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Christoph Hellwig c03cea4214 iomap: add initial support for writes without buffer heads 
For now just limited to blocksize == PAGE_SIZE, where we can simply read
in the full page in write begin, and just set the whole page dirty after
copying data into it.  This code is enabled by default and XFS will now
be feed pages without buffer heads in ->writepage and ->writepages.

If a file system sets the IOMAP_F_BUFFER_HEAD flag on the iomap the old
path will still be used, this both helps the transition in XFS and
prepares for the gfs2 migration to the iomap infrastructure.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2018-06-20 09:32:41 -07:00
..
9p
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
adfs
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
affs
affs: fix potential memory leak when parsing option 'prefix'
2018-05-28 12:36:41 +02:00
afs
Merge branch 'afs-proc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2018-06-16 16:32:04 +09:00
autofs
autofs: Fix typo s/thenew new/the new/ in AUTOFS4_FS description
2018-06-12 12:31:19 -07:00
befs
fix a series of Documentation/ broken file name references
2018-06-15 18:10:01 -03:00
bfs
bfs_add_entry: pass name/len as qstr pointer
2018-05-22 14:27:50 -04:00
btrfs
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
cachefiles
Merge branch 'hch.procfs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2018-06-04 10:00:01 -07:00
ceph
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
cifs
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
coda
vfs: change inode times to use struct timespec64
2018-06-05 16:57:31 -07:00
configfs
vfs: change inode times to use struct timespec64
2018-06-05 16:57:31 -07:00
cramfs
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
crypto
f2fs-for-4.18-rc1
2018-06-11 10:16:13 -07:00
debugfs
Revert "debugfs: inode: debugfs_create_dir uses mode permission from parent"
2018-06-12 20:52:16 -07:00
devpts
devpts: comment devpts_mntget()
2018-03-14 13:31:23 +01:00
dlm
treewide: Use array_size() in vmalloc()
2018-06-12 16:19:22 -07:00
ecryptfs
Merge branch 'fixes' of https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs into aio-base
2018-05-26 09:16:25 +02:00
efivarfs
efivarfs: Limit the rate for non-root to read files
2018-02-22 10:21:02 -08:00
efs
…
exofs
exofs: avoid VLA in structures
2018-06-15 07:55:24 +09:00
exportfs
ovl: do not try to reconnect a disconnected origin dentry
2018-04-12 12:04:49 +02:00
ext2
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
ext4
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
f2fs
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
fat
Merge branch 'akpm' (patches from Andrew)
2018-06-15 08:51:42 +09:00
freevxfs
freevxfs_lookup(): use d_splice_alias()
2018-05-22 14:27:51 -04:00
fscache
proc: introduce proc_create_single{,_data}
2018-05-16 07:23:35 +02:00
fuse
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
gfs2
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
hfs
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
hfsplus
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
hostfs
vfs: change inode times to use struct timespec64
2018-06-05 16:57:31 -07:00
hpfs
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
hugetlbfs
hugetlbfs: fix bug in pgoff overflow checking
2018-04-05 21:36:21 -07:00
isofs
isofs: fix potential memory leak in mount option parsing
2018-04-16 09:47:41 +02:00
jbd2
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
jffs2
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
jfs
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
kernfs
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
lockd
net: Drop pernet_operations::async
2018-03-27 13:18:09 -04:00
minix
minix_lookup: use d_splice_alias()
2018-05-22 14:27:52 -04:00
nfs
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
nfs_common
net: Drop pernet_operations::async
2018-03-27 13:18:09 -04:00
nfsd
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
nilfs2
do d_instantiate/unlock_new_inode combinations safely
2018-05-11 15:36:37 -04:00
nls
…
notify
fsnotify: add fsnotify_add_inode_mark() wrappers
2018-05-18 14:58:22 +02:00
ntfs
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
ocfs2
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
omfs
omfs_lookup(): report IO errors, use d_splice_alias()
2018-05-22 14:27:58 -04:00
openpromfs
openpromfs: switch to d_splice_alias()
2018-05-22 14:27:57 -04:00
orangefs
Solve a series of broken links for files under Documentation:
2018-06-17 05:25:18 +09:00
overlayfs
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
proc
Merge branch 'afs-proc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2018-06-16 16:32:04 +09:00
pstore
pstore: Remove bogus format string definition
2018-06-14 14:57:24 +02:00
qnx4
qnx4_lookup: use d_splice_alias()
2018-05-22 14:27:52 -04:00
qnx6
qnx6_lookup: switch to d_splice_alias()
2018-05-22 14:27:54 -04:00
quota
fs: quota: Replace GFP_ATOMIC with GFP_KERNEL in dquot_init
2018-04-09 17:48:54 +02:00
ramfs
…
reiserfs
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
romfs
romfs_lookup: switch to d_splice_alias()
2018-05-22 14:27:55 -04:00
squashfs
…
sysfs
unfuck sysfs_mount()
2018-05-21 14:30:09 -04:00
sysv
