Filipe Manana 3372691721 btrfs: send: use fallocate for hole punching with send stream v2 ... [ Upstream commit 005b0a0c24 ] Currently holes are sent as writes full of zeroes, which results in unnecessarily using disk space at the receiving end and increasing the stream size. In some cases we avoid sending writes of zeroes, like during a full send operation where we just skip writes for holes. But for some cases we fill previous holes with writes of zeroes too, like in this scenario: 1) We have a file with a hole in the range [2M, 3M), we snapshot the subvolume and do a full send. The range [2M, 3M) stays as a hole at the receiver since we skip sending write commands full of zeroes; 2) We punch a hole for the range [3M, 4M) in our file, so that now it has a 2M hole in the range [2M, 4M), and snapshot the subvolume. Now if we do an incremental send, we will send write commands full of zeroes for the range [2M, 4M), removing the hole for [2M, 3M) at the receiver. We could improve cases such as this last one by doing additional comparisons of file extent items (or their absence) between the parent and send snapshots, but that's a lot of code to add plus additional CPU and IO costs. Since the send stream v2 already has a fallocate command and btrfs-progs implements a callback to execute fallocate since the send stream v2 support was added to it, update the kernel to use fallocate for punching holes for V2+ streams. Test coverage is provided by btrfs/284 which is a version of btrfs/007 that exercises send stream v2 instead of v1, using fsstress with random operations and fssum to verify file contents. Link: https://github.com/kdave/btrfs-progs/issues/1001 CC: stable@vger.kernel.org # 6.1+ Reviewed-by: Boris Burkov <boris@bur.io> Signed-off-by: Filipe Manana <fdmanana@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com> [ Replaced get_cur_inode_path() with fs_path_alloc() and get_cur_path() ] Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2025-08-28 16:26:11 +02:00
..
9p	fs/9p: fix uninitialized values during inode evict	2024-11-22 15:37:34 +01:00
adfs
affs	affs: don't write overlarge OFS data block size fields	2025-04-10 14:33:38 +02:00
afs	afs: Fix the server_list to unuse a displaced server rather than putting it	2025-03-07 16:56:43 +01:00
autofs
befs
bfs
btrfs	btrfs: send: use fallocate for hole punching with send stream v2	2025-08-28 16:26:11 +02:00
cachefiles	cachefiles: Fix the incorrect return value in __cachefiles_write()	2025-07-24 08:51:51 +02:00
ceph	ceph: fix possible integer overflow in ceph_zero_objects()	2025-07-06 10:57:56 +02:00
coda
configfs	configfs: Do not override creating attribute file failure in populate_attrs()	2025-06-27 11:07:25 +01:00
cramfs
crypto	fscrypt: Don't use problematic non-inline crypto engines	2025-08-28 16:26:10 +02:00
debugfs	debugfs: fix automount d_fsdata usage	2024-01-20 11:50:04 +01:00
devpts
dlm	dlm: make tcp still work in multi-link env	2025-06-04 14:40:05 +02:00
ecryptfs	fs: Create a generic is_dot_dotdot() utility	2024-10-17 15:21:17 +02:00
efivarfs	efivarfs: Fix error on non-existent file	2024-12-27 13:52:55 +01:00
efs
erofs	erofs: address D-cache aliasing	2025-08-15 12:04:51 +02:00
exfat	exfat: fix the infinite loop in exfat_find_last_cluster()	2025-04-10 14:33:37 +02:00
exportfs	exportfs: use pr_debug for unreachable debug statements	2024-03-06 14:45:15 +00:00
