Prasad Singamsetty c34fc6f26a fs: Initial atomic write support ... An atomic write is a write issued with torn-write protection, meaning that for a power failure or any other hardware failure, all or none of the data from the write will be stored, but never a mix of old and new data. Userspace may add flag RWF_ATOMIC to pwritev2() to indicate that the write is to be issued with torn-write prevention, according to special alignment and length rules. For any syscall interface utilizing struct iocb, add IOCB_ATOMIC for iocb->ki_flags field to indicate the same. A call to statx will give the relevant atomic write info for a file: - atomic_write_unit_min - atomic_write_unit_max - atomic_write_segments_max Both min and max values must be a power-of-2. Applications can avail of atomic write feature by ensuring that the total length of a write is a power-of-2 in size and also sized between atomic_write_unit_min and atomic_write_unit_max, inclusive. Applications must ensure that the write is at a naturally-aligned offset in the file wrt the total write length. The value in atomic_write_segments_max indicates the upper limit for IOV_ITER iovcnt. Add file mode flag FMODE_CAN_ATOMIC_WRITE, so files which do not have the flag set will have RWF_ATOMIC rejected and not just ignored. Add a type argument to kiocb_set_rw_flags() to allows reads which have RWF_ATOMIC set to be rejected. Helper function generic_atomic_write_valid() can be used by FSes to verify compliant writes. There we check for iov_iter type is for ubuf, which implies iovcnt==1 for pwritev2(), which is an initial restriction for atomic_write_segments_max. Initially the only user will be bdev file operations write handler. We will rely on the block BIO submission path to ensure write sizes are compliant for the bdev, so we don't need to check atomic writes sizes yet. Signed-off-by: Prasad Singamsetty <prasad.singamsetty@oracle.com> jpg: merge into single patch and much rewrite Acked-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: John Garry <john.g.garry@oracle.com> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Link: https://lore.kernel.org/r/20240620125359.2684798-4-john.g.garry@oracle.com Signed-off-by: Jens Axboe <axboe@kernel.dk>		2024-06-20 15:19:17 -06:00
..
9p	Two fixes headed to stable trees:	2024-05-29 09:25:15 -07:00
adfs	mm, slab: remove last vestiges of SLAB_MEM_SPREAD	2024-03-12 20:32:19 -07:00
affs	affs: remove SLAB_MEM_SPREAD flag usage	2024-02-26 11:36:28 +01:00
afs	netfs, 9p: Fix race between umount and async request completion	2024-05-27 13:12:13 +02:00
autofs	dcache stuff for this cycle	2024-01-11 20:11:35 -08:00
bcachefs	bcachefs: Fix trans->locked assert	2024-06-05 10:44:08 -04:00
befs	mm, slab: remove last vestiges of SLAB_MEM_SPREAD	2024-03-12 20:32:19 -07:00
bfs	mm, slab: remove last vestiges of SLAB_MEM_SPREAD	2024-03-12 20:32:19 -07:00
btrfs	fs: Initial atomic write support	2024-06-20 15:19:17 -06:00
cachefiles	Assorted commits that had missed the last merge window...	2024-05-21 13:11:44 -07:00
ceph	We have a series from Xiubo that adds support for additional access	2024-05-25 14:23:58 -07:00