sysv_lookup: use d_splice_alias()
2018-05-22 14:27:53 -04:00
tracefs
…
ubifs
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
udf
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
ufs
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
xfs
iomap: add initial support for writes without buffer heads
2018-06-20 09:32:41 -07:00
aio.c
aio: only return events requested in poll_mask() for IOCB_CMD_POLL
2018-06-14 20:08:14 -04:00
anon_inodes.c
…
attr.c
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
bad_inode.c
vfs: change inode times to use struct timespec64
2018-06-05 16:57:31 -07:00
binfmt_aout.c
exec: introduce finalize_exec() before start_thread()
2018-04-11 10:28:37 -07:00
binfmt_elf_fdpic.c
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
binfmt_elf.c
coredump: fix spam with zero VMA process
2018-06-15 07:55:24 +09:00
binfmt_em86.c
…
binfmt_flat.c
exec: introduce finalize_exec() before start_thread()
2018-04-11 10:28:37 -07:00
binfmt_misc.c
docs: Fix more broken references
2018-06-15 18:11:26 -03:00
binfmt_script.c
…
block_dev.c
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
buffer.c
iomap: mark newly allocated buffer heads as new
2018-06-19 15:10:55 -07:00
char_dev.c
block, char_dev: Use correct format specifier for unsigned ints
2018-03-15 17:59:24 +01:00
compat_binfmt_elf.c
…
compat_ioctl.c
autofs: clean up includes
2018-06-07 17:34:40 -07:00
compat.c
ncpfs: remove compat functionality
2018-06-05 19:23:26 +02:00
coredump.c
…
d_path.c
split d_path() and friends into a separate file
2018-03-29 15:07:46 -04:00
dax.c
libnvdimm for 4.18
2018-06-08 17:21:52 -07:00
dcache.c
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2018-06-04 10:14:28 -07:00
dcookies.c
fs: add do_lookup_dcookie() helper; remove in-kernel call to syscall
2018-04-02 20:15:39 +02:00
direct-io.c
block: consistently use GFP_NOIO instead of __GFP_NORECLAIM
2018-05-14 08:55:18 -06:00
drop_caches.c
…
eventfd.c
eventfd: only return events requested in poll_mask()
2018-06-14 20:07:38 -04:00
eventpoll.c
eventpoll: switch to ->poll_mask
2018-06-14 20:09:28 -04:00
exec.c
Merge branch 'core-rseq-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-06-10 10:17:09 -07:00
fcntl.c
mm: restructure memfd code
2018-06-07 17:34:35 -07:00
fhandle.c
vfs: Copy struct mount.mnt_id to userspace using put_user()
2018-01-15 12:07:51 -08:00
file_table.c
…
file.c
fs: add ksys_close() wrapper; remove in-kernel calls to sys_close()
2018-04-02 20:16:00 +02:00
filesystems.c
proc: introduce proc_create_single{,_data}
2018-05-16 07:23:35 +02:00
fs_pin.c
…
fs_struct.c
…
fs-writeback.c
bdi: Fix oops in wb_workfn()
2018-05-03 16:11:37 -06:00
inode.c
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
internal.h
fs: factor out a __generic_write_end helper
2018-06-19 15:10:55 -07:00
ioctl.c
fs: Allow CAP_SYS_ADMIN in s_user_ns to freeze and thaw filesystems
2018-05-24 12:04:28 -05:00
iomap.c
iomap: add initial support for writes without buffer heads
2018-06-20 09:32:41 -07:00
Kconfig
autofs: remove left-over autofs4 stubs
2018-06-11 08:22:34 -07:00
Kconfig.binfmt
docs: Fix more broken references
2018-06-15 18:11:26 -03:00
libfs.c
fs, dax: prepare for dax-specific address_space_operations
2018-03-30 11:34:55 -07:00
locks.c
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
Makefile
autofs: remove left-over autofs4 stubs
2018-06-11 08:22:34 -07:00
mbcache.c
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
mount.h
…
mpage.c
…
namei.c
Merge branch 'afs-proc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2018-06-16 16:32:04 +09:00
namespace.c
fs: Allow superblock owner to access do_remount_sb()
2018-05-24 12:02:25 -05:00
no-block.c
…
nsfs.c
net: Export open_related_ns()
2018-02-15 15:34:42 -05:00
open.c
Revert "fs: fold open_check_o_direct into do_dentry_open"
2018-06-03 10:58:23 -07:00
pipe.c
pipe: convert to ->poll_mask
2018-05-26 09:16:44 +02:00
pnode.c
…
pnode.h
…
posix_acl.c
posix_acl: convert posix_acl.a_refcount from atomic_t to refcount_t
2018-01-02 19:27:28 -08:00
proc_namespace.c
vfs: do bulk POLL* -> EPOLL* replacement
2018-02-11 14:34:03 -08:00
read_write.c
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
readdir.c
fs: add ksys_getdents64() helper; remove in-kernel calls to sys_getdents64()
2018-04-02 20:16:02 +02:00
select.c
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
seq_file.c
proc: fix smaps and meminfo alignment
2018-05-25 18:12:11 -07:00
signalfd.c
Merge branch 'work.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2018-06-16 16:21:50 +09:00
splice.c
Merge branch 'work.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2018-06-16 16:21:50 +09:00
stack.c
…
stat.c
fs: add do_readlinkat() helper; remove internal call to sys_readlinkat()
2018-04-02 20:15:34 +02:00
statfs.c
…
super.c
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2018-06-04 10:14:28 -07:00
sync.c
Changes for this release:
2018-04-04 12:44:02 -07:00
timerfd.c
timerfd: convert to ->poll_mask
2018-05-26 09:16:44 +02:00
userfaultfd.c
userfaultfd: prevent non-cooperative events vs mcopy_atomic races
2018-06-07 17:34:38 -07:00
utimes.c
fs: add do_compat_futimesat() helper; remove in-kernel call to compat syscall
2018-04-02 20:15:44 +02:00
xattr.c
vfs: delete unnecessary assignment in vfs_listxattr
2018-05-29 13:22:41 -04:00