[PATCH 00/87] fs: new accessor methods for atime and mtime

From: Jeff Layton <jlayton@kernel.org>
To: "Alexander Viro" <viro@zeniv.linux.org.uk>,
	"Christian Brauner" <brauner@kernel.org>,
	"Linus Torvalds" <torvalds@linux-foundation.org>,
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	"Martin KaFai Lau" <martin.lau@linux.dev>,
	"Song Liu" <song@kernel.org>,
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	"John Fastabend" <john.fastabend@gmail.com>,
	"KP Singh" <kpsingh@kernel.org>,
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	"Hao Luo" <haoluo@google.com>, "Jiri Olsa" <jolsa@kernel.org>,
	"Hugh Dickins" <hughd@google.com>,
	"Andrew Morton" <akpm@linux-foundation.org>,
	"David S. Miller" <davem@davemloft.net>,
	"Eric Dumazet" <edumazet@google.com>,
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	"Paolo Abeni" <pabeni@redhat.com>,
	"John Johansen" <john.johansen@canonical.com>,
	"Paul Moore" <paul@paul-moore.com>,
	"James Morris" <jmorris@namei.org>,
	"Serge E. Hallyn" <serge@hallyn.com>,
	"Stephen Smalley" <stephen.smalley.work@gmail.com>,
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Subject: [PATCH 00/87] fs: new accessor methods for atime and mtime
Date: Thu, 28 Sep 2023 07:02:59 -0400	[thread overview]
Message-ID: <20230928110300.32891-1-jlayton@kernel.org> (raw)

While working on the multigrain timestamp changes, Linus suggested
adding some similar wrappers for accessing the atime and mtime that we
have for the ctime. With that, we could then move to using discrete
integers instead of timespec64 in struct inode, and shrink it.

Linus suggested using macros for the new accessors, but the existing
ctime wrappers were static inlines and since there are only 3 different
timestamps, I didn't see that trying to fiddle with macros would gain us
anything.

The first patches start with some new infrastructure, and then we move
to converting different subsystems to use it. The second to last patch
makes the conversion to discrete integers, which shaves 8 bytes off of
struct inode on my x86_64 kernel. The last patch reshuffles things a
bit more, to keep the i_lock in the same cacheline as the fields it
protects (at least on x86_64).

About 75% of this conversion was done with coccinelle, with the rest
done by hand with vim.

Jeff Layton (87):
  fs: new accessor methods for atime and mtime
  fs: convert core infrastructure to new {a,m}time accessors
  arch/powerpc/platforms/cell/spufs: convert to new inode {a,m}time
    accessors
  arch/s390/hypfs: convert to new inode {a,m}time accessors
  drivers/android: convert to new inode {a,m}time accessors
  drivers/char: convert to new inode {a,m}time accessors
  drivers/infiniband/hw/qib: convert to new inode {a,m}time accessors
  drivers/misc/ibmasm: convert to new inode {a,m}time accessors
  drivers/misc: convert to new inode {a,m}time accessors
  drivers/platform/x86: convert to new inode {a,m}time accessors
  drivers/tty: convert to new inode {a,m}time accessors
  drivers/usb/core: convert to new inode {a,m}time accessors
  drivers/usb/gadget/function: convert to new inode {a,m}time accessors
  drivers/usb/gadget/legacy: convert to new inode {a,m}time accessors
  fs/9p: convert to new inode {a,m}time accessors
  fs/adfs: convert to new inode {a,m}time accessors
  fs/affs: convert to new inode {a,m}time accessors
  fs/afs: convert to new inode {a,m}time accessors
  fs/autofs: convert to new inode {a,m}time accessors
  fs/befs: convert to new inode {a,m}time accessors
  fs/bfs: convert to new inode {a,m}time accessors
  fs/btrfs: convert to new inode {a,m}time accessors
  fs/ceph: convert to new inode {a,m}time accessors