coda	mm, slab: remove last vestiges of SLAB_MEM_SPREAD	2024-03-12 20:32:19 -07:00
configfs
cramfs	use ->bd_mapping instead of ->bd_inode->i_mapping	2024-05-03 02:36:51 -04:00
crypto	The usual shower of singleton fixes and minor series all over MM,	2024-05-19 09:21:03 -07:00
debugfs	vfs: Convert debugfs to use the new mount API	2024-03-26 09:04:54 +01:00
devpts	fs: Remove the now superfluous sentinel elements from ctl_table array	2023-12-28 04:57:57 -08:00
dlm	dlm: return -ENOMEM if ls_recover_buf fails	2024-04-23 16:08:55 -05:00
ecryptfs	hardening updates for 6.10-rc1	2024-05-13 14:14:05 -07:00
efivarfs	efi: Clear up misconceptions about a maximum variable name size	2024-04-13 10:33:02 +02:00
efs	efs: remove SLAB_MEM_SPREAD flag usage	2024-02-27 11:21:33 +01:00
erofs	Changes since last update:	2024-05-24 09:31:50 -07:00
exfat	exfat: zero the reserved fields of file and stream extension dentries	2024-04-25 21:59:59 +09:00
exportfs	fs: Create a generic is_dot_dotdot() utility	2024-01-23 10:58:56 -05:00
ext2	ext2: Remove LEGACY_DIRECT_IO dependency	2024-05-03 11:50:28 +02:00
ext4	bd_inode series	2024-05-21 09:51:42 -07:00
f2fs	f2fs update for 6.10-rc1	2024-05-20 13:23:43 -07:00
fat	fs: add kernel-doc comments to fat_parse_long()	2024-04-25 21:07:02 -07:00
freevxfs	freevxfs: Convert freevxfs to the new mount API.	2024-03-26 09:04:53 +01:00
fuse	virtio: features, fixes, cleanups	2024-05-23 12:04:36 -07:00
gfs2	bd_inode series	2024-05-21 09:51:42 -07:00
hfs	hfs: really remove hfs_writepage	2023-12-29 11:58:34 -08:00
hfsplus	hfsplus: refactor copy_name to not use strncpy	2024-04-24 16:55:28 -07:00
hostfs	hostfs: use d_splice_alias() calling conventions to simplify failure exits	2023-12-21 12:51:00 -05:00
hpfs	mm, slab: remove last vestiges of SLAB_MEM_SPREAD	2024-03-12 20:32:19 -07:00
hugetlbfs	The usual shower of singleton fixes and minor series all over MM,	2024-05-19 09:21:03 -07:00
iomap	iomap: fault in smaller chunks for non-large folio mappings	2024-05-24 13:34:07 +02:00
isofs	isofs: Use *-y instead of *-objs in Makefile	2024-05-09 18:09:57 +02:00
jbd2	bd_inode series	2024-05-21 09:51:42 -07:00
jffs2	This pull request contains the following changes for JFFS2:	2024-05-25 13:23:42 -07:00
jfs	fs,block: yield devices early	2024-03-27 13:17:15 +01:00
kernfs	kernfs: mount: Remove unnecessary ‘NULL’ values from knparent	2024-05-04 19:02:39 +02:00
lockd	lockd: host: Remove unnecessary statements＇host = NULL;＇	2024-05-06 09:07:20 -04:00
minix	minix: convert minix to use the new mount api	2024-03-26 09:04:55 +01:00
netfs	vfs-6.10-rc2.fixes	2024-05-27 08:09:12 -07:00
nfs	NFS client updates for Linux 6.10	2024-05-23 13:51:09 -07:00
nfs_common
nfsd	tracing/treewide: Remove second parameter of __assign_str()	2024-05-22 20:14:47 -04:00
nilfs2	nilfs2: fix nilfs_empty_dir() misjudgment and long loop on I/O errors	2024-06-05 19:19:27 -07:00
nls
notify	Revert "fanotify: remove unneeded sub-zero check for unsigned value"	2024-05-20 12:43:58 -07:00
ntfs3	driver ntfs3 for linux 6.10	2024-05-25 14:19:01 -07:00
ocfs2	tracing/treewide: Remove second parameter of __assign_str()	2024-05-22 20:14:47 -04:00
omfs
