linux-next/arch/arm/tools/syscall.tbl
Christian Göttsche 6140be90ec fs/xattr: add *at family syscalls
Add the four syscalls setxattrat(), getxattrat(), listxattrat() and
removexattrat().  Those can be used to operate on extended attributes,
especially security related ones, either relative to a pinned directory
or on a file descriptor without read access, avoiding a
/proc/<pid>/fd/<fd> detour, requiring a mounted procfs.

One use case will be setfiles(8) setting SELinux file contexts
("security.selinux") without race conditions and without a file
descriptor opened with read access requiring SELinux read permission.

Use the do_{name}at() pattern from fs/open.c.

Pass the value of the extended attribute, its length, and for
setxattrat(2) the command (XATTR_CREATE or XATTR_REPLACE) via an added
struct xattr_args to not exceed six syscall arguments and not
merging the AT_* and XATTR_* flags.

[AV: fixes by Christian Brauner folded in, the entire thing rebased on
top of {filename,file}_...xattr() primitives, treatment of empty
pathnames regularized.  As the result, AT_EMPTY_PATH+NULL handling
is cheap, so f...(2) can use it]

Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
Link: https://lore.kernel.org/r/20240426162042.191916-1-cgoettsche@seltendoof.de
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Christian Brauner <brauner@kernel.org>
CC: x86@kernel.org
CC: linux-alpha@vger.kernel.org
CC: linux-kernel@vger.kernel.org
CC: linux-arm-kernel@lists.infradead.org
CC: linux-ia64@vger.kernel.org
CC: linux-m68k@lists.linux-m68k.org
CC: linux-mips@vger.kernel.org
CC: linux-parisc@vger.kernel.org
CC: linuxppc-dev@lists.ozlabs.org
CC: linux-s390@vger.kernel.org
CC: linux-sh@vger.kernel.org
CC: sparclinux@vger.kernel.org
CC: linux-fsdevel@vger.kernel.org
CC: audit@vger.kernel.org
CC: linux-arch@vger.kernel.org
CC: linux-api@vger.kernel.org
CC: linux-security-module@vger.kernel.org
CC: selinux@vger.kernel.org
[brauner: slight tweaks]
Signed-off-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2024-11-06 12:59:44 -05:00

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# SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
#
# Linux system call numbers and entry vectors
#
# The format is:
# <num> <abi> <name> [<entry point> [<oabi compat entry point>]]
#
# Where abi is:
# common - for system calls shared between oabi and eabi (may have compat)
# oabi - for oabi-only system calls (may have compat)
# eabi - for eabi-only system calls
#
# For each syscall number, "common" is mutually exclusive with oabi and eabi
#
0 common restart_syscall sys_restart_syscall
1 common exit sys_exit
2 common fork sys_fork
3 common read sys_read
4 common write sys_write
5 common open sys_open
6 common close sys_close
# 7 was sys_waitpid
8 common creat sys_creat
9 common link sys_link
10 common unlink sys_unlink
11 common execve sys_execve
12 common chdir sys_chdir
13 oabi time sys_time32
14 common mknod sys_mknod
15 common chmod sys_chmod
16 common lchown sys_lchown16
# 17 was sys_break
# 18 was sys_stat
19 common lseek sys_lseek
20 common getpid sys_getpid
21 common mount sys_mount
22 oabi umount sys_oldumount
23 common setuid sys_setuid16
24 common getuid sys_getuid16
25 oabi stime sys_stime32
26 common ptrace sys_ptrace
27 oabi alarm sys_alarm
# 28 was sys_fstat
29 common pause sys_pause
30 oabi utime sys_utime32
# 31 was sys_stty
# 32 was sys_gtty
33 common access sys_access
34 common nice sys_nice
# 35 was sys_ftime
36 common sync sys_sync
37 common kill sys_kill
38 common rename sys_rename
39 common mkdir sys_mkdir
40 common rmdir sys_rmdir
41 common dup sys_dup
42 common pipe sys_pipe
43 common times sys_times
# 44 was sys_prof
45 common brk sys_brk
46 common setgid sys_setgid16
47 common getgid sys_getgid16
# 48 was sys_signal
49 common geteuid sys_geteuid16
