Martin Michaelis 7deba791ad io_uring/kbuf: support min length left for incremental buffers ... Incrementally consumed buffer rings are generally fully consumed, but it's quite possible that the application has a minimum size it needs to meet to avoid truncation. Currently that minimum limit is 1 byte, but this should be a setting that is the hands of the application. For recvmsg multishot, a prime use case for incrementally consumed buffers, the application may get spurious -EFAULT returned at the end of an incrementally consumed buffer, as less space is available than the headers need. Grab a u32 field in struct io_uring_buf_reg, which the application can use to inform the kernel of the minimum size that should be available in an incrementally consumed buffer. If less than that is available, the current buffer is fully processed and the next one will be picked. Cc: stable@vger.kernel.org Fixes: ae98dbf43d ("io_uring/kbuf: add support for incremental buffer consumption") Link: https://github.com/axboe/liburing/issues/1433 Signed-off-by: Martin Michaelis <code@mgjm.de> [axboe: write commit message, change io_buffer_list member name] Reviewed-by: Gabriel Krisman Bertazi <krisman@suse.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>		2026-04-28 16:08:56 -06:00
..
android
byteorder
can
cifs
counter
dvb
genwqe
hdlc
hsi
iio
io_uring	io_uring/zcrx: implement device-less mode for zcrx	2026-04-01 10:21:12 -06:00
media
misc
mmc
netfilter	netfilter: nf_tables: add netlink policy based cap on registers	2026-04-08 07:51:31 +02:00
netfilter_arp
netfilter_bridge
netfilter_ipv4
netfilter_ipv6
nfsd	NFSD/export: Add sign_fh export option	2026-03-29 21:25:09 -04:00
raid
sched
spi
sunrpc
surface_aggregator
tc_act
tc_ematch
usb	USB: uapi: add BULK_MAX_PACKET_UPDATE	2026-03-30 16:55:36 +02:00
a.out.h
acct.h
acrn.h
adb.h
adfs_fs.h
affs_hardblocks.h
agpgart.h
aio_abi.h
am437x-vpfe.h
amt.h
apm_bios.h
arcfb.h
arm_sdei.h
aspeed-lpc-ctrl.h
aspeed-p2a-ctrl.h
aspeed-video.h
atalk.h
atm.h
atm_eni.h
atm_he.h
atm_idt77105.h
atm_nicstar.h
atm_tcp.h
atm_zatm.h
atmapi.h
atmarp.h
atmbr2684.h
atmclip.h
atmdev.h
atmioc.h
atmlec.h
atmmpc.h
atmppp.h
atmsap.h
atmsvc.h
audit.h	audit: fix coding style issues	2026-03-05 22:16:08 -05:00
auto_dev-ioctl.h
auto_fs.h
auto_fs4.h
auxvec.h
ax25.h
batadv_packet.h
batman_adv.h
bcm933xx_hcs.h
bfs_fs.h
binfmts.h
bits.h
blk-crypto.h
blkdev.h
blkpg.h
blktrace_api.h
blkzoned.h
bpf.h	bpf: Clarify BPF_RB_NO_WAKEUP behavior for bpf_ringbuf_discard()	2026-03-31 15:46:34 -07:00
bpf_common.h
bpf_perf_event.h
bpqether.h
bsg.h	bsg: add bsg_uring_cmd uapi structure	2026-03-19 11:38:24 -06:00
bt-bmc.h
btf.h	btf: Add BTF kind layout encoding to UAPI	2026-03-26 13:53:56 -07:00
btrfs.h
btrfs_tree.h	btrfs: tree-checker: introduce checks for FREE_SPACE_INFO	2026-04-07 18:56:01 +02:00
cachefiles.h
can.h
capability.h
cciss_defs.h
cciss_ioctl.h
ccs.h
cdrom.h
cec-funcs.h
cec.h
cfm_bridge.h
cgroupstats.h
chio.h
