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mountfsd: make MountDirectory() work with systemd-homed

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systemd-homed already applies an idmap to its mounts, hence we need to
undo it before we can create our own.
This commit is contained in:
Lennart Poettering
2025-10-15 10:21:59 +02:00
committed by Daan De Meyer
parent 0d87de0b8e
commit 9f69ff69f7
5 changed files with 94 additions and 17 deletions
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src/shared/mount-util.h
+2 -1
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@@ -145,7 +145,8 @@ typedef enum RemountIdmapping {
_REMOUNT_IDMAPPING_INVALID = -EINVAL,
} RemountIdmapping;
int open_tree_attr_with_fallback(int dir_fd, const char *path, unsigned int flags, struct mount_attr *attr);
int open_tree_attr_with_fallback(int dir_fd, const char *path, unsigned flags, struct mount_attr *attr);
int open_tree_try_drop_idmap(int dir_fd, const char *path, unsigned flags);
int make_userns(uid_t uid_shift, uid_t uid_range, uid_t host_owner, uid_t dest_owner, RemountIdmapping idmapping);
int remount_idmap_fd(char **p, int userns_fd, uint64_t extra_mount_attr_set);