50 common getegid sys_getegid16
51 common acct sys_acct
52 common umount2 sys_umount
# 53 was sys_lock
54 common ioctl sys_ioctl
55 common fcntl sys_fcntl
# 56 was sys_mpx
57 common setpgid sys_setpgid
# 58 was sys_ulimit
# 59 was sys_olduname
60 common umask sys_umask
61 common chroot sys_chroot
62 common ustat sys_ustat
63 common dup2 sys_dup2
64 common getppid sys_getppid
65 common getpgrp sys_getpgrp
66 common setsid sys_setsid
67 common sigaction sys_sigaction
# 68 was sys_sgetmask
# 69 was sys_ssetmask
70 common setreuid sys_setreuid16
71 common setregid sys_setregid16
72 common sigsuspend sys_sigsuspend
73 common sigpending sys_sigpending
74 common sethostname sys_sethostname
75 common setrlimit sys_setrlimit
# Back compat 2GB limited rlimit
76 oabi getrlimit sys_old_getrlimit
77 common getrusage sys_getrusage
78 common gettimeofday sys_gettimeofday
79 common settimeofday sys_settimeofday
80 common getgroups sys_getgroups16
81 common setgroups sys_setgroups16
82 oabi select sys_old_select
83 common symlink sys_symlink
# 84 was sys_lstat
85 common readlink sys_readlink
86 common uselib sys_uselib
87 common swapon sys_swapon
88 common reboot sys_reboot
89 oabi readdir sys_old_readdir
90 oabi mmap sys_old_mmap
91 common munmap sys_munmap
92 common truncate sys_truncate
93 common ftruncate sys_ftruncate
94 common fchmod sys_fchmod
95 common fchown sys_fchown16
96 common getpriority sys_getpriority
97 common setpriority sys_setpriority
# 98 was sys_profil
99 common statfs sys_statfs
100 common fstatfs sys_fstatfs
# 101 was sys_ioperm
102 oabi socketcall sys_socketcall sys_oabi_socketcall
103 common syslog sys_syslog
104 common setitimer sys_setitimer
105 common getitimer sys_getitimer
106 common stat sys_newstat
107 common lstat sys_newlstat
108 common fstat sys_newfstat
# 109 was sys_uname
# 110 was sys_iopl
111 common vhangup sys_vhangup
# 112 was sys_idle
# syscall to call a syscall!
113 oabi syscall sys_syscall
114 common wait4 sys_wait4
115 common swapoff sys_swapoff
116 common sysinfo sys_sysinfo
117 oabi ipc sys_ipc sys_oabi_ipc
118 common fsync sys_fsync
119 common sigreturn sys_sigreturn_wrapper
120 common clone sys_clone
121 common setdomainname sys_setdomainname
122 common uname sys_newuname
# 123 was sys_modify_ldt
124 common adjtimex sys_adjtimex_time32
125 common mprotect sys_mprotect
126 common sigprocmask sys_sigprocmask
# 127 was sys_create_module
128 common init_module sys_init_module
129 common delete_module sys_delete_module
# 130 was sys_get_kernel_syms
131 common quotactl sys_quotactl
132 common getpgid sys_getpgid
133 common fchdir sys_fchdir
134 common bdflush sys_ni_syscall
135 common sysfs sys_sysfs
136 common personality sys_personality
# 137 was sys_afs_syscall
138 common setfsuid sys_setfsuid16
139 common setfsgid sys_setfsgid16
140 common _llseek sys_llseek
141 common getdents sys_getdents
142 common _newselect sys_select
143 common flock sys_flock
144 common msync sys_msync
145 common readv sys_readv
146 common writev sys_writev
147 common getsid sys_getsid
148 common fdatasync sys_fdatasync
149 common _sysctl sys_ni_syscall
150 common mlock sys_mlock
151 common munlock sys_munlock
152 common mlockall sys_mlockall
153 common munlockall sys_munlockall
154 common sched_setparam sys_sched_setparam
155 common sched_getparam sys_sched_getparam
156 common sched_setscheduler sys_sched_setscheduler
157 common sched_getscheduler sys_sched_getscheduler
158 common sched_yield sys_sched_yield
159 common sched_get_priority_max sys_sched_get_priority_max
160 common sched_get_priority_min sys_sched_get_priority_min
161 common sched_rr_get_interval sys_sched_rr_get_interval_time32
162 common nanosleep sys_nanosleep_time32
163 common mremap sys_mremap
164 common setresuid sys_setresuid16
165 common getresuid sys_getresuid16
