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Piotr Sarna 1ab5b82f54 hugetlbfs: add O_TMPFILE support 
With hugetlbfs, a common pattern for mapping anonymous huge pages is to
create a temporary file first.  Currently libraries like libhugetlbfs
and seastar create these with a standard mkstemp+unlink trick, but it
would be more robust to be able to simply pass the O_TMPFILE flag to
open().  O_TMPFILE is already supported by several file systems like
ext4 and xfs.  The implementation simply uses the existi= ng d_tmpfile
utility function to instantiate the dcache entry for the file.

Tested manually by successfully creating a temporary file by opening it
with (O_TMPFILE|O_RDWR) on mounted hugetlbfs and successfully mapping 2M
huge pages with it.  Without the patch, trying to open a file with
O_TMPFILE results in -ENOSUP.

Link: http://lkml.kernel.org/r/bc9383eff6e1374d79f3a92257ae829ba1e6ae60.1573285189.git.p.sarna@tlen.pl
Signed-off-by: Piotr Sarna <p.sarna@tlen.pl>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Michal Hocko <mhocko@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-12-01 12:59:08 -08:00
..
9p
9p pull request for inclusion in 5.4
2019-09-27 15:10:34 -07:00
adfs
Merge branch 'work.adfs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 11:33:22 -07:00
affs
affs: fix a memory leak in affs_remount
2019-11-18 14:26:43 +01:00
afs
AFS development
2019-11-30 10:57:22 -08:00
autofs
autofs: fix a leak in autofs_expire_indirect()
2019-10-25 00:03:11 -04:00
befs
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
bfs
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
btrfs
btrfs: drop bdev argument from submit_extent_page
2019-11-18 23:43:58 +01:00
cachefiles
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36
2019-05-24 17:27:11 +02:00
ceph
ceph: increment/decrement dio counter on async requests
2019-11-14 18:44:51 +01:00
cifs
CIFS: fix a white space issue in cifs_get_inode_info()
2019-11-27 11:31:49 -06:00
coda
y2038: add inode timestamp clamping
2019-09-19 09:42:37 -07:00
configfs
configfs: calculate the depth of parent item
2019-11-06 18:36:01 +01:00
cramfs
cramfs: fix usage on non-MTD device
2019-11-23 21:44:49 -05:00
crypto
fscrypt: add support for IV_INO_LBLK_64 policies
2019-11-06 12:34:36 -08:00
debugfs
debugfs: remove return value of debugfs_create_atomic_t()
2019-11-03 14:03:01 +01:00
devpts
devpts_pty_kill(): don't bother with d_delete()
2019-09-03 09:30:56 -04:00
dlm
dlm for 5.3
2019-07-12 17:37:53 -07:00
ecryptfs
ecryptfs_lookup_interpose(): lower_dentry->d_parent is not stable either
2019-11-10 11:57:45 -05:00
efivarfs
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
efs
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
erofs
erofs: remove unnecessary output in erofs_show_options()
2019-11-24 11:02:41 +08:00
exportfs
exportfs_decode_fh(): negative pinned may become positive without the parent locked
2019-11-10 11:56:05 -05:00
ext2
\n
2019-11-30 11:16:07 -08:00
ext4
\n
2019-11-30 11:16:07 -08:00
f2fs
\n
2019-11-30 11:16:07 -08:00
fat
fat: delete an unnecessary check before brelse()
2019-09-25 17:51:40 -07:00
freevxfs
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
fscache
Revert "Merge tag 'keys-acl-20190703' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs"
2019-07-10 18:43:43 -07:00
fuse
fuse: redundant get_fuse_inode() calls in fuse_writepages_fill()
2019-10-23 14:26:37 +02:00
gfs2
New code for 5.5:
2019-11-30 10:44:49 -08:00
hfs
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
hfsplus
fs/hfsplus/xattr.c: replace strncpy with memcpy
2019-07-16 19:23:23 -07:00
hostfs
This pull request contains the following changes for UML:
2019-05-12 17:52:13 -04:00
hpfs
fs: hpfs: Initialize filesystem timestamp ranges
2019-08-30 08:11:25 -07:00
hugetlbfs
hugetlbfs: add O_TMPFILE support
2019-12-01 12:59:08 -08:00
iomap
iomap: Fix pipe page leakage during splicing
2019-11-22 08:36:02 -08:00
isofs
y2038: add inode timestamp clamping
2019-09-19 09:42:37 -07:00
jbd2
This merge window saw the the following new featuers added to ext4:
2019-11-30 10:53:02 -08:00
jffs2
Merge branch 'work.mount3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-09-26 11:33:30 -07:00
jfs
y2038: add inode timestamp clamping
2019-09-19 09:42:37 -07:00
kernfs
Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2019-11-26 16:02:40 -08:00
lockd
lockd: Make two symbols static
2019-07-03 17:52:09 -04:00
minix
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
nfs
NFS: Fix an RCU lock leak in nfs4_refresh_delegation_stateid()
2019-11-01 11:03:56 -04:00
nfs_common
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
nfsd
Highlights:
2019-09-27 17:00:27 -07:00