  fs/coda: convert to new inode {a,m}time accessors
  fs/configfs: convert to new inode {a,m}time accessors
  fs/cramfs: convert to new inode {a,m}time accessors
  fs/debugfs: convert to new inode {a,m}time accessors
  fs/devpts: convert to new inode {a,m}time accessors
  fs/efivarfs: convert to new inode {a,m}time accessors
  fs/efs: convert to new inode {a,m}time accessors
  fs/erofs: convert to new inode {a,m}time accessors
  fs/exfat: convert to new inode {a,m}time accessors
  fs/ext2: convert to new inode {a,m}time accessors
  fs/ext4: convert to new inode {a,m}time accessors
  fs/f2fs: convert to new inode {a,m}time accessors
  fs/fat: convert to new inode {a,m}time accessors
  fs/freevxfs: convert to new inode {a,m}time accessors
  fs/fuse: convert to new inode {a,m}time accessors
  fs/gfs2: convert to new inode {a,m}time accessors
  fs/hfs: convert to new inode {a,m}time accessors
  fs/hfsplus: convert to new inode {a,m}time accessors
  fs/hostfs: convert to new inode {a,m}time accessors
  fs/hpfs: convert to new inode {a,m}time accessors
  fs/hugetlbfs: convert to new inode {a,m}time accessors
  fs/isofs: convert to new inode {a,m}time accessors
  fs/jffs2: convert to new inode {a,m}time accessors
  fs/jfs: convert to new inode {a,m}time accessors
  fs/kernfs: convert to new inode {a,m}time accessors
  fs/minix: convert to new inode {a,m}time accessors
  fs/nfs: convert to new inode {a,m}time accessors
  fs/nfsd: convert to new inode {a,m}time accessors
  fs/nilfs2: convert to new inode {a,m}time accessors
  fs/ntfs: convert to new inode {a,m}time accessors
  fs/ntfs3: convert to new inode {a,m}time accessors
  fs/ocfs2: convert to new inode {a,m}time accessors
  fs/omfs: convert to new inode {a,m}time accessors
  fs/openpromfs: convert to new inode {a,m}time accessors
  fs/orangefs: convert to new inode {a,m}time accessors
  fs/overlayfs: convert to new inode {a,m}time accessors
  fs/proc: convert to new inode {a,m}time accessors
  fs/pstore: convert to new inode {a,m}time accessors
  fs/qnx4: convert to new inode {a,m}time accessors
  fs/qnx6: convert to new inode {a,m}time accessors
  fs/ramfs: convert to new inode {a,m}time accessors
  fs/reiserfs: convert to new inode {a,m}time accessors
  fs/romfs: convert to new inode {a,m}time accessors
  fs/smb/client: convert to new inode {a,m}time accessors
  fs/smb/server: convert to new inode {a,m}time accessors
  fs/squashfs: convert to new inode {a,m}time accessors
  fs/sysv: convert to new inode {a,m}time accessors
  fs/tracefs: convert to new inode {a,m}time accessors
  fs/ubifs: convert to new inode {a,m}time accessors
  fs/udf: convert to new inode {a,m}time accessors
  fs/ufs: convert to new inode {a,m}time accessors
  fs/vboxsf: convert to new inode {a,m}time accessors
  fs/xfs: convert to new inode {a,m}time accessors
  fs/zonefs: convert to new inode {a,m}time accessors
  ipc: convert to new inode {a,m}time accessors
  kernel/bpf: convert to new inode {a,m}time accessors
  mm: convert to new inode {a,m}time accessors
  net/sunrpc: convert to new inode {a,m}time accessors
  security/apparmor: convert to new inode {a,m}time accessors
  security/selinux: convert to new inode {a,m}time accessors
  security: convert to new inode {a,m}time accessors
  fs: rename i_atime and i_mtime fields to __i_atime and __i_mtime
  fs: switch timespec64 fields in inode to discrete integers
  fs: move i_blocks up a few places in struct inode

 arch/powerpc/platforms/cell/spufs/inode.c |  2 +-
 arch/s390/hypfs/inode.c                   |  4 +-
 drivers/android/binderfs.c                |  8 +--
 drivers/char/sonypi.c                     |  2 +-
