freebsd-dev/sys/kern
Ka Ho Ng 1eaa36523c fspacectl(2): Clarifies the return values
rmacklem@ spotted two things in the system call:
- Upon returning from a successful operation, vop_stddeallocate can
  update rmsr.r_offset to a value greater than file size. This behavior,
  although being harmless, can be confusing.
- The EINVAL return value for rqsr.r_offset + rqsr.r_len > OFF_MAX is
  undocumented.

This commit has the following changes:
- vop_stddeallocate and shm_deallocate to bound the the affected area
  further by the file size.
- The EINVAL case for rqsr.r_offset + rqsr.r_len > OFF_MAX is
  documented.
- The fspacectl(2), vn_deallocate(9) and VOP_DEALLOCATE(9)'s return
  len is explicitly documented the be the value 0, and the return offset
  is restricted to be the smallest of off + len and current file size
  suggested by kib@. This semantic allows callers to interact better
  with potential file size growth after the call.

Sponsored by:	The FreeBSD Foundation
Reviewed by:	imp, kib
Differential Revision:	https://reviews.freebsd.org/D31604
2021-08-24 17:08:28 +08:00
..
bus_if.m newbus: Move from bus_child_{pnpinfo,location}_src to bus_child_{pnpinfo,location} with sbuf 2021-06-22 20:52:06 -06:00
capabilities.conf Add fspacectl(2), vn_deallocate(9) and VOP_DEALLOCATE(9). 2021-08-05 23:20:42 +08:00
clock_if.m
cpufreq_if.m
device_if.m
firmw.S Use a template assembly file for firmware object files. 2020-12-17 20:31:17 +00:00
genassym.sh genassym.sh: Fix two minor issues found by shellcheck 2021-07-28 13:49:16 -06:00
genoffset.c
genoffset.sh genoffset: simplify and rewrite in sh 2021-07-28 13:50:09 -06:00
imgact_aout.c fork: Allow ABI to specify fork return values for child. 2021-08-12 11:45:25 +03:00
imgact_binmisc.c imgact_binmisc: limit the extent of match on incoming entries 2020-11-08 04:24:29 +00:00
imgact_elf32.c
imgact_elf64.c
imgact_elf.c imgact_elf: Avoid redefining suword() 2021-07-23 15:40:54 -04:00
imgact_shell.c
init_main.c fork: Allow ABI to specify fork return values for child. 2021-08-12 11:45:25 +03:00
init_sysent.c Regen after 0dc332bff2 2021-08-05 23:22:02 +08:00
kern_acct.c acct: Zero pad bytes in accounting records 2021-07-23 10:29:57 -04:00
kern_alq.c
kern_clock.c
kern_clocksource.c
kern_condvar.c Use sleepq_signal(SLEEPQ_DROP) in cv_signal(). 2021-07-09 20:57:58 -04:00
kern_conf.c Fix handling of D_GIANTOK 2021-06-07 16:45:50 -04:00
kern_cons.c Remove sysctl_kern_consmute() 2020-10-05 15:54:19 +00:00
kern_context.c
kern_cpu.c
kern_cpuset.c domainset: Define additional global policies 2021-04-14 13:03:33 -04:00
kern_ctf.c
kern_descrip.c Add required sysctl name length checks to various handlers 2021-07-23 10:47:13 -04:00
kern_dtrace.c dtrace: stop using eventhandlers for the part compiled into the kernel 2020-11-23 18:27:21 +00:00
kern_dump.c Always use 64-bit physical addresses for dump_avail[] in minidumps 2020-12-03 17:12:31 +00:00
kern_environment.c kenv: allow listing of static kernel environments 2021-07-18 23:06:19 -05:00