openpromfs	openpromfs: finish conversion to the new mount API	2024-03-26 09:04:54 +01:00
orangefs	orangefs: fix out-of-bounds fsid access	2024-05-14 17:44:14 -07:00
overlayfs	overlayfs update for 6.10	2024-05-22 09:23:18 -07:00
proc	mm/ksm: fix ksm_zero_pages accounting	2024-06-05 19:19:26 -07:00
pstore	pstore/zone: Don't clear memory twice	2024-03-09 12:33:22 -08:00
qnx4	mm, slab: remove last vestiges of SLAB_MEM_SPREAD	2024-03-12 20:32:19 -07:00
qnx6	qnx6: convert qnx6 to use the new mount api	2024-03-26 09:04:53 +01:00
quota	quota: fix to propagate error of mark_dquot_dirty() to caller	2024-04-12 14:52:29 +02:00
ramfs	mm: switch mm->get_unmapped_area() to a flag	2024-04-25 20:56:25 -07:00
reiserfs	getting rid of bogus set_blocksize() uses, switching it	2024-05-21 08:34:51 -07:00
romfs	fs,block: yield devices early	2024-03-27 13:17:15 +01:00
smb	cifs: Don't advance the I/O iterator before terminating subrequest	2024-06-07 01:05:26 -05:00
squashfs	Mainly singleton patches, documented in their respective changelogs.	2024-05-19 14:02:03 -07:00
sysfs	Merge 6.9-rc5 into driver-core-next	2024-04-23 13:27:43 +02:00
sysv	sysv: remove SLAB_MEM_SPREAD flag usage	2024-02-27 11:21:31 +01:00
tracefs	eventfs: Do not use attributes for events directory	2024-05-23 09:31:50 -04:00
ubifs	This pull request contains updates for UBI and UBIFS:	2024-03-21 15:09:29 -07:00
udf	udf: Use a folio in udf_write_end()	2024-04-23 15:37:02 +02:00
ufs	mm, slab: remove last vestiges of SLAB_MEM_SPREAD	2024-03-12 20:32:19 -07:00
unicode	kbuild: use $(src) instead of $(srctree)/$(src) for source directory	2024-05-10 04:34:52 +09:00
vboxsf	vboxsf: explicitly deny setlease attempts	2024-04-03 16:06:39 +02:00
verity	fsverity: use register_sysctl_init() to avoid kmemleak warning	2024-05-03 08:30:58 -07:00
xfs	xfs: Add cond_resched to block unmap range and reflink remap path	2024-05-27 20:50:35 +05:30
zonefs	zonefs: Use str_plural() to fix Coccinelle warning	2024-04-10 07:23:47 +09:00
aio.c	fs: Initial atomic write support	2024-06-20 15:19:17 -06:00
anon_inodes.c	fs: Create anon_inode_getfile_fmode()	2024-04-26 10:33:05 +02:00
attr.c	lsm/stable-6.9 PR 20240312	2024-03-12 20:03:34 -07:00
backing-file.c	ovl: implement tmpfile	2024-05-02 20:35:57 +02:00
bad_inode.c
binfmt_elf_fdpic.c	binfmt_elf_fdpic: fix /proc/<pid>/auxv	2024-04-24 15:55:28 -07:00
binfmt_elf_test.c
binfmt_elf.c	Mainly singleton patches, documented in their respective changelogs.	2024-05-19 14:02:03 -07:00
binfmt_flat.c
binfmt_misc.c
binfmt_script.c
buffer.c	bd_inode series	2024-05-21 09:51:42 -07:00
char_dev.c
compat_binfmt_elf.c
coredump.c	virtio: features, fixes, cleanups	2024-05-23 12:04:36 -07:00
d_path.c
dax.c	dax: use huge_zero_folio	2024-04-25 20:56:20 -07:00
dcache.c	Revert "vfs: Delete the associated dentry when deleting a file"	2024-05-29 09:39:34 -07:00
direct-io.c	fs/direct-io: remove redundant assignment to variable retval	2024-04-11 10:21:24 +02:00
drop_caches.c
eventfd.c	eventfd: strictly check the count parameter of eventfd_write to avoid inputting illegal strings	2024-02-08 10:12:26 +01:00
eventpoll.c	epoll: be better about file lifetimes	2024-05-05 14:00:48 -07:00