ext2	ext2: Handle fiemap on empty files to prevent EINVAL	2025-08-28 16:25:51 +02:00
ext4	ext4: fix hole length calculation overflow in non-extent inodes	2025-08-28 16:26:06 +02:00
f2fs	f2fs: fix to do sanity check on ino and xnid	2025-08-28 16:26:09 +02:00
fat	fat: fix uninitialized variable	2024-10-22 15:56:43 +02:00
freevxfs
fscache	netfs/fscache: Add a memory barrier for FSCACHE_VOLUME_CREATING	2024-12-14 19:53:15 +01:00
fuse	fuse: Return EPERM rather than ENOSYS from link()	2025-06-04 14:40:02 +02:00
gfs2	gfs2: move msleep to sleepable context	2025-06-27 11:07:25 +01:00
hfs	hfs: fix not erasing deleted b-tree node issue	2025-08-28 16:25:51 +02:00
hfsplus	hfsplus: don't use BUG_ON() in hfsplus_create_attributes_file()	2025-08-28 16:25:51 +02:00
hostfs
hpfs
hugetlbfs	mm/hugetlb: add hugetlb_folio_subpool() helpers	2024-05-17 11:55:51 +02:00
iomap	iomap: avoid avoid truncating 64-bit offset to 32 bits	2025-01-23 17:17:12 +01:00
isofs	isofs: Verify inode mode when loading from disk	2025-07-24 08:51:49 +02:00
jbd2	jbd2: prevent softlockup in jbd2_log_do_checkpoint()	2025-08-28 16:26:07 +02:00
jffs2	jffs2: check jffs2_prealloc_raw_node_refs() result in few other places	2025-06-27 11:07:36 +01:00
jfs	jfs: upper bound check of tree index in dbAllocAG	2025-08-28 16:26:00 +02:00
kernfs	kernfs: Relax constraint in draining guard	2025-06-27 11:07:11 +01:00
lockd	nfsd: stop setting ->pg_stats for unused stats	2024-08-19 06:00:04 +02:00
minix
netfs
nfs	pNFS: Fix uninited ptr deref in block/scsi layout	2025-08-28 16:26:03 +02:00
nfs_common
nfsd	NFSD: detect mismatch of file handle and delegation stateid in OPEN op	2025-08-28 16:25:48 +02:00
nilfs2	nilfs2: reject invalid file types when reading inodes	2025-08-15 12:04:49 +02:00
nls
notify	fsnotify: fix sending inotify event with unexpected filename	2024-12-14 19:53:59 +01:00
ntfs
ntfs3	fs/ntfs3: correctly create symlink for relative path	2025-08-28 16:25:51 +02:00
ocfs2	ocfs2: fix possible memory leak in ocfs2_finish_quota_recovery	2025-06-27 11:07:13 +01:00
omfs	fs: omfs: Use flexible-array member in struct omfs_extent	2025-07-06 10:58:03 +02:00
openpromfs	openpromfs: finish conversion to the new mount API	2024-06-12 11:03:03 +02:00
orangefs	fs/orangefs: use snprintf() instead of sprintf()	2025-08-28 16:25:59 +02:00
overlayfs	ovl: Check for NULL d_inode() in ovl_dentry_upper()	2025-07-06 10:57:56 +02:00
proc	proc: use the same treatment to check proc_lseek as ones for proc_read_iter et.al	2025-08-15 12:05:03 +02:00
pstore	pstore/blk: trivial typo fixes	2025-02-21 13:48:53 +01:00
qnx4
qnx6
quota	quota: flush quota_release_work upon quota writeback	2024-12-14 19:54:10 +01:00
ramfs
reiserfs	reiserfs: fix uninit-value in comp_keys	2024-08-29 17:30:20 +02:00
romfs
smb	cifs: reset iface weights when we cannot find a candidate	2025-08-28 16:26:10 +02:00
squashfs	Squashfs: check return result of sb_min_blocksize	2025-06-27 11:07:13 +01:00
sysfs	fs: sysfs: Fix reference leak in sysfs_break_active_protection()	2024-04-27 17:07:16 +02:00
sysv	sysv: don't call sb_bread() with pointers_lock held	2024-04-13 13:05:05 +02:00
tracefs
ubifs	ubifs: skip dumping tnc tree when zroot is null	2025-02-21 13:49:21 +01:00
udf	udf: Verify partition map count	2025-08-28 16:25:51 +02:00
ufs
unicode	Revert "unicode: Don't special case ignorable code points"	2024-12-14 19:54:50 +01:00
vboxsf	vboxsf: fix building with GCC 15	2025-03-28 21:58:51 +01:00