kern_et.c Remove NO_EVENTTIMERS support 2020-11-19 02:50:48 +00:00
kern_event.c kqueue: replace kq_ncallouts loop with atomic_fetchadd 2021-06-02 15:14:58 +00:00
kern_exec.c umtx: Split umtx.h on two counterparts. 2021-07-29 12:41:29 +03:00
kern_exit.c umtx: Split umtx.h on two counterparts. 2021-07-29 12:41:29 +03:00
kern_fail.c
kern_ffclock.c
kern_fork.c fork: Remove the unnecessary spaces. 2021-08-12 11:58:17 +03:00
kern_hhook.c
kern_idle.c
kern_intr.c Mark some sysctls as CTLFLAG_MPSAFE. 2021-08-10 22:18:26 -04:00
kern_jail.c kern: ether_gen_addr: randomize on default hostuuid, too 2021-06-01 22:59:21 -05:00
kern_kcov.c Generalize bus_space(9) and atomic(9) sanitizer interceptors 2021-03-22 22:21:53 -04:00
kern_khelp.c
kern_kthread.c umtx: Split umtx.h on two counterparts. 2021-07-29 12:41:29 +03:00
kern_ktr.c
kern_ktrace.c ktrace: Zero request structures when populating the pool 2021-07-23 10:29:53 -04:00
kern_linker.c link_elf_obj: Invoke fini callbacks 2021-07-29 09:46:25 -04:00
kern_lock.c lockprof: pass lock type as an argument instead of reading the spin flag 2021-05-23 17:55:27 +00:00
kern_lockf.c
kern_lockstat.c
kern_loginclass.c Drop "All rights reserved" from all my stuff. This includes 2020-10-28 13:46:11 +00:00
kern_malloc.c uma: Add KMSAN hooks 2021-08-10 21:27:54 -04:00
kern_mbuf.c Introduce m_get3() 2021-08-18 08:48:27 +02:00
kern_mib.c jail: Consistently handle the pr_allow bitmask 2020-12-26 20:25:02 -08:00
kern_module.c
kern_mtxpool.c
kern_mutex.c Fix lockstat:::thread-spin dtrace probe with LOCK_PROFILING 2021-08-02 14:44:23 -05:00
kern_ntptime.c Add kern_ntp_adjtime(9). 2020-12-04 18:56:44 +00:00
kern_osd.c
kern_physio.c Minor style tidy: if( -> if ( 2021-04-18 11:19:15 -06:00
kern_pmc.c
kern_poll.c
kern_priv.c jail: Consistently handle the pr_allow bitmask 2020-12-26 20:25:02 -08:00
kern_proc.c kdb: Handle process enumeration before procinit() 2021-08-11 14:44:22 -03:00
kern_procctl.c procctl(PROC_ASLR_STATUS): fix vmspace leak 2021-07-15 03:02:50 +03:00
kern_prot.c kern: fail getgroup and setgroup with negative int 2021-06-02 13:22:57 -06:00
kern_racct.c umtx: Split umtx.h on two counterparts. 2021-07-29 12:41:29 +03:00
kern_rangelock.c
kern_rctl.c rctl(4): support throttling resource usage to 0 2021-01-11 15:36:57 -08:00
kern_resource.c umtx: Split umtx.h on two counterparts. 2021-07-29 12:41:29 +03:00
kern_rmlock.c rmlock(9): add an RM_DUPOK flag 2021-04-12 11:42:21 -03:00
kern_rwlock.c lockprof: pass lock type as an argument instead of reading the spin flag 2021-05-23 17:55:27 +00:00
kern_sdt.c
kern_sema.c
kern_sendfile.c Fix handling of errors from pru_send(PRUS_NOTREADY) 2021-05-21 17:45:19 -04:00
kern_sharedpage.c Remove bogus cast from exec_sysvec_init(). 2021-07-20 09:54:09 +03:00
kern_shutdown.c netdump: send key before dump, in case dump fails 2021-08-11 10:54:56 -05:00
kern_sig.c sigtimedwait: Use a unique wait channel for sleeping 2021-08-16 15:11:15 -04:00
kern_switch.c
kern_sx.c lockprof: pass lock type as an argument instead of reading the spin flag 2021-05-23 17:55:27 +00:00
