Module types

Available on crate feature dep_nc only.

Structs

__kernel_fsid_t

aio_sigset_t

blk_io_trace_remap_t

The remap event

blk_io_trace_t

The trace itself

blk_user_trace_setup_t

User setup structure passed with BLKTRACESETUP

bpf_attr_btf_load_t

anonymous struct for BPF_BTF_LOAD

bpf_attr_element_t

anonymous struct used by BPF_MAP_*_ELEM commands

bpf_attr_getid_t

anonymous struct used by BPF_*_GET_*_ID

bpf_attr_info_t

anonymous struct used by BPF_OBJ_GET_INFO_BY_FD

bpf_attr_map_create_t

anonymous struct used by BPF_MAP_CREATE command

bpf_attr_obj_t

anonymous struct used by BPF_OBJ_* commands

bpf_attr_prog_attach_t

anonymous struct used by BPF_PROG_ATTACH/DETACH commands

bpf_attr_prog_load_t

anonymous struct used by BPF_PROG_LOAD command

bpf_attr_prog_test_t

anonymous struct used by BPF_PROG_TEST_RUN command

bpf_attr_query_t

anonymous struct used by BPF_PROG_QUERY command

bpf_attr_raw_tracepoint_t

bpf_attr_task_fd_query_t

bpf_btf_info_t

bpf_cgroup_dev_ctx_t

bpf_cgroup_storage_key_t

bpf_fib_lookup_t

bpf_flow_keys_ipv4_t

bpf_flow_keys_ipv6_t

bpf_flow_keys_t

bpf_func_info_t

bpf_insn_t

bpf_line_info_t

bpf_lpm_trie_key_t

Key of a BPF_MAP_TYPE_LPM_TRIE entry

bpf_map_info_t

bpf_perf_event_value_t

bpf_prog_info_t

bpf_raw_tracepoint_args_t

bpf_sock_addr_t

Use bpf_sock_addr struct to access socket fields and sockaddr struct passed by user and intended to be used by socket (e.g. to bind to, depends on attach attach type).

bpf_sock_ops_t

User bpf_sock_ops struct to access socket values and specify request ops and their replies.

bpf_sock_t

bpf_sock_tuple_ipv4_t

bpf_sock_tuple_ipv6_t

bpf_spin_lock_t

bpf_stack_build_id_t

bpf_tcp_sock_t

cachestat_range_t

cachestat_t

cap_user_data_t

cap_user_header_t

clone_args_t

Arguments for the clone3 syscall.

cmsghdr_t

POSIX 1003.1g - ancillary data object information Ancillary data consits of a sequence of pairs of (cmsghdr, cmsg_data[])

compat_statfs64_t

IA64 and x86_64 need to avoid the 32-bit padding at the end, to be compatible with the i386 ABI

cpu_set_t

epoll_event_t

f_owner_ex_t

fd_set_t

fiemap_extent_t

fiemap_t

file_clone_range_t

file_dedupe_range_info_t

from struct btrfs_ioctl_file_extent_same_info

file_dedupe_range_t

from struct btrfs_ioctl_file_extent_same_args

file_handle_t

files_stat_struct_t

And dynamically-tunable limits and defaults:

flock64_t

flock_t

fscrypt_policy_t

fsid_t

fstrim_range_t

fsxattr_t

Structure for FS_IOC_FSGETXATTR[A] and FS_IOC_FSSETXATTR.

futex_waitv_t

A waiter for vectorized wait.

getcpu_cache_t

Cache for getcpu() to speed it up. Results might be a short time out of date, but will be faster.

group_filter_t

group_req_t

group_source_req_t

if_dqblk_t

if_dqinfo_t

if_nextdqblk_t

in6_addr_t

in6_flowlabel_req_t

in_addr_t

Internet address.

in_pktinfo_t

inodes_stat_t

inotify_event_t

struct inotify_event - structure read from the inotify device for each event

io_cqring_offsets_t

io_event_t

read() from /dev/aio returns these structures.

io_file_t

io_sqring_offsets_t

Filled with the offset for mmap(2)

io_uring_cqe_t

IO completion data structure (Completion Queue Entry)

io_uring_files_update_t

io_uring_params_t

Passed in for io_uring_setup(2). Copied back with updated info on success

io_uring_probe_op_t

io_uring_probe_t

io_uring_sqe_buf_t

io_uring_sqe_t

IO submission data structure (Submission Queue Entry)

iocb_t

we always use a 64bit off_t when communicating with userland. its up to libraries to do the proper padding and aio_error abstraction

iovec_t

Berkeley style UIO structures

ip_mreq_source_t

ip_mreq_t

Request struct for multicast socket ops

ip_mreqn_t

ip_msfilter_t

ipc64_perm_t

The generic ipc64_perm structure: Note extra padding because this structure is passed back and forth between kernel and user space.

ipc_kludge_t

These are used to wrap system calls. See architecture code for ugly details..

ipc_perm_t

Obsolete, used only for backwards compatibility and libc5 compiles

ipv6_mreq_t

itimerspec64_t

itimerspec_t

itimerval_t

kcmp_epoll_slot_t

Slot for KCMP_EPOLL_TFD

kernel_clone_args_t

kernel_itimerspec_t

kernel_sock_timeval_t

kernel_sockaddr_storage_t

kernel_timespec_t

kernel_timex_t

kernel_timex_timeval_t

kernle_old_timeval_t

legacy timeval structure, only embedded in structures that traditionally used ‘timeval’ to pass time intervals (not absolute times).

kexec_segment_t

This structure is used to hold the arguments that are used when loading kernel binaries.

ktermios_t

linger_t

linux_dirent64_t

linux_dirent_t

mmsghdr_t

For recvmmsg/sendmmsg

mnt_id_req_t

Structure for passing mount ID and miscellaneous parameters to statmount(2) and listmount(2).

mount_attr_t

mount_setattr()

mq_attr_t

msgbuf_t

message buffer for msgsnd and msgrcv calls

msghdr_t

As we do 4.4BSD message passing we use a 4.4BSD message passing system, not 4.3. Thus msg_accrights(len) are now missing. They belong in an obscure libc emulation or the bin.

msginfo_t

buffer for msgctl calls IPC_INFO, MSG_INFO

msqid64_ds_t

Generic msqid64_ds structure.

msqid_ds_t

new_utsname_t

open_how_t

Arguments for how openat2(2) should open the target path. If only flags and mode are non-zero, then openat2(2) operates very similarly to openat(2).

perf_branch_entry_t

single taken branch record layout:

perf_event_attr_t

Hardware event_id to monitor via a performance monitoring event:

perf_event_header_t

perf_event_mmap_page_cap_detail_t

perf_event_mmap_page_t

Structure of the page that can be mapped via mmap

perf_event_query_bpf_t

Structure used by below PERF_EVENT_IOC_QUERY_BPF command to query bpf programs attached to the same perf tracepoint as the given perf event.

perf_mem_data_mem_t

perf_ns_link_info_t

pollfd_t

prctl_mm_map_t

This structure provides new memory descriptor map which mostly modifies /proc/pid/stat[m] output for a task. This mostly done in a sake of checkpoint/restore functionality.

pthread_barrierattr_t

pthread_condattr_t

pthread_mutexattr_t

pthread_rwlockattr_t

ptrace_peeksiginfo_args_t

ptrace_syscall_info_seccomp_entry_t

ptrace_syscall_info_seccomp_exit_t

ptrace_syscall_info_seccomp_seccomp_t

ptrace_syscall_info_t

rlimit64_t

rlimit_t

robust_list_head_t

Per-thread list head:

robust_list_t

Support for robust futexes: the kernel cleans up held futexes at thread exit time.

rseq_cs_ptr_t

rseq_cs_t

struct rseq_cs is aligned on 4 * 8 bytes to ensure it is always contained within a single cache-line. It is usually declared as link-time constant data.

rseq_t

struct rseq is aligned on 4 * 8 bytes to ensure it is always contained within a single cache-line.

rusage_t

sched_attr_t

Extended scheduling parameters data structure.

sched_param_t

scm_timestamping_internal_t

seccomp_data_t

struct seccomp_data - the format the BPF program executes over.

seccomp_metadata_t

seccomp_notif_resp_t

seccomp_notif_sizes_t

seccomp_notif_t

sembuf_t

semop system calls takes an array of these.

semid_ds_t

Obsolete, used only for backwards compatibility and libc5 compiles

seminfo_t

serial_icounter_struct_t

Serial input interrupt line counters – external structure Four lines can interrupt: CTS, DSR, RI, DCD

serial_iso7816_t

Serial interface for controlling ISO7816 settings on chips with suitable support. Set with TIOCSISO7816 and get with TIOCGISO7816 if supported by your platform.

serial_multiport_struct_t

Multiport serial configuration structure — external structure

serial_rs485_t

Serial interface for controlling RS485 settings on chips with suitable support.

serial_struct_t

shm_info_t

shmid64_ds_t

The shmid64_ds structure for x86 architecture. Note extra padding because this structure is passed back and forth between kernel and user space.

shmid_ds_t

Obsolete, used only for backwards compatibility and libc5 compiles

shminfo64_t

shminfo_t

Obsolete, used only for backwards compatibility

si_kill_t

kill()

si_rt_t

POSIX.1b signals

si_sigchld_t

SIGCHLD

si_sigpoll_t

SIGPOLL

si_sigsys_t

SIGSYS

si_timer_t

POSIX.1b timers

sigaction_t

sigaltstack_t

sigev_thread_t

sigevent_t

siginfo_intern_t

sigset_t

sk_msg_md_t

user accessible metadata for SK_MSG packet hook, new fields must be added to the end of this structure

sk_reuseport_md_t

sockaddr_in6_t

sockaddr_in_t

sockaddr_t

1003.1g requires sa_family_t and that sa_data is char.

stat_t

statfs64_t

ARM needs to avoid the 32-bit padding at the end, for consistency between EABI and OABI

statfs_t

statmount_t

Structure for getting mount/superblock/filesystem info with statmount(2).

statx_t

Structures for the extended file attribute retrieval system call (statx()).

statx_timestamp_t

Timestamp structure for the timestamps in struct statx.

sysctl_args_t

sysinfo_t

termio_t

termios2_t

termios_t

timespec64_t

timespec_t

timeval_t

timex_t

syscall interface - used (mainly by NTP daemon) to discipline kernel clock oscillator

timezone_t

tms_t

ucred_t

user_desc_t

Note on 64bit base and limit is ignored and you cannot set DS/ES/CS not to the default values if you still want to do syscalls. This call is more for 32bit mode therefore.

ustat_t

utimbuf_t

winsize_t

xdp_md_t

user accessible metadata for XDP packet hook new fields must be added to the end of this structure

Enums

IOURING_OP

perf_bpf_event_type_t

perf_branch_sample_type_shift_t

values to program into branch_sample_type when PERF_SAMPLE_BRANCH is set

perf_branch_sample_type_t

perf_callchain_context_t

perf_event_read_format_t

The format of the data returned by read() on a perf event fd as specified by attr.read_format:

perf_event_sample_format_t

Bits that can be set in attr.sample_type to request information in the overflow packets.

perf_event_type_t

perf_event_type

perf_hw_cache_id_t

Generalized hardware cache events:

perf_hw_cache_op_id_t

perf_hw_cache_op_result_id_t

perf_hw_id_t

Generalized performance event event_id types, used by the attr.event_id parameter of the sys_perf_event_open() syscall: Common hardware events, generalized by the kernel:

perf_record_ksymbol_type_t

perf_sample_regs_abi_t

Values to determine ABI of the registers dump.

perf_sw_ids_t

Special “software” events provided by the kernel, even if the hardware does not support performance events.

perf_type_id_t

attr.type

Constants

ABI_DEFHANDLER_COFF

/proc/sys/abi

ABI_DEFHANDLER_ELF

default handler for ELF binaries

ABI_DEFHANDLER_LCALL7

default handler for procs using lcall7

ABI_DEFHANDLER_LIBCSO

default handler for an libc.so ELF interp

ABI_FAKE_UTSNAME

fake target utsname information

ABI_TRACE

tracing flags

ADDRB

address bit

ADDR_COMPAT_LAYOUT

ADDR_LIMIT_3GB

ADDR_LIMIT_32BIT

ADDR_NO_RANDOMIZE

disable randomization of VA space

ADJ_ESTERROR

estimated time error

ADJ_FREQUENCY

frequency offset

ADJ_MAXERROR

maximum time error

ADJ_MICRO

select microsecond resolution

ADJ_NANO

select nanosecond resolution

ADJ_OFFSET

Mode codes (timex.mode) time offset

ADJ_OFFSET_SINGLESHOT

old-fashioned adjtime

ADJ_OFFSET_SS_READ

read-only adjtime

ADJ_SETOFFSET

add ‘time’ to current time

ADJ_STATUS

clock status

ADJ_TAI

set TAI offset

ADJ_TICK

tick value

ADJ_TIMECONST

pll time constant

AF_ALG

Algorithm sockets

AF_APPLETALK

AppleTalk DDP

AF_ASH

Ash

AF_ATMPVC

ATM PVCs

AF_ATMSVC

ATM SVCs

AF_AX25

Amateur Radio AX.25

AF_BLUETOOTH

Bluetooth sockets

AF_BRIDGE

Multiprotocol bridge

AF_CAIF

CAIF sockets

AF_CAN

Controller Area Network

AF_DECNET

Reserved for DECnet project

AF_ECONET

Acorn Econet

AF_IB

Native InfiniBand address

AF_IEEE802154

IEEE802154 sockets

AF_INET

Internet IP Protocol

AF_INET6

IP version 6

AF_IPX

Novell IPX

AF_IRDA

IRDA sockets

AF_ISDN

mISDN sockets

AF_IUCV

IUCV sockets

AF_KCM

Kernel Connection Multiplexor

AF_KEY

PF_KEY key management API

AF_LLC

Linux LLC

AF_LOCAL

POSIX name for AF_UNIX

AF_MAX

For now..

AF_MPLS

MPLS

AF_NETBEUI

Reserved for 802.2LLC project

AF_NETLINK

AF_NETROM

Amateur Radio NET/ROM

AF_NFC

NFC sockets

AF_PACKET

Packet family

AF_PHONET

Phonet sockets

AF_PPPOX

PPPoX sockets

AF_QIPCRTR

Qualcomm IPC Router

AF_RDS

RDS sockets

AF_ROSE

Amateur Radio X.25 PLP

AF_ROUTE

Alias to emulate 4.4BSD

AF_RXRPC

RxRPC sockets

AF_SECURITY

Security callback pseudo AF

AF_SMC

smc sockets: reserve number for PF_SMC protocol family that reuses AF_INET address family

AF_SNA

Linux SNA Project (nutters!)

AF_TIPC

TIPC sockets

AF_UNIX

Unix domain sockets

AF_UNSPEC

Supported address families.

AF_VSOCK

vSockets

AF_WANPIPE

Wanpipe API Sockets

AF_X25

Reserved for X.25 project

AF_XDP

XDP sockets

ALL_FANOTIFY_EVENT_BITS

ARCH_ENABLE_TAGGED_ADDR

ARCH_FORCE_TAGGED_SVA

ARCH_GET_CPUID

ARCH_GET_FS

ARCH_GET_GS

ARCH_GET_MAX_TAG_BITS

ARCH_GET_UNTAG_MASK

Don’t use 0x3001-0x3004 because of old glibcs

ARCH_GET_XCOMP_GUEST_PERM

ARCH_GET_XCOMP_PERM

ARCH_GET_XCOMP_SUPP

ARCH_MAP_VDSO_32

ARCH_MAP_VDSO_64

ARCH_MAP_VDSO_X32

ARCH_REQ_XCOMP_GUEST_PERM

ARCH_REQ_XCOMP_PERM

ARCH_SET_CPUID

ARCH_SET_FS

ARCH_SET_GS

ARCH_SHSTK_DISABLE

ARCH_SHSTK_ENABLE

ARCH_SHSTK_LOCK

ARCH_SHSTK_SHSTK

ARCH_SHSTK_ features bits

ARCH_SHSTK_STATUS

ARCH_SHSTK_UNLOCK

ARCH_SHSTK_WRSS

ARCH_XCOMP_TILECFG

ARCH_XCOMP_TILEDATA

ARG_MAX

bytes of args + environ for exec()

ASYNC_CLOSING_WAIT_INF

For the close wait times, 0 means wait forever for serial port to flush its output. 65535 means don’t wait at all.

ASYNC_CLOSING_WAIT_NONE

AT_EMPTY_PATH

Allow empty relative pathname

AT_FDCWD

Special value used to indicate openat should use the current working directory.

AT_NO_AUTOMOUNT

Suppress terminal automount traversal

AT_RECURSIVE

Apply to the entire subtree

AT_REMOVEDIR

Remove directory instead of unlinking file.

AT_STATX_DONT_SYNC

Don’t sync attributes with the server

AT_STATX_FORCE_SYNC

Force the attributes to be sync’d with the server

AT_STATX_SYNC_AS_STAT

Do whatever stat() does

AT_STATX_SYNC_TYPE

Type of synchronisation required from statx()

AT_SYMLINK_FOLLOW

Follow symbolic links.

AT_SYMLINK_NOFOLLOW

Do not follow symbolic links.

B0

c_cflag bit meaning

B50

B75

B110

B134

B150

B200

B300

B600

B1200

B1800

B2400

B4800

B9600

B19200

B38400

B57600

B115200

B230400

B460800

B500000

B576000

B921600

B1000000

B1152000

B1500000

B2000000

B2500000

B3000000

B3500000

B4000000

BITS_PER_LONG

BITS_PER_LONG_LONG

BLKALIGNOFF

BLKBSZGET

BLKBSZSET

BLKDISCARD

BLKDISCARDZEROES

BLKFLSBUF

flush buffer cache

BLKFRAGET

get filesystem (mm/filemap.c) read-ahead

BLKFRASET

set filesystem (mm/filemap.c) read-ahead

BLKGETSIZE

return device size /512 (long *arg)

BLKGETSIZE64

return device size in bytes (u64 *arg)

BLKIOMIN

BLKIOOPT

BLKPBSZGET

BLKRAGET

get current read ahead setting

BLKRASET

set read ahead for block device

BLKROGET

get read-only status (0 = read_write)

BLKROSET

the read-only stuff doesn’t really belong here, but any other place is probably as bad and I don’t want to create yet another include file. set device read-only (0 = read-write)

BLKROTATIONAL

BLKRRPART

re-read partition table

BLKSECDISCARD

BLKSECTGET

get max sectors per request (ll_rw_blk.c)

BLKSECTSET

set max sectors per request (ll_rw_blk.c)

BLKSSZGET

get block device sector size

BLKTRACESETUP

BLKTRACESTART

BLKTRACESTOP

BLKTRACETEARDOWN

BLKTRACE_BDEV_SIZE

BLKZEROOUT

BLK_IO_TRACE_MAGIC

BLK_IO_TRACE_VERSION

BLK_TA_ABORT

BLK_TA_BACKMERGE

BLK_TA_BOUNCE

BLK_TA_COMPLETE

BLK_TA_DRV_DATA

BLK_TA_FRONTMERGE

BLK_TA_GETRQ

BLK_TA_INSERT

BLK_TA_ISSUE

BLK_TA_PLUG

BLK_TA_QUEUE

Trace actions in full.

BLK_TA_REMAP

BLK_TA_REQUEUE

BLK_TA_SLEEPRQ

BLK_TA_SPLIT

BLK_TA_UNPLUG_IO

BLK_TA_UNPLUG_TIMER

BLK_TC_AHEAD

readahead

BLK_TC_COMPLETE

completions

BLK_TC_DISCARD

discard requests

BLK_TC_DRV_DATA

binary per-driver data

BLK_TC_END

BLK_TC_FLUSH

flush

BLK_TC_FS

fs requests

BLK_TC_FUA

fua requests

BLK_TC_ISSUE

issue

BLK_TC_META

metadata

BLK_TC_NOTIFY

special message

BLK_TC_PC

pc requests

BLK_TC_QUEUE

queueing/merging

BLK_TC_READ

reads

BLK_TC_REQUEUE

requeueing

BLK_TC_SHIFT

BLK_TC_SYNC

sync IO

BLK_TC_SYNCIO

BLK_TC_WRITE

writes

BLK_TN_MESSAGE

BLK_TN_PROCESS

BLK_TN_TIMESTAMP

BLOCK_SIZE

BLOCK_SIZE_BITS

BMAP_IOCTL

obsolete - kept for compatibility

BOTHER

BPF_ADJ_ROOM_NET

Mode for BPF_FUNC_skb_adjust_room helper.

BPF_ALU64

alu mode in double word width

BPF_ANY

flags for BPF_MAP_UPDATE_ELEM command create new element or update existing

BPF_ARSH

sign extending arithmetic shift right

BPF_BTF_GET_FD_BY_ID

BPF_BTF_LOAD

BPF_BUILD_ID_SIZE

BPF_CALL

function call

BPF_CGROUP_DEVICE

BPF_CGROUP_INET4_BIND

BPF_CGROUP_INET4_CONNECT

BPF_CGROUP_INET4_POST_BIND

BPF_CGROUP_INET6_BIND

BPF_CGROUP_INET6_CONNECT

BPF_CGROUP_INET6_POST_BIND

BPF_CGROUP_INET_EGRESS

BPF_CGROUP_INET_INGRESS

BPF_CGROUP_INET_SOCK_CREATE

BPF_CGROUP_SOCK_OPS

BPF_CGROUP_UDP4_SENDMSG

BPF_CGROUP_UDP6_SENDMSG

BPF_DEVCG_ACC_MKNOD

BPF_DEVCG_ACC_READ

BPF_DEVCG_ACC_WRITE

BPF_DEVCG_DEV_BLOCK

BPF_DEVCG_DEV_CHAR

BPF_DROP

BPF_DW

ld/ldx fields double word (64-bit)

BPF_END

change endianness of a register flags for endianness conversion:

BPF_EXIST

update existing element

BPF_EXIT

function return

BPF_FD_TYPE_KPROBE

(symbol + offset) or addr

BPF_FD_TYPE_KRETPROBE

(symbol + offset) or addr

BPF_FD_TYPE_RAW_TRACEPOINT

tp name

BPF_FD_TYPE_TRACEPOINT

tp name

BPF_FD_TYPE_UPROBE

filename + offset

BPF_FD_TYPE_URETPROBE

filename + offset

BPF_FIB_LKUP_RET_BLACKHOLE

dest is blackholed; can be dropped

BPF_FIB_LKUP_RET_FRAG_NEEDED

fragmentation required to fwd

BPF_FIB_LKUP_RET_FWD_DISABLED

fwding is not enabled on ingress

BPF_FIB_LKUP_RET_NOT_FWDED

packet is not forwarded

BPF_FIB_LKUP_RET_NO_NEIGH

no neighbor entry for nh

BPF_FIB_LKUP_RET_PROHIBIT

dest not allowed; can be dropped

BPF_FIB_LKUP_RET_SUCCESS

lookup successful

BPF_FIB_LKUP_RET_UNREACHABLE

dest is unreachable; can be dropped

BPF_FIB_LKUP_RET_UNSUPP_LWT

fwd requires encapsulation

BPF_FIB_LOOKUP_DIRECT

DIRECT: Skip the FIB rules and go to FIB table associated with device OUTPUT: Do lookup from egress perspective; default is ingress

BPF_FIB_LOOKUP_OUTPUT

BPF_FLOW_DISSECTOR

BPF_FROM_BE

BPF_FROM_LE

BPF_F_ALLOW_MULTI

BPF_F_ALLOW_OVERRIDE

cgroup-bpf attach flags used in BPF_PROG_ATTACH command

BPF_F_ANY_ALIGNMENT

If BPF_F_ANY_ALIGNMENT is used in BPF_PROF_LOAD command, the verifier will allow any alignment whatsoever.

BPF_F_CTXLEN_MASK

BPF_FUNC_perf_event_output for sk_buff input context.

BPF_F_CURRENT_CPU

BPF_F_CURRENT_NETNS

Current network namespace

BPF_F_DONT_FRAGMENT

BPF_F_FAST_STACK_CMP

flags used by BPF_FUNC_get_stackid only.

BPF_F_HDR_FIELD_MASK

BPF_FUNC_l3_csum_replace and BPF_FUNC_l4_csum_replace flags.

BPF_F_INDEX_MASK

BPF_FUNC_perf_event_output, BPF_FUNC_perf_event_read and BPF_FUNC_perf_event_read_value flags.

BPF_F_INGRESS

BPF_FUNC_clone_redirect and BPF_FUNC_redirect flags.

BPF_F_INVALIDATE_HASH

BPF_F_LOCK

spin_lock-ed map_lookup/map_update

BPF_F_MARK_ENFORCE

BPF_F_MARK_MANGLED_0

BPF_F_NO_COMMON_LRU

Instead of having one common LRU list in the BPF_MAP_TYPE_LRU_[PERCPU_] HASH map, use a percpu LRU list which can scale and perform better.

BPF_F_NO_PREALLOC

flags for BPF_MAP_CREATE command

BPF_F_NUMA_NODE

Specify numa node during map creation

BPF_F_PSEUDO_HDR

BPF_FUNC_l4_csum_replace flags.

BPF_F_QUERY_EFFECTIVE

flags for BPF_PROG_QUERY

BPF_F_RDONLY

Flags for accessing BPF object

BPF_F_RECOMPUTE_CSUM

BPF_FUNC_skb_store_bytes flags.