exec.c	The usual shower of singleton fixes and minor series all over MM,	2024-05-19 09:21:03 -07:00
fcntl.c	fcntl: add F_DUPFD_QUERY fcntl()	2024-05-10 08:26:31 +02:00
fhandle.c	fs: Annotate struct file_handle with __counted_by() and use struct_size()	2024-04-05 15:53:47 +02:00
file_table.c	lsm/stable-6.9 PR 20240312	2024-03-12 20:03:34 -07:00
file.c	get_file_rcu(): no need to check for NULL separately	2024-04-15 16:03:24 -04:00
filesystems.c
fs_context.c
fs_parser.c	__fs_parse: Correct a documentation comment	2024-02-02 13:11:50 +01:00
fs_pin.c
fs_struct.c
fs_types.c
fs-writeback.c	fs/writeback: remove unnecessary return in writeback_inodes_sb	2024-04-05 15:53:45 +02:00
fsopen.c
init.c
inode.c	bcachefs updates for 6.9	2024-03-15 09:00:09 -07:00
internal.h	ovl: implement tmpfile	2024-05-02 20:35:57 +02:00
ioctl.c	fs/ioctl: Add a comment to keep the logic in sync with LSM policies	2024-05-13 06:58:35 +02:00
Kconfig	- Sumanth Korikkar has taught s390 to allocate hotplug-time page frames	2024-03-14 17:43:30 -07:00
Kconfig.binfmt
kernel_read_file.c
libfs.c	shmem: Fix shmem_rename2()	2024-04-17 13:49:44 +02:00
locks.c	filelock: fix deadlock detection in POSIX locking	2024-02-20 09:53:33 +01:00
Makefile	vfs-6.9.pidfd	2024-03-11 10:21:06 -07:00
mbcache.c	vfs: remove SLAB_MEM_SPREAD flag usage	2024-02-27 11:21:31 +01:00
mnt_idmapping.c	fs/mnt_idmapping.c: Return -EINVAL when no map is written	2024-02-08 10:12:37 +01:00
mount.h
mpage.c	block, fs: Restore the per-bio/request data lifetime fields	2024-02-06 14:31:05 +01:00
namei.c	overlayfs update for 6.10	2024-05-22 09:23:18 -07:00
namespace.c	fs: relax mount_setattr() permission checks	2024-02-07 21:16:29 +01:00
nsfs.c	pidfs: remove config option	2024-03-13 12:53:53 -07:00
open.c	do_dentry_open(): kill inode argument	2024-04-15 16:03:25 -04:00
pidfs.c	fs/pidfs: make 'lsof' happy with our inode changes	2024-05-21 08:08:00 -07:00
pipe.c	fs/pipe: Convert to lockdep_cmp_fn	2024-02-02 13:11:49 +01:00
pnode.c
pnode.h
posix_acl.c	lsm/stable-6.9 PR 20240312	2024-03-12 20:03:34 -07:00
proc_namespace.c
read_write.c	fs: Initial atomic write support	2024-06-20 15:19:17 -06:00
readdir.c	fsnotify: optionally pass access range in file permission hooks	2023-12-12 16:20:02 +01:00
remap_range.c	vfs: export remap and write check helpers	2024-04-15 14:54:13 -07:00
select.c	fs/select: rework stack allocation hack for clang	2024-02-20 09:23:52 +01:00
seq_file.c	seq_file: Simplify __seq_puts()	2024-05-02 16:28:20 +02:00
signalfd.c	signalfd: drop an obsolete comment	2024-05-24 13:34:07 +02:00
splice.c	remove call_{read,write}_iter() functions	2024-04-15 16:03:25 -04:00
stack.c
stat.c	statx: stx_subvol	2024-03-26 09:01:18 +01:00
statfs.c
super.c	\n	2024-05-20 12:31:43 -07:00
sync.c
sysctls.c	fs: Remove the now superfluous sentinel elements from ctl_table array	2023-12-28 04:57:57 -08:00
timerfd.c	timerfd: convert to ->read_iter()	2024-04-10 16:23:02 -06:00
userfaultfd.c	The usual shower of singleton fixes and minor series all over MM,	2024-05-19 09:21:03 -07:00
utimes.c
xattr.c	evm: Move to LSM infrastructure	2024-02-15 23:43:47 -05:00