kern_synch.c tsleep: Add a PNOLOCK flag 2021-08-05 17:16:30 -04:00
kern_syscalls.c Move syscall_thread_{enter,exit}() into the slow path. This is only 2020-11-08 15:54:59 +00:00
kern_sysctl.c Escape any '.' characters in sysctl node names 2021-07-22 10:22:48 -06:00
kern_tc.c Remove "All Rights Reserved" from FreeBSD Foundation sys/ copyrights 2021-08-08 10:42:24 -04:00
kern_thr.c umtx: Split umtx.h on two counterparts. 2021-07-29 12:41:29 +03:00
kern_thread.c kern: Ensure that thread-local KMSAN state is available 2021-08-10 21:27:53 -04:00
kern_time.c posix timers: Check for overflow when converting to ns 2021-05-13 08:34:03 -04:00
kern_timeout.c callout: Make cc_cpu local to kern_timeout.c 2021-07-15 22:41:10 -04:00
kern_tslog.c kern_tslog: Include tslog data from loader 2021-06-20 20:09:47 -07:00
kern_ubsan.c
kern_umtx.c umtx: Split do_unlock_pi on two counterparts. 2021-07-29 12:47:39 +03:00
kern_uuid.c
kern_xxx.c
ksched.c
link_elf_obj.c link_elf_obj: Invoke fini callbacks 2021-07-29 09:46:25 -04:00
link_elf.c vm_map_protect: allow to set prot and max_prot in one go. 2021-01-13 01:35:22 +02:00
linker_if.m
Make.tags.inc
Makefile
md4c.c
md5c.c
msi_if.m Remove "All Rights Reserved" from FreeBSD Foundation sys/ copyrights 2021-08-08 10:42:24 -04:00
p1003_1b.c
pic_if.m
posix4_mib.c
sched_4bsd.c umtx: Split umtx.h on two counterparts. 2021-07-29 12:41:29 +03:00
sched_ule.c sched_ule(4): Pre-seed sched_random(). 2021-08-02 10:55:28 -04:00
serdev_if.m
stack_protector.c
subr_acl_nfs4.c Drop "All rights reserved" from all my stuff. This includes 2020-10-28 13:46:11 +00:00
subr_acl_posix1e.c
subr_asan.c Add interceptors for atomic operations on userspace memory 2021-07-29 21:14:36 -04:00
subr_atomic64.c
subr_autoconf.c config_intrhook: provide config_intrhook_drain 2021-03-11 09:45:10 -07:00
subr_blist.c blist: Correct the node count computed in blist_create() 2021-07-13 17:47:27 -04:00
subr_boot.c
subr_bufring.c
subr_bus_dma.c busdma: Add KMSAN integration 2021-08-10 21:27:54 -04:00
subr_bus.c devclass_alloc_unit: move "at" hint test to after device-in-use test 2021-08-02 11:27:17 -05:00
subr_busdma_bufalloc.c
subr_capability.c Remove "All Rights Reserved" from FreeBSD Foundation sys/ copyrights 2021-08-08 10:42:24 -04:00
subr_clock.c
subr_compressor.c
subr_counter.c Rationalize per-cpu zones. 2020-11-05 15:08:56 +00:00
subr_coverage.c Generalize bus_space(9) and atomic(9) sanitizer interceptors 2021-03-22 22:21:53 -04:00
subr_csan.c Simplify kernel sanitizer interceptors 2021-07-29 21:13:32 -04:00
subr_devmap.c ddb: fix show devmap output on 32-bit arm 2021-02-18 11:53:14 -04:00
subr_devstat.c Speed up geom_stats_resync in the presence of many devices 2021-03-02 18:33:45 -07:00
subr_disk.c Enable bioq 'car limit' added at r335066 at 128 bios. 2020-10-26 04:04:06 +00:00
subr_dummy_vdso_tc.c
subr_early.c
subr_epoch.c The old thread priority must be stored as part of the EPOCH(9) tracker. 2021-05-23 10:53:25 +02:00
subr_eventhandler.c
subr_fattime.c
subr_filter.c
