fscrypt: improve warnings for missing crypto API support

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Users of fscrypt with non-default algorithms will encounter an error
like the following if they fail to include the needed algorithms into
the crypto API when configuring the kernel (as per the documentation):

    Error allocating 'adiantum(xchacha12,aes)' transform: -2

This requires that the user figure out what the "-2" error means.
Make it more friendly by printing a warning like the following instead:

    Missing crypto API support for Adiantum (API name: "adiantum(xchacha12,aes)")

Also upgrade the log level for *other* errors to KERN_ERR.

Signed-off-by: Eric Biggers <ebiggers@google.com>

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This commit is contained in:

Eric Biggers 2019-07-24 11:07:59 -07:00

parent 63f668f0de

commit a4d14e915b

1 changed files with 14 additions and 5 deletions

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fs/crypto/keyinfo.c

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