 drivers/infiniband/hw/qib/qib_fs.c        |  4 +-
 drivers/misc/ibmasm/ibmasmfs.c            |  2 +-
 drivers/misc/ibmvmc.c                     |  2 +-
 drivers/platform/x86/sony-laptop.c        |  2 +-
 drivers/tty/tty_io.c                      | 10 +++-
 drivers/usb/core/devio.c                  | 26 ++++++---
 drivers/usb/gadget/function/f_fs.c        |  4 +-
 drivers/usb/gadget/legacy/inode.c         |  2 +-
 fs/9p/vfs_inode.c                         |  6 +-
 fs/9p/vfs_inode_dotl.c                    | 16 +++---
 fs/adfs/inode.c                           | 13 +++--
 fs/affs/amigaffs.c                        |  4 +-
 fs/affs/inode.c                           | 17 +++---
 fs/afs/dynroot.c                          |  2 +-
 fs/afs/inode.c                            |  8 +--
 fs/afs/write.c                            |  2 +-
 fs/attr.c                                 |  4 +-
 fs/autofs/inode.c                         |  2 +-
 fs/autofs/root.c                          |  6 +-
 fs/bad_inode.c                            |  2 +-
 fs/befs/linuxvfs.c                        | 10 ++--
 fs/bfs/dir.c                              |  9 +--
 fs/bfs/inode.c                            | 10 ++--
 fs/binfmt_misc.c                          |  2 +-
 fs/btrfs/delayed-inode.c                  | 16 +++---
 fs/btrfs/file.c                           | 18 +++---
 fs/btrfs/inode.c                          | 39 ++++++-------
 fs/btrfs/reflink.c                        |  2 +-
 fs/btrfs/transaction.c                    |  3 +-
 fs/btrfs/tree-log.c                       |  8 +--
 fs/ceph/addr.c                            | 10 ++--
 fs/ceph/caps.c                            |  4 +-
 fs/ceph/file.c                            |  2 +-
 fs/ceph/inode.c                           | 60 +++++++++++---------
 fs/ceph/mds_client.c                      |  8 ++-
 fs/ceph/snap.c                            |  4 +-
 fs/coda/coda_linux.c                      |  6 +-
 fs/coda/dir.c                             |  2 +-
 fs/coda/file.c                            |  2 +-
 fs/configfs/inode.c                       |  8 +--
 fs/cramfs/inode.c                         |  4 +-
 fs/debugfs/inode.c                        |  2 +-
 fs/devpts/inode.c                         |  6 +-
 fs/efivarfs/file.c                        |  2 +-
 fs/efivarfs/inode.c                       |  2 +-
 fs/efs/inode.c                            |  5 +-
 fs/erofs/inode.c                          |  3 +-
 fs/exfat/exfat_fs.h                       |  1 +
 fs/exfat/file.c                           |  7 +--
 fs/exfat/inode.c                          | 31 ++++++-----
 fs/exfat/misc.c                           |  8 +++
 fs/exfat/namei.c                          | 31 ++++++-----
 fs/exfat/super.c                          |  4 +-
 fs/ext2/dir.c                             |  6 +-
 fs/ext2/ialloc.c                          |  2 +-
 fs/ext2/inode.c                           | 11 ++--
 fs/ext2/super.c                           |  2 +-
 fs/ext4/ext4.h                            | 20 +++++--
 fs/ext4/extents.c                         | 11 ++--
 fs/ext4/ialloc.c                          |  4 +-
 fs/ext4/inline.c                          |  4 +-
 fs/ext4/inode.c                           | 19 ++++---
 fs/ext4/ioctl.c                           | 13 ++++-
 fs/ext4/namei.c                           | 10 ++--
 fs/ext4/super.c                           |  2 +-
 fs/ext4/xattr.c                           |  6 +-
 fs/f2fs/dir.c                             |  6 +-
 fs/f2fs/f2fs.h                            | 10 ++--
 fs/f2fs/file.c                            | 14 ++---
 fs/f2fs/inline.c                          |  2 +-