# 166 was sys_vm86
# 167 was sys_query_module
168 common poll sys_poll
169 common nfsservctl
170 common setresgid sys_setresgid16
171 common getresgid sys_getresgid16
172 common prctl sys_prctl
173 common rt_sigreturn sys_rt_sigreturn_wrapper
174 common rt_sigaction sys_rt_sigaction
175 common rt_sigprocmask sys_rt_sigprocmask
176 common rt_sigpending sys_rt_sigpending
177 common rt_sigtimedwait sys_rt_sigtimedwait_time32
178 common rt_sigqueueinfo sys_rt_sigqueueinfo
179 common rt_sigsuspend sys_rt_sigsuspend
180 common pread64 sys_pread64 sys_oabi_pread64
181 common pwrite64 sys_pwrite64 sys_oabi_pwrite64
182 common chown sys_chown16
183 common getcwd sys_getcwd
184 common capget sys_capget
185 common capset sys_capset
186 common sigaltstack sys_sigaltstack
187 common sendfile sys_sendfile
# 188 reserved
# 189 reserved
190 common vfork sys_vfork
# SuS compliant getrlimit
191 common ugetrlimit sys_getrlimit
192 common mmap2 sys_mmap2
193 common truncate64 sys_truncate64 sys_oabi_truncate64
194 common ftruncate64 sys_ftruncate64 sys_oabi_ftruncate64
195 common stat64 sys_stat64 sys_oabi_stat64
196 common lstat64 sys_lstat64 sys_oabi_lstat64
197 common fstat64 sys_fstat64 sys_oabi_fstat64
198 common lchown32 sys_lchown
199 common getuid32 sys_getuid
200 common getgid32 sys_getgid
201 common geteuid32 sys_geteuid
202 common getegid32 sys_getegid
203 common setreuid32 sys_setreuid
204 common setregid32 sys_setregid
205 common getgroups32 sys_getgroups
206 common setgroups32 sys_setgroups
207 common fchown32 sys_fchown
208 common setresuid32 sys_setresuid
209 common getresuid32 sys_getresuid
210 common setresgid32 sys_setresgid
211 common getresgid32 sys_getresgid
212 common chown32 sys_chown
213 common setuid32 sys_setuid
214 common setgid32 sys_setgid
215 common setfsuid32 sys_setfsuid
216 common setfsgid32 sys_setfsgid
217 common getdents64 sys_getdents64
218 common pivot_root sys_pivot_root
219 common mincore sys_mincore
220 common madvise sys_madvise
221 common fcntl64 sys_fcntl64 sys_oabi_fcntl64
# 222 for tux
# 223 is unused
224 common gettid sys_gettid
225 common readahead sys_readahead sys_oabi_readahead
226 common setxattr sys_setxattr
227 common lsetxattr sys_lsetxattr
228 common fsetxattr sys_fsetxattr
229 common getxattr sys_getxattr
230 common lgetxattr sys_lgetxattr
231 common fgetxattr sys_fgetxattr
232 common listxattr sys_listxattr
233 common llistxattr sys_llistxattr
234 common flistxattr sys_flistxattr
235 common removexattr sys_removexattr
236 common lremovexattr sys_lremovexattr
237 common fremovexattr sys_fremovexattr
238 common tkill sys_tkill
239 common sendfile64 sys_sendfile64
240 common futex sys_futex_time32
241 common sched_setaffinity sys_sched_setaffinity
242 common sched_getaffinity sys_sched_getaffinity
243 common io_setup sys_io_setup
244 common io_destroy sys_io_destroy
245 common io_getevents sys_io_getevents_time32
246 common io_submit sys_io_submit
247 common io_cancel sys_io_cancel
248 common exit_group sys_exit_group
249 common lookup_dcookie sys_ni_syscall
250 common epoll_create sys_epoll_create
251 common epoll_ctl sys_epoll_ctl sys_oabi_epoll_ctl
252 common epoll_wait sys_epoll_wait
253 common remap_file_pages sys_remap_file_pages
# 254 for set_thread_area
# 255 for get_thread_area
256 common set_tid_address sys_set_tid_address
257 common timer_create sys_timer_create
258 common timer_settime sys_timer_settime32
259 common timer_gettime sys_timer_gettime32
260 common timer_getoverrun sys_timer_getoverrun
261 common timer_delete sys_timer_delete
262 common clock_settime sys_clock_settime32
263 common clock_gettime sys_clock_gettime32
264 common clock_getres sys_clock_getres_time32
265 common clock_nanosleep sys_clock_nanosleep_time32
266 common statfs64 sys_statfs64_wrapper
267 common fstatfs64 sys_fstatfs64_wrapper
268 common tgkill sys_tgkill
