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In order to be able to identify a file exchange with renameat2(2) and RENAME_EXCHANGE, which will be useful for Landlock [1], propagate the rename flags to LSMs. This may also improve performance because of the switch from two set of LSM hook calls to only one, and because LSMs using this hook may optimize the double check (e.g. only one lock, reduce the number of path walks). AppArmor, Landlock and Tomoyo are updated to leverage this change. This should not change the current behavior (same check order), except (different level of) speed boosts. [1] https://lore.kernel.org/r/20220221212522.320243-1-mic@digikod.net Cc: James Morris <jmorris@namei.org> Cc: Kentaro Takeda <takedakn@nttdata.co.jp> Cc: Serge E. Hallyn <serge@hallyn.com> Acked-by: John Johansen <john.johansen@canonical.com> Acked-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Reviewed-by: Paul Moore <paul@paul-moore.com> Signed-off-by: Mickaël Salaün <mic@digikod.net> Link: https://lore.kernel.org/r/20220506161102.525323-7-mic@digikod.net |
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| .. | ||
| policy | ||
| .gitignore | ||
| audit.c | ||
| common.c | ||
| common.h | ||
| condition.c | ||
| domain.c | ||
| environ.c | ||
| file.c | ||
| gc.c | ||
| group.c | ||
| Kconfig | ||
| load_policy.c | ||
| Makefile | ||
| memory.c | ||
| mount.c | ||
| network.c | ||
| realpath.c | ||
| securityfs_if.c | ||
| tomoyo.c | ||
| util.c | ||