subr_firmware.c firmware(9): extend firmware_get() by a "no warn" flag. 2021-01-27 13:51:26 +00:00
subr_gtaskqueue.c Import kernel WireGuard support 2020-11-29 19:38:03 +00:00
subr_hash.c
subr_hints.c Optimize res_find(). 2021-08-08 21:54:49 -04:00
subr_intr.c intrng: remove now redundant shadow variable. 2021-07-08 08:46:41 +02:00
subr_kdb.c kdb: Handle process enumeration before procinit() 2021-08-11 14:44:22 -03:00
subr_kobj.c newbus: Optimize/Simplify kobj_class_compile_common a little 2021-04-21 15:37:24 -06:00
subr_lock.c lockprof: move panic check after inspecting the state 2021-05-23 17:55:27 +00:00
subr_log.c Document kern.log_wakeups_per_second. 2021-08-04 11:50:34 -07:00
subr_mchain.c
subr_module.c sysctl debug.dump_modinfo should recognize font module 2021-01-08 09:24:49 +02:00
subr_msan.c kmsan: Export kmsan_mark_mbuf() and kmsan_mark_bio() 2021-08-11 16:33:41 -04:00
subr_msgbuf.c
subr_param.c Move mips and arm to 1000Hz by default. 2021-06-16 20:00:14 -06:00
subr_pcpu.c Add more per-cpu zones. 2020-11-09 00:34:23 +00:00
subr_pctrie.c
subr_physmem.c Add support for hw.physmem tunable for ARM/ARM64/RISC-V platforms 2020-12-03 05:39:27 +00:00
subr_pidctrl.c
subr_power.c
subr_prf.c kvprintf(9): add missing FALLTHROUGH 2021-01-22 00:18:40 +01:00
subr_prng.c
subr_prof.c x86: remove gcov kernel support 2021-04-02 15:41:51 +03:00
subr_rangeset.c Remove "All Rights Reserved" from FreeBSD Foundation sys/ copyrights 2021-08-08 10:42:24 -04:00
subr_rman.c rman: Remove an outdated comment that no longer applies 2021-07-05 16:15:03 +01:00
subr_rtc.c
subr_sbuf.c sbuf_uionew(): sbuf_new() takes int as length 2021-04-14 10:23:20 +03:00
subr_scanf.c
subr_sfbuf.c
subr_sglist.c sglist: Add sglist_append_single_mbuf(). 2021-05-25 16:59:18 -07:00
subr_sleepqueue.c Allow sleepq_signal() to drop the lock. 2021-06-25 14:12:21 -04:00
subr_smp.c Refactor/optimize cpu_search_*(). 2021-07-28 22:00:29 -04:00
subr_smr.c
subr_stack.c
subr_stats.c stats(3): Improve t-digest merging of samples which result in mu adjustment underflow. 2021-04-02 13:17:53 +11:00
subr_syscall.c Pass the syscall number to capsicum permission-denied signals 2021-07-16 18:06:44 +01:00
subr_taskqueue.c
subr_terminal.c Remove "All Rights Reserved" from FreeBSD Foundation sys/ copyrights 2021-08-08 10:42:24 -04:00
subr_trap.c amd64: Add MD bits for KMSAN 2021-08-10 21:27:53 -04:00
subr_turnstile.c Use atomic loads/stores when updating td->td_state 2021-02-18 14:02:48 +00:00
subr_uio.c
subr_unit.c
subr_vmem.c vmem: Revert r364744 2020-12-01 16:06:31 +00:00
subr_witness.c witness: remove ifnet_rw 2021-08-18 08:51:26 +02:00
sys_capability.c
sys_eventfd.c Drop "All rights reserved" from my copyright statements. 2021-07-20 10:05:50 +03:00
sys_generic.c Add fspacectl(2), vn_deallocate(9) and VOP_DEALLOCATE(9). 2021-08-05 23:20:42 +08:00
sys_getrandom.c
sys_pipe.c pipe_paircreate(): do not leak pipepair memory on error 2021-08-16 17:08:44 +03:00
sys_procdesc.c procdesc: convert the zone to a malloc type 2020-11-09 00:05:21 +00:00
sys_process.c sys_process.c: extract ptrace_unsuspend() 2021-05-25 18:22:27 +03:00
