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authorDavid S. Miller <davem@davemloft.net>2011-09-17 03:34:00 +0400
committerDavid S. Miller <davem@davemloft.net>2011-09-17 03:34:00 +0400
commitf78a5fda9116525809d088917638be912b85f838 (patch)
treeab6d7edaa915cea74d6c664c3e39a5ad15bab0f8 /include/net
parent473e64ee4603671efa1e0785418e56e9ffdfc47b (diff)
downloadlinux-f78a5fda9116525809d088917638be912b85f838.tar.xz
Revert "Scm: Remove unnecessary pid & credential references in Unix socket's send and receive path"
This reverts commit 0856a304091b33a8e8f9f9c98e776f425af2b625. As requested by Eric Dumazet, it has various ref-counting problems and has introduced regressions. Eric will add a more suitable version of this performance fix. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
-rw-r--r--include/net/scm.h22
1 files changed, 3 insertions, 19 deletions
diff --git a/include/net/scm.h b/include/net/scm.h
index 68e1e481658e..745460fa2f02 100644
--- a/include/net/scm.h
+++ b/include/net/scm.h
@@ -53,14 +53,6 @@ static __inline__ void scm_set_cred(struct scm_cookie *scm,
cred_to_ucred(pid, cred, &scm->creds);
}
-static __inline__ void scm_set_cred_noref(struct scm_cookie *scm,
- struct pid *pid, const struct cred *cred)
-{
- scm->pid = pid;
- scm->cred = cred;
- cred_to_ucred(pid, cred, &scm->creds);
-}
-
static __inline__ void scm_destroy_cred(struct scm_cookie *scm)
{
put_pid(scm->pid);
@@ -78,15 +70,6 @@ static __inline__ void scm_destroy(struct scm_cookie *scm)
__scm_destroy(scm);
}
-static __inline__ void scm_release(struct scm_cookie *scm)
-{
- /* keep ref on pid and cred */
- scm->pid = NULL;
- scm->cred = NULL;
- if (scm->fp)
- __scm_destroy(scm);
-}
-
static __inline__ int scm_send(struct socket *sock, struct msghdr *msg,
struct scm_cookie *scm)
{
@@ -125,14 +108,15 @@ static __inline__ void scm_recv(struct socket *sock, struct msghdr *msg,
if (!msg->msg_control) {
if (test_bit(SOCK_PASSCRED, &sock->flags) || scm->fp)
msg->msg_flags |= MSG_CTRUNC;
- if (scm && scm->fp)
- __scm_destroy(scm);
+ scm_destroy(scm);
return;
}
if (test_bit(SOCK_PASSCRED, &sock->flags))
put_cmsg(msg, SOL_SOCKET, SCM_CREDENTIALS, sizeof(scm->creds), &scm->creds);
+ scm_destroy_cred(scm);
+
scm_passec(sock, msg, scm);
if (!scm->fp)