nilfs2
vfs: create a generic checking and prep function for FS_IOC_SETFLAGS
2019-07-01 08:25:34 -07:00
nls
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
notify
fsnotify/fdinfo: exportfs_encode_inode_fh() takes pointer as 4th argument
2019-10-17 10:32:59 +02:00
ntfs
ntfs: remove (un)?likely() from IS_ERR() conditions
2019-09-26 10:10:44 -07:00
ocfs2
ocfs2: fix passing zero to 'PTR_ERR' warning
2019-12-01 06:29:17 -08:00
omfs
fs: omfs: Initialize filesystem timestamp ranges
2019-08-30 08:11:25 -07:00
openpromfs
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
orangefs
Orangefs: a fix and a cleanup
2019-09-19 10:21:35 -07:00
overlayfs
ovl: filter of trusted xattr results in audit
2019-09-11 16:11:45 +02:00
proc
procfs: Use all-in-one vtime aware kcpustat accessor
2019-11-21 07:33:24 +01:00
pstore
pstore: fs superblock limits
2019-08-30 08:11:25 -07:00
qnx4
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
qnx6
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
quota
fs/quota: handle overflows of sysctl fs.quota.* and report as unsigned long
2019-11-11 11:06:27 +01:00
ramfs
vfs: Convert ramfs, shmem, tmpfs, devtmpfs, rootfs to use the new mount API
2019-09-12 21:05:34 -04:00
reiserfs
reiserfs: replace open-coded atomic_dec_and_mutex_lock()
2019-11-05 12:25:22 +01:00
romfs
Merge branch 'work.mount2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-09-19 10:06:57 -07:00
squashfs
Merge branch 'work.mount2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-09-19 10:06:57 -07:00
sysfs
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
sysv
fs: sysv: Initialize filesystem timestamp ranges
2019-08-30 07:27:18 -07:00
tracefs
tracing: Do not create tracefs files if tracefs lockdown is in effect
2019-10-12 20:49:07 -04:00
ubifs
This pull request contains the following changes for UBI, UBIFS and JFFS2:
2019-09-21 11:10:16 -07:00
udf
fs-udf: Delete an unnecessary check before brelse()
2019-09-04 18:19:43 +02:00
ufs
y2038: add inode timestamp clamping
2019-09-19 09:42:37 -07:00
unicode
unicode: make array 'token' static const, makes object smaller
2019-09-17 11:48:24 -04:00
verity
fs-verity: support builtin file signatures
2019-08-12 19:33:50 -07:00
xfs
New code for 5.5:
2019-11-30 10:44:49 -08:00
aio.c
aio: Fix io_pgetevents() struct __compat_aio_sigset layout
2019-10-21 19:12:19 -04:00
anon_inodes.c
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
attr.c
timestamp_truncate: Replace users of timespec64_trunc
2019-08-30 07:27:17 -07:00
bad_inode.c
…
binfmt_aout.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
binfmt_elf_fdpic.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
binfmt_elf.c
elf: don't use MAP_FIXED_NOREPLACE for elf executable mappings
2019-10-06 13:53:27 -07:00
binfmt_em86.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
binfmt_flat.c
fs/binfmt_flat.c: remove set but not used variable 'inode'
2019-07-16 19:23:22 -07:00
binfmt_misc.c
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
binfmt_script.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
block_dev.c
block: move clearing bd_invalidated into check_disk_size_change
2019-11-14 07:44:01 -07:00
buffer.c
fs/buffer.c: include internal.h for missing declarations
2019-12-01 06:29:17 -08:00
char_dev.c
chardev: set variable ret to -EBUSY before checking minor range overlap
2019-05-24 20:50:36 +02:00
compat_binfmt_elf.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 193
2019-05-30 11:29:21 -07:00
compat_ioctl.c
compat_ioctl: pppoe: fix PPPOEIOCSFWD handling
2019-07-30 14:42:13 -07:00
compat.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
coredump.c
coredump: split pipe command whitespace before expanding template
2019-08-03 07:02:01 -07:00
d_path.c
[PATCH] fix d_absolute_path() interplay with fsmount()
2019-08-30 19:31:09 -04:00
dax.c
New code for 5.5:
2019-11-30 10:44:49 -08:00
dcache.c
locking/lockdep: Remove unused @nested argument from lock_release()
2019-10-09 12:46:10 +02:00
dcookies.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
direct-io.c
fs/direct-io.c: keep dio_warn_stale_pagecache() when CONFIG_BLOCK=n
2019-12-01 06:29:18 -08:00
drop_caches.c
fs/drop_caches.c: avoid softlockups in drop_pagecache_sb()
2019-02-01 15:46:24 -08:00
eventfd.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
eventpoll.c
PM / wakeup: Show wakeup sources stats in sysfs
2019-08-21 00:20:40 +02:00
exec.c
exit/exec: Seperate mm_release()
2019-11-20 09:40:08 +01:00
fcntl.c
fcntl: fix typo in RWH_WRITE_LIFE_NOT_SET r/w hint name
2019-10-25 14:28:10 -06:00
fhandle.c
fs/handle.c - fix up kerneldoc
2019-08-07 21:51:47 -04:00
file_table.c
vfs: Export flush_delayed_fput for use by knfsd.
