +-
fs/file_table.c | 85 +++++++++----
fs/fuse/dir.c | 10 +-
fs/gfs2/inode.c | 32 +++--
fs/hugetlbfs/inode.c | 54 +++-----
fs/internal.h | 5 +-
fs/namei.c | 225 +++++++++++++---------------------
fs/nfs/dir.c | 14 ++-
fs/nfs/nfs4_fs.h | 2 +-
fs/nfs/nfs4proc.c | 2 +-
fs/nfsd/vfs.c | 2 +-
fs/open.c | 88 ++++---------
fs/pipe.c | 43 ++-----
include/linux/file.h | 8 +-
include/linux/fs.h | 17 +--
include/linux/ima.h | 4 +-
include/linux/lsm_hooks.h | 2 +-
include/linux/security.h | 5 +-
ipc/shm.c | 45 ++++---
mm/memfd.c | 2 +-
mm/shmem.c | 49 ++------
net/socket.c | 29 +----
security/apparmor/lsm.c | 4 +-
security/integrity/ima/ima.h | 4 +-
security/integrity/ima/ima_appraise.c | 4 +-
security/integrity/ima/ima_main.c | 16 +--
security/security.c | 4 +-
security/selinux/hooks.c | 4 +-
security/smack/smack_lsm.c | 6 +-
security/tomoyo/tomoyo.c | 2 +-
45 files changed, 371 insertions(+), 576 deletions(-)

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