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user-runtime-dir: enforce /tmp/ and /dev/shm/ quota

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Enforce the quota on these two tmpfs at the same place where we mount
the per-user $XDG_RUNTIME_DIR. Conceptually these are very similar
concepts, and it makes sure to enforce the limits at the same place with
the same lifecycle.
This commit is contained in:
Lennart Poettering
2025-01-10 11:34:18 +01:00
parent 9ef12bc1d7
commit b1c95fb2e9
3 changed files with 173 additions and 33 deletions
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@@ -61,9 +61,11 @@ REQUIREMENTS:
≥ 5.9 for close_range()
≥ 5.12 for idmapped mount
≥ 5.14 for cgroup.kill
≥ 5.14 for quotactl_fd()
≥ 6.3 for MFD_EXEC/MFD_NOEXEC_SEAL and tmpfs noswap option
≥ 6.5 for name_to_handle_at() AT_HANDLE_FID, SO_PEERPIDFD/SO_PASSPIDFD,
and MOVE_MOUNT_BENEATH
≥ 6.6 for quota support on tmpfs
≥ 6.9 for pidfs
✅ systemd utilizes several new kernel APIs, but will fall back gracefully