BPF_F_REUSE_STACKID

BPF_F_SEQ_NUMBER

BPF_F_SKIP_FIELD_MASK

flags for both BPF_FUNC_get_stackid and BPF_FUNC_get_stack.

BPF_F_STACK_BUILD_ID

Flag for stack_map, store build_id+offset instead of pointer

BPF_F_STRICT_ALIGNMENT

The verifier will perform strict alignment checking.

BPF_F_TUNINFO_IPV6

BPF_FUNC_skb_set_tunnel_key and BPF_FUNC_skb_get_tunnel_key flags.

BPF_F_USER_BUILD_ID

flags used by BPF_FUNC_get_stack only.

BPF_F_USER_STACK

BPF_F_WRONLY

BPF_F_ZERO_CSUM_TX

BPF_FUNC_skb_set_tunnel_key flags.

BPF_F_ZERO_SEED

Zero-initialize hash function seed. This should only be used for testing.

BPF_HDR_START_MAC

Mode for BPF_FUNC_skb_load_bytes_relative helper.

BPF_HDR_START_NET

BPF_JLE

LE is unsigned, ‘<=’

BPF_JLT

LT is unsigned, ‘<’

BPF_JMP32

Extended instruction set based on top of classic BPF instruction classes jmp mode in word width

BPF_JNE

jmp encodings jump !=

BPF_JSGE

SGE is signed ‘>=’, GE in x86

BPF_JSGT

SGT is signed ‘>’, GT in x86

BPF_JSLE

SLE is signed, ‘<=’

BPF_JSLT

SLT is signed, ‘<’

BPF_LIRC_MODE2

BPF_LWT_ENCAP_IP

BPF_LWT_ENCAP_SEG6

Encapsulation type for BPF_FUNC_lwt_push_encap helper.

BPF_LWT_ENCAP_SEG6_INLINE

BPF_LWT_REROUTE

BPF_MAP_CREATE

BPF syscall commands, see bpf(2) man-page for details.

BPF_MAP_DELETE_ELEM

BPF_MAP_GET_FD_BY_ID

BPF_MAP_GET_NEXT_ID

BPF_MAP_GET_NEXT_KEY

BPF_MAP_LOOKUP_AND_DELETE_ELEM

BPF_MAP_LOOKUP_ELEM

BPF_MAP_TYPE_ARRAY

BPF_MAP_TYPE_ARRAY_OF_MAPS

BPF_MAP_TYPE_CGROUP_ARRAY

BPF_MAP_TYPE_CGROUP_STORAGE

BPF_MAP_TYPE_CPUMAP

BPF_MAP_TYPE_DEVMAP

BPF_MAP_TYPE_HASH

BPF_MAP_TYPE_HASH_OF_MAPS

BPF_MAP_TYPE_LPM_TRIE

BPF_MAP_TYPE_LRU_HASH

BPF_MAP_TYPE_LRU_PERCPU_HASH

BPF_MAP_TYPE_PERCPU_ARRAY

BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE

BPF_MAP_TYPE_PERCPU_HASH

BPF_MAP_TYPE_PERF_EVENT_ARRAY

BPF_MAP_TYPE_PROG_ARRAY

BPF_MAP_TYPE_QUEUE

BPF_MAP_TYPE_REUSEPORT_SOCKARRAY

BPF_MAP_TYPE_SOCKHASH

BPF_MAP_TYPE_SOCKMAP

BPF_MAP_TYPE_STACK

BPF_MAP_TYPE_STACK_TRACE

BPF_MAP_TYPE_UNSPEC

BPF_MAP_TYPE_XSKMAP

BPF_MAP_UPDATE_ELEM

BPF_MOV

alu/jmp fields mov reg to reg

BPF_NOEXIST

create new element if it didn’t exist

BPF_OBJ_GET

BPF_OBJ_GET_INFO_BY_FD

BPF_OBJ_NAME_LEN

BPF_OBJ_PIN

BPF_OK

Generic BPF return codes which all BPF program types may support.

BPF_PROG_ATTACH

BPF_PROG_DETACH

BPF_PROG_GET_FD_BY_ID

BPF_PROG_GET_NEXT_ID

BPF_PROG_LOAD

BPF_PROG_QUERY

BPF_PROG_TEST_RUN

BPF_PROG_TYPE_CGROUP_DEVICE

BPF_PROG_TYPE_CGROUP_SKB

BPF_PROG_TYPE_CGROUP_SOCK

BPF_PROG_TYPE_CGROUP_SOCK_ADDR

BPF_PROG_TYPE_FLOW_DISSECTOR

BPF_PROG_TYPE_KPROBE

BPF_PROG_TYPE_LIRC_MODE2

BPF_PROG_TYPE_LWT_IN

BPF_PROG_TYPE_LWT_OUT

BPF_PROG_TYPE_LWT_SEG6LOCAL

BPF_PROG_TYPE_LWT_XMIT

BPF_PROG_TYPE_PERF_EVENT

BPF_PROG_TYPE_RAW_TRACEPOINT

BPF_PROG_TYPE_SCHED_ACT

BPF_PROG_TYPE_SCHED_CLS

BPF_PROG_TYPE_SK_MSG

BPF_PROG_TYPE_SK_REUSEPORT

BPF_PROG_TYPE_SK_SKB

BPF_PROG_TYPE_SOCKET_FILTER

BPF_PROG_TYPE_SOCK_OPS

BPF_PROG_TYPE_TRACEPOINT

BPF_PROG_TYPE_UNSPEC

Program types of bpf.

BPF_PROG_TYPE_XDP

BPF_PSEUDO_CALL

when bpf_call->src_reg == BPF_PSEUDO_CALL, bpf_call->imm == pc-relative offset to another bpf function

BPF_PSEUDO_MAP_FD

when bpf_ldimm64->src_reg == BPF_PSEUDO_MAP_FD, bpf_ldimm64->imm == fd

BPF_RAW_TRACEPOINT_OPEN

BPF_REDIRECT

BPF_REG_0

Register numbers

BPF_REG_1

BPF_REG_2

BPF_REG_3

BPF_REG_4

BPF_REG_5

BPF_REG_6

BPF_REG_7

BPF_REG_8

BPF_REG_9

BPF_REG_10

BPF_SK_MSG_VERDICT

BPF_SK_SKB_STREAM_PARSER

BPF_SK_SKB_STREAM_VERDICT

BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB

Calls BPF program when an active connection is established

BPF_SOCK_OPS_ALL_CB_FLAGS

Mask of all currently supported cb flags

BPF_SOCK_OPS_BASE_RTT

Get base RTT.

BPF_SOCK_OPS_NEEDS_ECN

If connection’s congestion control needs ECN

BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB

Calls BPF program when a passive connection is established

BPF_SOCK_OPS_RETRANS_CB

Called when skb is retransmitted.

BPF_SOCK_OPS_RETRANS_CB_FLAG

BPF_SOCK_OPS_RTO_CB

Called when an RTO has triggered.

BPF_SOCK_OPS_RTO_CB_FLAG

Definitions for bpf_sock_ops_cb_flags

BPF_SOCK_OPS_RWND_INIT

Should return initial advertized window (in packets) or -1 if default value should be used

BPF_SOCK_OPS_STATE_CB

Called when TCP changes state.

BPF_SOCK_OPS_STATE_CB_FLAG

BPF_SOCK_OPS_TCP_CONNECT_CB

Calls BPF program right before an active connection is initialized

BPF_SOCK_OPS_TCP_LISTEN_CB

Called on listen(2), right after socket transition to LISTEN state.

BPF_SOCK_OPS_TIMEOUT_INIT

Should return SYN-RTO value to use or -1 if default value should be used

BPF_SOCK_OPS_VOID

List of known BPF sock_ops operators. New entries can only be added at the end

BPF_STACK_BUILD_ID_EMPTY

user space need an empty entry to identify end of a trace

BPF_STACK_BUILD_ID_IP

couldn’t get build_id, fallback to ip

BPF_STACK_BUILD_ID_VALID

with valid build_id and offset

BPF_TAG_SIZE

BPF_TASK_FD_QUERY

BPF_TCP_CLOSE

BPF_TCP_CLOSE_WAIT

BPF_TCP_CLOSING

Now a valid state

BPF_TCP_ESTABLISHED

List of TCP states.

BPF_TCP_FIN_WAIT1

BPF_TCP_FIN_WAIT2

BPF_TCP_LAST_ACK

BPF_TCP_LISTEN

BPF_TCP_MAX_STATES

Leave at the end!

BPF_TCP_NEW_SYN_RECV

BPF_TCP_SYN_RECV

BPF_TCP_SYN_SENT

BPF_TCP_TIME_WAIT

BPF_TO_BE

convert to big-endian

BPF_TO_LE

convert to little-endian

BPF_XADD

exclusive add

BRKINT

Signal interrupt on break

BS0

BS1

BSDLY

BUS_ADRALN

SIGBUS si_codes invalid address alignment

BUS_ADRERR

non-existent physical address

BUS_ISA_MEM_BASE

/proc/sys/bus/isa

BUS_ISA_PORT_BASE

BUS_ISA_PORT_SHIFT

BUS_MCEERR_AO

hardware memory error detected in process but not consumed: action optional

BUS_MCEERR_AR

hardware memory error consumed on a machine check: action required

BUS_OBJERR

object specific hardware error

Blktrace_running

Blktrace_setup

Blktrace_stopped

CAP_AUDIT_CONTROL

Allow configuration of audit via unicast netlink socket.

CAP_AUDIT_READ

Allow reading the audit log via multicast netlink socket.

CAP_AUDIT_WRITE

Allow writing the audit log via unicast netlink socket.

CAP_BLOCK_SUSPEND

Allow preventing system suspends.

CAP_CHOWN

POSIX-draft defined capabilities. In a system with the _POSIX_CHOWN_RESTRICTED option defined, this overrides the restriction of changing file ownership and group ownership.

CAP_DAC_OVERRIDE

Override all DAC access, including ACL execute access if _POSIX_ACL is defined. Excluding DAC access covered by CAP_LINUX_IMMUTABLE.

CAP_DAC_READ_SEARCH

Overrides all DAC restrictions regarding read and search on files and directories, including ACL restrictions if _POSIX_ACL is defined. Excluding DAC access covered by CAP_LINUX_IMMUTABLE.

CAP_FOWNER

Overrides all restrictions about allowed operations on files, where file owner ID must be equal to the user ID, except where CAP_FSETID is applicable. It doesn’t override MAC and DAC restrictions.

CAP_FSETID

Overrides the following restrictions that the effective user ID shall match the file owner ID when setting the S_ISUID and S_ISGID bits on that file.

CAP_IPC_LOCK

Allow locking of shared memory segments Allow mlock and mlockall (which doesn’t really have anything to do with IPC)

CAP_IPC_OWNER

Override IPC ownership checks

CAP_KILL

Overrides the restriction that the real or effective user ID of a process sending a signal must match the real or effective user ID of the process receiving the signal.

CAP_LAST_CAP

CAP_LEASE

Allow taking of leases on files.

CAP_LINUX_IMMUTABLE

Allow modification of S_IMMUTABLE and S_APPEND file attributes

CAP_MAC_ADMIN

Allow MAC configuration or state changes.

CAP_MAC_OVERRIDE

Override MAC access.

CAP_MKNOD

Allow the privileged aspects of mknod().

CAP_NET_ADMIN

Network administration capacity.

CAP_NET_BIND_SERVICE

Allows binding to TCP/UDP sockets below 1024 Allows binding to ATM VCIs below 32

CAP_NET_BROADCAST

Allow broadcasting, listen to multicast

CAP_NET_RAW

Allow use of RAW sockets Allow use of PACKET sockets Allow binding to any address for transparent proxying (also via NET_ADMIN)

CAP_SETFCAP

CAP_SETGID

Allows setgid(2) manipulation Allows setgroups(2) Allows forged gids on socket credentials passing.

CAP_SETPCAP

Linux-specific capabilities

CAP_SETUID

Allows set*uid(2) manipulation (including fsuid). Allows forged pids on socket credentials passing.

CAP_SYSLOG

Allow configuring the kernel’s syslog (printk behaviour).

CAP_SYS_ADMIN

Administration capacity.

CAP_SYS_BOOT

Allow use of reboot()

CAP_SYS_CHROOT

Allow use of chroot()

CAP_SYS_MODULE

Insert and remove kernel modules - modify kernel without limit

CAP_SYS_NICE

Allow raising priority and setting priority on other (different UID) processes.

CAP_SYS_PACCT

Allow configuration of process accounting

CAP_SYS_PTRACE

Allow ptrace() of any process

CAP_SYS_RAWIO

Allow ioperm/iopl access Allow sending USB messages to any device via /dev/bus/usb

CAP_SYS_RESOURCE

Override resource limits. Set resource limits.

CAP_SYS_TIME

Allow manipulation of system clock.

CAP_SYS_TTY_CONFIG

Allow configuration of tty devices.

CAP_WAKE_ALARM

Allow triggering something that will wake the system.

CBAUD

c_cflag bit meaning

CBAUDEX

CGROUP_NS_INDEX

CIBAUD

input baud rate;

CLD_CONTINUED

stopped child has continued

CLD_DUMPED

child terminated abnormally

CLD_EXITED

There is an additional set of SIGTRAP si_codes used by ptrace that are of the form: ((PTRACE_EVENT_XXX << 8) | SIGTRAP) SIGCHLD si_codes child has exited

CLD_KILLED

child was killed

CLD_STOPPED

child has stopped

CLD_TRAPPED

traced child has trapped

CLOCAL

CLOCKS_MASK

CLOCKS_MONO

CLOCK_BOOTTIME

CLOCK_BOOTTIME_ALARM

CLOCK_MONOTONIC

CLOCK_MONOTONIC_COARSE

CLOCK_MONOTONIC_RAW

CLOCK_PROCESS_CPUTIME_ID

CLOCK_REALTIME

The IDs of the various system clocks (for POSIX.1b interval timers):

CLOCK_REALTIME_ALARM

CLOCK_REALTIME_COARSE

CLOCK_SGI_CYCLE

The driver implementing this got removed. The clock ID is kept as a place holder. Do not reuse!

CLOCK_TAI

CLOCK_THREAD_CPUTIME_ID

CLONE_ARGS_SIZE_VER0

sizeof first published struct

CLONE_ARGS_SIZE_VER1

sizeof second published struct

CLONE_ARGS_SIZE_VER2

sizeof third published struct

CLONE_CHILD_CLEARTID

clear the TID in the child

CLONE_CHILD_SETTID

set the TID in the child

CLONE_CLEAR_SIGHAND

Flags for the clone3() syscall. Clear any signal handler and reset to SIG_DFL.

CLONE_DETACHED

Unused, ignored

CLONE_FILES

set if open files shared between processes

CLONE_FS

set if fs info shared between processes

CLONE_INTO_CGROUP

Clone into a specific cgroup given the right permissions.

CLONE_IO

Clone io context

CLONE_NEWCGROUP

New cgroup namespace

CLONE_NEWIPC

New ipc namespace

CLONE_NEWNET

New network namespace

CLONE_NEWNS

New mount namespace group

CLONE_NEWPID

New pid namespace

CLONE_NEWTIME

cloning flags intersect with CSIGNAL so can be used with unshare and clone3() syscalls only: New time namespace

CLONE_NEWUSER

New user namespace

CLONE_NEWUTS

New utsname namespace

CLONE_PARENT

set if we want to have the same parent as the cloner

CLONE_PARENT_SETTID

set the TID in the parent

CLONE_PIDFD

set if a pidfd should be placed in parent

CLONE_PTRACE

set if we want to let tracing continue on the child too

CLONE_SETTLS

create a new TLS for the child

CLONE_SIGHAND

set if signal handlers and blocked signals shared

CLONE_SYSVSEM

share system V SEM_UNDO semantics

CLONE_THREAD

Same thread group?

CLONE_UNTRACED

set if the tracing process can’t force CLONE_PTRACE on this clone

CLONE_VFORK

set if the parent wants the child to wake it up on mm_release

CLONE_VM

set if VM shared between processes

CLOSE_RANGE_CLOEXEC

Set the FD_CLOEXEC bit instead of closing the file descriptor.

CLOSE_RANGE_UNSHARE

Unshare the file descriptor table before closing file descriptors.

CLUSTER_FLAG_FREE

This cluster is free

CLUSTER_FLAG_HUGE

This cluster is backing a transparent huge page

CLUSTER_FLAG_NEXT_NULL

This cluster has no next cluster

CMSPAR

mark or space (stick) parity

COMPACT_CLUSTER_MAX

COUNT_CONTINUED

Flag swap_map continuation for full count

CPU_SET_BYTES

CR0

CR1

CR2

CR3

CRDLY

CREAD

CRTSCTS

flow control

CS

CS5

CS6

CS7

CS8

CSIGNAL

cloning flags: signal mask to be sent at exit

CSIZE

CSTOPB

CTL_ABI

Binary emulation

CTL_ARLAN

arlan wireless driver

CTL_BUS

Busses

CTL_BUS_ISA

CTL_BUS names:

CTL_CPU

CPU stuff (speed scaling, etc)

CTL_DEBUG

Debugging

CTL_DEV

Devices

CTL_FRV

frv specific sysctls

CTL_FS

Filesystems

CTL_KERN

Top-level names:

CTL_MAXNAME

how many path components do we allow in a call to sysctl In other words, what is the largest acceptable value for the nlen member of a struct sysctl_args_t to have?

CTL_NET

Networking

CTL_PM

frv power management

CTL_PROC

removal breaks strace(1) compilation

CTL_S390DBF

s390 debug

CTL_SUNRPC

sunrpc debug

CTL_VM

VM management

DEV_CDROM

CTL_DEV names:

DEV_CDROM_AUTOCLOSE

DEV_CDROM_AUTOEJECT

DEV_CDROM_CHECK_MEDIA

DEV_CDROM_DEBUG

DEV_CDROM_INFO

/proc/sys/dev/cdrom

DEV_CDROM_LOCK

DEV_HWMON

DEV_IPMI

DEV_IPMI_POWEROFF_POWERCYCLE

/proc/sys/dev/ipmi

DEV_MAC_HID

DEV_MAC_HID_ADB_MOUSE_SENDS_KEYCODES

DEV_MAC_HID_KEYBOARD_LOCK_KEYCODES

DEV_MAC_HID_KEYBOARD_SENDS_LINUX_KEYCODES

/proc/sys/dev/mac_hid

DEV_MAC_HID_MOUSE_BUTTON2_KEYCODE

DEV_MAC_HID_MOUSE_BUTTON3_KEYCODE

DEV_MAC_HID_MOUSE_BUTTON_EMULATION

DEV_PARPORT

DEV_PARPORT_AUTOPROBE

DEV_PARPORT_BASE_ADDR

DEV_PARPORT_DEFAULT

/proc/sys/dev/parport

DEV_PARPORT_DEFAULT_SPINTIME

DEV_PARPORT_DEFAULT_TIMESLICE

/proc/sys/dev/parport/default

DEV_PARPORT_DEVICES

DEV_PARPORT_DEVICES_ACTIVE

/proc/sys/dev/parport/parport n/devices/

DEV_PARPORT_DEVICE_TIMESLICE

/proc/sys/dev/parport/parport n /devices/device n

DEV_PARPORT_DMA

DEV_PARPORT_IRQ

DEV_PARPORT_MODES

DEV_PARPORT_SPINTIME

/proc/sys/dev/parport/parport n

DEV_RAID

DEV_RAID_SPEED_LIMIT_MAX

DEV_RAID_SPEED_LIMIT_MIN

/proc/sys/dev/raid

DEV_SCSI

DEV_SCSI_LOGGING_LEVEL

/proc/sys/dev/scsi

DIPC

Used by the DIPC package, try and avoid reusing it

DN_ACCESS

Types of directory notifications that may be requested. File accessed

DN_ATTRIB

File changed attibutes

DN_CREATE

File created

DN_DELETE

File removed

DN_MODIFY

File modified

DN_MULTISHOT

Don’t remove notifier

DN_RENAME

File renamed

DQF_PRIVATE

Kernel internal flags invisible to userspace

DQF_ROOT_SQUASH

Root squash enabled (for v1 quota format)

DQF_ROOT_SQUASH_B

DQF_SYS_FILE

Quota stored in a system file

DQF_SYS_FILE_B

DT_BLK

DT_CHR

DT_DIR

DT_FIFO

DT_LNK

DT_MAX

16

DT_REG

DT_SOCK

DT_UNKNOWN

these are defined by POSIX and also present in glibc’s dirent.h

DT_WHT

ECHO

ECHOCTL

ECHOE

ECHOK

ECHOKE

ECHONL

ECHOPRT

EFD_CLOEXEC

EFD_NONBLOCK

EFD_SEMAPHORE

EFLAGS

EMT_TAGOVF

SIGEMT si_codes tag overflow

EPOLLERR

EPOLLET

Set the Edge Triggered behaviour for the target file descriptor

EPOLLEXCLUSIVE

Set exclusive wakeup mode for the target file descriptor

EPOLLHUP

EPOLLIN

Epoll event masks

EPOLLMSG

EPOLLNVAL

EPOLLONESHOT

Set the One Shot behaviour for the target file descriptor

EPOLLOUT

EPOLLPRI

EPOLLRDBAND

EPOLLRDHUP

EPOLLRDNORM

EPOLLWAKEUP

Request the handling of system wakeup events so as to prevent system suspends from happening while those events are being processed.

EPOLLWRBAND

EPOLLWRNORM

EPOLL_CLOEXEC

Flags for epoll_create1().

EPOLL_CTL_ADD

Valid opcodes to issue to sys_epoll_ctl()

EPOLL_CTL_DEL

EPOLL_CTL_MOD

EXTA

EXTB

EXTPROC

FANOTIFY_ADMIN_INIT_FLAGS

fanotify_init() flags that require CAP_SYS_ADMIN.

FANOTIFY_CLASS_BITS

FANOTIFY_DIRENT_EVENTS

Directory entry modification events - reported only to directory where entry is modified and not to a watching parent.

FANOTIFY_DIRONLY_EVENT_BITS

Events and flags relevant only for directories

FANOTIFY_ERROR_EVENTS

Events that can only be reported with data type FSNOTIFY_EVENT_ERROR

FANOTIFY_EVENTS

Events that user can request to be notified on

FANOTIFY_EVENT_FLAGS

Extra flags that may be reported with event or control handling of events

FANOTIFY_FD_EVENTS

Events that can be reported with event->fd

FANOTIFY_FID_BITS

FANOTIFY_INFO_MODES

FANOTIFY_INIT_FLAGS

FANOTIFY_INODE_EVENTS

Events that can only be reported with data type FSNOTIFY_EVENT_INODE

FANOTIFY_INTERNAL_GROUP_FLAGS

FANOTIFY_MARK_CMD_BITS

FANOTIFY_MARK_FLAGS

FANOTIFY_MARK_IGNORE_BITS

FANOTIFY_MARK_TYPE_BITS

FANOTIFY_METADATA_VERSION

FANOTIFY_OUTGOING_EVENTS

Events that may be reported to user

FANOTIFY_PATH_EVENTS

Events that can be reported with data type FSNOTIFY_EVENT_PATH. Note that FAN_MODIFY can also be reported with data type FSNOTIFY_EVENT_INODE.

FANOTIFY_PERM_CLASSES

Flags allowed to be passed from/to userspace.

FANOTIFY_PERM_EVENTS

Events that require a permission response from user

FANOTIFY_RESPONSE_ACCESS

These masks check for invalid bits in permission responses.

FANOTIFY_RESPONSE_FLAGS

FANOTIFY_RESPONSE_VALID_MASK

FANOTIFY_UNPRIV

Internal group flags

FANOTIFY_USER_INIT_FLAGS

fanotify_init() flags that are allowed for user without CAP_SYS_ADMIN.

FAN_ACCESS

the following events that user-space can register for File was accessed

FAN_ACCESS_PERM

File accessed in perm check

FAN_ALLOW

Legit userspace responses to a _PERM event

FAN_ALL_CLASS_BITS

Deprecated - do not use this in programs and do not add new flags here!

FAN_ALL_EVENTS

Deprecated - do not use this in programs and do not add new flags here!

FAN_ALL_INIT_FLAGS

Deprecated - do not use this in programs and do not add new flags here!

FAN_ALL_MARK_FLAGS

Deprecated - do not use this in programs and do not add new flags here!

FAN_ALL_OUTGOING_EVENTS

Deprecated - do not use this in programs and do not add new flags here!

FAN_ALL_PERM_EVENTS

All events which require a permission response from userspace Deprecated - do not use this in programs and do not add new flags here!

FAN_ATTRIB

Metadata changed

FAN_AUDIT

Bitmask to create audit record for result

FAN_CLASS_CONTENT

FAN_CLASS_NOTIF

These are NOT bitwise flags. Both bits are used together.

