userns: When the per user per user namespace limit is reached return ENOSPC
The current error codes returned when a the per user per user namespace limit are hit (EINVAL, EUSERS, and ENFILE) are wrong. I asked for advice on linux-api and it we made clear that those were the wrong error code, but a correct effor code was not suggested. The best general error code I have found for hitting a resource limit is ENOSPC. It is not perfect but as it is unambiguous it will serve until someone comes up with a better error code. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
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@@ -76,7 +76,7 @@ int create_user_ns(struct cred *new)
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struct ucounts *ucounts;
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int ret, i;
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ret = -EUSERS;
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ret = -ENOSPC;
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if (parent_ns->level > 32)
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goto fail;
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