verity
xfs	xfs: fully decouple XFS_IBULK* flags from XFS_IWALK* flags	2025-08-28 16:26:11 +02:00
zonefs	zonefs: Improve error handling	2024-02-23 09:12:45 +01:00
aio.c	fs/aio: Check IOCB_AIO_RW before the struct aio_kiocb conversion	2024-04-03 15:19:42 +02:00
anon_inodes.c	fs: export anon_inode_make_secure_inode() and fix secretmem LSM bypass	2025-07-17 18:32:10 +02:00
attr.c
bad_inode.c
binfmt_elf_fdpic.c	binfmt: Fix whitespace issues	2025-05-22 14:09:58 +02:00
binfmt_elf_test.c
binfmt_elf.c	binfmt_elf: Move brk for static PIE even if ASLR disabled	2025-05-22 14:09:59 +02:00
binfmt_flat.c	binfmt_flat: Fix integer overflow bug on 32 bit systems	2025-02-21 13:49:39 +01:00
binfmt_misc.c	binfmt_misc: cleanup on filesystem umount	2024-08-29 17:30:30 +02:00
binfmt_script.c
buffer.c
char_dev.c
compat_binfmt_elf.c
coredump.c	coredump: hand a pidfd to the usermode coredump helper	2025-06-04 14:40:25 +02:00
d_path.c
dax.c	fsdax: dax_unshare_iter needs to copy entire blocks	2024-11-08 16:26:42 +01:00
dcache.c	fs: better handle deep ancestor chains in is_subdir()	2024-07-25 09:49:18 +02:00
direct-io.c
drop_caches.c
eventfd.c
eventpoll.c	eventpoll: Fix semi-unbounded recursion	2025-08-28 16:25:49 +02:00
exec.c	binfmt: Fix whitespace issues	2025-05-22 14:09:58 +02:00
fcntl.c	fs: Fix file_set_fowner LSM hook inconsistencies	2024-10-17 15:21:23 +02:00
fhandle.c	do_sys_name_to_handle(): use kzalloc() to fix kernel-infoleak	2024-03-26 18:20:27 -04:00
file_table.c	fs: fix proc_handler for sysctl_nr_open	2025-02-21 13:48:53 +01:00
file.c	fs: Prevent file descriptor table allocations exceeding INT_MAX	2025-08-28 16:25:49 +02:00
filesystems.c	fs/filesystems: Fix potential unsigned integer underflow in fs_name()	2025-06-27 11:07:23 +01:00
fs_context.c
fs_parser.c
fs_pin.c
fs_struct.c
fs_types.c
fs-writeback.c
fsopen.c
init.c
inode.c	fs/inode: Prevent dump_mapping() accessing invalid dentry.d_name.name	2024-12-14 19:53:13 +01:00
internal.h
ioctl.c	lsm: new security_file_ioctl_compat() hook	2024-01-31 16:17:00 -08:00
Kconfig	nfs: add missing selections of CONFIG_CRC32	2025-04-25 10:43:52 +02:00
Kconfig.binfmt
kernel_read_file.c
libfs.c	better lockdep annotations for simple_recursive_removal()	2025-08-28 16:25:51 +02:00
locks.c	filelock: Fix fcntl/close race recovery compat path	2024-07-27 11:32:19 +02:00
Makefile
mbcache.c
mount.h
mpage.c
namei.c	fuse: don't truncate cached, mutated symlink	2025-03-28 21:58:53 +01:00
namespace.c	clone_private_mnt(): make sure that caller has CAP_SYS_ADMIN in the right userns	2025-07-24 08:51:54 +02:00
no-block.c
nsfs.c
open.c	openat2: explicitly return -E2BIG for (usize > PAGE_SIZE)	2024-11-01 01:56:06 +01:00
pipe.c	fs/pipe: Fix lockdep false-positive in watchqueue pipe_write()	2024-04-10 16:28:30 +02:00
pnode.c
pnode.h
posix_acl.c
proc_namespace.c
read_write.c
readdir.c
remap_range.c
select.c	hrtimer: Use and report correct timerslack values for realtime tasks	2025-03-28 21:58:48 +01:00
seq_file.c
signalfd.c
splice.c	mm: merge folio_has_private()/filemap_release_folio() call pairs	2024-01-10 17:10:31 +01:00
stack.c
stat.c
statfs.c
super.c	fs: don't allow non-init s_user_ns for filesystems without FS_USERNS_MOUNT	2024-08-03 08:49:53 +02:00
sync.c
sysctls.c
timerfd.c
userfaultfd.c	mm/uffd: fix vma operation where start addr cuts part of vma	2025-06-27 11:07:04 +01:00
utimes.c
xattr.c