FAN_CLASS_PRE_CONTENT

FAN_CLOEXEC

flags used for fanotify_init()

FAN_CLOSE

helper events close

FAN_CLOSE_NOWRITE

Unwritable file closed

FAN_CLOSE_WRITE

Writable file closed

FAN_CREATE

Subfile was created

FAN_DELETE

Subfile was deleted

FAN_DELETE_SELF

Self was deleted

FAN_DENY

FAN_ENABLE_AUDIT

FAN_EPIDFD

FAN_EVENT_INFO_TYPE_DFID

FAN_EVENT_INFO_TYPE_DFID_NAME

FAN_EVENT_INFO_TYPE_ERROR

FAN_EVENT_INFO_TYPE_FID

FAN_EVENT_INFO_TYPE_NEW_DFID_NAME

Reserved for FAN_EVENT_INFO_TYPE_OLD_DFID 11

FAN_EVENT_INFO_TYPE_OLD_DFID_NAME

Special info types for FAN_RENAME

FAN_EVENT_INFO_TYPE_PIDFD

FAN_EVENT_ON_CHILD

Interested in child events

FAN_FS_ERROR

Filesystem error

FAN_INFO

Bitmask to indicate additional information

FAN_MARK_ADD

flags used for fanotify_modify_mark()

FAN_MARK_DONT_FOLLOW

FAN_MARK_EVICTABLE

FAN_MARK_FILESYSTEM is 0x0000_0100

FAN_MARK_FILESYSTEM

FAN_MARK_FLUSH

FAN_MARK_IGNORE

This bit is mutually exclusive with FAN_MARK_IGNORED_MASK bit

FAN_MARK_IGNORED_MASK

FAN_MARK_MOUNT is 0x0000_0010

FAN_MARK_IGNORED_SURV_MODIFY

FAN_MARK_IGNORE_SURV

Convenience macro - FAN_MARK_IGNORE requires FAN_MARK_IGNORED_SURV_MODIFY for non-inode mark types.

FAN_MARK_INODE

These are NOT bitwise flags. Both bits can be used togther.

FAN_MARK_MOUNT

FAN_MARK_ONLYDIR

FAN_MARK_REMOVE

FAN_MODIFY

File was modified

FAN_MOVE

moves

FAN_MOVED_FROM

File was moved from X

FAN_MOVED_TO

File was moved to Y

FAN_MOVE_SELF

Self was moved

FAN_NOFD

No fd set in event

FAN_NONBLOCK

FAN_NOPIDFD

FAN_ONDIR

Event occurred against dir

FAN_OPEN

File was opened

FAN_OPEN_EXEC

File was opened for exec

FAN_OPEN_EXEC_PERM

File open/exec in perm check

FAN_OPEN_PERM

File open in perm check

FAN_Q_OVERFLOW

Event queued overflowed

FAN_RENAME

File was renamed

FAN_REPORT_DFID_NAME

Convenience macro - FAN_REPORT_NAME requires FAN_REPORT_DIR_FID

FAN_REPORT_DFID_NAME_TARGET

Convenience macro - FAN_REPORT_TARGET_FID requires all other FID flags

FAN_REPORT_DIR_FID

Report unique directory id

FAN_REPORT_FID

Report unique file id

FAN_REPORT_NAME

Report events with name

FAN_REPORT_PIDFD

Flags to determine fanotify event format Report pidfd for event->pid

FAN_REPORT_TARGET_FID

Report dirent target id

FAN_REPORT_TID

event->pid is thread id

FAN_RESPONSE_INFO_AUDIT_RULE

FAN_RESPONSE_INFO_NONE

Reserved for FAN_EVENT_INFO_TYPE_NEW_DFID 13

FAN_UNLIMITED_MARKS

FAN_UNLIMITED_QUEUE

FASYNC

fcntl, for BSD compatibility

FDPIC_FUNCPTRS

userspace function ptrs point to descriptors (signal handling)

FD_CLOEXEC

For F_[GET|SET]FL

FD_SETSIZE

This allows for 1024 file descriptors:

FF0

FF1

FFDLY

FIBMAP

bmap access

FICLONE

FICLONERANGE

FIDEDUPERANGE

FIEMAP_EXTENT_DATA_ENCRYPTED

Data is encrypted by fs.

FIEMAP_EXTENT_DATA_INLINE

Data mixed with metadata.

FIEMAP_EXTENT_DATA_TAIL

Multiple files in block.

FIEMAP_EXTENT_DELALLOC

Location still pending.

FIEMAP_EXTENT_ENCODED

Data can not be read while fs is unmounted

FIEMAP_EXTENT_LAST

Last extent in file.

FIEMAP_EXTENT_MERGED

File does not natively support extents.

FIEMAP_EXTENT_NOT_ALIGNED

Extent offsets may not be block aligned.

FIEMAP_EXTENT_SHARED

Space shared with other files.

FIEMAP_EXTENT_UNKNOWN

Data location unknown.

FIEMAP_EXTENT_UNWRITTEN

Space allocated, but no data (i.e. zero).

FIEMAP_FLAGS_COMPAT

FIEMAP_FLAG_CACHE

request caching of the extents

FIEMAP_FLAG_SYNC

sync file data before map

FIEMAP_FLAG_XATTR

map extended attribute tree

FIEMAP_MAX_OFFSET

FIFREEZE

Freeze

FIGETBSZ

get the block size used for bmap

FILE_DEDUPE_RANGE_DIFFERS

FILE_DEDUPE_RANGE_SAME

extent-same (dedupe) ioctls; these MUST match the btrfs ioctl definitions

FIOASYNC

FIOCLEX

FIOGETOWN

FIONBIO

FIONCLEX

FIONREAD

FIOQSIZE

Some arches already define FIOQSIZE due to a historical conflict with a Hayes modem-specific ioctl value.

FIOSETOWN

Socket-level I/O control calls.

FITHAW

Thaw

FITRIM

Trim

FLUSHO

FPE_CONDTRAP

trap on condition

FPE_FLTDIV

floating point divide by zero

FPE_FLTINV

floating point invalid operation

FPE_FLTOVF

floating point overflow

FPE_FLTRES

floating point inexact result

FPE_FLTSUB

subscript out of range

FPE_FLTUND

floating point underflow

FPE_FLTUNK

undiagnosed floating-point exception

FPE_INTDIV

SIGFPE si_codes integer divide by zero

FPE_INTOVF

integer overflow

FRAME_SIZE

top of stack page

FSCONFIG_CMD_CREATE

Create new or reuse existing superblock

FSCONFIG_CMD_CREATE_EXCL

Create new superblock, fail if reusing existing superblock

FSCONFIG_CMD_RECONFIGURE

Invoke superblock reconfiguration

FSCONFIG_SET_BINARY

Set parameter, supplying a binary blob value

FSCONFIG_SET_FD

Set parameter, supplying an object by fd

FSCONFIG_SET_FLAG

Set parameter, supplying no value

FSCONFIG_SET_PATH

Set parameter, supplying an object by path

FSCONFIG_SET_PATH_EMPTY

Set parameter, supplying an object by (empty) path

FSCONFIG_SET_STRING

Set parameter, supplying a string value

FSEC_PER_SEC

FSLABEL_MAX

Max chars for the interface; each fs may differ

FSMOUNT_CLOEXEC

fsmount() flags.

FSOPEN_CLOEXEC

fsopen() flags.

FSPICK_CLOEXEC

fspick() flags.

FSPICK_EMPTY_PATH

FSPICK_NO_AUTOMOUNT

FSPICK_SYMLINK_NOFOLLOW

FS_AIO_MAX_NR

system-wide maximum number of aio requests

FS_AIO_NR

current system-wide number of aio requests

FS_APPEND_FL

writes to file may only append

FS_BTREE_FL

btree format dir

FS_COMPRBLK_FL

One or more compressed clusters

FS_COMPR_FL

Compress file

FS_DENTRY

FS_DIRSYNC_FL

dirsync behaviour (directories only)

FS_DIRTY_FL

Reserved for compression usage…

FS_DIR_NOTIFY

int: directory notification enabled

FS_DQSTATS

disc quota usage statistics and control

FS_DQ_ALLOCATED

FS_DQ_CACHE_HITS

FS_DQ_DROPS

FS_DQ_FREE

FS_DQ_LOOKUPS

/proc/sys/fs/quota/

FS_DQ_READS

FS_DQ_SYNCS

FS_DQ_WARNINGS

FS_DQ_WRITES

FS_EA_INODE_FL

Inode used for large EA

FS_ENCRYPTION_MODE_ADIANTUM

FS_ENCRYPTION_MODE_AES_128_CBC

FS_ENCRYPTION_MODE_AES_128_CTS

FS_ENCRYPTION_MODE_AES_256_CBC

FS_ENCRYPTION_MODE_AES_256_CTS

FS_ENCRYPTION_MODE_AES_256_GCM

FS_ENCRYPTION_MODE_AES_256_XTS

FS_ENCRYPTION_MODE_INVALID

Encryption algorithms

FS_ENCRYPTION_MODE_SPECK128_256_CTS

Removed, do not use.

FS_ENCRYPTION_MODE_SPECK128_256_XTS

Removed, do not use.

FS_ENCRYPT_FL

End compression flags — maybe not all used Encrypted file

FS_EOFBLOCKS_FL

Reserved for ext4

FS_EXTENT_FL

Extents

FS_FL_USER_MODIFIABLE

User modifiable flags

FS_FL_USER_VISIBLE

User visible flags

FS_HUGE_FILE_FL

Reserved for ext4

FS_IMAGIC_FL

AFS directory

FS_IMMUTABLE_FL

Immutable file

FS_INDEX_FL

hash-indexed directory

FS_INLINE_DATA_FL

Reserved for ext4

FS_INOTIFY

inotify submenu

FS_IOC32_GETFLAGS

FS_IOC32_GETVERSION

FS_IOC32_SETFLAGS

FS_IOC32_SETVERSION

FS_IOC_FIEMAP

FS_IOC_FSGETXATTR

FS_IOC_FSSETXATTR

FS_IOC_GETFLAGS

FS_IOC_GETFSLABEL

FS_IOC_GETVERSION

FS_IOC_SETFLAGS

FS_IOC_SETFSLABEL

FS_IOC_SETVERSION

FS_JOURNAL_DATA_FL

Reserved for ext3

FS_KEY_DESCRIPTOR_SIZE

File system encryption support Policy provided via an ioctl on the topmost directory

FS_KEY_DESC_PREFIX

Parameters for passing an encryption key into the kernel keyring

FS_KEY_DESC_PREFIX_SIZE

FS_LEASES

int: leases enabled

FS_LEASE_TIME

int: maximum time to wait for a lease break

FS_MAXDQUOT

int:maximum number of dquots that can be allocated

FS_MAXFILE

int:maximum number of filedescriptors that can be allocated

FS_MAXINODE

int:maximum number of inodes that can be allocated

FS_MAXSUPER

int:maximum number of super_blocks that can be allocated

FS_MAX_KEY_SIZE

Structure that userspace passes to the kernel keyring

FS_NOATIME_FL

do not update atime

FS_NOCOMP_FL

Don’t compress

FS_NOCOW_FL

Do not cow file

FS_NODUMP_FL

do not dump file

FS_NOTAIL_FL

file tail should not be merged

FS_NRDQUOT

int:current number of allocated dquots

FS_NRFILE

int:current number of allocated filedescriptors

FS_NRINODE

CTL_FS names:

FS_NRSUPER

int:current number of allocated super_blocks

FS_OCFS2

ocfs2

FS_OVERFLOWGID

int: overflow GID

FS_OVERFLOWUID

int: overflow UID

FS_POLICY_FLAGS_PAD_4

FS_POLICY_FLAGS_PAD_8

FS_POLICY_FLAGS_PAD_16

FS_POLICY_FLAGS_PAD_32

FS_POLICY_FLAGS_PAD_MASK

FS_POLICY_FLAGS_VALID

use master key directly

FS_PROJINHERIT_FL

Create with parents projid

FS_RESERVED_FL

reserved for ext2 lib

FS_SECRM_FL

Inode flags (FS_IOC_GETFLAGS / FS_IOC_SETFLAGS)

FS_STATINODE

FS_SYNC_FL

Synchronous updates

FS_TOPDIR_FL

Top of directory hierarchies

FS_UNRM_FL

Undelete

FS_XFLAG_APPEND

all writes append

FS_XFLAG_COWEXTSIZE

CoW extent size allocator hint

FS_XFLAG_DAX

use DAX for IO

FS_XFLAG_EXTSIZE

extent size allocator hint

FS_XFLAG_EXTSZINHERIT

inherit inode extent size

FS_XFLAG_FILESTREAM

use filestream allocator

FS_XFLAG_HASATTR

no DIFLAG for this

FS_XFLAG_IMMUTABLE

file cannot be modified

FS_XFLAG_NOATIME

do not update access time

FS_XFLAG_NODEFRAG

do not defragment

FS_XFLAG_NODUMP

do not include in backups

FS_XFLAG_NOSYMLINKS

disallow symlink creation

FS_XFLAG_PREALLOC

preallocated file extents

FS_XFLAG_PROJINHERIT

create with parents projid

FS_XFLAG_REALTIME

Flags for the fsx_xflags field data in realtime volume

FS_XFLAG_RTINHERIT

create with rt bit set

FS_XFLAG_SYNC

all writes synchronous

FS_XFS

struct: control xfs parameters

FT_BLKDEV

FT_CHRDEV

FT_DIR

FT_FIFO

FT_MAX

FT_REG_FILE

FT_SOCK

FT_SYMLINK

FT_UNKNOWN

fs on-disk file types.

FUTEX_32

Flags to specify the bit length of the futex word for futex2 syscalls. Currently, only 32 is supported.

FUTEX_BITSET_MATCH_ANY

bitset with all bits set for the FUTEX_xxx_BITSET OPs to request a match of any bit.

FUTEX_CLOCK_REALTIME

FUTEX_CMD_MASK

FUTEX_CMP_REQUEUE

FUTEX_CMP_REQUEUE_PI

FUTEX_CMP_REQUEUE_PI_PRIVATE

FUTEX_CMP_REQUEUE_PRIVATE

FUTEX_FD

FUTEX_LOCK_PI

FUTEX_LOCK_PI_PRIVATE

FUTEX_OP_ADD

*(int *)UADDR2 += OPARG;

FUTEX_OP_ANDN

*(int *)UADDR2 &= ~OPARG;

FUTEX_OP_CMP_EQ

if (oldval == CMPARG) wake

FUTEX_OP_CMP_GE

if (oldval >= CMPARG) wake

FUTEX_OP_CMP_GT

if (oldval > CMPARG) wake

FUTEX_OP_CMP_LE

if (oldval <= CMPARG) wake

FUTEX_OP_CMP_LT

if (oldval < CMPARG) wake

FUTEX_OP_CMP_NE

if (oldval != CMPARG) wake

FUTEX_OP_OPARG_SHIFT

Use (1 << OPARG) instead of OPARG.

FUTEX_OP_OR

*(int *)UADDR2 |= OPARG;

FUTEX_OP_SET

*(int *)UADDR2 = OPARG;

FUTEX_OP_XOR

*(int *)UADDR2 ^= OPARG;

FUTEX_OWNER_DIED

The kernel signals via this bit that a thread holding a futex has exited without unlocking the futex.

FUTEX_PRIVATE_FLAG

FUTEX_REQUEUE

FUTEX_REQUEUE_PRIVATE

FUTEX_TID_MASK

The rest of the robust-futex field is for the TID:

FUTEX_TRYLOCK_PI

FUTEX_TRYLOCK_PI_PRIVATE

FUTEX_UNLOCK_PI

FUTEX_UNLOCK_PI_PRIVATE

FUTEX_WAIT

Second argument to futex syscall

FUTEX_WAITERS

Are there any waiters for this robust futex:

FUTEX_WAITV_MAX

Max numbers of elements in a futex_waitv_t array.

FUTEX_WAIT_BITSET

FUTEX_WAIT_BITSET_PRIVATE

FUTEX_WAIT_PRIVATE

FUTEX_WAIT_REQUEUE_PI

FUTEX_WAIT_REQUEUE_PI_PRIVATE

FUTEX_WAKE

FUTEX_WAKE_BITSET

FUTEX_WAKE_BITSET_PRIVATE

FUTEX_WAKE_OP

FUTEX_WAKE_OP_PRIVATE

FUTEX_WAKE_PRIVATE

F_ADD_SEALS

Set/Get seals

F_CANCELLK

Cancel a blocking posix lock; internal use only until we expose an asynchronous lock api to userspace:

F_DUPFD

F_DUPFD_CLOEXEC

Create a file descriptor with FD_CLOEXEC set.

F_EXLCK

for old implementation of bsd flock()

F_GETFD

F_GETFL

F_GETLEASE

F_GETLK

F_GETLK64

using ‘struct flock64’

F_GETOWN

F_GETOWNER_UIDS

F_GETOWN_EX

F_GETPIPE_SZ

F_GETSIG

F_GET_FILE_RW_HINT

F_GET_RW_HINT

Set/Get write life time hints. {GET,SET}_RW_HINT operate on the underlying inode, while {GET,SET}_FILE_RW_HINT operate only on the specific file.

F_GET_SEALS

F_LINUX_SPECIFIC_BASE

F_NOTIFY

Request nofications on a directory. See below for events that may be notified.

F_OFD_GETLK

Open File Description Locks

F_OFD_SETLK

F_OFD_SETLKW

F_OK

Check for file existence.

F_OWNER_PGRP

F_OWNER_PID

F_OWNER_TID

F_RDLCK

for posix fcntl() and lockf()

F_SEAL_FUTURE_WRITE

prevent future writes while mapped

F_SEAL_GROW

prevent file from growing

F_SEAL_SEAL

Types of seals prevent further seals from being set

F_SEAL_SHRINK

prevent file from shrinking

F_SEAL_WRITE

prevent writes

F_SETFD

F_SETFL

F_SETLEASE

F_SETLK

F_SETLK64

F_SETLKW

F_SETLKW64

F_SETOWN

F_SETOWN_EX

F_SETPIPE_SZ

Set and get of pipe page size array

F_SETSIG

F_SET_FILE_RW_HINT

F_SET_RW_HINT

F_SHLCK

F_UNLCK

F_WRLCK

GETALL

get all semval’s

GETNCNT

get semncnt

GETPID

semctl Command Definitions. get sempid

GETVAL

get semval

GETZCNT

get semzcnt

GRPQUOTA

element used for group quotas

HUGETLB_FLAG_ENCODE_1GB

HUGETLB_FLAG_ENCODE_1MB

HUGETLB_FLAG_ENCODE_2GB

HUGETLB_FLAG_ENCODE_2MB

HUGETLB_FLAG_ENCODE_8MB

HUGETLB_FLAG_ENCODE_16GB

HUGETLB_FLAG_ENCODE_16MB

HUGETLB_FLAG_ENCODE_32MB

HUGETLB_FLAG_ENCODE_64KB

HUGETLB_FLAG_ENCODE_256MB

HUGETLB_FLAG_ENCODE_512KB

HUGETLB_FLAG_ENCODE_512MB

HUGETLB_FLAG_ENCODE_MASK

HUGETLB_FLAG_ENCODE_SHIFT

HUPCL

IBSHIFT

Shift from CBAUD to CIBAUD

ICANON

ICRNL

Map CR to NL on input

IEXTEN

IGNBRK

c_iflag bits Ignore break condition

IGNCR

Ignore CR

IGNPAR

Ignore characters with parity errors

IIF_ALL

IIF_BGRACE

Structure used for setting quota information about file via quotactl Following flags are used to specify which fields are valid

IIF_FLAGS

IIF_IGRACE

ILL_BADIADDR

unimplemented instruction address

ILL_BADSTK

internal stack error

ILL_COPROC

coprocessor error

ILL_ILLADR

illegal addressing mode

ILL_ILLOPC

SIGILL si_codes illegal opcode

ILL_ILLOPN

illegal operand

ILL_ILLTRP

illegal trap

ILL_PRVOPC

privileged opcode

ILL_PRVREG

privileged register

IMAXBEL

INADDR_ALLHOSTS_GROUP

224.0.0.1

INADDR_ALLRTRS_GROUP

224.0.0.2

INADDR_ALLSNOOPERS_GROUP

224.0.0.106

INADDR_ANY

Address to accept any incoming messages.

INADDR_BROADCAST

Address to send to all hosts.

INADDR_LOOPBACK

Address to loopback in software to local host. 127.0.0.1

INADDR_MAX_LOCAL_GROUP

224.0.0.255

INADDR_NONE

Address indicating an error return.

INADDR_UNSPEC_GROUP

Defines for Multicast INADDR 224.0.0.0

INITQFNAMES

INLCR

Map NL to CR on input

INOTIFY_MAX_QUEUED_EVENTS

INOTIFY_MAX_USER_INSTANCES

/proc/sys/fs/inotify/ max instances per user

INOTIFY_MAX_USER_WATCHES

max watches per user

INPCK

Enable input parity check

INR_OPEN_CUR

Fixed constants first: Initial setting for nfile rlimits

INR_OPEN_MAX

Hard limit for nfile rlimits

IN_ACCESS

the following are legal, implemented events that user-space can watch for File was accessed

IN_ALL_EVENTS

All of the events - we build the list by hand so that we can add flags in the future and not break backward compatibility.

IN_ATTRIB

Metadata changed

IN_CLASSA_HOST

IN_CLASSA_MAX

IN_CLASSA_NET

IN_CLASSA_NSHIFT

IN_CLASSB_HOST

IN_CLASSB_MAX

IN_CLASSB_NET

IN_CLASSB_NSHIFT

IN_CLASSC_HOST

IN_CLASSC_NET

IN_CLASSC_NSHIFT

IN_CLASSE_NET

IN_CLASSE_NSHIFT

IN_CLOEXEC

Flags for sys_inotify_init1.

IN_CLOSE

close

IN_CLOSE_NOWRITE

Unwrittable file closed

IN_CLOSE_WRITE

Writtable file was closed

IN_CREATE

Subfile was created

IN_DELETE

Subfile was deleted

IN_DELETE_SELF

Self was deleted

IN_DONT_FOLLOW

don’t follow a sym link

IN_EXCL_UNLINK

exclude events on unlinked objects

IN_IGNORED

File was ignored

IN_ISDIR

event occurred against dir

IN_LOOPBACKNET

Network number for local host loopback.

IN_MASK_ADD

add to the mask of an already existing watch

IN_MASK_CREATE

only create watches

IN_MODIFY

File was modified

IN_MOVE

moves

IN_MOVED_FROM

File was moved from X

IN_MOVED_TO

File was moved to Y

IN_MOVE_SELF

Self was moved

IN_MULTICAST_NET

IN_NONBLOCK

IN_ONESHOT

only send event once

IN_ONLYDIR

special flags only watch the path if it is a directory

IN_OPEN

File was opened

IN_Q_OVERFLOW

Event queued overflowed

IN_UNMOUNT

the following are legal events. they are sent as needed to any watch Backing fs was unmounted

IOCB_CMD_FDSYNC

IOCB_CMD_FSYNC

IOCB_CMD_NOOP

IOCB_CMD_POLL

IOCB_CMD_PREAD

IOCB_CMD_PREADV

IOCB_CMD_PWRITE

IOCB_CMD_PWRITEV

IOCB_FLAG_IOPRIO

IOCB_FLAG_RESFD

Valid flags for the aio_flags member of the struct iocb.

IOCSIZE_MASK

IOCSIZE_SHIFT

IOC_DIRBITS

IOC_DIRMASK

IOC_DIRSHIFT

IOC_IN

…and for the drivers/sound files…

IOC_INOUT

IOC_NONE

Direction bits, which any architecture can choose to override before including this file.

IOC_NRBITS

IOC_NRMASK

IOC_NRSHIFT

IOC_OUT

IOC_READ

IOC_SIZEBITS

Let any architecture override either of the following before including this file.

IOC_SIZEMASK

IOC_SIZESHIFT

IOC_TYPEBITS

IOC_TYPEMASK

IOC_TYPESHIFT

IOC_WRITE

IOPRIO_BE_NR

8 best effort priority levels are supported

IOPRIO_CLASS_BE

IOPRIO_CLASS_IDLE

IOPRIO_CLASS_NONE

These are the io priority groups as implemented by CFQ.