close_range.h
cn_proc.h
coda.h
coff.h
comedi.h
connector.h
const.h	uapi: Provide DIV_ROUND_CLOSEST()	2026-03-18 09:59:57 +00:00
coredump.h
coresight-stm.h
counter.h
cramfs_fs.h
cryptouser.h
cuda.h
cxl_mem.h
cyclades.h
cycx_cfm.h
dcbnl.h
dccp.h
dev_energymodel.h
devlink.h	devlink: Add resource scope filtering to resource dump	2026-04-08 19:55:39 -07:00
dlm.h
dlm_device.h
dlm_plock.h
dlmconstants.h
dm-ioctl.h
dm-log-userspace.h
dma-buf.h	dma-buf: Include ioctl.h in UAPI header	2026-03-03 08:55:39 +01:00
dma-heap.h
dns_resolver.h
dpll.h	dpll: add frequency monitoring to netlink spec	2026-04-03 16:48:01 -07:00
dqblk_xfs.h
dw100.h
edd.h
efs_fs_sb.h
elf-em.h
elf-fdpic.h
elf.h
errno.h
errqueue.h
erspan.h
ethtool.h	net: ethtool: Update doc for tunable	2026-03-05 16:26:52 +01:00
ethtool_netlink.h
ethtool_netlink_generated.h	net: ethtool: add ethtool COALESCE_RX_CQE_FRAMES/NSECS	2026-03-18 20:01:10 -07:00
eventfd.h
eventpoll.h
exfat.h
ext4.h
f2fs.h
fadvise.h
falloc.h
fanotify.h
fb.h
fcntl.h
fd.h
fdreg.h
fib_rules.h
fiemap.h
filter.h
firewire-cdev.h
firewire-constants.h
fou.h
fpga-dfl.h
fs.h	fs: add generic FS_IOC_SHUTDOWN definitions	2026-02-19 21:48:05 +09:00
fscrypt.h
fsi.h
fsl_hypervisor.h
fsl_mc.h
fsmap.h
fsverity.h
fuse.h
futex.h
gameport.h
gen_stats.h
genetlink.h
gfs2_ondisk.h
gpib.h
gpib_ioctl.h
gpio.h
gsmmux.h
gtp.h
handshake.h
hash_info.h
hdlc.h
hdreg.h
hid.h
hiddev.h
hidraw.h
hpet.h
hsr_netlink.h
hw_breakpoint.h
hyperv.h
i2c-dev.h
i2c.h
i2o-dev.h
i8k.h
icmp.h
icmpv6.h
idxd.h
if.h
if_addr.h
if_addrlabel.h
if_alg.h
if_arcnet.h
if_arp.h
if_bonding.h
if_bridge.h
if_eql.h
if_ether.h
if_fc.h
if_fddi.h
if_hippi.h
if_infiniband.h
if_link.h	net: bridge: add stp_mode attribute for STP mode selection	2026-04-10 15:52:24 -07:00
if_ltalk.h
if_macsec.h
if_packet.h
if_phonet.h
if_plip.h
if_ppp.h
if_pppol2tp.h
if_pppox.h	pppoe: remove kernel-mode relay support	2026-02-26 11:41:00 +01:00
if_slip.h
if_team.h
if_tun.h
if_tunnel.h
if_vlan.h
if_x25.h
if_xdp.h
ife.h
igmp.h
ila.h
in.h
in6.h
in_route.h
inet_diag.h	inet_diag: report delayed ack timer information	2026-03-06 16:32:26 -08:00
inotify.h
input-event-codes.h	Input: add keycodes for contextual AI usages (HUTRR119)	2026-03-29 22:02:11 +02:00
input.h
io_uring.h	io_uring/kbuf: support min length left for incremental buffers	2026-04-28 16:08:56 -06:00
ioam6.h
ioam6_genl.h
ioam6_iptunnel.h
ioctl.h
iommufd.h	Merge branches 'fixes', 'arm/smmu/updates', 'arm/smmu/bindings', 'riscv', 'intel/vt-d', 'amd/amd-vi' and 'core' into next	2026-04-09 13:18:27 +01:00
ioprio.h
ip.h
ip6_tunnel.h
ip_vs.h
ipc.h
ipmi.h
ipmi_bmc.h
ipmi_msgdefs.h
ipmi_ssif_bmc.h
ipsec.h
ipv6.h
ipv6_route.h
irqnr.h
iso_fs.h
isst_if.h
ivtv.h
ivtvfb.h
jffs2.h
joystick.h
kcm.h
kcmp.h
kcov.h
kd.h
kdev_t.h
kernel-page-flags.h
kernel.h
kexec.h
keyboard.h	vt: add KT_CSI keysym type for modifier-aware CSI sequences	2026-03-12 15:07:51 +01:00
keyctl.h
kfd_ioctl.h
kfd_sysfs.h
kvm.h	- ESA nesting support	2026-04-13 19:01:15 +02:00
