feat(ipc/sem): add semaphore support for dragonOS - #2172

Merged

fslongjin merged 34 commits into

DragonOS-Community:masterfrom

mistcoversmyeyes:feat/ipc-sem-2142

Sep 7, 2026

Commits on Sep 5, 2026

refactor(ipc): extract generic SysV IPC permission module

mistcoversmyeyes
authored and
fslongjin
committed
44b822c
feat(ipc): implement System V semaphore syscalls

mistcoversmyeyes
authored and
fslongjin
committed
22dcdd8
test(ipc): add SysV semaphore dunitest suite

mistcoversmyeyes
authored and
fslongjin
committed
7dabc9e
style(ipc): satisfy kernel formatting checks

mistcoversmyeyes
authored and
fslongjin
committed
a807b3c
style(ipc): translate SysV semaphore comments to English

mistcoversmyeyes
authored and
fslongjin
committed
49075ea
fix(ipc): make IPC_SET permission updates atomic

mistcoversmyeyes
authored and
fslongjin
committed
0650199
fix(ipc): make semaphore set allocation fallible

mistcoversmyeyes
authored and
fslongjin
committed
4d4346c
feat(ipc): implement SysV SEM_UNDO lifecycle

mistcoversmyeyes
authored and
fslongjin
committed
1257bce
fix(ipc): mark allocated IDs in release builds

mistcoversmyeyes
authored and
fslongjin
committed
7e9b503
fix(ipc): prioritize const semaphore waiters

mistcoversmyeyes
authored and
fslongjin
committed
8678779
fix(process): preserve reaped PID identity

mistcoversmyeyes
authored and
fslongjin
committed
26da368
fix(process): preserve exec locking in prepared namespace publication
fslongjin
committed
73467d1
fix(ipc): harden semaphore allocation and Linux syscall semantics
fslongjin
committed
03c0e03
test(fuse): handle background writeback in direct-drain assertions
fslongjin
committed
27c67d5
fix(ipc): make bulk semaphore buffers fallible and prepare queue growth unlocked
fslongjin
committed
b3f637c
fix(ipc): prepare undo registry growth outside the namespace lock
fslongjin
committed
dbcd42f
fix(ipc): scope semaphore undo cleanup and defer wakeups
fslongjin
committed
e150302
fix(ipc): reclaim unused semaphore undo registry storage
fslongjin
committed
d313722
fix(ipc): skip empty unshare installs and cache the maximum ID index
fslongjin
committed
72b3749
fix(namespace): make prepared fs copies fallible
fslongjin
committed
8d1e231
fix(ipc): prepare semaphore storage outside the lock and unlink waiters directly
fslongjin
committed
2c64d68
fix(dunitest): use real deadlines when collecting child output
fslongjin
committed
b2717d7
fix(ipc): reuse live undo records and replay one set at a time
fslongjin
committed
dabd730
fix(ipc): defer semaphore removal reclamation until after unlock
fslongjin
committed
277351e

Navigation Menu

Uh oh!

feat(ipc/sem): add semaphore support for dragonOS - #2172

feat(ipc/sem): add semaphore support for dragonOS#2172
fslongjin merged 34 commits into
DragonOS-Community:masterfrom
mistcoversmyeyes:feat/ipc-sem-2142

Commits on Sep 5, 2026

refactor(ipc): extract generic SysV IPC permission module

feat(ipc): implement System V semaphore syscalls

test(ipc): add SysV semaphore dunitest suite

style(ipc): satisfy kernel formatting checks

style(ipc): translate SysV semaphore comments to English

fix(ipc): make IPC_SET permission updates atomic

fix(ipc): make semaphore set allocation fallible

feat(ipc): implement SysV SEM_UNDO lifecycle

fix(ipc): mark allocated IDs in release builds

fix(ipc): prioritize const semaphore waiters

fix(process): preserve reaped PID identity

fix(process): preserve exec locking in prepared namespace publication

fix(ipc): harden semaphore allocation and Linux syscall semantics

test(fuse): handle background writeback in direct-drain assertions

fix(ipc): make bulk semaphore buffers fallible and prepare queue growth unlocked

fix(ipc): prepare undo registry growth outside the namespace lock

fix(ipc): scope semaphore undo cleanup and defer wakeups

fix(ipc): reclaim unused semaphore undo registry storage

fix(ipc): skip empty unshare installs and cache the maximum ID index

fix(namespace): make prepared fs copies fallible

fix(ipc): prepare semaphore storage outside the lock and unlink waiters directly

fix(dunitest): use real deadlines when collecting child output

fix(ipc): reuse live undo records and replay one set at a time

fix(ipc): defer semaphore removal reclamation until after unlock

Commits on Sep 6, 2026

fix(ipc): cache wait counts and retain zero undo records

docs: remove sem undo implementation plan and design spec

refactor(ipc): separate semaphore state, operations and undo lifecycle

perf(ipc): preindex semaphore scratch and reclaim undo record storage

fix(ipc): correct semaphore ABI and index undo records

fix(ipc): replay detached undo outside fs publication barrier

fix(ipc): skip semaphore queue scans when waiter state is unchanged

test(ipc): preserve creator group access after semaphore IPC_SET

perf(ipc): index semaphore set undo associations

fix(ci): match syscall boot markers literally