summaryrefslogtreecommitdiffstats
path: root/net/dns_resolver
diff options
context:
space:
mode:
authorDavid Howells <dhowells@redhat.com>2015-10-21 14:04:48 +0100
committerDavid Howells <dhowells@redhat.com>2015-10-21 15:18:36 +0100
commit146aa8b1453bd8f1ff2304ffb71b4ee0eb9acdcc (patch)
treea89ef2cd2e8029b0c09a58739cca0e7e2e68f4db /net/dns_resolver
parent4adc605edc5f744dcf432241b5996ff6a13d868c (diff)
downloadlinux-stable-146aa8b1453bd8f1ff2304ffb71b4ee0eb9acdcc.tar.gz
linux-stable-146aa8b1453bd8f1ff2304ffb71b4ee0eb9acdcc.tar.bz2
linux-stable-146aa8b1453bd8f1ff2304ffb71b4ee0eb9acdcc.zip
KEYS: Merge the type-specific data with the payload data
Merge the type-specific data with the payload data into one four-word chunk as it seems pointless to keep them separate. Use user_key_payload() for accessing the payloads of overloaded user-defined keys. Signed-off-by: David Howells <dhowells@redhat.com> cc: linux-cifs@vger.kernel.org cc: ecryptfs@vger.kernel.org cc: linux-ext4@vger.kernel.org cc: linux-f2fs-devel@lists.sourceforge.net cc: linux-nfs@vger.kernel.org cc: ceph-devel@vger.kernel.org cc: linux-ima-devel@lists.sourceforge.net
Diffstat (limited to 'net/dns_resolver')
-rw-r--r--net/dns_resolver/dns_key.c20
-rw-r--r--net/dns_resolver/dns_query.c7
-rw-r--r--net/dns_resolver/internal.h8
3 files changed, 22 insertions, 13 deletions
diff --git a/net/dns_resolver/dns_key.c b/net/dns_resolver/dns_key.c
index 31cd4fd75486..c79b85eb4d4c 100644
--- a/net/dns_resolver/dns_key.c
+++ b/net/dns_resolver/dns_key.c
@@ -122,7 +122,7 @@ dns_resolver_preparse(struct key_preparsed_payload *prep)
goto bad_option_value;
kdebug("dns error no. = %lu", derrno);
- prep->type_data[0] = ERR_PTR(-derrno);
+ prep->payload.data[dns_key_error] = ERR_PTR(-derrno);
continue;
}
@@ -137,8 +137,8 @@ dns_resolver_preparse(struct key_preparsed_payload *prep)
/* don't cache the result if we're caching an error saying there's no
* result */
- if (prep->type_data[0]) {
- kleave(" = 0 [h_error %ld]", PTR_ERR(prep->type_data[0]));
+ if (prep->payload.data[dns_key_error]) {
+ kleave(" = 0 [h_error %ld]", PTR_ERR(prep->payload.data[dns_key_error]));
return 0;
}
@@ -155,7 +155,7 @@ dns_resolver_preparse(struct key_preparsed_payload *prep)
memcpy(upayload->data, data, result_len);
upayload->data[result_len] = '\0';
- prep->payload[0] = upayload;
+ prep->payload.data[dns_key_data] = upayload;
kleave(" = 0");
return 0;
}
@@ -167,7 +167,7 @@ static void dns_resolver_free_preparse(struct key_preparsed_payload *prep)
{
pr_devel("==>%s()\n", __func__);
- kfree(prep->payload[0]);
+ kfree(prep->payload.data[dns_key_data]);
}
/*
@@ -223,10 +223,10 @@ static int dns_resolver_match_preparse(struct key_match_data *match_data)
*/
static void dns_resolver_describe(const struct key *key, struct seq_file *m)
{
- int err = key->type_data.x[0];
-
seq_puts(m, key->description);
if (key_is_instantiated(key)) {
+ int err = PTR_ERR(key->payload.data[dns_key_error]);
+
if (err)
seq_printf(m, ": %d", err);
else
@@ -241,8 +241,10 @@ static void dns_resolver_describe(const struct key *key, struct seq_file *m)
static long dns_resolver_read(const struct key *key,
char __user *buffer, size_t buflen)
{
- if (key->type_data.x[0])
- return key->type_data.x[0];
+ int err = PTR_ERR(key->payload.data[dns_key_error]);
+
+ if (err)
+ return err;
return user_read(key, buffer, buflen);
}
diff --git a/net/dns_resolver/dns_query.c b/net/dns_resolver/dns_query.c
index 39d2c39bdf87..4677b6fa6dda 100644
--- a/net/dns_resolver/dns_query.c
+++ b/net/dns_resolver/dns_query.c
@@ -70,7 +70,7 @@ int dns_query(const char *type, const char *name, size_t namelen,
const char *options, char **_result, time_t *_expiry)
{
struct key *rkey;
- struct user_key_payload *upayload;
+ const struct user_key_payload *upayload;
const struct cred *saved_cred;
size_t typelen, desclen;
char *desc, *cp;
@@ -137,12 +137,11 @@ int dns_query(const char *type, const char *name, size_t namelen,
goto put;
/* If the DNS server gave an error, return that to the caller */
- ret = rkey->type_data.x[0];
+ ret = PTR_ERR(rkey->payload.data[dns_key_error]);
if (ret)
goto put;
- upayload = rcu_dereference_protected(rkey->payload.data,
- lockdep_is_held(&rkey->sem));
+ upayload = user_key_payload(rkey);
len = upayload->datalen;
ret = -ENOMEM;
diff --git a/net/dns_resolver/internal.h b/net/dns_resolver/internal.h
index 7af1ed39c009..0c570d40e4d6 100644
--- a/net/dns_resolver/internal.h
+++ b/net/dns_resolver/internal.h
@@ -23,6 +23,14 @@
#include <linux/sched.h>
/*
+ * Layout of key payload words.
+ */
+enum {
+ dns_key_data,
+ dns_key_error,
+};
+
+/*
* dns_key.c
*/
extern const struct cred *dns_resolver_cache;