IOPRIO_CLASS_RT

IOPRIO_CLASS_SHIFT

Gives us 8 prio classes with 13-bits of data for each class

IOPRIO_NORM

Fallback BE priority

IOPRIO_PRIO_MASK

IOPRIO_WHO_PGRP

IOPRIO_WHO_PROCESS

IOPRIO_WHO_USER

IORING_CQE_BUFFER_SHIFT

IORING_CQE_F_BUFFER

cqe->flags

IORING_ENTER_GETEVENTS

io_uring_enter(2) flags

IORING_ENTER_SQ_WAKEUP

IORING_FEAT_CUR_PERSONALITY

IORING_FEAT_FAST_POLL

IORING_FEAT_NODROP

IORING_FEAT_RW_CUR_POS

IORING_FEAT_SINGLE_MMAP

io_uring_params->features flags

IORING_FEAT_SUBMIT_STABLE

IORING_FSYNC_DATASYNC

sqe->fsync_flags

IORING_OFF_CQ_RING

IORING_OFF_SQES

IORING_OFF_SQ_RING

Magic offsets for the application to mmap the data it needs

IORING_REGISTER_BUFFERS

io_uring_register(2) opcodes and arguments

IORING_REGISTER_EVENTFD

IORING_REGISTER_EVENTFD_ASYNC

IORING_REGISTER_FILES

IORING_REGISTER_FILES_UPDATE

IORING_REGISTER_PERSONALITY

IORING_REGISTER_PROBE

IORING_SETUP_ATTACH_WQ

attach to existing wq

IORING_SETUP_CLAMP

clamp SQ/CQ ring sizes

IORING_SETUP_CQSIZE

app defines CQ size

IORING_SETUP_IOPOLL

io_uring_setup() flags io_context is polled

IORING_SETUP_SQPOLL

SQ poll thread

IORING_SETUP_SQ_AFF

sq_thread_cpu is valid

IORING_SQ_NEED_WAKEUP

sq_ring->flags needs io_uring_enter wakeup

IORING_TIMEOUT_ABS

sqe->timeout_flags

IORING_UNREGISTER_BUFFERS

IORING_UNREGISTER_EVENTFD

IORING_UNREGISTER_FILES

IORING_UNREGISTER_PERSONALITY

IOSQE_ASYNC

always go async

IOSQE_ASYNC_BIT

IOSQE_BUFFER_SELECT

select buffer from sqe->buf_group

IOSQE_BUFFER_SELECT_BIT

IOSQE_FIXED_FILE

sqe->flags use fixed fileset

IOSQE_FIXED_FILE_BIT

IOSQE_IO_DRAIN

issue after inflight IO

IOSQE_IO_DRAIN_BIT

IOSQE_IO_HARDLINK

like LINK, but stronger

IOSQE_IO_HARDLINK_BIT

IOSQE_IO_LINK

links next sqe

IOSQE_IO_LINK_BIT

IO_URING_OP_SUPPORTED

IPC_64

IPC_CREAT

resource get request flags create if key is nonexistent

IPC_DIPC

these fields are used by the DIPC package so the kernel as standard should avoid using them if possible make it distributed

IPC_EXCL

fail if key exists

IPC_INFO

See ipcs

IPC_NOWAIT

return error on wait

IPC_NS_INDEX

IPC_OLD

Version flags for semctl, msgctl, and shmctl commands These are passed as bitflags or-ed with the actual command

IPC_OWN

this machine is the DIPC owner

IPC_PRIVATE

IPC_RMID

Control commands used with semctl, msgctl and shmctl see also specific commands in sem.h, msg.h and shm.h remove resource

IPC_SET

Set ipc_perm options

IPC_STAT

Get ipc_perm options

IPPROTO_AH

Authentication Header protocol

IPPROTO_BEETPH

IP option pseudo header for BEET

IPPROTO_COMP

Compression Header Protocol

IPPROTO_DCCP

Datagram Congestion Control Protocol

IPPROTO_DSTOPTS

IPv6 destination options

IPPROTO_EGP

Exterior Gateway Protocol

IPPROTO_ENCAP

Encapsulation Header

IPPROTO_ESP

Encapsulation Security Payload protocol

IPPROTO_FRAGMENT

IPv6 fragmentation header

IPPROTO_GRE

Cisco GRE tunnels (rfc 1701,1702)

IPPROTO_HOPOPTS

IPV6 extension headers IPv6 hop-by-hop options

IPPROTO_ICMP

Internet Control Message Protocol

IPPROTO_ICMPV6

ICMPv6

IPPROTO_IDP

XNS IDP protocol

IPPROTO_IGMP

Internet Group Management Protocol

IPPROTO_IP

INET: An implementation of the TCP/IP protocol suite for the LINUX operating system. INET is implemented using the BSD Socket interface as the means of communication with the user level.

IPPROTO_IPIP

IPIP tunnels (older KA9Q tunnels use 94)

IPPROTO_IPV6

IPv6-in-IPv4 tunnelling

IPPROTO_MAX

IPPROTO_MH

IPv6 mobility header

IPPROTO_MPLS

MPLS in IP (RFC 4023)

IPPROTO_MTP

Multicast Transport Protocol

IPPROTO_NONE

IPv6 no next header

IPPROTO_PIM

Protocol Independent Multicast

IPPROTO_PUP

PUP protocol

IPPROTO_RAW

Raw IP packets

IPPROTO_ROUTING

IPv6 routing header

IPPROTO_RSVP

RSVP Protocol

IPPROTO_SCTP

Stream Control Transport Protocol

IPPROTO_TCP

Transmission Control Protocol

IPPROTO_TP

SO Transport Protocol Class 4

IPPROTO_UDP

User Datagram Protocol

IPPROTO_UDPLITE

UDP-Lite (RFC 3828)

IPV6_2292DSTOPTS

IPV6_2292HOPLIMIT

IPV6_2292HOPOPTS

IPV6_2292PKTINFO

IPV6_2292PKTOPTIONS

IPV6_2292RTHDR

IPV6_ADDRFORM

IPV6 socket options

IPV6_ADDR_PREFERENCES

RFC5014: Source address selection

IPV6_ADD_MEMBERSHIP

IPV6_AUTHHDR

obsolete

IPV6_AUTOFLOWLABEL

IPV6_CHECKSUM

IPV6_DONTFRAG

IPV6_DROP_MEMBERSHIP

IPV6_DSTOPTS

IPV6_FLOWINFO

IPV6_FLOWINFO_FLOWLABEL

Bitmask constant declarations to help applications select out the flow label and priority fields.

IPV6_FLOWINFO_PRIORITY

IPV6_FLOWINFO_SEND

IPV6_FLOWLABEL_MGR

Flowlabel

IPV6_FL_A_GET

IPV6_FL_A_PUT

IPV6_FL_A_RENEW

IPV6_FL_F_CREATE

IPV6_FL_F_EXCL

IPV6_FL_F_REFLECT

IPV6_FL_F_REMOTE

IPV6_FL_S_ANY

IPV6_FL_S_EXCL

IPV6_FL_S_NONE

IPV6_FL_S_PROCESS

IPV6_FL_S_USER

IPV6_FREEBIND

IPV6_HDRINCL

IPV6_HOPLIMIT

IPV6_HOPOPTS

IPV6_IPSEC_POLICY

IPV6_JOIN_ANYCAST

IPV6_LEAVE_ANYCAST

IPV6_MINHOPCOUNT

RFC5082: Generalized Ttl Security Mechanism

IPV6_MTU

IPV6_MTU_DISCOVER

IPV6_MULTICAST_ALL

IPV6_MULTICAST_HOPS

IPV6_MULTICAST_IF

IPV6_MULTICAST_LOOP

IPV6_NEXTHOP

IPV6_ORIGDSTADDR

IPV6_PATHMTU

IPV6_PKTINFO

IPV6_PMTUDISC_DO

IPV6_PMTUDISC_DONT

IPV6_MTU_DISCOVER values

IPV6_PMTUDISC_INTERFACE

same as IPV6_PMTUDISC_PROBE, provided for symetry with IPv4 also see comments on IP_PMTUDISC_INTERFACE

IPV6_PMTUDISC_OMIT

weaker version of IPV6_PMTUDISC_INTERFACE, which allows packets to get fragmented if they exceed the interface mtu

IPV6_PMTUDISC_PROBE

IPV6_PMTUDISC_WANT

IPV6_PREFER_SRC_CGA

IPV6_PREFER_SRC_COA

IPV6_PREFER_SRC_HOME

IPV6_PREFER_SRC_NONCGA

IPV6_PREFER_SRC_PUBLIC

IPV6_PREFER_SRC_PUBTMP_DEFAULT

IPV6_PREFER_SRC_TMP

IPV6_PRIORITY_8

IPV6_PRIORITY_9

IPV6_PRIORITY_10

IPV6_PRIORITY_11

IPV6_PRIORITY_12

IPV6_PRIORITY_13

IPV6_PRIORITY_14

IPV6_PRIORITY_15

IPV6_PRIORITY_BULK

IPV6_PRIORITY_CONTROL

IPV6_PRIORITY_FILLER

IPV6_PRIORITY_INTERACTIVE

IPV6_PRIORITY_RESERVED1

IPV6_PRIORITY_RESERVED2

IPV6_PRIORITY_UNATTENDED

IPV6_PRIORITY_UNCHARACTERIZED

These definitions are obsolete

IPV6_RECVDSTOPTS

IPV6_RECVERR

IPV6_RECVFRAGSIZE

IPV6_RECVHOPLIMIT

IPV6_RECVHOPOPTS

IPV6_RECVORIGDSTADDR

IPV6_RECVPATHMTU

IPV6_RECVPKTINFO

Advanced API (RFC3542) (1) Note: IPV6_RECVRTHDRDSTOPTS does not exist.

IPV6_RECVRTHDR

IPV6_RECVTCLASS

Advanced API (RFC3542) (2)

IPV6_ROUTER_ALERT

IPV6_ROUTER_ALERT_ISOLATE

IPV6_RTHDR

IPV6_RTHDRDSTOPTS

IPV6_TCLASS

IPV6_TLV_CALIPSO

RFC 5570

IPV6_TLV_HAO

home address option

IPV6_TLV_JUMBO

IPV6_TLV_PAD1

IPv6 TLV options.

IPV6_TLV_PADN

IPV6_TLV_ROUTERALERT

IPV6_TRANSPARENT

IPV6_UNICAST_HOPS

IPV6_UNICAST_IF

IPV6_V6ONLY

IPV6_XFRM_POLICY

IPX_TYPE

IPX options

IP_ADD_MEMBERSHIP

IP_ADD_SOURCE_MEMBERSHIP

IP_BIND_ADDRESS_NO_PORT

IP_BLOCK_SOURCE

IP_CHECKSUM

IP_DEFAULT_MULTICAST_LOOP

IP_DEFAULT_MULTICAST_TTL

These need to appear somewhere around here

IP_DROP_MEMBERSHIP

IP_DROP_SOURCE_MEMBERSHIP

IP_FREEBIND

IP_HDRINCL

IP_IPSEC_POLICY

IP_MINTTL

IP_MSFILTER

IP_MTU

IP_MTU_DISCOVER

IP_MULTICAST_ALL

IP_MULTICAST_IF

IP_MULTICAST_LOOP

IP_MULTICAST_TTL

IP_NODEFRAG

IP_OPTIONS

IP_ORIGDSTADDR

Proxy original addresses

IP_PASSSEC

IP_PKTINFO

IP_PKTOPTIONS

IP_PMTUDISC_DO

Always DF

IP_PMTUDISC_DONT

IP_MTU_DISCOVER values Never send DF frames

IP_PMTUDISC_INTERFACE

Always use interface mtu (ignores dst pmtu) but don’t set DF flag. Also incoming ICMP frag_needed notifications will be ignored on this socket to prevent accepting spoofed ones.

IP_PMTUDISC_OMIT

IP_PMTUDISC_PROBE

Ignore dst pmtu

IP_PMTUDISC_WANT

Use per route hints

IP_RECVERR

IP_RECVFRAGSIZE

IP_RECVOPTS

IP_RECVORIGDSTADDR

IP_RECVRETOPTS

BSD compatibility

IP_RECVTOS

IP_RECVTTL

IP_RETOPTS

IP_ROUTER_ALERT

IP_TOS

IP_TRANSPARENT

IP_TTL

IP_UNBLOCK_SOURCE

IP_UNICAST_IF

IP_XFRM_POLICY

ISIG

c_lflag bits

ISTRIP

Strip 8th bit off characters

ITIMER_PROF

ITIMER_REAL

Names of the interval timers, and structure defining a timer setting:

ITIMER_VIRTUAL

IUCLC

c_iflag bits

IUTF8

IXANY

Any character will restart after stop

IXOFF

IXON

KCMP_EPOLL_TFD

KCMP_FILE

Comparison type - enum kcmp_type.

KCMP_FILES

KCMP_FS

KCMP_IO

KCMP_SIGHAND

KCMP_SYSVSEM

KCMP_TYPES

KCMP_VM

KERN_ACCT

BSD process accounting parameters

KERN_ACPI_VIDEO_FLAGS

int: flags for setting up video after ACPI sleep

KERN_BOOTLOADER_TYPE

int: boot loader type

KERN_CADPID

int: PID of the process to notify on CAD

KERN_COMPAT_LOG

int: print compat layer messages

KERN_CORE_PATTERN

string: pattern for core-file names

KERN_CORE_USES_PID

int: use core or core.%pid

KERN_CTLALTDEL

int: allow ctl-alt-del to reboot

KERN_DOMAINNAME

string: domainname

KERN_HOTPLUG

string: path to uevent helper (deprecated)

KERN_HPPA_PWRSW

int: hppa soft-power enable

KERN_HPPA_UNALIGNED

int: hppa unaligned-trap enable

KERN_HZ_TIMER

int: hz timer on or off

KERN_IA64_UNALIGNED

int: ia64 unaligned userland trap enable

KERN_IEEE_EMULATION_WARNINGS

int: unimplemented ieee instructions

KERN_MAX_LOCK_DEPTH

int: rtmutex’s maximum lock depth

KERN_MAX_THREADS

int: Maximum nr of threads in the system

KERN_MODPROBE

string: modprobe path

KERN_MSGMAX

int: Maximum size of a messege

KERN_MSGMNB

int: Maximum message queue size

KERN_MSGMNI

int: msg queue identifiers

KERN_MSGPOOL

int: Maximum system message pool size

KERN_NAMETRANS

Name translation

KERN_NGROUPS_MAX

int: NGROUPS_MAX

KERN_NMI_WATCHDOG

int: enable/disable nmi watchdog

KERN_NODENAME

string: hostname

KERN_OSRELEASE

string: system release

KERN_OSREV

int: system revision

KERN_OSTYPE

CTL_KERN names:

KERN_OVERFLOWGID

int: overflow GID

KERN_OVERFLOWUID

int: overflow UID

KERN_PANIC

int: panic timeout

KERN_PANIC_ON_NMI

int: whether we will panic on an unrecovered

KERN_PANIC_ON_OOPS

int: whether we will panic on an oops

KERN_PANIC_ON_WARN

int: call panic() in WARN() functions

KERN_PANIC_PRINT

ulong: bitmask to print system info on panic

KERN_PIDMAX

int: PID # limit

KERN_PPC_HTABRECLAIM

turn htab reclaimation on/off on PPC

KERN_PPC_L2CR

l2cr register on PPC

KERN_PPC_POWERSAVE_NAP

use nap mode for power saving

KERN_PPC_ZEROPAGED

turn idle page zeroing on/off on PPC

KERN_PRINTK

struct: control printk logging parameters

KERN_PRINTK_RATELIMIT

int: tune printk ratelimiting

KERN_PRINTK_RATELIMIT_BURST

int: tune printk ratelimiting

KERN_PROF

table: profiling information

KERN_PTY

dir: pty driver

KERN_RANDOM

Random driver

KERN_RANDOMIZE

int: randomize virtual address space

KERN_REALROOTDEV

real root device to mount after initrd

KERN_RTSIGMAX

Max queuable

KERN_RTSIGNR

Number of rt sigs queued

KERN_S390_USER_DEBUG_LOGGING

int: dumps of user faults

KERN_SECUREMASK

struct: maximum rights mask

KERN_SEM

struct: sysv semaphore limits

KERN_SETUID_DUMPABLE

int: behaviour of dumps for setuid core

KERN_SG_BIG_BUFF

int: sg driver reserved buffer size

KERN_SHMALL

int: Maximum size of shared memory

KERN_SHMMAX

long: Maximum shared memory segment

KERN_SHMMNI

int: shm array identifiers

KERN_SHMPATH

string: path to shm fs

KERN_SPARC_REBOOT

reboot command on Sparc

KERN_SPARC_SCONS_PWROFF

int: serial console power-off halt

KERN_SPARC_STOP_A

int: Sparc Stop-A enable

KERN_SPIN_RETRY

int: number of spinlock retries

KERN_SYSRQ

int: Sysreq enable

KERN_TAINTED

int: various kernel tainted flags

KERN_UNKNOWN_NMI_PANIC

int: unknown nmi panic flag

KERN_VERSION

string: compile time info

KEXEC_ARCH_68K

KEXEC_ARCH_386

KEXEC_ARCH_AARCH64

KEXEC_ARCH_ARM

KEXEC_ARCH_DEFAULT

These values match the ELF architecture values. Unless there is a good reason that should continue to be the case.

KEXEC_ARCH_IA_64

KEXEC_ARCH_MASK

KEXEC_ARCH_MIPS

KEXEC_ARCH_MIPS_LE

KEXEC_ARCH_PPC

KEXEC_ARCH_PPC64

KEXEC_ARCH_S390

KEXEC_ARCH_SH

KEXEC_ARCH_X86_64

KEXEC_FILE_NO_INITRAMFS

KEXEC_FILE_ON_CRASH

KEXEC_FILE_UNLOAD

Kexec file load interface flags.

KEXEC_ON_CRASH

kexec system call - It loads the new kernel to boot into.

KEXEC_PRESERVE_CONTEXT

KEXEC_SEGMENT_MAX

The artificial cap on the number of segments passed to kexec_load.

KEY_ALLOC_BUILT_IN

Key is built into kernel

KEY_ALLOC_BYPASS_RESTRICTION

Override the check on restricted keyrings

KEY_ALLOC_IN_QUOTA

add to quota, reject if would overrun

KEY_ALLOC_NOT_IN_QUOTA

not in quota

KEY_ALLOC_QUOTA_OVERRUN

add to quota, permit even if overrun

KEY_ALLOC_UID_KEYRING

allocating a user or user session keyring

KEY_DEBUG_MAGIC

authentication token / access credential / keyring

KEY_FLAG_BUILTIN

set if key is built in to the kernel

KEY_FLAG_DEAD

set if key type has been deleted

KEY_FLAG_INVALIDATED

set if key has been invalidated

KEY_FLAG_IN_QUOTA

set if key consumes quota

KEY_FLAG_KEEP

set if key should not be removed

KEY_FLAG_REVOKED

set if key had been revoked

KEY_FLAG_ROOT_CAN_CLEAR

set if key can be cleared by root without permission

KEY_FLAG_ROOT_CAN_INVAL

set if key can be invalidated by root without permission

KEY_FLAG_UID_KEYRING

set if key is a user or user session keyring

KEY_FLAG_USER_CONSTRUCT

set if key is being constructed in userspace

KEY_GRP_ALL

KEY_GRP_LINK

KEY_GRP_READ

KEY_GRP_SEARCH

KEY_GRP_SETATTR

KEY_GRP_VIEW

group permissions…

KEY_GRP_WRITE

KEY_IS_POSITIVE

Positively instantiated

KEY_IS_UNINSTANTIATED

KEY_NEED_ALL

All the above permissions

KEY_NEED_LINK

Require permission to link

KEY_NEED_READ

Require permission to read content

KEY_NEED_SEARCH

Require permission to search (keyring) or find (key)

KEY_NEED_SETATTR

Require permission to change attributes

KEY_NEED_VIEW

The permissions required on a key that we’re looking up. Require permission to view attributes

KEY_NEED_WRITE

Require permission to update / modify

KEY_OTH_ALL

KEY_OTH_LINK

KEY_OTH_READ

KEY_OTH_SEARCH

KEY_OTH_SETATTR

KEY_OTH_VIEW

third party permissions…

KEY_OTH_WRITE

KEY_PERM_UNDEF

KEY_POS_ALL

KEY_POS_LINK

possessor can create a link to a key/keyring

KEY_POS_READ

possessor can read key payload / view keyring

KEY_POS_SEARCH

possessor can find a key in search / search a keyring

KEY_POS_SETATTR

possessor can set key attributes

KEY_POS_VIEW

possessor can view a key’s attributes

KEY_POS_WRITE

possessor can update key payload / add link to keyring

KEY_USR_ALL

KEY_USR_LINK

KEY_USR_READ

KEY_USR_SEARCH

KEY_USR_SETATTR

KEY_USR_VIEW

user permissions…

KEY_USR_WRITE

KTIME_MAX

KTIME_SEC_MAX

LDT_ENTRIES

Definitions of structures used with the modify_ldt system call. Maximum number of LDT entries supported.

LDT_ENTRY_SIZE

The size of each LDT entry.

LINK_MAX

links a file may have

LINUX_CAPABILITY_U32S

LINUX_CAPABILITY_U32S_1

LINUX_CAPABILITY_U32S_2

LINUX_CAPABILITY_U32S_3

LINUX_CAPABILITY_VERSION

Backwardly compatible definition for source code - trapped in a 32-bit world. If you find you need this, please consider using libcap to untrap yourself…

LINUX_CAPABILITY_VERSION_1

User-level do most of the mapping between kernel and user capabilities based on the version tag given by the kernel.

LINUX_CAPABILITY_VERSION_2

deprecated - use v3

LINUX_CAPABILITY_VERSION_3

LINUX_GETCPU_H

LINUX_REBOOT_CMD_CAD_OFF

LINUX_REBOOT_CMD_CAD_ON

LINUX_REBOOT_CMD_HALT

LINUX_REBOOT_CMD_KEXEC

LINUX_REBOOT_CMD_POWER_OFF

LINUX_REBOOT_CMD_RESTART

Commands accepted by the _reboot() system call.

LINUX_REBOOT_CMD_RESTART2

LINUX_REBOOT_CMD_SW_SUSPEND

LINUX_REBOOT_MAGIC1

Magic values required to use _reboot() system call.

LINUX_REBOOT_MAGIC2

LINUX_REBOOT_MAGIC2A

LINUX_REBOOT_MAGIC2B

LINUX_REBOOT_MAGIC2C

LOCK_EX

exclusive lock

LOCK_MAND

This is a mandatory flock …

LOCK_NB

or’d with one of the above to prevent blocking

LOCK_READ

which allows concurrent read operations

LOCK_RW

which allows concurrent read & write ops

LOCK_SH

operations for bsd flock(), also used by the kernel implementation shared lock

LOCK_UN

remove lock

LOCK_WRITE

which allows concurrent write operations

LSMT_ROOT

Special mnt_id values that can be passed to listmount root mount

MADV_COLD

deactivate these pages

MADV_DODUMP

Clear the MADV_DONTDUMP flag

MADV_DOFORK

do inherit across fork

MADV_DONTDUMP

Explicity exclude from the core dump, overrides the coredump filter bits

MADV_DONTFORK

don’t inherit across fork

MADV_DONTNEED

don’t need these pages

MADV_FREE

common parameters: try to keep these consistent across architectures free pages only if memory pressure

MADV_HUGEPAGE

Worth backing with hugepages

MADV_HWPOISON

poison a page for testing

MADV_KEEPONFORK

Undo MADV_WIPEONFORK

MADV_MERGEABLE

KSM may merge identical pages

MADV_NOHUGEPAGE

Not worth backing with hugepages

MADV_NORMAL

no further special treatment

MADV_PAGEOUT

reclaim these pages

MADV_RANDOM

expect random page references

MADV_REMOVE

remove these pages & resources

MADV_SEQUENTIAL

expect sequential page references

MADV_SOFT_OFFLINE

soft offline page for testing

MADV_UNMERGEABLE

KSM may not merge identical pages

MADV_WILLNEED

will need these pages

MADV_WIPEONFORK

Zero memory on fork, child only

MAP_ANONYMOUS

don’t use a file

MAP_DENYWRITE

ETXTBSY

MAP_EXECUTABLE

mark it as an executable

MAP_FILE

compatibility flags

MAP_FIXED

Interpret addr exactly

MAP_FIXED_NOREPLACE

MAP_FIXED which doesn’t unmap underlying mapping

MAP_GROWSDOWN

stack-like segment

MAP_HUGETLB

create a huge page mapping

MAP_HUGE_1GB

MAP_HUGE_1MB

MAP_HUGE_2GB

MAP_HUGE_2MB

MAP_HUGE_8MB

MAP_HUGE_16GB

MAP_HUGE_16MB

MAP_HUGE_32MB

MAP_HUGE_64KB

MAP_HUGE_256MB

MAP_HUGE_512KB

MAP_HUGE_512MB

MAP_HUGE_MASK

MAP_HUGE_SHIFT

Huge page size encoding when MAP_HUGETLB is specified, and a huge page size other than the default is desired.

MAP_LOCKED

pages are locked

MAP_NONBLOCK

do not block on IO

MAP_NORESERVE

don’t check for reservations

MAP_POPULATE

0x0100 - 0x4000 flags are defined in asm-generic/mman.h populate (prefault) pagetables

MAP_PRIVATE

Changes are private

MAP_SHARED

Share changes

MAP_SHARED_VALIDATE

share + validate extension flags

MAP_STACK

give out an address that is best suited for process/thread stacks

MAP_SYNC

perform synchronous page faults for the mapping

MAP_TYPE

0x01 - 0x03 are defined in linux/mman.h Mask for type of mapping

MAP_UNINITIALIZED

For anonymous mmap, memory could be uninitialized

MAXFREQ

max frequency error (ns/s)

MAXPHASE

max phase error (ns)

MAXQUOTAS

MAXSEC

max interval between updates (s)

MAX_BPF_ATTACH_TYPE

MAX_BPF_REG

BPF has 10 general purpose 64-bit registers and stack frame.

MAX_CANON

size of the canonical input queue

MAX_CLOCKS

MAX_INPUT

size of the type-ahead buffer

MAX_SWAPFILES_SHIFT

MAX_SWAPFILES defines the maximum number of swaptypes: things which can be swapped to.

MCAST_BLOCK_SOURCE

MCAST_EXCLUDE

MCAST_INCLUDE

MCAST_JOIN_GROUP

MCAST_JOIN_SOURCE_GROUP

MCAST_LEAVE_GROUP

MCAST_LEAVE_SOURCE_GROUP

MCAST_MSFILTER

MCAST_UNBLOCK_SOURCE

MCL_CURRENT

lock all current mappings

MCL_FUTURE

lock all future mappings

MCL_ONFAULT

lock all pages that are faulted in

MEMBARRIER_CMD_GLOBAL

MEMBARRIER_CMD_GLOBAL_EXPEDITED

MEMBARRIER_CMD_PRIVATE_EXPEDITED

MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE

MEMBARRIER_CMD_QUERY

enum membarrier_cmd - membarrier system call command

MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED

MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED

MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_CORE

MEMBARRIER_CMD_SHARED

Alias for header backward compatibility.