kvm_para.h
l2tp.h
landlock.h	landlock: Control pathname UNIX domain socket resolution by path	2026-04-07 18:51:06 +02:00
libc-compat.h
limits.h
lirc.h
liveupdate.h
llc.h
loadpin.h
lockd_netlink.h
loop.h
lp.h
lsm.h
lwtunnel.h
magic.h
major.h
map_benchmark.h	dma-mapping: benchmark: add support for dma_map_sg	2026-03-04 11:22:05 +01:00
map_to_7segment.h
map_to_14segment.h
matroxfb.h
max2175.h
mctp.h
mdio.h
media-bus-format.h
media.h
mei.h
mei_uuid.h
membarrier.h
memfd.h
mempolicy.h
mii.h	net: phy: qcom: at803x: Use the correct bit to disable extended next page	2026-04-13 14:36:22 -07:00
minix_fs.h
mman.h
mmtimer.h
module.h
module_signature.h	module: Move 'struct module_signature' to UAPI	2026-03-24 21:42:37 +00:00
mount.h	mount: add FSMOUNT_NAMESPACE	2026-03-12 13:33:54 +01:00
mpls.h
mpls_iptunnel.h
mptcp.h
mptcp_pm.h	mptcp: fix kdoc warnings	2026-02-06 20:35:06 -08:00
mqueue.h
mroute.h
mroute6.h
mrp_bridge.h
msdos_fs.h
msg.h
mshv.h	mshv_vtl: Fix vmemmap_shift exceeding MAX_FOLIO_ORDER	2026-04-14 04:44:31 +00:00
mtio.h
nbd-netlink.h
nbd.h
ncsi.h
ndctl.h
neighbour.h
net.h
net_dropmon.h
net_namespace.h
net_shaper.h
net_tstamp.h
netconf.h
netdev.h	net: Add queue-create operation	2026-04-09 18:21:45 -07:00
netdevice.h
netfilter.h
netfilter_arp.h
netfilter_bridge.h	include: uapi: netfilter_bridge.h: Cover for musl libc	2026-02-17 15:04:20 +01:00
netfilter_ipv4.h
netfilter_ipv6.h
netlink.h
netlink_diag.h
nexthop.h
nfc.h	NFC: fix header file kernel-doc warnings	2026-02-27 19:21:56 -08:00
nfs.h
nfs2.h
nfs3.h
nfs4.h
nfs4_mount.h
nfs_fs.h
nfs_idmap.h
nfs_mount.h
nfsacl.h
nfsd_netlink.h	NFSD: Add a key for signing filehandles	2026-03-29 21:25:09 -04:00
nilfs2_api.h
nilfs2_ondisk.h
nitro_enclaves.h
nl80211-vnd-intel.h
nl80211.h	wifi: nl80211: Add a notification to notify NAN channel evacuation	2026-03-25 20:56:55 +01:00
npcm-video.h
nsfs.h
nsm.h
ntsync.h
nubus.h
nvme_ioctl.h
nvram.h
omap3isp.h
omapfb.h
oom.h
openat2.h
openvswitch.h	net: openvswitch: clean up some kernel-doc warnings	2026-03-04 17:52:46 -08:00
ovpn.h	ovpn: add support for asymmetric peer IDs	2026-03-17 11:09:05 +01:00
packet_diag.h
papr_pdsm.h
param.h
parport.h
patchkey.h
pci.h
pci_regs.h	PCI: Correct PCI_CAP_EXP_ENDPOINT_SIZEOF_V2 value	2026-02-27 10:24:25 -06:00
pcitest.h
perf_event.h	Performance events changes for v7.0:	2026-02-10 12:00:46 -08:00
personality.h
pfkeyv2.h
pfrut.h
pg.h
phantom.h
phonet.h
pidfd.h	pidfds: add coredump_code field to pidfd_info	2026-03-23 16:29:15 +01:00
pkt_cls.h
pkt_sched.h
pktcdvd.h
pmu.h
poll.h
posix_acl.h
posix_acl_xattr.h
posix_types.h
ppdev.h
ppp-comp.h
ppp-ioctl.h
ppp_defs.h
pps.h
pps_gen.h
pr.h
prctl.h	prctl: cfi: change the branch landing pad prctl()s to be more descriptive	2026-04-04 18:40:58 -06:00
psample.h
psci.h
psp-dbc.h
psp-sev.h	include/psp-sev.h: fix structure member in comment	2026-03-14 14:03:19 +09:00
psp-sfs.h
psp.h
ptp_clock.h
ptrace.h
pwm.h
qemu_fw_cfg.h