2019-08-19 11:00:39 -04:00
file.c
Revert "vfs: properly and reliably lock f_pos in fdget_pos()"
2019-11-26 11:34:06 -08:00
filesystems.c
vfs: Implement a filesystem superblock creation/configuration context
2019-02-28 03:29:26 -05:00
fs_context.c
vfs: subtype handling moved to fuse
2019-09-06 21:28:49 +02:00
fs_parser.c
vfs: Make fs_parse() handle fs_param_is_fd-type params better
2019-09-12 21:06:14 -04:00
fs_pin.c
switch the remnants of releasing the mountpoint away from fs_pin
2019-07-16 22:52:37 -04:00
fs_struct.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
fs_types.c
fs: common implementation of file type
2019-01-21 17:48:13 +01:00
fs-writeback.c
cgroup,writeback: don't switch wbs immediately on dead wbs if the memcg is dead
2019-11-08 13:37:24 -07:00
fsopen.c
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
inode.c
mm,thp: avoid writes to file with THP in pagecache
2019-09-24 15:54:11 -07:00
internal.h
Merge branch 'work.dcache2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-20 09:15:51 -07:00
io_uring.c
io_uring: make poll->wait dynamically allocated
2019-11-26 15:02:56 -07:00
io-wq.c
io-wq: shrink io_wq_work a bit
2019-11-26 15:02:56 -07:00
io-wq.h
io-wq: shrink io_wq_work a bit
2019-11-26 15:02:56 -07:00
ioctl.c
Remove 'type' argument from access_ok() function
2019-01-03 18:57:57 -08:00
Kconfig
io-wq: small threadpool implementation for io_uring
2019-10-29 12:43:00 -06:00
Kconfig.binfmt
binfmt_flat: make support for old format binaries optional
2019-06-24 09:16:47 +10:00
libfs.c
fs/libfs.c: fix kernel-doc warning
2019-10-14 15:04:01 -07:00
locks.c
Highlights:
2019-09-27 17:00:27 -07:00
Makefile
io-wq: small threadpool implementation for io_uring
2019-10-29 12:43:00 -06:00
mbcache.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
mount.h
switch the remnants of releasing the mountpoint away from fs_pin
2019-07-16 22:52:37 -04:00
mpage.c
blkcg, writeback: Rename wbc_account_io() to wbc_account_cgroup_owner()
2019-07-10 09:00:57 -06:00
namei.c
fs/namei.c: keep track of nd->root refcount status
2019-09-03 09:30:45 -04:00
namespace.c
fs/namespace.c: fix use-after-free of mount in mnt_warn_timestamp_expiry()
2019-10-16 23:15:09 -04:00
no-block.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
nsfs.c
vfs: Convert nsfs to use the new mount API
2019-05-25 18:00:06 -04:00
open.c
Revert "vfs: properly and reliably lock f_pos in fdget_pos()"
2019-11-26 11:34:06 -08:00
pipe.c
vfs: mark pipes and sockets as stream-like file descriptors
2019-11-25 09:12:11 -08:00
pnode.c
fs/namespace: fix unprivileged mount propagation
2019-06-17 17:36:09 -04:00
pnode.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 209
2019-05-30 11:29:53 -07:00
posix_acl.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
proc_namespace.c
vfs: subtype handling moved to fuse
2019-09-06 21:28:49 +02:00
read_write.c
vfs: fix page locking deadlocks when deduping files
2019-08-16 18:43:24 -07:00
readdir.c
filldir[64]: remove WARN_ON_ONCE() for bad directory entries
2019-10-18 18:41:16 -04:00
select.c
fs/select.c: use struct_size() in kmalloc()
2019-07-16 19:23:25 -07:00
seq_file.c
seq_file: fix problem when seeking mid-record
2019-08-13 16:06:52 -07:00
signalfd.c
fs: mark expected switch fall-throughs
2019-04-08 18:21:02 -05:00
splice.c
splice: only read in as much information as there is pipe buffer space
2019-10-15 08:44:32 -07:00
stack.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
stat.c
fs: move generic stat response attr handling to vfs_getattr_nosec
2019-02-01 01:55:45 -05:00
statfs.c
vfs: Fix EOVERFLOW testing in put_compat_statfs64
2019-10-03 14:21:35 -07:00
super.c
Merge branch 'work.mount3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-10-10 08:16:44 -07:00
sync.c
fs/sync.c: sync_file_range(2) may use WB_SYNC_ALL writeback
2019-05-14 09:47:50 -07:00
timerfd.c
timerfd: Prepare for PREEMPT_RT
2019-08-01 20:51:23 +02:00
userfaultfd.c
userfaultfd: untag user pointers
2019-09-25 17:51:41 -07:00
utimes.c
utimes: Clamp the timestamps before update
2019-08-30 07:27:17 -07:00
xattr.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00