269 common utimes sys_utimes_time32
270 common arm_fadvise64_64 sys_arm_fadvise64_64
271 common pciconfig_iobase sys_pciconfig_iobase
272 common pciconfig_read sys_pciconfig_read
273 common pciconfig_write sys_pciconfig_write
274 common mq_open sys_mq_open
275 common mq_unlink sys_mq_unlink
276 common mq_timedsend sys_mq_timedsend_time32
277 common mq_timedreceive sys_mq_timedreceive_time32
278 common mq_notify sys_mq_notify
279 common mq_getsetattr sys_mq_getsetattr
280 common waitid sys_waitid
281 common socket sys_socket
282 common bind sys_bind sys_oabi_bind
283 common connect sys_connect sys_oabi_connect
284 common listen sys_listen
285 common accept sys_accept
286 common getsockname sys_getsockname
287 common getpeername sys_getpeername
288 common socketpair sys_socketpair
289 common send sys_send
290 common sendto sys_sendto sys_oabi_sendto
291 common recv sys_recv
292 common recvfrom sys_recvfrom
293 common shutdown sys_shutdown
294 common setsockopt sys_setsockopt
295 common getsockopt sys_getsockopt
296 common sendmsg sys_sendmsg sys_oabi_sendmsg
297 common recvmsg sys_recvmsg
298 common semop sys_semop sys_oabi_semop
299 common semget sys_semget
300 common semctl sys_old_semctl
301 common msgsnd sys_msgsnd
302 common msgrcv sys_msgrcv
303 common msgget sys_msgget
304 common msgctl sys_old_msgctl
305 common shmat sys_shmat
306 common shmdt sys_shmdt
307 common shmget sys_shmget
308 common shmctl sys_old_shmctl
309 common add_key sys_add_key
310 common request_key sys_request_key
311 common keyctl sys_keyctl
312 common semtimedop sys_semtimedop_time32 sys_oabi_semtimedop
313 common vserver
314 common ioprio_set sys_ioprio_set
315 common ioprio_get sys_ioprio_get
316 common inotify_init sys_inotify_init
317 common inotify_add_watch sys_inotify_add_watch
318 common inotify_rm_watch sys_inotify_rm_watch
319 common mbind sys_mbind
320 common get_mempolicy sys_get_mempolicy
321 common set_mempolicy sys_set_mempolicy
322 common openat sys_openat
323 common mkdirat sys_mkdirat
324 common mknodat sys_mknodat
325 common fchownat sys_fchownat
326 common futimesat sys_futimesat_time32
327 common fstatat64 sys_fstatat64 sys_oabi_fstatat64
328 common unlinkat sys_unlinkat
329 common renameat sys_renameat
330 common linkat sys_linkat
331 common symlinkat sys_symlinkat
332 common readlinkat sys_readlinkat
333 common fchmodat sys_fchmodat
334 common faccessat sys_faccessat
335 common pselect6 sys_pselect6_time32
336 common ppoll sys_ppoll_time32
337 common unshare sys_unshare
338 common set_robust_list sys_set_robust_list
339 common get_robust_list sys_get_robust_list
340 common splice sys_splice
341 common arm_sync_file_range sys_sync_file_range2
342 common tee sys_tee
343 common vmsplice sys_vmsplice
344 common move_pages sys_move_pages
345 common getcpu sys_getcpu
346 common epoll_pwait sys_epoll_pwait
347 common kexec_load sys_kexec_load
348 common utimensat sys_utimensat_time32
349 common signalfd sys_signalfd
350 common timerfd_create sys_timerfd_create
351 common eventfd sys_eventfd
352 common fallocate sys_fallocate
353 common timerfd_settime sys_timerfd_settime32
354 common timerfd_gettime sys_timerfd_gettime32
355 common signalfd4 sys_signalfd4
356 common eventfd2 sys_eventfd2
357 common epoll_create1 sys_epoll_create1
358 common dup3 sys_dup3
359 common pipe2 sys_pipe2
360 common inotify_init1 sys_inotify_init1
361 common preadv sys_preadv
362 common pwritev sys_pwritev
363 common rt_tgsigqueueinfo sys_rt_tgsigqueueinfo
364 common perf_event_open sys_perf_event_open
365 common recvmmsg sys_recvmmsg_time32
366 common accept4 sys_accept4
367 common fanotify_init sys_fanotify_init
368 common fanotify_mark sys_fanotify_mark
369 common prlimit64 sys_prlimit64
370 common name_to_handle_at sys_name_to_handle_at
371 common open_by_handle_at sys_open_by_handle_at