MFD_ALLOW_SEALING

MFD_CLOEXEC

flags for memfd_create(2) (unsigned int)

MFD_HUGETLB

MFD_HUGE_1GB

MFD_HUGE_1MB

MFD_HUGE_2GB

MFD_HUGE_2MB

MFD_HUGE_8MB

MFD_HUGE_16GB

MFD_HUGE_16MB

MFD_HUGE_32MB

MFD_HUGE_64KB

MFD_HUGE_256MB

MFD_HUGE_512KB

MFD_HUGE_512MB

MFD_HUGE_MASK

MFD_HUGE_SHIFT

Huge page size encoding when MFD_HUGETLB is specified, and a huge page size other than the default is desired.

MINSEC

min interval between updates (s)

MINSIGSTKSZ

MLOCK_ONFAULT

Flags for mlock Lock pages in range after they are faulted in, do not prefault

MMAP_PAGE_ZERO

MNT_DETACH

Just detach from the tree

MNT_EXPIRE

Mark for expiry

MNT_FORCE

Umount options Attempt to forcibily umount

MNT_ID_REQ_SIZE_VER0

List of all mnt_id_req versions. sizeof first published struct

MNT_NS_INDEX

MODIFY_LDT_CONTENTS_CODE

MODIFY_LDT_CONTENTS_DATA

MODIFY_LDT_CONTENTS_STACK

MOD_ESTERROR

MOD_FREQUENCY

MOD_MAXERROR

MOD_MICRO

MOD_NANO

MOD_OFFSET

NTP userland likes the MOD_ prefix better

MOD_STATUS

MOD_TAI

MOD_TIMECONST

MOUNT_ATTR_IDMAP

Idmap mount to @userns_fd in struct mount_attr.

MOUNT_ATTR_NOATIME

Do not update access times.

MOUNT_ATTR_NODEV

Disallow access to device special files

MOUNT_ATTR_NODIRATIME

Do not update directory access times

MOUNT_ATTR_NOEXEC

Disallow program execution

MOUNT_ATTR_NOSUID

Ignore suid and sgid bits

MOUNT_ATTR_NOSYMFOLLOW

Do not follow symlinks

MOUNT_ATTR_RDONLY

Mount attributes used in fsmount(). Mount read-only

MOUNT_ATTR_RELATIME

Update atime relative to mtime/ctime.

MOUNT_ATTR_SIZE_VER0

List of all mount_attr versions. sizeof first published struct

MOUNT_ATTR_STRICTATIME

Always perform atime updates

MOUNT_ATTR__ATIME

Setting on how atime should be updated

MOVE_MOUNT_BENEATH

Mount beneath top mount

MOVE_MOUNT_F_AUTOMOUNTS

Follow automounts on from path

MOVE_MOUNT_F_EMPTY_PATH

Empty from path permitted

MOVE_MOUNT_F_SYMLINKS

move_mount() flags. Follow symlinks on from path

MOVE_MOUNT_SET_GROUP

Set sharing group instead

MOVE_MOUNT_T_AUTOMOUNTS

Follow automounts on to path

MOVE_MOUNT_T_EMPTY_PATH

Empty to path permitted

MOVE_MOUNT_T_SYMLINKS

Follow symlinks on to path

MOVE_MOUNT__MASK

MPOL_BIND

MPOL_DEFAULT

Policies

MPOL_F_ADDR

look up vma using address

MPOL_F_LOCAL

preferred local allocation

MPOL_F_MEMS_ALLOWED

return allowed memories

MPOL_F_MOF

this policy wants migrate on fault

MPOL_F_MORON

Migrate On protnone Reference On Node

MPOL_F_NODE

Flags for get_mempolicy return next IL mode instead of node mask

MPOL_F_RELATIVE_NODES

MPOL_F_SHARED

Internal flags that share the struct mempolicy flags word with “mode flags”.

MPOL_F_STATIC_NODES

Flags for set_mempolicy

MPOL_INTERLEAVE

MPOL_LOCAL

MPOL_MAX

always last member of enum

MPOL_MF_INTERNAL

Internal flags start here

MPOL_MF_LAZY

Modifies ’_MOVE: lazy migrate on fault

MPOL_MF_MOVE

Move pages owned by this process to conform to policy

MPOL_MF_MOVE_ALL

Move every page to conform to policy

MPOL_MF_STRICT

Flags for mbind Verify existing pages in the mapping

MPOL_MF_VALID

MPOL_MODE_FLAGS

MPOL_MODE_FLAGS is the union of all possible optional mode flags passed to either set_mempolicy() or mbind().

MPOL_PREFERRED

MQ_BYTES_MAX

per-uid limit of kernel memory used by mqueue, in bytes

MQ_PRIO_MAX

MREMAP_DONTUNMAP

MREMAP_FIXED

MREMAP_MAYMOVE

MSEC_PER_SEC

Parameters used to convert the timespec values:

MSGCTL

MSGGET

MSGMAP

number of entries in message map

MSGMAX

<= INT_MAX, max size of message (bytes)

MSGMNB

<= INT_MAX, default max size of a message queue

MSGMNI

MSGMNI, MSGMAX and MSGMNB are default values which can be modified by sysctl.

MSGPOOL

unused

MSGRCV

MSGSEG

max no. of segments

MSGSND

MSGSSZ

message segment size

MSGTQL

number of system message headers

MSG_BATCH

sendmmsg(): more messages coming

MSG_CMSG_CLOEXEC

Set close_on_exec for file descriptor received through SCM_RIGHTS

MSG_CMSG_COMPAT

We never have 32 bit fixups

MSG_CONFIRM

Confirm path validity

MSG_COPY

copy (not remove) all queue messages

MSG_CTRUNC

MSG_DONTROUTE

MSG_DONTWAIT

Nonblocking io

MSG_EOF

MSG_EOR

End of record

MSG_ERRQUEUE

Fetch message from error queue

MSG_EXCEPT

recv any msg except of specified type.

MSG_FASTOPEN

Send data in TCP SYN

MSG_FIN

MSG_INFO

MSG_MORE

Sender will send more

MSG_NOERROR

msgrcv options no error if message is too big

MSG_NOSIGNAL

Do not generate SIGPIPE

MSG_NO_SHARED_FRAGS

sendpage() internal : page frags are not shared

MSG_OOB

Flags we can use with send/ and recv. Added those for 1003.1g not all are supported yet

MSG_PEEK

MSG_PROBE

Do not send. Only probe path f.e. for MTU

MSG_RST

MSG_SENDPAGE_DECRYPTED

sendpage() internal : page may carry plain text and require encryption

MSG_SENDPAGE_NOPOLICY

sendpage() internal : do no apply policy

MSG_SENDPAGE_NOTLAST

sendpage() internal : not the last page

MSG_STAT

ipcs ctl commands

MSG_STAT_ANY

MSG_SYN

MSG_TRUNC

MSG_TRYHARD

Synonym for MSG_DONTROUTE for DECnet

MSG_WAITALL

Wait for a full request

MSG_WAITFORONE

recvmmsg(): block until 1+ packets avail

MSG_ZEROCOPY

Use user data in kernel path

MS_ACTIVE

MS_ASYNC

sync memory asynchronously

MS_BIND

MS_BORN

MS_DIRSYNC

Directory modifications are synchronous

MS_INVALIDATE

invalidate the caches

MS_I_VERSION

Update inode I_version field

MS_KERNMOUNT

this is a kern_mount call

MS_LAZYTIME

Update the on-disk acm times lazily

MS_MANDLOCK

Allow mandatory locks on an FS

MS_MGC_MSK

MS_MGC_VAL

Old magic mount flag and mask

MS_MOVE

MS_NOATIME

Do not update access times.

MS_NODEV

Disallow access to device special files

MS_NODIRATIME

Do not update directory access times

MS_NOEXEC

Disallow program execution

MS_NOREMOTELOCK

MS_NOSEC

MS_NOSUID

Ignore suid and sgid bits

MS_NOUSER

MS_POSIXACL

VFS does not apply the umask

MS_PRIVATE

change to private

MS_RDONLY

These are the fs-independent mount-flags: up to 32 flags are supported

MS_REC

MS_RELATIME

Update atime relative to mtime/ctime.

MS_REMOUNT

Alter flags of a mounted FS

MS_RMT_MASK

Superblock flags that can be altered by MS_REMOUNT

MS_SHARED

change to shared

MS_SILENT

MS_SLAVE

change to slave

MS_STRICTATIME

Always perform atime updates

MS_SUBMOUNT

These sb flags are internal to the kernel

MS_SYNC

synchronous memory sync

MS_SYNCHRONOUS

Writes are synced at once

MS_UNBINDABLE

change to unbindable

MS_VERBOSE

MS_VERBOSE is deprecated.

NAME_MAX

chars in a file name

NCC

NCCS

NET_802

NET_ATALK

NET_ATALK_AARP_EXPIRY_TIME

/proc/sys/net/appletalk

NET_ATALK_AARP_RESOLVE_TIME

NET_ATALK_AARP_RETRANSMIT_LIMIT

NET_ATALK_AARP_TICK_TIME

NET_AX25

NET_AX25_BACKOFF_TYPE

NET_AX25_CONNECT_MODE

NET_AX25_DAMA_SLAVE_TIMEOUT

NET_AX25_DEFAULT_MODE

NET_AX25_EXTENDED_WINDOW

NET_AX25_IDLE_TIMEOUT

NET_AX25_IP_DEFAULT_MODE

/proc/sys/net/ax25

NET_AX25_N2

NET_AX25_PACLEN

NET_AX25_PROTOCOL

NET_AX25_STANDARD_WINDOW

NET_AX25_T1_TIMEOUT

NET_AX25_T2_TIMEOUT

NET_AX25_T3_TIMEOUT

NET_BRIDGE

NET_BRIDGE_NF_CALL_ARPTABLES

/proc/sys/net/bridge

NET_BRIDGE_NF_CALL_IP6TABLES

NET_BRIDGE_NF_CALL_IPTABLES

NET_BRIDGE_NF_FILTER_PPPOE_TAGGED

NET_BRIDGE_NF_FILTER_VLAN_TAGGED

NET_CIPSOV4_CACHE_BUCKET_SIZE

NET_CIPSOV4_CACHE_ENABLE

NET_CIPSOV4_RBM_OPTFMT

NET_CIPSOV4_RBM_STRICTVALID

NET_CORE

CTL_NET names:

NET_CORE_AEVENT_ETIME

NET_CORE_AEVENT_RSEQTH

NET_CORE_BUDGET

NET_CORE_DEV_WEIGHT

NET_CORE_DIVERT_VERSION

NET_CORE_FASTROUTE

NET_CORE_HOT_LIST_LENGTH

NET_CORE_LO_CONG

NET_CORE_MAX_BACKLOG

was NET_CORE_DESTROY_DELAY

NET_CORE_MOD_CONG

NET_CORE_MSG_BURST

NET_CORE_MSG_COST

NET_CORE_NO_CONG

NET_CORE_NO_CONG_THRESH

NET_CORE_OPTMEM_MAX

NET_CORE_RMEM_DEFAULT

NET_CORE_RMEM_MAX

NET_CORE_SOMAXCONN

NET_CORE_WARNINGS

NET_CORE_WMEM_DEFAULT

NET_CORE_WMEM_MAX

/proc/sys/net/core

NET_DCCP

NET_DCCP_DEFAULT

/proc/sys/net/dccp

NET_DECNET

NET_DECNET_CONF

NET_DECNET_CONF_DDCMP

NET_DECNET_CONF_DEV_BLKSIZE

NET_DECNET_CONF_DEV_FORWARDING

NET_DECNET_CONF_DEV_PRIORITY

/proc/sys/net/decnet/conf/<dev>/

NET_DECNET_CONF_DEV_STATE

NET_DECNET_CONF_DEV_T1

NET_DECNET_CONF_DEV_T2

NET_DECNET_CONF_DEV_T3

NET_DECNET_CONF_ETHER

NET_DECNET_CONF_GRE

NET_DECNET_CONF_LOOPBACK

/proc/sys/net/decnet/conf/<dev>

NET_DECNET_CONF_PPP

NET_DECNET_CONF_X25

NET_DECNET_DEBUG_LEVEL

NET_DECNET_DEFAULT_DEVICE

NET_DECNET_DI_COUNT

NET_DECNET_DN_COUNT

NET_DECNET_DR_COUNT

NET_DECNET_DST_GC_INTERVAL

NET_DECNET_MEM

NET_DECNET_NODE_ADDRESS

NET_DECNET_NODE_NAME

NET_DECNET_NODE_TYPE

/proc/sys/net/decnet/

NET_DECNET_NO_FC_MAX_CWND

NET_DECNET_RMEM

NET_DECNET_TIME_WAIT

NET_DECNET_WMEM

NET_ECONET

NET_ETHER

NET_IPV4

NET_IPV6

NET_IPV4_ALWAYS_DEFRAG

NET_IPV4_AUTOCONFIG

NET_IPV4_CONF

NET_IPV4_CONF_ACCEPT_REDIRECTS

NET_IPV4_CONF_ACCEPT_SOURCE_ROUTE

NET_IPV4_CONF_ARPFILTER

NET_IPV4_CONF_ARP_ACCEPT

NET_IPV4_CONF_ARP_ANNOUNCE

NET_IPV4_CONF_ARP_IGNORE

NET_IPV4_CONF_ARP_NOTIFY

NET_IPV4_CONF_BOOTP_RELAY

NET_IPV4_CONF_FORCE_IGMP_VERSION

NET_IPV4_CONF_FORWARDING

NET_IPV4_CONF_LOG_MARTIANS

NET_IPV4_CONF_MC_FORWARDING

NET_IPV4_CONF_MEDIUM_ID

NET_IPV4_CONF_NOPOLICY

NET_IPV4_CONF_NOXFRM

NET_IPV4_CONF_PROMOTE_SECONDARIES

NET_IPV4_CONF_PROXY_ARP

NET_IPV4_CONF_RP_FILTER

NET_IPV4_CONF_SECURE_REDIRECTS

NET_IPV4_CONF_SEND_REDIRECTS

NET_IPV4_CONF_SHARED_MEDIA

NET_IPV4_CONF_TAG

NET_IPV4_DEFAULT_TTL

NET_IPV4_DYNADDR

NET_IPV4_FIB_HASH

NET_IPV4_FORWARD

/proc/sys/net/ipv4

NET_IPV4_ICMP_DESTUNREACH_RATE

NET_IPV4_ICMP_ECHOREPLY_RATE

NET_IPV4_ICMP_ECHO_IGNORE_ALL

NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS

NET_IPV4_ICMP_ERRORS_USE_INBOUND_IFADDR

NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES

NET_IPV4_ICMP_PARAMPROB_RATE

NET_IPV4_ICMP_RATELIMIT

NET_IPV4_ICMP_RATEMASK

NET_IPV4_ICMP_SOURCEQUENCH_RATE

NET_IPV4_ICMP_TIMEEXCEED_RATE

NET_IPV4_IGMP_MAX_MEMBERSHIPS

NET_IPV4_IGMP_MAX_MSF

NET_IPV4_INET_PEER_GC_MAXTIME

NET_IPV4_INET_PEER_GC_MINTIME

NET_IPV4_INET_PEER_MAXTTL

NET_IPV4_INET_PEER_MINTTL

NET_IPV4_INET_PEER_THRESHOLD

NET_IPV4_IPFRAG_HIGH_THRESH

NET_IPV4_IPFRAG_LOW_THRESH

NET_IPV4_IPFRAG_MAX_DIST

NET_IPV4_IPFRAG_SECRET_INTERVAL

NET_IPV4_IPFRAG_TIME

NET_IPV4_IP_MASQ_DEBUG

NET_IPV4_LOCAL_PORT_RANGE

NET_IPV4_NEIGH

NET_IPV4_NETFILTER

NET_IPV4_NF_CONNTRACK_BUCKETS

NET_IPV4_NF_CONNTRACK_CHECKSUM

NET_IPV4_NF_CONNTRACK_COUNT

NET_IPV4_NF_CONNTRACK_GENERIC_TIMEOUT

NET_IPV4_NF_CONNTRACK_ICMP_TIMEOUT

NET_IPV4_NF_CONNTRACK_LOG_INVALID

NET_IPV4_NF_CONNTRACK_MAX

/proc/sys/net/ipv4/netfilter

NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED

NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED

NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT

NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED

NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT

NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD

NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT

NET_IPV4_NF_CONNTRACK_TCP_BE_LIBERAL

NET_IPV4_NF_CONNTRACK_TCP_LOOSE

NET_IPV4_NF_CONNTRACK_TCP_MAX_RETRANS

NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE

NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT

NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED

NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT

NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK

NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS

NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV

NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT

NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT

NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT

NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT_STREAM

NET_IPV4_NONLOCAL_BIND

NET_IPV4_NO_PMTU_DISC

NET_IPV4_ROUTE

NET_IPV4_ROUTE_ERROR_BURST

NET_IPV4_ROUTE_ERROR_COST

NET_IPV4_ROUTE_FLUSH

NET_IPV4_ROUTE_GC_ELASTICITY

NET_IPV4_ROUTE_GC_INTERVAL

obsolete since 2.6.38

NET_IPV4_ROUTE_GC_MIN_INTERVAL

NET_IPV4_ROUTE_GC_MIN_INTERVAL_MS

NET_IPV4_ROUTE_GC_THRESH

NET_IPV4_ROUTE_GC_TIMEOUT

NET_IPV4_ROUTE_MAX_DELAY

obsolete since 2.6.25

NET_IPV4_ROUTE_MAX_SIZE

NET_IPV4_ROUTE_MIN_ADVMSS

NET_IPV4_ROUTE_MIN_DELAY

obsolete since 2.6.25

NET_IPV4_ROUTE_MIN_PMTU

NET_IPV4_ROUTE_MTU_EXPIRES

NET_IPV4_ROUTE_REDIRECT_LOAD

NET_IPV4_ROUTE_REDIRECT_NUMBER

NET_IPV4_ROUTE_REDIRECT_SILENCE

NET_IPV4_ROUTE_SECRET_INTERVAL

NET_IPV4_TCP_FIN_TIMEOUT

NET_IPV4_TCP_KEEPALIVE_INTVL

NET_IPV4_TCP_KEEPALIVE_PROBES

NET_IPV4_TCP_KEEPALIVE_TIME

NET_IPV4_TCP_MAX_KA_PROBES

NET_IPV4_TCP_RETRANS_COLLAPSE

NET_IPV4_TCP_RETRIES1

NET_IPV4_TCP_RETRIES2

NET_IPV4_TCP_SACK

NET_IPV4_TCP_SYN_RETRIES

NET_IPV4_TCP_TIMESTAMPS

NET_IPV4_TCP_WINDOW_SCALING

NET_IPV4_TCP_WORKAROUND_SIGNED_WINDOWS

NET_IPV6_ACCEPT_RA

NET_IPV6_ACCEPT_RA_DEFRTR

NET_IPV6_ACCEPT_RA_FROM_LOCAL

NET_IPV6_ACCEPT_RA_PINFO

NET_IPV6_ACCEPT_RA_RTR_PREF

NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN

NET_IPV6_ACCEPT_RA_RT_INFO_MIN_PLEN

NET_IPV6_ACCEPT_REDIRECTS

NET_IPV6_ACCEPT_SOURCE_ROUTE

NET_IPV6_AUTOCONF

NET_IPV6_BINDV6ONLY

NET_IPV6_CONF

/proc/sys/net/ipv6

NET_IPV6_DAD_TRANSMITS

NET_IPV6_FORCE_MLD_VERSION

NET_IPV6_FORWARDING

NET_IPV6_HOP_LIMIT

NET_IPV6_ICMP

NET_IPV6_ICMP_ECHO_IGNORE_ALL

NET_IPV6_ICMP_RATELIMIT

/proc/sys/net/ipv6/icmp

NET_IPV6_IP6FRAG_HIGH_THRESH

NET_IPV6_IP6FRAG_LOW_THRESH

NET_IPV6_IP6FRAG_SECRET_INTERVAL

NET_IPV6_IP6FRAG_TIME

NET_IPV6_MAX

NET_IPV6_MAX_ADDRESSES

NET_IPV6_MAX_DESYNC_FACTOR

NET_IPV6_MLD_MAX_MSF

NET_IPV6_MTU

NET_IPV6_NEIGH

NET_IPV6_PROXY_NDP

NET_IPV6_REGEN_MAX_RETRY

NET_IPV6_ROUTE

NET_IPV6_ROUTE_FLUSH

NET_IPV6_ROUTE_GC_ELASTICITY

NET_IPV6_ROUTE_GC_INTERVAL

NET_IPV6_ROUTE_GC_MIN_INTERVAL

NET_IPV6_ROUTE_GC_MIN_INTERVAL_MS

NET_IPV6_ROUTE_GC_THRESH

NET_IPV6_ROUTE_GC_TIMEOUT

NET_IPV6_ROUTE_MAX_SIZE

NET_IPV6_ROUTE_MIN_ADVMSS

NET_IPV6_ROUTE_MTU_EXPIRES

NET_IPV6_RTR_PROBE_INTERVAL

NET_IPV6_RTR_SOLICITS

NET_IPV6_RTR_SOLICIT_DELAY

NET_IPV6_RTR_SOLICIT_INTERVAL

NET_IPV6_TEMP_PREFERED_LFT

NET_IPV6_TEMP_VALID_LFT

NET_IPV6_USE_TEMPADDR

NET_IPX

NET_IPX_FORWARDING

NET_IPX_PPROP_BROADCASTING

/proc/sys/net/ipx

NET_IRDA

NET_LLC

NET_LLC2

/proc/sys/net/llc

NET_LLC2_ACK_TIMEOUT

/proc/sys/net/llc/llc2/timeout

NET_LLC2_BUSY_TIMEOUT

NET_LLC2_P_TIMEOUT

NET_LLC2_REJ_TIMEOUT

NET_LLC2_TIMEOUT

/proc/sys/net/llc/llc2

NET_LLC_STATION

NET_LLC_STATION_ACK_TIMEOUT

/proc/sys/net/llc/station

NET_NEIGH_ANYCAST_DELAY

NET_NEIGH_APP_SOLICIT

NET_NEIGH_DELAY_PROBE_TIME

NET_NEIGH_GC_INTERVAL

NET_NEIGH_GC_STALE_TIME

NET_NEIGH_GC_THRESH1

NET_NEIGH_GC_THRESH2

NET_NEIGH_GC_THRESH3

NET_NEIGH_LOCKTIME

NET_NEIGH_MCAST_SOLICIT

/proc/sys/net/<protocol>/neigh/<dev>

NET_NEIGH_PROXY_DELAY

NET_NEIGH_PROXY_QLEN

NET_NEIGH_REACHABLE_TIME

NET_NEIGH_REACHABLE_TIME_MS

NET_NEIGH_RETRANS_TIME

NET_NEIGH_RETRANS_TIME_MS

NET_NEIGH_UCAST_SOLICIT

NET_NEIGH_UNRES_QLEN

NET_NETFILTER

NET_NETROM

NET_NETROM_DEFAULT_PATH_QUALITY

/proc/sys/net/netrom

NET_NETROM_LINK_FAILS_COUNT

NET_NETROM_NETWORK_TTL_INITIALISER

NET_NETROM_OBSOLESCENCE_COUNT_INITIALISER

NET_NETROM_RESET

NET_NETROM_ROUTING_CONTROL

NET_NETROM_TRANSPORT_ACKNOWLEDGE_DELAY

NET_NETROM_TRANSPORT_BUSY_DELAY

NET_NETROM_TRANSPORT_MAXIMUM_TRIES

NET_NETROM_TRANSPORT_NO_ACTIVITY_TIMEOUT

NET_NETROM_TRANSPORT_REQUESTED_WINDOW_SIZE

NET_NETROM_TRANSPORT_TIMEOUT

NET_NF_CONNTRACK_BUCKETS

NET_NF_CONNTRACK_CHECKSUM

NET_NF_CONNTRACK_COUNT

NET_NF_CONNTRACK_FRAG6_HIGH_THRESH

NET_NF_CONNTRACK_FRAG6_LOW_THRESH

NET_NF_CONNTRACK_FRAG6_TIMEOUT

NET_NF_CONNTRACK_GENERIC_TIMEOUT

NET_NF_CONNTRACK_ICMPV6_TIMEOUT

NET_NF_CONNTRACK_ICMP_TIMEOUT

NET_NF_CONNTRACK_LOG_INVALID

NET_NF_CONNTRACK_MAX

/proc/sys/net/netfilter

NET_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED

NET_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED

NET_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT

NET_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED

NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT

NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD

NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT

NET_NF_CONNTRACK_TCP_BE_LIBERAL

NET_NF_CONNTRACK_TCP_LOOSE

NET_NF_CONNTRACK_TCP_MAX_RETRANS

NET_NF_CONNTRACK_TCP_TIMEOUT_CLOSE

NET_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT

NET_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED

NET_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT

NET_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK

NET_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS

NET_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV

NET_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT

NET_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT

NET_NF_CONNTRACK_UDP_TIMEOUT

NET_NF_CONNTRACK_UDP_TIMEOUT_STREAM

NET_NS_INDEX

NET_PROTO_CONF_ALL

NET_PROTO_CONF_DEFAULT

NET_ROSE

NET_ROSE_ACK_HOLD_BACK_TIMEOUT

NET_ROSE_CALL_REQUEST_TIMEOUT

NET_ROSE_CLEAR_REQUEST_TIMEOUT

NET_ROSE_LINK_FAIL_TIMEOUT

NET_ROSE_MAX_VCS

NET_ROSE_NO_ACTIVITY_TIMEOUT

NET_ROSE_RESET_REQUEST_TIMEOUT

NET_ROSE_RESTART_REQUEST_TIMEOUT

/proc/sys/net/rose

NET_ROSE_ROUTING_CONTROL

NET_ROSE_WINDOW_SIZE

NET_SCTP

NET_SCTP_ADDIP_ENABLE

NET_SCTP_ASSOCIATION_MAX_RETRANS

NET_SCTP_HB_INTERVAL

NET_SCTP_MAX_BURST

NET_SCTP_MAX_INIT_RETRANSMITS

NET_SCTP_PATH_MAX_RETRANS

NET_SCTP_PRESERVE_ENABLE

NET_SCTP_PRSCTP_ENABLE

NET_SCTP_RCVBUF_POLICY

NET_SCTP_RTO_ALPHA

NET_SCTP_RTO_BETA

NET_SCTP_RTO_INITIAL

/proc/sys/net/sctp

NET_SCTP_RTO_MAX

NET_SCTP_RTO_MIN

NET_SCTP_SACK_TIMEOUT

NET_SCTP_SNDBUF_POLICY

NET_SCTP_VALID_COOKIE_LIFE

NET_TCP_ABC

NET_TCP_ABORT_ON_OVERFLOW

NET_TCP_ADV_WIN_SCALE

NET_TCP_ALLOWED_CONG_CONTROL

NET_TCP_APP_WIN

NET_TCP_AVAIL_CONG_CONTROL

NET_TCP_BASE_MSS

NET_TCP_BIC_BETA

NET_TCP_CONG_CONTROL

NET_TCP_DEFAULT_WIN_SCALE

NET_TCP_DMA_COPYBREAK

NET_TCP_DSACK

NET_TCP_ECN

NET_TCP_FACK

NET_TCP_FRTO

NET_TCP_FRTO_RESPONSE

NET_TCP_LOW_LATENCY

NET_TCP_MAX_ORPHANS

NET_TCP_MAX_SSTHRESH

NET_TCP_MAX_SYN_BACKLOG

NET_TCP_MAX_TW_BUCKETS

NET_TCP_MEM

NET_TCP_MODERATE_RCVBUF

NET_TCP_MTU_PROBING

NET_TCP_NO_METRICS_SAVE

NET_TCP_ORPHAN_RETRIES

NET_TCP_REORDERING

NET_TCP_RFC1337

NET_TCP_RMEM

NET_TCP_SLOW_START_AFTER_IDLE

NET_TCP_STDURG

NET_TCP_SYNACK_RETRIES

NET_TCP_SYNCOOKIES

NET_TCP_SYN_TAILDROP

NET_TCP_TSO_WIN_DIVISOR

NET_TCP_TW_RECYCLE

NET_TCP_TW_REUSE

NET_TCP_WMEM

NET_TR

NET_TR_RIF_TIMEOUT

/proc/sys/net/token-ring

NET_UNIX

NET_UNIX_DELETE_DELAY

NET_UNIX_DESTROY_DELAY

/proc/sys/net/unix

NET_UNIX_MAX_DGRAM_QLEN

NET_X25

NET_X25_ACK_HOLD_BACK_TIMEOUT

NET_X25_CALL_REQUEST_TIMEOUT

NET_X25_CLEAR_REQUEST_TIMEOUT

NET_X25_FORWARD

NET_X25_RESET_REQUEST_TIMEOUT

NET_X25_RESTART_REQUEST_TIMEOUT

/proc/sys/net/x25

NGROUPS_MAX

supplemental group IDs are available

NL0

NL1

NLDLY

NOFLSH

NOTIFY_COOKIE_LEN

NOTIFY_NONE

SIGEV_THREAD implementation:

NOTIFY_REMOVED

NOTIFY_WOKENUP

NPROTO

NET: An implementation of the SOCKET network access protocol. This is the master header file for the Linux NET layer, or, in plain English: the networking handling part of the kernel.

NR_FILE

NR_NAMESPACES

number of available namespaces

NR_OPEN

NSEC_PER_MSEC

NSEC_PER_SEC

NSEC_PER_USEC

NSIGBUS

NSIGCHLD

NSIGEMT

NSIGFPE

NSIGILL

NSIGPOLL

NSIGSEGV

NSIGSYS

NSIGTRAP

NTP_API

NTP API version

NTP_SCALE_SHIFT

OCRNL

OFDEL

OFILL

OLCUC

c_oflag bits

ONLCR

ONLRET

ONOCR

OPEN_TREE_CLOEXEC

Close the file on execve()

OPEN_TREE_CLONE

open_tree() flags. Clone the target tree and attach the clone

OPOST

c_oflag bits

ORIG_RAX

On syscall entry, this is syscall#. On CPU exception, this is error code. On hw interrupt, it’s IRQ number:

OVERCOMMIT_ALWAYS

OVERCOMMIT_GUESS

OVERCOMMIT_NEVER

O_ACCMODE

O_APPEND

O_CLOEXEC

set close_on_exec

O_CREAT

not fcntl

O_DIRECT

direct disk access hint

O_DIRECTORY

must be a directory

O_DSYNC

used to be O_SYNC, see below

O_EXCL

not fcntl

O_LARGEFILE

O_NDELAY

O_NOATIME

O_NOCTTY

not fcntl

O_NOFOLLOW

don’t follow links

O_NONBLOCK

O_PATH

O_RDONLY

O_RDWR

O_SYNC

O_TMPFILE

a horrid kludge trying to make sure that this will fail on old kernels

O_TMPFILE_MASK

O_TRUNC

not fcntl

O_WRONLY

PAGE_MASK

PAGE_OFFSET

PAGE_SIZE

PARENB

PARMRK

Mark parity and framing errors

PARODD

PATH_MAX

chars in a path name including nul

PENDIN

PERF_ATTR_SIZE_VER0

sizeof first published struct

PERF_ATTR_SIZE_VER1

add: config2

PERF_ATTR_SIZE_VER2

add: branch_sample_type

PERF_ATTR_SIZE_VER3

add: sample_regs_user add: sample_stack_user

PERF_ATTR_SIZE_VER4

add: sample_regs_intr

PERF_ATTR_SIZE_VER5

add: aux_watermark

PERF_AUX_FLAG_COLLISION

sample collided with another

PERF_AUX_FLAG_OVERWRITE

snapshot from overwrite mode

PERF_AUX_FLAG_PARTIAL

record contains gaps

PERF_AUX_FLAG_TRUNCATED

PERF_RECORD_AUX::flags bits record was truncated to fit

PERF_BR_CALL

function call

PERF_BR_COND

conditional

PERF_BR_COND_CALL

conditional function call

PERF_BR_COND_RET

conditional function return

PERF_BR_IND

indirect

PERF_BR_IND_CALL

indirect function call

PERF_BR_MAX

PERF_BR_RET

function return

PERF_BR_SYSCALL

syscall

PERF_BR_SYSRET

syscall return

PERF_BR_UNCOND

unconditional

PERF_BR_UNKNOWN

Common flow change classification unknown

PERF_FLAG_FD_CLOEXEC

O_CLOEXEC

PERF_FLAG_FD_NO_GROUP

PERF_FLAG_FD_OUTPUT

PERF_FLAG_PID_CGROUP

pid=cgroup id, per-cpu mode only

PERF_IOC_FLAG_GROUP

Ioctls that can be done on a perf event fd:

PERF_MAX_CONTEXTS_PER_STACK

PERF_MAX_STACK_DEPTH

PERF_MEM_LOCK_LOCKED

locked transaction

PERF_MEM_LOCK_NA

locked instruction not available

PERF_MEM_LOCK_SHIFT

PERF_MEM_LVLNUM_ANY_CACHE

5-0xa available Any cache

PERF_MEM_LVLNUM_L1

L1

PERF_MEM_LVLNUM_L2

L2

PERF_MEM_LVLNUM_L3

L3

PERF_MEM_LVLNUM_L4

L4

PERF_MEM_LVLNUM_LFB

LFB

PERF_MEM_LVLNUM_NA

N/A

PERF_MEM_LVLNUM_PMEM

PMEM

PERF_MEM_LVLNUM_RAM

RAM

PERF_MEM_LVLNUM_SHIFT

PERF_MEM_LVL_HIT

hit level

PERF_MEM_LVL_IO

I/O memory

PERF_MEM_LVL_L1

L1

PERF_MEM_LVL_L2

L2

PERF_MEM_LVL_L3

L3

PERF_MEM_LVL_LFB

Line Fill Buffer

PERF_MEM_LVL_LOC_RAM

Local DRAM

PERF_MEM_LVL_MISS

miss level

PERF_MEM_LVL_NA

memory hierarchy (memory level, hit or miss) not available

PERF_MEM_LVL_REM_CCE1

Remote Cache (1 hop)

PERF_MEM_LVL_REM_CCE2

Remote Cache (2 hops)

PERF_MEM_LVL_REM_RAM1

Remote DRAM (1 hop)

PERF_MEM_LVL_REM_RAM2

Remote DRAM (2 hops)

PERF_MEM_LVL_SHIFT

PERF_MEM_LVL_UNC

Uncached memory

PERF_MEM_OP_EXEC

code (execution)

PERF_MEM_OP_LOAD

load instruction

PERF_MEM_OP_NA

type of opcode (load/store/prefetch,code) not available

PERF_MEM_OP_PFETCH

prefetch

PERF_MEM_OP_SHIFT

PERF_MEM_OP_STORE

store instruction

PERF_MEM_REMOTE_REMOTE

Remote

PERF_MEM_REMOTE_SHIFT

PERF_MEM_SNOOPX_FWD

forward

PERF_MEM_SNOOPX_SHIFT

1 free

PERF_MEM_SNOOP_HIT

snoop hit

PERF_MEM_SNOOP_HITM

snoop hit modified

PERF_MEM_SNOOP_MISS

snoop miss

PERF_MEM_SNOOP_NA

snoop mode not available

PERF_MEM_SNOOP_NONE

no snoop

PERF_MEM_SNOOP_SHIFT

PERF_MEM_TLB_HIT

hit level

PERF_MEM_TLB_L1

L1

PERF_MEM_TLB_L2

L2

PERF_MEM_TLB_MISS

miss level

PERF_MEM_TLB_NA

TLB access not available

PERF_MEM_TLB_OS

OS fault handler

PERF_MEM_TLB_SHIFT

PERF_MEM_TLB_WK

Hardware Walker

PERF_RECORD_KSYMBOL_FLAGS_UNREGISTER

PERF_RECORD_MISC_COMM_EXEC

PERF_RECORD_MISC_CPUMODE_MASK

PERF_RECORD_MISC_CPUMODE_UNKNOWN

PERF_RECORD_MISC_EXACT_IP

These PERF_RECORD_MISC_* flags below are safely reused for the following events:

PERF_RECORD_MISC_EXT_RESERVED

Reserve the last bit to indicate some extended misc field

PERF_RECORD_MISC_GUEST_KERNEL

PERF_RECORD_MISC_GUEST_USER

PERF_RECORD_MISC_HYPERVISOR

PERF_RECORD_MISC_KERNEL

PERF_RECORD_MISC_MMAP_DATA

Following PERF_RECORD_MISC_* are used on different events, so can reuse the same bit position:

PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT

Indicates that /proc/PID/maps parsing are truncated by time out.

PERF_RECORD_MISC_SWITCH_OUT

PERF_RECORD_MISC_SWITCH_OUT_PREEMPT

PERF_RECORD_MISC_USER

PERF_SAMPLE_BRANCH_PLM_ALL

PERF_SAMPLE_WEIGHT_TYPE

PERF_TXN_ABORT_MASK

bits 32..63 are reserved for the abort code

PERF_TXN_ABORT_SHIFT

PERF_TXN_ASYNC

Instruction not related

PERF_TXN_CAPACITY_READ

Capacity read abort

PERF_TXN_CAPACITY_WRITE

Capacity write abort

PERF_TXN_CONFLICT

Conflict abort

PERF_TXN_ELISION

Values for the memory transaction event qualifier, mostly for abort events. Multiple bits can be set. From elision

PERF_TXN_MAX

non-ABI

PERF_TXN_RETRY

Retry possible

PERF_TXN_SYNC

Instruction is related

PERF_TXN_TRANSACTION

From transaction

PER_BSD

PER_CLEAR_ON_SETID

Security-relevant compatibility flags that must be cleared upon setuid or setgid exec:

PER_HPUX

PER_IRIX32

IRIX5 32-bit

PER_IRIX64

IRIX6 64-bit

PER_IRIXN32

IRIX6 new 32-bit

PER_ISCR4

PER_LINUX

Personality types.

PER_LINUX32

PER_LINUX32_3GB

PER_LINUX_32BIT

PER_LINUX_FDPIC

PER_MASK

PER_OSF4

OSF/1 v4

PER_OSR5

PER_RISCOS

PER_SCOSVR3

PER_SOLARIS

PER_SUNOS

PER_SVR3

PER_SVR4

PER_UW7

PER_WYSEV386

PER_XENIX

PF_ALG

PF_APPLETALK

PF_ASH

PF_ATMPVC

PF_ATMSVC

PF_AX25

PF_BLUETOOTH

PF_BRIDGE

PF_CAIF

PF_CAN

PF_DECNET

PF_ECONET

PF_IB

PF_IEEE802154

PF_INET

PF_INET6

PF_IPX

PF_IRDA

PF_ISDN

PF_IUCV

PF_KCM

PF_KEY

PF_LLC

PF_LOCAL

PF_MAX

PF_MPLS

PF_NETBEUI

PF_NETLINK

PF_NETROM

PF_NFC

PF_PACKET

PF_PHONET

PF_PPPOX

PF_QIPCRTR

PF_RDS

PF_ROSE

PF_ROUTE

PF_RXRPC

PF_SECURITY

PF_SMC

PF_SNA

PF_TIPC

PF_UNIX

PF_UNSPEC

Protocol families, same as address families.

PF_VSOCK

PF_WANPIPE

PF_X25

PF_XDP

PIDFD_NONBLOCK

Flags for pidfd_open().

PIDFD_SIGNAL_PROCESS_GROUP

PIDFD_SIGNAL_THREAD

Flags for pidfd_send_signal().

PIDFD_SIGNAL_THREAD_GROUP

PIDFD_THREAD

PID_NS_INDEX

PIPE_BUF

bytes in atomic write to a pipe

PIT_TICK_RATE

The clock frequency of the i8253/i8254 PIT

PKEY_ACCESS_MASK

PKEY_DISABLE_ACCESS

PKEY_DISABLE_WRITE

POLLERR

POLLFREE

currently only for epoll

POLLHUP

POLLIN

These are specified by iBCS2

POLLMSG

POLLNVAL

POLLOUT

POLLPRI

POLLRDBAND

POLLRDHUP

POLLRDNORM

The rest seem to be more-or-less nonstandard. Check them!

POLLREMOVE

POLLWRBAND

POLLWRNORM

POLL_BUSY_LOOP

POLL_ERR

i/o error

POLL_HUP

device disconnected

POLL_IN

SIGPOLL (or any other signal without signal specific si_codes) si_codes data input available

POLL_MSG

input message available

POLL_OUT

output buffers available

POLL_PRI

high priority input available

PORT_16C950

Oxford Semiconductor

PORT_8250

PORT_16450

PORT_16550

PORT_16650

PORT_16654

PORT_16750

PORT_16850

PORT_16550A

PORT_16650V2

PORT_CIRRUS

usurped by cyclades.c

PORT_MAX

PORT_RSA

RSA-DV II/S card

PORT_STARTECH

usurped by cyclades.c

PORT_UNKNOWN

These are the supported serial types.

POSIX_FADV_DONTNEED

Don’t need these pages.

POSIX_FADV_NOREUSE

Data will be accessed once.

POSIX_FADV_NORMAL

No further special treatment.

POSIX_FADV_RANDOM

Expect random page references.

POSIX_FADV_SEQUENTIAL

Expect sequential page references.

POSIX_FADV_WILLNEED

Will need these pages.

PPM_SCALE_INV_SHIFT

PRIO_MAX

PRIO_MIN

PRIO_PGRP

PRIO_PROCESS

PRIO_USER

PRJQUOTA

element used for project quotas

PROT_EXEC

page can be executed

PROT_GROWSDOWN

mprotect flag: extend change to start of growsdown vma

PROT_GROWSUP

mprotect flag: extend change to end of growsup vma

PROT_NONE

0x10 reserved for arch-specific use 0x20 reserved for arch-specific use page can not be accessed

PROT_READ

page can be read

PROT_SEM

page may be used for atomic ops

PROT_WRITE

page can be written

PR_CAPBSET_DROP

PR_CAPBSET_READ

Get/set the capability bounding set (as per security/commoncap.c)

PR_CAP_AMBIENT

Control the ambient capability set

PR_CAP_AMBIENT_CLEAR_ALL

PR_CAP_AMBIENT_IS_SET

PR_CAP_AMBIENT_LOWER

PR_CAP_AMBIENT_RAISE

PR_ENDIAN_BIG

PR_ENDIAN_LITTLE

True little endian mode

PR_ENDIAN_PPC_LITTLE

PowerPC pseudo little endian

PR_FPEMU_NOPRINT

silently emulate fp operations accesses

PR_FPEMU_SIGFPE

don’t emulate fp operations, send SIGFPE instead

PR_FP_EXC_ASYNC

async recoverable exception mode

PR_FP_EXC_DISABLED

FP exceptions disabled

PR_FP_EXC_DIV

floating point divide by zero

PR_FP_EXC_INV

floating point invalid operation

PR_FP_EXC_NONRECOV

async non-recoverable exc. mode

PR_FP_EXC_OVF

floating point overflow

PR_FP_EXC_PRECISE

precise exception mode

PR_FP_EXC_RES

floating point inexact result

PR_FP_EXC_SW_ENABLE

Use FPEXC for FP exception enables

PR_FP_EXC_UND

floating point underflow

PR_FP_MODE_FR

64b FP registers

PR_FP_MODE_FRE

32b compatibility

PR_GET_CHILD_SUBREAPER

PR_GET_DUMPABLE

Get/set current->mm->dumpable

PR_GET_ENDIAN

Get/set process endian

PR_GET_FPEMU

Get/set floating-point emulation control bits (if meaningful)

PR_GET_FPEXC

Get/set floating-point exception mode (if meaningful)

PR_GET_FP_MODE

PR_GET_IO_FLUSHER

PR_GET_KEEPCAPS

Get/set whether or not to drop capabilities on setuid() away from uid 0 (as per security/commoncap.c)

PR_GET_NAME

Get process name

PR_GET_NO_NEW_PRIVS

PR_GET_PDEATHSIG

Second arg is a ptr to return the signal

PR_GET_SECCOMP

Get/set process seccomp mode

PR_GET_SECUREBITS

Get/set securebits (as per security/commoncap.c)

PR_GET_SPECULATION_CTRL

Per task speculation control

PR_GET_TAGGED_ADDR_CTRL

PR_GET_THP_DISABLE

PR_GET_TID_ADDRESS

PR_GET_TIMERSLACK

PR_GET_TIMING

Get/set whether we use statistical process timing or accurate timestamp based process timing

PR_GET_TSC

Get/set the process’ ability to use the timestamp counter instruction

PR_GET_UNALIGN

Get/set unaligned access control bits (if meaningful)

PR_MCE_KILL

Set early/late kill mode for hwpoison memory corruption. This influences when the process gets killed on a memory corruption.

PR_MCE_KILL_CLEAR

PR_MCE_KILL_DEFAULT

PR_MCE_KILL_EARLY

PR_MCE_KILL_GET

PR_MCE_KILL_LATE

PR_MCE_KILL_SET

PR_MPX_DISABLE_MANAGEMENT

PR_MPX_ENABLE_MANAGEMENT

No longer implemented, but left here to ensure the numbers stay reserved:

PR_PAC_APDAKEY

PR_PAC_APDBKEY

PR_PAC_APGAKEY

PR_PAC_APIAKEY

PR_PAC_APIBKEY

PR_PAC_RESET_KEYS

Reset arm64 pointer authentication keys

PR_SET_CHILD_SUBREAPER

PR_SET_DUMPABLE

PR_SET_ENDIAN

PR_SET_FPEMU

PR_SET_FPEXC

PR_SET_FP_MODE

PR_SET_IO_FLUSHER

Control reclaim behavior when allocating memory

PR_SET_KEEPCAPS

PR_SET_MM

Tune up process memory map specifics.

PR_SET_MM_ARG_END

PR_SET_MM_ARG_START

PR_SET_MM_AUXV

PR_SET_MM_BRK

PR_SET_MM_END_CODE

PR_SET_MM_END_DATA

PR_SET_MM_ENV_END

PR_SET_MM_ENV_START

PR_SET_MM_EXE_FILE

PR_SET_MM_MAP

PR_SET_MM_MAP_SIZE

PR_SET_MM_START_BRK

PR_SET_MM_START_CODE

PR_SET_MM_START_DATA

PR_SET_MM_START_STACK

PR_SET_NAME

Set process name

PR_SET_NO_NEW_PRIVS

If no_new_privs is set, then operations that grant new privileges (i.e. execve) will either fail or not grant them. This affects suid/sgid, file capabilities, and LSMs.

PR_SET_PDEATHSIG

Values to pass as first argument to prctl() Second arg is a signal

PR_SET_PTRACER

Set specific pid that is allowed to ptrace the current task. A value of 0 mean “no process”.

PR_SET_PTRACER_ANY

PR_SET_SECCOMP

PR_SET_SECUREBITS

PR_SET_SPECULATION_CTRL

PR_SET_TAGGED_ADDR_CTRL

Tagged user address controls for arm64

PR_SET_THP_DISABLE

PR_SET_TIMERSLACK

Get/set the timerslack as used by poll/select/nanosleep A value of 0 means “use default”

PR_SET_TIMING

PR_SET_TSC

PR_SET_UNALIGN

PR_SPEC_DISABLE

PR_SPEC_DISABLE_NOEXEC

PR_SPEC_ENABLE

PR_SPEC_FORCE_DISABLE

PR_SPEC_INDIRECT_BRANCH

PR_SPEC_NOT_AFFECTED

Return and control values for PR_SET/GET_SPECULATION_CTRL

PR_SPEC_PRCTL

PR_SPEC_STORE_BYPASS

Speculation control variants

PR_SVE_GET_VL

get task vector length

PR_SVE_SET_VL

arm64 Scalable Vector Extension controls Flag values must be kept in sync with ptrace NT_ARM_SVE interface set task vector length

PR_SVE_SET_VL_ONEXEC

defer effect until exec

PR_SVE_VL_INHERIT

inherit across exec

PR_SVE_VL_LEN_MASK

Bits common to PR_SVE_SET_VL and PR_SVE_GET_VL

PR_TAGGED_ADDR_ENABLE

PR_TASK_PERF_EVENTS_DISABLE

PR_TASK_PERF_EVENTS_ENABLE

PR_TIMING_STATISTICAL

Normal, traditional, statistical process timing

PR_TIMING_TIMESTAMP

Accurate timestamp based process timing

PR_TSC_ENABLE

allow the use of the timestamp counter

PR_TSC_SIGSEGV

throw a SIGSEGV instead of reading the TSC

PR_UNALIGN_NOPRINT

silently fix up unaligned user accesses

PR_UNALIGN_SIGBUS

generate SIGBUS on unaligned user access

PTRACE_ARCH_PRCTL

PTRACE_ATTACH

PTRACE_CONT

PTRACE_DETACH

PTRACE_EVENTMSG_SYSCALL_ENTRY

These values are stored in task->ptrace_message by tracehook_report_syscall_* to describe the current syscall-stop.

PTRACE_EVENTMSG_SYSCALL_EXIT

PTRACE_EVENT_CLONE

PTRACE_EVENT_EXEC

PTRACE_EVENT_EXIT

PTRACE_EVENT_FORK

Wait extended result codes for the above trace options.

PTRACE_EVENT_SECCOMP

PTRACE_EVENT_STOP

Extended result codes which enabled by means other than options.

PTRACE_EVENT_VFORK

PTRACE_EVENT_VFORK_DONE

PTRACE_GETEVENTMSG

PTRACE_GETFPREGS

PTRACE_GETFPXREGS

PTRACE_GETREGS

Arbitrarily choose the same ptrace numbers as used by the Sparc code.

PTRACE_GETREGSET

Generic ptrace interface that exports the architecture specific regsets using the corresponding NT_* types (which are also used in the core dump).