sys_socket.c Re-enable network ioctls in capability mode 2021-04-23 09:22:49 -04:00
syscalls.c Regen after 0dc332bff2 2021-08-05 23:22:02 +08:00
syscalls.master Add fspacectl(2), vn_deallocate(9) and VOP_DEALLOCATE(9). 2021-08-05 23:20:42 +08:00
systrace_args.c Regen after 0dc332bff2 2021-08-05 23:22:02 +08:00
sysv_ipc.c
sysv_msg.c jail: Change the locking around pr_ref and pr_uref 2021-02-21 10:55:44 -08:00
sysv_sem.c jail: Change the locking around pr_ref and pr_uref 2021-02-21 10:55:44 -08:00
sysv_shm.c jail: Change the locking around pr_ref and pr_uref 2021-02-21 10:55:44 -08:00
tty_compat.c
tty_info.c
tty_inq.c
tty_outq.c Minor style cleanup 2021-04-18 11:14:17 -06:00
tty_pts.c
tty_tty.c
tty_ttydisc.c
tty.c ttydev_write: prevent stops while terminal is busied 2021-05-18 20:52:03 +03:00
uipc_accf.c Consistently use the SOLISTENING() macro 2021-06-14 17:32:27 -04:00
uipc_debug.c
uipc_domain.c uipc: avoid circular pr_{slow,fast}timos 2021-08-18 12:46:54 -05:00
uipc_ktls.c ktls: Fix accounting for TLS 1.0 empty fragments. 2021-08-16 10:42:46 -07:00
uipc_mbuf2.c
uipc_mbuf.c m_dup: Handle unmapped mbufs as an input mbuf. 2021-07-26 14:09:16 -07:00
uipc_mbufhash.c Implement mbuf hashing routines for IP over infiniband, IPoIB. 2020-10-22 09:17:56 +00:00
uipc_mqueue.c jail: Change the locking around pr_ref and pr_uref 2021-02-21 10:55:44 -08:00
uipc_sem.c Convert remaining cap_rights_init users to cap_rights_init_one 2021-01-12 13:16:10 +00:00
uipc_shm.c fspacectl(2): Clarifies the return values 2021-08-24 17:08:28 +08:00
uipc_sockbuf.c socket: Implement SO_RERROR 2021-07-28 09:35:09 -07:00
uipc_socket.c socket: Implement SO_RERROR 2021-07-28 09:35:09 -07:00
uipc_syscalls.c Consistently use the SOLISTENING() macro 2021-06-14 17:32:27 -04:00
uipc_usrreq.c socket: Implement SO_RERROR 2021-07-28 09:35:09 -07:00
vfs_acl.c
vfs_aio.c lio_listio(2): Allow LIO_READV and LIO_WRITEV. 2021-08-22 23:00:42 +12:00
vfs_bio.c amd64: Populate the KMSAN shadow maps and integrate with the VM 2021-08-10 21:27:53 -04:00
vfs_cache.c cache: retire cache_fast_revlookup sysctl 2021-08-23 15:31:44 +02:00
vfs_cluster.c Minor style tidy: if( -> if ( 2021-04-18 11:19:15 -06:00
vfs_default.c fspacectl(2): Clarifies the return values 2021-08-24 17:08:28 +08:00
vfs_export.c
vfs_extattr.c
vfs_hash.c
vfs_init.c VFS_QUOTACTL(9): allow implementation to indicate busy state changes 2021-05-30 14:53:47 -07:00
vfs_lookup.c vfs: s/__unused/__diagused in crossmp_* 2021-08-23 15:23:42 +02:00
vfs_mount.c vfs: fix cache-relatecd LOR introduced in the previous change 2021-08-22 16:20:07 +00:00
vfs_mountroot.c vfs: Initialize "lastfail" in vfs_mountroot_wait() 2021-07-23 12:04:02 -04:00
vfs_subr.c VFS: remove MNTK_MARKER 2021-07-24 12:52:32 -07:00
vfs_syscalls.c fstatat(2): handle non-vnode file descriptors for AT_EMPTY_PATH 2021-08-14 00:17:18 +03:00
vfs_vnops.c vfs: Add ioflag to VOP_DEALLOCATE(9) 2021-08-12 23:03:49 +08:00
vnode_if.src vfs: Add ioflag to VOP_DEALLOCATE(9) 2021-08-12 23:03:49 +08:00