qnx4_fs.h
qnxtypes.h
qrtr.h
quota.h
radeonfb.h
random.h
rds.h
reboot.h
remoteproc_cdev.h
resource.h
rfkill.h
rio_cm_cdev.h
rio_mport_cdev.h
rkisp1-config.h
romfs_fs.h
route.h
rpl.h
rpl_iptunnel.h
rpmsg.h
rpmsg_types.h
rseq.h	rseq: slice ext: Ensure rseq feature size differs from original rseq size	2026-02-23 11:19:19 +01:00
rtc.h
rtnetlink.h
rxrpc.h
sched.h	vfs-7.1-rc1.mount.v2	2026-04-14 19:59:25 -07:00
scif_ioctl.h
screen_info.h
sctp.h
seccomp.h
securebits.h
sed-opal.h	sed-opal: Add STACK_RESET command	2026-03-31 07:04:00 -06:00
seg6.h
seg6_genl.h
seg6_hmac.h
seg6_iptunnel.h	seg6: add per-route tunnel source address	2026-03-26 18:45:29 -07:00
seg6_local.h
selinux_netlink.h
sem.h
serial.h
serial_core.h
serial_reg.h
serio.h
sev-guest.h
shm.h
signal.h
signalfd.h
smc.h
smc_diag.h
smiapp.h
snmp.h
sock_diag.h
socket.h
sockios.h
sonet.h
sonypi.h
sound.h
soundcard.h
stat.h
stddef.h
stm.h
string.h
suspend_ioctls.h
swab.h
switchtec_ioctl.h
sync_file.h
synclink.h
sysctl.h	mm.git review status for linus..mm-stable	2026-02-12 11:32:37 -08:00
sysinfo.h
target_core_user.h
taskstats.h	delayacct: fix uapi timespec64 definition	2026-02-08 00:13:32 -08:00
tcp.h
tcp_metrics.h
tdx-guest.h
tee.h
termios.h
thermal.h
thp7312.h
time.h
time_types.h
timerfd.h
times.h
timex.h
tiocl.h
tipc.h
tipc_config.h
tipc_netlink.h
tipc_sockets_diag.h
tls.h
toshiba.h
tps6594_pfsm.h
trace_mmap.h	tracing updates for v7.1:	2026-04-17 09:43:12 -07:00
tty.h
tty_flags.h
typelimits.h
types.h
ublk_cmd.h	ublk: widen ublk_shmem_buf_reg.len to __u64 for 4GB buffer support	2026-04-09 19:08:35 -06:00
udf_fs_i.h
udmabuf.h
udp.h	udp: Remove UDPLITE_SEND_CSCOV and UDPLITE_RECV_CSCOV.	2026-03-13 18:57:45 -07:00
uhid.h
uinput.h
uio.h
uleds.h
ultrasound.h
um_timetravel.h	um: time-travel: clean up kernel-doc warnings	2026-03-21 10:42:09 +01:00
un.h
unistd.h
unix_diag.h
usbdevice_fs.h
usbip.h
user_events.h
userfaultfd.h
userio.h
utime.h
utsname.h
uuid.h
uvcvideo.h
v4l2-common.h
v4l2-controls.h
v4l2-dv-timings.h
v4l2-mediabus.h
v4l2-subdev.h
vbox_err.h
vbox_vmmdev_types.h
vboxguest.h
vdpa.h
vduse.h	vduse: avoid adding implicit padding	2026-02-09 12:21:32 -05:00
vesa.h
veth.h
vfio.h	vfio: Define uAPI for re-init initial bytes during the PRE_COPY phase	2026-03-19 12:32:08 -06:00
vfio_ccw.h
vfio_zdev.h
vhost.h
vhost_types.h
videodev2.h
virtio_9p.h
virtio_balloon.h
virtio_blk.h
virtio_bt.h
virtio_config.h
virtio_console.h
virtio_crypto.h
virtio_fs.h
virtio_gpio.h
virtio_gpu.h
virtio_i2c.h
virtio_ids.h
virtio_input.h
virtio_iommu.h
virtio_mem.h
virtio_mmio.h
virtio_net.h
virtio_pci.h
virtio_pcidev.h
virtio_pmem.h
virtio_ring.h
virtio_rng.h
virtio_rtc.h
virtio_scmi.h
virtio_scsi.h
virtio_snd.h
virtio_spi.h
virtio_types.h
virtio_vsock.h
vm_sockets.h
vm_sockets_diag.h
vmclock-abi.h
vmcore.h
vsockmon.h
vt.h
vtpm_proxy.h
wait.h
watch_queue.h
watchdog.h
wireguard.h
wireless.h
wmi.h
wwan.h
x25.h
xattr.h
xdp_diag.h
xfrm.h
xilinx-v4l2-controls.h
zorro.h
zorro_ids.h