PTRACE_GETSIGINFO

PTRACE_GETSIGMASK

PTRACE_GET_SYSCALL_INFO

PTRACE_GET_THREAD_AREA

only useful for access 32bit programs / kernels

PTRACE_INTERRUPT

PTRACE_KILL

PTRACE_LISTEN

PTRACE_OLDSETOPTIONS

PTRACE_O_EXITKILL

eventless options

PTRACE_O_MASK

PTRACE_O_SUSPEND_SECCOMP

PTRACE_O_TRACECLONE

PTRACE_O_TRACEEXEC

PTRACE_O_TRACEEXIT

PTRACE_O_TRACEFORK

PTRACE_O_TRACESECCOMP

PTRACE_O_TRACESYSGOOD

Options set using PTRACE_SETOPTIONS or using PTRACE_SEIZE @data param

PTRACE_O_TRACEVFORK

PTRACE_O_TRACEVFORKDONE

PTRACE_PEEKDATA

PTRACE_PEEKSIGINFO

PTRACE_PEEKSIGINFO_SHARED

Read signals from a shared (process wide) queue

PTRACE_PEEKTEXT

PTRACE_PEEKUSR

PTRACE_POKEDATA

PTRACE_POKETEXT

PTRACE_POKEUSR

PTRACE_SECCOMP_GET_FILTER

PTRACE_SECCOMP_GET_METADATA

PTRACE_SEIZE

PTRACE_SETFPREGS

PTRACE_SETFPXREGS

PTRACE_SETOPTIONS

0x4200-0x4300 are reserved for architecture-independent additions.

PTRACE_SETREGS

PTRACE_SETREGSET

PTRACE_SETSIGINFO

PTRACE_SETSIGMASK

PTRACE_SET_THREAD_AREA

PTRACE_SINGLEBLOCK

resume execution until next branch

PTRACE_SINGLESTEP

PTRACE_SYSCALL

PTRACE_SYSCALL_INFO_ENTRY

PTRACE_SYSCALL_INFO_EXIT

PTRACE_SYSCALL_INFO_NONE

PTRACE_SYSCALL_INFO_SECCOMP

PTRACE_SYSEMU

PTRACE_SYSEMU_SINGLESTEP

PTRACE_TRACEME

PTY_MAX

/proc/sys/kernel/pty

PTY_NR

P_ALL

First argument to waitid:

P_PGID

P_PID

P_PIDFD

QFMT_OCFS2

QFMT_VFS_OLD

Quota format type IDs

QFMT_VFS_V0

QFMT_VFS_V1

QIF_ALL

QIF_BLIMITS

QIF_BLIMITS_B

Quota structure used for communication with userspace via quotactl Following flags are used to specify which fields are valid

QIF_BTIME

QIF_BTIME_B

QIF_DQBLKSIZE

QIF_DQBLKSIZE_BITS

Size of block in which space limits are passed through the quota interface

QIF_ILIMITS

QIF_ILIMITS_B

QIF_INODES

QIF_INODES_B

QIF_ITIME

QIF_ITIME_B

QIF_LIMITS

QIF_SPACE

QIF_SPACE_B

QIF_TIMES

QIF_USAGE

QTYPE_MASK_GRP

QTYPE_MASK_PRJ

QTYPE_MASK_USR

Masks for quota types when used as a bitmask

QUOTA_NL_A_CAUSED_ID

QUOTA_NL_A_DEV_MAJOR

QUOTA_NL_A_DEV_MINOR

QUOTA_NL_A_EXCESS_ID

QUOTA_NL_A_MAX

QUOTA_NL_A_PAD

QUOTA_NL_A_QTYPE

QUOTA_NL_A_UNSPEC

QUOTA_NL_A_WARNING

QUOTA_NL_BHARDBELOW

Usage got below block hardlimit

QUOTA_NL_BHARDWARN

Block hardlimit reached

QUOTA_NL_BSOFTBELOW

Usage got below block softlimit

QUOTA_NL_BSOFTLONGWARN

Block grace time expired

QUOTA_NL_BSOFTWARN

Block softlimit reached

QUOTA_NL_C_MAX

QUOTA_NL_C_UNSPEC

QUOTA_NL_C_WARNING

QUOTA_NL_IHARDBELOW

Usage got below inode hardlimit

QUOTA_NL_IHARDWARN

Inode hardlimit reached

QUOTA_NL_ISOFTBELOW

Usage got below inode softlimit

QUOTA_NL_ISOFTLONGWARN

Inode grace time expired

QUOTA_NL_ISOFTWARN

Inode softlimit reached

QUOTA_NL_NOWARN

Definitions for quota netlink interface

Q_GETFMT

get quota format used on given filesystem

Q_GETINFO

get information about quota files

Q_GETNEXTQUOTA

get disk limits and usage >= ID

Q_GETQUOTA

get user quota structure

Q_QUOTAOFF

turn quotas off

Q_QUOTAON

turn quotas on

Q_SETINFO

set information about quota files

Q_SETQUOTA

set user quota structure

Q_SYNC

sync disk copy of a filesystems quotas

R8

R9

R10

R11

These regs are callee-clobbered. Always saved on kernel entry.

R12

R13

R14

R15

C ABI says these regs are callee-preserved. They aren’t saved on kernel entry unless syscall needs a complete, fully filled struct pt_regs.

RANDOM_BOOT_ID

RANDOM_ENTROPY_COUNT

RANDOM_POOLSIZE

/proc/sys/kernel/random

RANDOM_READ_THRESH

RANDOM_UUID

RANDOM_WRITE_THRESH

RAX

RBP

RBX

RCX

RDI

RDX

READ_IMPLIES_EXEC

RENAME_EXCHANGE

Exchange source and dest

RENAME_NOREPLACE

Don’t overwrite target

RENAME_WHITEOUT

Whiteout source

RESOLVE_BENEATH

Block “lexical” trickery like “..”, symlinks, and absolute paths which escape the dirfd.

RESOLVE_CACHED

Only complete if resolution can be completed through cached lookup.

RESOLVE_IN_ROOT

Make all jumps to “/” and “..” be scoped inside the dirfd (similar to chroot(2)).

RESOLVE_NO_MAGICLINKS

Block traversal through procfs-style “magic-links”.

RESOLVE_NO_SYMLINKS

Block traversal through all symlinks (implies OEXT_NO_MAGICLINKS)

RESOLVE_NO_XDEV

how->resolve flags for openat2(2).

RIP

Return frame for iretq

RLIM64_INFINITY

RLIMIT_AS

address space limit

RLIMIT_CORE

max core file size

RLIMIT_CPU

Resource limit IDs

RLIMIT_DATA

max data size

RLIMIT_FSIZE

Maximum filesize

RLIMIT_LOCKS

maximum file locks held

RLIMIT_MEMLOCK

max locked-in-memory address space

RLIMIT_MSGQUEUE

maximum bytes in POSIX mqueues

RLIMIT_NICE

max nice prio allowed to raise to 0-39 for nice level 19 .. -20

RLIMIT_NOFILE

max number of open files

RLIMIT_NPROC

max number of processes

RLIMIT_RSS

max resident set size

RLIMIT_RTPRIO

maximum realtime priority

RLIMIT_RTTIME

timeout for RT tasks in us

RLIMIT_SIGPENDING

max number of pending signals

RLIMIT_STACK

max stack size

RLIM_INFINITY

SuS says limits have to be unsigned. Which makes a ton more sense anyway.

RLIM_NLIMITS

ROBUST_LIST_LIMIT

This limit protects against a deliberately circular list. (Not worth introducing an rlimit for it)

RSEQ_CPU_ID_REGISTRATION_FAILED

RSEQ_CPU_ID_UNINITIALIZED

RSEQ_CS_FLAG_NO_RESTART_ON_MIGRATE

RSEQ_CS_FLAG_NO_RESTART_ON_MIGRATE_BIT

RSEQ_CS_FLAG_NO_RESTART_ON_PREEMPT

RSEQ_CS_FLAG_NO_RESTART_ON_PREEMPT_BIT

RSEQ_CS_FLAG_NO_RESTART_ON_SIGNAL

RSEQ_CS_FLAG_NO_RESTART_ON_SIGNAL_BIT

RSEQ_FLAG_UNREGISTER

RSI

RSP

RTSIG_MAX

RUSAGE_BOTH

sys_wait4() uses this

RUSAGE_CHILDREN

RUSAGE_SELF

Resource control/accounting header file for linux Definition of struct rusage taken from BSD 4.3 Reno

RUSAGE_THREAD

only the calling thread

RWF_APPEND

per-IO O_APPEND

RWF_DSYNC

per-IO O_DSYNC

RWF_HIPRI

high priority request, poll if possible

RWF_NOWAIT

per-IO, return -EAGAIN if operation would block

RWF_SUPPORTED

mask of flags supported by the kernel

RWF_SYNC

per-IO O_SYNC

RWF_WRITE_LIFE_NOT_SET

(1U << 31) is reserved for signed error codes

RWH_WRITE_LIFE_EXTREME

RWH_WRITE_LIFE_LONG

RWH_WRITE_LIFE_MEDIUM

RWH_WRITE_LIFE_NONE

RWH_WRITE_LIFE_SHORT

R_OK

Check file is readable.

SA_EXPOSE_TAGBITS

SA_IA32_ABI

non-uapi in-kernel SA_FLAGS for those indicates ABI for a signal frame.

SA_NOCLDSTOP

SA_FLAGS values:

SA_NOCLDWAIT

SA_NODEFER

SA_NOMASK

SA_ONESHOT

SA_ONSTACK

SA_RESETHAND

SA_RESTART

SA_RESTORER

SA_SIGINFO

SA_UNSUPPORTED

SA_X32_ABI

SCHED_ATTR_SIZE_VER0

sizeof first published struct

SCHED_ATTR_SIZE_VER1

add: util_{min,max}

SCHED_BATCH

SCHED_DEADLINE

SCHED_FIFO

SCHED_FLAG_ALL

SCHED_FLAG_DL_OVERRUN

SCHED_FLAG_RECLAIM

SCHED_FLAG_RESET_ON_FORK

For the sched_{set,get}attr() calls

SCHED_IDLE

SCHED_ISO: reserved but not implemented yet

SCHED_NORMAL

Scheduling policies

SCHED_RESET_ON_FORK

Can be ORed in to make sure the process is reverted back to SCHED_NORMAL on fork

SCHED_RR

SCM_CREDENTIALS

rw: struct ucred

SCM_RIGHTS

Ancillary data object information MACROS Table 5-14 of POSIX 1003.1g “Socket”-level control message types: rw: access rights (array of int)

SCM_SECURITY

rw: security label

SCM_TIMESTAMP

SCM_TIMESTAMPING

SCM_TIMESTAMPING_OPT_STATS

SCM_TIMESTAMPING_PKTINFO

SCM_TIMESTAMPNS

SCM_TXTIME

SCM_WIFI_STATUS

SECCOMP_FILTER_FLAG_LOG

SECCOMP_FILTER_FLAG_NEW_LISTENER

SECCOMP_FILTER_FLAG_SPEC_ALLOW

SECCOMP_FILTER_FLAG_TSYNC

Valid flags for SECCOMP_SET_MODE_FILTER

SECCOMP_GET_ACTION_AVAIL

SECCOMP_GET_NOTIF_SIZES

SECCOMP_IOCTL_NOTIF_ID_VALID

SECCOMP_IOCTL_NOTIF_RECV

Flags for seccomp notification fd ioctl.

SECCOMP_IOCTL_NOTIF_SEND

SECCOMP_IOC_MAGIC

SECCOMP_MODE_DISABLED

Valid values for seccomp.mode and prctl(PR_SET_SECCOMP, <mode>) seccomp is not in use.

SECCOMP_MODE_FILTER

uses user-supplied filter.

SECCOMP_MODE_STRICT

uses hard-coded filter.

SECCOMP_RET_ACTION

SECCOMP_RET_ACTION_FULL

Masks for the return value sections.

SECCOMP_RET_ALLOW

allow

SECCOMP_RET_DATA

SECCOMP_RET_ERRNO

returns an errno

SECCOMP_RET_KILL

SECCOMP_RET_KILL_PROCESS

All BPF programs must return a 32-bit value.

SECCOMP_RET_KILL_THREAD

kill the thread

SECCOMP_RET_LOG

allow after logging

SECCOMP_RET_TRACE

pass to a tracer or disallow

SECCOMP_RET_TRAP

disallow and force a SIGSYS

SECCOMP_RET_USER_NOTIF

notifies userspace

SECCOMP_SET_MODE_FILTER

SECCOMP_SET_MODE_STRICT

Valid operations for seccomp syscall.

SEEK_CUR

seek relative to current file position

SEEK_DATA

seek to the next data

SEEK_END

seek relative to end of file

SEEK_HOLE

seek to the next hole

SEEK_MAX

SEEK_SET

seek relative to beginning of file

SEGV_ACCADI

ADI not enabled for mapped object

SEGV_ACCERR

invalid permissions for mapped object

SEGV_ADIDERR

Disrupting MCD error

SEGV_ADIPERR

Precise MCD exception

SEGV_BNDERR

failed address bound checks

SEGV_MAPERR

SIGSEGV si_codes address not mapped to object

SEGV_PKUERR

failed protection key checks

SEMAEM

adjust on exit max value

SEMCTL

SEMGET

SEMMAP

of entries in semaphore map

SEMMNI

SEMMNI, SEMMSL and SEMMNS are default values which can be modified by sysctl. The values has been chosen to be larger than necessary for any known configuration.

SEMMNS

<= INT_MAX max # of semaphores in system

SEMMNU

num of undo structures system wide

SEMMSL

<= INT_MAX max num of semaphores per id

SEMOP

SEMOPM

<= 1 000 max num of ops per semop call

SEMTIMEDOP

SEMUME

unused max num of undo entries per process

SEMUSZ

sizeof struct sem_undo

SEMVMX

<= 32767 semaphore maximum value

SEM_INFO

SEM_STAT

ipcs ctl cmds

SEM_STAT_ANY

SEM_UNDO

semop flags undo the operation on exit

SERIAL_IO_AU

SERIAL_IO_HUB6

SERIAL_IO_MEM

SERIAL_IO_MEM16

SERIAL_IO_MEM32

SERIAL_IO_MEM32BE

SERIAL_IO_PORT

SERIAL_IO_TSI

SER_ISO7816_ENABLED

SER_ISO7816_T_PARAM

SER_RS485_ENABLED

If enabled

SER_RS485_RTS_AFTER_SEND

Logical level for RTS pin after sent

SER_RS485_RTS_ON_SEND

Logical level for RTS pin when sending

SER_RS485_RX_DURING_TX

SER_RS485_TERMINATE_BUS

Enable bus termination (if supported)

SETALL

set all semval’s

SETVAL

set semval

SHIFT_USEC

SHIFT_USEC defines the scaling (shift) of the time_freq and time_tolerance variables, which represent the current frequency offset and maximum frequency tolerance. frequency offset scale (shift)

SHMALL

max shm system wide (pages)

SHMAT

SHMCTL

SHMDT

SHMGET

SHMMAX

max shared seg size (bytes)

SHMMIN

SHMMNI, SHMMAX and SHMALL are default upper limits which can be modified by sysctl.

SHMMNI

max num of segs system wide

SHMSEG

max shared segs per process

SHM_EXEC

execution access

SHM_HUGETLB

Bits 9 & 10 are IPC_CREAT and IPC_EXCL segment will use huge TLB pages

SHM_HUGE_1GB

SHM_HUGE_1MB

SHM_HUGE_2GB

SHM_HUGE_2MB

SHM_HUGE_8MB

SHM_HUGE_16GB

SHM_HUGE_16MB

SHM_HUGE_32MB

SHM_HUGE_64KB

SHM_HUGE_256MB

SHM_HUGE_512KB

SHM_HUGE_512MB

SHM_HUGE_MASK

SHM_HUGE_SHIFT

Huge page size encoding when SHM_HUGETLB is specified, and a huge page size other than the default is desired. See hugetlb_encode.h

SHM_INFO

SHM_LOCK

super user shmctl commands

SHM_NORESERVE

don’t check for reservations

SHM_R

shmget() shmflg values. The bottom nine bits are the same as open(2) mode flags or S_IRUGO from <linux/stat.h>

SHM_RDONLY

shmat() shmflg values read-only access

SHM_REMAP

take-over region on attach

SHM_RND

round attach address to SHMLBA boundary

SHM_STAT

ipcs ctl commands

SHM_STAT_ANY

SHM_UNLOCK

SHM_W

or S_IWUGO from <linux/stat.h>

SHORT_INODE

SHUT_RD

enum sock_shutdown_cmd - Shutdown types:

SHUT_RDWR

Shutdown receptions/transmissions

SHUT_WR

Shutdown transmissions

SIGABRT

SIGALRM

SIGBUS

SIGCHLD

SIGCONT

SIGEV_MAX_SIZE

SIGEV_NONE

other notification: meaningless

SIGEV_PAD_SIZE

SIGEV_SIGNAL

sigevent definitions

SIGEV_THREAD

deliver via thread creation

SIGEV_THREAD_ID

deliver to thread

SIGFPE

SIGHUP

SIGILL

SIGINT

SIGIO

SIGIOT

SIGKILL

SIGPIPE

SIGPOLL

SIGPROF

SIGPWR

SIGQUIT

SIGRTMAX

SIGRTMIN

These should not be considered constants from userland.

SIGSEGV

SIGSTKFLT

SIGSTKSZ

SIGSTOP

SIGSYS

SIGTERM

SIGTRAP

SIGTSTP

SIGTTIN

SIGTTOU

SIGUNUSED

SIGURG

SIGUSR1

SIGUSR2

SIGVTALRM

SIGWINCH

SIGXCPU

SIGXFSZ

SIG_BLOCK

for blocking signals

SIG_DFL

default signal handling

SIG_ERR

error return from signal

SIG_IGN

ignore signal

SIG_SETMASK

for setting the signal mask

SIG_UNBLOCK

for unblocking signals

SIOCATMARK

SIOCGPGRP

SIOCGSTAMP

Get stamp (timeval)

SIOCGSTAMPNS

Get stamp (timespec)

SIOCSPGRP

SI_ASYNCIO

sent by AIO completion

SI_ASYNCNL

sent by glibc async name lookup completion

SI_DETHREAD

sent by execve() killing subsidiary threads

SI_KERNEL

sent by the kernel from somewhere

SI_LOAD_SHIFT

SI_MAX_SIZE

SI_MESGQ

sent by real time mesq state change

SI_QUEUE

sent by sigqueue

SI_SIGIO

sent by queued SIGIO

SI_TIMER

sent by timer expiration

SI_TKILL

sent by tkill system call

SI_USER

How these fields are to be accessed. si_code values Digital reserves positive values for kernel-generated signals. sent by kill, sigsend, raise

SK_DROP

SK_PASS

SOCKWQ_ASYNC_NOSPACE

Historically, SOCKWQ_ASYNC_NOSPACE & SOCKWQ_ASYNC_WAITDATA were located in sock->flags, but moved into sk->sk_wq->flags to be RCU protected. Eventually all flags will be in sk->sk_wq->flags.

SOCKWQ_ASYNC_WAITDATA

SOCK_CLOEXEC

Flags for socket, socketpair, accept4

SOCK_DCCP

Datagram Congestion Control Protocol socket

SOCK_DGRAM

Datagram (conn.less) socket

SOCK_MAX

SOCK_NONBLOCK

SOCK_NOSPACE

SOCK_PACKET

Linux specific way of getting packets at the dev level.

SOCK_PASSCRED

SOCK_PASSSEC

SOCK_RAW

Raw socket

SOCK_RDM

Reliably-delivered message

SOCK_SEQPACKET

sequential packet socket

SOCK_SIZE

Structure describing an Internet (IP) socket address. sizeof(struct sockaddr)

SOCK_STREAM

enum sock_type - Socket types For writing rarp and other similar things on the user level.

SOCK_TYPE_MASK

Mask which covers at least up to SOCK_MASK - 1. The remaining bits are used as flags.

SOCK_WAKE_IO

SOCK_WAKE_SPACE

SOCK_WAKE_URG

SOCK_WAKE_WAITD

SOL_AAL

ATM Adaption Layer (packet level)

SOL_ALG

SOL_ATALK

SOL_ATM

ATM layer (cell level)

SOL_AX25

SOL_BLUETOOTH

SOL_CAIF

SOL_DCCP

SOL_DECNET

SOL_ICMPV6

SOL_IP

setsockoptions(2) level. Thanks to BSD these must match IPPROTO_xxx

SOL_IPV6

SOL_IPX

SOL_IRDA

SOL_IUCV

SOL_KCM

SOL_LLC

SOL_NETBEUI

SOL_NETLINK

SOL_NETROM

SOL_NFC

SOL_PACKET

SOL_PNPIPE

SOL_PPPOL2TP

SOL_RAW

SOL_RDS

SOL_ROSE

SOL_RXRPC

SOL_SCTP

SOL_SOCKET

For setsockopt(3)

SOL_TCP

#define SOL_ICMP 1 No-no-no! Due to Linux :-) we cannot use SOL_ICMP=1

SOL_TIPC

SOL_TLS

SOL_UDP

SOL_UDPLITE

UDP-Lite (RFC 3828)

SOL_X25

SOL_XDP

SOMAXCONN

Maximum queue length specifiable by listen.

SO_ACCEPTCONN

SO_ATTACH_BPF

SO_ATTACH_FILTER

Socket filtering

SO_ATTACH_REUSEPORT_CBPF

SO_ATTACH_REUSEPORT_EBPF

SO_BINDTODEVICE

SO_BINDTOIFINDEX

SO_BPF_EXTENSIONS

SO_BROADCAST

SO_BSDCOMPAT

SO_BUSY_POLL

SO_CNX_ADVICE

SO_COOKIE

SO_DEBUG

SO_DETACH_BPF

SO_DETACH_FILTER

SO_DOMAIN

SO_DONTROUTE

SO_ERROR

SO_GET_FILTER

SO_INCOMING_CPU

SO_INCOMING_NAPI_ID

SO_KEEPALIVE

SO_LINGER

SO_LOCK_FILTER

SO_MARK

SO_MAX_PACING_RATE

SO_MEMINFO

SO_NOFCS

Instruct lower device to use last 4-bytes of skb data as FCS

SO_NO_CHECK

SO_OOBINLINE

SO_PASSCRED

powerpc only differs in these

SO_PASSSEC

SO_PEEK_OFF

SO_PEERCRED

SO_PEERGROUPS

SO_PEERNAME

SO_PEERSEC

SO_PRIORITY

SO_PROTOCOL

SO_RCVBUF

SO_RCVBUFFORCE

SO_RCVLOWAT

SO_RCVTIMEO

SO_RCVTIMEO_NEW

SO_RCVTIMEO_OLD

SO_REUSEADDR

SO_REUSEPORT

SO_RXQ_OVFL

SO_SECURITY_AUTHENTICATION

Security levels - as per NRL IPv6 - don’t actually do anything

SO_SECURITY_ENCRYPTION_NETWORK

SO_SECURITY_ENCRYPTION_TRANSPORT

SO_SELECT_ERR_QUEUE

SO_SNDBUF

SO_SNDBUFFORCE

SO_SNDLOWAT

SO_SNDTIMEO

SO_SNDTIMEO_NEW

SO_SNDTIMEO_OLD

SO_TIMESTAMP

on 64-bit and x32, avoid the ?: operator

SO_TIMESTAMPING

SO_TIMESTAMPING_NEW

SO_TIMESTAMPING_OLD

SO_TIMESTAMPNS

SO_TIMESTAMPNS_NEW

SO_TIMESTAMPNS_OLD

SO_TIMESTAMP_NEW

SO_TIMESTAMP_OLD

SO_TXTIME

SO_TYPE

SO_WIFI_STATUS

SO_ZEROCOPY

SPLICE_F_ALL

SPLICE_F_FD_IN_FIXED

sqe->splice_flags

SPLICE_F_GIFT

pages passed in are a gift

SPLICE_F_MORE

expect more data

SPLICE_F_MOVE

Flags passed in from splice/tee/vmsplice move pages instead of copying

SPLICE_F_NONBLOCK

don’t block on the pipe splicing (but we may still block on the fd we splice from/to, of course

SS

SS_AUTODISARM

bit-flags disable sas during sighandling

SS_CONNECTED

connected to socket

SS_CONNECTING

in process of connecting

SS_DISABLE

SS_DISCONNECTING

in process of disconnecting

SS_FLAG_BITS

mask for all SS_xxx flags

SS_FREE

not allocated

SS_ONSTACK

SS_UNCONNECTED

unconnected to any socket

STATMOUNT_FS_TYPE

Want/got fs_type

STATMOUNT_MNT_BASIC

Want/got mnt_…

STATMOUNT_MNT_POINT

Want/got mnt_point

STATMOUNT_MNT_ROOT

Want/got mnt_root

STATMOUNT_PROPAGATE_FROM

Want/got propagate_from

STATMOUNT_SB_BASIC

mask bits for statmount(2) Want/got sb_…

STATX_ALL

All currently supported flags

STATX_ATIME

Want/got stx_atime

STATX_ATTR_APPEND

I File is append-only

STATX_ATTR_AUTOMOUNT

Dir: Automount trigger

STATX_ATTR_COMPRESSED

Attributes to be found in stx_attributes and masked in stx_attributes_mask.