 fs/f2fs/inode.c                           | 20 +++----
 fs/f2fs/namei.c                           |  4 +-
 fs/f2fs/recovery.c                        |  8 +--
 fs/f2fs/super.c                           |  2 +-
 fs/fat/inode.c                            | 25 ++++++---
 fs/fat/misc.c                             |  6 +-
 fs/freevxfs/vxfs_inode.c                  |  6 +-
 fs/fuse/control.c                         |  2 +-
 fs/fuse/dir.c                             |  6 +-
 fs/fuse/inode.c                           | 25 ++++-----
 fs/fuse/readdir.c                         |  6 +-
 fs/gfs2/bmap.c                            | 10 ++--
 fs/gfs2/dir.c                             | 10 ++--
 fs/gfs2/glops.c                           | 11 ++--
 fs/gfs2/inode.c                           |  7 ++-
 fs/gfs2/quota.c                           |  2 +-
 fs/gfs2/super.c                           |  8 +--
 fs/hfs/catalog.c                          |  8 +--
 fs/hfs/inode.c                            | 16 +++---
 fs/hfs/sysdep.c                           | 10 ++--
 fs/hfsplus/catalog.c                      |  8 +--
 fs/hfsplus/inode.c                        | 22 ++++----
 fs/hostfs/hostfs_kern.c                   | 12 ++--
 fs/hpfs/dir.c                             | 10 ++--
 fs/hpfs/inode.c                           | 12 ++--
 fs/hpfs/namei.c                           | 20 +++----
 fs/hpfs/super.c                           | 10 ++--
 fs/hugetlbfs/inode.c                      | 10 ++--
 fs/inode.c                                | 35 +++++++-----
 fs/isofs/inode.c                          |  4 +-
 fs/isofs/rock.c                           | 18 +++---
 fs/jffs2/dir.c                            | 35 +++++++-----
 fs/jffs2/file.c                           |  4 +-
 fs/jffs2/fs.c                             | 20 +++----
 fs/jffs2/os-linux.h                       |  4 +-
 fs/jfs/inode.c                            |  2 +-
 fs/jfs/jfs_imap.c                         | 16 +++---
 fs/jfs/jfs_inode.c                        |  2 +-
 fs/jfs/namei.c                            | 20 ++++---
 fs/jfs/super.c                            |  2 +-
 fs/kernfs/inode.c                         |  6 +-
 fs/libfs.c                                | 41 ++++++++++----
 fs/minix/bitmap.c                         |  2 +-
 fs/minix/dir.c                            |  6 +-
 fs/minix/inode.c                          | 15 +++--
 fs/minix/itree_common.c                   |  2 +-
 fs/nfs/callback_proc.c                    |  2 +-
 fs/nfs/fscache.h                          |  4 +-
 fs/nfs/inode.c                            | 30 +++++-----
 fs/nfsd/blocklayout.c                     |  3 +-
 fs/nfsd/nfs3proc.c                        |  4 +-
 fs/nfsd/nfs4proc.c                        |  8 +--
 fs/nfsd/nfsctl.c                          |  2 +-
 fs/nilfs2/dir.c                           |  6 +-
 fs/nilfs2/inode.c                         | 16 +++---
 fs/nsfs.c                                 |  2 +-
 fs/ntfs/inode.c                           | 25 +++++----
 fs/ntfs/mft.c                             |  2 +-
 fs/ntfs3/file.c                           |  6 +-
 fs/ntfs3/frecord.c                        | 11 ++--
 fs/ntfs3/inode.c                          | 22 +++++---
 fs/ntfs3/namei.c                          |  4 +-
 fs/ocfs2/alloc.c                          |  2 +-
 fs/ocfs2/aops.c                           |  6 +-
 fs/ocfs2/dir.c                            |  5 +-
 fs/ocfs2/dlmfs/dlmfs.c                    |  4 +-
 fs/ocfs2/dlmglue.c                        | 29 +++++-----
 fs/ocfs2/file.c                           | 26 +++++----
 fs/ocfs2/inode.c                          | 24 ++++----
