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| author | Jeff Layton <jlayton@redhat.com> | 2010-01-07 17:42:02 +0300 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2010-02-10 16:30:50 +0300 |
| commit | dc5ddce956660247e004a4b20a26b7d137ab1644 (patch) | |
| tree | 8e067bfb6f1fc84adf76a9370e35fbad77dd4636 /net/sunrpc | |
| parent | ac73fddfc523bf3c3525d16356b44527c44fae6d (diff) | |
| download | linux-dc5ddce956660247e004a4b20a26b7d137ab1644.tar.xz | |
sunrpc: parse and return errors reported by gssd
The kernel currently ignores any error code sent by gssd and always
considers it to be -EACCES. In order to better handle the situation of
an expired KRB5 TGT, the kernel needs to be able to parse and deal with
the errors that gssd sends. Aside from -EACCES the only error we care
about is -EKEYEXPIRED, which we're using to indicate that the upper
layers should retry the call a little later.
To maintain backward compatibility with older gssd's, any error other
than -EKEYEXPIRED is interpreted as -EACCES.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net/sunrpc')
| -rw-r--r-- | net/sunrpc/auth_gss/auth_gss.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c index f7a7f8380e38..0cfccc2a0297 100644 --- a/net/sunrpc/auth_gss/auth_gss.c +++ b/net/sunrpc/auth_gss/auth_gss.c @@ -206,8 +206,14 @@ gss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct ctx->gc_win = window_size; /* gssd signals an error by passing ctx->gc_win = 0: */ if (ctx->gc_win == 0) { - /* in which case, p points to an error code which we ignore */ - p = ERR_PTR(-EACCES); + /* + * in which case, p points to an error code. Anything other + * than -EKEYEXPIRED gets converted to -EACCES. + */ + p = simple_get_bytes(p, end, &ret, sizeof(ret)); + if (!IS_ERR(p)) + p = (ret == -EKEYEXPIRED) ? ERR_PTR(-EKEYEXPIRED) : + ERR_PTR(-EACCES); goto err; } /* copy the opaque wire context */ @@ -646,6 +652,7 @@ gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) err = PTR_ERR(p); switch (err) { case -EACCES: + case -EKEYEXPIRED: gss_msg->msg.errno = err; err = mlen; break; |