372 common clock_adjtime sys_clock_adjtime32
373 common syncfs sys_syncfs
374 common sendmmsg sys_sendmmsg
375 common setns sys_setns
376 common process_vm_readv sys_process_vm_readv
377 common process_vm_writev sys_process_vm_writev
378 common kcmp sys_kcmp
379 common finit_module sys_finit_module
380 common sched_setattr sys_sched_setattr
381 common sched_getattr sys_sched_getattr
382 common renameat2 sys_renameat2
383 common seccomp sys_seccomp
384 common getrandom sys_getrandom
385 common memfd_create sys_memfd_create
386 common bpf sys_bpf
387 common execveat sys_execveat
388 common userfaultfd sys_userfaultfd
389 common membarrier sys_membarrier
390 common mlock2 sys_mlock2
391 common copy_file_range sys_copy_file_range
392 common preadv2 sys_preadv2
393 common pwritev2 sys_pwritev2
394 common pkey_mprotect sys_pkey_mprotect
395 common pkey_alloc sys_pkey_alloc
396 common pkey_free sys_pkey_free
397 common statx sys_statx
398 common rseq sys_rseq
399 common io_pgetevents sys_io_pgetevents_time32
400 common migrate_pages sys_migrate_pages
401 common kexec_file_load sys_kexec_file_load
# 402 is unused
403 common clock_gettime64 sys_clock_gettime
404 common clock_settime64 sys_clock_settime
405 common clock_adjtime64 sys_clock_adjtime
406 common clock_getres_time64 sys_clock_getres
407 common clock_nanosleep_time64 sys_clock_nanosleep
408 common timer_gettime64 sys_timer_gettime
409 common timer_settime64 sys_timer_settime
410 common timerfd_gettime64 sys_timerfd_gettime
411 common timerfd_settime64 sys_timerfd_settime
412 common utimensat_time64 sys_utimensat
413 common pselect6_time64 sys_pselect6
414 common ppoll_time64 sys_ppoll
416 common io_pgetevents_time64 sys_io_pgetevents
417 common recvmmsg_time64 sys_recvmmsg
418 common mq_timedsend_time64 sys_mq_timedsend
419 common mq_timedreceive_time64 sys_mq_timedreceive
420 common semtimedop_time64 sys_semtimedop
421 common rt_sigtimedwait_time64 sys_rt_sigtimedwait
422 common futex_time64 sys_futex
423 common sched_rr_get_interval_time64 sys_sched_rr_get_interval
424 common pidfd_send_signal sys_pidfd_send_signal
425 common io_uring_setup sys_io_uring_setup
426 common io_uring_enter sys_io_uring_enter
427 common io_uring_register sys_io_uring_register
428 common open_tree sys_open_tree
429 common move_mount sys_move_mount
430 common fsopen sys_fsopen
431 common fsconfig sys_fsconfig
432 common fsmount sys_fsmount
433 common fspick sys_fspick
434 common pidfd_open sys_pidfd_open
435 common clone3 sys_clone3
436 common close_range sys_close_range
437 common openat2 sys_openat2
438 common pidfd_getfd sys_pidfd_getfd
439 common faccessat2 sys_faccessat2
440 common process_madvise sys_process_madvise
441 common epoll_pwait2 sys_epoll_pwait2
442 common mount_setattr sys_mount_setattr
443 common quotactl_fd sys_quotactl_fd
444 common landlock_create_ruleset sys_landlock_create_ruleset
445 common landlock_add_rule sys_landlock_add_rule
446 common landlock_restrict_self sys_landlock_restrict_self
# 447 reserved for memfd_secret
448 common process_mrelease sys_process_mrelease
449 common futex_waitv sys_futex_waitv
450 common set_mempolicy_home_node sys_set_mempolicy_home_node
451 common cachestat sys_cachestat
452 common fchmodat2 sys_fchmodat2
453 common map_shadow_stack sys_map_shadow_stack
454 common futex_wake sys_futex_wake
455 common futex_wait sys_futex_wait
456 common futex_requeue sys_futex_requeue
457 common statmount sys_statmount
458 common listmount sys_listmount
459 common lsm_get_self_attr sys_lsm_get_self_attr
460 common lsm_set_self_attr sys_lsm_set_self_attr
461 common lsm_list_modules sys_lsm_list_modules
462 common mseal sys_mseal
463 common setxattrat sys_setxattrat
464 common getxattrat sys_getxattrat
465 common listxattrat sys_listxattrat
466 common removexattrat sys_removexattrat