 fs/ocfs2/namei.c                          |  8 +--
 fs/ocfs2/refcounttree.c                   |  4 +-
 fs/omfs/inode.c                           |  8 +--
 fs/openpromfs/inode.c                     |  4 +-
 fs/orangefs/orangefs-utils.c              | 16 +++---
 fs/overlayfs/file.c                       |  9 ++-
 fs/overlayfs/inode.c                      |  3 +-
 fs/overlayfs/util.c                       |  4 +-
 fs/pipe.c                                 |  2 +-
 fs/proc/base.c                            |  2 +-
 fs/proc/inode.c                           |  2 +-
 fs/proc/proc_sysctl.c                     |  2 +-
 fs/proc/self.c                            |  2 +-
 fs/proc/thread_self.c                     |  2 +-
 fs/pstore/inode.c                         |  5 +-
 fs/qnx4/inode.c                           |  6 +-
 fs/qnx6/inode.c                           |  6 +-
 fs/ramfs/inode.c                          |  7 ++-
 fs/reiserfs/inode.c                       | 22 +++-----
 fs/reiserfs/namei.c                       |  8 +--
 fs/reiserfs/stree.c                       |  5 +-
 fs/reiserfs/super.c                       |  2 +-
 fs/romfs/super.c                          |  3 +-
 fs/smb/client/file.c                      | 18 +++---
 fs/smb/client/fscache.h                   |  6 +-
 fs/smb/client/inode.c                     | 17 +++---
 fs/smb/client/smb2ops.c                   |  6 +-
 fs/smb/server/smb2pdu.c                   |  8 +--
 fs/squashfs/inode.c                       |  6 +-
 fs/stack.c                                |  4 +-
 fs/stat.c                                 |  4 +-
 fs/sysv/dir.c                             |  6 +-
 fs/sysv/ialloc.c                          |  2 +-
 fs/sysv/inode.c                           | 10 ++--
 fs/sysv/itree.c                           |  2 +-
 fs/tracefs/inode.c                        |  2 +-
 fs/ubifs/debug.c                          |  8 +--
 fs/ubifs/dir.c                            | 23 +++++---
 fs/ubifs/file.c                           | 16 +++---
 fs/ubifs/journal.c                        |  8 +--
 fs/ubifs/super.c                          |  8 +--
 fs/udf/ialloc.c                           |  4 +-
 fs/udf/inode.c                            | 38 +++++++------
 fs/udf/namei.c                            | 16 +++---
 fs/ufs/dir.c                              |  6 +-
 fs/ufs/ialloc.c                           |  2 +-
 fs/ufs/inode.c                            | 36 +++++++-----
 fs/vboxsf/utils.c                         | 15 ++---
 fs/xfs/libxfs/xfs_inode_buf.c             | 10 ++--
 fs/xfs/libxfs/xfs_rtbitmap.c              |  6 +-
 fs/xfs/libxfs/xfs_trans_inode.c           |  2 +-
 fs/xfs/xfs_bmap_util.c                    |  7 ++-
 fs/xfs/xfs_inode.c                        |  4 +-
 fs/xfs/xfs_inode_item.c                   |  4 +-
 fs/xfs/xfs_iops.c                         |  8 +--
 fs/xfs/xfs_itable.c                       |  8 +--
 fs/xfs/xfs_rtalloc.c                      | 30 +++++-----
 fs/zonefs/super.c                         | 10 ++--
 include/linux/fs.h                        | 68 +++++++++++++++++++++--
 include/linux/fs_stack.h                  |  6 +-
 ipc/mqueue.c                              | 19 ++++---
 kernel/bpf/inode.c                        |  5 +-
 mm/shmem.c                                | 20 +++----
 net/sunrpc/rpc_pipe.c                     |  2 +-
 security/apparmor/apparmorfs.c            |  7 ++-
 security/apparmor/policy_unpack.c         |  4 +-
 security/inode.c                          |  2 +-
 security/selinux/selinuxfs.c              |  2 +-
 211 files changed, 1115 insertions(+), 906 deletions(-)

-- 
2.41.0