STATX_ATTR_ENCRYPTED

I File requires key to decrypt in fs

STATX_ATTR_IMMUTABLE

I File is marked immutable

STATX_ATTR_NODUMP

I File is not to be dumped

STATX_BASIC_STATS

The stuff in the normal stat struct

STATX_BLOCKS

Want/got stx_blocks

STATX_BTIME

Want/got stx_btime

STATX_CTIME

Want/got stx_ctime

STATX_GID

Want/got stx_gid

STATX_INO

Want/got stx_ino

STATX_MODE

Want/got stx_mode & ~S_IFMT

STATX_MTIME

Want/got stx_mtime

STATX_NLINK

Want/got stx_nlink

STATX_SIZE

Want/got stx_size

STATX_TYPE

Flags to be stx_mask

STATX_UID

Want/got stx_uid

STATX__RESERVED

Reserved for future struct statx expansion

STA_CLK

clock source (0 = A, 1 = B) (ro)

STA_CLOCKERR

clock hardware fault (ro)

STA_DEL

delete leap (rw)

STA_FLL

select frequency-lock mode (rw)

STA_FREQHOLD

hold frequency (rw)

STA_INS

insert leap (rw)

STA_MODE

mode (0 = PLL, 1 = FLL) (ro)

STA_NANO

resolution (0 = us, 1 = ns) (ro)

STA_PLL

Status codes (timex.status) enable PLL updates (rw)

STA_PPSERROR

PPS signal calibration error (ro)

STA_PPSFREQ

enable PPS freq discipline (rw)

STA_PPSJITTER

PPS signal jitter exceeded (ro)

STA_PPSSIGNAL

PPS signal present (ro)

STA_PPSTIME

enable PPS time discipline (rw)

STA_PPSWANDER

PPS signal wander exceeded (ro)

STA_RONLY

read-only bits

STA_UNSYNC

clock unsynchronized (rw)

STICKY_TIMEOUTS

SUBCMDMASK

Command definitions for the ‘quotactl’ system call.

SUBCMDSHIFT

SWAP_ADDRESS_SPACE_PAGES

SWAP_ADDRESS_SPACE_SHIFT

One swap address space for each 64M swap space

SWAP_BATCH

SWAP_CLUSTER_MAX

SWAP_CONT_MAX

Special value in each swap_map continuation.

SWAP_FLAGS_VALID

SWAP_FLAG_DISCARD

enable discard for swap

SWAP_FLAG_DISCARD_ONCE

discard swap area at swapon-time

SWAP_FLAG_DISCARD_PAGES

discard page-clusters after use

SWAP_FLAG_PREFER

set if swap priority specified

SWAP_FLAG_PRIO_MASK

SWAP_FLAG_PRIO_SHIFT

SWAP_HAS_CACHE

Bit flag in swap_map.

SWAP_MAP_BAD

Note page is bad

SWAP_MAP_MAX

Special value in first swap_map.

SWAP_MAP_SHMEM

Owned by shmem/tmpfs

SYNC_FILE_RANGE_WAIT_AFTER

SYNC_FILE_RANGE_WAIT_BEFORE

SYNC_FILE_RANGE_WRITE

SYSLOG_ACTION_CLEAR

Clear ring buffer.

SYSLOG_ACTION_CLOSE

Close the log. Currently a NOP.

SYSLOG_ACTION_CONSOLE_LEVEL

Set level of messages printed to console

SYSLOG_ACTION_CONSOLE_OFF

Disable printk’s to console

SYSLOG_ACTION_CONSOLE_ON

Enable printk’s to console

SYSLOG_ACTION_OPEN

Open the log. Currently a NOP.

SYSLOG_ACTION_READ

Read from the log.

SYSLOG_ACTION_READ_ALL

Read all messages remaining in the ring buffer.

SYSLOG_ACTION_READ_CLEAR

Read and clear all messages remaining in the ring buffer

SYSLOG_ACTION_SIZE_BUFFER

Return size of the log buffer

SYSLOG_ACTION_SIZE_UNREAD

Return number of unread characters in the log buffer

SYSLOG_FROM_PROC

SYSLOG_FROM_READER

SYS_ACCEPT4_

sys_accept4(2)

SYS_ACCEPT_

sys_accept(2)

SYS_BIND_

sys_bind(2)

SYS_CONNECT_

sys_connect(2)

SYS_GETPEERNAME_

sys_getpeername(2)

SYS_GETSOCKNAME_

sys_getsockname(2)

SYS_GETSOCKOPT_

sys_getsockopt(2)

SYS_LISTEN_

sys_listen(2)

SYS_RECVFROM_

sys_recvfrom(2)

SYS_RECVMMSG_

sys_recvmmsg(2)

SYS_RECVMSG_

sys_recvmsg(2)

SYS_RECV_

sys_recv(2)

SYS_SECCOMP_

SIGSYS si_codes seccomp triggered Return from SYS_SECCOMP as it is already used by an syscall num.

SYS_SENDMMSG_

sys_sendmmsg(2)

SYS_SENDMSG_

sys_sendmsg(2)

SYS_SENDTO_

sys_sendto(2)

SYS_SEND_

sys_send(2)

SYS_SETSOCKOPT_

sys_setsockopt(2)

SYS_SHUTDOWN_

sys_shutdown(2)

SYS_SOCKETPAIR_

sys_socketpair(2)

SYS_SOCKET_

sys_socket(2)

S_DT_MASK

S_DT_SHIFT

struct dirent file types exposed to user via getdents(2), readdir(3)

S_IFBLK

S_IFCHR

S_IFDIR

S_IFIFO

S_IFLNK

S_IFMT

S_IFREG

S_IFSOCK

S_IRGRP

S_IROTH

S_IRUSR

S_IRWXG

S_IRWXO

S_IRWXU

S_ISGID

S_ISUID

S_ISVTX

S_IWGRP

S_IWOTH

S_IWUSR

S_IXGRP

S_IXOTH

S_IXUSR

TAB0

TAB1

TAB2

TAB3

TABDLY

TCFLSH

TCGETA

TCGETS

0x54 is just a magic number to make these relatively unique (‘T’)

TCGETS2

TCGETX

SYS5 TCGETX compatibility

TCIFLUSH

tcflush() QUEUE_SELECTOR argument and TCFLSH use these Discard data received but not yet read

TCIOFF

Send a STOP character

TCIOFLUSH

Discard all pending data

TCION

Send a START character

TCOFLUSH

Discard data written but not yet sent

TCOOFF

tcflow() ACTION argument and TCXONC use these Suspend output

TCOON

Restart suspended output

TCPI_OPT_ECN

ECN was negociated at TCP session init

TCPI_OPT_ECN_SEEN

we received at least one packet with ECT

TCPI_OPT_SACK

TCPI_OPT_SYN_DATA

SYN-ACK acked data in SYN sent or rcvd

TCPI_OPT_TIMESTAMPS

for TCP_INFO socket option

TCPI_OPT_WSCALE

TCP_BPF_IW

Set TCP initial congestion window

TCP_BPF_SNDCWND_CLAMP

Set sndcwnd_clamp

TCP_CC_INFO

Get Congestion Control (optional) info

TCP_CM_INQ

TCP_CONGESTION

Congestion control algorithm

TCP_CORK

Never send partially complete segments

TCP_DEFER_ACCEPT

Wake up listener only when data arrive

TCP_FASTOPEN

Enable FastOpen on listeners

TCP_FASTOPEN_CONNECT

Attempt FastOpen with connect

TCP_FASTOPEN_KEY

Set the key for Fast Open (cookie)

TCP_FASTOPEN_NO_COOKIE

Enable TFO without a TFO cookie

TCP_INFO

Information about this connection.

TCP_INQ

Notify bytes available to read as a cmsg on read

TCP_KEEPCNT

Number of keepalives before death

TCP_KEEPIDLE

Start keeplives after this period

TCP_KEEPINTVL

Interval between keepalives

TCP_LINGER2

Life time of orphaned FIN-WAIT-2 state

TCP_MAXSEG

Limit MSS

TCP_MD5SIG

TCP MD5 Signature (RFC2385)

TCP_MD5SIG_EXT

TCP MD5 Signature with extensions

TCP_MD5SIG_FLAG_IFINDEX

ifindex set

TCP_MD5SIG_FLAG_PREFIX

tcp_md5sig extension flags for TCP_MD5SIG_EXT address prefix length

TCP_MD5SIG_MAXKEYLEN

for TCP_MD5SIG socket option

TCP_MSS_DEFAULT

TCP general constants IPv4 (RFC1122, RFC2581)

TCP_MSS_DESIRED

IPv6 (tunneled), EDNS0 (RFC3226)

TCP_NODELAY

TCP socket options Turn off Nagle’s algorithm.

TCP_NOTSENT_LOWAT

limit number of unsent bytes in write queue

TCP_QUEUE_SEQ

TCP_QUICKACK

Block/reenable quick acks

TCP_REPAIR

TCP sock is under repair right now

TCP_REPAIR_OFF

TCP_REPAIR_OFF_NO_WP

Turn off without window probes

TCP_REPAIR_ON

TCP_REPAIR_OPTIONS

TCP_REPAIR_QUEUE

TCP_REPAIR_WINDOW

Get/set window parameters

TCP_SAVED_SYN

Get SYN headers recorded for connection

TCP_SAVE_SYN

Record SYN headers for new connections

TCP_SYNCNT

Number of SYN retransmits

TCP_THIN_DUPACK

Fast retrans. after 1 dupack

TCP_THIN_LINEAR_TIMEOUTS

Use linear timeouts for thin streams

TCP_TIMESTAMP

TCP_TX_DELAY

delay outgoing packets by XX usec

TCP_ULP

Attach a ULP to a TCP connection

TCP_USER_TIMEOUT

How long for loss retry before timeout

TCP_WINDOW_CLAMP

Bound advertised window

TCP_ZEROCOPY_RECEIVE

TCSADRAIN

TCSAFLUSH

TCSANOW

tcsetattr uses these

TCSBRK

TCSBRKP

Needed for POSIX tcsendbreak()

TCSETA

TCSETAF

TCSETAW

TCSETS

TCSETS2

TCSETSF

TCSETSF2

TCSETSW

TCSETSW2

TCSETX

TCSETXF

TCSETXW

TCXONC

TFD_CLOEXEC

TFD_NONBLOCK

TFD_TIMER_ABSTIME

CAREFUL: Check include/asm-generic/fcntl.h when defining new flags, since they might collide with O_* ones.

TFD_TIMER_CANCEL_ON_SET

TIME64_MAX

Located here for timespec[64]_valid_strict

TIME64_MIN

TIMER_ABSTIME

The various flags for setting POSIX.1b interval timers:

TIME_BAD

bw compat

TIME_DEL

delete leap second

TIME_ERROR

clock not synchronized

TIME_INS

insert leap second

TIME_OK

Clock states (time_state) clock synchronized, no leap second

TIME_OOP

leap second in progress

TIME_SETTOD_SEC_MAX

TIME_UPTIME_SEC_MAX

Limits for settimeofday():

TIME_WAIT

leap second has occurred

TIOCCBRK

BSD compatibility

TIOCCONS

TIOCEXCL

TIOCGDEV

Get primary device node of /dev/console

TIOCGETD

TIOCGEXCL

Get exclusive mode state

TIOCGICOUNT

read serial port inline interrupt counts

TIOCGISO7816

TIOCGLCKTRMIOS

TIOCGPGRP

TIOCGPKT

Get packet mode state

TIOCGPTLCK

Get Pty lock state

TIOCGPTN

Get Pty Number (of pty-mux device)

TIOCGPTPEER

Safely open the slave

TIOCGRS485

TIOCGSERIAL

TIOCGSID

Return the session ID of FD

TIOCGSOFTCAR

TIOCGWINSZ

TIOCINQ

TIOCLINUX

TIOCMBIC

TIOCMBIS

TIOCMGET

TIOCMIWAIT

wait for a change on serial input line(s)

TIOCMSET

TIOCM_CAR

TIOCM_CD

TIOCM_CTS

TIOCM_DSR

TIOCM_DTR

TIOCM_LE

modem lines

TIOCM_LOOP

TIOCM_OUT1

TIOCM_OUT2

TIOCM_RI

TIOCM_RNG

TIOCM_RTS

TIOCM_SR

TIOCM_ST

TIOCNOTTY

TIOCNXCL

TIOCOUTQ

TIOCPKT

TIOCPKT_DATA

Used for packet mode

TIOCPKT_DOSTOP

TIOCPKT_FLUSHREAD

TIOCPKT_FLUSHWRITE

TIOCPKT_IOCTL

TIOCPKT_NOSTOP

TIOCPKT_START

TIOCPKT_STOP

TIOCSBRK

BSD compatibility

TIOCSCTTY

TIOCSERCONFIG

TIOCSERGETLSR

Get line status register

TIOCSERGETMULTI

Get multiport config

TIOCSERGSTRUCT

For debugging only

TIOCSERGWILD

TIOCSERSETMULTI

Set multiport config

TIOCSERSWILD

TIOCSER_TEMT

Transmitter physically empty

TIOCSETD

TIOCSIG

pty: generate signal

TIOCSISO7816

TIOCSLCKTRMIOS

TIOCSPGRP

TIOCSPTLCK

Lock/unlock Pty

TIOCSRS485

TIOCSSERIAL

TIOCSSOFTCAR

TIOCSTI

TIOCSWINSZ

TIOCVHANGUP

TOSTOP

TRAP_BRANCH

process taken branch trap

TRAP_BRKPT

SIGTRAP si_codes process breakpoint

TRAP_HWBKPT

hardware breakpoint/watchpoint

TRAP_TRACE

process trace trap

TRAP_UNK

undiagnosed trap

UART_CLEAR_FIFO

UART_NATSEMI

UART_STARTECH

UART_USE_FIFO

UIO_FASTIOV

UIO_MAXIOV shall be at least 16 1003.1g (5.4.1.1)

UIO_MAXIOV

UMOUNT_NOFOLLOW

Don’t follow symlink on umount

UMOUNT_UNUSED

Flag guaranteed to be unused

UNAME26

Flags for bug emulation.

USEC_PER_MSEC

USEC_PER_SEC

USER_NS_INDEX

USRQUOTA

element used for user quotas

UTS_NS_INDEX

VDISCARD

VEOF

VEOL

VEOL2

VERASE

VFS_CAP_FLAGS_EFFECTIVE

VFS_CAP_REVISION

VFS_CAP_REVISION_1

VFS_CAP_REVISION_2

VFS_CAP_REVISION_3

VFS_CAP_REVISION_MASK

VFS_CAP_REVISION_SHIFT

VFS_CAP_U32

VFS_CAP_U32_1

VFS_CAP_U32_2

VFS_CAP_U32_3

VINTR

c_cc characters

VKILL

VLNEXT

VMIN

VM_BLOCK_DUMP

block dump mode

VM_DIRTY_BACKGROUND

dirty_background_ratio

VM_DIRTY_EXPIRE_CS

dirty_expire_centisecs

VM_DIRTY_RATIO

dirty_ratio

VM_DIRTY_WB_CS

dirty_writeback_centisecs

VM_DROP_PAGECACHE

int: nuke lots of pagecache

VM_HUGETLB_GROUP

permitted hugetlb group

VM_HUGETLB_PAGES

int: Number of available Huge Pages

VM_LAPTOP_MODE

vm laptop mode

VM_LEGACY_VA_LAYOUT

legacy/compatibility virtual address space layout

VM_LOWMEM_RESERVE_RATIO

reservation ratio for lower memory zones

VM_MAX_MAP_COUNT

int: Maximum number of mmaps/address-space

VM_MIN_FREE_KBYTES

Minimum free kilobytes to maintain

VM_MIN_SLAB

Percent pages ignored by zone reclaim

VM_MIN_UNMAPPED

Set min percent of unmapped pages

VM_NR_PDFLUSH_THREADS

nr_pdflush_threads

VM_OVERCOMMIT_MEMORY

Turn off the virtual memory safety limit

VM_OVERCOMMIT_RATIO

percent of RAM to allow overcommit in

VM_PAGEBUF

struct: Control pagebuf parameters

VM_PAGE_CLUSTER

int: set number of pages to swap together

VM_PANIC_ON_OOM

panic at out-of-memory

VM_PERCPU_PAGELIST_FRACTION

int: fraction of pages in each percpu_pagelist

VM_SWAPPINESS

Tendency to steal mapped memory

VM_SWAP_TOKEN_TIMEOUT

default time for token time out

VM_UNUSED1

CTL_VM names:

VM_UNUSED2

was; int: Linear or sqrt() swapout for hogs

VM_UNUSED3

was: struct: Set free page thresholds

VM_UNUSED4

Spare

VM_UNUSED5

was: struct: Set buffer memory thresholds

VM_UNUSED7

was: struct: Set cache memory thresholds

VM_UNUSED8

was: struct: Control kswapd behaviour

VM_UNUSED9

was: struct: Set page table cache parameters

VM_VDSO_ENABLED

map VDSO into new processes?

VM_VFS_CACHE_PRESSURE

dcache/icache reclaim pressure

VM_ZONE_RECLAIM_MODE

reclaim local zone memory before going off node

VQUIT

VREPRINT

VSTART

VSTOP

VSUSP

VSWTC

VT0

VT1

VTDLY

VTIME

VWERASE

WCONTINUED

WEXITED

WHOLE_SECONDS

WNOHANG

WNOWAIT

Don’t reap, just poll status.

WSTOPPED

WUNTRACED

W_OK

Check file is writable.

XATTR_APPARMOR_SUFFIX

XATTR_BTRFS_PREFIX

XATTR_CAPS_SUFFIX

XATTR_CAPS_SZ

XATTR_CAPS_SZ_1

XATTR_CAPS_SZ_2

XATTR_CAPS_SZ_3

XATTR_CREATE

set value, fail if attr already exists

XATTR_EVM_SUFFIX

Security namespace

XATTR_HURD_PREFIX

XATTR_IMA_SUFFIX

XATTR_LIST_MAX

size of extended attribute namelist (64k)

XATTR_MAC_OSX_PREFIX

XATTR_NAME_MAX

chars in an extended attribute name

XATTR_OS2_PREFIX

Namespaces

XATTR_POSIX_ACL_ACCESS

XATTR_POSIX_ACL_DEFAULT

XATTR_REPLACE

set value, fail if attr does not exist

XATTR_SECURITY_PREFIX

XATTR_SELINUX_SUFFIX

XATTR_SIZE_MAX

size of an extended attribute value (64k)

XATTR_SMACK_EXEC

XATTR_SMACK_IPIN

XATTR_SMACK_IPOUT

XATTR_SMACK_MMAP

XATTR_SMACK_SUFFIX

XATTR_SMACK_TRANSMUTE

XATTR_SYSTEM_PREFIX

XATTR_TRUSTED_PREFIX

XATTR_USER_PREFIX

XCASE

XDP_ABORTED

User return codes for XDP prog type.

XDP_DROP

XDP_PACKET_HEADROOM

XDP_PASS

XDP_REDIRECT

XDP_TX

XTABS

X_OK

Check file is executable.

_NSIG

Most things should be clean enough to redefine this at will, if care is taken to make libc match.

_NSIG_BPW

_NSIG_WORDS

_STK_LIM

Limit the stack by to some sane default: root can always increase this limit if needed.. 8MB seems reasonable.

__BLK_TA_ABORT

request aborted

__BLK_TA_BACKMERGE

back merged to existing rq

__BLK_TA_BOUNCE

bio was bounced

__BLK_TA_CGROUP

from a cgroup

__BLK_TA_COMPLETE

completed by driver

__BLK_TA_DRV_DATA

driver-specific binary data

__BLK_TA_FRONTMERGE

front merge to existing rq

__BLK_TA_GETRQ

allocated new request

__BLK_TA_INSERT

insert request

__BLK_TA_ISSUE

sent to driver

__BLK_TA_PLUG

queue was plugged

__BLK_TA_QUEUE

queued

__BLK_TA_REMAP

bio was remapped

__BLK_TA_REQUEUE

request requeued

__BLK_TA_SLEEPRQ

sleeping on rq allocation

__BLK_TA_SPLIT

bio was split

__BLK_TA_UNPLUG_IO

queue was unplugged by io

__BLK_TA_UNPLUG_TIMER

queue was unplugged by timer

__BLK_TN_CGROUP

from a cgroup

__BLK_TN_MESSAGE

Character string message

__BLK_TN_PROCESS

establish pid/name mapping

__BLK_TN_TIMESTAMP

include system clock

__FPE_DECDIV

decimal division by zero

__FPE_DECERR

packed decimal error

__FPE_DECOVF

decimal overflow

__FPE_INVASC

invalid ASCII digit

__FPE_INVDEC

invalid decimal digit

__ILL_BNDMOD

bundle-update (modification) in progress

__ILL_BREAK

illegal break

__O_SYNC

Before Linux 2.6.33 only O_DSYNC semantics were implemented, but using the O_SYNC flag.

__O_TMPFILE

__QUOTA_NL_A_MAX

__QUOTA_NL_C_MAX

__SO_ACCEPTCON

performed a listen

__WALL

Wait on all children, regardless of type

__WCLONE

Wait only on non-SIGCHLD children

__WNOTHREAD

Don’t wait on children of other threads in this group

Functions

BLK_TC_ACT

FUTEX_OP

FUTEX_WAKE_OP will perform atomically.

IO

Used to create numbers.

IOC

IOC_DIR

used to decode ioctl numbers..

IOC_NR

IOC_SIZE

IOC_TYPE

IOC_TYPECHECK

IOR

IOR_BAD

IOW

IOWR

IOWR_BAD

IOW_BAD

QCMD

SECCOMP_IO

SECCOMP_IOR

SECCOMP_IOW

SECCOMP_IOWR

SER_ISO7816_T

S_ISBLK

S_ISCHR

S_ISDIR

S_ISFIFO

S_ISLNK

S_ISREG

S_ISSOCK

in_badclass

in_class_a

Definitions of the bits in an Internet address integer. On subnets, host and network parts are found according to the subnet mask, not these masks.

in_class_b

in_class_c

in_class_d

in_class_e

in_experimental

in_loopback

in_multicast

ioprio_prio_class

ioprio_prio_data

ioprio_prio_value

ioprio_valid

perf_flags

s_dt

Type Aliases

__kernel_clock_t

__kernel_clockid_t

__kernel_daddr_t

__kernel_gid16_t

__kernel_gid32_t

__kernel_gid_t

__kernel_ino_t

__kernel_ipc_pid_t

__kernel_loff_t

__kernel_long_t

__kernel_mode_t

__kernel_off_t

anything below here should be completely generic

__kernel_old_time_t

__kernel_pid_t

__kernel_ptrdiff_t

__kernel_size_t

Most 32 bit architectures use unsigned int size_t, and all 64 bit architectures use unsigned long size_t.

__kernel_ssize_t

__kernel_suseconds_t

__kernel_time64_t

__kernel_time_t

__kernel_timer_t

__kernel_uid16_t

__kernel_uid32_t

__kernel_uid_t

__kernel_ulong_t

_statfs_word

Most 64-bit platforms use ‘long’, while most 32-bit platforms use ‘__u32’.

aio_context_t

arch_si_band_t

The default si_band type is “long”, as specified by POSIX. However, some architectures want to override this to “int” for historical compatibility reasons, so we allow that.

arch_si_clock_t

be16_t

be32_t

be64_t

blkcnt_t

blksize_t

blktrace_act_t

Basic trace actions

blktrace_cat_t

Trace categories

blktrace_notify_t

Notify events.

c_char

cc_t

clock_t

clockid_t

daddr_t

dev_t

file_t

fmode_t

fsblkcnt_t

fsconfig_command_t

The type of fsconfig() call made.

fsfilcnt_t

gfp_t

gid16_t

gid32_t

gid_t

ino64_t

ino_t

intptr_t

ipc_pid_t

kernel_sa_family_t

key_perm_t

key handle permissions mask

key_serial_t

key handle serial number

key_t

Type of a SYSV IPC key.

le16_t

le32_t

le64_t

loff_t

mode_t

mqd_t

nlink_t

off_t

Anything below here should be completely generic.

old_sigset_t

at least 32 bits

pgoff_t

The type of an index into the pagecache.

pid_t

poll_t

pthread_key_t

pthread_once_t

pthread_spinlock_t

ptrdiff_t

qid_t

Type in which we store ids in memory

qsize_t

Type in which we store sizes

register_t

regoff_t

restorefn_t

The restore function should be written with assembly, or naked rust function, which does not modify stack frame.

rwf_t

Flags for preadv2/pwritev2:

sa_family_t

sector_t

The type used for indexing onto a disc or disc partition.

sighandler_t

Type of a signal handler. signalfn_t as usize

signalfn_t

sigrestore_t

restorefn_t as usize

size_t

Most 32 bit architectures use unsigned int size_t, and all 64 bit architectures use unsigned long size_t.

slab_flags_t

sockaddr_storage_t

socket_state_t

socket-state enum.

socklen_t

speed_t

ssize_t

stack_t

suseconds_t

tcflag_t

time64_t

time_t

timer_t

timeu64_t

uid16_t

uid32_t

uid_t

uintptr_t

umode_t

useconds_t

user_msghdr_t

utsname_t

wctype_t

wint_t

Unions

bpf_attr_getid_id_t

bpf_attr_t

bpf_fib_lookup_addr_t

bpf_fib_lookup_inputs_t

inputs to lookup

bpf_flow_keys_addr_t

bpf_md_end_ptr_t

bpf_md_ptr_t

bpf_sock_ops_reply_t

bpf_sock_tuple_t

epoll_data_t

in6_un_t

IPv6 address structure

io_uring_sqe_buf_addr_t

io_uring_sqe_buf_group_t

io_uring_sqe_file_off_t

io_uring_sqe_opt_buf_t

io_uring_sqe_other_flags_t

perf_event_attr_config1_t

perf_event_attr_config2_t

perf_event_attr_sample_t

perf_event_attr_wakeup_t

perf_event_mmap_page_cap_t

perf_mem_data_src_t

ptrace_syscall_info_seccomp_t

rseq_cs_union_t

semun_t

arg for semctl system calls.

sifields_t

sigev_un_t

siginfo_t

sigval_t